JPS584318A - Electron discharge method for conductive material and its device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The precise nature of this invention, as well as other features and benefits, will become readily apparent upon consideration of the following detailed description with reference to the accompanying AATS+.

ζO Hatsukusha, relates to a method and apparatus for circular manufacturing machining and electric discharge machining of conductive materials used in machine manufacturing.

ζO**a%For other processing techniques, 1ii is effective.
It can be applied to the processing of OIT rough fills in the s* area.
Also, emergency #I, such as those made by late-stage metallurgical
cl1 Effectively used for machining of soft materials ◇ Applicable to Sunma, ζO inventions, wafer dies, drawing dies, and OM-like machining A011 ◇ Tools, workpieces, and OMO electrical circuits Application of controlled voltage increases @IIO current pulses and discharge pulses'''e6! Jlk electrical processing decisions are omniscient (for example, USSR Invention Document No. 347.147;
minute 1m1B33P1102).

This person *a, please strictly state that you want P*Fil! ! It has the disadvantage that the surface is poorly processed.

This method is useful, for example, for making dies! used. It is further disadvantageous in that it does not compensate for tool wear such as the female die O taper.

Electrical discharge machining equipment is made up of electrically conductive materials that are connected to the machine and the workpiece through an insulating wire and generates nine current pulses.
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r@siemγkm stam-ni・maW'' (Electro discharge machining method O transistor llO * production and operation 0 selection) NIIM! 1kgM*se@v*1s7s, p
za, Ftg13) Machining is performed by applying current and discharge pulses to the electrical path 11 between the tool and the workpiece. Many machining operations are performed by current pulses.

A discharge pulse is added to the surface current pulse to amplify the amplification of the pulse with which the workpiece is machined. Pulse amplification degree O
It is found that the increase makes the processing geography more stable.

However, it eliminates undesirable effects such as taper of the bevel surface of the workpiece due to tool wear.

The essential object of the invention is to provide a conductive #0 electrical discharge machining method that makes it possible to obtain an 11-plane profile of a workpiece.

ζO Invented Conductive #0 Electrical Discharge Machined Weave is provided.

By applying circular amplified IFO current pulses and discharge pulses controlled by the workpiece and the zero-threshold electrical circuit, the discharge pulse peak voltage value is derived from the following formula according to the present invention. .

IJt = k t (H) ζζ, which is the u, d discharge pulse peak voltage. k is JI between the machining egos intermediate tool ^, the workpiece and the OMO gap! 1
It is a proportional electric switch that determines the relationship between the voltage at which edge breakdown occurs, the gap width, and the zero function. v (IFI) This is a function that draws the boolean of the workpiece 011 that can be obtained when performing AO processing.

The method according to ζO makes it possible to obtain surfaces with complex pull-fills in areas where it is difficult to achieve the desired effect with the processing techniques of ζO. This method also allows the processing of non-tKli<%A materials.

It is advisable to compensate for one odor consumption by increasing the discharge pulse peak voltage by kf(H)K). ζζ
in! (H) is a function that cycles from the desired value of displacement O value HK during machining to the displacement of the tool machining surface O due to tool wear. For example, the taper O of the die used in punching die 01111, Eliminate one of the negative effects of tool wear.

The machining cycle consists of a rough machining stage and a finishing machining stage.
In such a case, the O discharge pulse voltage in the most* and m machining stages is changed to the O discharge pulse generator in the most
It should be noted that the metal removal rate is proportional to the value of the metal removal rate in the finishing stage and is set at a higher level (than that of the O firing pulse voltage in the rough machining stage). Slipping improves efficiency.

This generator, furthermore, a current pulse generator, a discharge pulse generator connected to the machine and the workpiece through an insulation unit,
A device for electric discharge machining of electrically conductive material, comprising a mechanical supply mechanism and a kinematically related supporting tool, the device preferably including a unit for calculating the peak voltage of the The knitting hall 1 manual receives a signal proportional to the displacement of the metal linear shape, the 2 manual receives a signal proportional to the displacement of 10,000 during the machining period, and the s3 manual receives a signal proportional to the displacement of 10,000 during the processing period, and the s3 manual receives a signal proportional to the displacement of the AO metal linear. Receive the notes, so that both the front and back fills of the workpiece are v (II) K-, and the discharge pulse peak voltage ° needle is set to 0 electric path between the tool and the workpiece. The electric pulse beater voltage calculator is also connected to the discharge pulse generator through the discharge pulse peak voltage control unit to provide the device.

