Flowchart of Pigtail Manufacturing Process

Pigtail manufacturing involves forming the ends of a coil spring into a pigtail shape using automated machines with forming jigs, integrated with coiling and quenching operations. Overview of the ProcessThe pigtail manufacturing process is typically a post-coiling operation where the ends of a coil spring are shaped into a pigtail. This process improves spring performance, reduces interference with other components, and optimizes space in applications like vehicle suspensions.

Step-by-

Step Process Flow

Coil Spring ProductionThe process begins with a coiling machine that forms the raw wire into a cylindrical or pre-designed coil spring shape. Springs are then transferred to the pigtail forming station, either manually or via an automated loader.

Loading and Orientation

Each spring is loaded onto the pigtail forming machine at a specified position. An operator ensures the end of the spring is correctly oriented for accurate pigtail formation.

Pigtail Forming

The machine uses a forming jig that moves according to a pre-set program to shape the spring end into a pigtail. The jig may require adjustment or replacement depending on the pigtail design, number of turns, or spring diameter. The forming operation is automated, initiated by pressing a start button, and the jig precisely bends the spring end.

Unloading

After forming, the finished pigtail spring is unloaded from the machine, either manually or via an automated unloader. Springs are then transferred to the quenching or heat treatment stage to stabilize the shape and mechanical properties. Integration with Other ProcessesThe pigtail forming machine is often installed near the coiling machine to streamline workflow.

Optional loaders can automatically position springs from the coiler to the pigtail machine, reducing manual handling.

Quality Control

Springs are inspected for pigtail accuracy, turn count, and dimensional compliance. Adjustments to the forming jig or machine program are made if deviations are detected.

Key Equipment and Features

Forming Jig: Determines the pigtail shape and is programmable for different designs. Servo Motors and Sliding Mechanisms: Allow precise movement of the jig and spring during forming. Compact Design: Enables installation close to coiling machines for efficient workflow.

Operator Interface: For loading, orientation, and starting the automated forming cycle.

Summary

The pigtail manufacturing process is a semi-automated or fully automated operation that transforms coiled springs into pigtail-ended springs. It involves loading, orientation, jig-based forming, unloading, and integration with quenching, ensuring consistent quality and efficiency in production. This process is essential for applications requiring compact, high-performance coil springs.