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Manufacturing Process for Bolted Spheres

2026-04-29

The material is primarily round steel, and cutting is carried out using a mechanical sawing machine.

The cylindrical sections cut from the round bar are then subjected to initial pressing with steel balls:
The round bar is heated to 1150°C–1200°C in a heating furnace, and initial forging is carried out using a high-speed steam hammer.
The forging of the spheres is carried out using a high-speed steam hammer in conjunction with specialised forming dies.
The forging temperature should be maintained between 800°C and 850°C.
No micro-cracks must form on the surface of the sphere during forging. Furthermore, the surface of the forged sphere should be uniform and smooth.

First, the reference surface for the process holes is machined on a specialised lathe, and then the process holes are drilled into that surface.

First, use a drill bit to drill the bolt holes, then switch to a tap to cut the internal threads.

Sand, remove rust and shape, then apply a coat of paint.