CN111266671B - Error compensation method for transmission chain of gear hobbing machine - Google Patents
Error compensation method for transmission chain of gear hobbing machine Download PDFInfo
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- CN111266671B CN111266671B CN202010130750.6A CN202010130750A CN111266671B CN 111266671 B CN111266671 B CN 111266671B CN 202010130750 A CN202010130750 A CN 202010130750A CN 111266671 B CN111266671 B CN 111266671B
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- workbench
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/10—Arrangements for compensating irregularities in drives or indexing mechanisms
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Abstract
The invention relates to an error compensation method for a gear hobbing machine transmission chain, and belongs to the technical field of machine tool transmission precision detection. The method comprises the following steps: synchronously measuring the error of a workbench transmission chain under the low-speed operation working condition by using a laser interferometer and a workbench encoder; correcting error data measured by a workbench encoder based on the error data measured by the laser interferometer; measuring the error of a transmission chain of the hob box and the workbench under the high-speed operation working condition by using a hob box encoder and a workbench encoder; combining the measurement error of the workbench encoder obtained in the second step with the hob box-workbench transmission chain error data measured in the previous step to obtain corrected final error data; generating a compensation file based on the final error data; and compensating the error of the transmission chain of the gear hobbing machine according to the compensation file. The compensation method does not need to disassemble the hob box and the workbench shell, is quick and efficient, and saves manpower; the detection precision of the workbench encoder is corrected through the laser interferometer, and the compensation is more accurate.
Description
Technical Field
The invention belongs to the technical field of machine tool transmission precision detection, and relates to a method for compensating errors of a transmission chain of a gear hobbing machine.
Background
The transmission precision of the machine tool is one of important factors influencing the machining precision, when a large error occurs in a transmission chain of the gear hobbing machine, the gear cutting precision is low, the rejection rate is high, and in order to improve the qualification rate of machined products and ensure the consistency and stability of the product quality, the error of the transmission chain of the gear hobbing machine needs to be detected and compensated.
Traditionally, the method for reducing the error of the transmission chain of the gear hobbing machine is to disassemble a hobbing cutter box and a workbench shell of the gear hobbing machine and check and modify the transmission system of the gear hobbing machine. The method not only delays construction period and production progress, is time-consuming and labor-consuming, but also increases labor cost of enterprises.
Disclosure of Invention
In view of the above, the invention aims to provide a universal and convenient method for compensating the error of a transmission chain of a hobbing machine, which can realize the error of the transmission chain of the hobbing machine under the working conditions of low-speed and high-speed cutting without disassembling a hobbing cutter box and a workbench shell, improve the gear cutting precision of a machine tool, and solve the problems that the traditional method of overhauling after shell disassembly is time-consuming and labor-consuming, production is delayed, and labor cost is increased.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for compensating errors of a transmission chain of a gear hobbing machine comprises the following steps:
1. a method for compensating error of a transmission chain of a gear hobbing machine is characterized by comprising the following steps:
s1, operating a workbench of the gear hobbing machine at a low speed, and synchronously measuring transmission chain errors of the workbench by using a laser interferometer and a workbench encoder to obtain error data measured by the laser interferometer and error data measured by the workbench encoder;
s2, correcting the error data measured by the workbench encoder based on the error data measured by the laser interferometer to obtain the measurement error of the workbench encoder;
s3, operating the hob box and the workbench at a high speed, measuring by using a hob box encoder and a workbench encoder, and obtaining hob box-workbench transmission chain error data through a hob box-workbench transmission chain error detection program;
s4, combining the measurement error of the workbench encoder with the error data of the hob box-workbench transmission chain to obtain corrected final error data;
s5, generating a compensation file by a compensation program based on the final error data;
and S6, inputting the compensation file into a numerical control system of the gear hobbing machine to compensate the transmission chain error of the gear hobbing machine.
Further, in step S1, the laser interferometer and the stage encoder are connected to each other by a connection device and are mounted on the stage surface, so that the laser interferometer and the stage encoder perform synchronous measurement.
