EGR cooler mixing pipe penetrating assembly machine

Abstract

The invention discloses an EGR (exhaust gas recirculation) cooler mixing pipe penetrating assembly machine, which belongs to the technical field of automobile engines and comprises an assembly table, and a front propelling mechanism and a rear propelling mechanism are respectively arranged on the front side and the rear side of the assembly table; the front pushing mechanism comprises a front pushing plate, a first servo electric pushing rod and a third servo electric pushing rod, a first translation frame is fixedly installed at the output end of the third servo electric pushing rod, and a heating mechanism is arranged on the rear side of the front pushing plate; the heating mechanism comprises a connecting shaft, a stator ring, a rotor ring, an electric heating plate and a heat conducting plate. Servo control can be carried out on the front push plate and the rear push plate through the front pushing mechanism and the rear pushing mechanism, so that after cooling fins and nickel sheets are fixed, the cooling fins and the nickel sheets are lifted to enter the flat tubes according to constant opposite force, the assembly accuracy is guaranteed, and the assembly efficiency is improved. And the flat pipe can be preheated in the assembling process through the arranged heating mechanism, so that the assembling resistance is reduced, and the assembling quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile engines, in particular to an EGR cooler mixing pipe threading and assembling machine. Background Art

[0002] EGR cooler, the full name of which is exhaust gas recirculation cooler, is a device used to cool part of the exhaust gas that returns to the engine cylinder. The GR system introduces a small amount of burned exhaust gas into the intake pipe to lower the temperature in the combustion chamber, thereby reducing the nitrogen oxide content in the exhaust gas. Since the temperature of the exhaust gas discharged from the cylinder is very high, it is necessary to connect a cooler to the EGR pipe and introduce coolant to lower the temperature of the exhaust gas reaching the intake pipe. The EGR cooler introduces the engine exhaust gas recirculation into the cooler and cools it with cooling water or air. This can effectively lower the temperature of the EGR gas and reduce its impact on the engine's combustion process. The EGR cooler usually uses the principle of a heat exchanger to exchange heat between the high-temperature EGR gas and the cooling medium, so that the temperature of the EGR gas is reduced to a certain level before entering the engine. Such as Fig.13 As shown, the EGR cooler mixing tube is mainly composed of a flat tube and a heat sink and a nickel sheet inserted in the flat tube. During assembly, the nickel sheet needs to be wrapped around the outside of the heat sink and then inserted into the flat tube. The original single servo and cylinder control tube threading assembly method cannot achieve the "lifting" function. If the cylinder is retracted too slowly, the heat sink will be squeezed and deformed, resulting in damage to the nickel sheet or damage to the heat sink. If the cylinder is retracted too quickly, the heat sink will separate from the nickel sheet, and the nickel sheet cannot wrap the heat sink intact, resulting in damage to the nickel sheet and subsequent high-temperature brazing cold welding. In addition, since the nickel sheet is tightly assembled with the flat tube, the friction is large during the tube threading assembly, which will cause greater wear; therefore, we propose an EGR cooler mixing tube tube threading assembly machine to solve this problem. Summary of the invention

[0003] The object of the present invention is to provide an EGR cooler mixing tube pipe threading and assembly machine to solve the problems raised in the above background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An EGR cooler mixing pipe threading assembly machine comprises: an assembly platform, a front propulsion mechanism and a rear propulsion mechanism are respectively arranged on the front and rear sides of the assembly platform, a conveying mechanism is arranged on both sides of the assembly platform, a positioning mechanism and a conveying mechanism are arranged on the top of the assembly platform, and a clamping mechanism is arranged on the bottom of the assembly platform;

[0006] The front propulsion mechanism comprises: a front push plate, a first servo electric push rod and a third servo electric push rod, the third servo electric push rod is fixedly mounted on the top of the assembly table, a first translation frame is fixedly mounted on the output end of the third servo electric push rod, the first servo electric push rod is fixedly mounted on the front side of the first translation frame, the output end of the first servo electric push rod is fixedly connected to the front push plate, and a heating mechanism is arranged on the rear side of the front push plate;

[0007] The heating mechanism includes: a connecting shaft, a stator ring, a rotor ring, an electric heating plate and a heat conducting plate. A plurality of power generating coils are fixedly installed in the stator ring, a plurality of magnets are arranged on the outside of the rotor ring, two ends of the electric heating plate are electrically connected with wires, the wires are electrically connected to the power generating coils, the rotor ring is fixedly sleeved on the outside of the connecting shaft, and the electric heating plate is fixedly installed in the heat conducting plate.

