The present invention provides an aluminum wheel burr removing machine which includes a roller bed device (1), a positioning and rotating device (2) and a knife box device (3). A wheel (4) is conveyed to a specified position by the roller bed device (1), the positioning and rotating mechanism (2) clamps and rotates the wheel (4), the knife box device (3) horizontally feeds to cut burrs of the wheel (4), the roller bed device (1) conveys the wheel to next station, meanwhile, next wheel enters the roller bed device (1), and next cutting cycle is carried out. The machining time of the present invention is 25-30 seconds, so that the manpower cost is reduced, the machining efficiency is improved, and positive effects are achieved in hub burr removal.

A drill includes a shank and a body having an outer peripheral surface with a certain outer diameter and a distal end tapered surface of a certain distal end angle. The drill includes a pilot shaft portion projecting from the distal end tapered surface of the body and having a diameter smaller than the body and having an outer peripheral surface of a certain outer diameter. The drill further includes an odd number of twisted grooves extending from the outer peripheral surface of the body to the outer peripheral surface of the pilot shaft portion at a certain twisted angle, an odd number of main cutting edges formed on the distal end tapered surface of the body by forming of the twisted grooves, and an odd number of auxiliary cutting edges formed on the distal end tapered surface of the pilot shaft portion by forming of the twisted grooves.

A sintered material includes a first material and a second material, the first material being partially stabilized ZrO.sub.2 having a crystal grain boundary or crystal grain in which 5 to 90 volume % of Al.sub.2O.sub.3 is dispersed with respect to a whole of the first material, the second material including at least one of SiAlON, silicon nitride and titanium nitride, the sintered material including 1 to 50 volume % of the first material.

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.

A chuck for mounting workpiece is disclosed. A chuck for mounting workpiece includes a chuck body; and a base jaw mounted on the chuck body. The chuck body includes an aluminum alloy. The chuck body includes an aluminum alloy having specific gravity smaller than that of alloy steel for machining structural use or carbon steel for machine structure use. Thus, the chuck can be light weight.

A rotary boring tool with detachable inserts, including a rotating insert carrier body including cartridges holding detachable cutting inserts configured to machine a cylinder barrel by axial movement of the tool in the barrel, and including a first cutting insert configured to rough-cut grooves in the material to be machined, a second insert configured to finish the grooves roughly cut by the first insert, and a third levelling insert configured to level rough material generated by the first two inserts.

In a first embodiment, at a time of magnetic pulse welding, a stepped tube profile machining process axially bores a walled tube from an end inward to a transition depth to form a section with a reduced wall thickness and then axially bores the walled tube from the transition depth to a fall off depth, thereby forming a section with a maximized welding wall section. In a second embodiment, also at a time of magnetic pulse welding, a surface angle tube profile machining process axially bores at a surface angle a walled tube from an end to a bore length to form an angular welding wall thickness inward to a maximized wall section. For both embodiments, the bored surfaces are virgin with no pits, oil, residue, or oxidation thereon, thus making the machined walled tubes available for immediate magnetic pulse welding.

A process for creating custom fixtures for parts that are to be CNC lathe machined is fully automatic and requires no human interaction. The customer's CAD file is computer analyzed to determine whether the part's dimensions fit within an available CNC lathe turning center for forming out of a cylindrical stock bar. The longitudinal axis is identified, and a set of tool paths is developed for cutting the part from two respective directions. A corresponding tool path is developed for CNC lathe cutting a bushing, preferably from the same bar stock, which generally represents the negative space around circular cross-sections of the part, in monotonically increasing diameters from the first end of the part. The bushing is then used to hold the part in the chuck during machining the second end of the part from the opposite direction.

The present invention provides an online aluminum wheel burr removing machine which includes a roller bed device (1), a positioning and rotating device (2) and a knife box device (3). A wheel (4) is conveyed to a specified position by the roller bed device (1), the positioning and rotating mechanism (2) clamps and rotates the wheel (4), the knife box device (3) horizontally feeds to cut burrs of the wheel (4), the roller bed device (1) conveys the wheel to next station, meanwhile, next wheel enters the roller bed device (1), and next cutting cycle is carried out. The machining time of the present invention is 25-30 seconds, so that the manpower cost is reduced, the machining efficiency is improved, and positive effects are achieved in hub burr removal.

A surface coated cutting tool comprises: a tool substrate and a coating layer on a surface of the tool substrate; wherein the coating layer comprises a lower layer, an intermediate layer, and an upper layer, in sequence from the tool substrate toward the surface of the tool. The lower layer comprises an A layer having an average composition represented by formula: (Al.sub.1-xCr.sub.x)N, where x is 0.20 to 0.60; the intermediate layer comprises a B layer having an average composition represented by formula: (Al.sub.1-a-bCr.sub.aSi.sub.b)N, where a is 0.20 to 0.60 and b is 0.01 to 0.20; and the upper layer comprises a C layer having an average composition represented by formula: (Ti.sub.1--Si.sub.W.sub.)N where is 0.01 to 0.20 and is 0.01 to 0.10; and the upper layer has a repeated variation in W level with an average interval of 1 nm to 100 nm between adjacent local maxima and minima.