Automatic loading and unloading device for chain plate heating and bending

CN122254288APending Publication Date: 2026-06-23ANHUI HUANGSHAN HENGJIU CHAIN TRANSMISSION CO LTD
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Patent Information

Application Number
CN202610540785.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-22
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In the current chain plate processing, manual loading and unloading is labor-intensive and costly, and the loading and unloading time and efficiency are greatly affected by the worker's operation.

Method used

Design an automatic loading and unloading device for heated and bent chain plates, including a loading component, an unloading component, and a transfer component. The loading and unloading of the chain plates are realized by the pushing component and the unloading component. The position of the chain plates is stabilized by the limiting component, and the transfer component ensures accurate delivery.

Benefits of technology

It reduces manual intervention, lowers labor intensity, improves loading and unloading efficiency and positioning accuracy, and ensures operational safety.

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Abstract

The application discloses a kind of automatic loading and unloading devices of chain plate heating bending, belong to chain plate processing field.The device includes feeding assembly, unloading assembly and transfer assembly, feeding assembly is provided with multiple feeding tables with feeding table, feeding table is rotatably arranged on the surface of base, the surface of feeding table limits chain plate position, and then multiple chain plates can be placed on the surface of single feeding table, when the chain plate on the surface of single position feeding table is pushed by pushing assembly, chain plate can be placed on other feeding table position manually, workers can intermittently carry chain plate, and the labor intensity is relatively lower, simultaneously, chain plate feeding is directly controlled by pushing assembly, and the chain plate feeding demand time is easy to control;And setting unloading assembly sliding on the surface of base, the chain plate after bending is directly unloaded by pushing unloading assembly, without manual removal, realize the automatic unloading of chain plate after bending, reduce the manual intervention link, reduce worker labor intensity and guarantee to maintain chain plate conveying demand time.
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Description

Technical Field

[0001] This invention relates to the field of chain plate processing, and in particular to an automatic loading and unloading device for heating and bending chain plates. Background Technology

[0002] During the chain plate bending process, the chain plate to be processed needs to be conveyed to the surface of the bending machine and the bent chain plate is unloaded. The existing chain plate bending loading and unloading methods mainly rely on manual operation and simple mechanical devices that drive the chain plate to move.

[0003] When manually loading and unloading, workers need to manually place the chain plate onto the bending die and remove it after bending. This method requires workers to perform a single operation repeatedly for a long time, resulting in high labor intensity and labor costs. At the same time, manual operation is easily affected by the worker's skill level and fatigue, which can affect the placement of the chain plate and prolong the conveying time. When using a loading and unloading method that uses a chain plate moving structure in conjunction with a simple mechanical device, the loading position and the transfer of the chain plate need to be synchronized. The loading position requires long-term operation by workers, and the workers at the loading position and the bending machine position need to cooperate, making it difficult to ensure efficient synchronous operation of both.

[0004] In summary, in the existing technology, when loading and unloading chain plates are done manually and using simple conveying devices, the conveying time is affected by the manual operation and coordination of multiple people. Summary of the Invention

[0005] This invention provides an automatic loading and unloading device for heated and bent chain plates, which can solve the problem in the prior art where loading and unloading of chain plates is done manually and by simple conveying devices, and the conveying time is affected by manual operation and coordination.

[0006] An automatic loading and unloading device for heating and bending chain plates includes a base, on the surface of which a conveying mechanism and a bending mechanism are fixedly disposed. The conveying mechanism includes: The feeding assembly includes a feeding platform rotatably disposed on the surface of a base. A plurality of discharging platforms are fixedly connected to the surface of the feeding platform. The position of the chain plate is limited by a limiting component on the surface of the discharging platform. A pushing component is slidably connected to the surface of the base. A through groove is opened on the surface of the feeding platform. The pushing component is slidably disposed inside the through groove. A material unloading assembly is slidably disposed on the surface of the base, and the material unloading assembly is slidably disposed inside the bending mechanism; A transfer component is rotatably mounted on the surface of the base. The transfer component is used to move the feeding component out of the chain plate into the bending mechanism.

[0007] Optionally, the cross-section of the feeding platform is L-shaped, and the limiting component includes two limiting plates slidably disposed on the surface of the feeding platform. A protruding ring is fixedly connected to the surface of the limiting plate, and a sliding groove is opened on the surface of the feeding platform. The protruding ring is adapted to the sliding groove, and a limiting ring is slidably connected to the surface of each limiting plate.

