Automatic feed metal drawing machine

Abstract

The application discloses a kind of automatic metal drawing machine of feeding, it is related to metal drawing machine technical field, including first lower mould and second upper mould, the two sides of the first lower mould are fixed with first electric push rod, the top of the first lower mould is provided with first upper mould, the top of telescopic rod is fixed with dividing piece, the end of the first pipeline, second pipeline is connected with oil tank by pump body, the top of the first upper mould is fixed with second lower mould.This kind of automatic metal drawing machine of feeding can realize automatic feeding and discharging, and the position of metal plate is adjusted during feeding process, to improve the stability during moving, avoid shaking caused by unstable gravity center, and the position of any diameter circular metal plate can be further adjusted before stretching, to ensure the product appearance after stretching to prevent defective products, and the stretching of two metal plates can be completed by the telescopic stroke of hydraulic cylinder, which is beneficial to greatly improve work efficiency.

Description

Technical Field

[0001] This invention relates to the field of metal stretching machine technology, specifically to an automatic feeding metal stretching machine. Background Technology

[0002] A metal stretching machine is a machine that uses a hydraulic cylinder to push an upper die to press down on a metal sheet, causing the metal sheet to stretch and deform under the action of the inner cavity structure of the upper die and the outer structure of the lower die. Typically, a metal stretching machine can be used to shape metal sheets into box-shaped or cylindrical structures.

[0003] Existing metal stretching machines can only stretch and deform metal sheets by working with the lower die structure during the process of the upper die being pushed down by the hydraulic cylinder. However, they cannot stretch and deform a second sheet of metal during the process of the upper die rising, resulting in poor processing efficiency of the metal sheets. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic feeding metal stretching machine, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic feeding metal stretching machine, comprising a first lower die and a second upper die, wherein a first electric push rod is fixed on both sides of the first lower die, and a first die sleeve is fixed on the top of the first electric push rod; a feeding belt is provided on the left side of the first die sleeve, and a discharging belt is provided on the right side of the first die sleeve; a clamping assembly is provided between the feeding belt and the discharging belt, and the clamping assembly is located in front of the first die sleeve; a first upper die is provided above the first lower die, and telescopic rods are fixed on both sides of the outer wall of the first upper die; a dividing member is fixed on the top of the telescopic rod, and a cylinder is provided outside the dividing member; a first pipe is connected to the top side of the cylinder, and a second pipe is connected to the bottom side of the cylinder; the ends of the first pipe and the second pipe are connected to an oil tank through a pump body; a second lower die is fixed on the top of the first upper die, and a second die sleeve is fitted outside the second lower die; second electric push rods are fixed on both sides of the bottom of the second die sleeve; and a second upper die is provided above the second lower die.

[0006] Furthermore, the first mold sleeve is fitted over the outside of the first lower mold, and the top edge of the first lower mold is chamfered.

[0007] Furthermore, the cylinder body is connected to the oil tank through a first pipe and a second pipe, and the dividing piece divides the interior of the cylinder body into two spaces.

[0008] Furthermore, the clamping assembly includes a lifting push rod, a telescopic push rod, a suction cup, a micro push rod, a clamping plate, a ball bearing, and a vacuum pump. The top of the lifting push rod is fixed with a telescopic push rod, and the bottom left end of the telescopic push rod is connected to a suction cup. The upper part of the suction cup is surrounded by micro push rods, which are fixedly connected to the telescopic push rod. A clamping plate is provided on the side of the micro push rod away from the suction cup, and a ball bearing is embedded in the bottom of the clamping plate. The top of the suction cup is connected to a vacuum pump, and the bottom of the lifting push rod is connected to a servo motor.

[0009] Furthermore, the clamping pieces are symmetrically distributed about the vertical central axis of the suction cup, and there are a total of four clamping pieces.

[0010] Furthermore, the top of the first mold sleeve and the second mold sleeve are provided with auxiliary positioning components, and the auxiliary positioning components are used to adjust the central axis of the metal sheet so that it coincides with the central axis of the first lower mold and the second lower mold.

