CN101462188A - Spark coil cutting processor with deformation compensating mechanism - Google Patents
Spark coil cutting processor with deformation compensating mechanism Download PDFInfo
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- CN101462188A CN101462188A CNA2007103018420A CN200710301842A CN101462188A CN 101462188 A CN101462188 A CN 101462188A CN A2007103018420 A CNA2007103018420 A CN A2007103018420A CN 200710301842 A CN200710301842 A CN 200710301842A CN 101462188 A CN101462188 A CN 101462188A
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- coil cutting
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Abstract
The invention discloses an electric spark wire cutting machine provided with a deformation compensating device, which comprises a movable extension arm, a measuring unit which is arranged on the extension arm to measure the deformation amount of the extension arm, and a control unit which is connected with the measuring unit by electricity and control the movement of the extension arm, wherein the control unit is stored with a comparison table of the deformation amount of the extension arm and the value of the positional error, so feedback displacement control can be carried out on the extension arm according to the deformation amount of the extension arm.
Description
Technical field
The present invention relates to a kind of spark coil cutting processor, especially the spark coil cutting processor that foil gauge (Strain Gauge) carries out the cutting path compensation is set on semi-girder about a kind of the utilization with deformation compensating mechanism.
Background technology
The precise treatment of product and the automation of function have become the development trend of following instrument class machinery; At Ultraprecision Machining market, its applied produce market is grown up year by year, following ultraprecise mould or parts processing for the mobile 3C Product of individual, photoelectric communication, biomedical parts certainly will have tight demand, so ultraprecise processing market future is greatly good; Yet when the machining accuracy demand of product enters into the ultraprecise grade, the design of Related product will be pind down by precision machined manufacturing capacity, if will make high-precision product, must integrate the kinds of processes mode, and cost significantly becomes we to be achieved.
Wire-cut Electrical Discharge Machining (WEDM, Wire Electrical Discharge Machining) be one of non-traditional processing mode, its process principle cuts for the line electrode by conduction, apply voltage and cause the spark discharge phenomenon under very close situation at electrically conductive workpiece and line electrode, the high heat fusing machining object when utilizing this phenomenon to take place is to reach the purpose of machining; Therefore, Wire-cut Electrical Discharge Machining provides and realizes that the ultrahigh hardness material carries out precision machined excellent selection.
Along with the development of industry, the market of spark coil cutting processor also enlarges gradually, makes the integral production amount rise thereupon, and in the process of lathe production the problem of normal generation be lathe and produce stability problem in batches.This problem is derived from each lathe and makes to the process of final assembly very complicated from foundry goods making, parts, whole process of production can be passed through multiprogramming, also need a large amount of human inputs wherein, therefore be easy to occur in process of production flaw, and then cause final lathe accuracy different with expectation.Spark coil cutting processor adds at first cutter need carry out high-pressure flush smooth and easy in order to deslagging man-hour, but the pressure of bath is up to 20kg/cm
2And directly impose on up and down head, this at present semi-girder therefore be easy to sagging phenomenon occur because comparatively tiny and far away apart from fulcrum, cause the position of head end points down the phenomenon of skew to occur.Wire-cut Electrical Discharge Machining adopts the line electrode cutting of discharging, controller is when calculating the machining path of line electrode, earlier with the end points line of head up and down as the line electrode attitude in the space at present, carry out the path compensation correction according to the line electrode radius that uses again.If the work in-process position of head up and down is offset because of deformation, then the path of line electrode walking will be caused the inaccurate problem of machining accuracy with expecting different.At present existing processing mode for this problem is for strengthening semi-girder rugosity down to promote rigidity and to reduce the degree of deformation, this method only can reduce the generation of deformation problems, and can't carry out instant on-the-spot distortion measurement, and then compensate the path offset that modifying factor deformation is caused along with bath pressure, environment temperature, boom reach.
