Abstract:
A center or non-center cutting end mill (10) for orbital drilling of fiber reinforced plastic (FRP) materials includes a shank (12), a neck (14), a cutting head (16)and two or more flutes (36, 38). The end mill (10) has a tool geometry with the following features: a dish angle (28) between about 2 degrees to about 6 degrees; a helix angle (44) between about 5 degrees to about 18 degrees; an end teeth radial rake angle (46) between about 0 degrees and about 15 degrees; a peripheral teeth radial rake angle (47) between about 8 degrees and about 16 degrees; a gashing axial rake angle (48) between about 3 degrees to about 10 degrees; and a primary clearance angle between about 10 degrees to about 18 degrees. The end mill is made from a tungsten carbide substrate with cemented cobalt and a diamond coating.
Abstract:
Hard coatings (2) and methods of making the hard coatings (2) comprising aluminum titanium nitride which are usable on cutting tools are disclosed. The coatings (2) include at least one aluminum titanium nitride layer (6) having between about 0 and about 15 weight percent hexagonal phase and a composition of (Al x Ti 1-x )N, where x is in the range of about 0.53 to about 0.58 moles.
Abstract translation:公开了硬质涂层(2)和制造可用于切削工具的包含氮化铝钛的硬质涂层(2)的方法。 所述涂层(2)包括至少一个具有约0重量%至约15重量%六方相的氮化铝钛层(6)和(Al x Ti 1-x) N,其中x在约0.53至约0.58摩尔的范围内。 p>
Abstract:
A wear resistant multilayer nitride hard coating (2) for substrates (6). The hard coaling (2) includes a first layer (4) of titanium aluminum nitride and a second layer (8) comprising a plurality of sublayer groups (10a). Each sublayer group (10a) includes a first sublayer (12) of titanium silicon nitride and a second sublayer (14) of titanium aluminum nitride. The composition of the titanium aluminum nitride, both in the first layer (4) and in the sublayer groups (1Oa)5 is (Ti x AI 1-x )N, wherein 0.4 ≤ x ≤ 0.6, The composition of the titanium silicon nitride sublayers (12) is (TiySi 1-y )N, wherein 0.85 ≤ y ≤ 0.98, and all of the silicon is in solid solution in the titanium silicon nitride such that no silicon phase or silicon nitride phase exists in this sublayer (12). The combined amount of aluminum and silicon present in the sublayer groups (10A) is narrowly controlled such that the sum of x and y is in the range of 1.38 to 1.46.
Abstract translation:一种用于基板(6)的耐磨多层氮化物硬涂层(2)。 硬涂层(2)包括氮化钛铝的第一层(4)和包括多个子层组(10a)的第二层(8)。 每个子层组(10a)包括氮化硅钛的第一子层(12)和氮化铝钛的第二子层(14)。 在第一层(4)和子层组(10a)5中的氮化铝钛的组成为(TixA1-x)N,其中0.4 = x = 0.6。氮化硅钛层(12 )是(TiySi1-y)N,其中0.85 = y = 0.98,并且所有的硅在氮化硅钛中是固溶体,使得在该子层(12)中不存在硅相或氮化硅相。 存在于子层组(10A)中的铝和硅的组合量被狭窄地控制,使得x和y之和在1.38至1.46的范围内。
Abstract:
A center or non-center cutting end mill (10, 10', 10'') for orbital drilling includes a shank (12) having a shank diameter (20); a neck (14) having a neck diameter (22); a cutting head (16) having a cutting diameter (24); a corner radius (30); a dish angle (28); and a longitudinal axis (18), the cutting head including a forward cutting end (26) having a convexly curved section (29) located between the longitudinal axis and the corner radius, wherein the convexly curved section causes material removed from a workpiece to flow radially outward from an initial contact area (31) toward the corner radius, thereby minimizing the accumulation of material in a central portion (26a) of the forward cutting end.
Abstract:
An article including a substrate 22 and a coating is provided. The article may be a cutting insert 20 shown to improve performance in chip-forming material removal operations or a wear-resistant component for chipless forming operations. One wear-resistant coating scheme 40 has an underlayer 42 and top layer 46 containing aluminum, chromium, and nitrogen. The coating scheme 40 also includes a mediate multi-periodicity nanolayer coating scheme 44 containing titanium, aluminum, chromium and nitrogen. The mediate multi-periodicity nanolayer 44 coating scheme includes a plurality of sets of alternating layer arrangements 50, 52, 54, 56, 58, 60, 62. Each one of the alternating layer arrangements 50, 52, 54, 56, 58, 60, 62 has a base layer 64 comprising titanium, aluminum and nitrogen and a nanolayer region having a plurality of sets of alternating nanolayers 68, 70, 72, 74, 76, 78. Each set of alternating nanolayers 68, 70, 72, 74, 76, 78 has one nanolayer 82 having aluminum, chromium, titanium and nitrogen and another nanolayer 84 having aluminum, chromium, titanium and nitrogen. The base layer thickness G is smaller than the nanolayer region thickness F.
Abstract:
A diamond coated drill (10) capable of drilling holes in fiber reinforced composite materials. The drill (10) is made from a tungsten carbide (WC) substrate with cemented cobalt (Co) in a range between about 3 to 10 wt. % and a diamond coating having a thickness in a range between 3 to 20 microns. The drill (10) includes a shank (11), a longitudinal axis and includes two flutes (14 and 16) at a helix angle (18) that is in a range between 25 and 35 degrees with respect to the axis (12). A margin width (24) is maintained between about 5 to 10 percent of the drill diameter (22). A body clearance diameter (26) is maintained at between about 92 to 96 percent of the drill diameter (22). A web thickness (28) before splitting is about 20 to 30 percent of the drill diameter (22). A clearance angle or lip relief angle (36) is between about 10 and 20 degrees. A chisel edge angle (42) is between about 105 and 120 degrees. A chisel edge length (43) is up to about 0.035mm. A splitting angle (44) is between about 130 and 150 degrees. A notch angle (46) is between about 30 and 40 degrees with respect to the drill axis (12). A notch rake angle (48) lies between about -5 and 10 degrees. A split point angle (34) is between about 70 and 100 degrees, and preferably about 90 degrees.