Search

CN-121988985-A - Numerical control machining method for open type aluminum alloy forging material part

CN121988985ACN 121988985 ACN121988985 ACN 121988985ACN-121988985-A

Abstract

A numerical control machining method for an open type aluminum alloy forging material part comprises the steps of firstly machining a front surface and a back surface of the part on a blank to form reference planes, then aligning the part by using a scribing template to determine the positions of two process reference holes, sequentially rough machining the front surface and the back surface of the part, fully releasing internal stress of the part, machining the reference planes of the part in a natural state, expanding and hinging the two process reference holes on the part, fully releasing internal stress after semi-finish machining the front surface and the back surface of the part by using a five-axis numerical control milling machine, machining the reference planes of the part in the natural state, expanding and hinging the two process reference holes, finally finish machining the front surface and the back surface of the part in place, cutting off process patches of the part, and checking the part. The invention adopts a high-speed machine tool for semi-finishing and finishing, can greatly reduce the deformation influence on the part during processing, and adopts a distributed process patch to follow the profile distribution of the part, thereby greatly releasing the internal stress of the part.

Inventors

  • FENG LIANG
  • CHEN CHAO
  • WU HUI
  • WANG ERZHEN
  • Lai Tianfa
  • WAN QING
  • ZENG JUNJIE
  • LIU TONG

Assignees

  • 江西洪都航空工业集团有限责任公司

Dates

Publication Date
20260508
Application Date
20260123

Claims (7)

  1. 1. A numerical control machining method for an open type aluminum alloy forging material part is characterized by comprising the following specific steps: 1) Checking blank allowance, and processing the front surface and the back surface of a part on the blank by adopting a three-axis numerical control machine tool in a natural state to form a reference plane; 2) Aligning the part by using a scribing template, and determining the positions of two process reference holes on the part under the condition that the allowance of the part is ensured; 3) Rough machining the front surface and the back surface of the part by using a three-axis numerical control machine tool, removing the allowance of the part blank, and ensuring the allowance to be 5mm after rough machining; 4) Loosening the part, and naturally aging for 48 hours to fully release the internal stress of the part; 5) Machining a reference plane of the part in a natural state, and expanding and hinging two process reference holes on the part; 6) Semi-finishing the front surface and the back surface of the part by using a five-axis numerical control milling machine, removing the allowance of a blank of the part, and enabling the allowance after semi-finishing to be 2mm; 7) Loosening the part, naturally aging for 48 hours, and fully releasing the internal stress; 8) Processing a reference plane of a part in a natural state, and expanding and hinging two process reference holes by adopting a five-axis numerical control milling machine so as to remove deformation generated by positioning reference of the processing process reference holes; 9) Finish machining the front surface and the back surface of the part in place by using a five-axis numerical control milling machine; 10 The part is measured according to the measuring procedure, the process patch of the part is cut off, and the part is inspected.
  2. 2. The numerical control machining method for the open type aluminum alloy forging material part according to claim 1, wherein in the step 1), the three-axis numerical control machine tool is a three-axis low-speed numerical control machine tool, and the cutter is a disc milling cutter.
  3. 3. The numerical control machining method for the open type aluminum alloy forging material part according to claim 1, wherein in the step 3), the three-axis numerical control machine tool is a three-axis low-speed numerical control machine tool, and the cutter is high-speed steel.
  4. 4. The numerical control machining method for the open type aluminum alloy forging material part according to claim 1, wherein in the step 6), a five-axis numerical control milling machine adopts a high-rotation-speed, fast-feeding and small-cutting-tool-size machining process.
  5. 5. The numerical control machining method for the open type aluminum alloy forging material part according to claim 1, wherein in the step 6), the five-axis numerical control milling machine is a five-axis high-speed numerical control milling machine, and the cutter is an integral hard alloy.
  6. 6. The numerical control machining method for the open type aluminum alloy forging material part according to claim 1, wherein in the step 8), the five-axis numerical control milling machine is a five-axis high-speed numerical control milling machine, and the cutter is an integral hard alloy.
  7. 7. The numerical control machining method for the open type aluminum alloy forging material part according to claim 1, wherein in the step 9), the five-axis numerical control milling machine is a five-axis high-speed numerical control milling machine, and the cutter is an integral hard alloy.