[0011] Furthermore, the auxiliary positioning component includes a disc box, a wire groove, a chassis, a telescopic component, and a transmission column. The surface of the disc box is provided with a wire groove, and the chassis is slidably connected to the bottom of the inner wall of the disc box. The surface of the chassis is hinged with a telescopic component, and the top of the telescopic component is provided with a transmission column.

[0012] Furthermore, the transmission column passes through the groove, and the telescopic component is distributed perpendicular to the transmission column.

[0013] Furthermore, the auxiliary positioning component also includes a meshing gear and a micro motor. The meshing gear is meshed on the side of the chassis, and the micro motor is connected to the bottom of the meshing gear.

[0014] Furthermore, the micro motor is fixedly connected to the disc box, and the chassis is connected to the micro motor via meshing gears.

[0015] This invention provides an automatic feeding metal stretching machine, which has the following beneficial effects:

[0016] This metal stretching machine can automatically load and unload materials, and adjust the position of the metal sheet during the loading process to improve stability during movement and avoid swaying due to instability of the center of gravity. Before stretching, the position of any diameter circular metal sheet can be further adjusted to ensure the aesthetics of the stretched product and prevent defective products. Furthermore, one extension and retraction stroke of the hydraulic cylinder can complete the stretching of two metal sheets, which helps to significantly improve work efficiency.

[0017] 1. In this automatic feeding metal stretching machine, metal sheets are placed on the surfaces of the first lower die and the second lower die, respectively. The oil tank injects oil into the cylinder through the first pipe to push the dividing element, causing the telescopic rod to extend and carry the first upper die down. Thus, the descent of the first upper die, in conjunction with the first lower die, stretches and deforms the metal sheet. Then, the oil tank injects oil into the cylinder through the second pipe to push the dividing element, causing the telescopic rod to retract and carry the first upper die up. Thus, the second lower die, in conjunction with the second upper die, stretches and deforms another metal sheet. This fully utilizes the telescopic rod's extension and retraction mechanism, allowing for two stretching operations on the metal sheet in a single extension, thereby improving work efficiency. Furthermore, the extension and retraction of the telescopic rod are both achieved through oil injection, meaning the force provided by the extension and retraction of the telescopic rod is consistent, ensuring that the two metal sheets are subjected to equal force.

[0018] 2. In this automatic feeding metal stretching machine, the spacing between the clamping plates is expanded by a miniature push rod. A servo motor drives the suction cup to rotate the clamping plates above the feeding belt. Then, the lifting push rod is used to lower the suction cup so that it adheres to the surface of the metal sheet, while the clamping plates abut against the surface of the feeding belt. At this time, the force-bearing part of the feeding belt is concave so that the clamping plates can retract and clamp the metal sheet. During the clamping process, the position of the metal sheet is adjusted so that the suction cup moves to the center of the metal sheet. At this time, the vacuum pump operates so that the plate is firmly adsorbed on the surface of the metal sheet to enhance the clamping effect and prevent it from falling off during loading and unloading. Moreover, after the metal clamping plates are clamped, the horizontal position and height can be adjusted by the servo motor, lifting push rod, and telescopic push rod to automatically place the metal sheet on the surface of the first and second lower dies.

[0019] 3. In this automatic feeding metal stretching machine, the bottom of the clamping plate is embedded with balls. The balls roll due to friction with the feeding belt in the transmission, which does not affect the transmission of the feeding belt and prevents the bottom of the clamping plate from being worn. Therefore, it is not necessary to frequently open and close the feeding belt when clamping metal sheets, which helps to extend the service life of the feeding belt.

[0020] 4. In this automatic feeding metal stretching machine, metal sheets are placed on the surfaces of the first and second lower dies, respectively. The specific metal sheet is located inside the disc box. The chassis is driven to rotate by a micro motor. At this time, the telescopic component is limited by the transmission column, which can only move back and forth along the inside of the groove. It can only rotate out or retract into the disc box. The telescopic component rotates out synchronously from different angles inside the disc box, which helps to push the metal sheet to adjust its position. This makes the center of the metal sheet after the position adjustment coincide with the center of the first and second lower dies, so as to improve the aesthetics of the product after stretching and deformation. Moreover, the synchronous rotation of the telescopic component can adjust the position of disc-shaped metal sheets of different diameters, thereby expanding the scope of application. Attached Figure Description

[0021] Figure 1This is a front view of the first lower die of an automatic feeding metal stretching machine according to the present invention.

