JP4211248B2 - Cutting edge polishing method and cutting edge polishing apparatus for coating tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting edge polishing method and a cutting edge polishing apparatus for polishing a cutting edge portion of a coating tool used for applying a thin layer to a traveling flexible belt-like support.
[0002]
[Prior art]
Conventionally, in order to form thin films such as magnetic tapes and multilayer ceramic capacitors, a thin film that travels is used as a flexible belt-like support, and a thin film such as a magnetic material or green sheet is applied as a coating solution on this tool. Is used.
For example, as shown in FIG. 5, such a coating tool has two base metals 11, 11 that face each other, and a pocket 12 and a pocket in which a coating liquid is supplied between the base metals 11, 11. A slot 13 extending from 12 to the distal end side of the base metal 11 is formed.
[0003]
And the notches 14 and 14 are formed at the tips of the base metals 11 and 11, and the long blade edge portions 15 and 15 made of cemented carbide are fixed to the notches 14 and 14, respectively. The base metal 11 protrudes from the tip of the base plate 11 by a certain length, and the gap between the blade edge portions 15, 15 forms an opening of the slot 13.
Such an application tool is mounted on an application device and both end faces are sealed, and then, as shown in FIG. It travels at a constant speed in contact with the tip surfaces 15A and 15A (the traveling direction is a white arrow in the figure) and is uniformly applied to the flexible belt-like support C.
[0004]
[Problems to be solved by the invention]
By the way, in this type of coating tool, depending on factors such as the nature of the coating liquid to be coated, the tip surface 15A (a part of) the blade edge portion 15 has a substantially circular arc shape (elliptical arc shape) as shown in FIG. May form.
Thus, when the tip surface 15A of the blade edge portion 15 is formed to have a substantially circular arc shape (elliptical arc shape), conventionally, as shown in FIG. 7 and FIG. The outer peripheral grinding surface SA and the tip surface 15A of the blade edge portion 15 are divided into the longitudinal direction P of the front end surface 15A and the tangential direction Q of the total grinding wheel S. And the tip grindstone S is rotated about the axis O while the tip surface 15A of the blade edge portion 15 is reciprocated in the longitudinal direction P thereof, so that the tip surface 15A has a substantially arcuate cross section. A polishing method is employed.
[0005]
However, in such a polishing method, since the feed movement direction (longitudinal direction P) of the front end surface 15A of the blade edge portion 15 with respect to the total grinding wheel S and the tangential direction Q of the total grinding wheel S are the same, the outer peripheral grinding surface The cutting direction of the SA abrasive grains with respect to the tip surface 15A is always the same in the forward path and the return path in the feed movement direction of the tip surface 15A. A deep swell or streak will occur along the line.
The undulations and streaks thus generated have become a major problem in causing variations in film thickness and coating unevenness when the coating solution is applied.
[0006]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a cutting edge polishing method and a cutting edge polishing apparatus for a coating tool that do not cause undulation or streaking on the tip surface of the cutting edge portion.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve such an object, the coating tool cutting edge polishing method according to the present invention includes a long blade tip portion formed at the tip of a base metal constituting the coating tool. A cutting edge polishing method for a coating tool that polishes a surface into a substantially arcuate cross section, wherein the tip end surface of the cutting edge portion is placed on the outer peripheral grinding surface of a general-purpose grindstone formed in a substantially concave arcuate cross section. The longitudinal grindstone is rotated around its axis while the longitudinal direction and the tangential direction of the grindstone are abutted so as to have a predetermined crossing angle, and the tip surface of the blade edge portion is relatively moved in the longitudinal direction. In the polishing process, while increasing the intersection angle between the longitudinal direction of the tip surface and the tangential direction of the total-type grindstone, the contact point between the front-end surface and the outer peripheral grinding surface is changed to The total type grindstone is moved so as to move from the center in the width direction toward both sides. While moving away from the end face, or reducing the crossing angle between the longitudinal direction of the tip face and the tangential direction of the total grindstone, the contact point between the tip face and the peripheral grinding surface is The total grindstone is moved in a direction approaching the tip surface so as to shift from both sides in the width direction of the mold grindstone toward the center.
