CN106216786A - Nc wire-cutting molybdenum filament on-line measurement apparatus and method - Google Patents
Nc wire-cutting molybdenum filament on-line measurement apparatus and method Download PDFInfo
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- CN106216786A CN106216786A CN201610594461.5A CN201610594461A CN106216786A CN 106216786 A CN106216786 A CN 106216786A CN 201610594461 A CN201610594461 A CN 201610594461A CN 106216786 A CN106216786 A CN 106216786A
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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
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Abstract
The open a kind of nc wire-cutting molybdenum filament on-line measurement apparatus and method of the present invention, described device includes high frequency cutting power supply；Upper set of coils, this upper set of coils is arranged in the radial outside of described molybdenum filament straight line active section, and between described cut workpiece and described molybdenum filament straight line active section upper end；Lower coil group, this lower coil group is arranged in the radial outside of described molybdenum filament straight line active section, and between described cut workpiece and described molybdenum filament straight line active section bottom；Signal processing circuit, this signal processing circuit is all connected with described upper set of coils and lower coil group, and can obtain and compare the induced voltage produced in described upper set of coils and lower coil group.This device can the change of on-line measurement processing sections molybdenum filament position, and obtain the important informations such as molybdenum filament shake and gradient through analyzing and processing.
Description
Technical field
The present invention relates to wire cutting machine tool field, be specifically related to a kind of nc wire-cutting molybdenum filament on-line measurement device and side
Method.
Background technology
Linear cutter is that the fine wire utilizing continuous moving makees electrode, and workpiece carries out pulse spark electric discharge removal gold
Belonging to or excision forming, this equipment is mainly used in processing superhard steel, hard alloy, variously-shaped complexity and accurate tiny work
Part.Wire electrode is that (hereinafter referred to as molybdenum filament, this patent is mainly used in hurrying up a kind of fine wire being fabricated by by noble metals such as molybdenums
Silk cutting machine tool), molybdenum filament is discharged with workpiece by medium (working solution), and corrosion metal reaches the purpose of excision forming.
In recent years, along with the development of automatic technology, various digital control wire-electrode cutting equipment in electric machining industry by
Gradually popularizing, the technology such as its mechanical precision, position-force control, high frequency electric source has all reached higher level, but, put as processing
The molybdenum filament of electricity electrode, not only diameter little, along axial-movement, and be in the spray regime of working solution, it measures bad environments,
On-line checking difficulty is big, and technology also relatively lags behind, and molybdenum filament on-line checking always hinders the gentle shadow of linear cutting equipment Automated water
Ring the one of the main reasons of machining accuracy.Existing wire cutting machine tool, does not has processing sections molybdenum filament on-line checking function so that lathe warp
Below Chang Yinwei reason causes fracture of wire to produce serious consequence:
1, due to middle wire cutting machine (following wire cutting machine tool is middle wire cutting machine), molybdenum filament in processing
Doing high-speed motion, each parts in wire feeder are constantly changing the molybdenum filament direction of motion again, inevitably make molybdenum filament produce
Radial vibration or shake (the most referred to as shake), once jitter amplitude exceedes wire electrode elastic limit, will result in fracture of wire.
2, molybdenum filament is after processing a period of time, fluffs due to the stretching of self.When elongation is bigger, molybdenum filament can be aggravated
Shake, causes wire unstable and causes fracture of wire.
3, line cutting molybdenum wire is installed the most loose, then molybdenum filament shake severity, not only can directly affect workpiece surface roughness, seriously
Time can cause fracture of wire.
4, the place that lathe gear silk parts contact with molybdenum filament with guide wheel etc., uses time length all can produce abrasion, once
Guide wire apparatus deterioration in accuracy, can increase the shake of wire electrode, destroys the normal clearance of spark discharge, causes big current convergence to put
Electricity, so that the probability of fracture of wire increases.
5, in setting for machine operates, owing to molybdenum filament not carried out protection detection, maloperation or abnormal feelings once occur
Condition molybdenum filament is easy to be pulled by travelling workpiece break.
Once there is fracture of wire in wire cutting machine tool, not only to consume substantial amounts of wire electrode, increases production cost, but also can be tight
Ghost image rings line cutting production efficiency and reduces the serious consequence that workpiece surface quality, even workpiece are scrapped.
Existing wire cutting machine tool, the molybdenum filament detection method adding man-hour has two kinds:
1, filament failure is reported to the police, i.e. molybdenum filament once there occurs fracture of wire, fracture of wire switch Guan Bi, sends stubble warning device prompting letter
Breath；
2, mechanical tension detection device, is arranged on the horizontal wire part of wire feeder, opens for on-line checking molybdenum filament
Power.
Above two method, the first after there is fracture of wire, just sends failure alarm signal, cannot accomplish online pre-at all
Survey fracture of wire function；The second detection method, owing to using mechanical tension detection, volume is big, cannot be arranged on molybdenum filament at all and add
Workshop section, can be only installed on horizontal arm, indirectly measures molybdenum filament ruuning situation, due to processing sections molybdenum filament in the middle of be separated with multiple other
Wire parts, this method on the one hand certainty of measurement is poor, and on the other hand response speed is slow.
The problems referred to above are not effectively improved the most always.Therefore, the backward face of molybdenum filament online measuring technique is changed
Looks, make that detection technique is more scientific, wisdom, automatization and precision have important meaning to numerical control line cutting technology progress
Justice.
Summary of the invention
The present invention seeks to: for the problems referred to above, the present invention provides a kind of nc wire-cutting molybdenum filament on-line measurement device
And method, this device can the change of on-line measurement processing sections molybdenum filament position, obtain the important informations such as molybdenum filament shake and gradient.
The technical scheme is that
A kind of nc wire-cutting molybdenum filament on-line measurement device, including high frequency cutting power supply, this high frequency cutting power supply is to number
The two ends up and down of the molybdenum filament straight line active section of control wire cutting machine are passed through the high-frequency pulse current flowing to cut workpiece, also include:
Upper set of coils, this upper set of coils is arranged in the radial outside of described molybdenum filament straight line active section, and is positioned at described being cut
Cut between workpiece and described molybdenum filament straight line active section upper end；
Lower coil group, this lower coil group is arranged in the radial outside of described molybdenum filament straight line active section, and is positioned at described being cut
Cut between workpiece and described molybdenum filament straight line active section bottom；
Signal processing circuit, this signal processing circuit is all connected with described upper set of coils and lower coil group, and can obtain
With the induced voltage produced in relatively described upper set of coils and lower coil group.
It is connected between described upper set of coils and lower coil group with described signal processing circuit and has differential amplifier circuit.
Described upper set of coils is made up of coil in the most spaced X upwards coil and Y-direction, and described X is to reaching the standard grade
Circle is made up of the left coil I of arc-shaped structure and the right coil I of arc-shaped structure, described left coil I and right coil I horizontal symmetry
It is arranged in the radial direction left and right sides of described molybdenum filament straight line active section；In described Y-direction, coil is by the front coil I of arc-shaped structure
(203) constitute with the rear coil I of arc-shaped structure, and described front coil I and rear coil I horizontal symmetry to be arranged in described molybdenum filament straight
Both sides forwards, backwards, the footpath of line active section；
Described lower coil group is made up of to lower coil and Y-direction lower coil the most spaced X, and described X is to rolling off the production line
Circle is made up of the left coil II of arc-shaped structure and the right coil II of arc-shaped structure, described left coil II and right coil II level
It is arranged symmetrically in the radial direction left and right sides of described molybdenum filament straight line active section；Described Y-direction lower coil is by the front coil of arc-shaped structure
II and the rear coil II of arc-shaped structure constitute, and described front coil II and rear coil II horizontal symmetry to be arranged in described molybdenum filament straight
Both sides forwards, backwards, the footpath of line active section；
Also include in annular the most spaced apart pedestal under pedestal and annular, detachable on pedestal in described annular
The upper magnetic core I of annular and the upper magnetic core II of annular are installed, described upper magnetic core I is positioned at the top of described upper magnetic core II,
And the two is coaxially arranged with pedestal in described annular；The lower magnetic core I of annular is removably installed on pedestal under described annular
With the lower magnetic core II of annular, described lower magnetic core I is positioned at the top of described lower magnetic core II, and the two is same with pedestal under described annular
Axle is arranged；
Described left coil I and right coil I are symmetrically wrapped on described upper magnetic core I, described front coil I and rear coil
It is wrapped in symmetrically on described upper magnetic core II before and after I；
Described left coil II and right coil II are symmetrically wrapped on described lower magnetic core I, described front coil II and after
It is wrapped in symmetrically on described lower magnetic core II before and after coil II.
