A desk chair assembly arc punching machine

Abstract

This utility model discloses a punching machine for assembling school desks and chairs, relating to the field of punching machine technology. It includes a frame, on which a clamping unit, a grinding unit, a punching unit, and a pushing unit are fixedly mounted. The grinding unit and the punching unit are arranged opposite each other and located on opposite sides of the clamping unit. The centers of the frame, the pushing unit, and the clamping unit are on the same isometric plane. The beneficial effect lies in the buffering and dispersing of the vibration force during the punching process using a disc spring assembly, reducing the impact of vibration on processing quality. Furthermore, the combined structure of the buffer assembly, support sleeve, and guide rod supports and limits the punch mechanism and support rod, reducing the skewing of the punch mechanism during the punching process and the generation of end-face burrs caused by skewing. This ensures that the shearing force of the punch mechanism is evenly distributed, better processing of the tubing and improving the stability and processing quality of the punch mechanism during the punching process.

Description

Technical Field

[0001] This utility model relates to the field of arc punching machine technology, and in particular to an arc punching machine for assembling school desks and chairs. Background Technology

[0002] In daily work and study, modular desks and chairs have become indispensable office supplies. The production and processing of modular desks and chairs are also constantly being updated. In related technologies, the connection points of modular desks and chairs need to be welded. In order to make the structure of modular desks and chairs more robust, the horizontal beams are usually punched into an arc so that the punched end of the beam fits better with the stool legs or table legs, and then welding is carried out.

[0003] A search revealed that Chinese patent application CN220444744U discloses a punching machine for assembling modular school desks and chairs. It mainly uses a positioning mechanism to fix the crossbeam and then uses a drive component to drive the punching blade to punch the crossbeam, thereby improving the punching accuracy.

[0004] Compared with existing technologies in related fields, it can be seen that when the existing punch head contacts the pipe, the unevenness of the material inside the pipe will generate different resistance forces on the punch head, causing the punch head to deflect and resulting in burrs on the punched end face of the pipe, which affects the quality of the punching process. Utility Model Content

[0005] The purpose of this utility model is to provide a punching machine for assembling school desks and chairs in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A punching machine for assembling school desks and chairs includes a frame, on which a clamping unit, a grinding unit, a punching unit and a pushing unit are fixedly installed. The grinding unit and the punching unit are arranged opposite each other and are located on both sides of the clamping unit. The center positions of the frame, the pushing unit and the clamping unit are on the same isometric plane.

[0008] The punching unit includes a first support plate and a guide rod. The first support plate is fixedly mounted on the frame. A first hydraulic telescopic mechanism is fixedly mounted on the first support plate. A support rod is fixedly mounted on the telescopic end of the first hydraulic telescopic mechanism. A punch mechanism and a baffle are fixedly mounted on the support rod. The baffles are arranged in an orderly manner. The guide rod is slidably mounted on the first support plate. A support sleeve is fixedly mounted on the end of the guide rod. The support sleeve is located between the arranged baffles. A buffer assembly is fixedly mounted inside the support sleeve. The buffer assembly is slidably connected to the support rod.

[0009] Furthermore, the buffer assembly includes a disc spring assembly and a bushing. The two ends of the disc spring assembly are fixedly connected to the inner wall of the support sleeve and the bushing, respectively, and the bushing is slidably sleeved on the support rod.

[0010] Furthermore, the grinding unit includes a second support plate, which is fixedly mounted on the frame. A second hydraulic telescopic mechanism is fixedly mounted on the second support plate. A rotary power mechanism is fixedly mounted on the telescopic end of the second hydraulic telescopic mechanism. A wire brush roller is fixedly mounted on the output shaft of the rotary power mechanism.

[0011] Furthermore, a bracket is fixedly installed on the housing of the rotary power mechanism, and a dust collection hood is fixedly installed on the bracket.

[0012] Furthermore, the clamping unit includes a bidirectional vertical lifting mechanism, which is fixedly installed on the frame. Movable seats are installed at both ends of the bidirectional vertical lifting mechanism through threaded connection. A first pressure detection mechanism is fixedly installed on the opposite sides of the two movable seats. A magnetic suction seat is fixedly installed on the first pressure detection mechanism, and a clamping frame is magnetically connected to the magnetic suction seat.

[0013] Furthermore, the pushing unit includes a third support plate, on which a third hydraulic telescopic mechanism is fixedly installed. A second pressure detection mechanism is fixedly installed on the telescopic end of the third hydraulic telescopic mechanism, and the second pressure detection mechanism corresponds to the center position of the clamping frame.

