1、MIL-T-7716 3g M 7777706 02L13777 7 W FI- -., L . =T-9916 (USA?) 29 June 1961 , THRFADING MACHINE: PIPE A.ND BOLT, POWER DRNEN, BENCH AID FLOOR TYPE 1. SCOPE 1.1 Scope.- This specification covers machines for threading pipe, tubing, nipples and bolts; also includes attachments for cutoff and reaming,
2、 where applicable, They are either of the bench or floor type and are electricinctor-driven. consist of the slatlonary die-head style for holding the work in a revolving, gripping chuck. The machines 1.2 Classification. 1.2.1 Types, classes, and sizes.- The combbation pipe and bolt machines covered
3、by this specification shall be of the following types, elfissea, and sizes aa specified in the invitation for bids, contract, or order (he 6.2): Typ I.- Bench. Class 2*i Heavy duty. Size 1.- Threading range (min). Bolt = 3/4 inch to 2 inches. Pip - 1/8 inch to 2 iilcbes. Type II.- Floor. Class 1.- L
4、ight duty. Size 1.- Threading range (mid. Pipa - 1 inch to 4 incnee. Bolt - 3/8 inch to 2 inches, Class 2.- Heavy duty. Size 1.- Threading rango I (mh) . Pipe - 1 inch to 4 inches. Bolt - 3/8 inch to 2 inches, Size 2.- Threading range (min). Pipe - 1 inch to 6 inches. Bolt - 1 inch to 4 inches. Prov
5、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_, I. MIL-T-97Lb 3LI W 9977906 024LIOOO 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invitation for bid, form a part of this specification to the extent specified h
6、erein: SPECIFICATIOPG Federal CC-M-6LJ Wtora, Alternating-Current, integral Horsepower Military MIL-P-4574 Preparation for Storage and Shipment of Government Owned (USAF) industrial Reserve Equipment and Military Support Items MILS-11748 Suppression Requirements for Electrical and Electronic Equipni
7、ent STANDARDS Mil-std-129 Marking for Shipment and Storage MilSta-130 Identification Mmking of U. S. Military Property standards , drawings , and publicat ions (Copies of specifications required contractor8 in connoction with specific procurement functions should be obtained from the procuring activ
8、ity or as directed by the contracting officer) . 2.2 Other publicationa.- The following documents form a part of this specification to the extent specified herein. the issue in effect on date of invitation for bids shall apply. Unless otherwise indicated, btionai Bureau of Standards Handbook H28 Scr
9、ew-Thread Standards for Federal Services (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Nashington 25, D. C.). National Electrical Manufacturerst Association Standards Cl-1959 Motors and Generators (Application for copies shoilild be Manuf
10、acturers 1 Association, 55E. 44th addressed to National Electrical Street;, NSW York 17, New York). . - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- -e MIL-T-991b 34 = 9797906 0244001 T American Standards Association B36.10 WroughtSteel and Wroug
11、ht-Ikon Pipe (Application for copies should be addressed to American Standards Association, 10 East 40th Street, New York 16, New York). Underwriters Laboratories, Inc. Publication Standards on Rubber-Covered Wire (Copies of Underwriters Laboratories, Inc., standards may be obtained from the Underwr
12、iters New York 13, N.Y.; 207 East Ohio Street, Chicago 11, 111.; or 500 Sansome Street, San Francisco 11, California. ) Laboratories, Inc. , 161 Sixth Avenue, National Yacbine Tool Builders Association Standards Machine Tool Electrical Standards (Copies of KCBA Electrical Standards niay be obtained
13、From the Nationa Machine Tool Builders Association, 2139 Wisconsin Avenue, N.W., Washington 7, D. C.). 3.1 Preproduction Sample.- The contractor shall furnish a complete threading =chine for preproduction inspection and test in accordance with 4.3. The sample may be a preproduction item or if the co
14、ntractor has a production item which mets the requirements of this specification, a sample may be taken from stock. In either case, the sample shall be identical with the proposed items and shall be made or shall have been made and assembled by the same methods that are to be used or were used in pr
15、oduction of item to fulfffl the terms of the contract. One preproduction sample shall be furnshed and the approved sample shall be used as the production standard, shall not relieve the contractor of the responsibility to furnish equip- ment in emordance with the requirements of this specification.
