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Double-wire vertical welding method of high-strength steel component by robot

A welding method and high-strength steel technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve rare problems, achieve the effect of reducing width, ensuring welding quality, and avoiding molten pool flow

Active Publication Date: 2018-06-29
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, many scholars have done a lot of research on twin-wire flat welding, but few achievements have been made on vertical vertical welding.

Method used

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  • Double-wire vertical welding method of high-strength steel component by robot
  • Double-wire vertical welding method of high-strength steel component by robot
  • Double-wire vertical welding method of high-strength steel component by robot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, the double-wire pulse GMAW vertical welding method for high-strength steel components is carried out in the following steps:

[0030] The workpiece to be welded is milled to produce an X-shaped welding groove, the groove angle is 60°, and the blunt edge is 2-4mm. The groove and the 30mm range on both sides of the inner and outer walls are cleaned until the metallic luster is exposed. The piece to be welded is a high-strength steel member, and its mass percentage composition is: C: 0.09%-0.14%, Si: 0.17%-0.37%, Mn: 0.20%-0.60%, S: ≤0.030%, P: ≤0.035%, Cr: 0.09%-1.20%, Ni: 2.60%-3.00%, Mo: 0.20%-0.27%, V: 0.04%-0.10%, the type of welding wire used is wm960, and the diameter is 1.2mm. Fix the workpiece to be welded by spot welding with GMAW, and the gap between the two plates is 1-2mm. Place the parts to be welded vertically and fix them with clamps. Use the double-wire pulse GMAW method to weld the bottom layer, filling layer and cover layer. The shi...

Embodiment 2

[0033] In this embodiment, the double-wire pulse GMAW vertical welding method for high-strength steel components is carried out in the following steps:

[0034] The workpiece to be welded is milled to produce an X-shaped welding groove, the groove angle is 60°, and the blunt edge is 2-4mm. The groove and the 30mm range on both sides of the inner and outer walls are cleaned until the metallic luster is exposed. The high-strength steel member to be welded is composed of: C: 0.09%-0.14%, Si: 0.17%-0.37%, Mn: 0.20%-0.60%, S: ≤0.030%, P: ≤0.035%, Cr : 0.09%-1.20%, Ni: 2.60%-3.00%, Mo: 0.20%-0.27%, V: 0.04%-0.10%, the type of welding wire used is carbon steel wire with a diameter of 1.2mm. Fix the workpiece to be welded by spot welding with GMAW, and the gap between the two plates is 1-2mm. Place the parts to be welded vertically and fix them with clamps. Use the double-wire pulse GMAW method to weld the bottom layer, filling layer and cover layer. The shielding gas used is a mixe...

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Abstract

The invention discloses a double-wire vertical welding method of a high-strength steel component by a robot. The method particularly includes the steps: firstly, machining a welding groove into an X-shaped groove; secondly, welding a base layer, a filling layer and a covering layer of a part to be welded by the aid of a double-wire pulsed gas metal arc welding method after the part to be welded isfixed in a spot welding manner. Two welding wires are arranged forwards and backwards along a welding direction when the base layer is welded, and the welding wires are parallelly arranged along thewelding direction when the filling layer and the covering layer are welded. According to the method, standards of qualified welding seams such as arc voltage and current are provided, the qualified welding seams are good in penetration degree and can be acquired at low cost by the method, molten pools of the qualified welding seams cannot drip, and welding efficiency can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of plate welding of high-strength steel components, in particular to a welding method for vertically welding high-strength steel components with a robot double wire. Background technique [0002] Welding is an important key technology in the shipbuilding industry. Welding man-hours and welding costs account for 30%-50% of hull construction man-hours and costs. Welding quality and efficiency directly affect the quality, cycle and cost of shipbuilding. Due to the advantages of significantly increasing welding speed and welding deposition rate, dual-wire pulsed GMAW has become the most widely used welding process in the field of high-efficiency welding, and it is also one of the high-efficiency welding processes that are currently being promoted in various fields. [0003] Lu Hanzhong et al. Effect of double wire spacing on low temperature toughness of Q690E high-strength steel double wire MAG welding[J]. Shipb...

Claims

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Application Information

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IPC IPC(8): B23K9/173B23K9/12B23K9/133
CPCB23K9/126B23K9/133B23K9/173
Inventor 王克鸿朱嘉宇周琦李化高琼周晓晓张伟黄勇方吉米李聪吴统立
Owner NANJING UNIV OF SCI & TECH
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