Drawing device for shaping machining of copper pipe

Abstract

The invention relates to the technical field of copper pipe processing, in particular to a drawing device for copper pipe shaping processing, which comprises a die structure, a drawing structure and a cutting structure, the die structure is used for drawing and shaping a copper pipe through a die hole in the die structure, the drawing structure is used for continuously drawing the copper pipe, and the cutting structure is used for cutting the drawn copper pipe; the drawing structure comprises a base table and two conveying units oppositely installed on the base table. Each conveying unit comprises two conveying wheels rotationally installed on the base table and a conveying chain installed on the two conveying wheels in a transmission mode. By adopting the mode of circularly clamping and drawing the copper pipe, the copper pipe drawing work can be continuously carried out, the working efficiency is effectively improved, the time waste of resetting of a working table in a traditional mode is eliminated, and meanwhile, due to the fact that a plurality of side clamping bodies can continuously move and the copper pipe is in a continuous drawing state, the copper pipe can be continuously drawn. Therefore, the side clamping bodies cannot generate instantaneous state change, the impact phenomenon is eliminated, the equipment and the copper pipe are conveniently protected, the copper pipe is prevented from being damaged by instantaneous impact, and the running stability of the equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of copper tube processing, in particular to a drawing device for copper tube shaping processing. Background Art

[0002] As an important industrial material, copper tubes are widely used in refrigeration, electricity, construction, automobiles and other fields. With the continuous improvement of modern industry's requirements for copper tube performance, the dimensional accuracy, surface quality and mechanical properties of copper tubes have become key indicators to measure their quality. Copper tube drawing is a processing method that pulls the copper tube blank through the die continuously and uses the die to reduce the diameter and shape the copper tube. This processing method can significantly improve the dimensional accuracy and surface finish of the copper tube, so it has gradually become the core means of copper tube shaping.

[0003] At present, the copper tube drawing process mainly relies on mechanical drawing equipment. However, the existing drawing devices have the following problems in practical applications: The continuity of copper tube drawing is poor. After the moving platform on the drawing device moves to the farthest position, it needs to be reset in the reverse direction and clamp the copper tube again for another drawing, which makes it impossible to achieve continuous drawing of the copper tube. The movement form of the movable table changes instantaneously. When the movable table is reset and clamps the copper tube, it will be remounted on the conveyor chain. Since the conveyor chain is continuously conveying and the movable table is stationary, the conveyor chain will instantly pull the movable table to move, which has a large impact on the movable table and the entire equipment. In addition, the instantaneous change of the state of the movable table will be transmitted to the copper tube, causing the copper tube to be instantly subjected to a large pulling force, which is easy to cause damage to the copper tube and the mold. Summary of the invention

[0004] The present invention provides a drawing device for copper tube shaping processing, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A drawing device for copper tube shaping processing, comprising a die structure, a drawing structure and a cutting structure, wherein the die structure draws and shapes the copper tube through a die hole thereon, the drawing structure is used for continuously drawing the copper tube, and the cutting structure is used for cutting the drawn copper tube; The pulling structure includes a base and two conveying units relatively installed on the base, the conveying unit includes two conveying wheels rotatably installed on the base and a conveying chain transmission-installed on the two conveying wheels, a plurality of side clamps are arranged on the conveying chain, at least during part of the movement of the side clamps, the corresponding two side clamps on the two conveying units dock with each other and perform linear motion synchronously.

[0006] In some embodiments of the present invention, the side clamping body includes a clamping plate and a slot opened on the side wall of the clamping plate. When two corresponding side clamping bodies are connected, the two slots are connected to form a through hole and are used to insert the copper tube. An anti-slip body is arranged in the slot, and the anti-slip body is used for frictional contact with the copper tube.

[0007] In some embodiments of the present invention, the notch includes a shallow groove, a conical groove and a deep groove, the anti-slip body is located in the conical groove, and the shape of the anti-slip body corresponds to the shape of the inner wall of the conical groove and is used in conjunction with each other.

