Multi-point forming device for special-shaped plates

Abstract

The invention discloses a special-shaped plate multi-point forming device, and belongs to the technical field of plate forming, the special-shaped plate multi-point forming device comprises a forming machine, the bottom of the forming machine is provided with a base, the side wall of the base is fixedly provided with two supports, the tops of the supports are fixedly provided with grabbing arms, and the two grabbing arms jointly clamp a gasket; the grabbing arm comprises a fixing base, a double-shaft motor, a servo motor, a driving wheel, a middle wheel, a rotating wheel, a rotating rod, an inclined push rod, a supporting table and a clamping block, the support is fixedly arranged at the bottom of the fixing base, the fixing base is in a U shape, the driving wheel, the middle wheel and the rotating wheel are all rotationally arranged in the fixing base, the driving wheel is meshed with the middle wheel, and the rotating rod is meshed with the inclined push rod. And the middle wheel is meshed with the rotating wheel. The two grabbing arms used for clamping the gasket are arranged on the forming machine, so that it is guaranteed that the gasket can be always located between the plate and the punch array in the forming process, and the orange peel effect is avoided after the plate is formed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of plate forming, and particularly relates to a special-shaped plate multi-point forming device. BACKGROUND

[0002] Special-shaped plate refers to those metal plates with irregular shapes and complex three-dimensional curved surfaces, which are different from ordinary flat plates or simple bent parts, and have complex radii and shapes. The multi-point forming method can fundamentally eliminate the dependence on traditional metal molds. For the case of producing a few or dozens of new product prototypes, concept cars, building samples, etc., the multi-point forming method is the most cost-effective metal forming solution. Moreover, for complex three-dimensional curved surfaces without fixed rules and full of artistic sense, the processing difficulty of traditional molds is extremely great, but the multi-point forming technology can be accurately copied pixel by pixel by precisely controlling the height of each punch as long as it can be designed in a computer.

[0003] In the Chinese patent with the publication number CN208357595U, a multi-point forming device is mentioned, which includes an upper mold and a lower mold, and also includes a clamping frame, wherein the upper mold and the lower mold each include one or more groups of punches, and each group of punches includes a plurality of punches arranged in multiple rows and multiple columns; each punch includes a head, a connecting portion, a toothed portion and a protruding portion connected in sequence from the head to the tail; the top of the head is in a circular arc structure; the toothed portion includes a substantially square column-shaped body and multiple rows of toothed structures formed at the four corners of the body, respectively; each toothed structure is formed around a circumference of the square column or at a part of the circumference, and the toothed structures of the toothed portions of adjacent punches can be partially engaged with each other to achieve force transmission, so that the position positioning and clamping of the punches can be quickly realized without the need for screw fixing the punches one by one, thereby greatly saving manpower and resources, improving efficiency and reducing cost.

[0004] In the process of multi-point forming of special-shaped plates, the most common problem is the surface orange peel effect, that is, regular concave-convex marks corresponding to the punch array will be left on the surface of the formed plate, which looks like an orange peel from a distance, hence the name orange peel effect. In order to prevent the orange peel effect, a certain thickness of polyurethane gasket needs to be placed between the plate and the punch array, but the polyurethane gasket is difficult to follow the specified shape of the plate to be formed due to its certain thickness, so the gasket needs to be placed manually by the staff, and the gasket also needs to be ensured to be in the state of being on the plate before forming. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a special-shaped plate multi-point forming device.

[0006] The technical scheme adopted to solve the above technical problems is: The utility model provides a special-shaped plate multi-point forming device, including the forming machine, the bottom of forming machine is provided with the base, the side wall of base is fixedly provided with two supports, the top of support is fixedly provided with the grab arm, and the two grab arms are commonly clamped with the gasket, The grab arm includes a fixed seat, a double-shaft motor, a servo motor, a drive wheel, an intermediate wheel, a rotating wheel, a rotating rod, an inclined push rod, a support table, and a clamping block. The support is fixedly arranged at the bottom of the fixed seat. The fixed seat is U-shaped. The drive wheel, the intermediate wheel, and the rotating wheel are rotatably arranged inside the fixed seat. The drive wheel is engaged with the intermediate wheel, and the intermediate wheel is engaged with the rotating wheel. The double-shaft motor is fixedly connected with the side wall of the drive wheel. The servo motor is arranged on the side wall of the fixed seat. The rotating rod is fixedly arranged on the side wall of the rotating wheel. The rotating rod is rotatably connected with the side wall of the inclined push rod. The other end of the inclined push rod is rotatably connected with the side wall of the clamping block. Two inclined rods are fixedly arranged on the side wall of the fixed seat. The other ends of the two inclined rods are rotatably connected with the side wall of the support table. The clamping block is slidably connected with the top of the support table. The bottom of the support table is provided with an adjusting mechanism for adjusting the level of the support table.

