A punching mechanism for thick-wall connecting piece of iron tower

Abstract

This invention relates to the technical field of punching processing, and in particular to a punching mechanism for thick-walled connecting parts of iron towers. The mechanism includes an upper template, an upper punch, a lower template, and a lower punch. Both the upper and lower templates have die holes. The upper punch, the lower punch, and the two die holes are coaxially arranged and cooperate with each other. By using the upper and lower punches to press the two sides of the connecting part sequentially, the processing areas on both sides of the connecting part can be damaged, facilitating the smooth separation of the tail material from the connecting part during the punching process, preventing adhesion and the formation of protrusions on the surface of the connecting part, improving the surface flatness of the connecting part, and facilitating subsequent use. The upper and lower templates provide a bidirectional limiting function for the connecting part and allow for staggered use of the upper and lower templates in conjunction with the upper and lower punches.

Description

Technical Field

[0001] This invention relates to the technical field of punching, and in particular to a punching mechanism for thick-walled connecting parts of iron towers. Background Technology

[0002] Transmission line towers are crucial supporting structures in power transmission systems. They are mainly composed of various types of steel (such as angle steel and steel plates) and other tower components connected by bolts. During the manufacturing and assembly of the towers, connectors (also known as connecting plates or link plates) play an irreplaceable role. Generally, round holes are made on the connectors to cooperate with bolts to form connections between the main components.

[0003] Currently, the processing of round holes on tower connectors generally uses punching equipment for stamping. The traditional punching process uses a punch press to drive a single punch to extrude the connector blank on one side in the vertical direction, causing the material to separate under the combined action of the die and the die, thereby forming the required round hole. However, this one-sided punching method will form a noticeably protruding circular flange or rim on the back of the blank after punching, which will reduce the flatness of the connector plate. This not only affects the appearance quality of the component, but also makes it easier to cause poor fit during the subsequent bolt installation process. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a punching mechanism for thick-walled connecting parts of iron towers, the specific technical solution of which is as follows: The present invention provides a punching mechanism for a thick-walled connector of a steel tower, comprising an upper template, an upper punch, a lower template, and a lower punch. The upper template and the lower template are provided with die holes. The upper punch, the lower punch, and the two die holes are coaxially arranged and cooperate with each other. The distance between the upper and lower templates corresponds to the wall thickness of the connector, so that the upper and lower templates cooperate to limit the connector between them. The lower punch passes through the corresponding die hole and extrudes an indentation on one side of the connector, while the upper punch punches the connector on the other side.

[0005] Furthermore, after the lower punch extrudes an indentation on one side of the connector, it cooperates with the upper punch to press the punched position of the connector and moves synchronously with the upper punch.

[0006] Furthermore, the punching mechanism also includes a back plate, which moves along a direction perpendicular to the axis of the upper punch via a guide rail. The back plate is provided with an inclined groove and a curved groove. Movable bodies are provided in both the inclined groove and the curved groove, and the two movable bodies are respectively fixed relative to the upper punch and the lower punch. The curved groove includes a second inclined groove, a flat groove, and a third inclined groove. The inclined grooves of the second and third inclined grooves are in opposite directions. The third inclined groove is parallel to the first inclined groove. The flat groove is perpendicular to the axis of the upper punch.

[0007] Furthermore, an inclined groove four is provided at the end of the inclined groove three that is away from the flat groove. During the movement of the moving body on the lower punch in the inclined groove four, the lower punch and the upper punch move in the same direction and separate from each other.

[0008] Furthermore, the punching mechanism also includes a base frame, and both the upper template and the lower template are disposed on the base frame, and the position of at least one of the upper template and the lower template on the base frame is adjustable.

[0009] Furthermore, the base frame is right-angled, the lower template is fixed on one right-angled side of the right angle, an auxiliary body is provided on the upper template, and several protruding ridges are provided on the other right-angled side of the right angle and on the side wall of the auxiliary body. The auxiliary body and the base frame are interlocked by the protruding ridges. The base frame has elongated holes, and the auxiliary body is fastened to the base frame by bolts and elongated holes.

[0010] Furthermore, the lower punch is provided with a connecting plate one, the upper punch is provided with a connecting plate two, the two moving bodies are respectively fixedly connected to the connecting plate one and the connecting plate two, the connecting plate two is provided with a vertical rod, the vertical rod passes through the connecting plate one and is slidably connected to each other; The connecting plate two has an irregular cross-sectional shape, and the upper punch has a slot that matches the cross-sectional shape of the connecting plate two.

