Ship sheet metal machining multi-station punch forming device

Abstract

The invention relates to the technical field of sheet metal stamping, in particular to a ship sheet metal machining multi-station stamping forming device which comprises a supporting column, a top seat, a bottom die, a lifting seat and a hydraulic cylinder and further comprises a sealing assembly, a rubber wheel, a connecting assembly, a stamping die, a fixing block and a first pressing switch. The sealing assembly extends to the position below the lifting base, the stamping die is installed at the bottom of the lifting base, and the connecting assembly is installed on the lifting base. By means of the mode that the heated part is sealed in advance before the stamping part of the ship component is heated, and the stamping part is exposed before the stamping action is executed, the problems that in the prior art, when the stamping part of the ship component is preheated, heat loss is large, the multi-station stamping efficiency of ship component metal plates is low, and the stamping efficiency is low are solved. And the metal plate stamping die has the effects of being more energy-saving and environment-friendly, and meanwhile, the metal plate stamping efficiency of the ship component can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal stamping, and particularly to a multi-station stamping and forming device for ship sheet metal processing. Background Art

[0002] A large number of sheet materials and structural parts are involved in shipbuilding. These components have complex shapes, large sizes, and high precision requirements. To ensure that the strength of the components meets the design requirements, high-strength aluminum alloy forgings are mostly used for the components. In the later stage, to ensure the installation effect between adjacent ship components, secondary shaping treatment of the ship components is required. When stamping components with large sizes such as ship decks, since there are multiple stamping stations on their surfaces, a multi-station stamping and forming device for sheet metal processing is needed.

[0003] In the ship sheet metal stamping process, spring back is the phenomenon that the shape of the workpiece deviates from the mold design due to the recovery of elastic deformation after stamping. It is a key technical difficulty in sheet metal forming, directly affecting the component accuracy and assembly reliability. Since the material strength of high-strength aluminum alloy forgings is relatively high, and the ship deck has a large size and a large single stamping area. To avoid the sharp edges (right angles) of the stamping grooves forming geometric discontinuity points, which leads to a sharp increase in local stress (the stress concentration coefficient can reach 3 - 5 times), becoming the origin of fatigue cracks, it is necessary to make an arc chamfer at the edge of the stamping groove for smooth transition, reducing the stress concentration coefficient to less than 1.5 times. However, when the stamping depth is relatively shallow, the bending radius of the ship component is small, and the smaller the ratio of the bending radius to the material thickness (R / t), the more significant the spring back. To avoid the problem of low stamping accuracy caused by the deviation of the workpiece shape from the mold design after stamping due to spring back during the stamping of ship components, in the prior art, the stamping part is often pre-heated according to the material characteristics. However, it is found in the actual stamping process that to ensure heating to the appropriate temperature, the stamping part of the ship component needs to be pre-heated for a long time. And during the pre-heating process, the stamping part of the ship component is in an open state, and the large-area stamping part continuously exchanges heat with the air, and the heat will quickly dissipate. Thus, to ensure the heating temperature, the heating time needs to be extended, resulting in low efficiency of multi-station stamping of ship component sheet metal and more energy consumption.

[0004] Therefore, a multi-station stamping and forming device for ship sheet metal processing is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-station stamping forming device for sheet metal processing for ships. By sealing the heated part before heating the stamping part of the ship component and exposing the stamping part before performing the stamping action, the problem of large heat loss when preheating the stamping part of the ship component in the prior art, which leads to low efficiency of multi-station stamping of sheet metal of ship components and large energy waste, is solved. The device is more energy-saving and environmentally friendly, and can ensure the efficiency of sheet metal stamping of ship components.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A multi-station stamping and forming device for sheet metal processing for ships, comprising a pillar, a top seat, a bottom die, a lifting seat, a hydraulic cylinder, and also comprising a closing component, a rubber wheel, a connecting component, a stamping die, a fixing block, and a first pressing switch. The closing component is installed on the lifting seat, and the closing component extends to the bottom of the lifting seat, the stamping die is installed at the bottom of the lifting seat, the connecting component is installed on the lifting seat, and the connecting component is transmission-connected with the closing component, the rubber wheel is installed at the end of the connecting component, and the rotating shaft of the rubber wheel is transmission-connected with the connecting component, the fixing block and the first pressing switch are installed side by side on the closing component, a limiting groove is provided on the side wall of the pillar, a second pressing switch is installed on the top of the limiting groove, a heating coil is fitted around the stamping part of the bottom die, when the hydraulic cylinder drives the top seat to move downward, the closing component is first fitted with the bottom die, and at the same time, the rubber wheel moves downward along the limiting groove and the rubber wheel is separated from the second pressing switch, and when the rubber wheel contacts the pillar through the limiting groove, the closing component is driven to translate to both sides of the stamping die through the connecting component.