Further, the cutting edge polishing apparatus of the coating tool according to the present invention, the cutting edge polishing apparatus of the coating tool for polishing the front end surface of the elongated cutting edge formed at the tip of the base metal constituting the coating tool substantially arcuate cross section And a moving mechanism for supporting the base metal constituting the coating tool and relatively moving in the longitudinal direction of the tip surface of the cutting edge of the base metal, and an overall grinding wheel whose outer peripheral grinding surface has a substantially concave arc shape in cross section And a grindstone rotating mechanism for rotating the total-type grindstone about its axis, with the front-end surface of the cutting edge being in contact with the outer peripheral grinding surface of the total-type grindstone. The tip surface and the outer periphery are attached to the base via a crossing angle changing mechanism that enables changing a crossing angle formed by the direction and the tangential direction of the total grinding wheel, and the crossing angle is changed by the crossing angle changing mechanism The contact point with the grinding surface With the movement in the width direction of the mold grindstone, provided with the grinding wheel moving mechanism to change the distance between the tip surface and the forming grindstone to maintain contact between the distal end surface and the outer circumferential grinding surface, the While increasing the crossing angle between the longitudinal direction of the front end surface and the tangential direction of the total grinding wheel, the contact point between the front end surface and the outer peripheral grinding surface is shifted from the center in the width direction of the total grinding stone toward both sides. The tip grindstone is moved in a direction away from the tip end surface, or the front end surface and the outer periphery are reduced while reducing the crossing angle between the longitudinal direction of the tip end surface and the tangential direction of the tip grindstone. The intersecting angle changing mechanism and the grindstone are moved so that the grindstone moves in a direction approaching the tip surface so that the contact point with the grinding surface moves from both sides in the width direction of the grindstone toward the center. The moving mechanism is NC controlled .
According to the present invention as described above, the cutting direction of the abrasive grains with respect to the tip surface of the blade tip portion by the outer peripheral grinding surface of the general-purpose grindstone differs between the forward path and the return path in the feed movement direction of the tip surface of the blade tip portion. Therefore, it is possible to polish so as to erase the undulations and streaks generated on the tip surface.
In addition, by changing the intersection angle between the tangential direction of the grinding wheel and the longitudinal direction of the tip of the cutting edge, the tip of the cutting edge is polished into a substantially circular arc shape (elliptical arc) with various radii of curvature. Can be processed.
[0008]
In the cutting edge polishing method according to the present invention, the contact position between the tip surface and the outer peripheral grinding surface is increased while increasing the crossing angle between the longitudinal direction of the tip surface and the tangential direction of the total grinding wheel. The total-type grindstone is moved in a direction away from the tip surface so as to move toward both sides from the center in the width direction of the grindstone, or the crossing angle between the longitudinal direction of the tip surface and the tangential direction of the total-type grindstone The total grindstone is moved in a direction approaching the tip surface so that the contact point between the tip surface and the outer peripheral grinding surface is shifted from both sides in the width direction of the total grindstone toward the center. In the cutting edge polishing apparatus of the present invention, the width direction of the overall grindstone at the contact point between the tip surface and the outer peripheral grinding surface with the change of the crossing angle by the crossing angle changing mechanism Corresponding to the movement to the tip surface Serial includes a grindstone moving mechanism for maintaining the contact between said tip surface by changing the distance between the forming grindstone outer circumferential grinding surface, the intersection of the tangential direction of the longitudinal direction as the forming grindstone in the front end surface While increasing the angle, the total grindstone is moved away from the front end surface so that the contact point between the front end surface and the outer peripheral grinding surface is shifted from the center in the width direction of the total grindstone toward both sides. While moving or reducing the crossing angle between the longitudinal direction of the tip surface and the tangential direction of the total grinding wheel, the contact points between the tip surface and the outer peripheral grinding surface are arranged on both sides in the width direction of the total grinding wheel. The crossing angle changing mechanism and the grindstone moving mechanism are NC-controlled so that the total grindstone is moved in the direction approaching the tip surface so as to shift from the center to the center. On the tip surface of the cutting edge by the grinding surface of the grinding wheel Always changing the abrasive grains cut direction and can more reliably suppress the waviness and streaks that occur the distal end surface.
