A CNC machine with stable X-axis travel

Abstract

This invention relates to the field of CNC equipment technology, and more particularly to a CNC equipment with stable X-axis travel. It addresses the technical problem that tool chatter interferes with and disrupts the normal machining process. The invention includes a boring bar, one end of which is detachably mounted with a connector. A boring tool is detachably mounted on the side of the connector away from the boring bar. A cantilever is fixedly connected to the connector within the boring bar. A counterweight is fixedly connected to the end of the cantilever away from the connector. A fixing frame is fixedly connected to the side of the boring bar near the connector. Sealing plates are fixed to both sides of the fixing frame. The symmetrically distributed sealing plates and the fixing frame cooperate to form a liquid storage cavity, and the counterweight is located within the liquid storage cavity. This invention uses the counterweight to compress the liquid within the storage cavity, thereby buffering the vibration of the fixing frame through the compressive force of the liquid in the storage cavity. In this way, the vibration of the boring tool is buffered by the boring bar and the connector.

Description

Technical Field

[0001] This invention relates to the field of CNC equipment technology, and in particular to a CNC equipment with stable X-axis travel. Background Technology

[0002] A boring bar is a precision cutting tool mounted on a CNC machine tool. Its most common use is for machining or enlarging holes. However, during the machining of holes on the X-axis, especially when machining deep holes, factors such as the rigidity of the tool itself, its dynamic balance, and the rigidity of the workpiece can cause tool chatter. Tool chatter can interfere with and disrupt the normal hole machining process. This not only affects the surface finish of the machined hole but also the accuracy of the hole. It also shortens the tool's lifespan and can easily lead to tool breakage. Summary of the Invention

[0003] In order to overcome the shortcomings mentioned in the background art, the present invention provides a CNC device with stable X-axis travel.

[0004] The technical solution of the present invention is as follows: a CNC equipment with stable X-axis stroke, including a boring bar, a connector detachably mounted at one end of the boring bar, a boring tool detachably mounted on the side of the connector away from the boring bar, a cantilever fixedly connected to the connector and located inside the boring bar, a counterweight fixedly connected to the end of the cantilever away from the connector, a fixing frame fixedly connected to the side of the boring bar near the connector, sealing plates fixedly connected to both sides of the fixing frame, the symmetrically distributed sealing plates and the fixing frame cooperate to form a liquid storage cavity, the counterweight is located inside the liquid storage cavity, the cantilever penetrates the adjacent sealing plate and is fixedly connected to it, and a coil is wound on the outer side of the fixing frame.

[0005] To further explain, the cantilever is made of an elastic material.

[0006] To further explain, the symmetrically distributed sealing plates are all made of elastic material to adapt to changes in the volume of the liquid storage cavity, and the elastic force provided by this elastic material is greater than the sum of the gravity and tension of the liquid in the liquid storage cavity.

[0007] To further explain, the counterweight itself is magnetic, the coil becomes magnetic after being energized, and the magnetic poles on the outside of the counterweight are the same as the magnetic poles on the inside of the coil.

[0008] To further explain, the counterweight is provided with rectangular plates evenly distributed around its circumference, which is used to increase the buffering force of the liquid in the storage cavity on the counterweight.

[0009] Further explanation: It also includes a connecting shaft, which is fixedly connected to the side of the counterweight away from the cantilever. The connecting shaft passes through and is fixedly connected to the adjacent sealing plate. One end of the connecting shaft located inside the counterweight is fixedly connected to and communicates with circumferentially evenly distributed elastic telescopic rods. The telescopic end of the elastic telescopic rod is fixedly connected to the adjacent rectangular plate. The rectangular plate is slidably connected to the counterweight in a sealed manner. The boring bar has a connecting pipe embedded in it, which is fixedly connected to and communicates with the connecting shaft.

