Vibration drilling tool holder and method of using the same

Abstract

The present invention belongs to the technical field of drilling tools, and specifically discloses a vibration drilling tool holder and a method for using the same. The vibration drilling tool holder includes a shell, a tool holder and a tool rod; a fixed seat is fixedly installed in the shell, and the tool holder is rotatably connected to the fixed seat; a fixed sleeve is provided at the bottom of the fixed seat, and an adjusting disk is threadedly connected to the fixed sleeve, and oil filling holes are arranged circumferentially on the outer circumferential surface of the adjusting disk, and a stop block should be installed in the oil filling hole, and a limited position slot is provided on the fixed sleeve, and an operating window is provided on the shell at the stop block; an amplitude plate driving part is installed at the bottom of the adjusting disk; the tool rod and the tool holder are axially slidably connected, and an amplitude plate is fixedly provided at the upper end of the tool rod; a preload spring is provided between the lower part of the tool rod and the shell. The structural design of the present invention is ingenious, and both the amplitude adjustment function and the friction surface lubrication function are realized through the adjusting disk, and it has the advantages of low structural cost, convenient amplitude adjustment, convenient maintenance and long service life.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling tools, and in particular relates to a vibration drilling tool holder and a use method thereof. Background Art

[0002] At present, when drilling on CNC machine tools, the "drilling cycle" command is often used to achieve chip breaking and chip removal, which greatly delays the processing time. In many hydraulic feed special drilling machines, central water outlet tools are often used to achieve cooling and assist chip removal to improve the drilling quality to a certain extent. In this way, the purchase cost of the drill bit is greatly increased, and the improvement of the problem is limited.

[0003] With the continuous development of material technology, the application of various difficult-to-process materials such as high-strength steel, stainless steel, titanium alloy, and high-temperature alloy is becoming more and more widespread. Traditional drilling processing technology is difficult to meet their processing requirements. There are problems such as large cutting force, high cutting temperature, and severe tool wear during the processing, and the processing surface roughness is poor and the processing accuracy is low.

[0004] Vibration drilling is to add a regular vibration to the drill bit or workpiece during the drilling process, so that there is intermittent contact between the drill bit and the workpiece, which has a better process effect. At present, the mechanical low-frequency vibration cutting method has significant advantages in the processing of difficult-to-process material holes due to the characteristics of no need for additional power source, easy motion control and low cost.

[0005] However, the existing mechanical vibration drilling tool holder technology is still immature, with problems such as complex structural design, difficult to control assembly errors, inability to flexibly adjust the amplitude according to processing needs, and the inability to lubricate the friction surface of the vibration disk, which greatly reduces the service life.

[0006] For example, the patent document with publication number CN 117505908A discloses a longitudinal-torsional composite vibration drill reamer handle, which includes a shell, a vibration generating part, a vibration output part, a first handle and a second handle, wherein the vibration generating part includes a vibration plate, and roller plate assemblies arranged on both sides of the vibration plate, and the two roller plate assemblies both have driving rollers, and driving surfaces are arranged on both sides of the vibration plate, and the driving rollers on both sides can synchronously roll along the driving surfaces on the corresponding sides to drive the vibration plate to slide back and forth along the axial direction. The tool handle has the following technical defects: first, its structural design is relatively complex and costly. This structure requires the driving rollers on both sides to roll synchronously along the driving surfaces on the corresponding sides in order to cooperate in realizing the reciprocating sliding of the vibration plate along the axial direction. The assembly error between the driving rollers on both sides and the driving surfaces on both sides of the vibration plate is difficult to control, so it is difficult to achieve synchronous drive; secondly, the amplitude of the vibration plate cannot be adjusted due to the limitation of the driving rollers on both sides, which greatly limits the scope of application of the processing; thirdly, this structure determines that the driving surfaces (i.e., friction surfaces) on both sides of the vibration plate and the driving rollers cannot be lubricated, and will be severely worn over time, which will greatly reduce the service life. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a vibration drilling tool holder with simple and ingenious structural design, low cost, convenient amplitude adjustment and long service life.