[0008] In the prior art, in order to avoid heat loss caused by heating of ship components, the heating parts can also be sealed and protected to reduce heat loss. However, after the stamping parts of the ship components are heated to a suitable temperature, the sealing protectors need to be removed from the surface of the ship components again, and the timing of removal is not easy to control. If they are removed too early, subsequent heat loss will be caused, causing the temperature of the ship components to drop too much, thereby affecting the subsequent sheet metal stamping quality. If they are removed too late, a certain amount of energy waste will be caused. For this reason, the technical solution controls the closing and translation of the sealing component according to the height correspondence of the stamping die. While achieving closed protection of the stamping parts of the ship components, it will not affect the subsequent stamping action, thereby effectively solving the problem of sheet metal springback and greatly reducing energy waste.

[0009] Preferably, the closing assembly comprises a limit rod, a heat insulation cover and a top frame, the limit rod is mounted on the lifting seat, and the bottom end of the limit rod extends below the lifting seat, the top frame is mounted on the bottom of the limit rod, and the two heat insulation covers are symmetrically mounted on the bottom of the top frame.

[0010] Preferably, both ends of the heat insulation cover are installed with limit strips, and the ends of the heat insulation cover are slidably connected to the limit strips, and the two adjacent positions on the surfaces of the heat insulation covers are installed with limit blocks, and the limit blocks are slidably fitted with the inner wall of the top frame, a cross bar is installed inside the top frame, and the cross bar passes through the limit blocks, and a sealing strip is fitted on the bottom of the heat insulation cover.

[0011] Preferably, the fixing block and the first push switch are respectively mounted on the surfaces of two heat insulation covers, and the first push switch is in an on state when the heat insulation covers are in contact with each other.

[0012] Preferably, the connecting assembly includes a fixed frame, a rotating rod and a threaded rod, the fixed frame is installed on the side wall of the lifting seat, the rotating rod is rotatably installed between the inner walls of the fixed frame through a bearing seat, and the end of the rotating rod is transmission-connected to the rotating shaft of the rubber wheel through a bevel gear set, the threaded rod is installed at the end of the rotating rod, and the threaded rod is threadedly connected to the limit bar.

[0013] Preferably, the threads opened on the outer periphery of the threaded rod threadedly connected to the same heat shield end limit strip have the same rotation direction, and the threads opened on the outer periphery of the threaded rod threadedly connected to different heat shield end limit strips have opposite rotation directions.

[0014] Preferably, a semicircular groove is provided on the edge of the heat insulation cover on one side, and a semicircular protrusion matched with the semicircular groove is provided on the edge of the heat insulation cover on the other side.

[0015] Preferably, the length of the heat shield is greater than the length of the stamping die, the spacing of the limit rods is greater than the length of the stamping die, and the horizontal movement stroke of the heat shield is greater than half of the width of the stamping die.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the present invention performs sheet metal stamping on large ship components, after the hydraulic cylinder drives the lifting seat to descend, the closing component can be fitted with the bottom mold, and then the stamping part is sealed before the heating operation is performed, thereby greatly reducing heat dissipation, thereby effectively improving the heating efficiency of large ship components, not only effectively ensuring the quality of subsequent sheet metal stamping of large ship components, but also greatly improving the sheet metal stamping efficiency of large ship components.

[0018] 2. Through the rubber wheels, connecting components, and sealing components provided, during the descent of the lifting seat, the sealing components remain in a closed state and fit with the bottom die. When the rubber wheels contact the lower half of the limiting groove and touch the support column, the rubber wheels keep rotating, thereby providing power input to the connecting components and controlling the sealing components to move towards both sides of the stamping die through the connecting components, thus exposing the stamping die. This not only reduces heat dissipation but also makes full use of the downward movement of the lifting seat to preheat large ship components, with higher time utilization efficiency, which helps to further improve the sheet metal stamping efficiency of large ship components.

[0019] 3. Through the fixed blocks, first pressure switches, limiting grooves, and second pressure switches provided, when the hydraulic cylinder just starts to extend, the rubber wheels separate from the second pressure switch, thereby turning on the power supply of the heating coil. During this process, the stamping parts of the ship components are fully heated by the heating coil. When the rubber wheels contact the support column through the limiting groove, the rubber wheels rotate and drive the sealing components to move towards both sides of the stamping die through the connecting components. After the fixed blocks separate from the first pressure switch, the power supply of the heating coil is quickly turned off, thereby further reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the structure of the lifting seat of the present invention;

[0022] Figure 3 is a sectional view of the lifting seat of the present invention;

[0023] Figure 4 is a schematic diagram of the structure of the support column of the present invention;

[0024] Figure 5 is a schematic diagram of the structure of the sealing components, fixed blocks, and first pressure switches of the present invention;

[0025] Figure 6 is a sectional view of the heat insulation cover of the present invention;

[0026] Figure 7 is a schematic diagram of the structure of the connecting components of the present invention;

[0027] Figure 8 of the present invention Figure 1 is an enlarged view of the structure at A in

[0028] In the figure: 1, support pillar; 2, top seat; 3, bottom mold; 31, heating coil; 4, lifting seat; 5, hydraulic cylinder; 6, sealing component; 61, limiting rod; 62, heat insulation cover; 621, limiting strip; 622, limiting block; 623, cross bar; 624, sealing strip; 63, top frame; 7, rubber wheel; 8, connecting component; 81, fixed frame; 82, rotating rod; 83, threaded rod; 9, stamping die; 10, fixed block; 11, first push switch; 12, limiting groove; 13, second push switch. Detailed implementation manner

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1 to 8 , the present invention provides a multi-station stamping and forming device for ship sheet metal processing, and the technical solution is as follows:

