5.选择合适的套筒

(1)插销、O型套环 (图 1

请选择一个大小与需要旋紧或者旋松的螺栓相配 的套筒。将其插进扳手的铁砧后,再用插销和套 环将其固定住。拆卸套筒时,请按照与上述相反 顺序进行操作。

(2)活塞式(图 2

将位于铁砧正方形部位上的活塞与六角插槽上的 孔对准。然后压下活塞,将六角插槽安装在铁砧 上。检查活塞和孔是否彻底结合。当拆卸插槽 时,按相反顺序操作。

使 用 方 法

1.开关的操作(图 3

此工具上的开关具有开关马达及转换马达旋转方 向的功能。将开关设于标志在把手上的“R”位置 时,马达朝着顺时针方向旋转而旋紧螺栓。将开 关设于“L”位置时,马达朝着逆时针方向旋转而 旋松螺栓。而松开开关时,马达便停止旋转。

注意

改变扳手的旋转方向之前,请关掉开关并等到马 达完全停止。如在马达旋转时进行开关操作的 话,将就会烧毁马达。

2.旋紧或旋松螺栓

请事先选择一个与螺栓或螺母配套的六角套筒, 然后将此套筒装配在铁砧上,并用六角套筒扣住 所要旋转的螺母。将扳手对准螺栓,然后按下电 源开关冲击螺母数秒钟。如果螺母一直不能被紧 固地固定在螺栓上,则说明螺栓跟着螺母一起在 转。这时,请停止冲击,用另一个扳手固定住螺 栓头部然后再重新冲击或用手旋紧螺栓和螺母以 防它们滑动。

操作时的注意事项

1.确保线电压(图 4

有效旋紧转矩会受到线电压的影响。电压的减少 会降低有效旋紧转矩。

例如:如果您在200伏电压环境下使用220伏型扳 手时,转矩会降低至70%90%。需要使用电源延 长线时,应尽量使用短的延长线。当线电压较低

同时又要使用长的电源延长线时,请使用升压变 压器。线电压与旋紧转矩之间的关系如各图所 示。

2.在连续操作时不要接触减震器和电动锤

在连续旋转上紧过程中减震器和电动锤会变热, 所以在这过程中务必要小心不要接触它们。

3.使用最佳旋紧转矩

最适合螺母和螺栓的旋紧转矩因螺母和螺栓的材 料、尺寸而导。对小的螺栓施加过大的旋紧转矩 会导致螺栓的变形或断裂。旋紧转距随着操作时 间的增加而增大,请正确掌握对螺栓的操作时 间。

4.选择与螺栓相配的套筒

注意要选择使用与螺栓相配的套筒,使用不相配 的套筒时,不仅会影响旋紧力,还会使套筒或螺 母受损。

如使用已损坏了的、或已变形的六角或四角套 筒,由于无法得到适当的旋紧力,因而会导致旋 紧转矩的损失。

请注意套筒内部的磨损,并请在磨损程度加重之 前更换之。和螺栓尺寸配套的套筒示于表1

套筒牌号处的数值表示六角型孔的一边到另外一 边的距离(S)。

5.扳手的拿法

请用双手紧紧地握住冲击扳手的主柄和边柄。并 将扳手对准螺栓。

没有必要对扳手施加太大的力,只需施加可抵消 冲击力的力即可。

6.确保施紧转矩

以下各个因素与旋紧转矩相关。为了确保旋紧转 矩,必须在开始操作之前先用普通的扳手把螺栓 旋紧。

与旋紧转矩相关的因素如下:

(1)线电压

旋紧转矩会随着线电压的降低而减小。 (请参考 图 4

(2)操作时间

旋紧转矩会随着操作时间的增加而增大。但是, 旋紧转矩达到临界值后,即使操作时间再长旋紧 转矩也不再增大。(请参考 图 4

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Huawei WR 22SA manual 方 法, 操作时的注意事项

WR 22SA specifications

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