Correa a 20/25 milling machine 1

Correa a 20/35 milling machine 
That an internatïonally oriented Spanish manufacturer offers a wíde Numerically Controlled bed type milling machine range, reflectíng the Company s constant marketíng policy by including all those elements to the machine which ensure its good and durable operation.
Thus, elements such as recirculating ball leadscrews or hydraulic clamping system of well recognized improved performance are standard on the machine.
This is just a token of a number of features which should not be left out these days even
if the customer does not deem them necessary.
CORREA model A-20/35 bed type milling machine, standard version, with 3 independent
feed motors non simultaneously feeding axes and universal milling head.
CORREA Model A-20/35 bed type millíng machine equipped with a 2-axes XY, Z, YZ
contouring unít, make Heidenhain TNC-145, and featuríng a twin spindle milling head with built-in hydraulic tool clamping.
CORREA Model A-20/25 bed type millíng machine equipped with a full contouring
CNC control unit model SINUMERIK 6M6 and featuríng an automatíc tool changer and a
twin spindle head with built-in hydraulic tool clamping.
CORREA Model A-20/25 bed type míllíng machine equipped wíth a poínt to poínt
positioning control, make Heidenhain TNC-131 and fitted with a hydraulically operated
horizontal milling attachment.
STANDARD EQUIPMENT
Complete electrical equipment and motors. Coolant equipment. Cutter arbor. Service and spare parts manual.

TECHNICAL MACHINES 
FEATURES
Speed Box gears and shafts of carburized, hardened and ground molybdenum-chrome steel. Spíral spur gear driven spindle to eliminate vibratíons. Electromagnetic main spindle brake. Hydraulic speed change. The longitudinal, vertical and cross slideways feature steel band ínserts hardened to 60 Rc. Automatic slideway lubrícation via oil flow metering units located at the lubricatíon points. 3 independent feed motors controlled
by a single servo driver non simultaneously feeding axes . Longìtudínal, cross and vertical ball leadscrews, the latter being hydraulícally counterbalanced. 3-axis hydraulic clamping system. Complete machine operation from the pendant panel. 3-axís switchable hand pulse generator located in the pendant panel. Main spindle with a twist-on type tool-holder. Precisíon scales on all three movements. Except when the machine is equipped
wíth dígítal read-out or positíoning control .

1 lnternal view of the spindle speed box.
2 Rear view showing the box type column unit where the overarm carrier slides vertically on double supports at the front and the rear.
3 Detail of the ínserted hardened and ground steel bands on the longitudinal axis and the table recirculating ball leadscrew mounting.
4 Detail of the hydraulic counterbalance of the overarm carrier.
UNIVERSAL MILLING HEAD
Varíous working ranges available on the machine dependent on the milling head used.
1 Model U universal milling head with mechanical tool clamping device.
2 Model V vertical milling head with mechanical tool clampíng device.
3 Model VC vertical milling head with quill featuring three automatic downfeed rates 
0,125 and 0,250 mm. peг spindle revolution with mechanical tool clamping device.
4 Model DM twin spindle head with built-in hydraulic tool clamping devíce.
The milling heads marked are available, upon demand, with a built-in hydraulic tool
clampíng devíce.
1 Universal-Fräškopf, Modell U ;  
21 Vertikal-Fräskopf, Modell V ; 
31 Vertikal-Fräskopf mit Pino Modell VC ; mit 3 automatischen Pino nvorschuben 0, 063,
0,125 und 0,250 mm/U. ,  
 Automatic tool
2 Model U universal milling head with built-in hydraulic tool clamping device.
3 Hand pulse generators. Horizontal míllíng devíce wíth or hydraulic clamping. Hydraulic tool clamping device. Main spíndle 18 Kw. drive. Automatíc shuttle pendulum cycle. Automatíc box square cycle. Automatic cubic cycle. Posítíoning control on three axes. Numerícal control Automatíc tool changer. Dígítal readouts. Dívíding heads. Rotary tables. Mechanícal and hydraulíc víses. Power drawbar. Cutter arbors. Collet holders and collets. 
1 Milling of a multiple cross joint used in the industry, performed on CORREA mod. A-20/25 with CNC control unit.
2 Spíral míllíng on a stabílizer słıaft used in the oíi drílling índustry, performed on CORREA mod. A-20/25 equippéd with a special heavy duty dividing head.
3 Mílling, drilling and tapping of díesel engine heads, performed on CORREA mod. A-20/25 with Heidenhain TNC-131 and two automatic rotary tables.
4 Milling of a bed castíng performed on CORREA mod. A-20/35 with CNC control SINU-
MERIK