Process and Installation for Producing a Component from Sheet Magnesium

Abstract

The invention relates to a method and an installation for producing a component from sheet magnesium, comprising a forming tool, which comprises a punch and a die, for forming a semi-finished product made of sheet magnesium, in particular a semi-finished product in the form of a sheet magnesium blank, and a device for heating the semi-finished product to an elevated temperature, preferably to a temperature of at least 200° C., prior to the forming. In order to reduce the component costs, the invention proposes that the forming tool is designed without an internal heat source, is provided with a semi-finished product holder on which the heated semi-finished product can be placed in the forming tool without direct contact with the punch and the die, and comprises a drive which brings about a closing speed of the punch and the die in the range of 15 mm/s to 500 mm/s.

1 . A method for producing a component from sheet magnesium by forming a semi-finished product made of sheet magnesium in which the semi-finished product is heated to an elevated temperature, prior to the forming and is formed in a forming tool comprising a punch and a die, wherein the forming tool used for forming the heated semi-finished product is designed without an internal heat source, the heated semi-finished product is placed on a semi-finished product holder associated with the forming tool without directly contacting the punch and the die, the semi-finished product holder is designed as an active sheet holder and is positioned above the punch associated with the die, and the heated semi-finished product placed on the semi-finished product holder is then formed at a forming speed in the range of 15 mm/s to 500 mm/s. 
     
     
         2 . (canceled) 
     
     
         3 . The method according to  claim 1 , wherein the semi-finished product holder comprises a surface region that touches the heated semi-finished product and has a surface structure which is porous or comprises indentations. 
     
     
         4 . The method according to  claim 1 , wherein the semi-finished product holder comprises a surface region that touches the heated semi-finished product and is made of a material, or is provided with a coating, which has a thermal conductivity of at most 20 W/mK at 30° C. to 100° C. ambient temperature. 
     
     
         5 . The method according to  claim 1 , wherein the die has, in its forming face which faces the heated semi-finished product to be formed, indentations which bring about a reduction of the contact face which faces the heated semi-finished product. 
     
     
         6 . The method according to  claim 1 , wherein a forming tool is used in which the punch, the die, or both comprise an active cooling apparatus. 
     
     
         7 . The method according to  claim 1 , wherein the semi-finished product is transported directly into the forming tool by means of a transfer device which is provided with a conductive heat source. 
     
     
         8 . The method according to  claim 1 , wherein, during the forming, the semi-finished product is simultaneously trimmed by means of at least one cutting member integrated in the forming tool. 
     
     
         9 . An installation for producing a component from sheet magnesium, comprising a forming tool, which comprises a punch and a die, for forming a semi-finished product made of sheet magnesium the forming tool being designed without an internal heat source, and a device for heating the semi-finished product to an elevated temperature prior to the forming, wherein the forming tool further comprising a semi-finished product holder, designed as an active sheet holder which can be positioned above the punch and on which the heated semi-finished product can be placed in the forming tool without direct contact with the punch and the die, and a drive which brings about a closing speed of the punch and the die in the range of 15 mm/s to 500 mm/s. 
     
     
         10 . The installation according to  claim 9 , wherein a surface region of the semi-finished product holder, which surface region touches the heated semi-finished product, has a surface structure which is porous or comprises indentations. 
     
     
         11 . The installation according to  claim 9 , wherein a surface region of the semi-finished product holder, which surface region touches the heated semi-finished product, is made of a material, or is provided with a coating, which has a thermal conductivity of at most 20 W/mK at 30° C. to 100° C. ambient temperature. 
     
     
         12 . The installation according to  claim 9 , wherein the punch, the die, or both of the forming tool, at least in sub-regions, are made of a material, or provided with a coating, which has a thermal conductivity of at most 20 W/mK at 30° C. to 100° C. ambient temperature. 
     
     
         13 . The installation according to  claim 9 , wherein the punch, the die, or both of the forming tool comprise an active cooling apparatus. 
     
     
         14 . The installation according to  claim 9 , wherein a transfer device provided with a conductive heat source is associated with the forming tool, by means of which transfer device the semi-finished product to be formed can be placed directly on the semi-finished product holder. 
     
     
         15 . The installation according to  claim 9 , wherein indentations which bring about a reduction of a contact face which faces the heated semi-finished product are formed in the die. 
     
     
         16 . The installation according to  claim 9 , wherein the forming tool is provided with at least one cutting member. 
     
     
         17 . The method according to  claim 1 , wherein the semi-finished product is a sheet of magnesium blank. 
     
     
         18 . The method according to  claim 1 , wherein the semi-finished product is heated to a temperature of at least 200° C. 
     
     
         19 . The installation according to  claim 9 , wherein the semi-finished product is a sheet magnesium blank. 
     
     
         20 . The installation according to  claim 9 , wherein the device heats the semi-finished product to a temperature of at least 200° C.