A fixed chuck welding device for elbow tee and welding process

Abstract

The present invention relates to the technical field of welding devices, and discloses an elbow tee fixed chuck welding device and a welding process, comprising a cross-lifting cantilever and a fixed chuck, a welding system is arranged on the outside of the cross-lifting cantilever, the welding system comprises a horizontal driving guide rail, a welding machine control body and a welding gun base, a wire feeding mechanism is arranged inside the welding gun base, a welding rod and a welding wire guide tube are arranged at the bottom of the welding gun base, and a wire feeding reinforcement mechanism is arranged between the welding wire guide tube and the welding gun base; the welding wire pressing plate is squeezed inwardly by the pressing plate sleeve of the wire feeding reinforcement mechanism, so that the welding wire pressing plate squeezes and fixes the welding wire, thereby ensuring the stability of the extrusion and fixation of the welding wire, thereby ensuring the stability of the wire feeding during the welding process, avoiding the wire slippage phenomenon caused by the swing of the welding gun, thereby effectively ensuring the stability of the wire supply during the three-way pipeline welding, and the overall welding wire clamping process is carried out inside the welding wire guide tube, and the wire feeding direction is driven by the welding wire guide tube, which effectively improves the welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, in particular to an elbow tee fixed chuck welding device and a welding process. Background Art

[0002] During the welding process of large-diameter tee pipes, a chuck is usually used to clamp and fix the tee pipe, and then a pipe welding machine is used to weld the tee pipe interface weld. However, existing automatic pipe welding machines are usually used for butt welding of straight pipes. When welding tee pipes, since the pipe interface is curved, the position of the welding gun needs to be manually controlled during the welding process. As a result, the welding quality is related to the operator's operating skills during the welding process. If there is an operating error or the operator's level is limited, the welding quality of the tee pipe will be reduced.

[0003] At the same time, during the welding process, the automatic pipeline welding equipment includes an automatic wire feeding mechanism. The existing wire feeding mechanism usually has only one wire, which is fed through two wire feeding wheels. However, during the welding process of the three-way pipeline, the welding system needs to perform offset control according to the changes in the weld, which causes the welding wire to move with the welding gun. Therefore, it is easy for the welding wire to be stuck during the movement of the welding gun, resulting in unstable wire feeding, which in turn affects the welding quality and causes the overall three-way pipeline welding quality to decline. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a fixed chuck welding device and welding process for elbow tee, which has the advantages of effectively ensuring the stability of wire feeding, thereby ensuring the stability of tee welding, and facilitating the automated welding of tee pipes, reducing the dependence on the operator's operating skills, and ensuring the stability of tee pipe welding.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A fixed chuck welding device for an elbow tee includes a cross-lift cantilever and a fixed chuck. A welding system is provided on the outside of the cross-lift cantilever. The welding system includes a horizontal drive guide rail, a welding machine control body, and a welding gun base. A wire feeding mechanism is provided inside the welding gun base. A welding rod and a welding wire guide are provided at the bottom of the welding gun base. A wire feeding reinforcement mechanism is provided between the welding wire guide and the welding gun base. The wire feeding reinforcement mechanism is provided at the bottom of the wire feeding mechanism.

[0007] The wire feeding reinforcement mechanism includes a wire feeding guide tube fixedly connected between the welding wire guide tube and the welding gun base, the wire feeding guide tube is slidably connected to the inside of the driving sleeve, the inner guide cone head is fixedly connected to the inside of the driving sleeve, the bottom of the inner guide cone head is fixedly connected to the welding wire pressing piece, the outer part of the inner guide cone head is movably connected to the inner movable ring, the inner side of the inner movable ring is fixedly connected to the pressing piece sleeve, and the pressing piece sleeve is sleeved on the outside of the welding wire pressing piece.

[0008] Preferably, the cross lifting cantilever includes a mounting plate for mounting a welding system, the horizontal driving guide rail is fixedly connected to the outside of the mounting plate, and the fixed chuck is used to mount an elbow tee;

[0009] The welding machine control body can be drivably installed on the outside of the horizontal drive guide rail, the welding machine control body includes a swing arm, the welding gun base is fixedly connected to the outside of the swing arm, a welding wire driving wheel is provided inside the welding gun base, a wire pressing adjustment rod is movably connected to the outside of the welding gun base, a movable wire pressing guide wheel is movably connected to the outside of the wire pressing adjustment rod, the movable wire pressing guide wheel is used to cooperate with the welding wire driving wheel to perform wire feeding, the bottom of the welding wire conduit is fixedly connected to a gooseneck conduit, and a speed meter is provided on the outside of the welding wire driving wheel.

