Composite material compression test piece positioning tool

Abstract

The utility model discloses a composite material compression test piece positioning tool which comprises a positioning block assembly, the positioning block assembly comprises an upper positioning block and a lower positioning block, and opposite plate surfaces of the upper positioning block and the lower positioning block are respectively provided with positioning raised lines corresponding to an upper notch and a lower notch; reinforcing sheet placing areas are respectively formed on two sides, corresponding to the positioning raised lines, of the upper positioning block and the lower positioning block; the baffle assembly comprises a left side baffle and a right side baffle, and the left side baffle and the right side baffle are arranged on the left side and the right side of the positioning block assembly respectively and connected with the upper positioning block and the lower positioning block through fasteners respectively; the positioning pin assembly comprises a plurality of positioning pins, a plurality of vertically corresponding positioning grooves are formed in the front ends and the rear ends of the upper positioning block and the lower positioning block respectively, and the positioning pins are inserted into the corresponding positioning grooves. According to the utility model, the symmetry of two reinforcing sheets is ensured, the stability of the reinforcing sheets in the positioning process is ensured, and the precision of a test piece is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to composite material compression test piece positioning technical field, specifically relates to a kind of composite material compression test piece positioning tool. BACKGROUND

[0002] In the field of aerospace, carbon fiber reinforced resin matrix composite material has been extremely widely cited owing to its light weight, high strength, high stiffness / mass ratio and excellent corrosion resistance. In structural design and application, the compression strength of composite material is one of the important parameters. As shown in the figure, the current composite material compression test piece (1) usually has a mother plate (12) and upper and lower reinforcing sheets symmetrically bonded to its upper and lower surfaces, and the upper and lower reinforcing sheets have upper and lower notches exposing their upper and lower surfaces. The position accuracy of reinforcing sheet (11) has a significant impact on compression test data, therefore, improving the accuracy of composite material compression test piece is crucial to ensure the reliability of compression test data. Figure 1

[0003] Currently, there are two ways to prepare composite material compression test pieces in China. One is to use manual positioning method, that is, to determine the relative position of mother plate (12) and reinforcing sheet (11) by manual method, and then to fix it with positioning bar before gluing and curing. However, this method has obvious defects in operation, as it relies too much on manual operation, which cannot guarantee the symmetry of reinforcing sheet (11) on both sides of mother plate (12), affecting the accuracy of subsequent compression test piece (1). The second is to use existing positioning tool for auxiliary positioning, that is, to connect and position by opening groove on the bottom plate and cover plate and using positioning pin. However, this method still has the problem of insufficient positioning accuracy, as it can only achieve rough positioning of reinforcing sheet (11) in left and right directions, lacks precise constraint in front and back directions, and cannot ensure the symmetry of reinforcing sheet (11) on the upper and lower surfaces of mother plate.

[0004] Therefore, there is an urgent need for a composite material compression test piece positioning tool. UTILITY MODEL CONTENT

[0005] In view of the deficiencies in the prior art, the utility model provides a composite material compression test piece positioning tool.

[0006] The utility model discloses a composite material compression test piece positioning tool, the compression test piece includes mother plate and the upper and lower reinforcing sheets symmetrically bonded on its upper and lower surfaces, and the upper and lower reinforcing sheets are respectively provided with the upper and lower notches exposing the mother plate between the upper and lower reinforcing sheets, and the positioning tool comprises:

[0007] ​The positioning block assembly comprises an upper positioning block and a lower positioning block, and the upper positioning block and the lower positioning block are respectively provided with upper and lower notched positioning protrusions on opposite plate surfaces thereof.

[0008] The baffle assembly comprises a left baffle and a right baffle, and the left baffle and the right baffle are respectively arranged on the left and right sides of the positioning block assembly and are connected with the upper positioning block and the lower positioning block through fasteners.

[0009] The positioning pin assembly comprises a plurality of positioning pins, and the upper positioning block and the lower positioning block are respectively provided with a plurality of upper and lower corresponding positioning grooves at front and rear ends thereof.

[0010] As a further improvement of the utility model, the axis direction of the upper and lower positioning protrusions is parallel to the extension direction of the baffle assembly.

[0011] The upper and lower positioning protrusions respectively symmetrically divide the upper positioning block and the lower positioning block into two reinforcing sheet placement areas.

