Cutter Tooth Holder Segmented Positioning for Milling Stability
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Solution Overview
Problem
Conventional cutting tool holding devices for road milling machines experience reduced tool lifetime and increased maintenance costs due to inadequate assembly stability and reaction force management, leading to collisions between the cutting tool holder and base.
Innovation Solution
A cutting tool holding device featuring a base with a fitting positioning hole and a cutting tool holder with an engaging portion, where a fitting positioning element with a gradually changing cross-sectional area is driven by a pulling element to adjust the pressing degree, enhancing assembly stability and load-bearing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cutting tool holding devices use simple fastening members to assemble the cutting tool holder and base, then the device complexity is reduced and ease of manufacture is improved, but the assembling stability is insufficient leading to collisions and reduced lifetime
Solution Approach 1:
The fitting positioning element is divided into multiple sections with different cross-sectional areas, creating a segmented structure that provides both positioning and pressing functions. This segmentation allows the single element to achieve complex assembly stability without requiring multiple separate components, thus improving reliability while controlling complexity.
Solution Approach 2:
The fitting positioning element acts as an intermediary component between the cutting tool holder and the base. It mediates the connection by providing both positioning (through its shape-complementary design) and pressing (through the elastic pressing portion), thereby enhancing assembling stability without directly complicating the overall structure.
2Duration of action of stationary object
If the cutting tool holder and base are firmly assembled to withstand reaction forces, then the lifetime of components is prolonged, but the device complexity increases due to additional positioning and pressing mechanisms
Solution Approach 1:
The fitting positioning element merges multiple functions into a single component: positioning (through its geometric shape that complements the positioning hole), pressing (through the elastic pressing portion), and connection (by fitting between the holder and base). This merging reduces the number of separate parts needed, thereby extending component lifetime through firm assembly while minimizing the increase in device complexity.
Solution Approach 2:
The fitting positioning element is designed as a multi-functional component that simultaneously provides positioning, pressing, and connection functions. This universality allows a single element to achieve firm assembly for withstanding reaction forces and prolonging lifetime, without requiring multiple specialized components that would increase device complexity.
3Strength
If simple fastening members are used to assemble the cutting tool holder and base, then the ease of manufacture is improved, but the load value for reaction force is insufficient leading to component damage
Solution Approach 1:
The fitting positioning element utilizes parameter changes in its cross-sectional area along its length, with a larger cross-section at the pressing portion and a smaller cross-section at the positioning portion. This parameter variation allows the element to withstand high reaction forces (improving strength) while maintaining a relatively simple manufacturing process, as it is essentially a single machined component rather than an assembly of multiple parts.
Data Source
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AI summary
A cutting tool holding device (100) includes a base (110), a cutting tool holder (120), a screw element (115), a fitting positioning element (150) and a pulling element (160). The base (110) includes an accommodating groove (111 a), a receiving hole (112a) and a fitting positioning hole (113). The cutting tool holder (120) includes a holder (130) and a cutting tool receiving component (140). The holder (130) includes an engaging portion (132) detachably engaged in the accommodating groove (111 a), and a concave portion (133) communicated with the fitting positioning hole (113) is formed on the engaging portion (132). The fitting positioning element (150) is driven by the pulling element (160) to move in the fitting positioning hole (113) for pressing against the concave portion (133) tightly. The cutting tool holding device (100) has improved stability.