CN103752962B - For the reciprocal gradual self adaptation feed control method of electric spark machine tool - Google Patents
For the reciprocal gradual self adaptation feed control method of electric spark machine tool Download PDFInfo
- Publication number
- CN103752962B CN103752962B CN201310675205.5A CN201310675205A CN103752962B CN 103752962 B CN103752962 B CN 103752962B CN 201310675205 A CN201310675205 A CN 201310675205A CN 103752962 B CN103752962 B CN 103752962B
- Authority
- CN
- China
- Prior art keywords
- motion
- workpiece
- reciprocal
- electrode
- progressive
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000010892 electric spark Methods 0.000 title claims abstract description 31
- 230000006978 adaptation Effects 0.000 title claims abstract description 16
- 230000033001 locomotion Effects 0.000 claims abstract description 176
- 230000000750 progressive effect Effects 0.000 claims abstract description 83
- 230000010354 integration Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims description 26
- 230000008859 change Effects 0.000 claims description 12
- 238000002679 ablation Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 abstract description 8
- 239000004065 semiconductor Substances 0.000 abstract description 6
- 239000007769 metal material Substances 0.000 abstract description 4
- 230000001133 acceleration Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 17
- 238000009760 electrical discharge machining Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000012224 working solution Substances 0.000 description 5
- 238000012913 prioritisation Methods 0.000 description 4
- 238000009763 wire-cut EDM Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052732 germanium Inorganic materials 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 241000145637 Lepturus Species 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention discloses a kind of reciprocal gradual self adaptation feed control method for electric spark machine tool, by moving back and forth and the mode of progressive motion integration or the mode that is separated with progressive motion of reciprocating motion and control tool-electrode in electric spark machine tool and workpiece producing reciprocal gradual feed motion, realize the high efficiency high-quality spark machined of difficult-to-machine material especially semi-conducting material and metal material.The present invention makes automatically to obtain between workpiece and tool-electrode a suitable discharging gap, facilitate normal spark discharge, what guarantee was processed continues to carry out, beneficial effects such as having acceleration chip removal and cooling, prevent electrode from burning, improve machined surface quality, improve working (machining) efficiency, be applied widely.
Description
Technical field
The present invention relates to a kind of feed control method for electric spark machine tool, belong to Numeric Control Technology and electric machining equips field.
Background technology
Spark machined is a kind of special process method utilizing the galvanic action of the electric spark that pulsed discharge produces between electrode material to be carried out to ablation processing, also known as electric discharge processing or galvanic corrosion processing.
Carry out electrical spark working man-hour, tool-electrode and machined material (i.e. workpiece) connect the two poles of the earth of the pulse power respectively, by gap automatic controlling system tool-electrode to workpiece feeding, when two interelectrode gaps reach certain distance, working solution between electrode punctures by the pulse voltage that two electrodes apply, and produces spark discharge.Localized hyperthermia's high pressure that spark discharge produces makes the fusing of the minor material near point of discharge even gasify, and explosion type ground outwards splashes, and takes away after being then condensed into rapidly solia particle by working solution.At this moment next small pit is just stayed on the surface of the workpiece.Suspend a moment to recover to apply pulse voltage again after state of insulation until working solution, at this moment will produce new electric spark in the position that two electrodes are relatively close.Although the material of each pulsed discharge ablation is few, if constantly repeat said process, the material that just energy ablation is more with the frequency of thousands of subpulse electric discharge per second, realize the materials processing with certain productivity ratio.
According to tool-electrode form and and workpiece between the feature of relative motion, spark machined can be divided into substantially: the types such as the processing of sinking EDM, Wire-cut Electrical Discharge Machining, EDM Grinding, electric spark generate, nonmetal spark machined and electric spark surface peening.Wherein most widely used is sinking EDM and Wire-cut Electrical Discharge Machining.Sinking EDM does feed motion by forming tool electrode relative to workpiece, thus copy on workpiece by the shape and size of tool-electrode, and it comprises electric spark pocket machining and perforation processing two kinds.Wire-cut Electrical Discharge Machining utilizes the wire moved axially to make tool-electrode, with the relative movement track of workpiece, work piece cut become predetermined shape by control electrode silk.High speed travelling wire and low-speed wire cutting Linear cut two kinds is divided into by the velocity magnitude of wire electrode movement.