[0008] Preferably, the top and bottom of the front push plate are provided with mounting grooves, the heating mechanism is provided in two groups, the two heat conducting plates are respectively fixedly mounted on the top and bottom of the front push plate, a mounting seat is fixedly mounted in the mounting groove, and the stator ring is fixedly mounted in the corresponding mounting seat;

[0009] The connecting shaft is rotatably mounted inside the corresponding mounting groove, and abutment wheels are fixedly mounted on both left and right ends of the connecting shaft.

[0010] Preferably, the rear propulsion mechanism includes: a rear push plate, a second servo electric push rod and a fourth servo electric push rod, the rear push plate is fixedly mounted on the output end of the second servo electric push rod, a second translation frame is fixedly mounted on the output end of the second servo electric push rod, the second translation frame is fixedly mounted on the output end of the fourth servo electric push rod, baffles are fixedly mounted on both sides of the top of the assembly table, and the fourth servo electric push rod is fixedly mounted on the top of one of the baffles.

[0011] Preferably, the conveying mechanism comprises: a conveying frame, a conveying motor, a conveying belt and two conveying rollers, the two conveying rollers are rotatably installed in the conveying frame, the conveying belt is transmission-installed on the outside of the two conveying rollers, the conveying motor is fixedly installed on the outside of the conveying frame, and the output end of the conveying motor is fixedly connected to one of the conveying rollers;

[0012] The two conveying racks are respectively fixedly installed on both sides of the assembly platform, the top of the assembly platform is provided with a first step surface and a second step surface, and a limit plate is fixedly installed on the front side of the top of the conveying rack.

[0013] Preferably, the alignment mechanism includes: a mounting frame, a driving motor and two alignment plates, the mounting frame is fixedly mounted on the outer sides of the two conveying frames, a bidirectional screw is rotatably mounted in the mounting frame, the driving motor is fixedly mounted on one side of the mounting frame, the output shaft of the driving motor is fixedly connected to one end of the bidirectional screw, a driving plate is fixedly mounted on the sides of the two alignment plates away from each other, the driving plate is threadedly sleeved on the outer sides of the bidirectional screw, and the driving plate is slidably sleeved on the outer side of the mounting frame.

[0014] Preferably, the transport mechanism comprises: a lifting electric push rod, a first rotating motor, a second rotating motor and a transport plate, a first rotating frame is fixedly mounted on the output end of the lifting electric push rod, the first rotating motor is fixedly mounted in the first rotating frame, a rotating arm is fixedly mounted on the output end of the first rotating motor, a second rotating frame is fixedly mounted on the other end of the rotating arm, the second rotating motor is fixedly mounted in the second rotating frame, the transport plate is fixedly mounted on the output shaft of the second rotating motor, and a plurality of suction cups are fixedly mounted on the bottom of the transport plate;

[0015] A first rotating ring is fixedly installed at the bottom of the rotating arm, and the first rotating ring is rotatably installed in the first rotating frame. A second rotating ring is fixedly installed at the top of the transport plate, and the second rotating ring is rotatably installed in the second rotating frame.

[0016] A mounting arm is fixedly mounted on one side of the lifting electric push rod, and the mounting arm is fixedly mounted on the bottom of the assembly platform.

[0017] Preferably, the clamping mechanism comprises: a cylinder, a movable plate, a clamping motor and two T-shaped frames, the movable plate is slidably connected to the bottom of the assembly table, a pressure sensor is fixedly installed on the front side of the movable plate, the cylinder is fixedly installed on the bottom of the assembly table, the output end of the cylinder is fixedly connected to the front side of the pressure sensor, and the front and rear sides of the T-shaped frame are fixedly installed with clamping plates;

[0018] The clamping motor is fixedly mounted on the bottom of the moving plate, a plurality of rotating arms are fixedly mounted on the output end of the clamping motor, an arc connecting rod is rotatably mounted on the bottom of the T-shaped frame, the other ends of the two arc connecting rods are rotatably mounted on the two ends of the rotating arms respectively, guide rods are fixedly mounted on the left and right sides of the moving plate, and the T-shaped frame is slidably sleeved on the outside of the guide rods;

[0019] A slide rail is fixedly installed at the bottom of the assembly table, the movable plate is slidably sleeved on the outer side of the slide rail, and a controller is fixedly installed on the top of the assembly table, and the controller is connected with the pressure sensor signal.

[0020] Preferably, a fixed frame is fixedly installed on the top of the rear push plate, a square plate is slidably installed in the fixed frame, a top plate is fixedly installed on the front side of the square plate, a return spring is fixedly installed between the top plate and the fixed frame, and a limiting column and a touch button are fixedly installed on the front side of the fixed frame.

