Longitudinal torsional composite vibration drill arbor

Abstract

The application provides a longitudinal-torsional composite vibration drill and reamer handle, which comprises a shell, a vibration generating mechanism arranged in the shell, and a handle assembly arranged on the vibration generating mechanism; the vibration generating mechanism comprises a rotating shaft arranged on the shell, a vibration generating part arranged on the rotating shaft, and a vibration output part threadedly connected with the rotating shaft; the vibration output part is connected with the vibration generating part and can rotate relative to the vibration generating part; the vibration output part can rotate with the rotating shaft, and the vibration generating part can drive the vibration output part to reciprocate along the axial direction of the rotating shaft with the rotation of the rotating shaft; the handle assembly comprises a first handle connected with the rotating shaft and a second handle arranged on the vibration output part; the first handle can receive external driving force to drive the rotating shaft to rotate, and the second handle is used for mounting a drill bit or a reamer. The longitudinal-torsional composite vibration drill and reamer handle can make cutting fluid fully enter a cutting area during drilling or reaming operation, and significantly enhance the lubrication and cooling effect of the cutting fluid.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of difficult-to-machine material machining technology, in particular to a longitudinal-torsional composite vibration drilling and reaming tool handle. BACKGROUND

[0002] At present, with the development of metallurgical industry and high-end equipment manufacturing, high-strength steel, stainless steel, titanium alloy, high-temperature alloy, composite materials and other various difficult-to-machine materials are increasingly widely used, which puts forward higher requirements for the machining capacity and level of the machining industry (enterprise).

[0003] In the prior art, the difficult-to-machine material has high strength and hardness, serious work hardening, and poor thermal conductivity, and there are problems of large cutting force, high cutting temperature and serious tool wear during machining, and there is a high risk of easy chipping, damage and even breakage, resulting in low tool life, poor machining surface roughness and low machining precision.

[0004] Vibration cutting machining technology is a relatively advanced cutting machining method, has good process effect, and plays an irreplaceable role in the machining of difficult-to-machine materials. Vibration cutting is divided into low-frequency vibration cutting and high-frequency vibration cutting according to the frequency. Among them, the mechanical low-frequency vibration cutting method has obvious advantages in the machining of difficult-to-machine material holes due to the characteristics of large vibrator power, easy motion control and low cost.

[0005] The existing low-frequency vibration drilling device usually superimposes an axial vibration on the basis of the uniform rotation of the drill bit, so that the relief surface of the drill bit can periodically separate from the machined surface during the machining process, so that the cutting fluid can enter the cutting zone, thereby reducing the cutting temperature and improving the service life of the drill bit. At the same time, the machining quality is improved by repeated cutting.

[0006] However, in the process of pure low-frequency axial vibration drilling, if the amplitude is less than the axial feed amount of the drilling, the cutting edge and the rake face of the drill bit are always in contact with the chip when the drill bit retreats along the axial direction. Even if the amplitude is greater than the feed amount, this contact exists most of the time. This contact hinders the entry of cutting fluid on the one hand, and increases the total friction path of the cutting edge and the rake face on the other hand, which is not conducive to reducing tool wear and to a certain extent affects the process effect of vibration drilling. In addition, if the vibration frequency is high, the axial movement speed of the tool during downward vibration is high, which may cause dynamic negative rake angle, which is not conducive to the tool. SUMMARY

[0007] Therefore, the present application aims to provide a longitudinal-torsional composite vibration drilling and reaming tool handle which can prolong the service life of the tool and improve the machining quality.

[0008] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0009] A longitudinal-torsional compound vibration drill arbor includes a housing, a vibration generating mechanism arranged in the housing, and an arbor assembly arranged on the vibration generating mechanism;

[0010] The vibration generating mechanism includes a rotating shaft arranged on the housing, a vibration generating part arranged on the rotating shaft, and a vibration output part threadedly connected with the rotating shaft, the vibration output part is connected with the vibration generating part and can rotate relative to the vibration generating part, and the vibration output part can rotate with the rotating shaft, and the vibration generating part can reciprocate along the axial direction of the rotating shaft to drive the vibration output part to reciprocate along the axial direction of the rotating shaft.

[0011] The arbor assembly includes a first arbor connected with the rotating shaft and a second arbor arranged on the vibration output part, the first arbor can receive external driving force to drive the rotating shaft to rotate, and the second arbor is used for mounting a drill bit or a reamer.

[0012] Further, the vibration generating part includes a vibration disc slidingly arranged on the rotating shaft and a vibration driving assembly arranged in the housing, and the vibration driving assembly is sleeved on the rotating shaft; the vibration disc can rotate with the rotating shaft, and the vibration disc can reciprocate along the axial direction of the rotating shaft synchronously under the driving of the vibration driving assembly.

