CN217237481U - Tensile test's test piece anchor clamps - Google Patents
Tensile test's test piece anchor clamps Download PDFInfo
- Publication number
- CN217237481U CN217237481U CN202220503801.XU CN202220503801U CN217237481U CN 217237481 U CN217237481 U CN 217237481U CN 202220503801 U CN202220503801 U CN 202220503801U CN 217237481 U CN217237481 U CN 217237481U
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- China
- Prior art keywords
- sliding blocks
- cavity
- tensile test
- jaw
- specimen holder
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- 238000012360 testing method Methods 0.000 title claims abstract description 19
- 238000009864 tensile test Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a reinforcing bar check out test set field specifically discloses a tensile test's test piece anchor clamps, including keeping silent base, a pair of slider, a pair of housing screw, the inside of keeping silent the base is provided with the narrow inboard wide cavity of opening, and two sliders are in the cavity, and two sliders are stretched out each other under the guide of the guide rail that corresponds and are drawn close or withdrawal separation, and two sliders are used for centre gripping or release reinforcing bar, and housing screw passes withstand the bottom that corresponds the slider behind the base of keeping silent, and housing screw promotes the slider stretches out. When the sliding blocks move outwards, the two sliding blocks are close to each other due to the limit of the inclined planes. When two slider centre gripping reinforcing bars, during the reinforcing bar atress simultaneously, the pulling force can partly decompose the clamping-force that is on the horizontal direction, and the pulling force is big more, and clamping-force is big more, so realizes the auto-lock.
Description
Technical Field
The utility model belongs to reinforcing bar check out test set field, in particular to tensile test's test piece anchor clamps.
Background
The tensile testing machine is also a material tensile testing machine and a universal tensile strength testing machine, is a new generation of mechanical detection equipment integrating computer control, automatic measurement, data acquisition, screen display and test result processing, and clamps a mechanical steel bar connecting joint through a clamp on the tensile testing machine to perform tensile compression detection. The steel reinforcement is mainly subjected to tensile stress in the concrete. After the steel bar is produced, the tensile strength and the bending strength of the steel bar need to be checked randomly, and the steel bar can be put into use only after being checked to be qualified.
The prior art has the following problems that a clamp of a universal machine is a wedge-shaped clamp, and the clamp has the defect that the clamp is easy to slip when in detection because the thickness or the diameter of a material is too small to clamp in a tensile test. Still some adopt the mode of screw sleeve butt joint, fix the both ends at screw sleeve through the mode of screw-thread fit respectively with the both ends of twisted steel, and then realize tensile, its joint strength is also not enough.
The above background disclosure is only provided to aid understanding of the inventive concepts and solutions of the present invention, and it does not necessarily pertain to the prior art of this patent application, and it should not be used to assess the novelty and inventive aspects of this application without explicit evidence that such contents are disclosed at the filing date of this patent application.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a tensile test's that can auto-lock test piece anchor clamps.
In order to achieve the above object, the utility model provides a tensile test's test piece anchor clamps, include: the jaw structure comprises a jaw base, wherein a cavity is arranged inside the jaw base, the cavity is of an isosceles trapezoid structure with a narrow opening and a wide inner side, and slide rails are arranged on the inclined planes of the two opposite sides of the cavity. As shown in fig. 2, the jaw base extends along a direction perpendicular to the paper surface, and at this time, the outer contour of the jaw base is similar to a prismoid structure, the outer edge of the jaw base is provided with a rounded corner to avoid scraping of a user, and correspondingly, the inner edge of the jaw base is also provided with a rounded corner to avoid stress concentration. Based on the top, bottom, left and right directions in fig. 2, the upper end of the cavity represents the bottom side of the trapezoid, the lower end represents the top side of the trapezoid, and the left and right sides represent the waist of the trapezoid.
