Method for forging fuel feed pump driving gear for forklift

A driving gear and fuel pump technology, applied in the direction of wheels, vehicle parts, transportation and packaging, can solve the problems affecting the reliability of the life of the whole machine, and achieve the effect of reducing the scrap rate, high qualification rate and reducing the transformation speed.

Inactive Publication Date: 2015-11-18
安徽蓝博旺机械集团精密液压件有限责任公司
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AI Technical Summary

Problems solved by technology

Under the conditions of mass production, the traditional technology can no longer meet the current design and production needs. Under long-term and high-speed operation, the gear of the oil supply pump is prone to premature failure or fracture, which seriously affects the service life and reliability of the whole machine.

Method used

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Examples

Experimental program
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Embodiment 1

[0023] A method for forging a drive gear of an oil supply pump for a forklift, comprising the following steps:

[0024] a. Pouring steel ingots

[0025] The weight percentage of each chemical composition in the steel ingot is: C0.3%, Mn0.9%, Si2%, Al0.04%, Ti0.1%, Cr1.8%, Zn0.21%, Nd trace ~ 0.30%, Li0.3%, Cu0.06%, Re0.025%, P0.015%, S0.010%, the balance is Fe;

[0026] b. Induction heating of steel ingot:

[0027] In the first step, the temperature is raised from 400°C to 500°C, which takes 100s;

[0028] In the second step, the temperature is raised from 500°C to 580°C in 20 seconds;

[0029] The third step is to raise the temperature from 580°C to 600°C for 50s;

[0030] The fourth step is to raise the temperature from 600°C to 650°C for 30 seconds;

[0031] c. Using one-fire forging, first preheat the pressure hammer and cutting board to 105°C; put the induction-heated steel ingot on the cutting board under the pressure hammer for upsetting to reach the outer circle s...

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PUM

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Abstract

The invention discloses a method for forging a fuel feed pump driving gear for a forklift. According to the method, a steel ingot comprises, by weight, 0.25-0.35% of C, 0.5-1.3% of Mn, 1.5-2.5% of Si, 0.02-0.06% of Al, 0.085-0.12% of Ti, 1.2-2.4% of Cr, 0.16-0.26% of Zn, a trace amount to 0.30% of Nd, 0.2-0.4% of Li, 0.04-0.08% of Cu, a trace amount to 0.025% of Re, smaller than or equal to 0.025% of P, smaller than or equal to 0.030% of S, and the balance Fe. By the adoption of the method, the defects of the prior art are overcome, energy is saved, heat treatment quality is improved, the production cycle is shortened, production cost is reduced, and radiation pollution to a workshop is reduced.

Description

technical field [0001] The invention relates to the field of processing oil supply pumps for forklifts, in particular to a forging method for driving gears of oil supply pumps for forklifts. Background technique [0002] As an important moving part of the oil supply pump, the driving gear of the oil supply pump has high design requirements. At the same time, due to the extremely harsh working conditions of the oil supply pump, the requirements for the gear material, dimensional accuracy, surface roughness, heat treatment, surface strengthening, and dynamic balance of the oil supply pump are very high. strict. Under the conditions of mass production, the traditional technology can no longer meet the current design and production needs. Under long-term and high-speed operation, the gear of the oil supply pump is very easy to fail or break prematurely, which seriously affects the service life and reliability of the whole machine. Contents of the invention [0003] The purpos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/30B21J1/06C22C38/34C22C38/28
Inventor 吕青堂陈栋李文宇
Owner 安徽蓝博旺机械集团精密液压件有限责任公司
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