CN111054753B - Strip steel head threading control method and system - Google Patents
Strip steel head threading control method and system Download PDFInfo
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- CN111054753B CN111054753B CN201911178692.8A CN201911178692A CN111054753B CN 111054753 B CN111054753 B CN 111054753B CN 201911178692 A CN201911178692 A CN 201911178692A CN 111054753 B CN111054753 B CN 111054753B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0085—Joining ends of material to continuous strip, bar or sheet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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Abstract
本发明公开了一种带钢头穿带控制方法及系统，用于利用缝合机对带钢进行缝合时，控制带头到达缝合位置，所述方法包括：当所述缝合控制器接收到所述第二检测器检测到所述带头的第二定位信号时，控制所述带头在所述第二预设距离内降速至0.1‑0.3m/s；当所述缝合控制器接收到所述第一检测器检测到所述带头的第一定位信号时，根据所述带头降速后的速度和第一预设距离，控制所述带头达到缝合位置；解决现有的带头定位控制方法对厚度较薄的带钢的定位控制精度低的技术问题。
The invention discloses a method and a system for controlling the threading of a strip steel head, which are used to control the strip head to reach a sewing position when a sewing machine is used to sew strip steel. The method includes: when the sewing controller receives the first When the two detectors detect the second positioning signal of the lead head, control the lead head to decelerate to 0.1-0.3m/s within the second preset distance; when the suture controller receives the first When the detector detects the first positioning signal of the leader, it controls the leader to reach the stitching position according to the speed of the leader after deceleration and the first preset distance; it solves the problem that the existing leader positioning control method has a relatively thin thickness. The technical problem of the low positioning control accuracy of the strip.
Description
Technical Field
The invention relates to the technical field of band steel sewing control, in particular to a band steel head threading control method and system.
Background
The head and the tail of the strip steel in the processing line are connected by a sewing machine in a mode of sewing, the sewing machine body does not have the high-precision positioning function of the head and the tail of the strip steel, and the head and the tail of the strip steel need to be positioned to the sewing machine by the aid of production line equipment, so that sewing is completed. The positioning precision of the belt head and the belt tail directly influences the sewing quality.
The existing tape head positioning control method has low positioning control precision on the thin strip steel (for example, about 0.2 mm), and causes poor sewing quality.
Disclosure of Invention
The embodiment of the application provides a strip head threading control method and a strip head threading control system, and solves the technical problem that the positioning control precision of the existing strip head positioning control method for the strip steel with the thin thickness is low.
On one hand, the present application provides the following technical solutions through an embodiment of the present application:
a strip steel head threading control method is used for controlling a strip head to reach a sewing position when a sewing machine is used for sewing strip steel, and a threading control system is installed on the sewing machine and comprises the following steps:
the first detector is arranged on a strip steel running path which is a first preset distance away from the inlet of the sewing machine and used for positioning the strip head before the strip head reaches the inlet of the sewing machine; wherein the first preset distance is 0.5-1.0 m;
the second detector is arranged on a strip steel running path which is a second preset distance away from the first detector and used for positioning the strip head before the strip head reaches the first detector;
a stitching controller connected to the first detector and the second detector, respectively;
the method comprises the following steps:
when the sewing controller receives a second positioning signal of the tape head detected by the second detector, the tape head is controlled to be decelerated to 0.1-0.3m/s within the second preset distance;
and when the sewing controller receives a first positioning signal that the first detector detects the belt head, controlling the belt head to reach a sewing position according to the speed of the belt head after the speed reduction and a first preset distance.
Optionally, the first preset distance is 0.5 m.
Optionally, the method includes:
and when the sewing controller receives a second positioning signal of the tape head detected by the second detector, controlling the tape head to decelerate to 0.1m/s within the second preset distance.
Optionally, the second preset distance is 0.5 m.
Optionally, the first detector is a grating.
Optionally, the second detector is a grating.
Optionally, the detection direction of the grating is perpendicular to the tape head running direction.
Optionally, the stitching controller is a PLC.
