Heat exchanger pipe fitting tapping mechanism

Abstract

The invention relates to the technical field of pipe fitting machining, in particular to a heat exchanger pipe fitting tapping mechanism which comprises a profile rack, a taking and placing unit, a lifting unit, a positioning unit and a three-axis tapping machine, the taking and placing unit is fixedly arranged at the top of the profile rack, and the lifting unit is fixedly arranged at the top of the profile rack and located at the bottom of the taking and placing unit; the positioning units are fixedly arranged on the top of the profile rack in a front-back distribution mode. Three heat exchanger pipe fittings are conveyed to a machining station each time through the taking and placing unit, the three heat exchanger pipe fittings are synchronously tapped through the front three-axis tapping machine and the rear three-axis tapping machine at the same time, the machining capacity is sufficient, the machining efficiency is high, and after tapping is not completed, the taking and placing unit conveys the three heat exchanger pipe fittings to the machining station again. And the three machined heat exchanger pipe fittings are pushed to the discharging station from the machining station, automatic discharging after machining is completed, the overall machining automation degree is high, and the labor cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe fitting processing, and specifically relates to a tapping mechanism for heat exchanger pipe fittings. Background Art

[0002] A heat pipe heat exchanger with heat pipes as heat transfer units in a tubular heat exchanger is a new type of high-efficiency heat exchanger, which is composed of a shell, heat pipes and partitions. As the main heat transfer element, a heat pipe is a heat transfer device with high thermal conductivity. It is a vacuum container, and its basic components are a shell, a wick and a working fluid. After evacuating the shell and filling it with an appropriate amount of working fluid, sealing the shell forms a heat pipe. When heat is supplied to one end of it by a heat source, the working fluid absorbs heat from the heat source and evaporates and vaporizes. The steam carrying the latent heat is transmitted at high speed to the other end of the shell under the action of pressure difference, releases the latent heat to the cold source and condenses. The condensate returns to the hot end and boils and vaporizes again. Such a cycle is repeated, and heat is continuously transferred from the hot end to the cold end. The heat pipes of the tubular heat exchanger usually need to be tapped for installation and combination with other components;

[0003] According to a Chinese patent with the application publication number 202210881660.X, a pipe fitting tapping machine is disclosed, which realizes the automatic feeding, conveying, clamping and tapping of pipe fittings; realizes automated processing, and has a relatively high processing efficiency. Although the two ends of the key can be synchronously processed by this pipe fitting tapping machine each time, each time it is only limited to processing a single pipe fitting. Although the processing efficiency is improved compared with manual processing, it is still not fast enough. If multiple pipe fittings can be synchronously processed each time, the efficiency will be greatly improved. For this reason, we propose a tapping mechanism for heat exchanger pipe fittings to solve the above technical problems. Summary of the Invention

[0004] The present invention provides the following technical solutions: A tapping mechanism for heat exchanger pipe fittings, comprising: a profile frame; a picking and placing unit fixedly arranged on the top of the profile frame for automatically loading and unloading heat exchanger pipe fittings; a lifting unit fixedly arranged on the top of the profile frame and located at the bottom of the picking and placing unit, the lifting unit being used for lifting and supporting heat exchanger pipe fittings; a positioning unit fixedly arranged on the top of the profile frame in a front-back distribution and located between the bottom of the picking and placing unit and the top of the lifting unit, the positioning unit and the lifting unit positioning the heat exchanger pipe fittings; a three-axis tapping machine symmetrically arranged on the top of the profile frame in the front-back direction.

[0005] As a preferred embodiment of the present invention, the picking and placing unit includes: a square pipe frame fixedly installed on the top of the profile frame; a connecting plate fixedly installed at the end of the square pipe frame; a flat push cylinder fixedly installed at one end of the square pipe frame away from the connecting plate; a dragging plate fixedly installed at the end of the output rod of the flat push cylinder; a translation plate fixedly installed at one end of the dragging plate away from the flat push cylinder; a lifting cylinder fixedly installed on one side of the translation plate away from the dragging plate; a shifting block fixedly installed at the bottom of the output rod of the lifting cylinder; a sleeper rail fixedly installed on the top of the profile frame in a front-back distribution; a smooth rod fixedly installed at the right end of the connecting plate in a front-back distribution, and the translation plate is slidably installed on the outer walls of the front and back two smooth rods.

[0006] As a preferred embodiment of the present invention, the lifting unit includes: an aluminum profile frame located on the top of the profile frame; bottom angle plates fixedly installed at both ends of the front part and both ends of the rear part of the aluminum profile frame; bottom guide rods fixedly installed between the left and right two bottom angle plates in an up-down distribution; bottom outer pressing blocks slidably installed around the up and down two bottom guide rods in a left-right distribution; bottom outer sleepers respectively fixedly installed on the tops of the two bottom outer pressing blocks; bottom outer arc grooves opened at the top of one end where the two bottom outer sleepers are close to each other; bottom inner pressing blocks slidably installed around the up and down two bottom guide rods in a left-right distribution and located between the left and right two bottom outer pressing blocks; bottom inner sleepers respectively fixedly installed on the tops of the two bottom inner pressing blocks; bottom inner arc grooves symmetrically distributed on the top left corner and top right corner of the tops of the bottom inner sleepers, and the specifications of the bottom inner arc grooves correspond to the specifications of the bottom outer arc grooves.