Spark coil cutting processor commonly used, its semi-girder structure has following shortcoming:
(1) can make head bear great pressure during high-pressure flush, the moment that is produced will make semi-girder produce deformation: generally when carrying out High-speed machining for guaranteeing that deslagging is good, need carry out high-pressure flush in order to deslagging to workpiece, and the position of bath is to be served as by the jet flow mechanism in the head (as head 10 and the head 12 of Fig. 1) up and down.Head bears a great reaction force about can making during high-pressure flush, and this pressure can reach 20kg/cm
2, add the moment that the fulcrum and the arm of force produce and to make semi-girder produce deformation.Especially descend semi-girder (as the semi-girder 14 of Fig. 1) because of the distance of head and fulcrum is far away, and the sectional area of semi-girder is less, therefore the deformation that is produced is even more serious.
(2) different flushing pressure, semi-girder material and length all can influence deformation quantity: the deformation of semi-girder mainly is because semi-girder is subjected to the influence of moment (head application of force x arm of force length) deformation to take place up and down, therefore different bath pressure is also different with the moment of its generation of arm of force length, and therefore the deformation quantity that is caused is also different.In addition, the semi-girder material is for influencing one of principal element of material stiffness, and strong more its deformation quantity when being subjected to identical external force of material rigidity is less relatively.
(3) can't learn the deformation quantity of present semi-girder, also can't carry out field of line compensation correction at this problem: spark coil cutting processor there is no any detecting mode and can be monitored at the deformation of semi-girder at present, therefore can't confirm the size of deformation quantity or compensates and corrects.
Therefore, the present inventor works out a kind of spark coil cutting processor with deformation compensating mechanism, and it can improve in the known technology because bath pressure causes the shortcoming of cutting path skew.
Summary of the invention
Main purpose of the present invention is for providing a kind of spark coil cutting processor with deformation compensating mechanism, utilizes foil gauge to carry out the distortion measurement of semi-girder and FEEDBACK CONTROL according to this, and then reaches the purpose of cutting path compensation.
For achieving the above object, the invention provides a kind of spark coil cutting processor, comprise with deformation compensating mechanism:
One semi-girder movably;
One measuring unit is installed on this semi-girder to measure the deformation quantity of this semi-girder; And
One control module is electrically connected and controls moving of this semi-girder with this measuring unit;
Wherein, this control module stores the table of comparisons of a semi-girder deformation quantity and site error value, so can feed back displacement control to this semi-girder according to the deformation quantity of this semi-girder.
For achieving the above object, the present invention more provides a kind of spark coil cutting processor semi-girder deformation compensation method, comprises step:
(a) provide a spark coil cutting processor, have semi-girder movably, be installed on this semi-girder measuring the measuring unit of deformation quantity, and be electrically connected and control the control module that this semi-girder moves with this measuring unit;
(b) this measuring unit is measured the deformation quantity that this semi-girder produced and is produced a signal when operation;
(c) this control module receives this signal and tries to achieve the site error value of this semi-girder according to the table of comparisons of semi-girder deformation quantity that stores and site error value; And
(d) this control module feeds back displacement control according to this site error value to this semi-girder.
Beneficial effect of the present invention is, provided by the invention have the spark coil cutting processor of deformation compensating mechanism by semi-girder being fed back displacement control, can carry out on-the-spot displacement revisal to the semi-girder of deformation, make head can get back on the former cutting path, therefore the precision in the time of can improving cutting is guaranteed machining accuracy.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the schematic diagram of known spark coil cutting processor;
Fig. 2 is the schematic diagram of spark coil cutting processor of the present invention;
Fig. 3 A is the schematic diagram of semi-girder under normal condition of spark coil cutting processor;
Fig. 3 B is the schematic diagram of semi-girder under deformed state of spark coil cutting processor;
Fig. 4 is the schematic diagram of head path deviation;
Fig. 5 A is the element connection diagram of spark coil cutting processor of the present invention;
Fig. 5 B is the element connection diagram of spark coil cutting processor of the present invention, and it is shown as another embodiment;
Fig. 6 is the circuit diagram of accurate impedance variations converter amplifier circuit used in the present invention;
Fig. 7 is the making flow chart of the semi-girder deformation quantity used in the present invention and the site error table of comparisons; And
Fig. 8 is the flow chart of semi-girder deformation compensation method used in the present invention.
