1、 STD*RWMA BULL Lb-ENGL L99b 7b78558 0000913 552 BULLETIN 16 Page 144 I Supersedes AUG96 JAN 96 I RESISTANCE WELDER MANUFACTURERS ASSOCIATION FOREWORD Bulletin I6 reflects the product standardization efforts of the RWMA Technical Committee and Subcommittees. The participants included Regular Member C
2、ompanies, Associate Members and other interested parties. This document is not intended to be a consensus standard limiting the range of resistance welding products or processes in the market place. Bulletin 16 is a harmonization document created through the efforts of the RWMA to minimize random pr
3、oduct variation. This bulletin does not encompass the entire range of North American “standard“ resistance welding products. Where several variations exist in the market, the participants have formulated a standard design based on the perceived “best practice“. The new format for Bulletin 16, 3-ring
4、 binder, will allow timely revisions and updates to be made as technology advances become known. The RWMA welcomes input on any issue relating to the design, manufacture and application of resistance welding components, equipment and processes. To submit suggestions, become an active participant or
5、obtain additional copies of this or any other RWMA publication, contact the RWMA at: Resistance Welder Manufacturers Association 1900 Arch Street Philadelphia, PA 191 03-1498 Phone 21 5.564.3484 Fax 2 1 5.963.9785 Copyright pending. No part of this bulletin may be reproduced without the express prio
6、r written permission of the Resistance Welder Manufacturers Association. STD-RWMA BULL Lb-ENGL L99b 7b78558 OUOU715 325 RESISTANCE WELDER MANUFACTURERS ASSOCIATION RWMA BULLETIN 16 STANDARDS GENERAL INDEX I .0.1 Standard RWMA Bulletin 16 Tables Index RWMA Bulletin 16 Figures Index RWMA Bulletin 16 A
7、ppendix Index Nomenclature and Definitions Spot Welder Standards, Rocker Arm Type Spot and Projection Welder Standards - Press Type Seam Welder Standards Upset-Butt Welder Standards Flash-Butt Welder Standards Electrical Standards for Resistance Welding Equipment Electrode Standards Fluid Power Stan
8、dards BULLETIN 16 Page 14-1 lJAN96 I Supersedes JUN Ei Sect i on Number 1 .o2 1 .O3 1 .O4 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 STD*RWMA BULL BULLETIN 16 Page 10-2 Supersedes JUN 84 1.0.2 Table Number 1.2.1 1.2.2 1.2.3 1.3.1 1.3.2 1.3.3 1.3.4 1.4.1 1.4.2 1 S.1 1 S.2 1.6.1 1.6.2 1.7.1 1.7.14 1.7.15 1.7
9、.16 1.8.0 1.8.1 1.8.2 1.8.3 1.8.4 1.8.5 RESISTANCE WELDER MANUFACTURERS ASSOCIATION RWMA BULLETIN 16 TABLES INDEX Title Page Number 1-2-1 1-2-2 1-2-5 Rocker Arm Type Spot Welder Size Standards Rocker Arm Type Spot Welder Water Cooling Standards Rocker Arm Type Welder Short Circuit Current Standards
10、Press Type Spot and Projection Welder Water Cooling Standards Press Type Spot And Projection Welder Size Standards 1-3-1 1 -3-2 such as water cooled cable , kickless cable, or dry jumper cable. A rotating electrode with the contacting surface at the periphery through which the welding current and, i
11、n most cases, pressure are applied directly to the work. May be in the form of a “Seam Welding Wheel“ or “Welding Wheel“. ELECTRIC / PNEUMATIC WELDER Type of welder which uses air pressure and electric control to determine weld time and weld pressure. ELECTRODE ADAPTOR Portion of electrode holder wh
12、ich prevents electrode from slipping. May be tapered, wedged, or screwed. Threaded electrode adaptors are used to provide longer electrode holder life, by providing a changeable tip socket in holders having threaded openings. The tapered shank adaptors are used to either change the capacity of holde
