CN114054554A

CN114054554A - Roll bending forming equipment auxiliary system capable of automatically adjusting roll gap

Info

Publication number: CN114054554A
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: 2022-02-18
Anticipated expiration: 2041-11-23
Also published as: CN114054554B

Abstract

The invention discloses an auxiliary system of roll bending forming equipment capable of automatically adjusting a roll gap, wherein the roll bending equipment comprises a guide-in 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 memorial archway, an upper roll shaft and an upper roll; plate thickness detection devices are respectively arranged between the adjusting screw rods of the two memorial archways of the flat roll pass and the upper bearing box; roller gap self-adaptive adjusting devices are respectively arranged between the adjusting screw rods of the two memorial archways of the forming pass and the upper bearing box; the roll gap can be automatically and accurately adjusted according to different plate thicknesses, the forming force required by the forming of the plate with the thickness can be achieved, manual intervention is not needed in the working process, and the good forming quality of the plate is ensured; the structure and the function of the traditional roll bending equipment are not damaged when the roll bending equipment is disassembled and assembled; and has emergency adjustment capability in the event of failure.

Description

Roll bending forming equipment auxiliary system 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 generally, a metal strip is bent and deformed by a roller in multiple passes through the roller in sequence by adopting a multi-pass roll bending forming machine arranged in sequence, so that a product with a specified section shape is produced.

In recent years, roll bending products are more and more widely applied due to good surface quality and comprehensive performance, and with the continuous maturity of roll bending technology, section steel products are developing towards the directions of high strength, high precision and more complex sections, roll bending equipment used by large-scale enterprises is more and more automated, so that the roll bending products have faster production technology and have great advantages in terms of market competition. However, most roll bending manufacturers in China currently have a significant problem in producing steel plates with certain precision and thickness, namely the flexibility of equipment in production is not high enough. As the roll bending equipment needs to form plates with different thicknesses when in work, the roll gap between the upper roll and the lower roll of each pass of the roll bending forming machine needs to be frequently adjusted to be proper to adapt to different plate thicknesses. The roll bending equipment has a memorial archway type and a guide pillar type from the basic appearance, the memorial archway type roll bending equipment is characterized in that a bearing box slides between the inner walls of the memorial archways to adjust a roll gap, the guide pillar type roll bending equipment is characterized in that the bearing box sleeves the two guide pillars to slide so as to adjust the roll gap, and the roll bending equipment in any form has the requirement of roll gap adjustment.

The traditional adjusting mode of the roll gap of the existing roll bending forming equipment is that a wrench is used for rotating a nut on a gland, a screw thread pair is used for transmission, an adjusting screw rod vertically moves up and down to change the position of an upper shaft, the position of a lower shaft is unchanged, the size of the roll gap is changed, and then a feeler gauge is used for checking the roll gap. The traditional method has obvious defects that as the number of passes on a complete roll bending production line is more, the roll gap needs to be adjusted for 2n times in n passes. Therefore, the manual adjustment mode has low efficiency, the production speed and the product precision are influenced, and the superposed error is increased along with the accumulation of the adjustment error of each pass, so that the quality of the plate coming out in the last pass is not in accordance with the product requirement. And although the manual adjustment mode has memorial archway scales to check the marks and can also use a feeler gauge for checking, the manual mode has human errors, the adjustment work of an operator in the actual factory environment has obvious randomness, and the accuracy of the roll gap is difficult to ensure. The traditional mode seriously reduces the production speed of products, influences the profits of enterprises and causes the waste of resources.

In order to solve the problems and accelerate the production speed, 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. In order to obtain higher production speed, enterprises need to have a roll bending forming device capable of flexibly adjusting the roll gap, so that the application and development of the adaptive technology have conditions and values. Until now, a considerable amount of prior art has proposed different devices or methods for adaptive adjustment of roll gap to replace the traditional manual adjustment. The methods adopted in the prior art to solve the problems are mainly divided into the following three types:

in the first type, a motor and a cylinder are directly used. For example, in a rolling mill roll gap adjusting device and a rolling mill disclosed in the chinese utility model patent publication No. CN211437476U, the housing windows on both sides are respectively driven by a servo electric cylinder to ascend and descend; for example, the roll gap adjusting device and the roll gap adjusting method disclosed in the chinese patent publication No. CN108787759A, wherein two housings share one motor; for example, a roll gap adjuster of a roll press disclosed in chinese utility model publication No. CN 207669941U and a roll gap adjusting mechanism disclosed in chinese utility model publication No. CN202461124U employ both an air cylinder and a motor.

The technical scheme has the disadvantages that one or two motors are used in each pass, the roll gap adjusting effect is not always in accordance with the theoretical assumption due to the fact that the roll bending equipment is subjected to large forming force generated by a plate during working to generate deflection, 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 causes the structure to be complex, the cost is high, and the popularization is difficult in practical application.

The second category, utilizes some small rigid structure. For example, the roll gap adjusting mechanism disclosed in chinese patent publication No. CN102671954A utilizes an eccentric structure; for example, the chinese patent publication No. CN110328242A discloses an adjusting device and a roll gap adjusting method, which utilize wedges; for example, a cold roll forming machine disclosed in chinese utility model publication No. CN208555569U utilizes a rack.

A disadvantage of this type of solution is that it is difficult to adapt conventional roll bending machines with these small rigid structures, for example by mounting the toothed rack, or leaving room for the wedge, or by remounting the eccentric structure, in a relatively large way.

And the third category, utilizing flexible elements such as springs. For example, the chinese patent publication No. CN110052513B discloses an adaptive upper shaft adjusting device for a cold roll forming machine, which utilizes disc springs of different combinations.

The disadvantage of this type of solution is that the various springs and spring assemblies are often of constant and varying stiffness, which means that their characteristic curves are fixed and cannot be changed once they are of a certain type or combination, i.e. non-adjustable rate springs, whereas the above-mentioned patent uses non-adjustable rate springs, which are difficult to adapt to the forming forces required by the various thicknesses of sheet materials unless the disc spring combination is continuously replaced, or sets of data points of sheet thickness and forming force are difficult to exactly fall on the characteristic curve of the selected spring assembly. Therefore, if the self-adaptive problem of the roll gap is solved by using the spring device with fixed stiffness and variable stiffness, the self-adaptive roll gap is realized only because the flexible surface of the spring per se, but deeper self-adaptive forming force 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 plate which has rebound phenomenon and even goes out from the current pass can impact the next-pass roller and the like; if the stress is larger, the plate can be crushed, and redundant plastic deformation and even cracking can occur.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

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

The purpose of the invention is realized by the following technical scheme:

the roll bending forming equipment auxiliary system capable of automatically adjusting the roll gap comprises a guide-in 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 rolling roll shaft 800 and an upper roll 900;

plate thickness detection devices 1 are respectively arranged between the adjusting screw rods 300 of the two memorial archways of the flat roll pass and the upper bearing box 600;

a roller gap self-adaptive adjusting device 2 is respectively arranged between the adjusting screw rods 300 of the two memorial archways of the forming pass and the upper bearing box 600;

a set of control system 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 the forming of 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 function of the traditional roll bending equipment are not damaged when the roll bending equipment is disassembled and assembled; and has emergency adjustment capability in the event of failure.