Wherein, Reference numeral
The 2-spark coil cutting processor
The 10-head
The 12-head
The 14-semi-girder
The 20-head
The 22-head
The last semi-girder of 24-
Semi-girder under the 26-
The 50-microprocessor
The 52-semi-girder
The 54-foil gauge
56-impedance variations converter amplifier circuit
The 58-memory
The 200-foil gauge
The 202-foil gauge
The 204-foil gauge
The table of comparisons of 580-semi-girder deformation quantity and site error value
600-computing district
The specific embodiment
For making purpose of the present invention, structure, feature and function thereof are had further understanding, with reference to the accompanying drawings and cooperate embodiment to be described in detail as follows, but the following drawings and embodiment are aid illustration only, and the present invention is not limited to drawings and Examples.
Fig. 2 has the schematic diagram of the spark coil cutting processor of deformation compensating mechanism for the present invention, spark coil cutting processor with deformation compensating mechanism 2 of the present invention mainly cuts with 22 pairs of materials and parts of head on the following semi-girder 26 by the head of being located on the semi-girder 24 20, and semi-girder 24 and following semi-girder 26 can move freely on this.
Before cutting as yet, this head 20 and head 22 can apply voltage and cause spark discharge and utilize its high heat fusing materials and parts to reach the purpose of machining toward each other between line electrode between two heads and workpiece; Yet when cutting, for making deslagging smooth, so up and down head 20 with 22 can spray powerful water column (not shown) carries out deslagging on every side, so can make that semi-girder 24 and 26 is subjected to a powerful reaction force and deformation (seeing also Fig. 3 A and Fig. 3 B) up and down, and semi-girder 24 and 26 deformation meeting make head 20 and 22 correspondingly produce skew up and down, so make the cutting path of materials and parts produce error, the accuracy when causing the materials and parts cutting descends.
Fig. 4 is the simplified diagram of above-mentioned head path deviation, wherein originally corresponding head 20 up and down and 22 is because semi-girder deformation makes the position produce skew, therefore not only on directions X, produce offset deviation a, more on the Y direction, produce offset deviation b and offset deviation c respectively, so make cutting accuracy descend.
For improving the problems referred to above, as shown in Figure 2, be provided with a plurality of foil gauges (Strain Gauge) 200,202 and 204 on the semi-girder 26 down in the present embodiment, the foil gauge 200,202 and 204 that can affect the top to attach when deformation takes place semi-girder 26 instantly makes it to produce deformation, foil gauge 200,202 and 204 deformation will influence the resistive of itself, then utilize an impedance variations converter amplifier circuit (as shown in Figure 6) to convert resistance variations to voltage change again.In an embodiment of the present invention, only on the semi-girder 22 foil gauge 200,202 and 204 is being set down; Yet the present invention can be simultaneously be provided with foil gauge on semi-girder up and down carries out distortion measurement, and this type of application change is looked user's demand and adopted, and does not repeat them here.
In addition, the present invention more is provided with a microprocessor 50 in spark coil cutting processor, shown in the element annexation schematic diagram of Fig. 5 A.Wherein foil gauge 54 is earlier with after an impedance variations converter amplifier circuit 56 is electrically connected, be connected to this microprocessor 50 again, this microprocessor 50 is electrically connected moving with control semi-girder 52 again with semi-girder 52, this microprocessor 50 more is electrically connected with a memory 58 in addition, 58 of this memories store the table of comparisons 580 (its producing method will be stated as the back) of a semi-girder deformation quantity and site error value, so can feed back displacement control to this semi-girder according to the deformation quantity of this semi-girder.