13、rs have tapered tip sockets to a different electrode size, or to change the direction of the electrode. ELECTRODE FORCE ELECTRODE HOLDER FOLLOW UP FORCE TRANSDUCER The amount of effort (force) applied by electrodes to material being welded. A device for mechanically holding the electrode and conduct
14、ing current. The ability of an electrode to move at the same rate that the welding material becomes plastic. A device that transmits energy from one system to another based on the amount of pressure exuded on the device. Typically used to measure or monitor electrode force. STD*RWMA BULL Lb-ENGL L99
15、b W 7b78558 0000922 565 = I BULLETIN 16 I Page 1-1-2 1 Supersedes JUN 84 I RESISTANCE WELDER MANUFACTURERS ASSOCIATION 1 .I .O STANDARD NOMENCLATURE AS USED IN RESISTANCE WELDING PRACTICES* (continued) FORGE FOOT OPERATED WELDER GAP GEAR DRIVE HORN HORN SPACING KNEE KNURL DRIVE LOW PRESSURE TIP CLEA
16、NING AND ELECTRODE ALIGNING VALVE MOVABLE PLATEN OPEN CIRCUIT VOLTAGE OPEN SIGHT WATER DRAIN PLATEN PLATEN FORCE PLATEN SPACING PRESSURE SWITCH QUILL A timed function, effected by solenoid valve control, which increases the electrode force; usually begins before the end of the weld or weld interval;
17、 normally employed to produce increased density of weld, but may also be used to increase nugget size. Type of welder which is operated through use of a foot treadle and where weld force is dependent on the adjustment of a compression spring coupled to a push rod assembly. In most basic form, weld t
18、ime is determined by operators foot movement on foot treadle. May also have electric timing device. Distance between horns or arms. A means of driving a circular electrode of a seam welding machine in which the driving torque is transmitted to the electrode through a train of gears. Essentially cyli
19、ndrical am or extension of an arm of a resistance welding machine which transmits the electrode force and conducts the welding current. Typically used to hold electrode or electrode holder. (See Arm) See “Throat Height“ The lower arm or supporting structure in a resistance welding machine. A means o
20、f driving a circular electrode of a seam welding machine in which the driving toque is transmitted to the electrode through a friction roll. A low pressure system which allows electrodes to come in contact under low force for purpose of dressing or alignment. A platen which is moved relative to the
21、main body of the machine by an operating mechanism. The voltage between open electrodes when rated voltage is applied to transformer primary. Water return or discharge is routed to drain with individual circuits to allow visual and “feel“ of water flow and temperature. Can be used to maximize water
22、cooling and reduce waste. A member with a substantially flat surface to which dies, fixtures, backup or electrode holders are attached, and which transmits the electrode force or upsetting force in a resistance welding machine. See “Electrode Force“ The distance between adjacent surfaces of the plat
23、ens in a resistance welding machine. A switch that is responsive to a rise or drop in pressure, may be fluid or air. See “Ram“ - STD-RWMA BULL Lb-ENGL L79b 7b78558 0000923 LiTL W RESISTANCE WELDER MANUFACTURERS ASSOCIATION BULLETIN 16 Page 1-14 JAN 96 I Supersedes JUN 84 1.1 .O STANDARD NOMENCLATURE
24、 AS USED IN RESISTANCE WELDING PRACTICES* (continued) RAM RAM AIR LOCK RETRACTION SEAM WELDING SECONDARY CIRCUIT SECONDARYCURRENT SECONDARY JUMPERS OR “SHUNTS SHORT CIRCUIT CURRENT SINGLE PHASE - AC TYPE WELDER SLIDE THREE-PHASE FREQUENCY CONVERTER RESISTANCE WELDING MACHINE The assembly on press ty
25、pe resistance welding machines through which motion and forces of the operating means are transmitted to the electrode. A second or secondary weld pressure device inserted between the ram and the electrode in close mechanical relationship to the weld region accomplished by means of an auxiliary air
