CN109178417B - Method for realizing full-automatic packing of cold-rolled deformed steel bar production line - Google Patents
Method for realizing full-automatic packing of cold-rolled deformed steel bar production line Download PDFInfo
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- CN109178417B CN109178417B CN201811147599.6A CN201811147599A CN109178417B CN 109178417 B CN109178417 B CN 109178417B CN 201811147599 A CN201811147599 A CN 201811147599A CN 109178417 B CN109178417 B CN 109178417B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B27/00—Bundling particular articles presenting special problems using string, wire, or narrow tape or band; Baling fibrous material, e.g. peat, not otherwise provided for
- B65B27/10—Bundling rods, sticks, or like elongated objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B13/00—Bundling articles
- B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
- B65B13/185—Details of tools
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Abstract
The method for realizing full-automatic packing of the cold-rolled deformed steel bar production line is realized on the existing semi-automatic packing machine and the manual conveying system of the cold-rolled deformed steel bar, and A: setting a length measuring roller B: a waiting position approach switch and a hoisting position approach switch are arranged on the manual conveying system; c: information exchange communication between the conveying system and the semi-automatic packing machine is realized; d: calculating the distance from the position of each binding wire to the head of the bale during packing, wherein Ln = (Lc-Lh-Lt)/(n-1) + Lh, and Lc: the total length of the bar product to be packaged; lh: a head turn distance; and Lt: tail turn distance; n: total number of turns; e: and measuring the length of the material bundle passing through the central line of the semi-automatic packing machine in real time, and when the length is equal to the length of one turn in the front n-1 turns, operating the wire binding of the semi-automatic packing machine. The method can realize automatic packaging.
Description
Technical Field
The invention relates to cold-rolled wire rod packing, in particular to a method for realizing full-automatic packing of a cold-rolled deformed steel bar production line, belonging to the technical field of wire rod cold rolling.
Background
On hot rolling wire rod and bar production line, the wire rod packer and the bar packer developed on the basis of the wire rod packer have basically realized the localization, the automation degree is not lower than the similar products abroad, and the difference between the durability and the stability is smaller and smaller. However, the packaging process on the domestic cold-rolled deformed steel bar production line does not completely realize automation, and the reasons are as follows:
1) cold-rolled deformed steel bar production enterprises are mostly medium-sized and small enterprises, and operators are reluctant to invest excessive funds to purchase expensive packaging machines and matched automatic equipment thereof, so that investment and income ratio are not cost-effective in view of the enterprises.
2) The existing cold-rolled deformed steel bar has low production line speed and does not have strong requirements on full automation of a packaging process.
3) Packer suppliers often can only provide packer hosts, supporting feeding and conveying systems often require enterprises to solve the problem, and the small and medium-sized enterprises have no technical capability to design automatic conveying and feeding systems matched with the packers, so that full automation of packing cannot be realized.
Based on the above points, the control of the packing procedure of the cold-rolled deformed steel bar production coil rod at present adopts either a full-manual mode or a semi-automatic mode, and the realization methods and the advantages and the disadvantages of the two modes are as follows:
1. all-hand operation
The most common manual bar packer is a pneumatic packer, the power source of which is compressed air, and the packing material is a packing belt; when the user uses the machine, the user generally installs the packer on a movable packer car, when the rod material bundle to be packed is packed, the rod material bundle is still, the operator firstly manually moves the packer car to a packing position, then operates the packer to start packing, packs for 1 turn each time, and then moves the packer car to the next packing position to pack for the next 1 turn after packing, until the whole bundle is packed, generally 9 turns of the rod material with the length of 9 meters need to be packed, the user needs to manually move the packing trolley for 9 times, and manually operates the packer to pack for 9 times; the method has the advantages of small investment, simple equipment and control mode and easy realization; the defects are that the labor intensity of workers is high, the efficiency is low, and even a skilled worker is difficult to keep up with the production beat when the speed of a production line is higher than 200 m/min;
2. semi-automatic
Semi-automatic means that the process of packing of the bar packing machine is automatically completed, but the actions of the auxiliary packing equipment, the starting and stopping of the packing feeding conveying system, the exchange of signals and the like need to be completed through manual operation. The semi-automatic bar packer is generally a full hydraulic system, one packing period comprises the working procedures of wire threading, tightening, twisting, shearing, resetting, flattening and the like, and the actions can be automatically completed by the packer. The auxiliary equipment of the packer is a former, the former holds the material bundle in the whole packing process, so that the package is more uniform and tighter, the former loosens after the package is finished, and the feeding conveying system acts. The semi-automatic packing mode has the advantages that the equipment investment is small, the electric control system is simple, the packing operation can be completed on one operation box, the labor intensity is low, and the semi-automatic packing mode can adapt to higher production speed; the defects that operators still can not be left, the packing speed is relatively limited, and the method is not suitable for the development trend of continuous speed increase of a thread steel bar production line. Although the semi-automatic packing mode is obviously improved compared with the manual packing mode, the semi-automatic packing mode is still compatible under the development trend of intellectualization, high speed and scale, and a low-cost and full-automatic solution is urgently needed in the packing link of the cold-rolled deformed steel bar production line.
