A quick-release fixing device for polyester-rigid glued test pieces

Abstract

The present invention provides a quick-release fixing device for polyester-rigid glued test pieces, which solves the problems that components are prone to displacement during the curing stage of the shear test pieces of acrylate adhesives, or it is difficult to remove the test pieces after applying a covering mold. The device includes two fixing components, two limiting components, four mounting screws and four quick-release handles; the fixing components are in a "U" shape, with two short through holes 501 provided thereon, and are cross-mounted and fixed with the limiting components through these through holes, and a nail head depression 502 is provided on the lower end surface of the holes; another two long blind holes 503 are provided, and one right-angle protrusion 504 is provided at each corner; the limiting components are in a small "U" shape; two internally threaded short through holes 701 are provided thereon, and are cross-mounted and fixed with the fixing components through these through holes; another long through hole 702 is provided for meshing with the quick-release handle; the quick-release handle is a segmented rotating body, and its thinner section 901 meshes with the long through hole of the fixing component or the long through hole of the limiting component, and its thicker section 902 serves as a handle during quick-release disassembly.

Description

Technical Field

[0001] The present invention belongs to the field of aerospace technology, and particularly relates to a quick-release fixing device for polyester-steel glued test pieces. Background Art

[0002] Currently, for the cockpit glass of various types of aircraft, if a drilling design is adopted, acrylate adhesive needs to be used to bond polyester steel at the drilling positions (usually at the edge fixing positions of the glass transparent parts) to prevent the continuous development of fatigue cracks at the drilling positions. The bonding quality needs to be verified by preparing furnace-mounted shear test pieces for destructive testing.

[0003] As Figure 1 shown, this kind of test piece is composed of three sheet-like components, namely a glass substrate, a polyester-steel intermediate layer, and a glass attachment piece from bottom to top. During the curing stage, a certain pressure needs to be applied to the test piece through a fixture (see Figure 2 ) for fixed placement, or a wrapped mold is used for positioning during the curing stage (see Figure 3 ), and the test piece is made by extruding or knocking out the test piece after curing.

[0004] However, acrylate adhesive has fluidity before curing and plays a certain lubricating role between the components. If a fixture is directly used for pressure curing, displacement defects are likely to occur in the glass attachment piece or the polyester-steel intermediate layer during the curing stage, and the equivalence between the destructive test results of the cured polyester-steel glued test piece and the product quality cannot be guaranteed, violating the test principle. When a wrapped mold is used for positioning during the curing stage, after curing, an extrusion force or impact force needs to be applied to the small-area glass attachment piece of the test piece to take it out (see Figure 4 ), which is extremely likely to damage the glass attachment piece of the test piece. In the destructive shear test of this type of test piece, the end face of the glass attachment piece is the main load-bearing surface, and various damages here will affect the smooth progress of the shear test. Summary of the Invention

[0005] In view of this, the present invention proposes a quick-release fixing device for polyester-steel glued test pieces to solve the problems that the components are prone to displacement during the curing stage of the acrylate adhesive shear test piece, or the test piece is difficult to take out after applying a wrapped mold.

[0006] The present invention is realized through the following technical solutions.

[0007] A quick-release fixing device for polyester-steel glued test pieces includes 2 fixing components, 2 limiting components, 4 mounting screws, and 4 quick-release handles;

[0008] The fixing component is in a "U" shape, with 2 short through holes 501 provided thereon, and is cross-mounted and fixed with the limiting component through these through holes. The lower end face of the hole is provided with a nail head depression 502; another 2 long blind holes 503 are provided, and 1 right-angle protrusion 504 is provided at each corner;

[0009] The limiting component is in a small "U" shape; there are 2 short through holes with internal threads 701 on it, and it is fixedly installed crosswise with the fixing component through these through holes; another long through hole 702 is provided for meshing with the quick-release handle.

