Multi-welding-gun automatic welding device

Abstract

The invention relates to the technical field of automatic welding, in particular to a multi-welding-gun automatic welding device which comprises a welding gun assembly, a base supporting mechanism, a rotary lifting table assembly and a sliding rail supporting table assembly. Each sliding rail supporting table assembly comprises a connecting frame, a second rotary driving mechanism and a radial driving mechanism, and the connecting frames in the multiple sliding rail supporting table assemblies are distributed at intervals in the axial direction of the center shaft; the rotary lifting table assembly is used for driving the welding guns to rotate by an angle to lift up and down, the sliding rail supporting table assembly drives the rotary lifting table assembly and the welding guns on the rotary lifting table assembly to rotate and translate, meanwhile, the center shaft is arranged in a lifting mode, the multiple welding guns are distributed around the center shaft, and multiple layers can be welded at the same time; the welding efficiency and the automation degree are greatly improved, the welding seam cooling time is shortened, the welding quality is improved, the working time is shortened, meanwhile, the welding work can be more flexible through the multiple welding guns, and different welding requirements are met.

Description

Technical Field

[0001] The present invention relates to the technical field of automated welding, and particularly to a multi-welding torch automatic welding device. Background Art

[0002] In the manufacturing and pipeline industries, large-sized flanges and large-diameter butt-welding reducers are very important components, which are widely used in fields such as petroleum, natural gas, electricity, and chemical industry. A flange is a flat disc used to connect pipes, valves, pumps, and other equipment. It is usually made of metal materials and is connected to the pipe by bolts or welding. Large-sized flanges have strong pressure-bearing capacity and are usually used to withstand high pressure and high-temperature environments. They have a wide range of applications and good sealing performance. Due to their large size, the requirements for the strength and toughness of the materials are also correspondingly increased. A butt-welding reducer is a pipe fitting used to connect pipes with different diameters. One of its ports has a larger diameter and the other has a smaller diameter, which is used for the guiding and distribution of fluids. It is connected by butt-welding, avoiding the leakage problem of flanges and being suitable for high-temperature and high-pressure working conditions. Due to its excellent fluid guiding ability and sealing performance, large-diameter butt-welding reducers are commonly used in direct transmission pipelines, petroleum pipelines, chemical pipelines, etc.

[0003] Currently, when many factories in the market weld larger-sized workpieces, most of the designs of the welding torch device adopted are single-welding torch moving mechanisms, and there are some deficiencies, such as: (1) The reason for the slow welding speed is that larger-sized workpieces require longer welding paths, and the moving speed of a single welding torch may not be sufficient to meet the production efficiency requirements, resulting in an extended overall production time and possibly affecting the delivery date. (2) When using a single welding torch to weld large workpieces, the welding heat is concentrated, which may lead to an overly large heat-affected zone, possibly causing changes in the microstructure of the material and affecting the mechanical properties and corrosion resistance of the weld. (3) A single welding torch moves slowly on larger workpieces, easily resulting in inconsistencies in temperature and molten pool control of the weld. If the weld temperature is not properly controlled, problems such as uneven welds and defects such as pores and inclusions may occur. (4) When welding large-sized workpieces, the operator needs to maintain the welding torch in a specific position for a long time, which may cause operator fatigue, thus affecting the welding quality and safety, and at the same time increasing the labor-hour cost of the workers. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to solve the problems in the prior art that when using a single welding torch to weld large workpieces during welding, the welding heat is concentrated, which may lead to an overly large heat-affected zone, possibly causing changes in the microstructure of the material and affecting the mechanical properties and corrosion resistance of the weld, and a single welding torch moves slowly on larger workpieces, easily resulting in inconsistencies in temperature and molten pool control of the weld. Now, a multi-welding torch automatic welding device is provided.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: A multi-welding torch automatic welding device, comprising:

[0006] A plurality of welding torch assemblies;

[0007] A base support mechanism, including a central axis;

[0008] A rotary lifting table assembly, corresponding to the number of welding torch assemblies, including a welding torch support plate for supporting the welding torch assembly, a first rotary drive mechanism for driving the welding torch support plate to rotate circumferentially, and a lifting drive mechanism for driving the welding torch support plate to lift;

[0009] And a slide rail support table assembly, corresponding to the number of welding torch assemblies, including a connecting frame sleeved on the central axis, a second rotary drive mechanism for driving the connecting frame to rotate circumferentially, and a radial drive mechanism for supporting the rotary lifting table assembly and driving it to approach or move away from the central axis. The connecting frames of several slide rail support table assemblies are distributed at intervals along the axial direction of the central axis.

[0010] Further, the first rotary drive mechanism includes a top seat, a first power component installed on the top seat, a first driving wheel connected to the output end of the first power component, and a first driven wheel meshing with the first driving wheel. The first driven wheel is fixed to the welding torch support plate.

[0011] Further, the second rotary drive mechanism includes a second power component installed on the connecting frame, a second driving wheel connected to the output end of the second power component, a second driven wheel sleeved on the central axis, and a synchronous belt connected between the second driving wheel and the second driven wheel.

[0012] Further, the radial drive mechanism includes a third power component installed on the connecting frame, a third driving wheel connected to the output end of the third power component, a third driven wheel, a synchronous chain connected between the third driving wheel and the third driven wheel, and a lead screw nut structure connected to the output end of the third driven wheel. The output end of the lead screw nut structure is connected to the base of the rotary lifting table assembly.

[0013] Further, a plurality of sleeves are formed on the central axis along its axial direction at intervals for supporting the connecting frame.

[0014] Further, a plurality of universal ball bull's eye wheels are installed between the welding torch support plate and the top seat.

[0015] Further, the central axis is arranged to be liftable.

[0016] Further, the lifting drive mechanism is a scissor fork structure.

[0017] Furthermore, the connecting frame includes an upper bracket, a lower bracket and a rib plate connecting the two.

[0018] Furthermore, the welding torch assembly includes a welding torch, a clamping mechanism for clamping the welding torch, and a wire feeding pipe for feeding wire to the welding torch;

[0019] One end of the central axis in the axial direction is a base, and the other end is a wire wheel support seat for placing a metal wire wheel.

[0020] Advantages of the present invention:

[0021] (1) Through the cooperation of the slide rail table assembly and the rotary lifting table assembly, the welding torch and the clamping mechanism can rotate around any position of the central axis and adjust to any height, which greatly meets the welding requirements of different needs of the device, and also improves the versatility and convenience of the device.

[0022] (2) Multiple welding torch assemblies have multiple independent systems, which do not interfere with each other, but can carry out welding work simultaneously. The multiple welding torch assemblies can not only weld different positions of the pipe fitting, but also carry out multi-layer welding on the same position of the pipe fitting, that is, each welding torch assembly welds different layers, and can control the relative position of the welding torch and the weld in real time, so that the relative position of the welding torch and the weld always meets the requirements of the process specifications. The operation is relatively simple. Therefore, the device improves the welding efficiency, reduces the cooling time of the weld, evenly distributes the heat input, reduces the labor cost and production cost, and also improves the automation level of welding. Description of the drawings

[0023] The present invention will be further described below with reference to the drawings and embodiments.

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is the front view of the present invention;

[0026] Figure 3 is the top view of the present invention;

[0027] Figure 4 is the three-dimensional structure diagram of the base support mechanism of the present invention;

[0028] Figure 5 is the front view of the base support mechanism of the present invention;

[0029] Figure 6 is the three-dimensional structure diagram of the slide rail table assembly of the present invention;

[0030] Figure 7 is the front view of the slide rail table assembly of the present invention;

[0031] Figure 8 This is the three-dimensional structure diagram of the rotary lifting table assembly in the present invention;

[0032] Figure 9 This is the front view of the rotary lifting table assembly in the present invention;

[0033] In the figure:

[0034] 1. Base support mechanism; 101. Base, 102. Sleeve, 103. Central shaft; 104. Wire wheel support seat; 105. Fourth power component;

[0035] 2. Slide rail support table assembly; 201. Connecting frame; 2011. Upper support bracket, 2012. Lower support bracket, 2013. Rib plate; 202. Second power component; 203. Second driving wheel; 204. Second driven wheel; 205. Synchronous belt; 206. Third power component; 207. Third driving wheel; 208. Third driven wheel; 209. Synchronous chain; 210. Lead screw nut structure;

[0036] 3. Rotary lifting table assembly; 301. Welding torch support plate; 302. Top seat; 303. First power component; 304. First driving wheel; 305. First driven wheel; 306. Base; 307. Universal ball bull's eye wheel; 308. Scissor fork structure;

[0037] 4. Welding torch assembly; 401. Welding torch, 402. Clamping mechanism, 403. Wire feeding pipe. Detailed implementation manners

[0038] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner. Therefore, they only show the components related to the present invention. Directions and references (such as up, down, left, right, etc.) can only be used to assist in the description of the features in the drawings. Therefore, the following detailed implementation manners are not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalent forms.

[0039] As Figures 1-3 shown, a multi-welding torch automatic welding device includes:

[0040] The welding torch assemblies 4, with a number of several, which can be but not limited to two, three, four, etc., and several welding torch assemblies 4 can work simultaneously;

[0041] The base support mechanism 1, including the central shaft 103;

[0042] The rotary lifting table assembly 3, corresponding in number to the welding torch assembly 4, and each rotary lifting table assembly 3 is used to drive the corresponding welding torch assembly 4 to rotate and lift. It includes a welding torch support plate 301 for supporting the welding torch assembly 4, a first rotary drive mechanism for driving the welding torch support plate 301 to rotate circumferentially, and a lifting drive mechanism for driving the welding torch support plate 301 to lift. The first rotary drive mechanism can adjust the angular position of the welding torch assembly 4, and the lifting drive mechanism can adjust the height of the welding torch 401 (i.e., the axial direction of the central axis 103), greatly improving the flexibility and convenience of the device;

[0043] and the slide rail support table assembly 2, corresponding in number to the rotary lifting table assembly 3 and the welding torch assembly 4, includes a connecting frame 201 sleeved on the central axis 103, a second rotary drive mechanism for driving the connecting frame 201 to rotate circumferentially, and a radial drive mechanism for supporting the rotary lifting table assembly 3 and driving it to approach or move away from the central axis 103. The connecting frames 201 in several slide rail support table assemblies 2 are distributed at intervals along the axial direction of the central axis 103, that is, at different heights.

[0044] During operation, each radial drive mechanism drives the corresponding welding torch assembly 4 to move radially to match the inner diameter of the pipe fittings to be welded with different pipe diameters. Each second rotary drive mechanism drives the corresponding welding torch assembly 4 to rotate around the central axis 103 to weld the pipe fittings. At the same time, the lifting drive mechanism can drive the corresponding welding torch assembly 4 to lift, so that several welding torch assemblies 4 are located at different heights to weld different positions of the pipe fittings, realizing multi-weld seams to be carried out simultaneously and improving the working efficiency of welding; or the lifting drive mechanism can drive several welding torch assemblies 4 to be located at the same height to carry out multi-layer welding on the same position of the pipe fittings. Because it has multiple welding torches 401 and has an independent control system, it can complete welding simultaneously or independently, and is equipped with a detection device to detect the welding position and monitor the temperature. At the same time, through the real-time control of the relative position of the welding torch 401 and the weld seam by the radial drive mechanism, the time of waiting for each weld seam to be completed before welding the next layer is saved, and the weld seam cooling time and working hours are reduced, thus reducing the production cost, greatly improving the welding efficiency and quality. On the other hand, the operation is relatively simple, the automation level of the device is greatly improved, the working environment is also improved, and the probability of safety accidents is greatly reduced.

[0045] In some examples, the first rotation driving mechanism includes a top seat 302, a first power member 303 mounted on the top seat 302, a first driving wheel 304 connected to the output end of the first power member 303, and a first driven wheel 305 meshing with the first driving wheel 304. The first driven wheel 305 is coaxially fixed with the welding torch support plate 301 and is located below the welding torch support plate 301, and the welding torch 401 is located above the welding torch support plate 301. When the first power member 303 is started, the first power member 303 drives the first driving wheel 304 to rotate, the first driving wheel 304 drives the first driven wheel 305 to rotate, and the welding torch support plate 301 and the welding torch assembly 4 thereon rotate synchronously for angle adjustment.