[0010] Preferably: the outside of the inner movable ring is fixedly connected with a connecting pressure rod, the connecting pressure rod passes through the downward extending end of the driving sleeve and is fixedly connected to a limiting chuck, a fixing spring is provided between the limiting chuck and the driving sleeve, the bottom of the driving sleeve is fixedly connected with a guide limiting ring, the fixing spring is sleeved on the outside of the guide limiting ring, the top of the driving sleeve is abutted with a positioning retaining ring, the positioning retaining ring is fixedly connected to the inside of the welding wire conduit, the outside of the wire feeding conduit is fixedly connected with a wire feeding pressure rod, and a driving assembly is provided on the outside of the wire feeding pressure rod.

[0011] Preferably: an annular limiting ratchet is provided on the outside of the guide limiting ring, a pressing piece limiting block is movably connected to the bottom of the limiting chuck, a chuck limiting block is fixedly connected to the inner wall of the wire feeding guide tube, the pressing piece limiting block switches the engagement between the chuck limiting block and the annular limiting ratchet, an adjusting limit block is sleeved on the outside of the chuck limiting block, a limiting spring is provided between the pressing piece limiting block and the adjusting limit block, a transposition limit block is externally clamped on the adjusting limit block, and a transposition spring is provided between the transposition limit block and the limiting chuck.

[0012] Preferably, a reset ring is fixedly connected to the inside of the welding wire conduit, a triangular guide block is provided on the outside of the adjustment limit block, and the reset ring is used to push the adjustment limit block to deviate outward through the triangular guide block.

[0013] Preferably, a reset chute is provided inside the welding wire conduit, a reset guide rod is movably connected to the bottom of the limit chuck, a reset spring is provided between the reset guide rod and the limit chuck, and the reset guide rod is slidably connected to the inside of the reset chute;

[0014] The reset chute includes a vertical chute and an inclined chute. A horizontal chute is provided between the bottom of the inclined chute and the vertical chute. A lifting step is provided between the top of the inclined chute and the vertical chute. The horizontal chute smoothly connects the top of the inclined chute and the vertical chute.

[0015] Preferably: a compressed air chamber is opened inside the driving sleeve, the connecting pressure rod passes through the compressed air chamber, the outside of the connecting pressure rod is fixedly connected to a piston ring, the piston ring is slidably connected to the inside of the compressed air chamber, the bottom of the compressed air chamber is fixedly connected to an air guide pipe, and the air guide pipe extends to the inner end of the inner guide cone head and is provided with an air nozzle.

[0016] Preferably, the distance between the chuck limit block and the reset ring is adapted to the length of the guide limit ring.

[0017] A fixed chuck welding process for an elbow tee, comprising the following steps:

[0018] Step 1: Material preparation: Cut two pipes, cut the nozzle of one pipe to make it arc-shaped, groove the middle of the other pipe, connect the two pipes and adjust the interface to complete the material preparation;

[0019] Step 2: Distance measurement: Clamp and fix the G2 pipe horizontally, lift the G1 pipe, displace the G1 pipe interface 90 degrees to connect it to the G2 pipe, and measure the distance between the end of the G1 pipe and the G2 pipe as L1. Connect the G1 pipe and the G2 pipe interface, and measure the distance between the end of the G1 pipe and the G2 pipe as L2. Record the distance difference between L1 and L2 as L;

[0020] Step 3: Initial welding: Control the lifting equipment to lift the G1 pipe and the G2 pipe cut to connect, spot weld the two pipes, and complete the semi-finished assembly of the elbow tee;

[0021] Step 4: Fix welding: Assemble the semi-finished tee to the fixed chuck of the elbow tee fixed chuck welding device, adjust the cross lifting cantilever to control the welding system to connect to the apex of the arc interface of the G1 pipe, control the rotation of the fixed chuck, and control the welding system to follow the joint of the G1 pipe and the G2 pipe for fixed welding. The left and right movement distance of the welding system is L.

[0022] Preferably: in the step 3, during the spot welding process, the G1 pipe and the G2 pipe are spot welded in a "R" shape, including the top point, bottom point and side transition weld points of the G1 pipe;

[0023] In the step 4, the fixing chuck is fixedly connected to the Gt end of the G1 pipe. In the initial state, the Gt, Gs and Gz ends of the G1 pipe and the G2 pipe are controlled to be at the same horizontal plane.

[0024] Beneficial effects of the present invention:

[0025] 1. The fixed chuck welding device for the elbow tee uses the pressing piece sleeve of the wire feeding reinforcement mechanism to squeeze the wire pressing piece inward, so that the wire pressing piece squeezes and fixes the welding wire, thereby ensuring the stability of the extrusion and fixation of the welding wire, thereby ensuring the stability of the wire feeding during welding, avoiding the wire slippage caused by the swing of the welding gun, and effectively ensuring the stability of the wire supply during the welding of the tee pipe. The entire welding wire clamping process is carried out inside the welding wire guide tube, and the wire feeding direction is driven by the welding wire guide tube, further ensuring the stability of the welding wire feeding direction and effectively improving the welding quality.

[0026] 2. This elbow tee fixed chuck welding device allows gas to blow the welding wire through the gas guide pipe and the air nozzle when the driving sleeve is separated from the inner movable ring under the action of the fixed spring. In addition, the air nozzle maintains the air jet state during the upward reset movement of the driving sleeve and the inner movable ring, thereby achieving the effect of cleaning the dust on the surface of the welding wire, thereby further improving the effect of the welding wire during the welding process and ensuring the welding quality of the tee pipeline.

[0027] 3. The fixed chuck welding process for the elbow tee measures the displacement stroke of the welding rod before welding, and then controls the welding rod to move within the measured distance by the horizontal drive guide 31, thereby achieving the effect of automatic welding and avoiding the trouble of manually controlling the welding line, reducing the dependence on the operator's technical level, thereby ensuring the stability of the overall welding process of the tee pipe and effectively improving the welding quality through automatic welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall welding process and the welding device of the present invention;

[0029] Figure 2 Schematic diagram of the welding system of the present invention;

[0030] Figure 3 This is a schematic diagram of the connection between the welding gun base, welding wire guide tube and welding rod of the present invention;

[0031] Figure 4 A schematic diagram of a welding wire conduit according to the present invention;

[0032] Figure 5 Schematic diagram of the wire feeding reinforcement mechanism of the present invention;

[0033] Figure 6 This is a schematic cross-sectional view of the wire feeding reinforcement mechanism of the present invention;

[0034] Figure 7 This is a schematic diagram of the connection between the inner movable ring, the pressing sleeve and the limiting chuck of the present invention;

[0035] Figure 8 This is a schematic diagram of the welding wire pressing sheet and the pressing sheet sleeve of the present invention in the state of extruding the welding wire;

[0036] Figure 9 This is a schematic diagram of the connection between the reset guide rod and the reset chute of the present invention;

[0037] Figure 10 This is a schematic diagram of the bottom of the limit chuck of the present invention;

[0038] Figure 11 This is a schematic diagram of the L1 position state measurement of the present invention;

[0039] Figure 12 This is a schematic diagram of the spot welding state of the G1 pipeline and the G2 pipeline of the present invention;

[0040] Figure 13 This is a schematic diagram of the welding rod movement stroke coordinates and time of the present invention;

[0041] Figure 14 This is a schematic diagram of the moving stroke coordinates and time of the welding rod in the swing state of the present invention.

[0042] In the figure: 1. Cross lift cantilever; 2. Mounting plate; 3. Welding system; 4. Fixing chuck;

[0043] 31. Horizontal drive rail; 32. Welding machine control unit; 33. Welding gun base; 34. Wire drive wheel; 35. Wire pressure adjustment lever; 36. Movable wire pressure guide wheel; 37. Welding rod; 38. Wire guide tube; 39. Wire feed reinforcement mechanism; 310. Gooseneck guide tube; 311. Speed ​​meter;

[0044] 391. Wire guide tube; 392. Drive sleeve; 393. Inner guide cone; 394. Wire pressing piece; 395. Inner movable ring; 3951. Pressing piece sleeve; 396. Connecting pressure rod; 3961. Piston ring; 397. Limit chuck; 398. Positioning retaining ring; 399. Wire feeding pressure rod; 3910. Drive assembly; 3911. Guide limiting ring; 3912. Retaining spring; 3913. Chuck limiting block; 3914. Reset chute; 3915. Pressing piece limiting block; 39151. Adjusting limiting block; 39152. Limit spring; 39153. Shifting limiting block; 39154. Shifting spring; 39155. Reset ring; 3916. Reset guide rod; 39161. Reset spring.

[0045] 3921. Compressed air chamber; 3922. Air guide tube; 3923. Air nozzle. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] Example 1, please refer to Figure 1 - Figure 10 A fixed chuck welding device for an elbow tee includes a cross-lift cantilever arm 1 and a fixed chuck 4. A welding system 3 is provided on the outside of the cross-lift cantilever arm 1. The welding system 3 includes a horizontal drive guide rail 31, a welding machine control body 32, and a welding gun base 33. A wire feeding mechanism is provided inside the welding gun base 33. A welding rod 37 and a welding wire guide tube 38 are provided at the bottom of the welding gun base 33. A wire feeding reinforcement mechanism 39 is provided between the welding wire guide tube 38 and the welding gun base 33. The wire feeding reinforcement mechanism 39 is provided at the bottom of the wire feeding mechanism.

