A deep hole turning follow-up feed guide head

Abstract

The application discloses a deep hole turning follow-up feeding guide tool rest and relates to the field of lathe tool rests. The deep hole turning follow-up feeding guide tool rest comprises a tool bar support, a tool bar assembly and a supporting assembly. The tool bar assembly comprises a supporting tool bar, an intermediate tool bar, a front tool bar and a tool rest body. The supporting assembly comprises a mounting sleeve and a locking mechanism. The locking mechanism comprises a plurality of wedge blocks. The nested design between the intermediate tool bar and the front tool bar can adapt to the machining of inner holes with different depths. The nested mode effectively shortens the length of the tool bar when the intermediate tool bar and the front tool bar are used to turn shallow inner holes, and reduces the tool jumping during turning. The locking mechanism locks and limits the inner wall of the end part of the workpiece inner hole through the wedge blocks. The plurality of wedge blocks arranged uniformly in the circumferential direction can expand in the radial direction and adapt to workpiece inner holes with different diameters, so that the locking mechanism supports the front tool bar, effectively suppresses the cutting vibration of the front tool bar and reduces the tool jumping of the turning tool.

Description

Technical Field

[0001] This invention relates to the field of lathe tool post technology, specifically to a guide tool post for deep internal hole turning with follow-up feed. Background Technology

[0002] Existing lathes are limited by machine tool design and strength, making it difficult to machine ultra-long and large-diameter holes. Even with carbide tool holders and vibration damping devices, it's difficult to improve the machine tool's ability to machine long and large holes, and it's also difficult to guarantee machining geometric accuracy. This is particularly true for the surface finish of the parts, negatively impacting the machine tool's accuracy and lifespan. Furthermore, long tool holders are prone to tool skipping during turning. Additionally, after turning the outer diameter, machining the inner hole requires additional machine tools, resulting in secondary workpiece clamping, making it difficult to guarantee the coaxiality of the inner and outer diameters, and increasing equipment investment. Summary of the Invention

[0003] The purpose of this invention is to provide a deep internal hole turning follow-up feed guide tool post to overcome the above-mentioned shortcomings in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A deep internal turning follow-feed guide tool post includes a tool holder support and further includes: A tool holder assembly is disposed within the tool holder support. The tool holder assembly includes a supporting tool holder, an intermediate tool holder is disposed at one end of the supporting tool holder via a flange, a front tool holder is slidably disposed on the inner side of the intermediate tool holder, and a tool holder body is disposed at the end of the front tool holder away from the intermediate tool holder via a flange. The tool holder body is used to fix a turning tool. A support assembly is provided at one end of the front tool holder near the tool post body. The support assembly includes a mounting sleeve, which is slidably disposed on the outer side of the front tool holder. A locking mechanism is provided on the outer side of the mounting sleeve. The locking mechanism includes a plurality of wedge blocks, which are evenly arranged around the circumference of the mounting sleeve. The locking mechanism can be fixed to the inner end of the workpiece's inner hole by means of the wedge blocks.

[0005] As described above, the tool holder support includes a fixed base, and a detachable upper seat is provided on the upper end of the fixed base by means of a threaded connection. A semi-circular groove is provided on the opposite end of the fixed base and the detachable upper seat. A limit block is provided in the semi-circular groove of the fixed base, and a limit groove is provided on the tool holder support. The limit block is engaged in the limit groove.

[0006] The aforementioned tool holder assembly further includes an adjusting spring, which is disposed between the intermediate tool holder and the front tool holder. A baffle is slidably disposed at the end of the intermediate tool holder away from the tool holder body. A rack is disposed at the end of the baffle away from the adjusting spring. A gear shaft is rotatably disposed inside the intermediate tool holder, and the gear shaft meshes with the rack. A worm gear is disposed on the gear shaft, and a worm is meshed on one side of the worm gear. The worm is rotatably disposed inside the intermediate tool holder, and one end of the worm is provided with an internal hexagonal groove.

[0007] As described above, the front end of the tool holder body is provided with a mounting groove, and the front end of the tool holder body is provided with three locking bolts by means of thread engagement. The locking bolts are located directly above the mounting groove, and a mesh surface is provided directly below the mounting groove.

