Titanium cup stamping is a cold forming process that turns titanium alloy sheet into a cup shape. It involves material selection, die accuracy, and staged deformation control.
Material preparation
Use commercially pure titanium such as TA1 and TA2, or titanium alloy sheet, usually 0.4 to 1.2 mm thick. The sheet surface must be free of oxide scale, cracks, scratches, and other defects. Its chemical composition and mechanical properties must meet GB/T 3621.
Die design and manufacturing
The die is made from high-strength die steel such as Cr12MoV, with heat treatment hardness of HRC 58 to 62. The unilateral clearance between punch and die is set at 7% to 10% of sheet thickness. This keeps material flow smooth and avoids wrinkling or tearing. We can build titanium cup stamping dies and related precision parts from customer drawings, for single-piece or low-volume production.
Blanking
Use precision CNC laser cutting or a blanking die to cut the sheet into a circular blank. The diameter formula is √(d² + 4dh), where d is the cup mouth diameter and h is the cup body height. Add a 2 to 3 mm trimming allowance.
Stamping forming
Use a multi-station progressive die or stepped deep drawing. The first draw deformation is controlled at 40% to 45%. Each subsequent draw is reduced by 15% to 20%. Intermediate annealing is needed between draws at 650 to 750 °C for 30 minutes. Use dedicated stamping oil to reduce friction, and keep press speed at 5 to 15 mm/s.
Heat treatment
After forming, perform stress relief annealing in a vacuum furnace at 500 to 600 °C for 1 to 2 hours. This removes work hardening and restores ductility.
Surface treatment
The steps are mechanical polishing with 600 to 2000 grit sandpaper in stages, electrolytic polishing at 15 to 20 V for 30 to 90 seconds, and anodizing to form a colored oxide film.
Quality inspection
Use a coordinate measuring machine to check dimensional tolerance of ±0.1 mm. Use fluorescent penetrant inspection to check for microcracks. Use a salt spray test to verify corrosion resistance, with no corrosion for at least 72 hours.
Special process control
In hot stamping, control die temperature at 200 to 300 °C. The draw ratio, blank diameter divided by punch diameter, should not exceed 2.0. During edge flanging, control the deformation rate to prevent cracking.
The process can reach a yield rate above 85%, with a production rate of about 25 to 40 parts per minute. It suits mass production of titanium cups with a capacity of 300 to 500 ml.
Our custom precision component machining capability is not limited to titanium cup stamping. Beyond titanium cup dies, drawing punches and dies, and fixtures, we also machine precision parts for yachts and RC cars, medical device components, and non-standard parts for food machinery and printing machinery. Hansheng Automation works from customer drawings and production quantities to deliver single-piece or low-volume precision machining.
