Main manufacturing process of YUTONG cylinder rod.
1. Raw material preparation and workblank production.
- Commonly used materials for piston rod are CK45, 4140, 5140, SS304, SS316, etc.
- Determine the workblank margin according to the aspect ratio, the state of the workblank, etc.
- Straightening the cylinder rod
- Combined piston rod parts manufacturing.
2. Assembly and Welding.
- Assemble according to the drawing.
- Position welding, welding, and detect flaws as required, and then transfer to the next process after passing the test.
3. Heat treatment.
Cylinder piston rods are usually heat treated after rough machining and before finishing machining. Common heat treatment methods include normalizing, tempering to stress, quenching and tempering, Induction hardening etc., which are adopted according to design requirements.
Hydraulic Piston Rod induction heat treatment can make the surface of the product obtain high hardness and wear resistance, while the interior still maintains the original good plasticity and toughness. It is currently the most widely used and fastest-growing surface heat treatment method with its unique advantages.
4. Turning.
- Workpiece clamping correction.
- Turning support gear, drilling center hole, turning length.
- Rough turning outer circle.
- Semi-finished turning, refined turning outer circle.
- Threading.