Yiming Essebi Machinery Equipment Limited

The cold heading process is carried out at room temperature and can produce high-density and high hardness bolts. The process is simple and cost-effective, making it suitable for large-scale production. However, it is prone to surface cracks and internal bubbles, requiring multiple surface treatments.
On the contrary, the hot forging process is carried out at high temperatures, which can eliminate residual stresses in the material, improve the fatigue resistance of bolts, and ensure stable material properties. But the process is complex, the manufacturing cost is high, and the heating and cooling processes may cause deformation and discoloration. Therefore, when choosing a process, factors such as product requirements and production costs need to be considered.

Cold heading is suitable for small and medium-sized bolts, such as mechanical and electronic equipment fasteners;
Hot forging is suitable for large-sized, high-strength, and high-quality bolts, such as equipment components for nuclear power, aircraft, automobiles, and ships. Overall, the cold heading and hot heading processes for titanium alloy screws have their own advantages, and the choice of process should be balanced according to actual needs.

Model Unit K-404 K-405 KD-406 KD-408
Forging station No. 4 4 4 4
Forging force Kgf 22000 32000 50000 70000
Max.cut-off dia mm 5 7 8 10
Max.cut-off length mm 45 90 100 140
Production speed pcs/min 280 260 220 220
Master die ejection stroke mm 40 70 90 130
Punch die ejection stroke mm 20 20 30 40
Main sliding table stroke mm 100 120 130 160
Overall dims. Of main die mm 35*60 50*90 50*100 60*130
Overall dims. Of punch die mm 31*85 38*85 40*100 45*115
Overall dims. Of cut of die mm 18*25 28*35 28*40 40*60
Die pitch mm 50 55 60 80
Applicable bolt dia mm 1-4 2-5 3-6 4-8
Shank length of blank mm 10-40 10-65 10-85 10-115
Max flange dia mm 9.5 16 17 19
Main engine motor KW 5.5 18.5 22 30
Machine weight Kgs 3500 6500 8000 14000
Machine dimension mm 2600*1800*1400 3500*2000*2000 3500*2000*2000 3530*2350*2090