[0008] As described above, the tool holder body also includes a cylindrical shock-absorbing space, in which a lead rod is slidably arranged, and two sealing rings are symmetrically arranged on the outer side of the lead rod. A buffer spring is provided at the end of the shock-absorbing space away from the mounting groove.

[0009] The locking mechanism further includes a ramp, the wedge block is slidably disposed on the ramp, and a pressing block is provided at the end of the mounting sleeve away from the ramp by means of a threaded engagement, the pressing block being in contact with the side of the wedge block.

[0010] As described above, a rectangular groove is provided on the side of the wedge block away from the mounting sleeve, the outer side of the wedge block is made of elastic material, and the outer side of the wedge block is an anti-slip surface.

[0011] The above also includes multiple traveling brackets, each traveling bracket including a limiting ring disposed on the outside of the front tool bar. A support plate is disposed at the lower end of the limiting ring, and a slider is disposed at the lower end of the support plate. The slider is disposed on the outside of the slide rail in a sliding manner, and the slide rail is disposed at the upper end of the lathe.

[0012] In the above technical solution, the beneficial effects of the present invention are as follows: 1. The present invention, through the nested design between the intermediate tool holder and the front tool holder, can adapt to the machining of internal holes of different depths, and achieves rapid positioning through sliding adjustment. The nested design effectively shortens the length of the tool holder when turning shallow internal holes, thereby reducing the occurrence of tool jump during turning. 2. The locking mechanism of the present invention locks and limits the workpiece inner hole end to the inner wall by means of wedge blocks, and multiple wedge blocks evenly arranged along the circumference of the mounting sleeve can expand radially to adapt to workpiece inner holes of different diameters, so that the wedge blocks and the mounting sleeve can support and limit the front tool bar, so that the front tool bar can effectively suppress cutting vibration and reduce the occurrence of tool jump. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 A three-dimensional structural schematic diagram of a deep internal hole turning tool holder provided in an embodiment of the present invention; Figure 2 A top view of a deep internal hole turning tool holder provided in another embodiment of the present invention; Figure 3 Provided for another embodiment of the present invention Figure 2 Sectional view at point AA; Figure 4 Provided for another embodiment of the present invention Figure 3 A magnified view of a portion of point M; Figure 5 Provided for another embodiment of the present invention Figure 3 A magnified view of N points; Figure 6 Provided for another embodiment of the present invention Figure 3 A magnified view of a portion of point S.

[0015] Explanation of reference numerals in the attached figures: 1. Tool holder support; 10. Fixed base; 11. Detachable upper seat; 12. Limiting block; 2. Tool holder assembly; 20. Support tool holder; 21. Intermediate tool holder; 22. Front tool holder; 23. Tool holder body; 230. Mounting slot; 231. Locking bolt; 232. Vibration damping space; 233. Lead rod; 234. Sealing ring; 235. Buffer spring; 24. Adjusting spring; 25. Baffle; 26. Rack; 27. Gear shaft; 28. Worm gear; 29. ​​Worm; 3. Support assembly; 30. Mounting sleeve; 31. Locking mechanism; 310. Wedge block; 311. Ramp; 312. Extrusion block; 4. Traveling bracket; 40. Limiting ring; 41. Support plate. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0017] In the description of this invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "side", "inner", "outer", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] like Figures 1-6 As shown in the figure, an embodiment of the present invention provides a deep internal hole turning follow-up feed guide tool holder, including a tool holder support 1, and further comprising: Tool holder assembly 2 is disposed in tool holder support 1. Tool holder assembly 2 includes a supporting tool holder 20. One end of the supporting tool holder 20 is provided with an intermediate tool holder 21 through a flange. A front tool holder 22 is slidably disposed on the inner side of the intermediate tool holder 21. The end of the front tool holder 22 away from the intermediate tool holder 21 is provided with a tool holder body 23 through a flange. The tool holder body 23 is used to fix the turning tool. Support assembly 3 is located at one end of the front tool holder 22 near the tool post body 23. Support assembly 3 includes mounting sleeve 30. Mounting sleeve 30 is slidably provided on the outer side of front tool holder 22. Locking mechanism 31 is provided on the outer side of mounting sleeve 30. Locking mechanism 31 includes multiple wedge blocks 310. The wedge blocks 310 are evenly arranged around the circumference of mounting sleeve 30. Locking mechanism 31 can be fixed to the inner end of the inner hole of workpiece through wedge blocks 310.

