CN222971688U

CN222971688U - On-machine measuring equipment suitable for processing large-scale deep blind hole

Info

Publication number: CN222971688U
Application number: CN202420782201.0U
Authority: CN
Inventors: 王晓兵; 王国营; 刘冬洋; 王秦伟; 钟家坪; 汪学斌; 周浩; 李亚飞; 朱萌萌; 郝传华; 刘�文; 马文兵
Original assignee: Hubei Sanjiang Space Xianfeng Electronic&information Co ltd
Current assignee: Hubei Sanjiang Space Xianfeng Electronic&information Co ltd
Priority date: 2024-04-16
Filing date: 2024-04-16
Publication date: 2025-06-13
Anticipated expiration: 2034-04-16

Abstract

The utility model discloses on-machine measuring equipment suitable for processing a large deep blind hole, which belongs to the field of processing equipment, and is characterized in that a measuring component is arranged for a cutter bar, and the inner diameter of the large deep blind hole in the opposite direction of a corresponding measuring point is measured respectively by utilizing the combined arrangement of a ball measuring module and a point light source module, so that the inner diameter measuring value of the measuring point is obtained, and the on-machine measurement of the inner diameter of the large deep blind hole is realized. The on-machine measuring equipment suitable for processing the large deep blind hole has the advantages that the structure is simple, the operation is convenient, the existing machine tool structure can be effectively utilized, the on-machine measurement of the large blind hole workpiece can be realized only by simply modifying the existing machine tool structure, the secondary clamping and positioning of the workpiece caused by measurement are avoided, the accuracy and the efficiency of inner diameter measurement in the processing process of the large deep blind hole workpiece are improved, the guarantee is provided for the final finish machining efficiency and the final finish machining accuracy of the workpiece, the machining cost and the application cost of the large deep blind hole workpiece are reduced, and the on-machine measuring equipment has good economic value and practical value.

Description

On-machine measuring equipment suitable for processing large-scale deep blind hole

Technical Field

The utility model belongs to the field of processing equipment, and particularly relates to on-machine measuring equipment suitable for processing large deep blind holes.

Background

In the technical field of machining, machining of a workpiece with a large deep blind hole is frequently encountered, and when the workpiece is machined, clamping accuracy in the machining process of the workpiece is required to be strictly ensured in order to ensure that the machining accuracy of the large deep blind hole meets the requirements of actual design.

However, in the actual machining process, operators find that the clamping precision of a large workpiece is difficult to ensure, the workpiece main shaft and the machining Z axis are difficult to ensure to be uniform, and the deflection between the workpiece main shaft and the machining Z axis often exceeds 0.1mm. Along with the increase of the length of the workpiece, the offset between the workpiece main shaft and the Z axis of processing becomes larger and larger, so that the processing error is further increased, the processing of the workpiece cannot meet the requirements of practical application, and great processing defects exist.

Disclosure of utility model

Aiming at one or more of the defects or improvement requirements of the prior art, the utility model provides on-machine measuring equipment suitable for processing a large deep blind hole, which can realize on-machine measurement after workpiece processing while meeting the processing requirement of the large deep blind hole of a workpiece, ensure the accuracy of workpiece measurement and improve the efficiency of measuring the workpiece of the large deep blind hole.

In order to achieve the above purpose, the utility model provides an on-machine measuring device suitable for processing large deep blind holes, which comprises a chuck for clamping one end of a workpiece and a center frame for clamping the other end of the workpiece, wherein one end of the center frame, which is away from the chuck, is provided with a displacement processing assembly for driving a cutter bar to reciprocate in an XZ plane;

a measuring component is also arranged corresponding to the cutter bar;

The measuring assembly comprises a ball measuring module and a point light source module, wherein the ball measuring module can be assembled and connected to a knife handle at the end part of the knife rod, the point light source module is arranged on the peripheral wall surface of the end part of the knife rod, and the ball measuring module assembled behind the knife handle is positioned at one side of the axis of the knife rod, which is far away from the point light source module.

As a further improvement of the utility model, the ball measuring module and the point light source module which are assembled behind the knife handle are positioned in the same XZ plane passing through the axis of the knife bar.

As a further improvement of the utility model, the point light source module comprises a point light source, a sealing cover plate and a driving assembly;

The point light source and the driving assembly are respectively embedded in holes formed in the end part of the cutter bar, and the sealing cover plate is assembled with the driving assembly, so that the position of the sealing cover plate is changed through the driving assembly, the sealing cover plate can seal the point light source in the corresponding holes when the point light source does not work, and the sealing of the point light source is released when the point light source works.

As a further improvement of the present utility model, the drive assembly includes a slide pin, a spiral groove disk, and a control motor;

The sliding pin is connected with one end of the sealing cover plate, the sliding pin is assembled with the spiral groove disc, and the spiral groove disc is connected with the output end of the control motor, so that the control motor can drive the sealing cover plate to reciprocate in translation through the spiral groove disc.

As a further improvement of the utility model, the center frame comprises an annular bracket and at least three action units which are arranged on the annular bracket at intervals along the circumferential direction;

the at least three action units can respectively reciprocate along the radial direction of the annular support to abut against at least three points of the periphery of the workpiece.

As a further improvement of the utility model, the three action units comprise a pressing and holding unit positioned at the top of the annular bracket and two supporting units positioned at two sides of the annular bracket, wherein the two supporting units can be respectively abutted against two side wall surfaces of the workpiece, and the pressing and holding unit can be abutted against the top of the workpiece and can press the workpiece on the two supporting units.

As a further improvement of the utility model, the pressing part of the pressing unit is connected to a telescopic mechanism driven by an air cylinder or a hydraulic cylinder;

And/or

The support part of the support unit is connected to a screw rod structure driven by a servo motor.

As a further improvement of the utility model, the bottom assembly of the center frame is arranged on a guide rail extending along the Z axis in the displacement processing assembly, and can carry out reciprocating displacement in the Z axis direction under the guidance of the guide rail.

As a further improvement of the utility model, the displacement processing assembly comprises a cutter bar seat and a carriage which are arranged corresponding to the guide rail;

The cutter bar is arranged on the cutter bar seat in a penetrating way, the bottom of the cutter bar seat is connected with the carriage, an X-axis displacement mechanism is arranged at the bottom of the carriage, and a Z-axis sliding mechanism is arranged between the X-axis displacement mechanism and the guide rail.

The above-mentioned improved technical features can be combined with each other as long as they do not collide with each other.

In general, the above technical solutions conceived by the present utility model have the beneficial effects compared with the prior art including:

(1) The on-machine measuring equipment suitable for processing the large deep blind hole is obtained by simply modifying the existing machine tool, the measuring assembly is arranged for the cutter bar, the combined arrangement of the ball measuring module and the point light source module in the measuring assembly is utilized to respectively measure the inner diameters of the large deep blind hole in the opposite directions of the corresponding measuring point, so that the inner diameter measuring value of the measuring point is obtained, the on-machine measurement of the inner diameter of the large deep blind hole is effectively realized, the inner diameter measuring precision in the processing process of a large deep blind hole workpiece is ensured, the convenience and the efficiency of the inner diameter measuring are improved, and the guarantee is provided for the processing precision of the workpiece.

(2) The on-machine measuring equipment suitable for processing the large deep blind holes effectively ensures the reliability and the accuracy of the on-machine measuring equipment setting and application and ensures the on-machine measuring process of the on-machine measuring equipment to be accurately and reliably carried out through the optimal design of the specific structures of the center frame and the point light source module.

(3) The on-machine measuring equipment suitable for processing the large deep blind hole has the advantages that the structure is simple, the operation is convenient, the existing machine tool structure can be effectively utilized, the on-machine measurement of the large blind hole workpiece can be realized only by simply modifying the existing machine tool structure, the secondary clamping and positioning of the workpiece caused by measurement are avoided, the accuracy and the efficiency of inner diameter measurement in the processing process of the large deep blind hole workpiece are improved, the guarantee is provided for the final finish machining efficiency and the final finish machining accuracy of the workpiece, the machining cost and the application cost of the large deep blind hole workpiece are reduced, and the on-machine measuring equipment has good economic value and practical value.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 and fig. 2 are schematic structural diagrams of a large-scale deep blind hole processing device based on-machine measurement in an embodiment of the utility model;

FIG. 3 is a schematic diagram of a center frame structure of a large-scale deep blind hole processing device in an embodiment of the utility model;

FIG. 4 is a schematic diagram of a measuring assembly of a large-scale deep blind hole processing device according to an embodiment of the present utility model;

Like reference numerals denote like technical features throughout the drawings, in particular:

1. A chuck; 2, a displacement processing assembly, 3, a center frame, 4, a measuring assembly, 5, a workpiece;

201. 202, a cutter bar, 203, a carriage, 204, a guide rail, 205 and a cutter handle;

301. An annular bracket; 302, a pressing and holding unit 303, a supporting unit;

401. The device comprises a ball measuring module, a point light source module, a 4021, a point light source, a 4022, a sealing cover plate, a sliding pin, a 4024, a spiral groove disc and a control motor.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples:

Referring to fig. 1 and 2, in the present utility model, XYZ axis coordinates are constructed for the apparatus and the workpiece 5, wherein the longitudinal direction of the machine tool (the axial direction corresponding to the workpiece 5) is the Z axis, the horizontal direction perpendicular to the Z axis is the X axis, and the vertical direction perpendicular to the Z axis is the Y axis.

