Shuifu Hanyang Machinery Technology Co., Ltd
A bidirectional scroll torsion spring needs to be designed for the car shift clutch in a limited space. The bidirectional scroll torsion spring should be
installed on the transmission worm of the micro motor to generate a large torque while also transmitting kinetic energy and providing buffering
protection; However, the existing spring production equipment and processes can only produce ordinary spiral springs and cannot meet the production
of bi-directional spiral torsion springs. Therefore, it is necessary to propose a production process for double spiral springs.
summary of the invention
The purpose of this practical invention is to propose a bidirectional spiral torsion spring to solve the above problems.
In order to achieve the above objectives, the present invention provides the following technical solution: characterized by comprising the following
steps:
Step 1: Material cutting, using a punch press to divide the raw material into strip shaped spring strips according to the specified size;
Step 2: Forming: Using a bending machine, the spring steel from Step 1 is rolled in the same direction from the middle to both ends of the strip profile to
form two reverse spiral springs. The number of spiral coils of the two spiral springs is equal, and there is an elastic gap between each coil. Finally, the
outermost end of the spiral spring is bent;
Step 3: Quenching, subjecting the molded part obtained in Step 2 to atmosphere protection quenching treatment;
Step 4: Tempering, perform medium low temperature tempering treatment on the molded parts in Step 3, and cool them after tempering;
Step 5: Shot blasting, perform shot blasting process on the molded parts in Step 4.
Step 6: Surface treatment, apply oil coating process to the molded parts in Step 5.
As a preferred option, the spring steel is made into a strip profile with a length of 325 ± 0.8mm and a thickness of 2 ± 0.2mm using a punch press. The
strip profile is wide in the middle and narrow on both sides.
As a preferred option, the quenching temperature is 855 ± 25 ℃.
As a preferred option, the tempering temperature is 425 ± 25 ℃, the tempering time is 50 ± 10 minutes, and the cooling method is water cooling or
natural cooling in air.
As a preferred option, the shot blasting process uses steel shot with a diameter of 0.6mm and a hardness of 610 to 670HV, with a duration of 8 to 10
minutes.
The beneficial effects of the present invention are as follows: two relatively symmetrical bending machines are used to wind the strip profile in the
same direction from the middle to both ends at once, forming two reverse spiral springs. The number of spiral coils of the two spiral springs is equal,
and there is an elastic gap between each spiral coil. Through one winding, the production efficiency of the product is improved;
By first cutting and forming the spring material, then quenching and tempering it, and finally performing shot blasting during the production process of
the double scroll spring, the strength and weather resistance of the double scroll spring are greatly improved.