The above design makes it possible to vary the tool displacement value HE and thus the discharge pulse peak voltage.

In this generation, the discharge pulse generator is connected to the discharge pulse peak voltage control unit) to form a nine DC intensifier, the unit 0112 is itself connected to the zero DC voltage, and the output is the output of the differentiator circuit. The inputs of the switching elements KII and KII are connected, the input of the differentiating circuit is connected to a current pulse generator, and the output of the switching element O is connected to a DC voltage source through a power amplifier having one of nine power outputs. Connected to an insulating unit to provide large equipment.

This design allows the beater voltage of the discharge pulse to be controlled during machining by applying a signal proportional to the desired discharge pulse peak voltage to the input of the discharge pulse generator.

The invention further provides a tool orientation control circuit that is itself included in the power source and workpiece electrical circuit and is connected to the power source, synchronization path, and to the synchronization circuit via a square amplifier. , the feed mechanism control path, which is electrically connected to the synchronization a11 and is kinematically related to the step feed mechanism.
It consists of a step movement transmitter, a tool direction control circuit, a tool displacement data input circuit connected to a synchronization circuit,
An apparatus is provided in which the data input circuit has an output connected to a second input of a discharge pulse peak voltage calculator.

The method according to the invention is carried out as follows.

The electric current #1 and the ignition pulse are
applied to the threshold electrical circuit. The prefill to be processed is derived from the following expression:

r=ψ(H) Here, t (H) is the workpiece 2 and the machined surface 4 of the workpiece A1.
This is a function showing the relationship between the gap width between the two and the displacement value H of the tool l along the machining path 5.

The zero point is the starting point of the machining cycle.

The predetermined gap @r between the machining surface 6 of the workpiece 2 and the machining WJ4 of the tool 1 is determined by the appropriate peak voltage U of the discharge pulse.
, is maintained by selecting .

This must satisfy the following conditions.

Us = k(ψ(H)) Here, v(H)a is a function representing the gap width between workpiece 2 and machining li4 and 0, and during the 11Fi machining period, the above path 5 Ok, which is the value of the displacement of the machined surface moving along, is a proportionality constant that determines the function between the voltage at which dielectric breakdown occurs in the gap between the tool 1 and the workpiece 2, and the gap.

U = - The second ELD song 1a7 shows the U! for r when the processing is carried out in kerosene in the presence of ultrasonic waves. This is the relationship.

The O line 8 in FIG. 2 is the relationship of U to R of Maruba Kai when processing is performed in kerosene without ultrasonic waves.

Column 9 of 112aQ is the relationship between rK and Um when machining is carried out in aluminum with ram powder suspended in it without ultrasonic waves. H
Indicate the instant at different distances of j. This corresponds to the width rJK between the tool 1 and the workpiece 2, and the discharge is maintained by appropriately selecting the pulse peak voltage Ul. (Hj) Reference number 6 companies Indicates the workpiece profile that satisfies the following conditions.

r = t (H) Here, the n(H) line is the above function.

Processing involves consumption of aluminum. as a result,
The machining surface 4 of the tool °l moves along a path 10 in addition to the aforementioned path 5. The profile 11 of the workpiece 2 is summarized by the following equation.

r'=ψ(11)-ψ(H) The difference between profile 11 and desired G1 fill 3 is β, 0, that is, ! = r - r' = t (H) - 1 (II) + ψ (H
)=ψ(H)! -ψ(H) Here, ψ(II) is a function that describes the wear of the it process and the displacement l of the path 10 of the process AXO machining image due to the above-mentioned connection 5.

Ninth, to compensate for tool wear and obtain the desired profile of the workpiece 2, the discharge pulse repeater voltage U, must be increased by ΔU, keeping r=9(H) tk vho
When ζO, Δtyt = kψ(H), where kψ(H) is a function that determines how to increase the electric pulse repeater value by ΔU11e. It is obtained from Eq.

