JP6970565B2 - Tool cutting device - Google Patents

Description

The present invention relates to a tool cutting device for cutting a plate-shaped workpiece.

In the tool cutting device (see, for example, Patent Document 1), while moving the holding table that sucks and holds the plate-shaped work in the horizontal direction, one bite having a diamond tip as a cutting edge is rotated around the holding table. By cutting the cutting edge into the upper surface of the plate-shaped work held by the plate, the entire upper surface of the plate-shaped work can be cut. Then, a large number of arc cutting marks are formed on the upper surface of the plate-shaped work by tool cutting.

When the area of the plate-shaped work to be cut becomes large, it is necessary to increase the diameter of one bite to rotate in accordance with the area of the plate-shaped work in order to appropriately cut the entire upper surface of the plate-shaped work. In addition, it is necessary to increase the orbital speed of the bite or slow down the moving speed of the holding table.

In addition, when cutting is performed by rotating one cutting tool, the diamond tip, which is the cutting edge, wears, and a difference in height occurs on the upper surface of the plate-shaped work after cutting between the start and end of cutting. It ends up. Therefore, in order to cut the entire upper surface of the plate-shaped work in a short time by aligning the height even if the area of the plate-shaped work becomes large, cutting of a cutting tool equipped with two cutting tools on the flange mounted on the lower end side of the rotating shaft. An apparatus (see, for example, Patent Document 2) was considered.

Japanese Unexamined Patent Publication No. 2010-036321 Japanese Unexamined Patent Publication No. 2017-024128

However, in a tool cutting device as described in Patent Document 2, since two tools are mounted on one flange mounted on one rotating shaft, a diamond chip which is a cutting edge of each bit However, there is a problem that it is difficult for the operator to adjust the heights of the two cutting tools so that the lowermost ends of the cutting blades have the same height when the pieces are worn by different amounts.

Therefore, in the tool cutting device, there is a problem that a plate-shaped work having a large area can be cut in a shorter time with at least two or more tools. Further, there is a problem that a difference in height is caused on the upper surface of the plate-shaped work after cutting due to a difference in wear of each cutting edge of a plurality of cutting tools.

In the present invention for solving the above problems, a holding table having a holding surface for holding a plate-shaped workpiece and a rotating shaft extending in a direction perpendicular to the holding surface are rotated to rotate a bite to rotate the holding table. the holding but a cutting means for cutting the top surface of the plate-shaped workpiece holding and cutting feed means for the said holding table and said cutting means to relatively cutting feed in a direction parallel to the holding surface, the said cutting means A tool cutting device provided with height adjusting means for approaching or separating from a surface in a direction perpendicular to the surface, wherein the cutting means is at least two first cuttings arranged in parallel in a direction orthogonal to the cutting feed direction. and means and second cutting means, the cutting means and the second cutting means of the first, respectively, and connected to the tip of the rotating shaft extending in a direction orthogonal to said rotation axis, said The bite is held at a position distant from the axis of rotation in the orthogonal direction, the bite is rotated around the axis of rotation, and the bite orbiting around the axis of rotation is orthogonal to the other axis of rotation. A plate-shaped flange having a length that does not reach in the direction and a spindle unit having a motor for rotating the rotating shaft and rotatably supporting the rotating shaft are provided, and the rotating shaft of the first cutting means and the rotating shaft thereof. The rotation axis of the second cutting means is located on the same straight line in a direction orthogonal to the cutting feed direction, and the rotation direction of the rotation axis of the first cutting means and the second cutting means. and a direction against the rotation direction of the rotation axis, of the byte orbiting the center of the locus of said bytes orbiting around the said rotation axis of said first cutting means, the axis of rotation of the second cutting means the locus, the by becoming heavy a byte cutting device for cutting a plate-shaped workpiece.

Further, in the present invention for solving the above-mentioned problems, a holding table having a holding surface for holding a plate-shaped work and a rotating shaft extending in a direction perpendicular to the holding surface are rotated to rotate a cutting tool. a cutting means for holding a table to cut the upper surface of the plate-shaped workpiece holding and cutting feed means for the said holding table and said cutting means to relatively cutting feed in a direction parallel to the holding surface, the said cutting means A cutting device provided with a height adjusting means for vertically approaching or separating from the holding surface, wherein the cutting means is at least two first units arranged in parallel in a direction orthogonal to the cutting feed direction. comprising a cutting means and a second cutting means, the cutting means and the second cutting means of the first, respectively, and connected to the tip of the rotating shaft extending in a direction orthogonal to said rotation axis The cutting tool is held at a position distant from the rotation axis in the orthogonal direction, the cutting tool is rotated around the rotation axis, and the cutting tool orbiting around one of the rotation axes becomes the other rotation axis. It is provided with a plate-shaped flange having a length that does not reach in the orthogonal direction and a spindle unit that rotates the rotating shaft to rotate the cutting tool, and either the first cutting means or the second cutting means. It is provided with a driving motor for rotating the rotating shaft of the cutting means, and a driven rotating means for driving the rotating shaft of the other cutting means by rotating the rotating shaft of the one cutting means rotated by the driving motor. The rotation axis of the first cutting means and the rotation axis of the second cutting means are located on the same straight line in a direction orthogonal to the cutting feed direction, and the rotation axis of the first cutting means. direction of rotation and a direction against the rotation direction of the rotation axis of said second cutting means, said the locus of said bytes orbiting around the said axis of rotation of the first cutting means, said second cutting means the locus of the byte orbiting the center of the rotary shaft, which is a byte cutting device for cutting a plate-shaped workpiece by becoming heavy.

The cutting tool of the first cutting means includes a first upper surface height measuring means for measuring the height of the upper surface of a plate-shaped work in which a cutting mark is formed by the cutting tool of the first cutting means, and the second cutting means. The second upper surface height measuring means for measuring the height of the upper surface of the plate-shaped work in which the cutting marks are formed by the cutting tool, and the first upper surface height and the first surface height measured by the first upper surface height measuring means. When there is a difference between the height of the second upper surface measured by the upper surface height measuring means of 2 and the height of the second upper surface, the height of the holding surface of the holding table is calculated from the height of the first upper surface and the height of the second upper surface. A cutting means obtained by cutting the upper surface farther from the holding surface is applied to the holding surface by a distance corresponding to the difference so that the height of the upper surface on the far side matches the height of the upper surface closer to the holding surface. It is preferable that the correction unit is provided so as to be close to each other.

The cutting tool according to the present invention includes at least two first cutting means and a second cutting means arranged in parallel in a direction orthogonal to the cutting feed direction, and includes a first cutting means and a second cutting means. are each, extending in the direction perpendicular to the rotation axis coupled to the distal end of the rotating shaft, holding the byte at a position away orthogonally from the rotational axis, it is around the byte around the rotation axis, of one It is equipped with a plate-shaped flange whose length is such that the cutting tool that orbits around the rotation axis does not reach the other rotation axis in the direction orthogonal to the other rotation axis, and a spindle unit that has a motor that rotates the rotation axis and rotatably supports the rotation axis. , Since the rotation axis of the first cutting means and the rotation axis of the second cutting means are located on the same straight line in the direction orthogonal to the cutting feed direction, the rotation direction of the rotation axis of the first cutting means. When by the direction against the rotation direction of the rotation axis of the second cutting means, without impinging the flange of the flange and the second cutting means in the first cutting means, first the locus of bytes orbiting about the axis of rotation of the cutting means, the locus of bytes orbiting about the axis of rotation of the second cutting means, can be a intended to make cutting by becoming heavy, it size of the area It is possible to cut the entire upper surface of the plate-shaped work in a shorter time than before.

