CN106216786B - 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
- Publication number
- CN106216786B CN106216786B CN201610594461.5A CN201610594461A CN106216786B CN 106216786 B CN106216786 B CN 106216786B CN 201610594461 A CN201610594461 A CN 201610594461A CN 106216786 B CN106216786 B CN 106216786B
- Authority
- CN
- China
- Prior art keywords
- coil
- molybdenum filament
- wire
- straight line
- active section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
-
- 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
-
- 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 present invention discloses a kind of nc wire-cutting molybdenum filament on-line measurement apparatus and method, and described device includes high frequency cutting power supply；Upper set of coils, the upper set of coils are arranged in the radial outside of the molybdenum filament straight line active section, and between the cut workpiece and the molybdenum filament straight line active section upper end；Lower coil group, the lower coil group are arranged in the radial outside of the molybdenum filament straight line active section, and between the cut workpiece and the molybdenum filament straight line active section lower end；Signal processing circuit, the signal processing circuit are 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 the induced voltage that generates.The device is capable of the variation of on-line measurement processing sections molybdenum filament position, and obtains 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 fields, and in particular to a kind of nc wire-cutting molybdenum filament on-line measurement device and side
Method.
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
Belong to or excision forming, the equipment are mainly used for processing superhard steel, hard alloy, the work that variously-shaped complicated and precision is tiny
Part.Wire electrode is that (hereinafter referred to as molybdenum filament, this patent are mainly used for 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 (working solution) with workpiece, and corrosion metal achievees the purpose that excision forming.
In recent years, with the continuous development of automatic technology, various digital control wire-electrode cutting equipment in electric machining industry by
It gradually popularizes, the technologies such as mechanical precision, position-force control, high frequency electric source have all reached higher level, still, are put as processing
The molybdenum filament of electrode, not only diameter it is small, along axial-movement, but also in working solution spray regime in, measuring environment is severe,
On-line checking difficulty is big, and technology also relatively lags behind, and molybdenum filament on-line checking is always to hinder the gentle shadow of linear cutting equipment Automated water
One of the main reason for ringing machining accuracy.Existing wire cutting machine tool, without processing sections molybdenum filament on-line checking function so that lathe passes through
Below Chang Yinwei reasons cause fracture of wire and generate serious consequence：
1st, 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 component in wire feeder is constantly changing the molybdenum filament direction of motion again, inevitably generates molybdenum filament
Radial vibration or shake (referred to as shaking below), once jitter amplitude is more than wire electrode elastic limit, will result in fracture of wire.
2nd, molybdenum filament is fluffed after a period of time is processed due to the stretching of itself.When elongation is larger, molybdenum filament can be aggravated
Shake causes wire unstable and causes fracture of wire.
3rd, the installation of wire cutting molybdenum filament is too loose, then molybdenum filament shake is severe, can not only directly affect workpiece surface roughness, seriously
When can cause fracture of wire.
4th, the place that lathe gear silk component and guide wheel etc. are contacted with molybdenum filament, usage time, which has been grown, can all generate abrasion, once
Guide wire apparatus deterioration in accuracy can increase the shake of wire electrode, destroy the normal clearance of spark discharge, and high current concentration is caused to put
Electricity, so that the probability of fracture of wire increases.
5th, in setting for machine operation, due to not carrying out protection detection to molybdenum filament, once there are maloperation or abnormal feelings
Condition molybdenum filament is easy to be broken by travelling workpiece dragging.
Fracture of wire once occurs for wire cutting machine tool, not only to consume substantial amounts of wire electrode, increases production cost, but also can be tight
Ghost image rings wire cutting production efficiency and reduces the serious consequence that workpiece surface quality or even workpiece are scrapped.
Existing wire cutting machine tool, there are two types of molybdenum filament detection methods during processing：
1st, filament failure is alarmed, i.e., fracture of wire once has occurred in molybdenum filament, and fracture of wire switch is closed, and sends stubble warning device prompting letter
Breath；
2nd, mechanical tension detection device, mounted on the horizontal wire part of wire feeder, for on-line checking molybdenum filament
Power.
Above two method, the first just sends failure alarm signal after fracture of wire occurs, and can not accomplish at all online pre-
Survey fracture of wire function；Second of detection method, due to being detected using mechanical tension, volume is big, can not add at all mounted on molybdenum filament
Workshop section can be only installed on horizontal arm, indirectly measure molybdenum filament operating condition, due to be separated among processing sections molybdenum filament it is a number of other
Wire component, this method one side measurement accuracy is poor, and another aspect reaction speed is slow.
