
The jaw crusher frame is the installation basis for the entire crusher components. It bears a great impact load during work, and its quality accounts for a large proportion of the whole machine (about 50% for the casting frame and about 30% for the welding frame), and the processing and manufacturing workload is also relatively large. The strength and rigidity of the frame have a great influence on the performance of the whole machine and the life of the main parts.
The jaw crusher frame is divided into structure, there are integral frame and combined frame.
Due to the difficulty of manufacturing, installation, and transportation, the overall frame is not suitable for large-scale crushers and is mostly used by small and medium-sized crushers. It is more rigid than the combined frame, but it is more complicated to manufacture.
The combined frame is used for large-scale crushers. It has two forms: one is the combination of pins and bolts between the frame walls. For example, the 1200×1500 jaw crusher frame is divided into upper and lower parts, the upper frame and the lower frame. It is connected by bolts, and the keys and pins between the joint surfaces bear strong shearing force. The keys and pins also play the role of assembly and positioning.
The other is to use a welding combination, such as a 900×1200 jaw crusher frame. Its rigidity is better than that of a combined frame connected by an insert pin, and it is also more convenient to process, assemble, and disassemble. The 1500×2100 jaw crusher adopts a welded combined frame.
From the point of view of the manufacturing process, the integral frame is divided into an integral casting frame and an integral welding frame. The former is more difficult to manufacture, especially single-piece small batch production, while the latter is easy to process and manufacture, and the machine is lighter, but requires relatively high welding technology and welding quality, and requires the elimination of internal stress after welding.
In addition, cast steel is a process with high energy consumption, and from the perspective of energy saving, the welding frame should also be vigorously developed. There is no doubt that the jaw crusher adopts a welding frame in the development direction.