CN203875460U - Special argon arc welding machine for circular pipes - Google Patents

Abstract

The utility model relates to a special argon arc welding machine for round pipes, which belongs to the technical field of welding equipment. It solves the defects of uneven quality of welding seam, poor sealing and continuity of welding seam in the prior art when manually welding round pipe joints. It mainly includes argon gas cylinders, processing devices, Electric control box, wire feeder and flexible welding gun, the external cable of the electric control box is drawn out by the aviation plug-in female head; A controlled lifting platform; a thrust bearing and a helical gear plate driven by an AC motor through a worm drive shaft are installed above the lifting platform, and a three-jaw chuck and an air motor are installed below; a welding torch clamp is arranged above the helical gear plate, and An infrared sensor A and an infrared sensor B are correspondingly arranged on the welding torch clamp and the support. The utility model is mainly used for welding between round pipes and flanges.

Description

Argon arc welding machine for round pipe

technical field

The utility model relates to an argon arc welding machine, in particular to a special argon arc welding machine for round pipes, which belongs to the technical field of welding equipment.

Background technique

In the matching welding of metal pipes and flanges, welding workers generally use electric welding machines to weld the matched pipes and flanges. Argon arc welding is mainly used. The main engine generates high-frequency electricity, and the welding wire at the head of the welding torch contacts the weldment. Due to the high-frequency current forms a high-frequency magnetic field, the weldment and welding wire heat and melt rapidly, achieving the purpose of welding the pipe fittings. At the same time, the head of the welding torch sprays argon gas. The main function of argon gas is to isolate the air, protect the solder joints from reacting with oxygen and other gas impurities in the air during the welding process, and improve the welding quality of the weld. However, the size of metal joints and flanges of conventional circular cylindrical hose automatic welding is often different, that is, the diameter and height are different, so it is necessary to install the flange along the vertical pipeline axis so that the axes of the two weldments are collinear. The corresponding workpiece is fixed at the relative position. At this time, the welder holds the welding torch to perform spot welding on the weld seam of the welded part to realize the preliminary fixation of the relative position of the two welded parts. After that, the welder fills up the weld seam at other places at a nearly uniform speed. The welder then places the welded pipe vertically, and then fills up the internal weld seam. However, the disadvantages of manual welding with hand-held welding torches are:

First of all, spot welding is used for welding, and it is difficult for welders to ensure that the size of the solder joints is the same, the continuity of the weld and the quality of the weld.

Secondly, the weldment is a workpiece with a rotating surface. The welder must ensure a uniform welding speed and at the same time master the welding time. If the time is too long, the weldment will be burned out. If the time is too short, the sealing of the weld seam is difficult to guarantee.

Utility model content

The utility model provides a special argon arc welding machine for automatic welding of round pipes, aiming at the problems of uneven welding seam quality, poor sealing performance and continuity of welding seams in the prior art when manually welding round pipe joints. .

The technical scheme that the utility model solves the problems of the technologies described above is as follows:

A special argon arc welding machine for round pipes, including an argon gas bottle installed in a working relationship, a processing device, an electric control box, a wire feeder and a flexible welding torch, and the external cable of the electric control box is led out from the aviation plug-in female head; The processing device includes a support with a hydraulic lifting cylinder, and a lifting platform controlled by the hydraulic lifting cylinder is installed horizontally on the support; a thrust bearing and a helical gear plate driven by an AC motor through a worm drive shaft are installed above the lifting platform. , a three-jaw chuck and an air motor are installed below; a welding torch fixture is arranged above the helical gear plate, and an infrared sensor A and an infrared sensor B are correspondingly arranged on the welding torch fixture and the bracket.

Further, the welding torch clamp is installed and fixed by left and right degree of freedom adjustment nuts and up and down degree of freedom adjustment nuts.

Compared with the prior art, the utility model has the beneficial effects that: the position of the circular tube of the weldment can be fixed, and good cooperation between the two weldments can be ensured; for different pipeline heights, the welding torch can be adjusted vertically on the ground; The rotation of the welding torch adopts an adjustable mechanism for axial and radial degrees of freedom; the lifting of the welding torch mechanism is directly combined with hydraulic transmission and chain transmission; it ensures that the welding wire does not circle or break during the welding process. Realized the replacement of manual welding by machinery, greatly improving the quality and efficiency of welding.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of processing device of the present utility model;

Fig. 3 is a schematic diagram of the installation relationship between the AC motor of the present invention and the helical gear disc;

Fig. 4 is a schematic structural view of the welding torch clamp of the present invention.