Certainly, this use element of the present invention also can have other variations, shown in Fig. 5 B, meaning i.e. this semi-girder 52 is electrically connected with microprocessor 50 and foil gauge 54 respectively, this microprocessor 50 also is electrically connected mutually with foil gauge 54, and wherein this microprocessor 50 directly is provided with impedance variations converter amplifier circuit 56 and stores the table of comparisons 580 of this semi-girder deformation quantity and site error value.
Fig. 6 is the circuit diagram of employed accurate impedance variations converter amplifier circuit among the present invention.Relevant operation part (as the computing district 600 among Fig. 6) is made up of multiple element circuitry in the accurate impedance variations converter amplifier circuit, can compensate at each interelement variation, temperature drift, can finish simultaneously and suppress noise and the function that realizes impedance matching, its allomeric function is equal to precision operational-amplifier.
The foil gauge deformation that when semi-girder generation deformation, can cause the top to attach simultaneously, this moment, variation appearred in the impedance meeting of foil gauge itself, the variation of this impedance will make after by accurate impedance variations converter amplifier circuit output voltage with change.
Please refer to Fig. 7, this figure is the semi-girder deformation quantity among the present invention and the making flow chart of the site error table of comparisons, wherein:
Step 71-at first bestows a strength to the semi-girder of spark coil cutting processor, makes semi-girder produce deformation, and this head can be along with producing a location variation;
Step 72-is when semi-girder deformation, and this foil gauge can change according to the corresponding output voltage that produces of this deformation quantity;
Step 73-with this head location variation and this output voltage variable quantity record after, repeating step 71; And
Step 74-forms the multi-group data that obtains the table of comparisons of semi-girder deformation quantity and site error value.
Please refer to Fig. 8 again, this figure is the flow chart of semi-girder deformation compensation method of the present invention, wherein comprises:
This foil gauge of step 81-is measured the deformation quantity that this semi-girder produced and is produced a voltage variety when operation;
After this microprocessor of step 82-receives this voltage variety, from the semi-girder deformation quantity and the site error value table of comparisons, try to achieve the site error value of semi-girder according to voltage variety; And
This microprocessor of step 83-feeds back displacement control according to the site error value to semi-girder.
So, the present invention has the spark coil cutting processor of deformation compensating mechanism owing to can feed back displacement control to semi-girder, so the semi-girder because of the deformation of water column impact reactive force can be carried out the displacement revisal, make head can get back on the former cutting path, therefore the precision in the time of can improving cutting guarantees that machining accuracy can not reduce because of semi-girder deformation.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (14)
1. the spark coil cutting processor with deformation compensating mechanism is characterized in that, comprises:
One semi-girder movably;
One measuring unit is installed on this semi-girder to measure the deformation quantity of this semi-girder; And
One control module is electrically connected and controls moving of this semi-girder with this measuring unit;
Wherein, this control module is electrically connected with the mnemon of the table of comparisons of site error value with storing a semi-girder deformation quantity, so can feed back displacement control to this semi-girder according to the deformation quantity of this semi-girder.
2. the spark coil cutting processor with deformation compensating mechanism according to claim 1 is characterized in that this measuring unit comprises at least one foil gauge.
3. the spark coil cutting processor with deformation compensating mechanism according to claim 2 is characterized in that, this measuring unit more comprises an impedance variations converter amplifier circuit.
4. the spark coil cutting processor with deformation compensating mechanism according to claim 2 is characterized in that, this control module more comprises an impedance variations converter amplifier circuit.
5. a spark coil cutting processor semi-girder deformation compensation method is characterized in that, comprises step:
(a) provide a spark coil cutting processor, it has semi-girder movably, be installed on this semi-girder measuring the measuring unit of deformation quantity, and is electrically connected and controls the control module that this semi-girder moves with this measuring unit;
(b) this measuring unit is measured the deformation quantity that this semi-girder produced and is produced a signal when operation;
(c) this control module receives this signal and tries to achieve the site error value of this semi-girder according to the table of comparisons of semi-girder deformation quantity that stores and site error value; And
(d) this control module feeds back displacement control according to this site error value to this semi-girder.
