Automatic plate bending machine and using method thereof

Abstract

The invention belongs to the technical field of metal part machining, and particularly relates to an automatic plate bending machine which comprises a machine body, and a lower die mounting table is arranged on the front side of the machine body; the upper mold mounting table is arranged on the machine body and located above the lower mold mounting table, and the upper mold mounting table can move up and down in the vertical direction; the hydraulic system comprises a hydraulic pump and a hydraulic cylinder which are connected through an oil pipe; the control system comprises a control center arranged on the machine body; the positioning mechanism is arranged on the machine body and located on the rear side of the lower die, and the positioning mechanism comprises a sliding stop block capable of controlling the insertion depth of a plate material; the upper die unit comprises a plurality of upper die pressing blocks which are detachably arranged on the upper die mounting table; and the lower die unit comprises a plurality of lower die pressing blocks detachably arranged on the lower die mounting table, and compared with the prior art, the bending precision of the plate is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal part processing, and particularly relates to an automatic sheet metal bending machine and a using method thereof. Background Art

[0002] A sheet metal bending machine is a device used for bending sheet metal, usually composed of a fuselage with an all-steel welded structure, a hydraulic system, a control system, and upper and lower dies. For example, a multifunctional hydraulic sheet metal bending machine disclosed in a patent with the application number CN201921109306.5 includes a bending machine main body. A universal wheel is arranged at the lower end of the bending machine main body. A base is arranged on the outer surface of the upper end of the universal wheel. A workbench is arranged on the outer surface of the upper end of the base. A bending die is arranged on the outer surface of the upper end of the workbench. A left oil cylinder and a right oil cylinder are arranged on the outer surface of the upper end of the bending die. The left oil cylinder is located on one side of the right oil cylinder. An electrical system is arranged on the outer surface of one side of the bending machine main body. An equipment controller is arranged on the outer surface of the upper end of the electrical system. During the use of this existing sheet metal bending machine, the positioning of the sheet metal and the moving distance of the upper and lower dies both depend on manual control by workers, which is prone to human error, reducing the bending accuracy of the sheet metal. Moreover, during the long-term high-pressure operation of the hydraulic system, the oil pipe connections are prone to looseness, oil leakage, or pressure fluctuations, further affecting the bending accuracy of the sheet metal. At the same time, the replacement operation efficiency of the die is low, reducing the work efficiency. Therefore, it is necessary to make improvements. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic sheet metal bending machine and a using method thereof for the above-mentioned existing technical problems, so as to effectively improve the bending accuracy of the sheet metal and improve the work efficiency.

[0004] In view of this, the present invention provides an automatic sheet metal bending machine, including: A fuselage, and a lower die mounting table is arranged on the front side of the fuselage; An upper die mounting table, which is arranged on the fuselage and is located above the lower die mounting table, and the upper die mounting table can move up and down along the vertical direction; A hydraulic system, which includes a hydraulic pump and a hydraulic cylinder connected by an oil pipe; A control system, which includes a control center arranged on the fuselage; Characterized in that it further includes: A positioning mechanism, which is arranged on the fuselage and is located at the rear side of the lower die. The positioning mechanism includes a sliding block that can control the insertion depth of the sheet metal; An upper die unit, which includes a plurality of upper die pressing blocks detachably arranged on the upper die mounting table; Lower die unit, the lower die unit includes several lower die blocks detachably arranged on the lower die mounting table; Among them, the upper die mounting table is driven by a hydraulic cylinder to move up and down in the vertical direction. Serial numbers composed of die block parameters are engraved on both the upper die block and the lower die block. The control center is built-in with stamping parameters matching the serial numbers. The control center automatically matches the parameters by inputting the serial numbers of the upper die block and the lower die block to realize the automatic control of the upper die block and the lower die block.

[0005] In this technical solution, through the setting of the positioning mechanism, the insertion depth of the sheet material can be effectively controlled, which is convenient for automatically positioning the sheet material, improving the bending accuracy of the sheet material. At the same time, by using the serial number composed of die block parameters, the staff can directly input the serial numbers of the upper die block and the lower die block through the control center to automatically match the parameters, further facilitating the automatic control of the moving distance of the upper and lower dies, reducing the occurrence of human error phenomena, and improving the bending accuracy of the sheet material.

[0006] In the above technical solution, further, the positioning mechanism further includes: Support frame, the support frame is arranged on the machine body and is located at the rear side of the lower die; Among them, the sliding block is slidably combined with the support frame in the lateral direction of the lower die mounting table, and the moving distance of the sliding block can be controlled by the control system.

[0007] In the above technical solution, further, the hydraulic system further includes: Oil pipe connector, the oil pipe connector is arranged at the connection end of the oil pipe for connecting adjacent oil pipes; Among them, the oil pipe connector can cooperate with the oil pipe to form multiple seals.

[0008] In the above technical solution, further, the oil pipe connector further includes: Main connector, the main connector has a slot for inserting the end of the oil pipe and an insertion pipe inserted into the oil pipe. The slot has a sealing portion that can form a sealing fit with the end face of the oil pipe; Pipe clamp, the pipe clamp is clamped on the part of the oil pipe inserted by the insertion pipe; Reinforcement sleeve, the reinforcement sleeve is formed by two half cylinders wrapping around the outside of the main connector. The inner wall of the reinforcement sleeve has a convex ring that can close the slot and press the oil pipe. The end of the reinforcement sleeve has a self-tightening ring; Among them, the self-tightening ring presses the oil pipe against the insertion pipe to prevent the oil pipe from loosening when the oil pipe loosens through a wedge structure.

