A positioning mechanism for a metal cutting machine tool

Abstract

This utility model belongs to the field of metal cutting technology, specifically disclosing a positioning mechanism for a metal cutting machine tool. The mechanism includes a machine tool, a conveyor table fixedly mounted on its outer surface, a cushion provided on the inner side of the conveyor table, and a fixed platform fixedly mounted on the top of the machine tool. A groove is formed on the fixed platform, and a sliding plate is slidably connected to the groove via a drive mechanism. A push rod is fixedly connected to the outer surface of the sliding plate. This positioning mechanism, through a drive mechanism and a buffer adaptation mechanism, allows the arc-shaped clamping plate to clamp the metal rod in a first-flexible-then-rigid manner. Through the buffering effect of the spring, the arc-shaped clamping plate gradually adapts to the shape, size deviation, and surface unevenness of the metal rod upon contact, resulting in better contact between the arc-shaped clamping plate and the surface of the metal rod. This finds a precise point where the metal rod is stably clamped and evenly stressed, reducing the risk of displacement of the metal rod during cutting.

Description

Technical Field

[0001] This application relates to the field of metal cutting technology, specifically a positioning mechanism for a metal cutting machine tool. Background Technology

[0002] Metal cutting machine tools are used to process various metal workpieces by cutting, grinding or special processing methods to obtain the required geometric shape, dimensional accuracy and surface quality. When cutting a metal bar by a machine tool, the metal bar must be positioned first to prevent it from shifting during the cutting process.

[0003] A search revealed that patent CN222308140U discloses a positioning mechanism for a metal cutting machine tool, including a machining platform. The upper surface of the machining platform has a sliding groove, and a sliding block slides inside the sliding groove. A placement plate is fixedly mounted on the upper surface of the sliding block, and a cavity is formed inside the placement plate. An electromagnet is installed inside the cavity. Vertical plates are fixedly mounted on both sides of the upper surface of the placement plate, and each vertical plate has a threaded hole. A threaded rod is installed inside each threaded hole. One end of each threaded rod passes through the vertical plate and is rotatably secured with a clamping block. The other end is fixedly mounted with a handwheel. The user can connect the electromagnet to an external device to energize it, thereby initially positioning the workpiece on the upper surface of the placement plate to prevent it from moving up and down. Then, rotating the handwheel moves the clamping block to clamp and fix both ends of the workpiece, preventing it from swaying left and right.

[0004] In the process of clamping the workpiece, the aforementioned positioning mechanism directly and rigidly clamps the workpiece with clamping blocks. In this direct and rigid clamping process, the clamping blocks come into instantaneous contact with the workpiece, such as the metal rod, and apply enormous pressure. There is no buffering stage to accommodate the shape, size deviation, and surface unevenness of the metal rod. In particular, the metal rod may have slight bending or protrusions and depressions on its surface. Direct and rigid clamping will prevent the clamping plates from fully adhering to the surface of the metal rod, making it difficult to determine a precise point that can stably clamp and evenly distribute the force. As a result, although the metal rod appears to be clamped stably, it is easy for it to deviate during the cutting process. Utility Model Content

[0005] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and to propose a positioning mechanism for metal cutting machine tools to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides a positioning mechanism for a metal cutting machine tool, including a machine tool. A conveyor table is fixedly installed on the outer surface of the machine tool, and a cushion is provided on the inner side of the conveyor table. A fixed platform is fixedly installed on the top of the machine tool, and a slot is formed on the fixed platform. A slide plate is slidably connected to the slot via a drive mechanism. A push rod is fixedly connected to the outer surface of the slide plate. A positioning rod is slidably sleeved at the end of the push rod away from the slide plate. An arc-shaped clamp is provided at the end of the positioning rod away from the push rod. A buffer adaptation mechanism is provided inside the push rod. A shifting cutting mechanism is provided on the machine tool.

[0007] Preferably, the driving mechanism includes a fixed shaft fixedly connected to a fixed platform, a cylinder rotatably connected to the outer surface of the fixed shaft, and a concave plate fixedly connected to the output end of the cylinder. The driving mechanism can adjust the position of the arc-shaped clamping plate to move it to a position that stably clamps the metal rod.

