G72型弓锯床使用一段时间后,噪声变大,分析原因大致为:(1)开式齿轮传动,粉尘粘于啮合面,造成齿面磨损。(2)安装齿轮轴的一端皆为悬臂。(3)由于夹布胶木做的无声齿轮被磨损换成铸铁、钢、铜等金属齿轮,与大齿轮啮合后噪声大。(4)锯割工件时交变的载荷,给摇臂轴与轴套,传动轴与轴套,以及连杆两端的销与套间,相互带来单边磨损,造成间隙过大,严重时在锯弓往复换向瞬间出现明显的撞击震动。由于锯床本身结构既定,不可能对以上第一、二两点作大的改动,于是根据一般工厂所具有的条件,力求对第三点设法降低噪声。 G72 type bow sawing machine use for a period of time, the noise becomes larger, the analysis of the reasons are as follows: (1) open gear drive, dust stick to the meshing surface, resulting in tooth wear. (2) One end of the mounting gear shaft is cantilevered. (3) Since the silent gear made of cloth and bakelite is worn and replaced by metal gears such as cast iron, steel and copper, the noise is large after meshing with the big gear. (4) alternating load when sawing the workpiece, to the rocker shaft and shaft sleeve, shaft and sleeve, as well as the pin and the two ends of the connecting rod, bring unilateral wear and tear each other, causing the gap is too large, serious Saw bow reciprocating moment obvious impact shock. As the sawing machine itself has a definite structure, it is impossible to make big changes to the above first and second points. Therefore, according to the conditions of the general factory, the third point is to try to reduce the noise.