The dimensional accuracy and shape tolerance requirements of agricultural machinery forgings will vary depending on the specific forgings type, usage requirements and manufacturing process. In general, the following are some common dimensional accuracy and shape tolerance requirements: Dimensional accuracy: The dimensional accuracy requirements of agricultural machinery forgings are usually specified in accordance with relevant national standards, such as GB/T 1800X series (domestic standard) or ISO 2768 series (international standard). Where, GB/T 1800.X is a series of tolerance levels, the number X represents different levels, such as GB/T 1800.1 is the general tolerance level. Dimensional accuracy requirements can involve linear size, Angle measurement, flatness, roundness, cylindricity, parallelism, verticality and so on. Shape tolerance: The shape tolerance requirements of agricultural machinery forgings mainly involve the shape and contour characteristics of the parts. Shape tolerances can be defined using standard tolerance systems such as ISO 1101 (international standard) or GB/T 17490 (domestic standard). Shape tolerance usually includes straight line character, curve character, surface character, inclination, plane profile and so on. The selection of dimensional accuracy and shape tolerance should be based on the functional requirements of agricultural machinery forgings, material characteristics, manufacturing process and other comprehensive considerations. At the same time, the appropriate dimensional accuracy and shape tolerance requirements should also be determined according to the actual use and design requirements, in coordination with the manufacturing process personnel. Designers should ensure that dimensional accuracy and shape tolerances meet the functional and quality requirements of the product and that manufacturing costs are as low as possible.
