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　　According to rough drawings using precision casting parts, then the mold design and manufacturing, analysis of structural features developed parts of the craft reasonable regulations, according to technical rules to select the appropriate tools to design a suitable fixture.
　　First, according to the size of the drawings, the use of three-dimensional modeling software to draw the parts of the three-dimensional solid model. Then the map given by part tolerance and roughness to determine the various parts of the processing methods and processing accuracy, and the content determined according to the route and all parts of the allowance. In part three-dimensional model, based on the combined allowance parameters, produced a rough part model.
　　Secondly, the part originally identified by the processing line and margin parameters for each process of cutting and processing time were calculated, according to the part material, blank size and processing method, select the need to use the machine and tool, and determine the positioning clamp program, production of parts machining process planning integrated card. In the design process used in the process a number of special fixtures, select one of the two for a specific design.

According to your drawings by casting parts blank, then die design and manufacture parts structure characteristics, analyzes the reasonable technical process, worked out according to procedure choose corresponding machine tool, design the suitable fixture.
First of all, according to the size of the drawings, using 3 d modeling software to draw the components of the three-dimensional entity model. Then through the parts are on the drawing dimensional tolerance and roughness determined the parts processing method and machining precision, and according to the above contents determined the process route and different parts of the machining allowance. In part on the basis of 3 d model, combined with the machining allowance, making the parts of the parameters of the blank of model.
Second, through the original certain parts processing process route and surplus parameters on every procedure of processing time cutting dosages, calculate, according to parts material, blank dimensions and processing method, choose the need to use of machine tools and the cutting tool, and determine the orientation of clamping, made parts machining process planning comprehensive card. In the process of design process they used in some special jig, chose one of the two sets of the concrete design.