A workpiece clamping mechanism for CNC machine tools

Abstract

This invention belongs to the field of machine tool processing technology, specifically a CNC machine tool workpiece clamping mechanism, including a main clamping shell and a pressure-applying component. The pressure-applying component clamps and secures a cylindrical part inserted into the axis of the main clamping shell. The pressure-applying component has an arc-shaped pressure plate, with a pressure sensor fixedly connected to the top of the inner cavity of the arc-shaped pressure plate, and a lower pressure inner shell slidably connected to the bottom of the inner cavity of the arc-shaped pressure plate via a thick spring band. During the turning process of cylindrical parts, if the clamping jaws are used directly to clamp and secure the cylindrical part, the outer wall of the shell will be concave, resulting in clamping marks. In severe cases, excessive deformation can lead to part scrap. Conversely, loose clamping jaws can prevent the cylindrical part from being clamped securely. Therefore, this device uses an inner support component inserted inside the part to cooperate with the external pressure-applying component, thereby ensuring that both the inner and outer sides of the cylindrical part are subjected to clamping force, preventing deformation of the cylindrical part due to external forces.

Description

Technical Field

[0001] This invention belongs to the field of machine tool processing technology, specifically a workpiece clamping mechanism for CNC machine tools. Background Technology

[0002] Numerical control machine tools are a type of automated machine tool equipped with a program control system. This control system can logically process programs defined by control codes or other symbolic instructions, represented by coded numbers, and input into the numerical control device via an information carrier.

[0003] Existing CNC machine tools typically use grippers and other mechanisms to hold metal objects. However, when turning hollow parts, such as hollow cylinders, directly using grippers for clamping and fixing can result in large clamping forces that cause the outer wall of the cylinder to dent, creating clamping marks. In severe cases, excessive deformation can lead to the scrapping of the part. Therefore, for this type of part, the clamping device of the machine tool needs to be improved. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this invention is as follows: a CNC machine tool workpiece clamping mechanism, comprising a main clamping shell and a pressure-applying component. This pressure-applying component can clamp and secure a cylindrical part inserted into the axis of the main clamping shell. The pressure-applying component has an arc-shaped pressure plate. A pressure sensor is fixedly connected to the top of the inner cavity of the arc-shaped pressure plate. A lower pressure inner shell is slidably connected to the bottom of the inner cavity of the arc-shaped pressure plate via a thick spring band. Both sides of the inner cavity of the lower pressure inner shell are slidably connected to wall-mounted inner plates. The surface of the arc-shaped pressure plate... A pressure rod is rotatably connected to the top, and a rotating motor is fixedly connected to the top of the pressure rod. When this device is used to clamp parts of a CNC machine tool, if it is clamping a non-cylindrical part, the inner support component of the main clamping shell cavity can be disassembled. At this time, the part is inserted into the axis of the main clamping shell, and then the pressure rod below is rotated by the rotating motor around it. The bottom end of the pressure rod pushes the arc-shaped pressure plate into the inner cavity of the main clamping shell, thereby causing the three arc-shaped pressure plates inside to squeeze the outer surface of the part, thus clamping the part.

[0005] Preferably, the inner support component provides outward support to the interior of the cylindrical part, balancing the clamping force on the outer surface of the cylindrical part. This inner support component has a fixed inner plate. Both sides of the inner cavity of the fixed inner plate are fixedly connected to sponge pads via expansion openings. Lateral support rods are also fixedly connected to both sides of the inner cavity of the fixed inner plate via sponge pads. A rotatable ball joint is rotatably connected to the center of the inner cavity of the fixed inner plate via a one-way through-hole. An internal rotating rod is fixedly connected to one side of the rotatable ball joint, and a sleeve rod is fixedly connected to the other side of the rotatable ball joint. An internal rotating rod is fixedly connected to the side of the rod surface away from the joint ball. A modified rotating shaft is fixedly connected to the end of the internal rotating rod away from the fixed inner plate. When the part is clamped, due to the reaction force, the lower inner shell and the inner plates attached to the walls on both sides are also squeezed and slide into the inner cavity of the arc-shaped pressure plate. At this time, the thick spring bands on both sides are squeezed, and then the bottom end of the pressure sensor is pressed. The pressure sensor cuts off the power to the rotating motor through the conduit on the back, thereby locking the pressure rotating rod and stopping the arc-shaped pressure plate from pressing the part. Then, the part is cut by the cutting head of the machine tool. During the turning process of cylindrical parts, if the clamping jaws are used directly to hold and fix the cylindrical parts, the clamping force of the jaws will be too large, which will cause the outer wall of the cylindrical shell to be dented, thus generating clamping indentations. In severe cases, excessive deformation will cause the part to be scrapped. On the other hand, if the jaws are too loose, the cylindrical part will not be clamped and fixed. Therefore, this device uses an inner support component inserted into the part to cooperate with an external pressure component, so that both the inner and outer sides of the cylindrical part are subjected to clamping force, avoiding the problem of deformation of the cylindrical part due to external force.

[0006] Preferably, a buffer component is included. This device buffers one end of the cylindrical part inserted into the middle of the main clamping shell cavity. One side of the surface of the buffer component is fixedly connected to the back of the surface of the main clamping shell. A traction plate is slidably connected to the side of the inner cavity of the built-in rotating rod away from the fixed inner plate. An external pull rod is fixedly connected to the top of the surface of the traction plate. Connecting plates are fixedly connected to both ends of the traction plate. A buffer spring band is fixedly connected to the side of the surface of the traction plate away from the connecting plates. When clamping a hollow cylindrical part, it is necessary not only to insert the part into the middle of the clamping shell cavity, but also to insert the modified rotating shaft inside the inner support component into the inner cavity of the cylindrical part. Then, the external pull rod is pulled to control the modified rotating shaft to slide along the straight line of the traction plate, so that the surface of the modified rotating shaft and the inner cavity of the cylindrical part are pressed against each other. Then, the outer surface of the part is tightened and fixed by the pressure component, completing the preparation work.

[0007] Preferably, the number of pressurizing components is three. The top of the surface of the arc-shaped pressure plate is slidably connected to the inner cavity of the main clamping shell through a through-cut groove. The top of the pressurizing rotating rod extends to the outside of the main clamping shell through a threaded groove. The surface of the rotating motor is fixedly connected to the surface of the main clamping shell through a threaded groove. When clamping the internal cylindrical part, the arc-shaped pressure plate of this device can be automatically pushed forward by the torsional action of the rotating motor. Before clamping the cylindrical part, the pushing operation of the rotating motor can be automatically interrupted by the feedback action of the pressure sensor, thereby avoiding the problem of over-clamping the cylindrical part and causing the cylindrical part to be unable to rotate.

[0008] Preferably, the back of the pressure sensor's inner cavity is fixedly connected to an adapter wire via a wiring port, and the top end of the adapter wire is fixedly connected to the inner cavity of the rotating motor. The bottom of the arc-shaped pressure plate surface presses against the surface of the cylindrical part. The bottom end of the pressure sensor presses against the top of the lower inner shell surface via a pressure rod. There are three internal support components. The surface of the modified rotating shaft extends into the interior of the cylindrical part, and the surface of the modified rotating shaft is in rolling connection with the interior of the cylindrical part. The surface of the fixed inner plate is in sliding connection with the inner cavity of the main clamping shell. Both ends of the fixed inner plate are fixedly connected to the inner cavity of the main clamping shell via side support rods. During operation, the part will inevitably be affected by the vibration force generated by cutting. At this time, the external pull rod rotates through the sleeve rod, and then the joint ball rotates around the inner cavity of the fixed inner plate, thereby being squeezed and buffered by the spring washer on the outer surface of the built-in rotating rod. When the fixed inner plate vibrates with the main clamping shell, it can vibrate relatively through the side support rods on both sides, thereby reducing the impact of vibration through the sponge pads on both sides.

[0009] Preferably, the modified rotating shaft includes a rotor motor. The top end of the rotor motor's output shaft is fixedly connected to the axis at the bottom of the modified rotating shaft's inner cavity. Side pressure plates are slidably connected to both sides of the modified rotating shaft's inner cavity via through-cut grooves. A pressing rod is fixedly connected to the axis of the modified rotating shaft's inner cavity. The bottom of the pressing rod's inner cavity is rotatably connected to the rotor motor's inner cavity via a connecting wire. During the cutting process, the modified rotating shaft, which is in close contact with the inner wall of the part, rotates under the control of the rotor motor. Friction force causes the inner wall of the cylindrical part to rotate and rub against it. At this time, the part rotates in the opposite direction to the rotating cutter, causing the area on the part surface pressed by the arc-shaped pressure plates to continuously change. During this process, the side pressure plates on both sides of the modified rotating shaft's inner cavity contract inwards under the pressure of the cylindrical part's inner wall, then pressurize the pressing rod, causing the rotor motor below to continue working.

[0010] Preferably, the modified rotating shaft surface is evenly provided with oblique scrapers on both sides, and both sides of the pressing rod are pressed against the surfaces of the side pressure plates by pressure rods. The surface of the rotor motor is fixedly connected to the end of the built-in rotating rod away from the fixed inner plate by a connecting insert plate. The pressurizing component can clamp the outer surface of cylindrical parts of different models through the combined arc-shaped pressure plates. Although the internal modified rotating shaft cannot completely fill the inner wall of the cylindrical part, it can control the cylindrical part to rotate in the opposite direction by external operation and meshing rotation, thereby balancing the pressing effect of the arc-shaped pressure plates on the outer surface of the cylindrical part and avoiding the problem of uneven force on the cylindrical part due to clamping.

[0011] Preferably, the buffer component includes a side frame, with a spring sleeve rod slidably connected to the top of the inner cavity of the side frame. A compression switch is fixedly connected to the back of both ends of the inner cavity of the spring sleeve rod. An extension rod is slidably connected to the front end of the compression switch via a connecting spring. An arc-shaped baffle is fixedly connected to the front end of the extension rod, and a slotted insert plate is fixedly connected to the middle of the inner cavity of the arc-shaped baffle. When the rear end of the part is inserted into the inner cavity of the main clamping shell, the front of the arc-shaped baffle is first compressed. Then, the arc-shaped baffle is pushed forward through the slotted insert plate, inserting the extension rod into the inner cavity of the side frame until the front button of the compression switch is compressed. Then, the spring sleeve rod is self-locked, preventing the part from continuing to advance and avoiding the rear end of the part penetrating the main clamping shell and compressing the surface of the external pull rod, which could cause the external pull rod to bend.

[0012] Preferably, the top of the side frame surface is fixedly connected to the back of the main clamping shell surface, the front of the arc-shaped baffle is inserted into the back of the cylindrical part through a slotted insert plate, the surface of the extension rod is slidably connected to the inner cavity of the side frame, and the surface of the arc-shaped baffle is slidably connected to the inner wall of the main clamping shell. The fixed inner plate of this device not only supports and adjusts the modified shaft, but also provides shock absorption and buffering for the cut cylindrical part and the entire device through its own structure. To avoid the problem of the traction insert plate being squeezed by the rear end of the inserted cylindrical part, causing bending deformation, a buffer component is needed to buffer the inserted cylindrical part and maintain a certain distance from the traction insert plate, thereby ensuring the guiding effect of the traction insert plate and preventing bending of the traction insert plate, which would prevent the modification shaft position from being adjusted.

