Pipeline cutting and holing fixture and holing process

Abstract

The invention provides a pipeline cutting and holing fixture and a holing process. The pipeline cutting and holing fixture comprises a frame mechanism crossing a pipeline, a centering mechanism used for locating the central point of an intersecting hole, a rotation mechanism and a cutting head, wherein the centering mechanism comprises a rotary lead screw which is vertically arranged, arranged on the frame mechanism in a penetrating manner, and capable of lifting up and down; the rotation mechanism comprises a rotary arm, and the rotary arm is transversally arranged and sleeves the rotary lead screw; and the cutting head is installed on the rotary arm, and driven to carry out intersecting line movement on the outer circumferential wall of the pipeline during rotation. According to the pipeline cutting and holing fixture and the holing process, a station has no need to be fixed, the operation of detachment, movement and cutting can be carried out at any time only by enabling the frame mechanism to cross the outer circumferential wall of the pipeline; the pipeline cutting and holing fixture is simple and convenient to operate, and high in applicability; and moreover, the cost of machining the intersecting hole is lowered.

Description

technical field [0001] The invention relates to a pipeline construction device, in particular to a pipeline cutting and drilling tool and a drilling process. Background technique [0002] Large-diameter engineering pipes are usually welded pipes. The usual manufacturing process is: after the material layout, the CNC cutting machine is used to cut the material, and then the plate is rolled into a cylindrical shape, and finally the circular weld and the straight weld are welded. However, since the outer peripheral wall of the main pipe used for welding the branch pipe is a circular arc surface, the intersecting line between the branch pipe and the main pipe is saddle-shaped, and the intersecting holes on the main pipe cannot be opened on the CNC cutting machine in advance. In addition, due to the large diameter of the main pipe, the usual pipe intersecting wire cutting machine cannot directly drill holes on the surface of the main pipe. [0003] Therefore, the traditional ope...

AI Technical Summary

Problems solved by technology

However, there are three disadvantages in this cutting device: first, the device is a fixed station, the workpiece is located on a fixed tire frame, and the working arm is a single cantilever type, which is inconvenient to move as a whole; Angle displacement, can only cut holes at vertical angles; third aspect, does not have the function of marking lines before cutting holes

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