Research on Clamping Action Control Technology for Floating Fixtures

Area of Science:

• Mechanical Engineering
• Materials Science
• Manufacturing Processes

Background:

• Floating clamping enhances aircraft structural part machining quality by adaptively releasing deformation.
• Precise control of floating fixture clamping action is crucial for optimal results.
• Existing methods lack precise control over deformation release during machining.

Purpose of the Study:

• To investigate the relationship between strain energy evolution and deformation during aircraft beam machining.
• To develop a novel control method for floating fixtures based on strain energy evolution.
• To reduce the final workpiece deformation in aircraft beam manufacturing.

Main Methods:

• Utilized the finite element method (FEM) to analyze strain energy evolution during the machining process.
• Studied the machining of aircraft beams, focusing on deformation and strain energy changes.
• Developed a clamping action control method based on strain energy evolution gradient regulation.

Main Results:

• Deformation increment and strain energy variation in adjacent material layers exhibit a correlated trend.
• Targeted clamping loosening during excessive strain energy evolution gradients effectively reduces final workpiece deformation.
• The proposed control strategy reduced maximum aircraft beam deformation to 0.112 mm, a 74.6% improvement over traditional clamping.

Conclusions:

• Strain energy evolution gradient regulation provides a precise method for controlling floating fixture clamping.
• The developed control strategy significantly enhances machining quality and reduces deformation in aircraft structural parts.
• This approach offers a viable solution for improving the precision manufacturing of complex aerospace components.