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[技术] 模型蒸汽轮机制作(转)

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 楼主| 发表于 2018-4-25 12:55:14 | 显示全部楼层
A squared block is placed in the lathe and aligned with the pump center...

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

First the big drill bits, then boring. Here is a trick if you don't keep your boring bars all in holders. Use a regular tool that is known to be set correctly to center to mark the workpiece...

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Now line up your bar on that mark. Clever!
 楼主| 发表于 2018-4-25 12:55:38 | 显示全部楼层

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Rotor assembly fits just right after boring. Note the balancing holes on that rotor.

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Nozzle holes are 1/8" followed by a 3/16" endmill to countersink an area for the connector to seat in. Next is the dividing head work. The face marked "top" was aligned along the rotational axis with a machinists square. The dial indicator is swept to be sure the axis is parallel to the mill's X-axis...
 楼主| 发表于 2018-4-25 12:55:58 | 显示全部楼层

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Now the mill is lined up on the original holes, the table is moved 3/8", and the head is rotated 20 degrees to achieve the correct tangential angle for the inlet port....

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Here are the exhaust ports, which are much larger than the inlets to keep back pressure down...
 楼主| 发表于 2018-4-25 12:56:17 | 显示全部楼层

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Next up are the endcaps. The housing is scribed to the endcap material and then a circle is drawn around with a dividers...

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

The endcaps are trimmed close to the outline on the bandsaw to save too much interrupted cutting on the lathe...
 楼主| 发表于 2018-4-25 12:56:38 | 显示全部楼层

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Watch this interesting trick to secure the workpiece. First, masking tape on the back side of the workpieces provides some friction with the chuck. Put a piece of stock in the jaws large enough so that when the jaws are tightened on it they are slightly smaller than the OD of the workpiece...

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Now trap the workpiece against the chuck with a live center and you're ready to go! This is another reason Bog avoided a nasty interrupted cut: that masking tape only provides so much friction!
 楼主| 发表于 2018-4-25 12:56:56 | 显示全部楼层

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

End pieces are close. About 1/8" too thick. Next up is machining the bearing pockets. This is done with softjaws on the 4-jaw chuck (this one is self-centering, an independent jaw wouldn't need the soft jaws) to make it as accurate as possible.

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Bearing fit is good, so the workpiece is flipped and now a spigot is turned that will be a "wringing" fit to the bore...
 楼主| 发表于 2018-4-25 12:57:17 | 显示全部楼层

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

The wringing fit is good and things are starting to take shape...

模型蒸汽轮机制作

模型蒸汽轮机制作


模型蒸汽轮机制作

模型蒸汽轮机制作


Next step are the bearing caps. Round insert tool makes a pretty radius...
 楼主| 发表于 2018-4-25 12:57:37 | 显示全部楼层

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Parted off and you can see how they look...

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

They need to be the same thickness, so the difference is measured on the surface plate...
 楼主| 发表于 2018-4-25 12:57:57 | 显示全部楼层

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

And they're faced off in the collet chuck...

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Bearing pockets cut...
 楼主| 发表于 2018-4-25 12:58:14 | 显示全部楼层

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

Trial fit looks good. Here is the hardware to mount the end caps and bearing caps...

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

模型蒸汽轮机制作

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