Assembly line type test piece tool for thermal shock loading test

Abstract

The utility model discloses an assembly line type test piece tool for a thermal shock loading test, which comprises a test mold main body, a push rod and two C-shaped test piece clamping pieces, and the two test piece clamping pieces are fixed on the test mold main body through clamping fixing pieces; a lower push rod hole and an upper push rod groove are sequentially formed in the test mold body from bottom to top, the lower push rod hole is communicated with the upper push rod groove, the top of the upper push rod groove is communicated with the outside, and test piece supporting strips are arranged on the inner walls of the two sides of the upper push rod groove. The two test piece clamping pieces are arranged on the test mold main body and form the columnar storage cavity, the test pieces are stacked in the columnar storage cavity, the columnar storage cavity is similar to a clip and can continuously convey the test pieces to the upper push rod groove of the test mold main body, and the test pieces can be continuously conveyed to the upper push rod groove of the test mold main body through the matched push rod. Therefore, the test pieces at the bottom of the columnar storage cavity are pushed out to the next test link one by one, and flow-line operation of the test pieces is realized.

Description

Technical Field

[0001] The utility model relates to the field of thermal shock tests of ceramic materials, in particular to a flow-type test piece tooling for thermal shock loading tests. Background Art

[0002] Ceramic materials, due to their high melting point and excellent chemical and physical stability at high temperatures, are widely used in high-temperature structures, such as thermal protection materials for hypersonic vehicles and the hot ends of engines. However, due to their inherent brittleness, ceramics have poor thermal shock resistance. Ceramic materials used in high-temperature structures, particularly in aerospace, are often damaged by severe thermal shock in their operating environments. Therefore, studying the thermal shock resistance of ceramic materials is essential and important.

[0003] In traditional ultra-high temperature material thermal shock resistance testing, creating the target high temperature environment takes a long time (typically >3 hours to achieve an environment above 1600°C). Typically, only one specimen can be tested at a time, far from meeting current research and evaluation requirements for ultra-high temperature material thermal shock resistance. Therefore, it is necessary to develop a flow-type specimen fixture that can conduct batch thermal shocks and achieve higher testing efficiency. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a flow-type test piece fixture capable of performing batch thermal shock and thermal shock loading tests with higher test efficiency.

[0005] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the utility model is: it includes a test mold main body, a push rod and two C-shaped test specimen clamps, the two test specimen clamps are arranged relative to each other to form a columnar storage cavity for accommodating the test specimen, and the two test specimen clamps are fixed to the test mold main body by clamping fixtures; the test mold main body is provided with a lower push rod hole and an upper push rod groove from bottom to top, the lower push rod hole is connected to the upper push rod groove, the top of the upper push rod groove is connected to the outside, the lower push rod hole and the upper push rod groove are arranged along the length direction of the test mold main body, and the inner walls on both sides of the upper push rod groove are provided with test specimen support bars, and the width of the columnar storage cavity is the same as the width of the upper push rod groove.

[0006] Furthermore, a vertical clamping groove for placing the specimen is provided on the clamping side of the specimen clamping piece, and a transverse clamping groove is provided on the fixing side of the specimen clamping piece.

[0007] Furthermore, the clamping fixture includes a clamping body, which is provided with a clamping protrusion that cooperates with the specimen clamping piece, and the clamping body is provided with two countersunk screw holes. The test mold body is provided with screw holes that cooperate with the countersunk screw holes, and the clamping fixture is fixedly connected to the test mold body by screws.

[0008] Furthermore, the bottoms of the specimen clamping member and the clamping fixture are both provided with specimen openings that match the specimen, and the specimen openings match the specimen clearance.

[0009] Furthermore, a rectangular opening for installing a specimen clamp is provided on the test mold body, and stress release holes are provided at the four corners of the rectangular opening.

[0010] Furthermore, the upper push rod groove includes a specimen sliding section and a push rod guide sliding section connected in sequence. The push rod guide sliding section is arranged on a side close to the push rod. The width of the specimen sliding section is greater than the width of the push rod guide sliding section. The width of the specimen sliding section is greater than or equal to the width of the specimen. A push rod guide portion is also provided at the open end of the push rod guide sliding section.

[0011] Furthermore, fixed edges are provided on both sides of the test mold body, and a plurality of fixed openings are provided on each fixed edge. The fixed openings are semicircular, and the test mold body and the fixed edges are designed as one body.

[0012] Furthermore, the push rod includes a push rod body that cooperates with the lower push rod hole, a guide head is provided on the front side of the push rod body, the cross-section of the guide head is an isosceles trapezoidal shape, a specimen push strip that cooperates with the upper push rod groove is provided on the top of the push rod body, the specimen push strip is a linear convex strip, and an installation hole is provided on the rear side of the push rod body.

[0013] Furthermore, the test mold body, the specimen clamping piece, the clamping fixture and the push rod are all made of graphite.

[0014] Furthermore, the specimen support bar is integrally formed with the test mold body.

[0015] The beneficial effects of the utility model are:

[0016] The test mold body of the utility model is provided with two specimen clamping parts, which form a columnar storage cavity. The specimens are stacked and placed in the columnar storage cavity. The columnar storage cavity is similar to a magazine and can continuously transport the specimens to the upper push rod groove of the test mold body. Through the coordinated push rod, the specimens at the bottom of the columnar storage cavity can be pushed out one by one to the next test link, thereby realizing the flow-line operation of the specimens.

[0017] The columnar storage chamber of the utility model can cooperate with the continuous feeding of the test piece to realize the flow-through test of the test piece in the thermal shock test, thereby significantly improving the efficiency of the thermal shock test of the test piece.

[0018] The push rod of the utility model is provided with a linear convex strip, and the test piece can be pushed out through the front side of the linear convex strip. When the push rod retracts and retreats, the linear convex strip slides on the bottom of the test piece and will not drive the test piece to move. When the push rod is retracted and extended again, the front side of the linear convex strip can push out the test piece at the bottom, thereby realizing the flow-type pushing operation of the test piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 Schematic diagram of the structure of the test mold body Figure 1 ;

[0021] Figure 3 Schematic diagram of the structure of the test mold body in another direction Figure 1 ;

[0022] Figure 4 It is a structural diagram of the specimen clamping part and the clamping fixing part;

[0023] Figure 5 Schematic diagram of the structure of the specimen clamp;

[0024] Figure 6 It is a structural diagram of the clamping fixture;

[0025] Figure 7 Schematic diagram of the structure of the push rod;

[0026] The symbols of the components are as follows:

[0027] 1. Test mold body; 11. Upper push rod groove; 111. Specimen sliding section; 112. Push rod guide sliding section; 113. Push rod guide; 12. Lower push rod hole; 13. Specimen support bar; 14. Fixed edge; 15. Fixed opening; 16. Rectangular opening; 17. Screw hole; 18. Stress relief hole; 2. Specimen clamping piece; 21. Vertical clamping groove; 22. Horizontal clamping groove; 3. Clamping fixture; 31. Clamping body; 32. Clamping protrusion; 33. Countersunk screw hole; 4. Push rod; 41. Push rod body; 42. Guide head; 43. Specimen push strip; 44. Mounting hole; 5. Specimen; 6. Specimen opening. DETAILED DESCRIPTION

[0028] The specific implementation methods of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation methods. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all utility model creations using the concept of the present invention are protected.