[0021] The beneficial effects of the present invention are:

[0022] 1. In the present invention, the EGR cooler mixing pipe threading assembly machine described above drives the first rotating frame to move up and down by starting the lifting electric push rod, starts the first rotating motor to drive the rotating arm to rotate, adjusts the position of the transport plate, and moves the transport plate to the top of the flat pipe stacking place, and then drives the transport plate downward by the lifting electric push rod, so that the suction cup and the flat pipe are released and adsorbed, and then the flat pipe is transported to the top of the assembly table by starting the lifting electric push rod and the first rotating motor, and then starts the second rotating motor to drive the transport plate and the flat pipe to rotate, so as to adjust their angles, and then starts the clamping motor to drive the rotating arm to rotate, and the rotating arm drives the two T-shaped frames to approach each other through two arc-shaped connecting rods, thereby driving the clamping plate to abut against the outside of the flat pipe, and calmly realizes the clamping and fixing of the flat pipe, and then starts the cylinder to drive the moving plate and the flat pipe to move horizontally, so that the flat pipe abuts against the first step surface, so as to realize the fixation of the flat pipe;

[0023] 2. In the present invention, the EGR cooler mixing tube threading and assembly machine is described, by placing the nickel sheet and the heat sink on two conveyor belts respectively, and starting the conveying motor to drive the conveying roller to rotate and drive the conveyor belt to operate, the nickel sheet and the heat sink are conveyed forward until they contact with the limit plate, and then the driving motor is started to drive the bidirectional screw to rotate, and the bidirectional screw drives the two alignment plates to approach each other through the thread transmission with the two driving plates and under the guidance of the mounting frame, so that the nickel sheet and the heat sink are close to each other, and the heat sink is inserted into the inside of the nickel sheet;

[0024] 3. In the present invention, the EGR cooler mixing tube pipe threading and assembly machine described above starts the first servo electric push rod and the second servo electric push rod. The first servo electric push rod drives the front push plate to move backward, so that the front push plate penetrates the flat tube and abuts against the front side of the heat sink. The second servo electric push rod drives the rear push plate to move forward, so that the rear push plate abuts against the rear side of the nickel sheet, and the position of the top plate is higher than the nickel sheet, so that the top plate does not contact the nickel sheet. Then, the first servo electric push rod and the second servo electric push rod are controlled to drive the front push plate and the rear push plate to move forward synchronously, so that the nickel sheet and the heat sink move forward synchronously and are inserted into the flat tube.

[0025] 4. In the present invention, in the EGR cooler mixing tube threading and assembly machine, when the top plate contacts the flat tube, the flat tube restricts the top plate from continuing to move forward until the top plate contacts the touch button, and the touch button is connected to the controller signal. After receiving the touch signal, the controller controls the first servo electric push rod and the second servo electric push rod to stop starting, and controls the clamping motor to rotate in the opposite direction, driving the clamping plate to move in the opposite direction, releasing the clamping of the flat tube, and then transporting the assembled flat tube to the unloading position through the transport mechanism to realize unloading;

[0026] 5. In the present invention, the EGR cooler mixing tube threading and assembly machine monitors the force received by the flat tube through the pressure sensor during the docking process, so as to monitor the friction between the flat tube and the nickel sheet and the heat sink. When the position of the nickel sheet and the heat sink deviates, resulting in a large friction with the flat tube, so that the pressure value sensed by the pressure sensor exceeds the threshold, the controller controls the second servo electric push rod and the fourth servo electric push rod to start synchronously, driving the front push plate and the rear push plate to move horizontally, so as to fine-tune the position of the nickel sheet and the heat sink;

[0027] 6. In the present invention, in the EGR cooler mixing tube threading and assembly machine, when the front push plate moves in the flat tube, the abutment wheel rolls along the inner wall of the flat tube, and drives the rotor ring and multiple magnets to rotate through the connecting shaft, so that current is generated in the power generation coil and the wire, and heat is generated when the current flows through the electric heating plate, and the heat conducting plate is driven to heat, and the inner surface of the flat tube is locally heated by the heat conducting plate, so that the hardness of the flat tube is reduced, the plasticity is increased, and the roughness and contact resistance of the inner surface of the flat tube are reduced. This change helps to more easily insert the nickel sheet and the heat sink into the flat tube during the assembly process, and the heat conducting plate expands when heated, so that the flat tube is slightly deformed from the inside to the outside, so that the gap between the nickel sheet and the heat sink and the flat tube is increased, thereby reducing the resistance during assembly;

[0028] 7. In the present invention, the EGR cooler mixing tube pipe threading assembly machine can servo-control the front push plate and the rear push plate through the front push mechanism and the rear push mechanism, so that after the heat sink and the nickel plate are fixed, the heat sink and the nickel plate can be lifted into the flat tube according to a constant opposite force to ensure assembly accuracy, and the flat tube can be preheated during the assembly process through the heating mechanism to reduce assembly resistance and improve assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional structural schematic diagram of an EGR cooler mixing tube threading and assembly machine proposed by the present invention;