[0007] By the above technical solution, two grab arms for clamping the gasket are arranged on the forming machine. The angle of the grab arm can be freely adjusted. When the array of punches on the forming machine is adjusted, the angle of the grab arm can be adjusted according to the position of the array of punches, so that the gasket can always be between the plate and the array of punches during the forming process, avoiding the orange peel effect after the plate is formed. The advantage of the grab arm in the application is that it can be pushed by the array of punches when the array of punches on the forming machine is pressed down. When the special-shaped plate is pressed, some of the array of punches will rise, and some will not. In order to ensure the pressing effect of the plate, the grab arm needs to extend into the middle position of the forming machine together with the gasket. When the array of pressing punches in the forming machine is pressed down, it is inevitable to contact the grab arm. If a smart mechanical arm is used, it will cause damage to the mechanical arm. The combination of the inclined push rod, the rotating rod, the pull rod, and the swing rod, which has a simpler structure, can be pushed down by the array of punches and will not cause additional damage.

[0008] Further, two groups of drive wheels, intermediate wheels, and rotating wheels are rotatably connected inside the fixed seat, including a left drive wheel, a right drive wheel, a left intermediate wheel, a right intermediate wheel, a left rotating wheel, and a right rotating wheel. The output end of the double-shaft motor is fixedly provided with an extension rod. The extension rod passes through the right drive wheel and the left drive wheel in sequence. The left drive wheel and the right drive wheel are fixedly connected with the side wall of the extension rod.

[0009] By the above technical solution, two groups of drive wheels, intermediate wheels, and rotating wheels are arranged on the left and right sides, which can make the way of pushing the inclined push rod and the clamping block more stable. The extension rod can drive the left drive wheel and the right drive wheel to rotate at the same time, so that the two inclined push rods are pushed at the same time, making the movement of the gasket between the array of punches more smooth.

[0010] Furthermore, a swing rod is rotatably connected to the side wall of the right rotating wheel, and a pull rod is rotatably connected to the other end of the swing rod. The other end of the pull rod is rotatably connected to the end of the inclined push rod away from the clamping block.

[0011] Through the above technical solution, the setting of the swing rod and the pull rod can limit the movement trajectory of the rotating rod and the inclined push rod, thereby ensuring that the inclined push rod can stably push the clamping block towards the middle position of several punch arrays, and then push the shim to the position of the plate to be formed.

[0012] Furthermore, the clamping block includes a sliding block, a middle rod, a U-shaped block, a clamping plate, a top plate, two moving rods, and two side plates. The middle rod is fixedly disposed between the two side plates. The inclined push rod is spherically rotatably connected to the side wall of the side plate. The sliding block is fixedly disposed on the side wall of the middle rod. A vertical groove is provided on the top of the support platform. The sliding block is slidably connected to the inner wall of the vertical groove. The U-shaped block is fixedly disposed between the two side plates. Two moving holes are provided on the top of the U-shaped block. The two moving rods pass through the two moving holes respectively. The top plate is fixedly disposed on the top of the two moving rods. The clamping plate is fixedly disposed at the bottom of the two moving rods. The clamping plate abuts against the side wall of the pad.

[0013] With the above technical solution, when the side plate is pushed by the inclined push rod, the sliding block will move along the vertical groove towards the middle position of several punch arrays. The clamping plate will hold the gasket inside the U-shaped block. The U-shaped block is used to facilitate the fixing of the two ends of the gasket. The two U-shaped blocks arranged side by side do not affect the lateral clamping of the gasket. Moreover, the movable moving rod and clamping plate can also easily adapt to gaskets of different thicknesses, thereby meeting the forming requirements of plates of different thicknesses.