[0029] like Figure 1 、 2As shown in , 3, 4 and 5, the flow-type specimen fixture for the thermal shock loading test is used in conjunction with the specimen 5. The flow-type specimen fixture for the thermal shock loading test includes a test mold main body 1, a push rod 4 and two C-shaped specimen clamps 2. The two specimen clamps 2 are relatively arranged to form a columnar storage cavity for accommodating the specimen 5. The columnar storage cavity can be closed or can be a columnar storage cavity with an opening in the middle as in this embodiment. The columnar storage cavity here is mainly a columnar storage cavity for fixing the specimen 5. Whether it is a closed or open columnar storage cavity is not limited. The two specimen clamps 2 are fixed to the test mold main body 1 by a clamping fixture 3. The test mold body 1 is provided with a lower push rod hole 12 and an upper push rod groove 11 from bottom to top. The lower push rod hole 12 is connected to the upper push rod groove 11, and the top of the upper push rod groove 11 is connected to the outside. The lower push rod hole 12 and the upper push rod groove 11 are arranged along the length direction of the test mold body 1. The inner walls on both sides of the upper push rod groove 11 are provided with specimen support bars 13. The specimen support bars 13 and the test mold body 1 are integrally formed. The width of the columnar storage cavity is the same as the width of the upper push rod groove 11. The upper push rod groove 11 cooperates with the specimen support bars 13 to achieve bottom support and positioning of the specimen 5. At the same time, it is convenient to guide the specimen 5 that has undergone the thermal shock test out of the flow-type specimen tooling, so that the specimen can be conveniently sent to the next test link. The test mold body 1, the specimen clamp 2, the clamping fixture 3 and the push rod 4 are preferably made of graphite, which has good high temperature resistance.

[0030] like Figure 2 and 3 As shown, the upper push rod groove 11 includes a specimen sliding section 111 and a push rod guide sliding section 112 connected in sequence. The push rod guide sliding section 112 is arranged on the side close to the push rod 4. The width of the specimen sliding section 111 is greater than the width of the push rod guide sliding section 112. The width of the specimen sliding section 111 is greater than or equal to the width of the specimen 5. The open end of the push rod guide sliding section 112 is also provided with a push rod guide portion 113. The push rod guide portion 113 is in the shape of a guiding slope, which is convenient for guiding the push rod 4 into the upper push rod groove 11 and the lower push rod hole 12.

[0031] like Figure 4 、 5 As shown in FIG6 , the clamping side of the specimen clamping member 2 is provided with a vertical clamping groove 21 for placing the specimen 5 , and the fixed side of the specimen clamping member 2 is provided with a transverse clamping groove 22 .

[0032] like Figure 6As shown, the clamping fixture 3 includes a clamping body 31, which is provided with a clamping protrusion 32 that cooperates with the specimen clamping member 2. The clamping body 31 is provided with two countersunk screw holes 33. The test mold body 1 is provided with screw holes 17 that cooperate with the countersunk screw holes 33. The clamping fixture 3 is fixedly connected to the test mold body 1 by screws. The screws are also made of graphite to ensure that the flow-type specimen fixture can operate stably under high-temperature test conditions. The transverse clamping groove 22 on the specimen clamping member 2 is engaged with the clamping protrusion 32 on the clamping fixture 3, and the specimen clamping member 2 is firmly fixed to the test mold body 1 using the clamping fixture 3 and screws.

[0033] like Figure 7 As shown, the push rod 4 includes a push rod body 41 that cooperates with the lower push rod hole 12, a guide head 42 is provided on the front side of the push rod body 41, and the cross-section of the guide head 42 is an isosceles trapezoidal shape. The top of the push rod body 41 is provided with a specimen push strip 43 that cooperates with the upper push rod groove 11, and the specimen push strip 43 is a linear convex strip. The rear side of the push rod body 41 is provided with a mounting hole 44. The function of the specimen push strip 43 is to drive the specimen 5 at the bottom of the columnar storage cavity to slide out together, thereby sending the specimen that has passed the thermal shock test to the next test link. The isosceles trapezoidal guide head 42 cooperates with the push rod guide part 113 to facilitate the guiding operation of the push rod 4. The mounting hole 44 can connect the push rod 4 to telescopic equipment such as an electric telescopic rod and a hydraulic telescopic rod to achieve the telescopic movement of the push rod 4. The push rod body 41 slides in the lower push rod hole 12, and the specimen push bar 43 slides on the upper push rod groove 11. The push rod body 41 can drive the specimen 5 in the columnar storage cavity to be pushed out through the specimen push bar 43, thereby sending the specimen 5 located on the flow-type specimen tooling to the next test link, realizing the flow-type operation of the thermal shock test of the specimen 5, and greatly improving the thermal shock test efficiency of the specimen 5.

