A method for detecting the size of blade edge plate

Abstract

A blade edge plate size detection method comprises the following steps: step a, a base, two measuring blocks and two pressing plates are provided, a fan-shaped section blade is arranged on the base, the fan-shaped section blade is fixed, and the two cutting surfaces of the fan-shaped section blade are parallel to the molded surfaces of the two measuring blocks respectively; and step b, a go / no-gogauge is provided, the go / no-go gauge is of a strip-shaped structure, the two ends of the go / no-go gauge are respectively a go end and a no-go end, gaps between the two cutting surfaces of the fan-shaped section blade and the corresponding measuring blocks are plugged through the go / no-go gauge, and if the go end of the go / no-go gauge is through, and the no-go end of the go / no-go gauge is non-through, the fan-shaped section blade is qualified. The blade edge plate size detection method is convenient to operate, the repeated positioning is stable and reliable, the consistency of measurement results is good, and the measurement accuracy is ensured.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a method for measuring the size of edge plates of sector blades after cutting in the turbine production process of aero-engines. Background technique [0002] In the manufacturing process of aero-engines, for power turbines, the production process includes casting to obtain integral turbine blanks, uniformly cutting the entire turbine blanks to obtain multiple sector blades, and sealing the cut surfaces of sector blades The processing of the equal profile, and then the sector blades are assembled into a complete annular turbine piece. [0003] figure 1 It is a schematic diagram of the process principle of the cutting process of a power turbine, see figure 1 As shown, in the existing production process, the power turbine needs to be evenly cut into six identical segment blades 100, each of which includes an outer central hole 101 and two outer edge holes 102, Duri...

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Problems solved by technology

[0010] After the sector blade 100 is obtained by cutting, it is necessary to detect the characteristic dimensions of the positions where the distance between the cut surface of the sector blade 100 and the axis of the power turbine is specific values ​​D1 and D2, such as Figure 5 The distance dimensions L, L0, L1, L2, L3, and L4 of the flange surface are shown, among which L1, L2, L3, and L4 are direct measurement dimensions, and L and L0 are indirect measurement dimensions. The existing measurement methods are, in On the measuring tool, the inner circle and the outer circle of the fan-shaped blade 100 are clamped and positioned, and then the meter frame is used to drag the meter on the surface parallel to the two cutting surfaces for measurement. If the meter reading is not greater than 0.08, it is qualified. It is to transform the detection of linear dimension into the detection of surface profile. Since the ring is easily deformed during cutting, the existing measuring tools are likely to cause artificial clamping and measurement errors, and this is to provide a movement of the table frame parallel to the two cutting surfaces. surface, the measuring tool is complex in structure, bulky, and the operation steps are cumbersome, which is not conducive to the improvement of production efficiency

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