In described annular, under pedestal and annular, pedestal is marble material.
Form the upper gear liquid cover covering on outside described upper set of coils in described annular on pedestal, become on pedestal under described annular
Type has the lower block liquid cover covered on outside described lower coil group.
The outer surface of described upper set of coils, lower coil group, upper magnetic core I, upper magnetic core II, lower magnetic core I and lower magnetic core II is all coated with
It is covered with one layer and is coated with damp proof insulation material.
Described upper set of coils is identical with the structure of lower coil group, and the two in the vertical direction overlaps and arranges.
Described signal processing circuit is connected with the digital control system of described nc wire-cutting.
A kind of nc wire-cutting molybdenum filament On-line Measuring Method, outside in the footpath of nc wire-cutting molybdenum filament straight line active section
Side is respectively provided with two coil groups, one of them coil groups be arranged in cut workpiece and molybdenum filament straight line active section upper end it
Between, another coil groups is arranged between cut workpiece and molybdenum filament straight line active section bottom, and high frequency cutting power supply is to molybdenum filament
The upper/lower terminal of straight line active section is passed through two bursts of equal-sized flow directions and is cut the high-frequency pulse current of workpiece, thus at molybdenum
Produce alternating magnetic field around silk straight line active section, and then in said two coil groups, produce induced voltage, obtain and compare institute
State induced voltage in two coil groups, draw shake and the gradient letter of molybdenum filament straight line active section according to induced voltage relatively result
Breath.
The invention have the advantage that
1, the high speed axis of molybdenum filament moves, parts each in wire feeder cooperating has participated in jointly, therefore,
Motion in wire feeder is more complicated, such as: due to wire storage cylinder and the circular runout of guide wheel and axial float, the axle of molybdenum filament
The deformation of line, abrasion radially, the abrasion of wire feeder loosen and add the effects such as Discharge Force in man-hour, all may affect the footpath of molybdenum filament
To stability, molybdenum filament shake can be grasped timely and accurately with oblique with the state of on-line checking molybdenum filament radial motion by this device
The data such as degree, note abnormalities and alarm can do respective handling, it is achieved that on-line prediction fracture of wire defencive function.
2, this device directly measures the radial stability of processing sections molybdenum filament, connects than the machinery being mounted remotely from processing sections molybdenum filament
The precision of touch strain measuring method is high, response speed is fast.
3, this device can carry out the jitter measurement of orthogonal both direction simultaneously, and can obtain molybdenum filament shake track in flat field
Information, this information is conducive to researching and analysing the reasonability of wire feeder, science further.
4, this device can realize gradient on-line checking, once finds that slope deviation is excessive, points out warning immediately.
5, by this device to when causing molybdenum filament shake to become big because of Discharge Force effect, high frequency electric source output work can automatically be reduced
Rate, thus be conducive to raising machining accuracy and minimizing to blow an occurrence probability.
6, this device uses non-cpntact measurement, on the one hand, avoid by the error caused by measurement apparatus contact molybdenum filament；Separately
On the one hand, processing sections molybdenum filament is often in moist adverse circumstances, and alternate manner sensor is difficult to accomplish on-line measurement.
7, when setting for machine operation or generation abnormal conditions, once molybdenum filament is pulled by workpiece and is easy to be pulled off, this dress
Putting and can detect that molybdenum filament gradient is excessive in time, stop table moves immediately, it is achieved that molybdenum filament pulls protection.
8, this device can carry out joint control with tension force and taper degree control device, when finding that molybdenum filament shake and gradient etc. can time abnormal
It is automatically adjusted, improves the intelligent level of equipment.
