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Automatable steel plate spring production process

A production process, the technology of automobile steel plate, applied in the field of automobile parts processing, can solve the problems of high cost, no obvious improvement in the service life of physical properties and mechanical properties, and the small application range of materials, etc., to achieve extended service life and high elastic limit , use the effect of safety

Inactive Publication Date: 2019-01-04
四川宏术汽车钢板弹簧有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies in the prior art that the physical properties, mechanical properties, and service life of the leaf spring are not significantly improved, the material application range is small, and the cost is too high, and provide a method that can significantly improve the mechanical properties of the leaf spring. Extended service life, automotive leaf spring production process with a wide range of materials

Method used

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  • Automatable steel plate spring production process
  • Automatable steel plate spring production process
  • Automatable steel plate spring production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Automobile leaf springs are manufactured according to the following process: blanking, straightening, machining, ear rolling, heat treatment, shot blasting, primer, final assembly, preloading, and topcoat. Among them, the steel plate material is 60Si 2 Mn, 50CrVA, SUP9 (55CrMnA), 55SiMnVB, heat treatment according to the following steps:

[0049] a. Place the leaf spring in a heating furnace and heat it. Among them, 60Si 2 Mn steel is heated to 990±20°C, 50CrVA steel is heated to 980±20°C, SUP9 (55CrMnA) steel is heated to 960±20°C, 35SiMnVB steel is heated to 850±20°C, and kept for 50 minutes;

[0050] b. Immerse the leaf spring in an aqueous solution containing 8% sodium chloride and 0.1% polyvinyl alcohol at 60°C, and pass helium into the aqueous solution, quench and cool for 80s;

[0051] c. Rinse the quenched leaf spring, place it in a tempering furnace, heat it to 500-540°C, keep it warm for 50 minutes, and then cool it down to room temperature.

Embodiment 2

[0053] Automobile leaf springs are manufactured according to the following process: blanking, straightening, machining, ear rolling, heat treatment, shot blasting, primer, final assembly, preloading, and topcoat. Among them, the steel plate material is 60Si 2 Mn, heat treatment according to the following steps:

[0054] a. Place the leaf spring in a heating furnace, heat it to 990±20°C, and keep it warm for 25 minutes;

[0055] b. Immerse the leaf spring in an aqueous solution containing 3% sodium chloride and 0.3% polyvinyl alcohol at 40°C, and pass helium into the aqueous solution, quench and cool for 50s;

[0056] c. Rinse the quenched leaf spring, place it in a tempering furnace, heat it to 600°C, keep it warm for 45 minutes, and then cool it down to room temperature.

Embodiment 3

[0058] Automobile leaf springs are manufactured according to the following process: blanking, straightening, machining, ear rolling, heat treatment, shot blasting, primer, final assembly, preloading, and topcoat. Among them, the steel plate material is 60Si 2 Mn, heat treatment according to the following steps:

[0059] a. Place the leaf spring in a heating furnace, heat it to 990±20°C, and keep it warm for 40 minutes;

[0060] b. Immerse the leaf spring in an aqueous solution containing 3% sodium chloride and 0.3% polyvinyl alcohol at 75°C, and pass helium into the aqueous solution, quench and cool for 200s;

[0061] c. Rinse the quenched leaf spring, place it in a tempering furnace, heat it to 500°C, keep it warm for 90 minutes, and then cool it down to room temperature.

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Abstract

The invention discloses an automatable steel plate spring production process which comprises steps of material discharge, straightening, mechanical processing, lug coiling, thermal treatment, shot blasting, undercoating, total assembling, pre-pressing and finish coating. The process is characterized in that the step of thermal treatment comprises the following steps: a, heating a steel plate spring to Ac3 or greater at 40-50 DEG C in a heating furnace, and keeping the temperature; b, soaking the steel plate spring into a solution with 3-8% of sodium chloride and 0.1-0.3% of polyvinyl alcohol at 40-75 DEG C, introducing helium into the solution, and carrying out quenching cooling; c, carrying out spraying washing on the quenched steel plate spring, putting into an annealing furnace, heatingtill a critical temperature, keeping the temperature, and cooling to the room temperature. A special quenching medium is used in the process, and tests show that for most common steel in the market,such as 55Si2Mn, 60Si2Mn and 5SiMnVB, the process has very good hardenability, is free of pollution, free of fire, and safe to use.

Description

technical field [0001] The invention belongs to the technical field of auto parts processing, and relates to a production process of an auto leaf spring. Background technique [0002] Suspension is one of the main assemblies of modern cars. It can elastically connect the frame to the axle. Its main task is to transmit all the forces and moments acting between the frame and the wheels, and to ease the damage caused by uneven road surfaces. The impact load transmitted to the body attenuates the vibration of the bearing system caused by the impact load to ensure the normal running of the car. Suspension usually consists of elastic elements, guiding mechanism and shock absorbing device. Most of the elastic elements in the world are leaf springs. [0003] Automobile leaf springs are generally composed of several pieces of alloy spring steel with unequal lengths to form a group of similar-strength spring beams. Due to the harsh working conditions of leaf springs, they are vulner...

Claims

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Application Information

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IPC IPC(8): C21D9/02C21D1/18C21D1/60C21D1/58
CPCC21D9/02C21D1/18C21D1/58C21D1/60
Inventor 卢德波
Owner 四川宏术汽车钢板弹簧有限公司
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