CN104759719A - Line discharge grinding processing technology of micro groove in tiny arc-shaped sheet and guide sheet - Google Patents

Abstract

The invention discloses a line discharge grinding processing technology of a micro groove in a tiny arc-shaped sheet and a guide sheet. The processing technology comprises the steps that S1, a datum plane is set; S2, the top end of the tiny arc-shaped sheet is made to correspond to the datum plane, and the circle center O of the arc face on the tiny arc-shaped sheet is determined; S3, a line electrode is provided, and the axis of the line electrode is horizontally flush with the top end point of the tiny arc-shaped sheet; S4, the tiny arc-shaped sheet is made to rotate with the circle center O as a rotating center, and the line electrode is made to be fed along the axis so that the micro groove is processed in the top end of the tiny arc-shaped sheet; S5, the fed line electrode is processed to meet the requirement for the depth of the micro groove. According to the line discharge grinding processing technology of the micro groove in the tiny arc-shaped sheet, the line discharge grinding processing process is carried out on the tiny arc-shaped sheet, the requirement for processing the micro groove in the tiny arc-shaped sheet can be met, the processing precision of the micro groove is improved, the processed micro groove can be matched with the line electrode well, and the technology is suitable for line electrode wiring.

Description

Nick line of rabbet joint electric discharge grinding technique and prerotation vane on small circular arc thin slice

Technical field

The present invention relates to micro-NTM technical field, especially relate to nick line of rabbet joint electric discharge grinding technique and prerotation vane on a kind of small circular arc thin slice.

Background technology

Adopt circular arc top end mask to have the discharging grinding and paring of line electrode technique of the small circular arc thin slice of micro groove, carry out line electric discharge Grinding Process, the processing of the small spherical crown surface of indent on conductive material can be realized.The machining accuracy of the micro groove on small circular arc thin slice itself, directly affects the machining accuracy of the small spherical crown surface of indent.Therefore, in order to ensure the machining accuracy of the small spherical crown surface of indent, not only require that the micro groove of the top end face of small circular arc thin slice has higher circular trace precision, what also will be applicable to line electrode is easy to wire and coupling requirement.The method such as existing machining, sinking EDM, Wire EDM, Laser Processing, can be implemented in plane and processes accurate micro groove, but cannot meet the process technology requirement of small circular arc sheet top end face micro groove.

Summary of the invention

The present invention is intended at least to solve one of technical problem existed in prior art.For this reason, the present invention proposes nick line of rabbet joint electric discharge grinding technique on a kind of small circular arc thin slice, and described processing technology can reach the process technology requirement of small circular arc sheet top end face micro groove.

The invention allows for a kind of prerotation vane, the micro groove on described prerotation vane is made up of above-mentioned processing technology.

Nick line of rabbet joint electric discharge grinding technique on small circular arc thin slice according to a first aspect of the invention, to be processed of wherein said small circular arc sheet top end face is arc surface, it is characterized in that, comprises the following steps: S1, arrange datum plane; S2, the top of described small circular arc thin slice is corresponded to described datum plane, and determine the center of circle O of arc surface on described small circular arc thin slice; S3, provide line electrode, make the axis of described line electrode concordant with the described top end points level of described small circular arc thin slice; S4, make described small circular arc thin slice with described center of circle O for pivot rotates, and make described line electrode along its axis feeding to process micro groove on the described top of described small circular arc thin slice; Described in S5, processing feeding, line electrode is to reach the depth requirements of described micro groove.

According to nick line of rabbet joint electric discharge grinding technique on the small circular arc thin slice of the first aspect of invention, the process technology requirement of small circular arc sheet top end face micro groove can be reached, improve the machining accuracy of the micro groove of the top end face of small circular arc thin slice, the micro groove processed is mated well, with the wire of applicable line electrode with line electrode.

According to some embodiments of the present invention, described step S2 comprises following concrete steps: S21, the default O1 that slightly centers on described small circular arc thin slice, for pivot, described small circular arc thin slice is rotated to multiple different station with the described O1 that slightly centers, the deviation between the center of circle O calculating arc surface on described slightly center O1 and described small circular arc thin slice; S22, described pivot is moved to the O place, the center of circle of arc surface on described small circular arc thin slice.

