Centering device for tensile test

Abstract

The utility model belongs to the field of testing the strength characteristic of a solid material by using mechanical stress, and particularly relates to a centering device for a tensile test. The utility model provides a centering device for a tensile test, which aims to solve the technical problem that the accuracy of a test result is relatively low due to the fact that tensile forces applied by a tensile machine to a clamping device for clamping a test piece are not on the same straight line in the prior art. The device comprises a bottom plate, a first movable part movably connected to the bottom plate and a second movable part movably connected to the first movable part, and one of the side, away from the second movable part, of the bottom plate and the side, away from the bottom plate, of the second movable part is provided with a first connecting part used for being connected with a clamping device. A second connecting part used for being connected with a tensile machine is arranged on the other one, and the first movable part and the second movable part are perpendicular to each other relative to the moving direction of the bottom plate and perpendicular to the stretching direction. The tensile force of the tensile machine can be located on the same straight line through the first movable part and the second movable part, and the test precision is improved.

Description

Technical Field

[0001] The utility model belongs to the field of testing the strength characteristics of solid materials by using mechanical stress, in particular to a centering device for tensile testing. Background Art

[0002] When conducting tensile shear strength tests on sealants, a tensile testing machine is required. The tensile testing machine includes a tensile device and a clamping device for clamping the test piece. Figure 1 As shown, the test piece includes two test plates 31 and a test adhesive 32 connected between the two test plates 31. However, due to the presence of the test adhesive 32 and the certain thickness of the test plate 31, the clamping device will be offset in the horizontal plane after clamping the test plate 31, which will cause the tensile force applied by the tensile machine to the clamping device after clamping the test piece to be not on the same straight line (for example, Figure 1 The two pulling forces are no longer on the same straight line. P ), which ultimately affects the test effect and makes the test result less accurate. Therefore, it is necessary to adjust the position of the clamping device. Utility Model Content

[0003] The utility model aims to provide a centering device for tensile testing, so as to solve the technical problem that the tensile force applied by the clamping device of the tensile testing machine to the clamped test piece is not on the same straight line in the prior art, resulting in low accuracy of the test result.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the centering device for tensile test provided by the utility model is:

[0005] A centering device for tensile testing comprises a base plate, a first movable part movably connected to the base plate and a second movable part movably connected to the first movable part, a first connecting part for connecting to a clamping device is provided on one of a side of the base plate away from the second movable part and a side of the second movable part away from the base plate, and a second connecting part for connecting to a tensile machine is provided on the other, the movable directions of the first movable part and the second movable part relative to the base plate are perpendicular to each other and perpendicular to the tensile direction; the first movable part is provided with a first locking structure, and the second movable part is provided with a second locking structure.

[0006] The beneficial effects are as follows: the utility model is a pioneering invention. Through the first connecting part and the second connecting part, the centering device for tensile test can be connected between the tensile device and the clamping device used to apply tensile force in the tensile machine; through the first movable part and the second movable part whose movable directions are perpendicular to each other and perpendicular to the tensile direction, the relative positions between different connecting parts can be adjusted, thereby eliminating the offset of the clamping device in any direction in the same horizontal plane; through the first locking structure and the second locking structure, the clamping device can be fixed after eliminating the offset of the clamping device, thereby avoiding the clamping device from moving during the tensile test, resulting in the failure of the tensile test. When in use, the centering device for tensile test is first installed between the tensile device and the clamping device through the connecting part; then, the clamping device clamps the piece to be tested, and the position of the first movable part and the second movable part relative to the bottom plate is adjusted to adjust the relative position of the projection of the tensile device and the clamping device in the same horizontal plane, so that the tensile force applied by the tensile machine is located on the same straight line to eliminate the offset of the clamping device; finally, the relative position of the clamping device and the tensile device is locked by using the first locking structure and the second locking structure, and the tensile machine is turned on to perform the tensile test. Since the utility model can eliminate the deviation of the clamping device in any direction in the same horizontal plane through the first movable part and the second movable part whose movable directions are perpendicular to each other and perpendicular to the stretching direction, the accuracy of the test result can be improved after adopting the centering device for tensile test in the utility model.

[0007] Furthermore, the bottom plate, the first movable part and the second movable part are slidably matched to form a cross slide mechanism.

[0008] The beneficial effect is that the bottom plate, the first movable part and the second sliding part are slidably matched to form a cross slide, the technology is mature and the structure is simple and reliable.

