Comparison machining method for aluminum alloy discs and rings

Abstract

The invention belongs to the technical field of numerical control machining, and relates to a comparison machining method for aluminum alloy discs and rings. The method includes the steps: machining a comparison reference part for comparison measuring and machining at an optional ambient temperature; measuring and recording a deviation compensation value A of the size of the comparison reference part in a clamped machining state and in a loosened free state; measuring the comparison reference part after keeping the comparison reference part at a constant temperature, and calculating a deviation compensation value B of the comparison reference part and a standard assembly part according to measuring results; and during practical machining, placing the comparison reference part on a machining site, and performing compensation machining for parts to be machined according to the deviation compensation value A and the deviation compensation value B. By the aid of the comparison machining method, the problem of machining deformation of easily deforming movable parts like aluminum alloy discs and rings of helicopters can be solved, dimensional precision and uniformity are ensured, the requirement of assembly coordination is met, and high numerical control machining efficiency can be obtained.

Description

technical field [0001] The invention belongs to the technical field of numerical control processing, and relates to a comparison processing method for helicopter aluminum alloy disk ring parts. Background technique [0002] At present, there are some aluminum alloy high-precision and easy-to-deform disk ring parts in the moving parts of the helicopter. During CNC machining, it is affected by the ambient temperature of the workshop, the temperature of the machine tool guide rail, and the temperature of the cooling system. The temperature difference in the processing area of ​​the workshop in different seasons exceeds 10 degrees. There are also several degrees of temperature change, and the deformation of parts due to temperature changes during processing is obvious. According to the existing processing method, the processing part is measured during processing, compared with the design size required by the drawing, and the processing allowance is judged and repeatedly correcte...

AI Technical Summary

Problems solved by technology

According to the existing processing method, the processing part is measured during processing, compared with the design size required by the drawing, and the processing allowance is judged and repeatedly corrected based on the experience of the workers. The labor intensity is high and the processing efficiency is low. The temperature difference between the coordinate measurement room and the assembly environment leads to the out-of-tolerance of the three-coordinate measurement of the qualified parts processed on the CNC machining site, and the interchangeability coordination assembly is also prone to problems, the accuracy is difficult to meet the assembly requirements, and the product quality stability is extremely poor

At the same time, such high-precision parts are generally processed by high-precision five-axis CNC machining equipment. The low processing efficiency directly leads to a sharp drop in the utilization rate of high-end CNC machining equipment, resulting in a waste of high value-added CNC machining resources.

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