摘要:
A grinding machine wherein a CBN grinding wheel is rotatably carried to grind a workpiece on a work support device and is provided with a re-truing device, in addition to a truing and dressing device rotatably carrying a truing roll and a counter roll. When a truing and dressing instruction is generated, the CBN wheel is first trued with the truing roll, is then dressed by free abrasive grain supplied between itself and the counter roll and is finally re-trued with a diamond impregnated truing bar carried on the re-truing device. A re-truing infeed of the truing bar against the CBN wheel is considerably less than a truing infeed of the CBN wheel against the truing roll, and therefore the re-truing is effected on cutting edges of the wheel abrasive grain damaged by the free abrasive grain in dressing, whereby the cutting edges are made somewhat dull.
摘要:
A music box toy comprises a music box contained within the toy, a movable appendage partially projecting externally of the toy, means for driving the appendage, and a connecting member for operationally connecting the appendage with the drive means. During playing time of the music box, the appendage is moved by the drive means. On the other hand, when the appendage is externally moved, the connecting member is adapted to move away from the drive means.
摘要:
An image generating apparatus includes: a lighting apparatus that emits illumination light to an imaging area where at least a part of an electronic component is located; an imaging apparatus that images the imaging area irradiated with the illumination light; and an image processing apparatus that processes a captured image obtained by the imaging. The image processing apparatus generates a before-adjustment image based on the captured image, generates an adjusted image by adjusting luminance of the before-adjustment image, and generates an optimal image by setting a difference in average luminance between a designated area and a comparison area in the adjusted image largest.
摘要:
A component presence/absence judging apparatus judges the presence/absence of a component through a registration step and an inspection step. The registration step comprises an ante-mounting color information acquisition step, a post-mounting color information acquisition step and an inspection area determination step. Ante-mounting color information is acquired from an ante-mounting image taken at a predetermined portion on an ante-mounting board. Post-mounting color information is acquired from a post-mounting image taken at the predetermined portion on a post-mounting board. Then, a section having a large difference between both color information of the ante-mounting image and the post-mounting image is identified and is determined as an inspection area. At the inspection step, the presence/absence of the component at a predetermined place on each inspection board to be inspected is judged in dependence on the color information on the determined inspection area.
摘要:
A method of forming a silicon oxide film, comprising the steps of: —providing a treatment substrate within a reaction chamber; —purging the gas within the reaction chamber by feeding an inert gas into the chamber under reduced pressure at a substrate temperature of 50 to 4000 C, —adsorbing, at the same temperatures and under reduced pressure, a silicon compound on the treatment substrate by pulsewise introduction of a gaseous silicon compound into the reaction chamber, —purging, at the same temperatures and under reduced pressure, the unadsorbed silicon compound in the reaction chamber with an inert gas, —at the same temperatures and under reduced pressure, introducing a pulse of ozone-containing mixed gas into the reaction chamber and producing silicon oxide by an oxidation reaction with the silicon compound adsorbed on the treatment substrate; and—repeating steps 1) to 4) if necessary to obtain the desired thickness on the substrate.
摘要:
An abnormality detection circuit detects abnormality relating to ground fault in secondary winding circuitry of transformer, non-grounding fault of transformer assembly casing or false connection of the AC power source to the transformer assembly in reverse polarity. An interrupter circuit turns a switch off in response to detection of the abnormality by the abnormality detection circuit to interrupt the supply of the AC power to the transformer. When the supply of the AC power is interrupted, the switch is connected to a restart circuit, whereupon the circuit is activated to allow a charging current to flow to a capacitor, which is connected in series in a drive current path of a drive circuit with a time delay on the order of 0.5 to 1.0 second which is determined by a delay circuit thereof. The charging current drives a restoring circuit, which controls the interrupter circuit to its restoring condition temporally so that the switch is turned to its “on” condition only once.
摘要:
A method for grinding a work having a cylindrical portion and a couple of shoulder portions extending at right angles from the opposite ends of the cylindrical portion, the method comprising the steps of:(a) rotating the work about the axis of the cylindrical portion;(b) rotating a cylindrical grinding wheel with a width smaller than the space between the shoulder portions of the work about an axis parallel with the axis of the cylindrical portion;(c) feeding the grinding wheel relative to the work along an oblique path inclined to one direction with respect to the rotational axis of the grinding wheel, thereby simultaneously grinding one of the shoulders and a contiguous cylindrical portion; and(d) feeding the grinding wheel relative to the work along an oblique parth inclined to the other direction with respect to the rotational axis of the grinding wheel, thereby simultaneously grinding the other one of the shoulders and the remainder of the cylindrical portion.
摘要:
A resinoid-bonded grinding wheel employing hard abrasives such as cubic boron nitride or diamond is formed with a support member made of a vitrified grinding wheel. The support member has sealing layers on the surfaces thereof for avoiding the penetration of coolant into the support member. A method for forming the wheel includes mounting a grinding element on a radial peripheral surface portion of the support member and applying a sealing layer to the remaining surface portions of the grinding element for preventing penetration of the coolant into the support member and generation of vibrations in the grinding wheel during operation due to rotational imbalance caused by the presence of coolant within the support member.
摘要:
A manufacturing process for a metal bonded grinding tool includes the steps of; (a) preparing a rim of porous material, (b) press-forming the abrasive grains in contact with the rim to a specified structural dimension, and (c) forcibly passing a chemical plating liquid through a contacting body of the abrasive grains and the rim obtained in step (b) for continuously making the metal precipitate on the surfaces of the abrasive grains and in the pores of the rim so as to uniformly and continuously bond therebetween in any grinding tool of desired dimension.
摘要:
A method of forming a silicon oxide film, comprising the steps of: providing a substrate into a reaction chamber; injecting into the reaction chamber at least one silicon containing compound where the at least one silicon containing compound is bis(diethylamino)silane; injecting Oxygen into the reaction chamber and at least one other O-containing gas selected from ozone and water; reacting in the reaction chamber by chemical vapor deposition at a temperature below 400 C the at least one silicon containing compound and the at least one oxygen containing gas in order to obtain the silicon oxide film deposited onto the substrate.