Punch forming die set device for metal chair legs

Abstract

The invention discloses a metal chair leg punch forming die set device, and relates to the technical field of metal chair leg punch forming die sets, the metal chair leg punch forming die set device comprises a base, a bottom die is arranged at the upper end of the base, guide columns are longitudinally arranged at four corners of the base, and a top plate is movably mounted on the guide columns; a top die is fixedly installed at the lower end of the top plate, a module is movably installed in the bottom die, guide blocks are arranged at the two ends of the module, and guide grooves matched with the guide blocks are formed in the inner wall of the bottom die. By arranging the limiting plate, after a sectional material is placed on the bottom die, the limiting plate is turned upwards to abut against the edge of the sectional material, so that the sectional material is centered in one step, it can be guaranteed that the sectional material is not excessively eccentric, it can be guaranteed that the protruding part of a stamped product is concentric with the edge, and the possibility that edge cutting and circle keeping are needed subsequently is reduced; the waste of materials is reduced, meanwhile, procedures and equipment needing trimming are reduced, and the production process is greatly optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal chair leg stamping forming die set, in particular to a metal chair leg stamping forming die set device. BACKGROUND

[0002] The bar chair is a kind of chair, the basic structure is except for the cushion part, the lower side chair leg is divided into disc-shaped base and column-shaped rod part, and because it can rotate the cushion and lift the height alone, it is now widely used. The disc part of the bar chair leg is usually only a few centimeters, but because it needs to be connected with the column-shaped support rod, it needs to be lifted to a certain height by the center position through the stamping equipment, and the stamping forming needs to be matched with the die to facilitate one-time stamping forming. The structure of the existing stamping forming die set for the chair leg is the recess of the upper die and the convex part of the lower die, without other functions, when the worker operates, the disc-shaped metal profile needs to be placed on the bottom die, and it is manually centered, which is unstable and has a certain amount of error. After that, the cutting machine needs to be used to center the circle, and a part of the edge is cut off with the convex part as the center, so as to achieve the effect that the edge and the center convex part have the same center. This method not only wastes materials, but also increases the operation process and equipment. In addition, because the profile is made of pure metal, it is laborious to frequently take and place the profile, and when adjusting the centering, the surface of the profile directly rubs with the surface of the bottom die, which is easy to scratch, so that the polishing time needs to be increased in subsequent processing. SUMMARY

[0003] (I) The technical problem solved: in view of the above-mentioned shortcomings of the prior art, the present application provides a metal chair leg stamping forming die set device, which can effectively solve the problems of the prior art.

[0004] (II) Technical scheme: in order to achieve the above purpose, the present application is realized by the following technical scheme: The application discloses a metal chair leg stamping forming die set device, which comprises a base, a bottom die is arranged at the upper end of the base, guide columns are longitudinally arranged at the four corners of the base, a top plate is movably arranged on the guide columns, a top die is fixedly arranged at the lower end of the top plate, a module is movably arranged in the bottom die, guide blocks are arranged at the two ends of the module, guide grooves matched with the guide blocks are formed in the inner wall of the bottom die, a top frame is arranged at the upper end of the guide column through a telescopic assembly, pressure rods are symmetrically welded at the two ends of the top frame, the lower end of the pressure rod penetrates through the top plate, guide sleeves are symmetrically arranged at the upper end of the bottom die, the lower end of the pressure rod is movably inserted into the guide sleeves, two groups of top blocks are rotatably arranged in the base, a plurality of groups of lifting grooves are equidistantly formed in the upper surface of the bottom die, rollers are arranged in the lifting grooves, a hinged frame is hingedly arranged on the outer wall of the upper side of the bottom die in an annular array, two groups of sleeve rods are symmetrically arranged in the bottom die, a connecting rod assembly is arranged between the sleeve rods and the hinged frame, a transmission assembly is arranged between the two groups of sleeve rods, a driving rod is fixedly welded on one group of the sleeve rods, and the driving rod is movably inserted into the outer end of the bottom die, and a limiting plate is arranged at the upper end of the hinged frame through an adjusting assembly.

