| 摘要 |
PURPOSE: A method for manufacturing sheave and pulley is provided to improve quality of products and easily mass-produce products with various dimensions by using a roller pressing and forming process. CONSTITUTION: The method for manufacturing sheave and pulley comprises the processes of completing a sheave material by inserting a sheave boss into inner diameter of a machined sheave form(415) in high frequency shrinkage fitting, and bonding both side surfaces of the sheave form(415) in a shape of front part and boss welding part of the sheave boss; symmetrically installing a main shaft spindle(380) and a driven shaft spindle(400) which are operated in hydraulic driving type instead of a pressing formation rolling unit that is a manufacturing equipment of sheave and belt pulley, and fixing the sheave form(415) between both side spindles so that the sheave form(415) is closely adhered to a surface plate key of the main shaft part and a surface plate key of the driven shaft part; simultaneously operating a high frequency equipment and heating the sheave form(415) to a temperature of 700 to 1200 deg.C as rotating the sheave form(415) in a certain speed after setting up a high frequency heating high frequency coil on the circumferential surface of the installed sheave form(415) by a high frequency thermocouple pad; and producing a sheave finished product by form cutting the hot formed sheave form with a No. 5 tool post after finishing hot forming of the sheave form with No. 1, 2, 3 and 4 tool posts by controlling positions of guide roller adjusting cylinders(100) and operating a tool post die-set block in which a tool post die-set is assembled for pressing formation so that the tool post die-set block presses on the circumferential surface of the heated sheave form.
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