Automatic plate heat exchanger plate production line and method

Abstract

The invention relates to an automatic plate heat exchanger plate production line and method, and belongs to the technical field of plate heat exchanger plate group production and processing. According to the technical scheme, the production line comprises an NC (numerical control) leveling and feeding three-in-one feeder, a punch forming machine, a gantry type punching machine, a cooling plate leveling machine, a high-precision shearing and combining machine, a double-end tack welding machine, a long-side double-end seam welding machine, a long-side double-end slitting machine and an automatic stacking machine which are sequentially arranged and connected through a conveying roller way. The conveying roller way adjusts the conveying speed and interval of the plate sheets according to the production takt time of all the stations, and therefore the production line can conduct continuous production. The automatic production line has the advantages that automatic production of the whole process from material coils to finished products is achieved, the production efficiency of heat exchanger sheets is greatly improved, the labor intensity of operators is reduced, meanwhile, the product quality is improved, powerful support is provided for meeting the requirement for rapid production development, and the automatic production line has extremely good application and popularization value.

Description

Technical Field

[0001] The invention relates to an automatic production line and method for plate heat exchanger plates, belonging to the technical field of production and processing of plate heat exchanger plate groups. Background Art

[0002] With the widespread application of heat-using equipment in industrial and civil fields, plate heat exchangers have become a very important equipment. Plate heat exchangers have the advantages of compact structure and high heat exchange efficiency, and are widely used in petroleum, chemical, metallurgy, electric power and other industries. Plate heat exchangers are a new type of high-efficiency heat exchanger composed of a series of heat exchanger plates with a certain corrugated shape. Thin rectangular channels are formed between various plates, and heat is exchanged through the plates. Compared with conventional shell and tube heat exchangers, its heat transfer coefficient is much higher under the same flow resistance and pump power consumption, and it has a trend of replacing shell and tube heat exchangers within the applicable range. At present, the production of plate heat exchanger plates with existing technology is still a multi-station, semi-automatic production mode, with more manual intervention, low production efficiency, and difficult to guarantee quality, which cannot further meet the user's high-efficiency production requirements. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic production line and method for plate heat exchanger plates, so as to realize the automated production of the whole process from material coils to finished products, greatly improve the production efficiency of heat exchanger plates, reduce the labor intensity of operators, and at the same time improve the quality of products, provide strong support for meeting the needs of rapid production development, have excellent value for promotion and use, and solve the above-mentioned technical problems existing in the existing technology.

[0004] The technical solution of the present invention is as follows: A plate heat exchanger plate automatic production line comprises an NC numerical control leveling and feeding three-in-one feeder, a stamping and forming machine, a gantry punching and cutting machine, a cooling plate leveling machine, a high-precision shearing and laminating machine, a double-head spot welding machine, a long-side double-head seam welding machine, a long-side double-head slitting machine and an automatic chip machine, which are arranged in sequence and connected by a conveyor roller; the NC numerical control leveling and feeding three-in-one feeder is used for automatic unloading, leveling of steel coils into plates and servo feeding during the stamping and forming process of plate heat exchanger plates; the stamping and forming machine performs flow channel stamping and forming on the leveled plates by hydraulic means, and stamps two plates on the front and back at the same time; the gantry punching and cutting machine adopts hydraulic means to cut the plates, and is also a machine with two molds, positive and negative. The two plates on the back are cut at the same time; the cooling plate leveling machine is used to level the two plates; the high-precision shearing and joining machine is used to accurately cut the single piece to size, and is used to compensate for the precision error of the NC three-in-one leveling and feeding feeder; the high-precision shearing and joining machine can join the front and back single pieces together to form a sheet group; the double-head spot fixing welding machine is used for intermittent spot fixing of the long sides of the plates after they are joined, so that the front and back pieces become a whole, preparing for the long side seam welding; the long side double-head seam welding machine is used to seam weld the two long sides of the spot-welded plates; the long side double-head longitudinal shearing machine is used to cut the long sides of the workpiece; the automatic chipping machine adopts a gantry trolley to quickly chip the welded plates through a gripper.

[0005] The conveying roller adjusts the conveying speed and interval of the plates according to the production rhythm of each workstation, so that the production line can produce continuously.

[0006] The NC numerically controlled leveling and feeding three-in-one feeder comprises two uncoilers, two sets of clamping platforms, a leveling and feeding device, an encoder detection device and a fixed frame. The two uncoilers are installed at the front end of the conveying roller and are respectively matched with a set of clamping platforms. The two uncoilers are respectively equipped with their own material coils. The clamping platform shears the material heads of the material coils neatly for the connection between the new and old material coils. A leveling and feeding device is arranged behind the uncoiler to level the material coils into plates and servo feed them. The leveling and feeding device is provided with two conveying rollers, which are respectively matched with the two uncoilers and convey the leveled plates. The fixed frame is the basis of the leveling and feeding device. The encoder detection device is used to feedback the feeding length to ensure the feeding accuracy. The above configuration can ensure that the subsequent sequence can simultaneously punch both positive and negative sheet types, saving the punching cycle.

[0007] The stamping machine includes an oil pressure molding machine and a molding die. The molding die is installed on the oil pressure molding machine. The molding die includes two sets of positive and negative mold cores, which are installed on a template. The positive and negative mold cores are matched with the plates conveyed on the two conveyor rollers respectively and perform positive and negative stamping respectively, punching out positive plates and negative plates respectively; a die changing frame is set on the side of the molding die, and the molding die can slide onto the die changing frame for fast mold change. The stamping machine is connected to an NC numerical control leveling and feeding three-in-one feeder. The production line adopts a stamping molding method, with high molding efficiency, stable product quality and good consistency.

