JP2008126322A - Cutting tool working method and cutting tool working device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve working efficiency in a cutting tool working method and a cutting tool working device to process the surface of a work by relatively reciprocating the work with respect to a cutting tool on an XY flat surface. <P>SOLUTION: The cutting tool 25 is mounted to the XY flat surface which is the upper surface of the work 13 free to reversibly travel by a C axis with a vertical Z-axis as its rotating center and the work 13 is processed at forwarding by moving the work 13 forward by setting the direction of the cutting tool 25 so as to correspond to processing in the forward traveling of the work 13 by the rotation of the C axis as shown in Fig.5(A). Thereafter, the work 13 is processed also in reverse traveling by reversely traveling the work 13 by setting the direction of the cutting tool 25 so as to correspond to processing in the reverse traveling of the work 13 by reversing the direction of the cutting tool 25 as shown in Fig.5(B). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention, for example, uses a planar machine tool to reciprocate a work that needs to be finely processed relative to a cutting tool on an XY plane, and on the surface of the work, for example, a liquid crystal display device, a plasma display device, or other thin type The present invention relates to a bite processing method and a bite processing apparatus for processing a large number of fine grooves on an article requiring a mold or a fine structure for a light guide plate, a polarizing plate, a diffusion plate, etc. for a display device. Related to improvement.

  When an article requiring a fine structure as described above, for example, a mold, is taken up, such a mold has a large number of fine grooves, and a cutting tool is used for the processing. On the other hand, it is performed by reciprocating a workpiece, which is a material of a mold, on the XY plane (see, for example, Patent Document 1).

  As described above, a planar machine tool is generally used for the bite machining performed by reciprocating the workpiece on the XY plane relative to the bite. This planar machine tool reciprocates the workpiece on the XY plane, for example, in the X-axis direction, and the cutting tool maintains the position in the Z-axis direction perpendicular to the XY plane at a predetermined value and does not move in the X-axis direction. The position in the Y-axis direction is changed for each reciprocation of the workpiece.

Since the cutting tool has a rake angle and a clearance angle and has a so-called machining direction, it can be machined only in one of forward and backward movements of the reciprocating movement of the workpiece. By the way, since it is necessary to process a large number of fine grooves, the above-described mold requires a tremendous number of reciprocating motions of the workpiece, and the processing takes a long time.
JP-A-2005-279918

  In recent years, a thin display panel such as a large liquid crystal panel has appeared and tends to be increased in size. Along with this, molds such as a light guide plate and a light shielding sheet have a side of about 300 mm to 800 mm, further 1500 mm, and the time required for processing one mold may be 1 to 2 weeks.

  It is an object of the present invention to provide a tool processing method and tool capable of improving the processing efficiency of tool processing for processing the surface of the workpiece by reciprocating the workpiece on the XY plane relative to the tool. It is aimed.

  In order to achieve the above object, a cutting tool machining method according to the present invention is a cutting tool machining method in which a workpiece is reciprocated on an XY plane relative to the cutting tool to machine the surface of the workpiece. A step of reversibly mounting by a C-axis having a vertical Z-axis as a rotation center, a step of setting the direction of the cutting tool so as to correspond to machining during the forward movement of the workpiece by rotation of the C-axis, and then the workpiece A forward machining step in which the workpiece is machined by the cutting tool, and after the forward machining step, the direction of the cutting tool is reversed by the C-axis, and the cutting tool is moved when the workpiece is moved backward. And a backward machining step of machining the workpiece with the cutting tool, and then moving the workpiece backward. .

  Note that the center of the tip of the cutting tool is preferably disposed on the axis of the C axis, and the direction of the cutting tool depends on the amount of deviation between the center of the tip of the cutting tool and the axis of the C axis. The set position of the byte may be corrected at the time of inversion. Furthermore, the workpiece may be a mold of a fine structure part, and may process a large number of grooves with the cutting tool, and at this time, the cutting tool has a chevron whose tip corresponds to the groove, It is preferable that the peak of the chevron is disposed on the axis of the C axis.

  In addition, a cutting tool according to the present invention for achieving the above object is a cutting tool for processing a surface of a workpiece by reciprocating the workpiece on an XY plane relative to the cutting tool. It is characterized in that it is attached so as to be able to be reversed by a C axis having a Z axis perpendicular to the XY plane as a rotation center.

  Note that the center of the tip of the cutting tool is preferably disposed on the axis of the C-axis.

  The present invention provides a cutting tool and a cutting tool for processing a surface of a workpiece by reciprocating the workpiece on the XY plane relative to the cutting tool as described above, wherein the cutting tool has a Z axis perpendicular to the XY plane. With the C-axis centered on the center of rotation, it can be reversed so that it can handle both forward and backward movements of the workpiece, and machining is performed both during forward and backward movement of the workpiece. An effect that can be shortened to almost half is obtained.

