1、.- 1 NIL-W-OL34A 34 m 7777706 0254453 7 m MILITAKY SPECIFICATION MIL+-801348 19 December 1975 SUPERSEDING MIL+ -80134 16 October 1967 * WELDING MACHINES, ARC, DC TRANSFORMER-RECTIFIER, CONSTANT CURRENT, RESISIDR CONTROLLED This specification is approved for use by all Departments and Agencies of the
2、 Department of Defense. 1.1 Scope. This specification cuvers direct current, transformer- rectifier, constant current welding machines with and without gas, water, and high frequency controls, and with manual or motorized resistor type current controls for single operator use. * 1.2 Classification.
3、This specification covers welding machines of The type and size supplied shall be the following types and sizes. as specified (see 6.2.1). 5Pe 1 - Basic Machine, without Gas, High Frequency, Water, and Motorized Current Controls Size 200 - 200 amperes Size 300 - 300 amperes Size 400 - 400 amperes wp
4、e II - Basic Machine, with Gas, High Frequency, Water, and Motorized Current Controls Size 300 - 300 amperes 2. APPLICABLE DOCUMENTS c 2.1 Military publications. The following documents of the issue in effect on date of invitation for bids or request for proposal form a part of the specification to
5、the extent specified herein. THIS DOCUMENT CONTAINS PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-WiOL34A 34 7339906 025LI454 7 MIL4-80134A SPECLFICATION MIL-W-45562 Welding and Soldering Equipment, Supplies and Accessories, Packaging o
6、f STANDARD MIL-STD-130 Identification Marking of U.S. Military Property (Copies of specifications, standards, drawings, and publications required by suppl5ers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer .)
7、 * 2.2 Other publications. The following documents form a part of thib specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for pro- posal shall apply. NATIONAL BUREAU OF STANDARDS (NBS) Handbook H-28 - Screw-Thread S
8、tandards for Federal Services OCCUPATIONAL SAFETY AND HEALTH ACT (OSHA) OF 1970 Title 29, Code of Federal Regulations, Chapter XVII, Health Administration Part 1910, and amendments Standards Occupational Safety and (Application for copies should be addressed to the Superintendent of Documents, Gover
9、nment Printing Office, Washington, DC 20402 .) NATIONAL ELECTRICAL MANUFACTRERS ASSOCIATION (NEMA) STANDARDS EW-1 Electric Arc Welding Apparatus (Application for copies should be addressed to the National Elec- trical Manufacturers Association, 155 East 44th Street, New York, NY 10017 .) AMERICAN GE
10、AR MANUFACTURERS ASSOCIATION (AGMA) AGMA 360 - Manual for Machine Tool Gearing (Application for copies should be addressed to the American Gear Manufacturers Association, 1330 Massachusetts Ave., NW, Washington, DC 20005 .) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted witho
11、ut license from IHS-,-,- -. MIL-W-AOL34A 34 m 7779706 0254455 O m MIL-W-8013414 (Technical society and technical association standards and specifi- cations are generally available for reference from libraries. also distributed among technical groups and using Federal agencies.) They are 3. REQUIREME
12、NTS * 3.1 First Article approval. If First Article approval is required (see 6.2.1 and 6.3), inspection therefor shall be in accordance with Section 4. A First Article comprises a preproduction model or initial production sample; approval involves testing and evaluating the First Article for conform
13、ance with the requirements herein before, or in the initial stage of, production under a contract. The approved sample shall be used as the standard for all production items manufactured to fulfill the terms of the contract. * 3.2 Design. The welding machine shall be a completely assembled and en- c
14、losed, direct current, transformer-rectifier, constant current, resistor controlled type for single operator use from three phase power. welding machine shall be designed and.built to withstand the rough treat- ment encountered around construction work. The frame shall be an all welded steel assembl
15、y. weather conditions and shall be forced air cooled. Design of the machine shall permit stacking of machines up to three high. All parts subject to wear or replacement shall be easily accessible for adjustments, replace- ment, and repair. Unless otherwise specified herein, the welding machine shall
16、 be in accordance with the requirements specified in NEMA EM-1 for machine shall be as low as is consistent with economical sound design. The The machine shall be designed for outdoor all- . transformer-rectifier welding machines. The center of gravity of the 3.2.1 Power supply, The welding machines
17、 shall be designed to operate from a three phase, 60 Hz, 230/460 volt primary power supply. otherwise specified (see 6.2.1), the welding machines shall be connected for operation from 460 volt power supply prior to shipment. Unless * 3.2.2 Safety and health requirements. Covers or other safety devic
18、es shall be provided for all parts of the machine presenting safety hazards which can be guarded without substantial interference to operation of the machine. All guards shall provide easy access to guarded parts. Except as otherwise specified by the procuring activity, the machine shall comply with
19、 the standards promulgated under OSHA applicable to the machine manufacturer. Exceptions and additional requirements for safety and health shall be as specified (see 6.2.1 and 6.4). 3.2.3 Lubrication. All bearings (except sealed-for-life) and other working parts requiring lubrication shall be provid
20、ed with means for lubrication. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-134A 3Li W 7779706 025LiLi56 2 MIL-W -80 13 4A * 3.2.4 Interchangeability. To provide for replacement of worn parts, all parts shall be manufactured to definite di
21、mensions and tolerances .which will permit installation of replacement parts without modifica- tion of part or machine. * 3.2.5 Materials. Materials shall be as specified herein. Materials not specified herein shall be selected by the manufacturer to meet the requirements of this specification. Only
22、 new materials shall be used, Contact between dissimilar metals, especially brass, -copper, or steel in contact with aluminum or magnesium shall be avoided whenever possible, Materials shall be free of all defects and imperfections that might affect the serviceability and appearance of the- finished
23、 product. * 3.2.6 Portability. The welding machines shall be portable and shall be base mounted. Running gear, if required (see 6.2.1), shall be specified by procuring activity. The welding machines shall be provided with lugs or lifting eyes or other suitable means for handling by crane or hoist. E
24、ach eye or lug when mounted on the machine shall be capable of support- ing two and one-half times the weight of the machine. The welding machines shall also be designed to be lifted by forklift truck. 3.3 Construction. The welding machines shall be constructed so that when installed and connected t
25、o the specified power source, they can be used for any purpose for which they were designed. The welding machines shall be constructed of parts which are sound in structure and free from any repair. 3.3.1 Castings and forginps. All castings and forgings shall be free from defects, scale, and mismatc
26、hing. In no event shall such processes as welding, peening, plugging, or filling with solder or metallic paste be used on castings or forgings to reclaim any defective parts for use on the machines. 3.3.2 Welding, brazing, and soldering. Welding, brazing, or soldering shall be employed only where th
27、ose operations are required in the origi- nal design. These operations shall not be employed as repair measures for defective parts, 3.3.3 Fas tening devices. All screws , pins, bolts, and similar parts shall be installed with means for preventing loss of tightness. Such parts subject to removal or
28、adjustment shall not be swaged, peened, staked, or otherwise permanently deformed. 3.3.4 Surfaces. All surfaces of castings , forgings, molded parts, stamping, and welding parts shall be cleaned and free from sand, dirt, fins, sprues, scale, flux, and other harmful or extraneous materials. External
29、surfaces shall be smooth and all edges shall be either rounded or beveled unless sharpness is required to perform a necessary function. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-80134A 34 7777706 0254457 4 m MIL -W -80 134A 3.3.5 Painti
30、ng. Unless otherwise specified (see 6.2.1), the welding machines shall be painted in accordance with the manufacturers stan- dard coimercial practice. * 3.3.6 Threads. All threaded parts shall conform to Handbook H28. * 3.3.7 Gears, All gears used in the machine and its components shall conform to t
31、he applicable requirements of AGMA 360. * 3.3.8 Weight and dimensions. The weight of the welding machines shall not exceed 400 pounds (181.6 kg) each. The dimensions of the welding machines shall not exceed 24 x 20 x 32 inches (60.9 x 50.8 x 81.2 cm) in height, width, and depth for Type I welding ma
32、chines; and 32 x 30 x 45 inches (81.2 x 76.2 x 114.3 cm) (HWD) for Type II welding machines. * 3.4 Performance. The welding machines shall have arc stability charac- teristics which will enable an operator to maintain a stable arc and produce sound welds when current is qdjusted within the welding r
33、ange of the machine. The open circuit voltage shall be in accordance with NEMA EW-1. The welding machines shall have a power factor of 90% or better. The time delay response of the welding machine shall be in- stantaneous and linear to high current values. Type II welding machines in addition to the