[0022] Figure 2 This is a front view schematic diagram of the lifting push rod structure of an automatic feeding metal stretching machine according to the present invention;

[0023] Figure 3 This is a side view of the feeding belt structure of an automatic feeding metal stretching machine according to the present invention.

[0024] Figure 4 This invention relates to an automatic feeding metal stretching machine. Figure 3 Enlarged structural diagram at point A in the middle;

[0025] Figure 5 This is a schematic diagram of the internal structure of the cylinder of an automatic feeding metal stretching machine according to the present invention.

[0026] Figure 6 This is a top view of the disc box structure of an automatic feeding metal stretching machine according to the present invention.

[0027] Figure 7 This is a top view of the internal structure of the disc box of an automatic feeding metal stretching machine according to the present invention.

[0028] Figure 8 This is a schematic diagram of the chassis and meshing gear connection structure of an automatic feeding metal stretching machine according to the present invention.

[0029] In the diagram: 1. First lower mold; 2. First electric push rod; 3. First mold sleeve; 4. Feeding belt; 5. Unloading belt; 6. Clamping assembly; 601. Lifting push rod; 602. Telescopic push rod; 603. Suction cup; 604. Miniature push rod; 605. Clamping plate; 606. Ball bearing; 607. Vacuum pump; 7. First upper mold; 8. Telescopic rod; 9. Dividing piece; 10. Cylinder body; 11. First pipe; 12. Second pipe; 13. Oil tank; 14. Second lower mold; 15. Second mold sleeve; 16. Second electric push rod; 17. Second upper mold; 18. Servo motor; 19. Auxiliary positioning assembly; 1901. Disc box; 1902. Cable groove; 1903. Chassis; 1904. Telescopic piece; 1905. Transmission column; 1906. Meshing gear; 1907. Miniature motor. Detailed Implementation

[0030] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0031] like Figure 1 , Figure 5As shown, the present invention provides a technical solution: an automatic feeding metal stretching machine, comprising a first lower die 1 and a second upper die 17. First electric push rods 2 are fixed to both sides of the first lower die 1, and a first die sleeve 3 is fixed to the top of the first electric push rods 2. A feeding belt 4 is provided on the left side of the first die sleeve 3, and a discharging belt 5 is provided on the right side of the first die sleeve 3. A clamping assembly 6 is provided between the feeding belt 4 and the discharging belt 5, and the clamping assembly 6 is located in front of the first die sleeve 3. A first upper die 7 is provided above the first lower die 1, and telescopic rods 8 are fixed to both sides of the outer wall of the first upper die 7. A dividing member 9 is fixed to the top of the telescopic rods 8, and a cylinder body 10 is provided outside the dividing member 9. The sides of the cylinder body 10... The top is connected to a first pipe 11, and the bottom side of the cylinder body 10 is connected to a second pipe 12. The ends of the first pipe 11 and the second pipe 12 are connected to an oil tank 13 through a pump body. The top of the first upper mold 7 is fixed with a second lower mold 14, and a second mold sleeve 15 is fitted on the outside of the second lower mold 14. The bottom sides of the second mold sleeve 15 are fixed with second electric push rods 16. A second upper mold 17 is set above the second lower mold 14. The first mold sleeve 3 is fitted on the outside of the first lower mold 1, and the top edge of the first lower mold 1 is chamfered. The cylinder body 10 is connected to the oil tank 13 through the first pipe 11 and the second pipe 12, and the dividing piece 9 divides the inside of the cylinder body 10 into two spaces.