[0030] Figure 2 for Figure 1 A partial enlarged view of part A;

[0031] Figure 3 for Figure 1 A partial enlarged view of part B;

[0032] Figure 4 A schematic diagram of the three-dimensional structure of an EGR cooler mixing tube threading and assembly machine proposed by the present invention from another perspective;

[0033] Figure 5 for Figure 4 A partial enlarged view of part C in the middle;

[0034] Figure 6 A cross-sectional structural schematic diagram of an EGR cooler mixing tube threading and assembly machine proposed by the present invention;

[0035] Figure 7 for Figure 6 A partial enlarged view of part D in the middle;

[0036] Figure 8 A partial three-dimensional structural schematic diagram of an EGR cooler mixing tube threading and assembly machine proposed by the present invention;

[0037] Fig. 9 This is a schematic diagram of the three-dimensional structure of the transport plate and the suction cup proposed by the present invention;

[0038] Fig.10 This is a schematic diagram of the three-dimensional structure of the heating mechanism proposed by the present invention;

[0039] Fig.11 It is a partial three-dimensional structural schematic diagram of the heating mechanism proposed by the present invention;

[0040] Fig.12 This is a schematic diagram of the three-dimensional structure of the transport mechanism proposed by the present invention;

[0041] Fig.13 A three-dimensional diagram of the EGR cooler mixing pipe.

[0042] In the figure: 1. assembly table; 101. baffle; 102. first step surface; 103. second step surface; 2. front push plate; 201. first translation frame; 202. first servo electric push rod; 203. third servo electric push rod; 3. rear push plate; 301. second translation frame; 302. second servo electric push rod; 303. fourth servo electric push rod; 4. conveying mechanism; 401. conveying frame; 402. conveyor belt; 403. conveying roller; 404. conveying motor; 5. transporting mechanism; 501. lifting electric push rod; 502. first rotating frame; 503. first rotating motor; 504. first rotating ring; 505. rotating arm; 506. second rotating frame; 507. second rotating motor; 508. second rotating ring; 509. transporting plate; 510. suction cup; 6. clamping mechanism; 601, clamping plate; 602, T-frame; 603, guide rod; 604, arc connecting rod; 605, rotating arm; 606, clamping motor; 607, cylinder; 608, pressure sensor; 609, moving plate; 610, slide rail; 7, alignment mechanism; 701, mounting frame; 702, driving plate; 703, alignment plate; 704, bidirectional screw; 705, driving motor; 8, top plate; 801, touch button; 802, fixing frame; 803, square plate; 804, reset spring; 9, stator ring; 901, generating coil; 902, wire; 903, mounting seat; 904, electric heating plate; 10, heat conducting plate; 11, magnet; 12, rotor ring; 13, connecting shaft; 14, abutment wheel; 15, controller; 100, flat tube; 200, nickel sheet; 300, heat sink. DETAILED DESCRIPTION

[0043] 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.

[0044] Reference Figure 1 - Fig.13 , an EGR cooler mixing pipe threading assembly machine, comprising: an assembly platform 1, a front pushing mechanism and a rear pushing mechanism are respectively arranged on the front and rear sides of the assembly platform 1, a conveying mechanism 4 is arranged on both sides of the assembly platform 1, a positioning mechanism 7 and a conveying mechanism 5 are arranged on the top of the assembly platform 1, and a clamping mechanism 6 is arranged on the bottom of the assembly platform 1;

[0045] The front push mechanism includes: a front push plate 2, a first servo electric push rod 202 and a third servo electric push rod 203, the third servo electric push rod 203 is fixedly installed on the top of the assembly table 1, the first translation frame 201 is fixedly installed on the output end of the third servo electric push rod 203, the first servo electric push rod 202 is fixedly installed on the front side of the first translation frame 201, the output end of the first servo electric push rod 202 is fixedly connected to the front push plate 2, and a heating mechanism is arranged on the rear side of the front push plate 2;

[0046] The heating mechanism includes: a connecting shaft 13, a stator ring 9, a rotor ring 12, an electric heating plate 904 and a heat conducting plate 10. A plurality of power generating coils 901 are fixedly installed in the stator ring 9, a plurality of magnets 11 are arranged on the outside of the rotor ring 12, both ends of the electric heating plate 904 are electrically connected with wires 902, the wires 902 are electrically connected to the power generating coils 901, the rotor ring 12 is fixedly sleeved on the outside of the connecting shaft 13, and the electric heating plate 904 is fixedly installed in the heat conducting plate 10.

