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Any crusher and grinding machine does not use only one force to grind rock materials. It usually uses a certain force as the main force, combined with other types of forces. Therefore, the force of the stone production line machine to dry rock materials is complicated. In order to facilitate analysis and research, we often focus on the main forces, and only make incidental examinations of the effects of other forces. The force application conditions of stone production line machinery and equipment can be divided into crushing, splitting, breaking, grinding, peeling and impact. Depending on the shape of the mechanical force applied, the strength of the rock material that should be considered is also different. For crushing, the compressive strength of the rock material should be considered. For splitting, attention should be paid to its tensile strength. For breaking, attention should be paid to the strength of the rock material. Flexural strength When grinding and peeling rock materials, its shear strength should be considered. The stone production line machinery uses its working parts to repeatedly act on rock materials with dynamic loads, so it has a certain impact effect. When rock material is broken by impact, its impact strength should be considered.