ABB IRB 6620, Технические характеристики товара

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2 DressPack and SpotPack
2.7.1 Introduction
98 Rev.E 3HAC 025861-001
Water return circuit
The water return circuit monitors the flow of the returning cooling water from the
Spot welding gun (see Figure 63). The flow switch detects if the water flow is too
low in the cooling water circuit.
The flow switch gives a digital signal to the robot control system, which
automatically shuts off the electrical shut off valve in the water in circuit if the flow
is too low.
The system and the supply of cooling water are then automatically stopped to
minimize risk of damage to the system.
The water return circuit is delivered with a pre-set flow limit, set to 8 liters per minute
at 0.2 MPa water pressure.
The water return circuit begins from right with a Parker Pushlock adapter (suitable
for a Parker Pushlock DIN 20 078 A, we recommend a
Parker Pushlock 39C82-15-8BK fitting).
It is also equipped with a flow control valve; the flow control can adjust the water
flow to the desired flow level. The flow rate can be monitored by the scale on the
flow control valve. The scale can be rotated so that easy reading can be performed.
This will serve as a rough function check in the flow range between 1 to 8 litres per
minute.
The flow control valve is when delivered adjusted for maximum flow.
The circuit ends with a check-valve that will stop any reversing water flow and ends
with an internal G ½" thread. From this point the water is led to the factory water
system.
Figure 63 Water return circuit.