JPH057539Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field This invention relates to a torsion angular displacement meter used in material tests, etc. conducted in a heating furnace.

B. Prior art and problems When performing a combined test such as tension, compression and torsion, or tension, compression and torsion in a heating furnace, it is necessary to take out the axial displacement and torsional angular displacement of the test piece outside the furnace. However, until now there has been no torsional angle displacement meter that can be used for this type of complex test.

The object of this invention is to provide a torsional angular displacement meter that can accurately measure the axial displacement and torsional angular displacement between gauge points of a test piece by taking it out of the furnace in the case of the above-mentioned composite test.

C. Means for Solving the Problems The torsional angular displacement meter according to this invention has a pair of gauges whose tips are removably connected to a pair of gauge points and extend in the direction of the load axis to track torsional angular displacement and axial displacement. a pair of rings arranged coaxially with the load shaft and to which the proximal ends of the respective transmission members are fixed; and rotatable balls that respectively support each ring so that they can move and rotate in the axial direction; and a torsion angle detection section that detects a relative torsion angle between the pair of rings.

D Effect The movement of the reference point is transmitted to each ring via the transmission member. Each ring rotates freely on the ball while allowing displacement in the load axis direction in accordance with the displacement of the test piece, and the torsional angular displacement of the test piece is extracted from the ring. This twist angle is detected by the detection section.

E. Embodiment An embodiment of the present invention will be explained based on FIGS. 1 to 6, which show an embodiment of the present invention.

As shown in FIG. 1, the test piece TP is attached to a fixed side grip 1 and a load side grip 2 and placed in a heating furnace 3, and a torsion angular displacement meter 50 is attached to the test piece TP from the load side. Connected.

The torsion angular displacement meter 50 includes transmission members 4A, 4B whose tips 51A, 51B are removably connected to gauge points A, B, and which extend toward the outside of the heating furnace 3 in parallel with the load-side grip 2; Each transmission member 4
The proximal ends of A and 4B are fixed, and rings 5A and 5B (hereinafter represented by reference numeral 5) through which the load-side grip 2 can be inserted, and each ring 5A and 5B are supported so as to be movable in the axial direction and rotatable. Steel balls 6A, 6B
(hereinafter represented by reference numeral 6) and roller 7A,
7B (hereinafter represented by numeral 7), etc., the torsion angle detection drums 8A and 8B (hereinafter represented by numeral 8) detect torsional angle displacement, and the non-contact type displacement detector 9 detects axial displacement. It is like that.

As shown in FIG. 2, the ring 5B is rotatably supported by a pair of balls 6B.
is rotatably supported between a pair of parallel rollers 7B, and the other ball 6B is rotatably supported between parallel rollers 7B and torsion angle detection drum 8B. This torsion angle detection drum 8B is rotatably supported by a pair of rollers 10B.
The same is true for the ring 5A side. As shown in FIG. 3, the pair of drums 8A and 8B constitute a rotary differential transformer, and the core 1 protrudes from the drum 8A.
1A is inserted into a drum 8B having a coil 11B therein, and a signal corresponding to the relative torsion between the drums 8A and 8B is extracted.

The non-contact displacement detector 9 includes an optical detector 12 equipped with a laser light source and a light-receiving element, and a reflector plate 13, which are attached to the rings 5A and 5B, respectively, and detect the distance by non-contact movement of the reflected light on the light-receiving element. It is something to do. The detector is not limited to an optical type, and may be a non-contact type detector such as a magnetic type.

As shown in FIGS. 5 and 6, ring-shaped collars 14A and 14B are formed at the marks A and B of the test piece TP, and a pair of clamping tools 15 are attached to the tip of the transmission member 4A. , 16 are firmly tightened together with bolts 18 to sandwich the collar 14A. The clamping tools 15 and 16 have V-shaped grooves 1.
7 is formed to accommodate axial displacement and torsional angular displacement. The same applies to the transmission member 4B side.

Incidentally, as shown in FIG. 2, an insertion groove 19 for the transmission member 4A is formed in the ring 5B.

In the above configuration, the axial displacement and torsional angular displacement of the test piece TP in the composite test are transmitted to the rings 5A, 5B via the transmission members 4A, 4B. At this time, as shown in Fig. 4, due to the rolling of the ball 6, the ring 5
A and 5B rotate and move in the axial direction, and a non-contact displacement detector 9 and torsion angle detection drums 8A and 8
B allows the axial displacement and torsional angular displacement to be measured independently without interfering with each other.

Note that the present invention can be applied not only to tests inside a heating furnace but also to tests inside a thermostatic chamber, outside a heating furnace, or outside a thermostatic chamber. Furthermore, the torsion angle detection is not limited to the differential transformer type, but may be other methods that do not use a pair of drums, such as one that optically detects the relative torsion angle of both rings.

F Effect of the invention According to this invention, the displacement of the test piece is transmitted to the ring via the transmission member, and this ring is made rotatable via the ball and supported without restraining its movement in the direction of the load axis. , a pair of rings rotates with low friction, allowing accurate detection of torsional displacement. Since torsional displacement and axial displacement can be measured using separate detectors, both displacements can be accurately measured without mutual interference.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an example of a torsion angle displacement meter according to this invention, Fig. 2 is a schematic diagram showing a ring support state, Fig. 3 is a partial cross-sectional view showing a torsion angle detection drum, and Fig. 4 is a schematic diagram showing an example of a torsion angle displacement meter according to this invention. FIG. 2 is a perspective view, FIG. 5 is a front view showing the connecting portion between the test piece and the transmission member, and FIG. 6 is a sectional view taken along the line -- in FIG. TP...Test piece, A, B...Gage point, 4A, 4B
...Transmission member, 5A, 5B...Ring, 6A, 6
B...Ball, 7A, 7B...Roller, 8A, 8
B...drum, 11A...core, 11B...coil.

Claims (1)

[Scope of utility model registration request] A torsion angular displacement meter used for material testing that performs a combined test of tension or compression and torsion, the tip of which is removably connected to a pair of gauge points and extends in the direction of the load axis to measure the torsional angular displacement and the axis. A pair of transmission members that follow the displacement, a pair of rings arranged coaxially with the load shaft and to which the proximal ends of the respective transmission members are fixed, and each ring supported so that it can move and rotate in the axial direction. a rotatable ball that
and a torsion angle detection section that detects a relative torsion angle between the pair of rings.