Continuous extrusion process for micro-channel zinc-sprayed aluminum flat tube

Abstract

The invention belongs to the technical field of micro-channel zinc-sprayed aluminum flat pipe machining processes, and particularly relates to a micro-channel zinc-sprayed aluminum flat pipe continuous extrusion process, an extrusion device comprises a rack, traction assemblies and extrusion assemblies, the multiple traction assemblies distributed front and back are arranged on the right portion of the rack, and the multiple extrusion assemblies distributed front and back are arranged on the top of the rack; the positions of the extrusion assemblies correspond to the positions of the traction assemblies in a one-to-one mode, each traction assembly comprises four traction shaft brackets fixedly installed on the right portion of the rack, and the four traction shaft brackets are distributed up and down and front and back. The vacuum suction cup of the traction assembly is adsorbed to the outer surface of the zinc-aluminum-sprayed flat pipe to pull the zinc-aluminum-sprayed flat pipe to move, so that the surface of the zinc-aluminum-sprayed flat pipe cannot generate an inward crumpling acting force, it is guaranteed that the zinc-aluminum-sprayed flat pipe is pulled, meanwhile, crumpling deformation of the zinc-aluminum-sprayed flat pipe cannot be caused, and the pressing machining quality of the zinc-aluminum-sprayed flat pipe is guaranteed; and the reject ratio of pressed products is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of micro-channel zinc-sprayed aluminum flat tube processing, and specifically relates to a micro-channel zinc-sprayed aluminum flat tube continuous extrusion process. Background Art

[0002] Microchannel aluminum flat tube (also known as "parallel flow aluminum flat tube") is a thin-walled porous flat tubular material made of refined aluminum rods through extrusion. It is also called "zinc-sprayed aluminum flat tube" after surface zinc spraying anti-corrosion treatment. It is mainly used in various air-conditioning systems, using new environmentally friendly refrigerant, and is the key material for the new generation of parallel flow microchannel air-conditioning heat exchangers.

[0003] After searching, a Chinese patent with publication number CN109570254A discloses a heat transfer aluminum tube billet hot extrusion rough forming device. The aluminum tube is cooled and anti-oxidation treated by nitrogen after being formed, so that the aluminum tube has a certain toughness and the quality of the aluminum tube is improved. A limit ejector pin is installed on the front end face of the extrusion hammer, which saves a process in the aluminum tube production process, thereby greatly improving production efficiency.

[0004] However, during the use of the above device, the extrusion hammer is likely to cause lateral pressure on the aluminum tube. Since the hardness of the aluminum tube is not high, it is easy to collapse and deform inward when subjected to lateral pressure, thereby affecting the quality of the product after molding. Summary of the invention

[0005] The purpose of the present invention is to provide a continuous extrusion process for a microchannel zinc-sprayed aluminum flat tube to solve the problems raised in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a continuous extrusion process for a microchannel zinc-sprayed aluminum flat tube, comprising:

[0007] Follow these steps:

[0008] S1: The zinc-sprayed aluminum flat tube is sequentially wound around the extrusion grooves on the outer walls of the left and right adjacent extrusion groove wheels through an extrusion device, so that the zinc-sprayed aluminum flat tube is wavy, and the zinc-sprayed aluminum flat tube passes through the inside of the traction component and is wound around the bottom of the outer wall of the guide roller, passes through the inside of the frame, and finally passes out from the left end of the frame and is fixed on the winding rack, and the winding rack is driven to rotate by an external winding device;

