Full-servo universal tensile material testing machine for plastic products

Abstract

The invention discloses a full-servo universal tensile material testing machine for plastic products, and belongs to the technical field of plastic product production. The device comprises a working table, a support is fixedly connected to the upper side of the working table, a working plate is slidably connected into the support, clamping assemblies are installed on the upper side of the working plate and the upper side of the working table, shooting assemblies are installed on the outer sides of the clamping assemblies, extension assemblies are installed on the outer sides of the shooting assemblies, and each extension assembly comprises four moving plates. In the stretching process of the plastic product sample, the camera can perfectly transmit the change of the surface of the sample into the control center, and in the process, the camera can move along with the fixed frame and automatically adjust the position of the camera, so that the change of the sample can be better and more comprehensively shot, and the accuracy of the sample stretching is improved. And finally, the accuracy of subsequent experiment results is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic product production, and in particular to a full-servo universal tensile material testing machine for plastic products. Background Art

[0002] Plastic products are made of plastics, which are polymerized by addition polymerization or condensation polymerization, commonly known as plastics or resins. In the production process of plastic products, it is necessary to test the plastic products after production. Put the plastic product samples in the servo universal tensile material testing machine, start the servo universal tensile material testing machine, and start the corresponding testing operation. Compared with the traditional tensile material testing machine, the servo universal tensile material testing machine is a high-precision and multi-functional material mechanical property testing equipment, and uses a servo motor as the power source, with a precision transmission system (such as a ball screw), to achieve high-precision displacement and speed control (resolution can reach 0.1um), fast response speed; However, in the actual testing process, in order to better observe the changes in the test samples, a camera will be installed on the outside of the workbench to capture the changes in the samples through the camera. However, during the testing process, the camera is in a fixed position. Since plastic products have good ductility, they need to be stretched to a large length during the stretching test. The fixed camera cannot capture the changes in the plastic products very well. In addition, during the shooting process, when performing the stretching test, after stretching and reaching the appropriate position, the servo motor needs to be turned off first, so that the plastic products can rebound under their own action, thereby completing the test of the resilience of the plastic products. However, in this process, the plastic products are in the stretched position. The time is short (a long time in the stretching position is likely to cause damage to the plastic product, causing the plastic product to break and produce a large amount of fragments, which is dangerous and will increase the subsequent cleaning workload), the camera cannot capture the actual situation at the stretching position very well, and, in the stretching process, only the plastic product as a whole is stretched, and there is no local stretching operation on the plastic product. Finally, after the plastic product is stretched, the plastic product is removed from the clamping component, and the clamping component is cleaned, and the sample that may be stuck in the clamping component is cleaned. The overall workload is large and very troublesome. Therefore, a full-servo universal tensile material testing machine for plastic products is provided. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a full-servo universal tensile material testing machine for plastic products.

[0004] The present invention adopts the following technical solutions: A fully servo universal tensile material testing machine for plastic products, comprising a workbench, a bracket is fixedly connected to the upper side of the workbench, a working plate is slidably connected inside the bracket, clamping assemblies are installed on both the working plate and the upper side of the workbench, a photographing assembly is installed outside the clamping assembly, an extension assembly is installed outside the photographing assembly, the extension assembly includes four moving plates, a connecting frame is slidably connected to the outside of the four moving plates, control plates are fixedly connected to the ends of the four moving plates, a first spring is fixedly connected between the control plates and the connecting frame, a second connecting rod is fixedly connected to the outside of the connecting frame, a collar is fixedly connected to the end of the second connecting rod, the collar is slidably connected to the photographing assembly, a dual-axis motor is fixedly connected to the upper side of the workbench, reciprocating lead screws are fixedly connected to the output ends on both sides of the dual-axis motor, a reciprocating nut sleeve is threadedly connected to the outside of the reciprocating lead screw, the reciprocating nut sleeve is fixedly connected to a moving frame through a first connecting rod, and the second connecting rod slidably penetrates through the moving frame.

[0005] Preferably, an edge protrusion assembly is installed on the outside of the connecting frame. The edge protrusion assembly includes two moving circular plates. Deep grooves are opened on both sides of the moving plate. A rotating shaft is rotatably penetrated and connected inside the deep groove. A gear is fixedly connected to the rotating shaft inside the deep groove. A rack is fixedly connected inside the connecting frame through a fourth connecting rod. The rack is engaged with the gear. Control circular plates are fixedly connected to both sides of the rotating shaft. A plurality of square rods are fixedly connected to the outer circumference of the control circular plate. Two connecting plates are fixedly connected to the outside of the moving plate. A square plate slidably penetrates through the two connecting plates. A reciprocating frame is fixedly connected to the outside of the square plate. A second spring is fixedly connected between the reciprocating frame and the connecting plate. Two control rods are fixedly connected to the outside of the reciprocating frame. The reciprocating frame is fixedly connected to the moving circular plate through a third connecting rod.

