A tensile property testing device for films

Abstract

The application relates to the technical field of tensile property testing, and discloses a tensile property testing device for films, which comprises a shell, a movable cavity is formed in the inner wall of the shell, a convex sliding block is slidably connected to the inner wall of the shell in the movable cavity, a screw nut is embeddedly installed on the inner wall of the convex sliding block, a driving screw is threadedly arranged in the inner wall of the screw nut, and the two ends of the driving screw are rotatably installed on the inner wall of the shell. A guide rod and a spring are arranged around the driving screw, and the two ends of the spring are fixedly installed on the inner bottom wall of the shell and the convex sliding block respectively. When impact force is generated due to film stretching and fracture, the spring can effectively absorb the fracture impact energy through elastic deformation, the direct effect of the impact force on the threads of the driving screw and the screw nut is reduced, the threads are prevented from being abraded, the transmission accuracy is ensured, meanwhile, the pre-tightening force of the spring can eliminate the reverse gap between the convex sliding block and the shell, the displacement measurement error is reduced, the testing result is more accurate and reliable, the service life of the equipment is prolonged, and the testing stability is improved.

Description

Technical Field

[0001] This application relates to the field of tensile performance testing technology, specifically to a tensile performance testing device for membranes. Background Technology

[0002] Protective film is a common industrial consumable. During the production process, protective film needs to be tested to ensure a good yield of finished products.

[0003] Currently, when testing the tensile properties of membranes, electric actuators or a combination of a motor and a lead screw are generally used as the pulling power source. However, when the membrane breaks during the stretching process, it generates a fracture impact force. This impact force may affect the transmission system in the electric actuator or cause wear on the threads of the lead screw, reducing transmission accuracy and thus reducing the accuracy of the test structure. Utility Model Content

[0004] The purpose of this application is to provide a membrane tensile performance testing device, which solves the problem mentioned in the background art that when testing the tensile performance of membranes, an electric push rod or a combination of a motor and a lead screw is generally used as the pulling power source. However, when the membrane breaks during the stretching process, it will generate a fracture impact force, which may affect the transmission system in the electric push rod or cause wear on the threads of the lead screw, reducing the transmission accuracy and thus reducing the accuracy of the test structure.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This application provides a membrane tensile performance testing device, including a housing. An movable cavity is formed in the inner wall of the housing. A convex slider is slidably connected to the inner wall of the housing within the movable cavity. A lead screw nut is embedded in the inner wall of the convex slider. A drive screw is threaded through the inner wall of the lead screw nut. Both ends of the drive screw are rotatably mounted to the inner wall of the housing. Multiple sets of guide rods arranged in a circular array are fixedly mounted on the inner wall of the housing around the drive screw. Springs are sleeved on the outer walls of the multiple sets of guide rods. The lower ends of the springs are fixedly mounted to the bottom wall of the housing, and the upper ends of the springs are fixedly mounted to the lower end of the convex slider. Clamping mechanisms for holding the two ends of the membrane are respectively provided on one side of the convex slider and one side of the housing.

[0006] By adopting the above technical solution, and by setting guide rods and springs around the drive screw, and fixing the two ends of the springs to the bottom wall of the housing and the convex slider respectively, when the membrane is stretched and fractured, the springs can effectively absorb the fracture impact energy through elastic deformation, reducing the direct impact of the impact force on the drive screw and screw nut threads, avoiding thread wear, and ensuring transmission accuracy. At the same time, the preload of the springs can eliminate the backlash between the convex slider and the housing, reduce displacement measurement errors, make the test results more accurate and reliable, extend the service life of the equipment, and improve the stability of the test.

[0007] Optionally, the clamping mechanism includes two sets of U-shaped clamps, which are respectively fixedly installed on the outer wall of the convex slider and the housing. Electric push rods are respectively installed in the inner wall of the two sets of U-shaped clamps, and clamping plates are respectively fixedly installed on the telescopic ends of the two electric push rods.

[0008] By adopting the above technical solution, the housing and the convex slider can respectively fix the U-shaped clamp, and the U-shaped frame can fix the electric push rod. The electric push rod can drive the clamping plate to move laterally, and the clamping plate and the inner wall of the U-shaped clamp can clamp and position the membrane.

[0009] Optionally, the two clamping plates have a set of serrated grooves on the side away from the electric push rod and on the inner wall of the corresponding U-shaped frame, and each set of serrated grooves is staggered.

[0010] By adopting the above technical solution, the clamping effect between the clamping plate and the U-shaped clamp can be enhanced by setting the serrated groove.

[0011] Optionally, a reciprocating motor is installed at the upper end of the housing, and the output shaft of the reciprocating motor is fixedly installed with the drive screw.

[0012] By adopting the above technical solution, the housing can fix the reciprocating motor, and the reciprocating motor can drive the drive screw to rotate.

[0013] Optionally, a cover is fixedly installed on the outer wall of the housing.

[0014] By adopting the above technical solution, the shell cover can be used to open and close the shell.

[0015] Optionally, a base plate is fixedly installed at the lower end of the housing, and multiple sets of mounting holes are provided on the upper side of the base plate.

[0016] By adopting the above technical solution, the housing can be installed in the installation position with the help of external bolts through the setting of the mounting holes.

[0017] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows: The technical solution of this application sets a guide rod and a spring around the drive screw, and fixes the two ends of the spring to the bottom wall of the housing and the convex slider respectively. When the membrane is stretched and fractured, the spring can effectively absorb the fracture impact energy through elastic deformation, reduce the direct impact of the impact force on the drive screw and screw nut threads, avoid thread wear, and ensure transmission accuracy. At the same time, the preload of the spring can eliminate the backlash between the convex slider and the housing, reduce displacement measurement error, make the test results more accurate and reliable, extend the service life of the equipment, and improve the test stability. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is an axial view schematic diagram of a membrane tensile performance testing device according to this application; Figure 2 This is a rear view schematic diagram of a membrane tensile performance testing device according to this application; Figure 3 This application discloses a membrane tensile performance testing device. Figure 2 Enlarged view of point A in the middle; Figure 4 This is a top view schematic diagram of the convex slider of a membrane tensile performance testing device according to this application.

[0019] In the diagram: 1. Housing; 2. Movable cavity; 3. Convex slider; 4. Lead screw nut; 5. Drive lead screw; 6. Guide rod; 7. Spring; 8. Reciprocating motor; 9. Housing cover; 10. U-shaped clamp; 11. Electric push rod; 12. Clamping plate; 13. Serrated groove; 14. Base plate; 15. Mounting hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4This application provides a technical solution: a membrane tensile performance testing device, including a housing 1, an movable cavity 2 opened in the inner wall of the housing 1, a convex slider 3 slidably connected to the inner wall of the housing 1 inside the movable cavity 2, a screw nut 4 embedded in the inner wall of the convex slider 3, a drive screw 5 threaded through the inner wall of the screw nut 4, the two ends of the drive screw 5 being rotatably installed with the inner wall of the housing 1, a plurality of guide rods 6 arranged in a circular array fixedly installed on the inner wall of the housing 1 around the drive screw 5, a spring 7 sleeved on the outer wall of the plurality of guide rods 6, the lower end of the spring 7 being fixedly installed with the inner bottom wall of the housing 1, the upper end of the spring 7 being fixedly installed with the lower end of the convex slider 3, and clamping mechanisms for clamping the two ends of the membrane being respectively provided on one side of the convex slider 3 and one side of the housing 1; In the technical solution of this application, by setting guide rods 6 and springs 7 around the drive screw 5, and fixing the two ends of springs 7 to the inner bottom wall of housing 1 and the convex slider 3 respectively, when the membrane is stretched and fractured, the springs 7 can effectively absorb the fracture impact energy through elastic deformation, reduce the direct impact of the impact force on the threads of the drive screw 5 and screw nut 4, avoid thread wear, and ensure transmission accuracy. At the same time, the preload of springs 7 can eliminate the backlash between the convex slider 3 and housing 1, reduce displacement measurement errors, make the test results more accurate and reliable, extend the service life of the equipment, and improve the test stability.

[0022] In the technical solution of this application, such as Figure 1 and Figure 2 As shown, a reciprocating motor 8 is installed at the upper end of the housing 1. The output shaft of the reciprocating motor 8 is fixedly installed with the drive screw 5. The housing 1 can fix the reciprocating motor 8, and the reciprocating motor 8 can drive the drive screw 5 to rotate. A housing cover 9 is fixedly installed on the outer wall of the housing 1. The housing cover 9 can open and close the housing 1. A base plate 14 is fixedly installed at the lower end of the housing 1. Multiple sets of mounting holes 15 are opened on the upper side of the base plate 14. The housing 1 can be installed in the installation position with the help of external bolts through the mounting holes 15.

[0023] In the technical solution of this application, such as Figure 1As shown, the clamping mechanism includes two sets of U-shaped clamps 10. The two sets of U-shaped clamps 10 are respectively fixedly installed on the outer wall of the convex slider 3 and the housing 1. Electric push rods 11 are respectively installed in the inner wall of the two sets of U-shaped clamps 10. Clamping plates 12 are respectively fixedly installed on the telescopic ends of the two electric push rods 11. The housing 1 and the convex slider 3 can fix the U-shaped clamps 10, and the U-shaped frame can fix the electric push rods 11. The electric push rods 11 can drive the clamping plates 12 to move laterally. The clamping plates 12 and the inner wall of the U-shaped clamps 10 can clamp and position the membrane. A set of serrated grooves 13 are respectively opened on the side of the two clamping plates 12 away from the electric push rods 11 and the inner wall of the corresponding U-shaped frame. Each set of serrated grooves 13 is staggered. The serrated grooves 13 can enhance the clamping effect between the clamping plates 12 and the U-shaped clamps 10.

[0024] In use, the reciprocating motor 8 drives the drive screw 5 to rotate. Since the drive screw 5 is threadedly engaged with the screw nut 4 inside the convex slider 3, and the convex slider 3 can only slide along the movable cavity 2 under the restriction of the guide rod 6, the rotation of the drive screw 5 drives the convex slider 3 to move. After the two ends of the membrane are clamped by the clamping mechanism, the convex slider 3 moves to stretch the membrane. When the membrane stretches and breaks, generating an impact force, the spring 7, which is sleeved on the guide rod 6 and whose two ends are respectively connected to the inner bottom wall of the housing 1 and the convex slider 3, elastically deforms to absorb the impact energy, reducing the direct effect of the impact force on the threads of the drive screw 5 and the screw nut 4. At the same time, the preload of the spring 7 eliminates the reverse gap between the convex slider 3 and the housing 1, reducing displacement measurement errors and making the test more accurate and stable.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A membrane tensile property testing device, characterized in that: The device includes a housing (1), the inner wall of which has a movable cavity (2). A convex slider (3) is slidably connected to the inner wall of the housing (1) inside the movable cavity (2). A screw nut (4) is embedded in the inner wall of the convex slider (3). A drive screw (5) is threaded through the inner wall of the screw nut (4). The two ends of the drive screw (5) are rotatably installed with the inner wall of the housing (1). Multiple sets of guide rods (6) arranged in a circular array are fixedly installed on the inner wall of the housing (1) around the drive screw (5). Springs (7) are sleeved on the outer walls of the multiple sets of guide rods (6). The lower end of the spring (7) is fixedly installed with the inner bottom wall of the housing (1). The upper end of the spring (7) is fixedly installed with the lower end of the convex slider (3). A clamping mechanism for clamping the two ends of the membrane is respectively provided on one side of the convex slider (3) and the housing (1).

2. The membrane tensile performance testing device according to claim 1, characterized in that, The clamping mechanism includes two sets of U-shaped clamps (10). The two sets of U-shaped clamps (10) are respectively fixedly installed on the outer wall of the convex slider (3) and the housing (1). Electric push rods (11) are respectively installed in the inner wall of the two sets of U-shaped clamps (10). Clamping plates (12) are respectively fixedly installed on the telescopic ends of the two electric push rods (11).

3. The membrane tensile property testing device according to claim 2, characterized in that, The two clamps (12) have a set of serrated grooves (13) on the side away from the electric push rod (11) and the inner wall of the corresponding U-shaped frame, respectively. Each set of serrated grooves (13) is staggered.

4. The membrane tensile property testing device according to claim 1, characterized in that, A reciprocating motor (8) is installed at the upper end of the housing (1), and the output shaft of the reciprocating motor (8) is fixedly installed with the drive screw (5).

5. The membrane tensile performance testing device according to claim 1, characterized in that, A cover (9) is fixedly installed on the outer wall of the housing (1).

6. The membrane tensile property testing device according to claim 1, characterized in that, A base plate (14) is fixedly installed at the lower end of the housing (1), and multiple sets of mounting holes (15) are opened on the upper side of the base plate (14).

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