A face grinding process of a wear-resistant disc of a hydraulic motor

A processing technology and hydraulic motor technology, which is applied in metal material coating technology, manufacturing tools, furnaces, etc., can solve the problems of easy deformation and unequal end faces of heat treatment, achieve excellent performance, improve processing efficiency, and ensure parallelism.

Active Publication Date: 2021-10-22
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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  • A face grinding process of a wear-resistant disc of a hydraulic motor
  • A face grinding process of a wear-resistant disc of a hydraulic motor
  • A face grinding process of a wear-resistant disc of a 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 requir...

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, which comprises the following steps: S1: turning and milling; selecting 20CrMo steel as the blank of the wear-resistant disc, and preheating the rough blank of the wear-resistant disc, Then carry out turning and milling; obtain the wear-resistant disc body; S2: heat treatment; in the low-pressure vacuum carburizing gas quenching furnace, perform low-pressure vacuum carburizing and high-pressure gas quenching on the wear-resistant disc body; S3: coarse grinding End face; S4: sulfurizing treatment; S5: finely grinding the end face; finely grinding the wear-resistant disk embryo body after the sulfurizing treatment in step S4 to obtain a finished wear-resistant disk. The motor wear-resistant plate processed by the present invention has tolerance ≤0.002mm, flatness ≤0.002mm, parallelism ≤0.01mm, roughness Rz0.7‑0.9μm, surface hardness 75‑96HRC, which meets the design requirements of drawings, and the surface Retained austenite and carbide are both grade 1, meeting the requirements of industry standards.

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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Patent Type & Authority Patents(China)
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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