Arcuate Cutting Tool Insert with Rigid Clamping Jaws
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting tools face challenges in achieving a compact, mechanically stable insert seat with easy exchangeability, as they often require laborious clamping mechanisms and may compromise on stability due to elastic clamping jaws and additional machining steps for expansion slots.
Innovation Solution
A cutting tool design featuring rigid upper and lower clamping jaws that form an arcuate receptacle for the cutting insert, allowing self-clamping without the need for expansion slots, ensuring a mechanically stable and compact construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If elastic clamping jaws with expansion slots are used to enable easy insert exchange, then ease of operation is improved, but device complexity and loss of substance increase due to additional machining steps and material removal
Solution Approach 1:
The invention removes the expansion slots from the holder structure, extracting the problematic feature that caused complexity and material loss. The holder is designed with a solid, slot-free construction that eliminates the need for elastic clamping jaws while maintaining easy insert exchange capability through the spherical insert design
Solution Approach 2:
Instead of making the clamping jaws elastic to enable insert exchange, the invention inverts the approach by making the insert itself spherical and enabling it to be easily inserted and retained through its shape and the holder's recess geometry, eliminating the need for elastic deformation of the holder
2Reliability
If clamping screws are used to secure the cutting insert, then reliability of clamping is improved, but ease of operation deteriorates due to laborious manual tightening and loosening
Solution Approach 1:
The spherical cutting insert design enables self-clamping functionality where the insert is automatically retained in the holder through its spherical shape and the complementary recess geometry, eliminating the need for manual clamping screw operations while maintaining secure holding during machining
3Ease of operation
If expansion slots are provided in the holder for elastic clamping jaws, then ease of operation is improved, but manufacturing precision and production complexity worsen due to additional machining steps
Solution Approach 1:
The invention completely removes the expansion slots from the holder design, eliminating the additional machining steps required to create them. The holder is manufactured as a solid structure without slots, significantly simplifying the manufacturing process while achieving the same functional goal of secure insert retention
Data Source
AI summary
A cutting tool comprising a holder (12) having a slot-shaped, arcuate receptacle (16), with respectively a lower and an upper bearing surface (36, 38) attached to rigid clamping jaws (18, 20) of the holder (12), for the reception (16) of a cutting insert, (14) and a cutting insert (14) having an arcuate shank (22) with lower and upper locating face (32, 34), which cutting insert is arranged exchangeably in the receptacle (16), and having a cutting head (24) with cutting edge (26), which cutting head is disposed on a workpiece-side end (44) of the shank (22), wherein the arcuate receptacle (16) and the arcuate shank (22), measured respectively on the lower bearing surface (36) of the receptacle (16) and the lower locating face (32) of the cutting insert (14), extend respectively over at least 90°, wherein the receptacle (16) extends over a larger angular range than the shank (22) of the cutting insert (14), and wherein the shank (22) is held in the receptacle (16) such that the holder-side end (28) of the shank (22) is distanced from the holder-side end (30) of the receptacle (16).