Specifically, the on-machine measuring device suitable for processing large deep blind holes in the preferred embodiment is shown in fig. 1, which is obtained by modifying an existing machine tool for processing large deep blind holes on long-axis workpieces, and comprises a machine box positioned at one end of the machine tool, wherein one side of the machine box along the Z-axis direction is provided with a chuck 1, a control mechanism of the chuck 1 is arranged in the machine box, and the chuck 1 can be opened or locked under the control of the control mechanism.

By means of the arrangement of the chuck 1, a reliable clamping of one end of the workpiece 5 to be machined can be achieved.

Correspondingly, a center frame 3 is provided corresponding to the fixation and clamping of the other end of the workpiece 5. For the center frame in the preferred embodiment, it includes an annular bracket 301 having a through hole, the bottom of the annular bracket 301 being fixedly disposed or displaceably disposed.

In a preferred embodiment, to facilitate loading and unloading of the workpiece 5 to be processed, the annular support 301 is provided in a displaceable manner, and the bottom of the annular support is connected to the guide rail 204 extending along the Z axis in an assembled manner, and can reciprocate along the Z axis under the guidance of the guide rail 204.

Meanwhile, in order to support and fix the workpiece 5 by the annular support 301, at least three action units capable of reciprocating displacement along the radial direction of the annular support 301 are arranged on the annular support 301 at intervals along the annular direction, and the action units are abutted against at least three points on the periphery of the workpiece 5, so that the workpiece 5 is clamped and fixed.

In the preferred embodiment shown in fig. 3, the acting units on the ring-shaped support 301 are 3 supporting units 303 distributed on two sides of the ring-shaped support 301 and pressing units 302 located on the top of the ring-shaped support 301, two sides of the workpiece 5 are respectively supported by the two supporting units 303, and then the top of the workpiece 5 is pressed by the pressing units 302, so that the workpiece 5 is reliably pressed on the two supporting units 303 by the pressing units 302.

In a preferred embodiment, 3 active units are arranged at equal intervals, with an angle of 120 ° each to the other.

More specifically, for the action unit in the preferred embodiment, the support portion of the support unit 303 is preferably connected to a screw structure driven by a servo motor, and by forward and reverse driving of the servo motor, the support portion can reciprocate in the radial direction, so that the position of the support portion can be adjusted, and the position state of the workpiece 5 after clamping can be changed.

Meanwhile, the pressing portion of the pressing unit 302 in the preferred embodiment is preferably connected to a telescopic mechanism driven by an air cylinder or a hydraulic cylinder, for example, in the preferred embodiment shown in fig. 3, the pressing unit 302 is a hydraulic mechanism including a hydraulic cylinder, and the lifting control of the pressing portion can be achieved by the control of the hydraulic cylinder, so that one end of the workpiece 5 supported in place is pressed and fixed.

In actual use, one end of the workpiece 5 is clamped by the chuck 1, and then the other end of the workpiece 5 is fixed by the center frame 3, after the clamping of the chuck 1 is completed, the clamping state of the workpiece 5 can be correspondingly changed through the adjustment of the two supporting units 303 on the center frame 3, and the levelness (whether the heights of the Y-axis at the two ends of the workpiece 5 are the same) and the coaxiality (the parallelism degree of the axial direction and the Z-axis direction of the workpiece 5) of the workpiece 5 can be adjusted.

In the conventional machining process, the levelness of the workpiece 5 is easy to measure and maintain, and the Y-axis height of one end clamped by the center frame 3 can be accurately adjusted to be identical to the Y-axis height of one end clamped by the chuck 1. However, the coaxiality of the workpiece 5 is difficult to accurately measure and maintain, so that a plane offset exists during processing of the workpiece 5, and the processing quality of the workpiece 5 is affected.

For the on-machine measuring device in the preferred embodiment, the purpose of the design is to realize the offset during rough machining of the workpiece 5, so as to provide accurate basis for adjusting the coaxiality of the workpiece 5 and further provide guarantee for the finish machining of the subsequent workpiece 5.

