CN105171131A - Rotary ultrasonic machining device based on non-contact energy transfer - Google Patents
Rotary ultrasonic machining device based on non-contact energy transfer Download PDFInfo
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- CN105171131A CN105171131A CN201510499729.2A CN201510499729A CN105171131A CN 105171131 A CN105171131 A CN 105171131A CN 201510499729 A CN201510499729 A CN 201510499729A CN 105171131 A CN105171131 A CN 105171131A
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Abstract
The invention discloses a rotary ultrasonic machining device based on non-contact energy transfer. The rotary ultrasonic machining device based on non-contact energy transfer comprises a high-speed electric spindle, a primary side assembly fixed to the lower end of the high-speed electric spindle, an ultrasonic knife handle assembly composed of an ultrasonic knife handle and a secondary side assembly arranged on the periphery of the ultrasonic knife handle, and an ultrasonic power supply generator. The ultrasonic knife handle assembly is arranged at the lower end of the high-speed electric spindle, so that the secondary side assembly corresponds to the primary side assembly up and down. The ultrasonic power supply generator is connected with the primary side assembly. According to the rotary ultrasonic machining device based on non-contact energy transfer, the ultrasonic machining technology can be directly combined with existing computer numerical control (CNC) machining centers such as CNC engraving and milling machines, engraving and milling machines, high-gloss CNC machines and drilling and tapping centers, and original spindles do not need to be modified; non-contact energy transfer of ultrasonic waves is achieved through the primary side assembly and the secondary side assembly, and the rotation speed reaches 10,000 turns/min; in addition, the automatic knife switching function can be achieved by using an exiting magazine.
Description
Technical field
The invention belongs to numerical control cutting process equipment, be specifically related to a kind of rotary ultrasonic machining device based on noncontact Energy Transfer.
Background technology
Rotary ultrasonic machining technology is on the basis that tradition rotates processing, and composite ultraphonic vibrates thus realizes removing the processing method of material.It not only remains the characteristic rotating processing, can also utilize the mechanical dither of cutter, increase substantially working (machining) efficiency, reduces the deflection cut, and reduces cutting force, effectively can also improve the suface processing quality of workpiece simultaneously.Therefore rotary ultrasonic machining technology is widely used in the processing of processing the hard brittle materials such as various zirconia ceramics, sapphire, quartz, glass, ferrite.
But existing rotary ultrasonic machining technology is by the CONTACT WITH FRICTION mode transmitting energy of carbon brush with conduction collecting ring, thus there is carbon brush abrasion fast, caloric value is large, cutter rotating speed is not high, cannot realize the problems such as automatic tool changer.
Summary of the invention
The object of this invention is to provide a kind of rotary ultrasonic machining device based on noncontact Energy Transfer that can realize automatic tool changer.
Rotary ultrasonic machining device based on noncontact Energy Transfer provided by the invention, the ultrasonic handle of a knife assembly, the ultrasonic-frequency power supply generator that comprise high-speed electric main shaft, be fixed on the former limit assembly of high-speed electric main shaft lower end, be made up of ultrasonic handle of a knife and the secondary assembly be located at around ultrasonic handle of a knife; The lower end that described ultrasonic handle of a knife assembly is located at described high-speed electric main shaft makes its secondary assembly corresponding up and down with described former limit assembly, and described ultrasonic-frequency power supply generator is connected with described former limit assembly.
Gap between described former limit assembly and secondary assembly is 0.5-2mm.
Described former limit assembly comprises the fixed cover be connected with described high-speed electric main shaft, the transmitting coil being located at holder bottom fixed cover, being located at the former limit magnetic core in holder and being positioned on the magnetic core of former limit, and described ultrasonic-frequency power supply generator is electrically connected with described transmitting coil; Described secondary assembly comprises secondary magnetic core and is located at receiving coil on secondary magnetic core.
Described ultrasonic handle of a knife comprises BT handle of a knife shell, is located at the transducer of BT handle of a knife shell lower end; Described transducer comprises the back shroud, piezoelectric ceramics, positive pole copper sheet, negative pole copper sheet and the ultrasonic transformer that are connected with pre-loading screw successively; Described transducer is fixed on described BT handle of a knife shell by back shroud, and described positive pole copper sheet and negative pole copper sheet are electrically connected with the receiving coil of described secondary assembly; The described upper end of BT handle of a knife shell is fixedly connected with the axle core of high-speed electric main shaft.
The top of described BT handle of a knife shell is BT taper shank, the middle part of BT handle of a knife shell is provided with cannelure for depositing described secondary assembly, have the wire that radial hole and axial hole be electrically connected with the receiving coil of described secondary assembly for described positive pole copper sheet and negative pole copper sheet to pass in described cannelure bottom, the bottom of described BT handle of a knife shell is provided with the annular groove of the manipulator clamping for automatic tool changer.
Beneficial effect of the present invention:
After the present invention starts ultrasonic-frequency power supply generator, it produces the high voltagehigh frequency signal of telecommunication by wire transmission to former limit assembly, former limit assembly by electromagnetic induction principle by electric energy wireless transmission on secondary assembly, secondary assembly is directly connected with the two poles of the earth of transducer, utilize the piezo-electric effect of piezoelectric ceramics in transducer, change through electroacoustic thus drive transducer to produce ultrasonic axial vibration, with after through ultrasonic transformer amplify after be delivered to cutter, make cutter have high frequency axial vibration, electro spindle drives handle of a knife assembly High Rotation Speed simultaneously; Such cutter realizes carrying out rotation and axial vibration two kinds motion simultaneously, and processes workpiece, substantially increases working (machining) efficiency and machined surface quality like this.
The present invention is a kind of based on contactless energy transmission rotary ultrasonic machining device, can directly ultrasonic wave process technology be attached on the numerical control machining centers such as existing carving machine, carving milling machine, high ray machine, Zuan Gong center, do not need to change original main shaft, supersonic non-contact Energy Transfer is realized by former limit assembly and secondary assembly, rotating speed reaches more than 10000 turns, and existing tool magazine can be utilized to realize automatic tool changer function.
Technical scheme of the present invention is further illustrated below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of the assembly conjunction of limit, Central Plains of the present invention and secondary assembly.
Fig. 3 is the left view of Fig. 2.
The structural representation of handle of a knife assembly in Fig. 4 the present invention.
The ultrasound knife handle structure schematic diagram of handle of a knife assembly in Fig. 5 the present invention.
Detailed description of the invention
The preferred embodiments of the present invention as shown in Figure 1, the ultrasonic handle of a knife assembly, the ultrasonic-frequency power supply generator 50 that comprise high-speed electric main shaft 40, be fixed on the former limit assembly 30 of high-speed electric main shaft 40 lower end, be made up of ultrasonic handle of a knife 10 and the secondary assembly 20 be located at around ultrasonic handle of a knife 10; Make its secondary assembly 20 axially corresponding with described former limit assembly 30 after described ultrasonic handle of a knife assembly is mounted to the lower end of described high-speed electric main shaft 40, described ultrasonic-frequency power supply generator 50 is connected with described former limit assembly 30.
Described high-speed electric main shaft 40, the speed of mainshaft is 10000-40000r/min, dynamic balancing G0.4; Described ultrasonic-frequency power supply generator out-put supply frequency at about 20KHZ, power at 200-1000W, power continuously adjustabe; When after replacing handle of a knife or cutter, the cutter cantilevered length filled can be inconsistent, the frequency of whole handle of a knife is caused to have small variations, ultrasonic-frequency power supply generator 50 has to be searched frequently and automatic frequency tracking function, automatically can adjust export signal frequency thus be in resonant condition with the intrinsic frequency of handle of a knife according to feedback.
Described former limit assembly 30 and secondary assembly 20 as shown in Figure 2 and Figure 3, described former limit assembly 30 comprise be connected with described high-speed electric main shaft fixed cover 31, be located at the holder 32 bottom fixed cover 31, the tubulose be located in holder former limit magnetic core 34 and be positioned at the ring-type transmitting coil 33 of former limit magnetic core 34 upper groove; Described holder 32 screw 36 is fixed on fixed cover 31, and holder 32 is provided with wire guide 35, and the electric wire 501 of described ultrasonic-frequency power supply generator is connected with the transmitting coil 33 of former limit assembly 30 through wire guide 35; Fixed cover 31 matches with high-speed electric main shaft shell, fixed cover 31 cylindrical there is a breach 37, and establish two lock screws 39 and a top to loosen the screw a little 38, loosen the screw a little and 38 facilitate fixed cover 31 to be arranged on main shaft and the distance of adjustment and secondary assembly 20 in top, fixing after lock screw 39 facilitates the good distance of fixed cover 31 install and adjust; Described secondary assembly 20 comprises secondary magnetic core 22, the receiving coil 21 be located in secondary magnetic core 22 upper groove.The gap of described former limit assembly 30 and secondary assembly 20 remains between 0.5-2mm, and preferred gap is 0.8mm.This kind of mode is installed and is regulated simply, can not produce any impact to main shaft.Holder 32 is fixedly connected with fixed cover 31 lower end by screw 36.
Transmitting coil 33 material of the assembly of former limit described in the present embodiment 30 is copper enamel-covered wire, wire diameter is 0.5-0.9mm, the number of turn is 30-80 circle, first transmitting coil 33 is placed in the cannelure of former limit magnetic core 34, then transmitting coil 33 and former limit magnetic core 34 1 is reinstated epoxy pouring sealant and be encased in the cannelure of holder 32.The effect of described former limit magnetic core 34 improves energy conversion efficiency, and its material is the manganese-zinc ferrite of ferrite, preferred DMR40.The cannelure that described receiving coil 21 is placed in secondary magnetic core 22 forms secondary assembly 20, both again overall package in the cannelure 121 of ultrasonic handle of a knife 10, form ultrasonic handle of a knife assembly.Receiving coil 21 material of described secondary assembly 20 is copper enamel-covered wire, and wire diameter is 0.5-0.9mm, and the number of turn is 30-80 circle, identical with the number of turn with the wire diameter of transmitting coil.The effect of described secondary magnetic core 22 improves energy conversion efficiency, and its material is the manganese-zinc ferrite of ferrite, preferred DMR40.
Described ultrasonic handle of a knife 10 as shown in Figure 4, comprise blind rivet 11, BT handle of a knife shell 12, wire 13, seal plug 14, transducer 15, screw 16, ER collet chuck 17, ER nut 18, cutter 19, wherein transducer 15 comprises back shroud 151, pretension bolt 152, piezoelectric ceramics 153, positive pole copper sheet 154, negative pole copper sheet 155, ultrasonic transformer 156; The upper end of BT handle of a knife shell 12 is fixedly connected with by blind rivet 11 with the axle core of high-speed electric main shaft 40, the back shroud 151 of described transducer 15, piezoelectric ceramics 153, positive pole copper sheet 154, negative pole copper sheet 155 and ultrasonic transformer 156, be connected with described pre-loading screw 152 successively, and ensure that benchmark is coaxial; The upper part of transducer 15 is positioned at the inside of described BT handle of a knife shell 12 lower end, its positive pole copper sheet 154 is connected with wire 13 with the receiving coil 21 of negative pole copper sheet 155 with described secondary assembly 20, and be connected with described BT handle of a knife housing 12 by ultrasonic transformer 156, matching with the screw hole 125 bottom BT handle of a knife housing 12 with screw 16 is fastened on ultrasonic transformer 156 on BT handle of a knife housing 12.Described cutter 19 is plated diamond grinding wheel, is connected with ER nut 18 by ER collet chuck 17 with ultrasonic transformer 156 end thread of transducer.
See Fig. 5, the top of the handle of a knife of BT described in the present embodiment shell 12 is BT taper shank 127, the middle part of BT handle of a knife shell 12 is provided with cannelure 121 for depositing described secondary assembly 20, radial hole 123 and axial hole 122 is had in cannelure 121 bottom, its effect is connected on the copper-base of transducer through the radial hole 123 on both sides and axial hole 122 by the wire 13 of described receiving coil 21, thus make the Electrode connection of receiving coil 21 and described transducer.Outside radial hole 123, have seal plug 14 to block up note and do not allow wire exposed outside handle of a knife assembly, the bottom of BT handle of a knife shell 12 is provided with the annular groove 124 for the manipulator clamping of automatic tool changer.