Us=k(f(H)+su(H))] Here, k [? (H) +? (H)) represents the discharge pulse beater voltage that compensates for tool wear. Breakdown voltage U! It is a proportionality constant that determines the gap IIr between the tool 1 and the workpiece 2 during machining, and the OMO adjustment. ψ(H) is the relationship that determines the relationship between the displacement value H of the tool 10 and the machining surface 4 along the path 5 during machining. 0ψ(H) The 0th iml, which is the function that determines the deviation of
The machining surface of machining AX moves along path 10 due to the 0 machining consumption O which indicates the moment when the machining @4 reaches the distance Hj K along the 0115 mentioned above. Profile 11 of machined surface 6
is 0 r′;ψ(II)−ψ(H) ζζ, which satisfies the following Oqin condition? (H), (if) is the Hirosoki function.

In order to obtain a filter satisfying the condition r −1r (H), Us must be chosen as follows.

U Hatake = k (v (H) + ψ (H)] Condition r = ?
In order to obtain the goofir (Fig. 4) that adds (H), we have a genicle consisting of several oatsa floors,
Discharge pulse peak voltage 04 B E1m as follows! ◎ U4■h[p(H)-a] Here, km proportional *a is Tos, ? (H) a In the above function, To rotation a is the rounding tariance that completes the machining that satisfies the condition t (H).

'Ps is selected as j1g8 of U4 and is a round value, and the rough machining of workpiece 2 satisfies the following O condition! Make l fill 12.

r' -f (H) -4 In the expression, p(II) term, 〇 condition r -? Pua that satisfies (II) 74 #3
To obtain the final machining stage, the electric discharge pulse peak voltage U
1 is the mountain〉ΔU■fe The leaf becomes bigger 0, that is, ΔUs
= U go U4 = k d.

Figure 4 shows the surface of the workpiece 20 obtained after the rough processing stage.

The method according to the invention will now be described with reference to an example.

Assume that the desired programmable fill 3 of the workpiece Z (Fig. 1111) satisfies the following conditions: 0 r = aH + b ζ where a = 10'''!, b - 50 - 10 -.

During the machining cycle, the tool l moves along the aforementioned path SK.
5.io'''''wnK and i distance HK is assumed to be reached. In order to obtain the desired surface machining surface 60 in kerosene without using machining liquid, the discharge pulse peak voltage U1=k (a @ H+ b) The constant is selected based on the 1st 8 of the Hiroki 2 diagram.

Ht-Oe)h=10"10-"as#H
4tomi15e10-'s () Let's consider the choices for the three points.

k is a constant (Kurei 2- no Mato 8), and Ut = 400V.

r W 20 G @1G-'saK vs. k = 2-
10-@V/C1l#P for Ok number 0111, Ul has the following value OIL =Osf U
s = 10 GVHl-10"1G-"s and U1 = 3
At 00VHs"1s.IG-"s, IL=400V Tool wear (311th) 0Emitionally, path 10 deviates from path 5 by I.

/-C-H ζζ, C is a constant equal to 10-''K.

Condition r=a@lI+b(a=10-” in ζζ *
For rounding to obtain the desired profile 3 that satisfies b=SO·10−@), Uml is calculated by the following formula.

UII:lIk [(a@H+b)+C@H], so H
t-Osf Ul-100VH Snow-10" 1
0-” in the past U, -120VHs”15”lo-j
s and a Us = 330V Conductive material O The device according to the invention of electrical processing is a discharge pulse generator 14Km! 9 current pulse generation WI113 (II m 1m) i) mona! o
1iJkl) 18, 14a insulation value 15
X and IIJII object 2 are connected to object 2.

It is connected to the displacement control device 17 and moved by the displacement device 16. Hiro Ekiki of this generation, and Et 18 who calculates the peak voltage U+ of the discharge pulse,
and includes what is shown as a discharge pulse peak voltage calculator 18. Information regarding UIK Line discharge pulse generator 14
is applied to the tool displacement control unit 17 (FIG. 1).

Discharge pulse peak voltage calculator 18 (Iris SM>.

The input signal H is proportional to the total displacement of the tool 10 (Fig. 1) and receives a good signal. Unit) 1840 菖2゜mso input receives l1 勺 which is proportional to the time dHK during processing. The input of Et 1801E4 receives a signal that sets the discharge pulse peak voltage. At this voltage, Profile 3! (H). Information adjusting the discharge pulse peak voltage value is applied to the discharge pulse peak voltage control x=t 19 by the enit 18. The latter is amplified, and upon receiving a control signal from the 0 demagnetization peak voltage control element 19 which converts the analog 1 applied to the input of the discharge pulse generator 14 and to the tool level control element 17 into a gage digital code, the discharge pulse is generated. Generator 14Fi generates a peak voltage U*o discharge pulse.

Discharge pulse created by generation I114 and generator 13
The current pulse (Figure 5) created by is,! (H) That is, the tool 10 is displaced by nine distances H along the path SK.
Capture the Pu A Phil 6 created by IL Ko Limk <-Ims 9 Profile 6 in correspondence to the number 〇 Kojin AL is a system that receives a control signal from Nit 17 for a displacement control A: A -= Tsu). driven by. & gills) There is also a mechanical connection between 16 and 11. The information line regarding the displacement of the tool 1 is manually input to the discharge pulse peak voltage calculation-111. The machining AlO displacement H is monitored during the machining of the workpiece 2 during the discharge peak voltage calculator 18 is ready to receive information about the displacement.
Meanwhile, it is displaced by a distance H1.

When the tool is ready to receive this information, the tool is ready to receive this information. 1 (th Am1) moves from the zero power supply for increasing H0 value along the voltage iK with the discharge pulse peak voltage equal to the current level.The gap @r between the tool l and the workpiece 2 is This means that 1 has to be moved further.

From the discharge pulse peak voltage control unit 1G (FIG. 5), the control signal is applied to the tool displacement control unit 17. This signal 0 value U satisfies the following condition O Us = kt Uv Here, kI is the discharge peak voltage υ1 is the control signal range.

This is a constant that indicates a multiple that is greater than.

A control signal (extension displacement control) 17 is applied to the voltage U, so that the voltage U is equal to UsK to form a signal Kk
z II K amplified. Therefore, Us = 01.

The tool displacement control unit 17 compares Ul and U.sup., which is a pulse peak voltage generated between the tool 1 and the workpiece 2. If Us - Us & R, a signal U1 (+H) is generated to increase the H value in order to move the unit A1 from the zero point of unit 11.

, H is below the preset level υ, so that the signal IJtt(-
H) is destroyed. U, is the machining pulse voltage, i.e. formed by the generation 1113, the current pulse and the generation 914
Even if the repetition rate of both discharges and current pulses is the same, the discharge pulse beater voltage is much more vho than the current pulse peak voltage.
The discharge pulse means to reduce the electric field in the space between the tool 1 and the workpiece 3 (1st m1), and the latter is the electric field
It can be operated by Arus. The machining pulse peak voltage is determined from the discharge pulse peak voltage. Considering that the machining pulse peak voltage U (U1, that is, the discharge pulse beater voltage) is reduced by the discharge pulse,
At the ninth point, when the electrical resistance of the gap becomes very small, U*a
It is equal to the voltage at which 18 edge breakages occur in the threshold gap between tool 1 and workpiece, and if 100% of the manufacturing odor does not move, then it becomes 1%.
/% Added Eval peak voltage Ulf is Et17 ($
1111) Set by K.

When the work Al can reach the entire distance HK, the discharge pulse peak voltage calculator forms the ready 1 signal Usd.
o This is the end of the machining cycle and machining ^1 is rearset.

The discharge pulse generator (FIG. 5) consists of a power amplifier 21 and a direct current amplifier 20. The latter has an output whose output can be connected to a power amplifier ff1lK@ and nine switching elements 28. The switching element 2140 has an input connected to the current pulse generator 13 and receives a signal from the nine-channel circuit 24 .

The discharge pulse peak voltage υ, is the condition US = k(u)
The output of the power amplifier 21 is changed to a round that satisfies the following.

This is done by changing the output pulse amount of the line switching element 2s. This quantity is inversely changed by carbonizing the supply voltage of the switching element 23. The switch tender volume 23 is supplied with an output voltage of the DC amplifier 22 which is proportional to UI. The desired duration of the discharge pulse is set by the required volume of the differentiator circuit 24. Desired discharge direction of power amplifier 21 A Rusbeak power amplifier m1. (31
Figure 16) and DC amplifier 220 voltage gain coefficient jfl
The control is influenced by the signal arriving from the discharge pulse peak voltage control 1G ($115WJ).

Figure 11 is a block diagram of the displacement control unit 17 (Figure 5). The unit 17 is connected to the current hoe-shaped tool displacement data input circuit 26 and the synchronization circuit 27, and the unit 17 is also connected to the direction control path 25 (Fig. 7) for the displacement control. It also includes a power source 28 connected to the square multiplier SS which receives the power of the power supply 30 as an input.

Tool displacement control device 17 (Fig. 5) operates as shown in Figure 5.

Tool direction control @*2S (Fig. 7) is the peak voltage U of the machining pulse, and the pulse peak voltage control 1G ($1
A control signal for driving the tool 1 is generated by comparing the discharge pulse and the preset Peter voltage U, which are applied from 15I11). These signals are input to the tool displacement data input circuit 26.
(Fig. 7) K is applied.

The control signals that set 1 tool 1 to move at the same time are synchronized! Arrive at 1. If a "ready" signal U, is applied to the circuit 2'lK from the discharge pulse peak voltage calculator 18 (FIG. 1), the circuit 27 controls the tool displacement unit 16. A control signal U, from the inter-travel periodization circuit 2γ (FIG. 7), is applied to the supply mechanism circuit 31 which in turn controls the supply mechanism circuit 31. (+H) and ILa(H)
It is driven by K.

When the process A1 makes a step ±ΔH, it produces a signal which is formed by the step moving transmitter 5soFi square multiplier 29. Output signal U1 of amplifier 29. uses the signals Uta (d Hh), Uls(-d Hh) to change the HO value.
fIh) is applied to the tool displacement data input circuit 28.

These signals are expressed as follows: If the signal U11 is squared -g29
1711) to the synchronization path 27, it is applied to the discharge pulse beater voltage calculator 18 (FIG. 5).

Discharge pulse beater voltage control unit) 18 (Fig. 5) is “
Make ready 1 compensation 4#U・, this is tool displacement ±dHh
Calculate the large discharge pulse peak voltage corresponding to K 49th synchronization - applied to road snow 'F (gy diagram)
The leap is receiving information about the first line step tool feeding mechanism 32 which forms the control signal U1 which is applied to the synchronization circuit 21.
1711) Components 1) (Figure 1)
The tool mechanism control circuit 31 receives control signals from the synchronization circuit 27 and forms the control signals for operating the step-by-step operation of the stepped tool feed mechanism 32. The square amplifier 89 receives the signal 9
Connected to electric Tsuta 840 output and round amplification -ss (gall)
From 1 to O step movement transmission @SO, tool displacement K
The voltage of the signal υ11 carrying the information to
O applied to the amplifier 330 where current amplification takes place
The amplified signal is output from the 0-signal output which is applied to the limiter 84 which adjusts the signal 4#O amplification degree and voltage.
If a good signal is applied in this way, three synchronization circuits (Figure 1)
K applied O circuit element 36 (2μND) Kli wired inverter 8
5<In diagram) 27 O synchronization circuits are constructed, and the cost is 40 (2μND), and 0 human power is installed. Just input $9 (20R)! The two − connected to the i force.
m* element 37,5s (s4ND) included 〇Tool direction control circuit 25 (Figure 7) to logic 5IJ11 element 3
8 (3μND) (Figure 9) is applied to the input of 9F4, 10 @ production setting compensation code Uu (+H) or U, word -H)
exists, similarly there is a speed control signal from the computer 1B (jl!l!l), and there is no control signal U1 from the data input circuit 26 (FIG. 71), the logical logic is A signal U1·(+H) is present at the output of element all (Fig. 118). ζ′D II *Us·(+H) is applied to the U supply mechanism control circuit 31. When the tool 1 deviates from the distance mentioned above, the signal Ult is sent to the step movement transmitter 30 (11
logic element 4G (W
AND) (turtle 1111) applied to 0 points m * element 1G (
20R) With the signal arriving from the 0 output and the note arriving from the square amplification aSS, the signal UII is the logic prime number G (
2dD) generated at the output of
C is applied.

The tool displacement data human power circuit 26 has two logical elements, 4 spirits, 4
8(!muND)K connected, signal pulse generation 164
1 (101i1).

The input signal of tool displacement data is logical im * prime 42.43 (W
K is applied to the computer 18 (Fig. 315) from the output of 0 (AND) ◎Logic element 4143 (I AND
) 0 human force applied to the tool displacement signal and the logic element from the single pulse generator 41 42.43<2 mND) 0110
Human power is created by 'IIa, 9 paths, 0 exist, and logical element 4
A single pulse generator 41 with one output of 1,480 outputs is connected to the synchronization circuit 27 (FIG. 7).
A signal is formed at the output of 0 (2AND) (Fig. 9) and an output signal is output at 9. The output signal of the single signal pulse generator 41 is
% Before the tool 1 is worn, the oil pressure applied to the input of the 1 inverter 5s (JLE diagram) is calculated to prohibit the displacement of the tool 1, and information regarding other displacements of the tool 1 is input to the data input circuit 26 (No. 7), the computer 18 sends a signal to the synchronization circuit 27 for another data person. The nine pulse duration produced by the single pulse generator 41 is greater than the data repetition time of the calculator 18.

