文档介绍：Procedure for rudder horn casting boring
挂舵臂镗孔工艺
（15#16#17#73400DWT）
镗孔前的准备工作
Requireme nt and preparati on before bori ng.
1）以挂舵臂中心位置确定支架烧焊位置，见图（1）
The support positi on should be welded accord ing to the cen ter position of the rudder born casting see fig.（1）
2）挂舵臂镗孔轴线的确定
Decide the cen terli ne of the rudder born casti ng
在挂舵臂孔处设立两个光靶如图（4）。
Set two targets on the rudder horn casting as shown on fig.（4）
采用中锤法使重锤与船台上的 Fr0肋位重合，调整光靶使
细线处于光靶的中心。
Use plumb coincide with the Fr0 location ton the berth, then adjust the target and make the wire just pass through the cen ter.
拆除重锤，安装上塞芯。在挂舵臂上用圆规划出加工圆和检验圆，并提交船东检验认可。
Remove the plumb the n set the plug and make circles mark as requirement for machine and inspection and approved by owner and surveyor.
镗排在船上的安装
Installation boring spindle on board
1）将镗排盖板用葫芦拉到挂舵臂位置，盖板图见图（2）。
Procedure for rudder horn casting boring
挂舵臂镗孔工艺
(15#16#17#73400DWT)
Take the cover of boring spindle to the rudder born casting position (cup and down) by handle crane see fig.(2) about the cover draw ing.
将镗排用滑车及手拉葫芦慢慢装入挂舵臂孔内，并在合适的位置用轴承固定，并将镗排用葫芦保险，见图(3)。
Fix boring spindle slowly into the rudder born casting hole by dilly and handle crane and support by bearing where necessary and safety by han dle crane see fug. (3).
在镗排两端近挂舵臂的两端面固定两跟划针，慢慢移动镗排，根据挂舵臂孔两端检验圆进行校核镗排，直到镗排与挂舵臂两端同心。将镗排上各调整轴承固定，拆除保险，并将传动装备烧焊所产生的应力再次拧紧，所有固定轴承的调节螺丝装上走刀箱，这样