Plastic Rotary Cutting Tool With Integrated Blade Retention
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Solution Overview
Problem
Tools for rotating and machining workpieces, especially those made of wood or plastic, are typically expensive to produce due to the need for high-precision stainless steel construction, and existing tools with releasable cutting edges pose safety risks due to the potential for detachment during operation.
Innovation Solution
A tool with a plastic body and integrated cutting edges, secured by a fiber composite material securing band that surrounds the tool body, providing a positive connection and preventing cutting edge detachment, thus ensuring safety and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If tools are made of metal with high-precision construction, then manufacturing precision and reliability are improved, but manufacturing cost increases
Solution Approach 1:
The tool body is made from a composite material consisting of a plastic matrix reinforced with fiber reinforcement elements. The fibers are arranged in a predetermined pattern to provide structural strength and stiffness, while the plastic matrix binds the fibers together. This composite construction achieves the required mechanical properties and precision without using expensive metal materials, thereby reducing manufacturing cost while maintaining tool precision.
2Ease of repair
If cutting edges are made releasable for replacement, then ease of repair is improved, but safety and reliability deteriorate due to potential detachment
Solution Approach 1:
The locking elements are pre-integrated into the tool body structure during manufacturing. These locking elements are positioned and configured in advance to automatically secure the cutting edges when they are inserted into the tool body. The preliminary arrangement of locking mechanisms ensures that cutting edges are reliably retained without requiring complex assembly procedures or compromising safety, while still allowing for future replacement if needed.
3Reliability
If locking mechanisms are made complex to prevent detachment, then reliability is improved, but device complexity increases
Solution Approach 1:
The locking elements are merged with the tool body structure, forming an integrated design where the locking function is built into the tool body itself rather than being a separate complex mechanism. The locking elements and cutting edges are designed to work together as a unified system, where the cutting edges fit into recesses in the tool body and are secured by the integrated locking elements. This merging approach ensures reliable cutting edge retention while minimizing device complexity.
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
The tool is produced inexpensively, ensures safe operation by preventing cutting edge loss, and allows continuous use without abrupt interruption, with the fiber composite material effectively absorbing tensile forces and distributing weight evenly.
Implementation Method 1
The strap, used as a securing element, consists of a fiber-reinforced composite material with a fiber content of at least 10%. The advantage of using a fiber-reinforced composite material for the securing element is that these materials can withstand very high tensile forces with minimal weight.
Implementation Method 2
The fiber-reinforced composite material has unidirectional fibers oriented circumferentially to the tool. The unidirectional fibers in the circumferential direction of the tool are ideally suited to absorbing the tensile forces acting in this direction.
Data Source
Figure 1
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AI summary
Illustrated and described is a tool (11) for the rotary and cutting machining of workpieces, having a plurality of blades (31) that are arranged on the tool body (17) and are arranged in blade arrangements (19), and having a securing element (21) that secures the blade arrangements (19) to the tool body (17) such that the blades cannot detach from the tool body (17) during operation. According to the invention, the tool body (17) is produced from plastic, the blades (31) are incorporated into the tool body (17) and the securing element (21) is realized as a securing strip that is incorporated into the tool body (17) and partially encloses the blade arrangements (19).