Friction Welding Method for Standard Section Web Rod of Tower Crane

A friction welding, standard section technology, applied in welding equipment, non-electric welding equipment, metal processing equipment and other directions, can solve the problems of unsatisfactory product appearance quality, low production efficiency, difficult processing, etc., to achieve beautiful molding, stable and reliable quality , The effect of improving the degree of welding automation

Active Publication Date: 2017-01-04
SICHUAN CONSTR MACHINERY GRP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need to mechanically process the steel pipe and the sealing plates at both ends for many times, there are disadvantages such as difficult processing, low production efficiency and high production cost in actual production.
And because the connecting seam is welded by hand, the appearance quality of the product is not ideal

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
  • Friction Welding Method for Standard Section Web Rod of Tower Crane
  • Friction Welding Method for Standard Section Web Rod of Tower Crane
  • Friction Welding Method for Standard Section Web Rod of Tower Crane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The embodiments of the present invention will be described below by taking Φ76X5, Φ89X5, and Φ108X8 steel pipes as examples.

[0024] The standard section webs of the tower crane are welded by the steel pipe 1 and the end plate 2, and the friction welding method includes the following steps:

[0025] A. Preparation before welding: Saw the steel pipe 1 into shape. For the steel pipe 1 that needs to be welded at both ends, it is necessary to consider the amount of friction and deformation at both ends of the steel pipe 1 before sawing the shape. No oil, rust and other dirt; the end plate 2 is cut and blanked by means of a CNC flame cutting machine, and the side of the end plate 2 that needs friction welding is sandblasted or shot blasted to remove oil, rust and other impurities. The residual amount of dirt on the surface of the steel plate shall not exceed 5%, especially the strict decontamination on the friction weld ring of the end plate.

[0026] B. Clamp and fix the ...

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 discloses a friction welding method for a standard section web of a tower crane. The web is welded by a steel pipe and an end plate. The friction heating process is divided into two stages of primary friction and secondary friction, and the two stages rotate the main shaft The rotation speeds of the first and second frictions are equal, the first-order friction pressure and friction time are fixed; the second-order friction pressure is greater than the first-order friction pressure and fixed, when the total friction deformation of the first-order friction and the second-order friction reaches the preset value, the second-stage friction heating ends; After the stage friction is over, the rotating fixture is braked, and after the main shaft holding the end plate stops rotating, the moving fixture holding the steel pipe is fed for upsetting, and the friction welding process is completed after upsetting and maintaining pressure. The invention omits the process of "grooving and turning the boss" in the existing processing flow; the rotating speed in the friction heating stage is fixed, which is easy to control; the amount of friction deformation can be controlled, which improves the stability of the welding length of the web; improves the production efficiency and reduce production costs.

Description

technical field [0001] The invention relates to a friction welding technology, in particular to a friction welding method for a standard section web bar of a tower crane. Background technique [0002] Friction welding is a metal solid-phase hot-press welding method. The relative friction between the two surfaces continues until sufficient heat is generated, then the friction is stopped, and the two parts are forged together under the force of the upsetting pressure to form Welding is a high-quality, high-efficiency, non-toxic and harmless welding method. [0003] The standard section is an important part of the tower crane. The existing standard section is mainly a frame structure composed of crossbeams and vertical beams. In order to further ensure the firmness of the standard section, webs are welded between the crossbeams. As an important structural component of the standard section of the tower crane, the web must frequently withstand the tensile and compressive stress...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
Inventor 熊小平刘国荣侯晓芝丁建新
Owner SICHUAN CONSTR MACHINERY GRP
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