尾轴镗孔工艺

1. 镗孔前的要求及准备工作

Requirement and preparation before boring.

1）孔的中心线己确定并提交船东船检认可，同时尾部的所有振动工作应停止。

Center line confirmed and approved by owner and inspector, and stop all

vibration at after.

2）检查在尾轴孔端面的加工圆及检验圆是否己标记。

Check marked for machining circle and check circle at stern tube.

3) 检查尾管铸件是否符合图纸尺寸要求，确认后方可塞镗排进行镗孔。

Check the size of stern tube casting, ensure the size as same as the size

of shaft arrangement drawing , after being confirmed, take the boring

spindle into stern tube

2. 镗排在船上的安装

Installation boring spindle on board.

1）将专用镗排用滑车及手拉葫芦慢慢装入尾轴孔内并在适当的位置用专用轴承支承。（见图①）

Fix special boring spindle slowly into stern tube by tackle and hand gourd

and support by special bearing where necessary (See fig. ①).

2）在镗排的两端近尾轴孔的两端面固定两根划针，（见图①所示）慢慢转动镗杆根据尾轴孔两端的检验圆进行校核镗杆，直至镗杆与尾管两端的检验圆

同心，将镗孔上各调整轴承固定并将传动装置安装到位，这样可以开始进

行尾轴孔的切削。

Fix two needle at boring spindle both ends near stern tube both ends

(showed in fig. ①), slowly rotate boring spindle according to stern tube

both ends check circle until boring spindle is concentric with check circle

at stern tube both ends, fix adjustment bearing on boring hole and install

power unit, so can begin stern tube hole cutting.

3. 尾管的镗孔

Boring for stern tube

1）根据图纸要求见尾轴尾管总图加工达到图纸的要求，见图②，镗孔必须分粗镗和精镗两阶级，粗加工后须要据检验圆校核镗杆位置有无移动，经检

验无误或经调整后方可进行精镗，具体的加工切削用量如下表。

According to drawing requirement seeing stern tube general drawing，

see fig. ②, boring must be divided into two stages of heavy boring and

finally boring, must check whether boring spindle position is moved as

check circle after rough machining, finally boring can be carry out after

having checked right or adjusted, actual machining cutting value as

follows table.

为了避免因温度的变化而引起的尾管变形，尾管的精镗最后刀应在阴雨天

或夜间一次连续完成,最后一刀的走刀方向最好与轴承压入的方向一致。

To avoid stern tube’s deformation due to temperature alternate, last feed

of stern tube finally boring should finish continuously at a time in cloudy

rainy day or at night, last feed cutting direction accord with that of

bearing press-in best.

2）尾轴孔加工完毕后经检验合格后，然后加工两面端面。

Finish stern tube hole and check carry out, then machining two ends

surface.

4. 镗孔质量的检验及要求

Check and requirement for boring quality

1）镗削后的孔的同轴度的检验，在镗杆的两端安装两只百分表（见图③），慢慢转动镗杆确保不同轴度不超过0.1mm.

check hole coaxiality after boring, mount two dial gauge at the both ends

of boring spindle (see fig ③), and slowly turn boring spindle to ensure no

coaxiality not exceeding 0.1mm.

2）尾管孔表面的检验，可采用专用工具对加工表面检测，对于与轴承配合的表面的粗糙度控制在3.2um以内，对于非配合表面粗糙度控制在12.5um

以内。

Check stern tube hole surface, can adopt special tool to check finish

surface, roughness for surface fit with bearing should be within 3.2um,

and roughness for no fit surface should be within 12.5um.