ARMY MIL-B-50378-1970 BARRELS TEST SMALL ARMS AMMUNITION GENERAL SPECIFICATION FOR《一般规格的轻型武器弹药测试导火管》.pdf

1、MIL-B-5037 13 777790b 0326846 3 .- .jf . 5-37 -09 MIL-B-50378 (W) 29 January 1970 MILITARY SPECIFICATION R4RRELS, TEST, SMALL ARMS AMMUNITION GENERAL SPECIFICATION FOR 1. SCOPE 1.1 This specification covers general requirements for test barrels used for proof testing of small arms ammunition. 2. APP

2、LICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of in- vitation for bids or request for proposal form a part of the specification to the extent specified herein. STANDARDS Federal Federal Test Method Standard No. 151 - Metals: Test Method Mi 1 it ary MIL-STD-109 MIL-STD-

3、129 - Quality Assurance Terns and - Definitions Marking for Shipment and Storage (Copies of specifications, standards, drawings and publications required. by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting o

4、fficer . ) 3. REQUIXEMENTS 3.1 Material - Material shall.be in accordance with the applicable barrel drawing. 3.2 Surface Finish - The surfaces shall be finished to the require- ments indicated by symbols on the applicable barrel drawing. 3.3 Hardness - Hardness shall be in Fccordance with the appli

5、cable ban el drawing 3.4 Physical Properties - Phys.ical properties required by the draw- ing shall be uniform throughout each barrel within specified tolerances. Physical properties shall be achieved by quenching and tempering. FSC 1305 THIS DOCUMENT CONTAINS PAGES.- Provided by IHSNot for ResaleNo

6、 reproduction or networking permitted without license from IHS-,-,-MIL-B-50378 13 9979706 0326847 5 MIL-B-50378 (MU) 3.5 Protective Finsh - Progective finish shall be in accLcdance with the applicable barrel drawing and referenced specification ind shall apply to exterior only. 3.6 Dimensional Requi

7、rements - Barrels shall comply with the dimen- sional requirements specified on the applicable drawing, (see 6.2 and 6.3). 3.7 Riflinp ?hist Deviation - Unless otherwise specifiec, lead of rifling shall not vary beyond 2 1/2 percent (2%). 3.8 Bore Condition - Edges of lands shall be sharp end f-ee f

8、rom burrs. 3.9 Marking Requirements - Marking shall include the manufacturers Marking shall be produced by impression stamping, engraving, etch- name or identification symbol, year of manufacture, part number and serial number. ing, or other approved means. The marking shall be permanent, legible an

9、d logically grouped. 3.10 Workmanshie - The workmanship shall be of the highest quality con- sistent with the tolerances and finishes specified. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection - Unless otherwise specified in the contract or purchase order, the supplier is responsib

10、le for the perfor- mance of all inspection requirements as specified herein. Except as other- wise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection require- ments specified herein, unless disapproved by the Govern

11、ment. “he Govern- ment reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necess.ry to assure supplies and services conform to prescribed requirements. 4.1.1 Quality Assurance Terms and Definitions - Refe-ence shall be made to MIL-ST

12、D-109 to define quality assurance terms used. 4.1.2 Inspection - inspection shall be in accordance with referenced documents and as specified herein. 4.2 Inspection Provisions 4.2.1 Submission of Product - Barrels shall be submitted for accept- ance, either at destination or the contractors facility

13、 as required by the contract. 4.2.2 Examination 4.2.2.1 Dimensions - Each barrel shall be measured for all dimensions specified on the applicable barrel drawing. shall be rejected. All non-conforming material 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from

14、 IHS-,-,-MIL-B-50378 (MU) MIL-E-5037 13 = 777770b 032b848 7 U 4.2.2.1.1 Riflinq - The diameters of the lands and grooves shall Le These measurements shall be made at measured using an approved air gage. one inch (i“) intervals for each pair of lands and each pair of grooves. These diameters shall be

15、 recorded on thestatement of findings for each barrel. 4.2.2.1.2 Chamber Contour - Chamber cast of “cerrolow 117“ or eqwl may be nade of barrels for determining dimensional requirements. 4.2.2.2 Workmanship snd Condition - Each barrel shall be examined Visually for satisfactory appearance of protect