[0047] In this embodiment, mounting grooves are provided at the top and bottom of the front push plate 2, and the heating mechanism is provided in two groups. Two heat conducting plates 10 are respectively fixedly installed at the top and bottom of the front push plate 2, and mounting seats 903 are fixedly installed in the mounting grooves, and the stator ring 9 is fixedly installed in the corresponding mounting seats 903;

[0048] The connecting shaft 13 is rotatably installed inside the corresponding installation groove, and abutment wheels 14 are fixedly installed on both ends of the connecting shaft 13. The abutment wheel 14 located at the top is flush with the upper surface of the flat tube 100, and the abutment wheel 14 located at the bottom is flush with the lower surface of the flat tube 100.

[0049] In this embodiment, the rear propulsion mechanism includes: a rear push plate 3, a second servo electric push rod 302 and a fourth servo electric push rod 303. The rear push plate 3 is fixedly mounted on the output end of the second servo electric push rod 302. The second translation frame 301 is fixedly mounted on the output end of the second servo electric push rod 302. The second translation frame 301 is fixedly mounted on the output end of the fourth servo electric push rod 303. Baffles 101 are fixedly mounted on both sides of the top of the assembly table 1. The fourth servo electric push rod 303 is fixedly mounted on the top of one of the baffles 101.

[0050] In this embodiment, the conveying mechanism 4 includes: a conveying frame 401, a conveying motor 404, a conveying belt 402 and two conveying rollers 403, the two conveying rollers 403 are rotatably installed in the conveying frame 401, the conveying belt 402 is transmission-installed on the outside of the two conveying rollers 403, the conveying motor 404 is fixedly installed on the outside of the conveying frame 401, and the output end of the conveying motor 404 is fixedly connected to one of the conveying rollers 403;

[0051] The two conveying racks 401 are fixedly installed on both sides of the assembly platform 1 , respectively. The top of the assembly platform 1 is provided with a first step surface 102 and a second step surface 103 . A limit plate is fixedly installed on the top front side of the conveying rack 401 .

[0052] In this embodiment, the alignment mechanism 7 includes: a mounting frame 701, a driving motor 705 and two alignment plates 703. The mounting frame 701 is fixedly installed on the outer sides of the two conveying frames 401. A bidirectional screw 704 is rotatably installed in the mounting frame 701. The driving motor 705 is fixedly installed on one side of the mounting frame 701. The output shaft of the driving motor 705 is fixedly connected to one end of the bidirectional screw 704. The two alignment plates 703 are fixedly installed with a driving plate 702 on the sides away from each other. The driving plate 702 is threadedly sleeved on the outer sides of the bidirectional screw 704, and the driving plate 702 is slidably sleeved on the outer side of the mounting frame 701.

[0053] In this embodiment, the transport mechanism 5 includes: a lifting electric push rod 501, a first rotating motor 503, a second rotating motor 507 and a transport plate 509, a first rotating frame 502 is fixedly installed on the output end of the lifting electric push rod 501, the first rotating motor 503 is fixedly installed in the first rotating frame 502, a rotating arm 505 is fixedly installed on the output end of the first rotating motor 503, a second rotating frame 506 is fixedly installed on the other end of the rotating arm 505, the second rotating motor 507 is fixedly installed in the second rotating frame 506, the transport plate 509 is fixedly installed on the output shaft of the second rotating motor 507, and a plurality of suction cups 510 are fixedly installed on the bottom of the transport plate 509;

[0054] A first rotating ring 504 is fixedly installed at the bottom of the rotating arm 505, and the first rotating ring 504 is rotatably installed in the first rotating frame 502. A second rotating ring 508 is fixedly installed at the top of the transport plate 509, and the second rotating ring 508 is rotatably installed in the second rotating frame 506.

[0055] A mounting arm is fixedly mounted on one side of the lifting electric push rod 501 , and the mounting arm is fixedly mounted on the bottom of the assembly platform 1 to fix the lifting electric push rod 501 .

[0056] In this embodiment, the clamping mechanism 6 includes: a cylinder 607, a moving plate 609, a clamping motor 606 and two T-shaped frames 602, the moving plate 609 is slidably connected to the bottom of the assembly platform 1, a pressure sensor 608 is fixedly installed on the front side of the moving plate 609, the cylinder 607 is fixedly installed on the bottom of the assembly platform 1, the output end of the cylinder 607 is fixedly connected to the front side of the pressure sensor 608, and the front and rear sides of the T-shaped frame 602 are fixedly installed with clamping plates 601;

[0057] The clamping motor 606 is fixedly installed at the bottom of the moving plate 609, and a plurality of rotating arms 605 are fixedly installed on the output end of the clamping motor 606. An arc connecting rod 604 is rotatably installed at the bottom of the T-shaped frame 602, and the other ends of the two arc connecting rods 604 are rotatably installed at the two ends of the rotating arms 605, respectively. Guide rods 603 are fixedly installed on both sides of the moving plate 609, and the T-shaped frame 602 is slidably sleeved on the outer side of the guide rod 603, so as to guide the moving plate 609;

[0058] A slide rail 610 is fixedly installed at the bottom of the assembly platform 1 , and the movable plate 609 is slidably sleeved on the outer side of the slide rail 610 . A controller 15 is fixedly installed on the top of the assembly platform 1 , and the controller 15 is connected to the pressure sensor 608 for signal.