[0009] S2: During processing, the reduction motor is first started, and the output shaft of the reduction motor is used to drive the active sprocket to rotate, thereby driving the driven sprocket and the guide roller to rotate under the connection of the power chain. The guide roller drives the active synchronous wheel to rotate together through its central axis, thereby driving the driven synchronous wheel and a traction shaft connected to it to rotate under the connection with the synchronous belt. The traction shaft drives the traction sprocket connected to it to rotate together, so that the traction chain rotates around the upper and lower traction chains under the cooperation of the upper and lower traction sprockets. The traction chain drives multiple micro-cylinder sleeves, telescopic tubes, sliding air needles and vacuum suction cups to rotate together through multiple bow frames. When the vacuum suction cup moves from the top to the bottom during the operation of the traction chain, the end of the vacuum suction cup first contacts the outer surface of the zinc-sprayed aluminum flat tube, so that in the process of pushing the sliding air needle along the telescopic hole toward the direction of the micro-cylinder sleeve under the reaction force of the zinc-sprayed aluminum flat tube on the vacuum suction cup, the sliding air needle drives the spring fixing ring to move together, thereby compressing the compression spring. , reverse pressure is applied through the rebound force generated by the compression spring, thereby ensuring that the vacuum suction cup and the surface of the zinc-sprayed aluminum flat tube are fully fitted to ensure the air tightness between the vacuum suction cup and the zinc-sprayed aluminum flat tube. As the micro-cylinder sleeve continues to move downward, the L-shaped bracket and the push rod drive the L-shaped bracket and the push pin to move downward together, so that the push pin gradually approaches the top of the guide bar. When the push pin moves to the top of the guide bar, the outer wall of the push pin first contacts the inclined guide surface at the top, so that the push pin generates a wedge force in the direction of approaching the micro-cylinder sleeve through the inclined guide surface during the process of continuing to move downward, thereby pushing the piston to move away from the telescopic tube under the connection of the L-shaped bracket and the push rod, so that the reset spring is compressed and stored, and the reset spring generates negative pressure in the area inside the micro-cylinder sleeve located on the left side of the piston during the movement, and transmits it to the inside of the vacuum suction cup through the sliding air needle, so that the vacuum suction cup is firmly adsorbed on the outer surface of the zinc-sprayed aluminum flat tube to pull the zinc-sprayed aluminum flat tube to move downward;

[0010] S3: By loosening the bolts fixing the extrusion upper seat and the extrusion base, the extrusion upper seat can be removed from the top of the extrusion base, and the extrusion groove wheel can be removed. The extrusion groove wheels of other specifications can be replaced to press different types of zinc-sprayed aluminum flat tubes; after the extrusion groove wheel is replaced, the extrusion upper seat is installed on the top of the extrusion base and fixed with bolts again.

[0011] As a preferred solution of the present invention, the extrusion device includes a frame, a traction assembly and an extrusion assembly, the right part of the frame is provided with a plurality of traction assemblies distributed front and back, the top of the frame is provided with a plurality of extrusion assemblies distributed front and back, and the positions of the extrusion assemblies correspond one to one with the positions of the traction assemblies;

[0012] The traction assembly comprises four traction shaft frames fixedly installed on the right part of the frame, the four traction shaft frames are distributed up and down and front and back, wherein two traction shaft bodies distributed left and right are rotatably installed between the front and rear traction shaft frames, and two traction sprockets distributed front and back are fixedly installed on the outer wall of the traction shaft body, wherein the outer peripheries of the two traction sprockets at the upper and lower positions are jointly sleeved with a traction chain, and there are two traction sprockets, and a bow frame is fixedly installed between the two traction sprockets, a micro cylinder sleeve is fixedly installed inside the bow frame, and a telescopic tube is fixedly installed on one side of the micro cylinder sleeve. Telescopic holes are penetrated through the left and right sides of the telescopic tube, and a sliding air needle is slidably installed inside the telescopic hole, and a vacuum suction cup is fixedly installed on the end of the sliding air needle away from the micro cylinder sleeve, and a piston is slidably installed on the inner wall of the micro cylinder sleeve, and a push rod is fixedly installed on the side of the piston close to the vacuum suction cup, and an L-shaped bracket is fixedly installed on the end of the push rod away from the piston, and a push pin is fixedly installed on the side of the L-shaped bracket away from the telescopic tube;

[0013] The extrusion assembly also includes a fixed side plate fixedly installed between the upper and lower traction shaft frames, and a sliding air needle is fixedly installed on a side of the fixed side plate close to the traction chain. The top and bottom of the sliding air needle are both provided with inclined guide surfaces, and the position of the guide bar corresponds to the position of the pull pin.

[0014] As a preferred solution of the present invention, there are multiple bow frames, and the multiple bow frames are distributed at equal distances around the traction chain.

[0015] As a preferred solution of the present invention, the sliding air needle movably passes through the telescopic hole and extends to the interior of the micro cylinder sleeve. A spring fixing ring is fixedly installed on the outer wall of the sliding air needle, and a compression spring is provided on the outer sleeve of the sliding air needle. The compression spring is fixedly installed between the right side surface of the spring fixing ring and the right wall of the telescopic tube.

[0016] As a preferred solution of the present invention, a return spring is fixedly installed between a side of the piston away from the sliding air needle and a right wall of the micro cylinder sleeve.

[0017] As a preferred solution of the present invention, the extrusion assembly includes two front and rear extrusion seats, and a plurality of extrusion groove wheels equidistantly distributed left and right are rotatably installed between the front and rear extrusion seats, and the outer walls of two adjacent left and right extrusion groove wheels abut against each other.

