Flow Forming & Necking Machine For Hydrogen Cylinder

Entering The Hydrogen Cylinder Production Factory

Showing our project cases for the hydrogen energy field, Altron provides Flow Forming Machines and CNC Necking Spinning machines for hydrogen cylinder factory manufacturers! These are two core metal forming processes and are essential processing links!
Below I will describe the complete production process of a hydrogen cylinder one by one:

Processing Flow of Hydrogen Cylinder

1. Raw material inspection
2. Forging
3. Sawing
4. External turning
5. Flow Forming spinning
6. Fixed length, cutting
7. Cleaning
8. Inner surface inspection (grinding)
9. Hot spinning and Necking
10. Bottle mouth lengthening
11. Transplantation marking
12. Solution treatment
13. Artificial aging
14. Performance test
15. Hardness test
16. Bottle mouth thread processing
17. High pressure cleaning
18. Laser coding
19. Bottle body grinding
20. Non-destructive particle size
21. Inner liner inspection
22. Spraying
23. Glue mixing
24. Winding
25. Curing
26. Self-tightening and water pressure test
27. Drying
28. Valve installation
29. Airtightness test
30. Finished product inspection
31. Fatigue and burst test
32. Entry, filing

How to use Flow Forming & Necking Machine to make hydrogen cylinders

Process summary of Flow Forming：

1. The limit thinning rate of 6061 aluminum alloy is 75%. If the value is exceeded, unstable production will occur: micro cracks, poor straightness, unstable internal and external dimensional accuracy;
2. If the feed speed F is too high, it is easy to cause material accumulation in front of the spinning wheel; if the feed speed F is too low, the inner diameter will be enlarged and the ovality will increase;
3. Offset spinning is to stagger the three spinning wheels to increase the spinning deformation within an appropriate range, thereby reducing the number of spinning times and improving the spinning efficiency;

Process summary of necking spinning：

1. Heating spinning will increase the wall thickness of the mouth;
2. If the temperature is too low, the plastic change of the tube material is too small;
3. If the temperature is too high, the material will melt, resulting in delamination and cracking;
4. Selection of spinning wheel: Use a wheel with a large fillet radius (spinning wheel data is not publicly described)
5. Small-diameter straight section spinning should be long, and the thickest wall thickness after forming is in the middle part;

Production Of Hydrogen Cylinders Is Testing Data：

• The surface of the hydrogen cylinder pipe must not have: scratches, impurities, cracks, etc.
• Surface finish Ra2.0;
• The straightness of the pipe after fowFlow forming is less than 0.15%;
• The deviation of the inner and outer diameters is 1% as required by the drawing;
• The temperature of the necking spinning is controlled between 350-450°
• After the necking is completed, the bottom thickness of the mouth must be greater than 20mm, and the margin is reserved for machining threads

Altron’s Hydrogen Cylinder Processing Equipment Selection

CNC Necking spinning Machine

Application Of Hydrogen Cylinders

• Vehicle High-Pressure Hydrogen Supply System And Related Products
• Water Electrolysis Hydrogen Production Equipment

Altron provides high quality machines and services to hydrogen cylinders manufacturers：

Altron’s Factory Video

please contact me and Joby engineers will give you a detailed plan.