[0032] The specific operation is as follows: Metal sheets are placed on the surfaces of the first lower mold 1 and the second lower mold 14, respectively. Oil is injected into the cylinder 10 through the first pipe 11 from the oil tank 13 to push the dividing member 9, causing the telescopic rod 8 to extend and carry the first upper mold 7 down. Meanwhile, the oil on the other side of the dividing member 9 returns to the oil tank 13 through the second pipe 12. During the descent of the first upper mold 7, it will press against the first mold sleeve 3. At this time, the first mold sleeve 3 will descend in conjunction with the first upper mold 7 through the first electric push rod 2, while the first lower mold 1 remains unchanged. Thus, the descent of the first upper mold 7, in conjunction with the first lower mold 1, stretches and deforms the metal sheet through the structural shape of both, thereby obtaining the first stretched product. Then, the oil tank 13 injects oil into the cylinder 10 again through the second pipe 12 to push the dividing member 9, causing the telescopic rod 8 to retract and carry the first upper mold 7 up. The oil on the other side of the dividing member 9 returns to the oil tank 13 through the first pipe 11. Inside the box 13, the second lower die 14 rises with the first upper die 7, causing the second die sleeve 15 to abut against the bottom of the second upper die 17. The second die sleeve 15 descends via the second electric push rod 16, allowing the second lower die 14 to enter the interior of the second upper die 17. Thus, the second lower die 14, in conjunction with the second upper die 17, stretches and deforms another metal sheet, thereby obtaining a second stretched product. This fully utilizes the telescopic mechanism of the telescopic rod 8, allowing for two stretches of the metal sheet in a single extension, which improves work efficiency. Furthermore, the extension and retraction of the telescopic rod 8 are achieved through oil injection, meaning the force provided by the extension and retraction of the telescopic rod 8 is consistent, ensuring that the two metal sheets are subjected to equal force. The top edges of the first lower die 1 and the second lower die 14 are chamfered to cushion the metal sheet at the start of stretching, preventing wrinkles or damage during the stretching process.

[0033] like Figures 1-4 As shown, the clamping assembly 6 includes a lifting push rod 601, a telescopic push rod 602, a suction cup 603, a micro push rod 604, a clamping plate 605, a ball bearing 606, and a vacuum pump 607. The top of the lifting push rod 601 is fixed with the telescopic push rod 602, and the bottom left end of the telescopic push rod 602 is connected to the suction cup 603. The upper part of the suction cup 603 is surrounded by micro push rods 604, and the micro push rods 604 are fixedly connected to the telescopic push rod 602. The side of the micro push rod 604 away from the suction cup 603 is provided with a clamping plate 605, and the bottom of the clamping plate 605 is embedded with a ball bearing 606. The top of the suction cup 603 is connected to the vacuum pump 607. The bottom of the lifting push rod 601 is connected to a servo motor 18. The clamping plates 605 are symmetrically distributed about the vertical central axis of the suction cup 603, and there are a total of four clamping plates 605.

[0034] The specific operation is as follows: With the camera, the servo motor 18 drives the lifting push rod 601, causing the telescopic push rod 602 to carry the suction cup 603, miniature push rod 604, and clamping plate 605 to rotate horizontally. This positions the suction cup 603 above the feeding belt 4. When the feeding belt 4 transports the metal sheet to below the suction cup 603, the lifting push rod 601 retracts, causing the suction cup 603 to descend and adhere to the surface of the metal sheet. Simultaneously, the clamping plate 605 expands to its maximum extent via the miniature push rod 604, positioning itself around the metal sheet, with its bottom abutting against the surface of the feeding belt 4. At this point, the force-bearing part of the feeding belt 4 is concave. Then, the miniature push rod 604 retracts, causing the clamping plate 605 to move and clamp the metal sheet. The vacuum pump 607 is then activated, ensuring the suction cup 603 firmly adheres to the surface of the metal sheet. The suction cup 603 is now adsorbed at the center of the metal sheet. Finally, the rotation of the servo motor 18 and the raising and lowering of the lifting push rod 601 place the clamped metal sheet into the first lower mold 1. The above operation is repeated, and during the descent of the first upper mold 7, the lifting push rod 601 is used to place another metal sheet onto the surface of the second lower mold 14 to achieve automatic feeding. The bottom of the clamping plate 605 is embedded with a ball 606, which rolls by friction with the feeding belt 4 in the transmission, thus not affecting the transmission of the feeding belt 4 and preventing the bottom of the clamping plate 605 from being worn. Therefore, it is not necessary to frequently switch the feeding belt 4 when clamping the metal sheet, which helps to extend the service life of the feeding belt 4. After the lower metal sheet is stretched into a product, when the first upper mold 7 rises and fully exposes the product, the suction cup 603 and the clamping plate 605 repeat the above operation to clamp the product and transfer it to the unloading belt 5 for unloading. After the upper metal sheet is stretched into a product, when the first upper mold 7 moves down and fully exposes the product, the suction cup 603 and the clamping plate 605 repeat the above operation to clamp the second formed product and transfer it to the unloading belt 5.

