Speed chain production line and production method

Abstract

The invention discloses a speed chain production line and a production method.The speed chain production line comprises a conveying line assembly, a buffering and blocking assembly, a clamping tool assembly, an eight-station transplanting assembly and a nitrogen filling and water supplementing assembly, the conveying line assembly is used for conveying tool plates, and the buffering and blocking assembly is installed on the conveying line assembly and buffers and blocks the tool plates; the clamping tool assembly is installed on the tool plate and used for clamping and positioning a workpiece, the eight-station transplanting assembly is installed on the conveying line assembly and used for directionally transplanting the tool plate so that the workpiece can be welded, and the nitrogen charging and water supplementing assembly corresponds to the eight-station transplanting assembly and used for charging nitrogen and supplementing water into the clamping tool assembly and the workpiece. Through the structural design, the clamping precision of the four-way valve and the pipe fitting of the four-way valve can be improved, the welding quality and the welding speed between the four-way valve and the pipe fitting are improved, the situation that the welding quality is affected due to the fact that the temperature is too high in the welding process of the four-way valve is avoided, the requirement for flow line production is met, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of double-speed chain production lines, and particularly relates to a double-speed chain production line and a production method. Background Art

[0002] A production line composed of a double-speed chain pipeline is usually called: a self-flowing conveying system double-speed chain conveyor, which is used for material conveying in an assembly and processing production line. Its conveying principle is to utilize the speed-increasing function of the double-speed chain to make the tooling board carrying goods on it run quickly, and complete accumulation actions and functions such as shifting, transposition, and line transfer through corresponding instructions. Multiple workstations are usually set on the double-speed chain production line, and each workstation completes different production operations. Driven by the double-speed chain drive system, the work board moves to the next workstation for production operations.

[0003] A four-way valve is a control valve with four oil ports. The four-way valve is an indispensable component in refrigeration equipment. Its working principle is that when the solenoid valve coil is in a power-off state, the pilot spool moves left under the drive of the compression spring on the right, and the high-pressure gas enters the capillary and then enters the right piston chamber. On the other hand, the gas in the left piston chamber is discharged. Due to the pressure difference between the two ends of the piston, the piston and the main spool move left, making the exhaust pipe communicate with the outdoor unit connection pipe, and the other two connection pipes communicate with each other to form a refrigeration cycle.

[0004] During the production of the four-way valve, corresponding pipe fittings need to be installed at the interfaces of the four-way valve, and then welded. Since the installation positions and bending angles of the four-way valve pipe fittings are different, the efficiency is low when manually placing, clamping, rotating, etc. the four-way valve and its pipe fittings. Moreover, after the four-way valve and the pipe fittings are installed, they need to be welded, and the welding quality and speed also affect the production efficiency. Therefore, there is an urgent need for a double-speed chain production line to meet the production requirements of the pipeline and improve the production efficiency of the four-way valve. Summary of the Invention

[0005] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art, and provide a double-speed chain production line, which can not only improve the clamping accuracy of the four-way valve and its pipe fittings, but also improve the welding quality and welding speed between the four-way valve and the pipe fittings, and at the same time avoid affecting the welding quality due to excessive temperature during the welding process of the four-way valve, meet the requirements of pipeline production, and improve the processing efficiency.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A double-speed chain production line, characterized in that it includes

[0008] A conveying line assembly for conveying a tooling board;

[0009] The clamping fixture assembly is installed on the fixture plate and is used for clamping and positioning the workpiece; the eight-station transfer assembly is installed on the conveyor line assembly, and the eight-station transfer assembly is used for directionally transferring the fixture plate so as to weld the workpiece in the clamping fixture assembly.

[0010] Further, the conveyor line assembly includes a first conveyor line and a second conveyor line. The first conveyor line and the second conveyor line enclose to form a production line. Both the first conveyor line and the second conveyor line include a power transmission mechanism and a frame. The power transmission mechanism is installed on the frame, and the power transmission mechanism provides power for the fixture plate. The eight-station transfer assembly is installed on the second conveyor line. The first conveyor line further includes a reversing mechanism and a rotating mechanism. The reversing mechanism is used for reversely transporting the fixture plate to the second conveyor line, and the rotating mechanism is used for rotating the fixture plate.

[0011] Further, the power transmission mechanism includes a driving motor, a driving shaft, a driving gear, a driven gear and a chain. The driving motor is connected to the driving shaft through a coupling. The driving shaft is rotatably installed on the frame. The driving gear is installed on the driving shaft. The driven gear is rotatably installed on the installation shaft, and the installation shaft is installed on the frame. The chain is installed on the driving gear and the driven gear.

[0012] Further, both the reversing mechanism and the rotating mechanism include a lifting module. The reversing mechanism includes a transplanting module. The transplanting module is used for controlling the reverse movement of the fixture plate. The rotating mechanism includes a rotating module. The rotating module is used for rotating the fixture plate. The lifting module is used for pushing the transplanting module or the rotating module to lift and lower.

[0013] Further, the lifting module includes a mounting seat one, a lifting seat, a lifting cylinder, a guiding seat and a guiding rod. The lifting cylinder is installed on the mounting seat one. The lifting cylinder is connected to the lifting seat. The lifting cylinder pushes the lifting seat to lift and lower. The transplanting mechanism or the rotating mechanism is installed on the lifting seat. The guiding seat is fixed on the mounting seat one. The guiding seat penetrates through the mounting seat one. The guiding rod is installed on the lifting seat through a fixing seat one. The guiding rod passes through the guiding seat and slides along the guiding seat.

[0014] Further, the transplanting module includes rollers and a transplanting motor. The transplanting motor is connected to the rollers. The transplanting motor drives the rollers to rotate. There are multiple rollers. The multiple rollers are installed on the lifting seat. The rollers are provided with tooth parts. Synchronous rotation between two adjacent rollers is achieved through the tooth parts combined with a belt.

[0015] Further, the rotating module includes a rotating motor, a rotating seat, a fixing seat two and a limiting plate. The fixing seat two is fixed on the lifting seat. The rotating motor is installed on the fixing seat two. The rotating seat is installed in the fixing seat two. The rotating motor is connected to the rotating seat. The rotating motor controls the rotation of the rotating seat. The limiting plate is installed on the rotating seat. The limiting plate rotates synchronously with the rotating seat. The limiting plate is provided with a limiting pillar one. The limiting plate is used for placing the fixture plate and limiting the fixture plate through the limiting pillar one.

[0016] Further, it further includes a buffer blocking component. The buffer blocking component is installed on the conveyor line component and is used for buffering and blocking the tooling plate. The buffer blocking component includes a hydraulic cylinder, a second mounting seat, a blocking member, and a third fixed seat. The second mounting seat is connected to the hydraulic cylinder, and the hydraulic cylinder is installed on the third fixed seat. The hydraulic cylinder is used to push the second mounting seat to move up and down. The blocking member is rotatably installed on the second mounting seat and is used to block the work plate.

[0017] Further, the second mounting seat is provided with an installation space, and a hinge shaft is installed through the installation space. One end of the blocking member is rotatably installed on the hinge shaft, a spring is sleeved on the hinge shaft, a roller is rotatably installed at the other end of the blocking member, a limiting member is installed on the second mounting seat, and a limiting post is provided on the blocking member, and the limiting post abuts against the limiting member.

[0018] Further, the clamping tooling component includes a welding cooling mechanism, a pipe fitting clamping mechanism, and a pipe fitting clamping and holding mechanism. The welding cooling mechanism is used to place the workpiece and inject a cooling medium, and when the workpiece is welded, it cools and protects the workpiece. The pipe fitting clamping mechanism is used to clamp and position the interface of the workpiece and position the pipe fittings of the workpiece. The pipe fitting clamping and holding mechanism is connected to the welding cooling mechanism and is used to clamp and hold the pipe fittings of the workpiece.

[0019] Further, the welding cooling mechanism includes a water tank, a water reservoir, a valve, a bottom plate, and a support frame. The water reservoir is located inside the water tank, a first water outlet hole is provided at the bottom of the water reservoir, a drainage box is connected below the water tank, the drainage box is provided with a drainage hole, and the drainage hole is communicated with the first water outlet hole. The valve is arranged in the drainage box and is used to control the on-off between the first water outlet hole and the drainage hole. The bottom plate is connected to the water tank through the support frame and is used to support the water tank and the water reservoir.

[0020] Further, the water reservoir is provided with a water replenishing hole and a support block. The water replenishing hole is used to inject a cooling medium into the water reservoir. The support block is used to support the workpiece and position it. A first fixing plate is provided at the top of the water reservoir, and a first arc-shaped clamping groove is provided on the first fixing plate and is used to position the interface of the placed workpiece. The water tank is provided with a second water outlet hole for discharging the water in the water tank.

[0021] Further, the pipe fitting clamping mechanism includes a push-pull module, a clamping module, and a positioning module. Both the clamping module and the positioning module are connected to the push-pull module. By driving the clamping module and the positioning module to approach or move away from the interface of the workpiece placed in the water reservoir through the push-pull module, the workpiece is clamped or loosened, which is convenient for disassembling and assembling the workpiece.

