When the machining accuracy is not high, some surfaces on the workpiece or fixture can be directly used as the tool face; when the machining accuracy is high, the tool setting point should be selected on the design basis or process basis of the part as far as possible, for example, for the part with hole positioning, it is more appropriate to take the axis of the hole as the tool setting point. The tool setting point must have a certain coordinate relationship with the positioning datum of the workpiece. In this way, the relationship between the machine tool coordinate system and the workpiece coordinate system can be determined. The selection of tool setting point should be convenient for coordinate value calculation and tool setting. During tool setting, the tool setting point should coincide with the tool position. The so-called cutter site refers to the intersection of the tool axis and the bottom surface of the tool for the flat end end milling cutter; for ball end milling cutter, it refers to the ball center of the ball head part; for turning tool, it refers to the tool tip; for the drill bit, it refers to the drill point; for the linear electrode cutting machine, it refers to the focus of the axis of the wire electrode and the part surface.
Stress and warpage analysis based on two-sided flow technique
According to the analysis results of gate solidification effect and packing pressure and temperature distribution, the stress and warpage analysis module calculates the stress changes with time in the wall thickness and plane direction of the product, and the shrinkage of the product along the wall thickness direction at the time of demoulding. Based on the double-sided flow technique, a special double-layer shell element is used to predict the warpage of the product at the time of demoulding.
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