[0008] Optionally, a limiting rod is rotatably connected to the surface of the limiting plate, and the limiting rod is threadedly connected to a limiting ring; a bidirectional lead screw is rotatably connected to the surface of the feeding table, and the bidirectional lead screw is threadedly connected to the limiting plate.

[0009] Optionally, the bending mechanism includes a bending die and a power execution and transmission device; the base includes a stamping machine frame; the bending die is fixedly mounted on the surface of the stamping machine frame; the bending die and the unloading table are spatially perpendicular to each other; the transfer component includes a robotic arm.

[0010] Optionally, the pushing assembly includes a pushing block slidably disposed on the surface of the base, the pushing block being adapted to the through groove, and the cross-section of the pushing block being T-shaped; the surface of the limiting ring is provided with an inner groove, and the inner groove is adapted to the pushing block.

[0011] Optionally, the unloading assembly includes an unloading rod slidably disposed on the surface of the base, the unloading rod being slidably disposed on the surface of the bending die, and an unloading platform being fixedly disposed on the surface of the base, the unloading platform being inclinedly disposed on the surface of the base.

[0012] Optionally, a passive rod is rotatably connected to the surface of the base, the rotation center of the passive rod is located on the edge extension line of the bending die, a driving column is fixedly connected to the surface of the unloading rod, and the projection of the driving column toward the passive rod covers part of the passive rod; a tension spring is provided between the passive rod and the unloading rod.

[0013] Optionally, a push cylinder is slidably connected inside the base, and the end of the piston rod inside the push cylinder is fixedly connected to the push block. A discharge cylinder is fixedly connected to the surface of the base, and the end of the piston rod inside the discharge cylinder is fixedly connected to the discharge rod.

[0014] Optionally, a transfer block is slidably connected to the surface of the base, the tension spring is fixedly disposed between the transfer block and the passive rod, a protruding column is fixedly connected to the surface of the transfer block, and a drive groove is opened on the side of the unloading rod near the transfer block, the drive groove being adapted to the protruding column.

[0015] Optionally, a central rod is fixedly connected to the surface of the base, a nut is threaded onto the surface of the central rod, and several adjustment grooves are formed on the surface of the passive rod, the adjustment grooves being adapted to the central rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The device includes a feeding assembly, an unloading assembly, and a transfer assembly. The feeding assembly features a feeding platform with multiple feeding stations, which are rotatably mounted on the base surface. The feeding platform surface defines the position of the chain plates, allowing multiple chain plates to be placed on a single feeding platform surface. When a chain plate on a single feeding platform surface is pushed by a pushing assembly, chain plates can be manually placed at other feeding platform positions. Workers can intermittently move chain plates, resulting in relatively low labor intensity. Furthermore, the feeding of chain plates is directly controlled by the pushing assembly, facilitating control over the feeding time. An unloading assembly sliding on the base surface is located at the bending mechanism position. This sliding assembly allows for direct unloading of the bent chain plates without manual removal, achieving automatic unloading and reducing manual intervention. Additionally, the device includes a transfer assembly positioned between the conveying mechanism and the bending mechanism. This transfer assembly receives the chain plates pushed by the pushing assembly and accurately transports them into the bending mechanism, ensuring the positional accuracy of the chain plates during transfer and preventing bending quality issues caused by positional deviations. Two opposing limiting plates are installed on the surface of the feeding platform, and a sliding protruding ring is set on the surface of each limiting plate. Through the L-shaped feeding platform, limiting plates, and protruding rings, a rectangular space can be formed on the surface of the feeding platform, thereby stabilizing and limiting the position of the chain plate on the surface of the feeding platform. At the same time, the surface of the protruding ring is provided with an inner groove, which provides space for the chain plate to slide. A dual pushing structure of sliding unloading rod and rotating driven rod is set, and the unloading rod and driven rod are linked. When the unloading rod pushes the material back to its original position, it drives the driven rod to rotate, ensuring that the bent chain plate can be pushed to the surface of the unloading platform. Unloading is carried out directly through the unloading rod and the driven rod, avoiding the operator's contact with the stamping machine and the bent chain plate, further improving the operational safety. Attached Figure Description

[0017] Figure 1 A schematic diagram of an automatic loading and unloading device for heating and bending chain plates provided by the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the feeding assembly provided by the present invention; Figure 3 A perspective view of the unloading assembly structure provided by the present invention; Figure 4 This is a three-dimensional cross-sectional view of the transfer block provided by the present invention; Figure 5 Provided by the present invention Figure 4 Enlarged view of the local structure at point A in the middle.

