Hydraulic system of actuators. Generally by the cylinder block, cylinder rod (piston rod) and the seal of internal cylinder body consists of piston is divided into two parts, a oil hole, respectively. Due to liquid compression ratio is small, so when one of the feed oil hole, the piston will be pushed to make another hatch out of oil, the piston drives the piston rod out (back) exercise, vice versa.
The working principle of the hydraulic cylinder
Say it one of the most basic first five parts:
1 - cylinder and the cylinder head
2 - the piston and piston rod
3 - seal
4 - buffer device
5 - exhaust system.
The working principle of each cylinder are almost similar, with a manual jack, jack also is actually a simple cylinder. By manual pressurization stem (hydraulic manual pump) to make the hydraulic oil through a one-way valve into the cylinder, then into the cylinder of the hydraulic oil, because of the single valve can't back, forcing cylinder rod up, and then work continue to make the hydraulic oil into the hydraulic cylinder, thus constantly on the rise, will send when they open the hydraulic valve, the hydraulic oil tank back to, this is the most simple working principle, the other is based on the improved, cylinder and cylinder in the same principle.
According to the structure of the hydraulic cylinder is commonly used, it can be divided into four types: 1 2 plunger piston type 3 retractable 4 oscillating
The advantages and disadvantages of oil cylinder and the cylinder
Advantages of 1
The pneumatic system USES generally in 0.2 1.0 Mpa pressure range, so the cylinder is cannot make the high-power power element. The hydraulic cylinder can do bigger power components, using the hydraulic system
Advantage 2
Tell from medium air can be unlimited, there is no cost and difficulty of supply, will be used directly into the atmosphere, easy to handle, not pollution, hydraulic oil, on the other hand
Advantage 3
The resistance is less than the hydraulic oil viscosity is small,
Advantages of 4
Air compression rate is greater than the hydraulic oil, so its working stability and response, was far away.
The hydraulic cylinder is the most important components of the hydraulic system, it will hydraulic pressure can convert mechanical energy, and coordinates with all sorts of driving mechanism, complete all kinds of mechanical movement. The hydraulic cylinder has simple structure, large output force, stable and reliable performance, convenient in operation and maintenance, application range, etc.
Oil cylinder processing
Cylinder is the most important parts of traditional engineering machinery processing method broaching, fine boring cylinder block, cylinder grinding cylinder body. By adopting the method of rolling broaching, fine boring cylinder block, cylinder body rolling cylinder, process is the part 3, but time contrast: grinding cylinder 1 m in about 1 to 2 days, rolling cylinder 1 m in about 10 to 30 minutes. In contrast grinding machine or quilted mill (tens of thousands, millions), rolling knife (1 $-- tens of thousands). After rolling, hole roll surface roughness by building before Ra3.2 is ~ 6.3 microns reduce Ra0.4 ~ 6.3 microns, the surface hardness of the hole increased about 30%, within the cylinder surface fatigue strength increased by 25%. The service life of the oil cylinder, if only consider cylinder 2 ~ 3 times, boring and rolling process is grinding process efficiency about three times. The above data shows that the rolling process is efficient, can greatly improve the quality of the surface of the cylinder.
Comparison of oil cylinder rolling processing characteristics of the cylinder after rolling
Surface without sharp blade, tiny movement of friction for a long time also won't damage sealing ring or seal, it is particularly important in the hydraulic industry.
Rolling processing principle
It finishing machining is a kind of pressure, is the use of metal in cold plastic deformation characteristics of normal temperature condition, using the rolling tool exert some pressure on the surface, make the surface of metal workpiece produces plastic flow, fill in to the original residual dips troughs, and achieves the workpiece surface roughness value reduced. By rolling the surface layer of metal plastic deformation, make the surface cold hardening and grain fine and dense fibrous formation, and formation of residual stress layer, hardness and strength increase, so as to improve the surface wear resistance, corrosion resistance, and coordination. Rolling is a kind of no cut plastic processing methods.
No machining technology can safe, convenient, accurate control accuracy, several major advantages:
1. To improve the surface roughness, roughness of basic can achieve Ra 0.08 microns or less.
2. Correct roundness, ovality can be 0.01 mm or less.
3. To improve the surface hardness, eliminate the stress deformation, hardness HV 4 ° or higher
4. When processed residual stress layer, and improve the fatigue strength increased by 30%.
5. Improve the quality of cooperation, reduce wear and prolong the service life of the parts and machining cost but lower instead.
Cylinder is the most important parts of engineering machinery, the traditional processing method is: broaching, fine boring cylinder block, cylinder grinding cylinder body. Using the rolling method is: broaching, fine boring cylinder block, cylinder body rolling cylinder, process is the part 3, but time contrast: grinding cylinder 1 m in about 1 to 2 days, rolling cylinder 1 m in about 10 to 30 minutes. In contrast: grinding machine or quilted mill (tens of thousands, millions), rolling knife (1 $-- tens of thousands). After rolling, hole roll surface roughness by building before Ra3.2 is ~ 6.3 microns reduce Ra0.4 ~ 6.3 microns, the surface hardness of the hole increased about 30%, within the cylinder surface fatigue strength increased by 25%. The service life of the oil cylinder, if only consider cylinder 2 ~ 3 times, boring and rolling process is grinding process efficiency about three times. The above data shows that the rolling process is efficient, can greatly improve the quality of the surface of the cylinder.
