CN111307374A - Dynamic balance adjusting method for main transmission mechanism of machine tool - Google Patents
Dynamic balance adjusting method for main transmission mechanism of machine tool Download PDFInfo
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- CN111307374A CN111307374A CN202010135435.2A CN202010135435A CN111307374A CN 111307374 A CN111307374 A CN 111307374A CN 202010135435 A CN202010135435 A CN 202010135435A CN 111307374 A CN111307374 A CN 111307374A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 238000011900 installation process Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 abstract description 7
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- 238000005299 abrasion Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/30—Compensating imbalance
- G01M1/32—Compensating imbalance by adding material to the body to be tested, e.g. by correcting-weights
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining imbalance
- G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
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Abstract
The invention discloses a dynamic balance adjusting method for a main transmission mechanism of a machine tool, which consists of a main servo motor and a synchronous belt pulley. Pre-drilling a certain number of threaded holes in the front end surface and the rear end surface of the belt pulley; three non-contact sensors are respectively arranged on the end surface of the tail part of the motor, the front end surface and the rear end surface of the belt pulley, the unbalance amount of the main transmission mechanism of the numerical control machine tool is acquired corresponding to the rotating speed of the motor, and the unbalance amount and the position are determined; fixing balancing weights in pre-drilled threaded holes on the front end surface and the rear end surface of the belt pulley to perform dynamic balance correction; and detecting the integral dynamic balance precision of the adjusted main transmission mechanism by non-contact sensors on the front end surface of the belt pulley and the tail end surface of the main motor. The invention realizes the integral dynamic balance operation of the main transmission mechanism of the numerical control machine tool by combining the dynamic balance adjustment of the double-sided counterweight of the single part and the verification of the dynamic balance of the integral part, has simple process, can effectively save the cost, improves the integral precision of the main transmission mechanism of the machine tool and has high reliability.
Description
Technical Field
The invention relates to the technical field of dynamic balance of a main transmission mechanism of a machine tool, in particular to a dynamic balance adjusting method of the main transmission mechanism of the machine tool.
Background
At present, a servo motor is mostly adopted for driving a belt pulley to drive a main shaft to rotate, a transmission mechanism consisting of the servo motor and the belt pulley is a core part of the machine tool, and the precision and the integral processing quality of a final workpiece are related.
When the motor runs at a high speed, if the rotor of the motor has unbalance, the rotor can vibrate transversely, so that the rotor is subjected to additional dynamic load, and the additional dynamic load is larger when the rotating speed is higher. Although the servo motor is subjected to strict vibration test and dynamic balance correction when being shipped from a factory, after additional parts such as belt pulleys are mounted on a motor rotating shaft in a mode such as key matching, the original dynamic balance of the motor can be damaged by a transmission mechanism, so that centrifugal force is generated when the motor rotates at high speed, vibration of the rotating shaft is caused, noise is generated, finally, abrasion of a bearing is accelerated, machining precision is affected, and the overall performance of a machine tool is reduced. Therefore, a good dynamic balance performance is required for the main transmission mechanism of the machine tool.
At present, a weight-removing method is mostly adopted to carry out dynamic balance correction on a machine tool transmission mechanism with a belt pulley mounted on an output shaft of a servo motor. And after determining the unbalance amount and the position on the two correction surfaces according to a double-sided dynamic balance test method, respectively eliminating the unbalance force on the first correction surface and the second correction surface by drilling and removing the weight. However, the structure of the motor can be damaged in the mode, the structural rigidity of the motor is influenced, the dynamic balance adjusting time is long, and the production efficiency is influenced.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the main transmission mechanism of the machine tool, the belt pulley of the main transmission mechanism is pre-drilled, and then the balancing weight is added to eliminate the eccentric force, so that the dynamic balance adjustment of the main transmission mechanism of the machine tool is realized.