The cutting tool according to the present invention includes at least two first cutting means and a second cutting means arranged in parallel in a direction orthogonal to the cutting feed direction, and includes a first cutting means and a second cutting means. They are each, extending in the direction perpendicular to the rotation axis coupled to the distal end of the rotating shaft, holding the byte at a position away orthogonally from the rotational axis, is orbiting the bytes around the said rotation axis, It is provided with a plate-shaped flange having a length such that the cutting tool orbiting around the one rotating shaft does not reach the other rotating shaft in the orthogonal direction, and a spindle unit for rotating the rotating shaft to rotate the cutting tool. The main motor that rotates the rotation axis of either the first cutting means or the second cutting means, and the rotation of the rotation axis of one cutting means that the main motor rotates causes the rotation of the other cutting means. A driven rotating means for rotating the shaft in a driven manner is provided , and the rotation axis of the first cutting means and the rotation axis of the second cutting means are located on the same straight line in a direction orthogonal to the cutting feed direction . by the direction against the rotation direction of the rotation axis of the rotating direction and the second cutting means of the rotation axis of the first cutting means, and flange of the flange and the second cutting means in the first cutting means without impinging, also, the locus of bytes orbiting about an axis of rotation of the first cutting means, and locus of bytes orbiting about the axis of rotation of the second cutting means, the so become heavy cutting It is possible to cut the entire upper surface of a plate-shaped work having a large area in a shorter time than before.

The cutting tool according to the present invention includes the first upper surface height measuring means for measuring the height of the upper surface of the plate-shaped work in which the cutting marks are formed by the cutting tool of the first cutting means, and the second cutting means. The second upper surface height measuring means for measuring the height of the upper surface of the plate-shaped work in which the cutting marks are formed by the cutting tool, and the first upper surface height and the second upper surface measured by the first upper surface height measuring means. When there is a difference between the height of the second upper surface measured by the height measuring means, the height of the upper surface of the first upper surface height and the second upper surface height, which is farther from the height of the holding surface of the holding table. It is provided with a correction unit that brings the cutting means for cutting the upper surface farther from the holding surface closer to the holding surface by a distance corresponding to the difference so that the height matches the height of the upper surface closer to the holding surface. Therefore, it is possible to prevent a difference in height from occurring on the upper surface of the plate-shaped work after cutting due to the difference in wear of each bite.

It is a perspective view which shows an example of a tool cutting apparatus. It is a schematic plan view explaining the 1st long flange rotating in a clockwise direction and the 2nd long flange rotating in a counterclockwise direction. FIG. 3 is a schematic plan view illustrating a substantially elliptical first elongated flange rotating clockwise and a substantially elliptical second elongated flange rotating counterclockwise. It is a schematic plan view explaining the eyebrows-shaped first long flange rotating clockwise and the eyebrows-shaped second long flange rotating counterclockwise. The height of the upper surface of the plate-shaped work in which the first cutting mark is formed is measured by the first upper surface height measuring means, and the height of the upper surface of the plate-shaped work in which the second cutting mark is formed is measured. It is a perspective view which shows the state which the 2nd top surface height measuring means is measuring. Explanatory drawing explaining the function of the correction part when the difference between the 1st upper surface height measured by the 1st upper surface height measuring means and the 2nd upper surface height measured by the 2nd upper surface height measuring means occurs. Is. It is a perspective view which shows another example of a tool cutting apparatus. Explain a state in which the rotation axis of the first cutting means is rotated by a main motor and the rotation axis of the second cutting means is rotated in a direction opposite to the rotation direction of the rotation axis of the first cutting means by the driven rotation means. It is a front view. The height of the upper surface of the plate-shaped work in which the first cutting mark is formed is measured by the first upper surface height measuring means, and the height of the upper surface of the plate-shaped work in which the second cutting mark is formed is measured. It is a perspective view which shows the state which the 2nd top surface height measuring means is measuring. It is a perspective view which shows an example of the bite cutting apparatus which includes the 1st height adjusting means which moves a 1st cutting means and a 2nd cutting means together. It is a perspective view which shows another example of the tool cutting apparatus which includes the 1st height adjusting means which moves a 1st cutting means and a 2nd cutting means together. 11 is a cross-sectional view showing the structure of a second height adjusting means included in the tool cutting apparatus shown in FIG. 11. It is explanatory drawing explaining the state which the 2nd height adjusting means provided in the tool cutting apparatus shown in FIG. 11 lowers a 2nd cutting means.

(Embodiment 1)
In the tool cutting device 1 shown in FIG. 1, the plate-shaped work W held on the holding table 30 is provided with a first cutting means 6A having a first cutting tool 62 and a second cutting means 6B including a second cutting tool 66. It is a device that cuts by. The front side (-Y direction side) on the base 10 of the tool cutting device 1 is a region where the plate-shaped work W is attached to and detached from the holding table 30, and the rear side (+ Y direction side) on the base 10 is. It is an area where the bite cutting of the plate-shaped work W held on the holding table 30 by the first cutting means 6A and the second cutting means 6B is performed.

For example, the holding table 30 has a rectangular outer shape, has a porous member or the like, and has a holding surface 300 on the upper surface communicating with a suction source (not shown), and the holding surface 300 sucks and holds the plate-shaped work W. The bellows cover 31 is connected to both sides of the holding table 30 in the Y-axis direction, and the holding table 30 has a Y-axis between the attachment / detachment region and the grinding region by the cutting feed means 12 arranged below the bellows cover 31. It is possible to move back and forth in the direction.

The cutting feed means 12 rotates the ball screw 121 having an axial center in the Y-axis direction by the motor 120 so that the holding table 30 is parallel to the holding surface 300 (in the present embodiment, the Y-axis direction). Can be moved.

Above the movement path of the holding table 30, the first upper surface height measuring means 15 for measuring the height of the upper surface Wa of the plate-shaped work W and the second upper surface Wa of the plate-shaped work W are measured. A top surface height measuring means 16 is provided. The first upper surface height measuring means 15 and the second upper surface height measuring means 16 are arranged side by side in the X-axis direction on a support bridge 100 erected on the base 10 so as to straddle the holding table 30. ing.

The first upper surface height measuring means 15 is, for example, a linear gauge that measures the height of the upper surface Wa of the plate-shaped work W held by the holding table 30, and is vertically (Z-axis direction) up and down. It includes a stylus 150 that is movable and comes into contact with the upper surface Wa of the plate-shaped work W, and a casing 151 that supports the stylus 150 in a non-contact manner by the pressure of air supplied from the air source 152. The second upper surface height measuring means 16 is also a linear gauge of a linear motion type, and is supplied from an air source 162 and a stylus 160 that can move up and down in the vertical direction and is in contact with the upper surface Wa of the plate-shaped work W. It is provided with a casing 161 that supports the stylus 160 in a non-contact manner by the pressure of air.
The first top surface height measuring means 15 and the second top surface height measuring means 16 are not limited to the contact type linear gauge, and are, for example, provided with a light emitting portion and a light receiving portion and are non-contact. It may be a reflection type optical sensor capable of measuring the height of the upper surface Wa of the plate-shaped work W. In this case, the measurement light is irradiated from the light projecting portion to the upper surface Wa of the plate-shaped work W, and the height of the upper surface Wa of the plate-shaped work W is measured by the principle of triangulation based on the reflected light received by the light receiving portion. do.

A column 17 and a column 18 are erected side by side in the X-axis direction on the rear side on the base 10, and a first cutting means 6A is held on the side surface of the column 17 on the −Y direction side of the holding table 30. A first height adjusting means 21 that approaches or separates from the holding surface 300 in the vertical direction is arranged, and a second cutting means 6B is held on the side surface of the column 18 on the −Y direction side of the holding table 30. A second height adjusting means 22 is provided so as to approach or separate the holding surface 300 in the vertical direction. Therefore, the first cutting means 6A and the second cutting means 6B are in a parallel state in the X-axis direction.

The tool cutting device 1 is composed of, for example, a storage element such as a CPU and a memory, and includes a control means 9 that controls the entire device. The control means 9 is connected to the cutting feed means 12, the first height adjusting means 21, the second height adjusting means 22, and the like by a wiring (not shown), and cutting under the control of the control means 9. The movement operation of the holding table 30 by the feeding means 12 in the Y-axis direction, the moving operation of the first cutting means 6A by the first height adjusting means 21 in the Z-axis direction, and the second movement by the second height adjusting means 22. The moving operation of the cutting means 6B in the Z-axis direction and the like are controlled.

The first height adjusting means 21 includes a ball screw 210 having a vertical axis, a pair of guide rails 211 arranged in parallel with the ball screw 210, and a motor 212 connected to the ball screw 210 to rotate the ball screw 210. The motor 212 is composed of an elevating block 213 in which the internal nut is screwed into the ball screw 210 and the side portion is in sliding contact with the guide rail 211, and a holder 214 which is connected to the elevating block 213 and holds the first cutting means 6A. When the ball screw 210 is rotated, the elevating block 213 is guided by the guide rail 211 and reciprocates in the Z-axis direction, and the first cutting means 6A supported by the holder 214 also reciprocates in the Z-axis direction. do.

The first cutting means 6A has a first spindle unit 60 having a first motor 602 for rotating the first rotating shaft 600 and rotatably supporting the first rotating shaft 600, and a long-shaped first cutting means 6A. A first long flange 61 connected to the tip (lower end) of the rotating shaft 600 of 1 to hold the first bite 62, and a first long flange 61 fixed to one end of the lower surface of the lower surface in the longitudinal direction. It is equipped with a bite 62.

The first spindle unit 60 includes a first rotating shaft 600 extending in a direction perpendicular to the holding surface 300 of the holding table 30, and a first motor 602 connected to the upper end side of the first rotating shaft 600. And a first housing 601 that rotatably supports the first rotation shaft 600.

The first long flange 61 connected to the tip (lower end) of the first rotating shaft 600 has a long outer shape, that is, in the example shown in FIG. 1, both ends thereof are R-shaped. It has a rectangular shape, but is not limited to this shape. In the present embodiment, the first rotating shaft 600 is connected to the center of the first long flange 61.

A prismatic mounting portion 629 extending in the −Z direction is disposed on the lower surface of one end of the first long flange 61 in the longitudinal direction, and the first bite 62 is a side surface of the mounting portion 629. It is provided with a plate-shaped shank 620 fixed by a fixing bolt or the like, and a cutting edge 621 formed in a sharp shape at the lower end of the plate-shaped shank 620. The cutting edge 621 is made by baking and hardening abrasive grains such as diamond and a predetermined binder.

The second height adjusting means 22 shown in FIG. 1 is connected to a ball screw 220 having a vertical axis, a pair of guide rails 221 arranged in parallel with the ball screw 220, and the ball screw 220 to rotate the ball screw 220. It consists of a moving motor 222, an elevating block 223 whose internal nut is screwed into a ball screw 220 and whose side is in sliding contact with a guide rail 221, and a holder 224 which is connected to the elevating block 213 and holds a second cutting means 6B. Then, when the motor 222 rotates the ball screw 220, the elevating block 223 is guided by the guide rail 221 and reciprocates in the Z-axis direction, and the second cutting means 6B supported by the holder 224 is also Z-axis. Move back and forth in the direction.

The second cutting means 6B has a second spindle unit 64 having a second motor 642 for rotating the second rotating shaft 640 and rotatably supporting the second rotating shaft 640, and a long center. Is fixed to a second long flange 65 that is connected to the tip (lower end) of the second rotary shaft 640 and holds the second bite 66, and to one end of the lower surface of the second long flange 65 in the longitudinal direction. It is equipped with a second bite 66.

The second spindle unit 64 includes a second rotating shaft 640 extending in the direction perpendicular to the holding surface 300 of the holding table 30, and a second motor 642 connected to the upper end side of the second rotating shaft 640. And a second housing 641 that rotatably supports the second rotating shaft 640.

The second long flange 65 connected to the tip (lower end) of the second rotating shaft 640 has a long outer shape, that is, in the example shown in FIG. 1, both ends thereof are R-shaped. It has a rectangular shape, but is not limited to this shape. In the present embodiment, the second rotating shaft 640 is connected to the center of the second long flange 65.

A prismatic mounting portion 669 is disposed on the lower surface of one end of the second long flange 65 in the longitudinal direction, and the second bite 66 is fixed to the side surface of the mounting portion 669 with a fixing bolt or the like. It is provided with a plate-shaped shank 660 and a cutting edge 661 formed in a sharp shape at the lower end of the plate-shaped shank 660. The cutting edge 661 is obtained by baking, for example, abrasive grains such as diamond and a predetermined binder.
The dimensions of each component of the first cutting means 6A and the dimensions of each component of the second cutting means 6B described above are the same.

The operation of the tool cutting device 1 when cutting the plate-shaped work W held by the holding table 30 with a tool will be described below. The plate-shaped work W shown in FIG. 1 is, for example, a large substrate having a rectangular outer shape (for example, a PCB substrate having a square shape of 650 mm), and the upper surface Wa of the plate-shaped work W is a surface to be cut.

First, in the attachment / detachment region, the plate-shaped work W is placed on the holding surface 300 of the holding table 30, and the suction force generated by a suction source (not shown) is transmitted to the holding surface 300, whereby the holding table 30 is set. The plate-shaped work W is sucked and held.
The cutting feed means 12 moves the holding table 30 that sucks and holds the plate-shaped work W to a position slightly above the first cutting means 6A and the second cutting means 6B in the + Y direction, whereby the holding table 30 cuts. It is positioned at the start position of the feed.

