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Hot pressing method for height adjustment of ultrahigh cylindrical helical spring

A height-adjusting, spiral-type technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve problems such as the spring modulus of the finished spring height does not meet the requirements, accelerate the aging of manufacturing settings, and have many process steps, so as to save energy and labor. , Improve the qualification rate and reduce the cost

Inactive Publication Date: 2012-07-04
SHANDONG NINGJIN SPRING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the manufacture of high-strength springs used in large machinery, due to many process steps, unstable process conditions, complex parameter control, high strength of spring materials, etc., there are usually problems in completing the product through multiple manufacturing steps After manufacturing, it is found that the free height or load height of the finished spring exceeds the specified standard free height, which leads to the height and spring modulus of the finished spring not meeting the regulations and cannot be used. Generally, it can only be discarded or heat treated in the same way as a new spring. remanufacturing under conditions, thereby wasting material and energy, and accelerating the aging of manufacturing settings, making the cost of manufacturing springs higher

Method used

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  • Hot pressing method for height adjustment of ultrahigh cylindrical helical spring
  • Hot pressing method for height adjustment of ultrahigh cylindrical helical spring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] like figure 1 As shown, the height adjustment method of the ultra-high cylindrical helical spring, the spring is made of 60Si2CrVAT material, its standard free height is 290mm, the material diameter is 36mm, the middle diameter is 150mm, the number of effective turns is 6.2, and the elastic modulus is 78.5 ×10 3 MPa. It is measured that the super high spring exceeds the standard free height by 3mm, which is actually 293mm.

[0016] Before repairing the spring for this problem, the tempering temperature T for rolling the material to form the spring is determined to be 545°C and the tempering time S is 108 minutes through the process card.

[0017] Adjust the temperature of the tempering furnace to T1 545°C, set the tempering time to S1 108 minutes, and when the displayed temperature reaches the specified temperature, turn on the mesh belt motor; put the problem spring 1 into the tempering furnace, and temper for more than 108 minutes Re-shaping; use a hydraulic press ...

Embodiment 2

[0021] The height adjustment method of the ultra-high cylindrical helical spring, the spring material is 60Si2CrA, its material diameter under normal conditions is 35mm, the middle diameter is 143mm, the free height is 501mm, the effective number of turns is 7.1, and the elastic modulus is 78.5 ×10 3 MPa, the measured super high spring exceeds the standard free height by 5mm.

[0022] Before repairing the spring for this problem, the tempering temperature T for rolling the material to form the spring is determined to be 415°C and the tempering time S is 90 minutes through the process card.

[0023] Adjust the temperature of the tempering furnace to T1 395°C, set the tempering time to S1 70 minutes, when the displayed temperature reaches the specified temperature, turn on the mesh belt motor; put the problem spring 1 into the tempering furnace, and temper for 70 minutes Reshaping; thermally compress the tempered spring 1 without cooling, and press the spring to the required he...

Embodiment 3

[0027] The height adjustment method of the ultra-high cylindrical helical spring, the material of the spring is 60Si2CrVA, the material diameter under normal conditions is 25mm, the middle diameter is 175mm, the free height is 255mm, the effective circle is 3.2, and the elastic modulus is 78.5× 10 3 MPa, the super high spring exceeds the standard free height by 2mm after measurement.

[0028] Before repairing the spring for this problem, the tempering temperature T for rolling the material to form the spring is determined to be 515°C and the tempering time S is 80 minutes through the process card.

[0029] Adjust the temperature of the tempering furnace to T1 500°C, set the tempering time to S1 65 minutes, and when the displayed temperature reaches the specified temperature, turn on the mesh belt motor; put the problem spring 1 into the tempering furnace, and temper for more than 65 minutes Reshaping; thermally compress the tempered spring 1 without cooling, and press the spr...

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Abstract

The invention relates to a hot pressing method for height adjustment of an ultrahigh cylindrical helical spring. The method comprises the following steps that: the temper temperature T and the temper time S of ultrahigh cylindrical helical spring material in a rolling process are determined; in the temperature T1, the ultrahigh cylindrical helical spring is heated for the time S1; and under the condition without cooling, the ultrahigh cylindrical helical spring is mechanically compacted so as to reach a standard free height, wherein the temperature T1=T or T1=T-(10 to 20) degrees, and the time S1=S or S1=S-(10 to 20) minutes. The method disclosed by the invention has the advantages of simple process and convenience for operation, the percent of pass of the finished product spring can be increased, the waste of the spring material is avoided, the energy source and labor force are saved, the cost is reduced, and the like.

Description

technical field [0001] The invention relates to a method for adjusting the height of an ultra-high cylindrical helical spring, in particular to a hot pressing method for adjusting the height of an ultra-high cylindrical helical spring. Background technique [0002] The manufacturing process of cylindrical helical spring includes blanking, rolling, heat treatment, hardness inspection, process compression, shot peening, process compression, finished product inspection, flaw detection, painting, inspection, packaging, and storage. For the manufacture of high-strength springs used in large machinery, due to many process steps, unstable process conditions, complex parameter control, high strength of spring materials, etc., there are usually problems in completing the product through multiple manufacturing steps After manufacturing, it is found that the free height or load height of the finished spring exceeds the specified standard free height, which leads to the height and sprin...

Claims

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Application Information

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IPC IPC(8): C21D8/06C21D9/02
Inventor 高建宝韩红权
Owner SHANDONG NINGJIN SPRING
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