Centrifugal-Force Boring Bar for Precise Insert Setup
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Solution Overview
Problem
Existing actuatable boring bars lack the precision to accurately set up cutting insert cartridges in a cutting position, hindering high-precision machining operations.
Innovation Solution
A boring bar design that utilizes centrifugal force to selectively place cutting insert cartridges in either a cutting or non-cutting position, with a control system and fluid connection circuit to manage the actuation and lubrication, allowing for accurate setup of cutting inserts in the cutting position without external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a known actuatable boring bar is used, then the cutting insert cartridge can be moved between cutting and non-cutting positions, but the cutting insert cannot be set up with sufficient accuracy
Solution Approach 1:
The boring bar employs a dynamic actuation system that responds to centrifugal force generated during rotation. A control element moves between control positions based on rotation speed, automatically positioning the cutting insert cartridge in cutting or non-cutting positions without manual intervention, thereby achieving both high setup accuracy and ease of operation
Solution Approach 2:
The system uses the rotation of the boring bar itself to generate the centrifugal force that actuates the control element. The actuation system is self-regulating, automatically transitioning between states based on operational conditions without requiring external control devices or special setup equipment
2Extent of automation
If centrifugal force actuation is used, then automatic positioning is achieved, but precise setup control is lost
Solution Approach 1:
The actuation system incorporates implicit feedback through the centrifugal force mechanism, where the rotation speed of the boring bar directly influences the position of the control element. This automatic feedback loop ensures precise positioning based on actual operational conditions, maintaining both automation and precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise placement and operation of cutting inserts, improving machining accuracy and eliminating the need for special setup devices by leveraging centrifugal force and fluid control to manage the position of cutting inserts based on rotation speed.
Implementation Method 1
a boring bar actuatable by a centrifugal force generated by a rotation of the boring bar about a rotation axis
Implementation Method 2
when the coolant bore is supplied with coolant, the coolant is diverted into the cutting region of the tool
Data Source
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Figure 5
AI summary
The present disclosure relates to an actuatable boring bar (10) configured to place a cutting insert cartridge (20) received onto the boring bar in a cutting position when the centrifugal force generated by the rotation of the boring bar about the rotation axis (A) reaches a centrifugal force threshold and in a non-cutting position when the centrifugal force generated by the rotation of the boring bar about the rotation axis is below the centrifugal force threshold, the boring bar being further configured so that the cutting insert cartridge (20) can be set-up onto the boring bar (10) in the cutting position.