[0031] Refer to Figure 1 , Figure 2 , Figure 4 and Figure 5A multi-station stamping and forming device for sheet metal processing for ships, comprising a pillar 1, a top seat 2, a bottom die 3, a lifting seat 4, and a hydraulic cylinder 5. The pillars 1 are arranged in four pieces and are arranged in a rectangular array on the concrete floor of the stamping workshop. The top seat 2 is horizontally arranged between the tops of the four pillars 1. The bottom die 3 is embedded in the concrete floor, and the bottom die 3 is located between the four pillars 1. A groove for stamping and forming is provided on the surface of the bottom die 3. The lifting seat 4 is arranged below the top seat 2. The hydraulic cylinders 5 are arranged in three pieces and are all arranged in the top seat 2. The bottom of the hydraulic cylinder 5 is fixedly connected to the top of the lifting seat 4, and is used to drive the lifting seat 4. The hydraulic cylinder 5 moves up and down. When the hydraulic cylinder 5 is extended, the lifting seat 4 is driven to move downward, and then the sheet metal stamping operation is performed. When the hydraulic cylinder 5 is contracted, the lifting seat 4 is driven to move upward and reset to the highest point; it also includes a closing component 6, a rubber wheel 7, a connecting component 8, a stamping die 9, a fixing block 10, and a first press switch 11. The closing component 6 is installed on the lifting seat 4, and the closing component 6 extends to the bottom of the lifting seat 4. When the lifting seat 4 is at the highest point, the top of the closing component 6 extends to the inside of the top seat 2. The stamping die 9 is installed at the bottom of the lifting seat 4. In the initial state, the stamping die 9 is located above the closing component 6; the connecting component 8 is installed on the lifting seat 4 , and the connecting component 8 is transmission-connected with the closing component 6, the rubber wheel 7 is installed at the end of the connecting component 8, and the rotating shaft of the rubber wheel 7 is transmission-connected with the connecting component 8, the fixing block 10 and the first push switch 11 are installed side by side on the closing component 6, and the side wall of the pillar 1 is provided with a limiting groove 12, and the limiting groove 12 is divided into an upper and a lower part, the upper part is deeper, and the lower part is shallower. When the rubber wheel 7 moves down to a certain height with the lifting seat 4, it contacts with the pillar 1 through the lower part, and then in the subsequent process of the rubber wheel 7 continuing to move down, the rubber wheel 7 will keep rotating, thereby providing power for the connecting component 8. At the same time, when the rubber wheel 7 moves down with the lifting seat 4, the rubber wheel 7 will keep rotating, thereby providing power for the connecting component 8. When the lowering seat 4 moves down to the set height, it means that the distance between the stamping die 9 and the ship component on the surface of the bottom die 3 is reduced. At this time, it is necessary to use the power input of the rubber wheel 7 to drive the closing component 6 to move to both sides of the stamping die 9, thereby exposing the stamping die 9 to ensure smooth contact between the subsequent stamping die 9 and the ship component; a second push switch 13 is installed on the top of the limit groove 12, and a heating coil 31 is installed around the stamping part of the bottom die 3. The first push switch 11 and the second push switch 13 are connected to the heating coil 31 in series. The second push switch 13 is in a disconnected state when it is pressed, that is, in the initial state, refer to Figure 8, the rubber wheel 7 contacts the second pressing switch 13. At this time, the heating coil 31 is in a power-off state. When the hydraulic cylinder 5 just controls the lifting seat 4 and the rubber wheel 7 to move downward, the second pressing switch 13 loses the extrusion of the rubber wheel 7 and switches to the on state. When the hydraulic cylinder 5 drives the top seat 2 to move downward, the closing assembly 6 first fits with the bottom die 3. At the same time, the rubber wheel 7 moves downward along the limiting groove 12 and the rubber wheel 7 separates from the second pressing switch 13. When the rubber wheel 7 contacts the support column 1 through the limiting groove 12, it drives the closing assembly 6 to translate toward both sides of the stamping die 9 through the connecting assembly 8. At this time, the power supply of the heating coil 31 is disconnected again through the closing assembly 6. When the lifting seat 4 continues to move downward, it drives the stamping die 9 to contact the ship component placed on the surface of the bottom die 3, and then completes the sheet metal stamping operation of multiple stations simultaneously.

[0032] Refer to Figure 3 and Figure 5 , as an implementation manner of the present invention, specifically, the closing assembly 6 includes a limiting rod 61, a heat insulation cover 62 and a top frame 63. The limiting rod 61 is installed on the lifting seat 4, and the bottom end of the limiting rod 61 extends below the lifting seat 4. The limiting rod 61 is composed of a limiting cylinder and a round rod, and the round rod is limited and slidable within the inner circumference of the limiting cylinder. The top frame 63 is installed at the bottom of the limiting rod 61, and two heat insulation covers 62 are symmetrically installed at the bottom of the top frame 63. The edges of the heat insulation covers 62 are in contact with each other in the initial state, forming a cuboid-shaped groove inside the heat insulation covers 62. When the bottom of the heat insulation cover 62 fits with the surface of the ship component, the stamping part of the ship component can be closed, thereby reducing heat dissipation and ensuring the heating efficiency of the heating coil 31. When the heat insulation cover 62 contacts the ship component, as the lifting seat 4 continues to move downward, the round rod will move deeper into the limiting cylinder, thereby adapting to the height change of the lifting seat 4.

