Spinning forming device

Abstract

An object of the present invention is to reduce heat transferred from a plate through a receiving jig to a rotating shaft in a spinning forming device. A spinning forming device includes: a receiving jig supporting a central portion of a plate to be formed; a rotating shaft to which the receiving jig is attached; a heater configured to heat a transform target portion of the plate by induction heating; and a processing tool configured to press the transform target portion to transform the plate. The receiving jig is configured to suppress heat transfer from the plate to rotating shaft.

1 . A spinning forming device comprising:
 a receiving jig supporting a central portion of a plate to be formed;   a rotating shaft to which the receiving jig is attached;   a heater configured to heat a transform target portion of the plate by induction heating; and   a processing tool configured to press the transform target portion to transform the plate, wherein   the receiving jig is configured to suppress heat transfer from the plate to the rotating shaft.   
     
     
         2 . The spinning forming device according to  claim 1 , wherein the receiving jig includes: a main body having a disk shape; and a heat insulator disposed between the main body and the plate or between the main body and the rotating shaft. 
     
     
         3 . The spinning forming device according to  claim 1 , wherein the receiving jig includes: a main body having a disk shape; and a ring portion projecting from a peripheral portion of the main body to contact the plate. 
     
     
         4 . The spinning forming device according to  claim 3 , wherein a cross-sectional shape of the ring portion is pointed toward the plate. 
     
     
         5 . The spinning forming device according to  claim 3 , wherein through holes or grooves are provided at the ring portion so as to connect an inner peripheral surface of the ring portion and an outer peripheral surface of the ring portion. 
     
     
         6 . The spinning forming device according to  claim 1 , wherein the receiving jig has a hollow structure whose internal space is filled with air or a vacuum. 
     
     
         7 . The spinning forming device according to  claim 1 , wherein:
 an opening is provided at a middle of the plate; and   the receiving jig includes   a main body which has a disk shape and on which an edge portion of the plate is placed, the edge portion surrounding the opening, and   a tubular portion which projects from the main body in an axial direction of the rotating shaft and is fitted in the opening.   
     
     
         8 . The spinning forming device according  claim 1 , further comprising:
 a fixing jig sandwiching the plate together with the receiving jig; and   a pressurizing rod to which the fixing jig is attached and which presses the plate against the receiving jig via the fixing jig, wherein   the fixing jig is configured to suppress the heat transfer from the plate to the pressurizing rod.   
     
     
         9 . The spinning forming device according to  claim 8 , wherein the fixing jig includes: a main body having a disk shape; and a heat insulator disposed between the main body and the plate or between the main body and the pressurizing rod. 
     
     
         10 . The spinning forming device according to  claim 8 , wherein the fixing jig includes: a main body having a disk shape; and a ring portion projecting from a peripheral portion of the main body to contact the plate. 
     
     
         11 . The spinning forming device according to  claim 10 , wherein a cross-sectional shape of the ring portion is pointed toward the plate. 
     
     
         12 . The spinning forming device according to  claim 10 , wherein through holes or grooves are provided at the ring portion so as to connect an inner peripheral surface of the ring portion and an outer peripheral surface of the ring portion. 
     
     
         13 . The spinning forming device according to  claim 8 , wherein the fixing jig has a hollow structure whose internal space is filled with air or a vacuum. 
     
     
         14 . A spinning forming device comprising:
 a receiving jig supporting a central portion of a plate to be formed;   a rotating shaft to which the receiving jig is attached;   a heater configured to heat a transform target portion of the plate by induction heating;   a processing tool configured to press the transform target portion to transform the plate; and   a fixing jig sandwiching the plate together with the receiving jig, wherein   the fixing jig is constituted by a peripheral wall and a ceiling wall so as to open toward the plate and is configured such that air supplied by an air blowing means to an inside of the fixing jig through an inlet provided at a center of the ceiling wall flows out through an outlet provided at the peripheral wall.   
     
     
         15 . The spinning forming device according to  claim 14 , wherein:
 the receiving jig is constituted by a peripheral wall and a bottom wall so as to open toward the plate and is configured such that the air supplied to the inside of the fixing jig is introduced to an inside of the receiving jig through an opening provided at the plate and is discharged through a discharge port provided at the peripheral wall.   
     
     
         16 . The spinning forming device according to  claim 15 , wherein:
 a through hole is provided at a region of the bottom wall of the receiving jig which overlaps the rotating shaft; and   an air passage through which the through hole communicates with a space around the rotating shaft is formed at the rotating shaft.   
     
     
         17 . The spinning forming device according to  claim 1 , wherein the heater is provided on an opposite side of the processing tool across the plate. 
     
     
         18 . The spinning forming device according to  claim 14 , wherein the heater is provided on an opposite side of the processing tool across the plate.