WO2018036534A1

WO2018036534A1 - Welding machine

Info

Publication number: WO2018036534A1
Application number: PCT/CN2017/098756
Authority: WO
Inventors: 王文乐; 袁光伟; 张仁堂; 王冬平; 王林森
Original assignee: 北京文源同创科技有限公司; 东方电气集团东方锅炉股份有限公司
Priority date: 2016-08-25
Filing date: 2017-08-24
Publication date: 2018-03-01
Also published as: CN107775159A; CN107775159B; RU2709918C1

Abstract

A welding machine comprises a main machine (4), a motor, a transmission mechanism (8), and a U-shaped rotating piece (7). The motor drives, via the transmission mechanism (8), the U-shaped rotating piece to rotate in a clockwise or counterclockwise direction. The main machine (4) has a U-shaped opening. A U-shaped cable guiding piece (9) is disposed at the U-shaped rotating piece (7). A welding gun frame (11) is disposed at the U-shaped cable guiding piece (9). A welding gun head (10) is disposed at the welding gun frame (11), and connected to a cable (2). A bridge plate (16) is hinged to one side of the U-shaped cable guiding piece (9). The bridge plate (16) can rotate to close an opening of the U-shaped cable guiding piece. The welding machine is not limited by the length and shape of a small tube base, implementing automated welding, moving flexibly, being simple in operation, and increasing welding quality and efficiency.

Description

Welding machine

Technical field

The present application relates to the field of welding, and in particular to a welding machine.

Background technique

The welding of the outer fillet welds of small pipe sockets is extremely common in actual production, such as boilers, pressure vessels, petrochemicals, shipbuilding and other industries, as well as other industrial fields.

For dense small pipe bases with small pitches and long pipe lengths with long lengths or tops with elbows, such as long pipe sockets on boiler headers, automatic welding of small pipe sockets has always been a problem. With the continuous improvement of boiler product parameters, the material grade of boiler headers has also been continuously improved. For high-parameter boilers, 12Cr1MoVG and above have become the main choice materials for container products. At present, such welding consumables are mainly flux-cored welding wires with a diameter of 1.2 mm. Due to the poor rigidity of the flux-cored welding wire, the wire feeding resistance is large and the welding stability is poor. At the same time, most of the header products are mainly long-seat structures. The welding operation space is small and the accessibility is poor. The material grade of the base metal and the complexity of the welded structure increase the difficulty of welding and put forward higher requirements for the guarantee of welding quality. At present, the small-seat fillet welds in the domestic boiler industry are all hand-welded, the welding workload is large, the labor intensity is large, the welding quality is greatly affected by human factors, the quality is not easy to guarantee, and the production efficiency is low.

Chinese Patent ZL200410025592.9 discloses an automatic welding process and device for a long pipe joint of a boiler header, and relates to a non-filled argon arc welding (TIG) welding process for a long pipe joint of a boiler header, wherein the device is adopted on the market. The mature pipe tube welding machine is rebuilt, and the device includes a rotating mechanism, a motor, etc., but since the welding wire cannot be filled, it is only suitable for bottoming welding (self-melting) of the long pipe joint from the outside, and the outer fillet welding cannot be completed. Seam welding.

In addition, Chinese patent ZL201220432549.4 discloses an improved type of short joint pipe fillet weld submerged arc automatic welding equipment. Because it adopts the method of inserting the center of the pipe for positioning, only the short pipe seat can be welded, and the long pipe cannot be welded. Long tube base with elbows on the top and top.

Therefore, the welding of the boiler box headers in the boiler industry and other industrial industries with similar manufacturing processes require a device that can achieve automatic welding of the small fillet welds to greatly improve the degree of automation, production efficiency and product manufacturing quality.

Summary of the invention

The object of the present application is to provide a welding machine which realizes continuous feeding of a welding torch cable around a pipe (≥400°) for one week, and solves the problem of welding the outer joint of the long pipe seat with the long pipe seat and the top with the elbow. The object of the present application is also to provide a welding machine which is convenient, quick, flexible, easy to operate, and has low requirements on the processing and assembly precision of the small pipe groove.

The object of the present application is achieved by a welding machine comprising a machine body, a motor, a transmission mechanism and a U-shaped rotating body, wherein the motor drives the U-shaped rotating body to rotate clockwise and counterclockwise via the transmission mechanism, The body has a U-shaped opening, and the U-shaped rotating body is provided with a U-shaped cable guiding member, the U-shaped cable guiding member is provided with a welding gun bracket, and the welding gun nozzle is disposed on the welding gun bracket. The torch tip is connected to a cable, and one side of the U-shaped cable guide is hingedly provided with a bridge plate that is rotatable to close the opening of the U-shaped cable guide.

According to an aspect of the welding machine of the present application, the torch holder is movably disposed on the U-shaped cable guide.

According to an aspect of the welding machine of the present application, the welding machine further includes a plurality of legs, the legs being respectively disposed on the body.

According to an aspect of the welding machine of the present application, the welding machine further includes a center positioning die disposed on a bottom side of the inside of the U-shaped opening of the body, and the center positioning die is provided with a replaceable positioning pin.

According to an aspect of the welding machine of the present application, the welding machine further includes a pair of elastic clamping plates disposed on both sides of the inside of the U-shaped opening of the body.

According to an aspect of the welding machine of the present application, the welding machine further includes a cable entry bracket disposed on the body through which the cable of the welding gun passes.

According to an aspect of the welding machine of the present application, the welding machine further includes a spring, one end of the spring being fixed to the cable entry bracket, and the other end of the spring being fixed to the cable.

The welding machine of the invention can be used for automatic welding of the fillet welds of the small pipe socket, overcomes the limitations of the prior art, achieves the diversity of the welding process and the extensive application fields, and the main beneficial effects and advantages thereof are as follows:

1) The welding gun cable can be wound on the U-shaped cable guide ≥400°, which realizes the conveying of the welding wire (included in the cable) (especially the flux-cored wire) under the condition of R50mm circumference and winding ≥400°. The problem of welding the outer joints of the long tube seat with the long tube seat and the elbow with the elbow at the top is solved fundamentally;

2) Positioning and clamping methods are simple and efficient;

3) The position of the welding gun tip can be adjusted;

4) The welding machine is designed as a hand-held structure with a weight of only about 4Kg; it has a small footprint, is flexible, easy to operate, and has a wide range of practical applications.

DRAWINGS

The invention will now be described more fully hereinafter with reference to the accompanying drawings

1 is a schematic view of a welding machine in accordance with an embodiment of the present invention.

2 is a cross-sectional view of a welding machine in accordance with an embodiment of the present invention.

Figure 3 is a cross-sectional view of the welding machine shown in Figure 2 without a welding torch.

4 is a schematic view showing the working state of a welding machine according to an embodiment of the present invention.

For the sake of clarity, the drawings are schematic and simplified, and only the details necessary for understanding the invention are given, and other details are omitted.

detailed description

The scope of applicability of the present invention will be apparent from the detailed description given below. It should be understood, however, that the detailed description and specific examples are in the

1 is a schematic view showing a welding machine according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing the welding machine shown in FIG. 1, and FIG. 3 is a cross-sectional view showing the welding machine shown in FIG. 2 not including a welding torch. As shown As shown in FIGS. 1-3, the welding machine of this embodiment includes a body 4, a motor (not shown), a transmission mechanism 8, a U-shaped swivel 7, a U-shaped cable guide 9, a welding gun holder 11, and a welding gun head 10. , welding torch cable 2, two front legs 13, two rear legs 14, a central positioning die 5, a resilient clamping plate 15, a handle 51, a cable entry bracket 17 and a spring 18. The handle 51 is disposed on the upper surface of the body 4, and a motor and a speed reducer (not shown) are disposed in the handle 51, and the U-shaped swing body 7 is assembled on the body 4. The front leg 13 and the rear leg 14 are respectively disposed on the body 4, and the heights of the front leg 13 and the rear leg 14 are adjustable, for example, by applying spacers of different heights such that the heights of the front leg 13 and the rear leg 14 are Different to suit different application scenarios. The central positioning die 5 is disposed on the bottom side of the U-shaped opening of the body 4. The central positioning die 5 is provided with a replaceable positioning pin 50. The elastic clamping plate 15 is disposed on both sides of the U-shaped opening of the body 4, and is elastic. A replaceable snap pin 52 is provided on the clamping plate 15. The motor rotates clockwise and counterclockwise through the gear drive U-turn body 7 via the speed reducer and the transmission mechanism 8, and the body 4 has a U-shaped opening. A U-shaped cable guide 9, such as a U-shaped cable slot member, is fixed to the bottom plane of the U-shaped swivel body 7 and rotates synchronously therewith, and the upper and/or lower edges of the U-shaped cable guide 9 can be guided. The projection 9A is wound around the U-shaped cable guide 9 with a better guiding cable 2, and the torch holder 11 is height-adjustably disposed on the U-shaped cable guide 9. For example, a chute is provided on the torch holder 11, and a projection provided on the wall of the U-shaped cable guide 9 passes through the chute, so that the torch holder 11 can be moved up and down and can be fixed by a fixing device. The welding gun tip 10 is disposed on the welding gun bracket 11, the welding gun tip 10 is connected to the cable 2, the cable inlet bracket 17 is disposed on the body 4, the cable 2 of the welding torch passes through the cable inlet bracket 17, and one end of the spring 18 is fixed On the cable entry bracket 17, the other end of the spring 18 is fixed to the cable 2, and one side of the U-shaped cable guide 9 is hingedly provided with a bridge plate 16, and the bridge plate 16 is rotatable to close the U-shaped line. The opening of the cable guide 9. In another embodiment, the bridge deck 16 itself can be folded, for example by two parts hinged together.

