Automatic pipe cutting machine for table and chair

Abstract

The utility model discloses a kind of automatic pipe cutting machines for table and chair, including base, the base top middle part is provided with cutting assembly, the cutting knife bottom is provided with limiting component, the limiting component includes U-shaped fixing frame, the base top is opened with the guiding sliding slot for the sliding adaptation of U-shaped fixing frame along longitudinal direction, the U-shaped fixing frame front end is fixedly connected with handle, the device is by damper, reset spring and the limiting component that the pressing plate of rubber preloading pad and detachable U-shaped fixing frame are set in hydraulic plate bottom, realize efficient pipe fixing, when working, steel pipe is placed on U-shaped fixing frame, then hydraulic pressing plate is driven by hydraulic cylinder and pressed down, pressing plate first contacts pipe by rubber preloading pad, the elasticity and surface protrusion of butyronitrile rubber are used, and flexible adaptation different pipe diameter, material pipe, stable preloading avoids sliding, ensure that the cut is smooth, improve subsequent table and chair assembly precision, maintain pipe structure integrity.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe processing equipment, specifically to an automatic pipe cutting machine for tables and chairs. Background Technology

[0002] In the field of tubing processing for table and chair manufacturing, the fixing effect and cutting length control accuracy of automatic tube cutting machines directly affect the processing quality and production efficiency of table and chair tubing. The current limiting components of traditional automatic tube cutting machines have obvious shortcomings in fixing tubes and adapting to different cutting length requirements, making it difficult to meet the requirements of fine processing.

[0003] On the one hand, existing automatic pipe cutting machines rely heavily on rigid clamping structures for fixing pipes. Although some machines have attempted to introduce buffer components, these designs have flaws. For example, relying solely on springs for buffering results in uncontrollable rebound force after the spring is compressed when the cutter impacts the pipe, easily causing the pipe to sway back and forth. Furthermore, the springs experience rapid elastic decay and poor stability due to prolonged exposure to high-frequency impacts. Simultaneously, traditional structures lack adaptability to pipes of different diameters and materials, making it difficult to clamp steel pipes. This leads to pipe slippage caused by the cutter impact, resulting in skewed cuts. Dimensional deviations disrupt the flatness of the pipe ends, increasing the difficulty of fitting them during subsequent table and chair assembly. On the other hand, traditional pipe cutting machines have problems with complex structures and inconvenient operation when fixing the baffle after adjusting the cutting length. Common fixing methods such as tightening bolts and nuts require operators to repeatedly disassemble and assemble fasteners, which is time-consuming and labor-intensive. Some quick-fixing structures using clips and slots either have complicated structural designs that lead to cumbersome operation steps or insufficient locking strength, causing the baffle to loosen and shift, resulting in the actual cutting length deviating from the preset value.

[0004] Therefore, developing an automatic pipe cutting machine with pre-compression and fixing of pipes of different specifications and precise cutting length adaptation function is the key to improving the processing accuracy and efficiency of table and chair pipes, and is of great significance to promoting the automation and precision production of table and chair manufacturing. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an automatic pipe cutting machine for tables and chairs, which aims to solve the problems of difficulty in pre-pressing and fixing pipes of different specifications and lack of precise cutting length adaptation function, and become the key to improving the processing accuracy and efficiency of table and chair pipes, which is of great significance to promoting the automation and precision production of table and chair manufacturing.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An automatic pipe cutting machine for tables and chairs includes a base. A cutting assembly is disposed at the center of the top of the base. The cutting assembly includes support plates fixedly connected to the top of the base and near the front and rear sides. The tops of the two support plates are fixedly connected to the same top plate. A hydraulic cylinder is fixedly connected to the center of the top of the top plate. A cutter is slidably connected to one end of the two support plates that are close to each other. A hydraulic plate is fixedly connected to the top of the cutter. The output end of the hydraulic cylinder passes through the top plate and is fixedly connected to the top of the hydraulic plate. A limit assembly is disposed at the bottom of the cutter. The limit assembly includes a U-shaped fixing frame. A guide groove for sliding adaptation of the U-shaped fixing frame is opened in the longitudinal direction on the top of the base. A handle is fixedly connected to the front end of the U-shaped fixing frame.

