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Cone Crusher Eccentric Bushing

The cone crusher eccentric bushing, a core rotating component around the main shaft, is crucial for driving the crushing motion. Its main functions are generating eccentric motion (converting rotational motion into orbital movement of the main shaft and moving cone), transmitting torque, bearing loads (up to thousands of kilonewtons), and serving as a lubrication channel. Structurally, it is a cylindrical or conical sleeve with an offset inner bore, consisting of components such as the bushing body (high-strength alloy steel or cast steel like 42CrMo or ZG42CrMo), eccentric bore (with 5–20 mm offset), gear teeth (involute profile, modulus 10–25), lubrication passages, flange/shoulder, and wear-resistant liner (bronze or babbitt metal). For large bushings (outer diameter >500 mm), the casting process involves material selection (ZG42CrMo), pattern making (with shrinkage allowances), molding (resin-bonded sand mold), melting and pouring (controlled temperature and flow rate), cooling and shakeout, and heat treatment (normalization and tempering). The machining process includes rough machining, gear machining, heat treatment for hardening (induction-hardened gear teeth to HRC 50–55), finish machining (grinding to AGMA 6–7 accuracy), installation of wear-resistant liner, and balancing. Quality control covers material testing (chemical composition and mechanical properties), dimensional checks (CMM and laser tracker for eccentricity and concentricity), hardness and microstructure testing, non-destructive testing (UT and MPT), and performance testing (rotational and load tests). These ensure the eccentric bushing meets precision and durability requirements for efficient cone crusher operation in heavy-duty applications

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Cone Crusher Adjustment Cap

The cone crusher adjustment cap is a key component in the crusher's gap adjustment system, mounted on top of the adjustment ring or upper frame. Its main functions include controlling the crushing gap (enabling precise adjustment of the distance between the moving and fixed cones), locking components (securing the adjustment ring after adjustment), distributing loads, and supporting seals. Structurally, it is a cylindrical or conical component consisting of the cap body (made of high-strength cast steel like ZG310–570 or forged steel), threaded bore or external threads, locking mechanisms (such as locking slots, set screw holes, and tapered interfaces), top flange, seal grooves, reinforcing ribs, and indicator marks. The casting process for medium to large adjustment caps involves material selection, pattern making (with shrinkage allowances and draft angles), molding (using sand molds), melting and pouring (with controlled temperatures and flow rates), cooling and shakeout, and heat treatment (normalization and tempering). The machining and manufacturing process includes rough machining, thread machining, locking feature machining, finish machining, surface treatment, and assembly of seals. Quality control processes cover material validation (chemical composition and hardness testing), dimensional accuracy checks (using CMM and thread gauges), structural integrity testing (NDT like MPT and UT), functional testing (adjustment range and locking effectiveness verification), and seal performance testing. These ensure the adjustment cap has the required precision, strength, and reliability for consistent crushing gap control, guaranteeing optimal crusher performanc

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Cone Crusher Upper Frame

This paper elaborates on the cone crusher upper frame, a foundational structural component located in the upper section of the crusher, which supports key assemblies like the fixed cone, adjustment ring, and feed hopper. Its main functions include structural support (bearing loads up to hundreds of tons and transferring them), forming the crushing chamber (cooperating with the moving cone), ensuring component alignment, and protecting internal parts. The upper frame, a large hollow cylindrical or conical casting, consists of components such as the frame body (made of high-strength cast steel ZG310–570 or ductile iron QT600–3), fixed cone mounting surface, adjustment ring guide, flange connections (top and bottom flanges), reinforcing ribs, lubrication and inspection ports, and optional cooling jacket, each with specific structural features. The casting process of the upper frame involves material selection, pattern making (with shrinkage allowances and draft angles), molding (using green sand or resin-bonded sand molds), melting and pouring (with controlled temperatures and flow rates), cooling and shakeout, and heat treatment (normalization and tempering for cast steel, annealing for ductile iron). Its machining and manufacturing process includes rough machining, intermediate heat treatment, finish machining (of flanges, internal taper, and adjustment ring guide), and surface treatment. Quality control processes cover casting quality inspection (ultrasonic and magnetic particle testing), dimensional accuracy checks (using CMM and laser tracker), material testing (chemical composition and hardness testing), load testing, and assembly fit verification. These processes ensure the upper frame has sufficient structural integrity and dimensional precision to guarantee stable operation of the cone crusher in heavy-duty applications