[0033] Refer to Figure 5 and Figure 6 , as an implementation manner of the present invention, specifically, limiting strips 621 are installed at both ends of the heat insulation cover 62, and the end of the heat insulation cover 62 is slidably connected to the limiting strip 621. The limiting strip 621 is provided with a telescopic structure, and the total length can be changed. When the lifting seat 4 continues to move downward after the bottom of the heat insulation cover 62 fits with the surface of the ship component, the total length of the limiting strip 621 decreases, thereby ensuring that during the continuous downward movement of the rubber wheel 7, the limiting strip 621 can also be controlled to move horizontally through the connecting assembly 8. Limiting blocks 622 are installed at adjacent positions on the surfaces of the two heat insulation covers 62, and the limiting blocks 622 are slidably fitted with the inner wall of the top frame 63. A cross bar 623 is installed inside the top frame 63, and the cross bar 623 penetrates through the limiting block 622. A sealing strip 624 is attached to the bottom of the heat insulation cover 62. The sealing strip 624 has a certain high temperature resistance, and the specific material of the sealing strip 624 is selected according to the preheating temperature of the metal material used for the ship component. Under the action of the cross bar 623 and the limiting block 622, the horizontal movement of the heat insulation cover 62 can be further restricted.

[0034] Reference Figure 5 As an embodiment of the present invention, specifically, the fixing block 10 and the first push switch 11 are respectively installed on the surfaces of the two heat insulation covers 62, and when the heat insulation covers 62 are in contact with each other, the first push switch 11 is squeezed by the fixing block 10 and is in an on state. When the heat insulation covers 62 are away from each other, the fixing block 10 is separated from the first push switch 11. At this time, the first push switch 11 is in an off state, thereby disconnecting the power supply of the heating coil 31. When the heat insulation covers 62 are moved to both sides of the stamping die 9, the stamping die 9 contacts the stamping part of the surface of the ship component, thereby completing the stamping operation, thereby reducing the energy loss in this process.

[0035] Reference Figure 5 and Figure 7 As an embodiment of the present invention, specifically, the connecting assembly 8 includes a fixed frame 81, a rotating rod 82 and a threaded rod 83. The fixed frame 81 is installed on the side wall of the lifting seat 4. The rotating rod 82 is rotatably installed between the inner walls of the fixed frame 81 through a bearing seat, and the end of the rotating rod 82 is connected to the rotating shaft of the rubber wheel 7 through a bevel gear set. The ends of the rotating rod 82 and the ends of the rotating shaft of the rubber wheel 7 are both equipped with bevel gears. When the rubber wheel 7 rotates, the rotating rod 82 is driven to rotate through the bevel gear set. The threaded rod 83 is installed at the end of the rotating rod 82, and the threaded rod 83 is threaded with the limit bar 621. The threaded rod 83 is threadedly connected to the limit strip 621 at the end of the same heat insulation cover 62, and the threaded direction of the threaded rod 83 threadedly connected to the limit strip 621 at the end of different heat insulation covers 62 is opposite. When the threaded rod 83 rotates together with the rotating rod 82, the limit strip 621 threadedly connected thereto moves in the corresponding direction, thereby driving the heat insulation cover 62 to move in the corresponding direction. When the lifting seat 4 moves downward, the heat insulation cover 62 moves horizontally to the side away from the upper stamping die 9. When the lifting seat 4 moves upward, the heat insulation cover 62 moves horizontally to the side close to the upper stamping die 9.

[0036] Reference Figure 6 As an embodiment of the present invention, specifically, a semicircular groove is provided on the edge of the heat insulation cover 62 on one side, and a semicircular protrusion adapted to the semicircular groove is provided on the edge of the heat insulation cover 62 on the other side. Under the action of the semicircular groove and the semicircular protrusion, the sealing effect between the heat insulation cover 62 can be improved, and the heat loss of the heating coil 31 can be further reduced.

