Method used for detecting four-joint guide blade reference arc surface

Abstract

The invention discloses a method used for detecting a four-joint guide blade reference arc surface; the method mainly comprises the following steps: using 6 positioning members to fix a four-joint guide blade on a slide board of a measuring device, and allowing the four-joint guide blade reference theory arc surface to match and be concentric with an arc guide rail surface arc on the measuring board; using an A-direction slide guide adjusting assembly to adjust the slide board in the A direction; using a meter check point of a meter check block fixed on the measuring board as the baseline, and using a dial gauge to measure the center of the arc guide rail surface and the center of the four-joint guide blade reference arc surface; using a B-direction slide guide adjusting assembly to adjust the slide board according to the reference arc surface center deviation direction, allowing the nonconcentricity between the reference arc surface center and the arc guide rail surface center to be in a set value scope, and recording the mobile distance of the slide board in the B direction; adjusting the mobile distance to be smaller than a design value, thus allowing the edge plate reference arc surface of the four-joint guide blade satisfies requirements, otherwise, the four-joint guide blade reference arc surface fails.

Description

technical field [0001] The invention relates to the technical field of quadruple guide vane processing, in particular to the detection technology of the processing reference arc surface of the quadruple guide vane, and in particular to a method for detecting the reference arc surface of the quadruple guide vane. Background technique [0002] The quadruple guide vanes are finished by casting rough parts through finishing machining. The processing process is to use the six original positioning points of the quadruple guide vanes to locate and process the large end edge plates of the quadruple guide vanes, and then use the arc of the large end margin plates to The other parts of the blade are processed on the basis of the surface. Before machining other parts of the blade based on the arc surface of the large end edge plate, it is necessary to detect the reference arc surface to detect the deviation of the machined arc surface of the edge plate relative to the theoretical arc s...

AI Technical Summary

Problems solved by technology

There is a problem like this: whether the personal experience is rich or not plays a key role in the qualification judgment of the blade to be tested, if in case the consideration factor is not comprehensive and the artificial judgment of the measurement operator is unreasonable, it is easy to cause inaccurate evaluation of the measurement data; the present invention can Clearly detect and separate the accurate eccentricity errors of the measured parts in the A direction and the B direction, and then compare them with the allowable tolerances required by the design, and the results are directly used to judge whether the tested quadruple guide vane is qualified or not

Images