[0046] In some examples, the second rotation driving mechanism includes a second power member 202 mounted on the connecting frame 201, a second driving wheel 203 connected to the output end of the second power member 202, a second driven wheel 204 sleeved on the central shaft 103 and fixed to the connecting frame 201, and a timing belt 205 connected between the second driving wheel 203 and the second driven wheel 204. A tensioning wheel for tensioning the timing belt 205 is mounted on the connecting frame 201. When the second power member 202 is started, the second power member 202 drives the second driving wheel 203 to rotate, the second driving wheel 203 drives the second driven wheel 204 to rotate through the timing belt 205, and the connecting frame 201 and the welding torch assembly 4 thereon rotate synchronously for circumferential welding of the pipe fittings. The multiple welding torch assemblies 4 are independent of each other and their rotations do not interfere with each other.

[0047] In some examples, the radial driving mechanism includes a third power member 206 mounted on the connecting frame 201, a third driving wheel 207 connected to the output end of the third power member 206, a third driven wheel 208, a synchronous chain 209 connected between the third driving wheel 207 and the third driven wheel 208, and a lead screw nut structure 210 connected to the output end of the third driven wheel 208. The output end of the lead screw nut structure 210 is connected to the base 306 of the rotary lifting table assembly 3. A slide rail-slider combination is provided between the base 306 and the connecting frame 201. When the third power member 206 is started, the third power member 206 drives the third driving wheel 207 to rotate, the third driving wheel 207 drives the third driven wheel 208 to rotate through the synchronous chain 209, the third driven wheel 208 drives the lead screw in the lead screw nut structure 210 to rotate, thereby driving the base 306 and the welding torch assembly 4 thereon to reciprocate radially to realize welding of pipe fittings with different diameters, greatly improving the welding efficiency and automation degree. The slide rail-slider combination can guide the movement of the base 306.

[0048] In some examples, a plurality of sleeves 102 are formed along the axial direction of the central shaft 103 at intervals and are used to support the connecting frame 201. Each sleeve 102 protrudes radially from the central shaft 103 to form a supporting step for supporting the sleeve 102 between it and the central shaft 103.

[0049] In some examples, a plurality of universal ball bull's-eye wheels 307 are installed between the welding torch support plate 301 and the top seat 302. They are circumferentially distributed around the first driven wheel 305. When the first power member 303 drives the welding torch support plate 301 to rotate, the universal ball bull's-eye wheels 307 assist it. The universal ball bull's-eye wheels 307 can bear a large load, have a good damping effect, can rotate freely in any direction, reduce friction, and improve the service life of the equipment.

[0050] In some examples, the central shaft 103 is arranged to be lifted and lowered. It can be moved up and down by a fourth power member 105, thereby driving the slide rail support table assembly 2, the rotary lifting table assembly 3, and the welding torch assembly 4 thereon to be lifted and lowered synchronously, meeting the requirements for welding pipe fittings of different length dimensions and improving the flexibility of the device.

[0051] In some examples, the lifting drive mechanism is a scissor fork structure 308 drive mechanism (not shown in the figure). One end of it is slidably connected to the base 306, and the other end is slidably connected to the top seat 302. It can convert the horizontal translation into vertical lifting.

[0052] In some examples, the connecting frame 201 includes an upper bracket 2011, a lower bracket 2012, and a rib plate 2013 connected between the two. The upper bracket 2011 and the lower bracket 2012 are both supported by the sleeve 102. The upper bracket 2011 is horizontally arranged, the lower bracket 2012 is inclined, and the rib plate 2013 connected between the two is triangular. Adjacent two are fixed by bolts. This structure provides stable support for the welding torch assembly 4.

[0053] In some examples, the welding torch assembly 4 includes a welding torch 401, a clamping mechanism 402 for clamping the welding torch 401, and a wire feeding pipe 403 for feeding wire to the welding torch 401. The up and down height and swing amplitude of the welding torch 401 are controlled by arc voltage adjustment.

[0054] One end of the central shaft 103 along its axial direction is a base 101, which provides a supporting and fixing function. The other end is a wire wheel support seat 104 for placing a metal wire wheel. The wire wheel support seat 104 is provided with a through groove for the wire to extend out.

