CN102069249B - Taper angle push and deflection mechanism for electrosparking micro reversed taper hole - Google Patents
Taper angle push and deflection mechanism for electrosparking micro reversed taper hole Download PDFInfo
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- CN102069249B CN102069249B CN201010598360A CN201010598360A CN102069249B CN 102069249 B CN102069249 B CN 102069249B CN 201010598360 A CN201010598360 A CN 201010598360A CN 201010598360 A CN201010598360 A CN 201010598360A CN 102069249 B CN102069249 B CN 102069249B
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Abstract
The invention provides a taper angle push and deflection mechanism for electrosparking a micro reversed taper hole, and belongs to the technical field of micro special type processing. The mechanism is used for electrosparking the micro reversed taper hole on an oil nozzle in the standard of European level IV (national level 4) or above; based on the motion principle of the reverse taper conical surface of a micro electrode wire, the micro reverse taper hole processing can be realized. By the method of fitting an inner conical surface of a deflection shaft sleeve and a convex spherical surface, the peak of the micro taper angle is accurately positioned according to the spherical centre; by arranging an eccentric distance of the upper end of the deflection shaft sleeve, the micro angle is adjusted precisely; by the similar planetary motion of two bearings, the aim of realizing the non-rotating motion of the deflection shaft sleeve by power transmission when the taper angle is deflected is achieved; and a positioning pin precisely positions a rotary module so that the rotation centre of the rotary module is overlapped with the vertical axis of the spherical centre of the convex spherical surface. When the micro reverse taper hole is processed, the electrode wire moves along a set conical surface under the driving of the deflection shaft sleeve and a guide ceramic tube in addition to axial servo feeding so as to process the reverse taper hole with the set taper angle on a workpiece.
Description
Technical field
The invention belongs to fine special processing technology field, particularly a kind of cone angle that is used for the superfine back taper hole spark machined pushes away swinging mechanism, the mainly atomizer processing of IV (state 4) more than the standard towards Europe.
Background technology
High-performance directions such as Diesel engine forward high speed, high injection pressure, low emission develop, and the advanced manufacturing technology of Diesel engine critical component receives much concern.Injector nozzle matching parts is the critical component that influences engine performance, life-span and reliability.For the discharge coefficient that effectively improves the fine spray orifice course of injection of atomizer and and atomizing effect; The fine spray orifice of diesel injector not only requires the aperture less than 0.2mm; And require the aperture to diminish gradually along injection direction to form " the back taper hole " of 1～2 ° of cone angle, to reach the above discharge standard of Europe IV (state 4).
Traditional mechanical drilling can't have been satisfied the fine spray orifice process requirements of high standard.The fine spray orifice of spark machined has no mechanical operating force, injection diameter is little, precision is higher, the balancing gate pit does not have burr, can be placed on and advantage such as process after the heat treatment.Yet,, process promptly that inlet diameter is big, the export processing diameter is little because the sideflash of processing bits and hole wall in the spark machined makes the spray orifice that processes generally present " positive taper " aperture shape.
At present, for realizing " back taper " fine spray orifice processing, being employed in the integrated mechanism module that makes edm in wire electrode " back taper " space on the main tapping, is solution preferably.Research has in this regard obtained some achievements in research both at home and abroad, but mainly adopts the mode of wire electrode or the necessary rotation of its fairlead
[1～2]Practice shows; When the spinning of micro-electrode silk or fairlead realizes back taper hole edm; Because micro-electrode silk rigidity is low and the spinning precision is restive; Cause superfine back taper hole processing dimension and cone angle error bigger, and be difficult to realize the lasting servo feed electrode compensation of wire electrode in the rotation.
The patent of invention that propose early stage
[3]Discover: regulate " back taper " cone angle through pad and be difficult to operation, accurately regulating continuously of cone angle can't be realized along with the variation of spacer thickness has uncertainty in the cone angle summit.And; If guarantee not time rotational of wire electrode servo feed; Has sliding friction between rotating shaft, left cushion block, right cushion block and the wire electrode; When length of fit length be frictional contact surface when big, act on the destructive consequence that the frictional force on the wire electrode can cause wire electrode " to twist into two parts ", make it be difficult to commercial Application.
