A special roller press control method

Abstract

The present invention relates to the technical field of roller press control, and discloses a special roller press control method. Compared with the prior art in which the stroke of an electric cylinder is adjusted to make the radial gap between two working rollers meet the requirements, the special roller press control method provided by the present invention adjusts the swing angle of an inner arch to make the radial gap between the two working rollers meet the requirements, eliminates the transmission error between the electric cylinder and the inner arch, and when the detection accuracy of the angle detection unit is not lower than the detection accuracy of the detection structure of the electric cylinder itself, the adjustment accuracy of the radial gap between the two working rollers will be improved.

Description

Technical Field

[0001] The invention relates to the technical field of roller pressing control, and in particular to a special roller pressing machine control method. Background Art

[0002] The electric cylinder has a built-in detection structure for detecting the telescopic stroke of the electric cylinder. In the prior art, when a special roller press is used to process battery plates, the radial gap between the two working rollers of the special roller press is adjusted by: determining the target radial gap according to the plate size, calculating the target telescopic stroke of the electric cylinder connected to the working roller according to the target radial gap, controlling the telescopic stroke of the electric cylinder, and detecting the telescopic stroke of the electric cylinder in real time through the detection structure of the electric cylinder, so that the telescopic stroke of the electric cylinder reaches the target telescopic stroke.

[0003] With the development of battery technology, battery plates are gradually becoming thinner and lighter. In order to meet the requirements of battery plates for dimensional accuracy, the thinner the battery plates are, the higher the radial gap adjustment accuracy requirements of the roller press for processing the battery plates are, especially for the processing of ultra-thin plates, which requires higher radial gap adjustment accuracy.

[0004] When processing ultra-thin plates, if the radial clearance adjustment method mentioned above is used to adjust the radial clearance, due to the influence of processing errors, assembly errors and the limitation of low detection accuracy of the detection structure of the electric cylinder, the radial clearance between the two working rollers is difficult to meet the requirements of the ultra-thin plates for radial clearance adjustment accuracy, so that the size of the processed ultra-thin plates does not meet the requirements. Summary of the invention

[0005] The object of the present invention is to provide a special roller press control method, which can improve the radial clearance adjustment accuracy.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A control method for a special roller press, wherein the electric cylinder of the special roller press is provided with a detection structure for detecting the stroke of the electric cylinder; the special roller press also includes an angle detection unit for detecting the swing angle of the inner arch of the special roller press, and the detection accuracy of the angle detection unit is not lower than the detection accuracy of the detection structure;

[0008] The control method comprises the following steps:

[0009] Obtaining a target radial clearance, and calculating a final adjustment target swing angle of the inner arch of the special roller press according to the target radial clearance;

[0010] The movable end of the electric cylinder of the special roller press is controlled to extend and retract to adjust the radial gap between the two working rollers of the special roller press so that the difference between the final adjustment target swing angle and the actual swing angle of the inner arch is within the allowable error range of the final adjustment swing angle.

[0011] As an optional technical solution of the above-mentioned special roller press control method, before adjusting the radial gap between the two working rolls of the special roller press so that the difference between the final adjustment target swing angle and the actual swing angle of the inner arch is within the allowable error range of the final adjustment swing angle, it also includes:

[0012] Calculating the final adjustment target stroke of the electric cylinder according to the final adjustment target swing angle;

[0013] In the process of controlling the extension and retraction of the movable end of the electric cylinder of the special roller press, when the difference between the actual stroke of the electric cylinder and the final adjustment target stroke is within the allowable error range of the final adjustment stroke, it is determined whether the difference between the final adjustment target swing angle and the actual swing angle of the inner arch is within the allowable error range of the final adjustment swing angle;

[0014] If the difference between the final adjustment target swing angle and the actual swing angle of the inner arch is within the allowable error range of the final adjustment swing angle, the electric cylinder is controlled to stop moving.

[0015] As an optional technical solution for the above-mentioned special roller press control method, after the difference between the final adjustment target swing angle and the actual swing angle of the inner arch is within the allowable error range of the final adjustment swing angle, if both of the electric cylinders have stopped moving, the working roller is controlled to rotate.

[0016] As an optional technical solution of the above-mentioned special roller press control method, a downstream anti-warping structure is provided downstream of the working roller along the conveying direction of the sheet material;

[0017] During the rotation of the working rolls, when the rolled sheet material is conveyed to the bottom of the downstream anti-warping structure, the downstream anti-warping structure is controlled to press down the rolled sheet material.

