JPH0335936A - Discharge state analyzing device - Google Patents

Abstract

PURPOSE:To accurately discriminate the state of electric discharge machining already effected by means of data by which a discharge state is classified more finely by providing an efficiency calculating means which determines normal discharge from discharge data created by a discharge data creating means and calculates a ratio of a generating interval of normal discharge as efficiency. CONSTITUTION:When a discharge voltage and a discharge current are detected by means of detectors 7 and 8, detecting signals therefrom are digitally converted and inputted during each of signal sampling periods set at specified intervals by means of a signal sampling means 16-1 in a CPU 16, and discharge data is created by a discharge data creating means 16-2. From discharge data created by the discharge data creating means 16-2, normal discharge is determined by an efficiency calculating means 16-4 and a ratio of a generating interval of normal discharge is calculated as efficiency. From discharge data created by the discharge data creating means 16-2, a stability calculating means 16-5 determines a discharge state as stability of discharge in a ratio of the total number of discharge generating times to the number of discharges except a normal discharge.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a discharge state analysis device for analyzing a military state in, for example, ``Noyer discharge application''.

(Junto's technology) Electric discharge 1) 41 types include - Neuer electric discharge machining and die-sinker electric discharge machining, but among these, for example, wire electric discharge machining is a process in which a wire electrode is attached to the workpiece. The pressurized object and the wire electrode are placed at a predetermined interval and penetrate into the processing chamber, and in this state, a DC voltage is applied between the object and the wire electrode. Then, for example, the wire electrode is brought close to the covered part II' and the gap amount is set to a predetermined value ff.
11, an electric discharge occurs between the wire electrode and the workpiece!
U-do. However, this discharge energy applies T to the pressurized object.

In such a wire discharge device 1], it is judged whether the pressurized state is good or not, but this judgment is made based on whether the discharge state is normal or abnormal, and this judgment is made by the following method. ing. In other words, ■A worker places the discharge pillar 1'1
Visual L2: The state of discharge is determined from the brightness of this discharge stroke based on experience and ribs.

■The worker listens to the sound of discharge and judges the state of discharge based on experience and intuition from the tl of this discharge.

■If the wire electrical discharge machining equipment is equipped with an oscilloscope, this oscilloscope can be used to display the waveforms of the discharge voltage and the discharge current between the 1st electrode and the pressurized object, and the 11th discharge The voltage and discharge current status is determined.

■° - Noiya Discharge Conditioning Device Preliminary Criteria for Determining the Quality of the Discharge Condition or Inugashii] So to speak, the discharge condition is determined according to this criterion.

However, in the above method, the current discharge state is iE
It is possible to determine whether the discharge is m or abnormal, but more detailed discharge conditions such as discharge efficiency and stability cannot be determined if all < 11. Furthermore, if a worker constantly monitors the machining process, it will be possible to deal with the occurrence of an abnormal discharge, but if, for example, unmanned machining of 7 pieces is carried out, the discharge state will not be affected at all. For example, if a non-discharge state occurs, the period will be known. I can't do two things. The above is wide, IJ! 1. '；ji ＃o
,',,I, by being a member of the general public,'! , 2゛,, < The problem that the light will solve i) 1, also 1) 4. (1) tL in discharge state
'I'E? It is not possible to distinguish between °4 and ↑4j, but 5. Display the discharge state in a finer pattern of Hi5. ? The broken state for discharge is lf, ii1! It is impossible to distinguish between the two.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a discharge state analysis device that can analyze the IJ father power state in order to determine the efficiency of the a-power.

Another object of the present invention is to provide a discharge state analysis device capable of obtaining history such as discharge efficiency.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a discharge voltage applied between a discharge electrode and a workpiece, and a discharge current flowing between the electrode and the workpiece. A detector for detecting a signal, a signal acquisition means for digitally converting the detection signal from the detector at a predetermined sampling period every 191 intervals, and a signal acquisition means for converting the detection signal from the detector into a digital signal at a predetermined sampling period. The 11th stage of discharge data creation creates discharge data such as group 714 L for each discharge from the detection signal. Normal discharge is determined from the discharge data created by the discharge data creation means of ", -, and the interval of occurrence of this normal discharge (:7 ) Efficiency calculation that calculates M combination as efficiency - + l
This is a discharge state analysis device which attempts to achieve the above object by providing + and H.

Further, the present invention aims to achieve the above object by providing stability calculation means for determining the ratio of the number of discharges other than normal discharges to the total number of discharges as the stability of discharge from the discharge data created by the discharge data creation means. This is a discharge state analysis device.

Furthermore, the present invention provides contact rate calculation means for detecting abnormal discharge from multiple values of the discharge voltage or discharge current created by the discharge data creation means and calculating the occurrence rate of this abnormal discharge as a contact rate. This is a discharge state analysis device that attempts to achieve the following.

x The present invention provides a discharge state that attempts to achieve the above object by comprising a history creation and creation means for creating history data consisting of efficiency, stability, contact rate, etc. from the discharge data created by the discharge data creation means. It is an analysis device.

(Function) By providing such means, when the discharge voltage and discharge current are detected, this detection signal is digitally converted and captured by the signal acquisition means every signal acquisition period at regular intervals, and the discharge data is obtained. Discharge data is created by the creation means. Then, the efficiency calculation means calculates normal discharge from the discharge data created by the discharge data creation means and calculates the ratio of the interval between occurrences of this normal discharge as the efficiency.

Further, from the discharge data created by the discharge data creation means, the stability calculation means calculates the ratio of the number of discharges other than normal discharges to the total number of discharge occurrences as the stability of discharge.

Furthermore, the contact rate calculation means detects abnormal discharge from the multivalued discharge voltage or discharge current created by the discharge data creation means and calculates the occurrence rate of this abnormal discharge as the contact ratio.

Also, the history creation method from the above discharge data is efficient.

Create historical data consisting of stability, contact rate, etc.

(Example) Hereinafter, a first example of the present invention will be described with reference to the drawings.

FIG. 1 is an overall configuration diagram of a discharge state analysis apparatus applied to wire electric discharge machining. A workpiece 2 is permeated into the inside of the processing tank 1 . Wire electrodes 3 are arranged on this workpiece 2 at predetermined intervals. Note that this wire electrode 3
is supported by an upper wire guide body 4 and a lower wire guide body (not shown). A DC power source 6 is connected between the workpiece 2 and the wire electrode 3 via a discharge control circuit 5 to form a discharge circuit. In this case, the positive electrode of the DC power source 6 is connected to the workpiece 2.

In this discharge circuit, a voltage detector 7 is connected in parallel to the DC power source 6, and a current detector 8 is connected in series to the DC power source 6.

On the other hand, 10 is an analysis device main body, and this analysis device main body 10 is equipped with attenuators (ATT) 11 and 12. A voltage detector 7 is connected to one attenuator 11, and a current detection device is connected to the other attenuator 12. device 8 is connected. A/D (analog/digital) converters 13, 14 each having a built-in memory are connected to these attenuators 11, 12, and these A/D converters 13, 14 are connected to a CPU (central processing unit) via a bus 15. device) 16. This CPU16 has bus 15
A timing controller 17, a RAM (Random Access Memory) 18, a ROM (Read Only Memory) 19, a display drive unit 20, and a printer drive unit 21 are connected through the memory. timing controller 17
is for controlling the signal acquisition timing in the A/D converters 13 and 14. Further, a display device 22 is connected to the display drive section 20 to drive the display device 22, and a printer 23 is connected to the printer drive section 21 to print out history data of the discharge state. R.O.
M19 stores a signal acquisition timing program for the A/D converters 13 and 14 in the timing controller 17.

However, according to this signal acquisition timing program, each A/D converter 13, 14 simultaneously converts the voltage detection signal and current detection signal into 8-bit digital signals every For example, 1024 to 65538 B of data is collected during the collection period. As a result, each A/D converter 1.3, 14,
CPU 16, timing controller 17 and ROMI
9 constitutes a signal acquisition means.