[1]Schubert.J?Hoppe.V，Schramm.G，Pluta.J，Herold.S，Grota.B.Device?for?erodingconical?borings.Europe?patent?application?NO.1584397-A2?January?2005
[2]Stephan?Aurich，Carsten?Brandt，Wilhelm?Frank，Rudiger?Garn，Jens?Hornig.Electrode?guide?for?spark?erosion?machines?and?a?method?for?the?spark?erosion?ofwork?pieces.US?patent?application?NO.2004/0056004?A1?Mar.2004
[3] Li Yong, Liu Wei, Xu Minggang, Lv Shanjin, Jia Weipu. superfine back taper hole spark-erosion machining electrode movement guide mechanism. application number: 200810112281.4, publication number: CN 101318244A., open day on December 10th, 2008
Summary of the invention
For realizing the atomizer superfine back taper spray orifice processing of the above discharge standard of Europe IV (state 4); Solve adjustable continuously, the no rotation wire electrode of back taper angle high-resolution and bore plane rocking, the pinpoint guardian technique problem in small cone angle summit simultaneously at servo feed, the present invention provides that the wire electrode cone angle pushes away swinging mechanism in a kind of superfine back taper hole spark machined.
The technical scheme that the present invention adopts is:
1,,, realizes the processing of back taper hole electric spark through the spark discharge between wire electrode and the atomizer workpiece based on wire electrode back taper taper seat motion principle.
2, the protruding sphere match mode through deflection axle sleeve internal conical surface and spherical locating piece; The fixedly centre of sphere with spherical locating piece is accurately located small cone angle summit; The work surface position that guarantees cone angle summit, back taper hole and atomizer workpiece is accurately controlled, reaches the consistent and controlled purpose of back taper hole inlet size.
Associated components is formed and connected matching relationship: trip bolt is affixed with spherical locating piece and fixed support; Conical surface holddown spring compresses deflection axle sleeve and spherical locating piece; Guarantee the protruding sphere match of deflection axle sleeve internal conical surface and spherical locating piece; The allotment of guiding ceramics pole and deflection axle sleeve makes the wire electrode axis through the spherical locating piece centre of sphere, and affixed with will lead ceramics pole and deflection axle sleeve of glue, designs the spherical locating piece centre of sphere and is positioned at the 0.5～2mm place, ceramics pole lower end of leading; Push away swinging mechanism module Z-direction and atomizer to be processed surface relative position through the cone angle of controlling said invention, can guarantee that the back taper hole inlet size of processing is consistent and controlled.
3, adopt error to dwindle principle, utilize the cone angle adjustment screw to regulate the eccentric distance of the cone angle Deflector block of yawing axis set upper side, realize the accurately adjustable continuously of small cone angle size.
Associated components is formed and connected matching relationship: the thrust drive block is fixed in the outer ring of biserial spring bearing; Cone angle Deflector block interference fit is fixed in the outer ring of deflection bearing; Spring cone of support angular deflection piece; Cone angle adjustment screw and thrust drive block adopt the fine thread coupling; The inner ring of deflection bearing and deflection axle sleeve interference fit are connected, and utilize the swing circlip to prevent that deflection bearing from endwisely slipping, and realize eccentric distance through the relative position of cone angle adjustment screw cone governor angular deflection piece and thrust drive block.
4,, reach and transmit the purpose of not having spinning motion when deflection power makes yawing axis be enclosed within the cone angle beat through the class planetary motion of deflection bearing with respect to the biserial spring bearing.
Associated components is formed and connected matching relationship: biserial spring bearing inner ring and fixed hub interference fit are connected; Fixedly circlip prevents that the biserial spring bearing from endwisely slipping; Biserial spring bearing outer ring and thrust drive block interference fit are connected, and the thrust drive block is connected with big synchronous pulley interference fit; The inner ring of deflection bearing and deflection axle sleeve interference fit are connected, and utilize the swing circlip to prevent that deflection bearing from endwisely slipping, the relative motion of conical surface holddown spring restriction deflection axle sleeve and fixed hub; Synchronously band transmits rotation and drives Datong District's step belt wheel and thrust drive block rotatablely move around fixing axle center (sun gear); Drive the cone angle Deflector block through the cone angle adjustment screw and rotatablely move (sun gear) around fixing axle center, the deflection axle sleeve receives the constraint of conical surface holddown spring and the cone angle that do not have a rotation is swung.
