Abstract:
Es wird ein Verfahren zum Herstellen einer Rolle (1) und eine Rolle (1) zum Führen und/oder Stützen eines Strangs (5) einer Stranggießanlage mit einem einen Eisenwerkstoff aufweisenden Grundkörper (2) und mit einer eine Rollfläche (4) für den Strang (5) ausbildenden Schicht (3) aufweisend eine Kupferlegierung gezeigt, wobei die Schicht (3) mit dem Grundkörper (2) über eine Schweißverbindung stoffschlüssig verbunden ist. Um die Standfestigkeit der Rolle zu erhöhen, wird vorgeschlagen, dass die Schicht (3) über deren Auftragsschweißverbindung (6) mit dem Grundkörper (2) stoffschlüssig verbunden ist.
Abstract:
A laser match honing system and method are provided for processing one of a pair of mechanically matching components (1, 2) having matching portions (12, 22, 16, 26) that will be fitted with each other. A dimension of the matching portion (12, 16) of the first component (1) is measured and is then used for calculating the desired dimension of the corresponding matching portion (22, 26) of the second component (2). An actual dimension of the matching portion (22, 26) of the second component (2) is also measured. Then, the matching portion (22, 26) of the second component (2) is honed by laser beam in the condition that the actual dimension is not equal to the desired dimension.
Abstract:
A porous balloon (14) or other catheter structure is formed by creating specific size pores (24) for delivering an agent to a body lumen (18). The pores can be created by passing matter or energy through the surface of the catheter structure, as by a laser (35) or a projectile (51). In the case of laser, the catheter structure can be reversed so that the inner surface becomes the outer surface to convert diverging pores into converging pores. In the case of projectiles, a pore size can be achieved by selecting an appropriate size and shaped projectile to obtain the desired characteristic. Alternatively, a material to make the catheter structure can include impurities (29,59) that can be removed once the catheter structure is set, leaving pores where the material formed around the impurities.
Abstract:
An indirect spot welding method is provided in which, in indirect spot welding, nuggets formed in a fused state can be stably obtained. In the indirect spot welding method, the welding time is divided into two time periods t 1 and t 2 , where electrode force F 1 and current C 1 are applied in the first time period t 1 , and electrode force F 2 lower than electrode force F 1 and current C 2 higher than current C 1 are applied in the next time period t 2 .
Abstract:
A method of manufacturing high-heat-load equipment including a carbon material (11) and a copper alloy material (16) which are joined with each other includes: forming a titanium thin layer (12) on a surface of the carbon material (11); positioning the carbon material so that the titanium thin layer (12) is opposed to the copper alloy material (16) while an interlayer (14) is Interposed between the carbon material (11) and the copper alloy material (16); inserting a brazing material sheet (13,15) into a space between the carbon material (11) and the interlayer (14), as well as into a space between the interlayer (14) and the copper alloy material (16), so as to prepare an assembly of the materials; and subjecting the assembly to a vacuum brazing process and further to an aging process.
Abstract:
A rod-based well screen is formed in place on a perforated pipe base by wrapping wire around the pipe base and a plurality of rods located around the outside of the pipe. The wire is welded sequentially to each individual rod as it is wrapped around the pipe. The welding and ground electrodes engage the wire and the rods respectively. The rod engaging ground electrode is positioned a short distance ahead of the wire being wrapped around the rods and the pipe base. The ground electrode Includes a plurality of contacts. Each contact is mounted to pivot toward and away from a rod. Springs urge each contact toward a rod to hold the rod against the outside surface of the pipe base and to maintain good electrical contact between the contact and the rod.
Abstract:
A tool for and a method of bonding layers of a shell by the differential pressure bonding process are described. The tool (10) and method includes a plurality of separable mandrel segments (70,80) that combine to form a mandrel having a longitudinal axis, an outer surface, an upper end, and at least one substantially continuous inner surface (82). The inner surface (82) has a substantially axisymmetric shape having complex curvature. In this embodiment, the tool (10) further includes a retort (40) configured to at least partially shroud the outer surface and upper end of the hollow body. The retort (40) includes at least one vacuum port. The tool (10) is configured to facilitate the compression of a plurality of layers of a multi-layer shell having complex curvature as the shell layers and an interdisposed bonding material are heated to an elevated bonding temperature.