Patent ID: 11890661
Assignee: HEFEI UNIVERSITY OF TECHNOLOGY
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 16:
17. The device of claim 9, wherein each blank holder area corresponds to a pressure sensor and a blank holder block; the device further comprises a plurality of force-enhancing plates, a plurality of displacement sensors and a plurality of electronically-controlled permanent magnetic chucks corresponding to a plurality of blank holder blocks; a blank holder unit is formed by a blank holder block and an electronically-controlled permanent magnetic chuck, a force-enhancing plate, a pressure sensor and a displacement sensor corresponding to the blank holder block; and the blank holder unit is configured to perform stamping on each blank holder area by dynamically controlling the blank holder force;
the blank holder block is connected to an upper bottom surface of the pressure sensor; a lower bottom surface of the pressure sensor is connected to an upper bottom surface of a connecting rod of the blank holder block; a lower bottom surface of the connecting rod of the blank holder block is connected to a radial inner side of a connecting block and is arranged in order from inside to outside; a radial outer side of the connecting block is connected to a lower bottom surface of a connecting rod of the force-enhancing plate; an upper bottom surface of the connecting rod of the force-enhancing plate is connected to the force-enhancing plate; the force-enhancing plate is distributed directly under the electronically-controlled permanent magnetic chuck; an outer side of the connecting block is equipped with the displacement sensor, and the displacement sensor is perpendicular to a plane where the force-enhancing plate is located; a lower bottom surface of the connecting block is connected to a guide rod side of a guide rod cylinder, and a cylinder side of the guide rod cylinder is connected to a connecting plate; a convex with a multi-feature curved profile is provided at a center of the connecting plate; a number of guide rod cylinders is determined by a weight and a size of the connecting block to meet load-bearing requirements and the guide rod cylinders are mounted at a relative center of the connecting block; and the guide rod cylinders are configured to enable all blank holder blocks to return to a same level in a case that the device stops operating.