摘要:
A double-action extrusion press obtains a tubular product, wherein the pressure-receiving surface area of a cylinder chamber on the side from which hydraulic oil is discharged from a container cylinder and the pressure-receiving surface area on the rod-side chamber of a piercer cylinder are set to be the same when a container moves in the extrusion direction, and the cylinder chamber on the side from which hydraulic oil is discharged from the container cylinder and the rod-side chamber of the piercer cylinder are connected by an oil pressure conduit and are in communication with each other when a billet is extruded from the extrusion stem after piercing has been completed.
摘要:
Provided is an apparatus of manufacturing a seamless pipe. The apparatus includes a container receiving a work therein, a stem pressing one end of the work within the container, a die installed in a direction opposite to the stem, and having an extrusion hole comprised of a plurality of ports, a rotation member installed on a front end of the die, having a stirring tip inserted into a joint surface formed by abutting a plurality of metal pieces to each other on one surface, and rotating to perform a friction stir bonding in a state in which the one surface contacts the joint surface, and a correction mold including a metal pipe discharging path receiving a metal pipe manufactured by the friction stir bonding and discharging the metal pipe to an outside.
摘要:
A method of making a composite tube-shaped fabrication member by providing in coils a first planar member suitable to form a flange of a tube-shaped fabrication member, two second planar members suitable to form web portions of a tube-shaped frame member, and two third planar members suitable to form a portion of a flange of the tube-shaped member, uncoiling the coils for first, second, and third planar members and passing them through accumulators, aligning the first, second, and third planar members adjacent respective side portions and attaching side portions of each planar member to respective side portions of adjacent planar members to form a composite intermediate product, and cold-forming to form a composite fabrication member of a desired shape.
摘要:
A method is disclosed for assembling a flattened tube multiple tube bank heat exchanger that includes a first tube bank and a second tube bank, each bank including a plurality tube segments extending longitudinally in spaced parallel relationship. A spacer clip is installed on a longitudinally extending edge of each heat exchange tube segment arrayed in a first layer of tube segments. A plurality of heat exchange tube segments are arrayed in a second layer in engagement with the spacer clips installed on the tube segments of the first layer.
摘要:
There is provided a high-strength steel tube having excellent chemical conversion treatability and excellent formability and a method for manufacturing the high-strength steel tube. More specifically, in processing a mother steel sheet containing, on the basis of mass percent, 0.05% or more C, more than 0.7% Si, and 0.8% or more Mn into a pipe shape, the sum total of absolute circumferential surface strains each applied in individual process steps of the processing is 5% or more as nominal strain. A welded steel tube thus manufactured using a steel sheet even containing more than 0.7% Si can have excellent chemical conversion treatability without mechanical grinding or chemical pickling treatment.
摘要:
The invention relates to a method for producing hollow profile-members having a longitudinal flange, wherein a plate which is arranged between the stamp and the first die being preshaped by introducing a stamp into a first die to form an U-shaped profile-member having a first member and a second member, and wherein the U-shaped profile-member being shaped with a second die to form an O-shaped profile-member having a longitudinal flange. In one aspect, the plate is preshaped to form the U-shaped profile-member, a longitudinal flange member portion is shaped in at least the first member and the longitudinal flange member portion is constructed during the shaping of the U-shaped profile-member to form an O-shaped profile-member substantially in a shape-retaining manner to form a portion of the longitudinal flange.
摘要:
A method for enclosing a heat pipe with metal is disclosed. The method includes the steps of: a) providing a tube made of a metal; b) putting the heat pipe in a hollow of the tube; and c) stretching the tube to shrink an inner diameter of the tube for tightly enclosing the heat pipe.
摘要:
A method for producing metallic sealing and stopper elements for flat gaskets by winding or rolling at least one metallic, sheet metal- or foil-like base body to obtain a tube as an intermediate product, bringing the mutually opposing end regions or parts, or the entire contact surface of the tube, into operative connection with each other by way of bonding, non-positive or positive joining techniques, or combinations thereof, contouring the tube or tube sections generated therefrom at least in some regions, and severing at least one annular or disk-shaped component in order to generate a sealing or stopper element in the contoured region of the tube or tube section.
摘要:
An endoprosthesis fabricated from multi-phase ferrous steel. Endoprostheses can include a variety of devices such as staples, orthodontic wires, heart valves, filter devices, and stents, many of which devices are diametrically expandable devices. Multi-phase ferrous steels include dual phase steels and transformation induced plasticity steels (TRIP steels).
摘要:
A method of roll forming a flat tube having a substantially θ-shaped section comprising the steps of forming a substantially triangular protrusion 72 having a roundish top, and closely attaching the opposed base end portions of the substantially triangular protrusion 72 having a roundish top while leaving a hollow portion 73a at the forward end of the protrusion 72, thereby forming a protrusion 73 having a closely-attached based end portion and forward-end hollow portion 73a.