Single pulse generator with two inverters 44.45N11
Figure 1). Inverter 450 output company-m*
It is connected to the input of element 46 (2AND). The output of nine logic elements 47 (2
NAND) is also available.

Single pulse generation m41 is also logic element 4@(2NAND)
Jllll leader wire connected to the output of
7 (2NAND) (D input also has a diode 410
◇ When the input of the inverter 4s is not present, the inverter 4
When a signal is generated manually by the V%0 inverter 456, the output signal of the inverter 44 is generated. This output signal period is the input signal period, capacitance 4
It is determined by the capacitance value of 8 and the resistance value of resistor 50. Diode 49 is used for discharging capacitor 48 at input signal 0JII.
o alet S, which is a boot stock (WA), is connected to a reference voltage source 52 and a scale amplification *5srpc to constitute a nine voltage source s1 (12th garden). 54m2s is even more soft circuit! 14. Ils, the output of which is connected to the output of the 0 comparator-route ss integrator circuit s7, which is connected to the logic ml path saK and has a large input, is the internal signal U (10H) and Ull (-11 ) Al1 No. U8. and Ul to the specific IMa tract 4. Sm to vsyssso input p
The zero compensation sign 1 applied to c means that the pulse peak voltage υ applied by the tool 1 to the workpiece 2 is equal to the discharge pulse peak voltage υm. Signal U! m is U, which is a low preset threshold value of the machining pulse peak voltage, and hereinafter means n. The signal Use applies a voltage U- from the machine A1 and the workpiece 2 to the comparator circuit 55 via the integrating circuit 57, and the scale 5 amplification 55! By applying a control voltage from the control unit 19 (FIG. 5) via the K.

The signal Us is formed at the input of the scale increase @563 (1m12 figure) oUs is calculated by the calculator 18 (jI5 figure) K is equal to 900 million UIK 0 IJtt is, if U is less than test,
A comparison circuit 540 output is formed.

U, 1IIJ is O formed by the reference voltage @52WC
It consists of a logic circuit 66F1 inverter 58 (1st JIII) and a logic circuit 59 (2AND) whose input is connected to the output of the inverter 58.

Signal U! The signal Uf1 is applied to the input of the logic element 59 (2AND), and the signal Uf1 is applied to the input of the logic element 59 (2AND).
) Forms Ill Us・(+H) at O output ◇ Signal U
ts(H) is formed at the output of inverter ss.

Configuring the Senden Pulse Peak Voltage Control ET 1G (Fig. 5) and the Hiro Digital Analog Converter 41G (Fig. 14),
Its output is the input Kl! of scale amplifier 61! II-! The digital code information sent from the calculation 111111 to the input of the digital-to-analog converter 6° is converted into a signal proportional to the digital code value. This signal O voltage and electric m
The a-scale amplification 1161 converts the input value −IU・
is increased to an OK sufficient level to control the applied discharge pulse generator 14.

7 is a time chart illustrating the operation of the first SSI loop synchronization circuit 27 (Figure 7).

When there is an output K "ready code U @ Ka 6") of the computer I II (Figure 1111) and an output KUI @ (+H) signal of the computer 88825 (Figure IE'1), that is, at 41 hours, U,
This signal is applied to the control circuit 31 of the flow supply mechanism, where the magnetic compensation is formed at the end of the mechanical AXO displacement. After a 1ΔH tool step, a % Um signal is formed at the output of square amplifier 29.9. 〇 signal U applied to the synchronization circuit 27 (time snow)
It is discontinuous with na shin I U1 Lu-Usma. Control signal U
, · are formed by the data input circuit 26 and form a signal for data input regarding the current displacement of the synchronizing circuit 7.

The nine pulses sent from the square amplification signal 9 end at time t.

U,・e U, -The period of the signal is momentum. Both signals end at time t. This means that these periods are calculated by Calculator 18 (5th
This means that the data processing time in Figure) is longer. t
w indicates data contemplation time. Data input signal ILL (time t@) Oms-t', 'V f 4 '' signal Us
is formed.

At time t4, the control circuit 2s shifts the tool l to −ΔH displacement〇9K
Ninth, this will form the IJta signal for -H displacement of machining Am. The tool 10 operation involves inputting data regarding the displacement and inputting the data for a given displacement H of tool 1.
Calculator 18 that corresponds to K and calculates the Maruzenden pulse beater voltage
In synchronization with the data J6 thought, the invented method of electrical discharge machining of conductive materials can be extended to all technologically possible ranges of electrical discharge machining, and can form cavities with infinitely variable shapes. enable. The method of the invention also reduces the deleterious effects caused by tool wear and improves the quality of the finished part. The decreasing zero-circle method allows the production of single-bus punching dies, so that one value part and the hole are made simultaneously.

The method of this invention enables automation of electrical discharge machining, increasing the efficiency of this process. In this way, the product can be quickly changed over into different formats. Ultimately, this method results in a highly homogeneous surface and high precision.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the tool and workpiece during machining according to the invention. FIG. 2 is a graph of breakdown voltage versus gap width. FIG. 3 is a schematic diagram of the workpiece and tool due to wear during the machining course. FIG. 4 is a schematic illustration of a tool and workpiece with a machining cycle consisting of several stages. FIG. 5 is a block diagram of an electrical discharge machining apparatus for electrically conductive materials according to the present invention. FIG. 6 is a brick diagram of a discharge pulse generator according to the invention. FIG. 7 is a brick diagram of a tool displacement control unit according to the invention. FIG. 8 is a block diagram of a square amplifier according to the invention. FIG. 9 is a block diagram of a synchronization circuit based on this output. FIG. 10 is a block diagram of a displacement data input circuit according to the present invention. Figure 11 is a block diagram of a single pulse generator according to the present invention. Figure 12 is a plotter diagram of the directional control unit according to the present invention. Figure 13 is a theory based on this invention! FIG. 1 is a block diagram of one circuit. Figure 14 shows the discharge according to the present invention/(Rusbeek electric 2...
- Workpiece 3 - Obtained workpiece profile 4... Tool O machining table both 5... Machining of machine O Predetermined path 6 - Workpiece O fabricated surface 7 - ...Relationship between dielectric breakdown voltage OV* and machining in oil and machining using ultrasonic waves, gap width r between workpiece 2 and O gap 8.-Same relationship when ultrasonic waves are used '&- −・・・
Relationship 10 as above in the case of floating aluminum powder without using ultrasonic waves... Tool machining surface path 11 caused by tool wear
-Glofill shape 12--Rough machining R# profile 13-0. Current pulse generator 14...Discharge pulse generator 15...Insulation unit 16...Tool displacement unit 17...Work odor position control unit 18...Discharge pulse peak voltage calculator 19-Discharge A Rusbeak voltage Control unit zG--DC voltage source 21--Power amplifier 22--DC amplifier 23--Switching element 24--Differentiating circuit 25--Tool direction control unit 26--Tool displacement data input circuit 27-- ...Synchronization circuit 2B...Power output 29...Square amplifier 30...Step movement transmitter 31...Supply side control circuit 32...Step E^ supply mechanism 33...Amplifier 34... Signal limiter 35...-Inverter 36--Logic l1lI element! AND 3 ---# @MuND38-#
3mmND 39-1! 0R 40-12mm ND 41-...Fast pass generation 42-Wheel height 2mm ND 4g-12,mu ND 44...Inverter 45...Inverter 4...Ronho Tatami element 2 NAND 47・-#! HAND 48 - Capacitance 49 - Diode SO - Resistor 61 - Power source SZ - Reference voltage 5S - Scale amplifier 54 - Ratio 11R11 path SS - 56 - 5 logic circuits - Integration Connection 58...Inverter 59-Wheel load element 2AND 60-Digital analog converter 61...Scale increaser Ili device Patent applicant's agent Patent attorney Yori-Sueo (one person) fll, 2 fEJ 屓4 ( Continuation of fE75 '-107- Author: Zorzh Adamovitch Mrochek, Soviet Union Minsk Uritsutsa Vostochnaya 30 Kwarchila 65 Author Ivan Alekseevytchy Pact Soviet Union Minsk Uritsutsa M Gorkogo 78 Kwarchila 484 Author Vasily・Ivanovitch Turkhanovitch Soviet Union Minsk Ulitsya Yar Kolasa 30 Kwarchila 8

