Beam Clamp Fixture With Rotary Pivot Block
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Solution Overview
Problem
Large structural elements like beams, particularly those made of aluminum and carbon fiber reinforced polymers, tend to warp during machining, requiring accurate clamping to maintain a constant profile without causing distortion.
Innovation Solution
A beam clamp fixture with a clamp arm assembly that provides rotary and linear movement, using an actuator with a rotatable shaft and pivot block to apply an adjustable hold-down force against a datum surface, allowing for the straightening of warpage while preventing distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a beam is clamped against datum surfaces to eliminate warpage during machining, then the beam profile can be maintained, but the clamping force may cause distortion of the beam
Solution Approach 1:
The clamp arm assembly provides dynamic adjustment capability through rotary movement of the pivot block, allowing the clamp arm to move between engaged and disengaged positions. This dynamic mechanism enables precise control of clamping force application, allowing the system to maintain beam profile accuracy while avoiding excessive force that could cause distortion. The rotary actuator allows controlled engagement and disengagement, providing adaptability in force application.
Solution Approach 2:
The invention changes the parameter of clamping force application through the rotary actuator mechanism. By rotating the pivot block, the system can adjust the engagement level of the clamp arm, thereby controlling the magnitude of clamping force. This parameter adjustment allows the system to apply sufficient force to eliminate warpage while preventing excessive force that would cause distortion of the beam profile.
2Reliability
If a clamp arm assembly provides both rotary and linear movement to engage the beam, then the clamping effectiveness is improved, but the device complexity increases
Solution Approach 1:
The invention merges the rotary and linear movement functions into a single integrated clamp arm assembly. The pivot block rotation simultaneously achieves both rotary engagement and linear clamping motion through the mechanical linkage. This merging of functions into one unified mechanism provides reliable clamping effectiveness while minimizing the number of separate components, thereby reducing overall device complexity compared to having separate rotary and linear actuation systems.
Solution Approach 2:
The pivot block serves multiple functions: it acts as a rotary actuator for engagement, provides linear movement for clamping, and serves as a mounting structure for the clamp arm. This multi-functionality reduces the number of separate components needed, thereby reducing device complexity while maintaining high clamping effectiveness. The single pivot block mechanism achieves what would otherwise require multiple separate systems.
3Manufacturing precision
If an actuator with rotatable shaft and pivot block is used to apply adjustable hold-down force, then the beam can be straightened without distortion, but the device complexity increases
Solution Approach 1:
The actuator mechanism with rotatable shaft and pivot block provides self-adjusting capability. As the pivot block rotates, the mechanical geometry automatically adjusts the hold-down force applied by the clamp arm. This self-service adjustment eliminates the need for external force control systems, thereby achieving beam straightening accuracy while minimizing device complexity. The mechanism uses its own rotational motion to automatically regulate the clamping force.
Solution Approach 2:
The rotatable actuator shaft changes the parameter of hold-down force through mechanical geometry. As the shaft rotates, the pivot block and clamp arm assembly automatically adjust the force application parameter. This parameter change mechanism provides precise beam straightening capability while using a simple rotational input, thereby avoiding the complexity of force control systems.
Data Source
AI summary
A fixture for clamping a structural beam during machining is equipped with at least one beam clamp assembly having an elongated clamp arm capable of pivoting as well as linear motion during a clamping operation. The elongated clamp arm is pivotably mounted to a pivot block rotated by an actuator device. The pivot axis of the clamp arm is aligned with but spaced from the axis of rotation of the pivot block.