Multi-station welding workbench for saddle-shaped welding seam

Abstract

A multi-station welding workbench for a saddle-shaped welding seam is used for pipeline welding of non-consumable electrode gas shielded arc welding and comprises a base, an equipment support and welding equipment, and the base is used for supporting a pipe fitting to be welded; the bottom of the equipment support is movably connected to the base, and the equipment support can horizontally move on the base. The welding equipment is movably connected to the top of the equipment bracket, so that the welding equipment can vertically move relative to the equipment bracket; the welding equipment comprises a welding mechanism and a moving mechanism, the welding mechanism is arranged on the lower portion of the moving mechanism and close to a to-be-welded position, the welding mechanism is driven by the moving mechanism to achieve circular motion, vertical motion and swing motion, a notch is formed in the side portion of the moving mechanism, and the width of the notch is larger than the diameter of a to-be-welded pipe fitting. The saddle-shaped pipe welding machine is suitable for welding of mother pipes and branch pipes of to-be-welded pipe fittings of various specifications, and a saddle-shaped movement track is achieved through circular movement, up-down movement and swinging movement of the movement mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a multi-station welding workbench for saddle-shaped welds. Background Art

[0002] Tig welding is a type of non-metallic gas shielded arc welding widely used in nuclear power pipeline welding. A saddle weld is a spatial curve formed by the contact of a beveled branch pipe or saddle pipe on a main pipe. Essentially, it is a two-dimensional circle stretched to different heights on a vertical plane. The bevel angle varies with spatial position, and the weld angle and depth vary at each spatial position.

[0003] Currently, nuclear power pipelines are typically welded using manual Tig welding. The quality of the resulting saddle welds is highly dependent on the welder's proficiency, and the quality of fillet welds cannot be guaranteed. Furthermore, skilled welders in the manual Tig welding industry are in short supply. Therefore, the use of automatic welding machines is a future trend.

[0004] Currently, six-axis robots are also used to weld saddle-shaped welds. However, due to the length limit of the branch pipe and the limitations of the robot itself, using robots to perform Tig welding of saddle-shaped welds still has many difficulties:

[0005] 1. It is currently impossible to realize the workbench that supports, fixes and positions the mother branch pipes of various specifications. It also needs to realize the up and down, left and right adjustment of the welding equipment and have the function of quickly clamping the welding equipment.

[0006] Second, the length of the branch pipe is too long, and the robotic arm cannot pass over the branch pipe, so the robotic arm cannot complete a complete saddle-shaped weld. If two robotic arms are used for welding, the cost will be too high; or if the saddle-shaped weld is welded in two times, the welding quality of the weld joint cannot be guaranteed.

[0007] 3. The robot can only work according to the preset path and cannot be manually controlled during the welding process. The planning accuracy of the path trajectory depends on the saddle-shaped weld extracted by the visual sensor.

[0008] 4. The robot body can realize angular or horizontal swing of the welding gun, but the swing angle or distance needs to be preset and cannot be changed during the welding process. Since factors affecting welding quality are unavoidable, humans need to observe the welding process in real time and intervene.

[0009] In view of this, the inventors of the present application designed a multi-station welding workbench for saddle-shaped welds in order to overcome the above technical problems. Utility Model Content

[0010] The technical problem to be solved by the utility model is to overcome the defects of the prior art due to the limitation of branch pipe length and the limitation of using a six-axis robot to weld saddle-shaped welds, and to provide a multi-station welding workbench for saddle-shaped welds.

[0011] The utility model solves the above technical problems through the following technical solutions:

[0012] The utility model provides a multi-station welding workbench for saddle-shaped welds, which is characterized in that the multi-station welding workbench is used for pipeline welding of non-melting-electrode gas shielded arc welding, and comprises a base, an equipment bracket and a welding device, wherein the base is used to support the pipe fitting to be welded; the bottom of the equipment bracket is movably connected to the base, and the equipment bracket can move horizontally on the base; the welding device is movably connected to the top of the equipment bracket, so that the welding device can move vertically relative to the equipment bracket; the welding device comprises a welding mechanism and a moving mechanism, the welding mechanism is arranged at the lower part of the moving mechanism, close to the position to be welded, and the welding mechanism realizes circular motion, up and down motion and swinging motion under the drive of the moving mechanism, and the side of the moving mechanism has a notch, and the width of the notch is greater than the diameter of the pipe fitting to be welded.

