The processing method of embossing machine

Ordinary embossing machines mainly change the shape of the blank, and the wall thickness does not change much. The design calculation of the shape and size of the blank is the key technology. The process elements include the trajectory of the spinning wheel, the diameter of the spinning wheel, the spinning gap, the feed speed, the spindle speed, the spinning speed, the corner radius of the runner, the front-end rotating wheel and the mold bus.

Powerful rotation mainly changes the wall thickness and diameter of the workpiece. The length of the workpiece will change accordingly. The processing elements are the diameter of the rotating wheel, the fillet radius of the rotating wheel, the front angle of the rotating wheel, the back angle of the rotating wheel, and the angle of attack during rotation. Spindle speed, feed speed, embossing gap, spinning channel, thinning rate, workpiece half cone angle, spinning speed, etc.

Of course, for materials with higher elongation, the area is reduced, and the tensile strength and yield strength should also be appropriate.

The heat treatment of metal materials is also the main factor in the embossing process. During the spinning process, due to strong pressure and tensile stress, the material hardens and must be softened by heat treatment. In order to change the mechanical properties of the final workpiece, it is necessary to perform the necessary heat treatment.

The products of various types of automatic embossing machines have various shapes. By rotating spinning, various tasks such as forming, shrinking, sealing, back cover, flanging, hemming, and hemming can be completed. Applicable to all walks of life.

For the powerful spinning process of cylindrical parts, the material deformation process always follows the principle of constant volume. The change of the shape of the workpiece is the reduction of the wall thickness of the front and rear cylinders, the reduction of the diameter, the increase of the length and the reduction of the inner diameter of the product. Due to different process parameters, it can also be changed to varying degrees. The final product elements are the outside (inside) diameter, wall thickness, length, straightness, and roundness of the cylinder.

There is a special processing method in the cylindrical automatic powerful embossing machine, that is, the delamination offset, which means that multiple rotating wheels are offset from each other in the circumferential direction, and conversely, the thickness of the blank is reduced in the radial direction. Small direction. Stress process. This method can complete multiple passes in a single process, improve production efficiency, and increase the diameter accuracy of the workpiece due to the limitation of the material deformation zone.

The reasons for the deformation of the mold of the CNC embossing machine are often complicated, but as long as the deformation law is grasped, the cause of its occurrence and different methods are used to prevent the mold deformation of the CNC spinning machine, the deformation can be reduced and controlled. Generally, the following methods can be used to prevent thermal deformation of precision and complex CNC rotary molds.

1) Reasonable material selection. For fine and complex molds, good small deformations should be selected. For mold steels (such as air-quenched steel), mold steels with severe carbide segregation should be strictly controlled for quenching and tempering. For larger and unforgeable die steels, solid solution double refining heat treatment can be carried out.

2) The structure design of the numerical control mold of the embossing machine should be reasonable, the thickness should not be too large, and the shape should be symmetrical. For large-scale deformation numerical control embossing machine molds, the deformation law must be mastered, and the reserve is allowed. For large and precise molds, combined structures can be used.

3) The precision heat treatment of the precision mold eliminates the residual stress generated during the processing.

4) Choose the heating temperature reasonably and control the heating speed. For precision molds, slow heating, preheating, and other soaking methods can be used to reduce the heat treatment deformation of the mold.

5) On the premise of ensuring the hardness of the mold of the CNC embossing machine, pre-cooling, step cooling quenching or heating quenching technology should be used as much as possible.

6) For complex molds, as long as conditions permit, vacuum heating and quenching should be used, and then low-temperature treatment should be performed.

7) For some precision molds, heat treatment, aging heat treatment and heat treatment can be used to control the accuracy of CNC spinning molds.

8) For defects in repairing sand holes, pores, and wear parts, please use cold welders and other repair equipment affected by heat to avoid deformation during repair.

In the field of metal processing engineering, embossing machine technology is a new technology for forming without metal chips. Embossing machine processing utilizes metal ductility, combining the characteristics of forging, extrusion, stretching, bending, ring rolling, cross rolling and rolling, to achieve a high-quality and high-efficiency metal forming process without cutting. After the 1950s, the pressure of embossing machines developed rapidly. The molding technology has the advantages of good deformation conditions, good product performance, small dimensional tolerances, high material utilization, a wide product range, and the ability to process seamless hollow rotating body parts.

The successful application of embossing machine technology and CNC embossing machine has promoted the development of cutting-edge technologies such as aviation, rockets, missiles, and satellites. It has become a huge number in industries such as conventional weapons, chemical industry, metallurgy, machinery manufacturing, electronics, light industry, and civilian use. A wide range of metal processing technology equipment and products. As a new technology, embossing has developed in parallel with traditional methods, forming a new field of modern metal pressure processing.