Reverse Adjustment Method of Cavity of Compressor Experimental Blade Mold
An adjustment method and compressor technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as low blade forming accuracy, and achieve the effect of improving forming accuracy
Inactive Publication Date: 2016-04-20
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
[0005] In order to overcome the deficiency of low blade forming accuracy of the existing compressor test blade mold cavity design method, the present invention provides a reverse adjustment method for the compressor test blade mold cavity
Method used
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Embodiment Construction
[0025] refer to Figure 1-7 . The present invention is described in detail by taking a certain type of aeroengine compressor resin experimental blade mold cavity as an example.
[0026] Step 1. Use a three-coordinate measuring machine to measure the airfoil profile of the initial mold trial production blade, and import the measured point cloud data into the UG software;
[0027] Step 2. Open the blade CAD model with UG, such as figure 2 As shown, the blade measurement data is imported into UG and registered with the blade CAD model, the result is as follows image 3 shown;
[0028] Step 3. Make a group of parallel planes perpendicular to the main axis direction at intervals of 3 mm from 15 mm to 95 mm in the Z direction, and obtain intersection curves with the blade CAD model and the measurement model along the model height direction to obtain 27 measurement models and CAD models. Airfoil curve; blade CAD model at Z=45mm, measurement model blade curve such as Figure 4 s...
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The invention discloses a method for reversely adjusting a die cavity for an experimental blade die of an air compressor, which is used for solving the technical problem of low blade molding precision existing in the conventional die cavity design method of experimental blade dies of air compressors. According to the technical scheme of the invention, the method comprises the following steps: measuring blade body data; accurately aligning a CAD (Computer Aided Design) model with a measuring point cloud; establishing a blade measuring model by using the measured data; intercepting a section along the height direction of the model to obtain multiple groups of blade profile curves on which the measuring model and the CAD model are at the same height; segmentally treating the blade profile curves and reversely adjusting; lofting the curved surfaces of the blade profile curves to obtain a reversely-adjusted die cavity; and machining a blade die by using the reversely-adjusted die cavity. Corresponding points on a deformed blade section and the die cavity surface of the die are found according to the blade profile design requirement of the blade and the deformation characteristics, and compensation of blade molding deformation and reverse adjustment of the die cavity are realized on the basis of a displacement vector, so that the blade molding accuracy is increased.
Description
technical field [0001] The invention relates to a method for reverse adjustment of a mold cavity, in particular to a method for reverse adjustment of a mold cavity of an experimental blade of a compressor. Background technique [0002] In the field of aero-engines, the complex shape of blade parts has an important impact on the aerodynamic performance of aero-engines; in order to judge the design of aero-engine compressors, it is necessary to use injection molding to form high-precision resin blades on the compressor low-speed test bench Carry out aerodynamic performance experiments; due to the characteristics of the resin-based composite material itself and the complexity of the injection molding process, warpage and deformation will inevitably occur during the solidification and cooling process of the resin blade; The deformation of the blade shows the law that the leading edge and the trailing edge shrink to the blade pot in different degrees, resulting in the excessive s...
Claims
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IPC IPC(8): G06F17/50
Inventor 汪文虎赵德中崔康靳洪超裴景东王姝成浪永王渊彬解晓娜张艳
Owner NORTHWESTERN POLYTECHNICAL UNIV