[0014] Furthermore, a motion spring is sleeved on the outside of the motion rod, with one end of the motion spring fixedly connected to the top of the U-shaped block and the other end fixedly connected to the top and bottom of the block.

[0015] Through the above technical solution, the motion spring can apply a downward force to the top plate, the motion rod and the clamping plate, so that the clamping plate can firmly hold the pad. Since the several punch arrays of the forming machine apply a large pressure to the plate when forming the plate, fixing the position of the pad can effectively prevent the pad from separating from the plate, thereby avoiding the orange peel effect on the surface of the plate.

[0016] Furthermore, the adjustment mechanism includes a driving wheel, a driven wheel, two side rods, two side bevel gears, two bottom bevel gears, and two lifting screws. An extension rod is fixedly connected to the output end of the servo motor, passing through the side wall of the right middle wheel. The driving wheel is fixedly mounted on the side wall of the extension rod. A support base is fixedly mounted at the bottom of the support platform. The side rods are rotatably connected to the side walls of the support base. The driven wheel is fixedly connected to the side walls of the side rods. The driving wheel and driven wheel are driven by a belt. The two side bevel gears are respectively fixedly mounted at both ends of the side rods. The bottom bevel gear is located below the support platform and meshes with the side bevel gears. The bottom bevel gear has an internal thread, through which the lifting screw passes. The lifting screw is rotatably connected to the bottom of the support platform, and the threads of the two lifting screws are in opposite directions.

[0017] Through the above technical solution, the operation of the servo motor will drive the extension rod to rotate, which in turn will cause the driving wheel to drive the driven wheel to rotate. The double-sided rod set on the side wall of the driven wheel will drive the side bevel gear to rotate, and the bottom bevel gear meshing with it will drive the lifting screw to rise and fall. Since the threads of the two lifting screws are opposite, the support platform will tilt to adapt to the position of the raised punch array.

[0018] Furthermore, a fixing ring is rotatably connected to the bottom bevel gear sidewall, and a vertical plate is fixedly installed at the bottom of the support platform, with the sidewall of the vertical plate being fixedly connected to the sidewall of the fixing ring.

[0019] Through the above technical solution, the setting of the fixing ring and the vertical plate allows the bottom bevel gear to be fixed under the support platform. Since the lifting screw will cause the support platform to tilt, in order to ensure that the bottom bevel gear and the side bevel gear can always be in the same position under the support platform, it is necessary to fix both of them to the bottom of the support platform.

[0020] Furthermore, the belt between the driving wheel and the driven wheel is located between two inclined rods, which are respectively located on both sides of the driven wheel.

[0021] Through the above technical solution, the telescopic diagonal bar can always maintain its connection with the fixed seat when the support platform tilts. Moreover, the wide gap between the two diagonal bars can also ensure the stability of the support platform. In addition, the shape of the diagonal bar does not need to be rectangular; the diagonal bar can be arc-shaped, which makes it easier to avoid the position of the punch array that has not been raised.

[0022] Furthermore, the two lifting screws are located on both sides of the support platform, and the distance between the two lifting screws is greater than the distance between the two side plates.

[0023] With the above technical solution, since the tilt of the support platform is directly affected by the lifting screw, the lifting screw is best located on both sides of the support platform. The distance between the two side plates mainly depends on the distance between the two inclined push rods, and further, it depends on the distance between the two sides of the fixed seat. Therefore, there is no hard and fast rule.

[0024] Furthermore, there are two rotating rods and two inclined push rods, one of which is fixedly connected to the side wall of the left rotating wheel, and the other is rotatably connected to the side wall of the right rotating wheel.

[0025] The reason why the two sets of rotating rods were not set to be exactly the same is that in actual production and use, there will inevitably be slight differences in rotation between the left and right rotating wheels. If both rotating rods are fixed, the slight difference in rotation between the left and right rotating wheels will affect the advancement of the inclined push rod on the clamping block, and thus affect the position of the shim.