The technical scheme is as follows: the invention is realized by the following technical scheme: a dynamic balance adjusting method for a main transmission mechanism of a machine tool is disclosed, wherein the main transmission mechanism of the machine tool consists of a main servo motor and a synchronous belt pulley, and comprises the following steps:
step 1, pre-drilling a certain number of pre-drilled threaded holes in the front end face of a belt pulley to be assembled, and pre-drilling a certain number of pre-drilled threaded holes in the rear end face of the belt pulley to be assembled;
step 4, sampling in real time through a non-contact sensor corresponding to the rotating speed of a motor rotating shaft, collecting radial vibration information of the front end face and the rear end face of the belt pulley, feeding back the information to an upper computer for analyzing data, and determining the amount and the position of unbalance;
and 6, repeating the step 3 after the adjustment is finished, acquiring radial vibration signals of the front end face of the belt pulley and the tail end face of the motor through the non-contact sensor, and feeding back the radial vibration signals to an upper computer for analyzing data so as to confirm that the integral dynamic balance precision of the transmission mechanism meets the requirement.
Further, in the step 1, the number of the belt pulley front end surface pre-drilled threaded holes and the number of the belt pulley rear end surface pre-drilled threaded holes of the belt pulley should be even.
Furthermore, in the step 1, the positions of the belt pulley front end surface pre-drilled threaded hole and the belt pulley rear end surface pre-drilled threaded hole of the belt pulley are symmetrically and uniformly distributed with the axis of the belt pulley.
Further, in the step 1, the belt pulley front end face pre-drilled threaded hole and the belt pulley rear end face pre-drilled threaded hole of the belt pulley are drilled with a certain depth only on the end faces of the two sides of the belt pulley respectively, and are not communicated.
Furthermore, in step 2, a certain distance L should be reserved between the rear end face of the belt pulley and the front end face of the motor in the installation process, so that the balancing weight can be conveniently fixed in a pre-drilled threaded hole in the rear end face of the belt pulley in the later period.
Has the advantages that: the belt pulley to be installed in a main transmission mechanism of a machine tool is provided with a certain number of threaded holes on the front end surface and the rear end surface in advance, and then is installed on a rotating shaft of a main servo motor to perform dynamic balance precision detection; three non-contact sensors are respectively arranged on the end surface of the tail part of the motor, the front end surface and the rear end surface of the belt pulley, the sensors sample in real time corresponding to the rotating speed of a rotating shaft of the motor, and the unbalance information of a main transmission mechanism of the machine tool is collected; feeding back radial vibration signals of the front end surface and the rear end surface of the belt pulley and the rotating speed of the main shaft to an upper computer, and determining the unbalance amount and the corresponding position according to a biplane dynamic balance calculation method; then, fixing a proper balancing weight in the reserved threaded hole according to an analysis result to adjust the unbalanced force; and detecting the integral dynamic balance precision of the main transmission mechanism by non-contact sensors on the front end surface of the belt pulley and the tail end surface of the main motor. Finally, the aim of finishing the whole dynamic balance adjustment of the transmission mechanism on the premise of not damaging the structure of the main servo motor is fulfilled.
The invention has simple process, can effectively save cost, improves the integral precision of the main transmission mechanism of the machine tool and has high reliability.
Drawings
FIG. 1 is a schematic diagram of a dynamic balance correction surface adjustment;
FIG. 2 is a schematic view of pre-drilling threaded holes in the front and rear end faces of a pulley;
FIG. 3 is a schematic diagram of the dynamic balance adjustment of the main transmission mechanism of the machine tool according to the present invention;
fig. 4 is a flow chart of dynamic balance adjustment according to the present invention.
Wherein 1 is a pulley; 2 is a main servo motor; 3, pre-drilling a threaded hole on the front end surface of the belt pulley; 4, pre-drilling a threaded hole on the rear end face of the belt pulley; 5 is a keyless bushing; 6 is a counterweight; and 7 is a motor rotating shaft.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below to enable those skilled in the art to better understand the advantages and features of the present invention, so as to define the protection scope of the present invention more clearly. The embodiments described herein are only a few embodiments of the present invention, rather than all embodiments, and all other embodiments that can be derived by one of ordinary skill in the art without making any creative effort based on the embodiments of the present invention belong to the protection content of the present invention.
Examples
As shown in figure 1, the main transmission mechanism of a certain machine tool consists of a main servo motor and a key-free synchronous belt pulley. The dynamic balance adjusting method comprises the following steps:
step 1, as shown in fig. 2, a belt pulley 1 to be assembled is pre-drilled with a certain number of belt pulley front end surface pre-drilled threaded holes 3 on the front end surface, and a certain number of belt pulley rear end surface pre-drilled threaded holes 4 on the rear end surface. The number of the belt pulley front end surface pre-drilled threaded holes 3 and the belt pulley rear end surface pre-drilled threaded holes 4 of the belt pulley 1 is even; the positions of a belt pulley front end surface pre-drilled threaded hole 3 and a belt pulley rear end surface pre-drilled threaded hole 4 of the belt pulley 1 are symmetrical and uniformly distributed with the axis of the belt pulley 1; the belt pulley front end surface pre-drilling threaded hole 3 and the belt pulley rear end surface pre-drilling threaded hole 4 of the belt pulley 1 are drilled with a certain depth only on the end surfaces of two sides of the belt pulley 1 respectively and are not communicated.
And 3, detecting the main transmission structure provided with the adjusted belt pulley 1 by using a double-sided dynamic balance analyzer.
And 4, sampling in real time through a non-contact sensor corresponding to the rotating speed of the motor rotating shaft 7, collecting radial vibration information of the front end surface and the rear end surface of the belt pulley 1, feeding back the information to an upper computer for analyzing data, and determining the unbalance amount and the position.
And 5, as shown in fig. 3, selecting hole sites to fix the balancing weights 6 with corresponding weights in the belt pulley front end surface pre-drilled threaded holes 3 and the belt pulley rear end surface pre-drilled threaded holes 4 of the belt pulley 1 according to data results obtained by the analysis of the upper computer.
And 6, as shown in fig. 4, repeating the step 3 after the adjustment is finished, acquiring radial vibration signals of the front end surface of the belt pulley and the tail end surface of the motor through the non-contact sensor, and feeding back the radial vibration signals to an upper computer for analyzing data so as to confirm that the integral dynamic balance precision of the transmission mechanism meets the requirement.
Specifically, the dynamic balance adjustment of the whole transmission mechanism is finally completed on the premise of not damaging the structure of the main servo motor 2.
The invention provides a method for adjusting the dynamic balance of a main transmission mechanism of a machine tool, which is suitable for adjusting the dynamic balance of the transmission mechanism of the machine tool, and the specific implementation is not limited to only the description. Any simple modifications or substitutions made without departing from the spirit and method of the present invention should be considered within the scope of the present invention.
Claims (5)
1. A dynamic balance adjusting method for a main transmission mechanism of a machine tool is characterized in that the main transmission mechanism of the machine tool consists of a main servo motor and a synchronous belt pulley, and the method comprises the following steps: the method comprises the following steps:
step 1, pre-drilling a certain number of pre-drilled threaded holes (3) on the front end face of a belt pulley (1) to be assembled, and pre-drilling a certain number of pre-drilled threaded holes (4) on the rear end face of the belt pulley;
step 2, adjusting a screw of the key-free bushing (5) to complete the assembly of the belt pulley (1) and the main servo motor (2) and prepare for unbalance detection;
step 3, detecting the main transmission structure provided with the adjusted belt pulley (1) by using a double-sided dynamic balance analyzer;
step 4, sampling in real time through a non-contact sensor corresponding to the rotating speed of the motor rotating shaft (7), collecting radial vibration information of the front end face and the rear end face of the belt pulley (1), feeding back the information to an upper computer for analyzing data, and determining the unbalance amount and the position;
step 5, selecting hole sites to fix balancing weights (6) with corresponding weights in a belt pulley front end surface pre-drilled threaded hole (3) and a belt pulley rear end surface pre-drilled threaded hole (4) of a belt pulley (1) according to a data result obtained by analysis of an upper computer;
and 6, repeating the step 3 after the adjustment is finished, acquiring radial vibration signals of the front end face of the belt pulley (1) and the tail end face of the motor through a non-contact sensor and feeding back the radial vibration signals to an upper computer for analyzing data so as to confirm that the integral dynamic balance precision of the transmission mechanism meets the requirement.
2. The method for adjusting the dynamic balance of the main transmission mechanism of the machine tool according to claim 1, wherein: in the step 1, the number of the belt pulley front end surface pre-drilled threaded holes (3) and the number of the belt pulley rear end surface pre-drilled threaded holes (4) of the belt pulley (1) are even numbers.
