Composite material skirt axial compression test tool

Abstract

The utility model belongs to the technical field of aerospace, and particularly relates to a composite skirt axial compression test tool which comprises a supporting bottom plate. The supporting seat is detachably arranged at the top end of the supporting bottom plate, and the supporting seat is used for bearing the connecting skirt; the transfer mechanism is arranged on the supporting seat, and the transfer mechanism is used for transferring the axial compression test tool; and the auxiliary positioning mechanisms are arranged on the supporting bottom plate, located on the periphery of the outer side of the supporting base and used for fixing the connecting skirts of different sizes. The device is simple in structural form, convenient to disassemble and assemble, free of too many complex parts and capable of rapidly verifying performance indexes such as strength and rigidity of the composite skirt.

Description

TECHNICAL FIELD

[0001] The utility model belongs to aerospace technology field especially relates to a composite skirt axial compression test tool. BACKGROUND

[0002] The solid rocket engine composite material shell is generally composed of front / back joints, front / back skirts, winding layers and heat insulation structures, wherein the front / back skirts mainly play a connecting role in the missile structural parts and are usually subjected to tensile and compressive loads in the flight process. According to the structural characteristics of the skirt, the skirt can resist a relatively high tensile load, but a relatively large compressive load can easily lead to instability of the skirt structure. Therefore, during the development of new models, whether the design of the skirt structure can meet the strength requirements needs to be verified by performing an axial compression test on the skirt parts to detect the skirt strain displacement and other data and then verify the rationality of the design. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of composite skirt axial compression test tools, whether the skirt structure can meet the demand is examined.

[0004] To achieve the above object, the utility model provides the following scheme: a kind of composite skirt axial compression test tool, comprising

[0005] Supporting bottom plate;

[0006] Supporting seat, detachably set in the supporting bottom plate top end, the supporting seat is used to load connection skirt;

[0007] Transfer mechanism, set in the supporting seat, the transfer mechanism is used to transfer axial compression test tool;

[0008] Auxiliary positioning mechanism, set in the supporting bottom plate, the auxiliary positioning mechanism is located at the outside of the supporting seat four quarters, the auxiliary positioning mechanism is used to fix the connection skirt of different sizes.

[0009] Based on the utility model of a kind of composite skirt axial compression test tool, the auxiliary positioning mechanism includes several first fixed seats, the first fixed seat is fixedly connected with the supporting bottom plate top end, several the first fixed seat is circumferentially equidistantly set in the outside of the supporting seat, the first fixed seat and the gap between the outer side wall of the supporting seat, the first fixed seat is provided with second fixed seat on the side away from the supporting seat, the second fixed seat and the first fixed seat leave gap and are fixedly connected with the supporting bottom plate top end, the first fixed seat and the second fixed seat are jointly connected with adjusting rod between, the adjusting rod is fixedly connected with handle on the end away from the supporting seat, auxiliary positioning part is screw-connected on the adjusting rod, the auxiliary positioning part is located between the first fixed seat and the second fixed seat and the bottom end is slidably contacted with the supporting bottom plate top end.

[0010] The auxiliary positioning mechanism of the composite skirt shaft test tool is simple in structure, easy to process and form, convenient to disassemble and assemble, and has no too many complex parts.

[0011] The transfer mechanism of the composite skirt shaft test tool comprises a plurality of lifting lugs, the lifting lugs are fixedly connected to the outer side wall of the support seat, and the plurality of lifting lugs are arranged at equal intervals in the circumferential direction of the outer side wall of the support seat.

[0012] The support seat of the composite skirt shaft test tool is provided with a containing groove at the top end, and the connecting skirt is placed in the containing groove.

[0013] The support seat of the composite skirt shaft test tool is provided with a containing groove at the top end, and the connecting skirt is placed in the containing groove.

[0014] The support seat of the composite skirt shaft test tool is provided with a containing groove at the top end, and the connecting skirt is placed in the containing groove.

[0015] Compared with the prior art, the composite skirt shaft test tool has the following advantages and technical effects:

[0016] The shaft test tool is simple in structure, easy to process and form, convenient to disassemble and assemble, and has no too many complex parts. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor:

[0018] Figure 1 It is a whole schematic view of the present application;

[0019] Figure 2 It is a schematic view of the support base plate and the support seat of the present application;

[0020] Figure 3 It is the support baseplate schematic view of the utility model;

[0021] Figure 4 It is the support seat bottom schematic view of the utility model;

[0022] Figure 5 It is the connection skirt schematic view of the utility model bearing different sizes.

[0023] Wherein, 1, support baseplate;2, support seat;3, lug;4, first fixed seat;5, second fixed seat;6, adjusting rod;7, handle;8, slide;9, top rod;10, top ball;11, connection skirt;12, containing groove;13, positioning convex;14, bolt hole;15, positioning groove. Specific implementation

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0025] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the utility model will be further described in detail below in conjunction with the drawings and specific implementation.

[0026] Referring to Figures 1 to 5 The utility model provides a kind of composite skirt axial compression test tool, including

[0027] Support baseplate 1;

[0028] Support seat 2, detachably set in support baseplate 1 top end, and support seat 2 is used to carry connection skirt 11;

[0029] Transfer mechanism, it is set in support seat 2, and transfer mechanism is used to transfer axial compression test tool;

[0030] Auxiliary positioning mechanism, it is set in support baseplate 1, and auxiliary positioning mechanism is located in the outside four sides of support seat 2, and auxiliary positioning mechanism is used to fix different sizes of connection skirt 11.

[0031] Support baseplate 1 is used to support support seat 2, to prevent support seat 2 from sliding during test.

[0032] Further, the auxiliary positioning mechanism comprises a plurality of first fixing bases 4, the first fixing bases 4 are fixedly connected to the top end of the supporting bottom plate 1, the plurality of first fixing bases 4 are arranged at equal intervals in the circumferential direction on the outer side of the supporting base 2, a gap is left between the first fixing bases 4 and the outer side wall of the supporting base 2, the side, away from the supporting base 2, of the first fixing base 4 is provided with a second fixing base 5, a gap is left between the first fixing base 4 and the second fixing base 5, and the second fixing base 5 is fixedly connected to the top end of the supporting bottom plate 1, the first fixing base 4 and the second fixing base 5 are jointly and rotatably connected with an adjusting rod 6, the end, away from the supporting base 2, of the adjusting rod 6 is fixedly connected with a handle 7, and an auxiliary positioning part is threadedly connected to the adjusting rod 6, the auxiliary positioning part is located between the first fixing base 4 and the second fixing base 5 and is in sliding contact with the top end of the supporting bottom plate 1.

[0033] Further, the auxiliary positioning part comprises a sliding base 8, the sliding base 8 is threadedly connected with the adjusting rod 6, the sliding base 8 is located between the first fixing base 4 and the second fixing base 5 and is in sliding contact with the top end of the supporting bottom plate 1, the top end of the sliding base 8 is fixedly connected with a top rod 9, and the end, close to the supporting base 2, of the top rod 9 is fixedly connected with a top ball 10.

[0034] Further, the transferring mechanism comprises a plurality of lifting lugs 3, the lifting lugs 3 are fixedly connected with the outer side wall of the supporting base 2, and the plurality of lifting lugs 3 are arranged at equal intervals in the circumferential direction along the outer side wall of the supporting base 2.

[0035] The supporting base 2 is made of metal material, and the lifting lugs 3 are used for transferring the shaft pressure test tooling.

[0036] Further, the top end of the supporting base 2 is provided with an accommodating groove 12, and the connecting skirt 11 is placed in the accommodating groove 12.

[0037] Further, the top end of the supporting bottom plate 1 is fixedly connected with a positioning convex 13, the bottom end of the supporting base 2 is provided with a positioning groove 15, and the positioning convex 13 is matched with the positioning groove 15.

[0038] Further, the top end of the supporting bottom plate 1 is provided with a plurality of bolt holes 14, a plurality of mounting holes are formed in the supporting base 2, the bolt holes 14 and the mounting holes are one-to-one corresponding, and the mounting holes are detachably connected with the bolt holes 14 through connecting bolts.

[0039] The utility model also provides a kind of shaft pressure experimental method of composite material skirt shaft pressure test tooling, comprising the following steps:

[0040] Prepare connecting skirt 11;

[0041] Connecting skirt 11 test piece is formed by carbon fiber prepreg pasting and then curing by autoclave process, shape is annular, and there is inward flanging (called skirt end face) in ring one end.After curing, use numerical control equipment to process to theoretical size.

[0042] Prepare test tooling, install supporting base 2 on supporting bottom plate 1, then place on press;

[0043] The support seat 2 and the support base plate 1 are placed on the lower platform of the press.

[0044] The connecting skirt 11 is placed on the support seat 2 and fixed;

[0045] The connecting skirt 11 is installed in the accommodating groove 12 of the support seat 2, and then the gap between the connecting skirt 11 and the accommodating groove 12 is filled with normal temperature resin and normal temperature curing is performed. After curing is completed, the end surface of the connecting skirt 11 is ensured to be parallel to the upper platform of the press.

[0046] The side wall of the connecting skirt 11 is fixed through the auxiliary positioning mechanism;

[0047] The position of the top ball 10 is adjusted according to the diameter size of the connecting skirt 11. When adjusting, the adjusting rod 6 is rotated through the handle 7, the adjusting rod 6 drives the sliding seat 8 to move with the top rod 9 towards the connecting skirt 11, until all the top balls 10 are supported on the outer side wall of the connecting skirt 11.