Furthermore, the connecting device between the laser interferometer and the workbench encoder comprises a connecting disc detachably connected below the laser interferometer, a transfer cap detachably connected below the connecting disc, and a workbench encoder tool detachably connected below the transfer cap; the workbench encoder is arranged on the workbench encoder tool.
Further, in step S3, the hob box encoder is disposed at the position of the hob box arbor through the hob box encoder tool.
And further, signals of the laser interferometer, the workbench encoder and the hob box encoder are subdivided through the subdivision box and transmitted into the data acquisition system to form corresponding measurement data.
The invention has the beneficial effects that:
(1) the invention can quickly and efficiently realize the detection and compensation of the error of the transmission chain of the hobbing machine under the working conditions of low speed and high speed cutting under the condition of not disassembling the hobbing cutter box and the working table shell of the hobbing machine, thereby improving the gear cutting precision of a machine tool, shortening the production period of the machine tool and saving the labor cost.
(2) The invention corrects the workbench transmission chain error measured by the workbench encoder under the low-speed operation working condition by using the high-precision measuring instrument of the laser interferometer to obtain the self measuring error of the workbench encoder, and obtains the final hob box-workbench transmission chain error by combining the error data measured by the hob box encoder and the workbench encoder through the error detection program under the high-speed operation working condition, thereby more accurately compensating the error.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is illustrated by the following drawings:
FIG. 1 is a flow chart of a method of compensating for errors in a drive chain of a gear hobbing machine according to the present invention;
fig. 2 is a schematic diagram of a system suitable for the error compensation method of the gear hobbing machine transmission chain provided by the invention.
Reference numerals: the device comprises a laser interferometer 1, a workbench encoder 2, a workbench transmission chain 3, a hob box encoder 4 and a hob box-workbench transmission chain 5.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
S1, operating a workbench of the gear hobbing machine at a low speed, and synchronously measuring errors of a transmission chain 3 of the workbench by using a laser interferometer 1 and a workbench encoder 2 to obtain error data measured by the laser interferometer 1 and error data measured by the workbench encoder 2;
preferably, in step S1, the laser interferometer 1 and the stage encoder 2 are connected by a connecting device and are mounted on the stage surface, so that the laser interferometer 1 and the stage encoder 2 can measure the error of the stage transmission chain 3 synchronously; the connecting device between the laser interferometer 1 and the workbench encoder 2 comprises a connecting disc detachably connected below the laser interferometer 1, a switching cap detachably connected below the connecting disc, and a workbench encoder tool detachably connected below the switching cap, wherein the workbench encoder 2 is arranged on the workbench encoder tool.
S2, correcting the error data measured by the workbench encoder 2 based on the error data measured by the laser interferometer 1 to obtain the measurement error of the workbench encoder 2;
s3, operating the hobbing cutter box and the workbench at a high speed, measuring by using a hobbing cutter box encoder 4 and a workbench encoder 2, and obtaining error data of a hobbing cutter box-workbench transmission chain 5 through an error detection program of a hobbing cutter box-workbench transmission chain 3; the hob box encoder 4 is arranged at the position of a hob rod of the hob box through a hob box encoder tool;
s4, combining the measurement error of the workbench encoder 2 with the error data of the hob box-workbench transmission chain 5 to obtain corrected final error data;
s5, generating a compensation file by a compensation program based on the final error data; the compensation program is written by MATLAB software;
and S6, inputting the compensation file into a numerical control system to compensate the error of the transmission chain of the gear hobbing machine.
