Processing machine tool for integrated propeller

Abstract

A processing machine tool for an integrated propeller includes a planar turntable (1); a stand (2) which is provided at a side of the planar turntable (1) and can move relative to it; a frame (3) which is provided on the stand (2) and can slide up and down; a mechanical arm (4) which is provided on the frame (3) and can swing up and down; a front processing arm (41) which is provided on the mechanical arm (4) and can turn about its own axis; and a spindle head (9) provided on the front processing arm (41). The invention can avoid the processing error caused by the overturning and repeated location of a workpiece, and the problem of the discontinuous round corners of vane surface at both sides thereof.

Description

technical field [0001] The invention relates to a propeller processing machine tool, in particular to an integral propeller processing machine tool. Background technique [0002] Marine propellers are the core components of water vehicles such as ships, ships, submarines and aircraft carriers. The performance of propellers has a great impact on propulsion efficiency, noise and life. Marine propellers are divided into two types: controllable pitch propellers and integral propellers. Among them, the blades of the controllable pitch propeller can be rotated in the propeller hub to change the angle of attack of the blades to adapt to different ship speeds. It is mainly used for ships directly driven by low-speed diesel engines; for ships with speed change devices in the transmission chain, the overall Propellers usually give better results. [0003] The shape of the overall propeller is very complex, and the surfaces that need to be machined include the pressure surface and su...

AI Technical Summary

Problems solved by technology

[0004] At present, the overall propeller is usually processed on a six-axis five-linkage or six-axis six-linkage machine tool similar to a five-axis floor boring machine or a vertical turning-milling compound machining center. Although this type of equipment can process the blade surface better, However, usually only one side of the blade can be processed in one installation, and the other side of the blade needs to be turned over for repositioning and reinstallation, which not only takes time and effort, but also causes repeated positioning errors

In particular, the propeller blade is a thin-walled part with weak rigidity, and the part far from the fixture is easy to sag naturally due to its own gravity during installation. Therefore, when reinstalling and positioning to process the other side of the blade, the blades on both sides of the blade The rounded corners of the blades will not be connected together. It is very difficult to process the rounded corners of the front and rear edges of the blade and the hub. Partial surfaces can only be shoveled by hand, which seriously damages the smoothness of the blade, and these unsmooth parts will be damaged. Cavitation is generated, and when the cavitation disappears, the centripetal explosion will generate shock waves, which will cause cavitation and noise. Severe cavitation will damage the surface of the blade, causing the material on the surface of the blade to peel off, and the propeller is scrapped

This lack of continuity of the rounded corners on both sides of the blade surface is more prominent when processing the blade surfaces on both sides of the large-thrust integral propeller blade with a large angle of attack and a certain caster angle.

[0005] In addition, the spindle head of this type of equipment cannot avoid the interference with the blade surface when processing the blade surface, so it is powerless to process the blade surface of the overlapping part of the adjacent blades, and the rounded corners of the hub and the front and rear edges of the blades are processed. It is also very difficult, and only manual shoveling can be used on the partial surface

Images