CN107869939A - The three coordinate automatic detection implementation methods with back-off electrode - Google Patents
The three coordinate automatic detection implementation methods with back-off electrode Download PDFInfo
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- CN107869939A CN107869939A CN201711104517.5A CN201711104517A CN107869939A CN 107869939 A CN107869939 A CN 107869939A CN 201711104517 A CN201711104517 A CN 201711104517A CN 107869939 A CN107869939 A CN 107869939A
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- electrode
- chaining pin
- measurement
- point
- coordinate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/004—Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points
Abstract
A kind of three coordinate automatic detection implementation methods with back-off electrode, overcome existing three-dimensional coordinates measurement automatic detection can not generate the shortcomings that chaining pin is with measurement track of the back-off electrode without interference, the present invention has taken into full account the influence that the presence in electrode back-off face generates to three coordinate autotests, the chaining pin measurement track for overcoming existing three coordinate measurements programming automatic generation and the interference problem for treating measuring tape back-off electrode, utilize achievable the automatically generating with back-off electrode measurement formula of the present invention.Proved by actual test, the present invention can conveniently and efficiently obtain the chaining pin of three coordinate detectors with measurement track of the back-off electrode without interference, meeting three coordinate detectors to the needs with back-off electrode shape and accurate size measurement.
Description
Technical field
The present invention relates to a kind of technology of electric spark machining field, specifically a kind of three coordinates with back-off electrode are certainly
Dynamicization detects implementation method.
Background technology
Electrical discharge machining is therefore particularly suitable for multiple due to simply can copy to the shape of tool-electrode on workpiece
The processing of miscellaneous surface configuration workpiece, can also process thin-walled, elasticity, Low rigidity, microscopic pinholes, irregular hole, Fine and Deep Hole etc. has
The part of particular/special requirement.The particularly use of Numeric Control Technology so that turn into existing with the part of simple electrode machining complicated shape
It is real.Under demand currently increasingly urgent to baroque mould, electrical discharge machining is due to adding with can process conventional cutting
When work method is difficult to the material cut and complex-shaped workpieces, processing without cutting force, do not produce burr and mark groove defect etc.
Feature, it is widely used to the processing of labyrinth mould.
The dimensional accuracy of electrode determines the precision of the mould finally processed, therefore, it is preceding to electricity to carry out mould processing
The accurate measurement of pole size and dimension just seems particularly critical.Three-dimensional coordinates measurement method is current measurement and obtains sized data most
One of effective method, because it can replace the built-up gauge of a variety of surface measurement instruments and costliness, and the measurement of complexity
The required by task time reduces to minute from hour, has taken into account the Efficiency and accuracy of measurement, can be to the size, shape and shape of electrode
Position tolerance carries out Precision measurement.
Need to set corresponding three coordinate measurements program realization automation during using three-coordinates measuring machine measuring electrode size
Measurement, it is without the automatic generation method of back-off electrode measurement formula more ripe, but this method is limited in that it sets
The movement locus of the chaining pin measurement process of meter is all parallel or vertical with reference axis, is fallen when directly applying to the band shown in Fig. 1
The chaining pin measurement track automatically generated and the interference problem of electrode to be measured occurs in the detection of button electrode, therefore this method is only applicable
In the automatic measurement of the ordinary electrode without back-off region feature shown in Fig. 1, band back-off electrode measurement formula is not particularly suited for
Automatically generate.
The content of the invention
The present invention is directed to deficiencies of the prior art, proposes a kind of three coordinate automatic detections with back-off electrode
Implementation method, overcome existing three-dimensional coordinates measurement automatic detection can not generate chaining pin and with measurement track of the back-off electrode without interference
The shortcomings that, the present invention has taken into full account the influence that the presence in electrode back-off face generates to three coordinate autotests, overcomes
The chaining pin measurement track of existing three coordinate measurements programming automatic generation and the interference problem for treating measuring tape back-off electrode, utilize this hair
It is bright that automatically generating with back-off electrode measurement formula can be achieved.Proved by actual test, the present invention can be obtained conveniently and efficiently
The chaining pin of three coordinate detectors is with measurement track of the back-off electrode without interference, meeting three coordinate detectors to band back-off electrode shape
Shape and the needs of accurate size measurement.
The present invention is achieved by the following technical solutions：
The present invention comprises the following steps：
1) setting is directed to initial position of the electrode body to be measured in the security plane, i.e. chaining pin of three change in coordinate axis direction of x, y, z.
