Chair leg double-end corner cutting numerical control tenon milling machine

Abstract

The utility model relates to the technical field of numerical control tenon milling machines, and discloses a chair leg double-end corner cutting numerical control tenon milling machine which comprises a workbench, the left side and the right side of the top end of the workbench are fixedly connected with placing frames, the front ends of the placing frames are fixedly connected with motors, and the driving ends of the motors are fixedly connected with L-shaped plates. The top ends of the two L-shaped plates are fixedly connected with a positioning mechanism, and the rear ends of the two placing frames are fixedly connected with an automatic discharging mechanism. And the positioning mechanism comprises two square boxes, the bottom ends of the square boxes are fixedly connected to the top ends of the L-shaped plates, electric push rods are fixedly connected to the interiors of the square boxes, and the driving ends of the electric push rods are fixedly connected with U-shaped frames. According to the utility model, the positioning seat II is in contact with the chair leg to center and position the chair leg, so that the chair leg is accurately positioned, and meanwhile, the chair leg is prevented from being subjected to overlarge impact force due to the buffering of the spring, so that the processing quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of CNC milling and tenoning machine technology, and in particular to a CNC milling and tenoning machine for double-end corner cutting of chair legs. Background Technology

[0002] Chair legs are the supporting parts of a chair, usually located at the bottom, serving to support and stabilize the chair. Chair legs can come in various materials, shapes, and designs, commonly including nylon plastic legs, electroplated legs, polished aluminum alloy legs, and iron frame legs. Shapes can be categorized as five-star legs, arched legs, etc. The design and material choice of chair legs affect the chair's stability, load-bearing capacity, and lifespan. In some special scenarios, chair leg designs may also include adjustable and detachable functions to adapt to different usage needs and environments.

[0003] A chair leg milling and tenoning machine is a device used for processing chair legs, primarily for milling and tenoning the ends of chair legs. This equipment typically features high precision and efficiency, significantly improving the processing quality and production efficiency of chair legs. For example, an automatic mortise and tenon milling machine for chair legs can automate the mortise and tenon milling process, effectively reducing labor intensity and increasing processing efficiency.

[0004] In existing technologies, some tenoning machines, when performing chamfering and tenoning on chair legs, lack a cushioning and protective positioning mechanism, making the chair legs prone to damage and positional misalignment during processing. For example, some simple fixtures can only roughly fix the chair legs, failing to ensure that the ends of the chair legs are in precise processing positions. This results in the finished chair legs failing to meet the required dimensional and shape accuracy, affecting the overall assembly and quality of the chair. To address these issues, a CNC tenoning machine with double-end chamfering for chair legs is proposed. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a CNC tenoning machine for double-end beveling of chair legs, which aims to improve the problem that some existing tenoning machines lack a buffer protection positioning mechanism when performing beveling and tenoning on chair legs, resulting in easy damage and positional displacement of chair legs during processing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A CNC milling and tenoning machine for double-end beveling of chair legs includes a worktable. Placement racks are fixedly connected to the top left and right sides of the worktable. A motor is fixedly connected to the front end of the placement rack. An L-shaped plate is fixedly connected to the drive end of the motor. A positioning mechanism is fixedly connected to the top of the two L-shaped plates. An automatic unloading mechanism is fixedly connected to the rear end of the two placement racks.

[0008] The positioning mechanism includes two square boxes. The bottom of the square boxes is fixedly connected to the top of the L-shaped plate. An electric push rod is fixedly connected inside the square box. A U-shaped frame is fixedly connected to the drive end of the electric push rod. A fixing plate is fixedly connected to the front side of the U-shaped frame. Sliding rods are slidably connected to the upper and lower sides of the inside of the fixing plate. Springs are sleeved on the outside of the sliding rods. A positioning seat is fixedly connected to the adjacent side of the two sliding rods. A fixing plate is fixedly connected to the rear side of the U-shaped frame. A positioning seat is fixedly connected to the adjacent side of the two fixing plates.

[0009] As a further description of the above technical solution:

[0010] The automatic unloading mechanism includes a long strip block. The front end of the long strip block is fixedly connected to the rear end of the two placement racks. A cylinder is fixedly connected inside the long strip block. A connecting rod is fixedly connected to the driving end of the cylinder. Transmission plates are fixedly connected to both the left and right sides of the connecting rod. Support rods are fixedly connected to both the left and right sides of the long strip block. A rotating plate is rotatably connected to the outside of the support rod. An arc-shaped plate is fixedly connected to the top of the rotating plate.

[0011] As a further description of the above technical solution:

[0012] The top left and right sides of the workbench are fixedly connected to support frames, the inside of the support frames are slidably connected to a grinding machine, the inside of the placement frame is slidably connected to a telescopic rod, and the top of the telescopic rod is fixedly connected to a pressure plate.

[0013] As a further description of the above technical solution:

[0014] The U-shaped frame is externally slidably connected to the inside of the square box, and the far sides of the multiple springs are fixedly connected to the near sides of the two fixing plates, and the near sides of the multiple springs are fixedly connected to the near sides of the positioning seat.

[0015] As a further description of the above technical solution:

[0016] Two limiting plates are fixedly connected to the far side of the plurality of sliding rods, and the near side of the two limiting plates is in contact with the far side of the two fixed plates.

[0017] As a further description of the above technical solution:

[0018] The connecting rod is externally slidably connected to the inside of the long strip block, the two transmission plates are externally slidably connected to the inside of the long strip block, and the transmission plates are externally slidably connected to the inner wall of the rotating plate;

[0019] As a further description of the above technical solution:

[0020] A sleeve is rotatably connected to the outer, far side of each of the two transmission plates. A sliding groove is provided inside the rotating plate, and the outer side of the sleeve is slidably connected to the inner wall of the sliding groove.

[0021] As a further description of the above technical solution:

[0022] A push plate is fixedly connected to the front end of the arc-shaped plate, and the bottom end of the long strip is fixedly connected to the top of the workbench.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the motor serves as the power source, driving the square box to rotate to a horizontal position via the L-shaped plate. The electric push rod pushes the U-shaped frame to move, and the U-shaped frame drives the first fixed plate and the second fixed plate to move towards the center. The first positioning seat moves to both sides when the chair leg first contacts it, driving the sliding rod and squeezing the spring to achieve initial positioning and buffering. Then, the second positioning seat contacts the chair leg to center it, thereby accurately positioning the chair leg. At the same time, the spring buffering avoids the chair leg from being subjected to excessive impact force, thereby improving the processing quality.

[0025] 2. In this utility model, after the chair leg is processed, the cylinder inside the long block generates power, pushing the connecting rod upward. The connecting rod drives the transmission plate upward, which slides through the sleeve in the groove of the rotating plate, converting the movement of the transmission plate into the rotation of the rotating plate around the support rod. The rotation of the rotating plate drives the arc plate to rotate, and the push plate on the arc plate moves forward, pushing the processed chair leg off the placement frame. The chair leg falls into the collection box through the opening in the workbench, thus realizing automatic unloading of the chair leg, saving time and improving the efficiency of the entire processing process. Attached Figure Description

[0026] Figure 1 A perspective view of the CNC tenoning machine for double-end beveling of chair legs proposed in this utility model;

[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 This is a schematic diagram of the square box structure of the CNC milling tenon machine for double-end chamfering of chair legs proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the long strip block of the CNC milling tenon machine for double-end chamfering of chair legs proposed in this utility model;

[0030] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0031] Legend:

[0032] 1. Workbench; 2. Support frame; 3. Grinding machine; 4. Placement rack; 5. Motor; 6. L-shaped plate; 7. Square box; 8. Electric push rod; 9. U-shaped frame; 10. Fixed plate one; 11. Sliding rod; 12. Spring; 13. Limiting plate; 14. Positioning seat one; 15. Fixed plate two; 16. Positioning seat two; 17. Long strip block; 18. Cylinder; 19. Connecting rod; 20. Transmission plate; 21. Sleeve; 22. Support rod; 23. Rotating plate; 24. Slide groove; 25. Arc plate; 26. Telescopic rod; 27. Pressure plate. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a CNC tenoning machine for double-end beveling of chair legs, comprising a worktable 1. Support frames 2 are fixedly connected to the top left and right sides of the worktable 1. A grinding machine 3 is slidably connected inside the support frames 2. Placement frames 4 are fixedly connected to the top left and right sides of the worktable 1. The grinding machine 3 is a key component for achieving the beveling and tenoning of chair legs. By sliding to a suitable position within the support frames 2, it can precisely cut and tenon the chair legs on the placement frames 4. According to a pre-set program, the ends of the chair legs are processed to achieve the required shape and size. The worktable 1 is the basic structure of the entire CNC tenoning machine for double-end beveling of chair legs, providing a platform for the installation and support of the support frames 2 and placement frames 4, ensuring that each component is in a stable relative position during operation and guaranteeing smooth processing. The placement frame 4 has a telescopic rod 26 slidably connected inside, and a pressure plate 27 is fixedly connected to the top of the telescopic rod 26. The height of the telescopic rod 26 can be adjusted. The pressure plate 27, supported by the telescopic rod 26, can press down on the chair legs to further fix them and prevent displacement during processing. A motor 5 is fixedly connected to the front end of the placement frame 4, and an L-shaped plate 6 is fixedly connected to the drive end of the motor 5. A positioning mechanism is fixedly connected to the top of the two L-shaped plates 6, and an automatic unloading mechanism is fixedly connected to the rear ends of the two placement frames 4. The motor 5 is the power source for starting the entire positioning system. When the motor 5 is turned on, it generates power and transmits the power through the L-shaped plates 6 at the drive end, driving the subsequent positioning mechanism to move to the position where the chair legs are positioned.

[0035] The positioning mechanism includes two square boxes 7. The bottom of the square boxes 7 is fixedly connected to the top of the L-shaped plate 6. The L-shaped plate 6 connects the motor 5 and the square boxes 7 in the positioning mechanism, and effectively transmits the power generated by the motor 5 to the square boxes 7, ensuring that the square boxes 7 can rotate to a horizontal position according to the predetermined requirements, thus acting as a bridge for power transmission. An electric push rod 8 is fixedly connected inside the square boxes 7. The square boxes 7 are an important component of the positioning mechanism. On the one hand, they receive the power transmitted by the L-shaped plate 6 and perform corresponding rotational movements; on the other hand, they provide fixed support for the electric push rod 8 inside. A U-shaped frame 9 is fixedly connected to the drive end of the electric push rod 8. The outside of the U-shaped frame 9 is slidably connected to the inside of the square boxes 7. A fixing plate 10 is fixedly connected to the front side of the U-shaped frame 9, and a fixing plate 2 15 is fixedly connected to the rear side of the U-shaped frame 9. The U-shaped frame 9 moves towards the center under the push of the electric push rod 8. Its movement drives the movement of the fixing plates 10 and 2 15 fixed on its front and rear sides, serving as an intermediate medium for transmitting the power of the electric push rod 8 to the fixing plates 10 and 2 15.

[0036] Sliding rods 11 are slidably connected to the upper and lower sides of the inner surface of the fixed plate 10. Positioning seats 14 are fixedly connected to the adjacent sides of the two sliding rods 11. The positioning seats 14 first contact the chair legs during the chair leg positioning process. Springs 12 are sleeved on the outside of the sliding rods 11. The distant sides of multiple springs 12 are fixedly connected to the adjacent sides of the two fixed plates 10, and the adjacent sides of multiple springs 12 are fixedly connected to the adjacent sides of the positioning seats 14. When the U-shaped frame 9 moves towards the center, the fixed plate 10 drives the positioning seats 14 to move towards the center, and through the cooperation of the sliding rods 11, springs 12, and positioning seats 14, it achieves initial positioning and cushioning of the chair legs. Multiple sliding rods 11 are fixedly connected to two limiting plates 13 on opposite sides. The adjacent sides of the two limiting plates 13 are in contact with the opposite sides of two fixed plates 10. The sliding rods 11 slide inside the fixed plates 10, with one end connected to the positioning seat 14 and the other end connected to the limiting plate 13. When the positioning seat 14 is squeezed to the sides by the chair leg, the sliding rods 11 move to the sides and squeeze the springs 12, which guides and transmits force, ensuring the stable movement of the positioning seat 14. When the chair leg squeezes the positioning seat 14, the spring 12 is squeezed and deformed, which acts as a buffer to prevent the chair leg from being damaged by excessive impact. Two positioning seats 16 are fixedly connected to the adjacent sides of the two fixed plates 15. When the fixed plates 15 move towards the center, the positioning seats 16 contact the chair leg and center it, working together with the positioning seats 14 to complete the centering and positioning of the chair leg, improving the accuracy of the chair leg processing.

[0037] Reference Figure 1 , Figure 4 and Figure 5The automatic unloading mechanism includes a long strip 17. The front end of the long strip 17 is fixedly connected to the rear end of two placement racks 4, and the bottom end of the long strip 17 is fixedly connected to the top of the workbench 1. A cylinder 18 is fixedly connected inside the long strip 17. A connecting rod 19 is fixedly connected to the drive end of the cylinder 18. The connecting rod 19 is slidably connected to the inside of the long strip 17. Transmission plates 20 are fixedly connected to both sides of the connecting rod 19. The two transmission plates 20 are slidably connected to the inside of the long strip 17. Support rods 22 are fixedly connected to both sides of the long strip 17. A rotating plate 23 is rotatably connected to the outside of the support rods 22. The transmission plates 20 are slidably connected to the inner wall of the rotating plate 23. Sleeves 21 are rotatably connected to the opposite side of the two transmission plates 20. A groove 24 is opened inside the rotating plate 23. The sleeves 21 are slidably connected to the inner wall of the groove 24. An arc-shaped plate 25 is fixedly connected to the top of the rotating plate 23, and a push plate is fixedly connected to the front end of the arc-shaped plate 25.

[0038] Working principle: First, the worker places the chair leg to be processed on the placement rack 4. Then, by turning on the motor 5, the power is generated to drive the square box 7 to rotate to a horizontal position in conjunction with the connection of the L-shaped plate 6. The electric push rod 8 of the square box 7 generates power to drive the U-shaped frame 9 to move towards the center. The movement of the U-shaped frame 9 drives the fixed plate 10 and fixed plate 2 15 to move towards the center. The chair leg will first come into contact with and be pressed against the positioning seat 14. The positioning seat 14 moves to both sides, which drives the sliding rod 11 to move to both sides and presses against the spring 12. The positioning seat 14, sliding rod 11 and spring 12 work together to perform initial positioning and buffering of the chair leg. Then, the positioning seat 2 16, which moves towards the center, will come into contact with the chair leg and center it, thus achieving the centering and positioning of the chair leg. At the same time, there is a certain amount of buffering to prevent damage to the chair leg and improve the processing quality.