Drawings

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

FIG. 2 is a schematic view of a conventional flat roll pass configuration without the present system;

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

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

FIG. 5 is a schematic diagram of a flat roll pass in which a plate thickness detection device according to an embodiment of the present invention is installed;

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

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

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

FIG. 8 is an axial view of the plate thickness detecting device;

FIG. 9a is a front view of a forming pass before installation of the adaptive roll gap adjustment apparatus;

FIG. 9b is a front view of a forming pass without a pressure sensor after the adaptive roll gap adjusting device is installed;

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

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

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

FIG. 12 is a full sectional view of the adaptive roll gap adjustment apparatus with a pressure sensor;

FIG. 13 is a perspective view of the adaptive roll gap adjustment apparatus with pressure sensors;

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

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

FIG. 16 is a composite characteristic curve of two parallel coil springs;

FIG. 17 is a graph showing a comparison of a combination of characteristic curves for two parallel coil springs with a forming force vs. sheet thickness curve;

FIG. 18 is a characteristic diagram of the entire roll gap adaptive adjusting apparatus;

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

FIG. 20a is a schematic diagram of the adaptive roll gap adjustment apparatus before locking;

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

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

In the figure:

the board thickness detection device 1 includes:

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 roll gap self-adaptive adjusting device 2 comprises:

the device comprises a shell 201, a scale threaded 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 limiting long screw 212, a limiting sleeve 213, a locking 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 terminal 303 and a pressure sensor signal acquisition module 304;

the conventional roll bending apparatus includes:

the automatic rolling device comprises a guide 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 window 700, an upper rolling roll shaft 800 and an upper rolling roll 900.

Detailed Description

The technical scheme in the embodiment of the invention is clearly and completely described below by combining the attached drawings in the embodiment of the invention; it is to be understood that the described embodiments are merely exemplary of the invention, and are not intended to limit the invention to the particular forms disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

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

the term "and/or" means that either or both can be achieved, for example, X and/or Y means that both cases include "X" or "Y" as well as three cases including "X and Y".

The terms "comprising," "including," "containing," "having," or other similar terms of meaning should be construed as non-exclusive inclusions. For example: including a feature (e.g., material, component, ingredient, carrier, formulation, material, dimension, part, component, mechanism, device, process, procedure, method, reaction condition, processing condition, parameter, algorithm, signal, data, product, or article of manufacture), is to be construed as including not only the particular feature explicitly listed but also other features not explicitly listed as such which are known in the art.

The term "consisting of … …" is meant to exclude any technical feature elements not explicitly listed. If used in a claim, the term shall render the claim closed except for the inclusion of the technical features that are expressly listed except for the conventional impurities associated therewith. If the term occurs in only one clause of the claims, it is defined only to the elements explicitly recited in that clause, and elements recited in other clauses are not excluded from the overall claims.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured," etc., are to be construed broadly, as for example: can be fixedly connected, can also be detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms herein can be understood by those of ordinary skill in the art as appropriate.

The terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship that is indicated based on the orientation or positional relationship shown in the drawings for ease of description and simplicity of description only, and are not intended to imply or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting herein.

Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art. Those not specifically mentioned in the examples of the present invention were carried out according to the conventional conditions in the art or conditions suggested by the manufacturer. The reagents or instruments used in the examples of the present invention are not specified by manufacturers, and are all conventional products available by commercial purchase.

The invention discloses an auxiliary system of roll bending forming equipment capable of automatically adjusting roll gaps, which comprises a guide-in frame 100, a first pass, a second pass and a subsequent pass, wherein the guide-in frame, the first pass, the second pass and the subsequent pass are sequentially arranged, the first pass is a flat roll pass, the second pass and the subsequent pass are forming passes, 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 window 700, an upper roll shaft 800 and an upper roll 900, and the auxiliary system is characterized in that:

a set of control system 3 is also included.

The board thickness detection device 1 includes: 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 unthreaded holes;

the outer side of the base 103 is provided with two threaded through holes, the middle of the base is provided with two stepped through holes, the center of the base is provided with a boss, and a semi-cylindrical groove is formed in the boss in the vertical direction;

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 screws 102 pass through two unthreaded holes on the outer side of the top plate 101 to be connected with threaded through holes on the outer side of the base 103, and the base fixing screws 107 pass 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 semi-cylindrical groove is formed in the middle of the pressing block 104 in the vertical direction, is matched with the semi-cylindrical 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 threaded 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 limiting long screw 212, a limiting sleeve 213, a locking 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 mounting the pressure sensor fixing screws 219 and a threaded blind hole on the lower surface, the lower layer is of an annular structure, 4 through holes are uniformly arranged on the annular structure 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 2 threaded through holes on the upper layer are connected with the adjusting screw 300 through the adjusting screw fixing screws 400; when the pressure sensor 218 is additionally arranged, the 2 threaded through holes on the upper layer are connected with the adjusting screw rod 300 through the lengthened screw rod fixing screws 217;

the scale threaded column 202 is a stepped threaded column, a thread at the end with a smaller diameter is completely screwed into a threaded 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 a 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 threaded 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 threaded 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, the annular grooves are outwards provided with two stepped through holes, the annular grooves are outwards provided with an annular groove the inner wall of which is provided with internal threads, the outermost side is provided with four threaded blind holes which are uniformly distributed, and the chassis fixing screws 216 penetrate 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 of the electromagnetic spring stator is provided with a wire outlet hole, one end of the electromagnetic spring stator is provided with an external thread, and the external thread end is connected with the internal thread at the lower layer of the shell 201;

the electromagnetic spring rotor 210 is 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, the step is provided with an external thread, and the external thread is connected with the annular groove with the internal thread of the chassis 215;

the electromagnetic spring coil 211 is regularly wound in an annular groove on the outer wall of the electromagnetic spring rotor 210, and two ends of the coil penetrate out of a wire outlet hole 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 penetrate through a through hole of a core part of the electromagnetic spring rotor 210, the outer spring 207 is positioned between the upper pressure plate 203 and the base plate 215, the inner spring 208 is positioned between the lower pressure plate 205 and the base plate 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 ends of the outer spring 207 and the lower end of the inner spring 208 are clamped in an annular groove of the base plate 215;

the limit long screw 212 comprises a polished rod part and a thread part, the limit long screw 212 penetrates through a through hole in the lower layer of the shell 201 and is screwed into a thread blind hole of the chassis 215, the outer diameter of the polished 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 the external thread of the limit long screw 212 and supports the limit sleeve 213.

4 threaded blind holes are uniformly arranged at the bottom of the pressure sensor 218 at intervals of 90 degrees, the pressure sensor is fixed in a reserved stepped threaded 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.

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 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 processed signal to the computer terminal 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 adjusting devices 2 in the same forming pass share one adjustable power supply 302.