9, processing sections molybdenum filament is implemented radial position detection, such as: the parameters such as shake, gradient and tension force, for linear cutting equipment
Molybdenum filament status information promptly and accurately is provided.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings and embodiment the invention will be further described:
Fig. 1 is the overall structure schematic diagram of the embodiment of the present invention this nc wire-cutting molybdenum filament on-line measurement device；
Fig. 2 is the partial structurtes schematic diagram of the embodiment of the present invention this nc wire-cutting molybdenum filament on-line measurement device；
Wherein: A-is cut workpiece, 1-molybdenum filament, 101-molybdenum filament straight line active section, 2-upper set of coils, 201-left coil I,
The right coil of 202-I, coil I before 203-, 3-lower coil group, 301-left coil II, the right coil of 302-II, coil II before 303-, 4-
High frequency cutting power supply, 5-signal processing circuit, 501-differential amplifier circuit, pedestal in 8-annular, pedestal under 9-annular, on 10a-
Magnetic core I, the upper magnetic core of 10b-II, magnetic core I under 11a-, magnetic core II under 11b-, 12-wire slide carriage, 13-wire storage cylinder, the upper pair of 14-is led
Wheel, secondary guide wheel under 15-, 16-tensioner, 17-upper block, 18-lower tumbler, the upper conducting block of 19-, conducting block under 20-, on 21-
Filar guide, filar guide under 22-, 23-converter, 24-motor, 25-digital control system, 26-stepper motor driver, 27-tapering is adjusted
Regulating device.
Detailed description of the invention
Fig. 1 and Fig. 2 illustrates a specific embodiment of the present invention this nc wire-cutting molybdenum filament on-line measurement device,
It is known that the molybdenum filament 1 of nc wire-cutting includes the molybdenum filament straight line active section 101 for cutting workpiece, and the master of this device
Act on and be that this molybdenum filament straight line active section 101 radial position of on-line measurement changes, so analyzing and processing obtain molybdenum filament shake and
The important informations such as gradient.
At present the line cutting processing of nc wire-cutting be utilize mobile molybdenum filament as electrode " cutter ", with the quilt of metal
There is electric discharge corrosion in cutting workpiece A, it is to transfer realization by the wire storage cylinder in wire feeder is positive and negative that molybdenum filament reciprocates.Such as Fig. 1
Shown in, the wire feeder of nc wire-cutting includes: converter 23, motor 24, wire slide carriage 12, wire storage cylinder 13, upper secondary guide wheel
14, lower secondary guide wheel 15, tensioner 16, upper block 17, lower tumbler 18, upper conducting block 19, lower conducting block 20, upper filar guide 21 and
Lower filar guide 22.During cutting processing, molybdenum filament electrode moves along its axis direction with certain speed, and it constantly enters and leaves joint-cutting
Interior region of discharge.
Owing to wire storage cylinder drives molybdenum filament to move doing high speed axis, each parts in wire feeder are constantly changing molybdenum filament again
The direction of motion, simultaneously because wire storage cylinder and the circular runout of guide wheel and axial float, the axis deformation of molybdenum filament, mill radially
Damage, the abrasion of wire feeder loosens and adds Discharge Force effect in man-hour etc., and above-mentioned situation all inevitably leads to molybdenum filament and produces footpath
To shake, it is easy to produce the problem such as secondary discharge or short circuit, to such an extent as to affect working (machining) efficiency and product quality, the most once tremble
Dynamic amplitude exceedes wire electrode elastic limit, will result in the serious consequence of fracture of wire.Therefore, processing sections molybdenum filament on-line checking is always
The key technical problem that NC Electrical Manufacture Tool is urgently to be resolved hurrily.And this nc wire-cutting molybdenum filament shown in Fig. 1 and Fig. 2 is online
Measurement apparatus is developed for solving this technical problem just.
The present embodiment this nc wire-cutting molybdenum filament on-line measurement device specifically includes that high frequency cutting power supply 4, upper coil
Group 2, lower coil group 3 and signal processing circuit 5.Wherein: high frequency cutting power supply 4 has parts by oneself for existing nc wire-cutting, its
For being passed through the high-frequency pulse current flowing to cut workpiece A to the two ends up and down of described molybdenum filament straight line active section 101, thus with
There is electric discharge corrosion in cut workpiece A, to cut workpiece.Upper set of coils 2 is arranged in the radial direction of described molybdenum filament straight line active section 101
Outside, and between described cut workpiece A and described molybdenum filament straight line active section 101 upper end, it is specifically located at seal wire
The lower section of device 21.According to galvanomagnetic-effect, in cutting process, in molybdenum filament straight line active section 101, stream has a high-frequency pulse current, thus
Produce alternating magnetic field about, and then in this upper set of coils 2, produce induced voltage.It is straight that lower coil group 3 is arranged in described molybdenum filament
The radial outside of line active section 101, and between described cut workpiece A and described molybdenum filament straight line active section 101 bottom,
It is specifically located at the top of lower filar guide 22.According to galvanomagnetic-effect, in cutting process, in molybdenum filament straight line active section 101, stream has height
Frequently pulse current, thus producing alternating magnetic field about, and then also produce induced voltage in this lower coil group 2.At signal
Reason circuit 5 is all connected with described upper set of coils 2 and lower coil group 3, and can obtain and compare described upper set of coils 2 and roll off the production line
Induced voltage in circle group 3.This described upper set of coils 2 is identical with the structure of lower coil group 3, and the two uses microstructure design system
Make, it can be ensured that the concordance of the two structure, and upper set of coils 2 and lower coil group 3 are at vertical direction (Z-direction) coincidence cloth
Putting, i.e. upper set of coils 2 and lower coil group 3 are in X, Y-direction position consistency.