[0008] In some embodiments of the present invention, the anti-slip body is connected to the inner wall of the deep groove via a spring sheet.

[0009] In some embodiments of the present invention, a plurality of insertion holes and a plurality of insertion posts are provided on the side wall of the clamping plate, and a insertion post on one of the clamping plates is used to be inserted into a corresponding insertion hole on the clamping plate.

[0010] In some embodiments of the present invention, an electromagnetic structure is disposed inside the socket, and the electromagnetic structure is used to adsorb and fix the plug.

[0011] In some embodiments of the present invention, the side clamp body further comprises a support plate connected to the conveying chain and a moving platform slidably mounted on the support plate, and the support plate and the moving platform are connected via a plurality of spring plates; The conveying unit further comprises a guide plate arranged on the base, and both ends of the guide plate are arc-shaped, and the guide plate is used to guide the moving platform and make the two corresponding side clamps vertically dock with each other.

[0012] In some embodiments of the present invention, the cutting structure includes a substrate fixed relative to the base, a movable seat that slides obliquely on the substrate, and a laser cutter installed on the movable seat. During the partial process of the synchronous linear motion of the two corresponding side clamps, the side walls of the side clamps contact the side walls of the movable seat and push the movable seat to move.

[0013] In some embodiments of the present invention, the cutting structure further comprises a long barrel mounted on the base plate and a piston slidably located inside the long barrel, wherein a fluid is stored inside the long barrel, a plurality of holes are provided on the piston, and the fluid flows on both sides of the piston through the holes on the piston, and sliding rods are provided on both sides of the piston, and the ends of the sliding rods slide and extend out of the long barrel; Two pulleys are rotatably arranged on the base plate, and a transmission belt is arranged on each of the pulleys, one end of the transmission belt is connected to the movable seat, and the other end of the transmission belt is connected to the end corresponding to the sliding rod; The base plate is provided with a torsion spring for providing elastic force for the rotation of the pulley.

[0014] In some embodiments of the present invention, the mold hole on the mold structure includes a drawing port and a sizing hole, the drawing port is used to shape the copper tube, and the sizing hole is used to shape the copper tube.

[0015] The technical solution of the present invention can achieve the following technical effects: By adopting the method of cyclically clamping and pulling the copper tube, the copper tube pulling work can be carried out continuously, effectively improving the work efficiency and eliminating the time waste of resetting the workbench in the traditional method. At the same time, since several side clamps can move continuously and the copper tube is in a continuous drawing state, the side clamps will not produce instantaneous changes in state, thereby eliminating the impact phenomenon, facilitating the protection of equipment and copper tubes, avoiding damage to the copper tubes caused by instantaneous impacts, and improving the stability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a structural schematic diagram of a drawing structure in an embodiment of the present invention; Figure 3 is a schematic structural diagram of a conveying unit in an embodiment of the present invention; Figure 4 is a schematic structural diagram of a side clamp body in an embodiment of the present invention; Figure 5 yes Figure 4 A schematic diagram of the structure from another perspective; Figure 6 is a schematic structural diagram of a cutting structure in an embodiment of the present invention; Figure 7 yes Figure 6 A schematic diagram of the structure from another perspective; Figure 8 It is a schematic diagram of the cross-sectional structure of the mold structure in an embodiment of the present invention.

