Provided is a machining apparatus capable of improving the positioning accuracy of a machining tool as compared to conventional machines. A machining apparatus 1 includes a rotating tool, a machining tool provided on an outer periphery of the rotating tool, and a spindle head adapted to rotatably support the rotating tool. The machining apparatus includes a driving portion configured to move the spindle head in a direction perpendicular to an axis of rotation R of the rotating tool, a position sensor configured to measure a position of the spindle head on a plane perpendicular to the axis of rotation R, and a control unit configured to control the driving portion so as to move the machining tool in a direction perpendicular to the axis of rotation R of the rotating tool on the basis of the position of the spindle head.

An apparatus for cutting annular corrugations in an interior surface of a cylindrical tube having a cutter head comprising a plurality of cutting teeth; a drive shaft coupled to the cutter head for spinning the cutter head; a mandrel coupled to the cutter head, wherein the mandrel defines a longitudinal axis, wherein an axis of rotation of the cutter head is parallel to, but in a position not coaxial with the axis of rotation of the cutter head; an outer eccentric coupled to mandrel, wherein the outer eccentric rotates the mandrel, wherein the axis of rotation orbits around the longitudinal axis.

An apparatus for cutting annular corrugations in an interior surface of a cylindrical tube having a cutter head comprising a plurality of cutting teeth; a drive shaft coupled to the cutter head for spinning the cutter head; a mandrel coupled to the cutter head, wherein the mandrel defines a longitudinal axis, wherein an axis of rotation of the cutter head is parallel to, but in a position not coaxial with the axis of rotation of the cutter head; an outer eccentric coupled to mandrel, wherein the outer eccentric rotates the mandrel, wherein the axis of rotation orbits around the longitudinal axis.

An apparatus for more effectively extracting energy resources from underground reservoirs and a method for manufacturing the same. The apparatus is a perforating gun that includes scallops shaped such that charges that are displaced from their original location nevertheless remain located below the scallop, which increases the effectiveness of displaced charges when detonated. In addition, the scallops are created using a method that enables the entire scallop to be of a uniform thickness, which also increases the effectiveness of charges detonated beneath the scallop.

An apparatus for more effectively extracting energy resources from underground reservoirs and a method for manufacturing the same. The apparatus is a perforating gun that includes scallops shaped such that charges that are displaced from their original location nevertheless remain located below the scallop, which increases the effectiveness of displaced charges when detonated. In addition, the scallops are created using a method that enables the entire scallop to be of a uniform thickness, which also increases the effectiveness of charges detonated beneath the scallop.

A drilling and milling tool (100) for a metallic workpiece, with a drilling and milling shank (120) having a plurality of circumferentially-cutting cutter tips (151, 152, 153, 154) and a plurality of front-end-cutting cutter tips (131, 132). At least one of the front-end-cutting cutter tips (132) is, at the same time, a circumferentially-cutting cutter tip whose radially outermost cutting point or cutting edge section projects, in the radial direction (R), beyond the circumferentially-cutting cutter tips (151 152, 153, 154). The circumferentially-cutting cutter tips (151, 152, 153, 154) are made with straight cutting edges and together these cutting edges produce a cylindrical cut contour. Two methods that can be carried out with the drilling and milling tool (100) for producing a through-going bore in a metallic workpiece.

A method of chamfering an aperture in a reel member of a tensioning system for an article of footwear is disclosed. The tensioning system includes a reel member configured to rotate about a central axis. The reel member includes a shaft and at least one flange disposed along the shaft. The flange includes an aperture extending through the flange. The aperture is configured to receive a lace. The reel member can tighten the tensioning system by winding the lace around portions of the shaft disposed on both sides of the at least one flange. The method of chamfering the aperture includes drilling through an end flange of the reel member to reach the center flange of the reel member in order to chamfer the aperture. The chamfered aperture can assist with sliding the lace through the aperture and distributing tension.

The present invention related to a hockey puck configured to transmit a radio signal, the hockey puck comprising: a cylindrical body, a radio Transmitter arranged in a cavity inside the cylindrical body, the cavity machined through a cylindrical surface of the cylindrical body, wherein the radio transmitter is positioned in the cavity with a casting material applied to the cavity. Further, the invention relates to a method for manufacturing the hockey puck.

The present invention related to a hockey puck configured to transmit a radio signal, the hockey puck comprising: a cylindrical body, a radio Transmitter arranged in a cavity inside the cylindrical body, the cavity machined through a cylindrical surface of the cylindrical body, wherein the radio transmitter is positioned in the cavity with a casting material applied to the cavity. Further, the invention relates to a method for manufacturing the hockey puck.

A method and device for milling a large-diameter aspheric surface by using a splicing method and a polishing method to solve the problems of large time consumption and serious tool wear in the machining of a meter-scale large-diameter aspheric surface are disclosed. where an aspheric surface is discretized into a series of rings with different radii, and the rings are sequentially machined via generating cutting by using an annular grinding wheel tool with an outer diameter less than ¼ of a diameter of the aspheric surface; the rings are equally spaced, there are a total of N rings, and a width of any ring is jointly determined by the N.sup.th ring, the (N−1).sup.th ring, positioning accuracy and a generatrix equation of the aspheric surface; and the aspheric surface is enveloped by a large number of rings. A contact area between the tool and a workpiece surface is rings.