A Turbine Blade Machining and Online Inspection System Based on Numerical Control Machining Device

Abstract

The invention relates to a turbine blade processing and on-line detection system based on a numerical control processing device. The turbine blade processing and on-line detection system mainly comprises an industrial control computer, a circuit switching module, a digital value I / O (input / output) card, a numerical control machine tool, a laser displacement sensor and the like. The circuit switching module realizes switching between a blade processing system and an on-line detection system; two working procedures of processing and detection can be finished by only clamping and positioning a blade once; the blade processing and detection working procedures can be implemented in a numerical control system; the generation algorithms of a cutter trace point and a laser detection point are consistent; furthermore, the speed, the acceleration, the pause time, the position precision and the like of a target detection point under the two states of processing and detection can be matched; deflection, which is caused by mis-match of two system parameters, between an actual laser detection point and a theoretical point to be detected is avoided; the substantial cost for independent adoption of the detection system and system development and maintenance is avoided.

Description

technical field [0001] The invention relates to the field of processing and detection of turbine blades, in particular, a blade detection system using a laser displacement sensor as a detection element is integrated into a blade processing system by using a circuit switching module, thereby realizing the integration of blade processing and detection. Background technique [0002] The profile of the turbine blade is a spatial profile designed through complex numerical calculations based on the theories of aerodynamics and fluid mechanics. Its accuracy directly affects the energy conversion efficiency of the corresponding equipment. key. At present, the processing and testing of blades are two independent systems, that is, after a batch of blades are processed in the processing system, they are then sampled and tested in the testing system. The commonly used processing system is a five-axis CNC machine tool, and the detection system includes a three-coordinate contact detecti...

AI Technical Summary

Problems solved by technology

When testing rough-machined and semi-finished blades, the wear of the contacts is relatively large, which not only increases the cost but also affects the subsequent detection accuracy as the amount of wear increases.

Therefore, it is often used for blade detection in finishing machining, and the detection range is small.

[0006] (4) The binocular stereo vision detection system has high requirements on the environment, and it is easy to introduce error points. It needs to analyze and calculate tens of thousands of point cloud data, with large errors and low precision.

[0007] (5) The operation of the three-coordinate contact detection system and the binocular stereo vision detection system are complex, especially when the blade is clamped and positioned, special equipment is required, the requirements for operators are high, and the system maintenance is expensive, which increases the cost , not easy to purchase and use in large quantities

Images