[0006] Preferably, a rotating circular plate is fixedly connected to the rotating shaft inside the deep groove, and the outside of the rotating circular plate is arc-shaped.

[0007] Preferably, wave grooves are opened on both sides inside the connecting frame. Mounting rods are slidably connected inside the two wave grooves. The two mounting rods are fixedly connected to an insertion plate. An expansion rod is fixedly connected to the upper side of the insertion plate. A fixed ring is fixedly connected to the upper side of the expansion rod. Positioning rods are fixedly connected to both sides of the fixed ring. A control cylinder is slidably connected to the outside of the positioning rod. The control cylinder is fixedly connected to the connecting frame. A third spring is fixedly connected between the control cylinder and the fixed ring.

[0008] Preferably, the clamping assembly includes two clamping frames. A plurality of telescopic sleeves are fixedly connected inside the two clamping frames. Triangular clamping plates are fixedly connected to the outer sides of the plurality of telescopic sleeves. An inclined groove is formed in the upper side of the triangular clamping plate. A sliding rod is slidably and penetratingly connected inside the inclined groove. A limiting rod is fixedly connected to the upper side of the sliding rod. The limiting rod slidably penetrates through the clamping frame. A positioning frame is fixedly connected to the upper sides of the limiting rods. A hydraulic rod is fixedly connected between the positioning frame and the clamping frame. A threaded plate is fixedly connected to the upper side of the clamping frame. Two fixed frames are installed on the upper side of the workbench. One of the fixed frames is fixedly connected to the workbench, and the other fixed frame is fixedly connected to the workboard. Threaded rods are rotatably and penetratingly connected inside the two fixed frames. The threaded plate is threadedly connected to the threaded rod, and the threaded plate is slidably connected to the fixed frame.

[0009] Preferably, the photographing assembly includes a plurality of cameras and a plurality of rotating blocks. The plurality of rotating blocks are divided into two groups. Two rotating plates are rotatably connected to the outer side of each rotating block. A rotating rod is rotatably connected between two adjacent rotating blocks in different groups. The rotating rod is fixedly connected to the camera. The two outermost rotating plates are respectively rotatably connected to the fixed frame. A sliding plate is further fixedly connected to the outer side of the rotating rod. The sliding plate slidably penetrates through the support.

[0010] Preferably, a plurality of shock-absorbing plates are fixedly connected to the lower side of the workbench.

[0011] The beneficial effects of the present invention are as follows: 1. First, during the stretching process of the plastic product sample, the camera can perfectly transmit the changes on the surface of the sample to the control center. And during this process, the camera will also move along with the fixed frame, automatically adjusting the position of the camera, so as to better and more comprehensively photograph the changes of the sample. Since plastic products are generally transparent or semi-transparent, under the blocking effect of the moving plate, a light-shielding effect can be formed, enabling the camera to more clearly photograph the changes of the plastic product sample. And compared with vertical stretching, the method of horizontal stretching through a plurality of moving plates can make more reasonable use of the space on the upper side of the workbench, reducing the possibility that the camera cannot completely photograph the overall changes of the plastic product sample due to the excessive length of the plastic product sample, and ultimately improving the accuracy of subsequent experimental results; 2. Then, after one stretching is completed, start the double-shaft motor, which will drive the moving plate, the connecting frame and the control plate to move left and right back and forth as a whole. During this process, when the moving plate abuts against the sample, the moving plate will cause the sample to be stretched horizontally, enabling the camera to more clearly observe whether the sample is damaged, improving the photographing effect of the camera; 3. Moreover, during this process, it will cause the moving circular plate to move back and forth. When the moving circular plate abuts against the sample, it will cause the sample to move. And since the moving circular plate is located at the edge of the sample, it can enable the camera to better capture the changes in the edge area of the sample and can form a local stretching effect on the sample. 4. At the same time, when the rotating circular plate abuts against the sample, it will cause the sample to be further stretched horizontally, reducing the occurrence of wrinkles and improving the shooting effect. 5. Finally, after the stretching operation is completed and the sample is unloaded from the clamping assembly, the position of the clamping frame is adjusted. When the insertion plate abuts against the triangular clamping plate, it will form a slapping effect on the triangular clamping plate, cleaning the sample that may adhere to the inner side of the triangular clamping plate, thereby maintaining the cleanliness of the triangular clamping plate. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 2 It is a schematic connection diagram of the shooting assembly, clamping assembly, and extension assembly in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 3 It is a schematic connection diagram of the clamping assembly in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 4 For Figure 3 The enlarged structural view at A in Figure 5 It is a schematic connection diagram of the clamping assembly from another angle in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 6 It is a schematic connection diagram of the shooting assembly in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 7 It is a schematic connection diagram of the shooting assembly from another angle in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 8 It is a schematic connection diagram of the extension assembly in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 9 It is a schematic connection diagram of the moving plate and the connecting frame in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 10 It is a schematic connection diagram of the moving plate and the connecting frame from another angle in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 11Partial connection schematic diagram of a moving plate and a connecting frame in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 12 Connection schematic diagram of a reciprocating frame and a connecting plate in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 13 Internal connection schematic diagram of a deep groove in a fully servo universal tensile material testing machine for plastic products proposed by the present invention; Figure 14 Connection schematic diagram of a connecting frame and a plug plate in a fully servo universal tensile material testing machine for plastic products proposed by the present invention.

