Research on Multipass Hot Spinning Process Technology of AZ80 Magnesium Alloy Shell

Table 6

Final process parameters.

Parameters	First pass	Second pass	Third pass	Fourth pass
Spindle speed n (r/min)	60	90	60	60
Feed rate of the rotary wheel f (mm/r)	1	0.7	0.7	0.7
Thinning rate of the wall (theoretical value) φt (%)	23	26	29	25
Spinning temperature (°C)	260 ± 5	270 ± 5	290 ± 5	270 ± 5
Round corner diameter of the rotary wheel rp (mm)	10	10	10	10
Reduction of the rotary wheel C (mm)	6	6	3	3
Difference in reduction of rotary wheels Δt (mm)	2	2	1	2