[0009] In the above technical solution, further, the upper die unit further includes: Connecting platen, the connecting platen is fixedly arranged at the bottom of the upper die mounting table, and a plurality of jacks for installing and connecting the upper die pressing blocks are provided on the connecting platen; Fixing part, the fixing part is located in the jack and is fixedly connected to the upper die mounting table, and the fixing part includes a plurality of grippers driven to move hydraulically; Connecting column, the connecting column is arranged at the top of the upper die pressing block, and a connecting block matched with a plurality of grippers is arranged at the top end of the connecting column; Wherein, after the connecting column is inserted into the jack, the upper die pressing block is fixed on the upper die mounting table by clamping the connecting block with a plurality of grippers.

[0010] In the above technical solution, further, it further includes: Slow release part, the slow release part includes a pressure wheel and a damping part drivingly connected to the pressure wheel unidirectionally; Wherein, after the gripper releases the connecting block, the connecting column can drive the pressure wheel to rotate and transmit the force to the slow release part, and the slow release part can reversely control the rotation speed of the pressure wheel through the gas micropore damping to make the connecting column descend slowly.

[0011] In the above technical solution, further, the fixing part further includes: Mounting seat, the mounting seat is provided with a hydraulic driving part, and a central plate is arranged below the mounting seat; Linkage mechanism, a plurality of the connecting mechanisms are arranged corresponding to the grippers and are evenly spaced along the circumferential direction of the central plate; Wherein, the central plate can move up and down under the drive of the hydraulic driving part, the gripper is drivingly connected to the connecting mechanism, the central plate can drive the connecting mechanism to move during the up and down movement, and the gripper expands or contracts along with the movement of the linkage mechanism.

[0012] In the above technical solution, further, the connecting block further includes: Fixing grooves, a plurality of fixing grooves are provided and are evenly spaced along the circumferential direction of the connecting block on the side wall of the connecting block, and the fixing grooves are triangular with a wide bottom and a narrow top.

[0013] In the above technical solution, further, the damping part further includes: Damping disc, an arc-shaped piston cavity concentric with the damping disc is provided in the damping disc; Piston body, the piston body is arranged in the arc-shaped piston cavity; Piston rod, the piston rod is rotatably installed in the damping disc; Wherein, the piston rod drives the piston body to move in the piston cavity along with the rotation of the pressure wheel through a shaft drivingly connected to the pressure wheel, the piston cavity is communicated with the external environment through the gas damping micropores, and the piston body can automatically reset after moving.

[0014] In the above technical solution, further, the present invention also discloses a usage method applicable to the above automatic sheet metal bending machine, including the following steps: S1 Parameter setting, before bending the sheet metal, according to the sheet metal bending requirements and the specifications of the upper and lower die units, input the corresponding parameters through the control center; S2 Sheet metal insertion, insert the sheet metal into the lower die unit, and the sliding block of the positioning mechanism blocks the insertion end of the sheet metal after the sheet metal is inserted to control the insertion depth of the sheet metal; S3 Sheet metal bending, start the hydraulic pump in the hydraulic system, the hydraulic pump drives the hydraulic cylinder to work, the upper die mounting table descends driven by the hydraulic cylinder, so that the upper die pressing block on the upper die unit approaches the lower die pressing block on the lower die unit, and finally the sheet metal is bent and processed; S4 Replacement of the upper die pressing block, control the hydraulic action of the fixing part to make the gripper release the connecting block, the connecting column descends under the action of the gravity of the upper die pressing block after the connecting block is released, the release part controls the release speed of the connecting column through the overpressure wheel, then replace the released upper die pressing block, insert the connecting column of the replaced upper die pressing block into the jack, and finally the gripper of the fixing part grasps the connecting block on the connecting column to complete the fixing of the upper die pressing block.

[0015] In this technical solution, during the processing of the automatic sheet metal bending machine, the positioning of the sheet metal and the automation degree of the moving distance of the upper and lower dies are high, effectively improving the bending accuracy of the sheet metal. At the same time, when replacing the upper die pressing blocks of different specifications and sizes, the replacement steps are simple, effectively improving the work efficiency.

[0016] The beneficial effects of the present invention are: 1. By matching the positioning mechanism and the serial number with the built-in stamping parameters of the control center, the automation degree of the sheet metal bending machine can be effectively improved, reducing the error of manual operation and improving the bending accuracy of the sheet metal.

[0017] 2. Through the setting of the oil pipe connector, the stability of the hydraulic system can be improved, reducing the phenomenon of oil leakage at the oil connection, ensuring the pressure stability of the hydraulic system, and preventing the phenomenon of accuracy decline due to hydraulic pressure fluctuation during the sheet metal bending operation.

[0018] 3. Through the cooperation of the fixing part and the connector, the upper die pressing block can be quickly replaced and installed, effectively improving the work efficiency, and at the same time, the fixing effect of the fixing part on the upper die pressing block is good.

[0019] 4. Through the setting of the release part, when the upper die pressing block is released during the replacement process, it will not fall directly but be released slowly, which is convenient for the staff to perform the replacement operation alone and further improves the work efficiency. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Structural schematic diagram of the specific embodiment of the present invention.

[0022] Figure 2 Structural schematic diagram of the positioning mechanism of the present invention.

[0023] Figure 3 Structural schematic diagram of the cross-sectional view of the oil pipe connector of the present invention.

[0024] Figure 4 Structural schematic diagram of the oil pipe connector of the present invention.

[0025] Figure 5 Structural schematic diagram of the self-tightening ring of the present invention.

[0026] Figure 6 Structural schematic diagram of the upper die unit of the present invention.

[0027] Figure 7 Structural schematic diagram of the cooperation state of the connecting block and the gripper of the present invention.

