Conveying lever, stamping production line and working method of stamping production line

Abstract

The invention belongs to the technical field of part machining, and discloses a conveying lever, a stamping production line and a working method of the stamping production line. An installation cavity is formed in the lever body, air cylinders are installed on the two sides of the symmetric center in the installation cavity in the length direction of the lever body, the air cylinders push telescopic rods to move along the axes of the telescopic rods, a support is installed on the telescopic rods, a pickup device is installed on the support, a suction cup is installed on the pickup device, and the suction cup is adsorbed to a stamped part. The air cylinders, the supports and the pickers are in one-to-one correspondence, the suction cups are communicated with an air source, and the suction cups can be switched between negative pressure and positive pressure; the problems that in the prior art, in order to improve the material utilization rate or shorten the die size, two stamping products synchronously prepared through a double-groove die process or a butt-joint process are too close to each other and cannot meet the stamping die space of a certain procedure or enter a framing operation module; and the two stamping products are too close to each other, so that the mechanical arms interfere with each other during framing operation.

Description

Technical Field

[0001] The present invention relates to the technical field of part processing, and in particular to a transfer bar, a stamping production line and a working method of the stamping production line. Background Art

[0002] In the process planning of double-slot stamping dies or double-piece splicing (which can be simply referred to as double-splicing) stamping dies in automotive panel stamping dies, the manufacturing of a formed workpiece from a metal sheet requires multiple processes in a production line. The metal sheet needs to go through multiple continuous forming steps such as stretching, bending, punching, and trimming in a press, and finally obtain the required shape. The die usually includes an upper die and a corresponding lower die, and the dies move relative to each other to stretch and form the workpiece placed between the upper and lower dies. Since the forming of a workpiece needs to be completed through multiple continuous forming processes of multiple dies, a plurality of presses need to be continuously arranged to form a stamping production line, that is, a series-connected press is used.

[0003] In the prior art, if the distance between the left door and the right door is shortened in order to reduce production costs, and the doors are stamped and output to the end of the production line, it will cause interference between the manipulators for moving the left door and the right door, and the doors cannot be moved to the corresponding next process. Summary of the Invention

[0004] The purpose of the present invention is to provide a transfer bar, a stamping production line and a working method of the stamping production line, so as to solve the problem that in the prior art, when using the double-slot die process or the butt joint process to synchronously prepare stamping products, in order to improve the material utilization rate or shorten the die size, the two stamping products are too close to meet the space of the stamping die in a certain process or enter the framing operation module, and when the manipulator performs the framing operation due to the two stamping products being too close, they interfere with each other.

[0005] To achieve this purpose, the present invention adopts the following technical solutions: The present invention provides a transfer bar, including a bar body. An installation cavity is formed in the bar body. Cylinders are installed on both sides of the symmetric center along the length direction of the bar body in the installation cavity. The cylinders push the telescopic rods to move along their own axes. A bracket is installed on the telescopic rods, a pick-up device is installed on the bracket, a suction cup is installed on the pick-up device, and the suction cup adsorbs on the stamped parts. The cylinders, the brackets and the pick-up devices are in one-to-one correspondence. The suction cup is communicated with a gas source, and the suction cup can be switched between negative pressure and positive pressure. A slide rail is installed in the bar body, a slider is installed on the bracket, and the slider moves in the slide rail.

[0006] Preferably, the lever body is a rectangular frame body. Along the length direction of the lever body, two groups of mutually parallel first flat plates are installed. The first flat plates are attached to two opposite surfaces of the rectangular frame body. The first flat plates are provided with first openings, and the picker slides within the first openings. One of the groups of first flat plates is provided with weight-reducing holes, and the other group of first flat plates is installed with grid beams.

[0007] Preferably, a fixing block and side plates are installed on the bracket. The side plates are installed on both sides of the fixing block to enclose an installation groove. The picker includes a plugging rod, and the sucker is installed on the plugging rod. The plugging rod is plugged into the installation groove. A top contact member is installed on one side of the installation groove. The top contact member is rotatably installed on the side plate, and the top contact member abuts against the plugging rod.

[0008] Preferably, the top contact member includes a rotating rod, a pushing block, a butting block, a first connecting bolt, and a second connecting bolt. The pushing block and the butting block are connected by the second connecting bolt. The side plate is provided with a first sliding groove, and the butting block is plugged into the first sliding groove. The rotating rod is provided with a second sliding groove, and the first connecting bolt passes through the second sliding groove. One end of the first connecting bolt is screwed into the pushing block, and the other end is screwed with a limiting block, and the limiting block abuts against the rotating rod.

[0009] Preferably, two groups of mutually parallel second flat plates are also installed along the length direction of the lever body. The second flat plates are attached to two opposite surfaces of the rectangular frame body. One of the groups of second flat plates is integrally formed with the lever body, and the other group of second flat plates is installed on the lever body through fasteners. The second flat plates are provided with grooves, and carbon fibers are installed in the grooves.

[0010] Preferably, mechanical connection blocks are installed at both ends of the lever body in the length direction, and gaskets are installed between the mechanical connection blocks and the lever body.

[0011] Preferably, the mechanical connection block is provided with a first through hole and a second through hole. An air inlet pipe is installed in the first through hole, and an exhaust pipe is installed in the second through hole. Both the air inlet pipe and the exhaust pipe are communicated with the cylinder.

[0012] Preferably, the lever body is made of aluminum alloy.

[0013] A stamping production line includes the above-mentioned conveying bar, and also includes a first station and a second station. The first station can stamp out parts, and the second station can continue to process the parts or frame them. A first conveyor belt and a second conveyor belt are successively installed between the first station and the second station. The conveying bar is installed between the first station and the second station, and the conveying bar is installed between the mechanical arms on both sides. The length direction of the conveying bar is perpendicular to the part conveying direction. The mechanical arm drives the conveying bar to move, and the parts move along the first conveyor belt to the second conveyor belt.

[0014] A working method of a stamping production line includes the above-mentioned stamping production line, and also includes the following steps:

[0015] S1. The mechanical arm drives the conveying bar to move to the first conveyor belt near the first station, the suction cup switches to the negative pressure state, and adsorbs the parts on the first conveyor belt.

[0016] S2. During the process of the mechanical arm driving the conveying bar to lift, the air cylinder is started, and the expansion rods on both sides of the symmetry center drive the brackets to move away from each other, increasing the distance between the parts on both sides of the symmetry center.

[0017] S3. The mechanical arm drives the conveying bar to move to the upper side of the second conveyor belt. After the first position sensor confirms the part spacing, the mechanical arm is ready to descend.

[0018] S4. The mechanical arm descends to the upper side of the conveyor belt, the suction cup switches to the positive pressure state, and the parts fall on the second conveyor belt.

[0019] S5. The mechanical arm drives the moving conveyor belt to move towards the first conveyor belt direction, the air cylinder is started, and the brackets on both sides of the symmetry center move closer to each other.

[0020] S6. After the second position sensor confirms the spacing between the brackets, the mechanical arm continues to move to the upper side of the first conveyor belt, and repeats step S1.

[0021] Beneficial effects: By using a conveying bar on the first conveyor belt, multiple parts are sucked by the suction cups on the conveying bar. The air cylinder pushes the brackets to move, and the positions of the parts on both sides of the symmetry center change, and the distance between the parts becomes larger. After being placed on the second conveyor belt, during the subsequent processing of the second station, the parts will not interfere with each other. Description of the Drawings

[0022] Figure 1 It is the main drawing of the conveying bar of the present invention;

[0023] Figure 2 It is the enlarged drawing of the top connection member of the present invention;

[0024] Figure 3 It is the main drawing of the bracket of the present invention;

[0025] Figure 4 This is the cylinder installation diagram of the present invention.

