CN100522472C

CN100522472C - Methods of measuring and compensating cutting size on chamfering machine of sheet material

Info

Publication number: CN100522472C
Application number: CNB2006100786170A
Authority: CN
Inventors: 坂下浩之; 齐田一
Original assignee: Nakamura Tome Precision Industry Co Ltd
Current assignee: Nakamura Tome Precision Industry Co Ltd
Priority date: 2006-02-24
Filing date: 2006-04-26
Publication date: 2009-08-05
Anticipated expiration: 2026-04-26
Also published as: JP4621605B2; JP2007223005A; TWI290086B; TW200732090A; KR100751183B1; CN101024275A

Abstract

The invention relates to a method for measuring and correcting chamfer size of rectangle glass basal edge. It is not necessary to detach the workpiece from chanfer device, therefore the finish size is automatically detected and the position of worktable and tool of chanfer device based on the detected value. After the positioning mark is set on the position of three acmes of right triangle formed on the board and the board and lateral border parrallel to feed direction are processed, in the first measuring procedure, the board is transfered towards returning direction and one camera of two camera reads two marks set on the feed direction to detect difference of two marks at the position perpendicular to feed direction. In the second measuring procedure, after the camera is moved to the position for reading the lateral border, the board is feeded and the finish size of lateral border is detected by the two camera. In addition, the angle of worktable and the allowance of tool height are calculated based on the detecting result.

Description

The measuring method of the processing dimension in the facing attachment of sheet material and modification method

Technical field

The present invention relates to a kind of measurement and modification method of processing dimension of the facing attachment that the edge of the rectangle glass that is used for display screen and so on is processed, promptly, relate to a kind of to process and survey sample the processing dimension of the sheet material of object as test, automatically measure, revise the method for the workbench and the tool location of facing attachment according to this measured value.

Background technology

The facing attachment of glass substrate is to by cutting off etc. and sharp-pointed crest line that is produced on the edge of cut glass substrate and corner angle carry out the device of chamfering or rounding processing with instrument (normally emery wheel).As shown in Figure 8, usually, this facing attachment has the workbench 2 of using negative-pressure adsorption glass substrate 1 and the instrument 3 that is arranged on this workbench both sides.Workbench 2 utilizes the whirligig can be around the vertical axis half-twist, and workbench 2 and

instrument

3,3 can relatively move on the direction of feed of regulation.Substrate 1 is fixed on the workbench, and makes the edge 8 that will process parallel with above-mentioned direction of feed.

As the glass substrate of display screen, in order to maximize and weight reduction, the thickness of substrate becomes thinner, and the width of chamfering is about 0.3mm, and requirement has higher processing precision.In order to realize this higher processing precision, on glass substrate 1 (perhaps being attached to the thin plate on the substrate), on the vertex position of right angled triangle, enclose telltale mark (alignment mark) 4, the direction on two limits of this right angled triangle quadrature is the direction at the edge of glass substrate 1, with be arranged on the direction of the direction of feed quadrature of workbench (below, be referred to as " width ") on two

cameras

5,5, read two marks on width in three telltale marks 4, so that set the anglec of rotation and the tool location of workbench.

Promptly, adjust the angle of workbench 2, so that with the direction of the line quadrature that the position of two

marks

4,4 is coupled together be direction of feed, the position of above-mentioned two

marks

4,4 is detected from the image that imageing sensor read of two cameras that utilize width.And, according to by the position probing of

mark

4,4 to substrate 1 the center and be recorded in substrate size in the control device in advance, the position of

adjustment instrument

3,3 on width, carry out the processing of substrate, so that the width of chamfering reaches the desired value of regulation.

Then, after the process finishing of side's

opposite edges

8,8 of substrate,, the set positions of the width of instrument 3 on new position, is reprocessed second

opposite edges

9,9 with workbench 2 half-twists.

In addition, as shown in Figure 9, because the instrument 3 of facing attachment is with the periphery of some

discoideus emery wheels

16,16 the upper and lower crest line of substrate edges to be processed simultaneously, and

emery wheel

16,16 is fixed on the upper and lower rotating

shaft

15u, 151 with the direction of feed almost parallel of substrate, by the Height Adjustment of

instrument

3,3 is become following height, make two

rotating shaft

15u, 151 intermediate altitude be in the mid-depth of the substrate 1 on the workbench 2, thereby can be the chamfering width adjustment of upper and lower crest line same width.In addition, on the instrument 3 in the drawings, on the front and back end of following rotating shaft 151, fixing and have the bight chamfering abrasive wheel 17 that drift angle is 45 ° a taper seat, carrying out the chamfering at substrate bight (four angles) with this bight chamfering abrasive wheel 17.

