The overload oil pump of precision punch equipment has five functions, such as protecting die, emergency stop in case of emergency, breaking off when clamping die, reducing connection clearance and sensing eccentric load. In order to use precision high-speed punch well, it is necessary to understand the working principle of overload oil pump

When the precision high-speed punch is used, the pressure switch on the overload oil pump is on, which makes the precision high-speed punch in operation. Indicates that there is overload protection, square tube CNC punch machine, can carry out stamping. After the pump starts, due to the effect of initial pressure, the main valve of overload oil pump moves slightly to the right.

When the oil pressure in the high-speed precision punch cylinder rises above the set pressure, the main valve overcomes the spring force to move to the right, and pushes the seal of the main valve to return the high-pressure oil to the oil tank.

Shelves can be divided into general shelves and special shelves according to their applicability.

According to the manufacturing materials, the shelves are divided into steel shelves, reinforced concrete shelves, steel and reinforced concrete mixed shelves, wooden shelves, steel and wood shelves, etc.

According to the degree of shelf closure, it can be divided into open shelf, semi closed shelf, closed shelf, etc.

According to the structural characteristics, the shelf is divided into three parts: layer shelf, layer grid shelf, cupboard shelf, drawer shelf, cantilever shelf, triangle shelf, grid shelf, etc.

According to the mobility of shelves, it can be divided into fixed shelves, mobile shelves, rotary shelves, combined shelves, adjustable shelves, mobile storage shelves, etc.

According to the shelf use shelf, convenience store shelf, etc.

According to the shelf structure, it can be divided into the whole structure, the shelf directly supports the warehouse roof and shed, and the split structure. The shelf and the building are divided into two independent systems.