5, adopt alignment pin, accurately positioning and fixing axle sleeve axis overlaps with spherical locating piece centre of sphere place vertical axis, passes the centre of sphere of spherical locating piece to guarantee rotary module (sun gear) the rotation axis on the biserial spring bearing outer ring.
Matching relationship is formed and connected to associated components: two alignment pins are with fixed hub, spherical locating piece, fixed support three location, and trip bolt is connected fixed hub, spherical locating piece, fixed support three.
6, cooperate installation guiding ceramics pole in the deflection axle sleeve, be used to retrain the axial feed and the cone angle swing of wire electrode.
Matching relationship is formed and connected to associated components: cooperates gluing installing and fixing in guiding ceramics pole and the deflection axle sleeve, and guiding ceramics pole processing endoporus and wire electrode precision matched in clearance, assurance pushed away oscillatory forces transmission and guide effect when wire electrode was freely advanced and retreat.
The invention has the beneficial effects as follows:
1, the present invention pushes away the swinging mechanism module for the superfine back taper hole spark machined provides cone angle, and this is that the processing of the above high-quality atomizer of Europe IV (state 4) standard superfine back taper spray orifice provides approach.
2, utilize cone angle summit, back taper hole, fixed convex sphere centre of sphere location, the random error influence of having avoided the motion of wire electrode conical pendulm to introduce can guarantee that the position stability on cone angle summit is constant, and this has improved the controllable precision and the uniformity precision of back taper hole inlet size.
3, the screw thread that dwindles principle based on error is regulated the cone angle method continuously; Can realize that the high-resolution of small reversed cone angle regulates continuously; Improved operation convenience, be easy to straight hole processing and back taper hole function of processing and switch, this makes mechanism module of the present invention have the wider scope of application.
4, wire electrode and guiding ceramics pole all do not have the back taper hole process of rotation, have overcome wire electrode or its guider rotation eccentric error, help improving the superfine back taper hole machining accuracy; Wire electrode and its guider do not have relative motion, and fricton-tight so between the two frictional resistance avoids wire electrode " to twist into two parts " destructive failure, help improving wire electrode advance and retreat response speed, and this will improve the working (machining) efficiency in back taper hole.
Description of drawings
Fig. 1 pushes away swinging mechanism module scheme of installation on fine electric spark processing unit (plant) main shaft for said cone angle;
Fig. 2 pushes away the swinging mechanism module diagram when being set at 2 ° for the back taper drift angle;
Fig. 3 adds the man-hour wire electrode along inverted cone surface oscillating motion schematic diagram for the back taper hole;
Fig. 4 is the A-A face cutaway view of Fig. 2;
Fig. 5 is the B-B face cutaway view of Fig. 2.
Label among the figure:
1-spring force adjustment screw; The 2-upper end cover; 3-cone angle support spring; 4-cone angle Deflector block; The 5-deflection bearing; The 6-wire electrode; 7-swings circlip; 8-Deflector block support spring; 9-thrust drive block; 10-cone angle adjustment screw; 11-is circlip fixedly; 12-biserial spring bearing; The big synchronous pulley of 13-; The 14-bottom end cover; The 15-fixed hub; The spherical locating piece of 16-; The 17-trip bolt; 18-embeded guidewire cover; The 19-ceramics pole that leads; 20-atomizer workpiece; 21-deflection axle sleeve; 22-conical surface holddown spring; The 23-fixed support; 24-is with synchronously; The 25-small synchronous pulley; The 26-buncher; The normally closed clip of 27-; 28-often drives clip; 29-axis feeding contiguous block; The 30-alignment pin.
The specific embodiment
The invention provides a kind of cone angle that is used for the superfine back taper hole spark machined and push away swinging mechanism, describe mechanical formation of the present invention, connection and matching relationship, course of action and operating procedure in detail below in conjunction with accompanying drawing.At first specify machinery formation and assembling annexation; The concrete operations step and the course of action of processing atomizer superfine back taper hole are described then.
1, explanation machinery of the present invention constitutes and the assembling annexation
As shown in Figure 1, for pushing away the swinging mechanism module, cone angle of the present invention on fine electric spark processing unit (plant) main shaft, embodiment is installed.