[0018] As a preferred solution of the present invention, two guide shaft frames distributed front and back are fixedly installed on the right part of the frame, the two guide shaft frames are both located at the bottom of the traction assembly, and a guide roller is rotatably installed between the two guide shaft frames.

[0019] As a preferred solution of the present invention, the two adjacent traction shafts are connected by a transmission rod, a driving synchronous wheel is fixedly installed on the front part of the outer wall of the central axis of the guide shaft frame, and a driven synchronous wheel is fixedly installed on the outer wall of one of the traction shafts located at the front, and a synchronous belt is commonly sleeved on the periphery of the driving synchronous wheel and the driven synchronous wheel.

[0020] As a preferred solution of the present invention, a reduction motor is fixedly installed on the right part of the frame, a driving sprocket is fixedly installed on the output shaft of the reduction motor, a driven sprocket is fixedly installed on the front end of the outer wall of the central axis of the guide shaft frame, and a power chain is commonly sleeved on the periphery of the driving sprocket and the driven sprocket.

[0021] As a preferred solution of the present invention, the extrusion seat includes an extrusion upper seat and an extrusion base, the extrusion upper seat is fixedly mounted on the top of the extrusion base by bolts, and the extrusion base is fixedly mounted on the top of the frame by bolts.

[0022] As a preferred solution of the present invention, the vacuum suction cup is fixedly mounted on the end of the sliding air needle by means of threaded connection.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention uses the vacuum suction cup of the traction assembly to adsorb on the outer surface of the zinc-sprayed aluminum flat tube, and pulls the zinc-sprayed aluminum flat tube to move, so that the surface of the zinc-sprayed aluminum flat tube will not generate an inward collapse force. While ensuring that the zinc-sprayed aluminum flat tube is pulled, it will not cause the zinc-sprayed aluminum flat tube to collapse and deform, so as to ensure the quality of the zinc-sprayed aluminum flat tube pressing process and reduce the unqualified rate of pressed products.

[0025] 2. In the present invention, when the vacuum suction cup moves downward from the top during the operation of the traction chain, the end of the vacuum suction cup will first contact the outer surface of the zinc-sprayed aluminum flat tube, so that under the reaction force of the zinc-sprayed aluminum flat tube on the vacuum suction cup, the sliding air needle will push the sliding air needle along the telescopic hole toward the micro cylinder sleeve, and the sliding air needle will drive the spring fixing ring to move together, thereby compressing the compression spring, and applying reverse pressure through the rebound force generated by the compression spring to ensure that the vacuum suction cup is fully fitted with the surface of the zinc-sprayed aluminum flat tube, thereby ensuring the airtightness between the vacuum suction cup and the zinc-sprayed aluminum flat tube, and then ensuring that there is sufficient traction on the zinc-sprayed aluminum flat tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a front view structural schematic diagram of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the traction assembly in the present invention;

[0029] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0030] Figure 5 It is a structural schematic diagram of the traction assembly in the present invention;

[0031] Figure 6 It is a schematic diagram of the planar structure of the traction assembly in the present invention;

[0032] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of part B;

[0033] Figure 8 It is a schematic diagram of the cross-sectional structure of the micro cylinder sleeve and the telescopic tube in the present invention.

[0034] In the figure: 100, frame; 200, traction assembly; 201, traction shaft frame; 202, traction shaft body; 203, traction sprocket; 204, bow frame; 205, micro cylinder sleeve; 206, telescopic tube; 207, telescopic hole; 208, sliding air needle; 209, vacuum suction cup; 2010, spring fixing ring; 2011, compression spring; 2012, piston; 2013, push rod; 2014, L-shaped bracket; 2015, push pin; 20 16. Reset spring; 2017. Fixed side plate; 2018. Guide bar; 2019. Inclined guide surface; 300. Extrusion assembly; 301. Extrusion seat; 30101. Extrusion upper seat; 30102. Extrusion base; 302. Extrusion groove wheel; 401. Guide shaft frame; 402. Guide roller; 501. Active synchronous wheel; 502. Driven synchronous wheel; 503. Synchronous belt; 601. Reducer motor; 602. Active sprocket; 603. Driven sprocket; 604. Power chain. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-Figure 8 The technical solution provided by the present invention specifically includes the following embodiments:

[0037] Embodiment 1

[0038] A microchannel zinc-sprayed aluminum flat tube continuous extrusion process, the extrusion device used includes a frame 100, a traction assembly 200 and an extrusion assembly 300, the right part of the frame 100 is provided with a plurality of traction assemblies 200 distributed front and back, the top of the frame 100 is provided with a plurality of extrusion assemblies 300 distributed front and back, and the position of the extrusion assembly 300 corresponds to the position of the traction assembly 200 one by one;