[0014] Furthermore, an inclined guide plate and a placement groove are fixedly installed on the frame, and a collection box is slidably installed in the placement groove, with the collection box located at the lower end of the guide plate.

[0015] The advantages compared to existing technologies are as follows:

[0016] 1. The disc spring assembly buffers and disperses the vibration force during the punching process, reducing the impact of vibration on the processing quality. The combination structure of the buffer component, support sleeve and guide rod supports and limits the punch mechanism and support rod, reducing the deviation of the punch mechanism during the punching process and the generation of end face burrs caused by the deviation. This makes the shearing force of the punch mechanism evenly distributed, better processing of the pipe, and improving the stability and processing quality of the punch mechanism during the punching process.

[0017] 2. After the arc is punched, the pipe is pushed by the third hydraulic telescopic mechanism and the second pressure detection mechanism, so that the punched end face of the pipe is moved out of the clamping frame. The second hydraulic telescopic mechanism and the rotary power mechanism drive the wire brush roller to move and rotate back and forth at the punched end face of the pipe. The wire brush roller grinds the burrs at the punched position of the pipe, effectively improving the quality of the punched position of the pipe and facilitating better assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a first isometric structural schematic diagram of the punching machine for assembling school desks and chairs according to the present invention;

[0020] Figure 2 This utility model describes a punching machine for assembling school desks and chairs. Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 3 This is a schematic diagram of the second isometric structure of the punching machine for assembling school desks and chairs according to the present invention;

[0022] Figure 4 This is a schematic diagram of the connection structure of the first support plate, the first hydraulic telescopic mechanism, the support sleeve, and the punch mechanism of the punching machine for assembling school desks and chairs according to the present invention;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the support rod and support sleeve of the punching machine for assembling school desks and chairs according to the present invention;

[0024] Figure 6 This is a schematic diagram of the second support plate, the second hydraulic telescopic mechanism, and the steel wire brush roller connection structure of the arc punching machine for assembling school desks and chairs described in this utility model;

[0025] Figure 7 This is a schematic diagram of the bidirectional vertical lifting mechanism, movable seat, and clamping frame connection structure of the arc punching machine for assembling school desks and chairs described in this utility model.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1. Frame; 2. Guide plate; 301. First support plate; 302. First hydraulic telescopic mechanism; 303. Support rod; 304. Punch mechanism; 305. Baffle; 306. Support sleeve; 307. Disc spring assembly; 308. Bushing; 309. Guide rod; 401. Second support plate; 402. Second hydraulic telescopic mechanism; 403. Rotary power mechanism; 404. Wire brush roller; 501. Bidirectional vertical lifting mechanism; 502. Movable seat; 503. First pressure detection mechanism; 504. Magnetic seat; 505. Clamping frame; 601. Third support plate; 602. Third hydraulic telescopic mechanism; 603. Second pressure detection mechanism; 7. Collection box; 8. Bracket; 9. Dust collection hood. Detailed Implementation

[0028] like Figures 1-7 As shown, a punching machine for assembling school desks and chairs includes a frame 1. A clamping unit, a grinding unit, a punching unit, and a pushing unit are fixedly installed on the frame 1. The grinding unit and the punching unit are arranged opposite each other and are located on both sides of the clamping unit. The center positions of the frame 1, the pushing unit, and the clamping unit are on the same isometric plane. The clamping unit clamps and fixes the end of the tube that needs to be punched. The punching unit punches the tube. After the processing is completed, the pushing unit pushes the tube so that the punched position of the tube moves and is exposed. The grinding unit grinds the punched position and removes the burrs from the punching process on the tube to ensure the quality of the tube punching process.