26、system. A device or means to permit manual power operation of the top electrode holder or arm beyond and independent of its normal welding stroke. Resistance welding process wherein coalescence is produced by the heat obtained from resistance to the continuous or intermittent flow of electric curren
27、t through the work parts held together under pressure by circular electrodes. The resulting weld is a series of overlapping spot welds made progressively along a joint by rotating the electrode. That portion of a welder having the fundamental function of conducting the secondary current between the
28、secondary terminals of the welding transformer and the electrodes. Amount produced by resistance welding transformer rated in amps. Flexible current carrying sections of secondary circuit. Typically a laminated copper shunt, flexible dry jumper, or water cooled cable. Rating of resistance welding ma
29、chine secondary current output. The most common type which uses one phase (single phase) of a three phase power supply to supply the welding transformer. See “Ram“; mounting of lower knee on press welder. A frequency converter resistance welding machine employs rectification and/or other control mea
30、ns in the three-phase high voltage, low current (transformer primary) circuit to produce a welding current at a frequency lower than that of the supply. THREE-PHASE LOAD DISTRIBUTION A load distribution resistance welding machine employs a plurality of RESISTANCE WELDING MACHINE transformers, which
31、may be energized simultaneously or in sequence from a poly phase source. A resistance welding rectifier machine employs rectification from a three-phase power source (usually solid state) in the low voltage, high current (transformers secondary) output welding circuit. The distance from the center l
32、ine of the electrodes or platens to the nearest point of interference for flat sheets in a resistance welding machine. In the case of a resistance seam welding machine with a univeisal head, the throat depth is measured with the machine arranged for transverse welding. The unobstructed dimension bet
33、ween arms, when applying pressure, throughout the throat depth in a resistance welding machine. THREE-PHASE RESISTANCE WELDING RECTIFIER MACHINE THROAT DEPTH THROAT HEIGHT STD-RWMA BULL 16-ENGL 177b m 7678558 0000729 338 m BULLETIN 16 Page 1-14 I Supedes JUN 84 I RESISTANCE WELDER MANUFACTURERS ASSO
34、CIATION 1.1 .O STANDARD NOMENCLATURE AS USED IN RESISTANCE WELDING PRACTICES* (continued) TIPS TRANSFORMER PAD UNIVERSAL HORN Slang term for replaceable electrodes used in spot welding; held in place by electrode holder. That portion on a resistance welding transformer which is the termination of th
35、e secondary and is typically the connection point to secondary circuit of a resistance welder. A horn making possible two or more angular positions of the electrode holder. UNIVERSAL WELDING HEAD A welding head readily adaptable to both circumferential and longitudinal seam welding. UPSET FORCE, NOM
36、INAL In flash and upset welding, the force exerted at the welding surfaces during upsetting. VOLTAGE ADJUSTMENT The range of open circuit secondary voltage provided in a welding machine by predetermined means, such as a phase shift voltage control andlor voltage taps on the transformer windings. STD
37、-RWMA BULL Lb-ENGL 177b 7b78558 0000925 274 W BULLETIN 16 Page 1-2-1 Supersedes JUN 84 RESISTANCE WELDER MANUFACTURERS ASSOCIATION 1.2.0 ROCKER ARM TYPE SPOT WELDER STANDARDS 1.2.1 ROCKER ARM SPOT WELDER SIZE STANDARDS I I K $ J a 1 Z I z 0 n e -I I F z s I “ /a i? .- E a, a (II = O (II 3 U - 5 .- I
38、 U a, Q Q a in O z .- - c O O $3 U IY O O O W * tY O O # O W d tY O O m N O O o N IN IN F x STD-RUMA BULL Lb-ENGL L77b W 7b78558 000072b LOO W WELDER SIZE O00 O0 O 1 2 BULLETIN 16 Page 1-2-2 Supersedes JUN 84 PART NUMBER OF CIRCUITS Electrodes 1 Electrodes 1 Electrodes 1 Electrodes TANDARD RAM STROK
39、E m VELDER SIZE O00 O0 HORN DIA IN I MM _-_ TYPE DIA RWMA TAPER NUMBER LENGTH UPPER IN / MM LOWER IN / MM IN I MM IN / MM 11 25.4 PROJECTION PROJECTION 1 SOI 38.1 .750/ 19.05 4 81 203.2 81 203.2 2/ 50.8 RO:ION PROJECTIOh O 2.001 50.8 1 .o01 25.4 4 81 203.2 81 203.2 31 76.2 5 81 203.2 121 304.8 31 76
40、.2 2.501 63.5 1.251 31.75 PROJECTIOh 1 SPOT PROJECTIOb 3.001 76.2 1 SOI 38.1 81 203.2 12/ 304.8 31 76.2 5-7 k PROJECTIOb 3.501 88.9 1 SOI 38.1 81 203.2 121 304.8 41 101.6 7 SPECIAL 4 41 101.6 BULLETIN 16 Page 134 lJANo Supetsedes JUN 84 1 RESISTANCE WELDER MANUFACTURERS ASSOCIATION 1.3.5 ACCESSORIES
41、 A. Air Operation All welders designed for air power operation shall be supplied with the following accessories: 1. Air line filter 2. Air pressure regulator with gage 3. Lubricator 4. Air speed control valves or air cushions B. Hydraulic Operation Hydraulically operated welders shall be provided wi
42、th pressure regulator with pressure gauge with protective snubber. 1.3.6 ELECTRICAL CHARACTERISTICS A. Transformer Primary Voltage and Frequency All welders shall operate on 230 or 460 volts, 60 Hertz single phase (Not dual voltage) B. Transformer - Secondary Voltage Adjustment The voltage adjustmen
43、t shall provide taps to limit the reduction of secondary voltage from one tap to the next lower tap to 15%. The tapping shall provide a minimum open circuit voltage not exceeding 65% of maximum voltage. C. Initiating Control The nominal voltage on any hand, foot, or spring loaded initiating switch s
44、hall be 120 volts or less. D. Short Circuit Currents i. For short circuit currents, see Table 1.3.4. 2. Spot Welders Determination of welder output as required in 1.7.9 of Electrical Standards for Resistance Welding Equipment shall consist of substituting a copper rod of the same diameter as the ele
45、ctrode holders in place of the holders and to adjust the vertical clearance between the inner surfaces of the horns to 8“ (203.2 MM) for sizes 1, 2, 3, and 3“ (76.2 MM) for sizes 000, 00, and O. 3. Projection Welders Determination of welder output as required in 1.7.9 of Electrical Standards for Res
46、istance Welding Equipment shall consist of a copper bar in accordance Table 1.3.3 machined flat on each side and placed between the welder platens at the center of the platens. STD-RUMA BULL Lb-ENGL L77b m 7b78558 0000934 287 m WELDER SIZE O0 000 RESISTANCE WELDER MANUFACTURERS ASSOCIATION 1.3.6 ELE
47、CTRICAL CHARACTERISTICS (continued) D. Short Circuit Currents BAR SIZE (38.1 MM DIA X 76.2 MM LG.) 1-112” DIA X 3” LG. BULLETIN 16 Page 135 Supersedes JUN O 1 2 TABLE 1.3.3 SHORTING BAR SIZE FOR PRESS TYPE SPOT AND PROJECTION WELDER SHORT CIRCUIT CURRENT TEST 3” DIA X 8” LG. (76.2 MM DIA X 203.2 MM
48、LG.) I I I 3 4 1.3.7 OPTIONAL FEATURES A. Mechanical Features 1. 2. 3. 4. 5. 6. 7. 8. 9. 1 o. 11. 12. 13. 14. 15. Combination Spot and Projection Welding Machine setup which combines horns, electrode holders, and electrodes with platens and which may include vertical slide type lower horn holder or
49、column type lower horn holder. Hom for angle type mounting of spot welding electrode holder 22-1/2 degrees forward from vertical. Hom for Universal type mounting of spot welding electrode holder 22-1/2 degrees forward from vertical one end, other end vertical. Water cooled homs Additional vertical adjustment of lower platen or horn holder Special tooling such as special electrodes, nests, fixtures, etc. Lower hom brace Adjustable stroke air cylinder Adjustable-retractable stroke air cylinder with manual or solenoid valve control Air lock, rubber, spring, or
