Torsion angle measuring device

Abstract

The utility model relates to the technical field of torsion testing machines, and discloses a torsion angle measuring device which comprises a rotary clamping arm, a bar torsion sample, a fixed measuring arm and a scale distance ruler, and the scale distance ruler is provided with a first screw hole. According to the torsion angle measuring device, rotation of the lower surface has no influence on the torsion angle measuring device, torsion angle measurement of a single axial line on a bar torsion sample is achieved, two deep groove ball bearings and an ejector pin are adopted for clamping the bar torsion sample in the scheme, three-point clamping of the round bar torsion sample is achieved, clamping is firmer, and the clamping accuracy is improved. Three-point centering is more accurate, the device has a certain innovative design, a rolling supporting face and an ejector pin are adopted for clamping, point positioning gauge length clamping is completely achieved, the problem of gauge length uncertainty caused by the fact that an existing device adopts a wide arc face for clamping is solved, and the torsion angle measuring device is easy to operate, more accurate in torsion angle measurement and high in practicability. The method is more accurate for solving the torsional modulus, and can be widely applied to the torsion testing machine.

Description

Technical Field

[0001] The utility model relates to the technical field of torsion testing machines, in particular to a torsion angle measuring device. Background Art

[0002] The torsion angle measuring device is mainly used to accurately measure the torsion angle deformation parameters of the specimen in the torsion test of the standard metal torsion specimen and calculate the elastic modulus of the material, that is, it is used to measure the torsion angle within the torsion specimen gauge length.

[0003] However, the following problems still exist in the actual operation process: the old torsion angle measuring device under the prior art is composed of a rotating clamping arm, a locking screw, a fixed measuring arm, a gauge, a calibration block, a micrometer, etc. The old torsion angle measuring device is clamped by the entire arc surface, and the clamping surface is too wide to accurately confirm the gauge length, which affects the test results. For this reason, the utility model provides a torsion angle measuring device. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a torsion angle measuring device, which has the advantage of adopting a rolling support surface plus a thimble clamping method to achieve point positioning and gauge clamping, and effectively overcomes the problem of gauge uncertainty caused by the wide arc surface clamping of the existing devices.

[0005] The utility model provides the following technical solution: a torsion angle measuring device, comprising a rotating clamping arm, a bar torsion test specimen, a fixed measuring arm and a gauge ruler, the gauge ruler is provided with a screw hole, and the inner thread of the screw hole is connected with a mounting screw, the surface of the mounting screw is threadedly connected with a calibration block, a displacement meter is arranged on the side of the calibration block, and a fixed measuring arm is arranged on the side of the displacement meter.

[0006] Preferably, the gauge ruler is provided with a second screw hole, and the inner thread of the second screw hole is connected to a second mounting screw, and the surface of the second mounting screw is threadedly connected to a rotating clamping arm.

[0007] Preferably, a mounting hole 1 is provided at the top of the rotating clamping arm, and an ejector pin is connected to the internal thread of the mounting hole 1.

[0008] Preferably, a second mounting hole is provided on the top of the fixed measuring arm, and another set of ejector pins is connected to the inner thread of the second mounting hole.

[0009] Preferably, the side surfaces of the rotating clamping arm and the fixed measuring arm are both provided with deep groove ball bearings, and the inside of the deep groove ball bearings is provided with a rod torsion specimen.