[0008] The gantry punching and shearing machine comprises a hydraulic press, a cutting die and an auxiliary material rack. The hydraulic press is provided with a cutting die to match the positive plate and the negative plate after punching on the two conveyor rollers. Auxiliary material racks are respectively provided on the two conveyor rollers in front of the cutting die. The overall rigidity of the stamped single sheet is insufficient and the auxiliary material rack is required for auxiliary support. The single sheet enters the hydraulic press through the auxiliary material rack. The hydraulic press is provided with a cutting die to complete the sheet cutting.

[0009] The cooling plate leveling machine comprises a leveling frame, a leveling roller and a driving mechanism. The leveling frame is a basic component. The leveling roller and the driving mechanism are both installed on the leveling frame. The driving mechanism is connected to the leveling roller through a chain, and the outer edge of the leveling roller is covered with rubber. The driving mechanism is powered by a variable frequency motor, and the leveling roller is driven to rotate through the chain. The two sets of leveling rollers respectively complete the leveling of single plates cut off on the two conveyor rollers. The outer edge of the leveling roller is covered with rubber to protect the surface of the single plate from being scratched.

[0010] The high-precision shearing and splicing machine comprises a fine shearing machine and a splicing machine arranged on a conveying roller. The fine shearing machine has the same structure as the gantry punching machine, and the mold is a shearing mold; the splicing machine comprises a gantry assembly, a gripper transfer mechanism, a gripper lifting mechanism, a splicing gripper and a splicing material rack. The gantry assembly spans above the splicing material rack, the gripper transfer mechanism is installed on the gantry assembly and is equipped with a horizontal linear guide rail, the gripper transfer mechanism is connected to the transfer cylinder drive, and the transfer cylinder is extended and retracted to drive the gripper transfer mechanism to move; the gripper lifting mechanism is installed on the side of the gripper transfer mechanism and is equipped with a vertical linear guide rail, the splicing gripper is a sponge suction cup gripper, and is rigidly connected to the gripper lifting mechanism. The gripper lifting mechanism is connected with the lifting cylinder drive connection, and the lifting cylinder is extended and retracted to drive the sheet-closing gripper to move up and down, so as to grab the positive plate on the conveying roller, and place the positive plate on the negative plate for closing by cooperating with the gripper transfer mechanism; the sheet-closing rack comprises a frame body, a crossbeam, a guide mechanism and a pushing trolley, the frame body is the basis of the sheet-closing rack, the crossbeam is installed on the frame body, and a linear guide rail is arranged, and the crossbeam cylinder is extended and retracted to drive the crossbeam to be clamped and released; the guide mechanism is installed on the crossbeam, and is used to align the positive and negative plates in the width direction when closing; the pushing trolley is installed on the frame body, and a linear guide rail is arranged, and is driven by a servo motor to align the positive and negative plates in the length direction.

[0011] The double-head spot welding machine includes a spot welding body, a pressure head, a spot welding power supply and an end positioning mechanism. The spot welding body is the basis of the equipment. The pressure head, the spot welding power supply and the end positioning mechanism are all installed on the spot welding body. The end positioning mechanism cooperates with the sheet pushing trolley on the sheet material rack of the sheet joining machine to achieve the alignment of the length direction of the front and back sheets; the long sides of the front and back sheets are spot welded and fixed to form a whole, so that the heat exchanger sheet meets the seam welding requirements. The spot welding power supply (inside the body) adopts an inverter DC welding system, and the control of various welding parameters is more precise and stable to ensure the welding quality.

[0012] The long-side double-head seam welding machine comprises a seam welding body, a pressure head, a seam welding head, a welding wheel driving mechanism and a seam welding power supply. The welding body is the basis of the equipment. The pressure head and the welding wheel driving mechanism are both installed on the seam welding body. The seam welding head is rigidly connected to the pressure head. The pressure head is used to tighten and relax the workpiece. The seam welding power supply is an inverter AC system, which provides power for the long-side double-head seam welding machine. The control of various welding parameters is more precise and stable, which is suitable for seam welding and ensures welding quality.

[0013] The long-side double-head slitting machine includes a machine base, a slitting shear, a cutting knife and a second driving mechanism. The machine base is the foundation of the equipment, and the slitting shear, the cutting knife and the second driving mechanism are all installed on the machine base; the second driving mechanism is powered by a variable frequency motor, and drives the slitting shear and the cutting knife to rotate and cut materials through a gear set. The slitting shear and the cutting knife can handle the cutting of bidirectional stainless steel. The long-side double-head slitting machine is used to cut the long side of the workpiece to ensure the full width and facilitate the assembly of the subsequent sheet groups.

[0014] The automatic chip machine includes a second rack assembly, a second gripper transfer mechanism, a second gripper lifting mechanism, a gripper flipping mechanism, a gripper, a material receiving rack and a material taking rack. The second rack assembly spans above the material taking rack. The second gripper transfer mechanism is installed on the second crossbeam of the rack assembly and is equipped with a horizontal rail. It is driven by a second servo motor to drive the second gripper lifting mechanism to move. The second gripper lifting mechanism is installed on the side of the second gripper transfer mechanism and is equipped with a vertical guide rail. It is driven by a third servo motor to drive the gripper flipping mechanism to move. The gripper flipping mechanism is rigidly connected to the second gripper lifting mechanism, and the gripper is flipped by a fourth servo motor. The gripper is a sponge suction cup gripper, which is rigidly connected to the gripper flipping mechanism. The material receiving rack is tilted to ensure that the material will not fall over when the material is being stacked. After the material is stacked, the operator manually completes the assembly of the sheet group on the material receiving rack, and then the entire set of sheet groups is hoisted to the subsequent workstation. At this point, the single-sheet processing process is completed.

[0015] The conveyor roller comprises a frame 2, a conveyor roller, a side roller, a clamping mechanism and a driving mechanism 3. The frame 2 is the main body of the conveyor roller. The conveyor roller, the side roller, the clamping mechanism and the driving mechanism 3 are all installed on the frame 2. When the workpiece is conveyed, the clamping mechanism presses the workpiece onto the conveyor roller. The driving mechanism 3 is powered by a servo motor 5, which drives the conveyor roller to rotate through a chain, thereby driving the workpiece forward and backward. Before the sheet-joining process, the conveyor rollers are all double-linked rollers, and after the sheet-joining process, they are single-linked rollers.

[0016] An automatic production method for plate heat exchanger plates, using the above-mentioned automatic production line for plate heat exchanger plates, the steps are as follows; The NC leveling and feeding three-in-one feeder is used for automatic unloading, leveling into plates and servo feeding of steel coils during the stamping and forming process of plate heat exchanger plates; the stamping and forming machine uses hydraulic method to perform flow channel stamping and forming on the leveled plates, and stamps two plates on the front and back at the same time; the gantry punching and cutting machine uses hydraulic method to cut plates; the cooling plate leveling machine is used to level two plates; the high-precision shearing and laminating machine is used to accurately cut single plates; the high-precision shearing and laminating machine combines the front and back single plates together to form a plate group; the double-head spot welding machine is used for intermittent spot fixing of the long sides of the plates after lamination, so that the front and back plates become a whole; the long side double-head seam welding machine is used to seam weld the two long sides of the spot-welded plates; the long side double-head longitudinal shearing machine is used to cut the long sides of the workpiece; the automatic chipping machine uses a gantry trolley to quickly chip the welded plates through a gripper.

[0017] The present invention realizes the automatic production of plate heat exchanger plates, including coiling, automatic stamping, cutting to length, high-precision shearing, leveling, sheeting, spot fixing, long side seam welding, long side shearing and automatic sheet stacking. The conveying rollers between each station cooperate with each other to realize the full automation of the above process.

[0018] The positive effects of the present invention are: realizing the automated production of the entire process from material coils to finished products, greatly improving the production efficiency of heat exchanger plates, reducing the labor intensity of operators, and improving the quality of products, providing strong support for meeting the needs of rapid production development, and having excellent value for promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1. It is a schematic diagram of the top view of the structure of the NC numerically controlled leveling and feeding three-in-one feeder according to an embodiment of the present invention; Figure 2 1 is a schematic diagram of a top view of the structure of a stamping and forming machine according to an embodiment of the present invention; Figure 3 1 is a schematic diagram of a plan view of the structure of a gantry punching and shearing machine according to an embodiment of the present invention; Figure 4 2 is a schematic diagram of the structure of a cooling plate leveling machine according to an embodiment of the present invention; Figure 5 2. It is a schematic diagram of the structure of a high-precision shearing and laminating machine according to an embodiment of the present invention; Figure 6 2 is a schematic structural diagram of a double-head spot welding machine according to an embodiment of the present invention; Figure 7 Schematic diagram of the structure of a long side double-head seam welding machine according to an embodiment of the present invention; Figure 8 2. It is a schematic structural diagram of a long-side double-head slitting machine according to an embodiment of the present invention; Fig. 9 It is a schematic diagram of the structure of an automatic chip machine according to an embodiment of the present invention; Fig.10 2. It is a schematic diagram of the structure of a conveyor roller table according to an embodiment of the present invention; The markings in the figure are as follows: unwinder 1.1, clamping platform 1.2, leveling feeding device 1.3, encoder detection device 1.4, fixed frame 1.5, hydraulic forming machine 2.1, forming mold 2.2, mold changing frame 2.3, auxiliary material frame 3.1, hydraulic press 3.2, cutting mold 3.3, leveling frame 4.1, leveling roller 4.2, driving mechanism 1 4.3, truss assembly 1 5.1, gripper transfer mechanism 1 5.2, gripper lifting mechanism 1 5.3, sheet clamping gripper 5.4, sheet clamping frame 5.5, frame 1 5.5.1, crossbeam 5.5.2, guide mechanism 5.5.3, material pusher 5.5.4, Point fixing body 6.1, point fixing power supply 6.2, pressure head 6.3, end positioning mechanism 6.4, seam welding body 7.1, pressure head 7.2, seam welding head 7.3, welding wheel driving mechanism 7.4, seam welding power supply 7.5, machine base 8.1, slitting shears 8.2, cutting knife 8.3, driving mechanism II 8.4, truss assembly II 9.1, gripper transfer mechanism II 9.2, gripper lifting mechanism II 9.3, gripper flipping mechanism 9.4, gripper 9.5, material receiving rack 9.6, material taking rack 9.7, frame II 10.1, conveying roller 10.2, side roller 10.3, clamping mechanism 10.4, driving mechanism III 10.5. DETAILED DESCRIPTION

[0020] The present invention is further described in detail by the following examples.

