Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Welding method of bridge steel structure

A welding method and steel structure technology, applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of low yield, high production cost, unreasonable selection of process parameters, etc., and achieve the improvement of tensile strength and yield Strength, prevent hot cracks, avoid intergranular corrosion

Inactive Publication Date: 2018-03-23
新疆天山恒合能源装备有限责任公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing steel structure welding process has unreasonable process arrangement, numerous processes, unreasonable selection of process parameters, unreasonable collocation of process parameters, and high requirements for operator experience, resulting in high production costs, low product quality, and poor quality of finished products. rate is not high

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
  • Welding method of bridge steel structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1. Make a groove on the workpiece to be welded. The groove is W-shaped, the groove angle is 50°, the gap between the grooves of the two parts to be welded is 2 mm and the groove is pretreated:

[0022] First use dilute hydrochloric acid to wipe the surface of the groove welding part, then use 400 mesh sponge sandpaper to polish the groove welding part for 1 minute, then use 800 mesh dry sandpaper to polish the groove welding part for 40 seconds, and finally use dilute hydrochloric acid to polish the groove welding part again. Wipe the surface of the welding part.

[0023] Brushing thickness is the welding agent of 0.04mm at groove place then, and described welding agent is made up of the component of following parts by weight: the ZrO of 3 parts by weight 2 , 10 parts by weight of MgO, 12 parts by weight of TiO 2 , 20 parts by weight of Fe 3 o 4 , 3 parts by weight of NaF, 5 parts by weight of CaF 2 , 6 parts by weight of CrCl 3 and 10 parts by weight of Al po...

Embodiment 2

[0030] Step 1. Make a groove on the workpiece to be welded. The groove is W-shaped, the groove angle is 60°, the gap between the grooves of the two pieces to be welded is 2.5mm and the groove is pretreated:

[0031] First use dilute hydrochloric acid to wipe the surface of the groove welding part, then use 500 mesh sponge sandpaper to polish the groove welding part for 1.5 minutes, then use 900 mesh dry sandpaper to polish the groove welding part for 50 seconds, and finally use dilute hydrochloric acid to Wipe the surface of the groove welding part.

[0032] Brushing thickness is the welding agent of 0.06mm at groove place then, and described welding agent is made up of the component of following parts by weight: the ZrO of 6 parts by weight 2 , 12 parts by weight of MgO, 13 parts by weight of TiO 2 , 24 parts by weight of Fe 3 o 4 , 4 parts by weight of NaF, 6 parts by weight of CaF 2 , 7 parts by weight of CrCl 3 and 13 parts by weight of Al powder;

[0033] Step 2. Pr...

Embodiment 3

[0039] Step 1. Make a groove on the workpiece to be welded. The groove is W-shaped, the groove angle is 70°, the gap between the grooves of the two pieces to be welded is 3mm and the groove is pretreated:

[0040] First use dilute hydrochloric acid to wipe the surface of the groove welding part, then use 600 mesh sponge sandpaper to polish the groove welding part for 2 minutes, then use 1000 mesh dry sandpaper to polish the groove welding part for 60 seconds, and finally use dilute hydrochloric acid to polish the groove welding part again. Wipe the surface of the welding part.

[0041] Brushing thickness is the welding agent of 0.08mm at groove place then, and described welding agent is made up of the component of following parts by weight: the ZrO of 8 parts by weight 2 , 14 parts by weight of MgO, 15 parts by weight of TiO 2 , 28 parts by weight of Fe 3 o 4 , 5 parts by weight of NaF, 8 parts by weight of CaF 2 , 9 parts by weight of CrCl 3 and 16 parts by weight of Al ...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a welding method of a bridge steel structure. The welding method comprises the following steps that 1, a slope opening is manufactured, and a welding agent being 0.04-0.08 mm issmeared at the slope opening, wherein the welding agent is prepared from, by weight, 3-8 parts of ZrO2, 10-14 parts of MgO, 12-15 parts of TiO2, 20-28 parts of Fe3O4, 3-5 parts of NaF, 5-8 parts of CaF2, 6-9 parts of CrCl3 and 10-16 parts of Al powder; 2, the slope opening and the two ends of the slope opening are preheated; and 3, a to-be-welded workpiece which is preheated is subjected to butting and welded, the welding height in the first welding process is half of the welding height of the to-be-welded workpiece, and the welding heights in the second welding process and the third weldingprocess are both one quarter of the welding height of the to-be-welded workpiece. The welding method of the bridge steel structure can obviously improve the welding mechanical properties.

Description

technical field [0001] The invention relates to the field of welding technology. More specifically, the present invention relates to a welding method for bridge steel structures. Background technique [0002] As a main connection method for building steel structures, welding plays a more important role in the construction of steel structures in my country with the continuous emergence of new technologies, new materials, new equipment, and new processes. According to statistics, more than 50% of the steel needs to be welded before being put into use. Therefore, the improvement of welding level is the key to realize the rapid development of steel structure technology and ensure the construction quality of building steel structure. When welding, manual arc welding, CO2 gas shielded automatic and semi-automatic welding and submerged arc automatic welding are usually used alone, which are prone to two problems of welding deformation and welding cracks. Due to the advantages of...

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): B23K31/02B23K35/30B23K35/36B23K35/365
CPCB23K31/022B23K35/3086B23K35/3602B23K35/3608B23K35/365
Inventor 刘革陈云汪五十四拉海辉罗玉森潘金龙
Owner 新疆天山恒合能源装备有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com