Positioning tool for three-point bending experiment of vehicle door anti-collision beam

Abstract

The utility model discloses a vehicle door anti-collision beam three-point bending experiment positioning tool which comprises two supporting units, each supporting unit comprises a supporting seat, two supports symmetrically fixed on two sides of the supporting seat, and a transverse limiting device and a longitudinal limiting device which are installed on the two supports. The two ends of the vehicle door anti-collision beam are lapped on the supporting seats of the two supporting units respectively, and the transverse limiting device of each supporting unit is attached to the two sides of the end of the vehicle door anti-collision beam to transversely limit the vehicle door anti-collision beam; the longitudinal limiting device of each supporting unit is attached to the end face of the vehicle door anti-collision beam to conduct longitudinal limiting on the vehicle door anti-collision beam. The transverse limiting devices and the longitudinal limiting devices on the two supporting units are used for transversely limiting and longitudinally limiting the two ends of the vehicle door anti-collision beam, the positioning precision of the vehicle door anti-collision beam can be effectively improved, the vehicle door anti-collision beam can be prevented from sliding and shifting in the experiment process, and therefore the accuracy of the experiment result is improved.

Description

Technical Field

[0001] The utility model relates to an anti-collision beam positioning tooling for the three-point bending test of a car door anti-collision beam, belonging to the technical field of testing. Background Art

[0002] With the rapid development of the domestic automobile manufacturing industry, the safety of automobiles has also become the focus of social attention. An automobile body consists of thousands of parts, and only some parts such as car door anti-collision beams and reinforcement plates play the role of anti-collision and energy absorption. As the main energy-absorbing part of the car door, the car door anti-collision beam plays a crucial role in the safety of side collisions of automobiles. During the research and development of vehicle models, the detection of car door anti-collision beams is essential. Among them, the three-point bending test is one of the main means to detect the mechanical properties of car door anti-collision beams. For complex structural parts such as car door anti-collision beams, traditional bending testing machines lack a specimen positioning device, resulting in the positioning and centering of specimens before the test can only be adjusted manually, not only with poor accuracy, but also during the experiment, the specimen will slide when contacting the indenter, resulting in inaccurate experimental results. Therefore, it is very necessary to design a positioning tooling for the three-point bending test of car door anti-collision beams. Content of the Utility Model

[0003] The purpose of the utility model is to provide a positioning tooling for the three-point bending test of a car door anti-collision beam aiming at the drawbacks of the existing technology, so as to improve the positioning accuracy of the car door anti-collision beam and ensure the accuracy of experimental results.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A positioning tooling for the three-point bending test of a car door anti-collision beam includes two support units. Each support unit includes a support seat, two brackets symmetrically fixed on both sides of the support seat, and a lateral limiting device and a longitudinal limiting device installed on the two brackets. The two ends of the car door anti-collision beam are respectively placed on the support seats of the two support units. The lateral limiting device of each support unit abuts against both sides of the end of the car door anti-collision beam to perform lateral limitation on the car door anti-collision beam; the longitudinal limiting device of each support unit abuts against the end face of the car door anti-collision beam to perform longitudinal limitation on the car door anti-collision beam.

[0006] In the above-mentioned positioning tooling for the three-point bending test of a car door anti-collision beam, the lateral limiting device includes two lateral sliders, two lateral lead screws, two vertical telescopic rods and two lateral baffles. The two lateral sliders are respectively slidably installed in the horizontal lateral chutes perpendicular to the car door anti-collision beam at the tops of the two brackets. The two lateral lead screws are parallel to the lateral chutes and are respectively in threaded cooperation with the two lateral sliders. The two ends of each lateral lead screw are rotatably connected to the corresponding bracket; the upper ends of the two vertical telescopic rods are respectively fixed to the two lateral sliders, and the two lateral baffles respectively abut against both sides of the end of the car door anti-collision beam and are respectively fixed to the lower ends of the two vertical telescopic rods.

[0007] For the above-mentioned three-point bending test positioning tooling for the car door anti-collision beam, the vertical telescopic rod includes a screw rod and a sleeve. The upper end of the screw rod is connected to the transverse slider through a flange. The upper end of the sleeve is sleeved outside the screw rod and is threadedly connected to the screw rod. The lower end of the sleeve is fixedly connected to the transverse baffle through a pin.

[0008] For the above-mentioned three-point bending test positioning tooling for the car door anti-collision beam, the longitudinal limiting device includes a longitudinal baffle, two longitudinal lead screws, two longitudinal sliders and two vertical connecting rods. The two longitudinal sliders are respectively slidably installed in the longitudinal chutes parallel to the car door anti-collision beam at the lower parts of the two brackets; the two longitudinal lead screws are parallel to the longitudinal chutes and are respectively in threaded cooperation with the two longitudinal sliders. The two ends of each longitudinal lead screw are rotatably connected to the corresponding bracket; the lower ends of the two vertical connecting rods are respectively fixedly connected to the two longitudinal sliders. The middle part of the longitudinal baffle abuts against the end face of the car door anti-collision beam, and the two ends of the longitudinal baffle are respectively connected to the upper ends of the two vertical connecting rods.

[0009] For the above-mentioned three-point bending test positioning tooling for the car door anti-collision beam, the longitudinal baffle is connected to the vertical connecting rod through a locking bolt. A plurality of bolt holes matching the locking bolt are provided on each vertical connecting rod, and the plurality of bolt holes are arranged along the length direction of the vertical connecting rod.

[0010] For the above-mentioned three-point bending test positioning tooling for the car door anti-collision beam, the longitudinal baffle includes an outer baffle and an inner baffle. The two ends of the outer baffle are respectively connected to the upper ends of the two vertical connecting rods. The inner baffle is located between the outer baffle and the car door anti-collision beam and its middle part abuts against the end face of the car door anti-collision beam. The outer baffle and the inner baffle are connected by a plurality of springs.

[0011] The utility model uses the transverse limiting device and the longitudinal limiting device on the two support units to perform transverse limiting and longitudinal limiting on the two ends of the car door anti-collision beam, which can not only effectively improve the positioning accuracy of the car door anti-collision beam, but also avoid the sliding and offset of the car door anti-collision beam during the experiment, thereby improving the accuracy of the experimental results. Brief Description of the Drawings

[0012] The following further describes the utility model in detail in conjunction with the drawings and specific embodiments.

[0013] Figure 1 is a perspective view of the utility model;

[0014] Figure 2 is a top view of the utility model;

[0015] Figure 3 is Figure 2 a partial enlarged view of A in

[0016] Figure 4 isFigure 2 Partial enlarged view at B in the middle;

[0017] Figure 5 Side view of the present utility model.

[0018] The reference numerals in the figure are as follows: 1, support base; 2, bracket; 3, vertical connecting rod; 4, longitudinal baffle; 5, longitudinal lead screw; 6, transverse slider; 7, vertical telescopic rod; 8, transverse baffle; 9, longitudinal slider; 10, pressing head; 11, door anti-collision beam; 12, transverse lead screw; 4-1, outer baffle; 4-2, spring; 4-3, inner baffle. Specific embodiments

[0019] Referring to the attached Figures 1-5 , based on the existing 100T electro-hydraulic servo bending testing machine, the present utility model adds a three-point bending experiment positioning tooling for the door anti-collision beam. The positioning tooling includes two support units. Each support unit includes a support base 1, two brackets 2 symmetrically fixed on both sides of the support base 1, and a transverse limiting device and a longitudinal limiting device installed on the two brackets 2. Among them, the transverse limiting device includes two transverse lead screws 12, two transverse sliders 6, two vertical telescopic rods 7, and two transverse baffles 8; the longitudinal limiting device includes a longitudinal baffle 4, two longitudinal lead screws 5, two longitudinal sliders 9, and two vertical connecting rods 3. Both ends of the door anti-collision beam 11 are respectively placed on the support bases 1 of the two support units. The door anti-collision beam 11 is limited by the transverse limiting device and the longitudinal limiting device.

[0020] In each support unit, the two transverse sliders 6 are respectively slidably installed in the horizontal transverse chutes perpendicular to the door anti-collision beam 11 at the tops of the two brackets 2 and can slide freely along the transverse chutes. The two transverse lead screws 12 are parallel to the transverse chutes and are respectively screwed into the threaded holes on the two transverse sliders 6, that is, the two transverse lead screws 12 are respectively in threaded cooperation with the two transverse sliders 6. Both ends of each transverse lead screw 12 are rotatably connected to the corresponding bracket 2 through bearings. By rotating the transverse lead screw 12 with a handle or wrench, the transverse slider 6 can slide along the transverse chute; the upper ends of the two vertical telescopic rods 7 are respectively fixedly connected to the two transverse sliders 6, and the two transverse baffles 8 are respectively abutted against both sides of the end of the door anti-collision beam 11 and are respectively fixedly connected to the lower ends of the two vertical telescopic rods 7.