[0048] The wire feeding reinforcement mechanism 39 includes a wire feeding tube 391 fixedly connected between the welding wire tube 38 and the welding gun base 33. The wire feeding tube 391 is internally slidably connected to a drive sleeve 392. The interior of the drive sleeve 392 is fixedly connected to an inner guide cone head 393. The bottom of the inner guide cone head 393 is fixedly connected to a welding wire pressing plate 394. The outside of the inner guide cone head 393 is movably connected to an inner movable ring 395. The inner side of the inner movable ring 395 is fixedly connected to a pressing plate sleeve 3951. The pressing plate sleeve 3951 is sleeved on the outside of the welding wire pressing plate 394.

[0049] refer to Figure 2-Figure 4 , the cross lifting cantilever 1 includes a mounting plate 2 for mounting a welding system 3, a horizontal drive guide rail 31 is fixedly connected to the outside of the mounting plate 2, and a fixed chuck 4 is used to mount an elbow tee;

[0050] The welding machine control body 32 can be drivably installed on the outside of the horizontal drive guide rail 31. The welding machine control body 32 includes a swing arm, a welding gun base 33 is fixedly connected to the outside of the swing arm, and a welding wire driving wheel 34 is arranged inside the welding gun base 33. The outside of the welding gun base 33 is movably connected to a wire pressing adjustment rod 35, and the outside of the wire pressing adjustment rod 35 is movably connected to a movable wire pressing guide wheel 36 (the welding wire driving wheel 34 and the movable wire pressing guide wheel 36 are used as existing welding wire clamping and wire feeding units, which are not described in detail in the present invention and are only used as the initial wire feeding unit). The movable wire pressing guide wheel 36 is used to cooperate with the welding wire driving wheel 34 to perform wire feeding. The bottom of the welding wire conduit 38 is fixedly connected to a gooseneck conduit 310, and a speed meter 311 is arranged on the outside of the welding wire driving wheel 34.

[0051] It should be noted that during the welding process, the three-way pipe to be welded is installed on the chuck of the fixed chuck 4. When it is fully installed, the cross-lifting cantilever 1 is controlled to work, and the movable end of the cross-lifting cantilever 1 drives the welding system 3 to move through the mounting plate 2, so that the gooseneck conduit 310 at the bottom end of the welding wire conduit 38 and the welding rod 37 are connected to the three-way pipe weld.

[0052] During the welding process, the fixed chuck 4 drives the three-way pipe to rotate, and the horizontal driving guide rail 31 drives the welding rod 37 and the welding wire guide tube 38 to move left and right, so that the welding rod 37 is always aligned with the interface weld of the three-way pipe, thereby ensuring the docking stability of the welding rod 37 and the interface weld of the three-way pipe during the automatic welding process. At the same time, the horizontal driving guide rail 31 controls the welding system 3 to move along the weld of the three-way pipe. The welding machine control body 32 drives the welding gun base 33 to swing back and forth during the welding process through the swing arm rod, so that the welding rod 37 performs reciprocating swing welding to prevent the molten pool from dripping.

[0053] Furthermore, during the welding process, the welding gun base 33 includes a welding wire driving wheel 34 to perform the first wire feeding drive. When the welding wire enters the wire feeding guide tube 391, the wire feeding strengthening mechanism 39 further strengthens the wire feeding, thereby further ensuring the stability of the wire feeding, avoiding the welding wire being stuck during the offset of the welding machine control body 32 and the welding gun base 33, resulting in unstable wire supply, thereby ensuring the stability of the three-way pipe welding.

[0054] refer to Figure 8 It should be noted that in the wire feeding reinforcement mechanism 39, the inner movable ring 395 is sleeved on the outside of the welding wire pressing plate 394 through the pressing plate sleeve 3951 and moves upward, so that the pressing plate sleeve 3951 presses the welding wire pressing plate 394 inward, thereby causing the welding wire pressing plate 394 to squeeze and fix the welding wire.

