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Processing process for small crescent block of inner meshing gear pump

An internal gear pump and processing technology, applied in the field of hydraulic pump manufacturing, can solve the problems of low precision of parts, slow wire cutting processing speed, poor surface roughness, etc., to improve the yield rate, good compactness and increase wear resistance. sexual effect

Active Publication Date: 2016-05-11
淮安福斯特液压科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low wire cutting processing speed, low precision and poor surface roughness of the finished parts in the processing process of the existing internal gear pump small crescent block

Method used

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  • Processing process for small crescent block of inner meshing gear pump
  • Processing process for small crescent block of inner meshing gear pump
  • Processing process for small crescent block of inner meshing gear pump

Examples

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Embodiment 1

[0025] A small crescent block processing technology for internal gear pumps, taking a small crescent block with an outer diameter of 80mm, an inner diameter of 70mm, and a width of 50mm as an example, it is produced according to the following steps:

[0026] 1. Use the hot extrusion process to make long strips of small crescent block profiles: first design and manufacture the mold according to the section of the small crescent block, and use the extruder to extrude the heated round casting rod from the mold;

[0027] 2. Cut the strip-shaped small crescent block profile into a semicircular sheet-shaped small crescent block according to a certain length;

[0028] 3. Put the semicircular sheet-shaped small crescent block 13 into the end face grinding fixture and grind one end face on a surface grinder. After grinding, turn the product into a clamp and grind the other end face;

[0029] 4. Put the product into the jig for grinding the outer circle and clamp it, then roughly grind ...

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Abstract

The invention discloses a processing process for a small crescent block of an inner meshing gear pump. The processing process comprises the steps of: preparing a striped small crescent block profile by a hot extrusion process, cutting into a semicircular small crescent block, placing the semicircular small crescent block in an end surface grinding clamp, grinding one end surface of a plane grinding machine, reversely clamping a ground product, grinding the other end surface, then clamping the product with an excircle grinding clamp, roughly grinding an excircle and finely grinding. By arranging the end surface grinding clamp, the verticality between the end surfaces and the excircle of the small crescent block can be ensured, and the end surface processing efficiency is improved; and by adopting the hot extrusion process, the material compactness is better, the hardness is improved, the wear resistance is increased, and the production efficiency is improved by 5-10 times in comparison with that of line cutting.

Description

technical field [0001] The invention relates to the technical field of hydraulic pump manufacturing, in particular to a processing technology for a small crescent block of an internal meshing gear pump. Background technique [0002] The small crescent block is a component that separates the high and low pressure oil areas in the internal gear pump. It is usually paired with the large crescent block. The material is generally tin bronze. Its shape is a semicircular sheet structure. Precision has the greatest impact on the entire pump. The conventional method is to use wire cutting, but the speed of wire cutting is slow, and the parts after processing have low precision and poor surface roughness, which restricts the development of internal gear pumps to a certain extent. So there is an urgent need for a new process to manufacture small crescent blocks. Contents of the invention [0003] The purpose of the present invention is to solve the problems of slow wire cutting proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B24B41/06
CPCB23P15/00B24B41/06
Inventor 不公告发明人
Owner 淮安福斯特液压科技有限公司
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