Fastening member having a variable volume and method for molding same

Abstract

The present invention relates to a fastening member having a variable volume, and to a method for molding same. Specifically, a molding member (100) having a molding groove (110) is provided, and melted steel fills the molding groove (110) of the molding member (100) so as to cast a fastening member (200) having the shape of a nut. The method for molding the fastening member consists of: a step (S10) of forming a recess part (111) in an upper end of an inner surface of the molding groove (110) of the molding member (100), and then forming a protrusion (221) on an outer surface when the fastening member (200) is formed so as to manufacture the molding member (100) having the circular molding groove (110) and the recess part (111) in the inner surface of the molding groove (110); a step (S20) of filling melted steel into the molding groove (110) of the molding member (100) so as to cast the fastening member (200) having the protrusion (221); and a step (S30) of forming an insertion groove (22) in a top surface of a flange part (220) of the fastening member (200) molded through the step (S20) of molding the fastening member so as to insert a magnetic body (223) into the insertion groove (222). Since the fastening member has a variable volume, when the groove is formed in the fastening member, it may prevent the outer appearance of the fastening member from being deformed so as to improve product quality. Further, the fastening member may be moldable so as to improve workability when the fastening member is applied.

Description

technical field [0001] The invention relates to a variable-volume binding member and a forming method (Fastening member of body capacity changeable), especially for preventing the shape deformation of the joining member when grooves are made on the joining member such as nuts or bolts. Background technique [0002] Generally, when two adjacent parts are combined, joints such as nuts and bolts are used. [0003] In this way, the process of combining nuts and bolts is as follows: after a pair of components to be combined are adjacent to each other between the nuts and bolts, the nuts and bolts are combined through the combination holes formed on the components. . [0004] On the one hand, in order to tighten the nuts and bolts, it is actually necessary to make the nuts and bolts rotate the number of turns of the thread until they are screwed to the point where they cannot be tightened completely. [0005] If a large number of nuts and bolts need to be tightened, the combined...

AI Technical Summary

Problems solved by technology

[0010] However, traditional bindings 10 such as figure 1 As shown in (b), after the mold is formed, the upper end is grooved, and the magnetic body 11 is inserted into the groove, so there is a problem that the upper end surface of the joint 10 will be deformed, and there is also a problem that the groove and the The problem that the space between the outer diameters of the coupling member 10 is narrowed and the strength is lowered

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