JPH0437682Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a groove machining tool for forming a groove roller, for example a groove roller around which a wire is wound in a wire cutting device.

[Conventional technology]

The above wire type cutting device is illustrated in FIGS. 6 and 7, for example.
There is a structure shown in the figure. This cutting device 50 is equipped with three rollers 51, 52, 53, and each roller has a large number of annular grooves 51 with a predetermined pitch.
A, 52a, 53a are formed, and a wire S is wound around these and run at high speed to simultaneously cut a large number of wafers of a highly hard and brittle material such as silicon single crystal W. In this case, the pitch of the annular grooves of each roller is extremely small, for example, about 1 mm, and the pitch error of each roller causes a difference in the thickness of the wafer to be cut. For this reason, pitch accuracy is required to be extremely accurate (for example, 0.005
mm). Moreover, the number of annular grooves is large in order to improve cutting efficiency, and therefore, a comb-shaped cutting tool is used as a means of improving efficiency and accuracy during machining.

[Problem that the invention attempts to solve]

The above-mentioned full-form cutting tool has a concentrically shaped unevenness at the tip, and each groove is machined independently, which is time-consuming and requires repeated sharpening due to wear during processing. However, there are problems such as limited grinding and short life. In particular, as described above, it is extremely difficult to individually form a large number of concentric grooves with a pitch of about 1 mm, for example, with the above-mentioned precision.

[Means for solving problems]

In view of the above, the present invention aims to facilitate manufacture and enable long-term use.The present invention is characterized by forming a spiral groove with a predetermined pitch and angle on the outer periphery of the cylindrical body. A notch section formed into an approximately L shape by a radial cut surface and a flank surface orthogonal thereto is cut along the longitudinal direction to form a comb blade over the entire length, and the cut surface connects the center of the main body and the cutting edge. It is designed to form a predetermined rake angle with respect to the line.

[Effect]

The comb blade is formed by forming a spiral groove and cutting a cut surface into the spiral groove. Therefore, pitch accuracy is improved. Furthermore, in the event of wear, the main body is cylindrical, which increases the number of times it can be resharpened, allowing for long-term use.

〔Example〕

1 and 2 show an embodiment of the present invention. Grooving tool 1 has a cylindrical body 2 made of tool steel or the like.
A spiral groove 3 is carved on the outer periphery, and a notch 4 is formed over the entire length. This screw groove 3 has a predetermined pitch P.
and an angle α, and this screw groove 3 has a main body 2
After heat-treating it to the required hardness, it is finished by grinding with a screw grinder to form it precisely. This screw groove 3 is finished with a pitch of 0.9 to 1.5 mm and an angle of 45 to 60 degrees, for example.

The cutout portion 4 is a substantially L-shaped cutout formed by a radial cut surface 5 and a flank surface 6 perpendicular to the cut surface 5.
The cut surface 5 forms a comb blade 7, and the cut surface 5 forms an angle, that is, a rake angle β, with respect to a line connecting the center of the body and the cutting edge.

8 in the figure is a keyway provided in the main body internal hole 2a.

3 to 5 show how to use the grooving tool of the present invention, in which a mounting holder 10 for gripping the tool 1 supports a support shaft 11 passing through a hole 2a in the main body and a support shaft 11 for supporting the support shaft 11. A bracket 12 is provided. The support shaft 11 and the tool 1 are fixed together by a key 13 to prevent rotation of the tool 1, and the support shaft 11 is prevented from rotating relative to the bracket 12 by a clamp member 14.

During cutting, it is preferable that the center of the tool 1 be several mm (5 to 6 mm) higher than the center of the object W to be cut, as shown in FIG. 4, and the cutting edge 7a should be aligned with the center of the object W to be cut.

Note that when the cutting edge is worn out, it is ground along the outer periphery while maintaining a predetermined rake angle β. FIG. 5 is an explanatory diagram showing a state in which the material has been ground many times. The dashed lines in the figure indicate the procedure for sequential grinding.

[Effect of idea]

According to the present invention, a spiral groove having a predetermined pitch and angle is carved on the outer periphery of the cylindrical body, and a cutout portion that is approximately L-shaped with a radial cut surface and a relief surface perpendicular to this is formed along the length of the body. Since the comb blades are formed along the entire length by cutting along the direction, the spiral grooves are formed continuously, compared to conventional comb blade-shaped cutting tools in which the irregularities on the outer periphery are formed concentrically. The pitch accuracy is extremely accurate and long comb blades can be formed. In addition, when cutting, a predetermined rake angle was formed on the cut surface with respect to the line connecting the center of the main body and the cutting edge, and the cut surface was formed along the longitudinal direction, so that the circular grooved roller material could be cut. On the other hand, the comb blades can be processed while being positioned parallel to each other, and comb blades can be formed uniformly over the entire length of the material. In addition, even when the cutting edge wears out, since a spiral groove is formed on the outer periphery of the main body, a comb blade of the same shape can always be obtained by grinding with a predetermined rake angle, which has the effect of extending the period of use.

[Brief explanation of the drawing]

Figures 1 and 2 relate to an embodiment of the present invention, with Figure 1 being a partially cutaway front view, Figure 2 being a left side view of Figure 1, and Figure 3 showing the above tool being attached to a mounting holder. FIG. 4 is an explanatory diagram of the cutting procedure, FIG. 5 is an explanatory diagram of the resharpening procedure, FIGS. 6 and 7 are related to the wire cutting device, and FIG. 6 is a schematic explanatory diagram. , FIG. 7 is a side view. 1 is a groove processing tool, 2 is a cylindrical body, 3 is a screw groove,
4 is a cutting portion, 7 is a comb blade, and β is a rake angle.

Claims (1)

[Scope of utility model registration request] A spiral groove with a predetermined pitch and angle is formed on the outer periphery of the cylindrical body, and a notch is formed into a substantially L shape by a radial notch surface and a relief surface perpendicular to this, and is cut out along the longitudinal direction to extend the entire length. A groove machining tool for a groove roller, which is characterized by forming a comb blade and having a cutting surface forming a predetermined rake angle with respect to a line connecting the center of the body and the cutting edge.