CN108943516B

CN108943516B - Manufacturing method of high-locking bolt sealing cap

Info

Publication number: CN108943516B
Application number: CN201810682884.1A
Authority: CN
Inventors: 林伟; 郑炜; 陈龑斌; 霍玥玥
Original assignee: Xian Aircraft Industry Group Co Ltd
Current assignee: Xian Aircraft Industry Group Co Ltd
Priority date: 2018-06-27
Filing date: 2018-06-27
Publication date: 2020-04-07
Anticipated expiration: 2038-06-27
Also published as: CN108943516A

Abstract

The invention provides a manufacturing method of a high-locking bolt sealing cap, which comprises a die, wherein the die consists of an upper die and a lower die, and a plurality of upper dies and lower dies are correspondingly and uniformly arranged along the length and width directions to form a multi-cavity die structure. Fixing the upper die, injecting sealant which has the same chemical composition as the sealing sealant or similar chemical composition and similar chemical property into the concave die cavity of the upper die, matching the conical die cavity of the lower die, manufacturing by adopting a die pressing process, considering that the sealant in the concave die cavity of the upper die is fully filled when uniform sealant is extruded from the periphery of the lower die, taking out the sealing cap after vulcanization is finished, and trimming the periphery to obtain the sealing cap which can be used.

Description

Manufacturing method of high-locking bolt sealing cap

Technical Field

The application relates to the technical field of aircraft part manufacturing, in particular to a manufacturing method of a high-locking bolt sealing cap.

Background

In the manufacturing and assembling process of an airplane, the sealing of the whole oil tank is a very critical link, the existing sealing process of the fastener excessively depends on the personal operating skills of workers for a long time, the failure rate is very high, common failures include glue shortage, glue leakage, air bubbles and the like, most bolts are positioned at parts which are not too open in the construction process, the construction difficulty is high, the quality is not easy to guarantee, especially certain standing positions which can only be used for sealing in a vertical placing posture, and the sealing effect is influenced because the flowing property of glue inevitably causes the collapse of a glue layer or the uneven thickness of the glue layer above and below the sealing. In addition, most bolt heads are not formed in a standard manner in the construction process, bolts with the same specification and height are large and small in size due to different constructors, the glue consumption cannot be accurately estimated, and waste is caused due to the fact that glue is applied and refined in advance and is often overproof in order to guarantee field use; the fastener package back can not obtain effectual protection, easily appear being infected with the aluminium bits when carrying out subsequent handling, fall on the dust etc. and be the contaminated condition, difficult clearance, current process method is complicated because construction environment, need be equipped with or self-control multiple rubber coating instrument according to structural shape and be of a great variety and mostly all be the disposable extravagant huge, and remaining glue in the instrument can't use also can cause the waste, can produce wire drawing phenomenon and can pollute other regions because glue at the rubber coating in-process, the later stage need use the solvent to clear up, workman's clearance work load is big, also can cause environmental pollution simultaneously.

Disclosure of Invention

In order to solve the problems, the application provides a manufacturing method of a high-locking bolt sealing cap.

The manufacturing method of the high-locking bolt sealing cap comprises a die, wherein the die mainly comprises an upper die and a lower die, the upper die is of a concave die cavity structure, a limiting shaft is arranged at the center of the top of a concave die cavity, a cushion block is arranged on the bottom surface of the concave die cavity, the lower die is of a stepped conical die core, a limiting hole is formed in the tip of the core and matched with the limiting shaft of the upper die, a boss in the middle of the lower die is a glue filling groove of the sealing cap, the fitting angle α of the upper die and the lower die is 30 degrees, and the manufacturing process:

1, respectively and uniformly arranging a plurality of upper dies and lower dies along the length and width directions to form a multi-cavity die structure;

2, fixing the upper die, injecting sealant which has the same chemical composition as the sealing agent or similar chemical composition and has similar chemical performance into the concave die cavity of the upper die, matching the conical die cavity of the lower die, manufacturing by adopting a die pressing process, considering that the sealant in the concave die cavity of the upper die is fully filled when the periphery of the lower die is uniformly extruded, taking out the sealing cap after vulcanization is finished, and trimming the periphery to obtain the sealing cap which can be used.

The sealing cap manufactured by the method has the following advantages:

1) the efficiency and the package quality are improved, the high-altitude bolt packages of the same specification are unified in standard, the failure rate is reduced, and a foundation is laid for later automation.