Further, described step S21 also comprises: S211, with the described O1 that slightly centers for after described small circular arc thin slice rotates to multiple different station by pivot, be recorded in the vertical line distance, delta Ln between the top end points of small circular arc thin slice described in different station place and described datum plane; S212, by the deviation between the center of circle O that calculates arc surface on described slightly center O1 and described small circular arc thin slice.

Again further, in described step S212, on described slightly center O1 and described small circular arc thin slice arc surface center of circle O between deviation value (x, y) by following formulae discovery:

$\mathrm{\θ}={\tan }^{-1}\frac{\cos \frac{\mathrm{\α}}{2}-\frac{\mathrm{\Δ}{L}_2\sin \mathrm{\α}}{(\mathrm{\Δ}{L}_1+\mathrm{\Δ}{L}_2)\sin \frac{\mathrm{\α}}{2}}}{\sin \frac{\mathrm{\α}}{2}}---\left(1\right)$

$\left\{\begin{array}{c}x=\frac{\mathrm{\Δ}{L}_2}{\sin (\mathrm{\θ}+\mathrm{\α})-\sin \mathrm{\θ}}\·\cos \mathrm{\θ}\\ y=\frac{\mathrm{\Δ}{L}_2}{\sin (\mathrm{\θ}+\mathrm{\α})-\sin \mathrm{\θ}}\·\sin \mathrm{\θ}\end{array}\right.---\left(2\right)$

Wherein, using the described vertical line slightly centered between O1 and described datum plane as during with reference to line, α is the angle that the central axis of described small circular arc thin slice is clockwise about described reference line and be rotated counterclockwise; Δ L1 is the vertical line distance that the central axis of described small circular arc thin slice turns clockwise between the top end points of described small circular arc thin slice after angle [alpha] and described datum plane about described reference line; Δ L2 is that the central axis of described small circular arc thin slice is about the vertical line distance between the top end points of small circular arc thin slice described after described reference line rotated counterclockwise by angle α and described datum plane; R is the radius of arc surface on described small circular arc thin slice; θ is calculated value.

In further embodiment more of the present invention, the vertical line distance, delta Ln between the top end points of described small circular arc thin slice and described datum plane is measured by electrical contact metering system.

According to nick line of rabbet joint electric discharge grinding technique on small circular arc thin slice above-mentioned in the present invention, control described small circular arc thin slice by rotary main shaft and rotate with its pivot, or manually control the rotation of described small circular arc thin slice.

According to some embodiments of the present invention, larger than described line electrode diameter 10 microns-100 microns of the diameter of section of described micro groove.

Further, connect pulse power source used by micro-EDM between described small circular arc thin slice and described line electrode, wherein said small circular arc thin slice connects positive pole.

Further, when power supply is connected, adopt water base or oil base working solution as dielectric.

Prerotation vane according to a second aspect of the present invention, described prerotation vane, for processing the small ball seat surface of high pressure co-rail diesel engine fuel injector, adopts above-mentioned nick line of rabbet joint electric discharge grinding technique to make.

Prerotation vane according to a second aspect of the present invention, the micro groove with higher circular trace precision can be processed at the top end face of prerotation vane by utilizing nick line of rabbet joint electric discharge grinding technique on above-mentioned small circular arc thin slice, the micro groove simultaneously processed can mate with line electrode, be applicable to the wire of line electrode, thus be beneficial to the processing of the small spherical crown surface of indent on conductive material.

Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.

Accompanying drawing explanation

Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:

Fig. 1 is the flow chart of nick line of rabbet joint electric discharge grinding technique on small circular arc thin slice;

Fig. 2 is the calibration process schematic diagram in the center of circle at the circular arc top of small circular arc thin slice,

Wherein, Fig. 2 (a) is the top of small circular arc thin slice and the corresponding schematic diagram of datum plane,

Fig. 2 (b) is the schematic diagram of small circular arc thin slice when its O1 that slightly centers turns clockwise α,

Fig. 2 (c) is the schematic diagram of small circular arc thin slice when its O1 that slightly centers is rotated counterclockwise α;

Fig. 3 is the installation position fixing process schematic diagram of small circular arc sheet top end face and line electrode;

Fig. 4 is installation process and the processing mode schematic diagram of small circular arc sheet top end face and line electrode,

Wherein, Fig. 4 (a) is main shaft rotation mode,

Fig. 4 (b) is manual rotation mode;

Fig. 5 is the process schematic diagram of the micro groove of small circular arc sheet top end face;

Fig. 6 is the schematic diagram of the prerotation vane after processing.