In the figure, 1. Argon cylinder; 2. Processing device; 3. Electric control box; 4. Wire feeder; AC motor; 24. Hydraulic lifting cylinder; 25. Infrared sensor B; 26. Welding gun fixture; 27. Infrared sensor A; 28. Helical gear plate; 29. Thrust bearing; 30. Lifting platform; 31. Three-jaw chuck ; 32, aviation plug-in male head; 33, worm drive shaft; 34, adjusting nut for up and down degrees of freedom; 35, adjusting nut for left and right degrees of freedom.

Detailed ways

Below in conjunction with accompanying drawing, the utility model will be further described:

A special argon arc welding machine for round pipes, including an argon gas bottle 1 installed in a working relationship, a processing device 2, an electric control box 3, a wire feeder 4 and a flexible welding torch 6, and the external cable of the electric control box 3 is provided by aviation The plug-in female head 5 is drawn out; the processing device 2 includes a support 21 with a hydraulic lifting cylinder 24, and a lifting platform 30 controlled by the hydraulic lifting cylinder 24 is installed horizontally on the support 21; a thrust is installed above the lifting platform 30 Bearing 29 and helical gear plate 28 driven by AC motor 23 through worm drive shaft 33, three-jaw chuck 31 and air motor 22 are installed below; described helical gear plate 28 is provided with welding gun clamp 26, and welding gun clamp 26 and support 21 is correspondingly provided with an infrared sensor A 27 and an infrared sensor B 25; the welding torch clamp 26 is installed and fixed by a left and right degree of freedom adjustment nut 35 and an up and down degree of freedom adjustment nut 34.

When the utility model is made, the overall frame of the welding machine is welded with heavier materials (I-beams), and the support 21 adopts steel pipes (or I-beams) as supports; the three-jaw chuck 31 provided below the lifting platform 30 can realize The support of the weldment; the three-jaw chuck 31, the thrust bearing 29, and the helical gear plate 28 must control the coaxiality to ensure the quality of the weld; the electric control box 3 is controlled by PLC.

When the utility model is working, press the start button, the staff will place a weldment in the upper three-jaw chuck 31, and the program in the PLC controls the three jaws of the three-jaw chuck 31 to firmly fix the workpiece, and the welding The flange plate of the part and the pipeline realize the clearance fit, so that the relative position of the two weldments is fixed; by changing the relative position of the welding torch clamp 26, the head of the welding torch contacts the weld, and then the PLC gives the work command, and the welding torch performs welding. The AC motor 23 drives the helical gear disc 28 to drive the welding torch to perform a revolving motion. When the welding is just one circle, the limit part on the helical gear disc 28 touches the limit switch to make the AC motor 23 stop working; after a short time, the AC motor 23 Reverse drive helical gear plate 28 gets back to original position, and AC motor 23 cuts off the power immediately and stops rotating, enters standby state, so carries out the workpiece welding of next group. Due to the different workpiece materials to be welded, the required welding time is also different, and the frequency converter can be used to adjust the welding speed to meet the welding quality requirements.

Claims (2)

1. the special-purpose argon arc welding machine of a pipe, comprise argon bottle (1), processing unit (plant) (2), electric cabinet (3), wire-feed motor (4) and flexible welding gun (6) that installment work relation is installed, the external cable of described electric cabinet (3) is drawn by aerial plug-in unit female (5); It is characterized in that: described processing unit (plant) (2) comprises the support (21) with hydraulic lifting cylinder (24), on described support (21), be horizontally installed with the hoistable platform (30) of being controlled by hydraulic lifting cylinder (24); The helical teeth wheel disc (28) that described hoistable platform (30) top is provided with thrust bearing (29) and is driven by worm drive shaft (33) by alternating current generator (23), below is provided with scroll chuck (31) and air motor (22); Described helical teeth wheel disc (28) top is provided with welding gun fixture (26), and welding gun fixture (26) and upper corresponding infrared inductor first (27) and the infrared inductor second (25) of being provided with of support (21).

2. the special-purpose argon arc welding machine of pipe according to claim 1, is characterized in that: described welding gun fixture (26) is installed fixing by left and right free degree adjusting nut (35) and easy on and off degree adjusting nut (34).