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Manufacturing method of plunger pump return disc

A manufacturing method and a return plate technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as complex procedures, low material utilization rate, and low production efficiency, and achieve simple procedures, improved production efficiency, and improved production efficiency Effect

Active Publication Date: 2016-12-14
合肥波林新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, machining and die forging are mostly used for manufacturing return discs. For example, the Chinese patent document with application number 201510725216.9 discloses a manufacturing method for forming return discs by closed die forging; for example, application number 201110269432.9 The Chinese patent document discloses a manufacturing method of forming a return plate by cold heading stamping of 42CrMo steel; in the prior art, the return plate is formed by machining or die forging, which has low material utilization rate, complicated process, and low production efficiency. question

Method used

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  • Manufacturing method of plunger pump return disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0022] A method for manufacturing the return disk of a plunger pump includes the following steps:

[0023] Mixing: Weigh the raw materials according to the weight percentage content of each component in Table 1. Iron powder is reduced iron powder; add spindle oil to iron powder, mix for 20-200min to form oily iron powder, and then combine oily iron powder and stearic acid Zinc and graphite are added to the blender and mixed. The graphite grade is 299, and the copper powder is electrolytic copper powder. After mixing evenly, take it out to obtain mixed powder;

[0024] Press compaction: install the return plate mold on the press, fill the mixed powder into the mold cavity, and press the mixed powder into a return plate compact with a density of 6.6~6.9g / cm 3 ;

[0025] Copper infiltration and sintering: Place the copper infiltration sheet above the return disc compact, and perform copper infiltration and sintering in a protective atmosphere at a sintering temperature of 1095 to 1150°C...

Embodiment 3-5

[0030] The difference from Example 1-2 is that in the mixing step, the graphite grade is 399; the iron powder is atomized iron powder. The performance test of the manufactured return disk is shown in Table 2.

[0031] Table 1 Proportion Table of Examples 1-5 of Return Disk (wt%)

[0032]

[0033] Table 2 The performance test results of the return disk prepared in Examples 1-5

[0034] performance

[0035] The test running time of the backhaul disk mounting machine made by the invention is more than 300h, which fully meets the working conditions.

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Abstract

The invention discloses a manufacturing method of a plunger pump return disc, and belongs to the field of plunger pump parts. The method comprises the following steps that raw materials are weighed according to the weight percentage: spindle oil is added into iron powder, the spindle oil and the iron powder are evenly mixed to form oily iron powder, the oily iron powder, copper powder, zinc stearate and graphite are added into a mixing machine to be evenly mixed, and mixed powder is obtained; a return disc mold is mounted on a pressure machine, a mold cavity is filled with the mixed powder, and the mixed powder is pressed into a return disc pressing blank; a copper infiltration piece is placed above the return disc pressing blank, copper infiltration sintering is carried out, and a sintering blank is formed; and burr removing is carried out, and a finished plunger pump return disc product is machined. The spindle oil is added into the iron powder, segregation of graphite is reduced, and uniformity of the mixed powder is increased; copper infiltration sintering is carried out, so that a material has the good toughness and anti-seizure performance; and working procedures of mixing, pressure blank pressing, copper infiltration sintering and the like are adopted, the working procedures are simple, the material utilization rate is improved, the production efficiency is high, and the production efficiency is improved.

Description

Technical field [0001] The invention belongs to the field of high-pressure plunger pump hydraulic products, in particular to a method for manufacturing a plunger pump return plate. Background technique [0002] The return plate is one of the key core parts of the axial plunger hydraulic pump. It forms a return device together with the return spring and the spherical hinge when the plunger pump sucks oil, and presses the shoe tightly on the surface of the swash plate to slide. In the prior art, most of the process methods for manufacturing the return disk use machining and die forging. For example, the Chinese patent document with the application number 201510725216.9 discloses a manufacturing method for forming the return disk by closed die forging; for example, the application number is 201110269432.9 The Chinese patent document of the United States discloses a method for manufacturing the return disk using 42CrMo steel cold forging and stamping; the prior art adopts machining o...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/02B22F3/10B22F3/24C22C38/16B22F5/00
CPCC22C38/16B22F3/02B22F3/1007B22F3/24B22F5/00B22F2003/023B22F2003/247B22F1/10
Inventor 汤浩张东李其龙张俊杰孙本松吴亚民
Owner 合肥波林新材料股份有限公司