Further, the ROM 19 stores a data creation program and a history creation program. As a result, the above CPU
16, as shown in FIG. 2, has the functions of signal acquisition means 16-1, discharge data creation means 16-2, and history creation means 16-3. In addition, the signal acquisition means 16-1
As mentioned above, this is a part of the function of the signal acquisition means.

The discharge data creation means 16-2 has a function of creating discharge data consisting of parameters such as discharge voltage and discharge current for each discharge from the digital voltage detection signal and digital current detection signal collected by the signal collection means. .

The history creation means 16-3 has a function of determining efficiency, stability, contact rate, etc. from the discharge data created by the discharge data creation means ERRO 2, and creating history data of these efficiency, stability, and contact rate. be. Note that this history data of the discharge state is stored in the RAM 18.

Specifically, the efficiency calculation means 16-4 and the stability calculation means 16
-5 and contact rate calculation means 16-6. The efficiency calculation means 16-4 is the discharge data creation means 16-2.
A function that calculates normal discharge from the discharge data created by , and calculates the ratio of the occurrence period of this normal discharge during the signal collection period, that is, the duty ratio of the current pulse width of normal discharge and the discharge current that is the signal collection period, as efficiency. It is something that has. The stability calculating means 16-5 has a function of calculating the ratio of the number of discharges other than normal discharges to the total number of discharges as the stability of discharge from the discharge data. The contact rate calculating means 16-6 has a function of detecting an abnormal discharge from the value of each discharge voltage or discharge current of the discharge data and calculating the ratio of the duration of this abnormal discharge to the total data length as a contact rate. It is something.

Furthermore, the CPU 16 is equipped with an internal timer 16T, and this internal timer 167 is activated when the CPU 16 determines that no discharge voltage appears during electrical discharge machining or when the workpiece 2 is replaced. It operates when it is determined and the timer counts the time. Note that since the time to replace the workpiece 2 is set in advance, it is possible to determine whether the discharge voltage does not appear during electrical discharge machining or not. Also, the above C
The PU 16 compares the discharge energy for each discharge with a discharge energy threshold preset according to the diameter of the wire electrode 3 based on the discharge data, and when each discharge energy exceeds the discharge energy threshold, the wire It has a function that determines that there is a high risk of disconnection of the electrode 3 and prints out this fact as rEJ.

Next, the operation of the apparatus configured as described above will be explained with reference to it.

A DC voltage is applied between the workpiece 2 and the wire electrode 3 from the DC power supply 6 through the discharge control circuit 5, and in this state, when the gear knob amount between the workpiece 2 and the wire electrode 3 reaches a predetermined amount, Pulse discharge occurs between the workpiece 2 and the wire electrode 3. The energy of this pulse discharge causes the workpiece 2 to
is processed.

In this state, the voltage detector 7 detects the pulse discharge voltage between the workpiece 2 and the wire electrode 3 and outputs the voltage detection signal, and the current detector 8 detects the pulse discharge voltage between the workpiece 2 and the wire electrode 3. Detects the flowing pulse discharge current and outputs the current detection signal. These voltage detection signals and current detection signals are each attenuated by an attenuator 11.12 to a level that is easy to process, and then input to an A/D converter 13.14. At this time,
Each A/D converter 13, 14 digitally converts the voltage detection signal and the current detection signal into 8 bits and captures them at the same time, for example, every xns during each signal sampling period at regular intervals. As a result, the above-mentioned data B is captured in one signal sampling period. The digital voltage detection signal and digital current signal captured in one signal sampling period are temporarily stored in the memory of each A/D converter 13 and 14, and are transferred to the C after each signal sampling period.
The data is transferred to RAM1B by the PU16 and stored therein.

