Numerical control tool rest for numerical control machine tool

Abstract

This invention relates to the field of CNC machine tool technology, specifically to a CNC tool post for a CNC machine tool. The solution includes a CNC machine tool, a cross slide, a CNC tool post, a position adjustment mechanism, a spindle adjustment mechanism, an auxiliary force-boosting mechanism, an auxiliary turning mechanism, and a positioning mechanism. The position adjustment mechanism is located within the slide groove of the CNC tool post. The spindle adjustment mechanism, through a lifting assembly, cooperates with the reference panel of the positioning mechanism to achieve rapid and accurate tool height calibration without shims. The auxiliary force-boosting mechanism and the auxiliary turning mechanism employ a combination of hydraulic and spring force amplification, allowing the auxiliary rollers to adaptively conform to the surface of the slender shaft, effectively suppressing dynamic eccentricity. The positioning mechanism also includes an elastic limit clamp for fixing the coolant spray pipe and guiding the coolant spray in a directional manner. This invention solves the problems of traditional tool posts relying on shims for height adjustment, interference with large-diameter machining, and eccentric vibration of slender shafts, significantly improving machining adaptability, stability, and economy.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool technology, and more specifically to a CNC tool post for a CNC machine tool. Background Technology

[0002] Traditional CNC lathe tool turrets only have two degrees of freedom: the X-axis radial and the Z-axis axial, lacking independent Y-axis vertical movement. This means that adjusting the height of the cutting edge relative to the spindle centerline relies entirely on adding or removing shims between the tool holder and the tool turret. After each tool change or sharpening, the operator must repeatedly disassemble and reassemble the tool, performing test cuts to verify the result—a cumbersome process with limited accuracy. More importantly, the structural geometry of the tool turret severely limits the tool's extension length. When machining large-diameter discs, flanges, or thin-walled cylinders, if the workpiece radius exceeds the tool's extension distance, the tool turret body will physically collide with the workpiece, forcing the operator to use an extended tool holder or deflect the tool turret angle, significantly reducing system rigidity. Therefore, there is a need for a CNC tool turret that can solve these problems. Summary of the Invention

[0003] This invention provides a CNC tool post for CNC machine tools to solve the aforementioned technical problems.

[0004] The present invention adopts the following technical solution: It includes a CNC machine tool, a cross slide, a CNC tool post, a position adjustment mechanism for changing the position of the turning tool, a spindle adjustment mechanism for calibrating the height of the turning tool, an auxiliary force-boosting mechanism for buffering and distance compensation during the operation of the auxiliary turning mechanism, an auxiliary turning mechanism for stabilizing the turning operation by conforming to the object during the turning process, and a positioning mechanism for calibrating the height of the turning tool. The CNC machine tool is placed on the ground, and the cross slide is mounted on the CNC machine tool. The cross slide consists of a transverse feed device and a longitudinal feed device. The CNC tool post is located on the transverse feed device and on the longitudinal feed device. The CNC tool post has four sliding grooves, each located at a desired tool mounting position. Four position adjustment mechanisms are provided, each positioned within a corresponding sliding groove on the CNC tool post. Four axis adjustment mechanisms are also provided, each positioned on a corresponding position adjustment mechanism. An auxiliary force-boosting mechanism is located on the side of the transverse feed device. An auxiliary turning mechanism is positioned on the auxiliary force-boosting mechanism, and a positioning mechanism is positioned on the auxiliary force-boosting mechanism.

[0005] Furthermore, each of the four position adjustment mechanisms includes a main board, a slave board, a position adjustment knob, and two first bolts. The main board and the slave board are connected by the two first bolts to form a single unit, both located in the slide groove of the CNC tool post and slidably fitted. The upper interior of both the main board and the slave board is hollow. There are two position adjustment knobs, which are symmetrically arranged. The ends of the two position adjustment knobs pass through the outer side of the CNC tool post into the corresponding slide groove and abut against the outer surface of the slave board. Both position adjustment knobs are threadedly connected to the CNC tool post.

[0006] Furthermore, each of the four shaft adjustment mechanisms includes a drive assembly and a lifting assembly. The drive assembly is mounted on the corresponding slave plate, and the lifting assembly is connected to the drive assembly via transmission and is located on the main plate. The drive assembly includes a drive shaft, a drive helical gear, a fixed bracket, and a hexagonal nut. The drive shaft is rotatably connected to the corresponding slave plate, and the end of the drive shaft is located in the hollow upper part of the corresponding slave plate. The drive helical gear is located at the end of the drive shaft. The fixed bracket is located on the outside of the slave plate. The drive shaft has an external thread in its middle section. The middle section of the drive shaft passes through the fixed bracket but does not contact the fixed bracket. There are two hexagonal nuts, which are symmetrically sleeved on the middle section of the drive shaft and located on both sides of the fixed bracket. Both hexagonal nuts are threadedly connected to the middle section of the drive shaft.

[0007] Furthermore, the lifting assembly includes a lifting helical gear, a lifting shaft, a sprocket, a chain, a lifting frame, and a lifting housing. There are three lifting shafts, equidistantly arranged on corresponding main boards, with the lower ends of each shaft vertically penetrating the hollow portion of the upper part of the main board. All three shafts are threadedly connected to the main board. There are three sprockets, each located at the lower end of a corresponding lifting shaft. The chain is connected to the three sprockets and meshes with them. The lifting helical gear is located below the corresponding sprocket and meshes with a drive helical gear. There are three lifting frames, each partially sleeved on a corresponding lifting shaft and threadedly connected. The lower ends of the three lifting frames are slidably fitted onto the main board. The lifting housing is located at the upper end of the three lifting frames.

[0008] Furthermore, the lifting frame is provided with a knife placement groove, and the knife placement groove is provided with anti-slip texture.

[0009] Furthermore, the auxiliary force-enhancing mechanism includes a moving component and a force-enhancing component. The moving component is disposed on the side of the transverse feed device, and the force-enhancing component is disposed on the moving component. The moving component includes a moving track, a moving bolt, a moving frame, and a moving hydraulic cylinder. Several moving bolts are provided. The moving track is connected to the side of the transverse feed device through corresponding moving bolts. The moving frame is disposed on the outer side of the moving track, and the moving hydraulic cylinder is disposed on the moving frame.

[0010] Furthermore, the force-enhancing component includes a first force-enhancing frame, a second force-enhancing frame, and springs. The first and second force-enhancing frames are slidably located within the moving track, and the first and second force-enhancing frames are slidably coupled. Two springs are provided, and the two springs are symmetrically arranged. The first and second force-enhancing frames are connected by the two springs.

[0011] Furthermore, the auxiliary turning mechanism includes an auxiliary block, an upper connecting rod, a lower connecting rod, auxiliary rollers, and auxiliary knobs. The second force-enhancing frame has an auxiliary groove facing the CNC tool holder. There are two auxiliary blocks, which are symmetrically arranged in the auxiliary groove and are both slidably fitted. The upper connecting rod is inclined upward and the lower connecting rod is inclined downward, so that the two auxiliary rollers are staggered in the vertical direction, forming a two-point support or clamping fit on the workpiece surface. There are two auxiliary rollers, which are rotatably connected to the front ends of the upper and lower connecting rods, respectively. There are two auxiliary knobs, whose ends penetrate into the auxiliary groove and abut against the surface of the corresponding auxiliary block. Both auxiliary knobs are threadedly connected to the second force-enhancing frame.

[0012] Furthermore, the positioning mechanism includes a positioning track, a positioning panel, and a positioning knob. The positioning track is located on the side of the second force-increasing frame. The positioning panel is slidably disposed inside the positioning track. The positioning knob passes through the positioning track and abuts against the outer surface of the positioning panel. The bottom height of the positioning panel is consistent with the height of the turning tool to be calibrated. The height of the turning tool is consistent with the axis height of the three-jaw chuck. The positioning panel is located directly above the lifting frame.

[0013] Furthermore, a limiting clip is provided above the positioning panel, and the limiting clip is elastic.

[0014] The above-described at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects: Firstly, by rotating the positioning knob, the positioning panel is unlocked and pulled out from the positioning track to directly above the lifting frame. The bottom height of the positioning panel is preset to be consistent with the center height of the three-jaw chuck shaft, serving as a calibration reference. Next, loosen the two hexagonal nuts in the middle of the drive shaft to allow it to rotate. Rotating the drive shaft drives the drive helical gear, which in turn drives the lifting helical gear and its corresponding lifting shaft. Through the synchronous transmission of the sprocket and chain, the three lifting shafts rotate synchronously, driving the three lifting frames to smoothly rise or fall in coordination with the upper and lower sliding limit switches on the main board. When the top of the turning tool inside the lifting frame contacts the bottom of the positioning panel, it indicates that the tool height has been calibrated to the axis height. At this point, tighten the two hexagonal nuts to lock the drive shaft and push the positioning panel back to its original position. The entire process requires no removal or installation of shims and no test cuts for verification, achieving fast, accurate, and stable tool height calibration.

[0015] Secondly, the operator of this device rotates two position adjustment knobs according to the workpiece radius to disengage the latter from the slave plate. At this point, the slave plate can slide freely within the groove of the CNC tool holder. Pushing the slave plate forward or backward changes the extension length of the turning tool mounted in the lifting frame above it. After adjustment, rotating the position adjustment knob in the opposite direction locks the slave plate, and then the tool is secured to the lifting frame by bolts on the CNC tool holder. The anti-slip texture in the tool placement groove further enhances the stability of the fixation after bolt contact, achieving interference-free machining of large-diameter workpieces while ensuring tool stability.

[0016] Thirdly, when processing slender shaft-like workpieces, the moving hydraulic cylinder is activated, driving the moving frame to move along the moving track towards the workpiece. This causes the first and second force-boosting frames to slide. The two auxiliary rollers are respectively mounted on symmetrical auxiliary blocks via upper and lower connecting rods and fit against the outer surface of the workpiece. The spring provides initial preload, ensuring the two auxiliary rollers remain in contact with the workpiece. When the workpiece is thrown outwards due to eccentricity, the auxiliary rollers are compressed, increasing the spring force to prevent the rollers from bouncing and push the workpiece back to the ideal axis. When the workpiece deviates to the other side, the spring automatically extends to push the rollers to fill the gap. Active force amplification compensation: The continuous thrust or pull of the moving hydraulic cylinder in standby mode, combined with the spring force, creates a compound force amplification effect, achieving overload buffering. Local protrusions or depressions on the workpiece surface can be adaptively absorbed, essentially forming a variable-radius follower bearing on the workpiece surface.

