Description:
Follow-up control fully hydraulic open die forging hammer is a kind of electric-hydraulic hammer operated by follow-up valve and drove by fully hydraulic driving system. The lower chamber of its cylinder is connected to high pressure oil always, and follow-up valve controls the upper chamber oil in and out to realize striking and return. When upper chamber connecting to high pressure oil, it will drive cylinder to get pressure difference and with ram gravity to realize quick striking; when oil discharging from upper chamber, oil will act on circle area of lower chamber and conquer ram gravity and relevant friction force to realize return.

 Advantages:
Its principle decides its advantages, as bellow:
1) Avoid oil and gas mixing, and air leakage;
2) When return, there is no back pressure in upper chamber, so return is fast and with high striking frequency;
3) Upper and lower between piston, there are both hydraulic oil, so the sealing working environment is improved a lot and extend its life;
4) Lower chamber is connecting to high pressure always, so the ram can return at once after striking and short die contacting time;
5) Hydraulic system pressure is stable, so it is easy to realize striking energy precise control.

Such hammer is a kind hammer that can instead of hydra-pneumatic hammer with its advantages, such as simple structure and lower malfunction.