The initial position of described chaining pin is located on security plane, and the inceptive direction of probe is perpendicular to security plane.
Described security plane is flat at 5~20mm outside the extension of the largest contours of electrode body in the x, y, z-directions
Face.
2) electrode body normal to a surface direction where simulation sets chaining pin from test point position along test point return back to electrode
The spacing of the first intermediate position points outside body surface face, the intermediate position points and test point be three-coordinates measuring machine setting rollback away from
From value.
The coordinate of described test point but it is not limited in the following manner and obtains：According to the type in face, the size in face, test point it
Between the rule such as spacing, test point and the distance on side each face of electrode model is uniformly distributed to obtain.
The rollback distance value of described three-coordinates measuring machine setting is preferably arranged to 0.8~1.2mm.
3) chaining pin is calculated from initial position to test point position using trial-and-error method, it is minimum in XZ and YZ planes respectively
Corner clockwise so that the movement locus of chaining pin does not interfere with electrode body, chaining pin is rotated by angle value is calculated, Ran Houfen
Not Ji Suan the location point that intersects with x directions security plane of axis direction of the chaining pin on XZ or YZ faces, i.e. the second intermediate position points.
Described trial-and-error method refers to：Chaining pin constantly adjusts corner clockwise so that the movement locus and electrode body of chaining pin
Do not interfere, thus find out the corner clockwise that the satisfaction of minimum requires.
4) location point intersected along+z direction calculatings with z directions security plane, i.e. the 3rd intermediate position points.
5) the band back-off electrode that the initial position of chaining pin as calculates with the line of each intermediate position points and test point
Three coordinate automatic detections gauge head movement locus.
6) the gauge head movement locus obtained with step 5 carries out inverse process motion, realizes automatic measurement.
Described inverse process motion refers to：
6.1) chaining pin original state is parallel to z-axis, and gauge head is on the security plane in z directions.Determine test point, algorithm is automatic
Identify measuring point to be checked whether back-off.When non-back-off, then electrode can be completed using existing three-dimensional coordinates measurement autotest
The measurement of shape and size；When measuring point back-off, then step 6.2) is carried out.
6.2) chaining pin turns clockwise 5 degree, the angle be in the measurement process calculated chaining pin with not sent out with back-off electrode
The minimum anglec of rotation of raw interference.
6.3) chaining pin is moved to the intersection position in horizontal safety face and vertical security plane along+x directions on horizontal safety face
Put.
6.4) a certain position that chaining pin is moved near electrode back-off mouth along-z directions in vertical safety surface.
6.5) company of the vertical point that axis direction of the chaining pin along chaining pin is moved near test point, the location point and test point
Line is the normal in face where measuring point to be checked.
6.6) normal direction of the chaining pin along face where measuring point to be checked moves, and is measured after gradually approaching to measuring point to be checked.
6.7) after being measured, chaining pin returns to initial position along former track and prepares to measure next time.
6.8) anglec of rotation that one-shot measurement is calculated instantly is less than the previous anglec of rotation, in order to ensure gauge head and electrode
Safe distance between peak repeats step 6.1) to 6.7), it is necessary to raise chaining pin before gauge head is swung.
The described height h=h raiseds+Rz* tan (α), wherein：hsFor clearance plane elevation, RzFor three coordinates revolution half
Footpath, α are the anglec of rotation.
The present invention relates to a kind of system for realizing the above method, including：Automatically generate detection track module, automatically generate survey
Program module, automatic measurement and generation reporting modules are measured, wherein test point and centre can be generated by automatically generating detection track module
The coordinate information of point, automatically generates process of measurement module by calling the automation interface of system of 3 axes to automatically generate electrode
Process of measurement, automatic measurement and generation reporting modules can perform process of measurement automatically and extract measurement result and then generate measurement
Report.
Technique effect
Compared with prior art, the present invention can reduce trial and error number, reduce the Energy in use of three coordinate measuring machine, solve business
Industry three coordinate measuring machine can not carry out the deficiency of back-off electrode automatic detection automatically.
Brief description of the drawings
Fig. 1 is for ordinary electrode and with back-off electrode schematic diagram；
Fig. 2 is the three coordinate automatic measurement Principle of Process figures with back-off electrode；
Fig. 3 is three coordinate automatic measurement process schematics of certain size electrodes with back-off region feature；
Electrode shown in figure only illustrates the electrode of certain specific dimensions with back-off region feature, initial position the 1, the 3rd
Intermediate position points 2, the second intermediate position points 3, vertical point 4, test point 5, the first security plane 6, the second security plane 7, electrode
9th, chaining pin 10.
Embodiment
As shown in figure 3, being the side view for treating measuring tape back-off electrode in the present embodiment, there is A, B, C, D tetra- in the electrode
Back-off face.
The present embodiment describes the coordinate automatic detection of band back-off electrode three in detail by taking a test point on the A of back-off face as an example
The generation of program and automatic measurement process.
The rollback distance value of step 1, the normal direction in face where the coordinate of test point, the point and three-coordinates measuring machine setting is all
For known quantity.Chaining pin is pin-pointed to test point position first, then return back to detection along the normal direction in face where test point
The first intermediate position points 4 near point.
Step 2, the minimum corner α clockwise of chaining pin is calculated using trial-and-error method so that the movement locus of chaining pin and electrode 9
Do not interfere, chaining pin is rotated by angle value α is calculated.
Step 3, in order to simultaneously compromise between security and measurement efficiency, the security plane in z directions is arranged to the highest of electrode 9
At the 20mm of point top, the first security plane 6 is designated as.The security plane in x, y direction is arranged to outside the largest contours of electrode 9 at 5mm,
The second security plane 7, the 3rd security plane (not shown) are designated as respectively.The friendship with the second security plane 7 is calculated along α angles
Point, i.e. the second intermediate position points 3.
Step 4, along+z direction calculatings and the intersection point of the first security plane 6, it is designated as the 3rd intermediate position points 2.So far, pin
Three coordinate automatic measurement tracks of test point on the A of back-off face are had determined.
The angle of step 5, chaining pin original state and vertical direction is 0 °, and gauge head is on the first security plane 6, i.e., initial
Position 1.
Step 6, chaining pin turn clockwise angle [alpha], α angles be in the measurement process calculated chaining pin with back-off electrode not
The minimum anglec of rotation interfered.
Step 7, the 3rd interposition that chaining pin is moved on the second security plane 7 along+x directions on the first security plane 6
Put a little 2.
Step 8, chaining pin are moved to the second intermediate position points 3 along-z directions in vertical safety surface 2.
Step 9, axis direction of the chaining pin along chaining pin are moved to test point 4.
Step 10, normal direction of the chaining pin along face A where measuring point to be checked are moved, surveyed after gradually approaching to measuring point to be checked
Amount.
Step 11, after being measured, chaining pin along the intermediate position points 2 of 4 → the second intermediate position points of test point the 3 → the 3rd →
The inverse track of the measurement track of initial position 1 returns to initial position and prepares to measure next time.
Step 12, the rotation angle α that one-shot measurement is calculated instantly are less than this anglec of rotation, in order to ensure gauge head with
Safe distance between electrode peak repeats step 1, it is necessary to chaining pin suitably to be raised to certain height before gauge head swing
To 11.
The present embodiment implementation environment includes：Hai Kesikang three coordinate measuring machines, measuring system：PC-DMIS2015 versions, measurement
Speed：45, touch degree of testing the speed：2, detection range：2mm, rollback distance：1mm, chaining pin：D1L40, it can use and survey wedge angle degree：T1A0B0、
30 degree of surveys are sharp 4,45 degree of survey points, 4,60 degree surveys are sharp 4,90 degree of surveys are sharp 4, electrode：There is the electrode entity of back-off feature, electricity
Counted in the basis point of pole：12, electrode detection points：20, electrode back-off position detection point number：5.
The program obtained based on the above method is specific as follows：
1. in dividing, take point, intended trajectory time：600s
2. automatically generate process of measurement：
3. automatically generate measurement point coordinates and trajectory time：10s
4. automatically generate process of measurement：5s
Above-mentioned specific implementation can by those skilled in the art on the premise of without departing substantially from the principle of the invention and objective with difference
Mode local directed complete set is carried out to it, protection scope of the present invention is defined by claims and not by above-mentioned specific implementation institute
Limit, each implementation in the range of it is by the constraint of the present invention.
Claims (8)
1. a kind of three coordinate automatic detection implementation methods with back-off electrode, it is characterised in that comprise the following steps：
1) setting is directed to initial position of the electrode body to be measured in the security plane, i.e. chaining pin of three change in coordinate axis direction of x, y, z；
2) electrode body normal to a surface direction where simulation sets chaining pin from test point position along test point return back to electrode body surface
The spacing of the first intermediate position points outside face, the intermediate position points and test point is the rollback distance of three-coordinates measuring machine setting
Value.
3) chaining pin is calculated from initial position to test point position using trial-and-error method, respectively the minimum up time in XZ and YZ planes
Pin corner so that the movement locus of chaining pin does not interfere with electrode body, by chaining pin by angle value rotation is calculated, then counts respectively
Calculate the location point that axis direction of the chaining pin on XZ or YZ faces intersects with x directions security plane, i.e. the second intermediate position points；
4) location point intersected along+z direction calculatings with z directions security plane, i.e. the 3rd intermediate position points；
5) three with back-off electrode that the initial position of chaining pin as calculates with the line of each intermediate position points and test point
The gauge head movement locus of coordinate automatic detection；
6) the gauge head movement locus obtained with step 5 carries out inverse process motion, realizes automatic measurement.
2. according to the method for claim 1, it is characterized in that, the initial position of described chaining pin is located on security plane, visit
The inceptive direction of pin is perpendicular to security plane.
3. according to the method for claim 1, it is characterized in that, described security plane for electrode body largest contours x, y,
Plane outside extension on z directions at 5~20mm.
4. according to the method for claim 1, it is characterized in that, the rollback distance value of described three-coordinates measuring machine setting is set
For 0.8~1.2mm.
5. according to the method for claim 1, it is characterized in that, described trial-and-error method refers to：Constantly adjustment is clockwise for chaining pin
Corner so that the movement locus of chaining pin does not interfere with electrode body, thus finds out the corner clockwise that the satisfaction of minimum requires.
6. according to the method for claim 1, it is characterized in that, the motion of described inverse process refers to：
6.1) chaining pin original state is parallel to z-axis, and gauge head is on the security plane in z directions；Determine test point, algorithm automatic identification
Measuring point to be checked whether back-off；When non-back-off, then electrode shape can be completed using existing three-dimensional coordinates measurement autotest
With the measurement of size；When measuring point back-off, then step 6.2) is carried out；
6.2) chaining pin turns clockwise 5 degree, the angle be in the measurement process calculated chaining pin with not done with back-off electrode
The minimum anglec of rotation related to；
6.3) chaining pin is moved to the intersection position in horizontal safety face and vertical security plane along+x directions on horizontal safety face；
6.4) a certain position that chaining pin is moved near electrode back-off mouth along-z directions in vertical safety surface；
6.5) line of the vertical point that axis direction of the chaining pin along chaining pin is moved near test point, the location point and test point is
The normal in face where measuring point to be checked；
6.6) normal direction of the chaining pin along face where measuring point to be checked moves, and is measured after gradually approaching to measuring point to be checked；
6.7) after being measured, chaining pin returns to initial position along former track and prepares to measure next time；
6.8) anglec of rotation that one-shot measurement is calculated instantly is less than the previous anglec of rotation, in order to ensure gauge head and electrode highest
Safe distance between point repeats step 6.1) to 6.7), it is necessary to raise chaining pin before gauge head is swung.
7. the method according to claim 11, it is characterized in that, the described height h=h raiseds+Rz* tan (α), wherein：hs
For clearance plane elevation, RzIt is the anglec of rotation for the three coordinate radius of gyration, α.
A kind of 8. system for realizing any of the above-described claim methods described, it is characterised in that including：Automatically generate detection track
Module, process of measurement module, automatic measurement and generation reporting modules are automatically generated, wherein automatically generating detection track module can give birth to
Into test point and the coordinate information of intermediate point, process of measurement module is automatically generated by calling the automation interface of system of 3 axes
The process of measurement of electrode is automatically generated, automatic measurement and generation reporting modules can perform process of measurement automatically and extract measurement knot
Really measurement report is generated afterwards.
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| CN110006379A (en) * | 2019-01-16 | 2019-07-12 | 苏州罗伊艾米精密工业有限公司 | A kind of structure detection system |
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| CN110006378B (en) * | 2019-01-16 | 2021-06-15 | 苏州罗伊艾米精密工业有限公司 | Structure detection method |
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Application publication date: 20180403 |