[0018] Reference numerals: 100. Die structure; 101. Drawing port; 102. Sizing hole; 200, drawing structure; 201, base; 202, conveying unit; 203, conveying wheel; 204, conveying chain; 205, side clamp; 206, blanking port; 207, roller; 208, clamping plate; 209, shallow groove; 210, cone groove; 211, deep groove; 212, anti-skid body; 213, spring piece 1; 214, plug hole; 215, plug column; 216, support plate; 217, moving platform; 218, spring piece 2; 219, first pulley; 220, guide plate; 221, column; 222, connecting sleeve; 223, bottom plate; 224, support frame; 225, roller; 226, guide ring; 300, cutting structure; 301, substrate; 302, moving seat; 303, laser cutter; 304, second pulley; 305, long barrel; 306, piston; 307, slide rod; 308, pulley; 309, transmission belt; 310, torsion spring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0021] like Figures 1 to 3 As shown, a drawing device for copper tube shaping of the present invention comprises a die structure 100, a drawing structure 200 and a cutting structure 300. The die structure 100 draws and shapes the copper tube through a die hole thereon, the drawing structure 200 is used for continuously drawing the copper tube, and the cutting structure 300 is used for cutting the drawn copper tube; The pulling structure 200 includes a base 201 and two conveying units 202 relatively installed on the base 201. The conveying unit 202 includes two conveying wheels 203 rotatably installed on the base 201 and a conveying chain 204 transmission-installed on the two conveying wheels 203. A plurality of side clamps 205 are arranged on the conveying chain 204. At least during part of the movement of the side clamps 205, the corresponding side clamps 205 on the two conveying units 202 dock with each other and perform linear motion synchronously.

[0022] In the present invention, the drawing structure 200 can pull the copper tube passing through the mold structure 100 and deform it, so that the wall thickness, shape and other dimensions of the copper tube will change, thereby realizing the drawing of the copper tube, and the cutting structure 300 can cut the copper tube that has been drawn to a specified length. Since the drawing structure 200 can realize the operation mode of continuously drawing the copper tube, the cutting structure 300 can repeatedly cut the copper tube, so that the copper tube can realize the continuous drawing processing mode; the base 201 on the drawing structure 200 is mainly used to provide an installation position for the two conveying units 202, and the two conveying wheels 203 in the conveying unit 202 can realize the purpose of continuously conveying the conveying chain 204. The rotation of the conveying wheel 203 can be powered by a motor, so that the conveying chain 204 can realize a capsule-shaped motion trajectory, and the conveying chain 204 can then drive multiple side clamps 205 to move synchronously, so that the side clamps 205 can perform continuous rotational motion, and the side clamps 205 on the two conveying units 202 can dock and realize the clamping and fixing work of the copper tube; because the copper tube needs to be pulled in a straight line, a straight line side of the motion trajectory of the side clamp 205 can be used as a working position, and when the side clamp 205 moves to this position, the corresponding two side clamps 205 dock and clamp the copper tube, and at the same time, the two side clamps 205 move in a straight line and pull the copper tube, thereby realizing the pulling work of the copper tube; When in use, the end of the copper tube can be made into a cone shape to facilitate passing through the mold structure 100, and drawing oil needs to be applied to the copper tube to reduce the friction between the copper tube and the mold structure 100. The conveying wheels 203 and the conveying chains 204 on the two conveying units 202 rotate synchronously, and the movement trajectories of the two conveying chains 204 are opposite. The conveying chain 204 drives multiple side clamps 205 thereon to move synchronously. When the side clamps 205 move to the side close to the mold structure 100, the two side clamps 205 on the two conveying units 202 approach each other and dock and clamp and fix the copper tube therebetween. Then the conveying chain 204 pulls the side clamps 205 to move, and the clamps 205 on both sides of the docking state pull the copper tube to move, thereby realizing the drawing of the copper tube. When the side clamps 205 move to a position away from the mold structure 100, the next side clamps on the conveying chain 204 The body 205 is close to the mold structure 100, and the side clamp body 205 clamps the copper tube. At this time, there are two clamping positions on the copper tube, and each clamping position is clamped by the corresponding two-side clamp bodies 205, thereby realizing stable transportation of the copper tube without setting a lifting structure for the copper tube. This movement mode can be identified as at least one clamping position on the copper tube; when there are two clamping positions on the copper tube, the cutting structure 300 cuts the copper tube, and the side clamp body 205 close to the mold structure 100 maintains the clamping and pulling state of the copper tube, while the side clamp body 205 far away from the mold structure 100 moves to the end of its movement trajectory. At this time, the two corresponding side clamp bodies 205 separate from each other and stop clamping the copper tube, and the copper tube falls off naturally. With the continuous movement of the conveying unit 202, continuous and uniform pulling of the copper tube can be realized; It should be pointed out that, in some embodiments, three or more clamping positions may be allowed for the copper tube, that is, at least five groups of side clamps 205 need to be provided on the conveying chain 204, so that the stability of continuous drawing can be improved; since the two conveying units 202 are used for synchronous relative movement, the conveying chain 204 can be set to a horizontal state, so that the side clamps 205 only need to perform rotational movement on the horizontal plane, and in order to prevent the conveying chain 204 from bending downward during conveying, a plurality of rollers 207 may be provided at equal intervals at the bottom of the conveying chain 204, and the side clamps 205 may be provided at equal intervals at the bottom of the base 20 1 is provided with a corresponding groove, and the shape of the groove is capsule-shaped, so that the roller 207 can roll in the groove, thereby supporting the conveying chain 204; a drop opening 206 can be provided on the base 201 between the two conveying units 202 to facilitate the drop of the cut copper tube; in some embodiments, the conveying chain 204 can also be set to an inclined or vertical state, as long as it can ensure that a straight line edge of the conveying chain 204 can be used for straight-line drawing of the copper tube, and the specific installation range is not limited, as long as the purpose of this case can be achieved, it is within the protection scope of this case; By adopting the method of cyclically clamping and pulling the copper tube, the copper tube pulling work can be carried out continuously, effectively improving work efficiency and eliminating the time waste of resetting the workbench in the traditional method. At the same time, since the side clamps 205 can move continuously and the copper tube is in a continuous drawing state, the side clamps 205 will not produce instantaneous changes in state, thereby eliminating the impact phenomenon, facilitating the protection of the equipment and the copper tube, avoiding damage to the copper tube caused by instantaneous impact, and improving the stability of equipment operation.

