A method for measuring the outer circle size of aviation annular thin-walled parts and its special fixture
A measuring method and a ring-shaped technology, applied in the direction of measuring device, mechanical measuring device, using mechanical device, etc., can solve the problem of not meeting the needs of batch production, and achieve the effect of small measuring force, high efficiency and strong dimensional reproducibility
Active Publication Date: 2017-01-18
CHINA HANGFA SOUTH IND CO LTD
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Problems solved by technology
Can not meet the needs of batch production
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[0023] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. Wherein, the same parts adopt the same reference numerals.
[0024] Such as Figure 4 As shown, which shows a part measurement section view of the method for measuring the outer circle size of aviation annular thin-walled parts according to a specific embodiment of the present invention, wherein, the weight of the aviation annular thin-walled parts that the method is specially aimed at is 0.1 ~5 kg, and its outer circle size is 50 to 60 times the wall thickness. As mentioned in the background technology section, the above-mentioned parts are very light in weight, thin in wall thickness and relatively large in size. It is easy to deform the parts and cause inaccurate measurement by conventional measurement methods, which cannot mee...
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A method for measuring the outer circle size of an aerial annular thin-wall type part comprises the following steps that a fixture and a dial test indicator are arranged on a measuring platform, the position and the height of the fixture and the position and the height of the dial test indicator are adjusted according to the design parameters of the part, the part is placed on the measuring platform, the aerial annular thin-wall type part is pushed to be attached to the fixture tightly to penetrate through an interval channel between the fixture and the dial test indicator to squeeze the dial test indicator away, the dial test indicator obtains the maximum value of the interval channel, and the maximum value of the interval channel is the outer circle size of the aerial annular thin-wall type part. The invention further provides the fixture dedicated to the method. The method for measuring the outer circle size of the aerial annular thin-wall type part can avoid deformation of the part due to the influence of external force, and avoid the phenomenon of mismeasurement, measuring force is small and is merely the elastic force of the measuring head of the dial test indicator, size obtained through measurement is strong in reproducibility, measuring precision is high, and the method and the fixture are convenient to operate, high in efficiency, and capable of meeting needs of mass production.
Description
technical field [0001] The invention relates to a method for measuring parts in the aviation field, in particular to a method for measuring the outer circle size of annular thin-walled parts in the aviation field. The invention also relates to a jig dedicated to the above method. Background technique [0002] As we all know, the parts used in the aviation field are often made of high-quality alloys such as titanium alloys, nickel-based alloys, etc., which require very high precision, and often need to be measured repeatedly after processing to obtain accurate dimensional data for overall quality control . E.g, figure 1 Shown is a cross-sectional view of an annular thin-walled part 1 of an aero-engine, and its accuracy requirements are: the outer circle dimension D1 is Φ70.866mm~Φ70.878mm, the inner hole size D2 is Φ68.174mm~Φ68.274mm, the wall thickness d is 1.297 mm to 1.352 mm. [0003] It can be seen from the above parameters that the wall thickness d of this ring par...
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IPC IPC(8): G01B5/00
Inventor 鄢勤
Owner CHINA HANGFA SOUTH IND CO LTD