CN109041572A - Wire electric discharge machine and wire electric discharge machining method - Google Patents
Wire electric discharge machine and wire electric discharge machining method Download PDFInfo
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- CN109041572A CN109041572A CN201780003444.2A CN201780003444A CN109041572A CN 109041572 A CN109041572 A CN 109041572A CN 201780003444 A CN201780003444 A CN 201780003444A CN 109041572 A CN109041572 A CN 109041572A
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- side clearance
- voltage
- electric discharge
- machining
- interpolar
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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
- B23H7/14—Electric circuits specially adapted therefor, e.g. power supply
- B23H7/18—Electric circuits specially adapted therefor, e.g. power supply for maintaining or controlling the desired spacing between electrode and workpiece
-
- 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
- B23H7/04—Apparatus for supplying current to working gap; Electric circuits specially adapted therefor
-
- 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
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
-
- 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
- B23H2500/00—Holding and positioning of tool electrodes
- B23H2500/20—Methods or devices for detecting wire or workpiece position
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
A kind of wire electric discharge machine occurs electric discharge between machined object and line electrode and processes to the machined object, which includes drive dynamic control device (20), controls the relative distance of line electrode and machined object；Interpolar is averaged machining voltage test section (40), detects to the machining voltage that is averaged of the interpolar between line electrode and machined object；Process velocity control unit (43) is averaged machining voltage and preset target voltage based on interpolar, is controlled drive dynamic control device；And voltage correction portion is corrected be averaged any one of machining voltage or target voltage of interpolar, so that the side clearance between line electrode and machined object is independently made to become constant with machine direction based on the machining information and machine direction in processing.
Description
Technical field
The present invention relates to a kind of wire electric discharge machine processed by line electric discharge to machined object and line electro-discharge machinings
Method.
Background technique
As the ameliorative way of the machining accuracy in line electro-discharge machining, as shown in the technique disclosed in Patent Document 1, mention
There are following technologies out, that is, the machining state in processing is detected, it is flat to setting voltage or interpolar according to machining state
At least either in equal machining voltage is corrected, so that the side clearance between line electrode and machined object becomes perseverance
It is fixed.Hereby it is achieved that the raising of the machining accuracy based on machining state.
In addition, in wire electric discharge machine, in order to keep the power supply to line electrode good, the confession that will be electrically connected with processing power source
Electric part is pushed to line electrode and is processed.In online electro-discharge machining, it is put in the line electrode side opposite with machined object
Electricity, but the line electrode consumption with electric discharge are then sent out so if executing electro-discharge machining on the direction pushed to power supply part
Deviate the position of raw electrode centers.If executing finishing in the state that the position for generating electrode centers is deviateed, finish
Size fluctuates, thus according to machine direction and finishing size fluctuates.
Patent document 1: No. 5794401 bulletins of Japanese Patent No.
Summary of the invention
In recent years, high manufacturing accuracy is required to wire electric discharge machine, for such as above-mentioned finishing Chinese musical scale according to machine direction
It is very little constantly to seek countermeasure, but in the technique disclosed in Patent Document 1 there is a situation where fluctuating, it does not carry out dependent on processing
The correction in direction.
The present invention is exactly proposition in view of the foregoing, it is intended that a kind of wire electric discharge machine is obtained, it can
The fluctuation of processing dimension error dependent on machine direction is inhibited.
In order to solve above-mentioned problem, purpose is realized, the present invention is a kind of wire electric discharge machine, in machined object and line
Electric discharge occurs between electrode and the machined object is processed, which includes drive dynamic control device, right
The relative distance of line electrode and machined object is controlled；And interpolar is averaged machining voltage test section, to line electrode and by
Interpolar between the machining object machining voltage that is averaged is detected.It is a feature of the present invention that process velocity control unit is also included,
It is based on interpolar and is averaged machining voltage and preset target voltage, controls drive dynamic control device；And voltage school
Positive portion is averaged any one of machining voltage or target voltage to interpolar based on the machining information and machine direction in processing
It is corrected, so that the side clearance between line electrode and machined object is independently made to become constant with machine direction
The effect of invention
Wire electric discharge machine of the present invention realizes following effects, that is, to the processing dimension for depending on machine direction
The fluctuation of error is inhibited.
Detailed description of the invention
Fig. 1 is the structure chart for the wire electric discharge machine that embodiments of the present invention 1 to 4 are related to.
Fig. 2 be illustrate line electrode in the plane vertical with set direction that embodiment 1 is related to it is non-processing when shape
The figure of shape.
Fig. 3 is shape when illustrating the finishing of the line electrode in the plane vertical with set direction that embodiment 1 is related to
The figure of shape.
Fig. 4 is other when illustrating the finishing with the line electrode in set direction vertical plane that embodiment 1 is related to
The figure of shape.
