安装保护扣眼（锁环）INSTALLATION OF PROTECTIVE GROMMETS
1. INTRODUCTION 介绍
A. The data in this subject comes from the Boeing part standard documents for the specified grommet.
本主题中的数据来自波音指定扣眼的零件标准文件。
B. The data is general. It is not about all situations or specific installations. Use this data as a guide to help you write minimum requirements.
数据为通用数据。它不适用于所有情况或特定安装。请使用这些数据作为帮助您编写最低要求的指南。
2. MATERIALS AND EQUIPMENT 材料和设备
NOTE: Equivalent substitutes can be used.
注:可以使用等效替代品。
A. Solvents (SOPM 20-60-01)
溶剂(SOPM 20-60-01)
(1) Methyl ethyl ketone — TT-M-261
甲基乙基酮——TT-M-261
(2) Toluene — TT-T-558
甲苯——TT-T-558
(3) Aliphatic Naphtha — TT-T-95 (replaces BMS 3-2 solvent)
脂肪族石脑油——TT-T-95(取代BMS 3-2溶剂)
(4) Series 98-1 (SOPM 20-30-98)
98-1系列(SOPM 20-30-98)
B. Adhesives (SOPM 20-50-12)
粘合剂(SOPM 20-50-12)
(1) Type 12
12型
(2) Type 70
70型
(3) Type 82
82型
C. Primer, zinc chromate — TT-P-1757 (SOPM 20-60-02)
底漆,铬酸锌——TT-P-1757(SOPM 20-60-02)
D. NAS1368 grommet installation tool — ST1065C or ST1065D or A20006-1 or A20006-32
NAS1368 扣眼安装工具——ST1065C 或 ST1065D 或 A20006-1 或 A20006-32
E. BACG20L grommet installation tool — ST1069D
BACG20L 扣眼安装工具——ST1069D
3. SURFACE PREPARATION 表面处理
A. All of the grommets can be installed on bare metal or all organic or inorganic coatings. Refer to the applicable overhaul instructions for the specified surface preparation and finish.
所有扣眼均可安装在裸露的金属表面或所有有机或无机涂层上。有关指定的表面处理和光洁,请参阅适用的检修说明。
B. If the instructions bond the grommet with adhesive, clean the surface with a clean cloth wet with aliphatic naphtha, unless the finish is BMS 10-11 primer or enamel. Use toluene on BMS 10-11 epoxy coatings.
如果说明中要求用粘合剂粘结扣眼,则用蘸有脂肪族石脑油的干净布清洁表面,除非表面是BMS 10-11底漆或瓷漆。在BMS 10-11环氧涂层上使用甲苯。
C. Clean the nylon grommet areas to be bonded with a Series 98-1 solvent (SOPM 20-30-98). Dry with a clean, dry cloth.
用98-1系列溶剂(SOPM 20-30-98)清洁尼龙扣眼粘合区域。用干净的干布擦干。
4. NAS1368 FLIP TYPE GROMMETS NAS1368 翻盖式扣眼
A. Regular Installation
常规安装
(1) Put the grommet into the hole in the structure. The preformed head can go in one direction or the other, as necessary for easy installation.
将扣眼放入结构孔中。根据需要,预成型头可以朝一个方向或另一个方向,以便于安装。
(2) Get the installation tool for the grommet to be installed.
准备安装工具,用于安装扣眼。
NOTE: The dash numbers of ST1065C and D installation tools are the same as the dash numbers of the NAS1368 grommets. For example, tool ST1065C-16 or ST1065D-16 will fit the NAS1368-16 grommet. (The dash number is the nominal inside diameter of grommet in sixteenths of an inch. For example, the NAS1368-16 grommet has a nominal inside diameter of 1.00 inch.)
注意:ST1065C和D安装工具的标号与NAS1368扣眼的标号相同。例如,工具ST1065C-16或ST1065D-16适用于NAS1368-16扣眼。(破折号编号是扣眼的公称内径,以十六分之一英寸为单位。例如,NAS1368-16扣眼的名义内径为1.00英寸。)
NOTE: The A20006 tool set comes with a placard on the storage box that tells what tool components to use for each NAS1368 grommet.