The first cutting means 6A is sent in the −Z direction by the first height adjusting means 21, and under the control of the first height adjusting means 21 by the controlling means 9, the lowermost end of the first bite 62. The first cutting means 6A is positioned at a predetermined height position Z1 in which the cutting blade 621 cuts into the upper surface Wa of the plate-shaped work W. Further, the first motor 602 rotates the first rotation shaft 600 in the clockwise direction when viewed from the + Z direction at a predetermined rotation speed, and the first long flange 61 also rotates in the clockwise direction accordingly. do. Then, the first bite 62 orbits around the first rotation axis 600 in the clockwise direction at a predetermined rotation speed.
Further, the second cutting means 6B is sent in the −Z direction by the second height adjusting means 22, and under the control of the second height adjusting means 22 by the controlling means 9, the second bite 66 The second cutting means 6B is positioned at a predetermined height position Z1 in which the cutting edge 661, which is the lowermost end, cuts into the upper surface Wa of the plate-shaped work W. Further, the second motor 642 rotates the second rotation shaft 640 in the counterclockwise direction when viewed from the + Z direction at the same rotation speed as the rotation speed of the first rotation shaft 600, and accordingly, the second rotation shaft 640 is rotated. The long flange 65 also rotates counterclockwise. Then, the second bite 66 orbits around the second rotation shaft 640 in a counterclockwise direction at a predetermined rotation speed.

As shown in FIG. 2, the first long flange 61 and the rotation locus shown by the two-point chain line of the first bite 62 slightly intersect with the rotation locus shown by the one-point chain line of the second bite 66. Although the positions of the second long flange 65 in the X-axis direction are set respectively, the rotation direction of the first rotation shaft 600 of the first cutting means 6A and the second rotation shaft 640 of the second cutting means 6B are set. Since both rotation axes are rotated at the same rotation speed in a direction opposite to the rotation direction of the above, the first long flange 61 and the second long flange 65 do not collide with each other.
In FIG. 2, the first long flange 61 and the second long flange 61 are in a state where the longitudinal direction of the first long flange 61 and the longitudinal direction of the second long flange 65 are 90 degrees. Although they rotate in opposite directions to the flange 65, the first long flange 61 is rotated in the longitudinal direction of the first long flange 61 and the second long flange 65 is rotated in the longitudinal direction of the second long flange 65, for example, at 45 degrees. The flange 61 and the second long flange 65 may rotate in opposite directions while maintaining an angle at which they do not collide due to rotation.

For example, as shown in FIG. 3, the first long flange connected to the tip (lower end) of the first rotary shaft 600 is the first long flange 61A having a substantially elliptical outer shape. The second long flange connected to the tip (lower end) of the second rotary shaft 640 has a substantially elliptical outer shape having the same dimensions as the first long flange 61A. It may be 65A. A first bite 62 is fixed to the lower surface of one end of the first long flange 61A in the long axis direction, and a second bite 62 is fixed to the lower surface of one end of the second long flange 65A in the long axis direction. The bite 66 is fixed. Also in this case, the first long flange 61A and the second long flange 61A and the second are so that the rotation locus indicated by the two-point chain line of the first bite 62 and the rotation locus indicated by the one-point chain line of the second bite 66 slightly intersect. Although the positions of the long flange 65A in the X-axis direction are set respectively, the rotation direction of the first rotation shaft 600 of the first cutting means 6A and the rotation of the second rotation shaft 640 of the second cutting means 6B. By rotating both rotation axes at the same rotation speed in a direction opposite to the direction, the upper surface of the plate-shaped work W does not collide with the first long flange 61A and the second long flange 65A. Wa can be cut.
Further, for example, both the first rotation axis 600 and the second rotation axis 640 are slightly tilted in the −Y direction, and the orbiting first bite 62 is in the rotation locus indicated by the two-dot chain line. The plate-shaped work W is cut while passing through the half circumference on the −Y direction side, and the second bite 66 cuts the plate-shaped work W while passing through the half circumference on the −Y direction side in the rotation locus indicated by the alternate long and short dash line. I will go. The tilt angle of the first rotation shaft 600 and the second rotation shaft 640 in the −Y direction is such that the first rotation shaft 600 and the second rotation shaft 640 have a relative to the holding surface 300 of the holding table 30. It is a slight angle that can be said to be in the vertical direction.

For example, as shown in FIG. 4, the first long flange connected to the tip (lower end) of the first rotation shaft 600 has an eyebrows shape (8) in which both ends are rounded in a circular shape and the central portion is recessed inward. The first long flange 61B having an outer shape (in the shape of a circle), and the second long flange connected to the tip (lower end) of the second rotating shaft 640 is the first long flange 61B. It may be a second long flange 65B having an eyebrows-shaped (8-shaped) outer shape having the same dimensions as the above. A first bite 62 is fixed to the lower surface of one end of the first long flange 61B in the long axis direction, and a second bite 62 is fixed to the lower surface of one end of the second long flange 65B in the long axis direction. The bite 66 is fixed. Also in this case, the first long flange 61B and the second long flange 61B and the second bite 66 are slightly intersected with each other so that the rotation locus indicated by the two-point chain line of the first bite 62 and the rotation locus indicated by the one-point chain line of the second bite 66 slightly intersect. Although the position of the long flange 65B in the X-axis direction is set, the rotation direction of the first rotation shaft 600 of the first cutting means 6A and the rotation direction of the second rotation shaft 640 of the second cutting means 6B. By rotating both rotation axes at the same rotation speed in the opposite direction, the first long flange 61B and the second long flange 65B do not collide with each other, and the upper surface of the plate-shaped work W is formed. You can continue cutting.

As shown in FIGS. 1 and 2, the cutting feed means 12 moves the holding table 30 that sucks and holds the plate-shaped work W in the −Y direction, so that the first bite 62 is formed on the upper surface Wa of the plate-shaped work W. The region Wa1 on the substantially left half (hereinafter referred to as the first upper surface Wa1) is cut, and at the same time, the second bite 66 forms the region Wa2 on the substantially right half of the upper surface Wa of the plate-shaped work W (hereinafter referred to as the second surface Wa1). The upper surface Wa2) is cut. As a result, the first upper surface Wa1 of the plate-shaped work W is flattened while the arc-shaped first cutting mark M1 shown in FIG. 5 is formed. Further, the second upper surface Wa2 of the plate-shaped work W is flattened while the arc-shaped second cutting mark M2 is formed. Then, the first cutting mark M1 and the second cutting mark M2 are slightly overlapped with each other in the central region of the upper surface Wa of the plate-shaped work W, and the first cutting mark M1 and the second cutting mark M2 The overlapping points are formed in a straight line extending in the Y-axis direction, and the entire surface Wa of the upper surface of the plate-shaped work W having a large area is cut in a shorter time than before.

After the holding table 30 moves in the −Y direction to a predetermined position in the Y-axis direction and the entire upper surface Wa of the plate-shaped work W is cut by the first bite 62 and the second bite 66 that circulate, FIG. As shown, the cutting feed means 12 moves the holding table 30 that sucks and holds the plate-shaped work W after cutting in the −Y direction, and the stylus 150 of the first top surface height measuring means 15 is lowered to form a plate. The height of the first upper surface Wa1 is measured in contact with the first upper surface Wa1 of the shaped work W, and the stylus 160 of the second upper surface height measuring means 16 is lowered to lower the plate-shaped work W. It comes into contact with the second upper surface Wa2 and starts measuring the height of the second upper surface Wa2. This is because there is a difference between the amount of wear of the first bite 62 and the amount of wear of the second bite 66, and this difference causes a difference in height on the upper surface Wa of the plate-shaped work W after cutting. It is done to prevent it.