[0005] Further, the telescopic assembly comprises movable columns, the lower end of the top frame is fixedly welded with movable columns at the four corners, the lower side of the movable column is movably sleeved with a sleeve column, the lower end of the sleeve column is fixedly welded with the upper end of the guide column, the inside of the sleeve column is longitudinally provided with a telescopic spring, and the upper and lower ends of the telescopic spring are respectively abutted with the lower end of the movable column and the inner wall of the lower end of the sleeve column.

[0006] Further, the bottom of the lifting groove is fixedly provided with a fixed seat, the upper end of the fixed seat is movably provided with a positioning rod, the upper end of the positioning rod is fixedly welded with a wheel frame, the roller is rotatably arranged at the upper end of the wheel frame through a central shaft, the upper surface of the roller protrudes from the upper surface of the bottom die, the positioning rod is sleeved with a return spring, and the upper and lower ends of the return spring are respectively abutted with the wheel frame and the fixed seat.

[0007] Further, the transmission assembly comprises a toothed rod, the two ends of the sleeve rod are fixedly connected with the toothed rod, a gear is rotatably arranged in the bottom die through a rotating shaft, the toothed rods at the ends of the left and right groups of sleeve rods are arranged in a staggered mode, and the toothed rods at the ends of the left and right groups of sleeve rods are respectively meshed with the two sides of the gear.

[0008] Further, the adjusting assembly comprises a wear-resistant pad, the lower end of the limiting plate is rotatably arranged at the middle position of the hinged frame, the surface of the limiting plate is provided with a wear-resistant pad, the surface of the limiting plate close to the hinged frame is provided with a T-shaped sliding groove, a T-shaped sliding block is slidably arranged in the T-shaped sliding groove, the outer end of the T-shaped sliding block is hingedly connected with a screw rod, a screw sleeve is fixedly arranged on the surface of the hinged frame, and the screw rod is threadedly inserted into the screw sleeve.

[0009] (Three) beneficial effects: compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects: By setting the top block and the module, when the hydraulic push rod moves downward, the top die will clamp the profile together with the bottom die, and the top block will lift the module, thereby realizing stamping forming. In this way, single power can be used to directly realize the operation of stamping forming.

[0010] By setting the roller, the roller can support the profile before stamping, and after the die is pressed down, the roller can be forced into the lifting groove to make the profile be supported by the bottom die, ensuring the normal progress of stamping. After the top die is not in contact with the profile, the profile can be lifted again by the restoring force of the return spring. In this way, when the profile is placed, the friction resistance can be reduced by the rolling of the roller, which is more convenient and labor-saving than the direct friction displacement of the profile on the bottom die. At the same time, the wear and tear of the profile surface is reduced, and the subsequent polishing time is reduced.

[0011] By setting the limiting plate, after the profile is placed on the bottom die, the limiting plate can be turned up to resist the edge of the profile, so that it is centered in one step. In this way, it can be ensured that the profile will not be eccentric, so that the protruding part of the product after stamping is concentric with the edge, reducing the possibility of subsequent edge cutting and rounding, reducing the waste of materials, and reducing the process and equipment required for edge cutting, greatly optimizing the production process and increasing the functionality of the mold set. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0013] Figure 1 is a schematic diagram of the mold state of the present application; Figure 2 is a schematic diagram of the mold opening state of the present application; Figure 3 is a schematic diagram of the structure cross section of the mold state of the present application; Figure 4 is a schematic diagram of the structure top view of the bottom die in the present application; Figure 5 is a schematic diagram of the structure side view cross section of the bottom die in the present application; Figure 6 is a schematic diagram of the structure cross section of the bottom die and the guide groove in the present application; Figure 7 is a schematic diagram of the structure top view cross section of the bottom die in the present application; Figure 8 The structural section schematic diagram of the lifting groove in the application; Figure 9 The structural schematic diagram of the connecting rod assembly in the application; Figure 10 The structural section schematic diagram of the adjusting assembly in the application.

