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我国冲床车间噪声级高达90～110dB(A),其产生过程比较复杂.冲床借助于冲头动能冲裁零件,发生冲击过程.另外,降低冲床噪声同时,要考虑加工质量、生产率、成本以及操作方便等许多因素,因此要降低冲床噪声,显得既迫切而又艰巨.我国现有冲床噪声出厂标准,只考核空载噪声级.由于冲床转速一般较低,空载噪声级不高,而负载时的噪声,远高于空载噪声.所以,尽管制造部门冲床产品噪声级指标符合出厂标准,但在实际使用中,仍产生严重噪声,给人们带来危害极大.为此,提出研究冲床降噪课题是非常必要的.本文主要研究冲床曲轴连杆机构的负载噪声.
China’s press workshop noise level as high as 90 ~ 110dB (A), the production process is more complex. Punch punch punch parts by impact energy, the impact process. In addition, reduce punch noise at the same time, to consider the processing quality, productivity, cost and operation Convenience and many other factors, so to reduce punch noise, it is urgent and arduous.China’s existing punching noise factory standards, only the assessment of no-load noise level.Because the punch speed is generally low, no-load noise level is not high, and load Of the noise, far higher than the no-load noise.Therefore, although the manufacturing sector punch noise level indicators in line with the factory standards, but in actual use, there are still serious noise, to bring great harm to people.To this end, Noise problem is very necessary.This paper mainly studies the load noise of crankshaft connecting rod mechanism of punch press.