Insert Blade Coolant Path Geometry for Low Pressure Loss
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Solution Overview
Problem
Existing blade designs with straight coolant supply paths face challenges in efficiently delivering coolant to machining areas due to pressure loss and diffusion issues, leading to ineffective cooling and lubrication of cutting inserts during long protrusion machining.
Innovation Solution
A blade design featuring curved coolant supply paths with gradually decreasing cross-sectional areas, bifurcation chambers, and elliptical or long hole-shaped sections to reduce pressure loss and enhance coolant flow efficiency, along with fillet portions to minimize entrance losses, ensuring effective coolant delivery to machining areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If straight coolant supply paths are used, then manufacturing is simple, but pressure loss increases and coolant delivery efficiency deteriorates
Solution Approach 1:
The patent applies curvature to the coolant supply paths by forming them as arc-shaped channels within the blade body, extending from the root toward the tip in a curved trajectory rather than straight lines. This curved configuration reduces flow resistance and pressure loss while maintaining manufacturing feasibility through standard blade molding processes.
2Ease of manufacture
If straight coolant supply paths are used, then manufacturing is simple, but coolant delivery efficiency deteriorates
Solution Approach 1:
The curved arc-shaped coolant supply paths improve coolant delivery efficiency by following the natural flow direction and reducing turbulence, while still being manufacturable through conventional blade production methods.
Solution Approach 2:
The patent varies the cross-sectional area of coolant supply paths along their length, with larger areas near the root for supply and smaller areas near the tip for discharge, optimizing flow distribution to different blade regions based on their specific cooling requirements.
3Ease of manufacture
If coolant supply paths have uniform cross-sectional area, then manufacturing is simple, but flow speed and cooling efficiency deteriorate
Solution Approach 1:
The coolant supply paths feature non-uniform cross-sectional areas that vary along their length, with larger sections near the root where coolant is supplied and progressively smaller sections toward the tip where coolant is discharged. This gradient design increases coolant flow velocity in the discharge regions, enhancing cooling efficiency while remaining manufacturable through controlled molding processes.
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 blade design efficiently supplies coolant with reduced pressure loss and increased flow speed, effectively cooling and lubricating machining areas, thereby reducing abrasion and extending the lifespan of cutting inserts.
Implementation Method 1
Since the coolant supply paths through which the coolant is guided to the discharge ports each have a curved shape, a pressure loss of the flowing coolant can be reduced as compared to a case of coolant supply paths that are straight flow paths bifurcated from the supply inlet
Implementation Method 2
the cross-sectional area of each coolant supply path gradually decreases from the supply inlet toward the corresponding discharge port. Thus, the flow speed of the coolant flowing through the coolant supply path can be increased from the supply inlet toward the discharge port
Implementation Method 3
coolant supplied through the supply inlet can be discharged through the plurality of coolant supply paths from the plurality of discharge ports opened at the end face nearby the insert attachment portion. Accordingly, a machining place of an object fabricated by the cutting insert attached to the insert attachment portion can be cooled and lubricated with the coolant
Implementation Method 4
the coolant discharged from the discharge ports 2 and 3 is diffused as mist, which makes it difficult to efficiently supply the coolant to a place where machining is provided by a cutting blade 8
Data Source
AI summary
A blade in which coolant can be efficiently supplied to a machining place with a reduced pressure loss is provided. In a blade 100 in which a cutting insert 13 is attached to an insert attachment portion 12 provided at a longitudinal end part of a blade body 11 formed in a long plate shape, the blade body 11 includes a supply inlet 51 opened at one side surface, a lower discharge port 53 and an upper discharge port 54 that are opened at an end face nearby the insert attachment portion 12, a lower coolant supply path 55 connecting the supply inlet 51 to the lower discharge port 53, and an upper coolant supply path 56 connecting the supply inlet 51 to the upper discharge port 54, and the lower coolant supply path 55 and the upper coolant supply path 56 each have a curved shape in a side view.