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[技术] 迷你车床车间(转帖)

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发表于 2014-9-16 05:54:04 | 显示全部楼层 |阅读模式
迷你车床车间(转帖)
业余的车间工具
本帖包含的微型/小型车床,小铣床的有用工具。
我一直着迷的金属加工机械

高度尺切削工具
这是我开始我的后提出的第一个工具加工的努力于1998年,是简单的构造。
该设计的一个重要方面是具有平行于工具头的测量臂。  
黄铜是用来使基和测量臂。

迷你车床

迷你车床

@
下面,另一个高度计的设计介绍。这样的设计本质上是崎岖的,没有任何的调整,并且是精密加工,以满足您的车床。  

迷你车床

迷你车床

 楼主| 发表于 2014-9-16 06:05:09 | 显示全部楼层
DIE HOLDER
One of my first metalworking projects was making die holders for threading on the lathe. This project suited me very well at the time and provided the opportunity to gain experience  using the lathe.  I produced my own tooling for threading, one of the basic tasks of metalworking.
Two die holders are shown below.  The holders accommodate dies of 20 and 25 mm diameter.  The dies are the round, split, adjustable type, that are adjusted prior to insertion in the holder by means of a screw in the die. The outer surface of the die includes two "dimples" for securing them in the holder.
I was pleased with the performance of  the first two die holders, and eventually made a set of seven, one for each of my dies.
A through-hole is included in the holder that has a diameter  equal to the size of the maximum diameter of the die.  One end of a rod fits into this hole while the other end is gripped by a chuck that is positioned in the lathe tailstock.  It is recommended that the rod material be 12 mm diameter.
IMPORTANT NOTICE  
Threading is done manually. Do NOT power the lathe.
Threading is accomplished as shown in the below photos  -
A  die is installed in the holder which is mounted in the lathe.
A Manual Mandrel Handel (See Article Number 13.) is inserted in the bore of the lathe spindle (opposite the chuck) to provide for manual turning of the chuck and workpiece while threading.
The tailstock  ram  is used to bring the die into contact with the workpiece at the start of threading.   Threading then progresses as the Manual Mandrel is turned manually, while the handle of the die holder is held steady.  

迷你车床

迷你车床

迷你车床

迷你车床

迷你车床

迷你车床

 楼主| 发表于 2014-9-16 06:06:09 | 显示全部楼层
BRASS HAMMER
 
One of my first metalworking projects was making a brass hammer that has proven  useful over the years.   Using brass for the head helps prevent damage to the work.  
When I first assembled the  head to the handle, it was not properly aligned.  This was one of my first exposures to problems that can arise during metalworking.
The overall length of the hammer is about 150 mm.     

迷你车床

迷你车床

 楼主| 发表于 2014-9-16 06:06:55 | 显示全部楼层
Scissors Type  Knurler
 
Shown below  is a scissors type knurler that mounts directly in the four-position toolpost that came with my lathe.  The scissors type knurler is chosen for knurling on smaller lathes because the sizable forces associated with knurling are mostly confined to the knurler itself.
After making this knurler I found that there were lessons to be learned in using it.  It was comparatively easy to knurl an almost perfect pattern into aluminum and brass, but much more difficult to achieve a pleasing pattern on mild steel.  It was difficult with this knurler to produce the high forces necessary for knurling harder materials.
Knurling wheels are commercially available in diamond and straight patterns. These patterns are availabe in fine, medium and coarse grades.
 

迷你车床

迷你车床

迷你车床

迷你车床

迷你车床

迷你车床

 
Attached it on the lathe.

迷你车床

迷你车床

 楼主| 发表于 2014-9-16 06:07:23 | 显示全部楼层
GRINDING REST
 This project adds a tool rest to my bench grinder for accurately grinding  lathe and milling tools.  For example, a 60 degree point, with proper relief angles, can be accurately ground using this rest.
The tool rest consists of a slotted base  which  can be tilted at various angles. This base can also be moved in and out, and up and down, relative to the grinding wheel.  The slotted base includes two slots; the side-to-side slot shown below, and an in-out slot, shown in a later photograph.
This design does not include an angle scale, so I use a bevel-square to set up the vertical and horizontal angles.
I have found this design a very useful addition to my shop; however, there have been times when the handles have caused interference.  The handles offer a convenient method for tightening, but perhaps ordinary fasteners would serve nicely.  
The sliding base travels in grooves and includes a guide which can be rotated to set a grinding angle.  

迷你车床

迷你车床

迷你车床

迷你车床

迷你车床

迷你车床

 楼主| 发表于 2014-9-16 06:07:47 | 显示全部楼层
Below shows the slots incorporated in the base.

迷你车床

迷你车床

Below shows a lathe bit positioned on the rest, ready for sharpening.  During sharpening  the bit is held against the fence by hand.

迷你车床

迷你车床

 楼主| 发表于 2014-9-16 06:08:16 | 显示全部楼层
SCRIBING BLOCK
This is a useful scribing block with an adjustment mechanism of the needle point height.
This design came from a famous Japanese mini-lathe technical guidebook. It incorporates both coarse and fine  adjustments which makes it convenient to use.
The overall height is about 12 cm which is adequate for my work.  

迷你车床

迷你车床

迷你车床

迷你车床

Put needle cap, made of silicon rubber pipe, when it is out of use.
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For safety, protective tubing is placed over needle when not in use.

迷你车床

迷你车床

 楼主| 发表于 2014-9-16 06:08:46 | 显示全部楼层
PARALLEL CLAMP
This design is found in many machinist's books and is readily made in the home shop.  
The jaws were made from 12 mm square mild steel. The screws were made from stainless steel because it was on hand.
These clamps have a good feel when tightened and have good gripping force.  As shown in the photograph, a cross-hole is provided for extra tightening with a bar.  This can lead to over-tightening and slight bending of the jaws.  
 

迷你车床

迷你车床

 楼主| 发表于 2014-9-16 06:09:10 | 显示全部楼层
FILING REST
After machining it is sometimes useful to file the workpiece while it is held in the lathe. This can be accomplished using the "free-hand" method or by using a guide.
The below photographs show a guide that I made which provides more precision than the free-hand method.  The guide is positioned in the cross-slide and includes an up/down adjustment, useful for accurate setting of the depth of filing. The file itself rests on rollers which include shoulders to protect against the file contacting the jaws of the chuck.

迷你车床

迷你车床

迷你车床

迷你车床

迷你车床

迷你车床

 楼主| 发表于 2014-9-16 06:09:41 | 显示全部楼层
TOOL HOLDER
I made holders  to adapt certain tools to the four-position tool post that came with my lathe. A parting tool holder is one example.  
The below photograph shows a holder for a parting tool, held in place by an outer plate.   The material is mild steel.

迷你车床

迷你车床

Below shows the results  of over-tightening the cover plates.

迷你车床

迷你车床

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