注意:A20006工具组在储物箱上贴有标签,标明每个NAS1368扣眼应使用的工具组件。
(3) Flip the grommet as shown in Figure 1. The installed grommet can be loose in the hole if the flipped leg is sufficiently bent to keep the grommet installed during service. The angle and the height of the flipped leg must be constant around all of the grommet circumference.
如图1所示翻转扣眼。如果翻转的支脚足够弯曲,则安装的扣眼在孔中可能会松动,以便在勤务期间保持扣眼的安装。翻转支脚的角度和高度必须在扣眼周长的所有位置保持不变。
B. If the clearance with the adjacent structure is too tight to let you use the installation tool, or to replace a grommet without removal of the wire bundle or cable:
如果与相邻结构的间隙过小,无法使用安装工具,或者在不拆除线束或电缆的情况下更换扣眼:
(1) Put the grommet in the installation tool and flip it as shown in Figure 1.
将扣眼放入安装工具中,如图1所示翻转扣眼。
CAUTION ：DO NOT GIVE THE FLIPPED LEG OF THE GROMMET MORE THAN A 40 DEGREE FLIP ANGLE.
注意:扣眼的翻转角度不要超过40度。
(2) Cut the grommet with a sharp knife or a razor blade to make an angle cut as shown in Figure 2.
用锋利的刀或刀片切割扣眼,如图2所示的角度切割。
(3) Wipe the two cut edges of the grommet with a clean cloth wet with a Series 98-1 solvent (SOPM 20-30-98). Do not touch the cleaned cut edges with your fingers.
用蘸有98-1系列溶剂(SOPM 20-30-98)的干净布擦拭扣眼的两个切割边缘。不要用手指触摸清洁过的切割边缘。
(4) Use the Type 82 adhesive as specified in SOPM 20-50-12 unless the part will be open to fuel or phosphate ester fluids. Use Type 70 adhesive as specified in SOPM 20-50-12 if the part will be open to fuel or phosphate ester fluids.
按照SOPM 20-50-12的规定使用82型粘合剂,除非零件会接触到燃油或磷酸酯液体。如果零件会接触到燃油或磷酸酯液体,则按照SOPM 20-50-12的规定使用70型粘合剂。
(5) Apply a thin layer of the adhesive to the cut edges of the grommet.
在扣眼的切边涂上一层薄薄的粘合剂。
(6) Install the grommet in the hole with the bonded seam at the top.
将扣眼安装在孔中,粘合缝朝上。
NOTE: If the cut faces of the grommet will not touch each other with sufficient pressure for a good bond (approximately 10 psi), wrap a length of string or wire-bundle tie cord around the grommet and pull it tight. Tie this string with a basic slip knot and keep the ends long for easy removal when the adhesive is cured.
注意:如果扣眼的切割面无法在足够压力下接触以实现良好粘合(约10 psi),则可在扣眼上缠绕一段绳子或金属丝束扎带并拉紧。用基本活结将绳子系紧,并留出长末端,以便在粘合剂固化后轻松拆除。
(7) Wipe off unwanted adhesive with a clean cloth wet with a Series 98-1 solvent (SOPM 20-30-98).
用蘸有98-1系列溶剂(SOPM 20-30-98)的干净布擦去多余的粘合剂。
(8) Let the adhesive cure as specified in SOPM 20-50-12 before you use the part.
在使用零件前,按照SOPM 20-50-12的规定让粘合剂固化。
5. BACG20Z CATERPILLAR GROMMETS 履带扣眼BACG20Z
A. These caterpillar grommets are supplied as strips and must be cut to the specified length at installation. For larger holes, two or more pieces can be used, but each must be bonded in position. When used in slots or holes with flat or almost flat surfaces, the grommet is bonded to the flat surface to keep the shape in the hole and prevent loose pieces.
