Process for manufacturing quincuncial dowel screws

A double-ended screw and manufacturing process technology, applied in the field of plum-blossom double-ended screw manufacturing technology, can solve the problems of high processing cost, high processing time, affecting product quality and output, etc., to achieve reliable product quality assurance, reduce labor intensity, The effect of controlling costs

Inactive Publication Date: 2012-07-25
苏州新凌电炉有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the processing of this kind of double-headed screws requires the use of lathes, milling machines, grinding, polishing and other machine processing procedures. The processing hours are extremely high, and the processing loss materials account for more than 105% of the product, resulting in very high processing costs. Moreover, the size of the product, The concentricity, brightness and chamfering are unstable, and the difference is large, and the scrap rate accounts for more than 7%, which affects the quality and output of the product

Method used

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  • Process for manufacturing quincuncial dowel screws
  • Process for manufacturing quincuncial dowel screws

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Embodiment Construction

[0017] The present invention is described below in conjunction with accompanying drawing.

[0018] as attached figure 1 Shown is a kind of torx-shaped double-ended screw manufacturing process according to the present invention, which mainly includes the following steps:

[0019] (1) Cutting material: use a solid cylinder made of low-carbon martensitic steel as the raw material, and select a workpiece A with a diameter of 7mm and a length of 61mm according to the volume of the product after molding;

[0020] (2) Double chamfering: put the workpiece A obtained in step (1) into the mold of the first station cold heading machine, and perform round chamfering on both ends of the workpiece to obtain workpiece B;

[0021] (3) Pre-upsetting and bundle tail: Put the workpiece B obtained in step (2) into the mold of the second station cold heading machine, pre-upset the positioning boss, and squeeze out the tail from one end of the workpiece B to obtain the workpiece C;

[0022] (4) ...

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Abstract

The invention discloses process for manufacturing quincuncial dowel screws. The process mainly includes steps: (1) cutting; (2), double chamfering; (3) preliminary heading and tail binding; (4) quincunx binding and forming; (5) thread rolling; (6) heat treatment; and (7) surface treatment. The process for manufacturing quincuncial dowel screws has the advantages that an integral processing procedure is divided into a plurality of working procedures, a blank is in cold heading processing to form a product, generated waste materials are avoided in the processing procedure, processing speed and efficiency are high, cost is effectively controlled, labor intensity of personnel is reduced, and the quality of the product can be reliably guaranteed.

Description

technical field [0001] The invention relates to a screw manufacturing process, in particular to a torx-shaped double-ended screw manufacturing process. Background technique [0002] Torx stud screw is a fastener used to connect two different parts together, including stud 1, self-tapping screw shaft 2, and a positioning protrusion between stud 1 and self-tapping screw shaft 2 Platform 3, the radial dimension of the positioning boss 3 is greater than the diameter of the stud 1 and the self-tapping screw shaft 2, the other end of the stud 1 is provided with a quincunx-shaped tail 4, and the other end of the self-tapping screw 2 is provided with a round chamfer 5, First, the self-tapping screw 2 is tapped into a part, and the stud 1 exposed at the other end is used for other connecting parts, and the positioning boss 3 is used for positioning and length determination. The operation is very convenient and fast, and has been widely used. application. At present, the processing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21J5/08
Inventor 饶陈伟
Owner 苏州新凌电炉有限公司
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