Datong Hydraulic

The required  hydraulic cylinder barrel/honed tube  is the very important part of  hydraulic cylinder , and sometimes the direct acting component of hydraulic cylinder  (when piston rod or plunger is fixed); the barrel, end cover and piston (plunger) form a sealed chamber for containing pressure oil and driving the load for acting; thus the barrel has requirements for strength, rigidity and sealing as below:    (1) The cylinder barrel should have sufficient strength to prevent permanent deformation under long-term rated operating pressure and short-term dynamic test pressure.    (2) The barrel should have sufficient rigidity to prevent bending caused by lateral force imposed by the piston and reacting force during installation.    (3) Reliable seal: The grade of dimensional tolerance and accuracy of geometric tolerance of cylinder inner surface, piston seal and supporting ring should be designed rationally to ensure reliable seal and reduce wear.    (4) The honed cylinder barrel to be

Heat treatment of  seamless steel tubes  is a process to improve the properties of metal materials and their products. Depending on the use, the material and its workpiece are heated to the appropriate temperature, insulated, and then cooled in different ways to alter the internal structure to achieve the desired performance. Heat treatment of seamless steel tubes is generally divided into annealing, normalizing, quenching, tempering, failure, chemical heat treatment and vacuum heat treatment. By heat treatment, the efficiency or life of the steel can be improved, and in some cases, more expensive special materials can be used instead of cheaper ordinary metal materials. The basic heat treatment methods of seamless steel tubes mainly include the following four forms: 1. Annealing Annealing is a process in which a seamless steel tube is heated to a slightly higher or lower critical temperature for a period of time (ie, heat preservation) and then slowly cooled. Common annealing processe

The production procedure of the  cylinder chrome rod : Datong Hydraulic   will check the material of cylinder chrome rod; then do a precision grinding process, and the surface undergoes a hard chrome surface treatment. The surface precision accuracy reaches to f8. Our chemical solution adopts HEEF 25RS from the United States, which assure our cylinder chrome rod a perfect chrome layer. Material of hard chrome plated bar: The hard chrome rod material includes JIS S45C, SAE1045, DIN CK45, JIS G4105, SCM440, SAE4140, and DIN 42CrMo4. Also, we provide stainless cylinder chrome rod, such as SUS304, SUS316 and SUS410. Other material of cylinder chrome rod can be supplied upon request. Treatment of cylinder chrome rod: treatment of induction hardened, quenched and tempered can be supplied upon request. Application of hydraulic cylinder chrome rod: The cylinder chrome rod is used for the hydraulic cylinder, such as the hydraulic mechanism adopted on the heavy machinery, construction equipment,

Honed tubes and SRB tubes (skived and roller burnished tubes) are mostly application for hydraulic cylinder and pneumatic cylinder manufacturing, it’s the most important materials of hydraulic cylinder manufacturing.  Honed tube and SRB tube has very accuracy dimension tolerance and good surface smoothness, so this product is also used in applications where precision dimension or high smooth surface is need.   As one of the leading hydraulic cylinder honed tubes suppliers, our honed pipes using our factory’s Annealing Cold Drawn Seamless Tubes (CDS tubes). In order to produce extremely precise ID dimensions and smoothly ID surface, the honing process usually more times than others.  Honed tube for hydraulic cylinder is ready to use for producing or repairing hydraulic cylinders without any further inner surface processing.   PRODUCT STANDARD: ASTM A513, DIN 2391, DIN 1630, DIN 1629, EN 10216-2, A 519, etc on customer’s request. SIZE RANGE: I.D 30 mm to I.D 500 mm (1.5″ – 20″), Wall thi

1. After the  4140 hard chrome plated bar  piston is processed, the water pressure experiment should be stopped, and the water pressure is generally L 5 times the maximum working pressure. 2. When the chromium-plated rod piston shows cracks, it should generally be scrapped; the cylindrical surface of the piston is worn due to the friction of the piston ring, which is usually not repaired; when the diameter of the cylinder bore is increased, it needs to be selected according to the increased diameter New bracket; repair only when the chrome-plated rod piston is worn or the chrome-plated rod piston ring groove and cylindrical piston pin hole are worn. 3. When the chrome-plated rod piston is scratched or scratched, you can first use a file to file the abrasion and nodules carefully, and then use a whetstone to quietly polish and lubricate.

The production procedure of the  cylinder chrome rod : Datong Hydraulic   will check the material of cylinder chrome rod; then do a precision grinding process, and the surface undergoes a hard chrome surface treatment. The surface precision accuracy reaches to f8. Our chemical solution adopts HEEF 25RS from the United States, which assure our cylinder chrome rod a perfect chrome layer. Material of hard chrome plated bar: The hard chrome rod material includes JIS S45C, SAE1045, DIN CK45, JIS G4105, SCM440, SAE4140, and DIN 42CrMo4. Also, we provide stainless cylinder chrome rod, such as SUS304, SUS316 and SUS410. Other material of cylinder chrome rod can be supplied upon request. Treatment of cylinder chrome rod: treatment of induction hardened, quenched and tempered can be supplied upon request. Application of hydraulic cylinder chrome rod: The cylinder chrome rod is used for the hydraulic cylinder, such as the hydraulic mechanism adopted on the heavy machinery, construction equipment,

DESIGN The  hydraulic cylinders  first designed by a team of hydraulic cylinder engineers, taking into account the use of the hydraulic cylinder and the environment that it will be in. This dictates materials, coatings, seals and other specialist parts. Hydraulic systems are designed in compliance with any external legislation that relates to the industry that it is being designed for. The offshore industry in particular has a number of requirements, which Apex Hydraulics can design in compliance with.   MACHINE SHOP Once the design has been finished, the machine shop engineers start producing the cylinder. Cylinder rods and other parts are bored to minutely accurate measurements using highly specialized machinery. Cylinder rods are chromed or coated with specialist coatings company such as  Datong Group .   FITTING DEPARTMENT The fitting department puts all the components together (rod, pistons, tubes and seals). Purchasing from a wide variety of high-quality manufacturers, Datong Hyd