[0008] In order to solve the above technical problems, the technical solution of the present invention is: a vibration drilling tool holder, comprising a housing, a tool holder connected to a machine tool spindle, and a tool rod for clamping a tool;

[0009] A fixing seat is fixedly installed in the shell, and the middle part of the shank is rotatably connected to the fixing seat through a bearing; a fixing sleeve is provided at the bottom of the fixing seat, and an adjusting disk is threadedly connected to the fixing sleeve, and more than two oil filling holes are arranged circumferentially on the outer circumferential surface of the adjusting disk, and a stop block is correspondingly installed at at least one oil filling hole, and a fixing hole is provided on the stop block; a limiting groove is provided on the fixing sleeve and is engaged with the stop block, and an operating window is provided on the shell at the stop block; an oil filling channel corresponding to each oil filling hole is provided at the bottom of the adjusting disk, and an amplitude plate driving member is installed at the bottom of the adjusting disk;

[0010] A spline is provided on the lower handle body of the tool handle, a keyway matching the spline is provided inside the tool rod, and the tool rod and the tool handle are axially slidably connected; an amplitude plate is fixedly provided on the upper end of the tool rod, and an amplitude profile is formed on the upper end surface of the amplitude plate; a preload spring is provided between the lower part of the tool rod and the shell, and under the elastic force of the preload spring, the amplitude profile of the amplitude plate is always attached to the amplitude plate driving member.

[0011] As a preferred technical solution, the adjusting disk comprises an upper disk body, a middle disk body and a lower disk sleeve which are sequentially arranged along the axial direction;

[0012] A thread is arranged on the outer circumferential surface of the upper disk body, and the upper disk body is connected to the fixing sleeve through the thread; a plurality of cross sections are formed on the outer circumferential surface of the middle disk body, and the oil filling holes are arranged on the cross sections at intervals; a mounting hole is arranged on the cross section between two adjacent oil filling holes, and a plug screw is arranged in the mounting hole, and a mounting groove corresponding to the mounting hole is arranged in the middle disk body, and an amplitude plate driving component is installed in each of the mounting grooves through a plug screw.

[0013] As a preferred technical solution, a sealing sleeve is provided at the upper end of the knife rod and is sleeved on the outer peripheral side of the amplitude plate, and a sealing ring is provided between the sealing sleeve and the lower disc sleeve.

[0014] As a preferred technical solution, the amplitude plate driving component is a roller or a bearing.

[0015] As a preferred technical solution, a rotation-stop handle is fixedly mounted on the upper portion of the shell.

[0016] As a preferred technical solution, a bearing is mounted on the knife rod, and the preload spring is arranged between the bearing and the housing.

[0017] As a preferred technical solution, the amplitude plate includes a base plate and a wear-resistant lining covered on the base plate, and the wear-resistant lining is formed with the amplitude profile.

[0018] As a preferred technical solution, the amplitude profile is a wavy surface, which becomes a sinusoidal surface after being unfolded.

[0019] As a preferred technical solution, a decorative cover is mounted on the shell, and the decorative cover is threadedly connected to the shell.

[0020] The present invention also provides a method for using the vibration drilling tool holder described above, including an amplitude adjustment method and a lubrication maintenance method;

[0021] The amplitude adjustment method comprises the following steps:

[0022] S11. First remove the stopper installed at the oil filling hole from the operating window of the housing;

[0023] S12, then the rotary adjustment disk is turned from the operation window to make the adjustment disk rise and fall relative to the fixed sleeve to change the pre-compression amount of the pre-tightening spring, thereby achieving amplitude adjustment;

[0024] S13, according to the need to adjust the amplitude, turn the rotary adjustment disk and rotate the other corresponding oil filling holes on the adjustment disk to the operation window, and then lock the adjustment disk with a stop block to complete the amplitude adjustment;

[0025] The lubrication maintenance method comprises the following steps:

[0026] S21, remove the stopper block installed at the oil filling hole from the operating window of the housing and replace the upper oil filling nozzle;

[0027] S22, using a grease gun to inject lubricating oil from the grease nozzle into the grease hole, and the lubricating oil enters the friction surface of the amplitude plate and the amplitude plate driving member through the grease channel connected to the grease hole;

[0028] S23. Remove the oiling nozzle and reinstall the stop block to complete the lubrication maintenance.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects: by adopting a fixed sleeve to cooperate with the adjusting disk, oil filling holes are arranged circumferentially on the outer circumferential surface of the adjusting disk, stop blocks are installed correspondingly at the oil filling holes, and an operation window is opened on the shell at the stop blocks; an oil filling channel connected to the corresponding oil filling holes is arranged at the bottom of the adjusting disk; the tool rod and the tool handle are connected in an axial sliding manner, and an amplitude plate is fixedly arranged at the upper end of the tool rod, and a preload spring is arranged between the lower part of the tool rod and the shell. This structural design is simple and ingenious. Under the elastic force of the preload spring, the amplitude profile of the amplitude plate on the upper part of the tool rod is always in contact with the amplitude plate driving part, so that the drill bit can be kept in constant contact during drilling. During a certain feeding process, a regular low-frequency reciprocating motion along the axial direction can be superimposed on itself, so that the feeding changes periodically and becomes intermittent processing, achieving the effect of obvious chip breaking and smooth chip removal, and the surface quality of the hole wall after processing is significantly improved; and this structure can simply and conveniently adjust the amplitude of the tool rod by rotating the adjusting disk only after disassembling the stop block, and can lubricate and maintain the friction surface of the amplitude plate through the oil filling hole on the adjusting disk. In other words, one component is used to realize both the amplitude adjustment function and the friction surface lubrication function, which has the advantages of low structural cost, convenient amplitude adjustment, convenient maintenance and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0031] Figure 1 is a schematic diagram of the appearance structure of an embodiment of the present invention;

[0032] Figure 2 is a schematic cross-sectional structural diagram of an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of the appearance structure of a knife handle in an embodiment of the present invention;

[0034] Figure 4 is a schematic cross-sectional structural diagram of a knife handle in an embodiment of the present invention;

[0035] Figure 5 1 is a schematic diagram of a top view of a knife bar in an embodiment of the present invention;

[0036] Figure 6 is a schematic cross-sectional structural diagram of a tool bar in an embodiment of the present invention;

[0037] Figure 7 is a schematic structural diagram of an amplitude plate in an embodiment of the present invention;

[0038] Figure 8 is a schematic structural diagram of a fixing base in an embodiment of the present invention;

[0039] Fig. 9 is a schematic structural diagram of an adjustment disk in an embodiment of the present invention;

[0040] Fig.10 It is a schematic diagram of the assembly of the adjustment disk and the amplitude plate driving member in an embodiment of the present invention;

[0041] Fig.11 is a schematic structural diagram of an embodiment of the present invention when the decorative cover is removed;

[0042] Fig.12 It is a schematic diagram of the structure of the embodiment of the present invention when the decorative cover and the shell are removed.

[0043] In the figure: 1-housing; 11-sealing ring; 12-decorative cover; 13-operating window; 2-tool handle; 21-mounting part; 22-spline; 3-tool bar; 31-keyway; 32-amplitude plate; 321-base plate; 322-wear-resistant lining; 323-amplitude profile; 33-sealing sleeve; 4-fixing seat; 41-fixing sleeve; 42-limiting slot; 5-plug screw; 6-amplitude plate driving part; 7-rotation stop handle; 8-stop block; 9-adjusting disk; 91-upper disk body; 92-middle disk body; 93-lower disk sleeve; 94-oil filling hole; 95-mounting hole; 96-mounting slot; 97-oil filling channel; 10-preload spring. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0045] like Figures 1 to 7As shown, the vibration drilling tool holder includes a housing 1, a tool holder 2 and a tool bar 3. The upper part of the tool holder 2 has a mounting portion 21 for connecting to the machine tool spindle. The lower handle body of the tool holder 2 is provided with a spline 22. The interior of the tool bar 3 is provided with a keyway 31 that cooperates with the spline 22. The tool bar 3 is connected to the tool holder 2 in an axial sliding manner. The lower end of the tool bar 3 is used to clamp the tool. The upper end of the tool bar 3 is fixedly connected to an amplitude plate 32 via a fixing pin. A fixing seat 4 is fixedly installed in the housing 1. The middle part of the tool holder 2 is rotatably connected to the fixing seat 4 via bearings I and II. When the machine tool spindle rotates, the tool holder 2 can be driven to rotate, and the tool bar 3 rotates with the tool holder 2 at the same time.

