Clamping device and tensile strength detection tool

Abstract

The clamping device and the tensile strength detection tool comprise a main body, and the main body is provided with a clamping groove; the device further comprises a movable assembly, the movable assembly is fixed to the main body, the movable assembly is provided with a plurality of movable limiting rods which penetrate through the clamping grooves, and when the to-be-tested product is partially placed into the clamping grooves, part of the limiting rods move and are matched with the limiting rods which do not move to limit the to-be-tested product. The limiting device is suitable for fixing and limiting products in different shapes and is high in universality.

Description

Technical Field

[0001] The invention relates to the field of tensile strength testing, in particular to a clamping device and a tensile strength testing tool. Background Art

[0002] The tensile strength test tool is a device or tool used to determine the performance and strength of materials under tensile loading. In the field of materials science and engineering, tensile strength testing is a common experimental method used to evaluate the performance indicators of materials or products under tensile conditions, such as tensile strength, yield strength, elongation, etc. Through the tensile strength test tool, the tensile properties of various materials such as metals, plastics, rubbers, fibers, etc. can be evaluated and compared.

[0003] The existing tensile testing tooling, taking the testing of the tensile strength of steel wire as an example, includes a driving part, a threaded rod, a movable seat, a tension sensor, a first clamping seat, a second clamping seat, a fixed seat, a ratchet, two clamping assemblies, a winding wheel and a fixing assembly, etc. When the steel wire is subjected to a tensile test, first one end of the steel wire is fixed by the first clamping seat and the second clamping seat, and then the other end of the steel wire can be fixed by the fixing assembly, and after the fixing is completed, the winding wheel can be rotated to keep the steel wire taut for easy testing. Compared with traditional clamping fixtures, it has a good fixing effect on both ends of the steel wire, and thus has the characteristics of safe use and stable operation.

[0004] When in use, the above-mentioned equipment adopts the first clamping seat and the second clamping seat to process the steel wire for fixing. In actual application, the first clamping seat and the second clamping seat are connected by bolts. The fixing and removal of the steel wire require repeated tightening of the bolts. The overall operation is relatively cumbersome. At the same time, the structure of the first clamping seat and the second clamping seat is relatively simple and is only suitable for the fixing of the steel wire, which is inconvenient for tensile strength testing of other special-shaped workpieces. Summary of the invention

[0005] The main purpose of the present invention is to overcome the defect that the clamping device in the prior art can only be used to test specific products, and to provide a clamping device and a tensile strength testing tool that can be used to test materials or products of different shapes and has high versatility.

[0006] The present invention adopts the following technical solution:

[0007] A clamping device includes a main body, which is provided with a clamping groove; and a movable component, which is fixed to the main body and provided with a plurality of movable limiting rods which penetrate the clamping groove. When a product to be tested is partially placed in the clamping groove, some of the limiting rods move and cooperate with the limiting rods that have not moved to limit the product to be tested.

[0008] Furthermore, the clamping device also includes a cover plate, which is hinged to the main body; the movable component is penetrated through the side of the main body opposite to the cover plate, and the limiting rod can move in the clamping groove.

[0009] Furthermore, the main body includes a first plate and a second plate, the first plate is provided with a plurality of first holes to fix the movable component; one side of the second plate is vertically connected to the first plate to form a clamping groove, and the cover plate is hinged to the other side of the second plate and is opposite to the first plate.

[0010] Furthermore, the movable component includes several fixed tubes, which are relatively fixed to one side of the clamping groove, and one end of several limit rods are inserted into the several fixed tubes one by one; several second holes are provided on the other side of the clamping groove for the other end of the limit rod to be inserted; and an elastic member is also provided between the limit rod and the fixed tube.

[0011] A tensile strength testing tool comprises a base and two clamping devices, wherein the clamping devices are respectively located on the base, and one clamping device slides relative to the base in a direction approaching or away from the other clamping device; the clamping device is one of the above-mentioned clamping devices.

[0012] Furthermore, the clamping device also includes a mounting plate, which is fixed relative to the clamping groove, and the mounting plate and the base are in sliding fit.

