CN106112153B - Nc wire-cutting molybdenum filament vertical survey bearing calibration and device - Google Patents
Nc wire-cutting molybdenum filament vertical survey bearing calibration and device Download PDFInfo
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- CN106112153B CN106112153B CN201610592301.7A CN201610592301A CN106112153B CN 106112153 B CN106112153 B CN 106112153B CN 201610592301 A CN201610592301 A CN 201610592301A CN 106112153 B CN106112153 B CN 106112153B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
- B23H7/08—Wire electrodes
Abstract
The invention discloses a kind of nc wire-cutting molybdenum filament vertical survey bearing calibration and device, wherein measurement means for correcting includes：Located at the upper set of coils of molybdenum filament straight line active section radial outside；Located at the lower coil group of the molybdenum filament straight line active section radial outside and arranged for interval below the upper set of coils, the lower coil group is identical with the structure of the upper set of coils, and the two in the vertical direction overlaps arrangement；High-frequency pulse current is passed through to the molybdenum filament straight line active section, so as to produce alternating magnetic field around it and then make the high frequency electric source that induced voltage is produced in upper set of coils and the lower coil group；And be connected with the upper set of coils and lower coil group and can obtain and the upper set of coils and lower coil group in induced voltage signal processing circuit.The device can realize molybdenum wire verticality X, the direction of Y-axis two simultaneously non-cpntact measurement, avoid the error caused by secondary mobile work platform.
Description
Technical field
The present invention relates to wire cutting machine tool field, and in particular to a kind of nc wire-cutting molybdenum filament vertical survey bearing calibration
And device.
Background technology
Linear cutter is to make electrode using the fine wire of continuous moving, and pulse spark electric discharge removal gold is carried out to workpiece
Category or excision forming, the equipment are mainly used in processing superhard steel, hard alloy, the work that variously-shaped complicated and precision is tiny
Part.Wire electrode is that (commonly referred to as molybdenum filament, this patent are mainly used in hurrying up a kind of fine wire being fabricated by noble metals such as molybdenums
Silk cutting machine tool), molybdenum filament is discharged by medium (electrolyte) with workpiece, and corrosion metal reaches the purpose of excision forming.
In recent years, with the continuous development of automatic technology, various digital control wire-electrode cutting equipment in electric machining industry by
Gradually popularize, the technology such as its mechanical precision, position-force control, high frequency electric source has all reached higher level, still, as electric discharge electricity
The molybdenum filament of pole, its vertical detection technology relatively lag behind, and are always to hinder the gentle influence machining accuracy of linear cutting equipment Automated water
One of the main reason for.Molybdenum filament vertically refers to that wire electrode is vertical with X, Y-axis table plane, because the perpendicularity pair of wire electrode adds
The influence of work precision is very big, so must carry out the vertical correction of molybdenum filament before equipment processing.At present, line cutting electrode silk is (following
Abbreviation molybdenum filament) vertical correction has following two methods：
1st, discharge spark vertical correction method
Existing wire cutting vertical correction majority is all using the method for the centering that discharged under anhydrous low current state, and specific steps are such as
Under：Mobile X-axis makes molybdenum filament close to correcting block (metal correcting block：One piece of each plane is parallel to each other or vertical rectangle metallic object)
A side, to there is slight discharge spark, by estimating molybdenum filament and correcting block side can contact the equal of discharge spark in length
Even degree, such as occur in upper end or lower end only have one end have spark, illustrate that the end is near from correcting block lateral distance, and the other end from
Correcting block side is remote, and molybdenum filament out of plumb needs to correct；As upper and lower spark uniformity, molybdenum filament are vertical with respect to X-axis.Then work is moved
Make platform, molybdenum filament is contacted into another neighboring vertical side of correcting block with same method, vertical school of the molybdenum filament with respect to Y-axis can also be completed
Just.Above-mentioned molybdenum filament vertical detection method is the method generally used in current linear cutter, and this method mainly has following lack
Point：1), because using artificial range estimation, the human factor dependence such as technical merit and experience to operator is strong；2), visual method
Error is larger, and the uniformity adjusted every time cannot be guaranteed, have a strong impact on product quality；3), timing must carry out electric discharge cutting,
Centering is judged by electric spark uniformity coefficient, belongs to contact type measurement, because the factors such as Discharge Force effect influence, easily causes survey
Measure error.4) vertical correction in one direction of X (or Y) axle can only, be made every time, it is necessary to which secondary mobile work platform could be to another
Axle is corrected, and easily produces measurement error；5) full-automatic vertical correction, can not be realized, can only according to present case, by U,
V shaft step motors manually vertical correction；
2nd, wire cutting electronics instruction vertical correction instrument
Electronics instruction vertical correction instrument (hereinafter referred to as rectifier), two hard contact (corresponding two fingers are up and down used
Show lamp), to form closed-loop path by being contacted with molybdenum filament and light indicator lamp, this method must adjust repeatedly just can ensure that up and down
" " contact (precision is just guaranteed), specifically used method is as follows simultaneously：Wire electrode necessarily be in inactive state, and rectifier is adsorbed
On work top, upper and lower two hard contacts are carried on rectifier, along X-axis, (or Y-axis can only correct one to workbench every time
Individual direction) direction movement, rectifier contact is gently contacted with wire electrode, if only up or down lamp is bright, illustrate wire electrode not
Vertically, idler positions should be adjusted, until upper and lower lamp is simultaneously bright, the direction reaches vertical correction requirement.Hung down to accurate adjustment
Straight correction, it is necessary to be repeatedly detected, adjust, until upper and lower lamp is " simultaneously " bright.This method mainly has the disadvantage that：
1st, electronic calibration instrument can only could detect in inactive state, and wire feeder is extremely complex, depend merely on inactive state inspection
Survey can not represent equipment real-world operation situation completely.
