A composite core material tensile testing device

Abstract

The utility model belongs to the technical field of board tension test, especially a kind of composite core material tension testing device. The technology includes the bottom plate of horizontal arrangement, the bottom plate top is provided with two support plates, the left side support plate is fixed on the bottom plate, the support plate top is all provided with the clamping assembly for clamping core material end, the right end of right side support plate is vertically fixed with baffle, the right end of bottom plate is equipped with winder, winding has been pulled in winder, and measurement component for reading the tension value when core material breaks is arranged between pull rope and right side wall of right side support plate. In the utility model, under the action of clamping assembly, core material is fixed on support plate, and tension is provided by winding up pull rope through winder rotation, and the tension when core material breaks is read through tension sensor, or the tension is calculated by calculating the deformation variable of tension spring when core material breaks, two different tension reading modes can accurately reflect the tension size when core material breaks.

Description

Technical Field

[0001] This utility model belongs to the field of sheet metal tensile testing technology, and in particular relates to a composite material core tensile testing device. Background Technology

[0002] Composite materials utilize cutting-edge material preparation processes to scientifically proportion and fuse material components with different properties, thereby creating a completely new material system. Its matrix materials are mainly divided into metallic and non-metallic categories. Metallic matrices include metals such as aluminum, magnesium, copper, and titanium, as well as their alloys; non-metallic matrices mainly include synthetic resins, rubber, ceramics, graphite, and carbon.

[0003] Before composite core materials leave the factory, their tensile properties must be tested. Current sheet metal tensile testing equipment requires clamping both ends of the sheet metal before applying tension. Furthermore, after applying the tension using hydraulic rods, it is difficult to accurately and intuitively obtain the tensile force data borne by the core material after the test. Utility Model Content

[0004] The purpose of this invention is to provide a composite material core tensile testing device with a simple structure that accurately measures the tensile force at the time of core material fracture through two different methods.

[0005] The composite core tensile testing device includes a horizontally arranged base plate with two support plates on top. The left support plate is fixed to the base plate, and each support plate has a clamping assembly for clamping the end of the core material. A baffle is vertically fixed to the right end of the right support plate. A winder is installed on the right end of the base plate, and a pull rope is wound inside the winder. A measuring assembly for reading the tensile force value when the core material breaks is set between the pull rope and the right side wall of the right support plate.

[0006] Furthermore, the measuring component includes a tension sensor, which is installed on the right side wall of the right support plate. The baffle has a through hole that connects the left and right sides. The movable end of the pull rope passes through the through hole and is fixed to the tension sensor. A hydraulic buffer rod is horizontally fixed on the right side wall of the right support plate.

[0007] Furthermore, the measuring component also includes a sliding plate, which is vertically mounted on the right side of the baffle. The movable end of the pull rope is fixed to the sliding plate. The baffle has a through hole that connects the left and right sides, and an auxiliary pull rope is inserted through the through hole. The left end of the auxiliary pull rope is fixed to the right side wall of the right support plate, and the right end is fixed to the sliding plate. A tension spring is installed between the sliding plate and the baffle, and a buffer pad is installed on the left side wall of the baffle.

[0008] Furthermore, a sliding groove is provided on the top of the base plate, and a slider is independently installed in the sliding groove. The slider is fixed to the lower end of the right support plate. A limiting groove is provided on the groove wall, and a limiting block is independently installed in the limiting groove. The limiting block is fixed on the slider.

[0009] Furthermore, the clamping assembly includes a fixing frame, which is vertically fixed to the top of the support plate. The fixing frame has an "L" shaped structure. The horizontal section of the fixing frame has a threaded hole that is open from top to bottom. A screw rod that is threadedly fitted into the threaded hole is vertically inserted into the threaded hole. A pressure plate is provided at the lower end of the screw rod. Sub-plates are fixed at both ends of the pressure plate. The two sub-plates and the pressure plate form an "I" shaped structure.

[0010] Furthermore, the top of the pressure plate has a blind hole facing downwards, the lower end of the screw is inserted into the blind hole, a limiting groove is formed on the wall of the blind hole, and a rotating disk is independently set in the limiting groove, the rotating disk is fixed to the lower end of the screw.

