A stamping automation workpiece transfer table for automotive parts

Abstract

The present application relates to the technical field of running equipment in the automation production process, in particular to a stamping automation workpiece transfer table for automobile parts, which comprises a hydraulic machine, a lower die is installed on the working platform of the hydraulic machine, a material ejecting device is installed on the lower die, an upper die is installed on the movable end of the hydraulic machine, a control console is installed on one side of the hydraulic machine, a material discharging device is installed on one side of the hydraulic machine, the material discharging device is used to automatically take out the material on the lower die, and a conveying device for conveying the material taken out by the material discharging device to a material stacking site is installed on one side of the hydraulic machine. The finished product is placed on the conveying device by the discharging device, and then the conveying device is used to convey the finished product to the material stacking site, so as to solve the problem that the discharging and conveying of the material in the existing small-scale production workshop are all realized by manual operation, and the labor cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of operating equipment in automated production processes, specifically to a stamping automated parts transfer table for automotive parts. Background Technology

[0002] Existing automotive parts stamping production lines can fully automate the process from sheet metal to finished product using robotic arms and hydraulic presses. However, smaller factories typically cannot use fully automated stamping production lines due to production costs and space constraints. Therefore, existing small-scale automotive parts stamping factories generally require operators to place steel sheets into the grooves of the lower die, start the hydraulic press, and after stamping, another operator removes the finished product. A third operator then transports the finished product to a designated location for stacking. This production method is not only inefficient, but also poses certain safety risks to operators. Furthermore, if the loading and unloading operators miscoordinate, damage to the materials or die can easily occur. Therefore, machines are needed for unloading. Automotive stamped parts are generally large in size, and using robotic arms would require high-power, high-cost robotic arms. Since the motion precision for unloading and transfer does not need to be very high, existing robotic arm technology is not suitable for smaller factories.

[0003] Therefore, an automated stamping transfer table for automotive parts is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide an automated stamping parts transfer table for automotive parts, in which finished products are placed onto a conveying device via an unloading device, and then the conveying device transports the finished products to a material storage location, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An automated stamping part transfer table for automotive parts includes:

[0007] A hydraulic press, wherein a lower mold is installed on the working platform of the hydraulic press, a material ejector is installed on the lower mold, an upper mold is installed on the movable end of the hydraulic press, a control console is installed on one side of the hydraulic press, a material unloading device is installed on one side of the hydraulic press, the material unloading device is used to automatically remove the material from the lower mold, and a transportation device is installed on one side of the hydraulic press to transport the material removed by the material unloading device to a storage location.

[0008] Thin-walled automotive parts are generally manufactured using stamping. The stamping process involves placing a pre-cut steel sheet into a specific shape onto the lower die of a stamping mold. A hydraulic press then moves the upper die, causing them to engage and deform the steel sheet. The resulting stamped part is the finished product. Stamping is not only a simple process but also fast. Many stamping factories have adopted fully automated stamping production lines, which automatically handle feeding, unloading, and material transfer. However, smaller factories often cannot use fully automated stamping production lines due to production costs and space constraints. Therefore, all steps are still performed manually, resulting in low efficiency and high labor costs.

[0009] To address the aforementioned problems, this invention designs a stamping parts transfer table. The transfer table includes a feeding device and a transport device, both located on one side of the hydraulic press. The feeding device automatically removes the stamped parts from the mold and places them onto the transport device. The transport device automatically transports the stamped parts to a material storage area, where operators can wait to retrieve and stack the materials transported by the transport device. Compared to fully automated stamping production lines, this invention's transfer table is smaller, requires less space, and operates at a higher speed.

