摘要:
In order to quickly and economically evaluate cleanliness of a metal with high representativity when quantities, compositions, etc., of non-metallic inclusion particles existing in a metal and resulting in product defects are evaluated by a sample collected during the production process of the metal, the present invention provides an evaluation method involving the steps of levitation-melting a metal piece for a predetermined time by cold crucible levitation-melting means, discharging non-metallic inclusion particles contained in the metal piece to the surface of a molten metal, and directly analyzing a curved and non-smooth sample surface after solidification by dissolving the surface and extracting and filtering the inclusions to measure or analyze the quantities of elements constituting the non-metallic inclusion particles and to determine quantity of the non-metallic inclusions.
摘要:
In an audio reproducing apparatus, when an information button is depressed during reproduction of a compressed music piece file, a control portion issues an instruction to reproduce a music piece information audio file associated with the compressed music piece file from a management information file. After completion of the reproduction of the music piece information audio file, it is confirmed whether or not the reproduction of the music piece is completed. When the reproduction of the compressed music piece file is completed, an operation is completed.
摘要:
A soldering method wherein a high-energy beam such as a laser beam is projected onto different lead terminal arrays of electronic components, the beam being projected in a scanning manner a plurality of times two-dimensionally and continuously is described. The invention further relates to a soldering apparatus comprising a mechanism for holding an electronic component by the tip thereof, a rotary drive mechanism (27) which turns the electronic component holding mechanism so that the position of the electronic component in the rotational direction is brought into agreement with a practical mounting position on the circuit board, holding unit-drive mechanisms (21, 22, 25) that move the electronic component-holding mechanism three-dimensionally, beam radiation mechanisms (41, 42) for irradiating the surface of the circuit board with high energy, beam radiation angle change mechanisms (53, 54) for changing the radiation angle of the high-energy beam emitted from the beam radiation mechanisms relative to the circuit board, and a beam scanning controller (47) which controls the beam radiation angle change mechanisms such that the high-energy beam scans a predetermined lead terminal array of the electronic components mounted on the circuit board a predetermined number of times. Using this apparatus, the soldering is effected under conditions where the temperature rise near the lead terminals and the temperature distribution are made uniform.
摘要:
In order to quickly and economically evaluate cleanliness of a metal with high representativity when quantities, compositions, etc., of non-metallic inclusion particles existing in a metal and resulting in product defects are evaluated by a sample collected during the production process of the metal, the present invention provides an evaluation method involving the steps of levitation-melting a metal piece for a predetermined time by cold crucible levitation-melting means, discharging non-metallic inclusion particles contained in the metal piece to the surface of a molten metal, and directly analyzing a curved and non-smooth sample surface after solidification by a fluorescent X-ray analysis method using an energy dispersion type spectroscope, or by other chemical or physical measurements, to measure or analyze the quantities of elements constituting the non-metallic inclusion particles and to determine quantity of the non-metallic inclusions.
摘要:
Oxygen or a mixed gas containing oxygen, or a chemical flame produced by a mixture of a combustion gas and a combustion-assisting gas containing oxygen, is blown against the surface of molten iron to cause radiation emission. The radiations are divided into components of different wavelengths, and the resulting emission spectra are measured to determine the composition of the molten iron.
摘要:
In order to quickly and economically evaluate cleanliness of a metal with high representativity when quantities, compositions, etc., of non-metallic inclusion particles existing in a metal and resulting in product defects are evaluated by a sample collected during the production process of the metal, the present invention provides an evaluation method involving the steps of levitation-melting a metal piece for a predetermined time by cold crucible levitation-melting means, discharging non-metallic inclusion particles contained in the metal piece to the surface of a molten metal, and directly analyzing a curved and non-smooth sample surface after solidification by a fluorescent X-ray analysis method using an energy dispersion type spectroscope, or by other chemical or physical measurements, to measure or analyze the quantities of elements constituting the non-metallic inclusion particles and to determine quantity of the non-metallic inclusions.
摘要:
An optical path rotating device, disposed in front of a linear array laser diode having a plurality of long and narrow and linearly arranged emitters for emitting a group of laser beams in the form of a dotted line, the optical path rotating device being able to convert the laser beams from the emitters into laser beams lined up in the form of ladder rungs by receiving the group of laser beams collimated by being refracted in a direction substantially perpendicular to the direction of the dotted line, rotating the positions of the laser beams from the emitters substantially for a right angle, and emitting the laser beams, and a laser apparatus, which uses the optical path rotating device, for collimating the substantially rung-shaped laser beams into two directions independently, bringing the laser means into focus, thus increasing the density of the laser energy at the focus.
摘要:
This invention relates to a process for enriching carbon 13 by mixing a halogenomethane containing one or more fluorine atoms and carbon 13 of natural isotopic abundance with one or two or more additive gases selected from a group of oxygen-containing oxidizing agents, halogens, and hydrogen halides, irradiating the resulting raw material gas mixture by a carbon dioxide laser to cause selective dissociation and reaction of the halogenomethane of carbon 13, separating the unchanged substances from the reaction mixture to obtain a product enriched with carbon 13, further converting the enriched product to carbon monoxide, and enriching carbon 13 by low-temperature distillation of the carbon monoxide. The process has advantages of low overall energy consumption, high yields of carbon 13, easy separability of the unchanged substances and high degrees of carbon 13 enrichment.