How to reduce CNC punch press mold grinding processing defects

        How to reduce CNC punch press mold grinding processing defects

        Gantry type high speed punching machine

    (1) OREKU has adopted precise subdivision grinding technology, including various methods such as rough grinding, fine grinding, fine grinding and polishing, and has made a reasonable selection of the grinding volume. The company uses CNC grinding machines for the process, realizing automatic control of radial feed, thus avoiding artificially increased large feed. In addition, the grinding process is automatically controlled by computer and includes rough grinding, fine grinding, fine grinding and polishing. Depending on the size of the grinding surface, the company can also automatically set the grinding feed, feed time and cycle time to ensure that the entire grinding process has a small, uniform and detailed feed. Under the premise of no CNC grinding machine, if the radial feed and the speed of the grinding wheel are appropriately reduced and the axial feed is increased, the contact area between the grinding wheel and the workpiece can be reduced, the heat dissipation condition can be improved, and the rise of the surface temperature can be effectively controlled, so as to enhance the quality of the mold.

Gantry type high speed punching machine

   (2) When selecting and dressing grinding wheels, most manufacturers tend to use grinding wheels made of white corundum. This type of grinding wheel is characterized as hard and brittle and tends to produce new cutting edges. As a result, it has a lower cutting force and generates relatively low grinding heat. In the choice of grinding wheel grit size, medium grit wheels such as 46 to 60 mesh are ideal, while in the choice of hardness, medium-soft and soft grinding wheels (such as ZR1, ZR2 and R1, R2), i.e., coarse-grained, low-hardness wheels, are used. Such grinding wheels have good self-sharpening properties and can effectively reduce cutting heat. In the process of fine grinding, the selection of suitable grinding wheels is particularly critical. Considering the characteristics of high chromium, high vanadium, high molybdenum and high tungsten in the mold steel, it is more appropriate to choose the grinding wheel with GD single crystal corundum and large air holes. It is also necessary to regularly dress the grinding wheel to ensure its sharpness and to avoid burning knife annealing and cracks during grinding.

Gantry type high speed punching machine