The test piece fixture further comprises a pair of slide blocks, the two slide rails are of a right trapezoid structure, the inclined surfaces of the slide blocks are connected with the inclined surfaces of the cavities, as shown in fig. 2, the two slide blocks extend along a square perpendicular to the paper surface to obtain the appearance of the slide blocks, and the appearance of the slide blocks is similar to a prismoid structure. When the inclined plane of the sliding block contacts and slides with the inner inclined plane of the jaw base, the right-angle edge of the sliding block needs to be ensured to be in a vertical state, and the inclined plane of the sliding block and the inner inclined plane of the jaw base have the same inclination angle. Furthermore, as the opening of the cavity is narrowed, the two sliding blocks extend out to be close to each other or retract to be separated from each other under the guidance of the corresponding guide rails respectively, and the two sliding blocks are used for clamping or releasing the reinforcing steel bars; by taking the upper and lower directions in fig. 2 as the standard, when the steel bar is pulled, the two slide blocks bear the acting force in the downward direction, and a part of the acting force is decomposed into the clamping force in the horizontal direction, so that the steel bar is further clamped to realize self-locking. The two sliding blocks are provided with anti-slip strips used for connecting reinforcing steel bars on the side faces close to each other, sawteeth are arranged on the anti-slip strips, and meanwhile one side of each anti-slip strip contacting with the reinforcing steel bar is set to be an arc face, so that the contact area between the anti-slip strips and the reinforcing steel bar is increased. Aiming at the reinforcing steel bars with different diameters, the anti-slip strip is in a larger radian, so that the anti-slip strip is downward compatible with other reinforcing steel bars.
The test piece clamp further comprises a pair of compression screws, the compression screws penetrate through the jaw base and then abut against the bottoms of the corresponding sliding blocks, the compression screws push the sliding blocks to extend out, and the two sliding blocks clamp the reinforcing steel bars together. When the device is used, the end part of the steel bar to be tested is inserted between the two sliding blocks, the sliding blocks are properly ejected out after the compression screw rotates, and the two sliding blocks start to clamp the steel bar; the same specimen holder was used to clamp the other end of the bar in the same manner. Finally, the hydraulic system drives the two specimen holders away from each other.
As an improvement of the scheme, an included angle between the inclined plane of the cavity and the horizontal direction is 70-80 degrees, the difference between the widest position and the narrowest position of the cavity is small, the cutter is convenient to mill, and meanwhile, the sliding block is convenient to move smoothly.
As an improvement of the scheme, the jaw base comprises two symmetrical petal structures, and the two petal structures are fixedly connected through a plurality of groups of bolts. As shown in fig. 2, it can be seen that the jaw base is provided with a plurality of straight holes, and a half of the jaw base can be obtained by stretching the jaw base in a direction perpendicular to the paper surface by a proper distance. Preferably, the jaw base is closed on all sides, i.e. the sides of the jaw base in fig. 2 are provided with closure plates for covering and for increasing the structural strength.
As an improvement of the above scheme, the compression screw is an outer hexagon bolt. By adopting the scheme, a user can conveniently rotate the compression screw from the side surface by a tool such as a wrench
As an improvement of the above scheme, as shown in fig. 2, the anti-slip strip is detachably connected with the slide block. The side of the slider is provided with a slot position, one side of the anti-slip strip close to the slider is provided with a bulge which can be embedded into the slot position, and the anti-slip strip and the bulge are connected in a matching way.
In other schemes, an integrally formed structure is arranged between the anti-slip strip and the sliding block. The saw teeth are then machined directly on the vertical edges of the slider.
As an improvement of the scheme, the jaw clamping device further comprises a support, a hydraulic push rod, a fixed seat, a movable seat and a controller, wherein the fixed seat and the movable seat are respectively arranged on the upper side and the lower side of the support, and the two jaw bases and parts thereof are respectively arranged on the fixed seat and the movable seat. The hydraulic system of supporting test piece anchor clamps is prior art, and the anchor clamps that this application mentioned can be used to different hydraulic system as required.
Compared with the prior art, the utility model discloses following beneficial effect has: when the sliding blocks move outwards, the two sliding blocks are close to each other due to the limit of the inclined planes. When two slider centre gripping reinforcing bars, during the reinforcing bar atress simultaneously, the pulling force can partly decompose the clamping-force that is on the horizontal direction, and the pulling force is big more, and clamping-force is big more, so realizes the auto-lock.
Drawings
FIG. 1 is a perspective view of a specimen holder and associated equipment according to an embodiment;
FIG. 2 is a cross-sectional view of a specimen holder under one embodiment.
The main reference numbers indicate: 11. a jaw base; 12. a slider; 13. anti-slip strips; 14. a compression screw; 21. a fixed seat; 22. a movable seat; 23. and a controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inner side", "outer side", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. The terms "first", "second" and "third", if any, are used for descriptive purposes only and for distinguishing between technical features and are not to be construed as indicating or implying relative importance or implying a number of indicated technical features or a precedence of indicated technical features.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "disposed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The following describes an embodiment of the present invention according to its overall structure.
Referring to fig. 1 and 2, the utility model discloses a tensile test's test piece anchor clamps, include: the jaw structure comprises a jaw base 11, wherein a cavity is arranged inside the jaw base 11, the cavity is of an isosceles trapezoid structure with a narrow opening and a wide inner side, and slide rails are arranged on inclined planes of two opposite sides of the cavity. As shown in fig. 2, the jaw base 11 extends in a direction perpendicular to the paper surface, in this case, the outer contour of the jaw base 11 is similar to a frustum pyramid structure, the outer edge of the jaw base 11 is provided with a rounded corner to avoid scraping by a user, and correspondingly, the inner edge of the jaw base 11 is also provided with a rounded corner to avoid stress concentration. Based on the top, bottom, left and right directions in fig. 2, the upper end of the cavity represents the bottom side of the trapezoid, the lower end represents the top side of the trapezoid, and the left and right sides represent the waist of the trapezoid.
The test piece fixture further comprises a pair of slide blocks 12, the two slide rails are of a right trapezoid structure, the inclined surfaces of the slide blocks 12 are connected with the inclined surfaces of the cavities, as shown in fig. 2, the two slide blocks 12 extend along a square perpendicular to the paper surface to obtain the appearance of the slide blocks, and the appearance of the slide blocks 12 is similar to a frustum pyramid structure. When the inclined plane of the slide block 12 contacts and slides with the inner inclined plane of the jaw base 11, it is necessary to ensure that the right-angle edge of the slide block 12 is kept in a vertical state, and it can be understood that the inclined plane of the slide block 12 has the same inclination angle as the inner inclined plane of the jaw base 11. Further, as the opening of the cavity is narrowed, the two sliding blocks 12 respectively extend to close to each other or retract to separate from each other under the guidance of the corresponding guide rails, and the two sliding blocks 12 are used for clamping or releasing the reinforcing steel bars; based on the up-down direction in fig. 2, when the steel bar is pulled, the two sliding blocks 12 bear downward acting force, and a part of the acting force is decomposed into a clamping force in the horizontal direction, so that the steel bar is further clamped to realize self-locking. The two sliding blocks 12 are respectively provided with an anti-slip strip 13 used for connecting reinforcing steel bars on the side surfaces close to each other, the anti-slip strips 13 are provided with saw teeth, and meanwhile, one side of each anti-slip strip 13 contacting with the reinforcing steel bars is provided with an arc surface, so that the contact area between each anti-slip strip 13 and the reinforcing steel bars is increased. For reinforcing steel bars with different diameters, the anti-slip strips 13 are made of steel bars with a large radian, so that the anti-slip strips are downward compatible with other reinforcing steel bars.
The test piece clamp further comprises a pair of compression screws 14, the compression screws 14 penetrate through the jaw base 11 and then abut against the bottoms of the corresponding slide blocks 12, the compression screws 14 push the slide blocks 12 to extend out, and the two slide blocks 12 clamp the reinforcing steel bars together. When in use, the end part of the steel bar to be tested is inserted between the two sliding blocks 12, the compression screw 14 is rotated to eject the sliding blocks 12 properly, and the two sliding blocks 12 start to clamp the steel bar; the same specimen holder was used to clamp the other end of the bar in the same manner. Finally, the hydraulic system drives the two specimen holders away from each other.
As an improvement of the scheme, an included angle between the inclined plane of the cavity and the horizontal direction is 70-80 degrees, the difference between the widest position and the narrowest position of the cavity is small, the cutter is convenient to mill, and meanwhile, the sliding block 12 can move smoothly.
