Fixing clamp for preparing tensile test piece

Abstract

The utility model discloses a tensile test piece preparation stationary fixture, and relates to the technical field of cold spraying, the tensile test piece preparation stationary fixture comprises a base and a fixing assembly, the upper side of the base is provided with a positioning groove extending along a first direction, and the positioning groove is used for placing two tensile shafts and a sample block; the number of the fixing assemblies is two, each fixing assembly comprises a driving part and a fixing part which can be movably arranged in the positioning groove in the first direction, the driving parts are in driving connection with the fixing parts so as to drive the fixing parts to move in the first direction, and the two fixing parts are oppositely arranged and used for abutting against the opposite ends of the two stretching shafts correspondingly. And the sample block is clamped by the two stretching shafts. According to the technical scheme provided by the utility model, during heating and curing, the fixing stability of the two stretching shafts and the test block is kept under the combined action of heating, the two fixing parts and the positioning grooves together with the fixing clamp for preparing the stretching test piece, and the finished product yield of the cold spraying coating stretching test piece is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold spraying technical field especially relates to a kind of tensile test piece preparation fixing clamp. BACKGROUND

[0002] In the application of cold spraying technology, the tensile strength of coating is an important index to evaluate its performance. The traditional tensile strength test method usually involves cutting the tensile shaft test piece into two sections, and connecting the broken shaft with the test sample block using adhesive. In the related art, when preparing the test piece, the test piece needs to be heated to high temperature and kept for a period of time to achieve effective bonding. However, when the test piece is placed in the boiler, it is easy to cause deformation or misalignment of the test piece, thereby affecting the accuracy of the subsequent tensile test results of the test piece. SUMMARY

[0003] The main purpose of the utility model is to provide a kind of tensile test piece preparation fixing clamp, to at least solve the technical problem that in the related art, when preparing the test piece, the test piece needs to be heated to high temperature and kept for a period of time to achieve effective bonding. However, when the test piece is placed in the boiler, it is easy to cause deformation or misalignment of the test piece, thereby affecting the accuracy of the subsequent tensile test results of the test piece.

[0004] To achieve the above purpose, the utility model provides a kind of tensile test piece preparation fixing clamp, for fixing cold spraying coating tensile test piece, the cold spraying coating tensile test piece includes the test sample block with cold spraying coating and two opposite tensile shafts, the test sample block is bonded between two tensile shafts, the tensile test piece preparation fixing clamp includes:

[0005] A base is provided with a positioning slot extending in a first direction on its upper side, and the positioning slot is used to place two tensile shafts and the test sample block; and,

[0006] Two fixing assemblies are provided, the fixing assembly includes a driving part and a fixing part movably arranged in the positioning slot in the first direction, the driving part is drivingly connected with the fixing part to drive the fixing part to move in the first direction, and the two fixing parts are oppositely arranged to abut against one end of the two tensile shafts respectively, so that the two tensile shafts clamp the test sample block.

[0007] In an embodiment, the two side walls of the positioning slot in the second direction are tapered from top to bottom, and the second direction intersects the first direction.

[0008] In an embodiment, the driving part and the fixing part are separately arranged; and / or,

[0009] The cross section of the fixing part is circular.

[0010] In an embodiment, the driving part comprises a first threaded rod extending in the first direction, the first threaded rod being threadedly connected with the base, one end of the first threaded rod extending into the positioning slot and being drivingly connected with the fixing part to drive the fixing part to move in the first direction.

[0011] In an embodiment, the other end of the first threaded rod is provided with a knob.

[0012] In an embodiment, the base and / or the fixing part is made of low-expansion material.

[0013] In an embodiment, the bottom of the positioning slot is provided with a receiving slot.

[0014] The tensile specimen preparation fixing clamp further comprises a support block detachably installed in the receiving slot, the support block being used to support the specimen block.

[0015] In an embodiment, the receiving slot is in communication with the lower side of the base.

[0016] In an embodiment, the tensile specimen preparation fixing clamp further comprises at least two fastening assemblies, each of the fastening assemblies comprising a fastening part movably arranged in the positioning slot in the up-down direction, the fastening part being used to abut against the upper side of the tensile shaft.

[0017] In an embodiment, the fastening assembly further comprises:

[0018] a fixing plate fixedly installed on the upper side of the base; and

[0019] a second threaded rod extending in the up-down direction, the lower end of the second threaded rod extending into the positioning slot and being connected with the fastening part.

[0020] The utility model discloses a technical scheme, the tensile test piece preparation fixed clamp includes base and fixed assembly, the upside of base is provided with the positioning slot of extending along the first direction, fixed assembly, setting is two, the fixed assembly includes the drive part and the fixed part of the movable setting in the positioning slot along the first direction, the drive part is connected with the fixed part drive, to drive the fixed part moves along the first direction, two fixed parts are opposite setting, so when preparing the cold spraying coating tensile test piece, two tensile shafts and the sample block are placed in the positioning slot, and preliminary positioning is carried out through the positioning slot, and then the drive part of two fixed assemblies drives each fixed part to move, so that two fixed parts are respectively with the end of two tensile shafts opposite abutting tightly, so that two tensile shafts clamp the sample block, so set, together with the tensile test piece preparation fixed clamp one pass heating when heating and solidifying, the common effect of two fixed parts and the positioning slot, keep the stability of two tensile shafts and the test block, improve the finished product yield of the cold spraying coating tensile test piece. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to the structure shown in these drawings without creating labor.

[0022] Figure 1 The structure schematic diagram of one embodiment of the tensile test piece preparation fixed clamp provided by the utility model is shown in the drawing.

[0023] Figure 2 For Figure 1 The top view structure schematic diagram of the tensile test piece preparation fixed clamp is shown in the drawing.

[0024] Figure 3 For Figure 2 The A-A section structure schematic diagram is shown in the drawing.

[0025] Explanation of reference numerals:

[0026] 100, tensile test piece preparation fixed clamp, 1, base, 11, positioning slot, 12, containing groove, 2, fixed assembly, 21, first threaded rod, 22, fixed part, 23, knob, 3, support block, 4, fastening assembly, 41, fastening part, 42, fixed plate, 43, second threaded rod,

[0027] 200, cold spraying coating tensile test piece, 201, sample block, 202, tensile shaft.

[0028] The purposes, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0030] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0031] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one feature. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0032] In the application of cold spraying technology, the tensile strength of the coating is an important index for evaluating its performance. The traditional tensile strength test method usually involves cutting the tensile shaft sample into two sections, and connecting the broken shaft and the sample block using adhesive. In the related art, when preparing the sample, the sample needs to be heated to high temperature for a period of time to achieve effective bonding, but when the sample is placed in the boiler, the sample is prone to deformation or misalignment, thereby affecting the accuracy of the subsequent tensile test results of the sample.

[0033] The utility model discloses a main purpose is to propose a kind of tensile test piece preparation fixed clamp, to at least solve the technical problem in relevant art in the preparation test piece, need to be heated to high temperature and keep a period of time to realize effective bonding, but when the test piece is placed in boiler, it is easy to cause the deformation or misalignment of test piece, to affect the accuracy of subsequent tensile test result of test piece.

[0034] Please refer to Figure 1 And Figure 2 In the utility model an embodiment, the tensile test piece preparation fixed clamp 100 for fixing cold spray coating tensile test piece 200, the cold spray coating tensile test piece 200 includes the test sample block 201 with cold spray coating and two opposite setting tensile shafts 202, the test sample block 201 is bonded between two the tensile shaft 202, the tensile test piece preparation fixed clamp 100 includes base 1 and fixed assembly 2, the upper side of base 1 is provided with the positioning slot 11 extending along the first direction, the positioning slot 11 is used to place two the tensile shaft 202 and the test sample block 201;Fixed assembly 2 is provided with two, and the fixed assembly 2 includes driving portion and the fixed part 22 that can be set in the positioning slot 11 along the first direction, the driving portion is drivenly connected with the fixed part 22, to drive the fixed part 22 along the first direction activity, two the fixed part 22 is oppositely arranged, and is used to respectively abut with the end opposite to two the tensile shaft 202, so that two the tensile shaft 202 clamps the test sample block 201.

[0035] In the utility model technical scheme, the tensile test piece preparation fixed clamp 100 includes base 1 and fixed assembly 2, the upper side of base 1 is provided with the positioning slot 11 extending along the first direction, fixed assembly 2, provided with two, the fixed assembly 2 includes driving portion and the fixed part 22 that can be set in the positioning slot 11 along the first direction, the driving portion is drivenly connected with the fixed part 22, to drive the fixed part 22 along the first direction activity, two the fixed part 22 is oppositely arranged;So when preparing the cold spray coating tensile test piece 200, two the tensile shaft 202 and the test sample block 201 are placed in the positioning slot 11, preliminary positioning is carried out through the positioning slot 11, and then the driving portion of two the fixed assembly 2 drives each the fixed part 22 to move, so that two fixed parts 22 abut with the end opposite to two the tensile shaft 202 respectively, so that two the tensile shaft 202 clamps the test sample block 201, so setting, along with the tensile test piece preparation fixed clamp 100 one pass heating when heating and curing, the common effect of two the fixed part 22 and the positioning slot 11, keep the stability of two the tensile shaft 202 and the test block, improve the yield of the cold spray coating tensile test piece 200.

[0036] In order to enable the positioning groove 11 to adapt to different cold spraying coating tensile test pieces 200, in the embodiment of the utility model, please refer to Figure 3 , the two side walls of the positioning groove 11 in the second direction are tapered in the upward direction, and the second direction intersects the first direction. When different specifications of the cold spraying coating tensile test piece 200 need to be prepared, the diameters of the corresponding tensile shaft 202 and the sample block 201 will also be different, and in this embodiment, the cross section of the whole positioning groove 11 is conical, so that the tensile shaft 202 and the sample block 201 of different diameters can be directly placed in the positioning groove 11, and the two side walls of the positioning groove 11 in the second direction can quickly position the tensile shaft 202 and the sample block 201 in the appropriate position, so that different cold spraying coating tensile test pieces 200 can be adapted.

[0037] It can be understood that the cross section of the tensile shaft 202 is generally circular, and the cross section of the fixing part 22 can be circular, square or other shapes; however, when the cross section of the fixing part 22 is square, it is not possible to ensure that the fixing part 22 is in contact with each part of the end face of the tensile shaft 202 during the fixing of the tensile shaft 202, and during the heating process, the tensile shaft 202 may not be aligned in the axial direction due to uneven force, so in this embodiment, the cross section of the fixing part 22 is circular, so that the fixing part 22 can be in contact with each part of the end face of the tensile shaft 202 during the fixing of the tensile shaft 202, thereby improving the uniformity of the force acting on the tensile shaft 202.

[0038] The fixing part 22 is used to clamp the end of the tensile shaft 202, and when the specifications of the cold spraying coating tensile test piece 200 are different, the diameters of the tensile shaft 202 will also be different. If the diameter of the fixing part 22 is different from the diameter of the tensile shaft 202, whether it is larger or smaller, it will cause the fixing part 22 to be unable to clamp the entire end of the tensile shaft 202, that is, during the heating process, the tensile piece may unexpectedly deform due to uneven force at different positions, which may cause the cold spraying coating tensile test piece 200 to deviate greatly from the ideal shape, thereby affecting the subsequent tensile strength test. Therefore, in the embodiment of the utility model, the driving part and the fixing part 22 are separately arranged; in this way, when the specifications of the tensile shaft 202 are different, the fixing part 22 can be removed from the positioning groove 11 by separating the driving part and the fixing part 22, so that the fixing part 22 of the corresponding specification can be replaced, thereby ensuring the uniformity of the force acting on the tensile shaft 202.

[0039] The driving part has various forms, can be electric such as a cylinder, or manual, in the embodiment, the driving part comprises a first threaded rod 21 extending in the first direction, the first threaded rod 21 is in threaded connection with the base 1, one end of the first threaded rod 21 extends into the positioning groove 11 and is in driving connection with the fixed part 22, so as to drive the fixed part 22 to move in the first direction. In the embodiment, the fixed part 22 is driven in a manual mode by the first threaded rod 21, and the movement of the fixed part 22 in the first direction can be realized by rotating the first threaded rod 21, which is convenient and fast and can ensure that the fixed part 22 stably clamps and fixes the stretching shaft 202; compared with the electric mode, the first threaded rod 21 is not easy to be damaged by heat during heat curing, and the cost is low.

[0040] In order to facilitate the rotation of the first threaded rod 21, the other end of the first threaded rod 21 is provided with a knob 23 in the embodiment.

[0041] Since the stretching specimen preparation fixing clamp 100 also needs to be heated together with the cold spraying coating stretching specimen 200, when the base 1 and the fixed part 22 are deformed by heat, the shape of the final cold spraying coating stretching specimen 200 will also be affected. In order to reduce the influence of the heat deformation of the base 1 and the fixed part 22 on the stretching shaft 202 and the sample block 201, in the embodiment of the utility model, the material of the base 1 and / or the fixed part 22 is a low expansion material, so that the base 1 and the fixed part 22 can remain stable during heating, thereby maintaining the stable positioning of the stretching shaft 202 and the sample block 201.

[0042] The low expansion material has various forms, such as stainless steel, aluminum oxide, and some low expansion alloys, which are not limited in the application.

[0043] It can be understood that before the stretching shaft 202 is fixed by the fixed part 22, glue needs to be coated between the stretching shaft 202 and the sample block 201, and part of the glue may fall into the positioning groove 11 before the glue is cured by heating, thereby causing adhesion with the base 1, and it will be more troublesome to take out after subsequent heating is completed, and the cleaning of the positioning groove 11 will also be more troublesome. Therefore, in the embodiment of the utility model, please refer to Figure 2 and Figure 3The bottom of the positioning groove 11 is provided with a containing groove 12; the tensile specimen preparation fixing clamp 100 further comprises a supporting block 3 detachably installed in the containing groove 12, and the supporting block 3 is used for supporting the test block 201. In this way, the test block 201 is supported by the supporting block 3, and the glue between the tensile shaft 202 and the test block 201 only falls on the supporting block 3. After heating, even if the cold spraying coating tensile specimen 200 is bonded with the test block 201, the test block 201 is taken out together, and then the test block 201 is separated. After the test block 201 is taken out, it is convenient to clean. At the same time, if it is necessary to continuously produce a plurality of cold spraying coating tensile specimens 200 in a short time and the supporting block 3 cannot be cleaned in time, the supporting block 3 can be directly replaced.

[0044] In order to facilitate the separation of the test block 201 and the supporting block 3, further, in the embodiment, the containing groove 12 is communicated with the lower side of the base 1; in this way, the supporting block 3 can be taken out from the bottom of the base 1. If the test block 201 and the supporting block 3 are bonded, in the process of taking out the supporting block 3, the cold spraying coating tensile specimen 200 is supported by the bottom of the positioning groove 11, so that the supporting block 3 and the test block 201 can be directly separated, and the operation is more convenient.

[0045] In order to improve the fixing effect of the tensile shaft 202, in the embodiment, please refer to Figure 1 and Figure 3 The tensile specimen preparation fixing clamp 100 further comprises at least two fastening components 4, the fastening component 4 comprises a fastening part 41 movably arranged in the positioning groove 11 in the up-down direction, and the fastening part 41 is used for abutting against the upper side of the tensile shaft 202. In this way, the fastening part 41 applies downward pressure to the tensile shaft 202, reduces the possibility of thermal deformation of the tensile shaft 202 upward during heating, and improves the yield of finished products.

[0046] The driving mode of the fastening part 41 is various, can be electric such as cylinder, also can be manual, in the technical scheme of the embodiment, the fastening assembly 4 further includes a fixed plate 42 and a second threaded rod 43, the fixed plate 42 is fixedly installed on the upper side of the base 1, the second threaded rod 43 extends in the up-down direction, the lower end of the second threaded rod 43 extends into the positioning groove 11 and is connected with the fastening part 41. That is, in the embodiment, the second threaded rod 43 is manually driven, and the fastening part 41 can be moved in the up-down direction by rotating the second threaded rod 43, which is convenient and can ensure that the fastening part 41 stably clamps and fixes the stretching shaft 202; compared with the electric mode, the second threaded rod 43 is not easy to be damaged by heat during heat curing, and the cost is low.

[0047] Of course, in order to manually rotate the second threaded rod 43, in the embodiment, a rotating handle is arranged at the end of the second threaded rod 43 away from the fastening part 41.

[0048] The above is only an exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation, direct / indirect application in other related technical fields within the technical concept of the utility model, and the contents of the utility model specification and drawings are included in the patent protection range of the utility model.

Claims

1. A tensile specimen preparation and fixing fixture for fixing a cold-sprayed coated tensile specimen, the cold-sprayed coated tensile specimen comprising a specimen block having a cold-sprayed coating and two opposing tensile shafts, the specimen block being bonded between the two tensile shafts, characterized in that, The tensile specimen preparation fixing clamp comprises: a base, an upper side of which is provided with a positioning groove extending in a first direction, the positioning groove being used for placing two tensile shafts and a specimen block; and two fixing assemblies, each of which comprises a driving part and a fixing part movably arranged in the positioning groove in the first direction, the driving part being drivingly connected with the fixing part to drive the fixing part to move in the first direction, the two fixing parts being oppositely arranged and used for abutting against two ends of the two tensile shafts away from the specimen block respectively so that the two tensile shafts clamp the specimen block.

2. The tensile test specimen preparation fixture of claim 1, wherein, Two side walls of the positioning groove in a second direction are tapered from top to bottom, the second direction intersecting the first direction.

3. The tensile test specimen preparation fixture of claim 2, wherein the first and second clamping members are configured to clamp the test specimen between the first and second clamping members such that the first and second clamping members contact the test specimen at the first and second contact points. The driving part and the fixing part are separately arranged; and / or A cross section of the fixing part is circular.

4. The tensile test specimen preparation fixture of claim 1, wherein, The driving part comprises a first threaded rod extending in the first direction, the first threaded rod being threadedly connected with the base, one end of the first threaded rod extending into the positioning groove and being drivingly connected with the fixing part to drive the fixing part to move in the first direction.

5. The tensile specimen preparation fixture of claim 4, wherein the first and second clamping members are configured to clamp the specimen between the first and second clamping members by moving the first and second clamping members toward each other. The other end of the first threaded rod is provided with a knob.

6. The tensile specimen preparation fixture of claim 1, wherein, The base and / or the fixing part are made of low-expansion material.

7. The tensile specimen preparation fixture of claim 1, wherein, A receiving groove is arranged at a bottom of the positioning groove. The tensile specimen preparation fixing clamp further comprises a supporting block detachably mounted in the receiving groove, the supporting block being used for supporting the specimen block.

8. The tensile test specimen preparation fixture of claim 7, wherein the first and second clamping members are configured to clamp the test specimen between the first and second clamping members. The receiving groove is in communication with a lower side of the base.

9. The tensile specimen preparation fixture of claim 1, wherein, The tensile specimen preparation fixing clamp further comprises at least two fastening assemblies, each of which comprises a fastening part movably arranged in the positioning groove in an up-down direction, the fastening part being used for abutting against an upper side of the tensile shaft.

10. The tensile specimen preparation fixture of claim 9, wherein the first and second clamping members are configured to clamp the specimen between the first and second clamping members by engaging the first and second clamping members with the first and second clamping surfaces, respectively. The fastening assembly further comprises: a fixing plate fixedly mounted on the upper side of the base; and a second threaded rod extending in the up-down direction, a lower end of the second threaded rod extending into the positioning groove and being connected with the fastening part.

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