Cutting Tool Concave Wall Chip Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting tools face challenges in ensuring a wide chip-discharging space, leading to chip clogging between the holder and the machined wall surface, especially when chips flow toward the outer peripheral surface, due to inadequate design of chip pockets.
Innovation Solution
The cutting tool features a concave-curved first wall surface portion and a second wall surface portion with specific inclinations and connections, creating a wider chip-discharging space and guiding path for chips, preventing clogging and improving chip-discharging properties even in regular turning tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a first sub-pocket is provided on the outer peripheral surface side of the holder, then chip storage capacity is improved, but chip-discharging space is insufficient causing chips to become clogged
Solution Approach 1:
The invention transitions from a two-dimensional chip pocket design to a three-dimensional chip discharge channel that extends along the holder axis. The chip discharge channel is formed by the mounting portion and the first wall surface portion, creating a spatial pathway that allows chips to be discharged in the axial direction, thereby resolving the contradiction between chip storage capacity and chip discharging efficiency.
Solution Approach 2:
The holder is segmented into functional zones: the mounting portion for insert installation, the first wall surface portion for chip discharge guidance, and the second wall surface portion for additional chip management. This segmentation allows each zone to perform its specific function optimally, with the chip discharge channel providing a dedicated pathway for chip removal independent of the cutting zone.
2Strength
If the lower end of the front-side edge portion of the first wall surface portion is located at a higher position, then holder rigidity is improved, but chip-discharging space is reduced causing clogging
Solution Approach 1:
The invention optimizes the positional parameter of the first wall surface portion by locating its lower end at a lower position relative to the cutting edge. This parameter change increases the chip-discharging space volume while maintaining holder rigidity through the overall structural design, including the second wall surface portion and mounting portion configuration.
Solution Approach 2:
The first wall surface portion is designed with a concave-curved surface shape that extends from the periphery of the mounting portion toward the rear end side. This curved geometry efficiently guides chips along a smooth pathway, preventing chip clogging while maximizing the chip-discharging space within the available holder volume.
3Ease of operation
If a second wall surface portion with specific inclinations is provided, then chip discharge guidance is improved, but device complexity increases
Solution Approach 1:
The second wall surface portion serves multiple functions: it provides additional chip discharge guidance, supports the holder structure, and works in conjunction with the first wall surface portion to create an integrated chip management system. The inclined regions of the second wall surface portion guide chips efficiently while maintaining structural integrity, achieving multi-functionality without proportionally increasing complexity.
Data Source
AI summary
A cutting tool is described comprising a cutting insert with an upper surface, a lower surface, a side surface, and a cutting blade formed at the intersection of the upper surface and the side surface, and a holder comprising an insert pocket to which the cutting insert is attached. The cutting insert is attached to the holder in such a manner that the cutting blade projects outward from the front end surface and the outer peripheral surface of the holder. The holder comprises in the outer peripheral surface on a rear end side with respect to the cutting blade a concave curve-shaped first wall surface portion that extends from the vicinity of the insert pocket toward the rear end side. The lower end of the front-end-side edge of the first wall surface portion is disposed at a lower position than the cutting blade.