[0014] The numbers in the figure respectively represent, 1, base; 2, bottom die; 3, guide column; 4, top plate; 5, top die; 6, module; 7, guide block; 8, guide groove; 9, pressing rod; 10, top frame; 11, movable column; 12, sleeve column; 13, extension spring; 14, guide sleeve; 15, top block; 16, lifting groove; 17, fixed seat; 18, positioning rod; 19, wheel frame; 20, return spring; 21, roller; 22, hinged frame; 23, hinged rod; 24, sliding rod; 25, rod groove; 26, connecting rod; 27, sleeve rod; 28, toothed rod; 29, gear; 30, driving rod; 31, limit plate; 32, wear-resistant pad; 33, T-shaped sliding groove; 34, T-shaped sliding block; 35, screw rod; 36, screw sleeve. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are some of the embodiments of the application, not all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.

[0016] Please refer to Figures 1-10One embodiment of the present invention provides a metal chair leg stamping die assembly device, including a base 1, a bottom mold 2 provided at the upper end of the base 1, guide posts 3 longitudinally provided at the four corners of the base 1, a top plate 4 movably mounted on the guide posts 3, a top mold 5 fixedly mounted at the lower end of the top plate 4, a module 6 movably mounted inside the bottom mold 2, and guide blocks 7 provided at both ends of the module 6, a guide groove 8 adapted to the guide blocks 7 being opened on the inner wall of the bottom mold 2, a top frame 10 being installed at the upper end of the guide posts 3 via a telescopic component, pressure rods 9 being symmetrically welded at both ends of the top frame 10, and the lower ends of the pressure rods 9 passing through the top plate 4, and symmetrically arranged on both sides of the upper end of the bottom mold 2. The lower end of the guide sleeve 14 and the pressure rod 9 are movably inserted into the guide sleeve 14. Two sets of top blocks 15 are rotatably installed inside the base 1. Multiple sets of lifting grooves 16 are equidistantly opened on the upper surface of the bottom mold 2. Rollers 21 are installed in the lifting grooves 16. A hinge frame 22 is hinged in a ring array on the upper outer wall of the bottom mold 2. Two sets of sleeve rods 27 are symmetrically arranged inside the bottom mold 2. A connecting rod assembly is provided between the sleeve rods 27 and the hinge frame 22. A transmission assembly is provided between the two sets of sleeve rods 27. An active rod 30 is fixedly welded to one set of sleeve rods 27. The active rod 30 is movably inserted into the outer end of the bottom mold 2. A limit plate 31 is installed on the upper end of the hinge frame 22 through an adjustment assembly.

[0017] like Figure 2 As shown, the bottom mold 2 is fixedly installed in the pre-set groove at the upper end of the base 1 by bolts at the bottom. The top mold 5 is fixed upside down on the lower end of the top plate 4 by bolts at the top and bottom. The base 1 and the top plate 4 are parallel and opposite to each other, and the bottom mold 2 and the top mold 5 are parallel and opposite to each other. The lower end of the top mold 5 has a groove that matches the module 6. The upper end of the module 6 is frustum-shaped, with the diameter decreasing from top to bottom. Similarly, the groove at the lower end of the top mold 5 is also frustum-shaped. Pre-set mounting holes are opened at the four corners of the bottom of the base 1, and guide holes that match the guide posts 3 are opened longitudinally at the four corners of the top plate 4. The top plate 4 is installed on the guide posts 3 through the guide holes. The inner diameter of the center hole of the bottom mold 2 matches the outer diameter of the module 6. The guide block 7 slides longitudinally in the guide groove 8. The bottom mold 2 is divided into four layers, as shown in the figure. Figure 5 and Figure 6As shown, the multi-layer is fixed and connected by tightening the bolts from the uppermost side of the bottom die 2 downward, which is convenient for slotting and installation and disassembly of internal components. A preset mounting screw hole is provided at the upper end center position of the top frame 10, and the top frame 10 is fixedly connected with the movable rod end of the hydraulic rod through the screw hole. The top frame 10 is controlled to be pressed down and raised by the hydraulic rod to drive the top die 5 to be pressed down and formed with the bottom die 2. The guide column 3 is symmetrically provided with guide holes at both ends for the lower end of the pressing rod 9 to movably insert. The upper end of the base 1 is provided with a fan-shaped groove at the position where the top block 15 is located. The top block 15 is rotatably installed in the fan-shaped groove, and the upper end openings of the two groups of fan-shaped grooves on the opposite sides are opposite to the lower end openings of the bottom die 2. The bottom die 2 is also provided with a fan-shaped groove at the lower end, which is used to lift the module 6 into the bottom die 2 by rotating the top block 15, thereby realizing the upper lifting operation for the material to be formed by pressing. The bottom die 2 is provided with a movable slot for the transverse movement of the sleeve rod 27 and the connecting rod 26. The sleeve rod 27 and the connecting rod 26 can only move transversely in the movable slot and are parallelly arranged without deviation or inclination. The bottom die 2 is internally provided with a recess for the transverse sliding of the external driving rod 30. The driving rod 30 is movably inserted into the recess, and the outer end is arranged outside the bottom die 2 and provided with a preset screw hole at the end. During installation, the driving rod 30 is connected with the movable rod end of the electric push rod, which drives the driving rod 30 to move transversely, so as to move in the slot of the bottom die 2 and drive the sleeve rod 27 to translate, thereby enabling the limiting plate 31 to realize the overturning.