[0026] The beneficial effects of this invention are as follows: (1) The present invention provides two gripping arms for holding the pad on the molding machine, and the angle of the gripping arms can be freely adjusted. When the molding machine adjusts the lifting position of several punch arrays, the gripping arms can adjust their own angle according to the position of the raised punch array, and can also adjust the tilt angle of the support table according to the punch array, thereby ensuring that the pad can always be between the plate and the punch array during the molding process, and avoiding the orange peel effect of the plate after molding. (2) By setting up a slanted push rod, a rotating rod, a pull rod and a swing rod, the gripper in this application has the advantage of being pushed by the punch array when pressed down by the punch array of the forming machine. Because when pressing irregularly shaped plates, some punch arrays will rise and some will not rise. In order to ensure the pressing effect of the plate, the gripper needs to be inserted into the middle position of the forming machine together with the pad. When the pressing punch array in the forming machine presses down, it will inevitably come into contact with the gripper. If an intelligent robotic arm is used, it will cause damage to the robotic arm. Using a combination of slanted push rod, rotating rod, pull rod and swing rod with a simpler structure, it can be pushed down by the punch array without causing additional damage. (3) By setting a diagonal bar between the support platform and the fixed seat, the present invention can ensure the connection between the telescopic diagonal bar and the fixed seat when the support platform tilts. Moreover, the wide space between the two diagonal bars can also ensure the stability of the support platform. At the same time, the shape of the diagonal bar is not fixed to a rectangle. The diagonal bar can also be set to an arc shape. Since the diagonal bar and the support platform need to extend into the middle of several punch arrays, it is easier to avoid the position of the punch array that has not been raised if it is set to an arc shape. (4) The present invention provides a fixing ring, a vertical plate and a bottom bevel gear at the bottom of the support platform. The fixing ring and the vertical plate allow the bottom bevel gear to be fixed below the support platform. The support base and the double-sided rods also allow the side bevel gear to be fixed below the support platform. Since the lifting screw will cause the support platform to tilt, in order to ensure that the bottom bevel gear and the side bevel gear can always be in the same position below the support platform, it is necessary to fix both of them at the bottom of the support platform. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the clamping arm from a first-view perspective in this invention; Figure 3 This is a left sectional view of the fixing base in this invention; Figure 4 This is a right-side sectional view of the fixing base in this invention; Figure 5 This is a schematic diagram of the second-view structure of the clamping arm in this invention; Figure 6 This is a schematic diagram of the clamping arm from a third-view perspective in this invention; Figure 7 yes Figure 6 A magnified view of a section at point A in the middle; Figure 8 This is a schematic diagram of the clamping arm from a fourth perspective in this invention; Figure 9 yes Figure 8 A magnified view of a section at point B in the middle; Figure 10 This is a schematic diagram of the bottom bevel gear and lifting screw in this invention.

[0028] Reference numerals: 1. Molding machine; 2. Base; 3. Support; 4. Fixed base; 5. Dual-axis motor; 6. Servo motor; 7. Rotating rod; 8. Inclined push rod; 9. Support platform; 10. Inclined rod; 11. Left drive wheel; 12. Right drive wheel; 13. Left intermediate wheel; 14. Right intermediate wheel; 15. Left rotating wheel; 16. Right rotating wheel; 17. Extension rod; 18. Swing rod; 19. Pull rod; 20. Sliding block; 2 1. Intermediate rod; 22. U-shaped block; 23. Clamping plate; 24. Top plate; 25. Moving rod; 26. Side plate; 27. Vertical groove; 28. Moving hole; 29. ​​Moving spring; 30. Driving wheel; 31. Driven wheel; 32. Double-sided rod; 33. Side bevel gear; 34. Bottom bevel gear; 35. Lifting screw; 36. Extension rod; 37. Support seat; 38. Internal thread; 39. Fixing ring; 40. Vertical plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] like Figure 1 - Figure 2 As shown, this embodiment provides a multi-point forming device for irregularly shaped plates, including a forming machine 1. A base 2 is provided at the bottom of the forming machine 1, and two supports 3 are fixedly provided on the side wall of the base 2. A gripper arm is fixedly provided on the top of the support 3. A gasket is held on both gripper arms. The gasket can be made of polyurethane or other materials because it has a wide range of adjustable performance, strong adaptability, good wear resistance, and high mechanical strength, making it very suitable for use as a buffer between the plate and the punch array. At the same time, the thickness of the gasket can also be selected according to the plate to be formed. If the plate to be formed is thicker, a thicker gasket can be selected. If the plate to be formed is thinner, a thinner gasket can be selected. Under the premise of not affecting the forming effect, a gasket with stronger buffering performance should be selected as much as possible.