In another embodiment, the elastic clamping plate 15 can be coupled to the clamping hand wheel 6 via a connecting structure (not shown), and the clockwise and counterclockwise rotation of the clamping hand wheel 6 controls the clamping of the elastic clamping plate 15. Tight and loose, and vice versa.

Figure 4 is a schematic view showing the working state of the welding machine shown in Figures 1-3. The welding machine of the present application is connected to the trolley 1 via an integrated cable 2, which realizes the welding of wire, water, gas and/or electricity. In the automatic welding operation of the outer fillet weld of the small pipe socket, the small pipe base and the base metal are manually spot welded with 2-4 points. fixed. Then, the opening of the two front legs 13 of the welding machine is aligned and inserted into the socket such that the central positioning die 5 abuts against the outer wall of the pipe, and the two front legs 13 and the two rear legs 14 contact the bottom base metal. surface. When the clamping hand wheel 6 is rotated clockwise, the elastic clamping plate 15 will clamp the outer wall of the pipe inward.

The height of the torch holder 11 is adjusted so that the torch tip 10 is precisely aligned with the welding area. After the welding is started, the welding torch head 10 is rotated around the tube with the welding torch cable 2 under the driving of the U-shaped cable guiding member 9, and the welding wire and the shielding gas are sent to the welding gun tip 10 via the cable 2, and the small tube seat is welded at the outer surface of the small tube. The seam is automatically rotated. During the welding process, the cable 2 is pulled into the welding machine via the cable inlet bracket 17 and wound around the outer wall of the U-shaped cable guide 9 once, for example, ≥360°, such as greater than ≥400°, and fixed to the cable entry bracket 17 at the same time. The spring 18 is compressed and stored to prepare for pulling the cable 2 out. When the cable 2 is continuously fed, the bridge plate 16 is pressed inwardly by the pressure, and the inner arc is just buckled at the opening of the U-shaped cable guide 9 to protect the cable 2. Continuous lap welding, cap welding and filling of craters and stopping rotation. When the welding is completed, the start is returned, the torch tip 10 is reversed at a high speed, and the cable 2 is pulled out from the cable entry bracket 17 by the spring 18, and the bridge 16 is automatically opened. The welder is removed and the next tube holder can be welded.

The welding machine of the present application solves the problem of automatic welding of the outer joint of the long tube seat and the long tube head with the elbow at the top, and the outer wall of the tube is used for positioning, and the welding gun cable is wound around the tube for one week (≥400). °) For continuous wire feeding, the GMAW, FCAW or SAW welding method can be used to make the base of the small pipe base, pressurize, cover the surface and finally form a complete outer fillet weld.

The singular forms "a", "the", and "the" It is to be understood that the terms "comprising", "comprising", and" Features, steps, operations, elements, components, and/or combinations thereof. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Some preferred embodiments have been described above, but it should be emphasized that the present invention is not limited to the embodiments, but may be implemented in other embodiments within the scope of the inventive subject matter, and other embodiments do not necessarily include the implementation. All the components of the example.

Claims

A welding machine comprising a body (4), a motor, a transmission mechanism (8) and a U-shaped rotating body (7), wherein the motor drives the U-shaped rotating body clockwise and counterclockwise via the transmission mechanism (8) In the direction of rotation, the body (4) has a U-shaped opening, characterized in that the U-shaped rotating body (7) is provided with a U-shaped cable guide (9), and the U-shaped cable guiding member (9) a welding gun holder (11) is disposed on the welding gun holder (11), the welding gun head (10) is connected to the cable (2), and the U-shaped cable is guided One side of the piece (9) is hingedly provided with a bridge plate (16) that is rotatable to close the opening of the U-shaped cable guide.
A welding machine according to claim 1, characterized in that the welding gun holder (11) is arranged on the U-shaped cable guide (9) so as to be movable up and down.
A welding machine according to claim 1, characterized in that the U-shaped cable guide (9) is provided with a guiding projection (9A).
The welding machine according to claim 1, characterized in that the bridge deck (16) is foldable.
A welding machine according to claim 1, characterized in that said welding machine further comprises a plurality of legs (13, 14), said legs being respectively arranged on said body (4).
A welding machine according to claim 1, characterized in that said welding machine further comprises a central positioning die (5), said central positioning die (5) being disposed at the bottom of the U-shaped opening of said body (4) On the side, the central positioning die (5) is provided with a replaceable positioning pin (50).
A welding machine according to claim 1 or 6, wherein said welding machine further comprises a pair of elastic clamping plates (15), said elastic clamping plates (15) being disposed on said body (4) The sides of the U-shaped opening are inside.
The welding machine according to claim 1, characterized in that the welding machine further comprises a cable inlet bracket (17) provided on the body (4) through which the cable (2) of the welding torch passes. Cable entry bracket (17).
The welding machine according to claim 8, wherein said welding machine further comprises a spring (18), one end of said spring (18) being fixed to said cable entry bracket (17), said spring ( The other end of 18) is fixed to the cable (2).
A welding machine according to claim 1, characterized in that the welding machine further comprises a handle (51) provided on the upper surface of the body (4).