[0039] After the chair legs are processed, the cylinder 18 inside the long block 17 is activated to generate power to move the connecting rod 19 upward. This upward movement of the connecting rod 19 causes the transmission plate 20 to move upward. The sleeve 21 slides in the groove 24 inside the rotating plate 23, which in turn causes the transmission plate 20 to move upward and rotate the rotating plate 23 around the support rod 22. The rotation of the rotating plate 23 causes the arc plate 25 to rotate, which causes the push plate on the arc plate 25 to move forward and push the processed chair legs off the placement frame 4. The pushed-off chair legs fall into the collection box at the bottom of the workbench 1 through the opening inside the workbench 1, thus realizing automatic unloading of the chair legs and improving work efficiency.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A CNC milling machine for double-end beveling of chair legs, comprising a worktable (1), characterized in that: The top left and right sides of the workbench (1) are fixedly connected to a placement rack (4), the front end of the placement rack (4) is fixedly connected to a motor (5), the drive end of the motor (5) is fixedly connected to an L-shaped plate (6), the top ends of the two L-shaped plates (6) are fixedly connected to a positioning mechanism, and the rear ends of the two placement racks (4) are fixedly connected to an automatic feeding mechanism. The positioning mechanism includes two square boxes (7). The bottom of the square box (7) is fixedly connected to the top of the L-shaped plate (6). An electric push rod (8) is fixedly connected inside the square box (7). A U-shaped frame (9) is fixedly connected to the drive end of the electric push rod (8). A fixing plate (10) is fixedly connected to the front side of the U-shaped frame (9). Sliding rods (11) are slidably connected to the upper and lower sides inside the fixing plate (10). A spring (12) is sleeved on the outside of the sliding rod (11). A positioning seat (14) is fixedly connected to the adjacent side of the two sliding rods (11). A fixing plate (15) is fixedly connected to the rear side of the U-shaped frame (9). A positioning seat (16) is fixedly connected to the adjacent side of the two fixing plates (15).

2. The CNC milling machine for double-end beveling of chair legs according to claim 1, characterized in that: The automatic feeding mechanism includes a long strip (17), the front end of which is fixedly connected to the rear end of the two placement racks (4). A cylinder (18) is fixedly connected inside the long strip (17). A connecting rod (19) is fixedly connected to the driving end of the cylinder (18). A transmission plate (20) is fixedly connected to both the left and right sides of the connecting rod (19). A support rod (22) is fixedly connected to both the left and right sides of the long strip (17). A rotating plate (23) is rotatably connected to the outside of the support rod (22). An arc plate (25) is fixedly connected to the top of the rotating plate (23).

3. The CNC milling machine for double-end beveling of chair legs according to claim 1, characterized in that: The top left and right sides of the workbench (1) are fixedly connected to support frames (2), and a grinding machine (3) is slidably connected inside the support frame (2). The inside of the placement frame (4) is slidably connected to a telescopic rod (26), and a pressure plate (27) is fixedly connected to the top of the telescopic rod (26).

4. The CNC milling machine for double-end beveling of chair legs according to claim 1, characterized in that: The U-shaped frame (9) is externally slidably connected to the inside of the square box (7), and the far sides of the plurality of springs (12) are fixedly connected to the near sides of the two fixing plates (10), and the near sides of the plurality of springs (12) are fixedly connected to the near sides of the positioning seat (14).

5. The CNC milling machine for double-end beveling of chair legs according to claim 1, characterized in that: Two limiting plates (13) are fixedly connected to the far side of the plurality of sliding rods (11), and the near side of the two limiting plates (13) is in contact with the far side of the two fixing plates (10).

6. The CNC milling machine for double-end beveling of chair legs according to claim 2, characterized in that: The connecting rod (19) is externally slidably connected to the inside of the long strip (17), the two transmission plates (20) are externally slidably connected to the inside of the long strip (17), and the transmission plates (20) are externally slidably connected to the inner wall of the rotating plate (23).

7. The CNC milling machine for double-end beveling of chair legs according to claim 2, characterized in that: Both of the two transmission plates (20) are rotatably connected to sleeves (21) on opposite sides of the outside. The inside of the rotating plate (23) is provided with a sliding groove (24), and the outside of the sleeve (21) is slidably connected to the inner wall of the sliding groove (24).

8. The CNC milling machine for double-end beveling of chair legs according to claim 2, characterized in that: The front end of the arc plate (25) is fixedly connected to a push plate, and the bottom end of the long strip (17) is fixedly connected to the top of the workbench (1).

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