For example, the first upper surface height measuring means 15 and the second upper surface height measuring means 16 are electrically connected to the control means 9 shown in FIGS. 5 and 6, respectively, and the measured first upper surface Wa1 is obtained. And the measured height information of the second upper surface Wa2 is sequentially transmitted to the correction unit 90 provided in the control means 9.

The correction unit 90 is, for example, a difference between the measured values of the first upper surface height measuring means 15 and the second upper surface height measuring means 16 based on the measured values sent every unit time. (See graph G1 in FIG. 6) is sequentially calculated. When the holding table 30 advances in the −Y direction (front side of the paper surface in FIG. 6) to a predetermined position in the Y-axis direction in which the first upper surface height measuring means 15 does not contact the first upper surface Wa1 of the plate-shaped work W. The correction unit 90 calculates the average value of the calculated differences, and uses the average value of the differences as the difference in height between the first upper surface Wa1 of the plate-shaped work W and the second upper surface Wa2 of the plate-shaped work W. Certified as D.
The height of the upper surface of the plate-shaped work W may be measured by the first upper surface height measuring means 15 and the second upper surface height measuring means 16 with the holding table 30 stopped. ..

When the correction unit 90 recognizes that the difference D is not 0, the cutting feed means 12 holds the holding table 30 that sucks and holds the plate-shaped work W from directly below the first cutting means 6A and the second cutting means 6B. After slightly moving to the start position of the cutting feed in the + Y direction, of the height of the upper surface of the first upper surface Wa1 of the plate-shaped work W and the height of the upper surface of the second upper surface Wa2 of the plate-shaped work W, the holding table 30 Controlled by the control means 9 so that the height of the first upper surface Wa1 farther (higher) from the height of the holding surface 300 matches the height of the second upper surface Wa2 closer to the holding surface 300. Under, the first height adjusting means 21 lowers the first cutting means 6A, which has cut the first upper surface Wa1, by a distance corresponding to the difference D in the −Z direction to approach the holding surface 300.

Next, the cutting feed means 12 shown in FIG. 6 moves the holding table 30 that sucks and holds the plate-shaped work W in the −Y direction (front side of the paper surface), so that the first bite 62 is the second of the plate-shaped work W. The upper surface Wa1 of 1 is cut, and as a result, the first upper surface Wa1 of the plate-shaped work W is formed with an arc-shaped first cutting mark M1 and the second upper surface Wa2 of the plate-shaped work W is formed. It is flattened to the same height as the height. That is, it is possible to prevent a difference in height from occurring on the upper surface Wa of the plate-shaped work W after cutting due to a difference between the amount of wear of the first bite 62 and the amount of wear of the second bite 66. ..

(Embodiment 2)
The tool cutting device 1A shown in FIG. 7 is a modification of a part of the components of the tool cutting device 1 shown in FIG. That is, the tool cutting device 1A includes a first cutting means 6C in which a part of the configuration of the first cutting means 6A shown in FIG. 1 is modified, and is a part of the configuration of the second cutting means 6B shown in FIG. The second cutting means 6D is provided, and the main motor 672 that rotates the first rotating shaft 670 of the first cutting means 6C and the first cutting means 6C that the main motor 672 rotates. It is provided with a driven rotating means 69 for drivenly rotating the second rotating shaft 680 of the second cutting means 6D by the rotation of the rotating shaft 670, and other configurations are the same as those of the tool cutting device 1 shown in FIG. ing.

The first cutting means 6C has a first spindle unit 67 having a driving motor 672 for rotating the first rotating shaft 670 and rotatably supporting the first rotating shaft 670, and a long shape, for example, a center. A first long flange 61 connected to the tip of the first rotary shaft 670 to hold the first bite 62, and a first bite fixed to one end of the lower surface of the first long flange 61 in the longitudinal direction. It is equipped with 62.

The first spindle unit 67 includes a first rotating shaft 670 extending in a direction perpendicular to the holding surface 300 of the holding table 30, and a driving motor 672 connected to the upper end side of the first rotating shaft 670. It includes a first housing 671 that rotatably supports the first rotating shaft 670.

The second cutting means 6D includes a second rotating shaft 680 extending in a direction perpendicular to the holding surface 300 of the holding table 30, and a second housing 681 rotatably supporting the second rotating shaft 680. A second spindle unit 68 composed of a second spindle unit 68, a second long flange 65 having a long shape, for example, a center connected to the tip of a second rotating shaft 680 and holding a second bite 66, and a second long length. A second bite 66 fixed to one end of the lower surface of the flange 65 in the longitudinal direction is provided.

The driven rotating means 69 for drivenly rotating the second rotating shaft 680 of the second cutting means 6D shown in FIGS. 7 and 8 has, for example, the configuration described below. A drive pulley 690 is attached to the upper end of the first rotary shaft 670 of the first cutting means 6C, and an endless first drive belt 691 is wound around the drive pulley 690. For example, a first support shaft 692 is erected on the holder 214 shown in FIG. 7, and a second driven pulley 694 and a first driven pulley 693 are arranged vertically on the first support shaft 692. And are arranged. The second driven pulley 694 is fixed to the upper surface of the first driven pulley 693, and the first drive belt 691 is wound around the first driven pulley 693. Further, an endless second drive belt 695 is wound around the second driven pulley 694.

As shown in FIGS. 7 and 8, the second drive belt 695 is also wound around the third driven pulley 696. For example, a second support shaft 697 is erected on the second housing 681 of the second cutting means 6D, and a first spur gear 698 is inserted on the upper end side of the second support shaft 697. The third driven pulley 696 is fixed to the upper surface of the first spur gear 698. Further, the first spur gear 698 meshes with the second spur gear 699 fixed to the upper end side of the second rotating shaft 680 of the second cutting means 6D.

As shown in FIG. 8, the driving motor 672 of the first spindle unit 67 rotates and drives the first rotating shaft 670 in the clockwise direction, for example, when viewed from the + Z direction side, so that the first rotating shaft 670 is rotated. The drive pulley 690 also rotates with the rotation of the first drive belt 691. By rotating the first drive belt 691, the second driven pulley 694 fixed on the first driven pulley 693 and the first driven pulley 693 rotates clockwise when viewed from the + Z direction side. , The second drive belt 695 also rotates. By rotating the second drive belt 695, the third driven pulley 696 rotates in the clockwise direction when viewed from the + Z direction side. When the rotational force of the third driven pulley 696 is transmitted to the first spur gear 698 and the first spur gear 698 rotates clockwise when viewed from the + Z direction side, the first spur gear 698 meshes with the first spur gear 698. The spur gear 699 of 2 rotates in the counterclockwise direction when viewed from the + Z direction side.
The configuration of the driven rotating means 69 is not limited to the example in the present embodiment. For example, the driven pulley is fixed to the upper end side of the second rotating shaft 680 and arranged at the upper end of the first rotating shaft 670. The endless belt may be wound around the provided drive pulley 690 and the driven pulley in a crossed state.