[0026] In the figure: 1. Lever body; 2. Cylinder; 3. Telescopic rod; 4. Bracket; 5. Suction cup; 6. Insertion rod; 7. First flat plate; 8. First opening; 9. Weight reduction hole; 10. Grid beam; 11. Fixed block; 12. Side plate; 13. Rotating rod; 14. Pushing block; 15. Abutting block; 16. First connecting bolt; 17. Second connecting bolt; 18. Second flat plate; 19. Mechanical connecting block; 20. Gasket; 21. First through hole; 22. Second through hole; 23. Slide rail; 24. Slide block. Detailed implementation manners

[0027] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that, for the sake of convenience of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0028] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the", and "on the" second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below the", and "under the" second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] To solve the above problems, as Figures 1 to 4 shown, the present invention provides a transfer bar, which includes a bar body 1. An installation cavity is formed in the bar body 1. On both sides of the symmetric center along the length direction of the bar body 1 in the installation cavity, cylinders 2 are installed. The cylinders 2 push the telescopic rods 3 to move along their own axes. A bracket 4 is installed on the telescopic rods 3, a pick-up device is installed on the bracket 4, and a suction cup 5 is installed on the pick-up device. The suction cup 5 adsorbs on the punched parts. The cylinders 2, the brackets 4 and the pick-up devices are in one-to-one correspondence. The suction cup 5 is communicated with a gas source, and the suction cup 5 can switch between negative pressure and positive pressure.

[0032] Multiple groups of cylinders 2 can be installed on the bar body 1 of the transfer bar of the present invention. In the present invention, two groups of cylinders 2 are installed, which are respectively installed on both sides of the symmetry axis. The telescopic rods 3 on both sides of the symmetry axis also move in a symmetric form. The telescopic rods 3 can move towards each other or away from each other, so that the parts on the pick-up device can be separated. After the parts increase the distance in the length direction of the bar body 1, they can be transported to the part frame or the next process by a manipulator. The manipulators corresponding to different parts will not interfere with each other. At the same time, during the mold manufacturing process, the positions of the parts on the mold can be infinitely close, reducing the blank area on the plate, improving the use efficiency of the plate, and reducing the production cost. A slide rail 23 is installed in the bar body 1, and a slider 24 is installed on the bracket 4. The slider 24 moves in the slide rail 23.

[0033] The bar body 1 of the present invention is a rectangular frame body, and the rectangular frame body has stronger tensile and bending resistance and can bear the load of larger parts. Two groups of mutually parallel first flat plates 7 are arranged in the length direction of the bar body 1. A first opening 8 is formed in the first flat plate 7. The pick-up device slides in the first opening 8. A weight-reducing hole 9 is formed in one side of the first flat plate 7, and a grid beam 10 is installed on the other side of the first flat plate 7. In the area of the first flat plate 7 except the first opening 8, weight-reducing holes 9 are formed. However, if the number of weight-reducing holes 9 is too large, the structural strength will be reduced. Usually, a grid beam 10 with horizontal and vertical intersections is additionally installed in the notch area of the first flat plate 7 to strengthen the stiffness of the transfer bar. Four groups of first openings 8 are provided in the present invention, and a pick-up device is installed in each group of first openings 8, increasing the contact points with the parts, making the parts more stable during the handling process and avoiding dropping.

[0034] A fixing block 11 and a side plate 12 are installed on the bracket 4. The side plate 12 is installed on both sides of the fixing block 11 to enclose an installation groove. The pick-up device includes a plugging rod 6. A suction cup 5 is installed on the plugging rod 6. The plugging rod 6 is plugged in the installation groove. A top contact member is installed on one side of the installation groove. The top contact member is rotatably installed on the side plate 12, and the top contact member abuts against the plugging rod 6.