In addition, since the outer peripheral grinding surface of the general-purpose grindstone is used uniformly over substantially the entire surface, the shape change of the general-purpose grindstone can be suppressed, and high-precision polishing can be performed over a long period of time.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the same or similar parts as those of the above-described prior art will be denoted by the same reference numerals, and description thereof will be omitted.
FIG. 1 is a front view of a cutting edge polishing apparatus for a coating tool according to the present embodiment, FIG. 2 is a right side view of the cutting edge polishing apparatus, and FIGS. 3 and 4 are explanatory views showing how the cutting edge of the coating tool is polished according to the present embodiment. It is.
[0010]
The cutting edge polishing apparatus for a coating tool according to the present embodiment has a rectangular parallelepiped base 1 installed on a floor surface, and a vertical support 2 is attached to the rear center upper surface of the base 1.
A plurality of slide rails 3 are fixed to the upper surface of the base 1 in the front-rear direction, and a base plate 4 is attached on the slide rails 3 so as to be movable in the front-rear direction. A fixing mechanism (not shown) for fixing the base plate 4 is provided.
[0011]
On the upper surface of the base plate 4, a horizontal cover 5 which is long in the left-right direction and whose left and right ends stand is attached, and is reciprocated in the left-right direction by a drive mechanism (moving mechanism) built in the base plate 4. Yes.
A flat magnet chuck 6 is fixed horizontally on the upper surface of the cover 5 in the left-right direction, and a base metal 11 constituting the above-described application tool is provided on the magnet chuck 6 with its blade edge portion 15. The tip end face 15A is directed upward and is fixed by suction at an arbitrary position.
[0012]
On the other hand, a grindstone rotating mechanism 7 is attached to the center of the support column 2 so that the height can be adjusted. The grindstone rotating mechanism 7 rotates a grindstone shaft 8 that protrudes horizontally in a forward direction by a built-in motor (not shown), and the tip of the grindstone shaft 8 has a substantially concave arc shape (elliptical arc shape) in cross section. A flange (not shown) for fixing the overall grinding wheel S having the outer peripheral grinding surface SA is formed.
Further, a crossing angle changing mechanism (not shown) for changing the crossing angle α between the longitudinal direction P of the tip surface 15A of the blade edge 15 and the tangent line Q of the grinding wheel S is provided.
[0013]
Next, a cutting edge polishing method using such a cutting edge polishing apparatus for a coating tool will be described.
First, the position and orientation of the tip surface 15A of the blade edge 15 of the base 11 are adjusted and fixed by the magnet chuck 6, and the base plate 4 is adjusted in the front-rear direction along the slide rail 3.
Further, the height of the grindstone rotating mechanism 7 is adjusted so that the outer peripheral grinding surface SA of the total-type grindstone S is formed on the tip surface 15A of the cutting edge 15 with the longitudinal direction P of the tip surface 15A as shown in FIGS. The tangential direction Q of the overall grinding wheel S is brought into contact with a predetermined pressure so as to have a predetermined crossing angle α (α> 0 °).
[0014]
In this state, the crossing angle α formed by the longitudinal direction P of the tip surface 15A of the cutting edge 15 and the tangential direction Q of the total grinding wheel S is such that the tip surface 15A of the cutting edge 15 rotates as the total grinding wheel S rotates. It sets so that it may contact over the whole use range of outer periphery grinding surface SA.
Next, the cover 5 is reciprocated in the longitudinal direction P of the front end surface 15A of the blade edge portion 15 by the driving mechanism in the base plate 4, while the grindstone rotating mechanism 16 is operated to rotate the total grindstone S around the axis O. The tip surface 15A of the blade edge portion 15 is polished while keeping the intersection angle α constant.
[0015]
According to such a cutting edge polishing method and polishing apparatus for a coating tool, the grinding of the front end surface 15A by the outer peripheral grinding surface SA of the grinding wheel S on the forward and return paths in the feed movement direction given to the front end surface 15A of the cutting edge portion 15 is performed. The cutting direction of the grains is different, and polishing can be performed so that undulations and streaks generated by the conventional method are erased.
