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Manufacturing of laths of an octahedral profile


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The requirement for giving to laths of an octahedral profile arises at manufacturing yards models. There are many ways of the decision of this question (by means of a plane, a file, the milling machine tool and etc.), different labor input and accuracy of the manufacturing, everyone modeller chooses a way with reference to available possibilities. I have solved this question by means of the drum-type grinding machine tool  http://modelshipworld.com/index.php?/topic/1521-the-drum-type-grinding-machin/  and an overlay on a desktop in the form of an oak lath with a V-shaped longitudinal groove (groove surfaces form a corner 90 hailstones.) Into which square preparation is inserted, and then its corners are ground before formation of sides of the demanded width. Polishing is conducted on layers: the layer of the set thickness consistently from each corner of preparation, then the following layer and so on acts in film. Formed after removal of each layer of a side have almost identical width (to within 0,1-0,2 mm) on all length of preparation, process of increase in width of sides is well and precisely enough operated and supervised, than this way and has involved me. The surface of new sides needs only small finishing polishing, except that, the received profile facilitates and accelerates process of manufacturing of round parts of a yard.

More low this technology is shown on an example of manufacturing of a for-marsa-yard of model Montanes (nominal diameter of 6 mm, length of 310 mm, the yard middle has an octahedral profile in length of 80 mm)   http://modelshipworld.com/index.php?/topic/82-montanes-by-garward-occre/page-40

The oak lath before groove manufacturing is ground for giving of parallelism to sides, the groove is executed on milling cutter MF 70 finger-type mill with a V-shaped profile (from set Proxxon), preparation from a pear section 6,5х6,5 mm in length of 400 mm, grinding paper SIA P 120. Manufacturing of four additional sides on all length of preparation has occupied about 20 minutes

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Edited by Garward
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This is a good idea that has been around for a long time. I recall reading Clay Feldman's work on his Armed Virginia Sloop back in the early 90s. He used this idea to make his mast and spars from square stock. He used a hand plane and a slightly deeper groove.

 

Russ

Edited by russ
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This is a good idea that has been around for a long time. I recall reading Clay Feldman's work on his Armed Virginia Sloop back in the early 90s. He used this idea to make his mast and spars from square stock. He used a hand plane and a slightly deeper groove.

 

Russ

 

Yes, it is known idea, ways of its realization - different degree of labor input and accuracy of the received results differ only.

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очень хорошо

 

 very nice idea, why i do not have it??

 

Robert, any problems, all adaptation - a piece of a piece of wood with a flute! :)   It isn't obligatory to grind by means of the drum-type grinding machin, it is possible to use a surface gage of Proxxon DH 40 or the similar machine.

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