[0019] In another embodiment of the present invention, the tool holder support 1 includes a fixed base 10, which is disposed on the slide of the lathe. A detachable upper seat 11 is provided on the upper end of the fixed base 10 by means of a threaded connection. A semi-circular groove is provided on the opposite end of the fixed base 10 and the detachable upper seat 11. A limit block 12 is provided in the semi-circular groove of the fixed base 10. A limit groove is provided on the tool holder 20, and the limit block 12 is engaged in the limit groove. The specific implementation method is as follows: the semi-circular grooves on the fixed base 10 and the detachable upper base 11 can be combined to form a complete circle. Therefore, before using the accompanying tool holder, the detachable upper base 11 is first removed from the fixed base 10. Then, the support tool rod 20 is placed in the semi-circular groove of the fixed base 10, and the limiting block 12 in the semi-circular groove of the fixed base 10 is engaged with the limiting groove on the support tool rod 20. At this time, the detachable upper base 11 is reinstalled on the upper end of the fixed base 10, so that the detachable upper base 11 and the fixed base 10 clamp and fix the support tool rod 20, and the limiting block 12 restricts the rotation of the support tool rod 20 between the detachable upper base 11 and the fixed base 10 while preventing axial movement of the support tool rod 20. After the support tool rod 20 is installed and fixed, it is secured by flanges and bolts. The intermediate tool holder 21, the front tool holder 22, and the tool holder body 23 are installed sequentially, and the cutting tool is fixed on the tool holder body 23. When the lathe rotates the workpiece with the inner hole, the cutting tool is supported by the support tool holder 20, the intermediate tool holder 21, the front tool holder 22, and the tool holder body 23 to enter the inner hole of the workpiece for turning. The locking mechanism 31 is locked and fixed to the end of the inner hole of the workpiece by the wedge block 310, so that the locking mechanism 31 supports and limits the front tool holder 22 through the mounting sleeve 30, so as to avoid the cutting tool jumping (the tool jumping is a tool vibration phenomenon caused by cutting force or clamping problems during turning, which is common when the workpiece is thin, the tool is too long, or the clamping is not tight, accompanied by a buzzing sound) when the cutting tool is cutting.

[0020] In another embodiment of the present invention, the tool holder assembly 2 further includes an adjusting spring 24, which is disposed between the intermediate tool holder 21 and the front tool holder 22. A baffle 25 is slidably disposed at the end of the intermediate tool holder 21 away from the tool holder body 23. A rack 26 is disposed at the end of the baffle 25 away from the adjusting spring 24. A gear shaft 27 is rotatably disposed inside the intermediate tool holder 21. The gear shaft 27 meshes with the rack 26. A worm gear 28 is disposed on the gear shaft 27. A worm 29 is meshed on one side of the worm gear 28. The worm 29 is rotatably disposed inside the intermediate tool holder 21, and an internal hexagonal groove is provided at one end of the worm 29. The specific implementation method is as follows: When the traveling tool post is in use, the slide on the lathe drives the cutting tool to move closer to the workpiece via the support tool bar 20, intermediate tool bar 21, front tool bar 22, and tool post body 23. This causes the locking mechanism 31 to approach the inner hole of the workpiece, and the cutting tool to press against the inner wall of the workpiece's inner hole. At this time, the lathe is started, and the cutting tool turns and enlarges the inner hole of the workpiece. After turning and enlarging a short distance, the lathe is stopped. At this time, the locking mechanism 31 is moved by the mounting sleeve 30, causing the wedge block 310 to enter the inner hole of the workpiece. The wedge block 310 is adjusted to move and deform outside the mounting sleeve 30 so that the outer side of the wedge block 310 fits against the inner wall of the already turned inner hole of the workpiece. The locking mechanism 31 supports and limits the tool post body 23 and the cutting tool through the front tool bar 22, so as to limit the runout of the cutting tool during the turning process; and the cutting tool presses against the inner wall of the workpiece's inner hole. When machining the inner wall of the workpiece's inner hole, the front tool holder 22 presses the adjusting spring 24 and slides along the intermediate tool holder 21. Thus, when the cutting tool is machining the inner hole of the workpiece, the adjusting spring 24 can reset and drive the front tool holder 22 to move in the opposite direction along the intermediate tool holder 21, so that the front tool holder 22 can drive the cutting tool to follow through the tool holder body 23, facilitating the cutting tool feed to continuously machine the inner hole of the workpiece. In addition, by inserting an Allen wrench into the Allen groove at the end of the worm gear 29, the Allen wrench drives the worm gear 29 to rotate, so that the worm gear 29 drives the worm wheel 28 that meshes with it to rotate, so that the worm wheel 28 drives the gear shaft 27 to rotate, so that the gear shaft 27 drives the rack 26 that meshes with it to move. Thus, the rack 26 can drive the baffle 25 connected to it to move along the inner side of the intermediate tool holder 21, so that the baffle 25 adjusts the preload of the adjusting spring 24.