[0021] A plate heat exchanger plate automatic production line comprises an NC numerical control leveling and feeding three-in-one feeder, a stamping and forming machine, a gantry punching and cutting machine, a cooling plate leveling machine, a high-precision shearing and laminating machine, a double-head spot welding machine, a long-side double-head seam welding machine, a long-side double-head slitting machine and an automatic chip machine, which are arranged in sequence and connected by a conveyor roller; the NC numerical control leveling and feeding three-in-one feeder is used for automatic unloading, leveling of steel coils into plates and servo feeding during the stamping and forming process of plate heat exchanger plates; the stamping and forming machine performs flow channel stamping and forming on the leveled plates by hydraulic means, and stamps two plates on the front and back at the same time; the gantry punching and cutting machine adopts hydraulic means to cut the plates, and is also a machine with two molds, positive and negative. The two plates on the back are cut at the same time; the cooling plate leveling machine is used to level the two plates; the high-precision shearing and joining machine is used to accurately cut the single piece to size, and is used to compensate for the precision error of the NC three-in-one leveling and feeding feeder; the high-precision shearing and joining machine can join the front and back single pieces together to form a sheet group; the double-head spot fixing welding machine is used for intermittent spot fixing of the long sides of the plates after they are joined, so that the front and back pieces become a whole, preparing for the long side seam welding; the long side double-head seam welding machine is used to seam weld the two long sides of the spot-welded plates; the long side double-head longitudinal shearing machine is used to cut the long sides of the workpiece; the automatic chipping machine adopts a gantry trolley to quickly chip the welded plates through a gripper.

[0022] The conveying roller adjusts the conveying speed and interval of the plates according to the production rhythm of each workstation, so that the production line can produce continuously.

[0023] See attached Figure 1 The NC numerically controlled leveling and feeding three-in-one feeder comprises two uncoilers 1.1, two sets of clamping platforms 1.2, a leveling and feeding device 1.3, an encoder detection device 1.4 and a fixed frame 1.5. The two uncoilers 1.1 are installed at the front end of the conveying roller, and are matched with a set of clamping platforms 1.2 respectively. The two uncoilers 1.1 are respectively equipped with their own material coils, and the clamping platforms 1.2 cut the material heads of the material coils neatly for the docking of new and old material coils; a leveling and feeding device 1.3 is arranged behind the uncoiler 1.1, which is used to level the material coils into plates and servo feed them. The leveling and feeding device 1.3 is provided with two conveying rollers, which are matched with the two uncoilers 1.1 respectively and convey the leveled plates. The fixed frame 1.5 is the basis of the leveling and feeding device; the encoder detection device 1.4 is used to feedback the feeding length to ensure the feeding accuracy; the above configuration can ensure that the subsequent sequence can simultaneously punch both positive and negative sheet types, saving the punching cycle.

[0024] See attached Figure 2 The stamping machine includes an oil pressure molding machine 2.1 and a molding die 2.2. The molding die 2.2 is installed on the oil pressure molding machine 2.1. The molding die 2.2 includes two sets of positive and negative mold cores, which are installed on a template. The positive and negative mold cores are matched with the plates conveyed on the two conveyor rollers and perform positive and negative stamping respectively, punching out positive plates and negative plates respectively; a die changing frame 2.3 is set on the side of the molding die 2.2, and the molding die 2.2 can slide onto the die changing frame 2.3 for fast mold change. The stamping machine is connected to an NC numerical control leveling and feeding three-in-one feeder. The production line adopts a stamping molding method, with high molding efficiency, stable product quality and good consistency.

[0025] See attached Figure 3 The gantry punching and shearing machine includes a hydraulic press 3.2, a cutting die 3.3 and an auxiliary material rack 3.1. The cutting die 3.3 is arranged on the hydraulic press 3.2 to match the positive plate and the negative plate after punching on the two conveyor rollers. The auxiliary material racks 3.1 are respectively arranged on the two conveyor rollers in front of the cutting die 3.3. The overall rigidity of the stamped single piece is insufficient, and the auxiliary material rack 3.1 is required for auxiliary support. The auxiliary material rack 3.1 enters the hydraulic press 3.2 through the auxiliary material rack 3.1. The hydraulic press 3.2 is equipped with a cutting die 3.3 to complete the plate cutting.

[0026] See attached Figure 4The cooling plate leveling machine comprises a leveling frame 4.1, a leveling roller 4.2 and a driving mechanism 4.3. The leveling frame 4.1 is a basic component. The leveling roller 4.2 and the driving mechanism 4.3 are both installed on the leveling frame 4.1. The driving mechanism 4.3 is connected to the leveling roller by a chain, and the outer edge of the leveling roller 4.2 is covered with rubber; the driving mechanism 4.3 is powered by a variable frequency motor, and the leveling roller 4.2 is driven to rotate by the chain. The two sets of leveling rollers 4.2 respectively complete the leveling of the single plates cut off on the two conveying rollers. The outer edge of the leveling roller 4.2 is covered with rubber to protect the surface of the single plate from being scratched.