[0055] refer to Figure 5-Figure 8 In an optional embodiment, the outside of the inner movable ring 395 is fixedly connected to a connecting pressure rod 396, which passes through the downward extending end of the drive sleeve 392 and is fixedly connected to a limiting chuck 397. A fixing spring 3912 is provided between the limiting chuck 397 and the drive sleeve 392. The bottom of the drive sleeve 392 is fixedly connected to a guide limiting ring 3911, and the fixing spring 3912 is sleeved on the outside of the guide limiting ring 3911. The top of the drive sleeve 392 is abutted against a positioning retaining ring 398, and the positioning retaining ring 398 is fixedly connected to the inside of the welding wire conduit 38. The outside of the wire feeding conduit 391 is fixedly connected to a wire feeding pressure rod 399, and the outside of the wire feeding pressure rod 399 is provided with a driving assembly 3910.

[0056] Among them, the outside of the guide limit ring 3911 is provided with an annular limit ratchet, the bottom of the limit chuck 397 is movably connected with a pressure piece limit block 3915, the inner wall of the wire feeding tube 391 is fixedly connected with a chuck limit block 3913, the pressure piece limit block 3915 switches to engage and clamp between the chuck limit block 3913 and the annular limit ratchet, the outside of the chuck limit block 3913 is sleeved with an adjustment limit block 39151, a limit spring 39152 is provided between the pressure piece limit block 3915 and the adjustment limit block 39151, the outside of the adjustment limit block 39151 is clamped with a displacement limit block 39153, and a displacement spring 39154 is provided between the displacement limit block 39153 and the limit chuck 397.

[0057] It should be noted that the drive assembly 3910 can be selected as a hydraulic drive component. In the initial state, the chuck limit block 3913 is located below the pressing plate limit block 3915, and the positioning retaining ring 398 abuts against the top of the drive sleeve 392.

[0058] During the enhanced wire feeding process, the driving assembly 3910 drives the wire feeding tube 391 to move upward through the wire feeding pressure rod 399, and the wire feeding tube 391 drives the limit chuck 397 to move upward through the chuck limit block 3913 and the pressure plate limit block 3915. The limit chuck 397 compresses the fixed spring 3912. At the same time, the limit chuck 397 drives the inner movable ring 395 to move upward inside the driving sleeve 392 through the connecting pressure rod 396, so that the pressure plate sleeve 3951 squeezes the welding wire pressure plate 394, and when the welding wire pressure plate 394 pressurizes and fixes the welding wire, the welding wire pressure plate 394 maintains its position unchanged under the action of the positioning retaining ring 398.

[0059] When the force exerted by the shift spring 39154 on the tablet limiting block 3915 through the shift limit block 39153 and the combined force of the tablet limiting block 3915 and the limiting spring 39152 is less than the force exerted by the chuck limiting block 3913 on the tablet limiting block 3915, under the reverse force, the chuck limiting block 3913 pushes the tablet limiting block 3915 to compress the limiting spring 39152, and at the same time pushes the adjustment limiting block 39151 to slide to the inner end of the shift limit block 39153 ( Figure 10 To adjust the limit block 39151, it is located at the outer end of the displacement limit block 39153. At this time, the pressure plate limit block 3915 and the guide limit ring 3911 are clamped together to ensure the stability of the position of the pressure plate sleeve 3951 and the welding wire pressure plate 394, thereby ensuring the stability of the welding wire pressure plate 394 in clamping the welding wire.

[0060] Furthermore, at this time, the chuck limit block 3913 moves to above the pressing limit block 3915, and the pressing limit block 3915 is offset outward for a certain distance under the action of the limit spring 39152, so that the chuck limit block 3913 abuts against above the pressing limit block 3915, and at the same time, the pressing limit block 3915 and the guide limit ring 3911 maintain a clamped state.

[0061] At this time, the wire feeding tube 391 is controlled to move downward, and the wire feeding tube 391 drives the limit chuck 397 to move downward through the chuck limit block 3913 and the pressure plate limit block 3915. The limit chuck 397 drives the drive sleeve 392 to move downward through the pressure plate limit block 3915 and the guide limit ring 3911, and the drive sleeve 392 drives the welding wire to move downward.

[0062] The welding wire is squeezed and clamped by the welding wire pressing plate 394, thereby effectively ensuring the stability of the welding wire feeding, and the entire welding wire clamping process is carried out inside the welding wire conduit 38. The wire feeding direction is driven by the welding wire conduit 38, further ensuring the stability of the welding wire feeding, thereby ensuring the welding quality of the three-way pipeline.

[0063] In an optional embodiment, a reset ring 39155 is fixedly connected to the inside of the welding wire conduit 38, and a triangular guide block is provided on the outside of the adjustment limit block 39151. The reset ring 39155 is used to push the adjustment limit block 39151 to offset outward through the triangular guide block.

[0064] It should be noted that the reference Figure 6 and Figure 10 When the limit chuck 397 moves downward, the triangular guide block outside the adjustment limit block 39151 contacts the reset ring 39155, and the reset ring 39155 is used to push the adjustment limit block 39151 to offset outward through the triangular guide block, so that the pressure piece limit block 3915 and the guide limit ring 3911 are disengaged. At this time, the limit chuck 397 and the reset ring 39155 are in contact, and the drive sleeve 392 moves upward under the action of the fixed spring 3912, and the drive sleeve 392 drives the welding wire pressure piece 394 to move upward, and the welding wire pressure piece 394 and the pressure piece sleeve 3951 are separated, so that the welding wire pressure piece 394 is disengaged from the restricted welding wire.

[0065] refer to Figure 6 、 Figure 9 and Figure 10 In an optional embodiment, a reset chute 3914 is defined within the wire conduit 38, a reset guide rod 3916 is movably connected to the bottom of the limit chuck 397, a reset spring 39161 is provided between the reset guide rod 3916 and the limit chuck 397, and the reset guide rod 3916 is slidably connected to the reset chute 3914;

[0066] The reset chute 3914 includes a vertical chute and an inclined chute. A horizontal chute is provided between the bottom of the inclined chute and the vertical chute. A lifting step is provided between the top of the inclined chute and the vertical chute. The horizontal chute smoothly connects the top of the inclined chute and the vertical chute.

[0067] It should be noted that, when the wire feeding guide tube 391 further drives the limit chuck 397 to move downward, the limit chuck 397 drives the reset guide rod 3916 to slide inside the reset slide 3914. When the reset guide rod 3916 passes through the inclined slide, the limit chuck 397 is deflected, further causing the chuck limit block 3913 and the pressure piece limit block 3915 to be misaligned, causing the chuck limit block 3913 to be offset to below the pressure piece limit block 3915. At this time, the wire feeding pressure rod 399 is controlled to move upward. Similarly, the drive sleeve 392 and the inner movable ring 395 are reset upward to complete a wire feeding action.

[0068] By repeating the above wire feeding process, the wire feeding during the welding process is completed.

[0069] refer to Figure 6 In an optional embodiment, a compressed air chamber 3921 is opened inside the driving sleeve 392, a connecting pressure rod 396 passes through the compressed air chamber 3921, a piston ring 3961 is fixedly connected to the outside of the connecting pressure rod 396, the piston ring 3961 is slidably connected to the inside of the compressed air chamber 3921, an air guide tube 3922 is fixedly connected to the bottom of the compressed air chamber 3921, and the air guide tube 3922 extends to the inner end of the inner guide cone head 393 and is provided with an air nozzle 3923.

[0070] Among them, the distance between the chuck limit block 3913 and the reset ring 39155 is adapted to the length of the guide limit ring 3911.

[0071] It should be noted that when the driving sleeve 392 is separated from the inner movable ring 395 under the action of the fixed spring 3912, the piston ring 3961 moves relatively downward inside the compressed air chamber 3921, thereby compressing the gas at the bottom of the compressed air chamber 3921, so that the gas blows the welding wire through the air guide tube 3922 and the air nozzle 3923. At the same time, due to the jet damping effect of the air guide tube 3922 and the air nozzle 3923, the air nozzle 3923 maintains the jet state during the upward reset movement of the driving sleeve 392 and the inner movable ring 395, thereby achieving the effect of cleaning the floating dust on the surface of the welding wire, thereby further improving the effect of the welding wire during the welding process and ensuring the welding quality of the three-way pipeline.

[0072] At the same time, during the upward reset sliding process, the cleaning length of the welding wire is adapted to the wire feeding length of the next stage.

[0073] Example 2, reference Figure 11-14 , a fixed chuck welding process for elbow tee, the steps of which include:

[0074] Step 1: Material preparation: Cut two pipes, cut the nozzle of one pipe to make it arc-shaped, groove the middle of the other pipe, connect the two pipes and adjust the interface to complete the material preparation;

[0075] Step 2: Distance measurement: Clamp and fix the G2 pipe horizontally, lift the G1 pipe, displace the G1 pipe interface 90 degrees to connect it to the G2 pipe, and measure the distance between the end of the G1 pipe and the G2 pipe as L1. Connect the G1 pipe and the G2 pipe interface, and measure the distance between the end of the G1 pipe and the G2 pipe as L2. Record the distance difference between L1 and L2 as L;

[0076] Step 3: Initial welding: Control the lifting equipment to lift the G1 pipe and the G2 pipe cut to connect them, spot weld the two pipes, and complete the semi-finished assembly of the elbow tee;

[0077] Step 4: Fix welding: Assemble the semi-finished tee to the fixed chuck 4 of the elbow tee fixed chuck welding device, adjust the cross lifting cantilever 1 to control the welding system 3 to dock the apex of the arc interface of the G1 pipe, control the fixed chuck 4 to rotate, and control the welding system 3 to follow the joint of the G1 pipe and the G2 pipe to perform fixed welding operation. The left and right movement distance of the welding system 3 is L.

