> The resistance spot welding is one kind mainly
uses in the thin steel plate connection manufacture craft, widely
applies to industry sector and so on automobile manufacture and
aviation. First mainly completed since 1933 by the spot welding
welding the automobile winding, the resistance spot welding
application has already obtained the development which progressed by
leaps and bounds. Although the recent years various countries
scholar proposed many new thin steel plates connections technology one
after another, but the resistance spot welding relies on its low cost,
is easy to realize characteristic and so on high speed automated
production, decided it still was the main connection manufacture craft
which 轿车?the automobile body assembles.
According to at present automobile industry in the spot welding
technology widespread application present situation, the electrically
operated actuation and the air operated actuation took two kind of
most main systems are widely applied to a welding torch actuate the
domain.
The broad market demand and the strict welding quality
requirement actuated the domain to the welding torch to set a higher
request:
?reduces the cost, reduces the volume, saves various parts
space;
?is easy to install, the establishment, the service;
?enhancement welding systematically reliability;
?precisely smoothly controls the welding pressure;
?reduces the working procedure the time.
The promise crown company took the movement, the fluid, the
proportional control aspect expert, its design pneumatic servo through
the reduced system module, enhances the maintenance cycle, simplifies
the parameter establishment and the maintenance work causes the spot
welding technology to simplify, has the same level performance with
the electrically operated servo but the cost to be lower.
This system major component has the VP60 5/3 proportion flow
control valve, the DN3 1/2 pair of proportion valve, on the VP33
pressure control valve, the balance cylinder, the connecting rod
integrates the position transducer the integrated air cylinder, the
attire uses in the real-time monitoring execution pressure two
pressure switch on the air cylinder as well as uses in the system
smooth movement balance cylinder.
Through the position transducer signal and the flow control
valve movement, may to the air cylinder position, the speed as well as
the system balance carries on the servo-control; Simultaneously
the pressure controller can the treating pressure switch collect the
information and carries on the exchange of information real-time
control welding pressure with the primary control circuit the change.
Between between control unit as well as the control unit and the
primary control circuit through the main line connection, enable
between various parts real-time precisely to carry on the data
exchange; Moreover the main line type may act according to the
user scene master switch main line the type free choice;
Simultaneously we may draw support the portable computer,
operates the welding torch, data and so on welding pressure directly
fills in to the servo maneuver box unit in or directly controls by the
robot the computer downloading parameter.
The balance cylinder also is holds by the proportion control
valve controls. In addition, balance cylinder second 气腔 is
by the reverse pressure control, this meant, altogether the 10bar
pressure scope all was the balance cylinder may the use (have very big
promotion compared to the present only approximately 4.5bar solution).
The welding torch pneumatic servo has disposed two check valves,
when appears urgently stops the signal, maintains the air cylinder two
sides the air feed pressure, and then prevents the welding torch arm
any movement. Only can through be connected the instruction
replacement way the robot controller in to open the check valve.
The system repositions through the internal main line the
equipment the signal which or the dump supply as well as the system
barometric pressure unusually reduces to bequeath the controller, thus
controls the check valve to shut off. Pressure control valve
VP33 can discharge in the feed line the compressed air.
The pneumatic servo took one kind of emerging welding torch
actuates the system, relies on this its unique superiority, is being
paid attention by more and more many users, moreover the world each
greatly air operated part manufacturer also all vigorously is
developing this service. The promise crown company makes the
welding torch actuates the system, because of it in the proportion
servo-control aspect superiority, already obtained the application in
Europe's some factories; Simultaneously European and American
very many other factories also the extremely strong interest which
produces to it.
System superiority:
?the technology simplifies, improvement quality;
?the expense reduces (compares with electricity servosystem
saves approximately 3000 ?, the part reduces;
?realization equipment update (use tradition air operated
welding torch realization and electricity servo same level
performance);
?the weight is light (< 7kg) ，结构紧?(230 mm * 210mm * 85 mm) ?BR> ?the function is similar to the electricity servo
welding torch (for example 7 axes, softly stops, and so on);
?does not need to take the space to place the electrically
controlled cabinet;
?implementation monitoring breakdown and deviation;
?welding pressure accuracy control also not temperature
influence;
?use, establishment simple, maintains conveniently;
?lengthened the maintenance cycle (焊极, bearing and so on.)
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