JPS5835817B2 - How to grind saw teeth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for grinding saw teeth used in automatic sharpening machines such as band saws.

Conventionally, a disc-shaped bit grindstone or a regisoid grindstone has been used for grinding saw teeth in an automatic sharpening machine.

However, these grinding wheels are prone to wear, and the contact area with the saw teeth is small, which makes the wear even more severe.

Therefore, it is necessary to frequently perform dressing for reshaping, and there are also problems in finishing accuracy.

In view of the above, an object of the present invention is to reduce wear of the grinding wheel.
Moreover, the object of the present invention is to provide a method that can perform uniform and highly accurate grinding.

Next, the present invention will be explained based on embodiments shown in the drawings.

The bowl whetstone 1 shown in Fig. 1 has a spindle hole 2 for mounting a sharpening machine, and as shown in Fig. A body 8 is attached.

In addition, in FIG. 3, the angle X formed between the outer circumferential surface 4 and the bottom surface 5 of the separation body 3 is the angle between the throat angle line 1-A of each of the teeth 7 to 7 of the bandsaw 6 shown in FIG. It is equal to the angle y formed with B-B, and the tip portion 8 between the outer circumferential surface 4 and the bottom surface 5 has a shape similar to the tooth bottoms 9 to 9.

Next, the process of grinding the teeth 7 to 7 of the band saw 6 using the bowl grindstone 1 will be explained according to FIG.

Here, the bowl whetstone 1 is connected to a rotating shaft (not shown) of a sharpening machine through a spindle hole 2.

) The center line O-0 of this rotating shaft is perpendicular to the line B-B of the bandsaw teeth 7 to 7 throughout the entire process, that is, the bottom surface 5 of the bowl whetstone 1 and the line B-B are parallel. It is in a state of

FIG. 4A shows the state before the start of grinding. From this state, the bowl grinding stone 1 is lowered and moved to the right, and as shown in FIG. Grinding is performed by moving to the right along the throat angle line A-A while making contact with the throat 10 of the tooth.

Next, as shown in FIG. 5C, the tip 8 of the bowl whetstone 1 is moved along the shape of the bottom 9 of the sawtooth 7 to perform grinding.

After that, move the band saw 6 to the right and use the bowl whetstone 1.
Grinding is carried out by moving upward while bringing the bottom surface 5 of the blade into contact with the blade 11 of the saw tooth 7.

(See Fig. 5 2) When the grinding of the annuity 11 is completed (see Fig. 5), the bowl whetstone 1 is raised as shown in Fig. 5,
Move further to the left and return to the state shown in Figure 5A.

Next, the band saw 6 is moved to the right by one pitch.

By repeating the above steps, the saw teeth 7 to 7 are ground one after another.

In addition, in the above embodiment, it is also possible to use other cemented carbide abrasive grains, such as borazone, as the diamond of the separation body 3,
In addition, the type of the grindstone is not limited to the comb type as in the above embodiment.
Any type of grindstone may be used as long as it has a detached body having the same shape and configuration as the detached body 3.

As is clear from the above description, the present invention allows the angle between the outer circumferential surface and the bottom surface of the separated body, which is mainly made of carbide abrasive grains such as diamond, to be the throat angle line and the expenditure line of the saw tooth to be ground. By moving a comb-shaped grindstone or the like formed by an angle equal to the angle formed by following the tooth throat angle line and the expenditure line while holding the bottom surface of the separation body parallel to the expenditure line of the sawtooth, By sequentially grinding the saw teeth, the grinding work can be performed only by relative parallel movement between the bowl whetstone and the saw teeth, thereby simplifying the control and structure of the sharpening machine.

Furthermore, in grinding, the part of the bowl whetstone that corresponds to the shape of the part to be ground of the saw tooth is held by the holder, so the effective range of grinding of the part is wide and the strength is large, and the carbide grinder Combined with the use of grains, it is possible to prevent local or rapid abrasion of the detachment, and it is possible to extend the life of the grinding wheel.

Furthermore, for these reasons, it is possible to slowly grind the tooth throat and root of the sawtooth, and it is also possible to grind the tooth line without difficulty, resulting in uniform and highly accurate incisors. be able to.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is a perspective view of a bowl whetstone;
Figure 2 is a sectional view taken along the line ■-■ in Figure 1, Figure 3 is a partially enlarged view of Figure 2, Figure 4 is a partial view of a band saw, and Figure 5 is a diagram of the grinding process using a bowl whetstone. be. 1... Bowl whetstone, 3... Separation, 4...
...Outer surface, 5...Bottom surface, 6...Band saw, 7-7...Sawtooth, 8...Tip,
9...Tooth base, 10...Tooth throat, 11...
...annual expenses, A-A...dental throat angle line, B-B.
・・・・・・Annual expenses line.

Claims (1)

[Claims] 1. A grinding wheel such as a bowl-shaped grindstone in which the angle between the outer peripheral surface and the bottom surface of a detached body mainly made of carbide abrasive grains such as diamond is equal to the angle between the tooth throat angle line and the annual line of the saw tooth to be ground. , while keeping the layer surface of the separated body and the expenditure line of the sawtooth parallel to each other,
A sawtooth grinding method, characterized in that the sawtooth is sequentially ground by moving the sawtooth along the tooth throat angle line and the expenditure line.