2nd, electronic calibration instrument employs contact type measurement, easily causes measurement error by contact molybdenum filament.
3rd, in order to ensure two contacts " simultaneously " contact up and down, it is still necessary to estimate that upper and lower lamp is " simultaneously " bright, to the warp of operator
It is high to test requirement, uniformity can not ensure, easily cause measurement error.
4th, it is not in contact with distance between contact and molybdenum filament completely by range estimation, i.e., another after contact lamp in one of upper and lower two contact is bright
Contact is to know with molybdenum filament distance, and regulation difficulty is larger.
5th, the vertical correction in one direction of X (or Y) axle can only be made every time, it is necessary to which secondary mobile work platform could detect another
Axle, easily produce measurement error.
6th, due to being the detection of simple switch amount, it can not be docked with digital control system and form automatic vertical correction.
Above mentioned problem is not effectively improved always for many years, and its corresponding e measurement technology also lags very much.Therefore, change
Become the backwardness of molybdenum filament vertical correction technology, make more scientific alignment technique, wisdom, automation and precision to numerical control
Line cutting technology progress has great importance.
The content of the invention
The present invention seeks to：In view of the above-mentioned problems, the present invention provides a kind of nc wire-cutting molybdenum filament vertical survey correction
Method and apparatus, the device can realize molybdenum wire verticality X, the direction of Y-axis two simultaneously non-cpntact measurement, avoid secondary mobile work
Make the error caused by platform.
The technical scheme is that：
This nc wire-cutting molybdenum filament vertical survey bearing calibration provided by the present invention, in nc wire-cutting molybdenum filament
The upper and lower part of straight line active section be respectively arranged two structures it is consistent and the line positioned at molybdenum filament straight line active section radial outside
Circle group, and the two coil groups are overlapped in vertical direction and arranged, high-frequency pulse current is passed through to the molybdenum filament straight line active section,
So as to produce alternating magnetic field around molybdenum filament straight line active section, and then induced voltage is produced in described two coil groups, obtained
And induced voltage in more described two coil groups, and calculate according to comparative result the deviation of molybdenum filament straight line active section perpendicularity
Direction and deviation, then being adjusted the perpendicularity of molybdenum filament straight line active section according to the bias direction and deviation will to satisfaction
Ask.
This nc wire-cutting molybdenum filament vertical survey means for correcting provided by the present invention, including：
Located at the upper set of coils of molybdenum filament straight line active section radial outside；
The lower coil below the upper set of coils located at the molybdenum filament straight line active section radial outside and arranged for interval
Group, the lower coil group is identical with the structure of the upper set of coils, and the two in the vertical direction overlaps arrangement；
High-frequency pulse current is passed through to the molybdenum filament straight line active section, so as to produce alternating magnetic field around it and then make
The high frequency electric source of induced voltage is produced in upper set of coils and the lower coil group；And
It is connected with the upper set of coils and lower coil group and can obtains and the upper set of coils and lower coil group
The signal processing circuit of middle induced voltage.
The measurement means for correcting is on the basis of above-mentioned technical proposal, in addition to following preferred scheme：
The signal processing circuit includes differential amplifier circuit and the institute being connected with the upper set of coils and lower coil group
State the connected filter circuit of differential amplifier circuit and the A/D change-over circuits being connected with the filter circuit.