[0029] like Figures 1-5 As shown, the punching unit includes a first support plate 301 and a guide rod 309. The first support plate 301 is fixedly mounted on the frame 1. A first hydraulic telescopic mechanism 302 is fixedly mounted on the first support plate 301. A support rod 303 is fixedly mounted on the telescopic end of the first hydraulic telescopic mechanism 302. A punch mechanism 304 and baffles 305 are fixedly mounted on the support rod 303. The baffles 305 are arranged in an array. The guide rod 309 is slidably mounted on the first support plate 301. A support sleeve 306 is fixedly mounted on the end of the guide rod 309. The support sleeve 306 is located between the arranged baffles 305. A buffer assembly is fixedly mounted inside the support sleeve 306. The buffer assembly is slidably connected to the support rod 303. The first hydraulic telescopic mechanism 302 and the punch mechanism 304 operate using existing technology. Before processing, according to the size of the pipe and the required punching size, a suitable punch mechanism 304 is selected and installed on the support rod 303. After the pipe is clamped by the clamping unit, the first... The hydraulic telescopic mechanism 302 drives the punch mechanism 304 to move via the support rod 303. Simultaneously, the support rod 303 drives the support sleeve 306, buffer assembly, and guide rod 309 to move along with the punch mechanism 304 via the baffle 305. During the movement, the guide rod 309 improves the stability of the support sleeve 306. The punch mechanism 304 performs arc punching on the pipe. During the arc punching process, the buffer assembly disperses the vibration force of the punch mechanism 304, reducing the impact of vibration on the processing quality. The combined structure of the buffer assembly, support sleeve 306, and guide rod 309 supports and limits the punch mechanism 304 and the support rod 303, reducing the skewing of the punch mechanism 304 during the arc punching process and the generation of end face burrs caused by skewing. This ensures that the shearing force of the punch mechanism 304 is evenly distributed, better processing the pipe and improving the stability and processing quality of the punch mechanism 304 during the arc punching process.

[0030] like Figure 5As shown, the buffer assembly includes a disc spring assembly 307 and a bushing 308. The two ends of the disc spring assembly 307 are fixedly connected to the inner wall of the support sleeve 306 and the bushing 308, respectively. The bushing 308 is slidably sleeved on the support rod 303. The disc spring assembly 307 operates using existing technology. The disc spring assembly 307 provides multi-angle buffering and limiting of the support rod 303 in the circumferential direction through the bushing 308. When the punch mechanism 304 deviates during the punching process of the pipe, the punch mechanism 304 causes the support rod 303 to tilt. The support rod 303, through the bushing 308, provides buffering and limiting of the support rod 303. The disc spring assembly 307 is compressed. The combined structure of the bushing 308 and the disc spring assembly 307 buffers and disperses the vibration force of the support rod 303 and the punch mechanism 304, and provides reverse support for the support rod 303 and the punch mechanism 304. This effectively improves the stability of the support rod 303 and the punch mechanism 304, reduces the offset of the support rod 303 and the punch mechanism 304 during the arc-cutting process, and allows the punch mechanism 304 to better perform arc-cutting on the pipe, reducing the generation of burrs at the arc-cutting position, and effectively improving the quality and efficiency of processing.

[0031] like Figure 1 , Figure 2 , Figure 6 As shown, the grinding unit includes a second support plate 401, which is fixedly mounted on the frame 1. A second hydraulic telescopic mechanism 402 is fixedly mounted on the second support plate 401. A rotary power mechanism 403 is fixedly mounted on the telescopic end of the second hydraulic telescopic mechanism 402. A wire brush roller 404 is fixedly mounted on the output shaft of the rotary power mechanism 403. The second hydraulic telescopic mechanism 402 and the rotary power mechanism 403 operate using existing technology. According to the size of the pipe arc, a suitable wire brush roller 404 is selected and installed on the output shaft of the rotary power mechanism 403. After the pipe arc processing is completed, the second hydraulic telescopic mechanism 402 drives the wire brush roller 404 to move to the arc position of the pipe through the rotary power mechanism 403, and moves back and forth at the arc position of the pipe. At the same time, the rotary power mechanism 403 drives the wire brush roller 404 to rotate, and the wire brush roller 404 grinds the burrs at the arc position of the pipe, effectively improving the quality of the arc position of the pipe and facilitating better assembly.

[0032] like Figure 2 , Figure 6 As shown, a bracket 8 is fixedly installed on the housing of the rotary power mechanism 403, and a dust collection hood 9 is fixedly installed on the bracket 8. The dust collection hood 9 is connected to an external dust collection device. When the wire brush roller 404 grinds the pipe after arcing, the rotary power mechanism 403 drives the dust collection hood 9 to move through the bracket 8, so that the dust collection hood 9 always moves with the wire brush roller 404. The external dust collection device absorbs and treats the debris during the grinding of the wire brush roller 404 through the dust collection hood 9, so as to avoid pollution to the on-site environment and avoid the accumulation of debris affecting the quality of the arcing process of the pipe.

[0033] like Figures 1-3 , Figure 7 As shown, the clamping unit includes a bidirectional vertical lifting mechanism 501, which is fixedly mounted on the frame 1. Movable seats 502 are threaded onto both ends of the bidirectional vertical lifting mechanism 501. A first pressure detection mechanism 503 is fixedly mounted on the opposite sides of the two movable seats 502. A magnetic suction seat 504 is fixedly mounted on the first pressure detection mechanism 503, and a clamping frame 505 is magnetically connected to the magnetic suction seat 504. The bidirectional vertical lifting mechanism 501, the first pressure detection mechanism 503, and the magnetic suction seat 504 operate using existing technology. A suitable clamping frame 505 is selected based on the size of the arc-stamped pipe, and the clamping frame 505 is installed... The clamping frame 505 is attached to the magnetic base 504 and fixed by the magnetic base 504. The magnetic base 504 improves the convenience of disassembling and installing the clamping frame 505. After the pipe is placed in place during the processing, the bidirectional vertical lifting mechanism 501 drives the clamping frame 505 to move through the movable base 502, the first pressure detection mechanism 503 and the magnetic base 504, so that the clamping frame 505 fits against the pipe, thereby clamping and fixing the pipe. The first pressure detection mechanism 503 detects the force applied to the pipe by the clamping frame 505, which can not only ensure effective fixing of the pipe and prevent the pipe from sliding, but also avoid damage to the pipe caused by excessive clamping force.

[0034] like Figure 1 , Figure 3 As shown, the pushing unit includes a third support plate 601, on which a third hydraulic telescopic mechanism 602 is fixedly installed. A second pressure detection mechanism 603 is fixedly installed on the telescopic end of the third hydraulic telescopic mechanism 602. The second pressure detection mechanism 603 and the clamping frame 505 are positioned corresponding to each other. The third hydraulic telescopic mechanism 602 and the second pressure detection mechanism 603 operate using existing technology. After the pipe is punched, the third hydraulic telescopic mechanism 602 drives the second pressure detection mechanism 603 to move. The detection value of the second pressure detection mechanism 603 determines that it has collided with the pipe. At this time, the clamping unit releases the clamping of the pipe. The third hydraulic telescopic mechanism 602 and the second pressure detection mechanism 603 move the punched position of the pipe out of the clamping frame 505, which facilitates the processing of burrs at the punched position of the pipe and improves the processing efficiency.

[0035] like Figure 1As shown, an inclined guide plate 2 and a placement groove are fixedly installed on the frame 1. A collection box 7 is slidably installed in the placement groove. The collection box 7 is located at the lower end of the guide plate 2. Before operation, the collection box 7 is placed into the placement groove on the frame 1. Waste pipes that fall off during arc processing fall onto the guide plate 2. The guide plate 2 guides the waste pipes into the collection box 7, thus completing the collection of waste pipes that fall off during arc processing. This prevents them from rolling out and polluting the site environment, and facilitates subsequent processing, effectively improving the convenience of processing.

[0036] Working principle: such as Figures 1-3 , Figure 7 As shown, the pipe to be punched is placed between two clamping frames 505. The bidirectional vertical lifting mechanism 501 moves the clamping frames 505 through the movable seat 502, the first pressure detection mechanism 503 and the magnetic seat 504, so that the clamping frames 505 fit against the pipe, thereby clamping and fixing the pipe. The first pressure detection mechanism 503 detects the force applied to the pipe by the clamping frames 505.

[0037] like Figures 1-5 As shown, the first hydraulic telescopic mechanism 302 drives the punch mechanism 304 to move via the support rod 303. Simultaneously, the support rod 303 drives the support sleeve 306, disc spring assembly 307, bushing 308, and guide rod 309 to move along with the punch mechanism 304 via the baffle 305. During the movement, the guide rod 309 improves the stability of the support sleeve 306. The punch mechanism 304 performs arc punching on the pipe. During the arc punching process, when the punch mechanism 304 contacts the pipe, it will deflect due to the reverse deflection force. The punch mechanism 304 drives the support rod 303 to deflect. The support rod 303 compresses the disc spring assembly 307 via the bushing 308. The combined structure of the bushing 308 and the disc spring assembly 307 buffers and disperses the vibration force of the support rod 303 and the punch mechanism 304, and provides reverse support for the support rod 303 and the punch mechanism 304, effectively improving the stability of the support rod 303 and the punch mechanism 304.

[0038] like Figures 1-3 , Figure 7 As shown, after the arc-cutting process is completed, the bidirectional vertical lifting mechanism 501 drives the movable seat 502 to move in the opposite direction, reducing the clamping force of the clamping frame 505 on the pipe. The third hydraulic telescopic mechanism 602 drives the second pressure detection mechanism 603 to move. The detection value of the second pressure detection mechanism 603 determines that the second pressure detection mechanism 603 has collided with the pipe. The third hydraulic telescopic mechanism 602 and the second pressure detection mechanism 603 push the pipe, causing the arc-cutting position of the pipe to move out of the clamping frame 505. After the pipe moves a set distance, the clamping frame 505 clamps and fixes the pipe again.

