CN1033357A - Method and device for improving surface quality of machined part - Google Patents
Method and device for improving surface quality of machined part Download PDFInfo
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- CN1033357A CN1033357A CN 87101457 CN87101457A CN1033357A CN 1033357 A CN1033357 A CN 1033357A CN 87101457 CN87101457 CN 87101457 CN 87101457 A CN87101457 A CN 87101457A CN 1033357 A CN1033357 A CN 1033357A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000002441 reversible effect Effects 0.000 claims abstract description 6
- 208000006011 Stroke Diseases 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
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- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The invention is suitable for processing parts with high surface quality requirements, and is particularly suitable for processing parts with complex shapes. The method comprises the following steps: the feeding amount of single processing is smaller than the radius of the electrode wire, and the length of forward wire running is larger than that of reverse wire running in the processing. So that the full length of the wire electrode uniformly participates in the work in the strip-free processing. The device for realizing the method comprises the following steps: 1. mechanical relay control device 2, digital control device 3 and timing circuit. Under the condition of meeting the requirement of production efficiency, the strip-free machining is realized, the surface quality of the machined part is improved, the structure is simple, and the work is reliable.
Description
Be applicable to the part of the high usefulness of surperficial quality requirement being walked fast silk cutting machine tool processing, be specially adapted to of the processing of this lathe the part of various complicated shapes.
Owing to walk silk cutting machine tool in process fast, wire electrode moves reciprocatingly, whenever make a round trip and just form a pair of striped up and down, and the fringe phenomena that forms of finished surface as shown in Figure 1, thus reduced the surface quality of part to be processed.Still the way of not having head it off at present both at home and abroad.
The method and apparatus that the present invention proposes has solved the problems referred to above effectively, guarantees that under the production efficiency condition with higher, fringe phenomena does not appear in the surface of part to be processed.
Fig. 1 is the fringe phenomena that the part to be processed surface forms,
Fig. 2 is machinery-relay control device,
Fig. 2 a is the mechanical part structural representation,
Among the figure: 1, silk tube, 8, the collision block I of moving about once,
2, motor, 9, the secondary collision block that moves about,
3, secondary motor, 10, support,
4, secondary ram, 11, the secondary stroke switch S
2-1,
5, the collision block II of once moving about, 12, slide plate,
6, travel switch S
1-1, 13, the secondary stroke switch S
2-2
7, travel switch S
1-2,
Fig. 2 b is Principle of Electric Engine figure of relay control,
Among the figure: J
1Be relay, S
1-1, S
1-2Be the one stroke switch,
Fig. 2 c is relay control secondary Principle of Electric Engine figure,
Among the figure: J
2Be relay, S
2-1, S
2-2Be the secondary stroke switch,
Fig. 3 is numerical control device control principle figure,
Fig. 4 is timing circuit control principle figure.
The piece surface condition diagram that Fig. 5 processes with the present invention.
The method that the present invention deals with problems is: great many of experiments repeats to have confirmed following result: in process, when the processing amount of feeding of single was not more than the radius of wire electrode, fringe phenomena (being that chequered with black and white striped disappears at processing parts) did not appear in the treatment of surfaces of components. But satisfying under the condition of certain productivity ratio, the length of general employed wire electrode can be above 30～60 meters.
In process, wire electrode each in back and forth toward (or multiple) time lathe the processing amount of feeding be called feed in every single processing.Single is processed the length L and the thickness of workpiece H of required wire electrode, and productivity ratio γ, the amount of feeding (when striped not occurring) are the radius of wire electrode for R(R), K is relevant with wire electrode silk speed,
Process velocity V=(γ)/(H) millimeter/minute=(γ)/(60H) mm/second
Single t process time when the processing amount of feeding is R
0=(R)/(V) second
t
0＝
Second=(60RH)/(γ) second,
Single is processed required wire electrode length L=Kt
0Rice=(60KHR)/(γ) rice,
When processing throughput γ=40 millimeter
2/ minute, wire electrode diameter R equals 0.08 millimeter, wire electrode silk speed K=9 meter per second, and when thickness of workpiece is 28～56 millimeters,
Calculate to such an extent that single processing filament length degree L is 30～60 meters,
Owing to use 30～60 meters these segment electrode silks repeatedly, its loss will be very serious, and the diameter of wire electrode will diminish rapidly, and intensity also obviously reduces, and influence the dimensional accuracy of processing parts significantly.
The present invention proposes a kind of method: work in-process, use the total length of wire electrode equably, one by one, to reduce the loss of wire electrode, make processing reliable and stable, to improve the quality of the treatment of surfaces of components.
With total length is that 300 meters wire electrode is an example, and each reciprocating motion of wire electrode is 30～40 meters long, and its process of working is as follows: (annotate: the silk tube just (instead) go to just be abbreviated as (instead) and going to).
From left to right:
From right to left:
Like this, the employed wire electrode length of each reciprocating motion is 30M and 32M, satisfy work piece surface and do not produced the requirement of striped, and in whole process, used whole wire electrodes equably, one by one, satisfied the condition that reduces the wire electrode loss simultaneously.
The device of realizing said method has following three classes:
1, machinery-relay control device:
By mechanical part, travel switch, move about collision block and relevant relay circuit are formed.
1) mechanical part: see Fig. 2 a:
By silk tube (1), a motor (2), secondary motor (3), secondary ram (4), once move about collision block II (5), travel switch S
1-1(6) and S
1-2(7), once move about collision block I (8), secondary move about collision block (9), support (10), secondary stroke switch S
2-1(11), slide plate (12), secondary stroke switch S
2-2(13) form.
The collision block position one-time mechanical that moves about is controlled, and has controlled the employed wire electrode length of each reciprocating motion.
The collision block position secondary mechanical of moving about control, by the relative position of collision block with the silk tube that move about, it is in running order to have determined the silk tube to go up certain partial electrode silk.By slowing down,, make wire electrode equably, little by little work by of the relative motion of secondary Electric Machine Control secondary ram with respect to slide plate.Determined wire electrode to participate in the total length of whole process by the move about distance of collision block (9) and secondary stroke switch room of secondary.Make motor commutation by relay, all wire electrode enters duty circularly.
Concrete course of action is as follows:
Shown in Fig. 2 a:
A motor (2) rotation, drive silk tube (1) rotation, by guide rail mechanism drive secondary ram (4) and on the collision block that moves about (5), (8) and slide plate (12) mobile from left to right with respect to support (10), collision block I (8) is bumped travel switch S when once moving about
1-2(7) time, shown in Fig. 2 b, relay J
1Adhesive, normally-closed contact J
1-2, J
1-3Disconnect normally opened contact J
1-2, J
1-3Close, a motor (2) counter-rotating drives silk tube (1) counter-rotating, secondary ram (4) and on the collision block that moves about (5), (8) and slide plate (12) mobile from right to left, when the collision block that once moves about (5) bumps S
1-1(6) time, J
1Discharge, a motor (2) commutation, the processing feed motion is finished one back and forth, and its stroke has determined the length that single is participated in the wire electrode of processing.
By Fig. 2 a and Fig. 2 c: secondary motor (3) rotation by screw-nut body drive ram (4) with respect to slide plate (12) by moving right left, also move together travel switch (5) on the ram (4), (8), make the wire electrode of working partly equably, little by little conversion from left to right, when giving fixed limiting length, the secondary collision block (9) that moves about bumps the secondary stroke switch S
2-2(13), relay J
2Adhesive, normally-closed contact J
2-2, J
2-3Open normally opened contact J
2-2, J
2-3Close, secondary motor (3) counter-rotating, move from right to left relative to slide plate (12) ram (4) and upper stroke switch (5) thereof, (8), and the motor silk of promptly at every turn working is also changed from right to left equably, when the secondary collision block (9) that moves about bumps travel switch S
2-1(11) time, motor (3) counter-rotating, all wire electrode is worked and has been finished a circulation, so periodic duty.
2, calculation control device: utilize the digit pulse technology, the rotation amount of silk tube is become digital quantity with D conversion method.The silk tube rotates a circle and sends pulse 1, is+1 clockwise, is-1 counterclockwise, by a cover digital control circuit, and control wire length.
Its principle is as follows:
If: all the wire electrode on the silk tube is the A circle, and the wire electrode number of turns that meets no striped processing is the n circle, and as shown in Figure 3, state of a control is:
(1) clockwise turn to n circle back oppositely, the suitable wire electrode of 1 circle is about 0.5M,
(2) be rotated counterclockwise to reverse again behind the n-4 circle, like this, promptly along be moved to the left with respect to silk tube position repeatedly at every turn, after n circle wire electrode moved to left extreme position, state of a control promptly changed in the processing district of n circle:
1. turn is that n circle back is reverse counterclockwise,
2. clockwise turn to n-4 circle back oppositely,
N circle wire electrode is along with moving right with respect to silk tube position repeatedly at every turn like this, encloses wire electrode to n and moves to right behind the extreme position, and state of a control changes direction again, and reciprocation cycle can meet the demands.
3, time-controlling arrangement:
Because the wire cylinder motor rotating speed is constant, the counting of n circle can be converted into regular hour t among Fig. 3.
As the rotational time corresponding to the n circle is t
1, (n-4) the circle rotational time is t
2, adopt typical timing circuit to meet the demands.
Referring to Fig. 4:
To import the time in the single-chip microcomputer by the dial-up dish, it is output as the motor steering control signal, and commutation signal is that 0 o'clock corresponding motor just changes; Commutation signal is corresponding motor counter-rotating in 1 o'clock, the once corresponding dial-up dish of the every commutation of motor has been dialled a numeral, the time of the corresponding silk tube of the numeral of dial-up rotation, the promptly corresponding wire electrode number of turns that realizes no striped processing, and the time that makes counter-rotating, the number of turns of then not having striped machined electrode silk was towards moving corresponding to positive veer, until extreme position less than the time of just changeing, oppositely move to another extreme position again, circulation has promptly realized method of the present invention so repeatedly.
The comparison of three kinds of implementations:
(1) machinery-relay control: its frame for movement is complicated, and electric control gear is simpler,
(2) counting control: electric control gear is complicated, and mechanical device is simpler,
(3) time control: electric control gear and mechanical device are all simpler.
Processed sample according to device of the present invention now, compare with the workpiece that the normal conventional method processes, can find out obviously that effect of the present invention is as shown in Figure 5 extraordinary: A partly is commonsense method processing, and B partly is that method of the present invention and device are processed.
(1) clockwise turn to n circle back oppositely, the suitable wire electrode of 1 circle is about 0.5M,
(2) be rotated counterclockwise to reverse again behind the n-4 circle, like this, promptly along be moved to the left with respect to silk tube position repeatedly at every turn, after n circle wire electrode moved to left extreme position, state of a control promptly changed in the processing district of n circle:
1. turn is that n circle back is reverse counterclockwise,
2. clockwise turn to n-4 circle back oppositely,
N circle wire electrode is along with moving right with respect to silk tube position repeatedly at every turn like this, encloses wire electrode to n and moves to right behind the extreme position, and state of a control changes direction again, and reciprocation cycle can meet the demands.
3, time-controlling arrangement:
Because the wire cylinder motor rotating speed is constant, the counting of n circle can be converted into regular hour t among Fig. 3.
As the rotational time corresponding to the n circle is t
1, (n-4) the circle rotational time is t
2, adopt typical timing circuit to meet the demands.
Referring to Fig. 4:
To import the time in the single-chip microcomputer by the dial-up dish, it is output as the motor steering control signal, and commutation signal is that 0 o'clock corresponding motor just changes; Commutation signal is corresponding motor counter-rotating in 1 o'clock, the once corresponding dial-up dish of the every commutation of motor has been dialled a numeral, the time of the corresponding silk tube of the numeral of dial-up rotation, the promptly corresponding wire electrode number of turns that realizes no striped processing, and the time that makes counter-rotating, the number of turns of then not having striped machined electrode silk was towards moving corresponding to positive veer, until extreme position less than the time of just changeing, oppositely move to another extreme position again, circulation has promptly realized method of the present invention so repeatedly.
The comparison of three kinds of implementations:
(1) machinery-relay control: its frame for movement is complicated, and electric control gear is simpler,
(2) counting control: electric control gear is complicated, and mechanical device is simpler,
(3) time control: electric control gear and mechanical device are all simpler.
Processed sample according to device of the present invention now, compare with the workpiece that the normal conventional method processes, can find out obviously that effect of the present invention is as shown in Figure 5 extraordinary: A partly is commonsense method processing, and B partly is that method of the present invention and device are processed.
Claims (2)
1, a kind of method that improves the wire cutting machine tool quality of work piece surface, it is characterized in that, it is that a kind of realization surface of the work does not have the striped method for processing, it is the radius that feed in every single processing is less than or equal to wire electrode, the motion that adds the wire electrode in man-hour is for moving back and forth, and oppositely wire length is less than forward wire length, back and forth each, the wire electrode of working is passed forward equably to an end extreme position, and then counter motion, and reverse wire length is greater than forward wire length, to other end extreme position, finish once big back and forth, so circulation.
2, realize the device of no striped processing, it is characterized in that this device has following several:
(1) a mechanical relay control device: by silk tube (1), a motor (2), secondary motor (3), secondary ram (4), the collision block II of once moving about (5), travel switch S
1-1(6) and S
1-2(7), the collision block I of once moving about (8), the secondary collision block (9) that moves about, support (10), secondary stroke switch S
2-1(11), slide plate (12), secondary stroke switch S
2-2(13) form.By the wire electrode length of one stroke switch with the relative position decision single processing of the collision block that once moves about; By the secondary stroke switch, the secondary total length that the relative position of collision block has determined that wire electrode is participated in processing of moving about, by the relative position of collision block with the silk tube that once move about, it is in running order to have determined the silk tube to go up the wire electrode of appropriate section.
(2) numerical control device: by the A/D conversion equipment convert to digit pulse and one the cover digital control circuit form.
(3) various typical timing circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101457 CN1016590B (en) | 1987-11-28 | 1987-11-28 | Method and equipment for improving quality of work piece surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101457 CN1016590B (en) | 1987-11-28 | 1987-11-28 | Method and equipment for improving quality of work piece surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1033357A true CN1033357A (en) | 1989-06-14 |
| CN1016590B CN1016590B (en) | 1992-05-13 |
Family
ID=4813442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87101457 Expired CN1016590B (en) | 1987-11-28 | 1987-11-28 | Method and equipment for improving quality of work piece surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016590B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293977C (en) * | 2001-11-27 | 2007-01-10 | 三菱电机株式会社 | Wire electrode cutting unit |
| CN102179581A (en) * | 2011-04-25 | 2011-09-14 | 苏州电加工机床研究所有限公司 | Digital type wire feeding drum driving and controlling device of electrical discharge wire cutting machine |
| CN106001815A (en) * | 2016-07-31 | 2016-10-12 | 潘琴丽 | Wire movement limiting device for small linear cutting machine |
-
1987
- 1987-11-28 CN CN 87101457 patent/CN1016590B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293977C (en) * | 2001-11-27 | 2007-01-10 | 三菱电机株式会社 | Wire electrode cutting unit |
| CN102179581A (en) * | 2011-04-25 | 2011-09-14 | 苏州电加工机床研究所有限公司 | Digital type wire feeding drum driving and controlling device of electrical discharge wire cutting machine |
| CN106001815A (en) * | 2016-07-31 | 2016-10-12 | 潘琴丽 | Wire movement limiting device for small linear cutting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1016590B (en) | 1992-05-13 |
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