Thread Gauge Phase Alignment for Depth Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional threaded-hole inspection devices lack precise positioning of the thread gauge relative to the rotating-shaft portion, leading to phase differences and inaccurate depth measurements, and require manual resetting of thread pitch when replacing gauges, which can result in adverse inspection events.
Innovation Solution
The device features a thread gauge with a phase-positioning portion that ensures a fixed phase alignment with the threaded hole, eliminating phase differences and allowing for accurate depth measurement without requiring thread pitch resetting, by using a phase-positioning engaging portion on the rotating-shaft portion and a contacting engaging portion to fix the gauge's protrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the thread gauge is mounted on the rotating-shaft portion in a discretionary orientation without phase positioning means, then the device complexity is reduced, but the measurement precision deteriorates due to phase differences between the thread gauge start point and threaded hole thread-start position
Solution Approach 1:
The phase-positioning portion is provided in advance on the thread gauge, and the phase-positioning engaging portion is provided in advance on the rotating-shaft portion. These positioning features are pre-configured to automatically align the thread gauge's start point with the threaded hole's thread-start position when the thread gauge is mounted, eliminating the need for manual phase adjustment and ensuring accurate depth measurement from the outset.
2Reliability
If the incomplete thread ridge portion is removed from the gauge portion tip, then the reliability is improved by preventing cutting into the threaded hole, but the manufacturing precision requirements increase for the gauge portion
Solution Approach 1:
The incomplete thread ridge portion is extracted or removed from the gauge portion tip. This eliminates the harmful element that could cut into the threaded hole during inspection, thereby improving reliability. The removal of this problematic portion prevents adverse events while the gauge portion is designed to ensure complete thread ridges are formed in the inspection range.
3Adaptability or versatility
If manual resetting of thread pitch is required when replacing gauges, then the adaptability is improved for different thread specifications, but the productivity deteriorates due to time-consuming manual operations and risk of adverse events
Solution Approach 1:
The inspection device is configured to automatically identify and adapt to different thread specifications when a thread gauge is mounted. The system self-adjusts parameters such as thread pitch without requiring manual resetting, thereby maintaining versatility for different thread types while eliminating time-consuming manual operations and reducing the risk of human error.
Solution Approach 2:
The device incorporates feedback mechanisms that detect the mounted thread gauge's specifications and automatically adjust inspection parameters accordingly. This feedback loop enables the system to adapt to different thread pitches and specifications automatically, improving productivity by eliminating manual parameter resetting while maintaining full adaptability.
Data Source
AI summary
Provided is a threaded-hole inspection device having high inspection precision. An incomplete thread ridge portion of a gauge portion 5 of a thread gauge 1 is removed, a phase-positioning portion 8 for positioning a tip-side start point 7 of a complete thread ridge at a prescribed phase when the thread gauge 1 is mounted on a rotating-shaft portion 2 is provided to a fastening portion 6 of the thread gauge 1 that is to be fastened to the rotating-shaft portion 2, and a phase-positioning engaging portion 9 that is to engage with the phase-positioning portion 8 is provided to the rotating-shaft portion 2. A depth of a threaded hole 4 to be inspected is measured on the basis of a number of rotations and thread pitch of a rotating-shaft-feeding mechanism 18 that, via threaded engagement, feeds the rotating-shaft portion 2 in a threaded-hole-approaching direction, which is a direction of approach toward the threaded hole 4, the rotating-shaft portion 2 being caused to rotate by a rotary drive portion 3, and on the basis of a distance over which an outward-moving portion 23 moves outward from the threaded hole, and the depth of the threaded hole 4 is calculated.