[0078] In an optional embodiment, in step 3, during the spot welding process, the G1 pipe and the G2 pipe are spot welded in a "R" shape, including the top point, bottom point and side transition weld points of the G1 pipe;

[0079] In step 4, the fixing chuck 4 is fixedly connected to the Gt end of the G1 pipe. In the initial state, the Gt, Gs and Gz ends of the G1 pipe and the G2 pipe are controlled to be at the same horizontal plane.

[0080] refer to Figure 14 It should be noted that during the welding process, the welding machine control body 32 controls the welding gun base 33 to swing within the range of 5°-8°, thereby preventing the molten pool from dripping. At the same time, when the welding rod 37 swings to the top, it stays for 3-5 seconds, further improving the welding effect of the three-way pipe.

[0081] It should be noted that, based on Example 1, the length of wire consumed in a single swing stroke of the welding rod 37 is the single wire feeding length of the wire feeding enhancement mechanism 39, and the time taken for the driving sleeve 392 and the inner movable ring 395 to reset upward matches the time taken for the welding rod 37 to stop at the top.

[0082] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fixed chuck welding device for an elbow tee, comprising a cross-lifting cantilever (1) and a fixed chuck (4), wherein a welding system (3) is provided on the outside of the cross-lifting cantilever (1), wherein the welding system (3) comprises a horizontal driving guide rail (31), a welding machine control body (32) and a welding gun base (33), wherein a wire feeding mechanism is provided on the inside of the welding gun base (33), and wherein: A welding rod (37) and a welding wire conduit (38) are provided at the bottom of the welding gun base (33); a wire feeding reinforcement mechanism (39) is provided between the welding wire conduit (38) and the welding gun base (33); and the wire feeding reinforcement mechanism (39) is provided at the bottom of the wire feeding mechanism; The wire feeding reinforcement mechanism (39) comprises a wire feeding conduit (391) slidably connected to the inside of the welding wire conduit (38); the inside of the wire feeding conduit (391) is slidably connected to a driving sleeve (392); the inside of the driving sleeve (392) is fixedly connected to an inner guide cone head (393); the bottom of the inner guide cone head (393) is fixedly connected to a welding wire pressing piece (394); the outside of the inner guide cone head (393) is movably connected to an inner movable ring (395); the inner side of the inner movable ring (395) is fixedly connected to a pressing piece sleeve (3951); and the pressing piece sleeve (3951) is sleeved on the outside of the welding wire pressing piece (394); The outer portion of the inner movable ring (395) is fixedly connected to a connecting pressure rod (396), the connecting pressure rod (396) passes through the downwardly extending end of the drive sleeve (392) and is fixedly connected to a limiting chuck (397), a fixing spring (3912) is provided between the limiting chuck (397) and the drive sleeve (392), the bottom of the drive sleeve (392) is fixedly connected to a guide limiting ring (3911), the fixing spring (3912) is sleeved on the outside of the guide limiting ring (3911), the top of the drive sleeve (392) is abutted against a positioning retaining ring (398), the positioning retaining ring (398) is fixedly connected to the inside of the welding wire conduit (38), the outer portion of the wire feeding conduit (391) is fixedly connected to a wire feeding pressure rod (399), and the outer portion of the wire feeding pressure rod (399) is provided with a driving assembly (3910); A compressed air chamber (3921) is provided inside the driving sleeve (392), the connecting pressure rod (396) passes through the compressed air chamber (3921), a piston ring (3961) is fixedly connected to the outside of the connecting pressure rod (396), and the piston ring (3961) is slidably connected to the inside of the compressed air chamber (3921), and an air guide tube (3922) is fixedly connected to the bottom of the compressed air chamber (3921), and the air guide tube (3922) extends to the inner end of the inner guide cone head (393) and is provided with an air nozzle (3923).

