Bar acceleration roller way speed setting method and device

Abstract

The invention discloses a bar acceleration roller way speed setting method and device. The bar acceleration roller way speed setting method comprises the steps that S1, key parameters are determined; s2, acquiring a line difference value, and calculating a line difference correction LM; s3, selecting a steel separation point, correcting LM through a line difference, calculating a target sliding distance SF, calculating a minimum steel throwing speed # imgabs0 # through the target sliding distance SF, judging whether the minimum steel throwing speed # imgabs1 # is greater than an outlet linear speed V or not, and if yes, entering a rotating speed calculation and judgment process; if not, the steel splitting point is selected again, and the step S3 is executed again; s4, entering a rotating speed calculation and judgment process, calculating the motor rotating speed r corresponding to the minimum steel throwing speed # imgabs2 #, and judging whether the motor rotating speed r corresponding to the minimum steel throwing speed is smaller than the rated rotating speed of the motor or not; the device has the advantages of reasonably setting acceleration roller way speed, reducing spare part consumption cost and the like.

Description

Technical Field

[0001] The invention relates to the technical field of bar production, and in particular to a method and a device for setting the speed of a bar acceleration roller. Background Art

[0002] After the bars are rolled out from the finished product rack, they need to go through the steel throwing step and go to the cooling bed. In order to separate the multiple lengths of each section, it is necessary to accelerate the manufacturing time difference through the acceleration roller. The acceleration roller mainly accelerates the bars so that they can smoothly enter the skirt steel throwing system and be separated at the appropriate steel separation point. Usually after the steel separation point is confirmed, the speed of the acceleration roller has a theoretical critical value. If the speed after acceleration is lower than this value, the steel throwing will be disordered, and if it is higher than this value, the steel throwing will be normal. In the actual production process, since some of the acceleration rollers of the acceleration roller may be damaged, which may cause the steel throwing of some bars to be disordered, the production personnel usually set the steel throwing acceleration speed faster, so that even if some rollers are damaged, the steel throwing will not be disordered due to insufficient transmission force. However, if the speed is set too fast, the wear will be aggravated, the motor load will increase, which will make the roller more easily damaged, enter a vicious circle, continue to accelerate, and the damage frequency will be higher and faster, which will eventually make the production unstable.

[0003] Therefore, a method and device for setting the speed of a bar acceleration roller are provided to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is that production personnel usually set the speed of steel throwing acceleration to be relatively fast, so that even if part of the roller is damaged, the steel throwing will not be disordered due to insufficient transmission force. However, if the speed is set too fast, the wear will be aggravated, and the motor load will increase, which will make the roller more easily damaged, entering a vicious circle, and continuing to accelerate, the damage frequency will be higher and faster, and finally the production will be unstable, so a method and device for setting the speed of a bar acceleration roller are provided, and the method for setting the speed of a bar acceleration roller comprises: S1: Determine key parameters, including steel grade specification information, friction coefficient u between skirt plate and bar, outlet linear speed V, total length of cooling bed LC, distance LP from multiple shears to the starting point of cooling bed, distance D4 from the tail of bar to the starting point of cooling bed, diameter D of acceleration roller, distance Scs from steel dividing point to multiple shears, rated speed of motor and multiple length LM; S2: Get the linear difference value and calculate the linear difference correction LM; S3: Select the steel separation point, correct LM by line difference, calculate the target sliding distance SF, and calculate the minimum steel throwing speed by the target sliding distance SF , determine the minimum throwing speed Is it greater than the outlet linear speed V? If so, enter the speed calculation and judgment process; if not, reselect the steel dividing point and re-implement step S3; S4: Enter the speed calculation and judgment process to calculate the minimum steel throwing speed Corresponding motor speed r, determine whether the motor speed r corresponding to the minimum steel throwing speed is less than the motor rated speed. If so, determine that the acceleration roller speed is the minimum steel throwing speed. If not, replace the motor with a higher rated speed or reduce the outlet line speed and re-implement step S4.

