摘要:
A numerical control apparatus can process a workpiece at high speed and high precision while suppressing tool abrasion by maintaining optimum cutting conditions determined by a combination of spindle rotational speed and tool feed speed. A spindle rotational speed control section changes the speed of the spindle according to a tool feed speed obtained by a tool feed speed deciding section based on the shape of the tool moving path commanded by a machining program. Alternatively, the spindle rotational speed is changed by a spindle rotational speed control section based on a change in the contact position between the tool and the workpiece to be cut in the tool axial movement direction. Further, the spindle rotational speed may be changed by the spindle rotational speed control section based on the tool feed speed including tool axial movement direction data obtained by a feed speed deciding section based on the shape of the tool moving path.
摘要:
Compounds represented by the general formula: [wherein R1 represents methoxy, ethyl, methylthio, etc., R2, R3 and R4 each represent hydrogen, a halogen, etc., R5 and R6 each represent —X5—X6—X7 (wherein X5 represents a single bond or —CO—, X6 represents a single bond, —NR3a, etc. and X7 and R3a each represent hydrogen, C1-10 alkyl, etc.), and Ar represents phenyl, pyridyl, etc.], salts thereof and hydrates of the foregoing.
摘要:
A thin and light webbing having a high strength per warp yarn unit, maintaining abrasion resistance, and using, as a warp yarn, a very strong polyester multifilament yarn for a seat belt made by fine single-yarn fibers. A yarn obtained by performing a twisting process of a high degree of twist is used as a warp yarn. The polyester multifilament yarn of fine single-fibers is essential to be woven at the maximum stretch ratio in a yarn making process to obtain a very-strong polyester fiber for a seat belt. A multifilament yarn and/or a monofilament yarn of polyester is/are used as weft yarns. By making the weft yarns and warp yarns cross each other so as to be woven in a belt like configuration, a webbing having a very high strength per unit of warp yarns, using low-cost base yarns, and maintaining abrasion resistance is obtained.
摘要:
A woven belt having thick and narrow portions with a breaking strength per unit width that exceeds the level of strength of conventional fabric straps and belts. One embodiment of the belt includes at least four layers of weave structure in which two outer layers are woven into a hollow tube by a common weft and the remaining inner layers are woven together by a second weft. The widthwise central area of the belt is provided with a thickness that is larger than a quarter of the belt width.
摘要:
Allyl alcohol is hydroformylated with a gaseous mixture of hydrogen and carbon monoxide, in an aromatic hydrocarbon, in the presence of a rhodium complex and a trisubstituted phosphine, to form hydroxybutyraldehydes which are separated from the reaction mixture within an aqueous medium. The carbon monoxide partial pressure, the rate of consumption of carbon monoxide, the rate at which the carbon monoxide is dissolved in the reaction mixture, reaction temperature and the viscosity of the reaction mixture are selected and controlled in an interrelated way to give a high yield of 4-hydroxybutyraldehyde and reduced catalyst consumption.
摘要:
An automatic heddling method and a related automatic heddling apparatus 100, by which a plurality of heddles 2 removed from a plurality of heddle frames 1 are integrally collected in such a manner that flat faces 11 of the heddles 2 may face opposite to each other, then a dummy yarn 4 is inserted simultaneously through heddle eyes provided respectively in the plurality of heddles 2 while they are in a collected state, and then the heddles 2 are individually carried with keeping the contact to the dummy yarn 4, from a collecting position 5 of the heddles 2 to a predetermined individual heddle frame designating means 6.
摘要:
A method for reproducing information recorded on a disc is provided. In the method, a reproduction signal is irradiated towards the disc to produce a corresponding read signal. Also, the reproduction signal is positioned at a first position within a non-program area of the disc and is attempted to be focused on the disc. If the reproduction signal is focused on the disc, the method determines if the read signal has a valid signal level. If the read signal does not have the valid signal level when the reproduction signal is positioned at the first position, the reproduction signal is moved to a second position within a program area of the disc while the reproduction signal remains focused on the disc. Then, the method determines if the read signal has the valid signal level when the reproduction signal is positioned at the second position. Also, a disc player that employs the method and a software program that instruct a controller to perform operations in accordance with the method are also provided.
摘要:
A disk drive apparatus reads information with high accuracy from an information read/write medium. Information recorded on the information read/write medium is optically read with a pickup, and in accordance with the read signal Sin, an RF signal generated by an RF signal generation circuit is supplied to a frequency characteristic compensation circuit to generate an RF signal having a compensated frequency characteristic. Here, the frequency characteristic compensation circuit 10 is an equalizer comprising a differential amplifier, fixed resistors, variable resistors, and variable capacitance element. Values of the variable resistors and the variable capacitance element are adjusted to variably adjust the frequency characteristic of the frequency characteristic compensation circuit.
摘要:
A creel 1 with twisting devices is capable of directly supplying twisted yarns from bobbins carrying non-twisted yarns to a loom or a warper, and of producing not only normal fabric but also a fabric having a low weft density woven at a higher rate or a fabric using hard-twist yarns as warps. A plurality of rotatable spindles 8, each carrying a bobbin 3 on which a non-twisted yarn 2 is wound, are arranged on a frame 18. The yarns 2 withdrawn from the bobbins 3 on the spindles 8 are twisted and arranged to form a yarn sheet 19. The spindles 8 are rotatably secured via bearings to the frame 18 of the creel 1 at the center of a rotary shaft section 8' which is arranged in a horizontal direction. On both ends of the rotary shaft section 8', a section for supporting the bobbin 3 carrying the non-twisted yarn 2 is formed, on which a two-for-one twisting device 21 is provided.