Electromagnetic circle drawing device for borehole

Abstract

The invention relates to the field of ship manufacturing tools, in particular to an electromagnetic circle drawing device for a borehole. The electromagnetic circle drawing device comprises a first connecting arm, an openable and closeable magnetic seat, a second connecting arm, a third connecting arm and a circle drawing needle, wherein the first connecting arm is vertically arranged, and the openable and closeable magnetic seat is used for supporting the first connecting arm; the second connecting arm is arranged perpendicular to the first connecting arm, and the height of the second connecting arm can be adjusted; and one end of the third connecting arm is rotatably connected with the second connecting arm, and the other end of the third connecting arm is rotatably connected with the circle drawing needle. According to the electromagnetic circle drawing device, the structure is simple, the use is convenient, the operation is easy, accurate circle drawing of the borehole in the section of a cast forge piece can be realized, and the boring quality is guaranteed; a base of the electromagnetic circle drawing device can be matched with a boring cutter bar and absorbed and fixed; andthe height of the electromagnetic circle drawing device can be adjusted to be suitable for the cast forge pieces of various sizes, so that the practicability is high.

Description

technical field [0001] The invention relates to the field of shipbuilding, in particular to an electromagnetic boring and circle drawing device. Background technique [0002] Boring is the further processing of forging and casting rough holes. In the shafting installation stage of berth in shipbuilding, shafting boring, as a key process, plays a very critical role in the quality of shafting installation. Boring can enlarge the aperture, improve precision, reduce surface roughness, and can better correct the deviation of the original hole axis. Boring can be divided into rough boring, semi-fine boring and fine boring. The dimensional accuracy of fine boring can reach IT8~IT7, and the surface roughness Ra value is 1.6~0.8μm. Boring is divided into general boring and deep hole boring. General boring can be done on ordinary lathes, and the boring tool can be fixed on the tailstock of the lathe or on a small tool holder. Deep hole boring requires a special deep hole drilling a...

AI Technical Summary

Problems solved by technology

[0003] After the shafting boring process in the process of shipbuilding and shafting installation is over, it is necessary to draw a circle on the cross section of the casting and forging to further measure the boring quality. Traditionally, hand-held micrometers or dial indicators are used for measurement, which is inconvenient to operate and has poor accuracy. The operating level and construction experience of operators are high, which can easily lead to unstable accuracy and quality of shafting boring

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