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Method for machining ultrathin wall sleeve parts

A processing method and ultra-thin wall technology, applied in the field of mechanical processing, can solve the problems of thin wall thickness of parts, difficult positioning of the taper mandrel, and difficult clamping, etc., to ensure the coaxiality of the inner and outer circles, and to ensure the size and shape of the outer circle. desired effect

Inactive Publication Date: 2014-03-26
CHONGQING YUEJIN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1) The wall thickness of the part is very thin, the rigidity is poor, and the ordinary clamping method is easy to cause deformation;
[0009] 2) Thermal deformation during processing is not easy to control;
[0012] 2 Difficulty in clamping
[0013] The inner hole is stepped, and it is difficult to locate a separate tapered mandrel, plastic mandrel, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment includes the following steps:

[0042] 1) Normalize the forged workpiece;

[0043] 2) Rough turning: Use a three-jaw chuck to clamp the forged workpiece on the lathe, leave a margin of 3mm on one side of the inner hole, and leave a margin of 8mm on one side of the outer circle to ensure that the wall thickness is greater than 10mm for rough turning, so that the outer circle of the workpiece The steps at both ends and the step forming of the inner hole at the small end;

[0044] 3) The first aging stress relief treatment: the heat treatment temperature is 260°C, the holding time is 3h, and the stress is fully removed;

[0045] 4) Semi-finished turning: Clamp the workpiece on the lathe with fan-shaped soft jaws, leave a margin of 1mm on one side of the inner hole and the outer circle of the small end, and leave a margin of 5mm on the outer circle of the large end to ensure that the wall thickness is greater than 7mm for semi-finishing turning processing;...

Embodiment 2

[0053] This embodiment includes the following steps:

[0054] 1) Normalize the forged workpiece;

[0055] 2) Rough turning: Use a three-jaw chuck to clamp the forged workpiece on the lathe, leave a margin of 4mm on one side of the inner hole, and leave a margin of 7mm on one side of the outer circle to ensure that the wall thickness is greater than 10mm for rough turning, so that the outer circle of the workpiece The steps at both ends and the step forming of the inner hole at the small end;

[0056] 3) The first aging stress relief treatment: the heat treatment temperature is 300°C, the holding time is 3.5h, and the stress is fully removed;

[0057] 4) Semi-finished turning: Clamp the workpiece on the lathe with fan-shaped soft jaws, leave a margin of 1mm on one side of the inner hole and the outer circle of the small end, and leave a margin of 5mm on the outer circle of the large end to ensure that the wall thickness is greater than 7mm for semi-finishing turning processin...

Embodiment 3

[0065] This embodiment includes the following steps:

[0066] 1) Normalize the forged workpiece;

[0067]2) Rough turning: Use a three-jaw chuck to clamp the forged workpiece on the lathe, leave a margin of 3mm on one side of the inner hole, and leave a margin of 8mm on one side of the outer circle to ensure that the wall thickness is greater than 10mm for rough turning, so that the outer circle of the workpiece The steps at both ends and the step forming of the inner hole at the small end;

[0068] 3) The first aging stress relief treatment: the heat treatment temperature is 320°C, the holding time is 4h, and the stress is fully removed;

[0069] 4) Semi-finished turning: Clamp the workpiece on the lathe with fan-shaped soft jaws, leave a margin of 1mm on one side of the inner hole and the outer circle of the small end, and leave a margin of 5mm on the outer circle of the large end to ensure that the wall thickness is greater than 7mm for semi-finishing turning processing; ...

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Abstract

The invention discloses a method for machining ultrathin wall sleeve parts. The method includes the first step of carrying out normalizing treatment on a forge piece, the second step of carrying out rough-turning, the third step of carrying out the first ageing and distressing treatment, the fourth step of carrying out semi-finish-turning, the fifth step of carrying out the second ageing and distressing treatment, the sixth step of carrying out finish-turning on an inner hole and semi-finish-turning outer circles, the seventh step of carrying out the third ageing and distressing treatment, the eighth step of carrying out finish-turning on the small end, the ninth step of carrying out finish-turning on the outer circles, and the tenth step of carrying out ultra-finish-turning on the outer circles. The cylindricity of the outer circles of a finished ultrathin wall sleeve through the method is smaller than or equal to 0.02, and the wall thickness difference of the finished ultrathin wall sleeve is smaller than or equal to 0.02. Size accuracy and accuracy of form and position can all be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a processing method for an ultra-thin wall sleeve part. Background technique [0002] The structural features of the ultra-thin wall sleeve rotary parts are: [0003] 1) The thinnest wall thickness is 0.5mm, and the thickness-to-diameter ratio reaches more than 1:200; [0004] 2) Both ends of the outer circle are stepped, and the inner hole at the small end is also stepped; [0005] 3) High precision requirements: the coaxiality of the inner and outer circles is not greater than 0.05mm, and the deformation in the diameter direction is not greater than 0.05mm. [0006] At present, the processing difficulties of ultra-thin-walled rotary parts are mainly manifested in: [0007] 1 It is difficult to guarantee the size and shape accuracy [0008] 1) The wall thickness of the part is very thin, the rigidity is poor, and the ordinary clamping method is easy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P13/00
CPCB23B1/00B23P15/00
Inventor 冀庆康钟宁张文华靳力
Owner CHONGQING YUEJIN MACHINERY
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