阅读说明：本技术 一种自激振动钻孔刀柄装置 (Self-excited vibration drilling cutter handle device ) 是由 彭小敢 李红 李亮 于 2021-09-09 设计创作，主要内容包括：本发明公开了一种自激振动钻孔刀柄装置,涉及机械制造钻削小直径深孔技术领域,包括刀柄体、刀杆、压电陶瓷块和信号转换传输模块,所述刀柄体内设有安装孔,所述安装孔的开口位于所述刀柄体的右端面,所述刀杆安装在所述安装孔内,所述刀杆可沿所述安装孔的轴向运动；所述的压电陶瓷块安装在所述安装孔的底面；所述压电陶瓷块与所述刀杆的左端面之间设有弹簧；所述信号转换传输模块安装在所述刀柄体的外侧,所述信号转换传输模块与所述压电陶瓷块之间通过信号接线连接。本发明通过将钻削中的再生型颤振调整为刀杆相对于刀柄体的具有一定规律的周期性持续振动,实现自激振动钻削,从而提高钻削加工效率,本发明还能实时监测自激振动钻削过程。(The invention discloses a self-excited vibration drilling cutter handle device, which relates to the technical field of mechanical manufacturing and drilling of small-diameter deep holes and comprises a cutter handle body, a cutter rod, a piezoelectric ceramic block and a signal conversion transmission module, wherein a mounting hole is formed in the cutter handle body, an opening of the mounting hole is positioned on the right end face of the cutter handle body, the cutter rod is mounted in the mounting hole, and the cutter rod can move along the axial direction of the mounting hole; the piezoelectric ceramic block is arranged on the bottom surface of the mounting hole; a spring is arranged between the piezoelectric ceramic block and the left end face of the cutter bar; the signal conversion transmission module is installed on the outer side of the cutter handle body, and the signal conversion transmission module is connected with the piezoelectric ceramic block through a signal wiring. The invention realizes self-excited vibration drilling by adjusting the regenerative vibration in drilling into the periodic continuous vibration of the cutter bar relative to the cutter handle body with a certain rule, thereby improving the drilling efficiency.)

1. The self-excited vibration drilling cutter handle device is characterized by comprising a cutter handle body (1) and a cutter bar, wherein a mounting hole is formed in the cutter handle body (1), an opening of the mounting hole is located on the right end face of the cutter handle body (1), the cutter bar is mounted in the mounting hole, and the cutter bar can move along the axial direction of the mounting hole; a spring (9) is arranged between the bottom surface of the mounting hole and the left end surface of the cutter bar; the first end of the spring (9) is in contact with the bottom surface of the mounting hole, and the second end of the spring is in contact with the left end surface of the cutter bar.

2. The self-excited vibration drilling cutter handle device according to claim 1, wherein the mounting hole comprises a blind hole (17), a splined hole (18) and a first threaded hole (14) which are coaxially arranged from left to right, and the diameters of the blind hole (17), the splined hole (18) and the first threaded hole (14) are sequentially increased; an adjusting screw cap (12) and a locking screw cap (13) are arranged in the first threaded hole (14);

the cutter bar is a hollow stepped shaft and comprises a first cutter bar shaft section (101) and a second cutter bar shaft section (102), and the diameter of the first cutter bar shaft section (101) is larger than that of the second cutter bar shaft section (102); the right end of the second cutter bar shaft section (102) is connected with the tail part of the twist drill (16); the inner holes of the locking screw cap (13) and the adjusting screw cap (12) are in clearance fit with the second cutter bar shaft section (102); the left side surface of the adjusting screw cap (12) is in contact with the right end surface of the first cutter bar shaft section (101), and the right side surface of the adjusting screw cap (12) is in contact with the locking screw cap (13); the first cutter bar shaft section (101) is matched with the spline hole (18) through a spline;

the first end of spring (9) with the bottom surface contact of blind hole (17), the second end of spring (9) with the left end face contact of first cutter arbor shaft section (101).

3. A self-exciting vibration drill shank device according to claim 2, wherein the bottom of the blind hole (17) is provided with a piezoelectric ceramic block (5), and the first end of the spring (9) is in contact with the piezoelectric ceramic block (5); the signal wiring (3) of the piezoelectric ceramic block (5) penetrates out of the process hole in the cutter handle body (1) and is connected with the signal conversion and transmission module (4); the signal conversion and transmission module (4) is arranged on a module bracket (7) at the outer side of the knife handle body (1).

