《冷冲压工艺与模具设计》试卷二（Cold stamping process and die design test paper two）.docVIP

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《冷冲压工艺与模具设计》试卷二（Cold stamping process and die design test paper two）.doc

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《冷冲压工艺与模具设计》试卷二（Cold stamping process and die design test paper two） Cold stamping process and die design test paper two Name, class, student number, grade No fillet R0.4 Production lot: large quantity Material: 08F Material thickness: 1mm design requirement 1. process analysis of stamping parts According to the drawing of the workpiece, analyze the shape, size, accuracy requirements and material performance of the stamping parts, whether it conforms to the stamping process Requirements. (15 points) 2. determine the optimum stamping process Through the stamping process analysis and the necessary process calculation, in the analysis of stamping properties, stamping times, stamping sequence and process On the basis of the combination method, various possible stamping process plans are put forward, and the optimum results are determined by comprehensive analysis and comparison Process plan. (10 points) 3. make sure the mold type According to the stamping parts production batch, stamping parts shape, size and accuracy and other factors, determine the type of mold. (5 points) 4. process size calculation (30 points) 1) the number of drawing and the size of drawing process 2) calculation of the cutting edge size of piercing, blanking and die 3) calculation of dimension of bending convex and concave die 4) layout design and layout 5) calculation of thrust pressure and selection of pressure equipment 5. die drawing (30 points) Draw the mold diagram, explain the main structure of the mold, including the positioning of the mold, parts, unloading and output device. Reference answer I. process analysis of the workpiece A) The material of the workpiece is 08, the plasticity and toughness are better, the shear strength t is 260 ~ 360Mpa, and the tensile strength is strong The degree of sb is 330 ~ 450Mpa, which is beneficial to the processing of various processes. B) The size of the workpiece has no tolerance requirement, so the accuracy is not high. It belongs to general parts an