34、 above shall have gas, water and high frequency controls to initiate the gas flow prior to establishing the arc; to control time delay cutoff of gas following breaking of the arc; and to superimpose high frequency for starting the arc or for continuous use. The welding power range of the welding mac
35、hines shall be from not more than 5 amperes (at 20 load volts) to not less than 200 amperes (at 25 load volts) for 200 size; 300 amperes (at 32 load volts) for 300 size; and 400 (at 36 load volts) for 400 size. * 3.4.1 WeldinP current adjustment. The welding current shall be adjust- able from minimu
36、m welding current to maximum current in one ampere increments. Current adj,ustments for Type II welding machines shall be operated by reversible motors. 3.4.2 Temperature rise. The maximum allowable temperature rise of various parts of the machine for tha given class of insulation used shall be in a
37、ccordance with NEMA EM-1. 4 * 3.5 Components. The welding machine shall basically consist of, but not be limited to, the following components : enclosure, transformer, - rectifier, controls, and cooling system. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
38、om IHS-,-,-MIL-W -801346 3.5.1 Enclosure. not less than 18 gauge (1.26 mu) metal, reinforced to give adequate support and protection to meet requirements specified herein. The enclosure shall be designed and constructed to prevent liquid or solid particles, falling on the enclosure at angles up to 1
39、5 degrees from the vertical, from interfering with the satisfactory operation of the equipment. The enclosure shall have panels or removable sections to furnish access to all internal parts. Ventilation openings shall be provided. The enclosure shall be a dripproof cabinet made of * 3.5.2 Transforme
40、r. The welding transformer shall be designed to draw a balanced three phase load from the input line. secondary coils shall be insulated from each other. transformer coils shall be Class B, F, or Hmaterial in accordance with requirements of NEMA EW-1. Insulation distances and clearances shall be as
41、liberal as is economically practicable in order to minimizethe The transformer shall be rigidly mounted to the frame within the enclosure. The primary and Insulation o5 the . need for frequent cleaning. 3.5.3 Rectifier. Rectification shall be accomplished by silicon diodes of suitable size and desig
42、n for the intended service. The silicon diodes shall be mounted on metal plates which serve as heat sinks and radiators. The tempera- ture rise of a silicon rectifier assembly shall not exceed 110 degrees C above a 40 degrees C ambient temperature. The rectifier shall be a three phase full wave type
43、. 3.5.4 Controls. The output current controls shall be designed to give an instantaneous response necessary to produce a stable arc. rent controls shall be capable of furnishing any current setting within the minimum to the maximum current range of the machine. machine shall have an off-on circuit b
44、reaker. The current controls shall be located within the enclosure in the cooling air stream. The cur- The welding 3.5.4.1 Typ e I controls. current controls. The Type I welding machine shall have manual * 3.5.4.2 Typ e II controls. The Type II welding machine shall have motorized stepless current c
45、ontrols. The output current shall be auto- matically controlled by full range rheostat elements in the secondary welding output. and water controls. versible gear motors. adjustments for raising and lowering of the welding current. rate of speed of the motors shall be variable from 5 seconds to 60 s
46、econds for full welding range at: any setting of the machine. The welding machine shall have a polarity switch for straight and reverse polarity and a remote current control receptacle. The welding machine shall have high frequency, gas, The welding machine shall have separate speed The motorized co
47、ntrols shall be driven by re- The . 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-OL3qA 34 9999906 0254459 MIL-W-80134A 3.5.5 .Cooling system. The welding machines shall have a fan, driven by a brushless, totally enclosed motor, for forced
48、air cooling. Location of the fan in the welding machines shall be such as to cause the necessary flow of air to cool the transformer, rectifier, and current controls. 3.5.6 Voltmeter and ammeter. When required, a voltmeter and ammeter shall be mounted on the control panel (see 6.2.1). 3.6 Diagram of
49、 connections. A diagram of electrical connectiohs shall be attached to the inside of the welding machines and shall be coated with transparent varnish or a plastic covering. 3.7 Nameplate. Unless otherwise specified (see 6.2.1), a corrosion resistant metal nameplate marked in accordance with MIL-STD-130 shall be securely attached to each.machine. information listed below. If the machine is a special model, the model designation shall include the model
