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Headless rivet chamfer detection method

A detection method and rivet technology, applied in angle/taper measurement, mechanical diameter measurement, etc., can solve problems such as nail feeding failure, parts scrapping, and chamfer angle cannot be judged whether it is qualified or not.

Inactive Publication Date: 2019-06-21
XIAN AIRCRAFT IND GROUP
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  • Application Information

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Problems solved by technology

However, in actual production, it is found that some headless rivets have no chamfers, and during the automatic drilling and riveting process, it is very easy to have a nail feeding failure, and even the edge of the headless rivet collides with the hole wall during the rivet insertion process. Inserted into the hole, causing product damage, or even scrapping the part
[0003] At present, the detection of the chamfer size of headless rivets mainly depends on the naked eye to distinguish the chamfer angle and the caliper to measure the chamfer length and D 无头铆钉 , there are the following disadvantages: 1. The angle of chamfering cannot be judged whether it is qualified; 2. The length of chamfering and D 无头铆钉 The measurement process is long, and the purpose of quick inspection cannot be achieved

Method used

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  • Headless rivet chamfer detection method
  • Headless rivet chamfer detection method
  • Headless rivet chamfer detection method

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Embodiment Construction

[0014] like figure 1 , 2 As shown, a method for detecting chamfering of headless rivets requires a detection gauge 1. The detection gauge 1 is a plate-shaped structure on which a group of diameter detection holes and a group of chamfer detection holes are arranged. A group of diameter detection holes includes a Diameter≥D 无头铆钉 and ≤D 无头铆钉 +0.005mm stop hole 3 and a diameter ≥D 无头铆钉 +0.045mm and ≤D 无头铆钉 +0.050mm passing hole 2; a set of chamfering detection holes includes a superior arc spot facing hole 4 with a spot facing angle ≤50° and ≥49.5° and a superior arc spot facing hole with a spot facing angle ≥40° and ≤40.5° Hole 5, the diameter of the spot facing is D 无头铆钉 +0.025mm, the diameter tolerance of spot facing is ±0.005mm, in addition, there are two chamfering length qualified range lines 6 on the side of the superior arc spot facing hole 5 with a spot spot angle ≥ 40° and ≤ 40.5°, and the detection steps are as follows:

[0015] 1. Pass the headless rivet to be te...

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Abstract

The invention provides a headless rivet chamfer detection method. A detection gauge is used. The detection gauge is provided with a set of diameter detection holes of which the external diameter is atthe upper and lower limits of tolerance and a set of chamfer detection holes of which the countersink angle is at the upper and lower limits of tolerance. The NAS1321 headless rivets are screened bythe diameter detection holes and the chamfer detection holes so as to obtain the qualified headless rivet standard parts.

Description

technical field [0001] The invention relates to the technical field of automatic drilling and riveting, in particular to a method for quickly checking whether the chamfer size meets the drawing requirements in the acceptance of a headless rivet. Background technique [0002] After continuous technological development, the technology of installing headless rivets on automatic drilling and riveting equipment in the field of aircraft panel parts manufacturing has been widely used. However, in actual production, it is found that some headless rivets have no chamfers, and it is very easy to have a nail feeding failure during the automatic drilling and riveting process, and even the edge of the headless rivet collides with the hole wall during the rivet insertion process. If it is inserted into the hole, it will cause damage to the product or even scrap the part. [0003] At present, the detection of the chamfer size of headless rivets mainly depends on the naked eye to distingui...

Claims

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Application Information

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IPC IPC(8): G01B5/24G01B5/08
Inventor 朱兴浩刘义明罗群刘庆蛟霍永兴
Owner XIAN AIRCRAFT IND GROUP
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