[0022] Furthermore, the push-pull module includes a mounting plate 1, a slide rail, a slider, a support seat, a Z-shaped push-pull rod and an L-shaped rod. The slide rail and the support seat are both connected to the mounting plate 1. The L-shaped rod is connected to the slider. The slider slides along the slide rail. The slider is connected to the push-pull block. One end of the Z-shaped push-pull rod is rotatably connected to the support seat, and the other end is provided with a handle. The Z-shaped push-pull rod is rotatably connected to a rotating arm through a rotating shaft, and the other end of the rotating arm is rotatably connected to the push-pull block.

[0023] Furthermore, the clamping module includes a first connecting block and a horizontal plate. The horizontal plate is fixedly connected to the L-shaped rod through the first connecting block. A clamping part is integrally formed at one end of the horizontal plate close to the water tank. A second arc-shaped slot is provided on the clamping part for clamping or loosening the interface of the workpiece placed in the water tank.

[0024] Furthermore, the positioning module includes a second connecting block, an adapter block, a column, a support plate and a positioning sleeve. The adapter block is connected to the first connecting block through the second connecting block, the support plate is connected to the adapter block through the column, and the positioning sleeve is provided on the support plate.

[0025] Furthermore, the pipe clamping mechanism includes a second fixed plate, a balancing plate and at least one clamping unit. The second fixed plate is provided with a locking piece and a positioning pin. The balancing plate is provided with a positioning hole and a through hole. The positioning pin is limited in the positioning hole. The locking piece passes through the through hole. By rotating the locking piece, a fixed connection between the balancing plate and the second fixed plate is achieved. The clamping unit is detachably connected to the balancing plate.

[0026] Furthermore, the clamping unit includes a vertical pole, a clamping block, a rotating part, a hanging rod and a clamping block. The rotating part is connected to the vertical pole through the clamping block. The hanging rod is detachably connected to the rotating part. The clamping block is located at the end of the hanging rod and is used to clamp the pipe fitting of the workpiece. At least one mounting hole is provided on the balance plate, and the vertical pole is connected to the mounting hole.

[0027] Furthermore, the eight-tool displacement assembly includes a conveying base, a first conveying mechanism, a second conveying mechanism and a positioning plate. The first conveying mechanism is installed on the conveying base, and the first conveying mechanism is connected to the second conveying mechanism. The first conveying mechanism and the second conveying mechanism drive the tooling plate to move in a direction to the positioning plate, and the positioning plate is used to position the tooling plate.

[0028] Furthermore, the first conveying mechanism includes a linear guide rail, a guide rail slider, a lifting base plate and an electric cylinder. The linear guide rail is arranged on the conveying base frame, the guide rail slider is installed on the linear guide rail, the lifting base plate is connected to the guide rail slider, and the electric cylinder is connected to the lifting base plate. The guide rail slider is driven to move along the linear guide rail by the extension and contraction of the electric cylinder. A connecting piece is provided on the lifting base plate, and the connecting pieces on the two adjacent lifting base plates are connected by a connecting rod; the second conveying mechanism includes a pushing cylinder and a lifting plate, and the lifting plate is installed at the output end of the pushing cylinder. The lifting plate is lifted by the pushing cylinder, thereby driving the tooling plate to rise and fall.

[0029] Further, it further includes a nitrogen filling and water replenishing component, which corresponds to the eight-station transfer component. The nitrogen filling and water replenishing component is used to replenish water and fill nitrogen into the clamping tooling component and the workpiece to protect the workpiece during welding. The nitrogen filling and water replenishing component includes a nitrogen filling mechanism and a water replenishing mechanism. The nitrogen filling mechanism is used to fill nitrogen into the workpiece, and the water replenishing mechanism is used to fill a cooling medium into the clamping tooling component.

[0030] Further, the nitrogen filling and water replenishing component includes a nitrogen filling mechanism and a water replenishing mechanism. The nitrogen filling mechanism is used to fill nitrogen into the workpiece, and the water replenishing mechanism is used to fill a cooling medium into the clamping tooling component;

[0031] The nitrogen filling mechanism includes a first telescopic cylinder, a first connecting plate, and a nitrogen filling joint. The first connecting plate is installed on the first telescopic cylinder, and the nitrogen filling joint is installed on the first connecting plate. The first telescopic cylinder drives the nitrogen filling joint to move and fill nitrogen into the workpiece;

[0032] The water replenishing mechanism includes a second telescopic cylinder, a connecting pipe, a water replenishing joint, and a water replenishing pipe. The connecting pipe is installed on the second telescopic cylinder, the water replenishing joint is installed on the connecting pipe, and the water replenishing pipe is connected to the water replenishing joint. The second telescopic cylinder drives the water replenishing pipe to move and fill a cooling medium into the clamping tooling component.

[0033] A production method of a double-speed chain production line is characterized by including the following steps:

[0034] S1. Start the production line;

[0035] S2. Place the tooling board. First, place the tooling board on the conveyor line component, and then install the clamping tooling component on the tooling board. The tooling board drives the clamping tooling component to move along the production direction of the production line. When the tooling board moves to the next station, it is blocked by the buffer blocking component;

[0036] S3. Repeat step S2 and continuously place tooling boards on the conveyor line component;

[0037] S4. Install the workpiece. When the tooling board moves on the conveyor line component, different pipe fittings of the workpiece are installed at different stations. After the pipe fittings are installed, the installed pipe fittings are clamped and positioned by the pipe fitting clamping mechanism and the pipe fitting clamping and holding mechanism;

[0038] 1) First rotation and commutation. When the tooling board moves on the production line, the tooling board needs to be rotated and commutated to facilitate the installation of pipe fittings. When the tooling board is located on the first first conveyor line, first rotate the tooling board counterclockwise by 90° through the rotation mechanism. When the tooling board moves to the end of the first first conveyor line, move the tooling board to the first second conveyor line through the commutation mechanism, and continue to install the workpiece on the second conveyor line until the tooling board moves to the second first conveyor line;

[0039] 2) Second rotation and commutation: When the tooling plate moves on the second conveyor line, first, the tooling plate is rotated clockwise by 90° through the rotation mechanism. When the tooling plate moves to the end of the first section of the second conveyor line, the workpiece is installed, and the tooling plate is moved to the second section of the second conveyor line through the commutation mechanism.

[0040] S5. Weld the installed workpiece on the second section of the second conveyor line, and perform directional and distance-fixed movement through the eight-station transfer mechanism to ensure that the welding device corresponds to the welding interface. After the workpiece is welded, it is moved to the first section of the first conveyor line through the second conveyor line, and the welded workpiece is taken off to complete the welding.

[0041] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects:

[0042] 1. The present invention can not only improve the clamping accuracy of the four-way valve and its pipe fittings, but also improve the welding quality and welding speed between the four-way valve and the pipe fittings. At the same time, it avoids affecting the welding quality due to excessive temperature during the welding process of the four-way valve, meets the requirements of assembly line production, and improves the processing efficiency.

[0043] 2. The present invention is equipped with a rotation mechanism and a commutation mechanism on the first conveyor line. The tooling plate is rotated through the rotation mechanism, which is convenient for workers to install the four-way valve pipe fittings and is easy to operate. At the same time, at the end, through the commutation mechanism, the tooling plate is commutated and conveyed to the second conveyor line. The first conveyor line and the second conveyor line enclose to form a production line, reducing the occupied space of the double-speed chain production line.

[0044] 3. The present invention is provided with a plurality of buffer and blocking components on the conveyor line assembly. On the one hand, it can block the tooling plate, realize the limit of the tooling plate, facilitate workers to install the four-way valve and its pipe fittings, and at the same time avoid the collision between two adjacent tooling plates.