4. The self-excited vibration drilling cutter handle device according to claim 2, wherein an observation ring (11) is sleeved at the right end of the cutter handle body (1), the observation ring (11) is of a cylindrical structure, the right end of the observation ring (11) is a closed end face with a central threaded hole, the closed end face is in threaded connection with the second cutter arbor shaft section (102), and the inner side face of the observation ring (11) and the left side face of the closed end face are not in contact with the cutter handle body (1) all the time.

5. A self-excited vibration drilling tool shank device according to claim 4, wherein a spring chuck (20) is arranged at the right end of the second tool bar shaft section (102), and the tail part of the twist drill (16) is arranged in the spring chuck (20) and is fixed through a nut (15) outside the spring chuck (20); the right side surface of the closed end surface of the observation ring (11) is in contact with the nut (15).

6. A self-excited vibration drill shank device according to claim 3, wherein a gasket (6) is arranged between the piezoelectric ceramic block (5) and the spring (9), one side of the gasket (6) is contacted with the piezoelectric ceramic block (5), and the other side is contacted with the spring (9);

the piezoelectric ceramic block (5) and the gasket (6) are fixed on the bottom surface of the blind hole (17) through a screw (8), a second threaded hole (19) coaxial with the mounting hole is formed in the bottom surface of the blind hole (17), and the screw (8) penetrates through the gasket (6) and a through hole in the piezoelectric ceramic block (5) to be connected with the second threaded hole (19); the cutter bar is characterized in that a counter bore is formed in the left end face of the first cutter bar shaft section (101), the first end of the spring (9) is sleeved at the head of the screw (8), the second end of the spring (9) is arranged in the counter bore, and the axis of the screw (8) and the axis of the counter bore coincide with the axis of the mounting hole.

7. The self-excited vibration drilling cutter handle device according to claim 3, wherein a cutter clamping groove shoulder is arranged on the outer side of the cutter handle body (1), the module support (7) is of an annular structure, and the module support (7) is clamped on the cutter handle body (1) on the right side of the cutter clamping groove shoulder; the left end surface of the module support (7) is in contact with the right side surface of the shoulder of the clamping groove.

8. A self-excited vibration drilling tool shank device according to claim 7, wherein the tool clamping groove shoulder is positioned outside the blind hole (17), the outer annular surface of the tool clamping groove shoulder is provided with a V-shaped annular groove, and the process holes comprise a first process hole and a second process hole;

the first process hole is perpendicular to the axis of the blind hole (17), the first end of the first process hole is communicated with the blind hole (17), the second end of the first process hole is positioned at the bottom of the V-shaped ring groove, the first end of the second process hole is positioned on the right end surface of the tool clamping groove shoulder, and the second end of the second process hole is communicated with the middle of the first process hole; after a signal wiring (3) of the piezoelectric ceramic block (5) penetrates through the first end of the first fabrication hole, the signal wiring penetrates out of the first end of the second fabrication hole and is connected with the signal conversion and transmission module (4); and the second end of the first fabrication hole is blocked by a plug (2).

9. A self-exciting vibration drilling tool shank apparatus according to any one of claims 1 to 8, wherein when the self-exciting vibration drilling tool shank apparatus drills a small diameter deep hole, a modal equation formula is as follows:

parameters (m, c, k) in a modal equation formula are determined by a self-excited vibration drilling tool holder device, a tool bar, a vibration body A consisting of an observation ring, a spring chuck, a nut and a twist drill are arranged on the tool bar, m represents the mass of the vibration body A, c represents the damping between the vibration body A and the tool holder body, k represents the rigidity of the spring, t represents time, and Z (t) represents the instantaneous axial position of the vibration body A;

the dynamic drill thrust F on the right side of the formula is determined by workpiece materials, cutting parameters, twist drill materials and structural geometric parameters of the twist drill, the cutting parameters comprise the rotating speed and the feeding amount of the twist drill, a stable state domain graph capable of generating stable self-excited vibration when a specific small-diameter deep hole of a specific material is drilled can be obtained through deduction calculation of a modal equation formula, the rotating speed of the twist drill and the rigidity k of the spring can be initially selected from the stable state domain graph, and then the proper spring and the rotating speed of the twist drill are selected during drilling operation.