[0018] Explanation of reference numerals in the attached figures: 1. Chain plate; 2. Base; 31. Loading platform; 32. Discharging platform; 33. Through-pass trough; 41. Material limiting plate; 42. Protruding ring; 43. Limiting ring; 44. Limiting rod; 45. Two-way lead screw; 51. Inner recess; 52. Push block; 61. Unloading rod; 62. Unloading platform; 63. Passive rod; 64. Driving column; 65. Tension spring; 66. Transfer block; 67. Protruding column; 68. Center rod; 69. Bending die. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] like Figures 1 to 5 As shown in the figure, an automatic loading and unloading device for heating and bending chain plates provided in this embodiment of the invention includes a base 2. A material conveying mechanism and a bending mechanism are fixedly disposed on the surface of the base 2. The material conveying mechanism includes: The feeding assembly includes a feeding platform 31 rotatably mounted on the surface of the base 2. A plurality of discharging platforms 32 are fixedly connected to the surface of the feeding platform 31. The position of the chain plate 1 is limited by a limiting component on the surface of the discharging platform 32. A pushing component is slidably connected to the surface of the base 2. The pushing component is located in the middle of the feeding platform 31 and passes through the feeding platform 31. A through groove 33 is opened on the surface of the feeding platform 31. The pushing component is slidably mounted inside the through groove 33. like Figure 2 As shown, a motor is fixedly connected to the surface of the base 2. The motor is electrically connected to an external power source, and the end of the motor output shaft is fixedly connected to the loading platform 31. The motor is a conventional component in the relevant technical field, and those skilled in the art can select it according to actual needs. A material unloading assembly is slidably disposed on the surface of the base 2, and the material unloading assembly is slidably disposed inside the bending mechanism; The transfer component, which is rotatably mounted on the surface of the base 2, is used to move the feeding component out of the chain plate 1 into the bending mechanism. In summary, the automatic loading and unloading device for heating and bending chain plates provided by this invention includes a loading assembly, an unloading assembly, and a transfer assembly. The loading assembly is provided with a loading platform 31 having multiple feeding tables 32. The loading platform 31 is rotatably mounted on the surface of the base 2, and the surface of the loading platform 31 defines the position of the chain plates 1. Thus, multiple chain plates 1 can be placed on the surface of a single loading platform 31. When the chain plate 1 on the surface of a single loading platform 31 is pushed by the pushing assembly, the chain plate 1 can be manually placed at other loading platform 31 positions. Workers can intermittently move the chain plates 1, resulting in relatively low labor intensity. At the same time, the chain plates 1... The feeding is directly controlled by the pushing component, which facilitates the control of the feeding time of the chain plate 1. The bending mechanism is equipped with a unloading component that slides on the surface of the base 2. The sliding unloading component can push the bent chain plate 1 to be unloaded directly without manual removal, realizing automatic unloading of the bent chain plate 1 and reducing manual intervention. In addition, the device also includes a transfer component, which is set between the conveying mechanism and the bending mechanism. It is used to receive the chain plate 1 pushed by the pushing component and accurately transport it into the bending mechanism, ensuring the positional accuracy of the chain plate 1 during the transfer process and avoiding the impact of positional deviation on the bending quality. In some specific embodiments, the feeding platform 32 has an L-shaped cross-section. The limiting component includes two limiting plates 41 slidably disposed on the surface of the feeding platform 32. A protruding ring 42 is fixedly connected to the surface of the limiting plate 41. A sliding groove is formed on the surface of the feeding platform 32, and the protruding ring 42 is adapted to the sliding groove. Limiting rings 43 are slidably connected to the surface of each limiting plate 41. The limiting plate 41 is rotatably connected to a limiting rod 44, which is threadedly connected to a limiting ring 43; the feeding platform 32 is rotatably connected to a bidirectional lead screw 45, which is threadedly connected to the limiting plate 41. Rotating the bidirectional lead screw 45 causes the two limiting plates 41 to slide relative to each other on the surface of the feeding table 32, so that the space between the limiting plates 41 contacts both sides of the chain plate 1 to be bent. Then, rotating the limiting rod 44 causes the limiting ring 43 to slide, so that the limiting ring 43 contacts the other side of the chain plate 1 to be bent. One side of the feeding table 32, the limiting plates 41 and the limiting ring 43 form a rectangular space on the surface of the feeding table 31, which limits the position of the chain plate 1 on the surface of the feeding table 32. like Figure 2 As shown, a through rod is fixedly connected to the surface of the feeding platform 32, and the limiting plate 41 is slidably disposed on the surface of the through rod; In some specific implementations, the bending mechanism includes a bending die 69 and a power execution and transmission device; the base 2 includes a press frame; the bending die 69 is fixedly mounted on the surface of the press frame; the unloading assembly is slidably mounted on the surface of the press frame; the bending die 69 and the unloading table 32 are spatially perpendicular to each other; the power execution and transmission device includes a power source, a transmission mechanism, a slider, and auxiliary components; the power source transmits motion to the slider through the transmission mechanism; the slider completes the stamping action with the cooperation of the auxiliary components; the power execution and transmission device and the press frame constitute a press. In some specific implementations, a material placement plate and an induction heater are fixedly connected to the surface of the base 2. The material placement plate is used to place the chain plate 1, and the induction coil of the induction heater is sleeved on the surface of the material placement plate. It should be noted that the induction heater is an industrial heating device that uses the principle of electromagnetic induction to convert electrical energy into heat energy. Its core principle is to generate an alternating magnetic field in the induction coil through alternating current, so that eddy currents are generated inside the metal workpiece placed in the magnetic field, and then the workpiece is heated by resistance to achieve rapid heating. The induction heater is a conventional component in the relevant technical field, and those skilled in the art can select it according to actual needs. In some specific implementations, the transfer component includes a robotic arm disposed between the material placement plate and the bending die 69; The robotic arm places the chain plate 1 to be bent on the surface of the material plate onto the surface of the bending mold 69. After bending, the material is unloaded through the unloading