JPH0623406Y2 - Whetstone position adjusting device for cutter sander - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention is a grinder position adjusting device for a cutter grinder that determines the relative position of the grindstone and the disk cutter when the disc cutter is set on the grinder and polished. Regarding

<Prior Art> Conventionally, for example, as a polishing machine of a disk cutter used for cutting lead wires of electronic parts of a printed wiring board, etc., are disclosed in Japanese Utility Model Publication Nos. 60-103640 and 61-81866. Things are known.

In the above polishing machine, a disk cutter is vertically and rotatably rotatably supported on a polishing machine body serving as a base, and a disk-shaped or cup-shaped diamond grindstone driven to rotate by a motor is opposed to a peripheral end surface of an edge of the disk cutter. At the very least, move or adjust the cutter or grindstone in the mutual axial direction (front-back direction) and in the direction intersecting the axial center (horizontal direction), and adjust the axial center of the grindstone vertically or horizontally, The grinding surface of the grindstone is pressed against the cutter edge from the position and angle.

<Problems to be solved by the invention> However, in the above cutter polishing machine, the ring-shaped polishing surface formed on the inner peripheral surface of the end face of the cup-shaped grindstone is brought into contact with the polishing surface of the cutter at one or two points to perform polishing. Therefore, it is difficult to adjust the position and angle of the grindstone with respect to the cutter, the blade angle of the cutter edge changes every time polishing is performed, and the sharpness becomes unstable, and the blade itself becomes a claw blade due to repeated polishing and the cutting performance deteriorates. There was a problem that it was easy to do.

<Means for Solving Problems> A grindstone position adjusting device for a sanding machine according to the present invention for solving the above problems has a ring-shaped barb having a cutting edge angle formed on an outer peripheral edge and inclined with respect to an axis. The cutter support shaft 17 that rotatably supports the disc cutter A having the surface 3 is rotatably driven.
1. A rotary grindstone B having a grinding surface 6 which is supported substantially horizontally on 1 and has a ring-shaped inclined surface which is inclined in a concave shape toward the axis at the outer peripheral edge, is attached to the bald surface 3 of the disc cutter A. And the cutter support shaft 1 can be rotatably driven on the polishing machine main body 11 so that the grinding surfaces 6 face each other and are pressed against each other for polishing.
7 and a shaft center thereof are supported substantially parallel to each other on the same horizontal plane, and the rotary grindstone is changed so as to change the position where the burr surface 3 of the disk cutter A and the grinding surface 6 of the rotary grindstone B intersect and contact with each other. The polishing machine main body 1 is provided with an adjusting table 23 that supports B by sliding it in a horizontal direction substantially at right angles to the rotating shafts of the two and adjusting the movement.
1, a gauge C indicating the movement adjusting position of the rotary grindstone B with respect to the disc cutter A is moved and adjusted on the adjusting table 23 in a direction substantially perpendicular to the axis of the rotary grindstone B and in a horizontal direction. It is characterized by being freely installed.

<Operation> In the cutter polishing with the above-described device, the ring-shaped grinding surface 6 of the grindstone B is changed to the ring-shaped bald surface 3 of the cutter A while changing the inclination and direction of the front, rear, left and right position axes of the grindstone B. By crossing and pressing together while rotating,
The bald surface 3 of the cutter A is ground with the grinding surface 6.

Depending on the position and orientation of the cutter A and the grindstone B at this time, the grinding surface 6 of the grindstone B abuts at one or two points of the ring-shaped grinding surface 6 so as to fit the bald surface 3 of the cutter A, By polishing the bald surface 3, a predetermined cutting edge angle is formed.

In the polishing state, the grinding surface 6 of the grindstone B is in contact with the bald surface 3 of the cutter A so that the cutting edge angle of the cutter A is polished in the most appropriate state. Based on the mounting position, the position of the grindstone B with respect to the cutter A having the same diameter in a direction substantially perpendicular to the rotation axis is confirmed. Then, at the time of polishing the cutter A or a cutter of the same kind and the same diameter next time, the mounting position of the gauge C is again set to the previous position, and the predetermined left and right positions of the grindstone B are determined.

At this time, if the relative position or angle of the grindstone B to the cutter A has changed since the last polishing of the cutter, it is necessary to adjust the mounting position of the gauge C etc. based on the data of the previous polishing. When polishing the cutter A having the same diameter or the same diameter as that at the time, it is sufficient to confirm the movement adjustment position of the grindstone B with respect to the cutter A by the gauge C, and it is not necessary to adjust the left and right positions of the grindstone B.

As a result, the ring-shaped bagged surface 3 and the ground surface 6 intersect and contact with each other in the most appropriate state confirmed at the previous polishing, and polishing can be performed while maintaining a predetermined cutting edge angle.

In any of the above cases, when the cutter A having the ring-shaped slanted bald surface 3 is ground with the grindstone B having the ring-shaped concave slanted grinding surface 6, it is difficult to adjust the grindstone B for the cutter A. The position adjustment in the direction orthogonal to the rotation axis of is extremely easily and accurately performed.

<Embodiment> FIG. 3 is a cross-sectional view showing an embodiment of a grinding wheel for a cutter of the present invention. In this example, the main body 4 of the grinding wheel B has a circular taper cup shape as a whole, and a drive is provided at the center thereof. It has a boss 5 for fitting the shaft. The end surface formed on the concave portion of the outer periphery of the main body 4 forms a grinding surface 6 to which abrasive grains such as diamond are attached. The grinding surface 6 is a concave inclined surface having a constant inclination angle β from the peripheral end of the grindstone B toward the axial center side.

FIG. 1 is an overall perspective view of a polishing machine showing a state of carrying out cutter polishing with a grindstone of the present invention. A polishing machine body 11 is a mounting base 13 for mounting the polishing machine itself so that its position and orientation can be adjusted. A cutter support base 15 for rotatably supporting the cutter A to be ground is provided in parallel, and on the cutter support base 15, a support shaft 17 supported horizontally in the front-rear direction.
A disk-shaped cutter A is rotatably supported on the front end of the cutter with the bald surface 3 as the front surface. The support shaft 17 is rotatably supported by bearings 19 and 19, and is supported inside or on the upper surface of the cutter support base 15. It is a structure that is rotated relatively slowly by a drive device (not shown) provided.

On the other hand, the mounting base 13 is provided with a bed 21 in the left-right direction,
The bed 21 is provided with a lower adjusting table 23 which linearly travels left and right on the upper surface of the bed 21 so as to be driven by a lateral feed screw 25 axially supported in the bed and a handle 27 at the right end thereof. An upper adjustment table 29 and a motor support table 31 are sequentially stacked on the lower adjustment table 23, and a polishing wheel B is pivotally supported at the rear end of a bracket 33 which is upright at the front end of the motor support table 31. The motor 37 is attached in the front-rear horizontal direction.

The motor 37 is attached by inserting the front end of the motor through the bracket 33 and fastening and fixing the motor flange 39 to the rear surface of the bracket. The motor flange 39 is provided with adjusting screws 41, 41 at the upper left and right positions so that the front end of the motor flange 39 can abut the rear surface of the bracket 33.
Is screwed in, and by adjusting the screwing in, the vertical inclination angle of the motor shaft, that is, the grindstone B is adjusted and set.

The upper adjusting table 29 and the lower adjusting table 23 are connected to each other by a sliding portion 47 that slides in the front-rear direction by a "screw structure", and is attached to the vertical feed screw 49 inserted through the center and the front end of the screw. The handle 51 serves as a mechanism for adjusting and driving the motor support base 31 back and forth.

Further, the motor support base 31 is horizontally rotatably supported on the upper adjustment base 29, and the motor support base 3 is provided with an arcuate slit 45 along the rotation arc. The motor support base 31 is mounted on the upper adjustment base 29 and the horizontal angle of the grindstone B is adjusted and set by screwing the adjusting screw 46 into.

Cutter polishing with the above-described polishing machine changes the inclination and direction of the position axis of the grindstone B in the front, rear, left, and right directions, while changing the inclination and direction of the position axis of the grindstone B, as shown in FIGS. By crossing the ring-shaped bald surface 3 of No. 3 and pressing it while rotating it together, the grinding surface 6 has a cutter A.
Polish the rough surface.

Depending on the position and orientation of the cutter A and the grindstone B at this time, the grinding surface 6 of the grindstone B abuts at one or two points of the ring-shaped grinding surface 6 so as to fit the bald surface 3 of the cutter A, The bald surface 3 is ground to a predetermined cutting edge angle.

A gauge mount 29a is horizontally extended at the left end of the upper adjustment base 29, and an L-shaped bent base 60 forming the main body of the gauge C as shown in FIG. 2 is formed on the gauge mount 29a. However, a bolt 62 is inserted into and attached to a long hole 61 in the left-right direction on one side of the base 60. The other side of the base 60 projects rearward from the lower portion of the bracket 33 and substantially parallel to the cutter support shaft 17, and a pole 63 is fixedly erected at the tip thereof, and a boss 64 is provided at the upper end of the pole 63. Positioning portion 65 including a positioning bar
Is fitted so as to be horizontally rotatable.

The upper end surface of the pole 63 and the upper end surface of the boss 64 are provided with matching marks 66 when the positioning portion 65 for positioning is stopped forward. Further, a scale 67 for visually observing the mounting position of the base 60 in the left-right direction is provided on the corresponding side faces of the gauge mount 29a and the base 60.

In the gauge C, the left and right positions of the grindstone B are adjusted so that the grinded surface 6 of the grindstone B can contact the bald surface 3 of the cutter A having a specific outer diameter at the most suitable blade edge polishing angle. The positioning portion 65 in the forward facing state in which the marks 66, 66 are aligned is positioned and attached so as to abut the peripheral edge of the cutter A. At the time of polishing the cutter, as shown by the solid line in FIG. 2, the positioning portion 65 is horizontally rotated to the rear right so as not to interfere with the polishing of the cutter, and the angle of the grindstone B is finally adjusted to rotate the cutter A and the grindstone B. While doing so, the inner surface of the ground surface 6 is pressed against the bagged surface 3 of the cutter A to perform cutter polishing.

In this way, if the mounting position of the gauge C for a particular cutter A is determined by the scale 67, then the cutter A
When polishing, adjust the gauge A to the cutter A and restore the gauge mounting position when polishing before with the scale 67 to mount the gauge, or use only the specified polishing machine for a specific cutter. If it is not broken, polish the cutter with the gauge attached at the time of the previous polishing.

As a result, the attachment position of the gauge C is determined for a certain cutter, and the adjustment position in the left-right direction of the grindstone B is determined at the position where the gauge C abuts on the cutter peripheral surface. In the subsequent polishing, the left and right position of the grindstone B, which is the most difficult to adjust, is automatically determined according to the diameter of the cutter A. All cutters can be ground at different angles. For those that do not need to adjust the angle of the grindstone B, if the left and right positions of the grindstone B are determined,
The grinding can be performed simply by operating the handle 51 and pressing the grindstone B against the cutter A.

In addition, if the mounting position of the gauge C is always constant with respect to a specific cutter A in actual use, the cutting edge diameter becomes progressively smaller because the diameter of the cutter gradually decreases, so the lead angle becomes progressively obtuse. If this causes a problem in line cutting performance, it is possible to carry out a new polishing by slightly moving the gauge C to the left based on the gauge mounting position at the end of the previous cutter polishing each time polishing is performed. For example, the cutter A will always be ground with a substantially constant blade edge angle regardless of the reduction in diameter due to polishing.

Further, when it is desired to keep the blade angle of the cutter and the polishing surface substantially constant regardless of the size of the diameter, the correspondence between the diameter of the cutter A and the scale 67 is predetermined and the scale 67 is adjusted according to the cutter diameter. It is also possible to attach a gauge C and adjust the grinding stone B according to the gauge C.

<Effect of the Invention> As a result of being configured as described above, the present invention has a ring-shaped grinding surface inclined inward toward the axial direction with respect to the edge of the disc cutter rotatably supported. In a polishing machine that grinds by pressing cup-type or dish-type rotating grindstones against each other and pressing them against each other, it is always the most preferable with a specific cutter or a cutter with a constant diameter to perform polishing while maintaining a substantially constant blade edge angle and polishing surface. By providing a scale to check the mounting position of, there is an advantage that you can polish while maintaining a constant cutting edge angle and polishing surface regardless of the size of the cutter, making it extremely easy to adjust the blade angle during polishing. This has the effect of eliminating defects such as the cutting performance of the cutter decreasing as the blade edge of the cutter moves to the claw blade in sequence.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a cutter grinder showing the mounting state of the device of the present invention, FIG. 2 is a perspective view of a gauge, FIG. 3 is a partial sectional view of a grindstone, and FIG. FIG. 5 is a cross-sectional perspective view showing the relationship between the cutter shape and the grindstone shape. 3: Bare surface 6: Grinding surface 11: Polisher main body 17: Support shaft 23: Adjusting stand 29a: Gauge mounting stand 37: Motor 60: Base 61: Long hole 63: Pole 65: Positioning member 66: Mark 67: Scale A: Disc cutter B: Rotating whetstone C: Gauge

Claims (1)

[Scope of utility model registration request] 1. A cutter support shaft for rotatably rotatably supporting a disc cutter (A) having a ring-shaped barbed surface (3) which has a cutting edge angle on its outer peripheral edge and is inclined with respect to an axis. 1
7) is supported substantially horizontally on the sander main body (11), and a rotary grindstone (B) having a grinding surface (6) having an annular peripheral surface inclined in a concave shape toward the axis at the outer peripheral edge, The polishing machine main body (1) so that the grinding surface (6) is opposed to the burr surface (3) of the disc cutter (A) so as to be pressed and polished.
1) The cutter supporting shaft (1
7) and the axes are supported substantially parallel to each other on the same horizontal plane, and the burr surface (3) of the disc cutter (A) and the rotary grindstone (B) are supported.
An adjusting table (23) for supporting the movement of the rotating grindstone (B) by sliding the rotating grindstone (B) substantially at right angles to the rotation axes of the both so as to change the position where the grinding surface (6) intersects and contacts. ) Is provided on the polisher body (11), and a gauge (C) indicating the movement adjustment position of the rotary grindstone (B) with respect to the disc cutter (A) is provided on the adjusting base (23). ) A grindstone position adjusting device for a cutter grinder, which is provided so as to be movable and adjustable in a direction substantially horizontal and at right angles to the axis center of FIG.