Polishing head for inner surface of elongated bend pipe

Abstract

The invention discloses a polishing head for the inner surface of an elongated bend pipe, which belongs to the technical field of ultra-precision machining. Uniform polishing is difficultly implemented in the prior art; and the prior art is only suitable for short pipes with a small length-diameter ratio. The polishing head has a traction part and a steering part, wherein the traction part has a minor spherical crown while the steering part has a major spherical crown, the two are jointed to form a ball cage, and the inner part of the ball cage is a ball head chamber; a front rotary pull ring is arranged on the top of the spherical crown of the traction part; a bending hole is reserved on the top of the spherical crown of the steering part; the ball head is a sphere positioned in the ball head chamber and connected with one end of a rotating shaft; the other end of the rotating shaft extends outside the bending hole and is connected with a rear rotary pull ring; the inner surface of an envelope ball is a minor spherical surface, and the curvature radius of the inner surface is equal to that of the spherical surface of the outer surface of the ball cage; a plurality of involute drainage channels are distributed in a radial manner in an impeller, one end port of each drainage channel is positioned on an axial small end of the impeller, while the other end port is positioned on a radial edge of the impeller; the envelope ball is connected with the impeller, axial holes sharing the same axis line and having the same aperture are reserved in the centers of the envelope ball and the impeller, and the axial holes are matched with the rotating shaft; and the inner surface of the envelope ball is in clearance fit with the outer surface of the ball cage.

Description

technical field [0001] The invention relates to a polishing head for the inner surface of a slender curved pipe, which is used in conjunction with a polishing liquid to polish the inner surface of a slender curved pipe such as an engine exhaust pipe, and belongs to the technical field of ultra-precision machining. Background technique [0002] If the inner surface of the exhaust pipe of the engine is rough, it will be blocked due to the adhesion of oil, and the airflow will oscillate strongly, accompanied by large pressure fluctuations and noises, which will cause the engine to work unstable, the power will drop, the combustion will be insufficient, and the exhaust will be black. Smoke, exhaust gas emissions increase, fuel consumption increases, on the one hand pollute the environment, on the other hand waste energy. If the inner surface of the cable conduit is rough, it will scratch the sheath of the inserted cable, causing leakage and short circuit. Whether it is an engin...

AI Technical Summary

Problems solved by technology

However, high-pressure water jet polishing and abrasive water jet polishing are difficult to achieve uniform polishing, and there are processing blind spots; abrasive flow polishing is only suitable for short and small pipe fittings due to the limited processing range of machine tools, and is not suitable for long and long pipe fittings. Polishing of the inner surface of the elbow with a relatively large diameter

Images