In another aspect, the present application provides a threading control system for a strip head, for controlling the strip head to reach a sewing position when sewing the strip steel by using a sewing machine, the system including:
the first detector is arranged on a strip steel running path which is a first preset distance away from the inlet of the sewing machine and used for positioning the strip head before the strip head reaches the inlet of the sewing machine; wherein the first preset distance is 0.5-1.0 m;
the second detector is arranged on a strip steel running path which is a second preset distance away from the first detector and used for positioning the strip head before the strip head reaches the first detector;
a stitching controller connected to the first detector and the second detector, respectively;
the sewing controller comprises:
the first control module is used for controlling the tape head to decelerate to 0.1-0.3m/s within the second preset distance when the sewing controller receives a second positioning signal of the tape head detected by the second detector;
and the second control module is used for controlling the tape head to reach a sewing position according to the speed of the tape head after the tape head is decelerated and a first preset distance when the sewing controller receives a first positioning signal that the first detector detects the tape head.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the method and the system are used for controlling the head of the band to reach the sewing position when the band steel is sewn by using a sewing machine, and the sewing machine is provided with a band threading control system, and the system comprises: the first detector is arranged on a strip steel running path which is a first preset distance away from the inlet of the sewing machine and used for positioning the strip head before the strip head reaches the inlet of the sewing machine; wherein the first preset distance is 0.5-1.0 m; the second detector is arranged on a strip steel running path which is a second preset distance away from the first detector and used for positioning the strip head before the strip head reaches the first detector; a stitching controller connected to the first detector and the second detector, respectively; the method comprises the following steps: when the sewing controller receives a second positioning signal of the tape head detected by the second detector, the tape head is controlled to be decelerated to 0.1-0.3m/s within the second preset distance; when the sewing controller receives a first positioning signal of the tape head detected by the first detector, controlling the tape head to reach a sewing position according to the speed of the tape head after the speed reduction and a first preset distance; the scanning execution period of the controller is a fixed value, a single scanning period is generally 0.1 second, a stop command is issued when the strip steel is positioned at the speed of 0.5m/s, and the strip steel runs for 0.05m in the scanning period; when the speed is reduced to 0.1-0.3m/s, the operation is carried out for 0.01-0.03 m in the scanning period, and the strip steel positioning precision is improved by 2-4 times only after the positioning is completed in the previous scanning period; in addition, the thin strip steel has soft characteristics, so that the strip steel is easy to droop at a lower horizontal position of a strip steel walking channel during strip threading, and the controller calculates the moving distance of the strip steel under the condition of normal unbending and droop according to the positioning distance and the strip head speed; therefore, the positioning distance of the tape head is controlled to be 0.5-1.0m, compared with the existing 8m or so, the tape head control inaccuracy caused by the sagging of the thin strip steel can be avoided, the tape head control precision is obviously improved, and the tape head can accurately reach the sewing position.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flowchart of a strip threading control method according to an embodiment of the present invention;
fig. 2 is a block diagram of a strip head threading control system in an embodiment of the present invention.
Detailed Description
The embodiment of the application provides a strip steel head threading control method and system, and solves the technical problem that oil leakage of a hydraulic cylinder of a rack frequently occurs due to overlarge roll bending force in a roll changing method in the prior art.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a strip steel head threading control method is used for controlling a strip head to reach a sewing position when a sewing machine is used for sewing strip steel, and a threading control system is installed on the sewing machine and comprises the following steps: the first detector is arranged on a strip steel running path which is a first preset distance away from the inlet of the sewing machine and used for positioning the strip head before the strip head reaches the inlet of the sewing machine; wherein the first preset distance is 0.5-1.0 m; the second detector is arranged on a strip steel running path which is a second preset distance away from the first detector and used for positioning the strip head before the strip head reaches the first detector; a stitching controller connected to the first detector and the second detector, respectively; the method comprises the following steps: when the sewing controller receives a second positioning signal of the tape head detected by the second detector, the tape head is controlled to be decelerated to 0.1-0.3m/s within the second preset distance; and when the sewing controller receives a first positioning signal that the first detector detects the belt head, controlling the belt head to reach a sewing position according to the speed of the belt head after the speed reduction and a first preset distance.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Example one
In this embodiment, a band steel head threading control method is used to control a band head to reach a stitching position when a stitching machine is used to stitch a band steel, and the stitching machine is provided with a threading control system, and the system includes:
the first detector is arranged on a strip steel running path which is a first preset distance away from the inlet of the sewing machine and used for positioning the strip head before the strip head reaches the inlet of the sewing machine; wherein the first preset distance is 0.5-1.0 m;
the second detector is arranged on a strip steel running path which is a second preset distance away from the first detector and used for positioning the strip head before the strip head reaches the first detector;
a stitching controller connected to the first detector and the second detector, respectively;
referring to fig. 1, the method includes:
s101, when the sewing controller receives a second positioning signal of the tape head detected by the second detector, controlling the tape head to decelerate to 0.1-0.3m/S within the second preset distance;
s102, when the sewing controller receives a first positioning signal that the first detector detects the tape head, controlling the tape head to reach a sewing position according to the speed of the tape head after the speed reduction and a first preset distance.