[0013] According to one embodiment of the present invention, the base includes a movable guide rail and at least two roller frames, the roller frames are movably arranged on both sides of the movable guide rail, and the roller frames can slide on the movable guide rail; the equipment bracket is movably arranged on the movable guide rail, located between the two roller frames, and the equipment bracket can slide on the movable guide rail.

[0014] According to an embodiment of the present invention, the movable guide rail includes at least two circular guide rails, and the circular guide rail has a flange surface, and the flange surface is provided with a mounting hole.

[0015] According to one embodiment of the present invention, each of the roller frames includes at least two rollers, a support plate and a first movable slider, the rollers are fixed to the support plate through a rotating shaft, and the two rollers are symmetrically installed at the same height; the bottom of the support plate is fixedly connected to the first movable slider; the first movable slider is movably arranged on the movable guide rail, and the first movable slider can slide on the movable guide rail.

[0016] According to one embodiment of the present utility model, the equipment bracket includes a second movable slider, a bracket base, a support column, a vertical movable module and a third movable slider, the second movable slider is fixedly connected to the bottom of the bracket base, the second movable slider is movably arranged on the movable guide rail, and the second movable slider can slide on the movable guide rail; the bottom of the support column is fixedly arranged on the bracket base; the vertical movable module is fixedly connected to the upper part of the support column; the third movable slider is movably connected to the vertical movable module, the third movable slider can slide vertically in the vertical movable module, and the welding equipment is fixedly connected to the third movable slider.

[0017] According to one embodiment of the present utility model, the motion mechanism includes a support plate, a circular motion mechanism, a linear motion mechanism and a swinging mechanism, the support plate is fixedly connected to the third movable slider; the circular motion mechanism is movably connected to the support plate, and the circular motion mechanism can perform rotational motion relative to the support plate; the notch is provided on the side of the circular motion mechanism; the linear motion mechanism is fixedly connected to the circular motion mechanism; and the swinging mechanism is fixedly provided on the moving module of the linear motion mechanism.

[0018] According to an embodiment of the present invention, the welding equipment further comprises a wire feeding mechanism, which is fixedly mounted on the circular motion mechanism; and the welding mechanism is clamped on the swing shaft of the swing mechanism.

[0019] According to an embodiment of the present invention, a plurality of groups of running rollers are installed on the support plate, and the circular motion mechanism is rotatably connected to the support plate through the running rollers.

[0020] According to one embodiment of the present utility model, a motor, a synchronous belt driving wheel, a synchronous belt driven wheel and a synchronous belt are also provided on the support plate. The motor drives the synchronous belt driving wheel to rotate, and drives the synchronous belt driven wheel to rotate through the synchronous belt, and the synchronous belt driven wheel drives the circular motion mechanism to perform rotational motion.

[0021] According to one embodiment of the present invention, the circular motion mechanism includes a circular track, a driven gear and a suspension support plate connected in sequence from top to bottom, and the circular motion mechanism is suspended between the running rollers through the circular track; a transmission gear is installed at one end of the driven wheel of the synchronous belt, and the transmission gear is engaged with the driven gear to drive the circular motion mechanism to perform rotational motion.

[0022] According to one embodiment of the present invention, the linear motion mechanism includes a fixed module and a movable module, the fixed module is fixed on the circular motion mechanism; the movable module is connected to the fixed module through a fourth movable slider, and the movable module slides up and down along the fixed module.

[0023] According to one embodiment of the present invention, the swing mechanism includes a swing motor, a swing shaft and a bearing mechanism, the output end of the swing motor is connected to the swing shaft, and is used to drive the swing shaft to rotate; the bearing of the bearing mechanism is passed through the swing shaft, and the swing shaft clamps the welding mechanism to perform rotational motion and pendulum motion.

[0024] According to one embodiment of the present invention, the welding mechanism includes a wire feeding tube and a welding gun, the welding gun is connected to the swing shaft, the wire feeding tube is arranged on the side of the welding gun, and an angle is formed between the wire feeding tube and the welding gun.

[0025] According to an embodiment of the present invention, the wire feeding tube is connected to the welding gun via a connecting plate, and the wire feeding tube is rotatably connected to the connecting plate for adjusting the angle.

[0026] The positive progress effect of this utility model is:

[0027] The multi-station welding workbench of the utility model for saddle-shaped welds has at least the following advantages:

[0028] 1. It can support, fix and position the pipes to be welded and the welding equipment, and can realize multi-station work and rapid clamping of welding equipment.

[0029] 2. The welding workbench of the present invention is an automatic welding device that can be applied to welding pipes of different diameters and can realize a complete saddle-shaped trajectory movement at one time.

[0030] 3. When the welding equipment is in operation, the welding workbench of the present invention allows professional technicians to correct the welding trajectory and the swing amplitude of the welding gun to ensure the welding quality of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals represent the same features throughout, wherein:

[0032] Figure 1 It is a three-dimensional schematic diagram of a multi-station welding workbench for saddle-shaped welds of the utility model.

[0033] Figure 2 It is a front view schematic diagram of welding equipment in a multi-station welding workbench for saddle-shaped welds of the utility model.

[0034] Figure 3 It is a three-dimensional schematic diagram of welding equipment in a multi-station welding workbench for saddle-shaped welds of the utility model.

[0035] Figure 4 It is a schematic diagram of the circular motion mechanism in the multi-station welding workbench for saddle-shaped welds of the utility model.

[0036] Figure 5 The utility model is a schematic diagram of the swing mechanism and the welding mechanism in the multi-station welding workbench for saddle-shaped welds.

[0037] Reference numerals

[0038] Base 1000

[0039] Mobile rail 1100

[0040] Circular guide rail 1110

[0041] Flange surface 1120

[0042] Mounting hole 1130

[0043] Roller rack 1200

[0044] Roller 1210

[0045] Support portion 1220

[0046] First moving slider 1230

[0047] Equipment bracket 2000

[0048] Second moving slider 2100

[0049] Bracket base 2200

[0050] Support column 2300

[0051] Vertical moving module 2400

[0052] Welding equipment 3000

[0053] Welding mechanism 3100

[0054] Wire feed tube 3110

[0055] Welding gun 3120

[0056] Connecting plate 3130

[0057] Motion Mechanism 3200

[0058] Gap 3210

[0059] Support plate 3220

[0060] Running roller 3221

[0061] Tensioner 3222

[0062] Synchronous belt drive pulley 3223

[0063] Synchronous belt driven pulley 3224

[0064] Synchronous belt 3225

[0065] Circular motion mechanism 3230

[0066] Circular Track 3231

[0067] Driven gear 3232

[0068] Suspension support plate 3233

[0069] Linear motion mechanism 3240

[0070] Fixed module 3241

[0071] Mobile module 3242

[0072] Swing mechanism 3250

[0073] Swing motor 3251

[0074] Swing shaft 3252

[0075] Bearing mechanism 3253

[0076] Bevel gear 3254

[0077] Wire feeding mechanism 3300

[0078] 4000 pipe fittings to be welded

[0079] Mother tube 4100

[0080] Branch pipe 4200 DETAILED DESCRIPTION

[0081] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0082] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts. In addition, although the terms used in the present invention are selected from commonly known and commonly used terms, some of the terms mentioned in the present specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description herein. In addition, it is required to understand the present invention not only by the actual terms used, but also by the meaning implied by each term.

[0083] like Figures 1 to 5 As shown, the utility model provides a multi-station welding workbench for saddle-shaped welds, which is used for pipeline welding using non-metallic electrode gas shielded arc welding and includes a base 1000 , an equipment bracket 2000 and a welding device 3000 .

[0084] The base 1000 is used to support the pipe 4000 to be welded.

[0085] The bottom of the equipment bracket 2000 is movably connected to the base 1000, and the equipment bracket 2000 can move horizontally on the base 1000; the welding equipment 3000 is movably connected to the top of the equipment bracket 2000, so that the welding equipment 3000 can move vertically relative to the equipment bracket 2000.