On this facing attachment, be provided with the automatic conveying device of substrate, so that carry out the chamfer machining of many substrates continuously.As mentioned above, add the direction of workbench 2 in man-hour and the position of

instrument

3,3, adjust as benchmark with the position that is attached to the telltale mark 4 on the glass substrate 1, to process accurately., for example, relation has had error when the position of two

cameras

5,5, and perhaps instrument 3 wearing and tearing when the height of instrument 3 has error, will make the chamfer dimesion of the substrate of being processed produce error.

Therefore, be after the substrate of testing processing is taken out from processing machine in the past, be placed on the measuring instrument, by the operator with the microscope of measuring instrument measure from telltale mark 4 (referring to Figure 10) to chamfering line 7 apart from a, b, with chamfering width c, d, with chamfer dimesion e, the f in bight, adjust the direction of workbench and the width and the height and position of instrument according to measured value again.Also have, the substrate that processing is over will be suitably extracted in the variation of the processing dimension that is caused in order to revise because through back tool wear after a while etc., uses and top described same method mensuration chamfer dimesion, tool location is revised etc.

, in above-mentioned method in the past, because the measurement of processing dimension will be with manually carrying out, thereby have following problem: operating personnel must have skilled technical ability; Might take place because do not note and misunderstand and the measure error that produces; Need come the correction value of evaluation work corner of table degree and tool location according to measured value, in this operation, need spended time; Operating personnel need manually be input to the correction value of calculating in the controller of facing attachment and go, and might produce input error or the like.Also have, as the peculiar problem of facing attachment, also can produce following problem: be accompanied by as the large tracts of landization of the glass substrate of workpiece and the slimming of thickness, the substrate of test processing and the substrate of sampling check, the task difficulty that takes out from facing attachment and it is arranged on the checkout gear has increased; And along with the maximization of workbench, the error of processing dimension has also increased.

Promptly; because the area of glass is big; thin thickness, therefore if pay no heed to when transporting substrate, substrate may be broken in the process of transporting; thereby need prepare special-purpose conveyer; measured substrate is taken out from facing attachment, be installed on the checkout gear, perhaps will take special care to carry out integration of operation and transport substrate with several operating personnels; so just produced the burden or the homework burden that increase equipment, and the problem that also will expend time in when transporting or the like.In addition, large tracts of landization owing to the maximization of substrate and the workbench that produces thereupon, following point will take place, be the angular error of workbench on direction of feed and the error of flatness or levelness, make and to increase along the variation and the inconsistent error of upper and lower chamfering width of the chamfering width of edge of work direction.

Summary of the invention

The present invention puts forward in order to solve the problems referred to above that exist in the method in the past, its objective is that providing a kind of needn't take out the sheet material as workpiece from facing attachment, just can measure processing dimension automatically, and can be according to this measured value, to revise the technological means of the error of chamfer dimesion than higher in the past precision.

The a first aspect of the present invention that addresses the above problem, the measuring method of the chamfer dimesion in the facing attachment, promptly telltale mark 4 is attached on the position on leg-of-mutton three summits that meet at right angles on the sheet material 1 that carries out chamfer machining, the position of the above-mentioned mark that is read with the camera 5 that is loaded on the facing attachment is as benchmark, four edges 8 to above-mentioned sheet material, 9 carry out chamfer machining, it is characterized in that, read be attached to sheet material 1 with respect to two above-mentioned marks on the direction of the relative direction of feed quadrature of instrument 3, determine the direction of above-mentioned sheet material with respect to direction of feed, the lateral edges parallel with this direction of feed processed, measure in the operation first, this sheet material is carried to the direction of sending back to, read two above-mentioned marks that are attached on the direction of feed by a camera in above-mentioned two cameras 5, detect these two and be marked at and meet at right angles position poor of direction of direction of feed; Measure in the operation second,, send this sheet material to, detect the processing dimension of this lateral edges with above-mentioned two cameras after above-mentioned camera movement is to the position of the lateral edges that reads this sheet material.

A second aspect of the present invention, be in the detection method of the first aspect of the invention described above, also has following feature: the lower camera 6 of lower surface that is provided for reading the lateral edges of above-mentioned sheet material 1, measure in the operation above-mentioned second, after on the position that this lower camera is moved to the lateral edges that reads above-mentioned sheet material, send this sheet material to, and with the upper and lower processing dimension at two cameras 5 and two lower camera 6 detection side edges, it is the chamfer dimesion on two faces of sheet material measurement 1 simultaneously.