[0045] 4. The present invention uses the eight-station transfer mechanism to move the tooling plate with the installed four-way valve and its pipe fittings in a directional and distance-fixed manner, so that the connection between the four-way valve and the pipe fittings corresponds to the welding equipment, ensuring the welding quality. And during the movement, two tooling plates are simultaneously moved to the next welding station, increasing the welding efficiency. And a nitrogen filling and water replenishing component is correspondingly provided, and nitrogen and a cooling medium are filled during the welding process for cooling and protection, improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described below with reference to the accompanying drawings:

[0047] Figure 1 It is a schematic structural diagram of a double-speed chain production line of the present invention;

[0048] Figure 2Schematic structural diagram of the conveyor line assembly in the present invention;

[0049] Figure 3 Schematic structural diagram of the first conveyor line in the present invention;

[0050] Figure 4 For the present invention Figure 3 Partial enlarged view of location A in the present invention;

[0051] Figure 5 Schematic structural diagram of the commutation mechanism in the present invention;

[0052] Figure 6 Schematic structural diagram of the commutation mechanism in the present invention;

[0053] Figure 7 Schematic structural diagram of the rotation mechanism in the present invention;

[0054] Figure 8 Schematic structural diagram of the rotation mechanism in the present invention;

[0055] Figure 9 Schematic structural diagram of the buffer blocking assembly in the present invention;

[0056] Figure 10 Schematic structural diagram of the second mounting seat and the blocking member in the present invention;

[0057] Figure 11 Effect diagram of the clamping tooling assembly in the present invention after clamping the four-way valve and the four-way valve pipe fittings;

[0058] Figure 12 Schematic structural diagram of the clamping tooling assembly in the present invention;

[0059] Figure 13 Schematic structural diagram of the clamping tooling assembly from another perspective in the present invention;

[0060] Figure 14 Schematic structural diagram of the balance plate and the second fixing plate in the present invention;

[0061] Figure 15 Connection schematic diagram between the welding cooling mechanism, the second fixing plate and the pipe clamping mechanism in the present invention;

[0062] Figure 16 Schematic structural diagram of the pipe clamping mechanism in the present invention;

[0063] Figure 17 Schematic structural diagram of the welding cooling mechanism in the present invention;

[0064] Figure 18 Effect diagram of the welding cooling mechanism after removing the bottom plate and the support frame in the present invention;

[0065] Figure 19 Schematic diagram of the structure of the second conveyor line and the eight-station transfer assembly in the present invention;

[0066] Figure 20 In the present invention Figure 19 front view;

[0067] Figure 21 Schematic diagram of the structure of the first conveying mechanism in the present invention;

[0068] Figure 22 Schematic diagram of the structure of the check valve assembly in the present invention;

[0069] Figure 23 Schematic diagram of the structure of the nitrogen filling and water replenishing assembly in the present invention;

[0070] Figure 24 Schematic diagram of the structure of the tooling plate in the present invention.

[0071] In the figure: 10 - tooling plate; 11 - second mounting hole; 12 - guide bearing; 13 - guide groove; 14 - notch; 15 - positioning groove; 16 - buffer block; 17 - first buffer member; 18 - mounting portion; 19 - collision portion; 110 - limit hole; 111 - positioning through hole;

[0072] 20 - first conveyor line; 21 - frame; 211 - water collecting tank; 212 - buffer seat; 213 - second buffer member; 22 - power conveyor mechanism; 221 - drive motor; 222 - drive shaft; 223 - driving gear; 224 - driven gear; 225 - mounting shaft; 23 - reversing mechanism; 231 - roller; 232 - tooth portion; 233 - belt; 24 - rotating mechanism; 241 - rotating motor; 242 - second fixed seat; 243 - limiting plate; 244 - first limiting post; 25 - lifting module; 251 - first mounting seat; 252 - lifting seat; 253 - lifting cylinder; 254 - guiding seat; 255 - guiding rod; 256 - first fixed seat; 30 - second conveyor line;

[0073] 40 - buffer and blocking assembly; 41 - hydraulic cylinder; 42 - second mounting seat; 43 - blocking member; 44 - third fixed seat; 441 - third fixing plate; 442 - fixing hole; 443 - mounting bracket; 444 - second mounting plate; 445 - third mounting hole; 446 - sensing member; 45 - mounting space; 46 - hinge shaft; 47 - roller; 48 - limiting member; 49 - limiting post;

[0074] 50 - Clamping tooling assembly; 51 - Welding cooling mechanism; 511 - Base plate; 512 - Support frame; 513 - Water tank; 514 - Water tank; 515 - Valve; 516 - Water replenishing hole; 517 - Support block; 518 - First water outlet hole; 519 - First fixing plate; 5110 - First arc-shaped clamping groove; 5111 - Second water outlet hole; 5112 - Drainage box; 5113 - Drainage hole; 52 - Pipe clamping mechanism; 521 - Push-pull module; 5211 - First mounting plate; 5212 - Slide rail; 5213 - Slide block; 5214 - Support seat; 5215 - Z-shaped push-pull rod; 5216 - Handle; 5217 - Rotating shaft; 5218 - Rotating arm; 5219 - Push-pull block; 52110 - L-shaped rod; 522 - Clamping module; 5221 - First connecting block; 5222 - Horizontal plate; 5223 - Clamping part; 5224 - Second arc-shaped clamping groove; 523 - Positioning module; 5231 - Second connecting block; 5232 - Adapter block; 5233 - Column; 5234 - Support plate; 5235 - Positioning sleeve; 53 - Pipe clamping mechanism; 531 - Second fixing plate; 532 - Balance plate; 533 - Locking piece; 534 - First mounting hole; 535 - Positioning hole; 536 - Upright rod; 537 - Clamping block; 538 - Rotating piece; 539 - Suspension rod; 5310 - Clamping block; 5311 - Positioning pin;

[0075] 60 - Eight-station transfer assembly; 61 - Conveyor chassis; 62 - First conveyor mechanism; 621 - Linear guide; 622 - Guide rail slider; 623 - Lifting base plate; 624 - Electric cylinder; 625 - Connecting piece; 626 - Connecting rod; 63 - Second conveyor mechanism; 631 - Pushing cylinder; 632 - Lifting plate; 633 - Second positioning support; 634 - Speed control valve; 64 - Positioning plate; 641 - Third positioning support; 65 - Check valve assembly; 651 - Second connecting plate; 652 - Connecting block; 653 - Elastic part; 654 - Check valve part;

[0076] 70 - Nitrogen filling and water replenishing assembly; 71 - Nitrogen filling mechanism; 711 - First telescopic cylinder; 712 - First connecting plate; 713 - Nitrogen filling joint; 72 - Water replenishing mechanism; 721 - Second telescopic cylinder; 722 - Connecting pipe; 723 - Water replenishing joint; 724 - Water replenishing pipe; 73 - Third mounting plate; 80 - Welding equipment. Detailed implementation mode

[0077] As Figures 1 to 24As shown in the figure, a double-speed chain production line of the present invention includes a conveying line assembly, a buffer blocking assembly 40, a clamping tooling assembly 50, an eight-station transfer assembly 60, and a nitrogen filling and water replenishing assembly 70. The conveying line assembly is used to convey the tooling plate 10 so that the tooling plate 10 moves along the conveying line assembly. There are multiple buffer blocking assemblies 40, which are distributed on the conveying line assembly according to the layout of the production line stations. The buffer blocking assembly 40 is used to buffer and block the tooling plate 10. The clamping tooling assembly 50 is installed on the tooling plate 10, and the clamping tooling assembly 50 is used to clamp and position the four-way valve and its pipe fittings. The eight-station transfer assembly 60 is installed on the conveying line assembly, and the eight-station transfer assembly 60 is used to directionally transfer the tooling plate 10 in order to weld the four-way valve and the four-way valve pipe fittings in the clamping tooling assembly 50. The nitrogen filling and water replenishing assembly 70 corresponds to the eight-station transfer assembly 60, and the nitrogen filling and water replenishing assembly 70 is used to replenish water and fill nitrogen into the clamping tooling assembly 50 and the four-way valve in order to protect the four-way valve during welding.

[0078] The present invention also includes a welding device 80. The setting of the welding device 80 corresponds to that of the eight-station transfer assembly 60. The four-way valve and its pipe fittings are welded by the welding device 80. The welding device 80 belongs to the prior art, so it will not be elaborated in the present invention.

[0079] The present invention can not only improve the clamping accuracy of the four-way valve and its pipe fittings, but also improve the welding quality and welding speed between the four-way valve and the pipe fittings. At the same time, it can avoid affecting the welding quality due to excessive temperature during the welding process of the four-way valve, meet the requirements of assembly line production, and improve the processing efficiency.

[0080] As Figure 24 shown, in this embodiment, the shape of the tooling plate 10 is rectangular, with dimensions of 400mm * 400mm * 15mm, and it is made of aluminum, with reliable strength. The tooling plate 10 can be supported on the conveying line assembly. Driven by the conveying line assembly, the tooling plate 10 moves along the conveying direction of the conveying line assembly. And the tooling plate 10 is provided with a second installation hole 11 for cooperating with the installation of the clamping tooling assembly 50, which is convenient for the quick positioning of the clamping tooling assembly 50 on the tooling plate 10, reduces the installation difficulty, and is simple and convenient.

[0081] The tooling plate 10 makes directional movement on the conveying line assembly through the guide bearing 12, which can prevent the tooling plate 10 from running off during the movement along with the conveying line assembly, improves the reliability of conveying, and the conveying line assembly is provided with a guide groove 13 corresponding to the guide bearing 12. During conveying, the guide bearing 12 contacts the groove surface of the guide groove 13. The guide bearing 12 and the guide groove 13 have rolling friction, with small frictional force and slow wear of the guide bearing 12, thus prolonging the service life of the guide bearing 12.

[0082] The bottom corners of the tooling plate 10 are provided with grooves 14 for accommodating guide bearings 12. On the one hand, it can ensure that the tooling plate 10 is in full contact with the chain of the conveyor line assembly, thereby ensuring smooth transportation. On the other hand, it will not increase the working surface height of the tooling plate 10, so there is no need to increase the lifting height of the buffer barrier assembly 40, thereby reducing the use requirements of the buffer barrier assembly 40.