[0059] In this embodiment, a fixed frame 802 is fixedly installed on the top of the rear push plate 3, a square plate 803 is slidably installed in the fixed frame 802, a top plate 8 is fixedly installed on the front side of the square plate 803, a return spring 804 is fixedly installed between the top plate 8 and the fixed frame 802, and a limiting column and a touch button 801 are fixedly installed on the front side of the fixed frame 802.

[0060] In this embodiment, when in use, the lifting electric push rod 501 is started to drive the first rotating frame 502 to move up and down, the first rotating motor 503 is started to drive the rotating arm 505 to rotate, and the position of the transport plate 509 is adjusted, and the transport plate 509 is moved to the top of the stacking of the flat tubes 100, and then the lifting electric push rod 501 drives the transport plate 509 to move downward, so that the suction cup 510 is released from the flat tube 100 and adsorbed, and then the lifting electric push rod 501 and the first rotating motor 503 are started to transport the flat tube 100 to the top of the assembly table 1. Then, the second rotating motor 507 is started to drive the transport plate 509 and the flat tube 100 to rotate, so as to adjust their angles. Then, the clamping motor 606 is started to drive the rotating arm 605 to rotate. The rotating arm 605 drives the two T-shaped frames 602 to approach each other through the two arc-shaped connecting rods 604, so as to drive the clamping plate 601 to abut against the outer side of the flat tube 100, so as to achieve the clamping and fixing of the flat tube 100. Then, the cylinder 607 is started to drive the moving plate 609 and the flat tube 100 to move horizontally, so that the flat tube 100 abuts against the first step surface 102, so as to achieve the fixing of the flat tube 100.

[0061] The nickel sheet 200 and the heat sink 300 are placed on two conveyor belts 402 respectively, and the conveyor motor 404 is started to drive the conveyor roller 403 to rotate and drive the conveyor belt 402 to operate, so that the nickel sheet 200 and the heat sink 300 are conveyed forward until they contact with the limit plate, and then the driving motor 705 is started to drive the bidirectional screw 704 to rotate, and the bidirectional screw 704 drives the two alignment plates 703 to approach each other through the thread transmission with the two driving plates 702 and under the guidance of the mounting frame 701, so that the nickel sheet 200 and the heat sink 300 are approached to each other, and the heat sink 300 is inserted into the inside of the nickel sheet 200;

[0062] By starting the first servo electric push rod 202 and the second servo electric push rod 302, the first servo electric push rod 202 drives the front push plate 2 to move backward, so that the front push plate 2 passes through the flat tube 100 and abuts against the front side of the heat sink 300, and the second servo electric push rod 302 drives the rear push plate 3 to move forward, so that the rear push plate 3 abuts against the rear side of the nickel sheet 200, and the position of the top plate 8 is higher than the nickel sheet 200, so that the top plate 8 does not contact the nickel sheet 200, and then the first servo electric push rod 202 and the second servo electric push rod 302 are controlled to drive the front push plate 2 and the rear push plate 3 to move forward synchronously, so that the nickel sheet 200 and the heat sink 300 move forward synchronously and are inserted into the flat tube 100;

[0063] When the top plate 8 contacts the flat tube 100, the flat tube 100 restricts the top plate 8 from continuing to move forward until the top plate 8 contacts the touch button 801. The touch button 801 is connected to the controller 15 by signal. After receiving the touch signal, the controller 15 controls the first servo electric push rod 202 and the second servo electric push rod 302 to stop starting, and controls the clamping motor 606 to rotate in the opposite direction, driving the clamping plate 601 to move in the opposite direction, releasing the clamping of the flat tube 100, and then the assembled flat tube 100 is transported to the unloading position by the transport mechanism 5 to realize unloading.

