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A four‑column hydraulic press (also known as a hydraulic press) operates on the principle of Pascal’s law, using a hydraulic transmission system to transfer the pressure generated by the power unit (hydraulic pump and motor) to the actuator (hydraulic cylinder), thereby driving the slide to perform forming operations on the workpiece.
The roundness‑restoring machine is specifically designed to restore the roundness of wheel rims that have been welded and subsequently subjected to planing and rolling. Thermal deformation during welding can cause the rim to become elliptical or irregularly distorted; the roundness‑restoring machine uses powerful compression to return the rim to its standard circular shape.
The steel rim flattening and valve‑hole punching machine is a specialized double‑acting hydraulic press designed for the flattening of the bead seat and the punching of the valve hole on medium‑ and heavy‑duty tubeless wheel rims. This equipment integrates two processing steps into a single unit; positioned after the rolling operation in the steel wheel rim manufacturing process, it serves as an essential finishing tool prior to final machining of the finished rim.
The steel‑profile rim rolling machine is primarily used in the manufacture of wheels for automobiles, motorcycles, agricultural vehicles, and construction machinery. Its function is to subject long steel sections—typically pre‑rolled to form the complex contour of the rim, including features such as the bead seat and groove bottom—to compressive deformation at room temperature via multiple rolls, inducing plastic bending and ultimately producing an open‑ or closed‑type circular rim blank.
In 2012, it was recognized as "Jilin Science and Technology Enterprise" by Jilin Science and Technology Department ". In November 2013, it became the cooperative education base of Changchun Institute of Technology.
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