1. Application of the hydraulic manipulator: It supports the cantilever end of the unwinding machine’s reel, enhancing the rotational rigidity of the reel. The auxiliary support consists of an elbow-link mechanism driven by a hydraulic cylinder to raise or lower the swing arm. During unwinding, the swing arm is raised to support the cantilever end of the unwinding machine; during winding, the swing arm is lowered. The raising or lowering of the support arm does not interfere with the trolley’s entry or exit.

2. The transmission system drives the reel to rotate, and is composed of a DC motor, a gear reduction unit, and other components. The pressure rollers are raised and lowered by hydraulic cylinders. The unwinding process maintains constant tension, and the tension level is adjustable. A disc-type pneumatic brake device is installed at the tail end of the reel’s main shaft.

3. Purpose of the feeding guide and clamping device: To feed the sheet material into the feeding and drawing machine. The feeding guide is mounted on the frame of the straightening and drawing machine, and its guiding plate is swung by an oil cylinder. The scraper plate is extended and retracted by an oil cylinder to accommodate the leading edges of materials with different coil diameters.

4. Hydraulic Shear Structure and Applications: This machine is used to cut irregularly shaped sheet metal blanks, preparing them for subsequent processing steps. It is driven by hydraulic cylinders. When cutting sheets of varying thicknesses, the gap between the shear blades can be manually adjusted. The four-sided shear blades feature interchangeable cutting edges that can be used alternately. The shearing process cuts from top to bottom, with burrs directed upward. The machine frame is constructed by welding steel plates, and the upper and lower blade holders are made of cast steel. The shear blades are four-sided, made of SKD-11 material with a hardness of HRC61±1º per set. Hydraulic Power: Hydraulic Shearing—Hydraulic Cylinder: FA-Φ150mm (2 units).

5. The swing bridge spans across both ends of the pit and consists of an arc-shaped support surface made up of a motor-driven central bridge and several idler rollers. As the material head advances, the central bridge swings upward to facilitate material passage. Once the material head is fed into the roller clamp and securely clamped, the central bridge swings down again, forming a storage loop. The storage loop pit is equipped with photoelectric switches positioned at upper and lower material levels, and the longitudinal shear machine serves as the main speed controller for the production line.

6. Structure and Application: This device is used for positioning along the width of the steel plate to prevent deviation. On each side of the steel plate’s width, there is a vertical roller mounted on its own sliding carriage. By manually adjusting the carriages along the guide rails in the width direction of the plate, the device can accommodate plates of varying widths. The vertical rollers have undergone quenching treatment, and their surfaces have been chrome-plated to increase surface hardness and resist mechanical wear. The system is manually controlled and consists of guiding rollers on both sides, movable carriages, lead screw and rail mechanisms, and adjustment handwheels. There are three guiding vertical rollers on each side, with a specified roller diameter. The guiding adjustment handwheel is located on the operator’s side; the two guiding rollers on either side can be adjusted independently and moved simultaneously to ensure alignment.

7. Single-blade slitting machine—main mechanism and applications: The slitting machine is a device that cuts coil materials lengthwise into strips of various widths. By simply swapping out the modular spacer sleeves, the width of the finished slits can be flexibly adjusted. The blade shafts are adjusted using a lower fixed shaft and an upper shaft that is synchronized via a worm-gear mechanism, allowing for highly precise control of the gap between the upper and lower shafts. Both the upper and lower blade shafts are secured axially by nuts, and each shaft end is equipped with a blade-protecting sleeve. This machine is driven by a DC motor and can operate in both forward and reverse directions. It features a side-opening frame, making blade replacement particularly convenient.

7.1 Tool Spindle Lock: The nut secures the tool, featuring a wooden-board-type unloading mechanism and equipped with four Taiwan-made hydraulic nuts.

Main bearings: NSK bearings from Japan

7.2 Tool Holder Movement: The tool holder moves via hydraulic actuation for both entry and exit, while the upper tool spindle is electrically raised and lowered. Rotational power is supplied from a 160-kW DC motor mounted at the fixed end of the tool spindle, and the rotational speed is regulated by a DC controller.

8. Structure and Application: The edge-material coiler is a device used to wind up the edge materials generated after slitting. Equipped with a tension control system, this coiler neatly and orderly winds the edge materials into compact rolls. It also features an expansion-and-retraction mechanism for manual material removal. Positioned at the discharge side of the slitting machine, it collects the waste edge materials produced from the longitudinal cutting of the sheet metal, automatically arranging them in linear fashion and incorporating an expansion feature. The waste-material coiler is driven by an AC motor, with adjustable speed and winding torque. The winding drum adopts a mechanically expandable and contractible design, ensuring tight and dense material collection; manual unloading is performed, and the waste materials roll into a designated shallow pit for waste disposal. The material-transfer bridge is pneumatically oscillating.

