CN219015873U

CN219015873U - Clamping tool matched with bending fatigue test

Info

Publication number: CN219015873U
Application number: CN202223350208.5U
Authority: CN
Inventors: 吴中旺; 李继伟; 周星呈
Original assignee: Suzhou Qingjiu Automobile Technology Co ltd
Current assignee: Suzhou Qingjiu Automobile Technology Co ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-05-12
Anticipated expiration: 2032-12-14

Abstract

The application relates to a cooperation bending fatigue test's centre gripping frock, including the fixed plate, the connecting piece, clamping assembly, support piece and pressure display module, clamping assembly's base and clamp plate cooperation are in order to fix test sample spare centre gripping in accurate position, improve test result's precision and reliability, simultaneously, pressure display module can show the clamping force of clamping assembly centre gripping test sample spare in real time, guarantee the clamping strength of clamping assembly to test sample spare, avoid damaging test sample spare because of the clamping force is too big, also avoid playing spacing effect because of the clamping force is too little, guarantee test sample spare accuracy and place on the test position of awaiting measuring of fatigue testing machine steadily, guarantee bending fatigue test's precision.

Description

Clamping tool matched with bending fatigue test

Technical Field

The utility model relates to a clamping tool matched with a bending fatigue test.

Background

Fatigue testing is one of the reliability tests, which is an effective means of obtaining a large amount of material fatigue performance data. Bending fatigue tests are used to determine the effect of machining, surface conditions, stress, etc. on the fatigue resistance of a material under a relatively large number of cycles of bending stress. The results of the study may also be used as a guide for selecting materials under repeated bending stress conditions, while helping to predict material fatigue life.

At present, a test sample is generally placed between a support part and a pressure head part of a fatigue testing machine through manual operation, and then repeated bending fatigue tests are carried out. However, during manual operation, due to factors such as hand shake of an operator and personal judgment difference, it is difficult to ensure that a test sample is horizontally placed between a supporting component and a pressure head component, so that the precision of a test result is poor, and the self judgment standards of different experimenters are different, so that larger data discreteness is caused. Even the present frock is provided with the clamping structure with test sample centre gripping and place between supporting part and pressure head part, but its clamping force to test sample can not guarantee, and clamping force is too big, probably can harm test sample, and the clamping force is too little then is difficult to play spacing fixed effect, causes test sample unable to remain steady state throughout before the test formally begins.

Disclosure of Invention

The utility model aims to provide a clamping tool matched with a bending fatigue test, which has high test precision and effectively protects a test sample, and reduces test errors caused by human factors.

In order to achieve the above purpose, the present utility model provides the following technical solutions: clamping tool for cooperation bending fatigue test, including:

a fixing plate;

one end of the connecting piece is connected to the fixed plate, and the other end of the connecting piece is detachably connected with the fatigue testing machine;

the clamping assemblies are provided with two groups, the two groups of clamping assemblies are arranged at the two ends of the fixed plate in a sliding manner, the clamping assemblies comprise bases arranged on the fixed plate in a sliding manner and pressing plates detachably connected with the bases, and the bases and the pressing plates are matched to clamp and fix a test sample;

the two supporting pieces are arranged and are arranged on the fixed plate in a sliding manner relatively;

the pressure display assembly comprises a pressure display meter arranged on the fixed plate and two pressure sensors connected with the pressure display meter, wherein the two pressure sensors are respectively arranged on a group of clamping assemblies so as to detect the clamping force of the clamping assemblies for clamping test samples.

Further, the pressure sensor is disposed on the base or the platen.

Further, the clamping assembly further comprises at least one fastener, a through hole matched with the fastener is formed in the pressing plate, a matching hole matched with the fastener is formed in the base at the corresponding position of the through hole, and one end of the fastener sequentially penetrates through the through hole and the matching hole to connect the base with the pressing plate.

Further, the fastener is a bolt having an external thread, and the through hole and the fitting hole each have an internal thread that fits with the external thread.

Further, the fixing plate is provided with at least one group of chute assemblies, each chute assembly comprises two chutes which are oppositely arranged at two sides of the connecting piece, each chute extends along the longitudinal direction of the fixing plate, the base is connected to the fixing plate through a fixing piece, each fixing piece comprises a limiting part and a fixing part connected with the limiting part, the limiting parts and the base are oppositely arranged at two sides of the fixing plate, and one end of each fixing part, far away from each limiting part, penetrates through each chute and then is detachably connected with the base.

Further, the fixing piece is a bolt, a screw hole matched with the bolt is formed in the base, and the bolt is matched with the screw hole so as to detachably connect the fixing piece with the base.

Further, the chute assembly is provided with two groups, two screw holes are formed in the base, and the screw holes and the chute assembly are correspondingly arranged.

Further, the supporting piece is connected to the fixing plate through the mounting piece, and one end of the mounting piece penetrates through the sliding groove and then is detachably connected with the supporting piece.

Further, the mounting piece is a bolt, and the supporting piece is provided with a threaded hole matched with the bolt.

Further, the support is disposed inside the clamping assembly.

The utility model has the beneficial effects that: the clamping fixture for the cooperation bending fatigue test comprises a clamping assembly arranged on a fixed plate in a sliding manner, a base of the clamping assembly is matched with a pressing plate to clamp and fix a test sample at an accurate position, so that the accuracy and reliability of a test result are improved, meanwhile, a pressure display assembly of the clamping fixture can display the clamping force of the clamping assembly to clamp the test sample in real time, the clamping force of the clamping assembly to the test sample is ensured, the test sample is prevented from being damaged due to overlarge clamping force, the limiting effect due to overlarge clamping force is avoided, and the test sample is ensured to be accurately and stably placed at a position to be tested of a fatigue tester, so that the accuracy of the bending fatigue test is ensured.

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of a clamping tool for a bending fatigue test according to the present utility model.

Fig. 2 is a schematic structural diagram of the clamping tool shown in fig. 1 in cooperation with a bending fatigue test.

Fig. 3 is a schematic view of the structure of the fixing plate and the connection member shown in fig. 1.

Fig. 4 is a schematic structural view of the support shown in fig. 1.

Fig. 5 is a schematic view of the structure of the base in the clamping assembly shown in fig. 1.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. 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.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the mechanisms or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1 to 3, a clamping tool for a bending fatigue test according to an embodiment of the utility model includes a fixing plate 3 and a connecting member 2 connected to the fixing plate 3. The connecting member 2 has one end connected to the fixing plate 3 and the other end detachably connected to a fatigue tester (not shown). The clamping tool is connected to the knife fatigue testing machine through the connecting piece 2 so as to carry out bending fatigue test on the test sample.

It is obvious that the clamping tool shown in this embodiment is used as a pressure head component, the fatigue testing machine further has a supporting component (not shown) matched with the pressure head component, the supporting component has a support for supporting the test sample, and the supporting component and the fatigue testing machine are both in the prior art and are not described in detail herein.

The connector 2 may be a screw or the like, and is not particularly limited herein, as long as it can detachably connect the fixing plate 3 and the fatigue testing machine.

Referring to fig. 1 and 3, the fixing plate 3 has at least one set of chute assemblies 31, and the chute assemblies 31 include two chute 311 disposed opposite each other on both sides of the connecting member 2, and the chute 311 extends along the longitudinal direction of the fixing plate 3. The sliding groove 311 penetrates the fixing plate 3 in the height direction of the fixing plate 3, that is, the sliding groove 311 communicates with the upper and lower surfaces of the fixing plate 3.

In the present embodiment, the two sliding grooves 311 of the sliding groove assembly 31 are on the same straight line along the longitudinal direction of the fixing plate 3. The length of the slide groove 311 is not particularly limited, and preferably extends in the longitudinal direction of the fixing plate 3 as much as possible. The width of the chute 311 is not particularly limited, and may be set according to actual needs.

The chute assemblies 31 are provided in two sets, with the two sets of chute assemblies 31 being disposed opposite each other on either side of the connecting member 2. In other embodiments, the chute assembly 31 can be provided in three groups, four groups, etc., not specifically recited herein.

Referring to fig. 1, 2 and 5, the clamping fixture further includes clamping assemblies for clamping the test piece 8, wherein the clamping assemblies are provided with two groups, and the two groups of clamping assemblies are relatively slidably disposed at two ends of the fixing plate 3, that is, relatively disposed at two sides of the connecting piece 2. The two groups of clamping assemblies respectively clamp the two ends of the test sample 8, so that the test sample 8 is fixed on the clamping tool.

The clamping assembly is arranged on the fixed plate 3 through the sliding groove 311, and can be arranged at any position of the sliding groove 311 because the sliding groove 311 extends along the longitudinal direction of the fixed plate 3, so that the distance between the two groups of clamping assemblies is adjustable, the clamping tool can clamp test sample pieces 8 with different sizes, the distance between the two groups of clamping assemblies is adjusted according to the specific length of the test sample pieces 8, and the practicability of the clamping tool is improved.

The clamping assembly comprises a base 1 slidably arranged on a fixed plate 3, a pressing plate 7 detachably connected with the base 1, and at least one fastener 4.

The base 1 is of an I-shaped structure, and the pressing plate 7 is of a long plate-shaped structure. The base 1 is connected to the fixing plate 3 by a fixing member 11 to achieve connection of the clamping assembly and the fixing plate 3. The fixing piece 11 comprises a limiting part and a fixing part connected with the limiting part, the limiting part and the base 1 are oppositely arranged on two sides of the fixing plate 3, and one end, away from the limiting part, of the fixing part penetrates through the sliding groove 311 and then is detachably connected with the base 1. The width of the limiting portion is greater than the width of the sliding groove 311, and the width of the fixing portion is less than the width of the sliding groove 311.

In this embodiment, the fixing member 11 is a bolt, and the base 1 is provided with a screw hole 12 matched with the bolt, and the bolt is matched with the screw hole 12 to realize detachable connection of the fixing member 11 and the base 1. The two sets of sliding groove assemblies 31 are arranged, so that two screw holes 12 are arranged on the base 1, and the screw holes are correspondingly arranged with the sliding groove assemblies 31, namely, the two screw holes are respectively arranged in one-to-one correspondence with the sliding grooves 311. A base 1 is connected to the fixing plate 3 by two fixing members 11 to increase the connection stability of the base 1 and the fixing plate 3. Screw holes 12 are provided on the upper plate of the i-shaped structure of the base 1 to improve operability.

When the distance between the two groups of clamping assemblies needs to be changed, the fixing piece 11 is unscrewed from the base 1, the base 1 can relatively and fixedly slide, the fixing piece 11 slides to a required position, the base 1 can be fixed relative to the fixing plate 3 by screwing the fixing piece 11 relative to the base 1, and the operation is simple.

The pressing plate 7 is provided with a through hole (not shown) for matching with the fastening member 4, the base 1 is provided with a matching hole 13 for matching with the fastening member 4 at a corresponding position of the through hole, and one end of the fastening member 4 sequentially passes through the through hole and the matching hole 13 to connect the base 1 and the pressing plate 7. In this embodiment, the fastener 4 is a bolt having an external thread, and the through hole and the fitting hole 13 each have an internal thread that is fitted with the external thread. Through the cooperation of internal thread and external screw thread, fastener 4 realizes being connected with base 1 and clamp plate 7 detachably to realize the detachably connection of base 1 and clamp plate 7.

The base 1 and the pressing plate 7 are matched to clamp and fix the test sample 8, the test sample 8 can be placed at the position to be tested of the fatigue testing machine without manual operation, the problem that the test precision is poor due to errors of manual operation is avoided, and the precision and the reliability of the test result are improved. It is obvious that test pieces 8 with various thickness sizes can be clamped between the base 1 and the pressing plate 7, and the fastener 4 only needs to be adjusted.

The fitting hole 13 is provided on the lower plate of the i-shaped structure of the base 1. In order to further improve the clamping stability of the clamping assembly for clamping the test piece 8, two matching holes 13 are formed in each base 1, and two through holes are formed in each pressing plate 7. Two fitting holes 13 are provided at both ends of the lower plate of the base 1 in the longitudinal direction, respectively. The two through holes are respectively arranged corresponding to one matching hole 13. When the test sample 8 is clamped on the clamping assembly, the two matching holes 13 are respectively positioned on two sides of the test sample 8, so that the test sample 8 does not need to be perforated, the fastening piece 4 passes through the pressing plate 7, passes through the outer side of the test sample 8 and is matched with the base 1.

The distance between the two matching holes 13 is set according to actual needs, and the width of all test pieces 8 is suitable.

The clamping force of the clamping assembly to clamp the test piece 8 is adjusted by tightening or loosening the fastener 4. The clamping fixture further comprises a pressure display assembly, wherein the pressure display assembly comprises a pressure display meter 5 arranged on the fixed plate 3 and two pressure sensors (not shown) connected with the pressure display meter 5. The two pressure sensors are respectively arranged on a group of clamping assemblies to detect the clamping force of the clamping assemblies to clamp the test sample 8. The pressure sensor is arranged on the base 1 or the pressure plate 7. When the pressure displayed by the pressure display meter 5 is greater than 0 and less than the maximum pressure value which can be borne by the test sample 8, the clamping force of the clamping assembly for clamping the test sample 8 is proper. The pressure display assembly can display the clamping force of the clamping assembly for clamping the test sample 8 in real time, so that the clamping force of the clamping assembly to the test sample 8 is ensured, the test sample 8 is prevented from being damaged due to overlarge clamping force, the limiting effect due to overlarge clamping force is also avoided, the test sample 8 is ensured to be accurately and stably placed at the position to be tested of the fatigue testing machine, and the precision of the bending fatigue test is ensured.