[0031] Combined with references Figure 2 - Figure 5 As can be seen from the content, the grab arm includes a fixed base 4, a dual-axis motor 5, a servo motor 6, a drive wheel, an intermediate wheel, a rotating wheel, a rotating rod 7, a diagonal push rod 8, a support platform 9, and a clamping block. The support 3 is fixedly installed at the bottom of the fixed base 4. The fixed base 4 is U-shaped. The drive wheel, intermediate wheel, and rotating wheel are all rotatably installed inside the fixed base 4. The drive wheel meshes with the intermediate wheel, and the intermediate wheel meshes with the rotating wheel. The dual-axis motor 5 is fixedly connected to the side wall of the drive wheel. Two sets of drive wheels, intermediate wheels, and rotating wheels are rotatably connected inside the fixed base 4, including a left drive wheel 11, a right drive wheel 12, a left intermediate wheel 13, and a right intermediate wheel 14. Left rotating wheel 15, right rotating wheel 16, and an extension rod 17 are fixedly installed at the output end of the dual-axis motor 5. The extension rod 17 passes through the right drive wheel 12 and the left drive wheel 11 in sequence. The left drive wheel 11 and the right drive wheel 12 are both fixedly connected to the side wall of the extension rod 17. Two gripping arms for holding the pad are set on the forming machine 1. The angle of the gripping arms can be freely adjusted. When the forming machine 1 adjusts the angle position of the punch array, the gripping arms can adjust their own angle according to the position of the punch array, so as to ensure that the pad can always be between the plate and the punch array during the forming process, and avoid the orange peel effect of the plate after forming.

[0032] There are two rotating rods 7 and two inclined push rods 8. One rotating rod 7 is fixedly connected to the side wall of the left rotating wheel 15, and the other rotating rod 7 is rotatably connected to the side wall of the right rotating wheel 16. The reason why the two sets of rotating rods 7 are not set to be exactly the same is that in actual production and use, there will inevitably be slight differences in rotation between the left rotating wheel 15 and the right rotating wheel 16. If both rotating rods 7 are fixed, the slight difference in rotation between the left rotating wheel 15 and the right rotating wheel 16 will affect the advancement of the inclined push rod 8 on the clamping block, and thus affect the position of the shim.

[0033] A swing rod 18 is rotatably connected to the side wall of the right rotating wheel 16. A pull rod 19 is rotatably connected to the other end of the swing rod 18. The other end of the pull rod 19 is rotatably connected to the end of the inclined push rod 8 away from the clamping block. The swing rod 18 and the pull rod 19 can limit the movement trajectory of the rotating rod 7 and the inclined push rod 8, thereby ensuring that the inclined push rod 8 can stably push the clamping block toward the middle position of several punch arrays, and then push the pad to the position of the plate to be formed.

[0034] Compared to more intelligent and comprehensive robotic arms, the gripper in this application has the advantage of being pushed by the punch array when pressed down by the forming machine 1. This is because when pressing irregularly shaped sheets, some punch arrays will rise while others will not. In order to ensure the pressing effect of the sheet, the gripper needs to be inserted into the middle position of the forming machine 1 along with the pad. When the pressing punch array in the forming machine 1 presses down, it will inevitably come into contact with the gripper. If an intelligent robotic arm is used, it will cause damage to the robotic arm. However, by using a combination of a simpler structure, such as a slanted push rod 8, a rotating rod 7, a pull rod 19, and a swing rod 18, the gripper can be pushed down by the punch array without causing additional damage.

