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Adjustable welding torch for rotating electrical arc welding and adjusting method thereof

A technology of rotating electric arc and welding torch, which is applied in the direction of welding accessories, electrode characteristics, electrode support devices, etc. It can solve the problems of high cost of consumable parts, low adjustment accuracy, high implementation cost, etc., and achieve simplified mechanism design, reduced welding cost, The effect of low implementation cost

Active Publication Date: 2015-04-08
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: it is necessary to adjust the radius of rotation of the arc by replacing the contact tips with different curvatures. Because the contact tip is short and is a special vulnerable part, the production of the contact tip is difficult, the cost is high, and the adjustment accuracy of the arc rotation radius is low. , poor engineering practicability
Its disadvantages are: The contact tip is fixedly connected to the conductive rod by rotating the connection head, and the structure is relatively complicated;A gas shield with an opening size matching the rotation range of the lower end of the contact tip is used to cover the rotary connector and the contact tip. The gas shield is difficult to penetrate into the slope It is not suitable for narrow gap welding of large and thick plates; adjusts the rotary scanning range by replacing the rotary joint with different inclined end faces, The operation is more cumbersome and the implementation cost is higher
Its disadvantage is that it is necessary to adjust the arc rotation range (or rotation radius) by replacing the contact tip with different eccentricity. The eccentric contact tip is a consumable part and requires special production, which leads to a significant increase in the cost of the rotary arc welding and cannot be realized. Precise adjustment of arc rotation radius
[0006] To sum up, the existing rotary arc welding torch has complex structure, difficult manufacture, inconvenient adjustment of arc rotation radius and low adjustment accuracy, and consumes parts cost High, the scope of application is not wide and other shortcomings

Method used

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  • Adjustable welding torch for rotating electrical arc welding and adjusting method thereof
  • Adjustable welding torch for rotating electrical arc welding and adjusting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] For arc rotation radius R=R min =0.25mm, optional bending conductive rod 3 bending angle β=β min = 0.2° torch deployment situation.

[0028] Allocation method: according to the welding process requirements, first select the arc rotation radius R=R min =0.25mm and straight contact tip 2 minimum length L 2min =20mm, and make the welding wire dry stretch L 3 Take the value within the range of 15~25mm; then according to R﹥(L 1 +L 2min +L 3 ) principle of sinβ, with bending angle β=β min =0.2° and the bending length is L 1 The bending conductive rod 3, determine the rough adjustment value d of the arc rotation radius R 1 = L 1 sin β and a specific value d 3 = L 3 sinβ; finally according to formula d 2 =R-d 1 -d 3 Calculate the actual fine-tuning value d of the arc rotation radius R 2 After that, according to the formula L 2 =D 2 / sinβ Calculate the length L of the straight contact tip 2 2 , with a length of L 2 The straight contact tip 2.

[0029] Deplo...

Embodiment 2

[0032] The basic deployment method is the same as that in Example 1, the difference is: this example is aimed at arc rotation radius R=R max =4.0mm, optional bending angle β= β max = 2.9 ° torch deployment situation.

[0033] Deployment result: when taking L 3 =15mm, according to R﹥(L 1 +20+L 3 ) principle of sinβ, L 1 Should be less than 44.1mm, if L 1 =15mm, calculated: the specific value d of the radius of arc rotation 3 =0.759mm, rough adjustment value d 1 =0.759mm, fine-tuning value d 2 =R-d 1 -d 3 =2.482mm, then choose the length L of the straight contact tip 2 2 =49.1mm; similarly, when taking L 3 =20mm, L 1 Should be less than 39.1mm, if L 1 =39mm, calculated: the specific value d of the radius of arc rotation 3 =1.012mm, rough adjustment value d 1 =1.973mm, fine-tuning value d 2 =R-d 1 -d 3 =1.015mm, then choose the length L of the straight contact tip 2 2 =20.1mm; when L is taken 3 =25mm, L 1 Should be less than 34.1mm, if L 1 =34mm, calculated:...

Embodiment 3

[0036]The basic deployment method is the same as that of Embodiment 1, except that this embodiment is aimed at the welding torch deployment situation when the arc rotation radius R=2.7mm and the optional bending angle β=1.55°.

[0037] Deployment result: when taking L 3 =20mm, according to R﹥(L 1 +20+L 3 ) principle of sinβ, L 1 Should be less than 59.8mm, if L 1 =15mm, calculated: the specific value d of the radius of arc rotation 3 =0.541mm, rough adjustment value d 1 =0.406mm, fine-tuning value d 2 =R-d 1 -d 3 =1.753mm, then the optional straight contact tip 2 length L 2 =64.8mm; similarly, when taking L 3 =20mm and L 1 =35mm, calculated: the specific value d of the arc rotation radius 3 =0.541mm, rough adjustment value d 1 =0.947mm, fine-tuning value d 2 =R-d 1 -d 3 = 1.212mm, then the optional straight contact tip 2 length L 2 =44.8mm; when L is taken 3 =20mm and L 1 =59mm, calculated: the specific value d of the arc rotation radius 3 =0.541mm, rough ad...

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Abstract

The invention discloses an adjustable welding torch for rotating electrical arc welding and an adjusting method thereof. A bent conducting rod comprises a vertical section and a bent section, and a bent angle Beta of the bent conducting rod is formed between a central axis of the bent section and a central axis of the welding torch; a rotating radius of an electrical arc is set as R, an elongation length of a welding wire is set as L3, the minimum length of a straight contact nozzle is set as L2min, and according to the principle that R>(L1+L2min+L3)sinBeta, the bent conducting rod with the bent angle Beta and the bending length of L1 is selected, and a rough adjusting value and a specific value of the R are confirmed; and an actual fine adjusting value d2 of the R is calculated, the L2 is calculated, and the straight contact nozzle at the length of L2 is selected to realize fine adjusting of the R. The rotating radius of the electrical arc is adjusted roughly and finely by selecting the bent conducting rod and the straight contact nozzle, so that the electrical arc rotating radius is large in adjusting range and high in adjusting precision; and the bent conducting rod is long in service life, and only the straight contact nozzle needs to be replaced normally due to consumption, so that welding cost for a rotating electrical arc is remarkably reduced.

Description

technical field [0001] The invention belongs to the field of welding technology and relates to a welding torch, in particular to an adjustable welding torch for rotary arc welding and an adjusting method thereof. Background technique [0002] During gas-shielded arc welding, the arc is rotated with a certain radius through the welding torch, or swings or shakes with a certain range, which can adjust the distribution of arc heat in the welding groove, and use the arc force to increase the groove side. The purpose of wall penetration and improvement of weld formation. [0003] Existing welding torches for rotary arc welding include: eccentric nozzle type, curved conductive tip type, and eccentric conductive tip type. For example, the patent with the publication number JP1495487C and the name "Narrow Gap Arc Welding Method" discloses an eccentric nozzle type and curved contact tip type rotary arc welding torch for narrow gap welding. The straight nozzle that enters the bevel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/28B23K9/32
Inventor 王加友陈淑君朱杰王彪
Owner JIANGSU UNIV OF SCI & TECH