[0035] On each of the first flat plates 7 on the opposite sides of the bar body 1, four groups of mounting grooves are formed. Different structural parts can be fixed through the above eight groups of mounting grooves. In each first opening 8, there is a mounting groove formed by the side plate 12 and the fixing block 11. At the same time, an air pipe is wound around the insertion rod 6, and the air pipe connects the air source and the suction cup 5, enabling the suction cup 5 to switch between positive pressure and negative pressure. At the same time, the air pipe can pass through the fixing block 11, making the distribution of the air pipe neater. The air pipe is arranged in the installation cavity to avoid interference with other parts. A top connection member is provided to facilitate the disassembly of the insertion rod 6, and the suction cup 5 can be inserted at different positions according to different parts.

[0036] The top connection member of the present invention includes a rotating rod 13, a pushing block 14, a abutting block 15, a first connecting bolt 16 and a second connecting bolt 17. The pushing block 14 and the abutting block 15 are connected by the second connecting bolt 17. A first sliding groove is formed on the side plate 12, and the abutting block 15 is inserted into the first sliding groove. A second sliding groove is formed on the rotating rod 13, and the first connecting bolt 16 is inserted into the second sliding groove. One end of the first connecting bolt 16 is screwed into the pushing block 14 and the other end is screwed into the limiting block, and the limiting block abuts against the rotating rod 13.

[0037] The rotating rod 13 rotates around the rotating shaft on the side plate 12. When the rotating rod 13 rotates away from the side plate 12, the pushing block 14 on the first connecting bolt 16 can be pulled out. The pushing block 14 can pull out the abutting block 15 through the second connecting bolt 17, so that the insertion rod 6 can be inserted inside. Then, the rotating rod 13 is rotated in the reverse direction, so that the abutting block 15 moves in the reverse direction and abuts against the insertion rod 6, realizing the locking of the insertion rod 6, and finally completing the fixation of the suction cup 5.

[0038] Along the length direction of the bar body 1, two groups of parallel second flat plates 18 are also provided. One group of second flat plates 18 is integrally formed with the bar body 1, and the other group of second flat plates 18 is installed on the bar body 1 through fasteners. Grooves are formed on the second flat plates 18, and carbon fibers are installed in the grooves. Carbon fibers are installed in parallel on the other two sides of the bar body 1. The carbon fiber plates can greatly increase the vibration damping of the cross bar and reduce the vibration of the bar body 1.

[0039] Mechanical connection blocks 19 are installed at both ends of the bar body 1 in the length direction. A gasket 20 is installed between the mechanical connection block 19 and the bar body 1. By setting the gasket 20, the installation position of the mechanical connection block 19 can be adjusted. At the same time, different forms of mechanical connection blocks 19 can also be installed on the bar body 1 to prepare for connection with different forms of robotic arms. Plugging holes are formed on the mechanical connection blocks 19. After the robotic arm is plugged into the plugging holes, it can drive the vertical height direction of the transfer bar perpendicular to the horizontal plane and the horizontal direction of the conveyor belt to move freely.

[0040] The mechanical connection block 19 is provided with a first through hole 21 and a second through hole 22. An intake pipe is installed in the first through hole 21, and an exhaust pipe is installed in the second through hole 22. Both the intake pipe and the exhaust pipe are connected to the cylinder 2, so as to prevent the intake pipe and the exhaust from interfering with the parts on the lower side.

[0041] The lever body 1 is made of aluminum alloy. The high-strength aluminum alloy is mainly used to achieve high bending resistance under low weight. In comparison, under the conditions of the same mass and the same structure, the section modulus of aluminum alloy is about 3 times that of steel, and it has higher bending resistance.

[0042] The stamping production line of the present invention mainly includes a first station and a second station. The first station is usually a stamping device that can stamp out parts. The second station can continue to process the parts or load them into a frame through a manipulator. A first conveyor belt and a second conveyor belt are successively installed between the first station and the second station. A transfer lever is installed between the first station and the second station. The transfer lever is installed between the mechanical arms on both sides. The length direction of the transfer lever is perpendicular to the part conveying direction. The mechanical arm drives the transfer lever to move, and the parts move along the first conveyor belt to the second conveyor belt and move between the first station and the second station.

[0043] The second conveyor belt diverts different parts on a single mold and conveys them to one side of the corresponding part frame, and places them through a manipulator. The parts can be vertically moved along the conveying direction of the conveyor belt through the transfer lever, increasing the gap between the parts and preventing interference between the manipulators, so that the mold can be designed more compactly and the utilization rate of the metal sheet is higher.

[0044] A working method of a stamping production line includes the following steps:

[0045] S1, the mechanical arm drives the transfer lever to move to the first conveyor belt near the first station, the suction cup 5 switches to the negative pressure state, and adsorbs the parts on the first conveyor belt;

[0046] S2, when the mechanical arm drives the transfer lever to lift, the cylinder 2 is started, and the telescopic rods 3 on both sides of the symmetry center drive the brackets 4 to move away from each other, increasing the distance between the parts on both sides of the symmetry center;

[0047] S3, the mechanical arm drives the transfer lever to move to the upper side of the second conveyor belt. After the first position sensor confirms the part spacing, the mechanical arm is ready to descend;

[0048] S4, the mechanical arm descends to the upper side of the conveyor belt, the suction cup 5 switches to the positive pressure state, and the parts fall on the second conveyor belt;

[0049] S5, the mechanical arm drives the moving conveyor belt to move towards the first conveyor belt direction, the cylinder 2 is started, and the brackets 4 on both sides of the symmetry center approach each other;

[0050] After the second position sensor confirms the distance between the brackets 4 at S6, the robotic arm continues to move to the upper side of the first conveyor belt and repeats step S1.

[0051] Among them, the first position sensor can detect the distance between the parts on the conveyor bar. If it is qualified, the robotic arm will drive the conveyor bar to continue moving. If it is unqualified, the production line will stop. Similarly, the second position sensor will also detect whether the distance between the brackets 4 has been recovered to the normal distance. If it is qualified, the conveyor bar will continue to move. If it is unqualified, the production line will stop. A mutual inductance sensor is also installed on the cylinder 2, which can detect the extended distance of the telescopic rod 3 and feedback it to the PLC control system of the stamping production line.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A transmission rod, characterized in that: The invention comprises a lever body (1), wherein an installation cavity is formed in the lever body (1), wherein cylinders (2) are installed on both sides of the symmetric center along the length direction of the lever body (1) in the installation cavity, wherein the cylinder (2) pushes the telescopic rod (3) to move along its own axis, wherein a bracket (4) is installed on the telescopic rod (3), wherein a pick-up device is installed on the bracket (4), wherein a suction cup (5) is installed on the pick-up device, wherein the suction cup (5) is adsorbed on the stamped part, wherein the cylinder (2), the bracket (4) and the pick-up device correspond to each other one by one, wherein the suction cup (5) is connected to an air source, wherein the suction cup (5) can switch between negative pressure and positive pressure, wherein a slide rail (23) is installed in the lever body (1), wherein a slider (24) is installed on the bracket (4), wherein the slider (24) moves in the slide rail (23).

2. The transmission bar according to claim 1, characterized in that: The lever body (1) is a rectangular frame, and two groups of mutually parallel first flat plates (7) are installed along the length direction of the lever body (1). The first flat plates (7) are attached to two opposite sides of the rectangular frame. The first flat plates (7) are provided with a first opening (8), and the pick-up slides in the first opening (8). One group of the first flat plates (7) is provided with a weight-reducing hole (9), and the other group of the first flat plates (7) is provided with a grid beam (10).