[0039] The traction assembly 200 includes four traction shaft frames 201 fixedly installed on the right part of the frame 100, and the four traction shaft frames 201 are distributed up and down, front and back, wherein two traction shaft bodies 2002 distributed left and right are rotatably installed between the front and rear traction shaft frames 201, and two traction sprockets 202 distributed front and back are fixedly installed on the outer wall of the traction shaft body 2002, wherein the outer peripheries of the two traction sprockets 202 at the upper and lower positions are jointly sleeved with a traction chain 203, there are two traction sprockets 202, and a bow frame 204 is fixedly installed between the two traction sprockets 202, and the number of bow frames 204 is multiple, and the multiple bow frames 204 are equidistantly distributed around the traction chain 203, and a micro cylinder sleeve 205 is fixedly installed inside the bow frame 204, and a telescopic tube 206 is fixedly installed on one side of the micro cylinder sleeve 205, and the left side of the telescopic tube 206 Telescopic holes 207 are provided through the side and right side, and a sliding air needle 208 is slidably installed inside the telescopic hole 207. A vacuum suction cup 209 is fixedly installed on the end of the sliding air needle 208 away from the micro cylinder sleeve 205. The vacuum suction cup 209 is fixedly installed on the end of the sliding air needle 208 by threaded connection. A piston 2012 is slidably installed on the inner wall of the micro cylinder sleeve 205. A push rod 2013 is fixedly installed on the side of the piston 2012 close to the vacuum suction cup 209. An L-shaped bracket 2014 is fixedly installed on the end of the push rod 2013 away from the piston 2012. A push pin 215 is fixedly installed on the side of the L-shaped bracket 2014 away from the telescopic tube 206. A return spring 2016 is fixedly installed between the side of the piston 2012 away from the sliding air needle 208 and the right wall of the micro cylinder sleeve 205.

[0040] The extrusion assembly 300 also includes a fixed side plate 2017 fixedly installed between the upper and lower traction shaft frames 201, a sliding air needle 208 is fixedly installed on a side of the fixed side plate 2017 close to the traction chain 203, the top and bottom of the sliding air needle 208 are provided with inclined guide surfaces 2019, the position of the guide bar 2018 corresponds to the position of the pin 2015, the sliding air needle 208 movably passes through the telescopic hole 207, and extends to the inside of the micro cylinder sleeve 205, the outer wall of the sliding air needle 208 is fixedly installed with a spring fixing ring 2010, and the outer sleeve of the sliding air needle 208 is provided with a compression spring 2011, and the compression spring 2011 is fixedly installed between the right side of the spring fixing ring 2010 and the right wall of the telescopic tube 206;

[0041] Specifically, the present embodiment rotates the traction shaft 2002 to drive the traction sprocket 202 connected thereto to rotate together, so that the traction chain 203 rotates around the upper and lower traction chains 203 under the cooperation of the upper and lower traction sprockets 202. The traction chain 203 drives multiple micro cylinder sleeves 205, telescopic tubes 206, sliding air needles 208 and vacuum suction cups 209 to operate together through multiple bow frames 204. When the vacuum suction cup 209 moves downward from the top during the operation of the traction chain 203, the end of the vacuum suction cup 209 first contacts the outer surface of the zinc-sprayed aluminum flat tube, thereby In the process of pushing the sliding air needle 208 along the telescopic hole 207 toward the micro cylinder sleeve 205 under the reaction force of the zinc-sprayed aluminum flat tube on the vacuum suction cup 209, the sliding air needle 208 drives the spring fixing ring 2010 to move together, thereby compressing the compression spring 2011, and applying reverse pressure through the rebound force generated by the compression spring 2011 to ensure that the vacuum suction cup 209 is fully fitted with the surface of the zinc-sprayed aluminum flat tube, thereby ensuring the airtightness between the vacuum suction cup 209 and the zinc-sprayed aluminum flat tube. As the micro cylinder sleeve 205 continues to move downward, the piston 2012 and the push rod 2013 are connected. The L-shaped bracket 2014 and the push pin 2015 are driven downward together, so that the push pin 2015 gradually approaches the top of the guide bar 2018. When the push pin 2015 moves to the top of the guide bar 2018, the outer wall of the push pin 2015 first contacts the inclined guide surface 2019 at the top, so that the push pin 2015 generates a wedge force in the direction of approaching the micro cylinder sleeve 205 through the inclined guide surface 2019 during the process of continuing to move downward, thereby pushing the piston 2012 to move away from the telescopic tube 206 under the connection of the L-shaped bracket 2014 and the push rod 2013. , so that the return spring 2016 is compressed and accumulates force, and the return spring 2016 generates negative pressure in the area inside the micro-cylinder sleeve 205 located on the left side of the piston 2012 during the movement, and transmits it to the inside of the vacuum suction cup 209 through the sliding air needle 208, so that the vacuum suction cup 209 is firmly adsorbed on the outer surface of the zinc-sprayed aluminum flat tube to pull the zinc-sprayed aluminum flat tube downward, thereby performing flow extrusion processing on the zinc-sprayed aluminum flat tube. Compared with the existing technology, the deformation of the zinc-sprayed aluminum flat tube can be avoided, so as to ensure the quality of the pressing processing of the zinc-sprayed aluminum flat tube and reduce the unqualified rate of pressed products.