[0017] Fourth, when the workpiece rotates at high speed, the coolant is first sprayed between the auxiliary roller and the workpiece. Since the rotation direction of the workpiece is opposite to the rolling direction of the auxiliary roller, the coolant is not easily thrown out by centrifugal force. Some of the coolant adheres to the surface of the auxiliary roller and is evenly transferred to the surface of the workpiece as the roller rotates, achieving continuous immersion cooling. Even if a small amount of coolant is thrown out, it will be blocked by the two auxiliary rollers and reabsorbed. Compared with the traditional direct spraying method, this device reduces coolant splashing waste, improves cooling efficiency, and reduces costs and environmental pollution. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial schematic diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the CNC tool post, axis adjustment mechanism, and position adjustment mechanism in this invention; Figure 4 This is a three-dimensional structural diagram of the shaft adjustment mechanism in this invention; Figure 5 This is a three-dimensional structural diagram of the shaft adjustment mechanism and the position adjustment mechanism in this invention; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a three-dimensional structural diagram of the driving component and the lifting component in this invention; Figure 8 This is a three-dimensional structural diagram of the auxiliary force-boosting mechanism, auxiliary turning mechanism, and positioning mechanism in this invention. Figure 1 ; Figure 9 This is a three-dimensional structural diagram of the auxiliary force-boosting mechanism, auxiliary turning mechanism, and positioning mechanism in this invention. Figure 2 ; Figure 10 for Figure 9 Enlarged view at point B in the middle; Figure 11 This is a schematic diagram of the turning tool height adjustment state in this invention; Figure 12 for Figure 11 Enlarged view at point C; Figure 13 This is a schematic diagram of the workpiece turning state in this invention; Figure 14 for Figure 13 Enlarged view of point D in the middle.

[0019] Reference numerals: 1. CNC machine tool; 11. Cross slide; 2. CNC tool post; 22. Slide groove; 3. Position adjustment mechanism; 31. Main board; 32. Slave board; 33. Position adjustment knob; 34. First bolt; 4. Axis adjustment mechanism; 41. Drive assembly; 411. Drive shaft; 412. Drive helical gear; 413. Fixed bracket; 414. Hexagonal nut; 42. Lifting assembly; 421. Lifting helical gear; 422. Lifting shaft; 423. Sprocket; 424. Chain; 425. Lifting frame; 426. Tool holder. 427, 5, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 52, 52, 52, 52, 52, 52, 6, 6, 61, 62, 63, 64, 65, 66, 7, 7, 71, 72, 73, 74, 75, 76, 71, 72, 73, 74. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Reference Figures 1 to 14 The image shows a CNC tool post for a CNC machine tool. The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] This invention provides a CNC tool post for a CNC machine tool, including a CNC machine tool 1, a cross slide 11, a CNC tool post 2, a position adjustment mechanism 3 for changing the position of a turning tool, a spindle adjustment mechanism 4 for calibrating the height of the turning tool, an auxiliary force boosting mechanism 5 for buffering and distance compensation during the operation of an auxiliary turning mechanism 6, an auxiliary turning mechanism 6 for stabilizing the turning operation by conforming to the object during the turning process, and a positioning mechanism 7 for calibrating the height of the turning tool. The CNC machine tool 1 is placed on the ground, and the cross slide 11 is mounted on the CNC machine tool 1. The cross slide 11 consists of a transverse feed device and a longitudinal feed device. The CNC tool post 2 is located on the transverse feed device and on the longitudinal feed device. The CNC tool post 2 has four slide grooves 22, which are respectively located at the required tool installation positions on the CNC tool post 2. There are four position adjustment mechanisms 3, which are respectively located in the corresponding slide grooves 22 on the CNC tool post 2. There are four axis adjustment mechanisms 4, which are respectively located on the corresponding position adjustment mechanisms 3. The auxiliary force boosting mechanism 5 is located on the side of the transverse feed device. The auxiliary turning mechanism 6 is located on the auxiliary force boosting mechanism 5. The positioning mechanism 7 is located on the auxiliary force boosting mechanism 5. Compared to existing technologies, this device integrates position adjustment, axis calibration, auxiliary support, and cooling guidance into one unit: Through the linkage between the positioning panel 72 and the lifting assembly 42, it achieves rapid and accurate tool height calibration without shims; the position adjustment knob 33 allows for stepless adjustment of the tool extension length, completely avoiding tool holder interference during large-diameter machining; with the combined force amplification of spring 523 and hydraulic pressure, the auxiliary roller 64 adaptively conforms to the surface of the slender shaft, effectively suppressing dynamic eccentricity and significantly reducing the risk of tool breakage; simultaneously, the limiting clamp 74 guides the coolant spray in a directional manner, reducing splashing waste. Overall, it significantly improves the machining adaptability, stability, and economy of the CNC tool holder 2.

