Described are enclosures for electronic devices; the enclosures include a cover, a base, and a snap-fit engagement between the cover and the base; also described are methods of preparing the devices.

Described are methods for forming a friction stir weld between a steel piece and an aluminum piece, with specific examples of the steel piece and the aluminum piece being a cover and a base of an enclosure.

A modular valve body with a bimetallic option is shown and described herein. The modular valve body generally includes at least one end connector element joined to a housing. The housing may be formed from a first material, such as carbon steel. The end connector element may be formed from a second material, such as monel. In some versions of the modular valve body, in order to join the end connector element and the housing, the end connector element is rotated and pressed against the housing to heat both materials and create a friction weld therebetween.

The present disclosure relates to the technical field of welding, and particularly relates to a welding method for sealing a cooling-water channel of an electric-machine housing. The method includes the steps of: 1) seal the opened ends of the cooling-water channel using the sealing parts to form an S-shaped sealed cooling water channel inside the electric-machine housing; and 2) weld each of the sealing parts and the electric-machine-housing together by using the friction-stir-welding, in one single and complete single-welding-seam mode. The present disclosure utilizes the stirring head having a larger diameter to sufficiently stir-weld each of the sealing parts and the electric-machine housing all at once, i.e., welding in the single-welding-seam mode, so that the welding can be completed at one time, which, as compared with the conventional mode of double-welding-seam mode, has a higher operation efficiency, a better stability, and reduces welding duration by ½ to ⅓.

A method for forming a large-diameter special-shaped cross section thin-wall tubular part. A tailor welded barrel blank is adopted as an original blank for forming of the large-diameter special-shaped cross section thin-wall tubular part. After a desired shape is formed, the original weld joint is removed and butt joint tailor welding is performed on the tubular part again. Since the tailor weld joint of the original barrel blank is removed from the final part, there is no need to consider the consistency or coordination of the microstructure of the weld joint and the base metal during the forming process and the subsequent thermal treatment process.

A bit that includes reclaiming a substantially solid body from a consumed conical bit. The substantially solid body includes a truncated forward body portion where the destroyed bit was removed and a generally cylindrical shank portion depending axially from the forward body portion. A new forward portion that includes a generally cylindrical bore or a tapered bore axially extending from a forward end of the forward portion is welded to an interface of the truncated forward body portion of the substantially solid body.

A method of manufacturing a high-pressure fluid vessel includes forming a first portion of a high-pressure fluid vessel with a molding process. The high-pressure fluid vessel includes a stack of capsules. Each capsule includes a first domed end, a second domed end, and a semicylindrical portion extending between and connecting the first domed end to the second domed end. The method further includes forming a second portion of a high-pressure fluid vessel with the molding process. The second portion of the high-pressure fluid vessel is positioned adjacent to the first portion of the high-pressure fluid vessel. The second portion of the high-pressure fluid vessel is welded to the first portion of the high-pressure fluid vessel.

A method for manufacturing an internally cooled valve (2), includes providing a valve body (4) having a valve stem (6) that ends in a valve head (8). The valve body (4) has a cavity (10) that is open toward the valve head (8) and with a valve base element (12) by friction welding the valve base element (12) to the valve head (8). The valve bottom element (12) is preferably a sintered component.

A friction stir spot welding device which welds an object to be welded, by softening the object by friction heat and by stirring the object, has a tool with a cylindrical shape, the tool being rotatable around an axis thereof, advanceable along a direction of the axis, and retractable along the direction of the axis, a temperature detector which detects a temperature of the tool when a welding step for the object starts, and a controller configured to compare the temperature of the tool which is detected by the temperature detector to a predetermined reference temperature to set a plunging force applied by the tool to press the object.

A deposition apparatus for processing substrates includes a vacuum chamber including a processing zone in which a substrate may be processed. A showerhead assembly includes a stem, face plate and back plate wherein the stem is rotary friction welded to the back plate. A substrate pedestal assembly is configured to support a substrate on an upper surface thereof when a substrate is processed in the deposition apparatus.