A welding device for producing evaporator pipe elbows

Abstract

The present invention relates to the technical field of welding equipment, and discloses a welding device for producing elbows of pipe fittings for evaporators, comprising a welding table, a cylinder is provided on the welding table, a flat plate is installed on the piston rod of the cylinder, a high-frequency coil is provided at the bottom of the flat plate, a pair of clamping blocks are provided on the welding table, a vertical plate is provided on the welding table, a guide groove is provided on the vertical plate, a guide rod is slidably installed in the guide groove, a movable plate is provided at the end of the guide rod away from the vertical plate, a cutter head is provided on the movable plate, a scraper is provided at the bottom end of the movable plate, the movable plate is connected to the cylinder by transmission, before the high-frequency coil welds the elbow, the cutter head impacts and cuts the curled edge of the straight pipe interface, and the scraper smoothes the curled edge of the straight pipe interface. The curled portion after smoothing fits with the elbow, so after the high-frequency coil heats the connection between the straight pipe and the elbow, the melted curled portion of the straight pipe is fully fused with the elbow, making the welding more firm, thereby improving the reliability of the device.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to a welding device for producing pipe elbows for evaporators. Background Art

[0002] An evaporator is a heat exchange device used to convert liquid into gas. It is widely used in refrigeration, chemical industry, food processing, pharmaceuticals and other fields. When processing the evaporator, the copper tube is first cut into multiple straight tubes of equal length, and several elbows are made through a bending process. In order for the elbows to be smoothly installed in the straight tubes, the interface of the straight tubes must be expanded to increase the inner diameter of the straight tubes. Then the elbows are installed in the straight tubes. Finally, a high-frequency welding machine is used to heat the connection between the straight tubes and the elbows so that the straight tubes and the elbows melt and become one.

[0003] After the straight pipe is expanded, the interface of the straight pipe will curl outward, resulting in insufficient contact between the curled portion of the straight pipe and the elbow. In the existing technology, the straight pipe and the elbow are directly welded, so that the curled portion of the straight pipe interface cannot be fully fused with the elbow after melting, ultimately resulting in a weak weld. Therefore, it does not meet the existing needs. In this regard, we propose a welding device for the production of evaporator pipe elbows. Summary of the Invention

[0004] The present invention provides a welding device for producing elbows of pipe fittings for evaporators. The device has the advantages of using a cutter head to impact the curled part of the straight pipe upward before welding, cutting the curled part, and smoothing the curled part with a scraper to make the curled part of the straight pipe contact with the elbow. After welding, the curled part and the elbow are fully fused, and the welding is more firm. It solves the problem mentioned in the above background technology that after the straight pipe is expanded, the interface of the straight pipe will curl outward, resulting in the curled part of the straight pipe and the elbow not being able to fully contact. In the prior art, the straight pipe and the elbow are directly welded, so that the curled part of the straight pipe interface cannot be fully fused with the elbow after melting, which ultimately leads to loose welding.

[0005] The present invention provides the following technical solution: a welding device for producing elbows for evaporator pipe fittings, comprising a welding platform, a cylinder provided on the welding platform, a high-frequency coil connected to the piston rod of the cylinder, a pair of clamping blocks provided on the welding platform, a vertical plate provided on the welding platform, a guide groove formed on the vertical plate, a guide rod slidably mounted in the guide groove, a movable plate provided on one end of the guide rod away from the vertical plate, a cutter head provided on the movable plate, and a scraper provided on the bottom end of the movable plate;

[0006] The movable plate is drivingly connected to the cylinder.

[0007] As an optional solution for the welding device for producing elbows of evaporator pipe fittings described in the present invention, a groove is provided on the movable plate, a plurality of the cutter heads are provided, and the plurality of the cutter heads are evenly distributed in the groove, and the scraper is installed directly below the groove.

[0008] As an optional solution of the welding device for producing elbows of evaporator pipe fittings according to the present invention, wherein: the guide groove includes an impact groove, a return groove and a No. 1 chute, the impact groove, the return groove and the No. 1 chute are connected in sequence, the return groove is hingedly connected to the No. 1 chute at one end thereof, a rotating plate is provided on the rotating plate, one end of the No. 1 torsion spring is connected to the rotating plate, and the other end of the rotating plate is connected to the vertical plate, a No. 2 limit block is further provided in the return groove, and the No. 2 limit block abuts against the rotating plate;

[0009] When the guide rod moves to the bottom end of the No. 1 inclined groove, the cutter head is located directly below the curled portion of the straight pipe. When the guide rod moves into the impact groove, the cutter head impacts and cuts the curled edge of the straight pipe interface.