[0037] Reference Figure 2 and Figure 3, as an embodiment of the present invention, specifically, the length of the heat shield 62 is greater than the length of the stamping die 9, the spacing between the limiting rods 61 is greater than the length of the stamping die 9, and the horizontal movement stroke of the heat shield 62 is greater than half of the width of the stamping die 9. When the heat shield 62 moves horizontally to the maximum stroke position, the heat shield 62 can be located on both sides of the stamping die 9, thereby ensuring that the stamping die 9 can contact the ship component.

[0038] Working principle: After moving the ship component onto the surface of the bottom die 3, first start the hydraulic cylinder 5. When the hydraulic cylinder 5 extends, it first drives the second pressing switch 13 to separate from the rubber wheel 7, thereby making the second pressing switch 13 in the on state. At this time, since the heat shields 62 in the sealing assembly 6 are in contact with each other, that is, the first pressing switch 11 is also in the on state under the extrusion of the fixed block 10, thereby turning on the power supply of the heating coil 31. As the hydraulic cylinder 5 continues to extend, the sealing assembly 6 contacts the surface of the ship component prior to the stamping die 9, and the stamping part of the sheet metal of the ship component is sealed by the sealing assembly 6 to avoid heat dissipation, thereby ensuring the heating efficiency of the ship component. During this process, the rubber wheel 7 moves downward with the lifting seat 4 but does not contact the support column 1. During the subsequent continued downward movement, the rubber wheel 7 contacts the lower part of the limiting groove 12, and then the rubber wheel 7 will rotate. At this time, the ship component has been fully heated. At this time, the rotation of the rubber wheel 7 provides power input to the connection assembly 8, and then the connection assembly 8 drives the sealing assembly 6 to move to both sides of the stamping die 9. When the sealing assembly 6 moves to both sides of the stamping die 9, the lifting seat 4 drops to the lowest point, and the stamping die 9 contacts the stamping part of the sheet metal of the heated ship component, thereby effectively avoiding the phenomenon of sheet metal springback and ensuring the multi-station stamping quality of the sheet metal of the ship component;

[0039] During the subsequent continued downward movement after the rubber wheel 7 contacts the side wall of the support column 1, the limiting strip 621 contracts as the rubber wheel 7 moves downward. The rubber wheel 7 remains in a rotating state when moving downward. Then, the rotating shaft of the rubber wheel 7 drives the rotating rod 82 and the threaded rod 83 to rotate through the bevel gear set. The limiting strips 621 connected to the two heat shields 62 move toward the side walls of the corresponding rubber wheels 7, thereby separating the two heat shields 62. At this time, the fixed block 10 and the first pressing switch 11 are also separated synchronously when the heat shields 62 are separated. Then, the first pressing switch 11 switches to the off state due to the loss of the extrusion of the fixed block 10, thereby disconnecting the power supply of the heating coil 31. When the heat shields 62 move to both sides of the stamping die 9, the stamping die 9 contacts the heated part of the ship component to complete the sheet metal stamping operation;

[0040] After stamping is completed, the hydraulic cylinder 5 contracts, and the lifting seat 4 drives the stamping die 9 and the rubber wheel 7 to move upward together. At this time, the heat shield 62 still remains in contact with the surface of the ship component. When the rubber wheel 7 moves upward and contacts the lower part of the limit groove 12, the reverse drive rotates the rotating rod 82 and the threaded rod 83. Then, after the stamping die 9 moves above the heat shield 62, the heat shields 62 approach each other until the lifting seat 4 rises to the initial position. At this time, the rubber wheel 7 presses the second push switch 13 to disconnect the power supply of the heating coil 31. After the ship component after sheet metal stamping is removed from the surface of the bottom die 3, a new ship component to be sheet metal stamped is placed on the surface of the bottom die 3, and the above operations are repeated.

[0041] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-station stamping and forming device for ship sheet metal processing, comprising a support column (1), a top seat (2), a bottom die (3), a lifting seat (4), and a hydraulic cylinder (5), characterized in that: It further includes a closing component (6), a rubber wheel (7), a connecting component (8), a stamping die (9), a fixing block (10), and a first push switch (11). The closing component (6) is installed on the lifting seat (4), and the closing component (6) extends below the lifting seat (4). The stamping die (9) is installed at the bottom of the lifting seat (4). The connecting component (8) is installed on the lifting seat (4), and the connecting component (8) is in transmission connection with the closing component (6). The rubber wheel (7) is installed at the end of the connecting component (8), and the rotating shaft of the rubber wheel (7) is in transmission connection with the connecting component (8). The fixing block (10) and the first push switch (11) are installed side by side on the closing component (6). A limiting groove (12) is formed on the side wall of the support column (1), and a second push switch (13) is installed at the top of the limiting groove (12). Heating coils (31) are fitted around the stamping part of the bottom die (3). When the hydraulic cylinder (5) drives the top seat (2) to move downward, the closing component (6) first fits with the bottom die (3). At the same time, the rubber wheel (7) moves downward along the limiting groove (12) and the rubber wheel (7) separates from the second push switch (13). When the rubber wheel (7) contacts the support column (1) through the limiting groove (12), the closing component (6) is driven by the connecting component (8) to translate toward both sides of the stamping die (9).

2. The multi-station stamping and forming device for ship sheet metal processing according to claim 1, wherein: The closing component (6) includes a limiting rod (61), a heat insulation cover (62), and a top frame (63). The limiting rod (61) is installed on the lifting seat (4), and the bottom end of the limiting rod (61) extends below the lifting seat (4). The top frame (63) is installed at the bottom of the limiting rod (61). Two heat insulation covers (62) are symmetrically installed at the bottom of the top frame (63).

3. The multi-station stamping and forming device for ship sheet metal processing according to claim 2, wherein: Limit strips (621) are installed at both ends of the heat insulation cover (62), and the end of the heat insulation cover (62) is slidably connected to the limit strip (621). Limiting blocks (622) are installed at adjacent positions on the surfaces of the two heat insulation covers (62), and the limiting blocks (622) are slidably fitted with the inner wall of the top frame (63). A cross bar (623) is installed inside the top frame (63), and the cross bar (623) passes through the limiting block (622). A sealing strip (624) is attached to the bottom of the heat insulation cover (62).

4. The multi-station stamping and forming device for ship sheet metal processing according to claim 3, wherein: The fixing block (10) and the first push switch (11) are respectively installed on the surfaces of the two heat insulation covers (62). When the heat insulation covers (62) are fitted together, the first push switch (11) is pressed by the fixing block (10) and is in the on state.

5. The multi-station stamping forming device for ship sheet metal processing according to claim 4, wherein: The connecting component (8) includes a fixing frame (81), a rotating rod (82), and a threaded rod (83). The fixing frame (81) is installed on the side wall of the lifting seat (4). The rotating rod (82) is rotatably installed between the inner walls of the fixing frame (81) through a bearing seat, and the end of the rotating rod (82) is in transmission connection with the rotating shaft of the rubber wheel (7) through a bevel gear set. The threaded rod (83) is installed at the end of the rotating rod (82), and the threaded rod (83) is in threaded connection with the limit strip (621).

6. The multi-station stamping forming device for ship sheet metal processing according to claim 5, characterized in that: The screw threads formed on the outer circumferences of the threaded rods (83) threadedly connected to the end limiting strips (621) of the same heat shield (62) have the same helix direction, and the screw threads formed on the outer circumferences of the threaded rods (83) threadedly connected to the end limiting strips (621) of different heat shields (62) have opposite helix directions.

7. The multi-station stamping and forming device for ship sheet metal processing according to claim 6, characterized in that: A semi-circular groove is formed on the edge of the heat shield (62) on one side, and a semi-circular protrusion adapted to the semi-circular groove is provided on the edge of the heat shield (62) on the other side.

8. The multi-station stamping and forming device for ship sheet metal processing according to claim 2, characterized in that: The length of the heat shield (62) is greater than the length of the stamping die (9), the distance between the limiting rods (61) is greater than the length of the stamping die (9), and the horizontal movement stroke of the heat shield (62) is greater than half of the width of the stamping die (9).

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