An ultrasonic blade having a multi-mode configuration

Abstract

The utility model discloses a kind of multi-mode ultrasonic tool bit structures, including cooperatively installed shank, vibration structure and tool bit assembly, the shank is equipped with inner cavity one, the vibration structure includes the transducer assembly being set in inner cavity one and the magnetic core assembly being sleeved in shank outside, the transducer assembly includes locking screw, rear pressing plate, bending vibration piezoelectric ceramic, longitudinal vibration piezoelectric ceramic and amplitude-varying rod, locking screw is connected with amplitude-varying rod, and rear pressing plate and amplitude-varying rod press tightly fixed bending vibration piezoelectric ceramic and longitudinal vibration piezoelectric ceramic.The utility model can drive bending vibration piezoelectric ceramic alone, realize plane grinding, better row cut and surface quality drive longitudinal vibration piezoelectric ceramic alone, to pure longitudinal vibration mode vibration type to punch, can simultaneously drive bending vibration piezoelectric ceramic and longitudinal vibration piezoelectric ceramic, let tool tip produce elliptical vibration track, realize better scraping surface, by controlling different vibration type piezoelectric wafer, the different vibration type of amplitude-varying rod is realized.

Description

Technical Field

[0001] This utility model relates to the field of precision machining technology, specifically to an ultrasonic cutter head structure with multiple vibration modes. Background Technology

[0002] Existing ultrasonic cutter heads are mostly longitudinally vibrating ultrasonic cutter holders driven by longitudinally vibrating piezoelectric wafers, or they convert longitudinal vibration into longitudinal torsional vibration by machining a structural groove on the amplitude transformer. These methods have a single vibration mode; for example, a single longitudinally vibrating ultrasonic cutter holder is highly effective for drilling, but its advantages are not significant enough for scraping or surface grinding. Therefore, a multi-mode ultrasonic cutter head structure is being developed. Utility Model Content

[0003] The purpose of this invention is to provide an ultrasonic cutter head structure with multiple vibration modes, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an ultrasonic cutter head structure with multiple vibration modes, comprising a cutter handle, a vibration structure, and a cutter head assembly that are fitted together. The cutter handle has an inner cavity. The vibration structure includes a transducer assembly disposed within the inner cavity and a magnetic core assembly sleeved on the outside of the cutter handle. The transducer assembly includes a locking screw, a rear pressure plate, a bending piezoelectric ceramic, a longitudinal piezoelectric ceramic, and an amplitude transformer. The locking screw is connected to the amplitude transformer, and the rear pressure plate and the amplitude transformer press and fix the bending piezoelectric ceramic and the longitudinal piezoelectric ceramic.

[0005] Preferably, the rear pressure plate has a through hole one, the rear pressure plate has a semi-circular portion, the bending vibration piezoelectric ceramic is semi-circular in shape, and the semi-circular portion fits into the bending vibration piezoelectric ceramic, and a through hole two is left between the semi-circular portion and the bending vibration piezoelectric ceramic, the longitudinal vibration piezoelectric ceramic has a through hole three, the top of the amplitude transformer has a threaded hole adapted to the locking screw, the threaded end of the locking screw passes through the through hole one, the through hole two and the through hole three in sequence and is threadedly connected to the threaded hole, and the clamping end of the locking screw clamps and fixes the rear pressure plate, the bending vibration piezoelectric ceramic and the longitudinal vibration piezoelectric ceramic with the amplitude transformer.

[0006] Preferably, there are two of each of the bending vibration piezoelectric ceramics and the longitudinal vibration piezoelectric ceramics.

[0007] Preferably, the longitudinally vibrating piezoelectric ceramic is in the shape of a ring.

[0008] Preferably, the magnetic core assembly includes a secondary magnetic core sleeved on the outer circumference of the tool holder and a positive magnetic core disposed on the secondary magnetic core, and the positive magnetic core is in the shape of an "E".

[0009] Preferably, the secondary side magnetic core includes two magnetic core parts one which are fitted together vertically. The magnetic core part one is in an annular shape, and an annular groove is provided on the circumferential end surface of the magnetic core part one. A coil one is wound around the annular groove, and the coil one is electrically connected to the longitudinal vibration piezoelectric ceramic.

[0010] Preferably, the primary side magnetic core includes two magnetic core parts two which are fitted together vertically. The magnetic core part two is in a "C" shape, and the open end of the magnetic core part two faces the secondary side magnetic core. A coil two is wound around each magnetic core part two, and the coil two is electrically connected to the bending vibration piezoelectric ceramic.

[0011] Preferably, the tool head assembly includes a compression cap and an elastic collet. A sleeve part is provided at the bottom of the amplitude transformer rod, and an inner cavity two extending from the bottom surface of the amplitude transformer rod to the upper end is provided on the sleeve part. Among them, the elastic collet is located in the inner cavity two, and the compression cap is sleeved on the circumferential outer side of the sleeve part.

[0012] Preferably, an installation part is provided at the upper end of the tool handle. The installation part is in the shape of a frustum of a cone with a smaller upper end and a larger lower end. A socket counter bore extending from the top end of the installation part downward is provided on the installation part. The socket counter bore is a "T" - shaped counter bore, and an annular clamping groove is also provided on the tool handle.

[0013] Preferably, the tool head assembly is used for installing a tool.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The present utility model is provided with a semi - circular bending vibration piezoelectric ceramic and a longitudinal vibration piezoelectric ceramic. The bending vibration piezoelectric ceramic can be driven alone to achieve surface grinding, better chip removal and surface quality. The longitudinal vibration piezoelectric ceramic can be driven alone to drill holes in a pure longitudinal vibration mode. The bending vibration piezoelectric ceramic and the longitudinal vibration piezoelectric ceramic can be driven simultaneously to make the tool tip generate an elliptical vibration trajectory, achieving better scraping of the surface. By controlling the piezoelectric wafers of different vibration modes, different vibration modes of the amplitude transformer rod are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is an exploded schematic structural diagram of the present invention;

[0018] Figure 3 is a cross - sectional view of the present invention;

[0019] Figure 4 is a partial exploded schematic structure of the present invention Figure 1 ;

[0020] Figure 5 is a partial exploded schematic structure of the present invention Figure 2 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "horizontal," "vertical," "top," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Please see Figures 1 to 5 The present invention provides an embodiment of an ultrasonic blade head structure with multiple vibration modes, comprising a blade holder 10, a magnetic core assembly 20, a transducer assembly 30, and a blade head assembly 40.

[0024] The tool holder 10 has an inner cavity 11, in which the transducer assembly 30 is sleeved and installed in the inner cavity 11;

[0025] The transducer assembly 30 includes a locking screw 31, a rear pressure plate 32, two bending piezoelectric ceramics 33, two longitudinal piezoelectric ceramics 34, and an amplitude transformer 35. The rear pressure plate 32 has a through hole 36 and a semi-circular portion 37 integrally connected to it. The bending piezoelectric ceramics 33 are semi-circular in shape, and the semi-circular portion 37 and the bending piezoelectric ceramics 33 are fitted together to form a ring. A through hole 38 is left between the semi-circular portion 37 and the bending piezoelectric ceramics 33. The longitudinal piezoelectric ceramics... 34 is in the shape of a ring, and the longitudinal vibration piezoelectric ceramic 34 has a through hole 39. The top of the amplitude rod 35 is provided with a threaded hole 351 that matches the locking screw 31. The threaded end of the locking screw 31 passes through the first through hole 36, two second through holes 38 and two third through holes 39 in sequence and is threadedly connected to the threaded hole 351. After the clamping end of the locking screw 31 is clamped and fixed with the amplitude rod 35, the pressure plate 32, the bending vibration piezoelectric ceramic 33 and the longitudinal vibration piezoelectric ceramic 34 are assembled, and the transducer assembly 30 is completed.

[0026] The magnetic core assembly 40 is sleeved on the tool shank 10. The magnetic core assembly 40 includes a secondary side magnetic core 41 sleeved on the outer circumference of the tool shank and a primary side magnetic core 42 arranged on the secondary side magnetic core 41, and the primary side magnetic core 42 is in an "E" shape; the transducer assembly 30 corresponds to the magnetic core assembly 40 in position. The magnetic core assembly 40 and the transducer assembly 30 are connected to form a vibration structure. The flexural vibration piezoelectric ceramics 33 and longitudinal vibration piezoelectric ceramics 34 in the transducer assembly 30 are connected to a power supply through the magnetic core assembly 40, and the flexural vibration piezoelectric ceramics 33 and longitudinal vibration piezoelectric ceramics 34 achieve vibration frequency actions.

