Portable tool magazine tool changing arm capable of quickly changing milling cutter machining center

Abstract

The portable tool magazine tool changing arm capable of rapidly changing the milling cutter machining center comprises a shell, the shell is connected with a cover plate through a first screw, one side of the shell is open, two sets of claw tools are rotationally connected to the position of the shell, and the adjacent sides of the two sets of claw tools are arranged in an inclined plane mode. A clamping mechanism for driving the two sets of claw cutters to clamp is installed in the shell, the containing groove and the side walls of the claw cutters are in smooth transition, the cleaning plate is slidably connected into the containing groove, and an elastic mechanism for driving the cleaning plate to be tightly attached to the side walls of the claw cutters is installed on the outer wall of the sliding block. The cleaning plate can uniformly and thoroughly clean the surface of the claw cutter under the driving of the sliding block, so that the influence of pollutants on the clamping surface is avoided, the cleanness of the surface of the claw cutter is ensured, the uniform distribution and stability of the clamping force in the subsequent clamping process are ensured, and the working efficiency is improved. And tool loosening or precision errors caused by unstable clamping are reduced, and the reliability of the whole tool changing process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tool changing arms, in particular to a convenient tool magazine tool changing arm capable of quickly replacing a milling cutter in a machining center. Background Art

[0002] The automatic tool changing system, referred to as ATC, is an important component of the machining center. It realizes the tool changing requirements of continuous processing between parts processes, that is, after each process is completed, the new tool used in the next process is automatically replaced on the spindle. It is generally completed through the coordinated actions of the manipulator, tool magazine and machine tool spindle.

[0003] In the prior art, a manipulator consists of a manipulator arm and two relatively arranged claws. In a non-working state, the two claws are in a closed state. When performing a tool changing operation, the tool changing process is realized with the help of the clamping of the claws. In actual applications, after the milling cutter has processed and cut the workpiece, its outer wall will adhere to it. Chips and other impurities are often attached to its outer wall. After being clamped by the claws, these chips and impurities will adhere to the clamping surface of the claws. During subsequent clamping, the clamping surface of the claws will be contaminated, which can easily lead to uneven clamping force, thereby affecting the stability and accuracy of clamping. Therefore, in view of the above problems, a convenient tool magazine tool changing arm for a milling cutter machining center that can quickly replace the milling cutter is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a convenient tool magazine tool changing arm for a milling cutter machining center that can quickly replace the cutter.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A convenient tool magazine tool changing arm for a milling cutter machining center that can quickly replace the milling cutter comprises a shell, the shell is connected to a cover plate by a screw, one side of the shell is open, and two groups of claw knives are rotatably connected thereto, the adjacent sides of the two groups of claw knives are inclined, a clamping mechanism for driving the two groups of claw knives to clamp is installed in the shell, a sliding groove is provided through the outer wall of the claw knife, a sliding block is slidably connected in the sliding groove, a cleaning plate is installed on the outer wall of the sliding block, the cleaning plate slides in contact with the side wall of the claw knife, the side walls of the two groups of claw knives are provided with a placement groove, the placement groove and the side wall of the claw knife are smoothly transitioned, and the cleaning plate is slidably connected in the placement groove, and the outer wall of the sliding block is installed with an elastic mechanism that drives the cleaning plate to fit tightly with the side wall of the claw knife.

[0007] Preferably, the elastic mechanism includes a side plate fixedly connected to the end face of the sliding block, the outer wall of the side plate is slidably connected with a connecting rod, the end of the connecting rod is fixedly connected to the cleaning plate, the other end of the connecting rod is fixedly connected to the limiting block, and the radius size is larger than the radius size of the connecting rod.

[0008] Preferably, a spring is sleeved on the outer wall of the connecting rod, one end of the spring is fixedly connected to the side wall of the side plate, and the other end of the spring is fixedly connected to the side wall of the limit block.

[0009] Preferably, the clamping mechanism includes a double-headed threaded rod rotatably connected to the shell, and the two groups of claw knives are rotated inside the shell through connecting plates respectively, and two groups of sliders are threadedly connected to the threaded sections of the double-headed threaded rod. The outer walls of the two groups of claw knives are fixedly connected to two groups of connecting blocks, and the sliders are connected to the adjacent connecting blocks through connecting plates, and the two ends of the connecting blocks are rotatably connected to the sliders and the connecting blocks respectively.