The stepper motor and the stepper motor that the nc wire-cutting includes digital control system, is connected with the digital control system
Connected taper adjusting device, the signal processing circuit are connected with the digital control system, and the signal processing circuit is obtained
The magnitude difference signal of induced voltage is transmitted to the digital control system in the upper set of coils and the lower coil group that take, described
Digital control system goes out the perpendicularity deviation value of the molybdenum filament straight line active section according to the magnitude difference signal of change, and vertical according to this
Spending deviation controls the stepper motor to drive the taper adjusting device action, to adjust hanging down for the molybdenum filament straight line active section
Straight degree.
The upper set of coils is made up of the X of circular arc to the Y-direction coil of coil and circular arc, and the X is to coil
It is split-type structural with Y-direction coil, and the two vertical distribution one on the other；
The lower coil group is made up of the X of circular arc to lower coil and Y-direction lower coil, and the X is offline to lower coil and Y-direction
Enclose as split-type structural, and the two vertical distribution one on the other；
The X surround to lower coil and Y-direction lower coil to coil, Y-direction coil, X and is arranged in the molybdenum filament straight line
The radial outside of active section.
The measurement pedestal that also includes being arranged on the nc wire-cutting, it is fixed on the measurement pedestal and one on the other
The upper substrate and infrabasal plate that are spaced apart, the upward magnetic of X for being removably mounted on the upper substrate upper and lower surface respectively
Magnetic under magnetic core, the downward magnetic cores of X for being removably mounted on the infrabasal plate upper and lower surface respectively and Y-direction on core and Y-direction
Core, magnetic core is arc-shaped structure under magnetic core, the downward magnetic cores of X and Y-direction on the upward magnetic core of the X, Y-direction, the X to coil and
Y-direction coil is respectively wound around in the upward magnetic cores of the X and Y-direction on magnetic core, and the X is twined respectively to lower coil and Y-direction lower coil
It is wound under the downward magnetic cores of the X and Y-direction on magnetic core.
Measurement pedestal, upper substrate and the infrabasal plate are marble material.
Respectively it is provided with an arc notch on the upper substrate and infrabasal plate, magnetic core point on the upward magnetic core of the X and Y-direction
Not An Zhuan the upper substrate the arc notch inwall on the upside of and inwall on the downside of, magnetic core under the downward magnetic core of the X and Y-direction
It is separately mounted on the upside of the inwall of the arc notch of the infrabasal plate and on the downside of inwall.
It is fixedly installed on the measurement pedestal and touches side to zero piece.
The high frequency electric source be the nc wire-cutting cutting power supply, in addition to grounding resistance, selecting switch, with it is described
The connected upper conducting block in molybdenum filament straight line active section upper end, the lower conducting block being connected with the molybdenum filament straight line active section lower end, it is described
Upper conducting block is connected with the high frequency electric source by wire, and the lower conducting block selects by the action with the selecting switch
It is connected with the grounding resistance or the high frequency electric source to property.
It is an advantage of the invention that：
1st, the present apparatus uses contactless measurement, avoids as the error caused by measurement apparatus contact molybdenum filament.
2nd, the present apparatus uses contactless measurement, and (electronics school can not only be detected under wire feeder inactive state
Positive instrument method can only measure under molybdenum filament inactive state), additionally it is possible to wire feeder is being opened, i.e., under molybdenum filament is kept in motion
Vertical correction.Realize the molybdenum filament vertical correction under the actual dynamic duty environment of wire feeder.
3rd, this measuring method overcomes artificial range estimation correcting block electric discharge aligning method, and caused human factor influences and precision
Low shortcoming；Meanwhile it also avoid the requirement of electronic calibration instrument method up and down two contacts must " range estimation is simultaneously " contact it is artificial because
Element influences.
4th, this measuring method is realized X, the direction of Y-axis two while measured, and avoids the error caused by secondary mobile work platform.
5th, spark correction method and electronic calibration instrument method are touched, it is necessary to repeated multiple times mobile work platform carries out contact measurement, and
The present apparatus uses non-cpntact measurement, easy to operate, without repeated multiple times mobile work platform.
6th, the present apparatus uses dynamic and static no-spark vertical correction, touches spark without between same correcting block, avoids electric discharge
Measurement error caused by power, while also save the energy.
7th, couple with digital control system, wire cutting, can be realized at the shaft step motor in the direction of adjust automatically two according to measurement result
Vertical automatic correction.
8th, the system also has a range of taper detection function, after taper is set, can be entered by the system
Row accurate measurement, check and correction.
9th, using upper and lower two measurement apparatus, by the way that than surveying measuring method, perpendicularity index can be accurately measured.