Fig. 5 is the figure of the relationship of the line electrode and machined object when indicating the finishing that embodiment 1 is related to.
Fig. 6 is the figure for the processing dimension error dependent on machine direction for indicating that embodiment 1 is related to.
Fig. 7 is the figure of the detailed structure for the Working control device for indicating that embodiment 1 is related to.
Fig. 8 is the block diagram of the more detailed structure for the Working control device for indicating that embodiment 1 is related to.
Fig. 9 is the figure of the hardware configuration for the computer numerical control device for indicating that embodiment 1 is related to.
Figure 10 is the change for indicating side clearance corrected value and processing dimension in wire electric discharge machine that embodiment 1 is related to
The figure of the relationship of change amount.
Figure 11 is the figure of the detailed structure for the Working control device for indicating that embodiments of the present invention 2 are related to.
Figure 12 is the block diagram of the more detailed structure for the Working control device for indicating that embodiment 2 is related to.
Specific embodiment
In the following, being based on attached drawing, the wire electric discharge machine and line electro-discharge machining that the embodiment that the present invention will be described in detail is related to
Method.In addition, the present invention is not limited to present embodiments.
Embodiment 1.
Fig. 1 is the structure chart for the wire electric discharge machine 100 that embodiments of the present invention 1 are related to.Wire electric discharge machine 100 has
Have: line electrode 30；Top power supply part 31 and lower part power supply part 32, they are contacted with line electrode 30；Processing power source 35；And work
Platform 9 is used to carry machined object 13.Top power supply part 31 and lower part power part 32 to be kept well to line electrode 30
Power supply is pushed across line electrode 30 to top pushing block 33, lower part pushing block 34.
In addition, wire electric discharge machine 100 includes drive dynamic control device 20, by X-axis driving device 7 and Y-axis driving device
8 are constituted；And top wire guiding nipple 1 and lower part wire guiding nipple 2, they are penetrated through for line electrode 30 respectively.X-axis driving device 7 is along X-axis side
To keeping workbench 9 mobile, Y-axis driving device 8 makes workbench 9 mobile along the y axis.Herein, X-direction and Y direction are
Orthogonal 2 directions in the face vertical with the up and down direction of Fig. 1, the i.e. set direction of line electrode 30.In addition, under
Face, the direction that machine direction is set as in the face comprising X-direction and Y direction as an example and be illustrated, but add
Work direction is not limited to the direction in the face vertical with the set direction of line electrode 30.
Top wire guiding nipple 1 has the hole that guides to line electrode 30, the top of machined object 13 to line electrode 30 into
Row positioning.Lower part wire guiding nipple 2 has the hole guided to line electrode 30, carries out in the lower section of machined object 13 to line electrode 30
Positioning.When tilting line electrode 30, the upper and lower fulcrum of top wire guiding nipple 1 and lower part wire guiding nipple 2 as line electrode 30.
Drive dynamic control device 20 keeps the workbench 9, top wire guiding nipple 1 and lower part wire guiding nipple 2 that carry machined object 13 any
Person is all mobile.Drive dynamic control device 20 is controlled the relative distance between line electrode 30 and machined object 13
Drive system.Herein, as an example, being set as X-axis driving device 7 and Y-axis driving device 8 keeps workbench 9 mobile
And it is illustrated.If X-axis driving device 7 and Y-axis driving device 8 drive workbench 9, top wire guiding nipple 1 and under
It is relatively moved relative to machined object 13 in X/Y plane the position of portion's wire guiding nipple 2.
In addition, wire electric discharge machine 100 includes spool 3, supply line electrodes 30；Supply roller 4 converts line electrode 30
Direction of travel, and clamp line electrode 30；Lower rollers 5 convert the direction of travel of line electrode 30；And recycling roll 6, time
Receive the line electrode 30 that direction has been converted by lower rollers 5.
In addition, wire electric discharge machine 100 includes processing power source 35；Working control device 111, to drive dynamic control device
20 are controlled；And data input/output device 120, become the input-output unit of operator.Top power part 31 and
Lower part power supply part 32 and machined object 13 are connect with processing power source 35 respectively.Processing power source 35 is supplied to top power supply part 31 and lower part
Apply voltage between electric part 32 and machined object 13.Wire electric discharge machine 100 passes through in the machined object 13 for being equipped on workbench 9
It discharges between line electrode 30, electro-discharge machining thus is carried out to machined object 13.
Operator inputs processing conditions, processing program and control parameter to data input/output device 120.Machining control dress
111 are set based on the processing conditions, processing program and control parameter inputted by operator via data input/output device 120, it is right
Drive dynamic control device 20 is controlled.That is, Working control device 111 and data input/output device 120 constitute computer numerical control
(Computerized Numerical Control:CNC) device.
In the wire electric discharge machine 100 constituted as described above, line electrode 30 is sent out from spool 3, is become by supply roller 4
Change direction.Then, line electrode 30 is by hole possessed by hole possessed by top wire guiding nipple 1 and lower part wire guiding nipple 2, by upper
During between portion's wire guiding nipple 1 and lower part wire guiding nipple 2, the electro-discharge machining to machined object 13 is carried out.Line electrode 30 is by lower part
It after wire guiding nipple 2, is changed direction by lower rollers 5, recycling bins (not shown) is recycled to by recycling roll 6.
Fig. 2 be illustrate line electrode 30 in the plane vertical with set direction that embodiment 1 is related to it is non-processing when
The figure of shape.Fig. 3 is when illustrating the finishing of the line electrode 30 in the plane vertical with set direction that embodiment 1 is related to
The figure of shape.Fig. 4 is when illustrating the finishing of the line electrode 30 in the plane vertical with set direction that embodiment 1 is related to
The figure of other shapes.Fig. 5 is the relationship of the line electrode 30 and machined object 13 when indicating the finishing that embodiment 1 is related to
Figure.
Fig. 2 to Fig. 4 is line electrode 30, the lower part wire guiding nipple indicated from workbench 9 to from the set direction of line electrode 30
2, the figure of the configuration relation of lower part power supply part 32 and lower part pushing block 34.Situation when Fig. 2 indicates non-processing, Fig. 3 indicate with
Situation when electric discharge finishing is carried out at the face for the line electrode 30 that lower part pushing block 34 contacts, Fig. 4 expression is powered with lower part
Situation when electric discharge finishing has been carried out at the face for the line electrode 30 that part 32 contacts.Fig. 5 indicates line electrode 30 and machined object 13
Between anterior diastema and side clearance.Side clearance is line electrode 30 and machined object 13 on the direction vertical with machine direction
Between interval.
As shown in Fig. 2, line electrode 30 it is non-processing when shape be it is roughly circular, the center of line electrode 30 be as line electricity
The center of pole 30 and the position controlled by Working control device 111.In contrast, in Fig. 3 and Fig. 4, due to essence
The consumption of line electrode 30 in processing, in 1 shape processing, the reality of line electrode 30 according to the machine direction for executing finishing
Deviateed from the center as line electrode 30 by the position that Working control device 111 is controlled at border center.As the knot
Fruit is deviateed in side-play control, thus occur according to machine direction and geomery fluctuate the problem of.
Fig. 6 is the figure for the processing dimension error dependent on machine direction for indicating that embodiment 1 is related to.By X-axis just
Direction is set as 0 degree, when the positive direction of Y-axis to be set as to 90 degree, the point 50 that indicates processing dimension error relative to machine direction θ
Distance 51 away from origin shows the value of processing dimension error.Son in case where machine direction θ=45 degree is illustrated, distance
In the case that 51 are 45 degree of the direction by the machine direction of Fig. 5 for Fig. 6, the processing dimension phase in the direction vertical with machine direction
Error, that is, processing dimension error of design value is shown by distance 51.If to the case where processing dimension error is zero is indicated
The value of distance 51 is set, then the size of distance 51 is bigger compared with the value, indicates to be directed to machined object compared to design value
13 processing residual is more, and the size of distance 51 is smaller compared with the value, indicates to be directed to machined object 13 more compared to design value
It is cut deeply.
Therefore, as shown in Figure 6, it is known that processing dimension error and machine direction are independently non-constant.As described above, according to adding
Work direction and the processing dimension error finished changes and one of reason, it is contemplated that due to the essence for using Fig. 3 and Fig. 4 to illustrate
The consumption of line electrode 30 in processing, the center of line electrode 30 change according to machine direction.Herein, from machining control
Viewpoint expectation processing dimension error and machine direction independently become steady state value.I.e., it is generally desirable to which the point 50 of Fig. 6 is arranged in together
On heart circle.
Fig. 7 is the figure of the detailed structure for the Working control device 111 for indicating that embodiment 1 is related to.In Fig. 7, in order to
The structure for explaining Working control device 111 in detail, by other knots as line electrode 30, machined object 13 and processing power source 35
Structure simplification is shown.
Working control device 111 is averagely processed based on the interpolar between processing program and line electrode 30 and machined object 13
Voltage controls process velocity via drive dynamic control device 20.Process velocity is between line electrode 30 and machined object 13
Relative velocity.
Working control device 111 includes interpolar and is averaged machining voltage test section 40, carries out to the interpolar machining voltage that is averaged
Detection；Side clearance estimator 45 estimates the side clearance in processing and is exported as side clearance presumed value；Side
Gapping instruction device 46 exports side gapping instruction value based on machine direction；And side clearance controller 47, generate pole
Between average machining voltage corrected value and export so that side clearance presumed value follows side clearance instruction value.
