阅读说明：本技术 一种圆棒平直度检测装置及检测方法 (Device and method for detecting flatness of round bar ) 是由 张念 李健 罗时杰 黄国飘 饶江 凌鑫 相丞 于 2020-07-21 设计创作，主要内容包括：本发明提供一种圆棒平直度检测装置和检测方法,检测平台,用于放置待检测圆棒；第一校准样棒和第二校准样棒,平行设置于所述检测平台上表面,所述第一校准样棒和第二校准样棒均为圆棒,所述第一校准样棒和第二校准样棒的周向平直度均为0,所述第一校准样棒和第二校准样棒之间留有用于放置所述待检测圆棒的间隔；至少一个光源,沿所述间隔的长度方向设置于所述间隔的下方；所述检测平台对应于所述光源的出射光束的位置为上下贯穿的空间以便于所述光源的出射光束朝上照射所述待检测圆棒。通过采用本发明的检测装置和检测方法,配合塞尺等测量工具能够快速测量钢棒整个周向360°的平直度。(The invention provides a device and a method for detecting straightness of a round bar, wherein a detection platform is used for placing the round bar to be detected; the detection platform comprises a first calibration sample rod and a second calibration sample rod which are arranged on the upper surface of the detection platform in parallel, the first calibration sample rod and the second calibration sample rod are round rods, the circumferential straightness of the first calibration sample rod and the circumferential straightness of the second calibration sample rod are both 0, and a space for placing the round rods to be detected is reserved between the first calibration sample rod and the second calibration sample rod; at least one light source disposed below the gap along a length direction of the gap; the position of the detection platform corresponding to the emergent light beam of the light source is a space which penetrates through the detection platform from top to bottom so that the emergent light beam of the light source can upwards irradiate the round bar to be detected. By adopting the detection device and the detection method, the flatness of the steel bar in the whole circumferential direction of 360 degrees can be rapidly measured by matching with measuring tools such as a feeler gauge and the like.)

1. The utility model provides a pole straightness detection device which characterized in that: the method comprises the following steps:

the detection platform is used for placing the round bar to be detected;

the detection platform comprises a first calibration sample rod and a second calibration sample rod which are arranged on the upper surface of the detection platform in parallel, the first calibration sample rod and the second calibration sample rod are round rods, the circumferential straightness of the first calibration sample rod and the circumferential straightness of the second calibration sample rod are both 0, and a space for placing the round rods to be detected is reserved between the first calibration sample rod and the second calibration sample rod;

at least one light source disposed below the gap along a length direction of the gap; the position of the detection platform corresponding to the emergent light beam of the light source is a space which penetrates through the detection platform from top to bottom so that the emergent light beam of the light source can upwards irradiate the round bar to be detected.

2. The round bar straightness detecting apparatus as claimed in claim 1, wherein: the lengths of the first calibration sample rod and the second calibration sample rod are more than or equal to the length of the round rod to be detected.

3. The round bar straightness detecting apparatus as claimed in claim 1, wherein: the light source emits red or yellow light.

4. The round bar flatness detecting apparatus of claim 3, wherein: the light source is a projection lamp.

5. The round bar straightness detecting apparatus as claimed in claim 1, wherein: the diameter difference between the first calibration sample rod and the second calibration sample rod and the round rod to be detected is-10 mm.

6. The round bar straightness detecting apparatus as claimed in claim 1, wherein: the detection platform comprises a plurality of separated detection platforms which are arranged in parallel, and the distance between the separated detection platforms forms a space which penetrates through the detection platform from top to bottom.

7. The round bar straightness detecting apparatus as set forth in claim 6, wherein: the branch detection platform adopts a finishing platform of an iron and steel plant.

8. A method of inspecting round bar straightness using the round bar straightness inspecting device according to any one of claims 1 to 7, comprising the steps of:

(1) placing a round bar to be detected in the interval between the first calibration sample bar and the second calibration sample bar;

(2) rolling the first calibration sample rod and the second calibration sample rod until the first calibration sample rod and the second calibration sample rod are respectively attached to two sides of the round rod to be detected;

(3) the method comprises the steps of starting a light source, rolling the first calibration sample rod, the second calibration sample rod and the round rod to be detected together or rotating the round rod to be detected independently, observing whether light penetrates through two sides of the round rod to be detected, which are in contact with the first calibration sample rod and the second calibration sample rod, above the round rod to be detected by a detector, wherein the straightness of the round rod to be detected, which corresponds to the position where the light does not penetrate out, is 0, observing the position where the light penetrates out, measuring the position where the light penetrates out most, and obtaining the maximum curvature value of the round rod to be detected on the corresponding contact surface, and after the circumferential measurement of the round rod to be detected is completed, comparing the measured maximum curvature values of the contact surfaces to obtain the maximum curvature value of the circumferential direction of the round rod to be detected.

9. The method of claim 8, wherein in step (3), a feeler is used as a measuring tool when measuring.

Technical Field

The invention belongs to the field of round bar quality detection, and particularly relates to a round bar flatness detection device and a detection method.

Background

At present, a steel mill mostly uses a 1m steel ruler or a pull wire to measure the straightness of steel, and the specific operation method is as follows:

and (3) steel ruler measurement: a1 m long steel ruler is flatly placed on the surface of steel to be measured, the clearance gauge is used for measuring the maximum gap between the steel ruler and the steel to be measured, and the flatness value of the steel per meter is obtained. The method is only suitable for measuring the flatness of steel per meter, and can only measure the flatness of steel in one direction contacting with a steel ruler.

And (3) stay wire measurement: when the length of the steel is longer, a cotton thread is used as a fulcrum at two measuring ends, the cotton thread is straightened by 1 person at each of the two ends, and the gap between the steel bar and the cotton thread is measured by the feeler gauge in the middle 1 person, so that the flatness value of the steel is obtained. The method is complex to operate, needs 3 people to cooperate to complete, and has low measurement efficiency; and the cotton thread has elasticity, the measuring accuracy is low, and simultaneously, the straightness of the steel bar in one direction can be measured.

The two methods can not accurately measure the flatness of steel with high flatness requirements, and if the requirement that the integral circumferential flatness of a steel bar with the length of 3m is less than or equal to 1.5mm (namely the circumferential flatness of the steel bar at 360 degrees is less than or equal to 1.5mm/3m), the two methods can not meet the measurement requirement on the occasion with the high flatness requirement.

Chinese patent CN109974631A discloses a system and a method for detecting the straightness of a round bar, which comprises at least one straightness detection device, wherein the straightness detection device comprises a first annular rack and a second annular rack; the three lasers are uniformly distributed on the first annular rack, and when the round bar moves to the first annular rack where the lasers are distributed, the lasers emitted by the three lasers form a circular ring around the circumference of the round bar; the second annular frame is uniformly distributed with three CCD cameras for collecting images of a ring formed around the circumference of the round rod; the detection system also comprises an image processor which is used for processing the image collected by the CCD camera and analyzing the straightness of the round bar. This patent need be equipped with special straightness detection device, and equipment input cost is high, has increased the cost that the producer detected the steel straightness undoubtedly to the field operation of iron and steel manufacturing enterprise is not applicable to

Disclosure of Invention

In order to overcome the technical problem that the circumferential flatness detection is difficult to realize at low cost in the prior art, the invention aims to provide a round bar flatness detection device which is suitable for the field operation of steel and iron production enterprises;

the second objective of the present invention is to provide a method for detecting flatness of round bar;

by adopting the detection device and the detection method, the flatness of the steel bar in the whole circumferential direction of 360 degrees can be rapidly measured.

In order to achieve the first object of the present invention, the present invention provides the following technical solutions:

a round bar flatness detecting apparatus comprising:

the detection platform is used for placing the round bar to be detected;

the detection platform comprises a first calibration sample rod and a second calibration sample rod which are arranged on the upper surface of the detection platform in parallel, the first calibration sample rod and the second calibration sample rod are round rods, the circumferential straightness of the first calibration sample rod and the circumferential straightness of the second calibration sample rod are both 0, and a space for placing the round rods to be detected is reserved between the first calibration sample rod and the second calibration sample rod;

at least one light source disposed below the gap along a length direction of the gap; the position of the detection platform corresponding to the emergent light beam of the light source is a space which penetrates through the detection platform from top to bottom so that the emergent light beam of the light source can upwards irradiate the round bar to be detected.

In the round bar straightness detection apparatus, preferably, the lengths of the first calibration sample bar and the second calibration sample bar are greater than or equal to the length of the round bar to be detected.

In the round bar straightness detection device as described above, preferably, the light source emits red light or yellow light.

The round bar straightness detection device as described above, preferably, the light source is a projector.

In the apparatus for detecting straightness of a round bar as described above, preferably, the diameter difference between the first calibration sample bar and the round bar to be detected and the diameter difference between the second calibration sample bar and the round bar to be detected are between-10 mm and 10 mm.

In the round bar straightness detection device, the detection platform preferably includes a plurality of sub detection platforms which are separately arranged and parallel to each other, and the space between the sub detection platforms forms the space which penetrates through the upper part and the lower part.

The round bar straightness detection device preferably uses a finishing platform of a steel plant.

In order to achieve the second object of the present invention, the present invention provides the following technical solutions:

the method for detecting the straightness of the round bar by adopting the round bar straightness detection device comprises the following steps:

(1) placing a round bar to be detected in the interval between the first calibration sample bar and the second calibration sample bar;

(2) rolling the first calibration sample rod and the second calibration sample rod until the first calibration sample rod and the second calibration sample rod are respectively attached to two sides of the round rod to be detected;

(3) the method comprises the steps of starting a light source, rolling the first calibration sample rod, the second calibration sample rod and the round rod to be detected together or rotating the round rod to be detected independently, observing whether light penetrates through two sides of the round rod to be detected, which are in contact with the first calibration sample rod and the second calibration sample rod, above the round rod to be detected by a detector, wherein the straightness of the round rod to be detected, which corresponds to the position where the light does not penetrate out, is 0, observing the position where the light penetrates out, measuring the position where the light penetrates out most, and obtaining the maximum curvature value of the round rod to be detected on the corresponding contact surface, and after the circumferential measurement of the round rod to be detected is completed, comparing the measured maximum curvature values of the contact surfaces to obtain the maximum curvature value of the circumferential direction of the round rod to be detected.

In the method as described above, preferably, in the step (3), the feeler is used as a measuring tool when the measurement is performed.

Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:

a. the detection device can be built by utilizing the existing finishing platform, calibration sample rod, light source and other articles and facilities of the steel plant, does not need to be provided with a separate field, has less investment, is beneficial to reducing the production cost of enterprises, and is more suitable for the production field of the steel plant;

b. when the method is used for detecting the steel bar, the flatness of the steel bar in the whole circumferential direction of 360 degrees (namely the maximum curvature of the circumferential direction of the round bar to be detected) can be quickly measured only by rolling the sample bar and the round bar to be detected in consideration of the heavy characteristic of the steel bar.

c. The invention can complete detection by only 1-2 persons, has low labor cost and simple operation.

d. The invention can complete the detection of the circumferential flatness of the whole round bar and is suitable for the flatness detection with higher requirements on the flatness of the whole round bar.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:

FIG. 1 is a schematic structural diagram of a detection apparatus according to the present invention;

in the figure: 1. a first calibration sample rod; 2. detecting a round bar to be detected; 3. a second calibration sample rod; 4. a first sub-detection platform; 5. a second sub-detection platform; 6. a third detection platform; 7. a first projector; 8. and a second projector.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.

As shown in fig. 1, according to the embodiment of the present invention, a round bar straightness detection device is provided to realize straightness detection of 360 ° around the round bar, and meet detection occasions with high requirements on the straightness of the round bar. The detection device comprises:

the upper surface of the detection platform is a horizontal plane and is used for placing a round bar to be detected;

the detection platform comprises a first calibration sample rod 1 and a second calibration sample rod 3 which are arranged on the upper surface of the detection platform in parallel, wherein the first calibration sample rod 1 and the second calibration sample rod 3 are round rods, the circumferential straightness of the first calibration sample rod 1 and the circumferential straightness of the second calibration sample rod 3 are both 0, and a space for placing the round rod 2 to be detected is reserved between the first calibration sample rod 1 and the second calibration sample rod 3;

at least one light source disposed below the gap along a length direction of the gap; the position of the detection platform corresponding to the emergent light beam of the light source is a space which penetrates through the detection platform from top to bottom so that the emergent light beam of the light source can upwards irradiate the round bar 2 to be detected.

In a specific embodiment of the present invention, the lengths of the first calibration sample rod 1 and the second calibration sample rod 3 are greater than or equal to the length of the to-be-detected round rod 2, so as to achieve circumferential flatness detection of the to-be-detected round rod 2 in the whole length direction.

In the specific embodiment of the invention, the diameter difference between the first calibration sample rod 1 and the second calibration sample rod 3 and the round rod 2 to be detected is-10 mm, and the diameters of the calibration sample rod and the round rod to be detected are equivalent, so that the contact surface is more close in the rolling process, and the detection accuracy is improved; in addition, the invention is more suitable for detecting the straightness of round steel with the diameter of about 50-180 mm.

In a specific embodiment of the present invention, the light source emits red light or yellow light for the observer to observe; in a further preferred embodiment of the present invention, the light source is a projection lamp (in fig. 1, reference numerals 7 and 8 are the projection lamps), the power is selected from brightness clearly recognizable in normal daytime, and the projection lamp can adjust the irradiation angle according to the rolling range of the round bar to be detected, and has a small volume and a good lighting effect.

In a specific embodiment of the present invention, the detection platform includes a plurality of separate detection platforms (in fig. 1, reference numeral 4/5/6 denotes a separate detection platform) disposed in parallel, and a space between the separate detection platforms forms the space passing through the upper and lower portions; the separate detection platforms not only can provide a space for light rays to pass through, but also can further reduce the material input cost of the detection platforms, and the distance between the separate detection platforms can be adjusted according to actual needs; it is emphasized that even if the divided sensing platforms are separated from each other, the upper surfaces of all the divided sensing platforms must be located in the same horizontal plane, and the arrangement direction of each divided sensing platform is perpendicular to the arrangement direction of the first calibration bar 1 and the second calibration bar 3.

The method for detecting the straightness of the round bar by adopting the round bar straightness detection device comprises the following steps:

(1) placing a round bar 2 to be detected in the interval between the first calibration sample bar 1 and the second calibration sample bar 3;

(2) rolling the first calibration sample rod 1 and the second calibration sample rod 3 until the first calibration sample rod 1 and the second calibration sample rod 3 are respectively attached to two sides of the round rod to be detected 2;

(3) turning on a light source, rolling the first calibration sample rod 1, the second calibration sample rod 3 and the round rod 2 to be detected together or rotating the round rod 2 to be detected independently, observing whether light penetrates from two sides of the round rod 2 to be detected, which are in contact with the first calibration sample rod 1 and the second calibration sample rod 3, above the round rod 2 to be detected by a detector, wherein the straightness of the round rod to be detected, which corresponds to the position where the light cannot penetrate, is 0, observing the position where the light penetrates, and measuring at the position where the light penetrates most, obtaining the maximum bending value of the round bar to be detected on the corresponding contact surface, after the circumferential measurement of the round bar to be detected is completed, and comparing the measured maximum bending values of the contact surfaces to obtain the circumferential maximum bending value of the round bar to be detected (generally, the maximum bending is used as the measurement standard of the straightness).