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Fully Automatic Hydraulic Scrap Metal Crocodile Type Equipment Shearing Machine¹

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Product Description CategoryDetailed DescriptionBasic Information - Product NameFull-Automatic Hydraulic Scrap Steel Alligator Shear (also known as Full-Automatic Hydraulic Alligator-Type Scrap Shear)- DefinitionA heavy-duty, fully automated metal processing equipment specifically designed for shearing and recycling scrap steel (e.g., waste steel plates, steel bars, old structural steel, and scrap metal components). It adopts a hydraulic drive system and an "alligator-like" jaw structure to deliver high shear force for efficient scrap reduction.- Core Function1. High-force shearing: Cut large, thick, or irregular scrap steel into small, uniform pieces (50-300 mm) to facilitate transportation, storage, and subsequent recycling (e.g., melting in steel mills).2. Full automation: Realize automatic feeding, positioning, shearing, and discharge of scrap steel, reducing manual intervention and improving production efficiency.3. Scrap processing versatility: Handle various forms of scrap steel (plates, bars, pipes, profiles) without pre-processing.Technical Specifications - Shear ForceRanges from 100 tons to 1,200 tons (varies by model); large-tonnage models (800-1,200 tons) can shear scrap steel with thickness up to 300 mm or diameter up to 250 mm (for round bars).- Cutting Capacity- Scrap steel thickness: 5-300 mm (depending on shear force and material hardness).- Cutting length: 300-1,500 mm (adjustable via control system).- Processing efficiency: 5-20 cuts per minute (varies with scrap size and shear force).- Hydraulic System- Working pressure: 16-31.5 MPa.- Hydraulic oil type: Anti-wear hydraulic oil (e.g., 46# or 68#) suitable for heavy loads.- Oil tank capacity: 100-800 L (matches machine tonnage to ensure stable oil supply).- Automation & Control- Control system: PLC (Programmable Logic Controller) + touch screen; supports parameter setting (cutting length, shear speed, feeding frequency) and fault self-diagnosis.- Feeding mode: Automatic chain conveyor or hydraulic push plate (with photoelectric positioning to avoid overfeeding).- Discharge: Automatic conveyor belt or hopper for collecting sheared scrap.- Power Requirement- Motor power: 15-75 kW (large-tonnage models require higher power, e.g., 55-75 kW for 800-ton shears).- Voltage: 380V/400V three-phase industrial power (50/60 Hz, compatible with global industrial standards).- Dimensions & Weight- Length × Width × Height: 3,000-8,000 mm × 1,500-3,000 mm × 2,000-4,000 mm (varies by tonnage).- Machine weight: 5-50 tons (e.g., 5-10 tons for 100-300-ton shears; 30-50 tons for 800-1,200-ton shears).Working Principle1. Automatic Feeding: Scrap steel is conveyed to the shear jaw via the automatic feeding conveyor; photoelectric sensors detect the scrap position and stop feeding once it reaches the preset cutting length.2. Hydraulic Force Generation: The motor drives the hydraulic pump to convert electrical energy into hydraulic pressure; high-pressure oil is delivered to the main hydraulic cylinder.3. Shearing Process: The hydraulic cylinder pushes the movable jaw (upper jaw of the "alligator" structure) downward, and the fixed jaw (lower jaw) clamps the scrap steel. The two jaws form a shear angle, applying high shear force to the scrap until it is cut into small pieces.4. Automatic Discharge: After shearing, the movable jaw resets, and the sheared scrap falls onto the discharge conveyor, which transports it to a storage bin or truck.5. Cycle Operation: The machine repeats the "feeding → positioning → shearing → discharge" cycle automatically, controlled by the PLC system.Key Components1. Shear Jaws (Fixed & Movable):- Material: High-hardness alloy steel (e.g., Cr12MoV or NM450) with quenching treatment (hardness ≥ HRC 55) to resist wear and impact.- Design: "Alligator-like" curved structure to enhance clamping stability for irregular scrap.- Replaceability: Jaw blades can be replaced independently after wear to reduce maintenance costs.2. Hydraulic System:- Hydraulic pump: Gear pump or piston pump (high-pressure, high-flow for large-tonnage models).- Hydraulic cylinder: Single or double main cylinders (with piston rod surface chrome plating to prevent corrosion).- Relief valve & check valve: Ensure stable hydraulic pressure and prevent oil backflow (protecting the system from overload).3. Automatic Feeding & Discharge System:- Feeding conveyor: Chain-type or belt-type (with anti-slip surface to handle heavy scrap).- Discharge conveyor: Belt-type (high load-bearing capacity, easy to clean).4. Control System:- PLC: Main controller (e.g., Siemens S7 series) for programming and cycle control.- Touch Screen: Human-machine interface (HMI) for parameter adjustment, status monitoring, and fault display.- Photoelectric Sensors & Limit Switches: Ensure accurate positioning of scrap and safe operation of moving parts.5. Safety & Frame Structure:- Frame: Heavy-duty welded steel structure (with annealing treatment to eliminate internal stress) for high rigidity and stability.- Safety Devices: Emergency stop button, pressure overload protection, jaw anti-loosening device, and safety guard for the feeding area.Application Fields1. Scrap Metal Recycling Plants: Process waste steel, old steel structures, and scrap metal from demolition sites into recyclable raw materials for steel mills.2. Steel Mills & Foundries: Shear leftover scrap (e.g., steel plate offcuts, defective castings) generated during production to reuse as melting raw materials.3. Automotive Recycling Industry: Cut old car frames, engine blocks, and steel components into small pieces for metal separation (steel vs. non-ferrous metals like aluminum).4. Construction & Demolition Industry: Process scrap steel from building demolition (e.g., steel beams, reinforcement bars) to reduce volume for transportation.5. Hardware & Machinery Manufacturing: Dispose of waste metal scraps (thick steel plates, large bars) from production lines to improve workshop waste management.Advantages1. High Shear Force & Efficiency: Hydraulic drive delivers stable, large shear force to cut thick/hard scrap steel; full automation achieves continuous operation (5-20 cuts/min), 3-5 times more efficient than semi-automatic models.2. Good Scrap Adaptability: "Alligator-like" jaw design clamps irregular scrap firmly, avoiding slippage during shearing; no need for pre-sorting or shaping of scrap.3. Labor Saving: Automatic feeding, shearing, and discharge reduce manual labor (only 1-2 operators needed for monitoring, compared to 3-4 for semi-automatic models).4. Safety & Stability: Equipped with multiple safety protections (overload, emergency stop, photoelectric guard); heavy-duty frame and hydraulic system ensure stable operation with low vibration.5. Cost-Effective: Reduces scrap transportation costs (by cutting scrap into small pieces) and improves scrap recycling value (uniform size is preferred by steel mills); replaceable jaw blades lower maintenance costs.Maintenance & Safety TipsMaintenance:1. Hydraulic System Maintenance:- Check hydraulic oil level and cleanliness daily; replace oil every 6-12 months (or after 1,000 operating hours) and clean the oil filter monthly.- Inspect hydraulic hoses and joints for leaks; replace damaged hoses immediately to avoid pressure loss.2. Shear Jaw Maintenance:- Check jaw blade wear weekly; sharpen or replace blades when the cutting edge becomes dull (dull blades cause uneven cuts and increase hydraulic system load).- Lubricate the jaw hinge points daily with high-temperature grease to reduce friction.3. Mechanical & Electrical Maintenance:- Inspect the feeding/discharge conveyor chains/belts weekly; adjust tension if loose and replace worn parts.- Clean the PLC and touch screen monthly; check electrical wiring for looseness to prevent short circuits.- Conduct a full machine inspection every 3 months (including frame welding points, hydraulic cylinder seals, and sensor accuracy).Safety:1. Operators must receive professional training; do not operate the machine without authorization.2. Wear personal protective equipment (PPE): Safety helmet, anti-impact glasses, cut-resistant gloves, and anti-slip work shoes.3. Do not put hands or tools into the shear jaw area during operation; keep a safe distance from the feeding/discharge conveyors.4. Test the emergency stop button and overload protection system before starting the machine each day; stop operation immediately if any fault is detected (refer to the HMI fault prompt for troubleshooting).5. Do not shear non-metallic materials (e.g., wood, plastic) or explosive items; do not exceed the machine's rated shear force (e.g., cutting scrap thicker than the specified capacity).

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