3. The method for adjusting the dynamic balance of the main transmission mechanism of the machine tool according to claim 1, wherein: in the step 1, the positions of the belt pulley front end surface pre-drilled threaded hole (3) and the belt pulley rear end surface pre-drilled threaded hole (4) of the belt pulley (1) are symmetrically and uniformly distributed with the axis of the belt pulley (1).
4. The method for adjusting the dynamic balance of the main transmission mechanism of the machine tool according to claim 1, wherein: in the step 1, the belt pulley front end face pre-drilling threaded hole (3) and the belt pulley rear end face pre-drilling threaded hole (4) of the belt pulley (1) are drilled with a certain depth only on the end faces of two sides of the belt pulley (1) respectively and are not communicated.
5. The method for adjusting the dynamic balance of the main transmission mechanism of the machine tool according to claim 1, wherein: in the step 2, a certain distance L is reserved between the rear end face of the belt pulley (1) and the front end face of the motor in the installation process, so that the balancing weight (6) is fixed in the pre-drilled threaded hole (4) of the rear end face of the belt pulley (1) in the later period.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010135435.2A CN111307374A (en) | 2020-03-02 | 2020-03-02 | Dynamic balance adjusting method for main transmission mechanism of machine tool |
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| CN202010135435.2A CN111307374A (en) | 2020-03-02 | 2020-03-02 | Dynamic balance adjusting method for main transmission mechanism of machine tool |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737223A (en) * | 2020-12-31 | 2021-04-30 | 江苏核电有限公司 | Dynamic balance weight angle positioning device suitable for main pump motor of nuclear power plant |
| CN112964907A (en) * | 2021-02-08 | 2021-06-15 | 水利部交通运输部国家能源局南京水利科学研究院 | Speed-adjustable low-speed high-precision flow speed calibration system in linear open trough and control method thereof |
| CN114109591A (en) * | 2021-10-21 | 2022-03-01 | 神龙汽车有限公司 | Imbalance debugging method for three-cylinder engine assembly |
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| JPH06126589A (en) * | 1992-10-21 | 1994-05-10 | Hitachi Seiko Ltd | Spindle of machine tool and its rotational balance regulating method |
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| CN107598222A (en) * | 2017-11-02 | 2018-01-19 | 李秀碧 | A kind of brake wheel hub automatic drilling duplicate removal dynamic balancing lathe |
| CN107621333A (en) * | 2017-09-30 | 2018-01-23 | 马鞍山马钢华阳设备诊断工程有限公司 | A kind of rotor scene dual-threshold detection calibrating installation for not dismantling test mass and method |
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2020
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Patent Citations (7)
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| CN1058096A (en) * | 1991-06-10 | 1992-01-22 | 浙江大学 | Method for testing dynamic balance of centrifugal blower at worksite |
| JPH06126589A (en) * | 1992-10-21 | 1994-05-10 | Hitachi Seiko Ltd | Spindle of machine tool and its rotational balance regulating method |
| CN2624508Y (en) * | 2003-06-02 | 2004-07-07 | 浙江武义洪帆电子机械设备有限公司 | Numerically controlled milling machine with dynamic balancing unbalance-ridding micro-motor rotor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737223A (en) * | 2020-12-31 | 2021-04-30 | 江苏核电有限公司 | Dynamic balance weight angle positioning device suitable for main pump motor of nuclear power plant |
| CN112964907A (en) * | 2021-02-08 | 2021-06-15 | 水利部交通运输部国家能源局南京水利科学研究院 | Speed-adjustable low-speed high-precision flow speed calibration system in linear open trough and control method thereof |
| CN112964907B (en) * | 2021-02-08 | 2021-12-28 | 水利部交通运输部国家能源局南京水利科学研究院 | A speed-adjustable linear open groove medium-low-speed high-precision flow rate calibration system and its control method |
| CN114109591A (en) * | 2021-10-21 | 2022-03-01 | 神龙汽车有限公司 | Imbalance debugging method for three-cylinder engine assembly |
| CN114109591B (en) * | 2021-10-21 | 2023-01-24 | 神龙汽车有限公司 | Three-cylinder engine assembly unbalance debugging method |
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