[0013] Further, the vibration driving assembly includes roller disc assemblies arranged on both sides of the vibration disc along the axial direction of the rotating shaft, and the two roller disc assemblies each have a driving roller with a rotating axial direction perpendicular to the axial direction of the rotating shaft; the vibration disc is provided with driving profiles on both sides along the axial direction of the rotating shaft, and when the vibration disc rotates with the rotating shaft, the driving rollers on both sides can synchronously roll along the driving profiles on the corresponding side to drive the vibration disc to reciprocate along the axial direction of the rotating shaft.

[0014] Further, the vibration disc includes a cylindrical disc body slidingly arranged on the rotating shaft and a protruding part arranged on the disc body along the radial direction of the rotating shaft, the protruding part extends around the axial direction of the rotating shaft, and the two driving profiles are arranged on both sides of the protruding part along the axial direction of the rotating shaft.

[0015] Further, the disc body is sleeved with two thrust ball bearings arranged at intervals, and a vibration connecting plate is clamped between the two thrust ball bearings; the vibration output part includes an output shaft sleeve sleeved on the rotating shaft and threadedly connected with the rotating shaft, the second arbor is arranged on the output shaft sleeve, and the output shaft sleeve is connected with the disc body through the vibration connecting plate and can rotate relative to the disc body.

[0016] Furthermore, in the axial direction of the rotating shaft, the drive profile is wavy with crests and troughs; and / or, the drive rollers are a plurality of rollers arranged radially at intervals along the rotating shaft.

[0017] Furthermore, the unfolded shape of the driving surface along the circumferential direction of the rotation axis is a sine curve.

[0018] Furthermore, the roller disk assembly includes a roller disk body sleeved on the rotating shaft, and a plurality of rotating grooves provided on the roller disk body, with each of the driving rollers disposed in each of the rotating grooves; and / or, two roller disk assemblies are connected by a roller disk connecting sleeve, and the vibrating plate is located inside the roller disk connecting sleeve.

[0019] Furthermore, the first tool holder is rotatably mounted on the housing via a tool holder connecting disc; and / or, the second tool holder is provided with a clamp for mounting the drill bit or the reamer.

[0020] Furthermore, the tool holder connecting plate is provided with a roller bearing, and the first tool holder passes through the roller bearing; and / or, the tool holder connecting plate is provided with an anti-rotation rod connected to an external machine tool, the anti-rotation rod being used to prevent the housing from rotating relative to the machine tool.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The longitudinal-torsional composite vibration drill and reamer holder of the present invention, through the coordinated arrangement of the rotating shaft, the vibration generating part and the vibration output part, and under the constraint of the housing, firstly realizes that the vibration output part rotates with the rotation of the rotating shaft. Secondly, when the vibration generating part rotates with the rotating shaft, it can drive the vibration output part to slide back and forth along the axial direction of the rotating shaft, so as to superimpose an axial vibration on the rotation of the vibration output part. Based on the relative rotation of the vibration output part and the vibration generating part, and the use of the threaded connection between the vibration output part and the rotating shaft, the vibration output part can simultaneously generate torsional vibration during the axial vibration. Thus, the vibration output part superimposes a composite vibration composed of axial vibration and torsional vibration during the rotation, thereby realizing the drilling or reaming operation of the longitudinal-torsional composite vibration drill and reamer holder under the composite vibration of axial and torsional vibration.

[0023] In this way, during the drilling or reaming operation of the longitudinal torsion composite vibratory drill and reamer holder, the rake face of the cutting teeth of the drill or reamer and the chip, as well as the flank face and the machined surface, can be periodically separated. During the separation process, the cutting zone opens, allowing the cutting fluid to fully enter, significantly enhancing the lubrication and cooling effect of the cutting fluid, thereby improving the tool life and machining quality. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of the longitudinal torsion composite vibration drill reamer holder according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure shown from another perspective;

[0027] Figure 3 This is a partial structural schematic diagram of the longitudinal-torsional composite vibration drill reamer holder according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the vibration generating mechanism described in an embodiment of the present invention;

[0029] Figure 5 for Figure 4 Partial cross-sectional view of the structure shown;

[0030] Figure 6 This is a schematic diagram of the structure of the vibration connection plate during assembly according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the rotating shaft according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the vibratory feeder according to an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the structure of the rolling disk assembly according to an embodiment of the present invention;

[0034] Figure 10 This is a schematic diagram of the structure of the drive roller according to an embodiment of the present invention;

[0035] Figure 11 This is a schematic diagram of the structure of the roller disc connecting sleeve according to an embodiment of the present invention;

[0036] Figure 12 This is a schematic diagram of the vibration output section according to an embodiment of the present invention;

[0037] Figure 13 This is a schematic diagram of the structure of the second tool holder according to an embodiment of the present invention;

[0038] Figure 14 This is a partial cross-sectional view of the first tool holder and the tool holder connecting disc during assembly, as described in an embodiment of the present invention.