Technical Field

The invention belongs to the technical field of mechanical manufacturing and drilling of small-diameter deep holes, and particularly relates to a self-excited vibration drilling tool shank device.

Background

The small-diameter deep hole machining is a technical problem of machining, is limited by the structural characteristics of a drill bit, chip breaking, chip removal, cutting speed and the like, and has the problems of low machining precision, poor hole wall surface quality, low machining efficiency and the like when a conventional method is adopted to drill the small-diameter deep hole. At present, the small-diameter deep hole machining generally adopts methods such as stepped feed drilling, low-frequency or ultrasonic vibration drilling and other special machining methods, but the methods have the problems of low efficiency or high use cost.

The general handle of a knife device generally includes the handle of a knife body, collet chuck and nut, and the one end of the handle of a knife body inserts in the lathe main shaft is downthehole, and collet chuck and nut are installed to the other end to be connected with drills such as fluted drill, during drilling add man-hour, if the parameter is selected unreasonablely, the drilling in-process will produce the phenomenon of shimmying.

Regenerative chatter is a chatter phenomenon that is common in cutting. Regenerative chatter is generally considered to be detrimental and is desirably avoided and suppressed. In a general processing system, the excitation force generated by the regenerative chatter will cause the weak link of the processing system to vibrate, if the weak link cannot be inhibited, the continuous reinforcement of the regenerative chatter will cause the processing quality of the workpiece to be degraded, or the qualified parts cannot be processed, and even the processing system to be damaged.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to solve the problems in the prior art and provides a self-excited vibration drilling cutter handle device.

The technical scheme is as follows: a self-excited vibration drilling cutter handle device comprises a cutter handle body and a cutter bar, wherein a mounting hole is formed in the cutter handle body, an opening of the mounting hole is located on the right end face of the cutter handle body, the cutter bar is mounted in the mounting hole, and the cutter bar can move along the axial direction of the mounting hole; a spring is arranged between the bottom surface of the mounting hole and the left end surface of the cutter bar; one end of the spring is in contact with the bottom surface of the mounting hole, and the other end of the spring is in contact with the left end face of the cutter bar.

Furthermore, the mounting hole sequentially comprises a blind hole, a spline hole and a first threaded hole from left to right, and the diameters of the blind hole, the spline hole and the threaded hole are sequentially increased; an adjusting screw cap and a locking screw cap are arranged in the first threaded hole;

the cutter bar is a hollow stepped shaft and comprises a first cutter bar shaft section and a second cutter bar shaft section, and the diameter of the first cutter bar shaft section is larger than that of the second cutter bar shaft section; the right end of the second cutter bar shaft section is connected with the tail part of the twist drill; the inner holes of the locking screw cap and the adjusting screw cap are in clearance fit with the second cutter bar shaft section; the left side surface of the adjusting screw cap is in contact with the right end surface of the first cutter bar shaft section, and the right side surface of the adjusting screw cap is in contact with the locking screw cap; the first cutter bar shaft section is matched with the spline hole through a spline;

the first end of the spring is in contact with the bottom surface of the blind hole, and the second end of the spring is in contact with the left end face of the first cutter bar shaft section.

Furthermore, a piezoelectric ceramic block is arranged at the bottom of the blind hole, and the first end of the spring is in contact with the piezoelectric ceramic block; the signal wiring of the piezoelectric ceramic block penetrates out of the process hole on the cutter handle body and is connected with the signal conversion and transmission module; the signal conversion transmission module is arranged on a module support outside the cutter handle body.

Further, the right end cover of the cutter handle body is provided with an observation ring, the observation ring is of a cylindrical structure, the right end of the observation ring is a closed end face with a central threaded hole, the closed end face is in threaded connection with the second cutter bar shaft section, and the inner side face of the observation ring and the left side face of the closed end face are not in contact with the cutter handle body all the time.

Further, a spring chuck is arranged at the right end of the second cutter bar shaft section, and the tail part of the twist drill is installed in the spring chuck and fixed through a nut on the outer side of the spring chuck; and the right side surface of the closed end surface of the observation ring is in contact with the nut.

