Deburring Reamer Head Using Dynamic Pressure for Lower Fluid Pressure
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Solution Overview
Problem
Existing deburring tools for cylindrical recesses require high precision and complex processing, and high fluid pressure to generate sufficient radial force for effective deburring, making the process expensive and prone to residual chip formation.
Innovation Solution
A reamer with a cutting head featuring a dynamic pressure effective surface set back radially, which generates a larger radial force with lower fluid pressure, allowing for efficient and precise deburring without complex processing, using a cutting head with multiple cutting wedges and a fluid channel system that distributes fluid effectively across a larger surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cutting tool uses a conventional puncture channel design in the cutting head area, then the tool can perform deburring, but the processing becomes complex and prone to damaging cutting edges
Solution Approach 1:
The invention extracts the puncture channel from the cutting head area and relocates it to the shank area. This separation allows the cutting head to maintain its structural integrity and cutting edge protection while the fluid channel is positioned in a safer, more accessible location on the shank, simplifying both manufacturing and reducing damage risk.
Solution Approach 2:
The fluid channel is nested within the shank structure rather than being integrated into the cutting head. The shank acts as a container for the fluid channel, allowing the channel to be housed within the tool body in a way that protects it and simplifies the overall construction while maintaining functional effectiveness.
2Force
If the tool uses a conventional fluid channel system, then fluid can be supplied to generate radial force, but a relatively high supply pressure is necessary to achieve sufficient radial deflection
Solution Approach 1:
The invention changes the spatial arrangement of the fluid channel from a radial configuration (conventional) to a longitudinal configuration along the shank axis. This dimensional change allows fluid to be supplied more efficiently along the length of the tool, improving pressure distribution and reducing the peak supply pressure needed to generate the same radial force at the cutting head.
Solution Approach 2:
The shank acts as an intermediary medium that transmits fluid pressure from the supply source to the cutting head area. By positioning the fluid channel in the shank, the system uses the shank structure as a pressure transmission conduit, which improves hydraulic efficiency and reduces the pressure loss that would occur with conventional direct routing to the cutting head.
3Manufacturing precision
If high precision positioning of the cutting head is used to remove chips, then deburring effectiveness improves, but manufacturing costs increase significantly
Solution Approach 1:
The invention enables the cutting tool to perform its own chip removal function through the fluid channel system that generates radial force during normal operation. The tool self-regulates chip evacuation without requiring external positioning systems or additional complex mechanisms, maintaining high precision while avoiding increased manufacturing costs.
Solution Approach 2:
The invention replaces complex mechanical positioning systems with a fluid-dynamic system. Instead of using mechanical means to precisely position and control the cutting head for chip removal, the system uses fluid pressure generated through the shank channel to create radial forces that achieve the same effect more simply and cost-effectively.
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 reamer effectively removes burrs and residual chips with reduced effort, ensuring reliable and error-free deburring across various bore diameters with a simpler fluid supply system, minimizing the risk of further chip formation.
Implementation Method 1
the flow medium emerging from the orifice of the at least one branch channel backs up on the opposite inner wall of the recess, as a result of which a dynamic pressure is formed between the tool and the inner wall of the recess, which radially elastically deflects the cutting head
Implementation Method 2
each having a cutting edge that extends at least in sections in the axial direction, performs a cutting operation due to a relative movement between the reamer and the workpiece
Data Source
Figure 1~3
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Figure 6~7
AI summary
The invention relates to a chip-removing tool (10) for deburring bores (1), which laterally open into a cylindrical recess (2) for example, comprising a shaft (20); a cutting head (30) with at least one cutting wedge on the circumference, said cutting wedge being paired with a flute and having a cutter (31), which extends in an axial direction at least in some sections, carries out a cutting process on the basis of a relative movement between the tool and a workpiece, and lies on a virtual cylindrical rotational surface (40) with a diameter that corresponds to the nominal diameter of the chip-removing tool, and at least one cutting wedge- and flute-free surface region (32); at least one fluid channel (21) which is closed on the cutting head side and which extends through the shaft (20) and into the cutting head (30); and at least one puncture channel (50) which starts from the fluid channel (21) and comprises an opening (51) that lies in the cutting wedge- and flute-free surface region (32). According to the invention, the chip-removing tool (10) has a dynamic pressure active surface (60, 160, 260) which is radially recessed relative to the virtual rotational surface (40) of the cutting head (30) and which is larger than a flow cross-sectional surface of the at least one puncture channel (50) at the opening (51).