[0021] The vertical telescopic rod 7 includes a screw rod and a sleeve. The upper end of the screw rod is connected to the transverse slider 6 through a flange. The upper end of the sleeve is sleeved outside the screw rod and is threadedly connected to the screw rod. The lower end of the sleeve is fixedly connected to the transverse baffle 8 through a pin.

[0022] When conducting the three-point bending test, adjust the height of the transverse baffle 8 by rotating the sleeve so that the transverse baffle 8 is at the same height as the door anti-collision beam 11. Then adjust the position of the transverse slider 6 by rotating the transverse lead screw 12. The vertical telescopic rod 7 and the transverse baffle 8 move together with the transverse slider 6 until the four transverse baffles 8 come into contact with the door anti-collision beam 11, achieving the lateral limit of the door anti-collision beam 11.

[0023] In each support unit, two longitudinal sliders 9 are respectively slidably installed in the longitudinal chutes parallel to the door anti-collision beam 11 at the lower parts of the two brackets 2 and can slide freely along the longitudinal chutes. Two longitudinal lead screws 5 are parallel to the longitudinal chutes and are respectively screwed into the threaded holes on the two longitudinal sliders 9, that is, the two longitudinal lead screws 5 are respectively in threaded fit with the two longitudinal sliders 9. The two ends of each longitudinal lead screw 5 are rotatably connected to the corresponding brackets 2 through bearings. By rotating the longitudinal lead screw 5 with a handle or wrench, the longitudinal slider 9 can slide along the longitudinal chute; the lower ends of the two vertical connecting rods 3 are respectively fixedly connected to the two longitudinal sliders 9. The longitudinal baffle 4 is perpendicular to the door anti-collision beam 11 and its middle part abuts against the end face of the door anti-collision beam 11. The two ends of the longitudinal baffle 4 are respectively connected to the upper ends of the two vertical connecting rods 3.

[0024] The vertical connecting rod 3 is connected to the transverse slider 6 through the flange at its lower end. The longitudinal baffle 4 is connected to the vertical connecting rod 3 through a locking bolt. There are multiple (three in the figure) bolt holes on each vertical connecting rod 3 that match the locking bolt, and the multiple bolt holes are arranged along the length direction of the vertical connecting rod 3.

[0025] When conducting the three-point bending test, according to the height of the door anti-collision beam 11, connect the longitudinal baffle 4 to one of the bolt holes on the vertical connecting rod 3, adjust the longitudinal baffle 4 to a height matching the door anti-collision beam 11, and then adjust the position of the longitudinal slider 9 by rotating the longitudinal lead screw 5. The vertical connecting rod 3 and the longitudinal baffle 4 move together with the longitudinal slider 9. When the longitudinal baffles 4 in the two support units respectively come into contact with the two end faces of the door anti-collision beam 11, the longitudinal limit of the door anti-collision beam 11 is achieved, and the final positioning effect is as shown in the appendix Figure 1 shown.

[0026] After completing the lateral positioning and longitudinal limit of the door anti-collision beam 11, set the downward stroke and downward speed of the indenter 10 through a 100T electro-hydraulic servo bending testing machine, and make the indenter 10 move downward at a certain speed to achieve the three-point bending of the door anti-collision beam 11.

[0027] Both the transverse baffle 8 and the longitudinal baffle 4 have two degrees of freedom in two directions to adapt to different specimen sizes.

[0028] Refer to the appendix Figure 4, the longitudinal baffle 4 includes an outer baffle 4-1 and an inner baffle 4-3. The two ends of the outer baffle 4-1 are respectively connected to the upper ends of two vertical connecting rods 3. The inner baffle 4-3 is located between the outer baffle 4-1 and the door anti-collision beam 11 and its middle part abuts against the end face of the door anti-collision beam 11. A plurality of springs 4-2 are connected between the outer baffle 4-1 and the inner baffle 4-3. During the bending experiment, the normal rigid movement of the part can be buffered by the springs 4-2, which can effectively prevent the part from sliding and ensure that the tooling is not damaged by the rigid movement of the part.

[0029] The utility model can realize the precise positioning of the door anti-collision beam, effectively avoid the deviation of the door anti-collision beam during the experiment, and improve the reliability of the experimental results.

Claims

1. A three-point bending test positioning tooling for a car door anti-collision beam, characterized in that It includes two support units. Each support unit includes a support base (1), two brackets (2) symmetrically fixed on both sides of the support base (1), and a lateral limiting device and a longitudinal limiting device mounted on the two brackets (2). The two ends of the door anti-collision beam (11) are respectively placed on the support bases (1) of the two support units. The lateral limiting device of each support unit abuts against both sides of the end of the door anti-collision beam (11) to perform lateral limitation on the door anti-collision beam (11); the longitudinal limiting device of each support unit abuts against the end face of the door anti-collision beam (11) to perform longitudinal limitation on the door anti-collision beam (11).

2. The positioning tooling for the three-point bending experiment of a car door anti-collision beam according to claim 1, characterized in that, The lateral limiting device includes two lateral sliders (6), two lateral lead screws (12), two vertical telescopic rods (7) and two lateral baffles (8). The two lateral sliders (6) are respectively slidably mounted in the horizontal lateral chutes perpendicular to the door anti-collision beam (11) at the tops of the two brackets (2). The two lateral lead screws (12) are parallel to the lateral chutes and are respectively in threaded cooperation with the two lateral sliders (6). The two ends of each lateral lead screw (12) are rotatably connected to the corresponding bracket (2); the upper ends of the two vertical telescopic rods (7) are respectively fixedly connected to the two lateral sliders (6), and the two lateral baffles (8) respectively abut against both sides of the end of the door anti-collision beam (11) and are respectively fixedly connected to the lower ends of the two vertical telescopic rods (7).

3. A positioning tooling for the three-point bending experiment of a car door anti-collision beam according to claim 2, characterized in that, The vertical telescopic rod (7) includes a screw rod and a sleeve. The upper end of the screw rod is connected to the lateral slider (6) through a flange. The upper end of the sleeve is sleeved outside the screw rod and is in threaded connection with the screw rod. The lower end of the sleeve is fixedly connected to the lateral baffle (8) through a pin.

4. A positioning tooling for the three-point bending experiment of a car door anti-collision beam according to any one of claims 1-3, characterized in that, The longitudinal limiting device includes a longitudinal baffle (4), two longitudinal lead screws (5), two longitudinal sliders (9) and two vertical connecting rods (3). The two longitudinal sliders (9) are respectively slidably mounted in the longitudinal chutes parallel to the door anti-collision beam (11) at the lower parts of the two brackets (2); the two longitudinal lead screws (5) are parallel to the longitudinal chutes and are respectively in threaded cooperation with the two longitudinal sliders (9). The two ends of each longitudinal lead screw (5) are rotatably connected to the corresponding bracket (2); the lower ends of the two vertical connecting rods (3) are respectively fixedly connected to the two longitudinal sliders (9). The middle part of the longitudinal baffle (4) abuts against the end face of the door anti-collision beam (11), and the two ends of the longitudinal baffle (4) are respectively connected to the upper ends of the two vertical connecting rods (3).

5. The positioning tooling for the three-point bending experiment of a car door anti-collision beam according to claim 4, characterized in that, The longitudinal baffle (4) is connected to the vertical connecting rod (3) through a locking bolt. A plurality of bolt holes matching the locking bolt are provided on each vertical connecting rod (3), and the plurality of bolt holes are arranged along the length direction of the vertical connecting rod (3).

6. The positioning tooling for the three-point bending experiment of a car door anti-collision beam according to claim 5, characterized in that, The longitudinal baffle (4) includes an outer baffle (4-1) and an inner baffle (4-3). The two ends of the outer baffle (4-1) are respectively connected to the upper ends of the two vertical connecting rods (3). The inner baffle (4-3) is located between the outer baffle (4-1) and the door anti-collision beam (11) and its middle part abuts against the end face of the door anti-collision beam (11). The outer baffle (4-1) and the inner baffle (4-3) are connected by a plurality of springs (4-2).

Images