[0010] To further explain, it also includes a first circular plate, which is fixed to the end of the connecting shaft away from the counterweight. A rotating shaft is rotatably connected inside the boring bar. A second circular plate is fixed to the end of the rotating shaft near the adjacent sealing plate. The opposing sides of the first and second circular plates are jointly fixed with circumferentially evenly distributed connecting ropes.

[0011] To further explain, the diameter of the first circular plate is smaller than the diameter of the second circular plate.

[0012] To further explain, the length of the connecting rope is greater than the distance between the first circular plate and the second circular plate.

[0013] To further explain, the end of the boring bar away from the connecting member is fixedly connected to a connecting shell, a servo motor is fixedly connected inside the connecting shell, the output shaft of the servo motor is fixedly connected to the rotating shaft, and the end of the connecting tube away from the connecting shaft passes through the connecting shell.

[0014] The beneficial effects of the present invention are as follows: The present invention uses a counterweight and eight rectangular plates on it to compress the liquid in the storage cavity, thereby buffering the vibration of the fixed frame through the compressive force on the liquid in the storage cavity. In this way, the vibration of the boring bar is buffered by the boring bar and the connecting parts. At the same time, the eight rectangular plates increase the contact area between the counterweight and the liquid in the storage cavity, thereby increasing the compressive force on the liquid in the storage cavity and further buffering the vibration of the fixed frame.

[0015] This invention uses the magnetism generated by the coil to position the counterweight at the center of the fixed frame, thereby providing support for the counterweight and preventing the right side of the cantilever from bending downwards when the boring tool stops vibrating due to the characteristics of the cantilever itself, which would cause uneven mass distribution within the fixed frame and make the boring tool prone to vibration during subsequent boring processes.

[0016] This invention introduces gas into the connecting pipe through an external air pumping device, causing the rectangular plate to move outward and increasing the contact area between the rectangular plate and the liquid in the storage cavity. As a result, the pressure on the liquid in the storage cavity also increases, thereby increasing the buffering force on the fixing frame and reducing the vibration of the boring bar and cantilever.

[0017] This invention uses the output shaft of a servo motor to drive the rotating shaft to twist the circumferentially evenly distributed connecting ropes together. This stabilizes the connecting shaft through the first circular plate and buffers the vibration of the counterweight and cantilever through the connecting shaft, thus reducing the vibration of the boring bar. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural cross-sectional view of the boring bar, connector, and connecting shell of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the counterweight, fixing frame, and sealing plate of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the first circular plate, the rotating shaft, and the second circular plate of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the rectangular plate, connecting shaft, and elastic telescopic rod of the present invention.

[0023] In the above attached diagram: 1-boring rod, 2-connector, 3-boring tool, 4-cantilever, 5-counterweight, 6-fixed frame, 7-sealing plate, 8-coil, 9-rectangular plate, 10-connecting shaft, 11-elastic telescopic rod, 12-connecting pipe, 13-first circular plate, 14-rotating shaft, 15-second circular plate, 16-connecting rope, 17-connecting shell, 18-servo motor. Detailed Implementation

[0024] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0025] Actual investigation and research have revealed that boring tools are prone to vibration during hole machining (especially deep holes), which leads to a decline in machining quality and also has adverse effects on machine tools and cutting tools.

[0026] Example 1: A CNC machine with stable X-axis travel, such as Figures 1-5As shown, the machine includes a boring bar 1, which is mounted on the spindle of a CNC machine tool. A connector 2 is detachably mounted on the left end of the boring bar 1. A boring tool 3 is detachably mounted on the left side of the connector 2. A cantilever 4, made of elastic material, is fixedly connected to the right side of the connector 2 and located inside the boring bar 1. The cantilever 4 is used to accommodate the vibration of the boring tool 3. A counterweight 5, which is magnetic, is fixedly connected to the right end of the cantilever 4. A fixing frame 6 is fixedly connected to the left side of the boring bar 1. Sealing plates 7 are fixedly connected to both sides of the fixing frame 6. The symmetrically distributed sealing plates 7 and the fixing frame 6 cooperate to form a liquid storage cavity. The counterweight 5 is located inside the liquid storage cavity. Both sealing plates 7 are made of elastic material to accommodate changes in the volume of the liquid storage cavity. The elastic force supplied is greater than the sum of the weight and tension of the liquid in the storage cavity, which is used to ensure that the liquid in the storage cavity is always full. The cantilever 4 passes through the sealing plate 7 on the left and is fixed to it. The outer side of the fixed frame 6 is wound with a coil 8 that is electrically connected to the control panel of the CNC machine tool. The coil 8 becomes magnetic after being energized, and the magnetic poles on the outer side of the counterweight 5 are the same as the magnetic poles on the inner side of the coil 8. According to the principle that like poles of magnets repel and unlike poles attract, the counterweight 5 is positioned at the center of the inner circle of the fixed frame 6. The counterweight 5 is provided with eight rectangular plates 9 evenly distributed around its circumference. The rectangular plates 9 are used to increase the buffering force of the liquid in the storage cavity on the counterweight 5. At the same time, the eight rectangular plates 9 adapt to the irregular movement of the counterweight 5 when the boring tool 3 vibrates.

[0027] During the boring process of the boring tool 3, when the boring tool 3 vibrates, the control panel on the CNC machine tool stops supplying current to the coil 8, and the inner side of the coil 8 no longer has magnetism. At this time, the counterweight 5 can move freely.

[0028] During the above process, the boring bar 3 drives the boring bar 1 and the cantilever 4 to vibrate through the connecting piece 2. The boring bar 1 drives the parts on it to vibrate. The vibration of the cantilever 4 causes the counterweight 5 and the rectangular plate 9 to move irregularly within the fixed frame 6. During this process, the sealing plate 7 on the left undergoes adaptive deformation to adapt to the vibration of the cantilever 4.

[0029] When the boring bar 1 and the cantilever 4 vibrate, due to the interference of factors such as the elasticity of the cantilever 4 and the weight of the counterweight 5, the speed at which the counterweight 5 moves randomly is not the same as the vibration frequency of the fixed frame 6 (that is, the counterweight 5 and the fixed frame 6 will move relative to each other). Thus, the counterweight 5 will also slide relative to the liquid in the storage cavity. During this process, the counterweight 5 squeezes the liquid in the storage cavity, so as to buffer the vibration of the fixed frame 6 through the squeezing force of the liquid in the storage cavity. In this way, the vibration of the boring tool 3 is buffered by the boring bar 1 and the connecting piece 2.

[0030] During the irregular movement of the counterweight 5, the counterweight 5 and the eight rectangular plates 9 on it together squeeze the liquid in the storage cavity. The eight rectangular plates 9 increase the contact area between the counterweight 5 and the liquid in the storage cavity, thereby increasing the squeezing force on the liquid in the storage cavity. At the same time, the eight rectangular plates 9, which are evenly distributed around the circumference, adapt to the irregular movement of the counterweight 5. The intention is that during the irregular movement of the counterweight 5, no matter which direction the counterweight 5 moves, at least two rectangular plates 9 can fully squeeze the liquid in the storage cavity.

[0031] When the boring bar 3 stops vibrating, both the boring bar 1 and the cantilever 4 also stop vibrating. At this point, the control panel on the CNC machine tool resumes supplying current to the coil 8, which generates magnetism. However, since the magnetic poles on the outside of the counterweight 5 are the same as those on the inside of the coil 8, the magnetism generated by the coil 8 will keep the counterweight 5 at the center of the fixed frame 6, thus providing support for the counterweight 5. This prevents the right side of the cantilever 4 from bending downwards when the boring bar 3 stops vibrating due to the characteristics of the cantilever 4 itself, which would cause uneven mass distribution within the fixed frame 6 and make the boring bar 3 prone to vibration during subsequent boring processes.

[0032] In the above process, the counterweight 5 and the rectangular plate 9 are fixedly connected. However, this is only one embodiment of this application. In other embodiments, unless otherwise specified, the counterweight 5 and the rectangular plate 9 are slidably connected. That is, when manufacturing this device, the user can freely choose whether to add subsequent functions.

[0033] Example 2: Based on Example 1, such as Figures 2-5 As shown, it also includes a connecting shaft 10, which is fixed to the right side of the counterweight 5. The connecting shaft 10 passes through the sealing plate 7 on the right side and is fixed to it. The connecting shaft 10 is made of rigid material and is used to move irregularly with the counterweight 5. The left end of the connecting shaft 10 is located inside the counterweight 5, and this end is fixed to and connected to eight circumferentially evenly distributed elastic telescopic rods 11. The telescopic ends of the eight elastic telescopic rods 11 are respectively fixed to the adjacent rectangular plates 9. The rectangular plates 9 and the counterweight 5 are connected in a sealed sliding connection. The boring bar 1 is embedded with a connecting pipe 12 that is fixed to and connected to the connecting shaft 10. The connecting pipe 12 is connected to the air pumping device, and the air pumping device is electrically connected to the control panel on the CNC machine tool.

[0034] When the boring bar 1 and cantilever 4 vibrate, the control panel on the CNC machine tool controls the external air pump to introduce gas into the connecting pipe 12. The gas entering the connecting pipe 12 enters the fixed part of the eight elastic telescopic rods 11 through the connecting shaft 10, causing the telescopic ends of the eight elastic telescopic rods 11 to extend. The telescopic ends of the elastic telescopic rods 11 drive the adjacent rectangular plate 9 to move outward. After the rectangular plate 9 moves outward, its contact area with the liquid in the storage cavity increases, so the pressure on the liquid in the storage cavity also increases. This increases the buffering force on the fixed frame 6, thereby reducing the vibration of the boring bar 1 and cantilever 4.

[0035] Simultaneously, during the process of introducing gas into the connecting pipe 12 via the external air pumping device, the control panel on the CNC machine tool controls the volume of gas entering the connecting pipe 12. The control is based on the vibration frequency and amplitude of the boring bar 1 (i.e., the greater the vibration frequency and amplitude of the boring bar 1, the larger the volume of gas entering the connecting pipe 12, and the greater the extension of the elastic telescopic rod 11). This ensures that the pressure on the liquid in the storage chamber corresponds to the vibration frequency and amplitude of the boring bar 1, preventing excessive pressure on the liquid in the storage chamber due to the rectangular plate 9 moving too far outward, which would cause the boring bar 1 to vibrate in the opposite direction, or insufficient pressure on the liquid in the storage chamber due to the rectangular plate 9 moving too far outward, which would prevent the vibration of the boring bar 1 from being quickly and effectively reduced.

[0036] Example 3: Based on Example 2, such as Figures 2-4 As shown, it also includes a first circular plate 13, which is fixed to the right end of the connecting shaft 10. The right side of the boring bar 1 is rotatably connected to a rotating shaft 14, and the left end of the rotating shaft 14 is fixed to a second circular plate 15. The opposing sides of the first circular plate 13 and the second circular plate 15 are jointly fixed with circumferentially evenly distributed connecting ropes 16. The diameter of the first circular plate 13 is smaller than the diameter of the second circular plate 15, thereby ensuring that after the circumferentially evenly distributed connecting ropes 16 are hinged together, the contact points of the circumferentially evenly distributed connecting ropes 16 are close to each other. The length of the connecting rope 16 is greater than the distance between the first circular plate 13 and the second circular plate 15, so that the position of the first circular plate 13 and the second circular plate 15 will not change after the connecting rope 16, which is evenly distributed in the circumference, is hinged together. The right end of the boring bar 1 is fixedly connected to the connecting shell 17. The connecting shell 17 is fixedly connected to the servo motor 18, which is electrically connected to the control panel on the CNC machine tool. The output shaft of the servo motor 18 is fixedly connected to the rotating shaft 14. The right end of the connecting tube 12 passes through the connecting shell 17.

[0037] When the boring bar 1 and the cantilever 4 vibrate, the control panel on the CNC machine tool starts the servo motor 18. The output shaft of the servo motor 18 drives the rotating shaft 14 to rotate. The rotating shaft 14 drives the circumferentially evenly distributed connecting rope 16 to rotate through the second circular plate 15, so that the circumferentially evenly distributed connecting rope 16 is twisted together. This stabilizes the connecting shaft 10 through the first circular plate 13, and buffers the vibration of the counterweight 5 and the cantilever 4 through the connecting shaft 10, thus reducing the vibration of the boring bar 1.

[0038] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all variations and equivalent structures and functions.

Claims

1. A CNC machine with stable X-axis stroke, comprising a boring bar (1), wherein a connector (2) is detachably mounted on one end of the boring bar (1), and a boring tool (3) is detachably mounted on the side of the connector (2) away from the boring bar (1), characterized in that: It also includes a cantilever (4) located inside the boring bar (1), the cantilever (4) being fixed to the connector (2), a counterweight (5) being fixed to one end of the cantilever (4) away from the connector (2), a fixing frame (6) being fixed to one side of the boring bar (1) near the connector (2), and sealing plates (7) being fixed to both sides of the fixing frame (6). The symmetrically distributed sealing plates (7) and the fixing frame (6) cooperate to form a liquid storage cavity, the counterweight (5) being located inside the liquid storage cavity, the cantilever (4) penetrating the adjacent sealing plate (7) and being fixed to it, and a coil (8) being wound around the outside of the fixing frame (6). The counterweight (5) is provided with rectangular plates (9) evenly distributed in the circumference, which are used to increase the buffering force of the liquid in the storage cavity on the counterweight (5); It also includes a connecting shaft (10), which is fixed to the side of the counterweight (5) away from the cantilever (4). The connecting shaft (10) passes through the adjacent sealing plate (7) and is fixed to it. One end of the connecting shaft (10) located inside the counterweight (5) is fixed to and connected to a circumferentially evenly distributed elastic telescopic rod (11). The telescopic end of the elastic telescopic rod (11) is fixed to the adjacent rectangular plate (9). The rectangular plate (9) is in a sealed sliding connection with the counterweight (5). The boring bar (1) is embedded with a connecting pipe (12) that is fixed to and connected to the connecting shaft (10). It also includes a first circular plate (13), which is fixed to the end of the connecting shaft (10) away from the counterweight (5). A rotating shaft (14) is rotatably connected inside the boring bar (1). A second circular plate (15) is fixed to the end of the rotating shaft (14) near the adjacent sealing plate (7). A circumferentially evenly distributed connecting rope (16) is fixed to the opposing sides of the first circular plate (13) and the second circular plate (15). The boring bar (1) is fixedly connected to a connecting shell (17) at one end away from the connecting member (2). A servo motor (18) is fixedly connected inside the connecting shell (17). The output shaft of the servo motor (18) is fixedly connected to the rotating shaft (14). The connecting tube (12) is connected to the connecting shell (17) at one end away from the connecting shaft (10). The cantilever (4) is made of an elastic material; The symmetrically distributed sealing plates (7) are all made of elastic material to adapt to changes in the volume of the liquid storage cavity, and the elastic force provided by this elastic material is greater than the sum of the gravity and tension of the liquid in the liquid storage cavity; The counterweight (5) is magnetic, the coil (8) is magnetic after being energized, and the magnetic poles on the outside of the counterweight (5) are the same as the magnetic poles on the inside of the coil (8).

2. The X-axis stroke-stabilized CNC equipment according to claim 1, characterized in that: The diameter of the first circular plate (13) is smaller than the diameter of the second circular plate (15).

3. A CNC machine with stable X-axis stroke according to claim 2, characterized in that: The length of the connecting rope (16) is greater than the distance between the first circular plate (13) and the second circular plate (15).

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