[0048] The strain gauges and displacement sensors are arranged on the connecting skirt 11;

[0049] The strain gauges are arranged in mirror symmetry on the inner and outer sides of the side wall of the connecting skirt 11, 4 pairs on each side, and are distributed in 4 quadrants (one pair of strain gauges every 90°) of the connecting skirt 11, a total of 8 pairs of strain gauges. In the axial direction, the strain gauges are located in the middle of the column segment at a thickness of 15mm of the connecting skirt 11. One displacement sensor is arranged between every two pairs of strain gauges, located on the outer side of the side wall of the connecting skirt 11 (measuring circumferential displacement) and the upper surface (measuring axial displacement), a total of 8.

[0050] The connecting skirt 11 is subjected to loading force through the press;

[0051] The axial movement of the upper platform of the test press is controlled, and the load of the press is loaded to the end surface of the connecting skirt 11. During the test, it is ensured that the load is the axial load of the connecting skirt 11.

[0052] After the test is completed, the connecting skirt 11 is inspected.

[0053] After the test is completed, it is checked whether the test piece is damaged or destroyed, and according to the on-site situation, the test piece is nondestructively tested or dissected.

[0054] Further, when the connecting skirt 11 is subjected to a loading force by the press, 50KN load is taken as zero load, 100KN increment is loaded to 20% test load in stages, 3-5 seconds are kept after each stage of increase is completed, unloading is cleared, whether the strain and load transmission system is normal is checked, zero load is reset, 100KN increment is loaded to 100% test load in stages, 3-5 seconds are kept after each stage of increase is completed, unloading is cleared, zero load is reset, 100KN increment is loaded to 200% test load in stages, 3-5 seconds are kept after each stage of increase is completed, unloading is cleared.

[0055] In the description of the utility model, it is understood that the orientation or position relation indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0056] The above-described embodiments are only preferred modes of the utility model, and do not limit the scope of the utility model, and various modifications and improvements to the technical scheme of the utility model made by those skilled in the art without departing from the design spirit of the utility model should fall within the protection scope of the utility model.

Claims

1. A composite skirted axial compression test fixture, characterized by, The utility model provides a support base plate (1); Support seat (2) detachable arrangement in support base plate (1) top, support seat (2) is used for bearing connecting skirt (11); Transfer mechanism, be provided with on support seat (2), transfer mechanism is used for the transfer of shaft test tooling; Auxiliary positioning mechanism, be provided with on support base plate (1), auxiliary positioning mechanism is located support seat (2) outside four around, auxiliary positioning mechanism is used for the fixing of different size connecting skirt (11). The auxiliary positioning mechanism includes a plurality of first fixing seats (4), the first fixing seat (4) is fixedly connected with the top end of the support base plate (1), a plurality of first fixing seats (4) are circumferentially and equally spaced apart from the outside of the support seat (2), a gap is left between the first fixing seat (4) and the outer side wall of the support seat (2), a second fixing seat (5) is arranged on the side of the first fixing seat (4) away from the support seat (2), the second fixing seat (5) is fixedly connected with the top end of the support base plate (1) and has a gap with the first fixing seat (4), the first fixing seat (4) and the second fixing seat (5) are jointly connected with an adjusting rod (6), one end of the adjusting rod (6) away from the support seat (2) is fixedly connected with a handle (7), an auxiliary positioning part is threadedly connected to the adjusting rod (6), and the auxiliary positioning part is located between the first fixing seat (4) and the second fixing seat (5) and is in sliding contact with the top end of the support base plate (1).

2. A composite skirted axial compression test fixture according to claim 1, wherein, The auxiliary positioning part includes a sliding seat (8), the sliding seat (8) is threadedly connected with the adjusting rod (6), the sliding seat (8) is located between the first fixing seat (4) and the second fixing seat (5) and is in sliding contact with the top end of the support base plate (1), a top rod (9) is fixedly connected to the top end of the sliding seat (8), and a top ball (10) is fixedly connected to one end of the top rod (9) close to the support seat (2).

3. A composite skirted axial compression test fixture according to claim 2, wherein, The transfer mechanism includes a plurality of lifting lugs (3), the lifting lugs (3) are fixedly connected with the outer side wall of the support seat (2), and a plurality of lifting lugs (3) are circumferentially and equally spaced apart from the outer side wall of the support seat (2).

4. The composite skirted axial compression test fixture of Claim 1, wherein, A containing groove (12) is formed in the top end of the support seat (2), and the connecting skirt (11) is placed in the containing groove (12).

5. The composite skirted axial compression test fixture of Claim 1, wherein, A positioning convex (13) is fixedly connected to the top end of the support base plate (1), a positioning groove (15) is formed in the bottom end of the support seat (2), and the positioning convex (13) is matched with the positioning groove (15).

6. The composite skirted axial compression test fixture of Claim 1, wherein, A plurality of bolt holes (14) are formed in the top end of the support base plate (1), a plurality of mounting holes are formed in the support seat (2), the bolt holes (14) correspond to the mounting holes one by one, and the mounting holes are detachably connected with the bolt holes (14) through connecting bolts.

7. A composite skirted axial compression test fixture as defined in claim 4, wherein, ​

Images