[0046] As a specific embodiment, a rotation-stop handle 7 is fixedly mounted on the upper portion of the housing 1 , and the rotation-stop handle 7 is used to be connected to the machine tool housing so that the fixing seat 4 remains fixed during the rotation of the tool handle 2 .

[0047] refer to Figure 2 and Figure 8 A fixing sleeve 41 is provided at the bottom of the fixing seat 4, and an adjusting disk 9 is connected to the fixing sleeve 41 through an internal thread. By rotating the adjusting disk 9, the adjusting disk 9 can be raised and lowered in the axial direction to achieve corresponding amplitude adjustment.

[0048] refer to Fig. 9 and Fig.10 The adjusting disk 9 includes an upper disk body 91, a middle disk body 92 and a lower disk sleeve 93 arranged in sequence along the axial direction; a thread is arranged on the outer circumference of the upper disk body 91, and the upper disk body 91 is connected to the fixing sleeve 41 through the thread; a plurality of sections are formed on the outer circumference of the middle disk body 92, and more than two oil injection holes 94 are arranged along the circumference, and the oil injection holes 94 are arranged at intervals on the sections. In this embodiment, there are 5 oil injection holes 94, and according to the need of adjusting the amplitude, the adjusting disk 9 can be rotated to adjust the amplitude of the 5 strokes of the adjusting disk 9.

[0049] A mounting hole 95 is provided on the cross section between two adjacent oiling holes 94, a plug screw 5 is provided in the mounting hole 95, a mounting groove 96 corresponding to the mounting hole 95 is provided in the middle plate body 92, an amplitude plate driving member 6 is installed in each mounting groove 96 through a plug screw 5, and the amplitude plate driving member 6 can be a rolling body such as a roller or a bearing; an oiling channel 97 corresponding to each oiling hole 94 is provided at the bottom of the adjusting plate 9. The above structural design of the adjusting plate 9 can not only facilitate the amplitude adjustment function, but also facilitate the lubrication function of the friction surface, thereby greatly simplifying the structure of the vibration drilling tool holder and reducing the manufacturing cost.

[0050] In this embodiment, two of the oil filling holes 94 are correspondingly installed with stop blocks 8, and the stop blocks 8 are provided with fixing holes for fixing with screws; Figure 8 and Fig.12 A limiting groove 42 that cooperates with the stop block 8 is provided on the outer wall of the fixing sleeve 41. After the adjusting disk 9 is adjusted into place, the stop block 8 and the adjusting disk 9 are fixed by screws, and the stop block 8 is limited by the limiting groove 42 formed on the fixing sleeve 41. The structural design is ingenious and compact.

[0051] refer to Fig.11 An operating window 13 is provided on the housing 1 at the stop block 8, so that the adjusting disk 9 can be rotated and adjusted or lubricated through the space reserved at the operating window 13 without disassembling the housing 1, which facilitates adjustment operation and maintenance.

[0052] refer to Figure 1 In order to improve the appearance, the housing 1 is provided with a decorative cover 12, which can cover the operating window 13. The decorative cover 12 is preferably connected to the housing 1 by threads, and the decorative cover 12 can be quickly screwed off from the bottom of the housing 1 during adjustment or maintenance operations.

[0053] refer to Figure 7 In this embodiment, the amplitude plate 32 includes a base plate 321 and a wear-resistant lining 322 covered on the base plate 321. The wear-resistant lining 322 is made of high-carbon chromium bearing steel, and an amplitude profile 323 is formed on the wear-resistant lining 322; the amplitude profile 323 is a wavy surface, which is a sinusoidal surface after unfolding, so as to cooperate with the amplitude plate driving member 6 to drive the tool rod 3 to achieve periodic vibration along the axial direction;

[0054] A preload spring 10 is provided between the lower part of the knife bar 3 and the housing 1. In this embodiment, a bearing III is mounted on the knife bar 3, and the preload spring 10 is provided between the bearing III and the housing 1. In this way, under the elastic force of the preload spring 10, the amplitude profile 323 of the amplitude plate 32 can always fit on the amplitude plate driving member 6. By rotating the adjustment disk 9, the adjustment disk 9 is raised and lowered relative to the fixing sleeve 41 to change the pre-compression amount of the preload spring 10, and the amplitude adjustment can be achieved.

[0055] refer to Figure 2 and Figure 6 The upper end of the knife rod 3 is provided with a sealing sleeve 33 sleeved on the outer peripheral side of the amplitude plate 32, and a sealing ring 11 is provided between the sealing sleeve 33 and the lower disk sleeve 93 of the adjustment disk 9 to achieve the sealing effect when the butter is lubricated and maintained on the friction surface (amplitude profile) of the amplitude plate 32.

[0056] The amplitude adjustment method of the vibration drilling tool holder comprises the following steps:

[0057] S11, first remove the decorative cover 12 from the housing 1, and remove the stopper 8 installed at the oil filling hole 94 from the operating window 13 of the housing 1;

[0058] S12, then use a screwdriver to turn the rotating adjustment disk 9 from the operating window 13, so that the adjustment disk 9 rises and falls relative to the fixed sleeve 41 to change the pre-compression amount of the pre-tightening spring 10, thereby achieving amplitude adjustment;

[0059] S13, according to the need of adjusting the amplitude, turn the rotating adjustment disk 9 and rotate the other corresponding oil filling holes on the adjustment disk 9 to the operation window 13, and then lock the adjustment disk 9 with the stop block 8, so as to complete the amplitude adjustment;

[0060] The lubrication maintenance method of the vibration drilling tool holder comprises the following steps:

[0061] S21, remove the decorative cover 12 from the housing 1, remove the stopper 8 installed at the oil filling hole 94 from the operating window 13 of the housing 1 and replace the upper oil filling nozzle;

[0062] S22, using a grease gun to pump lubricating oil from the grease nozzle into the grease hole, and the lubricating oil enters the friction surface between the amplitude plate 32 and the amplitude plate driving member 6 through the grease channel connected to the grease hole;

[0063] S23, remove the oiling nozzle and reinstall the stop block 8 to complete the lubrication maintenance.

[0064] The present invention adopts a fixed sleeve to cooperate with the adjusting disk, and the knife rod and the knife handle are slidably connected by a spline. The pre-compression of the preload spring can be used to conveniently realize amplitude adjustment. At the same time, oil filling holes are arranged circumferentially on the outer peripheral surface of the adjusting disk and a stop block is set. An operating window is opened on the shell to facilitate lubrication and maintenance.

[0065] The overall structural design of the vibration drilling tool holder is simple and ingenious. Under the elastic force of the preloaded spring, the amplitude profile of the amplitude plate on the upper part of the tool rod is always in contact with the amplitude plate driving part, so that during the constant feed process of drilling, the drill bit can superimpose a regular low-frequency reciprocating motion along the axial direction, so that the feed changes periodically and becomes intermittent processing, achieving obvious chip breaking and smooth chip removal, and significantly improving the surface quality of the hole wall after processing; and this structure can simply and conveniently adjust the amplitude of the tool rod by rotating the adjustment disk only after disassembling the stop block, and can also lubricate and maintain the friction surface of the amplitude plate through the oil filling hole on the adjustment disk, using one component to realize both the amplitude adjustment function and the friction surface lubrication function, and has the advantages of low structural cost, convenient amplitude adjustment, convenient maintenance and long service life.

[0066] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A vibration drilling tool holder, comprising a housing, a tool holder connected to a machine tool spindle, and a tool bar for clamping a tool; characterized in that: A fixing seat is fixedly installed in the shell, and the middle part of the shank is rotatably connected to the fixing seat through a bearing; a fixing sleeve is provided at the bottom of the fixing seat, and an adjusting disk is threadedly connected to the fixing sleeve, and more than two oil filling holes are arranged circumferentially on the outer circumferential surface of the adjusting disk, and a stop block is correspondingly installed at at least one oil filling hole, and a fixing hole is provided on the stop block; a limiting groove is provided on the fixing sleeve and is engaged with the stop block, and an operating window is provided on the shell at the stop block; an oil filling channel corresponding to each oil filling hole is provided at the bottom of the adjusting disk, and an amplitude plate driving member is installed at the bottom of the adjusting disk; The adjusting disk comprises an upper disk body, a middle disk body and a lower disk sleeve which are sequentially arranged along the axial direction; a thread is arranged on the outer circumferential surface of the upper disk body, and the upper disk body is connected to the fixing sleeve through the thread; a plurality of cut surfaces are formed on the outer circumferential surface of the middle disk body, and the oil injection holes are arranged on the cut surfaces at intervals; a mounting hole is arranged on the cut surface between two adjacent oil injection holes, and a plug screw is arranged in the mounting hole, and a mounting groove corresponding to the mounting hole is arranged in the middle disk body, and an amplitude plate driving member is respectively installed in each of the mounting grooves through a plug screw; A spline is provided on the lower handle body of the tool handle, a keyway matching the spline is provided inside the tool rod, and the tool rod and the tool handle are axially slidably connected; an amplitude plate is fixedly provided on the upper end of the tool rod, and an amplitude profile is formed on the upper end surface of the amplitude plate; a preload spring is provided between the lower part of the tool rod and the shell, and under the elastic force of the preload spring, the amplitude profile of the amplitude plate is always attached to the amplitude plate driving member.

2. The vibration drilling handle according to claim 1, characterized in that: The upper end of the knife rod is provided with a sealing sleeve sleeved on the outer peripheral side of the amplitude plate, and a sealing ring is provided between the sealing sleeve and the lower plate sleeve.

3. The vibration drilling handle according to claim 1, characterized in that: The amplitude plate driving member is a roller or a bearing.

4. The vibration drilling handle according to claim 1, characterized in that: A rotation-stop handle is fixedly mounted on the upper portion of the shell.

5. The vibration drilling handle according to claim 1, characterized in that: A bearing is sleeved on the knife rod, and the preload spring is arranged between the bearing and the housing.

6. The vibration drilling handle according to claim 1, characterized in that: The amplitude plate includes a base plate and a wear-resistant lining covered on the base plate, and the wear-resistant lining is formed with the amplitude profile.

7. The vibration drilling handle according to claim 1, characterized in that: The amplitude profile is a wavy curved surface.

8. The vibration drilling handle according to any one of claims 1 to 7, characterized in that: A decorative cover is sleeved on the shell, and the decorative cover is threadedly connected to the shell.

9. The method for using the vibration drilling handle according to claim 1, characterized in that: Including amplitude adjustment method and lubrication maintenance method; The amplitude adjustment method comprises the following steps: S11. First remove the stopper installed at the oil filling hole from the operating window of the housing; S12, then the rotary adjustment disk is turned from the operation window to make the adjustment disk rise and fall relative to the fixed sleeve to change the pre-compression amount of the pre-tightening spring, thereby achieving amplitude adjustment; S13, according to the need to adjust the amplitude, turn the rotary adjustment disk and rotate the other corresponding oil filling holes on the adjustment disk to the operation window, and then lock the adjustment disk with the stop block to complete the amplitude adjustment; The lubrication maintenance method comprises the following steps: S21, remove the stopper block installed at the oil filling hole from the operating window of the housing and replace the upper oil filling nozzle; S22, using a grease gun to inject lubricating oil from the grease nozzle into the grease hole, and the lubricating oil enters the friction surface of the amplitude plate and the amplitude plate driving member through the grease channel connected to the grease hole; S23. Remove the oiling nozzle and reinstall the stop block to complete the lubrication maintenance.

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