Further, for the workpiece 5 clamped on the chuck 1 and the center frame 3 correspondingly, the machine tool further comprises a displacement machining assembly 2 arranged on one side, away from the chuck 1, of the center frame 3, the displacement machining assembly 2 comprises a cutter bar seat 201 arranged correspondingly to the guide rail 204 except for the guide rail 204 extending along the Z axis, the bottom of the cutter bar seat 201 is connected with a carriage 203, a through hole for connecting and arranging a cutter bar 202 is formed in the middle of the cutter bar seat 201, and the cutter bar 202 is arranged on the cutter bar seat 201 in a penetrating mode.

Meanwhile, the carriage 203 in the preferred embodiment is assembled and connected to the guide rail 204 through the X-axis displacement mechanism, so that the carriage 203 can reciprocate along the X-axis under the driving of the X-axis displacement mechanism, and further the X-axis positions of the carriage 203 and the tool holder 201 on the carriage 203 are adjusted to adapt to different machining sizes of machining tools on the tool holder 202.

Corresponding to the fixing of the machining tool, a tool shank 205 is arranged at the end of the tool bar 202, and is quickly assembled and connected with the machining tool to be used, so that the deep blind hole machining of the workpiece 5 is completed.

It will be appreciated that a Z-axis sliding mechanism is provided between the X-axis displacement mechanism and the guide rail 204 in the preferred embodiment, for driving the carriage 203 to slide back and forth in the Z-axis direction under the guidance of the guide rail 204.

With the aforementioned machine tool, the machining requirements of the machine tool can be satisfied by attaching the machining tool assembly to the shank 205. On the basis of this, the preferred embodiment is further provided with a measuring assembly 4 to meet the on-machine measurement requirements of the machine tool.

The measuring assembly 4 in the preferred embodiment comprises a ball measuring module 401 which can be assembled and connected to the tool handle 205 and a point light source module 402 which is arranged on the outer wall surface of one side of the tool bar 202, which is away from the tool handle 205, and the diameter measurement of the corresponding measuring point in the blind hole can be independently completed by utilizing the respective arrangement of the ball measuring module 401 and the point light source module 402.

In the field of workpiece measurement, the above-mentioned manner of performing touch measurement by using a ball and the manner of performing non-contact measurement by using a point light source are respectively in the more mature prior art, for example, the manner of performing measurement by using a ball is described and applied in detail in the prior patent CN203579318U, CN203817886U, CN202180214U of the applicant, which is not described herein, while the manner of performing measurement by using a point light source is also in the more mature prior art, such as a laser ranging sensor, an infrared ranging sensor, and the like, which are not described herein. It is obvious that the two measurement techniques are not of interest in the present utility model, and are not described in detail here. The on-machine measuring equipment in the utility model focuses on the combined design and use of two technologies.

Further, to ensure accuracy of the measurement results of the two modules, in a preferred embodiment, the ball measurement module 401 and the point light source module 402 assembled on the tool shank 205 are located in the same XZ plane passing through the axis of the tool shank 202.

In more detail, for the integration of the point light source module 402 on the cutter bar 202, a preferred design is made in the preferred embodiment, as shown in fig. 4. A receiving hole for receiving the point light source 4021 and a mounting hole for mounting the mating device are formed on one side surface of the cutter bar 202. The point light source 4021 is embedded and installed in the accommodating hole, a control motor is arranged in the installing hole, an openable sealing cover plate 4022 is arranged at a position corresponding to the opening of the accommodating hole, a sliding pin 4023 is arranged at one end of the sealing cover plate 4022, a spiral groove disk 4024 is arranged at the output end corresponding to the control motor 4025, the sliding pin 4023 and the spiral groove disk 4024 are assembled, sliding control of the sliding pin 4023 can be achieved through control of the control motor 4025, and then the sealing cover plate 4022 is driven to reciprocate and translate, so that the state (initial state) of shielding the point light source 4021 is switched to the state (working state) far away from the point light source 4021.

Obviously, the above-mentioned related fittings corresponding to the point light source 4021 mainly play a role of sealing and protecting the point light source 4021, especially when the cutter bar 202 plays a role of sealing and protecting the point light source 4021 in processing operation. The structure of the above-mentioned closed protection can be set to other forms according to the actual setting requirement, can be an automatic opening and closing control mode, can also be a manual opening and closing control mode, and will not be described here.