[0010] As an optional solution of the welding device for producing elbows for evaporator pipe fittings according to the present invention, a flat plate is installed on the piston rod of the cylinder, a trigger rod is installed at the bottom of the flat plate, a pressure plate is hinged to the bottom end of the trigger rod, the pressure plate contacts the guide rod, a No. 2 torsion spring is hinged to the pressure plate, one end of the No. 2 torsion spring is connected to the pressure plate, and the other end of the No. 2 torsion spring is connected to the trigger rod, a No. 1 limit block is provided on the trigger rod, and the No. 1 limit block contacts the pressure plate;

[0011] When the pressure plate moves downward, the guide rod moves to the bottom end of the No. 1 inclined slot. When the pressure plate is separated from the guide rod, the guide rod enters the impact slot.

[0012] As an optional solution of the welding device for producing evaporator pipe elbows according to the present invention, an energy storage mechanism is provided on the side of the vertical plate, and the energy storage mechanism includes a positioning rod, the positioning rod is mounted on the side of the vertical plate, a push plate is slidably mounted on the positioning rod, the push plate is located at the bottom of the guide rod, and an energy storage spring is sleeved on the positioning rod, and the other end of the energy storage spring contacts the push plate;

[0013] When the guide rod moves into the impact groove, the push plate drives the cutter head to move upward quickly.

[0014] As an optional solution of the welding device for producing elbows of evaporator pipe fittings according to the present invention, wherein: a return mechanism is provided on the welding table, the return mechanism includes a fixed plate, the fixed plate is mounted on the welding table, a slide groove is provided on the fixed plate, a guide block is slidably mounted in the slide groove, a connecting rod is slidably inserted on the guide block, one end of the connecting rod is connected to the guide rod, and the other end of the connecting rod is mounted with a mounting plate, a return compression spring is sleeved on the connecting rod, one end of the return compression spring is connected to the mounting plate, and the other end of the return compression spring is connected to the guide block;

[0015] When the guide rod moves into the return groove, the connecting rod drives the guide rod to reset.

[0016] As an optional solution of the welding device for producing evaporator pipe elbows according to the present invention, wherein: the impact trough includes a vertical trough and a second chute, and the first chute, the vertical trough, the second chute and the return trough are connected in sequence;

[0017] When the guide rod moves into the No. 2 chute, the scraper clamps the straight pipe.

[0018] As an optional solution for the welding device for producing elbows of evaporator pipe fittings described in the present invention, wherein: a slide rail is provided on the welding table, a slider is slidably installed in the slide rail, a connecting plate is provided on the side of the slider away from the slide rail, a slide rod is slidably inserted on the connecting plate, the clamping block is fixedly connected to the slide rod, an extrusion spring is sleeved on the slide rod, and the other end of the extrusion spring is in contact with the clamping block.

[0019] As an optional solution of the welding device for producing evaporator pipe elbows according to the present invention, a limit plate is installed on the slide rail, a limit hole is provided on the limit plate, an L-shaped rod is slidably inserted into the connecting plate, a clamping block is provided at one end of the L-shaped rod close to the limit plate, a locking compression spring is sleeved on the L-shaped rod, and the other end of the locking compression spring is connected to the connecting plate;

[0020] When the connected plate moves upward, the clamping block is engaged with the limiting hole.

[0021] As an optional solution of the welding device for producing evaporator pipe elbows according to the present invention, an abutment block is provided at one end of the L-shaped rod away from the limiting plate, and the abutment block is located directly below the high-frequency coil. When the high-frequency coil moves downward, the limiting hole and the blocking block no longer engage.

[0022] A buffer spring for reducing the descending speed of the straight pipe is provided at the bottom of the sliding block.

