CN-122007936-A - Machining method of special-shaped piece

CN122007936ACN 122007936 ACN122007936 ACN 122007936ACN-122007936-A

Abstract

The invention relates to a processing method of a special-shaped piece, belongs to the technical field of precision machining, and solves the problems that in the prior art, the special-shaped piece is difficult to clamp, is easy to deform in the processing process and is low in processing precision. The method comprises the following steps of S1, preparing and installing clamping lugs on two side edges of a special-shaped piece, S2, carrying out rough machining on the inner cavity surface, providing discontinuous elastic support for the protruding outer shape surface of the special-shaped piece during machining, S3, carrying out rough machining on the outer shape surface, providing discontinuous rigid support for the inner cavity surface of the special-shaped piece during machining, S4, carrying out finish machining on the inner cavity surface of the special-shaped piece, and providing discontinuous rigid support for the protruding outer shape surface of the special-shaped piece during machining, and S5, removing the clamping lugs. The invention solves the problem that the special-shaped piece is difficult to clamp by arranging the clamping lugs, reduces the internal stress generated by machining and cutting by a targeted discontinuous supporting mode in the rough and finish machining stages, and improves the integral machining precision.

Inventors

WEI RUI
MA HONGWANG
CHEN XIAOWEI
JIN HERONG
YANG HONGQING
WEI YUAN
LIN LIN
SUN ZHONGRUI
CAO ZICHEN
XU BAODE
SONG XIAOYU

Assignees

北京星航机电装备有限公司
燕山大学

Dates

Publication Date: 20260512
Application Date: 20260313

Claims (10)

1. The processing method of the special-shaped piece is characterized by comprising the following steps of: s1, preparing and installing clamping lugs to two side edges of a special-shaped piece; s2, rough machining is carried out on the inner cavity surface of the special-shaped piece, and discontinuous elastic support is provided for the convex outline surface of the special-shaped piece during machining; S3, rough machining is carried out on the appearance surface of the special-shaped piece, and discontinuous rigid support is provided for the inner cavity surface of the special-shaped piece during machining; S4, carrying out finish machining on the inner cavity surface of the special-shaped piece, and providing discontinuous rigid support for the convex profile surface of the special-shaped piece during machining; And S5, removing the clamping lugs.
2. Method for machining a profile according to claim 1, characterized in that in step S1 the clamping lugs are fixedly connected to both side edges of the profile by welding.
3. A method of machining a profile according to claim 2, wherein two locating slots are provided on the clamping lug symmetrically up and down.
4. The method for machining a special-shaped piece according to claim 1, wherein the step S2 specifically comprises the step S21 of adjusting the fixture to an initial state and the step S22 of placing the inner cavity surface of the special-shaped piece on the fixture upwards.
5. The method of claim 4, wherein step S2 further comprises the step of clamping and fixing the clamping lugs by clamping plates of the tool clamp S23.
6. The method of claim 5, wherein step S2 further comprises providing discontinuous elastic support to the convex profile surface of the profile by the tool clamp S24.
7. The method for machining the special-shaped piece according to claim 1, wherein the step S3 specifically comprises the step S31 of installing a first quick-change rigid clamp on a rigid supporting unit of the tool clamp and adjusting the rigid supporting unit to be located at a first height, so that an upward-protruding supporting surface of the first quick-change rigid clamp can be abutted against the inner cavity surface of the special-shaped piece installed in place.
8. The method of processing a profile according to claim 7, wherein step S3 further comprises S32 of axially positioning the profile by means of a tooling fixture such that the profile of the profile faces upwards.
9. The method for machining a special-shaped piece according to claim 8, wherein the step S3 further comprises the step of clamping and fixing the clamping lugs through clamping plates of the tool clamp, and the step of rough machining the appearance surface of the special-shaped piece, wherein the step S33 comprises the step of rough machining the appearance surface of the special-shaped piece.
10. Method for machining a profile according to claim 1, characterized in that in step S5 the clamping lugs are removed by milling.

Description

Machining method of special-shaped piece Technical Field The invention relates to the technical field of precision machining, in particular to a machining method of a special-shaped piece. Background The special-shaped piece is a part of a circumferential structure which is obtained by cutting and dividing a thin-wall cylinder, is in a non-closed opening shape as a whole, and has a structure shown in figure 2, and comprises an inner cavity surface in a circular arc shape, an outer shape surface in a circular arc shape which protrudes outwards, two end parts and two side edges, wherein the inner cavity surface and the outer shape surface are required to be respectively machined. The irregular part is difficult to clamp and position during processing due to irregular shape and outline, and has weaker overall rigidity due to the structural characteristics that the axial length dimension is more than or equal to 1500mm and the wall thickness is less than or equal to 3mm, deformation is easy to occur during processing, and the processing precision and the product quality are seriously restricted. Disclosure of Invention In view of the above analysis, the present invention aims to provide a method for processing a profile, which is used for solving one of the problems that the profile is difficult to clamp, is easy to deform during processing, and has low processing precision. In one aspect, the invention provides a method for processing a profiled member, comprising the steps of: s1, preparing and installing clamping lugs to two side edges of a special-shaped piece; s2, rough machining is carried out on the inner cavity surface of the special-shaped piece, and discontinuous elastic support is provided for the convex outline surface of the special-shaped piece during machining; S3, rough machining is carried out on the appearance surface of the special-shaped piece, and discontinuous rigid support is provided for the inner cavity surface of the special-shaped piece during machining; S4, carrying out finish machining on the inner cavity surface of the special-shaped piece, and providing discontinuous rigid support for the convex profile surface of the special-shaped piece during machining; And S5, removing the clamping lugs. Further, in step S1, the clamping lugs are fixedly connected to both side edges of the profile by welding. Further, two positioning grooves which are vertically symmetrical are arranged on the clamping lug. Further, the step S2 specifically comprises the steps of S21 of adjusting the fixture to an initial state and S22 of placing the inner cavity surface of the special-shaped piece on the fixture upwards. Further, the step S2 further comprises the step S23 of clamping and fixing the clamping lugs through clamping plates of the tool clamp. Further, the step S2 also comprises the step S24 of providing discontinuous elastic support to the convex profile surface of the profiled element through the tool clamp. Further, the step S24 specifically comprises synchronously driving a plurality of elastic supporting units arranged in parallel at intervals, so that the supporting heads of the plurality of elastic supporting units are abutted against different areas on the convex profile surface of the profile with preset pressure. Further, the step S3 specifically comprises the steps of S31 of installing a first quick-change rigid clamp on a rigid supporting unit of the tool clamp, and adjusting the rigid supporting unit to be located at a first height, so that an upward convex supporting surface of the first quick-change rigid clamp can be abutted against the arc-shaped inner cavity surface of the profile in place. Further, the step S3 further comprises the step S32 of axially positioning the special-shaped piece through the fixture so that the appearance surface of the special-shaped piece faces upwards. Further, the step S3 further comprises the step S33 of clamping and fixing the clamping lugs through clamping plates of the tool clamp. Further, step S32 also comprises compensating for the offset caused by the deformation of the profile by adjusting the height of the lower clamping plate in the tooling fixture. Further, the step S4 specifically comprises S41 of disassembling the first quick-change rigid clamp and adjusting the rigid support unit to be located at the second height, so that the first concave rigid support surface of the rigid support unit can abut against the convex profile surface of the profile in place. Further, the step S4 also comprises the step S42 of placing the inner cavity surface of the special-shaped piece on a fixture clamp upwards, and the step S43 of clamping and processing the special-shaped piece. Further, in step S5, the clamping lugs are removed by milling. Compared with the prior art, the invention has at least one of the following beneficial effects: (1) The clamping lugs are arranged on the edges of two sides of the special-shaped piece, so that the problem that the s