No matter any form processing, according to the general principle of spark machined, making tool-electrode and workpiece in process, keep the gap of a suitable size to be ensure that electric spark produces and the primary condition of processing and continuing to carry out of discharging, is also the key problem in technology obtaining maximum cutting rate and optimum surface quality in edm process.But, due to this gap very small (being generally 0.1 ~ 0.01mm), add that the processed position of workpiece is immersed in muddy working solution usually, and along with workpiece material is constantly by ablation, the position in gap is constantly changing, and therefore the size of direct-on-line detector gap almost cannot realize.For this reason, existing electric spark machine tool feed control system is the size indirectly being estimated discharging gap by the discharge condition of detection edm process, thus realizes the automatic adjustment of feed speed.When utilizing electric discharge machining method processing metallic, this gap voltage corresponding to three kinds of states of unloaded, regular picture and short circuit and electric current have obviously Discharge pulse waveform feature.Traditional electric spark machine tool feed control system just can determine discharge condition and then the proportionate relationship adjustment feed speed according to different conditions easily by the identification of these features.
Man-hour is added when application said method carries out the semi-conducting material such as silicon, germanium, because semi-conducting material has the electrology characteristic totally different with metal material, as there is larger contact barrier and higher resistivity when entering electricity, discharge lag has randomness etc., gap voltage and the electric current of regular picture state and short-circuit condition are more or less the same, even if wire electrode with silicon materials close contact, voltage across poles amplitude also can not be down to zero immediately, now still can regular picture processing.So just cause traditional feed control method to be difficult to distinguish regular picture state and short-circuit condition, thus cause feed control system entirely ineffective, occur owing feeding or the bending even fracture of wire phenomenon of wire electrode.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of reciprocal gradual self adaptation feed control method for electric spark machine tool, has avoided discharging gap size be difficult to detect and regular picture state and short-circuit condition are difficult to the difficult problem distinguished by the reciprocal progressive motion pattern of " forward-backward-readvance ".The present invention was both applicable to metal material processing, was applicable to again the spark machined of the semi-conducting material such as silicon, germanium, and had reduction commutation line, acceleration chip removal, advantage such as raising crudy and working (machining) efficiency etc.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of reciprocal gradual self adaptation feed control method for electric spark machine tool, produce reciprocal gradual feed motion by control tool electrode and workpiece to realize self adaptation feeding and control, short-circuit condition is utilized always to occur in rule after regular picture state, progressive motion is performed at Light Condition, and progressive motion is stopped after recognizing regular picture state, avoid spark discharge to process and be absorbed in short-circuit condition, utilize the motion of the rollback in moving back and forth to strengthen the gap of tool-electrode and workpiece simultaneously, accelerate chip removal, improve discharging condition; Described reciprocal gradual feed motion is the motion mode of reciprocating motion and progressive motion integration, or moves back and forth the motion mode be separated with progressive motion; Described reciprocating motion refer to tool-electrode relative to workpiece on given feed-paths with the motor pattern of forward-backward-readvance constantly forward-reverse repeatedly; Described progressive motion refers to reciprocating while, and reciprocating center is pushed ahead gradually along given feed-paths.
As further prioritization scheme of the present invention, the motion mode of described reciprocating motion and progressive motion integration, comprises the following steps:
Step 1, sets the initial parameter of reciprocal progressive motion at Light Condition;
Step 2, control tool electrode or workpiece with certain speed to march forward along given moving line from current location to, identify whether to enter regular picture state by the constantly gap voltage of testing tool electrode and workpiece and the change of electric current in feed motion process;
Step 3, after identifying and entering regular picture state, feed-disabling moves, and record current location also stops certain hour in current location; Described stop certain hour selects according to the size of the response speed of kinetic control system and the electric spark of generation;
Step 4, along former feed-paths fast fallback, judges whether to enter Light Condition by testing tool electrode and the gap voltage of workpiece and the change of electric current in rollback motion process;
Step 5, after identifying and entering Light Condition, stop rollback motion, the position that fast feed to step 3 records, then returns step 2;
Step 6, repeats step 2-step 5, so constantly carries out the reciprocal progressive motion of forward-backward-readvance, until spark machined terminates.
As further prioritization scheme of the present invention, the motion mode that described reciprocating motion is separated with progressive motion, comprises the following steps:
Step 1, sets the initial parameter of reciprocal progressive motion at Light Condition;
Step 2, a maintenance in tool-electrode and workpiece is static, and another is that reciprocal center ceaselessly moves back and forth with certain amplitude and frequency along given moving line with current location; Described certain amplitude and frequency determine according to the size in the response speed of kinetic control system, the size of tool-electrode and spark discharge gap;
Step 3, make in reciprocal center or step 2 keep static workpiece or tool-electrode progressive forward with certain speed along given moving line, in feed motion process, checked whether situation Light Condition and regular picture state occurring and alternately occurs by the constantly gap voltage of testing tool electrode and workpiece and the change of electric current;
Step 4, progressive when stopping after the situation that generation Light Condition and regular picture state alternately occur, and the change of the gap voltage and electric current that continue through testing tool electrode and workpiece in current location checks whether the situation being still in Light Condition and regular picture state and alternately occurring, if then keep halted state, then return step 3 if not;
Step 5, repeats step 3-step 4, so constantly carries out advancing-stopping-progressive motion that readvancing, ceaselessly performs the reciprocating motion of step 2, until spark machined terminates simultaneously.
As further prioritization scheme of the present invention, described given moving line comprises straight line and curve two kinds of situations.
As further prioritization scheme of the present invention, described certain speed before workpiece is not by spark machined according to process workpiece material spark machined experience determine, the predicted value of the actual ablation speed obtained according to on-line measurement after workpiece is by spark machined is determined.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
(1) the present invention is without the need to detecting short-circuit condition, also without the need to detecting the size of discharging gap with regard to ensureing that processing is carried out smoothly, fundamentally prevents the generation of feeding and deficient feeding.The current thickness of the present invention and workpiece, ablation rate, material behavior have nothing to do, can realize machining gap from motion tracking and maintenance, be a kind of self-adaptation control method;
(2) setback in feeding process can strengthen the gap of workpiece and electrode, the chip of ablation can unimpededly be discharged, be conducive to the renewal of working solution and the washing of surface to be machined, accelerate the cooling of workpiece and tool-electrode, prevent electrode surface from being burnt, avoid sacrificing process velocity to go to get rid of carbon slag, thus improve crudy, improve working (machining) efficiency;
(3) from servo-controlled angle, relative to not having for reciprocating slow feeding, because motion amplitude and speed are comparatively large, the incidental vibration of thin tail sheep low speed feeding and low speed jerking motion phenomenon can be overcome, thus raising control accuracy;
(4) move back and forth and make the every bit on machined material produce repeatedly spark discharge, thus make electric discharge pit become shallow little and even, raising machined surface quality.For high speed to-and-fro thread feed electric spark linear cutter, the processing differences superposition also homogenising that reciprocal gradual feeding also makes surface of the work produce because of wire electrode commutation, thus weaken the commutation line of surface of the work significantly;
(5) the small electric spark produced in the both sides of wire electrode cutting route in reciprocatory movement can make joint-cutting become more smooth, reduces surface roughness, makes feeding more unobstructed, reduces the resistance of motion, reduces wire broken rate;
(6) the present invention has stronger adaptive adjustment capability to complex working condition, and can solve traditional spark machined feed control method cannot the problem of effective processing semiconductor material.Both be applicable to metal material processing, be applicable to again the spark machined of the semi-conducting material such as silicon, germanium, applied widely.
Accompanying drawing explanation
Fig. 1 is reciprocal asymptotic expression feed motion mode and self adaptation feeding schematic diagram; Wherein, (a) is the movement locus schematic diagram of reciprocal asymptotic expression feed motion mode and self adaptation feeding, and (b) is setback schematic diagram in (a), and (c) is the schematic diagram of forward travel in (a).
Fig. 2 is the flow chart of the motion mode of reciprocating motion and progressive motion integration.
Fig. 3 is the flow chart moving back and forth the motion mode be separated with progressive motion.
Fig. 4 moves back and forth and the motion mode of progressive motion integration is linearly the movement locus figure of reciprocal progressive motion respectively with curve; Wherein, (a) is the movement locus figure linearly doing reciprocal progressive motion, and (b) is the movement locus figure doing reciprocal progressive motion along curve.
Fig. 5 moves back and forth the motion mode be separated with progressive motion linearly does reciprocal progressive motion respectively movement locus figure with curve; Wherein, (a) is the movement locus figure linearly doing reciprocal progressive motion, and (b) is the movement locus figure doing reciprocal progressive motion along curve.
Fig. 6 is that 4 kinds of reciprocal progressive motions in sinking EDM lathe control embodiment schematic diagram; Wherein, (a) is the reciprocal progressive motion feeding mode of shaped electrode, and (b) is the reciprocal progressive motion feeding mode of workpiece, (c) be shaped electrode back and forth and workpiece progressive motion feeding mode, (d) is the reciprocal and shaped electrode progressive motion feeding mode of workpiece.
Fig. 7 is that 4 kinds of reciprocal progressive motions in spark coil cutting processor bed control embodiment schematic diagram; Wherein, (a) is the reciprocal progressive motion feeding mode of wire electrode, and (b) is the reciprocal progressive motion feeding mode of workpiece, (c) be wire electrode back and forth and workpiece progressive motion mode, (d) is the reciprocal and wire electrode progressive motion feeding mode of workpiece.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
A kind of reciprocal gradual self adaptation feed control method for electric spark machine tool, produce reciprocal gradual feed motion by control tool electrode and workpiece to realize self adaptation feeding and control, short-circuit condition is utilized always to occur in rule after regular picture state, progressive motion is performed at Light Condition, and progressive motion is stopped after recognizing regular picture state, avoid spark discharge to process and be absorbed in short-circuit condition, utilize the motion of the rollback in moving back and forth to add the gap of large electrode and workpiece simultaneously, accelerate chip removal, improve discharging condition.So, when feeding controlling without the need to detecting short-circuit condition, only need detect the unloaded self adaptation feeding that can realize electric spark machine tool with this two states of regular picture and controlling.
As shown in (a) in Fig. 1, tool-electrode moves forward to the right B1 point by starting position A point, then back to left side C1 point, then proceeds to the right B2 point, and then back to left side C2 point, so constantly repeats.In this process, tool-electrode is advanced to reciprocal center O2 from B2 point to C2 point relative to the reciprocal center O1 point of workpiece from B1 point to C1 point.Owing to adding the motion of reciprocal forward-reverse on the basis of macroscopical progressive motion, when the gap that the given amount of feeding of control system crosses ambassador's workpiece and wire electrode is too little, setback makes gap become large gradually by little, thus in fallback procedures, obtain a suitable discharging gap, produce electric spark, as shown in (b) in Fig. 1; When the given amount of feeding of control system is too small make the gap of workpiece and wire electrode too large time, forward travel makes gap by diminishing gradually greatly, thus in advance process, obtain a suitable discharging gap, produces electric spark, as shown in (c) in Fig. 1.By this reciprocal progressive this special feed motion mode, automatically can obtain a suitable discharging gap between workpiece and tool-electrode, facilitate normal spark discharge, ensure processing continue carry out.
Reciprocal gradual feed motion between tool-electrode and workpiece, has two kinds of modes: the mode of (one) reciprocating motion and progressive motion integration; (2) reciprocal gradual feed motion is separated into reciprocating motion and progressive motion, then produces reciprocal gradual feed motion by the composition principle of motion.