[0064] During the docking process, the force received by the flat tube 100 is monitored by the pressure sensor 608, so that the friction between the flat tube 100 and the nickel sheet 200 and the heat sink 300 can be monitored. When the position of the nickel sheet 200 and the heat sink 300 deviates, resulting in a large friction with the flat tube 100, so that the pressure value sensed by the pressure sensor 608 exceeds the threshold, the controller 15 controls the second servo electric push rod 302 and the fourth servo electric push rod 303 to start synchronously, driving the front push plate 2 and the rear push plate 3 to move horizontally, so as to fine-tune the position of the nickel sheet 200 and the heat sink 300;

[0065] When the front push plate 2 moves in the flat tube 100, the abutment wheel 14 rolls along the inner wall of the flat tube 100, and drives the rotor ring 12 and the plurality of magnets 11 to rotate through the connecting shaft 13, thereby generating current in the power generation coil 901 and the wire 902, and generating heat when the current flows through the electric heating plate 904, and driving the heat conducting plate 10 to heat, and locally heating the inner surface of the flat tube 100 through the heat conducting plate 10, so that the hardness of the flat tube 100 is reduced, the plasticity is increased, and the roughness and contact resistance of the inner surface of the flat tube 100 are reduced. This change helps to more easily insert the nickel sheet 200 and the heat sink 300 into the flat tube 100 during the assembly process, and the heat conducting plate 10 expands when heated, so that the flat tube 100 is slightly deformed from the inside to the outside, so that the gap between the nickel sheet 200 and the heat sink 300 and the flat tube 100 is increased, thereby reducing the resistance during assembly;

[0066] It should be noted that the principle of the magnet 11 rotating and generating induced current in the generating coil 901 is similar to that of a generator. When a part of the conductor of a closed circuit moves to cut the magnetic flux lines in a magnetic field, current will be generated in the conductor. This current generated by electromagnetic induction is called induced current. The electric heating plate 904 itself has resistance. When the induced current passes through it, it can convert electrical energy into thermal energy to achieve heating.

[0067] The above is a detailed introduction to the EGR cooler mixing tube threading and assembly machine provided by the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An EGR cooler mixing tube threading and assembly machine, characterized in that: include: An assembly platform (1), wherein a front propulsion mechanism and a rear propulsion mechanism are respectively arranged on the front and rear sides of the assembly platform (1), a conveying mechanism (4) is arranged on both sides of the assembly platform (1), a positioning mechanism (7) and a transport mechanism (5) are arranged on the top of the assembly platform (1), and a clamping mechanism (6) is arranged on the bottom of the assembly platform (1); The front propulsion mechanism comprises: a front push plate (2), a first servo electric push rod (202) and a third servo electric push rod (203); the third servo electric push rod (203) is fixedly mounted on the top of the assembly platform (1); a first translation frame (201) is fixedly mounted on the output end of the third servo electric push rod (203); the first servo electric push rod (202) is fixedly mounted on the front side of the first translation frame (201); the output end of the first servo electric push rod (202) is fixedly connected to the front push plate (2); and a heating mechanism is arranged on the rear side of the front push plate (2); The heating mechanism comprises: a connecting shaft (13), a stator ring (9), a rotor ring (12), an electric heating plate (904) and a heat conducting plate (10); a plurality of power generation coils (901) are fixedly installed in the stator ring (9); a plurality of magnets (11) are arranged on the outside of the rotor ring (12); two ends of the electric heating plate (904) are electrically connected to wires (902); the wires (902) are electrically connected to the power generation coils (901); the rotor ring (12) is fixedly sleeved on the outside of the connecting shaft (13); and the electric heating plate (904) is fixedly installed in the heat conducting plate (10).

2. The EGR cooler mixing tube threading and assembly machine according to claim 1, characterized in that: The top and bottom of the front push plate (2) are both provided with mounting grooves, the heating mechanism is arranged in two groups, the two heat conducting plates (10) are respectively fixedly mounted on the top and bottom of the front push plate (2), a mounting seat (903) is fixedly mounted in the mounting groove, and the stator ring (9) is fixedly mounted in the corresponding mounting seat (903); The connecting shaft (13) is rotatably mounted inside the corresponding mounting groove, and abutment wheels (14) are fixedly mounted on both left and right ends of the connecting shaft (13).

3. The EGR cooler mixing pipe threading and assembly machine according to claim 1, characterized in that: The rear propulsion mechanism comprises: a rear push plate (3), a second servo electric push rod (302) and a fourth servo electric push rod (303); the rear push plate (3) is fixedly mounted on the output end of the second servo electric push rod (302); a second translation frame (301) is fixedly mounted on the output end of the second servo electric push rod (302); the second translation frame (301) is fixedly mounted on the output end of the fourth servo electric push rod (303); baffles (101) are fixedly mounted on both sides of the top of the assembly platform (1); and the fourth servo electric push rod (303) is fixedly mounted on the top of one of the baffles (101).

4. The EGR cooler mixing tube threading and assembly machine according to claim 1, characterized in that: The conveying mechanism (4) comprises: a conveying frame (401), a conveying motor (404), a conveying belt (402) and two conveying rollers (403), the two conveying rollers (403) are both rotatably mounted in the conveying frame (401), the conveying belt (402) is transmission-mounted on the outside of the two conveying rollers (403), the conveying motor (404) is fixedly mounted on the outside of the conveying frame (401), and the output end of the conveying motor (404) is fixedly connected to one of the conveying rollers (403); The two conveying racks (401) are respectively fixedly mounted on two sides of the assembly platform (1); the top of the assembly platform (1) is provided with a first step surface (102) and a second step surface (103); and a limit plate is fixedly mounted on the front side of the top of the conveying rack (401).

5. The EGR cooler mixing pipe threading and assembly machine according to claim 1, characterized in that: The alignment mechanism (7) comprises: a mounting frame (701), a driving motor (705) and two alignment plates (703); the mounting frame (701) is fixedly mounted on the outer sides of the two conveying frames (401); a bidirectional screw (704) is rotatably mounted in the mounting frame (701); the driving motor (705) is fixedly mounted on one side of the mounting frame (701); an output shaft of the driving motor (705) is fixedly connected to one end of the bidirectional screw (704); a driving plate (702) is fixedly mounted on the sides of the two alignment plates (703) that are away from each other; the driving plate (702) is threadedly sleeved on the outer sides of the bidirectional screw (704), and the driving plate (702) is slidably sleeved on the outer sides of the mounting frame (701).

6. The EGR cooler mixing pipe threading and assembly machine according to claim 1, characterized in that: The transport mechanism (5) comprises: a lifting electric push rod (501), a first rotating motor (503), a second rotating motor (507) and a transport plate (509); a first rotating frame (502) is fixedly mounted on the output end of the lifting electric push rod (501); the first rotating motor (503) is fixedly mounted in the first rotating frame (502); a rotating arm (505) is fixedly mounted on the output end of the first rotating motor (503); a second rotating frame (506) is fixedly mounted on the other end of the rotating arm (505); the second rotating motor (507) is fixedly mounted in the second rotating frame (506); the transport plate (509) is fixedly mounted on the output shaft of the second rotating motor (507); and a plurality of suction cups (510) are fixedly mounted on the bottom of the transport plate (509); A first rotating ring (504) is fixedly mounted on the bottom of the rotating arm (505), and the first rotating ring (504) is rotatably mounted in the first rotating frame (502); a second rotating ring (508) is fixedly mounted on the top of the transport plate (509), and the second rotating ring (508) is rotatably mounted in the second rotating frame (506); A mounting arm is fixedly mounted on one side of the lifting electric push rod (501), and the mounting arm is fixedly mounted on the bottom of the assembly platform (1).

7. The EGR cooler mixing tube threading and assembly machine according to claim 1, characterized in that: The clamping mechanism (6) comprises: a cylinder (607), a movable plate (609), a clamping motor (606) and two T-shaped frames (602); the movable plate (609) is slidably connected to the bottom of the assembly platform (1); a pressure sensor (608) is fixedly installed on the front side of the movable plate (609); the cylinder (607) is fixedly installed on the bottom of the assembly platform (1); the output end of the cylinder (607) is fixedly connected to the front side of the pressure sensor (608); and clamping plates (601) are fixedly installed on both the front and rear sides of the T-shaped frame (602); The clamping motor (606) is fixedly mounted on the bottom of the moving plate (609); a plurality of rotating arms (605) are fixedly mounted on the output end of the clamping motor (606); an arc-shaped connecting rod (604) is rotatably mounted on the bottom of the T-shaped frame (602); the other ends of the two arc-shaped connecting rods (604) are rotatably mounted on the two ends of the rotating arms (605); guide rods (603) are fixedly mounted on the left and right sides of the moving plate (609); and the T-shaped frame (602) is slidably sleeved on the outer sides of the guide rods (603); A slide rail (610) is fixedly installed at the bottom of the assembly platform (1), and the movable plate (609) is slidably sleeved on the outer side of the slide rail (610). A controller (15) is fixedly installed at the top of the assembly platform (1), and the controller (15) is connected to the pressure sensor (608) for signal.

8. The EGR cooler mixing pipe threading and assembly machine according to claim 3, characterized in that: A fixed frame (802) is fixedly installed on the top of the rear push plate (3), a square plate (803) is slidably installed in the fixed frame (802), a top plate (8) is fixedly installed on the front side of the square plate (803), a return spring (804) is fixedly installed between the top plate (8) and the fixed frame (802), and a limit column and a touch button (801) are fixedly installed on the front side of the fixed frame (802).

Images