Measuring tool for measuring large end diameter of conical hole
A tapered hole and measuring tool technology, applied in the direction of mechanical diameter measurement, etc., can solve the problems of great influence, unsuitable for mass production and processing of precision equipment, and difficult to guarantee accuracy, and achieves good versatility, guaranteed accuracy, and good interchangeability. Effect
Active Publication Date: 2014-09-24
XIAMEN TENKEY AUTOMATION
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Problems solved by technology
Therefore, the human factors observed by the measurer from the side of this measurement method have a great influence on the measurement results, and the accuracy is difficult to guarantee, and it is not suitable for the needs of mass production and processing of various precision equipment.
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Embodiment Construction
[0013] The present invention measures the structure of an embodiment of the measuring tool of the large end diameter of the tapered hole, as figure 1 As shown, the gauge includes a housing 1 , a telescoping rod 2 , a compression spring 3 , a ring contact 4 , a nut 5 and a dial gauge 6 coaxially assembled together.
[0014] The housing 1 is provided with a stepped through hole with the large end 11 at the front, the small end 13 at the rear, and the middle section 12 along the front and rear axes. The front end of the housing 1 is provided with an outer flange 14, and the front end of the outer flange 14 is The surface is the measurement reference surface 141 ; the measurement reference surface 141 is perpendicular to the front-back axis of the casing 1 . The middle part of the casing 1 is provided with an axial limiting groove 15 , and the limiting groove 15 penetrates to the middle section 12 of the through hole of the casing 1 . The rear end of the housing 1 is provided wi...
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The invention discloses a measuring tool for measuring the large end diameter of a conical hole, which relates to an apparatus for measuring pore diameters. The measuring tool is provided with a shell, a telescopic rod, a pressure spring, an annular contact, a nut and a dial indicator, wherein a stepped through hole of which the large end faces forward is formed in the shell; the front end face of the shell is a measuring reference plane; the back end part of the shell is provided with an external threaded part and a conical clamping part; the telescopic rod is inserted into the middle section of the through hole in the shell in a sliding way; the pressure spring is sleeved on the telescopic rod, and is positioned between the bottom wall of the large end of the through hole and an outer flange on the front part of the telescopic rod; the annular contact is coaxially fixed on the front end face of the telescopic rod; the nut is threaded on the external threaded part of the shell; the conical clamping part of the shell is sleeved by a conical hole in the back part of the nut; a dial rod of the dial indicator is inserted into and fixed in the small end of the through hole in the shell; and the contact of the dial indicator extends into the middle section of the through hole in the shell, and is pressed against the back end face of the telescopic rod. Through null measurement of the dial indicator of an etalon of the same taper and known large end diameter and measurement of a measured conical hole, the influences of human factors on measuring results are avoided.
Description
technical field [0001] The invention relates to an instrument for measuring aperture. Background technique [0002] In the past, in the process of mass production of products, in order to accurately measure the diameter of the large end of the tapered hole processed on the workpiece, it is necessary to press image 3 As shown, make the conical plug gauge 9 that matches the processed conical hole 81 on the workpiece 8. The taper of the conical section 91 at the front of the plug gauge 9 is identical to the taper of the processed conical hole 81, and the diameter D of the rear cylindrical section 92 in the plug gauge 9 is equal to the diameter of the large end of the processed conical hole 81. During measurement, insert the plug gauge 9 into the measured conical hole 81 on the workpiece 8, and observe from the side whether the boundary line 93 between the conical section 91 and the cylindrical section 92 of the plug gauge 9 is consistent with the measured on the workpiece 8 to...
Claims
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IPC IPC(8): G01B5/08
Inventor 张国梁
Owner XIAMEN TENKEY AUTOMATION