If the center of the cutting tool is arranged on the axis of the C axis, there is an advantage that the position of the cutting tool tip does not change even if the direction of the cutting tool is reversed. However, even if there is a deviation between the center of the tip of the cutting tool and the axis of the C axis, the setting position of the tool is corrected by reversing the direction of the cutting tool according to the amount of the deviation, thereby Position change can be suppressed.
In addition, the present invention can exert a great effect in a bite machining that requires a large number of reciprocations as in the case of machining a large number of grooves with the bite as a workpiece is a die of a fine structure part. At this time, if the cutting edge of the cutting tool forms a chevron corresponding to the groove and the apex of the chevron is arranged on the axis of the C axis, the cutting tool can be reversed even if the direction of the cutting tool is reversed. The advantage is obtained that the position of the vertex does not change.

  An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic front view showing an example in which the present invention is applied to a planar machine tool, and FIG. 2 is a right side view of FIG. In FIG.1 and FIG.2, 10 is a bed and 11 is a table. The table 11 is placed on the bed 10 in a direction perpendicular to the paper surface in FIG. 1 and in a horizontal direction (X-axis direction) in FIG. 2 in parallel with the upper surface of the table 11 by a driving device such as a linear motor (not shown). It is mounted to move the range at a predetermined speed. A vacuum chuck 12 is attached on the table 11, and a flat work 13 is sucked and held by the vacuum chuck 12.

  Columns 14 and 14 are raised on both side surfaces of the bed 10, and a table 11 is provided at the upper end of both columns 14 in the left-right direction in FIG. 1 and in the direction perpendicular to the paper surface (Y-axis direction) in FIG. A cross rail 15 extending in parallel with the upper surface of the cable is attached to the cross rail 15. A saddle 16 is mounted on the cross rail 15 so as to be movable in the Y-axis direction and stopped at a predetermined position by a driving device such as a linear motor (not shown).

  The saddle 16 is mounted with a lifting platform 17 that can move in the vertical direction, that is, in the vertical direction (Z-axis direction) with respect to the upper surface (XY plane) of the table 11 in FIGS. The lift 17 is lifted and lowered by a drive device such as a linear motor (not shown) similar to the servo motor 18 attached to the saddle 16 or the table 11 and the saddle 16 and stopped at a predetermined position.

  A tool turning table 19 is attached to the lifting table 17. A main shaft (C axis) 20 extending parallel to the Z axis is rotatably attached to the tool reversing table 19, and this main shaft (C axis) 20 is described later by a servo motor 21 attached to the tool reversing table 19. Is given a rotation of 180 °.

  As shown in an enlarged view in FIGS. 3 and 4, a bite holder 22 is attached to the tip of the main shaft (C-axis) 20 with a bolt 23. The cutting tool holder 22 has a groove 24 extending vertically. A cutting tool 25 is inserted into the groove 24, and the cutting tool 25 is fastened and fixed to the cutting tool holder 22 by a holding plate 26 and a bolt 27.

  As shown in FIG. 3, the cutting tool 25 has a chevron shape corresponding to the shape of the machining groove 13A shown in FIGS. 6 (a) and 6 (b). As shown in FIGS. 3 and 4, the mountain-shaped apex 25 </ b> A is attached so as to be positioned on the axis of the main shaft (C-axis) 20. As shown in FIG. 4, the cutting tool 25 has a rake angle α (which may be zero or negative) and a clearance angle β, and the cutting tool 25 is processed by moving from right to left in FIG. 4. Show.

  Next, the operation of this apparatus and the cutting method of the present invention will be described. First, in order to adjust the position of the cutting tool 25 in the Z-axis direction to the depth of the machining groove 13A, the height of the lifting platform 17 is determined by the servo motor 18 shown in FIGS. 1 and 2, and the Y of the saddle 16 is driven by a driving device (not shown). The position in the axial direction is positioned at the processing position of the first processing groove 13A.

  Next, the table 11 is reciprocated in the X-axis direction at a predetermined speed suitable for cutting of the cutting tool to perform cutting tool processing. The table 11 is shown in FIG. 5 (B) from the left end position on the bed 10 shown in FIG. The process of moving to the right end position on the bed 10 is defined as the forward movement. At the time of this forward movement, the cutting tool 25 is set leftward in the drawing as shown in FIG. 5 (a), and the machining groove 13A is cut into the workpiece 13 moving from left to right in FIG. 5 (b). To do. 6A is a view of FIG. 5A viewed from the left, and shows a state immediately before the start of machining in the second forward movement instead of the first in order to represent the shape of the machining groove 13A. ing.

  As shown in FIG. 5 (B), when the workpiece 13 reaches the right end and the cutting at the time of forward movement is finished, and the workpiece 13 is separated from the cutting tool 25 to the right in FIG. 5 (B), the saddle 16 is moved to the cross rail. 15 is moved in the Y-axis direction, and as shown in FIG. 6B, the cutting tool 25 is moved rightward in the drawing by one pitch of the machining groove 13A.