Furthermore, a gasket is arranged between the piezoelectric ceramic block and the spring, one side of the gasket is in contact with the piezoelectric ceramic block, and the other side of the gasket is in contact with the spring;

the piezoelectric ceramic block and the gasket are fixed on the bottom surface of the blind hole through screws, a second threaded hole coaxial with the mounting hole is formed in the bottom surface of the blind hole, and the screws penetrate through the gasket and the through holes in the piezoelectric ceramic block and are connected with the second threaded hole; the cutter arbor comprises a first cutter arbor shaft section, a second cutter arbor shaft section and a spring, wherein the left end face of the first cutter arbor shaft section is provided with a counter bore, a first end sleeve of the spring is arranged at the head of the screw, a second end of the spring is arranged in the counter bore, and the axis of the screw and the axis of the counter bore coincide with the axis of the mounting hole.

Further, a tool clamping groove shoulder is arranged on the outer side of the tool shank body, the module support is of an annular structure, and the module support is clamped on the tool shank body on the right side of the tool clamping groove shoulder; the left end surface of the module support is in contact with the right side surface of the shoulder of the clamping groove.

Furthermore, the tool clamping groove shoulder is positioned on the outer side of the blind hole, a V-shaped ring groove is arranged on the outer ring surface of the tool clamping groove shoulder, and the process holes comprise a first process hole and a second process hole;

the first process hole is perpendicular to the axis of the blind hole, the first end of the first process hole is communicated with the blind hole, the second end of the first process hole is positioned at the bottom of the V-shaped ring groove, the first end of the second process hole is positioned on the right end surface of the tool clamping groove shoulder, and the second end of the second process hole is communicated with the middle of the first process hole; after a signal wiring of the piezoelectric ceramic block penetrates through the first end of the first fabrication hole, the signal wiring penetrates out of the first end of the second fabrication hole and is connected with the signal conversion and transmission module; and the second end of the first fabrication hole is blocked by a plug.

Further, when the self-excited vibration drilling tool holder device drills a small-diameter deep hole in a self-excited vibration mode, a modal equation formula is as follows:

parameters (m, c, k) in a modal equation formula are determined by a self-excited vibration drilling tool holder device, a tool bar, a vibration body A consisting of an observation ring, a spring chuck, a nut and a twist drill are arranged on the tool bar, m represents the mass of the vibration body A, c represents the damping between the vibration body A and the tool holder body, k represents the rigidity of the spring, t represents time, and Z (t) represents the instantaneous axial position of the vibration body A;

the dynamic drill thrust F on the right side of the formula is determined by workpiece materials, cutting parameters, twist drill materials and structural geometric parameters of the twist drill, the cutting parameters comprise the rotating speed and the feeding amount of the twist drill, a stable state domain graph capable of generating stable self-excited vibration when a deep hole with a specific diameter of a specific material is drilled can be obtained through deduction calculation of a modal equation formula, the rotating speed of the twist drill and the rigidity k of the spring can be initially selected from the stable state domain graph, and then the proper spring and the rotating speed of the twist drill are selected during drilling operation.

Has the advantages that:

1. the invention designs the cutter handle into a structure containing a weak rigid element (spring), adjusts the regenerative vibration during cutting into the periodic continuous vibration of the cutter rod relative to the cutter handle with a certain rule, forms a self-excited vibration cutting method with a specific rule, and can convert the harmful regenerative vibration into the vibration beneficial to cutting processing. The self-excited vibration is applied to the small-diameter deep hole machining, so that the machining efficiency can be improved, and the use cost can be reduced.

2. The voltage signal of the piezoelectric ceramic block is transmitted to the signal conversion transmission module through the signal wiring, and then is converted into a wireless signal to be output, and the lower computer receives the wireless signal, so that the function of monitoring the vibration state of the self-excited vibration drilling in real time is realized.

3. The invention is provided with the observation ring, and can intuitively and preliminarily judge whether the self-excited vibration occurs during drilling or not through the position change of the observation ring relative to the cutter handle body.

4. According to the invention, before drilling, the rigidity requirement of the spring and the rotating speed of the twist drill can be calculated according to the workpiece material and the hole size to be drilled through a modal equation formula, and then the proper spring and the rotating speed of the twist drill are selected during drilling operation, so that the drilling efficiency is improved.