[0013] In the figure: 1 workbench, 2 support, 3 working plate, 4 clamping assembly, 41 triangular clamping plate, 42 fixed frame, 43 threaded rod, 44 threaded plate, 45 clamping frame, 46 positioning frame, 47 limiting rod, 48 sliding rod, 49 telescopic sleeve, 5 photographing assembly, 51 rotating block, 52 rotating plate, 53 rotating rod, 54 sliding plate, 55 camera, 6 extension assembly, 601 double-shaft motor, 602 reciprocating lead screw, 603 reciprocating nut, 604 first connecting rod, 605 moving frame, 606 second connecting rod, 607 collar, 608 moving plate, 609 connecting frame, 610 control board, 611 first spring, 612 rotating shaft, 613 rotating circular plate, 614 deep groove, 615 control circular plate, 616 plug plate, 617 moving circular plate, 618 control rod, 619 second spring, 620 square plate, 621 reciprocating frame, 622 connecting plate, 623 third connecting rod, 624 gear, 625 rack, 626 fourth connecting rod, 627 square rod, 628 wave groove, 629 mounting rod, 630 telescopic rod, 631 fixing ring, 632 positioning rod, 633 third spring, 634 control cylinder. Specific embodiments

[0014] Refer to Figures 1 - 14 , a fully servo universal tensile material testing machine for plastic products, including a workbench 1, a plurality of shock-absorbing plates are fixedly connected to the lower side of the workbench 1, a support 2 is fixedly connected to the upper side of the workbench 1, a working plate 3 is slidably connected inside the support 2, and clamping assemblies 4 are installed on both the working plate 3 and the upper side of the workbench 1; First, a servo motor is also fixedly connected to the upper side inside the bracket 2. The output end of the servo motor is connected to the input end of the ball screw through a rigid coupling. The nut of the ball screw is fixedly connected to the working plate 3. When it is necessary to perform a tensile test on a plastic product, first start the servo motor. The servo motor drives the ball screw to rotate. Since the working plate 3 and the bracket 2 are connected for sliding up and down, the ball screw will drive the working plate 3 to move up and down until the position of the working plate 3 meets the working requirements. Install the prepared sample in the clamping assembly 4, start the servo motor again, pull the plastic product, and start the tensile test operation. The above are all existing technologies and will not be elaborated further; The clamping assembly 4 includes two clamping frames 45. A plurality of telescopic sleeves 49 are fixedly connected inside the two clamping frames 45. Triangular clamping plates 41 are fixedly connected to the outer sides of the plurality of telescopic sleeves 49. An inclined groove is opened on the upper side of the triangular clamping plate 41. A sliding rod 48 is slidably penetrated and connected inside the inclined groove. A limiting rod 47 is fixedly connected to the upper side of the sliding rod 48. The limiting rod 47 is slidably penetrated through the clamping frame 45. The upper sides of the limiting rods 47 are fixedly connected together with a positioning frame 46. A hydraulic rod is fixedly connected between the positioning frame 46 and the clamping frame 45. A threaded plate 44 is fixedly connected to the upper side of the clamping frame 45. Two fixed frames 42 are installed on the upper side of the workbench 1. One of the fixed frames 42 is fixedly connected to the workbench 1, and the other fixed frame 42 is fixedly connected to the working plate 3. A threaded rod 43 is rotatably penetrated through both of the fixed frames 42. The threaded plate 44 is threadedly connected to the threaded rod 43, and the threaded plate 44 is slidably connected to the fixed frame 42; First, as Figure 4 shown, the clamping surface of the triangular clamping plate 41 is provided with serrations. Secondly, when it is necessary to perform a detection operation on a plastic product, first move the working plate 3 to a suitable working position. Place the detection sample between the working plate 3 and the workbench 1. Rotate the threaded rod 43. Since the thread directions on both sides of the threaded rod 43 are opposite, the rotating threaded rod 43 will drive the threaded plate 44 to move towards or away from each other. Continuously rotate the threaded rod 43. The threaded rod 43 drives the two clamping frames 45 to move through the threaded plate 44 until the distance between the two clamping frames 45 meets the working requirements. Place the sample to be detected between the two triangular clamping plates 41. Start the hydraulic rod. The hydraulic rod drives the positioning frame 46 to move downward. The positioning frame 46 drives the sliding rod 48 to move downward through the limiting rod 47. Under the limiting action of the telescopic sleeve 49, the downward-moving sliding rod 48 will drive the corresponding two triangular clamping plates 41 to move towards each other until the two triangular clamping plates 41 abut against the sample, thereby completing the clamping and fixing operation of the sample; The outer side of the clamping assembly 4 is equipped with a shooting assembly 5. The shooting assembly 5 includes a plurality of cameras 55 and a plurality of rotating blocks 51. The plurality of rotating blocks 51 are divided into two groups. Two rotating