JP2007326196A - Machining tool inspecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machining tool inspecting device which precisely inspects the outside shape of the machining tool even if foreign articles such as chips and machine oil is attached to the machining tool. <P>SOLUTION: The machining tool inspecting device comprises: shooting means 301, 302 shooting a tip end part of a drill and outputting an image signal; and an image processing means 350 producing and processing a binary image data according to the image signal. The image processing means 350 comprises: detecting means S3 to S6 detecting image edge points; means S7, S9 removing the image edge points estimated to be except for the image edge points corresponding to the outline of the drill from the plurality of the image edge points; means S8, S10 deciding a virtual frame indicating the outline of the drill according to the image edge points remaining after removing; and means S12, S13 producing the outside shape information of the drill on the basis of a part in an area estimated to be an area in the drill by the virtual frame of the binary image data. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tool inspection apparatus for inspecting the outer shape of a tool such as a drill or an end mill set in a processing machine.

  In a processing machine that drills or cuts a workpiece with a tool such as a drill or end mill, the tip of the drill or end mill may be worn away or chipped due to the processing. There is. In this way, if the tool is sagted or chipped, normal processing cannot be performed. Therefore, inspection and management of the outer shape of the tool are important.

  By the way, in recent years, a drilling machine capable of processing a hole having a diameter of about 10 μm to 100 μm with an accuracy of a tolerance of several μm has been realized (for example, see Non-Patent Document 1). In addition, the resolution of the drill alignment in this processing machine is also 1 μm or less. In such a processing machine, the drill used for drilling is extremely fine (10 μm to 100 μm in diameter), so that the tip portion is liable to sag and chip, and inspection and management of its outer shape are particularly important. However, it is extremely difficult to visually determine the sag or chipping of the tip of such a fine tool.

  Conventionally, there is a measuring apparatus using laser light. Using such a measuring device, for example, it can be inspected as follows whether or not the drill is bent or not.

A drill having a regular shape (reference drill) is set on the machine tool, and the set drill is positioned at the origin (the origin in the vertical direction (Z-axis direction)) recognized by the machine tool. Then, the laser beam traveling in the horizontal direction and the height position of the light receiver that receives the laser beam light are blocked by the tip of the reference drill and cannot be received by the light receiver. adjust. After the initial adjustment is made in this way, the processing operation on the processing machine is stopped regularly or irregularly, and the drill used for the processing is positioned at the origin recognized by the processing machine. Then, the laser beam having the height position adjusted is advanced toward the light receiver. At this time, if the laser beam is not received by the light receiver, it can be determined that the tip of the drill is not blunt or missing because the laser beam is blocked by the tip of the drill. . On the other hand, if the laser beam is received by the light receiver, it can be determined that the tip of the drill is dull or missing because the laser beam is not blocked by the tip of the drill. In other words, the output signal from the light receiver becomes an inspection output signal indicating the presence or absence of drill sag or chipping.
Nikkan Kogyo Shimbun Nikkan Kogyo Shimbun article dated June 26, 2003

  However, in the apparatus using laser light as described above, the cross section of the laser beam light is not a perfect circle, for example, it is a vertically long ellipse, stray light exists, and the power distribution in the optical axis of the laser beam light is It is difficult to obtain stable inspection conditions, such as irregularity and a change in the light shielding condition with respect to the laser beam light from the tip of the drill due to the deviation of the drill in the XY direction (lateral direction). For this reason, it is difficult to obtain an accurate test result.

  In addition, when inspecting the external shape of a tool such as a drill regularly (for example, whether there is a sag or chipped tip) during machining operations, chips and machine oil may It may be attached to the tip. If chips or machine oil adheres in this way, the laser beam light is blocked by the chips or machine oil, and an accurate inspection result of the outer shape of the tool cannot be obtained.

  The present invention has been made to solve such a conventional problem, and can accurately inspect the outer shape of the tool even if foreign matter such as chips or machine oil adheres to the tool. The present invention provides a tool inspection apparatus that can be used.

  A machine tool inspection apparatus according to the present invention is set on a processing machine, shoots a predetermined visual field range including a tip portion of a tool for processing a workpiece, and outputs an image signal. Image processing means for generating and processing binary image data based on the output image signal, and the image processing means includes edge point detection means for detecting an image edge point from the binary image data; Means for removing what is expected as an image edge point other than the image edge point corresponding to the contour of the tool from the plurality of detected image edge points, and the tool based on the image edge points remaining after the removal Virtual contour determination means for determining a virtual contour line representing the contour of the tool, and based on a portion of the binary image data in the region expected to be the region in the tool by the virtual contour line A configuration and a profile information generating means for generating shape information representative of a characteristic of the profile of the work tool.

