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Wedge-shaped variable modulus multipore-lubricating spline shaft extrusion die with surface texture

An extrusion die and surface texture technology, applied in the direction of metal extrusion dies, etc., can solve the problems that the bottom of the spline shaft is easy to fold, affect the yield of the extruded spline shaft, and the dimensional accuracy is not high, so as to avoid the folding phenomenon , reduce the material accumulation phenomenon, reduce the effect of resistance

Active Publication Date: 2016-06-08
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cold extrusion processing is to control the flow of metal through the mold, so as to realize the large transfer of metal volume to form parts, but the commonly used extrusion molds today generally have the disadvantages of simple structure, large stress, and high friction, especially extrusion flowers. For tooth-shaped parts such as keys, the dimensional accuracy is not high. Due to the high extrusion force, it is difficult to control the metal flow. Most of the metal is not used to form the tooth shape but moves with the mold, resulting in metal accumulation, and the bottom of the spline shaft is also Easy to fold, which seriously affects the yield of extruded spline shaft

Method used

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  • Wedge-shaped variable modulus multipore-lubricating spline shaft extrusion die with surface texture
  • Wedge-shaped variable modulus multipore-lubricating spline shaft extrusion die with surface texture
  • Wedge-shaped variable modulus multipore-lubricating spline shaft extrusion die with surface texture

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] refer to figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 , a wedge-shaped variable modulus porous lubricated spline shaft extrusion die with surface texture, comprising an extrusion die 2 and a prestressing die fixing sleeve 1 connected externally, the prestressing die fixing sleeve 1 and the extrusion die 2 are Interference fit, the interference amount is 0.25mm, the sealing ring 3 is installed at the joint between the prestressing die fixing sleeve 1 and the extrusion die 2, and the sealing ring 3 is a metal sealing gasket, and the material is pure copper.

[0025] refer to Figure 4 and Figure 5 , the extrusion die 2 is provided with an upper bevel section I, a middle forming section II, and a wedge-shaped transition section III.

[0026] refer to figure 2 , image 3 , the wedge-shaped transition section III tooth modulus of the extrusi...

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Abstract

A wedge-shaped variable modulus multipore-lubricating spline shaft extrusion die with surface texture comprises an extrusion die and a prestress die fixing sleeve externally connected with the same, the prestress die fixing sleeve is in interference fit with the extrusion die, a seal ring is fitted to a fit position of the prestress die fixing sleeve with the extrusion die, the extrusion die includes an upper bevel segment, a middle forming segment and a wedge-shaped transition segment, tooth profile modulus of the wedge-shaped transition segment increases gradually from bottom to top, tooth thickness decreases gradually from bottom to top, tooth height decreases gradually from bottom to top, bevels of the middle forming segment and the wedge-shaped transition segment are laser nicked, and the surface texture is formed to reduce friction. Metal flow in the forming process is controlled by varying the die tooth profile modulus, so that acceptability rate of extruded spline shafts is increased.

Description

technical field [0001] The invention belongs to the technical field of extrusion molding dies, in particular to a wedge-shaped variable modulus porous lubricating spline shaft extrusion die with surface texture. Background technique [0002] Splines have been widely used in aerospace, automobile industry, petrochemical and other industrial sectors, so splines are required to have high precision and mechanical properties. Forming spline shafts by cold extrusion can significantly improve processing efficiency, and forming The spline hardness is relatively high. Cold extrusion forming is a precision plastic volume forming technology. It refers to putting the metal blank into the mold or clamping mechanism in a cold state. The workpiece blank is formed in the mold cavity to obtain extrusions with required dimensions and mechanical properties. Cold extrusion processing is to control the flow of metal through the mold, so as to realize the large transfer of metal volume to form p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02B21C23/32
CPCB21C23/32B21C25/02
Inventor 张琦贲宁宇杨凯张以升韩宾
Owner XI AN JIAOTONG UNIV
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