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Automobile leaf spring free quenching technology

A technology of automobile plate and freedom, which is applied in the direction of quenching agent, quenching device, manufacturing tools, etc., can solve the problems of affecting the quality of leaf spring, unscientific coordination of contact cooling speed, hardenability and hardness of leaf spring cannot be consistent, etc. , to achieve efficient production and improve the effect of quenching quality

Inactive Publication Date: 2018-10-19
SHANDONG LEOPARD AUTOMOTIVE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unscientific coordination of the contact cooling rate between the quenching medium and the quenching liquid and the workpiece in the existing quenching technology, the hardenability and hardness of the leaf spring after heat treatment cannot be consistent, which affects the quality of the leaf spring

Method used

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  • Automobile leaf spring free quenching technology
  • Automobile leaf spring free quenching technology

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Embodiment Construction

[0031] A kind of automobile leaf spring free quenching process of the present invention comprises the following steps:

[0032] (1) Heat the reed to 860°C to 920°C in a step-by-step quenching furnace, and keep it warm for 20-25min;

[0033] (2) The reeds are sorted out according to the length of ≤700mm, 700-900mm, 900-1300mm, and ≥1300mm;

[0034] (3) After the reed is moved to the forming platform by the robot, it is formed by chain-type pressing;

[0035] (4) Set rapid quenching oil in the quenching oil tank, and the reed is directly sent into the quenching oil tank in a free state by the forming platform, and the temperature of the reed when entering the oil tank is 840°C to 860°C. Set circulation device, stirring device and Venturi nozzle in the oil tank, so that the rapid quenching oil can quickly wash the reed at a flow rate of 0.5-0.7m / s, so that the reed can cool the reed to below 400°C within 10 seconds. To achieve the purpose of free quenching.

[0036] Described ...

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Abstract

The invention discloses an automobile leaf spring free quenching technology, and belongs to the technical field of leaf spring machining heat treatment technologies. The automobile leaf spring free quenching technology is characterized by comprising the following steps that firstly, reeds are heated to 860 DEG C-920 DEG C in a stepping type quenching heating furnace, and heat preservation is conducted for 20-25 min; secondly, the reeds are sorted and discharged out of a furnace according to the lengths, wherein the lengths are smaller than or equal to 700 mm, are 700-900 mm, are 900-1,300 mm and are larger than or equal to 1,300 mm correspondingly; thirdly, after the reeds are moved to a forming platform through a robot, chain type overburden pressure forming is adopted; and fourthly, rapid quenching oil is set in a quenching oil groove, the forming platform is used for directly conveying the reeds into the quenching oil groove in a free state, the reeds are quenched within 30 s from furnace discharging to oil entry. According to the automobile leaf spring free quenching technology, the reed quenching quality can be improved while efficient production is achieved.

Description

technical field [0001] The invention belongs to the technical field of heat treatment technology for leaf spring processing, and in particular relates to a free quenching technology for automobile leaf springs. Background technique [0002] Leaf Spring Leaf Spring is the most widely used elastic element in automobile suspension. It is composed of several alloy spring sheets with equal width but unequal length (the thickness can be equal or not). An elastic beam of approximately equal strength. When the leaf spring is installed in the automobile suspension and the vertical load it bears is positive, each spring leaf is deformed by force and tends to arch upward. At this time, the axle and frame are close to each other. When the axle and frame move away from each other, the positive vertical load and deformation of the leaf spring gradually decreases, and sometimes even reverses. The flat rectangular steel plate is curved, and the chassis is made of several stacked springs....

Claims

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Application Information

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IPC IPC(8): C21D1/58C21D1/64C21D9/02C21D1/18
CPCC21D1/18C21D1/58C21D1/64C21D9/02
Inventor 孟宪芸王治宝秦立富
Owner SHANDONG LEOPARD AUTOMOTIVE HLDG
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