[0028] Figure 8 Structural schematic diagram of the fixing part of the present invention.

[0029] Figure 9 Structural schematic diagram of the link mechanism of the present invention.

[0030] Figure 10 Structural schematic diagram of the slow-release part of the present invention.

[0031] Figure 11 Structural schematic diagram of the damping part of the present invention.

[0032] The marks in the figure are shown as: 1. Body; 2. Lower die mounting table; 3. Upper die mounting table; 4. Hydraulic pump; 5. Hydraulic cylinder; 6. Control center; 7. Positioning mechanism; 70. Sliding block; 71. Support frame; 8. Upper die unit; 80. Upper die pressing block; 81. Connecting platen; 82. Jack; 83. Fixed part; 830. Gripper; 831. Mounting seat; 832. Hydraulic drive; 833. Center plate; 834. Linkage mechanism; 8340. First link seat; 8341. Second link seat; 8342. First link; 8343. Second link; 8344. Third link; 8345. Fourth link; 84. Connecting column; 85. Connecting block; 850. Fixed groove; 9. Lower die unit; 90. Lower die pressing block; 10. Oil pipe connector; 100. Main connector; 101. Slot; 102. Insert pipe; 103. Sealing part; 104. Pipe clamp; 105. Reinforcing sleeve; 106. Convex ring; 107. Self-tightening ring; 108. Wedge groove; 109. Wedge block; 11. Slow-release part; 110. Pressing wheel; 112. Damping part; 1120. Damping disc; 1121. Arc piston cavity; 1122. Piston body; 1123. Piston rod; 12. Guide rod; 13. Axle seat; 14. Wheel axle; 15. Intermediate shaft; 16. End shaft; 17. Elastic part. Detailed implementation mode

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0034] In the description of this application, it should be noted that the terms used here are only for describing specific implementation modes, and are not intended to limit the exemplary implementation modes according to this application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but under appropriate circumstances, the said technologies, methods and devices should be regarded as a part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as only exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0035] Embodiment 1: An embodiment of the present application provides an automatic sheet metal bending machine, including: a machine body 1, with a lower die mounting table 2 provided on the front side of the machine body 1; an upper die mounting table 3, which is arranged on the machine body 1 and is located above the lower die mounting table 2, and the upper die mounting table 3 can move up and down in the vertical direction; a hydraulic system, which includes a hydraulic pump 4 and a hydraulic cylinder 5 connected by an oil pipe; a control system, which includes a control center 6 arranged on the machine body 1; It further includes: a positioning mechanism 7, which is arranged on the machine body 1 and is located at the rear side of the lower die, and the positioning mechanism 7 includes a sliding block 70 that can control the insertion depth of the sheet metal; an upper die unit 8, which includes a plurality of upper die pressing blocks 80 detachably arranged on the upper die mounting table 3; a lower die unit 9, which includes a plurality of lower die pressing blocks 90 detachably arranged on the lower die mounting table 2; Among them, the upper die mounting table 3 is driven by the hydraulic cylinder 5 to move up and down in the vertical direction. Serial numbers composed of die block parameters are engraved on both the upper die pressing blocks 80 and the lower die pressing blocks 90. The control center 6 is internally provided with stamping parameters matching the serial numbers. The control center 6 automatically matches the parameters by inputting the serial numbers of the upper die pressing blocks 80 and the lower die pressing blocks 90 to achieve automatic control of the upper die pressing blocks 80 and the lower die pressing blocks 90.

[0036] The positioning mechanism 7 further includes: a support frame 71, which is arranged on the machine body 1 and is located at the rear side of the lower die; Among them, the sliding block 70 is slidably coupled to the support frame 71 in the lateral direction of the lower die mounting table 2, and the moving distance of the sliding block 70 can be controlled by the control system.

[0037] Moreover, the machine body 1 has a conventional structure and is vertically arranged on the bottom surface of the production site. Grooves are formed in the lower die pressing blocks 90. The grooves are located in the upper part of the lower die pressing blocks 90 and have a certain depth to form bending grooves for bending the sheet metal. A plurality of lower die pressing blocks 90 are arranged in a row along the longitudinal direction of the lower die mounting table, that is, the left - right direction of the machine body 1. The number of lower die pressing blocks 90 can be adjusted according to the size of the sheet metal. The serial numbers engraved on the lower die pressing blocks 90 are composed of parameters such as groove angles and chamfer radii of the groove inlet corners; The lower die pressing blocks 90 and the lower die mounting table 2 can be detachably connected by a conventional quick - release method. Preferably, a plurality of installation grooves are longitudinally formed at the top of the lower die mounting table. The installation grooves are quadrilateral. The bottom of the lower die pressing block 90 has installation blocks corresponding to the installation grooves. The fit between the installation blocks and the installation grooves is a precision fit with a tolerance grade of IT2 - IT5. There are pin holes that horizontally penetrate the lower die mounting table 2 and the installation grooves on the side wall of the lower die mounting table 2. Similarly, there are corresponding pin holes on the installation blocks, and there are also pin shafts that cooperate with the pin holes.

[0038] The end of the upper die pressing block 80 has a conventional angled shape, and the serial number engraved on the upper die pressing block 80 is composed of parameters such as the bending angle at its end and the bottom forming angle.

[0039] The hydraulic system also has conventional control valves such as solenoid valves, as well as auxiliary components such as an oil tank and an oil filter. Conventionally, there are two hydraulic cylinders 5, which are symmetrically arranged on both sides of the machine body 1 in the left - right direction of the machine body 1. The hydraulic cylinders 5 are fixedly connected to the machine body 1 by conventional bolts. The hydraulic cylinders 5 are driven by a hydraulic pump 4. The upper die mounting table 3 is movably connected to the machine body 1 in a conventional manner, such as by a moving rod guide rail slider. The driving end of the hydraulic cylinder 5 is vertically downward and connected to the upper die mounting table 3. The hydraulic cylinder 5 applies hydraulic pressure through the hydraulic pump 4 to extend the driving end so as to drive the lifting of the upper die mounting table 3.

