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A Double Ball Measurement Method for Counterbore Angle

A measurement method and height measurement technology, applied in the field of double-ball measurement method of countersunk hole angle, to achieve the effect of simple measurement tool, improved accuracy, and convenience for operators to master

Active Publication Date: 2017-09-22
AEROSPACE PRECISION PROD INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention aims to propose a double-ball measurement method for counterbore angle, to solve the needs of accurately measuring the counterbore angle

Method used

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  • A Double Ball Measurement Method for Counterbore Angle
  • A Double Ball Measurement Method for Counterbore Angle
  • A Double Ball Measurement Method for Counterbore Angle

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Embodiment Construction

[0051] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0052] In addition, the bottom of the counterbore mentioned in the embodiments of the present invention refers to the cylindrical part of the conical counterbore.

[0053] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0054] A double-ball measurement method for counterbore angle, the counterbore to be measured is a conical counterbore, the hole wall of the orifice 21 is conical, and the counterbore orifice 21 and the counterbore orifice 21 are in contact with the counterbore There is a transfer circle at the junction of 22 at the bottom of the hole, and the specific measurement steps are as follows:

[0055] The first step is to prepare the height measuring instrument 4 and a plurality of steel balls 3 with known diameters but different s...

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Abstract

The invention provides a double-ball measurement method for the counterbore angle. The counterbore to be measured is a conical counterbore, the hole wall of the orifice is conical, and the orifice of the counterbore and the orifice of the counterbore are in contact with the counterbore. There is a transfer circle at the junction of the bottom of the hole. The method is to prepare a height measuring instrument and a plurality of steel balls with known diameters but different sizes; place steel balls with different diameters in the counterbore by trial and error , select two steel balls with different diameters and whose outer wall is in contact with the tapered hole wall at the opening of the counterbore to be measured; then put the two selected steel balls into the counterbore in turn, and then pass the height measuring instrument Measure the height difference of the apex when two steel balls are respectively placed in the counterbore, and then calculate the precise angle value of the counterbore orifice through the formula. The measuring tool used in the method for measuring the angle of the counterbore opening with double steel balls described in this patent is simple, and the measurement steps are easy to operate. At the same time, the conical counterbore is accurately obtained after considering the shape of the counterbore actually processed. the orifice angle.

Description

technical field [0001] The invention belongs to the field of counterbore measurement, in particular to a double-ball measurement method for counterbore angle. Background technique [0002] Countersunk holes are often provided in upsetting dies, testing tooling and many parts. The opening angle of the counterbore has a great influence on the mechanical properties of parts such as fit, pre-tightening force, and high cycle fatigue. For counterbores with concave conical surfaces, ordinary protractors and projectors cannot be used to directly measure them. [0003] The current methods for measuring the angle of the counterbore include the lead filling method, the riveting filling method, the coloring gauge method, and the three-coordinate measuring instrument method. Among them, the lead filling method and the pressure riveting filling method are to fill the counterbore cavity of the test piece with another material through fluid deformation or plastic deformation, and then take...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/24
Inventor 郭双双王川桂林景胡隆伟刘如刚齐跃
Owner AEROSPACE PRECISION PROD INC LTD
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