[0018] As an optional technical solution of the above-mentioned special roller press control method, in the process of controlling the rotation of the working roll, the duration of the rotation of the working roll is calculated;

[0019] If the duration of the rotation of the working roll reaches the target rotation duration, the working roll is controlled to stop rotating.

[0020] As an optional technical solution of the above-mentioned special roller press control method, before obtaining the target radial clearance and calculating the final adjustment target swing angle of the inner arch of the special roller press according to the target radial clearance, it also includes:

[0021] Acquire a belt-added radial clearance, wherein the belt-added radial clearance is greater than the target radial clearance;

[0022] Calculate the preset target swing angle of the inner arch of the special roller press according to the radial clearance of the belt;

[0023] The electric cylinder is controlled to move so as to adjust the radial gap between the two working rolls so that the difference between the pre-adjusted target swing angle and the actual swing angle of the inner arch is within the allowable error range of the pre-adjusted swing angle.

[0024] As an optional technical solution of the above-mentioned special roller press control method, before adjusting the radial gap between the two working rolls so that the difference between the pre-adjusted target swing angle and the actual swing angle of the inner arch is within the allowable error range of the pre-adjusted swing angle, it also includes:

[0025] Calculating a preset target stroke of the electric cylinder according to the preset target swing angle;

[0026] In the process of controlling the extension and retraction of the movable end of the electric cylinder, when the difference between the actual stroke of the electric cylinder and the pre-adjusted target stroke is within the allowable error range of the pre-adjusted stroke, it is determined whether the difference between the final adjustment target swing angle and the actual swing angle of the inner arch is within the allowable error range of the pre-adjusted swing angle;

[0027] If the difference between the preset target swing angle and the actual swing angle of the inner arch is within the allowable error range of the preset swing angle, the electric cylinder is controlled to stop moving.

[0028] As an optional technical solution to the above-mentioned special roller press control method, after the difference between the pre-adjusted target swing angle and the actual swing angle of the inner arch is within the allowable error range of the pre-adjusted swing angle, if both electric cylinders have stopped moving, the sheet to be rolled will be sent to the radial gap between the two working rollers.

[0029] As an optional technical solution of the above-mentioned special roller press control method, an upstream anti-warping structure is provided upstream of the working roller along the conveying direction of the sheet material;

[0030] In the process of delivering the sheet material to be rolled into the radial gap between the two working rolls, when the sheet material to be rolled is delivered to just below the upstream anti-warping structure, the upstream anti-warping structure is controlled to press down the sheet material to be rolled.

[0031] As an optional technical solution of the above-mentioned special roller press control method,

[0032] As an optional technical solution of the above-mentioned special roller press control method, the belt radial gap C C =h t +t+e1 , where h t is the tooth height of the rolling die installed on the working roll, t is the sheet thickness before rolling, e is 1 To take into account the radial clearance allowance between the two working rolls when the sheet material is uneven before rolling;

[0033] And / or, the target radial gap is equal to the required sheet thickness after rolling.

[0034] Beneficial effects of the present invention: Compared with the prior art in which the radial gap between the two working rolls is made to meet the requirements by adjusting the stroke of the electric cylinder, the special roller press control method provided by the present invention adjusts the swing angle of the inner arch so that the radial gap between the two working rolls meets the requirements, thereby eliminating the transmission error between the electric cylinder and the inner arch. When the detection accuracy of the angle detection unit is not lower than the detection accuracy of the detection structure of the electric cylinder, the adjustment accuracy of the radial gap between the two working rolls will be improved, which can meet the requirements for radial gap adjustment accuracy during the processing of ultra-thin metal plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0036] Figure 1 It is a side schematic diagram of a special roller press when the working rolls provided by an embodiment of the present invention are in an initial position;

[0037] Figure 2 It is a main flow chart of the control method of the special roller press provided by the embodiment of the present invention;

[0038] Figure 3 It is a detailed flow chart of the control method of the special roller press provided by the embodiment of the present invention.

[0039] In the figure:

[0040] 1. Outer arch; 2. Inner arch; 3. Working roller; 4. Connecting rod; 5. Electric cylinder. DETAILED DESCRIPTION

[0041] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0042] like Figure 1 As shown, this embodiment provides a special roller press control method for roller forming a sheet material. This embodiment takes a special roller press for processing a plate of a fuel cell as an example. It should be noted that the special roller press control method provided in this embodiment can also be used to process other parts, which will not be specifically described here.