2, the concrete operations step and the course of action of the processing of explanation atomizer superfine back taper hole
As shown in Figure 2, be that 2 ° superfine back taper hole is processed as example with the back taper drift angle, concrete operations step and course of action are described.
(1) sets the back taper angle
Cone angle pushes away before the swinging mechanism module application, demarcates the dead-center position of the adjustment screw 10 of 0 ° of reversed cone angle, with the reference point of confirming that cone angle is regulated and set.According to 2 ° of the preprocessing superfine back taper drift angle number of degrees, the regulated quantity of calculating adjustment screw 10 is 0.5mm, and employing pitch is 0.2 fine thread, adjustment screw 10 precessions 2.5 circles.Can know: as regulating resolution ratio, then back taper angular adjustment resolution ratio can reach 0.1 °, can satisfy the requirement of reversed cone angle degree of regulation as if 1/8 circle that is easy to realize with adjustment screw 10.
(2) back taper hole machining control course of action
According to superfine back taper hole to be processed entrance hole diameter, location atomizer workpiece 20 and guiding ceramics pole 19 lower end relative positions.As shown in Figure 3, in this example reversed cone angle summit O is positioned atomizer workpiece 20 upper surfaces, to obtain minimum processing entrance hole diameter, i.e. the atomizer workpiece 20 upper surfaces to be processed 1mm place, ceramics pole 19 lower end that is positioned to lead.
Utilize normally closed clip 27 to unclamp and clamp and coordinate to switch,, make wire electrode 6 reach atomizer workpiece 20 upper surfaces to be processed through axis feeding contiguous block 29 creeping motion type feeder electrode silks 6 with Chang Kai clip 28.
Claims (4)
1. the cone angle that is used for the superfine back taper hole spark machined pushes away swinging mechanism, it is characterized in that,
Spherical locating piece (16) and fixed support (23) are affixed, and conical surface holddown spring (22) compresses the land portions of deflection axle sleeve (21) with spherical locating piece (16), guarantees the protruding sphere match of deflection axle sleeve (21) internal conical surface and spherical locating piece (16); Guiding ceramics pole (19) is installed in deflection axle sleeve (21); Guiding ceramics pole (19) makes wire electrode (6) axis through spherical locating piece (16) centre of sphere with deflection axle sleeve (21) allotment; Push away swinging mechanism module Z-direction and atomizer to be processed surface relative position through controlling said cone angle, guarantee that the back taper hole inlet size of processing is consistent and controlled;
Biserial spring bearing (12) inner ring and fixed hub (15) interference fit are connected; Thrust drive block (9) is fixed in the outer ring of biserial spring bearing (12), and the two interference fit is connected, and the outer wall of thrust drive block (9) is connected with big synchronous pulley (13) interference fit; Deflection bearing (5) is positioned at the top of biserial spring bearing (12), and the upper end interference fit of its inner ring and deflection axle sleeve (21) is connected; Conical surface holddown spring (22) is set on the deflection axle sleeve (21), and its end face contacts with fixed hub (15) with deflection axle sleeve (21) respectively, with the relative motion of restriction conical surface holddown spring (22) with fixed hub (15);
Cone angle Deflector block (4) interference fit is fixed in the outer ring of deflection bearing (5), and spring (8) places on the thrust drive block (9), cone of support angular deflection piece (4); Cone angle adjustment screw (10) adopts the fine thread coupling with thrust drive block (9), realizes eccentric distance through cone angle adjustment screw (10) the cone governor angular deflection piece (4) and the relative position of thrust drive block (9);
With two alignment pins fixed hub (15), spherical locating piece (16), fixed support (23) three are located; Guaranteeing that the rotary module rotation axis on biserial spring bearing (12) outer ring passes the centre of sphere of spherical locating piece (16), and fixed hub (15), spherical locating piece (16), fixed support (23) three are connected with trip bolt;
Synchronously band (24) transmits rotation and drives Datong District's step belt wheel (13) and thrust drive block (9) and rotatablely move around fixing axle center; Drive cone angle Deflector block (4) through cone angle adjustment screw (10) and rotatablely move around fixing axle center, deflection axle sleeve (21) receives conical surface holddown spring (22) constraint and the cone angle of doing no rotation is swung.
