Square slit torsion springs are widely used in various types of fighters and helicopters to trim steering gears

and their mechanical properties are significantly affected by manufacturing accuracy. Combination of low-speed rotation and linear feed to perform wire electrochemical machining square slotted torsional spring was proposed

analyzing its combined kinematics

designing a special motion device

and establishing a test system for wire electrochemical machining square slotted torsional spring. The experimental research on the electrochemical machining of the wire hole tube electrode to explore the influence of the feed speed and processing voltage parameters on the hole diameter and hole type was studied

and selecting the processing parameter with a feed speed of 0.6mm/min and a processing voltage of 14V

an array of machining holes with a hole diameter of 0.96mm is provided. The process of applying an insulating coating is used to avoid the corrosion of the non-machined surface of the torsion spring during the wire electrochemical machining process. The influence of the processing voltage on the feed speed is explored. Using optimized process parameters and improved process flow

a square slit torsion spring sample with an average slit width of 1.006mm

a size deviation of ±0.05mm

and a good surface quality was processed.