Disclosure of Invention
The invention aims to overcome the problems of packaging in the production of the conventional cold-rolled thread bar and provides a method for realizing full-automatic packaging in a production line of the cold-rolled thread steel bar.
In order to realize the purpose of the invention, the following technical scheme is adopted: the full-automatic packing method of the cold-rolled deformed steel bar production line is realized on the prior semi-automatic packing machine and the manual conveying system of the cold-rolled deformed steel bar, and adopts the following method:
a: a length measuring roller is arranged between the manual conveying system and the semi-automatic packing machine, the length measuring roller is driven to rotate when the cold-rolled deformed steel bar is conveyed to the semi-automatic packing machine, a rotary encoder is arranged on the length measuring roller, and the rotary encoder is connected to the PLC control system;
b: a waiting position approach switch for detecting the cold-rolled deformed steel bar is arranged on a manual conveying system in front of a semi-automatic packing machine, the manual conveying system stops after the cold-rolled deformed steel bar triggers the waiting position approach switch, the cold-rolled deformed steel bar is positioned at a packing waiting position, a hoisting position approach switch for detecting the packed cold-rolled deformed steel bar is arranged on the manual conveying system behind the semi-automatic packing machine, the waiting hoisting is stopped after the packed cold-rolled deformed steel bar triggers the hoisting position approach switch, and after the hoisting is finished, a PLC control system receives a stop position approach switch signal; the manual conveying system is connected with a PLC control system to form a conveying system;
c: the method of dry contact is adopted to realize information exchange communication between the conveying system and the semi-automatic packing machine, and the information to be exchanged is as follows:
1. semi-automatic baling press is to conveying system:
1.1 preparing: the signal effectively indicates that the semi-automatic packing machine has no fault and is in a standby state at any time; if the package is invalid, the semi-automatic packaging machine is indicated to have a fault, and the conveying system is prohibited from feeding materials to the package;
1.2 in situ: the semi-automatic packer is in the original position after running in a manual or automatic mode at present, the signal is a safety interlocking signal, the conveying system is allowed to run when the signal is effective, and the material bundle can pass through the packer;
1.3, packaging is completed: when the semi-automatic packer finishes one turn, the signal is effective once, and the conveying system counts the number of turns by using the signal and takes the signal as a trigger signal for automatically controlling the next action of the flow;
1.4 response signal: in order to ensure the reliability of communication, the packaging system correspondingly sends 2 response signals to the conveying system after receiving 2 signals sent by the conveying system;
2. manual conveyer to semi-automatic baling press:
2.1 preparing: indicating that the conveying system is faultless, and allowing the packer to operate in an automatic mode;
2.2 packaging request: after the conveying system finishes packing and positioning once, the signal is effective once, and a packing request signal is sent to the semi-automatic packing machine;
2.3 response signal: after receiving the 3 signals sent by the packing system, the conveying system correspondingly sends 3 response signals to the semi-automatic packing system;
d: calculating the length of each turn according to the length of the bar, the number of packing turns, the distance between the head turn and the tail turn, wherein the distance between the head turn refers to the length between the first turn and the head of the bale; the tail turn distance refers to the length of the tail of the last turn-distance bale; obtaining the distance from each binding wire position to the head of the bale during packing, wherein the calculation formula is as follows:
ln = (Lc-Lh-Lt)/(n-1) + Lh (n is 2 or more)
In the above formula:
ln: the target position of the nth turn of the wrapping wire;
lc: the total length of the bar product to be packaged;
lh: a head turn distance;
and Lt: tail turn distance;
n: the total number of turns to be packed;
e: measuring the length of the material bundle passing through the central line of the semi-automatic packing machine in real time in the process of conveying the material bundle, stopping the conveying system when the length is equal to the length of a certain circle in the front n-1 circles, and beating the binding wires onto the material bundle by the operation of the semi-automatic packing machine;
the length of the bale passing through the centerline of the semi-automatic baler is obtained by:
Lg=Cp×(Lp/Pn)-Lb
in the above formula:
lg: the material bundle passes through the length of the central line of the semi-automatic packing machine;
cp: the PLC high-speed module receives the pulse number sent by the encoder;
lp: measuring the perimeter of the length roller;
pn: the number of lines of the encoder;
lb: measuring the distance from the length measuring roller to the central line of the semi-automatic packing machine;
f: e, after the semi-automatic packing machine operates to beat the binding wires on the material bundles, sending a signal to a conveying system, conveying the materials to the semi-automatic packing machine by the conveying system, and repeating the step E; binding wires at the (n-1) th turn position to the material bundle;
f: when the wire binding position of the nth turn is determined, the conveying system adopts time control, and the method specifically comprises the following steps: calculating the average value of the time for the conveying system to convey the length of the material bundle between the 1 st circle and the n-1 st circle between the adjacent circles in the control system, and adopting the average value of the time for the conveying system to stop feeding the semi-automatic packing machine after the n-1 circles of wire bundling is completed;
g: and after the nth turn of wire binding is finished, the conveying system conveys the material bundle to the hoisting position, after the material bundle triggers the hoisting position proximity switch, the conveying system stops, and the counting value of the length measuring counter is reset, and the counting value of the number of turns is reset.
Further, the method comprises the following steps of; d, considering the inertia distance of the conveying system when the distance between the head turn and the tail turn is set, wherein the inertia distance refers to the distance of the travelling of the material bundle conveyed by the conveying system in the time period from the time when the control system sends a stop command to the time when the conveying system completely stops; wherein: the head turn distance = the set head turn distance + the inertial distance; tail turn distance = set tail turn distance-inertial distance; and the set head turn distance and the set head turn and tail turn distance are equal to the values set on the touch screen of the control system.
The invention has the beneficial technical effects that: the equipment configuration and the semi-automatic mode are basically the same, only the speed measurement, calculation, communication with the packaging machine and a logic control part are added, the cost increase is extremely limited and can be basically ignored. The full automation is really realized in the packing link of the production of the cold-rolled threaded bar, the whole process does not need manual participation any more, and the packing efficiency is also improved by times. Because of the obvious improvement of the automatic feeding positioning precision, the number of turns of each finished product packaged is completely the same, the phenomenon of multiple turns or missing turns is basically avoided, the safety and the reliability in the transportation process are ensured, the number of turns and the positions of turns of wires can be modified and set arbitrarily according to the special requirements of the process or customers, the adaptability of the whole set of control system is improved, and almost all applications in the industry do not need to be modified and can be directly transplanted. The method is used for a plurality of projects and production lines with different specifications for a plurality of times, shows that the method completely achieves the expected effect in the design process, and is an ideal alternative scheme of a semi-automatic packing mode.
Drawings
Fig. 1 is a schematic diagram of a packaging system adopted by the method.
Detailed Description
The invention is explained in detail with reference to the drawings, in which: 1, a packaging machine; 2: a former A; 3: a former B; 4: a measuring roller; 5: a rotary encoder; 6: a conveying system A section; :7: a conveying system B section; 8: a packing wait bit; 9: and hoisting the waiting position. The automatic packing machine is characterized in that 1, 2 and 3 are provided on the existing semi-automatic packing machine, 6 and 7 are provided on a manual conveying system, 4 and 5 are provided for realizing full-automatic packing newly adding, and 8 and 9 are set in a control system through a proximity switch.
