Hollow Wire Machine
FUNCTIONS AND PARTS OF THE HOLLOW WIRE MACHINE
Hollow wire machine was planned and built to carry out two slots (an upper and a lower one) on tombac (supplied in skeins). In the next phase a metal (gold or another alloy) plate will be wound up around the tombac and will be folded into the upper slot and the welding wire will be inserted into the lower one. During the output phase a wire-drawing machine with rolls will form the tube according to a square section so as to facilitate the next rolling procedures. The milling cutters are widia ones. This machine consists of a box-like metal bench housing, in its upper part, the groups of driving, straightening and wire-drawing rolls. The adjustable speed motors for milling and driving are located on both sides of the machine.
The control switchboard panel is located on the upper part of the machine.
Hollow wire machine was planned and built to carry out two slots (an upper and a lower one) on tombac (supplied in skeins). In the next phase a metal (gold or another alloy) plate will be wound up around the tombac and will be folded into the upper slot and the welding wire will be inserted into the lower one. During the output phase a wire-drawing machine with rolls will form the tube according to a square section so as to facilitate the next rolling procedures. The milling cutters are widia ones. This machine consists of a box-like metal bench housing, in its upper part, the groups of driving, straightening and wire-drawing rolls. The adjustable speed motors for milling and driving are located on both sides of the machine.
The control switchboard panel is located on the upper part of the machine.
MAIN SECTION OF THE HOLLOW WIRE MACHINE
- WIRE-STRAIGHTENING UNIT
This unit is designed to straighten metal wire which is normally unwinded out of skeins and therefore it is not perfectly straight.
- THRUST-ROLLS UNIT
This unit consists of a pair of motor-driven rolls thrusting the wire. The distance between the two rolls, and therefore the pressure they exert on the wire, can be manually adjusted.
- MILLING UNIT
This group is made up of nr.2 widia milling cutters (one on top of the other) able to produce grooved profiles on the metal wire.
The milling-cutting unit works under cooling liquid which is sprayed through nozzles by means of a special pump.
The milling-cutting unit works under cooling liquid which is sprayed through nozzles by means of a special pump.
- PULLING-ROLLS UNIT
This unit consists of a pair of motor-driven rolls pulling the wire away from the milling-cutting unit. This unit is furthermore equipped with compressed-air-driven nozzles which make it possible, at the outlet of the milling cutter, to clean the wire from possible metal particles and to dry it eliminating any trace of cooling liquid.
- Unit referring to the first phase of tube-winding procedure
The following functions are performed by means of this unit:
- insertion of the metal plate
- driving function and forming of tongues on the plate to allow the folding of it onto the grooves of the profile.
- Insertion of a weld-sealed wire into the special groove of the profile
- Unit referring to the second phase of tube-winding procedure
The following functions are performed by means of this unit:
- pulling
- and forming
- and winding of the metal plate around the profile.
- Unit referring to the THIRD phase of tube-winding procedure
This unit performs the functions of folding of the plate onto the profile.
TECHNICAL FEATURES OF THE HOLLOW WIRE MACHINE
OVERALL DIMENSIONS 1400 x 800 x 1440 (h) mm
TARE WEIGHT OF THE MACHINE 450 kg ca.
POWER SUPPLY 380V – 50Hz
TOTAL POWER 4 kW
FORWARD-FEED MOTOR 0.37 kW
MOTOR FOR THE MILLING CUTTER 1.50 Kw
MOTOR OF THE COOLING PUMP 0.09 kW
DIAMETER OF THE WIRE WHICH CAN BE USED From 5 up to 8 mm
SPEED OF THE MILLING-CUTTING PROCEDURE Can be adjusted by means of an adjustable-speed motor
FORWARD-FEED SPEED Can be adjusted by means of an adjustable-speed motor
COMPRESSED-AIR PRESSURE Advisable: 6 Bar
NOISE LEVELS AT THE WORK STATION Lp = 82 dB(A)