[0023] The component on the CNC machine tool 1 that can move along the X and Y axes is called the cross slide 11. The X axis is the horizontal movement to the left and right, and in this article, the X axis is named the transverse feed device. The Y axis is the horizontal movement to the front and back, and in this article, the Y axis is named the longitudinal feed device.

[0024] In a further preferred embodiment of the present invention, each of the four position adjustment mechanisms 3 includes a main board 31, a slave board 32, a position adjustment knob 33, and a first bolt 34. There are two first bolts 34. The main board 31 and the slave board 32 are connected by the two first bolts 34 to form a whole. They are both located in the slide groove 22 of the CNC tool holder 2 and are slidably fitted. The upper interior of the main board 31 and the slave board 32 are hollow. There are two position adjustment knobs 33. The two position adjustment knobs 33 are symmetrically arranged. The ends of the two position adjustment knobs 33 pass through the outer side of the CNC tool holder 2 into the corresponding slide groove 22 and abut against the outer surface of the slave board 32. Both position adjustment knobs 33 are threadedly connected to the CNC tool holder 2. The slave plate 32 of the position adjustment mechanism 3 moves within the slide groove 22, driving the entire shaft adjustment mechanism 4, including the main plate 31 and the lifting assembly 42, to move synchronously. This enables independent adjustment of the tool extension length and the tool height. First, the extension length is adjusted to avoid interference with the tool holder, and then the height is adjusted to align with the shaft. The two do not interfere with each other and can be locked after adjustment, significantly improving the adaptability of machining large-diameter workpieces.

[0025] In a further preferred embodiment of the present invention, each of the four shaft adjustment mechanisms 4 includes a drive assembly 41 and a lifting assembly 42. The drive assembly 41 is disposed on the corresponding slave plate 32. The lifting assembly 42 is connected to the drive assembly 41 by transmission and is located on the main plate 31. The drive assembly 41 includes a drive shaft 411, a drive helical gear 412, a fixed bracket 413, and a hexagonal nut 414. The drive shaft 411 is rotatably connected to the corresponding slave plate 32, and the end of the drive shaft 411 is located in the hollow part of the upper part of the corresponding slave plate 32. The drive helical gear 412 is located at the end of the drive shaft 411, the fixed bracket 413 is located on the outside of the plate 32, the drive shaft 411 has an external thread in the middle, the middle of the drive shaft 411 passes through the fixed bracket 413 and does not contact the fixed bracket 413, two hexagonal nuts 414 are provided, the two hexagonal nuts 414 are symmetrically sleeved on the middle of the drive shaft 411 and the two hexagonal nuts 414 are located on both sides of the fixed bracket 413, and both hexagonal nuts 414 are threadedly connected to the middle of the drive shaft 411; The bottom of the positioning panel 72 of the positioning mechanism 7 of this device is preset to the height of the three-jaw chuck shaft. The lifting frame 426 of the reference shaft adjustment mechanism 4 drives the tool to rise to contact the positioning panel 72, transforming the traditional trial cutting and shim experience calibration into physical limit calibration of the reference surface. This achieves fast and accurate height alignment without shims or trial cutting, with high calibration accuracy and good repeatability.

[0026] Two hexagonal nuts 414 are symmetrically fitted in the middle of the drive shaft 411, located on both sides of the fixed bracket 413. When the nuts are loosened, the drive shaft 411 can rotate freely; when the nuts are tightened so that they abut against the fixed bracket 413, the drive shaft 411 is locked. This achieves quick unlocking and reliable locking of the drive shaft 411, ensuring both flexible transmission during height adjustment and preventing additional vibration or displacement of the drive shaft 411 during cutting operations.

