CN110394463B - Ultrasonic spindle and ultrasonic machine tool comprising same - Google Patents
Ultrasonic spindle and ultrasonic machine tool comprising same Download PDFInfo
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- CN110394463B CN110394463B CN201910825419.3A CN201910825419A CN110394463B CN 110394463 B CN110394463 B CN 110394463B CN 201910825419 A CN201910825419 A CN 201910825419A CN 110394463 B CN110394463 B CN 110394463B
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- 239000004020 conductor Substances 0.000 claims description 41
- 210000000078 claw Anatomy 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007142 ring opening reaction Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 238000012545 processing Methods 0.000 abstract description 11
- 238000005299 abrasion Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 description 10
- 238000003754 machining Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to the technical field of ultrasonic processing, and discloses an ultrasonic spindle, which is characterized in that on one hand, a wireless transmitting assembly and a wireless receiving assembly are arranged on the ultrasonic spindle, so that non-contact electric conduction is formed between a rotating shaft and a cylinder seat, abrasion of a conductive structure can be avoided, the service life of the spindle is prolonged, and the cutting operation effect of high-frequency vibration is improved; on the other hand, because the conductive pieces are all concentrated on the rod body, double alignment is converted into single alignment, and alignment difficulty is greatly reduced, therefore, in the sleeving process of the ultrasonic knife handle and the rotating shaft, the rod body and the blind rivet are only required to be abutted, effective electric connection can be formed between the conductive pieces and the conductive bodies, and further, stable electric conduction can be formed between the ultrasonic knife handle and the rotating shaft, and poor contact is avoided. In addition, the invention also provides an ultrasonic machine tool which has the advantages of stable electrical conduction, good processing effect and the like.
Description
Technical Field
The invention relates to the technical field of ultrasonic machining, in particular to an ultrasonic spindle and an ultrasonic machine tool comprising the same.
Background
The high-frequency vibration machining mechanism is introduced in the process of machining operation, so that the surface roughness of a machined surface can be improved, the machining precision can be improved, the cutting resistance can be reduced, and the service life of a cutter can be prolonged, and the high-frequency vibration machining mechanism is gradually widely applied.
The existing ultrasonic main shaft is generally composed of a base body, a rotating shaft and an ultrasonic tool handle, wherein the rotating shaft is erected in the base body, a sleeve hole is formed in the lower end of the rotating shaft, a power connector is arranged in the sleeve hole, and the power connector is electrically connected with an external power supply through a bearing or a carbon brush between the rotating shaft and the base body. The power connector is provided with a first conductive element in a thick pipe shape, and a second conductive element in a thin pipe shape is arranged in the first conductive element in an insulating manner. The ultrasonic knife handle is provided with a conical insertion part outside for being inserted in a sleeve hole of the rotating shaft, an oscillator is arranged inside the ultrasonic knife handle, a power plug electrically connected with the oscillator circuit is arranged at the upper end of the ultrasonic knife handle, a first electrode corresponding to the first conductive element is arranged on the power plug, and a second electrode corresponding to the second conductive element is arranged in the first electrode. When the ultrasonic knife handle is inserted into the sleeve hole of the rotating shaft, the first electrode of the power plug is sleeved on the outer ring surface of the first conductive element of the power connector, and the second electrode is inserted into the second conductive element, so that the power connector is electrically connected with the power plug; the external power supply outputs current and is conducted to the oscillator of the ultrasonic knife handle through the power supply lead set, the power supply connector and the power supply plug so as to drive the ultrasonic knife handle to vibrate at high frequency.
The disadvantage of the above structure is:
1. The inner ring and the outer ring of the bearing are provided with assembly gaps with the steel balls, so that when the inner ring and the steel balls rotate along with a rotating shaft at a high speed, centrifugal force generated by the inner ring and the steel balls or run-out generated during cutting processing is extremely easy to enable the inner ring and the steel balls to be separated from contact, and further, the situation of instant breaking occurs, so that a cutter cannot stably vibrate at a high frequency, and the cutting operation effect of the high frequency vibration is affected.
2. For the carbon brush structure, because the elastic member provides the elastic force to push each carbon brush member to move towards the main shaft, if the compression amount of the elastic member is too large, the pushing elastic force is relatively increased, so that the abrasion of the carbon brush member is serious; on the contrary, if the compression amount of the elastic member is too small, the pushing elastic force is insufficient, so that the carbon brush member cannot contact the conductive ring, and even the situation of disconnection occurs.