这些履带扣眼以条状提供,安装时必须剪切成指定长度。对于较大的孔,可以使用两块或更多块,但每块都必须粘接到位。当用于表面平坦或几乎平坦的槽或孔时,履带扣眼应粘接在平坦的表面上,以保持其在孔中的形状并防止松散。
B. For one-piece grommets installed in small round holes, an adhesive bond is not necessary. Install with the parting edges at the 12 o’clock position.
对于安装在圆形小孔中的一体式扣眼,无需粘合剂。将分模边缘安装在12点钟位置。
C. For installations in large holes, where two pieces of the grommet are necessary, or if the hole shape can cause a loose area, as in slots:
对于安装在需要使用两块扣眼的大孔中,或者孔的形状可能会导致松动区域,例如在狭槽中:
(1) Clean the area around the hole as specified in Paragraph 3.B.
按照第3.B段的规定清洁孔周围的区域。
(2) Prepare some Type 82 adhesive (SOPM 20-50-12), unless the part will be open to fuel or phosphate ester fluids. Use Type 70 adhesive (SOPM 20-50-12) if the part will be open to fuel or phosphate ester fluids.
准备一些82型粘合剂(SOPM 20-50-12),除非零件会接触到燃油或磷酸酯液体。如果零件会接触到燃油或磷酸酯液体,则使用70型粘合剂(SOPM 20-50-12)。
(3) Clean the grommet with a clean cloth wet with a Series 98-1 solvent (SOPM 20-30-98).
用蘸有98-1系列溶剂(SOPM 20-30-98)的干净布清洁扣眼。
(4) Apply a thin layer of the prepared adhesive to the grommet and the mating surface.
在扣眼和接合面上涂上一层薄薄的准备好的粘合剂。
(5) Install the grommet with the joints in the top half of the hole. Clean off unwanted adhesive with a clean cloth and a Series 98-1 solvent (SOPM 20-30-98).
将带接头的扣眼一起安装在孔的上半部分。用干净的布和98-1系列溶剂(SOPM 20-30-98)清除多余的粘合剂。
(6) Make sure that the grommet has a good bond with the mating surfaces. Let the adhesive cure as specified in SOPM 20-50-12.
确保扣眼与配合表面牢固粘合。按照SOPM 20-50-12的规定让粘合剂固化。
D. For installation of the caterpillar grommet material on sharp linear edges of structure under wires or cables:
在电线或电缆下方结构尖锐的线性边缘安装履带扣眼材料:
(1) Clean the linear edge as specified in Paragraph 3.B.
按照第 3.B 款的规定清洁线性边缘。
(2) Prepare Type 82 adhesive or Type 70 adhesive as specified in Paragraph 5.C.(2).
按照第5.C.(2)段的规定,准备82型粘合剂或70型粘合剂。
(3) Clean the grommet with a clean cloth wet with a Series 98-1 solvent (SOPM 20-30-98).
用蘸有98-1系列溶剂(SOPM 20-30-98)的干净布清洁扣眼。
(4) Apply a thin layer of the prepared adhesive to the grommet and the mating surface.
在扣眼和配合面上涂上一层薄薄的准备好的粘合剂。
(5) Install the grommet material as a strip along the linear edge of the structure. Clean off unwanted adhesive with a clean cloth and a Series 98-1 solvent (SOPM 20-30-98).
将扣眼材料沿结构的线性边缘安装成条状。用干净的布和98-1系列溶剂(SOPM 20-30-98)清除多余的粘合剂。
(6) Make sure that the grommet material has a good bond with the mating surface. Let the adhesive cure as specified in SOPM 20-50-12.
确保扣眼材料与配合表面具有良好的粘合力。按照SOPM 20-50-12的规定让粘合剂固化。
6. BACG20AD CATERPILLAR GROMMETS 履带扣眼BACG20AD
A. These caterpillar grommets are supplied as strips and must be cut to the specified length at installation. They must be used only in flanged holes and must be bonded to the substrate.
