Tension control mechanism and cradle parts of multi-strand coil spring CNC machine tool

Abstract

The invention discloses a cradle component of a multi-stranded spiral spring numerical control machining tool. The cradle component comprises a cradle, the front portion of the cradle is provided with a steel wire traction guide mechanism, the tail portion of the cradle is provided with a steel wire storage mechanism, the cradle is further provided with a steel wire tension control mechanism, and the front end of the cradle is provided with a steel wire outlet hole corresponding to the steel wire traction guide mechanism. The steel wire storage mechanism comprises two wire coil seats used for arranging steel wire coils, the wire coil seats are arranged on the cradle, the steel wire tension control mechanism comprises a magnetic powder clutch and a motor connected with the input end of the magnetic powder clutch in a transmission mode, a wire coil rotating shaft I and a wire coil rotating shaft II which are coaxial and can rotate synchronously with steel wire coils are arranged on the wire coil seats, the wire coil rotating shaft I is in transmission connection with the output end of the magnetic powder clutch, and the magnetic powder clutch and the motor are both fixedly connected with the cradle. The invention further discloses a tension control mechanism of the multi-stranded spiral spring numerical control machining tool, mutual even tension of each strand of steel wires is guaranteed, and the production quality of steel wire winding wires can be effectively improved.

Description

technical field [0001] The invention relates to a cable twisting device, in particular to a tension control mechanism and a cradle part of a multi-strand coil spring numerical control machining machine tool. Background technique [0002] The multi-strand coil spring is a coil spring formed by winding multiple strands of steel wire into a steel cable. Compared with single-strand springs, multi-strand coil springs have the advantages of high strength, long life, and good vibration absorption effect. They are key parts of products such as aero-engines and automatic weapons, and can replace traditional single-strand metal springs and rubber springs. At present, my country's manufacturing technology for multi-strand coil springs is still immature, which is mainly manifested in high scrap rate, production quality and precision are not good enough. [0003] The processing process of the multi-strand coil spring is relatively complicated. The distance between the steel cable and th...

AI Technical Summary

Problems solved by technology

At present, my country's manufacturing technology for multi-strand coil springs is still immature, mainly manifested in high scrap rate, production quality and precision are not good enough

[0003] The processing process of the multi-strand coil spring is relatively complicated. The distance between the steel cable and the steel wire before coiling the spring and the spring pitch during the spring coiling need to be accurately matched with the rotational speed. The springback after processing needs accurate tension control. The quality of the finished product of the multi-strand coil spring needs to strictly control the tension of each strand of steel wire to be uniform

For the collection of tension information, the Chinese patent No. CN200910104596.9 discloses a multi-strand coil spring CNC machine tool steel wire tension controller, because the tension collection point of the multi-strand coil spring CNC machine tool wire tension controller is far from the cable end It is far away, that is, the tension collection point is placed near the wire outlet, so the actual controlled tension is the tension near the wire outlet. The steel wire is bent during the winding process, and there is friction with the guide and traction mechanism, resulting in the multi-strand The tension of each strand of steel wire in the steel wire tension controller of the spiral spring CNC machine tool is not uniform at the cable winding, and the input end of the magnetic powder brake is fixedly installed. Once the wire jumps, the tension of the steel wire will quickly drop to zero; that is, the existing In technology, the tension control method in the production process is not perfect and cannot meet the actual application requirements, which seriously affects the production pass rate and the quality of multi-strand coil springs

In addition, during the production process, the tension controller will rotate around a horizontal shaft, that is, the gravity and centrifugal force of some parts in the tension controller will also affect the tension control, resulting in unstable wire tension control

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