1、MIL-B-50772 (1) 12 M 7777706 0330807 2 I - . - MILITARY SPECIFICATION BONDING OF PRECISION MIRRORS (GIass-to-Metal) MIL-B-50772 (MU) AMENDMENT 1 17 March 1975 This amendment forms a part of Military Specification MIL-B-50772(M), dated 24 March 1972 and is approved for use by all Departments and Agen
2、cies of the Department of Defense. . Paragraph 3.1.4: Delete and substitute the following: “3.1.4 Spacers.- Unless otherwise specified on the drawing or other documents (see 6.2), spacers used to control bonding thickness shall be 1/4“ f 1/64! diameter by 0.025“ & 0.002“ thick cellulose acetate in a
3、ccordance with L-P-504.“ Paragraph 3.2.2: “3.2.2 Bond configuration.- The bond area shall be located as shown on the applicable assembly drawing. Paragraph 3.2.4.2: substitute the following: Delete and substitute the following: Delete entire paragraph and the caution note and “3.2.4.2 Adhesive appli
4、cation.- Place the mirror in the fixture with the surface to be bonded facing up. location(s) specified on the assembly drawing. excessive, quantity of adhesive should be deposited such .that when the metal mounting bracket is placed in position, a bond of the required area and thickness will be for
5、med.“ “Puddle“ the adhesive at the A sufficient, but not Paragraph 3.2.4.3: Delete entirely. Paragraph 3.2.4.4: “3.2.4.4 Metal component positioning and application of pressure.- Carefully locate the metal component on the adhesive puddles in the proper position as shown on the applicable drawing. S
6、lowly and evenly apply pressure to the back of the metal component so that the adhesive flows out to form the specified bond area and the metal component bottoms on the spacers to yield the specified bond thickness. pressure not greater than 5PSI on the assembly during the oven eure.“ Delete and sub
7、stitute the following: Maintain a moderate FSC 12GP THIS DOCUMENT CONTAINS. . PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-B-50772 (1) 12 7777706 0330808 4 W e. . .I MIL-B-50772 (MU) . AMENDMENT 1 Paragraph 6.1 the following: Intended u
8、se: Belete the third sentence and substitute “This bonding method is also generally applicable to a19 bonded mirror assemblies .“ Paragraph 6.2: “6.2 Ordering data.- Purchasers should exercise any desired options . offered herein and procurement documents should specify the followingr Delete and substitute the bllowing: a. Title, number and date of this specification. b, Spacer size (see 3.1.4). Gus todian: Frepa r i ng ac t 3v i t y : Army - Mu Army - Mu , Project No. 12GP-AO39Y Page 2 of 2 I . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
