Quenching apparatus for hollow structural component and quenching method

Abstract

To provide a quenching apparatus capable of surely quenching with less fear of uneven quenching and deformation with respect to a hollow member. This quenching apparatus has: a set of inner part restraining tools having the outer shapes almost corresponding to the shapes of the respective inner peripheries at both end parts of the cylindrical hollow member opened at both end parts; end part restraining tools provided with a set of outer part restraining tools; abutting tools holding by abutting a part in the hollow member; and a means for performing cooling by inserting the inner restraining tools at both end parts of the heated hollow member under abutting state of the abutting tools at a prescribed position. That is, the intrusion of cooling liquid into the inner part of the hollow member is restrained by inserting the inner part restraining tools at both end parts of the hollow member and thus, the cooling unevenness is restrained and also, the strain caused by the end part restraining tools and the abutting tools, is restrained.

Description

technical field [0001] The present invention relates to a quenching device and a quenching method capable of performing high-quality quenching on a hollow member. Background technique [0002] Recently, for the weight reduction of automotive parts, hollow members are often used. For example, some people have begun to use hollow tubes as intermediate beam components to replace the previous members that processed steel plates into U-shaped cross-sections. [0003] However, when such a long hollow member is quenched, if the conventional press quenching is applied, there will be such problems that the internal cooling is slow and the quenching is insufficient; or the material softened by heating to the quenching temperature is The interior is hollow and long, so it is easy to break due to extrusion. [0004] Conventionally, Patent Document 1 is disclosed as a quenching device for elongated members. The device disclosed in Patent Document 1 is a constrained quenching device ch...

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Problems solved by technology

[0003] However, when such a long hollow member is quenched, if the conventional press quenching is applied, there will be such problems that the internal cooling is slow and the quenching is insufficient; or the material softened by heating to the quenching temperature is The interior is hollow and long, so it is easy to break due to extrusion

However, for a hollow member whose cross-sectional shape has a complex shape such as an abnormal shape in the longitudinal direction, there is a disadvantage that it is necessary to design and manufacture a mold having a complicated shape. convex part

In addition, no matter how many convex parts are formed with the mold member, the quenching liquid sprayed from the ejection port of the concave part is difficult to reach the part facing the convex member, and the quenching may be insufficient.

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