[0040] The control system is a conventional control system. There are multiple buttons on the control center 6 for inputting working parameters, such as including direction control buttons, digital buttons, mode buttons, and start - stop buttons. The control system can be a conventional CNC device.

[0041] The support frame 71 has a certain protruding height. The sliding block 70 can move along the insertion direction of the sheet metal. The end of the sliding block 70 can contact and block the sheet metal. The insertion depth of the sheet metal can be preset at the control center 6. The sliding block 70 moves according to the preset parameters. The sliding block 70 and the support frame 71 can be connected by a conventional sliding connection method, such as arranging guide rails and sliders on the support frame 71 and the sliding block 70 respectively, and arranging a conventional linear drive unit on the support frame 71 connected to the sliding block 70.

[0042] In this technical solution, through the setting of the positioning mechanism 7, the insertion depth of the sheet metal can be effectively controlled, which is convenient for automatically positioning the sheet metal, improving the bending accuracy of the sheet metal. At the same time, using the serial number composed of the press block parameters, the staff can directly input the serial numbers of the upper die pressing block 80 and the lower die pressing block 90 at the control center 6 to automatically match the parameters, further facilitating the automatic control of the moving distance of the upper and lower dies, reducing the occurrence of human error phenomena, and improving the bending accuracy of the sheet metal.

[0043] Embodiment 2: This embodiment provides an automatic sheet metal bending machine. In addition to including the technical solutions of the above - mentioned embodiment, it also has the following technical features. The hydraulic system also includes: a tubing connector 10, which is arranged at the connection end of the tubing for connecting adjacent tubing; Among them, the tubing connector 10 can cooperate with the tubing to form multiple seals.

[0044] The tubing connector 10 further includes: a main connector 100, on which there is a slot 101 for inserting the end of the tubing and an inserting tube 102 inserted into the tubing, and a sealing portion 103 capable of forming a sealing fit with the end face of the tubing is provided in the slot 101; a pipe clamp 104, which is clamped on the part of the tubing inserted by the inserting tube 102; a reinforcing sleeve 105, which is formed by two half cylinders wrapping around the outside of the main connector 100, and a convex ring 106 capable of closing the slot 101 and pressing the tubing is provided on the inner wall of the reinforcing sleeve 105, and a self-tightening ring 107 is provided at the end of the reinforcing sleeve 105; Wherein, the self-tightening ring 107 presses the tubing against the inserting tube 102 to prevent the tubing from loosening through a wedge-shaped structure when the tubing loosens.

[0045] Moreover, the tubing connector 10 can be installed at all connection ends of the hydraulic system, such as the connection of the tubing between the output end of the hydraulic pump 4 and the input end of the hydraulic cylinder 5. The pipe clamp 104 is a conventional pipe clamp for tubing. The main connector 100 is tubular. The outer diameter of the inserting tube 102 matches the inner diameter of the tubing. There is a coaxial annular protruding part in the middle of the inserting tube 102. The annular protruding part protrudes outward from the inserting tube 102, and the outer diameter of the annular protruding part is larger than the outer diameter of the tubing. The slot 101 is formed by an annular groove formed on the end face of the annular protruding part. The annular groove is axially distributed, and the inner diameter and outer diameter of the annular groove respectively match the inner diameter and outer diameter of the tubing. The sealing portion 103 is also annular and arranged at the inner end of the annular groove. Both sides of the half cylinder have conventional connecting lugs. The two half cylinders are connected to each other through the connecting lugs and bolt-nut cooperation to form the reinforcing sleeve 105. The inner diameter of the half cylinder matches the outer diameter of the annular protruding part in the middle of the inserting tube 102. The convex ring 106 protrudes towards the inserting tube 102. There are two convex rings 106 and they are symmetrically distributed on both sides of the half cylinder. The distance between the two convex rings 106 matches the axial length of the annular protruding part. The inner diameter of the convex ring 106 is slightly larger than the outer diameter of the tubing to press the convex ring 106 against the surface of the inserting tube 102. Both ends of the half cylinder also have annular parts protruding towards the inserting tube 102, and an annular groove for installing the self-tightening ring 107 is provided on the inner circumferential surface of the annular part protruding from the end of the half cylinder. The annular groove is radially distributed, and a wedge-shaped groove 108 is arranged on the bottom surface of the annular groove. The wedge-shaped groove 108 is an annular groove with a wedge-shaped cross section. The self-tightening ring 107 has an annular main body, and the self-tightening ring 107 also cooperates with the two half cylinders of the reinforcing sleeve 105 and is also composed of two semi-annular shapes. A number of wedge blocks 109 are distributed circumferentially on the side surface of the main body of the self-tightening ring 107. The main body of the self-tightening ring 107 and the bottom of the wedge blocks 109 cooperate with the annular groove at the end of the half cylinder and are embedded in the annular groove, while the top of the wedge blocks 109 cooperates with the wedge-shaped groove 108.