  With such a configuration, what is expected as an image edge point other than the image edge point corresponding to the contour of the tool is removed from the image edge point of the binary image data representing the image in the predetermined visual field range including the tip portion of the tool. Since the virtual contour line representing the contour of the tool is determined based on the image edge points remaining after the removal, the determination is made even if chips or machine oil adheres to the tool at the time of shooting. The virtual contour line to be performed can be unaffected by the image portion corresponding to the chip, machine oil or the like. The outer shape of the tool is based on the portion in the region that is expected to be the region in the tool by the virtual contour line that is not affected by the image portion corresponding to the chip or machine oil in the binary image data. Therefore, the outer shape information can represent the outer shape characteristics of the tool itself that is not affected by chips or machine oil adhering to the tool.

  Further, in the tool inspection apparatus according to the present invention, the tool is a drill, and the contour determining means determines a straight line representing an inclined contour of the tip of the rotating drill as a virtual contour. can do.

  With such a configuration, even if chips or machine oil adheres to the tip of the drill, the outer shape information that can represent the features of the outer shape of the tip of the rotating drill itself that is not affected by the chips or machine oil You will be able to get

  Further, in the tool inspection apparatus according to the present invention, the tool is a ball end mill, and the contour determining means determines a circle representing the contour of the tip of the rotating ball end mill as a virtual contour. It can be.

  With such a configuration, even if chips or machine oil or the like adheres to the tip of the ball end mill, it can represent the characteristics of the outer shape of the tip of the rotating ball end mill itself that is not affected by the chips or machine oil. Outline information can be obtained.

  Furthermore, in the tool inspection apparatus according to the present invention, the tool is a flat end mill, and the contour determining means determines a straight line representing the contour of the tip of the rotating flat end mill as a virtual contour. can do.

  With such a configuration, even if chips or machine oil or the like adheres to the tip of the flat end mill, it can represent the characteristics of the outer shape of the tip of the rotating flat end mill itself that is not affected by the chips or machine oil. Outline information can be obtained.

  According to the tool inspection apparatus according to the present invention, even if foreign matter such as chips or machine oil adheres to the tool, the tool that is not affected by foreign matter such as chipped machine oil attached to the tool. Since it is possible to obtain external shape information that can represent the characteristics of the external shape of the tool itself, it is possible to accurately inspect the external shape of the tool even if foreign matter such as chips or machine oil adheres to the tool. Become.

  Hereinafter, a tool inspection apparatus according to the present invention will be described with reference to the drawings.

  The processing machine to which the machine tool inspection apparatus according to the present invention is applied is configured as shown in FIG.

  In FIG. 1, this processing machine 100 is a drilling machine, and a work table 120 that is movable in the X-axis direction and the Y-axis direction is provided on a base 110. Above the work table 120, a drill chuck 130 that can be rotated and moved up and down is provided. The chucking portion 142 of the drill 140 is chucked by the drill chuck 130, and the drill main body 141 following the chucking portion 142 is set vertically (horizontal in the Z-axis direction) with respect to the working table 120. A workpiece 200 as a workpiece is set on the working table 120, and the drill body 141 performs a drilling process on the workpiece 200 by lowering the chucking 130 while rotating it. The diameter of the drill main body 141 is, for example, about 50 μm, and a drilling process of about 50 μm is performed on the workpiece 200.

  A measurement unit 300 is installed at a predetermined position on the base 110. The measurement unit 300 is configured as shown in FIG.

  In FIG. 2, the measurement unit 300 includes a light source device 301 that outputs parallel light with a high-intensity LED, a lens unit 302, a CCD camera 303, a connector 304, and a camera cable 305. The lens unit 302 is composed of a high-magnification lens system, and forms an image with a field of view of, for example, 448 μm × 388 μm on the light receiving surface of the CCD camera 303. The light source device 301 is set on the base 110 so that the parallel rays to be output are parallel to the surface (XY plane) of the work table 120. The CCD camera 303 includes a high-resolution CCD and has a resolution of 1024 × 760 pixels (pixels), for example. The CCD camera 303 outputs an image signal corresponding to the image in the visual field range formed on the light receiving surface. This image signal becomes a multi-gradation (for example, 256 gradation) luminance signal for each pixel (pixel).

