CN219915218U

CN219915218U - Bending sample centering device

Info

Publication number: CN219915218U
Application number: CN202320707330.9U
Authority: CN
Inventors: 朱晓琪; 周建
Original assignee: Jiangsu Maohua Inspection And Testing Co ltd
Current assignee: Jiangsu Maohua Inspection And Testing Co ltd
Priority date: 2023-04-03
Filing date: 2023-04-03
Publication date: 2023-10-27
Anticipated expiration: 2033-04-03

Abstract

The utility model discloses a bent sample centering device, which relates to the technical field of bending test equipment and comprises a clamping frame, a supporting plate, an inserting block, a flexible sleeve, a spring, a centering frame, an inserting strip and an ejector rod. In the utility model, the centering frame at the top end of the centering mechanism is firstly contacted with the bottom of the sample, the centering frame is inserted into a notch at the bottom of the sample, the outer wall of the flexible sleeve is clung to the inner wall of the notch at the bottom of the sample, the top end of the centering frame is clung to the top end of the notch at the bottom of the sample, and the insert block is inserted into the bottom end of the notch at the bottom of the sample; when the centering frame and the flexible sleeve of the centering mechanism are gradually clung to the inner wall of the notch at the bottom of the sample, the position of the sample is shifted until the notch at the bottom of the sample and the centering mechanism are completely centered and then no shift occurs; the centering treatment of the sample can be realized without using infrared emission equipment, the equipment cost is low, the automatic centering is realized by means of a mechanical structure in the centering process, manual adjustment is not needed, repeated operation is not needed, and the operation is convenient and quick.

Description

Bending sample centering device

Technical Field

The utility model relates to the technical field of bending test equipment, in particular to a bending sample centering device.

Background

In British Standard BS7448-1:1991, it is required that the angle between the pre-fabricated fatigue crack course of the test specimen and the plane of the specimen gap is less than 10 DEG, otherwise the test results are not valid. The line of the prefabricated fatigue crack is very close to the centering step relation of the three-point bending sample, if the top line of the pressure head is not aligned with the top line of the machining notch, the test pressure cannot be completely loaded on the top line of the notch of the sample, and deviation can occur, so that the prefabricated crack is easy to walk and deviate, and the test result is wrong; therefore, the centering device is required to perform centering treatment on the sample.

The utility model discloses a test centering device to three-point bending sample in patent (CN 207832532U), including base (3), pressure head (7) are located the top of base (3), be provided with on base (3) sample supporting mechanism pressure head and mark line (10), be provided with infrared centering mechanism on base (3), infrared centering mechanism includes infrared emitter, connecting rod and transmitter support, infrared emitter passes through the connecting rod to be fixed on the transmitter support, the transmitter support can be fixed with base (3), and fixed position is adjustable, infrared emitter transmits vertical infrared be used for verifying that mark line (10) of pressure head aligns in vertical direction with the breach summit of sample (6). When the prefabricated fatigue crack is carried out, the infrared emitters on the two sides are started to generate thinner vertical infrared marking lines, the position of the sample is manually and finely adjusted, the marking line of the top line of the upper pressing head is easily aligned with the top point of the notch, and the accurate positioning is realized.

In the above patent documents, the infrared emission device is used for centering and marking the sample, the equipment cost is high, meanwhile, the position of the sample needs to be manually adjusted, the manual adjustment precision is poor, repeated operation is needed, and the operation is complicated.

Disclosure of Invention

The present utility model is directed to a curved sample centering device, which solves the above-mentioned problems of the prior art.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a crooked sample centering device, includes the frame, frame top bilateral symmetry is equipped with the holder, the frame top is equipped with a plurality of first servo electricity jar between two holders, first servo electricity jar top is equipped with same backup pad, backup pad top center is equipped with centering mechanism, centering mechanism includes fixed column, inserted block, support frame, flexible cover, spring and centering frame, inserted block and sample breach assorted, the support frame is located between spring and the inserted block, flexible cover is located between spring and the centering frame, centering frame bottom is equipped with a plurality of cutting, a plurality of slot has been seted up at flexible cover top, the spring top is equipped with the ejector pin in the cutting below, flexible cover bottom seted up with ejector pin assorted first logical groove.

Further, the frame is vertically provided with a second servo electric cylinder above the fixed column, the bottom output end of the second servo electric cylinder is provided with a pressure head, the second servo electric cylinder drives the pressure head to perform lifting movement, and the pressure head performs compression bending test on the sample.