The operation of the cutting tool 1A when cutting the plate-shaped work W held on the holding table 30 shown in FIG. 7 with a tool will be described below.
First, the plate-shaped work W is sucked and held by the holding table 30 in the attachment / detachment region. The cutting feed means 12 moves the holding table 30 that sucks and holds the plate-shaped work W to a position slightly above the first cutting means 6C and the second cutting means 6D in the + Y direction, whereby the holding table 30 cuts. It is positioned at the start position of the feed.

The first cutting means 6C is sent in the −Z direction by the first height adjusting means 21, and under the control of the first height adjusting means 21 by the controlling means 9, the cutting edge 621 has a plate-shaped work W. The first cutting means 6C is positioned at a predetermined height position to be cut into the upper surface Wa of the above surface. Further, the driving motor 672 rotates the first rotation shaft 670 in the clockwise direction when viewed from the + Z direction at a predetermined rotation speed, and the first long flange 61 also rotates in the clockwise direction accordingly.
Further, the second cutting means 6D is sent in the −Z direction by the second height adjusting means 22, and the cutting edge 661 is plate-shaped under the control of the second height adjusting means 22 by the control means 9. The second cutting means 6D is positioned at a predetermined height position to be cut into the upper surface Wa of the work W. Further, the driven rotation means 69 rotates the second rotation shaft 680 in the counterclockwise direction when viewed from the + Z direction at the same rotation speed as the rotation speed of the first rotation shaft 670, and accordingly, the second rotation shaft 680 is rotated. The long flange 65 also rotates counterclockwise.

As shown in FIG. 7, the cutting feed means 12 moves the holding table 30 that sucks and holds the plate-shaped work W in the −Y direction, so that the first bite 62 is the first upper surface Wa1 of the plate-shaped work W. At the same time, the second bite 66 cuts the second upper surface Wa2 of the plate-shaped work W. As a result, the first upper surface Wa1 of the plate-shaped work W is flattened while the arc-shaped first cutting mark M1 shown in FIG. 9 is formed. Further, the second upper surface Wa2 of the plate-shaped work W is flattened while the arc-shaped second cutting mark M2 is formed. Then, the first cutting mark M1 and the second cutting mark M2 are slightly overlapped in the central region of the upper surface Wa of the plate-shaped work W, and the entire upper surface Wa of the plate-shaped work W having a large area is more than the conventional one. Will be cut in a short time.

The holding table 30 is moved in the −Y direction to a predetermined position in the Y-axis direction, and the entire upper surface Wa of the plate-shaped work W is cut by the first bite 62 and the second bite 66 that circulate, and then shown in FIG. As described above, the cutting feed means 12 moves the holding table 30 that sucks and holds the plate-shaped work W after cutting in the −Y direction, and the first upper surface height measuring means 15 is the first upper surface of the plate-shaped work W. The height of Wa1 is measured, the second upper surface height measuring means 16 measures the height of the second upper surface Wa2 of the plate-shaped work W, and each measurement information is sent to the correction unit 90 of the control means 9. Will be done.

Then, similarly to the bite cutting device 1 of the first embodiment, the correction unit 90 recognizes the difference between the first upper surface Wa1 and the second upper surface Wa2 of the plate-shaped work W. If the difference is not 0, the cutting feed means 12 starts cutting feed in the + Y direction slightly below the first cutting means 6C and the second cutting means 6D on the holding table 30 that sucks and holds the plate-shaped work W. After moving to the position, the cutting means for cutting the upper surface farther from the holding surface 300 is brought closer to the holding surface 300 by the distance corresponding to the difference, and then the holding table 30 is sent in the −Y direction. , The plate-shaped work W is subjected to bite cutting so that the height of the first upper surface Wa1 and the height of the second upper surface Wa2 are the same.

The tool cutting device according to the present invention is not limited to the above embodiments 1 and 2, and the configuration of the tool cutting device shown in the attached drawings is not limited to this, and the present invention is not limited to this. It can be changed as appropriate within the range where the effect of can be exhibited.
For example, the cutting tool 1 of the first embodiment includes a first cutting means 6A and a second cutting means 6B, but further uses a third cutting means as a first cutting means 6A and a second cutting means. It may be provided in parallel with 6B. Further, one bite is provided at one end of the lower surface of the first long flange 61 of the first cutting means 6A in the longitudinal direction and one end of the lower surface of the second long flange 65 of the second cutting means 6B in the longitudinal direction. For example, two bites are arranged at both ends of the lower surface of the first long flange 61 in the longitudinal direction, one by one, in the longitudinal direction of the lower surface of the second long flange 65. A total of two bytes may be arranged, one on each end.

The tool cutting device 1B shown in FIG. 10 is a modification of a part of the components of the tool cutting device 1 of the first embodiment shown in FIG. That is, the tool cutting device 1B replaces the first height adjusting means 21 and the second height adjusting means 22 shown in FIG. 1 with the first height adjusting means 23 and the second height adjusting means 24. The other configurations are the same as those of the tool cutting device 1 shown in FIG.

The first height adjusting means 23 approaches or separates the first cutting means 6A and the second cutting means 6B in the direction perpendicular to the holding surface 300 of the holding table 30. The first height adjusting means 23 includes a ball screw 230 having a vertical axis, a pair of guide rails 231 arranged in parallel with the ball screw 230, and a motor 232 connected to the ball screw 230 to rotate the ball screw 230. It is composed of an elevating block 233 in which an internal nut is screwed into the ball screw 230 and a side portion is in sliding contact with the guide rail 231 and a holder 234 connected to the elevating block 233 to hold the first cutting means 6A. When the motor 232 rotates the ball screw 230, the elevating block 233 is guided by the guide rail 231 and reciprocates in the Z-axis direction, and the first cutting means 6A and the second height supported by the holder 234 are used. The second height adjusting means 6B arranged on the elevating block 233 via the adjusting means 24 reciprocates together in the Z-axis direction.

The region on the + X direction side of the elevating block 233 is one step lower than the region on the −X direction side, and the second cutting means 6B is placed in the region on the + X direction side with respect to the holding surface 300 of the holding table 30. A second height adjusting means 24 is provided for vertically approaching or separating. The second height adjusting means 24 includes a ball screw 240 having a vertical axis, a pair of guide rails 241 arranged in parallel with the ball screw 240, and a motor 242 connected to the ball screw 240 to rotate the ball screw 240. It is composed of an elevating plate 243 in which an internal nut is screwed into a ball screw 240 and a side portion is in sliding contact with a guide rail 241 and a holder 244 connected to the elevating plate 243 to hold a second cutting means 6B. When the motor 242 rotates the ball screw 240, the elevating plate 243 is guided by the guide rail 241 and reciprocates in the Z-axis direction, and the second cutting means 6B supported by the holder 244 moves in the Z-axis direction. Move back and forth.

In the tool cutting device 1B, the control means 9 moves the first cutting means 6A and the second cutting means 6B in the Z-axis direction by the first height adjusting means 23, and the second height adjusting means 24. The movement operation of the second cutting means 6B in the Z-axis direction is controlled.

