Product description:
Pyramid structual mandrel shaft, material : forged 30CrNiMo8, treatment: quenching and tempering;
bronze overlay: S218 bronze;
Pyramid mandrel shaft usually has four ramps, such structure assembly mandrel shaft will be used for steel strip rolling mill tension reel. The tension of such mandrel could be large, maximum tension we could meet is 50tons. Such mandrel is one of our featured products.
Application:
All expanding and collapsed mandrels we manufactured will be used for steel and other non-ferrous cold rolling mill and hot rolling mill and coil processing lines, such as pickling line, galvanizing line, color coating line, annealing line, cut to length line, slitting line, rewinding line, tension leveling line,etc.
Pyramid mandrel shaft, material : forged 30CrNiMo8, treatment: quenching and tempering;
bronze overlay: S218 bronze;
S218 High manganese aluminum bronze
Meet:GB/T9460 SCu6338 AWS A 5.7 ERCuMnNiAl
Description: S218 is an aluminum bronze welding wire containing high manganese, which has high mechanical properties and wear resistance, and excellent corrosion resistance.
Chemical composition:
| Al | Mn | Ni | Fe | Cu | |
| standard | 7.0-8.5 | 11.0-14.0 | 1.5-3.0 | 2.0-4.0 | Rem. |
| sample | 7.58 | 11.56 | 2.55 | 2.35 | 75.96 |
Physical properties:
| Specific gravityKg/dm2 | solidus line℃ | liquidus line℃ | |
| sample | 7.4 | 945 | 985 |
Mechanical properties:
| yield strength Mpa | Tensile strength Mpa | elongation % | hardness HB | |
| sample | 800-900 | 10 | 180-240 |
Pyramid mandrel shaft usually has four ramps, we normally use such structure assembly mandrel shaft for steel strip rolling mill tension reel. Moreover, such mandrel can achieve high tension levels, and we could meet a maximum tension capccity of 50tons. Such mandrel is one of our featured products.
The mandrel has its own independent hydraulic gripper, after passing through the hydraulic system, the expanded and collapsed of the mandrel and the clamping and opening of the gripper are realized.
This structure of the mandrel has good strength, rigidity, good precision, high tension, high speed and heavy bearing capacity, etc. It is widely used in the production line of steel strip mill tension reel.
The main components of the mandrel are: pyramid shaft, segments, hollow shaft, gripper ,gripper segment, gripper hydraulic cylinder, expansion and contraction cylinder, rotary joint, outboard bearings support.
Next, the core process flow is as follows: raw material forging - rough processing - ultrasonic - quenching and tempering - semi-finishing - aging - finishing - nitriding treatment, etc. Particularly,the segment plate and the pyramid shaft under go nitriding treatment, through the nitriding hardness difference increases the wear resistance of the mandrel.
Additionally, as an OEM manufacture, our technical team could design and manufacture mandrels according to your specific application. Even you don’t have drawings, just tell us related parameters, we will meet and exceed your expectations.
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