A third aspect of the present invention, it is the chamfer dimesion of measuring according to said method, revise the method for processing dimension, promptly telltale mark 4 is attached on the position on leg-of-mutton three summits that meet at right angles on the sheet material 1, the position of this mark that is read with the upper camera 5 of the top of the sheet material mounting workbench 2 that is arranged on facing attachment is as benchmark, four edges 8 to above-mentioned sheet material, 9 carry out chamfer machining, it is characterized in that, be provided for reading the lower camera 6 of the lateral edges lower surface of above-mentioned sheet material, read be attached to sheet material 1 with respect to two above-mentioned marks on the direction of the relative direction of feed quadrature of instrument 3, determine the direction of above-mentioned sheet material, the lateral edges parallel with this direction of feed processed with respect to direction of feed; Measure in the operation first, this sheet material is carried to the direction of sending back to, read two above-mentioned marks that are attached on the direction of feed by a camera in above-mentioned two upper camera 5, detect these two and be marked at and meet at right angles position poor of direction of direction of feed; Measure in the operation second, after on the position that above-mentioned upper camera 5 and lower camera 6 is moved to the lateral edges that reads this sheet material, send this sheet material to, detect the upper and lower processing dimension of this lateral edges with above-mentioned two upper camera and two lower camera; Measure in the operation detected two by first and be marked at and meet at right angles position poor of direction of direction of feed, calculate the angular error of above-mentioned workbench; By above-mentioned second upper and lower processing dimension poor of measuring detected lateral edges in the operation, the height error of computational tool; With the above-mentioned angular error of calculating, revise the command value of workbench angle, with the above-mentioned height error of calculating, the command value of coming the truing tool height.

In the method for the invention, owing to, read in two telltale marks arranged side by side on the direction of feed with a camera, so can be with the angular error of higher accuracy detection workbench 2 making sheet material 1 along direction of feed or send direction back to and move midway.Owing to can detect the angular error of above-mentioned workbench and the error of chamfer dimesion simultaneously, so, just can calculate the correction value of the tool location that round-off error uses by the angular error that adds the workbench in man-hour being added in the calculating on the measured chamfer dimesion.That is, in test processing, saved after the angular error of having revised workbench the repetition formality that tries to process.In addition, the sheet material with through sampling check can carry out the correction of workbench angle and these two kinds of corrections of correction of tool location simultaneously.According to the mean value of detected upper and lower chamfering line to the distance of telltale mark 4, or poor between the mean value of upper and lower chamfering width and their desired value, calculate the position correction amount of width, and poor by upper and lower chamfering width, calculate the position correction value of above-below direction.

In the present invention, use is loaded in the camera on the facing attachment, on facing attachment, carry out the detection of processing dimension, by means of the computing formula that in the controller of facing attachment, writes down in advance by the correction value of measured value evaluation work corner of table degree and tool location, can calculate those correction values automatically, and, the command value of controller is revised, thereby can revise automatically according to these calculated values.Therefore, the not operation that need take off sheet material from facing attachment for measurement, measure needed time and work load thereby can reduce significantly, and can prevent to follow manual measurement and input correction value and the error of calculation of issuable detection error, correction value, the substandard products that error originated from input produced.In addition, owing to can automatically carry out the calculating and the input of correction value according to detection and measured value thereof, so, can also not bring any homework burden to the operator except shortening the needed time.

In addition, can be to carry out the correction on the sheet material direction of feed than higher in the past precision, meanwhile, by means of the upper and lower camera that is provided with at workbench 2, can carry out the measurement of upper and lower chamfering width automatically, and the height of truing tool, thereby obtain the effect that to revise upper and lower chamfering width error automatically.

Description of drawings

Fig. 1 is the figure of the step of expression processing first opposite edges;

Fig. 2 is the figure of the course of work of the heeling error of expression surveying work platform;

Fig. 3 is the figure that the course of work of processing dimension is measured in expression;

Fig. 4 is the figure of the course of work of expression processing second opposite edges;

Fig. 5 is when being illustrated in processing second opposite edges, the figure of the course of work of the heeling error of testing platform;

Fig. 6 is the figure of the course of work of the expression processing dimension of measuring second opposite edges;

Fig. 7 is the schematic isometric that the equipment of expression facing attachment is provided with;

Fig. 8 is the schematic isometric of an example representing that the equipment of facing attachment in the past is provided with;

Fig. 9 is the stereogram of an example of expression chamfer tool;

Figure 10 is the partial plan layout of the sheet material of expression chamfer dimesion.