Meanwhile, for a test sample 8, the clamping force of the clamping assembly can be controlled, and accurate accumulation of test data and execution of a standardized scheme are facilitated.

Referring to fig. 1, 2 and 4, the clamping fixture further includes two supporting members 6, and the two supporting members 6 are relatively slidably disposed on the fixing plate 3. And two supporting members 6 are oppositely disposed at both sides of the connecting member 2.

The supporting member 6 is connected to the fixing plate 3 through the mounting member 61, and one end of the mounting member 61 is detachably connected to the supporting member 6 after passing through the sliding groove 311. The mounting member 61 is a bolt, and the support member 6 is provided with a screw hole 62 to be engaged with the bolt. The connection mode of the supporting member 6 and the fixing plate 3 is the same as the connection mode of the base 1 and the fixing plate 3, and will not be described here again.

The support 6 is arranged inside the clamping assembly. The three support pieces 6 and the support seats of the support parts are matched to realize three-point bending fatigue test on the test sample piece 8.

The distance between the two supporting pieces 6 can be adjusted, so that the adjustment can be performed according to the area where the test sample piece 8 needs to be applied with force, and the applicability of the clamping tool is improved.

It should be noted that, after the test sample 8 is mounted at the position to be tested, the fastener 4 needs to be unscrewed or the pressing plate 7 needs to be withdrawn, so as to facilitate the smooth performance of the bending fatigue test of the subsequent test sample 8.

In conclusion, the clamping fixture for the bending fatigue test comprises a clamping assembly arranged on a fixed plate in a sliding manner, the base of the clamping assembly is matched with a pressing plate to clamp and fix a test sample at an accurate position, the accuracy and reliability of a test result are improved, meanwhile, the pressure display assembly of the clamping fixture can display the clamping force of the clamping assembly to clamp the test sample in real time, the clamping force of the clamping assembly to the test sample is ensured, the test sample is prevented from being damaged due to overlarge clamping force, the limiting effect due to overlarge clamping force is also avoided, the test sample is ensured to be accurately and stably placed at the position to be tested of the fatigue tester, and the accuracy of the bending fatigue test is ensured.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. Clamping tool for cooperation bending fatigue test, which is characterized by comprising:

a fixing plate;

2. The fixture for a bending fatigue test according to claim 1, wherein the pressure sensor is provided on the base or the pressure plate.

3. The clamping tool for a bending fatigue test according to claim 1, wherein the clamping assembly further comprises at least one fastener, a through hole matched with the fastener is formed in the pressing plate, a matching hole matched with the fastener is formed in the base at a position corresponding to the through hole, and one end of the fastener sequentially penetrates through the through hole and the matching hole to connect the base and the pressing plate.

4. A clamping tool for a mating bending fatigue test according to claim 3 wherein the fastener is a bolt having external threads, and the through hole and the mating hole each have internal threads that mate with the external threads.

5. The fixture for testing bending fatigue according to claim 1, wherein the fixing plate has at least one set of chute assemblies, the chute assemblies include two chutes disposed on two sides of the connecting member, the chute extends along a longitudinal direction of the fixing plate, the base is connected to the fixing plate by a fixing member, the fixing member includes a limiting portion and a fixing portion connected to the limiting portion, the limiting portion and the base are disposed on two sides of the fixing plate, and an end of the fixing portion away from the limiting portion is detachably connected to the base after passing through the chute.

6. The fixture for a bending fatigue test according to claim 5, wherein the fixing member is a bolt, a screw hole matched with the bolt is formed in the base, and the bolt is matched with the screw hole to detachably connect the fixing member and the base.

7. The fixture for testing bending fatigue according to claim 6, wherein the chute assembly is provided with two groups, the base is provided with two screw holes, and the screw holes and the chute assembly are correspondingly arranged.

8. The fixture for testing bending fatigue according to claim 5, wherein the supporting member is connected to the fixing plate by a mounting member, and one end of the mounting member is detachably connected to the supporting member after passing through the sliding slot.

9. The fixture for a bending fatigue test according to claim 8, wherein the mounting member is a bolt, and the supporting member is provided with a threaded hole which is matched with the bolt.

10. The clamp tooling for a bending fatigue test according to claim 1, wherein the support is disposed inside the clamp assembly.