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CN-119141167-B - Machining method for improving coaxiality of spindle serial holes of workbench shell

CN119141167BCN 119141167 BCN119141167 BCN 119141167BCN-119141167-B

Abstract

The invention relates to a processing method for improving coaxiality of a main shaft serial hole of a workbench shell, and belongs to the field of high-precision part processing. The method comprises the following steps of S1, fixing a workbench shell on a vertical lathe workbench, finely turning a first datum plane, a serial hole and a datum hole, S2, fixing a turnover workbench shell on the vertical lathe workbench, finely turning a second datum plane and a serial hole, S3, fixing the turnover workbench shell on a vertical mill workbench, finely grinding the first datum plane, the serial hole and the datum hole, S4, overturning the workbench shell and fixing the turnover workbench shell on the vertical mill workbench, installing a part receiving disc into the serial hole of the second datum plane, and finely grinding the serial hole on the part receiving disc. And the coaxiality correction is carried out by adopting a dial indicator, and the adjustment precision and the coaxiality of each serial hole are improved by adopting a constant-height magnetic conduction block, a clamp and a regulator. According to the invention, through overturning the workbench shell for multiple times, the hole-stringing finish turning and the precision calibration are performed step by step, so that accumulated errors caused by one-time machining are avoided, and the machining precision and the coaxiality of the hole-stringing are improved.

Inventors

  • YU JIN
  • PAN ZHIMIN
  • GAO HUAI
  • MEI ZHEN

Assignees

  • 重庆机床(集团)有限责任公司

Dates

Publication Date
20260508
Application Date
20241028

Claims (10)

  1. 1. A processing method for improving coaxiality of a spindle serial hole of a workbench shell is characterized in that one end of the workbench shell (1) is a first reference surface (101), the other end of the workbench shell is a second reference surface (102), a part receiving disc (2) is matched with the workbench shell (1), one surface of the part receiving disc (2) is provided with an outer circle, the other surface of the part receiving disc is provided with a serial hole, and the outer circle is clamped into the serial hole finely turned by the second reference surface (102) to realize connection of the workbench shell (1) and the part receiving disc (2); the serial hole processing method on the workbench shell (1) comprises the following steps: S1, fixing a workbench shell (1) on a vertical lathe workbench (5) through a first vehicle (4), and sequentially finely turning a first reference surface (101) at one end of the workbench shell (1), a serial hole and a reference hole (104) on the first reference surface (101), wherein the serial hole and the reference hole (104) are sequentially arranged from the first reference surface (101) to the inner direction of the workbench shell (1) and are coaxially connected; S2, placing the workbench shell (1) on a second vehicle (7) after being turned by 180 degrees, fixing the workbench shell on the vertical lathe workbench (5) through a clamp (6), correcting the coaxiality of the reference hole (104), and finely turning a second reference surface (102) at the other end of the workbench shell (1) and a serial hole on the second reference surface (102), wherein the serial hole in the S2 step is ensured to be coaxial with the reference hole (104); S3, turning the workbench shell (1) 180 degrees again, mounting the workbench shell (1) on a vertical mill workbench (9) through the first vehicle (4), and finely grinding the first reference surface (101) and the serial holes and the reference holes (104) on the first reference surface (101) after the coaxiality of the serial holes on the first reference surface (101) is corrected; S4, turning over the workbench shell (1) 180 degrees for the third time, enabling the workbench shell (1) to be fixed on the vertical mill workbench (9) through the first reference surface (101) and the magnetic conduction block (13), clamping the part receiving disc (2) into a serial hole of the second reference surface (102), and after the coaxiality of the reference hole (104) is corrected, finely grinding the serial hole which is far away from the workbench shell (1) and is finely machined on the part receiving disc (2) to be coaxial with the reference hole (104).
  2. 2. The machining method for improving coaxiality of spindle serial holes of a workbench housing according to claim 1, wherein a third datum surface (103) located between the first datum surface (101) and the second datum surface (102) is arranged on the workbench housing (1), bench scraping is carried out on the third datum surface (103) of the workbench housing (1) before step S1, the first vehicle (4) is mounted on the vertical lathe workbench (5) to finish turning of the top surface of the workbench housing, and the workbench housing (1) is fixed on the first vehicle (4) in a mode that the third datum surface (103) is in contact with the top surface of the first vehicle (4).
  3. 3. The processing method for improving coaxiality of spindle serial holes of a workbench shell according to claim 2, wherein the third datum plane (103) is scraped by a bench worker at least to meet the precision requirement of 12 points/25X 25.
  4. 4. The method for improving coaxiality of spindle serial holes of a workbench housing according to claim 2, wherein the first reference surface (101) is provided with a bolt hole, and the workbench housing (1) is fixedly connected with the first vehicle (4) after the bolt (3) is fixed in the bolt hole and penetrates through the third reference surface (103).
  5. 5. The method for improving coaxiality of spindle serial holes of a workbench housing according to claim 1, wherein in the step S4, the first reference surface (101) is connected with a connecting disc (11) through a connecting bolt (10), and then the connecting disc (11) is fixed on the magnetic conduction block (13).
  6. 6. The method for improving the coaxiality of the spindle serial holes of the workbench shell according to claim 5, wherein the coaxiality of the reference holes (104) is corrected by matching with a dial gauge (8) through propping up the connecting disc (11) through the regulator (12) and fine-adjusting the position of the connecting disc.
  7. 7. The method for improving the coaxiality of the spindle serial holes of the workbench shell according to claim 6, wherein during correction, a dial indicator (8) is arranged on the side wall of the serial holes and/or the reference holes (104), and the coaxiality of the serial holes and/or the reference holes (104) is corrected through the dial indicator (8).
  8. 8. The method for improving coaxiality of spindle serial holes of a workbench housing according to claim 1, wherein the second vehicle (7) is mounted on the vertical lathe workbench (5) and the top surface of the second vehicle (7) is finish-lathed before the step S2 is performed.
  9. 9. The method of claim 1, wherein the step S3 is performed by mounting the first tool (4) on the surface of the vertical mill table (9), and grinding the top surface of the first tool (4).
  10. 10. The method for improving coaxiality of spindle serial holes of a workbench shell according to claim 1, wherein the method is characterized in that before step S4, the surface of the magnetic conduction block (13) is ground until two opposite surfaces on the magnetic conduction block (13) are parallel, and one surface is arranged on the vertical mill workbench (9) in a manner that the other surface is contacted with the vertical mill workbench (9).