[0039] Figure 15This is an exploded view of the first tool holder and the tool holder connecting disc according to an embodiment of the present invention;

[0040] Figure 16 This is a schematic diagram of the structure of the connecting disk body according to an embodiment of the present invention;

[0041] Figure 17 for Figure 16 A schematic diagram of the structure shown from another perspective;

[0042] Figure 18 This is a schematic diagram of the bearing mounting sleeve according to an embodiment of the present invention;

[0043] Figure 19 This is a schematic diagram of the bearing pressure plate according to an embodiment of the present invention;

[0044] Figure 20 This is a schematic diagram of the structure of the first tool holder and bearing pressure plate assembled according to an embodiment of the present invention;

[0045] Figure 21 This is a schematic diagram of the bottom structure of the first tool holder according to an embodiment of the present invention;

[0046] Figure 22 This is a schematic diagram of the structure of the shell according to an embodiment of the present invention;

[0047] Figure 23 for Figure 22 Partial cross-sectional view of the structure shown;

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Housing; 11. Upper housing; 12. Lower housing; 13. Oil seal pressure plate; 14. Roller disc positioning sleeve; 15. Sliding bearing; 16. Elastic retaining ring; 17. Oil seal;

[0050] 2. Shaft; 21. Connecting key; 22. Spline; 23. First threaded section; 24. Second threaded section;

[0051] 3. Vibration generating part; 31. Vibratory plate; 311. Disc body; 312. Protrusion; 3121. Driving profile; 32. Roller disc assembly; 321. Roller disc body; 322. Rotating groove; 323. Driving roller; 324. Driving roller shaft; 33. Roller disc connecting sleeve; 331. Shell connecting part; 34. Thrust ball bearing; 35. Vibration connecting plate; 36. Bearing sleeve; 37. Angular contact bearing; 38. Bearing cover plate; 39. Nut; 310. Thrust bearing pressure plate;

[0052] 4. Vibration output section; 40. Output shaft sleeve; 41. Internal thread; 42. Output section receiving cavity;

[0053] 5. First tool holder; 51. Machine tool mounting part; 52. First mounting part; 53. Second mounting part; 54. Connecting cavity;

[0054] 6. Second tool holder;

[0055] 7. Tool holder connecting plate; 71. Connecting plate body; 711. First mounting cavity; 712. Sleeve connecting part; 713. Housing connecting part; 72. Bearing mounting sleeve; 721. Second mounting cavity; 722. Hole shoulder; 73. Roller bearing; 74. Bearing pressure plate; 741. Connecting hole; 75. Bearing positioning sleeve; 76. Anti-rotation rod. Detailed Implementation

[0056] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0057] In the description of this invention, it should be noted that the use of terms such as "upper," "lower," "inner," and "outer," indicating orientation or positional relationship, is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description. It does 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, and therefore should not be construed as a limitation of the invention. Furthermore, the use of terms such as "first" and "second" is also for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0059] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0060] This embodiment relates to a longitudinal-torsional composite vibration drill and reamer holder, which can superimpose a composite vibration (i.e., longitudinal vibration) consisting of axial vibration and torsional vibration during the rotational cutting process. This allows for periodic separation between the rake face of the cutting teeth of the drill bit or reamer and the chip, as well as between the flank face and the machined surface, during drilling or reaming operations. During the separation process, the cutting zone opens, allowing the cutting fluid to fully enter, thereby improving the cutting effect.

[0061] In terms of overall structure, such as Figures 1 to 23As shown, the longitudinal torsion composite vibration drill reamer holder of this embodiment includes a housing 1, a vibration generating mechanism disposed within the housing 1, and a reamer holder assembly disposed on the vibration generating mechanism.

[0062] The vibration generating mechanism includes a rotating shaft 2 rotatably mounted on the housing 1, a vibration generating part 3 mounted on the rotating shaft 2, and a vibration output part 4 threadedly connected to the rotating shaft 2. The vibration output part 4 is connected to the vibration generating part 3 and can rotate relative to it. The vibration output part 4 can rotate with the rotation of the rotating shaft 2. At the same time, the vibration generating part 3 can rotate with the rotation of the rotating shaft 2 to drive the vibration output part 4 to slide back and forth along the axial direction of the rotating shaft 2.

[0063] The tool holder assembly includes a first tool holder 5 connected to the rotating shaft 2, and a second tool holder 6 disposed on the vibration output section 4. The first tool holder 5 can receive external driving force to drive the rotating shaft 2 to rotate, and the second tool holder 6 is used to mount a drill bit or a reamer.

