Sensorless roll diameter measuring and calculating method

Abstract

The invention relates to the technical field of steel wire rod production and manufacturing, and discloses a sensorless roll diameter measuring and calculating method, which measures and calculates the diameter of a material disc when equipment is started and operated: # imgabs0 #, and the calculating method comprises the following steps: a material discharging motor drives a material discharging disc to rotate, a wire rod is sent out rightwards, and the wire rod is driven by a material pulling wheel to be pulled rightwards after passing through a guide wheel a, a tension wheel and a guide wheel b; the material pulling wheel pulls the wire at the linear speed V1, the active discharging motor drives the discharging disc to rotate at the rotating speed omega 1, and the value of omega 1 is obtained according to the formula # imgabs 1 #; 3, the actual diameter is smaller than the preset diameter, a tension wheel is pulled upwards by L distance, the actual wire length is 2 L, # imgabs2 is used for calculating the linear speed of an active discharging disc, # imgabs3 is obtained through arrangement, # imgabs4 is obtained in the same sampling period, the formula is simplified as # imgabs5, the enterprise cost is effectively reduced, operation is easy for workers, the cost is reduced, and the working efficiency is improved. And parameter setting is not needed any more, the device can adapt to the diameter of the material disc, manual zero clearing and resetting and other operations are not needed, and the convenience degree is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel wire production and manufacturing, and in particular to a sensorless coil diameter measurement method. Background Art

[0002] During the production process of the take-up and pay-off equipment, the speed of the take-up machine tray will decrease as the diameter of the material increases; while the speed of the discharge machine tray will increase as the diameter of the material decreases. After replacing the tray, especially when replacing a non-full tray (discharging) or a non-empty tray (receiving), since the equipment does not know the actual diameter of the new tray, serious synchronization problems will occur during startup, deceleration and shutdown, and process acceleration and deceleration.

[0003] There are generally three methods to measure or calculate the roll diameter.

[0004] Speed ​​calculation method:

[0005] Where, D: diameter of the tray; (unknown, to be solved);

[0006] ω: The speed of the unloading tray; (can be obtained by converting the output frequency of the inverter);

[0007] V: Rewinding: the actual linear speed on the rewinding side; Active unwinding: the actual linear speed on the unwinding side. (When the tray diameter is unknown, the actual linear speed cannot be calculated based on the unwinding tray speed) An external linear speed sensor needs to be added to obtain the linear speed V.

[0008] Direct measurement of coil diameter: It is necessary to add a displacement sensor (such as an ultrasonic displacement sensor) externally to directly measure the diameter of the tray. For example, first measure the displacement value when the tray is empty, then measure it again after replacing the tray to obtain the new displacement value, and subtract the two to obtain the new diameter of the tray.

[0009] Speed ​​integration method: Accumulate or subtract the number of turns of the material tray according to the material thickness. For wire materials, the number of turns per layer must also be set (or the coil diameter is accumulated according to the reversal to the edge). Manual reset is required after replacing the material tray.

[0010] Speed ​​calculation method: requires the purchase of a linear speed sensor, which increases organization and costs.

[0011] Direct measurement of roll diameter: requires the purchase of external sensors, such as ultrasonic displacement sensors, which are often expensive.

[0012] Speed ​​integration method: parameter setting is complicated.

[0013] In the document CN 115344810 A, a roll diameter calculation method, device, electronic device and storage medium are disclosed, including: obtaining the reel length data of the material roll within the unit sampling interval, and the rotation angle data of the reel within the unit sampling interval; calculating the initial roll diameter data of the reel within the unit sampling interval according to the reel length data and the rotation angle data; performing zero-phase filtering on the initial roll diameter data to obtain the intermediate roll diameter data after filtering; fitting the intermediate roll diameter data to obtain the fitted target roll diameter data. This method of calculating the roll diameter requires more measurement data and is relatively complicated.

[0014] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the invention

[0015] In order to solve the above problems, the present invention discloses a sensorless roll diameter measurement method, which effectively reduces enterprise costs and is simple to operate for workers. There is no need to set parameters. It is simple and fast, can adapt to the diameter of the material tray, and does not require manual zeroing and resetting operations, thereby improving convenience.

[0016] The technical solution of the present invention is: a sensorless coil diameter measurement method, which measures the diameter of the material tray when the equipment is started: Among them, D x is the diameter of the unloading tray; V is the linear speed of the subsequent pulling wheel; L is the displacement value of the tension wheel, and the speed of the unloading tray, and its calculation method includes the following steps:

[0017] Step 1: The unloading motor drives the unloading tray to rotate and sends the wire to the right. After the wire passes through the guide wheel a, the tension wheel and the guide wheel b, it is driven by the pulling wheel to the right;

[0018] Step 2: The puller wheel moves at a linear speed V 1 The wire is pulled and the active unloading motor drives the unloading tray at a speed of ω 1 Rotation, ω 1 The value is based on the formula get;

[0019] Among them, ω 1 is the speed of the unloading tray, V 1 D is the linear speed of the rear puller wheel, 1 Preset diameter for the discharge tray;

[0020] Step 3: The actual diameter is smaller than the preset diameter, causing the tension wheel to pull up a distance of L. The actual wire length is 2L, where

[0021] Among them, L is the displacement value of the tension wheel, t is the sampling interval time, V 2 It is the linear speed of the active unloading tray;

[0022] Step 4: Calculate the linear speed of the active unloading tray.

[0023] Among them, D x is the diameter of the tray to be solved, ω 1 is the speed of the discharge tray;

[0024] Step 5: Arrange the above formula to get the diameter calculation formula of the material tray.

[0025] Among them, V 1 is the linear speed of the rear puller wheel, L is the displacement value of the tension wheel, ω 1 is the actual speed of the discharge tray, and t is the sampling interval;

[0026] Step 6: The sampling data of linear velocity, rotation speed and displacement are all obtained in the same sampling period t = 0.1s. Therefore, the formula in step 5 is further simplified to:

[0027] Among them, V 1 is the linear speed of the rear puller wheel, L is the displacement value of the tension wheel, ω 1 It is the actual speed of the discharge tray.

[0028] Preferably, the speed of the discharge tray in step 2 is 1 , the unit is revolutions / s, the linear speed of the rear puller wheel V 1 , unit is mm / s, the preset diameter of the discharge tray is D 1 , the unit is mm, the maximum diameter of the tray is used for active material discharge, and the minimum diameter of the tray is used for material collection.

[0029] Preferably, the output frequency of the downstream pulling wheel linear speed inverter and the actual output speed of the motor are converted in a linear proportional relationship. The diameter of the discharge tray is a fixed diameter value on the discharge tray. For trays of different specifications, the inner and outer diameter data of the discharge tray will be opened to the on-site human-computer interaction interface, and manual settings will be performed when replacing trays of different specifications.

[0030] Preferably, L in step 3 is the displacement value of the tension wheel, which is obtained through a tension sensor in units of mm, and t is the sampling interval. The sampling time is set as a timing time, and the value of the relevant sensor is read after the time is up.

[0031] Preferably, the wire on the discharge tray passes through the guide wheel a and the tension wheel, the guide wheel a is located inside the wire, the guide wheel a and the upper surface of the discharge tray are at the same height, and the discharge tray, the guide wheel a and the tension wheel form a right triangle with the guide wheel a as a right angle.

[0032] Preferably, the wire comes out from the bottom of the tension wheel and is pulled to the right by the pulling wheel from above the guide wheel b, and the guide wheel a and the guide wheel b are at the same height.

[0033] Preferably, the distance between the guide wheel a and the guide wheel b is the diameter of the tension wheel, the tension wheel is located below the guide wheel a and the guide wheel b, and the tension wheel, the guide wheel b and the pulling wheel form a right triangle with the guide wheel b as a right angle.

[0034] Advantages of the present invention: 1. The present invention does not require additional sensors to measure the roll diameter, effectively saving costs. It only needs to measure relevant parameters and calculate them through corresponding formulas.

