Radial Cutting Insert Holder Adjustment for Precise Bore Finishing
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Solution Overview
Problem
Existing cutting tools face limitations in precise setting of cutting inserts due to expansion requirements for elastic deformation or pivoting, which restricts the number of insert holders and results in imprecise contact point settings.
Innovation Solution
A cutting tool design featuring radially movable cutting insert holders with a transverse setting device, including a threaded drive and scale ring for precise positioning, allowing for compact installation and multiple insert holders in a small axial space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cutting insert holders are set by elastic deformation or pivoting, then the cutting insert position can be adjusted, but the axial expansion required limits the number of insert holders and reduces setting precision
Solution Approach 1:
The patent transitions from axial adjustment (one dimension) to radial adjustment (another dimension). The cutting insert holder is moved radially perpendicular to the rotational axis through a guide recess, enabling precise positioning without requiring axial expansion. This dimensional change resolves the contradiction by achieving high precision settings while maintaining compact axial dimensions.
Solution Approach 2:
The patent replaces the mechanical elastic deformation or pivoting systems with a threaded drive mechanism. The threaded sleeve and differential threaded spindle provide precise radial movement through screw threads, eliminating the need for elastic deformation mechanisms and their associated axial expansion requirements.
2Quantity of substance
If multiple cutting insert holders are arranged axially, then more inserts can be accommodated, but the axial space requirement increases
Solution Approach 1:
The patent enables multiple cutting insert holders to be arranged in a compact axial configuration by moving them radially instead of axially. The guide recesses and radial adjustment mechanism allow multiple holders to be positioned along the rotational axis without requiring proportional axial expansion, as each holder occupies minimal axial space.
3Length of moving object
If a compact design is used to reduce axial space, then installation space is reduced, but setting precision may be compromised
Solution Approach 1:
The patent employs a threaded drive mechanism with differential threaded spindle and threaded sleeve to achieve precise radial positioning within a compact axial footprint. The screw thread mechanism provides fine adjustment capability and high positioning precision without requiring large axial dimensions, resolving the contradiction between compactness and precision.
Solution Approach 2:
The patent introduces a threaded sleeve as an intermediary component between the differential threaded spindle and the cutting insert holder. This mediator translates rotational movement of the spindle into precise radial displacement of the holder, enabling high precision positioning within compact dimensions through mechanical advantage.
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 and accurate setting of cutting inserts with a wide range of positions, accommodating multiple inserts in a compact form, enhancing machining precision and efficiency, particularly in bore finishing and bearing tunnel machining.
Implementation Method 1
The setting device has a setting element, which can be set inside the main part transversely to the rotational axis of the main part as well as transversely to the direction of movement of the cutting insert holder, and supports the cutting insert holder
Implementation Method 2
The or each cutting insert holder is mounted resiliently on the main part via one or several compression springs, which extend in the direction of movement of the cutting insert holder
Data Source
AI summary
The invention relates to a cutting tool comprising a main part that can be rotationally driven about a rotational axis, at least one cutting insert holder mounted on the main part such that it can be radially adjusted, and an adjusting device for adjusting the position of the cutting insert holder relative to the main part. The cutting insert holder is mounted in a guide recess in the main part such that it can be moved transversely, preferably radially, to the rotational axis, and the adjusting device has an adjusting element that is arranged such that it can be moved inside the main part transversely to the rotational axis and transversely to the displacement direction of the cutting insert holder and supports the cutting insert holder.