Further, two adjacent one side of holder bottom level is equipped with the layer board, the holder is equipped with swing joint's clamp plate in the layer board top, the clamp plate bottom is equipped with the bracing piece, the bracing piece bottom runs through the holder and with backup pad top fixed connection.

Further, the clamping frame inner wall is provided with a movable groove matched with the pressing plate, and the clamping frame inner wall is provided with a second through groove matched with the supporting rod below the movable groove.

Further, the width of the top of the centering frame is smaller than that of the inserting block, the width of the flexible sleeve is smaller than that of the inserting block, and the width of the supporting frame is smaller than that of the inserting block, so that the centering frame, the flexible sleeve and the supporting frame can be directly inserted into the inner side of a notch of a sample.

Further, the guide rod is arranged at the center of the bottom of the centering frame, the first guide groove matched with the guide rod is formed in the top of the flexible sleeve, the second guide groove matched with the guide rod is formed in the top of the supporting frame, the guide rod is used for guiding the centering frame, and the guide rod penetrates through the first guide groove and the second guide groove, so that the stability of the centering frame can be effectively guaranteed.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the clamping frame, the supporting plate, the inserting block, the flexible sleeve, the spring, the centering frame, the inserting strip and the ejector rod are arranged, the centering frame at the top end of the centering mechanism is firstly contacted with the bottom of the sample, the centering frame is inserted into a notch at the bottom of the sample, the inserting strip fills and expands the slot of the flexible sleeve, so that the width of the flexible sleeve is expanded, the outer wall of the flexible sleeve is tightly attached to the inner wall of the notch at the bottom of the sample, the top end of the centering frame is tightly attached to the top end of the notch at the bottom of the sample, and the inserting strip is inserted into the bottom end of the notch at the bottom of the sample; when the centering frame and the flexible sleeve of the centering mechanism are gradually clung to the inner wall of the notch at the bottom of the sample, the position of the sample is shifted until the notch at the bottom of the sample and the centering mechanism are completely centered and then no shift occurs; the centering treatment of the sample can be realized without using infrared emission equipment, the equipment cost is low, the automatic centering is realized by means of a mechanical structure in the centering process, manual adjustment is not needed, repeated operation is not needed, and the operation is convenient and quick.

2. According to the utility model, the supporting plate, the pressing plate, the supporting rod and the movable groove are arranged, the pressing plate moves up and down along with the supporting plate through the supporting rod, so that the sample is in a free unfixed state in the process of jacking and centering, the sample can be subjected to self-adaptive fine adjustment, and after centering, the pressing plate moves down along with the downward movement of the centering mechanism to compress the sample, so that the sample is prevented from being displaced again after centering.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a front view of the whole of the present utility model;

FIG. 2 is a front cross-sectional view of the entirety of the present utility model;

FIG. 3 is an enlarged schematic view of the utility model at A in FIG. 2;

FIG. 4 is a front view of the centering mechanism of the present utility model in an extended state;

in the figure: 1. a frame; 2. a clamping frame; 3. a first servo cylinder; 4. a support plate; 5. fixing the column; 6. a sample; 7. inserting blocks; 8. a support frame; 9. a flexible sleeve; 10. a spring; 11. centering frame; 12. cutting; 13. a slot; 14. a push rod; 15. a first through groove; 16. a second servo cylinder; 17. a pressure head; 18. a supporting plate; 19. a pressing plate; 20. a support rod; 21. a movable groove; 22. a guide rod.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides the following technical solutions: the utility model provides a crooked sample centering device, includes frame 1, frame 1 top bilateral symmetry is equipped with clamping frame 2, frame 1 top is equipped with a plurality of first servo electric jar 3 between two clamping frames 2, first servo electric jar 3 top is equipped with same backup pad 4, backup pad 4 top center is equipped with centering mechanism, centering mechanism includes fixed column 5, inserted block 7, support frame 8, flexible cover 9, spring 10 and centering frame 11, inserted block 7 and sample 6 breach phase-match, support frame 8 locates between spring 10 and the inserted block 7, flexible cover 9 locates between spring 10 and the centering frame 11, centering frame 11 bottom is equipped with a plurality of cutting 12, a plurality of slot 13 has been seted up at flexible cover 9 top, spring 10 top is equipped with ejector pin 14 in cutting 12 below, flexible cover 9 bottom has seted up the first logical groove 15 with ejector pin 14 phase-match; a supporting plate 18 is horizontally arranged on one side adjacent to the bottom of the two clamping frames 2, a pressing plate 19 which is movably connected is arranged above the supporting plate 18, a supporting rod 20 is arranged at the bottom of the pressing plate 19, and the bottom of the supporting rod 20 penetrates through the clamping frames 2 and is fixedly connected with the top of the supporting plate 4; the frame 1 is vertically provided with a second servo electric cylinder 16 above the fixed column 5, and a pressure head 17 is arranged at the bottom output end of the second servo electric cylinder 16.

