Descriptions:
1. The whole machine is in sheet plate welded structure, with internal stress eliminated by vibration aging technology, high strengh and good rigidity of machine;
2. Double hydraulic oil cylinder is applied for upper transmission, provided with mechnical limit stopper and synchronous torsion bar, typical of stable and reliable operation, as well as high precision;
3. Electrical control and manual fine-tuning mode are adopted for distance of rear stopper and stroke of gliding block, and fitted with digital display device, easy and quick in use;
4. Upper die is fitted with deflection compensation device.