CN117464107B - A method for electrolytic machining of inner raceway of workpiece - Google Patents
A method for electrolytic machining of inner raceway of workpieceInfo
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- CN117464107B CN117464107B CN202311492773.1A CN202311492773A CN117464107B CN 117464107 B CN117464107 B CN 117464107B CN 202311492773 A CN202311492773 A CN 202311492773A CN 117464107 B CN117464107 B CN 117464107B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
- B23H3/04—Electrodes specially adapted therefor or their manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
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- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
本发明涉及精密电解加工技术领域，提出的工件内滚道的电解加工方法，通过将工件装配于安装座上，使用封液罩对工件进行密封，将流动的电解液密封在封液罩内，并浸没工件，制备阶梯式螺旋电极，阶梯式螺旋电极包括N段阶梯状螺旋纹，再通过将阶梯式螺旋电极装配到电解机床的主轴，根据螺纹高度从小到大的顺序，控制电解机床的主轴带动N段阶梯状螺旋纹中不同螺纹高度的阶梯状螺旋纹先后定位在工件内侧的加工位置，对工件进行分阶段径向电解加工，在工件的内壁径向方向由浅入深，分阶段加工生成内滚道，提升加工精度和效率。
The invention relates to the technical field of precision electrolytic machining, and proposes an electrolytic machining method for an inner raceway of a workpiece. The method comprises the following steps: assembling the workpiece on a mounting seat, sealing the workpiece with a liquid sealing cover, sealing a flowing electrolyte in the liquid sealing cover, and immersing the workpiece to prepare a stepped spiral electrode, wherein the stepped spiral electrode comprises N sections of stepped spiral patterns. The stepped spiral electrode is then assembled to a spindle of an electrolytic machine tool, and the spindle of the electrolytic machine tool is controlled to drive the stepped spiral patterns with different thread heights in the N sections of stepped spiral patterns to be positioned successively at machining positions on the inner side of the workpiece according to the order of thread height from small to large. The workpiece is subjected to radial electrolytic machining in stages, and an inner raceway is generated by machining in stages from shallow to deep in the radial direction of the inner wall of the workpiece, thereby improving machining accuracy and efficiency.
Description
Technical Field
The invention relates to the technical field of precision electrolytic machining, in particular to an electrolytic machining method, an electrolytic device and an electrolytic machine tool for an inner roller path of a workpiece.
Background
Among the electrolytic machining processes, the electrochemical forming process is a high-precision, non-thermal electrolytic machining method suitable for the manufacture of workpieces of complex shapes. In general, electrochemical forming uses electrodes with special shapes, which are often designed according to the desired shape and configuration of the workpiece. The electrochemical forming can realize very high processing precision due to the electrode with special shape, and subsequent mechanical processing steps are not needed or reduced, thereby being beneficial to reducing the times and cost of workpiece processing. Meanwhile, the electrochemical forming is a non-thermal processing method, so that heating or thermal stress of the workpiece cannot be caused, and the material performance and the dimensional stability of the workpiece are maintained. In addition, electrochemical forming can be used to process a variety of materials, including higher hardness metallic materials such as stainless steel, nickel-based alloys, titanium alloys, and the like. In the prior art, electrolytic processes have used a conical spiral electrode for machining the desired shape of the workpiece. Tapered spiral electrodes are typically only capable of machining shapes of workpieces with low precision requirements and are inefficient. The conical spiral electrode cannot meet the requirement of processing an inner raceway with high precision in a workpiece.
In summary, the conventional electrolytic machining technology has technical problems of low machining precision, low efficiency and the like.
Disclosure of Invention
The invention aims to at least solve the defects in the prior art to a certain extent, and provides an electrolytic machining method for an inner roller path of a workpiece so as to improve machining precision and efficiency.
The invention provides an electrolytic machining method of an inner roller path of a workpiece, which comprises the following steps:
assembling the workpiece on the mounting seat, sealing the workpiece by using a sealing liquid cover, sealing flowing electrolyte in the sealing liquid cover, immersing the workpiece, sealing the flowing electrolyte in the sealing liquid cover, and immersing the workpiece;
preparing a stepped spiral electrode, wherein the stepped spiral electrode comprises N sections of stepped spiral lines, and the thread height of the K-th stepped spiral line is smaller than the thread height of the K+1th stepped spiral line in the N sections of stepped spiral lines, wherein K is a natural number greater than or equal to 1;
And assembling the stepped spiral electrode to a main shaft of an electrolytic machine tool, and controlling the main shaft of the electrolytic machine tool to drive stepped spiral lines with different thread heights in the N sections of stepped spiral lines to carry out radial electrolytic machining at machining positions on the inner side of a workpiece according to the sequence from small thread heights to large thread heights so as to generate an inner raceway on the inner wall of the workpiece.