[0042] Embodiment 2

[0043] The extrusion assembly 300 includes two front and rear extrusion seats 301, and a plurality of extrusion groove wheels 302 equidistantly distributed on the left and right are rotatably installed between the front and rear extrusion seats 301. The outer walls of two adjacent extrusion groove wheels 302 on the left and right abut against each other. The extrusion seat 301 includes an extrusion upper seat 30101 and an extrusion base 30102. The extrusion upper seat 30101 is fixedly installed on the top of the extrusion base 30102 by bolts, and the extrusion base 30102 is fixedly installed on the top of the frame 100 by bolts.

[0044] Two guide shaft frames 401 are fixedly installed on the right side of the frame 100 and are distributed front and back. The two guide shaft frames 401 are both located at the bottom of the traction assembly 200, and a guide roller 402 is rotatably installed between the two guide shaft frames 401.

[0045] Specifically, the zinc-sprayed aluminum flat tube is wound around the extrusion grooves on the outer walls of the left and right adjacent extrusion groove wheels 302 in turn to make the zinc-sprayed aluminum flat tube wavy, thereby bending the zinc-sprayed aluminum flat tube up and down multiple times to eliminate the concentrated stress generated by the zinc-sprayed aluminum flat tube during the pressing process. Subsequently, the zinc-sprayed aluminum flat tube is passed through the interior of the traction assembly 200 and then wound around the bottom of the outer wall of the guide roller 402 to optimize the movement trajectory of the zinc-sprayed aluminum flat tube. After passing through the interior of the frame 100, the tube is finally passed out from the left end of the frame 100 and fixed on the winding rack, and the winding rack is driven to rotate by an external winding device.

[0046] Embodiment 3

[0047] The two adjacent traction shaft bodies 2002 are connected by a transmission rod, and a driving synchronous wheel 501 is fixedly installed on the front of the outer wall of the central axis of the guide shaft frame 401, and a driven synchronous wheel 502 is fixedly installed on the outer wall of the traction shaft body 2002 located at the front, and a synchronous belt 503 is commonly sleeved on the periphery of the driving synchronous wheel 501 and the driven synchronous wheel 502;

[0048] A reduction motor 601 is fixedly mounted on the right part of the frame 100, a driving sprocket 602 is fixedly mounted on the output shaft of the reduction motor 601, a driven sprocket 603 is fixedly mounted on the front end of the outer wall of the central shaft of the guide shaft frame 401, and a power chain 604 is sleeved on the periphery of the driving sprocket 602 and the driven sprocket 603;

[0049] Specifically, the output shaft of the reduction motor 601 drives the active sprocket 602 to rotate, thereby driving the driven sprocket 603 and the guide roller 402 to rotate under the connection of the power chain 604. Since the guide roller 402 is rotatably installed through the front and rear two guide shaft frames 401, the stability and smoothness of the guide roller 402 during rotation are ensured. At the same time, the guide roller 402 drives the active synchronous wheel 501 to rotate together through its central axis, thereby driving the driven synchronous wheel 502 to rotate together with a traction shaft body 2002 connected to it under the connection with the synchronous belt 503, and the traction shaft body 2002 drives the traction sprocket 202 connected to it to rotate together.

[0050] In this solution, the zinc-sprayed aluminum flat tube is sequentially wound around the extrusion grooves on the outer walls of the left and right adjacent extrusion groove wheels 302, so that the zinc-sprayed aluminum flat tube is wavy, and the zinc-sprayed aluminum flat tube passes through the interior of the traction assembly 200 and is wound around the bottom of the outer wall of the guide roller 402, and finally passes through the left end of the frame 100 and is fixed on the winding rack, and the winding rack is driven to rotate by an external winding device;

[0051] During processing, the reduction motor 601 is first started, and the output shaft of the reduction motor 601 drives the active sprocket 602 to rotate, thereby driving the driven sprocket 603 and the guide roller 402 to rotate under the connection of the power chain 604. Since the guide roller 402 is rotatably installed through the front and rear two guide shaft frames 401, the stability and smoothness of the guide roller 402 during rotation are ensured. At the same time, the guide roller 402 drives the active synchronous wheel 501 to rotate together through its central axis, thereby driving the driven synchronous wheel 502 to rotate together with a traction shaft body 2002 connected to it under the connection with the synchronous belt 503, and the traction shaft body 2002 drives the traction sprocket 202 connected to it to rotate together, thereby the upper and lower traction sprockets 20 2, the traction chain 203 is operated around the upper and lower traction chains 203, and the traction chain 203 drives the multiple micro cylinder sleeves 205, the telescopic tube 206, the sliding air needle 208 and the vacuum suction cup 209 to operate together through the multiple bow frames 204. When the vacuum suction cup 209 moves downward from the top during the operation of the traction chain 203, the end of the vacuum suction cup 209 first contacts the outer surface of the zinc-sprayed aluminum flat tube, so that the sliding air needle 208 is pushed along the telescopic hole 207 toward the direction of the micro cylinder sleeve 205 under the reaction force of the zinc-sprayed aluminum flat tube on the vacuum suction cup 209. The sliding air needle 208 drives the spring fixing ring 2010 to move together, thereby compressing the compression spring 2011, and the compression spring 2011 generates The rebound force applies reverse pressure to ensure that the vacuum suction cup 209 is fully fitted with the surface of the zinc-sprayed aluminum flat tube, thereby ensuring the airtightness between the vacuum suction cup 209 and the zinc-sprayed aluminum flat tube. As the micro cylinder sleeve 205 continues to move downward, the L-shaped bracket 2014 and the push pin 2015 are driven downward together by the connection between the piston 2012 and the push rod 2013, so that the push pin 2015 gradually approaches the top of the guide bar 2018. When the push pin 2015 moves to the top of the guide bar 2018, the outer wall of the push pin 2015 first contacts the inclined guide surface 2019 at the top, so that the push pin 2015 generates a wedge force in the direction of approaching the micro cylinder sleeve 205 through the inclined guide surface 2019 during the process of continuing to move downward. Therefore, under the connection of the L-shaped bracket 2014 and the push rod 2013, the piston 2012 is pushed to move away from the telescopic tube 206, so that the return spring 2016 is compressed and stored. During the movement, the return spring 2016 generates negative pressure inside the area of ​​the micro-cylinder sleeve 205 located on the left side of the piston 2012, and transmits it to the inside of the vacuum suction cup 209 through the sliding air needle 208, so that the vacuum suction cup 209 is firmly adsorbed on the outer surface of the zinc-sprayed aluminum flat tube to pull the zinc-sprayed aluminum flat tube to move downward, thereby performing flow extrusion processing on the zinc-sprayed aluminum flat tube. Compared with the prior art, the deformation of the zinc-sprayed aluminum flat tube can be avoided, so as to ensure the quality of the pressing processing of the zinc-sprayed aluminum flat tube and reduce the unqualified rate of the pressed products.

[0052] The present invention can remove the extrusion upper seat 30101 from the top of the extrusion base 30102 by loosening the bolts fixing the extrusion upper seat 30101 and the extrusion base 30102, and then remove the extrusion groove wheel 302, and replace it with an extrusion groove wheel 302 of other specifications so as to press different types of zinc-sprayed aluminum flat tubes; after the extrusion groove wheel 302 is replaced, the extrusion upper seat 30101 is installed on the top of the extrusion base 30102 and fixed with bolts again.

