JP6837722B2 - Member collision test equipment - Google Patents

Description

The present invention relates to a member collision test apparatus used for a collision performance evaluation test for each member of an automobile.

Collision performance is one of the performances required for the vehicle body of an automobile, and it is required to reduce damage to the vehicle body and protect occupants in the event of a collision. At the development and design stage of automobiles, it is indispensable to evaluate the collision performance of the vehicle body, and performance prediction is carried out by computer simulation. As a means of confirming the achievement of the desired collision performance, automobile manufacturers manufacture prototype vehicles for collision tests, and if the performance is not satisfied, take measures and remanufacture the prototype vehicle. It is necessary to carry out the collision test again, which requires a great deal of development cost and development time. In order to save such cost and time, instead of the collision performance evaluation test of the entire actual vehicle of the automobile, or as an evaluation method for improving the accuracy of the simulation, the collision performance evaluation test of a single member (hereinafter, "member"). "Crash test") has been performed conventionally. As a basic member that greatly affects the collision performance of an automobile, for example, in a side collision, a center pillar and a side sill can be mentioned. In the member collision test, a test device devised so that the performance of each of these members can be evaluated under the same conditions as when they are actually incorporated in the vehicle body (hereinafter referred to as "member collision test device") is used. Be done. Such a member collision test device includes a single or a plurality of support points for supporting a member (automotive member), a movable support portion for imparting a rotational degree of freedom and / or a translational degree of freedom to the member, and the member. On the other hand, it is provided with a resistance applying portion that imparts rotational deformation resistance and / or translational deformation resistance, and a load applying means that presses the member (see, for example, Patent Document 1).

As the load applying means, a method in which a striking tool called an impactor is mounted on a trolley to support the load so that it can go straight, and a hydraulic actuator is used to urge the load to launch the load at a high speed and launch the load is often used in the past. Has been done. The member collision test device by this method is hereinafter referred to as "conventional device".

As shown in FIG. 1, for example, the conventional device has an impactor 3 that advances to a frame body 2 that supports the member 1, a member 1 that is supported by the frame body 2, travels straight in the horizontal direction, and collides with each other. It is equipped with a dolly 3A having 3. As a drive system of the trolley 3A, for example, there is a hydraulic system, in which the hydraulic pressure accumulated at high pressure is rapidly released into the cylinder to accelerate and advance the piston 4A in a short time, and the tip of the piston 4A is placed on the back of the trolley 3A. By hitting it, only the initial speed is given to the dolly 3A to make it go straight. That is, the dolly 3A is launched at a high speed, and the piston 4A is not connected to the dolly 3A.
In this example, member 1 is a center pillar. The upper end portion and the lower end portion of the member 1 are supported by the frame body 2.

WO2011 / 016499

In the above-mentioned conventional device, the impactor is urged by a non-connected impact type actuator to launch at a high speed (for example, 5 km / h or more and 120 km / h or less), so that the initial speed of launch is low (for example, less than 5 km / h). It is difficult to control with high accuracy. On the other hand, collision performance when colliding at low speed is also listed as one of the important evaluation items, so it is necessary to evaluate with another testing machine equipped with a function to press members accurately at low speed. It is necessary to prepare the test piece separately and adjust the schedule, which is a factor that lowers the test efficiency. In addition, differences in test conditions may occur due to differences in testing machines, which may adversely affect the reliability of data. In addition, it can be said that having a low-speed test machine and a high-speed test machine respectively has a problem from the viewpoint of installation space.

In the collision performance evaluation, it is also an important evaluation item to evaluate the high-speed deformation / fracture phenomenon of the test piece, and it is equipped with a mechanism for controlling the deformation stroke, which is the distance that the impactor travels straight while pressing the member. It is desirable to be there.

In view of the above circumstances, an object of the present invention is to provide a member collision test apparatus capable of supporting a wide collision speed range, which is provided with a mechanism capable of switching the impact speed at the time of collision between high speed and low speed. To do.

The present inventor has studied in order to solve the above-mentioned problems, and as a result, the connection propulsion type actuator which is based on the conventional device and additionally connects the impactor and advances hydraulically is not connected. We came up with the idea of equipping it so that it can be switched and used with a striking actuator, and came up with the present invention. Further, the apparatus of the present invention preferably makes it possible to change the fixed position of the frame body in the straight-ahead direction of the impactor.

That is, the present invention is as follows.
(1) A member collision test device for evaluating the collision performance of an automobile member, which is an impactor that collides with a frame body that supports the member and a member that travels straight in the horizontal direction toward the member supported by the frame body. Then, the actuator that hydraulically urges the linear motion of the impactor and the impactor after colliding with the member travels straight while pressing the member, reaches a predetermined deformation stroke, and then adjusts the distance until the stop. Equipped with a damper to
As the actuator, a non-connected impact type actuator that hits hydraulically without connecting the impactor and gives only the initial velocity, and a connected propulsion type actuator that separately connects the impactor and advances hydraulically forward are used individually and by switching. A member collision test apparatus characterized in that it is provided as possible.
(2) In the above (1), the unconnected impact type actuator is assumed to cause the impactor to collide with the member at a speed of 5 km / h or more and 120 km / h or less, and the connected propulsion type actuator is the impactor. A member collision test apparatus, characterized in that the member collides with the member at a speed of 0.01 km / h or more and less than 5 km / h.
(3) In the above (1), the unconnected impact type actuator is assumed to cause the impactor to collide with the member at a speed of 5 km / h or more and 120 km / h or less, and the connected propulsion type actuator is the impactor. A member collision test apparatus, characterized in that the member collides with the member at a speed of 0.01 km / h or more and 10 km / h or less.
(4) The member collision test apparatus according to any one of (1) to (3) above, wherein the fixed position of the frame body can be changed in the straight-ahead direction of the impactor.

According to the present invention, one member collision test is a test for evaluating both high-speed and low-speed collision performance using an automobile member under the same collision conditions as when the member is incorporated in an actual vehicle. It will be possible to carry out with only the device.
Here, "high speed" means that the collision speed is 5 km / h or more and 120 km / h or less, and "low speed" means that the collision speed is 0.01 km / h or more and less than 5 km / h.
Further, there are various methods for evaluating "collision performance", but the maximum load value, the absorbed energy amount obtained by integrating the load with the stroke amount, or the average load up to a predetermined stroke amount can be evaluated. The member collision test apparatus according to the above can measure a load of up to 200 tons.

It is a schematic perspective view which shows the example of the conventional apparatus. It is a schematic perspective view which shows an example of the apparatus of this invention. It is a schematic perspective view which shows an example of the apparatus of this invention. It is a schematic plan view which shows another example of the apparatus of this invention. It is a schematic perspective view which shows the function of a damper.

As illustrated in FIGS. 2 to 4, the member collision test apparatus according to the present invention (hereinafter referred to as “the apparatus of the present invention”) includes a frame body 2 that supports the member 1 and a member 1 that is supported by the frame body 2. The impactor 3 that travels straight in the horizontal direction and collides, and the unconnected impact type actuator 4 that gives only the initial speed by hitting hydraulically without connecting the impactor 3 as an actuator that hydraulically urges the straight movement of the impactor 3 ( FIG. 3 shows only the piston 4A of the unconnected impact type actuator 4), which is the same as that of the conventional device. However, in the apparatus of the present invention, a connected propulsion type actuator 6 for connecting the impactor 3 and advancing it hydraulically, which is not available in the conventional device as an actuator for hydraulically urging the linear motion of the impactor 3, is a non-connected impact type actuator. The feature is that it is equipped so that it can be switched to and used with 4. The connection propulsion type actuator 6 is arranged on both sides of the impactor straight line X from the piston 4A (of the non-connection impact type actuator 4) to the member 1 support portion so as not to obstruct the passage of the impactor 3, as a connection method. For example, the impactor can be fastened to the back side of the impactor 3 by the upper and lower holding type connecting portion 6B provided at the tip of the piston 6A (of the connecting propulsion type actuator 6) or by the left and right holding type connecting portion 6C. 3 and the connection propulsion type actuator 6 can be connected and advanced. Fastening methods include bolt fixing and pin insertion. Further, it is desirable that the tip portion of the pressing rod 3B that comes into contact with the member 1 is replaceable, and the shape of the indenter that presses the member can be changed.

The forward speed condition is the actual collision speed regardless of the target value within the range of 0.01 km / h or more and less than 5 km / h, which is wider than the collision speed range in the low-speed collision test of the actual vehicle. It is preferable that the conditions can be controlled within the target value of ± 5%. This low-speed (0.01 km / or more and less than 5 km / h) forward speed condition is difficult to achieve with the unconnected impact type actuator 4 that gives the impactor 3 the initial speed, but the connected propulsion that connects and advances the impactor 3 In the type actuator 6, this can be easily achieved by making the hydraulic mechanism a specification that satisfies the low forward speed condition.

In the connected propulsion type actuator 6, for example, even in a collision speed condition of 5 km / h or more and 10 km / h or less, which is on the relatively low speed side even in the high speed range, the controllability of the speed of the impactor 3 is unconnected. It can be configured to be about the same as the mold actuator 4. The articulated propulsion actuator 6 thus configured can cause the impactor 3 to collide with the member 1 at a speed of 0.01 km / h or more and 10 km / h or less, and therefore, from low speed to high speed on the relatively low speed side (5 km). When attempting to carry out a member collision test under a collision speed condition of / h or more and 10 km / h), it is possible to carry out the member collision test without switching from the connected propulsion type actuator 6 to the unconnected striking type actuator 4.

FIG. 4 is a schematic plan view showing another example of the apparatus of the present invention. FIG. 4A shows a high-speed mode, and FIG. 4B shows a low-speed mode. The member installation area 10 is a place where the member 1 is installed, and the maximum length (length in the straight direction of the impactor) × width × height is 2000 m × 2000 m × 2000 m. In the example of FIG. 4, in the example of FIG. 3, the left and right holding type connecting portion 6C was used instead of the upper and lower holding type connecting portion 6B. The left and right sandwich type connecting portions 6C are arranged at the tip portions of the left and right pistons 6A, and have a connecting structure in which the pistons 6A are rotated 90 ° to face each other and fastened to the back surface side of the impactor 3. Examples of the fastening method include bolt fixing and pin insertion. According to the connection structure of FIG. 4, the connection can be released relatively easily as compared with the case of FIG. 3 (that is, the connection portions 6C are rotated by 90 ° 15 in the opposite directions to each other. It is also preferable from the point of view that the connection can be released only by itself.

In FIGS. 2 to 4 and FIG. 5 described later, the damper 5 is attached to the impactor 3 facing side of the frame 7, for example, as shown in FIG. 3, but is not limited to this, as shown in FIG. 5, for example. , The damper 5 may be attached to the side of the impactor 3 facing the frame 7.

FIG. 5 is a schematic perspective view showing the function of the damper 5. The damper 5 is the impactor 3 traveling straight while pressing the member 1 from the time when the impactor 3 collides with the member 1 supported by the frame body 2 (not shown in FIG. 5) (FIG. 5 (a)). (FIG. 5 (b)), when the damper 5 and the frame 7 come into contact with each other, the impactor 3 is decelerated and stopped (FIG. 5 (c)). The damper 5 is, for example, a tubular circular tube, and by changing the material or shape, the pressing rod 3B at the tip of the impactor 3 collides with the member 1 and adjusts the stopping distance from the time when a predetermined deformation stroke is reached. It is possible to do. The stopping distance is preferably 100 mm or less.

Further, in order to adjust the deformation stroke of the member 1 at the time of collision, a form in which the fixed position of the frame body 2 can be changed in the straight-ahead direction of the impactor 3 is preferable. The settable range of the deformation stroke is preferably 1 mm or more and 500 mm or less so as to cover the collision conditions of the actual vehicle. Furthermore, the process of pressing and deforming the member is taken by a single high-speed camera 20 (FIG. 2) arranged in a single unit or in a plurality of different directions to record an image, and the deformed behavior of the member is used using the recorded image. Is more desirable to analyze.

By performing a member collision test using the above-mentioned apparatus of the present invention, a member collision test under a wide range of collision speed conditions from a low speed of 0.01 km / h or more and less than 5 km / h to a high speed of 5 km / h or more and 120 km / h or less. Can be carried out with one member collision test device.

1 Member 2 Frame 3 Impactor 3A Bogie 3B Pressing rod X Impactor Straight line 4 Unconnected impact type actuator 4A Piston (Piston of unconnected impact type actuator)
5 Damper 6 Connected propulsion actuator 6A Piston (Piston of connected propulsion actuator)
6B connecting part (upper and lower holding type)
6C connecting part (left and right sandwich type)
7 Frame 10 Member installation area 15 90 ° rotation 20 High-speed camera

Claims (4)

A member collision test device for evaluating the collision performance of a member of an automobile, the frame body supporting the member, the impactor traveling straight in the horizontal direction toward the member supported by the frame body, and the impactor. An actuator that hydraulically urges the straight-moving motion of the impactor, and a damper that adjusts the distance from when the impactor hits the member to go straight while pressing the member to reach a predetermined deformation stroke and then stop. With
As the actuator, a non-connected impact type actuator that hits hydraulically without connecting the impactor and gives only the initial velocity, and a connected propulsion type actuator that separately connects the impactor and advances hydraulically forward are used individually and by switching. A member collision test apparatus characterized in that it is provided as possible. The unconnected impact type actuator causes the impactor to collide with the member at a speed of 5 km / h or more and 120 km / h or less, and the connected propulsion type actuator causes the impactor to collide with the member at 0.01 km / h. The member collision test apparatus according to claim 1, wherein the collision is performed at a speed of 5 km / h or more. The unconnected impact type actuator causes the impactor to collide with the member at a speed of 5 km / h or more and 120 km / h or less, and the connected propulsion type actuator causes the impactor to collide with the member at 0.01 km / h. The member collision test apparatus according to claim 1, wherein the collision is performed at a speed of 10 km / h or less. The member collision test apparatus according to any one of claims 1 to 3, wherein the fixed position of the frame body can be changed in the straight-ahead direction of the impactor.

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