[0027] In a further preferred embodiment of the present invention, the lifting assembly 42 includes a lifting helical gear 421, a lifting shaft 422, a sprocket 423, a chain 424, a lifting frame 425, and a lifting frame 426. Three lifting shafts 422 are provided, equidistantly arranged on corresponding main plates 31, with the lower ends of each shaft vertically penetrating the upper hollow portion of the main plate 31. All three shafts 422 are threadedly connected to the main plate 31. Three sprockets 423 are provided, each positioned on a corresponding... At the lower end of the lifting shaft 422, the chain 424 is connected to three sprockets 423 and meshes with each other. The lifting helical gear 421 is located below the corresponding sprocket 423. The lifting helical gear 421 meshes with the driving helical gear 412. There are three lifting frames 425. The middle parts of the three lifting frames 425 are respectively sleeved on the corresponding lifting shaft 422 and are all threaded. The lower ends of the three lifting frames 425 are respectively slidably engaged with the main board 31. The lifting frame 426 is located at the upper end of the three lifting frames 425. Currently, the height of the cutting edge of a turning tool relative to the spindle centerline can only be adjusted by adding or removing shims between the tool holder and the tool post. Although tightening the shims ensures tool stability, the operator must disassemble and reassemble the tool and add or remove shims after each tool change or sharpening, and the accuracy of height adjustment is limited. This device solves this problem while ensuring convenient operation and safe and stable operation. When the turning tool needs height adjustment, firstly, the two hexagonal nuts 414 are rotated to loosen and abut against both sides of the fixed bracket 413, so that the drive shaft 4... 11 and the lower plate 32 are in a rotatable connection state. At this time, the lifting frame 426 is lowered to its lowest point by gravity without any fixing force. Then, the turning tool is placed in the tool placement slot 427 inside the lowering frame. After the turning tool is placed inside the lowering frame, the two are in a straight line and parallel state. At this time, the drive shaft 411 needs to be rotated. The rotation of the drive shaft 411 will drive the drive helical gear 412 to rotate. The rotation of the drive helical gear 412 will drive the lifting helical gear 421 to rotate. The rotation of the lifting helical gear 421 will drive the corresponding lifting shaft 422 to rotate. Rotation of 422 will drive the corresponding sprocket 423 to rotate, which in turn drives the chain 424 to move. This will cause several sprockets 423 to rotate synchronously, which in turn drives the corresponding lifting shaft 422 to rotate synchronously. This, in turn, causes the corresponding lifting frame 425 to move up or down on the lifting shaft 422. The lifting frames 425 are in a sliding limit engagement state with the main board 31, which will ultimately drive the lifting frame 426 to move up or down, thus enabling the turning tool placed inside the lifting frame 426 to move upward or downward. The three lifting shafts 422 are adjusted downwards to the desired working height of the turning tool. Each of the three lifting shafts 422 has a sprocket 423 at its lower end. The chain 424 meshes with the three sprockets 423 to form a synchronous transmission circuit, ensuring that the three lifting shafts 422 rotate absolutely synchronously. As a result, the three lifting frames 425 rise and fall synchronously. The lifting frame 426 always maintains a horizontal posture to prevent the tool from tilting. After the turning tool height is adjusted, the two hexagonal nuts 414 are rotated to abut against both sides of the fixed bracket 413. The bolts abut against each other to ensure that the turning tool is in a secure state for operation.

[0028] In a further preferred embodiment of the present invention, the lifting frame 426 is provided with a knife placement groove 427 inside, and the knife placement groove 427 is provided with anti-slip texture. Currently, after the turning tool is fixed on the CNC tool holder 2, the distance its head extends beyond the body of the CNC tool holder 2 is limited. When turning workpieces with large radii, such as large-diameter discs, flanges, or thin-walled cylinders, the turning tool head must be able to reach the outer surface of the workpiece. If the workpiece radius exceeds the extension length of the turning tool, the CNC tool holder 2 itself, and the non-turning tool, will physically collide with the workpiece, resulting in failure to cut. In this case, the operator is often forced to use an extended tool holder or deflect the tool holder angle, but this will drastically reduce the turning rigidity. This device solves this problem. After placing the turning tool in the tool placement slot 427 for preparation, the extension distance of the turning tool can be adjusted according to the radius of the workpiece. Rotating the two position adjustment knobs 33 disengages the ends of the two position adjustment knobs 33 from contact with the outer surface of the slave plate 32. When the plate 32 is in the corresponding slide groove 22 and is in a sliding state, the plate 32 is pushed forward or pulled backward to adjust the extension distance of the turning tool above it. The extension length of the turning tool can be adjusted in this simple way, which can adapt to various workpiece turning operations. After the turning tool is adjusted, the two position adjustment knobs 33 are rotated so that the ends of the two position adjustment knobs 33 abut against the outer surface of the plate 32, and the plate 32 is locked in the slide. Then, the turning tool is fastened in the lifting frame 426 by the bolts on the CNC tool holder 2. This device achieves the required function on the premise of ensuring the stable fixation of the turning tool. The anti-slip texture inside the tool placement groove 427 can make it easier for the bolt to abut against the stability of the turning tool after fixation, ensuring the safety during operation and increasing the turning rigidity.

[0029] In a further preferred embodiment of the present invention, the auxiliary force-enhancing mechanism 5 includes a moving component 51 and a force-enhancing component 52. The moving component 51 is disposed on the side of the transverse feed device, and the force-enhancing component 52 is disposed on the moving component 51. The moving component 51 includes a moving track 511, moving bolts 512, a moving frame 513, and a moving hydraulic cylinder 514. A plurality of moving bolts 512 are provided. The moving track 511 is connected to the side of the transverse feed device via corresponding moving bolts 512. The moving frame 513 is disposed on the outer side of the moving track 511. The moving hydraulic cylinder... 514 is mounted on the movable frame 513; the force-enhancing component 52 includes a first force-enhancing frame 521, a second force-enhancing frame 522, and a spring 523. The first force-enhancing frame 521 is connected to the output end of the movable hydraulic cylinder 514 on its side. The first force-enhancing frame 521 and the second force-enhancing frame 522 are slidably located within the movable track 511. The first force-enhancing frame 521 and the second force-enhancing frame 522 are slidably fitted together. There are two springs 523, which are symmetrically arranged. The first force-enhancing frame 521 and the second force-enhancing frame 522 are connected by the two springs 523. The auxiliary force-boosting mechanism 5 of this device uses a moving hydraulic cylinder 514 to push the first force-boosting frame 521 and the second force-boosting frame 522 to slide along the moving track 511, thereby driving the auxiliary roller 64 of the auxiliary turning mechanism 6 to fit against the workpiece. The spring 523 is connected between the first force-boosting frame 521 and the second force-boosting frame 522 to provide preload and buffer, forming a composite follow-up support system with active hydraulic propulsion and passive adaptive spring 523. This system can actively compensate for large-range eccentricity and passively absorb small jumps, effectively suppressing dynamic eccentricity of slender shafts.

