Quenching processing apparatus

Abstract

The present invention includes: a conveying mechanism ( 110 ) that conveys a workpiece ( 200 ) in the longitudinal direction; a supporting mechanism ( 120 ) that is arranged on the downstream side in the conveyance direction of the workpiece ( 200 ) from the conveying mechanism ( 110 ); and a heating mechanism ( 130 ) that is arranged on the downstream side in the conveyance direction of the workpiece ( 200 ) from the supporting mechanism ( 120 ) and heats the workpiece ( 200 ), in which the supporting mechanism ( 120 ) is formed to include support rolls ( 121 ) that abut on an outer surface of the workpiece ( 200 ) and each include a hollow structure ( 122 ) allowing a cooling medium to pass therethrough therein.

1 . A quenching processing apparatus that processes a workpiece, the quenching processing apparatus comprising:
 a conveying mechanism that conveys the workpiece in the longitudinal direction;   a supporting mechanism that is arranged on the downstream side in the conveyance direction of the workpiece from the conveying mechanism and supports the workpiece; and   a heating mechanism that heats the workpiece, wherein   the supporting mechanism includes rolls that abut on an outer surface of the workpiece and each include a hollow structure allowing a cooling medium to pass therethrough therein, and   the roll is formed by including an outer ring portion that abuts on the outer surface of the workpiece;   a shaft that is arranged at an inner side of the outer ring portion, supports the outer ring portion rotatably, and includes the hollow structure therein; and   a sliding bearing arranged between the outer ring portion and the shaft.   
     
     
         2 . The quenching processing apparatus according to  claim 1 , further comprising:
 a holding mechanism that is arranged on the downstream side in the conveyance direction of the workpiece from the heating mechanism and is capable of holding the workpiece and additionally, adding a bending load to the workpiece.   
     
     
         3 . The quenching processing apparatus according to  claim 1 , wherein
 the outer ring portion is formed of a non-magnetic material.   
     
     
         4 . The quenching processing apparatus according to  claim 3 , wherein the non-magnetic material is ceramic or resin. 
     
     
         5 . The quenching processing apparatus according to  claim 1 , wherein
 the shaft is fixed to roll holders to be incapable of rotation.   
     
     
         6 . The quenching processing apparatus according to  claim 1 , wherein
 the inner side of the outer ring portion is a cylindrical shape and is flat in section view.   
     
     
         7 . The quenching processing apparatus according to  claim 1 , wherein
 a slit is formed in the sliding bearing over an entire region in the axial direction of the sliding bearing.   
     
     
         8 . The quenching processing apparatus according to  claim 1 , wherein
 a plurality of the sliding bearings are provided continuously in the axial direction of the roll.   
     
     
         9 . The quenching processing apparatus according to  claim 1 , wherein
 a hardness of the sliding bearing is smaller than a hardness of the shaft.   
     
     
         10 . The quenching processing apparatus according to  claim 1 , wherein
 the sliding bearing is inserted into the outer ring portion by interference fit.   
     
     
         11 . The quenching processing apparatus according to  claim 1 , wherein
 the supporting mechanism is formed in which a plurality of the rolls are arranged side by side at different positions in the conveyance direction of the workpiece.   
     
     
         12 . The quenching processing apparatus according to  claim 1 , further comprising:
 a cooling mechanism that is arranged on the downstream side in the conveyance direction of the workpiece from the heating mechanism and cools a heated portion of the workpiece heated by the heating mechanism.   
     
     
         13 . The quenching processing apparatus according to  claim 2 , wherein
 the outer ring portion is formed of a non-magnetic material.