[0064] It is understood that when the rotating shaft 2 of this embodiment rotates under the external driving force, the vibration output unit 4 can rotate with the rotation of the rotating shaft 2 under the restriction of the housing 1. During the cutting operation, the rotation of the rotating shaft 2 is preferably set to rotate at a uniform speed. Subsequently, the vibration generating unit 3 drives the vibration output unit 4 to slide back and forth along the axial direction of the rotating shaft 2 as the rotating shaft 2 rotates, thereby superimposing an axial vibration on the vibration output unit 4.

[0065] Furthermore, since the vibration output part 4 is threadedly connected to the rotating shaft 2 and can rotate relative to the vibration generating part 3, the vibration generating part 3 drives the vibration output part 4 to move axially under the drive of the rotating shaft 2, which becomes a torsional vibration around the rotating shaft 2 superimposed on the vibration output part 4. Thus, a composite vibration composed of axial vibration and torsional vibration is superimposed on the rotation of the vibration output part 4.

[0066] It should be noted that the longitudinal torsion composite vibration drill reamer holder of this embodiment has a compact overall structure design, and it is preferably applicable to machine tools well known to those skilled in the art, such as ordinary drilling and milling machines, CNC drilling and milling machines, or machining centers.

[0067] Based on the above design concept, in this embodiment, as an exemplary structure, such as... Figure 3 and Figure 4 As shown, the vibration generating unit 3 includes a vibratory disk 31 slidably disposed on the rotating shaft 2, and a vibration driving assembly disposed in the housing 1, and the vibration driving assembly is sleeved on the rotating shaft 2.

[0068] The vibratory plate 31 can rotate with the rotating shaft 2, and under the drive of the vibration drive assembly, the vibratory plate 31 can synchronously slide back and forth along the axial direction of the rotating shaft 2.

[0069] Specifically, in this embodiment, as a preferred implementation, such as Figure 3 As shown, the vibration drive assembly includes roller disk assemblies 32 disposed on both sides of the vibratory disk 31 along the axis of the rotating shaft 2. Each roller disk assembly 32 has a drive roller shaft 324 whose rotation axis is perpendicular to the axis of the rotating shaft 2, and a drive roller 323 disposed on the drive roller shaft 324.

[0070] The vibratory plate 31 has driving surfaces 3121 on both sides along the axis of the rotating shaft 2. When the vibratory plate 31 rotates with the rotating shaft 2, the driving rollers 323 on both sides can roll synchronously along the driving surfaces 3121 on the corresponding sides to drive the vibratory plate 31 to reciprocate along the axis of the rotating shaft 2.

[0071] Furthermore, combined Figure 8 As shown, in a preferred embodiment, the vibratory plate 31 of this embodiment includes a cylindrical disk body 311 slidably disposed on the rotating shaft 2, and a protrusion 312 disposed on the disk body 311 and arranged radially along the rotating shaft 2. The protrusion 312 extends axially around the rotating shaft 2, and two driving surfaces 3121 are respectively disposed on both sides of the protrusion 312 along the axial direction of the rotating shaft 2.

[0072] In specific settings, combine Figure 7 and Figure 8 As shown, the rotating shaft 2 of this embodiment is provided with a spline 22, and the main body 311 of the disc is provided with a keyway in the middle. The spline 22 is slidably disposed in the keyway, thereby enabling the vibratory plate 31 to rotate with the rotating shaft 2 and to slide back and forth along the axial direction of the rotating shaft 2 under the drive of the drive rollers 323 on both sides.

[0073] Considering that the vibration generating unit 3 and the vibration output unit 4 need to be able to rotate relative to each other while being connected, as a preferred embodiment, refer to... Figure 6 As shown, in this embodiment, two thrust ball bearings 34 are spaced apart on the disc body 311, and a vibration connecting plate 35 is sandwiched between the two thrust ball bearings 34.

[0074] Meanwhile, the vibration output unit 4 includes an output shaft sleeve 40 that is threaded onto the rotating shaft 2 and is sleeved on the rotating shaft 2. The second tool holder 6 is disposed on the output shaft sleeve 40, and the output shaft sleeve 40 is connected to the disk body 311 through the vibration connecting plate 35 and rotates relative to it.

[0075] Understandably, using thrust ball bearings 34 offers advantages such as high load-bearing capacity, stable operation, long service life, and ease of disassembly and maintenance.

[0076] Furthermore, for specific settings, please refer to [link / reference]. Figure 12 As shown, the output shaft sleeve 40 includes a connected large-diameter section and a small-diameter section, the large-diameter section having a portion capable of accommodating the bottom thrust ball bearing 34 and the corresponding portion of the rotating shaft 2.Figure 6 In the state shown, the output cavity 42 has an internal thread 41 in the small diameter section for engaging with the second threaded part 24 of the rotating shaft 2.