3. When the inserting part of the ultrasonic knife handle is not completely inserted and positioned in the registering hole of the rotating shaft, the first electrode and the second electrode of the power plug of the ultrasonic knife handle are opposite to the first conductive element and the second conductive element of the power connector, and therefore, when the first electrode and the second electrode of the power plug are inserted and connected with the first conductive element and the second conductive element of the power connector in advance, the power plug or the power connector is easy to be damaged.
4. The second conductive element of the power connector and the second electrode of the power plug are quite sharp, so that the second electrode of the power plug and the second conductive element of the power connector must be aligned more accurately in the plugging process, and if the positions of the second electrode and the second conductive element deviate slightly, the second electrode or the second conductive element is extremely easy to damage due to abrasion or bending.
In summary, the conventional conductive structure of the ultrasonic spindle has a low service life, and the power supply cannot stably transmit electric energy to the oscillator of the tool holder, so that the cutting operation effect is poor.
Disclosure of Invention
The invention aims to provide an ultrasonic spindle which has long service life, stable electrical conduction, high safety and good processing effect, and can meet the requirement of high rotating speed.
In order to achieve the above object, the present invention provides an ultrasonic spindle comprising:
The cylinder seat is internally provided with a wireless transmitting assembly;
the rotary shaft penetrates through the cylinder seat and is connected with the cylinder seat through a bearing, a wireless receiving assembly is arranged on the rotary shaft, the wireless receiving assembly and the wireless transmitting assembly are arranged oppositely at intervals, a cavity channel is arranged in the rotary shaft, and a sleeve hole communicated with the cavity channel is formed in the front end of the rotary shaft;
the pull rod is arranged in the cavity and can slide along the cavity, and the front end of the pull rod is provided with a claw seat;
the clamping jaw is connected with the pull rod through the jaw seat and can slide along with the pull rod;
The conductive assembly comprises a rod body, a first conductive piece and a second conductive piece, wherein the first conductive piece and the second conductive piece are arranged on the rod body and are insulated from each other, the rod body is fixed at the front end of the pull rod, the first conductive piece is electrically connected with the coil of the wireless receiving assembly through a wire, and the second conductive piece is electrically connected with the coil of the wireless receiving assembly through a wire;
The ultrasonic knife handle comprises a knife handle body, a rivet, an amplitude transformer and a vibrator, wherein the knife handle body can be sleeved with the rotating shaft through the sleeve hole, a mounting groove is formed in the rear end of the knife handle body, the rivet is fixedly connected with the knife handle body through the mounting groove, the rivet is connected with or disconnected from the clamping jaw, a connecting groove is formed in the front end of the knife handle body, the amplitude transformer is fixedly connected with the knife handle body through the connecting groove, the vibrator is fixed on the amplitude transformer, a first conductor and a second conductor which are mutually insulated are further arranged at the rear end of the rivet, the first conductor is electrically connected with a first electrode of the vibrator through a wire, and the second conductor is electrically connected with a second electrode of the vibrator through a wire.
Preferably, a groove is formed in the rear end of the blind rivet, and the first conductor and the second conductor are arranged in the groove.
Preferably, the front end of the rod body extends into the groove, and the first conductive member is electrically connected with the first conductive body, and the second conductive member is electrically connected with the second conductive body.
Preferably, an insulating ring is arranged in the groove, the first conductor and the second conductor are arranged in the insulating ring, and the front end of the rod body is inserted into the ring opening of the insulating ring.
Preferably, the rear end of the blind rivet protrudes backward from the rear end face of the insulating ring.
Preferably, a sealing ring is arranged between the rod body and the insulating ring.
Preferably, the first conductor is provided with a first elastic contact for forming electric connection after contacting with the first conductor;
the second conductor is provided with a second elastic contact for forming electric connection after being contacted with the second conductor.
Preferably, the pull rod is provided with a first through hole, and the wire connecting the first conductive member and the coil of the wireless receiving assembly and the wire connecting the second conductive member and the coil of the wireless receiving assembly pass through the first through hole.
Preferably, the first hole penetrates through two ends of the pull rod.
