JPS637494Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention enables
This invention relates to a woodworking knife polisher that can perform rough sharpening and finishing sharpening at different angles.

Conventionally, a blade supported by a blade holder and rough and finishing whetstones for polishing the blade are provided correspondingly.
A woodworking knife polishing machine in which one of the blades is reciprocated by a reciprocating means to perform rough sharpening and finishing sharpening of the cutter by means of a whetstone is known from Japanese Patent Laid-Open No. 139863/1983.

However, as is clear from the description in Figures 2 and 3 of the drawings, in this case, the rough whetstone and finishing whetstone are arranged so that their horizontal center lines coincide with the center of the width of the part to be ground of the blade. Therefore, as shown in Figure 10A of the drawing, the blade surface of the knife is ground with a rough whetstone to completely remove any chips etc. from the cutting edge.
In order to sharpen the tip of the cutting edge slightly using a cup-shaped finishing whetstone as shown in Figure B,
As is clear from the descriptions in Figure 10A and B, the supporting angle of the blade must be changed for rough sharpening and for finishing sharpening, which makes the operation cumbersome and reduces work efficiency. When adjusting the sharpening angle by changing the support angle, there is a problem in that a slight angle error occurs each time the adjustment is made, resulting in variations in the sharpening angle.

Therefore, the present invention provides a woodworking knife polishing machine that solves the above-described conventional problems by slightly different inclination angles of the rough whetstone and the finishing whetstone with respect to the surface to be ground of the cutter.

Next, an example of the implementation of the woodworking knife polishing machine according to the present invention will be described below with reference to the drawings.

In FIG. 1 of the drawings, reference numeral 1 denotes the body of a polishing machine, in which a carriage 3 is engaged on a sliding surface 2, and a cutter holder 6 with a spindle 5 supported by a support 4 is provided on the carriage 3. The cutter 7 is fixed to the cutter holder 6 using an electromagnet 8 or a presser (not shown in the drawings).

Reference numerals 9 and 10 denote a rough whetstone and a finishing whetstone disposed above the knife holder 6, and the rough whetstone 9 is the finishing whetstone 1.
The cup-shaped motor shown in FIG. As _shown in FIG.
The blade sharpening angle α ₂ is obtained as follows.

b is an inclination angle setting means for the holder 6 provided at one end of the blade holder 6, which engages a worm wheel 15 fixed to the spindle 5 of the blade holder 6 with a worm 17 rotated by the handle 16,
By the operation 6, the cutting edge of the knife 7 supporting the knife holder 6 is adjusted so as to contact the polishing portions of the grindstones 9 and 10 at a desired angle.

18 and 19 raise and lower the holders 13 and 14 of the grinding wheels 9 and 10 along guides 20 and 21;
It is a feeding means for causing the grindstones 9 and 10 to cut into the cutter 7, and in the automatic case, a motor shown in FIG. 1 is used, and in the manual case, a handle (not shown in the drawings) is used.

Reference numeral 22 denotes a reciprocating means linked to the carriage 3, which may include a pinion rack or the like driven by a motor 23, and the pinion rack 22 may be rotated by a manual handle.

Next, the effects of the woodworking knife polisher according to the present invention will be explained.

When using a cup-shaped rough whetstone 9 and a finishing whetstone 10 as shown in Figure 2 of the drawing, the rough whetstone 9 is attached to the surface to be ground of the cutter 7 at a sharpening angle α ₁ as shown in Figure 3. Correspondingly, a motor 1 drives a rough whetstone 9 so that the finishing whetstone 10 corresponds to the surface to be ground of the cutter 7 at a sharpening angle _α2 .
1 and the motor 12 that drives the finishing whetstone 10 are attached to the holders 13 and 14 so that the axis of the motor 11 is inclined toward the blade base by θ from the axis of the motor 12. When polishing the blade 7, first send the rough whetstone 9 to the blade 7 to roughly sharpen the blade edge, then pull up the rough whetstone 9 and send the finishing whetstone 10 to the blade 7 to finish sharpen the blade edge. , while holding the knife 7 at a constant angle, roughly sharpen the knife 7 at α ₁
Finishing sharpening can be done easily and reliably at an angle of α ₂ .

As mentioned above, the woodworking knife polishing machine according to the present invention uses a rough whetstone and a finishing whetstone, which are placed opposite each other on a cutter held at a predetermined angle by a cutter holder, so that the rough whetstone is tilted toward the base of the cutter. The angle of the finishing whetstone is set smaller than the angle of inclination towards the cutting edge of the cutting tool, so just by keeping the cutting tool fixed and cutting between the rough and finishing whetstones, the cutting tool will Not only is it possible to easily and efficiently perform rough sharpening and finishing sharpening at different angles to achieve the ideal blade sharpening, but it is also possible to easily and efficiently perform rough sharpening and finishing sharpening at different angles. When setting the sharpening angle with , the angles of rough sharpening and finishing sharpening are always the same and there is no variation, and even when changing the blade edge angle by adjusting the inclination of the knife holder, the rough sharpening This has the unique effect of keeping the difference in angle between finishing and finishing sharpening constant.

[Brief explanation of drawings]

FIG. 1 is a front view of a woodworking knife polishing machine according to the present invention using a cup-shaped rough whetstone and a cup-shaped finishing whetstone. Figure 2 is a side view of the same as above. FIG. 3 is an explanatory diagram showing the settings of the sharpening angles of the rough whetstone and the finishing whetstone. In the figure, 6 is a holder for the knife 7, 9 is a rough whetstone, and 10
1 is a finishing whetstone, and 13 and 14 are holders for the whetstones 9 and 10.

Claims (1)

[Scope of utility model registration request] A cutter supported by a cutter holder and rough and finish whetstones for polishing the cutter are provided correspondingly, and one of them is reciprocated by a reciprocating means so that the cutter is roughly sharpened and finished sharpened by the whetstone. A woodworking knife polishing machine characterized in that the inclination angle of the rough whetstone towards the blade base of the cutter is set smaller than the inclination angle towards the blade base of the finishing whetstone. .