175-4591 datasheet(51/54 Pages) ETC2

51 / 54 page

TO DETERMINE SPOT WELDING SCHEDULE

CURRENT

2T x 100,000

AMPERES

TIME

2T x 100

CYCLES

PRESSURE

2T x 6000 (LB)

FORCE REQUIRED (LB)

T = THICKNESS OF THE THINNEST PIECE

APPROXIMATE PRESSURE EXERTED BY AIR CYLINDER SIZE

DIAMETER

CYLINDER AREA

SQ. INCHES

4”

12.5

5”

19.5

6”

28.0

8”

50.0

RESISTANCE WELDING MACHINE SETUP

Gage

Manufacturer’s

Gage

Manufacturer’s

Gage

Manufacturer’s

No.

Standard

No.

Standard

No.

Standard

0.2391

0.1046

0.0299

0.2242

0.0897

0.0269

0.2092

0.0747

0.0239

0.1943

0.0673

0.0209

0.1793

0.0598

0.0179

0.1644

0,0538

0.0164

0.1495

0.0478

0.0149

0.1345

0.0418

0.0135

0.1196

0.0359

0.0120

0.0329

STANDARD GAGE CHART

1. Use standard Tuffaloy electrodes with Tuffaloy

ejector type, self-adjusting tube, water-cooled

electrode holders wherever possible. Avoid

special or irregular shapes for lowest cost.

2. Use ample cold cooling water as close as practical

to the welding contact surface, properly circulated

at a minimum of 30-psi pressure, and supplied at a

rate of at least 1-1/2 gallons per minute.

3. Be sure to select the proper type and size of

electrode, taking into consideration electrode

pressure, contact area of electrode, gauge, and

nature of material to be welded. Consult the RWMA

Manual* or your Tuffaloy field engineer regarding

recommended practices. Overloading as well as

overheating shortens electrode life.

4. Good welds depend upon properly maintained

electrodes which assure an accurate surface

contact. Keep tapers clean and dress electrode

faces with lathe, emery paddle or fine file.

Use castor oil or graphite grease to facilitate

tip removal, and avoid application of insulators

such as teflon tape and other materials.

ELECTRODE LIFE SAVERS

Many factors affecting electrode cost and useful electrode life

are briefly outlined below.

PART TO BE WELDED

Lay out the part for resistance welding. Designing engineer,

welding engineer and production man in charge of welding

should cooperate in securing a better product at lowest cost.

Correct design permits the use of standard straight electrodes:

or standard offset or standard angular holders if the straight

approach is not possible. Special shaped electrodes cost

more, and the difficulty of cooling the electrode is amplified.

Single spot, multiple spot, projection, or other method may

be accurately chosen to achieve lowest cost. Consult the

R.W.M.A Manual.*

MATERIAL TO BE WELDED

The weldability of the materials can be determined by consulting

your material supplier, and by reviewing recommendations

covered in the R.W.M.A Manual.*

Surface conditions, rust, oil, dirt, and, on many articles, oxide film

and even handling marks have a decided effect on weld quality.

Cleaning may have to be a part of the welding job in some cases.

WELDING EQUIPMENT AND CONTROL

A welding machine of reputable quality purchased for a

particular application will be correctly designed both electrically

and mechanically, and will be supplied the correct control

equipment and electrodes for the work.

On machine change-overs make sure of adequate electrical

and mechanical capacity, and see that the necessary controls

are provided. Consult us when redesigning or revising your

choice of electrodes.

* Resistance Welding Manual, published by the Resistance Welder

Manufacturers Association.

The RWMA tip numbering system has generally replaced the

old Morse taper numbers with new “RW” numbers, and has

added two new sizes, as the chart illustrates.

Thickness in Decimals of an Inch

WELDER

GUAGE

PRESSURE

ELECTRODE

FORCE

PRESSURE

TUFFALOY

helpful suggestions

175-4591 датащи(PDF) 51 Page - List of Unclassifed Manufacturers

175-4591 датащи(HTML) 51 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

датащи скачать

ссылки URL