[0013] Furthermore, the base is provided with a slide groove, and a plurality of ball groups are embedded in the bottom surface of the slide groove; the bottom surface of the mounting plate is in sliding fit with the ball group.

[0014] Furthermore, guide grooves are arranged on two opposite sides of the slide groove, and the guide grooves extend along the sliding direction of the mounting plate; and the two sides of the mounting plate are respectively embedded in the guide grooves.

[0015] Furthermore, the ball group includes a plurality of balls, and the balls of the plurality of ball groups are distributed in an array; the bottom surface of the slide groove is provided with grooves distributed in an array, and the balls can be rolled and embedded in the corresponding grooves.

[0016] Furthermore, the base is provided with a bottom plate and two fixed plates, and the two fixed plates are fixedly connected to the two ends of the bottom plate; the clamping device is divided into a first clamping device and a second clamping device, and the first clamping device can slide relative to the second clamping device; and it also includes a tension sensor, which is connected between the second clamping device and one of the fixed plates.

[0017] Furthermore, it also includes a connecting rod, which is movably installed in another fixed plate and one end of which is connected to the second clamping device, and the other end of the connecting rod is connected to the driving device.

[0018] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The tooling of the present invention is provided with a clamping groove and a movable assembly on the clamping device. When the product to be tested is partially placed in the clamping groove of the clamping device, part of the limiting rods in the movable assembly moves and cooperates with the limiting rods that have not moved to limit the product to be tested. It is suitable for fixed limiting of products of different shapes and has high versatility.

[0020] 2. The tooling of the present invention, the clamping device includes a main body and a cover plate, the cover plate is hinged to the main body and is provided with a second hole for inserting a limit rod, the movable component is penetrated through the side of the main body opposite to the cover plate, and the limit rod can move in the clamping groove; the cover plate is opened to put the product to be tested, and after the product to be tested is limited, the cover plate is closed to position the limit rod that has not moved, thereby ensuring that the cooperation between the product to be tested and the movable component is more stable, no bolts need to be tightened, and the overall operation is convenient.

[0021] 3. The tooling of the present invention, the movable component also includes a plurality of fixed tubes, one ends of a plurality of limit rods are inserted into the plurality of fixed tubes one by one, and elastic parts are also arranged between the limit rods and the fixed tubes; a plurality of evenly spaced limit rods can cover the limit grooves, so as to adapt to products to be tested of different shapes, especially special-shaped products.

[0022] 4. The tooling of the present invention, the clamping device also includes a mounting plate, the base is provided with a slide groove, a ball group is embedded in the slide groove, and the sliding friction is reduced by sliding cooperation between the mounting plate and the ball group on the base, so that the sliding of the clamping device is smoother and the test result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the structural diagram of the tooling of the present invention;

[0024] Figure 2 It is the structural diagram of the clamping device;

[0025] Figure 3 for Figure 1 A magnified image of point A;

[0026] Figure 4 This is the matching diagram of the fixed sleeve and the limit rod;

[0027] Figure 5 A diagram showing the coordination of a part of the product to be tested with its active components;

[0028] Figure 6 A diagram showing the coordination of parts and active components of another product to be tested;

[0029] in:

[0030] 10. Base; 11. Slide; 12. Ball group; 13. Ball; 14. Groove; 15. Bottom plate; 16. Fixed plate; 17. Guide groove; 20. Clamping device; 20a. First clamping device; 20b. Second clamping device; 21. Clamping groove; 22. Main body; 23. Cover plate; 24. First plate; 25. Second plate; 26. First hole, 27. Second hole; 28. Mounting plate; 30. Movable assembly; 31. Limit rod; 32. Fixed tube; 33. Elastic member; 40. Tension sensor; 50. Connecting rod; 60. Product to be tested.

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0032] The present invention is further described below through specific implementation modes.

[0033] See also Figures 1 to 6 A clamping device is used to clamp a product 60 to be tested so as to facilitate tensile strength testing. The clamping device 20 is provided with a main body 22 and a movable component 30, and the main body is provided with a clamping groove 21. The movable component 30 is fixed to the movable component 30, and the movable component 30 is provided with a plurality of movable limiting rods 31 that penetrate the clamping groove 21 and are movable. When the product 60 to be tested is partially placed in the clamping groove 21, some limiting rods 31 move under the gravity of the product 60 to be tested, while the limiting rods 31 that are not subjected to the gravity of the product 60 to be tested do not move. The limiting of the product 60 to be tested is achieved by the cooperation of the movable limiting rods 31 and the immovable limiting rods 31. When the product 60 to be tested is not placed in the clamping groove 21, a plurality of limiting rods 31 can be evenly spaced to fill the clamping groove 21. The number of limiting rods 31 and the distance between adjacent limiting rods 31 can be set according to the size of the clamping groove 21 and the size of the product 60 to be tested, and are not specifically limited.

[0034] The clamping device 20 further includes a cover plate 23, which is hinged to the main body 22. The cover plate 23 is opened or closed relative to the main body 22. When the cover plate 23 is closed relative to the main body, the side of the cover plate 23 facing the clamping groove 21 serves as a side edge of the clamping groove 21. The movable component 30 is penetrated through a side edge of the main body 22 opposite to the cover plate 23. The limit rod 31 can move in the clamping groove 21, and the limit rod 31 is perpendicular to the cover plate 23. When the cover plate 23 is opened, a part of the product 60 to be tested can be placed in the clamping groove 21. After the part of the product 60 to be tested is located in the clamping groove 21, the cover plate 23 can be covered.

[0035] The main body 22 includes a first plate 24 and a second plate 25. The first plate 24 is provided with a plurality of first holes 26 for fixing the movable assembly 30. One side of the second plate 25 is vertically connected to the side of the first plate 24 to form a clamping groove 21. The side of the second plate 25 facing the clamping groove 21 serves as the inner side of the clamping groove 21. The cover plate 23 is hinged to the other side of the second plate 25 and is opposite to the first plate 24. That is, the first plate 24, the second plate 25 and the cover plate 23 enclose a clamping groove 21 having two side edges and an inner side edge, and the other sides of the clamping groove 21 are openings, so that the products 60 to be tested of different shapes and sizes can be placed therein.

[0036] The movable assembly 30 includes a plurality of fixed tubes 32, which are arranged one-to-one with the plurality of first holes 26 on the first plate 24, and one end of the fixed tube 32 is fixedly connected to the first hole 26 and is provided with an opening, and the other end of the fixed tube 32 is located outside the clamping groove 21 and is closed. The bottom ends of the plurality of limit rods 31 are inserted into the openings of the plurality of fixed tubes 32 one-to-one, and the limit rods 31 can move relative to the fixed tubes 32. The other side of the clamping groove 21, that is, the cover plate 23, is provided with a plurality of second holes 27, which may pass through the cover plate 23 or not. An elastic member 33 is also arranged between the limit rod 31 and the fixed tube 32, one end of the elastic member 33 is connected to the bottom end of the limit rod 31, and the other end of the elastic member 33 is connected to the closed end of the fixed tube 32. When the cover 23 is closed, the top end of the limiting rod 31 is inserted into the second hole 27 on the cover 23. After the cover 23 is opened and the product 60 to be tested is placed, the top end of the limiting rod 31 covered by the product 60 to be tested moves downward under the gravity of the product 60 to be tested, so that the elastic member 33 is compressed.

[0037] This embodiment also provides a tensile strength test tool, including a base 10 and two clamping devices 20, and the clamping devices 20 are implemented by the above-mentioned clamping devices. The two clamping devices 20 are respectively located at both ends of the base 10, and one clamping device 20 can slide relative to the base along the direction close to or away from the other clamping device 20, that is, the slidable clamping device 20 can slide toward the other clamping device 20 or slide away from the other clamping device 20, and the other clamping device 20 is connected to the base 10. The main structures of the two clamping devices 20 are the same, and the two are symmetrically arranged on the base 10.

[0038] The clamping device 20 further includes a mounting plate 28, which is fixed relative to the clamping groove 21. Specifically, the mounting plate 28 is fixed to the closed end of the fixing tube 32. In actual applications, the mounting plate 28 can also be fixedly connected to the main body 22. The mounting plates 28 of the two clamping devices 20 are slidably matched with the base 10, or the mounting plate 28 of the sliding clamping device 20 is slidably matched with the base 10, and the mounting plate 28 of the other clamping device 20 is in contact with the base 10.

