Introduction to the Principle, Structure, and Performance of a Fully Automatic Hydraulic Swaging Machine

Release Date:

2023-02-20 16:34

Source:

　　 Fully automatic hydraulic tube reducing machine Introduction to the principle, structure, and performance

　　New type Fully automatic hydraulic tube reducing machine Hydraulic technology is employed to feed round bars, deformed reinforcing bars, and other components requiring diameter reduction into specialized grinding tools for cold‑shrinkage and compressive forming. This process significantly increases the density of the compressed steel, thereby enhancing its compressive strength, while maintaining its ductility and impact toughness. As a result, the strength of the threaded portion matches that of the shank, addressing the issue of reduced pressure resistance and impact toughness caused by lathe‑induced surface spalling. The equipment is ideally suited for processing large‑diameter round bars, anchor bolts, double‑ended structural bolts, high‑speed bridge bolts, as well as for manufacturing mining bolts, anchoring bolts, and long‑rod bolts. It can simultaneously compress the material to the desired rolled diameter, increasing both its density and length, and improving the tensile strength of anchor bolts. It serves as an effective alternative to traditional lathe‑based peeling processes.

　　Structure and Performance of the New Fully Automatic Hydraulic Pipe Sizing Machine:

　　1. Frame: The frame is fabricated by welding channel steel, with the bottom and sides welded using steel plates. One end serves as an oil tank, while the other end accommodates the electrical control cabinet and the hydraulic components. The upper cover of the frame is welded to the main structure via an intermediate plate, thereby forming the complete body.

　　2. Clamping position.

　　3. Tool Feed Box: The tool feed box is mounted on the cover at one end of the machine’s oil tank and is equipped with a hydraulic cylinder. The front end of the cylinder is fitted with a carbide die. An automatic water‑filling or oil‑charging device is installed at the front upper portion of the die, which is filled with oil or water.

　　4. Guide shafts: Two parallel guide shafts are installed between the clamping box and the feed box. The carbide die at the front end of the feed-box cylinder is supported by a guide sleeve; the cylinder performs both forward and return strokes to complete the reduction process.

　　5. Hydraulics: When the motor drives the gear pump, hydraulic fluid is delivered through control valves and other components to two hydraulic cylinders. One cylinder controls the clamping mechanism, enabling both clamping and releasing actions, while the other pushes and retracts the cemented carbide die to complete the reduction process.

　　6. Electrical Control Box: The electrical control system serves as the command center of the entire machine, employing advanced PLC technology to input various commands into the controller (computer). Precise hydraulic components clamp the workpiece, advance the mandrel to reduce its diameter, retract the mandrel, and release the workpiece—while simultaneously applying lubricant during the diameter-reduction process. This sequence of operations is completed, resulting in the desired reduction in diameter.

　　7. Cooling Fan: Mounted on the underside of the tool feed housing, it cools the hydraulic oil in the hydraulic system, stabilizes system operation, and prevents excessive oil temperature from causing low hydraulic pump pressure.

　　A steel pipe diameter-reducing machine is a non‑drilling manufacturing and processing device, whose key advantages and features are readily apparent, as follows:

　　It boasts high production efficiency, a simple manufacturing process, ease of operation, material savings, and stable product quality. This method leverages hydraulic technology to reduce the diameter of round bars, threaded steel, and similar materials to fit within the inner bore of a specialized cold‑shrinking forming die. The density of the reduced section can be further increased, thereby enhancing the tensile strength of the raw material. Meanwhile, ductility and fracture toughness remain unchanged, ensuring consistent compressive strength between the threaded portion and the shank, and addressing the drawbacks of reduced compressive strength and impact toughness caused by flaking on CNC lathes.

　　It can serve as an ideal machine for producing large-diameter round bars, anchor bolts, multi‑head construction screws, and highway bridge fasteners, as well as for manufacturing mining bolts, anchoring bolts, and long‑rod screws. This equipment can simultaneously reduce material to the desired rolled diameter while increasing its relative density and length, thereby enhancing the compressive strength of anchor bolts. It is a viable alternative to CNC lathe peeling processes.

Introduction to the Application Scope of Fully Automatic Hydraulic Swaging Machines

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