Screw Drive Depth Testing Device Using Calibrating Element
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Solution Overview
Problem
Existing methods for testing the depth of screw drives, such as using calipers or cutting methods, are not precise and are cumbersome, especially for small screws, leading to unreliable results and increased costs due to the need for cutting.
Innovation Solution
A depth testing device comprising a supporting assembly, testing assembly, catching assembly, and calibrating assembly that allows for precise measurement of screw drive depth without cutting, using a combination of guiding blocks, adjusting modules, and calibrating elements to accurately determine the depth of screw drives of varying sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If calipers are used to test the depth of screw drives, then the testing method is simple, but the measurement precision is insufficient
Solution Approach 1:
The patent introduces a calibrating element as an intermediary standard with a known depth that is pressed against the screw drive being tested. This calibrating element serves as a mediator between the testing device and the screw drive, enabling precise depth measurement by comparing the screw drive depth against the calibrated standard, thereby achieving high measurement precision while maintaining operational simplicity
Solution Approach 2:
The patent changes the measurement parameter from direct caliper measurement to a comparative measurement system using a calibrating element with a predetermined depth. By establishing a reference parameter (the calibrating element's known depth) and comparing the test object against it, the system achieves higher precision without complicating the operation
2Measurement precision
If cutting method is used to test the depth of small screws, then the depth can be measured, but the cutting precision is difficult to assure and the work is tedious
Solution Approach 1:
The patent extracts the cutting operation entirely from the testing process. Instead of cutting the screw to measure depth, the system uses a non-destructive method where a testing probe is inserted into the screw drive and its depth is measured against a calibrating element. This removes the harmful cutting step while preserving the ability to measure depth accurately
Solution Approach 2:
The patent creates a copy or replica of the depth measurement function through the calibrating element, which has a predetermined depth that serves as a reference. Rather than physically altering the screw (cutting), the system uses this reference copy to determine the screw drive depth through non-contact comparison, eliminating the need for tedious and imprecise cutting work
3Device complexity
If conventional testing methods are used, then the process is simple, but the accuracy of test results is not precise
Solution Approach 1:
The calibrating element acts as an intermediary reference standard with a precisely known depth. The testing device compares the screw drive depth against this mediator element, transferring the precision of the calibrated standard to the measurement process. This intermediary approach achieves high accuracy without requiring the entire testing system to be extremely complex
Solution Approach 2:
The calibrating element is pre-calibrated with a predetermined depth before use. This preliminary action of establishing a known reference standard allows subsequent measurements to be accurate without requiring complex real-time calibration procedures during testing, thus maintaining simplicity while achieving precision
Data Source
AI summary
A depth testing device for testing depth of a screw drive includes a supporting assembly which is for supporting the screw, a calibrating assembly, and a testing assembly. The calibrating assembly includes a calibrating element which presses on the top end of the screw. The testing assembly includes a testing device and a testing probe, the testing device includes a testing member and a testing pole stretching relative to the testing member. One end of the testing probe is received in the testing pole. The reading of the testing member is reset to zero first, then the other end of the testing probe is moved and is inserted into the drive of the screw, recording the reading of the testing member. The depth of the drive of the screw is calculated by the test reading subtracted by the thickness of the calibrating element.