[0043] The special roller press comprises an outer arch 1 and two working rollers 3. The outer arch 1 is provided with a through hole extending in a first horizontal direction. The two working rollers 3 are both arranged in the through hole and arranged at intervals in a vertical direction. There is a radial gap extending in a second horizontal direction between the two working rollers 3 for passing the sheet material. The first horizontal direction is perpendicular to the second horizontal direction. One of the working rollers 3 is equipped with a driving structure, such as a motor gear structure. The two working rollers 3 are respectively recorded as an active working roller and a passive working roller. An input gear is fixedly installed at the output end of the motor, and an output gear is fixedly installed on the active working roller. The input gear and the output gear are meshed for transmission.

[0044] A rolling die is installed on at least one working roller 3. When the motor is working, the input gear and the output gear are engaged to drive the active working roller to rotate. During the rotation of the two working rollers 3, the rolling die will roll-form the sheet material, and make the sheet material after rolling pass through the radial gap, thereby realizing continuous roll-forming of the sheet material.

[0045] When a special roller press is used to process the plates of fuel cells, the thickness of the plates is different, and the requirements for the radial clearance between the two working rollers 3 are different. For this reason, the radial clearance between the two working rollers 3 is adjustable. Specifically, each working roller 3 is equipped with an electric cylinder 5, an inner arch 2 and a connecting rod 4. The mounting end of the electric cylinder 5 is hinged to the outer arch 1, and the two ends of the connecting rod 4 are respectively hinged to the movable end of the electric cylinder 5 and the inner arch 2. The working roller 3 is installed on the corresponding inner arch 2 through a bearing seat, so that the working roller 3 can rotate relative to the inner arch 2; the inner arch 2 is arranged in the through hole, and when the movable end of the electric cylinder 5 is extended and retracted, it can drive the inner arch 2 to swing back and forth along the inner wall of the through hole through the connecting rod 4 to adjust the radial clearance between the two working rollers 3.

[0046] In order to improve the adjustment accuracy of the radial gap between the two working rollers 3 and meet the requirements of the ultra-thin plate for the adjustment accuracy of the radial gap, the special roller press provided in this embodiment also includes an angle detection unit for detecting the swing angle of the inner arch 2, and each inner arch 2 is equipped with an angle detection unit. The electric cylinder 5 usually has its own detection structure, and the detection accuracy of the angle detection unit is required to be no less than the detection accuracy of the detection structure. Exemplarily, the angle detection unit is a grating ruler.

[0047] The radial clearance between the two working rolls 3 is calculated according to the swing angle of the inner arch 2. When the swing angle of the inner arch 2 meets the requirement, it is confirmed that the radial clearance between the two working rolls 3 meets the requirement. When adjusting the radial clearance between the two working rolls 3, the power transmission sequence is the electric cylinder 5, the connecting rod 4, the inner arch 2 and the working roll 3. Due to the influence of assembly error and processing error, when the detection accuracy of the angle detection unit is not lower than the detection accuracy of the detection structure of the electric cylinder 5, the adjustment accuracy of the radial clearance between the two working rolls 3 will be improved, which can meet the requirements for the radial clearance adjustment accuracy when processing ultra-thin metal plates.

[0048] Furthermore, in order to prevent the sheet material upstream and downstream of the radial gap from warping during the rolling process of the sheet material. In this embodiment, along the sheet material conveying direction, an upstream anti-warping structure is provided upstream of the working roller 3, and a downstream anti-warping structure is provided downstream of the working roller 3. When the sheet material passes through the upstream anti-warping structure, the upstream anti-warping structure is controlled to move to press the sheet material to be rolled; when the rolled sheet material passes through the downstream anti-warping structure, the downstream anti-warping structure is controlled to move to press the rolled sheet material, thereby ensuring that the sheet material upstream and downstream of the radial gap will not warp. Exemplarily, both the upstream anti-warping structure and the downstream anti-warping structure are cylinders.

[0049] Preferably, the upstream anti-warping structure is equipped with an upstream sheet material detection unit for detecting whether the sheet material is conveyed to the bottom of the upstream anti-warping structure. When it is confirmed that the sheet material is conveyed to the bottom of the upstream anti-warping structure, the upstream anti-warping structure is controlled to move to press the sheet material. The downstream anti-warping structure is equipped with a downstream sheet material detection unit for detecting whether the sheet material after rolling is conveyed to the bottom of the downstream anti-warping structure. When it is confirmed that the sheet material is conveyed to the bottom of the downstream anti-warping structure, the downstream anti-warping structure is controlled to move to press the sheet material after rolling. Exemplarily, the upstream sheet material detection unit and the downstream sheet material detection unit are both photoelectric switches.