The present invention it is ingenious using wire cutting molybdenum filament electrode be a straight wire, and flowed through in straight wire electrode pulsating current this
Favourable measuring condition, by two coils up and down on pedestal, the radial position information of non-cpntact measurement molybdenum filament, accurately
Ground calculates perpendicularity index, the methods of avoiding electric discharge centering human factor it is big, the shortcomings of measurement accuracy difference.Meanwhile line is cut
The non-contact detecting of molybdenum filament is cut, avoids the error caused by various contact measurement methods, lifts vertical correction precision.With number
Control system connect, can also by control shaft step motor realize automatic vertical correct, or even can transform as with certain taper measure
The device of function.The present invention realizes non-contact dynamic and static vertical correction, further to improve Numerical Control Wire Cutting quality, tool
There are very high practical value and economic benefit.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment the invention will be further described：
Fig. 1 is that the overall structure of this nc wire-cutting molybdenum filament vertical survey means for correcting of the embodiment of the present invention is illustrated
Figure；
Fig. 2 is the partial structural diagram of this nc wire-cutting molybdenum filament vertical survey means for correcting of the embodiment of the present invention
One of；
Fig. 3 is the partial structural diagram of this nc wire-cutting molybdenum filament vertical survey means for correcting of the embodiment of the present invention
Two；
Fig. 4 is the partial structural diagram of this nc wire-cutting molybdenum filament vertical survey means for correcting of the embodiment of the present invention
Three；
Wherein：1- molybdenum filaments, 101- molybdenum filament straight line active sections, 2- upper set of coils, 201-X is to coil, and 202-Y is to reaching the standard grade
Circle, 3- lower coil groups, 301-X is to lower coil, and 302-Y is to lower coil, 4- high frequency electric sources, 5- signal processing circuits, 6- numerical controls system
System, 7- stepper motors, 8- taper adjusting devices, 9- measurement pedestals, 10- upper substrates, 11- infrabasal plates, the upward magnetic cores of 12a-X,
The upward magnetic cores of 12b-Y, the downward magnetic cores of 13a-X, the downward magnetic cores of 13b-Y, 14- touch side to zero piece, the upper conducting blocks of 15-, conductive under 16-
Block, 17- grounding resistances, 18- selecting switch, 19- molybdenum filament upper blocks, 20- molybdenum filament lower tumblers, the upper filar guides of 21-, seal wire under 22-
Device.
Embodiment
Fig. 1~Fig. 4 illustrates a specific reality of this nc wire-cutting molybdenum filament vertical survey means for correcting of the present invention
Apply example, it is well known that the molybdenum filament 1 of nc wire-cutting includes being used for cutting the molybdenum filament straight line active section 101 of workpiece, and the present apparatus
Exactly it is used for the perpendicularity for measuring and correcting the molybdenum filament straight line active section 101.Nc wire-cutting include digital control system 6, with
The connected stepper motor 7 of the digital control system, the taper adjusting device 8 being connected with the stepper motor, taper adjusting device 8 and molybdenum filament
The upper block connection of straight line active section 101, during practical application, taper adjusting device 8 is driven to act by the stepper motor 7,
And then the position of upper block is adjusted by the action of taper adjusting device 8, so as to adjust the vertical of molybdenum filament straight line active section 101
Degree.
This nc wire-cutting molybdenum filament vertical survey means for correcting of the present embodiment mainly includes upper set of coils 2, lower coil
Group 3, high frequency electric source 4 and signal processing circuit 5, wherein：Upper set of coils 2 and lower coil group 3 are arranged in the molybdenum filament straight line of molybdenum filament
The radial outside of active section 101, and the two arranged for interval one on the other.Meanwhile the structure of lower coil group 3 and upper set of coils 2
Identical (length, radius, winding number etc. are consistent), and the two overlaps arrangement on vertical direction (i.e. Z-direction), i.e., the two is in X and Y
The position consistency in direction.High frequency electric source 4 be used for molybdenum filament molybdenum filament straight line active section 101 be passed through high-frequency pulse current, so as to
The surrounding of molybdenum filament straight line active section 101 produces alternating magnetic field and then makes to produce induced electricity in the upper set of coils 2 and lower coil group 3
Pressure.Signal processing circuit 5 is respectively connected with the upper set of coils 2 and lower coil group 3, is sensed so as to obtain in upper set of coils 2
The magnitude difference of induced voltage in voltage and lower coil group 3.
During practical application, high frequency electric source 4 is passed through high-frequency pulse current to the molybdenum filament straight line active section 101 of molybdenum filament, so that
The surrounding of molybdenum filament straight line active section 101 produces alternating magnetic field, and then produces induced voltage in upper set of coils 2 and lower coil group 3.