[0010] Preferably, the feeding device includes a frame installed on one side of the hydraulic press. A through hole is provided on the top wall of the frame. A servo motor is installed inside the frame, and the output end of the servo motor extends through the through hole to the outside of the frame. The output end of the servo motor is connected to a rotating shaft via a coupling. The other end of the rotating shaft is provided with a spline. A bushing is movably installed on the rotating shaft. Multiple fixing rods are evenly and horizontally installed on the outer side wall of the bushing. A housing is installed on the top wall of the outer side of the frame, and the bushing, rotating shaft, and coupling are all located inside the housing. A sliding groove is provided on the inner side wall of the housing to cooperate with the fixing rods. Multiple fixing blocks for preventing the bushing from rotating due to inertia are installed in the sliding groove. A through hole is provided on the top wall of the housing. A zigzag rod is horizontally installed at one end of the bushing that extends through the through hole and out of the outer side of the housing. The other end of the zigzag rod is point A, and the corner of the zigzag rod near point A is point B. A magnetic suction device for clamping materials is installed at point A of the zigzag rod.

[0011] Before the hydraulic press is started, the magnetic suction device is located directly above the conveying device. When starting work, the operator places the steel plate on the lower die and then starts the hydraulic press. The output end of the hydraulic press drives the upper die to move downward and finally fully engage with the lower die. After 8-10 seconds, the steel plate has been completely extruded and formed. The hydraulic press moves the upper die upward, and the ejector device lifts the stamped material from the lower die. At this time, the control system starts the servo motor. The servo motor drives the rotating shaft to rotate 90° and then stops. The rotating shaft drives the bushing to rotate synchronously through the spline. When the bushing rotates, the fixed rod on the bushing will gradually move upward under the action of the slide groove, and quickly descend when the magnetic suction device is close to the top of the material. The zigzag rod at the top of the bushing and the magnetic suction device at point A of the zigzag rod rotate and move up and down synchronously with the bushing. This can avoid interference between the magnetic suction device and the side wall of the stamped part after it is formed. Using the zigzag rod can make the frame installed on one side of the hydraulic press while away from the control console, ensuring that the magnetic suction device will not interfere with the four support columns of the hydraulic press when the zigzag rod rotates. When the bushing stops rotating, point A of the folding rod will be above the midpoint of the material's overall length, while the magnetic suction device will be directly above and in contact with the material. The control system will activate the magnetic suction device, which will lift the material. After 1-2 seconds, the control system will control the servo motor to reverse the shaft by 90°, and the magnetic suction device will return to its original position directly above the conveyor. After the servo motor stops running, the control system will stop activating the magnetic suction device, and the material will fall onto the conveyor. To prevent the shaft and bushing from continuing to rotate due to the inertia of the folding rod and magnetic suction device after the servo motor stops, which could cause the magnetic suction device to collide with the material and damage both, a fixing block is installed on the chute to limit the rotation of the bushing.

[0012] The feeding device of the present invention can not only realize automatic feeding, but also has a simpler structure and wiring compared to the robotic arms of existing fully automatic production lines, thus resulting in lower cost, smaller space required for machine operation, and fewer functions. However, compared to existing manual feeding, the feeding speed of the present invention is basically the same as that of manual feeding, thus reducing labor costs while ensuring production efficiency.

[0013] Preferably, a second fixing rod is vertically installed at the top of the bushing, and the other end of the second fixing rod is connected to one end of a pull rod, the other end of which is connected to point B of the broken line rod.

[0014] To prevent interference between the feeding device and the hydraulic press when the upper mold descends under the control of the hydraulic press, the rotation center of the folding rod is set outside the hydraulic press, thus giving the folding rod a certain length. To prevent the folding rod from flexing and swaying during rotation, which could cause material to fall off the magnetic suction device or collide with the mold, a second fixing rod is installed at the bottom of the end of the folding rod that is fixedly connected to the bushing. The end of the second fixing rod away from the folding rod is fixedly connected to point B of the folding rod by a tie rod to increase the stability of the folding rod. The tie rod needs to be made of a material with a high modulus of elasticity, such as alloy steel or carbon steel.

[0015] Preferably, the magnetic attraction device includes a first bracket rotatably mounted at point A of the folded rod. The first bracket is U-shaped with its opening facing downwards. The rotation direction of the first bracket is perpendicular to the direction of the line connecting points A and B of the folded rod. A second bracket is rotatably mounted at both ends of the first bracket. The rotation direction of the second bracket is the same as that of the first bracket. An electromagnet is vertically mounted at both ends of the second bracket, and the electromagnet is located at the lowest point of the magnetic attraction device. The electromagnets at both ends of each second bracket are located on both sides of the first bracket. The length of the second bracket is one-third to one-quarter of the length of the first bracket.