[0046] In this embodiment, when connecting adjacent oil pipes, the end parts of the two oil pipes are respectively inserted into the insertion pipes 102 at both ends of the main connector 100, and the end parts of the oil pipes are inserted into the slot 101. After the end parts of the oil pipes are inserted into the slot 101, they are attached to the sealing part 103 to form an additional seal. Then, the oil pipes are tightly clamped on the insertion pipes 102 through the pipe clamp 104, and the main seal is formed by the tightening of the pipe clamp 104. After the cooperation between the oil pipe and the main connector 100 is completed, the reinforcement sleeve 105 is sleeved on the outside of the main connector 100 and the oil pipe. After the reinforcement sleeve 105 is fixed, the convex ring 106 further presses the oil pipe tightly on the insertion pipe 102 to form an additional seal. At the same time, the convex ring 106 closes the side surface of the slot 101, and the self-tightening ring 107 can closely adhere to the surface of the oil pipe after the reinforcement sleeve 105 is fixed. When the oil pipe loosens, the self-tightening ring 107 moves along with the loosening trend of the oil pipe. Due to the design of the wedge-shaped structure, the self-tightening ring 107 cooperates with the wedge-shaped groove 108 at the end of the half cylinder. The farther the self-tightening ring 107 moves outward, the greater the pressure generated on the surface of the oil pipe, so that the resistance that needs to be overcome when the oil pipe loosens becomes larger, and finally self-tightening is realized to prevent the oil pipe from loosening. Compared with the prior art, the present invention can form multiple pressing seals at the connection of the oil pipes, and the connection stability of the oil pipes is high, and it is not easy to loosen, reducing the phenomenon of pressure fluctuation in the hydraulic system and improving the precision of sheet metal bending.

[0047] Embodiment 3: This embodiment provides an automatic sheet metal bending machine. In addition to including the technical solutions of the above embodiments, it also has the following technical features. The upper die unit 8 further includes: a connecting base plate 81, which is fixedly arranged at the bottom of the upper die mounting table. A plurality of jacks 82 for installing and connecting the upper die pressing blocks 80 are provided on the connecting base plate 81; a fixing part 83, which is located in the jacks 82 and fixedly connected to the upper die mounting table. The fixing part 83 includes a plurality of grippers 830 that are driven to move hydraulically; a connecting column 84, which is arranged on the top of the upper die pressing block 80, and a connecting block 85 that cooperates with the plurality of grippers 830 is arranged at the top end of the connecting column 84; Among them, after the connecting column 84 is inserted into the jack 82, the upper die pressing block 80 is fixed on the upper die mounting table 3 by gripping the connecting block 85 through a plurality of grippers 830.

[0048] The fixing part 83 further includes: a mounting seat 831, on which a hydraulic driving member 832 is provided, and a central plate 833 is provided below the mounting seat 831; a link mechanism 834, and a plurality of connecting mechanisms corresponding to the grippers 830 are provided and are evenly spaced circumferentially along the central plate 833; Among them, the center plate 833 can be lifted and moved under the drive of the hydraulic drive component 832, the gripper 830 is connected to the connecting mechanism by transmission, the center plate 833 can drive the connecting mechanism to move during the lifting and moving process, and the gripper 830 can be expanded or tightened with the movement of the connecting rod mechanism 834.

[0049] The connection block 85 further includes: a plurality of fixing grooves 850 , which are evenly spaced and distributed on the side wall of the connection block 85 along the circumference of the connection block 85 . The fixing grooves 850 are in the shape of a triangle with a wide bottom and a narrow top.

[0050] Moreover, the connecting platform 81 is generally in the shape of a rectangular parallelepiped, and the connecting platform 81 is connected to the bottom of the upper mold mounting platform 3 by conventional bolts. A plurality of sockets 82 are evenly spaced along the longitudinal direction of the upper mold mounting platform 3, and the sockets 82 are located directly above the lower mold mounting platform 2. The sockets 82 can be cylindrical holes, and the connecting column 84 is cylindrical and matched with the sockets 82. The outer diameter of the connecting column 84 matches with the inner diameter of the socket 82. The connecting block 85 can be a part integrally formed with the connecting column 84, or the connecting block 85 can be a hollow block processed separately and fixedly matched with the top of the connecting column 84 by conventional bolts. The hydraulic drive of the fixing part 83 can be controlled by the hydraulic system and the control system.

[0051] Preferably, the gripper 830 has at least six grippers, the mounting seat 831 can be fixedly connected to the bottom surface of the upper mold mounting platform 3 by conventional bolts, the hydraulic drive member 832 can be a conventional hydraulic actuator such as a hydraulic cylinder 5, the connecting rod mechanism 834 includes a first connecting rod seat 8340 connected to the bottom surface of the mounting seat 831, a second connecting rod seat 8341 connected to the side wall of the center plate 833, and also includes a first, second, third and fourth connecting rods, the first connecting rod 8342 is in the shape of a straight rod and one end of which is hinged to the first connecting rod seat 8340, the second connecting rod 8343 is in a V-shape, and the other end of the first connecting rod 8342 is hinged to the second connecting rod 8343. The top is hinged, the bottom side rod body of the second connecting rod 8343 and the third connecting rod 8344 are parallel to each other, the fourth connecting rod 4345 and the top of the gripper 830 are parallel to each other, and a parallelogram connecting rod structure is formed between the bottom side rod body of the second connecting rod 8343, the third connecting rod 8344, the fourth connecting rod 4345 and the top of the gripper 830. The bottom end of the fourth connecting rod 4345 is fixedly connected to the second connecting rod seat 8341, and the bottom end of the mounting seat 831 preferably also has a plurality of guide rods 12, and the plurality of guide rods 12 are evenly distributed along the circumference of the driving end of the hydraulic drive member 832, and the center plate 833 and the guide rod 12 are slidably matched.