[0007] As a preferred embodiment of the present invention, the lifting unit further includes: lifting rods fixedly installed at the left end and right end of the bottom of the aluminum profile frame in a front-back distribution, and there are four in total. The four lifting rods slide through the interior of the profile frame; a lifting seat slidably installed on the lower parts of the outer walls of the left and right two lifting rods; lifting cylinders fixedly installed on the top of the profile frame in a front-back distribution, and their output rods movably penetrate through the interior of the profile frame; extrusion vertical plates fixedly installed on the sides of the lifting seat in a left-right distribution; wedge surfaces opened on the upper parts of the opposite surfaces of the left and right two extrusion vertical plates; L-shaped cantilevers symmetrically distributed and fixedly installed on the outer surfaces of the two bottom outer pressing blocks; guide wheels rotatably installed on the L-shaped cantilevers through axle pins and located at one end of the L-shaped cantilevers away from the bottom outer pressing blocks, and the positions of the guide wheels correspond to the positions of the wedge surfaces; buffer springs sleeved around the lifting rods and fixedly installed between the bottom of the profile frame and the top of the lifting seat.

[0008] As a preferred embodiment of the present invention, the lifting unit further includes: a push head fixedly installed on the opposite surfaces of the left and right two bottom outer pressing blocks and extending to the top of the bottom outer sleeper; a U-shaped groove opened on the top of the push head, and the inner diameter of the U-shaped groove is larger than the outer diameter of the top guide rod.

[0009] As a preferred embodiment of the present invention, the lifting unit further includes: a bottom return spring sleeved around the outer periphery of the top guide rod and fixedly installed between the bottom outer pressure block and the bottom inner pressure block; a first bottom positioning rod fixedly installed on the outer surface of the bottom angle plate; a second bottom positioning rod fixedly installed on the side surface of the bottom outer pressure block away from the aluminum profile frame, and on the same side as the first bottom positioning rod; a bottom tension spring fixedly installed between the first bottom positioning rod and the second bottom positioning rod.

[0010] As a preferred embodiment of the present invention, the positioning unit includes: top angle plates fixedly installed on the side walls of the square pipe frame in a left-right distribution; top guide rods fixedly installed between the left and right top angle plates in an up-down distribution and having the same specifications as the bottom guide rods; top outer pressure blocks fixedly installed around the outer peripheries of the upper and lower top guide rods in a left-right distribution; top outer sleepers fixedly installed at the bottoms of the top outer pressure blocks; top outer arc grooves opened at the lower ends of the side surfaces of the left and right top outer sleepers close to each other; top inner pressure blocks slidably installed around the outer peripheries of the upper and lower top guide rods in a left-right distribution and located between the left and right top outer pressure blocks; top inner sleepers fixedly installed at the bottoms of the top inner pressure blocks; top inner arc grooves symmetrically opened at both ends of the bottoms of the top inner sleepers.

[0011] As a preferred embodiment of the present invention, the positioning unit further includes: a top return spring sleeved around the outer periphery of the top guide rod and fixedly installed between the top outer pressure block and the top inner pressure block; a first top positioning rod fixedly installed on the top of the top angle plate; a second top positioning rod fixedly installed on the top of the top outer pressure block; a top tension spring fixedly installed between the first top positioning rod and the second top positioning rod.

[0012] As a preferred embodiment of the present invention, the position and specifications of the top outer pressure block are the same as those of the bottom outer pressure block, the position and specifications of the top inner pressure block are the same as those of the bottom inner pressure block, the specifications of the top outer arc groove and the top inner arc groove are adapted to the outer wall specifications of the heat exchanger pipe fittings, and the specifications of the bottom outer arc groove and the bottom inner arc groove are adapted to the outer wall specifications of the heat exchanger pipe fittings.

[0013] As a preferred embodiment of the present invention, a pre-storage groove is opened at the left end of the top of the sleeper rail, three positioning arc grooves are opened in the middle area of the top of the sleeper rail at equal left-right distances, the specifications of the positioning arc grooves are adapted to the outer wall specifications of the heat exchanger pipe fittings, and an inclined guide surface is opened at the right end of the top of the sleeper rail.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In the present invention, each time the picking and placing unit transports three heat exchanger pipe fittings to the processing station, the front and rear two three-axis tapping machines simultaneously tap the three heat exchanger pipe fittings synchronously, with sufficient processing capacity and high processing efficiency. After tapping is completed, the picking and placing unit transports the three heat exchanger pipe fittings to the processing station again, and pushes the three processed heat exchanger pipe fittings from the processing station to the unloading station, completing automatic unloading after processing. The overall processing automation degree is relatively high, saving labor costs.

[0015] 2. In the present invention, after the lifting unit lifts the three lifting units, in cooperation with the use of the positioning unit, the positioning effect of the three positioning units is simultaneously achieved, ensuring the stability of the three positioning units during the tapping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the right front view of the present invention; Figure 2 is a schematic structural diagram of the top view of the present invention; Figure 3 is a schematic structural diagram of the picking and placing unit in the present invention; Figure 4 In the present invention Figure 1 partial structural schematic diagram; Figure 5 is a schematic structural diagram of the positioning unit in the present invention; Figure 6 is a schematic structural diagram of the lifting unit in the present invention; Figure 7 In the present invention Figure 3 amplified structural schematic diagram of part A; Figure 8 In the present invention Figure 6 amplified structural schematic diagram of part B.