In conclusion, the device or the system with the capability of automatically adjusting the roll gap of the roll bending equipment, provided by the embodiment of the invention, can automatically and accurately adjust the roll gap according to different thicknesses and achieve the forming force required by the forming of the plate with the thickness, does not need manual intervention in the working process, and ensures that the plate forming quality is good; the structure and the function of the traditional roll bending equipment are not damaged when the 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 show the technical solutions and the technical effects provided by the present invention, the following detailed description is provided for the embodiments of the present invention with specific embodiments.

Example 1

Firstly, introduction of a whole mechanical structure of a system:

a conventional roll bending apparatus without the system is shown in fig. 1, and takes a six-pass apparatus as an example, the roll bending apparatus has an uncoiler in front of a pedestal, a material coil on the uncoiler is drawn out of an end and then passes through a guide frame 100, and the guide frame has a plate guiding function to feed the plate into the first pass. The first pass of the roll bending equipment is a flat roll pass, and the second pass and the subsequent passes are forming passes. The first pass is used for flattening the plate and ensures that the plate has enough forward power to be bitten by the forming pass of the second pass, so that the plate is formed by the forming passes of the second pass.

The first flat roll pass without the system is schematically shown in fig. 2, and the second pass without the system and the subsequent forming pass are schematically shown in fig. 3, taking the second pass as an example. The traditional roll bending pass structure mainly comprises 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 other key components.

The invention relates to a plate thickness adaptive roll forming auxiliary system, which comprises three main parts, namely a plate thickness detection device 1, a roll gap adaptive adjusting device 2 and a control system 3. In a roll bending equipment production line provided with the system, 2 plate thickness detection devices are used in total and are arranged between an adjusting screw rod 300 and an upper bearing box 600 in a memorial archway 700 of a first pass, namely a flat roll pass, and one memorial archway 700 at two sides; the roll gap self-adaptive adjusting devices are 2n in total, are arranged between the adjusting screw rods 300 in the memorial archways 700 at the two sides of a forming pass and the upper bearing box 600, and are respectively arranged in the memorial archways 700 at the two sides, wherein n refers to the forming pass frequency after the flat roll pass. Taking a six-pass roll bending forming apparatus as an example, since the first pass is a flat roll pass and the last five passes are forming passes, 2 plate thickness detection devices 1, 10 roll gap

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 production line of the roll bending equipment is shown in fig. 4, the schematic diagram of the flat roll pass installed with the plate thickness detection device 1 is shown in fig. 5, and the schematic diagram of the forming pass installed with the roll gap adaptive adjusting device 2 is shown in fig. 6.

Structure introduction of plate thickness detection device

The plate thickness detection device 1 is a pilot device of the whole auxiliary system, a detected plate thickness signal needs to be rapidly transmitted to the control system 3, the control system 3 judges that a certain amount of current is supplied to the roll gap adaptive adjusting 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 adaptive adjusting device 2. Fig. 7a and 7b show the plate thickness detection device 1 mounted before and after the flat roll pass.

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 board thickness detection device 1 is shown in fig. 8, and a specific configuration thereof will be described below.

Introduction of specific parts:

top plate 101: the top plate 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 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 is threaded with the base 103 through two unthreaded holes on the outer side of the top plate 101, the diameter of the unthreaded hole is larger than the diameter of the polished rod part of the long screw 102, and the polished rod part of the long screw 102 can axially slide in the unthreaded hole of the top plate 101.

Long screws 102: the end of the long screw 102 has a threaded section for screwing into a threaded through hole of the base 103. The long screw 102 has a stem section with a diameter smaller than the unthreaded bore diameter of the top plate 101 and is axially movable therein.

The base 103: the base 103 has two threaded through holes on its outside for the insertion of the long screws 102. Two stepped through holes are formed in the middle for screwing the base fixing screws 107 to connect the base 103 with the upper bearing housing 600. The center of the displacement sensor is provided with a boss, and a semi-cylindrical groove is formed in the boss in the vertical direction and used for being matched with the pressing block 104 to clamp the displacement sensor 105 together.

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

The 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, and the reset function is used for detecting axial displacement and outputting a displacement electric signal. The displacement sensor 105 has an amplifier integrated therein, which is a part of the displacement sensor 105.

Press block fixing screw 106: the pressing block 104 is screwed into the threaded hole of the boss of the base 103 after passing through the stepped through hole of the pressing block 104, so that the pressing block 104 is fixed on the boss of the base 103.

Base fixing screw 107: for fixing the base 103 to the upper surface of the upper bearing housing 600.

Thirdly, introducing a partial structure of the self-adaptive device:

the roll gap self-adaptive adjusting device 2 is the most important component in the auxiliary system and is a key structure for realizing the thickness self-adaptive forming function. The part can select whether to add the pressure sensor 218 according to actual needs. The roll gap adjusting apparatus 2 is mounted before and after the forming pass, and a comparison of the case where the pressure sensor 218 is mounted or not is shown in fig. 9a and 9b, and fig. 9b and 9 c.

The specific structure of the roll gap adaptive adjusting device 2 in the state without the pressure sensor 218 includes: the device comprises a shell 201, a scale threaded 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 mover 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. Fig. 10 is a full sectional view of the adaptive roll gap adjusting device 2, and fig. 11 is an axial view of the adaptive roll gap adjusting device 2, and the specific structure thereof will be described below.

Introduction of specific parts:

the shell 201: the structure is double-layer, and four ribbed slabs are arranged between 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 on the upper periphery of the annular at intervals of 90 degrees and used for penetrating through the limiting long screws 212. The lower ring is threaded on the inside for mating with threads on the outside of the electromagnetic spring stator 209.

Scale threaded post 202: is a stepped threaded column, and one end with a thinner diameter is completely screwed into the middle threaded blind hole on the lower surface of the upper layer of the shell 201. The end with the thicker diameter is used for being in threaded connection with the upper pressing plate 203 and the lower pressing plate 205, the side surface of the end with the thicker diameter is provided with a scale for indicating the positions of the upper pressing plate 203 and the lower pressing plate 205, and the tail end of the thread is provided with a circular boss.

Upper platen 203: fixed outside the scale threaded column 202 through threaded connection, the upper pressure plate 203 is internally provided with a stepped groove for embedding an upper thrust bearing 204.

Upper thrust bearing 204: and is inserted into the stepped groove of the upper platen 203, so that when the upper platen 203 rotates for a certain distance and then contacts the outer spring 207, friction between the upper platen 203 and the outer spring 207 can be eliminated.

Lower platen 205: the lower pressure plate 205 is fixed outside the scale threaded column 202 through threaded connection and is positioned below the upper pressure plate 203, and a stepped groove is formed in the lower pressure plate 205 and can be embedded into the lower thrust bearing 206.

Lower thrust bearing 206: and is inserted into the stepped groove of the lower pressure plate 205, so that when the lower pressure plate 205 rotates for a certain stroke and then contacts the inner spring 208, the 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, the upper and lower surfaces are flat surfaces, and the bottom is clamped in an outer annular groove of the chassis 215.

The inner spring 208: between the lower platen 205 and the bottom plate 215, the upper and lower surfaces are flat surfaces, and the bottom is clamped in an inner annular groove of the bottom plate 215.

