JP2008018491A - Side cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side cutter excellent in cutting balance and excellent in discharging performance of chips. <P>SOLUTION: This side cutter is furnished with a plurality of outer peripheral blades making roughly a disc shape and projected from an outer peripheral surface of a tool main body to be rotated around its axis. The outer peripheral blades are symmetrically formed against a flat surface dividing the side cutter into two in the cross direction, and it is favorable to form the outer peripheral blades in any of a protruded angle shape, a recessed trough shape, a protruded curved shape, and a recessed curved shape. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a side cutter, and more particularly to a side cutter for machining or cutting a groove in a work material.

Conventionally, as this type of side cutter, a plurality of throwaway tips having a positive axial rake angle with respect to one reference end surface of the tool body on the outer periphery of the tool body of a large-diameter disc, and a negative 2. Description of the Related Art A plurality of throwaway tips with an axial rake angle are mounted alternately at equal intervals in the circumferential direction. Furthermore, some of the radial rake angles of the throwaway tips are set to be different from the radial rake angles of other throwaway tips (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 63-105813 (FIG. 1)

However, since the side cutter described in Patent Document 1 is mounted alternately at equal intervals in the circumferential direction of the tool body, the cutting resistance acting in the width direction of the side cutter becomes unbalanced. In the worst case, chatter vibration occurs during grooving, and the corner portion of the chip is lost.
In addition, since the throw-away tip has a negative axial rake angle −θ1, if the chips extend for a long time, they may rub against both wall surfaces of the processing groove to deteriorate the surface roughness, or the chips cannot be discharged. There was a risk.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a side cutter that is excellent in cutting balance and excellent in chip discharging performance.

In order to solve the above-mentioned problem, the invention according to claim 1 is a side cutter comprising a plurality of outer peripheral blades that are formed in a substantially disk shape and project from an outer peripheral surface of a tool body that is rotated around an axis thereof. The outer peripheral blade is formed symmetrically with respect to a plane that bisects the side cutter in the width direction.
According to the side cutter of claim 1, since the outer peripheral blade is formed symmetrically with respect to the plane that bisects the side cutter in the width direction, it has excellent cutting balance during cutting, and chatter and this chatter. This prevents the occurrence of a peripheral blade defect.

The invention according to claim 2 is the invention according to claim 1, wherein the outer peripheral blade is any one of a convex chevron shape, a concave valley shape, a convex curve shape, or a concave curve shape in the tool rotation direction. Features.
According to the second aspect of the present invention, since the outer peripheral edge is any one of a convex chevron shape, a concave valley shape, a convex curve shape, or a concave curve shape in the tool rotation direction, As a result, the side cutter is prevented from being shaken in the width direction. Furthermore, since the chips are generated following the chevron shape or the valley shape, it is prevented from rubbing on both wall surfaces of the groove without being swung left and right.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the side blade intersecting with the outer peripheral blade located on the both end surfaces of the tool body has a linear shape or a curved shape substantially orthogonal to the axis. A secondary cutting edge is provided.
According to the third aspect of the present invention, the side blade that cuts the wall surface of the machining groove is provided with the sub-cutting blade substantially orthogonal to the axis of the side cutter, so that the surface roughness and dimensional accuracy of the wall surface are further increased. Good.

The side cutter of the present invention is excellent in the cutting balance during cutting as described above, and has an effect of preventing the occurrence of chatter and the loss of the outer peripheral edge due to the chatter.

Below, the side cutter which concerns on the 1st Embodiment of this invention is demonstrated, referring FIGS. 1-3. FIG. 1 is a partial front view of the side cutter. FIG. 2 is a partial plan view of the side cutter. FIG. 3 is a partial longitudinal sectional view of the side cutter.

As shown in FIGS. 1 to 3, the side cutter 1 according to the present embodiment has a substantially disk shape, and includes a plurality of outer peripheral blades 11, 21 on the outer peripheral surface of the tool body 2 that is rotated around its axis. The chips 10 and 20 are detachably mounted by the tightening screws 4 through the mounting holes. The chips 10 and 20 are appropriately selected from hard materials such as cemented carbide, cermet, and ceramics. The chips 10 and 20 are configured by an end surface side chip 20 disposed on both end surface sides of the tool body 2 and an intermediate chip 10 disposed in a center portion in the width direction of the tool body 2. The end face side chip 20 and the intermediate chip 10 have a substantially rectangular plate shape, and one side surface thereof is rake faces 12 and 22 facing the tool rotation direction K. Outer peripheral blades 11 and 21 projecting from the outer peripheral surface of the main body 2 are formed. The adjacent intermediate tip 10 and each end surface side tip 20 are arranged so that the rotation trajectories around the axis of each outer peripheral blade 11, 21 partially overlap and are continuous over the blade width W of the side cutter 1. Yes. In each end face side tip 20, a side blade 24 that protrudes from the end face of the tool body 2 is formed at a side ridge portion that intersects with the outer peripheral blade 21 with an arcuate corner 27 interposed therebetween.

Each end face side tip 20 and the intermediate blade tip 10 are attached to the tool body 2 directly or via a cartridge 30 as shown in FIGS. The cartridge 30 is inserted into the cartridge mounting groove 3 provided on the outer peripheral surface of the tool main body 2, and the tightening bolt 6 screwed into the tool main body 2 via the mounting hole of the cartridge 30 and the tool 30 rotating direction of the cartridge 30. It is fixed by at least one of the wedge members 40 provided on the K side. Further, a convex portion extending in the radial direction of the side cutter 1 is provided on the side surface facing the back side of the tool rotation direction K of each cartridge 30, and on the wall surface facing the front side of the tool rotation direction K of the corresponding cartridge mounting groove 3. A concave portion that engages with the convex portion is provided, and by engaging the convex portion and the concave portion, each cartridge 30 is positioned in the width direction of the side cutter 1 and is prevented from moving.

As can be seen from FIG. 2, each of the end face side chips 20 and the outer peripheral blades 11 and 21 of the intermediate chip 10 are formed symmetrically with respect to a plane that bisects the side cutter 1 in the width direction. The cutter 1 has excellent cutting balance and is not shaken in the width direction when grooving a work material, so that chatter and the loss of the outer peripheral blade due to the chatter can be prevented.

Further, the outer peripheral edge 11 provided in the intermediate tip 10 is a chevron shape that is symmetric with respect to a plane that bisects the side cutter 1 in the width direction and that is convex toward the front side in the tool rotation direction K, and is formed in a straight line It is said that. Therefore, the work material gradually bites from the leading edge of the chevron shape to both end sides, so that the work material is bitten well and the side cutter 1 can be prevented from being swung in the width direction. Further, even if the chips generated following the chevron shape are not shaken in the width direction, it is possible to avoid scratching and scratching both wall surfaces of the machining groove. In addition, the outer peripheral blade 11 provided in the intermediate tip 10 has a valley shape that is symmetrical with respect to a plane that bisects the side cutter 1 in the width direction and that is concave with respect to the tool rotation direction and is configured by a straight line. Even in this case, since the work material gradually bites from both end portions of the outer peripheral blade 11 to the central valley bottom, the biting of the work material is improved and the side cutter 1 is swung in the width direction. Can be prevented. Furthermore, even if the chips generated following the valley shape are not shaken in the width direction, it is possible to avoid scratching and scratching both wall surfaces of the machining groove.

Further, the outer peripheral blade 21 provided on each end face side tip 20 mounted symmetrically on the one end face and the other end face side of the tool body 2 in the width direction of the side cutter 1 as it goes from the end to the center side. The tool rotation direction K is inclined with respect to the axis so as to be directed toward the back side, so that the work material gradually bites from the end portion toward the center side, so that the biting of the work material becomes good. At the same time, since the outer peripheral blades 21 simultaneously bite the work material, the side cutter 1 can be prevented from being swung in the width direction. Furthermore, since the chips generated from the outer peripheral edge 21 flow away from the wall surface of the machining groove, it is possible to avoid scratching and scratching the wall surface of the machining groove.

Furthermore, the side cutting edge 24 of each end face side chip 20 may be provided with a secondary cutting edge 25 having a linear shape or a curved shape substantially orthogonal to the axis. When such a secondary cutting edge 25 is provided, both wall surfaces of the machining groove are smoothed, so that the surface roughness and dimensional accuracy of both wall surfaces are greatly improved. It should be noted that at least one end face side chip 20 provided with the auxiliary cutting edge 25 may be attached to each end face side of the tool body 2.

