Abstract: The invention has an object to permit to mold metal molds having a thixothropic structure by melting, agitating and weighing, injection molten metal in a melting vessel by combining separately functioning agitation means and injection means. The invention consists in supply granular metal material in a fusion vessel 11 having a weighing chamber 17 by a cylinder of required length communicating with a nozzle port at the extremity section, including rotatively an agitation means 21 inside, and wherein an injection means 22 whose extremity section is formed into an injection plunger 30 is inserted advanceably and retractably into the center section of this agitation means 21. The metal material is heat melted by an external heat. The molten metal material is accumulated in the fusion vessel by homogenizing by the agitation means 21.

Abstract: An electric discharge machining device comprises a base, a support column, an oil bath, a work platform, a draining pipe, and a linear actuator. The base has an oil storage compartment. The oil bath has a receiving space and a drainage hole through which the support column is put. The draining pipe is fitted over the support column such that one end of the draining pipe is connected with the drainage hole and that other end of the draining pipe is in communication with the oil storage compartment. The oil bath is actuated to slide up and down between an upper position and a lower position. When the oil bath is located at the upper position, the bath is filled with the process oil. When the oil bath is located at the lower position, the process oil is drained out of the oil bath into the oil storage compartment of the base.

Abstract: A rotary welding apparatus for joining two metallic workpieces together by forming a semi-circular weld at a semi-circular interface formed at mating surfaces of the workpieces. A turntable is rotated by a turntable drive. The turntable supports and indexes three lower tools around a circular path between a load station and a weld station. Each lower tool supports two workpieces to be welded together. A workpiece rotary drive connects to whichever of the lower tools is at the weld station then rotates that lower tool about a workpiece axis. A laser emitter supported adjacent the weld station directs a laser beam at a circular or semi-circular interface between respective mating surfaces of the two workpieces and welds the workpieces together as the workpiece rotary drive rotates them. The laser emitter is supported on a laser emitter mount near the weld station in a position directing a laser beam at the interface of the workpiece mating surfaces.

Abstract: Circuit modules are made by melting solder on a land by irradiating the solder with a laser beam, and then pressing an external electrode of an electronic component to the melted solder before the melted solder hardens.

Abstract: A device for machining a hole or a shape of varying profile in a mechanical workpiece using an excimer laser comprises a screen having an aperture of predetermined shape disposed between the excimer laser and a device for focussing the laser beam, the screen being movable in a plane perpendicular to the laser beam. Control means is provided for automatically controlling displacement of the screen in real time while the hole is being machined in the workpiece, the control being effected as a function of the number of pulses emitted by the excimer laser. As an alternative, the screen may be replaced by a diaphragm comprising variable-aperture shutters.

Abstract: A reworkable laser welding process for welding a first element to a second element.

Abstract: Apparatus (20) and a method for laser scribing a coated substrate (22) utilizes a rotating polygonal mirror (36) to split a pulsed laser beam (30) in order to provide spaced ablations (34) in a coating (26) on the substrate. The laser pulses are directed through at least one lens (56, 60) and may be passed through fiber optics (62). A laser detector (68) may be used to detect the rotational position of the rotating polygonal mirror (36). A controller (76″, 76′″) allows a second set of scribes to be generated with reference to the first set of scribes.

Abstract: A method of manufacturing preform elements comprises the initial step of forming a preliminary component including a facing table of superhard material having a front face, a peripheral surface, and a rear surface bonded to a less hard substrate. The rear surface of the facing table and the front surface of the substrate are formed with inter-engaging projections and recesses to provide a non-planar interface between the substrate and facing table. There are then cut from the preliminary component a plurality of separate preform elements each having a facing table and substrate with a non-planar interface between them. The configuration of the non-planar interface of the preliminary component may vary with distance from its center, so that the non-planar interface of each preform element also varies in configuration across the width of the element.

Abstract: Spray atomization of molten metal and/or intermetallic matrix composites reinforced with ceramic particles is practiced by atomizing the matrix into micron sized droplets and depositing the semisolid droplets in a bulk deposition upon a temperature controlled substrate. The semiliquid droplets are injected with refinement particles while in a range of 0 to 40% by volume solid phase and deposited on the substrate surface while in a 40 to 90% by volume solid phase. Refined grain morphology, increased solid solubility, nonequilibrium phases, absence of macro segregation, and elimination of the need to handle fine reactive particles are all achieved by performing the spray deposition process under a controlled atmosphere. Materials fabricated by the process exhibit unusual combinations of properties, such as spatially varying properties.

Abstract: A method for the preparation of potassium salts of complex aluminum fluorides which can be used in particular as a flux in particular for soldering lightweight metallic materials. In the method a potassium compound is added to aqueous fluoroaluminic acid, and potassium cryolite or a substance mixture which contains potassium cryolite is added to the resulting suspension. The resulting product is then dried and can be used as a flux for soldering lightweight metallic materials, especially aluminum.

Abstract: An electric wire pressure welding apparatus and pressure welding method capable of exactly specifying the end of an electric wire in a solderless connector and capable of pressure-welding wires from above and below the connector, wherein a wire chuck has a wire holding portion and a pair of wire guide portions projecting from the wire holding portion in a wire-longitudinal direction and having an inner distance larger than a wire diameter for enabling a wire end portion to be disposed between the pair of wire guide portions through which a wire pressure welding blade can go, and wherein the wire guide portions are positioned against a solderless terminal and location of a wire tip is specified by bending the wire end portion about the front end of the wire holding portion in a pressure welding direction by pushing the wire end portion by the wire pressure welding blade.

Abstract: The invention relates to a cylinder liner, cast into a reciprocating piston engine, of a highly hypereutectic aluminum/silicon alloy which is free of hard material particles independent of the melt and has such a composition that fine primary silicon crystals and intermetallic phases automatically form from the melt as hard particles. By spray-compacting, a blank of finely sprayed melt droplets is caused to grow, a fine distribution of the hard particles being produced by controlled introduction of small melt droplets. The blank can be transformed by an extrusion step into a form approximating the cylinder liner. After subsequent premachining with chip removal, the running surface is precision-machined and subsequently honed in at least one stage, after which the hard particles located in the running surface are exposed, plateau faces of the particles being formed, which faces protrude from the remaining surface of the matrix structure of the alloy.

Abstract: A method of producing copper powder having little variation in its particle size and an excellent monodispersion properties. A copper complex ion solution is prepared from a copper-containing solution and a complexing agent, then a reducing agent is added to the copper complex ion solution to precipitate metallic copper. The copper-containing solution herein contains copper sulfate, copper formate, copper pyrophosphate, copper chloride or copper carbonate and the complexing agent is at least one carboxylate or phosphate.