JP2567572Y2 - Hopkinson Bar Testing Equipment Bar Support Equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar support device for a Hopkinson bar test device.

[0002]

2. Description of the Related Art A Hopkinson pressure bar test apparatus manufactured using a compression type Hopkinson bar and measuring a dynamic stress-strain relationship has an acceleration cylinder 1 horizontally arranged as shown in FIGS. An input rod 3 and an output rod 4 sandwiching a test piece 2 are arranged at a position slightly away from the acceleration cylinder 1 on an extension of one end side of the acceleration cylinder 1, and further at a position slightly away from the output rod 4. A shock-absorbing rod 5 is arranged, and a shock-absorbing device 6 is arranged at a position slightly away from the shock-absorbing rod 5. Further, at the other end of the accelerating cylinder 1, a striker 7 is loaded into the accelerating cylinder 1. A loading device 8 is provided, and an air storage tank 10 is connected to the loading device 8 via an electromagnetic valve 9. Each of the acceleration cylinder 1, the input rod 3, the output rod 4, and the buffer rod 5 is provided. Are linearly supported on the measuring table 12 by the rod supporting device 11. Reference numeral 13 denotes a base.

In the Hopkinson bar test apparatus, the electromagnetic valve 9 is opened and the compressed gas in the gas storage tank 10 is supplied from the loading device 8 to the acceleration cylinder 1 with the striker 7 loaded into the acceleration cylinder 1 from the loading device 8 portion. Then, the striker 7 accelerated by the compressed gas collides with the input rod 3 and stops, and the collision force at this time compresses the test piece 2 and is transmitted to the output rod 4, and the output rod 4
Moves and collides with the shock-absorbing rod 5 and stops, and the shock-absorbing rod 5 moved by the collision collides with the shock-absorbing device 6 and stops. At the positions of the acceleration cylinder 1 and the output rod 4 on the input rod 3 side, a speedometer 14 for measuring the speed or the transit time of the striker 7 or the input rod 3 and the output rod 4 by light is provided. A semiconductor strain gauge 15 for measuring a propagating strain pulse (longitudinal elastic wave) is attached near both ends of each of the output rods 4, and the detected values from the speedometer 14 and the semiconductor strain gauge 15 are subjected to impact response measurement. The dynamic stress-strain of the test piece 2 is calculated and output to the section 16.

In the above Hopkinson bar test apparatus,
It is necessary to accurately support the accelerating cylinder, the input rod, the output rod, and the buffer rod on one axis. For this reason, conventionally, as shown in FIGS. 5 and 6, a support block 21 having an upwardly open V-groove 20 is fastened to a block support 19 fixed at a right angle on a fixing plate 17 and formed with a recess 18. Rod support device 11 mounted so as to be adjustable in position via bolts 22
The rod support device 11 is mounted on the measuring table 12 with fixing bolts 24 to support the acceleration cylinder 1, the input rod 3, the output rod 4, and the buffer rod 5. The support block 21 has the fastening bolt 22
Since the mounting hole 23 having a diameter larger than the diameter of the support block 2 is formed,
1 can be adjusted and fixed.

[0005]

However, in the rod support device 11 of the above-mentioned conventional Hopkinson bar test device, the support block 21 is moved up, down, left and right while being supported by hand, and is fixed by the tightening bolt 22. Therefore, the adjustment work for accurately supporting the acceleration cylinder 1, the input rod 3, the output rod 4, and the shock-absorbing rod 5 on one axis is very difficult, and there is a problem that the work requires a long time. Was.

Further, since the V-groove 20 is opened upward, the support block 21 is used when the acceleration cylinder 1, the input rod 3, the output rod 4, and the buffer rod 5 move at high speed.
Had the risk of jumping out of

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional apparatus, and facilitates the operation of accurately positioning the accelerating cylinder, the input rod, the output rod, and the shock-absorbing rod on one axis, and has a high safety. It is an object of the present invention to provide a bar support device of a Hopkinson bar test device capable of increasing the pressure.

[0008]

According to the present invention, there is provided a block support having a U-shaped notch fixed at a right angle on a fixing plate and opened upward, and is mounted on a front surface of the block support so as to be adjustable in position. A lower block having an upward V-groove opened upward corresponding to the position of the U-shaped notch; and a projection-preventing upper block adapted to be mounted above the lower block on the front surface of the block support. And a lower block position adjuster mounted on the fixing plate so as to receive the lower surface of the lower block.

[0009]

[Function] When the rod support device of the present invention supports the accelerating cylinder, input rod, output rod and buffer rod of the Hopkinson bar test device, the horizontal position is adjusted while finely adjusting the vertical position of the lower block with the position adjuster. Then, the acceleration cylinder, the input rod, the output rod, and the buffer rod are positioned on one axis. Further, the upper block is fixed to the block support so as not to contact the input rod, the test piece, the output rod, and the buffer rod, and the input rod, the output rod, and the buffer rod do not fly out of the supported state during the impact test. To do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention applied to the Hopkinson bar test apparatus shown in FIGS. 3 and 4, which can be fixed on a measuring table 12 via fixing bolts 24. FIG. On the fixing plate 17, a plate-shaped block support 27 having a U-shaped notch 26 fixed at a right angle (vertically) to the fixing plate 17 and opened upward is provided.

A lower block 29 is attached to the front surface of the block support 27 by a tightening bolt 28. The lower block 29 has an upward V-shaped groove 30 that opens upward corresponding to the position of the U-shaped notch 26 of the block support 27. Since the mounting hole 25 formed in the block 29 is formed larger than the diameter of the tightening bolt 28, the lower block 29 is mounted on the block support 27 so as to be adjustable in a vertical plane. The upward V-groove 30 is provided with a sliding member 31 such as Teflon having a small friction coefficient so as not to restrict the movement of the input rod 3, the output rod 4 and the buffer rod 5 to be supported.

Further, two adjustment bolts 32 (position adjustment tools) for receiving the lower surface of the lower block 29 and adjusting the height position of the lower block 29 are provided directly below the lower block 29 on the fixing plate 17. Provide.

The lower block 29 is provided above the lower block 29 on the front surface of the block support 27.
9 has a downward V-groove 33 opened downward so as to face the upward V-groove 30.
The rod support device 36 is mounted so that its position can be adjusted by tightening bolts 35 similarly to the lower block 29.

In order to support the acceleration cylinder 1, the input rod 3, the output rod 4, and the shock-absorbing rod 5 of the Hopkinson rod test apparatus by the rod support device 36, the acceleration cylinder 1, the input rod 3, and the output rod 4 are required.
The fixing plate 17 of the rod support device 36 to which the lower block 29 is attached is fixed to a predetermined position of the measuring table 12 supporting the buffer rod 5 with the fixing bolt 24, and then the vertical position of the lower block 29 is adjusted by the adjusting bolt 32. The position of the acceleration cylinder 1, the input rod 3,
In order to support the output rod 4 and the buffer rod 5 on one axis,
The lower block 29 is fixed to the block support 27 by a fastening bolt 28.

Next, the acceleration cylinder 1, the input rod 3, the output rod 4, and the buffer rod 5 are placed in the upward V-grooves 30 of each lower block 29 of the rod support device 36.

Further, a rod support device 36 for supporting the input rod 3, the output rod 4 and the shock-absorbing rod 5, which move during the impact test,
The upper block 34 is fixed to the block support 27 by a tightening bolt 35 with a slight gap opened so as not to contact the input rod 3, output rod 4 and buffer rod 5. The rod 4 and the buffer rod 5 are prevented from flying out of the supported state.

As described above, when the position of the lower block 29 is adjusted, the horizontal position is adjusted while finely adjusting the vertical position of the lower block 29 with the adjustment bolt 32. The work of positioning and fixing with high accuracy becomes easier as compared with a method of adjusting the position and fixing while supporting only with the hand.

Further, an upper block is provided on a rod support device 36 for supporting the input rod 3, the output rod 4 and the buffer rod 5 which move during the impact test so as not to contact the input rod 3, the output rod 4 and the buffer rod 5. 34 is fixed to the block support 27 via a fastening bolt 35. Thus, the upper block 34
Is attached, the input rod 3, the output rod 4, and the shock-absorbing rod 5 are prevented from jumping out of the supported state to the outside during the impact test, and safety is enhanced.

The present invention is not limited to the above embodiment. The upper block is not formed so as to be adjustable in position, and the downward V-groove is formed so as to be large so as not to contact the input rod or the like. That the shape of the upper block can be variously changed as long as it can prevent the projection of the input rod, etc., that the position adjuster can be anything other than bolts, and other points of the present invention. Of course, various changes can be made without departing from the scope.

[0021]

According to the rod support device of the present invention, when the acceleration cylinder, the input rod, the output rod, and the buffer rod of the Hopkinson rod test device are supported on one axis, the vertical position of the lower block is finely adjusted by the adjusting tool. Since the lateral position can be adjusted in this state, the operation of supporting the acceleration cylinder, the input rod, the output rod, and the shock-absorbing rod on one axis with high accuracy can be performed easily and quickly. Also, since the upper block is provided with a block support so as not to come into contact with the input rod, the test piece, the output rod, and the buffer rod, the input rod, the output rod, and the buffer rod are removed from the state where the input rod, the output rod, and the buffer rod are It is possible to obtain an excellent effect such as that it is possible to prevent flying out of the vehicle and enhance safety.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is an overall side view showing an example of a Hopkinson bar test apparatus.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a front view showing an example of a bar support device provided in a conventional Hopkinson bar test device.

FIG. 6 is a view taken in the direction of arrows VI-VI in FIG. 5;

[Explanation of symbols]

 17 Fixing plate 26 U-shaped notch 27 Block support 28 Tightening bolt 29 Lower block 30 Upward V-groove 32 Adjusting bolt (position adjusting tool) 34 Upper block 35 Tightening bolt 36 Bar support device

Claims (1)

(57) [Scope of request for utility model registration] 1. A block support having a U-shaped notch fixed at a right angle on a fixed plate and opened upward, and is mounted at the front surface of the block support so as to be position-adjustable and positioned at the U-shaped notch. A lower block having an upwardly directed V-groove correspondingly opened upward, an upper block for preventing protrusion which is mounted on the upper side of the lower block on the front surface of the block support, and the lower block on the fixing plate. A rod support device for a Hopkinson bar test device, comprising: a lower block position adjuster mounted to receive a lower surface of the block.