[0016] The first bracket is rotatably mounted on the folding rod, and the second bracket is rotatably mounted on the first bracket. Both brackets can rotate freely. Therefore, when the bushing moves downward, causing the magnetic attraction device to contact the material, brackets one and two can automatically rotate and adjust according to the shape of the material. When one electromagnet on bracket two touches the material, bracket two will rotate until the other electromagnet on bracket two also touches the material. When all the electromagnets on one bracket two are in contact with the material, bracket one rotates until all the electromagnets on the other bracket two on bracket one are in contact with the material. This not only allows the electromagnets on bracket two to better fit with the material, making the electromagnets more stable and firm when attracting the material, but also makes the magnetic attraction device applicable to materials of various shapes, improving the applicability of the magnetic attraction device. The rotating structure designed in this invention has only two layers. To further improve the fit between the magnetic attraction device and the material, bracket three can be rotatably mounted at both ends of bracket two, and bracket four can be rotatably mounted at both ends of bracket three. Theoretically, the more layers, the more perfect the fit, but the structure will be very bulky, requiring more space to move, similar to a flexible vise.

[0017] Since bracket one and bracket two are rotating, in order to prevent interference when bracket two rotates, the length between points A and B of the broken line rod is 1 / 2 to 1 / 3 of the width of the magnetic attraction device, and the length of bracket two is 1 / 3 to 1 / 4 of the length of bracket one.

[0018] Since stamped parts are generally irregularly shaped, only one electromagnet is installed at each end of bracket two. If two electromagnets were to be installed, a device would be needed to allow both electromagnets to rotate vertically in bracket two; otherwise, one electromagnet might be suspended in the air, resulting in waste. The electromagnets at both ends of bracket two would be located on both sides of bracket one, so that all positions of the electromagnets acting on the material could form a surface rather than a line, ensuring the stability of the material during the rotation of the magnetic attraction device.

[0019] Preferably, the electromagnet is fitted with a plastic shell, and the end of the plastic shell away from the second support is spherical.

[0020] To prevent scratches or damage between the electromagnet and the material, a plastic shell can be wrapped around the outer wall of the electromagnet. The plastic shell can be made of a material with low hardness but high toughness, such as ABS resin and polypropylene. Moreover, making the plastic shell into a spherical shape can prevent excessive stress concentration when the plastic shell collides with the material.

[0021] Preferably, a one-way damping shaft is horizontally installed at point A of the broken line rod, a bracket is rotatably installed on the one-way damping shaft, a torsion spring for resetting is installed between the one-way damping shaft and the bracket, and a torsion spring for resetting is installed between the bracket and the second bracket.

[0022] When the bushing moves downwards through the folding rod and the magnetic suction device until it is in contact with the material, brackets one and two will rotate and tilt to a certain extent. If brackets one and two tilt and rotate along their original paths, they will interfere with the material or the mold. At this time, a larger vertical movement space is required to accommodate the rotation of the feeding device, which is not ideal for some hydraulic presses with small strokes. Therefore, to improve the applicability of the feeding device, torsion springs can be installed between bracket one and the folding rod, and between brackets one and two, to reset the rotation of brackets one and two. However, if bracket one immediately resets under the action of the torsion spring when the folding rod rotates 90° in the opposite direction, it will cause the material to collide with the lower mold, resulting in damage to both the material and the lower mold. Therefore, a one-way damping shaft is installed at one end of the folding rod at point A, and bracket one is rotatably installed on the one-way damping shaft. The one-way damping shaft will cause bracket one to rotate and reset slowly. Therefore, bracket one can slowly rotate and reset within 20 seconds after the feeding device transfers the material to the above device and before the next steel plate is formed. The damping direction of the unidirectional damping shaft needs to be adjusted according to the approximate shape of the material to avoid damping when the magnetic suction device descends and comes into contact with the material.