[0039] Specifically, the base 10 is provided with a slide groove 11, and a ball group 12 is embedded in the bottom surface of the slide groove 11. The bottom surface of the mounting plate 28 of the two clamping devices 20 is in sliding cooperation with the ball group 12, or the mounting plate 28 of the sliding clamping device 20 is in sliding cooperation with the ball group 12. The provision of the ball group 12 can reduce the contact area between the slide groove 11 and the bottom surface of the mounting plate 28, and reduce the sliding friction. In order to ensure the sliding direction of the mounting plate 28, guide grooves 17 are provided on two opposite sides of the slide groove 11. The guide grooves 17 extend along the sliding direction of the mounting plate 28. Both sides of the mounting plate 28 are respectively embedded in the guide grooves 17. The installation stability of the mounting plate 28 is maintained by the guide grooves 17 to prevent it from escaping from the slide groove 11.

[0040] In this embodiment, the ball group 12 includes a plurality of balls 13 distributed in an array, and the bottom surface of the slide groove 11 is provided with grooves 14 distributed in an array, and the balls 13 can be rolled and embedded in the corresponding grooves 14. The balls 13 of the ball group 12 are not limited to being distributed in an array, but can also be divided into several groups for horizontal or vertical spacing distribution, which is specifically designed according to actual needs.

[0041] In order to facilitate the distinction between the two clamping devices 20, a first clamping device 20a and a second clamping device 20b are defined herein, and the first clamping device 20a can slide relative to the base 10 in a direction close to or away from the second clamping device 20b. The base 10 is provided with a bottom plate 15 and two fixed plates 16, a slide groove 11 is provided on the top surface of the bottom plate 15, the two fixed plates 16 are fixedly connected to the two ends of the bottom plate 15, and the two fixed plates 16 are respectively opposite to the first clamping device 20a and the second clamping device 20b. A tension sensor 40 is also included, the tension sensor 40 is connected between the second clamping device 20b and the corresponding fixed plate 16, and the tension applied to the second clamping device 20b is detected by the tension sensor 40. The tension sensor 40 can be connected to an external detection device.

[0042] This embodiment also includes a connecting rod 50, which is movably arranged on the fixed plate 16 opposite to the first clamping device 20a, one end of the connecting rod 50 is connected to the first clamping device 20a, and the other end of the connecting rod 50 is connected to a driving device, which is used to drive the connecting rod 50 to move and then drive the first clamping device 20a to slide. The driving device can adopt a common driving structure, such as a cylinder or a motor and a gear set.

[0043] A tensile strength testing tool of this embodiment performs a tensile strength testing method as follows:

[0044] Before testing the product 60 to be tested, the cover plate 23 closes the clamping slot 21 , and in the movable assembly 30 , due to the action of the elastic member 33 , the top ends of the respective limit rods 31 are respectively inserted into the corresponding second holes 27 on the cover plate 23 .

[0045] When the tensile strength test is to be performed, the first clamping device 20a is controlled by the driving device to slide relative to the base 10 toward the second clamping device 20b until the distance between the two is less than the length of the product 60 to be tested, and the cover plate 23 of the first clamping device 20a and the second clamping device 20b is opened, and the two ends of the product 60 to be tested are respectively placed in the clamping grooves 21 of the two clamping devices 20. In each clamping groove 21, part of the limiting rod 31 moves under the gravity of the product 60 to be tested, and the unmoved limiting rod 31 limits the edge of the product 60 to be tested, and the corresponding end of the product 60 to be tested is limited by the cooperation of the moving limiting rod 31 and the unmoved limiting rod 31. The cover plate 23 is covered, and the end of the unmoved limiting rod 31 is inserted into the second hole 27 of the cover plate 23 to further ensure the stability of the cooperation between the product 60 to be tested and the movable component 30.

[0046] The driving device is used to control the first clamping device 20a to slide relative to the base 10 away from the second clamping device 20b, thereby stretching the product 60 to be tested, and the tension exerted on the second clamping device 20b is detected in real time, and the tensile strength of the product 60 to be tested is determined based on the tension.