5. The axis of the screw and the axis of the counter bore coincide with the axis of the mounting hole, so that the axis of the spring is always positioned on the same line with the axial direction of the mounting hole, and the influence on the monitoring result caused by the change of the stress point of the piezoelectric ceramic block due to the axis deviation of the spring is avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the tool shank of the present invention;

FIG. 3 is a schematic view of the structure of a vibrator A according to the present invention;

reference numbers in the figures: 1. a knife handle body; 2. a plug; 3. signal wiring; 4. a signal conversion transmission module; 5. a piezoelectric ceramic block; 6. a gasket; 7. a module support; 8. a screw; 9. a spring; 101. a first cutter bar shaft section; 102. a second cutter bar shaft section; 11. an observation loop; 12. adjusting a screw cap; 13. locking a screw cap; 14. a first threaded hole; 15. a nut; 16. a twist drill; 17. blind holes; 18. a splined bore; 19. a second threaded hole; 20. a spring collet.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.

As shown in fig. 1 and 3, a self-excited vibration drilling tool holder device comprises a tool holder body 1 and a tool bar, wherein a mounting hole is arranged in the tool holder body 1, an opening of the mounting hole is located on the right end face of the tool holder body 1, the mounting hole sequentially comprises a second threaded hole 19, a blind hole 17, a spline hole 18 and a first threaded hole 14 which are coaxially arranged from left to right, and the hole diameters of the second threaded hole 19, the blind hole 17, the spline hole 18 and the first threaded hole 14 are sequentially increased.

The cutter bar is arranged in the mounting hole, and a locking screw cap 13 and an adjusting screw cap 12 are arranged in the first threaded hole 14; the cutter bar is a hollow stepped shaft and comprises a first cutter bar shaft section 101 and a second cutter bar shaft section 102, and the diameter of the first cutter bar shaft section 101 is larger than that of the second cutter bar shaft section 102; the right end of the second cutter bar 102 is connected with the tail part of the twist drill 16, and the inner holes of the locking screw cap 13 and the adjusting screw cap 12 are in clearance fit with the second cutter bar 102; the first tool bar shaft section 101 is matched with the splined hole 18 through a spline, and the tool bar can move along the axial direction of the mounting hole.

The left side surface of the adjusting screw cap 12 is in contact with the right end surface of the first cutter arbor section 101, and the right side surface of the adjusting screw cap 12 is in contact with the locking screw cap 13. The adjusting screw cap 12 is used for adjusting the initial axial position of the cutter bar.

A piezoelectric ceramic block 5 is arranged at the bottom of the blind hole 17, a spring 9 is arranged between the piezoelectric ceramic block 5 and the first cutter bar shaft section 101, a gasket 6 is further arranged between the piezoelectric ceramic block 5 and the spring 9, one side of the gasket 6 is in contact with the piezoelectric ceramic block 5, and the other side of the gasket 6 is in contact with the spring 9;

the piezoelectric ceramic block 5 and the gasket 6 are fixed on the bottom surface of the blind hole 17 through screws 8, and the screws 8 penetrate through the through holes on the gasket 6 and the piezoelectric ceramic block 5 and are connected with the second threaded holes 19; a counter bore is arranged on the left end face of the first cutter arbor section 101, a first end of the spring 9 is sleeved on the head of the screw 8, and a second end of the spring 9 is arranged in the counter bore. The axis of the screw 8 and the counter bore is coincident with the axis of the mounting hole.

And a module bracket 7 is arranged on the outer side of the knife handle body 1. The module bracket 7 is provided with a signal conversion transmission module 4; and a signal wiring 3 of the piezoelectric ceramic block 5 passes through a process hole on the cutter handle body 1 and is connected with the signal conversion and transmission module 4.

The outer side of the tool shank body 1 is provided with a tool clamping groove shoulder, the outer ring surface of the tool clamping groove shoulder is provided with a V-shaped ring groove, the module support 7 is of an annular structure, and the module support 7 is clamped on the tool shank body 1 on the right side of the tool clamping groove shoulder; the left end face of the module support 7 is in contact with the right side face of the bayonet groove shoulder. The tool clamping groove shoulder is positioned on the outer side of the blind hole 17, and the process holes comprise a first process hole and a second process hole; the first process hole is perpendicular to the axis of the blind hole 17, the first end of the first process hole is communicated with the blind hole 17, the second end of the first process hole is positioned at the bottom of the V-shaped ring groove, the first end of the second process hole is positioned on the right end surface of the tool clamping groove shoulder, and the second end of the second process hole is communicated with the middle of the first process hole; after the signal wiring 3 of the piezoelectric ceramic block 5 penetrates through the first end of the first fabrication hole, the signal wiring penetrates out of the first end of the second fabrication hole and is connected with the signal conversion transmission module 4; and the second end of the first fabrication hole is blocked by a plug 2.