[0012] As a further improvement of the utility model, the height of the upper and lower positioning protrusions is matched with the thickness of the reinforcing sheet.

[0013] As a further improvement of the utility model, a plurality of fixing holes are arranged at intervals along the length direction of the left baffle and the right baffle, and the fixing holes are long strip-shaped holes extending along the height direction of the left baffle and the right baffle.

[0014] The upper and lower fasteners are respectively connected with the upper positioning block and the lower positioning block after penetrating through the fixing holes.

[0015] As a further improvement of the utility model, the fastener is a bolt.

[0016] As a further improvement of the utility model, the positioning grooves comprise upper positioning grooves and lower positioning grooves.

[0017] A plurality of upper positioning grooves are symmetrically arranged at front and rear ends of the upper positioning block, and a plurality of lower positioning grooves are symmetrically arranged at front and rear ends of the lower positioning block; the plurality of upper positioning grooves and the plurality of lower positioning grooves at the same end are arranged in one-to-one correspondence in the vertical direction.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The utility model discloses a positioning block assembly is set, is equipped with the positioning convex strip corresponding with the upper and lower slot and the strengthening sheet placement area of positioning convex strip both sides on the opposite board surface of its upper and lower positioning block, realizes the accurate positioning of the female board and strengthening sheet, solves the problem that manual positioning method can not guarantee the symmetry of two -sided strengthening sheet, improves test piece precision.

[0020] The utility model discloses a baffle assembly is set, is equipped with the positioning block assembly left and right sides, and is connected with upper and lower positioning block through fastener, realizes the stable fixing of positioning block assembly and test piece, further ensures the stability of strengthening sheet in the positioning process, helps to improve test piece precision.

[0021] The utility model discloses a positioning pin assembly is set, and the corresponding positioning slot of upper and lower is set respectively in the front and back of upper and lower positioning block, and the positioning pin is inserted in the corresponding positioning slot, realizes the accurate alignment of upper and lower positioning block, guarantees the accuracy of strengthening sheet and female board positioning process, thereby guaranteeing test piece precision. DRAWINGS

[0022] Figure 1 It is the schematic view of composite material compression test piece;

[0023] Figure 2 It is the structure schematic view of the positioning tool of composite material compression test piece disclosed in an embodiment of the utility model;

[0024] Figure 3 It is the structure schematic view of the upper positioning block and lower positioning block of the positioning tool of composite material compression test piece disclosed in an embodiment of the utility model.

[0025] In the drawing:

[0026] 1, compression test piece;11, strengthening sheet;12, female board;

[0027] 2, positioning tool;21, upper positioning block;22, lower positioning block;23, left baffle;24, right baffle;25, bolt;26, positioning pin;27, positioning convex strip;28, positioning slot. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiment of the utility model, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0029] In the description of the utility model, it needs to explain that, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and so on indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the utility model, it also needs to explain that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] The utility model will be described in further detail below in combination with the drawings:

[0032] As Figure 2 As shown in the utility model, the positioning tool for composite material compression test piece, the positioning tool is for composite material compression test piece, the compression test piece 1 includes the upper and lower reinforcing sheets 11 symmetrically bonded on the upper and lower surfaces of the mother plate 12, and the upper and lower grooves are respectively provided between the upper and lower reinforcing sheets to expose the mother plate 12. The positioning tool bag 2 comprises a positioning block assembly, a baffle assembly and a positioning pin assembly, wherein the positioning block assembly comprises an upper positioning block 21 and a lower positioning block 22, the opposite surfaces of the upper positioning block 21 and the lower positioning block 22 are respectively provided with positioning protrusions 27 for forming the upper and lower grooves, and the upper positioning block 21 and the lower positioning block 22 form reinforcing sheet placement areas corresponding to the two sides of the positioning protrusions 27; the baffle assembly comprises a left baffle 23 and a right baffle 24, the left baffle 23 and the right baffle 24 are respectively arranged on the left and right sides of the positioning block assembly, and are connected with the upper positioning block 21 and the lower positioning block 22 through fasteners; the positioning pin assembly comprises a plurality of positioning pins 26, the front and rear ends of the upper positioning block 21 and the lower positioning block 22 are respectively provided with a plurality of corresponding positioning grooves 28, and the positioning pins 26 are inserted into the corresponding positioning grooves 28.