[0009] Furthermore, the first movable part and / or the second movable part is threadedly connected with an adjusting stud for driving the movement thereof, and the adjusting stud is provided with a fixed support body and is rotationally connected to the corresponding fixed support body and is axially anti-movement matched.

[0010] The beneficial effect is: compared with the technical solution of manually moving the first movable part and the second movable part, the adjusting stud and the fixed support body are rotatably connected and axially anti-movement cooperated, which can ensure that the relative position of the adjusting stud and the fixed support body in the axial direction of the adjusting stud does not change; and because the adjusting stud is threadedly connected to the first movable part and / or the second movable part, when the adjusting stud rotates, the distance between the corresponding fixed support body and the corresponding movable part will change, so that the adjusting stud can continuously and finely adjust the position of the first movable part and / or the second movable part, and conveniently eliminate the offset of the clamping device.

[0011] Furthermore, the first movable part and / or the second movable part is rotatably connected with an adjusting stud and cooperates with the adjusting stud in the axial direction to prevent movement. The adjusting stud is configured with a fixed support body and cooperates with the corresponding fixed support body thread.

[0012] The beneficial effect is: compared with the technical solution of manually moving the first movable part and the second movable part, the adjusting stud and the first movable part and / or the second movable part are rotatably connected and axially anti-movement cooperated, which can ensure that the relative position of the adjusting stud and the corresponding movable part in the axial direction of the adjusting stud does not change; and because the adjusting stud is threadedly connected to the corresponding fixed support body, when the adjusting stud rotates, the distance between the corresponding fixed support body and the corresponding movable part will change, so that the adjusting stud can continuously and finely adjust the position of the first movable part and / or the second movable part, and conveniently eliminate the offset of the clamping device.

[0013] Furthermore, the bottom plate is connected with a shield, which is arranged outside the first movable part and the second movable part, and an escape hole for escaping the adjusting screw is provided on the shield.

[0014] The beneficial effects are: the shield can protect the bottom plate, the first movable part and the second movable part from damage, and the avoidance holes are arranged on the shield to avoid interference between the shield and the adjustment studs, making it convenient to adjust the position of the clamping device through the adjustment studs from outside the shield.

[0015] Furthermore, the first movable part and the second movable part are both connected to the adjusting stud, and the fixed support body corresponding to the adjusting stud on one of the first movable part and the second movable part is arranged on the other to form a follow-up support body, and a pointer is arranged on the follow-up support body or its corresponding movable part, and an indicating scale corresponding to the pointer is arranged on the protective cover.

[0016] The beneficial effect is that the relative positions of the projections of the clamping device and the stretching device in the same horizontal plane can be conveniently judged by means of the pointer arranged on the follower support body or its corresponding movable part and the indicating scale on the shield.

[0017] Furthermore, a handle is installed on the adjusting stud.

[0018] The beneficial effect is that the stud can be conveniently adjusted by turning the knob through the handle, thereby conveniently adjusting the position of the clamping device and conveniently eliminating the deviation of the clamping device.

[0019] Furthermore, one end of the adjusting screw is rotatably equipped with a blocking piece, and the blocking piece is fixedly connected to the corresponding movable part.

[0020] The beneficial effect is: compared with the technical solution without a baffle, the adjusting stud is connected to the baffle, and the baffle is further connected to the movable part. At this time, the baffle is equivalent to the stud head of the adjusting stud, thereby increasing the force-bearing area of ​​the movable part, so that the adjusting stud can better indirectly drive the movable part to move.

[0021] Furthermore, the first movable part includes a first connecting block movably connected to the bottom plate and a first supporting plate movably connected to the second movable part, and the first supporting plate and the first connecting block are fixedly connected.

[0022] The beneficial effect is: by setting the first movable part as a split structure, it is easy to process. Compared with the movable part of the one-piece "T"-shaped structure, the two separate rectangular connecting blocks and support plates are more convenient to process, the raw material utilization rate is also high, which is conducive to cost saving.

[0023] Furthermore, the second movable part includes a second connecting block movably connected to the first movable part and a second supporting plate connected to the second connecting part, and the second supporting plate is fixedly connected to the second connecting block.

[0024] The beneficial effect is: by setting the second movable part as a split structure, it is easy to process. Compared with the movable part of the one-piece "T"-shaped structure, the two separate rectangular connecting blocks and support plates are more convenient to process, the raw material utilization rate is also high, which is conducive to cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of a test piece in the prior art when a tensile test is performed;

[0026] Figure 2 It is a top view of the centering device for tensile testing of the utility model;

[0027] Figure 3 It is a side view of the centering device for tensile testing of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the centering device for tensile testing of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the centering device for tensile testing of the utility model when the protective cover is omitted.

[0030] Description of reference numerals:

[0031] 1. First adjusting stud; 2. Second adjusting stud; 3. Protective cover; 4. Second pointer; 5. First pointer; 6. First fixing plate; 7. First baffle; 8. Second fixing plate; 9. Second baffle; 10. Indicator scale; 11. Avoidance long hole; 12. First slide rail; 13. First connecting part; 14. Bottom plate; 15. First connecting block; 16. First supporting plate; 17. Second slide rail; 18. Second supporting plate; 19. Second connecting part; 31. Test plate; 32. Glue to be tested. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the embodiments.

[0033] Specific embodiment 1 of the centering device for tensile testing provided by the utility model:

[0034] The purpose of this embodiment is to provide a centering device for a tensile test that can eliminate the offset of a clamping device in any direction.

[0035] like Figure 2-5 As shown, the specific implementation mode 1 of this embodiment specifically provides a centering device for tensile testing, including a base plate 14, a first movable part movably connected to the base plate 14, and a second movable part movably connected to the first movable part, a first connecting part 13 for connecting to a clamping device is provided on one of a side of the base plate 14 away from the second movable part and a side of the second movable part away from the base plate 14, and a second connecting part 19 for connecting to a tensile testing machine is provided on the other, and the movable directions of the first movable part and the second movable part relative to the base plate are perpendicular to each other and perpendicular to the tensile direction; the first movable part is provided with a first locking structure, and the second movable part is provided with a second locking structure to fix the position of the clamping device after eliminating the offset of the clamping device.

[0036] The centering device for tensile testing can be connected between the tensile device and the clamping device for applying tensile force in the tensile testing machine through the first connecting part 13 and the second connecting part 19; the relative positions between different connecting parts can be adjusted through the first movable part and the second movable part whose movable directions are perpendicular to each other and to the tensile direction, thereby eliminating the displacement of the clamping device in any direction within the same horizontal plane; the clamping device can be fixed after the displacement of the clamping device is eliminated through the first locking structure and the second locking structure, thereby preventing the clamping device from moving during the tensile test and causing the failure of the tensile test.

[0037] When in use, first install the tensile test centering device between the stretching device and the clamping device through the connecting part; then, make the clamping device clamp the piece to be tested, adjust the position of the first movable part and the second movable part relative to the bottom plate 14, so as to adjust the relative position of the projections of the stretching device and the clamping device in the same horizontal plane, so that the tensile force applied by the tensile machine is located on the same straight line, so as to eliminate the offset of the clamping device; finally, use the first locking structure and the second locking structure to lock the first movable part and the second movable part, and then lock the relative position of the clamping device and the stretching device, turn on the tensile machine, and perform the tensile test. Since the utility model can eliminate the offset of the clamping device in any direction in the same horizontal plane through the first movable part and the second movable part whose movable directions are perpendicular to each other and perpendicular to the stretching direction, the use of the tensile test centering device in the utility model can improve the accuracy of the test results.

[0038] Specifically, in the embodiment 1, the bottom plate 14, the first movable part and the second movable part are slidably matched to form a cross slide. Figure 2-5 As shown, a first slide rail 12 is provided on one side of the bottom plate 14 close to the first movable part, a first slide groove corresponding to the first slide rail 12 is provided on one side of the first movable part, a second slide rail 17 is provided on the other side of the first movable part, a second slide groove corresponding to the second slide rail 17 is provided on the second movable part, the second slide groove and the connecting part are respectively located on two opposite sides of the second movable part, and the extension directions of the first slide rail 12 and the second slide rail 17 are perpendicular to each other, so that the movement directions of the first movable part and the second movable part are perpendicular to each other and are perpendicular to the stretching direction. The bottom plate 14, the first movable part and the second sliding part are slidably matched to form a cross slide, which has mature technology, simple structure and convenient processing.