Oil cylinder after rolling, the surface without sharp blade, tiny movement of friction for a long time also won't damage sealing ring or seal, it is particularly important in the hydraulic industry.
The working principle of the hydraulic cylinder
Say it one of the most basic first five parts:
1 - cylinder and the cylinder head
2 - the piston and piston rod
3 - seal
4 - buffer device
5 - exhaust system.
The working principle of each cylinder are almost similar, with a manual jack, jack also is actually a simple cylinder. By manual pressurization stem (hydraulic manual pump) to make the hydraulic oil through a one-way valve into the cylinder, then into the cylinder of the hydraulic oil, because of the single valve can't back, forcing cylinder rod up, and then work continue to make the hydraulic oil into the hydraulic cylinder, thus constantly on the rise, will send when they open the hydraulic valve, the hydraulic oil tank back to, this is the most simple working principle, the other is based on the improved, cylinder and cylinder in the same principle.
According to the structure of the hydraulic cylinder is commonly used, it can be divided into four types: 1 2 plunger piston type 3 retractable 4 oscillating
The advantages and disadvantages of oil cylinder and the cylinder
Advantages of 1
The pneumatic system USES generally in 0.2 1.0 Mpa pressure range, so the cylinder is cannot make the high-power power element. The hydraulic cylinder can do bigger power components, using the hydraulic system
Advantage 2
Tell from medium air can be unlimited, there is no cost and difficulty of supply, will be used directly into the atmosphere, easy to handle, not pollution, hydraulic oil, on the other hand
Advantage 3
The resistance is less than the hydraulic oil viscosity is small,
Advantages of 4
Air compression rate is greater than the hydraulic oil, so its working stability and response, was far away.
The hydraulic cylinder is the most important components of the hydraulic system, it will hydraulic pressure can convert mechanical energy, and coordinates with all sorts of driving mechanism, complete all kinds of mechanical movement. The hydraulic cylinder has simple structure, large output force, stable and reliable performance, convenient in operation and maintenance, application range, etc.
Oil cylinder processing
Cylinder is the most important parts of traditional engineering machinery processing method broaching, fine boring cylinder block, cylinder grinding cylinder body. By adopting the method of rolling broaching, fine boring cylinder block, cylinder body rolling cylinder, process is the part 3, but time contrast: grinding cylinder 1 m in about 1 to 2 days, rolling cylinder 1 m in about 10 to 30 minutes. In contrast grinding machine or quilted mill (tens of thousands, millions), rolling knife (1 $-- tens of thousands). After rolling, hole roll surface roughness by building before Ra3.2 is ~ 6.3 microns reduce Ra0.4 ~ 6.3 microns, the surface hardness of the hole increased about 30%, within the cylinder surface fatigue strength increased by 25%. The service life of the oil cylinder, if only consider cylinder 2 ~ 3 times, boring and rolling process is grinding process efficiency about three times. The above data shows that the rolling process is efficient, can greatly improve the quality of the surface of the cylinder.
Comparison of oil cylinder rolling processing characteristics of the cylinder after rolling
Surface without sharp blade, tiny movement of friction for a long time also won't damage sealing ring or seal, it is particularly important in the hydraulic industry.
Rolling processing principle
It finishing machining is a kind of pressure, is the use of metal in cold plastic deformation characteristics of normal temperature condition, using the rolling tool exert some pressure on the surface, make the surface of metal workpiece produces plastic flow, fill in to the original residual dips troughs, and achieves the workpiece surface roughness value reduced. By rolling the surface layer of metal plastic deformation, make the surface cold hardening and grain fine and dense fibrous formation, and formation of residual stress layer, hardness and strength increase, so as to improve the surface wear resistance, corrosion resistance, and coordination. Rolling is a kind of no cut plastic processing methods.
No machining technology can safe, convenient, accurate control accuracy, several major advantages:
1. To improve the surface roughness, roughness of basic can achieve Ra 0.08 microns or less.
2. Correct roundness, ovality can be 0.01 mm or less.
3. To improve the surface hardness, eliminate the stress deformation, hardness HV 4 ° or higher
4. When processed residual stress layer, and improve the fatigue strength increased by 30%.
5. Improve the quality of cooperation, reduce wear and prolong the service life of the parts and machining cost but lower instead.
Cylinder is the most important parts of engineering machinery, the traditional processing method is: broaching, fine boring cylinder block, cylinder grinding cylinder body. Using the rolling method is: broaching, fine boring cylinder block, cylinder body rolling cylinder, process is the part 3, but time contrast: grinding cylinder 1 m in about 1 to 2 days, rolling cylinder 1 m in about 10 to 30 minutes. In contrast: grinding machine or quilted mill (tens of thousands, millions), rolling knife (1 $-- tens of thousands). After rolling, hole roll surface roughness by building before Ra3.2 is ~ 6.3 microns reduce Ra0.4 ~ 6.3 microns, the surface hardness of the hole increased about 30%, within the cylinder surface fatigue strength increased by 25%. The service life of the oil cylinder, if only consider cylinder 2 ~ 3 times, boring and rolling process is grinding process efficiency about three times. The above data shows that the rolling process is efficient, can greatly improve the quality of the surface of the cylinder.
Oil cylinder after rolling, the surface without sharp blade, tiny movement of friction for a long time also won't damage sealing ring or seal, it is particularly important in the hydraulic industry.