An automatic milling method for high-precision blind holes

Abstract

The invention discloses an automatic milling processing method for a high-precision blind hole, belonging to the field of numerical control processing. Including S1, part clamping, establishment of processing coordinate system; S2, initial hole processing; S21, determination of initial hole diameter; S22, selection of initial hole milling tool; S23, initial hole processing; S3, high-precision hole automatic milling processing; S31: Determine the precision hole automatic milling tool; S32, initial variable assignment; S33, variable milling hole; S34, probe measurement aperture; S35, compare with the theoretical value; compare the actual aperture measured by the probe with the theoretical value of the fine hole, If the requirements are not met, the iterative calculation of the variables will be performed, and the values ​​will be reassigned, and the operations of steps S32-S35 will be repeated; if the requirements are met, the processing will be completed. The invention completes the milling of the initial hole and the final hole by means of a milling cutter, and the size of the final hole is guaranteed by the on-line detection of the probe and repeated iterations of the machining aperture, avoiding manual intervention, ensuring the processing quality and improving the processing efficiency.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to an automatic milling method for high-precision blind holes. Background technique [0002] With the development of modern industrial manufacturing level, the design, manufacture and assembly requirements of the new generation of aviation weapons and equipment are getting higher and higher; many aviation structural parts are designed with high-precision blind holes to meet the assembly requirements of aviation products. The bottom surface of this type of hole is flat, and the cylindrical surface and the bottom plane are smoothly transitioned by the bottom angle R. The hole diameter ranges from φ4mm to φ600mm, and its precision requirements are between standard tolerance levels IT6~IT11. [0003] Generally, precision holes above H9 are usually processed by drilling, reaming or boring. The maximum diameter of the drill is only 22mm, and the highest precision is H7, which cannot ...

AI Technical Summary

Problems solved by technology

[0003] Generally, precision holes above H9 are usually processed by drilling, reaming or boring. The maximum diameter is only 22mm, and the highest precision is H7, which cannot meet the precision requirements of the flat-bottomed hanging hole, and the front section of the reamer and the reamer have guiding structures, so blind holes cannot be produced

In addition, the hole making method of boring requires multiple manual interventions, including hole diameter measurement and adjusting the diameter of the boring tool. The final size of the hole is completely guaranteed by the worker's operation, which is not only inefficient but also has a high quality hidden danger

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