Device for gluing inspection opening of oil tank

Abstract

The utility model belongs to the technical field of helicopter assembly fixture design, and relates to a device for gluing an inspection opening of an oil tank. The device comprises a bottom plate, a positioning template, a pressing plate, a positioning block, a step drill bushing and a conical positioning pin, step drill bushings are mounted on through holes, corresponding to bolt passing holes of the annular part, of the positioning template; the positioning template is placed on the bottom plate; the conical positioning pin is a cylindrical pin with a conical flange in the middle, and the lower part of the cylindrical pin is inserted into the step drill bushing and is in clearance fit with the step drill bushing; a conical flange of the conical positioning pin is in clearance fit with a bolt passing hole of which the upper part is inserted into the upper panel of the annular part; the positioning block is installed in a space formed by the bottom plate and an inner ring of the annular part, the outer surface of the positioning block is attached to the inner surface of the annular part to achieve positioning, and the positioning block is higher than the annular part; and the pressing plate is sleeved on the positioning block and covers the lower panel of the annular part.

Description

Technical Field

[0001] The utility model belongs to the technical field of helicopter assembly fixture design and relates to a device used for gluing an oil tank inspection port. Background Art

[0002] like Figure 1 As shown, the fuel tank inspection port consists of a ring 1', a cover 2', and a handle 3'. The ring and cover are screwed together by a threaded fit, and the handle is fixed to the cover by a locating pin, so the cover and handle are not glued together. The panel consists of an upper panel 4', a lower panel 5', and an aluminum honeycomb 6'. The three parts are glued together by applying glue, adhesive film, etc. The area where the fuel tank inspection port is glued to the panel is filled with foam glue 7', and then glued to the inside of the panel at the same time. Currently, existing devices have difficulty in ensuring the position of the bolt through hole 8', and there is serious glue overflow, making demolding difficult. Utility Model Content

[0003] Purpose of the utility model: The utility model provides a device for gluing the inspection port of a fuel tank, which solves the problems of serious glue overflow and difficulty in demoulding.

[0004] Technical Solution

[0005] Provided is a device for gluing a fuel tank inspection port, comprising: a base plate, a positioning plate, a pressure plate, a positioning block, a stepped drill sleeve, and a tapered positioning pin;

[0006] A step drill sleeve is installed on the through hole on the positioning plate corresponding to the bolt through hole of the annular part; the positioning plate is placed on the base plate; the tapered positioning pin is a cylindrical pin with a tapered flange in the middle, and the lower part of the cylindrical pin is inserted into the step drill sleeve, and the two are clearance-matched; the tapered flange and upper part of the tapered positioning pin are inserted into the bolt through hole of the upper panel of the annular part, and the two are clearance-matched; the positioning block is installed in the space formed by the base plate and the inner ring of the annular part, and the outer surface of the positioning block fits with the inner surface of the annular part to achieve positioning, and the positioning block is higher than the annular part; the pressure plate is sleeved on the positioning block to cover the lower panel of the annular part.

[0007] The spaces between the holes where the bolts of the ring parts pass through are filled with foam.

[0008] The positioning block is locked on the base plate through a step bushing and a positioning pin.

[0009] The positioning block has a cross-shaped structure.

[0010] The sum of the heights of the middle and upper parts of the tapered locating pin is 0-2 mm higher than the height of the inclined surface where the bolt through hole of the annular part is located.

[0011] A blind hole for avoiding a stepped drill sleeve is provided on the bottom plate.

[0012] Beneficial effects:

[0013] The device has accurate and reliable positioning, solves the problem of serious glue overflow, reduces the accumulation of glue nodules, and improves the gluing quality of the mouth ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the fuel tank inspection port, where the port ring is the annular part.

[0015] Figure 2 The figure is a schematic diagram of the structure of a device for gluing the inspection port of a fuel tank;

[0016] Among them: 1. Base plate, 2. Positioning plate, 3. Press plate, 4. Positioning block, 5. Step bushing, 6. Positioning pin, 7. Step drill sleeve, 8. Tapered positioning pin. DETAILED DESCRIPTION

[0017] The utility model provides a device for gluing the inspection port of a fuel tank, such as Figure 2 As shown, it includes a base plate 1, a positioning plate 2, a pressure plate 3, a positioning block 4, a step bushing 5, a positioning pin 6, a step drill sleeve 7, and a tapered positioning pin 8. Since this type of gluing uses a medium-temperature adhesive, the device has certain requirements for heating and pressurizing.