[0008] Preferably, the limiting assembly further includes two dampers fixedly connected to the bottom of the hydraulic plate and located on the left and right sides of the cutter. A pressure plate is fixedly connected to the bottom of the damper, and a return spring is sleeved on the outside of the damper.

[0009] Preferably, a rubber pre-compression pad is fixedly connected to the bottom of the pressure plate, and the rubber pre-compression pad is made of nitrile rubber.

[0010] Preferably, the base has two side plates fixedly connected to the top and both sides of the cutting assembly. The two side plates on the same side are close to the front and rear sides of the base, respectively. The front ends of the two side plates on the right side are provided with rectangular through holes, and a fixing assembly is provided between the two side plates on the right side.

[0011] Preferably, the fixing component includes a slider that is slidably connected inside the rectangular through hole, and a baffle is provided between the two side plates on the right side and above the base. The front and rear sides of the baffle are respectively fixedly connected to one end of the two sliders that are close to each other.

[0012] Preferably, the fixing assembly further includes a drive motor fixedly connected to the top of the base. The drive motor is located on the right side of the baffle. A threaded sleeve is fixedly connected to the output end of the drive motor. A threaded rod is threadedly connected inside the threaded sleeve. The end of the threaded rod away from the drive motor is located outside the threaded sleeve and is fixedly connected to the side wall of the baffle.

[0013] Preferably, the top of the two side plates on the right side is provided with a scale groove, and the top of the baffle and near the front and rear sides are provided with an indicator groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) This device achieves efficient pipe fixing by setting a limiting component consisting of a damper, a return spring, a pressure plate with a rubber pre-pressure pad, and a detachable U-shaped fixing frame at the bottom of the hydraulic plate. During operation, the steel pipe is placed on the U-shaped fixing frame, and then the hydraulic plate is driven down by the hydraulic cylinder. The pressure plate first contacts the pipe through the rubber pre-pressure pad. Utilizing the elasticity and surface protrusion of the nitrile rubber, it flexibly adapts to pipes of different diameters and materials, stabilizes the pre-pressure, and avoids slippage. The damper and the return spring work together. The damper suppresses the pipe vibration caused by the impact of the cutter and avoids small displacement. The return spring helps the pressure plate to quickly return to its original position after cutting, preparing for the next cut. This not only solves the problem of deformation of thin-walled pipes due to rigid clamping, but also ensures that thick-walled pipes do not slip when impacted, ensuring a flat cut, improving the subsequent assembly accuracy of tables and chairs, and maintaining the integrity of the pipe structure.

[0016] (2) This device adapts to different cutting lengths through a fixed assembly consisting of a drive motor, a threaded sleeve, a threaded rod, a baffle, and a side plate with a graduated groove and an indicator groove. During operation, the drive motor drives the threaded sleeve to rotate, and the threaded rod moves relative to the sleeve due to the threaded connection, pushing the baffle to slide along the rectangular through hole of the side plate. The graduated groove on the top of the side plate cooperates with the indicator groove of the baffle. The operator can accurately control the position of the baffle according to the required cutting length of the table and chair tubing, and realize the length control linked with the cutting action. There is no need for manual measurement and marking. The adjustment accuracy is high, the operation is convenient, and it can quickly and stably adapt to diverse cutting needs, reduce production adjustment time, reduce labor costs and defect rate, and promote the automation and precision production of table and chair manufacturing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the pipe cutting machine;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of a pipe cutting machine;

[0019] Figure 3 This is a schematic diagram of the structure at section A of the pipe cutting machine;

[0020] Figure 4 This is a top view of the pipe cutting machine.

[0021] In the diagram: 101, base; 102, side plate; 2, cutting assembly; 201, support plate; 202, top plate; 203, hydraulic cylinder; 204, cutter; 205, hydraulic plate; 3, limiting assembly; 301, damper; 302, pressure plate; 303, return spring; 304, U-shaped fixing bracket; 305, handle; 4, fixing assembly; 401, baffle; 402, drive motor; 403, threaded sleeve; 404, threaded rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Example:

[0024] Please see Figures 1-4 This utility model discloses an automatic pipe cutting machine for tables and chairs, including a base 101. A cutting assembly 2 is provided at the middle of the top of the base 101. The cutting assembly 2 includes support plates 201 fixedly connected to the top of the base 101 and close to the front and rear sides. The top of the two support plates 201 is fixedly connected to the same top plate 202. A hydraulic cylinder 203 is fixedly connected to the center of the top of the top of the top plate 202. A cutter 204 is slidably connected to one end of the two support plates 201 that is close to each other. A hydraulic plate 205 is fixedly connected to the top of the cutter 204. The output end of the hydraulic cylinder 203 passes through the top plate 202 and is fixedly connected to the top of the hydraulic plate 205. A limit assembly 3 is provided at the bottom of the cutter 204. The limit assembly 3 includes a U-shaped fixing frame 304. A guide is provided in the longitudinal direction on the top of the base 101 for the U-shaped fixing frame 304 to slide and adapt. A handle 305 is fixedly connected to the front end of the U-shaped fixing frame 304 via the sliding groove. The hydraulic cylinder 203 outputs power to drive the hydraulic plate 205 to drive the cutter 204 to slide along the support plate 201 to perform the cutting action. At the same time, the U-shaped fixing frame 304 can be pulled out by the handle 305, so that it slides along the guide groove opened longitudinally on the top of the base 101 to achieve quick loading and unloading. The U-shaped fixing frame 304 can be quickly replaced with the corresponding specifications of steel pipes with different diameters and wall thicknesses through this pull-out structure. By utilizing the sliding adaptation relationship between the guide groove and the U-shaped fixing frame 304, it still maintains accurate positioning and stable support after replacement, so that the cutter 204 and the limiting component 3 can continue to work together efficiently to complete the cutting. This allows one machine to be compatible with the processing needs of multiple specifications of steel pipes, significantly improving the versatility and processing flexibility of the equipment, and reducing the equipment procurement and maintenance costs of enterprises.

[0025] As one implementation method of this embodiment, such as Figure 2As shown, the limiting component 3 also includes two dampers 301 fixedly connected to the bottom of the hydraulic plate 205 and located on the left and right sides of the cutter 204. A pressure plate 302 is fixedly connected to the bottom of the damper 301, and a return spring 303 is sleeved on the outside of the damper 301. The damper 301 is synchronously driven to contact the pipe with the pressure plate 302 as the hydraulic plate 205 moves downward. The elastic deformation of the return spring 303 provides pre-tightening buffer force, which, together with the damper 301, suppresses rebound oscillation, achieving flexible clamping and stable support before pipe cutting. At the same time, the cutter 204 completes the cutting action between the two pressure plates 302. After the cutting is completed, the hydraulic plate 205 moves upward, and the return spring 303 pushes the pressure plate 302 to automatically reset and loosen the clamp. This structural design effectively avoids rigid impact damage to the pipe surface through the dual mechanism of elastic buffering and damping control, improves cutting accuracy and surface quality, and shortens loading and unloading time. In conjunction with the quick replacement characteristics of the U-shaped fixing frame 304, it significantly enhances the equipment's adaptability to different specifications of pipes and processing efficiency.

[0026] As one implementation method of this embodiment, such as Figure 3 As shown, a rubber pre-pressure pad is fixedly connected to the bottom of the pressure plate 302. The rubber pre-pressure pad is made of nitrile rubber. By fixing the nitrile rubber pre-pressure pad to the bottom of the pressure plate 302, the good wear resistance, oil resistance and elasticity of nitrile rubber are utilized. When the pressure plate 302 is pressed down before cutting, the rubber pre-pressure pad can closely fit the surface of pipes of different diameters and materials. Its elastic deformation can apply uniform pre-pressure to the pipe, avoiding rigid contact that could cause pipe deformation. At the same time, it increases the friction between the pipe and the pipe, preventing the pipe from sliding during the cutting process, improving the fixing effect on the pipe, ensuring the stability of the pipe during cutting, thereby improving cutting accuracy and quality and reducing the scrap rate.

[0027] As one implementation method of this embodiment, such as Figure 2 As shown, two side plates 102 are fixedly connected to the top of the base 101 and to both sides of the cutting assembly 2. The two side plates 102 on the same side are close to the front and rear sides of the base 101 respectively. The front ends of the two side plates 102 on the right side are provided with rectangular through holes. A fixing assembly 4 is provided between the two side plates 102 on the right side. By fixing the side plates 102 on both sides of the cutting assembly 2 on the top of the base 101 and opening the rectangular through holes at the front ends of the two side plates 102 on the right side, the installation base and sliding track of the fixing assembly 4 are constructed. The rectangular through holes provide sliding guidance for the slider and baffle 401 in the subsequent fixing assembly 4, and provide structural support for the length adjustment and fixing of the pipe. This facilitates quick adjustment of the pipe cutting position, improves the adaptability of the pipe cutting machine to various pipe cutting lengths, and increases processing efficiency and flexibility.

