| 摘要 |
PURPOSE:To manufacture very easily gear parts, etc. whose all uneven faces consist of a smooth cut face, by continuously executing heat punching and heat shaving by one stroke, in a state that a thick-walled blank material is heated to a necessary temperature. CONSTITUTION:In general, a thick-walled blank material 1 consisting of carbon steel of S45C, etc. is charged into a heating furnace 2, and is heated to a temperature (600-900 deg.C) at which no constituting cutter edgelike adhering matter is generated on a die at the time of working. Subsequently, the heating blank material 1 is charged into a press die A provided with a special two-stage die, and base contour blank forming approximate to a product contour, and shaving are executed continuously by one stroke of a punch 3. That is to say, the heating blank material 1 is charged into the press die on which the punch 3, a preliminary contour punching die 5 opposed to said punch, and a shaving die 6 are provided in tages. In this way, a base contour blank 17 is hot-formed by one stroke by this press die, and also the blank 17 is finished to a product shape by hot shaving, and is cooled, by which thick gear, etc. 19 are obtained. |