[0030] In a further preferred embodiment of the present invention, the auxiliary turning mechanism 6 includes an auxiliary block 61, an upper connecting rod 62, a lower connecting rod 63, auxiliary rollers 64, and auxiliary knobs 65. The second force-enhancing frame 522 is provided with an auxiliary groove 66 facing the side of the CNC tool holder 2. There are two auxiliary blocks 61, which are symmetrically arranged in the auxiliary groove 66 and are both slidably fitted. The upper connecting rod 62 is inclined upward and the lower connecting rod 63 is inclined downward, so that the two auxiliary rollers 64 are staggered in the vertical direction, forming a two-point support or clamping fit for the workpiece surface. There are two auxiliary rollers 64, which are rotatably connected to the front ends of the upper connecting rod 62 and the lower connecting rod 63, respectively. There are two auxiliary knobs 65, whose ends penetrate into the auxiliary groove 66 and abut against the surface of the corresponding auxiliary block 61. Both auxiliary knobs 65 are threadedly connected to the second force-enhancing frame 522. Currently, when working with slender shaft-like workpieces, the workpiece rotation generates dynamic eccentricity. This eccentricity causes drastic fluctuations in the instantaneous cutting depth of the turning tool, resulting in anything from chatter marks to tool breakage. This device effectively suppresses this problem, thereby reducing damage to the turning tool and saving costs. It also reduces the inconvenience of tool replacement. When working with slender shaft-like workpieces, the moving hydraulic cylinder 514 activates the force-enhancing component 52, moving it towards the workpiece. Finally, it causes the auxiliary turning mechanism 6 to contact the workpiece surface. As the workpiece rotates during the operation, the two auxiliary rollers... The auxiliary roller 64 is attached to the outer surface of the workpiece. When the workpiece is thrown outward due to eccentricity, the auxiliary roller 64 is squeezed and generates a reaction force. This is activated by the moving hydraulic cylinder 514 to push the workpiece back to a position closer to the ideal axis. When the workpiece deviates to the other side, the force of the spring 523 is equivalent to the retracted state, and the auxiliary roller 64 actively follows to fill the gap. This forms a follow-up constraint, limiting the radial runout of the workpiece to a very small range. The principle is that the spring 523 provides an initial preload, ensuring that the two auxiliary rollers 64 always maintain contact with the workpiece surface. When a local bulge appears on the workpiece, the two auxiliary rollers 64... When the workpiece is compressed, the force of spring 523 increases, ensuring that the two auxiliary rollers 64 do not bounce. When the workpiece is concave, spring 523 automatically extends to push the two auxiliary rollers 64 to follow, always keeping them in contact. This is equivalent to forming a variable-radius follower bearing on the workpiece surface. In other words, this device can use the moving hydraulic cylinder 514 to drive the auxiliary turning mechanism 6 to the required position, and then use the contact state of the two auxiliary rollers 64 and the cooperation of spring 523 to provide auxiliary support. Alternatively, after the moving hydraulic cylinder 514 drives the auxiliary turning mechanism 6 to the required position, it can continuously move the hydraulic cylinder to provide support. When cylinder 514 is in standby mode, it pushes or retracts the two auxiliary rollers 64, causing the two auxiliary rollers 64 to be in contact with the workpiece. The upper connecting rod 62 is tilted upward and the lower connecting rod 63 is tilted downward, so that the two auxiliary rollers 64 are staggered in the vertical direction, forming a two-point support or clamping contact on the workpiece surface. This effectively suppresses the swaying of the workpiece in the vertical plane, realizes the overload buffering of the workpiece, ensures the safety of operation and the accuracy of workpiece turning, and at the same time can prevent the workpiece from being squeezed and deformed, damage to the turning tool, and reduce the damage of the turning tool, thus saving costs.

[0031] In a further preferred embodiment of the present invention, the positioning mechanism 7 includes a positioning track 71, a positioning panel 72, and a positioning knob 73. The positioning track 71 is located on the side of the second force-enhancing frame 522. The positioning panel 72 is slidably disposed inside the positioning track 71. The positioning knob 73 passes through the positioning track 71 and abuts against the outer surface of the positioning panel 72. The bottom height of the positioning panel 72 is consistent with the height of the turning tool to be calibrated. The height of the turning tool is consistent with the axis height of the three-jaw chuck. The positioning panel 72 is located directly above the lifting frame 426. In this device, the positioning panel 72 serves as the positioning point for the axis height of the three-jaw chuck in the CNC machine tool 1. When the turning tool needs to be adjusted in height, this device does not require comparison at the axis of the three-jaw chuck or even verification of the height through trial turning. Simply rotate the positioning knob 73 to release the contact state with the outer surface of the positioning panel 72, allowing the positioning panel 72 to slide inside the positioning track 71 and be stretched towards the turning tool, positioned directly above the turning tool in the lifting frame 426. Then, using the bottom of the positioning panel 72 as the positioning height, the height of the turning tool in the lifting frame 426 is adjusted by rotating the drive shaft 411. When the turning tool contacts the bottom of the positioning panel 72, the drive shaft 411 is locked by rotating the two hexagonal nuts 414 to abut against both sides of the fixed bracket 413. Finally, the positioning panel 72 is pushed back to its original position and locked by the positioning knob 73. This device achieves the desired effect through the cooperation of the positioning mechanism 7 and the lifting assembly 42.

