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