Tool manufacturing method and tools produced thereby
AssigneeFlozfirm Technology Research Co., Ltd.
InventorPEI-HUA CHEN
Life of this patent
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Abstract
A tool manufacturing method includes the steps of preparing a cylindrical blank, dividing the blank into sections, changing an outer diameter of one of the sections, and shaping the sections to complete a tool. During the shaping step, the section whose outer diameter is changed is shaped into a symmetrical polygon for serving as a head portion of the tool and shaping another section to obtain a polygon with alternate concavities and convexities thereon for serving as an engaging portion of the tool. Accordingly, the progressive execution of the method prevents the deterioration of the blank made of a high carbon content metal material, allows the tool to keep good mechanical properties, increases the manufacturing efficiency, and reduces manufacturing costs.
Claims15
A tool manufacturing method for making a tool having opposite first and second ends, a head portion extending from said first end and being in a shape of a symmetrical polygon, and an engaging portion formed between said head portion and said second end and having a form of a polygon with alternate concavities and convexities, said method comprising:
- a preparation step (a) which includes preparing a cylindrical blank;
- a section-subdividing step which includes processing said blank to thereby divide said blank into a first section and a second section;
- and
- a shaping step which includes executing a preparatory shaping operation and a shape processing operation, wherein said preparatory shaping operation includes changing an outer diameter of said first section by pressing to make said outer diameter of said first section different from an outer diameter of said second section, said shape processing operation being executed after said preparatory shaping operation, said shape processing operation including shaping said first section into said symmetrical polygon for serving as said head portion of said tool and shaping said second section to form said polygon with alternate concavities and convexities thereon whereby said second section serve as said engaging portion of said tool after being shaped.
Dependencies are inferred from the claim text.