  Along with the movement of the cutting tool 25 in the Y-axis direction, the main shaft (C-axis) 20 is rotated 180 ° by the servo motor 21 to reverse the direction of the cutting tool 25 as shown in FIGS. At this time, since the cutting tool 25 only rotates, there is no movement in the Z-axis direction. Therefore, there is no change in the height position of the vertex 25A, and the tool 25 is maintained at a constant height position. Further, as shown in FIGS. 3 and 4, since the vertex 25A is arranged on the axis of the main axis (C axis) 20, there is no misalignment of the vertex 25A in the Y axis direction due to the inversion. The cutting edge portion of the cutting tool 25 is accurately positioned at a position moved in the Y-axis direction by one pitch.

  Note that if there is a deviation between the vertex 25A and the axis of the main axis (C axis) 20, the vertex 25A is displaced in the Y-axis direction along with the reversal. The amount of deviation is measured in advance without making the value completely zero, and the amount of movement of the saddle 16 in the Y-axis direction is corrected in accordance with the amount of deviation, whereby the vertex 25A is formed in the machining groove 13A. It may be possible to accurately move by one pitch.

  After reversing the cutting tool 25 as described above, the table 11 is moved from the right end position on the bed 10 shown in FIG. 5B to the left end position on the bed 10 shown in FIG. The machining groove 13A is also cut during movement.

  When the machining at the time of the backward movement is completed, the cutting tool 25 is reversed to return to the state shown in FIG. 5 (a), and the machining at the next forward movement is performed. Thereafter, the processing at the time of backward movement and forward movement is repeated in the same manner.

  In the embodiment described above, an example in which a planar machine tool is used to reciprocate the workpiece 13 with respect to the cutting tool 25 has been shown, but the present invention is not limited to this, and the cutting tool 25 is reciprocated. You may do it. In addition, the object to be processed is not limited to a mold of a fine structure part such as a light guide plate for liquid crystal or a light shielding sheet, but can be applied to processing various workpieces, and the processing shape is not limited to a groove. Various modifications are possible, such as simple flat surface machining with a flat tool.

  The present invention can be applied to a whole bite machining method and a bite machining apparatus in which a workpiece is cut by a bite by relatively reciprocating the bite and the workpiece using a planar type machine tool or the like.

1 is a schematic front view showing a planar machine tool to which the present invention is applied. The right view of FIG. The partially expanded detailed sectional view by the AA line of FIG. FIG. 4 is a partially enlarged detail cross-sectional view taken along line BB in FIG. 3. It is a principal part expanded side view for demonstrating the bite processing method of this invention, (A) shows the state just before forward machining, (B) shows the state just before backward machining. FIG. 5A is a view of FIG. 5A, and FIG. 5B is a view of FIG. 5B viewed from the left.

Explanation of symbols

10 bed 11 table 12 vacuum chuck 13 work 13A machining groove 14 column 15 cross rail 16 saddle 17 lifting table 18 servo motor 19 byte reversing table 20 spindle (C axis)
21 Servo motor 22 Tool holder 23 Bolt 24 Groove 25 Tool 25A Top of tool 26 Presser plate 27 Bolt

Claims (7)

In a tool processing method for processing the surface of a workpiece by reciprocating the workpiece on an XY plane relative to the tool,
Attaching the bite so as to be reversible by a C axis with a Z axis perpendicular to the XY plane as a rotation center;
Setting the direction of the bite to correspond to machining during the forward movement of the workpiece by rotation of the C-axis;
Next, the workpiece is moved forward, and the workpiece is processed by the cutting tool, the forward machining step,
Reversing the direction of the cutting tool by the C-axis after the forward machining step, and setting the direction of the cutting tool to correspond to machining when the workpiece is moved backward;
Next, the workpiece is moved backward, and a backward machining step of machining the workpiece with the cutting tool;
A tool processing method characterized by comprising:   The cutting tool processing method according to claim 1, wherein a center of the tip of the cutting tool is disposed on an axis of the C axis.   2. The cutting tool processing method according to claim 1, wherein a setting position of the cutting tool is corrected at the time of reversing the direction of the cutting tool in accordance with a deviation amount between a center of the tip of the cutting tool and an axis of the C axis.   4. The cutting tool processing method according to claim 1, wherein the workpiece is a die of a fine structure part, and a plurality of grooves are processed by the cutting tool.   5. The cutting tool processing method according to claim 4, wherein a tip of the cutting tool forms a chevron corresponding to the groove, and an apex of the chevron is arranged on an axis of the C axis. In a tool processing apparatus for processing the surface of a work by reciprocating the work on an XY plane relative to the tool,
The cutting tool is attached such that the direction of the cutting tool is reversible by a C axis having a Z axis perpendicular to the XY plane as a rotation center.   The cutting tool processing method according to claim 1, wherein a center of the tip of the cutting tool is disposed on an axis of the C axis.

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