Electromagnetic spring stator 209: the tubular structure, inside has annular tooth, and one side tip has the external screw thread for with the internal thread connection of shell 201. And the outer side of the electromagnetic spring coil 211 is provided with a wire outlet hole for connecting with the adjustable power supply 302 through two ends of the electromagnetic spring coil 211.

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

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

Limiting long screw 212: the limiting long screws 212 are threaded into threaded holes of the chassis 215 after penetrating through four through holes of the shell 201, and the polished rod part has an outer diameter smaller than the diameter of the shell and can vertically move in the holes.

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

The lock nut 214: screwed on the external thread of the limit long screw 212, the four locking nuts 214 are at the same height, support the limit sleeve 213 and play a limit role.

The chassis 215: the central portion has two annular grooves for catching the bottoms of the outer spring 207 and the inner spring 208. Two stepped through holes are formed outwardly for passing chassis fixing screws 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. And four threaded blind holes are uniformly distributed on the outermost side and are used for being in threaded connection with the limit long screw 212.

Chassis set screw 216: for fixing the base plate 215 to the upper surface of the upper bearing housing 600.

The contrast between the state of the adaptive roll gap adjusting device 2 with the pressure sensor 218 attached and the state of the adaptive roll gap adjusting device without the pressure sensor 218 is that 2 conventional adjusting screw fixing screws 400 are replaced by 2 elongated screw fixing screws 217, and the pressure sensor 218 and the pressure sensor fixing screw 219 are added. Fig. 12 is a full sectional view of the adaptive roll gap adjusting apparatus 2 with the pressure sensor 218 attached thereto, and fig. 13 is an axial view thereof.

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

Elongated screw set screw 217: the adjusting screw 300 is fixed when the adjusting screw is specially used for a state of being provided with the pressure sensor 218, compared with the traditional adjusting screw 400, the end part of the adjusting screw is provided with threads and can be screwed into a threaded through hole on the shell 201, the outer diameter of the polished rod part of the lengthened 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.

The pressure sensor 218: the bottom of the pressure sensor 218 is uniformly provided with 4 threaded blind holes at intervals of 90 degrees, the threaded blind holes are fixed on the shell 201 through pressure sensor fixing screws 219, a measuring pressure head at the top is abutted to the bottom surface of the adjusting screw rod 300, the pressure sensor 218 is connected with a wire harness port and a pressure sensor signal acquisition module 304, and the acquisition module can display data on data visualization software of a computer terminal 303, so that an operator can observe the stress condition in real time.

Pressure sensor fixing screw 219: the pressure sensor 218 is fixed to the upper surface of the housing 201 by being screwed into the screw hole of the pressure sensor 218 after passing through the four stepped screw through holes of the housing 201.

Fourth, the working principle

1. Operation principle of plate thickness detection device

Although the operator can know the thickness value of each plate material by caliper measurement, the roll gap adaptive adjusting device 2 in the auxiliary system needs to receive the thickness data signal measured by the thickness detecting device 1 as an operation basis, and therefore the thickness detecting device 1 is required as a pilot device of the roll gap adaptive adjusting device 2.

The plate thickness detection device 1 is installed between the adjusting screw 300 and the upper bearing box 600 in the flat roll pass, and 1 of the housing windows 700 on both sides are symmetrically installed, as shown in fig. 5. In the initial state, the upper and lower flat rolls of the flat roll pass just touch each other, and the measurement head of the displacement sensor 105 in the plate thickness detection apparatus 1 just touches the lower surface of the top plate 101 in the apparatus, as shown in fig. 7 b. When no sheet material passes through the flat rolls, that is, when the plate thickness detection device 1 does not operate, 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 plate thickness detection devices 1 on both sides. Since the outer diameter of the rod portion of the long screw 102 is smaller than the bore diameter of the top plate 101, the long screw 102 can slide vertically in the top plate 101. When the plate material enters between the flat rolls from the leading-in frame 100, because the plate material has a certain thickness, the upper flat roll shaft and the upper bearing box 600 are simultaneously jacked up by the plate material, because the plate thickness detection device 1 is fixed on the upper surface of the upper bearing box 600, the base 103, the long screw 102, the press block 104, the displacement sensor 105 and the press block fixing screw 106 of the plate thickness detection device 1 simultaneously move upwards, and the top plate 101 of the device is fixed on the adjusting screw 300 and does not move, so the measuring head of the displacement sensor 105 is compressed by the top plate 101 to measure the ascending displacement value of the plate thickness detection device 1, the displacement value and the plate thickness value are in one-to-one correspondence, thereby completing the plate thickness detection work before the plate material enters the next forming pass, and transmitting a plate thickness signal to the control system 3, receiving and judging through the control system 3 and transmitting signals to the adjustable power supplies 302 of all the forming passes, therefore, the adjustable power supply 302 of each forming pass inputs a proper current to the corresponding roll gap self-adaptive adjusting device 2, so that the roll gap self-adaptive adjusting device 2 of each forming pass obtains a proper current before the plate enters the pass, and the plate is ensured to give a proper forming force after entering.

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 adjusting device 2, and before the working principle of the self-adaptive device is introduced, the working principle of an electromagnetic spring, which is a core component, needs to be explained first.

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 structure type electromagnetic spring, which is hereinafter referred to as a tooth-shaped electromagnetic spring. The tooth-shaped electromagnetic spring mainly structurally comprises a stator, a rotor and an electromagnetic coil.

When the electromagnetic spring works, 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 after the excitation coil is electrified. When the mover is axially displaced relative to the stator, the air-gap magnetic circuit is shifted due to the staggered teeth, so that an electromagnetic force trying to restore the teeth of the mover to the original position, that is, to eliminate the relative displacement, is generated in the axial direction, and during the continuous axial movement of the mover, the electromagnetic force exhibits a characteristic similar to a sine curve, and a schematic diagram of a variation curve of the electromagnetic force with the axial displacement of the mover within one period is shown in fig. 14, where a vertical coordinate F indicates the electromagnetic force of the electromagnetic spring, and X indicates the axial displacement of the mover. The electromagnetic force is approximately linear with displacement over 1/4 cycles of axial displacement of the mover. This characteristic is similar to a mechanical spring and is referred to as an electromagnetic spring. The electromagnetic stiffness can be changed by changing the magnitude of the direct current led into the electromagnetic spring coil 211, so that the purpose of adjustable stiffness is achieved. In the 1/4 period of the characteristic curve, when the current is changed only without changing other factors such as control displacement, the electromagnetic force increases with the increase of the current, as shown in fig. 15, where I1 < I2 < I3 < I4 < I5, where 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 portion of 1/4 cycles of the electromagnetic spring characteristic is the portion of the roll gap adjustment apparatus that needs to be used.

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

The roll gap adjusting device 2 is installed between the bottom surface of the adjusting screw 300 and the upper surface of the upper cage 600 in the forming pass from the second pass, as shown in fig. 6.