[0011] Furthermore, both the pressure plate and the sub-plate have serrated protrusions at their bottoms.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the two ends of the core material are placed on top of two support plates. Under the action of the clamping assembly, the core material is fixed on the support plates. The pull rope is tightened by rotating the winder to provide horizontal tension. The tension is read by a tension sensor when the core material breaks, or the tension is calculated by calculating the deformation of the tension spring when the core material breaks. Both different tension reading methods can accurately reflect the magnitude of the tension when the core material breaks. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the second embodiment of the measurement component; Figure 3 for Figure 1 An enlarged bottom view of the intermediate pressure plate; Figure 4 for Figure 2 A magnified view of a section at point A in the middle; The components in the diagram are named as follows: 1. Base plate; 2. Support plate; 3. Fixing frame; 4. Screw; 5. Pressure plate; 6. Sub-plate; 7. Limiting block; 8. Rotary disk; 9. Slider; 10. Tension sensor; 11. Baffle; 12. Rib plate; 13. Winder; 14. Pull rope; 15. Hydraulic buffer rod; 16. Slide plate; 17. Sub-pull rope; 18. Protrusion; 19. Buffer pad; 20. Tension spring. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0015] Example 1 This embodiment describes a composite material core tensile testing device, such as... Figures 1 to 4 As shown, it includes a horizontally set base plate 1, and two support plates 2 are set on the top of the base plate 1. The left support plate 2 is fixed on the base plate 1. There are two support plates 2, both set on the top of the base plate 1. The bottom of the left support plate 2 is fixed to the left end of the base plate 1, and the right support plate 2 is in a left-right sliding fit with the top of the base plate 1. The fixing frame 3 is vertically fixed to the top of the support plate 2. The fixing frame 3 has an "L" shape structure, with the vertical section of the fixing frame 3 vertically fixed to the top of the support plate 2 and the horizontal section horizontally positioned above the support plate 2. The horizontal section of the fixing frame 3 has a threaded hole that is open vertically, and a screw 4 that is threadedly fitted into the threaded hole is vertically inserted into the threaded hole. The screw 4 is threadedly fitted into the horizontal section of the fixing frame 3. By rotating the screw 4, the lower end of the screw 4 is moved down, fixing the end of the core material to the support plate 2. A pressure plate 5 is provided at the lower end of the screw 4. Sub-plates 6 are fixed to both ends of the pressure plate 5. The two sub-plates 6 and the pressure plate 5 form an "I" shaped structure. The structure consists of two auxiliary plates 6 and a pressure plate 5 forming a clamping plate, which fixes the end of the core material to the support plate 2. This section as a whole constitutes a clamping assembly for clamping the end of the core material. When using the clamping assembly, the two ends of the core material are placed flat on the top of the two support plates 2. By rotating the screw 4, which engages with the threaded engagement of the fixing frame 3, the lower end of the screw 4 is driven to move downward, causing the pressure plate 5 and the auxiliary plates 6 to fix the end of the core material to the support plate 2. Of course, the clamping assembly can also be equipped with an electric push rod at the bottom of the horizontal section of the fixing frame 3. By extending the electric push rod, the pressure plate 5 is pressed tightly against the end of the core material, thus fixing the core material to the support plate 2. A baffle 11 is vertically fixed at the right end of the right support plate 2. When the core material breaks, the right support plate 2 is also subjected to the tension of the pull rope 14, which blocks the support plate 2 from moving to the right through the baffle 11. A winder 13 is installed at the right end of the base plate 1. A pull rope 14 is wound inside the winder 13. The winder 13 is existing technology. The winding and releasing of the pull rope 14 is controlled by rotating the winder 13. The pull rope 14 is tightened by rotating the winder 13 to provide tension for the test core material. The tension sensor 10 is mounted on the right side wall of the right support plate 2. The tension sensor 10 is existing technology and is a device that converts a physical signal into a measurable electrical signal output. It uses two tension transmission parts to transmit force. Its structure includes a force-sensitive device and two tension transmission parts. The force-sensitive device includes a piezoelectric sheet and a piezoelectric sheet pad. The latter includes a substrate portion and an edge force transmission portion. The characteristic feature is that the two ends of the two tension transmission parts are fixed together, and the force-sensitive device is clamped by the lateral action surface between the two ends. The piezoelectric sheet pad presses against the central area of ​​the piezoelectric sheet on one side, and the substrate portion is located between the piezoelectric sheet and the edge force transmission portion on the other side of the piezoelectric sheet and is in close contact with the piezoelectric sheet. The tension sensor 10 visually calculates the tensile force when the core material breaks. A through hole is provided on the baffle 11, through which the movable end of the pull rope 14 passes and is fixed to the tension sensor 10. The left end of the pull rope 14 passes through the baffle 11 and is fixed to the tension sensor 10. A hydraulic buffer rod 15 is horizontally fixed on the right side wall of the right support plate 2. The hydraulic buffer rod 15 is existing technology; also called a hydraulic damper, it is a safety buffer device that uses hydraulic damping to buffer and decelerate objects acting on it to a stop, providing a certain degree of protection and preventing damage to the mechanism from hard collisions. When the core material breaks, the right support plate 2 moves to the right... The right end of the hydraulic buffer rod 15 rests against the baffle 11, buffering the impact force between the support plate 2 and the baffle 11, thus protecting the tension sensor 10 and preventing damage to it. This section constitutes a measuring assembly for reading the tensile force value when the core material breaks. In use, the winding device 13 rotates to retract the pull rope 14, which acts directly on the tension sensor 10. When the core material breaks, the ultimate tensile force of the core material is read from the reading on the tension sensor 10. After the core material breaks, the right support plate 2 continues to move to the right, and the right end of the hydraulic buffer rod 15 rests against the baffle 11, buffering the impact force between the support plate 2 and the baffle 11. The impact received protects the tension sensor 10. Of course, the measuring component also includes a slide plate 16, which is vertically set on the right side of the baffle 11. The movable end of the pull rope 14 is fixed on the slide plate 16. After being pulled by the pull rope 14, the slide plate 16 slides left and right along the length direction of the base plate 1. The baffle 11 has a through hole that connects the left and right sides. A secondary pull rope 17 is inserted into the through hole. The secondary pull rope 17 is inserted into the through hole of the baffle 11 and moves left and right along the depth direction of the through hole. The left end of the secondary pull rope 17 is fixed to the right side wall of the right support plate 2, and the right end is fixed to the slide plate 16. One end of the secondary pull rope 17 is fixed to the right support plate 2, and the other end passes through the through hole and is fixed to the slide plate 16.A tension spring 20 is installed between the slide plate 16 and the baffle 11. The left end of the tension spring 20 is fixed to the right side wall of the baffle 11, and the right end is fixed to the left side wall of the slide plate 16. When the pull rope 14 is retracted, it pulls the slide plate 16 to move, which will cause the tension spring 20 to deform. The deformation of the tension spring 20 is calculated by multiplying it by the spring constant of the tension spring 20 to calculate the tensile force when the core material breaks. The deformation of the tension spring 20 is the length of the tension spring 20 after deformation minus the initial length of the tension spring 20. A buffer pad 19 is installed on the left side wall of the baffle 11. After the core material breaks, the support plate 2 continues to move to the right. The buffer pad 19 cushions the support plate 2, reducing the impact force on the support plate 2. When the measuring component is used in the second embodiment, the winding device 13 rotates to wind up the pull rope 14, generating a horizontal pull force to the right, which pulls the slide plate 16 to move to the right along the length direction of the base plate 1. When the slide plate 16 moves, it pulls the right support plate 2 to move through the auxiliary pull rope 17. The length of the tension spring 20 when the core material breaks is recorded, the deformation of the tension spring 20 is calculated, and multiplied by the spring constant of the tension spring 20 to calculate the tension force when the core material breaks. After the core material breaks, the right support plate 2 continues to move to the right. The buffer pad 19 cushions the support plate 2, reducing the vibration.

[0016] In the second embodiment of the measuring component, a scale line can also be provided on the front side wall of the base plate 1 on the right side of the baffle 11. The length of the tension spring 20 can be viewed intuitively through the scale line, which is beneficial for testing the maximum tensile force of the core material.

[0017] In this embodiment, the core material is placed flat on top of the two support plates 2, and the left and right ends of the core material are clamped by two clamping components. The pull rope 14 is tightened by rotating the winder 13, and the tensile force value when the core material breaks is measured by the measuring component.

[0018] Example 2 This embodiment further illustrates the technology, such as Figure 1 As shown, the bottom plate 1 has a downward-facing groove at the top, and a slider 9 is independently installed in the groove. The slider 9 is vertically installed in the groove and slides left and right along the length of the groove. The slider 9 is fixed to the lower end of the right support plate 2. When the support plate 2 moves, it drives the slider 9 to move in the groove. A limiting groove is provided on the wall of the slide, and a limiting block 7 is independently installed in the limiting groove. The limiting block 7 is fixed on the slider 9. The limiting groove and the slide together form a T-shaped slide. The T-shaped slide restricts the movement direction of the support plate 2, so that it can only move horizontally left and right at the top of the base plate 1, thereby improving the accuracy of the core material tensile test.

[0019] Example 3 This embodiment further illustrates the technology, such as Figure 1As shown, the top of the pressure plate 5 has a blind hole facing downwards, and the lower end of the screw 4 is inserted into the blind hole. A limiting groove is provided on the wall of the blind hole, and a rotating disk 8 is independently provided in the limiting groove. The rotating disk 8 is fixed to the lower end of the screw 4. By limiting the rotating disk 8 through the limiting groove, the screw 4 drives the pressure plate 5 to move while preventing the pressure plate 5 from rotating with the screw 4.

[0020] Example 4 This embodiment further illustrates the technology, such as Figure 3 As shown, the bottom of the pressure plate 5 and the sub-plate 6 are provided with serrated protrusions 18. The protrusions 18 are serrated and fixed to the bottom of the pressure plate 5 and the sub-plate 6. When the pressure plate 5 and the sub-plate 6 press on the top of the core material, they increase the friction between the pressure plate 5 and the core material and prevent the core material from slipping off the top of the two support plates 2 during the core material tensile test.

Claims

1. A composite core tensile testing device, comprising a horizontally arranged base plate (1), two support plates (2) arranged on the top of the base plate (1), the left support plate (2) being fixed on the base plate (1), characterized in that: The top of each support plate (2) is provided with a clamping assembly for clamping the end of the core material. A baffle (11) is vertically fixed at the right end of the right support plate (2). A winder (13) is installed at the right end of the bottom plate (1). A pull rope (14) is wound inside the winder (13). A measuring assembly for reading the tensile force value when the core material breaks is provided between the pull rope (14) and the right side wall of the right support plate (2).

2. The composite core tensile testing device according to claim 1, characterized in that: The measuring component includes a tension sensor (10), which is installed on the right side wall of the right support plate (2). A through hole is provided on the baffle (11) that connects the left and right sides. The movable end of the pull rope (14) passes through the through hole and is fixed on the tension sensor (10). A hydraulic buffer rod (15) is horizontally fixed on the right side wall of the right support plate (2).

3. The composite core tensile testing device according to claim 1, characterized in that: The measuring component also includes a slide plate (16), which is vertically set on the right side of the baffle (11). The movable end of the pull rope (14) is fixed on the slide plate (16). The baffle (11) has a through hole that connects the left and right sides, and a secondary pull rope (17) is inserted through the through hole. The left end of the secondary pull rope (17) is fixed on the right side wall of the right support plate (2), and the right end is fixed on the slide plate (16). A tension spring (20) is installed between the slide plate (16) and the baffle (11). A buffer pad (19) is installed on the left side wall of the baffle (11).

4. The composite core tensile testing device according to claim 1, characterized in that: The bottom plate (1) has a downward-facing groove at the top, and a slider (9) is independently installed in the groove. The slider (9) is fixed to the lower end of the right support plate (2). A limiting groove is opened on the groove wall, and a limiting block (7) is independently installed in the limiting groove. The limiting block (7) is fixed on the slider (9).

5. The composite core tensile testing device according to claim 1, characterized in that: The clamping assembly includes a fixing frame (3), which is vertically fixed to the top of the support plate (2). The fixing frame (3) has an "L" shaped structure. A threaded hole with vertical and vertical communication is opened on the horizontal section of the fixing frame (3). A screw (4) with threaded engagement is vertically inserted into the threaded hole. A pressure plate (5) is provided at the lower end of the screw (4). Sub-plates (6) are fixed at both ends of the pressure plate (5). The two sub-plates (6) and the pressure plate (5) form an "I" shaped structure.

6. The composite core tensile testing device according to claim 5, characterized in that: The pressure plate (5) has a blind hole at the top facing downwards. The lower end of the screw (4) is inserted into the blind hole. A limiting groove is provided on the wall of the blind hole. A rotating disk (8) is independently provided in the limiting groove. The rotating disk (8) is fixed to the lower end of the screw (4).

7. The composite core tensile testing device according to claim 5, characterized in that: The bottom of both the pressure plate (5) and the sub-plate (6) is provided with serrated protrusions (18).

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