[0018] As a preferred embodiment in the present embodiment, as shown in Figures 1 to 3 The telescopic assembly includes a movable column 11, and the movable column 11 is fixedly welded at the lower end of the top frame 10. A sleeve column 12 is movably sleeved at the lower side of the movable column 11, and the lower end of the sleeve column 12 is fixedly welded at the upper end of the guide column 3. A telescopic spring 13 is longitudinally arranged in the inside of the sleeve column 12, and the upper and lower ends of the telescopic spring 13 are respectively abutted against the lower end of the movable column 11 and the inner wall of the lower end of the sleeve column 12.

[0019] The lower end of the movable column 11 is provided with a cylindrical limiting block with a diameter larger than the rod portion of the movable column 11. The inner diameter of the opening at the upper end of the sleeve column 12 is consistent with the inner diameter of the rod portion of the movable column 11, and the inner diameter of the inside of the sleeve column 12 is consistent with the outer diameter of the cylindrical limiting block at the lower end of the movable column 11, so as to ensure that the movable column 11 cannot be naturally detached from the sleeve column 12.

[0020] As a preferred embodiment in the present embodiment, as shown in Figure 4 and Figure 8As shown, the bottom of the lifting groove 16 is fixedly installed with a fixed seat 17, and the upper end of the fixed seat 17 is movably inserted with a positioning rod 18, and the upper end of the positioning rod 18 is fixedly welded with a wheel carrier 19, and a roller 21 is rotatably installed on the upper end of the wheel carrier 19, and the upper surface of the roller 21 protrudes from the upper surface of the bottom die 2, and the positioning rod 18 is sleeved with a return spring 20, and the upper and lower ends of the return spring 20 are respectively abutted with the wheel carrier 19 and the fixed seat 17.

[0021] The surface of the roller 21 is provided with a wear-resistant layer of plastic material to avoid damage to the profile surface, and the friction between plastic and metal is small, which facilitates the movement of the profile on the surface. The lower end of the positioning rod 18 penetrates through the upper end of the fixed seat 17, and the end is provided with a limiting block for preventing the positioning rod 18 from being separated from the fixed seat 17, and the lower end of the wheel carrier 19 is located on both sides of the fixed seat 17 to prevent the wheel carrier 19 from rotating through the positioning rod 18, and the height difference of the roller 21 protruding from the surface of the bottom die 2 is less than the overall height of the return spring 20. The structure makes the roller 21 can protrude from the surface of the bottom die 2 to receive the profile, so as to facilitate the placement of the profile on the upper side of the bottom die 2, and in the process of stamping, when the top die 5 extrudes the profile downward, the roller 21 can drive the wheel carrier 19 to enter the lifting groove 16 downward under stress, so that the profile can be attached to the bottom die 2 and the top die 5, and when the top die 5 is lifted, the return spring 20 can lift the profile by using the rebound force, thereby facilitating the movement of the profile, and facilitating the removal.

