CN117990507A - Device and method for measuring neutralization length of constant-section tensile sample - Google Patents
Device and method for measuring neutralization length of constant-section tensile sample Download PDFInfo
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- CN117990507A CN117990507A CN202410261495.7A CN202410261495A CN117990507A CN 117990507 A CN117990507 A CN 117990507A CN 202410261495 A CN202410261495 A CN 202410261495A CN 117990507 A CN117990507 A CN 117990507A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000006386 neutralization reaction Methods 0.000 title claims description 16
- 238000009864 tensile test Methods 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The invention discloses a device and a method for measuring centering and length of a uniform-section tensile sample, and relates to the technical field of measurement, wherein the device comprises a platform, two photoelectric sensors, two reflecting plates, a mounting rod for mounting the sensors and the reflecting plates and a centering support arranged in the middle of the platform; the sensor mounting rods are vertically arranged at two sides of the platform at intervals, and the reflector mounting rods and the sensor mounting rods are vertically arranged on the platform in a right-over manner; the photoelectric sensor and the reflecting plate are correspondingly arranged at the equal heights of the sensor mounting rod and the reflecting plate mounting rod respectively; the two photoelectric sensors have the same structure function; the two reflecting plate structures have the same functions. The invention can solve the problems that the existing wire rod sample is required to be sheared to a state with consistent length and is strictly and centrally placed on a sample rack to normally carry out the test, the steps are complicated, and the automatic tensile test cannot be conveniently carried out, so that the timeliness of the detection work is affected.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a device for measuring neutralization length of a uniform-section tensile sample of a full-automatic tensile testing machine.
Background
In the case of beam displacement control in tensile testing, the parallel length (L c) of the test specimen, equal to the inter-clamp distance of the tester for a constant section sample, is measured to calculate the test rate v c=LC×eLc. In the existing full-automatic tensile test system, when the tensile test of the constant-section sample is carried out, the fixed-length sample is mostly adopted to determine the gap between the clamps of the tester, the sample needs to be processed until the length is consistent and placed into a sample rack, and the step of centering and measuring the length is omitted.
For the wire tensile test, because the wire delivery state is coil when sampling, the sample has obvious bending radian, and the wire tensile test is required to be carried out after straightening, and the length after straightening is difficult to be consistent. If the wire is tested in the existing mode, collision between the sample and the testing machine can occur in the process of clamping the sample when the sample is too long, and equipment is damaged; when the sample is too short, the pulled sample can not be taken out normally, and the equipment is stopped due to faults. Therefore, the existing wire rod sample must be sheared to a state with consistent length and placed on a sample rack in a strict centering mode at present to perform a test normally, the steps are complicated, and an automatic tensile test cannot be performed conveniently and rapidly, so that the timeliness of detection work is affected.
Disclosure of Invention
The invention aims to solve the technical problem of providing a centering and length measuring device and a measuring method for a constant-section tensile sample, which can solve the problems that the conventional wire sample can not normally perform the test until the wire sample is cut to a state with consistent length and is strictly centered and placed on a sample frame, the steps are complicated, and the automatic tensile test cannot be conveniently performed, so that the timeliness of the detection work is affected.
In order to solve the problems, the technical scheme of the invention is as follows: the device for measuring the neutralization length of the uniform-section tensile sample comprises a first photoelectric sensor, a first reflecting plate, a second photoelectric sensor, a second reflecting plate, a first sensor mounting rod, a first reflecting plate mounting rod, a second sensor mounting rod, a second reflecting plate mounting rod, a platform, a centering support and a base.
The platform is arranged on the base; the centering support is arranged in the middle of the platform; the first sensor mounting rod is arranged on one side of the platform, and the second sensor mounting rod is arranged on the other side of the platform; the first reflector mounting rod and the first sensor mounting rod are arranged on the same side of the platform at right intervals; the second reflector mounting rod and the second sensor mounting rod are arranged on the same side of the platform at right intervals; the first photoelectric sensor and the first reflecting plate are correspondingly arranged at the equal heights of the first sensor mounting rod and the first reflecting plate mounting rod respectively; the second photoelectric sensor and the second reflecting plate are correspondingly arranged at the equal heights of the second sensor mounting rod and the second reflecting plate mounting rod respectively.
Among the above technical schemes, the more specific scheme is: the first photoelectric sensor and the second photoelectric sensor are photoelectric sensors with the same structure and specification functions; the first reflecting plate and the second reflecting plate are reflecting plates with the same structure and specification functions; after the fixed installation, the distance between the two photoelectric sensors is L k.
Further: the top end of the centering support is provided with a V-shaped groove for stably placing a sample to be tested.
Further: one side of the base is provided with a standard sample support for placing a standard sample.
Further: the length of the first sensor mounting rod and the second sensor mounting rod is 350mm, and the length of the first reflector mounting rod and the second reflector mounting rod is 450mm.
The method for measuring the neutralization length of the constant section tensile sample pair by adopting the device for measuring the neutralization length of the constant section tensile sample pair comprises the following steps:
The first step: the clamp of the six-axis robot clamps the sample to be tested from the sample frame and then moves to the middle of the platform, so that the centers of the left and right mounting rods are overlapped with the center of the six-axis robot clamp, the height is equal to that of the photoelectric sensor and the reflecting plate, and the front and rear distances are that the sample is positioned right above the centering support.
And a second step of: the fixture of the six-axis robot clamps the sample and moves horizontally to the first photoelectric sensor on one side, when one end of the sample reaches between the first photoelectric sensor and the first reflecting plate, the first photoelectric sensor detects a signal and feeds the signal back to the controller, the six-axis robot stops, and the horizontal movement distance L 1 from the initial position to the first photoelectric sensor is recorded.
And a third step of: the clamp of the six-axis robot clamps the sample from the position where the second step stops to move to the second photoelectric sensor at the other side, when the other end of the sample reaches between the second photoelectric sensor at the other side and the second reflecting plate, the second photoelectric sensor detects a signal and feeds the signal back to the controller, the six-axis robot stops, and the moving distance L 2 is recorded.
Fourth step: the fixture of the six-axis robot moves to a position where the centers of the left mounting rod and the right mounting rod are overlapped with the center of the fixture of the six-axis robot, the fixture is vertically moved to approach to the two supports, the six-axis robot opens the fixture, a sample is placed in the V-shaped grooves of the two supports, the controller calculates L p=(L2-2L1)/2, and if L p is smaller than 0, the fixture of the six-axis robot horizontally moves a distance L p towards the direction of the first photoelectric sensor; if L p > 0, the fixture of the six-axis robot moves horizontally by a distance L p toward the second photoelectric sensor, and the sample is re-clamped after the movement, and at this time, the center of the fixture of the six-axis robot coincides with the center of the sample, namely, the centering of the sample is completed, and the length of the sample is l=l k-L2.
By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
According to the invention, the two photoelectric sensors are matched with the six-axis robot to measure the length and the centering method of the constant-section tensile sample, the constant-section sample with different lengths is not required to be sheared, and the sample is not required to be strictly centered when being placed on the sample rack, and the measurement and centering of the length of the sample can be completed only through the method and the device in the detection process, so that the detection flow is greatly simplified. In addition, the length of the sample can be accurately measured, the length measuring device can be used for calculating the distance (parallel length) between clamps and adjusting, the tensile test rate is more accurate, the centering effect is stable, the length measurement is accurate, and the accuracy and the efficiency of wire rod inspection are greatly improved.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a right side schematic view of the present invention;
FIG. 4 is a schematic top view of the present invention;
FIG. 5 is a schematic view of the positional relationship between the present invention and a six-axis robot and tensile testing machine;
fig. 6 to 11 are schematic views of the process of performing neutralization length measurement on a sample using the present invention.
The reference numerals in the figures are: 1-first photoelectric sensor, 2-first reflector, 3-second photoelectric sensor, 4-second reflector, 5-first sensor installation pole, 6-first reflector installation pole, 7-second sensor installation pole, 8-second reflector installation pole, 9-platform, 10-centering support, 11-standard sample support, 12-standard sample, 13-base, 14-six robots, 15-tensile testing machine, 16-sample.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
the device for measuring the neutralization length of the uniform-section tensile test specimen in fig. 1, 2 and 3 comprises a first photoelectric sensor 1, a first reflecting plate 2, a second photoelectric sensor 3, a second reflecting plate 4, a first sensor mounting rod 5, a first reflecting plate mounting rod 6, a second sensor mounting rod 7, a second reflecting plate mounting rod 8, a platform 9, a centering support 10 and a base 13.
The platform 9 is arranged on the base 13; the first sensor mounting rod 5 is vertically and fixedly arranged on one side of the platform 9, and the second sensor mounting rod 7 is vertically and fixedly arranged on the other side of the platform 9; the first reflector mounting rod 6 is vertically and fixedly arranged on the same side of the platform 9 opposite to the first sensor mounting rod 5 at intervals; the second reflector mounting rod 8 is vertically and fixedly arranged on the same side of the platform 9 opposite to the second sensor mounting rod 7 at intervals. The first photoelectric sensor 1 and the first reflector 2 are respectively and fixedly arranged at the equal heights of the first sensor mounting rod 5 and the first reflector mounting rod 6; the second photoelectric sensor 3 and the second reflector 4 are respectively and fixedly arranged at the equal heights of the second sensor mounting rod 7 and the second reflector mounting rod 8; the first photoelectric sensor 1 and the second photoelectric sensor 3 are photoelectric sensors with the same structure and specification functions; the first reflecting plate 2 and the second reflecting plate 4 are reflecting plates with the same structure and specification function. The length of the first sensor mounting bar 5 and the second sensor mounting bar 7 are each 350mm; the first reflector mounting bar 6 and the second reflector mounting bar 8 are each 450mm in length. As shown in fig. 6, after the installation, the center-to-center distance between the two photosensors is a fixed distance L k.
A pair of centering supports 10 are arranged in the middle of the platform 9, and V-shaped grooves are formed in the top ends of the centering supports 10 and used for placing a sample 16 to be measured during centering. A standard sample support 11 for placing a standard sample 12 is arranged on one side of the base 13, and the standard sample 12 is used for verifying whether the length measurement is accurate.
As shown in fig. 4, the whole device for measuring the neutralization length of the pair of the uniform-section tensile test samples is arranged beside the six-axis robot 14 and the tensile testing machine 15, so that the subsequent tensile test of the test samples after the neutralization length can be conveniently detected.
The neutralization length measurement steps of the equivalent section tensile sample by adopting the invention are as follows:
the first step: the clamp of the six-axis robot clamps the sample 16 to be tested from the sample rack and then moves to the middle of the platform 9, so that the centers of the left and right mounting rods coincide with the center of the six-axis robot clamp, the height is equal to that of the photoelectric sensor and the reflecting plate, and the front-rear distance is that the sample 6 is positioned right above the centering support 10; as shown in fig. 6.
And a second step of: the clamp of the six-axis robot clamps the sample 6 and moves horizontally to the first photoelectric sensor at one side, when one end of the sample reaches between the first photoelectric sensor and the first reflecting plate, the first photoelectric sensor detects a signal and feeds the signal back to the controller, the six-axis robot stops, and the horizontal movement distance L 1 from the initial position to the first photoelectric sensor is recorded; as shown in fig. 7 and 8.
And a third step of: the clamp of the six-axis robot clamps the sample from the position where the second step is stopped to move to the second photoelectric sensor at the other side, when the other end of the sample reaches between the second photoelectric sensor at the other side and the second reflecting plate, the second photoelectric sensor detects a signal and feeds the signal back to the controller, the six-axis robot is stopped, and the moving distance L 2 is recorded; as shown in fig. 9 and 10.
Fourth step: the fixture of the six-axis robot moves to a position where the centers of the left mounting rod and the right mounting rod are overlapped with the center of the fixture of the six-axis robot, the fixture is vertically moved to approach to the two supports, the six-axis robot opens the fixture, a sample is placed in the V-shaped grooves of the two supports, the controller calculates L p=(L2-2L1)/2, and if L p is smaller than 0, the fixture of the six-axis robot horizontally moves a distance L p towards the direction of the first photoelectric sensor; if L p > 0, the fixture of the six-axis robot moves horizontally by a distance L p toward the second photosensor, and the sample is again clamped after the movement, and at this time, the center of the fixture of the six-axis robot coincides with the center of the sample, i.e., the sample centering is completed, and the length of the sample is l=l k-L2,, as shown in fig. 11.
Claims (6)
1. The utility model provides a constant cross section tensile sample centering and length measurement device which characterized in that: the device comprises a first photoelectric sensor (1), a first reflecting plate (2), a second photoelectric sensor (3), a second reflecting plate (4), a first sensor mounting rod (5), a first reflecting plate mounting rod (6), a second sensor mounting rod (7), a second reflecting plate mounting rod (8), a platform (9), a centering support (10) and a base (13);
The platform (9) is arranged on the base (13); the centering support (10) is arranged in the middle of the platform (9); the first sensor mounting rod (5) is mounted on one side of the platform (9), and the second sensor mounting rod (7) is mounted on the other side of the platform (9); the first reflector mounting rod (6) and the first sensor mounting rod (5) are arranged on the same side of the platform (9) at right intervals; the second reflector mounting rod (8) and the second sensor mounting rod (7) are arranged on the same side of the platform (9) at right intervals; the first photoelectric sensor (1) and the first reflecting plate (2) are respectively and correspondingly arranged at the equal heights of the first sensor mounting rod (5) and the first reflecting plate mounting rod (6); the second photoelectric sensor (3) and the second reflecting plate (4) are correspondingly arranged at the equal heights of the second sensor mounting rod (7) and the second reflecting plate mounting rod (1).
2. The pair of neutralization length-measuring devices of constant-section tensile test specimens as set forth in claim 1, wherein: the first photoelectric sensor (1) and the second photoelectric sensor (3) are photoelectric sensors with the same structure and specification functions; the first reflecting plate (2) and the second reflecting plate (4) are reflecting plates with the same structure and specification function.
3. The pair of neutralization length-measuring devices of a constant-section tensile specimen as set forth in claim 1 or 2, characterized in that: the top end of the centering support (10) is provided with a V-shaped groove.
4. The pair of neutralization length-measuring devices of constant-section tensile test specimens as set forth in claim 3, wherein: one side of the base (13) is provided with a standard sample support (11).
5. The pair of neutralization length-measuring devices of constant-section tensile test specimens as set forth in claim 3, wherein: the length of the first sensor mounting rod (5) and the second sensor mounting rod (7) is 350mm, and the length of the first reflector mounting rod (6) and the second reflector mounting rod (8) is 450mm.
6. A method for measuring a neutralization length of a pair of uniform-section tensile specimens according to any one of claims 1 to 5, characterized by:
the measuring steps are as follows:
The first step: after a sample (16) to be measured is clamped by a clamp of the six-axis robot (14) from a sample frame, the clamp is moved to the middle of the platform (9), the centers of the left and right mounting rods are overlapped with the center of the six-axis robot clamp, the height of the left and right mounting rods is equal to that of the photoelectric sensor and the reflecting plate, and the front and rear distances are that the sample (16) is positioned right above the centering support (10);
And a second step of: the clamp of the six-axis robot clamps the sample and moves horizontally to the first photoelectric sensor at one side, when one end of the sample reaches between the first photoelectric sensor and the first reflecting plate, the first photoelectric sensor detects a signal and feeds the signal back to the controller, the six-axis robot stops, and the horizontal movement distance L 1 from the initial position to the first photoelectric sensor is recorded;
And a third step of: the clamp of the six-axis robot clamps the sample from the position where the second step is stopped to move to the second photoelectric sensor at the other side, when the other end of the sample reaches between the second photoelectric sensor at the other side and the second reflecting plate, the second photoelectric sensor detects a signal and feeds the signal back to the controller, the six-axis robot is stopped, and the moving distance L 2 is recorded;
Fourth step: the fixture of the six-axis robot moves to a position where the centers of the left mounting rod and the right mounting rod are overlapped with the center of the fixture of the six-axis robot, the fixture is vertically moved to approach to the two supports, the six-axis robot opens the fixture, a sample is placed in the V-shaped grooves of the two supports, the controller calculates L p=(L2-2L1)/2, and if L p is smaller than 0, the fixture of the six-axis robot horizontally moves a distance L p towards the direction of the first photoelectric sensor; if L p > 0, the fixture of the six-axis robot moves horizontally by a distance L p toward the second photoelectric sensor, and the sample is re-clamped after the movement, and at this time, the center of the fixture of the six-axis robot coincides with the center of the sample, namely, the centering of the sample is completed, and the length of the sample is l=l k-L2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410261495.7A CN117990507A (en) | 2024-03-07 | 2024-03-07 | Device and method for measuring neutralization length of constant-section tensile sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410261495.7A CN117990507A (en) | 2024-03-07 | 2024-03-07 | Device and method for measuring neutralization length of constant-section tensile sample |
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| Publication Number | Publication Date |
|---|---|
| CN117990507A true CN117990507A (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410261495.7A Pending CN117990507A (en) | 2024-03-07 | 2024-03-07 | Device and method for measuring neutralization length of constant-section tensile sample |
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| CN (1) | CN117990507A (en) |
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- 2024-03-07 CN CN202410261495.7A patent/CN117990507A/en active Pending
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