摘要:
A photon collimator, suitable for use in medical imaging equipment, is constructed from a block of photon-attenuating material, such as solid tungsten or molybdenum alloy that defines a plurality of integrally formed septa slats. Each slat has an elongated length dimension greater than thickness and depth dimensions, and is oriented in an opposed pattern array that is laterally spaced relative to its respective thickness dimension. An aperture channel is defined between each pair of opposed slats. Rows of integrally formed slats in one block or separately affixed blocks may be stacked on each other at skewed angles to form two-dimensional grids of apertures having polygonal cross sections. The slats may be formed by electric discharge or laser thermal ablation machining, such as by a sequential passing of an EDM wire cutting head along the pattern array, repeating sequential cutting of respective channel depth and width.
摘要:
A method and related apparatus for scoring a workpiece are disclosed. A first scoring die has a score section structured to score a workpiece in a predetermined pattern, a second scoring die having as a score section structured to score a workpiece in a predetermined pattern substantially identical to the predetermined pattern of the first score scoring die. In operation the method and apparatus align the first scoring die and second scoring die and score the workpiece from opposite sides to effect complete or substantially complete reduction of the workpiece in a predetermined path to define a part. The workpiece will generally be a sheet. The scoring dies will each have score sections having one surface configured to be substantially perpendicular to the longitudinal axis of the workpiece and an adjacent angularly disposed surface structured to be adjacent to the scrap being produced by the scoring operation.
摘要:
A forming method for applying a continuous punching to a chain roller includes a raw block having a first surface and a second surface. The raw block would be sequentially punched and formed throughout the first to sixth punching or throughout the first to seventh punching. During the fourth punching, a first blanking would be executed. Alternatively, before executing the sixth or the seventh punching, a second blanking would be implemented.
摘要:
A cutting arrangement for longitudinally cutting material includes two blades disposed across from one another and which cooperate during cutting. Each blade is embodied as a circular blade having a sharp cutting edge and supported by an adjusting or placement mechanism. During the cutting process, the circular blades are positioned by the adjusting or placement mechanisms so that the cutting edges overlap one another to form an overlap zone, the center of which coincides with the middle of the material that is to be cut. An adaptive control assembly includes individual drive motors for driving each blade and enables constant side load force control for each blade, such that side load pressures are adjustable in response to changes in web sped, web tension, and blade condition in real time. Automatic blade diameter sensors calculate the zero point of the cut, determine the appropriate blade speed and automatically set the overlap.
摘要:
In a shearing device (10), a plate-like work piece (50) is seated on a die (20) positioned on a lower side thereof is clamped by a pad (30), so that a predetermined portion of the work piece (50) is processed into a predetermined shape by a punch positioned on an upper side thereof. The punch (40) integrally has a heel portion (41). The heel portion is so as to broadly contact an outer peripheral face (51) of the predetermined portion to be processed of the work piece (50), thereby restraining the outer peripheral face (51) from moving in an outward direction perpendicular to a thickness direction.
摘要:
Methods and apparatuses for severing a wellbore tubular, the apparatus, in certain aspects, including: a first member movable toward a tubular to be severed; a second member with a second blade disposed opposite to the first member and movable toward the tubular; a first blade on the first member having a projection projecting from a center of a blade body with point structure on the projection for puncturing the tubular and cutting surfaces on the projection for cutting the tubular; and cutting surfaces, as needed, on the blade body adjacent the projection for cutting the tubular.
摘要:
Methods and apparatuses for severing a wellbore tubular, the apparatus, in certain aspects, including: a first member movable toward a tubular to be severed; a second member with a second blade disposed opposite to the first member and movable toward the tubular; a first blade on the first member having a projection projecting from a center of a blade body with point structure on the projection for puncturing the tubular and cutting surfaces on the projection for cutting the tubular; and cutting surfaces, as needed, on the blade body adjacent the projection for cutting the tubular.
摘要:
A cutting device includes: a cutter unit having a cutter blade; and a cutter operation mechanism which causes the cutter unit to carry out a circulatory movement including a cutting preparation operation which causes the cutter unit to advance toward a tape-like member from a cutting stand-by position to a cutting start position, the cutting operation which causes the cutter unit to move from the cutting start position to a cutting completion position, a withdrawal operation which causes the cutter unit to retreat from the cutting completion position to a withdrawal position, and a return operation which causes the cutter unit to return from the withdrawal position to the cutting stand-by position, wherein the cutter operation mechanism, in the cutting preparation operation, makes the cutting start operation different between a full cutting and a half cutting.