这些履带扣眼以条状供应,安装时必须剪切成指定长度。它们只能用于法兰孔,且必须与基材粘合。
B. Cut the grommet ends square. Cut off the necessary length for the hole.
将扣眼两端剪成直角。剪下与孔径匹配的长度。
C. Cut the flanged hole as specified in Paragraph 3.B.
按第3.B段所述方法切割法兰孔。
D. Prepare some Type 82 adhesive (SOPM 20-50-12), unless the part will be open to fuel or phosphate ester fluids. Use Type 70 adhesive (SOPM 20-50-12) if the part will be open to fuel or phosphate ester fluids.
准备一些82型粘合剂(SOPM 20-50-12),除非零件会接触到燃料或磷酸酯液体。如果零件会接触到燃料或磷酸酯液体,则使用70型粘合剂(SOPM 20-50-12)。
E. Clean the grommet with a clean cloth wet with a Series 98-1 solvent (SOPM 20-30-98).
用蘸有98-1系列溶剂(SOPM 20-30-98)的干净布清洁扣眼。
F. Apply a thin layer of the prepared adhesive to the grommet and the mating surface.
在扣眼和配合面上涂上一层薄薄的已准备好的粘合剂。
G. Install the grommet with the joint in the top half of the hole (Figure 3). Clean off unwanted adhesive with a clean cloth wet with a Series 98-1 solvent (SOPM 20-30-98).
将带接头的扣眼安装在孔的上半部分(图3)。用蘸有98-1系列溶剂(SOPM 20-30-98)的干净布清洁多余的粘合剂。
H. Cure the adhesive as specified in SOPM 20-50-12.
根据SOPM 20-50-12的规定固化粘合剂。
7. BACG20H CABLE GROMMETS 电缆扣眼BACG20H
A. Clean the area around the hole as specified in Paragraph 3.B.
按照第3.B段所述,清洁孔周围的区域。
B. Prepare some Type 12 adhesive as specified in SOPM 20-50-12.
按照SOPM 20-50-12的规定准备一些类型12的粘合剂。
C. Clean the grommet with a clean cloth wet with a Series 98-1 solvent (SOPM 20-30-98).
用蘸有98-1系列溶剂(SOPM 20-30-98)的干净布清洁扣眼。
D. Apply a thin layer of the adhesive to the grommet outside diameter and the hole inside diameter as shown in Figure 4.
在扣眼外径和孔内径上涂上一层薄薄的粘合剂,如图4所示。
E. Let the adhesive dry for 10-20 minutes, or until the adhesive is tacky but will not come off when touched.
让粘合剂干燥10-20分钟,或直到粘合剂变粘,但触摸时不会脱落。
F. Install the grommet as shown in Figure 4. Push all surfaces of the grommet down against the mating hole surfaces for a good bond. Remove unwanted adhesive with aliphatic naphtha.
如图4所示安装扣眼。将扣眼的所有表面压入配合孔表面,以实现良好的粘接效果。用脂肪烃石脑油清除多余的粘合剂。
G. You can use the assembly immediately. No cure time is necessary.
可以立即使用该组件。无需固化时间。
8. BACG20L ALUMINUM GROMMETS 铝扣眼BACG20L
A. Apply a layer of zinc chromate primer to the hole surfaces.
在孔表面涂上一层铬酸锌底漆。
B. Installation (Figure 5)
安装(图5)
(1) Install the grommet in the hole.
将扣眼安装在孔中。
(2) Use the tool to flare the grommet against the hole countersink.
使用工具将扣眼扩孔,使其与孔的沉头部分相吻合。
(3) Machine the grommet flush with the surface.
机加工扣眼,使其与表面齐平。
(4) Install the mating bolt with wet zinc chromate primer on the surfaces that will touch the grommet.
在与扣眼接触的表面安装带有湿锌铬酸盐底漆的配套螺栓。
(5) Apply other finishes to the unit as given in the overhaul instructions.
根据大修说明对装置进行其他表面处理。