[0010] Preferably, the inner wall of the shell is fixedly connected to a limit rod, the two groups of sliders are slidably connected to the outer wall of the limit rod, the double-headed threaded rod and the outer wall of the limit rod are fixedly connected to a limit ring for separating the two groups of sliders, and the two groups of limit rings are of the same length.

[0011] Preferably, the claw knife is installed with a top plate by screw 2, the inner wall of the slide groove is rotatably connected to a threaded rod, the sliding block is threadedly connected to the threaded section of the threaded rod, the inner wall of the slide groove is fixedly connected to a sliding rod, and the sliding block is slidably connected to the outer wall of the sliding rod.

[0012] Preferably, the shell side wall is fixedly connected to servo motor 2, the outer walls of the two groups of claw knives are fixedly connected to servo motor 1, the end of the output shaft of servo motor 2 is coaxially fixedly connected to the double-headed threaded rod, and the two groups of claw knives are respectively coaxially fixedly connected to the threaded rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The cleaning plate provided in the present invention can clean the surface of the claw knife evenly and thoroughly under the drive of the sliding block, thereby avoiding the influence of pollutants on the clamping surface, ensuring the cleanliness of the claw surface, and then ensuring the uniform distribution and stability of the clamping force in the subsequent clamping process, reducing the looseness of the tool or the precision error caused by unstable clamping, and improving the reliability of the entire tool changing process.

[0015] 2. The present invention controls the contact force between the cleaning plate and the surface of the claw knife by setting an elastic mechanism through the compression and rebound action of the spring. When the cleaning plate is in close contact with the surface of the claw knife, appropriate contact force can ensure that the cleaning plate effectively removes chips, oil stains and other impurities attached to the claws, avoids long-term accumulation of impurities on the surface of the claw knife, and prevents wear and corrosion of the claw surface caused by pollutants.

[0016] 3. The present invention provides a double-headed threaded rod, a slider and other devices. Through the rotation of the double-headed threaded rod at both ends, the clamping position of the claw knife during the tool changing process can be accurately adjusted. At the same time, the claw knife can be finely adjusted between the two groups during rotation, ensuring that the position of the claw knife can accurately dock with the milling cutter each time it is clamped, thereby avoiding a decrease in tool changing accuracy due to position deviation.

[0017] In summary, the device avoids the influence of pollutants on the clamping surface by cleaning the surface of the claw knife, ensures the cleanliness of the claw surface, and thus ensures the uniform distribution and stability of the clamping force in the subsequent clamping process. Secondly, by setting an elastic mechanism, the compression and rebound effect of the spring are utilized to control the contact force between the cleaning plate and the surface of the claw knife, ensuring that the cleaning plate and the surface of the claw knife fit tightly. Finally, by setting double-headed threaded rods, sliders and other devices, the rotation of the double-headed threaded rods at both ends is utilized to accurately adjust the clamping position of the claw knife, thereby further improving the efficiency and accuracy of tool changing. Overall, the present invention optimizes each link in the tool changing process, improves the stability, accuracy and efficiency of the operation, and at the same time extends the service life of the tool and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a portable tool magazine tool changing arm for a milling cutter machining center capable of quickly changing a milling cutter according to the first embodiment of the present invention;

[0019] Figure 2 for Figure 1 Structural diagram;

[0020] Figure 3 for Figure 2 Structural diagram;

[0021] Figure 4 for Figure 3 Schematic diagram of the cross-section structure;

[0022] Figure 5 for Figure 3 Schematic diagram of the structure of the middle claw knife, slider, connecting block and other components.

[0023] Figure 6 for Figure 5 Structural diagram.

[0024] Figure 7 for Figure 5 Schematic diagram of the structure of the middle sliding block, cleaning plate, spring and other components.

[0025] In the figure: 1. Shell; 2. Cover plate; 3. Screw 1; 4. Claw knife; 5. Servo motor 1; 6. Servo motor 2; 7. Limit rod; 8. Double-head threaded rod; 9. Limit ring; 10. Slider; 11. Connecting plate; 12. Connecting block; 13. Connecting plate; 14. Slide groove; 15. Top plate; 16. Screw 2; 17. Placement groove; 18. Threaded rod; 19. Sliding rod; 20. Sliding block; 21. Cleaning plate; 22. Connecting rod; 23. Side plate; 24. Limit block; 25. Spring. DETAILED DESCRIPTION

[0026] Embodiment 1:

[0027] Reference Figure 1-7 , a convenient tool magazine tool changing arm for a milling cutter machining center that can quickly replace the milling cutter includes a shell 1, the shell 1 is connected to a cover plate 2 by a screw 3, one side of the shell 1 is open, and two groups of claw knives 4 are rotatably connected here, and the adjacent sides of the two groups of claw knives 4 are inclined, and a clamping mechanism for driving the two groups of claw knives 4 to clamp is installed in the shell 1, and a slide groove 14 is opened through the outer wall of the claw knife 4, and a sliding block 20 is slidably connected in the slide groove 14, and a cleaning plate 21 is installed on the outer wall of the sliding block 20, and the cleaning plate 21 fits and slides on the side wall of the claw knife 4, and the side walls of the two groups of claw knives 4 are opened with a placement groove 17, and the placement groove 17 and the side wall of the claw knife 4 are smoothly transitioned, and the cleaning plate 21 is slidably connected in the placement groove 17, and the outer wall of the sliding block 20 is installed with an elastic mechanism that drives the cleaning plate 21 to fit closely with the side wall of the claw knife 4;

[0028] The cleaning plate 21 fits with the clamping surface of the claw knife 4 and is driven to slide by the sliding block 20, which can effectively remove chips, oil stains or other impurities attached to the surface of the claw knife 4, ensure that the clamping surface of the claw 4 remains clean, and avoid uneven clamping force due to contaminants. The placement groove 17 is used to place the cleaning plate 21. The concave design of the placement groove 17 can prevent the cleaning plate 21 placed therein from coming into direct contact with the milling cutter during the clamping process.

[0029] Embodiment 2:

[0030] refer to Figure 5-7 The elastic mechanism includes a side plate 23 fixedly connected to the end face of the sliding block 20, the outer wall of the side plate 23 is slidably connected with a connecting rod 22, the end of the connecting rod 22 is fixedly connected to the cleaning plate 21, the other end of the connecting rod 22 is fixedly connected to the limiting block 24, and the radius size is larger than the radius size of the connecting rod 22, and the outer wall of the connecting rod 22 is sleeved with a spring 25, one end of the spring 25 is fixedly connected to the side wall of the side plate 23, and the other end of the spring 25 is fixedly connected to the side wall of the limiting block 24;

[0031] The combination of the spring 25 and the connecting rod 22 constitutes an elastic mechanism, which can ensure that the cleaning plate 21 always maintains a close fit with the side wall of the claw knife 4 during operation. The spring 25 provides sufficient elastic pressure to force the cleaning plate 21 to maintain a close fit, thereby effectively cleaning the chips, oil stains and impurities on the surface of the claw knife 4. Since the clamping surface of the claw knife 4 is arc-shaped and there is a certain curvature change, the connecting rod 22 and the spring 25 can provide a certain flexibility and adaptability. Through the elasticity of the spring 25, the cleaning plate 21 can adaptively adjust the contact pressure according to the changes on the surface of the claw knife 4 during the contact process, ensuring that the cleaning plate 21 and the surface of the claw knife 4 always maintain a uniform contact force.

[0032] Embodiment three:

[0033] refer to Figure 2-4 The clamping mechanism includes a double-headed threaded rod 8 rotatably connected to the shell 1, and two groups of claw knives 4 are respectively rotated inside the shell 1 through a connecting plate 11. Two groups of sliders 10 are threadedly connected to the threaded sections of the double-headed threaded rod 8. The outer walls of the two groups of claw knives 4 are fixedly connected to two groups of connecting blocks 12. The sliders 10 are connected to the adjacent connecting blocks 12 through a connecting plate 13, and the two ends of the connecting blocks 12 are respectively rotatably connected to the sliders 10 and the connecting blocks 12. The inner wall of the shell 1 is fixedly connected to the limit rod 7, and the two groups of sliders 10 are slidably connected to the outer wall of the limit rod 7. The double-headed threaded rod 8 and the outer wall of the limit rod 7 are fixedly connected with A limiting ring 9 is used to separate the two groups of sliders 10, and the two groups of limiting rings 9 have the same length. The claw knife 4 is installed with a top plate 15 through a screw 2 16. The inner wall of the slide groove 14 is rotatably connected to a threaded rod 18. The sliding block 20 is threadedly connected to the threaded section of the threaded rod 18. The inner wall of the slide groove 14 is fixedly connected to a sliding rod 19. The sliding block 20 is slidably connected to the outer wall of the sliding rod 19. The side wall of the housing 1 is fixedly connected to a servo motor 2 6. The outer walls of the two groups of claw knives 4 are fixedly connected to a servo motor 1 5. The end of the output shaft of the servo motor 2 6 is coaxially fixedly connected to the double-headed threaded rod 8. The two groups of claw knives 4 are coaxially fixedly connected to the threaded rod 18 respectively;

[0034] The double-headed threaded rod 8 is the core driving component of the clamping mechanism. The threaded sections at both ends of the double-headed threaded rod can simultaneously drive the two groups of sliders 10 to move along the threaded rod. Through the rotation of the double-headed thread, the slider 10 is driven to move relative to the threaded section of the threaded rod, thereby pushing the two groups of claw knives 4 to open and close. The limit rod 7 is fixed to the inner wall of the housing 1 to limit the range of motion of the slider 10 to prevent the slider 10 from excessive movement or offset. The limit rod 7 can ensure the clamping accuracy and stability of the claw knife 4. The limit ring 9 separates the two groups of sliders 10 to ensure the coordinated movement and stable operation of the two groups of sliders 10. The limit ring 9 also controls the relative movement of the two groups of claw knives 4 to make the clamping action accurate.

[0035] The functional principle of the present invention can be explained through the following operation mode: when the device is used in practice, the shell 1 is connected to the mechanical arm, and the mechanical arm is responsible for the movement and positioning of the whole device. When the tool changing operation is performed, the mechanical arm drives the two groups of claw cutters 4 to approach the milling cutter, and then drives the double-headed threaded rod 8 to rotate with the help of the servo motor 26. The rotation of the double-headed threaded rod 8 drives the two groups of slide blocks 10 to slide toward or relative to each other, and synchronously drives the claw cutters 4 to rotate around the hinge point with the connecting plate 11, so as to realize the relative closing or opening of the two groups of claw cutters 4. Through the rotation of the double-headed threaded rod 8, the claw cutter 4 realizes the action of clamping or releasing the milling cutter. During the clamping process, the limit rod 7 and the limit ring 9 provide mechanical restrictions to prevent the slider 10 from moving excessively, thereby ensuring that the two groups of claw cutters 4 maintain a stable and reliable clamping state, and at the same time limit the maximum motion range of the slider 10 to ensure the accuracy and safety of clamping, and avoid excessive opening and closing or unstable clamping of the claw cutter 4.

[0036] At the same time, the chips and other impurities attached to the surface of the claw knife 4 can be cleaned by cleaning the clamping surface of the claw knife 4 regularly. Specifically, the threaded rod 18 is driven to rotate by two sets of servo motors 26, and the sliding block 20 on the threaded section slides horizontally in the slide groove 14, and the cleaning plate 21 is set to slide synchronously. When sliding, the impurities on the outer wall of the claw knife 4 can be cleaned. The spring 25 and the connecting rod 22 can ensure that the cleaning plate 21 always maintains appropriate contact force with the outer wall of the claw knife 4, and at the same time ensure that the cleaning plate 21 is in close contact with the clamping surface of the claw knife 4, so that the chips and other impurities on the clamping surface of the claw knife 4 can be fully removed. At the same time, the elastic pressure provided by the spring 25 can be adjusted according to the curvature of the surface of the claw knife 4 or the cleaning requirements. In this way, the cleaning plate 21 can be adaptively adjusted according to the shape of the outer wall of the claw knife 4 to avoid damage to the surface of the claw knife or incomplete cleaning due to excessive or insufficient pressure.

[0037] After cleaning is completed, the threaded rod 18 drives the slider 10 to gradually return to the initial position, that is, the placement groove 17, to avoid unnecessary interference and wear during subsequent clamping.

[0038] Through the above working principle, the design of the cleaning plate 21 and the elastic mechanism cooperates to ensure the cleaning of the surface of the claw knife 4 before each clamping. The cleaning plate 21 can evenly remove the chips and other impurities attached to the surface of the claw knife 4 under the drive of the sliding block 20, avoiding the problem of uneven clamping force caused by contaminants. The elastic mechanism controls the contact pressure between the cleaning plate 21 and the surface of the claw knife 4, ensuring that the cleaning plate 21 does not cause excessive friction to the knife claw 4 during the cleaning process, and can effectively remove dirt, further extending the service life of the claw knife 4.

[0039] In addition, the cooperation between the double-threaded rod 8 and the limiting mechanism enables the two sets of claw knives 4 to operate synchronously and accurately, realizing accurate and rapid tool clamping and replacement, while the limiting mechanism limits the maximum range of motion of the slider 10 to prevent excessive opening and closing, ensuring that the claw knives 4 remain stable during the clamping and release process. The limiting rod 7 and the limiting ring 9 effectively avoid the unstable clamping of the claw knives 4 due to excessive opening and closing through mechanical limiting action, further improving the accuracy and safety of the entire tool changing process.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A portable tool magazine tool changing arm for a milling cutter processing center capable of quickly changing a milling cutter, comprising a housing (1), characterized in that: The shell (1) is connected to a cover plate (2) by means of a screw (3). One side of the shell (1) is open and two groups of claw knives (4) are rotatably connected thereto. The adjacent sides of the two groups of claw knives (4) are both inclined. A clamping mechanism for driving the two groups of claw knives (4) to clamp is installed in the shell (1). A sliding groove (14) is provided through the outer wall of the claw knives (4). A sliding block (20) is slidably connected in the sliding groove (14). A cleaning plate (21) is installed on the outer wall of the sliding block (20). The cleaning plate (21) is fitted and slidably connected to the side wall of the claw knives (4). The side walls of the two groups of claw knives (4) are provided with a placement groove (17). The placement groove (17) and the side wall of the claw knives (4) are smoothly transitioned, and the cleaning plate (21) is slidably connected in the placement groove (17). The outer wall of the sliding block (20) is installed with an elastic mechanism for driving the cleaning plate (21) to fit tightly with the side wall of the claw knives (4).

2. The portable tool magazine tool changing arm for a milling cutter machining center capable of quickly changing a milling cutter according to claim 1, characterized in that: The elastic mechanism comprises a side plate (23) fixedly connected to the end face of the sliding block (20); the outer wall of the side plate (23) is slidably connected to a connecting rod (22); the end of the connecting rod (22) is fixedly connected to the cleaning plate (21); the other end of the connecting rod (22) is fixedly connected to a limiting block (24), and the radius dimension of the limiting block (24) is greater than the radius dimension of the connecting rod (22).

3. The portable tool magazine tool changing arm for a milling cutter machining center capable of quickly changing a milling cutter according to claim 2, characterized in that: A spring (25) is sleeved on the outer wall of the connecting rod (22), one end of the spring (25) is fixedly connected to the side wall of the side plate (23), and the other end of the spring (25) is fixedly connected to the side wall of the limit block (24).

4. The portable tool magazine tool changing arm for a milling cutter machining center capable of quickly changing a milling cutter according to claim 3, characterized in that: The clamping mechanism comprises a double-headed threaded rod (8) rotatably connected in the shell (1); the two groups of claw knives (4) are respectively rotatable in the shell (1) via a connecting plate (11); two groups of sliders (10) are threadedly connected on the threaded section of the double-headed threaded rod (8); the outer walls of the two groups of claw knives (4) are fixedly connected with two groups of connecting blocks (12); the sliders (10) are connected to the adjacent connecting blocks (12) via a connecting plate (13), and the two ends of the connecting block (12) are respectively rotatably connected to the sliders (10) and the connecting blocks (12).

5. The portable tool magazine tool changing arm for a milling cutter machining center capable of quickly changing a milling cutter according to claim 4, characterized in that: The inner wall of the housing (1) is fixedly connected to a limit rod (7), the two groups of sliders (10) are slidably connected to the outer wall of the limit rod (7), the double-headed threaded rod (8) and the outer wall of the limit rod (7) are fixedly connected to a limit ring (9) for separating the two groups of sliders (10), and the two groups of limit rings (9) are of the same length.

6. The portable tool magazine tool changing arm for a milling cutter machining center capable of quickly changing a milling cutter according to claim 5, characterized in that: The claw knife (4) is installed with a top plate (15) by means of screw two (16); the inner wall of the slide groove (14) is rotatably connected with a threaded rod (18); the sliding block (20) is threadedly connected to the threaded section of the threaded rod (18); the inner wall of the slide groove (14) is fixedly connected with a sliding rod (19); and the sliding block (20) is slidably connected to the outer wall of the sliding rod (19).

7. The portable tool magazine tool changing arm for a milling cutter machining center capable of quickly changing a milling cutter according to claim 6, characterized in that: The side wall of the housing (1) is fixedly connected to a servo motor 2 (6); the outer walls of the two groups of claw knives (4) are fixedly connected to a servo motor 1 (5); the end of the output shaft of the servo motor 2 (6) is coaxially fixedly connected to a double-headed threaded rod (8); and the two groups of claw knives (4) are respectively coaxially fixedly connected to the threaded rod (18).

Images