CN114054554B

CN114054554B - Auxiliary system of roll bending forming equipment capable of automatically adjusting roll gap

Info

Publication number: CN114054554B
Application number: CN202111393930.4A
Authority: CN
Inventors: 韩飞; 顾斌
Original assignee: North China University of Technology
Current assignee: North China University of Technology
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2023-05-23
Anticipated expiration: 2041-11-23
Also published as: CN114054554A

Abstract

The invention discloses a roll bending forming equipment auxiliary system capable of automatically adjusting a roll gap, wherein the roll bending equipment comprises a guide frame, a first pass, a second pass and a subsequent pass which are sequentially arranged, the first pass is a flat roll pass, the second pass and the subsequent pass are forming passes, and each pass respectively comprises a gland, an adjusting screw fixing screw, an adjusting nut, an upper bearing box, a housing, an upper roll shaft and an upper roll; plate thickness detection devices are respectively arranged between the adjusting screws of the two archways and the upper bearing box of the flat roller pass; a roll gap self-adaptive adjusting device is respectively arranged between the adjusting screws of the two housing archways and the upper bearing box of the forming pass; the roll gap size can be automatically and accurately adjusted according to different plate thicknesses, the forming force required by forming the plate with the thickness is achieved, manual intervention is not required in the working process, and the forming quality of the plate is ensured to be good; the structure and the functions of the traditional roll bending equipment are not damaged when the traditional roll bending equipment is disassembled and assembled; and has emergency adjustment capability in the event of failure.

Description

Auxiliary system of roll bending forming equipment capable of automatically adjusting roll gap

Technical Field

The invention relates to roll bending forming equipment in the field of metal plastic processing, in particular to an auxiliary system of roll bending forming equipment capable of automatically adjusting roll gaps.

Background

Roll bending belongs to a plastic forming process, and a roll bending forming machine with multiple passes arranged in sequence is generally adopted to bend and deform a metal strip by passing through a roller in each pass, so that a product with a specified cross-sectional shape is produced.

In recent years, roll bending forming products are increasingly widely applied due to good surface quality and comprehensive performance, with the continuous maturation of roll bending forming technology, profile steel products are also developing towards high strength, high precision and more complex sections, roll bending forming equipment used by a plurality of large enterprises is also increasingly automated, so that the roll bending forming equipment has faster production technology and great advantages in facing market competition. However, most roll bending manufacturers in China have prominent problems in producing steel plates with certain precision and thickness at present, namely the flexibility of equipment in production is not high enough. Because the roll bending equipment is required to form plates with different thicknesses during working, the roll gap between the upper roll and the lower roll of each pass of the roll bending forming machine is frequently adjusted to be proper in size so as to adapt to different plate thicknesses. The mill roll bending equipment is basically provided with a housing type and guide columns from the appearance, the housing type mill roll bending equipment is characterized in that a bearing box slides between the inner walls of the housing to adjust the mill roll gap, and the guide column type mill roll bending equipment is characterized in that the bearing box is sleeved on two guide columns to slide to adjust the mill roll gap, and the mill roll bending equipment in any form has the requirement of mill roll gap adjustment.

At present, the traditional adjustment mode of the roll gap of roll bending forming equipment is to rotate a nut on a pressing cover by using a spanner, and enable an adjusting screw to move up and down in the vertical direction through screw pair transmission so as to change the position of an upper shaft, the position of a lower shaft is unchanged, thereby changing the size of the roll gap, and then a clearance gauge is used for checking the roll gap. The conventional method has obvious defects that the number of passes on a complete roll bending production line is relatively large, and the roll gap is required to be adjusted for 2n times for n times. Therefore, the manual adjustment mode has low efficiency, affects the production speed and the product precision, and increases the superposition error along with the accumulation of adjustment errors of each pass, so that the quality of the plate coming out of the last pass is inconsistent with the product requirement. The manual adjustment mode has the advantages that although the mark can be marked by the memorial archway scale and the gauge can be used for checking, the manual adjustment mode has human errors after all, and the adjustment work of operators in the actual factory environment has obvious randomness, so that the accuracy of the roll gap is difficult to ensure. The traditional mode seriously reduces the production speed of products, influences the profit of enterprises and also causes the waste of resources.

In order to solve the problems, the production speed is increased, and an effective control method, namely an adaptive control technology, is generated. The self-adaptive control technology enables the production process of the product to be more automatic and intelligent, and the control system with the technology can automatically adjust the size of the roll gap according to different production requirements. To achieve faster production speeds, enterprises must have a roll forming apparatus that can flexibly adjust the roll gap, which makes the application and development of adaptive techniques conditional and valuable. Up to now, a considerable amount of prior art has proposed different devices or methods for adaptive adjustment of the roll gap to replace the traditional manual adjustment. In the prior art, the methods adopted for solving the problems are mainly divided into the following three types:

The first type directly uses a motor and a cylinder. For example, a rolling mill roll gap adjusting device and a rolling mill disclosed in Chinese patent publication No. CN211437476U, wherein two side archways are respectively driven by a servo electric cylinder to ascend and descend; for example, a roll gap adjusting device and a roll gap adjusting method disclosed in Chinese patent publication No. CN108787759A, wherein two side archways are combined with one motor; for example, a roll gap adjuster of a roll press disclosed in chinese patent publication No. CN 207669941U and a roll gap adjusting mechanism disclosed in chinese patent publication No. CN202461124U employ both a cylinder and a motor.

The disadvantage of this type of solution is that one to two motors are used per pass, the roll bending device itself is subjected to a large forming force generated by the sheet material during operation to generate deflection, so that the roll gap adjusting effect is not necessarily in accordance with theoretical assumption, and in addition, the performance of the motors is directly related to the size of the roll gap, so that the requirements on the motors are high, and the cost is high. Or an air pressure scheme is used, the arrangement of the pipeline and the air compressor leads to complex structure, high cost and difficult popularization in practical application.

Second, some small rigid structures are utilized. For example, a roll gap adjusting mechanism disclosed in chinese patent publication No. CN102671954a uses an eccentric structure; for example, a regulating device and a roll gap regulating method disclosed in chinese patent publication No. CN110328242a, using wedges; for example, a cold roll forming machine disclosed in chinese patent publication No. CN208555569U uses racks.

The disadvantage of such solutions is that with these small rigid structures it is unavoidable to modify the conventional roll bending apparatus, such as to install racks, or to leave installation space for wedges, or to reinstall eccentric structures, which are relatively extensive.

Third, flexible elements such as springs are utilized. For example, a self-adaptive upper shaft adjusting device of a cold roll forming machine disclosed in Chinese patent publication No. CN110052513B utilizes disc springs with different combinations.

The disadvantage of this type of solution is that the usual springs and spring arrangements are often of constant and varying stiffness, which means that once the type or combination of the springs and spring arrangements is established, the characteristic curve of the springs and spring arrangements is fixed and cannot be changed, i.e. the spring with non-adjustable stiffness is used, and the above-mentioned patent uses a spring with non-adjustable stiffness, which is difficult to adapt to the forming forces required for varying thickness plates unless a combination of disc springs is replaced constantly, or that several sets of data points of plate thickness and forming forces fall exactly on the characteristic curve of the selected spring arrangement. Therefore, if the roll gap self-adaptation problem is solved by using the spring device with fixed rigidity and variable rigidity, the roll gap self-adaptation is realized only by the flexible surface of the spring, but the deeper forming force self-adaptation is not realized, so that the forming force applied to the plate is often smaller or larger, the plate is incompletely formed due to smaller forming force, and the rebound phenomenon occurs, and even the plate after going out from the pass can strike the next pass roller and the like; if the thickness is larger, the plate is crushed, redundant plastic deformation and even cracking occur.

In view of this, the present invention has been made.

Disclosure of Invention

The invention aims to provide an auxiliary system of roll bending forming equipment capable of automatically adjusting roll gaps, so as to solve the technical problems in the prior art.

The invention aims at realizing the following technical scheme:

the auxiliary system for the roll bending forming equipment capable of automatically adjusting the roll gap comprises a guide frame 100, a first pass, a second pass and a subsequent pass which are sequentially arranged, wherein the first pass is a flat roll pass, the second pass and the subsequent pass are forming passes, and the first pass, the second pass and the subsequent pass comprise a gland 200, an adjusting screw 300, an adjusting screw fixing screw 400, an adjusting nut 500, an upper bearing box 600, a housing 700, an upper roll shaft 800 and an upper roll 900;

plate thickness detection devices 1 are respectively arranged between the adjusting screws 300 of the two archways of the flat roller pass and the upper bearing box 600;

a roll gap self-adaptive adjusting device 2 is respectively arranged between the adjusting screws 300 of the two housing archways and the upper bearing box 600 of the forming pass;

a set of control systems 3 is also included.

Compared with the prior art, the auxiliary system of the roll bending forming equipment capable of automatically adjusting the roll gap can automatically and accurately adjust the roll gap according to different plate thicknesses and achieve the forming force required by forming the plate with the thickness, manual intervention is not needed in the working process, and the forming quality of the plate is ensured to be good; the structure and the functions of the traditional roll bending equipment are not damaged when the traditional roll bending equipment is disassembled and assembled; and has emergency adjustment capability in the event of failure.