The above problem is not effectively improved always for many years.Therefore, the backwardness face of molybdenum filament online measuring technique is changed
Looks make more scientific detection technique, wisdom, automation and precision have important meaning to the progress of numerical control line cutting technology
Justice.
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 on-line measurement device
And method, the device are capable of the variation 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, the high frequency cutting power supply is to number
The upper and lower ends for controlling the molybdenum filament straight line active section of wire cutting machine are passed through the high-frequency pulse current that flow direction is cut workpiece, further include：
Upper set of coils, which is arranged in the radial outside of the molybdenum filament straight line active section, and is cut positioned at described
It cuts between workpiece and the molybdenum filament straight line active section upper end；
Lower coil group, which is arranged in the radial outside of the molybdenum filament straight line active section, and is cut positioned at described
It cuts between workpiece and the molybdenum filament straight line active section lower end；
Signal processing circuit, the signal processing circuit are connected with the upper set of coils and lower coil group, and can obtain
The induced voltage generated in the upper set of coils and lower coil group.
Differential amplifier circuit is connected between the upper set of coils and lower coil group and the signal processing circuit.
The upper set of coils is made of X spaced one on the other to coil and Y-direction coil, and the X is to reaching the standard grade
Circle is made of the left coil I of arc-shaped structure and the right coil I of arc-shaped structure, I horizontal symmetrical of the left coil I and right coil
It is arranged at left and right sides of the radial direction of the molybdenum filament straight line active section；The Y-direction coil by arc-shaped structure preceding coil I
(203) formed with the rear coil I of arc-shaped structure, and to be arranged in the molybdenum filament straight for the preceding coil I and I horizontal symmetrical of rear coil
The radial direction front and rear sides of line active section；
The lower coil group is made of X spaced one on the other to lower coil and Y-direction lower coil, and the X is to offline
Circle is made of the left coil II of arc-shaped structure and the right coil II of arc-shaped structure, and the left coil II and right coil II are horizontal
It is arranged symmetrically at left and right sides of the radial direction of the molybdenum filament straight line active section；The Y-direction lower coil by arc-shaped structure preceding coil
II and the rear coil II of arc-shaped structure form, and to be arranged in the molybdenum filament straight for the preceding coil II and II horizontal symmetrical of rear coil
The radial direction front and rear sides of line active section；
Further include in the annular being spaced apart one on the other pedestal and the lower pedestal of annular, it is detachable on the upper pedestal of annular
Ground is equipped with the upper magnetic core I of circular ring shape and the upper magnetic core II of circular ring shape, and the upper magnetic core I is located at the top of the upper magnetic core II,
And the two and the upper pedestal of the annular are coaxially arranged；The lower magnetic core I of circular ring shape is removably installed on the lower pedestal of the annular
With the lower magnetic core II of circular ring shape, the lower magnetic core I is located at the top of the lower magnetic core II, and the two and the lower pedestal of the annular are same
Axis is arranged；
The left coil I and right coil I are symmetrically wrapped on the upper magnetic core I, the preceding coil I and rear coil
It is symmetrically wrapped in before and after I on the upper magnetic core II；
The left coil II and right coil II are symmetrically wrapped on the lower magnetic core I, and the preceding coil II is with after
It is symmetrically wrapped in before and after coil II on the lower magnetic core II.
The upper pedestal of annular and annular lower pedestal are marble material.
Form the upper gear liquid cover covered on outside the upper set of coils on the upper pedestal of annular, on the lower pedestal of annular into
Type has the lower block liquid cover covered on outside the lower coil group.
The upper set of coils, lower coil group, upper magnetic core I, upper magnetic core II, the outer surface of lower magnetic core I and lower magnetic core II apply
It is covered with one layer of painting damp proof insulation material.
The upper set of coils is identical with the structure of lower coil group, and the two overlaps arrangement in the vertical direction.
The signal processing circuit is connected with the digital control system of the nc wire-cutting.
A kind of nc wire-cutting molybdenum filament On-line Measuring Method, it is outside in the footpath of nc wire-cutting molybdenum filament straight line active section
Side sets two coil groups respectively, one of coil group be arranged in cut workpiece and molybdenum filament straight line active section upper end it
Between, another coil group is arranged between cut workpiece and molybdenum filament straight line active section lower end, and high frequency cutting power supply is to molybdenum filament
The upper/lower terminal of straight line active section is passed through the high-frequency pulse current that two bursts of equal-sized flow directions are cut workpiece, so as in molybdenum
Alternating magnetic field is generated around silk straight line active section, and then generates induced voltage in described two coil groups, obtain and compares institute
Induced voltage in two coil groups is stated, show that the shake of molybdenum filament straight line active section and gradient are believed according to induced voltage relatively result
Breath.
It is an advantage of the invention that：
1st, the high speed axis movement of molybdenum filament is to be cooperated to participate in completing jointly by each component in wire feeder, therefore,
Movement in wire feeder be it is more complicated, such as：Circular runout and axial float, the axis of molybdenum filament due to wire storage cylinder and guide wheel
When the deformation of line, the abrasion of radial direction, the abrasion of wire feeder are loosened and processed the effects that Discharge Force, the footpath of molybdenum filament may be all influenced
To stability, molybdenum filament shake and tiltedly can timely and accurately be grasped with the state of on-line checking molybdenum filament radial motion by the present apparatus
The data such as degree note abnormalities and alarm and can do respective handling, realize on-line prediction fracture of wire defencive function.
2nd, the present apparatus directly measures the radial stability of processing sections molybdenum filament, and the machinery than being mounted remotely from processing sections molybdenum filament connects
The precision of touch strain measuring method is high, reaction speed is fast.
3rd, the present apparatus can be carried out at the same time the jitter measurement of orthogonal both direction, and can obtain molybdenum filament in flat field and shake track
Information, this information are conducive to further research and analyse reasonability, the science of wire feeder.
4th, the present apparatus can realize gradient on-line checking, once find that slope deviation is excessive, prompting alarm immediately.
5th, by the present apparatus to because Discharge Force effect cause molybdenum filament shake become larger when, high frequency electric source output work can be reduced automatically
Rate blows an occurrence probability so as to be conducive to raising machining accuracy and reduction.
6th, the present apparatus uses non-cpntact measurement, on the one hand, avoids as the error caused by measuring device contact molybdenum filament；Separately
On the one hand, for processing sections molybdenum filament often in moist adverse circumstances, other manner sensor is difficult to accomplish on-line measurement.
7th, when setting for machine operates or is abnormal situation, once molybdenum filament is easy to be pulled off by workpiece dragging, this dress
Putting can detect that molybdenum filament gradient is excessive in time, and stop table moves immediately, realize molybdenum filament and pull protection.
8th, the present apparatus can carry out joint control with tension and taper degree control device, when finding that molybdenum filament shake and gradient can when abnormal
It is automatically adjusted, improves the intelligent level of equipment.
9th, radial position detection is implemented to processing sections molybdenum filament, such as：The parameters such as shake, gradient and tension are linear cutting equipment
Molybdenum filament status information promptly and accurately is provided.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and embodiments：
Fig. 1 is the overall structure diagram of this nc wire-cutting molybdenum filament on-line measurement device of the embodiment of the present invention；
Fig. 2 is the partial structural diagram of this nc wire-cutting molybdenum filament on-line measurement device of the embodiment of the present invention；
Wherein：A- is cut workpiece, 1- molybdenum filaments, 101- molybdenum filament straight line active sections, 2- upper set of coils, 201- left coils I,
The right coils I of 202-, coil I before 203-, 3- lower coil groups, 301- left coils II, the right coils II of 302-, coil II before 303-, 4-
High frequency cutting power supply, 5- signal processing circuits, 501- differential amplifier circuits, pedestal in 8- annulars, the lower pedestal of 9- annulars, on 10a-
Magnetic core I, the upper magnetic cores II of 10b-, magnetic core I under 11a-, magnetic core II under 11b-, 12- wire slide carriages, 13- wire storage cylinders, the upper pairs of 14- are led
It takes turns, secondary guide wheel under 15-, 16- tensioners, 17- upper blocks, 18- lower tumblers, the upper conducting blocks of 19-, conducting block under 20-, on 21-
Filar guide, filar guide under 22-, 23- frequency converters, 24- motors, 25- digital control systems, 26- stepper motor drivers, 27- taper tune
Regulating device.
Specific embodiment
Fig. 1 and Fig. 2 illustrates a specific embodiment of this nc wire-cutting molybdenum filament on-line measurement device of the present invention,
It is well known that the molybdenum filament 1 of nc wire-cutting includes cutting the molybdenum filament straight line active section 101 of workpiece, and the master of the present apparatus
Act on and be on-line measurement 101 radial position of molybdenum filament straight line active section variation, so analyze and process obtain molybdenum filament shake and
The important informations such as gradient.
