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Precision forging forming process of torque elastomer for 330 MPa-grade motor torque sensor

A technology of motor torque and forming process, applied in the field of sensors, can solve the problems of difficulty in guaranteeing the consistency of batch processing parts, and difficulty in realizing industrialized mass production.

Inactive Publication Date: 2021-02-12
盐城市明佳机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the subtle differences in the material structure and processing of the elastomer itself, especially the heat treatment process, are difficult to guarantee the consistency of batch processed parts. Therefore, the elastic body of the sensor is prone to self-deformation and reset errors when it is driven by the main circuit. Make it difficult to achieve industrial mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The precision forging forming process of the torque elastic body for the 330MPa motor torque sensor includes the following steps:

[0023] Step 1, blanking: select Laiwu Steel's brand of 20CRMNTI as the raw material, and use a circular saw for blanking.

[0024] Step 2, spheroidizing annealing: the blanked steel material is sequentially subjected to the first annealing, the second annealing, the third annealing and the fourth annealing to obtain the annealed steel material.

[0025] The specific processes of the first annealing, the second annealing, the third annealing and the fourth annealing are as follows:

[0026] The first annealing is to heat the steel material to 1150°C at a speed of 60°C / min, keep it for 4 hours, then blow it with air to cool it to 730°C, keep the temperature for 35 minutes, heat it to 800°C, keep it for 2 hours, and then heat it at 40°C / min The cooling rate is oil cooling to 650°C, heat preservation for 30min, and then water cooling to room t...

Embodiment 2

[0034] The precision forging forming process of the torque elastic body for the 330MPa motor torque sensor includes the following steps:

[0035] Step 1, blanking: select Laiwu Steel's brand of 20CRMNTI as the raw material, and use a circular saw for blanking.

[0036] Step 2, spheroidizing annealing: the blanked steel material is sequentially subjected to the first annealing, the second annealing, the third annealing and the fourth annealing to obtain the annealed steel material.

[0037] The specific processes of the first annealing, the second annealing, the third annealing and the fourth annealing are as follows:

[0038] The first annealing is to heat the steel material to 1100°C at a speed of 70°C / min, hold it for 5 hours, then blow it with air to cool it to 750°C, keep the temperature for 35 minutes, heat it to 850°C, hold it for 1 hour, and then heat it at 45°C / min The cooling rate is oil cooling to 640°C, heat preservation for 35min, and then water cooling to room te...

Embodiment 3

[0046] The precision forging forming process of the torque elastic body for the 330MPa motor torque sensor includes the following steps:

[0047] Step 1, blanking: select Laiwu Steel's brand of 20CRMNTI as the raw material, and use a circular saw for blanking.

[0048] Step 2, spheroidizing annealing: the blanked steel material is sequentially subjected to the first annealing, the second annealing, the third annealing and the fourth annealing to obtain the annealed steel material.

[0049] The specific processes of the first annealing, the second annealing, the third annealing and the fourth annealing are as follows:

[0050] The first annealing is to heat the steel material to 1100°C at a speed of 70°C / min, keep it for 5 hours, then blow it with air to cool it to 700°C, keep the temperature for 40 minutes, heat it to 850°C, keep it for 2 hours, and then heat it at 50°C / min The cooling rate is oil cooling to 630°C, heat preservation for 35min, and then water cooling to room t...

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Abstract

The invention discloses a precision forging forming process of a torque elastomer for a 330 MPa-grade motor torque sensor. A steel material is subjected to four times of spheroidizing annealing, watercooling and oil cooling are combined, refining and uniform distribution of steel material grains are facilitated, meanwhile, the heating and cooling speed in heat treatment is controlled, the problems of fine surface layer grains and a thick middle structure of a finished product of a torque elastomer precision forging are solved, the surface layer grains are refined, lattice distortion and dislocation density are reduced, the high-temperature friction, wear resistance, hardness and surface strength of the finished product of the precision forging are greatly improved, the wear rate is greatly reduced, and the service life of the torque elastomer is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a precise forging forming process of a moment elastic body for a 330MPa class motor moment sensor. Background technique [0002] Electric power-assisted bicycles are based on traditional bicycles, equipped with a power system with a torque sensor as the core, and equipped with a motor and a battery. When the user pedals, the motor will be activated, and the power will be cut off when the user stops. The power of the motor used in the electric power-assisted bicycle changes with the size of the pedaling force, and can provide corresponding power support according to the pedaling force of the rider, thereby reducing the riding burden of the user and making the riding comfort and riding The mileage is greatly increased. Therefore, the real-time and accurate detection technology of pedaling force of electric power-assisted bicycles is very urgent and important in the fie...

Claims

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Application Information

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IPC IPC(8): C21D1/32C21D1/773
CPCC21D1/32C21D1/773
Inventor 李彬彬吴燕
Owner 盐城市明佳机械有限公司
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