Quick measuring tool for effective lengths of internal threads

A technology of effective length and measurement tooling, applied in the direction of measuring device, mechanical measuring device, using mechanical device, etc., can solve the problem of time-consuming and difficult to ensure the accuracy of the effective length of the internal thread, so as to improve the test efficiency, overcome the accuracy, measure Efficient effect

Inactive Publication Date: 2013-06-26
河南航天精工制造有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a tool for quickly measuring the effective length of the internal thread to solve the problems that the existing injection molding proofing method and bolt screw-in measurement method are time-consuming and difficult to ensure the accuracy of measuring the effective length of the internal thread

Method used

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  • Quick measuring tool for effective lengths of internal threads
  • Quick measuring tool for effective lengths of internal threads

Examples

Experimental program
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Embodiment Construction

[0011] Embodiment 1 of the present invention, such as figure 2 Shown: the tool for quickly measuring the effective length of the internal thread, including a rod body 1, on which the external thread segment 11 is spirally fitted with the internal thread segment within the effective length range of the internal thread of the workpiece 13 to be measured, and the rod body 1 is away from One end of the externally threaded section 11 has a knurling 12, the externally threaded section 11 has a major diameter equal to the minimum diameter of the internally threaded section of the workpiece 13 to be tested, and the end of the rod body 1 close to the externally threaded section 11 has a datum The end face 14, the reference end face 14 is a plane perpendicular to the axis of the external thread segment, the last crest of the end of the external thread segment 11 close to the reference end face 14 terminates at the reference end face 14 and is flush with the reference end face 14.

[00...

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Abstract

The invention relates to a quick measuring tool for effective lengths of internal threads. The quick measuring tool for the effective lengths of the internal threads comprises a rod. An external thread section which is spirally matched with an internal thread section within the range of the effective length of internal threads of a measured workpiece is arranged on the rod, and has a large diameter equal to the minimum large diameter of the internal thread section of the measured workpiece, a reference end surface is arranged at the end, which is close to the external thread section, of the rod, and is a plane perpendicular to the axis of the external thread section, and the last tooth top at the end, which is close to the reference end surface, of the external thread section is terminated on the reference end surface and is flush with the reference end surface. The effective length of the internal threads of the measured workpiece can be completely measured by the quick measuring tool; the measuring efficiency of the quick measuring tool reaches 10-20 seconds per workpiece; and the quick measuring tool has the advantages of simple structure, simplicity and convenience in machining, simplicity in operation and high measuring precision, and problems of long time consumption and difficulty in guaranteeing accuracy when effective lengths of internal threads are measured by an injection molding proofing method and a bolt screw-in measuring method are solved.

Description

technical field [0001] The invention relates to a tool for quickly measuring the effective length of an internal thread. Background technique [0002] Regarding the effective length B of the internal thread, the definition given in the national aviation standard HB5829 is "the distance between the screw-in end face 101 and the last tooth bottom 102 of the complete thread (internal thread refers to the smallest major diameter C)" see appendix figure 1 . This definition is the same as the definition of the effective length of the thread in the American aviation standard AS3062. [0003] For a long time, the measurement of the length of the internal thread has been a problem that has plagued us. At present, the more accurate measurement method is the injection molding proofing method, that is, the injection molding is performed with toothpaste, and then the thread is unscrewed after it solidifies, and the injection molding sample is measured. This method is extremely ineffici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/02
Inventor 王诗成程艺博程全士周杰王永刚穆严兵李子琴张柴华冯德荣
Owner 河南航天精工制造有限公司
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