[0018] A step drill sleeve is installed on the through hole on the positioning plate corresponding to the bolt through hole of the annular part; the positioning plate is placed on the base plate; the tapered positioning pin is a cylindrical pin with a tapered flange in the middle, and the lower part of the cylindrical pin is inserted into the step drill sleeve, and the two are clearance-matched; the tapered flange and upper part of the tapered positioning pin are inserted into the bolt through hole of the upper panel of the annular part, and the two are clearance-matched; the positioning block is installed in the space formed by the base plate and the inner ring of the annular part, and the outer surface of the positioning block fits with the inner surface of the annular part to achieve positioning, and the positioning block is higher than the annular part; the pressure plate is sleeved on the positioning block to cover the lower panel of the annular part.

[0019] Positioning principle: The panel and the mouth ring are placed on the positioning plate, and the two are positioned by the positioning block, that is, the positioning block passes through the panel hole and the mouth ring hole and is fixed to the base plate through the positioning pin. At the same time, the panel and the mouth ring are assisted in positioning with bolts through the holes, that is, the panel and the mouth ring are fixed to the positioning plate with the bolts through the holes using tapered positioning pins.

[0020] Assembly process: first place the upper panel on the positioning plate; then insert the conical positioning pin into the step drill sleeve (the step drill sleeve is installed on the positioning plate); then wrap the surrounding area of ​​the mouth ring with foam glue, align its upper hole with the conical positioning pin, insert it and place the whole on the positioning plate (the conical surface of the conical positioning pin cooperates with the conical surface of the mouth ring to block the glue, and secondly, the end of the conical positioning pin extending into the mouth ring hole should not be too long, otherwise it will be difficult to remove due to adhesion of foam glue); then pass the positioning block through the mouth ring and the positioning plate in turn, and fix it to the bottom plate through the positioning pin, so that the positioning of the mouth ring is completed; then assemble the aluminum honeycomb and the lower panel in place in turn, and place the pressure plate on the lower panel, which is conducive to uniform pressure; then evacuate and heat into the furnace for curing; finally, remove the mold. When removing the mold, first use a punch to punch out the conical positioning pin, and then use the step drill sleeve installed on the positioning plate to remove the foam glue filled in the bolt hole.

[0021] The edge of the positioning block is fitted with the inner wall of the mouth ring, the step bushing is installed thereon, and the positioning pin passes through the step bushing and is fixed to the bottom plate, thereby forming the main positioning of the mouth ring.

[0022] The positioning template acts as a platform (its flatness meets certain requirements), upon which the panel and inspection cover are placed. The stepped drill sleeve is also mounted. This stepped drill sleeve, while mating with the tapered locating pins, assists in positioning the mating ring and serves as a drill sleeve to facilitate drilling through the bolt holes after mold removal. The pressure plate, placed on the panel, provides uniform pressure during gluing and molding. Like the positioning template, it also features holes for the positioning blocks. The positioning template and other positioning components are placed on the base plate, providing a seal for vacuum extraction.

Claims

1. A device for gluing a fuel tank inspection port, characterized in that: include: Base plate (1), positioning plate (2), pressing plate (3), positioning block (4), stepped drill sleeve (7), tapered positioning pin (8); A step drill sleeve (7) is installed on a through hole on the positioning plate (2) corresponding to the bolt through hole of the annular part; the positioning plate (2) is placed on the bottom plate (1); the tapered positioning pin (8) is a cylindrical pin with a tapered flange in the middle, and the lower part of the cylindrical pin is inserted into the step drill sleeve (7), and the two are clearance-matched; the tapered flange and the upper part of the tapered positioning pin (8) are inserted into the bolt through hole of the upper panel of the annular part, and the two are clearance-matched; the positioning block (4) is installed in a space formed by the bottom plate (1) and the inner ring of the annular part, and the outer surface of the positioning block (4) is fitted with the inner surface of the annular part to achieve positioning, and the positioning block (4) is higher than the annular part; the pressing plate (3) is sleeved on the positioning block (4) to cover the lower panel of the annular part.

2. The device according to claim 1, characterized in that The spaces between the holes where the bolts of the ring parts pass through are filled with foam.

3. The device according to claim 1, characterized in that The positioning block is locked on the base plate through a step bushing (5) and a positioning pin (6).

4. The device according to claim 3, characterized in that The positioning block has a cross-shaped structure.

5. The device according to claim 1, characterized in that The sum of the heights of the middle and upper parts of the tapered positioning pin (8) is 0-2 mm higher than the height of the inclined surface where the bolt through hole of the annular part is located.

6. The device according to claim 3, characterized in that A blind hole for avoiding a stepped drill sleeve (7) is provided on the bottom plate (1).

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