摘要:
Generally trapezoidal web sections of non-uniform shape for fabricating structural I-section beams having varying bending modulus are cut from rectangular plate stock pieces by a shear whose platen is oscillated, as a series of pieces are cut from a length of metal sheet or plate, about an axis perpendicular to the plane of the stock material. The platen angle is determined and controlled by a computer to which design criteria are fed.
摘要:
A strip welding machine for butt-welding cut surfaces of a strip beginning and a strip end of metal strips to be connected is described. The welding seam is manufactured with a laser welding head. In order to obtain a plane and parallel and gap-free butt joint of the cut surfaces, two separately mounted cutting tools are provided. Each cutting tool has an upper knife and two lower knives, wherein each upper knife is moved virtually without a gap between the two lower knives. Consequently, the cut surfaces at the strip end and the cut surfaces at the strip beginning of the metal strips to be connected are manufactured with equal cutting forces, so that dimensional inaccuracies cannot occur.
摘要:
A programmable controlled turnblanking machine comprising a blanking apparatus having a pair of blank dies each provided with a cutting edge and disposed in a strip feed direction on a bed to cut out blanks of predetermined shape and size from a strip by means of the cutting edges of the blank dies, one of the blank dies being disposed in front in the strip feed direction and preventing from sliding in the strip feed direction, and the other blank disposed in the rear in the strip feed direction so as to be slidable on the bed in the same direction, both blanked dies being rotatably supported on the bed; a teaching unit for inputting a slide distance X of the rear blank die as well as rotational angles .theta..sub.1 and .theta..sub.2 of both front and rear blank dies and setting positioning data for the blank dies as program data; and a control box for automatically setting initial positions of the paired blank dies in accordance with a program based on the said program data set by the teaching unit and controlling blank cutting operations of the blanking apparatus automatically.
摘要:
A blanking shear machine has a rotatable upper turret having a holder for an upper blade. The upper blade has two contiguous sides which form a right angle therebetween. A rotatably mounted lower turret has a holder for a lower blade which corresponds to the upper blade. Means for clamping and positioning a workpiece are provided between the upper and lower turrets. The turrets are rotated to position the blades to provide the desired cut. A plurality of strikers are provided above the upper turret at four positions above the upper blade at which the contiguous sides of the blade are aligned with the X-axis and Y-axis coordinates. Means for actuating the strikers are provided to lower the upper blade to engage the lower blade, shearing the workpiece between the two blades.
摘要:
The overall arrangement of a number of non-overlapping rectangles with constraints on their size and shape, may be generated with relation to a number of objective functions such as, size and shape of the enveloping rectangle, size of an interconnecting network, and distance between pairs of individual rectangles, by first embedding a distance space, reflecting the desired proximity structure, in the plane; next, by refining containment relations, fixing the relative positions of rectangles within such a containment in accordance with the corresponding positions in the embedding; and on the basis thereof estimating the space required for the local realization of the interconnecting network in a configuration satisfying the constraints on the individual rectangles, and optimal with respect to any quasi-concave objective function on the dimensions of the enveloping rectangle that is monotone in its arguments. The method can be implemented even on relatively small computers. Its major application is in the generation of mask patterns of complex semiconductor integrated circuits, especially when a given functional structure must be preserved by containment in rectangles.
摘要:
Sheet metal shears are located at one end of a table over which sheet metal is moved toward the shears. A lateral stop of positioned along one of the table edges extending transversely of the shears. The table surface is inclined downwardly toward the lateral stop. Clamping members are located adjacent to and are movable along the edge where the lateral stop is located.
摘要:
A control mechanism for a paper cutting machine having a table for supporting a pile of sheets to be cut, cutting apparatus for operating it, a backstop mounted for movement along the table so as to position and advance the pile, and drive apparatus for moving the backstop along the table in either direction. A controller is electrically connected to the machine including a digital computer mechanism equipped to accept input information relating to the position of the back gauge and information from a keyboard and to store and process this information and retrieve it, and to provide input to control the drive according to desired programs. A keyboard and display are connected to the computer mechanism to operate the controller and display its action.
摘要:
A sheet metal shears for metal sheets and plates with a highly sensitive surface comprises: a sheet metal infeed platen with a lower blade secured to the edge thereof extending transversely to the direction of sheet advance; a sheet stop disposed in spaced relation from the lower blade in the direction of sheet advance; a movable top blade which in cooperation with the lower blade cuts sheet metal strips from the metal sheet which is advanced over the lower blade up to the sheet stop; and a support means for the sheet metal strips including a movable table which may be extended to support said strips prior to and during the cutting operation in a support plane which is a continuation of the surface of the sheet metal infeed platen and which may be retracted to enable the cut metal strips to fall vertically after they are cut from the sheet. The support table when extended prevents the free edge of the sheet which has been pushed beyond the lower blade from sagging downwardly due to the inherent weight of the sheet. The support table when retracted allows the strips to fall but does not scratch the undersurface of the strips as it retracts.
摘要:
An angle shears with two shear cutting members for cuts in two directions. The two shear cutting members are arranged to be moved independently of each other and have a divided drive. The cutting edges of the shear cutting members are arranged at small angles to the surface of the sheet metal to be cut.
摘要:
Two pairs of shears disposed at right angles and operable simultaneously, shear a sheet along intersecting lines simultaneously, the sheet being held and located by a powerdriven positioning carriage. Each blank is cut to finished size, and various operational modes are available.