The operation principle of this device is as follows:
Molybdenum filament electrode (also known as line electrode) basis is dither current as flow through in wire, and line electrode always, this
Time around molybdenum filament straight line active section 101, create alternating magnetic field, in the size of this magnetic field intensity and molybdenum filament straight line active section 101
Electric current I relevant with conductor length r, i.e.
B=f (I, r) (1)
In cutting on line processing, in order to improve the electric current that passes through in molybdenum filament straight line active section 101, (high frequency electric source is from belt current
Measuring circuit, i.e. electric current are known), to cut workpiece electrical discharge indeed through upper and lower section of molybdenum filament (with molybdenum filament and cut work
Part contact point is separation, and molybdenum filament straight line active section 101 is divided into two sections) (upper and lower two conducting blocks of parallel operation
Jointly powering to cut workpiece, as shown in Figure 1), the molybdenum filament at upper set of coils 2 and the molybdenum filament at lower coil group 3 are equivalent to two
Root parallel conducting wire, i.e. upper-lower section molybdenum filament size of current are identical, therefore molybdenum filament at molybdenum filament and lower coil group 3 at upper set of coils 2
In the size of current passed through be the same, by the process to two paths of data, thus cancellation current and other disturbances are to faradism
The impact of pressure, so in induced voltage and lower coil group 3, the ratio of induced voltage and difference be only and molybdenum filament straight line in upper set of coils 2
Being correlated with in the position of active section 101, once in cutting processing, occurs causing molybdenum filament upper and lower radial displacement deviation, all because of a variety of causes
Can show with the size form of induced voltage in coil.Induced voltage in induced voltage and lower coil group 3 in upper set of coils 2
Ratio and difference be need critical datas to be processed, be utilized respectively this ratio and difference data can eliminate various disturbance to survey
The impact of amount, and utilize above two data more accurate to the comprehensive descision of measurement result.If, molybdenum filament straight line active section
101 do not shake, then the repeatedly ratio obtained by signal processing circuit 5 keeps consistent with difference relative measurements；When
Owing to a variety of causes molybdenum filament straight line active section 101 produces shake, then it is positioned at reaching the standard grade of molybdenum filament straight line active section 101 first half office
In circle group 2 induced voltage and be positioned in the lower coil group 3 of office, molybdenum filament straight line active section 101 lower half the ratio of induced voltage and
Difference repetitive measurement result is inconsistent, and this change can be accurately detected by signal processing circuit 5, when detected value exceedes
Set threshold values then to carry out reporting to the police and respective handling.
In order to improve the certainty of measurement to molybdenum filament straight line active section jitter conditions, simultaneously facilitate and calculate the work of molybdenum filament straight line
The gradient of section, described upper set of coils 2 and coil 3 are arranged to following version by the present embodiment:
Upper set of coils 2 is made up of coil in the most spaced X upwards coil and Y-direction, described X upwards coil by
The left coil I 201 of arc-shaped structure and the right coil I 202 of arc-shaped structure are constituted, described left coil I 201 and right coil I 202
Horizontal symmetry is arranged in the radial direction left and right sides of described molybdenum filament straight line active section 101.In Y-direction, coil is by the front of arc-shaped structure
Enclose I 203 and rear coil I (not shown) of arc-shaped structure constitute, and described front coil I 203 and rear coil I horizontal symmetry
It is arranged in the both sides forwards, backwards, footpath of described molybdenum filament straight line active section 101.