Claims (1)

[Claims] 1. A conductive material for applying a current pulse and a discharge pulse having a control Peter voltage to an electric circuit between a tool and a workpiece, characterized in that the discharge pulse peak voltage is derived by the following equation: Electrical discharge machining method U1=kq(H) Here, U1 is the discharge pulse repeater voltage, and k is the voltage and gap width at which absolute breakdown occurs in the gap between the machining course intermediate A (1) and the workpiece (2). ) is the proportionality constant that determines the relationship between ? The value of H is adjusted to the desired 011 of the machining surface of the tool (1), and the two-fill of the rounded machining III box obtained so that the tool ω is displaced is a function. 2 Tools #IMKarisu (Hole) A patent characterized in that it is compensated by increasing the peak voltage of the discharge pulse - Kyoto Noriku ■lll O method described in paragraph 11, ψ (H) company O wheat level H during discharge It is a function that depicts the predominance of the machining surface (4) of the tool a) from the desired O-contact (5) due to the wear of the tool (1) related to 3.2&, which consists of a rough machining stage and a finishing stage. Claim 1 characterized in that the discharge pulse peak voltage at the finishing stage is greater than the discharge pulse peak voltage at the rough machining stage by a value proportional to the finishing machining offset (t!-). Method 4 described in Section 1, Nit (ZS) to calculate the discharge pulse peak voltage
, all inputs of the enit receive a signal proportional to the total displacement of the second . 3rd person is processing O-worker AO
Receiving a good signal proportional to the displacement, the fourth human power receives a signal to set the discharge pulse peak voltage, and as a result, the lI! of the workpiece (2)! ■Profile (3) follows v (H)
17) is connected to the electric circuit between the workpieces and the displacement tool (16) is connected to the discharge pulse peak voltage calculator (18) 11. Also connected to the discharge pulse beater voltage control (19) Discharge pulse generation II (14) Kll is connected to a current pulse generator via an insulating wire, and the tool and workpiece are connected to the electrical discharge pulse generator. A discharge pulse generator (14) is connected to a discharge pulse peak voltage control device (19) and a discharge pulse generator (19) is connected to a discharge pulse generator (19) to perform electrical discharge machining of a highly conductive material in which the tool is kinematically related to a feeding mechanism. Amplifier (m
) to 10, said Etsu) (19) is connected to the DC voltage source (1)), and the output is connected to the input of the switching element (23), which is connected to the output of the differentiating circuit (24). , the input of the differentiating circuit (24) is connected to a current pulse generator (13), and the output of the switching element (2) is connected to a DC power supply (2o) and isolated via a power amplifier having nine power points. (17) is connected to the power supply (Ls);
It includes a tool-workpiece electric circuit, a direction control circuit (2s) connected to an electric II (m) and a synchronization circuit (mushroom) K, and a synchronization circuit KI [甖and a feed mechanism control circuit (sl) and a synchronization circuit (Kli); a tool movement transmitter kinematically associated with the step feed mechanism; a tool orientation control circuit (sl) and a synchronization circuit (27);
A patent characterized in that the data input circuit (216) is connected to a discharge pulse peak voltage calculator (18) and has nine outputs. Scope of Requirement The device 7 described in item 4, the tool meat' control circuit (25) is the workpiece (2) KI
Large power supply (sl), reference voltage II (recommendation 1 comparison circuit (64), happy 2 ratio 12 times II (audience), logic circuit (store). School increaser (sl) and integral It consists of a logic circuit (sl), the logic circuit (M) OII 1 input is connected to the comparison circuit <U>O output of the logic circuit <SS>O, and the logic circuit <SS>O second input is connected to the second comparison circuit (5). connected to the output and the first
Comparison circuit (&4)! 11 Human power is tools and integral - road (5
7) The 0 output is connected to the integration circuit (17) and the scale amplifier (53). I
II, jI110 comparison - road < u) 082 manpower #11
& quasi-voltage source O output KII is connected, and the logic i + gn path (
The output of 56) is connected to the tool displacement control unit) (17) 0 mm displacement data input circuit (seismic), and the school increase @
II ($8) is the deceptive pulse peak voltage control) (
1.) The device according to claim 6, characterized in that it has an O output K11ll and has a power of nine people.