45results about "Curved planar seam welding" patented technology

In the field of manufacturing container bodies by means of resistance seam welding machines, at least a disturbance variable is collected, particularly errors in cutting the metal sheet. Because of this collection of disturbance variables, at least a control variable is automatically changed in order to compensate or to diminish the influence of the disturbance variable on the welding seam quality.

A method for metallurgically joining a tube to a member. A tube is obtained having a longitudinal axis and having an end portion, wherein the end portion includes a fold, and wherein the fold includes longitudinally-spaced-apart first and second fold portions. A member (such as, but not limited to, a plate or a second tube) is obtained. The tube and the member are disposed with the end portion contacting the member. A resistance welding current path is created through the tube and the member proximate the end portion and the end portion is relatively longitudinally moved deformingly against the member creating a weld zone which includes at least some of the end portion and at least some of the member.

A process for producing a body for exhaust gas treatment having a plurality of metallic layers, includes bringing the layers into contact with each other in a connection region. A connection is made by a roller seam welding process in such a way that the layers form passages through which a gas stream can flow. A corresponding body for exhaust gas treatment can especially be used as a filter or catalyst carrier body in the automobile industry.

Applicant's invention includes an apparatus and associated method for precisely aligning two pieces of weldable material and welding the two pieces, the apparatus contains means for independently securing the two pieces of weldable material and for centering the junction of the two pieces in line with the welding electrodes.

The invention discloses a resistance welding process of a fluid reservoir of a compressor. The resistance welding process of the fluid reservoir of the compressor is used for projection welding synchronous rings of an upper case body of the fluid reservoir, a steel tube and a copper tube and connecting a lower case body of the fluid reservoir in a seal welding. The resistance welding process comprises the following steps that: S1, welding end of the steel tube is cold pressed in the shape of a horn; S2, welding end of the copper tube is cold pressed in the shape of a convex ring and inserted into the horn-shaped welding end of the steel tube; S3, the copper tube contacts with the end face of the horn-shaped welding end of the steel tube before welding and a gap is formed between the copper tube and the inner side of the horn-shaped welding end of the steel tube, a line contact is formed between the steel tube and the fluid reservoir of the compressor to suspend the steel tube inside the upper case body of the fluid reservoir; S4, pressure is exerted on working parts by medium-frequency direct-current resistance ring projection welding to discharge and fusion weld the copper tube and the steel tube and the steel tube and the upper case body, and to seal weld the upper case body and the lower case body by resistance seam welding. The resistance welding process is capable of welding the fluid reservoir, downsizing working space, saving technological process and solder, reducing cost and meeting structural requirements of the fluid reservoir with the steel tube inside and the copper tube outside.

Devices and methods are contemplated in which a first electrode is circumferentially movable about a second electrode such that a tubular work piece can be resistance welded to a second work piece. Most preferably, the first electrode is a wheel-shaped electrode, while the second electrode is static and disk-shaped.

A method and apparatus for manufacturing an exhaust pipe assembly for an engine which are capable of decreasing a temperature difference between a seam-welded outer surface and a seam-welded inner surface at the time of seam welding. An exhaust pipe assembly manufacturing apparatus 70 comprises an outer circumferential electrode wheel 71 abutted on an outer circumference of a mounting ring 41, a pressing means 102 pressing the outer circumferential electrode wheel 71 to the mounting ring 41, an inner circumferential electrode wheel 103 abutted on an inner circumference of a pipe 40 making up an exhaust pipe assembly 26, a transformer 104 serving as a voltage supply means for supplying a predetermined voltage to the outer and inner circumferential electrode wheels 71 and 103, and a controller 105 for control of voltage of the transformer 104. Thickness T1 of the outer circumferential electrode wheel 71 is formed larger than thickness T2 of the inner circumferential electrode wheel 103.

A seam welding system includes a pair of roller electrodes. The pair of roller electrodes hold a to-be-welded object between circumferential surfaces of the roller electrodes, rotate while holding the to-be-welded object between the circumferential surfaces, and perform seam welding on the to-be-welded object when a current flows between the roller electrodes while rotating and holding the to-be-welded object between the circumferential surfaces. To an electrode movement mechanism, the roller electrodes are mounted. The electrode movement mechanism moves the roller electrodes along a welding line of the to-be-welded object. Drive sources respectively rotate the roller electrodes and a joint of the electrode movement mechanism. A controller controls an amount by which the roller electrodes rotate based on a torque change in the drive sources so as to keep torques respectively acting on the roller electrodes within a predetermined range.

For the determination of the welding current to be used for the resistance welding of the overlap seam of container bodies, welding with a test body is carried out with a changing strength of welding current which in the test body produces a varying welding of the seam. The current strength varies from welding of this seam with a too high temperature to welding with a too low temperature. Along with this the welding current strength used in the welding is determined so that it is further determined at which point of the seam the welding has been accomplished and with what strength of welding current. By means of a mechanical and/or optical investigation of the welded seam it can then be easily determined where the seam has been correctly welded for the series production of container bodies from the same sheet material as the test bodies. When such a point or such a region of the seam is known the welding current used in the test welding can be taken as the welding current for serial production.

The invention discloses a movable turner for welding a circular seam of a pipeline. The movable turner comprises a turning mechanism which is arranged on a substrate to support and drive the pipeline to rotate, the turning mechanism consists of two rows of turning wheels with an adjustable space between rows, one row of turning wheels are fixedly arranged, the other row of turning wheels are movably arranged, a fixedly arranged turning wheel is used as a driving wheel, and the driving wheel is connected with a driving motor through a speed reducer; and the base is also provided with a frame-type bracket which is higher than the pipeline, and a welding platform is arranged on the top of the frame-type bracket corresponding to the circular seam of the pipeline. According to the movable turner for welding the circular seam of the pipeline, the problems of position adjustment and rotation in a pipeline welding process are solved, the welding is convenient for a welder, and the welding quality can also be guaranteed.

A system for creating a clad material that includes at least one substrate; at least one cladding layer; at least one surface activation layer disposed between the at least one substrate and the at least one cladding layer; and a resistance seam welder, wherein the resistance seam welder is operative to generate heat and pressure sufficient to melt the at least one surface activation layer and form a bond between the at least one substrate and the at least one cladding layer when the at least one surface activation layer is cooled.

When a roller electrode passes through portions (103) to which at least a metal plate is temporarily spot-welded, the pressing force of the roller electrode on a workpiece (101) is reduced, the roller electrode stops being energized, and, after the roller electrode has passed through the portions (103), the pressure force of the roller electrode on the workpiece (101) and energizing of the roller electrode are restored, thereby reducing processing time when the workpiece (101) is seam-welded, and preventing the ends of a seam-welded joint from being stripped away even when the welding joint does not have an endless configuration.

An annular surface of a retainer made of stainless steel plate and an annular surface of an inlet pipe made of zinc plated steel plate are surface contacted. Seam welding is then applied within a surface contacting region of the retainer and the inlet pipe to form a gap at both ends of the surface contacting region, and a zinc plated layer of the inlet pipe is melted to extrude zinc to the gap thus filling the gap with the zinc. According to such manufacturing method, a fuel filler tube excelling in rust preventing performance can be provided without performing a separate rust preventing countermeasure.

The invention provides an electric welding machine for annular sealing. The electric welding machine for the annular sealing comprises a pedestal 1, a support 2, a worktable 3, a sealing copper wheel 4, a rocker arm 8 and a spline shaft 9, wherein the spline shaft 9 can move up and down; the sealing copper wheels 4 with various diameters on the tail end of the support 2 can be installed according to a sealing diameter; the support 2 can move left and right on a cross rod 5; at the moment, the sealing copper wheel 4 is driven to move left and right as well so as to adapt to the various-diameter sealing of various parts; a belt pulley 6 on the spline shaft 9 is connected with a motor 7; a gear in the rocker arm 8 is connected with the spline shaft 9. when the sealing needs to be performed, a power switch is pressed down, the sealing copper wheel 4 is powered on; next, the sealing copper wheel 4 presses the edge of a round part which needs to be sealed; the motor 7 is turned on to drive the belt pulley 6 on the support 2 to rotate; under the rotation of the belt pulley 6, the support 2 is driven to slowly rotate; due to the rotation effect of the support 2, the sealing copper wheel 4 does circumferential motion; therefore, the sealing implemented by the sealing copper wheel 4 is round.

The invention discloses a manipulator for seam welding of oil heater pieces. The manipulator comprises a support, a large arm, a small arm and an oil heater tray, the large arm, the small arm and the oil heater tray are horizontally arranged, one end of the large arm is rotatably connected with the support, the other end of the large arm is rotatably connected with one end of the small arm, the other end of the small arm is movably provided with the oil heater tray through a rotating shaft, and an oil heater piece fixing device is arranged on the oil heater tray. When practically working, the manipulator can completely replace manual operation, automation degree is high, tracks of welding seams are regular, production efficiency is at least doubled after the manipulator replaces manual operation by the aid of inspection of practical operation, dependency on skills of operators is avoided, and the manipulator is fine in practicability.

The invention relates to the field of inner containers, and discloses an inner container, a container and a manufacturing method. The inner container comprises an inner container body composed of an outer-layer inner container and an inner-layer inner container, and the inner container further comprises a roll welding ring arranged between the outer-layer inner container and the inner-layer inner container. The method further comprises the following steps that 1, an inner container blank formed by an outer-layer inner container and an inner-layer inner container is taken; 2, the inner container blank is machined through a roll welding process, so that a roll welding ring is formed between the outer-layer inner container and the inner-layer inner container; and 3, hot or cold spinning machining is conducted on the side wall of the inner container blank to form an inner container body comprising the outer-layer inner container and the outer-layer inner container. After the ring roll welding process is adopted for the wall part of the inner container blank, the connection strength between the outer-layer inner container and the inner-layer inner container is enhanced.