Reference numeral:

Small circular arc thin slice 1; Line electrode 2; Main shaft 3; Reference block 4; Datum plane 41; Dielectric 5.

Detailed description of the invention

Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.

In describing the invention, it will be appreciated that, term " " center ", " thickness ", " on ", D score, " afterwards ", " level ", " top ", " end " " interior ", " clockwise ", the orientation of the instruction such as " counterclockwise " or position relationship be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.

In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", should to be interpreted broadly, such as, can be fixedly connected with, also can be removably connect, or to connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.

In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is less than second feature.

Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.

In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.

Below with reference to the accompanying drawings nick line of rabbet joint electric discharge grinding technique on the small circular arc thin slice 1 describing embodiment according to a first aspect of the present invention, term " small circular arc thin slice " wherein in the present invention refers to the thin slice that thickness range is about 0.2-1.0mm, and to be processed of the top end face of this small circular arc thin slice 1 is arc surface.

Owing to being mainly used for the processing of the small spherical crown surface of indent on conductive material at the top end face processing micro groove of small circular arc thin slice 1, therefore can the size Selection of small spherical crown surface matches according to indent to be processed on conductive material top end face be the small circular arc thin slice 1 of arc surface, and further micro groove be carried out to the arc surface of small circular arc thin slice 1.

As shown in Figure 1, on the small circular arc thin slice 1 of the embodiment of the present invention, the step of nick line of rabbet joint electric discharge grinding technique is as follows:

First, datum plane 41 is set, such as, a reference block 4 can be provided, the bottom surface of reference block 4 is set to datum plane 41.

Secondly, the top of small circular arc thin slice 1 is corresponded to datum plane 41, and determines the center of circle O of arc surface on small circular arc thin slice 1.Such as, after setting reference block 4, make the top of small circular arc thin slice 1 and the Contact of reference block 4, thus determine the center of circle O of arc surface on small circular arc thin slice 1.

Again, provide line electrode 2, make the axis of line electrode 2 concordant with the top end points level of small circular arc thin slice 1.Such as, shown in Fig. 3, line electrode 2 is adjusted to the horizontal direction at the plane place of small circular arc thin slice 1, and by the top end of the axis location of line electrode 2 to small circular arc thin slice 1 to be processed, thus determine the Working position of line electrode 2 and small circular arc thin slice 1.

Then, make small circular arc thin slice 1 with center of circle O for pivot rotates, and make line electrode 2 along its axis feeding to process micro groove on the top of small circular arc thin slice 1.Specifically, when small circular arc thin slice 1 rotates with its pivot, by line electrode 2 along its axis feeding (namely, line electrode 2 is relative to the horizontal feed of small circular arc thin slice 1), the slow feeding of line electrode 2 wire, thus process micro groove on the top of small circular arc thin slice 1.Wherein, line electrode 2, relative to the horizontal feed amount of small circular arc thin slice 1, can determine the radius of the micro groove on small circular arc thin slice 1 arc surface.Meanwhile, the wire feed motion of line electrode 2 can compensate the loss of small circular arc thin slice 1 in process, and this is not only conducive to the renewal of working fluid and the discharge of processing bits, can also improve machining accuracy and efficiency simultaneously.

Finally process feed line electrode 2 to reach the depth requirements of micro groove, complete the micro groove processing on small circular arc thin slice 1.

According to nick line of rabbet joint electric discharge grinding technique on the small circular arc thin slice 1 of the first aspect embodiment of invention, the process technology requirement of small circular arc thin slice 1 top end face micro groove can be reached, improve the machining accuracy of the micro groove of the top end face of small circular arc thin slice 1, the micro groove processed is mated well, with the wire of applicable line electrode 2 with line electrode 2.

According to some embodiments of the present invention, on small circular arc thin slice 1, the determination mode of the center of circle O of arc surface can be: first on small circular arc thin slice 1, preset the O1 that slightly centers, small circular arc thin slice 1 is rotated to multiple different station with the O1 that slightly centers for pivot, as shown in Figure 2, then the deviation between the center of circle O calculating arc surface on slightly center O1 and small circular arc thin slice 1, moves to the O place, the center of circle of arc surface on small circular arc thin slice 1 subsequently by pivot.Specifically, determining datum plane 41, and after making the top of small circular arc thin slice 1 correspond to datum plane 41, the center of circle O1 of thick fixed small circular arc thin slice 1, then small circular arc thin slice 1 is made to be that pivot rotates to multiple different station with O1, thus the deviation between the center of circle O calculating arc surface on slightly center O1 and small circular arc thin slice 1 in this way, and then move small circular arc thin slice to determine the center of circle O of arc surface on small circular arc thin slice 1 according to deviation.

Further, with the O1 that slightly centers for after small circular arc thin slice 1 rotates to multiple different station by pivot, be recorded in the vertical line distance, delta Ln between the top end points of the small circular arc thin slice 1 in different station place and datum plane 41, by the deviation between the center of circle O that calculates arc surface on slightly center O1 and small circular arc thin slice 1.Such as, as shown in Figure 2, with the O1 that slightly centers for pivot, turn clockwise small circular arc thin slice 1 angle [alpha], can record the distance, delta L between small circular arc thin slice 1 circular arc top and datum plane 41 ₁, then small circular arc thin slice 1 is rotated counterclockwise an angle [alpha], the distance, delta L of record now between small circular arc thin slice 1 circular arc top and datum plane 41 ₂, because the radius of the arc surface of small circular arc thin slice 1 is known, thus according to the Δ L recorded ₁with Δ L ₂deviation between the center of circle O calculating arc surface on slightly center O1 and small circular arc thin slice 1, and then eliminate this deviation by regulating, finally determine the installation site of small circular arc thin slice 1.

Further, slightly center arc surface on O1 and small circular arc thin slice 1 center of circle O between deviation value (x, y) can following formulae discovery be passed through:

$\mathrm{\θ}={\tan }^{-1}\frac{\cos \frac{\mathrm{\α}}{2}-\frac{\mathrm{\Δ}{L}_2\sin \mathrm{\α}}{(\mathrm{\Δ}{L}_1+\mathrm{\Δ}{L}_2)\sin \frac{\mathrm{\α}}{2}}}{\sin \frac{\mathrm{\α}}{2}}---\left(1\right)$

$\left\{\begin{array}{c}x=\frac{\mathrm{\Δ}{L}_2}{\sin (\mathrm{\θ}+\mathrm{\α})-\sin \mathrm{\θ}}\·\cos \mathrm{\θ}\\ y=\frac{\mathrm{\Δ}{L}_2}{\sin (\mathrm{\θ}+\mathrm{\α})-\sin \mathrm{\θ}}\·\sin \mathrm{\θ}\end{array}\right.---\left(2\right)$

Wherein, using the vertical line slightly centered between O1 and datum plane 41 as during with reference to line, α is the angle that the central axis of small circular arc thin slice 1 is clockwise about reference line and be rotated counterclockwise; Δ L1 is the vertical line distance that the central axis of small circular arc thin slice 1 turns clockwise between the top end points of small circular arc thin slice 1 after angle [alpha] and datum plane 41 about reference line; Δ L2 is that the central axis of small circular arc thin slice 1 is about the vertical line distance between the top end points of circular arc thin slice 1 small after reference line rotated counterclockwise by angle α and datum plane 41; R is the radius of arc surface on small circular arc thin slice 1; θ is calculated value.

Such as, with the O1 that slightly centers for pivot, the angle [alpha] that turned clockwise by small circular arc thin slice 1 (such as, 30 °), records the distance, delta L between small circular arc thin slice 1 circular arc top and datum plane 41 ₁(such as, Δ L ₁=0.2), then small circular arc thin slice 1 is rotated counterclockwise α (such as, 30 °), the distance, delta L of record now between small circular arc thin slice 1 circular arc top and datum plane 41 ₂(such as, Δ L ₂=0.08), if radius r=0.6 of the arc surface of small circular arc thin slice 1, formula (1) and formula (2) is utilized to obtain: x=0.280, y=0.448, thus make the O1 slightly centered move to (0.280,0.448), on coordinate, the center of circle O of arc surface on small circular arc thin slice 1 is finally determined.