[0005] Furthermore, the obtaining of the linear difference value and the calculation of the linear difference correction LM include: Get the line difference value and calculate the line difference correction LM = (1-line difference value) * multiple length.

[0006] Furthermore, the step of selecting the steel dividing point and calculating the target sliding distance SF includes: Select the steel dividing point and confirm the distance Scs from the steel dividing point to the multiple-length shear; the distance Scs from the steel dividing point to the multiple-length shear = the total length of the cooling bed LC + the distance LP from the multiple-length shear to the starting point of the cooling bed - the distance from the tail of the bar to the starting point of the cooling bed D4 - line difference correction LM - target sliding distance SF; Calculate the target sliding distance SF = total length of cooling bed LC + distance from multiple-length shear to the starting point of cooling bed LP - distance from the tail of bar to the starting point of cooling bed D4 - line difference correction LM - distance from dividing point to multiple-length shear Scs.

[0007] Furthermore, the minimum throwing speed is calculated by the target sliding distance SF. include: According to the target glide distance SF= Calculate the minimum throwing speed .

[0008] Furthermore, it also includes storing the steel type specification information and the minimum steel throwing speed in pairs.

[0009] On the other hand, the present application also provides a device for setting the speed of a bar acceleration roller, comprising: A parameter determination module is used to determine key parameters, including steel grade specification information, friction coefficient u between skirt plate and bar, outlet linear speed V, total length of cooling bed LC, distance LP from multiple shears to the starting point of cooling bed, distance D4 from the tail of bar to the starting point of cooling bed, diameter D of acceleration roller, distance Scs from steel dividing point to multiple shears, rated speed of motor and multiple length LM; Linear error correction calculation module, used to obtain the linear error value and calculate the linear error correction LM; The first judgment module is used to select the steel separation point, correct LM through line difference, calculate the target sliding distance SF, and calculate the minimum steel throwing speed through the target sliding distance SF. , determine the minimum throwing speed Is it greater than the outlet linear speed V? If so, enter the speed calculation and judgment process; if not, reselect the steel dividing point and re-implement step S3; The second judgment module is used to enter the speed calculation judgment process and calculate the minimum steel throwing speed. Corresponding motor speed r, determine whether the motor speed r corresponding to the minimum steel throwing speed is less than the motor rated speed. If so, determine that the acceleration roller speed is the minimum steel throwing speed. If not, replace the motor with a higher rated speed or reduce the outlet line speed and re-implement step S4; The storage module is used to store the steel type specification information and the minimum steel throwing speed in pairs.

[0010] The implementation of the present invention has the following beneficial effects: 1. The present invention considers motor capacity, production process requirements and various production parameters, and reasonably sets the roller speed for different specifications and processes, thereby achieving stable operation of production equipment. The present invention can calculate and reasonably set the acceleration roller speed, reduce spare parts consumption costs, and further estimate equipment capacity to select motors when designing production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a flow chart of the present invention; Figure 2 It is a schematic diagram of the device mechanism of the present invention; Figure 3 It is a schematic diagram of the steel throwing process of the present invention. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0013] Please refer to the attached drawings of the specification. The technical problem to be solved in this embodiment is that the technical problem to be solved by the present invention is that production personnel usually set the speed of steel throwing acceleration to be faster, so that even if part of the roller is damaged, the steel throwing will not be disordered due to insufficient transmission force. However, if the speed is set too fast, the wear will be aggravated and the motor load will increase, which will make the roller more easily damaged, entering a vicious circle, continuing to accelerate, the frequency of damage will be higher and faster, and ultimately making the production unstable, so a method and device for setting the speed of a bar acceleration roller are provided, and the method for setting the speed of a bar acceleration roller includes: S1: Determine key parameters, including steel grade specification information, friction coefficient u between skirt plate and bar, outlet linear speed V, total length of cooling bed LC, distance LP from multiple shears to the starting point of cooling bed, distance D4 from the tail of bar to the starting point of cooling bed, diameter D of acceleration roller, distance Scs from steel dividing point to multiple shears, rated speed of motor and multiple length LM; S2: Get the linear difference value and calculate the linear difference correction LM; S3: Select the steel separation point, correct LM by line difference, calculate the target sliding distance SF, and calculate the minimum steel throwing speed by the target sliding distance SF , determine the minimum throwing speed Is it greater than the outlet linear speed V? If so, enter the speed calculation and judgment process; if not, reselect the steel dividing point and re-implement step S3; S4: Enter the speed calculation and judgment process to calculate the minimum steel throwing speed Corresponding motor speed r, determine whether the motor speed r corresponding to the minimum steel throwing speed is less than the motor rated speed. If so, determine that the acceleration roller speed is the minimum steel throwing speed. If not, replace the motor with a higher rated speed or reduce the outlet line speed and re-implement step S4.