[0052] Preferably, the bottom of the mounting base 831 further has a cover body covering a plurality of link mechanisms 834. The cover body is fixedly connected to the mounting base 831. The bottom of the cover body has a bottom end cover. A plurality of slots for the bottom of the gripper 830 to pass through are formed in the bottom end cover. The bottom end cover can be detachably connected to the cover body by conventional bolts. A push-button trigger switch can also be installed at the center of the bottom end cover. The trigger switch is electrically connected to the control center 6.

[0053] Moreover, preferably, the connecting block 85 is frustum-shaped. The top width of the fixing groove 850 is matched with the size of the gripper 830. For example, if the gripper 830 is a plate-shaped one with a hook portion, the top width of the fixing groove 850 is matched with the thickness of the gripper 830.

[0054] In this embodiment, during the replacement and installation process of the upper die pressing block 80, the connecting column 84 is inserted into the insertion hole 82. Then, the fixing part 83 is controlled to operate. The hydraulic driving part 832 drives the center plate 833 to move and makes the link mechanism 834 move. A plurality of grippers 830 gradually contract and enter the fixing groove 850. Finally, the gripper 830 tightly grips the connecting block 85 through the fixing groove 850, thereby fixing the connecting column 84 in the insertion hole 82, realizing the installation and fixation of the upper die pressing block 80. Since the fixing groove 850 is triangular, when the staff replaces and installs the upper die pressing block 80, there is no need to spend energy and time making the upper die pressing block 80 completely parallel to the longitudinal direction of the upper die installation table. During the gradual contraction process of the gripper 830, it can cooperate with the triangular shape of the fixing groove 850 to automatically rotate the connecting block 85 to the aligned state, and then adjust the position of the upper die pressing block 80 to the aligned state, facilitating the replacement and installation of the upper die pressing block 80, improving the work efficiency. At the same time, a plurality of link mechanisms 834 are used to control a plurality of grippers 830 to install and fix the upper die pressing block 80, effectively improving the fixing stability of the upper die pressing block 80. After the upper die pressing block 80 is installed, it is not easy to loosen. Moreover, the response speed of the hydraulic driving part 832 to drive the gripper 830 to perform fixation and release through the link mechanism 834 is fast, thus improving the replacement and installation speed of the upper die pressing block 80.

[0055] Embodiment 4: This embodiment provides an automatic sheet metal bending machine. In addition to including the technical solutions of the above embodiments, it further has the following technical features. It further includes: a slow-release part 11. The slow-release part 11 includes a pressure wheel 110 and a damping part 112 that is unidirectionally drivingly connected to the pressure wheel 110. Among them, after the gripper 830 releases the connecting block 85, the connecting column 84 can drive the pressure wheel 110 to rotate and transmit the force to the slow-release part 11. The slow-release part 11 can reversely control the rotation speed of the pressure wheel 110 through gas micropore damping so that the connecting column 84 slowly descends.

[0056] The damping part 112 further includes: A damping disc 1120, wherein the damping disc 1120 has an arc-shaped piston cavity 1121 concentric with the damping disc 1120; a piston body 1122, wherein the piston body 1122 is disposed in the arc-shaped piston cavity 1121; and a piston rod 1123, wherein the piston rod 1123 is rotatably mounted in the damping disc 1120; Among them, the piston rod 1123 drives the piston body 1122 to move in the piston cavity through an axis connected to the pressure wheel 110 so as to rotate with the pressure wheel 110. The piston cavity is connected to the external environment through the gas damping micropores, and the piston body 1122 can automatically reset after moving.

[0057] Moreover, the slow-release portion 11 can be installed in the connecting platform 81 in a conventional manner, such as a cavity and a groove body are opened in the connecting platform 81, one end of the cavity is connected to the socket 82, and there are slide grooves on the inner walls of both sides of the cavity, and an axle seat 13 is slidably installed in the slide groove. The back side of the axle seat 13 (i.e., the side away from the socket 82) is supported by an elastic member 17, and the elastic member 17 is a conventional elastic telescopic rod. The pressure wheel 110 is connected to the axle seat 13 through the wheel axle 14, and the pressure wheel 110 is elastically provided by the elastic member 17. The force of the groove body abuts against the surface of the connecting column 84 inserted into the socket 82. One end of the groove body close to the front surface of the connecting platform body is open and is equipped with a removable door cover. The groove body has a removable shaft support seat and a damping plate 1120 mounting block. The intermediate shaft 15 is rotatably installed in the shaft support seat. The intermediate shaft 15 is connected to the wheel shaft 14 in a one-way transmission manner in a conventional manner, such as through a ratchet ratchet structure. The terminal shaft 16 is rotatably installed in the damping plate 1120 mounting block. The terminal shaft 16 is connected to the intermediate shaft 14 in a conventional keyway manner. The intermediate shaft 15 is connected in transmission, the damping disc 1120 also has a disc cover arranged on its side, the disc cover and the damping disc 1120 are sealed to seal the piston cavity, the end shaft 16 extends into the damping disc 1120 and is connected to the piston rod 1123, the piston rod 1123 is composed of an arc-shaped rod body at one end and a straight rod body at one end, one end of the straight rod body is connected to the end shaft 16, and the other end is connected to the arc-shaped rod body, the end of the arc-shaped rod body away from the straight rod body is connected to the piston body 1122, and the arc-shaped piston cavity 1121 A conventional arc spring is provided therein, one end of which is connected to the end of the piston cavity, and the other end is connected to the piston body 1122. A cavity for cooperating with the rotation of the piston rod 1123 is also provided in the damping disk 1120. Preferably, there are two arc-shaped piston cavities 1121 evenly arranged along the circumference of the damping disk 1120. The gas damping micropores can be arranged on the side, circumferential surface or disk cover of the damping disk 1120. No special limitation is made here. The gas damping micropores only need to connect the piston cavity with the external environment.

