Clamp

Abstract

The utility model provides a clamp, which is used for clamping a test piece and comprises a first clamping head and a second clamping head, the test piece is detachably connected between the first clamping head and the second clamping head; and adapters are arranged at the positions where the test piece is connected with the first clamping head and the second clamping head. According to the utility model, the adapter is additionally arranged at the position where the first clamping head and the second clamping head are connected with the test piece. The scheme has the advantages that when the test piece and the clamping device are bonded, the original bonding object between the clamping head and the test piece is changed into between the adapter and the test piece. The design equivalently replaces the consumption of a clamping head through an adapter. Compared with a clamping head, the adapter needs fewer materials, and the diameter and the length are greatly different, so that the material waste of the clamping head is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tensile, creep and fatigue test, especially to a clamp. BACKGROUND

[0002] At present, the clamp for tensile, creep and fatigue test is usually made of high-temperature alloy with high temperature resistance, which is expensive. In the test experiment, the clamp and the sample often stick together, which may cause the clamp to be unable to be used again, resulting in the clamp being scrapped. In addition, once sticking occurs, the process of taking out the sample is usually very difficult, wasting a lot of time, and the sample fracture is easily damaged in the process of taking out, which not only affects the preservation of test results, but also may cause the loss of test data. Therefore, how to avoid the sticking between the clamp and the sample becomes a technical problem to be solved in the field. SUMMARY

[0003] The utility model provides a clamp can avoid the sticking between the clamp and the sample in view of the prior art's insufficient.

[0004] The utility model provides a clamp for clamping test piece, the clamp includes first chuck head and second chuck head, the test piece is detachably connected between first chuck head and second chuck head, wherein, the test piece and first chuck head and second chuck head connected position all are provided with adapter.

[0005] Further, the adapter is cylindrical, the test piece is provided with connecting portion at both ends, the connecting portion is cylindrical, the first chuck head and the second chuck head are connected with the adapter at the position, and the adapter has connecting round hole; The inner diameter of the adapter matches the outer diameter of the connecting portion, and the outer diameter of the adapter matches the inner diameter of the connecting round hole.

[0006] Further, the adapter is a threaded adapter, which has internal threads on the inside and external threads on the outside; The connecting portion has connecting threads on the outside, and the connecting round hole has fixing threads on the inside; The internal threads are connected with the connecting threads, and the external threads are connected with the fixing threads.

[0007] Further, the outer diameter of the adapter is at least one time of the diameter of the connecting portion.

[0008] Further, the length of the adapter, the length of the connecting portion and the depth of the connecting round hole are equal.

[0009] Further, the outer edge of the first chuck head and the second chuck head has a fastening bayonet.

[0010] Further, the adapter is made of high-temperature-resistant alloy steel.

[0011] Further, the first chucking head and the second chucking head have external threads.

[0012] The utility model has the following beneficial effects: the utility model adds an adapter at the position where the first chucking head and the second chucking head are connected with the test piece. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments that are consistent with the present utility model and are used to explain the principles of the utility model.

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows, and obviously, other drawings can be obtained by those skilled in the art without creative labor under the premise of not paying the creative labor.

[0015] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplarily illustrations do not constitute the limitation to the embodiments, the elements with the same reference numerals in the drawings represent the similar elements, and the drawings do not constitute the proportional limitation unless specially declared.

[0016] Figure 1 The structure schematic view of a clamp of the utility model embodiment is shown in the figure.

[0017] Figure 2 The structure schematic view of a chucking head of the utility model embodiment is shown in the figure.

[0018] Figure 3 The structure schematic view of a test piece of the utility model embodiment is shown in the figure.

[0019] Figure 4 The structure schematic view of an adapter of the utility model embodiment is shown in the figure.

[0020] In the drawings, the following are marked:

[0021] 1: First clamping head; 11: Connecting round hole; 12: Fixing thread; 13: Fastening bayonet; 14: External thread; 2: Second clamping head; 3: Test piece; 31: Connecting part; 32: Connecting thread; 4: Adapter; 41: Internal thread; 42: External thread. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0025] like Figure 1 As shown, this utility model embodiment provides a clamp for holding a test piece 3. The clamp includes a first clamping head 1 and a second clamping head 2, and the test piece 3 is detachably connected between the first clamping head 1 and the second clamping head 2. An adapter 4 is provided at each connection point between the test piece 3 and the first clamping head 1 and the second clamping head 2. This utility model adds an adapter 4 at the connection point between the first clamping head 1 and the second clamping head 2 and the test piece 3. The advantage of this solution is that when the test piece 3 adheres to the clamping device, the original adhesion object changes from between the clamping head and the test piece 3 to between the adapter 4 and the test piece 3. This design is equivalent to replacing the consumption of the clamping head with the adapter 4. Compared to the clamping head, the adapter 4 requires significantly less material and has a larger difference in diameter and length, thereby greatly reducing the material waste of the clamping head. In a preferred embodiment, the adapter 4 is made of high-temperature resistant alloy steel, which can provide high strength and high temperature resistance during the test.

[0026] In a specific embodiment of this utility model, such asFigures 2-4 As shown, the adapter 4 is cylindrical, the test piece 3 is provided with a connecting portion 31 at both ends, the connecting portion 31 is cylindrical, the first chuck 1 and the second chuck 2 are provided with connecting round holes 11 at the positions connected with the adapter 4. The inner diameter of the adapter 4 matches the outer diameter of the connecting portion 31, and the outer diameter of the adapter 4 matches the inner diameter of the connecting round hole 11, so that the adapter 4 can be assembled between the chuck and the test piece 3, and the adapter 4 can buffer the deformation of the chuck.

[0027] In one aspect of the embodiment of the utility model, the adapter 4 is a threaded adapter, the inner side of the adapter 4 is provided with internal threads 41, and the outer side of the adapter 4 is provided with external threads 42; the outer side of the connecting portion 31 is provided with connecting threads 32, and the inner side of the connecting round hole 11 is provided with fixing threads 12; the internal threads 41 are connected with the connecting threads 32, and the external threads 42 are connected with the fixing threads 12. This design is equivalent to replacing the consumption of the chuck with the threaded adapter. It should be noted that the adapter 4 can also be connected by other connection methods, such as clamping, as long as the connection method can achieve the fixing effect, and the adapter 4 can buffer the deformation of the chuck.

[0028] In one aspect of the embodiment of the utility model, the outer diameter of the adapter 4 is at least one time of the diameter of the connecting portion 31. The reason why the threaded adapter and the chuck are not easy to bond is that the thread size between the threaded adapter and the chuck is much larger than the thread size between the threaded adapter and the test piece 3, and therefore the stress is much smaller. The main reason for the thread bonding is that the threads at both ends are subjected to the support force of the hydraulic pressure during the long-term stress deformation process, especially during the fatigue test, and the high-temperature environment usually causes the size of the threads at both ends to expand, so that the threads cannot be normally unscrewed. In the creep test, the threads are subjected to long-term stress, and therefore the threads and the chuck are bonded due to the creep. In comparison, the bonding problem in the tensile test is relatively light, but if the temperature is too high or the material is not resistant to high temperature, the bonding phenomenon is still likely to occur. In the utility model, the ratio of the inner diameter to the outer diameter of the adapter 4 is as large as possible, and the stress on the threads of the chuck can be buffered, so that the bonding phenomenon between the test piece 3 and the chuck is avoided.

[0029] Preferably, the length of the adapter 4, the length of the connecting portion 31, and the depth of the connecting round hole 11 are equal. This cooperation improves the tightness of the connection between structures and reduces loose movement. The outer edge of the first chuck 1 and the second chuck 2 is provided with a fastening bayonet 13. The fastening bayonet 13 cooperates with the external fastening tool, so that the chuck can be conveniently assembled and disassembled on the test platform. In a specific embodiment, the outer side of the first chuck 1 and the second chuck 2 is provided with external threads 14, and the first chuck 1 and the second chuck 2 are connected to the test platform through the external threads 14.

[0030] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0031] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0032] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0033] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be connected, or it can be detachable, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and inclined upper of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and inclined lower of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0035] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0036] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, these modifications and variations of the present application are also intended to be included within the scope of the claims of the present application and equivalents thereof. Therefore, the scope of protection of the present application should be subject to the scope of protection of the claims.

[0037] The above is a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A clamp, characterized in that, The fixture is used to hold the test specimen (3), and includes: A first clamping head (1) and a second clamping head (2); the test piece (3) is detachably connected between the first clamping head (1) and the second clamping head (2); Among them, the test piece (3) is provided with an adapter (4) at the position where it is connected to the first clamping head (1) and the second clamping head (2); The adapter (4) is cylindrical, and the test piece (3) has connecting parts (31) at both ends. The connecting parts (31) are cylindrical, and the first clamping head (1) and the second clamping head (2) have connecting holes (11) at the positions where they are connected to the adapter (4). The inner diameter of the adapter (4) matches the outer diameter of the connecting part (31), and its outer diameter matches the inner diameter of the connecting hole (11).

2. The clamp according to claim 1, characterized in that, The adapter (4) is a threaded adapter, with an internal thread (41) on its inner side and an external thread (42) on its outer side; the outer side of the connecting part (31) has a connecting thread (32), and the inner side of the connecting round hole (11) has a fixing thread (12); the internal thread (41) is connected to the connecting thread (32), and the external thread (42) is connected to the fixing thread (12).

3. The clamp according to claim 2, characterized in that, The outer diameter of the adapter (4) is at least twice the diameter of the connecting part (31).

4. The clamp according to claim 3, characterized in that, The length of the adapter (4), the length of the connecting part (31), and the depth of the connecting hole (11) are equal.

5. The clamp according to claim 1, characterized in that, The outer edges of the first clamping head (1) and the second clamping head (2) have fastening slots (13).

6. The clamp according to any one of claims 1 to 5, characterized in that, The adapter (4) is made of high-temperature resistant alloy steel.

7. The clamp according to any one of claims 1 to 5, characterized in that, The outer surfaces of the first clamping head (1) and the second clamping head (2) have external threads (14).

Images