  When a parallel light beam is output from the light source device 301 in a state where the tip of the rotating drill main body 141 is positioned between the light source device 301 and the lens unit 302, the drill light beam of the drill main body 141 using the parallel light beam as a backlight is output. An image of the visual field range including an image portion corresponding to the shadow (representing the outer shape) of the tip portion is formed on the light receiving surface of the CCD camera 302. Then, an image signal corresponding to the formed image including the tip portion of the drill main body 141 is supplied from the CCD camera 302 to the processing unit 350 (image processing means) via the connector 304 and the camera cable 305. The processing unit 350 generates binary image data by performing predetermined threshold processing or the like on the image signal, and processes the binary image data. Further, the processing unit 350 can send predetermined signals and data to the processing machine 100 according to the processing result.

  The processing unit 350 executes an inspection process related to the outer shape of the drill 141 rotating according to the procedure shown in FIG.

The drill 140 is chucked by the drill chuck 130 and the drill 140 rotates together with the drill chuck 130. When parallel light beams are output from the light source device 301 with the tip portion of the drill main body 141 of the drill 140 rotating between the light source device 301 and the lens unit 302 positioned (backlight lighting: S1), the processing unit 350 Performs a binary image capturing process for the tip of the drill body 141 based on the image signal from the CCD camera 303 (S2). In this binary image capturing process, the multi-gradation luminance signal (image signal) for each pixel from the CCD camera 303 is binarized with a predetermined threshold value and converted into binary image data for each pixel. Data is expanded to internal memory. As a result, as shown in FIG. 5, an image portion I _D (for example, a pixel value “equivalent to black” corresponding to the shadow of the tip portion of the drill body 141 obtained by the parallel rays (backlight) from the light source device 301 is obtained. the portion) of 0 'be other image portion (background portion of the visual field range E _V, for example, binary image data representing distinguished from the pixel value corresponding to white "1") is expanded on the memory. As a result, the measurement unit 300 captures a binary image of the drill main body 141.

When binary image data represented by binary values (1 (white) or 0 (black)) for each pixel is developed on the memory in this way, the processing unit 350, for example, as shown in FIG. Then, a horizontal scan line Lsi (initial value Ls0) corresponding to the direction crossing the drill main body 141 is set on the memory (S3), and the binary image data I _D1 on the memory is scanned along the scan line Lsi. To do. In the process, for example, a point where the pixel value changes from 1 (white) to 0 (black) is detected as the left image edge point (left edge point) PLi (S4), and the pixel value changes from 0 (black) to 1 A point that changes to (white) is detected as a right image edge point (right edge point) PRi (S5). Each image edge point is detected by, for example, specifying a coordinate value on a memory where the binary image data I _D1 is developed.

  When the left edge point PLi and the right edge point PRi are detected by scanning the scan line LSi, the processing unit 350 determines whether the scan line LSi is a predetermined nth scan line LSn. (S6). If the scan line LSi is not the last n-th scan line LSn (NO in S6), a new scan line is set (S3), and the left of the new scan line is the same as described above. The edge point PL and the right edge point PR are detected (S4, S5). Thereafter, the same processing (S3 to S5) is repeatedly executed until it is determined that the processed scan line is the final nth scan line LSn (YES in S6).

In the case of the example shown in FIG. 6, foreign matter such as chips adheres to the tip of the rotating drill body 141, and the binary image data I _D1 includes portions D1 and D2 corresponding to the foreign matter. In FIG. 6, since the foreign matter attached to the tip of the drill body 141 also rotates together with the drill body 141, the portions D1 and D2 corresponding to the foreign matter are symmetrical with respect to the rotation center line (CL) on the image I _D1. It appears. As a result of the above processing (S3 to S5), the left edge points PL0, PL1, PL2,..., PLj,..., PLn are detected corresponding to the inclined contour of the tip of the drill body 141, and Right edge points PR0, PR1, PR2,..., PRj,. Based on the premise that the contour of the tip of the drill body 141 is an inclined straight line, the processing unit 350 determines left edge points PL1, PLj that are not on the inclined straight line from the detected left edge points PL0 to PLn. It removes as a singular point (S7). Then, the processing unit 350, based on the remaining left edge points PL0, PL2,..., PLn, rotates the tip of the drill body 141 that rotates a virtual line A1 (inclined straight line) that is expected to pass through the left edge points. It is determined as a virtual contour line representing the left contour of the part (S8).

  Similarly, the processing unit 350 removes, as singular points, the right edge points PR1 and PRj that are not expected to be on the inclined straight line from the detected right edge points PR0 to PRn (S9). Then, the processing unit 350, based on the remaining right edge points PR0, PR2,..., PRn, rotates the tip of the drill body 141 that rotates the virtual line A2 (inclined line) that is expected to pass through each right edge point. It is determined as a virtual contour line representing the right contour of the part (S10).

When the two virtual lines A1 and A2 representing the outline of the tip of the rotating drill body 141 are determined in this way, the processing unit 350 proceeds to the procedure shown in FIG. 4, and the intersection of the virtual lines A1 and A2 Is calculated as a virtual tip C of the drill body 141 (S11). Thereafter, the processing unit 350 sequentially scans a region between the two virtual lines A1 and A2 of the binary image (data) I _D1 developed on the memory in the horizontal direction at a predetermined interval. Edge points are detected (S12). Since the area between the virtual lines A1 and A2 that is the scanning range is an area that is expected to be within the tip of the drill body 141, the detected image edge point corresponds to the contour of the tip of the drill body 141. Will be. As described above, in the process of determining the virtual lines A1 and A2, the influence of the image portions D1 and D2 corresponding to foreign matters such as chips and machine oil adhering to the tip of the drill main body 141 has been removed. The image edge point obtained by scanning the area between the lines A1 and A2 does not correspond to the contour of the foreign matter but can be regarded as corresponding to the contour of the tip portion of the drill body 141 itself.

  When the image edge point corresponding to the contour of the tip portion of the drill body 141 is obtained in this way, the processing unit 350 obtains the contour data representing the feature of the tip portion of the drill body 141 based on the image edge point. Generate (S13). For example, contour data represented by connecting the image edge points can be generated as outline data. In this case, by comparing the contour data with the contour data obtained from the reference drill, it is possible to determine whether or not there is a sag or chipping at the tip of the drill body 141 to be inspected.

  Further, on the vertical line CL passing through the virtual tip C, the position of the lowest image edge point (which may be the position on the memory or the distance from the virtual tip C) is the drill body 141. It is also possible to obtain the outer shape data representing the true tip B. In this case, according to the position of the tip B, it can be determined whether or not the tip of the drill body 141 has a sag or a chip.

  As described above, when the outer shape data for the tip of the drill main body 141 to be inspected is generated, the output of the parallel light from the light source device 301 is stopped (backlight is turned off) (S14), and the process is terminated.

According to the measurement unit 300 provided in the processing machine 100 as described above, the left edge points PL0 to PLn and the right edge points of the binary image data I _D1 representing the image in the predetermined visual field range including the tip portion of the drill body 141. The potential image edge points of the image portions D1 and D2 corresponding to the foreign matter are removed from PR0 to PRn, and a virtual line A1 representing the left outline of the tip portion of the drill body 141 is determined based on the remaining left edge point. At the same time, since the virtual line A2 representing the right contour of the tip portion of the drill body 141 is determined based on the remaining right edge point, foreign matter such as chips and machine oil adheres to the drill body 141 during photographing. Even so, each of the determined virtual lines A1 and A2 can be unaffected by the image portion corresponding to the foreign object. In the binary image data I _D1 , the tip of the drill body 141 is based on the image edge point obtained by scanning the image area sandwiched between the virtual lines A1 and A2 that is not affected by the image portion corresponding to the foreign object. Since the outline data (for example, the contour data of the tip portion of the drill body 141 or the position of the tip B of the drill body 141) representing the feature of the outline of the portion is generated, the outline data is attached to the drill body 141. Thus, it is possible to represent the characteristics of the outer shape of the tip portion of the drill body 141 that is not affected by the foreign matter. Since the inspection result of the outer shape of the tip portion of the drill main body 141 can be obtained based on such outer shape data, it is assumed that foreign matter such as chips or machine oil has adhered to the tip portion of the rotating drill main body 141. In addition, the outer shape of the tip portion of the drill main body 141 can be inspected with high accuracy.

In the example described above, the interval between the scan lines LSi when obtaining the virtual lines A1 and A2 (see S3 to S5 in FIG. 3) is the same as when obtaining the image edge point for generating the outline data (S12 in FIG. 4). It is possible to make the interval larger than the interval between the scan lines in (see FIG.). The interval between the scan lines LSi is determined from the viewpoint that the image edge point corresponding to the foreign substance in the binary image data I _D1 can be distinguished from the image edge point corresponding to the tip portion of the drill body 141. On the other hand, the interval between scan lines when obtaining image edge points for generating outline data is determined from the viewpoint of obtaining outline data with desired accuracy.

In the example described above, the tool to be inspected is the drill 140 (drill main body 141), but the object to be inspected may be another tool. For example, in the case of a ball end mill, for example, as shown in FIG. 7A, binary image data I _D2 corresponding to the ball ed mill is obtained. In the process of sequentially scanning the binary image data I _D2 along the scan lines LS0 to LSn, the left edge points PL0 to PLn and the right edge points PR0 to PRn are detected (see S3 to S5 in FIG. 3). Thereafter, based on the premise that the contour of the tip portion of the ball end mill becomes a circular line, the left edge point PL2, which is not expected to be on the circular line, from the detected left edge points PL0 to PLn and right edge points PR0 to PRn, PLn and right edge points PR2 and PRn are removed as singular points (see S7 and S9 in FIG. 3). Then, based on the remaining left edge points PL0, PL1,..., PLj,... And the remaining right edge points PR0, PR1,. A virtual circle A that is expected to pass through the edge point is determined as a virtual contour that represents the contour of the tip portion of the ball end mill (see S8 and S10 in FIG. 3).

When the virtual circle A representing the contour of the tip of the rotating ball end mill is determined in this way, the lowest image edge point is calculated as the virtual tip C of the ball end mill (see S11 in FIG. 4). . Thereafter, an area in the virtual circle A of the binary image (data) I _D2 developed on the memory is sequentially scanned, for example, at a predetermined interval in the horizontal direction, and an edge point of the image is detected (FIG. 4). In S12). Since the virtual circle A that is the scanning range is an area that is expected to be within the tip of the ball end mill, the detected image edge point corresponds to the contour of the tip of the ball end mill.

  When an image edge point corresponding to the contour of the tip end portion of the ball end mill is obtained in this way, contour data representing the feature of the contour of the tip end portion of the ball end mill is generated based on the image edge point (in FIG. 4). (See S13). For example, contour data represented by connecting the image edge points can be generated as outline data. In this case, by comparing the contour data with the contour data obtained from the reference ball end mill, it is possible to determine whether or not there is a sag or chipping at the tip of the ball end mill to be inspected.

  In addition, the position of the lowest image edge point on the horizontal center line CL1 of the virtual circle A can be obtained as outline data representing the true tip B1 of the ball end mill. In this case, it is possible to determine whether or not there is a sag or chip at the tip of the ball end mill according to the position of the tip B1. Further, as shown in FIG. 7B, the image edge point can be detected by operating the virtual circle A in the vertical direction. In this case, the position of the end edge of the image edge point on the vertical center line CL2 of the virtual circle A can also be obtained as outline data representing the true horizontal end B2 of the ball end mill. Based on the outer shape data (B2), it is possible to determine the presence or absence of lateral sag or chipping of the ball end mill.

  In this way, even when the tool to be inspected is a ball end mill, the virtual circle A (virtual contour line) representing the contour of the tip is affected by foreign matter such as chips and machine oil. As in the case of the above-described drill 140 (drill body 141), even if foreign matter such as chips or machine oil adheres to the tip of the rotating ball end mill, the tip of the ball end mill is accurate. The outer shape of the part can be inspected.

Further, for example, in the case of a flat end mill, as shown in FIG. 8, for example, binary image data I _D3 corresponding to the flat end mill is obtained. In this case as well, from the binary image data I _D3 , the left edge point corresponding to the left end of the flat end mill and the right end of the flat end mill are the same as in the above two examples (example of drill 140 and ball end mill). Each image edge point of the corresponding right edge point and the tip edge point corresponding to the tip of the flat end mill is detected (see S3 to S5 in FIG. 3). Then, based on the premise that the contour of the tip portion of the flat end mill is a straight line, the image edge points for the image portions D5 and D6 corresponding to the foreign matter that is not expected to be on the straight line are removed from the detected image edge points. Then, three virtual lines A1, A2, A3 that are expected to pass through the remaining image edge points are determined as virtual contour lines representing the contour of the tip portion of the flat end mill (S7 to S10 in FIG. 3).

