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

Claim 8:
9. An electromagnetic stamping device, comprising:
a blank holder, having a plurality of blank holder areas divided based on a contour characteristic of a workpiece to be stamped;
a plurality of pressure sensors, having a one-to-one correspondence with the plurality of blank holder areas, wherein each pressure sensor is configured to collect blank holder force data G of a corresponding blank holder area every cycle period t0;
a controller, configured to control a blank holder force for each blank holder area based on an error between the blank holder force data G and a value F of a blank holder force function set over time for the blank holder area at a current time, where e=F−G, and to obtain the workpiece to be stamped by stamping sheet material under the blank holder force; and
a plurality of displacement sensors corresponding to the plurality of blank holder areas, each displacement sensor is configured to collect deformation data of the sheet material every cycle period t0;
wherein the controller is configured to send an alarm instruction and stop stamping in response to the deformation data being greater than 1.5 times an initial thickness of the sheet material.