[0034] In this embodiment, the bottoms of the specimen clamping member 2 and the clamping fixture 3 are both provided with a specimen opening 6 that cooperates with the specimen 5. The specimen opening 6 has a clearance fit with the specimen 5. The width of the specimen opening 6 is the same as the width of the specimen sliding section 111, and the depth of the specimen opening 6 does not hinder the specimen 5 from sliding on the specimen sliding section 111.

[0035] In this embodiment, the test mold body 1 is provided with a rectangular opening 16 for mounting the specimen holder 2, and stress relief holes 18 are provided at the four corners of the rectangular opening 16. The rectangular opening 16 is used for inserting and mounting the specimen holder 2, which then forms a snap fit with the clamping protrusion 32 of the clamping fixture 3 via the transverse clamping groove 22, thereby securing the specimen holder 2 to the test mold body 1, ensuring the stability of the columnar storage chamber for storing the specimen 5 and ensuring the flow-through feeding operation of the columnar storage chamber for the specimen 5. The stress relief holes 18 provided at the four corners of the rectangular opening 16 can effectively eliminate the stress acting on the four corners of the rectangular opening 16 under high temperature conditions, thereby preventing the test mold body 1 from cracking due to stress.

[0036] In this embodiment, fixed edges 14 are provided on both sides of the test mold body 1. Each fixed edge 14 is provided with a plurality of semicircular fixed openings 15. The test mold body 1 and the fixed edges 14 are integrally designed. In this embodiment, each fixed edge 14 is preferably provided with three fixed openings 15, which are evenly distributed outside the fixed edge 14. By using the fixed edges 14 and fixed openings 15 on both sides of the test mold body 1, in conjunction with bolts, the test mold body 1 can be secured to a desired test platform or test chamber, facilitating the implementation of a continuous thermal shock test on the test specimen 5.

[0037] Working process and principle: The specimen 5 is sent to the top of the columnar storage cavity through the feeding device, so that the specimen 5 is fed into the columnar storage cavity in turn, and the specimen 5 is stacked in the columnar storage cavity. The test temperature of the thermal shock equipment is adjusted so that the flow-type specimen tooling and the specimen 5 are within the thermal shock temperature range to realize the thermal shock test of the specimen 5. Then, the specimen 5 located on the lowest side is pushed out along the open end of the specimen sliding section 111 by the push rod 4, so that the pushed out specimen 5 enters the next test link. The push rod 4 can push the material back and forth, and the columnar storage cavity formed by the two specimen clamps 2 can continuously convey the specimen 5 like a magazine, so that the flow-type specimen tooling cooperates with the thermal shock equipment to realize the flow-type thermal shock test of the specimen, greatly improving the efficiency of the thermal shock test. The thermal shock equipment referred to in this patent can be a high-temperature gas scouring thermal shock test device at a large span initial temperature in patent document CN117686368A, a large-span initial and target temperature instantaneous thermal shock loading test device in patent document CN117705628A, an aerospace vehicle thermal protection material assembly line thermal shock loading test device in patent document CN117705627A, an instantaneous thermal shock loading test device with adjustable oxygen partial pressure in patent document CN117723428A, etc.

