Method and forming tool for hot forming and press hardening work pieces made of sheet steel, in particular galvanized sheet steel

A pressure quenching and forming mold technology, which is applied in the field of hot forming and pressure quenching of galvanized workpieces, and the field of forming molds for hot forming and pressure quenching of galvanized workpieces, and can solve problems such as component damage.

Inactive Publication Date: 2014-07-30
THYSSENKRUPP STEEL EURO AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The crack can extend into the slab so that premature component failure occurs

Method used

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  • Method and forming tool for hot forming and press hardening work pieces made of sheet steel, in particular galvanized sheet steel
  • Method and forming tool for hot forming and press hardening work pieces made of sheet steel, in particular galvanized sheet steel
  • Method and forming tool for hot forming and press hardening work pieces made of sheet steel, in particular galvanized sheet steel

Examples

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Embodiment Construction

[0025] exist figure 1 with 2 shows a section of a cooled forming tool for hot forming and press hardening a sheet-shaped or prefabricated workpiece 1 made of steel sheet, in particular a galvanized workpiece made of sheet steel. The positive mold is indicated by reference numeral 2 , and the female mold (casting mold) of each forming die is indicated by reference numeral 3 . also, figure 1 and / or figure 2 The forming tool shown in can optionally have a hold-down device (binder tool) which presses against the die 3 during the forming of the workpiece 1 . However, the forming tool according to the invention is preferably formed as a forming tool without a blanking tool (without a hold-down device).

[0026] The female mold (casting mold) 3 contains a cavity 4 into which the male mold 2 enters during the shaping and deep drawing of the workpiece 1 . figure 1 with 2 The individual forming tools, which contain the formed workpiece 1 , are shown in each closed state.

[00...

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Abstract

The invention relates to a method for hot forming and press hardening plate-shaped or preformed workpieces made of sheet steel, in particular galvanized workpieces (1) made of sheet steel, in which the workpiece (1) is heated to a temperature exceeding the austenitizing temperature and subsequently formed and quenched in a cooled forming tool comprising a stamp (2) and a die (3), characterized in that the drawing edge region, which is defined by a positive die radius, of the die (3) used for hot forming and press hardening is provided with a materially bonded coating of a material (6, 6') and / or is provided with an insert (5) having a thermal conductivity that is lower than the thermal conductivity of section (3.1) of the die (3), which is adjacent to the drawing edge region, by at least 10 W / (m*K), which section comes into contact with the workpiece (1) during hot forming and press hardening of the same. The surface of the material (6, 6') applied to the drawing edge region and facing the workpiece (1) or the surface of the provided insert (5) has a lateral dimension extending across the drawing edge (7), which is in the range of 1.6 times to 10 times the positive die radius of the die (3). The invention also relates to a corresponding forming tool.

Description

technical field [0001] The invention relates to a method for hot forming and press hardening of sheet-shaped or prefabricated workpieces consisting of steel sheets, in particular galvanized workpieces consisting of steel sheets, in which the workpieces are heated to a temperature above the austenitizing temperature and subsequently Forming and quenching in a cold forming mold having at least one male mold and at least one female mold. The invention also relates to a forming tool for the hot forming and press-hardening of sheet-like or prefabricated workpieces made of steel sheets, in particular galvanized workpieces made of steel sheets, the forming tool having at least one male die and a female die corresponding to the male die, Wherein the male mold and / or the female mold have cooling channels for the circulation of cooling fluid. Background technique [0002] With regard to the hot forming and press hardening of workpieces made of sheet steel, devices are known which hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/16B21D22/20C21D1/673
CPCB21D22/208C21D1/673C21D1/22B21D37/16B21D22/20B21D22/022
Inventor 扬科·巴尼克萨沙·西科拉马里亚·科耶尔托马斯·斯特鲁佩克
Owner THYSSENKRUPP STEEL EURO AG
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