[0021] In another embodiment of the present invention, the front end of the tool holder body 23 is provided with a mounting groove 230, and the front end of the tool holder body 23 is provided with three locking bolts 231 by means of thread engagement. The locking bolts 231 are located directly above the mounting groove 230, and a mesh surface is provided directly below the mounting groove 230. The specific implementation method is as follows: Before using the accompanying tool holder, the cutting tool is placed in the mounting groove 230 at the front end of the tool holder body 23. After the tool is placed, the cutting tool is locked and fixed in the mounting groove 230 by three locking bolts 231. At the same time, the grid surface directly below the mounting groove 230 can increase the friction between the cutting tool and the tool holder body 23, so as to reduce or even avoid the cutting tool from loosening and jumping due to tool jumping during the turning process.

[0022] In another embodiment of the present invention, the tool holder body 23 further includes a cylindrical shock-absorbing space 232, in which a lead rod 233 is slidably arranged, and two sealing rings 234 are symmetrically arranged on the outside of the lead rod 233. A buffer spring 235 is arranged at the end of the shock-absorbing space 232 away from the mounting groove 230. The specific implementation method is as follows: When the support tool holder 20, intermediate tool holder 21, front tool holder 22 and tool holder body 23 drive the cutting tool into the inner hole of the workpiece for turning, the cutting tool will vibrate during the turning process. The vibration generated by the cutting tool is transmitted to the damping space 232, so that the vibration generated by cutting is transmitted to the lead rod 233. As a result, the lead rod 233 drives the sealing ring 234 to slide in the damping space 232. At the same time, when the lead rod 233 slides, it can compress the buffer spring 235, so that the buffer spring 235 absorbs the vibration and pushes the lead rod 233 to move in the opposite direction in the damping space 232. In this way, the vibration generated by the cutting tool can be gradually absorbed by the movement of the lead rod 233 and the compression and recovery of the buffer spring 235, avoiding the vibration from being transmitted to the support tool holder 20, intermediate tool holder 21 or front tool holder 22, and avoiding the cutting tool from jumping due to vibration.