Then, undulations and streaks that occur on the tip surface 15A can be reliably suppressed, so that there is no variation in coating film thickness or coating unevenness applied to the flexible belt-like support C. A good application state can be maintained.
Further, the tip surface 15A of the blade edge portion 15 has various radii of curvature by appropriately changing the intersecting angle α formed by the longitudinal direction P of the tip surface 15A of the blade edge portion 15 and the tangential direction Q of the grinding wheel S. Polishing can be performed to have a substantially arc shape (elliptical arc shape) in cross section.
[0016]
Then, in this embodiment, the crossing angle α formed by the tangent Q of the longitudinal P and forming grindstone S of the front end surface 15A of the cutting edge portion 15, as the progress of the polishing, continue to change.
[0017]
That is, in the cutting edge polishing apparatus for a coating tool as described above, the crossing angle changing mechanism has a function of gradually changing the crossing angle α as the polishing progresses. Corresponding to the movement in the width direction of the total grinding wheel S at the contact point between the tip surface 15A of the cutting edge 15 and the outer peripheral grinding surface SA of the total grinding wheel S according to the change of the crossing angle by the mechanism, the front end surface 15A and the total mold A whetstone lifting / lowering (moving) mechanism (not shown) that moves the whetstone rotating mechanism 7 up and down (moves) so as to maintain the contact between the tip surface 15A and the outer peripheral grinding surface SA by changing the distance from the whetstone S. The crossing angle changing mechanism and the grindstone lifting mechanism are NC controlled.
[0018]
When polishing the front end surface 15A of the blade edge portion 15, for example, the front end surface 15A is first set by setting the crossing angle α to 0 ° and using the outer peripheral grinding surface SA at the central portion in the width direction of the total grinding wheel S. After the surface is polished, the crossing angle α is gradually increased and the total grinding wheel S is raised so as to be separated from the front end surface 15A, and the contact point between the front end surface 15A and the outer peripheral grinding surface SA is set at the position of the total grinding wheel S. Transition from the center in the width direction to both sides.
Further, by following this reverse process, the crossing angle α is gradually decreased and the total grinding wheel S is lowered in a direction approaching the tip surface 15A, so that the tip surface 15A and the outer peripheral grinding surface SA are brought into contact with each other. It is also possible to shift the location from the both sides in the width direction of the overall grinding wheel S to the center.
[0019]
According to such a cutting edge polishing method and polishing apparatus for a coating tool, the grinding of the front end surface 15A by the outer peripheral grinding surface SA of the grinding wheel S on the forward and return paths in the feed movement direction given to the front end surface 15A of the cutting edge portion 15 is performed. It becomes possible to always change the cutting direction of the grains, and it is possible to more reliably and effectively suppress the swells and streaks generated by the conventional method.
Furthermore, since the outer peripheral grinding surface SA of the overall grinding wheel S is used almost uniformly over the entire surface, the shape change of the overall grinding wheel S can be suppressed, the life of the grinding wheel can be extended, and the long-term high performance can be achieved. Precision polishing can be performed.
[0020]
Moreover, in this embodiment, although demonstrated with the application | coating tool using the two metal bases 11 and 11 which oppose, it is not limited to this, These metal bases are used using three or more metal bases. Of course, the cutting edge portion of the coating tool used for multi-layer coating may be polished by forming a slot therebetween.
Furthermore, the cutting edge portion made of cemented carbide is not fixed to the base metal, but the tip surface of the cutting edge part formed integrally with the base metal may be polished.
[0021]
【The invention's effect】
According to the present invention, the front end surface of the blade tip portion is polished by providing a predetermined crossing angle between the longitudinal direction of the front end surface of the blade tip portion and the tangential direction of the total grinding wheel. Polishing so that undulations and streaks generated on the tip surface of the cutting edge portion are erased by the difference in the cutting direction of the abrasive grains with respect to the tip surface of the cutting edge portion due to the outer peripheral grinding surface of the grinding wheel in the forward path and the return path in the feed movement direction can do.
Therefore, it is possible to reliably suppress undulations and streaks that occur on the tip surface of the blade edge portion, and it is favorable without causing variations in coating film thickness or coating unevenness applied to the flexible belt-like support. The application state can be maintained.