[0086] The welding equipment 3000 includes a welding mechanism 3100 and a moving mechanism 3200. The welding mechanism 3100 is arranged at the lower part of the moving mechanism 3200, close to the place to be welded. The welding mechanism 3100 realizes circular motion, up and down motion and swinging motion under the drive of the moving mechanism 3200. The side of the moving mechanism 3200 has a notch 3210, and the width of the notch 3210 is greater than the diameter of the pipe 4000 to be welded.

[0087] The width of the notch 3210 is greater than the diameter of the pipe 4000 to be welded, which can facilitate the pipe 4000 to be welded to be directly placed in the welding device 3000.

[0088] The multi-station welding workbench for saddle-shaped welds of the utility model can be used in a prefabrication workshop. It is a multi-station workbench that can support, fix and position the pipe fittings 4000 to be welded and the welding equipment 3000. The welding workbench is suitable for welding the main pipe 4100 and the branch pipe 4200 of the pipe fittings 4000 to be welded of various specifications. The welding equipment 3000 realizes a saddle-shaped motion trajectory through the circular motion, up and down motion and swinging motion of the motion mechanism 3200. The swinging motion of the motion mechanism 3200 causes the welding mechanism 3100 to perform a pendulum motion in the weld. The entire welding process can be monitored and manually corrected.

[0089] like Figure 1 As shown, as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, the base 1000 includes a movable guide rail 1100 and at least two roller frames 1200. The roller frames 1200 are movably arranged on both sides of the movable guide rail 1100, and the roller frames 1200 can slide on the movable guide rail 1100.

[0090] The equipment bracket 2000 is movably arranged on the movable guide rail 1100 and is located between the two roller frames 1200 . The equipment bracket 2000 can slide on the movable guide rail 1100 .

[0091] The roller frame 1200 can slide on the movable guide rail 1100 and be fixed at a preset position. The equipment bracket 2000 is installed between the two roller frames 1200 and can move between the left and right roller frames 1200.

[0092] Preferably, the movable guide rail 1100 is fixed to the ground or foundation, and two sets of sliders can be provided at the bottom of the roller frame 1200, which can move linearly along the movable guide rail 1100. The roller frame 1200 is used to support the main pipe 4100 of the pipe 4000 to be welded, and the branch pipe 4200 is pre-spot-welded to the main pipe 4100.

[0093] Preferably, the equipment support 2000 can utilize the same sliders as the roller frame 1200 and be fixed to the movable guide rail 1100. The equipment support 2000 is preferably provided with an external plate, to which the welding equipment 3000 can be connected via bolts. The equipment support 2000 and the welding equipment 3000 remain relatively stationary and can move together on the movable guide rail 1100.

[0094] The arrangement of the roller frame 1200 and the movable guide rail 1100 makes the length of the mother pipe 4100 of the pipe fitting 4000 to be welded no longer limited, thereby solving the problem that a single mother pipe 4100 is too long to be welded.

[0095] like Figure 1 As shown, as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, the movable guide rail 1100 includes at least two circular guide rails 1110 , and the circular guide rail 1110 has a flange surface 1120 , and a mounting hole 1130 is provided on the flange surface 1120 .

[0096] Preferably, the mounting holes 1130 on the flange surfaces 1120 of the two circular guide rails 1110 are bolt holes and are fixed by anchor bolts.

[0097] like Figure 1 As shown, as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, each roller frame 1200 includes at least two rollers 1210 , a support portion 1220 and a first movable slider 1230 .

[0098] The roller 1210 is fixed on the support portion 1220 via a rotating shaft, and the two rollers 1210 are installed symmetrically at the same height.

[0099] The bottom of the support portion 1220 is fixedly connected to the first movable slider 1230 .

[0100] The first movable slider 1230 is movably disposed on the movable guide rail 1100 , and the first movable slider 1230 can slide on the movable guide rail 1100 .

[0101] Preferably, the rollers 1210 are two stainless steel wheels coated with polyurethane. The stainless steel wheels are installed symmetrically and at the same height and are fixed to the support plate 3220 through a rotating shaft. Two groups of first movable sliders 1230 are symmetrically installed at the bottom of the support part 1220. The sliders contain balls inside, and the sliding friction is reduced through the point-to-surface contact between the balls and the guide rails.

[0102] like Figure 1 As shown, as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, the equipment bracket 2000 includes a second movable slider 2100, a bracket base 2200, a support column 2300, a vertical movable module 2400 and a third movable slider.

[0103] The second movable slider 2100 is fixedly connected to the bottom of the bracket base 2200 . The second movable slider 2100 is movably arranged on the movable guide rail 1100 . The second movable slider 2100 can slide on the movable guide rail 1100 .

[0104] The bottom of the support column 2300 is fixedly mounted on the bracket base 2200 .

[0105] The vertical moving module 2400 is fixedly connected to the upper portion of the support column 2300 .

[0106] The third movable slider is movably connected to the vertical movable module 2400 . The third movable slider can slide vertically in the vertical movable module 2400 . The welding device 3000 is fixedly connected to the third movable slider.

[0107] Preferably, the vertical moving module 2400 is connected to the support column 2300 by bolts, and the third moving slider can slide vertically in the vertical moving module 2400. The slider is provided with bolt holes for connecting to the main body of the welding equipment 3000.

[0108] like Figure 2 As shown in FIG. 3 , as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, the motion mechanism 3200 includes a support plate 3220, a circular motion mechanism 3230, a linear motion mechanism 3240 and a swing mechanism 3250.

[0109] The support plate 3220 is fixedly connected to the third movable slider.

[0110] The circular motion mechanism 3230 is movably connected to the support plate 3220 , and the circular motion mechanism 3230 can rotate relative to the support plate 3220 ; a notch 3210 is provided on the side of the circular motion mechanism 3230 .

[0111] The linear motion mechanism 3240 is fixedly connected to the circular motion mechanism 3230 .

[0112] The swing mechanism 3250 is fixedly mounted on the moving module 3242 of the linear motion mechanism 3240 .

[0113] The width of the side notch 3210 of the circular motion mechanism 3230 is greater than the diameter of the pipe 4000 to be welded, which can facilitate the pipe 4000 to be welded to be directly placed in the welding device 3000.

[0114] Saddle-shaped welds are welded by means of the circular motion mechanism 3230, the linear motion mechanism 3240 and the swing mechanism 3250. The circular motion of the circular motion mechanism 3230 and the up and down motion of the linear motion mechanism 3240 form a saddle-shaped trajectory. The welding gun 3120 is adjusted to the weld normal angle by adjusting the angle through the swing mechanism 3250.

[0115] Due to the setting of the swing mechanism 3250 and the linear motion mechanism 3240, the welder can adjust the angle and position of the welding gun 3120 by observing the weld conditions in real time.

[0116] like Figure 2 As shown, as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the utility model, the welding equipment 3000 also includes a wire feeding mechanism 3300, which is fixedly mounted on the circular motion mechanism 3230; the welding mechanism 3100 is clamped on the swing shaft 3252 of the swing mechanism 3250.

[0117] Preferably, the linear motion mechanism 3240 and the wire feeding mechanism 3300 are connected to the circular motion mechanism 3230 by bolts, and the swing mechanism 3250 is installed on the slider of the linear motion mechanism 3240. The wire feeding mechanism 3300 includes a wire feeder and a wire feeding reel, which are fixed to the circular motion mechanism 3230 at a certain angle.

[0118] The wire feeding mechanism 3300 is suspended on the circular motion mechanism 3230, which can reduce the length of the wire feeding tube 3110 and stabilize the welding wire output.

[0119] like Figure 2 As shown, as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, multiple sets of running rollers 3221 are installed on the support plate 3220, and the circular motion mechanism 3230 is rotatably connected to the support plate 3220 through the running rollers 3221.

[0120] Preferably, three groups of V-shaped running rollers 3221 are installed on the support plate 3220, and the circular motion mechanism 3230 is fixed by the three groups of V-shaped running rollers 3221 on the support plate 3220, so that the circular motion mechanism 3230 can rotate.

[0121] like Figure 3As shown in FIG. 3 , as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, a motor, a synchronous belt driving wheel 3223, a synchronous belt driven wheel 3224 and a synchronous belt 3225 are further provided on the support plate 3220.

[0122] The motor drives the synchronous belt driving wheel 3223 to rotate, drives the synchronous belt driven wheel 3224 to rotate through the synchronous belt 3225, and the synchronous belt driven wheel 3224 drives the circular motion mechanism 3230 to perform rotational motion.

[0123] The top surface of the support plate 3220 is installed with a synchronous belt 3225, a synchronous belt driving wheel 3223 and a synchronous belt driven wheel 3224. The bottom surface of the support plate 3220 has a through hole and is fixedly connected to the third movable slider of the equipment bracket 2000 with bolts and nuts.

[0124] Preferably, a tensioner 3222 is further installed on the top surface of the support plate 3220, and the synchronous belt 3225 can be an arc-shaped synchronous belt.

[0125] like Figure 4 As shown in FIG. 3 , as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, the circular motion mechanism 3230 includes a circular track 3231, a driven gear 3232, and a suspension support plate 3233 connected in sequence from top to bottom.

[0126] The circular motion mechanism 3230 is suspended between the running rollers 3221 via a circular track 3231;

[0127] A transmission gear is mounted on one end of the synchronous belt driven pulley 3224, and the transmission gear engages with the driven gear 3232 to drive the circular motion mechanism 3230 to perform rotational motion. The linear motion mechanism 3240 and the wire feeding mechanism 3300 can be fixed on the suspension support plate 3233.

[0128] Preferably, the circular track 3231, the driven gear 3232 and the suspension support plate 3233 are connected as a whole by bolts to facilitate the replacement of worn parts. The driven gear 3232 is engaged with the transmission gear. There are preferably two synchronous belt driven pulleys 3224, each with a transmission gear installed at one end.

[0129] The circular motion mechanism 3230 uses a synchronous belt 3225 for transmission. The transmission is precise, stable, efficient and has a certain buffering and shock-absorbing capacity. It can cope with the axial load force of the welding equipment 3000, making the equipment run more smoothly and reliably during welding.

[0130] like Figure 2As shown, as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, the linear motion mechanism 3240 includes a fixed module 3241 and a movable module 3242 .

[0131] The fixed module 3241 is fixed on the circular motion mechanism 3230 .

[0132] The movable module 3242 is connected to the fixed module 3241 via a fourth movable slider, and the movable module 3242 slides up and down along the fixed module 3241 .

[0133] Driven by the fourth movable slider, the movable module 3242 slides up and down along the fixed module 3241 .

[0134] Preferably, the linear motion mechanism 3240 is composed of modules placed horizontally and vertically, the horizontal fixed module 3241 is fixed on the circular motion mechanism 3230, and the vertical movable module 3242 is connected to the horizontal fixed module 3241 through a slider.

[0135] like Figure 2 As shown in FIG. 3 , as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, the swing mechanism 3250 includes a swing motor 3251 , a swing shaft 3252 and a bearing mechanism 3253 .

[0136] The output end of the swing motor 3251 is connected to the swing shaft 3252 to drive the swing shaft 3252 to rotate;

[0137] The bearing of the bearing mechanism 3253 is installed on the swing shaft 3252, and the swing shaft 3252 clamps the welding mechanism 3100 to perform rotational motion and pendulum motion.

[0138] Preferably, the swing motor 3251 is a servo motor, which drives the swing shaft 3252 to rotate through the bevel gear 3254. A clamping structure is provided on the swing shaft 3252. The swing shaft 3252 is supported by a bearing mechanism 3253. The bearing mechanism 3253 includes a rolling bearing and a bearing seat. The swing shaft 3252 is supported by the rolling bearing for rotation.

[0139] like Figure 5 As shown, as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, the welding mechanism 3100 includes a wire feeding tube 3110 and a welding gun 3120, the welding gun 3120 is connected to the swing shaft 3252, the wire feeding tube 3110 is arranged on the side of the welding gun 3120, and there is an angle between the wire feeding tube 3110 and the welding gun 3120.