[0023] In another embodiment of the present invention, the locking mechanism 31 further includes a ramp 311, the wedge block 310 is slidably disposed on the ramp 311, and the end of the mounting sleeve 30 away from the ramp 311 is provided with a pressing block 312 by means of thread engagement, the pressing block 312 being in contact with the side of the wedge block 310. The specific implementation method is as follows: The slide on the lathe drives the cutting tool to move closer to the workpiece via the support tool holder 20, intermediate tool holder 21, front tool holder 22, and tool post body 23. This causes the locking mechanism 31 to approach the inner hole of the workpiece, and the cutting tool to press against the inner wall of the workpiece's inner hole. At this time, the lathe is started, causing the cutting tool to turn and enlarge the inner hole of the workpiece. After turning and enlarging a short distance, the lathe is stopped. At this time, the mounting sleeve 30 drives the locking mechanism 31 to move, causing the wedge block 310 to enter the inner hole of the workpiece. By rotating the pressing block 312, the pressing block 312 moves along the mounting sleeve 30 through the thread, thereby... The pressing block 312 is moved away from or close to the wedge block 310 so that the pressing block 312 drives the wedge block 310 to slide along the ramp 311 and the outer side of the wedge block 310 fits against the inner wall of the workpiece after the inner hole is machined and enlarged. The wedge block 310 locks and restricts the mounting sleeve 30 at the end of the inner hole of the workpiece so that the front tool holder 22 can move axially along the mounting sleeve 30 when the turning tool is turning. In addition, when the mounting sleeve 30 and the wedge block 310 support the front tool holder 22, the vibration amplitude of the front tool holder 22 during turning can be reduced, and the excessive amplitude can be reduced or even avoided, which may cause the turning tool to jump during turning.

[0024] In another embodiment of the present invention, a rectangular groove is provided on the side of the wedge block 310 away from the mounting sleeve 30, the outer side of the wedge block 310 is made of elastic material, and the outer side of the wedge block 310 is an anti-slip surface. The specific implementation method is as follows: The rectangular groove allows the elastic material on the outer side of the wedge block 310 to have room for deformation, which facilitates the smooth deformation of the elastic material on the outer side of the wedge block 310 to adapt to the size of the inner hole of the workpiece. The anti-slip surface on the outer side of the wedge block 310 can increase the friction between the wedge block 310 and the inner hole of the workpiece, and prevent the wedge block 310 from separating from the inner hole of the workpiece due to the vibration generated by the turning tool when the wedge block 310 and the mounting sleeve 30 support and limit the front tool holder 22.

[0025] Furthermore, the wedge blocks 310 are identical in shape and size, and the ramp 311 is a ring structure with its radial dimension changing uniformly from one end to the other. In this way, the extrusion block 312 can adjust the wedge blocks 310 to move synchronously along the ramp 311, so that the outer side of the wedge blocks 310 can synchronously contact or move away from the inner wall of the workpiece's inner hole. The elastic material on the outer side of the wedge blocks 310 can deform to ensure the coaxiality of the workpiece's inner hole and outer circle when the workpiece's outer cylindrical surface is machined.

[0026] In another embodiment of the present invention, a plurality of accompanying supports 4 are also included. Each accompanying support 4 includes a limiting ring 40, which is disposed on the outside of the front tool bar 22. A support plate 41 is disposed at the lower end of the limiting ring 40, and a slider is disposed at the lower end of the support plate 41. The slider is disposed on the outside of the slide rail in a sliding manner, and the slide rail is disposed at the upper end of the lathe. The specific implementation is as follows: When the front tool holder 22 slides along the middle tool holder 21, if the total length of the two is too long, the vibration generated during the turning process is very likely to cause jumping. The vibration of the middle tool holder 21 and the front tool holder 22 will also have a reaction effect on the tool holder body 23 and the turning tool, causing the turning tool to jump during turning. Therefore, multiple traveling brackets 4 are set on the front tool holder 22 to move and support it, reducing or even avoiding the vibration of the front tool holder 22 during the turning tool cutting. Specifically, when the front tool holder 22 moves along the middle tool holder 21, the front tool holder 22 can drive the support plate 41 to move synchronously through the limiting ring 40, so that the lower end of the support plate 41 moves along the slide rail through the slider, thereby allowing the slider, slide rail and support plate 41 to support and limit the front tool holder 22 through the limiting ring 40, reducing the vibration of the front tool holder 22 during the turning tool cutting.

