Thread Milling Cutter Layout With Axial Insert Planes
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Solution Overview
Problem
Existing thread milling cutters face limitations in efficiency and cost due to the restricted number of cutting inserts, material wear, and complexity in manufacturing, particularly for smaller diameters, where one-piece cutters are less efficient and insert-based cutters lack stability and are expensive.
Innovation Solution
The design incorporates multiple axially spaced radial planes with standard triangular cutting inserts, allowing for increased cutting corners and efficient thread production, using standard inserts that can be modified for specific thread profiles, and optimizing insert placement for reduced vibration and enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If thread milling cutters use replaceable cutting inserts, then the cost-effectiveness and replaceability of worn cutting inserts is improved, but the number of cutting inserts is limited due to space constraints on the cylindrical cutting element
Solution Approach 1:
The patent transitions from a two-dimensional arrangement of cutting inserts on the cylindrical surface to a three-dimensional arrangement by adding axial spacing between radial planes. This allows cutting inserts to be distributed across multiple axial levels, significantly increasing the total number of inserts that can be accommodated on the cutting element without compromising stability or space availability.
2Productivity
If thread milling cutters use one-piece construction with numerous cutting cams and teeth, then the efficiency and number of cutting teeth is improved, but the cost and complexity of manufacturing and reconditioning increases
Solution Approach 1:
The patent divides the cutting element into modular components by implementing multiple radial planes with cutting inserts at different axial positions. This segmentation allows each radial plane to be independently configured and maintained, enabling easier reconditioning and replacement of specific cutting insert sets without affecting the entire tool, thereby reducing overall complexity and cost.
3Stability of the object's composition
If cutting rings and spacer rings are used in multi-part cutting elements, then the stability is improved, but the radial dimensions occupy large portion of the diameter and limit application to very large thread diameters
Solution Approach 1:
The patent resolves the diameter constraint by moving the stabilization mechanism from the radial dimension to the axial dimension. By spacing cutting inserts across multiple axial levels rather than distributing them only radially, the design achieves enhanced stability through axial distribution without requiring excessive radial space, thereby enabling application to smaller thread diameters.
Data Source
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AI summary
The invention relates to a thread milling cutter with a base body consisting of a shank (1) and a cutting part (2) which is cylindrical in its basic form, and with an axis of rotation (3) and several cutting teeth spaced apart in the circumferential direction, which are arranged on the cutting part (2) in at least two different radial planes (4) extending perpendicular to the axis of rotation (3).In order to create a thread milling cutter with the aforementioned features, which combines the advantages of the high work efficiency of one-piece thread milling cutters with a multitude of cutting teeth and cutting cams with the advantages of thread milling cutters with indexable inserts, without being limited to large diameters, it is proposed according to the invention that the cutting part (2) has at least 2 seats (6) for receiving a standard cutting insert (5) in each of at least two different radial planes and that the cutting teeth are formed by cutting corners (15) of standard cutting inserts (5).