1、B. 3 MIL-C-45504E 10 M 9999906 0533757 7 I INCH-POUND I MIL-C-45504E (AR) 8 June 1992 - SUPERSEDING MIL-C-45504D (AR) 13 JANUARY 1987 MILITARY SPECIFICATION CANNON, 105MM GUN: M68 CANNON, 105MM GUN: M68A1 This specification is approved for use by the Department of the Army and is available for use b
2、y all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification supports the acquisition of two models of cannon. This specification includes the minimum essential Engineering and Packaging Requirements and the necessary Qualty Assurance Provisions to determine th
3、at these requirements have been met. 1.2 Classification. The two models are: Type I. Cannon 105MM Gun: M68 Type II. Cannon 105MM Gun: M68A1 a 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form
4、a part of this document to the extent specified herein. Unless otherwise Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Armament Research, Development and Engineering Center, US Army
5、 Armament, Munitions and Chemical Command, ATTN: SMCAR-CCB-SC, Watervliet, NY 1218.9-4050 by using the self-addressed Standardization Document Improvement Proposal (DDForm 1426) appearing at the end of this document or by letter. AMSC N/A FSC 1015 DISTRIBUTION STATEMENT A. Approved for public releas
6、e; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-45504E 10 M 9999906 05337.58 O = o MIL-C-45504E(AR) specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Speci
7、fications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS, MILITARY MIL-C-13931 - Cannon, General Specification for MIL-P-14232 - Parts, Equipment and Tools for Army Materiel, Packaging of MIL-1-45607 - Inspection Equipment, Acquisition, Maintenance
8、, and Disposition of STANDARDS MILITARY MIL-STD-129 - Marking for Shipment and Storage MIL-STB-1190 - Minimum Guidelines for Level C Preservation, Packing and Marking MIL-STD-2073-1 - DOD Materiel Procedures for Development h Application of Packaging Requirements (Unless otherwise indicated, copies
9、of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.1.2 Other Government documents, drawinss, and publications. The following other Government documents, drawings, a
10、nd publications form a part of this specification to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. DRAWINGS (see 6.8) US Army Armament Research, Development and Enqineerinq Center B7309991 A73 O9 9 9 2 D8773565 B8775092 A877509 6 F8777451 A8
11、779 07 1 B8769067 - Magnetic Particle Inspection of Breech Rings - Magnetic Particle Inspection Criteria for - Gage, Tester, Insulation - Gage, Plug, Double End - Gage, Template - Gage, Continuity Tester Special - Instructions - Magnetic Particle Inspection of Cannon and (Wedge Type) Breech ,blocks
12、(Wedge Type) Mount Components 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-f MIL-C-45504E LO 9999906 0533757 2 W - $8765947 - Cannon, 105MM: M68 P8765947 - Special Packaging Instruction, Cannon, C11578832 - Inspection Procedures and Criteria, Gu
13、n Tube D11579700 - Cannon, 105MM: M68A1 P11579700 - Special Packaging Instruction, Cannon, 105MM: M68 Surface Indications 105MM: M68A1 PUBLICATIONS Master LQAP 8765947 - List of Quality Assurance Master LQAP 11579700 - List of Quality Assurance QAP-APPENDIX-WVA - General Quality Assurance Provisions
14、 for Cannon, 105MM: M68 Provisions for Cannon, 105MM: M68A1 Provisions (Copies of drawings, and other Government documents required by contractors in connection with- specific acquisition functions should be obtained from the contracting activity or as directed by the Procuring Contracting Officer.)
15、 2.2 Non-Government publications. The following document(s) form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, th
16、e issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). American Society for Testing and Materials (ASTM) ASTM D 3951 - Commercial Packaging, Practice for (Application for copies should be addressed to the American Society for Testing and M
17、aterials, 1916 Race Street, Philadelphia, . Pennsylvania 19103-1137.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services
18、.) 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. - 3 Provi
19、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-45504E LO 9999906 0533760 9 = MIL-C-45504E (AR) 3. REQUIREMENTS 3.1 General requirements. Cannon and component parts shall be in accordance with the applicable general drawing (D8765947 for M68 or D115
20、79700 for M68A1), this specification, MIL-C-13931, and all referenced documents. Any conflicts are to be resolved by means of the order of precedence (see 2.3). 3.2 First article. The contractor shall submit a irst article unless it is specifically waived in the contract (see 4.3 and 6 2) . No first
21、 article requirements shall be waived without review and approval by the Procuring Contracting Officer 3.3 Functional characteristics. Each cannon assembly shall perform the firing, pressure sustaining, and projectile launching function of its type gun, 105MM: M68 or M68A1. The breech mechanism, fir
22、ing mechanism, and other moving parts shall function smoothly without interference, erratic movement or malfunction. 3.3.1 Breech mechanism. Camming of the operating crank during counter-recoil or rearward rotation of the operating lever rotates the breechblock crank rearward to lower the breechbloc
23、k. When the breechblock nears the opened position, the lips of the extractors rotate sharply rearward to extract the cartridge case. The extractors then lock the breechblock in the opened position until tripped by the insertion of a cartridge. The breech mechanism with the closing spring adjustor se
24、t for minimum preload, shall then raise the breechblock to the closed (firing) position. Clockwise rotation of the adjustor shall increase the preload of the closing spring. (see 6.3). 3.3.2 Firinq pin retraction. With the initial opening movement of the breechblock, the firing pin retracts and rema
25、ins behind the front face until the breechblock is returned to the closed posit ion. 3.3.3 Firins pin protrusion. When the breech is closed, the protrusion of the firing pin shall be not less than 0.075 inch nor more than 0.115 inch. 3.3.4 Headspace. Headspace, the distance from the front face of th
26、e closed and locked breechblock to the breech face of the tube, shall be not less than 0.262 inch nor more than 0.282 3.3.5 Firins mechanism. The firing mechanism, consisting of the firing plunger, the firing contact, and the firing pin, shall meet the following requirements: inch. 3.3.5.1 Continuit
27、y. The firing mechanism shall be capable of passing a current of at least 8 amps, and shall have a resistance 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-45504E 10 9999906 0533761 O m of 1 ohm or less when using an applied test voltage of
28、 not more than 24 volts, 3.3.5.2 Dielectric strensth leakase) . The dielectric strength (leakage) shall be such that no current in excess of 0.5 milliampere shall flow when the firing mechanism is subjected to an electrical potential of not less than 1000 volts, RMS, AC, 50/60 Hz for 30 seconds. 3.3
29、.5.3 Insulation resistance. The firing mechanism shall have a minimum insulation resistance of 1 megohm when a potential of 500 volts DC is applied for 1 minute. 3.4 Performance. 3.4.1 Hish pressure resistance. The cannon shall be capable of withstanding a chamber pressure of 80,000 + 6000 pounds pe
30、r square inch when tested as specified in 4.5.6. 3.4.2 Functioninq. There shall be no impairment in the functioning of the components during and after the testing specified in 4.5.6. 3.4.3 Bore enlarsement. The bore diameters , measured across the rifled lands after firing no more than six rounds, s
31、hall not exceed the before firing diameters by more than the amounts in TABLE I. TABLE I. Allowable bore enlarsement. Distance forward of 2 cals. commencement of riflins 0.10 in. 1 in. 1 cal. to muzzle Amount (in inches) 0.008 0.008 0.006 0.003 NOTE: Interpolate to determine the allowable enlargemen
32、t between the distances listed. There shall be no indication of abnormal wear, damage or deformation of the bore surface. 3.4.4 Material soundness. The cannon shall meet the requirements specified herein without evidence of cracks or fractures and shall comply with soundness requirements specified o
33、n the applicable drawings. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and 5 Provided by IHSNot for ResaleNo reproductio
34、n or networking permitted without license from IHS-,-,- MIL-C-45504E 10 I 9999906 0533762 2 W MIL-C-45504E (AR) t tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the in
35、spection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Resp
36、onsibilitv for compliance. All items shall meet all requirements of sections 3 and 5. specification shall become a part of the contractors overall inspection system or quality program. inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring tha
37、t all products or supplies submittedto the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defect
38、ive material, either indicated or actual, nor does it commit the Government to accept defective material. The inspection set forth in this The absence of any 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.