Preferably, the blind rivet is provided with a second through hole, and a wire for connecting the first conductor and the first electrode of the vibrator and a wire for connecting the second conductor and the second electrode of the vibrator pass through the second through hole.
Preferably, the second hole penetrates through two ends of the blind rivet.
Preferably, a tool retracting cavity is arranged between the cavity channel and the trepanning.
Preferably, the vibrator is fixed at the rear end of the amplitude transformer, the cutter handle body is provided with a wire passing hole for communicating the connecting groove with the mounting groove, a wire for connecting the first conductor with the first electrode of the vibrator, and a wire for connecting the second conductor with the second electrode of the vibrator pass through the wire passing hole.
As a preferred scheme, the first conductive piece is embedded in the rod body, one end of the first conductive piece is exposed out of the rear end of the rod body and is connected with a wire connected with the coil of the wireless receiving assembly, and the other end of the first conductive piece is exposed out of the outer side wall of the rod body and is used for forming electric connection after being contacted with the first conductive body; and/or
As a preferred scheme, the second conductive piece is embedded in the rod body, one end of the second conductive piece is exposed out of the rear end of the rod body and is connected with a wire connected with the coil of the wireless receiving assembly, and the other end of the second conductive piece is exposed out of the outer side wall of the rod body and is used for being electrically connected with the second conductive body after being contacted.
Preferably, the first conductive member is a conductive circular tube, and the second conductive member is a conductive circular tube.
As a preferable scheme, the conductive assembly further comprises a collar, a flange is arranged on the outer side face, close to the rear end, of the rod body, the collar is sleeved on the outer portion of the rod body and tightly presses the flange, a sinking groove is formed in the front end of the pull rod, and the collar is fixed in the sinking groove.
Preferably, the outer side surface of the lantern ring is provided with threads, and the lantern ring is fixedly connected with the pull rod through the threads; or (b)
The lantern ring is welded with the pull rod.
Preferably, a sealing ring is arranged between the rod body and the lantern ring.
Preferably, the rod body is provided with through holes penetrating through two ends of the rod body.
Another object of the present invention is to provide an ultrasonic machine tool, which includes an ultrasonic power supply and the above ultrasonic spindle, wherein the ultrasonic power supply is electrically connected with the coil of the wireless transmitting assembly.
Compared with the prior art, the ultrasonic main shaft provided by the embodiment of the invention has the beneficial effects that:
On the one hand, the ultrasonic spindle provided by the invention can form non-contact electric conduction between the rotating shaft and the cylinder seat by arranging the wireless transmitting assembly on the cylinder seat and arranging the wireless receiving assembly on the rotating shaft, so that not only can the abrasion of a conductive structure be avoided, the service life of the spindle be prolonged, the cutting operation effect of high-frequency vibration be improved, the situation of instant disconnection caused by the deflection of the rotating shaft can be avoided, the stability of electric conduction is improved, the vibrator can stably obtain working current, but also the rotating speed of the rotating shaft can be greatly improved by the non-contact electric conduction, and the requirement of high rotating speed can be met.
On the other hand, the ultrasonic spindle provided by the invention can lead the contact electric connection part of the ultrasonic knife handle and the rotating shaft to be positioned in the ultrasonic knife handle or the rotating shaft instead of being exposed at the gap between the ultrasonic knife handle and the rotating shaft by arranging the conductive component on the pull rod and centralizing the first conductive body and the second conductive body at the rear end of the blind rivet, thereby avoiding the electric leakage phenomenon and eliminating the potential safety hazard; meanwhile, because two conductive pieces are concentrated on the same rod body, double alignment between the two conductive pieces and the two conductive bodies is converted into single alignment between the rod body and the blind rivet, and alignment difficulty is greatly reduced.
In addition, the invention also provides an ultrasonic machine tool, which adopts the ultrasonic spindle, so the ultrasonic machine tool also has the advantages of stable electrical conduction, good processing effect and the like.
Drawings
Fig. 1 is a schematic structural view of an ultrasonic spindle according to a first embodiment of the present invention;
FIG. 2 is a partial schematic view of region I of FIG. 1;
FIG. 3 is a schematic view of the structure of an ultrasonic spindle without an ultrasonic processing module according to the first embodiment of the present invention;
FIG. 4 is a schematic view of an ultrasonic processing assembly according to a first embodiment of the present invention;
Fig. 5 is a schematic structural diagram of an ultrasonic machine tool according to a second embodiment of the present invention.
