A spring coiling machine is an industrial machine that forms steel wire into helical springs. Understanding how these machines work helps buyers choose the right type, set it up correctly, and get consistent spring quality. Here is the complete process from wire to finished spring.
The 7-Step Spring Coiling Process
Wire Loading
High-carbon spring steel wire is loaded onto a spool holder beside the machine. Wire gauges range from 0.3 mm to 6+ mm depending on the spring specification.
Wire Straightening
Wire passes through straightening rollers arranged in alternating planes to remove the natural coil memory from the spool and ensure uniform coil geometry.
Wire Feeding
Hardened feed rollers grip the wire and push it forward at a controlled rate — motorized in automatic machines, manual in hand-operated ones.
Coiling at the Coiling Pin
The wire is directed against a coiling pin (arbor). The force of the wire against this fixed point bends it into a helical coil. Spring diameter is determined by the pin position and guide setup.
Pitch Control
A pitch tool (cam or wedge) pushes against the forming wire to angle each new coil a set distance from the previous one. In automatic machines, pitch is cam-driven for perfect consistency.
Spring Cutting
Once the spring reaches the set length or coil count, a hardened cutter blade shears the wire and the finished spring drops into a collection bin.
Inspection and Post-Processing
Springs are checked for free length, coil diameter, pitch uniformity, and end squareness. They may then go to a spring end grinding machine and heat treatment.
What Types of Springs Can a Coiling Machine Make?
- Compression springs — resist compressive force; used in vehicles, mattresses, valves
- Torsion springs — apply rotational torque; used in hinges, mechanisms
- Extension springs — close-wound, stretch and pull back; used in garage doors
From Sahlon Corporation: We manufacture spring coiling machines in Phagwara, Punjab with heavy steel frames and hardened tooling for continuous industrial production. Both manual and automatic models available. Contact us for specs and pricing.
Frequently Asked Questions
How does a spring coiling machine work?
A spring coiling machine feeds steel wire through a straightener and against a coiling pin that bends it into a helical shape. A pitch tool controls the coil spacing, and a cutter releases the finished spring at the set length.
What wire is used in a spring coiling machine?
High-carbon spring steel wire from 0.3mm to 6mm diameter, with the tensile strength needed to hold its coiled shape after forming.
What types of springs can a coiling machine make?
Compression springs, torsion springs, and extension springs — depending on the machine setup and pitch configuration.