[0033] In this embodiment, by setting a positioning block assembly, positioning protrusions 27 corresponding to the upper and lower slots are provided on the plate surfaces opposite to the upper and lower positioning blocks, and reinforcing sheet placement areas are provided on both sides of the positioning protrusions 27. This achieves precise positioning of the mother plate 12 and the reinforcing sheet 11, solves the problem that the manual positioning method cannot guarantee the symmetry of the two reinforcing sheets, and improves the accuracy of the test piece. By setting a baffle assembly, which is set on the left and right sides of the positioning block assembly and connected to the upper and lower positioning blocks by fasteners, the positioning block assembly and the test piece are firmly fixed, further ensuring the stability of the reinforcing sheet during the positioning process and helping to improve the accuracy of the test piece. By setting a positioning pin assembly, corresponding positioning slots 28 are set at the front and rear ends of the upper and lower positioning blocks respectively, and positioning pins 26 are inserted into the corresponding positioning slots 28. This achieves precise alignment of the upper and lower positioning blocks, ensuring the accuracy of the reinforcing sheet 11 and the mother plate 12 in the overall positioning process, thereby ensuring the accuracy of the test piece.

[0034] Specifically:

[0035] like Figure 3 As shown, in the above embodiment, preferably, the axial direction of the upper and lower positioning protrusions 27 is parallel to the extension direction of the baffle assembly; the upper and lower positioning protrusions 27 symmetrically divide the upper positioning block 21 and the lower positioning block 22 into two reinforcing plate placement areas respectively. In this embodiment, the upper and lower positioning protrusions 27 are used to position the reinforcing plate 11, and at the same time, they form upper and lower grooves on the upper and lower surfaces of the prepared compression test piece 1.

[0036] In the above embodiments, preferably, the heights of the upper and lower positioning protrusions 27 are adapted to the thickness of the reinforcing sheet. In this embodiment, the heights of the upper and lower positioning protrusions 27 are consistent with the thickness of the reinforcing sheet.

[0037] In the above embodiments, preferably, the upper and lower positioning protrusions 27 are positioned symmetrically on the upper positioning block 21 and the lower positioning block 22.

[0038] like Figure 2 As shown, in the above embodiment, preferably, the left baffle 23 is provided with a plurality of fixing holes at intervals along its length direction, and the fixing holes are elongated holes extending along the height direction of the left baffle 23; the right baffle 24 is provided with a plurality of fixing holes at intervals along its length direction, and the fixing holes are elongated holes extending along the height direction of the right baffle 24; in actual assembly, the left baffle 23 and the right baffle 24 are respectively placed on the left and right sides of the upper positioning block 21 and the lower positioning block 22, and the upper and lower fasteners pass through the fixing holes and are connected to the corresponding upper positioning block 21 and lower positioning block 22.

[0039] In the above embodiments, preferably, the fastener is a bolt 25.

[0040] In this embodiment, the fixing hole is in the form of a long strip hole, which extends along the height direction of the left side baffle 23, and can meet the adjustment of the distance between the upper positioning block 21 and the lower positioning block 22, so as to meet the positioning work of the reinforcing sheet 11 and the mother plate 12 of different thicknesses, and increase the practicability and expand the application range of the product.

[0041] As shown in the above embodiment, preferably, the positioning groove 28 comprises an upper positioning groove and a lower positioning groove; a plurality of upper positioning grooves are symmetrically arranged at the front and rear ends of the upper positioning block 21, and a plurality of lower positioning grooves are symmetrically arranged at the front and rear ends of the lower positioning block 22; the plurality of upper positioning grooves and the plurality of lower positioning grooves at the same end are arranged one by one in the vertical direction. The plurality of positioning pins 26 respectively pass through the one-to-one corresponding upper positioning grooves and lower positioning grooves, so as to realize the quick positioning and assembly of the upper positioning block 21 and the lower positioning block 22. Figures 2-3

[0042] In the above embodiment, preferably, the size of the positioning groove 28 can be adjusted according to the size of the compression test piece 1.