Further, when N is equal to 3, the spindle of the electrolytic machine tool is controlled to drive the step-shaped spiral lines with the thread heights of 1 st low, 2 nd low and 3 rd low in the 3 sections of step-shaped spiral lines to carry out radial electrolytic machining at the machining position on the inner side of the workpiece in sequence so as to generate an inner raceway on the inner wall of the workpiece.
Further, the spindle of the electrolytic machine tool is controlled to drive the 1 st, 2 nd and 3 rd low step spiral lines of the 3-section step spiral lines to carry out radial electrolytic machining at the machining position of the inner side of the workpiece in order to generate an inner raceway on the inner wall of the workpiece, and the method comprises the following steps:
controlling a main shaft of the electrolytic machine tool to drive the step-shaped spiral threads with the 1 st low thread height in the 3 steps of step-shaped spiral threads to move to the inner wall of the inner side of the workpiece, and electrolytic machining a1 st depth groove at a machining position of the inner wall of the inner side of the workpiece;
Controlling a main shaft of the electrolytic machine tool to drive a step-shaped spiral groove with the 2 nd low thread height in 3 steps of step-shaped spiral grooves to be gradually formed into a1 st depth groove, and electrolytic machining the 2 nd depth groove at a radial machining position of the 1 st depth groove;
and controlling a main shaft of the electrolytic machine tool to drive the 3 rd low-height stepped spiral groove in the 3 rd stepped spiral groove to be spirally progressive to the 2 nd low-depth groove, and electrolytic machining the 3 rd depth groove at the radial machining position of the 2 nd low-depth groove.
Further, when the workpiece is positioned below the stepped spiral electrode before machining is started, the main shaft of the electrolytic machine tool is controlled to drive the stepped spiral threads with the 1 st low thread height in the 3 sections of stepped spiral threads to move to the inner wall of the inner side of the workpiece, and the main shaft of the electrolytic machine tool is controlled to drive the stepped spiral threads with the 1 st low thread height in the 3 sections of stepped spiral threads to move downwards to the inner wall of the inner side of the workpiece.
Further, when the stepped spiral electrode is positioned in the workpiece, the main shaft of the electrolytic machine tool is controlled to drive the step spiral groove with the low thread height 2 in the 3-section step spiral groove to be spirally progressive to the 1 st depth groove, and the step spiral electrode comprises the step of controlling the main shaft of the electrolytic machine tool to drive the step spiral groove with the low thread height 2 in the 3-section step spiral groove to be spirally progressive to the 1 st depth groove.
Further, when the stepped spiral electrode is positioned in the workpiece, the main shaft of the electrolytic machine tool is controlled to drive the 3 rd low stepped spiral groove in the 3 rd stepped spiral groove to spirally progress to the 2 nd low depth groove, and the step spiral electrode comprises the step of controlling the main shaft of the electrolytic machine tool to drive the 3 rd low stepped spiral groove in the 3 rd stepped spiral groove to spirally progress to the 2 nd depth groove.
Further, sealing the flowing electrolyte within the enclosure and immersing the workpiece, comprising:
connecting an electrolyte transmission system with a liquid inlet of the mounting seat, wherein the liquid inlet is communicated with the liquid sealing cover;
and controlling the electrolyte conveying system to convey flowing electrolyte to the liquid inlet, sealing the flowing electrolyte in the liquid sealing cover, and immersing the workpiece.
Further, the workpiece is a circular ring-shaped body, the circular ring-shaped body comprises an inner ring and an outer ring, and the inner ring is the inner side of the workpiece.
Further, the inner raceway is a thread groove.
Further, the stepped spiral electrode comprises a spiral cathode body and stepped spiral threads, wherein the stepped spiral threads are formed on the outer wall of the spiral cathode body and are electrically communicated with the interior of the spiral cathode body, and the stepped spiral threads comprise the N sections of stepped spiral threads.
Further, the spiral cathode body comprises a shaft connecting portion and a spiral line setting portion, wherein the shaft connecting portion is used for connecting a main shaft of an electrolytic machine tool, and the spiral line setting portion is used for setting and forming the stepped spiral line.
Further, the shaft connecting part and the spiral thread setting part are integrally connected, the shaft connecting part is a cylinder, the spiral thread setting part is a cylinder, and the diameter of the shaft connecting part is smaller than that of the spiral thread setting part.
5. Further, in the N sections of step-shaped spiral lines, the pitches of different sections of step-shaped spiral lines are equal, the thread lengths are equal, and the N sections of step-shaped spiral lines are positioned on the same spiral line.