The right-hand member cover of the handle body 1 is equipped with observation ring 11, observation ring 11 is the tubular structure, the right-hand member of observation ring 11 is the closed end face of taking central screw hole, the closed end face with second cutter arbor shaft segment 102 threaded connection, the medial surface of observation ring 11 and the left surface of closed end face do not contact all the time with the handle body 1. A spring chuck 20 is arranged at the right end of the second cutter bar shaft section 102; the tail part of the twist drill 16 is arranged in the spring chuck 20 and is fixed by a nut 15 at the outer side of the spring chuck 20; the right side of the closed end face of the observation ring 11 is in contact with the nut 15.

The taper shank of the tool shank body 1 adopts the BT40 standard, and can be suitable for any machine tool with a main shaft with a BT40 interface, and can be used for vertical drilling and horizontal drilling.

The adjusting screw cap is used for adjusting the initial axial position of the cutter bar, and on one hand, the position from the tip of the twist drill to the installation reference of the cutter handle is adjusted; on the other hand, a certain pretightening force is applied to the spring, and the initial drilling thrust is improved.

The axis of the screw and the axis of the counter bore coincide with the axis of the mounting hole, so that the axis of the spring is always positioned on the same line with the axial direction of the mounting hole, and the influence on the monitoring result caused by the change of the stress point of the piezoelectric ceramic block due to the axis deviation of the spring is avoided.

When the device of the invention is used for drilling small-diameter deep holes by self-excited vibration, the modal equation is as follows:

the parameters (m, c, k) on the left side of the modal equation formula are determined by the device, the cutter bar and the vibrating body A consisting of the observation ring, the spring chuck, the nut and the twist drill are arranged on the cutter bar, m represents the mass of the vibrating body A, c represents the damping between the vibrating body A and the cutter handle body, k represents the rigidity of the spring, t represents time, and Z (t) represents the instantaneous axial position of the vibrating body A.

The dynamic drill thrust F on the right side of the formula is determined by workpiece materials, cutting parameters, twist drill materials and structural geometric parameters of the twist drill, the cutting parameters comprise the rotating speed and the feeding amount of the twist drill, a stable state domain graph capable of generating stable self-excited vibration when a deep hole with a specific diameter of a specific material is drilled can be obtained through deduction calculation of the modal equation formula, the rotating speed of the twist drill and the rigidity k of a spring in the self-excited vibration drilling tool holder device can be initially selected from the stable state domain graph, and then the proper spring and the rotating speed of the twist drill are selected during drilling operation.

When the device disclosed by the invention is used for drilling a small-diameter deep hole by self-excited vibration, the cutter bar, the observation ring, the spring chuck, the nut and the vibrating body A formed by the twist drill are arranged on the cutter bar, and the spring is compressed under the action of the drill thrust in the process from the contact of the twist drill with the surface of a workpiece to the complete drilling of two main cutting edges of the twist drill into the workpiece, and the right end face of the first cutter bar is gradually separated from the left side face of the adjusting screw cap. At the moment, the vibrating body A is in a dynamic balance state under the action of drilling thrust and spring force. When the necessary disturbances in the borehole break this balance, the vibration body a vibrates, producing a corrugated surface with a certain regularity on the drilled cutting surface. Under the condition of the selected rotating speed, a specific phase difference exists between the corrugated surface generated by the last cutting and the corrugated surface generated by the previous cutting, so that the regular interrupted cutting is generated. The intermittent cutting enables the vibration of the vibrator A to become more orderly, and self-excited vibration drilling is formed until the requirement of the drilling depth is met. Because the orderly vibration of pendulum A for the effort that pendulum A acted on the spring also has regularity, and the spring passes through the gasket with regular effort and acts on the piezoceramics piece, makes the voltage signal of piezoceramics piece output demonstrate specific law, and the voltage signal of piezoceramics piece transmits signal conversion transmission module through the signal connection, then converts the wireless signal output into, and the next machine accepts wireless signal, realizes the function of real-time supervision self-excited vibration drilling's vibration state. In addition, whether self-excited vibration occurs during drilling can be preliminarily judged by observing the position change of the ring relative to the cutter handle body.

As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.