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目前我国的型材生产厂中,大都采用模铸、热轧、拉拔、退火、矫直等工序,其中拉拔产生的噪声最大。以我厂为例,热轧时产生的噪声达90dB(A),矫直时为100dB(A),而拉拔机(15t)工作时,噪声最高可达115dB(A)。 我厂目前使用的是链式拉拔机,属于四、五十年代产品。虽然设备陈旧,但由于其结构简单、方便实用且效率较高,故目前在全国仍普遍使用。但这种拉拔机工作时
At present, China’s profile production plant, the majority of die-casting, hot-rolled, drawing, annealing, straightening and other processes, of which the largest noise drawing. Take our factory as an example, the noise produced by the hot rolling reaches 90dB (A), while the straightening is 100dB (A), while the drawing machine (15t) can work with noise up to 115dB (A). I plant is currently using a chain drawing machine, belonging to the fourth and fifties products. Although outdated equipment, but because of its simple structure, convenient and practical and high efficiency, it is still widely used throughout the country. But when this kind of drawing machine is working