ARMY MIL-DTL-44475 A-1996 RELEASE PARACHUTIST'S INDIVIDUAL EQUIPMENT《降伞的工业设备的释放》.pdf

1、NIL-DTL-44475A 999990b 202b305 09 9 MIL-DTL-44475A (GL) 9 September 1996 SUPERSEDING 8 November 1993 MIL-R-44475 (GL) DETAIL SPECIFICATION RELEASE, PARACHUTISTS INDIVIDUAL EQUIPMENT This specification is approved for use by the Natick Research, Development, and Engineering Center, Department of the

2、Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one type of a fabric release assembly. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specif

3、ication. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requiremen

4、ts documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Drawing. The following Government drawing forms a part of this document to the extent specified herein. Unless otherwise specified, the issue is that cited in the solicitatio

5、n. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, U.S. Army Natick Research, Development, and Engineering Center, Attn: SSCNC-UTE Natick, MA O1 760-501 7 by using the self-addressed

6、Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 1670 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DRAWING U.S. ARMY NATICK RESEARCH, DEVELOPMENT AND ENGINEERING CENTER 1

7、 1 - 1-6860 - Release, Parachutists Individual Equipment (Copies of drawings are available from the U.S. Army Natick Research, Development and Engineering Center, ATTN: AMSSC-S-IMI, Natick, MA 01760-501 7). 2.3 Order of precedence. In the event of a conflict between the text of this document and the

8、 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. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article

9、 inspection in accordance with 4.2. 3.2 Materials and components. Materials and components shall conform to the requirements on the applicable drawings, to subsidiary specifications and standards applicable thereto, and as specified herein. 3.2.1 Recycled. recovered. or environmentally preferable ma

10、terials. Recycled, recovered, or environmentally preferable materiais should be used to the maximum extent possible provided the material meets or exceeds the operational requirements, and promotes economically advantageous life cycle costs. 3.3 Construction. The construction shall conform in all re

11、spects to the drawing listed in Section 2 and all subsidiary drawings pertaining thereto, and as specified herein. 3.3.1 Stitching. machine. All machine stitching shall be as specified on the applicable drawings and as specified herein. 3.3.1.1 Tvpes 301 and 308 stitching. Ends of all type 301 stitc

12、hing shall be backstitched or overstitched not less than 1/2 inch in accordance with the required stitch pattern. Ends oftype 308 stitching shall be secured by crowding a minimum of three stitches (accomplished by not allowing the materials to move) at the beginning and end of the stitching. Thread

13、tension shall be maintained so that there will be no loose stitching resulting in the puckering of the material sewn. The lock shall be embedded in the materials sewn. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I IlIL-DTL-44475A 999990b 202b30

14、7 b8L MIL-DTL-44475A (GL) 3.3.1.1.1 Repairs of type 301 stitching. Repairs of type 301 stitching shall be as follows: a. When thread breaks or bobbin run-outs occur during the stitching, the stitching shall be repaired by restarting the stitching a minimum of 1 inch (1/2 inch for box-x and W-W stitc

15、hing) fiom the end of the stitching. L/ b. Thread breaks or two or more consecutive skipped or run-off stitches noted during inspection of the item (in-process or end item) shall be repaired by overstitching. The stitching shall start a minimum of 1 inch from the defective area, (U2 inch for box-x a

16、nd W-W stitching), continue over the defective area, and continue a minimum of 1 inch (1/2 inch for box-x and W-W stitching) beyond the defective area onto the existing stitching. Loose or excessively tight stitching shall be repaired by removing the defective stitching, without damaging the materia

17、ls, and restitching in the required manner. L/ - 1 / When making the above repairs, the ends of the stitching are not required to be backstitched. 3.3.1.1.2 Repairs of type 308 stitching. Repairs of type 308 stitching shall be in accordance with 3.3.1.1.1 a and 3.3.1.1.1 b, except that the stitching

18、 shall overstitch the defective area a minimum of three stitches onto the existing stitches. 3.3.1.2 Automatic stitching. Automatic stitching machines may be used to perform any of the required stitch patterns provided the requirements for the stitch pattern, stitches per inch, and size and type of