[0008] Preferably, a platform shaft is fixedly inserted through the inner side of the fixed platform, an inner swing arm is rotatably connected to the outer surface of the platform shaft, a top shaft is rotatably connected to the top end of the inner swing arm, and the outer surface of the top shaft is rotatably connected to the inner surface of the concave plate.

[0009] Preferably, a through shaft is fixedly inserted through the inner side of the skateboard, an outer swing arm is rotatably connected to the outer surface of the through shaft, a connecting rod is rotatably connected to the end of the outer swing arm away from the through shaft, and the outer surface of the connecting rod is rotatably connected to the inner surface of the inner swing arm.

[0010] Preferably, the buffer adaptation mechanism includes a slide plate fixedly connected to the end of the positioning rod away from the arc-shaped clamping plate. An inner shaft is fixedly connected to the side of the slide plate away from the positioning rod. The buffer adaptation mechanism allows the arc-shaped clamping plate to first flexibly resist and then rigidly clamp the metal rod during the process of contacting and clamping it.

[0011] Preferably, the push rod is internally fixedly connected to a fixing ring, and the inner side of the fixing ring is movably inserted through the outer surface of the inner shaft. The outer surface of the fixing ring is provided with a spring, and the end of the spring away from the fixing ring is fixedly connected to the outer surface of the slide plate.

[0012] Preferably, the shifting cutting mechanism includes an electric actuator fixedly mounted on the machine tool. The output end of the electric actuator is fixedly connected to a fixed frame, and the outer surface of the fixed frame is slidably connected to the inner side of the machine tool. The shifting cutting mechanism can cut the metal rod at an appropriate time.

[0013] Preferably, the inner surface of the fixing frame is rotatably connected to a frame shaft, and the outer surface of the frame shaft is fixedly fitted with a cutter.

[0014] Preferably, a motor is fixedly mounted on the mounting frame, and a drive wheel is fixedly connected to the output end of the motor.

[0015] Preferably, a conveyor belt is slidably connected to the outer surface of the drive wheel, and a transmission wheel is fixedly connected to the end of the frame shaft away from the cutter. The outer surface of the transmission wheel is slidably connected to the inner side of the conveyor belt away from the drive wheel.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The positioning mechanism of this metal cutting machine tool, through the drive mechanism and the buffer adaptation mechanism, allows the arc-shaped clamping plate to clamp the metal bar in a flexible-then-rigid manner. Through the buffering effect of the spring, the arc-shaped clamping plate can gradually adapt to the shape, size deviation and surface unevenness of the metal bar when it comes into contact with the metal bar, so that the arc-shaped clamping plate and the surface of the metal bar fit better. This finds a precise point that allows the metal bar to be stably clamped and uniformly stressed, reducing the risk of the metal bar shifting during the cutting process.

[0018] 2. The positioning mechanism of this metal cutting machine tool, through the shifting cutting mechanism, allows the cutting components such as the cutter to be in the right position at the right time, without obstructing the conveying of the metal bar. During the conveying of the metal bar, the cutter can be moved to the right position as needed for cutting, and can be moved away in time after the cutting is completed, ensuring the continuous conveying of the metal bar and improving production efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this application;

[0020] Figure 2 This is a schematic diagram of the surface structure of the fixed platform in this application;

[0021] Figure 3 This is a schematic diagram of the connection structure between the inner and outer swing arms in this application;

[0022] Figure 4 This is a schematic diagram of the internal structure of the push rod in this application;

[0023] Figure 5 This is a schematic diagram of the surface structure of the fixing frame in this application.

[0024] The components are: 1. Machine tool; 2. Conveyor table; 3. Cushion; 4. Fixed table; 5. Table groove; 6. Slide plate; 7. Fixed shaft; 8. Cylinder; 9. Concave plate; 10. Table shaft; 11. Inner swing arm; 12. Top shaft; 13. Through shaft; 14. Outer swing arm; 15. Connecting rod; 16. Push rod; 17. Positioning rod; 18. Arc-shaped clamp; 19. Slide plate; 20. Inner shaft; 21. Fixed ring; 22. Spring; 23. Electric push rod; 24. Fixed frame; 25. Frame shaft; 26. Cutting knife; 27. Motor; 28. Drive wheel; 29. ​​Conveyor belt; 30. Transmission wheel. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Please see Figure 1-5 A positioning mechanism for a metal cutting machine tool includes a machine tool 1. A conveyor table 2 is fixedly installed on the outer surface of the machine tool 1. A cushion 3 is provided on the inner side of the conveyor table 2. A fixed platform 4 is fixedly installed on the top of the machine tool 1. A platform groove 5 is opened on the fixed platform 4. A slide plate 6 is slidably connected in the platform groove 5 through a drive mechanism. A push rod 16 is fixedly connected to the outer surface of the slide plate 6. The push rod 16 flexibly passes through the conveyor table 2. The conveyor table 2 plays a relative limiting role for the push rod 16 (that is, to allow the push rod 16 to push forward smoothly in the horizontal direction). A positioning rod 17 is slidably sleeved at the end of the push rod 16 away from the slide plate 6. An arc-shaped clamping plate 18 is provided at the end of the positioning rod 17 away from the push rod 16. A buffer adaptation mechanism is provided inside the push rod 16. A shifting cutting mechanism is provided on the machine tool 1.

[0027] Through the above technical solution, during the cutting process of the metal rod, the metal rod is conveyed on the conveying table 2. When the metal rod is conveyed to the appropriate position, the arc-shaped clamping plate 18 can be accurately and stably clamped by the drive mechanism and the buffer adaptation mechanism (during which the metal rod is clamped against the backing pad 3). Finally, the cutting operation of the metal rod can be performed by the shifting cutting mechanism.

[0028] Specifically, the drive mechanism includes a fixed shaft 7 fixedly connected to the fixed platform 4, a cylinder 8 rotatably connected to the outer surface of the fixed shaft 7, and a concave plate 9 fixedly connected to the output end of the cylinder 8.

[0029] Through the above technical solution, the fixed shaft 7 is designed to cooperate with the cylinder 8, because during the process of the cylinder 8 pushing and pulling the concave plate 9, its own angle will deflect to a certain extent.

[0030] Specifically, a platform shaft 10 is fixedly inserted through the inner side of the fixed platform 4, an inner swing arm 11 is rotatably connected to the outer surface of the platform shaft 10, a top shaft 12 is rotatably connected to the top end of the inner swing arm 11, and the outer surface of the top shaft 12 is rotatably connected to the inner surface of the concave plate 9.

[0031] Through the above technical solution, after the concave plate 9 is pushed or pulled, it will drive the inner swing arm 11 to deflect synchronously, during which the inner swing arm 11 will swing along the table axis 10.

[0032] Specifically, a through shaft 13 is fixedly inserted into the inner side of the skateboard 6, and an outer swing arm 14 is rotatably connected to the outer surface of the through shaft 13. A connecting rod 15 is rotatably connected to the end of the outer swing arm 14 away from the through shaft 13, and the outer surface of the connecting rod 15 is rotatably connected to the inner surface of the inner swing arm 11.

[0033] Through the above technical solution, the inner swing arm 11 will deflect synchronously with the connecting rod 15 during the swing process. During this period, the connecting rod 15 will push and pull the outer swing arm 14 to deflect accordingly, and finally allow the outer swing arm 14 to apply force to the skateboard 6 through the through shaft 13.

[0034] Specifically, the buffer adaptation mechanism includes a slide plate 19 fixedly connected to the end of the positioning rod 17 away from the arc-shaped clamp 18, and an inner shaft 20 fixedly connected to the side of the slide plate 19 away from the positioning rod 17.

[0035] Through the above technical solution, when the positioning rod 17 is subjected to the action of the buffer adaptation mechanism, it will drive the arc-shaped clamping plate 18 to move synchronously. During this process, the clamping force of the arc-shaped clamping plate 18 on the metal rod gradually changes from flexible to rigid.

[0036] Specifically, a fixed ring 21 is fixedly connected inside the push rod 16, and the inner side of the fixed ring 21 is movably inserted through the outer surface of the inner shaft 20. A spring 22 is provided on the outer surface of the fixed ring 21, and the end of the spring 22 away from the fixed ring 21 is fixedly connected to the outer surface of the slide plate 19.

[0037] Through the above technical solution, the fixed ring 21 is in a fixed state inside the push rod 16, and it is always in a fixed position relative to the push rod 16, while the inner shaft 20 can flexibly pass through the fixed ring 21.