[0035] 2. The material tray of the present invention can be directly obtained by calculation, and the calculation of the coil diameter can be realized without the need for workers to perform complex operations such as zeroing and resetting, thereby reducing the error caused by manual intervention and improving the accuracy of the coil diameter.

[0036] 3. The present invention effectively reduces enterprise costs and is simple to operate for workers. It does not require parameter setting, is simple and fast, can adapt to the diameter of the material tray, and does not require manual zeroing and resetting operations, thereby improving convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the positional relationship of the unloading tray, the guide wheel, the tension wheel and the pulling wheel of the present invention;

[0038] Among them: 1. unloading tray, 2. guide wheel a, 3. tension wheel, 4. guide wheel b, 5. pulling wheel. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0040] like Figure 1 As shown in the figure, a sensorless coil diameter measurement method is used to measure the diameter of the material tray when the equipment is started: Among them, D x is the diameter of the unloading tray 1; V is the linear speed of the rear puller wheel 5; L is the displacement value of the tension wheel 3, ω 1 is the speed of the unloading tray 1, and its calculation method includes the following steps:

[0041] Step 1: The discharge motor drives the discharge tray 1 to rotate, and the wire is sent to the right. After passing through the guide wheel a2, the tension wheel 3 and the guide wheel b4, the wire is driven by the pulling wheel 5 to be pulled to the right;

[0042] Step 2: The pulling wheel 5 moves at a linear speed V 1 The wire is pulled and the active unloading motor drives the unloading tray 1 at a speed of ω1 Rotation, ω 1 The value is based on the formula get;

[0043] Among them, ω 1 is the speed of the unloading tray 1, in revolutions / s, V 1 D is the linear speed of the rear puller wheel 5, in mm / s. 1 Preset diameter for unloading tray 1, in mm. Active unloading is substituted by the maximum diameter of the tray, and collecting is substituted by the minimum diameter of the tray.

[0044] Step 3: The actual diameter is smaller than the preset diameter, causing the tension wheel 3 to pull up a distance L, then the actual wire length is 2L, where

[0045] Among them, L is the displacement value of tension wheel 3, which is obtained by the tension sensor, and the unit is mm. T is the sampling interval time. The sampling time is set as the timing time. After the time is up, the value of the relevant sensor is read. V 2 It is the linear speed of the active unloading tray;

[0046] Step 4: Calculate the linear speed of the active unloading tray.

[0047] Among them, D x is the diameter of the tray to be solved, ω 1 is the speed of the discharge tray;

[0048] Step 5: Arrange the above formula to get the diameter calculation formula of the material tray.

[0049] Among them, V 1 is the linear speed of the rear puller wheel, L is the displacement value of the tension wheel, ω 1 is the actual speed of the unloading tray 1, and t is the sampling interval;

[0050] Step 6: The sampling data of linear velocity, rotation speed and displacement are all obtained in the same sampling period t = 0.1s. Therefore, the formula in step 5 is further simplified to:

[0051] Among them, V 1 is the linear speed of the rear puller wheel 5, L is the displacement value of the tension wheel, ω 1 It is the actual speed of the discharge tray.

[0052] The output frequency of the linear speed inverter of the rear-stage pulling wheel 5 and the actual output speed of the motor are converted in a linear proportional relationship. The diameter of the discharge tray is a fixed diameter value on the discharge tray. For trays of different specifications, the inner and outer diameter data of the discharge tray will be opened to the on-site human-computer interaction interface, and manual settings will be performed when replacing trays of different specifications.

[0053] The wire of the discharge tray 1 passes through the guide wheel a2 and the tension wheel 3. The guide wheel a2 is located on the inner side of the wire. The guide wheel a2 and the upper surface of the discharge tray 1 are at the same height. The discharge tray 1, the guide wheel a2 and the tension wheel 3 form a right triangle with the guide wheel a2 as a right angle. The wire comes out from the bottom of the tension wheel 3 and is pulled to the right from above the guide wheel b4 by the pulling wheel 5. The guide wheel a2 and the guide wheel b4 are at the same height. The distance between the guide wheel a2 and the guide wheel b4 is the diameter of the tension wheel 3. The tension wheel 3 is located below the guide wheel a2 and the guide wheel b4. The tension wheel 3, the guide wheel b4 and the pulling wheel 5 form a right triangle with the guide wheel b4 as a right angle.

