Die assembly for forming torsional lock bolt

A technology of die combination and anti-loosening bolts, applied in the direction of bolts, manufacturing tools, threaded fasteners, etc., can solve the problems of high cost, poor product accuracy, low processing efficiency, etc., and achieve high-speed production, good efficiency, high The effect of quality production

Active Publication Date: 2012-07-25
CHANGSHU TAOYUAN AUTO PARTS MFG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, turning processing is a method with very low processing efficiency, and the precision of the produced products is relatively poor, and the cost remains high.

Method used

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  • Die assembly for forming torsional lock bolt
  • Die assembly for forming torsional lock bolt
  • Die assembly for forming torsional lock bolt

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Experimental program
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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with specific examples.

[0030] like figure 2 As shown, the processing method of the torsional shear anti-loosening bolt of the present embodiment, its specific steps are carried out as follows:

[0031] Firstly, the process before hot heading is carried out, pickling, phosphating, spinning, blanking, chamfering and shrinking of the raw materials are carried out to obtain the blank to be shaped. Among them, the raw materials are pickled and phosphating, the purpose of which is to prepare for the shrinking process; wire drawing, that is, processing the optimal size according to product characteristics; chamfering, that is, lathe deburring to make the material fit into the mold better; The rod is ready for the following thread rolling process.

[0032] Then, carry out primary shaping, heat the billet, the heating temperature is 800~1000°C, transfer the heated billet to the No. 1 mold for ex...

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PUM

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Abstract

The invention discloses a die assembly for forming a torsional lock bolt, which belongs to the technical field of manufacture of fasteners. The die assembly comprises a first die and a second die which respectively comprise an upper die and a lower die. The bottom of the upper die of the first die is provided with a circular opening, the upper portion of the circular opening is provided with a conical hole, the upper portion of the conical hole is connected with a conical cavity, and the conical cavity retracts upwards and extends to the top of the upper die. The bottom of the upper die of the second die is provided with a circular opening, the upper portion of the circular opening is provided with a conical hole, the upper portion of the conical hole is connected with a square cavity, and the square cavity extends upwards to the top of the upper die. The top of each lower die is provided with a circular opening, the lower portion of the circular opening is provided with a conical hole, and the lower portion of the conical hole is connected with the circular cavity. The die assembly can be used for forming a body of the torsional lock bolt by means of hot heading, so that the problems of high cost, low efficiency and poor precision in traditional turning are avoided, and high-efficiency, high-speed and high-quality production of the torsional lock bolt is realized.

Description

technical field [0001] The invention belongs to the technical field of fastener manufacturing, and in particular relates to a bolt processing die. Background technique [0002] A torsional shear anti-loosening bolt is widely used in cement machinery and equipment, basically replacing common countersunk head bolts. as attached figure 1 As shown, this torsional shear anti-loosening bolt includes a square head, a torsional shear portion, a large round head and a rod portion, and the above-mentioned parts are connected in sequence. The surface of the bolt is coated with molybdenum disulfide, which is mainly used for lubrication. The threaded parts of the bolts are also coated with anti-loose glue produced in Germany, which is mainly used for anti-loosening and anti-slip, so that the bolts and nuts are closely matched. When using the installation process, tighten this bolt with a power tool. When the pre-tightening force reaches the design value, the torsional shear part of t...

Claims

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Application Information

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IPC IPC(8): B21J13/02B21K1/44
Inventor 王建冯念强
Owner CHANGSHU TAOYUAN AUTO PARTS MFG CO LTD
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