19、thread are met, and at least three or more tying, overlapping, or back stitches are used to secure the ends of stitching. 3.3.2 Thread ends. All thread ends shall be trimmed to a maximum length of 1/4 inch. 3.3.3 Setting of grommets. Holes shall be prepunched to receive the grommets. Holes prepunche

20、d to receive the grommets shall be smaller than the outside diameter of the grommet barrel so that the barrel must be forced through the hole. The grommet shall be securely clinched without cutting the adjacent material. 3.3.4 Finishing of the iacketed wire rope ends. All *re rope ends shall be fini

21、shed by either the melt method specified in 3.3.4.1 or by the dip method specified in 3.3.4.2 such that the ends are completely enclosed with the melted coating flush with the unmelted nylon jacket. 3.3.4.1 Melt method. Heat the wire rope end nylon jacket with a suitable electrical heating element s

22、o as to melt the nylon over the end to form a smooth round surface. Remove any melted residue on the jacket surface with a fine abrasive material such that the surface is not damaged and is finished smooth. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I

23、HS-,-,-MIL-DTL-44475A m qmwob 2026308 518 m I 1 MIL-DTL-44475A (GL) 3.3.4.2 Dip method. Coat the wire rope end with a nylon II or nylon 6/6 powder. Heat the coated end for 10 seconds at 405 & 15F using either an induction coil (2 to 4-inch) with an automatic timer control or an electric melting pot

24、with an automatic temperature control (see 6.3). 3.4 Replacement of defective components. During the spreading, cutting and manufacturing process, components having material defects or damages that are classified as defects in table I shall be removed from production and replaced with nondefective a

25、nd properly matched components. 3.5 Repairs. Repairs such as mends, darns, patches, or splices are not permitted on the release. 3.6 Workmanship. The finished and assembled release shall conform to the quality of product established by this specification. 4. VERIFICATION 4.1 Classification of inmect

26、ions. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2) b. Conformance inspection (see 4.3) 4.2 First article inspection. When a first article inspection is required (see 3.1 and 6.2) it shall be examined in accordance with 4.3. Sampling fo

27、r first article inspection shall be as specified in the contract or purchase order (see 6.2). 4.3 Conformance inspection. Conformance inspection shall include the examination of 4.3.1,4.3.2,4.3.3 and 4.3.4. Sampling for the inspections in 4.3.3 and 4.3.4 shall be as specified in the contract or purc

28、hase order (see 6.2). 4.3.1 Component and material inspection. Components and materials shall be inspected in accordance with all the requirements of referenced documents unless otherwise excluded, amended, modified, or qualified in this specification or applicable purchase document. 4.3.2 In-proces

29、s inspection. Inspection of subassemblies shall be made to ascertain that construction details and dimensional requirements which cannot be examined in the finished product are in accordance with specified requirements. The Govement reserves the right to exclude from consideration for acceptance, an

30、y material or service for which in-process inspection has indicated nonconformance. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-44475A 9999906 2026309 454 D MIL-DTL-44475A (GL) 4.3.3 End item visual examination. The end items shall be e

31、xamined for visual defects. Each noncompliance shall be scored as a defect in accordance with table I. TABLE I. End item visual defects Classification Examine Defect Major Minor Webbing or tape Not specified type or class 101 Color not as specified 201 Any hole, cut, or tear Edge frayed, beaded, cor

32、ded, or torn 102 103 202 Ends not seared as specified Fastener tape Cut or tear Hooks crushed affecting closure Any fastener tape reversed, Le., pile tape attached where hook tape is required or vice versa Not specified type and color Cord Hardware 104 105 106 203 Not specified type and color 204 Fr

33、actured, malformed, or bent Burrs or sharp edges Protective finish omitted or not as specified, any corroded area Not specified type, size or style Adapter attached with friction grip facing wrong direction Jacketed wire rope Not specified type or size Ends not nylon coated or wire material not comp