[0010] The quick-release handle is a segmented rotating body, and its thinner section 901 meshes with the long through hole of the fixing component or the long through hole of the limiting component, and its thicker section 902 serves as the grip when the quick-release disassembly is performed.

[0011] Advantages of the present invention:

[0012] 1. The overall structure after assembly of the present invention is in the form of a limiting mold, which can ensure that there is no relative displacement between components during the curing stage and guarantee the production quality of the shear test piece.

[0013] 2. The split quick-release design of the present invention can ensure that the test piece can be smoothly taken out without damage after curing, and guarantee the effectiveness of its destructive test.

[0014] 3. The present invention realizes the fixation of the glass substrate of the test piece through the alignment of 2 fixing components and the right-angle protrusions, reducing the contact area between the fixing component and the test piece. Description of the drawings

[0015] Figure 1 It is a composition diagram of the test piece components in the background technology;

[0016] Figure 2 It is a schematic diagram of applying pressure to the test piece in the background technology;

[0017] Figure 3 It is a schematic diagram of using a wrapped mold for limiting in the background technology;

[0018] Figure 4 It is a schematic diagram of taking out the glass attachment in the background technology;

[0019] Figure 5 : Schematic diagram of the fixing component parts

[0020] Figure 6 : Schematic diagram of the state of fixing the test piece after the fixing components are aligned

[0021] Figure 7 : Schematic diagram of the limiting component parts

[0022] Figure 8 : Schematic diagram of the screw parts

[0023] Figure 9 : Schematic diagram of the quick-release handle parts

[0024] Figure 10 : Schematic diagram of the main body of the fixing device formed after assembly

[0025] Figure 11 :Schematic diagram of the position status after positioning the test piece

[0026] Figure 12 : Schematic diagram of spring clip pressurized state

[0027] Figure 13 : Schematic diagram of disassembly of limit assembly

[0028] Figure 14 : Schematic diagram of disassembly of fixed components. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the embodiments shown and described in the accompanying drawings are only exemplary and are intended to illustrate the principles and spirit of the present invention, rather than to limit the scope of the present invention.

[0030] A quick-release polyester steel-bonded test piece fixing device of the present invention comprises two fixing components, two limiting components, four mounting screws and four quick-release handles;

[0031] like Figure 5 As shown, each fixing component has the same structure. The fixing component is "U"-shaped and has two short through holes 501 thereon. The fixing component is cross-mounted and fixed with the limiter component through the through holes. The lower end surface of the hole is provided with a nail head depression 502. Two long blind holes 503 are provided to engage with the quick-release handle to provide a fulcrum for quick-release disassembly after the test piece is cured. A right-angle protrusion 504 is provided at each corner to cooperate with one corner of the test piece glass substrate. Figure 6 As shown, the two fixing components are combined to form a rectangular frame structure, and the glass substrate of the test piece is fixed by the right-angle protrusions; this method reduces the contact area between the fixing component and the test piece.

[0032] like Figure 7 As shown, each limiting component has the same structure, and the limiting component is in a small "U" shape; two internal threaded short through holes 701 are provided thereon, through which the fixing component is cross-mounted and fixed; another long through hole 702 is provided for engaging with the quick-release handle to provide a fulcrum for quick-release disassembly after the test piece is cured; after the two limiting components are assembled, they are used to limit the polyester steel middle layer and the glass attachment of the test piece.

[0033] like Figure 8 As shown, each mounting screw has the same structure. In this embodiment, the mounting screw adopts a cylindrical head full-thread screw. In specific implementation, the thickness of the nail head of the mounting screw is not higher than the sinking depth of the short through hole of the fixing component, and its length is flush with the upper surface of the limit component after installation.

[0034] like Figure 9As shown, the quick-release handle is a segmented rotating body. Its thinner section 901 engages with the long through-hole of the fixed component or the long through-hole of the limit component, and its thicker section 902 serves as the grip when the quick-release is disassembled.