[0047] In this embodiment, for different products 60 to be tested, the cooperation between the movable component 30 and the product 60 to be tested is different. For the detection of steel wire, the end of the steel wire can be wound into a circle and then placed in the clamping groove 21 for fixing. For other special-shaped products, see Figure 5 The end of the product 60 to be tested is similar to a T-shape. The limit rod 31 covered by the T-shape in the figure moves under the gravity of the product 60 to be tested, and the limit rod 31 not covered remains stationary and surrounds the edge of the end of the product 60 to be tested, thereby fixing the product 60 to be tested. Figure 6 The end of the product to be tested 60 is similar to a ring. The limiting rod 31 covered by the ring product in the figure moves under the action of gravity of the product to be tested 60, and the uncovered limiting rod 31 remains stationary and surrounds the edge of the end of the product to be tested 60, thereby fixing the product to be tested 60.

[0048] In the present invention, the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. In the description, the directions or positional relationships indicated by "upper", "lower", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and are not intended to indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0050] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A clamping device, comprising a main body, characterized in that: The main body is provided with a clamping groove; it also includes a movable component, which is fixed to the main body, and the movable component is provided with a plurality of movable limiting rods which penetrate the clamping groove. When the product to be tested is partially placed in the clamping groove, some of the limiting rods move and cooperate with the limiting rods that have not moved to limit the product to be tested.

2. A clamping device according to claim 1, characterized in that: The clamping device also includes a cover plate, which is hinged to the main body; the movable component is arranged on the side of the main body opposite to the cover plate, and the limiting rod can move in the clamping groove.

3. A clamping device according to claim 1, characterized in that: The main body includes a first plate and a second plate, the first plate is provided with a plurality of first holes to fix the movable component; one side of the second plate is vertically connected to the first plate to form the clamping groove, and the cover plate is hinged to the other side of the second plate and is opposite to the first plate.

4. A clamping device according to claim 1, characterized in that: The movable component includes a plurality of fixed tubes, which are relatively fixed to one side of the clamping groove, and one ends of a plurality of limit rods are inserted into the plurality of fixed tubes one by one; a plurality of second holes are provided on the other side of the clamping groove for the other ends of the limit rods to be inserted; an elastic member is also provided between the limit rod and the fixed tube.

5. A tensile strength testing tool, comprising a base and two clamping devices, wherein the clamping devices are respectively located on the base, and one of the clamping devices slides relative to the base in a direction close to or away from the other clamping device; characterized in that: The clamping device is a clamping device according to any one of claims 1 to 4.

6. A tensile strength testing tool as claimed in claim 5, characterized in that: The clamping device also includes a mounting plate, which is fixed relative to the clamping groove, and the mounting plate and the base are in sliding cooperation.

7. A tensile strength testing tool as claimed in claim 6, characterized in that: The base is provided with a slide groove, and a plurality of ball groups are embedded in the bottom surface of the slide groove; the bottom surface of the mounting plate is in sliding fit with the ball groups.

8. A tensile strength testing tool as claimed in claim 7, characterized in that: Two opposite sides of the slide groove are provided with guide grooves, and the guide grooves extend along the sliding direction of the mounting plate; the two sides of the mounting plate are respectively embedded in the guide grooves.

9. A tensile strength testing tool as claimed in claim 7, characterized in that: The ball group includes a plurality of balls, and the balls of the plurality of ball groups are distributed in an array; the bottom surface of the slide groove is provided with grooves distributed in an array, and the balls can be rolled and embedded in the corresponding grooves.

10. A tensile strength testing tool as claimed in claim 5, characterized in that: The base is provided with a bottom plate and two fixed plates, and the two fixed plates are fixedly connected to the two ends of the bottom plate; the clamping device is divided into a first clamping device and a second clamping device, and the first clamping device can slide relative to the second clamping device; and it also includes a tension sensor, and the tension sensor is connected between the second clamping device and one of the fixed plates.

11. A tensile strength testing tool as claimed in claim 10, characterized in that: It also includes a connecting rod, which is movably arranged on the other fixing plate and one end of which is connected to the second clamping device, and the other end of the connecting rod is connected to the driving device.

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