The motion mode of reciprocating motion and progressive motion integration, as shown in Figure 2, concrete steps are as follows:
Step 1, sets the initial parameter of reciprocal progressive motion at Light Condition;
Step 2, control tool electrode or workpiece with certain speed to march forward along given moving line from current location to, identify whether to enter regular picture state by the constantly change of detector gap voltage and electric current in feed motion process;
Step 3, after identifying and entering regular picture state, feed-disabling moves, and record current location also stops certain hour in current location; Described stop certain hour selects according to the size of the response speed of kinetic control system and the electric spark of generation, to ensure the time of certain spark discharge processing;
Step 4, along former feed-paths fast fallback, judges whether to enter Light Condition by the change of detector gap voltage and electric current in rollback motion process;
Step 5, after identifying and entering Light Condition, stop rollback motion, the position that fast feed to step 3 records, then returns step 2;
Step 6, repeats step 2-step 5, so constantly carries out the reciprocal progressive motion of forward-backward-readvance, until spark machined terminates.
Move back and forth the motion mode be separated with progressive motion, as shown in Figure 3, concrete steps are as follows:
Step 1, sets the initial parameter of reciprocal progressive motion at Light Condition;
Step 2, a maintenance in tool-electrode and workpiece is static, and another is that reciprocal center ceaselessly moves back and forth with certain amplitude and frequency along given moving line with current location; Described certain amplitude and frequency determine according to the size in the response speed of kinetic control system, the size of tool-electrode and spark discharge gap, to ensure higher working (machining) efficiency;
Step 3, make in reciprocal center or step 2 keep static workpiece or tool-electrode progressive forward with certain speed along given moving line, in feed motion process, checked whether situation Light Condition and regular picture state occurring and alternately occurs by the change of constantly detector gap voltage and electric current;
Step 4, progressive when stopping after the situation that generation Light Condition and regular picture state alternately occur, and the change continuing through detector gap voltage and electric current in current location checks whether the situation being still in Light Condition and regular picture state and alternately occurring, if then keep halted state, then return step 3 if not;
Step 5, repeats step 3-step 4, so constantly carries out advancing-stopping-progressive motion that readvancing, ceaselessly performs the reciprocating motion of step 2, until spark machined terminates simultaneously.
Described in the step 3 of the motion mode that above-mentioned reciprocating motion is separated with progressive motion with reciprocating motion with the step 2 of the motion mode of progressive motion integration, certain speed is determined by following method:
(1) before workpiece is not by spark machined, owing to also there is no for the actual measurement data utilized, therefore can to determine an initial velocity value according to the spark machined experience of processed workpiece material;
(2) after workpiece is by spark machined, first the actual ablation speed of the displacement detector utilizing lathe attached to workpiece carries out on-line measurement, then adopt the process velocity of certain Forecasting Methodology to future to predict according to a series of historical measurement data, and this predicted value is defined as the speed of motion control.Such as, utilize the every position of cycle T to current generation spark discharge at regular intervals of grating scale to detect, obtain a series of position data P
1, P
2, P
3, P
4..., thus obtain a series of instantaneous ablation speed V
1, V
2, V
3..., wherein V
1=| P
2-P
1|/T, V
2=| P
3-P
2|/T, V
3=| P
4-P
3|/T, recycles these historical datas and adopts first-order difference predictor formula V
e=V
i+ (V
i-V
i-1) following speed is predicted, i.e. V
e1=V
2+ (V
2-V
1), V
e2=V
3+ (V
3-V
2) ..., and by the result V of each prediction and calculation
eas the speed of motion control.
In order to work pieces process become designed by mechanical configurations and size, tool-electrode or workpiece must do reciprocal gradual feed motion along given feed-paths.Given moving line described in above-mentioned two kinds of control flows has straight line and curve two kinds of situations.As (a) in Fig. 4 is depicted as by move back and forth and the mode of progressive motion integration linearly to be done the movement locus of reciprocal progressive motion to B point by A point, the track of wherein advance or setback is all given straight line, and both have subregion overlap; As (b) in Fig. 4 is depicted as by move back and forth and the mode of progressive motion integration to be done the movement locus of reciprocal progressive motion to B point along curve by A point, the track of wherein advance or setback is all given curve, and both have subregion overlap.Similar by moving back and forth the mode that is separated with progressive motion linearly to do the movement locus of reciprocal progressive motion integrated with progressive motion with reciprocating motion respectively by A point with mode from curve to B point, as shown in (a) He (b) in Fig. 5, just namely constantly move reciprocatingly at current point A, and more around the reciprocating motion number of repetition of same reciprocal central point.
According to relative motion principle, reciprocal progressive motion can all be born by tool-electrode, also can all be born by workpiece, or by tool-electrode and workpiece bear respectively move back and forth with progressive motion wherein one move.Therefore, when adopt by move back and forth and the mode of progressive motion integration produces the control flow of reciprocal gradual feed motion time, control method of the present invention has 2 kinds of patterns: (1) tool-electrode does reciprocal asymptotic motion; (2) workpiece does reciprocal asymptotic motion; When adopting the mode be separated with progressive motion by reciprocating motion to produce the control flow of reciprocal gradual feed motion, control method of the present invention has 4 kinds of patterns: (1) tool-electrode moves reciprocatingly and to be moved forward gradually at reciprocal center, and namely tool-electrode does reciprocal asymptotic motion; (2) workpiece moves reciprocatingly while moved forward gradually at reciprocal center, and namely workpiece does reciprocal asymptotic motion; (3) tool-electrode move reciprocatingly+workpiece does asymptotic motion; (4) workpiece move reciprocatingly+tool-electrode does asymptotic motion.
Electric spark machine tool is divided into the polytypes such as the processing of sinking EDM, Wire-cut Electrical Discharge Machining, EDM Grinding, electric spark generate, nonmetal spark machined and electric spark surface peening, and wherein most widely used is sinking EDM lathe and spark coil cutting processor bed.According to noted earlier, in sinking EDM lathe, when implementing of the present invention, reciprocal progressive motion has 4 kinds of embodiments: (1) allows workpiece fix, and controls shaped electrode and do reciprocal progressive motion, as shown in (a) in Fig. 6; (2) allow shaped electrode fix, and control workpiece and do reciprocal progressive motion, as shown in (b) in Fig. 6; (3) control shaped electrode to move reciprocatingly, and control workpiece and do progressive motion, as shown in (c) in Fig. 6; (4) control workpiece to move reciprocatingly, and control shaped electrode and do progressive motion, as shown in (d) in Fig. 6.In spark coil cutting processor bed, when implementing of the present invention, reciprocal progressive motion has two kinds of embodiments, and (1) allows workpiece fix, and control electrode silk does reciprocal progressive motion, as shown in (a) in Fig. 7; (2) allow wire electrode fix, and control workpiece and do reciprocal progressive motion, as shown in (b) in Fig. 7; (3) control electrode silk moves reciprocatingly, and controls workpiece and do progressive motion, as shown in (c) in Fig. 7; (4) control workpiece to move reciprocatingly, and control electrode silk does progressive motion, as shown in (d) in Fig. 7.
The above; be only the detailed description of the invention in the present invention; but protection scope of the present invention is not limited thereto; any people being familiar with this technology is in the technical scope disclosed by the present invention; the conversion or replacement expected can be understood; all should be encompassed in and of the present inventionly comprise within scope, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (4)
1. the reciprocal gradual self adaptation feed control method for electric spark machine tool, it is characterized in that, produce reciprocal gradual feed motion by control tool electrode and workpiece to realize self adaptation feeding and control, short-circuit condition is utilized always to occur in rule after regular picture state, progressive motion is performed at Light Condition, and progressive motion is stopped after recognizing regular picture state, avoid spark discharge to process and be absorbed in short-circuit condition, utilize the motion of the rollback in moving back and forth to strengthen the gap of tool-electrode and workpiece simultaneously, accelerate chip removal, improve discharging condition, described reciprocal gradual feed motion is the motion mode of reciprocating motion and progressive motion integration, or moves back and forth the motion mode be separated with progressive motion, described reciprocating motion refer to tool-electrode relative to workpiece on given feed-paths with the motor pattern of forward-backward-readvance constantly forward-reverse repeatedly, described progressive motion refers to reciprocating while, and reciprocating center is pushed ahead gradually along given feed-paths.
2. a kind of reciprocal gradual self adaptation feed control method for electric spark machine tool according to claim 1, it is characterized in that, the motion mode of described reciprocating motion and progressive motion integration, comprises the following steps:
Step 1, sets the initial parameter of reciprocal progressive motion at Light Condition;
Step 2, control tool electrode or workpiece with certain speed to march forward along given moving line from current location to, identify whether to enter regular picture state by the constantly gap voltage of testing tool electrode and workpiece and the change of electric current in feed motion process; Described certain speed be before workpiece is not by spark machined according to process workpiece material spark machined experience determine, the predicted value of the practical work piece ablation speed obtained according to on-line measurement after workpiece is by spark machined is determined;
Step 3, after identifying and entering regular picture state, feed-disabling moves, and record current location also stops certain hour in current location, and described stop certain hour determines according to the size of the response speed of kinetic control system and the electric spark of generation;
Step 4, along former feed-paths fast fallback, judges whether to enter Light Condition by testing tool electrode and the gap voltage of workpiece and the change of electric current in rollback motion process;
Step 5, after identifying and entering Light Condition, stop rollback motion, the position that fast feed to step 3 records, then returns step 2;
Step 6, repeats step 2-step 5, so constantly carries out the reciprocal progressive motion of forward-backward-readvance, until spark machined terminates.
3. a kind of reciprocal gradual self adaptation feed control method for electric spark machine tool according to claim 1, is characterized in that the motion mode that described reciprocating motion is separated with progressive motion comprises the following steps:
Step 1, sets the initial parameter of reciprocal progressive motion at Light Condition;
Step 2, a maintenance in tool-electrode and workpiece is static, and another is that reciprocal center ceaselessly moves back and forth with certain amplitude and frequency along given moving line with current location; Described certain amplitude and frequency determine according to the size in the response speed of kinetic control system, the size of tool-electrode and spark discharge gap;
Step 3, make in reciprocal center or step 2 keep static workpiece or tool-electrode progressive forward with certain speed along given moving line, in feed motion process, checked whether situation Light Condition and regular picture state occurring and alternately occurs by the constantly gap voltage of testing tool electrode and workpiece and the change of electric current; Described certain speed be before workpiece is not by spark machined according to process workpiece material spark machined experience determine, the predicted value of the practical work piece ablation speed obtained according to on-line measurement after workpiece is by spark machined is determined;
Step 4, progressive when stopping after the situation that generation Light Condition and regular picture state alternately occur, and the change of the gap voltage and electric current that continue through testing tool electrode and workpiece in current location checks whether the situation being still in Light Condition and regular picture state and alternately occurring, if then keep halted state, then return step 3 if not;
Step 5, repeats step 3-step 4, so constantly carries out advancing-stopping-progressive motion that readvancing, ceaselessly performs the reciprocating motion of step 2, until spark machined terminates simultaneously.