[0054] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention, and the purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A sensorless roll diameter measurement method, characterized in that: Calculate the diameter of the tray when the equipment is started: Among them, D x is the diameter of the unloading tray; V is the linear speed of the subsequent pulling wheel; L is the displacement value of the tension wheel, and the speed of the unloading tray, and its calculation method includes the following steps: Step 1: The unloading motor drives the unloading tray to rotate and sends the wire to the right. After the wire passes through the guide wheel a, the tension wheel and the guide wheel b, it is driven by the pulling wheel to the right; Step 2: The pulling wheel pulls the wire at a linear speed of V1, and the active unloading motor drives the unloading plate to rotate at a speed of ω1. The value of ω1 is based on the formula get; Among them, ω1 is the speed of the unloading tray, V1 is the linear speed of the rear puller wheel, and D1 is the preset diameter of the unloading tray; Step 3: The actual diameter is smaller than the preset diameter, causing the tension wheel to pull up a distance of L. The actual wire length is 2L, where Among them, L is the displacement value of the tension wheel, t is the sampling interval time, and V2 is the linear speed of the active unloading disk; Step 4: Calculate the linear speed of the active unloading tray. Among them, D x is the diameter of the material tray to be solved, ω1 is the rotation speed of the material tray; Step 5: Arrange the above formula to get the diameter calculation formula of the material tray. Among them, V1 is the linear speed of the downstream pulling wheel, L is the displacement value of the tension wheel, ω1 is the actual speed of the unloading tray, and t is the sampling interval time; Step 6: The sampling data of linear velocity, rotation speed and displacement are all obtained in the same sampling period t = 0.1s. Therefore, the formula in step 5 is further simplified to: Among them, V1 is the linear speed of the downstream pulling wheel, L is the displacement value of the tension wheel, and ω1 is the actual speed of the unloading tray.

2. A sensorless roll diameter measurement method according to claim 1, characterized in that: The speed of the discharge tray in step 2 is ω1, the unit is revolutions per second, the linear speed of the rear-stage pulling wheel is V1, the unit is mm / s, the preset diameter of the discharge tray is D1, the unit is mm, the maximum diameter of the tray is used for active discharge, and the minimum diameter of the tray is used for collecting.

3. A sensorless roll diameter measurement method according to claim 2, characterized in that: The output frequency of the linear speed inverter of the downstream pulling wheel and the actual output speed of the motor are converted in a linear proportional relationship. The diameter of the discharge tray is a fixed diameter value on the discharge tray. For trays of different specifications, the inner and outer diameter data of the discharge tray will be opened to the on-site human-computer interaction interface, and manual settings will be performed when replacing trays of different specifications.

4. The sensorless roll diameter measurement method according to claim 1, characterized in that: L in step 3 is the displacement value of the tension wheel, which is obtained through the tension sensor and is expressed in mm. T is the sampling interval, and the sampling time is set as a timing time. When the time is up, the value of the relevant sensor is read.

5. The sensorless roll diameter measurement method according to claim 1, characterized in that: The wire of the discharge tray passes through the guide wheel a and the tension wheel, the guide wheel a is located inside the wire, the guide wheel a and the upper surface of the discharge tray are at the same height, and a right triangle is formed between the discharge tray, the guide wheel a and the tension wheel with the guide wheel a as a right angle.

6. The sensorless roll diameter measurement method according to claim 1, characterized in that: The wire comes out from the bottom of the tension wheel and is driven by the pulling wheel to the right from above the guide wheel b. The guide wheel a and the guide wheel b are at the same height.

7. The sensorless roll diameter measurement method according to claim 1, characterized in that: The distance between the guide wheel a and the guide wheel b is the diameter of the tension wheel. The tension wheel is located below the guide wheel a and the guide wheel b. The tension wheel, the guide wheel b and the pulling wheel form a right triangle with the guide wheel b as a right angle.

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