Abstract: A multi-dimensional bending apparatus is disclosed, wherein the entire length of the product is divided into a plurality of imaginary segments which are identified by detecting the continuously supplied length of an elongate material. The material is bent multi-directionally by a bending device including horizontal and vertical bending mechanisms and an axial twisting mechanism, which are individually actuated in response to the detected supplied length of the material. Multi-dimensionally bent, continuously supplied material is cut into the length of the product by means of a cutting device also actuated in response to the detected supplied length of the material, the cutting device including fixed and movable blade members which, during the cutting operation, are movable also in the direction in which the material is supplied.

Abstract: A multi-dimensional bending method and apparatus are disclosed, wherein the entire length of the product is divided into a plurality of imaginary segments which are identified by detecting the continuously supplied length of an elongate material. This material is bent multi-dimensionally by a bending device including horizontal and vertical bending mechanisms and an axial twisting mechanism having the respective actuators arranged remote from the movable elements of the mechanisms, and individually actuated in response to the detected supplied length of the material. Multi-dimensionally bent, continuously supplied material is cut into the length of the product by means of a cutting device also actuated in response to the detected supplied length of the material, and includes fixed and movable blade members which, during the cutting operation, and movable also in the direction in which the material is supplied.

Abstract: An apparatus for the manufacture of a root canal reamer and a method of manufacture of the same. An apparatus for twisting reamer material has a triangular or rectangular cross-sectional opening, a chuck portion holding root part of taper-like reamer material and vice composed of a plurality of vice-claws capable of pressing side faces of reamer material while rotating. The distance between vice-claws and chuck is variable. The vice-claws adjacent to said vice are arranged alternately and are able to be moved back and forth in accordance with thickness of reamer material. The inside opening of vice varies corresponding to the sectional taper of the reamer material. The present invention also discloses a method of manufacturing a reamer which has an enlarged rake angle and a smaller relief angle than conventional reamers. This is accomplished by an inside opening dimension of the vice being a little larger than the sectional figure of the reamer material.

Abstract: A method and apparatus for manufacturing the screw flight section of a screw conveyor is disclosed. The apparatus includes two horizontal arms which extend from a vertical support and at the terminal end of these arms there are dies for engaging the inner and outer peripheral edges of a flat, sheet metal, annulus-shaped blank with a radial slit. One die is turned on its longitudinal axis while the other remains stationary so that the blank is twisted. After the blank is circumferentially displaced relative to the dies, it is again twisted in the above described manner. This procedure is repeated around the entire circumference of the blank with the result that a helical form is applied to the blank.

Abstract: A torsional molding apparatus for arranging each crank pin of a crank shaft at a predetermined angular position wherein a plurality of crank pins are arranged on the same plane passing through an axis of the crank shaft. The apparatus comprises posts on a fixed support bed, a vertically movable cushion bed, a vertically movable bed arranged above the cushion bed, a fixed lower mold and a fixed upper mold secured to the cushion bed and vertically movable bed, respectively, a rotatable lower mold and a rotatable upper mold rotatably carried on the cushion bed and vertically movable bed rotatably about the axis of the crank shaft, and arms integrally and outwardly projected from the rotatable lower mold and placed in abutment with the upper ends of the posts.

Abstract: A method of manufacturing a spiral tube including the steps of positioning an elongated mandrel within a tube, grasping the ends of the tube, forming a point of reduced resistance to torsional force in the wall of the tube, rotating one end of the tube while the other end is held stationary to cause the formation of a spiral groove in the tube, the mandrel defining the minimum interior diameter of the spiral tube so formed, and advancing the means grasping the tube towards each other to compensate for the reduction of length of the tube as the spiral groove therein is formed, and maintaining at least the area of the tube at which the spiral groove is being formed at an elevated temperature.

Abstract: The method of making a propeller and fan blading comprised of an extruded airfoil having a rib retained at the root for mounting and with a portion thereof removed by flattening the back of the blade truncating the back camber thereof in a plane tapered toward the blade tip with respect to the front camber thereof and having a flap of full configuration toward the root of the blade and continuing tangent from the front camber and extending angularly back from the back camber and reduced toward the blade tip by profiling the trailing edge made thin toward said tip by a flattening truncating the back trailing portion of the blade toward said tip.

Abstract: A metal cap or closure having a smooth, rounded edge. The smooth, rounded edge is formed by contacting the rough edge of the cap or closure with a plurality of moving metal spheres. The apparatus for forming the smooth, rounded edge includes a plate in which the spheres are rotatably mounted and a holder for holding the closure over the spheres so that the edge of the closure contacts the rotating spheres.

Abstract: An apparatus for cold forming stabilizer blades from elongated members by holding an elongated member while being bent or twisted to form a stabilizer blade. A mandrel is provided for receiving first and second sleeves so that a force applied by a toggle arrangement causes the first and second sleeves to rotate in opposite directions to bend the elongated member to form a stabilizer blade.

Abstract: An automated apparatus for forming helical corrugations in a cylindrical tube and comprising a tail stock movable in alternate forward and reverse directions, a head stock disposed in spaced relation with respect to the tail stock whereby the tube may be supported therebetween in a manner for rotating one end of the tube about its own longitudinal axis while holding the opposite end against rotation for twisting the wall of the tube to form the corrugations, a sensor device for detecting the progression of the corrugations along the length of the tube whereby forward movement of the tail stock and forward rotation of the head stock is stopped in accordance with a predetermined position in the twisting operation and the tail stock and head stock are actuated in reverse directions for a controlled unwinding and stretching of the twisted tube, a first sensor device responsive to the reverse movement of the tail stock for releasing the engagement of the twisted tube for permitting removal of the tube from the app

Abstract: Helically corrugated tubing with corrugations of variable depth is manufactured in a twisting machine by rotating one end of a deformable tube relative to the opposite end and simultaneously applying axially directed forces to the tube to progressively develop the helical corrugations in the tube wall. The depth of the corrugations is varied by means of a tapered mandrel which is located within the tube while the corrugations are being formed. Tubing sections with variable depth corrugations define flow paths in which the effective cross sectional area varies correspondingly, and such sections are useful in various heat exchangers.

Abstract: A part such as a long concrete drill provided initially with rectilinear splines is heated in successive zones while producing a controlled increase in the distance between the two extremities. The part to be formed is thus subjected to controlled plastic elongation while the two extremities are driven in rotation at different speeds in order to subject the splined portion to a twisting effort and thus to convert the rectilinear splines to helical splines.

Abstract: Helically corrugated tubing with corrugations that have a gradually changing pitch from one end to the other is manufactured in a twisting machine by rotating one end of a deformable tube about the tube axis relative to the opposite end and simultaneously applying axially directed forces to the tube to progressively develop helical corrugations along the tube wall. The ratio of the torque and the axially directed forces applied to the tube is continuously varied to produce corresponding variations in the pitch of the corrugations. Tubing sections in which the pitch of the corrugations increases gradually from one end to the other are used in shell-and-tube or tube-in-tube heat exchangers and define flow paths having cross sectional areas which increase correspondingly.

Abstract: Helical corrugations are formed in a tube having a cylindrical wall by generating pressure radially of the unsupported tube wall at localized areas distributed around the tube circumference. While the radial pressure is being generated, twisting of the tube about its own axis is initiated and as a result, radial deformation of the unsupported tube wall takes place. By controlling the axial length of the tube while it is twisted, the radial deformations develop into flutes which grow axially along a selected helical path in the tube wall.

Abstract: A machine for twisting and bending of elongated metallic strips which takes the form of a base upon which is mounted an elongated member of polygonal cross-section. A first holder is fixed to one end of said elongated member with a second holder being slidably mounted upon said elongated member adjacent the free end thereof. Within the first holder is located a first grasping means. Within the second holder is located a second grasping means. An elongated metallic strip is to be fixedly secured at each end thereof to said first grasping means and said second grasping means and to be positioned in a taut manner therebetween. A biasing means is included within said second holder with said second grasping means moving against said biasing means. A torque applying means attached to said first grasping means. Upon rotational movement of said torque applying means a uniform twist is established along the length of the metallic strip.

Abstract: A machine bed supports stationary and rotary fixing means that are aligned for receiving bar stock therebetween. Electrical or electromechanical control means are provided for selecting and effecting, via a motor-driven step-down gear, exactly a predetermined amount of rotation of the rotary fixing means. Various detachable matching pieces hold opposite portions of the bar stock within the stationary and rotary fixing means, respectively, while the material is worked. Openings in the matching pieces positively fit the bar stock. The outer contour of the matching pieces permits insertion in the stationary and rotary fixing means for positive fit therein. A preferred embodiment of the apparatus serves the purpose of cold twisting square steel bars either singly or, for obtaining volutes, in bunches. Removal of worked bar stock is facilitated by a handwheel enabling the operator to manually counter-rotate the rotary fixing means by a selected small angle.