[0023] Preferably, the transport device includes a conveyor belt device installed on one side of the hydraulic press, and the conveyor belt device is inclined. A platform is provided at the lower end of the conveyor belt device. The conveyor belt of the conveyor belt device is a conveyor belt with low hardness and high surface friction coefficient, such as a mesh plastic conveyor belt.

[0024] The transport device consists of a conveyor belt and a storage platform. When the magnetic suction device rotates the material to directly above the conveyor belt, the control system deactivates the magnetic suction device, and the material falls onto the conveyor belt. The conveyor belt then transports the material to the storage platform, where operators retrieve and stack the material. The time required for the transport device to transfer material from the hydraulic press to the material storage area is only half that of manual handling. To prevent scratches and damage when the material falls onto the conveyor belt, a plastic conveyor belt is used. Furthermore, to prevent the material from sliding on the inclined conveyor belt, which would result in high kinetic energy when the material reaches the storage platform and make it difficult for operators to catch it, a conveyor belt with a high coefficient of surface friction, such as a mesh conveyor belt, is selected.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. Through the cooperation of the unloading device and the conveying device, the unloading device can automatically remove the stamped parts from the mold and place them on the conveying device. The conveying device can automatically transport the stamped parts to the material stacking area, replacing the manual unloading and handling process and reducing labor costs. Moreover, compared with the robotic arms of existing fully automatic stamping production lines, the transmission structure used in this invention is simpler, with fewer wires and electronic components, thus resulting in lower cost and smaller size.

[0027] 2. The magnetic suction device on the feeding device has its first and second supports modified to be rotatably connected and can rotate freely. Therefore, when the magnetic suction device comes into contact with the material, the first and second supports can be rotated and adjusted according to the shape of the material, so that the electromagnet on the second support can make full contact with the material. This makes the magnetic suction device more secure when adsorbing the material, and also makes the magnetic suction device applicable to materials of various shapes, thus improving the applicability of the magnetic suction device.

[0028] 3. Under normal circumstances, brackets one and two cannot rotate back to their original position after being fitted with material. Therefore, the feeding device requires a large vertical space to operate, which limits its applicability to hydraulic presses with large stamping strokes. To address this, a torsion spring is used to allow brackets one and two to rotate back to their original position, ensuring that the space required for the feeding device is fixed and at its minimum, thus improving its versatility. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is the front view of the present invention;

[0031] Figure 3 This is a side view of the present invention;

[0032] Figure 4 This is a top view of the broken line rod of the present invention;

[0033] Figure 5 This is a schematic diagram of the magnetic attraction device of the present invention;

[0034] Figure 6 This is a schematic diagram of the bushing structure of the present invention;

[0035] Figure 7 This is an unfolded view of the inner sidewall of the housing of the present invention;

[0036] Figure 8 This is a partial cross-sectional view of the feeding device of the present invention;

[0037] Figure 9 This is an overall schematic diagram of the material-grabbing state of the magnetic suction device of the present invention;

[0038] Figure 10 This is a front view of the material-grabbing state of the magnetic suction device of the present invention.

[0039] In the diagram: 1. Hydraulic press; 2. Lower mold; 3. Upper mold; 4. Frame; 5. Servo motor; 6. Coupling; 7. Rotating shaft; 8. Bushing; 9. Fixed rod one; 10. Housing; 11. Folding rod; 1101. Point A; 1102. Point B; 12. Fixed rod two; 13. Pull rod; 14. Fixed block; 15. Support one; 16. Support two; 17. Electromagnet; 18. Plastic housing; 19. Conveyor belt device; 20. Platform; 21. Through hole one; 22. Through hole two. Detailed Implementation

[0040] Please see Figures 1 to 10 This invention provides an automated stamping parts transfer table for automotive parts, the technical solution of which is as follows:

[0041] Example 1, Reference Figures 1 to 10 When the material being stamped is steel.