Description

Numerical control machining method for open type aluminum alloy forging material part Technical Field The invention relates to the technical field of machining of mechanical parts, in particular to a numerical control machining method for an open type aluminum alloy forging material part. Background The deformation of the aluminum alloy forging material part, especially the open structure, is difficult to control in the processing process. By adopting a common processing method, the internal stress of the self material is continuously released in the processing, so that the part is large in deformation, low in qualification rate, low in processing efficiency, high in processing difficulty and incapable of meeting the design requirement. Meanwhile, the processing process of the aluminum alloy forging material part with the open structure has the two difficulties that ① aluminum alloy forging necessarily generates larger deformation in the processing process and has large deformation degree, ② open type part continuously releases internal stress in the processing process and further increases deformation, and the two problems that the conventional processing method is adopted to reduce deformation, only reduce the cutting speed of a machine tool, further influence the processing efficiency, and the processing deformation is difficult to control, low in qualification rate and difficult to process, and cannot meet the requirement of adapting to mass production. Disclosure of Invention The invention aims to provide a numerical control machining method for an open type aluminum alloy forging material part, which aims to solve the problems in the background art. The technical problems solved by the invention are realized by adopting the following technical scheme: a numerical control machining method for an open type aluminum alloy forging material part comprises the following specific steps: 1) Checking blank allowance, and processing the front surface and the back surface of the part on the blank by adopting a three-axis numerical control machine tool in a natural state to form a reference plane, so as to ensure that the allowance is removed uniformly from the front surface and the back surface of the part; 2) Aligning the part by using a scribing template, and determining the positions of two process reference holes on the part under the condition that the allowance of the part is ensured; 3) Rough machining the front surface and the back surface of the part by using a three-axis numerical control machine tool, removing the allowance of the part blank, and ensuring the allowance to be 5mm after rough machining; 4) Loosening the part, and naturally aging for 48 hours to fully release the internal stress of the part; 5) Machining a reference plane of the part in a natural state, and expanding and hinging two process reference holes on the part; 6) Semi-finishing the front surface and the back surface of the part by using a five-axis numerical control milling machine, removing the allowance of a blank of the part, and enabling the allowance after semi-finishing to be 2mm; 7) Loosening the part, naturally aging for 48 hours, fully releasing the internal stress, and after the working procedure, fully releasing the internal stress of the part; 8) Processing a reference plane of a part in a natural state, and expanding and hinging two process reference holes by adopting a five-axis numerical control milling machine so as to remove deformation generated by positioning reference of the processing process reference holes; 9) Finish machining the front surface and the back surface of the part in place by using a five-axis numerical control milling machine; 10 The part is measured according to the measuring procedure, the process patch of the part is cut off, and the part is inspected. In the invention, in the step 1), the three-axis numerical control machine tool is a three-axis low-speed numerical control machine tool, and the cutter is a disc milling cutter. In the invention, in the step 3), the three-axis numerical control machine tool is a three-axis low-speed numerical control machine tool, and the cutter is high-speed steel. In the invention, in the step 6), the five-axis numerical control milling machine adopts high-rotation-speed, fast feeding and small cutting amount to remove redundant materials, thereby greatly reducing the deformation influence on the parts during processing. In the invention, in the step 6), the five-axis numerical control milling machine is a five-axis high-speed numerical control milling machine, and the cutter is an integral hard alloy. In the invention, in the step 8), the five-axis numerical control milling machine is a five-axis high-speed numerical control milling machine, and the cutter is an integral hard alloy. In the invention, in the step 9), the five-axis numerical control milling machine is a five-axis high-speed numerical control milling machine, and the cutter is an integral h