[0140] like Figure 5As shown, as a preferred embodiment of the multi-station welding workbench for saddle-shaped welds of the present invention, the wire feeding tube 3110 is connected to the welding gun 3120 through a connecting plate 3130, and the wire feeding tube 3110 and the connecting plate 3130 are rotatably connected to each other for adjusting the angle.

[0141] Preferably, the welding gun 3120 is a Tig welding gun, and the wire feed tube 3110 is hinged on the arc-shaped connecting plate 3130. The arc-shaped connecting plate 3130 can move along the track groove of the circular track 3231. The wire feed tube 3110 and the Tig welding gun are at a certain angle and relatively stationary. The welding mechanism 3100 may also include a water cable.

[0142] The arrangement of the wire feed tube 3110 allows the wire feed angle to be adjusted up and down, left and right, and forward and backward. The problem of wire feed position conflict in the saddle weld groove can be solved by adjusting the position of the wire feed tube 3110.

[0143] The multi-station welding workbench for the saddle-shaped weld of the utility model can also include a welding electric pipe, a water tank and a control system.

[0144] The multi-station welding workbench for saddle-shaped welds of the utility model is a multi-station workbench that can support, fix and position the pipe fittings 4000 to be welded, including the mother branch pipe 4200, and the welding equipment 3000. The welding workbench is suitable for welding the mother pipe 4100 and the branch pipe 4200 of the pipe fittings 4000 to be welded of various specifications. The welding equipment 3000 realizes a saddle-shaped motion trajectory through the circular motion mechanism 3230, the linear motion mechanism 3240 and the swing mechanism 3250. The tungsten electrode of the Tig welding gun performs a pendulum motion in the weld, and the entire welding process can be monitored and manually corrected.

[0145] The equipment support 2000 of this multi-station welding workbench for saddle-shaped welds can drive the welding equipment 3000 between different stations, allowing welding of other branch pipes 4200 during the cooling period, saving waiting time and improving work efficiency. This utility model uses a customized welding machine, which allows manual correction of the welding path and the swing position and angle of the welding gun 3120 during the welding process to ensure satisfactory welding quality.

[0146] In summary, the multi-station welding workbench for saddle-shaped welds of the present invention has the following advantages:

[0147] First, it can support, fix and position the pipe 4000 to be welded and the welding equipment 3000, and can realize multi-station work and rapid clamping of the welding equipment 3000.

[0148] 2. The welding workbench of the present invention is an automatic welding device that can be applied to welding pipes of different diameters and can achieve a complete saddle-shaped trajectory movement at one time.

[0149] 3. When the welding equipment 3000 is in operation, professional technicians can correct the welding trajectory and the swing amplitude of the welding gun 3120 to ensure the welding quality of the weld.

[0150] Although specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications shall fall within the scope of protection of the present invention.

Claims

1. A multi-station welding workbench for saddle-shaped welds, characterized in that: The multi-station welding workbench is used for pipeline welding using non-metallic electrode gas shielded arc welding, and includes a base, an equipment bracket, and welding equipment. The base is used to support the pipe fittings to be welded; The bottom of the equipment bracket is movably connected to the base, and the equipment bracket can move horizontally on the base; the welding equipment is movably connected to the top of the equipment bracket, so that the welding equipment can move vertically relative to the equipment bracket; The welding equipment includes a welding mechanism and a moving mechanism. The welding mechanism is arranged at the lower part of the moving mechanism, close to the place to be welded. The welding mechanism realizes circular motion, up and down motion and swinging motion under the drive of the moving mechanism. The side of the moving mechanism has a notch, and the width of the notch is greater than the diameter of the pipe to be welded.

2. The multi-station welding workbench for saddle welds according to claim 1, characterized in that: The base includes a movable guide rail and at least two roller frames, wherein the roller frames are movably arranged on both sides of the movable guide rail and can slide on the movable guide rail; The equipment bracket is movably arranged on the movable guide rail and is located between the two roller frames. The equipment bracket can slide on the movable guide rail.

3. The multi-station welding workbench for saddle welds according to claim 2, characterized in that: The movable guide rail includes at least two circular guide rails, each of which has a flange surface, and a mounting hole is provided on the flange surface.

