Cutting Insert Gap Geometry for Chip Flow and Coolant Reach
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Solution Overview
Problem
The accumulation of chips between the upper side of the cutting insert and the tool holder in machining tools can cause damage to the cutting insert, and modifying the clamping method or coolant outlet configuration to address this issue poses challenges such as static overdetermination or reduced coolant reach to the cutting edge.
Innovation Solution
A tool design featuring a cutting insert with a widening gap between its upper side and the tool holder's third wall, allowing chips to be easily pushed out without being pressed in, while maintaining close coolant delivery to the cutting edge, using a clamping element that presses the cutting insert against multiple bearing sections for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the cutting insert is clamped from the upper side to close the gap, then chip accumulation is prevented, but static overdetermination occurs and the cutting insert may be levered out during machining
Solution Approach 1:
The clamping function is segmented into two independent parts: the clamping element provides downward clamping force through three bearing points, while the fourth wall section provides lateral support from the side. This segmentation avoids static overdetermination by distributing clamping functions across multiple independent contact points, preventing the cutting insert from being levered out while still preventing chip accumulation.
Solution Approach 2:
The solution moves from a single-direction clamping approach (vertical only) to a multi-dimensional clamping system. The fourth wall section extends laterally to provide side support, adding a horizontal dimension to the clamping mechanism. This dimensional expansion allows chip prevention without compromising vertical clamping stability.
2Ease of operation
If the gap between the cutting insert and tool holder is enlarged to facilitate chip removal, then coolant delivery to the cutting edge is compromised
Solution Approach 1:
The fourth wall section protrudes laterally from the tool holder body, creating a side-opening gap rather than a vertical gap. This dimensional change allows chips to be removed laterally through the fourth wall opening while the coolant outlet on the upper surface continues to deliver coolant directly to the cutting edge without obstruction.
Solution Approach 2:
The gap for chip removal is segmented from the main tool holder body through the fourth wall section. This segmentation creates a dedicated chip ejection path that is spatially separated from the coolant delivery path, allowing both functions to operate independently without interference.
3Object-affected harmful factors
If the clamping structure is modified to prevent chip accumulation, then the complexity of the device increases
Solution Approach 1:
The fourth wall section serves multiple functions simultaneously: it provides lateral support to prevent the cutting insert from shifting during machining, it creates an opening for chip removal, and it maintains the structural integrity of the tool holder. This multi-functionality prevents chip accumulation without requiring additional separate components.
Solution Approach 2:
The fourth wall section merges the support function and chip ejection function into a single structural element. By integrating these functions into one component rather than using separate elements, the overall device complexity is minimized while still achieving the desired chip prevention.
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
Prevents chip accumulation and ensures stable clamping of the cutting insert, while maintaining effective coolant supply close to the cutting edge, preventing self-locking and allowing for efficient chip removal without compromising coolant delivery.
Implementation Method 1
An internal coolant channel is provided inside the tool holder, by means of which coolant and lubricant (hereinafter referred to simply as 'coolant') can be transported to the region of the machining point
Implementation Method 2
Cooling of the cutting insert therefore takes place very close to the active cutting edge
Implementation Method 3
The clamping screw presses the cutting insert into the base of the cutting insert receptacle, on the one hand, with a flat surface provided on its rear side. On the other hand, the clamping screw presses the cutting insert peripherally with two bearing surfaces running obliquely to one another against corresponding counter-bearing surfaces of the cutting insert receptacle.
Data Source
AI summary
A tool for machining a workpiece. The tool comprises a tool holder with an internal coolant channel and a cutting insert detachably fixed to the tool holder. A gap is provided between the top side and a superstructure of the tool holder arranged above the cutting plate, on which a coolant outlet opening of the coolant channel is arranged. To improve the chip flow out of the gap, the height of the gap is getting larger towards the front side.