With such binary image (data) I _D3 on three virtual lines A1, A2, A3 of the flat end mill is determined, the binary image is developed on the memory (data) I _D3 of three virtual An area surrounded by the lines A1, A2, and A3 is sequentially scanned, for example, at a predetermined interval in the horizontal direction, and an edge point of the image is detected (see S12 in FIG. 4). Since the area surrounded by the three virtual lines A1, A2, and A3 serving as the scanning range is an area that is expected to be within the front end of the flat end mill, the detected image edge point is the front end of the flat end mill. It corresponds to the contour of

  When an image edge point corresponding to the contour of the tip portion of the flat end mill is obtained in this way, contour data representing the feature of the contour of the tip portion of the flat end mill is generated based on the image edge point (in FIG. 4). (See S13). For example, contour data represented by connecting the image edge points can be generated as outline data. By comparing the contour data (outer shape data) obtained in this way with the contour data obtained in the same manner for a regular (normal) flat end mill, the sag of the tip of the flat end mill to be inspected can be reduced. It becomes possible to determine the presence or absence of a chip.

  Thus, even when the tool to be inspected is a flat end mill, the three virtual lines A1, A2 and A3 (virtual contour lines) representing the contour of the tip end are made of foreign matter such as chips and machine oil. (Refer to D5 and D6 in FIG. 8.) As in the case of the above-described drill 140 (drill body 141) or ball end mill, chips, machine oil, etc. are formed at the tip of the rotating flat end mill. Even if the foreign matter adheres, the outer shape of the tip portion of the flat end mill can be inspected with high accuracy.

  As described above, the tool inspection device according to the present invention is capable of accurately inspecting the outer shape of the tool even if foreign matter such as chips or machine oil adheres to the tool. And is useful as a tool inspection device for inspecting the outer shape of a tool such as a drill or an end mill set in a processing machine.

1 is a diagram schematically showing a machine tool to which a measurement unit as a tool inspection device according to an embodiment of the present invention is applied. It is a figure which shows the structure of the measurement unit as a tool inspection apparatus which concerns on embodiment of this invention. It is a flowchart (the 1) which shows the procedure of the process which concerns on the external shape inspection of the drill which a processing unit performs. It is a flowchart (the 2) which shows the procedure of the process which concerns on the external shape inspection of the drill which a processing unit performs. It is a figure which shows an example of the image obtained by image | photographing a drill. It is a figure which expands and shows the binary image of the front-end | tip part obtained by image | photographing a drill. It is figure (a) (b) which expands and shows the binary image of the front-end | tip part obtained by image | photographing a ball end mill. It is a figure which expands and shows the binary image of the front-end | tip part obtained by image | photographing a flat end mill.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Processing machine 110 Base 120 Work table 130 Drill chuck 140 Drill 141 Chucking part 142 Drill main body 143 End mill main body 200 Work 300 Measuring unit 301 Light source device 302 Lens unit 303 CCD camera (imaging means)
304 connector 305 camera cable 350 processing unit (image processing means)

Claims (4)

An imaging unit that is set in a processing machine and captures a predetermined visual field range including a tip portion of a tool for processing a workpiece and outputs an image signal;
Image processing means for generating and processing binary image data based on an image signal output from the photographing means;
The image processing means includes
Edge point detection means for detecting an image edge point from the binary image data;
Means for removing what is expected as an image edge point other than the image edge point corresponding to the contour of the tool from the plurality of detected image edge points;
Virtual contour determining means for determining a virtual contour representing the contour of the tool based on the image edge points remaining after the removal;
Outline information generating means for generating outline information representing the outline feature of the tool based on a portion in the area expected to be an area in the tool by the virtual contour line in the binary image data. A tool inspection apparatus characterized by that. The work tool is a drill;
The tool inspection apparatus according to claim 1, wherein the contour determining means determines a straight line representing an inclined contour of the tip of the rotating drill as a virtual contour. The work tool is a ball end mill;
The tool inspection apparatus according to claim 1, wherein the contour determining means determines a circular line representing the contour of the tip of the rotating ball end mill as a virtual contour. The tool is a flat end mill;
The tool inspection apparatus according to claim 1, wherein the contour determining means determines a straight line representing the contour of the tip of the rotating flat end mill as a virtual contour.

Images