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Henan Friend Metal Products Co.,Ltd

The Development Of Spring Steel Wire Processing Technology



The development of Spring Steel Wire processing technology

At present, the machining equipment and processing production line of mechanical Spring Steel Wire are developing towards the depth and breadth of NC and CNC. But with the Spring Steel Wire material and a few new changes, the processing technology also has development.

1) the outer diameter of the Spring Steel Wire, the variation pitch and the diameter of the steel wire of the variable wire (three changes), the suspension Spring Steel Wire is not moulded. Since the development of three - changing Spring Steel Wire, tapered steel rod has been used in CNC lathes, but the yield and price are not ideal. Now, it is changed to heating, which can control the roll speed and drawing force, get the shape of the cone, and quench it with the waste heat.

2) hollow stable Spring Steel Wire rod is made of low carbon boron steel plate.

3) the torsion bar adopts the high purity 45 steel, and the high hardness and the larger residual compression stress are obtained by high frequency quenching, thus improving the fatigue life and the ability to resist relaxation.

4) widely used electronic products, the Spring Steel Wire is basically used for stamping and automatic bending. At present, it is mainly developing composite materials.

(1) cold forming process of Spring Steel Wire

1) the cold forming process is a one-time automation capability. The cold forming machine has now reached 12 feet. In the (0.3 ~ 14) mm range of steel wire, basically in the 8 claw forming function once formed. The current development direction of forming process equipment: the main development trend is to improve the forming speed of the equipment, namely the production efficiency. Improve the durability of the equipment by improving the precision of the equipment parts and strengthening the heat treatment effect; To increase the length sensor and laser rangefinder, the CNC forming machine is automatically closed to control the manufacturing process.

2) cold forming process capability. At present, large wire diameter spring coil spring coil spring coil spring, the maximum specification can reach 20mm, = 2000MPa, and the winding ratio is 5. The cold forming process of the minic-block Spring Steel Wire and eccentric Spring Steel Wire is still limited.

(2) hot forming process of Spring Steel Wire

1) the speed capacity of hot forming process. At present, China has only CNC2 shaft hot coiling machine in the shape of (9 ~ 25) mm, and the maximum speed is 17 pieces per minute. The gap is bigger than in developed countries.

2) control ability of large Spring Steel Wire hot forming process. Because of the only CNC2 hot coiling machine, the shape control is less than three directions and the accuracy is poor. And there is no automatic rod rotation control and adjustment mechanism, so hot coil Spring Steel Wire forming process level and capability is low. Therefore, the precision of Spring Steel Wire and the surface oxidation and decarbonization level are also lower.

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