In order to ensure that the blank manufacturer should sign a technical agreement. For precision molds and parts, quality. When selecting blank data, attention should be paid to zero so that the deformation and direction of the relevant parts should be as consistent as possible. The material direction of the piece on the blank. Choose the processing method can know that there are many kinds of mold processing methods, in the past. And each processing method has its reasonable range of use. To be processed parts of the appearance of the shape, size range, hardness of data, can achieve economic fine craft personnel to choose the best processing method of various factors. Degree, surface roughness, processing efficiency and cost requirements. Arrange processing sequence for processing quality, production efficiency, economic effects have a great deal of reasonable arrangement of parts of the surface processing sequence. To deal with the concentration and dispersion of the process, the impact.

Steel profiles (plate, bar) forgings, castings and welding parts. Precise mould and parts according to the shape and size of parts, materials should be selected as far as possible. When the blank size needs to use the type and technical requirements and other factors. In order to facilitate the blank processing. Forgings should be used. Large-scale parts are commonly used when casting, forging profiles are modified or to improve the physical and mechanical properties of data. Its size should be based on the processing allowance, blank surface quality and accuracy, the shape of the blank should be similar to the shape of the parts. And should ensure the processing quality of the parts before the amount of clamping, a blank to be processed out of the number of parts to calculate. Choose the smallest blank size possible. The external and internal quality of the blank and the state of supply (such as annealing, tempering, etc.) shall be clearly specified when preparing the process. Defects such as exterior decarburization layer, oxide scale, clamps, cracks and pits must comply with the standard. Annealing hardness of forgings shall not be greater than! For large castings, forgings and welds, rough parts should be annealed to eliminate internal stress.

When the precision mold and parts arrange the processing sequence, the division of the processing stage and the sequence of working procedure and so on. The process of dispersion and concentration and parts are often more complex polyhedron formed by the surface, because the mold is a variety of single production. Therefore, there are many processing methods using the centralized process, and the profile requires to ensure the mutual position relationship. That is, in the conditions of machine tools allowed should try to use some special tools and fixtures. Make the workpiece in a clip or a process to complete the most processing for large parts should be more so, the task. This is conducive to simplifying the process and production management. The division of the processing stage, such as fixed plate, template, guide pillar, guide sleeve and other processing, structural parts of the mold. According to the general mechanical parts such as die, punch, rough, half fine, finishing and finishing four stages to divide. And most of the working parts. It can be divided into rough machining, base processing, marking, working face and surface rough machining, semi-finish machining and fine core. Work, repair and finishing and other processes. Generally are hexahedral or cylindrical processing, rough processing is to remove the rough appearance of the blank. For large castings and forgings, it is necessary to remove the fur and find out whether there are defects on the surface of the blank in time.

As the processing benchmark for the next process. Base surface is generally required to fine base surface processing is the processing technology datum. Roughness! The value is not greater than the two base plane parallel to the hexagonal parts, milling, finishing or finishing. And keep them perpendicular to each other. Base surface is often used as a benchmark, marking is a common process before parts processing and forming. Underline all dimension lines and center positions that need to be referenced during machining. Working face and surface processing is based on the base surface and reference to the line will be processed parts forming. Its processing methods also need to prepare and have rough machining, semi - finishing and finishing points. To ensure that the parts of the surface to meet the requirements of the drawing. Polished appearance should leave room for processing. A method to reduce the machining requirements of machine tools. When parts preparation and repair processing is to facilitate mold manufacturing. Or it is necessary to determine the final size through mold test, and the relative position, fit size and clearance are required. Usually it is based on a part or a size, not according to the drawings will be directly processed to the size of the parts. Other parts to match or in the parts to leave the correction amount to be assembled or mold test after the appropriate correction. This method is made with ordinary precision machine tools. But in the use of precision machine tool processing parts, processing parts are widely used. Precision molds and parts are usually made in accordance with the basic dimensions of the drawing without tolerance.