As an improvement of the scheme, the jaw base 11 comprises two symmetrical petal structures, and the two petal structures are connected and fixed through a plurality of groups of bolts. As shown in fig. 2, it can be seen that the jaw base 11 is provided with a plurality of straight holes, and a half of the jaw base 11 can be obtained by stretching the jaw base in a direction perpendicular to the paper surface by a proper distance. Preferably, the jaw base 11 is closed on all sides, i.e. the sides of the jaw base 11 in fig. 2 are provided with sealing plates for covering and for increasing the structural strength.
As a modification of the above scheme, the compression screw 14 is an outer hexagon bolt. With the above arrangement, it is convenient for the user to rotate the compression screw 14 from the side by a tool such as a wrench
As a modification of the above solution, as shown in fig. 2, the anti-skid strip 13 is detachably connected with the sliding block 12. The side of the slider 12 is provided with a slot, and one side of the anti-slip strip 13 close to the slider 12 is provided with a bulge which can be embedded into the slot, and the two are connected in a matching way.
In other schemes, the anti-skid strip 13 and the sliding block 12 are integrally formed. The serrations are now machined directly into the vertical edges of the slider 12.
As an improvement of the above scheme, the jaw clamping device further comprises a support, a hydraulic push rod, a fixed seat 21, a movable seat 22 and a controller 23, wherein the fixed seat 21 and the movable seat 22 are respectively placed on the upper side and the lower side of the support, and the two jaw bases 11 and parts thereof are respectively installed on the fixed seat 21 and the movable seat 22. The hydraulic system who supports test piece anchor clamps is prior art, and the anchor clamps that this application was mentioned can be applied to different hydraulic systems as required.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (7)
1. The utility model provides a tensile test's test piece anchor clamps which characterized in that includes:
the jaw structure comprises a jaw base, wherein a cavity is arranged inside the jaw base, the cavity is in an isosceles trapezoid structure with a narrow opening and a wide inner side, and slide rails are arranged on inclined planes at two opposite sides of the cavity;
the two sliding blocks extend out of each other to be close to each other or retract to be separated from each other under the guidance of the corresponding guide rails respectively, the two sliding blocks are used for clamping or releasing the steel bars, anti-slip strips used for connecting the steel bars are arranged on the side surfaces, close to each other, of the two sliding blocks, and sawteeth are arranged on the anti-slip strips;
the compression screws penetrate through the jaw base and then prop against the bottoms of the corresponding sliding blocks, the compression screws push the sliding blocks to extend out, and the two sliding blocks clamp the reinforcing steel bars together.
2. The specimen holder for the tensile test according to claim 1, characterized in that: the included angle between the inclined plane of the cavity and the horizontal direction is 70-80 degrees.
3. The specimen holder for the tensile test according to claim 2, characterized in that: the jaw base comprises two symmetrical petal structures, and the two petal structures are fixedly connected through a plurality of groups of bolts.
4. The specimen holder for the tensile test according to claim 3, characterized in that: the compression screw is an outer hexagon bolt.
5. The specimen holder for the tensile test according to claim 4, characterized in that: the anti-slip strip is detachably connected with the sliding block.
6. The specimen holder for the tensile test according to claim 4, characterized in that: the anti-slip strip and the sliding block are of an integrally formed structure.
7. The specimen holder for the tension test according to any one of claims 1 to 6, characterized in that: the hydraulic jaw clamping device is characterized by further comprising a support, a hydraulic push rod, a fixed seat, a movable seat and a controller, wherein the fixed seat and the movable seat are respectively placed on the upper side and the lower side of the support, and the two jaw bases and parts thereof are respectively installed on the fixed seat and the movable seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220503801.XU CN217237481U (en) | 2022-03-08 | 2022-03-08 | Tensile test's test piece anchor clamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220503801.XU CN217237481U (en) | 2022-03-08 | 2022-03-08 | Tensile test's test piece anchor clamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217237481U true CN217237481U (en) | 2022-08-19 |
Family
ID=82840703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220503801.XU Expired - Fee Related CN217237481U (en) | 2022-03-08 | 2022-03-08 | Tensile test's test piece anchor clamps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217237481U (en) |
-
2022
- 2022-03-08 CN CN202220503801.XU patent/CN217237481U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220819 |
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| CF01 | Termination of patent right due to non-payment of annual fee |