Quenching tool and quenching method

Abstract

A quenching tool is used for quenching a quenching object which includes a disc-shaped race having a race through hole. The quenching tool includes a support mesh having a first support portion configured to be in contact with the quenching object, and support wires which are a plurality of second support members each having a second support portion configured to be in contact with the quenching object. A position of the second support portion is offset in a normal direction with respect to the first support portion. Further, the position of the second support portion is also offset in a direction of an axis contained in an in-plane direction orthogonal to the normal with respect to the first support portion.

1 . A quenching tool, which is a quenching tool for a quenching object including a disc-shaped portion having a through hole, comprising:
 at least one first support member including at least one first support portion configured to be in contact with the quenching object; and   at least one second support member including at least one second support portion configured to be in contact with the quenching object, wherein   a position of the second support portion is offset in a direction of a first axis with the first support portion as a reference, and   the position of the second support portion is also offset in a direction of a second axis orthogonal to the first axis with the first support portion as a reference.   
     
     
         2 . The quenching tool according to  claim 1 , wherein a distance from the first support portion to the second support portion is larger than a radius of the quenching object. 
     
     
         3 . The quenching tool according to  claim 2 , wherein
 the first support member is a planar member including the first support portion, and   the second support member is a linear member including the second support portion.   
     
     
         4 . The quenching tool according to  claim 3 , wherein
 the number of the first support members is one,   the first support member includes a plurality of first support portions,   the number of the second support members is plural,   the second support member includes one second support portion,   the plurality of second support members are disposed apart from each other in a direction intersecting a direction in which the second support members extend,   the plurality of second support members are each in contact with a main surface of the quenching object, and   the plurality of second support members each support one quenching object.   
     
     
         5 . The quenching tool according to  claim 3 , wherein
 the number of the first support members is one,   the first support member includes a plurality of first support portions,   the number of the second support members is at least one,   the second support member is inserted through the through hole of the quenching object,   the second support member includes at least one second support portion, and   the second support member supports at least one quenching object.   
     
     
         6 . The quenching tool according to  claim 3 , wherein
 the number of the first support members is one,   the number of the second support members is at least two,   the second support member extends in a normal direction of a support surface including the first support portion of the first support member, and   a base end of the second support member is fixed to the first support member.   
     
     
         7 . The quenching tool according to  claim 2 , wherein
 the first support member is a linear member including the first support portion, and   the second support member is a linear member including the second support portion.   
     
     
         8 . The quenching tool according to  claim 7 , wherein
 the number of the first support members is plural,   the first support member includes one first support portion,   the number of the second support members is at least one,   the second support member includes at least one second support portion,   the second support member is inserted through the through hole of the quenching object,   the second support member supports at least one quenching object, and   the plurality of first support members are respectively in contact with main surfaces of a plurality of quenching objects.   
     
     
         9 . A quenching method comprising:
 a first step of preparing a quenching object including a disc-shaped portion having a through hole;   a second step of disposing the quenching object in a quenching tool; and   a third step of immersing the quenching object disposed in the quenching tool in a cooling oil, wherein   in the second step, the quenching object is disposed in the quenching tool so that a posture of the quenching object when immersed in the cooling oil is inclined with respect to a horizontal direction which is orthogonal to an axis of the through hole in a vertical direction.