It can be appreciated that because molybdenum filament electric current is completely the same, and coil at molybdenum filament electric current and lower coil group 3 at upper set of coils 2
Group is also identical with the structure of lower coil group, thus in upper set of coils 2 and lower coil group 3 induced voltage magnitude difference and line
Enclose relevant with the relative position that the work of molybdenum filament straight line is intersegmental.If the molybdenum filament straight line active section 101 of molybdenum filament is completely vertical, then it
It is then identical in upper set of coils 2 and the relative position in lower coil group 3, then caused sense in upper set of coils 2 and lower coil group 3
Answer voltage equal, i.e., the magnitude difference of induced voltage is zero in upper set of coils 2 and lower coil group 3.If the and molybdenum filament straight line of molybdenum filament
Active section 101 simultaneously non-fully vertically has certain angle of inclination, then molybdenum filament straight line active section 101 is in the He of upper set of coils 2
Relative position in lower coil group 3 is then different, then and the difference of induced voltage is nonzero value in upper set of coils 2 and lower coil group 3,
In general, the angle of inclination of molybdenum filament straight line active section 101 is bigger, and the difference of the induced voltage is then bigger.Upper set of coils 2 produces
Induced voltage and lower coil group 2 caused by induced voltage be transmitted separately to signal processing circuit 5, obtained by the signal processing circuit
The magnitude difference of two induced voltages is taken, judges simultaneously display output, if induced voltage difference is zero, illustrates that molybdenum filament straight line works
Section is completely vertical, it is not necessary to adjusts；If induced voltage difference is nonzero value and the nonzero value is more than predetermined threshold value, illustrate molybdenum
Silk straight line active section perpendicularity is poor, it is necessary to adjust the perpendicularity of molybdenum filament straight line active section 101.
In the present embodiment, the signal processing circuit 5 includes the difference being connected with the upper set of coils 2 and lower coil group 3
Dynamic amplifying circuit, the filter circuit being connected with the differential amplifier circuit and the A/D conversion electricity being connected with the filter circuit
Road.In use, induced voltage signal input differential amplifier circuit first input port of upper set of coils 2, the induced electricity of lower coil group 3
Signal input differential amplifier circuit second input port is pressed, after differential amplifier circuit is amplified processing to signal, by its output end
A/D change-over circuits are accessed after filtered circuit filtering.
In order to realize automatically controlling to the stepper motor 7, automatically adjusting for molybdenum filament straight line active section perpendicularity is realized,
The signal processing circuit 5 is connected by the present embodiment with the digital control system 6.During work, the signal processing circuit 5 is obtained
The magnitude difference signal of induced voltage is transmitted to the digital control system 6, numerical control in the upper set of coils 2 and the lower coil group 3 that take
System 6 goes out the perpendicularity deviation value of the molybdenum filament straight line active section 101 according to the magnitude difference signal of change, and is hung down according to this
Straight degree deviation control stepper motor 7 drives the taper adjusting device 8 to act, to adjust the molybdenum filament straight line active section 101
Perpendicularity.
In order to improve the measurement accuracy to molybdenum filament straight line active section perpendicularity, while it is easy to calculate molybdenum filament straight line active section
The upper set of coils 2 and coil 3 are arranged to following structure type by the deviation of perpendicularity, the present embodiment：Upper set of coils 2 is by justifying
The X of arc is formed to the Y-direction coil 202 of coil 201 and circular arc, and the X is to coil 201 and Y-direction coil 202
Split-type structural, and the two vertical distribution one on the other.Lower coil group 3 is from the X of circular arc to lower coil 301 and Y-direction lower coil
302 are formed, the X to lower coil 301 and Y-direction lower coil 302 be split-type structural, and the two vertical distribution one on the other.And
And the X surround to lower coil 301 and Y-direction lower coil 302 to coil 201, Y-direction coil 202, X and is arranged in the molybdenum
The radial outside of silk straight line active section 101.
