Thread roll-forming process for large-specification bolt

A roll forming, large-scale technology, applied in the direction of threaded products, other household appliances, household appliances, etc., can solve the problem of large-scale screw thread and other problems

Inactive Publication Date: 2016-12-14
JULI GASOLINEEUM MACHINERY MFG XIANYANG
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the existing method of rolling large-size threads is prone to chaotic fastening, the present invention provides a thread rolling forming process for large-size bolts
The present invention adopts a very shallow guide groove before the billet rolling (the requirements for the profile angle and half angle are not high), and then roll form...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Thread roll-forming process for large-specification bolt
  • Thread roll-forming process for large-specification bolt
  • Thread roll-forming process for large-specification bolt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In order to overcome the problems that the existing methods are difficult to roll large-size threads and are prone to disorderly fastening, the present invention provides a method such as image 3 The thread rolling forming process of the large-size bolts shown in the present invention adopts a very shallow guide groove (the requirements for the tooth angle and half angle are not high) before the blank rolling, and then roll forming, guiding The groove is machined according to the pitch of the bolt (corresponding to the helix angle of the corresponding specification), so that in the subsequent rolling process, the cusp of the roller is always limited in the guide groove of the bolt, so that there will be no random buckling phenomenon, which solves the problem This problem, and this method is simple and feasible.

[0027] 3. The thread rolling forming process of large-size bolts, the specific steps are:

[0028] S1 blank preparation: carve a spiral guide groove on the s...

Embodiment 2

[0035] Based on Embodiment 1, in this embodiment, in the step S1, a spiral guide groove is formed on the surface of the large-size bolt to be rolled, and the guide groove is a triangular guide groove, and the guide groove is according to The thread pitch of the bolt is machined.

[0036] The included angle of the triangular guide groove is 60°.

[0037] The thread rolling machine selected in the step S2 is a Z28-60 thread rolling machine.

[0038] The maximum thread rolling diameter of the Z28-60 thread rolling machine is M68.

[0039] In the step S2, the positions of the two thread rolling wheels are adjusted before the bolt rolling, so that the cusps of the two thread rolling wheels are just in the triangular guide groove of the bolt blank, and the position of the two thread rolling wheels is adjusted to extend the axis locked to a fixed position.

[0040] For equipment adjustment, choose Z28-60 thread rolling machine, install a thread rolling wheel on the fixed shaft and...

Embodiment 3

[0044] Based on the above two embodiments, in this embodiment, M76-M125 bolts are used for experiments.

[0045] The above simple, economical and efficient method is used to roll large-size threads, which solves the problem of large-size bolt thread roll forming. At present, this method has been applied to the trial production of M76-M125 bolts. From the perspective of effect, this method is simple and easy to implement, meets the quality requirements, and has high production efficiency.

[0046] The thread rolling forming process of the large-size bolt provided by the present invention can roll out the large-size screw thread with the above method, but in ensuring the accuracy of the thread, there are two problems to be discussed and tested (see image 3 , d1 in the figure is the diameter of the front billet of the triangular guide groove of the bolt car, p is the pitch of the bolt, and t is the depth of the triangular guide groove):

[0047] (1) Reasonable triangular guide...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a thread roll-forming process for a large-specification bolt, comprising the steps of S1, blank preparation: turning a guide slot in the surface of the large-specification bolt to be rolled; S2, equipment regulation: selecting thread roller equipment, respectively mounting a thread rolling wheel on each of a fixed shaft and a feed shaft of a thread roller, and then, fixing and locking the thread rolling wheels in the axial direction; and S3, thread rolling: placing the bolt in which the guide slot is turned in the step S1 between the two thread rolling wheels of the thread roller selected in the step S2, enabling the bolt to be close to the thread rolling wheel of the fixed shaft, and leaning the guide slot of the bolt into a cusp of the thread rolling wheel of the fixed shaft to begin to roll. The guide slot is turned in the bolt in the thread roll-forming process, the guide slot of the bolt is leaned into the cusp of the thread rolling wheel of the fixed shaft, and thus, a cusp of the thread rolling wheel of the feed shaft is kept to just fall into the corresponding guide slot of the bolt when the feed shaft feeds. The cusps of the rolling wheels are always limited in the guide slot of the bolt in the subsequent thread rolling, so that no winding phenomena can appear, and a required thread is rolled.

Description

technical field [0001] The invention relates to a thread rolling forming process for large-size bolts. Background technique [0002] There are two methods of thread processing: cutting forming and rolling forming. Due to the advantages of high production efficiency, good thread accuracy, material saving, and good metal flow at the bottom of the thread, this thread processing method has been widely used in bolt manufacturing. industry. [0003] We know that when thread rolling is formed, a pair of thread rolling wheels with the same helix angle as the bolt (thread) should be selected first. In this way, during the thread rolling process, the thread rolling wheel rotates and drives the blank to rotate under the action of radial pressure, and the indentation can be squeezed out on the surface of the blank by the cusp of the thread rolling wheel. When the blank and the roller are pure rolling , the helix angle of the indentation on the surface of the blank is the same as the h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B21H3/04
CPCB21H3/04
Inventor 史增乐侯维娟史育娟焦小明
Owner JULI GASOLINEEUM MACHINERY MFG XIANYANG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap