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在电机模具中,常以橡胶板作为卸、压料弹顶装置中的弹性垫料,应用甚广。但对橡胶板的选用,一般在设计或使用时,大多凭经验或现场调试解决。本文拟推荐一些实用公式和图表,以便在选用时作参考。橡胶板的形状和尺寸,可按下列各式进行计算: 式中:P—工作压力(公斤) бp—橡胶板单位压力(公斤/厘米~2) F—橡胶板承载有效面积(厘米~2) ε—橡胶板压缩应变(％) K—系数(K_1=ε/(1-ε)K (表1) E—橡胶板弹性模量(公斤/厘米~2) (表2) △h—橡胶板工作压缩量(厘米) h—橡胶板自由状态厚度(厘米) 橡胶板要求在工作时的最小压缩应变为10％,最大则以不超过35％为宜,以保证工作时有一定的预压力和使用寿命。由于0.1≤ε≤0.35,故一般取ε=0.25计算。由于电机模具中所使用的橡胶板形状、尺寸是多种多样、为了计算方便,采用形状系数
In the motor mold, often as a rubber sheet unloading, pressing the top device in the elastic padding, a wide range of applications. However, the selection of rubber plates, usually in the design or use, most of the experience or on-site debugging to solve. This article intends to recommend some practical formulas and charts, so that when used as a reference. The shape and size of the rubber plate can be calculated according to the following formulas: Where: P-working pressure (kg) бp-rubber plate unit pressure (kg / cm ~ 2) F- rubber plate bearing effective area ε-rubber plate compressive strain K-factor (K_1 = ε / (1-ε) K (Table 1) E-rubber plate elastic modulus (kg / cm 2) Working compression (cm) h- rubber plate free state thickness (cm) rubber sheet requirements at work, the minimum compressive strain of 10%, the maximum is not more than 35% is appropriate to ensure that work have a certain pre-pressure and Because of 0.1 ≤ ε ≤ 0.35, it is generally taken ε = 0.25 calculation due to the motor mold used rubber plate shape, size is varied, in order to facilitate the calculation, the use of shape factor