The hardware used in the method mainly comprises a PLC (programmable logic controller), an HMI (touch screen), a PLC high-speed counting module, a PLC digital quantity input and output module, a photoelectric rotary encoder, a motor controller and a proximity switch. The original bar semi-automatic packing machine is provided with a set of control system, and the control system only needs to complete necessary signal interaction with the bar semi-automatic packing machine.
The PLC host (CPU) mainly completes logic control, positioning control related calculation and the like of the positioning conveying system and the former; the HMI completes setting, displaying, monitoring and the like of various parameters; the PLC high-speed counting module counts the pulses sent by the encoder at a high speed, and the PLC calculates the actual corresponding length; the motor controller drives the positioning conveying system to complete positioning related actions such as starting and stopping; the proximity switch is used for determining positions such as a packing waiting position, a hoisting position, a former holding position and a releasing position, and the like, and finishing the acquisition of relevant equipment actions and safety signals.
3. HMI parameter setting
The PLC system is used for completing the calculation of related data of positioning and conveying, and is matched with a control system of a packing machine to realize the real full-automatic packing, and the HMI is required to preset the following parameters:
packing product length-length set value of bar product to be packed, for example: 9000 mm.
Packing turns-the number of turns a bar product needs to be packed sets, for example: 9 turns.
Head turn distance-the distance of the first turn of baling filament from the head of the bale, e.g., 350 mm.
Tail turn distance-the distance of the last turn of baling filament from the tail of the bale, for example: 350 mm.
Encoder pulse count-packing length encoder pulse line count setting, for example: the length measuring device uses a 1000-wire encoder, and the set value is 1000.
"Length roller perimeter" -the perimeter of the length roller connected to the length encoder, for example: 200 mm.
[ MEASURING LENGTH-PACKING AXIS ] is the distance between the axle center of the length-measuring roller and the packaging axle center of the packer.
The packing and positioning conveying system of the embodiment does not use a servo or variable frequency driving system, uses the most economical motor controller, is similar to a contactor, is not precise positioning control, and has larger inertia of the material bundle, so that a certain time is required from the control system sending a stop command to the complete stop of the conveying system, namely, the material bundle of the rod material has a certain overshoot distance in the conveyor. In order to ensure that the packing distance of the head and tail packing wires is uniform, the two parameters of the 'head turn distance' and the 'tail turn distance' can be modified for correction. For example, if we want the distance between the head turn and the tail turn to be 350mm, but the overshoot distance is 50mm each time the feeding of the conveyor is stopped, and the overshoot distance is basically a constant value, as verified by a plurality of engineering examples, we can set the distance between the head turn and the tail turn to be 300mm and 400mm respectively. If the control logic, the flow and the principle are not changed, and if some cost is increased, the positioning conveying system is changed into a variable frequency or servo drive, the positioning control effect is believed to be better, and the inertia momentum is reduced.
4. Conveying system positioning related calculations
The packing positioning conveying system is one of motion control, belongs to positioning control, and firstly needs to know a target position and secondly needs to know a current position to realize the positioning control.
The target position of the scheme is the distance from each packing position (namely, the wire binding position) to the head of the material bundle, and the position of each turn of wire binding can be easily calculated according to the parameters set on the HMI, and the calculation formula is as follows:
Ln=(Lc-Lh-Lt)/(n-1)+Lh （n>=2）
in the formula:
ln: the target position of the nth turn of the wrapping wire;
lc: the total length of the bar product to be packed (HMI preset parameter);
lh: one turn of head pitch, which is also the target position of the first turn of the wrapping filament (HMI preset parameter);
and Lt: tail turn pitch (HMI preset parameter);
n: the total number of turns to be packed (HMI preset parameter);
the current position in the scheme refers to the length of the bale passing through the baling center line of the baling press in the process of conveying the bale to be baled by the feeding positioning and conveying system. The calculation formula is as follows:
Lg=Cp×(Lp/Pn)-Lb
in the formula:
lg: the length of the material bundle passing through the packing center line of the packing machine;
cp: the PLC high-speed module receives the pulse number sent by the length measuring encoder;
lp: the length measuring device measures the perimeter of the length roller (HMI preset parameters);
pn: the number of lines of the length measuring encoder (HMI preset parameter);
lb: measuring the distance from the length measuring roller to the packing center line (HMI preset parameter);
the process of positioning each time of the conveying system is the process that the control system continuously compares the size of Lg and the size of Ln, when Lg = Ln, the positioning is finished, the conveying system stops, and the packing is started.
