A temperature compensation method for machining aluminium alloy components
A technology for temperature compensation of aluminum alloy parts, which is applied in the field of temperature compensation of aluminum alloy parts for cutting and processing, and can solve problems such as complex structure, poor rigidity, and large diameter of aluminum alloy parts
Inactive Publication Date: 2012-07-25
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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[0002] Some aluminum alloy parts have complex structures, large diameters, and thin wall thicknesses. 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). Errors, resulting in parts being out of tolerance and scrapped
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[0019] The processed parts are made of aluminum alloy, the maximum diameter is Φ1167.0284±0.127, and the diameter of a certain place to be processed is Φ1145.7432, the tolerance is ±0.05, and the standard part is tool steel;
[0020] The coefficient of linear expansion of aluminum alloy parts is 0.0000225, and the coefficient of linear expansion of tool steel as standard parts is 0.0000117; the specific working process is as follows:
[0021] 1) Measure the temperature of the standard part and the temperature of the processed part, expressed in Celsius;
[0022] Use a contact temperature measuring instrument to measure the temperature of the part, and record the actual temperature value after the reading is stable. The temperature of the part is 24°C; the material of the standard part is tool steel, use a contact temperature measuring instrument to measure the temperature of the standard part, and wait for the reading to be stable Then record the actual value of the temperatur...
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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 in particular relates to a temperature compensation method for cutting and processing aluminum alloy parts. Background technique [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). The error will cause the part size to be out of tolerance and be scrapped. Contents of the invention [0003] In view of the problems existing in the above-men...
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IPC IPC(8): G01B21/00G01D3/028
Inventor 邸阅文刘鸣陈桂荣叶红雨魏晓丽
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION