Patent Application
20070281588
Subsequently, the invention is described on its mode of embodiment with reference to the accompanying drawings so that it may be understood.
Here,
As shown in
The base 11 includes a base structure 21 made of a highly rigid material such as cast iron and having a flat face 20 on its upper portion, and a plurality of leg members 22 attached to the lower portion of the base structure 21 and having adjustable heights. As a result, the flat face 20 of the base structure 21 can be brought into a horizontal state by adjusting the heights of the individual leg members 22 according to the levels of the place of installation.
The work table 13 includes: a work fixing bed 23 such as a magnet chuck for gripping the work 12 directly; a first work bed 24 for supporting the work fixing bed 23; a second work bed 25 for supporting the first work bed 24 in a manner to rotate at a fine angle in a horizontal plane (i.e., in a plane parallel to the flat face 20 of the base structure 21; and a third work bed 26 for supporting the second work bed 25. With this constitution, the work fixing bed 23 can be rotated at the fine angle through the first work bed 24 so that the position of the work 12 attached to the work fixing bed 23 can be finely adjusted.
The work unit 14 is provided with a third moving device 31 including: a mounting bed 27 for fixing the base side of the third work bed 26 of the work table 13; a Z-direction carriage 29 adapted to move back and forth on a pair of Z-direction rails 28 attached to the back side of the mounting bed 27 and arranged in parallel with a Z-direction normal to the horizontal face; and a Z-axis column 30 for supporting the Z-direction rails 28. The work unit 14 is further provided with: a first moving device 36 including a column bed 32 for mounting the Z-axis column 30, an X-direction carriage 34 adapted to move back and forth on a pair of X-direction rails 33 attached to the back side (or the lower face side) of the column bed 32 and arranged in parallel with the X-direction of the horizontal face, and an X-axis column 35 for supporting the X-direction rails 33; and a second moving device (39) including a Y-direction including a Y-direction carriage 38 adapted to move back and forth on a pair of Y-direction rails 37 attached to the back side (or the lower face side) of the X-axis column 35 and arranged on one side on the flat face 20 of the base structure 21, e.g., in parallel with the Y-direction perpendicular to the X-direction.
With this constitution, the work 12 can be moved back and forth in the Z-direction through the work table 13 by moving the mounting bed 27 back and forth in the Z-direction. Moreover, the X-direction carriage 34 can be moved back and forth in the Y-direction by moving the Y-direction carriage 3 back and forth in the Y-direction, and the mounting bed 27 can be moved back and forth in the X-direction by moving the X-direction carriage 34 back and forth in the X-direction. As a result, the work 12 can be moved in the X-direction and in the Y-direction in synchronism with the movement of the work 12 gripped on the work table 13, by moving the Y-direction carriage 38 and the X-direction carriage 34, respectively, in the Y-direction and in the X-direction while moving the mounting bed 27 back and forth in the Z-direction.
As shown in
The stone unit 17 is provided with: a fourth moving device 47 including a mounting bed 44 for mounting the electric motor 42 of the stone rotating mechanism 16, and a U-direction carriage 46 adapted to move back and forth on a pair of U-direction rails 45 attached to the back side of the mounting bed 44 and arranged in parallel with the U-direction (parallel to the X-direction in
With this constitution, when the rotating table 53 is rotated, the stone rotating mechanism 16 turns on the rotation axis P of the rotating table 53 so that the grinding stone 15 also turns on the rotation axis P of the rotating table 53. By moving the mounting bed 44 and the U-direction rail supporting bed 48 respectively in the U-direction and in the V-direction, moreover, the stone rotating mechanism 16 attached to the mounting bed 44 can be moved to an arbitrary position in a horizontal plane over the rotating table 53. By adjusting the individual moving strokes of the mounting bed 44 and the U-direction rail supporting bed 48, moreover, the center position of the leading end portion of the grinding stone 15 can be substantially aligned with the rotation axis P of the rotating table 53. As a result, even when the rotating table 53 is rotated, the center of the leading end portion of the grinding stone 15 can be only rotated but not turned on the rotation axis P of the rotating table 53.
The image pickup mechanism 19 includes: a camera post 56 erected on the other side above the rotating table platform 55 in parallel with the same direction as the Z-direction and arranged to have its leading portion at a position above the stone rotating mechanism 16; a camera supporting member 58 attached to the leading portion of the camera post 56 in the same direction as the Y-direction (or the V-direction); and the camera (e.g., a video camera having an image pickup element of a CCD and having a zooming function) 18 fixed on a camera mounting portion 57. The image pickup mechanism 19 further includes a camera illuminator 59 (e.g., an illuminating having a light source of a highly luminous light emitting diode) mounted on the V-direction rail supporting bed 51, for example, at the imaging time). The image pickup mechanism 19 further includes a (not-shown) display for displaying the image taken by the camera 18, thereby to perform the work position confirmation before the grounding operation, the work shape confirmation after the grinding operation, the confirmation of the leading end shape of the grinding stone, the confirmation of the grinding stone position, and the confirmation of the position of the grinding origin.
Here, the profile grinding machine 10 has a manual control function to move the mounting bed 27, the U-direction carriage 38 and the X-direction carriage 34 manually back and forth respectively in the Z-direction, in the Y-direction and in the X-direction thereby to rotate the rotating table 53 manually on the rotation axis P, and is provided with a not-shown numerical control device for moving the mounting bed 27, the Y-direction carriage 38 and the X-direction carriage 34 automatically back and forth by predetermined distances respectively in the Z-direction, in the Y-direction and in the X-direction, and for rotating the rotating table 53 automatically by a preset angle on the rotation axis P thereof. As a result, when a grinding program is created on the basis of a preset drawing and inputted to the numerical control device, the operation to grind the work 12 gripped by the work table 13 can be automatically performed.
Here is described a grinding method of the case, in which ground faces inclined at a constant angle with respect to a vertical direction are formed all at once by a single grinding operation, in the individual inner faces of a recess 61 made open in the side face of the work 12, as shown in different perspective directions in
First of all, the grinding program for the numerical control device of the profile grinding machine 10 is created on the basis of design drawings. Here, the work 12 has a mounting reference plane formed in advance to provide a reference at the time when it is mounted on the work fixing bed 23. By fitting the mounting reference plane to the stationary reference plane of the work fixing bed 23, the mounting direction and the mounting position of the work attached to the work fixing bed 23 can be determined with respect to the origin of the profile grinding machine 10.
Next, the mounting bed 44 and the U-direction rail supporting bed 48 are moved back and forth respectively in the U-direction and the V-direction thereby to align the center position of the leading end portion of the grinding stone 15 of the stone rotating mechanism 16 attached to the mounting bed 44, with the rotation axis P of the rotating table 53. At this time, the rotating table 53 is rotated, as shown in
When the operation to align the center position of the leading end portion of the grinding stone 15 and the position of the rotation axis P of the rotating table 53 is ended, the mounting bed 27, the Y-direction carriage 38 and the X-direction carriage are moved by the manual operations, respectively in the Z-direction, in the Y-direction and in the X-direction, the work fixing bed 23 is rotated by a fine angle through the first work bed 24 thereby to adjust the position of the work 12 attached to the work fixing bed 23, finely so that the grinding starting point of the work 12 is adjusted to the grinding original position set on the grinding program. By taking the images of the grinding starting point of the work 12 and the leading end portion of the grinding stone simultaneously with the camera and displaying them in the display, it can be confirmed from the qualitative positional relation between the grinding starting point of the work 12 and the leading end portion of the grinding stone whether or not the grinding starting point of the work 12 is aligned with the grinding original position set on the grinding program.
When the alignment of the grinding original position is ended, the grinding starting switch of the numerical control device is turned ON. Then, the depth of cut of the grinding stone 15 is started from the upper face side of the work 15, for example, so that the grinding operation to extract the grinding stone 15 from the back side (or the lower face side) of the work 12 is started from one side to the other side of the recess 61. Here, the ground situation and the confirmation of the shape of the work 12 can be performed on the spot by taking the state of the work 12 being or after ground and by displaying it in the display.
Here, by moving the Y-direction carriage 38 and the X-direction carriage 34 back and forth, respectively, in the Y-direction and in the X-direction while moving the mounting bed 27 back and forth, the work 12 can be moved in the X-direction and in the Y-direction in synchronism with the Z-direction movement of the work 12 gripped on the work table 13. Therefore, the grinding quantities of the lower face sides (or the sides, which the grinding stone leaves) of corner areas M and N of the recess 61, in which two adjoining faces intersect, can be adjusted to the designed quantity, thereby to form such ground faces on the individual inner faces of the recess 61 as are homogeneously inclined with respect to the vertical direction.
As the grinding stone 15 moves from one side to the other side of the recess 61, as shown in
Although the invention has been described in connection with its embodiment, it should not be limited in the least to the constitution described in the foregoing mode of embodiment but contains not only other modes of embodiment, as conceived within the range of the disclosure of claims, but also its modifications.
For example, the second moving device for moving the work table in the Y-direction is disposed above the base, and the first moving device for moving the work table in the X-direction is disposed on the second moving device. It is, however, arbitrary to interchange the first moving device and the second moving device. The fifth moving device for moving the stone rotating mechanism in the V-direction is disposed on the rotating table, and the fourth moving device for moving the stone rotating mechanism in the U-direction is disposed on the fifth moving device. It is, however, arbitrary to interchange the first moving device and the second moving device. It is, however, arbitrary to interchange the fifth moving device and the fourth moving device. Moreover, the U-direction and the V-direction are aligned with the X-direction and the Y-direction, respectively, but this alignment may not be made. Moreover, the U-direction and the V-direction, and the X-direction and the Y-direction are made perpendicular, respectively, in the horizontal plane, but may intersect at an arbitrary angle other than 90 degrees.
On the other hand, the recess of the work is ground from its one side to the other by the single operation. In case the recess has a complicated shape, for example, the grinding operation may also be performed by dividing the recess into a plurality of grinding areas to confirm the shape of the ground faces of the individual grinding areas.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2006-156288 | Jun 2006 | JP | national |
