It looks like you’re asking about the process of making jaw crusher plates. Jaw crusher plates (also called jaw dies or liners) are critical wear parts in jaw crushers, used in crushing hard materials like rocks and ores. Below is a step-by-step guide to manufacturing jaw crusher plates:
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Process of Making Jaw Crusher Plates
1. Material Selection
– Jaw plates are typically made from high manganese steel (e.g., Mn14%, Mn18%, Mn22%) due to its excellent wear resistance and work-hardening properties.
– Other options include high chrome iron (HCI), martensitic steel, or composite alloys for specific applications.
2. Design & Pattern Making
– CAD modeling is used to design the plate profile based on the crusher model (e.g., Metso, Sandvik, Terex).
– A pattern (wooden or metal) is created for casting.
3. Casting Process
– Sand Casting: Common for manganese steel plates.
– Molds are prepared using resin-bonded sand.
– Molten steel is poured into the mold at ~1500°C.
– Investment Casting: Used for more precise, complex shapes.
– Heat treatment (quenching & tempering) improves hardness and toughness.
4. Machining & Finishing
– Excess material is removed via CNC machining or grinding.
– Critical surfaces are milled to ensure proper fit in the crusher.
– Holes for mounting bolts are drilled.
5. Quality Control
– Hardness testing (Brinell/Rockwell) ensures wear resistance.
– Dimensional checks confirm compliance with OEM specs.
– Non-destructive testing (NDT) like ultrasonic or magnetic particle inspection detects internal defects.
6. Surface Treatment (Optional)
– Some plates undergo hardening treatments like flame hardening or laser cladding for extended lifespan.
– Coatings (e.g., tungsten carbide overlay) may be applied for abrasive applications.
7. Final Assembly & Packaging
– Plates are paired (fixed and movab.jpg)
jaws).
– Packaged to prevent corrosion during storage/transport.
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Key Considerations
– Wear Resistance: Manganese steel hardens under impact, improving longevity.
– Fit & Compatibility: Must match the crusher’s toggle plate and pitman movement