During work, X to coil 201 and X to lower coil 301 it is corresponding for measurement molybdenum filament straight line active section 101 in X
The perpendicularity deviation in direction, Y-direction coil 202 and Y-direction lower coil 302 are corresponding for measurement molybdenum filament straight line active section 101
Perpendicularity deviation in the Y direction.If molybdenum filament straight line active section 101 is good in the perpendicularity of X-direction, that is, measure molybdenum filament straight line work
It is equal to the X-axis coordinate at lower coil 301 with X to coil 201 in X to make section 101, then X is to coil 201 and X to offline
Induced voltage in circle 301 is equal；If molybdenum filament straight line 101 perpendicularity in the Y direction of active section is good, that is, measure molybdenum filament straight line
X-axis coordinate of the active section 101 at Y-direction coil 202 with Y-direction lower coil 302 is equal, then under Y-direction coil 202 and Y-direction
Induced voltage in coil 302 is equal.Induced voltage only in X to coil 201 with from X to lower coil 301 is equal, and Y
To coil 202 and Y-direction lower coil 302 induced voltage it is also equal when, just show that molybdenum filament straight line active section 101 has standard
Perpendicularity.If the perpendicularity of molybdenum filament straight line active section is poor, radial position of the molybdenum filament straight line active section in upper set of coils 2 and
Radial position in lower coil group 3 is inconsistent, then X has different induced electricities to coil 201 and X to lower coil 301
Pressure, or Y-direction coil 202 and Y-direction lower coil 302 have different induced voltages.It is of course also possible to X is to the He of coil 201
X to lower coil 301 there is different induced voltages while, also have in Y-direction coil 202 and Y-direction lower coil 302 different
Induced voltage.According to X to coil 201 and X into lower coil 301 under induced voltage difference and Y-direction coil 202 and Y-direction
Induced voltage difference can be counted easily (known to molybdenum filament medium-high frequency pulse current size and loop structure) in coil 302
Grid deviation of the molybdenum filament straight line active section 101 in X-direction and Y-direction is calculated, so as to control stepper motor to act, makes vertical missing
Progressively reduce, until meeting vertical correction index.
The mounting arrangements of the upper set of coils 2 and lower coil group 3, the present embodiment are also provided with being arranged in numerical control for convenience
Measurement pedestal 9 on wire cutting machine, it is fixed on the upper substrate 10 and infrabasal plate being spaced apart on the measurement pedestal 9 and one on the other
11st, be removably mounted on respectively magnetic core 12b on the upward magnetic core 12a of X and Y-direction of the upper and lower surface of upper substrate 10,
Be removably mounted on respectively the upper and lower surface of infrabasal plate 11 the downward magnetic core 13a of X and Y-direction under magnetic core 13b.It is described
Magnetic core 13b is arc-shaped structure under the downward magnetic core 13a of magnetic core 12b, X and Y-direction on the upward magnetic core 12a of X, Y-direction, and the X is upward
Coil 201 and Y-direction coil 202 are respectively wound around in the upward magnetic core 12a of the X and Y-direction on magnetic core 12b, and the X is to lower coil
301 and Y-direction lower coil 302 be respectively wound around under the downward magnetic core 13a of the X and Y-direction on magnetic core 13b.
The bottom surface of measurement pedestal 9 is parallel with the Cutting platform of nc wire-cutting, plane and lower magnetic where upper magnetic core 12
Plane where core 13 is also parallel with the Cutting platform of nc wire-cutting.
It is marble material that pedestal 9, upper substrate 10 and infrabasal plate 11 are measured described in the present embodiment, and it has exhausted magnetic special
Point.Magnetic core 13b cross section is circle under the downward magnetic core 13a of magnetic core 12b, X and Y-direction on the upward magnetic core 12a of the X, Y-direction.
In order to facilitate the arrangement of relative position between molybdenum filament straight line active section 101 and upper lower coil group, the present embodiment is in institute
State and an arc notch is respectively provided with upper substrate 10 and infrabasal plate 11,12b points of magnetic core in the upward magnetic core 12a of the X and Y-direction
Not An Zhuan the upper substrate 10 the arc notch inwall on the upside of and inwall on the downside of, the downward magnetic core 13a of the X and Y-direction
Lower magnetic core 13b is separately mounted on the upside of the inwall of the arc notch of the infrabasal plate 11 and on the downside of inwall.
In addition, the present embodiment is further fixedly arranged on one on the measurement pedestal 9 touches side to zero piece 14, this touches side to zero
Block 14 and the 10 horizontal flush arrangement of upper substrate.During practical application, side can be touched by this to zero piece of 14 feeler block small change point,
Zero piece 14 to upper set of coils 2 or lower coil group central point relative displacement are fixed due to touching side, so once in outside to zero
After point, usable digital control system makes molybdenum filament automatically along track, is arrived by the entrance (i.e. above-mentioned arc notch) of upper and lower coil group
Up to center.
In the present embodiment, the high frequency electric source 4 directly uses the cutting power supply of the nc wire-cutting, is additionally provided with ground connection
Resistance 17, selecting switch 18, the upper conducting block 15 being connected with the upper end of molybdenum filament straight line active section 101 and the molybdenum filament straight line
The connected lower conducting block 16 in the lower end of active section 101.The upper conducting block 15 is connected with the high frequency electric source 4 by wire, described
Lower conducting block 16 by the action with the selecting switch 18 and optionally with the grounding resistance 17 or the high frequency electric source 4
It is connected.
