Method for fracturing metal component, and method for fracturing connecting rod

A technology of metal parts and parts, applied in the field of fracture of connecting rods, can solve the problem that the fracture surface cannot be obtained, and achieve the effect of suppressing three-dimensional offset and simple cost burden
CN113165201AActive Publication Date: 2021-07-23YASUNAGA CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YASUNAGA CORP
Publication Date
2021-07-23

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Abstract

The present invention relates to a method for fracturing a metal component 1, B which has a prescribed through hole 5a, and which has a groove portion 17 formed continuously from a first open end of the through hole to a second open end thereof, at a position corresponding to an inner circumferential surface of the through hole. The method enables the metal component to fracture from the groove portion, and includes identifying a position delta, delta1, delta2 in the groove portion of the metal component at which stress is to be caused to concentrate when the metal component starts to fracture; forming a stress concentration portion 19 in a position in a bottom portion of the groove portion corresponding the identified position in the groove portion, in order to set the identified position as a failure starting point; and causing a crack S1 to be generated from the stress concentration portion 19 on the groove portion earlier than at each portion of the groove portion when the metal component begins to fracture, thereby causing a crack S2 to develop from each portion of the groove portion.
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Description

technical field

[0001] The present invention relates to a method of fracturing a metal part broken from a through hole and a method of fracturing a connecting rod. Background technique

[0002] Metal parts having through-holes may be used as a pair of products by combining parts broken and divided from the through-holes. A connecting rod (hereinafter referred to as a connecting rod) is known as a typical metal part.

[0003] In the connecting rod, a load is applied to the through hole of the large end in the direction of expansion, the large end is broken and divided into a main body and a cover, and the unevenness generated on the broken fracture surface is used for positioning, thereby When fastening the main body portion and the cover portion with bolts, positioning can be performed with high precision even in a state in which positioning pins are omitted.

[0004] The connecting rod is often configured such that grooves are formed continuously from the opening end on o...

Claims

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