In the figure: 100. an ultrasonic main shaft; 1. a cylinder seat; 2. a rotation shaft; 201. a cavity channel; 202. trepanning; 203. a retracting cavity; 3. a pull rod; 301. a claw seat; 302. a first duct; 303. sinking grooves; 4. a clamping jaw; 401. a claw arm; 5. a bearing; 6. a wireless transmitting assembly; 7. a wireless receiving component; 8. a conductive assembly; 801. a rod body; 802. a first conductive member; 803. a second conductive member; 804. a collar; 805. a second seal ring; 806. a through hole; 9. a cutter; 10. a shank body; 1001. a mounting groove; 1002. a connecting groove; 1003. a wire through hole; 11. pulling nails; 1102. a second orifice; 1103. a groove; 12. a horn; 1201. a connection hole; 13. a vibrator; 14. a collet; 15. a sealing nut; 16. a first conductor; 17. a second conductor; 18. an insulating ring; 19. a first seal ring; 200. an ultrasonic power supply.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, in the description of the present invention, the positional or positional relationship indicated by the terms such as "upper", "lower", "left", "right", "top", "bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present invention.
Also, it should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.
In the description of the present invention, "upper" in the expressions such as "on the rotation shaft", "on the horn", "on the rod body" include "inner", "outer", "upper", and "lower", etc. The terms "front end" and "rear end" refer to the end of the cutting tool that is closest to the work piece during use as the "front end" and the end that faces away from the work piece as the "rear end".
Example 1
As shown in fig. 1, an embodiment of the present invention provides an ultrasonic spindle 100, which mainly includes a cylinder base 1, a rotating shaft 2, a pull rod 3, a clamping jaw 4, and an ultrasonic processing assembly.
Specifically, as shown in fig. 1 to3, the cartridge 1 is a stationary member, and the rotary shaft 2 is disposed in the cartridge 1 and connected to the cartridge 1 through the bearing 5, whereby the rotary shaft 2 is rotatable relative to the cartridge 1. The rotating shaft 2 is internally provided with a cavity 201, and the pull rod 3 is arranged in the cavity 201 and can slide up and down along the cavity 201. The front end of the pull rod 3 is provided with a claw seat 301, and the clamping claw 4 is connected with the pull rod 3 through the claw seat 301 and can slide up and down along with the pull rod 3. The front end of the rotating shaft 2 is provided with a sleeve hole 202 communicated with a cavity 201, and a tool retracting cavity 203 is arranged between the sleeve hole 202 and the cavity 201. When the pull rod 3 slides downwards along the cavity channel 201, the clamping jaw 4 enters the tool retracting cavity 203 from the cavity channel 201 to open the clamping jaw arm 401; when the pull rod 3 slides up the channel 201, the clamping jaw 4 enters the channel 201 from the retracting cavity 203 to retract the clamping jaw arm 401.
Further, a wireless transmitting component 6 is arranged in the cylinder seat 1, a wireless receiving component 7 is arranged on the rotating shaft 2, and the wireless receiving component 7 and the wireless transmitting component 6 are arranged oppositely at intervals. The pull rod 3 is provided with a conductive component 8, the conductive component 8 comprises a rod body 801, a first conductive piece 802 and a second conductive piece 803, the first conductive piece 802 and the second conductive piece 803 are arranged on the rod body 801 and are insulated from each other, the rod body 801 is fixed at the front end of the pull rod 3, the first conductive piece 802 is electrically connected with a coil of the wireless receiving component 7 through a first wire, and the second conductive piece 803 is electrically connected with the coil of the wireless receiving component 7 through a second wire. Based on this, by being electrically connected to the power supply, the coil of the wireless transmitting assembly 6 can generate a stable induced magnetic field, and as the rotating shaft 2 rotates relative to the wireless transmitting assembly 6, the coil of the wireless receiving assembly 7 can generate an induced current by cutting the magnetic induction line, so that by using the electromagnetic induction principle, a non-contact electrical conduction is formed between the rotating shaft 2 and the cylinder base 1, and the first conductive member 802 and the second conductive member 803 are electrified.