Further, in the N sections of step-shaped spiral lines, the thread heights of different sections of step-shaped spiral lines are different, and the thread heights of the main shaft of the electrolytic machine tool are higher when the direction of the main shaft of the electrolytic machine tool is taken as a reference;
Compared with the prior art, the invention has the beneficial effects that:
According to the electrolytic machining method for the inner raceway of the workpiece, the workpiece is assembled on the mounting seat, the sealing liquid cover is used for sealing the workpiece, flowing electrolyte is sealed in the sealing liquid cover, the workpiece is immersed in the sealing liquid cover, the stepped spiral electrode is prepared, the stepped spiral electrode comprises N sections of stepped spiral lines, in the N sections of stepped spiral lines, the thread height of the K section of stepped spiral line is smaller than the thread height of the K+1 section of stepped spiral line, K is a natural number greater than or equal to 1, the stepped spiral electrode is assembled on a main shaft of an electrolytic machine tool, according to the sequence of the thread heights from small to large, the main shaft of the electrolytic machine tool is controlled to drive the stepped spiral lines with different thread heights in the N sections of stepped spiral lines to conduct radial electrolytic machining at machining positions inside the workpiece, so that the stepped spiral lines move to the machining positions inside the workpiece, the radial machining efficiency of the workpiece is improved, and the radial machining efficiency of the stepped spiral lines is increased in the radial machining direction, and the radial machining precision of the inner raceway is increased.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic flow chart of an electrolytic machining method of an inner race of a workpiece according to an embodiment of the invention;
FIG. 2 is a schematic view of a stepped spiral electrode according to an embodiment of the present invention;
FIG. 3 is a schematic view of another configuration of a stepped spiral electrode according to an embodiment of the present invention;
FIG. 4 is a schematic view of another configuration of a stepped spiral electrode according to an embodiment of the present invention;
FIG. 5 is a schematic view of another configuration of a stepped spiral electrode according to an embodiment of the present invention;
FIG. 6 is a schematic view of a structure of a workpiece according to an embodiment of the invention;
FIG. 7 is a schematic view showing a structure of an electrolytic device according to an embodiment of the present invention;
FIG. 8 is a schematic view of another structure of an electrolytic device according to an embodiment of the present invention, and FIG. 9 is a schematic view of an architecture of an electrolytic machine according to an embodiment of the present invention.
In the drawings, each reference numeral denotes:
1. a spiral cathode body, a shaft connecting part, a spiral line setting part and a spiral line connecting part;
2. step-shaped spiral lines, 20, first step-shaped spiral lines, 21, second step-shaped spiral lines, 22, third step-shaped spiral lines, 23, step intervals, 24 and screw pitches;
3. 30 parts of workpieces, an inner raceway, 31 parts of inner rings, 32 parts of outer rings;
4. a main shaft of an electrolytic machine tool;
5. A mounting base;
6. and (5) sealing the liquid cover.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar methods or methods having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present invention and should not be construed as limiting the invention, and all other embodiments, based on the embodiments of the present invention, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present invention.
Example 1
Referring to fig. 1-9, the present embodiment provides an electrolytic machining method for an inner race of a workpiece, comprising the steps of:
s101, assembling a workpiece on a mounting seat, sealing the workpiece by using a sealing liquid cover, sealing flowing electrolyte in the sealing liquid cover, immersing the workpiece, sealing the flowing electrolyte in the sealing liquid cover, and immersing the workpiece;
s102, preparing a stepped spiral electrode, wherein the stepped spiral electrode comprises N sections of stepped spiral lines, the thread height of the K-th stepped spiral line is smaller than the thread height of the K+1th stepped spiral line, and K is a natural number larger than or equal to 1;
And S103, assembling the stepped spiral electrode to a main shaft of an electrolytic machine tool, and controlling the main shaft of the electrolytic machine tool to drive stepped spiral lines with different thread heights in the N sections of stepped spiral lines to carry out radial electrolytic machining at machining positions on the inner side of a workpiece according to the sequence from small thread heights to large thread heights so as to generate an inner raceway on the inner wall of the workpiece.
After the stepped spiral electrode is assembled to the spindle of the electrolytic machine tool, the method may include controlling the spindle of the electrolytic machine tool to drive the stepped spiral electrode to move so that the central axis of the stepped spiral electrode is coaxial with the central axis of the inner side of the workpiece. For example, when the workpiece is annular, the central axis of the stepped spiral electrode is coaxial with the cylindrical surface axis of the annular workpiece.
In this embodiment, the workpiece 3 is assembled on the mounting seat 5, the workpiece is sealed by using the sealing liquid cover 6, the flowing electrolyte is sealed in the sealing liquid cover 6 and submerges the workpiece, the stepped spiral electrode is prepared, the stepped spiral electrode comprises N sections of stepped spiral lines, the thread height of the kth section of stepped spiral line is smaller than the thread height of the kth+1th section of stepped spiral line, K is a natural number greater than or equal to 1, the stepped spiral electrode is assembled on the spindle 4 of the electrolytic machine tool, the spindle of the electrolytic machine tool is controlled to drive the stepped spiral lines with different thread heights in the N sections of stepped spiral lines to perform radial electrolytic machining at the machining position inside the workpiece according to the sequence of the thread heights, so that the stepped spiral lines move to the machining position inside the workpiece in a stepwise manner, the workpiece is subjected to radial electrolytic machining in a stepwise manner, the radial machining is performed on the workpiece, and the stepwise machining efficiency and the stepwise machining precision are improved from the radial direction to the deep position inside the workpiece.