[0035] from Figure 6 - Figure 7As can be seen from the content, the servo motor 6 is mounted on the side wall of the fixed base 4, the rotating rod 7 is fixedly mounted on the side wall of the rotating wheel, the rotating rod 7 is rotatably connected to the side wall of the inclined push rod 8, and the other end of the inclined push rod 8 is rotatably connected to the side wall of the clamping block. The clamping block includes a sliding block 20, a middle rod 21, a U-shaped block 22, a clamping plate 23, a top plate 24, two moving rods 25, and two side plates 26. The middle rod 21 is fixedly mounted between the two side plates 26, the inclined push rod 8 is spherically rotatably connected to the side wall of the side plate 26, the sliding block 20 is fixedly mounted on the side wall of the middle rod 21, and a vertical groove 27 is opened on the top of the support platform 9, through which the sliding block 20 slides against the inner wall of the vertical groove 27. The connection is made by fixing the U-shaped block 22 between the two side plates 26. The top of the U-shaped block 22 has two moving holes 28. The two moving rods 25 pass through the two moving holes 28 respectively and are fixedly set on the top of the two moving rods 25. The clamping plate 23 is fixedly set on the bottom of the two moving rods 25. The clamping plate 23 abuts against the side wall of the gasket and clamps the gasket inside the U-shaped block 22. The reason for using the U-shaped block 22 is to facilitate the fixing of the two ends of the gasket. The two U-shaped blocks 22 arranged side by side do not affect the lateral clamping of the gasket. Moreover, the movable moving rods 25 and the clamping plate 23 can also easily adapt to gaskets of different thicknesses.

[0036] A motion spring 29 is sleeved on the outside of the motion rod 25. One end of the motion spring 29 is fixedly connected to the top of the U-shaped block 22, and the other end is fixedly connected to the top and bottom. The motion spring 29 can apply a downward force to the top plate 24, the motion rod 25 and the clamping plate 23, so that the clamping plate 23 can firmly hold the pad. Since the pressure applied to the plate by the array of punches of the forming machine 1 is large when forming the plate, fixing the position of the pad can effectively prevent the pad from separating from the plate.

[0037] Reference Figure 4 and Figure 5 as well as Figure 8 - Figure 10As can be seen from the content, two inclined rods 10 are rotatably mounted on the side wall of the fixed base 4. The other ends of the two inclined rods 10 are rotatably connected to the side wall of the support platform 9. The inclined rods 10 are telescopic rods. The clamping block is slidably connected to the top of the support platform 9. The bottom of the support platform 9 is provided with an adjustment mechanism for adjusting the level of the support platform 9. The adjustment mechanism includes a driving wheel 30, a driven wheel 31, a double-sided rod 32, two side bevel gears 33, two bottom bevel gears 34, and two lifting screws 35. The output end of the servo motor 6 is fixedly connected to an extension rod 36. The extension rod 36 passes through the side wall of the right middle wheel 14. The driving wheel 30 is fixedly mounted on the side wall of the extension rod 36. A support base is fixedly mounted at the bottom of the support platform 9. 37. The double-sided rod 32 is rotatably connected to the side wall of the support base 37. The driven wheel 31 is fixedly connected to the side wall of the double-sided rod 32. The driving wheel 30 and the driven wheel 31 are belt driven. The belt between the driving wheel 30 and the driven wheel 31 is located between the two inclined rods 10. The two inclined rods 10 are located on both sides of the driven wheel 31. The telescopic inclined rods 10 can always maintain the connection between the support platform 9 and the fixed base 4 when the support platform 9 tilts. Moreover, the wide space between the two inclined rods 10 can also ensure the stability of the support platform 9. At the same time, the shape of the inclined rods 10 does not need to be rectangular. The inclined rods 10 can be arc-shaped, which makes it easier to avoid the position of the punch array that has not been raised.

[0038] Two side bevel gears 33 are fixedly mounted at both ends of the double-sided rods 32. The bottom bevel gear 34 is located below the support platform 9 and meshes with the side bevel gears 33. The bottom bevel gear 34 has an internal thread 38, through which the lifting screw 35 passes, making it rotatably connected to the bottom of the support platform 9. The threads of the two lifting screws 35 are opposite, and the two lifting screws 35 are located on both sides of the support platform 9. The distance between the two lifting screws 35 is greater than the distance between the two side plates 26. Since the tilt of the support platform 9 is directly affected by the lifting screws 35, it is best for the lifting screws 35 to be located on both sides of the support platform 9. The distance between the two side plates 26 mainly depends on the distance between the two inclined push rods 8, and further, on the distance between the two sides of the fixed seat 4. Therefore, there is no hard and fast rule.

