Sectional stepping pressing control method for wrapper roller and winding drum

Abstract

The invention provides a wrapper roller subsection stepping pressing control method and a winding drum, and the method comprises the following steps: S1, at the beginning of winding, a wrapper roller uses a stepping control method to wind strip steel on the winding drum until a preset requirement is met; and S2, the wrapper roller winds the strip steel on a winding drum in a pressure control mode until winding is completed. According to the method, a stepping control method and a pressure control method are combined, so that mechanical equipment such as a wrapper roller and a winding drum can be prevented from being impacted, and interlayer gaps are reduced while imprint is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coiling technology, and in particular to a method for controlling a coiling roller to step down in sections and a coiling drum. Background Art

[0002] The step control method can avoid the head of the steel coil from damaging the inner surface of the strip during the first few turns of coiling and avoid the mechanical equipment such as the auxiliary coil roller and the reel from being impacted. Because when coiling in the usual way, before the coiling tension is established, the auxiliary coil roller is always tightly pressed against the strip. In this way, when the second turn of coiling begins, the head of the strip passes through the auxiliary coil roller again, causing an impact on the auxiliary coil roller, which often causes damage to the inner surface of the steel coil, so that the head of the steel coil cannot be well utilized.

[0003] 1# and 3# auxiliary winding rollers have full-stroke pressing function and tail pressing function. When the auxiliary winding roller is put into full-stroke pressing control, the auxiliary winding roller presses against the steel coil according to the set pressure during the whole coiling process, and when the pressure increases and exceeds the set value, the auxiliary winding roller opens to the outer edge of the steel coil after the next circle of strip steel is wound and waits. When coiling thick and hard strip steel, the full-stroke pressing function should be put into use to increase the bending moment and reduce the interlayer gap. Summary of the invention

[0004] In view of the defects in the prior art, the object of the present invention is to provide a method for controlling the stepping down of a winding roller and a winding drum.

[0005] A method for controlling the stepping down of a winding roller according to the present invention includes:

[0006] Step S1: At the beginning of coiling, the auxiliary coiling roller uses a step control method to wind the strip on the reel until the preset requirements are met;

[0007] Step S2: The auxiliary winding roller uses pressure control to wind the strip steel onto the reel until the winding is completed.

[0008] Preferably, the method further comprises: before the start of winding, all the auxiliary winding rollers are in a position adjustment mode and are positioned according to the initial roller gap of the auxiliary winding rollers.

[0009] Preferably, before the coiling starts, the initial parameters of the coiling roller are configured, including: the set thickness H of the strip, the set coefficient Ks and the HMI roll gap correction OF, and the initial roll gap g of the coiling roller is calculated;

[0010] The initial roll gap g of the auxiliary roll includes:

[0011] g=H*Ks+OF.

[0012] Preferably, the step S1 comprises:

[0013] Step S1.1: After the head of the strip passes through a certain auxiliary winding roller, the certain auxiliary winding roller switches to a pressure adjustment method until the head of the strip is about to complete the first circle;

[0014] Step S1.2: When the strip head is about to complete the first circle and approaches the first passing auxiliary winding roller again, the current auxiliary winding roller jumps, and the strip head passes through the current auxiliary winding roller. The control method of the current auxiliary winding roller will be switched to pressure control and press against the steel coil according to the preset pressure; step S1.2 is triggered repeatedly until the roll load and tension are established;

[0015] Step S1.3: Select a certain auxiliary winding roller. When the head of the strip approaches the current auxiliary winding roller again, the current auxiliary winding roller jumps, and the head of the strip passes through the current auxiliary winding roller. The control method of the current auxiliary winding roller will switch to pressure control and press against the steel coil according to the preset pressure. Other unselected auxiliary winding rollers always remain in the open state; repeatedly trigger step S1.3 until the preset requirements are met.

[0016] Preferably, the establishment of the reel load and tension includes: the current motor torque of the reel reaches 80% of the set motor torque.

[0017] Preferably, the step S1 comprises: when the head of the strip approaches the preset auxiliary winding roller, the current auxiliary winding roller jumps, and the jumping distance is calculated based on the thickness of the strip plus a fixed value;

[0018] The fixed values ​​include:

[0019] Fixed value = H*(2-0.8*H / H_max)

[0020] Among them, H represents the set thickness of the strip steel; H_max represents the maximum thickness of the steel plate that the current unit can roll.

[0021] Preferably, the step S2 comprises: the auxiliary winding roller uses a constant pressure control method to wind the strip steel on the reel until the winding is completed.

[0022] Preferably, if the full-stroke pressing is not selected, the auxiliary winding roller opens after stepping n times, and the opening process includes: first opening the distance of the strip thickness according to the valve opening of the stepping jump, and then opening according to the normal opening.

[0023] Preferably, the valve opening is obtained through a PID regulator based on the position of the step and the pressure.

[0024] A reel provided according to the present invention is wound by using the above-mentioned step-by-step pressing control method for the auxiliary winding roller.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention combines the step control method with the pressure control method, which can prevent mechanical equipment such as auxiliary rolls and reels from being impacted, reduce head imprinting, and reduce interlayer gaps;

[0027] 2. The present invention first adopts stepping control of all the auxiliary winding rollers, then selects a certain auxiliary winding roller that is fully pressed down to continue stepping and the other auxiliary winding rollers are opened, and then selects a certain auxiliary winding roller that is fully pressed down to enter pressure control until the unloading of the coil begins; the head part can be well utilized by stepping for several circles, and the auxiliary winding roller that is fully pressed down can increase the bending moment and reduce the interlayer gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0029] Figure 1 This is a schematic diagram of the control method of the segmented stepping pressure of the auxiliary winding roller. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0031] Example 1

[0032] A method for controlling the stepping down of a winding roller according to the present invention includes:

[0033] Step S1: At the beginning of coiling, the auxiliary coiling roller uses a step control method to wind the strip on the reel until the preset requirements are met;

[0034] Step S2: The auxiliary winding roller uses pressure control to wind the strip steel onto the reel until the winding is completed.

[0035] Specifically, the method further comprises: before the start of winding, all the auxiliary winding rollers are in a position adjustment mode and are positioned according to the initial roller gap of the auxiliary winding rollers.

[0036] Specifically, before the coiling starts, the initial parameters of the coiling roller are configured, including: the set thickness H of the strip, the set coefficient Ks and the HMI roll gap correction OF, and the initial roll gap g of the coiling roller is calculated;

[0037] The initial roll gap g of the auxiliary roll includes:

[0038] g=H*Ks+OF.

[0039] Specifically, the step S1 includes:

[0040] Step S1.1: After the head of the strip passes through a certain auxiliary winding roller, the certain auxiliary winding roller switches to a pressure adjustment method until the head of the strip is about to complete the first circle;

[0041] Step S1.2: When the strip head is about to complete the first circle and approaches the first passing auxiliary winding roller again, the current auxiliary winding roller jumps, and the strip head passes through the current auxiliary winding roller. The control method of the current auxiliary winding roller will be switched to pressure control and press against the steel coil according to the preset pressure; step S1.2 is triggered repeatedly until the roll load and tension are established;

[0042] Step S1.3: Select a certain auxiliary winding roller. When the head of the strip approaches the current auxiliary winding roller again, the current auxiliary winding roller jumps, and the head of the strip passes through the current auxiliary winding roller. The control method of the current auxiliary winding roller will switch to pressure control and press against the steel coil according to the preset pressure. Other unselected auxiliary winding rollers always remain in the open state; repeatedly trigger step S1.3 until the preset requirements are met.

[0043] Specifically, the establishment of the reel load and tension includes: the current motor torque of the reel reaches 80% of the set motor torque.

[0044] Specifically, the step S1 includes: when the head of the strip approaches the preset auxiliary winding roller, the current auxiliary winding roller jumps, and the jumping distance is calculated based on the thickness of the strip plus a fixed value;

[0045] The fixed values ​​include:

[0046] Fixed value = H*(2-0.8*H / H_max)

[0047] Among them, H represents the set thickness of the strip steel; H_max represents the maximum thickness of the steel plate that the current unit can roll.

[0048] Specifically, the step S2 includes: the auxiliary winding roller uses a constant pressure control method to wind the strip steel on the reel until the winding is completed.

[0049] Specifically, if the auxiliary winding roller is not pressed down throughout the entire process, it is opened after it steps on n circles. The opening process includes: firstly opening the distance of the strip thickness according to the valve opening of the stepping jump, and then opening according to the normal opening.

[0050] Specifically, the valve opening is obtained through a PID regulator based on the position of the step and the pressure.

[0051] A reel provided according to the present invention is wound by using the above-mentioned step-by-step pressing control method for the auxiliary winding roller.

[0052] Example 2

[0053] Embodiment 2 is a preferred embodiment of Embodiment 1

[0054] According to a method for controlling the stepping down of a winding roller provided by the present invention, Figure 1 As shown, including:

[0055] When the strip enters the pinch roll, all the auxiliary rolls are in position adjustment mode and positioned according to the predetermined roll gap; this roll gap is slightly larger than the strip thickness, allowing the strip to pass smoothly. The position of each auxiliary roll is calculated separately, so that a channel is formed between the auxiliary roll and the drum that is conducive to the passage of the strip.

[0056] The strip head passes through the No. 1 (No. 2 or No. 3) auxiliary winding roller. After the strip head passes, the auxiliary winding roller switches to pressure adjustment mode until the strip is about to complete the first circle.

[0057] The strip head approaches the No. 1 (No. 2 or No. 3) auxiliary roll again, and the first jump of the No. 1 auxiliary roll begins. The jump distance is calculated based on the strip thickness plus a fixed value. The strip passes through the No. 1 (No. 2 or No. 3) auxiliary roll, and the No. 1 auxiliary roll control will switch to pressure control and press against the steel coil at a preset pressure. Step in this way until the roll load and tension are established; the auxiliary roll that is not fully pressed will open after stepping n turns. The opening process first opens the distance of the strip thickness according to the valve opening of the step jump, and then opens according to the normal opening.

[0058] Select a certain auxiliary winding roller. When the head of the strip approaches the current auxiliary winding roller again, the current auxiliary winding roller will jump. The head of the strip passes through the current auxiliary winding roller. The control method of the current auxiliary winding roller will be switched to pressure control and pressed against the steel coil according to the preset pressure. Other unselected auxiliary winding rollers will always remain in the open state; repeat this stepping until the preset requirements are met; select the auxiliary winding roller that is pressed down throughout the process and then step m times to enter constant pressure control.

[0059] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A method for controlling the stepping down of a winding roller, characterized in that: include: Step S1: At the beginning of coiling, the auxiliary coiling roller uses a step control method to wind the strip on the reel until the preset requirements are met; Step S2: The auxiliary winding roller uses pressure control to wind the strip steel onto the reel until the winding is completed.

2. The method for controlling the step-down pressing of the winding roller according to claim 1 is characterized in that: The method further comprises: before the winding starts, all the auxiliary winding rollers are in a position adjustment mode and are positioned according to the initial roller gap of the auxiliary winding rollers.

3. The method for controlling the step-down pressing of the winding roller according to claim 2 is characterized in that: Before the coiling starts, the initial parameters of the coiling roller are configured, including: the set thickness H of the strip, the set coefficient Ks and the HMI roll gap correction OF, and the initial roll gap g of the coiling roller is calculated; The initial roll gap g of the auxiliary roll includes: g=H*Ks+OF.

4. The method for controlling the step-down pressing of the winding roller according to claim 1 is characterized in that: The step S1 comprises: Step S1.1: After the head of the strip passes through a certain auxiliary winding roller, the certain auxiliary winding roller switches to a pressure adjustment method until the head of the strip is about to complete the first circle; Step S1.2: When the strip head is about to complete the first circle and approaches the first passing auxiliary winding roller again, the current auxiliary winding roller jumps, and the strip head passes through the current auxiliary winding roller. The control method of the current auxiliary winding roller will be switched to pressure control and press against the steel coil according to the preset pressure; step S1.2 is triggered repeatedly until the roll load and tension are established; Step S1.3: Select a certain auxiliary winding roller. When the head of the strip approaches the current auxiliary winding roller again, the current auxiliary winding roller jumps, and the head of the strip passes through the current auxiliary winding roller. The control method of the current auxiliary winding roller will switch to pressure control and press against the steel coil according to the preset pressure. Other unselected auxiliary winding rollers always remain in the open state; repeatedly trigger step S1.3 until the preset requirements are met.

5. The method for controlling the step-down pressing of the winding roller according to claim 4 is characterized in that: The establishment of the reel load and tension includes: the current motor torque of the reel reaches 80% of the set motor torque.

6. The method for controlling the step-down pressing of the winding roller according to claim 4, characterized in that: The step S1 comprises: when the head of the strip approaches the preset auxiliary winding roller, the current auxiliary winding roller jumps, and the jumping distance is calculated based on the thickness of the strip plus a fixed value; The fixed values ​​include: Fixed value = H*(2-0.8*H / H_max) Among them, H represents the set thickness of the strip steel; H_max represents the maximum thickness of the steel plate that the current unit can roll.

7. The method for controlling the step-down pressing of the winding roller according to claim 1, characterized in that: The step S2 includes: the auxiliary winding roller uses a constant pressure control method to wind the strip steel on the reel until the winding is completed.

8. The method for controlling the step-down pressing of the auxiliary winding roller according to claim 1, characterized in that: If the full-stroke pressure is not selected, the auxiliary winding roller will open after stepping n times. The opening process includes: first opening the distance of the strip thickness according to the valve opening of the step jump, and then opening according to the normal opening.

9. The method for controlling the step-down pressing of the winding roller according to claim 8, characterized in that: The valve opening is obtained through a PID regulator based on the position of the step and the pressure.

10. A reel, characterized in that: The winding is obtained by using the step-by-step pressing control method of the winding roller as described in any one of claims 1 to 9.

Images