[0011] Furthermore, a slider is slidably mounted on the base frame, and a lever is rotatably mounted on the slider. The lever is rotatably connected to the connecting plate by an inclined pull rod. As the lower punch moves away from the upper punch, the lever pushes the tail material after punching the lower punch.

[0012] The beneficial effects of this invention are as follows: By using an upper and lower punch to press the two sides of the connector sequentially, the processing areas on both sides of the connector can be damaged. This facilitates the smooth separation of the tail material from the connector during the punching process, preventing adhesion and the formation of protrusions on the surface of the connector, thus improving the surface flatness of the connector and facilitating subsequent use. The upper and lower templates can be used to form a bidirectional constraint function for the connector, and it is easy to use the upper and lower templates alternately with the upper and lower punches. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of a punching mechanism for a thick-walled connector of an iron tower. Figure 2 for Figure 1 Schematic diagram of the backplate and its superstructure; Figure 3 for Figure 1 Schematic diagram of the upper punch, lower punch, and their upper structure; Figure 4 for Figure 1 Structural diagram of the upper and lower templates and the base frame; Figure 5 for Figure 4 A diagram of the back side; Figure 6 for Figure 4 A diagram showing the view from below; Figure label: 1. Upper template; 2. Upper punch; 3. Lower template; 4. Lower punch; 5. Guide rail; 6. Back plate; 7. Inclined groove one; 8. Curved groove; 9. Moving body; 10. Inclined groove two; 11. Flat groove; 12. Inclined groove three; 13. Inclined groove four; 14. Base frame; 15. Protruding ridge; 16. Auxiliary body; 17. Long hole; 18. Connecting plate one; 19. Connecting plate two; 20. Vertical rod; 21. Slider; 22. Lever; 23. Pull rod. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0017] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0018] like Figures 1 to 4 As shown, a punching mechanism for a thick-walled connecting component of a steel tower according to the present invention includes an upper template 1, an upper punch 2, a lower template 3 and a lower punch 4. The upper template 1 and the lower template 3 are both provided with die holes. The upper punch 2, the lower punch 4 and the two die holes are coaxially arranged and cooperate with each other. The distance between the upper template 1 and the lower template 3 corresponds to the wall thickness of the connector, so that the upper template 1 and the lower template 3 cooperate to limit the connector between them. The lower punch 4 passes through the corresponding die hole and extrudes an indentation on one side of the connector. The upper punch 2 punches the connector on the other side of the connector.

[0019] In this invention, the upper template 1 and the upper punch 2 are located on the upper side, and the lower template 3 and the lower punch 4 are located on the lower side. The upper punch 2 and the lower punch 4 are located outside the upper template 1 and the lower template 3. The upper template 1 and the lower template 3 can cooperate to limit the connector placed in the gap between them, so that the connector cannot move along the axis of the upper punch 2. That is, the squeezing of the upper punch 2 on one side of the connector and the squeezing of the lower punch 4 on the other side of the connector cannot make the connector move. To enhance this limiting effect, the distance between the upper template 1 and the lower template 3 can be close to the thickness of the connector, or the distance between the upper template 1 and the lower template 3 can be slightly greater than the thickness of the connector.

[0020] The upper punch 2, lower punch 4, and two die holes are arranged collinearly, meaning that the upper punch 2 can pass through both die holes, and the lower punch 4 can also pass through both die holes. The outer diameters of the upper punch 2 and the lower punch 4 are matched with the inner diameters of the die holes, thus facilitating the punching of the connecting parts by either the upper punch 2 or the lower punch 4. In other words, both the upper punch 2 and the lower punch 4 can perform punching operations on the connecting parts independently. When the upper punch 2 punches the connecting parts, the upper punch 2 matches the die hole on the lower template 3. The die hole on the upper template 1 mainly provides a path for the movement of the upper punch 2. When the lower punch 4 punches the connecting parts, the lower punch 4 matches the die hole on the upper template 1. The die hole on the lower template 3 mainly provides a path for the movement of the lower punch 4.

[0021] In use, the connector is placed between the upper template 1 and the lower template 3, with the punching positions on the connector corresponding to the die hole positions. The upper punch 2 and the lower punch 4 are moved toward the connector using hydraulic pressure or other means. The lower punch 4 first passes through the die hole on the lower template 3 and contacts one side of the connector. At this time, the lower punch 4 extrudes an annular indentation of a predetermined depth on the surface of the connector to pre-disrupt the continuity of the structure in this area. Then, the upper punch 2 passes through the die hole on the upper template 1 and extrudes the other side of the connector, finally punching out a round hole, thus completing the processing of the connector. The tail material punched out by the upper punch 2 can be discharged through the die hole on the lower template 3.

[0022] By using the upper punch 2 and the lower punch 4 to press the two sides of the connector in sequence, the processing areas on both sides of the connector can be damaged, which facilitates the smooth separation of the tail material from the connector during the punching process, avoids adhesion and the formation of a protrusion on the surface of the connector, improves the surface flatness of the connector, and facilitates subsequent use; the upper template 1 and the lower template 3 can form a bidirectional limiting function for the connector between them, and it is easy to use the upper template 1 and the lower template 3 in staggered ways with the upper punch 2 and the lower punch 4.

[0023] Furthermore, after the lower punch 4 extrudes an indentation on one side of the connector, it cooperates with the upper punch 2 to press the punched position of the connector and moves synchronously with the upper punch 2.

[0024] After the lower punch 4 moves upward and extrudes an indentation on the bottom surface of the connector, the lower punch 4 can stop moving. At this time, the upper punch 2 moves downward and contacts the top surface of the connector. The upper punch 2 and the lower punch 4 cooperate to squeeze the punching area between them. Then, the upper punch 2 and the lower punch 4 move downward synchronously while maintaining the squeezing of the material in the area until the punching process is completed. Using the above method, the clamping characteristics of the punching area of ​​the connector can be realized. That is, the normal compressive stress provided by the clamping force can actively counteract the tensile stress and rolling torque generated around the shearing area, thereby blocking the tendency of the material on the back of the connector to flow randomly out of the hole. This facilitates the material to undergo ideal plastic slip along the predetermined shearing zone, thereby controlling the height of the back flange within a very small range or even eliminating it completely. At the same time, this clamping characteristic can guide the material flow in the punching area of ​​the connector in an orderly manner, and the generation and propagation of cracks are limited within the pre-indentation contour, thereby forming a flat and dense hole wall surface.

[0025] Furthermore, the punching mechanism also includes a back plate 6, which moves along a direction perpendicular to the axis of the upper punch 2 via a guide rail 5. The back plate 6 is provided with a slanted groove 7 and a curved groove 8. Moving bodies 9 are provided in both the slanted groove 7 and the curved groove 8. The two moving bodies 9 are respectively fixed relative to the upper punch 2 and the lower punch 4. The curved groove 8 includes a second inclined groove 10, a flat groove 11, and a third inclined groove 12. The inclined grooves 10 and 12 are inclined in opposite directions. The third inclined groove 12 is parallel to the first inclined groove 7. The flat groove 11 is perpendicular to the axis of the upper punch 2.

[0026] Based on the vertical movement of the upper punch 2 and the lower punch 4, the back plate 6 can move laterally on the guide rail 5, thereby making the movement trajectory of the back plate 6 perpendicular to the axis of the upper punch 2, which facilitates the transmission of the movement of the upper punch 2 to the lower punch 4 by using the movement direction of the back plate 6.

[0027] When the upper punch 2 moves toward the lower punch 4 under hydraulic or other driving conditions, the upper punch 2 can push the back plate 6 to move laterally on the guide rail 5 through its upper moving body 9 and the inclined groove 7 on the back plate 6. At this time, the curved groove 8 on the back plate 6 cooperates with the corresponding moving body 9 to push the lower punch 4 to move synchronously. Specifically, when the moving body 9 moves in the inclined groove 10, the lower punch 4 moves toward the upper punch 2. The top of the lower punch 4 contacts the bottom of the connector and extrudes an indentation of a specified depth at the bottom of the connector. When the moving body 9 moves in the flat groove 11, the lower punch 4 stops moving and waits for the upper punch 2. When the moving body 9 moves in the inclined groove 12, the upper punch 2 contacts the top surface of the connector and squeezes the connector. Since the inclined groove 12 is parallel to the inclined groove 7, the upper punch 2 and the lower punch 4 move downward synchronously. The upper punch 2 and the lower punch 4 maintain a state of clamping the punching area of ​​the connector between them.