According to the error compensation method for the transmission chain of the gear hobbing machine, manual disassembly of the hobbing cutter box and the workbench is not needed, error detection and compensation of the transmission chain of the gear hobbing machine are conveniently and rapidly achieved, and meanwhile labor is saved. In addition, the workbench encoder 2 is limited by self detection precision, the measured error data of the workbench transmission chain 3 has certain deviation with an actual value, in the error compensation method, the laser interferometer 1 with higher detection precision is used for correcting the error of the workbench transmission chain 3 measured by the workbench encoder 2 to obtain the self measurement error of the workbench encoder 2, and the self measurement error is combined with the error data obtained by the hob box encoder 4 and the workbench encoder 2 through a hob box-workbench transmission chain error detection program to obtain the final error of the hob box-workbench transmission chain 5, so that the error compensation method has more accurate compensation effect.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (3)
1. A method for compensating error of a transmission chain of a gear hobbing machine is characterized by comprising the following steps:
s1, operating a workbench of the gear hobbing machine at a low speed, and synchronously measuring transmission chain errors of the workbench by using a laser interferometer and a workbench encoder to obtain error data measured by the laser interferometer and error data measured by the workbench encoder; the laser interferometer and the workbench encoder are butted through a connecting device and are arranged on the surface of the workbench, so that the laser interferometer and the workbench encoder can measure synchronously; the connecting device comprises a connecting disc detachably connected below the laser interferometer, a transfer cap detachably connected below the connecting disc, and a workbench encoder tool detachably connected below the transfer cap; the workbench encoder is arranged on the workbench encoder tool;
s2, correcting the error data measured by the workbench encoder based on the error data measured by the laser interferometer to obtain the measurement error of the workbench encoder;
s3, operating the hob box and the workbench at a high speed, measuring by using a hob box encoder and a workbench encoder, and obtaining hob box-workbench transmission chain error data through a hob box-workbench transmission chain error detection program;
s4, combining the measurement error of the workbench encoder with the error data of the hob box-workbench transmission chain to obtain corrected final error data;
s5, generating a compensation file by a compensation program based on the final error data;
and S6, inputting the compensation file into a numerical control system of the gear hobbing machine to compensate the transmission chain error of the gear hobbing machine.
2. The method of compensating for gear hobbing machine drive chain error of claim 1, wherein in step S3 the hob box encoder is set at the hob box arbor position by the hob box encoder fixture.
3. The method as claimed in claim 1, wherein the signals from the laser interferometer, the stage encoder and the hob box encoder are subdivided by the subdivision box and transmitted to the data acquisition system to form corresponding measurement data.
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| CN202010130750.6A CN111266671B (en) | 2020-02-28 | 2020-02-28 | Error compensation method for transmission chain of gear hobbing machine |
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| CN202010130750.6A CN111266671B (en) | 2020-02-28 | 2020-02-28 | Error compensation method for transmission chain of gear hobbing machine |
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| CN111266671B true CN111266671B (en) | 2022-03-25 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1713763A1 (en) * | 1989-09-19 | 1992-02-23 | Производственное объединение "Коломенский завод тяжелого станкостроения" | Method of compensating for errors of spur gearing |
| JP2628924B2 (en) * | 1990-04-05 | 1997-07-09 | ファナック株式会社 | Gear pitch error correction method for numerical controller |
| CN105215479B (en) * | 2015-10-27 | 2018-01-12 | 湖北三峡职业技术学院 | A kind of digital control gear shaper synchronous rotary axis error compensation method |
| CN106705894B (en) * | 2017-01-25 | 2019-03-26 | 天津大学 | The error calibration of double Circular gratings Angular Displacement Detecting Systems and compensation method |
| CN109047945A (en) * | 2018-08-10 | 2018-12-21 | 宜昌长机科技有限责任公司 | A method of improving Gear Processing precision and stability |
| CN109500654B (en) * | 2018-12-14 | 2021-01-01 | 重庆大学 | Error compensation method and system for transmission chain of machine tool |
| CN110398359B (en) * | 2019-08-14 | 2024-03-15 | 华南理工大学 | Dynamic detection method and device for comprehensive errors of mechanical transmission chain |
| CN110568816B (en) * | 2019-08-26 | 2020-10-09 | 重庆大学 | Hobbing tooth surface error compensation method and system based on equivalent transmission chain error calculation |
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