摘要:
The graphics input apparatus enables an operator to input a two or three-dimensional schematic figure into a computer simply by hand-writing a two-dimensioanl figure in a picture plane of a display device such as a cathode ray tube. The graphics input apparatus is provided with a display device, a memory, a position indicator for indicating predetermined positions in the picture plane of the display device, and a cursor display for displaying a cursor at the position indicated by the position indicator. Element inputting means displays a starting point at the indicated position of the cursor, assigning a specified node number to a node in the vicinity of the starting node if the node has not been specifically numbered, storing the node number in memory, displaying the elements at the position to which the cursor is moved by the position indicator, further displaying an ending point, assigning a specified node number to a node in the vicinity of the ending point if the node is not already numbered, storing the node number of the nodes in the vicinity of the ending point and making the memory store information on connection between the starting point and the ending point. Shape recognition means recognizes the shape of the elements in a predetermined manner.
摘要:
A curvilinear interpolation system and method for use in a numerical control apparatus such as a machine tool or a robot having two or more drive axes and movable while effecting linear interpolation on a given curve with a plurality of line segments. For each line segment a curvature K.sub.p of the curve is calculated at a current curve interpolating point P.sub.p, and a curvature K.sub.n calculated at a point P.sub.n on the curve spaced a given search length l.sub.S from the point P.sub.p along the curve. Then, a curvature K.sub.s is set equal to K.sub.p when K.sub.p .gtoreq.K.sub.n and set equal to K.sub.n when K.sub.p
摘要:
A power steering apparatus for turning a steerable wheel of a vehicle in response to steering operation by a driver. The apparatus comprises a hydraulic pump for pumping a fluid from a reservoir so as to supply pressurized fluid to a power cylinder formed in a gear housing through a direction control valve which is operable in response to rotation of the steering wheel for selectively delivering the pressurized fluid to pair of pressure chambers of the power cylinder. The apparatus further comprises an electric motor for rotating the hydraulic pump, an accumulator for accumulating the pressurized fluid discharged from the hydraulic pump, a detector for detecting the pressure of the pressurized fluid and for outputting a signal corresponding to the detected pressure, and a controller responsible to the signal from the detector for activating the electric motor only when the detected pressure is below a predetermined level. The hydraulic pump and the electric motor are mounted on the gear housing.
摘要:
A numerical control device for controlling a machine tool or a robot accepts a mixed program including both conventional G-codes and codes for nonuniform rational B-spline. The blocks of G-codes and rational B-spline codes are discriminated by a respective head code or symbol. Once a set of order, number of control points, and knot vector is input via code blocks of a program, the same setting for the B-spline basis functions is used for generation of the rational B-spline curves until a new set of order, etc., are input.
摘要:
A window combining device includes a window control unit for adding one window number to pixels on a window-by-window basis, a two-dimensional drawing engine for combining a drawn window including the pixels to which the window number is added by the window control unit into a display window, and a display control unit for displaying the display window into which the drawn window is combined by the two-dimensional drawing engine. When an update occurs in one of a plurality of drawn windows which construct the display window, the two-dimensional drawing engine computes an original background color from a pixel to which a blend flag showing that the pixel is a target for an antialiasing process is added, the pixel being included in pixels of the window for which the update occurs, and carries out the antialiasing process and recombines pixels into the display window.
摘要:
A numerically controlled system includes a tool path sample point setting unit for forming evaluation data by arranging, virtually, a tool on a given scheduled path locus to come precisely into contact with a processed surface of a processing object and by setting tool path sample points to evaluate a shape of the processed surface, a discontinuity portion extracting unit for extracting a discontinuity portion based on the evaluation data, and a tool position data forming unit including a command speed deciding portion for deciding a command speed at which the tool is moved based on the evaluation data and a tool position deciding portion for deciding the tool position based on the command speed and the shape of the worked surface such that the tool comes into contact with the worked surface, wherein setting of the tool path sample points, extraction of the discontinuity portion, and decision of the tool position are carried out in real time.
摘要:
An automatic programming apparatus comprises a machining unit preparing section for preparing plural machining units, a machining unit defining section for selecting a designated machining unit from the prepared machining units and designating the arrangement and size of the machining area of the selected machining unit, and an machined material creating section for creating a shape with the machining area shape removed from the material shape. The automatic programming apparatus and method for an NC machine which can easily create a machining program in complicated machining and also create a correct program quickly in complicated machining by trial and error.
摘要:
Minute spherical bismuth (III) oxide particles are produced by adding a monocarboxylic acid to an aqueous solution containing trivalent bismuth ions thereby inducing formation of a bismuth-monocarboxylic acid complex in the aqueous solution, further adding an alkali to the aqueous solution thereby inducing precipitation of the complex, separating the precipitated complex from the solution, and firing the separated complex.
摘要:
A numerical control system includes a curved-surface state evaluating unit for forming curved-surface evaluation data of evaluation points by arranging, virtually, the tool on a given scheduled path locus, that serves as the criterion of movement of a tool, to come into contact with a processed surface of a processing object, and by setting a plurality of evaluation points to evaluate the shape of the curved surface, a command speed deciding unit for deciding a command speed appropriately by using a passing speed and other data in the evaluation data, and a tool position data forming unit for calculating quickly a succeeding tool position by utilizing the evaluation data. The operations are performed in real time.
摘要:
A curved surface designing method comprises the steps of a first step of inputting edge shape data of n-sides of a curved surface, a second step of obtaining a regular n-sided polygon in a parameter space on the basis of the given data of n sides, a third step of calculating distance parameters on the basis of the regular n-sided polygon obtained by the second step, a fourth step of calculating blending values on the basis of the distance parameters, a fifth step of mapping an inner point D of the regular n-sided polygon onto the respective sides so as to calculate boundary parameters, a sixth step of calculating at least one of three-dimensional coordinate points, and, if necessary, tangent vectors, on sides which are boundaries of the curved surface on the basis of the boundary parameters, and a seventh step of calculating arbitrary points on the curved surface on the basis of the distance parameters, the blending values, the three-dimensional coordinate points of the respective sides, and, if necessary, the tangent vectors, of the respective sides.