In this embodiment, N may be any natural number greater than 2. When N is equal to 3, the spindle of the electrolytic machine tool is controlled to drive the step-shaped spiral lines with the thread heights of 1 st low, 2 nd low and 3 rd low in the 3 sections of step-shaped spiral lines to carry out radial electrolytic machining at the machining position on the inner side of the workpiece in sequence so as to generate an inner raceway on the inner wall of the workpiece. Preferably, the spindle of the electrolytic machine tool is controlled to drive the step-shaped spiral lines with the thread heights of 1 st, 2 nd and 3 rd to sequentially carry out radial electrolytic machining at the machining position on the inner side of a workpiece so as to generate an inner raceway on the inner wall of the workpiece, and the method comprises the steps of controlling the spindle of the electrolytic machine tool to drive the step-shaped spiral lines with the thread heights of 1 st to move to the inner wall on the inner side of the workpiece, carrying out electrolytic machining on the 1 st depth groove at the machining position on the inner wall on the inner side of the workpiece, controlling the spindle of the electrolytic machine tool to drive the step-shaped spiral lines with the thread heights of 2 nd to gradually move to the 1 st depth groove at the radial machining position on the 1 st depth groove, and carrying out electrolytic machining on the step-shaped spiral lines with the thread heights of 3 rd to gradually move to the 2 nd depth groove at the radial machining position on the 2 nd depth groove.
Preferably, when the workpiece is positioned below the stepped spiral electrode before machining is started, the main shaft of the electrolytic machine tool is controlled to drive the stepped spiral with the 1 st low thread height in the 3 steps of stepped spiral to move to the inner wall of the inner side of the workpiece, and the main shaft of the electrolytic machine tool is controlled to drive the stepped spiral with the 1 st low thread height in the 3 steps of stepped spiral to move downwards to the inner wall of the inner side of the workpiece.
Preferably, when the stepped spiral electrode is positioned in the workpiece, the main shaft of the electrolytic machine tool is controlled to drive the stepped spiral groove with the low thread height 2 in the 3-section stepped spiral groove to be spirally progressive to the 1 st depth groove, and the step spiral electrode comprises the step of controlling the main shaft of the electrolytic machine tool to drive the stepped spiral groove with the low thread height 2 in the 3-section stepped spiral groove to be spirally progressive to the 1 st depth groove.
Preferably, when the stepped spiral electrode is positioned in the workpiece, the main shaft of the electrolytic machine tool is controlled to drive the 3 rd low stepped spiral groove in the 3 rd stepped spiral groove to spirally progress to the 2 nd low depth groove, and the step spiral electrode comprises the step of controlling the main shaft of the electrolytic machine tool to drive the 3 rd low stepped spiral groove in the 3 rd stepped spiral groove to spirally progress to the 2 nd depth groove.
The method for sealing the flowing electrolyte in the liquid sealing cover and immersing the workpiece comprises the steps of connecting an electrolyte conveying system with a liquid inlet of the mounting seat, communicating the liquid inlet with the liquid sealing cover, controlling the electrolyte conveying system to convey the flowing electrolyte to the liquid inlet, sealing the flowing electrolyte in the liquid sealing cover and immersing the workpiece.
Example two
Referring to fig. 1 to 9, the prepared stepped spiral electrode includes:
The spiral cathode body 1, the inside of the spiral cathode body 1 is used for conducting current;
the stepped spiral line 2 is formed on the outer wall of the spiral cathode body 1 and is electrically communicated with the inside of the spiral cathode body 1, and before the electrolytic machining of the inner raceway 30 on the inner side of a workpiece, the stepped spiral line 2 moves to a machining position on the inner side of the workpiece in a spiral manner to carry out staged radial electrolytic machining on the workpiece 3 so as to generate the inner raceway 30 on the inner wall of the workpiece 3.
The inner race 30 is a ring-shaped groove formed on the inner side of the workpiece, and the inner race 30 may be a thread groove, for example. The workpiece 3 may be a ring-shaped body, and the ring-shaped body includes an inner ring 31 and an outer ring 32, where the inner ring 31 is the inner side of the workpiece. The inner race 30 is formed on the side wall of the inner ring 31 of the annular body workpiece 3 by electrolytic machining.
In the prior art, there is a technique of machining a shape required for the workpiece 3 using a tapered spiral electrode, but the tapered spiral electrode is generally only capable of machining a shape of the workpiece 3 requiring low accuracy and is inefficient. The conical spiral electrode cannot meet the requirement that an inner race 30 with high accuracy requirements needs to be machined into the workpiece 3. In this embodiment, the stepped spiral thread 2 is disposed on the outer wall of the spiral cathode body 1, and before the electrolytic machining of the inner raceway 30 on the inner side of the workpiece, the stepped spiral thread 2 spirally moves to the machining position on the inner side of the workpiece to perform staged radial electrolytic machining on the workpiece 3, so that the inner raceway 30 is formed on the inner wall of the workpiece 3, and high-precision and high-efficiency electrolytic machining is realized.
The stepwise radial electrolytic machining of the workpiece 3 refers to the stepwise feature of the stepped spiral pattern 2, and the machining position inside the workpiece is machined by the kth step spiral pattern 2 and then by the kth+1th step spiral pattern 2. The K-th step spiral pattern 2 is adjacent to the K+1th step spiral pattern 2. For example, the first step-shaped spiral thread 20 is used for machining the machining position on the inner side of the workpiece, the second step-shaped spiral thread 21 is used for machining the machining position on the inner side of the workpiece, the third step-shaped spiral thread 22 is used for machining the machining position on the inner side of the workpiece, the K step-shaped spiral thread 2 is used for machining the machining position on the inner side of the workpiece, and so on until the inner wall of the workpiece 3 forms the inner raceway 30. Wherein the first step-shaped spiral line 20 is adjacent to the second step-shaped spiral line 21, the third step-shaped spiral line 22 is adjacent to the second step-shaped spiral line 21, and the K-th step-shaped spiral line 2 is adjacent to the K+1th step-shaped spiral line 2.
The machining position inside the workpiece varies along the radial direction inside the workpiece. For example, before the electrolytic machining, the machining position inside the workpiece is the inner wall inside the workpiece, and the bottom of the groove formed after the inner wall inside the workpiece is machined by the first step-shaped spiral line 20 is the new machining position inside the workpiece.
In some preferred embodiments, the spiral cathode body 1 comprises a shaft connection portion 10 and a spiral pattern arrangement portion 11, the shaft connection portion 10 being used for connecting a spindle 4 of an electrolytic machine tool, and the spiral pattern arrangement portion 11 being used for arranging and forming the stepped spiral pattern 2. Further, the shaft connecting part 10 and the screw thread setting part 11 are integrally connected, the shaft connecting part 10 is a cylinder, the screw thread setting part 11 is a cylinder, and the diameter of the shaft connecting part 10 is smaller than the diameter of the screw thread setting part 11.
In some preferred embodiments, in the N-step helical grooves, different step helical grooves have equal pitches, equal thread lengths, and are located on the same helical line.
In some preferred embodiments, the thread heights of different steps of the N steps of the step-shaped spiral lines are different, and the thread height of the spindle 4 of the electrolytic machine tool is higher when the direction of the spindle 4 of the electrolytic machine tool is taken as a reference.
In this embodiment, the height difference of the spiral lines is used to sequentially perform staged electrolytic machining from the radial direction of the machining position of the workpiece 3 according to the height order of the spiral lines, so that the inner race 30 with a desired depth can be efficiently and accurately machined. Meanwhile, since the stepped spiral threads 2 with different thread heights are all processing positions in the previous state, for example, the stepped spiral threads 2 with the first low thread height are spirally moved to the processing position on the inner side of the workpiece, a first-depth thread groove is generated by electrolysis along the radial direction of the surface processing position on the inner side of the workpiece, the stepped spiral threads 2 with the second low thread height are spirally moved to the first-depth thread groove, a second-depth thread groove is generated by electrolysis along the radial direction of the first-depth thread groove, and the stepped spiral threads 2 with the third low thread height are spirally moved to the second-depth thread groove, so that the stepped spiral threads 2 with different thread heights are prevented from mechanically colliding with the processing position on the inner side of the workpiece, and damaging the electrode and the workpiece 3.
In further preferred embodiments, the lengths of the threads of the different steps of the N steps of the step-shaped spiral threads are the same, the number of turns around the spiral cathode body 1 is the same, and the pitches 24 are the same. In this embodiment, because the lengths of the threads of the different sections of the N-section stepped spiral lines are the same, the number of circles around the spiral cathode body 1 is the same, and the pitches 24 are the same, the N-section stepped spiral lines can be uniformly controlled to move to the processing position inside the workpiece to perform staged radial electrolytic processing on the workpiece 3, so as to achieve fine and quantized electrolytic processing, and the inner raceway 30 is generated on the inner wall of the workpiece 3, thereby improving the precision and efficiency of electrolytic processing.
