A method for processing a half-precision boring of a deep hole with butt joint steps to reduce straightness error

By collecting and analyzing various parameters of the boring bar in real time and optimizing the dynamic following response of the follower post, the straightness error caused by the bending deformation of the boring bar during the cutting process is solved, and the stability of semi-finish boring of deep and long holes is improved.

CN122033694BActive Publication Date: 2026-06-16HANDAN HENGGONG METALLURGICAL MACHINERY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HANDAN HENGGONG METALLURGICAL MACHINERY CO LTD
Filing Date
2026-04-20
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing movable follow post control methods are difficult to effectively reduce straightness errors, mainly because the boring bar is easily affected by radial cutting force, friction and cutting chatter during the cutting process, which causes the boring bar to flex and deform, and thus causes the hole axis to deviate.

Method used

By collecting parameters such as feed rate, rotational speed, cutting direction, vibration displacement, deformation angle, total radial cutting force, follower travel speed, cutting fluid flow rate, cutting fluid temperature, and ambient temperature in real time, the motion and stress state of the boring bar are analyzed, synchronization characteristics and instability are obtained, the support demand index is corrected, and the dynamic follower response of the follower is optimized.

Benefits of technology

It enables directional and quantitative analysis of the stability changes of the boring bar, suppresses the attitude fluctuation of the boring bar, and effectively reduces the straightness error in the semi-finish boring process of deep and long holes.

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Abstract

The present application relates to the technical field of metal cutting in machining, in particular to a method for reducing straightness error of a head-to-head step deep hole semi-finishing boring, comprising: obtaining the feed speed, rotation speed, cutting direction, vibration displacement, deformation angle, total radial cutting force of the boring bar at each moment, and the moving speed of the follow-up tool holder, the flow rate of cutting fluid, the temperature of cutting fluid, and the ambient temperature; obtaining the initial support demand index of each cutting force at each moment through the feed speed, rotation speed, cutting direction, vibration displacement, deformation angle, total radial cutting force, and moving speed of the follow-up tool holder; and obtaining the dynamic follow-up response coefficient of the follow-up tool holder at each moment in combination with the flow rate of cutting fluid, the temperature of cutting fluid, and the ambient temperature, which is used for regulating and controlling the follow-up tool holder, the present application regulates and controls the follow-up tool holder by analyzing multi-dimensional data in machining, thereby suppressing the posture fluctuation of the boring bar and effectively reducing the straightness error in the semi-finishing boring process of deep holes.
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