Shaft part extrusion forming die and extrusion forming method
A technology for extrusion forming and shaft parts, which is applied in the direction of metal extrusion dies, etc., can solve problems such as the inability to achieve smooth demoulding of ultra-long shaft parts, and achieve the effect of reducing equipment investment.
Active Publication Date: 2014-01-29
HENAN UNIV OF SCI & TECH
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Problems solved by technology
[0005] The purpose of this invention is to provide a shaft extrusion molding die to solve the problem that the smooth demoulding of super long shaft parts cannot be achieved in the prior art
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[0027] An embodiment of a shaft part extrusion molding die of the present invention: as Figure 1~4 As shown, the extrusion molding die includes an upper mold part and a lower mold part, and the upper mold part includes a detachably connected upper mold base 9, an upper backing plate 8, a punch fixing plate 7 and a convex mold fixedly connected with the punch fixing plate 7. The center of the punch is provided with a central through hole extending along its axis. The punch is a split structure. The punch includes a movable part 5 below the fixed part 6. The fixed part 5 has a fixed connection with the punch fixed plate 7. The fixed end of the movable part is provided with a stepped surface on the outer peripheral surface of the movable part, and the stepped surface is set away from the fixed end of the fixed part. The diameter of the diameter part is smaller than the diameter of its adjacent two sides, and the movable part and the fixed part are respectively provided with inte...
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The invention relates to a shaft part extrusion forming die which comprises a male die and a female die, wherein the male die has a split type structure and comprises a fixed part and a movable part; a fixed end is arranged on the fixed part; connection parts are respectively arranged on the fixed part and the movable part. The invention also relates to an extrusion forming method for extruding a shaft part by using the extrusion forming die. The extrusion forming method comprises the steps of 1) putting a blank into the female die, putting the movable part on the upper end face of the blank, and enabling a press to drive the fixed part to move downwards and push the movable part to extrude the blank; 2) after the extrusion is finished, enabling the press to drive the fixed part to return, eject the movable part and a workpiece and implement demolding or enabling the press to drive the fixed part to move upwards until the workpiece is separated from the fixed part and to drive the fixed part to move in parallel to one side on which the fixed part is staggered from the movable part, eject the movable part and the workpiece and implement the demolding. The shaft part extrusion forming die and the extrusion forming method which are disclosed by the invention can realize extrusion forming of long shaft parts and reduce the equipment investment for long shaft part extrusion forming.
Description
technical field [0001] The invention relates to the technical field of extrusion forming of metal materials, in particular to an extrusion forming die and an extrusion forming method for shaft parts. Background technique [0002] Usually, the total length L is greater than the maximum mold opening height H of the general-purpose four-column hydraulic press minus half of the distance h from the upper end of the die to the bottom of the lower mold base, that is, shaft parts with L≧(H-h) / 2 are called super long shaft parts, The half-shaft part is a kind of shaft part. When the length of the half-shaft part to be formed is larger than that, due to the long diameter of the part, it is easy to be unstable when it is formed by a flat forging machine or a friction press. It cannot be formed at one time; while radial forging machines are used, the equipment investment is large, the production efficiency is low, and the versatility is not strong. Press forming. [0003] Existing ext...
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IPC IPC(8): B21C25/02B21C23/18
Inventor 宋克兴周延军赵培峰张学宾郜建新张彦敏国秀花刘亚民张亚白宁李宁宁乔艳艳何霞张素霞赵亚永
Owner HENAN UNIV OF SCI & TECH