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.

When a closed type impeller is manufactured from one block, a rough cutting process of cutting a flow path region of a block using a rough cutting tool, and a residue-cutting process of cutting a cutting residue in the cutting process using a residue-cutting tool are executed. The residue-cutting tool has a tool main body having a blade formed on an outer periphery thereof, and a handle having the tool main body fixed to a distal end thereof. A maximum outer diameter of the tool main body is larger than a minimum outer diameter of the handle. Further, the tool main body has a rear blade directed in a direction including a tool rear side component.

The purpose of the present invention is to provide a cutting insert capable of reducing cutting load and enhancing squareness. A cutting insert, according to one embodiment of the present invention, comprises: first and second end surfaces which face opposite directions to each other and have four corners wherein two ascending corners are placed in one diagonal position, and two descending corners lower than the height of the ascending corners are placed in the remaining diagonal position; first and second main side surfaces which are placed between the first and second end surfaces, face in opposite directions to each other, and have a throughhole connecting the first and second main side surfaces to each other; and first and second auxiliary side surfaces placed between the first and second end surfaces and between the first and second main side surfaces, wherein, when seen from the first or second end surface, each of the first and second main side surfaces comprises: a central main clearance surface placed on a central portion thereof; a first peripheral main clearance surface which is placed between the central main clearance surface and the ascending corners, and which forms an obtuse angle with respect to the central main clearance surface such that the central main clearance surface may protrude; and a second peripheral main clearance surface which is placed between the central main clearance surface and the descending corners, and forms an obtuse angle with respect to the central main clearance surface such that the central main clearance surface may protrude.

An interpolated roughening cutting tool includes a body having at least first and second cutting elements coupled thereto. The first cutting element includes rectangular cutting teeth. The second cutting element includes non-rectangular cutting teeth. The first and second cutting elements are configured to create grooves in a surface that have a top portion with blunt edge surfaces.

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.

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.

Tools and methods for forming modified mechanical roughening profiles are disclosed. In at least one embodiment, an engine block is provided including a body defining a cylinder bore having a bore surface. The bore surface may have defined therein a plurality of grooves extending from the bore surface and each groove may have a base and a top portion. The top portion may have opposing chamfered edges. The chamfered edges may be formed by a tool including at least one cutting element having triangular teeth and at least one cutting element having rectangular teeth. In another embodiment, a tool including at least one cutting element having curved teeth and at least one cutting element having rectangular teeth may be used to form grooves having a curved/radiused edge surface. The disclosed roughening profiles may reduce oxide growth when a coating is applied to the bore surface.

A cutting tool according to an aspect of the present disclosure includes a shank, a joint, and a cutting portion attached through the joint to the shank. The cutting portion includes a core and a surface portion. The surface portion is disposed around a central axis of the cutting portion to cover an outer circumferential surface of the core. The surface portion includes a cutting edge. The cutting edge is disposed on an outer circumferential surface of the surface portion and formed in a helical shape about the central axis. The surface portion is a composite sintered material including a hard phase formed of a plurality of diamond particles and a plurality of cubic boron nitride particles, and a binder phase forming the remainder.

A milling cutter is configured to process an edge of a workpiece to a required profile. The required profile includes a first portion and a second portion coupled to the first portion. The milling cutter includes a shank having a central axis, at least one first cutting edge, and at least one second cutting edge. The first cutting edge is configured to rotate around the central axis of the shank along a first rotation path to process the first portion of the predetermined profile, and the second cutting edge is configured to rotate around the central axis of the shank along a second rotation path to process the second portion of the predetermined profile. The first rotation path is different from, and connected to the second rotation path.

An end mill, preferably made of solid carbide, with a fastening section and a cutting area, in which the cutting area is formed by a core and three or four cutting edges running helically around the axis of rotation of the end mill and arranged around core; each of which has a peripheral main cutting edge and a secondary cutting edge on a face of the cutting area. On the face of the cutting area at least one point thinning of core is provided between two adjacent cutting edges. In order to create end mills that are simple to manufacture and optimized for drilling, the point thinning has an angle of 30 to 40 relative to the axis of rotation of the end mill.