Also, Working control device 111 includes interpolar and is averaged machining voltage correction unit 41, will averagely be added by interpolar
The interpolar that work voltage detection department 40 the detects machining voltage that is averaged is corrected using corrected value；Target voltage storage unit 44,
Storage using the machining voltage that is averaged of the interpolar as target in order to be processed and preset target voltage；Voltage operational portion
42, to the interpolar after correction be averaged the voltage difference between machining voltage and target voltage carry out operation；And process velocity control
Portion 43 processed, in a manner of the voltage absolute value of the difference reduction for making to be found out by voltage operational portion 42, via drive dynamic control device 20
Process velocity is controlled.Interpolar is averaged machining voltage correction unit 41, side clearance estimator 45, side clearance instruction device 46
And side clearance controller 47 is constituted and is averaged the corrected voltage correction portion of machining voltage to interpolar.
Side clearance estimator 45 is estimated according to the machining information in finishing between the side in processing, is exported and is
Side clearance presumed value.Be averaged machining voltage, process velocity, plate thickness, letter as offset in machining information comprising interpolar
Breath.Side-play presumption method be it is well known, in Fig. 6 etc. of patent document 1, illustrate that side clearance is based on interpolar and averagely adds
The case where work voltage and process velocity determine.In the embodiment 1, side clearance estimator 45 as an example, is set as base
In by interpolar be averaged the interpolar that machining voltage test section 40 detects be averaged machining voltage and from process velocity control unit 43 must
To process velocity and the structure that finds out side clearance presumed value and export.
Side clearance instruction device 46 has side clearance corresponding with machine direction corrected value.It is corresponding with machine direction
Side clearance corrected value be to be determined for each machine direction for side-play corrected value, so that according in Fig. 6
The processing dimension error and machine direction that the experimental data shown obtains independently become steady state value.Specifically, side clearance
Corrected value is to make side clearance and machine direction independently become the corrected value that constant mode is found out.It is corresponding with machine direction
Side clearance corrected value can also precompute and by operator via data input/output device 120 assign between side
Gap instruction device 46.Alternatively, it is also possible to depend on processing for as shown in FIG. 6 via data input/output device 120 by operator
The data of the processing dimension error in direction are assigned to side clearance instruction device 46, and side clearance instruction device 46 is based on dependent on processing
The processing dimension error in direction and side clearance corresponding with machine direction corrected value is calculated and is kept.With machine direction
Corresponding side clearance corrected value is finite number evidence corresponding with limited machine direction.Side clearance instruction device 46 also has
As the side clearance instruction value before the correction independent of the fixed value of machine direction.Side clearance instruction device 46 is controlled from driving
Device 20 processed obtains machine direction, and the side clearance before side clearance corresponding with machine direction corrected value and correction is instructed
Value is added and finds out the side clearance instruction value after correction and export.Therefore, in above-mentioned limited machine direction, side clearance
Instruction value is corrected.
Side clearance controller 47 is so that side clearance presumed value is followed between the side exported by side clearance instruction device 46
The mode of gap instruction value find out interpolar be averaged machining voltage corrected value and output.Herein, side clearance controller 47 can be with
It is to be set as inputting by the deviation of side clearance instruction value and side clearance presumed value as input-output characteristic, interpolar is averagely added
The corrected value of work voltage be set as output input-output characteristic and with proportionality controller, be also possible to common servo
System has integral characteristic or derivative characteristic like that.In addition, side clearance controller 47 also can have nonlinear input
Output characteristics.As long as side clearance controller 47 is defeated in a manner of following side clearance presumed value to side clearance instruction value
Interpolar is averaged the structure of the corrected value of machining voltage out, then there is no limit for its structure.
Fig. 8 is the block diagram of the more detailed structure for the Working control device 111 for indicating that embodiment 1 is related to.
In fig. 8, the processing that side clearance instruction device 46 is assigned based on the drive dynamic control device 20 for omitting record from Fig. 8
Direction finds out the side clearance instruction value corrected by side clearance corrected value as described above and exports.Side clearance presumption
Device 45 based on the interpolar by omitting record in Fig. 8 be averaged the interpolar that machining voltage test section 40 detects be averaged machining voltage,
With the process velocity obtained from process velocity control unit 43, finds out side clearance presumed value and export.In fig. 8, by the side of Fig. 7
A part of the function of face clearance controller 47 is shown except side clearance controller 47 as subtracter 49.Subtracter 49
The deviation for finding out side clearance instruction value and side clearance presumed value is input to side clearance controller 47.Side clearance control
Device 47 based on the deviation found out by subtracter 49, find out interpolar be averaged machining voltage corrected value and output.In addition, subtracter 49
Function can also be had as illustrated in fig. 7 by side clearance controller 47.The interpolar machining voltage correction unit 41 that is averaged is addition
Device, the interpolar that machining voltage test section 40 detects that will be averaged by interpolar are averaged machining voltage and by side clearance controller 47
The be averaged corrected value of machining voltage of the interpolar of output is added and the interpolar after output calibration is averaged machining voltage.Voltage operational portion 42
It is subtracter, to average from the interpolar after the target voltage and correction that the target voltage storage unit 44 for omitting record in Fig. 8 obtains
Voltage difference between machining voltage carries out operation, is input to process velocity control unit 43.It is defeated that process velocity control unit 43 finds out institute
The process velocity of the voltage absolute value of the difference reduction entered is assigned to drive dynamic control device 20.Drive dynamic control device 20 is somebody's turn to do with becoming
The mode of process velocity controls the relative distance of line electrode 30 and machined object 13.It therefore, include that interpolar averagely adds
The voltage correction portion in work voltage correction portion 41 is to make independently to make with machine direction side clearance to become constant mode to interpolar
Average machining voltage is corrected.That is, the wire electric discharge machine 100 being related to according to embodiment 1, it can control and be, so that
The angle of side clearance and machine direction in the case where being processed in some rectilinear direction changes and in other straight line
Side clearance in the case where being processed on direction becomes identical value.
Fig. 9 is the figure of the hardware configuration for the computer numerical control device for indicating that embodiment 1 is related to.By Working control device
111 and data input/output device 120 function using in computer implemented situation, Working control device 111 and data are defeated
Enter the function of output device 120 as shown in figure 9, by CPU (Central Processing Unit) 201, memory 202, storage
Device 203, display device 204 and input unit 205 are realized.
The function of Working control device 111 is realized by the combination of software, firmware or software and firmware.Software, firmware or
The combination of person's software and firmware is described as program and is stored to storage device 203.CPU 201 will be by that will be stored in storage device
203 above procedure reads out to memory 202 and executes, and thus carries out the function of Working control device 111.That is, computer number
Device is controlled when executing the function of Working control device 111 by computer, has storage device 203, which uses
The above procedure executed in the result of the step of to by the function of implementing Working control device 111 stores.In addition, above-mentioned
Program can also make computer execute the wire electric discharge machining method for realizing the function of Working control device 111.Therefore, above-mentioned
It also include above-mentioned processing program in program.Data input/output device 120 passes through input unit 205 and display device 204
It realizes.The concrete example of input unit 205 is keyboard, mouse, touch panel etc..The concrete example of display device 204 is monitor, shows
Show device etc..In addition, target voltage storage unit 44 is realized by memory 202 or storage device 203.Memory 202 it is specific
Example is equivalent to the storage region of volatibility as RAM (Random Access Memory).The concrete example phase of storage device 203
When in non-volatile or volatibility semiconductor memory, disk.
Figure 10 is the side clearance corrected value and processing dimension indicated in wire electric discharge machine 100 that embodiment 1 is related to
Variable quantity relationship figure.Figure 10 is shown when having carried out processing by steel of the wire electric discharge machine 100 to thickness 60mm,
Variable quantity of the processing dimension relative to used side clearance corrected value.The variable quantity of processing dimension is corrected relative to side clearance
Value and linearly elapse.Therefore, by wire electric discharge machine 100, passing through the corrected side of side clearance corrected value
Gapping instruction value is shown by being controlled and bring validity side clearance.
That is, the wire electric discharge machine 100 being related to according to embodiment 1, it can be by using corresponding with machine direction
Side clearance corrected value and make finishing side clearance variation, to control processing dimension.Following effects are obtained as a result,
Fruit, that is, be able to suppress machining shape and the material for each machined object 13 and the different processing dependent on machine direction
The fluctuation of scale error.As a result, the adjustment of processing conditions becomes easy.
Embodiment 2.
The structure chart for the wire electric discharge machine 100 that embodiments of the present invention 2 are related to is in addition to becoming Working control device 111
It is identical as Fig. 1 except Working control device 112 more described below.In the wire electric discharge machine 100 that embodiment 2 is related to
In, target voltage is corrected rather than the interpolar machining voltage that is averaged is corrected.In addition, Working control device 112 and
The hardware configuration for the computer numerical control device that data input/output device 120 is constituted is also identical as Fig. 9.
Figure 11 indicates the figure of the detailed structure for the Working control device 112 that embodiments of the present invention 2 are related to.In Figure 11
In, in order to which the structure to Working control device 112 is described in detail, simplifies and line electrode 30, machined object 13 are shown and added
Other structures as work power supply 35.Below, saying for 111 identical point of Working control device being related to embodiment 1 is omitted
It is bright, carry out the explanation of difference.