[0077] Furthermore, as a preferred implementation method, refer to Figure 6 and Figure 8 As shown in this embodiment, the driving surface 3121 has a wave shape with crests and troughs in the axial direction of the rotating shaft 2. The main advantage of this setting is that it enables the vibratory disk 31 to periodically vibrate axially along the axial direction of the rotating shaft 2 during rotation.

[0078] To ensure the stability of the axial movement of the vibratory feeder 31, in this embodiment, as a preferred implementation, the drive rollers 323 are arranged in multiple radially spaced configurations along the rotating shaft 2. In specific implementations, it remains as follows... Figure 5 As shown, the drive rollers 323 are preferably arranged in two radially spaced positions along the shaft 2, and the two drive rollers 323 are arranged symmetrically.

[0079] It is worth mentioning that, in the specific structure, the two driving surfaces 3121 in this embodiment have the same structural design, and the driving rollers 323 on both sides are arranged axially along the shaft 2 so that the driving rollers 323 on both sides synchronously correspond to the crests or troughs of the driving surfaces 3121 on each side. Thus, the surfaces can be driven synchronously by the driving rollers 323 on both sides, thereby increasing the motion stability of the vibratory feeder 31.

[0080] Moreover, in this embodiment, as a preferred implementation, the unfolded shape of the driving surface 3121 along the circumferential direction of the rotating shaft 2 is a sine curve, which is conducive to realizing the periodic axial vibration of the vibrating plate 31.

[0081] Furthermore, as a preferred implementation, such as Figure 9 and Figure 10 As shown, the roller disk assembly 32 of this embodiment includes a roller disk body 321 sleeved on the rotating shaft 2, and a plurality of rotating grooves 322 provided on the roller disk body 321, with each driving roller 323 disposed in each rotating groove 322.

[0082] It is understandable that providing the rotating groove 322 can improve the structural compactness of the roller disk assembly 32, thereby improving the overall compactness of the longitudinal torsion composite vibratory drill reamer holder in this embodiment, which is beneficial for miniaturization design. In specific configuration, the rotating groove 322 can preferably be set to two, that is, to match the two drive rollers 323 mentioned above.

[0083] Reference Figure 5 and Figure 11As shown, the two roller disk assemblies 32 are connected by a roller disk connecting sleeve 33, and the vibratory plate 31 is located inside the roller disk connecting sleeve 33. The advantage of this arrangement is that it can achieve fixation between the two roller disk assemblies 32 without affecting the movement of the vibratory plate 31.

[0084] In a specific configuration, the roller disk connecting sleeve 33 and the two roller disk assemblies 32 can preferably be connected by cylindrical pins and screws, and the roller disk connecting sleeve 33 is also provided with a shell connecting part 331 for screwing into the housing 1, thereby realizing the fixation of the roller disk connecting sleeve 33 and the two roller disk assemblies 32 in the housing 1.

[0085] That is, when the vibratory plate 31 rotates with the rotating shaft 2, it can achieve periodic vibration along the axial direction of the rotating shaft 2 under the cooperation and limitation of the housing 1, the roller plate connecting sleeve 33 and the two roller plate assemblies 32, so as to achieve the purpose of superimposing an axial vibration on the vibration output part 4.

[0086] Additionally, as an example structure, such as Figures 1 to 3 As shown, in this embodiment, the first tool holder 5 is rotatably mounted on the housing 1 via the tool holder connecting plate 7. To elaborate further, in conjunction with... Figure 14 and Figure 15 As shown, in a preferred embodiment, the tool holder connecting disc 7 of this embodiment is provided with a roller bearing 73, and the first tool holder 5 passes through the roller bearing 73.

[0087] In this embodiment, the roller bearing 73 can preferably be a tapered roller bearing 73 known to those skilled in the art, in order to achieve advantages such as high load capacity, low friction, small axial clearance and easy disassembly and assembly.

[0088] In specific settings, the first tool holder 5 in this embodiment is as follows: Figure 20 As shown, it has a machine tool mounting part 51 for connecting to a machine tool, a first mounting part 52 and a second mounting part 53 for connecting to a tool holder connecting plate 7, and a connecting cavity 54 for connecting to a connecting key 21 of a rotating shaft 2.

[0089] The machine tool mounting part 51 and the connecting cavity 54 are formed in the middle of the first tool holder 5 and are provided through the inner cavity. They are respectively located at both ends of the inner cavity of the first tool holder 5, and can be connected when necessary.

[0090] like Figures 16 to 18As shown, as an exemplary structure, the tool holder connecting plate 7 of this embodiment includes a connecting plate body 71 and a bearing mounting sleeve 72 disposed on the connecting plate body 71. The connecting plate body 71 has a first mounting cavity 711 for connecting to the first mounting portion 52, a sleeve connecting portion 712 screwed to the bearing mounting sleeve 72, and a housing connecting portion 713 located around the sleeve connecting portion 712 and connected to the housing 1. The bearing mounting sleeve 72 has a second mounting cavity 721 for connecting to the second mounting portion 53.