[0050] In this embodiment, the upstream anti-warping structure includes an upstream middle anti-warping pressing unit and two upstream edge pressing units, wherein the upstream middle anti-warping pressing unit is used to press down the middle part of the sheet in the width direction, and the two upstream edge pressing units are used to press down the two edges in the width direction of the sheet. The upstream edge pressing unit is located downstream of the upstream middle anti-warping pressing unit.

[0051] When the anti-warping downward pressure provided by the upstream anti-warping structure and the downstream anti-warping structure is too large, it will affect the conveying of the sheet. When the anti-warping downward pressure provided by the upstream anti-warping structure and the downstream anti-warping structure is too small, the effect of pressing down the sheet will not be achieved. For this reason, the upstream anti-warping structure is equipped with an upstream pressure detection and adjustment unit for detecting and adjusting the anti-warping downward pressure provided by the upstream anti-warping structure; the downstream anti-warping structure is equipped with a downstream pressure detection and adjustment unit for detecting and adjusting the anti-warping downward pressure provided by the downstream anti-warping structure.

[0052] In this embodiment, the downstream anti-warping structure includes a downstream middle anti-warping pressing unit and two downstream edge pressing units, wherein the downstream middle anti-warping pressing unit is used to press down the middle part of the sheet in the width direction, and the two downstream edge pressing units are used to press down the two edges in the width direction of the sheet. The downstream edge pressing unit is located upstream of the downstream middle anti-warping pressing unit.

[0053] When both the upstream anti-warping structure and the downstream anti-warping structure are cylinders, the two groups of cylinders are respectively recorded as the upstream downward pressure cylinder and the downstream downward pressure cylinder. The upstream pressure detection and adjustment unit includes an upstream regulating valve and an upstream pressure sensor. The opening of the upstream regulating valve is adjustable. The air pump is connected to the rodless cavity of the upstream downward pressure cylinder through the upstream regulating valve. The rodless cavity pressure of the upstream downward pressure cylinder is adjusted by adjusting the opening of the upstream regulating valve, and the pressure in the rodless cavity of the upstream downward pressure cylinder is detected in real time through the upstream pressure sensor, so that the pressure in the rodless cavity of the upstream downward pressure cylinder meets the requirements. As for the value of the rodless cavity pressure of the upstream downward pressure cylinder that meets the requirements, it is related to factors such as the material and thickness of the sheet material. The rodless cavity pressure of the upstream downward pressure cylinder that meets the requirements corresponding to sheets of different materials and thicknesses can be determined through repeated tests.

[0054] The downstream pressure detection and adjustment unit includes a downstream regulating valve and a downstream pressure sensor. The opening of the downstream regulating valve is adjustable. The air pump is connected to the rodless chamber of the downstream downward pressure cylinder through the downstream regulating valve. The pressure of the rodless chamber of the downstream downward pressure cylinder is adjusted by adjusting the opening of the downstream regulating valve, and the pressure in the rodless chamber of the downstream downward pressure cylinder is detected in real time through the downstream pressure sensor, so that the pressure in the rodless chamber of the downstream downward pressure cylinder meets the requirements. As for the value of the rodless chamber pressure of the downstream downward pressure cylinder that meets the requirements, it is related to factors such as the material and thickness of the sheet material. The rodless chamber pressure of the downstream downward pressure cylinder that meets the requirements corresponding to sheets of different materials and thicknesses can be determined through repeated tests.

[0055] This embodiment also provides a special roller press control method, which uses the above-mentioned special roller press to improve the adjustment accuracy of the radial gap.

[0056] like Figure 2 As shown, the special roller press control method comprises the following steps:

[0057] Obtain a target radial clearance, and calculate a final adjustment target swing angle of the inner arch 2 of the special roller press according to the target radial clearance;

[0058] The movable end of the electric cylinder 5 of the special roller press is controlled to extend and retract to adjust the radial gap between the two working rollers 3 of the special roller press so that the difference between the final adjustment target swing angle and the actual swing angle of the inner arch 2 is within the allowable error range of the final adjustment swing angle.

[0059] Compared with the prior art in which the stroke of the electric cylinder 5 is adjusted to make the radial gap between the two working rollers 3 meet the requirements, the control method of the special roller press provided in this embodiment adjusts the swing angle of the inner arch 2 to make the radial gap between the two working rollers 3 meet the requirements, thereby eliminating the transmission error between the electric cylinder 5 and the inner arch 2. When the detection accuracy of the angle detection unit is not lower than the detection accuracy of the detection structure of the electric cylinder 5, the adjustment accuracy of the radial gap between the two working rollers 3 will be improved.

