模具设计选择题（Selection of die design）.docVIP

模具设计选择题（Selection of die design） Three 、 choose questions (fill in the blanks of the questions in the correct answer number) 1. during the process of blanking deformation, the plastic deformation stage formed ___A________. A, bright band, B, burr, C and fracture zone 2. When blanking, the calculation principle of the blade size is determined by ____A_______ first. A, die edge size B, punch die size C, convex and concave die size tolerances 3. When the blanking clearance is large, the material size is ____A____, the punch size, the material size _____A___ and the die size are changed by the elastic recovery of the material after blanking. A, greater than, less than B, greater than, greater than C, less than, less than D, less than, greater than 4. Porous blanking stamping, in order to reduce the blanking force, should use the ______A_____ method to achieve small equipment punching parts. A, ladder punch blanking, B, oblique edge blanking, C, heating blanking 5. In order to make the blanking process go on smoothly, the die or the scrap in the die punching direction is pushed out from the die hole, and the required force is called ______A_____. A, pushing force B, unloading force C, the top force 6. Punching a workpiece, blanking force of F, using rigid unloading, down way, the total pressure is _____B______. A, blanking force + unloading force, B, blanking force + pushing force, C, blanking force + unloading force + pushing force 7, if the pressure center of the mold does not pass through the center line of the slider, then the slider will bear the eccentric load, lead to the guide and die oriented parts ______B_____. A, normal wear, B, abnormal wear, C, initial wear 8, about the shape and position accuracy in shape have higher requirements, should adopt _____ C______. A, guide die B, progressive die C, compound die 9. The die for high speed press is ______B_____. A, guide die B, progressive die C, compound die 10, in the guide single process blanking die, the guide c