Drawings

FIG. 1 is a schematic view of a conventional roll bending apparatus production line spool without the present system installed;

FIG. 2 is a schematic diagram of a conventional flat roll pass architecture without the present system installed;

FIG. 3 is a schematic diagram of a conventional forming pass configuration without the present system installed;

FIG. 4 is an isometric view of a mechanical portion of a roll bending apparatus auxiliary system for automatically adjusting roll gap provided by an embodiment of the present invention after the mechanical portion is installed in the roll bending apparatus;

FIG. 5 is a schematic view of a flat roll pass equipped with a plate thickness detection device according to an embodiment of the present invention;

FIG. 6 is a schematic view of a forming pass with an adaptive roll gap adjustment device according to an embodiment of the present invention;

FIG. 7a is a front view of a flat roll pass before installation of a plate thickness detection device;

FIG. 7b is a front view of a flat roll pass after installation of the plate thickness detection device;

FIG. 8 is an isometric view of a plate thickness detection device;

FIG. 9a is an elevation view of a forming pass prior to installation of a roll gap adaptive adjustment apparatus;

FIG. 9b is an elevation view of a forming pass without a pressure sensor added after installation of the roll gap adaptive adjustment apparatus;

FIG. 9c is a front view of a forming pass with a pressure sensor added after the roll gap adaptive adjustment apparatus is installed;

FIG. 10 is a full cross-sectional view of a roll gap adaptive adjustment device without the addition of a pressure sensor;

FIG. 11 is an isometric view of a roll gap adaptive adjustment device without the addition of a pressure sensor;

FIG. 12 is a full cross-sectional view of a roll gap adaptive adjustment device incorporating a pressure sensor;

FIG. 13 is an isometric view of a roll gap adaptive adjustment device incorporating a pressure sensor;

FIG. 14 is a graph showing the variation of electromagnetic force with axial displacement of a mover in one cycle;

FIG. 15 is a graph showing the variation of electromagnetic force at different currents in 1/4 cycle;

FIG. 16 is a graph showing the combined characteristics of two parallel coil springs;

FIG. 17 is a graph showing a comparison of a combined characteristic curve of two parallel coil springs with a forming force-plate thickness relationship curve;

FIG. 18 is a graph showing characteristics of the overall roll gap adaptive adjustment apparatus;

FIG. 19 is a schematic diagram of the operation of the roll gap adaptive adjustment apparatus;

FIG. 20a is a schematic view of a roll gap adaptive adjustment device prior to locking;

FIG. 20b is a schematic view of the roll gap adaptive adjustment apparatus after locking;

fig. 21 is a schematic diagram of a control system configuration.

In the figure:

the plate thickness detection device 1 includes:

top plate 101, long screw 102, base 103, press block 104, displacement sensor 105, press block fixing screw 106, base fixing screw 107;

the roll gap self-adaptive adjusting device 2 comprises:

the device comprises a shell 201, a scale thread column 202, an upper pressure plate 203, an upper thrust bearing 204, a lower pressure plate 205, a lower thrust bearing 206, an outer spring 207, an inner spring 208, an electromagnetic spring stator 209, an electromagnetic spring rotor 210, an electromagnetic spring coil 211, a limit long screw 212, a limit sleeve 213, a lock nut 214, a chassis 215, a chassis fixing screw 216, an elongated screw fixing screw 217, a pressure sensor 218 and a pressure sensor fixing screw 219;

The control system 3 includes:

the system comprises a controller 301, an adjustable power supply 302, a computer end 303 and a pressure sensor signal acquisition module 304;

the conventional roll bending apparatus includes:

the device comprises an introduction frame 100, a gland 200, an adjusting screw 300, an adjusting screw fixing screw 400, an adjusting nut 500, an upper bearing box 600, a housing 700, an upper roll shaft 800 and an upper roll 900.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it will be apparent that the described embodiments are only some embodiments of the invention, but not all embodiments, which do not constitute limitations of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

The terms that may be used herein will first be described as follows:

the term "and/or" is intended to mean that either or both may be implemented, e.g., X and/or Y are intended to include both the cases of "X" or "Y" and the cases of "X and Y".

The terms "comprises," "comprising," "includes," "including," "has," "having" or other similar referents are to be construed to cover a non-exclusive inclusion. For example: including a particular feature (e.g., a starting material, component, ingredient, carrier, formulation, material, dimension, part, means, mechanism, apparatus, step, procedure, method, reaction condition, processing condition, parameter, algorithm, signal, data, product or article of manufacture, etc.), should be construed as including not only a particular feature but also other features known in the art that are not explicitly recited.

The term "consisting of … …" is meant to exclude any technical feature element not explicitly listed. If such term is used in a claim, the term will cause the claim to be closed, such that it does not include technical features other than those specifically listed, except for conventional impurities associated therewith. If the term is intended to appear in only a clause of a claim, it is intended to limit only the elements explicitly recited in that clause, and the elements recited in other clauses are not excluded from the overall claim.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and the like should be construed broadly to include, for example: the connecting device can be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms herein above will be understood by those of ordinary skill in the art as the case may be.

The terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. refer to an orientation or positional relationship based on that shown in the drawings, merely for ease of description and to simplify the description, and do not explicitly or implicitly indicate that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present disclosure.

What is not described in detail in the embodiments of the present invention belongs to the prior art known to those skilled in the art. The specific conditions are not noted in the examples of the present invention and are carried out according to the conditions conventional in the art or suggested by the manufacturer. The reagents or apparatus used in the examples of the present invention were conventional products commercially available without the manufacturer's knowledge.

The invention relates to a roll bending forming equipment auxiliary system capable of automatically adjusting roll gaps, which comprises a guide frame 100, a first pass, a second pass and a subsequent pass which are sequentially arranged, wherein the first pass is a flat roll pass, the second pass and the subsequent pass are forming passes, and the first pass, the second pass and the subsequent pass respectively comprise a gland 200, an adjusting screw 300, an adjusting screw fixing screw 400, an adjusting nut 500, an upper bearing box 600, a housing 700, an upper roll shaft 800 and an upper roll 900, and the roll bending forming equipment auxiliary system is characterized in that:

A set of control systems 3 is also included.

The plate thickness detection device 1 includes: top plate 101, long screw 102, base 103, press block 104, displacement sensor 105, press block fixing screw 106, and base fixing screw 107;

the top plate 101 is a strip-shaped plate, the middle is provided with two threaded through holes, and the outer side is provided with two light holes;

two threaded through holes are formed in the outer side of the base 103, two stepped through holes are formed in the middle of the base, a boss is arranged in the center of the base, and a semicircular column groove is formed in the vertical direction of the boss;

the adjusting screw 300 is connected with two threaded through holes in the middle of the top plate 101 through an adjusting screw fixing screw 400, the long screw 102 penetrates through two light holes in the outer side of the top plate 101 to be connected with the threaded through holes in the outer side of the base 103, and the base fixing screw 107 penetrates through two stepped through holes in the middle of the base 103 to fix the base 103 on the upper surface of the upper bearing box 600;

a semicircular column groove is formed in the middle of the pressing block 104 in the vertical direction, is matched with the semicircular column groove in the boss vertical direction of the base 103, and is connected with and clamps the displacement sensor 105 through the pressing block fixing screw 106.

The roll gap self-adaptive adjusting device 2 comprises a shell 201, a scale thread column 202, an upper pressure plate 203, an upper thrust bearing 204, a lower pressure plate 205, a lower thrust bearing 206, an outer spring 207, an inner spring 208, an electromagnetic spring stator 209, an electromagnetic spring rotor 210, an electromagnetic spring coil 211, a limit long screw 212, a limit sleeve 213, a lock nut 214, a chassis 215 and a chassis fixing screw 216;

The shell 201 is of a double-layer structure, the two layers are connected through four rib plates, the upper layer is provided with 2 threaded through holes, 4 reserved stepped threaded through holes for installing the pressure sensor fixing screws 219 and one threaded blind hole on the lower surface, the lower layer is of an annular structure, the lower layer is uniformly provided with 4 through holes at intervals of 90 degrees, and the inner side of the annular structure is provided with internal threads;

when the pressure sensor 218 is not installed, the upper layer of 2 threaded through holes are connected with the adjusting screw 300 through the adjusting screw fixing screw 400; when the pressure sensor 218 is additionally arranged, the 2 threaded through holes on the upper layer are connected with the adjusting screw 300 through the lengthened screw fixing screw 217;

the scale thread column 202 is a stepped thread column, the thread at the smaller diameter end is completely screwed into the thread blind hole at the lower surface of the upper layer of the shell 201, scales are arranged on the side surface of the part with the larger diameter, and a circular boss is arranged at the tail end of the thread;

the upper pressure plate 203 is fixed on the outer side of the scale thread column 202 through threaded connection, a stepped groove is formed in the lower surface of the upper pressure plate 203, and the upper thrust bearing 204 is embedded in the stepped groove;

the lower pressure plate 205 is fixed on the outer side of the scale thread column 202 through threaded connection and is positioned below the upper pressure plate 203, a stepped groove is formed in the lower surface of the lower pressure plate 205, and the lower thrust bearing 206 is embedded in the stepped groove;

The middle part of the upper surface of the chassis 215 is provided with two annular grooves, two stepped through holes are outwards arranged in the annular grooves, an annular groove with internal threads is outwards arranged on the inner wall of the annular groove, four uniformly distributed threaded blind holes are formed in the outermost side of the annular groove, and the chassis fixing screw 216 penetrates through the two stepped through holes to fix the chassis 215 on the upper surface of the upper bearing box 600;

the electromagnetic spring stator 209 is in a cylindrical structure, the inner wall is provided with annular teeth, the wall is provided with a wire outlet hole, one end of the electromagnetic spring stator is provided with external threads, and the external thread end is connected with the internal threads on the lower layer of the shell 201;

the electromagnetic spring rotor 210 is a columnar structure with a through hole in the core, an annular groove and annular teeth corresponding to the annular teeth on the inner wall of the stator are arranged on the outer wall, a step is arranged at one end of the electromagnetic spring rotor, an external thread is arranged at the step, and the external thread is connected with the annular groove with the internal thread of the chassis 215;

the electromagnetic spring coils 211 are regularly wound in annular grooves on the outer wall of the electromagnetic spring rotor 210, and two ends of each coil penetrate out of wire outlet holes on the wall of the electromagnetic spring stator 209 to be connected with a power supply;

the outer spring 207 and the inner spring 208 are sleeved together and pass through the core through hole of the electromagnetic spring rotor 210, the outer spring 207 is positioned between the upper pressure plate 203 and the chassis 215, the inner spring 208 is positioned between the lower pressure plate 205 and the chassis 215, the upper end and the lower end of the outer spring 207 and the lower end of the inner spring 208 are both planes, and the lower end is clamped in an annular groove of the chassis 215;

The limit long screw 212 comprises a polish rod part and a threaded part, the limit long screw 212 penetrates through a through hole at the lower layer of the shell 201 and then is screwed into a threaded blind hole of the chassis 215, the outer diameter of the polish rod part is smaller than the aperture of the through hole, the limit sleeve 213 is sleeved on the limit long screw 212, and the lock nut 214 is screwed on an external thread of the limit long screw 212 to support the limit sleeve 213.

4 threaded blind holes are uniformly arranged at intervals of 90 degrees at the bottom of the pressure sensor 218, and are fixed in reserved stepped threaded through holes in the upper layer of the shell 201 through pressure sensor fixing screws 219, and a measuring pressure head at the top of the pressure sensor 218 abuts against the bottom surface of the adjusting screw 300.

The control system 3 comprises a controller 301, an adjustable power supply 302, a computer end 303 and a pressure sensor signal acquisition module 304.

The controller 301 is connected to the displacement sensor 105 and the pressure sensor 218, respectively;

the pressure sensor signal acquisition module 304 acquires the original signal of the pressure sensor 218, processes and converts the original signal and transmits the original signal to the computer end 303;

the computer end 303 is provided with a special driving unit matched with the controller, the driving unit is provided with a monitoring window for acquiring numerical values by the displacement sensor 105, and the computer end 303 is also provided with monitoring software matched with the pressure sensor 218;

The number of the adjustable power supplies 302 is equal to the number of forming passes, that is, two roll gap adaptive adjustment devices 2 in the same forming pass share one adjustable power supply 302.

In summary, the device or the system with the ability of automatically adjusting the roll gap of the roll bending equipment can automatically and accurately adjust the roll gap according to different plate thicknesses and achieve the forming force required by forming the plate with the thickness, the working process does not need manual intervention, and the forming quality of the plate is ensured to be good; the structure and the functions of the traditional roll bending equipment are not damaged when the traditional roll bending equipment is disassembled and assembled; the device or system has emergency adjustment capability in the event of failure.

In order to more clearly demonstrate the technical scheme and the technical effects provided by the invention, the following detailed description of the embodiments of the invention is given by way of specific examples.

Example 1

1. The whole mechanical structure of the system is introduced:

the conventional roll bending apparatus not equipped with the system is shown in fig. 1, taking a six-pass apparatus as an example, an uncoiler is arranged in front of a roll bending apparatus pedestal, a coil on the uncoiler passes through a guide frame 100 after being pulled out of an end, and the guide frame has a plate guiding function and feeds a plate into a first pass. The first pass of the roll bending equipment is a flat roll pass, and the second and subsequent passes are forming passes. The first pass serves to level the sheet and ensure that the sheet has sufficient forward drive to be engaged by the second pass forming pass, thereby performing a pass-by-pass forming.

The schematic diagram of the first-pass flat-roll pass structure without the system is shown in fig. 2, and the schematic diagram of the second pass and the subsequent forming pass structure without the system is shown in fig. 3, and the second pass is taken as an example. The traditional roll bending pass structure mainly comprises key components such as a gland 200, an adjusting screw 300, an adjusting screw fixing screw 400, an adjusting nut 500, an upper bearing box 600, a housing 700, an upper roll shaft 800, an upper roll 900 and the like.

The plate thickness self-adaptive roll bending forming auxiliary system comprises three main parts, namely a plate thickness detection device 1, a roll gap self-adaptive adjustment device 2 and a control system 3. In the roll bending equipment production line provided with the system, 2 plate thickness detection devices are used, the plate thickness detection devices are arranged between an adjusting screw 300 and an upper bearing box 600 in a housing 700 of a first pass, namely a flat roll pass, and one housing 700 is arranged at each side; the roll gap self-adaptive adjusting device uses 2n roll gap self-adaptive adjusting devices, and is arranged between the adjusting screw 300 and the upper bearing box 600 in the two side housing archways 700 of the forming pass, wherein n refers to the number of forming passes after the flat roll pass. Taking a six-pass roll bending forming apparatus as an example, the first pass is a flat roll pass, and the second five passes are forming passes, so 2 plate thickness detection devices 1, 10 roll gap self-

adaptive adjustment devices

2 and 1 set of control system 3 are used in total.

The schematic diagram of the whole auxiliary system installed on the roll bending equipment production line is shown in fig. 4, the schematic diagram of the flat roll pass with the plate thickness detection device 1 is shown in fig. 5, and the schematic diagram of the forming pass with the roll gap self-adaptive adjustment device 2 is shown in fig. 6.

2. Structure introduction of plate thickness detection device

The plate thickness detection device 1 is a pilot device of the whole auxiliary system, the detected plate thickness signal needs to be quickly transmitted to the control system 3, the control system 3 judges that a certain amount of current is supplied to the roll gap self-adaptive adjustment device 2 in each pass according to the plate thickness signal, and the plate thickness detection device 1 is an important basis for the operation of the rear roll gap self-adaptive adjustment device 2. The plate thickness detection device 1 is mounted before and after the flat roll pass, as shown in fig. 7a and 7b, for example.

The plate thickness detection device 1 specifically includes: top plate 101, long screw 102, base 103, press block 104, displacement sensor 105, press block fixing screw 106, and base fixing screw 107. An axial view of the plate thickness detecting device 1 is shown in fig. 8, and a specific structure thereof will be described below.

Introduction of specific parts:

top plate 101: the roof is rectangular shaped plate, has two screw thread through-holes in the centre, and the outside has two unthreaded holes. The adjusting screw 300 of the roll bending device is connected with the top plate 101 through an adjusting screw fixing screw 400, and the adjusting screw fixing screw 400 is in threaded connection with two threaded through holes in the middle of the top plate 101. The long screw 102 passes through two light holes on the outer side of the top plate 101 and is in threaded connection with the base 103, the aperture of the light holes is larger than the diameter of the polish rod part of the long screw 102, and the polish rod part of the long screw 102 can axially slide in the light holes of the top plate 101.

Long screw 102: the end of the long screw 102 has a threaded section for screwing into a threaded through hole of the base 103. The diameter of the polish rod section of the long screw 102 is smaller than the aperture of the polish hole of the top plate 101, and can move axially therein.

Base 103: two threaded through holes are formed on the outer side of the base 103 for screwing the long screws 102. There are two stepped through holes in the middle for screwing in the base fixing screw 107 to connect the base 103 with the upper bearing housing 600. The center is provided with a boss, and a semicircular column groove is arranged in the vertical direction of the boss and is used for clamping the displacement sensor 105 together by being matched with the pressing block 104.

Briquetting 104: a semi-cylindrical groove is arranged in the middle vertical direction and is used for being matched with a boss of the base 103 to clamp the displacement sensor 105 together. There are two stepped through holes for passing through the press block fixing screw 106.

Displacement sensor 105: the spring at the measuring head of the displacement sensor 105 enables the displacement sensor 105 to have a reset function after being pressed, is used for detecting axial displacement and can output a displacement electric signal. The displacement sensor 105 has an amplifier integrated therein, and is part of the displacement sensor 105.

Briquetting set screw 106: for threading into the threaded hole of the boss of the base 103 after passing through the stepped through-hole of the press block 104, thereby fixing the press block 104 to the boss of the base 103.

Base set screw 107: for securing the base 103 to the upper surface of the upper bearing cartridge 600.

3. The structure of the adaptive device is described as follows:

the roll gap self-adaptive adjusting device 2 is the most important component part in the auxiliary system and is a key structure for realizing the thickness self-adaptive forming function. The portion may choose whether to add the pressure sensor 218 according to actual needs. The roll gap adaptive adjustment apparatus 2 is shown in fig. 9b and 9c with or without the pressure sensor 218 attached before and after the forming pass, as shown in fig. 9a and 9 b.

The specific structure of the roll gap adaptive adjustment device 2 in the state of not adding the pressure sensor 218 includes: the device comprises a shell 201, a scale thread column 202, an upper pressure plate 203, an upper thrust bearing 204, a lower pressure plate 205, a lower thrust bearing 206, an outer spring 207, an inner spring 208, an electromagnetic spring stator 209, an electromagnetic spring rotor 210, an electromagnetic spring coil 211, a limit long screw 212, a limit sleeve 213, a lock nut 214, a chassis 215 and a chassis fixing screw 216. The roll gap adaptive adjustment apparatus 2 is shown in fig. 10 in a full sectional view, and the roll gap adaptive adjustment apparatus 2 is shown in fig. 11 in an isometric view, and its specific structure will be described below.

Introduction of specific parts:

The housing 201: the structure is double-layer, and four rib plates are arranged between the two layers. The upper layer has 2 threaded holes and 4 stepped threaded through holes reserved for pressure sensor set screws 219. The lower layer is annular, and 4 through holes are uniformly arranged at intervals of 90 degrees on the periphery of the annular and are used for penetrating through the limit long screw 212. The inner side of the lower ring is threaded for mating with the threads on the outer side of the electromagnetic spring stator 209.

Scale thread post 202: is a stepped threaded post with a smaller diameter end that is fully threaded into a blind hole in the middle of the lower surface of the upper layer of the housing 201. The thicker diameter end is used for being connected with the upper pressure plate 203 and the lower pressure plate 205 in a threaded mode, scales are arranged on the lateral surface of the thicker diameter end and used for indicating the positions of the upper pressure plate 203 and the lower pressure plate 205, and a round boss is arranged at the tail end of the threads.

Upper platen 203: the upper pressure plate 203 is fixed on the outer side of the scale thread post 202 through threaded connection, and an upper thrust bearing 204 can be embedded by a stepped groove in the upper pressure plate 203.

Upper thrust bearing 204: is embedded in the stepped groove of the upper pressure plate 203, and when the upper pressure plate 203 rotates for a certain stroke and contacts with the outer spring 207, the friction between the upper pressure plate 203 and the outer spring 207 can be eliminated.

The lower platen 205: is fixed on the outer side of the scale thread post 202 through threaded connection and is positioned below the upper pressure plate 203, and a lower thrust bearing 206 can be embedded into a stepped groove in the lower pressure plate 205.

Lower thrust bearing 206: is inserted into the stepped groove of the lower pressure plate 205, and when the lower pressure plate 205 is brought into contact with the inner spring 208 after rotating for a certain stroke, friction between the lower pressure plate 205 and the inner spring 208 can be eliminated.

Outer spring 207: between the upper platen 203 and the chassis 215, both upper and lower are planar, and the bottom is clamped in an outer annular groove of the chassis 215.

Inner spring 208: between the lower platen 205 and the chassis 215, both upper and lower are planar, with the bottom portion being captured in an inner annular groove of the chassis 215.

Electromagnetic spring stator 209: the cylindrical structure has annular teeth inside, and one side end has external threads for connection with the internal threads of the housing 201. The outer side is provided with a wire outlet hole which is used for penetrating out of two ends of the electromagnetic spring coil 211 and is connected with an adjustable power supply 302.

Electromagnetic spring mover 210: the columnar structure is internally provided with annular teeth corresponding to the teeth of the electromagnetic spring stator 209, one side end part of the columnar structure is provided with a step, and the step is provided with external threads for being connected with the internal threads of the chassis 215.

Electromagnetic spring coil 211: regularly wound in the annular groove of the electromagnetic spring rotor 210, and two ends of the coil penetrate out of the wire outlet hole of the electromagnetic spring stator 209 to be connected with the adjustable power supply 302.

Limit long screw 212: the polish rod part and the thread part are divided, the limit long screw 212 passes through four through holes of the shell 201 and then is screwed into a threaded hole of the chassis 215, and the outer diameter of the polish rod part is smaller than the aperture of the shell and can vertically move in the hole.

Limit sleeve 213: the sleeve is sleeved on the limit long screw 212, can slide freely on the limit long screw 212 and is supported by the locking nut 214 below.

Lock nut 214: the four locking nuts 214 are screwed on the external threads of the limit long screw 212 and are located at the same height, so as to support the limit sleeve 213 and play a limit role.

Chassis 215: the central part has two annular grooves for catching the bottoms of the outer spring 207, the inner spring 208. There are two stepped through holes outwardly for passing through the chassis fixing screw 216 to fix the chassis 215 to the upper surface of the upper bearing housing 600. And an annular groove is formed outwards, and the inner wall of the groove is provided with internal threads for being in threaded connection with the electromagnetic spring rotor 210. Four uniformly distributed threaded blind holes are formed in the outermost side and are used for being in threaded connection with the limit long screws 212.

Chassis set screw 216: for securing the chassis 215 to the upper surface of the upper bearing cartridge 600.

The roll gap adaptive adjustment apparatus 2 is different from the state in which the pressure sensor 218 is attached and the state in which the pressure sensor 218 is not attached in that 2 conventional adjustment screw fixing screws 400 are replaced with 2 extension screw fixing screws 217, and the pressure sensor 218 and the pressure sensor fixing screws 219 are added. The roll gap adaptive adjustment apparatus 2 is shown in fig. 12 in a full sectional view with the pressure sensor 218 attached thereto, and in fig. 13 in an isometric view.

The following describes the specific parts of the roll gap adaptive adjustment apparatus 2 in the state where the pressure sensor 218 is attached: an elongated screw set screw 217, a pressure sensor 218, and a pressure sensor set screw 219.

Extension screw set screw 217: the adjusting screw 300 is fixed in a state of being specially used for installing the pressure sensor 218, and is longer than the conventional adjusting screw fixing screw 400, the end part of the adjusting screw is threaded and can be screwed into the threaded through hole on the housing 201, and the outer diameter of the polish rod part of the elongated screw fixing screw 217 is smaller than the aperture of the adjusting screw 300, so that the screw can slide in the hole of the adjusting screw 300.

Pressure sensor 218: the pressure sensor 218 has 4 screw thread blind holes evenly arranged at 90 intervals in the bottom, fixes on shell 201 through pressure sensor set screw 219, and the measurement pressure head at top offsets with the bottom surface of adjusting screw 300, and pressure sensor 218 has the pencil port to link to each other with pressure sensor signal acquisition module 304, and this acquisition module can be with data display on the data visualization software of computer end 303, the operator of being convenient for observes the atress condition in real time.

Pressure sensor set screw 219: and is threaded into the threaded hole of the pressure sensor 218 after passing through the four stepped threaded through holes of the housing 201, thereby fixing the pressure sensor 218 to the upper surface of the housing 201.

4. Principle of operation

1. Working principle of plate thickness detection device

Although the operator can know the plate thickness value of each plate by caliper measurement, the roll gap adaptive adjustment device 2 in the auxiliary system needs to receive the plate thickness data signal measured by the plate thickness detection device 1 as a working basis, so the plate thickness detection device 1 is required to serve as a pilot device of the roll gap adaptive adjustment device 2.

The plate thickness detection device 1 is installed between the adjusting screw 300 and the upper bearing box 600 of the flat-roller pass, and 1 plate thickness detection device is symmetrically installed in each of the two side housing areas 700, as shown in fig. 5. The upper and lower flat rolls of the flat roll pass in the initial state are just contacted, and the measuring head of the displacement sensor 105 in the plate thickness detecting device 1 is just contacted with the lower surface of the top plate 101 in the device, as shown in fig. 7 b. When no sheet material passes between the flat rolls, that is, when the sheet thickness detection apparatus 1 is not operating, the total weight of the upper flat roll, the upper flat roll shaft, and the upper bearing box 600 is borne by the 4 long screws 102 in the both-side sheet thickness detection apparatus 1. Since the outer diameter of the polished rod portion of the long screw 102 is smaller than the aperture of the top plate 101, the long screw 102 can slide vertically in the top plate 101. When a plate material enters between the flat rollers from the lead-in frame 100, the upper flat roller shaft and the upper bearing box 600 are jacked up by the plate material at the same time, and the plate material detection device 1 is fixed on the upper surface of the upper bearing box 600, so that the base 103, the long screw 102, the pressing block 104, the displacement sensor 105 and the pressing block fixing screw 106 of the plate material detection device 1 can move upwards at the same time, the top plate 101 of the device is fixed on the adjusting screw 300 and cannot move, so that the measuring head of the displacement sensor 105 is compressed by the top plate 101 to measure the ascending displacement value of the plate material detection device 1, the displacement value corresponds to the plate material value one by one, the plate material detection work is completed before the plate material enters the next forming pass, the plate material detection signal is sent to the control system 3, the control system 3 receives and judges, and the adjustable power source 302 of all the forming passes is sent a signal, and the adjustable power source 302 of each forming pass inputs current of a proper size to the corresponding roll gap self-adaptive adjusting device 2, so that the proper current is obtained before the forming roll gap self-adaptive adjusting device 2 enters the corresponding pass, and proper forming current is ensured to be given to the plate material after the plate material enters the proper forming force.

2. Working principle of electromagnetic spring

The system comprises two mechanical parts, namely a plate thickness detection device 1 and a roll gap self-adaptive adjustment device 2, and before introducing the working principle of the self-adaptive device, the working principle of an electromagnetic spring which is a core component in the self-adaptive device needs to be described.

Common electromagnetic springs can be divided into tooth-shaped electromagnetic springs and magnetic pole opposite electromagnetic springs according to different structural forms. The application adopts a tooth-shaped structural electromagnetic spring, which is hereinafter called tooth-shaped electromagnetic spring for short. The main structure of the tooth-shaped electromagnetic spring comprises a stator, a rotor and an electromagnetic coil.

When the electromagnetic spring works, after the exciting coil is electrified, a magnetic field is formed in a closed magnetic circuit formed by the stator gear ring, the stator yoke, the air gap, the rotor gear ring and the rotor yoke. When the rotor axially displaces relative to the stator, the tooth-shaped phase staggers to shift the air gap magnetic circuit, so that electromagnetic force which tries to restore the rotor gear ring to the restoring position, namely, tries to eliminate the relative displacement is axially generated, the electromagnetic force shows a characteristic similar to a sine curve in the continuous axial movement process of the rotor, a change curve diagram of the electromagnetic force along with the axial displacement of the rotor in one period is shown in fig. 14, wherein the ordinate F refers to the electromagnetic force of an electromagnetic spring, and the X refers to the axial displacement of the rotor. The electromagnetic force and the displacement are approximately in linear relation in the axial displacement range of 1/4 period of the rotor. This characteristic is similar to a mechanical spring and is therefore referred to as an electromagnetic spring. By changing the magnitude of the direct current flowing into the electromagnetic spring coil 211, the electromagnetic stiffness can be changed, so that the purpose of stiffness adjustment is achieved. In the period of 1/4 of the characteristic curve, under the condition that other factors such as control displacement and the like are unchanged, when the current is only changed, the electromagnetic force is increased along with the increase of the current, as shown in fig. 15, wherein I1 is more than I2 and less than I3 and less than I4 and less than I5, wherein the ordinate F refers to the electromagnetic force of the electromagnetic spring, and X refers to the axial displacement of the rotor. The approximately linear part of the 1/4 period of the electromagnetic spring characteristic curve is the part which needs to be used in the roll gap adaptive adjustment device.

3. Working principle of roll gap self-adaptive adjusting device

The roll gap adaptive adjustment apparatus 2 is installed between the bottom surface of the adjustment screw 300 of the forming pass from the second pass and the upper surface of the upper bearing cartridge 600 as shown in fig. 6.

In the initial state, the upper roll and the lower roll 900 of the forming pass provided with the roll gap adaptive adjustment device 2 are in contact with each other, and when no sheet material passes between the rolls, that is, when the roll gap adaptive adjustment device 2 is not operated, the total weight of the upper roll, the upper roll shaft 800 and the upper bearing cartridge 600 is borne by 8 limit screws 212 in the two-side roll gap adaptive adjustment device 2. Since the outer diameter of the polish rod portion of the limit long screw 212 is smaller than the aperture of the through hole of the housing 201, the limit long screw 212 can vertically slide in the through hole of the housing 201.

After the plate is bitten by the forming roller, the plate can jack up the upper roller 900 because the plate has a certain thickness, the roller shaft is inserted into the left bearing box and the right bearing box because the roller is connected on the roller shaft in series, so the roller shaft and the two bearing boxes are finally jacked up together, and the chassis 215 of the roll gap self-adaptive adjusting device 2 is fixed on the upper surface of the upper bearing box 600, so the chassis 215 of the roll gap self-adaptive adjusting device 2 is jacked up at the same time, and then the upper roller 900, the upper bearing box 600 and the upper roller shaft 800 are jacked up together to a certain height, so the self-adaptive device is compressed to generate spring force. It is therefore necessary to determine the relationship between the sheet thickness and the height at which the rolls are lifted. When the upper roll 900 and the lower roll are in contact with each other in the initial state, the upper roll 900, the upper bearing box 600 and the upper roll shaft 800 are pushed up because the lower roll is fixed, so that the plate thickness value is uniquely corresponding to the rising amount of the upper roll of each pass in the case of the fixed and normal forming of the plate section, and the self-adapting device is installed between the bottom surface of the adjusting screw 300 and the upper surface of the upper bearing box 600, so that the rising amount of the upper roll of each pass is equal to the compressed amount of the roll gap self-adapting device 2, so that the plate thickness value is uniquely corresponding to the compressed amount of the roll gap self-adapting device 2, namely, if the plate material of a certain thickness enters between the adjusting screw 300 and the upper bearing box 600, the thickness is converted into the compressed amount of the self-adapting device 2. Let the plate thickness values be t1, t2, t3, & gt, and tn, the compressed amounts of the corresponding roll gap adaptive adjustment devices 2 are X1, X2, X3, and Xn, respectively, wherein the plate thickness value of the same subscript uniquely corresponds to the compressed amount of the roll gap adaptive adjustment device 2.

The toothed electromagnetic spring described above is part of an adaptive device, the principle of which has been described in relation to. The self-adaptive device comprises an electromagnetic spring and two traditional spiral springs connected in parallel with the electromagnetic spring, wherein the spiral springs have linear stiffness, the inner spring 208 and the outer spring 207 are called according to the directions, the stiffness of the inner spring 208 is denoted as k1, the stiffness of the outer spring 207 is denoted as k2, and the two traditional spiral springs are different in height. Above each spring is a corresponding pressure plate, the lower surface of the pressure plate corresponding to the inner spring 208 is just contacted with the upper surface of the inner spring 208, and an adjustable distance is reserved between the lower surface of the pressure plate corresponding to the outer spring 207 and the upper surface of the outer spring 207, which is denoted as d. If the action of the electromagnetic springs is temporarily not taken into account, the characteristic curves of two parallel helical springs when compressed are shown in fig. 16, where F is the spring force and X is the compressed displacement of the springs. The characteristic curve is a two-section broken line, the turning time can be controlled in advance by manually changing the d value, namely, the distance d between the upper pressure plate 203 and the outer spring 207 is adjusted by rotating the upper pressure plate 203, and the adjustment quantity can be compared with the scales on the scale thread column 202.

As can be seen from fig. 16, the characteristic curves of the two parallel spiral springs when compressed are two-section broken lines, in the two parallel spiral springs, since a section of distance d is provided between the outer spring 207 and the corresponding pressure plate, and the inner spring 208 is just in contact with the corresponding pressure plate in the initial state, the first section of the characteristic curve starts from the origin, the slope is the stiffness k1 of the inner spring 208, after the compression displacement passes the distance d, the outer spring 207 is in contact with the corresponding pressure plate, and the two springs start to act simultaneously, so that the characteristic curve turns when the displacement reaches d, and the slope of the second section is the sum of the stiffness of the inner spring 208 and the outer spring 207, namely k1+k2.

In the roll bending forming process, the forming force required by sheet forming in a certain pass increases along with the increase of a single factor of the plate thickness in a way close to an exponential way, but not in a simple linear relation, so that by reasonably selecting the rigidities k1 and k2 of the two spiral springs, the characteristic curve of the combination of the two spiral springs is just below the relation curve of the forming force and the plate thickness, the increasing trend is basically consistent with the trend of the relation curve of the forming force and the plate thickness, the matching effect can be achieved by selecting the two springs in parallel connection, and the matching effect is irrelevant to the number of the plate thickness types, as shown in fig. 17, wherein the dotted line is the relation curve of the forming force and the plate thickness, the increasing trend close to the exponential way is shown, and the solid line is the characteristic curve of the two spiral springs connected in parallel when the spiral springs are compressed.

As can be seen from fig. 17, only by using the two parallel coil springs, there is a certain gap between the combined spring force and the forming force, so that the toothed electromagnetic spring with adjustable stiffness, i.e. adjustable spring force, in the self-adapting device is considered to be parallel to the coil springs, and the gap between the spring force and the forming force can be made up by selecting a proper current for the toothed electromagnetic spring to reach the proper electromagnetic spring force, so that the whole self-adapting device can reach the required forming force, i.e. the integral characteristic curve of the self-adapting device and the forming force curve intersect at a proper position. As can be seen from fig. 17, although the forming force curve increases exponentially with increasing plate thickness, the difference between the forming force curve and the coil spring combined characteristic curve does not increase significantly with increasing displacement, and therefore the work load of the electromagnetic spring does not increase with increasing plate thickness, but is stabilized in a substantial range, and the difference between the forming force and the characteristic curve is always kept in the range of (0 to Δf) N, assuming that the maximum difference force between the forming force curve and the coil spring combined characteristic curve is Δ f N. Therefore, the two coil springs are connected with the electromagnetic spring in parallel, and the two traditional coil springs of the outer spring and the inner spring bear most of plate forming force, so that the design requirement and the work load of the electromagnetic spring are reduced. After considering the action of the electromagnetic spring on the basis of two conventional coil springs, the characteristic curve of the whole roll gap self-adaptive adjusting device is changed as shown in fig. 18, wherein F is the total spring force of the self-adaptive device, and X is the compression displacement of the self-adaptive device. The whole self-adaptive device is formed by connecting the parallel spiral springs and the electromagnetic springs in parallel, so that the characteristic curve chart is equivalent to adding the 1/4 cycle characteristic curve of the electromagnetic springs at a proper current in fig. 15 and the characteristic curves of the two parallel spiral springs in fig. 16. Therefore, in fig. 18, the first segment of the characteristic curve of the roll gap adaptive adjustment device is the effect of the combined action of the inner coil spring and the electromagnetic spring, and the second segment is the effect of the combined action of the outer coil spring, the inner coil spring and the electromagnetic spring. Since the relation of the electromagnetic spring force to the displacement of the mover is not linear, this results in a characteristic curve of the whole device which is also not linear.

For example, in the normal forming process of a sheet of a certain thickness tn, the upper roller is lifted up by Xn, that is, the compression displacement of the roll gap adaptive adjustment device 2 is Xn, the forming force required when the sheet of a certain thickness is formed well is Fn, the simulation shows that when the electromagnetic spring coil 211 in the electromagnetic spring is fed with current with the size of in, the intersection point of the characteristic curve of the whole adaptive device and the forming force curve is just (Xn, fn), that is, the characteristic curve of the whole adaptive device passes through (Xn, fn), as shown in fig. 19, F is the total spring force of the adaptive device, X is the compression displacement of the adaptive device, so that an operator can obtain the most suitable electromagnetic spring current size when forming sheets of different thicknesses through simple simulation, and the corresponding relation between the displacement generated by the plate thickness and the current of the electromagnetic spring coil 211 is written into the control system as the basis for identifying, judging and controlling the adjustable power supply by the control system.

The roll gap self-adaptive adjusting device 2 has two working states of locking and non-locking, and is used for operators to select according to actual needs so as to be suitable for different working conditions. Taking the roll gap adaptive adjustment device 2 without the pressure sensor 218 as an example, the pair before and after locking is shown in fig. 20 (a) and 20 (b). The total weight of the upper roll 900, the upper roll shaft 800 and the bearing cartridges 600 on both sides is denoted as G, and friction between the upper bearing cartridge 600 and the inner wall of the housing 700 and the self weight of the roll gap adaptive adjustment device 2 are not considered when the upper bearing cartridge 600 moves in the vertical direction. When the upper surface of the limit sleeve 213 is spaced from the lower surface of the housing 201, the state is unlocked, as shown in fig. 20 a; when the operator rotates the lock nut 214 upward, the upper surface of the limit sleeve 213 is pushed against the bottom of the housing 201 and then the lock nut 214 is tightened, as shown in fig. 20 b. Specific applications for both states are discussed in detail below. When the device is in the non-locking state, the device has a roll gap self-adaptive adjustment function, when the device is in the locking state, the device does not have the roll gap self-adaptive adjustment function any more, the roll gap can be adjusted only by using the traditional rotation adjusting nut 500, and in certain occasions, the quick switching between the two states is of great significance.

Non-lockup state application: when the system needs to form the plate with the required forming force F not less than G, the system belongs to the normal working state of the device, and most working conditions belong to the state. The operator can adjust the distance between the upper surface of the limit sleeve 213 and the lower surface of the housing 201 by rotating the lock nut 214, and the preset distance is the maximum compressible distance of the roll gap self-adaptive adjustment device 2, so that the device has a safety limit function and prevents the roll gap self-adaptive adjustment device 2 from being damaged in the process of forming the thick plate.

Locked state applications: in the first application case, when the system needs to form a plate with the required forming force F less than the total weight G, the total weight G indicates that the plate can be "pressed" until the plate is formed or even crushed, so when the plate with the forming force F less than G needs to be processed, the self-adaptive device needs to be locked, the self-adaptive adjustment function is stopped, and the traditional roll gap adjustment function of the adjusting nut 500 is restored by using a wrench; in the second application, the auxiliary system cannot work continuously due to failure of certain links, and only when the traditional roll gap adjusting function is used for forming, locking is needed, and after the system is repaired, the locking nut 214 can be lowered to restore the roll gap self-adaptive adjusting function.

4. Composition and working principle of control system

The auxiliary system is provided with a set of control system 3 besides two mechanical parts of the plate thickness detection device 1 and the roll gap self-adaptive adjustment device 2. The control system 3 is schematically shown in fig. 21, and includes a controller 301, an adjustable power supply 302, a computer end 303, a pressure sensor signal acquisition module 304, and a displacement sensor 105 in the plate thickness detection device 1 and a pressure sensor 218 in the roll gap adaptive adjustment device 2, where it is assumed that the pressure sensor 218 is installed in each roll gap adaptive adjustment device 2.

The specific components of the control system 3 are as follows, wherein both the displacement sensor 105 and the pressure sensor 218 have been specifically described in the description of the structure of the plate thickness detecting device 1 and the roll gap adaptive adjustment device 2, respectively, and are not described herein.

The controller 301: the controller 301 is a core of the whole control system 3, and in order to achieve the purpose of controlling the adjustable power supplies 302, a plurality of analog output expansion modules are additionally arranged on the basis of the controller 301 according to the number of the adjustable power supplies 302. For simplicity of description, the analog output expansion module is considered part of the controller 301 in this application. The controller 301 is equipped with a dedicated drive unit and is mounted on the computer side 303.

An adjustable power supply 302: the adjustable power supply 302 is provided with an interface which can be controlled by a direct current analog voltage signal, and can be controlled by the controller 301 so as to output a voltage or current with a proper magnitude. The number of the adjustable power supplies 302 is equal to the number of forming passes, that is, two roll gap adaptive adjustment devices 2 in the same forming pass share one adjustable power supply 302.

Computer end 303: two types of software are installed in the computer end 303. The special driving unit matched with the controller 301 can program the controller 301 in the software, and an operator can set a monitoring window for acquiring the numerical value of the displacement sensor 105 in the software, so that the operator can monitor the measurement result of the displacement sensor 105 in real time; and secondly, the monitoring software can be matched with the pressure sensor 218, so that an operator can conveniently monitor the measurement result of the pressure sensor 218 in real time.

Pressure sensor signal acquisition module 304: the pressure sensor signal acquisition module 304 can process and convert the original signal acquired by the pressure sensor 218, and serve as a relay between the pressure sensor 218 and the computer end 303.

The control system is connected in the following manner, and comprises a working path and a monitoring path:

working path connection: the two displacement sensors 105 of the first, i.e. flat roll, pass are connected to a controller 301, the controller 301 is connected to a number of adjustable power supplies 302, the number of adjustable power supplies 302 being equal to the number of forming passes starting from the second pass, one adjustable power supply 302 per forming pass being connected to both roll gap adaptation devices 2 of the pass simultaneously, powering the electromagnetic spring coils 211 in the roll gap adaptation devices 2. The above is a working path connection method for realizing the system function. As shown by the bold curve in fig. 21.

Monitoring path connection: after the two displacement sensors 105 of the flat-roller pass are connected to the controller 301, the controller 301 sends the plate thickness signal to the controller driving unit of the computer end 303, and a graph of the displacement measurement result over time is displayed in real time in a display window of the software. Meanwhile, the pressure sensor 218 in the forming pass transmits the pressure signal to the pressure sensor signal acquisition module 304, the acquisition module transmits the processed signal to the monitoring software matched with the pressure sensor 218 at the computer end 303, and a graph of the pressure measurement result changing along with time is displayed in a display window of the software in real time. The monitoring path connection mode is convenient for installation and debugging before the operation of an operator system and real-time monitoring and use during the operation of the system. As shown by the thin solid curve in fig. 21.

The working principle of the control system is as follows:

firstly, a plate enters a space between an upper flat roller and a lower flat roller of a first pass, namely a flat roller pass, a displacement sensor 105 in a plate thickness detection device 1 installed in the flat roller pass measures and acquires a displacement signal corresponding to the plate thickness, the displacement signal is transmitted to a controller 301, the controller 301 receives the displacement signal transmitted by the displacement sensor 105 in the plate thickness detection device 1, and the corresponding relation between a preset displacement value Xn in the controller 301 and a current value in of each pass is combined to perform quick identification and judgment, so that an adjustable power supply 302 of each pass is controlled to supply proper current to electromagnetic spring coils 211 in two roll gap self-adaptive adjustment devices 2 of each forming pass before the plate enters the forming pass from the second pass, the current is supplied to the two roll gap self-adaptive adjustment devices 2 of the same pass, and the current supplied to the two roll gap self-adaptive adjustment devices 2 of different passes are basically different, so that the plate is guaranteed to be subjected to proper forming force after entering each forming pass, the forming is completed, and finally the plate with good processing quality is obtained. When an operator needs to monitor the plate thickness condition of the plate being processed in real time, the controller 301 can transmit a displacement signal to a visual window of a special driving unit of the controller 301 of the computer end 303, and the plate thickness detected by the displacement sensor 105 is displayed in real time to know the working condition of equipment.

When an operator needs to monitor the forming force of each pass in real time, signals of the two pressure sensors 218 of a certain pass are transmitted to the pressure sensor signal acquisition module 304 and then transmitted to monitoring software matched with the pressure sensors 218 of the computer end 303, so that the same pass can display detection curves of the two sensors in a display frame, because the plate needs larger forming force during forming, before the pressure sensors 218 are stressed, the upper roller 900, the upper roller shaft 800 and the upper bearing box 600 are jacked, the total weight G is also a part of assisting in forming the plate, therefore, during post-processing of detection data of the pressure sensors 218, the measured values f1 and f2 of the two side pressure sensors 218 of the same pass are added with the total weight G of the upper roller 900, the upper roller shaft 800 and the upper bearing box 600 of the same pass, and the sum of f1, f2 and G is the forming force of the plate, therefore, through simple calculation, the operator can monitor the forming force applied to the plate during forming process of each pass and record the forming force of the plate, and can adjust the forming force of each pass for the plate according to the forming quality of each pass.

The operator at the computer end 303 can monitor the thickness of the sheet material being formed at the moment through the visual window of the special driving unit of the controller 301, and can detect the sheet material forming force through the monitoring software of the pressure sensor 218, so that the operator can know the equipment condition in real time.

5. Effects and advantages of the invention

1. The system solves the surface problem of self-adaptation of the roll gap by utilizing the elasticity of the elastic body, and solves the essential problem of self-adaptation of forming force of a deeper level by utilizing the flexible and adjustable rigidity characteristic of the tooth-shaped electromagnetic spring, thereby achieving the real plate thickness self-adaptation. The operator can meet the forming requirement of any thickness of the plate in the working range by setting the corresponding relation between various plate thicknesses and the current flowing in the tooth-shaped electromagnetic spring in the control system in advance, and the system can accurately achieve the required forming force, namely the capability of continuously adapting to the plate with any plate thickness, wherein the forming force F is larger than the total weight G, and the upper limit of the plate thickness variety number is avoided in the working range. When a new plate thickness appears, the plate thickness and the current of the electromagnetic spring coil 211 required by the plate thickness are added in the program, and the system can be automatically adapted and adjusted without human intervention, so that the forming quality of the plate is ensured to be good.

2. The system divides the realization of the roll gap self-adaptive adjustment function required by the traditional roll bending equipment into two important components, namely a plate thickness detection device 1 and a roll gap self-adaptive adjustment device 2, which are structurally independent of each other and can carry out signal communication, wherein the design, arrangement and transformation of the plate thickness detection device 1 can not cause any influence on the structure of the roll gap self-adaptive adjustment device 2, and vice versa. By dividing the overall target function of the system into two parts, the overall structure can be simplified, and the design, the manufacture and the application are convenient.

3. The disassembly and assembly of all mechanical parts of the system can not cause any damage or influence on the functions of the traditional roll bending forming equipment, and particularly, the plate thickness detection device 1 is arranged between the adjusting screw 300 of the flat roll pass and the upper bearing box 600, the roll gap self-adaptive adjusting device 2 is arranged between the adjusting screw 300 of the forming pass and the upper bearing box 600, and the original state of the traditional roll bending forming equipment can be restored after the two devices are disassembled.

4. If the working condition changes greatly, when an operator needs to adjust turning points of the combined characteristic curves of the two spiral springs in the roll gap self-adaptive adjusting device 2, the upper pressure plate and the lower pressure plate only need to be manually rotated and adjusted, and the operator can intuitively know the relative positions between the springs and the pressure plates through the scale design on the scale thread columns 202, so that the operation is intuitive and convenient.

5. There are two adjustment modes that can be selected depending on whether the lock nut 214 of the roll gap adaptive adjustment apparatus 2 is locked: traditional manual roller gap adjustment and self-adaptive roller gap adjustment; there are two measurement states that are selectable depending on whether the pressure sensor 218 is installed: the system has the forming force monitoring function and the non-forming force monitoring function, can be used for testing and scientific research experiments in the state of being provided with the pressure sensor 218, saves more cost and occupied space in the state of not being provided with the pressure sensor 218, and can be used for long-term practical engineering application of enterprises. And the two adjusting modes and the two measuring states can be matched randomly, namely, the method comprises the following steps: the automatic forming machine has the advantages that the traditional manual roller gap adjusting mode with the forming force monitoring function, the traditional manual roller gap adjusting mode without the forming force monitoring function, the self-adaptive roller gap adjusting mode with the forming force monitoring function and the self-adaptive roller gap adjusting mode without the forming force monitoring function are selectable, and the automatic forming machine can be used for the requirements of different working conditions and is flexible and changeable.

6. The roll gap self-adaptive adjusting device has a safety limiting function and a failure emergency protection function, and particularly through the design of the locking nut 214 and the limiting sleeve 213 which are matched with the limiting long screw 212, an operator can accurately control the distance between the limiting sleeve 213 and the bottom surface of the shell 201, so that the maximum allowable compression amount of the device is adjusted, and the device is prevented from being damaged by a large amount of overpressure due to the fact that a thick plate is wrongly inserted. If the device fails, the operator can completely lock the lock nut 214, that is, the limit sleeve 213 can achieve the effect of complete locking when abutting against the lower surface of the housing 201, the working capacity of the roll gap self-adaptive adjusting device 2 is suspended, and the operator can temporarily change the traditional manual roll gap adjusting method to ensure that the roll bending equipment continues to work, so that the production progress is not delayed. That is, the system has the capability of flexibly and quickly switching between the traditional roll gap adjusting method and the roll gap self-adaptive adjusting method.

7. The core component of the self-adaptive device part in the system is an electromagnetic spring with adjustable rigidity, complex driving elements such as a motor and hydraulic pressure are not used, the spring with adjustable rigidity and the traditional spring are connected in parallel, parts or materials which need special process processing are not used, the structure is simple, the processing is convenient, and the cost is low.

6. The working process of the specific embodiment comprises the following steps:

1. preparation:

step 1, assembling and mounting of the plate thickness detection device 1: the operator completes the assembly of the 2 plate thickness detection devices 1, ensures that the measuring heads of the displacement sensors 105 are just contacted with the lower surface of the top plate 101 in the plate thickness detection devices 1, then installs the plate thickness detection devices 1 into the two side housing archways 700 of the first pass, namely between the adjusting screw 300 of the flat roller pass and the upper bearing box 600, then uses a spanner to rotate the adjusting nuts 500 of the two sides, ensures that the upper flat roller and the lower flat roller of the flat roller pass are just contacted, and then leaves the wire harness end of the displacement sensors 105 in the plate thickness detection devices 1 for standby.

Step 2, assembling and installing the roll gap self-adaptive adjusting device 2: the operator calculates the required rough forming force of plates with various thicknesses according to the roll bending forming force calculation formula in the related roll bending forming field related to the force energy parameter research literature, obtains the relation curve of forming force and plate thickness, selects the inner spring 208 and the outer spring 207 with proper rigidity and length according to the curve, adjusts the size of the distance d between the outer spring 207 and the corresponding pressure plate, ensures that the combined characteristic curve of the inner spring and the outer spring is below the forming force curve, and basically accords with the incremental trend, as shown in fig. 17, and supposes that the pressure sensors 218 are additionally arranged in all the roll gap self-adaptive adjusting devices 2 in the embodiment, after the roll gap self-adaptive adjusting devices 2 are assembled, the roll gap self-adaptive adjusting devices are arranged in the two side housings 700 of the second pass and all subsequent forming passes, namely, between the adjusting screw 300 of the forming pass and the upper bearing box 600, then uses a spanner to rotate the adjusting nuts 500 on the two sides, ensures that the upper forming roller and the lower forming roller are contacted, and then the ends of the electromagnetic spring coil 211 and the standby wire harness 218 in the roll gap self-adaptive adjusting devices 2 are reserved.

Step 3, connecting a control system: after the working path and the monitoring path of the control system 3 are connected, the level of the flat roller shaft is ensured by comparing the values of the displacement sensors 105 on the two sides of the flat roller pass displayed by the computer end 303, and the condition that the bearing boxes on the two sides of the flat roller pass are higher and lower is avoided. The level of the forming roll shaft is ensured by comparing the values of the two side pressure sensors 218 of each forming pass displayed by the computer end 303, and the condition that the bearing boxes on the two sides of the forming pass are higher and lower is avoided.

Step 4, pre-testing: before the plate thickness adaptive roll forming auxiliary system is formally used for carrying out the adaptive forming of the plate materials, the optimal forming force F required by the plate materials with each thickness t needs to be obtained. First, the lock nut 214 is tightened, and at this time, the roll gap self-adaptive adjustment device 2 does not have the capability of self-adaptively adjusting the roll gap, so that the roll bending device is restored to the conventional mode, that is, the mode of adjusting the size of the roll gap by rotating the adjustment nut 500 through a wrench, but the pressure sensor 218 still can function, that is, the forming force applied during the plate forming process can still be measured. According to the thickness of the test plate used for the pre-test, a spanner is used for rotating the adjusting nut 500 of each pass, so that the roll gap value of each pass is adjusted to the optimal roll gap size required by forming the thickness plate, a clearance gauge is used for checking, and the first-type plate thickness pre-test can be performed after the checking is finished. And roll forming is carried out on each plate with the thickness t to be tested one by one, and the forming force F required by each pass of forming of the plate with the thickness is recorded. And manually adjusting the roll gap of each pass again to be suitable for the plate with the next thickness, and then testing the forming force F required by the plate with the next thickness. After the pre-test is completed, the operator can obtain a database of each thickness t plate and its optimal forming force F required for forming in each pass. According to the correspondence between the plate thickness and the rising amount of the upper roll 900, and the rising amount of the upper roll 900 is equal to the compressed amount of the adaptive device, the operator can finally obtain the relationship between the compressed amount X of the adaptive device and the forming force to be provided, that is, the spring force F.

Step 5, data processing and current size determination: after the operator obtains the relation between the compressed amount X of the adaptive device and the forming force required to be provided, namely the spring force F, the electromagnetic spring force required by each thickness plate during forming in each pass is determined according to the difference between the forming force curve and the combination characteristic curve of the spiral spring, so that the coil current i required to be fed into the electromagnetic spring coil 211 during forming in each pass of each thickness t plate is obtained. The corresponding relation between the plate thickness t and the current i is input into the control system, and after the plate thickness detection device 1 detects the plate thickness and transmits the plate thickness to the control system 3, the control system 3 can quickly react, and the corresponding current is supplied to the electromagnetic spring coil 211 in the self-adaptive device of each pass before the plate material enters the forming pass. Releasing the lock nut 214 restores the device to an adaptive operating state. The preparation work of the whole system is finished so far, and the whole system can be put into the self-adaptive roll bending forming work.

