WO1991012918A1 - Procede de finissage electrolytique - Google Patents
Procede de finissage electrolytique Download PDFInfo
- Publication number
- WO1991012918A1 WO1991012918A1 PCT/JP1991/000264 JP9100264W WO9112918A1 WO 1991012918 A1 WO1991012918 A1 WO 1991012918A1 JP 9100264 W JP9100264 W JP 9100264W WO 9112918 A1 WO9112918 A1 WO 9112918A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- workpiece
- machining
- electrolytic
- work
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
- B23H3/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits
Definitions
- the present invention relates to an electrolytic finishing method, and more particularly, to an electrolytic finishing method capable of finishing a surface to be processed with high precision and obtaining a flat glossy surface.
- the electrode used in electrical discharge machining is used as it is.
- an arc is generated at the position closest to the lightning pole and the workpiece, so that the surface of the electrode sometimes has irregularities reaching several tens ⁇ .
- the irregularities exceed 20 tfm, if the irregularities on the electrode surface have a wavy pitch of less than 0.
- the equipotential surface theoretically obtained from the entire surface of the pole is ⁇ and the effect of the electrode surface does not appear on the finished surface after processing.
- the pitch of the undulations is 0.3 mm or more, the irregularities on the electrode surface may have the same processing gap of about 0.1 mm. The inconvenience of being transcribed occurred.
- the lightning pole and the workpiece are opposed to each other, and the bracket is controlled so as to relatively vibrate or reciprocate.
- the contents are the same as (b), but the stroke of the reciprocating system is usually set to a small range of about 0.1 to 1 mm.
- the present invention provides an electrode finishing method for electrolytic finishing to solve the above-mentioned disadvantages. It is an object of the present invention to provide an electrolytic processing method which can be used quickly when the surface is rough and has a significant effect. Invention opening
- the present invention provides a process in which an electrode is moved in a horizontal plane based on an input set value to bring a pack electrode closer to a processing surface of a workpiece, and a lightning solution is discharged in a processing tank.
- FIG. 1 shows an embodiment of the invention of the present application.
- FIG. 1 is a conceptual explanatory view of a finishing machine for leaching a stone, which can carry out the present invention.
- FIG. 2 is an explanatory view of a configuration of a control device
- FIG. (A) is an explanatory diagram showing the positional relationship of the machined surface
- (b), (o), and (d) are explanatory diagrams showing the positional relationship between the electrode and the workpiece, respectively.
- Fig. 4 is an explanatory view showing the surface of the workpiece.
- (A) is the surface of the electrode used for lightning discharge
- (b) is the surface of the workpiece that has been subjected to electrical discharge machining
- (o) is the solution.
- id) is an explanatory diagram showing the surface of the workpiece when the present invention is carried out. Best mode for carrying out the invention
- an electrolytic finishing machine 1 that can actually satiate the invention is an electrode fixing device 3 for fixing an electrode 2, a workpiece fixing device for fixing a workpiece 4, and a rotary motion of a pulse motor 6. It consists of a pick-up unit 9 that moves up and down the electrode fixing device 3 by supplying air from the air supply unit 8, a DC power supply unit 10, and a charging / discharging unit 11. Power supply device that generates machining pulse] 2, Motor drive control unit 13 and machining condition control Control device consisting of 14 and electrolyte flow control unit 15 etc. 16. Various types of work 4 An input device for inputting data such as a chip 17.
- the electrode fixing device 3 has an electrode 2 made of, for example, pure or graphite, and a lightning pole surface 2 a and a work surface of a work 4 at the lower end of a rod 22 provided thereunder. 4a is fixed so as to maintain a uniform gap 19 in the three-dimensional direction.
- the pulse motor 6 is rotated by a control signal of the motor driving control unit 13, and the rotation is converted into a vertical motion by an active conversion device 7 to move up and down.
- the air supply device 8 is operated by the control signal of the drive control unit 3, and air is supplied into the pick unit 9 to move up and down.
- the active method of the electrode fixing device 3 is performed by using one or both of the pulse motor 6 and the air supply device 8 according to the processing conditions and the like.
- the workpiece fixing device 5 is a highly insulated graphite or ceramic table, and on its upper surface, for example, a set jig, a screw, etc., which does not show the workpiece 4 which has been subjected to lightning and lightning. Fix with.
- the electric lever fixing device 3 supporting the electrode 2, the pulse motor 6, the motion conversion unit 7, and the like are mounted on a frame (not shown) constituting the electrolytic finishing device 1 through XY tapes.
- the X-axis motor and the Y-axis motor are configured so that the workpiece 4 can be controlled to move on the X- ⁇ plane, that is, on the horizontal plane, by a command from the motor drive control unit 13. .
- FIG. 2 shows the control device 16 in another form. That is, the arithmetic unit 23 receives the data such as various ties associated with the workpiece 4 input from the input device 17 and stores the received data in the storage device 24 and causes the display / warning device 25 to display it. .
- the arithmetic unit 23 reads out necessary data from the storage unit 24 and performs necessary processing according to a control program or a signal from the sensor 26, and executes the pulse motor 6 or X- ⁇ Each motor that moves the thousand balls.
- the air supply device 8. and the output device group 27 such as the electrolytic solution filtering device 20 are controlled as specified.
- This centering is performed in the following manner. For example, when the automatic position is turned on, the pulse motor 6 rotates, the lightning pole 2 descends and comes into contact with the workpiece 4, and this contact is detected by the sensor 26, and the position is determined as the processing origin (Z axis). Is stored in the storage device 24. Next, raise the electrode 2 slightly from this machining origin (Z axis) and move the electrode 2 in the direction of the X axis + (positive) to detect contact with the workpiece 4. When contact is detected again by moving the negative electrode 2 in the ("minus") direction, the movement during that time is calculated, and the intermediate position is set as the machining origin (X-axis). Then, the processing origin (Y-axis) is calculated, and these values are stored in the storage device 24, and the centering is completed.
- a pump or the like (not shown) of the electrolytic solution filtering device 20 is operated to supply the electrolytic solution into the processing tank 21.
- the electrolytic solution reaches a predetermined depth, the electrolytic solution is distributed to the processing tank 21.
- the killed liquid level meter (not shown) operates to output a liquid level detection signal to the arithmetic unit 23.
- this signal or a signal indicating that the operator pressed the stop button of the input device 17 is input, the arithmetic unit 23 stops the automatic operation and allows the electrode 2 to move up and down manually.
- the operator presses the up button, and moves the electrode 2 to a predetermined position, that is, a position where the jet of the electrolyte supplied to the squadron 19 spreads all over the gap 19 without being hindered by the electrode 2. To raise.
- the arithmetic unit 23 stores the current position of the electrode 2, that is, the upper limit position, and the compressing electrode 2 is automatically lowered and the input device is lowered.
- the electrode 2 is set at a position where the predetermined gap 19 inputted by the step 17 is maintained between the work 4 and the work surface 4 a of the work 4.
- the electrode 2 is set, check that the electrolyte in the processing tank 21 is at a certain level, and if the level is higher than the specified level, simply raise the compressing electrode 2 to fill the gap 19. Carry out cleaning by spraying fresh electrolyte.
- a predetermined peak current density for improving the surface roughness according to the processing area of the processing surface 4a of the workpiece 4 for example, A single processing pulse of 5 to 70 AZ cm 2 (density of 5 to 70 AZ cm 2 ) is supplied between the electrode 2 and the workpiece 4.
- the arithmetic unit 23 raises the oscillating pole 2 to the stored upper limit position, and activates the jet nozzle 8 almost simultaneously with the rise of the electrode 2.
- the jet of electrolyte is supplied to the gap 19.
- the raising of the electrode 2 is performed simultaneously by the rotation 15 of the pulse motor 6 and the supply of air by the air supply device 8.
- processing dust such as the compressed product generated in the gap between the lightning pole 2 and the workpiece 4] 9 is removed from the gap 19.
- the mining device 23 outputs a control signal to the pulse motor 6 and the air supply device 8 until the number of times of processing input by the child input device 17 is reached. Then, the electrode 2 is lowered and raised by removing air from the pick unit 9.
- the workpiece 2 usually only needs to repeat the movement in the Z-axis direction (vertical direction) at the machining origin (X-axis, Y-axis) (FIG. 3 (b)). If the surface of 2 is rough, there is a disadvantage that the rough surface shape is directly transferred to the processed surface 4a of the workpiece 4.
- the electrode position is controlled as follows. That is, as shown in Fig. 3, after lowering the pole 2 once at the machining origin (X-axis, Y-axis), the direction orthogonal to the Z-axis (X-Y plane), for example, the X-axis + (plus) direction
- the furnace pole 2 is then moved to the machining origin (X-axis). , Y-axis) to; X-axis minus f minus) direction. That is, electrode 2
- control is performed so as to sequentially switch the direction in which the trajectory is moved in the order of the minus ( ⁇ ) direction of the Y axis and the plus (+) direction of the X axis.
- the surfaces A and B are strongly processed to increase the gloss, the surface C has fewer processing children, and the processing chips are more likely to adhere, and the surfaces D and E Is the average processing 3 ⁇ 4 in the middle.
- the B and C planes are strong, the A plane is small, and the D and E planes are intermediate. If the direction of electrode movement is switched in the order of I, II, IIT, and IV shown in Fig. 3 (a) (1 ⁇ 3. ⁇ ), Processing is performed evenly on each part.
- the distance between the electrode 2 and the work surface 4a] 9 is set so that the position from the preset machining origin (X-axis, Y-axis) should not be less than 0.05 mm in any part (surface).
- the movement S is calculated by the arithmetic unit 23 and stored in the storage unit 24 for control.
- a cubic electrode is used for convenience, so movement in the Z-axis direction is required, but the case is exactly the same.
- this moving child is also related to the roughness of the electrode surface described above.
- the irregularities on the pole surface are wavy with a pitch of 0.5 mm, for example, if the electrode is moved relative to the workpiece at a smaller pitch, the effects of the irregularities will be Will be reduced. Therefore, the movement difficulty in the X-axis direction and the Y-axis direction is within the range of 0.1 to 0.3 mm, and by controlling in consideration of the surface roughness of the pole 2, the surface roughness can be transferred without being transferred. Can be finished.
- the arithmetic unit 23 will calculate the electrode corresponding to 1 ⁇ 2 of the unevenness pitch.
- the number of repetitive machining (machining S) is calculated according to the movement / separation and the surface roughness of 2, and based on this, the motor is controlled in a fluctuating manner, and an extremely smooth surface to be machined can be obtained. That is, as shown in Fig. 4, when the surface of the workpiece obtained by electric discharge machining is Rmax: 60 y3 ⁇ 4m (b), and the electrode is also the electrode surface of Rmax: 44 ⁇ (a).
- the present invention shows a corresponding effect regardless of current value control. Also, in consideration of the present invention and other current value control or the shape of the surface to be processed and the direction of the H-convex on the electrode surface, the amount of movement of the electrode is controlled to be different between the X-axis direction and the direction. If this is the case, a highly accurate finished surface can be obtained.
- the present invention has the following effects by the configuration described above.
- the position of the electrode can be controlled without the hassle of switching the polarity of the electrical connection, and the inconvenience of transferring the rough state of the electrode surface to the workpiece surface is reliably avoided.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910701498A KR940002875B1 (ko) | 1990-03-01 | 1991-02-28 | 전해다듬질 가공방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2/50686 | 1990-03-01 | ||
JP2050686A JPH03251315A (ja) | 1990-03-01 | 1990-03-01 | 電解仕上げ加工における電極位置制御方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991012918A1 true WO1991012918A1 (fr) | 1991-09-05 |
Family
ID=12865808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1991/000264 WO1991012918A1 (fr) | 1990-03-01 | 1991-02-28 | Procede de finissage electrolytique |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0471086A4 (ja) |
JP (1) | JPH03251315A (ja) |
KR (1) | KR940002875B1 (ja) |
CA (1) | CA2053905A1 (ja) |
WO (1) | WO1991012918A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2786826B1 (de) * | 2013-04-03 | 2018-02-28 | MTU Aero Engines AG | Elektrochemisches Bearbeitungsverfahren zur Herstellung von Ausnehmungen mit und ohne Hinterschneidungen |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6115958B2 (ja) * | 1981-01-20 | 1986-04-26 | Inoue Japax Res | |
JPH01252317A (ja) * | 1988-03-31 | 1989-10-09 | Shizuoka Seiki Co Ltd | 電解仕上げ加工方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB933731A (en) * | 1961-01-31 | 1963-08-14 | Rolls Royce | Improvements relating to the electrolytic removal of metal |
BE634498A (ja) * | 1963-06-19 | |||
JPS58120427A (ja) * | 1982-01-06 | 1983-07-18 | Inoue Japax Res Inc | 放電加工装置 |
JPH01257520A (ja) * | 1988-04-08 | 1989-10-13 | Shizuoka Seiki Co Ltd | 電解仕上げ加工方法 |
EP0376581B1 (en) * | 1988-12-26 | 1992-09-09 | Shizuoka Seiki Co. Ltd. | Electrolytic finishing method |
-
1990
- 1990-03-01 JP JP2050686A patent/JPH03251315A/ja active Pending
-
1991
- 1991-02-28 KR KR1019910701498A patent/KR940002875B1/ko active IP Right Grant
- 1991-02-28 WO PCT/JP1991/000264 patent/WO1991012918A1/ja not_active Application Discontinuation
- 1991-02-28 CA CA002053905A patent/CA2053905A1/en not_active Abandoned
- 1991-02-28 EP EP19910904806 patent/EP0471086A4/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6115958B2 (ja) * | 1981-01-20 | 1986-04-26 | Inoue Japax Res | |
JPH01252317A (ja) * | 1988-03-31 | 1989-10-09 | Shizuoka Seiki Co Ltd | 電解仕上げ加工方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0471086A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP0471086A1 (en) | 1992-02-19 |
EP0471086A4 (en) | 1992-12-09 |
KR940002875B1 (ko) | 1994-04-06 |
KR920700828A (ko) | 1992-08-10 |
CA2053905A1 (en) | 1991-09-02 |
JPH03251315A (ja) | 1991-11-08 |
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