Punching production line

Abstract

The utility model relates to the technical field of automobile part manufacturing, in particular to a punching production line, which is suitable for producing sewer cover bodies of new energy automobiles and comprises a material rolling frame, a leveling machine and a punching machine which are sequentially arranged, and an industrial robot is arranged beside the punching machine. A first induction frame is arranged between the coiling frame and the leveling machine; a second induction frame is arranged between the leveling machine and the punching machine; a feeding device is arranged on the side, close to the second induction frame, of the punching machine, and the positive feeding direction and the negative feeding direction of the feeding device can be switched. An oil spraying device is arranged between the feeding device and the punching machine; an end effector is arranged on the industrial robot; according to the utility model, double material waiting areas are established, so that coordinated material conveying is realized; the forward and reverse feeding directions of the feeding device can be switched, so that only one workpiece is arranged in the die during grabbing, and grabbing is facilitated; the grabbing device does not damage the surface of the workpiece and can adapt to workpieces of various different shapes; and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile part manufacturing, in particular to a stamping production line. Background Art

[0002] With the rapid development of the new energy vehicle industry, higher requirements are put forward for the manufacturing precision and efficiency of vehicle parts. As an important part of new energy vehicles, the quality of the sewer cover directly affects the performance and safety of the vehicle. The traditional production method of the sewer cover has problems such as low production efficiency, large labor demand, and unstable product quality. The inaccurate stamping size directly affects the subsequent product forming quality. Therefore, it is of great significance to develop a high-efficiency and accurate stamping production line for the sewer cover of new energy vehicles. Summary of the Invention

[0003] The purpose of the utility model is to provide a stamping production line, which can significantly improve the production efficiency and yield of the sewer cover of new energy vehicles and reduce the labor input.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0005] A stamping production line, which is applicable to the production of the sewer cover of new energy vehicles, is characterized in that: it includes a coil rack, a straightener and a punching press arranged in sequence, and an industrial robot is arranged beside the punching press;

[0006] A first induction rack is arranged between the coil rack and the straightener;

[0007] A second induction rack is arranged between the straightener and the punching press;

[0008] A feeding device is arranged on one side of the punching press close to the second induction rack, and the feeding direction of the feeding device can be switched between forward and reverse;

[0009] An oil injection device is arranged between the feeding device and the punching press;

[0010] An end effector is arranged on the industrial robot. The end effector includes a connecting plate. One end of the connecting plate is connected to the industrial robot, and the other end is connected with a vacuum sponge suction cup. A proximity sensor is arranged on the side of the vacuum sponge suction cup.

[0011] Furthermore, a progressive die is arranged in the punching press. The progressive die includes an upper die that can move up and down and a fixed lower die. A lower die extension support and positioning plate connected thereto is arranged beside the lower die.

[0012] Further, the first induction rack includes a horizontally arranged and conductive induction rod, which is supported by a bracket off the ground. Both ends of the induction rod are connected to vertical grooves provided on the bracket. The second induction rack has the same structure as the first induction rack. The induction rod in the first induction rack is connected to the control system in the coiler through a wire, and the induction rod in the second induction rack is connected to the control system in the flattening machine through a wire.

[0013] Further, a horizontally placed conveying roller is arranged in the feeding device, and a gap is left between the upper conveying roller and the lower conveying roller.

[0014] Further, the oil spraying device includes two spray nozzles connected to an oil supply pipeline. The two spray nozzles are arranged one above the other, and the two spray nozzles are connected to the oil supply pipeline through a universal joint corrugated pipe.

[0015] Further, the industrial robot is a six-axis robot.

[0016] Further, the upper surface of the connecting plate is connected to the sixth axis at the end of the industrial robot.

