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Processing technology of threaded bolt with taper

A processing technology and thread technology, applied in the field of automotive fasteners, can solve problems such as the problem of sliding teeth, and achieve the effect of solving the problem of sliding teeth

Active Publication Date: 2016-08-24
宁波敏达汽车科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a processing technology for tapered threaded bolts in order to solve the problem of slipping teeth caused in the assembly process

Method used

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  • Processing technology of threaded bolt with taper
  • Processing technology of threaded bolt with taper
  • Processing technology of threaded bolt with taper

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] The processing technology of threaded bolts with taper, the specific steps are as follows:

[0020] Step 1, such as figure 1 As shown, the threaded bolt with taper is processed to process the tooth plate. The tapered threaded bolt processing tooth plate includes dynamic and static thread rolling plates; the inside of the dynamic and static thread rolling plates are processed with a plurality of cooperating thread rolling protrusions 1 arranged side by side; three guiding thread thread rolling protrusions 2 are arranged side by side at the most The bottom of the matching thread rolling convex strip at the bottom; the included angle between the axes of the cooperating thread rolling convex strip 1 and the guide thread rolling convex strip 2 and the horizontal line is 20°; all the concave grooves formed on the side of the matching thread rolling ...

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Abstract

The invention discloses a machining technology for a bolt with taper threads. When an ordinary bolt and nut threads are screwed without alignment, screw loosing is likely to happen, and seriously, the bolt is beaten damaged. The machining technology comprises the steps that a machining thread plate of the bolt with the taper thread is machined and comprises a movable thread rolling plate and a fixed thread rolling plate; matched thread rolling protruding strips are machined on the inner side of the movable thread rolling plate and the inner side of the fixed thread rolling plate; guiding thread rolling protruding strips are arranged at the bottom of the bottommost matched thread rolling protruding strip; a semi-finished bolt is obtained through cold heading; the semi-finished bolt enters a gap between the movable thread rolling plate and the fixed thread rolling plate for thread rolling through a thread rolling rail after vibrating through a feeding vibration disc; matched threads are formed on a matched cylinder face of a bolt rod through rolling of the matched thread rolling protruding strips of the movable thread rolling plate and the fixed thread rolling plate, and guiding threads are formed on a guiding conical face of the bolt rod through rolling of the guiding thread rolling protruding strips of the movable thread rolling plate and the fixed thread rolling plate; and thermal treatment and surface treatment are carried out on the bolt on which thread rolling is carried out. A conical thread is formed through thread plate extrusion and plays a guiding role in butt joint of the bolt and the nut, and the problem of screw loosing is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of vehicle fasteners, and relates to vehicle bolts, in particular to a processing technology for tapered threaded bolts. Background technique [0002] Ordinary structural bolts, in the process of aligning with the nuts, if they are not aligned with the nut threads, they are easy to slip when tightening directly with a torque gun. In some serious cases, the bolts will be broken and affect the car Assembly efficiency of the production line. Contents of the invention [0003] The purpose of the present invention is to propose a processing technology for threaded bolts with taper in order to solve the problem of slipping teeth caused in the assembly process. [0004] Concrete steps of the present invention are as follows: [0005] Step 1, process the tooth plate with tapered threaded bolts. The tooth plate for processing threaded bolts with taper includes dynamic and static thread rolling plates; the inner ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B21H3/06
CPCB21H3/06B23P15/00F16B35/00
Inventor 林玮信
Owner 宁波敏达汽车科技股份有限公司
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