[0023] The present invention has the following beneficial effects:

[0024] 1. The welding device for the production of elbows for evaporator pipe fittings. Before welding begins, the cylinder drives the flat plate, trigger rod, and pressure plate to move downward. At this time, the pressure plate contacts the guide rod, and the pressure plate drives the guide rod downward. The guide rod drives the push plate downward. The energy storage spring is compressed by the push plate to store energy. At the same time, the guide rod drives the moving plate, the cutter head, and the scraper to move downward. When the guide rod moves to the bottom of the No. 1 inclined slot, the cutter head is located below the curled part of the straight pipe. At this time, the guide rod separates from the pressure plate, and the guide rod enters the vertical slot, and the energy storage spring is released. The energy storage spring drives the guide rod to move up quickly through the push plate. At the same time, the guide rod drives the movable plate, the cutter head and the scraper to move up quickly. The cutter head cuts the curled part of the straight tube, and the scraper smoothes the cut curled part. The smoothed curled part fits with the elbow. Therefore, after the high-frequency coil heats the connection between the straight tube and the elbow, the melted curled part of the straight tube is fully fused with the elbow, making the welding more firm, reducing the possibility of air leakage during use at the connection between the straight tube and the elbow, and improving the reliability of the device.

[0025] 2. The welding device for producing elbows of pipe fittings for evaporators, when the guide rod is in the No. 2 inclined groove, the scraper drives the moving plate and the scraper to gradually press the straight pipe, and at the same time drives the straight pipe upward. When the straight pipe moves upward, the straight pipe drives the slider upward through the clamping block, the sliding rod, and the connecting plate, and at the same time the connecting plate drives the L-shaped rod and the clamping block to move upward, and the clamping block is engaged with the limit hole. At this time, the high-frequency coil is located below the connection position of the straight pipe and the elbow, and the high-frequency coil is in conflict with the interference block, and the interference block drives the L-shaped rod to move in the direction away from the limit plate. At this time, the limit hole and the clamping block are no longer engaged, and the slider, connecting plate, sliding rod, clamping block and straight pipe and elbow move downward under the action of gravity. At the same time, the high-frequency coil heats and welds the straight pipe and elbow, thereby realizing welding of the connection point of the straight pipe and elbow from bottom to top. During welding, the gravity of the molten pool helps gas and impurities to float up and be discharged, reducing pores and slag inclusions in the weld, improving welding quality, and increasing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is a schematic structural diagram of the cutter head installation of the present invention.

[0028] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0029] Figure 4 It is a schematic diagram of the cross-sectional structure of the guide groove of the present invention.

[0030] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure at point B in the middle.

[0031] Figure 6 It is a schematic diagram of the cross-sectional structure of the pressing plate of the present invention.

[0032] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at point C in the middle.

[0033] Figure 8 It is a structural schematic diagram of the return mechanism of the present invention.

[0034] Figure 9 This is a schematic structural diagram of the clamping block installation of the present invention.

[0035] Figure 10 It is a schematic diagram of the cross-sectional structure of the slide rail of the present invention.

[0036] In the figure: 101, welding table; 102, cylinder; 103, high-frequency coil; 104, clamping block; 105, flat plate; 2100, energy storage mechanism; 2200, return mechanism; 201, trigger rod; 202, vertical plate; 203, fixed plate; 204, mounting plate; 205, reset spring; 206, No. 1 limit block; 207, pressure plate; 208, push plate; 209, positioning rod; 210, energy storage spring; 211, moving plate; 212, cutter head; 213, scraper; 215, groove; 216, guide rod; 217, connecting rod; 218, guide groove ; 2180, impact groove; 2181, No. 1 inclined groove; 2182, vertical groove; 2183, No. 2 inclined groove; 2184, return groove; 219, turn plate; 220, No. 1 torsion spring; 221, No. 2 limit block; 222, No. 2 torsion spring; 223, slide groove; 224, guide block; 301, slide rail; 302, limit plate; 303, slider; 304, connecting plate; 305, buffer spring; 306, extrusion spring; 307, limit hole; 308, slide rod; 309, resistance block; 310, L-shaped rod; 311, block; 312, locking compression spring. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1: This example aims to solve the problem that after the straight pipe is expanded, the interface of the straight pipe will curl outward, resulting in the curled part of the straight pipe not being able to fully contact the elbow. In the prior art, the straight pipe and the elbow are directly welded, so that the curled part of the straight pipe interface cannot be fully fused with the elbow after melting, which ultimately leads to a weak weld. Please refer to Figures 1 to 10 A welding device for producing elbows of pipe fittings for evaporators includes a welding station 101, a cylinder 102 is provided on the welding station 101, a high-frequency coil 103 for heating the pipe is connected to the piston rod of the cylinder 102, a pair of clamping blocks 104 are provided on the welding station 101, a vertical plate 202 is provided on the welding station 101, a guide groove 218 is provided on the vertical plate 202, a guide rod 216 is slidably installed in the guide groove 218, a movable plate 211 is provided on the end of the guide rod 216 away from the vertical plate 202, a cutter head 212 is provided on the movable plate 211, and a cutting head 212 is provided on the movable plate 211. A scraper 213 is provided at the bottom end, and the movable plate 211 is connected to the cylinder 102 for transmission. Before the high-frequency coil 103 welds the elbow, the cutter head 212 impact-cuts the curled edge of the straight pipe interface, and the scraper 213 smoothes the curled edge of the straight pipe interface. After the straight pipe is expanded, the interface of the straight pipe will curl outward. At this time, if the scraper 213 is directly used to smooth the curled part, the required force is relatively large. Therefore, the cutter head 212 is first used to cut the curled part. Cutting helps to reduce the stress of the curled part, so that only less force is required for smoothing in the later stage.