16、ive finish and for seams, cracks, nicks, scratches, rust spots and other defects which may materially affect the useability of the barrel. using an approved borescope. marks or any irregularities. with 4.4, Rifling shall be visually inspected Rifling shall not have any scratches, tool All non-confor

17、ming material shall be rejected. 4.2.3 Tests - The following tests shall be performed in accordance 4.2,3.1 Surface Finish - Each barrel shall be tested for surface finish. All non-conforming material shall be rejected. 4.2.3.2 Rardness - Barrels shall be tested for hardness. Fafalure of any barrel

18、to comply with the hardness requirements of the applicatle drawing shall be cause for rejection. I 4.2.3.4 Tension Test A minhum of two tensile specimens from ?ach lot of barrels shall be tested for mechanical properties indicated on the applicable barrel drawing -.and certification of results shall

19、 be furrished. Failure of anyspecimen to comply with drawing requirements shall be c.use for rejection of the lot of barrels. 4.2.4 Statement of Findings - A statement of findings shall be sub- mitted for each lot of barrels presented to the Government for accqtance. Each statement shall include the

20、 following data: a. b. C. d. e. f. h. Purchase order or contract number. Item nomenclature and part number. Applicable drawings and specifications used for inspection. Method of inspection. Authorized deviations, if any. A statement of findings shall cover each barrel presented for acceptance. State

21、ment that inspection has been conducted in accordance with above criteria and that items have been found to conform with all requirements. Signature of a responsible officer of the contractor. 4.2.5 Government Inspection and Acceptance - Barreis will be accepted 3 Provided by IHSNot for ResaleNo rep

22、roduction or networking permitted without license from IHS-,-,-NIL-B-50378 13 i 7Ob 03268Y7 7 m MIL-B-50378 (MU based on an acceptable statement of findings. may conduct Independent inspection to verify contractor f indings. inspections shall be made at destination and non-conforming barrels shall b

23、e rejected and returned to the contractor, Such barrels may be reworked and resubmitted for acceptance. The Goverment, however, Such 4,2,6 Measuring and Test Equipment - The contractor shall provide and maintain measuring and test devices necessary to assure that barrels conform to technical require

24、ments, in order to assure continued accuracy, these devices shall be calibrated at established intervals against Cer- tified standards which have known valid relationships to national standards. &en required, the contractorts measuring and test equipment shall be made available for use by the Govern

25、ment to determine conformance of product with contract requirements in addition, if conditions warrant, contractors personnel shall be available for operation of such devices and for verifi- . cation of their accuracy and condition. 4.3 Test Methods and Procedures 4.3.1 Surface Finish Test - The act

26、ual surface roughness shall be determined by measurement or by comparison of the surface to an acceptable standard reference surface. 4.3.2 Rardness - A hardness testing machine shall be used for deter- mining the hardness values specified on the applicable drawing, prescribed by Federal Test Nethod

27、 Standard No. 151, 4.3.3 Tension - The criteria for performing this test shall be as 5. PREPARATION FOR DEXIVERY 5.1 Preservation and Packaging - Barrels shall be preserved and pack- aged in accordance with the manufacturers commercial practice. 5.2 Markinq - Unit packages and shipping containers sh

28、all be marked in accordance with the requirements of MIL-STD-129. Ge. -ms 6.1 Ordering Data - Procurement documents should specify the title, number and date of this specification. 6.2 Reference Dimensions - A dimension labeled is a non-manda- tory dimension without tolerance, entered on the drawing

29、 for informational purposes only and does not directly govern machining or acceptance inspection. 6.3 Should additional dimensions and tolerances be required, appli- cation therefore shall be made through the Contracting Officer. Where R 4 Provided by IHSNot for ResaleNo reproduction or networking p

30、ermitted without license from IHS-,-,-XII,-3-50378 W) MIL-B-50378 13 I 9970b 032b850 5 W dimensional tolerances are not indicated on the drawings by either a general tolerance note, or by specific tolerance limits, and the contractor had not applied for clarification prior to contract award, tolerances will be determined by the Government based v.pon essential functional and assembly requirements. Custodian: Army-Mu 5 Preparing Activity: Amy-MU Project No. 1305-A617 r : . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-