plates 52 are rotatably connected to the outer side of each rotating block 51. Two adjacent rotating blocks 51 in different groups are jointly rotatably connected to a rotating rod 53. The rotating rod 53 is fixedly connected to the camera 55. The two rotating plates 52 on the outermost sides are respectively rotatably connected to the fixed frame 42. A sliding plate 54 is also fixedly connected to the outer side of the rotating rod 53. The sliding plate 54 slidably penetrates through the bracket 2. The specific transmission structure of this shooting assembly 5 can enable the working plate 3 to automatically adjust the position of the camera 55 when moving up and down. This is prior art. An extension assembly 6 is installed on the outer side of the shooting assembly 5; First, as Figure 6 shown, the two rotating plates 52 on the outermost sides are respectively rotatably connected to the threaded rod 43. Secondly, the rotating rod 53 slidably penetrates through the collar 607. Then, during the tensile test, the upper working plate 3 drives the entire fixed frame 42 to move upward, forming a tensile effect on the sample. At the same time, the camera 55 is started. The camera 55 can photograph the sample and transmit the obtained data to the control center (such as a computer). Then, during the test, the camera 55 can perfectly transmit the changes on the surface of the sample to the control center. And during this process, the cameras 55 are evenly distributed on the outer side of the sample, and the distance between the cameras 55 is equal. Moreover, the camera 55 will also move along with the fixed frame 42, automatically adjusting the position of the camera 55, so as to better and more comprehensively photograph the changes of the sample, and ultimately improve the accuracy of the subsequent experimental results; An extension assembly 6 is installed on the outer side of the shooting assembly 5. The extension assembly 6 includes four moving plates 608. A connecting frame 609 is slidably connected to the outer sides of the four moving plates 608. Control plates 610 are fixedly connected to the ends of the four moving plates 608. A first spring 611 is fixedly connected between the control plate 610 and the connecting frame 609. A second connecting rod 606 is fixedly connected to the outer side of the connecting frame 609. A collar 607 is fixedly connected to the end of the second connecting rod 606. The collar 607 is slidably connected to the shooting assembly 5. A dual-axis motor 601 is fixedly connected to the upper side of the workbench 1. Reciprocating lead screws 602 are fixedly connected to the output ends on both sides of the dual-axis motor 601. A reciprocating nut 603 is threadedly connected to the outer sides of the reciprocating lead screws 602. The reciprocating nut 603 is fixedly connected to a moving frame 605 through a first connecting rod 604. The second connecting rod 606 slidably penetrates through the moving frame 605; First, during the sample fixation operation, one side of the sample is set to be permeable, and all four moving plates 608 are located inside the sample. The four moving plates 608 and the second connecting rod 606 do not collide with the sample and will not affect the normal stretching of the sample. After a tensile test is completed, since most plastic products have good ductility, the camera 55 cannot observe well the changes in the plastic product after stretching. At this time, the biaxial motor 601 can be started. The biaxial motor 601 drives the reciprocating lead screw 602 to rotate. Since the collar 607 is slidably connected to the shooting assembly 5, the rotating reciprocating lead screw 602 will drive the reciprocating nut 603, the first connecting rod 604 and the moving frame 605 to move left and right relative to the sample back and forth. The moving frame 605 drives the moving plate 608, the connecting frame 609 and the control board 610 to move left and right back and forth through the second connecting rod 606, taking Figure 9 as the basis, among which Figure 9 the moving plate 608, the connecting frame 609 and the control board 610 as a whole represent Figure 8 one of the moving plate 608, the connecting frame 609 and the control board 610 of the left part in

[0015] During the process of the moving plate 608, the connecting frame 609 and the control board 610 moving left and right back and forth, when the moving plate 608 abuts against the sample, the moving plate 608 will cause the sample to be stretched laterally, enabling the shooting assembly 5 to observe more clearly whether the sample is damaged and improving the shooting effect of the shooting assembly 5; Moreover, during the above working process, after the plastic product is stretched, due to the particularity of the plastic product, the stretched sample will rebound. During the detection process, not only the stretchability of the plastic product needs to be detected, but also the resilience of the plastic product needs to be detected. When the moving plate 608 causes the sample to be stretched laterally, the lateral stretching length of the sample is not enough to make the sample return to the state at the maximum stretch, but only facilitates the shooting assembly 5 to take better pictures and will not affect the normal shooting effect of the sample.