The line cutting processing of nc wire-cutting is the quilt with metal by the use of mobile molybdenum filament as electrode " knife " at present
It cuts workpiece A and occurs electric discharge corrosion, molybdenum filament, which moves back and forth, to be realized by the wire storage cylinder rotating in wire feeder.Such as Fig. 1
Shown, the wire feeder of nc wire-cutting includes：Frequency converter 23, motor 24, wire slide carriage 12, wire storage cylinder 13, upper secondary guide wheel
14th, lower secondary guide wheel 15, tensioner 16, upper block 17, lower tumbler 18, upper conducting block 19, lower conducting block 20,21 and of upper filar guide
Lower filar guide 22.During cutting processing, molybdenum filament electrode is moved with certain speed along its axis direction, it constantly enters and leaves joint-cutting
Interior region of discharge.
Since wire storage cylinder drives molybdenum filament doing the movement of high speed axis, each component in wire feeder is constantly changing molybdenum filament again
The direction of motion, simultaneously because the circular runout of wire storage cylinder and guide wheel and axial float, the axis deformation of molybdenum filament, the mill of radial direction
Discharge Force effect the etc. when abrasion of damage, wire feeder is loosened and processed, the above situation inevitably leads to molybdenum filament and generates footpath
To shake, it is easy to the problems such as generating secondary discharge or short circuit, so that influencing processing efficiency and product quality or even once trembling
Dynamic amplitude is more than wire electrode elastic limit, will result in the serious consequence of fracture of wire.Therefore, processing sections molybdenum filament on-line checking is always
NC Electrical Manufacture Tool key technical problem urgently to be resolved hurrily.And this nc wire-cutting molybdenum filament shown in Fig. 1 and Fig. 2 is online
Measuring device is exactly to be developed to solve this technical problem.
This nc wire-cutting molybdenum filament on-line measurement device of the present embodiment mainly includes：High frequency cutting power supply 4, coil
Group 2, lower coil group 3 and signal processing circuit 5.Wherein：High frequency cutting power supply 4 has component by oneself for existing nc wire-cutting,
For being passed through the high-frequency pulse current of the cut workpiece A of flow direction to the upper and lower ends of the molybdenum filament straight line active section 101, thus with
It is cut workpiece A and electric discharge corrosion occurs, to cut workpiece.Upper set of coils 2 is arranged in the radial direction of the molybdenum filament straight line active section 101
Outside, and between the cut workpiece A and 101 upper end of molybdenum filament straight line active section, it is specifically located at seal wire
The lower section of device 21.According to galvanomagnetic-effect, in cutting process, stream has high-frequency pulse current in molybdenum filament straight line active section 101, so as to
Alternating magnetic field is generated around it, and then induced voltage is generated in the upper set of coils 2.It is straight that lower coil group 3 is arranged in the molybdenum filament
The radial outside of line active section 101, and between the cut workpiece A and 101 lower end of molybdenum filament straight line active section,
It is specifically located at the top of lower filar guide 22.According to galvanomagnetic-effect, in cutting process, stream has height in molybdenum filament straight line active section 101
Frequency pulse current so as to generate alternating magnetic field around it, and then also generates induced voltage in the lower coil group 2.At signal
Reason circuit 5 is connected with the upper set of coils 2 and lower coil group 3, and can obtain and the upper set of coils 2 and offline
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
It makes, it can be ensured that the uniformity of the two structure, and upper set of coils 2 and lower coil group 3 overlap cloth in vertical direction (Z-direction)
It puts, i.e., upper set of coils 2 and lower coil group 3 are in X, Y-direction position consistency.
The operation principle of the present apparatus is as follows：
This is as conducting wire always, and what is flowed through in line electrode is dither current for molybdenum filament electrode (also known as line electrode), this
When generate alternating magnetic field around molybdenum filament straight line active section 101, the size of this magnetic field intensity in molybdenum filament straight line active section 101
Electric current I it is related with conductor length r, i.e.,
B=f (I, r) (1)
In cutting on line processing, in order to improve in molybdenum filament straight line active section 101 by electric current (high frequency electric source is from belt current
Known to measuring circuit, i.e. electric current), to being cut workpiece electrical discharge indeed through upper and lower section 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
Power jointly 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 by size of current be the same, by the processing to two paths of data, so as to which cancellation current and other disturbances are to induced electricity
The influence of pressure, so the ratio of induced voltage and difference be only and molybdenum filament straight line in induced voltage and lower coil group 3 in upper set of coils 2
The position of active section 101 is related, once in cutting processing, occur causing the upper and lower radial offset deviation of molybdenum filament because of a variety of causes, all
It can be showed in the form of the size 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 critical data to be treated, be utilized respectively the ratio and difference data can eliminate various disturbances to surveying
The influence of amount, and it is more accurate to the comprehensive descision of measurement result using above two data.If molybdenum filament straight line active section
101 without shaking, then the multiple ratio and difference relative measurements obtained by signal processing circuit 5 is consistent；When
Molybdenum filament straight line active section 101 generates shake due to various reasons, then reaching the standard grade positioned at 101 first half office of molybdenum filament straight line active section
In circle group 2 induced voltage and in the lower coil group 3 of 101 lower half office of molybdenum filament straight line active section the ratio of induced voltage and
Difference multiple measurement results are inconsistent, and this variation can be accurately detected by signal processing circuit 5, when detected value is more than
Setting threshold values is then alarmed and respective handling.
In order to improve the measurement accuracy to molybdenum filament straight line active section jitter conditions, while convenient for calculating the work of molybdenum filament straight line
The upper set of coils 2 and coil 3 are arranged to following structure type by the gradient of section, the present embodiment：
Upper set of coils 2 is made of X spaced one on the other to coil and Y-direction coil, the X to coil by
The left coil I 201 of arc-shaped structure and the right coil I 202 of arc-shaped structure are formed, the left coil I 201 and right coil I 202
Horizontal symmetrical is arranged at left and right sides of the radial direction of the molybdenum filament straight line active section 101.Y-direction coil by arc-shaped structure front
Enclose I (not shown) of the rear coil composition of I 203 and arc-shaped structure, and I horizontal symmetrical of the preceding coil I 203 and rear coil
It is arranged in the radial direction front and rear sides of the molybdenum filament straight line active section 101.
Lower coil group 3 is made of X spaced one on the other to lower coil and Y-direction lower coil, the 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 formed, the left coil II 301 and right coil
II 302 horizontal symmetricals are arranged at left and right sides of the radial direction of the molybdenum filament straight line active section 101；The Y-direction lower coil is by arc-shaped
The preceding coil II 303 of structure and II (not shown) of rear coil of arc-shaped structure are formed, and the preceding coil II 303 is with after
II horizontal symmetrical of coil is arranged in the radial direction front and rear sides of the molybdenum filament straight line active section 101；
During work, X to coil and X to lower coil it is corresponding for measurement molybdenum filament straight line active section 101 in X-direction
Gradient, Y-direction coil and Y-direction lower coil are corresponding for measurement molybdenum filament straight line 101 gradient in the Y direction of active section.
The present apparatus further includes pedestal 8 and the lower pedestal 9 of annular, the upper pedestal of annular in the annular being spaced apart one on the other
Upper magnetic core II 10b, upper I 10a of magnetic core of I 10a of upper magnetic core and circular ring shape that circular ring shape is removably installed on 8 are located at institute
The top of II 10b of magnetic core is stated, and the two and the upper pedestal 8 of the annular are coaxially arranged；On the lower pedestal 9 of the annular removably
Lower magnetic core II 11b, lower I 11a of magnetic core of I 11a of lower magnetic core and circular ring shape that are equipped with circular ring shape are located at the lower magnetic core II
The top of 11b, and the two and the lower pedestal 9 of the annular are coaxially arranged.
The left coil I 201 and right coil I 202 are symmetrically wrapped on I 10a of upper magnetic core, the preceding coil
I 203 and rear coil I before and after be symmetrically wrapped on II 10b of upper magnetic core.
The left coil II 301 and right coil II 302 are symmetrically wrapped on I 11a of lower magnetic core, the front
It encloses before and after II 303 and rear coil II and is symmetrically wrapped on II 11b of lower magnetic core.
And the radially opposite sides of the upper pedestal 8 of the annular and the lower pedestal 9 of annular are both provided with installing arm, installing arm for
Pedestal in annular 8 and the lower pedestal 9 of annular are fixed on corresponding fixing body, ensure the position of upper set of coils 2 and lower coil group 3
Put stability.
The coil of upper set of coils 2 and lower coil group 3 using paired arc-shaped symmetrical structure, not only may be used by the present embodiment
Effectively to be inhibited to common-mode signal using differential motion amplifying unit, but also position differential signal can be amplified, be improved
The precision of whole measuring circuit.
The signal processing circuit 5 includes the differential amplifier circuit 501 being connected with the upper set of coils 2 and lower coil group 3.
During actual measurement, left coil I 201 and the difference P1 of induced voltage, preceding coil I 203 and rear line in right coil I 202
Enclose difference P3, the preceding coil II 303 of induced voltage in the difference P2 of induced voltage, left coil II 301 and right coil II 302 in I
With the difference P4 of induced voltage in rear coil II, filtered, after conditioning and A/D conversions, calculated by the signal of signal processing circuit 5
The ratio and radial direction of the ratio and radial position difference (electric current is it is known that position difference hereinafter referred to as difference) of P1 and P3, P2 and P4
The ratio of position difference, wherein P1 and P3 and difference synthesis reflect gradient of the molybdenum filament straight line active section 101 in X-direction, P2 and P4
Ratio and difference synthesis reflection molybdenum filament straight line 101 gradient in the Y direction of active section.If molybdenum filament straight line active section 101 does not have
It shakes, then the multiple measurement results of P1 and P3 ratios and difference, P2 and P4 ratios and difference are consistent；When due to various
Reason molybdenum filament straight line active section 101 generates shake, then the multiple measurement knot of P1 and P3 ratios and difference, P2 and P4 ratios and difference
Fruit is inconsistent, when detected value is more than that setting threshold values is then alarmed and respective handling.
Moreover, the upper pedestal 8 of annular described in the present embodiment and the lower exhausted magnetic insulation of pedestal 9 of annular are marble material,
And the upper set of coils 2 is arranged in the radial outside of 8 central through hole of pedestal in annular, the lower coil group 3 is arranged in ring
The radial outside of 9 central through hole of pedestal under shape, to prevent molybdenum filament from colliding upper set of coils and lower coil group in processing.
In addition, the upper gear liquid cover covered on outside the upper set of coils 2 is formed on the upper pedestal 8 of annular, under the annular
The lower block liquid cover covered on outside the lower coil group 3 is formed on pedestal 9.The upper gear liquid cover and lower block liquid cover are used to prevent from cutting
Working solution is splashed into upper set of coils 2 and lower coil group 3 in the process.In order to moisture-proof, the present embodiment is in the upper set of coils 2, offline
Circle group 3, I 10a of upper magnetic core, II 10b of upper magnetic core, the outer surface of I 11a of lower magnetic core and lower II 11b of magnetic core be coated with one layer apply it is anti-
Damp insulating materials.
In addition, the signal processing circuit 5 is connected by the present embodiment with the digital control system 25 of wire cutting machine tool itself, it is actual
In 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
Then deviation completes molybdenum filament shake through digital control system and gradient calculates, so as to be completed within the specific limits by tension mechanism
Jitter suppression or control stepper motor are completed to adjust the gradient of molybdenum filament straight line work.
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.All major techniques according to the present invention
The equivalent transformation or modification that the Spirit Essence of scheme is done, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of nc wire-cutting molybdenum filament on-line measurement device, including high frequency cutting power supply (4), the high frequency cutting power supply (4)
The high-frequency impulse of the cut workpiece (A) of flow direction is passed through to the upper and lower ends of the molybdenum filament straight line active section (101) of nc wire-cutting
Electric current, it is characterised in that the device further includes：
Upper set of coils (2), the upper set of coils (2) are arranged in the radial outside of the molybdenum filament straight line active section (101), and positioned at institute
It states between cut workpiece (A) and molybdenum filament straight line active section (101) upper end；
Lower coil group (3), the lower coil group (3) are arranged in the radial outside of the molybdenum filament straight line active section (101), and positioned at institute
It states between cut workpiece (A) and molybdenum filament straight line active section (101) lower end, the lower coil group (3) and the coil
The structure of group (2) is identical, and the two overlaps arrangement in the vertical direction；
Signal processing circuit (5), the signal processing circuit (5) are connected with the upper set of coils (2) and lower coil group (3), and
Can obtain and the upper set of coils (2) and lower coil group (3) in the induced voltage that generates.
2. nc wire-cutting molybdenum filament on-line measurement device according to claim 1, it is characterised in that：The signal processing
Circuit (5) includes the differential amplifier circuit (501) being connected with the upper set of coils (2) and lower coil group (3).
3. nc wire-cutting molybdenum filament on-line measurement device according to claim 1 or 2, it is characterised in that：It is described to reach the standard grade
Circle group (2) is made of X spaced one on the other to coil and Y-direction coil, and the X is to coil by arc-shaped structure
Left coil I (201) and the right coil I (202) of arc-shaped structure form, the left coil I (201) and right coil I (202) water
It is flat to be arranged symmetrically at left and right sides of the radial direction of the molybdenum filament straight line active section (101)；The Y-direction coil is by arc-shaped structure
The rear coil I of preceding coil I (203) and arc-shaped structure is formed, and the preceding coil I (203) and I horizontal symmetrical of rear coil arrangement
In the radial direction front and rear sides of the molybdenum filament straight line active section (101)；
The lower coil group (3) is made of X spaced one on the other to lower coil and Y-direction lower coil, and the X is to lower coil
It is made of the left coil II (301) of arc-shaped structure and the right coil II (302) of arc-shaped structure, the left coil II (301)
It is arranged in right II (302) horizontal symmetrical of coil at left and right sides of the radial direction of the molybdenum filament straight line active section (101)；Under the Y-direction
Coil is made of the preceding coil II (303) of arc-shaped structure and the rear coil II of arc-shaped structure, and the preceding coil II (303)
The radial direction front and rear sides of the molybdenum filament straight line active section (101) are arranged in rear II horizontal symmetrical of coil.
4. nc wire-cutting molybdenum filament on-line measurement device according to claim 3, it is characterised in that：It further includes one on one
Under pedestal (8) and the lower pedestal (9) of annular in the annular that is spaced apart, be removably installed circle on the upper pedestal (8) of annular
The upper magnetic core I (10a) of annular and the upper magnetic core II (10b) of circular ring shape, the upper magnetic core I (10a) are located at the upper magnetic core II
The top of (10b), and the two and the upper pedestal (8) of the annular are coaxially arranged；It is removably installed on the lower pedestal (9) of the annular
There are the lower magnetic core I (11a) of circular ring shape and the lower magnetic core II (11b) of circular ring shape, the lower magnetic core I (11a) is located at the lower magnetic core
The top of II (11b), and the two and the lower pedestal (9) of the annular are coaxially arranged；
The left coil I (201) and right coil I (202) are symmetrically wrapped on the upper magnetic core I (10a), the front
It is symmetrically wrapped on the upper magnetic core II (10b) before and after I (203) of circle and rear coil I；
The left coil II (301) and right coil II (302) are symmetrically wrapped on the lower magnetic core I (11a), before described
It is symmetrically wrapped in before and after coil II (303) and rear coil II on the lower magnetic core II (11b).
5. nc wire-cutting molybdenum filament on-line measurement device according to claim 4, it is characterised in that：The upper base of annular
Frame (8) and the lower pedestal (9) of annular are marble material.
6. nc wire-cutting molybdenum filament on-line measurement device according to claim 4, it is characterised in that：The upper base of annular
It is formed on frame (8) and covers on the upper gear liquid cover of the upper set of coils (2) outside, formed on the lower pedestal (9) of the annular and cover on institute
State the lower block liquid cover of lower coil group (3) outside.
7. nc wire-cutting molybdenum filament on-line measurement device according to claim 4, it is characterised in that：The upper set of coils
(2), the appearance of lower coil group (3), upper magnetic core I (10a), upper magnetic core II (10b), lower magnetic core I (11a) and lower magnetic core II (11b)
Face is coated with one layer of painting damp proof insulation material.
8. nc wire-cutting molybdenum filament on-line measurement device according to claim 1 or 2, it is characterised in that：It is described to reach the standard grade
Circle group (2) is identical with the structure of lower coil group (3), and the two overlaps arrangement in the vertical direction.
9. nc wire-cutting molybdenum filament on-line measurement device according to claim 1 or 2, it is characterised in that：The signal
Process circuit (5) is connected with the digital control system (25) of the nc wire-cutting.
10. a kind of nc wire-cutting molybdenum filament On-line Measuring Method, it is characterised in that：It works in nc wire-cutting molybdenum filament straight line
The radial outside of section set respectively two structures it is consistent and overlap the coil group of arrangement, one of coil in vertical direction
Group is arranged between cut workpiece and molybdenum filament straight line active section upper end, another coil group is arranged in cut workpiece and molybdenum
Between silk straight line active section lower end, the upper/lower terminal of high frequency cutting power supply to molybdenum filament straight line active section is passed through two bursts of size phases
Deng flow direction be cut the high-frequency pulse current of workpiece, so as to generating alternating magnetic field around molybdenum filament straight line active section, Jin Er
Induced voltage, induced voltage in acquisition and more described two coil groups, according to induced voltage are generated in described two coil groups
Comparative result draws shake and the slope information of molybdenum filament straight line active section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610594461.5A CN106216786B (en) | 2016-07-26 | 2016-07-26 | Nc wire-cutting molybdenum filament on-line measurement apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610594461.5A CN106216786B (en) | 2016-07-26 | 2016-07-26 | Nc wire-cutting molybdenum filament on-line measurement apparatus and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106216786A CN106216786A (en) | 2016-12-14 |
| CN106216786B true CN106216786B (en) | 2018-05-22 |
Family
ID=57533481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610594461.5A Expired - Fee Related CN106216786B (en) | 2016-07-26 | 2016-07-26 | Nc wire-cutting molybdenum filament on-line measurement apparatus and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106216786B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108237276B (en) * | 2018-03-19 | 2023-05-05 | 苏州科技大学 | Device and method for automatically inhibiting molybdenum wire shape and position change |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224518A (en) * | 2008-01-28 | 2008-07-23 | 顾元章 | Wire-electrode cutting discharge machining device with double three-dimensional position coordinate systems |
