CN223154730U

CN223154730U - Bending test device

Info

Publication number: CN223154730U
Application number: CN202421457681.XU
Authority: CN
Inventors: 尚进; 曹桂松; 雷小娇
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2024-06-24
Filing date: 2024-06-24
Publication date: 2025-07-25
Anticipated expiration: 2034-06-24

Abstract

The present application discloses a bending test device. The bending test device includes a bending test fixture and a distance adjustment device. The bending test fixture includes a fixture seat, two support parts and a loading head. The support part is used to support the bending test piece during the bending test. The distance adjustment device includes a base, two position adjustment parts and a distance adjustment assembly. The position adjustment part is slidably arranged on the base. The position adjustment part is used to engage with the support part and drive the support part to move. The distance adjustment assembly includes a worm, a worm wheel and an adjustment gear. The first end of the worm is meshed with the worm wheel. The second end of the worm is used to receive external force. The worm wheel is fixedly connected to the adjustment gear. The adjustment gear is transmission-connected to the two position adjustment parts. The worm wheel drives the adjustment gear to rotate synchronously so that the two position adjustment parts move in opposite directions at the same speed. Based on the self-locking effect of the worm wheel and the worm, the position stability of the position adjustment part after the span is adjusted is improved, and the accuracy of the result of the bending test is improved.

Description

Bending test device

Technical Field

The application relates to the technical field of material performance test, in particular to a bending test device

Background

The material bending test is a test for measuring mechanical properties of a material when the material is subjected to bending load, and is one of basic methods for testing mechanical properties of the material. The bending test is mainly used for measuring the bending strength of brittle and low-plasticity materials (such as composite materials and the like) and can reflect the deflection of the plasticity index.

The existing centering modes mainly comprise a mode of measuring the left and right lengths of the loading head by adopting a caliper, and a mode of centering the middle plate by adopting a fixed span.

The centering mode of measuring the left and right lengths of the loading head by using the caliper is low in efficiency and is difficult to accurately measure in addition, and the centering accuracy of the test fixture is affected. The fixed span centering plate is adopted, and the centering device has the advantages of quick centering, simplicity and easiness in operation, however, when the material bending test clamp is centered, the mode of rotating and adjusting the gear and the rack is adopted, the locking cannot be realized after the adjustment, and the phenomenon of collision and sliding during installation is caused, so that the problem of inaccurate centering is caused.

It should be noted that the statements in this background section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Disclosure of utility model

The application provides a bending test device which is used for improving the accuracy of test results.

The application provides a bending test device which comprises a bending test clamp and a distance adjusting device. The bending test fixture comprises a fixture seat, two supporting parts and a loading head. Both the two supporting parts and the loading head are arranged on the clamp seat. The positions of the two supporting parts relative to the clamp seat are adjustable. The two supporting parts are used for supporting the bending test piece during the bending test. The loading head is used for exerting pressure on the bending test piece to carry out bending test. The distance adjusting device comprises a base, two position adjusting pieces and a distance adjusting assembly. The two positioning pieces are arranged on the base in a sliding way. The two positioning pieces are respectively used for being clamped with the two supporting parts and driving the two supporting parts to move so as to adjust the spans of the two supporting parts. The distance adjusting assembly comprises a worm, a worm wheel and an adjusting gear. The first end of the worm engages the worm gear. The second end of the worm is used for receiving external force so that the worm rotates along the axis of the worm under the action of the external force to drive the worm wheel to rotate. The worm wheel is fixedly connected with the adjusting gear. The adjusting gear is in transmission connection with the two position adjusting pieces. When the worm wheel rotates, the adjusting gear is driven to synchronously rotate so that the two position adjusting pieces simultaneously move in opposite directions at the same speed.

In some embodiments, the worm and worm gear are both disposed inside the base, and the second end of the worm extends outside the base.

In some embodiments, the worm extends in a width direction of the base. The two positioning pieces can slide along the length direction of the base.

In some embodiments, the distance adjustment assembly further comprises two racks. Both racks are engaged with the adjusting gear. The two racks are slidably arranged on the base. When the adjusting gear rotates, the two racks simultaneously move in opposite directions relative to the base at the same speed. The two position adjusting parts are respectively connected with the two racks, and the two racks are driven to synchronously move when moving.

In some embodiments, the bend test apparatus further comprises two parallel runners disposed on the base. The two racks are respectively connected with the two sliding grooves in a sliding way.

In some embodiments, the positioning member is disposed at an end of the rack, and the positioning member is slidably coupled to the chute.

In some embodiments, the bend test apparatus further comprises a carriage. One end of the sliding frame is slidably arranged in the sliding groove, and the other end of the sliding frame extends out of the sliding groove and is detachably connected with the position adjusting piece.

In some embodiments, the adjustment gear is disposed in a middle portion of the base. The two positioning pieces are respectively arranged at the outer ends of the two racks. At maximum spacing of the two positioning members, the outer end of the rack is farther from the adjustment gear than the inner end. In the process that the two positioning pieces are close to each other, the outer end of the rack is gradually close to the adjusting gear, and the inner end of the rack is gradually far away from the adjusting gear.

In some embodiments, the loading head is located between and above the two supports. The bending test device further comprises a positioning member. The locating piece is arranged on the base, and the locating piece are respectively located on different sides of the base. The positioning piece is used for being clamped with the loading head in the process that the two positioning pieces are respectively clamped with the two supporting parts to adjust the spans of the two supporting parts.

In some embodiments, the positioning member is removably coupled to the base.

Based on the technical scheme provided by the application, the bending test device comprises a bending test clamp and a distance adjusting device. The bending test fixture comprises a fixture seat, two supporting parts and a loading head. Both the two supporting parts and the loading head are arranged on the clamp seat. The positions of the two supporting parts relative to the clamp seat are adjustable. The two supporting parts are used for supporting the bending test piece during the bending test. The loading head is used for exerting pressure on the bending test piece to carry out bending test. The distance adjusting device comprises a base, two position adjusting pieces and a distance adjusting assembly. The two positioning pieces are arranged on the base in a sliding way. The two positioning pieces are respectively used for being clamped with the two supporting parts and driving the two supporting parts to move so as to adjust the spans of the two supporting parts. The distance adjusting assembly comprises a worm, a worm wheel and an adjusting gear. The first end of the worm engages the worm gear. The second end of the worm is used for receiving external force so that the worm rotates along the axis of the worm under the action of the external force to drive the worm wheel to rotate. The worm wheel is fixedly connected with the adjusting gear. The adjusting gear is in transmission connection with the two position adjusting pieces. When the worm wheel rotates, the adjusting gear is driven to synchronously rotate so that the two position adjusting pieces simultaneously move in opposite directions at the same speed. The distance adjusting device can be used for rapidly adjusting the span of the two supporting parts, guaranteeing that the displacement of the two supporting parts is equal, realizing equidistant adjustment and guaranteeing the accuracy of a bending test. And based on the self-locking effect of the worm wheel and the worm, the position stability of the position adjusting parts after the span is adjusted is improved, the risk that the two position adjusting parts accidentally shake to drive the supporting part to generate unexpected displacement is reduced, and the accuracy of the result of the bending test is improved.

Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the application, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

FIG. 1 is a schematic view of a bending test apparatus according to some embodiments of the present application.

Fig. 2 is a bottom view of the distance adjusting device of fig. 1.

Fig. 3 is a front view in partial cross section of the distance adjusting device of fig. 1.

Fig. 4 is a side view in partial cross-section of the distance adjustment device of fig. 1.

Detailed Description

The following description of the embodiments of the present application 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 application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways and the spatially relative descriptions used herein are construed accordingly.

Referring to FIG. 1, some embodiments of the present application provide a bend test apparatus including a bend test fixture and a distance adjustment device. The bending test fixture comprises a fixture seat 7, two support parts 9 and a loading head 10. Both the support 9 and the loading head 10 are arranged on the holder. The position of the two support parts 9 relative to the holder base 7 is adjustable. The two support parts 9 are used for supporting the bending test piece during the bending test. The loading head 10 is used to apply pressure to a bending test piece to perform a bending test. The distance adjusting device comprises a base 1, two position adjusting pieces 2 and a distance adjusting assembly 3. Two positioning members 2 are slidably provided on the base 1. The two positioning pieces 2 are respectively used for being clamped with the two supporting parts 9 and driving the two supporting parts 9 to move so as to adjust the spans of the two supporting parts 9. The distance adjustment assembly 3 comprises a worm 31, a worm wheel 32 and an adjustment gear 33. The first end of the worm 31 is engaged with the worm wheel 32. The second end of the worm 31 is used for receiving an external force, so that the worm 31 rotates along the axis thereof under the action of the external force to drive the worm wheel 32 to rotate. The worm wheel 32 is fixedly connected with the adjusting gear 33. The adjusting gear 33 is in driving connection with the two adjusting members 2. The worm wheel 32 rotates to drive the adjusting gear 33 to rotate synchronously so that the two positioning members 2 move in opposite directions at the same time at the same speed.

Specifically, the bending test device provided by the embodiment of the application is suitable for a three-point bending test, the loading head 10 is positioned between the two supporting parts 9, and the two supporting parts 9 are symmetrical with respect to the loading head 10. Depending on the requirements of the bending test for the span, it is necessary to increase or decrease the spacing of the support 9 from the loading head 10. The distance adjusting device can be used for rapidly adjusting the span of the two supporting parts 9, guaranteeing that the displacement of the two supporting parts 9 is equal, realizing equidistant adjustment and guaranteeing the accuracy of a bending test. And based on the self-locking effect of the worm wheel 32 and the worm 31, the position stability of the position adjusting parts 2 after the span is adjusted is improved, the risk that the two position adjusting parts 2 drive the supporting parts 9 to generate unexpected displacement due to unexpected shaking is reduced, and the accuracy of the bending test result is improved.

To simplify the construction of the pitch device, referring to fig. 3, in some embodiments, both the worm 31 and the worm wheel 32 are disposed inside the base 1, and the second end of the worm 31 extends outside the base 1. This reduces the structural interference of the worm 31 and the worm wheel 32 with the positioning member 2, and allows room for the arrangement of the adjustment gear 33.

In some embodiments, a knob is provided at the second end of the worm 31 to facilitate the application of force by the test person to rotate the worm 31.

In some embodiments, the worm 31 extends in the width direction of the base 1. The two positioning members 2 are slidable along the length direction of the base 1.

Specifically, the base 1 is a rectangular plate-shaped member, the worm 31 is rotatably disposed in the base 1, the worm wheel 32 is disposed in the base 1 and is located at the center of the base 1, the worm 31 is engaged with the worm wheel 32 from the side of the worm wheel 32, the rotation surface of the worm 31 is perpendicular to the width direction of the base 1, and the rotation surface of the worm wheel 32 is perpendicular to the thickness direction of the base 1. The adjustment gear 33 is rotatably provided at the bottom surface of the base 1, and the worm wheel 32 is coaxially provided with the adjustment gear 33 such that the rotation surface of the adjustment gear 33 is parallel to the rotation surface of the worm wheel 32.

Referring to fig. 2, in some embodiments, the distance adjustment assembly 3 further includes two racks 34. Both racks 34 are engaged with the adjusting gear 33. Two racks 34 are slidably provided on the base 1. When the adjusting gear 33 rotates, the two racks 34 move in opposite directions relative to the base 1 at the same time at the same speed. The two positioning elements 2 are each connected to two racks 34. The two racks 34 move to drive the two positioning members 2 to move synchronously.

Specifically, the extending direction of the racks 34 coincides with the length direction of the base 1, and the two racks 34 are symmetrically disposed on both sides of the adjusting gear 33 in the width direction of the base 1, so that when the adjusting gear 33 rotates, the displacement amounts of the two racks 34 are equivalent, thereby improving the rapidity and accuracy of span adjustment.

In some embodiments, the bending test device further comprises two mutually parallel slide grooves 4 provided on the base 1. The two racks 34 are respectively slidably connected with the two slide grooves 4.

The chute 4 is provided on the bottom surface of the base 1, and the rack 34 is slidably connected to the chute 4 through a slider, thereby improving the smoothness of movement of the rack 34 relative to the base 1. In some embodiments, the positioning member 2 is disposed at an end of the rack 34, and the positioning member 2 is slidably coupled to the chute 4.

Specifically, the surface of the positioning member 2 facing the adjusting gear 33 is connected with the end face of the end portion of the rack 34, and compared with the scheme of connecting the positioning member 2 at other positions of the rack 34, the adjusting range of the distance between the two positioning members 2 can be increased, and the span of the two supporting portions 9 can be adjusted in a large range, so that the feasibility of the bending test device is improved, and the diversified test requirements are satisfied.

In some embodiments, the positioning member 2 is provided with a groove, and the supporting portion 9 is provided with a protrusion, and the groove is adapted to the shape of the protrusion, so that the positioning member 2 is engaged with the supporting portion 9. In some embodiments, the grooves are triangular grooves and the protrusions are triangular protrusions.

Referring to fig. 4, in some embodiments, the bending test apparatus further comprises a carriage 5. One end of the carriage 5 is slidably disposed within the chute 4. The other end of the sliding frame 5 extends out of the sliding groove 4 and is detachably connected with the position adjusting piece 2.

In particular, fig. 4 shows a cut-away illustration of the connection of the slide frame 5 of the positioning element 2, the dimensions of the opening section of the slide groove 4 being smaller than those of the bottom section, the slide frame 5 being configured as a T-shaped structure, so that the slide frame 5 fits in contour with the slide groove 4 and the stability of the slide frame 5 in the slide groove 4 can be improved. The part of the sliding frame 5 extending out of the sliding groove 4 is inserted into the position adjusting piece 2, and the sliding frame 5 is connected with the position adjusting piece 2 in a clamping mode or in a threaded mode, so that the sliding frame is detachable, the position adjusting piece 2 is convenient to replace, and convenience is improved.

In other embodiments, one end of the carriage 5 is slidably disposed within the chute 4. The other end of the sliding frame 5 extends out of the sliding groove 4 and is connected with one end of the connecting plugboard A, and the other end of the connecting plugboard A is in threaded connection with the position adjusting piece 2.

In some embodiments, the adjustment gear 33 is disposed in the middle of the base 1. The two positioning members 2 are respectively provided at the outer ends of the two racks 34. At the maximum distance between the two positioning elements 2, the outer end of the toothed rack 34 is farther from the adjusting gear 33 than the inner end. During the process of approaching the two positioning members 2 to each other, the outer end of the rack 34 gradually approaches the adjusting gear 33, and the inner end of the rack 34 gradually gets away from the adjusting gear 33.

Specifically, as shown in fig. 2, at this time, the distance between the two positioning members 2 is maximized, and if the adjusting gear 33 is continued to rotate clockwise, the outer end of the rack 34 is continued to be away from the adjusting gear 33, thereby causing the inner end of the rack 34 to be disengaged from the adjusting gear 33. When the adjusting gear 33 is rotated counterclockwise, the outer end of the rack 34 is moved in a direction approaching the adjusting gear 33, and the two positioning members 2 gradually approach each other.

Referring to fig. 1, in some embodiments, the loading head 10 is located between the two support portions 9 and higher than the two support portions 9. The bending test device further comprises a positioning member 6. The positioning piece 6 is arranged on the base 1, and the positioning piece 6 and the positioning piece 2 are respectively positioned on different sides of the base 1. The positioning member 6 is used for being engaged with the loading head 10 in the process of respectively engaging the two supporting portions 9 by the two positioning members 2 to adjust the spans of the two supporting portions 9.

Specifically, when the span is adjusted after the two positioning members 2 and the two supporting portions 9 are clamped, because the loading head 10 and the clamp seat 7 are relatively fixed, the positioning member 6 for clamping the loading head 10 is additionally arranged, so that when the worm 31 is screwed, the support portions 9 can be driven by the positioning members 2 to move relative to the clamp seat 7, the base 1 and the clamp seat 7 do not move relatively, the accuracy of span adjustment is improved, and the accuracy of test results is improved.

In some embodiments, the positioning member 6 is detachably connected with the base 1. Specifically, fig. 4 shows a schematic drawing of a section of a detachable connection portion of the positioning member 6 with the base 1, wherein a connection plugboard a is arranged on the top surface of the base 1, one end of the connection plugboard a is fixedly connected with the base 1, the other end of the connection plugboard a is inserted into the positioning member 6, and the connection plugboard a is in clamping connection or threaded connection with the positioning member 6, so that the positioning member 6 can be detached, the positioning member 6 can be replaced conveniently, and the convenience is improved.

In some embodiments, the loading head 10 has a triangular profile, and the positioning member 6 is provided with a triangular groove matching the profile of the loading head 10, so as to improve stability after clamping.

Referring to fig. 1, in some embodiments, the bend test clamp includes a clamp chute 8 provided on a clamp mount 7. The supporting portion 9 is slidably connected with the clamp chute 8 through a slider, so that the supporting portion 9 is slidable relative to the clamp seat 7.

In some embodiments, graduation marks are provided on the clamp base 7, so that a test person can know the spans of the two supporting parts 9.

The use flow of the bending test fixture provided by the application is briefly described below, namely, the bending test fixture and the distance adjusting device are assembled, so that the positioning piece 6 is clamped with the loading head 10, the two positioning pieces 2 are clamped with the two supporting parts 9, and then the second ends of the worms 31 are screwed according to test requirements to adjust the distance between the two supporting parts 9 so as to meet the span required by a test. After the span is adjusted, the distance adjusting device is taken down, the test piece is placed on the bending test fixture, the two supporting parts 9 are abutted against and support the test piece from the lower side of the test piece, then the test machine is started, and the loading head 10 is abutted against and applies acting force to the test piece from the upper side of the test piece.

It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application may be modified or some technical features may be equivalently replaced, and they are all included in the scope of the technical solution of the present application as claimed.

Claims

1. A bending test apparatus, comprising:

The bending test clamp comprises a clamp seat (7), two supporting parts (9) and a loading head (10), wherein the two supporting parts (9) and the loading head (10) are arranged on the clamp seat, the positions of the two supporting parts (9) relative to the clamp seat (7) are adjustable, the two supporting parts (9) are used for supporting a bending test piece in the bending test process, the loading head (10) is used for applying pressure to the bending test piece to carry out bending test, and

A distance adjusting device, which comprises

A base (1);

Two positioning pieces (2) are arranged on the base (1) in a sliding manner, the two positioning pieces (2) are respectively used for being clamped with the two supporting parts (9) and driving the two supporting parts (9) to move so as to adjust the span of the two supporting parts (9), and

Distance adjusting component (3), including worm (31), worm wheel (32) and adjusting gear (33), the first end of worm (31) with worm wheel (32) meshing, the second end of worm (31) is used for receiving external force, so that worm (31) rotate along self axis under the effect of external force and drive worm wheel (32) rotate, worm wheel (32) with adjusting gear (33) fixed connection, adjusting gear (33) with two positioning piece (2) transmission are connected, worm wheel (32) drive when rotating adjusting gear (33) synchronous rotation so that two positioning piece (2) simultaneously move with the same speed along opposite direction.

2. The bending test device according to claim 1, wherein the worm (31) and the worm wheel (32) are both arranged inside the base (1), and the second end of the worm (31) extends outside the base (1).

3. Bending test device according to claim 2, characterized in that the worm (31) extends in the width direction of the base (1), the two positioning members (2) being slidable in the length direction of the base (1).

4. The bending test device according to claim 1, wherein the distance adjusting assembly (3) further comprises two racks (34), the two racks (34) are engaged with the adjusting gear (33), the two racks (34) are slidably arranged on the base (1), when the adjusting gear (33) rotates, the two racks (34) move in opposite directions relative to the base (1) at the same time at the same speed, the two positioning members (2) are respectively connected with the two racks (34), and when the two racks (34) move, the two positioning members (2) are driven to move synchronously.

5. The bending test device according to claim 4, further comprising two mutually parallel slide grooves (4) provided on the base (1), the two racks (34) being slidably connected with the two slide grooves (4), respectively.

6. The bending test device according to claim 5, characterized in that the positioning element (2) is arranged at the end of the rack (34) and that the positioning element (2) is slidingly connected with the chute (4).

7. The bending test device according to claim 6, further comprising a carriage (5), one end of the carriage (5) being slidably arranged in the chute (4), the other end of the carriage (5) extending out of the chute (4) and being detachably connected to the positioning member (2).

8. The bending test device according to claim 1, wherein the adjusting gear (33) is disposed in the middle of the base (1), the two positioning members (2) are disposed at outer ends of the two racks (34), respectively, when the distance between the two positioning members (2) is the largest, the outer ends of the racks (34) are farther away from the adjusting gear (33) than the inner ends, and during the process of the two positioning members (2) approaching each other, the outer ends of the racks (34) are gradually close to the adjusting gear (33), and the inner ends of the racks (34) are gradually far away from the adjusting gear (33).

9. The bending test device according to any one of claims 1 to 8, wherein the loading head (10) is located between the two support parts (9) and higher than the two support parts (9), the bending test device further comprises a positioning piece (6), the positioning piece (6) is arranged on the base (1), the positioning piece (6) and the positioning piece (2) are respectively located on different sides of the base (1), and the positioning piece (6) is used for being clamped with the loading head (10) in the process that the two positioning pieces (2) are respectively clamped with the two support parts (9) to adjust the span of the two support parts (9).

10. Bending test device according to claim 9, characterized in that the positioning element (6) is detachably connected to the base (1).