Example III
Referring to fig. 1-9, a stepped spiral electrode as described in any of the above embodiments may be assembled into an electrolyzer comprising:
a stepped spiral electrode as in any one of the embodiments above;
A main shaft 4 of the electrolytic machine tool is connected with the stepped spiral electrode and is used for controlling the stepped spiral electrode to move spirally to a processing position on the inner side of the workpiece;
and the sealing installation seat 5 is used for installing the workpiece 3 and the sealing liquid cover 6, and the sealing liquid cover 6 seals the workpiece 3 and the stepped spiral electrode in electrolyte.
The inner race 30 is a ring-shaped groove formed on the inner side of the workpiece, and the inner race 30 may be a thread groove, for example. The workpiece 3 may be a ring-shaped body, and the ring-shaped body includes an inner ring 31 and an outer ring 32, where the inner ring 31 is the inner side of the workpiece. The inner race 30 is formed on the side wall of the inner ring 31 of the annular body workpiece 3 by electrolytic machining.
In the prior art, there is a technique of machining a shape required for the workpiece 3 using a tapered spiral electrode, but the tapered spiral electrode is generally only capable of machining a shape of the workpiece 3 requiring low accuracy and is inefficient. The conical spiral electrode cannot meet the requirement that an inner race 30 with high accuracy requirements needs to be machined into the workpiece 3. In this embodiment, the stepped spiral thread 2 is disposed on the outer wall of the spiral cathode body 1, and before the electrolytic machining of the inner raceway 30 on the inner side of the workpiece, the stepped spiral thread 2 spirally moves to the machining position on the inner side of the workpiece to perform staged radial electrolytic machining on the workpiece 3, so that the inner raceway 30 is formed on the inner wall of the workpiece 3, and high-precision and high-efficiency electrolytic machining is realized.
The stepwise radial electrolytic machining of the workpiece 3 means the stepwise feature of the stepped spiral pattern 2, the machining position inside the workpiece is machined by the kth step spiral pattern 2, and the machining position inside the workpiece is machined by the kth+1th step spiral pattern 2, where K is a natural number equal to or greater than 2. The K-th step spiral pattern 2 is adjacent to the K+1th step spiral pattern 2. For example, the first step-shaped spiral thread 20 is used for machining the machining position on the inner side of the workpiece, the second step-shaped spiral thread 21 is used for machining the machining position on the inner side of the workpiece, the third step-shaped spiral thread 22 is used for machining the machining position on the inner side of the workpiece, the K step-shaped spiral thread 2 is used for machining the machining position on the inner side of the workpiece, and so on until the inner wall of the workpiece 3 forms the inner raceway 30. Wherein the first step-shaped spiral line 20 is adjacent to the second step-shaped spiral line 21, the third step-shaped spiral line 22 is adjacent to the second step-shaped spiral line 21, and the K-th step-shaped spiral line 2 is adjacent to the K+1th step-shaped spiral line 2.
The machining position inside the workpiece varies along the radial direction inside the workpiece. For example, before the electrolytic machining, the machining position inside the workpiece is the inner wall inside the workpiece, and the bottom of the groove formed after the inner wall inside the workpiece is machined by the first step-shaped spiral line 20 is the new machining position inside the workpiece.
It should be noted that, the sealing installation seat 5 may include a liquid inlet and a liquid outlet, where the liquid inlet and the liquid outlet are respectively disposed at two sides of the bottom of the sealing installation seat 5, the liquid inlet is connected with an electrolyte transmission system, and the electrolyte transmission system transmits the electrolyte from the liquid inlet to the sealing cover 6.
Example IV
Referring to fig. 1-9, the above-described electrolytic device may be applied to an electrolytic machine tool, which includes the electrolytic device described in the above-described embodiment, and thus has the characteristics of the stepped spiral electrode described in any of the above-described embodiments, and may be used to process a workpiece to generate an inner race.
The inner race 30 is a ring-shaped groove formed on the inner side of the workpiece, and the inner race 30 may be a thread groove, for example. The workpiece 3 may be a ring-shaped body, and the ring-shaped body includes an inner ring 31 and an outer ring 32, where the inner ring 31 is the inner side of the workpiece. The inner race 30 is formed on the side wall of the inner ring 31 of the annular body workpiece 3 by electrolytic machining.
In the prior art, there is a technique of machining a shape required for the workpiece 3 using a tapered spiral electrode, but the tapered spiral electrode is generally only capable of machining a shape of the workpiece 3 requiring low accuracy and is inefficient. The conical spiral electrode cannot meet the requirement that an inner race 30 with high accuracy requirements needs to be machined into the workpiece 3. In this embodiment, the stepped spiral thread 2 is disposed on the outer wall of the spiral cathode body 1, and before the electrolytic machining of the inner raceway 30 on the inner side of the workpiece, the stepped spiral thread 2 spirally moves to the machining position on the inner side of the workpiece to perform staged radial electrolytic machining on the workpiece 3, so that the inner raceway 30 is formed on the inner wall of the workpiece 3, and high-precision and high-efficiency electrolytic machining is realized.
The stepwise radial electrolytic machining of the workpiece 3 means the stepwise feature of the stepped spiral pattern 2, the machining position inside the workpiece is machined by the kth step spiral pattern 2, and the machining position inside the workpiece is machined by the kth+1th step spiral pattern 2, where K is a natural number equal to or greater than 2. The K-th step spiral pattern 2 is adjacent to the K+1th step spiral pattern 2. For example, the first step-shaped spiral thread 20 is used for machining the machining position on the inner side of the workpiece, the second step-shaped spiral thread 21 is used for machining the machining position on the inner side of the workpiece, the third step-shaped spiral thread 22 is used for machining the machining position on the inner side of the workpiece, the K step-shaped spiral thread 2 is used for machining the machining position on the inner side of the workpiece, and so on until the inner wall of the workpiece 3 forms the inner raceway 30. Wherein the first step-shaped spiral line 20 is adjacent to the second step-shaped spiral line 21, the third step-shaped spiral line 22 is adjacent to the second step-shaped spiral line 21, and the K-th step-shaped spiral line 2 is adjacent to the K+1th step-shaped spiral line 2.
The machining position inside the workpiece varies along the radial direction inside the workpiece. For example, before the electrolytic machining, the machining position inside the workpiece is the inner wall inside the workpiece, and the bottom of the groove formed after the inner wall inside the workpiece is machined by the first step-shaped spiral line 20 is the new machining position inside the workpiece.
The foregoing is a description of the embodiments of the present invention, and is not to be construed as limiting the invention, since modifications in the detailed description and the application scope will become apparent to those skilled in the art upon consideration of the teaching of the embodiments of the present invention.
Claims (9)
1. An electrolytic machining method for an inner raceway of a workpiece, comprising the steps of:
assembling the workpiece on the mounting seat, sealing the workpiece by using a sealing liquid cover, sealing flowing electrolyte in the sealing liquid cover, immersing the workpiece, sealing the flowing electrolyte in the sealing liquid cover, and immersing the workpiece;
The manufacturing method comprises the steps of manufacturing a stepped spiral electrode, wherein the manufactured stepped spiral electrode comprises a spiral cathode body and stepped spiral lines, wherein the inside of the spiral cathode body is used for conducting current, the stepped spiral lines are formed on the outer wall of the spiral cathode body and are electrically communicated with the inside of the spiral cathode body, the stepped spiral lines spirally move to a machining position on the inner side of a workpiece before electrolytic machining of an inner raceway on the inner side of the workpiece, the spiral cathode body comprises a shaft connecting part and a spiral line setting part, the shaft connecting part is used for connecting a main shaft of an electrolytic machine tool, the spiral line setting part is used for setting and forming the stepped spiral lines, the shaft connecting part is integrally connected with the spiral line setting part, the shaft connecting part is a cylinder, and the diameter of the shaft connecting part is smaller than that of the spiral line setting part;
the stepped spiral electrode comprises N sections of stepped spiral lines, wherein the thread height of a K-th stepped spiral line is smaller than that of a K+1th stepped spiral line, K is a natural number larger than or equal to 1, the thread pitches of different sections of stepped spiral lines are equal, the thread lengths of the different sections of stepped spiral lines are equal and are positioned on the same spiral line, the thread heights of different sections of stepped spiral lines in the N sections of stepped spiral lines are different, and the thread height of a spindle closer to an electrolytic machine tool is higher with reference to the direction of the spindle closer to the electrolytic machine tool;
And assembling the stepped spiral electrode to a main shaft of an electrolytic machine tool, and controlling the main shaft of the electrolytic machine tool to drive stepped spiral lines with different thread heights in the N sections of stepped spiral lines to carry out radial electrolytic machining at machining positions on the inner side of a workpiece according to the sequence from small thread heights to large thread heights so as to generate an inner raceway on the inner wall of the workpiece, wherein the inner raceway is a ring-shaped structural groove formed on the inner side of the workpiece.
2. The electrolytic machining method for the inner raceway of the workpiece according to claim 1, wherein when N is equal to 3, the spindle of the electrolytic machine tool is controlled to drive the 1 st, 2 nd and 3 rd low step spiral threads of the 3-section step spiral threads to sequentially carry out radial electrolytic machining at machining positions on the inner side of the workpiece so as to generate the inner raceway on the inner wall of the workpiece.