The inner wall of the clamping frame 2 is provided with a movable groove 21 matched with the pressing plate 19, and a second through groove matched with the supporting rod 20 is arranged below the movable groove 21 on the inner wall of the clamping frame 2; the width of the top of the centering frame 11 is smaller than the width of the inserting block 7, the width of the flexible sleeve 9 is smaller than the width of the inserting block 7, and the width of the supporting frame 8 is smaller than the width of the inserting block 7; the center of the bottom of the centering frame 11 is provided with a guide rod 22, the top of the flexible sleeve 9 is provided with a first guide groove matched with the guide rod 22, and the top of the supporting frame 8 is provided with a second guide groove matched with the guide rod 22.

The working principle of the utility model is as follows:

referring to fig. 1-4 of the specification, the utility model is characterized in that a clamping frame 2, a supporting plate 4, an inserting block 7, a flexible sleeve 9, a spring 10, a centering frame 11, an inserting strip 12 and an ejector rod 14 are arranged, a sample 6 is placed at a position approximately in the middle between the two clamping frames 2, a supporting plate 18 supports the bottom of the sample 6, a pressing plate 19 is used for pressing the sample 6, after the sample 6 is placed between the two clamping frames 2, a first servo cylinder 3 is regulated to extend, the supporting plate 4 is pushed upwards by the first servo cylinder 3, a centering mechanism and a supporting rod 20 are pushed upwards by the supporting plate 4, the pressing plate 19 is driven to move upwards by the supporting rod 20, the sample 6 is not pressed by the pressing plate 19, the centering mechanism moves upwards along with the supporting plate 4, and gradually moves upwards along with the centering mechanism, the centering frame 11 at the top end of the centering mechanism is firstly contacted with the bottom of the sample 6, the centering frame 11 is inserted into a notch at the bottom of the sample 6, the centering frame 11, the flexible sleeve 9, the spring 10 and the supporting frame 8 all enter the notch at the bottom of the sample 6 along with the continuous upward movement of the centering mechanism, the top end of the centering frame 11 is inserted into the deepest part of the notch at the bottom of the sample 6, the cutting 12 at the bottom of the centering frame 11 is inserted into the slot 13 of the flexible sleeve 9 along with the continuous upward movement of the supporting plate 4, the cutting 12 fills and expands the slot 13 of the flexible sleeve 9, the width of the flexible sleeve 9 is further expanded, the outer wall of the flexible sleeve 9 is tightly attached to the inner wall of the notch at the bottom of the sample 6, the top end of the centering frame 11 is tightly attached to the top end of the notch at the bottom of the sample 6, and the inserting block 7 is inserted into the bottom end of the notch at the bottom of the sample 6; during the process of inserting the centering mechanism into the notch at the bottom of the sample 6, the sample 6 is in a free movement unfixed state, and because the centering mechanism is positioned at the top center of the supporting plate 4, when the centering frame 11 and the flexible sleeve 9 of the centering mechanism are gradually clung to the inner wall of the notch at the bottom of the sample 6, the position of the sample 6 is shifted until the notch at the bottom of the sample 6 and the centering mechanism are completely centered and then no more displacement occurs; before the cutting 12 is inserted into the slot 13, the ejector rod 14 passes through the first through slot 15 under the action of the elasticity of the spring 10 and is inserted into the slot 13, when the cutting 12 is gradually inserted into the slot 13, the cutting 12 gradually pushes the ejector rod 14 downwards, the ejector rod 14 compresses the spring 10, the support frame 8 supports the spring 10, the support frame 8 is supported by the insertion block 7, and the insertion block 7 is supported by the fixing column 5 below the sample 6; when the centering mechanism is completely inserted into the inner side of a notch of a sample 6, the first servo electric cylinder 3 is regulated to shrink, the supporting plate 4 is driven to move downwards, the centering mechanism is driven to move downwards, the fixed column 5 drives the inserting block 7 to move downwards, the inserting block 7 drives the supporting frame 8 to move downwards, the spring 10 loses the upward pushing force from the lower part to rebound, the rebound of the spring 10 drives the ejector rod 14 to push upwards, the ejector rod 14 passes through the first through groove 15 to enter the slot 13 to push the cutting 12 upwards, in the rebound process of the spring 10, the centering frame 11 always contacts with the top end of the notch at the bottom of the sample 6, the ejector rod 14 ejects the cutting 12 from the slot 13, the inner space of the slot 13 is reduced, the width of the flexible sleeve 9 is reduced, the flexible sleeve 9 is not contacted with the inner wall of the notch at the bottom of the sample 6 any more, the centering mechanism continues to move downwards, the supporting frame 8, the spring 10, the flexible sleeve 9 and the centering frame 11 are gradually separated from the notch at the bottom of the sample 6, the centering operation of the sample 6 is completed, in the downward moving process of the supporting plate 4, the pressing plate 19 is driven to move downwards through the supporting plate 20, the pressing plates 19 and 18 are matched to clamp the centering processed sample 12, and then the second servo electric pressure head 16 is regulated to bend the sample 6 downwards, and the test sample is subjected to bending by the downward pressure of the pressing plate 17; according to the utility model, centering treatment of the sample 6 can be realized without using infrared emission equipment, the equipment cost is low, automatic centering is realized by means of a mechanical structure in the centering process, manual adjustment is not required, repeated operation is not required, and the operation is convenient and quick.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A curved sample centering device comprising a frame (1), characterized in that: clamping frames (2) are symmetrically arranged on two sides of the top of the frame (1), a plurality of first servo electric cylinders (3) are arranged between the two clamping frames (2) on the top of the frame (1), the same supporting plate (4) is arranged on the top of each first servo electric cylinder (3), a centering mechanism is arranged at the center of the top of each supporting plate (4), each centering mechanism comprises a fixing column (5), an inserting block (7), a supporting frame (8), a flexible sleeve (9), a spring (10) and a centering frame (11), the inserting blocks (7) are matched with notches of a sample (6), the support frame (8) is arranged between the spring (10) and the inserting block (7), the flexible sleeve (9) is arranged between the spring (10) and the centering frame (11), a plurality of inserting strips (12) are arranged at the bottom of the centering frame (11), a plurality of inserting slots (13) are formed in the top of the flexible sleeve (9), an ejector rod (14) is arranged below the inserting strips (12) at the top of the spring (10), and a first through groove (15) matched with the ejector rod (14) is formed in the bottom of the flexible sleeve (9).