6. spark coil cutting processor semi-girder deformation compensation method according to claim 5 is characterized in that this measuring unit comprises at least one foil gauge.
7. spark coil cutting processor semi-girder deformation compensation method according to claim 6 is characterized in that this measuring unit more comprises an impedance variations converter amplifier circuit.
8. spark coil cutting processor semi-girder deformation compensation method according to claim 6 is characterized in that this control module more comprises an impedance variations converter amplifier circuit.
9. according to claim 7 or 8 described spark coil cutting processor semi-girder deformation compensation methodes, it is characterized in that, this foil gauge produces impedance variations when deformation, this impedance variations converter amplifier circuit transfers this impedance variations to output voltage to be changed, and this control module receives the site error value that this output voltage changes and try to achieve according to the table of comparisons this semi-girder.
10. spark coil cutting processor semi-girder deformation compensation method according to claim 5 is characterized in that the table of comparisons of this semi-girder deformation quantity and site error is made according to the following step:
(a1) this semi-girder being bestowed different strength makes it produce several deformation and record position error amount;
(a2) this measuring unit is according to corresponding several signals that produce of these several deformation; And
(a3) this control module writes down this site error value and the table of comparisons of corresponding signal with formation semi-girder deformation quantity and site error value.
11. spark coil cutting processor semi-girder deformation compensation method according to claim 10 is characterized in that this measuring unit comprises at least one foil gauge.
12. spark coil cutting processor semi-girder deformation compensation method according to claim 11 is characterized in that this measuring unit more comprises an impedance variations converter amplifier circuit.
13. spark coil cutting processor semi-girder deformation compensation method according to claim 11 is characterized in that this control module more comprises an impedance variations converter amplifier circuit.
14. according to claim 12 or 13 described spark coil cutting processor semi-girder deformation compensation methodes, it is characterized in that, this foil gauge produces impedance variations when deformation, this impedance variations converter amplifier circuit transfers this impedance variations to output voltage to be changed, and this control module receives the site error value that this output voltage changes and try to achieve according to the table of comparisons this semi-girder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103018420A CN101462188B (en) | 2007-12-18 | 2007-12-18 | Spark coil cutting processor with deformation compensating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007103018420A CN101462188B (en) | 2007-12-18 | 2007-12-18 | Spark coil cutting processor with deformation compensating mechanism |
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| CN101462188A true CN101462188A (en) | 2009-06-24 |
| CN101462188B CN101462188B (en) | 2011-04-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106112153A (en) * | 2016-07-26 | 2016-11-16 | 苏州科技大学 | Nc wire-cutting molybdenum filament vertical survey bearing calibration and device |
| CN109794932A (en) * | 2017-11-16 | 2019-05-24 | 财团法人工业技术研究院 | Mechanical arm system of processing and its processing method |
| US10967510B2 (en) | 2017-11-16 | 2021-04-06 | Industrial Technology Research Institute | Robot arm processing system and method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5766755B2 (en) | 2013-08-16 | 2015-08-19 | ファナック株式会社 | In a wire electric discharge machine, a method for correcting the rotation touch of a rotary tool attached to a rotary shaft, and a wire electric discharge machine having a correction function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08155741A (en) * | 1994-12-06 | 1996-06-18 | Fanuc Ltd | Wire electric discharge machining machine |
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2007
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106112153A (en) * | 2016-07-26 | 2016-11-16 | 苏州科技大学 | Nc wire-cutting molybdenum filament vertical survey bearing calibration and device |
| CN106112153B (en) * | 2016-07-26 | 2018-03-23 | 苏州科技大学 | Nc wire-cutting molybdenum filament vertical survey bearing calibration and device |
| CN109794932A (en) * | 2017-11-16 | 2019-05-24 | 财团法人工业技术研究院 | Mechanical arm system of processing and its processing method |
| US10967510B2 (en) | 2017-11-16 | 2021-04-06 | Industrial Technology Research Institute | Robot arm processing system and method thereof |
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| Publication number | Publication date |
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| CN101462188B (en) | 2011-04-13 |
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