JP2009214289A - Copy grinding method and apparatus for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform highly accurate grinding reflecting the condition of an actual workpiece and a grindstone in real time using an imaging means and a control device. <P>SOLUTION: The grinding method includes: creating NC machining data in advance based on graphic data; imaging the actual workpiece 7 and grinding part of the grindstone 3 by the imaging means 9; displaying the NC machining data, a workpiece image and a grindstone image by the control device 17 on a screen 25 of a display device 27 as a machining line 33, the workpiece image 35 and a grindstone figure 37, with the machining line 33 and the workpiece image 35 being superposed, and grinding the workpiece 7 with the actual grindstone 3 manually or automatically while checking on-screen machining motion of machining of the workpiece image 35 by the grindstone image or the grindstone figure 37 based on the machining line 33 on the displayed screen 25. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a copying grinding method and an apparatus thereof, and in particular, performs high-precision grinding of a workpiece by reflecting an actual workpiece mounting state and the shape of a grindstone using an imaging means such as a CCD camera and a control device such as a personal computer. The present invention relates to a copy grinding method and an apparatus therefor.

  Referring to FIGS. 13 and 14, a conventional copying grinder 101 grinds a workpiece 107 fixed on a table 105 while a rotating disk-shaped grindstone 103 moves. The front grinding portion is magnified 20 times, 25 times, or 50 times by the lens 111 of the projector 109 provided above and projected onto the screen 113 (for example, a size of 540 × 420 mm). A chart paper 115 drawn by a plotter 20 times, 25 times, or 50 times is pasted on the screen 113. At this time, the processing line 117 drawn on the chart paper 115 is pasted in accordance with a predetermined position of the work image 119 on the screen 113. Accordingly, the position of the processing line 117 of the chart paper 115 is displayed on the work image 119 on the screen 113.

  Next, the operator moves the grindstone image 121 based on the machining line 117 while looking at the screen 113, that is, moves the actual grindstone 103 to perform grinding. On the screen 113, the hatched portion of the work image 119 is ground. That is, the grindstone 103 is moved in the X and Y directions and the upper and lower Z directions on a plane. For example, the grindstone 103 moves up and down in the Z direction from the workpiece 107 and moves in the X and Y directions. The part of the workpiece 107 is ground. By repeating the above operation, the entire workpiece 107 is ground.

  In the above-described grinding process, first, roughing is performed up to the front of the processing line 117 using the grindstone 103 for roughing. Thereafter, finishing is performed along the position of the processing line 117 using the finishing grindstone 103. This copy grinding may be performed manually or by NC processing. In any case, in the NC machining, the work 107 and the grindstone 103 are enlarged and projected on the screen 113, and the work image 119 and the grindstone image 121 are displayed. Can be processed accurately. Moreover, in the conventional grinding process, the NC machining data is created based on the figure without considering the inclination of the workpiece 107.

  Patent Document 1 corresponds to such a copying grinding machine 101. Note that Patent Document 1 describes that the details of a grinding portion are measured with high accuracy using a CCD camera in addition to the above projector. In other words, while the entire shape of the work is visually observed by the projector, the precise measurement of the details is performed by the CCD camera, and numerical data obtained by processing the image of the CCD camera by the image processing apparatus is output. It is described to control.

In Patent Document 2, when a grindstone grinds a workpiece gripped on a table based on an NC machining program, first, trial grinding is performed on a dummy workpiece based on the NC machining program. The processing shape of the dummy workpiece is measured with a measuring device (CCD camera). From this measurement result, the suitability of the grinding wheel shape for the desired grinding process is judged. If it is not suitable, after dressing the grinding wheel, dummy workpiece machining and measurement are performed again, and the actual workpiece is ground based on the NC machining program. Processing is performed.
JP-A-8-197405 JP-A-8-192358

  By the way, in the conventional copy grinding machine 101, the lens 111 and the screen 113 of the projector 109 are expensive, and the grinding process requires high precision particularly in detail, but the projector 109 has a problem that it is slightly distorted. there were. Furthermore, since the magnification of magnification by the lens 111 of the projector 109 is currently fixed at 20 times, 25 times, and 50 times, there is a limit to high-precision grinding. In addition, since it is necessary to create the chart paper 115 drawn 20 times, 25 times, or 50 times by the plotter, it is troublesome, and it is necessary to align the chart paper 115 with the work 107 when the chart paper 115 is attached to the screen 113. As a result, there is a problem that the alignment accuracy and work efficiency are not good.