[0091] In this specific implementation, two tapered roller bearings 73 arranged side by side are installed inside the bearing mounting sleeve 72. Figure 3 In the indicated state, the two tapered roller bearings 73 are separated by a bearing positioning sleeve 75. The bearing mounting sleeve 72 is connected to the sleeve connecting part 712 of the tool holder connecting disc 7 by screws. After the two are connected, the outer ring of the upper tapered roller bearing 73 is pressed by the tool holder connecting disc 7, and the outer ring of the lower tapered roller bearing 73 is blocked by the shoulder 722 of the bearing mounting sleeve 72, thereby achieving axial positioning of the two tapered roller bearings 73.

[0092] The second mounting portion 53 of the first tool holder 5 mates with the inner rings of two tapered roller bearings 73 at the end face of the first tool holder 5. Figure 14 In the indicated state, a bearing pressure plate 74 is installed at the bottom of the first tool holder 5 by screws, the shoulder of the second mounting part 53 contacts the inner ring end face of the upper tapered roller bearing 73, and the bearing pressure plate 74 presses against the inner ring end face of the lower tapered roller bearing 73, thereby realizing the axial positioning of the first tool holder 5 and the two tapered roller bearings 73.

[0093] Furthermore, as a preferred embodiment, in this example, the tool holder connecting plate 7 is provided with an anti-rotation rod 76 connected to an external machine tool. The anti-rotation rod 76 is used to prevent the housing 1 from rotating relative to the machine tool. Specifically, the anti-rotation rod 76 can be connected to the tool holder connecting plate 7 by screws to effectively prevent the housing 1 from rotating during machining.

[0094] It is worth mentioning here that, such as Figures 19 to 21 As shown, the bearing pressure plate 74 of this embodiment has a connecting hole 741 for engaging with the connecting key 21 on the rotating shaft 2, which corresponds to and is adapted to the connecting cavity 54. Meanwhile, the relevant structural parts of the first tool holder 5 not mentioned can refer to the BT tool holder commonly used by those skilled in the art, which is connected to the machine tool spindle.

[0095] Meanwhile, as a preferred embodiment, the second tool holder 6 of this embodiment is provided with a clamp for mounting a drill bit or a reamer. The clamp can be a common ER series spring collet or a locking nut. For example, the drill bit or reamer is installed in the inner cavity of the second tool holder 6, and the cavity opening of the inner cavity of the second tool holder 6 is locked by the ER series spring collet or locking nut.

[0096] Furthermore, referring to Figure 13 As shown, the top of the second tool holder 6 is provided with a connecting flange for screwing into the output shaft sleeve 40, so as to improve the ease of disassembly and assembly of the second tool holder 6 and the output shaft sleeve 40, and facilitate later maintenance and replacement.

[0097] The vibration generating mechanism in this embodiment, to elaborate, is... Figure 5 In the state shown, there is a vibratory plate 31 between the upper and lower roller disk assemblies 32. The upper and lower end faces of the protrusion 312 in the vibratory plate 31 are sinusoidal curved surfaces, and the two sinusoidal curved surfaces are in contact with the upper drive roller 323 and the lower drive roller 323 respectively.

[0098] A bearing sleeve 36 is installed in the center hole of the upper roller disc body 321, and two angular contact bearings 37 are installed inside. The bearings are pressed by the bearing cover plate 38. The bearing sleeve 36 and the bearing cover plate 38 are connected to the upper roller disc body 321 by screws.

[0099] The middle part of the rotating shaft 2 is a spline 22. The cylindrical part above the spline 22 is engaged with two angular contact bearings 37 inside the bearing sleeve 36. The upper inner rings of the two angular contact bearings 37 are pressed by two nuts 39. The two nuts 39 are screwed onto the first threaded part 23 of the rotating shaft 2. The upper end of the rotating shaft 2 is connected to the first tool holder 5 through the connecting key 21.

[0100] In this embodiment, two thrust ball bearings 34 are installed on the cylindrical part at the bottom of the vibratory plate 31. A vibration connecting plate 35 is installed between the two thrust ball bearings 34, and a thrust bearing pressure plate 310 for pressing the thrust ball bearings 34 is also screwed to the bottom of the vibratory plate 31.

[0101] The internal thread 41 of the lower part (small diameter section) of the output shaft sleeve 40 engages with the second threaded part 24 of the lower part of the rotating shaft 2. The upper part (large diameter section) of the output shaft sleeve 40 is connected to the vibration connecting plate 35 by screws. The second tool holder 6 is connected to the output shaft sleeve 40 by screws. A drill bit or reamer can be installed at the lower end of the second tool holder 6 using an ER series spring collet and nut.