Label declaration

1: sheet material, 2: workbench, 3: instrument, 4: telltale mark,

5: camera (upper camera), 6: lower camera, 7: the chamfering line

The specific embodiment

Below, with reference to the description of drawings embodiments of the present invention.As shown in Figure 7, on the facing attachment of implementing method of the present invention, be provided with the

lower camera

6,6 of the chamfering line of the opposite edges lower surface that is used to read the sheet material of being processed 1.Workbench 2, instrument 3, read the mounting structure of camera (upper camera) 5 that telltale mark uses and these parts and be arranged on telltale mark 4 on the sheet material 1, all identical with in the past.Upper and

lower camera

5,6 and instrument 3 are loaded on the same supporting station (not shown), can move freely instrument 3 and the position relationship of

camera

5,6 on direction of feed respectively along width.6,6 of lower camera when reading processing dimension described later, move to

upper camera

5,5 under on the position, except this situation, keep out of the way to the outside and go.

The sheet material of test processing and the sheet material (being designated hereinafter simply as " workpiece ") of sampling check, are processed and are measured to step shown in Figure 6 according to Fig. 1.

Fig. 1 is the figure of the step of expression processing first

opposite edges

8,8, read two

telltale marks

4,4 on the width that is attached to workpiece 1 with two

upper camera

5,5, from handle the position coordinates of the

telltale mark

4,4 that obtains by image, calculate inclination and the direction of feed of workpiece and the center of width of workbench, set the direction of workbench 2 and the position (Fig. 1 (a)) of instrument 3.Then,, workpiece 1 is carried to+Y direction (top among the figure), carried out chamfer machining (Fig. 1 (b)) with 3 pairs first opposite edges of

instrument

8,8 by relatively moving of workbench and instrument 3.After machining, allow instrument 3 keep out of the way (Fig. 1 (c)) laterally.

In addition, in front and back, carry out chamfer machining (e of Figure 10, f) with bight 1a, the 1b of 17,17 pairs of workpiece of above-mentioned bight chamfering abrasive wheel to the processing of the edge shown in (Fig. 1 (b)).

Fig. 2 is the process chart of the heeling error of expression surveying work platform.State from Fig. 1 (c) of finishing first opposite edges of workpiece are processed, make workpiece 1 move, read along direction of feed two telltale marks 4 (Fig. 2 (a) and (b)) side by side along-Y direction (below of drawing) with the camera (camera of figure upper left side) in the upper camera 5 facing to camera 5.Then, by after the position of camera, upper and

lower camera

5,6 is moved on the position of first opposite edges 8 (Fig. 2 (c)) at workpiece.

Fig. 3 is the figure that the course of work of processing dimension is measured in expression.Detect the state that the operation of the gradient of workpiece is finished from Fig. 2 (c) with high accuracy, workpiece is sent to+Y direction, read with top and

lower camera

5,6 direction of feed edge 8 central portion or along the edge some position 8a of 8, from the image shown in Fig. 3 (b), measure the chamfering width c shown in Figure 10 from first edge 8, and telltale mark 4 to the chamfering line apart from a (can come out) from the coordinate Calculation of the position of measured chamfering line 7 and the telltale mark of having read 4.Chamfering width c can measure top and following width by upper and

lower camera

5,6.

When the illumination light quantity when measuring is too weak, shown in Fig. 3 (c), read these two data of chamfering line 7a on the face of a chamfering line 7 on the face of camera one side and an opposite side sometimes, at this moment, can't judge to read which bar chamfering line actually.In this case, can be radiated at the illumination that reads locational illumination light, the read line on the face of an opposite side is not read by raising.

Fig. 4 is the process chart of processing second opposite edges 9.After the measurement of first opposite edges 8 is finished, begin with the represented state of imaginary line among Fig. 4 (a), make workbench rotate 90 ° towards the direction shown in the arrow A, allow the camera 6 of below keep out of the way the outside, after the position that resets instrument 3, by workpiece 1 is sent to-Y direction with respect to instrument 3, second opposite edges 9 are carried out chamfer machining (Fig. 4 (b)).Owing to when first opposite edges 8 of manuscript 1, all four angles have all been processed, therefore when processing second opposite edges 9, have no longer needed to carry out the chamfer machining in bight.After the process finishing, make instrument 3 keep out of the way (Fig. 4 (c)).

Fig. 5 is when being illustrated in processing second opposite edges 9, the process chart that the heeling error of workbench is carried out accurate measurement.Because this course of work is identical with the said course of work among Fig. 2 (a), so only represented the corresponding figure with Fig. 2 (a).

Fig. 6 is the process chart that the processing dimension of second opposite edges 9 is measured in expression.In the present embodiment, measure at the chamfer dimesion of this across corner.Promptly, read the central portion at the edge 9 on forward and backward

bight

1a, 1b and the direction of feed with the

camera

5,6 of upper and lower, perhaps some position 9a of 9 along the edge, from the image shown in Fig. 6 (b), (c) with identical image shown in Fig. 3 (b), measure chamfer dimesion e, the f in bight shown in Figure 10 and from the chamfering width d of second opposite edges 9 and distance b from telltale mark 4 to chamfering line 7.When this measurement finishes, because workpiece 1 is got back to the position of moving at first in the facing attachment, so, it is taken out of in the next operation by being arranged on the device that transports on the facing attachment.

Like this, after measuring to test piece or by the workpiece surveyed sample, according to its measured value, calculate the angle modification value and the correction value of instrument 3 on width and above-below direction of necessary workbench 2, carry out afterwards in the process of sheet material processing, with the command value that the correction value of calculating is come the Modifying NC device, just can set the position of workbench angle and instrument in the position of width X and above-below direction Z, process again.Processing to the sheet material of not implementing these measurements is to be undertaken by following two kinds of courses of work: the course of work of first opposite edges of manuscript 1; With the sheet material half-twist of Fig. 4 and the course of work that second opposite edges are processed.Finished the position of the sheet material of Fig. 4 (c) that second opposite edges are processed, with the position of moving into of sheet material be same position, utilization is arranged on this locational device of taking out of common sheet material of moving into, and just can take out of the workpiece of test piece and sampling check.

Claims

1. the measuring method of the chamfer dimesion in the facing attachment, telltale mark is attached on the position on leg-of-mutton three summits that meet at right angles on the sheet material, and be benchmark with the position that is loaded in the above-mentioned mark that camera was read on the facing attachment, four edges to above-mentioned sheet material carries out chamfer machining, it is characterized in that

Read be attached to sheet material with respect to two above-mentioned marks on the direction of the direction of feed quadrature of instrument, determine the direction of above-mentioned sheet material with respect to direction of feed, the lateral edges parallel with this direction of feed processed, measure in the operation first, this sheet material is carried to the direction of sending back to, read two above-mentioned marks that are attached on the direction of feed by a camera in above-mentioned two cameras, detect these two and be marked at and meet at right angles position poor of direction of direction of feed; Measure in the operation second,, send this sheet material to, detect the processing dimension of this lateral edges with above-mentioned two cameras after above-mentioned camera movement is to the position of the lateral edges that reads this sheet material.

2. the measuring method of the chamfer dimesion in the facing attachment as claimed in claim 1 is characterized in that,

Be provided for reading the lower camera (6) of the lateral edges lower surface of above-mentioned sheet material, measure in the operation above-mentioned second, after on the position that this lower camera is moved to the lateral edges that reads above-mentioned sheet material, send this sheet material to, and with two above-mentioned cameras and two upper and lower processing dimensions that above-mentioned lower camera is come the detection side edge.

3. the modification method of the chamfer dimesion in the facing attachment, telltale mark is attached on the position on leg-of-mutton three summits that meet at right angles on the sheet material, position with the above-mentioned mark that upper camera was read above the sheet material mounting workbench that is arranged on facing attachment is a benchmark, four edges to above-mentioned sheet material carries out chamfer machining, it is characterized in that

Be provided for reading the lower camera (6) of the lateral edges lower surface of above-mentioned sheet material, read be attached to sheet material with respect to two above-mentioned marks on the direction of the relative direction of feed quadrature of instrument, determine the direction of above-mentioned sheet material, the lateral edges parallel with this direction of feed processed with respect to direction of feed; Measure in the operation first, this sheet material is carried to the direction of sending back to, read two above-mentioned marks that are attached on the direction of feed, detect these two and be marked at and meet at right angles position poor of direction of direction of feed by a camera in above-mentioned two upper camera; Measure in the operation second, after above-mentioned upper camera and lower camera are moved to the position of the lateral edges that reads this sheet material, send this sheet material to, detect the upper and lower processing dimension of this lateral edges with above-mentioned two upper camera and two lower camera;

Measure in the operation detected two according to first and be marked at and meet at right angles position poor of direction of direction of feed, calculate the angular error of above-mentioned workbench; Measure the poor of the upper and lower processing dimension of detected lateral edges in the operation, the height error of computational tool according to above-mentioned second;

With the above-mentioned angular error of calculating, revise the command value of workbench angle, with the above-mentioned height error of calculating, the command value of coming the truing tool height.