摘要:
In a TIG welding process with controlled welding current pulses, DC current pulses with the frequency set at from tens to hundreds Hz (most preferably from 30 to 300 Hz) are fed to an electrode and current pulses are also fed to a filler wire so that an arc is caused to swing, whereby a large pool of molten metal can be maintained in a positive and stable manner due to the high arc pressure obtained when the welding current pulses at from tens to hundreds Hz is used.
摘要:
A TIG welding apparatus comprises; a twin electrode type welding torch 1 having a first and a second welding electrode 1a, 1b arranged approximately parallel and either side of an insulation plate of a predetermined thickness, and a main unit 2 which supplies to the first welding electrode 1a a first welding current varied at a first period F, and to the second welding electrode 1b a second welding current varied at the first period F and at an opposite phase to the variation of the first welding current. The main unit 2 superimposes a variation of a second period fm being shorter than the first period F, onto the first and second welding currents. As a result, the arc current is increased without increasing the welding current.
摘要:
A TIG welding apparatus comprises; a twin electrode type welding torch 1 having a first and a second welding electrode 1a, 1b arranged approximately parallel and either side of an insulation plate of a predetermined thickness, and a main unit 2 which supplies to the first welding electrode 1a a first welding current varied at a first period F, and to the second welding electrode 1b a second welding current varied at the first period F and at an opposite phase to the variation of the first welding current. The main unit 2 superimposes a variation of a second period fm being shorter than the first period F, onto the first and second welding currents. As a result, the arc current is increased without increasing the welding current.
摘要:
An ultraviolet ray curable ink jet composition of the present invention is characterized by being adapted to be ejected using an ink jet method and containing: a polymerizable compound; metal particles subjected to a surface treatment; and a substance A having a partial structure represented by the following formula (1), where R1 is a hydrogen atom, an oxygen radical, a hydrocarbon group or an alkoxy group, and each of R2, R3, R4 and R5 is independently a hydrogen atom or a hydrocarbon group.
摘要:
Provided is a light adjusting noise reduction circuit in which the vibration noise accompanying turning ON/OFF of a piezoelectric transformer. A full bridge circuit is controlled by a full bridge drive circuit so as to switch an input voltage (VB1) from an input voltage source and outputs it to a low pass filter. The output from the low pass filter is supplied to a piezoelectric transformer. The output current (IO) from the piezoelectric transformer is supplied to a discharge tube. Each of FET of the full bridge circuit has a drive frequency decided by a voltage control type oscillator. The full bridge circuit is connected to a duty variable circuit and a peak value control circuit. The peak value control circuit forms a rise and a fall of a waveform to be (1−cosωt).
摘要:
In each of an organic solvent, an oil-soluble dye and an oil-soluble resin to be contained in an ink for marking, and a resin adopted in an article to be marked with the ink for marking, it is necessary that absolute values of differences between mutual solubility parameters are not more than constant values, respectively.
摘要:
A track width regulating section having a track width, which is smaller than the resolution obtained by the wavelength of the light used for exposure and development of a resist, is formed between a lower core layer and an upper core layer. Since the width of the upper core layer is larger than the track width, magnetic saturation can be effectively reduced. Inclined faces are formed on the upper surface of the lower core layer so as to be inclined in directions away from the track width regulating section, thereby adequately preventing write fringing.
摘要:
An electromagnetic wave amplifier and an electromagnetic wave generator operate using electron beams in a vacuum environment. The amplifier, arranged in a vacuum environment, comprises an electron emitting section for emitting electron beams and an amplifying section for amplifying an inputted electromagnetic wave in one direction by utilizing energy received from an electron beam emitted from the electron emitting section and traveling in the vacuum along a dielectric waveguide having a wave-shaped form. The generator, also arranged in a vacuum environment, comprises an electron emitting section for emitting electron beams and an oscillating section for generating an electromagnetic wave by utilizing electron beams emitted from the electron emitting section and travelling in the vacuum along a dielectric waveguide having a composite wave-shaped form.
摘要:
A concentrated fixing solution which includes at least a thiosulfate, a water-soluble aluminum salt, and a compound having an absorbance of from 0.25 to 1.15 by a prescribed colorimetric method, and does not substantially contain a boron compound is disclosed. A method for processing a silver halide photographic material by using the concentrated fixing solution is also described.