[0083] The tooling plate 10 is provided with a positioning structure, which is a positioning groove 15 formed by the inward depression of the side of the tooling plate 10. A buffer block 16 is provided in the positioning groove 15. The buffer block 16 corresponds to the buffer blocking assembly 40. When the tooling plate 10 reaches the processing position, the buffer blocking assembly 40 is lifted upward and contacts the buffer block 16 to stop the tooling plate 10, facilitating the processing of the four-way valve. The buffer block 16 acts as a buffer force, reducing the collision of the buffer blocking assembly 40 on the tooling plate 10, thereby preventing the four-way valve on the clamping tooling assembly 50 from loosening. The structure is simple, the positioning is accurate, and the blocking is reliable. The buffer block 16 can be made of rubber material and has reliable buffering. The buffer block 16 is fixedly connected to the tooling plate 10 by bolts, which is reliable, easy to disassemble and assemble, and can be used at any time. It can be replaced if damaged, which is flexible and convenient.

[0084] A buffer member 17 is provided on the side of the tooling plate 10. The buffer member 17 includes a mounting portion 18 and a collision portion 19. The collision portion 19 can be made of rubber and is bolted to the mounting portion 18, which is also bolted to the tooling plate 10. The buffer member 17 has a simple structure, is impact-resistant, and has low cost. It can be disassembled into two, making it easy to replace damaged parts separately, and is highly practical. The collision portion 19 protrudes outward from the side of the tooling plate 10. During transportation, if the collision portions 19 of two adjacent tooling plates 10 collide, this prevents the two adjacent tooling plates 10 from direct contact and collision, and also prevents the guide bearings 12 of the two adjacent tooling plates 10 from colliding and being damaged.

[0085] like Figures 1 to 2 As shown, the conveyor line assembly includes a first conveyor line 20 and a second conveyor line 30. In this embodiment, two first conveyor lines 20 and two second conveyor lines 30 are provided. The first conveyor line 20 and the second conveyor line 30 are enclosed to form a production line. The first conveyor line 20 and the second conveyor line 30 both include a power conveying mechanism 22 and a frame 21. The power conveying mechanism 22 is installed on the frame 21. The power conveying mechanism 22 provides power for conveying the tooling plate 10. The first conveyor line 20 also includes a reversing mechanism 23 and a rotating mechanism 24. The reversing mechanism 23 is used to reverse the tooling plate 10 and convey it to the second conveyor line 30. The rotating mechanism 24 is used to rotate the tooling plate 10.

[0086] like Figures 3 to 8In the present invention, a reversing mechanism 23 is installed at the end of the first conveyor line 20 on the frame 21. After the tooling plate 10 is transported to the reversing mechanism 23 through the power transportation component, the advancing direction of the tooling plate 10 is changed by the reversing mechanism 23. A rotating mechanism 24 is installed on the frame 21 to rotate the tooling plate 10, ensuring that the tooling plate 10 rotates synchronously while changing its advancing direction, thereby reducing the occupied space of the double-speed chain production line.

[0087] The power transmission mechanism 22 includes a driving motor 221, a driving shaft 222, a driving gear 223, a driven gear 224, and a chain (not shown in the figure). The driving motor 221 is connected to the driving shaft 222 through a coupling. The driving shaft 222 is rotatably installed on the frame 21. The driving gear 223 is installed on the driving shaft 222. The driven gear 224 is rotatably installed on the mounting shaft 225. The mounting shaft 225 is installed on the frame 21. The chain is installed between the driving gear 223 and the driven gear 224. By driving the driving shaft 222 to rotate through the driving motor 221, the driving shaft 222 drives the driving gear 223 to rotate. The driving gear 223 and the driven gear 224 are connected by a chain, and the driving gear 223 and the driven gear 224 drive the chain to rotate, thereby realizing the movement of the tooling plate 10 on the conveyor line.

[0088] In this embodiment, a reversing mechanism 23 is provided at each end of the first conveyor line 20, and a rotating mechanism 24 is provided in the middle of the two reversing mechanisms 23. The reversing mechanism 23 and the rotating mechanism 24 are both provided with a lifting module 25. The reversing mechanism 23 further includes a transplanting module, and the reversing movement of the tooling plate 10 is controlled through the transplanting module. The rotating mechanism 24 further includes a rotating module, and the rotation of the tooling plate 10 is realized through the rotating module. The lifting module 25 is used to push the transplanting mechanism or the rotating mechanism to lift and lower.

[0089] In the present invention, the tooling plate 10 moves on the conveyor line assembly through the power transmission mechanism 22. After the tooling plate 10 completes the processing work at each workstation, the tooling plate 10 needs to change its direction and continue to move. First, the tooling plate 10 needs to be rotated by the rotating mechanism 24, and then its direction is changed by the reversing mechanism 23. In order to prevent the reversing mechanism 23 and the rotating mechanism 24 from affecting the movement of the tooling plate 10 on the frame 21, the lifting module 25 is provided to control the lifting and lowering of the transplanting module and the rotating module. When rotation and direction change are not required, the lifting module 25 controls the transplanting module and the rotating module to lower without affecting the movement of the tooling plate 10. When rotation or direction change is required, the lifting module 25 pushes the transplanting module and the rotating module to rise to achieve rotation or direction change.

[0090] The lifting module 25 includes a first mounting seat 251, a lifting seat 252, a lifting cylinder 253, a guide seat 254, a guide rod 255 and a first fixing seat 256. The lifting cylinder 253 is installed on the first mounting seat 251, and the output end of the lifting cylinder 253 is connected to the lifting seat 252. The transplanting module or the rotating module is installed on the lifting seat 252. The lifting cylinder 253 is used to push the lifting seat 252 to drive the transplanting module or the rotating module to lift and lower. The guide seat 254 penetrates through the first mounting seat 251 and is fixed on the first mounting seat 251. The first fixing seat 256 is fixed on the bottom surface of the lifting seat 252. One end of the guide rod 255 is connected to the first fixing seat 256, and the other end passes through the guide seat 254 and slides up and down along the guide seat 254. The design of the guide rod 255 increases the stability of the lifting and lowering of the lifting module 25.

[0091] The transplanting module includes a roller 231 and a transplanting motor (not shown in the figure). The transplanting motor is connected to the roller 231, and the transplanting motor drives the roller 231 to rotate. A plurality of rollers 231 are provided. The plurality of rollers 231 are rotatably installed on the lifting seat 252. The roller 231 is provided with a tooth portion 232. The synchronous rotation between two adjacent rollers 231 is achieved by engaging a belt 233 through the tooth portion 232. In this embodiment, the rotation direction of the roller 231 is the direction in which the power transmission mechanism 22 in the conveyor assembly controls the movement of the tooling plate 10, so as to realize the reverse movement of the tooling plate 10.

[0092] The rotating module includes a rotating motor 241, a rotating seat (not shown in the figure), a second fixing seat 242 and a limiting plate 243. The second fixing seat 242 is fixed on the lifting seat 252. The rotating motor 241 is installed on the second fixing seat 242. The rotating seat can be rotatably installed in the second fixing seat 242 through a ball bearing. The rotating motor 241 is connected to the rotating seat. The limiting plate 243 is installed on the rotating seat. The rotating motor 241 is used to control the rotating seat to drive the limiting plate 243 to rotate, so that the limiting plate 243 rotates synchronously with the rotating seat. The limiting plate 243 is provided for placing and limiting the tooling plate 10. Specifically, a first limiting pillar 244 is further provided on the limiting plate 243, and a limiting hole 110 corresponding to the first limiting pillar 244 is provided on the tooling plate 10 for the first limiting pillar 244 to insert. When the lifting module 25 controls the rotating module to rise, the first limiting pillar 244 on the limiting plate 243 is inserted into the limiting hole 110 on the tooling plate 10, so as to realize the limiting of the tooling plate 10 on the limiting plate 243 and prevent the tooling plate 10 from shifting during the rotation process.

[0093] Such as Figures 9 to 10As shown, in the present invention, the buffer blocking assembly 40 can be arranged according to the station distribution. The buffer blocking assembly 40 includes a hydraulic cylinder 41, a second mounting seat 42, a blocking member 43, and a third fixing seat 44. The second mounting seat 42 is connected to the hydraulic cylinder 41, and the hydraulic cylinder 41 is mounted on the third fixing seat 44. The hydraulic cylinder 41 is used to push the second mounting seat 42 to move up and down. The blocking member 43 is rotatably mounted on the second mounting seat 42, and the blocking member 43 is used to block the tooling plate 1014. The blocking member 43 is mounted on the second mounting seat 42. By the hydraulic cylinder 41 pushing the second mounting seat 42 and the blocking member 43 to move up and down, when the tooling plate 10 moves to the station, the hydraulic cylinder 41 controls the second mounting seat 42 and the blocking member 43 to rise, so that the blocking member 43 blocks the tooling plate 10, thereby realizing the limit of the tooling plate 10 and facilitating the processing operation of the workpiece on the tooling plate 10. After the processing is completed, the hydraulic cylinder 41 controls the second mounting seat 42 and the blocking member 43 to descend, so that the tooling 4 can continue to move on the production line to the next station.

