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Hydraulic motor cushion block and preparation method thereof

A technology of hydraulic motors and pads, which is applied to mechanical equipment, machines/engines, solid-state diffusion coatings, etc., can solve problems such as low material utilization, high production costs, and low processing efficiency, and achieve simple procedures and reduced processing costs , The effect of improving production efficiency

Inactive Publication Date: 2020-08-11
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

This kind of processing and production method has low processing efficiency, high production cost and low material utilization rate.

Method used

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  • Hydraulic motor cushion block and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Mixing materials: take by weight 1.7% nickel, 0.5% vanadium, 0.5% manganese sulfide, 0.8% graphite, 0.7% zinc stearate, 0.06% spindle oil, and the balance is iron powder, and mix well to obtain Matrix mixed powder: Weigh 2.7% iron, 0.5% lithium stearate, and the remaining copper powder in proportion, and mix them evenly to obtain copper-infiltrated sheet mixed powder;

[0027] (2) Compressing the green compact: adding the matrix mixed powder and the copper infiltrated sheet mixed powder into the block mold and the copper infiltrated sheet mold respectively, and pressing and forming respectively to obtain the matrix compact and the copper infiltrated sheet; wherein, the density of the matrix compact is 6.8g / cm 3 , the density of copper infiltrated sheet is 7.5g / cm 3 ;

[0028] (3) Copper-infiltrated sintering: place the copper-infiltrated sheet on the top surface of the substrate compact, and sinter in a sintering furnace with decomposed ammonia gas as a protective...

Embodiment 2

[0033] (1) Mixing materials: take by weight 1.5% nickel, 0.3% vanadium, 0.3% manganese sulfide, 0.6% graphite, 0.6% zinc stearate, 0.03% spindle oil, and the balance is iron powder, and mix well to obtain Matrix mixed powder; weigh 2.5% iron, 0.4% micro-wax powder, and the remaining copper powder in proportion, and mix them evenly to obtain copper-infiltrated sheet mixed powder;

[0034] (2) Compressing the green compact: adding the matrix mixed powder and the copper infiltrated sheet mixed powder into the block mold and the copper infiltrated sheet mold respectively, and pressing and forming respectively to obtain the matrix compact and the copper infiltrated sheet; wherein, the density of the matrix compact is 6.81g / cm 3 , the density of copper infiltrated sheet is 7.47g / cm 3 ;

[0035] (3) Copper-infiltrated sintering: place the copper-infiltrated sheet on the top surface of the substrate compact, and sinter in a sintering furnace with decomposed ammonia gas as a protecti...

Embodiment 3

[0038] (1) Mixing: Take by weight 2% nickel, 0.7% vanadium, 0.6% manganese sulfide, 1.2% graphite, 1.2% zinc stearate, 0.12% spindle oil, and the balance is iron powder, and mix well to get Matrix mixed powder: Weigh 3.5% iron, 0.65% lithium stearate, and the remaining copper powder in proportion, and mix evenly to obtain copper infiltrated sheet mixed powder;

[0039] (2) Compressing the green compact: adding the matrix mixed powder and the copper infiltrated sheet mixed powder into the block mold and the copper infiltrated sheet mold respectively, and pressing and forming respectively to obtain the matrix compact and the copper infiltrated sheet; wherein, the density of the matrix compact is 6.77g / cm 3 , the density of copper infiltrated sheet is 7.53g / cm 3 ;

[0040] (3) Copper-infiltrated sintering: place the copper-infiltrated sheet on the top surface of the substrate compact, and use decomposed ammonia gas as a protective atmosphere to sinter in a sintering furnace wit...

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Abstract

The invention discloses a hydraulic motor cushion block and a preparation method thereof. The preparation method comprises the following steps that nickel, vanadium, manganese sulfide, graphite, zincstearate, spindle oil and iron powder are weighed according to a weight ratio and uniformly mixed to obtain matrix mixed powder; copper powder, iron and an adhesive are weighed and uniformly mixed toobtain copper-infiltrated sheet mixed powder; the matrix mixed powder and the copper-infiltrated sheet mixed powder are added into corresponding molds and pressed and formed to obtain a matrix pressedblank and a copper-infiltrated sheet; the copper-infiltrated sheet is placed on the top end face of the matrix pressed blank, and copper infiltration sintering is carried out in a protective atmosphere to form a sintered blank; two-end-face machining and counter bore machining are carried out on the sintered blank to obtain a matrix blank; and surface sand blasting treatment and surface coating are carried out on the matrix blank to obtain the hydraulic motor cushion block. The cushion block prepared through the method is excellent in performance and has good strength, toughness and frictional wear performance; and the preparation method is simple in process, high in production efficiency and low in machining cost.

Description

technical field [0001] The invention belongs to the field of engineering machinery hydraulic motor components, and in particular relates to a hydraulic motor cushion block and a preparation method thereof. Background technique [0002] The hydraulic motor is the key actuator in the hydraulic system of construction machinery. The material of the friction pair is its key part. Its friction and wear performance directly determines the performance and life of the motor. The hydraulic motor cushion forms a pair of friction with the oil distribution plate in the hydraulic motor. Vice, under low pressure and heavy load, the cushion block and the oil distribution plate produce relative motion to complete the sealing and dredging of the oil passage, which requires the cushion block to have better friction and wear performance. In order to meet this requirement, the prior art uses high-manganese brass as a raw material, which is machined into a shape, then finished, and then surface-c...

Claims

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Application Information

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IPC IPC(8): B22F3/02B22F3/10B22F3/24B22F3/26B22F5/00C22C9/00C22C38/04C22C38/08C22C38/12C23C10/28F03C1/08
CPCB22F3/02B22F3/1007B22F5/00B22F3/26B22F3/24C22C38/08C22C38/12C22C38/002C22C38/04C22C9/00C23C10/28F03C1/08B22F2003/247
Inventor 汤浩张东张俊杰程卫
Owner 合肥波林新材料股份有限公司
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