In concrete example of the present invention, the vertical line distance, delta Ln between the top end points of small circular arc thin slice 1 and datum plane 41 is measured by electrical contact metering system.Such as, with the O1 that slightly centers for pivot, during the angle [alpha] that turned clockwise by small circular arc thin slice 1, electrical contact between the top making reference block 4 and small circular arc thin slice 1, can record the distance, delta L between small circular arc thin slice 1 circular arc top and datum plane 41 ₁, when small circular arc thin slice 1 is rotated counterclockwise an angle [alpha], electrical contact record between the top again making reference block 4 and small circular arc thin slice 1, can record the distance, delta L between small circular arc thin slice 1 circular arc top and datum plane 41 ₂.It is appreciated of course that the setting of datum plane 41 also can be realized by the electrical contact between reference block 4 and the top of small circular arc thin slice 1.The alignment error quantitative values of small circular arc thin slice 1 is determined by electrical contact localization method, be conducive to rapid adjustment slightly center arc surface on O1 and small circular arc thin slice 1 center of circle O between deviation, thus effectively reduce the material removal amount of micro groove processing, be conducive to improving working (machining) efficiency.

According to nick line of rabbet joint electric discharge grinding technique on small circular arc thin slice 1 above-mentioned in the embodiment of the present invention, control small circular arc thin slice 1 by rotary main shaft 3 and rotate with its pivot, or manually control the rotation of small circular arc thin slice 1.Specifically, main shaft 3 can control small circular arc thin slice 1 and rotate to multiple different station around its O1 that slightly centers, and make reference block 4 and small circular arc thin slice 1 top electrical contact at different station, thus determine the vertical line distance, delta Ln between the top end points of small circular arc thin slice 1 and datum plane 41, and then according to the deviation of geometrical relationship determination main shaft 3 axis of rotation with the O1 that slightly centers, eliminate this deviation coaxial with the center of circle of the arc surface making main shaft 3 axis of rotation and small circular arc thin slice 1.Or manually can also rotate and small circular arc thin slice 1 is rotated to different station, thus finally determine the center of circle O of small circular arc thin slice 1, after the center of circle O determining small circular arc thin slice 1, this position precise scoring lines under the microscope to go out little conical surface locating hole, with top thin rod therewith locating hole coordinate with fixing pivot (i.e. the center of circle O of small circular arc thin slice).

In the process of micro groove, by the motion of the precision rotation of main shaft 3 or fix the manual rotation motion of rotary middle point, the slow feed motion of line electrode 2 wire, line electrode 2 move relative to the horizontal feed of small circular arc thin slice 1, realizes the processing of micro groove on small circular arc thin slice 1.Wherein, the precision rotation motion of main shaft 3 or the manual rotation motion fixing rotary middle point can realize the processing of the arc track of micro groove, and the manual high-precision rotary of the precision rotation of main shaft 3 or fixing rotary middle point is conducive to the form accuracy and the processing stability that ensure micro groove.

According to some embodiments of the present invention, larger than line electrode 2 diameter 10 microns-100 microns of the diameter of section of micro groove, this micro groove be conducive on small circular arc thin slice 1 mates with line electrode 2 well, with the wire of applicable line electrode 2.

Further, connect pulse power source used by micro-EDM between small circular arc thin slice 1 and line electrode 2, wherein small circular arc thin slice 1 connects positive pole, when power supply is connected, adopt water base or oil base working solution as dielectric 5, thus be convenient to the processing to micro groove on small circular arc thin slice 1.

The prerotation vane of embodiment according to a second aspect of the present invention, can be made up of above-mentioned nick line of rabbet joint electric discharge grinding technique, and be further used for the small ball seat surface of processing high pressure co-rail diesel engine fuel injector.Certainly, the processing technology of the embodiment of first aspect present invention is also applicable to the processing of micro groove on other small circular arc thin slice 1 arc surface.

The prerotation vane of embodiment according to a second aspect of the present invention, by utilizing nick line of rabbet joint electric discharge grinding technique on above-mentioned small circular arc thin slice 1, the micro groove with higher circular trace precision can be processed at the top end face of prerotation vane, the micro groove simultaneously processed can mate with line electrode 2, be applicable to the wire of line electrode 2, thus be beneficial to the processing of the small spherical crown surface of indent on conductive material.

