Cutting Tool Holder Stability via Segmented Fastening
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Solution Overview
Problem
Conventional cutting tool holding devices experience frequent damage and high maintenance costs due to inadequate engagement between the base and the cutting tool holder, resulting in a limited lifespan and increased replacement needs when working with solid and stiff materials.
Innovation Solution
The cutting tool holding device incorporates a base with a front rake wall, back rake wall, and positioning hole, along with a holder featuring a tool receiving corner post and fastening member, which includes a rabbet and position limiting groove for enhanced stability and load distribution, reducing the reaction force and preventing rotation of the holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional fastening members are used to engage the holder with the base, then the device structure is simple, but the engagement stability is insufficient and the holder rotates under reaction force
Solution Approach 1:
The fastening member is divided into multiple segments: a pressing portion for applying force, a positioning portion with positioning protrusions that fit into positioning cavities, and a connecting portion. This segmentation allows each part to perform its specific function independently, achieving stable engagement without requiring an overly complex overall structure.
Solution Approach 2:
The fastening member acts as an intermediary component between the holder and the base. It transfers the reaction force from the holder to the base through the pressing portion, while the positioning protrusions and cavities provide rotational constraint. This intermediary structure resolves the contradiction by providing both stability and simplicity.
2Strength
If the base and holder are not firmly engaged, then the device complexity is low, but serious damages occur to the cutting tool holder and base due to reaction force
Solution Approach 1:
The positioning protrusions and positioning cavities are pre-formed during manufacturing, and the fastening member is pre-designed with specific geometry. When assembled, these pre-formed features automatically align and engage, providing immediate positioning and load-bearing capability without requiring additional complex adjustment mechanisms.
Solution Approach 2:
The fastening member's pressing portion applies a controlled force to the holder, changing the contact parameters between the holder and base. This increased contact pressure enhances the load-bearing capacity and prevents damage under reaction force, while the overall structure remains relatively simple.
3Duration of action of stationary object
If conventional fastening methods are used, then the manufacturing cost is low, but the lifespan of the cutting tool holding device is limited due to frequent damage
Solution Approach 1:
The fastening member combines multiple functions into a single component: it provides pressing force through the pressing portion, rotational constraint through the positioning protrusions, and structural connection through the connecting portion. This merging reduces the need for multiple separate parts and assembly steps, maintaining ease of manufacture while significantly extending device lifespan.
Data Source
AI summary
A cutting tool holding device for holding a cutting tool is provided. The cutting tool holding device includes a base, a holder, and a fastening member. The base includes a rabbet, an angular receiving hole, and a positioning hole. The holder includes a main body and a tool receiving corner post. The main body includes an engaging portion which is detachably engaged into the rabbet. The tool receiving corner post extending projects from the main body and is correspondingly set into the angular receiving hole, wherein a position limiting groove is formed on the tool receiving corner post corresponded with the positioning hole. The fastening member is fastened in the positioning hole and pressed against the position limiting groove.