3. The electrolytic machining method of an inner raceway of a workpiece according to claim 2, wherein controlling the spindle of the electrolytic machine tool to drive the 1 st, 2 nd and 3 rd low step-shaped helical threads of the 3 rd step-shaped helical threads to sequentially perform radial electrolytic machining at machining positions inside the workpiece to generate the inner raceway on the inner wall of the workpiece comprises:
controlling a main shaft of the electrolytic machine tool to drive the step-shaped spiral threads with the 1 st low thread height in the 3 steps of step-shaped spiral threads to move to the inner wall of the inner side of the workpiece, and electrolytic machining a1 st depth groove at a machining position of the inner wall of the inner side of the workpiece;
Controlling a main shaft of the electrolytic machine tool to drive a step-shaped spiral groove with the 2 nd low thread height in 3 steps of step-shaped spiral grooves to be gradually formed into a1 st depth groove, and electrolytic machining the 2 nd depth groove at a radial machining position of the 1 st depth groove;
and controlling a main shaft of the electrolytic machine tool to drive the 3 rd low-height stepped spiral groove in the 3 rd stepped spiral groove to be spirally progressive to the 2 nd low-depth groove, and electrolytic machining the 3 rd depth groove at the radial machining position of the 2 nd low-depth groove.
4. The electrolytic machining method for the inner raceway of the workpiece according to claim 3, wherein when the workpiece is located below the stepped spiral electrode before machining is started, controlling the spindle of the electrolytic machine tool to drive the stepped spiral with the 1 st low thread height of the 3-stage stepped spiral to move to the inner wall of the inner side of the workpiece comprises controlling the spindle of the electrolytic machine tool to drive the stepped spiral with the 1 st low thread height of the 3-stage stepped spiral to move downward to the inner wall of the inner side of the workpiece.
5. The electrolytic machining method for the inner raceway of the workpiece according to claim 3, wherein when the stepped spiral electrode is located inside the workpiece, controlling the spindle of the electrolytic machine tool to drive the stepped spiral groove with the 2 nd low thread height to spiral gradually to the 1 st deep groove comprises controlling the spindle of the electrolytic machine tool to drive the stepped spiral groove with the 2 nd low thread height to spiral gradually to the 1 st deep groove.
6. The electrolytic machining method for the inner raceway of the workpiece according to claim 3, wherein when the stepped spiral electrode is located inside the workpiece, controlling the spindle of the electrolytic machine tool to drive the 3 rd low stepped spiral groove in the 3 rd stepped spiral groove to spiral gradually to the 2 nd low depth groove comprises controlling the spindle of the electrolytic machine tool to drive the 3 rd low stepped spiral groove in the 3 rd stepped spiral groove to spiral gradually to the 2 nd depth groove.
7. A method of electrochemical machining of an inner race of a workpiece according to any one of claims 1 to 6, wherein sealing the flowing electrolyte within the enclosure and immersing the workpiece comprises:
connecting an electrolyte transmission system with a liquid inlet of the mounting seat, wherein the liquid inlet is communicated with the liquid sealing cover;
and controlling the electrolyte conveying system to convey flowing electrolyte to the liquid inlet, sealing the flowing electrolyte in the liquid sealing cover, and immersing the workpiece.
8. The method of electrochemical machining of an inner race of a workpiece according to any one of claims 1 to 6, characterized in that the workpiece is a ring-shaped body comprising an inner ring and an outer ring, the inner ring being inside the workpiece.
9. The electrolytic processing method for an inner race of a workpiece according to any one of claims 1 to 6, characterized in that the inner race is a thread groove.
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| JP2001198734A (en) * | 2000-01-11 | 2001-07-24 | Nippon Densan Corp | Electrode body for electrochemical machining |
| US7192260B2 (en) * | 2003-10-09 | 2007-03-20 | Lehr Precision, Inc. | Progressive cavity pump/motor stator, and apparatus and method to manufacture same by electrochemical machining |
| CN101554670A (en) * | 2008-04-08 | 2009-10-14 | 张建 | Electric spark tapping machine |
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| JP6011242B2 (en) * | 2012-10-23 | 2016-10-19 | 大信精機株式会社 | Electrolytic processing equipment |
| CN106808038A (en) * | 2015-12-02 | 2017-06-09 | 财团法人金属工业研究发展中心 | Electrochemical machining device and machining method |
| CN111438411B (en) * | 2020-04-21 | 2021-04-13 | 南京浦航机械科技开发有限公司 | Electrolytic machining clamp for chamfering of mobile phone lens bracket group and technological method thereof |
| CN111618384B (en) * | 2020-06-05 | 2021-08-27 | 南京工业大学 | Threaded pipe electrode matching internal and external flushing electric spark-electrolysis combined hole making method |
| CN215468610U (en) * | 2021-07-07 | 2022-01-11 | 深圳市星宏精密电解科技有限公司 | Six-shaft multipurpose precision electrolytic machining tool |
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| CN212885536U (en) * | 2020-08-31 | 2021-04-06 | 西安工业大学 | Small-caliber complex internal helical vertical electrolytic machining machine |
| CN114749739A (en) * | 2022-04-08 | 2022-07-15 | 南京航空航天大学 | Device and method for machining turbine disc mortise through pulsating precision electrolytic broaching |
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