16、Approval of a preproduction sample 3.2 Design The niachines covered by this specification are to be used in threading pipes and bolts. The machine shall consist of a headstock assembly, carriage assembly and base. electric motor driven spindle and pipe holding devices. shall contain the diehead and
17、the dies for threading. support the headstock assembly and carriage assembly. The headstock shall contain the The carriage The base shall 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-99Ib 39 7797906 0299002 I Type I II II II MIE.T- 99C-(l!
18、S,ir) 3.2.1 Accuracy.- The machine and dies shall be capable of cutting threads conforming to the following. Class 2 1 2 2 3.2.1.1 threads conformjng to the requirements of Handbook H28 - Screw-Thread Standards for Federal Service. The machine shall be capable of meeting this requirement throughout
19、its entire operating range. Pipe.- The niachine shall be capsble of cutting pipe Threading Perf ormance Pipe Tlme size (i4aximum) Inches Seconds 2 25 4 56 4 35 6 70 3.2.1.2 Bolts.- The machine shall be capable of cutting class IA or better American National coarse threads series conforming to Handbo
20、ok fI28 - Screw-Thread Standards for Federal Service. The machine shall be capable of meeting this requirement throughout its entke operating range. Motor (inimm) Horsepower 1/2 3 5 7-1/2 3.2.2 Left and right hand threads.- The machine shall te capable of niachining right and left hand threads throu
21、ghout its operating range. 3.2.3 Types.- Type I machines.are bench mounted. Type II machines are floor mounted. 3.2.4 Classes.- Class I niachines are for lightduty threading and class II for heavy duty. TABLE I PIPE AND BOLT THEEADING MACHINES - Size - 1 1 1 2 - - Bolt 8 iZ6 (n?inirmzm range ) Inche
22、s 1/44 3/8-2 3/8-2 1-4 4 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-99Lb 3Li m 9999906 02i-14003 3 H 3.2.5 Safety Devices.- The machine shall be fitted with safety devices for covering all parts that present safety hazards. devices shall
23、 include guards for belts, pulleys, chains, gears, guide ways, sprockets, etc. All guards shall be of the removable or adjustable type to provide for access to the machine part. All electrical equipment shall be grounded to eliminate the possibility of electrical shock under norm1 operation. The 3.2
24、.6 Lubrication.- Ail bearings, revolving shafts and other rotating or sliding parts shall be provided with means for lubrication. Manually operated system for ways and remote areas shall have control handles mounted in an accessible location. U1 oil holes and grease fittings shall be accessible. 3.2
25、.7 Interchangeability.- All replaceable parts shall be constructed to definite standards, tolerances, and clearances in order that any such part of a particular manuficturers type or model may be replaced or adjusted without requiring modification. 3.3 or defects which may render the machine inopera
26、ble. The machine and its equipment shall be complete so that when installed and connected to the specified source of power it can be used for any operation for which it was designed. Construction.- Construction shall be free from any characteristics 3.3.1 hard spots, shrinkage defects, cracks or oth
27、er injurious defects. in no event shall such processes as welding, plugging or peening be used for reclaiming faulty or weak castings. Castings.- All castings shall be free from blow holes, porosity, 3.3.2 gelding.- The joining surfaces of all parts to be welded shall be thoroughly cleaned of all fo
28、reign matter such as dust, scale, paint and grease. Where harmful stresses may result from welding, the welded parts shall be annealed sufficiently to remove the stresses. All welds shall be cleaned of scale and oxidation products, and excess flux shall be chemically neutralized and renoved. shall p
29、roduce a weld having chemical and physical properties similar to those of the parent metal. Electrodes used in arc welding 3.3.3 Fastening devices.- All screws, pins, bolts, and similar parts shall be installed with neans for adjustment. subject to removal or adjustnient shall not be swaged, peened,
30、 staked, or otherwise permanently delormed. 811 such parts when 3.3.4 Surface Finish.- All castings, forgings, molded or welded parts, shall be thoroughly cleaned and free from sand, dirt, fins, sprues, scale, flux or other harmful or extraneous materials. External surfaces between mitching parts sh
31、all be precision finished by mchining, grinding, or scraping to provide the necessary.9rnces . 5 t Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. .- MIL-T-77Lb 39 9977706 0299004 5 M MIL-T- 9916(USAF) 3.3.5 PaFntFng.- Unless otherwise specified th
32、e machine shall be painted in accordance with the manufacturer!s standard commercial practice. (See 6.2). 3.3.6 Threads.- a11 threads shall be in accordance with National Bureau of Standards Handbook H28. 3.3.7 Electrical connections.- Electrical connections shall be in accordance with WEA Wiring St
33、andards. 3.4 Component parts.- The niachine shall. be composed of the components listed below. 3.4.1 Base or bed.- The base or bed shall be made of metal, either cast or fabricated, and shall be rigid and of sufficient strength to support the stresses developed in the application of its intended use
34、, The ways shall be of the renewable type securely mounted to the base, or be an integral part of the base properly finished with other maris for adjustment to obtain proper alignment. 3.4.2 Carriage.- The carriage shall be made of metal, either cast or fabricated, and shall be rigid in construction
35、. mounted on the ways of the base and be free to mve along the ways in either direction from the headstock by manual operation. siiall be such that it supports the die-head and facilitates chaaging of die-heads. facilitate cutting nipples. It shall be Its design The carriage shall be fitted with a l
36、ength gage to 3.4.3 Headstock, spinle, and chuck.- The headstock and spindle shall be made of metal and chai1 be rigid with siifficient strength to support the stresses developed in the fmction of its intended use. The bearing supporting the spindle shall be adequate to take radial and thrust loads.