[0038] Specifically, the shifting cutting mechanism includes an electric push rod 23 fixedly mounted on the machine tool 1. The output end of the electric push rod 23 is fixedly connected to a fixed frame 24, and the outer surface of the fixed frame 24 is slidably connected to the inner side of the machine tool 1.

[0039] With the above technical solution, during the process of pushing and pulling the fixed frame 24, the fixed frame 24 can slide along the inner side of the machine tool 1, which means that the fixed frame 24, together with the cutter 26 and other components, will move closer to or away from the metal rod.

[0040] Specifically, the inner surface of the fixed frame 24 is rotatably connected to the frame shaft 25, and the outer surface of the frame shaft 25 is fixedly fitted with a cutter 26.

[0041] With the above technical solution, the two ends of the frame shaft 25 are respectively connected to the cutter 26 and the transmission wheel 30, which means that when the transmission wheel 30 is driven to rotate, the frame shaft 25 and the cutter 26 will rotate synchronously.

[0042] Specifically, a motor 27 is fixedly mounted on the mounting bracket 24, and a drive wheel 28 is fixedly connected to the output end of the motor 27.

[0043] Through the above technical solution, the motor 27 can drive the drive wheel 28 to rotate after it is turned on, and the conveyor belt 29 serves as a transmission component, which can convert the rotation of the drive wheel 28 into the rotation of the transmission wheel 30.

[0044] Specifically, a conveyor belt 29 is slidably connected to the outer surface of the drive wheel 28, and a transmission wheel 30 is fixedly connected to the end of the frame shaft 25 away from the cutter 26. The outer surface of the transmission wheel 30 is slidably connected to the inner side of the conveyor belt 29 away from the drive wheel 28.

[0045] Through the above technical solution, in the conventional system composed of drive wheel 28, conveyor belt 29 and transmission wheel 30, the conveyor belt 29 plays the role of transmitting and guiding force and motion, and the tightness of the connection between the conveyor belt 29, drive wheel 28 and transmission wheel 30 is appropriate and has been accurately calculated.

[0046] Working principle: During the cutting process of the metal rod, the metal rod is conveyed on the conveyor table 2. When the metal rod is conveyed to the appropriate position, the concave plate 9 is pushed by the cylinder 8. After the concave plate 9 is pushed, it will move the inner swing arm 11 along the table shaft 10. During this process, the connecting rod 15 will move synchronously and pull the outer swing arm 14, causing the outer swing arm 14 to rotate along the through shaft 13. At the same time, the through shaft 13 pulls the slide plate 6, causing the slide plate 6 to slide forward along the table groove 5. The push rod 16 on the slide plate 6 will then move forward synchronously. The positioning rod 17 at end 6 pushes the arc-shaped clamping plate 18 to gradually approach and compress the metal rod. During the process of the arc-shaped clamping plate 18 clamping the metal rod, the clamping force of the arc-shaped clamping plate 18 on the metal rod gradually changes from flexible resistance to rigid clamping. During this period, because the push rod 16 and the positioning rod 17 are gradually misaligned (that is, the positioning rod 17 will further penetrate into the push rod 16), the inner shaft 20 will gradually pass through the fixing ring 21, and the distance between the slide plate 19 and the fixing ring 21 will gradually decrease, thereby compressing the spring 22 until the inner shaft 20 abuts against the inner wall of the push rod 16. At this time, the push rod continues to be pushed forward. 16. The curved clamp 18 will then rigidly clamp onto the metal rod. Combined with the support of the cushion 3, the metal rod is stably held in place. In this first-flexible-then-rigid clamping method, the spring 22 acts as a buffer after the clamp contacts the metal rod. During the flexible phase, the curved clamp 18 can gradually adapt to the shape, size deviation, and surface unevenness of the metal rod. The compression of the spring 22, combined with the small-amplitude rotation of the metal rod itself, adjusts the contact state between the curved clamp 18 and the metal rod, making it easier to find a precise point where the metal rod is stably clamped and evenly stressed, thus ensuring accurate and stable clamping. After holding the metal rod and securing it stably, the position of the fixing frame 24 can be adjusted using the electric actuator 23. The electric actuator 23 is used to pull the fixing frame 24 horizontally to a suitable position. At the same time, the motor 27 is turned on to drive the drive wheel 28 to rotate. Under the transmission action of the conveyor belt 29, the drive wheel 30 rotates synchronously. The rotation of the drive wheel 30 is transmitted to the cutter 26 through the frame shaft 25, so that the cutter 26 performs cutting operation on the metal rod during high-speed rotation. This shifting cutting mechanism allows the cutting components such as the cutter 26 to be in the right position at the right time, without obstructing the transport of the metal rod.