Claims

1. A flow-type test piece fixture for thermal shock loading test, used in conjunction with a test piece (5), characterized in that: It comprises a test mold body (1), a push rod (4) and two C-shaped test piece clamping members (2), wherein the two test piece clamping members (2) are arranged relative to each other to form a columnar storage cavity for accommodating the test piece (5), and the two test piece clamping members (2) are fixed to the test mold body (1) by a clamping fixture (3); The test mold body (1) is provided with a lower push rod hole (12) and an upper push rod groove (11) in sequence from bottom to top, the lower push rod hole (12) is connected to the upper push rod groove (11), and the top of the upper push rod groove (11) is connected to the outside, the lower push rod hole (12) and the upper push rod groove (11) are arranged along the length direction of the test mold body (1), and the inner walls on both sides of the upper push rod groove (11) are provided with specimen support bars (13), and the width of the columnar storage cavity is the same as the width of the upper push rod groove (11).

2. The flow-type specimen fixture for thermal shock loading test according to claim 1, characterized in that: The clamping side of the specimen clamping piece (2) is provided with a vertical clamping groove (21) for placing the specimen (5), and the fixed side of the specimen clamping piece (2) is provided with a transverse clamping groove (22).

3. The flow-type test piece fixture for thermal shock loading test according to claim 1, characterized in that: The clamping fixture (3) comprises a clamping body (31), the clamping body (31) is provided with a clamping protrusion (32) that cooperates with the specimen clamping member (2), the clamping body (31) is provided with two countersunk screw holes (33), the test mold body (1) is provided with screw holes (17) that cooperate with the countersunk screw holes (33), and the clamping fixture (3) is fixedly connected to the test mold body (1) by screws.

4. The flow-type test piece fixture for thermal shock loading test according to claim 1, characterized in that: The bottoms of the specimen clamping piece (2) and the clamping fixing piece (3) are both provided with a specimen opening (6) that matches the specimen (5), and the specimen opening (6) and the specimen (5) are clearance-matched.

5. The flow-type test piece fixture for thermal shock loading test according to claim 1, characterized in that: The test mold body (1) is provided with a rectangular opening (16) for installing a test piece clamp (2), and stress release holes (18) are provided at the four corners of the rectangular opening (16).

6. The flow-type test piece fixture for thermal shock loading test according to claim 1, characterized in that: The upper push rod groove (11) includes a specimen sliding section (111) and a push rod guide sliding section (112) connected in sequence, the push rod guide sliding section (112) is arranged on a side close to the push rod (4), the width of the specimen sliding section (111) is greater than the width of the push rod guide sliding section (112), the width of the specimen sliding section (111) is greater than or equal to the width of the specimen (5), and the open end of the push rod guide sliding section (112) is also provided with a push rod guide portion (113).

7. The flow-type test piece fixture for thermal shock loading test according to claim 1, characterized in that: Both sides of the test mold body (1) are provided with fixed edges (14), the test mold body (1) and the fixed edges (14) are designed as one piece, and each of the fixed edges (14) is provided with a plurality of fixed openings (15), and the fixed openings (15) are semicircular.

8. The flow-type test piece fixture for thermal shock loading test according to claim 1, characterized in that: The push rod (4) includes a push rod body (41) that cooperates with the lower push rod hole (12), a guide head (42) is provided on the front side of the push rod body (41), and the cross section of the guide head (42) is an isosceles trapezoidal shape. The top of the push rod body (41) is provided with a specimen push strip (43) that cooperates with the upper push rod groove (11), and the specimen push strip (43) is a linear convex strip. The rear side of the push rod body (41) is provided with a mounting hole (44).

9. The flow-type test piece fixture for thermal shock loading test according to claim 1, characterized in that: The test mold body (1), the test piece clamping piece (2), the clamping fixing piece (3) and the push rod (4) are all made of graphite.

10. The flow-type test piece fixture for thermal shock loading test according to claim 1, characterized in that: The specimen support bar (13) is integrally formed with the test mold body (1).

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