[0023] Optimized to the above implementation, such as Figure 4 As shown, the side clamp body 205 includes a clamp plate 208 and a slot opened on the side wall of the clamp plate 208. When two corresponding side clamp bodies 205 are connected, the two slots are connected to form a through hole and are used to insert the copper tube. An anti-slip body 212 is arranged in the slot, and the anti-slip body 212 is used for friction contact with the copper tube.

[0024] In the present invention, the conveying chain 204 can provide support for the clamping plate 208 and pull the clamping plate 208 to perform a rotational motion. The motion trajectory of the clamping plate 208 is capsule-shaped. The notches on the clamping plate 208 are mainly used to insert the copper tube. When the two corresponding clamping plates 208 are fitted and docked with each other, the two notches form a through hole, and the two anti-skid bodies 212 in the through hole form a long cylindrical shape and are wrapped around the outer wall of the copper tube. The friction between the anti-skid body 212 and the copper tube can be used to drive the movement of the clamping plate 208 to achieve the pulling of the copper tube; the anti-skid body 212 can be used to achieve synchronous protection of the copper tube, thereby avoiding scratches on the outer wall of the copper tube. At the same time, the anti-skid body 212 can keep the copper tube in a tubular shape as much as possible without being crushed; the anti-skid body 212 can be made of rubber or other anti-skid materials; In some embodiments, the side clamp 205 can also clamp the copper tube directly through the side of the clamp 208, or provide anti-slip teeth on the clamp 208 to achieve effective clamping and fixing of the copper tube by the clamp 208, so that the damage to the copper tube caused by the clamp 208 when clamping the copper tube can be ignored.

[0025] Optimized to the above implementation, such as Figure 4 As shown, the notch includes a shallow groove 209, a conical groove 210 and a deep groove 211, and the anti-skid body 212 is located in the conical groove 210, and the shape of the anti-skid body 212 corresponds to the shape of the inner wall of the conical groove 210 and cooperates with each other.