In the initial state, the upper roll and the lower roll 900 in the forming pass in which the roll gap adaptive adjusting device 2 is installed are in contact with each other, and when no plate passes through the roll gap, that is, when the roll gap adaptive adjusting device 2 does not work, the total weight of the upper roll, the upper roll shaft 800 and the upper bearing box 600 is borne by 8 limit long screws 212 in the roll gap adaptive adjusting devices 2 on both sides. Since the outer diameter of the polished rod portion of the stopper long screw 212 is smaller than the aperture of the through hole of the housing 201, the stopper long screw 212 can slide vertically in the through hole of the housing 201.

After the plate material is bitten by the forming roller, the plate material can jack the upper roller 900 due to certain thickness, the roller is strung on the roller shaft, the roller shaft is inserted into the left bearing box and the right bearing box, so the roller shaft and the two bearing boxes are finally jacked together, and the chassis 215 of the self-adaptive roller gap adjusting device 2 is fixed on the upper surface of the upper bearing box 600, so the chassis 215 of the self-adaptive roller gap adjusting device 2 can be simultaneously jacked upwards, and then the upper roller 900, the upper bearing box 600 and the upper roller shaft 800 are jacked up to a certain height together, so that the self-adaptive device is compressed to generate spring force. What needs to be determined is therefore the relationship between the sheet thickness and the height to which the roll is lifted. Since the upper roll 900, the upper bearing housing 600, and the upper roll shaft 800 are lifted up when the upper roll 900 and the lower roll are in contact with each other in the initial state and the plate material is inserted between the rolls in contact with each other, since the lower roll is fixed, the plate thickness value uniquely corresponds to the upper roll lifting amount of each pass when the plate material section is fixed and the plate material is normally formed, and since the adaptive device is installed between the bottom surface of the adjusting screw 300 and the upper surface of the upper bearing housing 600, the upper roll lifting amount of each pass is equal to the compressed amount of the roll gap adaptive adjusting device 2, the plate thickness value uniquely corresponds to the compressed amount of the roll gap adaptive adjusting device 2, that is, if the plate material having a certain thickness is inserted between the adjusting screw 300 and the upper bearing housing 600 and displaced in the opposite direction, the thickness is converted into the compressed amount of the adaptive device 2. If the sheet thickness values are t1, t2, t3, and t... and tn, the compressed amount of the corresponding roll gap adaptive adjusting device 2 is X1, X2, X3, and t... and Xn, respectively, wherein the sheet thickness values of the same subscripts uniquely correspond to the compressed amount of the roll gap adaptive adjusting device 2.

The above-mentioned toothed electromagnetic spring is a part of the adaptive device, and its principle has been described. The adaptive device not only comprises an electromagnetic spring, but also comprises two traditional spiral springs connected in parallel with the electromagnetic spring, wherein the spiral springs have linear stiffness and are called an inner spring 208 and an outer spring 207 according to the orientation, the stiffness of the inner spring 208 is marked as k1, the stiffness of the outer spring 207 is marked as k2, and the two traditional spiral springs are different in height. There is a corresponding pressure plate above each spring, the lower surface of the pressure plate corresponding to the inner spring 208 just contacts the upper surface of the inner spring 208, and the lower surface of the pressure plate corresponding to the outer spring 207 has an adjustable distance, denoted as d, from the upper surface of the outer spring 207. If the action of the electromagnetic spring is not considered for the moment, the characteristic curves of the two parallel coil springs when compressed are shown in fig. 16, where F is the spring force and X is the compressed displacement of the spring. The characteristic curve is a two-section broken line, the turning time can be manually controlled well in advance by changing the value of d, namely, the distance d between the upper pressing disc 203 and the outer spring 207 is adjusted by rotating the upper pressing disc 203, and the adjustment amount can be compared with the scale on the scale threaded column 202.

As can be seen from fig. 16, the characteristic curve of the two parallel coil springs under compression is a two-step broken line, since the distance d exists between the outer spring 207 and the corresponding platen in the two parallel coil springs, and the inner spring 208 is in the initial state, i.e. just in contact with the corresponding platen, the slope of the first step of the characteristic curve is the stiffness k1 of the inner spring 208 from the origin, after the compression displacement passes through the distance d, the outer spring 207 is in contact with the corresponding platen, and the two springs start to act simultaneously, so the characteristic curve is turned when the displacement reaches d, and the slope of the second step is the sum of the stiffnesses of the inner spring 208 and the outer spring 207, i.e. k1+ k 2.

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

It can be known from fig. 17 that, only by the two parallel coil springs, there is a certain difference between the combined spring force and the forming force, so that the tooth-shaped electromagnetic spring with adjustable rigidity, i.e. adjustable spring force, in the adaptive device is considered to be connected in parallel with the coil springs, and the difference between the spring force and the forming force can be compensated by selecting a proper current to achieve a proper electromagnetic spring force, so that the whole adaptive device achieves the required forming force, i.e. the integral characteristic curve of the adaptive device intersects with the forming force curve at a proper position. As can be seen from fig. 17, although the forming force curve increases exponentially with the increase in the sheet thickness, since the characteristic curves of the two parallel coil springs are closer to the trend of the forming force curve, the difference between the forming force curve and the characteristic curve of the combination of the coil springs does not increase significantly with the increase in the displacement, and therefore the work load of the electromagnetic spring is stabilized within an approximate range without increasing with the increase in the sheet thickness, and assuming that the maximum difference force between the forming force curve and the characteristic curve of the combination of the coil springs is Δ f N, the difference between the forming force and the characteristic curve is always maintained within the range of (0 to Δ f) N. Therefore, through the parallel connection of the two spiral springs and the electromagnetic spring, the two traditional spiral springs of the outer spring and the inner spring bear most of the forming force of the plate, and therefore the design requirement and the work load of the electromagnetic spring are reduced. After considering the action of the electromagnetic spring based on two conventional coil springs, the characteristic curve of the whole roll gap adaptive adjusting device will be changed as shown in fig. 18, where F is the total spring force of the adaptive adjusting device, and X is the compression displacement of the adaptive adjusting device. The whole adaptive device is a parallel spiral spring and then an electromagnetic spring, so that the characteristic curve graph of the adaptive device is equivalent to the sum of the 1/4 period characteristic curve of the electromagnetic spring under a certain proper current in fig. 15 and the characteristic curves of the two parallel spiral springs in fig. 16. Therefore, the first section of the characteristic curve of the roll gap adaptive adjusting device in fig. 18 is the effect of the combined action of the inner spiral spring and the electromagnetic spring, and the second section is the effect of the combined action of the outer spiral spring, the inner spiral spring and the electromagnetic spring. Since the relationship of the electromagnetic spring force to the displacement of the mover is not linear, the characteristic curve of the entire device is not linear.

For example, a certain thickness tn plate will jack up the upper roller Xn in the normal forming process, i.e. the compression displacement of the roller gap adaptive adjusting device 2 is Xn, and the forming force required when the thickness plate is formed well is set as Fn, simulation shows that when the electromagnetic spring coil 211 in the electromagnetic spring is supplied with current with the magnitude of in, the intersection point of the characteristic curve of the whole adaptive device and the forming force curve is just (Xn, Fn), i.e., the characteristic curve of the entire adaptive device passes through (Xn, Fn), as shown in fig. 19, where F is the total spring force of the adaptive device, X is the compression displacement of the adaptive device, therefore, an operator can obtain the most appropriate electromagnetic spring current size when the plates with different thicknesses are formed 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 to be used as the basis for the control system to identify, judge and control the adjustable power supply.

