CN113546987A - Online detection device and online detection method for straightness of bar - Google Patents
Online detection device and online detection method for straightness of bar Download PDFInfo
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- CN113546987A CN113546987A CN202110951943.2A CN202110951943A CN113546987A CN 113546987 A CN113546987 A CN 113546987A CN 202110951943 A CN202110951943 A CN 202110951943A CN 113546987 A CN113546987 A CN 113546987A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention relates to the technical field of bar detection, and particularly provides an on-line bar straightness detection device and an on-line bar straightness detection method; the online detection device comprises a base, a material blocking device, a plurality of fixed supporting beams, a floating detection beam, a displacement sensing module and a controller; each fixed supporting beam is respectively connected with the base, and all the fixed supporting beams form a blanking inclined plane together; the material blocking device is positioned above the blanking inclined plane; all the floating detection beams are arranged side by side; each floating detection beam is respectively connected with the fixed support beam in a vertical sliding manner, and an elastic element is arranged between each floating detection beam and the fixed support beam; the upper end face of the floating detection beam is higher than the upper end face of the fixed support beam. The on-line detection device fully utilizes the space between the discharging position of the device and the blanking area, has compact structure, realizes on-line detection of the straightness of the bar while blanking, saves detection time, improves processing efficiency and has high detection accuracy.
Description
Technical Field
The invention relates to the technical field of bar detection, in particular to an on-line bar straightness detection device and an on-line bar straightness detection method.
Background
In the bar straightening operation, aiming at some products with higher requirements, straightness detection needs to be carried out on the straightened bar so as to ensure that the bar has good straightness; if the straightness is not qualified, straightening is needed again.
The current common method for measuring straightness mainly comprises the following steps: 1) manual visual inspection; 2) manual measurement is carried out by using tools such as a flat ruler or a dial indicator; 3) and transferring the straightened bar to a special straightness measuring device for measurement. The former two detection methods depend on the experience of workers excessively, and for parts with unobvious curvature, the parts are difficult to distinguish by naked eyes and easy to miss detection, and the reliability of a detection result is difficult to guarantee. Compared with the former two detection methods, the third method is more reliable, and usually adopts some contact or non-contact sensors to collect the shape data of the bar to be detected, but the detection process of the method is more complicated, time-consuming, and needs additional cost investment, and is not suitable for occasions with fast straightening rhythm and higher requirement on automation degree. The three methods are only suitable for off-line detection, the straightness detection in the full-length range is difficult to achieve, the production continuity and the production rate are affected, and the off-line detection cannot reflect the straightening quality in time, so that the rejection rate is increased. Further, there is also an on-line straightness measuring device installed near the outlet of the leveler, but the detection effect is not satisfactory due to the difference in the detection method.
Aiming at the problems, a device and a method for detecting the straightness of the bar are needed to be designed to realize the on-line automatic detection of the full-length straightness of the bar, so that the straightening production efficiency and the finished product detection accuracy are improved, and the labor intensity of workers is reduced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an online detection device for the straightness of a bar and an online detection method thereof; the on-line detection device fully utilizes the space between the discharging position of the device and the blanking area, has compact structure, realizes on-line detection of the straightness of the bar while blanking, saves detection time, improves processing efficiency and has high detection accuracy.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a bar straightness accuracy on-line measuring device which characterized in that: the method comprises the following steps:
a base;
the material blocking device is used for blocking the front part of the bar material blanking direction in the bar material blanking process so as to limit the bar material blanking speed;
a plurality of fixed supporting beams for supporting the bar material to roll and blanking;
the floating detection beams are used for floating up and down under the action of the gravity of the bar material, and the number of the floating detection beams is the same as that of the fixed support beams;
the displacement sensing module is used for respectively detecting the up-and-down floating displacement of each floating detection beam;
and a controller;
each fixed supporting beam is respectively connected with the base, and all the fixed supporting beams form a blanking inclined plane together; the material blocking device is positioned above the blanking inclined plane; all the floating detection beams are arranged side by side, and a space exists between every two adjacent floating detection beams; each floating detection beam is respectively connected with the fixed support beam in a vertical sliding manner, and an elastic element is arranged between each floating detection beam and the fixed support beam to realize elastic reset of each floating detection beam; the upper end surface of the floating detection beam is higher than the upper end surface of the fixed support beam; an included angle alpha exists between the floating detection beam and the blanking direction; the controller is respectively in signal connection with the material blocking device and the displacement sensing module.