In an embodiment of the present invention, for Fig. 2-Fig. 6, the nick line of rabbet joint electric discharge grinding technique of prerotation vane top end face is described.After prerotation vane is tentatively installed, the central axis position of the given line electrode 2 of initial position and prerotation vane, by the top alignment fiducials block 4 of the arc surface of prerotation vane, make between prerotation vane and reference block 4, to realize electrical contact to operate, get final product the position of reference-calibrating plane 41, as shown in Fig. 2 (b), now the pivot of prerotation vane is the O1 that slightly centers.As shown in Fig. 2 (a), to be driven by main shaft 3 or manual rotation prerotation vane is rotated clockwise to certain angle [alpha], make reference block 4 and the top electrical contact of prerotation vane, the distance, delta L between prerotation vane top and datum plane 41 can be recorded ₁, as shown in Fig. 2 (c), main shaft 3 drives or manual rotation prerotation vane rotates counterclockwise certain angle [alpha], again makes reference block 4 and the top electrical contact of prerotation vane, can record the distance, delta L between prerotation vane top and datum plane 41 ₂the radius of the arc surface of known prerotation vane is r, according to formula (1) and formula (2), installation deviation value x and the y of the O1 that slightly centers of main shaft 3 axle center or manual rotation center and prerotation vane arc surface can be calculated, according to deviant (x, y) position of slightly center O1 and the manual rotation central point of slightly center relative position between O1 and main shaft 3 or the prerotation vane of prerotation vane is adjusted, to make the coaxial installation of center of circle O of the arc surface of the axle center of main shaft 3 or manual rotation central point and prerotation vane.

Such as, with the O1 that slightly centers for pivot, prerotation vane is turned clockwise 30 °, after prerotation vane and reference block 4 electrical contact, the distance recorded between prerotation vane circular arc top and datum plane 41 is 0.2, then prerotation vane is rotated counterclockwise 30 °, after prerotation vane and reference block 4 electrical contact, records the distance, delta L now between prerotation vane circular arc top and datum plane 41 ₂=0.08, the radius of the arc surface of known prerotation vane is 0.6, formula (1) and formula (2) is utilized to obtain: x=0.280, y=0.448, thus determine the center of circle O of arc surface on prerotation vane, make the coaxial installation of center of circle O of the arc surface of the axle center of main shaft 3 or manual rotation central point and prerotation vane.

As shown in Figure 3 and Figure 4, after the center of circle O of the arc surface of main shaft 3 axle center or manual rotation center and prerotation vane is coaxial, line electrode 2 is adjusted to the horizontal direction at prerotation vane plane place, and by the apical position place of line electrode 2 axis location to the prerotation vane of micro groove to be processed.It should be noted that herein, after the center of circle O of the arc surface of manual rotation central point and prerotation vane is coaxial, this position precise scoring lines is under the microscope to go out little conical surface locating hole, with with top thin rod therewith locating hole coordinate with fixed manual pivot (i.e. the center of circle O of prerotation vane), thus achieve the manual rotation location of the core of the jumping of footpath without spin error.

As shown in Figure 5, after line electrode 2 and the arc surface of prerotation vane are installed and are located, the arc surface and line electrode 2 of prerotation vane connect pulse power source used by micro-EDM, adopt positive polarity processing mode (prerotation vane connects pulse power positive pole), utilize water base or oil base working solution as dielectric 5, then by the motion of the precision rotation of main shaft 3 or the manual high-precision rotary motion fixing rotary middle point, the slow feed motion of line electrode 2 wire, line electrode 2 moves relative to the horizontal feed of prerotation vane, carry out the electric discharge Grinding Process between line electrode 2 and prerotation vane.

Line electrode 2 is gradually to the direction feeding of the arc surface of prerotation vane, until the micro groove working depth of prerotation vane arc surface reaches set depth, such as set depth is 0.02mm, machines the micro groove that obtains as shown in Figure 6.

In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.

Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.

Claims (10)

1. a nick line of rabbet joint electric discharge grinding technique on small circular arc thin slice, to be processed of wherein said small circular arc sheet top end face is arc surface, it is characterized in that, comprises the following steps:

S1, datum plane is set;

S2, the top of described small circular arc thin slice is corresponded to described datum plane, and determine the center of circle O of arc surface on described small circular arc thin slice;

S3, provide line electrode, make the axis of described line electrode concordant with the described top end points level of described small circular arc thin slice;

S4, make described small circular arc thin slice with described center of circle O for pivot rotates, and make described line electrode along its axis feeding to process micro groove on the described top of described small circular arc thin slice;

Described in S5, processing feeding, line electrode is to reach the depth requirements of described micro groove.