[0035] like Figure 1 , Figures 6-8As shown, the top of the first mold sleeve 3 and the second mold sleeve 15 are provided with an auxiliary positioning component 19. The auxiliary positioning component 19 is used to adjust the central axis of the metal sheet so that it coincides with the central axis of the first lower mold 1 and the second lower mold 14. The auxiliary positioning component 19 includes a disc box 1901, a groove 1902, a base 1903, a telescopic member 1904, and a transmission column 1905. The surface of the disc box 1901 is provided with a groove 1902, and the base 1903 is slidably connected to the bottom of the inner wall of the disc box 1901. The telescopic member 1904 is hinged to the surface of the base 1903. The top of the telescopic component 1904 is provided with a transmission column 1905, which passes through the wire groove 1902. The telescopic component 1904 and the transmission column 1905 are perpendicularly distributed. The auxiliary positioning component 19 also includes a meshing gear 1906 and a micro motor 1907. The side of the chassis 1903 is meshed with the meshing gear 1906, and the bottom of the meshing gear 1906 is connected to the micro motor 1907. The micro motor 1907 is fixedly connected to the disc box 1901, and the chassis 1903 is connected to the micro motor 1907 through the meshing gear 1906.

[0036] The specific operation is as follows: the metal sheet is placed on the surface of the first lower die 1 and the second lower die 14 respectively. Specifically, the metal sheet is located on the surface of the first lower die 1 and the second lower die 14, and is also located inside the disc box 1901. The micro motor 1907 drives the meshing gear 1906 to mesh with the chassis 1903 to rotate. At this time, the telescopic component 1904 is limited by the transmission column 1905, which can only move back and forth along the inside of the groove 1902. It can only rotate out or retract into the disc box 1901. The telescopic component 1904 rotates out synchronously from different angles inside the disc box 1901, which helps to push the metal sheet to further adjust its position. This makes the center of the metal sheet after the position adjustment coincide with the center of the first lower die 1 and the second lower die 14, so as to improve the aesthetics of the product after stretching and deformation. Moreover, the synchronous rotation of the telescopic component 1904 can adjust the position of disc-shaped metal sheets of different diameters, thereby expanding the scope of application.

[0037] In summary, as Figures 1-8As shown, in operation, this automatic feeding metal stretching machine first works in conjunction with a camera. The servo motor 18 drives the lifting push rod 601, causing the telescopic push rod 602 to rotate horizontally, carrying the suction cup 603, miniature push rod 604, and clamping plate 605. This positions the suction cup 603 above the feeding belt 4. When the feeding belt 4 transports the metal sheet to below the suction cup 603, the lifting push rod 601 retracts, causing the suction cup 603 to descend and adhere to the surface of the metal sheet. Simultaneously, the clamping plate 605 extends to its maximum extent via the miniature push rod 604. The expansion is located around the metal sheet, and the bottom of the clamping piece 605 abuts against the surface of the feeding strip 4. At this time, the force-bearing part of the feeding strip 4 is concave. Then the micro push rod 604 retracts, causing the clamping piece 605 to move and clamp the metal sheet. At this time, the vacuum pump 607 is started, so that the suction cup 603 is firmly attached to the surface of the metal sheet. At this time, the suction cup 603 is attached to the center of the metal sheet. Then, through the rotation of the servo motor 18 and the lifting push rod 601, the clamped metal sheet is placed on the surface of the first lower mold 1.