5. Communication between the conveying control system and the packer control system:
the conveying control system and the packer control system are two mutually independent systems, and in order to realize full-automatic packing, the two control systems must be capable of communicating with each other to complete the exchange of some specific information. According to the scheme, the information needing to be interacted between the two systems is limited, the communication adopts a dry contact mode, and the information needing to be exchanged is as follows.
1) Baler to conveyor
1.1 preparing: the signal effectively indicates that the packaging machine has no fault and is in a ready state at any time; if the packaging machine is invalid, the packaging machine is in failure, and the conveying system is prohibited from feeding materials to the packaging machine;
1.2 in situ: the automatic control device is characterized in that the baler is located at the original position at present after running in a manual or automatic mode, the signal is a safety interlocking signal, the conveying system is allowed to run when the signal is effective, and the bale can pass through the baler;
1.3, packaging is completed: when the packer finishes one turn, the signal is effective once, and the conveying system counts the number of turns by using the signal and takes the signal as a trigger signal for automatically controlling the next action of the flow;
1.4 response signal: in order to ensure the reliability of communication, after receiving 2 signals sent by the conveying system, the packaging system correspondingly sends 2 response signals (handshake signals) to the conveying system;
2) conveyer-packer
2.1 preparing: indicating that the conveyor system is faultless, allowing the baler to operate in an automatic mode.
B, packaging the request: after the conveying system finishes packing positioning once, the signal is effective once, and a packing request signal is sent to the packing machine.
Response signal: after receiving the 3 signals sent by the packaging system, the conveying system correspondingly sends 3 response signals to the packaging system.
6. Last turn packing process
Due to the limitation of the installation space, the distance Lb from the length measuring roll to the baling centre line may be greater than the tail turn distance, so that the entire bale has been detached from the length measuring roll during the last turn, resulting in a lack of positioning.
For this case, the data value of the encoder is no longer used for the control for the positioning of the last turn, but rather a time control is used. Besides the first circle positioning, the conveying distance of the conveying system is the same when each circle positioning is carried out, and the running speed of the conveyor is the same when each circle positioning is carried out because the conveyor is controlled by a motor controller, so the running time is the same. In order to ensure the positioning accuracy, the system measures the running time in the positioning running process of each turn (except for the positioning of the first turn), screens and averages the time data, and then uses the average value as the running time of the conveying system in the positioning of the last turn. The method is only applied in the first project.
Through the detailed implementation method, the bar packing machine can be fully automatically controlled by converting the bar packing machine into a related control program according to a fully automatic packing flow chart.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (2)
1. The full-automatic packing method for the cold-rolled deformed steel bar production line is realized on the existing semi-automatic packing machine and the manual conveying system of the cold-rolled deformed steel bar, and is characterized in that: the following method is adopted:
a: a length measuring roller is arranged between the manual conveying system and the semi-automatic packing machine, the length measuring roller is driven to rotate when the cold-rolled deformed steel bar is conveyed to the semi-automatic packing machine, a rotary encoder is arranged on the length measuring roller, and the rotary encoder is connected to the PLC control system;
b: a waiting position approach switch for detecting the cold-rolled deformed steel bar is arranged on a manual conveying system in front of a semi-automatic packing machine, the manual conveying system stops after the cold-rolled deformed steel bar triggers the waiting position approach switch, the cold-rolled deformed steel bar is positioned at a packing waiting position, a hoisting position approach switch for detecting the packed cold-rolled deformed steel bar is arranged on the manual conveying system behind the semi-automatic packing machine, the waiting hoisting is stopped after the packed cold-rolled deformed steel bar triggers the hoisting position approach switch, and after the hoisting is finished, a PLC control system receives a stop position approach switch signal; the manual conveying system is connected with a PLC control system to form a conveying system;
c: the method of dry contact is adopted to realize information exchange communication between the conveying system and the semi-automatic packing machine, and the information to be exchanged is as follows:
1. semi-automatic baling press is to conveying system:
