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Machining method of wave spring

A wave spring and processing method technology, applied in the field of spring manufacturing, can solve the problems of easily causing cracks, unable to meet the requirements of drawings, difficult to maintain the shape, etc.

Inactive Publication Date: 2015-10-28
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the 3J68 material high temperature elastic alloy semi-cold hardened strip with a wall thickness of 3.5±0.05mm, the part rebounds after cold forming, and it is very difficult to maintain the shape after cold forming, and it is easy to cause cracks, which cannot meet the requirements of the drawing
The existing detection method of wave spring is: use 0-100N standard elastic testing machine to detect the elastic force, and the diameter of the tray of the 0-100N standard elastic testing machine is 50mm, and the length of the spring is far beyond the diameter of the tray, obviously the spring cannot be directly measured by the elastic testing machine elastic

Method used

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  • Machining method of wave spring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: The spring expansion of the treatment is 249×1.9mm.

[0043] Clean the parts and tooling with acetone, and dry them. Put one wave spring blank into the molding tooling for vacuum aging treatment:

[0044] 1.1. Insert 2 load thermocouples into the holes of the tooling where the thermocouples are placed. When the temperature rises, record the heat treatment holding time when the indicated value of the last load thermocouple reaches the lower limit of the set temperature.

[0045]1.2. Close the furnace door and vacuumize the furnace to make the pressure in the furnace lower than 6.65×10-2Pa;

[0046] 1.3. Heating, heat preservation and cooling, raise the furnace temperature to 600°C at 10°C / min, keep warm until the part temperature reaches 600°C, and raise the furnace temperature to 800±10°C at 6°C / min, at 800±10 ℃ heat preservation for 1 hour + 10 minutes; cooling, first vacuum cool the parts to 650±10 ℃, then turn on the argon gas and fan to cool the parts be...

Embodiment 2

[0051] Example 2: The spring expansion of the treatment is 249×1.9mm.

[0052] Clean the parts and tooling with acetone, and dry them. Put 2 wave spring blanks into the molding tooling at the same time, and carry out vacuum aging treatment:

[0053] 2.1. Insert 3 load thermocouples into the holes of the tooling where the thermocouples are placed. When the temperature rises, record the heat treatment holding time when the indicated value of the last load thermocouple reaches the lower limit of the set temperature.

[0054] 2.2. Close the furnace door and vacuumize the furnace to make the pressure in the furnace lower than 6.65×10-2Pa;

[0055] 2.3. Heating, heat preservation and cooling, raise the furnace temperature to 600°C at 10°C / min, keep warm until the temperature of the parts reaches 600°C, and raise the furnace temperature to 800±10°C at 6°C / min, at 800±10°C ℃ heat preservation for 1 hour + 10 minutes; cooling, first vacuum cool the parts to 650±10 ℃, then turn on the ...

Embodiment 3

[0060] Example 3: The spring expansion of the treatment is 249×2.5mm.

[0061] Clean the parts and tooling with acetone, and dry them. Put one wave spring blank into the forming tooling at the same time, and carry out vacuum aging treatment:

[0062] 3.1. Insert two load thermocouples into the holes of the tooling where the thermocouples are placed. When the temperature rises, record the heat treatment holding time when the indicated value of the last load thermocouple reaches the lower limit of the set temperature.

[0063] 3.2. Lock the furnace door and vacuumize the furnace to make the pressure in the furnace lower than 6.65×10-2Pa;

[0064] Cleaning: Clean the parts and tooling with acetone and dry them.

[0065] 3.3. Heating, heat preservation and cooling, raise the furnace temperature to 600°C at 10°C / min, keep warm until the temperature of the parts reaches 600°C, and raise the furnace temperature to 800±10°C at 6°C / min, at 800±10 ℃ heat preservation for 1 hour + 10 m...

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Abstract

The invention provides a machining method of a wave spring. A strip the same as a finished wave spring in thickness, length and width is obtained, a remelting layer of the strip is polished out through crocus paper, and a planar wave spring blank is made; the wave spring blank is fixed in a tool at room temperature and is subjected to cooling sizing; vacuum sizing processing is conducted, wherein hot sizing processing is conducted in an aging sizing mode, a clamp is detached, then the part shape is reserved, and forming processing of the spring is completed; the part is preformed through the fixing function of technological equipment, then elastic deformation stress is eliminated through aging hot processing, and the accurate machining shape of the part is reserved. It is ensured that the geometrical size and waveform of the wave spring meet the design requirements; the machining problem of strip-shaped wave springs is solved; it is ensured that the spring meets the design requirements.

Description

【Technical field】 [0001] The invention belongs to the technical field of spring manufacturing, and relates to a processing method of a wave spring. 【Background technique】 [0002] The strip wave spring belongs to the special-shaped spring category. The spring is made of 3J68 high-temperature elastic alloy strip with a thickness of 3.5±0.05mm. The wave spring is expanded into a strip shape of 249×2.5(1.9)mm. Periodic sine wave waveform. The existing forming method is: take 3J68 high-temperature elastic alloy wire with the same width as the spring, use a stamping die to form it through cold stamping, and then stabilize the size through heat treatment. However, for the 3J68 material high temperature elastic alloy semi-cold hardened strip with a wall thickness of 3.5±0.05mm, the part rebounds after cold forming, and it is very difficult to maintain the shape after cold forming, and it is easy to cause cracks, which cannot meet the requirements of the drawing. The existing dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21F35/00
Inventor 王丽张华孙惠娴赵彩慧全洪伟李补效刘敏赵筱箐
Owner AECC AVIATION POWER CO LTD
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