[0055] Working principle:

[0056] During operation, each third power component 206 drives the corresponding welding torch 401 to move radially to match the inner diameter of the pipe fittings to be welded with different pipe diameters. Each second power component 202 drives the corresponding welding torch 401 to rotate around the central axis 103 to weld the pipe fittings. At the same time, the scissor lift structure 308 can drive the corresponding welding torch 401 to move up and down, so that several welding torches 401 are located at different heights to weld different positions of the pipe fittings, realizing multi-pass welding simultaneously and improving the working efficiency of welding; or the scissor lift structure 308 can drive several welding torches 401 to be located at the same height to perform multi-layer welding on the same position of the pipe fittings. Because it has multiple welding torches 401 and an independent control system, it can complete welding simultaneously or independently, and is equipped with a detection device to detect the welding position and monitor the temperature. At the same time, through the real-time control of the relative position of the welding torch 401 and the weld by the third power component 206, the time of waiting for each weld to be completed before welding the next layer is saved, and the weld cooling time and man-hours are reduced, thus reducing the production cost and greatly improving the welding efficiency and quality.

[0057] Inspired by the above ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multi-welding gun automatic welding device, characterized in that: include: Welding gun assembly, number of which is several; A base support mechanism including a central axis; The rotary lifting platform assembly corresponds to the number of welding gun assemblies, including a welding gun support plate for supporting the welding gun assembly, a first rotary drive mechanism for driving the welding gun support plate to rotate in a circumferential direction, and a lifting drive mechanism for driving the welding gun support plate to move up and down; And a slide rail support assembly, corresponding to the number of welding gun assemblies, including a connecting frame mounted on the central axis, a second rotary drive mechanism for driving the connecting frame to rotate circumferentially, and a radial drive mechanism for supporting the rotary lifting platform assembly and driving it to approach or move away from the central axis. Several connecting frames in the several slide rail support assemblies are distributed at intervals along the axial direction of the central axis.

2. The multi-welding gun automatic welding device according to claim 1, characterized in that: The first rotary drive mechanism includes a top seat, a first power member installed on the top seat, a first driving wheel connected to the output end of the first power member, and a first driven wheel meshed with the first driving wheel, and the first driven wheel is fixed to the welding gun support plate.

3. The multi-welding gun automatic welding device according to claim 1, characterized in that: The second rotary drive mechanism includes a second power member mounted on the connecting frame, a second driving wheel connected to the output end of the second power member, a second driven wheel sleeved on the central shaft, and a synchronous belt connected to the second driving wheel and the second driven wheel.

4. The multi-welding gun automatic welding device according to claim 1, characterized in that: The radial drive mechanism includes a third power member installed on the connecting frame, a third driving wheel connected to the output end of the third power member, a third driven wheel, a synchronous chain connected between the third driving wheel and the third driven wheel, and a screw nut structure connected to the output end of the third driven wheel, and the output end of the screw nut structure is connected to the base of the rotary lifting platform assembly.

5. The multi-welding gun automatic welding device according to claim 1, characterized in that: The central shaft is formed with a plurality of sleeves arranged at intervals along its axial direction and used for supporting the connecting frame.

6. The multi-welding gun automatic welding device according to claim 2, characterized in that: A plurality of universal ball-buckle wheels are installed between the welding gun support plate and the top seat.

7. The multi-welding gun automatic welding device according to claim 1, characterized in that: The central axis is arranged to be lifted and lowered.

8. The multi-welding gun automatic welding device according to claim 1, characterized in that: The lifting drive mechanism is a scissors-fork structure.

9. The multi-welding gun automatic welding device according to claim 1, characterized in that: The connecting frame comprises an upper bracket, a lower bracket and a rib plate connected therebetween.

10. The multi-welding gun automatic welding device according to claim 1, characterized in that: The welding gun assembly comprises a welding gun, a clamping mechanism for clamping the welding gun, and a wire feeding tube for feeding wire to the welding gun; One end of the central axis along its axial direction is a base, and the other end is a welding wire wheel supporting seat for placing a metal wheel wire disc.

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