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Extruding method and mould for high-strength low carbon steel round head rivet

A technology of round head rivet and extrusion method, applied in the direction of metal extrusion die, etc., can solve problems such as low work efficiency, and achieve the effects of reducing labor intensity, improving material properties, and refining grains

Inactive Publication Date: 2014-03-19
SHANDONG JIANZHU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The equal channel angular extrusion process is currently the most effective method for grain refinement, but the traditional ECAP device can only perform single-pass extrusion, and it needs to manually switch between different passes and different paths, resulting in low work efficiency. The purpose of grain refinement can only be achieved after multi-pass extrusion

Method used

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  • Extruding method and mould for high-strength low carbon steel round head rivet
  • Extruding method and mould for high-strength low carbon steel round head rivet
  • Extruding method and mould for high-strength low carbon steel round head rivet

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Embodiment Construction

[0018] From figure 1 Shown mold assembly drawing of the present invention, figure 2 The prestressed combined die structure, image 3 The top view of the prestressed combined die and Figure 4 It can be seen from the design details of the extrusion channel in the left view of the prestressed combined die that the present invention mainly includes 1. Lower template 2. Guide pillar 3. Hexagon socket screw 4. Guide sleeve 5. Upper template 6. Punch fixed plate 7. Positioning cylindrical pin 8. Punch plate 9. Hexagon socket screw 10. Punch 11. Die plate 12. Second layer of die press sleeve 13. First layer of die press sleeve 14. Die 15. Block 16 . Die backing plate 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 12mm and a length of 40mm by cutting. For the angle extrusion die, due to the limited length of the punch, when the extruded part enters th...

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Abstract

The invention discloses a novel mould for preparing a high-strength low carbon steel material at a room temperature. The method is characterized in that: the mechanical property of low carbon steel is improved by fierce plastic deformation, wherein the adopted fierce plastic deformation device is an improved conventional ECAP technology mould, which can realize C route continuous ECAP extrusion, the female mould adopts a double-layer prestressed composite female mould structure, thus the mould material is effectively utilized, and the bearing performance is guaranteed at the same time. The method can effectively avoid the rupture of the female mould, prolongs the service life of mould, improves the efficiency of research or experiment, and saves the time and money.

Description

technical field [0001] The invention relates to an extrusion method and mold for preparing high-strength low-carbon steel round-head rivets at room temperature, in particular to an extrusion mold for one-time forming of round-head rivets. [0002] Background technique [0003] Round head rivets, also known as semi-round head rivets, are composed of round head nail caps and nail bodies, and are often used as riveting fasteners on steel structures such as boilers, bridges, and containers. Low carbon steel refers to alloy steel with a carbon content of 0.10% to 0.30%. Low carbon steel is easy to accept various processing such as forging, welding and cutting, and is often used to make chains, rivets, bolts, shafts, etc. Round head rivets are often made of low carbon steel. [0004] The general processing technology of low-carbon steel round head rivets has two kinds of cold heading and high-speed turning processing, and appropriate heat treatment afterwards, but the cold head...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/02B21C25/02
Inventor 徐淑波刘婷赵中魁刘鹏
Owner SHANDONG JIANZHU UNIV
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