[0017] In the figure: 100, profile frame; 200, picking and placing unit; 201, square tube rack; 202, connecting plate; 203, horizontal pushing cylinder; 204, dragging plate; 205, translation plate; 206, lifting cylinder; 207, shifting block; 208, sleeper rail; 2081, pre-storage groove; 2082, positioning arc groove; 2083, inclined guide surface; 209, polished rod; 300, lifting unit; 301, aluminum profile frame; 302, bottom corner plate; 303, bottom guide rod; 304, bottom external pressing block; 305, bottom external sleeper; 306, bottom external arc groove; 307, bottom internal pressing block; 308, bottom internal sleeper; 309, bottom internal arc groove; 3010, lifting rod; 3011, lifting seat; 3012, lifting cylinder; 3013, extrusion vertical plate; 3014, wedge surface; 3015, L-shaped cantilever; 3016, guide wheel; 3017, buffer spring; 3018, pushing head; 3019, U-shaped groove; 3021, bottom reset spring; 3022, bottom positioning rod 1; 3023, bottom positioning rod 2; 3024, bottom tension spring; 400, positioning unit; 401, top corner plate; 402, top guide rod; 403, top external pressing block; 404, top external sleeper; 405, top external arc groove; 406, top internal pressing block; 407, top internal sleeper; 408, top internal arc groove; 409, top reset spring; 4010, top positioning rod 1; 4011, top positioning rod 2; 4012, top tension spring; 500, three-axis tapping machine. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 to 8 , the technical solutions provided by the present invention specifically include the following embodiments: A tapping mechanism for heat exchanger pipe fittings includes a profile frame 100, a picking and placing unit 200, a lifting unit 300, a positioning unit 400 and a three-axis tapping machine 500. The picking and placing unit 200 is fixedly arranged on the top of the profile frame 100 and is used for automatically loading and unloading heat exchanger pipe fittings. The lifting unit 300 is fixedly arranged on the top of the profile frame 100 and is located at the bottom of the picking and placing unit 200. The lifting unit 300 is used for lifting and supporting heat exchanger pipe fittings. The positioning unit 400 is fixedly arranged on the top of the profile frame 100 in a front-back distribution and is located between the bottom of the picking and placing unit 200 and the top of the lifting unit 300. The positioning unit 400 and the lifting unit 300 position the heat exchanger pipe fittings. The three-axis tapping machine 500 is symmetrically arranged on the top of the profile frame 100 in the front-back direction.

[0020] Furthermore, specifically referring to Figure 1 , Figure 3 and Figure 4 shown as follows: The picking and placing unit 200 includes a square pipe frame 201, a connecting plate 202, a flat push cylinder 203, a dragging plate 204, a translation plate 205, a lifting cylinder 206, a dial block 207, a sleeper rail 208 and a smooth rod 209. The square pipe frame 201 is fixedly installed on the top of the profile frame 100. The connecting plate 202 is fixedly installed at the end of the square pipe frame 201. The flat push cylinder 203 is fixedly installed at one end of the square pipe frame 201 away from the connecting plate 202. The dragging plate 204 is fixedly installed at the end of the output rod of the flat push cylinder 203. The translation plate 205 is fixedly installed at one end of the dragging plate 204 away from the flat push cylinder 203. The lifting cylinder 206 is fixedly installed on one side surface of the translation plate 205 away from the dragging plate 204. The dial block 207 is fixedly installed at the bottom of the output rod of the lifting cylinder 206. The sleeper rails 208 are fixedly installed on the top of the profile frame 100 in the front and back distribution. The smooth rods 209 are fixedly installed at the right end of the connecting plate 202 in the front and back distribution. The translation plate 205 is slidably installed on the outer walls of the two front and back smooth rods 209. A pre-storage groove 2081 is opened at the left end of the top of the sleeper rail 208. Three positioning arc grooves 2082 are opened in the middle area of the top of the sleeper rail 208 at equal intervals from left to right. The specifications of the positioning arc grooves 2082 are adapted to the outer wall specifications of the heat exchanger pipe fittings. An inclined guide surface 2083 is opened at the right end of the top of the sleeper rail 208.