Then, for example, when the 10 signal sampling period ends, C
The discharge data creation means 16-2 of the PU 16 generates third data from each digital voltage detection signal and digital current signal.
Obtain the waveforms of lightning voltage and discharge current as shown in the figure,
From these waveforms, the occurrence number rlJ C is determined in the order of discharge occurrence.
2J... rNJ is attached. Then, the CPU 16 determines the discharge start at, C2...an in each discharge based on these waveforms.
, discharge end bl, b2...bn, discharge voltage cl,
C2-en, MS flow peak di, d2-dn, current pulse width el, C2...en, discharge energy f'l
, C2... "11, Pulse interval g+, g2...
Discharge data D consisting of parameters such as go, etc. is obtained and stored in the RAM 18 as a table. Note that the discharge energy I'l, C2...rn is the discharge voltage c1. ．．
It is obtained by multiplying C2·cn by the current peaks dl and d2-dn, respectively. Note that at this time, the operation of capturing the voltage detection signal and current detection signal for each signal sampling period is continued.

Next, the efficiency calculation means 16-4 of the CPU 16 compares the preset discharge limit voltage with each discharge voltage cl, C2,...cn during the 10 signal acquisition periods, and determines which level is lower than the discharge limit voltage. A discharge voltage, for example C2, is detected as an arc discharge pulse which is an abnormal discharge and a short circuit. As a result, abnormal discharge data is removed from the discharge data D. Then, the efficiency calculating means 16-4 calculates the current pulse width gl of normal discharge, g3. . . . The total period pt of gn is determined, and the total intercostal interval Ho of 10 signal sampling periods is determined, and the ratio of these total periods Pt and H, that is, the duty ratio of the discharge current waveform QQ-Pt/H.

is calculated as efficiency. Then, efficiency calculation means 16-
4 calculates the efficiency Q from the discharge data D that is created sequentially with the passage of time, and sequentially stores it in the RAM 18 to create efficiency history data.

Further, the stability calculation means 16-5 calculates the stability. First, the stability calculating means 16-5 calculates the discharge voltage cl, C3°C4, . . . from the discharge data D in which abnormal discharge has been erased.
n is extracted again to create a histogram of the discharge voltage shown in FIG. This histogram has two normal distributions Q1
．． Q2 appears, of which the normal distribution Ql indicates the discharge voltage in a state where the space between the workpiece 2 and the wire electrode 3 has been sufficiently cleaned by the flow of machining acid and machining debris has been removed; The normal distribution Q2 is a transient phenomenon in which a considerable amount of machining debris remains between the workpiece 2 and the wire electrode 3, and the resistance value between the gaps decreases due to the machining debris, causing electrical discharge even when the discharge voltage is low. This shows a discharge. and,
The stability calculating means 16-5 calculates the number Na of abnormal discharge occurrences and the number Nt of transient discharge occurrences, and calculates the ratio of these occurrence numbers to the total number N of discharge occurrences, that is, the stability 5e Se-(Na+Nt)/N Calculate. Here, the stability Se indicates whether the workpiece 2 and the wire electrode 3 are too close to each other. For example, if the workpiece 2 and the wire electrode 3 are too close together without machining debris, the resistance value between the workpiece 2 and the wire electrode 3 will decrease, causing abnormal discharge and transient discharge. This is because it occurs. Then, the stability calculation means 16-5 calculates the stability S from the discharge data D that is created sequentially over time.
e is calculated and sequentially stored in the RAM 18 to create stability history data.

Further, the contact rate calculation means 16-6 calculates the ratio of the abnormal discharge duration obtained previously to the total data length as contact C4<A-abnormal discharge duration/total data length. Then, the contact rate calculation means 16-6 calculates the contact rate A from the discharge dates that are created sequentially over time, and sequentially stores them in the RAM 18 to create contact rate history data.

As described above, the historical data of efficiency Q1 stability Se and contact rate A are created, and these efficiency Q, stability Se
and the contact rate A are sent to the printer drive section 21 by the CPU 1.6 and printed out by the printer 23. FIG. 5 is an example of a printout, in which the efficiency Q and the stability Se are shown as historical data by the length of horizontal bars, and the contact rate A is shown numerically as historical data. Note that rEJ is attached along with the contact rate A, which is because the CPU 16 calculates the hl electric energy for each discharge and the discharge energy threshold value set r according to the diameter of the wire electrode 3 from the discharge data. By comparison, when each discharge energy exceeds the discharge energy threshold value, it is determined that there is a high risk of disconnection of the wire electrode 3, and fζ1 is set. Data such as the number of discharges, discharge energy, and discharge current are also printed out.

By the way, if machining conditions deteriorate during electrical discharge machining, electrical discharge will not occur between the workpiece 2 and the wire electrode 3, and electrical discharge machining will not be performed. In such a case, the discharge voltage does not appear, and the CPU 16 starts the internal timer 16T from this time. Then, when the discharge voltage appears again, CP
U16 stops the operation of the timer 167, calculates the non-discharge period G from the count value, and sends it to the printer drive unit 21.

As a result, the non-discharge period G is printed out as a no-signal time of, for example, 60 seconds. Further, during this non-discharge period G, the efficiency Q1 stability Se and the contact ratio A are zero. However, it is shown that the workpiece 2 is not being machined during this non-discharge period G.

On the other hand, the internal timer 167 operates even when the discharge voltage does not appear due to replacement of the workpiece 2 and counts the time, and the period required for the replacement at this time is printed out.

In this way, in the first embodiment, the discharge voltage and discharge current are taken in to create discharge data, the efficiency Q1 stability Se and the contact rate A are calculated from this discharge data, and the efficiency Q1 stability Se and contact rate A are calculated from the discharge data. Since the history data of the contact rate A is created and printed out, the discharge state can be analyzed and its history can be obtained. As a result, it is possible to optimally control the moving speed of the workpiece or wire electrode and the flow rate of machining fluid from the efficiency Q, thereby increasing the efficiency of electrical discharge machining. You can compare each electrical discharge machining device from here. In addition, it is easy to understand the rate at which electrical discharge occurs when machining debris is present between the workpiece 2 and the wire electrode 3, and the state of discharge of machining debris can be quantitatively determined. . Thereby, the flow rate of the machining liquid flowing between the workpiece 2 and the wire electrode 3 can be controlled to an optimum state, and machining efficiency can be improved.

Furthermore, it is possible to easily determine whether the workpiece 2 and the wire electrode 3 are too close to each other or too far apart based on the stability Se.
It becomes possible to optimally control the moving speed of the workpiece 2 or the wire electrode 3 during processing. Furthermore, if the stability Se is displayed in three degrees: low, good, and unstable, the state of electrical discharge machining and the degree of proximity between the object 2 and the wire electrode 3 can be easily understood visually.

Furthermore, from the value of the contact ratio A, it can be determined that when this value increases, the gap amount between the workpiece 2 and the wire electrode 3 is small and there is a high risk of contact, and when the contact ratio A is small, the gap amount becomes large. It can be determined that discharge is less likely to occur. In addition, in electric discharge machining, there is an optimum contact rate A, for example, 30%, depending on the type of workpiece 2, and the CPU 16 adjusts the electric discharge machining conditions, such as the moving speed of the wire electrode 3, etc., to achieve this contact rate value. Highly efficient electrical discharge machining is possible by applying feedback to the flow rate of machining fluid, etc.

Furthermore, since history data is created, even if electrical discharge machining is performed unattended, the discharge state during this unattended period can be accurately determined, and for example, even if a non-discharge state occurs, the period can be known. moreover,
Machining conditions and workpiece positioning accuracy during unmanned electrical discharge machining can be determined.

For example, when forming a square hole, if the positioning accuracy of the workpiece is low, the wire electrode 3 may be too close to one side, resulting in abnormal discharge, and the wire electrode 3 may be too far apart, resulting in no discharge on the other side. It can be determined from In addition, from the printed history data, you can know the time for rough machining and the time for each finishing process that is performed multiple times, as well as the time from positioning the wire electrode 3 when replacing the workpiece 2 to automatically connecting the wire. I understand.

Next, a second embodiment of the present invention will be described. In addition, the first
Components that are the same as those in the figures are given the same reference numerals, and detailed explanation thereof will be omitted.

FIG. 6 is an overall configuration diagram of a discharge state analysis apparatus applied to wire electric discharge machining, in which the workpiece 2 is moved on the XY plane by a table 30. This table 30 is provided with a position detector 31, and the position detector 31 detects the position of the table 30 on the XY plane. The device signal constituted by this position detector 31 is then manually inputted to the human power section 32 of the analysis device main body 10.

On the other hand, the ROM 19 of the analyzer main body 1-0 stores a wire position detection program and a machining shape and discharge determination program in addition to the above programs. As a result, C
As shown in FIG. 7, the PU 16 is newly equipped with a history creation means 35 having a wire position detection means 33 and a discharge determination means 34. The wire position detection means 33 is the indicator 2
It has a function of displaying the machining shape on 2 and also displaying the moving position of the wire electrode 3 along with the machining shape based on the position signal from the position detector 31.

The discharge determination means 34 determines the discharge from any one of the efficiency Q1 stability Se and the contact rate A calculated by the efficiency calculation means 16-4, the stability calculation means 16-5, and the contact rate calculation means 16-6. Does it belong to one of the multiple ranks divided from the best to the worst machining condition? +1 It has a different function. Note that this ranking may be determined by comprehensively judging the efficiency Q, the stability Se, and the contact rate A.

Next, the effect will be explained.

When electric discharge machining is started, the wire device detection means 33 displays a machining shape Qa as shown in FIG. 8 on the display 22. Note that in this machining shape Qa, sh is a start hole, indicating that electrical discharge machining is started from here. At the same time, the discharge voltage and discharge current are detected, and the discharge data D is created. Then, from this discharge data D, the efficiency calculation means 16-4 and the stability calculation means 1
6-5 and contact rate calculation means 16-6 each have efficiency Q1.
The stability Se and the contact rate A are calculated and their history data is created.

On the other hand, the position detector 31 detects the position of the table 30 and outputs the position signal. This position signal is sent to the input section 32, where it is digitally converted and converted into an RA.
It is stored in a predetermined area of M18. Here, the wire position detection means 33 detects the wire electrode 3 from the digital position signal.
Find the position of and store this position as historical data in RAM18.
to be memorized.

At the same time, the wire position detecting means 33 sends the determined current position of the wire electrode 3 to the display driving section 20 at any time. As a result, the current position vP of the wire M8Ii3 is displayed on the display 22 as ".". Then, the above efficiency Q, stability Se
and the contact rate A are respectively stored in the RAM 18 as historical data in correspondence with the position of the wire electrode 3.

Further, the electric discharge determining means 34 selects one of a plurality of ranks from which the electric discharge machining condition is divided from the best to the worst based on any one of the obtained efficiency Q1 stability Se and contact rate A. Determine whether it belongs to. for example,
If the efficiency Q belongs to the "4" rank, which is one rank below the best among the "5" ranks, the discharge determination means 34 displays a discharge determination "○" on the display 22. In this case, the display position of the discharge judgment is the position where the discharge voltage and discharge current were detected (corresponding to the vertical position). In addition, "◎" is the best rank, "△" is the rank one rank lower than rOJ, etc. It becomes.

In this way, in the second embodiment, the addition shape Qa is displayed and history data such as the position and efficiency Q of the wire electrode 3 are created to display the judgment results of the machining state. can be analyzed and its historical data can be obtained, especially for one workpiece 2.
The machining status on the machining path can be visually determined. As a result, it is possible to easily determine, for example, a portion that is in a no-discharge state and has not been machined, and furthermore, data for setting machining conditions for the next electric discharge machining can be obtained.

Note that the present invention is not limited to the above embodiments, and may be modified without departing from the spirit thereof. For example, to distinguish between a non-machined state and a non-discharge state during electrical discharge machining,
A light emitting element that emits light when a voltage is applied between the workpiece 2 and the wire electrode 3 may be provided to distinguish between the workpiece 2 and the wire electrode 3.
The distinction may be made based on the determination by the PU 16 of the start of electrical discharge machining and the end of electrical discharge machining. Furthermore, this device is applicable not only to wire electrical discharge machining equipment, but also to die-sinker electrical discharge machining, electrolytic machining, welding machines, laser application equipment, lighting equipment, sputtering equipment, PVD and CVD, etc. by changing the sampling range of voltage and current signals. It can also be applied to electrical discharge application equipment such as plasma processing equipment. Among these, in the sputtering apparatus, the flow rate of the discharge medium can be adjusted by detecting the discharge state.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a discharge state analysis device that can analyze a discharge state to find discharge efficiency and the like.

Further, the present invention can provide a discharge state analysis device that can obtain history of discharge efficiency and the like.

FIG. 1 is a configuration diagram, FIG. 2 is a functional block diagram, FIG. 3 is a waveform diagram of discharge voltage and discharge current, and FIG. FIG. 5 is a diagram showing an example of a printout of a discharge history, and FIGS. 6 to 8 are diagrams for explaining a second embodiment of the present invention. , Figure 6 is a configuration diagram, Figure 7
The figure is a functional block diagram, and FIG. 8 is a diagram showing a display example of the release@history state.

DESCRIPTION OF SYMBOLS 1... Processing tank, 2... Workpiece, 3... Wire electrode, 4... Upper wire guide body, 5... Discharge control circuit, 6... DC power supply, 7... Voltage detector, 8...
Current detector, 10... analysis device main body, 11. ．． 12・
...Attenuator, 13.14...A/D converter, 1
5... Bus, 16... CPU, 16-1... Signal acquisition means, 16-2... Discharge data creation means, 16-
3.35...History creation means, 16-4...Efficiency calculation means, 16-5...Stability calculation means, 16-6...
Contact rate calculation means, 17...timing controller,
18...RAM, 19...ROM, 20...Display drive section, 21...Printer drive section, 22...Display device, 23...Printer, 30...Table 31...
Position detector, 32... Input section, 33... Wire position detection means, 34... Discharge determining means.

Claims (4)

[Claims] (1) A detector that detects the discharge voltage applied between the discharge electrode and the workpiece and the discharge current flowing between the discharge electrode and the workpiece, and a detection signal from this detector that is sent at regular intervals. a signal collecting means for digitally converting and capturing at a predetermined sampling period every signal collecting period, and a discharge data creating means for creating discharge data such as a discharge voltage in each discharge from each detection signal collected by the signal collecting means. A discharge state analysis device characterized by comprising: efficiency calculation means for determining normal discharge from the discharge data created by the discharge data creation means and calculating the ratio of the interval between occurrences of this normal discharge as efficiency. (2) A detector that detects the discharge voltage applied between the discharge electrode and the workpiece and the discharge current flowing between the discharge electrode and the workpiece, and a detection signal from this detector that is sent at regular intervals. a signal collecting means for digitally converting and capturing at a predetermined sampling period every signal collecting period, and a discharge data creating means for creating discharge data such as a discharge voltage in each discharge from each detection signal collected by the signal collecting means. and a stability calculation means for determining the ratio of the number of discharges other than normal discharges to the total number of discharge occurrences as the stability of discharge from the discharge data created by the discharge data creation means. . (3) A detector that detects the discharge voltage applied between the discharge electrode and the workpiece and the discharge current flowing between the discharge electrode and the workpiece, and a detection signal from this detector that is sent at regular intervals. a signal collecting means for digitally converting and capturing at a predetermined sampling period every signal collecting period, and a discharge data creating means for creating discharge data such as a discharge voltage in each discharge from each detection signal collected by the signal collecting means. , a contact rate calculation means that detects abnormal discharge from each value of the discharge voltage or discharge current created by the discharge data creation means and calculates the occurrence rate of this abnormal discharge as a contact rate. Condition analysis device. (4) A detector for detecting the discharge voltage applied between the discharge electrode and the workpiece and the discharge current flowing between the discharge electrode and the workpiece, and a detection signal from this detector at regular intervals. a signal collecting means for digitally converting and capturing at a predetermined sampling period every signal collecting period, and a discharge data creating means for creating discharge data such as a discharge voltage in each discharge from each detection signal collected by the signal collecting means. , and history creation means for creating history data consisting of efficiency, stability, contact rate, etc. from the discharge data created by the discharge data creation means.