Device and method for magnetically grinding inner surfaces of large-diameter long and straight pipes

Abstract

The invention relates to a device and a method for magnetically grinding the inner surfaces of large-diameter long and straight pipes. The device comprises a bed, spindle motors, couplings, a magneticpole disc, a motor driving slide rail device and a hoisting device. Two ends of each pipe fitting can be sealed by pipe fitting plugs and are fixed by the aid of four-jaw chucks, the four-jaw chuck at one end of each pipe fitting is connected with the corresponding spindle motor by the corresponding coupling, the four-jaw chuck at the other end of each pipe fitting is connected with a support seat by bearings, support seat slide rails are fixed onto the bed, and the support seats are slidably connected with the support seat slide rails by support seat sliders; the motor driving slide rail device is arranged at the bottom of the bed, and the magnetic pole disc is connected with the motor driving slide rail device by the hoisting device, can be lifted under the control of the hoisting device and can axially move along the pipe fittings under the control of the motor driving slide rail device. The device and the method have the advantages that finish machining can be carried out on the inner surfaces of the pipe fittings by the aid of magnetic grinding processes, and carbon deposits, oil stain and rust stain which are accumulated at grooves inside the pipe fittings can be effectivelyremoved by the aid of the device and the method.

Description

technical field [0001] The invention belongs to the field of magnetic grinding, in particular to a magnetic grinding device and method for the inner surface of a long straight pipe with a large diameter Background technique [0002] In aerospace, automobile, industrial production and other fields, large-diameter long straight pipes are widely used. Large-diameter long straight pipes refer to straight pipes with an outer diameter less than or equal to 150mm, a wall thickness less than or equal to 20mm, and a length of pipe fittings less than or equal to 1500mm. There are grooves and other features in some large-diameter tubes, such as the turbine shaft on an aero-engine, it is difficult to finish the inner surface with traditional methods, especially the groove part. After long-term use of such large-diameter pipe fittings, defects such as carbon deposits, oil stains, and rust stains will appear on the inner surface, which will reduce the service life of the pipe fittings. ...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN107214602A discloses a device for derusting and polishing the inner wall of a magnetic tube, and CN107745326A discloses a device for polishing the inner surface of a straight pipe. Good realization of the removal of carbon deposits, oil stains and rust stains in the tank

[0004] At the same time, in the prior art, the grinding track of the inner wall of the pipe fitting is single, and the processing deformation of the inner groove of the pipe fitting is large.

Images