The servo processing machine uses AC servo motor to drive the slider through the lead screw, and the position reading device provides data to the position control device, which can control the position of the bottom dead center during forming. Therefore, the thermal expansion and elastic deformation of the machine will not affect the accuracy of the product, which shows that the most suitable slider motion mode can be adjusted in a very small unit to control the position of the bottom dead center. Therefore, it is suitable for high-precision, high-function spiral servo punching machine without cutting and molding. The torque control is carried out in the form of hydraulic motor and accumulator, and the position control of bottom dead center can reach micron level. It is a machine with energy-saving and environmental protection requirements.

Crankshaft servo punch

The combination of crankshaft punch and AC servo motor is shown in Figure 3. 12. This kind of punching machine uses servo motor instead of clutch brake and flywheel on the original punching machine. This kind of punch not only has the characteristics of servo punch whose slider motion mode can be set at will, but also has the torque characteristics of ordinary mechanical punch. However, its working energy will not decrease at low speed.

Double action forming punch

Composite forming is a powerful means of non-cutting forming. Closed forging in cold forging is an example. The plastic flow of materials is controlled by controlling the movement and time diagram of multiple punches and dies. It can improve the accuracy and formability of products and even shorten the number of processes. Compound forming can be roughly divided into two categories: paying attention to the universality of punch and compound forming with compound die set; It is convenient to assemble and disassemble various production molds and to use double-acting punches for molding. In recent years, not only in the forging process, but also in the diversification and improvement of the composite forming ability of sheet metal forming and forging, it is required that the punch not only has multi-action performance, but also has high versatility.

Closed forging punch

Closed forging die and universal forging die have been widely used in the forming of star wheel and cross coupling. Its mold structure has blocking function and coordination function. Other closed forging punches that can save piping time during die assembly can be divided into two types: these functions are all on the punch, the upper and lower cylinders are on the punch, and the coordination mechanism is on the die base.

Flat forging punch

With the popularization of sheet metal forging, it is required that the forging punch can be used for drawing or shortening the number of projects, so the slider and workbench must be equipped with oil cylinders. The original closed forging almost always adopts large-capacity pneumatic action, while sheet metal forging needs not only pneumatic action suitable for working mode, but also sequential action, self-locking and other functions.

It is a toothed product. This is formed by a mold. The die core enters the female die before the male die, and the reverse ejector rod provides back pressure for the forward extrusion.

Gear forming punch

Double-acting hydraulic press for spiral gear forming. This press has sliding drives, two on the slider and two on the workbench, and all five drive sources share 1 hydraulic drive device.

In the initial stage of forming, the male die is inserted into the tooth gap of the female die in the block, and the material flows from below for preliminary forming. In this state, the die core rises, and the diameter of the die core in the center of the material changes from coarse to fine. At this time, a new space appears in the inner diameter of the workpiece, which can produce new plastic flow, so the material can fill the tooth tip with the increase of pressure. Figure 3. 17 is the product processed by this method. The machining pressure is only 1300Mpa, and the collapse angle and burr of the tooth profile are very small. The gear formed by controlling the material flow through double-action forming can reach JIS3-4 level, which is very close to high value-added non-cutting forming.

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