[0027] See attached Figure 5 The high-precision shearing and splicing machine includes a fine shearing machine and a splicing machine arranged on a conveyor roller. The fine shearing machine has the same structure as the gantry punching machine, and the mold is a shearing mold; the splicing machine includes a gantry assembly 5.1, a gripper transfer mechanism 5.2, a gripper lifting mechanism 5.3, a splicing gripper 5.4 and a splicing material rack 5.5. The gantry assembly 5.1 spans above the splicing material rack 5.5, the gripper transfer mechanism 5.2 is installed on the gantry assembly 5.1 and is equipped with a horizontal linear guide rail, the gripper transfer mechanism 5.2 is connected to the transfer cylinder drive, and the transfer cylinder is extended and retracted to drive the gripper transfer mechanism 5.2 to move; the gripper lifting mechanism 5.3 is installed on the side of the gripper transfer mechanism 5.2 and is equipped with a vertical linear guide rail, the splicing gripper 5.4 is a sponge suction cup gripper, which is rigidly connected to the gripper lifting mechanism 5.3, and the gripper lifting mechanism 5.3 is connected to the sponge suction cup gripper. The lifting cylinder drive connection, through the extension and retraction of the lifting cylinder, drives the sheet-closing gripper 5.4 to move up and down, grabs the positive plate on the conveyor roller, and places the positive plate on the negative plate for closing by cooperating with the gripper transfer mechanism 5.2; the sheet-closing material rack 5.5 includes a frame 5.5.1, a beam 5.5.2, a guide mechanism 5.5.3 and a pusher trolley 5.5.4, the frame 5.5.1 is the basis of the sheet-closing material rack 5.5, the beam 5.5.2 is installed on the frame 5.5.1, and is equipped with a linear guide rail. The crossbeam cylinder is extended and retracted to drive the crossbeam 5.5.2 to clamp and release; the guide mechanism 5.5.3 is installed on the crossbeam 5.5.2, and is used to align the positive and negative plates in width direction when closing; the pusher trolley 5.5.4 is installed on the frame 5.5.1, and is equipped with a linear guide rail. It is driven by a servo motor 1 to align the positive and negative plates in length direction.

[0028] See attached Figure 6The double-head spot welding machine includes a spot welding body 6.1, a pressure head 6.3, a spot welding power supply 6.2 and an end positioning mechanism 6.4. The spot welding body 6.1 is the equipment foundation. The pressure head 6.3, the spot welding power supply 6.2 and the end positioning mechanism 6.4 are all installed on the spot welding body 6.1. The end positioning mechanism 6.4 cooperates with the sheet pushing trolley 5.5.4 on the sheet material rack 5.5 of the sheet welding machine to achieve the alignment of the length direction of the front and back sheets, which is convenient for the subsequent spot welding work; the long sides of the front and back sheets are spot welded and fixed to form a whole, so that the heat exchanger sheet meets the seam welding requirements. The spot welding power supply 6.2 adopts an inverter DC welding system, and the control of various welding parameters is more accurate and stable to ensure the welding quality.

[0029] See attached Figure 7 The long side double-head seam welding machine comprises a seam welding body 7.1, a pressure head 7.2, a seam welding head 7.3, a welding wheel driving mechanism 7.4 and a seam welding power supply 7.5. The welding body 7.1 is the equipment foundation. The pressure head 7.2 and the welding wheel driving mechanism 7.4 are both installed on the seam welding body 7.1. The seam welding head 7.3 is rigidly connected to the pressure head 7.2. The pressure head 7.2 is used to realize the compression and relaxation of the workpiece. The seam welding power supply 7.5 is an inverter AC system, which provides power for the long side double-head seam welding machine. The control of various welding parameters is more accurate and stable, which is suitable for seam welding and ensures the welding quality.

[0030] See attached Figure 8 The long-side double-head slitting machine includes a machine base 8.1, a slitting shear 8.2, a cutting knife 8.3 and a driving mechanism 8.4. The machine base 8.1 is the foundation of the equipment. The slitting shear 8.2, the cutting knife 8.3 and the driving mechanism 8.4 are all installed on the machine base 8.1; the driving mechanism 8.4 is powered by a variable frequency motor, and the slitting shear 8.2 and the cutting knife 8.3 are driven by a gear set to rotate and cut materials. The slitting shear 8.2 and the cutting knife 8.3 can handle the cutting of bidirectional stainless steel. The long-side double-head slitting machine is used to cut the long side of the workpiece to ensure the full width and facilitate the assembly of the subsequent sheet groups.

[0031] See attached Fig. 9The automatic code chip machine includes a truss assembly 9.1, a gripper transfer mechanism 9.2, a gripper lifting mechanism 9.3, a gripper flipping mechanism 9.4, a gripper 9.5, a material receiving rack 9.6 and a material taking rack 9.7. The truss assembly 9.1 spans above the material taking rack 9.7. The gripper transfer mechanism 9.2 is installed on the crossbeam of the truss assembly 9.1 and is equipped with a horizontal rail. It is driven by a servo motor 2 to drive the gripper lifting mechanism 9.3 to move; the gripper lifting mechanism 9.3 is installed on the side of the gripper transfer mechanism 9.2 and is equipped with a vertical guide rail. It is driven by a servo motor 3 to drive the gripper flipping mechanism 9.4 to rise and fall. The gripper flipping mechanism 9.4 is rigidly connected to the gripper lifting mechanism 9.3, and the gripper 9.5 is flipped by a servo motor 4; the gripper 9.5 is a sponge suction cup gripper, which is rigidly connected to the gripper flipping mechanism 9.4; the material receiving rack 9.6 is arranged at an angle to ensure that the material sheets will not fall over when coding. After the materials are stacked, the operator manually assembles the sheet group on the receiving rack, and then the entire set of sheets is hoisted to the subsequent workstation. At this point, the single-sheet processing process is completed.