2) The labor intensity of workers is reduced, the packaging work does not depend on personal skills any more, and the quality requirement can be met through simple training.

3) The problem of uneven glue layer caused by glue flowing due to the influence of environmental conditions is reduced.

4) If follow-up work exists after the bolts are packaged, the bolts can be effectively protected, and the phenomena of secondary pollution, damage and rework caused by insufficient protection are greatly reduced.

5) The method reduces the use of a disposable gluing tool and the serious waste caused by inaccurate estimation and multiple application of glue.

Drawings

FIG. 1 is a cross-sectional view of the upper mold

FIG. 2 lower die sectional view

FIG. 3 is a schematic view of the upper and lower die installation

FIG. 4 schematic view of a sealing cap

FIG. 5 is a drawing for using a plurality of molds together

The numbering in the figures illustrates: sealing cap for 1

upper die

2, 3 limit shaft, 4 concave die cavity, 4 cushion block, 5 lower die, 6 boss, 7 limit hole and 8 limit hole

The specific implementation mode is as follows:

as shown in fig. 1-5, a method for manufacturing a high-locking bolt sealing cap comprises a mold, the mold mainly comprises an upper mold 1 and a lower mold 2, the upper mold 1 is a concave mold cavity 3 structure, a limiting shaft 2 is arranged at the center of the top of the concave mold cavity 3, a cushion block 4 is arranged on the bottom surface, the lower mold 5 is a stepped conical mold core, a limiting hole 7 is arranged at the core tip and matched with the limiting shaft 2 of the upper mold, a boss 6 in the middle of the lower mold is a glue filling groove of the sealing cap 8, the joint angle α of the upper mold and the lower mold is 30 °, and the manufacturing process comprises the following steps:

1, respectively and uniformly arranging a plurality of upper dies 1 and lower dies 5 along the length and width directions to form a multi-cavity die structure;

2, fixing the upper die 1, injecting a sealant which has the same chemical composition as the sealing sealant or similar chemical composition and has similar chemical performance into the concave die cavity 3 of the upper die, matching the conical die cavity of the lower die 5, manufacturing by adopting a die pressing process, considering that the sealant in the concave die cavity 3 of the upper die 1 is fully filled when the periphery of the lower die 5 is uniformly extruded, taking out the sealing cap 8 after vulcanization is completed, and trimming the periphery to obtain the sealing cap 8 which can be used.

In general, in field use, the sealant is squeezed directly into the sealing cap 8 until the sealant reaches the sealant-filled score line in the sealing cap, and then the cap is slowly and gradually pressed against the fastener end by slight rotational movement of the glued sealing cap 8. There is a continuous extrusion of glue along the periphery of the sealing cap 8, the cap is held in place until the sealant is no longer extruded from the glue outlet and under the sealing cap 8, at which point the entire base remains in contact with the structure, the sealing cap is considered to have completely sealed the fastener, the sealing cap tip is cleaned, and the glue that overflows the bottom is shaped with a scraper, and sealing of the fastener is complete. The method is suitable for the sealing of the fasteners in the aviation field, can be popularized in a large area in a plurality of machine types and parts, is also used for sealing of other articles, and has strong popularization.

Claims

1. The utility model provides a manufacturing method of high lock bolt sealing cap, its characterized in that includes a mould, and the mould mainly comprises last mould and lower mould two parts, goes up the mould and is concave die cavity structure, is equipped with spacing axle at concave die cavity top center, and the bottom surface is equipped with the cushion, and the lower mould is the conical mold core of echelonment, and the mold core point portion is equipped with a spacing hole, cooperatees with the spacing axle of last mould, and lower mould middle part boss is the filling glue groove of sealing cap, and last lower mould laminating angle α is 30, and the manufacturing process includes following step:

1-1, respectively and uniformly arranging a plurality of upper dies and lower dies along the length and width directions to form a multi-cavity die structure;

1-2, fixing the upper die, injecting a sealant which is the same as the sealing sealant or has similar chemical components and similar chemical properties into the concave die cavity of the upper die, then matching with the conical die core of the lower die, manufacturing by adopting a die pressing process, when the periphery of the lower die is uniformly extruded with the sealant, considering that the sealant in the concave die cavity of the upper die is fully filled, taking out the sealing cap after vulcanization is completed, and trimming the periphery to obtain the sealing cap which can be used.