The working principle of the on-line detection device is as follows: the bar material rolls on the blanking inclined plane and falls down; in the process of falling of the bar in a rolling manner, the material blocking device is blocked in front of the bar blanking direction, so that the central axis of the bar is kept vertical to the blanking direction, and the bar blanking speed is limited; because an included angle alpha exists between the floating detection beam and the blanking direction, the contact track of the bar and the floating detection beam is a spiral line around the bar; under the action of the pressure of the bar, the contact tracks of the floating detection beams are respectively attached to the bar and float up and down along with the bending degree of the bar, the elastic elements can ensure that the floating detection beams are attached to the bar, and the displacement sensing module acquires the up-and-down floating displacement of the floating detection beams, so that the straightness of the bar is detected.
The online detection device can be arranged between the discharging position of the equipment and the blanking area, fully utilizes the space between the discharging position of the equipment and the blanking area, and has compact structure; the on-line detection of the straightness of the bar is realized while blanking, the detection time is saved, and the processing efficiency is improved. The floating detection beams are obliquely arranged along the blanking direction, so that the floating detection beams can be in contact with different positions of the bars in the length direction in the bar blanking process, the contact tracks are spiral lines around the bars, the straightness of more areas of the bars is detected, and the straightness judgment accuracy of the bars is improved.
Preferably, the value range of the length L of the floating detection beam is as follows: l is more than or equal to S/sin alpha; wherein S represents the spacing between adjacent floating detection beams. The value range of the length L of the floating detection beam enables the tail of the previous floating detection beam to be connected with the head of the next floating detection beam in a projection head-tail mode on a plane perpendicular to the blanking direction, so that all positions in the full-length range of the bar can be effectively detected, and straightness detection in the full-length range of the bar is achieved.
Preferably, the fixed support beam comprises a fixed support frame and a fixed beam body arranged on the fixed support frame; the floating detection beam comprises a floating support frame and a floating beam body arranged on the floating support frame; the fixed support frame and the floating support frame can be connected in a vertical sliding manner; the elastic elements are a plurality of elastic elements arranged between the fixed support frame and the floating support frame.
Preferably, the fixed support frame is connected with a plurality of connecting pieces; each connecting piece is provided with a through hole; the floating detection beam also comprises a plurality of connecting columns and a detection plate; the number of the connecting columns is matched with that of the connecting pieces; one end of each connecting column is connected with the floating support frame, and the other end of each connecting column penetrates through the through hole of the connecting piece to be connected with the detection plate; each elastic element is sleeved outside the connecting column, and two ends of each elastic element are respectively abutted against the connecting piece and the floating support frame; the detection plate corresponds to the displacement sensing module in position.
And the displacement of the detection plate is detected through the position of the displacement sensing module, so that the displacement detection of the floating detection beam is realized, and the straightness of the contact position of the bar is obtained. The floating detection beam with the structure can realize different up-and-down floating along with the bending degree of the bar, and is convenient for displacement detection of the displacement sensing module.
Preferably, a positioning screw rod is further arranged between the fixed support frame and the floating support frame, and the position between the fixed support frame and the floating support frame is adjusted by adjusting the extension length of the positioning screw rod. The positioning screw rod is arranged between the fixed support frame and the floating support frame in a propping mode, and the position between the fixed support frame and the floating support frame can be adjusted by adjusting the extending length of the positioning screw rod, so that the height difference adjustment of the upper end face of the floating detection beam and the upper end face of the fixed support beam is realized.
Preferably, the fixed support frame and the floating support frame are connected in a vertically sliding mode through a linear guide rail and a sliding block.