[0028] As one implementation method of this embodiment, such as Figure 2As shown, the fixing component 4 includes a slider that is slidably connected inside the rectangular through hole. A baffle 401 is provided between the two side plates 102 on the right side and above the base 101. The front and rear sides of the baffle 401 are fixedly connected to the ends of the two sliders that are close to each other. By sliding the sliders into the rectangular through holes of the side plates 102 and fixing the front and rear sides of the baffle 401 to the sliders, a sliding positioning structure is constructed. When it is necessary to adjust the pipe cutting length, the slider slides in the rectangular through hole, driving the baffle 401 to move horizontally above the base 101. The position of the baffle 401 can be adjusted quickly and accurately, providing a reliable positioning blocking point for pipes of different lengths, ensuring the accuracy of the pipe cutting position each time, thereby improving the adaptability of the pipe cutting machine to diverse cutting length requirements, and improving cutting efficiency and finished product qualification rate.

[0029] As one implementation method of this embodiment, such as Figure 2 As shown, the fixing assembly 2 also includes a drive motor 402 fixedly connected to the top of the base 101. The drive motor 402 is located on the right side of the baffle 401. A threaded sleeve 403 is fixedly connected to the output end of the drive motor 402. A threaded rod 404 is threadedly connected inside the threaded sleeve 403. The end of the threaded rod 404 away from the drive motor 402 is located outside the threaded sleeve 403 and fixedly connected to the side wall of the baffle 401. The drive motor 402 at the top of the base 101 drives the threaded sleeve 403 to rotate, and the threaded rod 404 and the threaded sleeve 403 rotate together. The threaded transmission principle of 3 converts rotational motion into linear motion. One end of the threaded rod 404 is fixedly connected to the side wall of the baffle 401. When the threaded sleeve 403 rotates, the threaded rod 404 moves axially, thereby driving the baffle 401 to slide smoothly under the guidance of the rectangular through hole of the side plate 102. This realizes the automated and precise adjustment of the position of the baffle 401. Compared with manual adjustment, it greatly improves the adjustment efficiency and accuracy, can quickly adapt to the cutting needs of table and chair tubes of different lengths, effectively reduces manual operation errors, and improves the intelligence and processing stability of the tube cutting machine.

[0030] As one implementation method of this embodiment, such as Figure 4 As shown, the tops of the two side plates 102 on the right side are provided with scale grooves, and the top of the baffle 401 and near the front and rear sides are provided with indicator grooves. By providing scale grooves on the tops of the two side plates 102 on the right side and indicator grooves on the top of the baffle 401 near the front and rear sides, a visual length adjustment structure is constructed. When the drive motor 402 moves the baffle 401, the relative position of the indicator groove and the scale groove changes. The operator can intuitively read the value of the scale groove corresponding to the indicator groove, thereby accurately determining the position of the baffle 401. This realizes the visualization and precise quantification of pipe cutting length adjustment, reduces the difficulty of operation, reduces manual measurement errors, and makes the positioning and adjustment of pipes of different lengths more convenient and efficient, improving the ease of use and cutting accuracy of the pipe cutter.

[0031] Working principle:

[0032] The pipe is pre-compressed by a limiting assembly consisting of a damper 301, a return spring 303, a pressure plate 302, a nitrile rubber pre-compression pad, and a U-shaped fixing frame at the bottom of the hydraulic plate 205. Before cutting, the U-shaped fixing frame 304 is pulled out by the handle 305, allowing it to slide along the guide groove longitudinally opened at the top of the base 101 for quick loading and unloading. The steel pipe is placed into the base 101 and the U-shaped fixing frame 304, and then the hydraulic plate 205 is driven downward by the hydraulic cylinder 203, with the pressure plate 302 contacting the pipe first. The nitrile rubber preload pad, with its good elasticity and wear resistance, fits tightly against the pipe surface and applies uniform preload to the pipe. This preload effectively prevents the pipe from slipping during cutting and avoids pipe deformation caused by rigid clamping. At the same time, the damper 301 and the return spring 303 work together. The damper 301 absorbs the vibration generated during cutting and prevents the vibration from being transmitted to the pipe and causing displacement. The return spring 303 quickly assists the pressure plate 302 in returning to its original position after cutting, preparing for the next cut.