[0013] Preferably, the inner wall-mounted panel includes a bottom spray plate, with an inner folding cylinder slidably connected to the center of the inner cavity of the bottom spray plate. One end of the inner cavity of the bottom spray plate is fixedly connected to the inner cavity of the inner wall-mounted panel via a fixing rod, and the other end of the inner cavity of the bottom spray plate is threadedly connected to a control push rod. The end of the control push rod away from the inner folding cylinder is slidably connected to a control motor, and the surface of the control motor is fixedly connected to the inner cavity of the inner wall-mounted panel via a snap-fit ​​shell. When the bottom of the inner wall-mounted panel is pressed against the surface of the part, the inner wall-mounted panel retracts into the inner cavity of the pressing inner shell due to the reaction force. However, the bottom of the inner wall-mounted panel remains in close contact with the surface of the part. Therefore, the control motor can push the control push rod to compress the inner folding cylinder. Then, the inner folding cylinder sprays air onto the outer surface of the part through the nozzle at the bottom. As the part rotates continuously under the action of the modified rotating shaft, the outer surface of the part is cleaned, preventing the problem of cutting debris jamming the part and preventing it from rotating.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. During the turning process of cylindrical parts, if the clamping jaws are used directly to hold and fix the cylindrical parts, the clamping force of the jaws will be too large, which will cause the outer wall of the cylindrical shell to be dented, thus generating clamping indentations. In severe cases, excessive deformation will cause the part to be scrapped. On the other hand, if the jaws are too loose, the cylindrical part will not be clamped and fixed. Therefore, this device uses an inner support component inserted into the part to cooperate with an external pressure component, so that both the inner and outer sides of the cylindrical part are subjected to clamping force, avoiding the problem of deformation of the cylindrical part due to external force.

[0016] 2. The pressurizing component can clamp the outer surface of cylindrical parts of different models through the combined arc-shaped pressure plate. Although the internal modified rotating shaft cannot completely fill the inner wall of the cylindrical part, it can control the cylindrical part to rotate in the opposite direction through external operation and meshing rotation, thereby balancing the squeezing effect of the arc-shaped pressure plate on the outer surface of the cylindrical part and avoiding the problem of uneven force on the cylindrical part due to clamping.

[0017] 3. When the arc-shaped pressure plate of the device clamps the internal cylindrical parts, it can be automatically pushed forward by the torsion action of the rotating motor. Before clamping the cylindrical parts, the pushing work of the rotating motor can be automatically interrupted by the feedback action of the pressure sensor, thereby avoiding the problem of the cylindrical parts being unable to rotate due to over-clamping.

[0018] 4. The fixed inner plate of this device not only supports and adjusts the modified shaft, but also provides shock absorption and buffering for the cut cylindrical parts and the device as a whole through its own structure. In order to avoid the problem of bending deformation caused by the rear end of the inserted cylindrical part pressing the traction plate, a buffer component is needed to buffer the inserted cylindrical part and maintain a certain distance from the traction plate, so as to ensure the guiding effect of the traction plate and prevent the traction plate from bending and causing the problem of being unable to adjust the position of the modified shaft.

[0019] 5. When the bottom of the inner wall plate is pressed against the surface of the part, the inner wall plate retracts into the inner cavity of the lower inner shell due to the reaction force. However, the bottom of the inner wall plate will be in close contact with the surface of the part. At this time, the control motor can push the control push rod to compress the inner folding cylinder. Then, the inner folding cylinder sprays air onto the outer surface of the part through the nozzle at the bottom. As the part rotates continuously under the action of the modified rotating shaft, the outer surface of the part is cleaned, thus avoiding the problem of the cutting debris getting stuck in the part and preventing the part from rotating. Attached Figure Description

[0020] Figure 1 This is a rear view of the present invention;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram of the pressurizing component of the present invention;

[0023] Figure 4 This is a cross-sectional view of the fixed inner plate of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the sleeve rod of the present invention;

[0025] Figure 6 This is a cross-sectional view of the modified rotating shaft of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the buffer component of the present invention;

[0027] Figure 8 This is a cross-sectional view of the inner wall panel of the present invention.

[0028] In the diagram: 1. Main clamping shell; 3. Pressurizing component; 31. Arc-shaped pressure plate; 32. Lower inner shell; 33. Pressure sensor; 34. Pressurizing rotating rod; 35. Rotating motor; 2. Inner support component; 21. Fixed inner plate; 22. Side support rod; 23. Sponge pad; 24. Connecting rod; 25. Joint ball; 26. Internal rotating rod; 27. Traction insert plate; 28. External pull rod; 29. ​​Connecting insert plate; 5. Modified rotating shaft; 51. Side pressure plate; 52. Pressing rod; 53. Rotor motor; 4. Buffer component; 41. Side frame; 42. Spring sleeve rod; 43. Squeeze switch; 44. Extension rod; 45. Arc-shaped baffle; 46. Slotted insert plate; 6. Inner wall plate; 61. Bottom spray plate; 62. Control motor; 63. Control push rod; 64. Inner folding cylinder. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0030] Example 1, please refer to Figures 1-6 The present invention provides a technical solution: a CNC machine tool workpiece clamping mechanism, including a main clamping shell 1 and a pressure component 3. The pressure component 3 can clamp and fasten a cylindrical part inserted into the axis of the main clamping shell 1. The pressure component 3 has an arc-shaped pressure plate 31. A pressure sensor 33 is fixedly connected to the top of the inner cavity of the arc-shaped pressure plate 31. A lower pressure inner shell 32 is slidably connected to the bottom of the inner cavity of the arc-shaped pressure plate 31 through a thick spring belt. Both sides of the inner cavity of the lower pressure inner shell 32 are slidably connected to wall-adhering inner plates 6. A pressure rotating rod 34 is rotatably connected to the top of the surface of the arc-shaped pressure plate 31. A rotating motor 35 is fixedly connected to the top of the pressure rotating rod 34.

[0031] The inner support component 2 is capable of supporting the inside of the cylindrical part outward and balancing the clamping force on the outer surface of the cylindrical part. The inner support component 2 has a fixed inner plate 21. Both sides of the inner cavity of the fixed inner plate 21 are fixedly connected to the sponge pads 23 through expansion ports. Both sides of the inner cavity of the fixed inner plate 21 are fixedly connected to the side support rods 22 through the sponge pads 23. The middle of the inner cavity of the fixed inner plate 21 is rotatably connected to the joint ball 25 through a one-way through port. One side of the joint ball 25 is fixedly connected to the built-in rotating rod 26. The other side of the joint ball 25 is fixedly connected to the sleeve rod 24. The side of the sleeve rod 24 away from the joint ball 25 is fixedly connected to the built-in rotating rod 26. The end of the built-in rotating rod 26 away from the fixed inner plate 21 is fixedly connected to the modified rotating shaft 5.

[0032] The buffer component 4 is capable of buffering one end of the cylindrical part inserted into the middle of the inner cavity of the main clamping shell 1. One side of the surface of the buffer component 4 is fixedly connected to the back of the surface of the main clamping shell 1.

[0033] A traction plate 27 is slidably connected to the inner cavity of the built-in rotating rod 26 on the side away from the fixed inner plate 21. An external pull rod 28 is fixedly connected to the top of the surface of the traction plate 27. Both ends of the traction plate 27 are fixedly connected to connecting plates 29. A buffer spring belt is fixedly connected to the side of the surface of the traction plate 27 away from the connecting plates 29.

[0034] There are three pressure components 3. The top of the surface of the arc-shaped pressure plate 31 is slidably connected to the inner cavity of the main clamping shell 1 through a through groove. The top of the pressure rotating rod 34 extends to the outside of the main clamping shell 1 through a threaded groove. The surface of the rotating motor 35 is fixedly connected to the surface of the main clamping shell 1 through a threaded groove.

[0035] The back of the inner cavity of the pressure sensor 33 is fixedly connected to the adapter wire through the wiring port, and the top end of the adapter wire is fixedly connected to the inner cavity of the rotating motor 35. The bottom of the surface of the arc-shaped pressure plate 31 is pressed against the surface of the cylindrical part. The bottom end of the pressure sensor 33 is pressed against the top of the surface of the lower inner shell 32 through the pressure rod.

[0036] There are three inner support components 2. The surface of the modified rotating shaft 5 extends into the interior of the cylindrical part. The surface of the modified rotating shaft 5 is in rolling connection with the interior of the cylindrical part. The surface of the fixed inner plate 21 is in sliding connection with the inner cavity of the main clamping shell 1. Both ends of the fixed inner plate 21 are fixedly connected to the inner cavity of the main clamping shell 1 through the side support rod 22.