When a sewing machine is used for sewing strip steel, the positioning accuracy of a head and a tail of the strip steel directly affects the sewing quality, and when the strip steel with the thickness of about 0.2mm is processed, the strip steel is extremely thin and soft in characteristics, and easily sags at a lower level of a strip steel walking channel during threading, so that the positioning accuracy is affected. Meanwhile, the existing threading speed is 0.5m/s, the PLC scanning period is 100ms, and the strip steel advances by 0.05m in a single scanning period, which means that the minimum error of a control system is 0.05m, and the positioning precision of the head and the tail of the strip steel is required to be within 0.03m during sewing, otherwise, the sewing quality is poor, and the machine set is stopped due to failure.
The method is used for controlling the band head to reach the sewing position when the sewing machine is used for sewing the band steel.
To implement the method, first of all, a threading control system is installed on the sewing machine, said system comprising, with reference to fig. 2:
the first detector is arranged on a strip steel running path which is a first preset distance away from the inlet of the sewing machine and used for positioning the strip head before the strip head reaches the inlet of the sewing machine; wherein the first preset distance is 0.5-1.0 m;
the second detector is arranged on a strip steel running path which is a second preset distance away from the first detector and used for positioning the strip head before the strip head reaches the first detector;
and the stitching controller is respectively connected with the first detector and the second detector.
As an alternative embodiment, the first detector is a grating.
In an alternative embodiment, the second detector is a grating.
Specifically, the signal identifier of the grating includes 0 and 1, which may represent a signal and no signal, respectively.
In an alternative embodiment, the detection direction of the grating is perpendicular to the tape head running direction.
As an alternative embodiment, the stitching controller is a Siemens S7-400 large PLC.
How each step realizes the tape head control based on the system is explained in detail below with reference to the attached drawings.
Referring to fig. 1, S101 is first executed, and when the stitching controller receives a second positioning signal that the second detector detects the tape head, the stitching controller controls the tape head to decelerate to 0.1-0.3m/S within the second preset distance.
Specifically, in order to improve the positioning accuracy, the running speed of the strip steel during positioning needs to be reduced, and the positioning length needs to be shortened. The lower the speed of the strip steel is, the smaller the positioning error generated by the control system is; thus, at a second predetermined distance from the first detector, the deceleration is started and the speed is reduced to 0.1-0.3m/s within the second predetermined distance, which is further reduced compared to the existing 0.5 m/s.
As an alternative embodiment, the method comprises:
and when the sewing controller receives a second positioning signal of the tape head detected by the second detector, controlling the tape head to decelerate to 0.1m/s within the second preset distance. The positioning precision is improved by 4 times.
As an alternative embodiment, the second preset distance is 0.5 m.
Next, S102 is executed, and when the stitching controller receives the first positioning signal that the first detector detects the tape head, the stitching controller controls the tape head to reach the stitching position according to the speed of the tape head after the speed reduction and the first preset distance.
After the tape head speed is reduced, because continuous operation, the sewing department is many, must influence whole operating efficiency, for this reason, increase a grating at the sewing machine entry apart from 0.5 meters, start the accurate location of tape head when detecting the tape head and passing through, location length shortens to 0.5 meters by current 8 meters, because the speed of operation reduces to 0.1m/s by 0.5m/s during the location, the location precision shortens to 0.01 meters by original minimum 0.05 meters, satisfied the requirement of sewing up, the quality of sewing up has been improved, and reduce low-speed consuming time to the minimum, guaranteed that operating efficiency is not influenced.