The self-adaptive roll gap adjusting device 2 has two working states of locking and unlocking for an operator to select according to actual needs so as to be suitable for different working conditions. Taking the roll gap adjusting apparatus 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 housings 600 on both sides is recorded as G, regardless of the friction force between the upper bearing housing 600 and the inner wall of the housing 700 when moving in the vertical direction and the self-weight of the roll gap adaptive adjusting apparatus 2. When a certain distance is left between the upper surface of the limiting sleeve 213 and the lower surface of the housing 201, the state is unlocked, as shown in fig. 20 a; when the operator rotates the locking nut 214 upwards, the upper surface of the limiting sleeve 213 is pushed against the bottom of the housing 201 and then the locking nut 214 is tightened, as shown in fig. 20 b. Specific applications of both states are discussed in detail below. When the device is in a non-locking state, the device has a roll gap self-adaptive adjusting function, when the device is in a locking state, the device does not have the roll gap self-adaptive adjusting function any more, the roll gap can be adjusted only by using the traditional rotary adjusting nut 500, and under certain occasions, the quick switching between the two states has important significance.

Unlocked state application: when the system needs to form a plate with the required forming force F being more than or equal to G, the system belongs to the normal working state of the device, and most working conditions belong to the state. An operator can adjust the distance between the upper surface of the limiting sleeve 213 and the lower surface of the shell 201 by rotating the locking nut 214, and the reserved distance is the maximum compressible distance of the roll gap self-adaptive adjusting device 2, so that the device has a safety limiting function and prevents the roll gap self-adaptive adjusting device 2 from being damaged in the forming process of an over-thick plate.

Locked state application: in a first application situation, when the system needs to form a plate with the required forming force F less than the total weight G, it indicates that the total weight G can press the plate to be formed, and even crush the plate, so when the plate with the required forming force F less than G needs to be processed, the adaptive device needs to be locked, the adaptive adjusting function is suspended, and the traditional roll gap adjusting function of adjusting the nut 500 by turning a wrench is recovered; in the second suitable situation, some links of the auxiliary system fail to work continuously, and the auxiliary system needs to be locked when only the traditional roll gap adjusting function is used for forming, and the locking nut 214 can be lowered after the system is repaired to recover the roll gap self-adaptive adjusting function.

4. Composition and working principle of control system

The auxiliary system comprises a plate thickness detection device 1 and a roll gap adaptive adjusting device 2, and also comprises a set of control system 3. The structure of the control system 3 is schematically shown in fig. 21, and includes a controller 301, an adjustable power supply 302, a computer terminal 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 adjusting device 2, where it is assumed that the pressure sensor 218 is installed in each roll gap adjusting 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 descriptions of the structures of the plate thickness detecting device 1 and the roll gap adaptive adjusting device 2, respectively, and are not described in detail herein.

The controller 301: the controller 301 is a core of the entire control system 3, and in order to control the adjustable power supplies 302, a plurality of analog output expansion modules are additionally installed on 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.

The adjustable power supply 302: the adjustable power supply 302 is provided with an interface that can be controlled by a dc analog voltage signal and can be controlled by the controller 301 to output a voltage or current of a suitable magnitude. The number of the adjustable power sources 302 is equal to the number of forming passes, that is, two roll gap adaptive adjusting devices 2 in the same forming pass share one adjustable power source 302.

The computer terminal 303: two types of software are installed in the computer terminal 303. The first is a special driving unit matched with the controller 301, the controller 301 can be programmed in the software, and an operator can set a monitoring window for collecting numerical values by 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, monitoring software which can be matched with the pressure sensor 218 is convenient for an operator to 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 raw signal acquired by the pressure sensor 218 to serve as a relay between the pressure sensor 218 and the computer 303.

The control system has the following connection mode, including a working path and a monitoring path:

the working path is connected: the two displacement sensors 105 of the first pass, namely the flat roll pass, are connected to a controller 301, the controller 301 is connected with a plurality of adjustable power sources 302, the number of the adjustable power sources 302 is equal to the number of the forming passes from the second pass, one adjustable power source 302 of each forming pass is simultaneously connected with the two roll gap self-adaptive adjusting devices 2 of the pass, and power is supplied to the electromagnetic spring coils 211 in the roll gap self-adaptive adjusting devices 2. The above is a work path connection mode for realizing the system function. As shown by the bold solid curve in fig. 21.

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

The working principle of the control system is as follows:

firstly, a plate enters 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 obtains 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 displacement value Xn preset in the controller 301 and a current value in of each pass is combined for 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 roller gap adaptive adjusting devices 2 of each forming pass before the plate enters a forming pass from a second pass, the current supplied to the two roller gap adaptive adjusting devices 2 of the same pass is the same, and the current supplied to the two roller gap adaptive adjusting devices 2 of different passes are basically different in magnitude, therefore, the plate is ensured to be subjected to proper forming force after entering each forming pass, so that the plate is completely formed in each forming pass, and the plate with excellent quality is finally processed. When an operator needs to monitor the thickness of the plate being processed in real time, the controller 301 transmits a displacement signal to a visualization window of a special driving unit of the controller 301 of the computer terminal 303, and the thickness detected by the displacement sensor 105 is displayed in real time to know the working condition of the equipment.

When an operator needs to monitor the magnitude of the forming force of the plate in each pass in real time, signals of two pressure sensors 218 of a certain pass are transmitted to the pressure sensor signal acquisition module 304 and then transmitted to monitoring software used with the pressure sensors 218 of the computer terminal 303, so that the detection curves of the two sensors are displayed in a display frame in the same pass, because the plate needs a larger forming force during forming, before the pressure sensors 218 are subjected to pressure, the plate already jacks up the upper roller 900, the upper roller shaft 800 and the upper bearing box 600, the total weight is G, and the total weight G is also a part for assisting plate forming, therefore, during post-processing of the detection data of the pressure sensors 218, the measurement values f1 and f2 of the pressure sensors 218 on both sides of the same pass need to be added with the total weight G of the upper roller 900, the upper roller shaft 800 and the upper bearing box 600 of the pass, and the sum of f1, f2 and G is the forming force of the plate of the pass, therefore, through simple calculation, an operator can monitor the forming force applied to the plate in each pass of plate forming and record data, so that the forming force of each pass can be adjusted according to the forming quality of the plate.

An operator can monitor the thickness of the plate being formed at the moment of the roll bending equipment through a visual window of a special driving unit of the controller 301 at the computer end 303, and can detect the forming force of the plate through monitoring software of the pressure sensor 218, so that the two steps can be carried out simultaneously without mutual interference, and the operator can conveniently know the equipment condition in real time.