[0026] The inner wall of the anti-skid body 212 is in the shape of a straight cylinder, and the outer wall of the anti-skid body 212 is in the shape of a cone that matches the inner wall of the conical groove 210. When the anti-skid body 212 clamps the copper tube, the moving direction of the clamping plate 208 is in the direction in which the diameter of the inner wall of the conical groove 210 gradually increases. The friction force of the copper tube on the anti-skid body 212 causes the anti-skid body 212 and the inner wall of the conical groove 210 to generate an extrusion force. By using the conical groove 210 and the anti-skid body 212 in coordination, the greater the pulling force of the copper tube, the tighter the anti-skid body 212 squeezes the copper tube, thereby improving the effectiveness of the drawing work and avoiding slipping. The shallow groove 209 and the deep groove 211 are mainly used to facilitate the processing of the notch and the insertion of the copper tube. Optimized to the above implementation, such as Figure 4 As shown, the anti-skid body 212 is connected to the inner wall of the deep groove 211 via a spring sheet 213 .

[0027] When the clamp 208 uses the anti-slip body 212 to pull the copper tube, the copper tube exerts a force on the anti-slip body 212 in the opposite direction, which will cause a small deformation of the anti-slip body 212 and a small displacement of the anti-slip body 212 in the conical groove 210. Therefore, when the side clamp 205 is separated from the copper tube, it is necessary to use the spring 213 to pull the anti-slip body 212 to reset, so as to prepare for the next pulling work; the anti-slip body 212 can be slidably installed on the conical inner wall of the conical groove 210 through structures such as sliding grooves and sliding edges.

[0028] Optimized to the above implementation, such as Figure 4 As shown, a plurality of insertion holes 214 and a plurality of insertion posts 215 are provided on the side wall of the clamping plate 208 , and the insertion posts 215 on one clamping plate 208 are used to be inserted into the insertion holes 214 on the corresponding clamping plate 208 .

[0029] In the present invention, when the two clamps 208 are docked, in order to achieve the accurate combination of the two slots, the two clamps 208 can be positioned by using the socket 214 and the pin 215, that is, the pin 215 on one clamp 208 can be inserted into the socket 214 on the other clamp 208. In this way, by using a plurality of sockets 214 and a plurality of pins 215 in coordination, the two clamps 208 can be better formed into a whole, and this method can facilitate the copper tube to be accurately positioned in the slot; the specific number and distribution position of the socket 214 and the pin 215 are not limited here, as long as they do not affect the normal use of other structures; in order to facilitate the smooth insertion of the pin 215 into the socket 214, the opening of the socket 214 and the end of the pin 215 can be set to be conical.

[0030] Optimizing the above implementation, an electromagnetic structure is provided inside the plug hole 214 , and the electromagnetic structure is used to adsorb and fix the plug post 215 .

[0031] When the two corresponding clamping plates 208 are butted against each other, the squeezing force between them is mainly provided by the driving force of the conveying chain 204, so the strength and effectiveness of this driving force are relatively low. In order to improve the clamping effect, an electromagnetic structure can be provided in the socket 214. When the plug 215 is inserted into the socket 214, the electromagnetic structure is energized, and the electromagnetic structure magnetically fixes the plug 215, so that the two clamping plates 208 fit more closely, and the squeezing strength of the two clamping plates 208 on the copper tube is improved, so that it can be more effective. To realize the drawing process of the copper tube, the conveyor chain 204 only needs to pull the clamp 208 to move, and it no longer provides lateral squeezing force on the copper tube for the clamp 208; the electromagnetic structure in the socket 214 can be an electromagnetic coil or other structure that can generate magnetic force when energized, as long as it can provide magnetic attraction for the plug post 215, the plug post 215 can be made of magnetic conductive material, and the clamp 208 can be made of non-magnetic conductive material; in some embodiments, a magnetic conductive structure can also be set inside the plug post 215 to enhance the adsorption and clamping strength.

[0032] Optimized to the above implementation, such as Figures 3 to 5 As shown, the side clamp body 205 further includes a support plate 216 connected to the conveying chain 204 and a moving platform 217 slidably mounted on the support plate 216, and the support plate 216 and the moving platform 217 are connected by a plurality of spring plates 218; The conveying unit 202 further includes a guide plate 220 disposed on the base 201 , and both ends of the guide plate 220 are arc-shaped. The guide plate 220 is used to guide the moving platform 217 and enable the two corresponding side clamps 205 to vertically dock with each other.

[0033] In the present case, since the movement trajectory of the splint 208 is capsule-shaped, when the splints 208 on the two conveying units 202 approach each other, the movement trajectory of the splint 208 is arc-shaped, then the pins 215 on the two splints 208 will also be in an inclined state, and the pins 215 cannot be inserted into the corresponding sockets 214, and the two splints 208 will counteract each other. To avoid this phenomenon, the above-mentioned implementation method can be adopted. Specifically, when the splint 208 moves to a position close to the copper tube and moves in a straight line, the corresponding two splints 208 are in a separated state, the two splints 208 move synchronously, and the side walls of the two splints 208 are opposite. When the splint 208 moves to the position of the guide plate 220, the side wall of the moving platform 217 will contact the side wall of the guide plate 220. The guide plate 220 guides the movable platform 217, so that the clamping plate 208 moves toward the copper tube, and the two clamping plates 208 move relative to each other synchronously and approach each other vertically. At this time, the pin 215 on the clamping plate 208 can be vertically inserted into the corresponding socket 214, thereby realizing the working mode of first orientation and then clamping; when the guide plate 220 guides the movable platform 217, the movable platform 217 can move on the supporting plate 216, and the spring piece 218 undergoes elastic deformation. The setting of the spring piece 218 is mainly to pull the movable platform 217 to reset when the movable platform 217 is separated from the guide plate 220; the arcs at both ends of the guide plate 220 are mainly to facilitate the guidance and pushing of the movable platform 217; in order to reduce the friction between the movable platform 217 and the guide plate 220, it can be as follows Figure 5 As shown, a plurality of first pulleys 219 are provided on the side wall of the moving platform 217, and the first pulleys 219 are used to contact the side wall of the guide plate 220; In some embodiments, a support structure may be provided in the conveying unit 202 to achieve a support effect on each clamping plate 208, so that the conveying chain 204 only needs to pull the clamping plate 208. Specifically, Figure 3 to Figure 4As shown, the support structure can be a column 221 arranged at the bottom of the clamping plate 208 and a connecting sleeve 222 rotatably mounted on the column 221, the connecting sleeve 222 is fixedly connected to the conveying chain 204, a bottom plate 223 is fixed at the bottom of the column 221, and support frames 224 are rotatably mounted at both ends of the bottom plate 223. The shape of the support frame 224 is an arched shape with an opening facing downward, and two rollers 225 are relatively rotatably mounted on the inner side of the support frame 224. Two guide rings 226 are arranged on the base 201, and the shape of the guide rings 226 is consistent with the movement trajectory of the clamping plate 208, and the inner wall of the guide ring 226 and There are card slots on the outer walls for use with rollers 225. The support frame 224 is slidably installed on the guide ring 226 through two rollers 225. The purpose of setting two conveying chains 204 on each clamp 208 is to allow the side clamp 205 to change direction when performing capsule-shaped trajectory movement. Therefore, the conveying chain 204 only needs to pull the clamp 208 to move through the connecting sleeve 222 and the column 221. The column 221 will drive the roller 225 to roll in the card slot on the guide ring 226 through the bottom plate 223 and the two support frames 224, thereby achieving a supporting effect on the clamp 208.

[0034] Optimized to the above implementation, such as Figure 6 As shown, the cutting structure 300 includes a substrate 301 fixed relatively to the base 201, a movable seat 302 sliding obliquely on the substrate 301, and a laser cutter 303 installed on the movable seat 302. During the partial process of the synchronous linear motion of the two corresponding side clamps 205, the side walls of the side clamps 205 contact the side walls of the movable seat 302 and push the movable seat 302 to move.