Side clearance controller 47 is so that side clearance presumed value is followed between the side exported by side clearance instruction device 46
The mode of gap instruction value finds out the corrected value of target voltage and output.The concrete example of the corrected value of target voltage is to make embodiment
1 interpolar be averaged machining voltage corrected value label reversion obtained from be worth.Herein, side clearance controller 47 can be
The deviation of side clearance instruction value and side clearance presumed value is set as input as input-output characteristic, by the school of target voltage
Positive value be set as export and with proportionality controller, can also have as common servo-system integral characteristic or
Derivative characteristic.In addition, side clearance controller 47 also can have nonlinear input-output characteristic.Side clearance controller 47
As long as exporting the structure of the corrected value of target voltage in a manner of following side clearance presumed value to side clearance instruction value
, there is no limit for structure.
Target voltage correction unit 48 uses the corrected value of the target voltage obtained from side clearance controller 47, to by target
The target voltage that voltage storage unit 44 exports is corrected.Voltage operational portion 42 is averaged machining voltage test section 40 to by interpolar
The interpolar detected be averaged machining voltage with from the target voltage after the correction that target voltage correction unit 48 obtains voltage difference into
Row operation.Target voltage correction unit 48,47 structure of side clearance estimator 45, side clearance instruction device 46 and side clearance controller
The pairs of corrected voltage correction portion of target voltage.
Figure 12 is the block diagram of the more detailed structure for the Working control device 112 for indicating that embodiment 2 is related to.Below,
Also the explanation for omitting 111 identical point of Working control device being related to embodiment 1, carries out the explanation of difference.
In Figure 12, and using a part of the function of the side clearance controller 47 of Figure 11 as subtracter 49 and in side
It is shown except face clearance controller 47.Side clearance controller 47 finds out target voltage based on the deviation found out by subtracter 49
Corrected value and output.In addition, the function of subtracter 49 can also be as shown in figure 11, had by side clearance controller 47.Mesh
Mark voltage correction portion 48 be adder, the target voltage that the target voltage storage unit 44 that record is omitted from Figure 12 is obtained with by
The corrected value for the target voltage that side clearance controller 47 exports is added, and the target voltage after correction is exported.Voltage operational portion
42 be subtracter, be averaged the inspection of machining voltage test section 40 to target voltage and the interpolar by omitting record in Figure 12 after correction
The interpolar the measured voltage difference between machining voltage that is averaged carries out operation, is input to process velocity control unit 43.Process velocity control
Portion 43 processed finds out the process velocity of inputted voltage absolute value of the difference reduction, assigns to drive dynamic control device 20.Drive control
Device 20 controls line electrode 30 and the relative distance of machined object 13 in a manner of as the process velocity.Therefore, include
There is the voltage correction portion of target voltage correction unit 48 to be corrected target voltage, so that independently making side with machine direction
Gap becomes constant.That is, in the wire electric discharge machine 100 that embodiment 2 is related to, it can also control and be, so that straight at some
The angle of side clearance and machine direction in the case where being processed on line direction changes and in other rectilinear direction
Side clearance in the case where being processed becomes identical value.
The wire electric discharge machine 100 being related to according to embodiment 2, by being corrected to target voltage rather than to interpolar
Average machining voltage is corrected, and can also obtain same effect as that of the first embodiment.
Embodiment 3.
In embodiment 1 or 2, the number based on processing dimension error corresponding with limited machine direction as shown in Figure 6
According to being corrected on limited machine direction to side gapping instruction value, but be also possible to that there are actual machine directions
The situation different from the machine direction for the data for obtaining processing dimension error.In order to cope with above situation, in implementation of the invention
In the wire electric discharge machine 100 that mode 3 is related to, side clearance corrected value is found out on arbitrary machine direction, to side clearance
Instruction value is corrected.
Specifically, operator is via data input/output device 120, by according to past processing result obtain such as figure
The data of processing dimension error shown in 6 dependent on machine direction are input to side clearance instruction device 46.Side clearance instruction
Device 46 can be executed interpolation and be calculated based on the data of the processing dimension error dependent on machine direction assigned, be found out any
The side clearance corrected value of machine direction.
The side clearance corrected value of any machine direction is calculated and found out as the execution interpolation of side clearance instruction device 46
Method, it is contemplated that following deformation.Firstly, side clearance instruction device 46 can also depend on limited processing based on what is assigned
The data of the processing dimension error in direction execute interpolation and calculate, find out the data of the processing dimension error of any machine direction, root
According to the data of the processing dimension error, the side clearance corrected value of any machine direction is calculated.In addition, side clearance refers to
Enable device 46 that can also find out limited add based on the data of the processing dimension error dependent on limited machine direction assigned
The side clearance corrected value in work direction executes interpolation to the side clearance corrected value of limited machine direction and calculates, and adds to any
The side clearance corrected value in work direction is calculated.In addition, the method that interpolation calculates can carry out linear interpolation between data,
Curve interpolating can also be carried out, as long as not having for the method that continuous machine direction obtains side clearance corrected value
It limits.
The wire electric discharge machine 100 being related to according to embodiment 3, realizes following effects, that is, in addition to obtaining processing ruler
Any machine direction except the machine direction of the data of very little error, also can be to the processing dimension error for depending on machine direction
Fluctuation inhibited.