[0014] Obtaining the linear difference value and calculating the linear difference correction LM include: Get the line difference value and calculate the line difference correction LM = (1-line difference value) * multiple length.

[0015] Select the steel point and calculate the target sliding distance SF including: Select the steel dividing point and confirm the distance Scs from the steel dividing point to the multiple-length shear; the distance Scs from the steel dividing point to the multiple-length shear = the total length of the cooling bed LC + the distance LP from the multiple-length shear to the starting point of the cooling bed - the distance from the tail of the bar to the starting point of the cooling bed D4 - line difference correction LM - target sliding distance SF; Calculate the target sliding distance SF = total length of cooling bed LC + distance from multiple-length shear to the starting point of cooling bed LP - distance from the tail of bar to the starting point of cooling bed D4 - line difference correction LM - distance from dividing point to multiple-length shear Scs.

[0016] Calculate the minimum throwing speed by the target sliding distance SF include: According to the target glide distance SF= Calculate the minimum throwing speed .

[0017] It also includes storing the steel type specification information and the minimum steel throwing speed in pairs.

[0018] On the other hand, this embodiment also provides a device for setting the speed of a bar accelerating roller, comprising: The parameter determination module is used to determine the key parameters, including steel grade specification information, friction coefficient u between skirt plate and bar, outlet linear speed V, total length of cooling bed LC, distance LP from multiple shears to the starting point of cooling bed, distance D4 from the tail of bar to the starting point of cooling bed, diameter D of acceleration roller, distance Scs from steel dividing point to multiple shears, rated speed of motor and multiple length LM; Linear error correction calculation module, used to obtain the linear error value and calculate the linear error correction LM; The first judgment module is used to select the steel separation point, correct LM through line difference, calculate the target sliding distance SF, and calculate the minimum steel throwing speed through the target sliding distance SF. , determine the minimum throwing speed Is it greater than the outlet linear speed V? If so, enter the speed calculation and judgment process; if not, reselect the steel dividing point and re-implement step S3; The second judgment module is used to enter the speed calculation judgment process and calculate the minimum steel throwing speed. Corresponding motor speed r, determine whether the motor speed r corresponding to the minimum steel throwing speed is less than the motor rated speed. If so, determine that the acceleration roller speed is the minimum steel throwing speed. If not, replace the motor with a higher rated speed or reduce the outlet line speed and re-implement step S4; The storage module is used to store the steel type specification information and the minimum steel throwing speed in pairs. Example

[0019] This embodiment provides a method and device for setting the speed of a bar acceleration roller, and the method for setting the speed of a bar acceleration roller includes: S1: Determine the key parameters. A certain production line in a certain factory rolls 25 specifications, two cuts, the cooling bed length LC is 135m, the multiple length LM is 110m, the outlet line speed V is 12.2m / s, the distance between the tail of the bar and the starting point of the cooling bed (target throwing distance) D4 is 4m, the multiple shear distance to the cooling bed entrance LP is 101.5m, the diameter D of the acceleration roller is 188mm, the rated speed is 3000r / min, and the friction coefficient u between the skirt plate and the bar is 0.4; S2: Get the line difference value and calculate the line difference correction LM. Since there is a line difference (1%), the shorter value is used as the basis for steel calculation. The line difference correction LM=110*(1-2%)=108m; S3: The distance between the steel dividing point and the multiple shear Scs = LC + LP-D4-LM-SF. The steel dividing point can be adjusted, but it needs to be set at the hydraulic cylinder transmission position, which is a few fixed points in the skirt system. For the SF value, if you want to make As small as possible, Scs needs to be as large as possible; Select the steel dividing point farthest from the multiple-length shear (corresponding to Scs) and substitute it into SF= Calculate the minimum throwing speed ,like / V<1, then select the next farthest point for calculation until / V>1, then the calculated The minimum value (theoretically, as long as the speed of the accelerating roller after acceleration is greater than the outlet line speed, there will be no collision). Several points for steel separation (only points with hydraulic transmission can be used as steel separation points) are 71.5m, 75.1m, 78.7m, 82.3m, 85.9m, 89.5m, 93.1m respectively; Scs= LC+LP-D4-LM-SF=135m+101.5m-4m-108m-SF; When Scs is 93.1m, the minimum value is calculated. =15.62; S4: Enter the speed calculation and judgment process to calculate the minimum steel throwing speed The corresponding motor speed r is calculated by the following formula: =π*D*r, speed r=2644r / min, it is determined that the motor speed r corresponding to the minimum steel throwing speed is 2644r / min, which is less than the motor rated speed of 3000r / min, and the acceleration roller speed is determined to be the minimum steel throwing speed; The steel grade specification information and the minimum steel throwing speed are stored in pairs. Example

[0020] S1: Determine the key parameters. A certain production line in a certain factory rolls 32 specifications, external standard materials (steel throwing temperature 550℃), single line, cooling bed length LC is 135m, multiple length LM is 122m, the average exit line speed V of the final rolling is 14.5m / s, the distance between the tail of the bar and the starting point of the cooling bed (target steel throwing distance) D4 is 4m, the multiple shear distance from the cooling bed entrance LP is 101.5m, and the diameter of the acceleration roller D is 188mm. The rated speed is 3000r / min, and the friction coefficient u between the skirt plate and the bar is 0.53 S2: Get the line difference value. Since there is no line difference in the single line, no correction is required, that is, LM=0.

[0021] S3: The distance between the steel dividing point and the multiple shear Scs = LC + LP-D4-LM-SF. The steel dividing point can be adjusted, but it needs to be set at the hydraulic cylinder transmission position, which is a few fixed points in the skirt system. For the SF value, if you want to make As small as possible, Scs needs to be as large as possible; Select the steel dividing point farthest from the multiple-length shear (corresponding to Scs) and substitute it into SF= In the formula, calculate ,like / V<1, then select the next farthest point for calculation until / V>1, then the calculated The minimum value (theoretically, as long as the speed of the accelerating roller after acceleration is greater than the outlet line speed, there will be no collision). Several points for steel separation (only points with hydraulic transmission can be used as steel separation points), are 71.5m, 75.1m, 78.7m, 82.3m, 85.9m, 89.5m.

[0022] Scs= LC+LP-D4-LM-SF=135m+101.5m-4m-122m-SF When Scs is 93.1m, SF=17.4, the minimum value is calculated. =13.44m / s. This value is less than the outlet linear velocity V and does not meet the condition; Take the next farthest point Scs1 = 89.5m and recalculate 1 = 14.76m / s. Since 14.76m / s is the average steel throwing speed after the acceleration roller is accelerated, there may be slippage, thus causing fluctuations. / V equal to 1 does not meet the condition; We need to take a closer value, Scs2 = 85.91, and then we get 2=15.99m / s, meets the conditions.

[0023] S4: Calculate the minimum In this case, the corresponding speed can be compared with the rated speed to select the motor. Substituting the linear speed and rotation speed calculation formula, we can get the rotation speed r1=1624r / min, which is less than the rated speed and meets the conditions; The steel grade specification information and the minimum steel throwing speed are stored in pairs.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for setting the speed of a bar acceleration roller, characterized in that: include: S1: Determine key parameters, including steel grade specification information, friction coefficient u between skirt plate and bar, outlet linear speed V, total length of cooling bed LC, distance LP from multiple shears to the starting point of cooling bed, distance D4 from the tail of bar to the starting point of cooling bed, diameter D of acceleration roller, distance Scs from steel dividing point to multiple shears, rated speed of motor and multiple length LM; S2: Get the linear difference value and calculate the linear difference correction LM; S3: Select the steel separation point, correct LM by line difference, calculate the target sliding distance SF, and calculate the minimum steel throwing speed by the target sliding distance SF , determine the minimum throwing speed Is it greater than the outlet linear velocity V? If so, enter the speed calculation and judgment process; If not, reselect the steel dividing point and re-implement step S3; S4: Enter the speed calculation and judgment process to calculate the minimum steel throwing speed Corresponding motor speed r, determine whether the motor speed r corresponding to the minimum steel throwing speed is less than the motor rated speed. If so, determine that the acceleration roller speed is the minimum steel throwing speed. If not, replace the motor with a higher rated speed or reduce the outlet line speed and re-implement step S4.

2. The method for setting the speed of a bar accelerating roller according to claim 1, characterized in that: The obtaining of the linear difference value and the calculation of the linear difference correction LM include: Get the line difference value and calculate the line difference correction LM = (1-line difference value) * multiple length.

3. The method for setting the speed of a bar accelerating roller according to claim 2, characterized in that: The step of selecting the steel dividing point and calculating the target sliding distance SF comprises: Select the steel dividing point and confirm the distance Scs from the steel dividing point to the multiple-length shear; the distance Scs from the steel dividing point to the multiple-length shear = the total length of the cooling bed LC + the distance LP from the multiple-length shear to the starting point of the cooling bed - the distance from the tail of the bar to the starting point of the cooling bed D4 - line difference correction LM - target sliding distance SF; Calculate the target sliding distance SF = total length of cooling bed LC + distance from multiple-length shear to the starting point of cooling bed LP - distance from the tail of bar to the starting point of cooling bed D4 - line difference correction LM - distance from dividing point to multiple-length shear Scs.

4. The method for setting the speed of a bar accelerating roller according to claim 3, characterized in that: The minimum throwing speed is calculated by the target sliding distance SF include: According to the target glide distance SF= Calculate the minimum throwing speed .

5. The method for setting the speed of a bar accelerating roller according to claim 1, characterized in that: It also includes storing the steel type specification information and the minimum steel throwing speed in pairs.

6. A device for setting the speed of a bar accelerating roller, characterized in that: include: A parameter determination module is used to determine key parameters, including steel grade specification information, friction coefficient u between skirt plate and bar, outlet linear speed V, total length of cooling bed LC, distance LP from multiple shears to the starting point of cooling bed, distance D4 from the tail of bar to the starting point of cooling bed, diameter D of acceleration roller, distance Scs from steel dividing point to multiple shears, rated speed of motor and multiple length LM; Linear error correction calculation module, used to obtain the linear error value and calculate the linear error correction LM; The first judgment module is used to select the steel separation point, correct LM through line difference, calculate the target sliding distance SF, and calculate the minimum steel throwing speed through the target sliding distance SF. , determine the minimum throwing speed Is it greater than the outlet linear velocity V? If so, enter the speed calculation and judgment process; If not, reselect the steel dividing point and re-implement step S3; The second judgment module is used to enter the speed calculation judgment process and calculate the minimum steel throwing speed. Corresponding motor speed r, determine whether the motor speed r corresponding to the minimum steel throwing speed is less than the motor rated speed. If so, determine that the acceleration roller speed is the minimum steel throwing speed. If not, replace the motor with a higher rated speed or reduce the outlet line speed and re-implement step S4; The storage module is used to store the steel type specification information and the minimum steel throwing speed in pairs.

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