The method of correcting the deflection of boring and slender deep holes

Abstract

The invention relates to a method for correcting deviation of a boring slender deep hole. Sharp knife holes guiding and smooth knife holes guiding are carried out, and a supporting sleeve, sharp knifeholes guiding and smooth knife holes guiding are fixedly wrapped on the outer layer of a boring rod joint; three sharp knives and an smooth knife are arranged on a boring head, the first sharp knifeis reversely installed, a wood key and a plastic key are arranged in the upper and lower key grooves of the boring head, a deep hole drilling and boring machine is started to enable the workpiece to be bored to rotate, the sharp knife is in a horizontal orientation, and the boring head is arranged in the formed hole; a boring rod is supported by the supporting sleeve and the plastic key in a double-stable mode during boring, the boring head which sinks is supported, the boring head is tightly attached to the hole through the thermal expansion of the plastic, a gap is reserved between the woodkey and the hole wall, the boring head can freely float, and the straightness requirement of the hole is effectively controlled; and measuring strips are arranged at equal intervals on the boring hole, primary wall thickness difference measurement data are measured and recorded to see whether the hole is deflected and the direction of hole deflection is judged, so that deviation rectification is carried out. The deviation correcting device is good in deviation correcting effect. For the propeller shaft deep hole with the length of 23m and the slenderness ratio of 153, the straightness of the hole reaches 0.87mm.

Description

technical field [0001] The invention relates to a method for correcting the deflection of boring a long and slender deep hole. Background technique [0002] The conventional process route for deep hole finishing is: drilling→rough boring→semi-finish boring→fine boring→arranging and grinding holes. After drilling, the straightness of the hole (straightness processing During the process, the wall thickness difference is used to control) within the range required by the drawing, because the machining allowance of the hole in the semi-finish boring and subsequent stages is small, it is likely to face the risk of deep hole processing failure, and it is difficult to correct the deflection of the hole . In the process of deep hole finishing, the deviation of the hole or the deviation cannot be corrected almost always, especially the slender deep hole with a relatively large slenderness. [0003] The main reason for the correction of hole deflection in the process of deep hole fin...

AI Technical Summary

Problems solved by technology

In the processing process, the maximum wall thickness difference of the hole was as high as 11mm by using the conventional processing method of correcting the deflection of the deep hole. After 15 days of repeated investigations, the wall thickness difference of the hole was still as high as 7mm, so the conventional method could not correct the wall thickness of the hole. Thickness difference, improving the straightness of the hole, it is also extremely difficult to meet the requirements of the final drawing

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