Specifically, as shown in fig. 1,2 and 4, the ultrasonic processing assembly includes an ultrasonic tool shank and a cutter 9, wherein the ultrasonic tool shank further includes a tool shank body 10, a blind rivet 11, a horn 12 and a vibrator 13. The cutter handle body 10 can be sleeved with the rotary shaft 2 through the sleeve hole 202 so as to realize rotation along with the rotation of the rotary shaft 2; the rear end of the tool handle body 10 is provided with a mounting groove 1001, and the blind rivet 11 is fixedly connected with the tool handle body 10 through the mounting groove 1001, wherein the connection mode can be splicing or screw connection; the front end of the knife handle body 10 is provided with a connecting groove 1002, the amplitude transformer 12 is fixedly connected with the knife handle body 10 through the connecting groove 1002, and the connecting mode can be splicing or screwing; the vibrator 13 is fixed at the rear end of the amplitude transformer 12; the front end of the amplitude transformer 12 is provided with a conical connecting hole 1201, and the cutter 9 is spliced or screwed with the connecting hole 1201 through a collet 14 sleeved outside the cutter 9; in order to improve the stability of the connection between the cutter 9 and the ultrasonic shank, the latter further comprises a sealing nut 15, the sealing nut 15 being screwed onto the front end of the horn 12 and compressing the collet 14. It should be noted that the cutter 9 may be directly connected to the horn 12 through the connection hole 1201, or alternatively, the front end of the horn 12 is not provided with the connection hole 1201 and is tapered, the cutter 9 is provided with an assembly hole, and the cutter 9 is connected to the front end of the horn 12 through the assembly hole, which may be, of course, an insertion connection or a screw connection.
Further, the rear end of the pull pin 11 is further provided with a first conductor 16 and a second conductor 17 insulated from each other, the first conductor 16 is electrically connected to the first electrode of the vibrator 13 through a third wire, and the second conductor 17 is electrically connected to the second electrode of the vibrator 13 through a fourth wire.
Based on the above structure, when the handle body 10 is sleeved with the rotating shaft 2, the rear end of the blind rivet 11 stretches into the cavity 201, meanwhile, the first conductive piece 802 contacts with the first conductive body 16 and forms electrical connection, and the second conductive piece 803 contacts with the second conductive body 17 and forms electrical connection, so that electrical conduction is also formed between the ultrasonic handle and the rotating shaft 2, and the current generated by cutting the magnetic induction line through the coil of the wireless receiving assembly 7 can be transmitted to the vibrator 13, so that high-frequency vibration is generated, and the cutting operation effect of the cutter 9 or the cutter disc is improved.
Compared with the prior art, on the one hand, the non-contact electric conduction formed between the rotating shaft 2 and the cylinder seat 1 can avoid abrasion of a conductive structure, prolong the service life of a main shaft, improve the cutting operation effect of high-frequency vibration, avoid the condition of instantaneous disconnection caused by the deflection of the rotating shaft 2, improve the stability of electric conduction, ensure that the vibrator 13 can stably obtain working current, and greatly improve the rotating speed of the rotating shaft 2 to meet the requirement of high rotating speed.
On the other hand, in the ultrasonic spindle 100 provided by the embodiment of the invention, by arranging the conductive component 8 on the pull rod 3 and concentrating the first conductive body 16 and the second conductive body 17 at the rear end of the pull nail 11, the contact electric connection part of the ultrasonic knife handle and the rotating shaft 2 can be positioned in the ultrasonic knife handle or the rotating shaft 2, but not exposed at the gap between the ultrasonic knife handle and the rotating shaft 2, so that the electric leakage phenomenon can be avoided, and the potential safety hazard is eliminated; meanwhile, as the two conductive pieces are concentrated on the same rod 801, double alignment between the two conductive pieces and the two conductive pieces is converted into single alignment between the rod 801 and the blind rivet 11, so that the alignment difficulty is greatly reduced, and therefore, in the sleeving process of the ultrasonic knife handle and the rotary shaft 2, effective electrical connection can be formed only by butting the rod 801 and the blind rivet 11, between the first conductive piece 802 and the first conductive piece 16 and between the second conductive piece 803 and the second conductive piece 17, and stable electrical conduction can be formed between the ultrasonic knife handle and the rotary shaft 2, so that poor contact can be avoided.