Embodiment 4.
In embodiment 1 to 3, Working control device 111 or 112 needs corresponding with limited machine direction to add
Work scale error or side clearance corrected value are stored to memory 202 or storage device 203.Therefore, in reality of the invention
It applies in the wire electric discharge machine 100 that mode 4 is related to, by by the data of processing dimension error corresponding with limited machine direction
It is stored, the reduction of data volume needed for realizing with having used the function of multiple parameters to carry out approximate.As an example, it says below
It is bright by error corresponding with machine direction with the approximate situation of oval progress.Specifically, using 4 parameter a (> 0), b (>
0), c (> 0), α (- π < α≤π), the approximation e (θ) relative to the processing dimension error of machine direction θ are defined as following
Formula (1), (2).
[formula 1]
[formula 2]
Herein, the x and y of formula (1) are found out using above-mentioned formula (2).
It can be for approximate multiple parameters for processing dimension error corresponding with limited machine direction
Data be applicable in least square method and it is calculated, can also be determined by operator and via data input/output device 120 directly
Input.Just the data of processing dimension error corresponding with limited machine direction are used using method as least square method
For to have used the function of multiple parameters approximately calculate, it can be executed by Working control device 111 or 112,
It can also be executed in the external of wire electric discharge machine 100.Specifically, can be by being received via data input/output device 120
The side clearance instruction device 46 of the data of processing dimension error is executed parameter fitting and is determined using method as least square method
Determine multiple parameters, can also be via data input/output device 120 and side clearance instruction device 46 is received by external computer
The multiple parameters determined.
Side clearance instruction device 46 is based on the obtained above-mentioned e (θ) according to the multiple parameters and approximate function determined
Such processing dimension error relative to machine direction θ, finds out side clearance corresponding with machine direction θ corrected value, opposite side
Face gapping instruction value is corrected.Side clearance corrected value is based on the processing dimension found out according to multiple parameters and approximate function
The approximation of error, being calculated as processing dimension error and machine direction independently becomes steady state value, therefore also can be used
It is worth obtained from the label of e (θ) capable of being inverted and processing dimension error is made to become 0.
The wire electric discharge machine 100 being related to according to embodiment 4 is obtaining the basis of effect identical with embodiment 3
On, as long as the quantity for being used for approximate multiple parameters to be set as to the number of the data than processing dimension error corresponding with machine direction
Amount is few, can obtain for storing effect as the saving to the storage region of memory 202 or storage device 203
Fruit.
Structure shown in above embodiment shows an example of the contents of the present invention, also can with other well-known techniques into
Row combination, can also omit, change a part of structure in the range for not departing from purport of the invention.
The explanation of label
1 top wire guiding nipple, 2 lower part wire guiding nipples, 3 spools, 4 supply rollers, 5 lower rollers, 6 recycling rolls, the driving of 7 X-axis
Device, 8 Y-axis driving devices, 9 workbench, 13 machined objects, 20 drive dynamic control devices, 30 line electrodes, the power supply of 31 tops
Part, 32 lower parts power part, 33 top pushing blocks, 34 lower part pushing blocks, 35 processing power sources, and 40 interpolars are averaged machining voltage
Test section, 41 interpolars are averaged machining voltage correction unit, 42 voltage operational portions, 43 process velocity control units, 44 target voltages
Storage unit, 45 side clearance estimators, 46 side clearance instruction devices, 47 side clearance controllers, the correction of 48 target voltages
Portion, 49 subtracters, 50 points, 51 distances, 100 wire electric discharge machines, 111,112 Working control devices, the input of 120 data
Output device, 201 CPU, 202 memories, 203 storage devices, 204 display devices, 205 input units.
Claims (7)
1. a kind of wire electric discharge machine occurs electric discharge between machined object and line electrode and adds to the machined object
Work,
The wire electric discharge machine is characterized in that, comprising:
Drive dynamic control device controls the relative distance of the line electrode and the machined object；
Interpolar is averaged machining voltage test section, is averaged machining voltage to the interpolar between the line electrode and the machined object
It is detected；
Process velocity control unit is averaged machining voltage and preset target voltage, to the driving based on the interpolar
Control device is controlled；And
Voltage correction portion is averaged machining voltage or institute to the interpolar based on the machining information and machine direction in processing
Any one for stating target voltage is corrected so that independently make with machine direction the line electrode and the machined object it
Between side clearance become it is constant.
2. wire electric discharge machine according to claim 1, which is characterized in that
The voltage correction portion includes
Side clearance estimator is based on the machining information, calculates the side-play presumed value；
Side clearance instruction device finds out side clearance corresponding with machine direction instruction value；And
Side clearance controller finds out corrected value in a manner of making the presumed value follow the side clearance instruction value,
The process velocity control unit controls the drive dynamic control device, carries out to make it with the corrected value
The interpolar of correction be averaged machining voltage and preset target voltage voltage absolute value of the difference reduction process velocity,
Or the drive dynamic control device is controlled, to make it the target voltage corrected with the corrected value
Be averaged the process velocity of the voltage absolute value of the difference reduction of machining voltage with the interpolar.
