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General description and
specifications
The machine consist essentially of of
hydraulic jack with cylindrical mandrel-stem, mounted horizontally within
a strong steel frame which also carries two fixe reaction rollers.
Two 100 mm dia. rollers are supplied; mandrels and mandrel holders must be ordered separately. The type of bending required depends on the diameter of the specimen and on the quality and type of steel, as specified in Table II.
This table also indicates the diameters required for the bending mandrel and rollers, which can easily be changed for different sizes, and for the roller spacing which is adjustable.
Mandrels larger than 96 mm dia. do not need mandrel holders, because they fit directly onto the stem.
Power: 750W
Dimensions:
1500x665x1050 mm
Weight approx.: Net 210 kg
Application
Used for bending
and staightening steel reinforcing bars. Two types of test can be
performed depending upon size and quality of specimens: 1) Bending the
specimen through 90° and than straightening it again; 2) Bending through
180°.
Standards
ASTM A 615-89, ASTM A
615M-89,
Law N° 1086 March 1992
| MANDRELS | Standards | |
| Table I | Italian | ASTM |
| for rounds dia. 5 to 32 | for rounds dia. 9.52 to 35.81 | |
| Cat. no. | mm | mm |
| 70-C977/15 | 20 | -- |
| 70-C977/16 | 24 | -- |
| 70-C977/19 | 32 | 32 |
| 70-C977/21 | 40 | 40 |
| 70-C977/23 | -- | 44 |
| 70-C977/24 | 48 | -- |
| 70-C977/27 | -- | 56 |
| 70-C977/33 | -- | 96 |
| 70-C977/37 | 112 | 112 |
| 70-C977/38 | -- | 125 |
| 70-C977/39 | 128 | 128 |
| 70-C977/42 | 144 | -- |
| 70-C977/47 | 200 | 200 |
| 70-C977/48 | 220 | -- |
| 70-C977/49 | -- | 224 |
| 70-C977/50 | 250 | 250 |
| 70-C977/55 | 336 | -- |
| 70-C977/56 | 384 | -- |
| 70-C977/57 | -- | 210 |
Important Note: over 96 mm dia., the mandrels are directly connected to the jack-stem.
| MANDRELS Table II | |||
| Specimen
dia. mm |
Mandrel
dia. mm |
Roller dia.
mm |
Distance between rollers mm |
| deformed surface | deformed surface | ||
| FeD 44K |
FeB 44K | ||
| 5 | 20 | 50 | 35 |
| 6 | 24 | 50 | 42 |
| 8 | 32 | 50 | 56 |
| 10 | 40 | 50 | 70 |
| 12 | 48 | 100 | 84 |
| 14 | 112 | 100 | 154 |
| 16 | 128 | 100 | 176 |
| 18 | 144 | 100 | 198 |
| 20 | 200 | 100 | 260 |
| 22 | 220 | 100 | 286 |
| 25 | 250 | 100 | 325 |
| 28 | 336 | 100 | 420 |
| 32 | 384 | 100 | 480 |
Note:
The specimens marked in red must be bent to
180°, while those marked in blue must be bent to 90° then straightened for
minimum 20°.
ASTM specifications require 100 mm dia. rollers only and
the straightening test is not required.
| CAT. NO. | DESCRIPTION |
| 70-C977............... | Cold bend testing machine 12 t cap.; 220V, 50 Hz, 1 ph. |
| 70-C977/Z........... | Cold bend testing machiine 12 t cap.; 110V, 60Hz, 1 ph. |
| Accessories | |
| Mandrels | All available mandrels are listed in Table I |
| 70-C977/60......... | Mandrel holder for mandrels to 20 mm dia. |
| 70-C977/61......... | Mandrel holder for mandrels from 24 to 50 mm dia. |
| 70-C977/62......... | Mandrel holder for mandrels from 54 to 96 mm dia. |
| 70-C977/K1........ | Recommended set of spares comprising jack sealing, switch, pilot lamp and pressure gauge 0-16 tons cap. |
| 70-C977/R22....... | 100 mm dia. roller |