The grating is used as a positioning activation condition, and the positioning distance is shortened to the maximum extent, so that the positioning precision can be improved. The reason is that the grating position is fixed, the length of the belt head from a target set value is guaranteed to be a fixed value when the positioning is activated each time, the triggering positioning under the same condition is guaranteed each time, the positioning set length is short, the deviation generated in the positioning execution process is small, and the positioning precision is improved.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the method is used for controlling the band head to reach the sewing position when the sewing machine is used for sewing the band steel, and the sewing machine is provided with a band threading control system, and the system comprises: the first detector is arranged on a strip steel running path which is a first preset distance away from the inlet of the sewing machine and used for positioning the strip head before the strip head reaches the inlet of the sewing machine; wherein the first preset distance is 0.5-1.0 m; the second detector is arranged on a strip steel running path which is a second preset distance away from the first detector and used for positioning the strip head before the strip head reaches the first detector; a stitching controller connected to the first detector and the second detector, respectively; the method comprises the following steps: when the sewing controller receives a second positioning signal of the tape head detected by the second detector, the tape head is controlled to be decelerated to 0.1-0.3m/s within the second preset distance; when the sewing controller receives a first positioning signal of the tape head detected by the first detector, controlling the tape head to reach a sewing position according to the speed of the tape head after the speed reduction and a first preset distance; the scanning execution period of the controller is a fixed value, a single scanning period is generally 0.1 second, a stop command is issued when the strip steel is positioned at the speed of 0.5m/s, and the strip steel runs for 0.05m in the scanning period; when the speed is reduced to 0.1-0.3m/s, the operation is carried out for 0.01-0.03 m in the scanning period, and the strip steel positioning precision is improved by 2-4 times only after the positioning is completed in the previous scanning period; in addition, the thin strip steel has soft characteristics, so that the strip steel is easy to droop at a lower horizontal position of a strip steel walking channel during strip threading, and the controller calculates the moving distance of the strip steel under the condition of normal unbending and droop according to the positioning distance and the strip head speed; therefore, the positioning distance of the tape head is controlled to be 0.5-1.0m, compared with the existing 8m or so, the tape head control inaccuracy caused by the sagging of the thin strip steel can be avoided, the tape head control precision is obviously improved, and the tape head can accurately reach the sewing position.
Example two
In this embodiment, a threading control system for a strip end is used for controlling the strip end to reach a sewing position when a sewing machine is used to sew a strip, and the system includes:
the first detector is arranged on a strip steel running path which is a first preset distance away from the inlet of the sewing machine and used for positioning the strip head before the strip head reaches the inlet of the sewing machine; wherein the first preset distance is 0.5-1.0 m;
the second detector is arranged on a strip steel running path which is a second preset distance away from the first detector and used for positioning the strip head before the strip head reaches the first detector;
a stitching controller connected to the first detector and the second detector, respectively;
the sewing controller comprises:
the first control module is used for controlling the tape head to decelerate to 0.1-0.3m/s within the second preset distance when the sewing controller receives a second positioning signal of the tape head detected by the second detector;
and the second control module is used for controlling the tape head to reach a sewing position according to the speed of the tape head after the tape head is decelerated and a first preset distance when the sewing controller receives a first positioning signal that the first detector detects the tape head.
Since the strip head threading control system described in this embodiment is a system used for implementing the strip head threading control method according to the embodiment of the present application, a person skilled in the art can understand the specific implementation manner of the system according to the embodiment and various variations thereof based on the strip head threading control method described in the first embodiment of the present application, and therefore, how to implement the method according to the embodiment of the present application by the system is not described in detail herein. The system adopted by the person skilled in the art to implement the method for controlling threading of the strip head in the embodiment of the present application is within the scope of the protection of the present application.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
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| CN114669607A (en) * | 2022-03-09 | 2022-06-28 | 陕钢集团汉中钢铁有限责任公司 | Loop ensemble control method |
| CN115608781A (en) * | 2022-10-25 | 2023-01-17 | 中铝瑞闽股份有限公司 | An automatic sewing device and control method for strip continuous production line |
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Address after: 064400 No. 025 Zhao'an Street, Qian'an Economic Development Zone, Tangshan City, Hebei Province Patentee after: Shougang Zhixin Electromagnetic Materials (Qian'an) Co.,Ltd. Country or region after: China Address before: 064400 No. 025, Zhao an street, western industrial area, Qian'an, Tangshan City, Hebei Patentee before: SHOUGANG ZHIXIN QIAN'AN ELECTROMAGNETIC MATERIALS Co.,Ltd. Country or region before: China |