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Cone Crusher torch ring

This paper details the cone crusher torch ring, a vital sealing and protective component situated between key assemblies like the adjustment ring and main frame, or moving cone and fixed cone. Its primary functions include high-temperature sealing (withstanding up to 150°C), preventing contamination, thermal insulation, and vibration absorption, requiring heat resistance, oil resistance, and mechanical strength. The torch ring has a composite structure, consisting of a metal framework (low-carbon or alloy cast steel) with a U/L-shaped cross-section, a sealing liner (high-temperature rubber, graphite composite, or metal-reinforced felt), retention grooves, flange edges, and optional vent holes. The metal framework is produced via sand casting: material selection (Q235 or ZG230–450), pattern making with shrinkage allowances, green sand molding, melting and pouring (1450–1480°C), cooling and shakeout, and annealing for stress relief. The machining and manufacturing process involves framework machining, sealing liner preparation, liner bonding with heat-resistant adhesive, finishing, and optional surface treatment. Quality control includes material testing (chemical composition, tensile strength, hardness), dimensional checks (CMM for accuracy), bond strength testing, seal performance evaluations (pressure and heat cycling), and visual/functional inspections. These ensure the torch ring provides reliable sealing in high-temperature, high-vibration conditions, safeguarding internal components and ensuring efficient crusher operation.

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Cone Crusher Hopper

This paper elaborates on the Cone Crusher Hopper component, a crucial material guiding part located at the top of the crusher. Its main functions include material collection and storage, uniform distribution, impact buffering, and contamination prevention, requiring high wear resistance, structural strength, and corrosion resistance. The hopper is typically funnel-shaped or rectangular, composed of the hopper body, feed grate/screen, wear liners, reinforcing ribs, mounting flange, access door, and optional vibration device mounts, each with specific structural features and roles. For cast steel variants, the casting process involves material selection (high-strength cast steel like ZG270–500), pattern making, molding, melting and pouring, cooling and shakeout, heat treatment, and casting inspection. Most hoppers, however, are fabricated from steel plates through plate cutting, forming and bending, welding assembly, post-weld treatment, machining of mounting features, liner installation, and surface treatment. Quality control processes cover material validation, dimensional accuracy checks, weld quality inspection, structural integrity testing, liner performance testing, and final inspection. These ensure the hopper can withstand abrasive wear and impact, guaranteeing continuous and efficient operation of the cone crusher in relevant applications.

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Cone Crusher locking nut

This paper provides a detailed introduction to the locking nut component of cone crushers. As an important fastening component, it is mainly used to secure key assemblies such as the main shaft, fixed cone liner, or adjustment ring. It can realize functions including secure fixation, load distribution, and maintaining the crushing gap in cooperation with the adjustment ring. Its composition and structure include the nut body, threaded bore, locking mechanism (such as locking holes, set screws, and tapered surfaces), flange or shoulder, and wrench flat faces, with each part having a specific design and function. In terms of casting process, large-sized locking nuts often use gray cast iron, ductile iron, or cast steel, going through steps such as material selection, pattern making, molding, melting and pouring, cooling and cleaning, and heat treatment. The machining and manufacturing process covers steps like rough machining, machining of locking features, finish machining, surface treatment, and assembly with locking components. Quality control includes measures such as material testing, dimensional accuracy checks, thread quality inspection, locking performance testing, and non-destructive testing, ensuring that the component has good wear resistance, anti-loosening performance, and structural rigidity in high-vibration environments, thus guaranteeing the stable operation of the crusher.

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