1、MIL-T-9930(USAF) c 12 February i962 MILITARY SPECZFICATION TEST IT, FOR TORQE CONTROL SYSTEM 1. SCOPE 1.1 Scope. This specification covers one type of testing equipment for testing torque control systems in accordance with MIL-W-9929 (USAF) with a 10-1600 inch-pound (in-lb) range. 2. APPLICABLEWS 2.
2、1 the extent specified herein. in effect on date of invitation for bids shall apply. The following documents form apart of this specification to Unless otherwise indicated; the issue SPECIFICATIONS Military KU-W-99 29 (US) kench-Kit, Torque, Portable, 10-1600 Inch-Pound Range HIL-H-15424 STANDARDS M
3、ilitary Hand Tools, Packaging of MIL-STD- 105 MIL- STD-129 MIL-STD-130 . Sampling Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Identification Marking of U S Military Property 2.2 Other publications. The following documents form a part of this specification to t
4、he extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids shall apply. AMERICAN SOCIETY FOR TESTING WElUALS D999-48T Vibration Test for Shipping Containers (Copies of ASTM D999- 48T may be obtained from the American society for Testing Materials, i96
5、Race St., Philadelphia 3, Pa.) 5. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-31-993O(USAF) NATIONAL BUEAU OF STANDARDS National Bureau of Standards NB!3 Circular 547 (copies of NBS Circular 547 may be obtained from the Superintendent of Docu
6、ments, Government Printing Office, Washington 25, D.C.) 3. REQUIRKHENIIS 3.1 Components. The kit shall consist of the following components; a. Balanced test segment , I b. Certified weights C. Case 3.2 Materials. Materials used in the construction of the com- ponents shall bs new, of uniform quality
7、 and condition and shall be free from seams, cracks, and other defects which may adversely affect the appearance, strength, endurance, or wear resistance of the parts. Materials shall not be hamnered, filed, nor otherwise treated to concea defects the- 3.3 Comercial Parts. Comercial parts having sui
8、table properties may be used where, cm the date of invitation for bids, there are no suitable standard parts. such as screws, bolts, nuts and cotter pins having suitable prop- erties may be used provided: I I / In any case, comrcial utility parts a. They can be replaced by the standard parts (IS or
9、m) without alteration. b, The corresponding standard part numbers are referenced in the parts list and, if practical, on the contractors drawings. 3.3.1 Standard Parts. With theexception specified in 3.3 MS and AN standard parts shall be used where they suit the purpose. They shall be identified on
10、the drawing by their part numbers. 3.4 Test Segment 3.4.1 Test segment components. The test segment shall be con- structed of the following components: 8. Hub b. Counterbalance c. Lever Arm 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-d. Cable a
11、ssembly 3.4.1.1 Hub design. otherwise specified (see 6.2). The hub shall be as shown in figure 1 unless 3.4.1.2 Hub hardness. The hub shall have a minimum hardness of Rockwell C44. 3.4.1.3 Cable assembly. The cable assembly shall consist of a cable, means for attachment of the cable to the lever arm
12、, and a hook or weight platform for holding the certified weights. 3.4.2 when weights are attached to the cable hook or weight platform, the effective lever arm distance between the applied force and the center of the hub attachment shall be a minimum of 10.000 inches. The tolerances on the design l
13、ever arm length shall be 2 0.005 inch. The effective lever arm shall remain the same through an angular travel of 180 with any weight combination from the smallest fur- nished in the kit to the total of all the weights furnished in the kit. The test segment shall be constructed in such a manner that
14、 3.4.3 The test segment shall be capable of carrying the total of all the weights furnished in the kit with a maximum deflection-of 0.005 inch per inch in any part of the segment. 3.44 The lever arm, counterbalance, cable assembly, and hub shall be permanently assembled. telescoping the assembly, pr
15、ovided there is a positive means of locking it in the open position without having to make adjustments. 3.4.5 Balance. line of the lever arm in the horizontal position. Provisions may be made for folding or The test segment shall be balanced with the center- 3.5 Weights. kit which will make the syst
16、em capable of delivering torque valves of 10 in-b, 400 in-lb, 800 in-lb, and 1600 in-lb. Weights shall be certified in accordance with NBS Circular 547, Section 1, Class P; except that sizes may be used which are not specified in Class P. When the weights are not of the sizes specified in Class Pthe
17、 allow- able tolerance value shall be interpolated from a straight line curve between the two adjacent sizes. The weights may haveany shape that does not introduce features that reduce the reliability of the weights, All weights shall be free of ragged or sharp edges or ends. Al1 weights shall be re
18、adily attachable in any combination to the weight platform or hook. A combination of weights shall be furnished with the 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T -99 3 O( US AF) 3.6 Case. The case shall be a suitcase type with provisio
19、ns for securing all parts of the set to prevent movement during shipping and handling. lid, closing latches, suitable protective padding, metal corner supports, and rubber feet. There shall be a suitable seal around the mating surfaces of the lid and the case to prevent dust and foreign materials fr
20、om entering the base whenit is in the closed posit ion. The case shall have a carrying handle, a hinged 3.7 , The kit shall be capable of being handled or moved without movement of parts inside the case or loss of accuracy or damage to either the weights or the test segments. 3.8 Marking. accordance
21、 with MU-STD-130. The kit and each component shall be marked in 4.1 inspection requirements as specified herein. specified, the supplier may utilize his own or any other inspection facilities and services acceptable to the Government. records of the examination and tests shall be kept complete aind
22、available to the Government as specified in the contract or order, The Government reserves the right to perform ay of the inspections set forth in the specifications where such inspections are deemed necessary to assure suppliers and services conform prescribed requirements. . 4.2 Classification of
23、tests The supplier is responsible for the performance of all Except as otherwise Inspection to 4.2.1 Preproduction testa. The production tests shall consist of all the tests specified in section 4. 4.2.2 Acceptance tests. ance tests specified in 4.4. . * Each kit shall be subjected to the accept- 4.
24、3 Preproduction test 4.3.1 Vibration. packaging, or packing, shall be tested in both the transverse, and longitudinal direction in accordance with A.S.T.M. D999-48T, Procedure B, for a period of one hour in each direction. shall then be inspected for loose parts or damage. The first kit of a product
25、ion run, without any The kit 4.4 Acceptance tests Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-99 3O(USAF) 4.4.1 Test segment balance. The complete test segment shall be tested in a suitable fixture. by the hub in anti-friction bearings. arm
26、 shall be in horizontal position 2 10. failure. weight platform to determine the sensitivity of the fixture. 500 milligram load does not unbalance the lever arm, the fixture shall be altered until it has sufficient sensitivity, and the test shall be rerun. The test segment shall be supported The cen
27、terline of the lever Any movement shall constitute A 500 milligram weight will then be attached to the hook or If the 4.4.2 Retest of test segment. Test segments which fail theatest in 4.4.1 may be balanced and retested. 4.4.3 Weight certification. The weights shall be certified and certificates fur
28、nished as specified in NBS Circular 547, Sectioq I, Paragraph 5. 4.4.4 Examination of product. The components shall be examined to determine compliance with the requirements specified herein with respect to materials, workmanship, and marung. Specific attention shall be .given to the length of the l
29、ever arm. 4.5 Inspection of preparation for delivery. The preservation, packaging, packing and marking shall be examined to determine con- formance with the requirements of Section 5 of this specification, and as required by specifications referenced therin. required by referenced specifications, in
30、spection lots and sampling shall be in accordance with Standard MIL-STD-105, with inspection level L-5, and an ML of 4.0 percent defective. Except as 5. PREpARATIOXV FOR DELIVERY 5.1 Preservation and Packaging. Preservation and packaging shall be level A or C as specified (see 6.2). 5.1.1 Level A. a
31、nce with the requirements of Specification MI and the fact that the Govern- ment may have formulated, furnished, or in any way supplied the said drawings, specifications, or other data is not to be regarded by implication or otherwise as in .any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that mag in any way be relateci thereto. Level 6f packing required (see 5.2) JPClebb Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
