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Processing method of aluminum alloy thin-wall cylindrical part

A processing method and technology of aluminum alloy, applied in the field of mechanical processing, can solve the problems of great influence on the machining accuracy and surface finish of parts, increased consumption of raw materials, and reduced product qualification rate, so as to save materials and processing time, reduce Processing cost, the effect of low processing cost

Active Publication Date: 2014-07-30
贵州凯星液力传动机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of processing, due to the influence of cutting force, cutting heat, residual pressure stress, clamping force and other factors, processing deformation will occur, which has a great impact on the processing accuracy and surface finish of parts, and it is easy to cause scrapping, especially for car parts. In the inner hole, due to the unstable clamping and the soft aluminum alloy material, the product is directly deformed by the three-point clamping force, resulting in the following problems in the inner hole processing that cannot meet the technical requirements: the inner hole is elliptical, and the roundness error >0.14mm; the inner hole is trumpet-shaped, and the taper error is >0.21mm
Due to the large roundness error or taper error in the inner hole, the wall thickness of the product will be uneven after processing, and a large number of defective or waste products will be produced, which will increase the consumption of raw materials and increase the cost of the product; in addition, there are Problems such as rotation thermal stress deformation and crushing, tool flexible deformation, etc., greatly reduce the product qualification rate
At present, it is mainly to use multiple heat treatments to improve the strength of the parts, improve the cutting performance, and use multiple clamping and trimming to ensure the dimensional accuracy of the parts. Although these methods can improve the processing deformation of aluminum alloy thin-walled parts to a certain extent, But the process is complicated and the processing cost is high

Method used

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  • Processing method of aluminum alloy thin-wall cylindrical part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: need processing such as figure 1 For the part shown, its length L is 450mm, and the coaxiality requirement is The cylindricity requirement is The surface roughness Ra value is 1.6μm, and the wall thickness is 1.5mm.

[0031] In the first step, design such as image 3 Rough and semi-finish turning bore jig shown:

[0032] The inner hole fixture of semi-finishing car is composed of collet, three-jaw chuck, elastic collet, elastic rubber, nylon center frame, balance bar, etc. In order to prevent the product from being directly affected by the three-point clamping force, the elastic collet is designed to make the product The clamping position is evenly stressed, and the wall thickness of the elastic jacket is 1.8mm and slotted. Replace the three steel bearings of the center frame with nylon parts to reduce thermal stress deformation and crush damage, and the nylon material is nylon 101. In order to prevent the cantilever beam structure of this tool, a b...

Embodiment 2

[0039] Embodiment 2: need processing such as figure 1 For the part shown, its length L is 500mm, and the coaxiality requirement is The cylindricity requirement is The surface roughness Ra value is 1.6μm, and the wall thickness is 1.8mm.

[0040] The first and second steps are the same as in Example 1, wherein in the first step, the wall thickness of the elastic jacket is 1.6 mm, and in the second step, the wall thickness of the positioning clamping cylinder is 4 mm, and the coaxiality between the inner hole and the outer circle is 0.019 mm, the verticality between the axial positioning step and the center of rotation is 0.022mm, the axial clamping sleeve is a fine thread, the inner diameter is 1mm larger than the outer diameter of the workpiece, and the parallelism of both ends is 0.023mm. The third step of turning:

[0041] Cutting: cut the pipe made of aluminum alloy LY12-CZ into sections, and determine the cutting position; select the cutting tool: select the cutting t...

Embodiment 3

[0042] Embodiment 3: need processing such as figure 1 For the part shown, its length L is 600mm, and the coaxiality requirement is The cylindricity requirement is The surface roughness Ra value is 1.6μm, and the wall thickness is 2mm.

[0043] The first and second steps are the same as in Example 1, wherein in the first step, the wall thickness of the elastic jacket is 2mm, and in the second step, the wall thickness of the positioning clamping cylinder is 4mm, and the coaxiality between the inner hole and the outer circle is 0.025mm , The perpendicularity between the axial positioning step and the center of rotation is 0.025mm, the axial clamping sleeve is a fine thread, the inner diameter is 1mm larger than the outer diameter of the workpiece, and the parallelism of both ends is 0.025mm. The third step of turning:

[0044] Cutting: cut the pipe made of aluminum alloy LY12-CZ into sections, and determine the cutting position; select the cutting tool: select the cutting to...

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Abstract

The invention discloses a processing method of an aluminum alloy thin-wall cylindrical part. The method comprises the following steps of blanking, tool selection, rough machining, excircle semi-finish machining, aging treatment, internal-hole semi-finish machining, internal-hole finish machining, excircle finish machining and the like. According to the method, as a special clamp is adopted to guarantee clamping precision, the clamping deformation is reduced and the internal stress of part processing is eliminated; moreover, the method is simple to operate; for a workpiece, procedures of keeping a technological chuck and removing the technological chuck are omitted, so that the material and the processing time are saved; meanwhile, the aluminum alloy thin-wall cylindrical part processed by using the method is stable in quality, low in processing cost and high in efficiency; in addition, the influence that a product generates deformation due to directly suffering three-point clamping force can also be avoided, the rotation heat stress deformation and the pressure damage can be reduced, the flexible deformation of the tools can be reduced, the raw material consumption of the product can be reduced, and the qualification rate and the production efficiency of the workpiece can be improved; moreover, the processing cost can be lowered.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a processing method for an aluminum alloy thin-walled cylindrical part. Background technique [0002] needs to be processed as figure 1 For the aluminum alloy thin-walled cylindrical parts shown, the product material is aluminum alloy LY12-CZ, the length is L, and the outer diameter is Inner diameter is Concentricity is mm, the cylindricity is The surface roughness Ra value was 1.6 μm. In addition to the relatively simple shape of such parts, the shape tolerance and surface roughness are relatively high, the wall thickness ≤2mm, and the part length L>440mm, is a typical thin-walled part. Because the wall is thin and the processing material is aluminum alloy, it is easy to deform during processing, mainly manifested in the radial deformation of the inner hole and the taper in the axial direction, and the quality is not easy to guarantee. [0003] The proc...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 汪植林
Owner 贵州凯星液力传动机械有限公司
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