Lower coil group 3 is made up of to lower coil and Y-direction lower coil the most spaced X, described X to lower coil by
The left coil II 301 of arc-shaped structure and the right coil II 302 of arc-shaped structure are constituted, described left coil II 301 and right coil
II 302 horizontal symmetry are arranged in the radial direction left and right sides of described molybdenum filament straight line active section 101；Described Y-direction lower coil is by circular arc
Rear coil II (not shown) of the front coil II 303 of structure and arc-shaped structure is constituted, and described front coil II 303 and after
Coil II horizontal symmetry is arranged in the both sides forwards, backwards, footpath of described molybdenum filament straight line active section 101；
During work, X upwards coil is corresponding for measuring molybdenum filament straight line active section 101 in X-direction to lower coil with X
Gradient, in Y-direction, coil is corresponding with Y-direction lower coil for measuring molybdenum filament straight line active section 101 gradient in the Y direction.
This device also includes in annular the most spaced apart pedestal 9, pedestal in described annular under pedestal 8 and annular
Upper magnetic core I 10a of annular and upper magnetic core II 10b of annular, described upper magnetic core I 10a are removably installed on 8 and are positioned at institute
State the top of magnetic core II 10b, and the two is coaxially arranged with pedestal 8 in described annular；Under described annular on pedestal 9 removably
Lower magnetic core I 11a of annular and lower magnetic core II 11b of annular, described lower magnetic core I 11a are installed and are positioned at described lower magnetic core II
The top of 11b, and the two is coaxially arranged with pedestal 9 under described annular.
Described left coil I 201 and right coil I 202 are symmetrically wrapped on described upper magnetic core I 10a, described front coil
I 203 and rear coil I before and after be wrapped in symmetrically on described upper magnetic core II 10b.
Described left coil II 301 and right coil II 302 are symmetrically wrapped on described lower magnetic core I 11a, described front
Enclose II 303 and rear coil II before and after be wrapped in symmetrically on described lower magnetic core II 11b.
And under pedestal 8 and annular, the radially opposite sides of pedestal 9 are provided with installation arm in described annular, install arm for
Pedestal 9 under pedestal in annular 8 and annular is fixed on corresponding fixing body, it is ensured that upper set of coils 2 and the position of lower coil group 3
Put stability.
The coil of upper set of coils 2 and lower coil group 3 is all used paired circular arc symmetrical structure by the present embodiment, not only may be used
To utilize differential motion amplifying unit suppression effective to common-mode signal, but also position differential signal can be amplified, be improve
The precision of overall measuring circuit.
Described signal processing circuit 5 includes the differential amplifier circuit 501 being connected with described upper set of coils 2 and lower coil group 3.
During actual measurement, left coil I 201 and difference P1 of induced voltage, front coil I 203 and rear line in right coil I 202
Difference P3 of induced voltage, front coil II 303 in difference P2 of induced voltage, left coil II 301 and right coil II 302 in circle I
With difference P4 of induced voltage in rear coil II, after being changed by the signal filtering of signal processing circuit 5, conditioning and A/D, calculate
The ratio of P1 and P3 and radial position difference (electric current it is known that position difference hereinafter referred to as difference), the ratio of P2 and P4 and radially
Position difference, wherein ratio and the difference synthesis of P1 and P3 reflects the molybdenum filament straight line active section 101 gradient in X-direction, P2 and P4
Ratio and difference synthesis reflection molybdenum filament straight line active section 101 gradient in the Y direction.If molybdenum filament straight line active section 101 does not has
Shake, then P1 with P3 ratio keeps consistent with the repetitive measurement result of difference, P2 with P4 ratio and difference；When due to various
Reason molybdenum filament straight line active section 101 produces shake, then the repetitive measurement knot of P1 and P3 ratio and difference, P2 and P4 ratio and difference
The most inconsistent, then carry out reporting to the police and respective handling when detected value exceedes setting threshold values.
And, under the upper pedestal 8 of annular described in the present embodiment and annular pedestal 9 magnetic insulation all absolutely for marble material,
And described upper set of coils 2 is arranged in the radial outside of pedestal 8 central through hole in annular, described lower coil group 3 is arranged in ring
The radial outside of pedestal 9 central through hole under shape, to prevent from colliding upper set of coils and lower coil group in molybdenum filament processing.