[0039] Of course, in other specific embodiments, the positions of the slide rails and the slide grooves can also be interchanged, that is: a first slide groove is provided on one side of the bottom plate 14 close to the first movable part, a first slide rail 12 corresponding to the first slide groove is provided on one side of the first movable part, a second slide groove is provided on the other side of the first movable part, and a second slide rail 17 corresponding to the second slide groove is provided on the second movable part, the second slide rail 17 and the connecting part are respectively arranged on two opposite sides of the second movable part, and the extension directions of the first slide rail 12 and the second slide rail 17 are perpendicular to each other, so that the moving directions of the first movable part and the second movable part are perpendicular to each other and are both perpendicular to the stretching direction.

[0040] Of course, in other specific implementations, a first slide groove may be provided on one side of the bottom plate 14 close to the first movable part, and a first slider corresponding to the first slide groove may be provided on one side of the first movable part. The first slider can move along the slide groove to realize the movement of the first movable part. The number of the first sliders can be one, two or more, as long as the slider can move along the slide groove to realize the movement of the first movable part.

[0041] In other embodiments, dovetail grooves may be provided on the first movable part and the second movable part, and corresponding rollers may be provided on the corresponding base plate 14 and the first movable part to achieve movable connection between the base plate 14, the first movable part and the second movable part by rolling cooperation.

[0042] In other specific embodiments, the specific activity modes of the first movable part and the second movable part may be the same or different. For example, the first movable part and the base plate 14 are slidably matched through slide rails and slide grooves, and the second movable part and the first movable part are rolling matched through dovetail grooves and rollers.

[0043] In order to facilitate the control of the first movable part and the second movable part, in the specific implementation mode 2 of this embodiment, as shown in FIG. Figure 2-5 As shown, based on the specific implementation mode 1 of this embodiment, the first movable part and / or the second movable part is threadedly connected with an adjusting stud for driving the first movable part to move, and the adjusting stud is provided with a fixed support body and is rotatably connected to the corresponding fixed support body and cooperates to prevent axial movement. Specifically, in this specific implementation mode, the fixed support body is a fixed plate, but in other specific implementation modes, the fixed support body can also be a fixed block or other structure, as long as it can be rotatably connected to the corresponding adjusting stud and cooperate to prevent axial movement.

[0044] like Figure 2-5 As shown, in the specific embodiment 2, the bottom plate 14 is connected to the first fixing plate 6, the first adjusting stud 1 is rotatably connected to the first fixing plate 6, the first fixing plate 6 and the first adjusting stud 1 are anti-movement matched in the axial direction of the first adjusting stud 1, and one end of the first adjusting stud 1 is threadedly connected to the first movable part so that the first adjusting stud 1 can control the movement of the first movable part. And / or, the first movable part is connected to the second fixing plate 8, the second adjusting stud 2 is rotatably connected to the second fixing plate 8, the second fixing plate 8 and the second adjusting stud 2 are anti-movement matched in the axial direction of the second adjusting stud 2, and one end of the second adjusting stud 2 is threadedly connected to the second movable part so that the second adjusting stud 2 can control the movement of the second movable part.

[0045] Regarding the specific method of preventing movement, in the present embodiment 2, a groove can be provided on the first fixing plate 6, and a protrusion can be provided on the first adjusting stud 1, and the protrusion on the first adjusting stud 1 can be forcibly installed in the groove to achieve the stop fit between the first fixing plate 6 and the first adjusting stud 1 in the axial direction of the first adjusting stud 1, thereby achieving the anti-movement fit between the first adjusting stud 1 and the first fixing plate 6; or, a thrust bearing can be directly provided on the first fixing plate 6, and a part of the first adjusting stud 1 can be provided in the thrust bearing as a rotating shaft to achieve the anti-movement fit between the first adjusting stud 1 and the first fixing plate 6; of course, other anti-movement methods in the prior art can also be adopted. In other specific embodiments, the second fixing plate 8 can also be provided on the bottom plate 14, and the second fixing plate 8 is provided with a long hole along the moving direction of the first movable part, and the second adjusting stud 2 can slide along the long hole to cooperate with the movement of the first movable part.

[0046] Compared with the technical solution of manually moving the first movable part and the second movable part, the adjusting stud and the fixed support body are rotatably connected and axially anti-movement cooperated, which can ensure that the relative positions of the adjusting stud and the fixed support body in the axial direction of the adjusting stud do not change; and because the adjusting stud is threadedly connected to the first movable part and / or the second movable part, when the adjusting stud rotates, the distance between the corresponding fixed support body and the corresponding movable part will change, so that the adjusting stud can continuously and finely adjust the position of the first movable part and / or the second movable part, and conveniently eliminate the offset of the clamping device.

[0047] In other specific embodiments, only the first adjusting screw 1 or the second adjusting screw 2 may be provided, and one of the first movable part and the second movable part is adjusted directly by hand, and the other is adjusted by the adjusting screw.

[0048] In other specific embodiments, the adjusting stud may not be provided, and an adjusting rod may be provided on at least one side of the first movable part and the second movable part. The adjusting rod is fixedly connected to the movable part or formed integrally with the movable part. The movement of the movable part can be conveniently controlled by pushing the adjusting rod, thereby conveniently eliminating the offset of the clamping device.

[0049] In order to conveniently control the movement of the active part by adjusting the stud, such as Figure 2-5 As shown, in specific implementation 3 of the present embodiment, on the basis of specific implementation 1, the first movable part and / or the second movable part is rotatably connected with an adjusting stud and cooperates with the adjusting stud in the axial direction to prevent movement, and the adjusting stud is configured with a fixed support body and cooperates with the corresponding fixed support body thread.

[0050] Specifically, in the present specific embodiment 3, a first threaded hole is provided on the first fixing plate 6, a first mushroom head is provided at one end of the first adjusting stud 1, a first groove corresponding to the first mushroom head is provided on the first movable part, the first mushroom head and the first groove cooperate with each other to realize the anti-movement cooperation between the first movable part and the first adjusting bolt 1 in the axial direction of the first adjusting stud 1, and the first adjusting stud 1, the first threaded hole, the first mushroom head and the first groove together constitute a first locking structure; and / or, a second threaded hole is provided on the second fixing plate 8, a second mushroom head is provided at one end of the second adjusting stud 2, and a second groove corresponding to the second mushroom head is provided on the second movable part, the second mushroom head and the second groove cooperate with each other to realize the anti-movement cooperation between the second movable part and the second adjusting bolt 2 in the axial direction of the second adjusting stud 2, and the second adjusting stud 2, the second threaded hole, the second mushroom head and the second groove together constitute a second locking structure.

[0051] By providing the first threaded hole and the first adjusting stud 1 on the first fixing plate 6, the position of the first adjusting stud 1 can be locked when the first adjusting stud 1 is not rotated. Since a first mushroom head is provided at one end of the first adjusting stud 1, after the first mushroom head extends into the first groove on the corresponding first movable part, the first adjusting screw 1 and the first movable part always move synchronously in the movable direction of the first movable part. Therefore, when the adjusting stud rotates, the distance between the corresponding fixed support body and the corresponding movable part will change, so that the adjusting stud can continuously and finely adjust the position of the first movable part and / or the second movable part, and conveniently eliminate the offset of the clamping device; when the adjusting stud does not rotate, the corresponding threaded hole, adjusting stud, mushroom head and groove can lock the position of the corresponding movable part.

[0052] Of course, in other specific embodiments, as long as the first adjusting stud 1 can be rotated and matched with the first movable part, and the first adjusting stud 1 and the first movable part stop and match in the movable direction of the first movable part, so that the first adjusting stud 1 can control the movement of the first movable part. Specifically, a stopper is provided at one end of the first adjusting stud 1 close to the first movable part, and the threaded hole on the first movable part is changed to a stopper groove that stops and matches with the stopper in the movable direction of the first movable part, and the stopper and the stopper groove rotate and match, and the first adjusting stud 1, the first threaded hole, the stopper and the stopper groove constitute a first locking structure. For example, the stopper is an "L"-shaped structure or a "T"-shaped structure, the stopper groove is a circular groove, and a stopper plate is provided at the notch, the inner diameter of the stopper plate is slightly smaller than the maximum outer diameter of the stopper to prevent the stopper from coming out of the stopper groove, and the stopper is inserted into the stopper groove and can rotate in the stopper groove. Similarly, the structure of the second adjusting stud 2 and the second movable part can also refer to the structure of the first adjusting stud 1 and the first movable part. Of course, in other specific implementations, the stop portion at the end of the adjusting stud may be changed to a stop groove, and correspondingly, the stop groove on the movable portion may be changed to the stop portion.

[0053] In order to conveniently control the adjustment studs, such as Figure 2-5 As shown, in the specific implementation 4 of the present embodiment, on the basis of the specific implementation 2 or 3, a handle is installed on the adjusting stud. Specifically, the first adjusting stud 1 further includes a first handle, and the first handle and the first movable part are arranged on both sides of the first fixing plate 6; and / or, the second adjusting stud 2 further includes a second handle, and the second handle and the second movable part are arranged on both sides of the second fixing plate 8. The handle can be used to conveniently turn the knob to adjust the stud, thereby conveniently adjusting the position of the clamping device to conveniently eliminate the offset of the clamping device.

[0054] In order to better control the movement of the movable part, in the specific implementation mode 5 of this embodiment, one end of the adjusting stud is rotatably equipped with a baffle, and the baffle is fixedly connected to the corresponding movable part. Specifically, the first adjusting stud 1 is indirectly connected to the first movable part through the first baffle 7; and / or the second adjusting stud 2 is indirectly connected to the second movable part through the second baffle 9.

[0055] Compared with the technical solution without a baffle, the adjusting stud is connected to the baffle, which is in turn connected to the movable part. At this time, the baffle is equivalent to the stud head of the adjusting stud, thereby increasing the force-bearing area of ​​the movable part and enabling the adjusting stud to better indirectly drive the movable part to move.

[0056] Specific embodiment 2 of the centering device for tensile testing provided by the utility model:

[0057] The purpose of this embodiment is to provide a centering device for tensile testing provided with a protective cover.

[0058] like Figure 2-5 As shown, in the specific implementation 1 of this embodiment, on the basis of any one of the specific implementations 2-5 of the specific implementation 1 of the utility model, the bottom plate is connected to a shield, the shield is arranged outside the first movable part and the second movable part, and a circumvention hole for circumventing the adjusting stud is provided on the shield. Specifically, as Figure 2-5 As shown, the centering device for tensile test includes a first adjusting stud 1 and a second adjusting stud 2. The centering device for tensile test also includes a shield 3 which is arranged on the base plate 14, the first movable part and the second movable part. The shield 3 is provided with a short avoidance hole for avoiding the first adjusting stud 1 and a long avoidance hole 11 for avoiding the second adjusting stud 2. One end of the first adjusting stud 1 extends out of the short avoidance hole, and one end of the second adjusting stud 2 extends out of the long avoidance hole 11.

[0059] The shield 3 can protect the base plate 14, the first movable part and the second movable part from damage. An avoidance hole is provided on the shield 3 to avoid interference between the shield 3 and the first adjusting stud 1 or the second adjusting stud 2, making it convenient to adjust the position of the clamping device through the adjusting stud from outside the shield 3.

[0060] Of course, in other specific implementations, only one adjusting screw may be provided to control one movable part, and the control mechanism of the other movable part may adopt the adjusting rod mentioned in specific embodiment 1 of the utility model, and an avoidance hole corresponding to the adjusting rod may be provided on the shield.

[0061] In order to conveniently determine the relative positions of the clamping device and the stretching device respectively connected to the connecting part, as shown in FIG. Figure 2-5 As shown, in the specific implementation 2 of the present embodiment, on the basis of the specific implementation 1 of the present embodiment, the first movable part and the second movable part are both connected with an adjusting stud, and the fixed support body corresponding to the adjusting stud on one of the first movable part and the second movable part is arranged on the other to form a follow-up support body, and a pointer is arranged on the follow-up support body or the corresponding movable part, and an indicating scale 10 corresponding to the pointer is arranged on the shield 3. In the specific implementation 2, the second fixed plate 8 corresponding to the second adjusting bolt 2 is the follow-up support body, the second fixed plate 8 is arranged on the first movable part, the first pointer 5 is arranged on the second movable part, and the second pointer 4 is arranged on the second fixed plate 8. However, in other specific implementations, the first fixed plate 6 corresponding to the first adjusting bolt 1 is the follow-up support body, the first fixed plate 6 is arranged on the second movable part, and the second fixed plate 8 is arranged on the bottom plate.

[0062] The relative positions of the projections of the clamping device and the stretching device in the same horizontal plane can be conveniently determined by the indicating scale 10 and the pointer.

[0063] Specific embodiment 3 of the centering device for tensile testing provided by the utility model:

[0064] The purpose of this embodiment is to provide different movable parts.

