JPS6327928Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a throw-away type milling cutter.

In this type of conventional milling cutter, the second
As shown in the figure, there are chips that have a step b on the rake surface d of the chip presser c from which the chips a are discharged, or are plated. As a result, cutting resistance increased. In the drawing, e is a chip.

The present invention was developed in view of the above circumstances, and its purpose is to reduce the cutting resistance by reducing the contact area between the chips and the rake surface.

Hereinafter, the present invention will be explained with reference to FIG. 4 and subsequent figures.

Reference numeral 1 in the drawings indicates a main body, and a plurality of mounting portions 2 are formed on the outer peripheral surface of the main body 1 at regular intervals in the circumferential direction. These mounting parts 2 are provided with a chip plate 3, a chip 4, and a chip presser foot 5. The chip presser foot 5 is fastened to the main body 1 by a clamp screw 8, and the chip presser foot 5 presses the chip 4. Chip 4 is fixed. Tip presser foot 5
The upper surface thereof is formed into a rake surface 6, and a plurality of grooves 7 are formed on this rake surface 6 along the flow of chips. The width of these grooves 7 is made smaller than the interval between adjacent grooves 7. Note that 9 is a locator.

When the main body 1 is rotated and the tip 4 cuts a workpiece, the chips 10 move along the scoop surface 6, but at this time, since the scoop surface 6 has a plurality of grooves 7, the chips 10 and the scoop surface Since the contact area with 6 is reduced, the cutting resistance is reduced.

When the tip 4 is attached to the attachment portion 2 of the main body 1 as shown in FIGS. 6 and 7 and a scoop surface 6 is formed at the rear of the tip 4, this scoop surface 6
The groove 7 is formed in the groove 7.

As described in detail above, the present invention forms a plurality of grooves 7 along the flow of chips on the rear scoop surface 6 of the chip 4 mounted on the mounting part 2 of the main body 1, and these grooves 7
The width of the grooves 7 is smaller than the interval between adjacent grooves 7.

Therefore, when the chips 10 generated by cutting with the chip 4 move on the rake surface 6, they always slide on the rake surface 6, and the contact area between the chips 10 and the rake surface 6 is reduced by the amount of the plurality of grooves. As a result, chip resistance can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted perspective view of a conventional milling cutter, Fig. 2 is an explanatory view of the same rake surface, Fig. 3 is a sectional view taken along the line shown in Fig. 2, and Fig. 4 is an embodiment of the present invention. FIG. 5 is a sectional view taken along the line of FIG. 4, and FIGS. 6 and 7 are plan views of essential parts of other embodiments of the present invention. 1 is the main body, 4 is the tip, 6 is the scoop surface, and 7 is the groove.

Claims (1)

[Scope of utility model registration request] A plurality of grooves 7 are formed along the flow of chips on the rear scoop surface 6 of the chip 4 attached to the attachment part 2 of the main body 1, and the width of these grooves 7 is made smaller than the interval between adjacent grooves 7. Characteristic fly cutter.