[0032] See attached Fig.10 The conveying roller comprises a frame 10.1, a conveying roller 10.2, a side roller 10.3, a clamping mechanism 10.4 and a driving mechanism 10.5. The frame 10.1 is the main body of the conveying roller. The conveying roller 10.2, the side roller 10.3, the clamping mechanism 10.4 and the driving mechanism 10.5 are all installed on the frame 10.1. When the workpiece is conveyed, the clamping mechanism 10.4 presses the workpiece onto the conveying roller 10.2. The driving mechanism 10.5 is powered by a servo motor 5, and drives the conveying roller 10.2 to rotate through a chain, thereby driving the workpiece to move forward and backward. Before the sheet-joining process, the conveying rollers are all double rollers, and after the sheet-joining process, they are single rollers.

[0033] An automatic production method for plate heat exchanger plates, using the above-mentioned automatic production line for plate heat exchanger plates, the steps are as follows; The NC leveling and feeding three-in-one feeder is used for automatic unloading, leveling into plates and servo feeding of steel coils during the stamping and forming process of plate heat exchanger plates; the stamping and forming machine uses hydraulic method to perform flow channel stamping and forming on the leveled plates, and stamps two plates on the front and back at the same time; the gantry punching and cutting machine uses hydraulic method to cut plates; the cooling plate leveling machine is used to level two plates; the high-precision shearing and laminating machine is used to accurately cut single plates; the high-precision shearing and laminating machine combines the front and back single plates together to form a plate group; the double-head spot welding machine is used for intermittent spot fixing of the long sides of the plates after lamination, so that the front and back plates become a whole; the long side double-head seam welding machine is used to seam weld the two long sides of the spot-welded plates; the long side double-head longitudinal shearing machine is used to cut the long sides of the workpiece; the automatic chipping machine uses a gantry trolley to quickly chip the welded plates through a gripper.

[0034] The present invention realizes the automatic production of plate heat exchanger plates, including coiling, automatic stamping, cutting to length, high-precision shearing, leveling, sheeting, spot fixing, long side seam welding, long side shearing and automatic sheet stacking. The conveying rollers between each station cooperate with each other to realize the full automation of the above process.

[0035] The NC three-in-one leveling and feeding feeder is equipped with two uncoilers, installed at the front end of the entire line, and equipped with two sets of manual welding platforms (pressing platforms), which can cut the material heads neatly for the docking of new material coils; a leveling feeding device is connected at the back for coil leveling and servo feeding; an encoder detection device is used to feedback the feeding length; the fixed frame is the main body of the leveling feeder.

[0036] The front and back mold cores of the punching machine are installed on a template, and a mold changing frame is also configured for fast mold changing. The gantry punching machine includes an oil press, a cutting die and an auxiliary material rack. The cooling plate leveling machine includes a leveling frame, a leveling roller and a driving mechanism. The leveling roller and the driving mechanism are both installed on the leveling frame, and the leveling roller is covered with rubber.

[0037] The high-precision shearing and splicing machine includes a fine shearing machine and a splicing machine. The fine shearing machine has the same structure as the above-mentioned gantry punching machine, but the mold is different, which will not be described here; the splicing machine includes a gantry assembly, a gripper transfer mechanism, a gripper lifting mechanism, a splicing gripper and a splicing material rack. The gantry assembly spans above the splicing material rack, the gripper transfer mechanism is installed on a crossbeam of the gantry assembly, and is equipped with a linear guide rail. The gripper transfer mechanism is extended and retracted by the transfer cylinder to drive the gripper transfer mechanism to move; the gripper lifting mechanism is installed on a side of the gripper transfer mechanism, and is equipped with a linear guide rail. The lifting cylinder is extended and retracted to drive the splicing gripper up and down; the splicing gripper is a sponge suction cup gripper, which is rigidly connected to the gripper lifting mechanism; the splicing material rack includes a frame body, a crossbeam, a guide mechanism and a pushing trolley. Frame one is the base of the sheet material rack, the crossbeam is installed on frame one and is equipped with a linear guide rail. The crossbeam cylinder is extended and retracted to drive the crossbeam to be clamped and relaxed; the guide mechanism is installed on the crossbeam and is used to align the width direction of the two sheets when the sheets are closed; the pusher trolley is installed on frame one and is equipped with a linear guide rail. It is driven by servo motor one to align the length direction of the front and back sheets.

[0038] The double-head spot fixing welding machine includes a spot fixing body, a pressure head, a spot fixing power supply and an end positioning mechanism. The spot fixing body is the basis of the equipment. The pressure head, the spot fixing power supply and the end positioning mechanism are all installed on the spot fixing body. Among them, the end positioning mechanism cooperates with the film pushing trolley on the previous film combining rack to achieve the alignment of the length direction of the front and back films, which is convenient for the subsequent spot fixing work.

[0039] The long-side double-head seam welding machine includes a seam welding body, a pressure head, a seam welding head, a welding wheel driving mechanism and a seam welding power supply, etc. The welding body is the basis of the equipment, the pressure head, the welding wheel driving mechanism and the welding power supply are all installed on the seam welding body, and the seam welding head is rigidly connected to the pressure head.

[0040] The long-side double-head slitting machine comprises a machine base, slitting shears, a cutting knife and a second driving mechanism. The machine base is the foundation of the equipment, and the slitting shears, the cutting knife and the second driving mechanism are all installed on the machine base.