37、 shall be equipped with a wrenchloss, self-centering chuck. forward end of the spindle on type II machines sbtlll be equipped with a self-centering chuck. a self-centering chuck or other device mounted on the rear end of the spindle for holding long pipes or bolts. The spindle shall be driven by the
38、 electric motor through a transniission unit at speeds applicable to the size of machine specified in the bvitation to bid, contract, or order. The fordard end of the spindle on type. I machines The . Both type I and type II mchines shall have 3.4.4 spindle at the speeds required for the rriachining
39、 operation applicabie to the range of sizes for machine specified. The transmission unit may consist of gears and vee belt or chain drlm, or any combination thereof. Where gear or chain drive is used, an adequate lubrication system shall be applied and gears shall be totally enclosed. R.ansmission u
40、nit.- The transmission unit s;dl drive the Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.- I . MIL-T-97Lb 3Li = 7997706 02Liq005 3 3.4.5 the die-head, cutting off and reaming tools vhel: in operation. pu;rp my be driven by an individual motor or b
41、y ibg transmission unit. Valves shall be located on the machine convenient to the operator. The pm1p shall te mounted in the hse of the machine with a screened coolant reservoir, Coolant system.- The coolant system shell supply coolant to The 3.4.6 Die-head.- The die-head shall be mounted on the fra
42、me of the carriage and Oe provided with necessary mans for alignment and be held securely in position for its intended use. furnished shall be applicable to the range of sizes required for the machins specified by the procuring agency. Thcy shall be quick- opening type with opening and closing movem
43、ents controlled manually by the operator with adequate adjustment of dies for over-and under- size threads. The die-heads 3.4.6.1 Die or chaser.- The die or chaser shall be assembled with the die-head and be held securely in position for machining threads to sizes within range of machine specified.
44、The dies may be either of the radial or tangential type. be high-speed steel heat-treated to a Rockwell hardness of C 60 to 65. Each machine shall be furnished with one complete set of right hand dies or chasers in the An?erican National cozrse thread (NC) series and. one complet.i! set of right han
45、d dies or chasers in the American National pipe tt:read (NTP) series. threads in the sizes listed in Handbook H28 - Screw-Thread Standards for Federal Service, throughout the range of the machine as specified in table I. Xes and chasers other than those specified above shall IE available at the opti
46、on of the procuring agency and as specified in the contract or order (See 6.2). 14achine dies or chsers shall The dies furnished shall cut 3.4.7 centerirg and capable of cutting off pipe to specified length within limits of nachine specified by procuring agency. Cu+,of tool and attschment.- The cuto
47、ff tool shall be self- 3.4.8 Reamer.- A reamer or cutter shall be furnished for the purpose of reaming pipe within limits of inachine specified by procuring agency . 3.4.9 NipTle holders and afkptvr.- A nipple holer end set of adapters for threading right hand NFT nipples and Nz studs throughout the
48、 range of the machine shall be furnished. 3.4.10 Stand.- Unless otherwise spcSied type I nachines shall be furnished with a hrrcw stand having two rubber tire wheels of not less than 12 inches in dimeter. The stand shall have an enclosed tool tray for the storage cf accessories (See 6.2). Provided b
49、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.5 Electrical requirements (See 6.2). 3.5.1 Type I. 3.5.1.1 Drive notor.-Unless otherwise specified the drive motor shall be not less than the horsepower specified in table I. motor shall be of the universal, reversible, variable speed typs. The motor shall have antifkiction bearings conforning to FF-B-l or FF-B-186 (See 6.2). The