[0038] Then, the above operation is repeated and another metal sheet is placed on the surface of the second lower die 14 by raising the lifting push rod 601 during the descent of the first upper die 7 to achieve automatic feeding. The bottom of the clamping plate 605 is embedded with a ball 606. The ball 606 rolls by friction with the feeding belt 4 in the transmission, so as not to affect the transmission of the feeding belt 4 and to prevent the bottom of the clamping plate 605 from being worn. Therefore, it is not necessary to frequently switch the feeding belt 4 when clamping the metal sheet, which helps to extend the service life of the feeding belt 4.

[0039] Metal sheets are placed on the surfaces of the first lower mold 1 and the second lower mold 14 respectively. Specifically, the metal sheets are located on the surfaces of the first lower mold 1 and the second lower mold 14, and are also located inside the disc box 1901. The micro motor 1907 drives the meshing gear 1906 to mesh with the chassis 1903 to rotate. At this time, the telescopic member 1904 is restricted by the transmission column 1905 to only move back and forth along the inside of the groove 1902. It can only rotate out to the inside of the disc box 1901 or retract into the disc box 1901. The telescopic member 1904 rotates out synchronously from different angles inside the disc box 1901, which helps to push the metal sheet to further adjust its position, so that the center of the metal sheet after the position adjustment coincides with the center of the first lower mold 1 and the second lower mold 14.

[0040] Metal sheets are placed at the center of the surfaces of the first lower die 1 and the second lower die 14, respectively. The oil tank 13 injects oil into the cylinder 10 through the first pipe 11 to push the dividing member 9 so that the telescopic rod 8 extends to carry the first upper die 7 down. Meanwhile, the oil on the other side of the dividing member 9 returns to the oil tank 13 through the second pipe 12. During the descent of the first upper die 7, it will press against the first die sleeve 3. At this time, the first die sleeve 3 will descend in conjunction with the first upper die 7 through the first electric push rod 2, while the first lower die 1 remains unchanged. Thus, the descent of the first upper die 7, together with the first lower die 1, stretches and deforms the metal sheet through the structural shape of the two, thereby obtaining the first stretched product.

[0041] Then, the oil tank 13 injects oil into the cylinder 10 through the second pipe 12 to push the dividing member 9 so that the telescopic rod 8 retracts to carry the first upper mold 7 up. The oil on the other side of the dividing member 9 returns to the oil tank 13 through the first pipe 11. The second lower mold 14 rises with the first upper mold 7, so that the second mold sleeve 15 abuts against the bottom of the second upper mold 17. The second mold sleeve 15 descends through the second electric push rod 16 so that the second lower mold 14 can enter the second upper mold 17. Thus, the second lower mold 14 cooperates with the second upper mold 17 to stretch and deform another metal sheet, thereby obtaining the second stretched product.

[0042] After the lower metal sheet is stretched into a product, when the first upper die 7 rises and fully exposes the product, the suction cup 603 and clamping plate 605 repeat the above operation to clamp the product and transfer it to the unloading strip 5 for unloading. After the upper metal sheet is stretched into a product, when the first upper die 7 moves down and fully exposes the product, the suction cup 603 and clamping plate 605 repeat the above operation to clamp the second formed product and transfer it to the unloading strip 5.