| CN201108998Y (en) * | 2007-12-05 | 2008-09-03 | 冯有兵 | Calibrator matched with high speed electrical discharge wire-cutting machine |
| CN102218574A (en) * | 2010-04-16 | 2011-10-19 | 昆山徕通机电科技有限公司 | Device and method for measuring and compensating deflection of machined position of linear cutter |
| CN103286398A (en) * | 2012-02-29 | 2013-09-11 | 昆山徕通机电科技有限公司 | Device for perpendicularly adjusting line electrode in spark discharge position and adjusting method thereof |
| EP2985104A1 (en) * | 2014-08-12 | 2016-02-17 | Fanuc Corporation | Wire electric discharge machine capable of starting machining from short-circuit state |
| CN205927396U (en) * | 2016-07-26 | 2017-02-08 | 苏州科技大学 | Numerical control wire cut electrical discharge machining molybdenum filament on - line measuring device |
-
2016
- 2016-07-26 CN CN201610594461.5A patent/CN106216786B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201108998Y (en) * | 2007-12-05 | 2008-09-03 | 冯有兵 | Calibrator matched with high speed electrical discharge wire-cutting machine |
| CN101224518A (en) * | 2008-01-28 | 2008-07-23 | 顾元章 | Wire-electrode cutting discharge machining device with double three-dimensional position coordinate systems |
| CN102218574A (en) * | 2010-04-16 | 2011-10-19 | 昆山徕通机电科技有限公司 | Device and method for measuring and compensating deflection of machined position of linear cutter |
| CN103286398A (en) * | 2012-02-29 | 2013-09-11 | 昆山徕通机电科技有限公司 | Device for perpendicularly adjusting line electrode in spark discharge position and adjusting method thereof |
| EP2985104A1 (en) * | 2014-08-12 | 2016-02-17 | Fanuc Corporation | Wire electric discharge machine capable of starting machining from short-circuit state |
| CN205927396U (en) * | 2016-07-26 | 2017-02-08 | 苏州科技大学 | Numerical control wire cut electrical discharge machining molybdenum filament on - line measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106216786A (en) | 2016-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Maher et al. | Review of improvements in wire electrode properties for longer working time and utilization in wire EDM machining | |
| CN106216786B (en) | Nc wire-cutting molybdenum filament on-line measurement apparatus and method | |
| CN105290548B (en) | Multi-shaft interlocked ultrasonic modulation electrochemical micromachining system | |
| Mujumdar et al. | Experimental characterization of the reverse micro-electrodischarge machining process for fabrication of high-aspect-ratio micro-rod arrays | |
| Rajurkar et al. | Improvement of EDM performance with advanced monitoring and control systems | |
| CN203062967U (en) | Diamond fretsaw device | |
| KR20140061977A (en) | Electric discharge machining die sinking device and related method of operation | |
| CN103252543B (en) | Method and device for electrochemical machining of ultra-thin workpiece | |
| CN205927396U (en) | Numerical control wire cut electrical discharge machining molybdenum filament on - line measuring device | |
| Chen et al. | Influence of pulse waveform on machining accuracy in electrochemical machining | |
| US4609803A (en) | TW-EDM method and apparatus with a ferromagnetic wire electrode | |
| CN108237276B (en) | Device and method for automatically inhibiting molybdenum wire shape and position change | |
| CN201693263U (en) | Pore cluster-machining device | |
| Allen et al. | Typical metrology of micro-hole arrays made in stainless steel foils by two-stage micro-EDM | |
| JP2001341052A (en) | Work machining method, tool breakage detection method, and machining device | |
| CN208866547U (en) | A kind of device of automatic inhibition molybdenum filament form and position | |
| CN208262024U (en) | Digital control wire-electrode cutting wire electrode space morpheme control device and nc wire-cutting | |
| CN203765120U (en) | Numerical control gantry type wire cut electrical discharge machine | |
| CN106199180B (en) | Online steel wire jitter early warning system and method | |
| CN212143998U (en) | Pay-off device of wire drawing machine | |
| Hsue et al. | Dual-axial Ultrasonic Assisted Wire-EDM Process with Vibration Exerted through the Upper Guide | |
| CN107626999A (en) | A kind of wire cutting machine tool | |
| Chen et al. | Study of an ultrafine w-EDM technique | |
| CN106112153A (en) | Nc wire-cutting molybdenum filament vertical survey bearing calibration and device | |
| CN213646228U (en) | Wire guide mechanism of medium-speed wire cut electrical discharge machining tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180522 Termination date: 20210726 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |