A cutting tool including a rake face, a flank face, and a cutting edge portion, comprising a substrate and an AlTiN layer, the AlTiN layer including cubic Al.sub.xTi.sub.1-xN crystal grains, Al having an atomic ratio x of 0.7 or more and 0.95 or less, the AlTiN layer including a central portion, the central portion at the rake face being occupied in area by (200) oriented crystal grains at a ratio of 80% or more, the central portion at the flank face being occupied in area by (200) oriented crystal grains at a ratio of 80% or more, the central portion at the cutting edge portion being occupied in area by (200) oriented crystal grains at a ratio of 80% or more.

A coated tool includes a base and a coating layer located on the base. The coating layer includes a first layer having a thickness of 1 m or more located near the base, and a second layer including Al.sub.2O.sub.3 particles which is in contact with the first layer and is located more away from the base than the first layer. A difference (A2A1) between an erosion ratio A2 in the second layer and an erosion ratio A1 in the first layer is 0.60 to 0.30 m/g. The erosion ratio is obtained by collision of a liquid A in which 3 mass % of spherical Al.sub.2O.sub.3 particles having a mean particle diameter of 1.1-1.3 m is dispersed in pure water. A cutting tool includes a holder which includes a pocket, and the coated tool located in the pocket.

When a wheel clamp is used, width of a wheel is detected first, a first servo motor drives a lead screw to rotate, a supporting block and a lifting plate are automatically adjusted to appropriate heights via a nut, a manipulator puts the wheel onto end face blocks, air-tight devices are pressed down, an oil cylinder drives a chuck so that clamping jaws expand the central hole of the wheel, meanwhile, four air cylinders drive clamping blocks to compact outer side of the wheel, and the wheel is completely positioned; at this moment, a bolt hole of the wheel can be drilled; after machining, second servo motor drives right shaft, right lug plate and a turnover part to rotate certain angles via second decelerator; high pressure oil is introduced into cavities between ipsilateral expansion sleeves and end covers, and left and right shafts are separately locked by ipsilateral expansion sleeves.

The present application provides a method for machining a flange face of an aluminum alloy hub, comprising the steps of: (I) pre-machining a hub flange; (II) machining two times with a 120 R3 boring tool with a total machining amount of 2 mm, and then reserving a machining allowance of 2.4 mm on the flange face blank after processing; (III) machining two times with the 120 R3 boring tool with a total machining amount of 2 mm, and then reserving a machining allowance of 0.4 mm on the flange face blank after processing; (IV) machining with a 95 R0.8 hook tool, and then reserving a machining allowance of 0.05 mm on the flange face after processing; and (V) machining with the 95 R0.8 hook tool, then machining the remaining flange allowance, thus completing the machining.

A cutting tool, comprising a substrate having a cutting surface and a coating adhered to the cutting surface in a solid state, wherein the coating includes a soft metal and is capable of melting and functioning as an in-situ liquid lubricant when the cutting tool is applied in a machining operation. Also, a method of applying a coating to a cutting tool, comprising receiving a premachining workpiece, the premachining workpiece formed of a coating material including a soft metal; and machining the premachining workpiece with the cutting tool such that a layer of the coating material adheres to a cutting surface of the cutting tool in a solid state.

The invention relates to a method for the production of a mechanical part, comprising the following successive steps: casting of a billet of aluminum alloy with a composition (in weight %) of 0.4-3.0 Si; 0.6-2.0 Mg; 0.20-1.0 Cu; 0.15-1.8 Fe; Mn<0.5; Ni<1; Ti<0.15; Cr<0.35; Bi<0.8; Pb<0.4; Zr<0.04; other elements <0.05 each and <0.15 total, the remainder being aluminum; homogenization of the billet; extrusion of the billet in order to obtain an extruded product; quenching while at extrusion heat; optional cold-deformation and/or straightening, typically by means of pulling and/or drawing, and/or curing of the extruded product; tempering; optional cold-deformation of the extruded product, typically by drawing; machining of the resulting extruded product in order to obtain a turned mechanical part; optional shaping of the resulting mechanical part; anodizing of the resulting mechanical part at a temperature of between 15 and 40 C with a solution comprising between 100 and 250 g/l sulphuric acid and between 10 and 30 g/l oxalic acid and between 5 and 30 g/l of at least one polyol. The anodized turned mechanical parts obtained using the method of the invention have, in particular, advantageous roughness and excellent corrosion resistance and can be used, in particular, as brake pistons or gearbox elements.

A cam for use in trimming earing from an open end of an article following at least one forming process. The cam includes a cam profile for actuating a cam follower to which the article is coupled. The cam profile includes a generally sloped rising portion, a generally sloped retracting portion, and a working portion bridging the rising portion and the retracting portion. The working portion includes generally sloped sections separated by at least one recess or dwell.

A solid-lubricated metal cutter and processing method relates to the technical field of metal cutters. A surface texture morphology is worked out on a metal cutter, a solid lubricant is filled into the surface texture morphology, and a convex dam is arranged on the cutter surface on which surface texture morphology is located at a chip flow side. The surface texture morphology has micro-pit and micro-boss features, and can exert antifriction effect of a solid lubricant and anti-adhesion effect of micro-protrusions. The convex dam is arranged at an end of the micro-texture region away from the cutting blade, so that a part of the solid lubricant flows back to the texture region and thereby the utilization efficiency and retentiveness of the solid lubricant are improved.

Provided are a hole formation method enabling the formation of a high-quality hole even when a workpiece material is a difficult-to-machining metal material or a fiber-reinforced composite material and a drill bit used in the method. A drill bit includes at least one cutting edge and a leading flank adjacent to the cutting edge, and the leading flank is set to have a surface roughness Ra of 2.0 m or more and 3.0 m or less. A hole formation method includes a hole formation step of machining a portion to be processed of a workpiece material by means of drilling to form a hole while a lubricant material for assisting machining process is in contact with a drill bit and/or the portion to be processed, and in the hole formation step, the drill bit is used.

A drill (1) is provided with a thinning edge (7), a gash portion (8), a coolant passage, and an oil hole (12). The thinning edge (7) is provided at a leading end portion of a body (3), and extends toward a chisel portion (9) from an inner end (51) of a cutting edge (5). A ridge line between the gash portion (8) and the flank (6) extends in a circular arc shape from an inner end of the thinning edge (7) toward an outer peripheral surface (31) of the body (3). The coolant passage is provided inside a shank and the body (3), and extends from a rear end portion of the shank toward the leading end portion of the body (3). The oil hole (12) is provided at a gash face (81) of the gash portion (8) and is an outlet of the coolant passage.