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A processing method for high-precision thin-walled parts using ordinary CNC milling machine equipment

A technology of thin-walled parts and CNC milling machine, applied in the field of parts processing, to achieve the effect of eliminating processing stress, stabilizing processing size and wide application range

Active Publication Date: 2018-06-19
XIAN NORTH ELECTRO OPTIC TECH DEFENSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many necessary hardware for high-speed cutting. Compared with traditional CNC machine tools, high-speed cutting machine tools must have higher hardware configuration, adapted tool system and special processing procedures in structure.

Method used

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  • A processing method for high-precision thin-walled parts using ordinary CNC milling machine equipment
  • A processing method for high-precision thin-walled parts using ordinary CNC milling machine equipment
  • A processing method for high-precision thin-walled parts using ordinary CNC milling machine equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for processing high-precision thin-walled parts using ordinary numerical control milling machine equipment, comprising the following steps:

[0031] Step 1) Rough machining of thin-walled parts, rough machining of thin-walled parts by milling, leaving a machining allowance of 0.5mm on each surface;

[0032] Step 2) Heat treatment to remove processing stress, heat the rough-machined thin-walled parts in step 1) at a heating temperature of 140±10°C, keep warm for 5-7 hours, and air cool to room temperature;

[0033] Step 3) Finishing the datum surface, milling and grinding the thin-walled parts after step 2) to process the datum surface to ensure that the flatness of the datum surface in contact with the fixture is 0.002mm, and the verticality of the datum surface of the positioning inner hole is 0.01mm and Size Φ88+0.03+0.02;

[0034] Step 4) Finish machining of the thin-walled parts after finishing the reference plane in step 3) on the ordinary CNC milling mac...

Embodiment 2

[0038] A method for processing high-precision thin-walled parts using ordinary numerical control milling machine equipment, comprising the following steps:

[0039] Step 1) Rough machining of thin-walled parts, rough machining of thin-walled parts by milling, leaving a machining allowance of 0.5mm on each surface;

[0040] For rough machining, choose a high-speed steel milling cutter with a diameter of Ф40mm, a cutting speed of 25 m / min to 35 m / min, a feed rate of 0.25 mm / r, and a cutting depth of 1 mm to 3 mm.

[0041] Step 2) heat treatment to remove processing stress, heat the rough-machined thin-walled parts in step 1) at a heating temperature of 140±10°C, keep warm for 5-7 hours, and air cool to room temperature; this heat treatment stress relief is artificial aging.

[0042] Step 3) Finishing the datum surface, milling and grinding the thin-walled parts after step 2) to process the datum surface to ensure that the flatness of the datum surface in contact with the fixture...

Embodiment 3

[0048] Such as figure 1 and figure 2 As shown, the thin-walled parts adopt cast aluminum alloy thin-walled frame parts 1;

[0049] Step 1) Rough machining stage: the parts are casting blanks, and the material is ZL104A. Firstly, rough machining and scribing, check the machining allowance of the blank, and draw the rough reference line for part machining; secondly, use the milling method to roughly machine the parts, leaving a machining allowance of 0.5mm on each surface. Due to the large machining allowance of the part at this time, the machining parameters used are high-speed steel rod milling cutter with a diameter of Ф40mm, cutting speed of 25m / min, feed rate of 0.25mm / r, and cutting depth of 1mm to 3mm.

[0050] Step 2) Heat treatment to remove processing stress, heat the rough-machined thin-walled parts in step 1) at a heating temperature of 140±10°C, keep warm for 5-7 hours, and air cool to room temperature;

[0051] Such as image 3 , Figure 4 As shown, step 3) f...

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PUM

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Abstract

The invention relates to a method for machining high-accuracy and thin-wall parts through common numerical control milling machine equipment. The method comprises the steps of 1, carrying out rough machining on the thin-wall parts in a milling mode and preserving the machining allowance of 0.5 mm for each surface; 2, removing machining stress through heat treatment, heating the thin-wall parts subjected to rough machining and then air-cooling the thin-wall parts to the indoor temperature, wherein the heating temperature is 140+ / -10 DEG C and is preserved for 5-7 hours; 3, carrying out finish machining on datum planes and machining the datum planes of the thin-wall parts subjected to heat treatment in a milling and grinding mode, wherein the flatness of the datum planes making contact with clamps is 0.002 mm, the perpendicularity of the datum planes in locating holes is 0.01 mm, and the size Phi of the datum planes in locating holes is 88+0.03+0.02; 4, carrying out finish machining on the thin-wall parts with the datum planes subjected to finish machining on the common numerical control milling machine equipment, wherein the inferior high-speed cutting mode is adopted for carrying out finish machining on the thin-wall parts in the numerical control machining process; 5, carrying out vacuum heat treatment on the thin-wall parts subjected to finish machining. According to the invention, machining errors are reduced, the machining precision is guaranteed, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of parts processing, in particular to a method for processing high-precision thin-walled parts by using ordinary numerical control milling machine equipment. Background technique [0002] With the development of weapons and equipment in the direction of light weight and intelligence, a large number of thin-walled structural parts are used in products. Most of these parts have complex structures, specific shapes, thin walls (wall thickness less than or equal to 3mm), poor rigidity, and high precision requirements. (Perpendicularity 0.005mm, coaxiality Φ0.005mm) and other characteristics. The traditional processing method produces a large cutting force, and the processing stress causes large deformation of the thin-walled high-precision parts, making it difficult for the final product to meet the design requirements. At present, in the methods of solving the cutting deformation of thin-walled high-precision parts and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B23C3/00
CPCB23C3/00B23P15/00
Inventor 刘涛孙婙陈贞奇
Owner XIAN NORTH ELECTRO OPTIC TECH DEFENSE