Fifthly, the effects and advantages created by the invention

1. The system not only utilizes the elasticity of the elastic body to solve the surface problem of roll gap self-adaptation, but also utilizes the characteristic of flexible and adjustable rigidity of the tooth-shaped electromagnetic spring to solve the essential problem of deeper self-adaptation of forming force, thereby achieving the real plate thickness self-adaptation. The operator sets corresponding relations between various plate thicknesses and current passing through the tooth-shaped electromagnetic spring in the control system in advance, so that the system can meet the forming requirements of plates with any thickness in the working range, accurately achieve the required forming force, namely have the capability of steplessly adapting to the plates with any plate thickness with the forming force F larger than the total weight G, and have no upper limit of the number of plate thicknesses in the working range. When a new plate thickness occurs, the plate thickness and the current of the electromagnetic spring coil 211 required by the plate thickness can be added in the program, and the system can automatically adapt and adjust 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 adjusting 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 adjusting device 2 which are structurally independent and can carry out signal communication, wherein the design, the arrangement and the modification of the plate thickness detection device 1 can not cause any influence on the structure of the roll gap self-adaptive adjusting 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 is particularly characterized in that the plate thickness detection device 1 is arranged between the adjusting screw rod 300 and the upper bearing box 600 in the flat roll pass, the roll gap self-adaptive adjusting device 2 is arranged between the adjusting screw rod 300 and the upper bearing box 600 in the forming pass, and the original state of the traditional roll bending forming equipment can be recovered after the two devices are disassembled.

4. If the working condition changes greatly, when an operator needs to adjust the turning point of the combined characteristic curve 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 adjusted by manual rotation, and the operator can know the relative position between the springs and the pressure plates visually through the scale design on the scale thread column 202, so that the operation is visual and convenient.

5. According to whether the locking nut 214 of the roll gap self-adaptive adjusting device 2 is locked or not, two adjusting modes can be selected: the roll gap is adjusted manually and adaptively in the traditional method; depending on whether the pressure sensor 218 is installed or not, there are two measurement states that can be selected: the forming force monitoring function is available, the forming force monitoring function is unavailable, the test and scientific research experiment can be carried out under the state that the pressure sensor 218 is installed, the cost and the occupied space are saved under the state that the pressure sensor 218 is not installed, and the forming force monitoring device can be used for long-term practical engineering application of enterprises. And the two regulation modes and the two measurement states can be matched randomly, namely the regulation modes and the two measurement states together comprise: the forming force monitoring system has the advantages that the traditional manual roll gap adjusting mode with the forming force monitoring function, the traditional manual roll gap adjusting mode without the forming force monitoring function, the self-adaptive roll gap adjusting mode with the forming force monitoring function and the self-adaptive roll gap adjusting mode without the forming force monitoring function are selectable in four modes, and the forming force monitoring system can be used for different working condition requirements and is flexible and changeable.

6. The self-adaptive roll gap adjusting device has a safety limiting function and an invalid emergency protection function, and particularly through the design of the locking nut 214 matched with the limiting long screw 212 and the limiting sleeve 213, 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 pressure capacity of the adjusting device is adjusted, and the device is prevented from being damaged by a large amount of overpressure due to the fact that an excessively thick plate is mistakenly inserted. If the device fails, an operator can completely lock the locking nut 214, namely, the limiting sleeve 213 abuts against the lower surface of the shell 201 to achieve the effect of complete locking, 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 roll bending equipment continues to work, so that the production progress is not delayed. Namely, 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, hydraulic pressure and the like are not used, the spring with adjustable rigidity is connected with a traditional spring in parallel, parts or materials needing special process machining are not used, and the system is simple in structure, convenient to machine and low in cost.

Sixthly, the working process of the specific embodiment is as follows:

1. preparation work:

step 1, assembling and installing the plate thickness detection device 1: an operator finishes assembling 2 plate thickness detection devices 1, ensures that a measuring head of a displacement sensor 105 is just in contact with the lower surface of a top plate 101 in the plate thickness detection device 1, then installs the plate thickness detection device 1 into memorial archways 700 on two sides of a first pass, namely between an adjusting screw rod 300 and an upper bearing box 600 of a flat roller pass, then uses a wrench to rotate adjusting nuts 500 on two sides, ensures that upper and lower flat rollers of the flat roller pass are just in contact, and then leaves a wire harness end of the displacement sensor 105 in the plate thickness detection device 1 for standby.

Step 2, assembling and installing the roll gap self-adaptive adjusting device 2: an operator calculates the approximate forming force required by the plates with various thicknesses required to be used according to a roll bending forming force calculation formula in the research literature of force energy parameters in the related roll bending forming field, obtains a relation curve of the forming force and the 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 combination characteristic curve of the inner spring and the outer spring is below the forming force curve and the increasing trend is basically consistent, as shown in fig. 17, supposing that the pressure sensor 218 is 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 housing windows 700 at the two sides of the second pass and all the subsequent forming passes, namely, the adjusting screw rod 300 of the forming pass is arranged between the upper bearing box 600, and then, a spanner is used for rotating the adjusting nuts 500 at two sides to ensure that the upper and lower forming rollers in the forming pass are just contacted, and then the wire harness ends of the electromagnetic spring coil 211 and the pressure sensor 218 in the roller gap self-adaptive adjusting device 2 are reserved for standby.

Step 3, connecting a control system: after the working path and the monitoring path of the control system 3 are connected, the horizontal of the flat roll shaft is ensured by comparing the numerical values of the displacement sensors 105 on the two sides of the flat roll pass displayed by the computer terminal 303, and the situation that the bearing boxes on the two sides of the flat roll pass are high or low is avoided. And then the numerical value of the pressure sensors 218 on the two sides of each forming pass displayed by the computer terminal 303 is compared, so that the level of the forming roll shaft is ensured, and the situation that the bearing boxes on the two sides of each forming pass are higher or lower is avoided.

Step 4, pretesting: before the adaptive forming of the plate material is carried out by using the plate thickness adaptive roll bending forming auxiliary system in official form, the magnitude of the optimal forming force F required by the plate material with each thickness t needs to be obtained. The lock nut 214 is first tightened, and the roll gap self-adaptive adjusting device 2 does not have the ability to adaptively adjust the roll gap, so that the roll bending apparatus is returned to the conventional mode, i.e., the mode of adjusting the roll gap by turning the adjusting nut 500 with a wrench, but the pressure sensor 218 can still function, i.e., the forming force applied during the sheet forming process can still be measured. The adjusting nut 500 of each pass is turned by a spanner according to the plate thickness of the test plate used for the pretest, so that the roll gap value of each pass is adjusted to the optimal roll gap size required by the forming of the plate with the thickness, the gap gauge is used for checking, and the pretest of the first plate thickness can be carried out after the checking is finished. And (3) roll-bending and forming the plates with each thickness t to be tested one by one, and recording the forming force F required by the plates with the thickness in each pass of forming. And manually adjusting the roll gap of each pass again until the roll gap is suitable for the next thickness of plate, and then testing the forming force F required by the next thickness of plate. After the pre-test is completed, the operator can obtain a database of each thickness t of the sheet material and the optimum forming force F required for forming the sheet material in each pass. According to the corresponding relation between the plate thickness and the ascending amount of the upper roller 900, and the ascending amount of the upper roller 900 is equal to the compressed amount of the adaptive device, the operator can finally obtain the relation between the compressed amount X of the adaptive device and the required forming force, namely the spring force F.

Step 5, data processing and current size determination: after obtaining the relationship between the compressed amount X of the adaptive device and the required forming force, namely the spring force F, an operator determines the electromagnetic spring force required by each thickness of plate material during each pass of forming according to the difference between the forming force curve and the spiral spring combination characteristic curve, thereby obtaining the coil current i required by each plate thickness t of plate material to be led into the electromagnetic spring coil 211 during each pass of forming. After the corresponding relation between the plate thickness t and the current i is input into the control system, and the plate thickness is detected by the plate thickness detection device 1 and transmitted to the control system 3, the control system 3 can quickly respond, and corresponding current is introduced into the electromagnetic spring coil 211 in the self-adaptive device of each pass before the plate enters the forming pass. The locking state of the locking nut 214 is released and the device is restored to the self-adaptive working state. So far, the preparation work of the whole system is finished, and the system can be put into the self-adaptive roll bending forming work.

2. And (3) normal use:

step 1, processing a plate with forming force F being more than or equal to G: the locking state of the locking nut 214 is released, and after the plate is drawn out from one end of the uncoiler and enters a flat roll pass, the plate thickness detecting device 1 detects the plate thickness t, and after the plate thickness signal is transmitted to the control system 3, the control system 3 quickly determines the magnitude of the current corresponding to the required electromagnetic spring coil 211 and sends the signal to the variable power supply 302, the adjustable power supply 302 supplies the required current to the self-adaptive device of each pass, so as to ensure that the pressure applied to the plate after the plate enters the forming pass and jacks the upper roller 900 is just the required forming force, therefore, after the forming is successfully carried out in the pass, the pressure applied to the upper roller 900 after the next forming pass is just the required forming force, therefore, the steel is smoothly formed in the pass, the subsequent passes are analogized, and finally the steel is obtained from the last pass and is cut by hydraulic pressure to form the cold-formed steel product with qualified forming quality.

Step 2, processing the plate with the forming force F less than G: since some thinner sheet materials require a forming force smaller than G, the sheet materials can be formed or even fractured by only the self weight G of the upper roll 900, the upper roll shaft 800 and the upper bearing box 600, so that there is no need to use an adaptive adjusting device, the self-adaptive adjusting function is turned off by locking the lock nut 214, and the roll bending apparatus is returned to a manual roll gap adjusting mode, and the operator adjusts the roll gap of each pass by turning the adjusting nut 500 of each pass in turn using a conventional manner, and then the sheet materials enter from the first pass and complete the forming. Finally, the cold-formed steel is cut off by hydraulic shear to form a cold-formed steel product with qualified forming quality from the last step.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Claims

1. The utility model provides an automatic roll bending former auxiliary system of adjustment roll gap, roll bending equipment is including leading-in frame (100), first pass, second pass and the follow-up pass that arranges in proper order, first pass is the plain-barreled pass, second pass and follow-up pass are the formation pass, first pass, second pass and follow-up pass include gland (200), adjusting screw (300), adjusting screw fixing screw (400), adjusting nut (500), upper bearing box (600), memorial archway (700), last roll axle (800), last roll (900) respectively, its characterized in that:

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

a roller gap self-adaptive adjusting device (2) is respectively arranged between the adjusting screw rods (300) of the two memorial archways of the forming pass and the upper bearing box (600);

also comprises a set of control system (3).

2. A roll forming apparatus auxiliary system that automatically adjusts a roll gap according to claim 1, wherein the sheet thickness detection device (1) includes: the device 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 unthreaded holes;

the outer side of the base (103) is provided with two threaded through holes, the middle of the base is provided with two stepped through holes, the center of the base is provided with a boss, and a semi-cylindrical groove is formed in the boss in the vertical direction;

the adjusting screw (300) is connected with two threaded through holes in the middle of the top plate (101) through adjusting screw fixing screws (400), the long screws (102) penetrate through two unthreaded holes in the outer side of the top plate (101) to be connected with threaded through holes in the outer side of the base (103), and the base fixing screws (107) penetrate 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 semi-cylindrical groove is formed in the middle of the pressing block (104) in the vertical direction, is matched with the semi-cylindrical groove of the boss of the base (103) in the vertical direction, and is connected with and clamps the displacement sensor (105) through the pressing block fixing screw (106).

3. A roll forming apparatus auxiliary system for automatically adjusting a roll gap according to claim 1, wherein the roll gap adaptive adjusting device (2) comprises: the device comprises a shell (201), a scale threaded 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 limiting long screw (212), a limiting sleeve (213), a locking 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 holes, 4 reserved stepped threaded through holes for mounting pressure sensor fixing screws (219) and a threaded blind hole on the lower surface, the lower layer is of an annular structure, the 4 through holes are uniformly distributed in the annular structure 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 2 threaded holes on the upper layer are connected with the adjusting screw (300) through adjusting screw fixing screws (400);

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

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

the upper pressure plate (203) is fixedly connected to the outer side of the scale threaded column (202) through threads, a stepped groove is formed in the lower surface of the upper pressure plate (203), and the upper thrust bearing (204) is embedded into the stepped groove;

the lower pressure plate (205) is fixed on the outer side of the scale threaded 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, the annular grooves are outwards provided with two stepped through holes, the annular grooves are outwards provided with an annular groove with an inner thread on the inner wall, the outermost side is provided with four uniformly distributed threaded blind holes, and the chassis fixing screws (216) penetrate 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, a wire outlet hole is formed in the wall of the electromagnetic spring stator, an external thread is arranged at one end of the electromagnetic spring stator, and the external thread end is connected with the internal thread at the lower layer of the shell (201);

the electromagnetic spring rotor (210) is of a cylindrical 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, the step is provided with an external thread, and the external thread is connected with the annular groove with an internal thread on the base plate (215);

the electromagnetic spring coil (211) is regularly wound in an annular groove in the outer wall of the electromagnetic spring rotor (210), and two ends of the coil penetrate out of a wire outlet hole in 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 penetrate through a through hole of a core part of the electromagnetic spring rotor (210), the outer spring (207) is positioned between the upper pressure plate (203) and the base plate (215), the inner spring (208) is positioned between the lower pressure plate (205) and the base plate (215), the upper end and the lower end of the outer spring (207) and the upper end and the lower end of the inner spring (208) are both planes, and the lower ends are clamped in an outer annular groove of the base plate (215);

the limiting long screw (212) comprises a polished rod part and a thread 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 thread blind hole of the chassis (215), the outer diameter of the polished 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).

4. The roll bending forming equipment auxiliary system capable of automatically adjusting the roll gap is characterized in that 4 threaded blind holes are uniformly formed in the bottom of the pressure sensor (218) at intervals of 90 degrees and are 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 rod (300).

5. The roll forming apparatus auxiliary system for automatically adjusting a roll gap according to any one of claims 1 to 4, wherein 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), processes and converts the original signal and transmits the processed signal to the computer terminal (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 collecting 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, namely two roller gap self-adaptive adjusting devices (2) in the same forming pass share one adjustable power supply (302).