Further, when the handle body 10 is sleeved with the rotary shaft 2, two states exist between the clamping jaw 4 and the blind rivet 11, namely: in the connection state, as shown in fig. 1, the clamping jaw 4 is positioned in the cavity 201, and the claw arm 401 of the clamping jaw 4 is folded and clamps the pull nail 11, so that the cutter handle body 10 cannot be separated from the rotating shaft 2 when rotating; in the disengaged state, the clamping jaw 4 is positioned in the tool retracting cavity 203, and the claw arm 401 of the clamping jaw 4 is opened and disengaged from the blind rivet 11, so that the tool retracting operation is realized.
As shown in fig. 2, in order to improve the stability of the electrical connection between the conductive member and the conductive body, the first conductive body 16 is provided with a first elastic contact, the second conductive body 17 is provided with a second elastic contact, the first conductive member 802 is in contact with the first elastic contact to form an electrical connection, and the second conductive member 803 is in contact with the second elastic contact to form an electrical connection.
As shown in fig. 2, in order to form a good conductive environment, a groove 1103 is provided at the rear end of the blind rivet 11, an insulating ring 18 is provided in the groove 1103, a first conductor 16 and a second conductor 17 are provided in the insulating ring 18, and when the shank body 10 is sleeved with the rotary shaft 2, the front end of the shank 801 is inserted into the ring mouth of the insulating ring 18. Preferably, the rear end of the blind rivet 11 protrudes rearward from the rear end face of the insulating ring 18 to protect the insulating ring 18 from damage by impact. In addition, a first sealing ring 19 is further disposed between the rod 801 and the insulating ring 18, and when the front end of the rod 801 extends into the ring opening of the insulating ring 18, the first sealing ring 19 can clean water or impurities on the rod 801, so as to improve the reliability of electrical connection between the conductor and the conductive member.
Further, as shown in fig. 1 and 3, the pull rod 3 is provided with a first hole 302 therethrough, and the first wire and the second wire pass through the first hole 302. To optimize the arrangement of the first and second wires, a first tunnel 302 extends through both ends of the tie rod 3.
Similarly, as shown in fig. 1 and 4, the blind rivet 11 is provided with a second duct 1102 therethrough, and the second duct 1102 communicates with the recess 1103, and the third and fourth wires pass through the second duct 1102. To optimize the arrangement of the third and fourth wires, a second aperture 1102 extends through both ends of the pull stud 11. In addition, the holder body 10 is further provided with a wire passing hole 1003 communicating the connection groove 1002 with the mounting groove 1001, and the third wire and the fourth wire pass through the wire passing hole 1003.
As shown in fig. 2, in this embodiment, the first conductive member 802 and the second conductive member 803 are conductive round tubes made of metal, the rod body 801 is made of an insulating material, the first conductive member 802 and the second conductive member 803 are embedded in the rod body by injection molding, one end of the first conductive member 802 is exposed at the rear end of the rod body 801 and connected with the first conductive wire, the other end of the first conductive member 802 is exposed at the outer side wall of the rod body 801 for forming an electrical connection after contacting with the first conductive body 16, and similarly, one end of the second conductive member 803 is exposed at the rear end of the rod body 801 and connected with the second conductive wire, and the other end of the second conductive member 803 is exposed at the outer side wall of the rod body 801 for forming an electrical connection after contacting with the second conductive body 17. Based on this, the requirement of alignment between the conductive member and the conductive body is low, and in the process that the rod body 801 stretches into the groove 1103, the first conductive member 802 and the second conductive member 803 are not easy to be worn or bent, so that the service life of the ultrasonic spindle 100 can be effectively prolonged, and the stability of electrical conduction is ensured.
Further, as shown in fig. 2, the conductive component 8 in this embodiment further includes a collar 804, a flange is disposed on an outer side surface of the rod 801 near the rear end thereof, the collar 804 is sleeved outside the rod 801 and presses the flange, a sink 303 is disposed at the front end of the pull rod 3, and the collar 804 is fixed in the sink 303. In order to prevent the first conductive member 802 and the second conductive member 803 from being damaged by impurities such as water and steam, and simultaneously to prevent leakage, a second sealing ring 805 is disposed between the rod body 801 and the collar 804, in this embodiment, two second sealing rings 805 are disposed, and the two second sealing rings 805 are disposed on two sides of the flange respectively.