3. The transmission bar according to claim 2, characterized in that: The bracket (4) is provided with a fixing block (11) and a side plate (12), the side plate (12) being installed on both sides of the fixing block (11) to form a mounting groove, the picker comprises a plug-in rod (6), the plug-in rod (6) is provided with the suction cup (5), the plug-in rod (6) is plugged into the mounting groove, a top-connecting member is installed on one side of the mounting groove, the top-connecting member is rotatably installed on the side plate (12), and the top-connecting member abuts against the plug-in rod (6).

4. The transmission bar according to claim 3, characterized in that: The top connection component comprises a rotating rod (13), a pushing block (14), an abutting block (15), a first connecting bolt (16) and a second connecting bolt (17); the pushing block (14) and the abutting block (15) are connected via the second connecting bolt (17); a first sliding groove is provided on the side plate (12); the abutting block (15) is inserted into the first sliding groove; a second sliding groove is provided on the rotating rod (13); the first connecting bolt (16) is passed through the second sliding groove; one end of the first connecting bolt (16) is screwed into the pushing block (14) and the other end is screwed into a limiting block; the limiting block abuts against the rotating rod (13).

5. The transmission bar according to claim 2, characterized in that: Two groups of second plates (18) parallel to each other are also installed along the length direction of the lever body (1). The second plates (18) are mounted on two opposite sides of the rectangular frame. One group of the second plates (18) is integrally formed with the lever body (1), and the other group of the second plates (18) is mounted on the lever body (1) via fasteners. The second plates (18) are provided with grooves, and carbon fibers are installed in the grooves.

6. The transmission bar according to claim 1, characterized in that: Mechanical connection blocks (19) are installed at both ends of the lever body (1) in the length direction, and a gasket (20) is installed between the mechanical connection block (19) and the lever body (1).

7. The transmission bar according to claim 6, characterized in that: The mechanical connection block (19) is provided with a first through hole (21) and a second through hole (22); an air intake pipe is installed in the first through hole (21) and an exhaust pipe is installed in the second through hole (22); both the air intake pipe and the exhaust pipe are connected to the cylinder (2).

8. The transmission bar according to claim 6, characterized in that: The lever body (1) is made of aluminum alloy.

9. A stamping production line, characterized in that: It includes the conveying bar as described in claim 1, and also includes a first workstation and a second workstation, the first workstation can punch out parts, the second workstation can continue to process parts or frame them, a first conveyor belt and a second conveyor belt are installed between the first workstation and the second workstation in sequence, the conveying bar is installed between the first workstation and the second workstation, the conveying bar is installed between the mechanical arms on both sides, the length direction of the conveying bar is perpendicular to the conveying direction of the parts, the mechanical arm drives the conveying bar to move, and the parts are moved along the first conveyor belt to the second conveyor belt.

10. A working method of a stamping production line, characterized in that: The stamping production line according to claim 9 further comprises The following steps are involved: S1, the robot arm drives the conveyor bar to move to the first conveyor belt near the first workstation, and the suction cup (5) switches to a negative pressure state to absorb the parts on the first conveyor belt; S2, when the robot arm drives the conveyor bar to lift, the cylinder (2) is started, and the telescopic rods (3) on both sides of the symmetry center drive the brackets (4) to move away from each other, so that the distance between the parts on both sides of the symmetry center increases; S3, the robot arm drives the conveyor bar to move to the upper side of the second conveyor belt. After the first position sensor confirms the part spacing, the robot arm prepares to descend; S4, the robot arm descends to the upper side of the conveyor belt, the suction cup (5) switches to a positive pressure state, and the parts fall onto the second conveyor belt; S5, the robot arm drives the moving conveyor belt to move in the direction of the first conveyor belt, the cylinder (2) is started, and the brackets (4) on both sides of the symmetrical center approach each other; S6, after the second position sensor confirms the spacing between the brackets (4), the robot arm continues to move to the upper side of the first conveyor belt and repeats step S1.

Images