This article mainly introduces:

Switzerland hydraulic cylinder,steel mill cylinder manufacturer,steel mill cylinder

(Switzerland steel mill cylinder,produced by Hengyu Hydraulic Co., Ltd）

steel mill cylinder are widely used in Switzerland，because of powerful torque，excellent temperature resistance，no transmission clearance.So our company has designed steel mill cylinder for customers from Switzerland.

Introduction to steel mill cylinder:

The steel mill cylinder should be used as far as possible to avoid the transverse force, sometimes the piston rod to bear the transverse load is too large, especially do not force or pull the steel mill cylinder, bite. Elimination method: When installing the steel mill cylinder, ensure that the axis position of the steel mill cylinder is consistent with the direction of movement; Make the load borne by the steel mill cylinder as far as possible through the steel mill cylinder axis, to avoid the phenomenon of eccentricity.

The advantages and disadvantages of the steel mill cylinder: the surface of the steel mill cylinder by painting, coating protection treatment, bright luster is not easy to rust, all raw materials of the steel mill cylinder through the top heat treatment, high manufacturing precision, belongs to the precision machinery, has a simple structure, stable quality, high mechanical efficiency, easy to achieve automation and many other advantages. However, hydraulic technology also has the shortcomings of oil leakage, oil temperature change affecting the control of running speed, noise, expensive cost and high maintenance cost.

When installing the steel mill cylinder, the axial ends of the steel mill cylinder cannot be fixed. Due to the effect of liquid pressure and thermal expansion in the steel mill cylinder, there is axial expansion. If the two ends of the steel mill cylinder are fixed, all parts of the steel mill cylinder will be deformed. When disassembling the steel mill cylinder, it is strictly forbidden to hammer the steel mill cylinder and the piston surface, such as the steel mill cylinder hole and the piston surface is damaged, do not allow sandpaper grinding, to use a fine oil stone carefully grinding. The clearance between the guide sleeve and the piston rod should meet the requirements.

If the steel mill cylinder operation failure, you can start from these aspects to troubleshoot: (1) the hydraulic system control pressure is too low. The throttling resistance in the control line may be too large, the flow valve is improperly adjusted, the control pressure is inappropriate, and the pressure source is disturbed. At this time, the control pressure source should be checked to ensure that the pressure is adjusted to the specified value of the system; (2) Air enters the hydraulic system. Mainly because there is a leak in the system. At this time, check the liquid level of the hydraulic tank, the seals and fittings on the oil suction side of the hydraulic pump, and whether the oil suction filter is too dirty. If so, the hydraulic oil should be replenished, seals and fittings should be treated, and the coarse filter element should be cleaned or replaced. (3) The initial action of the steel mill cylinder is slow. In the case of low temperature, the hydraulic oil viscosity is large, poor flow, resulting in slow steel mill cylinder action. The improvement method is to replace the hydraulic oil with better viscosity and temperature performance If the steel mill cylinder is weak and cannot push the load, please check the internal leakage problem. The internal leakage of the steel mill cylinder includes the leakage caused by excessive wear of the steel mill cylinder block seal, the piston rod and the seal cover seal and the piston seal. The cause of sealing leakage between the piston rod and the seal cover is that the seal is wrinkled, squeezed, torn, worn, aging, deterioration, deformation, etc., and a new seal should be replaced at this time. The main cause of excessive piston seal wear is improper adjustment of the speed control valve, resulting in excessive back pressure and improper seal installation or hydraulic oil contamination. The second is that foreign bodies enter the assembly and the quality of sealing materials is not good. The result is that the action is slow and weak, and in serious cases, it will cause damage to the piston and steel mill cylinder, and the phenomenon of "pulling the steel mill cylinder" appears. The treatment method is to adjust the speed control valve, and the necessary operations should be done according to the installation instructions.

Answers to some questions about steel mill cylinder:

What valve is used to control cylinder expansion?
Mainly use reversing valve, but the details of the control need hydraulic control valve, hydraulic control valve can be divided into direction control valve, pressure control valve, flow control valve. The valve controls the expansion of the cylinder is the direction control valve, that is, the reversing valve. What is the meaning of two-position three-way and three-position four-way of the reversing valve? Usually according to the different working positions that can stay after the spool is moved, it can be divided into: two-position valves, three-position valves and multi-position valves. According to the number of different slide valve channels can be divided into: two-way valve, three-way valve, four-way valve, five-way valve and multi-way valve. The name of the reversing valve is called the multi-position and multi-pass reversing valve according to its working position and the number of channels.

By what means can the hydraulic system control the arbitrary stroke position of the rotary cylinder piston rod?
The following ways can be considered: 1, through the limit device, such as limit switch, position sensor, etc. 2, by feedback the pressure of the hydraulic oil in the cylinder. The load determines the pressure, the pressure in the cylinder is determined by the load, and the pressure is very small when the cylinder is unloaded. 2.1 When clamping the workpiece, the pressure of the cylinder increases, by calculating the relationship between the clamping force and the pressure of the cylinder, take a pressure value of the cylinder, set the pressure switch, and drive the valve to work when the pressure reaches the preset value, so that the oil circuit stops supplying oil. 2.2 or set the pressure value of the relief valve to overflow after a certain set pressure.