Rotary Cutting Tool Elastic Pressure Insert Mounting
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Solution Overview
Problem
Prior art side milling cutters are structurally weak due to thin thickness and complex shapes for fixing elements, making them prone to damage and difficult to manufacture, and require disassembly for insert replacement in gang cutters.
Innovation Solution
A rotary cutting tool with a cutting insert mounted via an elastic pressure portion in the tool body, eliminating the need for clamping screws and allowing easy radial replacement, featuring a rotationally symmetrical cutting insert with inclined surfaces and protrusion portions for stable mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixing elements and clamping screw holes are provided in the thin tool body and cutting insert, then the cutting insert can be mounted to the tool body, but the tool body and cutting insert become structurally weak and may be damaged during cutting operation
Solution Approach 1:
The patent removes the clamping screw holes and traditional fixing elements from the cutting insert and tool body, extracting the problematic features that weakened the structure. Instead, it uses an elastic pressing element that applies force through the thickness direction without requiring holes through the thin components, thereby maintaining structural integrity while achieving secure mounting.
Solution Approach 2:
The patent introduces an elastic pressing element as an intermediary component between the tool body and cutting insert. This mediator applies clamping force through the thickness direction of the cutting insert, securing it to the tool body without requiring holes or traditional fixing elements that would compromise the structural strength of the thin components.
2Ease of operation
If fixing elements and clamping screw holes are formed in the cutting insert and tool body, then the cutting insert can be secured to the tool body, but the shape becomes complicated and manufacturing becomes difficult
Solution Approach 1:
The patent extracts the complex fixing elements and clamping screw holes from the design, simplifying the cutting insert and tool body shapes. The elastic pressing element provides the mounting function without requiring complicated hole patterns or complex interlocking features, making both components easier to manufacture.
Solution Approach 2:
Instead of using traditional horizontal or vertical clamping mechanisms that require complex hole patterns and fixing elements, the patent inverts the approach by applying pressure through the thickness direction of the cutting insert. This inversion simplifies the overall shape and manufacturing of both the cutting insert and tool body while achieving secure mounting.
3Strength
If the cutting insert is clamped by a clamping screw fastened axially through the tool body, then the cutting insert can be securely held, but replacement requires disassembly of the gang cutter
Solution Approach 1:
The patent segments the clamping mechanism from the main tool body structure, using independent elastic pressing elements that can be actuated separately for each cutting insert position. This allows individual insert replacement without disassembling the entire gang cutter, improving productivity while maintaining secure clamping force through the elastic pressing action.
Solution Approach 2:
The elastic pressing elements are designed to automatically apply clamping force when the cutting insert is installed, eliminating the need for manual screw fastening. The elastic material itself provides the clamping action, allowing operators to quickly replace inserts by simply inserting and locking them into position without complex disassembly procedures.
4Volume of moving object
If the tool body and cutting insert have thin thickness to reduce size, then the cutting tool is more compact, but they become structurally weak and prone to damage
Solution Approach 1:
The elastic pressing element acts as a mediator that distributes clamping force across the cutting insert without requiring thickening of the tool body or insert. The elastic material can exert significant force through its deformation, allowing thin components to be securely held together without compromising their compact size or structural integrity.
Solution Approach 2:
The patent utilizes elastic materials with high strength-to-weight ratios and excellent mechanical properties. These elastic pressing elements can be made from specialized polymers or elastomers that provide both the necessary flexibility for pressing action and sufficient strength to maintain secure clamping, allowing thin components to achieve both compactness and structural strength.
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 solution provides a strong, easily manufacturable cutting tool with stable insert mounting and easy replacement, preventing damage during operation and simplifying maintenance in gang cutters.
Implementation Method 1
an elastic pressure portion which presses the cutting insert
Data Source
AI summary
A rotary cutting tool for slotting and a cutting insert replaceably mounted to such a rotary cutting tool. The cutting insert is mounted to an insert pocket of a tool body of the rotary cutting tool and is pressed by an elastic pressure portion provided in the tool body. The cutting insert has an upper surface, a lower surface and four peripheral side surfaces. The top and lower surfaces have an inclined surface pressed by the elastic pressure portion. When the cutting insert is mounted to the insert pocket, the inclined surface of the upper surface is pressed by the elastic pressure portion. The inclined surface is inclined with respect to a cross section of the cutting insert such that the lower surface and two peripheral side surfaces of the cutting insert are contacted with the insert pocket by pressure of the elastic pressure portion.