[0021] Specifically, the heat exchanger pipes are transported to the left ends of the tops of the front and rear sleeper rails 208 at intervals through the conveying equipment, so that the heat exchanger pipes are supported on the tops of the front and rear pre-storage grooves 2081, and the heat exchanger pipes are blocked by the inclined surface at the right end of the pre-storage groove 2081 and will not roll to the right. Then, the output rod of the lifting cylinder 206 pushes the shift block 207 downward to move, so that the shift block 207 moves down to the left side of the third heat exchanger pipe from the rightmost end of the top of the pre-storage groove 2081. Subsequently, the output rod of the horizontal push cylinder 203 retracts, and drives the translation plate 205 to move along the front and rear light rods 209 toward the direction close to the horizontal push cylinder 203 through the drag plate 204. At this time, the translation plate 205 is connected to the lifting cylinder 206. The shifting block 207 is driven to move together, and the three heat exchanger pipes at the rightmost end of the top of the pre-storage groove 2081 are shifted to the right. The heat exchanger pipes roll along the top surface of the pre-storage groove 2081 and enter the three positioning arc grooves 2082 in turn. Then, the output rod of the horizontal push cylinder 203 stops moving. At this time, the three positioning arc grooves 2082 respectively limit the three heat exchanger pipes to prevent the three heat exchanger pipes from continuing to roll. Then, the conveying equipment continues to transport the three conveying equipment to the top of the front and rear pre-storage grooves 2081 for processing. At the same time, the output rod of the lifting cylinder 206 drives the shifting block 207 to move upward. Then, the output rod of the horizontal push cylinder 203 extends through the drag plate 204 to push the translation plate 20 5 moves along the front and rear polished rods 209 in the direction away from the push cylinder 203, and drives the shifting block 207 to move together through the lifting cylinder 206. Since the output rod of the lifting cylinder 206 drives the shifting block 207 to move upward, when the shifting block 207 moves in the direction away from the push cylinder 203, the bottom of the shifting block 207 will not contact the top of the heat exchanger pipe fitting at the top of the pre-storage groove 2081, so that the heat exchanger pipe fitting at the top of the pre-storage groove 2081 will not roll in the opposite direction. When the tapping process of the three heat exchanger pipe fittings is completed, the output rod of the lifting cylinder 206 pushes the shifting block 207 downward to move, so that the shifting block 207 moves down to the third heat exchanger pipe fitting located at the rightmost end of the top of the pre-storage groove 2081. On the left side, then, the output rod of the push cylinder 203 retracts, and drives the translation plate 205 to move along the front and rear two light rods 209 toward the push cylinder 203 through the drag plate 204. At this time, the translation plate 205 drives the shift block 207 to move together through the connection action of the lifting cylinder 206, and shifts the three heat exchanger pipe fittings at the rightmost end of the top of the pre-storage groove 2081 to the right. The heat exchanger pipe fittings roll along the top surface of the pre-storage groove 2081 and enter the three positioning arc grooves 2082 in turn, and push the heat exchanger pipe fittings that have been tapped in the previous step to the right, and push the three processed heat exchanger pipe fittings to the top of the inclined guide surface 2083, and finally roll to the right along the top of the inclined guide surface 2083 to complete the unloading after tapping.

[0022] For further details, please refer to Figure 4 , Figure 6 andFigure 7 As shown: The lifting unit 300 includes an aluminum profile frame 301, bottom corner plates 302, bottom guide rods 303, bottom outer pressure blocks 304, bottom outer sleepers 305, bottom outer arc grooves 306, bottom inner pressure blocks 307, bottom inner sleepers 308, bottom inner arc grooves 309, lifting rods 3010, lifting seats 3011, lifting cylinders 3012, extrusion vertical plates 3013, wedge surfaces 3014, L-shaped cantilever arms 3015, guide wheels 3016 and buffer springs 3017. The aluminum profile frame 301 is located at the top of the profile rack 100. The bottom corner plates 302 are fixedly installed at both ends of the front part and both ends of the rear part of the aluminum profile frame 301. The bottom guide rods 303 are vertically distributed and fixedly installed between the left and right bottom corner plates 302. The bottom outer pressure blocks 304 are horizontally distributed and slidably installed around the upper and lower bottom guide rods 303. The bottom outer sleepers 305 are respectively fixedly installed at the tops of the two bottom outer pressure blocks 304. The bottom outer arc grooves 306 are opened at the top of one end where the two bottom outer sleepers 305 are close to each other. The bottom inner pressure blocks 307 are horizontally distributed and slidably installed around the upper and lower bottom guide rods 303 and are located between the left and right bottom outer pressure blocks 304. The bottom inner sleepers 308 are respectively fixedly installed at the tops of the two bottom inner pressure blocks 307. The bottom inner arc grooves 309 are symmetrically distributed horizontally at the upper left corner and upper right corner of the tops of the bottom inner sleepers 308. The specifications of the bottom inner arc grooves 309 correspond to the specifications of the bottom outer arc grooves 306. The lifting rods 3010 are horizontally distributed and fixedly installed at the left end and right end of the bottom of the aluminum profile frame 301, and there are four in total. The four lifting rods 3010 slide through the interior of the profile rack 100. The lifting seats 3011 are slidably installed at the lower parts of the outer walls of the left and right lifting rods 3010. The lifting cylinders 3012 are horizontally distributed and fixedly installed at the top of the profile rack 100, and their output rods movably penetrate through the interior of the profile rack 100. The extrusion vertical plates 3013 are horizontally distributed and fixedly installed on the sides of the lifting seats 3011. The wedge surfaces 3014 are opened at the upper parts of the opposite surfaces of the left and right extrusion vertical plates 3013. The L-shaped cantilever arms 3015 are symmetrically distributed horizontally and fixedly installed on the outer surfaces of the two bottom outer pressure blocks 304. The guide wheels 3016 are rotatably installed on the L-shaped cantilever arms 3015 through pins and are located at one end of the L-shaped cantilever arms 3015 away from the bottom outer pressure blocks 304. The positions of the guide wheels 3016 correspond to the positions of the wedge surfaces 3014. The buffer springs 3017 are sleeved around the lifting rods 3010 and are fixedly installed between the bottom of the profile rack 100 and the top of the lifting seats 3011.

