Methods and structures for forming anodization layers that protect and cosmetically enhance metal surfaces are described. In some embodiments, methods involve forming an anodization layer on an underlying metal that permits an underlying metal surface to be viewable. In some embodiments, methods involve forming a first anodization layer and an adjacent second anodization layer on an angled surface, the interface between the two anodization layers being regular and uniform. Described are photomasking techniques and tools for providing sharply defined corners on anodized and texturized patterns on metal surfaces. Also described are techniques and tools for providing anodizing resistant components in the manufacture of electronic devices.

A chamfering tool that chamfers an opening edge of a target hole formed in a work, the chamfering tool including a support shaft, a base shaft having the support shaft on a tip end side thereof and being eccentric with respect to the support shaft, and a blade portion having a rake face that is a step surface of a step protrusion portion protruded laterally from the support shaft or that is an end surface of the support shaft. The blade portion including an edge line in a shape of a curve and being bulged to a side away from a center axis of the support shaft, and the edge line being inclined with respect to an axial direction of the support shaft.

Disclosed is a pneumatic milling wheel cap section burr device, which includes a lifting cylinder, guide posts, guide sleeves, a lifting table, adjusting guide rails, an adjusting slide block, an adjusting cylinder, a connecting rod, a turnover platform, feeding guide rails, a feeding platform, a feeding cylinder, an air compressor and a pneumatic milling cutter. A servo motor drives a rotating table to turn over 90 degrees, and the clamped wheel can turn over 90 degrees, so that the wheel is upright; the lifting cylinder drives the lifting table to move up and down to adjust the height of the pneumatic milling cutter; and the adjusting cylinder adjusts the angle of the turnover platform to adjust the contact angle of the pneumatic milling cutter and the cap section edge.

Disclosed is a wheel cap section chamfering device, comprising a main frame, a secondary frame, a lower servo motor, a key, a bearing seat, a left bearing seat, a left shaft, a left bearing, a left driven friction wheel, a left sleeve, left corner cylinder pressure claws, a left turntable, a left mandrel seat, a left mandrel, a chamfer mill, a tool apron, a feeding platform, a feeding cylinder, guide sleeves, guide posts, a support plate, guide rails, a compression cylinder, a translation sliding table, an upper servo motor, a driving friction wheel, a right mandrel, a right mandrel seat, a right turntable, right corner cylinder pressure claws, a right sleeve, a right driven friction wheel, a right bearing, a right shaft, a right bearing seat, a station rotating platform, a shaft and a bearing.

Various components of an electronic device housing and methods for their assembly are disclosed. The housing can be formed by assembling and connecting two or more different sections together. The sections of the housing may be coupled together using one or more coupling members. The coupling members may be formed using a two-shot molding process in which the first shot forms a structural portion of the coupling members, and the second shot forms cosmetic portions of the coupling members.

A reversible cutting insert for milling has first and second cutting edges formed at the transitions from the top and bottom surfaces to a lateral face. The cutting insert has a 4-fold rotational symmetry. A reference plane extends perpendicular to the axis of symmetry. The cutting edges have four cutting edge portions. One cutting edge portion is a main edge and a wiper edge that are connected by a rounded cutting corner. The first and second cutting edges are at the greatest distance from the reference plane in the region of the cutting corners. Main and wiper clearance faces directly adjoin an assigned main edge and wiper edge, respectively, in the circumferential lateral face. Exterior angles between the main clearance faces and the reference plane are greater than exterior angles between the wiper clearance faces and the reference plane.

An automatic movable machine includes a vertical plate and a support plate are fixed, in a perpendicular direction to each other, to a semicircular chamfering angle adjusting plate fixed to a head of the movable chamfering machined, a moving body is provided at the vertical plate on the inside of the pipe or the lower side of the metal sheet, and equipped with an internal roller regulated by a spring contact with the inside of the pipe or the lower side of the metal sheet, the support plate has a fixing bolt, a fixing plate is provided to the support plate, and provided at the front of a gear box, and external rollers are provided at the front of the gear box, and allow the speed of the rotational force of a motor, to be reduced in the gear box and transmit the speed-reduced rotational force.

An indexable mill includes a tool holder and an indexable bit. The tool holder has a positioning shaft whose one side is provided with a braking block that has curved mortises. The positioning shaft is centrally provided with a threaded hole. The indexable bit is centrally provided with a positioning hole. The positioning hole of the indexable bit has its one side formed with a braking notch. The plug-socket like connection between the positioning shaft of the tool holder and the positioning hole of the indexable bit provides a first positioning function. The wrapping, curved surface contact between the braking block and the braking notch provides a second positioning function. The dual positioning enhances stability and rigidity of the combination.

A chamfering tool that chamfers an opening edge of a target hole formed in a work, the chamfering tool including a support shaft, a base shaft having the support shaft on a tip end side thereof and being eccentric with respect to the support shaft, and a blade portion having a rake face that is a step surface of a step protrusion portion protruded laterally from the support shaft or that is an end surface of the support shaft. The blade portion including an edge line in a shape of a curve and being bulged to a side away from a center axis of the support shaft, and the edge line being inclined with respect to an axial direction of the support shaft.

A front and back chamfering rotary milling cutter includes a cutter body including an insert pocket and a star-shaped indexable cutting insert releasably retained in the pocket. The cutting insert has star-shaped upper and lower surfaces connected by a peripheral surface intersecting each of the upper and lower surfaces. The cutting insert includes a plurality of circumferentially alternating inner and outer corner portions. A cutting portion is defined by each outer corner portion together with an adjacent first inner corner portion rotationally forward thereof and an adjacent second inner corner portion located rotationally rearward thereof. Each cutting portion includes a front chamfering cutting edge extending from the outer corner portion to the first inner corner portion and a back chamfering cutting edge extending from the outer corner portion to the second inner corner portion.