Illustratively, there are various connection modes between the collar 804 and the pull rod 3, for example, threads are provided on the outer side surface of the collar 804, the collar 804 is fixedly connected with the pull pin 11 through threads, or alternatively, the collar 804 is directly welded with the pull rod 3.
Alternatively, as shown in fig. 1 to 2, the rod body 801 is provided with a through hole 806 penetrating both ends thereof, the through hole 806 being in communication with the first duct 302 of the tension rod 3, and the through hole 806 being also in communication with the second duct 1102 of the blind rivet 11 when the shank body 10 is coupled with the rotary shaft 2. Based on this, the ultrasonic spindle 100 can be provided with a cooling device, and the cooling device can reduce the heat of the vibrator 13 and the cutter 9, improve the working condition thereof, and improve the machining quality by injecting a cooling medium into the first duct 302, the through hole 806, and the second duct 1102 which are communicated with each other during the cutting operation.
Example two
As shown in fig. 5, an embodiment of the present invention provides an ultrasonic machine tool, which mainly includes an ultrasonic power supply 200 and the ultrasonic spindle 100 provided in the first embodiment, wherein the wireless transmitting component 6 of the ultrasonic spindle 100 is electrically connected with the ultrasonic power supply 200, and the ultrasonic power supply 200 may be an external power supply independent of the ultrasonic machine tool or may be integrated on the ultrasonic machine tool.
In summary, compared with the prior art, the ultrasonic spindle 100 has the advantages of long service life, stable electrical conduction, capability of meeting the requirement of high rotating speed, high safety, good processing effect and the like, and the ultrasonic spindle 100 is adopted in the ultrasonic machine tool, so that the ultrasonic machine tool has the advantages of stable electrical conduction, good processing effect and the like.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (17)
1. An ultrasonic spindle, comprising:
The cylinder seat is internally provided with a wireless transmitting assembly;
the rotary shaft penetrates through the cylinder seat and is connected with the cylinder seat through a bearing, a wireless receiving assembly is arranged on the rotary shaft, the wireless receiving assembly and the wireless transmitting assembly are arranged oppositely at intervals, a cavity channel is arranged in the rotary shaft, and a sleeve hole communicated with the cavity channel is formed in the front end of the rotary shaft;
the pull rod is arranged in the cavity and can slide along the cavity, and the front end of the pull rod is provided with a claw seat;
the clamping jaw is connected with the pull rod through the jaw seat and can slide along with the pull rod;
The conductive assembly comprises a rod body, a first conductive piece and a second conductive piece, wherein the first conductive piece and the second conductive piece are arranged on the rod body and are insulated from each other, the rod body is fixed at the front end of the pull rod, the first conductive piece is electrically connected with the coil of the wireless receiving assembly through a wire, and the second conductive piece is electrically connected with the coil of the wireless receiving assembly through a wire;
The ultrasonic knife handle comprises a knife handle body, a blind rivet, an amplitude transformer and a vibrator, wherein the knife handle body can be sleeved with the rotating shaft through the sleeve hole, the rear end of the knife handle body is provided with a mounting groove, the blind rivet is fixedly connected with the knife handle body through the mounting groove, the blind rivet is connected with or disconnected from the clamping jaw, the front end of the knife handle body is provided with a connecting groove, the amplitude transformer is fixedly connected with the knife handle body through the connecting groove, the vibrator is fixed on the amplitude transformer, the rear end of the blind rivet is further provided with a first conductor and a second conductor which are mutually insulated, the first conductor is electrically connected with a first electrode of the vibrator through a wire, and the second conductor is electrically connected with a second electrode of the vibrator through a wire;
The rear end of the blind rivet is provided with a groove, and the first conductor and the second conductor are arranged in the groove;
the front end of the rod body stretches into the groove, the first conductive piece is electrically connected with the first conductive body, and the second conductive piece is electrically connected with the second conductive body;
An insulating ring is arranged in the groove, the first conductor and the second conductor are arranged in the insulating ring, and the front end of the rod body is inserted into the ring opening of the insulating ring;
The first conductive piece and the first conductive body are in contact with the inner side wall of the insulating ring, and the second conductive piece and the second conductive body are also in contact with the inner side wall of the insulating ring.
2. The ultrasonic spindle of claim 1, wherein the rear end of the blind rivet protrudes rearward from the rear end face of the insulating ring.
3. The ultrasonic spindle of claim 1, wherein a seal ring is disposed between the rod body and the insulating ring.
4. The ultrasonic spindle of claim 1, wherein the first electrical conductor is provided with a first spring contact for making an electrical connection upon contact with the first electrical conductor;
the second conductor is provided with a second elastic contact for forming electric connection after being contacted with the second conductor.
5. The ultrasonic spindle of claim 1, wherein the pull rod is provided with a first through hole, and a wire connecting the first conductive member and the coil of the wireless receiving assembly and a wire connecting the second conductive member and the coil of the wireless receiving assembly pass through the first hole.
6. The ultrasonic spindle of claim 5, wherein the first aperture extends through both ends of the pull rod.
7. The ultrasonic spindle of claim 1, wherein the blind rivet is provided with a second through hole through which a wire connecting the first conductor and the first electrode of the vibrator and a wire connecting the second conductor and the second electrode of the vibrator pass.
8. The ultrasonic spindle of claim 7, wherein the second aperture extends through both ends of the blind rivet.
9. The ultrasonic spindle of claim 1, wherein a relief cavity is provided between the channel and the trepanning.
10. The ultrasonic spindle of claim 1, wherein the vibrator is fixed to a rear end of the horn, the handle body is provided with a wire passing hole communicating the connecting groove with the mounting groove, and a wire connecting the first conductor with the first electrode of the vibrator and a wire connecting the second conductor with the second electrode of the vibrator pass through the wire passing hole.
11. The ultrasonic spindle of claim 1, wherein the first conductive member is embedded in the rod body, one end of the first conductive member is exposed out of the rear end of the rod body and is connected with a wire connected with the coil of the wireless receiving assembly, and the other end of the first conductive member is exposed out of the outer side wall of the rod body and is used for forming electrical connection after being contacted with the first conductive member; and/or
The second conductive piece is embedded in the rod body, one end of the second conductive piece is exposed out of the rear end of the rod body and connected with a wire connected with the coil of the wireless receiving assembly, and the other end of the second conductive piece is exposed out of the outer side wall of the rod body and is used for being in electrical connection with the second conductive body after being in contact with the second conductive body.
12. The ultrasonic spindle of claim 1, wherein the first conductive member is a conductive round tube and the second conductive member is a conductive round tube.
13. The ultrasonic spindle of claim 1, wherein the conductive assembly further comprises a collar, a flange is arranged on the outer side surface of the rod body close to the rear end of the rod body, the collar is sleeved outside the rod body and presses the flange, a sink groove is arranged at the front end of the pull rod, and the collar is fixed in the sink groove.
14. The ultrasonic spindle of claim 13, wherein the outer side surface of the collar is provided with threads, and the collar is fixedly connected with the pull rod through the threads; or (b)
The lantern ring is welded with the pull rod.
15. The ultrasonic spindle of claim 13, wherein a seal ring is disposed between the rod body and the collar.
16. The ultrasonic spindle of claim 1, wherein the rod body is provided with through holes penetrating both ends thereof.
17. An ultrasonic machine tool comprising an ultrasonic power source and an ultrasonic spindle according to any one of claims 1 to 16, the ultrasonic power source being electrically connected to a coil of the wireless transmission assembly.
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| CN201910825419.3A CN110394463B (en) | 2019-08-29 | 2019-08-29 | Ultrasonic spindle and ultrasonic machine tool comprising same |
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| CN201910825419.3A CN110394463B (en) | 2019-08-29 | 2019-08-29 | Ultrasonic spindle and ultrasonic machine tool comprising same |
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| CN110394463B true CN110394463B (en) | 2024-05-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112317780B (en) * | 2020-11-09 | 2022-07-08 | 汇专机床有限公司 | Ultrasonic spindle, ultrasonic knife handle and ultrasonic machine tool |
| CN114406300B (en) * | 2022-03-28 | 2022-06-14 | 常州捷乾机电科技有限公司 | Kinetic energy coupling type ultrasonic electric spindle |
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