Technology and tool for reducing deformation of annular casting thin-walled part after machining and casting

A thin-walled parts processing and thin-walled parts technology, which is applied in the field of thin-walled ring parts processing, can solve the problems of high assembly and sealing requirements, seal failure, and easy ellipse, and achieve the elimination of deformation stress, good sealing performance, and reduced deformation of ellipse Effect

Pending Publication Date: 2020-12-11
中船发动机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the material selection of the cooling water jacket can reduce the risk of deformation to a certain extent, due to the high requirements for assembly and sealing, the inner wall must be finished
The inventors found that in addition to additional clamping stress, material removal and material removal shear stress, there is also the influence of force in the casting process, which makes the inner diameter of thin-walled parts very easy to ellipse after processing, and the ellipse will cause seal failure The problem

Method used

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  • Technology and tool for reducing deformation of annular casting thin-walled part after machining and casting
  • Technology and tool for reducing deformation of annular casting thin-walled part after machining and casting
  • Technology and tool for reducing deformation of annular casting thin-walled part after machining and casting

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Experimental program
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Effect test

Embodiment 1

[0049] A process method for reducing post-processing deformation of annular cast thin-walled parts, specifically as follows:

[0050] Increase the fixed position of the pressure plate

[0051] as follows figure 1 As shown for the ring structure without clamping position, as follows figure 2 The red parts 1-4 shown in the figure change the product structure by casting. Add a briquetting structure near the lower part of the product body and increase the clamping position. The briquetting position must be evenly distributed along the circumferential direction.

[0052] Elimination of casting internal stress method: The surface of the cast thin-walled parts is cleaned by falling sand. And further through the surface sand blasting treatment, after sand blasting, let it stand for at least 7 days of natural aging to eliminate the internal stress of casting.

[0053] Attached below image 3 Four lateral supports are added symmetrically in the middle, and the support position in t...

Embodiment 2

[0059] A tool for reducing the deformation of ring-shaped cast thin-walled parts after processing, including: a pressure block 2, a lateral support 3, there are multiple pressure blocks 2, and a plurality of lateral supports 3, and the position of the pressure block 2 is cast along the ring The thin-walled parts 1 are evenly distributed in the circumferential direction; the lateral supports 3 are symmetrically arranged around the ring-shaped cast thin-walled part 1 and are in an inverted L shape.

[0060] Compared with the direct top pressing method, the method of adding lateral support 3 and casting body pressing block 2 can minimize the problem of deformed ellipse caused by pressing.

Embodiment 3

[0062] A tool for reducing the deformation of ring-shaped cast thin-walled parts after processing, including: a pressure block 2, a lateral support 3, there are multiple pressure blocks 2, and a plurality of lateral supports 3, and the position of the pressure block 2 is cast along the ring The thin-walled parts 1 are evenly distributed in the circumferential direction; the lateral supports 3 are symmetrically arranged around the ring-shaped cast thin-walled part 1 and are in an inverted L shape.

[0063] The support position in the installation height direction of the lateral support 3 is close to the processing position of the inner diameter of the annular cast thin-walled part 1 . In order to better eliminate the influence of inner diameter processing.

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Abstract

The invention relates to a technology and tool for reducing deformation of an annular casting thin-walled part after machining and a casting, and belongs to the field of thin-walled annular part machining. The technology comprises the steps as follows: a pressing block structure is additionally arranged in a lower area of the annular casting thin-walled part; shakeout cleaning treatment is conducted on the surface of the annular casting thin-walled part; then surface sand blasting treatment is conducted, and standing is conducted after sand blasting; lateral supports are symmetrically added tothe side walls of the annular casting thin-walled part, and then inner diameter machining is conducted; the inner diameter machining comprises two steps of rough machining and finish machining, and after the rough machining, all pressing plates and the lateral supports are loosened for standing; and after standing, alignment machining is conducted again. According to the scheme, the influence ofcasting and machining stress is reduced mainly by eliminating reasons causing ellipse; and the deformation problem is solved from the aspects of a clamping method, machining allowance and sequence adjustment.

Description

technical field [0001] The invention belongs to the field of processing thin-walled ring parts, and in particular relates to a process for reducing deformation of ring-shaped cast thin-walled parts after processing. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Due to the need for cooling the cylinder liner of low-speed diesel engines, circulating water cooling is often used in the design. Due to the limitations of the volume and external dimensions and the weight of the product, the water jacket that forms the water chamber with the cylinder sleeve is designed with thin-walled parts. The overall functional design requires good sealing, which requires sufficient struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02C21D7/06B22D29/00C21D1/00C21D9/00
CPCB22C9/02B22D29/00C21D1/00C21D7/06C21D9/0068
Inventor 刘文波丛林王兴涛曲佰法周新国
Owner 中船发动机有限公司
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