[Brief description of the drawings]
FIG. 1 is a front view showing a cutting edge polishing apparatus for a coating tool according to an embodiment.
FIG. 2 is a right side view showing a cutting edge polishing apparatus for a coating tool according to the present embodiment.
FIG. 3 is an explanatory view showing a state of edge cutting of a coating tool according to the present embodiment.
FIG. 4 is an explanatory diagram showing a state of polishing of the cutting edge of the coating tool according to the present embodiment.
FIG. 5 is a perspective view showing a conventional application tool.
FIG. 6 is an enlarged view of a main part showing a tip portion of a conventional coating tool.
FIG. 7 is an explanatory view showing a state of edge cutting of a conventional coating tool.
FIG. 8 is an explanatory view showing a state of cutting edge cutting of a conventional coating tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 4 Base plate 5 Cover 7 Grinding wheel rotating mechanism 8 Grinding wheel shaft 11 Base 15 Cutting edge 15A Tip surface S Total grinding wheel SA Outer peripheral grinding surface P Longitudinal direction Q of the leading edge surface of the cutting edge Q Tangent direction of total grinding wheel

Claims (2)

A cutting edge polishing method for a coating tool that polishes the distal end surface of a long blade tip portion formed at the distal end of a base metal constituting the coating tool into a substantially arc-shaped cross section,
The front end surface of the cutting edge portion is placed on the outer peripheral grinding surface of the general grindstone formed in a substantially concave arc shape in cross section so that the longitudinal direction of the front end surface and the tangential direction of the total grindstone have a predetermined crossing angle. Abut,
In performing polishing by rotating the total grinding wheel around its axis while relatively moving the tip surface of the cutting edge portion in the longitudinal direction,
While increasing the crossing angle between the longitudinal direction of the tip surface and the tangential direction of the total grinding wheel,
Moving the total grinding wheel in a direction away from the front end surface so that the abutting portion between the front end surface and the outer peripheral grinding surface moves from the center in the width direction of the total grinding wheel toward both sides;
Alternatively, while reducing the crossing angle between the longitudinal direction of the tip surface and the tangential direction of the total grinding wheel,
Moving the total-type grindstone in a direction approaching the front-end surface so as to shift a contact portion between the front-end surface and the outer peripheral grinding surface from both sides in the width direction of the total-type grindstone toward the center. A method for polishing the cutting edge of a coating tool. A cutting edge polishing device for a coating tool that polishes the tip surface of a long blade tip formed at the tip of a base metal constituting the coating tool into a substantially arc-shaped cross section ,
A support mechanism for supporting the base metal constituting the coating tool, and a moving mechanism for relatively moving in the longitudinal direction of the distal end surface of the base edge of the base metal;
A grindstone rotating mechanism for supporting a general grindstone having a substantially concave arc shape in outer peripheral grinding surface and rotating the total grindstone about its axis,
Crossing angle change that enables changing the crossing angle formed by the longitudinal direction of the tip surface and the tangential direction of the grinding wheel with the tip surface of the cutting edge portion in contact with the outer peripheral grinding surface of the grinding wheel Attach to the base via the mechanism,
Corresponding to the movement in the width direction of the overall grindstone of the contact point between the tip surface and the outer peripheral grinding surface with the change of the crossing angle by the crossing angle changing mechanism,
A grindstone moving mechanism that maintains the contact between the tip surface and the outer peripheral grinding surface by changing the distance between the tip surface and the total grinding wheel ,
While increasing the crossing angle between the longitudinal direction of the tip surface and the tangential direction of the total grinding wheel,
Moving the total grinding wheel in a direction away from the front end surface so that the abutting portion between the front end surface and the outer peripheral grinding surface moves from the center in the width direction of the total grinding wheel toward both sides;
Alternatively, while reducing the crossing angle between the longitudinal direction of the tip surface and the tangential direction of the total grinding wheel,
To move the total grinding wheel in a direction approaching the front end surface so that the contact portion between the front end surface and the outer peripheral grinding surface is shifted from both sides in the width direction of the total grinding wheel toward the center.
The cutting edge polishing apparatus for an application tool, wherein the crossing angle changing mechanism and the grindstone moving mechanism are NC-controlled .

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