USE OF MAGNETIC SLABS FOR BRACING PARTS BEING FINISHED ON A MILLING MACHINE

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000600260391-9
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 2
• Document Creation Date: December 22, 2016
• Document Release Date: August 4, 2011
• Sequence Number: 391
• Publication Date: November 1, 1949
• Content Type: REPORT

Sanitized Copy Approved for Release 2011/09/13 :CIA-RDP80-00809A000600260391-9
COUNTRY
SUBJECT
N04Y
PUBLISHED
1MHERE
PUBLISHED
DATE
PUBLISHED
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IiVFOR~IATION FROWI
CLASSIFICATION CO>41~1DEd3TIAL ~~~~~~~~~~
CENTRAL IN'lELL!GENCE AGENCY REPOR
Technological - Machino Toole,
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requested.
D6S ~ IeAGlbTIC SLABS FOR BRACLT9G PARTS
HR-iG FIEIBH? OII. A~ ?!'?-?'-' ~ IHt7F38E
Until now, in the USER and abroad magnetic slabs f'or bracing parts being
finYnhed were used r,~?1 yalishing mmchinee and, in rare cases, an turning lathes
gaff p],arars. TheF crew not, hokever, used for. this purpose on milling mnaLiaae.
The usual ob~ectione against them had been ae folloxe:
1. The strength of the msgnstic field was not Pafficiert to bald the parts
during milling.
2. Tin?i >ra~etic field would affect th9 miller, spindle, and other parts of
the maohiae.
}~ :.1'y rig:.t bo attracted to t ha cutting eCga N:ati c:.asaY~.az1;; t:.B tool
XC111d IIet Citt Jet81.
That author cf this article hoe prcaed tha?: those ob,~,erti?us are grorndlase.
After ilntroduoiag hie snggrstioa in ea assembly machine chap engaged in unit pro-
ducticn of ,internal carbne*.ion engines, the author made use of n mngnvtic e:eb
Alreal~ in the shop, 1,500 z 450 millimeters iII size, and nn idle 1~-lrfnce gi'113d-
ing snohine, placing it on the table of a Zbroyff'to vertionl milling machiao.
Bor the direct current supplied to the magnetic slab, the author used a
shop generator o: 380 volts AC and n125-volt dynamo. To the slab fncoe, cut-
ting edges about 50 m1111matere high ware attached with iron etY~ipe.
For a sirpler method of holding the fine parts on the rlenr Blab, lo~gtbw!ee
and croeeviee etrlps must be set up. These strips are not needed fa: large pstg.
- 1 - M.~r??:1T1l1~
~t~1~rC i~1~C+'j 1 IMF
COZII'IDEFTIIIL
Sanitized Copy Approved for Release 2011/09/13 :CIA-RDP80-00809A000600260391-9
DATE OF
INFORMATION
DATE DIST. ~ I~lO
1g43
V 1
N0. OF PAGES
2
SUPPLEMENT TO
REPORT .JO.
THIS iS UNEVALUATED INFORMATION
 Sanitized Copy Approved for Release 2011/09/13: CIA-RDP80-00809A000600260391-9
"i?he number of parts whlch can be finished eimulteneouely depends on the
thiaknees of the slab. T~i.~~1f:Ge~ence betveesa the size of eemlfiniahed parts
or parts which have had a preliaiiaery i'iaiah should not eaceed ~G 0.5 millimeters
iciic Sias parts sad ~ 1 nilllimeter for large pt+rte. A greater differeaoa produces
~ezl~e at the beginning of mi17.1ng and displaces the parts on the slab. if aimul-
ttuieous fiaibhiag 1e absolutely necessary, i~ng aemiliniehed putts ehaulQ be
grouped nt the edges of the elnb and fine ones in the middle.
Ta eonductiag hie fixet ezpeximente, the nutaor used n m111er 13d m1111-
metere in dlnmeter to n'i11 the parts with n cutting velocity of 49 maters per
minute at the b~ginuing and end of milling.
At present, for an average range of parts, the cutting velocity has been
increased to 113 metexa per minute and the war? 1e done by ea aaaembiy miller
300 millimeters is dimm~ter. The delivery per minute is 12 .millimeters per
minute for the starting anfl finishing reng~, and 18 millimeters per minute for
the m_ddlo range.
Ruch ea obviously low cutting schedule moat be ezplained by the absence of
tool ecoaotsy Sn the plant mentioned end the neoeasity for increeein~ the dur-
abllity of the miller to the detriment of production of f+.niahing work.
i~ihen tha work ie finished, the slab mast be carefully cleaned of chips and.
the liquid must be caoleQ. Zt is adviesble that the eemifiniehed parts ahoul4
be clean; that Se, 1t ahou3.d be aithaat akin, casting Garth, otc.
,liter otaokiag up the parts and connecting the aagoetic slab, it ie recom~
mended t0 prase the parts being finished to the slab surface by n tap of a aon-
ferrove hmmaer.
In the nuthor'o opinion, the ezperimente onducted demonetrnte the posoa-
bility of introducing megn!!tic slabs to hraoe par+,e which are to be milled.
i1t seams opportenle to bring up the question of annufncturing nngnetlc elnbe
and plates for Arneiag parts supplying them for milling machines on the enure
bnsiu as othe. ordinary aocaeeories.
[fie photograph sad one eohematic dingrnm of the machine aro omitted but
are n~ailabte in the original ~ocumeat in CIA
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CCAP'IDS1iTIAx.
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tiC~itlFi~t~~ IIA4
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