9. The swing bridge spans across both ends of the pit and consists of a hydraulically swinging central bridge and an arc-shaped support surface made up of several idler rollers. As the material head advances, the central bridge swings upward to facilitate material passage. Once the material head is fed into the roller clamp and securely clamped, the central bridge swings down, forming a storage loop. The storage loop pit is equipped with photoelectric switches positioned at upper and lower material levels, and the longitudinal shear machine serves as the main speed controller for the production line.

10. Flat-type roller tensioner with steel strip guide (without this device, the strip entering the tension station is more likely to deviate).

10.1 Hydraulic Shear: The frame is welded from steel plates, and the upper and lower blade holders are made of cast steel. Blades: Four-sided blades, material: SKD11, hardness: HRC61±1º per set. Hydraulic Power: Hydraulic shearing—hydraulic cylinders: FA-Φ150mm (2 units). Guide rollers and feeding support plate.

10.2 The discharge side of the tensioner is equipped with a material-guiding roller whose surface is coated with polyurethane胶. The roller shaft end is fitted with a speed encoder for the winding machine. The tensioner features a feeding support plate at the material head, facilitating easy feeding into the clamping jaws of the winding machine.

11. Hydraulic expansion and contraction, hydraulic jaws; expansion and contraction range: Φ200/508 mm. The drum spindle is made of 42CrMoV steel, forged, and boasts high load-bearing capacity. It features a closed-type gearbox with gear oil lubrication. Main materials: The drum is made of 40Cr steel, subjected to quenching and tempering, outer cylindrical grinding, and surface chrome plating; the spindle is made of 42CrMoV steel, also quenched and tempered; the frame is constructed from welded steel plates and undergoes annealing treatment; the transmission gears are made of 20CrMnTi steel and are likewise quenched and tempered.

12. The trolley consists of a chassis and a lifting material rack. The steel plate and the four walking wheel seats on the chassis are mounted on two steel rails, along with four guide posts and a transmission shaft. The trolley moves forward via a gear motor driven by a reducer and chain drive. The material rack is equipped with idler rollers whose roller surfaces are coated with polyester rubber (all rubber coatings are made of polyurethane, the same applies hereafter). The lifting mechanism is actuated by hydraulic cylinders. The traveling speed is 10 to 15 meters per minute. The frame is welded from steel plates (which must undergo annealing and artificial aging treatment to relieve internal stresses; all welded components under this contract are required to meet this specification). The wheel material is GCr15, hardened to an HRC of 60.

13. Hydraulic manipulator auxiliary support: The steel plate shall be welded and annealed. Purpose: To support the cantilever end of the unwinding machine’s reel, thereby increasing the rotational rigidity of the reel. The auxiliary support consists of a toggle-link mechanism driven by a hydraulic cylinder to raise or lower the swing arm. During unwinding, the swing arm is raised to support the cantilever end of the unwinding machine; during winding, the swing arm is lowered. The raising or lowering of the supporting arm does not affect the movement of the trolley in or out.

14. Composition and Function of the Hydraulic System: The hydraulic system controls the operation of the hydraulic components throughout the entire production line. It employs centralized control and consists of one hydraulic station, multiple valve manifolds, and several pipelines. The main components include the oil tank, the oil pump-motor assembly, the hydraulic valve manifold, and the hydraulic pipelines.

15.1 Composition and Applications: The pneumatic system consists of an air source (provided by the user), air source treatment components, solenoid valves, associated piping, and cylinders. The solenoid valves and pneumatic control components are imported products; the air source is provided by the user.

16. Control System

16.1 Composition and Applications: The system comprises a main operator’s console, an auxiliary unwinding console, and an auxiliary coiling console. The entire line adopts centralized control. The main operator’s console features digital display, high- and low-speed adjustment, manual feed, continuous slitting, and fault alarm functions. The speed-control system and programmable logic controller (PLC) are both products of Siemens GmbH from Germany. Other electrical control components are either imported products or joint-venture products of comparable quality. The main control console, auxiliary control consoles, button boxes, detection elements, as well as cables and wires—all utilize touch-screen control, enabling convenient setting and modification of production process parameters—including speed—and facilitating easy switching among manual, single-cycle, and automatic modes, while also allowing real-time monitoring of the operational status of each component. This ensures safe and efficient operation of the production line.