[0094] The second mounting seat 42 is provided with a mounting space 45. A hinge shaft 46 is installed through the mounting space 45. One end of the blocking member 43 is rotatably mounted on the hinge shaft 46 and is located in the mounting space 45. The blocking member 43 rotates along the hinge shaft 46. A spring (not shown in the figure) is sleeved on the hinge shaft 46. A roller 47 is rotatably mounted at the other end of the blocking member 43. The roller 47 abuts against the tooling plate 10. A limiting member 48 is mounted on one side of the second mounting seat 42. A limiting post 49 is provided on the side of the blocking member 43 corresponding to the limiting member 48. Through this structural design, the rotation of the blocking member 43 on the second mounting seat 42 is realized. When the blocking member 43 rotates, the elastic force of the spring on the hinge shaft 46 makes the blocking member 43 return to the initial state. Through the cooperation of the limiting post 49 and the limiting member 48, the limiting post 49 abuts against the limiting member 48 during the recovery process of the blocking member 43, avoiding the blocking member 43 rotating too large an angle when recovering.

[0095] In the present invention, when it is necessary to block the tooling plate 10, the hydraulic cylinder 41 is used to push the second mounting seat 42 and the blocking member 43 upward. The blocking member 43 is stuck in the positioning groove 15 of the tooling plate 10, thereby realizing the blocking of the tooling plate 10. When the workpiece on the tooling plate 10 is processed, the tooling plate 10 needs to continue to move on the production line to the next station. At this time, the hydraulic cylinder 41 retracts, driving the second mounting seat 42 and the blocking member 43 to descend. During the descending process, the friction between the blocking member 43 and the bottom surface of the tooling plate 10 is reduced by the roller 47, extending the service life of the blocking member 43 and the tooling plate 10. The blocking member 43 and the second mounting seat 42 are designed to be rotatable. During the descending process of the blocking member 43, the tooling plate 10 presses the blocking member 43 to make the blocking member 43 rotate, reducing the retraction time of the hydraulic cylinder 41 and increasing the work efficiency. When the tooling plate 10 is separated from the blocking member 43, the blocking member 43 rotates back under the action of the spring. The cooperation between the limit post 49 and the limiting member 48 prevents the blocking member 43 from rotating excessively. At the same time, when the blocking member 43 blocks the tooling plate 10, the tooling plate 10 applies a force to the blocking member 43. The cooperation between the limit post 49 and the limiting member 48 can also prevent the blocking member 43 from rotating when blocking the tooling plate 10, increasing the stability of the blocking member 43 during blocking.

[0096] Further, both ends of the third fixing seat 44 are bent to form the third fixing plate 441. The third fixing plate 441 is integrally formed with the third fixing seat 44. A fixing hole 442 is provided on the third fixing plate 441. The third fixing seat 44 is fixedly installed through the fixing hole 442 in combination with bolts. An installation bracket 443 is installed on the third fixing seat 44. The installation bracket 443 is provided with a second installation plate 444. The second installation plate 444 and the third fixing seat 44 are correspondingly provided with third installation holes 445. The installation bracket 443 is installed on the third fixing seat 44 through the third installation holes 445 in combination with bolts. An induction member 446 is installed on the installation bracket 443. The position of the tooling plate 10 is sensed through the induction member 446. The induction member 446 can adopt an induction switch.

[0097] In the present invention, a water collecting trough 211 is further installed on the frame body 21. The water drops dripping from the tooling plate 10 are collected through the water collecting trough 211 to prevent the water drops from falling to the ground. A buffer seat 212 is installed at the end of the frame body 21. A second buffer member 213 is installed on the buffer seat 212. The second buffer member 213 corresponds to the first buffer member 17 on the tooling plate 10. When the tooling plate 10 moves to the end of the frame body 21, the first buffer member 17 on the tooling plate 10 is buffered through the second buffer member 213, thereby buffering the tooling plate 10 and preventing the tooling plate 10 from detaching from the frame body 21.

[0098] As Figures 11 to 18As shown in the figure, the clamping tooling assembly 50 includes a welding cooling mechanism 51, a pipe fitting clamping mechanism 52, and a pipe fitting clamping mechanism 53. The welding cooling mechanism 51 is used to place the four-way valve and inject a cooling medium. The cooling medium can be cooling water or coolant. When welding the four-way valve and the four-way valve pipe fitting, it cools and protects the four-way valve. The pipe fitting clamping mechanism 52 is used to clamp and position the interface between the four-way valve and the four-way valve pipe fitting, and position the pipe fitting of the four-way valve. The pipe fitting clamping mechanism 53 is connected to the welding cooling mechanism 51 and is used to clamp the pipe fitting of the four-way valve.

[0099] The welding cooling mechanism 51 includes a water tank 513, a water reservoir 514, a valve 515, a bottom plate 511, and a support frame 512. The water reservoir 514 is located inside the water tank 513. A first water outlet hole 518 is provided at the bottom of the water reservoir 514. A drainage box 5112 is connected below the water tank 513. The drainage box 5112 is provided with a drainage hole 5113, and the drainage hole 5113 communicates with the first water outlet hole 518. The valve 515 is provided on the drainage box 5112 to control the on-off between the first water outlet hole 518 and the drainage hole 5113. First, place the four-way valve in the water reservoir 514 for fixation, and then introduce the cooling medium. During the welding process, the four-way valve can be cooled to ensure the welding quality and reduce the rejection rate. After welding, by opening the valve 515, the first water outlet hole 518 and the drainage hole 5113 can be connected, and the water in the water reservoir 514 is output through the drainage hole 5113, reducing the weight during the handling of the clamping tooling and the four-way valve. The cooling medium in the water reservoir 514 will shake during movement, and the water tank 513 can collect the overflowing cooling medium, reducing the splashing of the cooling medium onto the workshop floor.

[0100] The water reservoir 514 is provided with a water replenishing hole 516 and a support block 517. The water replenishing hole 516 is used to inject the cooling medium into the water reservoir 514. The support block 517 is used to support the four-way valve and position the four-way valve. After the four-way valve and its four-way valve pipe fitting are assembled, inject the cooling medium into the water reservoir 514 through the water replenishing hole 516. A first fixing plate 519 is provided at the top of the water reservoir 514. A first arc-shaped clamping groove 5110 is provided on the first fixing plate 519 for positioning the interface of the placed four-way valve, improving the clamping accuracy of the four-way valve and further improving the welding quality. The water tank 513 is provided with a second water outlet hole 5111 for discharging the water in the water tank 513, reducing the weight during transfer and handling, and reducing the splashing of the cooling medium onto the workshop floor.

[0101] The bottom plate 511 is connected to the water tank 513 through the support frame 512 and is used to support the water tank 513 and the water tank 514. Through the bottom plate 511 and the support frame 512, the heights of the water tank 513 and the water tank 514 can be adjusted as a whole to meet the height requirements when workers assemble the four-way valve and its four-way valve pipe fittings. At the same time, it is convenient to connect the water tank 513 and the water tank 514 to the tooling plate 10, which is beneficial to water replenishment and drainage.

[0102] In the present invention, the four-way valve is first placed in the water tank 514 for fixation, and then the cooling medium is introduced. During the welding process, the four-way valve can be cooled to ensure the welding quality and reduce the rejection rate. After the welding is completed, by opening the valve 515, the first water outlet hole 518 and the drain hole 5113 can be connected, and the water in the water tank 514 is output through the drain hole 5113 to reduce the weight during the clamping tooling and the handling of the four-way valve. The cooling medium in the water tank 514 will shake during the movement, and the overflowing cooling medium can be collected through the water tank 513 to reduce the splashing of the cooling medium onto the workshop floor.

[0103] The pipe fitting clamping mechanism 52 includes a push-pull module 521, a clamping module 522, and a positioning module 523. Both the clamping module 522 and the positioning module 523 are connected to the push-pull module 521. The push-pull module 521 drives the clamping module 522 and the positioning module 523 to approach or move away from the interface of the four-way valve placed in the water tank 514, so as to clamp or loosen the four-way valve, which is convenient for disassembling and assembling the four-way valve. By manually controlling the operation of the push-pull module 521, the clamping module 522 and the positioning module 523 can be driven to approach or move away from the water tank 514 to meet the clamping requirements for the four-way valve and its pipe fittings.

[0104] The push-pull module 521 drives the clamping module 522 and the positioning module 523 to approach or move away from the interface of the four-way valve placed in the water tank 514, so as to clamp or loosen the four-way valve, which is convenient for disassembling and assembling the four-way valve. By manually controlling the operation of the push-pull module 521, the clamping module 522 and the positioning module 523 can be driven to approach or move away from the water tank 514 to meet the clamping requirements for the four-way valve and its pipe fittings.

