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Auxiliary measuring device for detecting relevant sizes of screw holes
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An auxiliary measuring tool and screw hole technology, applied in the direction of mechanical diameter measurement, mechanical clearance measurement, etc., can solve the problems of reduced measurement accuracy, difficult measurement, low efficiency, etc., to achieve the effect of convenient use, simple operation, and improved detection efficiency
Inactive Publication Date: 2012-10-17
SHANGHAI SATELLITE ENG INST
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Problems solved by technology
[0002] The traditional screw hole diameterinspection method is to use the through gauge and the stop gauge to check the thread size, which is time-consuming; the traditional screw hole center distance inspection method is to measure the diameter of each screw hole first, and then use a vernier caliper to measure the relative position of the screw hole edge , and then calculate the distance between the two threaded holes through conversion. Such a measuring tool cannot set the benchmark at the center of the circle, and cannot directly obtain the size of the center of the two screw holes. It must be obtained through the conversion process. If such a measurement method is used, In order to obtain more reliable data, it is often necessary to repeat the measurement several times to obtain the maximum or minimum value for conversion. Since the actual machining thread diameter has a certain error, using the measured value of the screw hole diameter to convert the calculation will introduce two errors, which not only It consumes a lot of time and energy, and will reduce the measurement accuracy; the angle between the two screw holes is difficult to measure, especially the irregular angle, which is basically impossible to measure, and can only rely on its theoretical value, which provides an invaluable tool for detection. stability and inaccuracy
[0003] Therefore, the traditional detection method of screw hole related dimensions is inefficient and cannot keep up with the pace of market development
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Embodiment 1
[0018] Embodiment 1: Measuring the threaded aperture of the screw hole
[0019] The auxiliary measuring tool for detecting thread-related dimensions of the present invention, when measuring the thread aperture, first pinch the knurled area 1 used for screwing, and screw the thread area 3 into the screw hole to be measured, if it is smoothly screwed in, it is qualified, and it is difficult to screw. Further inspection is required.
Embodiment 2
[0020] Embodiment 2: Measuring the center distance of two screw holes
[0021] see figure 2 , select auxiliary measuring tools of different specifications, screw them into the corresponding screw holes, clamp (or withstand) the smooth area 2 of the auxiliary measuring tool with a vernier caliper, read the reading L of the vernier caliper, and then use the calculation formula L-10 (or L+10 ) calculation, the center distance of two screw holes can be obtained.
Embodiment 3
[0022] Embodiment 3: Measuring the angle between two screw holes, especially irregular angles
[0023] see image 3 , select auxiliary measuring tools of different specifications, screw them into the corresponding screw holes, clamp (or withstand) the smooth area 2 of the auxiliary measuring tool with a vernier caliper, read the reading L of the vernier caliper, and then use the calculation formula L-10 (or L+10 ), calculate the center distance of the two screw holes, and the radius of the indexing circle is known as R, and the angle θ between the two screw holes can be obtained by calculation as 2*arcsin((L-10) / 2*R) (or 2*arcsin((L+10) / 2*R)).
[0024] It can be seen from the above embodiments that the auxiliary measuring tool of the present invention can improve the accuracy of traditional detection methods, detect sizes that cannot be detected by traditional detection methods, improve efficiency, and is easy to operate and convenient to use.
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Abstract
The invention relates to an auxiliary measuring device for detecting relevant sizes of screw holes. The auxiliary measuring device comprises a knurling area, a smooth area and a thread area which are sequentially connected integrally, wherein the knurling area is used for spinning and twisting; the smooth area is used for detecting the sizes of the screw holes. The size of the threaded aperture, the center distance between two screw holes and an included angle of the two screw holes can be detected in the detection process, the relevant sizes of the screw holes can be conveniently detected by the auxiliary measuring device, the screw holes with different sizes can be effectively and quickly detected, and the detection efficiency is improved; and the auxiliary measuring device is easy to operate and convenient to use.
Description
technical field [0001] The invention relates to the detection technical field of satellite upper skirt, lower skirt, star arrow connecting ring, instrument deck, flange, etc., and in particular relates to an auxiliary measuring tool for detecting the relevant dimensions of screw holes. Background technique [0002] The traditional screw hole diameterinspection method is to use the through gauge and the stop gauge to check the thread size, which is time-consuming; the traditional screw hole center distance inspection method is to measure the diameter of each screw hole first, and then use a vernier caliper to measure the relative position of the screw hole edge , and then calculate the distance between the two threaded holes through conversion. Such a measuring tool cannot set the benchmark at the center of the circle, and cannot directly obtain the size of the center of the two screw holes. It must be obtained through the conversion process. If such a measurement method is u...
Claims
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Application Information
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