Method for welding high-strength steel hydraulic support member
A technology of hydraulic support and high-strength steel, which is applied in the welding of hydraulic support structural parts and welding of high-strength steel hydraulic support components. It can solve the problems of poor welding environment, inability to weld, cold cracks and other problems of welders, and improve the quality of welders. Effect of operating environment, shortening production cycle, and reducing cracks
Inactive Publication Date: 2013-08-07
CHONGQING DAJIANG IND
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] (1) The overall preheating before welding causes the welding environment of the welder to be poor or unable to weld;
[0005] (2) Equal or super-strong matching of welding materials is likely to cause cold cracks;
[0006] (3) It takes a long time for the overall stress relief and tempering after welding
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0027] A welding method of a high-strength steel hydraulic support member according to the present invention, the steps are as follows:
[0028] The first step is to determine the starting point of welding: select the middle position of the welding seam of the high-strength steel hydraulic support member as the starting point of welding;
[0029] The second step, preheating at the starting point of welding: use oxyacetylene heating method, the preheating temperature is ≥150°C, <180°C; the preheating is controlled within the range of 300-500mm on both sides of the starting point of welding, and attention should not be affected during preheating properties of the parent material;
[0030] The third step is to select the welding material: select the welding material according to the low-strength matching principle, that is, the strength of the welding mat...
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
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a method for welding a high-strength steel hydraulic support member. The method comprises the following steps of: 1, determining a welding starting point; 2, pre-heating the welding starting point; 3, selecting welding materials; 4, determining welding process parameters, namely implementing an arc welding method, and welding under the protection of mixed gas of 80 volume percent of Ar and 20 volume percent of CO2, wherein the welding current is between 320 and 350A; the arc voltage is between 30 and 35V; the gas flow is 25L / min; and a phi1.6mm solid core welding wire is adopted, and the dry elongation of the welding wire is between 15 and 25mm; 5, welding; and 6, destressing. According to the method, the welding sequence is reasonable, a welded part is fixed by a rigid fixing method, symmetrical welding is implemented in the welding process, and welding is implemented from the center to two sides, so that cracks are reduced effectively, an operation environment for welders is improved, production efficiency is improved, a production cycle is shortened, and production cost is reduced.
Description
technical field [0001] The invention relates to high-strength steel welding technology, in particular to a welding method for high-strength steel hydraulic support components, which is mainly used for welding hydraulic support structural parts. Background technique [0002] The hydraulic support is the support facility of the mine. At present, the high-end hydraulic support adopts low-alloy high-strength steel (such as Q690, Q890, etc.) with a tensile strength of 800-1000Mpa. The weldability of this material is poor, mainly manifested as a large hardening tendency, easy to produce cold cracks, difficult to eliminate welding residual stress, poor surface forming, etc. However, when this material is used in the production of hydraulic supports, the resulting difficulties in welding production become more and more obvious. The main performance is that the welding workload is very large, the welding stress and deformation are difficult to control, the welding residual stress is...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16
Inventor 麦筱蕙周鹏杨中建涂永平胡红斌张伟李茂华
Owner CHONGQING DAJIANG IND