[0039] A fixing ring 39 is rotatably connected to the side wall of the bottom bevel gear 34. A vertical plate 40 is fixedly installed at the bottom of the support platform 9. The side wall of the vertical plate 40 is fixedly connected to the side wall of the fixing ring 39. The setting of the fixing ring 39 and the vertical plate 40 allows the bottom bevel gear 34 to be fixed below the support platform 9. Since the lifting screw 35 will cause the support platform 9 to tilt, in order to ensure that the bottom bevel gear 34 and the side bevel gear 33 can always be located in the same position below the support platform 9, both of them need to be fixed to the bottom of the support platform 9.

[0040] The working principle of this embodiment is as follows: First, the top plate 24 is lifted upward, so that the two moving rods 25 fixedly connected to the top plate 24 stretch the moving spring 29, so that the clamping plate 23 is lifted. Then, the worker can put the pad into the position between the clamping plate 23 and the U-shaped block 22. After the top plate 24 is released, under the elastic force of the moving spring 29, the clamping plate 23 will firmly hold the position of the pad. When the operator controls the servo motor 6 to operate, the extension rod 36 at the output end of the servo motor 6 will drive the drive wheel 30 to rotate. After passing through the belt drive, it will drive the driven wheel 31 to rotate together. The double-sided rod 32 set on the side wall of the driven wheel 31 will drive the side bevel gear 33 to rotate. The bottom bevel gear 34 that meshes with it will drive the lifting screw 35 to rise and fall. Since the threads of the two lifting screws 35 are opposite, the positions of the two sides of the support platform 9 will be tilted, so that the support platform 9 can adapt to the position of the raised punch array. Then, the operator controls the punch array at the bottom of the forming machine 1 to rise to the required shape. The operator then controls the dual-axis motor 5 to operate. The extension rod 17 fixed to the output end of the dual-axis motor 5 can drive the left drive wheel 11 and the right drive wheel 12 to rotate together. The left intermediate wheel 13 and the right intermediate wheel 14, which are meshed with it, will rotate together. The left drive wheel 11, which is meshed with it, will drive the rotating rod 7 to rotate. Then, the inclined push rod 8 will push the side plate 26 to slide along the vertical groove 27. The U-shaped block 22 set in the side plate 26 will push the pad to the middle position of the punch array. Then, the pad can be placed between the punch array and the plate, thereby avoiding the orange peel effect on the surface of the plate.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A multi-point forming device for irregularly shaped sheet metal, comprising a forming machine (1), characterized in that: The molding machine (1) has a base (2) at the bottom, and two supports (3) are fixedly installed on the side wall of the base (2). A gripper arm is fixedly installed on the top of the support (3), and a pad is clamped on both grippers. The gripper arm includes a fixed base (4), a dual-axis motor (5), a servo motor (6), a drive wheel, an intermediate wheel, a rotating wheel, a rotating rod (7), a slanted push rod (8), a support platform (9), and a clamping block. The support (3) is fixedly installed at the bottom of the fixed base (4). The fixed base (4) is U-shaped. The drive wheel, intermediate wheel, and rotating wheel are all rotatably installed inside the fixed base (4). The drive wheel meshes with the intermediate wheel, and the intermediate wheel meshes with the rotating wheel. The dual-axis motor (5) is fixedly connected to the side wall of the drive wheel. The servo motor (6) is installed on the fixed base. The rotating rod (7) is fixedly installed on the side wall of the rotating wheel. The rotating rod (7) is rotatably connected to the side wall of the inclined push rod (8). The other end of the inclined push rod (8) is rotatably connected to the side wall of the clamping block. The side wall of the fixed seat (4) is rotatably provided with two inclined rods (10). The other end of the two inclined rods (10) is rotatably connected to the side wall of the support platform (9). The inclined rods (10) are telescopic rods. The clamping block is slidably connected to the top of the support platform (9). The bottom of the support platform (9) is provided with an adjustment mechanism for adjusting the level of the support platform (9).