1.1 preparing: the signal effectively indicates that the semi-automatic packing machine has no fault and is in a standby state at any time; if the semi-automatic packing machine is invalid, the semi-automatic packing machine is indicated to be in fault, and the conveying system is forbidden to feed materials to the semi-automatic packing machine;
1.2 in situ: the semi-automatic packing machine is positioned at the original point position at present after running in a manual or automatic mode, the signal is a safety interlocking signal, the conveying system is allowed to run when the signal is effective, and the material bundle can pass through the semi-automatic packing machine;
1.3, packaging is completed: when the semi-automatic packer finishes one turn, the signal is effective once, and the conveying system counts the number of turns by using the signal and takes the signal as a trigger signal for automatically controlling the next action of the flow;
1.4 response signal: in order to ensure the reliability of communication, the semi-automatic packing machine can correspondingly send 2 response signals to the conveying system after receiving 2 signals sent by the conveying system;
2. manual conveyer to semi-automatic baling press:
2.1 preparing: the conveying system is free of faults, and the semi-automatic packing machine is allowed to operate in an automatic mode;
2.2 packaging request: after the conveying system finishes packing and positioning once, the signal is effective once, and a packing request signal is sent to the semi-automatic packing machine;
2.3 response signal: after receiving the 3 signals sent by the semi-automatic packing machine, the conveying system can correspondingly send 3 response signals to the semi-automatic packing machine;
d: calculating the length of each turn according to the length of the bar, the number of packing turns, the distance between the head turn and the tail turn, wherein the distance between the head turn refers to the length between the first turn and the head of the bale; the tail turn distance refers to the length of the tail of the last turn-distance bale; obtaining the distance from each binding wire position to the head of the bale during packing, wherein the calculation formula is as follows:
ln = (Lc-Lh-Lt)/(n-1) + Lh (n is 2 or more)
In the above formula:
ln: the target position of the nth turn of the wrapping wire;
lc: the total length of the bar product to be packaged;
lh: a head turn distance;
and Lt: tail turn distance;
n: the total number of turns to be packed;
e: measuring the length of the material bundle passing through the central line of the semi-automatic packing machine in real time in the process of conveying the material bundle, stopping the conveying system when the length is equal to the length of a certain circle in the front n-1 circles, and beating the binding wires onto the material bundle by the operation of the semi-automatic packing machine;
the length of the bale passing through the centerline of the semi-automatic baler is obtained by:
Lg=Cp×(Lp/Pn)-Lb
in the above formula:
lg: the material bundle passes through the length of the central line of the semi-automatic packing machine;
cp: the PLC high-speed module receives the pulse number sent by the rotary encoder;
lp: measuring the perimeter of the length roller;
pn: the number of lines of the rotary encoder;
lb: measuring the distance from the length measuring roller to the central line of the semi-automatic packing machine;
f: e, after the semi-automatic packing machine operates to beat the binding wires on the material bundles, sending a signal to a conveying system, conveying the materials to the semi-automatic packing machine by the conveying system, and repeating the step E; binding wires at the (n-1) th turn position to the material bundle;
f: when the wire binding position of the nth turn is determined, the conveying system adopts time control, and the method specifically comprises the following steps: calculating the average value of the time for the conveying system to convey the length of the material bundle between the 1 st circle and the n-1 st circle between the adjacent circles in the control system, and adopting the average value of the time for the conveying system to stop feeding the semi-automatic packing machine after the n-1 circles of wire bundling is completed;
g: and after the nth turn of wire binding is finished, the conveying system conveys the material bundle to the hoisting position, after the material bundle triggers the hoisting position proximity switch, the conveying system stops, and the counting value of the length measuring counter is reset, and the counting value of the number of turns is reset.
2. The method for realizing full-automatic packing of the cold-rolled deformed steel bar production line according to claim 1, is characterized in that: d, considering the inertia distance of the conveying system when the distance between the head turn and the tail turn is set, wherein the inertia distance refers to a certain time period required from the control system sending a stop command to the complete stop of the conveying system, and the distance traveled by the material bundle conveyed by the conveying system in the time period; wherein: the head turn distance = the set head turn distance + the inertial distance; tail turn distance = set tail turn distance-inertial distance; the set head turn distance and the set tail turn distance refer to values set on a touch screen of the control system.
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| CN109178417A (en) | 2019-01-11 |
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