Datong Hydraulic

  Honed   or Skiving and burnishing  are the two common for   cylinder barrel   production.   Datong Hydraulic   as a professional manufacturer, we only use   cold drawn seamless tube   to manufacture cylinder tubes For a hydraulic cylinder to operate effectively, the cylinder’s ID must be precisely round and have a mirror-like surface finish to ensure a tight seal between it and the mating internal piston. This is commonly achieved through skiving and subsequent  roller burnishing  inside a tubular workpiece. Skiving uses a set of carbide blades positioned around the diameter of a tool to slice away chips and create a geometrically round bore. Roller burnishing, a cold-working process, uses multiple rollers to compress the peaks of material left behind after skiving to generate an extremely smooth surface finish. Burnishing also introduces a residual stress layer into the cylinder wall, which improves cylinder fatigue life. The tub...

 Stress released is a technique method usually for cold drawn seamless tube and honed cylinder barrel production process. With focus on the Hydraulic Cylinder Industry the following components are made by a Cold Drawing process: Cylinder Tube Cylinder Piston Rods When a 75,000 PSI minimum yield strength is specified for the design of parts in hydraulic and pneumatic cylinder there are several options for the material that will meet this regular specification. a) Cold Drawn Cylinder Tubes – both welded or seamless Grades : E355 , AISI-1020 or AISI-1026 b) Cold Drawn Round Bars used for producing Piston Rods Grades : 1045 to ASTM-A311 or 38MnVS6 For both products is strongly recommend after the Cold Drawing a further annealing process by stress relieving.  The temperature and the time of permanence in the furnace depends on the steel grade of the product and also the cooling temperature and the time is extremely important to achieve the expected result. Cold Dra...

  E355 seamless honed tube   is a kind of high-precision steel pipe material processed by   cold drawing   or hot rolling. Due to the advantages of no oxide layer on the inner and outer walls of the precision steel tube, no leakage under high pressure, high precision, high finish, no deformation in cold bending, no flaring, no cracks in flattening, etc. E355 honed tubes mainly used for pneumatic or hydraulic components, such as  cylinder barrels , can be seamless pipe. The chemical composition of the quilted grinding tube is carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, and chromium Cr. PROCESSING TECHNOLOGY OF E355 SEAMLESS HONED TUBES E355 honed tube is processed by rolling, because the surface layer has residual compressive stress on the surface, which helps to close the tiny cracks on the surface and hinders the expansion of erosion. Therefore, the corrosion resistance of the surface can be improved, and the generation or expansion of fatigue c...

  Hydraulic cylinder  is basically composed of  cylinder barrel  and cylinder head, piston and  piston rod , sealing device and so on, if we want to strengthen its performance how to do it? 1. Using NUMERICAL control electro-hydraulic servo valve to control hydraulic cylinder can realize linear and real-time control of output, so as to improve the performance of hydraulic cylinder; 2, the cylinder has strength, can withstand dynamic working pressure, long time working without deformation; 3, stiffness, under the piston side force and installation reaction force will not bend; 4, less friction between the inner surface and guide parts and seals, can be used for a long time; 5, cylinder and flange to good welding, no cracks. 6, to correctly install the sealing device around the  hydraulic cylinder : pay attention to the installation direction when installing the sealing ring, to avoid oil leakage due to the installation, the lip should deal with the pressure ...