[0023] Specifically, after three heat exchanger pipe fittings enter the three positioning arc grooves 2082, the output rods of the front and rear lifting cylinders 3012 retract, pushing the front and rear lifting seats 3011 upward. Further, under the connection of the buffer springs 3017, the lifting rods 3010 move upward, driving the aluminum profile frame 301, the bottom angle plates 302, the bottom guide rods 303, the bottom outer pressing blocks 304, the bottom outer sleepers 305, the bottom outer arc grooves 306, the bottom inner pressing blocks 307, the bottom inner sleepers 308, the bottom inner arc grooves 309, the extrusion vertical plates 3013, the wedge surfaces 3014, the L-shaped cantilevers 3015, the guide wheels 3016, and the push heads 3018 upward. At the same time, the bottom outer arc grooves 306 and the bottom inner arc grooves 309 move upward, lifting the three heat exchanger pipe fittings located inside the three positioning arc grooves 2082 to the tapping station, and then the front and rear two-axis tapping machines 500 simultaneously tap the two ends of the three heat exchanger pipe fittings.

[0024] Further, specifically refer to Figure 4 , Figure 5 and Figure 6 as shown: The lifting unit 300 further includes push heads 3018, U-shaped grooves 3019, bottom return springs 3021, bottom positioning rods one 3022, bottom positioning rods two 3023, and bottom tension springs 3024. The push heads 3018 are fixedly installed on the opposite surfaces of the left and right bottom outer pressing blocks 304 and extend to the top of the bottom outer sleepers 305. The U-shaped grooves 3019 are opened on the tops of the push heads 3018. The inner diameter of the U-shaped grooves 3019 is larger than the outer diameter of the top guide rods 402. The bottom return springs 3021 are sleeved around the top guide rods 402 and are fixedly installed between the bottom outer pressing blocks 304 and the bottom inner pressing blocks 307. The bottom positioning rods one 3022 are fixedly installed on the outer surfaces of the bottom angle plates 302. The bottom positioning rods two 3023 are fixedly installed on the side surfaces of the bottom outer pressing blocks 304 away from the aluminum profile frame 301. The bottom positioning rods two 3023 are on the same side as the bottom positioning rods one 3022. The bottom tension springs 3024 are fixedly installed between the bottom positioning rods one 3022 and the bottom positioning rods two 3023; The positioning unit 400 includes a top angle plate 401, top guide rods 402, top outer pressure blocks 403, top outer sleepers 404, top outer arc grooves 405, top inner pressure blocks 406, top inner sleepers 407, top inner arc grooves 408, top return springs 409, top positioning rods one 4010, top positioning rods two 4011 and top tension springs 4012. The top angle plates 401 are fixedly installed on the side walls of the square tube frame 201 in a left-right distribution. The top guide rods 402 are fixedly installed between the left and right top angle plates 401 in an up-down distribution and have the same specifications as the bottom guide rods 303. The top outer pressure blocks 403 are fixedly installed around the up-down two top guide rods 402 in a left-right distribution. The top outer sleepers 404 are fixedly installed at the bottoms of the top outer pressure blocks 403. The top outer arc grooves 405 are opened at the lower ends of the side faces of the left and right top outer sleepers 404 close to each other. The top inner pressure blocks 406 are slidably installed around the up-down two top guide rods 402 in a left-right distribution and are located between the left and right top outer pressure blocks 403. The top inner sleepers 407 are fixedly installed at the bottoms of the top inner pressure blocks 406. The top inner arc grooves 408 are symmetrically opened at both ends of the bottoms of the top inner sleepers 407 in a left-right manner. The top return springs 409 are sleeved around the top guide rods 402 and are fixedly installed between the top outer pressure blocks 403 and the top inner pressure blocks 406. The top positioning rods one 4010 are fixedly installed at the tops of the top angle plates 401. The top positioning rods two 4011 are fixedly installed at the tops of the top outer pressure blocks 403. The top tension springs 4012 are fixedly installed between the top positioning rods one 4010 and the top positioning rods two 4011. The positions and specifications of the top outer pressure blocks 403 are the same as those of the bottom outer pressure blocks 304. The positions and specifications of the top inner pressure blocks 406 are the same as those of the bottom inner pressure blocks 307. The specifications of the top outer arc grooves 405 and the top inner arc grooves 408 are adapted to the outer wall specifications of the heat exchanger pipe fittings. The specifications of the bottom outer arc grooves 306 and the bottom inner arc grooves 309 are adapted to the outer wall specifications of the heat exchanger pipe fittings.

[0025] Specifically, by the upward movement of the bottom outer arc groove 306 and the bottom inner arc groove 309, the three heat exchanger pipe fittings located inside the three positioning arc grooves 2082 are lifted upward until the outer wall tops of the heat exchanger pipe fittings respectively contact the inner walls of the top outer arc groove 405 and the top inner arc groove 408. At this time, the left and right push heads 3018 just move to both sides of the left and right top sleepers 404, limiting the left and right top sleepers 404 so that they cannot move outward. After that, as the output rods of the front and rear lifting cylinders 3012 continue to retract and drive the front and rear lifting seats 3011 to move upward continuously, at this time, the two buffer springs 3017 are compressed and store energy, and the lifting seat 3011 slides upward along the outer wall of the lifting rod 3010 and continues to drive the left and right extrusion vertical plates 3013 and the wedge surfaces 3014 to move. The left and right wedge surfaces 3014 generate a centering force on the left and right guide wheels 3016, causing the left and right guide wheels 3016 to move towards each other at a constant speed. Under the connection of the left and right L-shaped cantilever arms 3015, the left and right bottom outer pressing blocks 304 are squeezed towards the middle. By the synchronous extrusion of the left and right bottom outer pressing blocks 304 and the left and right push heads 3018 on the left and right top outer pressing blocks 403, the squeezing of the two bottom outer pressing blocks 304 towards the middle also drives the left and right bottom inner pressing blocks 307 to move towards the middle through the left and right bottom return springs 3021, thereby causing the bottom outer arc groove 306 of the left and right bottom sleepers 305 and the bottom inner arc groove 309 of the left and right bottom sleepers 308 to move towards the middle, squeezing the lower part of the outer wall of the heat exchanger pipe fitting. At the same time, the left and right top outer pressing blocks 403 squeeze the left and right top inner pressing blocks 406 to move towards the middle through the left and right top return springs 409, causing the top outer arc groove 405 of the left and right top sleepers 404 and the top inner arc groove 408 of the left and right top sleepers 407 to squeeze the upper part of the outer wall of the heat exchanger pipe fitting, thereby positioning the three heat exchanger pipe fittings simultaneously with high processing stability.