[0027] Among them, the secondary side magnetic core 41 includes two magnetic core parts one 43 that are fitted together up and down, and the two magnetic core parts one 43 are sleeved on the tool shank 10. The magnetic core part one 43 is in an annular shape, and an annular groove 44 is provided on the circumferential end surface of the magnetic core part one 43. A coil one 45 is wound around the annular groove 44. The two coils one 45 are respectively connected to the two longitudinal vibration piezoelectric ceramics 34. Each group of coils one 45 can independently drive the corresponding longitudinal vibration piezoelectric ceramics 34 to achieve longitudinal vibration actions and transmit them to the tool head assembly 50 through the amplitude transformer 35.

[0028] And the two groups of coils one 45 are set with different numbers of turns, and different turns ratio coils are used to achieve a wider power output range.

[0029] In this embodiment, the thickness of the longitudinal vibration piezoelectric ceramics 34 is 16 mm.

[0030] The primary side magnetic core 42 includes two magnetic core parts two 46 that are fitted together up and down. The magnetic core part two 46 is in a "匚" shape, and the open end of the magnetic core part two 46 faces the secondary side magnetic core 41. A coil two 47 is wound around each magnetic core part two 46. The two coils two 47 are respectively connected to the two flexural vibration piezoelectric ceramics 34. Each group of coils two 46 can independently drive the corresponding flexural vibration piezoelectric ceramics 34 to achieve flexural vibration actions.

[0031] The two groups of coils two 47 are set with different numbers of turns, and different turns ratio coils are used to achieve a wider power output range.

[0032] The tool head assembly 50 is used to install the tool 60. The tool head assembly 50 includes a compression cap 51 and an elastic chuck 52. The bottom of the amplitude transformer 35 is provided with a sleeve part 352, and an inner cavity two 353 extending from the bottom surface of the amplitude transformer upward is provided on the sleeve part 352. Among them, the elastic chuck 52 is located in the inner cavity two 353, and the tool 60 is clamped in the middle of the elastic chuck 52. The compression cap 51 is sleeved on the outer circumference of the sleeve part 352, so that the elastic chuck 52 has a force to squeeze toward the center, achieving the effect of clamping and fixing the tool 60.

[0033] The tool holder 10 has a mounting part 12 at the upper end. The mounting part 12 is a truncated cone shape with a smaller upper end and a larger lower end. The mounting part 12 has a countersunk hole 13 extending downward from the top of the mounting part 12. The countersunk hole 13 is a "T"-shaped countersunk hole. The tool holder 10 is also provided with an annular locking groove 14. The above structure is a standard ISO20 tool head interface, which is used to connect with the spindle of the corresponding machine tool.

[0034] The secondary magnetic core 41 is provided with protective pads 48 at both the top and bottom ends. When the cutter head is being installed or the machine is being installed, it may collide with the secondary magnetic core 41. The protective pads 48 effectively prevent the collision from damaging the secondary magnetic core 41.

[0035] When using an ultrasonic drill head for drilling, the longitudinally vibrating piezoelectric ceramic 34 is controlled by coil 45, so that the drill 60 can drill with a pure longitudinal vibration mode.

[0036] During scraping, the longitudinally vibrating piezoelectric ceramic 34 and the bending vibrating piezoelectric ceramic 33 are driven simultaneously by coil 1 45 and coil 2 47, and the tip of the tool 60 generates an elliptical vibration trajectory, achieving a better scraping surface. It can also be applied in the field of colorful scraping to achieve a better grating structure.

[0037] During surface grinding, the bending vibration piezoelectric ceramic 33 can be controlled independently by coil 2 47, and the pure bending vibration mode can achieve better chip removal and surface quality.

[0038] The two sets of coil 1 45 and the two sets of coil 2 47 can realize the individual control of the two longitudinal vibration piezoelectric ceramics 34 and the two bending vibration piezoelectric ceramics 33, while the two sets of coil 1 45 and the two sets of coil 2 47 can be combined in various ways to achieve diversified control methods.

