Manufacturing method of titanium alloy golf club head

Abstract

The invention provides a manufacturing method of a titanium-alloy golf club head. Problems of low transforming proportion between casting materials and casting objects and low yield rate of casting objects in the former casting methods are solved. The manufacturing method includes steps that a shell mold is positioned on a rotation platform and comprises a crucible part and a mold cavity part, wherein the crucible part is communicated with the mold cavity part; the rotation platform is connected to a rotation shaft; solid titanium-alloy casting materials are placed on the crucible part of the shell mold and are heated and fused into liquid titanium alloy in 35-45 seconds in a vacuum environment; the rotation shaft is driven to drive the rotation platform to rotate; the rotation speed of the rotation shaft is 500-800 rpm; the rotation speed of the rotation shaft is accelerated from 0-0.5s to 800-1400 rpm / sec, so the liquid titanium alloy is allowed to flow into the mold cavity part of the shell mold; the rotation speed of the rotation shaft is reduced until the rotation shaft stops, and then a casted shell mold is taken down; the shell mold is damaged, so a casting object comprising a casting piece part is obtained; and the casting piece part is separated from the casting object, so at least one titanium-alloy golf club head is obtained.

Description

technical field [0001] The invention relates to a manufacturing method of a golf club head, in particular to a manufacturing method of precision casting a titanium alloy golf club head. Background technique [0002] Generally speaking, golf clubs can be divided into three categories: woods, irons and putters. In order to reduce the weight of golf club heads and increase the freedom of design, many golf club heads are currently made of titanium alloy. Mainly, the manufacturing methods of these titanium alloy golf club heads are mostly smelting titanium alloy castings in the form of solid ingots in a vacuum environment, and precision molding by centrifugal casting. [0003] Among them, the melting method of titanium alloy casting generally adopts vacuum induction shell melting (Vacuum Induction Skull Melting, VISM), and in the melting process, in order to make the casting material pure, water-cooled copper crucible is usually used as the However, the water-cooled copper cruci...

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Problems solved by technology

[0003] Among them, the melting method of titanium alloy casting generally adopts vacuum induction shell melting (Vacuum Induction Skull Melting, VISM), and in the melting process, in order to make the casting material pure, water-cooled copper crucible is usually used as the However, the water-cooled copper crucible will reduce the superheat of the metal (Degree of Superheat), so that the molten liquid titanium alloy will re-solidify on the inner surface of the water-cooled copper crucible and form a shell with a thickness (ie The so-called "condensed shell"), so that the proportion of titanium alloy castings converted into castings is reduced, resulting in waste of titanium alloy castings and it is difficult to reduce casting costs, especially titanium is a relatively expensive metal, so how to improve the ratio of titanium alloy castings and The conversion ratio between castings has become a subject that needs to be improved urgently

[0004] On the other hand, when the titanium alloy golf club head is formed by the traditional centrifugal casting method, the molten liquid titanium alloy will be cooled and solidified to form a three-part casting including the sprue cup part, the runner part and the casting part. Among them, only the castings belong to the casting products, and the rest are casting wastes. Therefore, the yield rate of castings (yield, which is defined as: the total weight of casting products / the total weight of casting products and casting waste x100%) is difficult to improve. ;Taking the golf club head as an example, the casting rate of the casting formed by the traditional centrifugal casting method is only about 25% to 35%.

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