34、letely enclosed Surface of nylon coated end not smooth or flush with melted jacketed surface 107 108 1 o9 110 111 112 113 114 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-44475A m 9999906 202b310 17b m MIL-DTL-44475A (GL) TABLE I. End it

35、em visual defects (contd.) Examine Defect Classification Major Minor Swaged wire rope Missing sleeve Not specified type or size Not swaged as specified One sleeve swage omitted Two sleeve swages omitted Swaged excessively tight, cutting wire rope material Swaged loosely, permitting sleeve to rotate

36、freely Brass grommets Clinched excessively tight, cutting adjacent material that grommet may be detached from material side of material Insecurely clinched to a degree Washer installed on incorrect Barrel split Loosely clinched, permitting grommet Was her omitted to rotate freely within the hole Thr

37、ead Not specified type, class, or size Not specified color Open seams 1/2 inch or less More than 1/2 inch NOTE: A seam shall be classified as open when one or more stitches joining a seam are broken or when two or more consecutive skipped or run-off stitches occur. Seam and Wrong seam or stitch type

38、 stitch type Stitches and stitching Stitching pattern not as specified Any row of stitching missing One stitch per inch under or over minimum and maximum specified 115 116 205 206 117 118 119 120 121 207 208 209 122 123 210 21 1 124 125 126 127 212 6 Provided by IHSNot for ResaleNo reproduction or n

39、etworking permitted without license from IHS-,-,-MIL-DTL-44475A 9999906 20263LL 002 MIL-DTL-44475A (GL) TABLE I. End item visual defects (contd.) Classification Examine Defect Major Minor Stitches and stitching (contd) Components and assembly Identification marking Cleanness Construction and assembl

40、y Two or more stitches per inch under Thread breaks, bobbin run outs, or two or or over minimum and maximum specified more consecutive skipped or run-off stitches not overstitched or restitched as specified Ends of stitching not backstitched or secured as specified Tension loose resulting in loose t

41、op or bottom thread, or tight tension causing puckering of material at stitch line Needle chews or bunched stitching 128 129 213 130 131 Any component part omitted or not as specified or required operation omitted (unless otherwise classified herein) 132 specified 133 Any component misplaced or not

42、assembled as Omitted, illegible, incorrect, misplaced, or size Color not as specified of characters not as specified Dirt, grease or oil or foreign matter clearly Thread ends not trimmed to 114 inch or less noticeable 134 214 Any component missing, or not assembled or joined as specified 135 215 216

43、 4.3.4 End item dimensional examination. The end items shall be examined for conformance to the dimensions specified on the drawings. Only those dimensions that can be evaluated without damaging or disassembling the end items shall be examined. Any dimension not within the specified tolerance shall

44、be classified as a defect. 5. PACKAGING 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-44475A 9999906 202b312 T49 MIL-DTL-44475A (GL) 5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract

45、 or order (see 6.2). When actual packaging of materiel is to be performed by DoD personnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activity withi

46、n the Military Department or Defense Agency, or within the Military Departments System Command. Packaging data retrieval is available fiom the managing Military Departments or Defense Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity. 6. NOTES (T

47、his section contains information of a general or explanatory nature which may be helpful, but is not mandatory). 6.1 Intended use. The fabric release assembly is used by airborne personnel to release a container assembly during a parachute descent. 6.2 Acquisition requirements. Acquisition documents

48、 must specie the following: a. Title, number and date of this specification b. When first article is required (see 3.1) c. Sampling plan, lot size, sample size (see 4.3) d. Packaging requirements (see 5.1) 6.3 Source for heat sealinp equipment. A source for the heat sealing equipment for forming the

49、 ends of the nylon jacketed wire rope (see 3.3.4.2 - induction coil dip method) is Boyd Coatings Research Co., Inc., 51 Parmenter Road, Hudson, MA 01749. 6.4 Subiect term (kev word! listing. Airborne jump operations 6.5 Changes fiom previous issue. Marginal notations are not used in this revision to identi changes with respect to the previous issue due to the extent of the changes. Custodian: Army - GL Preparing activity: Army -