Forming device

Abstract

A forming device that forms a metal member from a metal material of an aluminum alloy, the forming device includes: a forming die that is curved to be recessed in a cross-sectional view and that includes a corner portion forming surface for forming a corner portion of the metal member, in which the forming die includes a first main die and a second main die that face each other, and a double-action die that is movable relative to the first main die and the second main die, and the metal material is pressed by the double-action die such that a corner portion corresponding part corresponding to the corner portion in the metal material is pushed against the corner portion forming surface.

What is claimed is: 
     
         1 . A forming device that forms a metal member from a metal material of an aluminum alloy, the forming device comprising:
 a forming die that is curved to be recessed in a cross-sectional view and that includes a corner portion forming surface for forming a corner portion of the metal member,   wherein the forming die includes
 a first main die and a second main die that face each other, and 
 a double-action die that is movable relative to the first main die and the second main die, and 
   the metal material is pressed by the double-action die such that a corner portion corresponding part corresponding to the corner portion in the metal material is pushed against the corner portion forming surface.   
     
     
         2 . The forming device according to  claim 1 , further comprising:
 a drive mechanism configured to move at least one of the first main die and the second main die;   a holding unit configured to hold the metal material disposed between the first main die and the second main die;   a heating unit configured to heat the metal material by energizing the metal material;   a fluid supply unit configured to supply a fluid having a high pressure into the metal material held between the first main die and the second main die;   a cooling unit configured to cool the forming die; and   a control unit configured to control the drive mechanism, the holding unit, the heating unit, the fluid supply unit, the cooling unit.   
     
     
         3 . The forming device according to  claim 2 ,
 wherein the drive mechanism includes
 a slide configured to move the second main die such that the first main die and the second main die are joined together, 
 a pull-back cylinder configured to generate a force for pulling the slide upward, 
 a main cylinder configured to apply downward pressure to the slide, and 
 a drive source configured to apply a driving force to the main cylinder. 
   
     
     
         4 . The forming device according to  claim 2 ,
 wherein the holding unit includes a lower electrode and an upper electrode configured to hold the metal material by interposing vicinities of end portions of the metal material from an up-down direction in a longitudinal direction of the forming die.   
     
     
         5 . The forming device according to  claim 4 ,
 wherein the lower electrode and the upper electrode are configured to move independently of each other in the up-down direction.   
     
     
         6 . The forming device according to  claim 2 ,
 wherein the heating unit includes
 a lower electrode and an upper electrode in a longitudinal direction of the forming die, and 
 a power supply configured to cause a current to flow through the metal material via the lower electrode and the upper electrode. 
   
     
     
         7 . The forming device according to  claim 2 ,
 wherein the fluid supply unit includes
 a nozzle configured to supply the fluid from an opening portion of an end portion of the metal material to an inside of the metal material, 
 a drive mechanism configured to move the nozzle forward and backward with respect to the opening portion of the metal material, and 
 a supply source configured to supply the fluid having a high-pressure into the metal material via the nozzle. 
   
     
     
         8 . The forming device according to  claim 2 ,
 wherein the cooling unit includes
 flow paths formed inside the first main die and the second main die, and 
 a water circulation mechanism configured to supply a cooling water to the flow paths and cause the cooling water to circulate through the flow paths. 
   
     
     
         9 . The forming device according to  claim 1 ,
 wherein the double-action die pushes the corner portion corresponding part against the corner portion forming surface in a stage before the first main die and the second main die move to a mold clamping position.   
     
     
         10 . The forming device according to  claim 1 ,
 wherein the double-action die is movable in a second direction intersecting a first direction in which the first main die and the second main die face each other in a cross-sectional view, and   the double-action die presses a part different from the corner portion corresponding part in the metal material.   
     
     
         11 . The forming device according to  claim 1 ,
 wherein the double-action die includes the corner portion forming surface, and presses the corner portion forming surface against the corner portion corresponding part.   
     
     
         12 . The forming device according to  claim 1 ,
 wherein the metal material is brought into contact with the double-action die after the metal material is brought into contact with the first main die and the second main die.