[0015] An edge convex component is installed outside the connection frame 609. The edge convex component includes two moving circular plates 617. Deep grooves 614 are formed on both sides of the moving plate 608. A rotating shaft 612 is rotatably penetrated and connected in the deep groove 614. A gear 624 is fixedly connected to the rotating shaft 612 in the deep groove 614. A rack 625 is fixedly connected to the connection frame 609 through a fourth connecting rod 626. The rack 625 is engaged with the gear 624. Control circular plates 615 are fixedly connected to both sides of the rotating shaft 612. A plurality of square rods 627 are fixedly connected to the outer circumference of the control circular plate 615. Two connecting plates 622 are fixedly connected to the outside of the moving plate 608. A square plate 620 is slidably penetrated and connected through the two connecting plates 622. A reciprocating frame 621 is fixedly connected to the outside of the square plate 620. A second spring 619 is fixedly connected between the reciprocating frame 621 and the connecting plate 622. Two control rods 618 are fixedly connected to the outside of the reciprocating frame 621. The outside of the reciprocating frame 621 is fixedly connected to the moving circular plate 617 through a third connecting rod 623; First, after the moving plate 608 abuts against the sample, the moving circular plate 617 also abuts against the sample, and one of the moving circular plates 617 is located in the edge area of the sample. When the moving plate 608 continues to move, due to the blocking effect of the sample, the moving speed of the moving plate 608 will be a little slower than the moving speed of the connection frame 609. As a result, while the first spring 611 deforms, the moving plate 608 moves relative to the connection frame 609. Based on the Figure 11 direction, the moving plate 608 moves to the right relative to the connection frame 609. At this time, since the rack 625 is fixedly connected to the connection frame 609 through the fourth connecting rod 626, the rotating shaft 612 and the gear 624 that follow the movement of the moving plate 608 will rotate, that is, Figure 13Based on the direction, it will cause the rotating shaft 612 and the gear 624 to rotate counterclockwise. The rotating shaft 612 drives the control circular plate 615 and the square rod 627 to rotate counterclockwise. The square rod 627 abuts against the control rod 618, which will cause the control rod 618 and the reciprocating frame 621 to move backward. The reciprocating frame 621 drives the moving circular plate 617 to move backward through the third connecting rod 623. The reciprocating frame 621 will cause the second spring 619 to deform until the control rod 618 and the square rod 627 are disconnected. As a result, the control rod 618 and the reciprocating frame 621 as a whole move back and forth, that is, the moving circular plate 617 moves back and forth. The moving circular plate 617 abuts against the sample, which will cause the sample to move. And since the moving circular plate 617 is located at the edge of the sample, it can enable the photographing assembly 5 to better photograph the changes in the edge area of the sample, and can form a local stretching effect on the sample. And compared with vertical stretching, the horizontal stretching of multiple moving plates 608 can greatly save the working space on the upper side of the workbench 1. After the multiple moving plates 608 horizontally stretch the plastic product sample, when using the camera 505 to take pictures subsequently, the whole picture of the plastic product can be photographed, reducing the possibility that the overall change of the plastic product sample cannot be completely photographed due to excessive vertical stretching.

[0016] The rotating shaft 612 is fixedly connected with a rotating circular plate 613 in the deep groove 614, and the outer side of the rotating circular plate 613 is arranged in an arc shape; During the rotation of the rotating shaft 612, the rotating rotating shaft 612 drives the rotating circular plate 613 to rotate, and the moving plate 608 abuts against the sample, and the rotating circular plate 613 also abuts against the sample. When the rotating shaft 612 rotates, it will cause the rotating circular plate 613 to rotate. The rotating circular plate 613 abuts against the sample, which will cause the sample to be further horizontally stretched, reducing the occurrence of wrinkles, making it more convenient for the photographing assembly 5 to take pictures and improving the photographing effect.

[0017] Wave grooves 628 are opened on both sides inside the connecting frame 609. Mounting rods 629 are slidably connected in the two wave grooves 628. The two mounting rods 629 are fixedly connected to a plug board 616 together. An expansion rod 630 is fixedly connected to the upper side of the plug board 616. A fixed ring 631 is fixedly connected to the upper side of the expansion rod 630. Positioning rods 632 are fixedly connected to both sides of the fixed ring 631. The outer sides of the positioning rods 632 are slidably connected to a control cylinder 634. The control cylinder 634 is fixedly connected to the connecting frame 609. A third spring 633 is fixedly connected between the control cylinder 634 and the fixed ring 631; After the stretching operation is completed and the sample is removed from the clamping assembly 4, the threaded rod 43 can be rotated again to adjust the position of the clamping frame 45 until the insertion plate 616 moves to the middle position of the clamping frame 45. At this time, the working plate 3 is moved downward until the insertion plate 616 moves into the clamping frame 45. At this time, the insertion plate 616 always moves back and forth with the connecting frame 609. When the insertion plate 616 enters the clamping frame 45, the insertion plate 616 abuts against the triangular clamping plate 41, forming a slapping effect on the triangular clamping plate 41 to clean the sample that may adhere to the inner side of the triangular clamping plate 41, thereby maintaining the cleanliness of the triangular clamping plate 41. Moreover, when the insertion plate 616 abuts against the triangular clamping plate 41, the connecting frame 609 continues to move. At this time, under the blocking action of the triangular clamping plate 41, the insertion plate 616 stops moving with the triangular clamping plate 41. Therefore, the insertion plate 616 will be displaced relative to the connecting frame 609. At this time, under the limiting action of the wavy groove 628 and the mounting rod 629, the insertion plate 616 will move up and down relative to the triangular clamping plate 41. The insertion plate 616 drives the telescopic rod 630, the fixed ring 631 and the control rod 618 to move, causing the third spring 633 to deform, so as to Figure 11 Taking the direction of

[0018] In the present invention, when a tensile test operation needs to be performed on a plastic product, the cabinet servo motor is first started. The servo motor drives the ball screw to rotate. Since the working plate 3 and the bracket 2 are connected in a vertically sliding manner, the ball screw will drive the working plate 3 to move up and down until the position of the working plate 3 meets the working requirements. The prepared sample is installed in the clamping assembly 4, and the servo motor is started again to pull the plastic product to start the tensile test operation. The above are all prior arts and will not be elaborated further; When it is necessary to perform a detection operation on a plastic product, first move the working plate 3 to a suitable working position, place the detection sample between the working plate 3 and the working table 1, and rotate the threaded rod 43. Since the thread directions on both sides of the threaded rod 43 are opposite, the rotating threaded rod 43 will drive the threaded plate 44 to move towards or away from each other. Continuously rotate the threaded rod 43, and the threaded rod 43 drives the two clamping frames 45 to move through the threaded plate 44 until the distance between the two clamping frames 45 meets the working requirements. Place the sample to be detected between the two triangular clamping plates 41, start the hydraulic rod, and the hydraulic rod drives the positioning frame 46 to move downward. The positioning frame 46 drives the sliding rod 48 to move downward through the limiting rod 47. Under the limiting action of the telescopic sleeve 49, the downward moving sliding rod 48 will drive the corresponding two triangular clamping plates 41 to move towards each other until the two triangular clamping plates 41 abut against the sample, thus completing the clamping and fixing operation of the sample; During the tensile test, the upper working plate 3 drives the entire fixing frame 42 to move upward, forming a tensile effect on the sample. At the same time, start the camera 55. The camera 55 can photograph the sample and transmit the obtained data to the control center (such as a computer). Then, during the detection process, the camera 55 can perfectly transmit the changes on the surface of the sample to the control center. And during this process, the cameras 55 are evenly distributed outside the sample, and the distances between the cameras 55 are equal. Moreover, the cameras 55 will also move with the fixing frame 42, automatically adjusting the positions of the cameras 55, so as to better and more comprehensively photograph the changes of the sample, and ultimately improve the accuracy of the subsequent experimental results; After a tensile test is completed, since most plastic products have good ductility, the camera 55 cannot well observe the changes in the plastic product after being stretched. At this time, the biaxial motor 601 can be started. The biaxial motor 601 drives the reciprocating lead screw 602 to rotate. Since the collar 607 is slidably connected to the photographing assembly 5, the rotating reciprocating lead screw 602 will drive the reciprocating nut 603, the first connecting rod 604 and the moving frame 605 to move back and forth relative to the sample left and right. The moving frame 605 drives the moving plate 608, the connecting frame 609 and the control plate 610 to move back and forth left and right through the second connecting rod 606. Based on the direction of Figure 9 Among them, Figure 9 The moving plate 608, the connecting frame 609 and the control plate 610 as a whole in Figure 8 represent one of the moving plate 608, the connecting frame 609 and the control plate 610 as a whole on the left side in During the process of the moving plate 608, the connecting frame 609 and the control plate 610 moving back and forth left and right, when the moving plate 608 abuts against the sample, the moving plate 608 will cause the sample to be stretched laterally, so that the photographing assembly 5 can more clearly observe whether the sample is damaged, improving the photographing effect of the photographing assembly 5; After the moving plate 608 abuts against the sample, the moving circular plate 617 also abuts against the sample, and the moving circular plate 617 on one side is located in the edge area of the sample. When the moving plate 608 continues to move, due to the obstruction of the sample, the moving speed of the moving plate 608 will be a little slower than that of the connecting frame 609. As a result, while the first spring 611 deforms, the moving plate 608 moves relative to the connecting frame 609 to Figure 11 Based on the direction of, the moving plate 608 moves to the right relative to the connecting frame 609. At this time, since the rack 625 is fixedly connected to the connecting frame 609 through the fourth connecting rod 626, the rotating shaft 612 and the gear 624 following the movement of the moving plate 608 will rotate, that is, based on Figure 13 Based on the direction of, the rotating shaft 612 and the gear 624 will rotate counterclockwise. The rotating shaft 612 drives the control circular plate 615 and the square rod 627 to rotate counterclockwise. The square rod 627 abuts against the control rod 618, which will cause the control rod 618 and the reciprocating frame 621 to move backward. The reciprocating frame 621 drives the moving circular plate 617 to move backward through the third connecting rod 623. The reciprocating frame 621 will cause the second spring 619 to deform until the control rod 618 and the square rod 627 are disconnected. As a result, the control rod 618 and the reciprocating frame 621 as a whole move back and forth, that is, the moving circular plate 617 moves back and forth. The moving circular plate 617 abuts against the sample, which will cause the sample to move. And since the moving circular plate 617 is located at the edge of the sample, the imaging assembly 5 can better capture the changes in the edge area of the sample; During the rotation of the rotating shaft 612, the rotating rotating shaft 612 drives the rotating circular plate 613 to rotate, and the moving plate 608 abuts against the sample, and the rotating circular plate 613 also abuts against the sample. When the rotating shaft 612 rotates, the rotating circular plate 613 will rotate. The rotating circular plate 613 abuts against the sample, which will cause the sample to be further stretched horizontally, reducing the occurrence of wrinkles, making it more convenient for the imaging assembly 5 to take pictures and improving the imaging effect; After the stretching operation is completed and the sample is removed from the clamping assembly 4, the threaded rod 43 can be rotated again to adjust the position of the clamping frame 45 until the insertion plate 616 moves to the middle position of the clamping frame 45. At this time, the working plate 3 is moved downward until the insertion plate 616 moves into the clamping frame 45. At this time, the insertion plate 616 always moves back and forth following the connecting frame 609. When the insertion plate 616 enters the clamping frame 45, the insertion plate 616 abuts against the triangular clamping plate 41, forming a flapping effect on the triangular clamping plate 41 to clean the sample that may adhere to the inner side of the triangular clamping plate 41, thereby maintaining the cleanliness of the triangular clamping plate 41. Moreover, when the insertion plate 616 abuts against the triangular clamping plate 41, the connecting frame 609 continues to move. At this time, under the blocking effect of the triangular clamping plate 41, the insertion plate 616 stops moving following the triangular clamping plate 41. Therefore, the insertion plate 616 will displace relative to the connecting frame 609. At this time, under the limiting effect of the wave groove 628 and the mounting rod 629, the insertion plate 616 will move up and down relative to the triangular clamping plate 41. The insertion plate 616 drives the telescopic rod 630, the fixed ring 631 and the control rod 618 to move, causing the third spring 633 to deform, in order to Figure 11 Taking the direction of Figure 11 as the basis and taking the leftward movement of the connecting frame 609 as an example for illustration. When the connecting frame 609 drives the insertion plate 616 to move leftward, when the insertion plate 616 abuts against the connecting frame 609, the insertion plate 616 stops moving, and the connecting frame 609 continues to move leftward. The insertion plate 616 abuts against the triangular clamping plate 41 and moves up and down until the connecting frame 609 moves rightward and the insertion plate 616 disconnects from the triangular clamping plate 41. At this time, under the action of the third spring 633, the insertion plate 616 returns to its original position relative to the connecting frame 609 until the insertion plate 616 abuts against the triangular clamping plate 41 again. Thus, the cleaning effect on the triangular clamping plate 41 can be continuously formed.

Claims

1. A fully servo universal tensile material testing machine for plastic products, comprising a workbench (1), characterized in that, The workbench (1) is fixedly connected with a bracket (2), the bracket (2) is slidably connected with a working plate (3), clamping assemblies (4) are installed on the side walls of both the working plate (3) and the workbench (1), a photographing assembly (5) is installed on the clamping assembly (4), an extension assembly (6) is installed outside the photographing assembly (5), the extension assembly (6) includes four moving plates (608), the four moving plates (608) are slidably connected with a connecting frame (609), control plates (610) are fixedly connected to the four moving plates (608), a first spring (611) is fixedly connected between the control plate (610) and the connecting frame (609), the connecting frame (609) is fixedly connected with a second connecting rod (606), the second connecting rod (606) is fixedly connected with a collar (607), the collar (607) is slidably connected with the photographing assembly (5), the workbench (1) is fixedly connected with a double-shaft motor (601), output ends on both sides of the double-shaft motor (601) are fixedly connected with reciprocating lead screws (602), the reciprocating lead screws (602) are threadedly connected with reciprocating nuts (603), the reciprocating nuts (603) are fixedly connected with a moving frame (605) through a first connecting rod (604), and the second connecting rod (606) slidably penetrates through the moving frame (605).

2. The all-servo universal tensile material testing machine for plastic products according to claim 1, characterized in that, An edge convexity assembly is installed outside the connecting frame (609), the edge convexity assembly includes two moving circular plates (617), deep grooves (614) are formed on both sides of the moving plate (608), a rotating shaft (612) rotatably penetrates through the deep grooves (614), a gear (624) is fixedly connected to the rotating shaft (612), a rack (625) is fixedly connected to the connecting frame (609) through a fourth connecting rod (626), the rack (625) is meshed with the gear (624), a control circular plate (615) is fixedly connected to the rotating shaft (612), a plurality of square rods (627) are circumferentially fixedly connected to the control circular plate (615), two connecting plates (622) are fixedly connected to the moving plate (608), a square plate (620) slidably penetrates through the two connecting plates (622), a reciprocating frame (621) is fixedly connected to the square plate (620) together, a second spring (619) is fixedly connected between the reciprocating frame (621) and the connecting plates (622), two control rods (618) are fixedly connected to the reciprocating frame (621), and the reciprocating frame (621) is fixedly connected with the moving circular plate (617) through a third connecting rod (623).

3. The all-servo universal tensile material testing machine for plastic products according to claim 2, wherein A rotating circular plate (613) is fixedly connected to the rotating shaft (612) inside the deep groove (614), and the outer side of the rotating circular plate (613) is arranged in an arc shape.

4. A fully servo universal tensile material testing machine for plastic products according to claim 2, characterized in that, Both sides inside the connection frame (609) are provided with wave grooves (628). Installation rods (629) are slidably connected inside the two wave grooves (628). The two installation rods (629) are fixedly connected to a plug board (616) together. An expansion rod (630) is fixedly connected to the upper side of the plug board (616). A fixed ring (631) is fixedly connected to the upper side of the expansion rod (630). Positioning rods (632) are fixedly connected to both sides of the fixed ring (631). A control cylinder (634) is slidably connected to the outer side of the positioning rod (632). The control cylinder (634) is fixedly connected to the connection frame (609). A third spring (633) is fixedly connected between the control cylinder (634) and the fixed ring (631).

5. A fully servo universal tensile material testing machine for plastic products according to claim 1, characterized in that, The clamping assembly (4) includes two clamping frames (45). A plurality of telescopic sleeves (49) are fixedly connected inside the two clamping frames (45). Triangular clamping plates (41) are fixedly connected to the outer sides of the plurality of telescopic sleeves (49). An inclined groove is provided on the upper side of the triangular clamping plate (41). A sliding rod (48) is slidably and penetratingly connected inside the inclined groove. A limiting rod (47) is fixedly connected to the upper side of the sliding rod (48). The limiting rod (47) slidably penetrates through the clamping frame (45). The limiting rods (47) are fixedly connected to a positioning frame (46) together. A hydraulic rod is fixedly connected between the positioning frame (46) and the clamping frame (45). A threaded plate (44) is fixedly connected to the upper side of the clamping frame (45). Two fixed frames (42) are installed on the upper side of the workbench (1). One of the fixed frames (42) is fixedly connected to the workbench (1), and the other fixed frame (42) is fixedly connected to the work plate (3). Threaded rods (43) are rotatably and penetratingly connected inside the two fixed frames (42). The threaded plate (44) is threadedly connected to the threaded rod (43), and the threaded plate (44) is slidably connected to the fixed frame (42).

6. A fully servo universal tensile material testing machine for plastic products according to claim 1, characterized in that, The photographing assembly (5) includes a plurality of cameras (55) and a plurality of rotating blocks (51). The plurality of rotating blocks (51) are divided into two groups. Two rotating plates (52) are rotatably connected to the outer side of each rotating block (51). A rotating rod (53) is rotatably connected between two adjacent rotating blocks (51) in different groups. The rotating rod (53) is fixedly connected to the camera (55). The two outermost rotating plates (52) are respectively rotatably connected to the fixed frame (42). A sliding plate (54) is also fixedly connected to the outer side of the rotating rod (53). The sliding plate (54) slidably penetrates through the support (2).

7. A fully servo universal tensile material testing machine for plastic products according to claim 1, characterized in that, A plurality of shock-absorbing plates are fixedly connected to the lower side of the workbench (1).

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