阅读说明：本技术 一种航空机匣壁厚检验方法 (Method for detecting wall thickness of aviation case ) 是由 于德庆 赵波 王忠涛 王孙菲 戎漪婷 于 2020-04-03 设计创作，主要内容包括：本发明属于航空机匣领域,涉及一种航空机匣壁厚检验方法。使用新的形状对比技术进行测量壁厚,制作专用测量量具,量具使用销孔定位,按照壁厚大小做出内壁形状,量具内壁边缘形状按最小壁厚和最大壁厚设计成两个量具,量具按在零件表面即可通过对比量具与毛坯边缘判断壁厚大小,使用该量具测量节省大量时间,而且检验人员不需要对比测量值和理论值大小,减轻检验人员负担,降低检验人员疲劳度。(The invention belongs to the field of aviation casings and relates to a wall thickness inspection method for an aviation casing. The measuring tool is designed into two measuring tools according to the minimum wall thickness and the maximum wall thickness, the measuring tools can judge the wall thickness according to the comparison between the measuring tools and the blank edge on the surface of a part, a large amount of time is saved by using the measuring tools, and inspectors do not need to compare the measured value with the theoretical value, the burden of the inspectors is reduced, and the fatigue of the inspectors is reduced.)

1. The method for detecting the wall thickness of the aviation case is characterized by comprising the following steps of:

1) firstly, selecting two positioning pin holes on a part as a reference, drawing the edge of a blank according to the minimum wall thickness of a part drawing, designing a measuring tool according to the positioning pin holes and the edge of the blank,

2) processing a measuring tool according to a design drawing,

3) two positioning pins are arranged on the measuring tool and matched with the positioning pin holes of the casing, and whether the hole wall is smaller than the minimum wall thickness is determined by comparing the position relation between the edge of the measuring tool and the edge of the part blank.

2. The aircraft casing wall thickness inspection method according to claim 1, wherein said gauge material is steel.

3. The method for inspecting the wall thickness of an aircraft casing according to claim 1, wherein the measuring gauge is provided with a plurality of weight-reducing grooves while meeting the rigidity requirement.

4. The aircraft casing wall thickness inspection method according to claim 1, wherein the measuring gauge is designed with interference-preventing through holes according to the structure of the part.

5. The aircraft casing wall thickness inspection method according to claim 1, wherein the positioning pin is a precision hole.

6. The aircraft casing wall thickness inspection method according to claim 1, wherein the positioning pin is detachable.

7. The method of claim 1, wherein the gauge is further provided with bolt-passing holes.

8. The aircraft casing wall thickness inspection method according to claim 1, wherein the gauge thickness is 20 mm.

Technical Field

The invention belongs to the field of aviation casings and relates to a wall thickness inspection method for an aviation casing.

Background

The mounting surfaces of aviation case type products are provided with positioning holes and threaded holes, and the distances from the positioning holes and the threaded holes to the edges of the inner walls of the blanks are called wall thicknesses. The size of the wall thickness has several effects, one is to affect the strength of the threaded hole, and the other is to affect the tightness of the casing when sealing. Aircraft casing products typically have a wall thickness that is checked to ensure that the wall thickness meets the requirements. In the traditional method, wall thicknesses are measured one by using a vernier caliper, and then the measured data is compared with theoretical data to determine whether the measured data is qualified or not. However, the number of the positioning holes and the threaded holes of the casing products is large, and the number of the threads and the positioning holes of each casing product is about 300, so that a lot of time is wasted in measuring one by one. Moreover, the number of the casings produced in batches is large every year, and the time consumed for measuring the casings one by one is large. Moreover, after the measurement is carried out one by one, the measured values need to be compared with theoretical values by inspectors to determine whether the measured values are qualified, and due to the fact that the number of the measured values is large, the workload of the inspectors is increased, and errors are prone to being generated.

Disclosure of Invention

The invention develops a wall thickness inspection tool, uses a new shape comparison technology to measure the wall thickness, manufactures a special measuring tool, the measuring tool uses a pin hole to position, the inner wall shape is made according to the wall thickness, the edge shape of the inner wall of the measuring tool is designed into two measuring tools according to the minimum wall thickness and the maximum wall thickness, the measuring tool can judge the wall thickness according to the comparison between the measuring tool and the blank edge on the surface of a part, the measuring tool is used for measuring, a large amount of time is saved, moreover, an inspector does not need to compare the measured value with the theoretical value, the burden of the inspector is reduced, and the fatigue of.

Technical scheme

An aviation case wall thickness inspection method comprises the following steps:

1, selecting two positioning pin holes on a part as a reference, drawing the edge of a blank according to the minimum wall thickness of a part drawing, designing a measuring tool according to the positioning pin holes and the edge of the blank,

2 processing the measuring tool according to the design drawing,

and 3, two positioning pins are arranged on the measuring tool and matched with the positioning pin holes of the casing, and whether the hole wall is smaller than the minimum wall thickness is determined by comparing the position relation between the edge of the measuring tool and the edge of the part blank.

The material of the measuring gauge is steel,

the measuring tool is provided with a plurality of weight-reducing grooves while meeting the rigidity requirement,

the measuring tool is provided with an interference-preventing through hole according to the structure of the part.

The locating pin is a fine hole.

Technical effects

The measuring tool saves a large amount of time for measurement, and inspectors do not need to compare the measured value with the theoretical value, so that the burden of the inspectors is reduced, and the fatigue of the inspectors is reduced.

Drawings

FIG. 1 is a diagram of the wall thickness inspection method steps

The specific implementation mode is as follows:

1, selecting two positioning pin holes on a part as a reference, drawing the edge of a blank according to the minimum wall thickness of a part drawing, and designing a measuring tool according to the positioning pin holes and the edge of the blank.

2, processing the measuring tool according to the design drawing.

And 3, two positioning pins are arranged on the measuring tool and matched with the positioning pin holes of the casing, and whether the hole wall is smaller than the minimum wall thickness is determined by comparing the position relation between the upper edge of the measuring tool and the edge of the part blank. If the blank edge is inside the gauge, it indicates that the part wall thickness is greater than the minimum required wall thickness.

The measuring tool is made of steel, and the rigidity of the part is increased.

The measuring tool is provided with a plurality of weight reduction grooves while meeting the rigidity requirement, so that the weight of parts is reduced.

The measuring tool is provided with an interference-preventing through hole according to the structure design of parts, so that the situation that the measuring tool and the case cannot be tightly attached due to interference is avoided.

The locating pin is the smart hole, increases the measuring stability of measuring tool.

The locating pin be detachable.

The measuring tool is also provided with a bolt through hole.

The thickness of the measuring gauge is 20 mm.

The locating pin be detachable, the pin can only be changed in the pin wearing and tearing, improves the economic nature.

The measuring tool is also provided with a bolt through hole to prevent the interference of the bolt.