[0039] It should be noted that in the prior art, a high-frequency current flows through the high-frequency coil 103, and the skin effect is used to concentrate the high-frequency current energy on the surface of the pipe to be welded. The proximity effect is used to control the position and range of the high-frequency current flow path, so that the straight pipe and the elbow interface are heated and melted in a very short time, thereby achieving docking. The specific structure and principle of the high-frequency coil 103 for achieving welding are well known to those skilled in the art and will not be elaborated here.

[0040] Among them, please refer to Figure 2 、 Figure 3 A groove 215 is provided on the movable plate 211, and a plurality of cutter heads 212 are provided, and the plurality of cutter heads 212 are evenly distributed in the groove 215, and the scraper 213 is installed directly below the groove 215. Therefore, when the cutter head 212 is located below the curled part of the straight tube, the cutter head 212 is distributed in a ring around the straight tube. When the cutter head 212 moves upward rapidly, the cutter head 212 cuts the curled part of the straight tube. After cutting, the curled part of the straight tube changes from a ring shape to a petal shape, so the scraper 213 can smooth the curled part with a smaller force.

[0041] Among them, please refer to Figure 4The guide groove 218 includes an impact groove 2180, a return groove 2184 and a No. 1 inclined groove 2181. The impact groove 2180, the return groove 2184 and the No. 1 inclined groove 2181 are connected in sequence. One end of the return groove 2184 connected to the No. 1 inclined groove 2181 is hinged with a rotating plate 219. A No. 1 torsion spring 220 is provided on the rotating plate 219. One end of the No. 1 torsion spring 220 is connected to the rotating plate 219, and the other end of the rotating plate 219 is connected to the vertical plate 202. A No. 2 limit block 2 is also provided in the return groove 2184. 21. When the No. 2 limit block 221 conflicts with the rotating plate 219 and the guide rod 216 moves to the bottom end of the No. 1 inclined groove 2181, the cutter head 212 is located directly below the curled portion of the straight pipe. When the guide rod 216 moves into the impact groove 2180, the cutter head 212 impacts and cuts the curled edge of the straight pipe interface. Under the action of the No. 2 limit block 221, the rotating plate 219 can only deflect in one direction. Under the action of the rotating plate 219, the guide rod 216 can only move in one direction from the return groove 2184 to the No. 1 inclined groove 2181.

[0042] It should be noted that the cutter head 212 is set to be an alloy cutter head. Since the high-frequency coil 103 will heat the metal, in order to avoid the influence of the high-frequency coil 103 on the cutter head 212, the cutter head 212 enters the return groove 2184 after cutting the curled part of the straight tube, and then moves to the connection between the return groove 2184 and the No. 1 bevel groove 2181. At this time, the cutter head 212 is located outside the high-frequency coil 103, thereby avoiding the influence of the high-frequency coil 103 on the cutter head 212.

[0043] For details, please refer to Figure 6 、 Figure 7 A trigger rod 201 is installed at the bottom of the flat plate 105, and a pressure plate 207 is hinged at the bottom end of the trigger rod 201. The pressure plate 207 is in conflict with the guide rod 216. A No. 2 torsion spring 222 is hinged on the pressure plate 207. One end of the No. 2 torsion spring 222 is connected to the pressure plate 207, and the other end of the No. 2 torsion spring 222 is connected to the trigger rod 201. A No. 1 limit block 206 is provided on the trigger rod 201, and the No. 1 limit block 206 is in conflict with the pressure plate 207. When the pressure plate 207 moves downward, the guide rod 216 moves to the bottom end of the No. 1 inclined slot 2181. When the pressure plate 207 separates from the guide rod 216, the guide rod 216 enters the impact slot 2180.

[0044] It should be noted that after the pressure plate 207 is separated from the guide rod 216, the guide rod 216 enters the impact groove 2180, and then the guide rod 216 enters the return groove 2184. At this time, the guide rod 216 is located above the pressure plate 207. After welding is completed, the pressure plate 207 moves upward and resets under the drive of the cylinder 102. In order to avoid the guide rod 216 blocking the reset of the pressure plate 207, the pressure plate 207 is hinged to the bottom of the trigger rod 201. Therefore, when the pressure plate 207 moves upward and resets under the drive of the cylinder 102, the pressure plate 207 conflicts with the guide rod 216 and flips downward. When the pressure plate 207 completes its reset, the pressure plate 207 returns to the top of the guide rod 216 and waits for the next welding.

[0045] Also, please refer to Figure 6 An energy storage mechanism 2100 is provided on the side of the vertical plate 202. The energy storage mechanism 2100 includes a positioning rod 209. The positioning rod 209 is installed on the side of the vertical plate 202. A push plate 208 is slidably installed on the positioning rod 209. The push plate 208 is located at the bottom of the guide rod 216. An energy storage spring 210 is sleeved on the positioning rod 209. The other end of the energy storage spring 210 is in contact with the push plate 208. When the guide rod 216 moves to the impact groove 2180, the push plate 208 drives the cutter head 212 to move up quickly.

[0046] Also, please refer to Figure 7 A return mechanism 2200 is provided on the soldering station 101, and the return mechanism 2200 includes a fixed plate 203, which is installed on the soldering station 101, and a slide groove 223 is provided on the fixed plate 203. A guide block 224 is slidably installed in the slide groove 223, and a connecting rod 217 is slidably inserted on the guide block 224. One end of the connecting rod 217 is connected to the guide rod 216, and the other end of the connecting rod 217 is installed with a mounting plate 204. A reset compression spring 205 is sleeved on the connecting rod 217, and one end of the reset compression spring 205 is connected to the mounting plate 204, and the other end of the reset compression spring 205 is connected to the guide block 224. When the guide rod 216 moves to the return groove 2184, the connecting rod 217 drives the guide rod 216 to reset.

[0047] In this embodiment: before starting welding, the cylinder 102 drives the flat plate 105, the trigger rod 201, and the pressure plate 207 to move downward. At this time, the pressure plate 207 conflicts with the guide rod 216, and the pressure plate 207 drives the guide rod 216 to move downward. The guide rod 216 drives the push plate 208 to move downward. The energy storage spring 210 is compressed by the push plate 208 to store energy. At the same time, the guide rod 216 drives the movable plate 211, the cutter head 212 and the scraper 213 to move downward. When the guide rod 216 moves to the bottom end of the No. 1 inclined groove 2181, the cutter head 212 is located below the curling part of the straight tube. At this time, the guide rod 216 separates from the pressure plate 207, and the guide rod 216 enters the vertical groove 2 In 182, the energy storage spring 210 is released, and the energy storage spring 210 drives the guide rod 216 to move up quickly through the push plate 208. At the same time, the guide rod 216 drives the movable plate 211, the cutter head 212 and the scraper 213 to move up quickly. The cutter head 212 cuts the curled part of the straight tube, and the scraper 213 smoothes the cut curled part. The smoothed curled part fits with the elbow. Therefore, after the high-frequency coil 103 heats the connection between the straight tube and the elbow, the melted curled part of the straight tube is fully fused with the elbow, making the welding more firm, reducing the possibility of air leakage during use at the connection between the straight tube and the elbow, and improving the reliability of the device.

[0048] Example 2: This example aims to solve the problem of welding the connection point of the straight pipe and the elbow from bottom to top. Under the action of gravity of the molten pool, it helps the gas and impurities float up and discharge, reduces the porosity and slag inclusion in the weld, and improves the welding quality. This example is an improvement made on the basis of Example 1. For details, please refer to Figures 1 to 10 The impact groove 2180 includes a vertical groove 2182 and a second inclined groove 2183. The first inclined groove 2181, the vertical groove 2182, the second inclined groove 2183 and the return groove 2184 are connected in sequence. When the guide rod 216 moves to the second inclined groove 2183, the scraper 213 clamps the straight pipe.

[0049] Please note that, please refer to Figure 4 When the guide rod 216 moves in the vertical groove 2182, the cutter head 212 cuts the curled part of the straight tube, and the scraper 213 smoothes the curled part. When the guide rod 216 is in the second inclined groove 2183, the scraper 213 drives the moving plate 211 and the scraper 213 to gradually press the straight tube, and at the same time drive the straight tube to move upward.

[0050] Also, please refer to Figure 9 、 Figure 10When the locking plate 304 is unlocked, the locking plate 308 is unlocked and the locking plate 304 is unlocked, so that the master block 304 can be unlocked when the master block 304 is unlocked.

[0051] In addition, a resistance block 309 is provided at one end of the L-shaped rod 310 away from the limit plate 302. The resistance block 309 is located directly below the high-frequency coil 103. When the high-frequency coil 103 moves downward, the limit hole 307 and the block 311 are no longer engaged. A buffer spring 305 is provided at the bottom of the slider 303 to reduce the descending speed of the straight tube.

[0052] In this embodiment: when the guide rod 216 is in the second chute 2183, the scraper 213 drives the movable plate 211 and the scraper 213 to gradually press the straight pipe, and at the same time drives the straight pipe to move upward. When the straight pipe moves upward, the straight pipe drives the slider 303 to move upward through the clamping block 104, the slide bar 308, and the connecting plate 304. At the same time, the connecting plate 304 drives the L-shaped rod 310 and the clamping block 311 to move upward. The clamping block 311 is engaged with the limiting hole 307. At this time, the high-frequency coil 103 is located below the connection position between the straight pipe and the elbow, and the high-frequency coil 103 is in contact with the friction block 307. 09 conflicts, and the conflict block 309 drives the L-shaped rod 310 to move toward the direction of the principle limit plate 302. At this time, the limit hole 307 and the clamping block 311 are no longer engaged, and the slider 303, the connecting plate 304, the slide bar 308, the clamping block 104 and the straight pipe and the elbow move downward under the action of gravity. At the same time, the high-frequency coil 103 heats and welds the straight pipe and the elbow, thereby realizing the welding of the connection point of the straight pipe and the elbow from bottom to top. During welding, the gravity of the molten pool helps gas and impurities to float up and be discharged, reducing pores and slag inclusions in the weld and improving welding quality.

[0053] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A welding device for producing an evaporator pipe elbow, comprising a welding platform (101), a cylinder (102) provided on the welding platform (101), a high-frequency coil (103) connected to the piston rod of the cylinder (102), and a pair of clamping blocks (104) provided on the welding platform (101), characterized in that: The welding station (101) is provided with a vertical plate (202), a guide groove (218) is provided on the vertical plate (202), a guide rod (216) is slidably installed in the guide groove (218), a movable plate (211) is provided at one end of the guide rod (216) away from the vertical plate (202), a cutter head (212) is provided on the movable plate (211), and a scraper (213) is provided at the bottom end of the movable plate (211); The movable plate (211) is in driving connection with the cylinder (102); The guide groove (218) includes an impact groove (2180), a return groove (2184) and a first inclined groove (2181), wherein the impact groove (2180), the return groove (2184) and the first inclined groove (2181) are connected in sequence, and one end of the return groove (2184) connected to the first inclined groove (2181) is hingedly connected to a rotating plate (219), and a first torsion spring (220) is provided on the rotating plate (219), one end of the first torsion spring (220) is connected to the rotating plate (219), and the other end of the rotating plate (219) is connected to the vertical plate (202), and a second limiting block (221) is further provided in the return groove (2184), and the second limiting block (221) is in conflict with the rotating plate (219); When the guide rod (216) moves to the bottom end of the No. 1 inclined groove (2181), the cutter head (212) is located directly below the curled portion of the straight pipe. When the guide rod (216) moves into the impact groove (2180), the cutter head (212) impacts and cuts the curled edge of the straight pipe interface.

2. The welding device for producing elbows for evaporator pipe fittings according to claim 1, characterized in that: A groove (215) is provided on the movable plate (211), a plurality of the cutter heads (212) are provided, and the plurality of the cutter heads (212) are evenly distributed in the groove (215), and the scraper (213) is installed directly below the groove (215).

3. The welding device for producing elbows for evaporator pipe fittings according to claim 1, characterized in that: A flat plate (105) is mounted on the piston rod of the cylinder (102), a trigger rod (201) is mounted on the bottom of the flat plate (105), a pressure plate (207) is hinged to the bottom end of the trigger rod (201), the pressure plate (207) is in contact with the guide rod (216), a second torsion spring (222) is hinged to the pressure plate (207), one end of the second torsion spring (222) is connected to the pressure plate (207), and the other end of the second torsion spring (222) is connected to the trigger rod (201), a first limit block (206) is provided on the trigger rod (201), and the first limit block (206) is in contact with the pressure plate (207); When the pressure plate (207) moves downward, the guide rod (216) moves to the bottom end of the first inclined slot (2181), and when the pressure plate (207) and the guide rod (216) separate, the guide rod (216) enters the impact slot (2180).

4. The welding device for producing elbows for evaporator pipe fittings according to claim 1, characterized in that: An energy storage mechanism (2100) is provided on the side of the vertical plate (202), and the energy storage mechanism (2100) includes a positioning rod (209), the positioning rod (209) is installed on the side of the vertical plate (202), a push plate (208) is slidably installed on the positioning rod (209), the push plate (208) is located at the bottom of the guide rod (216), and an energy storage spring (210) is sleeved on the positioning rod (209), and the other end of the energy storage spring (210) is in contact with the push plate (208); When the guide rod (216) moves into the impact groove (2180), the push plate (208) drives the cutter head (212) to move upward quickly.

5. The welding device for producing elbows for evaporator pipe fittings according to claim 1, characterized in that: The soldering station (101) is provided with a return mechanism (2200), the return mechanism (2200) includes a fixed plate (203), the fixed plate (203) is installed on the soldering station (101), a slide groove (223) is provided on the fixed plate (203), a guide block (224) is slidably installed in the slide groove (223), a connecting rod (217) is slidably inserted on the guide block (224), one end of the connecting rod (217) is connected to the guide rod (216), the other end of the connecting rod (217) is installed with a mounting plate (204), a return pressure spring (205) is sleeved on the connecting rod (217), one end of the return pressure spring (205) is connected to the mounting plate (204), and the other end of the return pressure spring (205) is connected to the guide block (224); When the guide rod (216) moves into the return groove (2184), the connecting rod (217) drives the guide rod (216) to reset.

6. The welding device for producing elbows for evaporator pipe fittings according to claim 1, characterized in that: The impact trough (2180) comprises a vertical trough (2182) and a second chute (2183), and the first chute (2181), the vertical trough (2182), the second chute (2183) and the return trough (2184) are connected in sequence; When the guide rod (216) moves into the second chute (2183), the scraper (213) clamps the straight pipe.

7. The welding device for producing elbows for evaporator pipe fittings according to claim 1, characterized in that: A slide rail (301) is provided on the soldering station (101), a slider (303) is slidably installed in the slide rail (301), a connecting plate (304) is provided on the side of the slider (303) away from the slide rail (301), a slide rod (308) is slidably plugged into the connecting plate (304), the clamping block (104) is fixedly connected to the slide rod (308), and an extrusion spring (306) is sleeved on the slide rod (308), and the other end of the extrusion spring (306) contacts the clamping block (104).

8. The welding device for producing elbows for evaporator pipe fittings according to claim 7, characterized in that: A limit plate (302) is installed on the slide rail (301), a limit hole (307) is provided on the limit plate (302), an L-shaped rod (310) is slidably plugged into the connecting plate (304), a clamping block (311) is provided at one end of the L-shaped rod (310) close to the limit plate (302), a locking compression spring (312) is sleeved on the L-shaped rod (310), and the other end of the locking compression spring (312) is connected to the connecting plate (304); When the connected plate (304) moves upward, the clamping block (311) engages with the limiting hole (307).

9. The welding device for producing elbows for evaporator pipe fittings according to claim 8, characterized in that: An end of the L-shaped rod (310) away from the limiting plate (302) is provided with a resisting block (309), and the resisting block (309) is located directly below the high-frequency coil (103). When the high-frequency coil (103) moves downward, the limiting hole (307) and the clamping block (311) are no longer engaged. A buffer spring (305) is provided at the bottom of the slider (303) for reducing the descending speed of the straight tube.

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