Description

Machining method for improving coaxiality of spindle serial holes of workbench shell Technical Field The invention belongs to the field of high-precision part machining, and relates to a machining method for improving coaxiality of a main shaft serial hole of a workbench shell. Background Currently, despite significant advances in industrial automation and precision manufacturing technologies, the precision and stability of machining equipment are continually improved, but the complexity of the serial hole sequence and the severity of the machining precision requirements of machining the gear hobbing machine combination workbench shell still present a great challenge to the traditional machining method. Conventional machining methods tend to employ a single or fewer machining steps to complete the machining of the entire part when handling such high precision parts. However, this method not only puts high demands on the precision and stability of the processing equipment, but also is difficult to effectively avoid the occurrence of accumulated errors due to the influence of various factors such as material deformation, tool wear, thermal effect and the like in the actual processing process, and is particularly influenced by the structure of the workpiece, sometimes the whole workpiece cannot be finished by one-time clamping, and the workpiece must be clamped for multiple times. The errors are gradually accumulated in multiple processing steps, and finally coaxiality and overall accuracy of the part are seriously affected, so that the part cannot meet design requirements and is scrapped even, and the problem is solved, so that the exquisite degree of a processing technology is tested, and the final use performance of the part is further affected. Therefore, exploring new processing methods and processes, how to perform accurate control, avoiding the generation of accumulated errors, is still an important research direction in the current high-precision part processing field. Disclosure of Invention Therefore, the invention aims to provide a processing method for improving the coaxiality of the spindle serial holes of the workbench shell, which is controlled step by step and accurately, avoids accumulated errors caused by one-time processing, and improves the processing precision and the coaxiality of the serial holes. In order to achieve the above purpose, the present invention provides the following technical solutions: the machining method for improving coaxiality of the spindle serial holes of the workbench shell comprises the steps that one end of the workbench shell is a first reference surface, the other end of the workbench shell is a second reference surface, a part receiving disc is matched with the workbench shell, one surface of the part receiving disc is provided with an outer circle, the other surface of the part receiving disc is provided with a serial hole, and the outer circle is clamped into the serial hole finely machined in the second reference surface, so that the workbench shell is connected with the part receiving disc; the serial hole processing method on the workbench shell comprises the following steps of: s1, fixing the workbench shell on a workbench of a vertical lathe through a first vehicle, and sequentially finish turning a first reference surface at one end of the workbench shell, a serial hole and a reference hole on the first reference surface, wherein the serial hole and the reference hole are sequentially arranged from the first reference surface to the interior direction of the workbench shell and are coaxially connected; S2, turning the workbench shell by 180 degrees, then placing the workbench shell on a second vehicle, fixing the workbench shell on the vertical lathe workbench through a clamp, correcting the coaxiality of the reference holes, and finely turning a second reference surface at the other end of the workbench shell and a serial hole on the second reference surface, wherein the serial hole in the S2 step is ensured to be coaxial with the reference hole; s3, turning the workbench shell 180 degrees again, mounting the workbench shell on a vertical mill workbench through the first vehicle, and finely grinding the first reference surface, the serial holes on the first reference surface and the reference holes after the coaxiality of the serial holes on the first reference surface is corrected; S4, turning over the workbench shell 180 degrees for the third time, enabling the workbench shell to be fixed on the vertical mill workbench through the magnetic conduction block by contacting the first reference surface with the magnetic conduction block, clamping the part receiving disc into the serial holes of the second reference surface, and after correcting the coaxiality of the reference holes, finely grinding the serial holes which are far away from the workbench shell and are finely turned on the part receiving disc to be coaxial with the reference holes. Optionall