Deep hole wall thickness online detection device

Abstract

The invention relates o a deep hole wall thickness online detection device; under the action of a positioning air cylinder, a pipe end positioning assembly is used for positioning and clamping a workpiece to be measured; a detection rod of an inner measuring assembly enables a detection head at the right end to abut against the upper wall surface in a deep hole of the workpiece to be measured under the action of a propelling air cylinder, and the deviation value I is read by an inner measuring displacement sensor; meanwhile, an outer measuring displacement sensor is driven to descend under theaction of a measuring air cylinder of an outer measuring assembly, the outer wall surface of the deep hole of the measured workpiece corresponding to the outer measuring head is measured, and a deviation value II is read; and the value of the deep hole wall thickness of the measured workpiece is the sum of the standard wall thickness, the deviation value I and the deviation value II. The online detection device has the advantages that based on the telescopic property of the small air cylinder, the axis of the detection rod before measurement can be kept consistent with the center of the deephole, the constraint of the detection rod can be released during measurement, the detection rod can rotate around a supporting point rotating shaft, and therefore the measuring head can abut against the upper wall surface. The online detection device is simple in structure and relatively low in cost.

Description

technical field [0001] The invention relates to an on-line detection device for the wall thickness of a deep hole, which is used for on-line measurement of the wall thickness of a deep hole in a workpiece to be measured. Background technique [0002] A fuel pipe product has a long hole with a deep depth in the axial direction. During the machining process of the deep hole, the tool may jump, which makes the center of the processed deep hole inclined, resulting in uneven wall thickness at the far end of the deep hole. However, if the wall thickness of the fuel pipe under high-pressure working conditions does not meet the technical specification requirements, the product will break and cause accidents to the running vehicles. Therefore, the manufacturer needs to conduct wall thickness testing for each processed product. The original fuel pipe is manually inspected after deep hole processing. In order to improve production efficiency, some companies use automatic processing pro...

AI Technical Summary

Problems solved by technology

The present invention is to design a set of deep hole wall thickness on-line measuring device, but this design needs to overcome several difficulties: 1) At present, ultrasonic testing is generally used for manual testing, but ultrasonic testing needs to add coupling agent to detect, and the measurement stability Not enough, so it is inconvenient to use in automatic measurement

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