2. A curved sample centering device as claimed in claim 1, wherein: the machine frame (1) is vertically provided with a second servo electric cylinder (16) above the fixed column (5), and the output end at the bottom of the second servo electric cylinder (16) is provided with a pressure head (17).

3. A curved sample centering device as claimed in claim 1, wherein: two adjacent one side of holder (2) bottom level is equipped with layer board (18), holder (2) are equipped with swing joint's clamp plate (19) in layer board (18) top, clamp plate (19) bottom is equipped with bracing piece (20), bracing piece (20) bottom runs through holder (2) and with backup pad (4) top fixed connection.

4. A curved sample centering device as claimed in claim 3, wherein: the clamping frame (2) inner wall is provided with a movable groove (21) matched with the pressing plate (19), and the clamping frame (2) inner wall is provided with a second through groove matched with the supporting rod (20) below the movable groove (21).

5. A curved sample centering device as claimed in claim 1, wherein: the width of the top of the centering frame (11) is smaller than the width of the inserting block (7), the width of the flexible sleeve (9) is smaller than the width of the inserting block (7), and the width of the supporting frame (8) is smaller than the width of the inserting block (7).

6. A curved sample centering device as claimed in claim 1, wherein: the center of the bottom of the centering frame (11) is provided with a guide rod (22), the top of the flexible sleeve (9) is provided with a first guide groove matched with the guide rod (22), and the top of the supporting frame (8) is provided with a second guide groove matched with the guide rod (22).