End face grinding process of wear-resistant disc of hydraulic motor

A processing technology, hydraulic motor technology, applied in metal material coating technology, manufacturing tools, coating, etc., can solve the problems of easy deformation and unequal end faces of heat treatment, achieve excellent performance, reduce processing time, and improve surface quality Effect

Active Publication Date: 2020-06-16
WUXI YINGBEI PRECISION BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an end face grinding process of a hydraulic motor wear disc, which solves the problems that the heat treatment end face of the current wear disc is easily deformed and the end face is uneven

Method used

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  • End face grinding process of wear-resistant disc of hydraulic motor
  • End face grinding process of wear-resistant disc of hydraulic motor
  • End face grinding process of wear-resistant disc of hydraulic motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 The end face grinding process of a hydraulic motor wear plate shown includes the following steps:

[0042] S1: turning, milling

[0043] 20CrMo steel is selected as the wear-resistant disc blank, and the wear-resistant disc blank is preheated, and then turned and milled to obtain a wear-resistant disc blank;

[0044] Wherein: the 20CrMo steel described in step S1 includes the following raw materials in mass percentage: 0.17% carbon, 0.17% silicon, 0.4% manganese, 0% sulfur, 0% phosphorus, 0.80% chromium, 0.15% molybdenum , 0% nickel, 0% copper, and the balance is iron;

[0045] Pretreatment: Put the wear-resistant disc blank into a vacuum low-pressure carburizing and high-pressure gas quenching furnace, under the protection of Ar gas, heat up to 650-770°C, keep it for 0.5h, then anneal to 530-540°C, keep it for 2 hours -3h, then cool down to room temperature; turning and milling: the 20CrMo steel to be processed will meet the thickness (drawings requ...

Embodiment 2

[0059] Such as figure 1 The end face grinding process of a hydraulic motor wear plate shown includes the following steps:

[0060] S1: turning, milling

[0061] 20CrMo steel is selected as the wear-resistant disc blank, and the wear-resistant disc blank is preheated, and then turned and milled to obtain a wear-resistant disc blank;

[0062] Wherein: the 20CrMo steel described in step S1 includes the following raw materials in mass percentage: 0.24% carbon, 0.37% silicon, 0.70% manganese, 0.025% sulfur, 0.035% phosphorus, 1.10% chromium, 0.25% molybdenum , 0.3% nickel, 0.3% copper, and the balance is iron;

[0063] Pretreatment: Put the wear-resistant disc blank into the vacuum low-pressure carburizing and high-pressure gas quenching furnace, under the protection of Ar gas, heat up to 650-770°C, keep it for 0.5h, then anneal to 530-540°C, keep it for 3h , and then cool down to room temperature; turning and milling: the 20CrMo steel to be processed will meet the thickness (th...

Embodiment 3

[0077] Such as figure 1 The end face grinding process of a wear-resistant disc of a hydraulic motor is shown, including the following steps:

[0078] S1: turning, milling

[0079] 20CrMo steel is selected as the wear-resistant disc blank, and the wear-resistant disc blank is preheated, and then turned and milled to obtain a wear-resistant disc blank;

[0080] Wherein: the 20CrMo steel described in step S1 includes the following raw materials in mass percentage: 0.20% carbon, 0.30% silicon, 0.55% manganese, 0.015% sulfur, 0.02% phosphorus, 0.9% chromium, 0.19% molybdenum , 0.15% nickel, 0.15% copper, and the balance is iron;

[0081] Pretreatment: Put the wear-resistant disc blank into a vacuum low-pressure carburizing and high-pressure gas quenching furnace, under the protection of Ar gas, heat up to 680-730°C, keep it for 0.5h, then anneal to 530-540°C, keep it for 2h , and then cool down to room temperature; turning and milling: the 20CrMo steel to be processed will meet ...

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Abstract

The invention discloses an end face grinding process of a wear-resistant disc of a hydraulic motor. The end face grinding process comprises the following steps that S1, turning and milling are carriedout, specifically, 20CrMo steel is selected as a wear-resistant disc blank, the wear-resistant disc blank is preheated, then turned and milled, and the wear-resistant disc blank body is obtained; S2,heat treatment is carried out, specifically, in a low-pressure vacuum carburizing gas quenching furnace, the wear-resistant disc blank body is treated by low-pressure vacuum carburizing and high-pressure gas quenching; S3, rough grinding of the end face is carried out; S4, sulfurizing treatment is carried out; and S5, fine grinding of the end face is carried out, specifically, fine grinding is carried out on the wear-resistant disc blank body after the sulphurizing treatment in step S4, and the finished wear-resistant disc is obtained. According to the machined wear-resistant disc of the motor, a tolerance is less than or equal to 0.002mm, flatness is less than or equal to 0.002mm, a parallelism is less than or equal to 0.01mm, a roughness is Rz0.7-0.9[mu]m, a surface hardness is 75-96HRC, the requirements of the drawing design are met, and surface residual austenite and carbide are of grade 1, and the requirements of the industry standard are met.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, in particular to an end face grinding process of a wear-resistant disc of a hydraulic motor. Background technique [0002] Hydraulic motors, also known as oil motors, are mainly used in injection molding machinery, ships, hoists, construction machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, ship machinery, petrochemical, port machinery, etc.; and wear-resistant discs are It is an important part of the hydraulic end system in the hydraulic motor. The heat-treated wear plate has high hardness and good wear resistance. One end is fixed in the motor system, and the other end cooperates with the sliding shoe assembly. [0003] As a low carbon steel, 20CrMo steel has the advantages of no temper brittleness, good weldability, small tendency to form fractures, machinability, good cold strain plasticity, toughness and ideal high temperat...

Claims

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Application Information

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IPC IPC(8): B23P15/00C21D1/18C21D9/00C22C38/02C22C38/04C22C38/42C22C38/44C23C8/34
CPCB23P15/00C21D1/18C21D9/0068C22C38/02C22C38/04C22C38/42C22C38/44C23C8/34
Inventor 王伟蔡中辉
Owner WUXI YINGBEI PRECISION BEARING
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