[0035] In the present invention, the base plate 301 can be set at an angle, or an inclined surface can be set on the base plate 301 to allow the movable seat 302 to slide at an angle. When the movable seat 302 slides at an angle, the farther it is from the mold structure 100, the higher the movable seat 302 is in the vertical direction. In this way, when the clamping plate 208 moves in a straight line and gradually moves away from the mold structure 100, the side wall of the clamping plate 208 will contact the side wall of the movable seat 302 and push the movable seat 302 to move, and the movable seat 302 drives the laser cutter 303 to move synchronously. At this time, the laser cutter 303 moves synchronously with the copper tube, and the laser cutter 303 irradiates the laser and cuts the copper tube. In this way, the copper tube achieves a dynamic cutting effect, thereby improving the continuity of the copper tube drawing. The movable seat 302 performs a tilting movement, so when the movable seat 302 is separated from the splint 208 in the vertical direction, the splint 208 no longer provides a driving force for the movable seat 302, and the laser cutter 303 moves relative to the copper tube; it should be pointed out that the laser cutter 303 completes the cutting of the copper tube in the process of synchronous movement with the copper tube, and when the splint 208 is separated from the movable seat 302, the movable seat 302 can be reset by mechanical, manual or other means, so as to facilitate the subsequent continuous cutting of the copper tube; in some embodiments, in order to reduce the friction between the splint 208 and the movable seat 302, a second pulley 304 can be set on the side wall of the movable seat 302, and the second pulley 304 can be used to contact the splint 208.

[0036] Optimized to the above implementation, such as Figure 7 As shown, the cutting structure 300 also includes a long barrel 305 mounted on the base plate 301 and a piston 306 slidably located inside the long barrel 305. The long barrel 305 stores fluid inside, and the piston 306 is provided with a plurality of holes. The fluid flows on both sides of the piston 306 through the holes on the piston 306. Slide rods 307 are provided on both sides of the piston 306, and the ends of the slide rods 307 slide and extend out of the long barrel 305. Two pulleys 308 are rotatably provided on the base plate 301, and a transmission belt 309 is provided on each of the pulleys 308. One end of the transmission belt 309 is connected to the movable seat 302, and the other end of the transmission belt 309 is connected to the end of the corresponding slide rod 307; A torsion spring 310 is disposed on the base plate 301 to provide elastic force for the rotation of the pulley 308 .

[0037] In the present invention, the fluid inside the long barrel 305 can be water, oil, etc. When the piston 306 moves in the long barrel 305, the fluid on one side of the piston 306 will flow to the other side of the piston 306 through the several holes on the piston 306. In this way, the holes on the piston 306 limit the flow rate of the fluid, thereby achieving a buffering effect on the movement of the piston 306; when the moving seat 302 moves, the moving seat 302 will use two transmission belts 309 and two sliding rods 307 to pull the piston 306 to move in the long barrel 305, the pulley 308 rotates, and the torsion spring 310 undergoes elastic deformation. When the splint 208 is separated from the moving seat 302, the torsion spring 310 will push the pulley 308 to rotate in the opposite direction, thereby resetting the piston 306 and the moving seat 302, and the fluid in the long barrel 305 will limit the moving speed of the piston 306 and the moving seat 302, thereby having a buffering effect on the moving seat 302.

[0038] Optimized to the above implementation, such as Figure 8 As shown, the die hole on the die structure 100 includes a drawing port 101 and a sizing hole 102. The drawing port 101 is used to shape the copper tube, and the sizing hole 102 is used to shape the copper tube.