Ultrasonic handle of a knife 10 described in the present embodiment and secondary assembly 20 form ultrasonic handle of a knife assembly with casting glue is fixing, under the drive under high-speed electric main shaft, ultrasonic handle of a knife component operation rotating speed is 10000-40000r/min, therefore need to do dynamic balancing to whole ultrasonic handle of a knife assembly, requirement for dynamic balance G0.4, dynamic balancing boring duplicate removal position 126 is located at the surface on ultrasonic handle of a knife 10 between BT taper shank 127 and cannelure 121.Described ultrasonic handle of a knife assembly is when tool changing, and manipulator is clamped on the groove 124 of ultrasonic handle of a knife 10, can realize automatic tool changer.
The course of work of the present invention: start ultrasonic-frequency power supply generator 50, it produces the high voltagehigh frequency signal of telecommunication by wire transmission on the transmitting coil 33 of former limit assembly 30, transmitting coil 33 is wirelessly transmitted on the receiving coil 21 of secondary assembly 20 by electromagnetic induction principle, receiving coil 21 directly and copper electrode (the positive pole copper sheet 154 of transducer 15, negative pole copper sheet 155) be connected, by the piezo-electric effect of piezoelectric ceramics after such transducer energising, change through electroacoustic thus produce ultrasonic vibration, be delivered on plated diamond grinding wheel 18 with after vibration through the amplification of ultrasonic transformer 156, meanwhile, high-speed electric main shaft 40 drives ultrasonic handle of a knife assembly High Rotation Speed, such cutter 19 can realize carrying out rotation and axial vibration two kinds motion simultaneously, and carries out grinding to workpiece, substantially increases working (machining) efficiency and machined surface quality.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. based on a rotary ultrasonic machining device for noncontact Energy Transfer, the ultrasonic handle of a knife assembly, the ultrasonic-frequency power supply generator that it is characterized in that comprising high-speed electric main shaft, be fixed on the former limit assembly of high-speed electric main shaft lower end, be made up of ultrasonic handle of a knife and the secondary assembly be located at around ultrasonic handle of a knife; The lower end that described ultrasonic handle of a knife assembly is located at described high-speed electric main shaft makes its secondary assembly corresponding up and down with described former limit assembly, and described ultrasonic-frequency power supply generator is connected with described former limit assembly.
2. the rotary ultrasonic machining device based on noncontact Energy Transfer according to claim 1, is characterized in that the gap between described former limit assembly and secondary assembly is 0.5-2mm.
3. the rotary ultrasonic machining device based on noncontact Energy Transfer according to claim 2, it is characterized in that described former limit assembly comprises the fixed cover be connected with described high-speed electric main shaft, the transmitting coil being located at holder bottom fixed cover, being located at the former limit magnetic core in holder and being positioned on the magnetic core of former limit, described ultrasonic-frequency power supply generator is electrically connected with described transmitting coil; Described secondary assembly comprises secondary magnetic core and is located at receiving coil on secondary magnetic core.
4. the rotary ultrasonic machining device based on noncontact Energy Transfer according to claim 3, is characterized in that described ultrasonic handle of a knife comprises BT handle of a knife shell, is located at the transducer of BT handle of a knife shell lower end; Described transducer comprises the back shroud, piezoelectric ceramics, positive pole copper sheet, negative pole copper sheet and the ultrasonic transformer that are connected with pre-loading screw successively; Described transducer is fixed on described BT handle of a knife shell by back shroud, and described positive pole copper sheet and negative pole copper sheet are electrically connected with the receiving coil of described secondary assembly; The described upper end of BT handle of a knife shell is fixedly connected with the axle core of high-speed electric main shaft.
5. the rotary ultrasonic machining device based on noncontact Energy Transfer according to claim 4, the top that it is characterized in that described BT handle of a knife shell is BT taper shank, the middle part of BT handle of a knife shell is provided with cannelure for depositing described secondary assembly, have the wire that radial hole and axial hole be electrically connected with the receiving coil of described secondary assembly for described positive pole copper sheet and negative pole copper sheet to pass in described cannelure bottom, the bottom of described BT handle of a knife shell is provided with the annular groove of the manipulator clamping for automatic tool changer.
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| CN201510499729.2A CN105171131A (en) | 2015-08-15 | 2015-08-15 | Rotary ultrasonic machining device based on non-contact energy transfer |
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| CN201510499729.2A CN105171131A (en) | 2015-08-15 | 2015-08-15 | Rotary ultrasonic machining device based on non-contact energy transfer |
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