Based on the foregoing settings and improvements regarding the machine tool structure, the machine tool structure in the preferred embodiment is capable of completing on-machine measurements after rough machining of large deep blind holes while satisfying the requirements of machining large deep blind holes in the workpiece 5.

In order to ensure the accuracy of machining the workpiece 5, when the machine tool is used for machining a large deep blind hole, rough machining is preferably performed first and then finish machining is performed, and the on-machine measurement process of the large deep blind hole is performed after the rough machining is finished and before the finish machining is started, and an accurate basis is provided for adjusting the state position of the workpiece 5 before the finish machining according to the measurement result.

In actual use, for the on-machine measuring device for large deep blind holes in the preferred embodiment, the process in use is as follows:

After finishing rough machining of the workpiece 5, the cutter bar 202 is withdrawn from the workpiece 5, the cutter on the cutter handle 205 is taken down, the ball measuring module 401 is assembled and connected on the cutter handle 205, the ball measuring position in the ball measuring module 401 is adjusted, the ball measuring is ensured to be approximately in the same XZ plane with the point light source 4021, the ball measuring is positioned on one side of the axis of the cutter bar 202, which is far away from the point light source 4021, the ball measuring module 401 and the point light source module 402 can measure the inner diameter of the same point from the completely opposite directions, and after that, the inner diameters measured by the two modules are added, and half of the added result is the inner diameter measured value of the measuring point, so that the on-machine measurement of the large-scale deep blind hole is completed.

It should be noted that, in order to facilitate measurement of the two modules, the machine tool can be utilized to calibrate the two modules by using a three-axis coordinate system, or the coordinate system of the two module components can be measured and calibrated and measured respectively, which is not described herein.

The on-machine measuring equipment suitable for processing the large deep blind hole has the advantages that the structure is simple, the operation is convenient, the existing machine tool structure can be effectively utilized, the on-machine measurement of the large blind hole workpiece can be realized only by simply modifying the existing machine tool structure, the secondary clamping and positioning of the workpiece caused by measurement are avoided, the accuracy and the efficiency of inner diameter measurement in the processing process of the large deep blind hole workpiece are improved, the guarantee is provided for the final finish machining efficiency and the final finish machining accuracy of the workpiece, the machining cost and the application cost of the large deep blind hole workpiece are reduced, and the on-machine measuring equipment has good economic value and practical value.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the utility model and is not intended to limit the utility model, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. An on-machine measuring device suitable for processing large deep blind holes comprises a chuck for clamping one end of a workpiece and a center frame for clamping the other end of the workpiece, wherein one end of the center frame, which is away from the chuck, is provided with a displacement processing component for driving a cutter bar to reciprocate in an XZ plane,

A measuring component is also arranged corresponding to the cutter bar;

2. The on-machine measuring device suitable for large deep blind hole machining according to claim 1, wherein the ball measuring module assembled behind the tool handle and the point light source module are located in the same XZ plane passing through the axis of the tool bar.

3. The on-machine measurement device suitable for large-scale deep blind hole machining according to claim 2, wherein the point light source module comprises a point light source, a sealing cover plate and a driving assembly;

4. An on-machine measurement device adapted for large deep blind hole machining as claimed in claim 3, wherein the drive assembly includes a slide pin, a spiral fluted disc and a control motor;

5. The on-machine measurement device suitable for large deep blind hole machining according to claim 4, wherein the center frame comprises an annular bracket and at least three action units arranged on the annular bracket at intervals along the circumferential direction;

6. The on-machine measuring device suitable for machining of large deep blind holes according to claim 5, wherein the three action units comprise a pressing unit positioned at the top of the annular support and two supporting units positioned at two sides of the annular support, wherein the two supporting units can be respectively abutted against two side wall surfaces of the workpiece, and the pressing unit can be abutted against the top of the workpiece and can press the workpiece on the two supporting units.

7. The on-machine measuring device suitable for large-scale deep blind hole machining according to claim 6, wherein the pressing part of the pressing unit is connected to a telescopic mechanism driven by an air cylinder or a hydraulic cylinder;

And/or

8. The on-machine measurement device for machining large deep blind holes according to any one of claims 1 to 7, wherein the bottom assembly of the center frame is disposed on a guide rail extending along the Z axis in the displacement machining assembly, and is capable of performing reciprocating displacement in the Z axis direction under the guidance of the guide rail.

9. The on-machine measurement device suitable for large-scale deep blind hole machining according to claim 8, wherein the displacement machining assembly comprises a cutter bar seat and a carriage arranged corresponding to the guide rail;