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作品名  目盛り付けツールと結果
制作者  JIM WHETREN さん (イギリスからです)
日 付  2006/7/8
メール  
URL  

1.このツールは、'The Model Engineer's Workshop Manual' p.177.George H Thomas)に掲載されていたものの簡易バージョンです。 ツールポストに取り付けて、平面や色々な状況で目盛りを彫ることができます。

The tool is a simplified version of the one used by the late George H Thomas in his book 'The Model Engineer's Workshop Manual' p.177.
 The numbers are arranged so there is only one click either side of the one lines. Operating the tool lever with the right hand and turning the chuck with the left hand, scales can be made very quickly and accurately. This takes longer to describe than to actually do!
 2.上部からの様子です。ストッパーと思われる、バーが見えます。

The numbers are arranged so there is only one click either side of the one lines. Operating the tool lever with the right hand and turning the chuck with the left hand, scales can be made very quickly and accurately. This takes longer to describe than to actually do!

 3.ラインの長さを設定するのか、単なる表示なのかは不明ですが、ライン描きのストロークと連動しているように思います。
  The grub screw at the zero position on the index turret holds a spring loaded ball which clicks into a dimple on the top of the body, locating it positively.
    The tool tip is brought to touch the start of the line at the zero position and the stop set.
    The turret is rotated to the 10 click and a long ten line, about 0.05mm deep is cut.
    The turret is rotated to the 1 click and four one lines are cut.
    the turret is rotated to the 5 click and a five line is cut, then back to the 1 click for another four one lines.
  There are holes in the turret at the three number positions, of a suitable depth to suit the varying line lengths which the stop drops into.
4.この治具で製作されたダイヤルです。目盛りの深さが一定で、分割も一定です。 目盛りを刻んでから、数字を刻印しています。

After the finishing cut is taken on the dial, the tool is then used, as the lines will be a constant depth, the rotation being concentric. when all the lines are cut and the numbers stamped, a final skim can be taken to remove any burrs, leaving an even surface.
5.ダイヤル例です。
6.ダイヤル例です
7.割り出しは、写真のようにギアを使用することで行っています。刃は、ハクソーの折れ刃を使用しています。

The line positions are indexed with a gear wheel engaging a ratchet made from a piece of hacksaw blade. The chuck is rotated by hand until a 'click' is heard, then it is rotated back against the ratchet to remove any backlash. This is very quick.
8.拡大写真です。

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