[0039] In the present invention, the copper tube passes through the drawing mouth 101 and the sizing hole 102 in sequence and extends out. The main function of the drawing mouth 101 is to gradually reduce the diameter of the copper tube to the target size to achieve the drawing effect. The drawing mouth 101 allows a conical or arc-shaped design; the main function of the sizing hole 102 is to stabilize the outer diameter of the copper tube and eliminate the dimensional fluctuation caused by elastic recovery. The smooth surface of the drawing mouth 101 can effectively reduce scratches, cracks and other defects on the surface of the copper tube, making the stress distribution of the copper tube more uniform during the deformation process, reducing surface microcracks caused by local stress concentration, making the surface of the copper tube more fully in contact with the mold, and further reducing the surface roughness; in some embodiments, the sizing hole 102 allows an extended design, and its length can be 1-3 times the outer diameter of the copper tube.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A drawing device for copper tube shaping, characterized in that: It includes a die structure, a drawing structure and a cutting structure. The die structure draws and shapes the copper tube through the die hole thereon. The drawing structure is used to continuously draw the copper tube, and the cutting structure is used to cut off the drawn copper tube. The pulling structure includes a base and two conveying units relatively installed on the base, the conveying unit includes two conveying wheels rotatably installed on the base and a conveying chain transmission-installed on the two conveying wheels, a plurality of side clamps are arranged on the conveying chain, at least during part of the movement of the side clamps, the corresponding two side clamps on the two conveying units dock with each other and perform linear motion synchronously.

2. A drawing device for copper tube shaping according to claim 1, characterized in that: The side clamping body includes a clamping plate and a slot opened on the side wall of the clamping plate. When two corresponding side clamping bodies are connected, the two slots are connected to form a through hole and are used to insert the copper tube. An anti-slip body is arranged in the slot, and the anti-slip body is used for friction contact with the copper tube.

3. A drawing device for copper tube shaping according to claim 2, characterized in that: The notch includes a shallow groove, a conical groove and a deep groove. The anti-skid body is located in the conical groove. The shape of the anti-skid body corresponds to the shape of the inner wall of the conical groove and they cooperate with each other.

4. A drawing device for copper tube shaping according to claim 3, characterized in that: The anti-skid body is connected to the inner wall of the deep groove via a spring sheet.

5. A drawing device for copper tube shaping according to claim 2, characterized in that: A plurality of insertion holes and a plurality of insertion posts are arranged on the side wall of the clamping plate, and an insertion post on one clamping plate is used for inserting into a corresponding insertion hole on the clamping plate.

6. A copper tube shaping drawing device according to claim 5, characterized in that: An electromagnetic structure is arranged inside the socket, and the electromagnetic structure is used to adsorb and fix the plug.

7. A drawing device for copper tube shaping according to claim 5 or 6, characterized in that: The side clamp body also includes a support plate connected to the conveying chain and a moving platform slidably mounted on the support plate, and the support plate and the moving platform are connected by a plurality of spring plates; The conveying unit further comprises a guide plate arranged on the base, and both ends of the guide plate are arc-shaped, and the guide plate is used to guide the moving platform and make the two corresponding side clamps vertically dock with each other.

8. A drawing device for copper tube shaping according to claim 1, characterized in that: The cutting structure includes a substrate fixed relative to the base, a movable seat tilted and slidable on the substrate, and a laser cutter installed on the movable seat. During the partial process of synchronous linear motion of the two corresponding side clamps, the side walls of the side clamps contact the side walls of the movable seat and push the movable seat to move.

9. A drawing device for copper tube shaping according to claim 8, characterized in that: The cutting structure also includes a long barrel mounted on the base plate and a piston slidably located inside the long barrel, wherein a fluid is stored inside the long barrel, and a plurality of holes are provided on the piston, and the fluid flows through the holes on the piston on both sides of the piston, and sliding rods are provided on both sides of the piston, and the ends of the sliding rods slide and extend out of the long barrel; Two pulleys are rotatably arranged on the base plate, and a transmission belt is arranged on each of the pulleys, one end of the transmission belt is connected to the movable seat, and the other end of the transmission belt is connected to the end corresponding to the sliding rod; The base plate is provided with a torsion spring for providing elastic force for the rotation of the pulley.

10. A drawing device for copper tube shaping according to claim 1, characterized in that: The die holes on the die structure include a drawing port and a sizing hole, wherein the drawing port is used for shaping the copper tube, and the sizing hole is used for shaping the copper tube.

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