Abstract: A process for controlling a ratio of load distribution among a plurality of rolling stands to roll a work progressively comprises storing, when a ratio of load distribution between a stand located at the most downstream position with respect to a travelling direction of a work and one or more selected stands located on the upstream side is different from a desired preset value therefor, an error and rolling conditions of the individual stands at that time, and storing controlling amounts of the control which was performed to correct the error as coefficient values and then using the coefficient values for determination of controlling amounts upon correcting control in the same conditions thereafter.
Abstract: A roll stand has a frame in which upper and lower working rolls are journaled for rotation about respective parallel upper and lower working-roll axes and defining a workpiece nip. Respective upper and lower backup-roll guide elements vertically flank the working rolls and are each at least partially vertically displaceable relative to the frame. Respective upper and lower backup-roll journal blocks are axially displaceable but vertically fixed relative to the guide elements and define parallel upper and lower inner axes flanking the working axes. Respective inner backup rolls are journaled in the blocks for rotation about the inner axes and bear radially toward the nip on the working rolls. The inner backup rolls are therefore axially displaceable in the guide elements. A pair of outer backup rolls are journaled in the frame for rotation about outer axes coplanar with the respective inner axes and bear radially toward the nip on the inner backup rolls.
Abstract: A wheel supported mobile log splitter has an elongated frame supporting a stationary wedge-shaped log splitting element and an opposing movable ram which is connected to the piston rod of a hydraulic cylinder mounted on the frame. The cylinder is supplied with high pressure hydraulic fluid by an engine driven pump which receives fluid from a hydraulic reservoir associated with the frame and is also connected to the reservoir by a line having a high pressure relief valve. Hydraulic fluid is exhausted from the cylinder and returned to the reservoir through a pair of control valves which are coupled together and actuated simultaneously to provide for rapid return of the ram and for minimizing the cycle time to split a log.
Abstract: The system according to the invention comprises: stand-bearing trolleys capable of independent displacements in the longitudinal and transverse directions, each constituted by two longitudinal members on which the stand is fixed and supported by axle-less wheels driven by on-board motors and by two transverse members supported by axle-less wheels driven by on-board motors; longitudinal and transverse tracks connecting the rolling sites, the siding sites and the pre-assembly sites; intersections of tracks; counter-rails disposed vertically on either side of the tracks; hydraulic jacks serving to fix the stands on the trolleys and for lifting the stands for adjusting the level of the rolling plane; bed plates upstream and downstream of the rolling sites serving to lock the stands in rolling position; on the rolling sites, coupling hooks serving for the precise positioning of the stands in rolling position and where necessary for the displacements of the stands during rolling, to bring different passes into the
Abstract: Horizontal supporting rolls disposed at a lateral side of the work rolls support the work rolls in the direction of travel of the rolled material, and horizontal back-up rolls disposed at a lateral side of the horizontal supporting rolls back-up the horizontal supporting rolls. Frames rotatably hold the horizontal supporting rolls and the horizontal back-up rolls at both axial ends of these rolls, and a first driving mechanism causes a movement of the frames in the direction of travel of the material to be rolled and to impart to the work rolls desired pressing force acting in the direction of travel of the rolled material. A second driving mechanism restrains the position of the frames thus setting the work rolls at predetermined offset positions, provided on the face of the housing confronting the holding means and adapted to guide the movement of the holding member in the direction of travel of the rolled material.
Abstract: Upper and lower reducing rolls are mounted within a mill housing for rotation about their axes and for parallel movement. Actuating cylinders force the upper reducing roll downward toward the lower reducing roll to effect a separation force on a workpiece that is placed therebetween. Four direct drive motors, one directly coupled to each end of the upper and lower reducing rolls, counter-rotate the reducing rolls to drive the workpiece therebetween. The motors are synchronized within a close tolerance of a set speed to prevent torsion of one end of the reducing rolls relative to the opposite end. Preferably, the rolling mill includes closely enclosed backing rolls engaging the reducing rolls to prevent deflection of the reducing rolls under load. This allows the rolling mill to produce a flat workpiece over a wide range of separation forces by means of cylindrical reducing rolls.
Abstract: A method for controlling the shape of a cold-rolled material which is capable of switching the roll coolant from a hot coolant to a cold coolant without changing the cooling capacity. The cold coolant is switched to a hot coolant as soon as the supply of hot coolant reaches a maximum flow rate and the flow rate of the cold coolant is controlled to be a value which gives a cooling capacity equivalent to that of the work roll by the hot coolant.
Abstract: An apparatus for planing opposite sides of a workpiece has a housing having a lower part and an upper part flanking a passage through which the workpiece to be planed is passed horizontally in a travel direction. Respective upper and lower planing drums rotatable on the respective housing parts above and below the passage about respective upper and lower axes extend transverse to the direction and define on rotation respective upper and lower cutting orbits centered on the respective axes. The lower drum is upstream of the upper drum relative to the workpiece travel direction. A stationary workpiece support table between the drums has an upper surface level and tangent with the lower orbit. Thus the underside of a workpiece passed in the direction over the lower drum is planed and slides downstream of the lower drum on the table surface.
Abstract: In rolling metal foils, such as aluminum foils, especially very thin foils in the range down to 10 .mu.m, an improved uniformity of the foil thickness over the width of the foil sheet and, simultaneously, greater rolling speeds of the foil sheet are obtained by operating the rolling apparatus at a working point of the rolling force/material-working or line force/deformation characteristic curve which lies below the saturation region in which, while the material-working or deformation is nearly independent of the rolling or line force, the rolling or pulling speed is determined by other parameters and can not be varied. The thickness variations occurring under this selection of the working point and due to variations in the rolling or line force over the width of the rolls are compensated by regulating the rolling or line force such that the thickness reduction is constant over the width of the sheet or has a desired profile of variation.
Abstract: A control for a folding flap of a folding cylinder in a folding machine of a rotary printing machine wherein a counterflap is adjustable with respect to a folding blade to a thickness of paper being processed, the folding flap being controlled by a closed cam, includes a roller lever formed of a first part mounted on a journal of the folding flap, and a second part bearing a cam roller, the first and second parts being adjustable with respect to one another for changing the angular position of the folding flap so as to vary a spacing between the folding flap and the folding blade.
Abstract: A method of operating a rolling mill in a manner that avoids the occurrence of alligatoring in a slab of metal as it is reduced in thickness in the mill. The slab is subject to a schedule of repeated passes through the mill to effect a predetermined amount of reduction in thickness of the slab in each pass. The method comprises the steps of analyzing the pass schedule of such a slab, and noting any pass in the schedule that has a combination of entry gauge and reduction draft that may subject the slab to alligatoring. An untapered nose of the slab is next presented to the bite of the mill, and if the combination of entry gauge and reduction draft is one that is not subject to alligatoring, the slab is passed through the mill to reduce its thickness as scheduled.
September 12, 1985
Date of Patent:
September 2, 1986
Aluminum Company of America
John A. Ballantyne, William L. Otto, Jr.
Abstract: Apparatus for bending a light gauge, profiled, metal panel to a curved shape, including an anvil mounted on a frame and having a part-annular surface, an arm mounted for pivotal movement about the center of curvature of the part-annular surface, a roller carried by the arm at a position spaced from the center and rotatable about its own axis, so that it can roll in an arc adjacent the annular surface, a mandrel carried by the arm for movement therewith at a location between the roller and surface, the mandrel comprising a plurality of blocks each having its length parallel to the roller axis, the blocks being juxtaposed in side-by-side relation and each shaped to conform to the profile of the panel to be bent, and at least one flexible element passing through all of the blocks and loosely holding them in juxtaposed relation, but allowing slight relative movement whereby, in use, with the mandrel engaged in the profile of a panel to be bent, the mandrel acts as a shape retaining member for the profiled panel,
Abstract: A dovetail fixture for clamping and holding two workpieces and for guiding a cutting tool whereby mortises are cut in one workpiece and tenons are concurrently cut in the other workpiece. The fixture includes a guide template having a plurality of spaced apart fingers formed along at least one edge of the template and defining blind-ended spaces between its adjacent fingers. As the cutting tool is moved along the edge of the template having the fingers, mortises are cut in one workpiece and tenons are cut in the other workpiece.
Abstract: In a wire working machine particularly one for forming torsion springs, an improvement that enhances the flexibility of the machine. The machine includes a wire former operable at the work station in response to the machine cam shaft and operable over a predetermined forming period. A wire winder is included also operable at the work station and operable in response to the cam shaft over a predetermined winding period. An improved gearing arrangement is provided intercoupling the cam shaft and the wire winder and figured to provide, during a full cam shaft rotation, different intervals of the predetermined forming and winding periods, respectively.
Abstract: A method and apparatus for controlling the gauge of a product, such as for example a rod or bar, as the product is passing from an upstream roll stand to a finishing block. The product is rolled under tension between successive sizing stands arranged between the upstream roll stand and the finishing block. Variable loops are introduced in the product between the upstream stand and the first sizing stand as well as between the second sizing stand and the finishing block. Cross sectional dimensional measurements are taken of the product emerging from the second sizing stand, and signals representative of such measurements are employed by a controller to vary the product tension between the sizing stands in order to correct off gauge conditions in the product emerging from the second sizing stand.
Abstract: A tree harvesting device for removing the limbs of a felled tree is provided that includes a unique delimbing blade assembly for cutting tree limbs flush with the trunk of a felled tree. The delimbing blade assembly includes a plurality of concave delimbing blades positioned about and defining a center axis. The blades are pivotally mounted on blade support arms. The support arms are shiftable through arcuate paths of travel for urging their respective blades into self-centered, cutting engagement with the trunk of a tree to be delimbed.
Abstract: Disclosed is a template for forming tapered sliding dovetail joints. The template is particularly useful for making tapered sliding dovetail joints using powered hand tools, such as a router. The template has a longitudinally extending groove which is narrower at one end than at the other. To form a sliding dovetail groove, a workpiece is placed underneath the template, and a dovetail cutter is passed along the sides of the groove. The template also has two longitudinally extending grooves which are tapered towards each other. To cut a sliding dovetail tongue, the end of a workpiece is placed below the template so the edges of the workpiece are exposed through the grooves, but the middle of the workpiece is covered by the template. A dovetail cutter is passed along the sides of each groove, creating a dovetail tongue. The template may also be secured to a dovetailing jig, to provide secure alignment and holding of the workpieces against the template.
Abstract: A veneer lathe apparatus is described with a powered nose bar roll of large diameter that is capable of peeling logs down to an extremely small core diameter on the order of about 21/2 inches for soft wood. The large diameter nose bar roll prevents jam-up of wood chips and trash at the junction between such roll and the log and greatly increases cutting time between lathe knife sharpenings. Both ends of the nose bar roll are connected through flexible couplings of plastic to the output shafts of two separate drive motors. The nose bar roll may be provided with a grooved outer surface for greater friction and can apply up to 40 percent of the total torque required for rotation of the log and to pressure the log for compression of its surface in front of the lathe knife during peeling. The nose bar roll is of larger diameter than the minimum log core and preferably such diameter is at least fifteen times the thickness of the wood veneer being peeled.
August 7, 1984
Date of Patent:
July 29, 1986
The Coe Manufacturing Co.
Robert A. Browning, Jr., Leonard L. Hayes
Abstract: A pipe mold for centrifugally casting pipe is disclosed. The pipe mold according to the present invention is made by depositing weld material on a rigid shell. The rigid shell is obtained by forming a flat plate into a cylinder and welding the resultant seam. Additional rigid shells can be circumferentially welded together to obtain a desired length. The welded seams are areas of weakness called metallurgical notches. To eliminate the metallurgical notches, weld material is deposited on the shell. In one embodiment, weld material is deposited on the outside of the shell. The shell then is machined away. The resultant pipe mold has a total wall thickness comprising weld material and is free of metallurgical notches. In addition, the need for furnace heat-treatment to achieve properties in the weld material can be eliminated.
Abstract: A pencil sharpener which includes a sliding safety shield preventing operation of the sharpener with the pencil drawer removed and further preventing a pencil to be inserted into the sharpener so as to actuate the cutter assembly unless the shavings drawer is in its fully closed position. In addition a stop for a positive stop of the sharpening process is provided in transverse relation to the cutter assembly aperture so as to impinge upon the cutter assembly and stop the cutter assembly at a zero clearance position with a holder therefor, so as to prohibit the formation of a burr or other irregularity on the pencil point.