39、3). b. Production Qualification Test (PQT) (see 4.4). c. Quality conformance inspection (see 4.5). 4.3 First article inspection. Unless otherwise specified in the contract, (see 6.2.1), first article cannon and specified parts thereof shall be inspected by the contractor and submitted to the Governm
40、ent for approval. Inspection shall be in accordance with applicable Quality Assurance Provisions (QAPS and QAP-APPENDIX-WVA. QAPs are listed in Master LQAP 8765947 or in Master LQAP 11579700, as applicable. First article sample sizes shall be as specified in applicable item QAPs, or the contract, as
41、 applicable. First article cannon and parts thereof shall be representative of the production processes to be used during quantity production. 4.4 Production Qualification Test (POT). When specified in the contract, (see 6.2.1), cannon shall be subjected to Production Qualification Testing by the Go
42、vernment to assure compliance with the requirements of this specification and any additional requirements listed in the contract. Production Qualification Testing procedures and sample size shall be as specified in the contract. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted
43、without license from IHS-,-,-J- Y 7 MIL-C-45504E LO 9999906 0533763 4 i MIL-C-4 55043 (AR) 4.5 ualitv conformance inspection. Quality conformance . inspectfon is listed in Table II. 0 TABLE II. Quality conformance inspection. Cateqory/Characteristic Requirement Faraqraph Inspection Parasraph Examina
44、tions Firing pin retraction Firing pin protrusion Headspace Firing mechanism Continuity Dielectric strength (leakage) insulation resistance Material soundness Packaging 3.3,2 3.3.3 3.3.4 3.3.5 3.3.5.1 3.3.5.2 3.3.5.3 3.4.4 5. 4.5.4.1 4.5.4.1 4.5.4.2 4.5.4.3 4.5.4.3.1 4.5.4.3.2 4.5.4.3.3 4.5.4.4 4.5.
45、4.5 Functional inspection 3.3 4.5.5 Breech mechanism 3.3.1 4.5.5.1 Extractors 3.3.1 4.5.5.2 Tests Proof acceptance (cannon) 3.4.1 to 3.4.4 4.5.6.1 Proof firing procedures 3.4.1 to 3.4.4 4.5.6.1.1 (without sampling) 4.5.6.1.2 (with sampling) Proof acceptance (breech 3.4.1, 3.4.2, 3.4.4 4.5.6.2 mechan
46、ism) General proof firing procedures 3.4.1 to 3.4.4 4.5.6.3 4.5.1 Inspection provisions. Cannon and parts thereof shall be inspected for conformance to requirements of this specification, MIL-C-13931, QAPs listed in Master LQAP 8765947, Master LQAP 11579700, as applicable, and QAP-APPENDIX-WVA. 4.5.
47、2 inspection approval stamp. The application of the inspection approval stamp shall be as specified in MIL-C-13931. 0 Proof firing procedures 3.4.1 to 3.4.4 4.5.3 inspection equiDment. 4.5.3.1Acquisition, maintenance and disposition. Unless otherwise specified (see 6.2.1), responsibility for acquisi
48、tion, maintenance, and disposition of inspection equipment prescribed in applicable item QAPs, and for all other inspection equipment required to perform inspections prescribed by applicable specifications, shall be in accordance with MIL-1-45607. 7 Provided by IHSNot for ResaleNo reproduction or ne
49、tworking permitted without license from IHS-,-,-MIL-C-45504E 10 9999906 0533764 b 4.5.3.2 Accuracy of standard measurinq equipment. When commercial and modified commercial inspection and test equipment is used, it shall be capable of repetitive measurements to an accuracy of 10 percent of the total tolerance of the characteristic being inspected. 4.5.4 Examinations. 4.5.4.1 Firins pin protrusion/retraction. Firing pin protrusion shall