[0053] 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 microchannel zinc-sprayed aluminum flat tube continuous extrusion process, characterized in that: The following steps are involved: S1: The zinc-sprayed aluminum flat tube is sequentially wound around the extrusion grooves on the outer walls of the left and right adjacent extrusion groove wheels (302) through an extrusion device, so that the zinc-sprayed aluminum flat tube is wavy, and the zinc-sprayed aluminum flat tube passes through the interior of the traction component (200) and is wound around the bottom of the outer wall of the guide roller (402), passes through the interior of the frame (100), and finally passes out from the left end of the frame (100) and is fixed on the winding rack, and the winding rack is driven to rotate by an external winding device; S2: During processing, the reduction motor (601) is first started, and the output shaft of the reduction motor (601) drives the driving sprocket (602) to rotate, thereby driving the driven sprocket (603) and the guide roller (402) to rotate under the connection of the power chain (604), and the guide roller (402) drives the driving synchronous wheel (501) to rotate together through its central axis, thereby driving the driven synchronous wheel (502) and a traction shaft (2002) connected thereto to rotate under the connection with the synchronous belt (503), and the traction shaft (2002) drives the traction sprocket (202) connected thereto to rotate together, thereby causing the traction chain (203) to rotate around the upper and lower traction sprockets (202) under the cooperation of the upper and lower traction sprockets (202). The guide chain (203) operates, and the traction chain (203) drives multiple micro cylinder sleeves (205), telescopic tubes (206), sliding air needles (208) and vacuum suction cups (209) to operate together through multiple bow frames (204). When the vacuum suction cup (209) moves downward from the top during the operation of the traction chain (203), the end of the vacuum suction cup (209) first contacts the outer surface of the zinc-sprayed aluminum flat tube, so that under the reaction force of the zinc-sprayed aluminum flat tube on the vacuum suction cup (209), the sliding air needle (208) is pushed along the telescopic hole (207) toward the direction of the micro cylinder sleeve (205). In the process, the sliding air needle (208) drives the spring fixing ring (2010) to move together, thereby compressing the compression spring (2011). The rebound force generated by the compression spring (211) is used to apply reverse pressure, thereby ensuring that the vacuum suction cup (209) is fully fitted with the surface of the zinc-sprayed aluminum flat tube, so as to ensure the airtightness between the vacuum suction cup (209) and the zinc-sprayed aluminum flat tube. As the micro-cylinder sleeve (205) continues to move downward, the L-shaped bracket (2014) and the push pin (2015) are driven to move downward together under the connection of the piston (2012) and the push rod (2013), so that the push pin (2015) gradually approaches the top of the guide bar (2018). When the push pin (2015) moves to the top of the guide bar (2018), the outer wall of the push pin (2015) first contacts the inclined guide surface (219) at the top, so that the push pin (2015) continues to move downward. During the downward movement, the inclined guide surface (219) exerts a wedge force on the push pin (2015) in the direction close to the micro cylinder sleeve (205), thereby pushing the piston (212) to move away from the telescopic tube (206) under the connection of the L-shaped bracket (2014) and the push rod (2013), causing the return spring (2016) to compress and accumulate force. During the movement, the return spring (2016) generates negative pressure in the area of ​​the micro cylinder sleeve (205) located to the left of the piston (2012), and transmits the negative pressure to the inside of the vacuum suction cup (209) through the sliding air needle (208), so that the vacuum suction cup (209) is firmly adsorbed on the outer surface of the zinc-sprayed aluminum flat tube to pull the zinc-sprayed aluminum flat tube to move downward; S3: By loosening the bolts fixing the extrusion upper seat (30101) and the extrusion base (30102), the extrusion upper seat (30101) can be removed from the top of the extrusion base (30102), and the extrusion groove wheel (302) can be removed. The extrusion groove wheel (302) of other specifications can be replaced so as to press different types of zinc-sprayed aluminum flat tubes; after the extrusion groove wheel (302) is replaced, the extrusion upper seat (30101) is installed on the top of the extrusion base (30102) and fixed with bolts again.