[0022] As a preferred embodiment in this embodiment, as shown in Figure 7 and Figure 9 The connecting rod assembly includes a hinged rod 23, the lower end of the hinged bracket 22 is hingedly connected with the upper end of the hinged rod 23, the lower end of the hinged rod 23 is hingedly connected with a sliding rod 24, the inner end of the sliding rod 24 is rotatably connected with a connecting rod 26, and the connecting rod 26 is movably inserted into the end of a sleeve rod 27, and a rod groove 25 with a size suitable for the sliding rod 24 is formed in the bottom die 2, and the sliding rod 24 slides in the rod groove 25.

[0023] The outer side opening of the rod groove 25 is on the outer wall of the bottom die 2, the sliding rod 24 is inserted from the opening and moves inside, and the hinged bracket 22 itself is angular, which makes the sleeve rod 27 move transversely, and the connecting rod 26 will be translated, and the connecting rod 26 will pull the sliding rod 24 to stretch and contract in the rod groove 25, and the connecting rod 26 will stretch and contract in the end of the sleeve rod 27 to compensate for the displacement difference, and the sliding rod 24 will pull the hinged rod 23 when it stretches and contracts, so that the hinged bracket 22 can drive the limiting plate 31 to flip.

[0024] As a preferred embodiment in this embodiment, as shown in Figure 5 , Figure 7 and Figure 9As shown, the transmission assembly comprises toothed rods 28, both ends of the sleeve rods 27 are fixedly connected with the toothed rods 28, the bottom die 2 is rotatably installed with a gear 29 through a rotating shaft, the toothed rods 28 at the end of the left and right groups of sleeve rods 27 are arranged in a staggered manner, and the toothed rods 28 at the end of the left and right groups of sleeve rods 27 are respectively engaged with the two sides of the gear 29.

[0025] The bottom die 2 is provided with a groove for the transverse movement of the toothed rods 28 and the rotation of the gear 29, as shown in the upper part of the part, Figure 7 As shown in the upper part of the part, the gear 29 is rotatably installed at a designated position through a rotating shaft, the toothed rods 28 at the end of the left and right groups of sleeve rods 27 are arranged in a staggered manner, and the toothed rods 28 at the end of the left and right groups of sleeve rods 27 are arranged in a staggered manner, and the toothed rods 28 at the end of the left and right groups of sleeve rods 27 are respectively engaged with the two sides of the gear 29.

[0026] As a preferred embodiment in this embodiment, as shown in Figure 4 , Figure 9 and Figure 10 , the adjusting assembly comprises a wear-resistant pad 32, the lower end of the limiting plate 31 is rotatably installed at the middle position of the hinged frame 22, the surface of the limiting plate 31 is provided with a wear-resistant pad 32, the surface of the limiting plate 31 close to the hinged frame 22 is provided with a T-shaped sliding groove 33, and the T-shaped sliding groove 33 is slidably provided with a T-shaped sliding block 34, the outer end of the T-shaped sliding block 34 is hingedly connected with a screw rod 35, the surface of the hinged frame 22 is fixedly installed with a screw sleeve 36, and the screw rod 35 is threadedly inserted into the screw sleeve 36.

[0027] The edges and corners of the limiting plate 31 and the wear-resistant pad 32 are arc-shaped, the wear-resistant pad 32 is a wear-resistant layer made of plastic material, which has small friction with metal and can avoid scratching the surface of the profile to cause unnecessary scratches, the outer end of the screw rod 35 is provided with a knob with anti-skid lines for manual adjustment, by rotating the screw rod 35, the screw rod 35 and the screw sleeve 36 are in threaded action, the limiting plate 31 is rotated by the T-shaped sliding block 34, and the T-shaped sliding block 34 slides in the T-shaped sliding groove 33 to compensate for the displacement difference by moving, so as to change the inclination angle of the limiting plate 31, so as to be applicable to different sizes of disc-shaped profiles, and can also compensate for errors caused by installation and production problems. Before use, according to the diameter of the profile, first adjust the angle of each group of limiting plates 31, so that the profile can be centered and will not be excessively pressed when it is turned upward, and only needs to be fitted, a group of profiles can be placed on the upper side of the bottom die 2 for debugging in advance.

[0028] The working principle is that when in use, the disc-shaped profile is placed on the bottom die 2, and the profile is supported by the rollers 21 protruding from the upper surface of the bottom die 2, so that the profile is moved forward and backward through the rollers 21, reducing the friction with the surface of the bottom die 2. Then the position of the profile can be fine-tuned to align with the bottom die 2. Then the driving rod is pulled to drive the driving rod 30, so that the driving rod 30 drives the left side sleeve rod 27 to move to the left side. The sleeve rod 27 is driven by the upper and lower two groups of tooth rods 28 to rotate the gear 29, so that the gear 29 drives the other two groups of tooth rods 28 to move to the right side. When the two groups of sleeve rods 27 move away from each other, the connecting rod 26 pushes the sliding rod 24 to extend outward along the rod groove 25, and the hinge rod 23 is pushed to move away from the side of the bottom die 2, and the lower end of the hinge frame 22 is opened, and the upper side drives the limiting plate 31 to flip upward to contact and abut against the edge of the profile. The four groups of limiting plates 31 resist the profile from four directions to center the profile. Then the driving rod is used to drive the driving rod 30 to move the two groups of sleeve rods 27 close to each other, so that the lower end of the hinge frame 22 rotates to the side of the bottom die 2, and the limiting plate 31 is driven to reverse downward to be retracted. Finally, the hydraulic push rod is started, and the top frame 10 is driven by the hydraulic push rod to move downward, and the movable column 11 and the pressing rod 9 are driven to move downward, and the top die 5 also moves downward and abuts against the upper surface of the profile. As the top frame 10 continues to move downward, the movable column 11 presses the extension spring 13, and the force is transmitted to the top plate 4 through the sleeve column 12, so that the top die 5 can tightly press the profile. After the profile is subjected to sufficient pressure, the roller 21 is driven to move the wheel frame 19 downward, and the return spring 20 is compressed. After the roller 21 is retracted into the lifting groove 16, the profile abuts against the upper surface of the bottom die 2, and the profile is clamped by the top die 5. After the guide sleeve 14 continuously moves downward in the pressing rod 9, it abuts against the end of the top block 15 away from the module 6. As the force continues to be applied, the top block 15 is rotated and pushed to rotate, so that the inner end can rotate upward and lift the module 6. After the module 6 is lifted, it moves upward along the guide groove 8 through the guide block 7, and the center position of the profile is lifted. After the profile is formed, the top frame 10 is lifted by the hydraulic push rod. When the profile is not subjected to the force of the top die 5, the return spring 20 in the compressed state is lifted by the return force to make the roller 21 protrude from the surface of the bottom die 2 and lift the profile. At this time, the profile can be pulled out.

[0029] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features. These modifications or replacements do not change the essence of the corresponding technical solutions beyond the spirit and scope of the technical solutions of the embodiments of the present application.

[0030] In the description of the present application, it should be understood that the terms "front", "rear", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as a limitation on the present application.

[0031] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and it is intended that all changes and modifications which come within the meaning and range of equivalency of the claims are resolutely intended to be embraced thereby. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A metal chair leg punch forming mold set device, characterized by: The utility model provides a mould is provided with the bottom die (2) and the top die (5) of the bottom (1) and the top plate (4) of the top, and the bottom die (2) is provided with the guide block (7) of the two ends of the module (6) and the guide groove (8) of the inner wall of the bottom die (2) is adapted to the guide block (7), the top of the guide column (3) is installed through the telescopic component and is provided with the top frame (10) and the pressure rod (9) of the both ends of the top frame (10) is welded symmetrically, and the lower end of pressure rod (9) passes through the top plate (4), the bottom (1) is provided with the guide sleeve (14) of the upper end both sides symmetry of the bottom die (2) and the lower end of pressure rod (9) is movably inserted in the guide sleeve (14), the inside of the bottom (1) is rotatably installed two groups of top block (15), the upper surface of the bottom die (2) is equidistantly provided with multiple lifting grooves (16), the lifting groove (16) is provided with the gyro wheel (21), the upper side outer wall of the bottom die (2) is hingedly connected with the hinged frame (22), the bottom die (2) is symmetrically provided with two groups of sleeve rods (27), and the sleeve rod (27) is provided with the connecting rod assembly between the hinged frame (22), and the sleeve rod (27) is provided with the transmission assembly between two groups, one group of sleeve rod (27) is fixedly welded with the driving rod (30), and the driving rod (30) is movably inserted in the outer end of the bottom die (2), the upper end of the hinged frame (22) is installed with the limit plate (31) through the adjusting assembly.

2. The metal chair leg stamping forming die set device according to claim 1, characterized in that: The telescopic component includes movable column (11), the lower end of the top frame (10) is fixedly welded with movable column (11) at the four corners, the lower side of movable column (11) is movably sleeved with sleeve column (12), and the lower end of sleeve column (12) is fixedly welded on the upper end of guide column (3), the inside of sleeve column (12) is longitudinally provided with telescopic spring (13), and the upper and lower ends of telescopic spring (13) are respectively abutted with the lower end of movable column (11) and the inner wall of the lower end of sleeve column (12).

3. The metal chair leg stamping forming die set device according to claim 1, characterized in that: The bottom of the lifting groove (16) is fixedly installed with the fixed seat (17), and the upper end of the fixed seat (17) is movably inserted with the positioning rod (18), the upper end of the positioning rod (18) is fixedly welded with the wheel frame (19), the gyro wheel (21) is rotatably installed on the upper end of the wheel frame (19) through the center shaft, the upper surface of the gyro wheel (21) protrudes from the upper surface of the bottom die (2), the positioning rod (18) is sleeved with the reset spring (20), and the upper and lower ends of the reset spring (20) are respectively abutted with the wheel frame (19) and the fixed seat (17).

4. The metal chair leg stamping forming die set device according to claim 1, characterized in that: The connecting rod assembly comprises a hinged rod (23), the lower end of the hinged frame (22) is hingedly connected with the upper end of the hinged rod (23), the lower end of the hinged rod (23) is hingedly connected with a sliding rod (24), the inner end of the sliding rod (24) is rotatably connected with a connecting rod (26), and the connecting rod (26) is movably inserted into the end of a sleeve rod (27), the bottom die (2) is provided with a rod groove (25) with the same size as the sliding rod (24), and the sliding rod (24) slides in the rod groove (25).

5. The metal chair leg stamping forming die set device according to claim 1, wherein: The transmission assembly comprises a toothed rod (28), and the two ends of the sleeve rod (27) are fixedly connected with the toothed rod (28); the bottom die (2) is rotatably provided with a gear (29) through a rotating shaft; the toothed rods (28) at the ends of the left and right groups of sleeve rods (27) are arranged in a staggered manner, and the toothed rods (28) at the ends of the left and right groups of sleeve rods (27) are respectively engaged with the two sides of the gear (29).

6. The metal chair leg stamping forming die set device according to claim 1, wherein: The adjusting assembly comprises a wear-resistant pad (32), the lower end of the limiting plate (31) is rotatably installed at the middle position of the hinged frame (22), the surface of the limiting plate (31) is provided with the wear-resistant pad (32), the surface of the limiting plate (31) close to the hinged frame (22) is provided with a T-shaped sliding groove (33), and a T-shaped sliding block (34) is slidably arranged in the T-shaped sliding groove (33); the outer end of the T-shaped sliding block (34) is hingedly connected with a screw rod (35); the surface of the hinged frame (22) is fixedly installed with a screw sleeve (36); and the screw rod (35) is threadedly inserted into the screw sleeve (36).

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