2. the cone angle that is used for the superfine back taper hole spark machined according to claim 1 pushes away swinging mechanism, it is characterized in that, the centre of sphere of said spherical locating piece (16) is positioned at guiding 0.5～2mm place, ceramics pole (19) lower end.
3. the cone angle that is used for the superfine back taper hole spark machined according to claim 1 pushes away swinging mechanism; It is characterized in that; Adopt gluing mode to fix between said guiding ceramics pole (19) and the deflection axle sleeve (21); And in gluing fixation procedure, regulate radially relative position of guiding ceramics pole (19) and deflection axle sleeve (21), make wire electrode (6) axis pass the centre of sphere of spherical locating piece (16).
4. the cone angle that is used for the superfine back taper hole spark machined according to claim 1 pushes away swinging mechanism; It is characterized in that; The endoporus of said guiding ceramics pole (19) and wire electrode (6) 2～4 μ m matched in clearance make wire electrode (6) guarantee to push away oscillatory forces transmission and guide effect when freely advancing and retreat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010598360A CN102069249B (en) | 2010-12-10 | 2010-12-10 | Taper angle push and deflection mechanism for electrosparking micro reversed taper hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010598360A CN102069249B (en) | 2010-12-10 | 2010-12-10 | Taper angle push and deflection mechanism for electrosparking micro reversed taper hole |
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| Publication Number | Publication Date |
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| CN102069249A CN102069249A (en) | 2011-05-25 |
| CN102069249B true CN102069249B (en) | 2012-09-05 |
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| CN201010598360A Expired - Fee Related CN102069249B (en) | 2010-12-10 | 2010-12-10 | Taper angle push and deflection mechanism for electrosparking micro reversed taper hole |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294525B (en) * | 2011-08-22 | 2013-04-10 | 无锡微研有限公司 | Taper angle rolling pendulum mechanism for electrosparking fine reversed cone hole |
| CN103286400B (en) * | 2013-07-02 | 2015-04-01 | 中国工程物理研究院激光聚变研究中心 | Large depth-diameter ratio double taper hole wire cut electrical discharge machining method of conductive materials |
| CN103752961B (en) * | 2013-12-11 | 2016-06-22 | 山东鲁南机床有限公司 | A kind of high-accuracy rotary EDM spray orifice back taper mechanism |
| CN103769705B (en) * | 2014-01-17 | 2016-06-15 | 清华大学 | A kind of Multifunctional main axis mechanism for dark aperture spark machined |
| CN104014891A (en) * | 2014-06-18 | 2014-09-03 | 哈尔滨工业大学 | Taper adjusting double-guidance device for fine electric spark micropore machining |
| CN104625257B (en) * | 2015-02-09 | 2017-01-11 | 苏州电加工机床研究所有限公司 | Adjustable tiny inverted taper hole electric spark machining device |
| CN111014860A (en) * | 2019-12-26 | 2020-04-17 | 国营第六一六厂 | Needle valve body high-flow-rate fine inverted cone hole wire type electric discharge machining method |
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| JP2008238372A (en) * | 2007-03-28 | 2008-10-09 | Honda Motor Co Ltd | Electric discharge machining method of slot |
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2010
- 2010-12-10 CN CN201010598360A patent/CN102069249B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1489502A (en) * | 2001-01-25 | 2004-04-14 | 西门子公司 | Electrode guide for spark-erosion machines and method for spark-erosion of workpieces |
| EP1535686A2 (en) * | 2003-11-29 | 2005-06-01 | Robert Bosch Gmbh | Method and apparatus for electro-erosion machining conical holes. |
| US20080203069A1 (en) * | 2007-02-28 | 2008-08-28 | Chen-Chun Kao | EDM process for manufacturing reverse tapered holes |
| JP2008238372A (en) * | 2007-03-28 | 2008-10-09 | Honda Motor Co Ltd | Electric discharge machining method of slot |
| CN101318244A (en) * | 2008-05-22 | 2008-12-10 | 清华大学 | Superfine back taper hole spark-erosion machining electrode movement guide mechanism |
Non-Patent Citations (1)
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| 马洪驹 等.微细倒锥孔电火花加工机构设计及其实验研究.《电加工与模具》.2010,(第5期), * |
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