Modular Wood Milling Cutter With Replaceable Drill Bit
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Solution Overview
Problem
Current woodworking tools, particularly milling cutters, face challenges such as high production costs, limited flexibility, excessive spindle load, and reduced productivity due to their monoblock design and unfavorable cutting geometry, leading to premature wear and inefficient machining processes.
Innovation Solution
A modular, two-part tool design featuring a lightweight first tool body made of light metal or fiber-reinforced plastic and a replaceable drill bit made of stainless steel or aluminum, with adjustable cutting edge supports for improved cutting geometry and ease of maintenance, allowing for higher operating speeds and increased productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a monoblock tool design is used, then structural strength and rigidity are improved, but tool weight increases and manufacturing cost increases
Solution Approach 1:
The tool is divided into multiple segments: a tool body and a separately mountable cutting head with cutting edges. This allows the heavy steel tool body to be separated from the cutting elements, enabling weight reduction while maintaining structural strength. The cutting head can be made from lighter materials or designed with optimized mass distribution.
Solution Approach 2:
The patent employs different materials for different parts of the tool. The tool body may use high-strength steel for rigidity, while the cutting head or other components could utilize lighter materials such as aluminum alloys, titanium, or composite materials, achieving a balance between strength and weight.
2Stability of the object's composition
If a monoblock tool design is used, then structural rigidity is improved, but manufacturing time and cost increase
Solution Approach 1:
By segmenting the tool into a reusable tool body and replaceable cutting head, the manufacturing process is divided into independent stages. The tool body can be manufactured once with high precision, while the cutting head can be produced separately using more efficient processes, reducing overall manufacturing time and cost.
Solution Approach 2:
The cutting head is designed as a consumable or replaceable component that can be discarded after wear or damage, while the expensive tool body is recovered and reused. This eliminates the need to remanufacture the entire tool, significantly reducing manufacturing time and cost for subsequent tools.
3Productivity
If high cutting speed is used, then productivity is improved, but spindle bearing load increases
Solution Approach 1:
The patent employs counterbalancing mechanisms or distributes the cutting forces more evenly across the tool structure and spindle system. This may include symmetric arrangement of cutting edges, balancing weights, or structural design that counteracts the centrifugal and cutting forces, reducing the net load on spindle bearings while maintaining high cutting speeds.
4Device complexity
If profile cutting edge solution is used, then tool simplicity is improved, but cutting geometry flexibility is reduced
Solution Approach 1:
The cutting head is segmented into multiple interchangeable inserts or replaceable cutting elements, each with different profile geometries. This allows the basic tool structure to remain simple while providing flexibility by swapping cutting elements with different geometries for different machining operations.
Solution Approach 2:
The cutting geometry is made dynamically adjustable through replaceable inserts with varying profiles, angles, and configurations. This allows the cutting geometry to be adapted to different materials and operations without changing the fundamental tool structure, combining simplicity with versatility.
Data Source
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AI summary
The invention relates to a tool (11), in particular a milling cutter, for the rotary machining of wood and materials with similar physical properties to wood, comprising a cylindrical tool body with helical cutting edges (21) and helical flutes (23) between them. The tool has a mounting shaft (13) with an interface (15) at a first end for rotationally fixed mounting on a tool spindle, and a tool body that is in two parts and comprises a first (17) and a second (19) tool body. The first tool body (17) has an axial through-bore for receiving the mounting shaft (13), and the second tool body (19) is designed as a drill bit and is rotationally fixed to and interchangeable with the first tool body. Preferably, the mounting shaft (13) is made of stainless steel, the first tool body (17) of aluminum or a fiber-reinforced plastic, and the drill bit (19) of stainless steel or aluminum.The tool (11) according to the invention is a universal lightweight milling tool that can perform all common milling operations with high machining quality and productivity. It is preferably used as a milling cutter for slot and pocket milling as well as rebate and joining, and can also be used as a drilling cutter, in particular for producing bores with a helical traverse motion or for plunging into a ramp for milling closed grooves and pocket-shaped recesses.