2 results about "Soft mode" patented technology

The application provides a device for metal pipe forming. The device for metal pipe forming comprises a upsetting-extruding die and a soft die bulging die. The upsetting-extruding die comprises an upper upsetting-extruding insert assembly and a lower upsetting-extruding insert assembly, a first accommodating space for accommodating a metal pipe to be processed is formed between the upper upsetting-extruding insert assembly and the lower upsetting-extruding insert assembly, and a preforming structure is arranged on each of the upper upsetting-extruding insert assembly and the lower upsetting-extruding insert assembly. The soft die bulging die comprises an upper soft die insert assembly and a lower soft die insert assembly, a second accommodating space for accommodating the metal pipe to be processed is formed between the upper soft die insert assembly and the lower soft die insert assembly, and the upper soft die insert assembly is provided with a soft die structure. The problem that the wall thickness is seriously thinned and the uniformity is poor due to small round angle and large deformation in the bulging area of the metal pipe in the prior art is solved.

The present application belongs to the technical field of plate forming, and relates to a plate high-strain-rate-controllable-soft-mold coupling precision forming device and method. The device comprises an electromagnetic pulse generating unit, a driving plate, a plunger, a pressure ring, a medium bin, a magnetic field auxiliary device, a coil and a female die. The female die is arranged at the lower end of the medium bin, and the plate is placed between the medium bin and the female die. The cavity between the medium bin and the plate is filled with magnetorheological fluid. The plunger is placed at the upper end of the cavity of the medium bin, the driving plate is placed on the upper end surface of the plunger, and the electromagnetic pulse generating unit is located on the upper end of the driving plate. In the initial stage of forming, the magnetic field auxiliary device is arranged at the periphery of the bottom of the plunger. In the later stage of forming, the magnetic field auxiliary device is arranged at the center of the bottom of the plunger. The device can realize the precision forming of the plate under the coupling action of high strain rate and controllable soft mold, improve the plasticity of the material under high strain rate from the inside of the material, provide suitable soft mold stress state for different deformation regions of the plate from the outside, regulate the deformation, and realize the precision forming of the part.