[0058] In this embodiment, during the replacement and disassembly of the upper die pressing block 80, the fixing part 83 is controlled to operate. The hydraulic driving part 832 drives the central plate 833 to move and enables the link mechanism 834 to move. A plurality of grippers 830 gradually unfold and leave the fixing groove 850, thereby releasing the connecting block 85. After the connecting block 85 is released, the connecting column 84 and the upper die pressing block 80 drop downward under the action of gravity. At this time, as the connecting column 84 moves, the pressure wheel 110 in contact with its surface rotates simultaneously. The pressure wheel 110 rotates and drives the piston rod 1123 to rotate around the axis in the damping disc 1120 through each shaft. The piston body 1122 moves in the piston cavity as the piston rod 1123 rotates and compresses the air in the piston cavity. The compressed air is slowly released outward through the gas damping micropores to generate gas micropore damping. The rotation speed of the pressure wheel 110 is reversely controlled through the gas micropore damping, thereby controlling the falling speed of the connecting rod, so that the upper die pressing block 80 can be slowly released after the installation and fixation are released, providing enough time for the staff to pick up the released upper die pressing block 80, facilitating the replacement and disassembly operation of the upper die pressing block 80 by a single person. After the upper die pressing block 80 is completely released, the connecting column 84 leaves the insertion block. At this time, the elastic force of the arc spring enables the piston rod 1123 to reset to cope with the next replacement and disassembly. When installing the upper die pressing block 80, since the pressure wheel 110 is connected to the damping member 112 in a one-way transmission manner, the connecting column 84 will not be affected by the damping member 112 during the insertion process. At the same time, compared with the traditional friction damping method, the slow-release structure adopted by the present invention can effectively avoid the influence of wear, and the slow-release effect is stable.

[0059] Embodiment 5: This embodiment provides an automatic sheet metal bending machine. In addition to including the technical solutions of the above embodiments, it also has the following technical features. The present invention also discloses a usage method applicable to the above automatic sheet metal bending machine, including the following steps: S1 Parameter setting. Before sheet metal bending, according to the sheet metal bending requirements and the specifications of the upper and lower die units, corresponding parameters are input through the control center 6. S2 Sheet metal insertion. Insert the sheet metal into the lower die unit 9. The sliding block 70 of the positioning mechanism 7 blocks the insertion end of the sheet metal after the sheet metal is inserted to control the insertion depth of the sheet metal. S3 Sheet metal bending. Start the hydraulic pump 4 in the hydraulic system. The hydraulic pump 4 drives the hydraulic cylinder 5 to work. The upper die mounting table 3 descends under the drive of the hydraulic cylinder 5, so that the upper die pressing block 80 on the upper die unit 8 approaches the lower die pressing block 90 on the lower die unit 9, and finally the sheet metal is bent and processed. Replace the upper die pressing block 80 on S4. Control the hydraulic action of the fixing part 83 to release the connecting block 85 by the gripper 830. After the connecting block 85 is released, the connecting column 84 descends under the action of the gravity of the upper die pressing block 80. The slow release part 11 controls the release speed of the connecting column 84 through the overpressure wheel 110. Then replace the released upper die pressing block 80. Insert the connecting column 84 of the replaced upper die pressing block 80 into the jack 82. Finally, the gripper 830 of the fixing part 83 grasps the connecting block 85 on the connecting column 84 to complete the fixing of the upper die pressing block 80.

[0060] In this embodiment, during the processing of the automatic sheet metal bending machine, the positioning of the sheet metal and the automation degree of the moving distance of the upper and lower dies are high, effectively improving the precision of sheet metal bending. At the same time, when replacing the upper die pressing blocks of different specifications and sizes, the replacement steps are simple, effectively improving the work efficiency.

[0061] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are only illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. An automatic sheet metal bending machine, comprising: A machine body (1), a lower die mounting table (2) is arranged on the front side of the machine body (1); An upper die mounting table (3), the upper die mounting table (3) is arranged on the machine body (1) and is located above the lower die mounting table (2), and the upper die mounting table (3) can move up and down in the vertical direction; A hydraulic system, the hydraulic system includes a hydraulic pump (4) and a hydraulic cylinder (5) connected by an oil pipe; A control system, the control system includes a control center (6) arranged on the machine body (1); Characterized in that it further includes: A positioning mechanism (7), the positioning mechanism (7) is arranged on the machine body (1) and is located at the rear side of the lower die, and the positioning mechanism (7) includes a sliding block (70) that can control the insertion depth of the sheet metal; An upper die unit (8), the upper die unit (8) includes a plurality of upper die pressing blocks (80) detachably arranged on the upper die mounting table (3); A lower die unit (9), the lower die unit (9) includes a plurality of lower die pressing blocks (90) detachably arranged on the lower die mounting table (2); Wherein, the upper die mounting table (3) is driven by the hydraulic cylinder (5) to move up and down in the vertical direction, serial numbers composed of die pressing block parameters are engraved on both the upper die pressing block (80) and the lower die pressing block (90), stamping parameters matching the serial numbers are built in the control center (6), and the control center (6) automatically matches the parameters by inputting the serial numbers of the upper die pressing block (80) and the lower die pressing block (90) to realize the automatic control of the upper die pressing block (80) and the lower die pressing block (90).

2. An automatic sheet metal bending machine according to claim 1, characterized in that, The positioning mechanism (7) further includes: A support frame (71), the support frame (71) is arranged on the machine body (1) and is located at the rear side of the lower die; Wherein, the sliding block (70) is slidably coupled to the support frame (71) in the lateral direction of the lower die mounting table (2), and the moving distance of the sliding block (70) can be controlled by the control system.

