Working principle of numerical control spring coiler

[guide] there are many kinds of springs, such as compression spring, tension spring, torsion spring, etc. Here we only introduce the working principle of the most widely used spring coiler. Use one or more pairs of rollers to press the steel wire and rotate, push

There are many kinds of springs, such as compression spring, tension spring, torsion spring, etc. Here we only introduce the working principle of the most widely used spring coiler.

A pair or several pairs of rollers are used to press the steel wire and rotate it to push the steel wire to move to the right, and the steel wire is shaped by the limiting and guiding functions of the upper and lower ring diameter rods. The upper and lower ring diameter rods can move in their respective chutes. By controlling the position of the upper and lower ring diameter rods, the size of the spring ring diameter can be controlled. Pitch bar is a vertical movement of paper surface, and its function is to form the thread angle of the wound steel wire. By controlling the position of the pitch bar, the spring pitch can be controlled. When the winding is completed, cut the steel wire with a cutter. The core sleeve is used as a support when the cutter cuts the steel wire. The forming mechanism is shown in Figure 1.

Through the combined movement of wire feeding roller, upper and lower circle diameter bar, pitch bar and cutter, the circular spring with variable circle diameter and pitch can be wound. For the mechanical spring coiler, because there is only one power, all the action bars are completely linked by gears, cams, clutches and other mechanisms, which is complex in structure and time-consuming in adjustment. When changing a variety, it is often necessary to trim the cam shape, which requires high technical level of the operator, especially the adjustment range of the wire feeding length depends on the size of a sector gear, which limits the spring extension. When the sector gear is running back, the clutch is also needed to disconnect the wire feeding roller, which not only increases the noise, but also reduces the wire feeding accuracy.

In order to adapt to the computer control, we have carried on the thorough transformation to the mechanical structure of the spring coiler. First of all, each movement mechanism is independent and controlled by a servo motor. For example, the wire feeding mechanism is only a simple gear drive, and the wire feeding length can be infinite; the upper and lower circle diameter rods and pitch rods are directly driven by the motor connected with the ball screw; the cutting mechanism is only a simple one In addition to the general cutting mode, the cam drive of the can also match the upper and lower cutters for torsional cutting, so as to solve the spring cutting with large wire diameter and small winding ratio.

When the operator needs to process different kinds of springs, for the numerical control spring coiler, it only needs to fill in the corresponding parameters on the computer, and through the program control to coordinate the action of each mechanism, the spring needed can be wound.