How to repair the cylinder of CNC bending machine

     The hydraulic cylinder of the hydraulic bending machine is mainly a hydraulic actuator that converts hydraulic energy into mechanical energy, and then performs linear or reciprocating motion. Cylinders are the main components of hydraulic cylinders, single pillars for mines, hydraulic supports, gun barrels and other products. The quality of their processing directly affects the life and reliability of the entire product. The cylinder barrel has high processing requirements, and its inner surface roughness is required to be Ra0.4～0.8&um, and the requirements for coaxiality and wear resistance are strict. The basic feature of the cylinder barrel is deep hole processing, which has always troubled the processing staff.

     The main hydraulic cylinder of the hydraulic bending machine includes an end cover, a cylinder block, an outer piston rod, a flange sleeve, an inner piston rod, a screw sleeve, a nut and a gland; the end cover is fixed at one end of the cylinder, the screw sleeve and the nut And the gland is fixedly arranged on the other end of the cylinder, the outer piston rod is arranged in the cylinder, the flange cover is on the piston end of the outer piston rod, the piston end of the inner piston rod extends into the outer piston rod, the inner piston rod The rod end is fixedly installed on the end cover, the inner piston rod.

     Compared with the traditional hydraulic cylinders of the same kind, the hydraulic cylinder has an inner rodless cavity and a rod cavity, so it has a unique rapid driving function. It can still be easy under the hydraulic system of the same driving condition, the cylinder is placed under the cylinder or the knife is dropped without gravity. Achieve the two-stage speed increase function; the contact force area of the screw sleeve is much larger than the adjustment nut of the main hydraulic cylinder of the traditional bending machine, thereby improving the contact rigidity and stability and ensuring a better limit accuracy.

    With the further development of industry, various industrial sectors, especially petrochemicals, automobiles, high-tech, etc., have put forward higher requirements for the manufacture of hydraulic bending machine molds. This has further strengthened the research and development of shearing machines. In the past few years, the R&D and manufacturing of molds for CNC 250-ton hydraulic plate bending machines will become more sophisticated, complex and efficient.

     As for the 250-ton hydraulic plate bending machine mold, it is the tool used by the manufacturer to form and process the sheet, and the mold is composed of a variety of different parts. The composition of the mold for different purposes is also different. The processing used The parts are also different. The main method of operation is to realize the processing of the shape of the article by changing the physical state of the molded material. Under the pressure of a 250-ton hydraulic plate bending machine, the blanks are formed into different shapes and sizes through the action of force.

    As for the 250-ton hydraulic sheet bending machine mold, it is divided into two kinds of molds, an upper mold and a lower mold, which are used for sheet metal stamping and forming and separation. The forming mold we are talking about is the cavity, and the separating mold is the cutting edge.

    Many manufacturers now choose molds of the following materials when choosing CNC 250-ton hydraulic plate bending machine molds:

    Many of the 250-ton hydraulic plate bending machine molds on the market now use materials such as T8, T10, and T10A. Although the quality of the molds of several materials is qualified, if you want to manufacture The quality of the mold is superior, so you can choose those mold products made of 42CrMo material.

    When choosing, it is mainly to look at the strength, toughness and wear resistance of the mold. Under normal circumstances, the mold made of Cr12MoV steel can be used for production to meet the needs of customers. Of course, if it is made of higher-priced 42CrMo steel The quality of the production will be better if the mold is used. This is mainly because 42CrMo is a high-strength alloy quenched and tempered steel. Its strength and toughness are very good, and it can be processed at a temperature of about 500 degrees.