Mold processing technology generally has three methods: casting, cutting and special processing.

1. Casting processing and casting processing methods, mainly including zinc alloy casting (applicable to cold stamping dies, plastic molds, rubber molds), low melting point alloys (applicable to cold stamping dies, plastic molds), Shore casting methods, beryllium copper alloys Zinc alloy molds, low melting point alloys and synthetic resin casting molds cast by methods such as casting (plastic molds) and synthetic resin casting (suitable for cold stamping dies), and are used for the preparation of upper and lower templates for cold stamping dies, large drawing dies and frames Blank preparation of parts.

Related die steel technical data: flame hardened steel, non-magnetic die steel, red punch die steel, air-cooled steel, base steel, Japan Datong die steel, Sweden ASSAB die steel, DC53, VIKING, S136, SLEIPNER, CALDIE , RIGOR, etc.

2. Cutting processing and cutting processing methods, mainly including ordinary machine tool processing (applicable to all kinds of mold processing), precision cutting machine tool processing, copy milling machine processing, copy planer processing, forming grinding machine processing, engraving machine tools, and profiling machine tools And CNC machine tools and other processing methods. According to the machining accuracy achieved by the mold parts, the cutting process is divided into rough machining process, finishing process and refurbishment process.

①. Rough machining process The so-called rough machining process refers to the process of cutting most of the machining allowance from the workpiece during processing to make its shape and size close to the requirements of the finished product. Such as rough turning, rough boring, rough milling, rough planing and drilling, etc., the machining accuracy is lower than IT11, and the surface roughness Ra 6.3μm The rough machining process is mainly used for the final machining with low requirements or non-surface matching and as a finishing process. Pre-machining before machining.

②. Finishing process The finishing process is to cut off less machining allowance from the rough machined surface, so that the workpiece can achieve higher machining accuracy and surface quality. Commonly used processing methods mainly include fine turning, fine boring, reaming, grinding, electrical machining and forming grinding.

③. Refurbishment processing Refurbishment processing is to remove a small amount of machining allowance from the surface of the finished workpiece to obtain parts with higher precision and surface quality. This process is generally called the final process of parts processing, and its precision And the surface quality requirements should meet the requirements of the mold design drawings, such as the grinding of guide posts and guide sleeves, and the polishing of working and formed parts.

At present, various types of molds have been developed and equipped with various forms and specifications of high-efficiency precision machining equipment from roughing and finishing to assembly technology and debugging, basically realizing mechanized and automated production.

Principle of form grinding:

It is to divide the outline of the part into several straight lines and arcs, and then grind them segment by segment in a certain order, and make the connection smooth and round to meet the requirements of the drawing.

Shaping grinding methods: forming grinding wheel grinding method, fixture grinding method

Grinding sequence: first select and grind two datum planes, and the grinding accuracy should be guaranteed, and then give priority to grinding all surfaces related to the datum plane, surfaces with high precision requirements, large planes and planes parallel to the coordinate axis When the straight surface is connected with the convex arc surface, the straight surface should be ground first; when the straight surface is connected with the concave arc surface, the concave arc surface should be ground first; when the two convex arc surfaces meet, the concave arc surface should be ground first; Grinding the large-radius arc surface first; when two concave arc surfaces meet, the small-radius concave arc surface should be ground first; the simple-shaped profile should be ground before the complex-shaped profile.