4. The multi-station welding workbench for saddle welds according to claim 2, characterized in that: Each of the roller frames comprises at least two rollers, a support plate and a first movable slider. The rollers are fixed to the support plate via a rotating shaft, and the two rollers are symmetrically installed at the same height; The bottom of the support plate is fixedly connected to the first movable slider; The first movable slider is movably arranged on the movable guide rail, and the first movable slider can slide on the movable guide rail.

5. The multi-station welding workbench for saddle welds according to claim 2, characterized in that: The equipment bracket includes a second movable slider, a bracket base, a support column, a vertical movable module and a third movable slider. The second movable slider is fixedly connected to the bottom of the bracket base, and the second movable slider is movably arranged on the movable guide rail, and the second movable slider can slide on the movable guide rail; The bottom of the support column is fixedly arranged on the bracket base; The vertical moving module is fixedly connected to the upper part of the support column; The third movable slider is movably connected to the vertical movable module, the third movable slider can slide vertically in the vertical movable module, and the welding equipment is fixedly connected to the third movable slider.

6. The multi-station welding workbench for saddle welds according to claim 5, characterized in that: The motion mechanism includes a support plate, a circular motion mechanism, a linear motion mechanism and a swing mechanism, and the support plate is fixedly connected to the third movable slider; The circular motion mechanism is movably connected to the support plate, and the circular motion mechanism can perform rotational motion relative to the support plate; the notch is provided on the side of the circular motion mechanism; The linear motion mechanism is fixedly connected to the circular motion mechanism; The swing mechanism is fixedly arranged on the moving module of the linear motion mechanism.

7. The multi-station welding workbench for saddle welds according to claim 6, characterized in that: The welding equipment further comprises a wire feeding mechanism, which is fixedly mounted on the circular motion mechanism; and the welding mechanism is clamped on the swing shaft of the swing mechanism.

8. The multi-station welding workbench for saddle welds according to claim 6, characterized in that: A plurality of groups of running rollers are installed on the support plate, and the circular motion mechanism is rotatably connected to the support plate via the running rollers.

9. The multi-station welding workbench for saddle welds according to claim 8, characterized in that: The support plate is also provided with a motor, a synchronous belt driving wheel, a synchronous belt driven wheel and a synchronous belt. The motor drives the synchronous belt driving wheel to rotate, drives the synchronous belt driven wheel to rotate through the synchronous belt, and the synchronous belt driven wheel drives the circular motion mechanism to perform rotational motion.

10. The multi-station welding workbench for saddle welds according to claim 9, characterized in that: The circular motion mechanism includes a circular track, a driven gear and a suspension support plate connected in sequence from top to bottom. The circular motion mechanism is suspended between the running rollers via the circular track; A transmission gear is installed at one end of the synchronous belt driven wheel, and the transmission gear is engaged with the driven gear to drive the circular motion mechanism to perform rotational motion.

11. The multi-station welding workbench for saddle welds according to claim 6, characterized in that: The linear motion mechanism includes a fixed module and a movable module. The fixed module is fixed on the circular motion mechanism; The movable module is connected to the fixed module via a fourth movable slider, and the movable module slides up and down along the fixed module.

12. The multi-station welding workbench for saddle welds according to claim 6, characterized in that: The swing mechanism includes a swing motor, a swing shaft and a bearing mechanism. The output end of the swing motor is connected to the swing shaft for driving the swing shaft to rotate; The bearing of the bearing mechanism is passed through the swing shaft, and the swing shaft clamps the welding mechanism to perform rotational motion and pendulum motion.

13. The multi-station welding workbench for saddle welds according to claim 12, characterized in that: The welding mechanism includes a wire feeding tube and a welding gun. The welding gun is connected to the swing shaft. The wire feeding tube is arranged on the side of the welding gun. There is an angle between the wire feeding tube and the welding gun.

14. The multi-station welding workbench for saddle welds according to claim 13, characterized in that: The wire feeding tube is connected to the welding gun via a connecting plate, and the wire feeding tube is rotatably connected to the connecting plate for adjusting the angle.

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