Additionally, form the upper gear liquid cover covering on outside described upper set of coils 2 in described annular on pedestal 8, under described annular
The lower block liquid cover covered on outside described lower coil group 3 is formed on pedestal 9.Described upper gear liquid cover and lower block liquid cover are used for preventing cutting
During working solution be splashed in upper set of coils 2 and lower coil group 3.For protection against the tide, the present embodiment in described upper set of coils 2, roll off the production line
The outer surface of circle group 3, upper magnetic core I 10a, upper magnetic core II 10b, lower magnetic core I 11a and lower magnetic core II 11b is coated with one layer and is coated with anti-
Tide insulant.
It addition, described signal processing circuit 5 is connected by the present embodiment with the digital control system 25 of wire cutting machine tool self, actual
During application, signal processing circuit 5 can be with accurately measure molybdenum filament straight line active section upper and lower end in X, the radial position of Y-direction
Deviation, is then completed molybdenum filament shake and gradient calculating through digital control system, thus can be completed by tension mechanism within the specific limits
Jitter suppression, or control the gradient adjustment that motor completes to work molybdenum filament straight line.
Certainly, above-described embodiment only for technology design and the feature of the present invention are described, its object is to make people's energy much of that
Solve present disclosure and implement according to this, can not limit the scope of the invention with this.All according to major technique of the present invention
Equivalent transformation that the spirit of scheme is done or modification, all should contain within protection scope of the present invention.
Claims (10)
1. a nc wire-cutting molybdenum filament on-line measurement device, including high frequency cutting power supply (4), this high frequency cutting power supply (4)
The high-frequency impulse flowing to cut workpiece (A) it is passed through to the two ends up and down of molybdenum filament straight line active section (101) of nc wire-cutting
Electric current, it is characterised in that this device also includes:
Upper set of coils (2), this upper set of coils (2) is arranged in the radial outside of described molybdenum filament straight line active section (101), and is positioned at institute
State between cut workpiece (A) and described molybdenum filament straight line active section (101) upper end；
Lower coil group (3), this lower coil group (3) is arranged in the radial outside of described molybdenum filament straight line active section (101), and is positioned at institute
State between cut workpiece (A) and described molybdenum filament straight line active section (101) bottom, this lower coil group (3) and described upper coil
The structure of group (2) is identical, and the two in the vertical direction overlaps and arranges；
Signal processing circuit (5), this signal processing circuit (5) is all connected with described upper set of coils (2) and lower coil group (3), and
Can obtain and compare the induced voltage produced in described upper set of coils (2) and lower coil group (3).
Nc wire-cutting molybdenum filament on-line measurement device the most according to claim 1, it is characterised in that: described signal processing
Circuit (5) includes the differential amplifier circuit (501) being connected with described upper set of coils (2) and lower coil group (3).
Nc wire-cutting molybdenum filament on-line measurement device the most according to claim 1 and 2, it is characterised in that reach the standard grade described in:
Circle group (2) is made up of coil in the most spaced X upwards coil and Y-direction, and described X upwards coil is by arc-shaped structure
Left coil I (201) and arc-shaped structure right coil I (202) constitute, described left coil I (201) and right coil I (202) water
The flat radial direction left and right sides being arranged symmetrically in described molybdenum filament straight line active section (101)；In described Y-direction, coil is by arc-shaped structure
The rear coil I of front coil I (203) and arc-shaped structure is constituted, and described front coil I (203) and rear coil I horizontal symmetry are arranged
Both sides forwards, backwards, footpath described molybdenum filament straight line active section (101)；
Described lower coil group (3) is made up of to lower coil and Y-direction lower coil the most spaced X, and described X is to lower coil
It is made up of the left coil II (301) of arc-shaped structure and the right coil II (302) of arc-shaped structure, described left coil II (301)
With the radial direction left and right sides that right coil II (302) horizontal symmetry is arranged in described molybdenum filament straight line active section (101)；Under described Y-direction
Coil is made up of the front coil II (303) of arc-shaped structure and the rear coil II of arc-shaped structure, and described front coil II (303)
With the both sides forwards, backwards, footpath that rear coil II horizontal symmetry is arranged in described molybdenum filament straight line active section (101).
