摘要:
Provided is a method of manufacturing an elbow, including: a first cutting step of cutting a material by relatively moving a cutting section of a cutting tool, which is formed of at least a part of a substantially spherical shape, along an inner side surface of the elbow to be finished in a direction from a first end surface to a second end surface of the material; and a second cutting step of cutting the material by relatively moving the cutting section along the inner side surface of the elbow to be finished in a direction from the second end surface to the first end surface of the material.
摘要:
In a ball end mill, a rotational locus is described by cutting edges (12a, 13a) of respective throw-away tips (12, 13) mounted to a tool body (10). The cutting edge (12a) of one of the tips (12) and the cutting edge (13a) of the adjacent tip (13) overlap with each other, and the center of the overlapping portion is located at a position that is substantially 45° from a forward end of the cutting edge (12a) along a 1/4 arc of the rotational locus therefrom. The overlapping length (ℓ) is 1/4 to 1/3 of a diameter (D) of the rotational locus in an arcuate length thereof. A planar section is formed at a side surface of at least one of the tips (12), which is located at a forward end of the tool body (10). The side surface is located adjacent a forward end of the cutting edge (12a). A planar surface is formed at at least one of the tip Pockets formed in the tool body (10), at a position facing toward the planar section. The planar surface is subject to a radial cutting force acting from the throw-away tip (12) having the planar section. The planar section is abutted against the planar surface.
摘要:
In a ball end mill, a rotational locus is described by cutting edges (12a, 13a) of respective throw-away tips (12, 13) mounted to a tool body (10). The cutting edge (12a) of one of the tips (12) and the cutting edge (13a) of the adjacent tip (13) overlap with each other, and the center of the overlapping portion is located at a position that is substantially 45° from a forward end of the cutting edge (12a) along a 1/4 arc of the rotational locus therefrom. The overlapping length (ℓ) is 1/4 to 1/3 of a diameter (D) of the rotational locus in an arcuate length thereof. A planar section is formed at a side surface of at least one of the tips (12), which is located at a forward end of the tool body (10). The side surface is located adjacent a forward end of the cutting edge (12a). A planar surface is formed at at least one of the tip Pockets formed in the tool body (10), at a position facing toward the planar section. The planar surface is subject to a radial cutting force acting from the throw-away tip (12) having the planar section. The planar section is abutted against the planar surface.
摘要:
Provided is a method of manufacturing an elbow, including: a first cutting step of cutting a material by relatively moving a cutting section of a cutting tool, which is formed of at least a part of a substantially spherical shape, along an inner side surface of the elbow to be finished in a direction from a first end surface to a second end surface of the material; and a second cutting step of cutting the material by relatively moving the cutting section along the inner side surface of the elbow to be finished in a direction from the second end surface to the first end surface of the material.
摘要:
Disclosed is a tool for chipping the concave, spherical surface (3, 3') of a workpiece (5), comprising a tool head (13) which is provided with at least one knife plate (17, 17', 19, 19') having at least one blade (31, 31', 31 ). Said knife plate (17, 17', 19, 19') is mounted in a recess of the tool head (13) base and fixed therein in such a way that it is inclined at an acute angle to an imaginary plane running tangentially to the outer surface (15, 15') of the tool head (13) in the area of the knife plate.
摘要:
Die Erfindung betrifft einen Schneideinsatz mit drei effektiv nutzbaren, eine Spanfläche begrenzenden Schneidkanten, jeweiligen Freiflächen und einer Auflagefläche. Um einen Schneideinsatz für einen Kugelkopffräser zu schaffen, der relativ kurze aktiv nutzbare Schneidkanten besitzt und der einheitlich in dem genannten Werkzeug verwendet werden kann, wird vorgeschlagen, daß zwei der Schneidkanten (19, 20) über ihre in Draufsicht auf die Spanfläche betrachteten Länge konvex gekrümmt sind und die dritte Schneidkante (14) in Draufsicht auf die Spanfläche betrachtet geradlinig ausgebildet ist.
摘要:
Ball nose end mill and method of manufacturing replaceable on-edge high positive single cutting edge triangular inserts each with a pair of dovetail side walls firmly secured by a central screw in a matching dovetail body pocket. Right cylindrical or conical segment convex surface terminating in arcuate cutting edge for generating hemispherical segment is pressed on powdered metal blank with positive rake angle by oblique faced punch and reaction end of uniform straight triangular wall die inherently developing the dovetail side walls.