[0043] The use method of the embodiment is as follows:

[0044] 1. Clean the mother plate 12 and the four reinforcing sheets 11 of the compression test piece 1 with a cloth dipped in acetone;

[0045] 2. Paste the four reinforcing sheets 11 with the film, and place them in the corresponding reinforcing sheet placement area of the upper positioning block 21 and the lower positioning block 22, and combine them with the mother plate 12;

[0046] 3. Install the positioning pin 26 into the positioning groove 28 of the upper positioning block 21 and the lower positioning block 22;

[0047] 4. Connect the left side baffle 23, the right side baffle 24, the upper positioning block 21 and the lower positioning block 22 by using the bolt 25, so that the reinforcing sheet 11 completely adheres to the positioning protrusions 27 of the upper positioning block 21 and the lower positioning block 22, and then ensure the symmetry of the reinforcing sheet 11;

[0048] 5. Take out the positioned compression test piece 1 from the positioning tool 2 to complete the positioning work of the mother plate 12 and the four reinforcing sheets 11;

[0049] 6. Wrap the adhesive release cloth around the positioning ridge, and place it in the upper and lower groove positions of the compression test piece 1, so as to prevent the displacement of the reinforcing sheet 11 during the gluing and curing process;

[0050] 7. Paste the adhesive release cloth around the compression test piece 1 to prevent displacement of the reinforcing sheet 11 during the gluing and curing process, and prevent the generation of overflow glue problem;

[0051] ​8. After placing the compression test piece 1 outside the release film, the air-permeable felt and the vacuum bag, the compression test piece 1 is placed in the autoclave for glue curing;

[0052] 9. After the glue curing is completed, the release film, the air-permeable felt and the vacuum bag are removed, the positioning stoppers are taken out, the adhesive release cloth pasted around the compression test piece 1 is removed, and the glue curing process of the compression test piece 1 is completed.

[0053] The preferred embodiments of the utility model are merely used for limiting the utility model, and the utility model can be changed and varied for the person skilled in the art. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A positioning tool for a composite material compression test piece, the compression test piece comprising a base plate and upper and lower reinforcing sheets symmetrically bonded to upper and lower surfaces of the base plate, upper and lower notches exposing the base plate being respectively provided between the upper reinforcing sheets and between the lower reinforcing sheets, characterized in that, The positioning tool comprises: a positioning block assembly comprising an upper positioning block and a lower positioning block, the upper positioning block and the lower positioning block being respectively provided with positioning protrusions for forming upper and lower notches on opposite plate surfaces thereof, the upper positioning block and the lower positioning block being respectively provided with strengthening sheet placement areas corresponding to two sides of the positioning protrusions; a baffle assembly comprising a left baffle and a right baffle, the left baffle and the right baffle being respectively arranged on left and right sides of the positioning block assembly and being respectively connected to the upper positioning block and the lower positioning block through fasteners; a positioning pin assembly comprising a plurality of positioning pins, the upper positioning block and the lower positioning block being respectively provided with a plurality of upper and lower corresponding positioning slots at front and rear ends thereof, the positioning pins being inserted into the corresponding positioning slots.

2. The composite material compression test piece positioning tool according to claim 1, characterized by, The axis direction of the upper and lower positioning protrusions is parallel to the extension direction of the baffle assembly. The upper and lower positioning protrusions respectively symmetrically divide the upper positioning block and the lower positioning block into two strengthening sheet placement areas.

3. The composite material compression test piece positioning tool according to claim 2, characterized by, The height of the upper and lower positioning protrusions is adapted to the thickness of the strengthening sheet.

4. The composite material compression test piece positioning tool according to claim 1, characterized by, The left baffle and the right baffle are respectively provided with a plurality of fixing holes along the length direction thereof, and the fixing holes are long strip-shaped holes extending along the height direction of the left baffle and the right baffle. The upper and lower fasteners are respectively connected to the upper positioning block and the lower positioning block after passing through the fixing holes.

5. The composite material compression test piece positioning tool according to claim 4, characterized by, The fastener is a bolt.

6. The composite material compression test piece positioning tool according to claim 1, characterized by, The positioning slots comprise upper positioning slots and lower positioning slots. The plurality of upper positioning slots are symmetrically arranged at the front and rear ends of the upper positioning block, and the plurality of lower positioning slots are symmetrically arranged at the front and rear ends of the lower positioning block; the plurality of upper positioning slots and the plurality of lower positioning slots at the same end are one-to-one corresponding arranged in the vertical direction.

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