3. wire electric discharge machine according to claim 2, which is characterized in that
The side clearance instruction device, according to the correction of the side clearance of the data of the processing dimension error dependent on machine direction
Value is corrected the side clearance instruction value before correction, thus finds out the side clearance instruction corresponding with machine direction
Value.
4. wire electric discharge machine according to claim 3, which is characterized in that
The side clearance instruction device executes interpolation to the data of the processing dimension error and calculates, and finds out the side clearance school
Positive value.
5. wire electric discharge machine according to claim 3, which is characterized in that
It is approximate that the side clearance instruction device has used the data of the processing dimension error function of multiple parameters to carry out,
Based on the approximation of the processing dimension error found out according to the multiple parameter and the function, the side clearance is found out
Corrected value.
6. wire electric discharge machine according to any one of claim 1 to 5, which is characterized in that
The machining information is that the interpolar is averaged machining voltage and the process velocity.
7. a kind of wire electric discharge machining method, is the wire electric discharge machining method of wire electric discharge machine, which has
To the drive dynamic control device that the relative distance of line electrode and machined object is controlled, in the machined object and the line electrode
Between occur electric discharge and the machined object is processed,
The wire electric discharge machining method is characterized in that thering is following step:
To the interpolar between the line electrode and the machined object be averaged machining voltage detect the step of；
It is averaged machining voltage and preset target voltage based on the interpolar, the drive dynamic control device is controlled
Step；And
Based on the machining information and machine direction in processing, machining voltage is averaged to the interpolar or the target voltage is appointed
Meaning person is corrected so that independently make with machine direction side clearance between the line electrode and the machined object at
For constant step.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/014809 WO2018189806A1 (en) | 2017-04-11 | 2017-04-11 | Wire electric discharge machining apparatus and wire electric discharge machining method |
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| Publication Number | Publication Date |
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| CN109041572A true CN109041572A (en) | 2018-12-18 |
| CN109041572B CN109041572B (en) | 2020-04-07 |
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| Country | Link |
|---|---|
| JP (1) | JP6266192B1 (en) |
| CN (1) | CN109041572B (en) |
| DE (1) | DE112017000086B4 (en) |
| WO (1) | WO2018189806A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116348232A (en) * | 2021-03-03 | 2023-06-27 | 三菱电机株式会社 | Wire electric discharge machining apparatus, shape and size compensator, wire electric discharge machining method, learning apparatus, and estimation apparatus |
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| JPS5794401A (en) | 1980-12-01 | 1982-06-11 | Sumitomo Metal Ind Ltd | Rolling method for large diameter round steel billet |
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2017
- 2017-04-11 DE DE112017000086.6T patent/DE112017000086B4/en active Active
- 2017-04-11 CN CN201780003444.2A patent/CN109041572B/en active Active
- 2017-04-11 WO PCT/JP2017/014809 patent/WO2018189806A1/en active Application Filing
- 2017-04-11 JP JP2017554924A patent/JP6266192B1/en active Active
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| JPS63105829A (en) * | 1986-10-24 | 1988-05-11 | Mitsubishi Electric Corp | Wire cut electric discharge machine |
| CN1268912A (en) * | 1998-05-13 | 2000-10-04 | 三菱电机株式会社 | Numeric control apparatus for wire electric spark machine |
| JP2008036720A (en) * | 2006-08-01 | 2008-02-21 | Fanuc Ltd | Wire electric discharge machine |
| CN102078990A (en) * | 2009-11-26 | 2011-06-01 | 发那科株式会社 | Wire-cut electric discharge machine and electric discharge machining method |
| CN104039491A (en) * | 2012-01-11 | 2014-09-10 | 三菱电机株式会社 | Wire electrical discharge machining device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116348232A (en) * | 2021-03-03 | 2023-06-27 | 三菱电机株式会社 | Wire electric discharge machining apparatus, shape and size compensator, wire electric discharge machining method, learning apparatus, and estimation apparatus |
| CN116348232B (en) * | 2021-03-03 | 2024-02-02 | 三菱电机株式会社 | Wire electric discharge machining apparatus, shape and size compensator, wire electric discharge machining method, learning apparatus, and estimation apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112017000086B4 (en) | 2019-07-11 |
| CN109041572B (en) | 2020-04-07 |
| DE112017000086T5 (en) | 2019-01-24 |
| JPWO2018189806A1 (en) | 2019-04-18 |
| WO2018189806A1 (en) | 2018-10-18 |
| JP6266192B1 (en) | 2018-01-24 |
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