[0037] The modified shaft 5 includes a rotor motor 53. The top of the output shaft of the rotor motor 53 is fixedly connected to the center of the shaft at the bottom of the inner cavity of the modified shaft 5. Side pressure plates 51 are slidably connected to both sides of the inner cavity of the modified shaft 5 through through slots. A pressing rod 52 is fixedly connected to the center of the shaft of the inner cavity of the modified shaft 5. The bottom of the inner cavity of the pressing rod 52 is rotatably connected to the inner cavity of the rotor motor 53 through a connecting wire.

[0038] The modified rotating shaft 5 has oblique scrapers evenly distributed on both sides of its surface. The pressing rod 52 is pressed against the surface of the side pressing plate 51 by the pressing rod on both sides. The surface of the rotor motor 53 is fixedly connected to the end of the built-in rotating rod 26 away from the fixed inner plate 21 by the connecting insert plate 29.

[0039] When this device is used to clamp parts of a CNC machine tool, if it is clamping a non-cylindrical part, the inner support component 2 of the inner cavity of the main clamping shell 1 can be disassembled. At this time, the part is inserted into the axis of the main clamping shell 1, and then the pressure rod 34 below is rotated by the surrounding rotating motor 35. The bottom end of the pressure rod 34 pushes the arc-shaped pressure plate 31 into the inner cavity of the main clamping shell 1, thereby causing the three arc-shaped pressure plates 31 inside to squeeze the outer surface of the part, thus clamping the part.

[0040] When the part is clamped, due to the reaction force, the inner shell 32 and the inner plates 6 attached to the sides are also squeezed and slide into the inner cavity of the arc-shaped pressure plate 31. At this time, the thick spring bands on both sides are squeezed, and then the bottom end of the pressure sensor 33 is pressed. The pressure sensor 33 cuts off the power to the rotating motor 35 through the conduit on the back, thereby locking the pressure rod 34, so that the arc-shaped pressure plate 31 stops pressing on the part, and then the cutting head of the machine tool performs cutting work on the part.

[0041] When clamping a hollow cylindrical part, it is necessary not only to insert the part into the middle of the inner cavity of the clamping shell, but also to insert the modified rotating shaft 5 inside the inner support component 2 into the inner cavity of the cylindrical part. Then, pull the external pull rod 28 to control the modified rotating shaft 5 to slide along the straight line of the traction plate 27, so that the surface of the modified rotating shaft 5 is pressed against the inner cavity of the cylindrical part. Then, the outer surface of the part is tightened and fixed by the pressure component 3 to complete the preparation work.

[0042] During the cutting process, the modified shaft 5, which is close to the inner wall of the part, rotates under the control of the rotor motor 53. It rotates and rubs against the inner wall of the cylindrical part through friction. At this time, the part rotates in the opposite direction to the rotating tool, so that the part surface is constantly pressed by the arc-shaped pressure plate 31. During this process, the side pressure plates 51 on both sides of the inner cavity of the modified shaft 5 retract into the interior under the pressure of the inner wall of the cylindrical part, and then pressurize the pressing rod 52, so that the rotor motor 53 below continues to work.

[0043] Example 2, please refer to Figures 1-8 The present invention provides a technical solution: Based on the first embodiment, the buffer component 4 includes a side frame 41, a spring sleeve rod 42 is slidably connected to the top of the inner cavity of the side frame 41, a squeeze switch 43 is fixedly connected to the back of both ends of the inner cavity of the spring sleeve rod 42, an extension rod 44 is slidably connected to the front end of the squeeze switch 43 through a connecting spring, an arc-shaped baffle 45 is fixedly connected to the front end of the extension rod 44, and a slotted insert plate 46 is fixedly connected to the middle of the inner cavity of the arc-shaped baffle 45.

[0044] The top of the side frame 41 is fixedly connected to the back of the main clamping shell 1. The front of the arc-shaped baffle 45 is inserted into the back of the cylindrical part through the slotted insert plate 46. The surface of the extension rod 44 is slidably connected to the inner cavity of the side frame 41. The surface of the arc-shaped baffle 45 is slidably connected to the inner wall of the main clamping shell 1.