Preferably, the material blocking device comprises more than two material blocking arms arranged side by side and a material blocking piece; each material blocking part is arranged below the material blocking arm through a material blocking driving mechanism respectively so as to realize the reciprocating movement of the material blocking parts along the blanking direction.
Preferably, the material blocking driving mechanism comprises a motor, a connecting rod and a plurality of chain transmission assemblies; each material blocking piece is connected below each chain transmission assembly respectively, and each chain transmission assembly is connected with the motor through a connecting rod. The chain transmission assembly drives the material blocking part to move to the tail end of the chain transmission assembly, and the straightness of the bar is judged in the process; when the straightness of the bar is judged to be qualified, the chain transmission assembly continues to drive the material blocking part to rotate upwards, a gap for the bar to roll down is reserved between the material blocking part and the blanking inclined plane, and the chain transmission assembly resets the material blocking part after the bar is blanked; when the straightness of the bar is judged to be unqualified, the chain transmission assembly moves the material blocking piece reversely to push the bar to return to the initial position so as to be separated from the bar with qualified straightness and perform subsequent straightening treatment.
The on-line detection method for the straightness of the bar is characterized by comprising the following steps: the on-line detection device is used for detecting the straightness of the bar; the bar material rolls on the blanking inclined plane and falls down; in the process of falling of the bar in a rolling manner, the material blocking device is arranged in front of the bar blanking direction in a blocking manner, so that the central axis of the bar is kept perpendicular to the blanking direction, the bar blanking speed is limited, and the contact track of the bar and the floating detection beam is a spiral line around the bar; under the action of the gravity of the bar, the contact tracks of the floating detection beams are respectively attached to the bar and float up and down along with the bending degree of the bar, and the elastic elements enable the floating detection beams to be attached to the bar; and the displacement sensing module acquires the up-and-down floating displacement of each floating detection beam and detects the straightness of the bar.
The method of the invention fully utilizes the space between the discharging position of the device and the blanking area; the on-line detection of the straightness of the bar is realized while blanking, so that the detection time is saved and the processing efficiency is improved; the straightness of more areas of the bar is detected, and the accuracy of judging the straightness of the bar can be improved.
Preferably, motion information of the material blocking device is obtained, and moving position data of the bar is obtained; and combining the up-and-down floating displacement data of each floating detection beam collected by the displacement sensing module with the corresponding bar moving position data, and drawing a curvature curve of the bar so as to detect the straightness of the bar. And the curvature curve of the bar is drawn, so that the straightness of the bar can be judged more intuitively and accurately. If the processing time and the data processing resources are saved, the floating numerical value between the surface of the bar and the central axis of the bar on the contact track can be obtained directly according to the up-and-down floating displacement data of each floating detection beam collected by the displacement sensing module, and the straightness of the bar is obtained.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the online detection device can be arranged between the discharging position of the equipment and the blanking area, fully utilizes the space between the discharging position of the equipment and the blanking area, and has compact structure; the on-line detection of the straightness of the bar is realized while blanking, so that the detection time is saved and the processing efficiency is improved;
2. according to the on-line detection device, the floating detection beam is obliquely arranged with the blanking direction, so that the straightness of more areas of the bar can be detected, and the accuracy of judging the straightness of the bar is improved;
3. the on-line detection device can effectively detect all positions in the full-length range of the bar, and realize the straightness detection in the full-length range of the bar.