[0017] The beneficial effects of adopting the technical solution of the present utility model are as follows:

[0018] A stamping production line provided by the present utility model has precise stamping dimensions and high working efficiency. By setting up a double induction rack, separated double waiting material areas are established to achieve orderly and coordinated material transfer. The feeding direction of the feeding device can be switched between forward and reverse, and reverse feeding enables only one workpiece to be in the mold during grasping, facilitating grasping. The end effector of the industrial robot grasps the workpiece using negative pressure. The flexible material causes no damage to the surface of the workpiece and can adapt to various workpieces with different shapes and uneven surfaces. The angle of the oil spraying device is flexibly adjustable, the oil spraying position is accurate, and oil is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the present utility model;

[0021] Figure 2 It is a schematic structural diagram of the end effector in the present utility model;

[0022] Figure 3 It is a schematic structural diagram of the first induction rack in the present utility model;

[0023] Figure 4Schematic structural diagram of the oil injection device in the present utility model;

[0024] Figure 5 Schematic diagram of the cooperation between the end effector and the mold in the present utility model;

[0025] Reference signs in the figure: 1, coil reel; 2, leveling machine; 3, punching press; 3a, mold; 3a-1, lower die extension and material supporting positioning plate; 4, industrial robot; 4a, end effector; 4a-1, connecting plate; 4a-2, vacuum sponge suction cup; 4a-3, proximity sensor; 5, first induction frame; 6, second induction frame; 7, feeding device; 8, oil injection device; 8a, nozzle; 8b, universal corrugated pipe. Specific embodiments

[0026] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] As Figures 1 to 5 shown, a stamping production line, applicable to the production of new energy vehicle sewer covers, includes a coil reel 1, a leveling machine 2, and a punching press 3 arranged in sequence, and an industrial robot 4 is arranged beside the punching press 3; among them, the coil reel 1 is used to release a coil with a width of 140 mm and a thickness of 1.5 mm to the leveling machine 2. In the leveling machine 2, the leveling rollers arranged in a staggered manner are used to repeatedly bend the thin plate transmitted from the coil reel 1 for multiple times to achieve the effects of removing internal stress and high-precision leveling. Then, the punching press 3 performs stamping operations according to a preset program, uses a continuous die to stamp the raw material into single-piece workpieces, and then the industrial robot 4 grabs the stamped workpieces and conveys them to subsequent processes.

[0028] Because there is no gap connection between the coil reel 1 and the leveling machine 2, and between the leveling machine 2 and the feeding device 7, but there is a waiting material area respectively, and the orderly and coordinated material transfer of the three is realized through the waiting material area. A first induction frame 5 is arranged in the waiting material area between the coil reel 1 and the leveling machine 2, and a second induction frame 6 is arranged in the waiting material area between the leveling machine 2 and the punching press 3. The first induction frame 5 includes a horizontally arranged and conductive induction rod, and the induction rod is supported by a bracket off the ground. The two ends of the induction rod are connected to the vertical grooves provided on the bracket. Changing the fixed position of the induction rod and the vertical groove enables the height of the induction rod off the ground to be adjustable. The structure of the second induction frame 6 is the same as that of the first induction frame 5; the induction rod in the first induction frame 5 is connected to the control system in the coil reel 1 through a wire, and the induction rod in the second induction frame 6 is connected to the control system in the leveling machine 2 through a wire.

[0029] On one side of the punching machine 3 close to the second induction frame, a feeding device 7 is provided. By changing the forward and reverse rotation of the internal power motor, the feeding device 7 can realize the forward and reverse switching of the feeding direction. Specifically, a horizontally placed conveying roller is arranged in the feeding device 7, and there is a gap between the upper conveying roller and the lower conveying roller. The sheet material is clamped between the upper and lower conveying rollers, and the conveying rollers rotate to convey the sheet material to the punching machine 3. A progressive die 3a is arranged in the punching machine 3. The progressive die 3a includes an upper die that can move up and down and a fixed lower die. The punching machine 3 drives the upper die to press down on the lower die to complete the punching action. Since the feeding device 7 intermittently conveys a fixed-length material between the upper die and the lower die, a certain waiting space needs to be set between the coil rack 1 and the leveling machine 2, and between the leveling machine 2 and the feeding device 7. Taking the feeding process between the coil rack 1 and the leveling machine 2 as an example, when the thin sheet exits the coil rack 1, it will sag naturally and form a certain arc downward. When the downward bending arc becomes larger and touches the induction rod 5a, the control circuit will be connected, so that the intermediate relay in the control system of the coil rack 1 jumps. The feeding power motor in the coil rack 1 stops running. When the thin sheet material leaves the induction rod 5a due to the upward feeding of the leveling machine 2 to the punching machine 3, the control circuit is disconnected, and the power motor in the coil rack 1 will continue to run for feeding. In this way, it operates in a cycle to achieve on-demand transmission and achieve the purpose of automatic control, avoiding the phenomenon of material accumulation or insufficient material supply. The feeding control process between the leveling machine 2 and the feeding device 7 is the same in principle, and the second induction frame 6 is used for detection and control.

[0030] During the stamping process of the metal thin sheet, friction will occur between the metal sheet and the die. Without the action of lubricating oil, high-pressure friction will cause problems of stamping defects of the metal sheet, affecting the product quality and shortening the die life. Therefore, an oil spraying device 8 is arranged between the feeding device 7 and the punching machine 3. The oil spraying device 8 includes two nozzles 8a connected to the oil supply pipeline. The two nozzles 8a are arranged one above the other and are connected to the oil supply pipeline through a universal joint corrugated pipe 8b. The universal joint corrugated pipe 8b enables the spraying angle to be flexibly adjustable. The upper and lower nozzles 8a spray oil on the upper and lower surfaces of the material plate respectively. The shearing oil sprayed can form a lubricating film between the metal sheet and the die, reducing the friction force and also reducing the energy consumption of the punching machine 3. The lubricating effect can reduce the deformation and surface defects of the metal sheet, thereby improving the processing accuracy and consistency of the stamping parts. In addition, because a large amount of heat will be generated during the stamping process, the metal sheet may be deformed due to overheating. The shearing oil can absorb part of the heat and reduce the temperature of the metal sheet, ensuring the stability of the stamping process and the product quality.

[0031] Most industrial robots 4 applied to factory production lines are divided into four-axis, five-axis, and six-axis. The end effector of the six-axis industrial robot 4 adopted in this solution can include various forms of tools, such as grippers, collision sensors, spray guns, burr grinding tools, and electric welding torches, etc. These tools can be selected and configured according to specific application scenarios and task requirements. In this solution, the end effector 4a installed on the industrial robot 4 is for realizing the grasping function. It includes a connecting plate 4a-1. One end of the connecting plate 4a-1 is connected to the industrial robot 4, and the other end is connected with a vacuum sponge suction cup 4a-2. A proximity sensor 4a-3 is arranged on the side of the vacuum sponge suction cup 4a-2. The upper surface of the connecting plate 4a-1 is connected to the sixth axis at the end of the industrial robot 4.

[0032] The workpiece after stamping in the punching press 3 is grasped by the industrial robot 4. Specifically, as Figure 5 shown, a lower die extension material supporting and positioning plate 3a-1 connected thereto is arranged beside the lower die. The upper surface of the lower die extension material supporting and positioning plate 3a-1 is flush with the upper surface of the lower die. After stamping, the upper die rises. At this time, the stamped workpiece is located above the lower die and the lower die extension material supporting and positioning plate 3a-1. The industrial robot 4 moves to extend the vacuum sponge suction cup 4a-2 above the workpiece and then moves down. As the height of the vacuum sponge suction cup 4a-2 decreases, the proximity sensor 4a-3 detects the lower die extension material supporting and positioning plate 3a-1 below and transmits a signal. The vacuum sponge suction cup 4a-2 contacts the upper surface of the stamped workpiece, and the vacuum sponge suction cup 4a-2 is started to adsorb the stamped workpiece under the sponge block by using negative pressure. Under the action of negative pressure, the sponge block is deformed upward by the workpiece. The soft material can adapt to various workpieces with different shapes, especially uneven surfaces, and has a wide application range;