In the present side cutter 1, if the outer peripheral blade arranged over the blade width W has a symmetrical shape with respect to a plane that bisects the side cutter 1 in the width direction, only the intermediate tip 10 is used. It is good also as an aspect using only the aspect or the said end surface side chip | tip 20. FIG.

  4 and 5 show a modification of the outer peripheral blade provided in the intermediate tip in the side cutter according to the present embodiment. 4 and 5 are partial plan views of the modified example. As shown in the drawing, in this modification, the outer peripheral blade 11 provided in the intermediate tip 10 is formed in a convex curve shape or a concave curve shape, and even in such a case, the biting property to the work material is obtained. There is an effect such as improvement of chips and improvement of chip discharge.

Next, a side cutter according to another second embodiment will be described with reference to FIGS. FIG. 6 is a partial front view of the side cutter according to the present embodiment. FIG. 7 is a partial plan view of the side cutter. FIG. 8 is a partial longitudinal sectional view of the side cutter. 6 to 8, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As can be seen from FIG. 7, the side cutter 1 is suitable for machining a groove wider than the first embodiment by arranging two intermediate chips 10 in parallel and adjacent in the width direction of the side cutter 1. . As in the first embodiment, the outer peripheral blade 11 provided in each intermediate tip 10 has a convex chevron shape toward the tool rotation direction K, and is a plane that bisects the width direction of the side cutter 1. It is formed substantially symmetrically. The configuration of the end face side chip 20 is substantially the same as that of the first embodiment.

In addition to the effects described in the first embodiment, the side cutter 1 having the above-described configuration compares the width of each chip generated from a pair of adjacent and adjacent intermediate blade tips 10 with the width of the machining groove. In order to prevent the chips generated from the respective intermediate chips from being entangled with each other, the chip discharge performance is prevented from deteriorating.

A pair of intermediate chips 10 arranged in parallel and adjacent to each other are arranged in close contact with each other or slightly spaced from each other, but the outer peripheral blades 11 provided in these intermediate chips 10 cannot overlap each other. There is a region where the outer peripheral edge 11 is missing. Therefore, in order to eliminate the region lacking the outer peripheral edge 11, the two sets of intermediate chips 10 spaced apart in the circumferential direction are arranged with a relative shift in the width direction by Wr, as can be seen from FIGS. It is desirable. In this case, the regions lacking the outer peripheral edge 11 present in each set of intermediate tips 10 can be supplemented with each other. The outer peripheral blade 11 formed by each set of intermediate tips 10 is not completely symmetrical with respect to a plane that bisects the width direction of the side cutter 1, but the outer peripheral blade formed by one set of intermediate blades. If the shift amount Wr is kept very small with respect to the entire length of 11, the cutting balance is hardly adversely affected.

It is a partial front view of the side cutter which concerns on 1st Embodiment. It is a partial top view of the side cutter. It is a partial longitudinal cross-sectional view of the same side cutter. It is a partial top view explaining the modification of the side cutter. It is a partial top view explaining the modification of the side cutter. It is a partial front view of the side cutter which concerns on 2nd Embodiment. It is a partial top view of the side cutter. It is a partial longitudinal cross-sectional view of the same side cutter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side cutter 2 Tool main body 10 Intermediate | middle tip 20 End surface side tip 11, 21 Peripheral blade 12, 22 Rake surface 13, 23 Peripheral flank 24 Side blade 25 Secondary cutting blade 26 Side flank 27 Corner

Claims (3)

In a side cutter comprising a plurality of outer peripheral blades that form a substantially disk shape and project from the outer peripheral surface of the tool body that is rotated around its axis,
A side cutter characterized in that the outer peripheral blade is formed substantially symmetrically with respect to a plane that bisects the side cutter in the width direction. 2. The side cutter according to claim 1, wherein the outer peripheral blade has a convex chevron shape, a concave valley shape, a convex curve shape, or a concave curve shape in the tool rotation direction. The side blade intersecting with the outer peripheral blade located on both end faces of the tool body is provided with a secondary cutting blade having a linear shape or a curved shape substantially orthogonal to the axis. Side cutter.

Images