Limiting axial wall thickness dimensional measurement method of variable cross-section inner cavity revolution body

Abstract

The invention discloses a limiting axial wall thickness dimensional measurement method of a variable cross-section inner cavity revolution body. The measurement method comprises the steps of preparing for a measuring mandril, preparing for a locating pin, preparing a measuring tool, placing a locating mandril on a test platform, enabling a big end face of the locating mandril to face downward and contact a work surface of the test platform, assembling a big end of a bushing downwards on the locating mandril, rotating the bushing, enabling an inner cavity conical surface of the bushing to be completely in contact with a small end face of the locating mandril, and the like. The measurement method has the advantages of being simple, accurate, convenient and rapid, and high in detection efficiency; measuring can be carried out on a processing site, an operator can command processing conditions in time and adjusts technological parameters; and the measurement method is particularly suitable for mass production and high in work efficiency.

Description

technical field [0001] The invention relates to a method for measuring the limit axial wall thickness of a revolving body with variable cross-section, and belongs to the technical field of measurement. Background technique [0002] The method of checking wall thickness in the industry usually uses wall thickness vernier caliper measurement, wall thickness caliper or three-coordinate measurement. Wall thickness calipers and wall thickness calipers are only suitable for the detection of equal wall thickness and the wall thickness dimension is required to be in the normal direction, but cannot detect the wall thickness of variable cross-sections, because when measuring the wall thickness with wall thickness vernier calipers and wall thickness calipers, it is impossible The radial limit is realized, and at the same time, the clamp foot contacts the surface to be measured to generate a measurement force. The measurement force will cause the clamp foot to slide in the direction of...

AI Technical Summary

Problems solved by technology

Wall thickness calipers and wall thickness calipers are only suitable for the detection of equal wall thickness and the wall thickness dimension is required to be in the normal direction, but cannot detect the wall thickness of variable cross-sections, because when measuring the wall thickness with wall thickness vernier calipers and wall thickness calipers, it is impossible The radial limit is realized, and at the same time, the clamp foot contacts the surface to be measured to generate a measurement force. The measurement force will cause the clamp foot to slide in the direction of wall thickness reduction, resulting in a large measurement error; multiple measurements, the difference between the results is 1mm

Although three coordinates can be used to accurately detect the variable section limit axial wall thickness dimension, there are many shortcomings in three coordinates measurement. 1. Excessive measurement accuracy and waste of resources; 2. Not suitable for the detection of large batches of parts; 3. Measurement workstation and processing Not in the same work place, resulting in parts turnover and increased costs. 4. When processing a large number of parts, tool wear will cause changes in the processing size. If the parts are not detected in time, the operator will not be able to grasp the processing dynamics in time, and will not be able to adjust in time. Process parameters to ensure that the processed parts are qualified

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