Precision forging method of railroad car fastener and die using the method
The invention relates to a method for precision forging of a fastener used in railway vehicle and a die used in the method. The forging method comprises the following steps: (1) a pre-forged piece with a fastener groove of 30-60 degrees is forged and molded on a die hammer; (2) the pre-forged piece...
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| creator | GAO YANG WANG ZHIGUO GONG XIANYU GU ZHIFEI |
| description | The invention relates to a method for precision forging of a fastener used in railway vehicle and a die used in the method. The forging method comprises the following steps: (1) a pre-forged piece with a fastener groove of 30-60 degrees is forged and molded on a die hammer; (2) the pre-forged piece of the fastener is bent and shaped to form a groove of 7 degrees by dies and a friction press; (3) edges are cut by a press. The dies used in the step (2) comprise a lower die, an upper die, a spring, a guide post and a baffle. The upper die is provided with a left and a right die blocks which form an integrated die impression, are closely attached to each other in the horizontal direction and are capable of moving relatively in the vertical direction. A bulge corresponding to the shape of the groove of the forged piece and a boss for positioning the forged piece are arranged on the lower die. The invention has the advantages of adequately utilizing the particularity of the shape of the fastener, adding a bending s |
| format | Patent |
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The forging method comprises the following steps: (1) a pre-forged piece with a fastener groove of 30-60 degrees is forged and molded on a die hammer; (2) the pre-forged piece of the fastener is bent and shaped to form a groove of 7 degrees by dies and a friction press; (3) edges are cut by a press. The dies used in the step (2) comprise a lower die, an upper die, a spring, a guide post and a baffle. The upper die is provided with a left and a right die blocks which form an integrated die impression, are closely attached to each other in the horizontal direction and are capable of moving relatively in the vertical direction. A bulge corresponding to the shape of the groove of the forged piece and a boss for positioning the forged piece are arranged on the lower die. 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The forging method comprises the following steps: (1) a pre-forged piece with a fastener groove of 30-60 degrees is forged and molded on a die hammer; (2) the pre-forged piece of the fastener is bent and shaped to form a groove of 7 degrees by dies and a friction press; (3) edges are cut by a press. The dies used in the step (2) comprise a lower die, an upper die, a spring, a guide post and a baffle. The upper die is provided with a left and a right die blocks which form an integrated die impression, are closely attached to each other in the horizontal direction and are capable of moving relatively in the vertical direction. A bulge corresponding to the shape of the groove of the forged piece and a boss for positioning the forged piece are arranged on the lower die. 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The forging method comprises the following steps: (1) a pre-forged piece with a fastener groove of 30-60 degrees is forged and molded on a die hammer; (2) the pre-forged piece of the fastener is bent and shaped to form a groove of 7 degrees by dies and a friction press; (3) edges are cut by a press. The dies used in the step (2) comprise a lower die, an upper die, a spring, a guide post and a baffle. The upper die is provided with a left and a right die blocks which form an integrated die impression, are closely attached to each other in the horizontal direction and are capable of moving relatively in the vertical direction. A bulge corresponding to the shape of the groove of the forged piece and a boss for positioning the forged piece are arranged on the lower die. The invention has the advantages of adequately utilizing the particularity of the shape of the fastener, adding a bending s</abstract><oa>free_for_read</oa></addata></record> |
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| language | chi ; eng |
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| subjects | FORGE FURNACES FORGING HAMMERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING TRANSPORTING |
| title | Precision forging method of railroad car fastener and die using the method |
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