[0033] The cutting length is controlled by a system consisting of side plates 102, drive motor 402, threaded sleeve 403, threaded rod 404, baffle 401, and scale groove and indicator groove. The side plates 102 on both sides of the top of the base 101 provide the mounting base for the fixing component 4. The rectangular through hole at the front end of the right side plate 102 allows the slider to drive the baffle 401 to slide. When it is necessary to adjust the pipe cutting length, the drive motor 402 starts and drives the threaded sleeve 403 to rotate. Since the threaded rod 404 is threadedly connected to the threaded sleeve 403, the rotational motion is converted into linear motion, which in turn pushes the baffle 401 to move horizontally along the side plate 102. At the same time, the scale groove on the top of the side plate 102 and the indicator groove on the top of the baffle 401 cooperate with each other. The fluorescent coating at the bottom of the indicator groove and the scale groove can clearly display the corresponding scale in the low light environment, so that the operator can accurately determine the position of the baffle 401.

[0034] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An automatic pipe cutting machine for tables and chairs, characterized in that: The base (101) includes a base (101), and a cutting assembly (2) is provided at the middle of the top of the base (101). The cutting assembly (2) includes a support plate (201) fixedly connected to the top of the base (101) and close to the front and rear sides. The tops of the two support plates (201) are fixedly connected to the same top plate (202). A hydraulic cylinder (203) is fixedly connected to the center of the top of the top plate (202). A cutter (204) is slidably connected to one end of the two support plates (201) that is close to each other. 204) A hydraulic plate (205) is fixedly connected to the top. The output end of the hydraulic cylinder (203) passes through the top plate (202) and is fixedly connected to the top of the hydraulic plate (205). A limit component (3) is provided at the bottom of the cutter (204). The limit component (3) includes a U-shaped fixing frame (304). A guide groove is provided on the top of the base (101) in the longitudinal direction for the U-shaped fixing frame (304) to slide and adapt. A handle (305) is fixedly connected to the front end of the U-shaped fixing frame (304).

2. The automatic pipe cutting machine for tables and chairs according to claim 1, characterized in that: The limiting component (3) also includes two dampers (301) fixedly connected to the bottom of the hydraulic plate (205) and located on the left and right sides of the cutter (204). A pressure plate (302) is fixedly connected to the bottom of the damper (301), and a return spring (303) is sleeved on the outside of the damper (301).

3. The automatic pipe cutting machine for tables and chairs according to claim 2, characterized in that: A rubber pre-pressure pad is fixedly connected to the bottom of the pressure plate (302), and the rubber pre-pressure pad is made of nitrile rubber.

4. The automatic pipe cutting machine for tables and chairs according to claim 1, characterized in that: Two side plates (102) are fixedly connected to the top of the base (101) and on both sides of the cutting assembly (2). The two side plates (102) on the same side are close to the front and rear sides of the base (101) respectively. The front ends of the two side plates (102) on the right side are provided with rectangular through holes. A fixing assembly (4) is provided between the two side plates (102) on the right side.

5. An automatic pipe cutting machine for tables and chairs according to claim 4, characterized in that: The fixing component (4) includes a slider that is slidably connected inside the rectangular through hole. A baffle (401) is provided between the two side plates (102) on the right side and above the base (101). The front and rear sides of the baffle (401) are respectively fixedly connected to one end of the two sliders that are close to each other.

6. An automatic pipe cutting machine for tables and chairs according to claim 5, characterized in that: The fixing component (4) also includes a drive motor (402) fixedly connected to the top of the base (101). The drive motor (402) is located on the right side of the baffle (401). The output end of the drive motor (402) is fixedly connected to a threaded sleeve (403). A threaded rod (404) is threadedly connected inside the threaded sleeve (403). One end of the threaded rod (404) away from the drive motor (402) is located outside the threaded sleeve (403) and is fixedly connected to the side wall of the baffle (401).

7. An automatic pipe cutting machine for tables and chairs according to claim 6, characterized in that: The two side plates (102) on the right side are provided with scale grooves on their tops, and the baffle (401) is provided with indicator grooves on its top and near the front and rear sides.

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