[0047] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning mechanism for a metal cutting machine tool, comprising a machine tool (1), characterized in that: A conveyor table (2) is fixedly installed on the outer surface of the machine tool (1). A cushion (3) is provided on the inner side of the conveyor table (2). A fixed platform (4) is fixedly installed on the top of the machine tool (1). A platform groove (5) is opened on the fixed platform (4). A slide plate (6) is slidably connected in the platform groove (5) through a drive mechanism. A push rod (16) is fixedly connected to the outer surface of the slide plate (6). A positioning rod (17) is slidably sleeved at the end of the push rod (16) away from the slide plate (6). An arc-shaped clamp (18) is provided at the end of the positioning rod (17) away from the push rod (16). A buffer adaptation mechanism is provided inside the push rod (16). A shifting cutting mechanism is provided on the machine tool (1).

2. The positioning mechanism for a metal cutting machine tool according to claim 1, characterized in that: The driving mechanism includes a fixed shaft (7) fixedly connected to a fixed platform (4), a cylinder (8) rotatably connected to the outer surface of the fixed shaft (7), and a concave plate (9) fixedly connected to the output end of the cylinder (8).

3. The positioning mechanism for a metal cutting machine tool according to claim 2, characterized in that: A platform shaft (10) is fixedly inserted through the inner side of the fixed platform (4). An inner swing arm (11) is rotatably connected to the outer surface of the platform shaft (10). A top shaft (12) is rotatably connected to the top end of the inner swing arm (11). The outer surface of the top shaft (12) is rotatably connected to the inner surface of the concave plate (9).

4. A positioning mechanism for a metal cutting machine tool according to claim 3, characterized in that: The inner side of the slide (6) is fixedly provided with a through shaft (13), and the outer surface of the through shaft (13) is rotatably connected to an outer swing arm (14). The end of the outer swing arm (14) away from the through shaft (13) is rotatably connected to a connecting rod (15), and the outer surface of the connecting rod (15) is rotatably connected to the inner surface of the inner swing arm (11).

5. A positioning mechanism for a metal cutting machine tool according to claim 1, characterized in that: The buffer adaptation mechanism includes a slide (19) fixedly connected to the end of the positioning rod (17) away from the arc-shaped clamp (18), and an inner shaft (20) is fixedly connected to the side of the slide (19) away from the positioning rod (17).

6. A positioning mechanism for a metal cutting machine tool according to claim 5, characterized in that: The push rod (16) is internally fixedly connected to a fixing ring (21), and the inner side of the fixing ring (21) is movably connected to the outer surface of the inner shaft (20). The outer surface of the fixing ring (21) is provided with a spring (22), and the end of the spring (22) away from the fixing ring (21) is fixedly connected to the outer surface of the slide (19).

7. A positioning mechanism for a metal cutting machine tool according to claim 1, characterized in that: The shifting cutting mechanism includes an electric push rod (23) fixedly installed on the machine tool (1). The output end of the electric push rod (23) is fixedly connected to a fixing frame (24), and the outer surface of the fixing frame (24) is slidably connected to the inner side of the machine tool (1).

8. A positioning mechanism for a metal cutting machine tool according to claim 7, characterized in that: The inner surface of the fixed frame (24) is rotatably connected to the frame shaft (25), and the outer surface of the frame shaft (25) is fixedly fitted with a cutter (26).

9. A positioning mechanism for a metal cutting machine tool according to claim 8, characterized in that: A motor (27) is fixedly installed on the fixed frame (24), and a drive wheel (28) is fixedly connected to the output end of the motor (27).

10. A positioning mechanism for a metal cutting machine tool according to claim 9, characterized in that: The outer surface of the drive wheel (28) is slidably connected to a conveyor belt (29), and the end of the frame shaft (25) away from the cutter (26) is fixedly connected to a transmission wheel (30). The outer surface of the transmission wheel (30) is slidably connected to the inner side of the conveyor belt (29) away from the drive wheel (28).

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