Elliptical hole machining device

Abstract

The invention relates to an elliptical hole machining device. A workpiece clamping device, a spindle box and a power head are arranged on a seat frame; the spindle box is arranged above a longitudinal feeding device; a hollow worm wheel spindle, a circumferential feeding worm wheel and a circumferential feeding worm spindle are arranged inside the box; a first eccentric axial through hole is formed on the hollow worm wheel spindle; a hollow shaft is arranged in the first eccentric axial through hole; the two ends of the hollow shaft are fixedly connected with pinions respectively; the pinionsare meshed with internal gears which are fixedly connected at the two ends of the box; the gear ratio and the pitch diameter ratio of the internal gears and the pinions are both 2:1; second eccentricaxial through holes are formed on the two pinions; a cutter spindle is arranged in the second eccentric axial through holes; one end of the cutter spindle is provided with a cutter; and the other endof the cutter spindle is connected with the power head through a telescopic universal coupling. The elliptical hole in the invention has a smooth formed surface, accurate dimension and high quality, and the elliptical hole machining device can meet batch machining of different elliptical holes with low machining cost.

Description

technical field [0001] The invention relates to an elliptical hole processing device, which can be used for machining the elliptical holes on the shrinkage end of the boiler header or the circumferential position of the header and other components. Background technique [0002] For containers with smaller diameters, if other detachable structures cannot be used for inspection and cleaning, hand holes or cleaning holes for inspection and cleaning should be provided to facilitate inspection and cleaning of the inside of the container. In order to ensure that the hand can enter the container and the hand entering the hole can move freely, it is stipulated that the short axis of the hand hole on the boiler pressure component should not be less than 80mm, the height of the neck or hole ring should not exceed 65mm, and the inner diameter of the cleaning hole should not be less than 50mm. The neck height should not exceed 50mm. Commonly used cleaning holes or hand holes are round ...

AI Technical Summary

Problems solved by technology

Using wire cutting method, the machining accuracy is high for through-type oval holes, but it cannot be processed for blind-hole oval holes

And the use of numerical control processing, the processing cost is higher

The gas cutting method is mostly used in the industry, which requires high gas cutting skills of the operators, is greatly affected by subjective and human factors, and the quality is difficult to guarantee, which seriously affects the processing quality of oval holes

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