2. nick line of rabbet joint electric discharge grinding technique according to claim 1, it is characterized in that, described step S2 comprises following concrete steps:

S21, on described small circular arc thin slice preset the O1 that slightly centers, for pivot, described small circular arc thin slice is rotated to multiple different station with the described O1 that slightly centers, the deviation between the center of circle O calculating arc surface on described slightly center O1 and described small circular arc thin slice;

S22, described pivot is moved to the O place, the center of circle of arc surface on described small circular arc thin slice.

3. nick line of rabbet joint electric discharge grinding technique according to claim 2, it is characterized in that, described step S21 also comprises:

S211, with the described O1 that slightly centers for after described small circular arc thin slice rotates to multiple different station by pivot, be recorded in the vertical line distance, delta Ln between the top end points of small circular arc thin slice described in different station place and described datum plane;

S212, by the deviation between the center of circle O that calculates arc surface on described slightly center O1 and described small circular arc thin slice.

4. nick line of rabbet joint electric discharge grinding technique according to claim 3, it is characterized in that, in described step S212, on described slightly center O1 and described small circular arc thin slice arc surface center of circle O between deviation value (x, y) by following formulae discovery:

$\mathrm{\θ}={\tan }^{-1}\frac{\cos \frac{\mathrm{\α}}{2}-\frac{\mathrm{\Δ}{L}_2\sin \mathrm{\α}}{({\mathrm{\ΔL}}_1+\mathrm{\Δ}{L}_2)\sin \frac{\mathrm{\α}}{2}}}{\sin \frac{\mathrm{\α}}{2}}---\left(1\right)$

$\left\{\begin{array}{c}x=\frac{\mathrm{\Δ}{L}_2}{\sin (\mathrm{\θ}+\mathrm{\α})-\sin \mathrm{\θ}}\·\cos \mathrm{\θ}\\ y=\frac{\mathrm{\Δ}{L}_2}{\sin (\mathrm{\θ}+\mathrm{\α})-\sin \mathrm{\θ}}\·\sin \mathrm{\θ}\end{array}\right.---\left(2\right)$

Wherein, using the described vertical line slightly centered between O1 and described datum plane as during with reference to line, α is the angle that the central axis of described small circular arc thin slice is clockwise about described reference line and be rotated counterclockwise;

Δ L1 is the vertical line distance that the central axis of described small circular arc thin slice turns clockwise between the top end points of described small circular arc thin slice after angle [alpha] and described datum plane about described reference line;

Δ L2 is that the central axis of described small circular arc thin slice is about the vertical line distance between the top end points of small circular arc thin slice described after described reference line rotated counterclockwise by angle α and described datum plane;

R is the radius of arc surface on described small circular arc thin slice;

θ is calculated value.

5. nick line of rabbet joint electric discharge grinding technique according to claim 3, it is characterized in that, the vertical line distance, delta Ln between the top end points of described small circular arc thin slice and described datum plane is measured by electrical contact metering system.

6. the nick line of rabbet joint electric discharge grinding technique according to any one of claim 1-5, is characterized in that, control described small circular arc thin slice and rotate with its pivot, or manually control the rotation of described small circular arc thin slice by rotary main shaft.

7. nick line of rabbet joint electric discharge grinding technique according to claim 1, is characterized in that, larger than described line electrode diameter 10 microns-100 microns of the diameter of section of described micro groove.

8. nick line of rabbet joint electric discharge grinding technique according to claim 7, it is characterized in that, connect pulse power source used by micro-EDM between described small circular arc thin slice and described line electrode, wherein said small circular arc thin slice connects positive pole.

9. the nick line of rabbet joint according to claim 8 electric discharge grinding technique, is characterized in that, when power supply is connected, adopts water base or oil base working solution as dielectric.

10. a prerotation vane, described prerotation vane, for processing the small ball seat surface of high pressure co-rail diesel engine fuel injector, is characterized in that, adopts the electric discharge of the nick line of rabbet joint according to any one of claim 1-9 grinding technique to make.