2. The elbow tee fixed chuck welding device according to claim 1, characterized in that: The cross lifting cantilever (1) includes a mounting plate (2) for mounting a welding system (3), the horizontal driving guide rail (31) is fixedly connected to the outside of the mounting plate (2), and the fixed chuck (4) is used to mount an elbow tee; The welding machine control body (32) can be drivably installed on the outside of the horizontal drive guide rail (31), the welding machine control body (32) includes a swing arm, the welding gun base (33) is fixedly connected to the outside of the swing arm, the welding gun base (33) is provided with a welding wire driving wheel (34) inside, the welding gun base (33) is externally movably connected to a wire pressing adjustment rod (35), the wire pressing adjustment rod (35) is externally movably connected to a movable wire pressing guide wheel (36), the movable wire pressing guide wheel (36) is used to cooperate with the welding wire driving wheel (34) to perform wire feeding, the bottom of the welding wire conduit (38) is fixedly connected to a gooseneck conduit (310), and the outside of the welding wire driving wheel (34) is provided with a speed meter (311).

3. The elbow tee fixed chuck welding device according to claim 1, characterized in that: The guide limiting ring (3911) is provided with an annular limiting ratchet on the outside, the bottom of the limiting chuck (397) is movably connected with a pressing piece limiting block (3915), the inner wall of the wire feeding guide tube (391) is fixedly connected with a chuck limiting block (3913), the pressing piece limiting block (3915) switches between the chuck limiting block (3913) and the annular limiting ratchet, the chuck limiting block (3913) is sleeved with an adjusting limiting block (39151) on the outside, a limiting spring (39152) is provided between the pressing piece limiting block (3915) and the adjusting limiting block (39151), the adjusting limiting block (39151) is clamped with a transposition limiting block (39153) on the outside, and a transposition spring (39154) is provided between the transposition limiting block (39153) and the limiting chuck (397).

4. The elbow tee fixed chuck welding device according to claim 3, characterized in that: A reset ring (39155) is fixedly connected to the inside of the welding wire conduit (38), and a triangular guide block is provided on the outside of the adjustment limit block (39151). The reset ring (39155) is used to push the adjustment limit block (39151) to deflect outward through the triangular guide block.

5. The fixed chuck welding device for elbow tee according to claim 4, characterized in that: A reset chute (3914) is provided inside the welding wire conduit (38), a reset guide rod (3916) is movably connected to the bottom of the limit chuck (397), a reset spring (39161) is provided between the reset guide rod (3916) and the limit chuck (397), and the reset guide rod (3916) is slidably connected to the inside of the reset chute (3914); The reset chute (3914) includes a vertical chute and an inclined chute, a horizontal chute is provided between the bottom of the inclined chute and the vertical chute, a lifting step is provided between the top of the inclined chute and the vertical chute, and the horizontal chute smoothly connects the top of the inclined chute and the vertical chute.

6. The elbow tee fixed chuck welding device according to claim 5, characterized in that: The distance between the chuck limit block (3913) and the reset ring (39155) is adapted to the length of the guide limit ring (3911).

7. A fixed chuck welding process for elbow tee, according to the fixed chuck welding device for elbow tee according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: Material preparation: Cut two pipes, cut the nozzle of one pipe to make it arc-shaped, groove the middle of the other pipe, connect the two pipes and adjust the interface to complete the material preparation; Step 2: Distance measurement: Clamp and fix the G2 pipe horizontally, lift the G1 pipe, displace the G1 pipe interface 90 degrees to connect it to the G2 pipe, and measure the distance between the end of the G1 pipe and the G2 pipe as L1. Connect the G1 pipe and the G2 pipe interface, and measure the distance between the end of the G1 pipe and the G2 pipe as L2. Record the distance difference between L1 and L2 as L; Step 3: Initial welding: Control the lifting equipment to lift the G1 pipe and the G2 pipe cut to connect them, spot weld the two pipes, and complete the semi-finished assembly of the elbow tee; Step 4, fixed welding: Assemble the semi-finished tee to the fixed chuck (4) of the elbow tee fixed chuck welding device, adjust the cross lifting cantilever (1) to control the welding system (3) to dock the apex of the arc interface of the G1 pipe, control the fixed chuck (4) to rotate, and control the welding system (3) to follow the joint of the G1 pipe and the G2 pipe to perform fixed welding operation. The left and right movement distance of the welding system (3) is L.

8. The elbow tee fixed chuck welding process according to claim 7, characterized in that: In the step 3, during the spot welding process, the G1 pipe and the G2 pipe are spot welded in a "rice" shape, including the top point, bottom point and side transition weld points of the G1 pipe; In the step 4, the fixing chuck (4) is fixedly connected to the Gt end of the G1 pipe. In the initial state, the Gt, Gs and Gz ends of the G1 pipe and the G2 pipe are controlled to be at the same horizontal plane.

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