[0026] When a tapping mechanism for heat exchanger pipe fittings in this solution is working, first, the heat exchanger pipe fittings are intermittently conveyed to the left ends of the tops of the front and rear sleeper rails 208 through a conveying device, so that the heat exchanger pipe fittings are supported on the tops of the front and rear pre-storage grooves 2081. The heat exchanger pipe fittings are blocked by the inclined surface at the right end of the pre-storage groove 2081 and will not roll to the right. Then, the output rod of the lifting cylinder 206 pushes the dial block 207 downward to move, so that the dial block 207 moves down to the left side of the third heat exchanger pipe fitting starting from the rightmost end of the top of the pre-storage groove 2081. Subsequently, the output rod of the horizontal push cylinder 203 retracts, and drives the translation plate 205 to move along the front and rear optical rods 209 towards the direction close to the horizontal push cylinder 203 through the drag plate 204. At this time, the translation plate 205 drives the dial block 207 to move together under the connection of the lifting cylinder 206, and pushes the three heat exchanger pipe fittings at the rightmost end of the top of the pre-storage groove 2081 to the right. The heat exchanger pipe fittings roll along the top surface of the pre-storage groove 2081 and sequentially enter the three positioning arc grooves 2082. Subsequently, the output rod of the horizontal push cylinder 203 stops moving. At this time, through the limiting effects of the three positioning arc grooves 2082 on the three heat exchanger pipe fittings respectively, the three heat exchanger pipe fittings are prevented from rolling further. Then, the conveying device continues to convey three heat exchanger pipe fittings to be processed to the tops of the front and rear pre-storage grooves 2081. At the same time, the output rod of the lifting cylinder 206 drives the dial block 207 to move upward. Then, the output rod of the horizontal push cylinder 203 extends and pushes the translation plate 205 to move along the front and rear optical rods 209 away from the horizontal push cylinder 203 through the drag plate 204, and drives the dial block 207 to move together through the lifting cylinder 206. Since the output rod of the lifting cylinder 206 drives the dial block 207 to move upward, therefore, when the dial block 207 moves away from the horizontal push cylinder 203, the bottom of the dial block 207 will not contact the tops of the heat exchanger pipe fittings at the top of the pre-storage groove 2081. Therefore, it will not cause the heat exchanger pipe fittings at the top of the pre-storage groove 2081 to roll in the reverse direction; After the three heat exchanger pipe fittings enter the three positioning arc grooves 2082, the output rods of the front and rear lifting cylinders 3012 retract, pushing the front and rear lifting seats 3011 upward. Further, under the connection of the buffer springs 3017, the lifting rods 3010 move upward, driving the aluminum profile frame 301, bottom angle plates 302, bottom guide rods 303, bottom outer pressing blocks 304, bottom outer sleepers 305, bottom outer arc grooves 306, bottom inner pressing blocks 307, bottom inner sleepers 308, bottom inner arc grooves 309, extrusion vertical plates 3013, wedge surfaces 3014, L-shaped cantilevers 3015, guide wheels 3016 and push heads 3018 upward. At the same time, the bottom outer arc grooves 306 and the bottom inner arc grooves 309 move upward, lifting the three heat exchanger pipe fittings located inside the three positioning arc grooves 2082 until the outer wall tops of the heat exchanger pipe fittings contact the inner walls of the top outer arc groove 405 and the top inner arc groove 408 respectively. At this time, the left and right push heads 3018 just move to both sides of the left and right top outer sleepers 404, limiting the left and right top outer sleepers 404 so that they cannot move outward. After that, as the output rods of the front and rear lifting cylinders 3012 continue to retract and drive the front and rear lifting seats 3011 to move upward continuously, at this time, the two buffer springs 3017 are compressed and store energy, and the lifting seats 3011 slide upward along the outer walls of the lifting rods 3010, and continue to drive the left and right extrusion vertical plates 3013 and the wedge surfaces 3014 to move. The left and right wedge surfaces 3014 generate centering forces on the left and right guide wheels 3016, causing the left and right guide wheels 3016 to move towards each other at the same speed. Under the connection of the left and right L-shaped cantilevers 3015, the left and right bottom outer pressing blocks 304 are squeezed towards the middle. By synchronously squeezing the left and right top outer pressing blocks 403 through the left and right bottom outer pressing blocks 304 and the left and right push heads 3018, the squeezing of the left and right bottom outer pressing blocks 304 towards the middle also drives the left and right bottom inner pressing blocks 307 to move towards the middle through the left and right bottom return springs 3021, and further makes the bottom outer arc grooves 306 of the left and right bottom outer sleepers 305 and the bottom inner arc grooves 309 of the left and right bottom inner sleepers 308 move towards the middle, squeezing the lower part of the outer wall of the heat exchanger pipe fitting. At the same time, the left and right top outer pressing blocks 403 squeeze the left and right top inner pressing blocks 406 towards the middle through the left and right top return springs 409, causing the top outer arc grooves 405 of the left and right top outer sleepers 404 and the top inner arc grooves 408 of the left and right top inner sleepers 407 to squeeze the upper part of the outer wall of the heat exchanger pipe fitting, thereby positioning the three heat exchanger pipe fittings simultaneously. After that, the front and rear three-axis tapping machines 500 tap the front and rear pipe orifices of the three heat exchanger pipe fittings; After the tapping is completed, the output rods of the front and rear two lifting cylinders 3012 continue to extend, pushing the front and rear two lifting seats 3011 to move downward, releasing the lifting and positioning of the three heat exchanger pipes, and the three heat exchanger pipes fall back into the three positioning arc grooves 2082. Then, the output rod of the lifting cylinder 206 pushes the shift block 207 downward to move, so that the shift block 207 moves down to the left side of the third heat exchanger pipe located at the rightmost end of the top of the pre-storage groove 2081. Subsequently, the output rod of the horizontal push cylinder 203 retracts, and drives the translation plate 205 to move along the front and rear two light rods 209 toward the direction close to the horizontal push cylinder 203 through the drag plate 204. At this time, the translation plate 205 is connected to the lifting cylinder 206. The lower driving block 207 moves together to push the three heat exchanger pipe fittings at the rightmost end of the top of the pre-storage groove 2081 to the right. The heat exchanger pipe fittings roll along the top surface of the pre-storage groove 2081 and enter the three positioning arc grooves 2082 in turn, and push the heat exchanger pipe fittings that have been tapped in the previous step to the right, and push the three processed heat exchanger pipe fittings to the top of the inclined guide surface 2083, and finally roll to the right along the top of the inclined guide surface 2083 to complete the unloading after tapping, and continue to repeat the above steps, so that the tapping mechanism can tap multiple heat exchanger pipe fittings at one time, and further realize the automatic loading of heat exchanger pipe fittings and the automatic unloading after tapping, with a high degree of automation and high processing efficiency.

