REPORTED DEVELOPMENT OF NEW FORGE HAMMERS BY VEB SCHWERMASCHINENBAU HEINRICH RAU

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00926A008400510001-7
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 4
• Document Creation Date: December 20, 2016
• Document Release Date: January 25, 2008
• Sequence Number: 1
• Publication Date: February 1, 1956
• Content Type: REPORT

Approved For Release 2008/01/25: CIA-RDP80-00926AO08400510001-7
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~ This material contains laformattoa affectlaq the
INFORMATION REPC~~T National Defense of the ted States within the
meantnq of the Espionage aws, Title 18, V.S. C.
Secs. 793 and 794, the transmission or rwelation 25
PREPARED AND DISSEMINATED BY of which in any manner to an unauthorized per-
CENTRAL INTELLIGENCE AGENCY son is prohlblted by la
COUNTRY
DATE DISTRIBUTED
SUBJECT
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STATE ARMY NAVY
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 For precision forgings large bridge hammers with
a 5-ton falling weight and welded in all major parts
are made by VEB Schwermaschinenbau Heinrich Rau,
Wildau (Koenigs Wusterj ausen) (Fig. 1). Both columns
are cylindrically rolled and electrically welded, the
bridge consists of a sheet-iron housing in fully stress-
free welded construction. Made of cast steel and cutt-
ing right through the bridge the two tup guides extend
downward. They are fitted with cast-iron ledges and
at the top firmly joined by a sturdy : rosshead of cast
steel which contains the cast-iron working cylinder.
Despite its slender shape the cylinder is very soundly
constructed and easily capable of withstanding a
weight of blow ranging up to 10 atmospheres pres-
sure.' Working piston and piston rods are shrunk fit,
dvith the latter additionally safeguarded through being
flanged. The other rod end holding the tup is ball..
shaped and. by maanc ..t .., a . _ -I - , .
EW FORGE HAMMERS
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control mechanism and the valves are regulated from
above.
On account of its large weight the anvil block is
composed of three separate parts, the 60-ton base, the
50-ton middle section, and the 10-ton guard plate.
Technical data:
falling
fall
number of strokes
working pressure
forging height above ground
bridge clearance
height
widht
5t
1.600 him.
80 per minute
6 to 10 at.
750 mm.
2 100 mm.
4.000 mm.
weight of hammer 40 t.
Operation is by one-arm control lever arranged
on the valve-box side approximately 960 mni. above
ground. The lever-controlled operating rod for the
valves consists of two parts, one of them being con-
nected to the pressure iobricator and the other to a
limit releasing device which fully eliminates any po s-
sibility of damage as might be caused by retarded
braking of the reversing stroke. An additional safe-
guard is provided by strong conical springs fitted
beneath the crosshead on either side of the piston
rods. The hammer is equipped with a double-seat valve
'~` iMgglit of anvl `rock TI 0" -`._-_
'otal weight
The single-frame forge hammer with 750 kg. lop-
ping weight (Fig. 2) is steam- or air-operated and has
a portable anvil block thus considerably reducing the
strain on the hammer structure.
It is suitable for hammer or precision forging and
fitted with a combined hand and automatic control.
The frame is mounted on a cast steel base-plate
which is broken through by the anvil block carrying
the anvil head with lower inset. These latter are se-
cured by dovetail guides.
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~i 4: Single-frame Hammer (foreground) and Bridge
being mounted
counterblows at equal speed. With the elimination of
the anvil bloc!c a much lower total weight is obtained
which in turn affects favourably the hammer bed.
Actually only 1.'5th of the bed normally required for
anvil-block type:; s needed for the swaging hammer.
this resulting ;r; a notable lessening of vibrations
which are such a troublesome feature of drop ham-
mers and damaging to building parts exposed to them.
However the major advantage of the swaging
hammer compared with anvil-block types is its
greater economy, as anvil-block losses are ruled out
even with heaviest blows. Power economy amounts
to a maximum of 400 o. At medium working pressure
between 6 and 8 atmospheres absolute pressure these
swaging hammers are suitable both for compressed-
air and for steam drive:
Technical data:
Type
specific energy of
G 10 G20 G32 G40
blow mkg. 10,000 20,000 32,000 40,000
fall of one tup mm. 500 600 670 710
clearance between
guides mm. 750 940 1,080 1,180
max. width mm. 3,600 3,870 4,400 4.500
max. depth mm. 3,300 3,200 4,100 4,200
height approx. mm. 5,600 7,385 8,520 8,520
height above floor
approx. mm. 4,000 5,550 6,300 6,300
h
ammer weight
approx.t. 75 115
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l srh:,ngeabie Vee-guides for !up and working
cviunder a iv fit1eel to the frame. The upper cylinder
p with built-in conical spring serving as stop-block
;lh,w gentlc braking of the piston in its upward
n~~ vement.
Top and piston together with piston rod are
forged integral, with the upper inset joined to the tup
in n-rmal dovetail fashion. The valve box is attached
sideways to the ( nder and contains in the upper
c:q, thf, slide controlling the hammer between zero
:,uc m