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Compression treatment method of hot coil spring

A technology of a hot coil spring and a processing method, which is applied in the field of mechanical parts processing, can solve the problems of the reduced ability of the hot coil spring to restore deformation, the limited compression resistance of the hot coil spring, and the high spring replacement frequency, so as to reduce the replacement frequency and shorten the leakage. Nitrogen time, the effect of reducing maintenance costs

Inactive Publication Date: 2020-02-04
界首市锦田农业机械装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Hot coil spring is also called large spring, because this kind of spring generally has a large wire diameter, reaching 16~200mm. The production process adopts hot coil technology. The giant spring is easy to twist and form after heating, and the resilience is small. After forming, it needs to be quenched and then returned. Fire treatment, hot coil springs can be used in national defense, marine, aerospace, railway, nuclear power, wind power, thermal power, construction machinery, mining machinery, construction machinery, elevators, etc., supporting or replacing hot coil springs on equipment such as steel mills and domestic power plants , hot coil springs are widely used in my country's industrial production process, but because of the large wire diameter of hot coil springs, the pressure they bear during use is relatively large. During the continuous use of hot coil springs, the compressive capacity will be reduced. Gradually consumed, the ability of the hot coil spring to recover from deformation is gradually reduced, and the frequency of spring replacement is high. The replacement and maintenance of anti-corrosion will obviously delay industrial production. Therefore, it is necessary to improve the compressive capacity of the hot coil spring
[0003] The existing patent document CN101125402 discloses a processing method of a hot coil spring with a spring wire diameter of 90 mm. It specifically discloses quenching, tempering, testing, shot blasting and surface treatment after the spring wire is heated and formed. The surface treatment is to spray paint Therefore, the processing of the spring after the preparation of the patent document is simple, and the internal structure of the spring can only be slightly improved by heating during molding. Further improvements to the spring handling process

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] A compression-resistant treatment method for a hot coil spring, comprising the following steps:

[0023] Place the formed hot-rolled spring in a sodium bicarbonate solution with a concentration of 3% by mass, ultrasonicate it at 40°C and 27kHz for 30 minutes, rinse it with clean water, and remove the stains on the surface of the hot-rolled spring, which is convenient for post-processing and improves post-processing Effect, polishing, to get the cleaning parts; then put the cleaning parts in the heating kettle, heat to 430 ℃ in vacuum at 3 ℃ / min, the vacuum degree is -27MPa, keep the temperature for 55 minutes, continue to heat to the temperature of 940 ℃, keep the temperature for 70 minutes, put In the quenching liquid, the quenching liquid is a mixed PAG quenching liquid, and the preparation method is: add a fatty acid zinc solution with a mass percentage concentration of 5-6% into the PAG quenching liquid, and the added volume is 13% of the volume of the PAG quenching ...

Embodiment 2

[0025] A compression-resistant treatment method for a hot coil spring, comprising the following steps:

[0026] Place the formed hot-rolled spring in a sodium bicarbonate solution with a concentration of 3.5% by mass, ultrasonicate it at 43°C and 28kHz for 35 minutes, rinse it with clean water, and remove the stains on the surface of the hot-rolled spring, which is convenient for post-processing and improves post-processing Effect, polishing, to get cleaning parts; then put the cleaning parts in the heating kettle, heat at 3.5 ℃ / min to 450 ℃ in vacuum, the vacuum degree is -28MPa, keep warm for 60 minutes, continue to heat to 960 ℃, keep warm for 75 minutes, put In the quenching liquid, the quenching liquid is a mixed PAG quenching liquid. The preparation method is: add a fatty acid zinc solution with a mass percentage concentration of 5.5% into the PAG quenching liquid, and the added volume is 14% of the volume of the PAG quenching liquid, and mix well to obtain Mixed PAG que...

Embodiment 3

[0028] A compression-resistant treatment method for a hot coil spring, comprising the following steps:

[0029] Place the formed hot-rolled spring in a sodium bicarbonate solution with a concentration of 4% by mass, ultrasonicate at 45°C and 29kHz for 40 minutes, rinse with clean water, remove the stains on the surface of the hot-rolled spring, facilitate post-processing, and improve post-processing Effect, polishing, to get cleaning parts; then put the cleaning parts in the heating kettle, heat at 4℃ / min to 470℃ under vacuum, the vacuum degree is -29MPa, keep warm for 65min, continue to heat to 980℃, keep warm for 80min, put In the quenching liquid, the quenching liquid is a mixed PAG quenching liquid. The preparation method is: add a fatty acid zinc solution with a mass percentage concentration of 6% into the PAG quenching liquid, and the added volume is 15% of the volume of the PAG quenching liquid, and mix well to obtain Mixed PAG quenching liquid, naturally lowered to roo...

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Abstract

The invention mainly relates to the technical field of mechanical part machining, and discloses a compression treatment method of a hot coil spring. The compression treatment method of the hot coil spring includes the steps of cleaning, quenching, tempering, nitriding, heat treatment and coating. The compression treatment method of the hot coil spring is simple. The prepared hot coil spring has high strength and strong compression and fatigue resistance, good elastic deformation is maintained, the service life is significantly prolonged, the frequency of hot coil spring replacement on machinesis reduced, the maintenance cost and the production cost are reduced, and industrial production is facilitated.

Description

technical field [0001] The invention mainly relates to the technical field of machining of mechanical parts, in particular to a compression-resistant treatment method of a hot-rolled spring. Background technique [0002] Hot coil spring is also called large spring, because this kind of spring generally has a large wire diameter, reaching 16~200mm. The production process adopts hot coil technology. The giant spring is easy to twist and form after heating, and the resilience is small. After forming, it needs to be quenched and then returned. Fire treatment, hot coil springs can be used in national defense, marine, aerospace, railway, nuclear power, wind power, thermal power, construction machinery, mining machinery, construction machinery, elevators, etc., supporting or replacing hot coil springs on equipment such as steel mills and domestic power plants , hot coil springs are widely used in my country's industrial production process, but because of the large wire diameter of ho...

Claims

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Application Information

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IPC IPC(8): C21D1/18C21D1/773C21D9/02C23C8/26C23G1/19
CPCC21D1/18C21D1/773C21D9/02C23C8/26C23G1/19
Inventor 纪小坤
Owner 界首市锦田农业机械装备有限公司
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