2. Normal use:

step 1, processing a plate with forming force F being more than or equal to G: after the locking state of the locking nut 214 is released, the plate is pulled out from one end of the uncoiler and enters a flat roll pass, the plate thickness t is detected by the plate thickness detection device 1, after the plate thickness signal is transmitted to the control system 3, the control system 3 rapidly judges the current corresponding to the required electromagnetic spring coil 211, and sends the signal to the adjustable power supply 302, the adjustable power supply 302 supplies the required current to the self-adaptive device of each pass, so that the pressure born by the plate after the plate is jacked up by the upper roll 900 after entering the forming pass is just the required forming force, the plate is smoothly formed in the pass, the pressure born by the upper roll 900 after being jacked up is just the required forming force after entering the next forming pass, the plate is smoothly formed in the pass, the subsequent pass is similarly pushed out, and finally the plate is hydraulically sheared off from the last pass to form a cold-formed steel product with qualified forming quality.

Step 2, processing a plate with the forming force F smaller than G: because the forming force required for some thinner sheet materials is less than G, the sheet materials can be formed and even crushed by the dead weight G of the upper roll 900, the upper roll shaft 800 and the upper bearing box 600, so that an adaptive adjusting device is not required, the locking nut 214 is locked, namely, the adaptive adjusting function is closed, the roll bending equipment is restored to a mode of manually adjusting the roll gap, an operator uses a traditional mode of sequentially rotating the adjusting nut 500 of each pass by using a spanner, thereby adjusting the roll gap of each pass, and then the sheet materials enter from the first pass and finish forming. Finally, the cold-formed steel product is cut off by hydraulic pressure from the last pass to form the cold-formed steel product with qualified forming quality.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims. The information disclosed in the background section herein is only for enhancement of understanding of the general background of the invention and is not to be taken as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.

Claims

1. The utility model provides a roll bending forming equipment auxiliary system of automatically regulated roll gap, roll bending equipment is including leading-in frame (100), first pass, second pass and the follow-up pass that arrange in proper order, first pass is the plain-barreled pass, second pass and follow-up pass are the shaping pass, first pass, second pass and follow-up pass include gland (200), adjusting screw (300), adjusting screw set screw (400), adjusting nut (500), go up bearing box (600), memorial archway (700), go up roll axle (800), go up roll (900), its characterized in that respectively:

plate thickness detection devices (1) are respectively arranged between the adjusting screws (300) of the two archways and the upper bearing box (600) of the flat roller pass;

a roll gap self-adaptive adjusting device (2) is respectively arranged between the adjusting screws (300) of the two housing archways and the upper bearing box (600) of the forming pass;

also comprises a set of control system (3);

the plate thickness detection device (1) comprises: a top plate (101), a long screw (102), a base (103), a pressing block (104), a displacement sensor (105), a pressing block fixing screw (106) and a base fixing screw (107);

the top plate (101) is a strip-shaped plate, the middle of the top plate is provided with two threaded through holes, and the outer side of the top plate is provided with two light holes;

two threaded through holes are formed in the outer side of the base (103), two stepped through holes are formed in the middle of the base, a boss is arranged in the center of the base, and a semicircular column groove is formed in the vertical direction of the boss;

The adjusting screw (300) is connected with two threaded through holes in the middle of the top plate (101) through an adjusting screw fixing screw (400), the long screw (102) penetrates through two light holes in the outer side of the top plate (101) to be connected with the threaded through holes in the outer side of the base (103), and the base fixing screw (107) penetrates through two stepped through holes in the middle of the base (103) to fix the base (103) on the upper surface of the upper bearing box (600);

a semicircular column groove is formed in the middle of the pressing block (104) in the vertical direction, is matched with the semicircular column groove in the boss vertical direction of the base (103), and is connected with and clamps the displacement sensor (105) through the pressing block fixing screw (106);

the roll gap self-adaptive adjusting device (2) comprises: the device comprises a shell (201), a scale thread column (202), an upper pressure plate (203), an upper thrust bearing (204), a lower pressure plate (205), a lower thrust bearing (206), an outer spring (207), an inner spring (208), an electromagnetic spring stator (209), an electromagnetic spring rotor (210), an electromagnetic spring coil (211), a limit long screw (212), a limit sleeve (213), a lock nut (214), a chassis (215) and a chassis fixing screw (216);

the shell (201) is of a double-layer structure, two layers are connected through four rib plates, 2 threaded holes, 4 reserved stepped threaded through holes for installing pressure sensor fixing screws (219) and one threaded blind hole on the lower surface are formed in the upper layer, the lower layer is of an annular structure, 4 through holes are uniformly distributed on the lower layer at intervals of 90 degrees, and internal threads are formed in the inner side of the annular structure;

When the pressure sensor (218) is not arranged, the 2 threaded holes on the upper layer are connected with the adjusting screw (300) through the adjusting screw fixing screw (400);

when the pressure sensor (218) is additionally arranged, the 2 threaded holes on the upper layer are connected with the adjusting screw (300) through the lengthened screw fixing screws (217);

the scale thread column (202) is a stepped thread column, threads at one end with smaller diameter are completely screwed into the thread blind holes on the lower surface of the upper layer of the shell 201, scales are arranged on the side surface of the part with larger diameter, and a round boss is arranged at the tail end of the threads;

the upper pressing plate (203) is fixed on the outer side of the scale thread column (202) through threaded connection, a stepped groove is formed in the lower surface of the upper pressing plate (203), and the upper thrust bearing (204) is embedded in the stepped groove;

the lower pressure plate (205) is fixed on the outer side of the scale thread column (202) through threaded connection and is positioned below the upper pressure plate (203), a stepped groove is formed in the lower surface of the lower pressure plate (205), and the lower thrust bearing (206) is embedded in the stepped groove;

the middle part of the upper surface of the chassis (215) is provided with two annular grooves, two stepped through holes are outwards arranged in the annular grooves, an annular groove with internal threads is outwards arranged on the inner wall of the annular groove, four uniformly distributed threaded blind holes are formed in the outermost side of the annular groove, and the chassis fixing screw (216) penetrates through the two stepped through holes to fix the chassis (215) on the upper surface of the upper bearing box (600);

The electromagnetic spring stator (209) is of a cylindrical structure, the inner wall of the electromagnetic spring stator is provided with annular teeth, the wall is provided with a wire outlet hole, one end of the electromagnetic spring stator is provided with external threads, and the external thread end is connected with internal threads at the lower layer of the shell (201);

the electromagnetic spring rotor (210) is of a columnar structure with a through hole in the core part, the outer wall of the electromagnetic spring rotor is provided with an annular groove and annular teeth corresponding to the annular teeth on the inner wall of the stator, one end of the electromagnetic spring rotor is provided with a step, an external thread is arranged at the step, and the external thread is connected with the annular groove with an internal thread on the chassis (215);

the electromagnetic spring coils (211) are regularly wound in annular grooves on the outer wall of the electromagnetic spring rotor (210), and two ends of each coil penetrate out of wire outlet holes on the wall of the electromagnetic spring stator (209) to be connected with a power supply;

the outer spring (207) and the inner spring (208) are sleeved together and pass through a core through hole of the electromagnetic spring rotor (210), the outer spring (207) is positioned between the upper pressure plate (203) and the chassis (215), the inner spring (208) is positioned between the lower pressure plate (205) and the chassis (215), the upper end and the lower end of the outer spring (207) and the lower end of the inner spring (208) are both planes, and the lower end of the outer spring is clamped in an outer annular groove of the chassis (215);

the limiting long screw (212) comprises a polish rod part and a threaded part, the limiting long screw (212) penetrates through a through hole in the lower layer of the shell (201) and then is screwed into a threaded blind hole of the chassis (215), the outer diameter of the polish rod part is smaller than the aperture of the through hole, the limiting sleeve (213) is sleeved on the limiting long screw (212), and the locking nut (214) is screwed on an external thread of the limiting long screw (212) to support the limiting sleeve (213).

2. The auxiliary system for roll bending forming equipment capable of automatically adjusting roll gaps according to claim 1, wherein 4 threaded blind holes are uniformly formed in the bottom of the pressure sensor (218) at intervals of 90 degrees, the pressure sensor is fixed in a reserved through hole in the upper layer of the shell (201) through a pressure sensor fixing screw (219), and a measuring pressure head at the top of the pressure sensor (218) is abutted against the bottom surface of the adjusting screw (300).

3. Roll forming apparatus auxiliary system for automatically adjusting roll gap according to claim 1 or 2, characterized in that the control system (3) comprises a controller (301), an adjustable power supply (302), a computer terminal (303) and a pressure sensor signal acquisition module (304);

the controller (301) is respectively connected with the displacement sensor (105) and the pressure sensor (218);

the pressure sensor signal acquisition module (304) acquires an original signal of the pressure sensor (218) to be processed and converted and then transmitted to the computer end (303);

the computer end (303) is provided with a special driving unit matched with the controller (301), the driving unit is provided with a monitoring window for acquiring values by the displacement sensor (105), and the computer end (303) is also provided with monitoring software matched with the pressure sensor (218);

The number of the adjustable power supplies (302) is equal to the number of forming channels, namely, two roll gap self-adaptive adjusting devices (2) in the same forming channel share one adjustable power supply (302).