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HBS IT 2002 Operating Manual Download Page 30

©HBS Bolzenschweiss-Systeme GmbH & Co. KG

All rights reserved – Reprinting, in whole or in part, only with the approval of the manufacturer

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10 Preparing Workplace and Welding Process

10.2 Checking the Stud Welding Gun

Always check the operating manual of your stud welding gun to see whether it may

be used with this stud welding unit.

This stud welding unit can only be used with the HBS stud welding guns AI 06, A 12,

A 16, A 22 und A 25.

Check the chuck of your stud welding gun for proper fit and ensure it is tightened.

Check the bellows of your stud welding gun for damage.

Check if spring force and lift are set according to the welding parameter table in the

operating manual of the stud welding gun.

Refer here to the operating manual of your stud welding gun.

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Summary of Contents for IT 2002

Page 1: ...Bolzenschweiss Systeme GmbH Co KG All rights reserved Reprinting in whole or in part only with the approval of the manufacturer Operating Manual IT 2002 Stud Welding Unit Ceramic Gas Version 93 60 2202 2021 ...

Page 2: ...info com IT 2002 Operating Manual Issue 2021 01 Order No E BA 93 60 2202 Translation of the Original Operating Manual Please keep the manual in a safe place for future reference Transmission and duplication of this document dissemination and notification of the contents are not permitted unless expressly approved All rights errors and technical amendments reserved HBS Bolzenschweiss Systeme GmbH C...

Page 3: ...d your product No claims can therefore be derived from the data illustrations and descriptions We have compiled the data and information in this reference work with the greatest care and have made every effort to ensure that the information contained in this manual was correct and up to date at the time of delivery We can nevertheless give no guarantee for an absolutely error free document Should ...

Page 4: ...ding Unit 18 8 1 Main Assemblies 18 8 2 Control Panel and Display 20 9 Welding Process 22 Drawn Arc Stud Welding 22 10 Preparing Workplace and Welding Process 28 10 1 Preparing Surfaces 29 10 2 Checking the Stud Welding Gun 30 11 Connection 31 11 1 Connecting the Welding Gun to the Stud Welding Unit 32 11 2 Shielding Gas Connection 33 11 3 Connecting the Ground Cable 34 11 4 Connecting the Stud We...

Page 5: ...djusting the Gas Pre Flow Time 46 12 4 2 Library Mode 47 12 4 3 Conversion Current Curve 47 12 5 Performing the Welding Process 48 13 Checking the Quality of the Weld 52 13 1 Carrying out Visual Inspection 52 13 2 Carrying out Bending Test 53 13 3 Optimisation of Welding Parameters 55 13 4 Blowing Effect and Remedies 56 14 Troubleshooting 57 15 Shutting Down 59 16 Maintenance and Care 60 16 1 Clea...

Page 6: ...lding machine You endanger yourself and others if you operate the stud welding machine incorrectly or fail to observe the safety precautions and warnings This can lead to serious injury or extensive material damage Danger for unauthorised operating personnel Work with the stud welding machine only when You are appropriately trained instructed and authorised to do so and You have read and completel...

Page 7: ... within the meaning of the EMF directive In this case never remain in the vicinity of the stud welding machine during welding Never operate the stud welding machine if persons are located nearby who are among the group of workers at particular risk within the meaning of the EMF directive Strong electromagnetic fields are produced in the vicinity of the stud welding machine during welding These fie...

Page 8: ...nce with the relevant standard Non flammable clothing A protective apron over your clothing Full ear hearing protection in accordance with the relevant stan dard A safety helmet when welding above your head Safety shoes Safety goggles with sight glass of protection level 2 in compli ance with the applicable standards and do not look directly into the electric arc Remove all flammable materials and...

Page 9: ...workers Strong electromagnetic fields are produced in the vicinity of the stud welding machine during welding To reduce the danger posed by electromagnetic fields we recommend among other things the following rules of conduct Lay all cables as close together as possible For proper bundling and safeguarding of the cables HBS offers protective tubes in various sizes Do not position yourself between ...

Page 10: ...l damage Caution Problems in operating may occur if this information is not observed No access for people with active implanted cardiac devices No access for persons with implants made of metal No access for pregnant women Danger Warns you of electrical hazards Danger Warns you of electromagnetic fields that can be generated during welding These symbols prompt you to wear personal protective cloth...