The general principle of the above-mentioned design of the present embodiment is as follows：Molybdenum filament active section (also known as line electrode) this as wire always,
And what is flowed through in line electrode is dither current, thus alternating magnetic field is produced around it, the size of this magnetic field intensity is with leading
Electric current in line and relevant with conductor spacing, i.e.,
In above formula (1), μ0It is space permeability, is physical constant；B is magnetic field intensity.
During measurement, selecting switch 18 is pushed into measurement position (such as Fig. 1), conducting block 16 is connect by grounding resistance 17 at present for this
High frequency electric source, high frequency electric source, conducting block, molybdenum filament, lower conducting block and grounding resistance form closed-loop path, molybdenum filament straight line active section
In flow through and have dither current, induced field intensity of the electric current in each coil of upper and lower coil group is shown in formula (1).
Obviously, X is identical with the electric current of X to molybdenum filament at lower coil 301 to coil 201, due in coil induced voltage and Δ B into
Direct ratio, and electric currents of the X to coil 201 and X into molybdenum filament at lower coil 301 is completely the same, thus X to coil 201 and X to
Only relevant with the radial position of molybdenum filament (grounding resistance size is certain, molybdenum filament electric current in the induced electricity pressure difference of X-direction for lower coil 301
It is known), if X is good to perpendicularity, molybdenum filament straight line active section top and X are to the radial position of coil 201 and molybdenum filament straight line
Work pars infrasegmentalis is consistent with X to the radial position of lower coil 301, so X is to coil 201 and X to the induced electricity of lower coil 301
Press it is identical, it is differential amplification output be zero.But in practice, because a variety of causes causes molybdenum filament straight line active section perpendicularity to have deviation,
Then upper and lower side X is inconsistent to position, and the more big then induced voltage difference of deviation is higher.Similarly, be able to can be measured with same method
The perpendicularity of Y direction.When being measured using the present apparatus, digital control system can manually or automatically adjustment axis stepping if out of plumb
Motor, it is gradually reduced perpendicularity deviation, until meeting vertical correction index.Similarly, Y-axis can also use this method to realize certainly
Dynamic adjustment.
Certainly, the above embodiments merely illustrate the technical concept and features of the present invention, and its object is to make people much of that
Solution present disclosure is simultaneously implemented according to this, and it is not intended to limit the scope of the present invention.It is all according to major technique of the present invention
The equivalent transformation or modification that the Spirit Essence of scheme is done, should all be included within the scope of the present invention.
Claims (10)
- A kind of 1. nc wire-cutting molybdenum filament vertical survey bearing calibration, it is characterised in that：In nc wire-cutting molybdenum filament straight line The upper and lower part of active section be respectively arranged two structures it is consistent and the coil positioned at molybdenum filament straight line active section radial outside Group, and the two coil groups are overlapped in vertical direction and arranged, high-frequency pulse current is passed through to the molybdenum filament straight line active section, from And alternating magnetic field is produced around molybdenum filament straight line active section, and then induced voltage is produced in described two coil groups, obtain simultaneously Induced voltage in more described two coil groups, and calculate according to comparative result the deviation side of molybdenum filament straight line active section perpendicularity To and deviation, then the perpendicularity of molybdenum filament straight line active section is adjusted to meet will according to the bias direction and deviation Ask.
- 2. a kind of nc wire-cutting molybdenum filament vertical survey means for correcting, it is characterised in that the device includes：Located at the upper set of coils (2) of molybdenum filament straight line active section (101) radial outside；Located at molybdenum filament straight line active section (101) radial outside and arranged for interval it is offline below the upper set of coils (2) Circle group (3), the lower coil group (3) is identical with the structure of the upper set of coils (2), and the two in the vertical direction overlaps arrangement；High-frequency pulse current is passed through to the molybdenum filament straight line active section (101), so as to produce alternating magnetic field around it and then make The high frequency electric source (4) of induced voltage is produced in the upper set of coils (2) and lower coil group (3)；AndWith the upper set of coils (2) and lower coil group (3) be connected and can obtain and the upper set of coils (2) and under The signal processing circuit (5) of induced voltage in coil group (3).
- 3. nc wire-cutting molybdenum filament vertical survey means for correcting according to claim 2, it is characterised in that：The signal Process circuit (5) include be connected with the upper set of coils (2) and lower coil group (3) differential amplifier circuit, with it is described differential The connected filter circuit of amplifying circuit and the A/D change-over circuits being connected with the filter circuit.