[0041] The automatic chip coding machine includes a second frame assembly, a second gripper transfer mechanism, a second gripper lifting mechanism, a gripper flipping mechanism, a gripper, a material receiving rack and a material taking rack. The second frame assembly spans above the material taking rack. The second gripper transfer mechanism is installed on the crossbeam of the second frame assembly and is equipped with a steel rail. It is driven by a second servo motor to drive the second gripper lifting mechanism to move. The second gripper lifting mechanism is installed on the side of the second gripper transfer mechanism and is equipped with a linear guide rail. It is driven by a third servo motor to drive the gripper flipping mechanism to rise and fall. The gripper flipping mechanism is rigidly connected to the second gripper lifting mechanism and is driven to flip by a fourth servo motor. The gripper is a sponge suction cup gripper and is rigidly connected to the gripper flipping mechanism. The material receiving rack is arranged at an angle to ensure that the material sheets will not fall over when coding.

[0042] The conveying roller comprises a frame body 2, conveying rollers, side rollers, a clamping mechanism and a driving mechanism 3. The frame body 2 is the main body of the conveying roller, and the conveying rollers, side rollers, a clamping mechanism and a driving mechanism 3 are all installed on the frame body 2. When the workpiece is conveyed, the clamping mechanism presses the workpiece onto the conveying roller, and the driving mechanism 3 drives the conveying roller to rotate through the chain, thereby driving the workpiece to move forward and backward.

Claims

1. An automatic production line for plate heat exchanger, characterized by: It includes an NC leveling and feeding three-in-one feeder, a stamping machine, a gantry punching machine, a cooling plate leveling machine, a high-precision shearing and laminating machine, a double-head spot welding machine, a long-side double-head seam welding machine, a long-side double-head slitting machine and an automatic chip machine, which are arranged in sequence and connected by a conveyor roller; the NC leveling and feeding three-in-one feeder is used for automatic unloading, flattening into plates and servo feeding of steel coils during the stamping and forming process of plate heat exchanger plates; the stamping machine performs flow channel stamping and forming on the flattened plates by hydraulic means, and stamps two plates on the front and back at the same time; the gantry punching and cutting machine adopts hydraulic means to cut the plates, and it is also a machine with two molds, and the front and back plates can be cut at the same time The cooling plate leveling machine is used to level two plates; the high-precision shearing and joining machine is used to accurately cut a single piece to size, and is used to compensate for the accuracy error of the NC three-in-one leveling and feeding feeder; the high-precision shearing and joining machine can put the front and back single pieces together to form a sheet group; the double-head spot fixing welding machine is used for intermittent spot fixing of the long sides of the plates after they are joined, so that the front and back pieces become a whole, preparing for the long side seam welding; the long side double-head seam welding machine is used to seam weld the two long sides of the spot-welded plates; the long side double-head longitudinal shearing machine is used to cut the long sides of the workpiece; the automatic chipping machine adopts a gantry trolley to quickly chip the welded plates through a gripper.

2. The plate heat exchanger plate automatic production line according to claim 1, characterized in that: The conveying roller adjusts the conveying speed and interval of the plates according to the production rhythm of each workstation, so that the production line can produce continuously.

3. The plate heat exchanger plate automatic production line according to claim 1 or 2, characterized in that: The NC numerically controlled leveling and feeding three-in-one feeder comprises two uncoilers (1.1), two sets of clamping platforms (1.2), a leveling and feeding device (1.3), an encoder detection device (1.4) and a fixed frame (1.5). The two uncoilers (1.1) are installed at the front end of the conveying roller and are respectively matched with a set of clamping platforms (1.2). The two uncoilers (1.1) are respectively equipped with their own material coils. The clamping platforms (1.2) cut the material heads of the material coils neatly for docking the new and old material coils. A leveling and feeding device (1.3) is arranged behind the uncoilers (1.1) for leveling the material coils into plates and servo feeding. The leveling and feeding device (1.3) is provided with two conveying rollers, which are respectively matched with the two uncoilers (1.1) and convey the leveled plates. The fixed frame (1.5) is the basis of the leveling and feeding device. The encoder detection device (1.4) is used to feedback the feeding length to ensure the feeding accuracy.

4. The plate heat exchanger plate automatic production line according to claim 3, characterized in that: The stamping forming machine comprises an oil pressure forming machine (2.1) and a forming die (2.2); the forming die (2.2) is mounted on the oil pressure forming machine (2.1); the forming die (2.2) comprises two sets of positive and negative mold cores, which are mounted on a template; the two sets of positive and negative mold cores are matched with plates conveyed on two conveying rollers respectively and perform positive and negative stamping respectively, so as to punch out positive plates and negative plates respectively; a die changing frame (2.3) is arranged on the side of the forming die (2.2); the forming die (2.2) can slide onto the die changing frame (2.3) for rapid die changing.

5. The plate heat exchanger plate automatic production line according to claim 4, characterized in that: The gantry punching and shearing machine comprises a hydraulic press (3.2), a cutting die (3.3) and an auxiliary material rack (3.1); the cutting die (3.3) is arranged on the hydraulic press (3.2) to match the positive plate and the negative plate after punching on the two conveyor rollers; the auxiliary material racks (3.1) are respectively arranged on the two conveyor rollers in front of the cutting die (3.3).

6. The plate heat exchanger plate automatic production line according to claim 3, characterized in that: The cooling plate leveling machine comprises a leveling frame (4.1), a leveling roller (4.2) and a driving mechanism (4.3); the leveling frame (4.1) is a basic component; the leveling roller (4.2) and the driving mechanism (4.3) are both mounted on the leveling frame (4.1); the driving mechanism (4.3) is connected to the leveling roller via a chain; the outer edge of the leveling roller (4.2) is coated with rubber; the driving mechanism (4.3) is powered by a variable frequency motor and drives the leveling roller (4.2) to rotate via a chain; the two sets of leveling rollers (4.2) respectively complete the leveling of single plates cut off on two conveying rollers; the outer edge of the leveling roller (4.2) is coated with rubber.