[0060] Figure 3 is a detailed flow chart of the special roller press control method provided in this embodiment. Figure 3 The control method of the above-mentioned special roller press is introduced in detail.

[0061] S10, resetting the electric cylinder 5 to zero position, adjusting the upstream regulating valve to make the rodless chamber air pressure of the upstream downward pressure cylinder zero, and adjusting the downstream regulating valve to make the rodless chamber air pressure of the downstream downward pressure cylinder zero.

[0062] Resetting the electric cylinder 5 to the zero position refers to controlling the electric cylinder 5 to drive the inner arch 2 to swing so that the inner arch 2 reaches the zero position switch position on the outer arch 1.

[0063] By executing step S10, it is ensured that the dedicated roller press is in the same initial state before rolling the sheet material each time, so as to simplify the control procedure and improve the adjustment accuracy.

[0064] S20, setting processing parameters.

[0065] The processing parameters include the thickness of the plate to be processed, t, and the tooth height h of the roller die used to process the plate. t , target radial clearance C W and the target rotation time of the working roll 3, etc. The dedicated roller press is provided with a control panel, on which a display box representing each processing parameter is displayed, and each processing parameter is manually input.

[0066] Target radial clearance C W The target radial clearance is related to the required thickness of the sheet material after rolling, and is as close as possible to the required thickness of the sheet material after rolling. Preferably, the target radial clearance is equal to the required thickness of the sheet material after rolling.

[0067] S30, calculating the belt radial clearance, the pre-adjustment target stroke, the pre-adjustment target swing angle, the final adjustment target swing angle and the final adjustment target stroke according to the processing parameters.

[0068] With radial clearance C C =h t +t+e 1 , e 1 In order to consider the uneven surface of the sheet before rolling, the work roll lifting allowance and the different processing accuracy of the sheet are different. 1 May be different, so that the sheet to be rolled can enter according to the radial clearance C of the belt C The adjusted radial clearance is within the range and the adjusted radial clearance is made as close as possible to the thickness of the sheet to be rolled.

[0069] The xy coordinate system is established with the center of the outer arch 1 as the origin. When the working roll 3 is in the initial position, the coordinate of the axis of the working roll 3 is (x 0 ,y 0 ), the angle between the line connecting the axis of the working roll 3 and the center of the outer arch 1 and the vertical direction is θ 0 In this embodiment, when the working roll 3 is in the initial position, the line connecting the axis of the working roll 3 and the center of the outer arch 1 forms an angle with the vertical direction.

[0070] The radial clearance of the working roll 3 is the radial clearance C with belt C When the coordinates of the axis of the working roll 3 are (x 1 ,y 1 ), the angle between the line connecting the axis of the working roll 3 and the center of the outer arch 1 and the vertical direction is θ 1 .in, y 1 =y 0 +C C / 2, r represents the rotation radius of the working roll 3 around the central axis of the outer arch 1,

[0071] The target swing angle is pre-adjusted to make the axis of the working roll 3 change from (x 0 ,y 0 )Move to (x 1 ,y 1 ) when the inner archway 2 swings. In this embodiment, the preset target swing angle is θ 1 .

[0072] The preset target stroke is to make the axis of the working roll 3 change from (x 0 ,y 0 )Move to (x 1 ,y 1 ), the stroke of the electric cylinder 5. In this embodiment, the preset target stroke is recorded as L1 , In the formula, R' represents the distance between the rotation axis of the movable end of the electric cylinder 5 and the connecting rod 4 rotating relative to each other and the central axis of the outer arch 1.

[0073] The radial clearance of the working roll 3 is the target radial clearance C W When the coordinates of the axis of the working roll 3 are (x 2 ,y 2 ), the angle between the line connecting the axis of the working roll 3 and the center of the outer arch 1 and the vertical direction is θ 2 ',in, y 2 =y 0 +C W / 2;

[0074] The final adjustment target swing angle is to make the axis of the working roll 3 change from (x 0 ,y 0 )Move to (x 2 ,y 2 ) when the inner archway 2 swings. In this embodiment, the final adjustment target swing angle is θ 2 ′.

[0075] The final adjustment target stroke is to make the axis of the working roll 3 change from (x 0 ,y 0 )Move to (x 2 ,y 2 ), the stroke of the electric cylinder 5. In this embodiment, the final adjustment target stroke is recorded as L' 2 ,

[0076] S40, control the action of the electric cylinder 5 to adjust the radial gap between the two working rolls 3, so that the difference between the actual stroke of the electric cylinder 5 and the pre-adjusted target stroke is within the allowable range of the pre-adjusted stroke, and the difference between the actual swing angle of the inner arch 2 and the pre-adjusted target swing angle is within the allowable range of the pre-adjusted swing angle.

[0077] In this embodiment, when adjusting the stroke of the electric cylinder 5, the target swing angle θ is preset. 1 And preset target travel L 1 The controller is sent to a dedicated roller press such as a PLC, and the controller adjusts the stroke of the electric cylinder 5 through closed-loop control. The stroke of the electric cylinder 5 is adjusted through closed-loop control, specifically including the following steps:

[0078] S41, pre-adjusting the target travel L according to the calculation 1 , control the electric cylinder 5 to drive the corresponding inner arch 2 to swing.

[0079] S42, using the detection structure of the electric cylinder 5 to measure the actual stroke L of the electric cylinder 5 t , and judge the actual stroke of the electric cylinder 5 and the preset target stroke L 1 Whether the difference is within the allowable error range of the preset stroke.

[0080] The allowable error range of the preset stroke is -e L1 ~e L1 ; When the comparison result is yes, that is, |L t -L 1 |≤e L1 , execute step S43. When the comparison result is no, that is, |L t -L 1 |>e L1 , the stroke amount of the electric cylinder 5 that needs to be adjusted is recorded as △L, △L=|L t -L 1 |, assign △L to L 1 , that is, L 1 =△L, then return to S41. 1 -L t >0, the moving direction of the piston rod of the electric cylinder 5 is the extension direction; if L 1 -L t <0, the moving direction of the piston rod of the electric cylinder 5 is the retraction direction.

[0081] S43, use the grating ruler to measure the actual swing angle θ of the inner arch t , determine whether the difference between the actual swing angle of the inner arch 2 and the pre-adjusted target swing angle is within the allowable error range of the pre-adjusted swing angle.

[0082] The allowable error range of the pre-adjusted swing angle is -e θ1 ~e θ1 ; When the comparison result is yes, that is, θ 1 -θ t |≤e θ1 , control the electric cylinder 5 to stop. When the comparison result is no, that is, θ 1 -θ t >e θ1 , the stroke amount that the electric cylinder 5 needs to adjust is △L, Assign △L to L 1 , that is, L 1 =△L, return to S41. θ 1 -θ t >0, the moving direction of the piston rod of the electric cylinder 5 is the extension direction; θ 1 -θ t When <0, the moving direction of the piston rod of the electric cylinder 5 is the retraction direction.

[0083] S50, when both electric cylinders 5 stop moving, control the feeding mechanism of the special roller press to move to convey the sheet material.

[0084] S60, when the sheet material is conveyed to the position directly below the upstream anti-warping structure, the upstream anti-warping structure is controlled to move to press down the sheet material.

[0085] S70. When the sheet material is conveyed into the radial gap between the two working rollers 3, the electric cylinder 5 is controlled to operate to adjust the radial gap between the two working rollers 3, so that the difference between the actual stroke of the electric cylinder 5 and the final adjustment target stroke is within the allowable range of the final adjustment stroke, and the difference between the actual swing angle of the inner arch 2 and the final adjustment target swing angle is within the allowable range of the final adjustment swing angle.

[0086] The required swing angle of the inner arch 2 is θ 2 =θ 2 ′-θ t ; The stroke that the electric cylinder 5 needs to adjust is

[0087] Specifically, the angle θ required for the inner arch 2 to swing 2 And the calculated stroke L of the electric cylinder 5 required to be adjusted 2 , is sent to the controller, and the controller adjusts the stroke of the electric cylinder 5 through closed-loop control. Adjusting the stroke of the electric cylinder 5 through closed-loop control specifically includes the following steps:

[0088] S71, according to the calculated stroke L that the electric cylinder 5 needs to adjust 2 , control the electric cylinder 5 to drive the corresponding inner arch 2 to swing.

[0089] S72, using the detection structure of the electric cylinder 5 to measure the actual stroke L of the electric cylinder 5 t , and judge whether the difference between the actual stroke of the electric cylinder 5 and the final adjustment target stroke is within the allowable error range of the final adjustment stroke.

[0090] The allowable error range of the final adjustment stroke is -e L2 ~e L2 ; When the comparison result is yes, that is, |L t -L 2 |≤e L2 , execute step S73. When the comparison result is no, that is, |L t -L 2 |>e L2 , the stroke amount of the electric cylinder 5 that needs to be adjusted is recorded as △L, △L=|L t -L 2 |, assign △L to L 2 , that is, L 2 =△L, then return to S71. 2 -Lt >0, the moving direction of the piston rod of the electric cylinder 5 is the extension direction; if L 2 -L t <0, the moving direction of the piston rod of the electric cylinder 5 is the retraction direction.

[0091] S73, using a grating ruler to measure the actual swing angle of the inner arch 2, and determine whether the difference between the actual swing angle of the inner arch 2 and the final adjustment target swing angle is within the allowable error range of the final adjustment swing angle.

[0092] The allowable error range of the pre-adjusted swing angle is -e θ2 ~e θ2 ; When the comparison result is yes, that is, |θ t -θ 2 |≤e θ2 , control the electric cylinder to stop. When the comparison result is no, that is, |θ t -θ 2 |>e θ2 , the stroke amount that the electric cylinder 5 needs to adjust is △L, Assign △L to L 2 , that is, L 2 =△L, return to S71. θ 2 -θ t >0, the moving direction of the piston rod of the electric cylinder 5 is the extension direction; θ 2 -θ t When <0, the moving direction of the piston rod of the electric cylinder 5 is the retraction direction.

[0093] S80, when both electric cylinders 5 stop moving, control the working roll 3 to rotate.

[0094] S90, when the sheet material is conveyed to the bottom of the downstream anti-warping structure, the downstream anti-warping structure is controlled to move to press the sheet material after being pressed by the roller.

[0095] S100, when the duration of the rotation of the working roll 3 reaches the target rotation duration, the working roll 3 is controlled to stop rotating.

[0096] S110, resetting the electric cylinder 5 to the zero position, and simultaneously relieving the pressure on the upstream downward pressure cylinder and the downstream downward pressure cylinder.

[0097] It should be noted that, in the present embodiment, when adjusting the radial clearance of the working roll 3, the control method of the two electric cylinders 5 is the same, and the two electric cylinders 5 are controlled at the same time, the extension and retraction directions of the two electric cylinders 5 are the same, the pre-adjustment target swing angles corresponding to different electric cylinders 5 are the same, the pre-adjustment target strokes corresponding to different electric cylinders 5 are the same, the final-adjustment target swing angles corresponding to different electric cylinders 5 are the same, and the final-adjustment target strokes corresponding to different electric cylinders 5 are the same, so as to simplify the conversion calculation between the stroke of the electric cylinder 5, the swing angle of the inner arch 2 and the radial clearance between the two working rolls 3.

[0098] The gap adjustment method provided in this embodiment first controls the action of the electric cylinder 5 according to the radial gap of the belt to adjust the radial gap between the two working rollers 3; then conveys the sheet material into the radial gap so that the actual radial gap is as close as possible to the thickness of the sheet material to be rolled; then controls the action of the electric cylinder 5 according to the target radial gap to adjust the radial gap between the two working rollers 3 so that the actual radial gap is as close as possible to the thickness of the sheet material after forming, thereby improving the adjustment accuracy of the radial gap, so that the thickness of the sheet material after rolling meets the requirements.

[0099] When controlling the action of the electric cylinder 5 in step S40 and step S70, the detection structure of the electric cylinder 5 is first used to cooperate with the control of the electric cylinder 5 so that the stroke of the electric cylinder 5 meets the requirements, and then the angle detection unit with a detection accuracy not lower than that of the detection structure of the electric cylinder 5 is used to cooperate with the control of the electric cylinder 5 so that the swing angle of the inner arch 2 meets the requirements, so as to achieve rough adjustment first and then fine adjustment, thereby improving the adjustment efficiency and adjustment accuracy. The control of the electric cylinder 5 in step S40 and step S70 is closed-loop control, which further improves the adjustment accuracy.

[0100] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

[0101] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0102] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A control method for a special roller press, wherein the electric cylinder (5) of the special roller press has a detection structure for detecting the stroke of the electric cylinder (5); characterized in that: The special roller press also includes an angle detection unit for detecting the swing angle of the inner archway (2) of the special roller press, wherein the detection accuracy of the angle detection unit is not lower than the detection accuracy of the detection structure; The control method comprises the following steps: Obtaining a target radial clearance, and calculating a final adjustment target swing angle of an inner arch (2) of a special roller press according to the target radial clearance; Controlling the extension and retraction of the movable end of the electric cylinder (5) of the special roller press to adjust the radial clearance between the two working rollers (3) of the special roller press so that the difference between the final adjustment target swing angle and the actual swing angle of the inner arch (2) is within the allowable error range of the final adjustment swing angle; Before obtaining the target radial clearance and calculating the final adjustment target swing angle of the inner arch (2) of the special roller press according to the target radial clearance, the method further includes: Acquire a belt-added radial clearance, wherein the belt-added radial clearance is greater than the target radial clearance; Calculate the pre-adjusted target swing angle of the inner arch (2) of the special roller press according to the radial clearance of the belt; Controlling the action of the electric cylinder (5) to adjust the radial gap between the two working rolls (3) so that the difference between the pre-adjusted target swing angle and the actual swing angle of the inner arch (2) is within the allowable error range of the pre-adjusted swing angle; The added radial clearance C C =h t +t+e1, where h t is the tooth height of the rolling die installed on the working roll (3), t is the thickness of the sheet before rolling, and e1 is the radial clearance margin between the two working rolls (3) when considering the unevenness of the sheet before rolling; The target radial clearance is equal to the required thickness of the sheet material after rolling.

2. The dedicated roller press control method according to claim 1, characterized in that: Before adjusting the radial gap between the two working rolls (3) of the special roller press so that the difference between the final adjustment target swing angle and the actual swing angle of the inner arch (2) is within the allowable error range of the final adjustment swing angle, the method further comprises: Calculating a final adjustment target stroke of the electric cylinder (5) according to the final adjustment target swing angle; In the process of controlling the extension and retraction of the movable end of the electric cylinder (5) of the special roller press, when the difference between the actual stroke of the electric cylinder (5) and the final adjustment target stroke is within the allowable error range of the final adjustment stroke, judging whether the difference between the final adjustment target swing angle and the actual swing angle of the inner archway (2) is within the allowable error range of the final adjustment swing angle; If the difference between the final adjustment target swing angle and the actual swing angle of the inner arch (2) is within the allowable error range of the final adjustment swing angle, the electric cylinder (5) is controlled to stop moving.

3. The dedicated roller press control method according to claim 2, characterized in that: After the difference between the final adjustment target swing angle and the actual swing angle of the inner arch (2) is within the allowable error range of the final adjustment swing angle, if both of the electric cylinders (5) have stopped moving, the working roll (3) is controlled to rotate.

4. The dedicated roller press control method according to claim 3, characterized in that: Along the conveying direction of the sheet material, a downstream anti-warping structure is provided downstream of the working roller (3); During the rotation of the working roller (3), when the sheet material after rolling is transported to the bottom of the downstream anti-warping structure, the downstream anti-warping structure is controlled to press down the sheet material after rolling.

5. The dedicated roller press control method according to claim 4, characterized in that: In the process of controlling the rotation of the working roll (3), calculating the duration of the rotation of the working roll (3); If the duration of rotation of the working roll (3) reaches the target rotation duration, the working roll (3) is controlled to stop rotating.

6. The dedicated roller press control method according to claim 1, characterized in that: Before adjusting the radial gap between the two working rolls (3) so that the difference between the pre-adjusted target swing angle and the actual swing angle of the inner arch (2) is within the allowable error range of the pre-adjusted swing angle, the method further comprises: Calculating a preset target stroke of the electric cylinder (5) according to the preset target swing angle; In the process of controlling the extension and retraction of the movable end of the electric cylinder (5), when the difference between the actual stroke of the electric cylinder (5) and the pre-adjusted target stroke is within the allowable error range of the pre-adjusted stroke, judging whether the difference between the final adjustment target swing angle and the actual swing angle of the inner archway (2) is within the allowable error range of the pre-adjusted swing angle; If the difference between the preset target swing angle and the actual swing angle of the inner arch (2) is within the allowable error range of the preset swing angle, the electric cylinder (5) is controlled to stop moving.

7. The dedicated roller press control method according to claim 6, characterized in that: After the difference between the pre-adjusted target swing angle and the actual swing angle of the inner arch (2) is within the allowable error range of the pre-adjusted swing angle, if both electric cylinders (5) have stopped moving, the sheet material to be rolled is sent to the radial gap between the two working rollers (3).

8. The dedicated roller press control method according to claim 7, characterized in that: Along the conveying direction of the sheet material, an upstream anti-warping structure is provided upstream of the working roller (3); In the process of delivering the sheet material to be rolled into the radial gap between the two working rollers (3), when the sheet material to be rolled is delivered to just below the upstream anti-warping structure, the upstream anti-warping structure is controlled to press down the sheet material to be rolled.

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