In the tool cutting device 1B, when the plate-shaped work W held on the holding table 30 is started to be cut, the first height adjusting means 23 uses the first cutting means 6A and the second cutting means 6B. By lowering them together, the cutting edge 621 of the first cutting tool 62 and the cutting edge 661 of the second cutting tool 66 can be positioned at the same height position for cutting into the upper surface Wa of the plate-shaped work W.

In FIG. 10, the first bite 62 and the second bite 66 positioned at the same height position by the first height adjusting means 23 are the first upper surface Wa1 and the plate-shaped work of the plate-shaped work W. The state after cutting the second upper surface Wa2 of W is shown. Then, the cutting feed means 12 moves the holding table 30 that sucks and holds the plate-shaped work W after cutting in the −Y direction, and the first upper surface height measuring means 15 is the first upper surface Wa1 of the plate-shaped work W. The height of the second upper surface Wa 2 is measured by the second upper surface height measuring means 16 of the plate-shaped work W, and each measurement information is sent to the correction unit 90 of the control means 9. To go.

Then, similarly to the bite cutting device 1 of the first embodiment, the correction unit 90 recognizes the difference between the first upper surface Wa1 and the second upper surface Wa2 of the plate-shaped work W. For example, it is assumed that the difference recognized by the correction unit 90 is not 0, and the second upper surface Wa2 is higher than the first upper surface Wa1 of the plate-shaped work W. In this case, the cutting feed means 12 moves the holding table 30 that sucks and holds the plate-shaped work W to the start position of the cutting feed in the + Y direction slightly below the first cutting means 6A and the second cutting means 6B. The second cutting means 6B, which cuts the second upper surface Wa 2 farther from the holding surface 300 of the holding table 30, is the second height adjusting means 24 under the control of the control means 9. It is brought closer to the holding surface 300 by a distance corresponding to the difference. After that, the holding table 30 is sent in the −Y direction, the second bite 66 cuts the second upper surface Wa2 of the plate-shaped work W, and the height of the second upper surface Wa2 is the first upper surface Wa1. It will be the same height as the height of. That is, it is possible to prevent a difference in height from occurring on the upper surface Wa of the plate-shaped work W after cutting due to a difference between the amount of wear of the first bite 62 and the amount of wear of the second bite 66. ..
Further, if the height of the first upper surface Wa1 of the plate-shaped work W measured by the first upper surface height measuring means 15 is not a preset value, the first height is adjusted by the difference from the preset value. The first bite 62 and the second bite 66 whose height difference is made zero by the second height adjusting means 24 by moving the elevating block 233 in the Z-axis direction by the means 23 are adjusted to a predetermined height. After that, the upper surface Wa of the plate-shaped work W after cutting is subjected to re-cutting to eliminate the difference in height.

The tool cutting device 1C shown in FIG. 11 is a modification of a part of the components of the tool cutting device 1 of the first embodiment shown in FIG. That is, the tool cutting device 1C replaces the first height adjusting means 21 and the second height adjusting means 22 shown in FIG. 1 with the first height adjusting means 25 and the second height adjusting means 26. The other configurations are the same as those of the tool cutting device 1 shown in FIG.

The first height adjusting means 25 approaches or separates the first cutting means 6A and the second cutting means 6B in the direction perpendicular to the holding surface 300 of the holding table 30. The first height adjusting means 25 includes a ball screw 250 having a vertical axis, a pair of guide rails 251 arranged in parallel with the ball screw 250, and a motor 252 connected to the ball screw 250 to rotate the ball screw 250. The elevating block 253 in which the internal nut is screwed into the ball screw 250 and the side portion is in sliding contact with the guide rail 251, the holder 254 connected to the elevating block 253 and holding the first cutting means 6A, and the elevating block 253. It is composed of a holder 255 for holding the second cutting means 6B. When the motor 252 rotates the ball screw 250, the elevating block 253 is guided by the guide rail 251 and reciprocates in the Z-axis direction, and is supported by the first cutting means 6A and the holder 255 supported by the holder 254. The second height adjusting means 6B is reciprocated together in the Z-axis direction.

For example, three second height adjusting means 26 are arranged on the holder 255 at equal intervals in the circumferential direction, and the second cutting means 6B is arranged in the direction perpendicular to the holding surface 300 of the holding table 30. Approach or separate from. The number of the second height adjusting means 26 arranged is not limited to three, and may be four or more.

The second height adjusting means 26 shown in FIG. 12 includes a shaft 260 whose axial direction is vertical (Z-axis direction) and penetrates the bottom 255b of the holder 255, and a motor 262 connected to the lower end side of the shaft 260. The shaft 260 is provided with a spring 261 inserted on the inner peripheral side, and a bracket 263 disposed on the bottom 255b of the holder 255 to support the motor 262 and the shaft 260.

A male screw 260a is formed on the upper side of the shaft 260, and the male screw 260a is screwed into a female screw 641c formed in the outer peripheral region of the bottom surface 641b of the second housing 641. The spring 261 inserted through the shaft 260 is a coil spring that repels the natural length and tries to spread, and is sandwiched between the holding surface 255a of the holder 255 and the outer peripheral region of the bottom surface 641b of the second housing 641. The lower end side thereof is fixed to the holding surface 255a of the holder 255, and the upper end side thereof is fixed to the bottom surface 641b of the second housing 641.

As shown in FIG. 11, in the tool cutting device 1C, the control means 9 moves the first cutting means 6A and the second cutting means 6B by the first height adjusting means 25 in the Z-axis direction, and the second cutting means. The movement operation of the second cutting means 6B in the Z-axis direction by the height adjusting means 26 of 2 is controlled.

In the tool cutting device 1C, when the plate-shaped work W held on the holding table 30 is started to be cut, the first height adjusting means 25 sets the first cutting means 6A and the second cutting means 6B. By lowering them together, the cutting edge 621 of the first cutting tool 62 and the cutting edge 661 of the second cutting tool 66 can be positioned at the same height position for cutting into the upper surface Wa of the plate-shaped work W.

In FIG. 11, the first bite 62 and the second bite 66 positioned at the same height position by the first height adjusting means 25 are the first upper surface Wa1 and the plate-shaped work of the plate-shaped work W. The state after cutting the second upper surface Wa2 of W is shown. Then, the cutting feed means 12 moves the holding table 30 that sucks and holds the plate-shaped work W after cutting in the −Y direction, and the first upper surface height measuring means 15 is the first upper surface Wa1 of the plate-shaped work W. The height of the second upper surface Wa 2 is measured by the second upper surface height measuring means 16 of the plate-shaped work W, and each measurement information is sent to the correction unit 90 of the control means 9. To go.

Then, similarly to the bite cutting device 1 of the first embodiment, the correction unit 90 recognizes the difference between the first upper surface Wa1 and the second upper surface Wa2 of the plate-shaped work W (for example, the difference D1). For example, it is assumed that the difference D1 recognized by the correction unit 90 is not 0, and the second upper surface Wa2 is higher than the first upper surface Wa1 of the plate-shaped work W. In this case, the cutting feed means 12 moves the holding table 30 that sucks and holds the plate-shaped work W to the start position of the cutting feed in the + Y direction slightly below the first cutting means 6A and the second cutting means 6B. The second cutting means 6B, which cuts the second upper surface Wa 2 farther from the holding surface 300 of the holding table 30, is the second height adjusting means 26 under the control of the control means 9. It is brought closer to the holding surface 300 by a distance corresponding to the difference D1. That is, as shown in FIG. 13, under the control of the control means 9, the motor 262 of each second height adjusting means 26 rotates the shaft 260, so that the male screw 260a of the shaft 260 becomes the second housing 641. It is further screwed into the female screw 641c of. As a result, the spring 261 which had a natural length contracts and descends toward the holder 255 in which the second housing 641 is fixed, so that the second cutting means 6B has the holding surface 300 (FIG. FIG. It approaches 13 by a distance corresponding to the difference D1 (not shown). In FIG. 13, the second cutting means 6B and the like before the descent are shown by a solid line, and the second cutting means 6B and the like after the descent are shown by a two-dot chain line after being shifted next to the second cutting means 6B and the like.
Further, if the height of the first upper surface Wa1 of the plate-shaped work W measured by the first upper surface height measuring means 15 is not a preset value, the first height is adjusted by the difference from the preset value. The first bite 62 and the second bite 66 whose height difference is made zero by the second height adjusting means 26 are adjusted to a predetermined height by moving the elevating block 253 in the Z-axis direction by the means 25. After that, the upper surface Wa of the plate-shaped work W after cutting is subjected to re-cutting to eliminate the difference in height.

After the second cutting means 6B is brought closer to the holding surface 300 by a distance corresponding to the difference D1, the holding table 30 shown in FIG. 11 is sent in the −Y direction, and the second bite 66 has a plate shape. The second upper surface Wa2 of the work W is cut, and the height of the second upper surface Wa2 becomes the same as the height of the first upper surface Wa1. That is, it is possible to prevent a difference in height from occurring on the upper surface Wa of the plate-shaped work W after cutting due to a difference between the amount of wear of the first bite 62 and the amount of wear of the second bite 66. ..

1: Tool cutting device 10: Base 17: Column 18: Column 12: Cutting feed means 120: Motor 121: Ball screw 21: First height adjusting means 210: Ball screw 211: Pair of guide rails 212: Motor 213: Elevating block 214: Holder 22: Second height adjusting means 220: Ball screw 221: A pair of guide rails 222: Motor 223: Elevating block 224: Holder 30: Holding table 300: Holding table holding surface 31: Bellows cover 6A: First Cutting means 60: 1st spindle unit 600: 1st rotary shaft 601: 1st housing 602: 1st motor 61: 1st long flange 62: 1st tool bit 620: shank 621: cutting edge 629: Mounting part 6B: Second cutting means 64: Second spindle unit 640: Second rotating shaft 641: Second housing 642: First motor 65: Second long flange 66: Second Bit 660: Shank 661: Cutting blade 669: Mounting part W: Plate-shaped work Wa: Top surface (cut surface) of plate-shaped work
1A: Tool cutting device 6C: First cutting means 672: Main motor 6D: Second cutting means 69: Driven rotation means 1B: Tool cutting device 23: Second height adjusting means 24: Second height adjustment Means 1C: Tool cutting device 25: First height adjusting means 26: Second height adjusting means 260: Shaft 260a: Male screw 261: Spring 262: Motor 263: Bracket

Claims (3)

A holding table having a holding surface for holding the plate-shaped work and a rotation axis extending in a direction perpendicular to the holding surface are rotated to rotate a cutting tool to cut the upper surface of the plate-shaped work held by the holding table. and cutting means, and cutting feed means for the said holding table and said cutting means to relatively cutting feed in a direction parallel to the holding surface, to approach or vertically spaced to the cutting means with respect to said holding surface A cutting tool equipped with a height adjusting means,
The cutting means includes at least two first cutting means and a second cutting means arranged in parallel in a direction orthogonal to the cutting feed direction.
The first cutting means and the second cutting means, respectively, and connected to the tip of the rotating shaft extending in a direction orthogonal to the rotation axis, at a position away in the perpendicular direction from the rotary shaft A plate-shaped flange that holds a bite, orbits the bite around the axis of rotation, and the bite that orbits around the other axis of rotation does not reach the other axis of rotation in the orthogonal direction. And a spindle unit having a motor for rotating the rotating shaft and rotatably supporting the rotating shaft.
The rotation axis of the first cutting means and the rotation axis of the second cutting means are located on the same straight line in a direction orthogonal to the cutting feed direction.
The direction in which the rotation direction of the rotation axis of the first cutting means and the rotation direction of the rotation axis of the second cutting means are opposite to each other.
The first and the trajectory of the byte orbiting around the said axis of rotation of the cutting means, the locus of the byte orbiting around the said rotation axis of said second cutting means, the heavy not allowed by the plate-shaped workpiece Tool cutting device to cut. A holding table having a holding surface for holding the plate-shaped work and a rotation axis extending in a direction perpendicular to the holding surface are rotated to rotate a cutting tool to cut the upper surface of the plate-shaped work held by the holding table. and cutting means, and cutting feed means for the said holding table and said cutting means to relatively cutting feed in a direction parallel to the holding surface, to approach or vertically spaced to the cutting means with respect to said holding surface A cutting tool equipped with a height adjusting means,
The cutting means includes at least two first cutting means and a second cutting means arranged in parallel in a direction orthogonal to the cutting feed direction.
The first cutting means and the second cutting means, respectively, and connected to the tip of the rotating shaft extending in a direction orthogonal to the rotation axis, at a position away in the perpendicular direction from the rotary shaft A plate-shaped flange that holds a bite, orbits the bite around the axis of rotation, and the bite that orbits around the other axis of rotation does not reach the other axis of rotation in the orthogonal direction. And a spindle unit that rotates the rotating shaft to rotate the bite, and a driving motor that rotates the rotating shaft of either the first cutting means or the second cutting means. The driven rotating means is provided with a driven rotating means for driven rotation of the rotating shaft of the other cutting means by the rotation of the rotating shaft of the one cutting means rotated by the driving motor.
The rotation axis of the first cutting means and the rotation axis of the second cutting means are located on the same straight line in a direction orthogonal to the cutting feed direction.
The direction in which the rotation direction of the rotation axis of the first cutting means and the rotation direction of the rotation axis of the second cutting means are opposite to each other.
The first and the trajectory of the byte orbiting around the said axis of rotation of the cutting means, the locus of the byte orbiting around the said rotation axis of said second cutting means, the heavy not allowed by the plate-shaped workpiece Tool cutting device to cut. A first upper surface height measuring means for measuring the height of the upper surface of a plate-shaped work having a cutting mark formed by the cutting tool of the first cutting means, and a first upper surface height measuring means.
A second upper surface height measuring means for measuring the height of the upper surface of a plate-shaped work in which a cutting mark is formed by the cutting tool of the second cutting means, and a second upper surface height measuring means.
When there is a difference between the first upper surface height measured by the first upper surface height measuring means and the second upper surface height measured by the second upper surface height measuring means, the first upper surface height is used. It is farther from the holding surface so that the height of the upper surface of the second upper surface, which is farther from the height of the holding surface of the holding table, matches the height of the upper surface closer to the holding surface. The bite cutting device according to claim 1 or 2, further comprising a correction unit for bringing a cutting means for cutting one upper surface closer to the holding surface by a distance corresponding to the difference.

Images