7. The plate heat exchanger plate automatic production line according to claim 6, characterized in that: The high-precision shearing and splicing machine comprises a fine shearing machine and a splicing machine arranged on a conveying roller, the fine shearing machine has the same structure as the gantry punching machine, and the mold is a shearing mold; the splicing machine comprises a truss assembly (5.1), a gripper transfer mechanism (5.2), a gripper lifting mechanism (5.3), a splicing gripper (5.4) and a splicing material rack (5.5), the truss assembly (5.1) spans above the splicing material rack (5.5), and the gripper transfer mechanism (5.2) is installed A horizontal linear guide rail is arranged on the truss assembly 1 (5.1), and a gripper transfer mechanism 1 (5.2) is connected to the transfer cylinder drive. The transfer cylinder is extended and retracted to drive the gripper transfer mechanism 1 (5.2) to move. A gripper lifting mechanism 1 (5.3) is installed on the side of the gripper transfer mechanism 1 (5.2) and is arranged with a vertical linear guide rail. The combined gripper (5.4) is a sponge suction cup gripper, which is rigidly connected to the gripper lifting mechanism 1 (5.3). The gripper lifting mechanism 1 (5.3) is connected to the lifting mechanism 1 (5.3). The lowering cylinder is driven and connected, and the lifting cylinder is extended and retracted to drive the sheet-closing gripper (5.4) to move up and down, grab the positive sheet on the conveying roller, and place the positive sheet on the negative sheet for sheet-closing by cooperating with the gripper transfer mechanism 1 (5.2); the sheet-closing material rack (5.5) includes a frame 1 (5.5.1), a crossbeam (5.5.2), a guide mechanism (5.5.3) and a pusher trolley (5.5.4), and the frame 1 (5.5.1) is the basis of the sheet-closing material rack (5.5). The crossbeam (5.5.2) is mounted on the frame (5.5.1) and is equipped with a linear guide rail. The crossbeam cylinder is extended and retracted to drive the crossbeam (5.5.2) to be clamped and released; the guide mechanism (5.5.3) is mounted on the crossbeam (5.5.2) and is used to align the front and back plates in width when closing the plates; the pusher trolley (5.5.4) is mounted on the frame (5.5.1) and is equipped with a linear guide rail. It is driven by a servo motor and is used to align the front and back plates in length.

8. The plate heat exchanger plate automatic production line according to claim 7, characterized in that: The double-head spot welding machine comprises a spot welding body (6.1), a pressure head (6.3), a spot welding power supply (6.2) and an end positioning mechanism (6.4); the spot welding body (6.1) is the basis of the equipment; the pressure head (6.3), the spot welding power supply (6.2) and the end positioning mechanism (6.4) are all installed on the spot welding body (6.1); the end positioning mechanism (6.4) cooperates with a sheet pushing trolley (5.5.4) on a sheet bonding rack (5.5) of a sheet bonding machine to achieve alignment of the front and back sheets in the length direction.

9. The plate heat exchanger plate automatic production line according to claim 1 or 2, characterized in that: The automatic chip machine comprises a gantry assembly 2 (9.1), a gripper transfer mechanism 2 (9.2), a gripper lifting mechanism 2 (9.3), a gripper flipping mechanism (9.4), a gripper (9.5), a material receiving rack (9.6) and a material taking rack (9.7). The gantry assembly 2 (9.1) spans above the material taking rack (9.7), the gripper transfer mechanism 2 (9.2) is installed on the crossbeam of the gantry assembly 2 (9.1) and is equipped with a horizontal rail, and is driven by a servo motor 2 to drive the gripper lifting mechanism 2 (9.3) to move. The second gripper lifting mechanism (9.3) is installed on the side of the second gripper transfer mechanism (9.2) and is equipped with a vertical guide rail. It is driven by the third servo motor to drive the gripper flipping mechanism (9.4) to rise and fall. The gripper flipping mechanism (9.4) is rigidly connected to the second gripper lifting mechanism (9.3). The gripper (9.5) is flipped by the fourth servo motor. The gripper (9.5) is a sponge suction cup gripper, which is rigidly connected to the gripper flipping mechanism (9.4). The material receiving frame (9.6) is arranged at an angle to ensure that the material sheets will not fall over when stacking the materials.

10. A method for automatically producing plate sheets for plate heat exchangers, characterized in that The plate heat exchanger plate automatic production line according to any one of claims 1 to 9 is adopted, and the steps are as follows: the NC three-in-one leveling and feeding feeder is used for automatic unloading, leveling and servo feeding of steel coils in the process of plate heat exchanger plate stamping and forming; the stamping and forming machine performs flow channel stamping and forming on the leveled plate by hydraulic means, and stamps two plates on the front and back at the same time; the gantry punching and cutting machine uses hydraulic means to cut the plate; the cooling plate leveling machine is used to level the two plates Leveling; the high-precision shearing and laminating machine is used to cut single sheets to precise sizes; the high-precision shearing and laminating machine combines the front and back single sheets together to form a sheet group; the double-head spot fixing welding machine is used to intermittently spot fix the long sides of the sheet after laminating, so that the front and back sheets become a whole; the long-side double-head seam welding machine is used to seam weld the two long sides of the spot-welded sheet; the long-side double-head longitudinal shearing machine is used to cut the long sides of the workpiece; the automatic chipping machine adopts a gantry trolley to quickly chip the welded sheets through a gripper.

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