[0065] In order to facilitate the processing and manufacturing activities, such as Figure 2-5As shown, in the specific implementation 1 of the present embodiment, based on any specific implementation of the specific implementation 1 or 2 of the utility model, the first movable part is a split structure, the first movable part includes a first connecting block 15 movably connected to the bottom plate 14 and a first supporting plate 16 movably connected to the second movable part, and the first supporting plate 16 and the first connecting block 15 are fixedly connected; and / or, the second movable part is a split structure, the second movable part includes a second connecting block movably connected to the first movable part and a second supporting plate 18 connected to the connecting part, and the second supporting plate 18 and the second connecting block are fixedly connected. Of course, in other embodiments, the movable part can also be integrally processed and formed.

[0066] By setting the movable part as a split structure, it is easy to process. Compared with the movable part with an integral "T"-shaped structure, the two separate rectangular connecting blocks and support plates are more convenient to process, have a high raw material utilization rate, and are conducive to cost saving.

[0067] In order to conveniently fix the connection block and the support plate, in the specific implementation 2 of the present embodiment, on the basis of the specific implementation 1 of the present embodiment, the first support plate 16 and the first connection block 15 are fixedly connected by bolts; and / or the second support plate 18 and the second connection block are fixedly connected by bolts. The support plate and the connection block can be conveniently fixedly connected by bolts, and the structure is simple and the installation is convenient.

[0068] Of course, in other embodiments, the connection block and the support plate may be fixedly connected by welding, plugging, mortise and tenon connection, etc.

[0069] Finally, it should be noted that the above are only preferred embodiments of the utility model and are not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A centering device for a tensile test, characterized in that: It includes a base plate, a first movable part movably connected to the base plate and a second movable part movably connected to the first movable part. A first connecting part for connecting to a clamping device is provided on one of a side of the base plate away from the second movable part and a side of the second movable part away from the base plate, and a second connecting part for connecting to a tensile testing machine is provided on the other. The movable directions of the first movable part and the second movable part relative to the base plate are perpendicular to each other and perpendicular to the stretching direction. The first movable part is provided with a first locking structure, and the second movable part is provided with a second locking structure.

2. The centering device for tensile testing according to claim 1, characterized in that: The bottom plate, the first movable part and the second movable part are slidably matched to form a cross slide mechanism.

3. The centering device for tensile testing according to claim 1, characterized in that: The first movable part and / or the second movable part is threadedly connected with an adjusting stud for driving the first movable part to move. The adjusting stud is provided with a fixed support body and is rotatably connected to the corresponding fixed support body and is axially anti-movement matched.

4. The centering device for tensile testing according to claim 1, characterized in that: The first movable part and / or the second movable part is rotatably connected with an adjusting stud and cooperates with the adjusting stud in the axial direction to prevent movement. The adjusting stud is configured with a fixed support body and cooperates with the corresponding fixed support body thread.

5. The centering device for tensile testing according to claim 3 or 4, characterized in that: The bottom plate is connected with a shield, which is arranged outside the first movable part and the second movable part, and an escape hole for escaping the adjusting screw is arranged on the shield.

6. The centering device for tensile testing according to claim 5, characterized in that: The first movable part and the second movable part are both connected to the adjusting stud, and the fixed support body corresponding to the adjusting stud on one of the first movable part and the second movable part is arranged on the other to form a follow-up support body, and a pointer is arranged on the follow-up support body or its corresponding movable part, and an indicating scale corresponding to the pointer is arranged on the protective cover.

7. The centering device for tensile testing according to claim 3 or 4, characterized in that: A handle is installed on the adjusting stud.

8. The centering device for tensile testing according to claim 4, characterized in that: One end of the adjusting screw is rotatably mounted with a blocking piece, and the blocking piece is fixedly connected to the corresponding movable part.

9. The centering device for tensile testing according to claim 1 or 2, characterized in that: The first movable part comprises a first connecting block movably connected to the bottom plate and a first supporting plate movably connected to the second movable part, and the first supporting plate and the first connecting block are fixedly connected.

10. The centering device for tensile testing according to claim 1 or 2, characterized in that: The second movable part includes a second connecting block movably connected to the first movable part and a second supporting plate connected to the second connecting part, and the second supporting plate is fixedly connected to the second connecting block.

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