Abstract:
Apparatus which may be mounted upon a lay barge to weld an end of a pipe spool to an end of a pipeline used under water, includes a stand fixed to the pipeline to support and secure its outer end, a pipe spool support which may hold a spool in coaxial relationship with the pipeline and with one end abutting the outer end of the pipeline, a laser positioned to direct a beam of coherent radiation along the axis of the pipeline, a reflection system including a mirror mounted for movement through an arc of 360.degree. in the path of the laser beam to reflect that beam radially on the abutting ends of the pipeline and pipe spool, and a laser energy source for generating a beam of sufficient intensity to weld together the abutting ends of the pipeline and the pipe spool.
Abstract:
A diffusion bonding method has a step of adjusting ends of material to be bonded before bonding the material after setting the materials in the diffusion bonding apparatus, whereas a diffusion bonding apparatus has a mechanism for finishing ends of materials to be bonded so that both ends face parallel to each other.
Abstract:
A mobile automated pipeline welding and quality control system comprising a gas metal arc welding carriage and a weld data monitor and acquisition unit. The welding carriage carries a welding torch, wire feed device for feeding consumable wire to the torch, an oscillator for oscillating the torch and a motorized drive mechanism for moving the carriage about a weldment. A controller for the carriage includes digital control circuitry for dosed loop control of the drive, oscillator and wire feed devices. By default, the controller operates each device at one of a plurality of pre-programmed nominal speeds selected from a mode table. The controller is responsive to drive, oscillation and wire feed speed variation signals under the control of an operator, and varies the speed of each device within speed ranges which are selected to ensure compliance with welding specifications. The monitor has voltage and current transducers for measuring current and voltage at the welding torch. The controller supplies the monitor with speed data relating to the drive, oscillator and wire feed devices. All of this information can be displayed and recorded in the monitors memory. In addition, the monitor can compute and display the heat input into the weld based on the detected welding parameters. This information allows the operator to make minute adjustments during the welding process to ensure that a weld falls within specifications.
Abstract:
Improved welding method and padeye processing speeds up the connection of individual joints by peripheral fusion welding while the joint to be added stands vertically atop an existing pipe string also standing vertical in the rig floor. A plurality of welders can operate to speed up completion of the weld by removing heat from the pipe during the welding process. Heat is removed by the use of fluid cuffs near the weld area and, optionally, by using a spool within the pipe string to dispense expansion cooled air against the inner pipe wall in the vicinity of the weld. A special improved padeye is provided for welding near the pipe ends for handling. The padeye has a divided profile, a hole for a lifting shackle, and it will be accepted within the skirt of the lead system of the driving hammer. The upper end of the padeye can be cut from the pipe while the pipe is resting, on rig related structure, on the lower surface of the padeye.
Abstract:
The present invention provides a method and apparatus to control and verify weld-quality in a homopolar pulsed weld by measuring in-process parameters. Methods are disclosed for real-time weld-quality control in a weld-quality control system for homopolar pulsed welding, including measuring at least one in-process parameters that correlates to a resulting weld-quality of a weld. Further, methods are disclosed for post-process weld-quality verification for homopolar pulsed welding, including identifying at least one in-process parameter that may be used as a post-process weld-quality verification parameter and utilizing such a post-process weld-quality verification parameter to verify the weld-quality after a homopolar pulsed welding process.
Abstract:
An apparatus method for pipe end preparation and end to end welding of pipes comprises a stationary annular clamp (4) for both clamping and round up of pipes (2). It also has one or two rotating tool carrier rings (5) mounted at one or both sides of the clamp (4) on a track (6). The rotating ring may have thereon devices for cutting, machining of grooves, welding and non-destructive testing (NDT). The round up of the pipe is performed via 6 or more clamping shoes independently operated by screw jacks (18), a wedge mechanism (15) or directly acting hydraulic cylinders.
Abstract:
A mold is disclosed for conducting molten weld metal from a crucible to a position surrounding the abutting ends of two pipe joints to fuse the weld metal and the abutting pipe ends.
Abstract in simplified Chinese:激光加工设备系具备:加工头、用来加工板状工件之板状工件加工台、具有棒状工件把持部而用来加工棒状工件之棒状工件加工台、以及可移动地设有加工头之加工区域。板状工件加工台设置成可从加工区域的一侧往加工区域移动。棒状工件加工台设置成可从位于一侧的相反侧之加工区域另一侧往加工区域移动。依据上述激光加工设备,在切换板状工件的加工和棒状工件的加工时,只要让板状工件加工台和棒状工件加工台往加工区域移动或从加工区域退避即可,而能容易地进行切换作业。
Abstract in simplified Chinese:熔着接头1具备接头本体部10。接头本体部10具有在接头本体部10之轴向的端部12。端部12可借由加热器熔融,俾和其他熔着接头1的端部熔着。在未受夹固部挟持的接头本体部10的外周部分,就接头本体部10受夹固部挟持的部分的外周部位而言系位在和端部12相反侧的部分,朝着接头本体部10外周的圆周方向以等间隔存在有定位刻度13。熔着接头1系使定位刻度13和设于夹固部的基准记号对齐,俾得以和其他熔着接头1熔着。
Abstract in simplified Chinese:一激光系统包括一注射激光源,其具有一输出且可运作以提供一激光输出,该激光输出之特征在于一第一波长、一第一线宽、与一输出功率。该激光系统亦包括一可调整脉冲化源,其特征在于一增益带宽。该可调整脉冲化源系可运作以提供具有一平均功率之一输出信号。该输出信号包括复数个光学脉冲。该些复数个光学脉冲之各者之特征在于一第二波长、一第二线宽、与一尖峰功率。该激光系统更包括一光学结合器,该光学结合器具有一第一端口、一第二端口、与一第三端口,该第一端口耦合到该注射激光源之输出,该第二端口耦合到该可调整脉冲化源。