Clamping Device with Offset Tool Passages for Turbine Blade Machining
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Solution Overview
Problem
Conventional clamping systems for turbine blade blanks are inadequate as they often lead to deformations, positional deviations, and damage during machining, requiring multiple reclamping, which results in high production waste and limited accessibility for machining all four edge regions simultaneously.
Innovation Solution
The clamping device features offset machining tool passage recesses in its clamping jaw receiving devices, allowing for complete machining of all four edge regions without re-clamping, with adaptable clamping jaws and pressure elements that reduce forces and prevent damage, enabling 5-axis machining and easy access for tools and measurement systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional clamping systems are used to clamp turbine blade blanks, then the blank can be held securely during machining, but the blank requires multiple reclamping operations to machine all four edge regions, leading to deformations, positional deviations, and damage
Solution Approach 1:
The clamping device is divided into two separate clamping jaw receiving devices (first and second), each capable of independent positioning and clamping. This segmentation allows the blank to be clamped securely while providing multiple access paths for machining tools to reach all four edge regions without requiring reclamping operations, thus maintaining positioning stability throughout the entire machining process
Solution Approach 2:
The invention introduces offset machining tool passage recesses in the clamping jaw receiving devices, creating additional dimensional access paths through the clamping structure. This allows machining tools to approach the blank from multiple directions (through the recesses) while the blank remains clamped in the same position, eliminating the need for reclamping and preventing positional deviations
2Force
If clamping jaws are positioned to securely hold the blank, then machining forces can be dissipated effectively, but accessibility to all four edge regions is limited requiring tool repositioning and reclamping
Solution Approach 1:
The clamping system is segmented into two independent clamping jaw receiving devices with offset machining tool passage recesses. This segmentation allows machining tools to access different edge regions through different recesses without compromising the clamping force applied by the jaws, maintaining both secure holding and tool accessibility simultaneously
Solution Approach 2:
The offset machining tool passage recesses act as intermediaries that allow machining tools to reach the blank's edge regions without interfering with the clamping jaws' positioning and force application. These recesses provide clear paths for tools while the jaws maintain secure clamping, resolving the conflict between force application and accessibility
3Manufacturing precision
If the blank is clamped securely to prevent displacement, then machining accuracy is maintained, but the profile blade area may suffer damage from clamping pressure
Solution Approach 1:
The clamping function is segmented and distributed across two clamping jaw receiving devices with offset recesses. This allows the blank to be clamped at multiple distributed points rather than concentrated areas, reducing localized clamping pressure that could damage the profile blade area while maintaining overall positioning accuracy for precise machining
Solution Approach 2:
The offset machining tool passage recesses serve as intermediaries that allow machining operations to be performed on the profile blade area without direct interference from clamping jaws. The recesses provide clear access paths for tools while the jaws apply clamping force at offset locations, preventing damage to the profile blade area while maintaining machining accuracy
Data Source
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AI summary
The invention relates to a clamping device (1) for clamping a turbine blade blank (2) in a processing machine comprising a basic clamping unit (3), on which a first and a second clamping jaw receiving device (4, 5) are mounted, wherein a first clamping jaw (6) is mounted on the first clamping jaw receiving device (4) and a second clamping jaw (7) is mounted on the second clamping jaw receiving device (5), and wherein the turbine blade blank (2) can be fixed in a clamping manner between the clamping jaws (6, 7), wherein the first clamping jaw receiving device (4) has at least one first processing tool lead-through clearance (8) and the second clamping jaw receiving device (5) has at least one second processing tool lead-through clearance (9), and so a processing tool (10) can be led through the first processing tool lead-through clearance (8) for processing a first lower edge radius region (11) of the turbine blade blank (2) lying between the clamping jaw receiving devices (4, 5) and can be led through the second processing tool lead-through clearance (9) for processing a second lower edge radius region (12) of the turbine blade blank (2) lying between the clamping jaw receiving devices (4, 5).