fixture. The stamping machine and the robotic arm are electrically connected to an external power source. Both the robotic arm and the stamping machine are conventional components in the relevant technical field, and those skilled in the art can select them according to actual needs. In some specific implementations, the pushing assembly includes a pushing block 52 slidably disposed on the surface of the base 2, the pushing block 52 being adapted to the through groove 33, and the cross-section of the pushing block 52 being T-shaped; the surface of the limiting ring 43 is provided with an inner groove 51, and the inner groove 51 is adapted to the pushing block 52. like Figure 2 As shown, a push cylinder is slidably connected inside the base 2, and the end of the piston rod inside the push cylinder is fixedly connected to the push block 52; By pushing the cylinder, the pusher block 52 can be slid onto the surface of the feeding platform 32. The pusher block 52 passes through the through groove 33 and pushes the single chain plate 1 through the recessed groove 51 and slides towards the feeding plate. When the pusher block 52 slides to a certain position, since its cross-section is T-shaped, the pusher block 52 can no longer slide into the feeding platform 32. The cylinder can then be controlled to move it backward. When the pusher block 52 is completely separated from the chain plate 1, the chain plates 1 accumulated on the surface of the feeding platform 32 will move down under the action of gravity, and the single chain plate 1 will cover the through groove 33. In some specific implementations, the unloading assembly includes an unloading rod 61 slidably disposed on the surface of the base 2, the unloading rod 61 being slidably disposed on the surface of the bending die 69, and an unloading platform 62 being fixedly disposed on the surface of the base 2, the unloading platform 62 being inclinedly disposed on the surface of the base 2. like Figure 3 As shown, a passive rod 63 is rotatably connected to the surface of the base 2. The rotation center of the passive rod 63 is located on the edge extension line of the bending die 69. A driving column 64 is fixedly connected to the surface of the unloading rod 61. The projection of the driving column 64 toward the passive rod 63 covers part of the passive rod 63. A tension spring 65 is provided between the passive rod 63 and the unloading rod 61. like Figure 4 and Figure 5 As shown, a transfer block 66 is slidably connected to the surface of the base 2, and a tension spring 65 is fixedly disposed between the transfer block 66 and the passive rod 63. A protruding column 67 is fixedly connected to the surface of the transfer block 66, and a drive groove is provided on the side of the unloading rod 61 near the transfer block 66. The drive groove is adapted to the protruding column 67. The driving groove includes an arc-shaped groove and a rectangular groove, the arc-shaped groove and the rectangular groove are connected, and the distance between the arc-shaped groove and the passive rod 63 is less than the distance between the rectangular groove and the passive rod 63; like Figure 3 and Figure 4 As shown, a central rod 68 is fixedly connected to the surface of the base 2, and a nut is threaded onto the surface of the central rod 68. Several adjustment grooves are provided on the surface of the passive rod 63, and the adjustment grooves are adapted to the central rod 68. After the chain plate 1 to be bent is bent on the surface of the bending die 69, the unloading rod 61 is moved and contacts the chain plate 1. The movement of the unloading rod 61 drives the chain plate 1 to move towards the unloading table 62. The chain plate 1 slides along the unloading table 62 to the designated position. During the movement of the unloading rod 61, the driving column 64 disengages from the driven rod 63, and the protruding column 67 disengages from the driving groove. Under the action of the tension spring 65, the driven rod 63 adheres to the side of the bending die 69, and the distance between the transfer block 66 and the driven rod 63 decreases. After the unloading rod 61 pushes out the chain plate 1, it moves towards the edge of the bending die 69. At this time, the driving column 64 will contact the driven rod 63 again, and the protruding column 67 will contact the driving groove, causing the driven rod 63 to rotate on the base surface. If there is a chain plate 1 stuck on the surface of the base 2, the driven rod 63 will drive it to move into the unloading table 62. After the chain plate 1 is bent, it is directly unloaded by pushing the unloading rod 61 and the passive rod 63. The unloading is done directly through the physical structure, so that the operator does not have to come into contact with the press and the chain plate 1. This effectively avoids the safety hazards caused by the high temperature of the chain plate 1 or the operation of the press, and further improves the safety of operation. like Figure 3As shown, a discharge cylinder is fixedly connected to the surface of the base 2, and the end of the piston rod inside the discharge cylinder is fixedly connected to the discharge rod 61. It should be noted that both the unloading cylinder and the pushing cylinder are guide rod cylinders. A guide rod cylinder generally includes a cylinder body and a guide rod device. The guide rod cylinder achieves the reciprocating motion of the piston by controlling the direction of compressed air inlet and outlet. When compressed air enters the rodless chamber of the cylinder, the piston moves towards the rod chamber under air pressure, driving the piston rod and the load to move. Conversely, when compressed air enters the rod chamber, the piston moves towards the rodless chamber. The guide rod cylinder is a conventional component in this technical field, and those skilled in the art can select it according to actual needs. Working principle of the invention: When processing chain plate 1, firstly, chain plate 1 is stacked on the surface of the feeding platform 32. The loading platform 31 is rotated so that the feeding platform 32 on which chain plate 1 is stacked rotates to contact the placement plate. Then, the pushing cylinder is activated, which drives the pushing plate to move. The pushing plate passes through the through groove 33 and pushes the chain plate 1 to be bent to the surface of the placement plate. The induction heaters around the placement plate heat the chain plate 1 to be bent. Then, the robotic arm moves the chain plate 1 to be bent to the surface of the bending die 69 and bends the chain plate 1. After bending is completed, the unloading cylinder is controlled to move the unloading rod 61. 1. The chain plate 1 is moved toward the unloading table 62. During the movement of the unloading plate, the column 64 is disengaged from the passive rod 63. The passive rod 63 contacts the surface of the bending die 69 under the action of the tension spring 65. If the chain plate 1 is not moved to the surface of the unloading table 62, the unloading rod 61 is moved and controlled to move back to its original position. During the backward movement of the unloading rod 61, the column 64 is brought into contact with the passive rod 63, and one side of the passive rod 63 is rotated. Then the passive rod 63 rotates and disengages from the bending die 69. At this time, the chain plate 1 that is stuck on the surface of the base 2 will be driven into the surface of the unloading table 62, completing the unloading of the chain plate 1.

[0021] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An automatic loading and unloading device for heating and bending chain plates, comprising a base (2), characterized in that, The base (2) is fixedly provided with a material conveying mechanism and a bending mechanism. The material conveying mechanism includes: The feeding assembly includes a feeding platform (31) rotatably disposed on the surface of the base (2), a plurality of feeding platforms (32) are fixedly connected to the surface of the feeding platform (31), the position of the chain plate is limited by the limiting component on the surface of the feeding platform (32), a pushing component is slidably connected to the surface of the base (2), and a through groove (33) is opened on the surface of the feeding platform (31), and the pushing component is slidably disposed inside the through groove (33); A material unloading assembly is slidably disposed on the surface of the base (2), the material unloading assembly being slidably disposed inside the bending mechanism; Rotate the transfer component set on the surface of the base (2), the transfer component is used to realize the movement of the feeding component to push the chain plate into the bending mechanism.

2. The automatic loading and unloading device for heating and bending chain plates as described in claim 1, characterized in that, The cross-section of the feeding platform (32) is L-shaped. The limiting component includes two limiting plates (41) that are slidably disposed on the surface of the feeding platform (32). A protruding ring (42) is fixedly connected to the surface of the limiting plate (41). A sliding groove is provided on the surface of the feeding platform (32). The protruding ring (42) is adapted to the sliding groove. Limiting rings (43) are slidably connected to the surface of the limiting plate (41).

3. The automatic loading and unloading device for heating and bending chain plates as described in claim 2, characterized in that, The limiting plate (41) is rotatably connected to a limiting rod (44), and the limiting rod (44) is threadedly connected to a limiting ring (43); the feeding platform (32) is rotatably connected to a bidirectional screw (45), and the bidirectional screw (45) is threadedly connected to the limiting plate (41).

4. The automatic loading and unloading device for heating and bending chain plates as described in claim 2, characterized in that, The bending mechanism includes a bending die (69) and a power execution and transmission device. The base (2) includes a press frame. The bending die (69) is fixedly mounted on the surface of the press frame. The bending die (69) and the unloading table (32) are perpendicular to each other in space. The transfer component includes a robotic arm.

5. The automatic loading and unloading device for heating and bending chain plates as described in claim 4, characterized in that, The pushing assembly includes a pushing block (52) that is slidably disposed on the surface of the base (2). The pushing block (52) is adapted to the through groove (33). The cross-section of the pushing block (52) is T-shaped. The surface of the limiting ring (43) is provided with an inner groove (51), which is adapted to the pushing block (52).

6. The automatic loading and unloading device for heating and bending chain plates as described in claim 5, characterized in that, The unloading assembly includes an unloading rod (61) that is slidably disposed on the surface of the base (2). The unloading rod (61) is slidably disposed on the surface of the bending die (69). An unloading platform (62) is fixedly disposed on the surface of the base (2). The unloading platform (62) is inclinedly disposed on the surface of the base (2).

7. The automatic loading and unloading device for heating and bending chain plates as described in claim 6, characterized in that, A passive rod (63) is rotatably connected to the surface of the base (2). The rotation center of the passive rod (63) is located on the edge extension line of the bending die (69). A driving column (64) is fixedly connected to the surface of the unloading rod (61). The projection of the driving column (64) toward the passive rod (63) covers part of the passive rod (63). A tension spring (65) is provided between the passive rod (63) and the unloading rod (61).

8. The automatic loading and unloading device for heating and bending chain plates as described in claim 6, characterized in that, The base (2) is slidably connected to a push cylinder. The piston rod end inside the push cylinder is fixedly connected to the push block (52). The base (2) is fixedly connected to a discharge cylinder. The piston rod end inside the discharge cylinder is fixedly connected to the discharge rod (61).

9. The automatic loading and unloading device for heating and bending chain plates as described in claim 7, characterized in that, The base (2) has a transfer block (66) slidably connected to its surface. The tension spring (65) is fixedly installed between the transfer block (66) and the passive rod (63). The transfer block (66) has a protruding column (67) fixedly connected to its surface. The unloading rod (61) has a drive groove on the side near the transfer block (66). The drive groove is adapted to the protruding column (67).

10. The automatic loading and unloading device for heating and bending chain plates as described in claim 7, characterized in that, A central rod (68) is fixedly connected to the surface of the base (2), and a nut is threaded onto the surface of the central rod (68). Several adjustment grooves are provided on the surface of the passive rod (63), and the adjustment grooves are adapted to the central rod (68).