[0042] Before the hydraulic press 1 is started, brackets 15 and 16, mounted on the bending rod 11, are positioned directly above the transport device. At the start of operation, the operator places the steel plate on the lower die 2 and then starts the hydraulic press 1. The output of the hydraulic press 1 drives the upper die 3 downwards until it fully engages with the lower die 2. After 8-10 seconds, the steel plate is completely extruded. The hydraulic press 1 then moves the upper die 3 upwards, and the ejector device lifts the extruded material from the lower die 2. At this point, the control system starts the servo motor 5. The servo motor 5 drives the rotating shaft 7 to rotate 90° via the coupling 6 and then stops. The rotating shaft 7 drives the bushing 8 and the bending rod 11 to rotate synchronously via the spline. The bushing 8 rotates... At this time, the fixed rod 9, which is fixedly installed on the bushing 8, will gradually move upward under the action of the slide groove, so that the electromagnet 17 is completely above the material. When the bracket 15 is close to the top of the material, it will quickly descend under the action of the slide groove. When the folding rod 11 descends, the bracket 15 and the bracket 2 16 on the folding rod 11 will rotate and adjust according to the shape of the material after touching the material, so that the electromagnet 17 on the bracket 2 16 is in full contact with the material. When the servo motor 5 stops starting, the fixed block 14, which is fixedly installed on the slide groove, will block the fixed rod 9, preventing the bushing 8 from continuing to rotate under the inertia of the folding rod 11 and the magnetic attraction device, causing the bracket 2 16 to deviate from the material. After the bushing 8 stops rotating for 1-2 seconds, the control system activates the electromagnet 17, which attracts the material. After 1-2 seconds, the control system controls the servo motor 5 to rotate the shaft 7 90° in reverse. The magnetic attraction device returns to the top of the conveyor device. When the servo motor 5 stops, another fixed block 14, fixedly installed on the chute, blocks the fixing rod 9, preventing the bushing 8 from continuing to rotate under the inertia of the bending rod 11 and the magnetic attraction device, which would cause the material to deviate from the conveyor device. At this time, the operator can place the next piece of material on the lower mold 2 and start the hydraulic press 1. After the servo motor 5 stops, the control system stops activating the magnetic attraction device, and the material will fall onto the conveyor device. After the material separates from the electromagnet 17, the second bracket 16 will rotate back to a horizontal state under the action of the torsion spring, while the first bracket 15 will slowly return to a horizontal state under the combined action of the one-way damping shaft 7 and the torsion spring, and finally return to a horizontal state before the material is completely stamped. The materials that fall onto the conveyor belt will be transported to the storage platform 20, and the operator will take the materials on the storage platform 20 to the material stacking area for stacking.

[0043] Compared to the robotic arms in a fully automated stamping production line, this invention replaces manual labor with a smaller and more cost-effective unloading and transporting device, reducing the need for three operators to complete the stamping process to just two, thus lowering labor costs.

[0044] Example 2, reference Figures 1 to 10When the material being stamped is copper, aluminum, or other materials that cannot be attracted by electromagnet 17.

[0045] Compared to Embodiment 1, Embodiment 2 differs in that the electromagnet 17 is replaced with a suction cup, changing the material feeding device from using magnetic field adsorption to using negative pressure to grip the material. Once the suction cup adheres to the material, the control system activates the negative pressure unit. The negative pressure unit removes the gas from the space between the suction cup and the material through an air pipe, causing the air pressure in the space to be lower than atmospheric pressure. Under atmospheric pressure, the material adheres tightly to the suction cup and does not fall. When the control system shuts off the negative pressure unit, the air pressure between the suction cup and the material equals atmospheric pressure, and the material falls onto the conveyor device.

[0046] Compared to the gripping function of electromagnet 17, gripping with a suction cup is applicable to various materials, offering a wider range of applications, and the suction cup will not scratch the material. However, suction cups also have certain limitations. The material gripped by the suction cup must have a smooth surface in some areas; otherwise, air leakage will occur between the suction cup and the material, preventing the formation of negative pressure. Furthermore, before stamping some materials, a layer of lubricating oil needs to be applied to the material surface. The lubricating oil can absorb the heat generated during stamping deformation and reduce the coefficient of friction on the material surface, preventing the upper die 3 and lower die 2 from scratching the material during extrusion. However, the lubricating oil adsorbed by the suction cup may enter the air pipe, eventually causing blockage and rendering the suction cup ineffective. Therefore, the choice between electromagnet 17 and a suction cup can be made based on production needs.

