CN1418758A - Working method of linear cutting high precision double plane runin different plane - Google Patents
Working method of linear cutting high precision double plane runin different plane Download PDFInfo
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- CN1418758A CN1418758A CN02148589.5A CN02148589A CN1418758A CN 1418758 A CN1418758 A CN 1418758A CN 02148589 A CN02148589 A CN 02148589A CN 1418758 A CN1418758 A CN 1418758A
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- interpolation
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- planker
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003672 processing method Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000011218 segmentation Effects 0.000 claims description 2
- 238000003754 machining Methods 0.000 abstract description 11
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 238000000205 computational method Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The present invention provides a double-plane interpolation non-aniplanar machining method, and the correspondent control software also is designed according to said method. For upper surface and undersurface of workpiece to be machined it can respectively make drawing, interpolation and calculation so as to ensure the uniformity of upper surface and undersurface machining speed. Said method can be used for machining control of workpiece cone linear cutting, can raise its machining accuracy and cutting efficiency.
Description
Affiliated technical field
This method belongs to the line cutting Computerized Numerical Control processing technology in computer numerical control (CNC) (CNC) system.
Background technology
Multi-shaft interlocked antarafacial process technology is a computer numerically controlled important development direction.At present, domestic line cutting Digit Control Machine Tool, still than higher, the cutting accuracy of big tapering mould also is greatly improved in the technical merit of mechanical aspects.But the control technology development relatively lags behind.Though domestic most of control system can be supported four-axle linked processing, the precision effect is fine when the identical tapering workpiece of processing upper and lower surface shape, but effect is not ideal enough when processing the antarafacial workpiece that upper and lower surface is big or small and shape is all inequality, precision does not reach requirement, even circular arc become broken line, and its basic reason is that control method has shortcoming.Two kinds of methods that processing is used always as present line cutting tapering: the angle that 1. remains where one is servo-actuated method; 2. UV ratio servo-actuated method.Its operation principle is to use same model basically, promptly only the workpiece lower plane is carried out INTERPOLATION CONTROL OF PULSE, and the plane makes it servo-actuated on the workpiece.For lower plane, owing to directly carry out INTERPOLATION CONTROL OF PULSE, so machining accuracy is higher; But the error of upper surface equals β times of sum of former upper surface mismachining tolerance and lower surface error, causes the upper surface machining accuracy to descend greatly.
Line cutting Digit Control Machine Tool also has the third tapering processing control method, the linear interlock method of promptly four-dimensional track.Though this third processing control method can be processed the antarafacial workpiece, but trueness error is added on original basis from the linearization calculation to circular arc, make machining accuracy further descend, and the entire curve procedure quantity after the linearisation is too big, is difficult for raising the efficiency.
Summary of the invention
The present invention is exactly the deficiency at present various line cutting high accuracy processing control methods, a kind of biplane interpolation antarafacial processing method is proposed, can draw respectively upper surface and the lower surface of wanting processing work, interpolation and calculating, guarantee the even of upper and lower surface process velocity, improved machining accuracy and cutting efficiency greatly.
The technical solution adopted for the present invention to solve the technical problems is:
(1) draw the figure of workpiece surface and lower surface respectively, and the segmentation correspondence;
(2) in corresponding section respectively the figure by the upper and lower surface of workpiece carry out interpolation---the biplane interpolation.In the interpolation process, no matter be one step of plane interpolation on the workpiece, or one step of lower plane interpolation, all will be the feeding step number of its conversion for XY planker and UV planker;
(3) carrying out ratio when conversion, is to be unit with μ of upper and lower surface feeding, so the feeding of XY and UV except integer part, also has decimal, and accumulates decimal, replenishes feeding when the full μ of decimal;
(4) in the corresponding section of last lower plane, suitably select coordination function with realize the upper and lower surface process velocity evenly, the workpiece that processes like this, its up and down geomery conform to drawing, the side transition is also more level and smooth, reaches high-precision requirement.
We have designed and produced control corresponding software according to biplane interpolation antarafacial processing method.Through facts have proved, use this method to carry out the machining control of workpiece tapering line cutting, overcome the shortcoming of original processing method, improved machining accuracy and cutting efficiency greatly.In addition, workpiece being carried out antarafacial, to add the planar processing precision up and down in man-hour higher equally.
Description of drawings
Fig. 1 is line cutting digital control processing process schematic diagram.In existing microcomputer, insert a hardware controls card, machining control software is sent four control signals of XY and UV by control card, signal is handled the work of rear drive lathe stepper motor through amplifying, thereby makes XY on the lathe, UV planker do relative motion, i.e. workpiece and molybdenum filament relative motion.In addition, between workpiece and molybdenum filament, add high frequency electric source, utilize the spark discharge between them that workpiece is carried out cutting processing.
Fig. 2 is lower surface interpolation computational methods schematic diagrames.
Fig. 3 is upper surface interpolation computational methods schematic diagrames.
The specific embodiment
Control software is realized line cutting spark machined by hardware controls card and driving power, and control software implementation process is as follows: 1. according to the workpiece drawing, draw the different X-Y scheme in workpiece top and bottom and mark corresponding relation.2.XY plane, UV plane form procedure separately.3. the coordination interpolation function of upper and lower surface
(a) coordination function chooses
In process, in the mutual corresponding section of upper surface and lower surface, the interpolation feeding is evenly carried out according to certain proportionate relationship, finally make corresponding up and down section finish feeding simultaneously.
Be defined as follows five parameters:
S
OnFor upper surface should the interpolation feeding sum;
S
DownFor lower surface should the interpolation feeding sum;
S
On' be the step number of current upper surface interpolation feeding;
S
Down' be the step number of current lower surface interpolation feeding;
S
JBe the upper and lower surface total step number (S of interpolation altogether
J=S
On+ S
Down)
In process, if satisfy
Be S
DownS
On'-S
OnS
Down'=0 can guarantee that then the interpolation feeding of upper and lower surface is evenly carried out in proportion, if
Be S
DownS
On'-S
OnS
DownThe interpolation feeding of lower surface then should be carried out in '＞0.Therefore, can establish coordination function is F
S=S
DownS
On'-S
OnS
Down', control the carrying out in proportion of interpolation feeding of upper and lower surface.
Work as F
S〉=0 o'clock, lower surface interpolation feeding;
Work as F
S＜0 o'clock, upper surface interpolation feeding.
(b) calculating of coordination function
After one step of lower surface interpolation,
S
Down' ← S
Down'+1
S
DownS
On'-S
On(S
Down'+1)=S
DownS
On'-S
OnS
Down'-S
On
Be F
SComputing formula be: F
S← F
S-S
OnAfter one step of upper surface interpolation,
S
On' ← S
On'+1
S
Down(S
On'+1)-S
OnS
Down'=S
DownS
On'-S
OnS
Down'+S
Down
Be F
SComputing formula be: F
S← F
S+ S
Down4. the lower surface interpolation is calculated
When lower surface interpolation feeding, the invariant position that should keep the intersection point of wire electrode and upper surface, as shown in Figure 2, the amount of feeding of lower surface is Δ D, the XY planker drives the amount of feeding Δ X of wire electrode, the amount of feeding that the UV planker drives wire electrode is Δ U, according to geometrical relationship, can be obtained the amount of feeding of XY planker and UV planker by following formula:
Δ X=Δ D * (h+H
Down)/h
Δ U=Δ D * H
On/ h (Δ U direction is opposite with the Δ directions X) considers that the mobile reality of XY planker is that workpiece is moving, and at this moment the position of UV planker and workpiece are also done relative motion, so (with Δ X opposite direction) also will add the displacement of Δ X on the direction of Δ U, promptly
The interpolation of Δ U=Δ U+ Δ X5. upper surface is calculated
When upper surface interpolation feeding, the invariant position that should keep the intersection point of wire electrode and lower surface, shown in Fig. 2 (b), if the amount of feeding of upper surface is Δ D, the XY planker drives the amount of feeding Δ X of wire electrode, the amount of feeding that the UV planker drives wire electrode is Δ U, according to geometrical relationship, can be obtained the amount of feeding of XY planker and UV planker by following formula:
Δ X=Δ D * H
Down/ h
Δ U=Δ D * (h+H
OnThe processing of)/h+ Δ X6. error
The amount of feeding of XY planker and UV planker is the result that tries to achieve of formula proportionally, might not be integer value.But actual feeding step number can only be represented by integer, therefore in the feeding process, the decimal place accumulation of the amount of feeding must be handled.
For instance, H
Down=37.5mm, h=32mm, H
On=53.5mm, when lower surface interpolation one step, promptly during Δ D=1 μ:
Δ X=Δ D * (h+H
Down)/h=1 μ * (32+37.5)/32=2.172 μ
On Δ U=Δ D * H/h+ Δ X=1 μ * 5.35/32+2.172 μ=3.844 μ
At this moment, the XY planker is feeding 2 μ on directions X, the UV planker is feeding 3 μ on the U direction, after XY planker and UV planker replace feeding, the residue amount of feeding 0.172 μ and 0.844 μ are added to respectively in the error register of directions X and U direction, and whether the numerical value in the error in judgement register is greater than 1 μ, if satisfy condition, feeding one step on directions X or U direction correspondingly then, and in error register, deduct 1 μ, if less than 1 μ, proceed following interpolation feeding, all want add up error after each feeding, and the value of error in judgement register, to determine whether feeding.Handle like this, error range can be controlled within 1 μ.Not only improve the speed of processing after handling like this, can also improve the precision of processing.
Claims (2)
1. a line cuts high accuracy biplane interpolation antarafacial processing method, it is characterized in that: in the corresponding section of last lower plane, suitably selecting coordination function to carry out interpolation calculates to realize the even of upper and lower surface process velocity, concrete drafting, interpolation, calculating and processing method are: (a) draw the figure of workpiece surface and lower surface respectively, and the segmentation correspondence;
(b) in corresponding section respectively the figure by the upper and lower surface of workpiece carry out interpolation, in the interpolation process, no matter be one step of plane interpolation on the workpiece, still one step of lower plane interpolation, all will be its conversion feeding step number that is XY planker and UV planker;
(c) carrying out ratio when conversion, is to be unit with μ of upper and lower surface feeding, so the feeding step number of XY and UV except integer part, also has decimal, its decimal place is accumulated processing, replenishes feeding when the full μ of decimal.
2. line cutting high accuracy biplane interpolation antarafacial processing method according to claim 1, it is characterized in that above-mentioned processing method sends the four spool control signals of software to XY and UV by control card, signal is handled the work of rear drive lathe stepper motor through amplifying, thereby makes XY on the lathe, UV planker do relative motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021485895A CN1176783C (en) | 2002-12-20 | 2002-12-20 | Working method of linear cutting high precision double plane runin different plane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021485895A CN1176783C (en) | 2002-12-20 | 2002-12-20 | Working method of linear cutting high precision double plane runin different plane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1418758A true CN1418758A (en) | 2003-05-21 |
| CN1176783C CN1176783C (en) | 2004-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021485895A Expired - Fee Related CN1176783C (en) | 2002-12-20 | 2002-12-20 | Working method of linear cutting high precision double plane runin different plane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106681269A (en) * | 2015-11-05 | 2017-05-17 | 中国科学院沈阳计算技术研究所有限公司 | Cutted thread processing method based on dynamic moving average step number |
| CN109799779A (en) * | 2017-11-16 | 2019-05-24 | 华中科技大学 | The Line Cutting Machine Control method and device of digital control system is cut based on gold |
-
2002
- 2002-12-20 CN CNB021485895A patent/CN1176783C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106681269A (en) * | 2015-11-05 | 2017-05-17 | 中国科学院沈阳计算技术研究所有限公司 | Cutted thread processing method based on dynamic moving average step number |
| CN106681269B (en) * | 2015-11-05 | 2018-11-27 | 中国科学院沈阳计算技术研究所有限公司 | A kind of cutted thread processing method average based on dynamic mobile |
| CN109799779A (en) * | 2017-11-16 | 2019-05-24 | 华中科技大学 | The Line Cutting Machine Control method and device of digital control system is cut based on gold |
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| Publication number | Publication date |
|---|---|
| CN1176783C (en) | 2004-11-24 |
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