[0039] The two sets of coil 1 (45) and the two sets of coil 2 (47) are used in combination, and by switching between different turns ratios, the ultrasonic cutter head can achieve a wider power output range by matching different turns ratio coils.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An ultrasonic blade head configuration having multiple modes of vibration comprising a matingly mounted shank, a vibrating structure, and a blade head assembly, characterized by: The tool shank is provided with a first inner cavity. The vibration structure includes a transducer assembly disposed in the first inner cavity and a magnetic core assembly sleeved outside the tool shank. The transducer assembly includes a locking screw, a rear pressing plate, a bending vibration piezoelectric ceramic, a longitudinal vibration piezoelectric ceramic, and a horn. The locking screw is cooperatively connected with the horn, and the rear pressing plate and the horn clamp and fix the bending vibration piezoelectric ceramic and the longitudinal vibration piezoelectric ceramic.

2. A multi-mode ultrasonic surgical blade according to claim 1, wherein: The rear pressing plate is provided with a first through hole. The rear pressing plate has a semi-circular portion. The bending vibration piezoelectric ceramic is semi-circular in shape, and the semi-circular portion is in mutual contact with the bending vibration piezoelectric ceramic. A second through hole is left between the semi-circular portion and the bending vibration piezoelectric ceramic. The longitudinal vibration piezoelectric ceramic is provided with a third through hole. The top of the horn is provided with a threaded hole adapted to the locking screw. The threaded end of the locking screw sequentially passes through the first through hole, the second through hole, and the third through hole and is threadedly connected to the threaded hole. The pressing end of the locking screw clamps and fixes the rear pressing plate, the bending vibration piezoelectric ceramic, and the longitudinal vibration piezoelectric ceramic with the horn.

3. A multi-mode ultrasonic surgical blade according to either of Claims 1 or 2, wherein: There are two bending vibration piezoelectric ceramics and two longitudinal vibration piezoelectric ceramics respectively.

4. A multi-mode ultrasonic surgical blade according to either of Claims 1 or 2, wherein: The longitudinal vibration piezoelectric ceramic is in an annular shape.

5. A multi-mode ultrasonic surgical blade according to claim 1, wherein: The magnetic core assembly includes a secondary side magnetic core sleeved on the circumferential outer side of the tool shank and a primary side magnetic core disposed on the secondary side magnetic core, and the primary side magnetic core is in an "E" shape.

6. A multi-mode ultrasonic surgical blade according to claim 5, wherein: The secondary side magnetic core includes two magnetic core parts one that are mutually contacted up and down. The magnetic core part one is in an annular shape, and an annular groove is provided on the circumferential end surface of the magnetic core part one. A first coil is wound on the annular groove, and the first coil is electrically connected to the longitudinal vibration piezoelectric ceramic.

7. A multi-mode ultrasonic surgical blade according to claim 5, wherein: The primary side magnetic core includes two magnetic core parts two that are mutually contacted up and down. The magnetic core part two is in a "匚" shape, and the opening end of the magnetic core part two faces the secondary side magnetic core. A second coil is wound on each magnetic core part two, and the second coil is electrically connected to the bending vibration piezoelectric ceramic.

8. A multi-mode ultrasonic surgical blade according to claim 1, wherein: The tool head assembly includes a compression cap and an elastic chuck. The bottom of the horn is provided with a sleeve portion. An inner cavity two extending upward from the bottom surface of the horn is provided on the sleeve portion. Among them, the elastic chuck is located in the inner cavity two, and the compression cap is sleeved on the circumferential outer side of the sleeve portion.

9. The ultrasonic cutter head structure with multiple vibration modes according to claim 1, characterized in that: The upper end of the tool shank is provided with a mounting portion. The mounting portion is in a frustum shape with a smaller upper end and a larger lower end. A socket counter bore extending downward from the top end of the mounting portion is provided on the mounting portion. The socket counter bore is a "T" shaped counter bore, and an annular clamping groove is further provided on the tool shank.

10. An ultrasonic cutter head structure with multiple vibration modes according to any one of claims 1 or 8, characterized in that: The tool head assembly is used for installing a tool.

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