[0033] In the above process, to facilitate the grasping of the industrial robot 4, the feeding device 7 feeds backward in advance to make the material belt above the lower die retreat. The reason for setting the retreat action: The side of the material belt close to the single-piece workpiece that has completed stamping has also completed stamping, but the distance between this side and the single-piece workpiece that has completed stamping is very close. When the vacuum sponge suction cup 4a-2 grasps the single-piece workpiece, it will grasp the material belt together; thus, when the industrial robot 4 grabs the material, there is only one stamped single-piece workpiece in the die, and it will not grasp one end of the material belt at the same time. After the industrial robot 4 moves to place the stamped single-piece workpiece above the lower die of the next forming die, the vacuum sponge suction cup 4a-2 releases the workpiece.

[0034] The process disclosed in the present utility model greatly improves the production efficiency. The method of using coil stock for continuous supply production can significantly reduce the head and tail losses of materials compared with the traditional single-piece stamping method, thereby improving the material utilization rate, reducing material waste in the production process, and also saving the labor for loading materials. The coil rack 1 feeds the material, the flattening machine 2 flattens it, the feeding device 7 automatically feeds the material, the oil spraying device 8 provides lubrication, the progressive die 3a continuously stamps, and the six-axis industrial robot 4 grabs to form an automated production line, improving the manufacturing quality and production efficiency of new energy vehicle components.

[0035] Based on the embodiments of the present utility model as the inspiration, through the above description, those skilled in the art can make various changes and modifications without departing from the technical idea of the present utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present invention shall be included within the protection scope of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A stamping production line suitable for producing sewer covers for new energy vehicles, characterized in that: It comprises a coil rack (1), a leveler (2) and a punching machine (3) which are arranged in sequence, and an industrial robot (4) is arranged next to the punching machine (3); A first induction frame (5) is provided between the coil rack (1) and the leveling machine (2); A second induction frame (6) is provided between the leveling machine (2) and the punching machine (3); A feeding device (7) is provided on one side of the punch press (3) close to the second induction frame, and the feeding direction of the feeding device (7) is switchable between forward and reverse directions; An oil spray device (8) is provided between the feeding device (7) and the punching machine (3); The industrial robot (4) is provided with an end effector (4a), the end effector (4a) comprising a connecting plate (4a-1), one end of the connecting plate (4a-1) being connected to the industrial robot (4), and the other end being connected to a vacuum sponge suction cup (4a-2), a proximity sensor (4a-3) being provided on a side of the vacuum sponge suction cup (4a-2).

2. A stamping production line according to claim 1, characterized in that: A continuous die (3a) is arranged in the punching machine (3), and the continuous die (3a) comprises an upper die that can move up and down and a fixed lower die, and a lower die extension support positioning plate (3a-1) connected to the lower die is arranged beside the lower die.

3. A stamping production line according to claim 1, characterized in that: The first sensing frame (5) comprises a transversely placed conductive sensing rod, the sensing rod being supported off the ground by a bracket, and the two ends of the sensing rod being connected to vertical slots provided on the bracket. The second sensing frame (6) has the same structure as the first sensing frame (5); the sensing rod in the first sensing frame (5) is connected to a control system in a coiling frame (1) via a wire, and the sensing rod in the second sensing frame (6) is connected to a control system in a leveling machine (2) via a wire.

4. A stamping production line according to claim 1, characterized in that: The feeding device (7) is provided with a flat conveying roller, and a gap is left between the upper conveying roller and the lower conveying roller.

5. A stamping production line according to claim 1, characterized in that: The oil spray device (8) comprises two spray heads (8a) connected to the oil supply pipeline. The two spray heads (8a) are arranged one above the other and one below the other. Both of them are connected to the oil supply pipeline via a universal bamboo tube (8b).

6. A stamping production line according to claim 1, characterized in that: The industrial robot (4) has six axes.

7. A stamping production line according to claim 6, characterized in that: The upper surface of the connecting plate (4a-1) is connected to the sixth axis at the end of the industrial robot (4).

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