  Further, even if Patent Document 1 describes that the details of a grinding portion are measured with high accuracy using a CCD camera, it is used in combination with a projector, and how is the numerical data of the image by the CCD camera used? It is not described specifically whether to use the NC control.

  In Patent Document 2, a measuring device (CCD camera) measures the processing shape of a dummy workpiece in order to perform optimum dressing on a grindstone.

  The present invention performs high-precision grinding of a workpiece by reflecting a machining simulation, an actual workpiece mounting state, a machining state, and a grinding wheel shape in real time using an imaging means such as a CCD camera and a control device such as a personal computer. For the purpose.

In order to solve the above-mentioned problems, the profile grinding method of the present invention creates NC graphic data based on graphic data in advance, and images an actual workpiece and a grinding portion of a grindstone with an imaging means,
The NC graphic data, the work image, and the grindstone image are displayed on the screen of the display device by the control device so as to overlap the processing line, the work image, and the grindstone image.
The workpiece is ground manually or automatically with an actual grindstone while confirming the on-screen machining operation for machining the workpiece image with the grindstone image based on the machining line on the displayed screen. is there.

The profile grinding method of the present invention creates NC graphic data based on graphic data in advance and images an actual workpiece and a grinding portion of a grindstone with an imaging means.
The NC graphic data, the work image, and the grindstone image are displayed on the screen of the display device by the control device so as to overlap the processing line, the work image, and the grindstone image.
An NC machining program is created based on the machining line on the displayed screen with the grinding wheel graphic converted into graphic data, and the grinding wheel trajectory is simulated after overlaying the grinding wheel graphic and its movement graphic on the workpiece image. The workpiece is automatically ground with an actual grindstone based on the NC machining program.

  Further, in the profile grinding method of the present invention, in the profile grinding method, the grindstone image is obtained by imaging a grinding trace obtained by grinding a test material with an actual grindstone or an actual grindstone, and vectoring the captured image. It is preferable to convert the data.

  The profile grinding method of the present invention is the profile grinding method according to the above profile grinding method, wherein the grindstone figure is obtained by imaging the machining locus data left uncut by grinding with an imaging means, and based on the imaged machining locus data. It is preferable to calculate the wear amount of the whetstone and to convert the image of the whetstone shape after the actual wear calculated based on the calculated wear amount into vector data.

The profile grinding apparatus of the present invention includes a disk-shaped grindstone that rotates and moves to grind a workpiece fixed on a table,
Imaging means for imaging the grinding wheel and the grinding portion of the workpiece,
A first arithmetic unit that calculates to create NC graphic data based on graphic data, and a processing line, a work image, and a grindstone graphic on the screen of the NC graphic data, work image, and graphic data converted into graphic data. A display device that displays and displays the processing line and the work image in an overlapping manner;
It is characterized by comprising.

  Further, the profile grinding apparatus of the present invention is the profile grinding apparatus, wherein the control unit performs NC processing on-screen processing operation for processing a workpiece image with the grindstone graphic based on the processing line on the screen of the display device. It is preferable to include a second arithmetic unit that calculates to convert the program into a program and a command unit that gives a command to grind an actual workpiece with a grindstone based on the NC machining program.

  Further, the profile grinding apparatus according to the present invention is the profile grinding apparatus, wherein the control unit is configured to preliminarily grind the grinding wheel on the screen of the display device based on the NC machining program calculated by the second arithmetic unit. A third arithmetic unit having a function of giving a command for performing a simulation for processing a workpiece image with a figure, and performing calculation to create a corrected NC processing program reflecting the content when the processing operation on the screen of the simulation is corrected It is preferable to provide.

  As will be understood from the means for solving the problems as described above, according to the profile grinding method and apparatus of the present invention, the manual method eliminates the need for creating chart paper as in the prior art, and saves labor. Cost can be reduced. The enlargement ratio of the image is not limited to 20 times, 25 times or 50 times as in the conventional case, but can be freely set to an arbitrarily large magnification, for example, up to about 600 times. It can be carried out. Further, since an expensive screen as in the prior art is not required, the profile grinding apparatus can be made compact.

  Further, according to the profile grinding method and apparatus of the present invention, in the automatic method, in addition to the effects of the manual method described above, the on-screen processing operation is performed while viewing the processing line, the work image and the grindstone figure displayed on the screen. An NC machining program can be created by setting, and grinding can be automatically performed based on the NC machining program.

  In addition, since the actual grindstone is imaged by the imaging means and vector-converted, the actual grindstone shape is drawn in real time, so that it is possible to prevent a reduction in grinding accuracy due to the reduction of the grindstone. Further, since the NC machining program is created based on the machining line positioned in accordance with the position and inclination of the workpiece image, it is possible to perform machining with higher accuracy than the NC machining program created only with figures.

  Moreover, since the on-screen machining operation of the grindstone figure with respect to the workpiece image displayed on the screen of the display device can be confirmed in advance, an NC machining program creation error can be eliminated and the collision between the workpiece and the grindstone can be prevented. be able to.

  Embodiments of the present invention will be described below with reference to the drawings.

  Referring to FIGS. 1A and 1B, the profile grinding apparatus 1 according to this embodiment grinds a workpiece 7 fixed on a table 5 while a rotating disk-shaped grindstone 3 moves. Thus, the workpiece 7 and the grinding portion at the tip of the grindstone 3 are imaged by, for example, a CCD camera 9 as an imaging means provided above. An illumination device 11 is provided on the left and right sides of the CCD camera 9 or below the workpiece.

  Further, the grindstone 3 is moved by the grindstone driving device 13 in the X direction, the Y direction, and the upper and lower Z directions which are orthogonal to each other on a plane. For example, the grindstone 3 is supported by a grindstone head (not shown). The grindstone head is moved in the X direction by an unillustrated X axis table constituting the grindstone driving device 13, in the Y direction by the Y axis table, and in the Z direction by the Z axis table. Moved to. The grindstone driving device 13 is connected to an NC control device 15 that controls the operation thereof, and the NC control device 15 is connected to a main control device 17 that controls the entire grinding process.

  The CCD camera 9 includes image processing software 19 for processing an image captured by the CCD camera 9. In this image processing software 19, an image picked up by the CCD camera 9 is converted into vector data to create a grindstone figure.

  Referring also to FIG. 2, the main controller 17 is provided with a CPU 21 as a central processing unit. The CPU 21 includes an input device 23 such as a keyboard and a touch panel for inputting various data, programs, and the like. A display device 27 having a screen 25 such as a CRT or a liquid crystal, and a memory 29 for storing a program and various detection data inputted from the input device 23, an image subjected to the image processing, an NC processing program, etc. Is provided.

  Further, the CPU 21 is connected to a first arithmetic unit 31 that calculates to generate NC graphic data with position coordinates such as X-axis and Y-axis coordinates based on the graphic data. The display device 27 displays the NC graphic data, the work image data, and the grindstone graphic created by the first arithmetic unit 31 on the screen 25, the machining line 33 (NC graphic data), the work image 35, and the grindstone. It is displayed as a graphic 37. Further, the display device 27 displays the processing line 33 and the work image 35 in an overlapping manner.

  Further, the CPU 21 calculates a second on-screen processing operation for processing the workpiece image 35 with the grindstone graphic 37 on the screen 25 of the display device 27 based on the processing line 33 to be converted into an NC processing program. An arithmetic unit 39 is connected to a command unit 41 that gives a command to the NC control unit 15 to grind the actual workpiece 7 with the grindstone 3 based on the NC machining program.

  The second arithmetic unit 39 is a screen set according to the grinding process setting conditions input by the input device 23 based on the processing line 33 on the screen 25 of the display device 27, the workpiece image 35, and the grindstone figure 37. It has a function to calculate the upper machining operation to convert it into an NC machining program.

  Further, the command unit 41 gives a command to perform a simulation for machining the workpiece image 35 with the grindstone figure 37 on the screen 25 of the display device 27 in advance based on the NC machining program calculated by the second arithmetic unit 39. Has the function to give.

  Further, the CPU 21 calculates a third calculation for creating a modified NC machining program reflecting the contents when the machining operation on the screen is corrected when a simulation is performed according to the command of the command unit 41. A device 43 is connected.

  A profile grinding method using the profile grinding apparatus 1 of this embodiment with the above-described configuration will be described with reference to the drawings. Note that there are a manual machining method and an automatic machining method as the copy grinding method.

  First, the manual processing method will be described.

  Referring to FIGS. 1 and 3 together, the NC graphic data created based on the graphic data in advance by the first arithmetic unit 31 of the main controller 17 is indicated by a one-dot chain line on the screen 25 of the display device 27. Is displayed as a processing line 33. On the other hand, the grinding part of the actual workpiece 7 and the grindstone 3 is imaged by the CCD camera 9 and displayed on the screen 25 of the display device 27 as a workpiece image 35 and a grindstone image 37 (37A). At this time, the processing line 33 is displayed superimposed on a predetermined position of the work image 35.

  Next, the operator moves the grindstone 3 based on the processing line 33 while performing the grinding process while looking at the screen 25 of the display device 27. That is, the grindstone 3 is moved in the X and Y directions and the up and down Z directions on the plane. For example, as shown in FIGS. While moving up and down in the direction, it is moved to desired positions in the X and Y directions. By repeating the above operation, the entire workpiece 7 is ground.

  In the above grinding process, first, roughing is performed up to the front of the processing line 33 using the roughing grindstone 3A. At this time, when the operator moves the actual roughing grindstone 3A based on the processing line 33 while looking at the screen 25 of the display device 27, the grinding operation of the roughing grindstone 3A is simultaneously performed by the CCD camera 9. Since it is displayed on the screen 25 as the imaged roughing grindstone image 37A, it is displayed on the screen 25 of the display device 27 by the grinding operation of the real-time roughing grindstone image 37A as shown in FIG. .

  After this roughing is finished, finishing is performed using the finishing grindstone 3B. The operator performs the finishing process based on the processing line 33 while viewing the real-time finishing grindstone image 37 </ b> B on the screen 25 of the display device 27. At this time, as shown in FIG. 5, on the screen 25 of the display device 27, it is possible to perform high-precision grinding by further enlarging the grinding portion by increasing the magnification.

  In FIG. 5, it seems that the processing line 33 and the ground part do not coincide with each other. However, since the image has a high magnification of, for example, 100 times, the actual work 7 is subjected to high-precision grinding.

  Therefore, the manual copy grinding method of this embodiment has the following effects. That is, there is no need to create chart paper as in the conventional method. The magnification of the workpiece image 35, the roughing grindstone image 37A, and the finishing grindstone image 37B is not limited to 20 times, 25 times, or 50 times as in the related art, and for example, the magnification can be set up to about 600 times. Further, since the enlargement ratio can be increased, more accurate grinding can be performed. Furthermore, since the conventional expensive screen is not required, the profile grinding apparatus 1 can be made compact.

  Next, an automatic processing method will be described. Detailed description of the same parts as the manual processing method described above will be omitted.

  Referring to FIGS. 1 and 6 together, the NC graphic data, the work image, and the grindstone graphic are displayed on the screen 25 of the display device 27 as a processing line 33, a work image 35, and a grindstone graphic 37.

  On the screen 25 of the display device 27, as shown in FIG. 6, a dialog box 45 for rough machining for setting various grinding conditions is displayed. In this dialog box 45, for example, a parameter diagram 47 of the grindstone to be used, the thickness T of the roughing grindstone 3A, and the radius of curvature R of the corner of the grindstone 3A are displayed at the center of the upper stage. In FIG. 6, T is 1 mm and R is 0.01 mm. The upper right column displays the settings for the X and Y axes.

  In addition, an input unit for creating NC data is provided at the center of the middle stage, and a positional relationship diagram 49 between the workpiece image 35 and the grindstone graphic 37A converted into graphic data is displayed. Is displayed so that the finishing allowance F with respect to the processing line 33 of the workpiece image 35, the fast feed position A of the grindstone figure 37A, the original position H at which the grindstone figure 37A starts to move, and the feed pitch P of the grindstone figure 37A can be input. Has been. In FIG. 6, F indicates 0.05 mm, A indicates that the workpiece image 35 is fast-forwarded to 0.5 mm, and P indicates 0.8 mm. In the lower row, other various setting condition items are displayed.

  As described above, by inputting the numerical values of the various items in the dialog box 45 on the screen 25 by the input device 23, the grinding process setting conditions are input, and the second arithmetic unit 39 of the main controller 17 automatically The NC machining program for rough machining is created. In this case, since the workpiece image 35 cannot be set exactly along the X and Y axes, the NC machining program is created based on the machining line obtained by moving and rotating the machining line 33 to the position of the workpiece image 35.

  In this automatic machining method, the command of the command unit 41 can be given to the NC control device 15 based on the NC machining program created by inputting as described above, and grinding can be performed. When the command is given, the command is given from the command unit 41, and the simulation can be performed only on the screen 25 of the display device 27 before the actual grinding process is performed.

  For example, when a roughing simulation is performed using the roughing grindstone 3A, when the roughing grindstone figure 37A shown by hatching in FIG. After being fast-forwarded to position A, grinding is performed at a low speed to a position with a finishing allowance of 0.05 mm before the processing line 33. As described above, the actual grinding process is such that the roughing grindstone 3A moves upward or downward in the Z-axis direction for grinding.

  After this grinding process is completed, the roughing grindstone figure 37A returns to the original position H and is moved in the X-axis direction at a feed pitch P of 0.8 mm. At this position, the next grinding process is performed by moving in the Y-axis direction in the same manner as described above. In FIG. 6, since the thickness T of the grindstone 3A is 1 mm and the feed pitch P is 0.8 mm, the allowance for grinding is 0.2 mm.

  FIG. 6 shows a result obtained by repeating the grinding operation using the grindstone graphic 37A as described above. Since the ground portion of the workpiece image 35 is white, how is it performed at the simulation stage? It can be confirmed whether it is rough processed.

  Referring to FIG. 7, after the rough machining simulation is finished, the finishing machining simulation is performed using the finishing grindstone graphic 37 </ b> B converted into graphic data. Also in this case, a dialog box 51 for finishing is displayed on the screen 25 of the display device 27 for setting various grinding conditions. This dialog box 51 is displayed so that various setting condition items can be input as in the case of FIG. For example, in the center of the upper stage, the parameter diagram 47 of the grindstone to be used, the thickness T of the finished grindstone figure 37B, the opening angle V of the grindstone tip, and the curvature radius R of the grindstone tip are displayed. In FIG. 7, the parameters of the three finishing grindstones 3B are displayed, and the left grindstone figure 37B is selected. T is 1 mm, V is 10 °, and R is 0.05 mm. The upper right column displays the settings for the X and Y axes.

  Further, a positional relationship diagram 49 between the NC work image 35 and the grindstone graphic 37B is displayed at the center of the middle stage, and a fast-forwarding position A of the grindstone graphic 37B can be input on the right side based on the positional relationship diagram 49. Is displayed. FIG. 7 shows a fast-forward position where A is 0.05 mm. In the lower row, other various setting condition items are displayed.

  The setting conditions for grinding are input by inputting the numerical values of the above-mentioned various items by the input device 23, and the NC processing program for finishing is automatically created by the second arithmetic unit 39 of the main controller 17. It becomes.

  In the case of performing a finishing simulation only on the screen 25 of the display device 27 based on the NC machining program created as described above, when grinding with the finished grinding wheel graphic 37B shown by hatching in FIG. Is ground based on the processing line 33. Further, the grindstone figure 37B is repeatedly moved in the X-axis direction and the Y-axis direction based on the processing line 33, and finishing is performed. In FIG. 7, the middle of the finishing process is shown, and the surface of the work image 35 on the right side from the position of the right grindstone figure 37 </ b> B is in a state of rough machining. Finishing is performed with such a rough surface facing rightward.

  As shown in FIG. 7, since the ground portion of the workpiece image 35 is white, it can be confirmed how it is finished in the simulation stage. If necessary correction is performed at the stage of the simulation, the correction operation is automatically corrected by the third arithmetic unit 43 of the main controller 17 to create a corrected NC machining program.

  After confirming that the grinding process is surely performed by the above simulation, a command is given to the NC control unit 15 from the command unit 41 of the main control unit 17 based on the created NC processing program, and the automatic control is actually performed. Grinding will be performed.

  In the automatic machining method of this embodiment, the NC machining program for machining the workpiece image 35 with the grindstone figure 37 on the screen 25 of the display device 27 based on the machining line 33 without performing a simulation as described above. And can be ground based on the NC machining program. In addition, grinding can be performed simultaneously with the creation of the NC machining program.

  Alternatively, as described above, grinding can be performed based on the NC machining program and the finishing NC machining program created according to the grinding machining setting conditions input on the screen 25 of the display device 27.

  In addition, after the NC machining program is automatically created, if a more highly accurate machining is required, it is also possible to perform the corrected product direct copy grinding based on the screen 25 of the display device 27 shown in FIG.

  In addition, referring to FIG. 8, the shape of the actual grindstone 3 changes as it is used for grinding, so that it is different from the theoretical shape of the grindstone 3. In this embodiment, since the actual grindstone 3 is imaged by the CCD camera 9 and is a vector-converted finishing grindstone figure 37B, the grind processing is performed reflecting the shape of the actual tip of the grindstone 3 in real time. Can do. Therefore, more accurate grinding is possible.

  As another example, as shown in FIG. 9 (A), when grinding is performed on a material 51 that can be easily cut with graphite or the like with a finishing grindstone 3B that is actually used, FIG. 9 (B) shows. As shown, this grinding mark 53 has the same shape as the contour shape of the finishing grindstone 3B. Therefore, the grinding mark 53 can be imaged by the CCD camera 9 and the shape of the grinding mark 53 can be ground on the screen 25 of the display device 27 with the finishing grindstone figure 37B. The grinding mark 53 of the material 51 is effective in that the contour of the grindstone 3B can be clearly displayed from an image obtained by capturing the actual finishing grindstone 3B with the CCD camera 9.

  Furthermore, since the actual grindstone 3 is worn out when various grinding processes are performed, if the worn actual grindstone 3 is continuously used, the shape of the product is not accurate. Therefore, as another example, as shown in FIG. 10A, a processed image is acquired by the CCD camera 9, and the outline of the acquired image data is indicated by a dotted line in FIG. As shown, the digitized uncut data is obtained.

  Then, as shown in FIG. 10C, when the DXF data and the digitized data are superimposed, the difference generated becomes the actual uncut amount. In FIG. 10C, the difference between the DXF data at a certain arbitrary place and the acquired data is the uncut amount a or b.

  Next, as shown in FIGS. 11A and 11B, the positions C1, C2, C3, and C4 where the grindstone 3 before abrasion hits at an arbitrary position on the processing are obtained, and the positions are measured. The acquired position is reflected as the wear amount of the grindstone 3.

  Specifically, as shown in FIG. 11B, the wear values D1, D2, and D3 of the respective shapes within the shape of the grindstone 3 at certain arbitrary positions C1, C2, and C3 are obtained. In the case of the position (2) of the grindstone 3 in FIG. 11 (B), all the plurality of coordinates of the shape D2 in (2) are extracted. In addition, although there are three places in the explanation of the figure, the pitch value is actually obtained by calculation, and the coordinate value is obtained more finely.

  As shown in FIG. 12A, the wear shape is taken out by superimposing the data acquired in FIG. 11B on the original shape of the grindstone 3. Then, when the innermost wear value in the original shape is sequentially obtained and taken out from the overlapped coordinate values, as shown in FIG. 12B, when the taken out coordinate values are connected, a solid line The actual whetstone shape after wear as shown is required.

  As shown in FIG. 12C, data is created again for the read DXF data from the actual grinding wheel shape calculated in FIG. 12B. At this stage, the NC data is data considering the wear of the grindstone, so that grinding can be performed with higher accuracy if grinding is performed based on the NC data. In addition, in FIG.12 (C), the shape of a dotted line is a shape before abrasion.

  From the above, the automatic processing method of this embodiment has the following effects.

(1) Since the on-screen machining operation of the grindstone figure 37 for the workpiece image 35 displayed on the screen 25 of the display device 27 can be confirmed in advance, there is no NC machining program creation error.

(2) Since the on-screen processing operation of the grindstone figure 37 with respect to the work image 35 displayed on the screen 25 of the display device 27 can be confirmed in advance, collision between the work 7 and the grindstone 3 can be prevented.

(3) Since NC machining data can be created while looking at the work image 35 and the grindstone figure 37 displayed on the screen 25 of the display device 27, an NC machining program similar to the manual machining method can be created.

(4) Since the actual grindstone 3 is captured by the CCD camera 9 and vector-converted, an NC machining program can be created reflecting the actual shape of the tip of the grindstone 3 in real time. It is possible to prevent a decrease in grinding processing accuracy due to.

(A) is a schematic explanatory view of the profile grinding apparatus of the embodiment of the present invention, and (B) is a plan view taken along line IB-IB in (A). It is a block diagram of the configuration of the control device. It is a schematic explanatory drawing of the roughing in a manual processing method. It is a schematic explanatory drawing of the roughing in a manual processing method. It is a schematic explanatory drawing of the finishing process in a manual processing method. It is a schematic explanatory drawing of rough processing in an automatic processing method. It is a schematic explanatory drawing of the finishing process in an automatic processing method. It is a top view which shows the shape of a grindstone. (A) is a top view when grinding is performed in order to make a grinding mark on a material with an actual grindstone, and is a plan view showing a grinding mark of the actual grindstone. (A) is the figure which imaged the product shape and grindstone trajectory after processing with the CCD camera, (B) is the explanatory drawing which digitizes the image data which is acquired in (A), (C) is the DXF data and digitization It is the figure which showed the state which piled up the performed data. (A) is explanatory drawing for calculating | requiring the abrasion amount of a grindstone, (B) is an enlarged view of (A). (A) is explanatory drawing which takes out the wear shape by superimposing the shape of the grindstone acquired on the original grindstone shape, (B) is the figure which showed the shape of the grindstone which it re-calculated, (C) is (B). It is the figure which showed the example processed with the grindstone shape which was calculated | required again. It is a schematic explanatory drawing of the conventional profile grinding apparatus. It is a top view of the arrow XIV-XIV line | wire of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Copy grinding apparatus 3 Grinding wheel 5 Table 7 Work 9 CCD camera (imaging means)
13 Wheel drive device 15 NC control device 17 Main control device 19 Image processing software 21 CPU
23 Input Device 25 Screen 27 Display Device 29 Memory 31 First Computing Device 33 Processing Line 35 Work Image 37 Grinding Wheel Image or Grindstone 39 Second Computing Device 41 Command Unit 43 Third Computing Device 45 Dialog Box 51 Dialog Box

Claims (7)

While creating NC graphic data based on the graphic data in advance, the actual workpiece and grinding part of the grindstone are imaged by the imaging means,
The NC graphic data, the work image, and the grindstone image are displayed on the screen of the display device by the control device so as to overlap the processing line, the work image, and the grindstone image.
Copy grinding characterized in that a workpiece is ground manually or automatically with an actual grindstone while confirming the on-screen machining operation for machining the workpiece image with the grindstone image based on the machining line on the displayed screen. Method. While creating NC graphic data based on the graphic data in advance, the actual workpiece and grinding part of the grindstone are imaged by the imaging means,
The NC graphic data, the work image, and the grindstone image are displayed on the screen of the display device by the control device so as to overlap the processing line, the work image, and the grindstone image.
An NC machining program is created based on the machining line on the displayed screen with the grinding wheel graphic converted into graphic data, and the grinding wheel trajectory is simulated after overlaying the grinding wheel graphic and its movement graphic on the workpiece image. A copy grinding method comprising: confirming and automatically grinding a workpiece with an actual grindstone based on the NC machining program.   The said grindstone figure images the grinding trace obtained by grinding a test material with an actual grindstone or an actual grindstone, and converts this imaged image into vector data. Copy grinding method.   The grindstone figure is obtained by taking an image of machining trajectory data remaining after grinding and by imaging means, calculating the wear amount of the original grindstone based on the imaged machining trajectory data, and calculating the calculated wear amount. 3. The profile grinding method according to claim 2, wherein an image of a grindstone shape after actual wear calculated based on the image is converted into vector data. A disc-shaped grindstone that rotates and moves to grind the workpiece fixed on the table;
Imaging means for imaging the grinding wheel and the grinding portion of the workpiece,
A first arithmetic unit that calculates to create NC graphic data based on graphic data, and a processing line, a work image, and a grindstone graphic on the screen of the NC graphic data, work image, and graphic data converted into graphic data. A display device that displays and displays the processing line, the workpiece image, and the grindstone graphic in an overlapping manner, and
A copying grinding apparatus characterized by comprising:   The control device includes: a second arithmetic device that calculates to convert an on-screen processing operation for processing a workpiece image with the grindstone graphic into an NC processing program based on the processing line on the screen of the display device; and the NC processing 6. The profile grinding apparatus according to claim 5, further comprising a command unit that gives a command to grind an actual workpiece with a grindstone based on a program.   The control device has a function of giving a command for performing a simulation for processing a workpiece image with a grindstone graphic on the screen of the display device in advance by the command unit based on the NC machining program calculated by the second arithmetic device. The copying apparatus according to claim 5, further comprising a third arithmetic unit that performs calculation so as to create a modified NC machining program that reflects a content when the machining operation on the screen of the simulation is modified. Grinding equipment.

Images