[0039] like Figure 1 , Figure 2 , Figure 6 As shown, the second hydraulic telescopic mechanism 402 drives the wire brush roller 404 to move to the arc position of the pipe through the rotary power mechanism 403, and moves back and forth at the arc position of the pipe. At the same time, the rotary power mechanism 403 drives the wire brush roller 404 to rotate, and the wire brush roller 404 grinds the burrs at the arc position of the pipe.

[0040] like Figure 1 , Figure 2 , Figure 6 As shown, during the arc-punching process, the waste pipe material falling off the arc-punching process is guided into the collection box 7 by the guide plate 2, thus completing the collection of the waste pipe material falling off the arc-punching process. During the grinding process of the wire brush roller 404, the rotating power mechanism 403 drives the dust suction hood 9 to move through the bracket 8, so that the dust suction hood 9 always moves with the wire brush roller 404. The external dust suction device absorbs and treats the debris during the grinding of the wire brush roller 404 through the dust suction hood 9, avoiding pollution to the on-site environment.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A punching machine for assembling school desks and chairs, characterized in that, Includes a frame (1), on which a clamping unit, a grinding unit, a punching unit and a pushing unit are fixedly installed. The grinding unit and the punching unit are arranged opposite to each other and are located on both sides of the clamping unit. The center positions of the frame (1), the pushing unit and the clamping unit are on the same isometric plane. The punching unit includes a first support plate (301) and a guide rod (309). The first support plate (301) is fixedly installed on the frame (1). A first hydraulic telescopic mechanism (302) is fixedly installed on the first support plate (301). A support rod (303) is fixedly installed on the telescopic end of the first hydraulic telescopic mechanism (302). A punch mechanism (304) and a baffle (305) are fixedly installed on the support rod (303). The baffles (305) are arranged in a row. The guide rod (309) is slidably installed on the first support plate (301). A support sleeve (306) is fixedly installed at the end of the guide rod (309). The support sleeve (306) is located between the arranged baffles (305). A buffer assembly is fixedly installed inside the support sleeve (306). The buffer assembly is slidably connected to the support rod (303).

2. The punching machine for assembling school desks and chairs according to claim 1, characterized in that: The buffer assembly includes a disc spring assembly (307) and a bushing (308). The two ends of the disc spring assembly (307) are fixedly connected to the inner wall of the support sleeve (306) and the bushing (308), respectively. The bushing (308) is slidably sleeved on the support rod (303).

3. The punching machine for assembling school desks and chairs according to claim 1, characterized in that: The grinding unit includes a second support plate (401), which is fixedly mounted on the frame (1). A second hydraulic telescopic mechanism (402) is fixedly mounted on the second support plate (401). A rotary power mechanism (403) is fixedly mounted on the telescopic end of the second hydraulic telescopic mechanism (402). A wire brush roller (404) is fixedly mounted on the output shaft of the rotary power mechanism (403).

4. The punching machine for assembling school desks and chairs according to claim 3, characterized in that: A bracket (8) is fixedly installed on the housing of the rotary power mechanism (403), and a dust collection cover (9) is fixedly installed on the bracket (8).

5. The punching machine for assembling school desks and chairs according to claim 1, characterized in that: The clamping unit includes a bidirectional vertical lifting mechanism (501), which is fixedly installed on the frame (1). Movable seats (502) are installed at both ends of the bidirectional vertical lifting mechanism (501) through threaded connection. A first pressure detection mechanism (503) is fixedly installed on the opposite side of the two movable seats (502). A magnetic suction seat (504) is fixedly installed on the first pressure detection mechanism (503). A clamping frame (505) is magnetically connected to the magnetic suction seat (504).

6. The punching machine for assembling school desks and chairs according to claim 5, characterized in that: The pushing unit includes a third support plate (601), on which a third hydraulic telescopic mechanism (602) is fixedly installed. A second pressure detection mechanism (603) is fixedly installed on the telescopic end of the third hydraulic telescopic mechanism (602). The second pressure detection mechanism (603) and the center position of the clamping frame (505) correspond to each other.

7. The punching machine for assembling school desks and chairs according to claim 1, characterized in that: An inclined guide plate (2) and a placement groove are fixedly installed on the frame (1). A collection box (7) is slidably installed in the placement groove and is located at the lower end of the guide plate (2).

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