[0047] Working principle:

[0048] The operator places the material on the lower mold 2 and starts the hydraulic press 1. The hydraulic press 1 drives the upper mold 3 to engage with the lower mold 2 to stamp the material. After the material is stamped, the servo motor 5 drives the feeding device to rotate 90° above the lower mold 2. The feeding device removes the material from the lower mold 2. The servo motor 5 drives the feeding device to rotate 90° in the opposite direction to move the material directly above the conveying device. Then the material is placed on the conveying device, and the conveying device transports the material to the material stacking area.

Claims

1. A stamping automation workpiece transfer platform for automobile accessories, comprising: a hydraulic machine, a lower die is installed on the working platform of the hydraulic machine, a material lifting device is installed on the lower die, an upper die is installed on the movable end of the hydraulic machine, and a control console is installed on one side of the hydraulic machine; characterized in that it further comprises: a material discharging device, which is installed on one side of the hydraulic machine and is used to automatically take out the material on the lower die; a conveying device, which is installed on one side of the hydraulic machine and is used to convey the material taken out by the material discharging device to a stacking location; the material discharging device comprises a rack installed on one side of the hydraulic machine, a through hole one is formed in the top wall of the rack, a servo motor is installed in the rack, the output end of the servo motor extends to the outside of the rack through the through hole one, a shaft is connected to the output end of the servo motor through a shaft coupling, a spline is arranged on the other end of the shaft, a shaft sleeve is movably installed on the shaft, a plurality of fixed rods one are uniformly and horizontally installed on the outer side wall of the shaft sleeve, a housing is installed on the top wall of the outside of the rack, the shaft sleeve, the shaft, and the shaft coupling are all located inside the housing, a sliding groove that cooperates with the fixed rods one is formed in the inner side wall of the housing, a through hole two is formed in the top wall of the housing, a broken line rod is horizontally installed on the end of the shaft sleeve extending out of the housing through the through hole two, the other end of the broken line rod is point A, the corner of the broken line rod close to point A is point B, and a magnetic attraction device for clamping the material is installed on point A of the broken line rod; a fixed rod two is vertically installed on the top end of the shaft sleeve, one end of a pull rod is connected to the other end of the fixed rod two, and the other end of the pull rod is connected to point B of the broken line rod; the magnetic attraction device comprises a support one rotatably installed at point A of the broken line rod, the support one is U-shaped with the opening direction downward, the rotation direction of the support one is perpendicular to the direction of the line connecting point A and point B of the broken line rod, supports two are rotatably installed at both ends of the support one, the rotation direction of the supports two is the same as that of the support one, and electromagnets are vertically installed at both ends of the supports two, with the electromagnets being located at the lowest point of the magnetic attraction device, the length of each support two is one third to one fourth of the length of the support one; a one-way damping shaft is horizontally installed at point A of the broken line rod, a support one is rotatably installed on the one-way damping shaft, a torsional spring for resetting is installed between the one-way damping shaft and the support one, and a torsional spring for resetting is installed between the support one and the supports two; each support two is broken line-shaped, and the electromagnets at both ends of each support two are located on both sides of the support one.

2. The punch automation work-in-process station for automotive parts of claim 1, wherein: A plurality of fixed blocks for preventing the shaft sleeve from rotating due to inertia are installed in the sliding groove.

3. The punch press automated part transfer table for automotive parts of claim 1, wherein: A plastic shell is installed on the electromagnet.

4. The automated transfer station for stamping of automotive parts of claim 3, wherein: The end of the plastic shell away from the support two is spherical.

5. The punch press automated part transfer table for automotive parts of claim 1, wherein: The conveying device comprises a conveyor belt device installed on one side of the hydraulic machine, the conveyor belt device is inclined, a material placing table is arranged at the lower end of the conveyor belt device, and the conveyor belt of the conveyor belt device adopts a grid type plastic conveyor belt with small hardness and large surface friction coefficient.

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