[0045] The inner wall panel 6 includes a bottom spray plate 61. An inner folding cylinder 64 is slidably connected to the middle of the inner cavity of the bottom spray plate 61. One end of the inner cavity of the bottom spray plate 61 is fixedly connected to the inner cavity of the inner wall panel 6 via a fixing rod. The other end of the inner cavity of the bottom spray plate 61 is threadedly connected to a control push rod 63. A control motor 62 is slidably connected to the end of the control push rod 63 away from the inner folding cylinder 64. The surface of the control motor 62 is fixedly connected to the inner cavity of the inner wall panel 6 via a snap-fit ​​shell.

[0046] During operation, the parts will inevitably be affected by the vibration force generated by cutting. At this time, the external pull rod 28 rotates through the sleeve rod 24, and then the joint ball 25 rotates around the inner cavity of the fixed inner plate 21. The spring washer on the outer surface of the built-in rotating rod 26 is used for compression and buffering. When the fixed inner plate 21 vibrates with the main clamping shell 1, it can vibrate relatively through the side support rods 22 on both sides, thereby reducing the impact of vibration through the sponge pads 23 on both sides.

[0047] When the rear end of the part is inserted into the inner cavity of the main clamping shell 1, it will first press the front of the arc-shaped baffle 45, and then push the arc-shaped baffle 45 through the slotted insert plate 46 to insert the extension rod 44 into the inner cavity of the side frame 41 until the front button of the squeeze switch 43 is squeezed, and then control the spring sleeve rod 42 to self-lock, thereby preventing the part from continuing to advance, avoiding the rear end of the part from penetrating the main clamping shell 1 and pressing the surface of the external pull rod 28, which would cause the external pull rod 28 to be bent.

[0048] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A workpiece clamping mechanism for a CNC machine tool, comprising a main clamping housing (1), characterized in that: include, The pressure component (3) can clamp and secure the cylindrical part inserted into the shaft of the main clamping shell (1). The pressure component (3) has an arc-shaped pressure plate (31). A pressure sensor (33) is fixedly connected to the top of the inner cavity of the arc-shaped pressure plate (31). A lower pressure inner shell (32) is slidably connected to the bottom of the inner cavity of the arc-shaped pressure plate (31) through a thick spring belt. A wall-mounted inner plate (6) is slidably connected to both sides of the inner cavity of the lower pressure inner shell (32). A pressure rotating rod (34) is rotatably connected to the top of the surface of the arc-shaped pressure plate (31). A rotating motor (35) is fixedly connected to the top of the pressure rotating rod (34). The inner support component (2) can support the inside of the cylindrical part outward and balance the clamping force on the outer surface of the cylindrical part. The inner support component (2) has a fixed inner plate (21). Both sides of the inner cavity of the fixed inner plate (21) are fixedly connected to the sponge pads (23) through the expansion port. Both sides of the inner cavity of the fixed inner plate (21) are fixedly connected to the side support rods (22) through the sponge pads (23). The middle of the inner cavity of the fixed inner plate (21) is rotatably connected to the joint ball (25) through the one-way through port. One side of the joint ball (25) is fixedly connected to the built-in rotating rod (26). The other side of the joint ball (25) is fixedly connected to the sleeve rod (24). The end of the built-in rotating rod (26) away from the fixed inner plate (21) is fixedly connected to the modified rotating shaft (5). A buffer component (4) is provided to buffer one end of a cylindrical part inserted into the middle of the inner cavity of the main clamping shell (1). One side of the surface of the buffer component (4) is fixedly connected to the back of the surface of the main clamping shell (1). The modified shaft (5) includes a rotor motor (53). The top end of the output shaft of the rotor motor (53) is fixedly connected to the center of the bottom of the inner cavity of the modified shaft (5). Both sides of the inner cavity of the modified shaft (5) are slidably connected with side pressure plates (51) through through slots. A pressing rod (52) is fixedly connected to the center of the inner cavity of the modified shaft (5). The bottom of the inner cavity of the pressing rod (52) is rotatably connected to the inner cavity of the rotor motor (53) through a connecting wire. The inner wall panel (6) includes a bottom spray plate (61). An inner folding cylinder (64) is slidably connected to the middle of the inner cavity of the bottom spray plate (61). One end of the inner cavity of the bottom spray plate (61) is fixedly connected to the inner cavity of the inner wall panel (6) through a fixing rod. The other end of the inner cavity of the bottom spray plate (61) is threadedly connected to a control push rod (63). A control motor (62) is slidably connected to the end of the control push rod (63) away from the inner folding cylinder (64). The surface of the control motor (62) is fixedly connected to the inner cavity of the inner wall panel (6) through a snap-fit ​​shell.

