Hot stamping production line of scale-free heating

Abstract

The invention discloses a hot stamping production line of scale-free heating. The production line comprises a pressing machine, a loading system and a discharge system disposed on both sides of the pressing machine, a blank positioning system fitted with the loading system, a first scale-free heating system and a second scale-free heating system symmetrically disposed on both sides of the loadingsystem and a stacking system, wherein the loading system is used to load materials for the scale-free heating systems and the pressing machine; the blank positioning system is used to position a heated blank; and the first scale-free heating system and the second scale-free heating system comprise a rotation table and two multi-hearth scale-free heating furnaces disposed on the rotation table respectively, furnace gates of the two multi-hearth scale-free heating furnaces face each other, and the rotation table can be rotated to make the furnace gates of the two multi-hearth scale-free heatingfurnaces on the rotation table alternatively face the loading system. The production line has the advantages that complete scale-free heating of the blank can be realized; and a furnace rotation technology is used, so production rhythms are satisfied, and stay duration of the high-temperature blank in atmosphere and a temperature drop of the blank can be greatly reduced.

Description

[0001] Cross Reference Related References [0002] This application claims the priority of the Chinese patent application with application number 2019100851942 and titled "A Hot Stamping Production Line Without Oxidation Heating" filed on January 29, 2019, and the above application is incorporated herein by reference. technical field [0003] The invention relates to the technical field of hot stamping, in particular to a hot stamping production line without oxidation heating. Background technique [0004] At present, high-strength steel materials in the automotive hot stamping industry mainly include 22MnB5 bare steel plate (steel plate without coating on the surface) and coated steel plate (steel plate with plated / coated surface). Although the coated plate can avoid oxide skin on its surface when heated, due to its high price and the coating is easily melted when heated to a certain temperature, resulting in the coating sticking to the furnace rolls, racks and molds , af...

AI Technical Summary

Problems solved by technology

However, this production line is set up for the warm forming process of magnesium-aluminum alloy plates. The heating temperature is 450-600°C and the holding time is 20-60 minutes, while the heating temperature of high-strength automotive steel is 900-930°C. The holding time cannot exceed 10 minutes, otherwise the parts will be scrapped, so the production line and its production process cannot be used for the production of high-strength steel parts for automobiles, let alone solve the problem of oxidation when the bare plate is heated; High-speed cyclic rotation will cause cables, pipelines, etc. to be entangled with each other, fatigue and easy to break

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