[0028] Furthermore, an inclined groove 13 is provided at the end of the inclined groove 12 away from the flat groove 11. During the movement of the moving body 9 on the lower punch 4 in the inclined groove 13, the lower punch 4 and the upper punch 2 move in the same direction and separate from each other.

[0029] The inclination angle of the sloping groove 4 13 is greater than that of the sloping groove 1 7. Therefore, when the upper punch 2 drives the back plate 6 to move laterally, the moving body 9 moves within the sloping groove 4 13, and the lower punch 4 moves downward at a faster speed. The lower punch 4 separates from the upper punch 2. At this time, the bottom of the upper punch 2 passes through the die hole on the lower template 3, and the upper punch 2 and the lower punch 4 stop clamping the tail material between them, which makes it easier to remove the tail material on the lower punch 4.

[0030] Furthermore, the punching mechanism also includes a base frame 14, with the upper template 1 and the lower template 3 both mounted on the base frame 14, and the position of at least one of the upper template 1 and the lower template 3 on the base frame 14 is adjustable.

[0031] The base frame 14 can provide an installation position for the upper template 1 and the lower template 3. To improve the support effect, multiple base frames 14 can be set. Both the upper template 1 and the lower template 3 can be moved on the base frame 14, or one of the upper template 1 and the lower template 3 can be moved on the base frame 14 while the other is fixed on the base frame 14. This allows the distance between the upper template 1 and the lower template 3 to be adjusted, which is convenient for processing connectors of different thicknesses.

[0032] Furthermore, the base frame 14 is right-angled, the lower template 3 is fixed on one right-angled side of the right angle, the upper template 1 is provided with an auxiliary body 16, and several protruding ribs 15 are provided on the other right-angled side of the right angle and on the side wall of the auxiliary body 16. The auxiliary body 16 and the base frame 14 are interlocked by the protruding ribs 15. The base frame 14 is provided with an elongated hole 17, and the auxiliary body 16 is fastened to the base frame 14 by bolts and the elongated hole 17.

[0033] like Figure 4 As shown, the lower template 3 can be fastened to a right-angled side of the base frame 14 by bolts. The auxiliary body 16 on the upper template 1 can provide auxiliary support for the upper template 1 and increase the contact area with the base frame 14. Multiple bolts can be set on the side wall of the auxiliary body 16, and the bolts can pass through the elongated hole 17. A nut is set on the back side of the base frame 14. The bolts and nuts cooperate to fasten the auxiliary body 16 to the base frame 14. Of course, when the nut is loosened, the bolt can also be moved in the elongated hole 17, thereby adjusting the position of the upper template 1 on the base frame 14.

[0034] The protruding ribs 15 on the base frame 14 can fit with the gap between two adjacent protruding ribs 15 on the auxiliary body 16, thereby realizing the mutual snap-fit ​​and fixation between the upper template 1 and the base frame 14, and preventing the upper template 1 from slipping on the base frame 14.

[0035] Furthermore, a connecting plate 18 is provided on the lower punch 4, and a connecting plate 29 is provided on the upper punch 2. The two moving bodies 9 are fixedly connected to the connecting plate 18 and the connecting plate 29 respectively. A vertical rod 20 is provided on the connecting plate 29, and the vertical rod 20 passes through the connecting plate 18 and slides to each other. Among them, the cross-sectional shape of the connecting plate 2 19 is irregular, and the upper punch 2 is provided with a slot that matches the cross-sectional shape of the connecting plate 2 19.

[0036] Connecting plate 18 and connecting plate 29 can provide support for the lower punch 4 and the upper punch 2 respectively. The connection between connecting plate 18 and the lower punch 4 and the connection between connecting plate 29 and the upper punch 2 can be fastened with bolts, or the irregular cross section of connecting plate 29 can be matched with the slot on the upper punch 2. This can facilitate quick connection and disassembly / replacement.

[0037] The second connecting plate 19 can be directly fixed to the output end of the external hydraulic cylinder or other drive structure. The first connecting plate 18 needs to be guided by the vertical rod 20. Otherwise, when the lower punch 4 separates from the lower template 3, the moving body 9 on the first connecting plate 18 cannot provide sufficient support for the lower punch 4. When the second connecting plate 19 and the upper punch 2 move, the vertical rod 20 moves synchronously and slides relative to the first connecting plate 18.

[0038] The irregular cross-section of connecting plate 219 can be as follows: Figure 3 The T-shape, or other shapes such as rhombuses, are shown.

[0039] Furthermore, a slider 21 is slidably mounted on the base frame 14, and a lever 22 is rotatably mounted on the slider 21. The lever 22 is rotatably connected to the connecting plate 18 via an inclined pull rod 23. As the lower punch 4 moves away from the upper punch 2, the lever 22 pushes down the tail material after punching the hole on the lower punch 4.

[0040] like Figure 6 As shown, the lever 22 moves along the direction perpendicular to the axis of the upper punch 2 via the slider 21. When the upper punch 2 passes through the die hole on the lower template 3 and the upper punch 2 and the lower punch 4 gradually move away from each other, the tail material at the top of the lower punch 4 can be pushed away from the lower punch 4 by the lever 22, thereby achieving the purpose of material discharge.

[0041] When the connecting plate 18 and the lower punch 4 move, the connecting plate 18 can pull the lever 22 to move via the pull rod 23, thus eliminating the need for a separate drive structure for the lever 22 and simplifying the structure.

[0042] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A punching mechanism for thick-walled connecting parts of iron towers, characterized in that, It includes an upper template, an upper punch, a lower template, and a lower punch. The upper template and the lower template are both provided with die holes. The upper punch, the lower punch, and the two die holes are all coaxially arranged and cooperate with each other. The distance between the upper and lower templates corresponds to the wall thickness of the connector, so that the upper and lower templates cooperate to limit the connector between them. The lower punch passes through the corresponding die hole and extrudes an indentation on one side of the connector, while the upper punch punches the connector on the other side.

2. The punching mechanism for thick-walled connecting parts of iron towers according to claim 1, characterized in that, After the lower punch extrudes an indentation on one side of the connector, it cooperates with the upper punch to press the punched position of the connector and moves synchronously with the upper punch.

3. The punching mechanism for thick-walled connecting parts of iron towers according to claim 1, characterized in that, The punching mechanism also includes a back plate, which moves along a direction perpendicular to the axis of the upper punch via a guide rail. The back plate is provided with an inclined groove and a curved groove. Movable bodies are provided in both the inclined groove and the curved groove, and the two movable bodies are respectively fixed relative to the upper punch and the lower punch. The curved groove includes a second inclined groove, a flat groove, and a third inclined groove. The inclined grooves of the second and third inclined grooves are in opposite directions. The third inclined groove is parallel to the first inclined groove. The flat groove is perpendicular to the axis of the upper punch.

4. The punching mechanism for thick-walled connecting parts of iron towers according to claim 3, characterized in that, An inclined groove four is provided at the end of the inclined groove three that is away from the flat groove. During the movement of the moving body on the lower punch in the inclined groove four, the lower punch and the upper punch move in the same direction and separate from each other.

5. The punching mechanism for thick-walled connecting parts of iron towers according to claim 3, characterized in that, The punching mechanism also includes a base frame, and the upper template and the lower template are both disposed on the base frame, and the position of at least one of the upper template and the lower template on the base frame is adjustable.

6. The punching mechanism for thick-walled connecting parts of iron towers according to claim 5, characterized in that, The base frame is right-angled. The lower template is fixed on one right-angled side of the right-angled shape. An auxiliary body is provided on the upper template. Several protruding ridges are provided on the other right-angled side of the right-angled shape and on the side wall of the auxiliary body. The auxiliary body and the base frame are interlocked by the protruding ridges. The base frame has elongated holes. The auxiliary body is fastened to the base frame by bolts and elongated holes.

7. The punching mechanism for thick-walled connecting parts of iron towers according to claim 5, characterized in that, The lower punch is provided with a connecting plate one, and the upper punch is provided with a connecting plate two. The two moving bodies are respectively fixedly connected to the connecting plate one and the connecting plate two. A vertical rod is provided on the connecting plate two, and the vertical rod passes through the connecting plate one and is slidably connected to each other. The connecting plate two has an irregular cross-sectional shape, and the upper punch has a slot that matches the cross-sectional shape of the connecting plate two.

8. The punching mechanism for thick-walled connecting parts of iron towers according to claim 7, characterized in that, A slider is slidably mounted on the base frame, and a lever is rotatably mounted on the slider. The lever is rotatably connected to the connecting plate by an inclined pull rod. As the lower punch moves away from the upper punch, the lever pushes the tail material after punching the lower punch off.

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