[0035] As Figure 10 shown, assemble the above components in the following specific manner: Place 2 pieces of the fixed components in alignment, take 2 pieces of the limit components, place them crosswise with the fixed components, align the mounting holes of 4 pieces of the mounting screws respectively, and take 4 pieces of mounting screws for assembly to form the main body of the fixing device.

[0036] The following details the specific steps for fixing the test piece according to the fixing device of the present invention:

[0037] As Figure 11 、 12 shown, take 1 piece each of the glass substrate, polyester intermediate layer, and glass attachment of the shear test piece, coat acrylate adhesive as required and complete the bonding; place the bonded test piece into the main body of the fixing device for limiting. At this time, the lower surface of the glass substrate and the upper surface of the glass attachment should both protrude slightly from the main body of the fixing device. Use an existing spring clip to apply pressure to it and cure it in the furnace as required;

[0038] As Figure 13 shown, after curing is completed, the test piece and the main body of the fixing device are in an adhesive state. After disassembling 4 pieces of mounting screws, fix the fixed component part of the main body of the fixing device. Specifically, in implementation, the fixing can be carried out manually with the quick-release handle, or other jigs can be selected for fixing. Take 2 pieces of quick-release handles and insert them into the long through-holes of 1 piece of the limit component, and use a transverse force with both hands to disassemble this limit component; disassemble the 2nd limit component in the same way.

[0039] As Figure 14 shown, take 4 pieces of quick-release handles and disassemble the 2 pieces of fixed components adhered together by the test piece in the same way; remove the test piece from the last 1 piece of fixed component, and the effects of preventing displacement during the curing stage of the test piece and preventing damage when the test piece is taken out after curing can be achieved.

[0040] Those of ordinary skill in the art will realize that the embodiments described herein are for helping readers understand the principles of the present invention, and it should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific deformations and combinations without departing from the essence of the present invention based on the technical revelations disclosed in the present invention, and these deformations and combinations are still within the protection scope of the present invention.

Claims

1. A fixing method for a quick-release polyester rigid glued test piece, and the fixing device used includes 2 fixing components, 2 limiting components, 4 mounting screws and 4 quick-release handles; the fixing components are in a "U" shape, with 2 short through holes (501) provided thereon, and are cross-mounted and fixed with the limiting components through these through holes, and a nail head depression (502) is provided on the lower end surface of the holes; another 2 long blind holes (503) are provided, and 1 right-angle protrusion (504) is provided at each corner; the limiting components are in a small "U" shape; 2 internal thread short through holes (701) are provided thereon, and are cross-mounted and fixed with the fixing components through these through holes; another 1 long through hole (702) is provided for meshing with the quick-release handle; the quick-release handle is a segmented rotating body, and its thinner section (901) meshes with the long blind hole of the fixing component or the long through hole of the limiting component, and its thicker section (902) serves as a grip when performing quick-release disassembly; It is characterized in that The specific steps are as follows: Take 1 piece each of the glass substrate, polyester rigid intermediate layer, and glass attachment piece of the shear test piece, coat with acrylate adhesive as required and complete bonding; place the bonded test piece into the main body of the fixing device for positioning. At this time, both the lower surface of the glass substrate and the upper surface of the glass attachment piece should protrude slightly from the main body of the fixing device. Apply pressure to it using an existing spring clip and cure it in the furnace as required; After curing is completed, the test piece and the main body of the fixing device are in an adhesive state. After disassembling 4 mounting screws, fix the fixing component part of the main body of the fixing device. Take 2 quick-release handles and insert them into the long through holes of 1 of the limiting components. Use a lateral force with both hands to disassemble the limiting component; disassemble the 2nd limiting component in the same way; Take 4 quick-release handles and disassemble the 2 fixing components adhered together through the test piece in the same way; remove the test piece from the last fixing component, and the effects of preventing displacement during the curing stage of the test piece and preventing damage when the test piece is taken out after curing can be achieved.

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