JPS60232811A - Inserted cutting tool - Google Patents

Abstract

PURPOSE:To improve the accuracy of a cut surface by providing on a tool body a plurality of tips inclined a certain angle to the rotary center axis and arranging them on the circumference centering around the rotary center of the tool body to form cutting edge of the tip. CONSTITUTION:Tips 11 are provided on the outer peripheral surface of a tool body 1 such that they are inclined to the rotary center axis 2 of said body by theta1. The tip 11 slantly mounted on the outer peripheral surface of said body 1 is shaped such that the cutting edge portions 12 provide a mountain-like curve along a circumference concentric with the outer peripheral surface. An angle theta3 between the tip 11 and a band plate 01 is made about 90 deg. and the tips 11 are rotatably driven while being inclined by theta2 to the direction of feeding the band plate 01 for cutting.

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates to improvements in cutting tools with implanted blades.

Strip processing equipment such as a steel plate rolling line is equipped with a trimming process in which both ends of the strip are cut in order to make the width of the strip constant.

Conventionally, the cutting (edge milling) of both side ends of the strip plate is often performed by cutting using a cutting tool (milling cutter).

Figure 1 shows the working concept of conventional edge milling, Figure 2
Figure (al is the side surface showing the cross section of the cutting blade installed state in Figure 1,
FIG. 2(b) is a partial top view showing the state in which the cutting blade in FIG. 1 is attached.

A plurality of rectangular chips 3 are provided on the outer peripheral surface of the tool body 1 and are inclined at an angle of θ with respect to the rotational center axis 2. It is installed at an angle of θ in the direction of travel. At this time, chip 3
θ is set so that the angle θ3 formed by the band plate 01 and the band plate 01 is about 90°.

The cutter 4 described above is provided at both ends of the strip plate 01, and the cutter 4 is provided at both ends of the strip plate 01
The side edge is cut by rotationally driving the plate in the direction of sheet passing. In this case, the rotation center axis of the cutter 4 is θ with respect to the strip plate 01,
Since the tip 3 is inclined, the tip 3 comes into contact with the strip plate 01 in the longitudinal direction (vertical direction in the figure), and uneven wear of the tip 3 does not occur. In addition, because the strip plate 01 has a pull-cut deer, less cutting is required, and the surface quality is good.Moreover, since cutting is performed in the threading direction where the strip plate has the highest rigidity, the bending of the strip plate 01 is reduced. However, since the cutter 4 described above has a rectangular tip 3 inclined to the tool body 1, the distance from the end a of the tip 3 to the rotation center axis 2 is almost zero. Since the dimension from the center of the cutting block 3 to the rotational center axis 2 is shorter, the cut surface has a disadvantage that the shape is not flat.

To solve the above drawbacks, the tip must be made into a spiral shape, but if the tip is made into a spiral shape, the shape of the tip will be complicated, and the shape of the tool body will also be complicated, and the tip and tool body will not fit together. Therefore, compared to a rectangular tip (in the case of a rectangular tip, cutting can be performed with four cutting edges), the amount that can be cut with one tip is small, and the running cost is extremely high, making it impractical.

The present invention has been made in view of the above-mentioned situation, and provides an implanted cutting tool that is easy to manufacture, has four cutting edges that can be used for cutting, and is equipped with a tip so that the surface to be cut is flat. The purpose is to improve the precision of the machined surface without increasing the initial cost and running cost.

The structure of the present invention that achieves this object includes providing a large number of chips on the tool body at a constant angle with respect to the rotation center axis,
The cutting edge portion of the tip is formed to coincide with a circumference centered on the rotation center of the tool body.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the implanted cutting tool according to the present invention will be described in detail below with reference to the drawings.

Fig. 3 is a concept of work using a cutting tool with a cutting edge according to an embodiment of the present invention, Fig. 3(a) is a side view thereof, and Fig. 3(b) is a working concept.
7. is the top surface, Figure 4 is the middle part of Figure 3, and 7.・FIG. 4(a) shows a partially cross-sectional side view of the installed state, and FIG. 4(bl is a top view of the part).

Components that are the same as conventional ones are given the same symbols.

A tip 11 is provided on the outer peripheral surface of the tool body 1 and is inclined by θ1 with respect to the rotation center axis 2.

The shape of the tip 11 is such that when it is installed obliquely on the outer circumferential surface of the tool body 1, the cutting edge 12 becomes a chevron-shaped curved line along the circumference of the same center as the outer circumferential surface. Two cutting edges 1
It has 2. It is the same as the heart.

The cutting of the side edge of the strip plate 01 by the cutter 13 equipped with this tip 11 is similar to the cutting by the conventional cutter 4 equipped with the rectangular cutting blade 3, and the angle θ between the tip 7° 11 and the strip plate 01 is approximately Cutting is performed by tilting θ2 at 90° in the sheet passing direction of Shinhan 01 and driving it rotationally.

In this case, the dimensions from the end a of the chip 11 to the rotational center axis 2, and the dimension from the center of the chip 11 to the rotational center axis 2'
! ! Since the dimensions are the same, the shape of the cut surface is always flat. Moreover, like the conventional cutter 4, uneven wear of the tip 11 does not occur, the number of cuts of the strip plate 01 is reduced, and the surface quality is good. Further, since there are four cutting edges 12 like the rectangular tip 3, there is no difference in running cost between the tip 3 and the tip 11, and there is no risk of tool breakage due to chatter.

Although the above-mentioned embodiment is used for cutting the side edges of a strip plate, it is of course possible to use it for cutting other than the strip plate.

As described above in detail based on one embodiment, according to the implanted cutting tool according to the present invention, in order to make the cut surface flat,
It is possible to improve the precision of the machined surface without increasing the initial cost and running cost by using a tip that is easy to manufacture and has the same ability as a rectangular tip instead of using a spiral tip that is difficult to manufacture.

[Brief explanation of drawings]

Figure 1 is a working conceptual diagram showing a conventional edge milling ring, Figure 2 (a) is a side view showing the cross section of the +y and 70 installed states in Figure 1, and Figure 2 (b) is a cross-sectional view showing the installation state of +y and 70 in Figure 1. FIG. 3 is a conceptual diagram of work performed by a cutting tool with a grafted blade according to an embodiment of the present invention, FIG. 3(a) is a side view thereof, and FIG. 3(b) is a partial top view showing the state. Its top view, FIG. 4 is a view of the +y7o attached state in FIG. 3, FIG. In the drawing, 1 is the tool body, 2 is the rotation center axis, 11 is the tip, 12 is the cutting edge, 13 is the canter, 01 is the strip, and θ is the inclination angle of the cutting blade. Patent Applicant: Mitsubishi Heavy Industries, Ltd. Sub-Agent Patent Attorney: Shibu Mitsuishi (and 1 other person) Figure 1 Figure 2 (a) (b) Figure 3 (0) (b) 12 □ Figure 4 (a) (b)

Claims (1)

[Claims] A tool body is provided with a large number of chips inclined at a constant angle with respect to the rotation center axis, and the cutting edge portions of the chips are formed so as to coincide with a circumference centered on the rotation center of the tool body. Ukeblade cutting tool.