ESAB PKB 250 Manuel utilisateur

AH 0480

0154 117 101 000303

PKB 250

PKB 400

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Bruksanvisning

Brugsanvisning

Bruksanvisning

Käyttöohjeet

Instruction manual

Betriebsanweisung

Manuel d’instructions

Gebruiksaanwijzing

Instrucciones de uso

Istruzioni per l’uso

Manual de instruções

Ïäçãßåò ÷ñÞóåùò

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Rätt till ändring av specifikationer utan avisering förbehålles.

Ret til ændring af specifikationer uden varsel forbeholdes.

Rett til å endre spesifikasjoner uten varsel forbeholdes.

Oikeudet muutoksiin pidätetään.

Rights reserved to alter specifications without notice.

Änderungen vorbehalten.

Sous réserve de modifications sans avis préalable.

Recht op wijzigingen zonder voorafgaande mededeling voorbehouden.

Reservado el derecho de cambiar las especificaciones sin previo aviso.

Ci riserviamo il diritto di variare le specifiche senza preavviso.

Reservamo--nos o direito de alterar as especificações sem aviso prévio.

Äéáôçñåßôáé ôï äéêáßùìá ôñïðïðïßçóçò ðñïäéáãñáöþí ×ùñßò ðñïåéäïðïßçóç.

SVENSKA 3..............................................

DANSK 12................................................

NORSK 21................................................

SUOMI 30................................................

ENGLISH 39..............................................

DEUTSCH 48.............................................

FRANÇAIS 57.............................................

NEDERLANDS 66.........................................

ESPAÑOL 75..............................................

ITALIANO 84..............................................

PORTUGUÊS 93..........................................

ÅËËÇÍÉÊÁ 102.............................................

ENGLISH

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TOCe

1 DIRECTIVE 40........................................................

2SAFETY 40...........................................................

3 INTRODUCTION 41...................................................

3.1 General 41..................................................................

3.2 Technical Data 41............................................................

4 INSTALLATION 42....................................................

4.1 General 42..................................................................

4.2 Connecting the Welding Hose 42...............................................

5 OPERATION 42.......................................................

5.1 General 42..................................................................

6 MAINTENANCE 43....................................................

6.1 General 43..................................................................

6.2 Daily or As Necessary 43......................................................

6.3 Replacing the Air Filter 44.....................................................

6.4 Replacing the Wire Guide 44...................................................

6.5 Dismantling the Motor 45......................................................

6.6 Mounting the Motor 46........................................................

7 TROUBLE SHOOTING 47..............................................

7.1 Checking for air leaks 47......................................................

8 ORDERING OF SPARE PARTS 47......................................

SPARE PARTS LIST 113...................................................

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1 DIRECTIVE

DECLARATION OF CONFORMITY

Esab Welding Equipment AB, S--695 81 Laxå, Sweden, gives its unreserved guarantee that welding

gun PKB 250, PKB 400 from serial number 933 complies with standard EN 50078, in accordance with

the requirements of directive (73/23/EEC).

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Laxå 2000--01--03

Anders Birgersson

Managing Director

Esab Welding Equipment AB

695 81 LAXÅ

SWEDEN Tel: + 46 584 81000 Fax: + 46 584 411924

2SAFETY

WARNING

READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING.

ARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS. TAKE PRECAU-

TIONS WHEN WELDING. ASK FOR YOUR EMPLOYER’S SAFETY PRACTICES WHICH SHOULD BE

BASED ON MANUFACTURERS’ HAZARD DATA.

ELECTRIC SHOCK -- Can kill

SInstall and earth the welding unit in accordance with applicable standards.

SDo not touch live electrical parts or electrodes with bare skin, wet gloves or wet clothing.

SInsulate yourself from earth and the workpiece.

SEnsure your working stance is safe.

FUMES AND GASES -- Can be dangerous to health

SKeep your head out of the fumes.

SUse ventilation, extraction at the arc, or both, to keep fumes and gases from your breathing zone and

the general area.

ARC RAYS -- Can injure eyes and burn skin.

SProtect your eyes and body. Use the correct welding screen and filter lens and wear protective

clothing.

SProtect bystanders with suitable screens or curtains.

FIRE HAZARD

SSparks (spatter) can cause fire. Make sure therefore that there are no inflammable materials nearby.

NOISE -- Excessive noise can damage hearing

SProtect your ears. Use ear defenders or other hearing protection.

SWarn bystanders of the risk.

MALFUNCTION -- Call for expert assistance in the event of malfunction.

PROTECT YOURSELF AND OTHERS!

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3 INTRODUCTION

3.1 General

PKB is an air--operated welding gun with a pneumatic motor incorporated in the

handle. A wire feed unit is fitted in the gun housing.

Different welding speeds can be selected by way of a valve regulating the speed of

the motor.

The welding gun is available in two models, PKB 250 and PKB 450. In the PKB 450

model the outgoing air is used for forced cooling of the gun.

Swan Neck

The gun can be provided with a swan neck which is turnable 360Ρwhen the locking

screws in the wire feed unit have been loosened.

The swan neck provides better access when welding in narrow spaces.

Gun Trigger

When the trigger is pressed into its first position the flow relay of the feed unit is

activated and the operating circuit closes.

When the trigger is pressed as far as it will go the air valve is fully opened and the

wire is fed according to the set value.

By slackening the trigger a little during welding, both the wire feed speed and the

welding current will be decreased and the control of the molten pool will be

improved.

ValveforSettingtheWireFeedSpeed

The wire feed speed is proportional to the welding current and is set by way of the

speed regulator on the welding gun.

The wire diameter is of vital importance to the welding current. The coarser the wire,

the higher the amperage.

The speed regulator on the PKB is graded 0--9. The index arrow on the left--hand

side of the gun housing indicates the zero position. The knob can be turned some

2.5 turns.

PKB 400 is provided with a hand shield against the heat radiation.

Welding Hose

The welding hose is available in three lengths: 5, 10 and 16 m.

3.2 Technical Data

Welding gun PKB 250 PKB 400

Permissible load at 60% duty cycle

Carbon acid CO2

Gas mixture, Argon (Al electrode)

’

250 A / 26.5 V

200 A / 24 V 400 A / 34 V

280 A / 28 V

Electrode diameter 0.6--1.2 mm 0.6--1.6 mm

Air consumption Max. 280 l/min Max. 280 l/min

Dimensions l x h 210 x 250 mm 210 x 260 mm

Weight 1.2 kg 1.4 kg

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Welding hose A9--250 A9--400

Permissible load at 60% duty cycle

Length: 5 m, 10 m, 16 m 250 A 400 A

Electrode diameter 0.6--1.6 mm 0.6--1.6 mm

Working pressure 490 kPa (5 kp/cm2)490 kPa (5 kp/cm2)

Max. testing pressure 735 kPa (5 kp/cm2)735 kPa (5 kp/cm2)

NB. Make sure the gun motor has the proper working pressure, 490 kPa (5 kp/cm2). If the pressure is

lower the motor will not get the right speed, resulting in too low wire feed speed and welding current. If

the pressure is higher the welding hose will be exposed to harmful dynamic pressure.

4 INSTALLATION

4.1 General

The installation shall be executed by a professional.

4.2 Connecting the Welding Hose

SPress the inlet nozzle (a) -- selected according to the diameter of the wire -- into

the welding hose.

SOpen the wire feed unit on the bobbin side.

Undo the locking screw (c) on the connecting plate.

Connect the welding hose (b) to the wire feed unit and tighten the locking screw

on the connecting plate.

SRemove the plastic cover (d) from the gun housing.

Undo the locking screw (e) and press the other end of the hose into the gun.

Tighten the locking screw and fit the plastic cover.

5OPERATION

5.1 General

General safety regulations for the handling of the equipment appear from

page 40. Read through before you start using the equipment!

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Welding Gun PKB 250 and PKB 400

Before starting to use of a new welding gun, or after replacement of the motor, the

gun is to be operated at full air pressure (590 kPa, 6 kp/cm2) for a short while.

This causes solidified oil and grease in the pneumatic motor to be dissolved, and

ensures uninterrupted service.

6 MAINTENANCE

6.1 General

Note:

All warranty undertakings given by the supplier cease to apply if the customer

attempts to rectify any faults on the machine during the warranty period.

6.2 Daily or As Necessary

Nozzles

SRemove the gas nozzle.

SClean the gas nozzle, the

intermediate nozzle and the contact

nozzle of welding spatter so that the

shielding gas can flow freely and the risk of short--circuiting

is eliminated.

SCheck the gas nozzle for damage and wear. Replace the nozzle if damaged or

worn.

SSelect a contact nozzle according to the diameter of the wire.

SAssemble the parts.

SSpray with welding spray obliquely into the gas nozzle from two directions.

SNB. Never spray straight into the nozzle.

Pneumatic Motor

The motor is provided with an oil nipple for its lubrication.

SLubricate the motor once a week (normal

operation) using the lubrication gun supplied

with the welding gun.

SUse oil of the type Shell Super Oil 10 W/50,

ESAB’s order number 0151 370 001.

Feed Unit

STake out and clean the feed unit of the gun as

necessary.

SLubricate the feed unit with some drops of oil.

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6.3 Replacing the Air Filter

In order to protect the pneumatic motor of the welding gun from impurities the PKB

guns are provided with an air filter.

The filter is fitted in the gun housing in the groove between the two O--rings where

the gas hose is connected.

When a new filter is to be fitted the outer ring must first be removed.

SMake sure the filter is properly fixed before the O--ring is fitted.

6.4 Replacing the Wire Guide

a Inlet nozzle u Inlet end

f Compression gland x Compressed--air inlet

g Outlet nozzle y Shielding gas inlet

h Wire guide zO--rings (inside the tube)

i O--rings

SUndo the locking screws on the welding hose connections to the wire feed unit

and the gun, then pull out the welding hose.

SPull out the inlet nozzle (a) and screw out the compression gland (f) on the inlet

side and the outlet nozzle (g) on the gun side.

SWithdraw the wire guide (h) from the inlet end. Make sure the o--rings (i) in the

connecting piece come along.

SFit the new wire guide. Stretch out the welding hose and check that the o--rings

at the end of the gun are properly fitted in the grooves. Taper the end of the wire

guide using a file.

SInsert the new guide through the gun connection. If this proves troublesome,

lubricate the end of the wire guide with a little oil or silicon grease.

SFasten the inlet nozzle with screws at the gun end of the welding hose.

SAdjust the length of the guide at the inlet end of the welding hose. Cut the guide

so as to include an excess length of six mm per metre hose, e.g. for a five--metre

welding hose the wire guide is to be cut 30 mm outside the inlet end of the hose.

SInsert the o--rings round the wire guide and then fasten the compression gland

with screws.

SPress in the inlet nozzle.

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6.5 Dismantling the Motor

1. Remove the plastic cover (d) on the gun housing. Undo the locking screw (e)

using an Allen key and remove the welding hose.

Unload the spring (y) and undo the screws (j) holding the contact tube.

Remove the tube.

2. Turn the welding gun upside--down. Wire the feed unit (k) can now be easily

removed.

3. Insert a 90 mm long metal rod with a diameter of 2 mm through the hose

connection hole in the gun housing.

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Push out the roll pin (l) in the motor shaft which holds the feed roller of the motor

shaft in place.

Remove the feed roller.

4. Remove the hand shield, if any, then gun trigger (m), rubber handle (n) and

contact tube (o).

Check that the three o--rings of the tube (v) come along.

5. Fasten the motor housing (p) in a screw vice or the like, protected by two

wooden jaws, and tighten moderately.

Screw out the left--threaded gun housing (q).

If the motor is rotating in its housing it cannot be dismounted from the housing of

the gun. Then tighten the right--threaded rear (s) a bit harder, using an open end

wrench with a jaw width of 28 mm.

6. Screw out the gun housing (q).

At the same time remove the protective cap (r) of the gasket ring (a transparent

plastic sleeve) from the motor shaft.

Make sure that the sleeve, which is to be put back on the motor shaft, is not

damaged.

6.6 Mounting the Motor

1. Place the new motor (p) between the wooden jaws

and tighten moderately.

Tighten the rear (s) and provide the motor shaft with

a guide sleeve (t) to protect the gasket ring of the

gun housing during the assembly.

Screw the left--threaded gun housing in place.

2. Loosen the right--threaded rear (s) using an open end

wrench with a jaw width of 28 mm.

Now the gun housing (q) can be turned. Only the

motor shaft is moving. The motor housing is

secured by screws.

Turn the gun housing so that the rear, after having

been tightened, gets into the proper position for

fitting the connection tube (o).

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