A temperature compensation method for machining aluminium alloy components

Abstract

The invention provides a temperature compensation method for machining aluminium alloy components. The method comprises the steps of (1) measuring temperatures of a standard component and a to-be-machined component; (2) measuring a dimension of the to-be-machined component after making a zero-setting of a measuring device according to the standard component; (3) making temperature compensation calculation according to formulas to obtain a conversion dimension; (4)doing compensation calculation according to the component temperature, the standard component temperature, the actual value of the component dimension under a working temperature and the conversion dimension. In the method, the conversion dimension is calculated from the relationship among temperature, coefficient of linear expansion, and nominal dimension. The actual value of the component dimension measured under a working temperature is converted to an actual value of the component dimension under a standard temperature, thereby realizing precise measurement. In component machining process, the value of the sum of the component nominal dimension and the conversion dimension is taken as a dimension value required for the component machining, thereby realizing the aim of precise machining. The method in the invention can be applied to the aluminium alloy components machining with high precision requirements.

Description

Technical field [0001] The invention belongs to the technical field of mechanical processing, and particularly relates to a temperature compensation method for cutting and processing aluminum alloy parts. Background technique [0002] Some aluminum alloy parts are complex in structure, large in diameter, and thin in wall thickness. At present, when processing such parts, the actual value of the part size after on-site processing is usually inconsistent with the actual value of the part detected in the inspection room at the standard temperature. The reason is The aluminum alloy parts have poor rigidity, weak strength, and large linear expansion coefficient. After processing at non-standard temperature, the actual value of the part size and the actual value of the part detected at the standard temperature (20℃) are very large. Errors cause the parts to be out of tolerance and scrapped. Summary of the invention [0003] In view of the above-mentioned problems in the prior art, the ...

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Problems solved by technology

[0002] Some aluminum alloy parts have complex structures, large diameters, and thin walls. At present, when processing such parts, the actual value of the part size after on-site processing is usually inconsistent with the actual value of the part at the standard temperature detected in the testing room. The reason is that Aluminum alloy parts have poor rigidity, weak strength, and large linear expansion coefficient. After processing at non-standard temperature, the actual value of the part size is very different from the actual value of the part measured at the standard temperature (20°C). error, resulting in parts being scrapped due to out-of-tolerance dimensions

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