Hot press processing device and hot press processing method

Abstract

The objective of the present invention is to eliminate the generation of burrs in a press-formed product even with a configuration in which a high-temperature blank material is subjected to a trimmingprocess, thereby eliminating a burr removal operation performed after forming, and thus achieving a reduction in work man-hours and by extension a reduction in cost. In a press-forming process in which a blank material 3 is shaped while a die 1 is being clamped against a punch 2, a trim part 3a is sandwiched between a trim holding stepped portion 6 and a cut holder 8 while an elastic force of a spring component 9 is being imparted thereto. As a press-forming action of the die 1 progresses, a trimming blade 7 moves in a relative manner along an outer peripheral edge portion 5b of a punch sideforming surface portion 5, while the cut holder 8 is being subjected to a pressing force of the trim holding stepped portion 6, counteracting the elastic force of the spring component 9, and in this way the trim part 3a is cut off by being sheared between the trimming blade 7 and a tip end corner portion 5c of the outer peripheral edge portion 5b of the punch side forming surface portion 5.

Description

technical field [0001] The present invention relates to a hot press processing device that heats a steel material blank to its quenching temperature, shapes the heated blank using a low-temperature mold, and quenches the blank, and hot press processing using the hot press processing device method. Background technique [0002] In hot press working, a blank to be formed is heated from 750°C to a quenching temperature (austenite temperature) of 1000°C, and the blank is introduced into a mold in the heated state to be formed. Then, the heated blank is quenched by the low-temperature mold immediately before the mold clamping is completed, transforms into a martensitic structure, and is hardened and quenched. Therefore, hot press working can produce a high-strength press-formed product at low cost without an independent quenching process. Therefore, it is suitable for body parts produced by press forming, such as door anti-collision beams and center pillars of automobiles, and ...

AI Technical Summary

Problems solved by technology

Therefore, this also becomes the main factor that causes the cost of press-formed products to be high.

[0006] Therefore, in order to solve the problems of delayed failure due to such laser processing and high product cost due to the introduction of special equipment, various methods have been proposed in the past to perform these processing on the blank in a heated state, that is, in an unhardened state. Hot press forming processing technology (for example, Patent Document 1 and Patent Document 2)

Images