2. The CNC machine tool workpiece clamping mechanism according to claim 1, characterized in that: A traction plate (27) is slidably connected to the inner cavity of the built-in rotating rod (26) away from the fixed inner plate (21). An external pull rod (28) is fixedly connected to the top of the surface of the traction plate (27). A connecting plate (29) is fixedly connected to both ends of the traction plate (27). A buffer spring belt is fixedly connected to the side of the surface of the traction plate (27) away from the connecting plate (29).

3. The CNC machine tool workpiece clamping mechanism according to claim 1, characterized in that: The number of pressurizing components (3) is three. The top of the surface of the arc-shaped pressure plate (31) is slidably connected to the inner cavity of the main clamping shell (1) through a through groove. The top of the pressurizing rotating rod (34) extends to the outside of the main clamping shell (1) through a threaded rotating groove. The surface of the rotating motor (35) is fixedly connected to the surface of the main clamping shell (1) through a threaded rotating groove.

4. The CNC machine tool workpiece clamping mechanism according to claim 3, characterized in that: The back of the inner cavity of the pressure sensor (33) is fixedly connected to the adapter wire through the wiring port, and the top end of the adapter wire is fixedly connected to the inner cavity of the rotating motor (35). The bottom of the surface of the arc-shaped pressure plate (31) is pressed against the surface of the cylindrical part. The bottom end of the pressure sensor (33) is pressed against the top of the surface of the lower inner shell (32) through the pressure rod.

5. The CNC machine tool workpiece clamping mechanism according to claim 4, characterized in that: The number of the inner support components (2) is three. The surface of the modified rotating shaft (5) extends into the interior of the cylindrical part. The surface of the modified rotating shaft (5) is in rolling connection with the interior of the cylindrical part. The surface of the fixed inner plate (21) is in sliding connection with the inner cavity of the main clamping shell (1). Both ends of the fixed inner plate (21) are fixedly connected to the inner cavity of the main clamping shell (1) through the side support rod (22).

6. The CNC machine tool workpiece clamping mechanism according to claim 1, characterized in that: The modified rotating shaft (5) has oblique scrapers evenly distributed on both sides of its surface. Both sides of the pressing rod (52) are pressed against the surface of the side pressing plate (51) by the pressing rod. The surface of the rotor motor (53) is fixedly connected to the end of the built-in rotating rod (26) away from the fixed inner plate (21) by the connecting insert plate (29).

7. The CNC machine tool workpiece clamping mechanism according to claim 1, characterized in that: The buffer component (4) includes a side frame (41), a spring sleeve rod (42) is slidably connected to the top of the inner cavity of the side frame (41), a squeeze switch (43) is fixedly connected to the back of both ends of the inner cavity of the spring sleeve rod (42), an extension rod (44) is slidably connected to the front end of the squeeze switch (43) through a connecting spring, an arc-shaped baffle (45) is fixedly connected to the front end of the extension rod (44), and a slotted insert plate (46) is fixedly connected to the middle of the inner cavity of the arc-shaped baffle (45).

8. A CNC machine tool workpiece clamping mechanism according to claim 7, characterized in that: The top of the side frame (41) is fixedly connected to the back of the main clamping shell (1). The front of the arc-shaped baffle (45) is inserted into the back of the cylindrical part through the slotted insert plate (46). The surface of the extension rod (44) is slidably connected to the inner cavity of the side frame (41). The surface of the arc-shaped baffle (45) is slidably connected to the inner wall of the main clamping shell (1).

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