4., according to claim 2 or a kind of reciprocal gradual self adaptation feed control method for electric spark machine tool according to claim 3, it is characterized in that: described given moving line comprises straight line and curve two kinds of situations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310675205.5A CN103752962B (en) | 2013-12-13 | 2013-12-13 | For the reciprocal gradual self adaptation feed control method of electric spark machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310675205.5A CN103752962B (en) | 2013-12-13 | 2013-12-13 | For the reciprocal gradual self adaptation feed control method of electric spark machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103752962A CN103752962A (en) | 2014-04-30 |
| CN103752962B true CN103752962B (en) | 2016-04-06 |
Family
ID=50520365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310675205.5A Active CN103752962B (en) | 2013-12-13 | 2013-12-13 | For the reciprocal gradual self adaptation feed control method of electric spark machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103752962B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475892A (en) * | 2014-10-30 | 2015-04-01 | 苏州市宝玛数控设备有限公司 | Control device for intelligently switching working fluid of medium-speed wire electric spark wire-electrode cutting |
| CN108349032B (en) * | 2015-10-20 | 2022-03-25 | 三菱电机株式会社 | Electric discharge machine |
| CN106378499B (en) * | 2016-09-05 | 2018-06-12 | 常州大学 | Electrical discharge machining detection control method and its equipment based on prediction pulse |
| CN109500460B (en) * | 2018-12-07 | 2020-09-11 | 苏州电加工机床研究所有限公司 | Method for measuring commutation period and overshoot amplitude of electric spark servo machining shaft |
| CN109693009B (en) * | 2019-01-16 | 2020-07-24 | 南京航空航天大学 | Workpiece reciprocating motion assisted axial flushing electrolytic wire cutting machining method and device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6044091B2 (en) * | 1978-06-21 | 1985-10-01 | 株式会社井上ジャパックス研究所 | Electric discharge machining equipment |
| DE3525683A1 (en) * | 1985-07-18 | 1987-01-29 | Agie Ag Ind Elektronik | METHOD FOR CONTROLLED RETREAT MOVEMENT OF A LOWER ELECTRODE IN AN ELECTRIC EDM MACHINE |
| DE3644042A1 (en) * | 1986-12-22 | 1988-06-30 | Agie Ag Ind Elektronik | METHOD AND DEVICE FOR RINSING THE ERODING ZONE AT ELECTROEROSIVE LOWERING |
| DE3817302C1 (en) * | 1988-05-20 | 1989-10-26 | Ag Fuer Industrielle Elektronik Agie Losone Bei Locarno, Losone, Ch | |
| CN1063996C (en) * | 1995-09-04 | 2001-04-04 | 机械工业部苏州电加工机床研究所 | Electrode wire running method of electric spark wire cutting machine tool |
-
2013
- 2013-12-13 CN CN201310675205.5A patent/CN103752962B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103752962A (en) | 2014-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103752962B (en) | For the reciprocal gradual self adaptation feed control method of electric spark machine tool | |
| CN105499726A (en) | Methods for the electroerosion machining of high-performance metal alloys | |
| CN102909447B (en) | Electric spark servo control method based on current pulse probability detection | |
| RU2535436C2 (en) | Device for spark erosion 3d copying (versions) | |
| CN102091839B (en) | Bunched electrode high-speed discharge processing method | |
| Rajurkar et al. | Improvement of EDM performance with advanced monitoring and control systems | |
| KR20140061977A (en) | Electric discharge machining die sinking device and related method of operation | |
| CN102166676A (en) | Method and device for machining insulating ceramic by reciprocating wire-cut electrical discharge machining | |
| Hoang et al. | A new approach for micro-WEDM control based on real-time estimation of material removal rate | |
| CN104772535B (en) | Open three dimensional runner high speed arc spraying discharge layer sweeps processing method | |
| CN102672293B (en) | Electric discharge machine | |
| Zhu et al. | High-speed vibration-assisted electro-arc machining | |
| CN112823992A (en) | Laser and electrolyte combined processing method and processing device thereof | |
| Kong et al. | Electrochemical machining for micro holes with high aspect ratio on metal alloys using three-electrode PPS in neutral salt solution | |
| CN101572231B (en) | Method and device for forming vertical through hole in semiconductor | |
| CN103831496A (en) | Method for machining grooves in shaft | |
| CN204843180U (en) | Wire -electrode cutting machine | |
| CN103008809A (en) | Combined machining method of metal materials | |
| CN104057179A (en) | Power Supply Device For Electrical Arc Welding And Controlling Method Therefor | |
| Yueqin et al. | Interelectrode discharge mechanism in high-speed wire electrical discharge machining | |
| Lin et al. | Electrochemical machining technology and its latest applications | |
| CN109396581A (en) | A kind of cutter device and its working method of conductor material | |
| Ganapati et al. | Influence of process parameters of electrical discharge machining on MRR, TWR and surface roughness: A review | |
| CN103418866A (en) | Sheet-metal machining device | |
| CN111112764A (en) | Pulse gas-assisted mask electrolytic machining device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |