Expansion core fastening device for turning outer circles of large pipes

Abstract

The invention discloses an expansion core fastening device for turning outer circles of large pipes. The expansion core fastening device comprises a transversely-arranged conical core, an outer block, an inner block and a tail seat. The conical core is fixedly connected to a chuck through a draw-in bolt. A conical head of the conical core is arranged in a conical hole of the outer block in a fitted manner, and a tip of the tail seat is arranged in a conical hole of the inner block in a fitted manner; and the outer block is fixedly connected with the inner block through a bolt, and rubber rings are arranged on a contact face between the outer block and the inner block. The expansion core fastening device has the beneficial effects that when pressure is applied to the tail seat, the rubber rings (3) between the inner block and the outer block enable the pipes (5) to be tightly expanded from the interiors, the outer circles can be turned at tensioning portions, and fluttering cannot be generated. The large pipes are fastened to a device head through the draw-in bolt (1), and the inner walls of the ends of the pipes are borne by flanges without flattening.

Description

technical field [0001] The invention relates to a connecting device, in particular to an expanding core fastening device for the outer circle of a large pipe of a vehicle. Background technique [0002] A lathe is a machine tool that mainly uses a turning tool to turn a rotating workpiece. Drills, reamers, reamers, taps, dies and knurling tools can also be used for corresponding processing on the lathe. Lathes are also known as machine tools, and workers who use lathes are called "turners". In the machining industry, lathes are considered to be the working "mother machine" of all equipment. Lathes are mainly used to process shafts, disks, sleeves and other workpieces with rotating surfaces, mainly cylinders, and are the most widely used type of machine tools in machinery manufacturing and repair factories. Rotating machines such as milling machines and drilling machines are derived from lathes. In Hong Kong and other places of our country, there are also people called lath...

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is that the existing method of turning the large tube produces deformation pressure on the large tube, resulting in the deformation of the large tube, and shaking during processing affects the machining accuracy. For this purpose, an expansion core fastening device for the outer circle of the large tube is provided.

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