JPH07276129A - Finishing blade tip and face milling cutter incorporating this finishing blade tip - Google Patents

Abstract

PURPOSE:To improve finished surface rigidity by forming an inclined curved surface making a band shape so that a flat drag ridge of a large curvature radius is formed roughly in the center of an inclined side surface on the side of a rake face of an inclined surface. CONSTITUTION:A belt type inclined curved surface 3 having a large curvature radius R is formed on the side of a rake face of a flat inclined side surface 2. Consequently, a flat drag ridge 5 of a large curvature radius R is formed roughly in the center of the inclined side surface 2. This inclined curved surface 3 and the inclined side surface 2 form a primary clearance angle alpha, a secondary clearance angle alpha and band width C respectively against the rake face by having inclination alpha, beta. This secondary clearance angle beta is normally 5 deg.-30 deg., and the primary clearance angle alpha is smaller than a value of this secondary clearance angle beta. Additionally the curvature radius R of this inclined curved surface 3 is set in a range of R=80-2000mm.

Description

Description: TECHNICAL FIELD The present invention relates to a finishing blade tip and a face mill incorporating the finishing blade tip of the tip, and particularly, the finishing blade has a good cutting edge configuration and a good mounting configuration. It was made to become.

 (Prior Art) Conventionally, as a finishing blade tip of this type, as disclosed in French Patent No. 2164302, by making the rake face side a conical surface, the cutting edge has an arc shape. It is known that it has become a flat blade. It is also known that the entire side surface of the chip is curved.

 (Problems to be solved by the invention) However, in the above-mentioned conical surface finish blade tip, since the rake angle is reduced by the full cone angle, there are problems such as increased cutting resistance, chipped edges, and burrs. There was a point. On the other hand, in the case where the entire side surface of the chip is curved, the mounting accuracy was poor when it was mounted on the face mill, and there was the problem that the chip moved due to cutting resistance.

 In view of the above, the present invention provides a finishing blade tip having an improved cutting edge configuration and mounting configuration, and a face milling cutter into which the finishing blade tip is incorporated.

 (Means for Solving Problems) The present invention has been made in view of the above-mentioned points, and an indexable positive lens having an inclined angle β of 5 ° to 30 ° by a flat inclined side surface. This is an improvement on the premise of the type of finishing blade tip.

 That is, on the rake face side of the inclined side surface, a belt-shaped inclined curved surface is formed so that a flat blade edge having a large radius of curvature is formed at approximately the center of the inclined side surface. The radius of curvature R of the inclined curved surface is set within the range of R = 80 to 2000 mm, and the primary angle smaller than this is set for the inclination angle β constituting the secondary clearance angle. It is designed to form the clearance angle α. Further, the above-mentioned flat blade edge includes those which are separately located on both sides of the straight blade edge.

 Further, in a face milling machine in which these finishing blade tips are incorporated, the inclined side surfaces are incorporated so as to serve as positioning surfaces.

 (Function) Since the finishing blade tip of the present invention is based on the positive type chip, it has good sharpness when assembled in a face mill and has a smooth blade configuration with a large radius of curvature for finishing. The surface roughness is good.

 Furthermore, when incorporated in a face mill, the inclined side surfaces form the positioning surface, which improves stability during clamping.

 (Example) Hereinafter, an example of a face mill incorporating the finished blade tip of the present invention and the finished blade tip of this chip will be described with reference to the drawings.

 In Figures 1 to 3, (1) is a positive-type finishing blade tip in the shape of a substantially square plate, and a large radius of curvature R is provided on the rake face side of the flat inclined side face (2). A strip-shaped inclined curved surface (3) having a is formed. In this case, the inclined curved surface (3) and the inclined side surface (2) have the inclination angles α and β, so that the primary clearance angle α and the secondary clearance angle β and the strip width C with respect to the rake face. Configure each. The secondary clearance angle β is usually 5 ° to 30 °, and the primary clearance angle α is smaller than this value.

Further, a nose relief surface (4) having a nose radius R is interposed between these inclined side surfaces (2) in the case shown.

 Then, the inclined curved surface (3) constitutes a radius of curvature R as clearly shown in FIGS. 3 and 4, and the radius of curvature R is set within a range of R = 80 to 2000 mm. To be done. This is because when the radius of curvature R is less than 80 mm, there is no effect in terms of surface roughness, and when it exceeds 2000 mm, it is not necessary any more when considering the existence of processing machines.

 The center point O of the radius of curvature is preferably 0 to 0.4H as the eccentricity amount δ when the maximum width H of the inclined side surface (2) is used as a reference. It is better to provide an eccentricity to avoid wear interference of the next cutting edge (5) when there are too many cuts.

 Further, the inclination width of the inclined curved surface (3) is shown by the minimum width C in FIG. 2, but is usually in the range of 0 to 3 mm.

 5 to 7 show a finishing blade tip (11) having a hexagonal tip as a basic shape, and a flank forming the flank has an inclined side surface (2) and a belt-shaped inclined curved surface (3). And a nose flank (4) are respectively formed.

 In the finishing blade tip (21) shown in FIGS. 8 and 9, the above-mentioned inclined curved surface (3) exists separately on both sides. Therefore, the straight blade edge (6) formed by the inclined side surface (2) and the rake surface remains in the center with the central width D, and the flat blade edge (5) is formed on both sides thereof.

 FIGS. 10 to 12 show a face mill (30) incorporating the finishing blade tip (1) shown in FIGS. 1 and 2 mentioned above, and all or one of the cutting edge tips. About 5 sheets or so are assembled in the mounting groove (32) of the cutter body (31). In this case the attachment is by means of a rear wedge (34) provided with screws (33).

 FIG. 13 is a face mill (40) incorporating the finishing blade tip (11) shown in FIGS. 5 and 6.

 Further, FIG. 14 shows a face milling cutter (50) in which a finishing blade tip (1) having a central mounting hole (7) is mounted, for example, in a four-blade type, and in the mounting groove (51), The cartridge (52) is provided with an adjusting wedge (53) and an adjusting screw (54) so that the position of the cartridge can be adjusted in the axial direction.

 Further, the face milling cutter (60) shown in FIG. 15 is configured such that a small number of finishing blade chips (1) are incorporated into a plurality of normal chips (61). In this case, the tip (61) would normally be received in the tip seat (63) of the locator (62) and attached by a front wedge (65) with a screw (64).

 When mounting these finishing blade tips (1) (11) (21), as shown in FIGS. 16 and 17, the inclined side surface (2) of the cutting edge tip (1) (11) (21) is attached to the cartridge carriage (52) or It serves as a positioning surface for the side wall of the chip seat provided in the cutter body (31).

 (Effect of the invention) As described above, the present invention provides a finishing blade tip in which the cutting edge configuration of the flat blade edge (5) is improved. It has the advantage that roughness can be expected to improve.

[Brief description of drawings]

 FIG. 1 is a plan view showing an embodiment of the finishing blade tip of the present invention, FIG. 2 is a front view, FIG. 3 is a partial sectional view taken along line III-III, and FIG. Is a perspective view, FIG. 5 is a plan view showing a modification of the finishing blade tip, FIG. 6 is a front view, FIG. 7 is a perspective view, and FIG. 8 is another example of the finishing blade tip. FIG. 9 is a plan view, FIG. 9 is a front view, FIG. 10 is a partial front view showing a right-side milling cutter of the present invention, FIG. 11 is its plan view, FIG. 12 is a sectional view, and FIG. Figures and 14 are cross-sectional views showing a modified example, Fig. 15 is a partial front view showing another modified example, and Figs. 16 and 17 show a mounting state of the finishing blade tip. FIG. (1) (11) (21)… Finishing blade tip (2)… Slope side (3)… Slope curved surface (4)… Nose flank (5)… Sweeper edge (6)… Direct edge (30) ( 40) (50) (60)… Face mill

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[Procedure amendment]

[Date of submission] Flat 4.11.26 Regarding the title of the invention on page 1 of the description, "Finishing blade tip and face milling machine incorporating the finishing blade tip of this tip" means "Finishing blade tip and this finishing blade. Correct to "face milling machine incorporating chips".

Claims (3)

[Claims] 1. A square plate-shaped indexable finishing blade tip in which an inclined angle β of 5 ° to 30 ° is constituted by a flat inclined side surface (2), and the rake of the inclined side surface (2). On the surface side, a belt-shaped inclined curved surface (3) is formed so that a flat blade edge (5) with a large radius of curvature is formed in the approximate center of the inclined side surface (2). The radius of curvature R is set within the range of R = 80 to 2000 mm, and for the inclination angle β that constitutes the secondary clearance angle, a primary clearance angle α that is smaller than this is configured. Finishing blade chip that is characterized by 2. The slanted curved surface (3) of the finishing blade tip according to claim 1 is located separately on both sides of the slanted side surface (2) so that a straight blade edge is formed substantially at the center of the slanted side surface (2). Finishing edge chip where (6) remains and both sides have a flat edge (5) with a large radius of curvature. 3. The finishing blade tip according to claim 1 or 2 is incorporated, and the inclined side surface (2) of the finishing blade chips (1) (11) (21) serves as a positioning surface. Front milling cutter incorporated like.