Milling Insert Cam Indexing Without Spring Clamping Loss
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Solution Overview
Problem
Milling tools require manual indexing of cutting inserts, which is time-consuming and costly, and the use of springs for indexing reduces stiffness and clamping force, leading to performance and repeatability issues.
Innovation Solution
An indexing system with a tool body, cam, carrier rod, and indexable cutting insert, where the cam rotates to move the carrier rod between positions, allowing the cutting insert to switch between clamped and indexing positions without manual detachment, using a mechanism that maintains stiffness and clamping force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual indexing of cutting inserts is performed, then each cutting insert can be individually indexed, but the milling tool must be taken out of operation during indexing, resulting in loss of time and reduced productivity
Solution Approach 1:
The indexing system allows the cutting inserts to be indexed automatically within the tool body without requiring manual removal or external intervention. The cam mechanism enables the inserts to self-index by rotating to different positions, allowing the tool to remain in operation and eliminating downtime for indexing operations
Solution Approach 2:
The system transforms the static indexing process into a dynamic one by using a rotatable cam mechanism that can shift cutting inserts between active and inactive positions during operation, enabling continuous tool functionality while performing indexing operations
2Ease of operation
If springs are used to move inserts between clamped and indexing positions, then indexing can be achieved, but the overall cost of manufacturing increases and the stiffness and clamping force are reduced
Solution Approach 1:
The invention removes the spring component from the indexing mechanism entirely, replacing it with a cam-based system that achieves insert movement without elastic elements, thereby maintaining full clamping force and stiffness while enabling indexing functionality
Solution Approach 2:
The spring-based elastic mechanical system is replaced with a cam-based rigid mechanical system, substituting flexible force transmission with direct geometric force transmission, which maintains structural stiffness and clamping force while achieving the same indexing function
3Ease of operation
If springs are used for indexing operations, then indexing functionality is provided, but the complexity associated with assembling and maintaining the device increases
Solution Approach 1:
By removing the spring component from the system, the invention eliminates the associated assembly and maintenance complexities related to elastic elements, reducing the overall device complexity while preserving indexing functionality through the simpler cam mechanism
Solution Approach 2:
The cam mechanism uses simple, durable components with no wear-prone elastic elements, reducing maintenance requirements and assembly complexity compared to spring-based systems that require periodic replacement and adjustment
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 simultaneous indexing of all cutting inserts without tool removal, improving productivity and reducing assembly complexity while maintaining performance and repeatability.
Implementation Method 1
The cam is attached to the tool body, is disposed within the tool body central passageway, and is rotatable around the tool body central axis between a cam first position and a cam second position
Implementation Method 2
The carrier rod is partially disposed within the bore, contacts the cam, and is moveable between a carrier rod first position and a carrier rod second position
Implementation Method 3
the indexable cutting insert is rotatable around the insert center axis
Data Source
AI summary
An example indexing system has a tool body, a cam, a carrier rod, and an indexable cutting insert. The tool body is rotatable around a tool body central axis and has a bore. The cam is attached to the tool body and is rotatable around the tool body central axis between a cam first position and a cam second position. The carrier rod is partially disposed within the bore, contacts the cam, and is moveable between a carrier rod first position when the cam is in the cam first position and a carrier rod second position when the cam is in the cam second position. The indexable cutting insert is attached to the carrier rod and is moveable between a clamped position when the carrier rod is in the carrier rod first position and an indexing position when the carrier rod is in the carrier rod second position.