[0027] Working principle: The semicircular grooves on the fixed base 10 and the detachable upper base 11 can be combined to form a complete circle. Before using the traveling tool post, the detachable upper base 11 is first removed from the fixed base 10. Then, the support tool shank 20 is placed in the semicircular groove of the fixed base 10, and the limiting block 12 in the semicircular groove of the fixed base 10 is engaged with the limiting groove on the support tool shank 20. At this time, the detachable upper base 11 is reinstalled on the upper end of the fixed base 10, so that the detachable upper base 11 and the fixed base 10 clamp and fix the support tool shank 20, and the limiting block 12 restricts the rotation of the support tool shank 20 between the detachable upper base 11 and the fixed base 10 while preventing axial movement of the support tool shank 20. After the support tool shank 20 is installed and fixed, the intermediate tool shank 21, the front tool shank 22, and the tool post body 23 are installed sequentially using flanges and bolts. Simultaneously, the cutting tool is fixed to the tool post body 23. Thus, when the lathe rotates the workpiece with the inner hole, the support tool shank 20 and the intermediate tool shank 21 are used to clamp and fix the support tool shank 20. The tool holder 21, the front tool holder 22, and the tool post body 23 support the turning tool as it enters the inner hole of the workpiece for turning. The locking mechanism 31 is locked and fixed to the end of the inner hole of the workpiece by a wedge block 310. This locking mechanism 31, through the mounting sleeve 30, supports and limits the front tool holder 22, preventing tool jumps (tool jumps are a vibration phenomenon caused by cutting force or clamping problems during turning) caused by excessive length of the supporting tool holder 20, intermediate tool holder 21, and front tool holder 22 during the turning process. This phenomenon is commonly seen when the workpiece is thin, the tool is too long, or the clamping is not tight, accompanied by a buzzing sound. Before using the accompanying tool holder, the cutting tool is placed in the mounting groove 230 at the front end of the tool holder body 23. After the tool is placed, the cutting tool is locked and fixed in the mounting groove 230 by three locking bolts 231. At the same time, the grid surface directly below the mounting groove 230 can increase the friction between the cutting tool and the tool holder body 23, so as to reduce or even avoid the cutting tool from becoming loose and causing tool jump during the turning process. When the traveling tool post is in use, the slide on the lathe, through the support tool holder 20, intermediate tool holder 21, front tool holder 22, and tool post body 23, moves the cutting tool closer to the workpiece, causing the locking mechanism 31 to approach the inner hole of the workpiece, and causing the cutting tool to press against the inner wall of the workpiece's inner hole. At this time, the lathe is started, causing the cutting tool to turn and enlarge the inner hole of the workpiece. After turning and enlarging a short distance, the lathe is stopped. At this time, the mounting sleeve 30 drives the locking mechanism 31 to move, causing the wedge block 310 to enter the inner hole of the workpiece. The wedge block 310 is adjusted to move and deform outside the mounting sleeve 30 so that the outer side of the wedge block 310 fits against the inner wall of the already turned inner hole of the workpiece. The locking mechanism 31, through the front tool holder 22, supports and limits the tool post body 23 and the cutting tool to limit the runout of the cutting tool during the turning process; and the cutting tool presses against the inner hole of the workpiece. When machining the inner wall, the front tool holder 22 compresses the adjusting spring 24 and slides along the intermediate tool holder 21. Thus, when the cutting tool is machining the inner hole of the workpiece, the adjusting spring 24 can return to its original position and drive the front tool holder 22 to move in the opposite direction along the intermediate tool holder 21. This allows the front tool holder 22 to drive the cutting tool along the tool holder body 23, facilitating continuous cutting of the inner hole of the workpiece. In addition, by inserting an Allen wrench into the Allen groove at the end of the worm 29, the Allen wrench drives the worm 29 to rotate, causing the worm 29 to drive the worm wheel 28 meshing with it to rotate. This causes the worm wheel 28 to drive the gear shaft 27 to rotate, causing the gear shaft 27 to drive the rack 26 meshing with it to move. This allows the rack 26 to drive the baffle 25 connected to it to move along the inner side of the intermediate tool holder 21, thereby allowing the baffle 25 to adjust the preload of the adjusting spring 24. When the support tool holder 20, intermediate tool holder 21, front tool holder 22, and tool holder body 23 drive the cutting tool into the inner hole of the workpiece for turning, the cutting tool will vibrate during the turning process. The vibration generated by the cutting tool is transmitted to the damping space 232, which in turn transmits the vibration generated by cutting to the lead rod 233. This causes the lead rod 233 to drive the sealing ring 234 to slide within the damping space 232. At the same time, when the lead rod 233 slides, it can compress the buffer spring 235, which absorbs the vibration and pushes the lead rod 233 to move in the opposite direction within the damping space 232. In this way, the vibration generated by the cutting tool can be gradually absorbed by the movement of the lead rod 233 and the compression and recovery of the buffer spring 235, preventing the vibration from being transmitted to the support tool holder 20, intermediate tool holder 21, or front tool holder 22, and preventing the cutting tool from jumping due to vibration. The slide on the lathe, through the support tool holder 20, intermediate tool holder 21, front tool holder 22, and tool post body 23, moves the cutting tool closer to the workpiece, causing the locking mechanism 31 to approach the inner hole of the workpiece and press the cutting tool against the inner wall of the workpiece's inner hole. At this point, the lathe is started, allowing the cutting tool to machine and enlarge the inner hole of the workpiece. After machining and enlarging a short distance, the lathe is stopped. Then, the mounting sleeve 30 moves the locking mechanism 31, causing the wedge block 310 to enter the inner hole of the workpiece. Furthermore, by rotating the pressing block 312, the pressing block 312... By moving along the mounting sleeve 30 via the thread, the pressing block 312 moves away from or closer to the wedge block 310, so that the pressing block 312 drives the wedge block 310 to slide along the ramp 311 and so that the outer side of the wedge block 310 fits against the inner wall of the workpiece's inner hole after it has been machined and enlarged. This allows the wedge block 310 to lock and restrict the mounting sleeve 30 at the end of the workpiece's inner hole, so that the front tool holder 22 can move axially along the mounting sleeve 30 during turning. In addition, when the mounting sleeve 30 and the wedge block 310 support the front tool holder 22, they can reduce the cutting tool's movement. The vibration amplitude of the front tool holder 22 during turning is reduced or even avoided, as excessive amplitude can cause tool jumps during turning. Furthermore, the rectangular groove provides space for the elastic material on the outer side of the wedge block 310 to deform, facilitating its smooth deformation to adapt to the dimensions of the workpiece's inner hole. The anti-slip surface on the outer side of the wedge block 310 increases friction between the wedge block 310 and the workpiece's inner hole, preventing vibrations caused by the turning tool from causing tool jumps when the wedge block 310 and the mounting sleeve 30 support and limit the front tool holder 22. In the case of separation between the wedge block 310 and the inner hole of the workpiece; furthermore, the wedge blocks 310 are identical in shape and size, and the ramp 311 is an annular structure with its radial dimension changing uniformly from one end to the other. Thus, the pressing block 312 can adjust the wedge blocks 310 to move synchronously along the ramp 311 so that the outer side of the wedge blocks 310 can synchronously contact or move away from the inner wall of the inner hole of the workpiece. The elastic material on the outer side of the wedge blocks 310 can deform to ensure the coaxiality of the inner hole and the outer circle of the workpiece when the outer circle surface of the workpiece is machined. When the front tool holder 22 slides along the intermediate tool holder 21, if the total length of the two is too long, the vibration generated during the cutting process of the lathe tool can easily cause jumping. The vibration of the intermediate tool holder 21 and the front tool holder 22 will then act on the tool holder body 23 and the lathe tool, causing the lathe tool to jump during cutting. Therefore, multiple traveling brackets 4 are set on the front tool holder 22 to move and support it, reducing or even avoiding the vibration of the front tool holder 22 during cutting. Specifically, when the front tool holder 22 moves along the intermediate tool holder 21, the front tool holder 22 can drive the support plate 41 to move synchronously through the limiting ring 40, so that the lower end of the support plate 41 moves along the slide rail through the slider. Thus, the slider, the slide rail and the support plate 41 support and limit the front tool holder 22 through the limiting ring 40, reducing the vibration of the front tool holder 22 during cutting.

[0028] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A deep internal hole turning follow-feed guide tool holder, comprising a tool holder support (1), characterized in that, Also includes: Tool holder assembly (2), the tool holder assembly (2) is disposed in the tool holder support (1), the tool holder assembly (2) includes a supporting tool holder (20), one end of the supporting tool holder (20) is provided with an intermediate tool holder (21) through a flange, the inner side of the intermediate tool holder (21) is provided with a front tool holder (22) in a sliding manner, the end of the front tool holder (22) away from the intermediate tool holder (21) is provided with a tool holder body (23) through a flange, the tool holder body (23) is used to fix the turning tool; A support assembly (3) is provided at one end of the front tool holder (22) near the tool post body (23). The support assembly (3) includes a mounting sleeve (30). The mounting sleeve (30) is slidably provided on the outer side of the front tool holder (22). A locking mechanism (31) is provided on the outer side of the mounting sleeve (30). The locking mechanism (31) includes a plurality of wedge blocks (310). The wedge blocks (310) are evenly arranged around the mounting sleeve (30). The locking mechanism (31) can be fixed to the inner end of the workpiece hole through the wedge blocks (310).

2. The deep internal hole turning follow-up feed guide tool holder according to claim 1, characterized in that, The tool holder support (1) includes a fixed base (10). The upper end of the fixed base (10) is provided with a detachable upper seat (11) by means of threaded connection. The fixed base (10) and the detachable upper seat (11) are both provided with a semi-circular groove at their opposite ends. A limit block (12) is provided in the semi-circular groove of the fixed base (10). The tool holder (20) is provided with a limit groove. The limit block (12) is engaged in the limit groove.

3. The deep internal hole turning follow-up feed guide tool holder according to claim 1, characterized in that, The tool holder assembly (2) further includes an adjusting spring (24), which is disposed between the intermediate tool holder (21) and the front tool holder (22). A baffle (25) is slidably disposed at the end of the intermediate tool holder (21) away from the tool holder body (23). A rack (26) is disposed at the end of the baffle (25) away from the adjusting spring (24). A gear shaft (27) is rotatably disposed inside the intermediate tool holder (21). The gear shaft (27) meshes with the rack (26). A worm gear (28) is disposed on the gear shaft (27). A worm (29) meshes with one side of the worm gear (28). The worm (29) is rotatably disposed inside the intermediate tool holder (21), and an internal hexagonal groove is provided at one end of the worm (29).

4. The deep internal hole turning follow-up feed guide tool holder according to claim 1, characterized in that, The front end of the tool holder body (23) is provided with a mounting groove (230), and the front end of the tool holder body (23) is provided with three locking bolts (231) by means of thread engagement. The locking bolts (231) are located directly above the mounting groove (230), and a mesh surface is provided directly below the mounting groove (230).

5. A deep internal hole turning follow-up feed guide tool holder according to claim 4, characterized in that, The tool holder body (23) also includes a cylindrical shock-absorbing space (232), in which a lead rod (233) is slidably arranged, and two sealing rings (234) are symmetrically arranged on the outside of the lead rod (233). A buffer spring (235) is arranged at the end of the shock-absorbing space (232) away from the mounting groove (230).

6. The deep internal hole turning follow-up feed guide tool holder according to claim 1, characterized in that, The locking mechanism (31) also includes a ramp (311), the wedge block (310) is slidably disposed on the ramp (311), and the end of the mounting sleeve (30) away from the ramp (311) is provided with a pressing block (312) by means of thread engagement, the pressing block (312) is in contact with the side of the wedge block (310).

7. The deep internal hole turning follow-up feed guide tool holder according to claim 1, characterized in that, The wedge block (310) has a rectangular groove on the side away from the mounting sleeve (30), the outer side of the wedge block (310) is made of elastic material, and the outer side of the wedge block (310) is an anti-slip surface.

8. A deep internal hole turning follow-up feed guide tool holder according to claim 1, characterized in that, It also includes multiple traveling brackets (4), each traveling bracket (4) including a limiting ring (40), the limiting ring (40) being disposed on the outside of the front tool bar (22), the lower end of the limiting ring (40) being provided with a support plate (41), the lower end of the support plate (41) being provided with a slider, the slider being disposed on the outside of the slide rail in a sliding manner, the slide rail being disposed on the upper end of the lathe.

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