Page 11: ...ufacturer 2 Symbols and Terms Used Tip Cross reference to useful information on the use of the stud welding machine Cross references in this operating manual are marked with this symbol or are printed in italics Fire hazard Have a suitable fire extinguisher for the working area ready before starting work Work instruction List ...

Page 12: ...into direct voltage Stud feeder Device for automatic feeding of welding elements Stud welding gun Device for welding of welding elements Stud welding system Stud welding unit including stud welding gun or welding head Stud welding unit Device for provision of the electrical energy for stud welding Thyristor Electronic component for contact free switching of high currents switching takes place via ...

Page 13: ...60 2202 1 Operating manual IT 2002 E BA 93 60 2202 During transport and set up of the machine safety against tilting is only guaranteed up to an angle of 45 A lift unit with a hook can be used for lifting and transporting the stud welding unit Lifting the stud welding unit using the handle is not permitted Inspect the shipment for visible damage and completeness immediately on receipt Report any t...

Page 14: ...und cable is available as an accessory No of pieces Part Type Order No 1 Ground cable for A 12 A 16 A 22 A 25 with adaptor 88 16 760 5 m 70 mm 93 40 019 for welding elements up to M20 1 Ground cable for A 12 A 16 A 22 A 25 with adaptor 88 16 760 5 m 95 mm 93 40 072 for welding elements up to M22 1 Ground cable for A 25 5 m 120 mm 93 40 080 with adaptor 88 16 760 2 pieces necessary ...

Page 15: ...d steel stainless steel aluminium Welding rate Dia 22 6 studs min Welding current 2000 A Current adjustment range 300 to 2000 A stepless Welding time 5 to 1500 ms stepless Primary power 400 V 3 phases 50 60 Hz 63 AT alternative input voltages available Primary plug 63 A 400 V mains Connected load 100 kVA 400 V mains Cooling type F temperature controlled cooling fan IP Code IP 23 also permits opera...

Page 16: ...S stud welding guns A 12 A 16 A 22 A 25 and AI 06 The intended use also implies observance of the stud welding gun operating manual and compliance with the intervals and conditions for inspection and maintenance of the stud welding unit and the components employed Always check the operating manual of your stud welding gun whether it may be used with this stud welding unit The stud welding unit mus...

Page 17: ...safety precautions Use for other than the intended purpose or Transport damage Warranty entitlement shall no longer be valid if modifications changes or service and repair work is carried out by unauthorised persons or without the knowledge of the manufacturer Invalidation of warranty entitlement shall also render the declara tion of conformity invalid The CE marking shall be declared invalid by t...

Page 18: ...pacitors 5 Control unit 9 Welding current stabilizer After passing the mains switch 1 and the EMC filter 2 the mains alternating current is converted in the bridge rectifier 3 The rectified voltage is smoothed by the electrolytic capacitors 4 and transferred to the IGBT switches 7 These switches convert the direct current into a high frequency alternating current of 30 kHz The energy is transferre...

Page 19: ...ion of pilot arc ignition of main arc sequence of welding time Welding with shielding gas forming gas During the welding processes the stud welding unit automatically regulates the timing of the gas flow Welding time and welding current are steplessly adjustable Type plate The type plate is located on the backside of the stud welding unit The type plate contains the following information Manufactu...

Page 20: ...ng Unit 8 2 Control Panel and Display 1 2 3 4 5 6 7 8 9 10 11 12 13 Welding time Welding current Shorter Longer Trigger Contact Locked Temperature Error fault Automation not available Shielding gas Lower Higher The condition of the welding unit is monitored after switching on After self test the digital displays show the last set welding time 1 and welding current 2 ...

Page 21: ...the welding element and the workpiece Red The stud welding unit is locked After welding as long as there is electrical contact with the workpiece Green The stud welding unit is ready for welding Red The stud welding unit is locked if the stud welding unit is overheated 8888 appears on the display and LED lights up After a short cooling period the work can be continued Red The stud welding unit is ...

Page 22: ... length of welding time standard ARC or short cycle drawn arc stud wel ding SC The energy source welding rectifier supplied by mains inverter capacitor batte ry Drawn Arc Stud Welding The HBS stud welding unit operates by process of arc stud welding with drawn arc ignition according to the current standards The standards assign this method of joining pin shaped elements with plane workpieces to th...

Page 23: ...he stud is mechanically moved to the workpiece On plunging into the weld pool the two weld zones join and solidify The contact of stud and workpiece extinguishes the arc in a short circuit and the main current is switched off The weld zone solidifies and cools down The welding element is now welded to the workpiece over its entire cross section of the welding element see figure position 4 As soon ...

Page 24: ...mic ferrule CF Shielding gas SG Shielding gas SG or no protection NP Material welding element suitable for welding Mild steel stainless steel Mild steel stainless steel alumi nium up to 12 mm Mild steel stainless steel brass and aluminium with shielding gas Workpiece surface Metallic bright rolling skin rust film welding primer Metallic bright rolling skin rust film welding primer Metallic bright ...

Page 25: ...The ceramic ferrule CF prevents atmosphere from getting to the weld pool by a formation of metal vapor in the arc chamber stabilizes and concentrates the arc thus decreasing the arc blow effect forms the melt under pressure to a weld collar and supports the weld pool on a vertical wall and overhead protects the welder from arc radiation and welding spatters Normally the ceramic ferrule is used for...

Page 26: ...ainless steel DIN EN ISO 14175 M21 82 Ar 18 CO2 90 Ar 10 CO2 92 Ar 8 CO2 Aluminium and alumini um alloys DIN EN ISO 14175 I1 DIN EN ISO 14175 I3 85 Ar 15 He 70 Ar 30 He As a result of the higher amount of CO2 the surface tension of the weld pool is reduced which may lead to increased spatter formation For larger plate thicknesses the helium content may be increased The shielding gas influences the...

Page 27: ...as is used for welding elements within a diameter range of 3 to 12 mm nominal diameter without flange and welding times between 10 and 100 ms Due to the short welding times the energy input and the weld pool are so small that also welding elements up to 12 mm diameter can be welded on thin workpieces Normally welding elements with flange according to current standards are used which forms a larger...

Page 28: ...accident preven tion regulations This will help to avoid health damage due to fumes and airborne particu lates Danger from fire and explosion Remove all inflammable materials and liquids from your working area Ensure that there are no explosive materials in your working area Ensure that an approved fire extinguisher is available at the workplace Danger from tripping and falling Lay cables and conn...

Page 29: ... welding unit Always place the stud welding unit on a stable level and clean surface Check the condition of all cables and cable connections Have defective cables or their connections immediately repaired or repla ced by a qualified electrician 10 1 Preparing Surfaces Remove Paint oil and other impurities Rust Non conductive coatings of surface coated materials from the welding surface and the con...

Page 30: ...ee whether it may be used with this stud welding unit This stud welding unit can only be used with the HBS stud welding guns AI 06 A 12 A 16 A 22 und A 25 Check the chuck of your stud welding gun for proper fit and ensure it is tightened Check the bellows of your stud welding gun for damage Check if spring force and lift are set according to the welding parameter table in the operating manual of t...

Page 31: ...e point 10 Preparing Workplace and Welding Pro cess Electric shock hazard Leave the stud welding unit switched off during connection of the connec ting leads In this way you can avoid any unintentional starting of the welding process Secure the cables Strong magnetic fields are generated during the welding process that can lead to whipping of the cables This can cause the cables to come out of the...

Page 32: ...o the correspon ding socket of the stud welding unit Press in the plug and turn it firmly clockwise to the right Connect the control cable Plug the control cable in the connector of the stud welding unit Twist the retaining nut of the control cable connector clock wise Only loosely made connections will result in damage to the plug con nectors Therefore always check that the plug connector is firm...

Page 33: ...ng unit Connect the gas hose of the welding gun to the gas outlet Set the flow meter of the shielding gas bottle to 8 16 liters min Minimum flow rate for stud welding with shielded gas is 8 l min For stud welding a shielding gas mixture according DIN EN ISO 14175 is used Please refer to chapter 9 for more detailed information You must not put the air hose into the gas valve of the stud welding uni...

Page 34: ...Only loosely made connections will result in damage to the plug con nectors Therefore always check that the plug connector is firmly inserted This prevents a poor contact and hence overheating of the plug connectors Connect the ground clamps Remove rust paint and dirt from the points on the workpie ce to which you wish to connect the ground clamps Attach the ground clamps to the workpiece as tight...

Page 35: ... an electrician check whether the plug socket to which you intended to connect the stud welding unit is correctly earthed Connect the stud welding unit only to a mains supply with the same mains voltage as that indicated on the type plate Compare the current consumption indicated on the type plate with the fuse of your mains power supply Check that the stud welding unit is switched off Only now in...

Page 36: ...rs with passive implanted medical devices that contain metal Workers with medical devices worn on the body Pregnant workers Never operate the stud welding machine if you are among the group of workers at particular risk within the meaning of the EMF directive In this case never remain in the vicinity of the stud welding machine during welding Never operate the stud welding machine if persons are l...

Page 37: ...urrent Determination of welding time and welding current at the stud welding unit using the arrow keys depends i a on the welding gun used the material of the welding element the diameter of the welding element the material of the workpiece Determine welding time and welding current to be set at the stud welding unit using the following tables The figures in these tables are indicative values and ...

Page 38: ...RD 3 M20 16 5 3 4 0 650 1400 670 RD 3 M24 20 0 1 0 787 1700 1000 Ø d1 Ø d2 Ø d1 Ø d2 PD MD DD 3 M6 5 35 1 4 0 21 450 100 PD MD DD 3 M8 7 19 5 16 0 28 500 250 PD MD DD 3 M10 9 03 3 8 0 36 550 330 PD MD DD 3 M12 10 86 1 2 0 43 675 420 PD MD DD 3 M16 14 60 5 8 0 57 1200 550 PD MD DD 3 M20 18 38 3 4 0 72 1500 750 PD MD DD 3 M24 22 05 1 0 87 1700 1000 Ø d1 Ø d1 UD Pins 3 3 ISO 4 12 gage 5 5 UD Pins 3 4...

Page 39: ...3 M12 18 3 4 0 709 675 420 ID 3 M16 22 7 8 0 866 1200 670 Ø d1 0 4 Ø d1 0 4 SD 3 9 5 10 3 8 550 330 SD 3 12 7 13 1 2 675 420 SD 3 16 5 8 1200 670 SD 3 19 3 4 1500 840 SD 3 22 7 8 1700 1000 Ø d1 Ø d2 Ø d1 Ø d2 PS US IS 4 M3 4 1 8 0 157 400 10 PS US IS 4 M4 5 5 32 0 197 600 15 PS US IS 4 M5 6 3 16 0 236 700 15 PS US IS 4 M6 7 1 4 0 276 800 20 PS US IS 4 M8 9 5 16 0 354 5 5 PS US IS 4 M10 11 3 8 0 43...

Page 40: ...D 3 M24 20 0 1 0 787 7 7 Ø d1 Ø d2 Ø d1 Ø d2 PD MD DD 3 M6 5 35 1 4 0 21 490 120 PD MD DD 3 M8 7 19 5 16 0 28 670 180 PD MD DD 3 M10 9 03 3 8 0 36 840 220 PD MD DD 3 M12 10 86 1 2 0 43 970 275 PD MD DD 3 M16 14 60 5 8 0 57 1300 550 PD MD DD 3 M20 18 38 3 4 0 72 7 7 PD MD DD 3 M24 22 05 1 0 87 7 7 Ø d1 Ø d1 UD Pins 3 3 ISO 4 12 gage 250 60 UD Pins 3 4 ISO 8 320 90 UD Pins 3 5 ISO 10 3 16 425 150 UD...

Page 41: ...0 866 1000 550 Ø d1 0 4 Ø d1 0 4 SD 3 9 5 10 3 8 840 220 SD 3 12 7 13 1 2 970 275 SD 3 16 5 8 1000 550 SD 3 19 3 4 7 7 SD 3 22 7 8 7 7 Ø d1 Ø d2 Ø d1 Ø d2 PS US IS 4 M3 4 1 8 0 157 400 20 PS US IS 4 M4 5 5 32 0 197 500 25 PS US IS 4 M5 6 3 16 0 236 600 30 PS US IS 4 M6 7 1 4 0 276 700 40 PS US IS 4 M8 9 5 16 0 354 950 40 PS US IS 4 M10 11 3 8 0 433 1000 100 1 to be checked by test weldings 2 When ...

Page 42: ...Ø d1 Ø d3 PS US IS 4 M6 7 1 4 0 276 850 15 PS US IS 4 M8 9 5 16 0 354 900 40 PS US IS 4 M10 11 3 8 0 433 1000 120 1 to be checked by test weldings 2 When using alloyed steels the welding energy welding current or welding time must be reduced by about 10 3 Information and recommendations on this can be found in DIN EN ISO 14555 4 Information and recommendations on this can be found in DVS 0902 7 Sh...

Page 43: ...ing time is generally selected for the same welding current When using the lib rary mode the values for welding current and welding time are automatically adapted to the welding process For alloyed steel a 10 lower current is generally selected The specified values apply for welding in welding position PA When welding in welding position PC the welding time must be reduced For short cycle stud wel...

Page 44: ...imum flow rate for stud welding with shielding gas is approx 8 l min Check that the stud welding unit is switched on Switch on the Shielding gas option on the stud welding unit Actuate the welding gun button without placing the stud welding gun on the workpiece air shot The flow meter displays the amount of shiel ding gas flowing in l min Set the flow rate according to your welding task ...

Page 45: ...ing Time First determine the necessary welding time Read and observe here Point 12 2 Determining the Welding Time and Welding Current Only now set the welding time digital display with the arrow keys Adjusting the Welding Current First determine the necessary welding current Read and observe here Point 12 2 Determining the Welding Time and Welding Current Only now set the welding current digital d...

Page 46: ...ding gun is removed from the joined welding element Adjust the flow meter at the gas bottle to 8 to 16 litres min minimum 8 l min Press the shielding gas key LED shielding gas lights up The display welding time shows the gas pre flow time Set the gas pre flow time with the two arrow keys longer shorter After approx 2 seconds the display welding time automatically switches back to the previously se...

Page 47: ...ted welding current In addition you can modify the welding time and welding current individually by pressing the arrow keys as described above If you are working with shielding gas different welding parameters for stud diameters from 6 mm to 12 mm are available in library mode 12 4 3 Conversion Current Curve It is possible to adjust the current curve for a special welding method There is a dif fer...

Page 48: ...ly con ductive parts in their vicinity during the welding process These parts are live Never wear metal jewellery even a wristwatch on your body during the welding process This will help to avoid injuries and damage due to electric power or electro magnetic fields Electric shock and electric arc hazard Stand on an insulated mat if you have to weld under the following condi tions In confined spaces...

Page 49: ...ons Such work may only be carried out by welding specialists Do not carry out such work if you have not been specially trained for it Risk of fire and burns due to glowing weld spatter Wear your personal protective equipment and your safety goggles with sight glass of protection class 2 Wear a protective helmet when welding over head Remove all inflammable materials and liquids from the vicinity o...

Page 50: ...sary Place the welding gun perpendicularly onto the workpiece as soon as the stud welding unit is ready for the welding process Press the welding gun firmly with both hands against the workpiece until the wel ding gun attachment spacer is resting uniformly on the workpiece Hold the welding gun firmly steady and straight Ensure that you do not touch any metal parts of the welding gun Only now shoul...

Page 51: ...n not to mix welding elements from different batches Carry out test welds again after a batch change Even the slightest changes to the geometry in particular to the tip of the welding elements require different settings for the welding process Now check the quality of the welded joint before inserting a new welding element and repeating the welding process Work in accordance with the following poi...

Page 52: ...n tolerances Correct parameters none Contraction of weld collar Welding element too long Plunging depth or lift too low Increase plunging depth check lift and centering of the ceramic ring Weld power too high Reduce current and or time Ceramic ring not centered correctly Check centering Plunge rate too high Adjust plunge and or gun dumper Weakly developed uneven weld collar with mat surface Weldin...

Page 53: ...ressed by bending in a non defined way 1 Welding element 2 Welded joint Place the bending device on the welding ele ment 1 and bend the welding element 1 with the bending de vice once by 60 in any direction The bending test is passed if a crack or a fracture of the welded zone does not occur Further tests should be conducted if the connection fails in the weld area In this case bend the welding el...

Page 54: ...rmation Correct parameters none Fracture within the weld High porosity Weld energy too low Increase current and or welding time Unclean surface Clean the surface Material not suitable for stud welding Select suitable material Fracture of weld Bright appearance Welding time too low Increase welding time If the strength of the joint is inadequate then check the setting of the stud welding unit check...

Page 55: ...ers As first step conduct the tests outlined under points 13 1 and 13 2 As second step optimise the welding parameters according to the table under point 12 2 Determining the Welding Time and Welding Current Optimise the welding parameters of the stud welding unit Check the settings of the welding gun If necessary re adjust the lift and spring pressure Refer here to the operating manual of your we...

Page 56: ... edge of a workpiece a blowing effect can occur This is an undesirable deflection of the electric arc This results in uneven melting of the stud material in increased poring and undercuts in the welding area The blowing effect is proportional to the current amperage and can be influenced by symmetrical connection of the ground terminals by connecting compensating grounds or on welding guns with ex...

Page 57: ...ists No LED display at the front Fuse F5 1 AF defective Check fuse F5 1 AF Replace fuse F5 1 AF Qualified specialists No display No ground connection Check ground connection on workpiece Tighten ground connec tion properly Trained personnel Welding gun not con nected Check welding gun connection Connect welding gun properly Trained personnel Transition resistance between stud and workpiece too hig...

Page 58: ...ive Check solenoid 18 Ω to 22 Ω Replace solenoid Qualified specialists Fuse F3 4 AF defective Check fuse F3 4 AF Replace fuse F3 4 AF Qualified specialists Lifting impossible Solenoid circuit inter rupted Check resistance value at control cable connec tor 18 Ω to 22 Ω bet ween Pin 1 and Pin 2 Replace solenoid or control cable Qualified specialists No shielding gas Shielding gas not connected Check...

Page 59: ...th the approval of the manufacturer 15 Shutting Down 15 Shutting Down Switch off the stud welding unit Pull out the mains plug Disconnect the control cable and welding cables from the stud welding unit Protect the stud welding unit and its components against the ingress of liquids and foreign matter ...

Page 60: ...rsonnel Carry out only the work described here on your stud welding unit Repairs may only be carried out by appropriately qualified personnel Inform your dealer or your maintenance department 16 1 Cleaning Clean the surface of the stud welding unit with a slightly damp cloth when necessary Add a little household detergent to the cleaning water Do not use solvents for cleaning These can damage the ...

Page 61: ...ndition of the mains cable Inform your dealer or maintenance department if you discover any dama ge Check whether the readings on the display of the stud welding unit are still legible before starting work Clean display and control panel in the event of soiling Replace any removed or damaged signs Before opening machine disconnect mains Observe the operating manual Warning of electric shock hazard...

Page 62: ... location when not in use Protect the stud welding unit from moisture and metallic contamination Store the stud welding unit only under the following ambient conditions Storage temperature 5 C to 50 C Relative humidity 0 50 at 40 C 0 90 at 20 C 18 Disposal Dispose of the stud welding unit only via the manufacturer or a specia list disposal company Never dispose of the stud welding unit in the dome...

Page 63: ...e moment of this declaration The product is conform with following further EU Directives including changes to the Directives to be applied at the moment of this declaration Low voltage guideline 2014 35 EU EMC guideline 2014 30 EU Directive on the restriction of the use of certain hazardous substances in electrical and electronic equipment 2011 65 EU Following harmonised standards or parts thereof...

Page 64: ...tor Detailed descriptions of errors Service Support may be done up to the value of EUR without quotation Yes No Could you find any damage burn marks on the cables Yes No on chucks Yes No Are all plug and screw connections tightly fastened Yes No Are there any burn marks on plug or screw connections Yes No Is there any other visual damage e g cracks dents Yes No Have you checked the fuses Yes No De...

Page 65: ...EMF directive safety notices 9 F fire extinguisher 8 49 fire extinguisher approved 28 fire hazard 8 form Service Support 58 64 full ear hearing protection 8 fumes harmful to health 7 28 fuse 35 G glossary 12 goggles with visor 8 ground cable 34 ground clamps 34 H hazards for the machine 10 hazards for the operator 10 heart pacemaker 7 10 36 helmet 8 I intended use 16 30 L library mode 47 liquids i...

Page 66: ...plosive 28 surface of base material 54 surface of welding element 54 switch on the stud welding unit 37 symbols used 10 T technical data 15 test welding 37 troubleshooting 57 type plate 19 V vessels welding work on 49 visual inspection 52 W warranty entitlement 17 welding current 38 40 welding current cable 32 welding current determination 37 welding current stabilizer 18 welding element 12 weldin...

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Page 68: ...HBS Bolzenschweiss Systeme GmbH Co KG Felix Wankel Strasse 18 85221 DACHAU GERMANY Phone 49 8131 511 0 Fax 49 8131 511 100 E mail international hbs info com www hbs info com ...

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