Warm extrusion method and mould for continuous equal-square channel with pre-stress structure

A prestressed structure, warm extrusion technology, applied in the direction of metal extrusion dies, etc., can solve the problems of die rupture, waste of time and money, delay of experimental research and process development progress, etc., to achieve the effect of improving strength and widening the scope

Inactive Publication Date: 2014-03-05
SHANDONG JIANZHU UNIV
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Problems solved by technology

However, due to the severe plastic deformation of the equal square channel warm extrusion process, the process has higher requirements for mold precision, strength, rigidity and life, and the t

Method used

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  • Warm extrusion method and mould for continuous equal-square channel with pre-stress structure
  • Warm extrusion method and mould for continuous equal-square channel with pre-stress structure
  • Warm extrusion method and mould for continuous equal-square channel with pre-stress structure

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Embodiment Construction

[0017] from figure 2 Shown mold assembly drawing of the present invention, figure 2 The prestressed combined die structure and image 3 It can be seen that the design details of the extrusion channel in the prestressed combined die can be seen that the present invention mainly includes 1. the lower template 2. the guide post 3. the hexagon socket screw 4. the guide sleeve 5. the upper template 6. the punch fixing plate 7. Cushion block 8. Positioning cylindrical pin 9. Punch plate 10. Hexagon socket screw 11. Punch 12. Die plate 13. Second layer die press sleeve 14. First layer die press sleeve 15. Die die 16. Concave Mold pad and other components. In the extrusion process, the materials used in the extrusion experiment are first cut by wire cutting, and then processed into a sample with a diameter of 10mm and a length of 80mm by cutting. After annealing, it is placed in a prestressed composite die structure Equal square channel warm extrusion extrusion die for extrusion,...

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Abstract

The invention discloses a warm extrusion method and a mould for a continuous equal-square channel with a pre-stress structure. The structural characteristics are that a reversed-bell-shaped double-layered combined concave mould pre-stress structure is adopted so that not only can mould materials be utilized effectively, but the bearing capability can also be guaranteed. The warm extrusion method comprises the following steps: analyzing a warm extrusion process of the continuous equal-square channel through finite elements by a continuous equal-square channel to obtain an optimized mould geometrical shape and a technological parameter; designing a warm extrusion experiment mould of the continuous equal-square channel according to basic requirements of low-carbon steel extrusion and molding; and improving a regular structure of a concave mould. The strength and the service life of a convex mould are not only considered in the aspect of the used materials, but also are guaranteed in the aspect of the structural design of the convex mould. With the adoption of the warm extrusion method and mould, the concave mould can be effectively prevented from being fractured; the service life of the mould is prolonged and the efficiency of experiment researches is improved; the time and the money are saved.

Description

technical field [0001] The invention relates to a continuous equal square channel warm extrusion die, in particular to an equal square channel warm extrusion die which adopts an inverted bell-shaped double-layer combined concave die prestressing structure and greatly improves the service life of the die. Background technique [0002] The traditional equal square channel warm extrusion process is to make the square extrusion part pass through two equal cross-section pipes at a certain angle under the action of the punch, so as to accumulate enough equivalent strain to achieve the purpose of grain refinement . [0003] However, the working conditions of the equal square channel extrusion process are extremely harsh. Therefore, the pre-realized extrusion of hard materials at room temperature will inevitably put forward higher requirements for mold precision, strength, rigidity and life. According to the requirements of the experiment, the optimized mold geometry and process pa...

Claims

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Application Information

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IPC IPC(8): B21C25/02B21C23/02
Inventor 徐淑波刘婷景财年
Owner SHANDONG JIANZHU UNIV
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