2. The multi-point forming device for irregularly shaped sheets according to claim 1, characterized in that, The fixed base (4) is rotatably connected to two sets of drive wheels, intermediate wheels and rotating wheels, including a left drive wheel (11), a right drive wheel (12), a left intermediate wheel (13), a right intermediate wheel (14), a left rotating wheel (15) and a right rotating wheel (16). An extension rod (17) is fixedly installed at the output end of the dual-axis motor (5). The extension rod (17) passes through the right drive wheel (12) and the left drive wheel (11) in sequence. The left drive wheel (11) and the right drive wheel (12) are both fixedly connected to the side wall of the extension rod (17).

3. The multi-point forming device for irregularly shaped plates according to claim 2, characterized in that, The right rotating wheel (16) is rotatably connected to a swing rod (18) on its side wall. The other end of the swing rod (18) is rotatably connected to a pull rod (19). The other end of the pull rod (19) is rotatably connected to the end of the inclined push rod (8) away from the clamping block.

4. The multi-point forming device for irregularly shaped plates according to claim 2, characterized in that, The clamping block includes a sliding block (20), a middle rod (21), a U-shaped block (22), a clamping plate (23), a top plate (24), two moving rods (25), and two side plates (26). The middle rod (21) is fixedly disposed between the two side plates (26). The inclined push rod (8) is spherically connected to the side wall of the side plate (26). The sliding block (20) is fixedly disposed on the side wall of the middle rod (21). The support platform (9) has a vertical groove (27) on its top. The sliding block (20) is slidably connected to the inner wall of the vertical groove (27). The U-shaped block (22) is fixedly disposed between the two side plates (26). The top of the U-shaped block (22) has two moving holes (28). The two moving rods (25) pass through the two moving holes (28) respectively. The top is fixedly disposed on the top of the two moving rods (25). The clamping plate (23) is fixedly disposed at the bottom of the two moving rods (25). The clamping plate (23) abuts against the side wall of the pad.

5. The multi-point forming device for irregularly shaped plates according to claim 4, characterized in that, The motion rod (25) is fitted with a motion spring (29), one end of which is fixedly connected to the top of the U-shaped block (22), and the other end is fixedly connected to the top and bottom.

6. The multi-point forming device for irregularly shaped sheets according to claim 4, characterized in that, The adjustment mechanism includes a drive wheel (30), a driven wheel (31), two side rods (32), two side bevel gears (33), two bottom bevel gears (34), and two lifting screws (35). The output end of the servo motor (6) is fixedly connected to an extension rod (36). The extension rod (36) passes through the side wall of the right middle wheel (14). The drive wheel (30) is fixedly mounted on the side wall of the extension rod (36). A support base (37) is fixedly mounted at the bottom of the support platform (9). The side rods (32) are rotatably connected to the side wall of the support base (37). The driven wheel (31) is connected to the side rods (35). The rod (32) is fixedly connected to the side wall. The driving wheel (30) and the driven wheel (31) are driven by a belt. The two side bevel gears (33) are fixedly installed at both ends of the double-sided rod (32). The bottom bevel gear (34) is located below the support platform (9). The bottom bevel gear (34) meshes with the side bevel gear (33). The bottom bevel gear (34) has an internal thread (38). The lifting screw (35) passes through the internal thread (38). The lifting screw (35) is rotatably connected to the bottom of the support platform (9). The threads of the two lifting screws (35) are opposite.

7. The multi-point forming device for irregularly shaped plates according to claim 6, characterized in that, The bottom bevel gear (34) is rotatably connected to a fixing ring (39), and a vertical plate (40) is fixedly installed at the bottom of the support platform (9). The side wall of the vertical plate (40) is fixedly connected to the side wall of the fixing ring (39).

8. The multi-point forming device for irregularly shaped sheets according to claim 6, characterized in that, The belt between the driving wheel (30) and the driven wheel (31) is located between two inclined rods (10), which are located on both sides of the driven wheel (31).

9. The multi-point forming device for irregularly shaped plates according to claim 6, characterized in that, The two lifting screws (35) are located on both sides of the support platform (9), and the distance between the two lifting screws (35) is greater than the distance between the two side plates (26).

10. The multi-point forming device for irregularly shaped sheets according to claim 2, characterized in that, There are two rotating rods (7) and two inclined push rods (8). One of the rotating rods (7) is fixedly connected to the side wall of the left rotating wheel (15), and the other rotating rod (7) is rotatably connected to the side wall of the right rotating wheel (16).

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