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利用机械抛掷完成其工艺过程的铸造设备是很多的,如抛掷器、抛砂机、双轮松砂机、冷却提升机等都属此类设备。因为抛掷机构的运动学参数直接影响到工艺过程的质量、设备的生产率和效率,所以正确地选择和确定合理的运动学参数是十分重要的。为此,必须籍助于正确的理论公式和相应的计算方法。所以说抛掷机构的运动学参数计算原理是设计此类设备的理论根据。已往的计算方法,或忽略了摩擦力的影响,或做了某些与实际出入较大的假定,使计算结果偏差较大。作者吸取了前人的经验,在较为严密和较为广泛的条件下导出了运动方程式,接着用数学方法进行了简化处理,得出了一组计算公式。这组公式的特点是准确性较前有所提高,适应面有所加宽,而且一般掌握初等数学的技术人员都可以应用结论公式进行计算。
The use of mechanical throwing to complete the process of casting equipment is many, such as thrower, sand throwing machine, two-wheel sanding machine, cooling hoist and so on belong to this type of equipment. Because the kinematic parameters of the casting mechanism directly affect the quality of the process, the productivity and efficiency of the equipment, it is very important to select and determine reasonable kinematic parameters correctly. To this end, we must rely on the correct theoretical formula and the corresponding calculation method. So throwing mechanism kinematics parameter calculation principle is to design the theoretical basis for such equipment. The past calculation method, or ignoring the impact of friction, or do some large discrepancies with the actual assumptions, the calculation results deviate larger. The author draws on the experience of his predecessors, derives the equations of motion under more stringent and broader conditions, and then simplifies them using mathematical methods to arrive at a set of formulas. The characteristic of this set of formulas is that the accuracy is improved compared with the previous ones, the adaptability is broadened, and the general mathematical technicians can use the formula to calculate.