JP4584566B2 - Imaging device for grinding machine - Google Patents

Description

  The present invention relates to an imaging apparatus capable of projecting a processing state of a workpiece during grinding on a television display using a grinding wheel provided in the grinding apparatus.

  As an imaging device for diagnosing a workpiece processed by a grinding device, an imaging device including a CCD camera and an image processing device is used. The CCD cameras of these imaging devices are located on the machine base far away from the work to be processed, and have the disadvantage that the image magnification is small, and the camera moves relative to the grinding wheel of the grinding device. In addition, a camera tracking device is required (see, for example, Patent Document 1 and Patent Document 2).

In order to eliminate such drawbacks, a column is arranged on the machine base 111 shown in FIG. 5 so as to be movable in the front-rear direction so that the installation position of the CCD camera is brought close to the work and the camera does not move relative to the grinding wheel. 112 has a grinding wheel 116 provided on a grinding wheel head 114 mounted so as to be movable up and down by driving a motor 115, and a work w mounted on a table movable in the left-right direction is provided. Using the grinding device 100 capable of grinding by relative movement of the grinding wheel and the workpiece, a CCD camera 136 for imaging the machining status of the workpiece during grinding is fixedly arranged on the side surface of the grinding wheel head 114, and reciprocated left and right. The video signal of the image pickup device CCD of the CCD camera is converted at the timing of the timing detection means 139 that detects the time when the work on the moving table 118 enters the focal range of the CCD camera 136. Interview - capture the image memory -132 of data 121, it has been proposed to project the image on the display 133. (For example, refer to Patent Document 3).
JP-A-8-192358 JP 2003-251557 A JP 2000-79539 A

  In the imaging apparatus disclosed in Patent Document 3, the CCD camera lens has a large lens diameter and the vicinity of the processing point where the work and the grinding wheel are in contact with each other in order to dislike that the lens of the CCD camera is soiled by adhesion of grinding fluid. In addition, the camera cannot be brought close to the lens, and the magnification of the lens is limited, so that it is desired to improve the sharpness of the video image.

The invention of claim 1 includes a workpiece placed on an X-axis table movable in the left-right direction (X-axis direction), and a grindstone head which is movable in the front-rear direction and can be moved up and down in the vertical direction. A CCD camera is mounted on the side wall of a column of a grinding apparatus for machining the workpiece by relative movement of the grinding wheel held by the wheel so that the workpiece can be moved up and down and moved back and forth. An apparatus for imaging a workpiece capable of imaging a contact processing point,
The imaging apparatus includes a camera control unit CCU, a personal computer having an image processing unit, a television display, a lighting device, the CCD camera including an imaging device CCD, a borescope or a fiberscope, and The borescope or fiberscope is coupled to a CCD camera by the adapter, and includes an illumination device for irradiating laser light along the optical axis of the borescope or fiberscope; The television which transmits the video signal imaged on the image pickup device of the camera to the video signal of the personal computer coupled via the camera control unit CCU and displays the information from the video signal processing unit. John indicator,
The CCD camera was moved back and forth and moved up and down by holding the lower surface of the CCD camera on a slider for back and forth movement having a guide on the lower surface, and horizontally held on a support shaft fixed to the column side wall of the grinding apparatus with bolts. A guide is installed on a pair of rails so that the guide can be moved in the front-rear direction. The front-rear movement slider erects the guide in a direction perpendicular to the front surface, and a lift slider is fixed to the front surface of the guide. An object of the present invention is to provide an image pickup device for a work for a grinding machine, characterized by being carried out by sliding on.

  By connecting a bore scope or a fiber scope to the CCD camera via an adapter, the lens tip of these scopes can be brought closer to the vicinity of the workpiece or the grinding wheel, and the lenses of these scopes Therefore, the image projected on the display becomes clearer. In addition, since the scope is more drip-proof than the CCD camera, it is difficult to get dirty with the grinding liquid, and the grinding liquid can be easily wiped off. In addition, the depth of focus can be increased by attaching the CCD camera in the vicinity of the grinding wheel head so that it can be moved up and down and back and forth, and a clear image can be taken from far to near the work.

(Example)
Hereinafter, the present invention will be described in more detail with reference to the drawings.
1 is a front view of a grinding apparatus provided with an imaging device of the present invention, FIG. 2 is a side view of a grinding apparatus provided with the imaging device of the present invention, FIG. 3 is a cross-sectional view of the imaging device, and FIG. It is the front view which notched some imaging devices which show.

  In the grinding apparatus 1 having the imaging device 30 shown in FIG. 1 and FIG. 2, 2 is a work (subject), 3 is a grinding wheel, 4 is an X-axis telescope capable of reciprocating in the horizontal direction (X-axis direction). -Bull, 5 is a work table, 6 is an electromagnetic chuck, 7 is a saddle that can be moved in the front-rear direction (Y-axis direction) by driving a servo motor 7a, 8 is a control unit of the grinding apparatus, 9 is a column, 10 is A grinding wheel head, 11 is a grinding wheel shaft, 12 is a lifting mechanism that moves the grinding wheel head in a vertical direction (Z-axis direction) by driving a servo motor 13, 14 is a servo motor that drives the grinding wheel to rotate, and 17 A safety protection cover 25 is an X-axis linear scale, 26 is a Y-axis linear scale, 28 is a Z-axis linear scale, and 30 is an imaging device.

  The imaging device 30 includes a camera control unit CCU 29, a personal computer 31 having an image processing unit, a television display 32, a keyboard 33, a mouse 34, an illumination device (light source) 35, and a CCD having an imaging device CCD. The camera 36, a bore scope or fiber scope 50, and an adapter 60, and the scope 50 and the CCD camera 36 are coupled by the adapter 60.

  The lower surface of the CCD camera 36 of the imaging device 30 is held by a slider 39 for moving back and forth having a guide 38 on the lower surface, and is held horizontally by a support shaft 37 fixed to the side wall of the column 9 of the grinding device 1 with bolts. A guide 38 is installed on the pair of rails 38a so as to be movable in the front-rear direction. Further, the slider 39 employs a structure in which a guide 40a is erected in the vertical direction on the front surface, an elevating slider 41 is fixed to the front surface of the guide, and the guide 40a is slid on the rail 40. Therefore, the CCD camera 36 has a structure that can be moved up and down in the vertical direction with respect to the work w and movable in the front-rear direction with respect to the work w, so that the depth of focus can be increased.

  As shown in FIG. 3, the borescope 50 of the imaging device 30 is equipped with an eyepiece 54 in which an objective lens 51 is disposed at the tip of a thin light-shielding pipe 52 and an eyepiece 53 is disposed at the other end. When the lens approaches the object (work or grinding wheel), the light is focused, and the light emitted from the light source 35a of the lighting device 35 is the light guide 35b, the outer tube of the image conduit tube 56, and the light shielding pipe 52. The light reflected from the object lens 51 through the objective lens 51 through the light exit passage 55 formed by the inner cylinder and reflected from the objective lens 51 is incident again from the objective lens 51 side. The light enters the inside of the conduit conduit 56a and sends the optical image formed on the image conduit to the eye piece 54 side through the image incident end portion 56b. The bore scope 50 is, for example, Side Mori Co., Ltd. Box, Co., Ltd. key - available from Enns.

  The adapter 60 is used to couple the bore scope or the fiber scope 50 to the CCD camera 36, and can be obtained from Moritex Corporation, Keyence Corporation, Mitutoyo Corporation. On the front side of the adapter 60, the eyepiece 54 side of the borescope 50 is attached to the base ring 63 with a fixing ring 61 and a lock ring 62. A lock ball 64 that engages with an eyepiece 54 of a borescope inserted into the fixing ring 61 is disposed in a recessed groove 66 formed in a gap between the fixing ring 61 and the locking ring 62 so as to advance and retract. . The lock ring 62 is urged forward by a spring 65 with respect to the base ring 63. When the lock ring 62 is changed by an external force, the lock ball 64 is retracted into the concave groove 66 so that the eye piece 54 side is moved. When the lock ring 62 is urged forward by a load spring 65, the lock ring 62 is pushed inward from a concave groove 66 formed on the inner surface of the lock ring 62, and the eye piece 54 is clamped from the periphery. To engage with each other. The rear surface side of the adapter 50 includes a lens feed 67 that covers the objective lens 36a of the CCD camera.

  The CCD camera 36 passes the light image incident on the objective lens 36a through the collimate lens 36b and then forms an image on the charge coupled device (CCD) 36c. The CCD camera 36 is connected (RAM) to the image recording unit of the computer 31 via the camera control unit (CCU) 29, and the image processing unit processes the video signal transmitted to the image recording unit, An image is displayed on the television display 32. The memory section (ROM) of the computer 31 is equipped with image processing programming software, such as Mitutoyo Corporation's image unit data processing software QSPAK (product name), and can measure outside and inside the screen. Thus, the inspection result can be displayed on the display 32 as an EXCEL table.

  The light source of the light irradiator 35 mounted on the borescope or fiberscope 50 is preferably a halogen lamp. In addition to the reflection type light source, a transmissive light source (for example, halogen light) is radiated from the back side opposite to the work borescope or the hiberscope 50, and the work light The image may be further brightened.

  In the imaging apparatus 30 shown in FIG. 4, a CCD camera 36 is coupled to a coaxial zoom lens body (telephoto camera) 71 via a mounter 70, and a fiber illumination device 35 is connected to an illumination lens barrel 72 of the coaxial zoom lens body. An optical fiber fixture 73 is provided, and an adapter 60 in which a triangular prism 60a is fixed by a fixing tool 60b is coupled to the objective lens 74 side of the coaxial zoom lens body, and a fiber scope is connected to the tip of the adapter 60. 50 are combined. The light emitted from the illuminating device 35 connected to the coaxial zoom lens body is refracted by the triangular prism 60a via a beam splitter, a collimating lens, and an objective lens 74 (not shown) to be refracted by the fiber zoom. Then, the light is reflected by the object and reflected by the beam splitter via the reverse path, and half of the reflected light is blocked by the knife edge to form an image on the CCD.

  This imaged video signal is sent to the image recording unit (ROM) of the computer 31 via the camera control unit (CCU) 29, and the image processing unit processes the video signal transmitted to the image recording unit. The image is displayed on the television display 32. Since the tube 52 of the fiber scope 50 is more flexible than the bore scope, the angle and direction can be easily changed.

  The imaging device 30 of the grinding apparatus of the present invention can position a tip provided with an objective lens of a bore scope or a fiber scope 50 near the grinding point, and the objective lens and eyepiece of these scopes. Since the magnification of the lens is multiplied by the magnification of the CCD camera, a clearer image can be obtained. In addition, since the bore scope or the fiber scope 50 is superior in antifouling property as compared with the CCD camera, dirt due to the grinding liquid can be easily wiped off.

It is a front view of the grinding device provided with the imaging device of the present invention. It is a side view of the grinding device provided with the imaging device of the present invention. It is sectional drawing of an imaging device. It is the front view which notched some imaging devices which show another mode. It is a perspective view of the imaging device of a grinding device. (Known)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grinding device 30 Imaging device 31 Computer 32 Display device 35 Illumination equipment 36 CCD camera 50 Borescope 60 Adapter

Claims (1)

A workpiece mounted on an X-axis table movable in the left-right direction (X-axis direction), and a grinding wheel held on a grinding wheel head that is movable in the front-rear direction and can be moved up and down in the vertical direction A CCD camera attached to the column side wall of a grinding apparatus that cuts the workpiece by relative movement can be moved up and down and moved back and forth, and this CCD camera can image a machining point where the workpiece and the grinding wheel are in contact with each other. An imaging device for a workpiece,
The imaging apparatus includes a camera control unit CCU, a personal computer having an image processing unit, a television display, a lighting device, the CCD camera including an imaging device CCD, a borescope or a fiberscope, and The borescope or fiberscope is coupled to a CCD camera by the adapter, and includes an illumination device for irradiating laser light along the optical axis of the borescope or fiberscope; The television which transmits the video signal imaged on the image pickup device of the camera to the video signal of the personal computer coupled via the camera control unit CCU and displays the information from the video signal processing unit. John indicator,
The CCD camera was moved back and forth and moved up and down by holding the lower surface of the CCD camera on a slider for back and forth movement having a guide on the lower surface, and horizontally held on a support shaft fixed to the column side wall of the grinding apparatus with bolts. A guide is installed on a pair of rails so that the guide can be moved in the front-rear direction. The front-rear movement slider erects the guide in a direction perpendicular to the front surface. An imaging apparatus for a work for a grinding apparatus, characterized by being performed by sliding on the workpiece.

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