[0027] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A tapping mechanism for a heat exchanger pipe fitting, characterized in that: Comprising: Profile frame (100); Pick-and-place unit (200), fixedly arranged on the top of the profile frame (100) for automatic loading and unloading of heat exchanger pipe fittings; Lifting unit (300), fixedly arranged on the top of the profile frame (100) and located at the bottom of the pick-and-place unit (200), the lifting unit (300) being used for lifting and supporting heat exchanger pipe fittings; Positioning unit (400), fixedly arranged on the top of the profile frame (100) in a front-back distribution and located between the bottom of the pick-and-place unit (200) and the top of the lifting unit (300), the positioning unit (400) and the lifting unit (300) positioning the heat exchanger pipe fittings; Three-axis tapping machine (500), symmetrically arranged in the front and back on the top of the profile frame (100).

2. The tapping mechanism for heat exchanger pipe fittings according to claim 1, wherein: The pick-and-place unit (200) comprises: Square pipe rack (201), fixedly installed on the top of the profile frame (100); Connecting plate (202), fixedly installed at the end of the square pipe rack (201); Flat push cylinder (203), fixedly installed at one end of the square pipe rack (201 away from the connecting plate (202); Drag plate (204), fixedly installed at the end of the output rod of the flat push cylinder (203); Translation plate (205), fixedly installed at the end of the drag plate (204) away from the flat push cylinder (203); Lifting cylinder (206), fixedly installed on the side surface of the translation plate (205) away from the drag plate (204); Pushing block (207), fixedly installed at the bottom of the output rod of the lifting cylinder (206); Pillow rails (208), fixedly installed on the top of the profile frame (100) in a front-back distribution; Smooth rods (209), fixedly installed at the right end of the connecting plate (202) in a front-back distribution, the translation plate (205) being slidably installed on the outer walls of the front and back two smooth rods (209).

3. The tapping mechanism for heat exchanger pipe fittings according to claim 2, wherein: The lifting unit (300) comprises: Aluminum profile frame (301), located on the top of the profile frame (100); Bottom angle plates (302), fixedly installed at the front two ends and the rear two ends of the aluminum profile frame (301); Bottom guide rods (303), fixedly installed between the left and right two bottom angle plates (302) in an up-down distribution; Bottom outer pressure blocks (304), slidably installed around the up-down two bottom guide rods (303) in a left-right distribution; Bottom outer sleepers (305), respectively fixedly installed on the tops of the two bottom outer pressure blocks (304); Bottom outer arc grooves (306), opened at the top of the ends of the two bottom outer sleepers (305) close to each other; Bottom inner pressure blocks (307), slidably installed around the up-down two bottom guide rods (303) in a left-right distribution and located between the left and right two bottom outer pressure blocks (304); Bottom inner sleepers (308), respectively fixedly installed on the tops of the two bottom inner pressure blocks (307); The bottom inner arc grooves (309) are symmetrically distributed on the top left corner and the top right corner of the top of the bottom inner sleeper (308), and the specifications of the bottom inner arc grooves (309) correspond to those of the bottom outer arc grooves (306).