[0010] Preferably, scale grooves are respectively provided on both sides of the upper surface of the scale ruler.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The torsion angle measuring device, in this scheme, consists of a rotating clamping arm, an ejector pin, a bar torsion specimen, a fixed measuring arm, a gauge ruler, a calibration block, a displacement meter and a deep groove ball bearing. The rotating clamping arm and the fixed measuring arm respectively clamp the two ends of the bar torsion specimen, and the gauge ruler is used to determine the gauge length of the torsion specimen. The ejector pins of the rotating clamping arm and the fixed measuring arm are locked to fix the torsion measuring device on the bar torsion specimen. The testing machine applies a load to the bar torsion specimen and drives the rotating clamping arm at one end of the specimen to rotate. At this time, an angle difference is formed between the rotating clamping arm and the fixed measuring arm, and this angle difference is the torsion angle within the gauge length. The measuring contact of the displacement meter is extended. At this time, the rotating clamping arm, the fixed measuring arm and the extension rod of the displacement meter form a triangle. The angle between the triangular rotating arm and the fixed measuring arm is calculated by the elongation of the extension rod of the displacement meter. This angle is the torsion angle within the gauge length. The upper surface of the sample is clamped by a thimble and rotates with the torsion of the bar torsion specimen. The lower surface of the bar torsion specimen is clamped by a deep groove ball bearing. The rotation of the lower surface of the bar torsion specimen is offset by the deep groove ball bearing, and the clamping arm does not rotate. The rotation of the lower surface has no effect on the torsion angle measuring device, thereby realizing the torsion angle measurement of a single axial line on the bar torsion specimen. In this scheme, two deep groove ball bearings and a thimble are used to clamp the bar torsion specimen, so as to realize three-point clamping of the round bar torsion specimen. The clamping is more firm and the three-point centering is more accurate. The device has certain innovative designs. The clamping method adopts rolling support surface plus thimble clamping, which completely realizes point positioning gauge clamping, and overcomes the gauge uncertainty problem caused by the wide arc surface clamping of the existing devices. The torsion angle measuring device is simple to operate, and the torsion angle measurement is more accurate. It is more accurate for obtaining the torsion modulus, and can be widely used in torsion testing machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model device;

[0014] Figure 2 It is a schematic diagram of the right side structure of the utility model.

[0015] In the figure: 1. Rotating clamping arm; 2. Ejector pin; 3. Bar torsion specimen; 4. Fixed measuring arm; 5. Gauge ruler; 6. Calibration block; 7. Displacement meter; 8. Deep groove ball bearing. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-2A torsion angle measuring device comprises a rotating clamping arm 1, a bar torsion specimen 3, a fixed measuring arm 4 and a gauge ruler 5. The rotating clamping arm 1 and the fixed measuring arm 4 clamp the two ends of the bar torsion specimen 3 respectively. The gauge length of the torsion specimen is determined by the calibration block 6 and the gauge ruler 5. The torsion measuring device is fixed on the bar torsion specimen 3 by locking the rotating clamping arm 1 and the thimble 2 of the fixed measuring arm 4. The testing machine applies a load to the bar torsion specimen 3 and drives the rotating clamping arm 1 at one end of the specimen to rotate. At this time, an angle difference is formed between the rotating clamping arm 1 and the fixed measuring arm 4. The angle difference is the torsion angle within the gauge length. The upper surface of the bar torsion specimen 3 is clamped by the thimble 2. The rod torsion specimen 3 rotates with the torsion of the rod torsion specimen 3, and is clamped by the deep groove ball bearing 8 on the lower surface. The rotation of the lower surface of the rod torsion specimen 3 is offset by the deep groove ball bearing 8, and the clamping arm does not rotate. The rotation of the lower surface has no effect on the torsion angle measuring device, and the torsion angle measurement of a single axial line on the rod torsion specimen 3 is realized. In this scheme, two deep groove ball bearings 8 and a thimble 2 are used to clamp the rod torsion specimen 3, so as to realize three-point clamping of the round rod torsion specimen 3, and the clamping is more firm and the three-point centering is more accurate. The device has a certain innovative design, and the clamping method adopts rolling support surface plus thimble clamping, which completely realizes point positioning and gauge clamping, and overcomes the problem of the current The existing device adopts wide arc surface clamping to solve the gauge uncertainty problem. The torsion angle measuring device is simple to operate, and the torsion angle is measured more accurately. It is more accurate for obtaining the torsion modulus, and can be widely used in torsion testing machines. The gauge ruler 5 is provided with a screw hole 1, and the internal thread of the screw hole 1 is connected with a mounting screw 1, and the surface of the mounting screw 1 is threadedly connected with a calibration block 6. A displacement meter 7 is provided on the side of the calibration block 6. The measuring contact of the displacement meter 7 is extended. At this time, the clamping arm 1 is rotated, the measuring arm 4 is fixed, and the extension rod of the displacement meter 7 forms a triangle. The angle between the triangular rotating arm and the fixed measuring arm 4 is calculated by the elongation of the extension rod of the displacement meter 7. The included angle is the torsion angle within the gauge length. A fixed measuring arm 4 is provided on the side of the displacement meter 7. The gauge ruler 5 is provided with two screw holes, and the internal thread of the screw hole is connected with two mounting screws. The surface of the mounting screw is threadedly connected with a rotating clamping arm 1. A mounting hole 1 is provided on the top of the rotating clamping arm 1, and the internal thread of the mounting hole 1 is connected with a thimble 2. A mounting hole 2 is provided on the top of the fixed measuring arm 4, and the internal thread of the mounting hole 2 is connected with another group of thimbles 2. Deep groove ball bearings 8 are provided on the sides of the rotating clamping arm 1 and the fixed measuring arm 4. A bar torsion specimen 3 is provided inside the deep groove ball bearing 8. Scale grooves are provided on both sides of the upper surface of the gauge ruler 5.

[0018] Working principle: During the operation, the operator clamps the two ends of the bar torsion specimen 3 with the rotating clamping arm 1 and the fixed measuring arm 4 respectively, determines the gauge length of the torsion specimen through the calibration block 6 and the gauge ruler 5, locks the rotating clamping arm 1 and the thimble 2 of the fixed measuring arm 4 to fix the torsion measuring device on the bar torsion specimen 3, and the testing machine applies a load to the bar torsion specimen 3, driving the rotating clamping arm 1 at one end of the specimen to rotate. At this time, the rotating clamping arm 1 and the fixed measuring arm 4 form an angle difference, which is the torsion angle within the gauge length. The measuring contact of the displacement meter 7 is extended. At this time, the rotating clamping arm 1, the fixed measuring arm 4, and the extension rod of the displacement meter 7 form a triangle. The angle between the triangular rotating arm and the fixed measuring arm 4 is calculated by the elongation of the extension rod of the displacement meter 7, and this angle is the torsion angle within the gauge length. The upper surface of the bar torsion specimen 3 is clamped by the ejector pin 2 and rotates as the bar torsion specimen 3 is twisted. The lower surface of the bar torsion specimen 3 is clamped by the deep groove ball bearing 8. The rotation of the lower surface of the bar torsion specimen 3 is offset by the deep groove ball bearing 8 and the clamping arm does not rotate. The rotation of the lower surface has no effect on the torsion angle measuring device, thereby realizing the torsion angle measurement of a single axial line on the bar torsion specimen 3. In this scheme, two deep groove ball bearings 8 and one ejector pin 2 are used to clamp the bar torsion specimen 3, so as to realize the three-point clamping of the round bar torsion specimen 3.

[0019] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A torsion angle measuring device, characterized in that: The invention comprises a rotating clamping arm (1), a bar torsion test specimen (3), a fixed measuring arm (4) and a gauge ruler (5), wherein the gauge ruler (5) is provided with a screw hole, and the inner thread of the screw hole is connected to a mounting screw, the surface of the mounting screw is connected to a calibration block (6) through a thread, a displacement meter (7) is arranged on the side of the calibration block (6), and a fixed measuring arm (4) is arranged on the side of the displacement meter (7).

2. A torsion angle measuring device according to claim 1, characterized in that: The gauge ruler (5) is provided with a second screw hole, and the interior of the second screw hole is threadedly connected to a second mounting screw, and the surface of the second mounting screw is threadedly connected to a rotating clamping arm (1).

3. A torsion angle measuring device according to claim 1, characterized in that: A mounting hole 1 is provided at the top of the rotating clamping arm (1), and a top pin (2) is connected to the inner thread of the mounting hole 1.

4. A torsion angle measuring device according to claim 1, characterized in that: A second mounting hole is provided on the top of the fixed measuring arm (4), and another set of ejector pins (2) are connected to the inner thread of the second mounting hole.

5. The torsion angle measuring device according to claim 1, characterized in that: The sides of the rotating clamping arm (1) and the fixed measuring arm (4) are both provided with deep groove ball bearings (8), and the inside of the deep groove ball bearings (8) is provided with a bar torsion test specimen (3).

6. A torsion angle measuring device according to claim 1, characterized in that: Graduation grooves are respectively arranged on both sides of the upper surface of the scale ruler (5).

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