Full-hydraulic drive open-type double-main-shaft numerical control underwater stitch welding equipment

Abstract

The invention discloses a full-hydraulic drive open-type double-main-shaft numerical control underwater stitch welding equipment which comprises two sets of positioning and clamping mechanisms which are bilaterally symmetrically arranged; a movable supporting frame in sliding connection with the two sets of positioning and clamping mechanisms in the peripheral direction is arranged across the two sets of positioning and clamping mechanisms; a set of peripheral moving mechanism connected with the movable supporting frame is arranged between the two sets of positioning and clamping mechanisms; a cantilever beam in sliding connection with the movable supporting frame in the X-axis direction is arranged on the movable supporting frame; an auxiliary supporting frame is fixedly connected to the lower part of the cantilever end of the cantilever beam; the auxiliary supporting frame sleeves a pipe-like object to be welded in a hollow manner; the cantilever beam is driven an X-axis moving mechanism; the X-axis moving mechanism is mounted on the movable supporting frame; a B-axis swinging oil cylinder perpendicular to the X axis is mounted on the outer side of the cantilever end of the cantilever beam; the B-axis swinging oil cylinder drives a Z-direction main shaft head vertical to the B-axis swinging oil cylinder to swing. The equipment has the outstanding characteristics that the repairing range is large, the operation of main shafts is stable, the driving is precise and reliable, and the positioning and clamping mechanisms are excellent in adaptability.

Description

technical field [0001] The invention relates to a numerical control friction welding machine, in particular to a fully hydraulically driven open double-spindle numerical control underwater friction welding equipment. Background technique [0002] Nowadays, countries all over the world attach great importance to seabed resources, and the exploitation and utilization of seabed resources are intensifying, so there is an urgent need for safe, reliable and economical underwater connection repair technology and equipment. The underwater mechanical connection operation is complicated, the quality of wet welding is poor, and the cost of dry welding is high. However, friction stitch welding technology has the advantages of insensitivity to water depth, small welding deformation, high efficiency, and low energy consumption. Therefore, it has been widely used in recent years. application. [0003] Chinese patent document CN103071914A disclosed an underwater friction stitch welding equ...

AI Technical Summary

Problems solved by technology

The equipment adopts a closed structure with small operating space, and can only repair the middle part of the straight pipe of the tubular object, and the node part of the tubular object cannot be repaired

The equipment is equipped with only one spindle head to complete the drilling, plug welding, cutting and grinding work in the repair process. Since the required speed for drilling and grinding is about 400r / min, the required speed for plug welding and cutting is 8000r / min. Min, and the repair objects are mostly difficult-to-machine materials such as DH36, which will cause work hardening after welding. The same spindle head can complete various tasks with large speed differences, which may easily lead to unstable work

The drive of the equipment is realized by the gear rack driven by the motor acceleration and decelerator. There is a transmission backlash, and the transmission accuracy is not high, which has an adverse effect on the repair quality.

[0004] To sum up, the limitations of the above structure are: the operation space is small, the repair range is small, and a single spindle completes various tasks, which is likely to cause unstable work; the driving form of the motor accelerator and reducer drives the rack. There is a transmission backlash, which affects the repair quality. adversely affect

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