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Near-net forming method of high-strength internal hexagon bored bolt

A near-net-shaping, high-strength technology, applied to nuts, forming tools, threaded fasteners, etc., to achieve high production efficiency, prevent deviation, and convenient and simple operation

Active Publication Date: 2013-08-14
ZHONGBEI UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the prior art and propose a near-net forming method for high-strength internal hexagonal through-hole bolts. The purpose is to effectively overcome the problems caused by the existing traditional processing and manufacturing methods, effectively reduce the forming process, and greatly Improve material saving manufacturing cost

Method used

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  • Near-net forming method of high-strength internal hexagon bored bolt
  • Near-net forming method of high-strength internal hexagon bored bolt
  • Near-net forming method of high-strength internal hexagon bored bolt

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Embodiment Construction

[0034] The present invention specifically illustrates the near-net-shaping method of hexagonal inner through-hole bolts and the mold used therefor through specific examples.

[0035] A near-net-shaping method for high-strength hexagonal through-hole bolts, the sequence comprising:

[0036] (1), pipe blanking (such as figure 1 shown);

[0037] (2), cold extrusion, machining, heat treatment annealing, surface treatment and lubrication;

[0038] (3), put the processed hollow blank 2 into the die cavity 101 of the forming die 10 of a high-strength inner hexagonal through-hole bolt near the net forming die (such as Figure 11 shown), such as image 3 As shown, the mold mainly includes an upper template 3, a movable briquetting block 4, a fixed plate 5 on the punch, a forming inner hexagonal through-hole punch 6, a forming head boss briquetting block 8, a material punching seat 7, and a material punching plate 15 (as Figure 8 shown), die prestressing ring 9, forming die 10, ba...

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Abstract

The invention discloses a near-net forming method of a high-strength internal hexagon bored bolt. The method includes: firstly, feeding a pipe; secondly, cold-extruding, machining, thermally annealing, surface-treating, and lubricating; thirdly, placing a treated hollow blank into a cavity of a forming die of a forming tool for a high-strength internal hexagon bored bolt, forming an internal hexagon bore and a boss on the bolt, smoothly ejecting an extruded part out of the die; and fourthly, cutting ends and threads on the near-net-shaped extruded part to obtain a standard internal hexagon bored bolt. The method is convenient and simple to operate and high in production efficiency, has fewer machining procedures compared with those of the traditional method, has effectively lowered production cost, and is suitable for batch production.

Description

technical field [0001] The invention belongs to the plastic cold extrusion processing and forming technology of metal materials, that is, the near-net forming technology, in particular to a near-net forming method of high-strength internal hexagonal through-hole bolts. Background technique [0002] The hexagon socket bolts in the end couplings on tracked vehicles are one of the important parts of this type of vehicle. Traditionally, solid structures are used. The traditional solid structure has a long production cycle, high manual labor intensity, and serious waste of materials, making it difficult to meet the needs of mass production. The current development trend is that the mobility of the vehicle must be reduced in order to improve its maneuverability. However, the amount of hexagon socket head bolts in the whole vehicle is quite large. If the hexagon socket head bolts are changed to hexagon socket through hole structures, the demand for vehicle weight reduction can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D53/24B21D37/10
Inventor 张治民于建民王强孟模李旭斌张宝红张星杨勇彪谢志平
Owner ZHONGBEI UNIV
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