[0102] When the upper and lower roller disk assembly 32 is fixed, the rotating shaft 2 rotates and drives the vibratory disk 31 to rotate through the spline 22. As the driving surface 3121 of the vibratory disk 31 cooperates with the driving rollers 323 on the upper and lower sides, the vibratory disk 31 vibrates up and down periodically along the axis of the rotating shaft 2 during rotation. Subsequently, the vibration of the roller disk is transmitted to the output shaft sleeve 40 through the vibration connecting plate 35.

[0103] Under the constraint of the threaded connection between the output shaft sleeve 40 and the rotating shaft 2, the output shaft sleeve 40 vibrates along the axial direction of the rotating shaft 2 while simultaneously undergoing torsional vibration around the axial direction of the rotating shaft 2. Thus, the output shaft sleeve 40 outputs a combined longitudinal-torsional vibration consisting of the axial vibration along the axial direction of the rotating shaft 2 and the torsional vibration around the axial direction of the rotating shaft 2, which is then transmitted to the drill bit or reamer through the second tool holder 6.

[0104] Furthermore, since the rotating shaft 2 rotates continuously, the longitudinal-torsional composite vibration is superimposed on the uniform rotation around the axis of the rotating shaft 2, ultimately realizing the longitudinal-torsional composite vibration drilling or reaming operation process.

[0105] In addition, in this embodiment, as an exemplary structure, refer to Figure 1 and Figure 2 As shown, the housing 1 has an upper housing 11 and a lower housing 12, and is combined with Figure 5 , Figure 22 and Figure 23 As shown, a roller disk positioning sleeve 14 is provided inside the upper housing 11, and the roller disk positioning sleeve 14 presses against the upper end face of the upper roller disk body 321. Figure 5 and Figure 22 In the state shown, the lower end face of the lower roller disk assembly 32 engages with the step in the inner hole of the upper housing 11, thereby achieving axial positioning of the vibration generating part 3.

[0106] The upper housing 11 is connected to the tool holder connecting plate 7 by screws, and the upper housing 11 is connected to the roller disk connecting sleeve 33 by screws on both sides, so as to realize the fixed connection between the upper and lower roller disk assembly 32, the roller disk connecting sleeve 33 and the upper housing 11.

[0107] The lower housing 12 is connected to the upper housing 11 by screws. The lower housing 12 is provided with a sliding bearing 15 for supporting the second tool holder 6. The top of the sliding bearing 15 is provided with an elastic retaining ring 16 to limit the axial movement of the sliding bearing 15. An oil seal 17 is installed at the lower end of the lower housing 12. An oil seal pressure plate 13 is connected to the lower housing 12 by screws.

[0108] This longitudinal-torsional composite vibration drilling and reaming tool holder can be installed on ordinary / CNC drilling and milling machines or machining centers. In use, the first tool holder 5 is installed onto the machine tool spindle. The anti-rotation rod 76 engages with a fixing block located on the outer sleeve of the machine tool spindle. When the machine tool spindle rotates, the housing 1 (fixed to the tool holder connecting plate 7) remains stationary under the action of the anti-rotation rod 76, ensuring that both the upper and lower roller disc assemblies 32 remain stationary. The first tool holder 5 drives the rotating shaft 2 to rotate via the connecting key 21. Through the coordination of the vibration generating part 3, the vibration output part 4, and other mechanisms, drilling or reaming operations under composite axial and torsional vibrations are achieved.

[0109] In this embodiment, the longitudinal-torsional composite vibration drill and reamer shank can be configured by the cooperation of the rotating shaft 2, the vibration generating part 3, and the vibration output part 4. Under the constraint of the housing 1, the vibration output part 4 first rotates with the rotating shaft 2. Secondly, based on the uniform rotation of the rotating shaft 2, the vibration generating part 3 can drive the vibration output part 4 to slide back and forth along the axial direction of the rotating shaft 2 when it rotates with the rotating shaft 2. This superimposes an axial vibration (longitudinal vibration) on the rotation of the vibration output part 4. Based on the relative rotation between the vibration output part 4 and the vibration generating part 3, and the threaded connection between the vibration output part 4 and the rotating shaft 2, the vibration output part 4 can simultaneously undergo torsional vibration during the axial vibration. Thus, the vibration output part 4 superimposes a longitudinal-torsional composite vibration composed of axial vibration and torsional vibration during the rotation, thereby realizing the drilling or reaming operation of the second shank 6 under the composite vibration of axial (longitudinal) and torsional vibration.

[0110] In this way, during the drilling or reaming operation of the longitudinal torsion composite vibratory drill and reamer holder, the rake face of the cutting teeth of the drill or reamer and the chip, as well as the flank face and the machined surface, can be periodically separated. During the separation process, the cutting zone opens, allowing the cutting fluid to fully enter, significantly enhancing the lubrication and cooling effect of the cutting fluid, thereby improving the tool life and machining quality.

[0111] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A longitudinal-torsional composite vibration drill reamer holder, characterized in that: It includes a housing (1), a vibration generating mechanism disposed within the housing (1), and a tool holder assembly disposed on the vibration generating mechanism; The vibration generating mechanism includes a rotating shaft (2) rotatably mounted on the housing (1), a vibration generating part (3) mounted on the rotating shaft (2), and a vibration output part (4) threadedly connected to the rotating shaft (2). The vibration output part (4) is connected to the vibration generating part (3) and can rotate relative to it. The vibration output part (4) can rotate with the rotation of the rotating shaft (2). At the same time, the vibration generating part (3) can rotate with the rotation of the rotating shaft (2) to drive the vibration output part (4) to slide back and forth along the axial direction of the rotating shaft (2). The tool holder assembly includes a first tool holder (5) connected to the rotating shaft (2) and a second tool holder (6) disposed on the vibration output part (4). The first tool holder (5) can receive external driving force to drive the rotating shaft (2) to rotate, and the second tool holder (6) is used to install a drill bit or a reamer. The vibration generating part (3) includes a vibratory disk (31) slidably disposed on the rotating shaft (2) and a vibration driving assembly disposed in the housing (1), and the vibration driving assembly is sleeved on the rotating shaft (2); The vibratory disk (31) can rotate with the rotating shaft (2), and under the drive of the vibration drive assembly, the vibratory disk (31) can synchronously slide back and forth along the axial direction of the rotating shaft (2); The vibration drive assembly includes roller disk assemblies (32) arranged on both sides of the vibratory disk (31) along the axis of the rotating shaft (2), and both roller disk assemblies (32) have drive rollers (323) whose rotation axis is perpendicular to the axis of the rotating shaft (2). The vibratory disk (31) has driving surfaces (3121) on both sides along the axial direction of the rotating shaft (2). When the vibratory disk (31) rotates with the rotating shaft (2), the driving rollers (323) on both sides can roll synchronously along the driving surfaces (3121) on the corresponding sides to drive the vibratory disk (31) to reciprocate along the axial direction of the rotating shaft (2). The vibratory plate (31) includes a cylindrical disk body (311) slidably disposed on the rotating shaft (2), and a protrusion (312) disposed on the disk body (311) and arranged radially along the rotating shaft (2). The protrusion (312) extends axially around the rotating shaft (2), and two driving surfaces (3121) are respectively disposed on both sides of the protrusion (312) along the axial direction of the rotating shaft (2). Two thrust ball bearings (34) are spaced apart on the main body of the disc (311), and a vibration connecting plate (35) is sandwiched between the two thrust ball bearings (34). The vibration output part (4) includes an output shaft sleeve (40) that is threaded onto the rotating shaft (2), the second tool holder (6) is disposed on the output shaft sleeve (40), and the output shaft sleeve (40) is connected to the disk body (311) through the vibration connecting plate (35) and rotates relative to it.

2. The longitudinal-torsional composite vibration drill reamer holder according to claim 1, characterized in that: Along the axial direction of the rotating shaft (2), the driving profile (3121) is wavy with crests and troughs; and / or, The drive rollers (323) are a plurality of rollers arranged radially at intervals along the shaft (2).

3. The longitudinal-torsional composite vibration drill reamer holder according to claim 2, characterized in that: The unfolded shape of the driving surface (3121) along the circumference of the rotating shaft (2) is a sine curve.

4. The longitudinal-torsional composite vibration drill reamer holder according to claim 1, characterized in that: The roller assembly (32) includes a roller body (321) sleeved on the rotating shaft (2), and a plurality of rotating grooves (322) provided on the roller body (321), wherein each of the drive rollers (323) is disposed in each of the rotating grooves (322); and / or, The two roller disk assemblies (32) are connected by roller disk connecting sleeves (33), and the vibratory disk (31) is located inside the roller disk connecting sleeves (33).

5. The longitudinal-torsional composite vibration drill reamer holder according to any one of claims 1 to 4, characterized in that: The first tool holder (5) is rotatably mounted on the housing (1) via a tool holder connecting plate (7); and / or, The second tool holder (6) is provided with a clamp for mounting the drill bit or the reamer.

6. The longitudinal-torsional composite vibration drill reamer holder according to claim 5, characterized in that: The tool holder connecting disc (7) is provided with a roller bearing (73), and the first tool holder (5) passes through the roller bearing (73); and / or, The tool holder connecting plate (7) is provided with an anti-rotation rod (76) connected to an external machine tool. The anti-rotation rod (76) is used to prevent the housing (1) from rotating relative to the machine tool.

Images