[0105] The push - pull module 521 includes a first mounting plate 5211, a slide rail 5212, a slider 5213, a support seat 5214, a Z - shaped push - pull rod 5215, and an L - shaped rod 52110. Both the slide rail 5212 and the support seat 5214 are connected to the first mounting plate 5211. The L - shaped rod 52110 is connected to the slider 5213. The slider 5213 slides along the slide rail 5212. The slider 5213 is connected with a push - pull block 5219. One end of the Z - shaped push - pull rod 5215 is rotatably connected to the support seat 5214, and the other end is provided with a handle 5216. The Z - shaped push - pull rod 5215 is rotatably connected with a rotating arm 5218 through a rotating shaft 5217. The other end of the rotating arm 5218 is rotatably connected to the push - pull block 5219. By pushing the handle 5216, the Z - shaped push - pull rod 5215 can be rotated along the support seat 5214, and then the rotating arm 5218 can be driven to move through the rotating shaft 5217, so that the push - pull block 5219 drives the slider 5213 and the L - shaped rod 52110 to move horizontally along the slide rail 5212, meeting the position adjustment requirements of the clamping module 522 and the positioning module 523.

[0106] The clamping module 522 includes a first connecting block 5221 and a horizontal plate 5222. The horizontal plate 5222 is fixedly connected to the L - shaped rod 52110 through the first connecting block 5221. One end of the horizontal plate 5222 close to the water tank 514 is integrally formed with a clamping part 5223. The clamping part 5223 is provided with a second arc - shaped clamping groove 5224 for clamping or loosening the interface of the four - way valve placed in the water tank 514. The first connecting block 5221 improves the connection stability between the horizontal plate 5222 and the L - shaped rod 52110. The interface of the four - way valve can be clamped and positioned through the second arc - shaped clamping groove 5224 on the clamping part 5223.

[0107] The positioning module 523 includes a second connecting block 5231, an adapter block 5232, a column 5233, a support plate 5234, and a positioning sleeve 5235. The adapter block 5232 is connected to the first connecting block 5221 through the second connecting block 5231. The support plate 5234 is connected to the adapter block 5232 through the column 5233. The positioning sleeve 5235 is arranged on the support plate 5234. Through the design of the adapter block 5232, the column 5233, and the support plate 5234, the positioning sleeve 5235 can be driven to move to the required position and then fixed, meeting the assembly requirements between the four - way valve pipe fittings and the four - way valve, improving the welding quality. The second connecting block 5231 improves the installation stability of the adapter block 5232.

[0108] The pipe fitting clamping mechanism 53 includes a second fixing plate 531, a balance plate 532 and at least one clamping unit. A locking member 533 and a positioning pin 5311 are provided on the second fixing plate 531. A positioning hole 535 and a through hole are provided on the balance plate 532. The positioning pin 5311 is limited in the positioning hole 535. The locking member 533 passes through the through hole. By rotating the locking member 533, the fixed connection between the balance plate 532 and the second fixing plate 531 is realized. The clamping unit is detachably connected to the balance plate 532. Through the design of the locking member 533 and the positioning pin 5311, it is not only convenient for the installation and disassembly between the balance plate 532 and the second fixing plate 531, but also improves the connection strength between the balance plate 532 and the second fixing plate 531, preventing the clamping unit from shaking during the movement following the tooling plate 10, which affects the assembly accuracy between the four-way valve pipe fitting and the four-way valve, and further affects the welding quality. The clamping unit is used to clamp and fix the four-way valve pipe fitting.

[0109] The clamping unit includes a vertical rod 536, a clamping block 537, a rotating member 538, a suspension rod 539 and a clamping block 5310. The rotating member 538 is connected to the vertical rod 536 through the clamping block 537. The suspension rod 539 is detachably connected to the rotating member 538. The clamping block 5310 is located at the end of the suspension rod 539 and is used to clamp the four-way valve pipe fitting. By moving the rotating block up and down along the vertical rod 536, the height position of the clamping block 5310 can be adjusted. After reaching the required position, the fixing between the clamping block 537 and the vertical rod 536 can be realized by tightening the fastening screw. The rotating member 538 can drive the suspension rod 539 to rotate, thereby adjusting the angular position of the clamping block 5310. After rotating to the required angle, the fixing of the rotating member 538 can be realized by tightening the fastening screw.

[0110] Through the design of the locking member 533 and the positioning pin 5311, it is not only convenient for the installation and disassembly between the balance plate 532 and the second fixing plate 531, but also improves the connection strength between the balance plate 532 and the second fixing plate 531, preventing the clamping unit from shaking during the movement following the tooling plate 10, which affects the assembly accuracy between the four-way valve pipe fitting and the four-way valve, and further affects the welding quality. The clamping unit is used to clamp and fix the four-way valve pipe fitting.

[0111] At least one first mounting hole 534 is provided on the balance plate 532. The vertical rod 536 is connected to the first mounting hole 534, which is convenient for the installation and disassembly between the vertical rod 536 and the balance plate 532. At the same time, the number of vertical rods 536 can be increased or decreased according to the number and shape of the four-way valve pipe fittings.

[0112] Through the design of the above structure, not only the clamping accuracy of the four-way valve and its four-way valve pipe fittings can be improved, but also the welding quality between the four-way valve and the four-way valve pipe fittings can be improved, avoiding the influence of welding quality due to excessively high layout temperature during the welding process of the four-way valve, meeting the requirements of assembly line production and improving processing efficiency.

[0113] When the clamping tooling assembly 50 is in use, the welding cooling mechanism 51 is first fixed to the tooling plate 10, and then the pipe clamping mechanism 52 is installed on the tooling plate 10, and the pipe clamping mechanism 53 is installed on one side of the welding cooling mechanism 51. Then, the assembled tooling plate 10 is placed on the conveyor line assembly and transported to each workstation through the power conveying mechanism 22 to realize the installation of the four-way valve and the four-way valve pipe fittings, and clamping and positioning are performed.

[0114] like Figures 19 to 22 As shown, the eight-workstation transplanting assembly 60 is installed on the second conveyor line 30. The eight-workstation transplanting assembly 60 includes a conveying base frame 61, a first conveying mechanism 62, a second conveying mechanism 63 and a positioning plate 64. The first conveying mechanism 62 is installed on the conveying base frame 61. The first conveying mechanism 62 is connected to the second conveying mechanism 63. The first conveying mechanism 62 and the second conveying mechanism 63 drive the tooling plate 10 to move in a directional manner to the positioning plate 64. The tooling plate 10 is moved to the positioning plate 64 through the coordinated action of the first conveying mechanism 62 and the second conveying mechanism 63. The tooling plate 10 is positioned by the positioning plate 64 and moved an equal distance on the positioning plate 64, thereby realizing accurate and efficient transplanting of the transplanted object and reducing the operation difficulty and cost.

[0115] The first conveying mechanism 62 includes an electric cylinder 624 and a linear guide 621 provided on the conveying chassis 61. The electric cylinder 624 is provided below the linear guide 621. A guide rail slider 622 is installed on the linear guide 621. A lifting base plate 623 is connected above the guide rail slider 622. The number of lifting base plates 623 is set according to actual conditions. Two guide rail sliders 622 are provided on each lifting base plate 623 to improve the movement stability of the lifting base plate 623. A connecting piece 625 is provided on the lifting base plate 623. The connecting parts 625 are arranged on both sides of the lifting base plate 623, and the adjacent two connecting parts 625 of the two adjacent lifting base plates 623 are connected by a connecting rod 626 to realize the synchronous movement of multiple lifting base plates 623. The second conveying mechanism 63 is installed on the lifting base plate 623. The second conveying mechanism 63 includes a pushing cylinder 631 connected to the lifting base plate 623, and the protruding end of the pushing cylinder 631 is connected to the lifting plate 632. The lifting plate 632 is lifted by the pushing cylinder 631, thereby driving the tooling plate 10 to rise and fall.

[0116] In the present invention, a speed control valve 634 is connected to the pushing cylinder 631. The speed control valve 634 adopts common components on the market. By setting the speed control valve 634 to adjust the gas flow rate of the pushing cylinder 631, the telescopic speed of the pushing cylinder 631 is adjusted. On the lifting plate 632, a positioning pillar two 633 with the same function as the positioning pillar one is provided, and the tooling plate 10 is limited by the positioning pillar two 633.

[0117] When the eight-station transfer assembly 60 is in use, first, the tooling plate 10 is lifted by the second conveying mechanism 63, and then the second conveying mechanism 63 is driven by the first conveying mechanism 62 to move along the direction of the linear guide rail 621. When moving to the welding station, the second conveying mechanism 63 retracts, and the tooling plate 10 is placed on the positioning plate 64. A positioning pillar three 641 is provided on the positioning plate 64, and a positioning through hole 111 corresponding to the positioning pillar three 641 is provided on the tooling plate 10. The tooling plate 10 is limited on the positioning plate 64 through the cooperation of the positioning pillar three 641 and the positioning through hole 111, preventing the positioning plate 64 from moving during the welding process. Moreover, the eight-station transfer assembly 60 moves two tooling plates 10 each time, increasing the working efficiency.

[0118] Specifically, a check component 65 is also installed on the frame. The check component 65 is arranged at one end of the frame. The check component 65 includes a connecting plate two 651 connected to the frame, a connecting block 652 arranged on the connecting plate two 651, an elastic member 653 arranged in the connecting block 652, and a check member 654 connected to the connecting block 652. The check member 654 is hinged to the connecting block 652. A limiting slot for the movement of the check member 654 is provided on the connecting block 652. The elastic member 653 is connected to the check member 654. The position of the check member 654 is adjusted by the deformation of the elastic member 653 driving the check member 654 to move along the limiting slot. When the tooling plate 10 moves forward, the tooling plate 10 contacts the check member 654, the tooling plate 10 presses the check member 654, the check member 654 moves downward along the limiting slot, the elastic member 653 contracts, and the tooling plate 10 passes through the check member 654. The elastic member 653 restores and drives the check member 654 to move upward. The tooling plate 10 cannot press the check member 654 in the reverse direction, realizing the locking of the one-way movement. The setting of the check component 65 makes the tooling plate 10 not produce a retracting displacement when moving.

[0119] As Figure 23 shown, the nitrogen filling and water replenishing component 70 includes a nitrogen filling mechanism 71 and a water replenishing mechanism 72. The nitrogen filling mechanism 71 is used to fill nitrogen into the workpiece, and the water replenishing mechanism 72 is used to fill a cooling medium into the clamping tooling assembly 50. The cooling medium can be cooling water or coolant. Both the nitrogen filling mechanism 71 and the water replenishing mechanism 72 are installed on the mounting plate three 73.

[0120] The nitrogen filling mechanism 71 includes a telescopic cylinder 711, a first connecting plate 712, and a nitrogen filling joint 713. The first connecting plate 712 is installed on the telescopic cylinder 711, and the nitrogen filling joint 713 is installed on the first connecting plate 712. The nitrogen filling joint 713 is connected to an external nitrogen filling pipeline. The telescopic cylinder 711 drives the nitrogen filling joint 713 to move towards the clamping fixture assembly 50 and is connected to the four-way valve pipe fitting through a pipeline, so as to fill nitrogen into the four-way valve and protect the four-way valve during welding to ensure the welding quality.

[0121] The water replenishing mechanism 72 includes a telescopic cylinder 721, a connecting pipe 722, a water replenishing joint 723, and a water replenishing pipe 724. The connecting pipe 722 is installed on the telescopic cylinder 721, the water replenishing joint 723 is installed on the connecting pipe 722, and the water replenishing pipe 724 is connected to the water replenishing joint 723. The telescopic cylinder 721 drives the water replenishing pipe 724 to move and fill a cooling medium into the clamping fixture assembly 50, thereby protecting the four-way valve.

[0122] A production method of a double-speed chain production line is characterized by including the following steps:

[0123] S1. Start the production line;

[0124] S2. Place the tooling board 10. First, place the tooling board 10 on the conveyor line assembly, and then install the clamping fixture assembly 50 on the tooling board 10. The tooling board 10 drives the clamping fixture assembly 50 to move along the production direction of the production line. When the tooling board 10 moves to the next station, it is blocked by the buffer blocking assembly 40.

[0125] S3. Repeat step S2 and continuously place the tooling board 10 on the conveyor line assembly;

[0126] S4. Install the workpiece. When the tooling board 10 moves on the conveyor line assembly, different pipe fittings of the workpiece are installed at different stations. After the pipe fitting installation is completed, the installed pipe fittings are clamped and positioned by the pipe fitting clamping mechanism 52 and the pipe fitting clamping mechanism 53.

[0127] 1) First rotation and commutation. When the tooling board 10 moves on the production line, the tooling board 10 needs to be rotated and commuted to facilitate the installation of the pipe fittings. When the tooling board 10 is located on the first first conveyor line 20, first rotate the tooling board 10 counterclockwise by 90° through the rotation mechanism 24. When the tooling board 10 moves to the end of the first first conveyor line 20, move the tooling board 10 to the first second conveyor line 30 through the commutation mechanism 23, and continue to install the workpiece on the second conveyor line 30 until the tooling board 10 moves to the second first conveyor line 20.

[0128] 2) Second rotation and commutation: When the tooling plate 10 moves on the second conveyor line, first, the tooling plate 10 is rotated clockwise by 90° through the rotation mechanism 24. When the tooling plate 10 moves to the end of the first section of the second conveyor line 20, the installation of the workpiece is completed, and the tooling plate 10 is moved to the second section of the second conveyor line 30 through the commutation mechanism 23.

[0129] S5. Weld the installed workpiece on the second section of the second conveyor line 30, and move it in a fixed orientation and distance through the eight-station transfer mechanism to ensure that the welding device corresponds to the welding interface. After the workpiece is welded, it is moved to the first section of the first conveyor line 20 through the second conveyor line, and the welded workpiece is removed to complete the welding.

[0130] Through the above method steps, the present invention realizes the assembly line installation of the four-way valve and its pipe fittings, and can directly weld the four-way valve and the four-way valve pipe fittings after the installation. It can not only improve the clamping accuracy and installation efficiency of the installation of the four-way valve and the four-way valve pipe fittings, but also improve the welding quality and welding speed between the four-way valve and the pipe fittings, realize the assembly line operation, and improve the processing efficiency.

[0131] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all covered by the protection scope of the present invention.

Claims

1. A double-speed chain production line, characterized in that: including a conveyor line assembly for conveying a tooling plate; a clamping tooling assembly mounted on the tooling plate for clamping and positioning a workpiece; an eight-station transfer assembly mounted on the conveyor line assembly for directionally transferring the tooling plate to weld the workpiece in the clamping tooling assembly.

2. The double-speed chain production line according to claim 1, wherein: The conveyor line assembly includes a first conveyor line and a second conveyor line. The first conveyor line and the second conveyor line enclose to form a production line. Both the first conveyor line and the second conveyor line include a power transmission mechanism and a frame. The power transmission mechanism is mounted on the frame and provides power for conveying the tooling plate. The eight-station transfer assembly is mounted on the second conveyor line. The first conveyor line further includes a reversing mechanism and a rotating mechanism. The reversing mechanism is used for reversely conveying the tooling plate to the second conveyor line, and the rotating mechanism is used for rotating the tooling plate.

3. The double-speed chain production line according to claim 2, characterized in that: The power transmission mechanism includes a driving motor, a driving shaft, a driving gear, a driven gear and a chain. The driving motor is connected to the driving shaft through a coupling. The driving shaft is rotatably mounted on the frame. The driving gear is mounted on the driving shaft. The driven gear is rotatably mounted on a mounting shaft. The mounting shaft is mounted on the frame. The chain is mounted on the driving gear and the driven gear.

4. A double-speed chain production line according to claim 2, characterized in that: Both the reversing mechanism and the rotating mechanism include a lifting module. The reversing mechanism includes a transfer module for controlling the reverse movement of the tooling plate. The rotating mechanism includes a rotating module for rotating the tooling plate. The lifting module is used for pushing the transfer module or the rotating module to lift and lower.

5. A double-speed chain production line according to claim 4, characterized in that: The lifting module includes a mounting seat one, a lifting seat, a lifting cylinder, a guiding seat and a guiding rod. The lifting cylinder is mounted on the mounting seat one and connected to the lifting seat. The lifting cylinder pushes the lifting seat to lift and lower. The transfer mechanism or the rotating mechanism is mounted on the lifting seat. The guiding seat is fixed on the mounting seat one and penetrates through the mounting seat one. The guiding rod is mounted on the lifting seat through a fixing seat one. The guiding rod passes through the guiding seat and slides along the guiding seat.

6. A double-speed chain production line according to claim 5, characterized in that: The transfer module includes rollers and a transfer motor. The transfer motor is connected to the rollers and drives the rollers to rotate. There are multiple rollers, and the multiple rollers are mounted on the lifting seat. The rollers are provided with teeth, and the adjacent rollers are synchronously rotated through a toothed belt combined with the teeth.

7. A double-speed chain production line according to claim 5, characterized in that: The rotation module includes a rotary motor, a rotating seat, a second fixed seat, and a limiting plate. The second fixed seat is fixed on the lifting seat. The rotary motor is installed on the second fixed seat. The rotating seat is installed in the second fixed seat. The rotary motor is connected to the rotating seat. The rotary motor controls the rotation of the rotating seat. The limiting plate is installed on the rotating seat and rotates synchronously with the rotating seat. The limiting plate is provided with a first limiting pillar. The limiting plate is used to place the tooling plate and limit the tooling plate through the first limiting pillar.

8. A double-speed chain production line according to claim 1, characterized in that: It further includes a buffer blocking assembly. The buffer blocking assembly is installed on the conveyor line assembly and is used to buffer and block the tooling plate. The buffer blocking assembly includes a hydraulic cylinder, a second mounting seat, a blocking member, and a third fixed seat. The second mounting seat is connected to the hydraulic cylinder. The hydraulic cylinder is installed on the third fixed seat. The hydraulic cylinder is used to push the second mounting seat to move up and down. The blocking member is rotatably installed on the second mounting seat and is used to block the working plate.

9. The one-speed chain production line according to claim 8, wherein: The second mounting seat is provided with a mounting space. A hinge shaft is installed through the mounting space. One end of the blocking member is rotatably installed on the hinge shaft. A spring is sleeved on the hinge shaft. A roller is rotatably installed at the other end of the blocking member. The second mounting seat is provided with a limiting member. The blocking member is provided with a limiting column. The limiting column abuts against the limiting member.

10. A double-speed chain production line according to claim 1, characterized in that: The clamping tooling assembly includes a welding cooling mechanism, a pipe fitting clamping mechanism, and a pipe fitting holding mechanism. The welding cooling mechanism is used to place the workpiece and inject a cooling medium to provide cooling protection for the workpiece during welding. The pipe fitting clamping mechanism is used to clamp and position the interface of the workpiece and position the pipe fitting of the workpiece. The pipe fitting holding mechanism is connected to the welding cooling mechanism and is used to hold the pipe fitting of the workpiece.

11. A double-speed chain production line according to claim 10, characterized in that: The welding cooling mechanism includes a water tank, a water tank, a valve, a bottom plate, and a support frame. The water tank is located inside the water tank. The bottom of the water tank is provided with a first water outlet hole. A drainage box is connected below the water tank. The drainage box is provided with a drainage hole. The drainage hole is communicated with the first water outlet hole. The valve is arranged in the drainage box and is used to control the on-off between the first water outlet hole and the drainage hole. The bottom plate is connected to the water tank through the support frame and is used to support the water tank and the water tank.

12. A double-speed chain production line according to claim 11, characterized in that: The water tank is provided with a water replenishing hole and a support block. The water replenishing hole is used to inject a cooling medium into the water tank. The support block is used to support the workpiece and position it. The top of the water tank is provided with a first fixing plate. The first fixing plate is provided with a first arc-shaped clamping groove for positioning the interface of the placed workpiece. The water tank is provided with a second water outlet hole for discharging the water in the water tank.

13. A double-speed chain production line according to claim 10, characterized in that: The pipe clamping mechanism includes a push-pull module, a clamping module and a positioning module. The clamping module and the positioning module are both connected to the push-pull module. The push-pull module drives the clamping module and the positioning module to approach or move away from the workpiece interface placed in the water tank, thereby clamping or loosening the workpiece, making it easier to disassemble and assemble the workpiece.

14. A double-speed chain production line according to claim 13, characterized in that: The push-pull module includes a mounting plate 1, a slide rail, a slider, a support seat, a Z-shaped push-pull rod and an L-shaped rod. The slide rail and the support seat are both connected to the mounting plate 1. The L-shaped rod is connected to the slider. The slider slides along the slide rail. The slider is connected to a push-pull block. One end of the Z-shaped push-pull rod is rotatably connected to the support seat, and the other end is provided with a handle. The Z-shaped push-pull rod is rotatably connected to a rotating arm via a rotating shaft, and the other end of the rotating arm is rotatably connected to the push-pull block.

15. A double-speed chain production line according to claim 14, characterized in that: The clamping module includes a first connecting block and a horizontal plate, the horizontal plate is fixedly connected to the L-shaped rod through the first connecting block, and a clamping portion is integrally formed at one end of the horizontal plate close to the water tank. The clamping portion is provided with a second arc-shaped slot for clamping or loosening the interface of the workpiece placed in the water tank.

16. A double-speed chain production line according to claim 15, characterized in that: The positioning module includes a second connecting block, an adapter block, a column, a support plate and a positioning sleeve. The adapter block is connected to the first connecting block through the second connecting block, the support plate is connected to the adapter block through the column, and the positioning sleeve is arranged on the support plate.

17. A double-speed chain production line according to claim 10, characterized in that: The pipe clamping mechanism includes a second fixed plate, a balancing plate and at least one clamping unit. The second fixed plate is provided with a locking piece and a positioning pin. The balancing plate is provided with a positioning hole and a through hole. The positioning pin is limited to the positioning hole. The locking piece passes through the through hole. By rotating the locking piece, a fixed connection between the balancing plate and the second fixed plate is achieved. The clamping unit is detachably connected to the balancing plate.

18. A double-speed chain production line according to claim 17, characterized in that: The clamping unit includes a vertical rod, a clamping block, a rotating part, a hanging rod and a clamping block. The rotating part is connected to the vertical rod through the clamping block. The hanging rod is detachably connected to the rotating part. The clamping block is located at the end of the hanging rod and is used to clamp the pipe of the workpiece. At least one mounting hole is provided on the balance plate, and the vertical rod is connected to the mounting hole.

19. A double-speed chain production line according to claim 1, characterized in that: The eight-tooling displacement assembly includes a conveying base, a first conveying mechanism, a second conveying mechanism and a positioning plate. The first conveying mechanism is installed on the conveying base, and the first conveying mechanism is connected to the second conveying mechanism. The first conveying mechanism and the second conveying mechanism drive the tooling plate to move in a direction to the positioning plate, and the positioning plate is used to position the tooling plate.

20. A double-speed chain production line according to claim 19, characterized in that: The first conveying mechanism includes a linear guide rail, a guide rail slider, a lifting bottom plate, and an electric cylinder. The linear guide rail is arranged on the conveying bottom frame. The guide rail slider is installed on the linear guide rail. The lifting bottom plate is connected to the guide rail slider, and the electric cylinder is connected to the lifting bottom plate. The electric cylinder drives the guide rail slider to move along the linear guide rail through its telescopic motion. A connecting piece is provided on the lifting bottom plate, and the connecting pieces on two adjacent lifting bottom plates are connected by a connecting rod. The second conveying mechanism includes a pushing cylinder and a lifting plate. The lifting plate is installed at the output end of the pushing cylinder, and the pushing cylinder lifts the lifting plate to drive the tooling plate to move up and down.

21. A double-speed chain production line according to claim 1, characterized in that: It further includes a nitrogen filling and water replenishing component, which corresponds to the eight-station transfer component. The nitrogen filling and water replenishing component is used to replenish water and fill nitrogen into the clamping tooling component and the workpiece to protect the workpiece during welding. The nitrogen filling and water replenishing component includes a nitrogen filling mechanism and a water replenishing mechanism. The nitrogen filling mechanism is used to fill nitrogen into the workpiece, and the water replenishing mechanism is used to fill a cooling medium into the clamping tooling component.

22. A double-speed chain production line according to claim 21, characterized in that: The nitrogen filling mechanism includes a first telescopic cylinder, a first connecting plate, and a nitrogen filling joint. The first connecting plate is installed on the first telescopic cylinder, and the nitrogen filling joint is installed on the first connecting plate. The first telescopic cylinder drives the nitrogen filling joint to move and fill nitrogen into the workpiece. The water replenishing mechanism includes a second telescopic cylinder, a connecting pipe, a water replenishing joint, and a water replenishing pipe. The connecting pipe is installed on the second telescopic cylinder, the water replenishing joint is installed on the connecting pipe, and the water replenishing pipe is connected to the water replenishing joint. The second telescopic cylinder drives the water replenishing pipe to move and fill a cooling medium into the clamping tooling component.

23. A production method of a double-speed chain production line according to any one of claims 1-22, characterized in that It includes the following steps: S1. Start the production line. S2. Place the tooling plate. First, place the tooling plate on the conveying line component, and then install the clamping tooling component on the tooling plate. The tooling plate drives the clamping tooling component to move along the production direction of the production line. When the tooling plate moves to the next station, it is blocked by the buffer blocking component. S3. Repeat step S2 and continuously place tooling plates on the conveying line component. S4. Install the workpiece. When the tooling plate moves on the conveying line component, different pipe fittings of the workpiece are installed at different stations. After the pipe fittings are installed, the installed pipe fittings are clamped and positioned by the pipe fitting clamping mechanism and the pipe fitting clamping and holding mechanism. 1) First rotation and commutation. When the tooling plate moves on the production line, it is necessary to rotate and commutate the tooling plate to facilitate the installation of the pipe fittings. When the tooling plate is located on the first first conveying line, first rotate the tooling plate counterclockwise by 90° through the rotation mechanism. When the tooling plate moves to the end of the first first conveying line, move the tooling plate to the first second conveying line through the commutation mechanism, and continue to install the workpiece on the second conveying line until the tooling plate moves to the second first conveying line. 2) Second rotation and commutation. When the tooling plate moves on the second conveyor line, first, the tooling plate is rotated clockwise by 90° through the rotation mechanism. When the tooling plate moves to the end of the first section of the second conveyor line, the workpiece is installed, and the tooling plate is moved to the second section of the second conveyor line through the commutation mechanism. S5. Weld the installed workpiece on the second section of the second conveyor line, and perform directional and distance-fixed movement through the eight-station transfer mechanism to ensure that the welding device corresponds to the welding interface. After the workpiece is welded, it is moved to the first section of the first conveyor line through the second conveyor line, and the welded workpiece is removed to complete the welding.

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