4. A tapping mechanism for a heat exchanger pipe fitting according to claim 3, wherein: The lifting unit (300) further includes: Lifting rods (3010) are fixedly installed at the left end and the right end of the bottom of the aluminum profile frame (301) in the front and rear directions, and there are four in total. The four lifting rods (3010) slide through the inside of the profile frame (100). Lifting seats (3011) are slidably installed at the lower parts of the outer walls of the left and right lifting rods (3010). Lifting cylinders (3012) are fixedly installed at the top of the profile frame (100) in the front and rear directions, and their output rods movably penetrate through the inside of the profile frame (100). Extrusion vertical plates (3013) are fixedly installed at the sides of the lifting seats (3011) in the left and right directions. Wedge surfaces (3014) are opened at the upper parts of the opposite surfaces of the left and right extrusion vertical plates (3013). L-shaped cantilevers (3015) are symmetrically distributed and fixedly installed on the outer surfaces of the two bottom outer pressure blocks (304). Guide wheels (3016) are rotatably installed on the L-shaped cantilevers (3015) through axles, and are located at the ends of the L-shaped cantilevers (3015) far from the bottom outer pressure blocks (304). The positions of the guide wheels (3016) correspond to the positions of the wedge surfaces (3014). Buffer springs (3017) are sleeved around the lifting rods (3010), and are fixedly installed between the bottom of the profile frame (100) and the top of the lifting seats (3011).

5. A tapping mechanism for a heat exchanger pipe fitting according to claim 4, wherein: The lifting unit (300) further includes: Push heads (3018) are fixedly installed on the opposite surfaces of the left and right bottom outer pressure blocks (304), and extend to the top of the bottom outer sleeper (305). U-shaped grooves (3019) are opened at the tops of the push heads (3018), and the inner diameter of the U-shaped grooves (3019) is larger than the outer diameter of the top guide rods (402).

6. A tapping mechanism for a heat exchanger pipe fitting according to claim 5, wherein: The lifting unit (300) further includes; Bottom return springs (3021) are sleeved around the top guide rods (402), and are fixedly installed between the bottom outer pressure blocks (304) and the bottom inner pressure blocks (307). Bottom positioning rods one (3022) are fixedly installed on the outer surface of the bottom angle plate (302). Bottom positioning rods two (3023) are fixedly installed on the side surface of the bottom outer pressure block (304) far from the aluminum profile frame (301). The bottom positioning rods two (3023) are on the same side as the bottom positioning rods one (3022). Bottom tension springs (3024) are fixedly installed between the bottom positioning rods one (3022) and the bottom positioning rods two (3023).

7. A tapping mechanism for a heat exchanger pipe fitting according to claim 6, wherein: The positioning unit (400) includes: The top angle plates (401) are fixedly installed on the side walls of the square pipe rack (201) in a left-right distribution. The top guide rods (402) are fixedly installed between the left and right top angle plates (401) in an up-down distribution, and have the same specifications as the bottom guide rods (303). The top outer pressure blocks (403) are fixedly installed around the up-down two top guide rods (402) in a left-right distribution. The top outer sleepers (404) are fixedly installed at the bottom of the top outer pressure blocks (403). The top outer arc grooves (405) are opened at the lower ends of the adjacent side surfaces of the left and right top outer sleepers (404). The top inner pressure blocks (406) are slidably installed around the up-down two top guide rods (402) in a left-right distribution, and are located between the left and right top outer pressure blocks (403). The top inner sleepers (407) are fixedly installed at the bottom of the top inner pressure blocks (406). The top inner arc grooves (408) are symmetrically opened at both ends of the bottom of the top inner sleepers (407).

8. The tapping mechanism for heat exchanger pipe fittings according to claim 7, characterized in that: The positioning unit (400) further includes: The top return spring (409) is sleeved around the top guide rod (402) and is fixedly installed between the top outer pressure block (403) and the top inner pressure block (406). The top positioning rod one (4010) is fixedly installed at the top of the top angle plate (401). The top positioning rod two (4011) is fixedly installed at the top of the top outer pressure block (403). The top tension spring (4012) is fixedly installed between the top positioning rod one (4010) and the top positioning rod two (4011).

9. The tapping mechanism for heat exchanger pipe fittings according to claim 8, characterized in that: The position and specifications of the top outer pressure block (403) are the same as those of the bottom outer pressure block (304), the position and specifications of the top inner pressure block (406) are the same as those of the bottom inner pressure block (307), the specifications of the top outer arc groove (405) and the top inner arc groove (408) are adapted to the outer wall specifications of the heat exchanger pipe fittings, and the specifications of the bottom outer arc groove (306) and the bottom inner arc groove (309) are adapted to the outer wall specifications of the heat exchanger pipe fittings.

10. The tapping mechanism for heat exchanger pipe fittings according to claim 9, characterized in that: A pre-storage groove (2081) is opened at the left end of the top of the sleeper rail (208), three positioning arc grooves (2082) are opened in the middle area of the top of the sleeper rail (208) and are equally spaced left and right, the specifications of the positioning arc grooves (2082) are adapted to the outer wall specifications of the heat exchanger pipe fittings, and an inclined guide surface (2083) is opened at the right end of the top of the sleeper rail (208).

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