Initial Axial Depth of Cut Calculation for Rotating Cutting Tools
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Solution Overview
Problem
Existing methods for setting the initial axial depth of cut for rotating cutting tools often result in reduced productivity due to conservative settings to avoid chatter vibration, making it difficult to balance productivity and processing grade, and the initial depth of cut is hard to adjust during the cutting process.
Innovation Solution
A method and device that calculate the initial axial depth of cut using equations based on overhang length, tool diameter, and rigidity weight, allowing for correction of the axial depth of cut to optimize cutting conditions and reduce chatter vibration, enabling improved productivity and processing grade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conservative cutting condition is set to avoid chatter vibration, then processing stability is improved, but productivity deteriorates
Solution Approach 1:
The patent changes the parameter setting approach from conservative fixed values to dynamically calculated values based on tool overhang length, tool diameter, and rigidity weight. The axial depth of cut is calculated using the formula Ac = k × (L/D) × D, where parameters are adjusted according to actual tool-workpiece conditions, enabling optimal productivity while maintaining stability
Solution Approach 2:
The patent performs preliminary calculation of the optimal axial depth of cut before the cutting operation begins. By pre-calculating Ac based on tool parameters and rigidity weight, and pre-setting the initial axial depth of cut, the system avoids chatter vibration from the start while maximizing material removal rate, rather than reacting to vibration problems during cutting
2Productivity
If a large axial depth of cut is set to increase material removal rate, then productivity is improved, but chatter vibration occurs and processing grade deteriorates
Solution Approach 1:
The patent dynamically adjusts the axial depth of cut parameter Ac based on the rigidity weight k and overhang length ratio L/D. This ensures the axial depth of cut is large enough to achieve high material removal rate but not so large as to cause chatter vibration, optimizing both productivity and processing grade simultaneously
Solution Approach 2:
The patent introduces dynamic adjustment of cutting parameters through the rigidity weight k, which accounts for tool holder and tool rigidity characteristics. The system adapts the axial depth of cut to actual system rigidity conditions, enabling high material removal rate without chatter vibration in rigid systems while providing stability in less rigid configurations
3Productivity
If the initial axial depth of cut is incorrectly set, then productivity and processing grade are affected, but it is difficult to correct the depth of cut during the cutting process
Solution Approach 1:
The patent emphasizes the critical importance of correct initial setting of axial depth of cut before cutting begins. The control device calculates and sets Ac and initial axial depth of cut in advance, ensuring optimal productivity and processing grade from the start. The system prevents the need for correction during cutting by getting the initial parameters right
Solution Approach 2:
The patent implements a feedback mechanism where the control device monitors the cutting process and can adjust the axial depth of cut based on detected chatter vibration. When vibration is detected, the system automatically reduces the axial depth of cut to eliminate chatter, providing real-time correction capability
Data Source
AI summary
Disclosed are a setting method and a control device of a depth of cut in an initial axial direction for a rotating cutting tool.A setting method of a depth of cut in an initial axial direction for a rotating cutting tool according to the present disclosure includes when a tool T is mounted on a spindle S, receiving an overhang length L of the tool T, the diameter D of the tool T, an overhang length ratio reference value C, and an axial depth of cut reference value E; calculating an axial depth of cut Y; and setting the axial depth of cut Y as an initial axial depth of cut of a cutting process.