[0032] In a further preferred embodiment of the present invention, a limiting clip 74 is provided above the positioning panel 72, and the limiting clip 74 is elastic; When the workpiece needs to be sprayed with coolant during turning, the coolant spray pipe can be placed in the limit clamp 74 and the position knob 73 can be rotated to release the contact state with the outer surface of the positioning panel 72, so that the positioning panel 72 slides inside the positioning track 71, thereby moving the position of the positioning panel 72, which in turn moves the coolant spray pipe to the appropriate position for spraying coolant. In traditional coolant spraying processes, the coolant is sprayed directly onto the workpiece. However, since the workpiece is rotating at high speed, the coolant is flung out by the workpiece's high speed, reducing the cooling effect and polluting the environment. Another purpose of coolant spraying is to reduce the random flying of machining dust. Traditionally, coolant is sprayed continuously until the workpiece is finished to achieve optimal cooling and dust reduction. However, this method is costly and creates a messy machining environment on the CNC machine tool. This device inserts the coolant spray pipe into the limiting clamp 74, and positions the spray pipe head towards the two auxiliary rollers 64, as per [reference needed]. Figure 10 and 14As shown, when the workpiece rotates at high speed, the coolant is sprayed between the two auxiliary rollers 64 and the workpiece. The rotation of the workpiece is opposite to the rotation of the two auxiliary rollers 64, which reduces the amount of coolant splashed out. At the same time, after the coolant flows into the two auxiliary rollers 64, it is evenly transferred to the workpiece through the rotation of the auxiliary rollers 64. When the coolant is thrown upward, the two auxiliary rollers 64 can also block it and throw it onto the two auxiliary rollers 64. It is then transferred to the workpiece through the rotation of the auxiliary rollers 64. This allows the limiting clamp 74 of the positioning mechanism 7 to fix the coolant spray pipe. By moving the positioning panel 72 within the positioning track 71, the nozzle is adjusted to be near the contact area between the auxiliary rollers 64 and the workpiece. By utilizing the entrapment effect of the auxiliary rollers 64 rotating in the opposite direction to the workpiece, the coolant is sprayed in a directional, slow-flowing, and uniform manner, reducing splashing waste and improving the cooling and dust suppression effect.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A numerical control tool holder for a numerical control machine tool, comprising a numerical control machine tool (1), characterized in that, Also includes CNC tool post (2): Position adjustment mechanism (3) for changing the position of turning tool; (4) A spindle adjustment mechanism for calibrating the height of turning tools. Auxiliary force-boosting mechanism (5) used for buffering and distance compensation during operation of auxiliary turning mechanism (6); (6) An auxiliary turning mechanism used to conform to the object and stabilize the turning operation during the turning process. Positioning mechanism (7) for calibrating the height of turning tools. The CNC machine tool (1) is placed on the ground. The CNC machine tool (1) is provided with a cross slide (11). The cross slide (11) is composed of a transverse feed device and a longitudinal feed device. The longitudinal feed device is located on the transverse feed device. The CNC tool post (2) is set on the longitudinal feed device. The CNC tool post (2) is provided with four slides (22). The position adjustment mechanism (3) is provided with four slides. The four position adjustment mechanisms (3) are respectively set in the corresponding slides (22) on the CNC tool post (2). The axis adjustment mechanism (4) is provided with four slides. The four axis adjustment mechanisms (4) are set on the corresponding position adjustment mechanisms (3). The auxiliary force boosting mechanism (5) is set on the side of the transverse feed device. The auxiliary turning mechanism (6) is set on the auxiliary force boosting mechanism (5). The positioning mechanism (7) is set on the auxiliary force boosting mechanism (5).

2. The numerical control tool rest for a numerical control machine tool according to claim 1, wherein Each of the four position adjustment mechanisms (3) includes a main board (31), a slave board (32), a position adjustment knob (33), and a first bolt (34). There are two first bolts (34). The main board (31) and the slave board (32) are connected by two first bolts (34) to form a whole. They are both located in the slide groove (22) of the CNC tool holder (2) and are slidably fitted. The upper interior of the main board (31) and the slave board (32) are hollow. There are two position adjustment knobs (33). The two position adjustment knobs (33) are symmetrically arranged. The ends of the two position adjustment knobs (33) pass through the outer side of the CNC tool holder (2) to the corresponding slide groove (22) and abut against the outer surface of the slave board (32). The two position adjustment knobs (33) are threadedly connected to the CNC tool holder (2).

3. The numerical control tool rest for a numerical control machine tool according to claim 2, wherein Each of the four shaft adjustment mechanisms (4) includes a drive assembly (41) and a lifting assembly (42). The drive assembly (41) is mounted on the corresponding slave plate (32). The lifting assembly (42) is connected to the drive assembly (41) by transmission and is located on the main plate (31). The drive assembly (41) includes a drive shaft (411), a drive helical gear (412), a fixed bracket (413), and a hexagonal nut (414). The drive shaft (411) is rotatably connected to the corresponding slave plate (32), and the end of the drive shaft (411) is located in the hollow part of the upper part of the corresponding slave plate (32). The drive helical gear... The wheel (412) is located at the end of the drive shaft (411), the fixed bracket (413) is located on the outside of the plate (32), the drive shaft (411) has an external thread in the middle, the middle of the drive shaft (411) passes through the fixed bracket (413) and does not contact the fixed bracket (413), there are two hexagonal nuts (414), the two hexagonal nuts (414) are symmetrically sleeved on the middle of the drive shaft (411) and the two hexagonal nuts (414) are located on both sides of the fixed bracket (413), and the two hexagonal nuts (414) are threaded to the middle of the drive shaft (411).

4. The numerical control tool rest for a numerical control machine tool according to claim 3, wherein The lifting assembly (42) includes a lifting helical gear (421), a lifting shaft (422), a sprocket (423), a chain (424), a lifting frame (425), and a lifting frame (426). There are three lifting shafts (422), which are equidistantly arranged on their respective main plates (31), with the lower ends of each shaft vertically penetrating the upper hollow portion of the main plate (31). All three shafts (422) are threadedly connected to the main plate (31). There are also three sprockets (423), each located on a corresponding lifting shaft. (422) At the lower end, the chain (424) is connected to three sprockets (423) and meshes with each other. The lifting helical gear (421) is located below the corresponding sprocket (423). The lifting helical gear (421) meshes with the driving helical gear (412). There are three lifting frames (425). The middle part of the three lifting frames (425) is respectively sleeved on the corresponding lifting shaft (422) and is threaded. The lower ends of the three lifting frames (425) are respectively slidably connected to the main board (31). The lifting frame (426) is located at the upper end of the three lifting frames (425).

5. The numerical control tool rest for a numerical control machine tool according to claim 4, wherein The lifting frame (426) is provided with a knife placement groove (427) inside, and the knife placement groove (427) is provided with anti-slip texture.

6. The numerical control tool rest for a numerical control machine tool according to claim 1, wherein The auxiliary force-boosting mechanism (5) includes a moving component (51) and a force-boosting component (52). The moving component (51) is disposed on the side of the transverse feed device, and the force-boosting component (52) is disposed on the moving component (51). The moving component (51) includes a moving track (511), a moving bolt (512), a moving frame (513), and a moving hydraulic cylinder (514). There are several moving bolts (512). The moving track (511) is connected to the side of the cross slide (11) through the corresponding moving bolts (512). The moving frame (513) is disposed on the outer side of the moving track (511), and the moving hydraulic cylinder (514) is disposed on the moving frame (513).

7. A numerical control tool holder for a numerical control machine tool according to claim 6, characterized in that The force-enhancing component (52) includes a first force-enhancing frame (521), a second force-enhancing frame (522), and a spring (523). The first force-enhancing frame (521) is connected to the output end of the movable hydraulic cylinder (514) on its side. The first force-enhancing frame (521) and the second force-enhancing frame (522) are respectively slidably located in the movable track (511). The first force-enhancing frame (521) and the second force-enhancing frame (522) are slidably fitted together. There are two springs (523), which are symmetrically arranged. The first force-enhancing frame (521) and the second force-enhancing frame (522) are connected by the two springs (523).

8. The numerical control tool rest for a numerical control machine tool according to claim 7, wherein The auxiliary turning mechanism (6) includes an auxiliary block (61), an upper connecting rod (62), a lower connecting rod (63), an auxiliary roller (64), and an auxiliary knob (65). The second booster frame (522) has an auxiliary groove (66) on its side facing the CNC tool holder (2). There are two auxiliary blocks (61), which are symmetrically arranged in the auxiliary groove (66) and are both slidably fitted. The upper connecting rod (62) is inclined upward and the lower connecting rod (63) is inclined downward, so that the two auxiliary rollers... The wheels (64) are staggered in the vertical direction to form a two-point support or clamping fit on the surface of the workpiece. There are two auxiliary rollers (64), which are rotatably connected to the front ends of the upper connecting rod (62) and the lower connecting rod (63), respectively. There are two auxiliary knobs (65), whose ends penetrate into the auxiliary groove (66) and abut against the surface of the corresponding auxiliary block (61). Both auxiliary knobs (65) are threadedly connected to the second force-increasing frame (522).

9. The numerical control tool rest for a numerical control machine tool according to claim 8, wherein The positioning mechanism (7) includes a positioning rail (71), a positioning panel (72), and a positioning knob (73). The positioning rail (71) is located on the side of the second force-enhancing frame (522). The positioning panel (72) is slidably disposed inside the positioning rail (71). The positioning knob (73) extends through the positioning rail (71) and abuts against the outer surface of the positioning panel (72). The bottom height of the positioning panel (72) is consistent with the height of the turning tool after calibration. The height of the turning tool is consistent with the axis height of the three-jaw chuck. The positioning panel (72) is located directly above the lifting frame (426).

10. A CNC tool post for a CNC machine tool according to claim 9, characterized in that, The positioning panel (72) is provided with a limiting clip (74) above it, and the limiting clip (74) is elastic.

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