Main features of our machine tools: 1.the whole machine is in sheet plate welded structure ,with internal stress eliminated by vibration aging technology,high strengh and good rigidity 2 double hydraulic oil cylinder is applied for upper transmission ,provided with mechanical limit stopper and synchronous torsion bar, with high precision and easy to operation. 3 electrical control and manual fine-tuning mode are adopted for distance of rear stopper and stroke of glinding block,and fitted with digital display device, easy and quick in use 4 On top of upper die is equipped with deflection compensation device.