An inspection method for chemically milled weight-reducing grooves of parts
A technology of weight-reducing grooves and parts, which is applied in the inspection field of part chemical milling weight-reducing grooves, can solve the problems of low precision, difficulty, and high price, and achieve the effects of improving inspection efficiency, improving inspection accuracy, and reducing inspection costs
Active Publication Date: 2019-10-29
SHENYANG AIRCRAFT CORP
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Problems solved by technology
[0004] Due to the difficulty of using a ruler to measure the size of the chemical milling weight reducing groove, and the large number of chemical milling weight reducing grooves, it leads to the problem of low efficiency and low accuracy of using a ruler to test the chemical milling weight reducing groove. For complex curved surface shapes Parts that cannot be measured with a ruler need to be inspected with a CNC measuring machine. Due to the high price of the CNC measuring machine, the cost of using the CNC measuring machine to inspect the chemical milling weight-reducing groove is high.
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[0022] The present invention will be described in further detail below, a kind of inspection method of part chemical milling weight-reducing groove, comprises the following steps:
[0023] A method for inspecting weight-reducing grooves by chemical milling of parts, comprising the following steps:
[0024] In the first step, in the three-dimensional model of part 1, make the largest projection plane P of part 1, project the outer contour line a of the part on the projection plane P along the normal direction of the projection plane P, and obtain the projection line of the outer contour line of the part a1; Project the edge line b of the milling weight-reducing groove of the part onto the projection plane P along the normal direction of the projection plane P, and obtain the projection line b1 of the edge line of the milling weight-reducing groove of the part. Such as figure 1 shown.
[0025] In the second step, on the steel plate with a thickness of 10 mm to 20 mm, the outer...
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The invention relates to a method for inspecting a chemical milling lightening groove, and belongs to the technical field of mechanical measurement. The method includes the following steps: in a three-dimensional model of a part, obtaining a part outer contour line projection line a1 and a part chemical milling lightening groove edge line projection line b1; on a steel plate, making a part outer contour line slit A taking a1 as a center line a1, making a part chemical milling lightening groove edge line slit B taking b1 as a center line, and making a projection inspection plate; putting the part and the projection inspection plate on a support, and making a maximum projection plane P of the part parallel to the projection inspection plate; using light C to irradiate different positions ofthe slit A, so that the light spot center D formed on the surface of the part is located on a part outer contour line a, and using light C to irradiate different positions of the slit B, so that the light spot center E is formed on the surface of the part; and measuring the distance L between the part chemical milling lightening groove edge line b and the center E of the light spot, thereby completing the inspection of the part chemical milling lightening groove. The method for inspecting a chemical milling lightening groove is simple in operation, can be used for inspection of parts with different curvatures, improves inspection efficiency and accuracy, and reduces inspection cost.
Description
technical field [0001] The invention belongs to the technical field of mechanical measurement, and relates to a method for inspecting weight-reducing grooves by chemical milling of parts. Background technique [0002] Some parts of the aircraft have grooves for weight reduction, which are usually processed by chemical etching, so these grooves are called chemical milling weight reduction grooves. [0003] At this stage, when processing the chemical milling weight-reducing groove, first protect the surface of the part with glue, then use a carving knife to carve off the film according to the opening of the score line on the chemical milling model, and then put the part into the corrosive solution for chemical treatment. After corrosion processing and chemical milling weight reducing groove processing, it is necessary to use a ruler to measure the width and spacing of chemical milling weight reducing groove for inspection. [0004] Due to the difficulty of using a ruler to me...
Claims
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IPC IPC(8): G01B21/00G01B21/02
CPCG01B21/00G01B21/02
Inventor 张海欧王勇强
Owner SHENYANG AIRCRAFT CORP