2. The continuous extrusion process of microchannel zinc-sprayed aluminum flat tube according to claim 1 is characterized by: The extrusion device comprises a frame (100), a traction assembly (200) and an extrusion assembly (300), wherein a plurality of traction assemblies (200) distributed front and back are arranged on the right part of the frame (100), and a plurality of extrusion assemblies (300) distributed front and back are arranged on the top of the frame (100), and the positions of the extrusion assemblies (300) correspond one to one to the positions of the traction assemblies (200); The traction assembly (200) comprises four traction shaft frames (201) fixedly mounted on the right part of the frame (100), the four traction shaft frames (201) being distributed up and down and front and back, wherein two traction shaft bodies (2002) distributed left and right are rotatably mounted between the front and rear traction shaft frames (201), two traction sprockets (202) distributed front and back are fixedly mounted on the outer wall of the traction shaft body (2002), wherein the outer peripheries of the two traction sprockets (202) at the upper and lower positions are jointly sleeved with a traction chain (203), there are two traction sprockets (202), a bow frame (204) is fixedly mounted between the two traction sprockets (202), a micro cylinder sleeve (205) is fixedly mounted inside the bow frame (204), and one side of the micro cylinder sleeve (205) A telescopic tube (206) is fixedly installed on the surface, and telescopic holes (207) are opened through the left and right sides of the telescopic tube (206). A sliding air needle (208) is slidably installed inside the telescopic hole (207), and a vacuum suction cup (209) is fixedly installed on the end of the sliding air needle (208) away from the micro cylinder sleeve (205). A piston (2012) is slidably installed on the inner wall of the micro cylinder sleeve (205), and a push rod (2013) is fixedly installed on the side of the piston (2012 close to the vacuum suction cup (209), and an L-shaped bracket (2014) is fixedly installed on the end of the push rod (2013) away from the piston (2012), and a push pin (215) is fixedly installed on the side of the L-shaped bracket (2014) away from the telescopic tube (206); The extrusion assembly (300) further comprises a fixed side plate (2017) fixedly mounted between the upper and lower traction shaft frames (201), a sliding air needle (208) being fixedly mounted on a side of the fixed side plate (2017) close to the traction chain (203), the top and bottom of the sliding air needle (208) being provided with an inclined guide surface (2019), and the position of the guide bar (2018) corresponds to the position of the detent pin (2015); There are multiple bow frames (204), and the multiple bow frames (204) are distributed at equal distances around the traction chain (203).

3. The continuous extrusion process of a microchannel zinc-sprayed aluminum flat tube according to claim 2 is characterized in that: The sliding air needle (208) movably passes through the telescopic hole (207) and extends to the interior of the micro cylinder sleeve (205). The outer wall of the sliding air needle (208) is fixedly installed with a spring fixing ring (2010), and the outer sleeve of the sliding air needle (208) is provided with a clamping spring (2011). The clamping spring (2011) is fixedly installed between the right side surface of the spring fixing ring (2010) and the right wall of the telescopic tube (206).

4. The continuous extrusion process of a microchannel zinc-sprayed aluminum flat tube according to claim 3 is characterized by: A return spring (2016) is fixedly installed between a side of the piston (2012) away from the sliding air needle (208) and the right wall of the micro cylinder sleeve (205).

5. The continuous extrusion process of a microchannel zinc-sprayed aluminum flat tube according to claim 4 is characterized in that: The extrusion assembly (300) comprises two front and rear extrusion seats (301), and a plurality of extrusion groove wheels (302) equidistantly distributed on the left and right are rotatably mounted between the two front and rear extrusion seats (301), and outer walls of two adjacent extrusion groove wheels (302) on the left and right abut against each other.

6. A continuous extrusion process for a microchannel zinc-sprayed aluminum flat tube according to claim 5, characterized in that: Two guide shaft frames (401) distributed front and back are fixedly installed on the right part of the frame (100), the two guide shaft frames (401) are both located at the bottom of the traction assembly (200), and a guide roller (402) is rotatably installed between the two guide shaft frames (401).

7. The continuous extrusion process of microchannel zinc-sprayed aluminum flat tube according to claim 6 is characterized by: The two traction shaft bodies (2002) adjacent to each other are connected by a transmission rod, a driving synchronous wheel (501) is fixedly installed on the front of the outer wall of the central axis of the guide shaft frame (401), and a driven synchronous wheel (502) is fixedly installed on the outer wall of the traction shaft body (2002) located at the front, and a synchronous belt (503) is commonly sleeved on the periphery of the driving synchronous wheel (501) and the driven synchronous wheel (502).

8. The continuous extrusion process of a microchannel zinc-sprayed aluminum flat tube according to claim 7 is characterized in that: A reduction motor (601) is fixedly mounted on the right part of the frame (100); a driving sprocket (602) is fixedly mounted on the output shaft of the reduction motor (601); a driven sprocket (603) is fixedly mounted on the front end of the outer wall of the central shaft of the guide shaft frame (401); and a power chain (604) is commonly sleeved around the peripheries of the driving sprocket (602) and the driven sprocket (603).

9. A continuous extrusion process for a microchannel zinc-sprayed aluminum flat tube according to claim 8, characterized in that: The extrusion seat (301) comprises an extrusion upper seat (30101) and an extrusion base (30102), wherein the extrusion upper seat (30101) is fixedly mounted on the top of the extrusion base (30102) by means of bolts, and the extrusion base (30102) is fixedly mounted on the top of the frame (100) by means of bolts.

10. A continuous extrusion process for a microchannel zinc-sprayed aluminum flat tube according to claim 9, characterized in that: The vacuum suction cup (209) is fixedly mounted on the end of the sliding air needle (208) by means of a threaded connection.

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