Drawings
FIG. 1 is a schematic structural diagram of a top view angle of a bar straightness online detection device according to the present invention;
FIG. 2 is a schematic structural diagram of a side view angle of the online bar straightness detection device of the present invention;
FIG. 3 is a schematic structural diagram of the bar straightness online detection device of the present invention;
FIG. 4 is a schematic view of the installation of the floating detection beam and the fixed support beam in the online detection device for the straightness of the bar material of the present invention;
FIG. 5 is a schematic diagram showing the detecting relationship between the floating detecting beam and the bar of the on-line detecting device for the straightness of the bar of the present invention;
FIG. 6 is a schematic diagram of the principle of bar straightness detection of the bar straightness on-line detection device of the present invention;
wherein, 1 is a base, 2 is a fixed supporting beam, 21 is a fixed beam body, 22 is a fixed supporting frame, 23 is a linear guide rail, 24 is an elastic element, 25 is a positioning screw rod, 3 is a floating detection beam, 31 is a floating beam body, 32 is a floating supporting frame, 33 is a connecting column, 34 is a detection plate, 35 is a sliding block, 4 is a displacement sensing module, 5 is a controller, 6 is a material blocking device, 61 is a material blocking arm, 62 is a material blocking part, 63 is a chain transmission component, 7 is a rod, 8 is a discharging roller way, 9 is a material storage frame, and 10 is a straightening machine.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 to 6, the online detecting device for the straightness of a bar in the embodiment includes a base 1, a material blocking device 6, a plurality of fixed supporting beams 2, a plurality of floating detecting beams 3, and a displacement sensing module 4; and a controller 5. The controller 5 is respectively in signal connection with the material blocking device 6 and the displacement sensing module 4.
Each fixed supporting beam 2 is respectively connected with the base 1; the fixed support beam 2 comprises a fixed support frame 22 and a fixed beam body 21 arranged on the fixed support frame 22; all the fixed beam bodies 21 form a blanking inclined plane together, for example, an included angle of 2-3 degrees exists between the blanking inclined plane and the horizontal plane. The number of the floating detection beams 3 is the same as that of the fixed support beams 2; the number of floating detection beams and fixed support beams is generally multiple, such as two, three, four, five, six, seven, eight, nine, ten; can be set according to the length of the bar and the detection precision.
The material blocking device 6 is positioned above the blanking inclined plane. The material blocking device 6 comprises more than two material blocking arms 61 arranged side by side and a material blocking piece 62. In this embodiment, the number of the material blocking arms is four; in practical application, the number of the material blocking arms can be two, three, five or even more. Each material blocking part 62 is arranged below the material blocking arm 61 through a material blocking driving mechanism; the material blocking driving mechanism comprises a motor, a connecting rod and a plurality of chain transmission assemblies 63; each material blocking part 62 is connected below each chain transmission assembly 63, each chain transmission assembly 63 is connected with a motor through a connecting rod, and the material blocking parts 62 can reciprocate along the blanking direction, which is shown as the arrow direction in fig. 1. The material blocking part 62 is arranged in front of the bar material blanking direction in the bar material blanking process so as to keep the central axis of the bar material vertical to the blanking direction and control the bar material blanking speed.
The floating detection beams 3 are arranged side by side, and a space exists between the adjacent floating detection beams 3. An included angle alpha exists between the floating detection beam 3 and the blanking direction. The floating detection beam 3 comprises a floating support frame 32 and a floating beam body 31 arranged on the floating support frame 32; the fixed support frame 22 and the floating support frame 32 are connected in a vertically sliding manner through a linear guide rail 23 and a sliding block 35.
The fixed support frame 22 is connected with a plurality of connecting pieces; each connecting piece is provided with a through hole; the floating detection beam 3 also comprises a plurality of connecting columns 33 and a detection plate 34; the number of the connecting columns 33 is matched with that of the connecting pieces; one end of each connecting column 33 is respectively connected with the floating support frame 32, and the other end of each connecting column passes through a through hole of the connecting piece and is connected with the detection plate 34; an elastic element 24 is sleeved outside the connecting column 33, and two ends of the elastic element 24 are respectively abutted against the connecting piece and the floating support frame 32; so as to realize the elastic reset of the floating detection beam 3. The detection plate 34 corresponds in position to the displacement sensing module 4.
The upper end face of the floating detection beam 3 is higher than the upper end face of the fixed support beam 2, for example, the upper end face of the floating detection beam is 2mm to 3mm higher than the upper end face of the fixed support beam 2. A positioning screw rod 25 is further arranged between the fixed support frame 22 and the floating support frame 32, and the position between the fixed support frame 22 and the floating support frame 32 is adjusted by adjusting the extension length of the positioning screw rod 25. The positioning screw rod 25 is arranged between the fixed support frame 22 and the floating support frame 32 in a propping manner, and the extending length of the positioning screw rod 25 can be adjusted to adjust the position between the fixed support frame 22 and the floating support frame 32, so that the height difference adjustment of the upper end surface of the floating detection beam 3 and the upper end surface of the fixed support beam 2 is realized.
The working principle of the on-line detection device is as follows: the bar material rolls on the blanking inclined plane and falls down; in the process of falling of the bar materials in a rolling manner, the material blocking device 6 is arranged in front of the blanking direction of the bar materials, the chain transmission assembly 63 drives the material blocking part 62 to move to the tail end of the chain transmission assembly 63, so that the central axis of the bar materials is kept perpendicular to the blanking direction, and the blanking speed of the bar materials is limited; because an included angle alpha exists between the floating detection beam 3 and the blanking direction, the contact track of the bar and the floating detection beam 3 is a spiral line around the bar; under the action of the pressure of the bar, the contact tracks of the floating detection beams 3 float up and down along with the bending degree of the bar, the elastic elements 24 can ensure that the floating detection beams 3 are attached to the bar, and the displacement sensing module 4 acquires the up-and-down floating displacement of the floating detection beams 3, so that the straightness of the bar is detected. When the straightness of the bar is judged to be qualified, the chain transmission assembly 63 continues to drive the material blocking part 62 to rotate upwards, a gap for the bar to roll is reserved between the material blocking part 62 and the blanking inclined plane, and after the bar is blanked, the chain transmission assembly 63 resets the material blocking part 62; when the straightness of the bar is judged to be unqualified, the chain transmission assembly 63 reversely moves the material blocking piece 62 to push the bar to return to the initial position, for example, the bar can return to the discharging roller way 8 and can be subsequently transmitted to the straightening machine 10 for secondary straightening treatment.
The online detection device can be arranged between a discharging position (a discharging roller way 8) of the equipment and a blanking area (a material storage frame 9), fully utilizes the space between the discharging position of the equipment and the blanking area, and has a compact structure; the on-line detection of the straightness of the bar is realized while blanking, the detection time is saved, and the processing efficiency is improved. The floating detection beams 3 are obliquely arranged along the blanking direction, so that the floating detection beams 3 can be in contact with the bars at different positions in the length direction in the bar blanking process, the contact tracks are spiral lines around the bars, the straightness of more areas of the bars is detected, and the accuracy of the straightness judgment of the bars is improved.
The preferred scheme is as follows: the value range of the length L of the floating detection beam 3 is as follows: l is more than or equal to S/sin alpha; where S represents the spacing between adjacent floating detection beams 3. The value range of the length L of the floating detection beam 3 enables the tail of the previous floating detection beam 3 to be connected with the projection head and tail of the head of the next floating detection beam 3 on the plane perpendicular to the blanking direction, so that all positions in the full-length range of the bar can be effectively detected, and the straightness detection in the full-length range of the bar is realized.
The contact track of the bar and the floating detection beam is a spiral line around the bar, and the pitch P =3.14 × D × tan α of the spiral line; generally speaking, the smaller the included angle α between the floating detection beam 3 and the blanking direction is, the smaller the pitch of the spiral line is, and the more accurate the detection result is. However, under the condition that the distance S between adjacent floating detection beams is not changed, the smaller the included angle α is, the shorter the length L of the floating detection beam 3 is, so that the whole device is larger. Therefore, the selection of the included angle alpha between the floating detection beam 3 and the blanking direction needs to take into account the factors of the whole size and the detection precision of the device.
The detection method of the online detection device of the embodiment is as follows: the bar material rolls on the blanking inclined plane and falls down; in the process of falling of the bar in a rolling manner, the material blocking device 6 is arranged in front of the bar blanking direction in a blocking manner, so that the central axis of the bar is kept perpendicular to the blanking direction, the bar blanking speed is limited, and the contact track of the bar and the floating detection beam 3 is a spiral line around the bar; under the action of the gravity of the bar, the contact tracks of the floating detection beams 3 float up and down along with the bending degree of the bar, and the elastic elements 24 ensure that the floating detection beams 3 are kept attached to the bar; and the displacement sensing module 4 acquires the up-and-down floating displacement of each floating detection beam 3 to detect the straightness of the bar.
The method for detecting the straightness of the bar comprises the following steps: and directly obtaining the floating numerical value between the surface of the bar and the central axis of the bar on the contact track according to the up-and-down floating displacement data of each floating detection beam 3 acquired by the displacement sensing module 4, and obtaining the straightness of the bar.
More preferred embodiments are: acquiring motion information of the material blocking device 6 to obtain bar moving position data; the up-and-down floating displacement data of each floating detection beam 3 collected by the displacement sensing module 4 are combined with the corresponding bar moving position data, and a curvature curve of the bar is drawn, so that the straightness of the bar is detected. The scheme can judge the straightness of the bar more intuitively and accurately.
The following is further described with specific examples:
the diameter of the bar to be measured is 100mm, and the length is 13 meters. The distance S between the floating detection beams 3 is 600mm, the number of the floating detection beams is 24, the included angle alpha between the floating detection beams and the blanking direction is 30 degrees, and the length L of the floating detection beams 3 is 1100 mm.
After the straightened bar is conveyed to a designated position through the discharging roller way 8, the bar is poked to the fixed supporting beam 2 from the discharging roller way 8 by the poking mechanism, and the material blocking rod of the material blocking device 6 is at an initial position at the moment. The rod rolls on the inclined floating support beam 3 to the storage frame 9 under the action of self weight until the rod touches the material blocking piece 62 and stops. Then the material blocking device 6 is started, the material blocking part 62 moves at a constant speed towards the blanking direction, and the bar moves synchronously along with the material blocking part 62.
After the bar rolls on the floating support beam 3, different rolling reductions are generated for each floating detection beam 3 due to different residual bending degrees of the bar. The pitch of the contact helix on the rod is 181mm and it can be approximated that the straightness of the rod is uniform over a length of 181 mm. During the rolling process of the bar, the floating support beam 3 is always in contact with the bar, and the bending degree of the bar is reflected in the change of the up-and-down displacement of the floating support beam 3. The controller 5 collects data of the displacement sensing module 4 for analysis processing, as shown in fig. 6, assuming that the displacement of the material stopping device 6 is h =600mm at this time, it is found that the distance m =600 × tan30 ° =346mm which has been detected in the axial direction of the bar. When the bar runs out of the floating detection beam, the detected length of the bar is 952.6 × tan30 ° =550 mm. Therefore, the corresponding relation between the motion information of the material blocking device 6 and the moving position of the bar can be obtained, the bending curve of the bar can be drawn by combining the up-and-down floating displacement data of each floating detection beam 3 collected by the displacement sensing module 4, and the straightness of the bar can be detected. The scheme can judge the straightness of the bar more intuitively and accurately.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a bar straightness accuracy on-line measuring device which characterized in that: the method comprises the following steps:
a base;
the material blocking device is used for blocking the front part of the bar material blanking direction in the bar material blanking process so as to limit the bar material blanking speed;
a plurality of fixed supporting beams for supporting the bar material to roll and blanking;
the floating detection beams are used for floating up and down under the action of the gravity of the bar material, and the number of the floating detection beams is the same as that of the fixed support beams;
the displacement sensing module is used for respectively detecting the up-and-down floating displacement of each floating detection beam;
and a controller;
each fixed supporting beam is respectively connected with the base, and all the fixed supporting beams form a blanking inclined plane together; the material blocking device is positioned above the blanking inclined plane; all the floating detection beams are arranged side by side, and a space exists between every two adjacent floating detection beams; each floating detection beam is respectively connected with the fixed support beam in a vertical sliding manner, and an elastic element is arranged between each floating detection beam and the fixed support beam to realize elastic reset of each floating detection beam; the upper end surface of the floating detection beam is higher than the upper end surface of the fixed support beam; an included angle alpha exists between the floating detection beam and the blanking direction; the controller is respectively in signal connection with the material blocking device and the displacement sensing module.
2. The on-line bar straightness detection device according to claim 1, wherein: the value range of the length L of the floating detection beam is as follows: l is more than or equal to S/sin alpha; wherein S represents the spacing between adjacent floating detection beams.
3. The on-line bar straightness detection device according to claim 1, wherein: the fixed support beam comprises a fixed support frame and a fixed beam body arranged on the fixed support frame; the floating detection beam comprises a floating support frame and a floating beam body arranged on the floating support frame; the fixed support frame and the floating support frame can be connected in a vertical sliding manner; the elastic elements are a plurality of elastic elements arranged between the fixed support frame and the floating support frame.
4. The on-line bar straightness detection device according to claim 3, wherein: the fixed support frame is connected with a plurality of connecting pieces; each connecting piece is provided with a through hole; the floating detection beam also comprises a plurality of connecting columns and a detection plate; the number of the connecting columns is matched with that of the connecting pieces; one end of each connecting column is connected with the floating support frame, and the other end of each connecting column penetrates through the through hole of the connecting piece to be connected with the detection plate; each elastic element is sleeved outside the connecting column, and two ends of each elastic element are respectively abutted against the connecting piece and the floating support frame; the detection plate corresponds to the displacement sensing module in position.
5. The on-line bar straightness detection device according to claim 3, wherein: and a positioning screw rod is further arranged between the fixed support frame and the floating support frame, and the position between the fixed support frame and the floating support frame is adjusted by adjusting the extension length of the positioning screw rod.
6. The on-line bar straightness detection device according to claim 3, wherein: the fixed support frame and the floating support frame are connected in a vertically sliding mode through the linear guide rail and the sliding block.
7. The on-line bar straightness detection device according to claim 1, wherein: the material blocking device comprises more than two material blocking arms which are arranged side by side and a material blocking piece; each material blocking part is arranged below the material blocking arm through a material blocking driving mechanism respectively so as to realize the reciprocating movement of the material blocking parts along the blanking direction.
8. The on-line bar straightness detection device according to claim 7, wherein: the material blocking driving mechanism comprises a motor, a connecting rod and a plurality of chain transmission assemblies; each material blocking piece is connected below each chain transmission assembly respectively, and each chain transmission assembly is connected with the motor through a connecting rod.
9. The on-line detection method for the straightness of the bar is characterized by comprising the following steps: on-line detection device for the straightness of the bar according to any one of claims 1 to 8; the bar material rolls on the blanking inclined plane and falls down; in the process of falling of the bar in a rolling manner, the material blocking device is arranged in front of the bar blanking direction in a blocking manner, so that the central axis of the bar is kept perpendicular to the blanking direction, the bar blanking speed is limited, and the contact track of the bar and the floating detection beam is a spiral line around the bar; under the action of the gravity of the bar, the contact tracks of the floating detection beams are respectively attached to the bar and float up and down along with the bending degree of the bar, and the elastic elements enable the floating detection beams to be attached to the bar; and the displacement sensing module acquires the up-and-down floating displacement of each floating detection beam and detects the straightness of the bar.
10. The on-line bar straightness detection method according to claim 9, wherein: acquiring motion information of the material blocking device to obtain moving position data of the bar; and combining the up-and-down floating displacement data of each floating detection beam collected by the displacement sensing module with the corresponding bar moving position data, and drawing a curvature curve of the bar so as to detect the straightness of the bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110951943.2A CN113546987B (en) | 2021-08-19 | 2021-08-19 | Online detection device and online detection method for straightness of bar |
Applications Claiming Priority (1)
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Cited By (1)
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|---|---|---|---|---|
| CN115156081A (en) * | 2022-07-28 | 2022-10-11 | 中国科学院空天信息创新研究院 | Bar sorting device |
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| CN113546987B (en) | 2023-03-21 |
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