3. An automatic sheet metal bending machine according to claim 2, wherein, The hydraulic system further includes: An oil pipe connector (10), the oil pipe connector (10) is arranged at the connection end of the oil pipe for connecting adjacent oil pipes; Wherein, the oil pipe connector (10) can cooperate with the oil pipe to form multiple seals.

4. An automatic sheet metal bending machine according to claim 3, characterized in that, The oil pipe connector (10) further includes: A main connector (100), the main connector (100) has a slot (101) for the end of the oil pipe to be inserted and an insertion pipe (102) inserted into the oil pipe, and a sealing portion (103) capable of forming a sealing fit with the end face of the oil pipe is arranged in the slot (101); A pipe clamp (104), the pipe clamp (104) is clamped on the part of the oil pipe inserted by the insertion pipe (102); A reinforcing sleeve (105), the reinforcing sleeve (105) is formed by two half cylinders wrapping outside the main connector (100), a convex ring (106) capable of closing the slot (101) and pressing the oil pipe is arranged on the inner wall of the reinforcing sleeve (105), and a self-tightening ring (107) is arranged at the end of the reinforcing sleeve (105); Among them, the self-tightening ring (107) presses the oil pipe against the inserting pipe (102) through a wedge-shaped structure to prevent the oil pipe from loosening when the oil pipe becomes loose.

5. An automatic sheet metal bending machine according to claim 1, characterized in that, The upper die unit (8) further includes: A connecting platen (81) fixedly arranged at the bottom of the upper die mounting table. A plurality of insertion holes (82) for mounting and connecting the upper die pressing blocks (80) are formed in the connecting platen (81); A fixing part (83) located in the insertion holes (82) and fixedly connected to the upper die mounting table. The fixing part (83) includes a plurality of grippers (830) driven to move by hydraulic pressure; A connecting column (84) arranged at the top of the upper die pressing block (80). A connecting block (85) cooperating with the plurality of grippers (830) is arranged at the top end of the connecting column (84); Among them, after the connecting column (84) is inserted into the insertion hole (82), the upper die pressing block (80) is fixed to the upper die mounting table (3) by the plurality of grippers (830) gripping the connecting block (85).

6. The automatic sheet metal bending machine according to claim 5, characterized in that, It further includes: A slow-release part (11) including a pressure wheel (110) and a damping part (112) drivingly connected to the pressure wheel (110) unidirectionally; Among them, after the grippers (830) release the connecting block (85), the connecting column (84) can drive the pressure wheel (110) to rotate and transmit the force to the slow-release part (11). The slow-release part (11) can reversely control the rotation speed of the pressure wheel (110) through gas micropore damping so that the connecting column (84) descends slowly.

7. An automatic sheet bending machine according to claim 5, wherein, The fixing part (83) further includes: A mounting seat (831) having a hydraulic driving member (832) thereon. A central plate (833) is arranged below the mounting seat (831); A link mechanism (834) corresponding to the grippers (830) and arranged at a plurality of positions and evenly spaced circumferentially along the central plate (833); Among them, the central plate (833) can move up and down driven by the hydraulic driving member (832). The grippers (830) are drivingly connected to the link mechanism. The central plate (833) can drive the link mechanism to move during the up and down movement. The grippers (830) expand or contract along with the movement of the link mechanism (834).

8. An automatic sheet metal bending machine according to claim 7, characterized in that, The connecting block (85) further includes: Fixing grooves (850) which are a plurality of and evenly spaced circumferentially along the side wall of the connecting block (85). The fixing grooves (850) are triangular with a wider bottom and a narrower top.

9. An automatic sheet metal bending machine according to claim 6, characterized in that, The damping part (112) further includes: A damping disc (1120) having an arc-shaped piston cavity (1121) concentric with the damping disc (1120) therein; A piston body (1122) arranged in the arc-shaped piston cavity (1121); A piston rod (1123) rotatably mounted in the damping disc (1120); Wherein, the piston rod (1123) is driven to rotate by a shaft that is in transmission connection with the pressure wheel (110), so as to drive the piston body (1122) to move in the piston cavity. The piston cavity is communicated with the external environment through gas damping micropores, and the piston body (1122) can automatically reset after moving.

10. A method for using the automatic sheet bending machine according to claim 9, characterized in that, It includes the following steps: S1 Parameter setting: Before bending the sheet metal, according to the sheet metal bending requirements and the specifications of the upper and lower die units, input corresponding parameters through the control center (6). S2 Sheet metal insertion: Insert the sheet metal into the lower die unit (9). After the sheet metal is inserted, the sliding block (70) of the positioning mechanism (7) blocks the insertion end of the sheet metal to control the insertion depth of the sheet metal. S3 Sheet metal bending: Start the hydraulic pump (4) in the hydraulic system. The hydraulic pump (4) drives the hydraulic cylinder (5) to work. The upper die mounting table (3) descends under the drive of the hydraulic cylinder (5), so that the upper die pressing block (80) on the upper die unit (8) approaches the lower die pressing block (90) on the lower die unit (9), and finally bends the sheet metal. S4 Replacement of the upper die pressing block (80): Control the hydraulic action of the fixing part (83) to make the gripper (830) release the connecting block (85). After the connecting block (85) is released, the connecting column (84) descends under the action of the gravity of the upper die pressing block (80). The slow release part (11) controls the release speed of the connecting column (84) through the pressure wheel (110). Then replace the released upper die pressing block (80), insert the connecting column (84) of the replaced upper die pressing block (80) into the jack (82), and finally the gripper (830) of the fixing part (83) grabs the connecting block (85) on the connecting column (84) to complete the fixing of the upper die pressing block (80).

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