- 4. the nc wire-cutting molybdenum filament vertical survey means for correcting according to Claims 2 or 3, it is characterised in that：It is described Nc wire-cutting includes digital control system (6), is connected with the digital control system stepper motor (7), it is connected with the stepper motor Taper adjusting device (8), the signal processing circuit (5) are connected with the digital control system (6), the signal processing circuit (5) The magnitude difference signal of induced voltage is transmitted to described in the upper set of coils (2) and the lower coil group (3) that are obtained Digital control system (6), the digital control system (6) go out the molybdenum filament straight line active section (101) according to the magnitude difference signal of change Perpendicularity deviation value, and control the stepper motor (7) to drive the taper adjusting device (8) dynamic according to the perpendicularity deviation value Make, to adjust the perpendicularity of the molybdenum filament straight line active section (101).
- 5. the nc wire-cutting molybdenum filament vertical survey means for correcting according to Claims 2 or 3, it is characterised in that：It is described Upper set of coils (2) is made up of the X of circular arc to the Y-direction coil (202) of coil (201) and circular arc, and the X is to coil (201) and Y-direction coil (202) is split-type structural, and the two vertical distribution one on the other；The lower coil group (3) is made up of the X of circular arc to lower coil (301) and Y-direction lower coil (302), and the X is to lower coil (301) and Y-direction lower coil (302) is split-type structural, and the two vertical distribution one on the other；The X is to coil (201), Y-direction coil (202), X to lower coil (301) and Y-direction lower coil (302) around cloth Put the radial outside in the molybdenum filament straight line active section (101).
- 6. nc wire-cutting molybdenum filament vertical survey means for correcting according to claim 5, it is characterised in that：Also include cloth Put the measurement pedestal (9) on the nc wire-cutting, be fixed on the measurement pedestal (9) and be spaced apart one on the other Upper substrate (10) and infrabasal plate (11), the X for being removably mounted on the upper substrate (10) upper and lower surface respectively are upward Magnetic core (12b) on magnetic core (12a) and Y-direction, be removably mounted on respectively the X of the infrabasal plate (11) upper and lower surface to Magnetic core (13b) under lower magnetic core (13a) and Y-direction, magnetic core (12b), the downward magnetic cores of X (13a) on the upward magnetic cores of X (12a), Y-direction It is arc-shaped structure with magnetic core under Y-direction (13b), the X is respectively wound around institute to coil (201) and Y-direction coil (202) State in the upward magnetic cores of X (12a) and Y-direction on magnetic core (12b), the X is wound respectively to lower coil (301) and Y-direction lower coil (302) Under the downward magnetic cores of the X (13a) and Y-direction on magnetic core (13b).
- 7. nc wire-cutting molybdenum filament vertical survey means for correcting according to claim 6, it is characterised in that：The measurement Pedestal (9), upper substrate (10) and infrabasal plate (11) are marble material.
- 8. nc wire-cutting molybdenum filament vertical survey means for correcting according to claim 6, it is characterised in that：The upper base Respectively it is provided with an arc notch on plate (10) and infrabasal plate (11), magnetic core (12b) on the upward magnetic cores of X (12a) and Y-direction It is separately mounted on the upside of the inwall of the arc notch of the upper substrate (10) and on the downside of inwall, the downward magnetic cores of X (13a) It is separately mounted to magnetic core under Y-direction (13b) on the upside of the inwall of the arc notch of the infrabasal plate (11) and on the downside of inwall.
- 9. nc wire-cutting molybdenum filament vertical survey means for correcting according to claim 6, it is characterised in that：The measurement It is fixedly installed on pedestal (9) and touches side to zero piece (14).
- 10. nc wire-cutting molybdenum filament vertical survey means for correcting according to claim 6, it is characterised in that：The height Frequency power (4) be the nc wire-cutting cutting power supply, in addition to grounding resistance (17), selecting switch (18), with the molybdenum The connected upper conducting block (15) in silk straight line active section (101) upper end, under being connected with molybdenum filament straight line active section (101) lower end Conducting block (16), the upper conducting block (15) are connected with the high frequency electric source (4) by wire, the lower conducting block (16) by Action with the selecting switch (18) and be optionally connected with the grounding resistance (17) or the high frequency electric source (4).
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| CN201610592301.7A CN106112153B (en) | 2016-07-26 | 2016-07-26 | Nc wire-cutting molybdenum filament vertical survey bearing calibration and device |
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| CN201610592301.7A CN106112153B (en) | 2016-07-26 | 2016-07-26 | Nc wire-cutting molybdenum filament vertical survey bearing calibration and device |
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| CN107116277A (en) * | 2017-05-24 | 2017-09-01 | 何家庆 | A kind of wire cutting machine tool molybdenum filament automatic correction device |
| CN110091019B (en) * | 2018-01-31 | 2021-01-19 | 衡阳市裕展精密科技有限公司 | Angle correction method of linear cutting machine and correction block for angle correction |
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