Nc wire-cutting molybdenum filament on-line measurement device the most according to claim 3, it is characterised in that: also include on one one
Under pedestal (9) under pedestal (8) and annular in annular spaced apart, described annular is removably provided with circle on pedestal (8)
The upper magnetic core I (10a) of annular and the upper magnetic core II (10b) of annular, described upper magnetic core I (10a) is positioned at described upper magnetic core II
(10b) top, and the two is coaxially arranged with pedestal (8) in described annular；Removably install on pedestal (9) under described annular
The lower magnetic core I (11a) of annular and the lower magnetic core II (11b) of annular, described lower magnetic core I (11a) is had to be positioned at described lower magnetic core
The top of II (11b), and the two is coaxially arranged with pedestal (9) under described annular；
Described left coil I (201) and right coil I (202) are symmetrically wrapped on described upper magnetic core I (10a), described front
It is wrapped in symmetrically on described upper magnetic core II (10b) before and after circle I (203) and rear coil I；
Described left coil II (301) and right coil II (302) are symmetrically wrapped on described lower magnetic core I (11a), described before
It is wrapped in symmetrically on described lower magnetic core II (11b) before and after coil II (303) and rear coil II.
Nc wire-cutting molybdenum filament on-line measurement device the most according to claim 4, it is characterised in that: base in described annular
Under frame (8) and annular, pedestal (9) is marble material.
Nc wire-cutting molybdenum filament on-line measurement device the most according to claim 4, it is characterised in that: base in described annular
Form the upper gear liquid cover covering on described upper set of coils (2) outward on frame (8), form on pedestal (9) under described annular and cover on institute
State lower coil group (3) lower block liquid cover outward.
Nc wire-cutting molybdenum filament on-line measurement device the most according to claim 4, it is characterised in that: described upper set of coils
(2), lower coil group (3), upper magnetic core I (10a), upper magnetic core II (10b), lower magnetic core I (11a) and the appearance of lower magnetic core II (11b)
Face is coated with one layer and is coated with damp proof insulation material.
Nc wire-cutting molybdenum filament on-line measurement device the most according to claim 1 and 2, it is characterised in that reach the standard grade described in:
Circle group (2) is identical with the structure of lower coil group (3), and the two in the vertical direction overlaps and arranges.
Nc wire-cutting molybdenum filament on-line measurement device the most according to claim 1 and 2, it is characterised in that: described signal
Process circuit (5) to be connected with the digital control system (25) of described nc wire-cutting.
10. a nc wire-cutting molybdenum filament On-line Measuring Method, it is characterised in that: work at nc wire-cutting molybdenum filament straight line
The radial outside of section is respectively provided with two consistent and overlap layout at vertical direction coil groups of structure, one of them coil
Group is arranged between cut workpiece and molybdenum filament straight line active section upper end, and another coil groups is arranged in cut workpiece and molybdenum
Between silk straight line active section bottom, high frequency cutting power supply is passed through two bursts of size phases to the upper/lower terminal of molybdenum filament straight line active section
Deng the high-frequency pulse current flowing to cut workpiece, thus around molybdenum filament straight line active section, produce alternating magnetic field, Jin Er
Said two coil groups produces induced voltage, obtains and compare induced voltage in said two coil groups, according to induced voltage
Comparative result draws shake and the slope information of molybdenum filament straight line active section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610594461.5A CN106216786B (en) | 2016-07-26 | 2016-07-26 | Nc wire-cutting molybdenum filament on-line measurement apparatus and method |
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| CN201610594461.5A CN106216786B (en) | 2016-07-26 | 2016-07-26 | Nc wire-cutting molybdenum filament on-line measurement apparatus and method |
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| CN106216786B CN106216786B (en) | 2018-05-22 |
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| CN108237276A (en) * | 2018-03-19 | 2018-07-03 | 苏州科技大学 | A kind of device and method of automatic inhibition molybdenum filament form and position |
| CN112743007A (en) * | 2020-12-22 | 2021-05-04 | 湖南戈人自动化科技有限公司 | Wire cutting feed control feedback device |
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| CN108237276A (en) * | 2018-03-19 | 2018-07-03 | 苏州科技大学 | A kind of device and method of automatic inhibition molybdenum filament form and position |
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| Publication number | Publication date |
|---|---|
| CN106216786B (en) | 2018-05-22 |
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