[0043] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An automatic feeding metal stretching machine, comprising a first lower die (1) and a second upper die (17), characterized in that: The first lower mold (1) is fixed with first electric push rods (2) on both sides, and a first mold sleeve (3) is fixed to the top of the first electric push rods (2). A feeding strip (4) is provided on the left side of the first mold sleeve (3), and a feeding strip (5) is provided on the right side of the first mold sleeve (3). A clamping assembly (6) is provided between the feeding strip (4) and the feeding strip (5), and the clamping assembly (6) is located in front of the first mold sleeve (3). A first upper mold (7) is provided above the first lower mold (1), and telescopic rods (8) are fixed to both sides of the outer wall of the first upper mold (7). A dividing piece (9) is fixed to the top of the telescopic rod (8), and a cylinder (10) is provided outside the dividing piece (9). The top side of the cylinder body (10) is connected to a first pipe (11), and the bottom side of the cylinder body (10) is connected to a second pipe (12). The ends of the first pipe (11) and the second pipe (12) are connected to an oil tank (13) through a pump body. The top of the first upper mold (7) is fixed with a second lower mold (14), and a second mold sleeve (15) is fitted on the outside of the second lower mold (14). The bottom sides of the second mold sleeve (15) are fixed with second electric push rods (16). A second upper mold (17) is provided above the second lower mold (14). The first mold sleeve (3) is fitted on the outside of the first lower mold (1), and the top edge of the first lower mold (1) is chamfered. The cylinder (10) is connected to the oil tank (13) through the first pipe (11) and the second pipe (12), and the dividing piece (9) divides the interior of the cylinder (10) into two spaces; Metal sheets are placed on the surfaces of the first lower die (1) and the second lower die (14). The oil tank (13) injects oil into the cylinder (10) through the first pipe (11) to push the dividing piece (9) so that the telescopic rod (8) extends to carry the first upper die (7) down. Thus, the descent of the first upper die (7) cooperates with the first lower die (1) to stretch and deform the metal sheet. Then, the oil tank (13) injects oil into the cylinder (10) through the second pipe (12) to push the dividing piece (9) so that the telescopic rod (8) retracts to carry the first upper die (7) up. Thus, the second lower die (14) cooperates with the second upper die (17) to stretch and deform another metal sheet.

2. The automatic feeding metal stretching machine according to claim 1, characterized in that: The clamping assembly (6) includes a lifting push rod (601), a telescopic push rod (602), a suction cup (603), a micro push rod (604), a clamping plate (605), a ball bearing (606), and a vacuum pump (607). The top of the lifting push rod (601) is fixed with the telescopic push rod (602), and the bottom left end of the telescopic push rod (602) is connected to the suction cup (603). The upper part of the suction cup (603) is surrounded by micro push rods (604), and the micro push rods (604) are fixedly connected to the telescopic push rod (602). The side of the micro push rod (604) away from the suction cup (603) is provided with a clamping plate (605), and the bottom of the clamping plate (605) is embedded with a ball bearing (606). The top of the suction cup (603) is connected to the vacuum pump (607), and the bottom of the lifting push rod (601) is connected to a servo motor (18).

3. The automatic feeding metal stretching machine according to claim 2, characterized in that: The clamping pieces (605) are symmetrically distributed about the vertical central axis of the suction cup (603), and there are a total of four clamping pieces (605).

4. The automatic feeding metal stretching machine according to claim 1, characterized in that: The top of the first mold sleeve (3) and the second mold sleeve (15) are provided with auxiliary positioning components (19), and the auxiliary positioning components (19) are used to adjust the central axis of the metal sheet so that it coincides with the central axis of the first lower mold (1) and the second lower mold (14).

5. The automatic feeding metal stretching machine according to claim 4, characterized in that: The auxiliary positioning component (19) includes a disc box (1901), a wire groove (1902), a chassis (1903), a telescopic member (1904), and a transmission column (1905). The surface of the disc box (1901) is provided with a wire groove (1902), and the bottom of the inner wall of the disc box (1901) is slidably connected to the chassis (1903). The surface of the chassis (1903) is hinged with a telescopic member (1904), and the top of the telescopic member (1904) is provided with a transmission column (1905).

6. The automatic feeding metal stretching machine according to claim 5, characterized in that: The drive column (1905) passes through the groove (1902), and the telescopic member (1904) is perpendicular to the drive column (1905).

7. The automatic feeding metal stretching machine according to claim 5, characterized in that: The auxiliary positioning component (19) also includes a meshing gear (1906) and a micro motor (1907). The side of the chassis (1903) is meshed with the meshing gear (1906), and the bottom of the meshing gear (1906) is connected to the micro motor (1907).

8. The automatic feeding metal stretching machine according to claim 7, characterized in that: The micro motor (1907) is fixedly connected to the disc box (1901), and the chassis (1903) is connected to the micro motor (1907) through a meshing gear (1906).

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