阅读说明：本技术 一种板材反复弯曲校平加工装置及加工方法 (Repeated bending and leveling machining device and machining method for plates ) 是由 贾建波 杨志刚 徐博 彭伟劲 徐岩 董添添 姜腾蛟 周露洋 于 2021-06-30 设计创作，主要内容包括：本发明公开一种板材反复弯曲校平加工装置,包括横梁单元、模具单元、移动工作平台和驱动单元,模具单元包括弯曲上模、弯曲下模和滚轴,弯曲上模和弯曲下模相配合能够对待加工板材实施反复弯曲变形,弯曲上模、弯曲下模以及移动工作平台相配合能够压平待加工板材,移动工作平台带动弯曲下模运动,结合滚轴转动,能够完成待加工板材的校平。本发明还提供一种板材反复弯曲校平加工方法,弯曲下模与弯曲上模相配合完成对待加工板材的正弯曲,然后完成对待加工板材的反弯曲,记为一道次反复弯曲变形；完成多道次反复弯曲变形后,将待加工板材压平,移动工作平台朝向滚轴方向运动,待加工板材在滚轴和移动工作平台以及弯曲下模的碾搓作用下完成校平。(The invention discloses a repeated bending and leveling processing device for a plate, which comprises a cross beam unit, a die unit, a movable working platform and a driving unit, wherein the die unit comprises an upper bending die, a lower bending die and a rolling shaft, the upper bending die and the lower bending die are matched to implement repeated bending deformation on the plate to be processed, the upper bending die, the lower bending die and the movable working platform are matched to flatten the plate to be processed, the movable working platform drives the lower bending die to move, and the rolling shaft is combined to rotate, so that the leveling of the plate to be processed can be completed. The invention also provides a plate repeated bending and leveling processing method, wherein the lower bending die and the upper bending die are matched to finish the positive bending of the plate to be processed, and then the reverse bending of the plate to be processed is finished and is marked as one-time repeated bending deformation; after the multi-pass repeated bending deformation is completed, the plate to be processed is flattened, the movable working platform moves towards the direction of the rolling shaft, and the plate to be processed is leveled under the rolling action of the rolling shaft, the movable working platform and the bending lower die.)

1. The utility model provides a panel bending flattening processingequipment that relapses which characterized in that includes:

the beam unit can compress the plate to be processed;

the die unit comprises an upper bending die, a lower bending die and a roller, the upper bending die and the lower bending die are connected with the beam unit in a sliding mode, the upper bending die and the lower bending die are matched and can bend the plate to be processed, and the roller is connected with the beam unit in a rotating mode;

the movable working platform can be connected with the cross beam unit in a sliding mode, the rotating axis of the rolling shaft is parallel to the plane of the movable working platform, and the movable working platform, the lower bending die and the rolling shaft are matched to level the plate to be machined;

and the bending upper die, the bending lower die and the movable working platform are respectively in transmission connection with the driving unit.

2. The apparatus for repeated bending and leveling of a plate material as set forth in claim 1, wherein: the beam unit comprises an upper beam, a middle movable beam and a lower beam, and the middle movable beam can be slidably arranged between the upper beam and the lower beam; the bending upper die can be slidably connected with the middle movable cross beam, the roller can be rotatably connected with the middle movable cross beam, the movable working platform can be slidably arranged on the lower cross beam, and the bending lower die can be slidably connected with the movable working platform.

3. The apparatus for repeated bending and leveling of a plate material as set forth in claim 2, wherein: an upright post is arranged between the upper cross beam and the lower cross beam, and the middle movable cross beam can be sleeved outside the upright post in a sliding manner; the number of the upright columns is four, the four upright columns are arranged in parallel, and the movable working platform is positioned in a space surrounded by the four upright columns.

4. The apparatus for repeated bending and leveling of a plate material as set forth in claim 3, wherein: the upright post is provided with a side vertical surface which is a plane, the side vertical surface is connected with an upright post guide plate, and the upright post guide plate is connected with the middle movable cross beam in a sliding manner; and a guide block is further arranged between the upright post and the middle movable cross beam, and the axial section of the guide block is wedge-shaped.

5. The apparatus for repeated bending and leveling of a plate material as set forth in claim 2, wherein: the driving unit comprises a plunger type main hydraulic cylinder, a piston type auxiliary hydraulic cylinder, a return hydraulic cylinder and a lower piston type hydraulic cylinder, fixed ends of the plunger type main hydraulic cylinder and the piston type auxiliary hydraulic cylinder are connected with the upper cross beam, a movable end of the plunger type main hydraulic cylinder is connected with the middle movable cross beam, a movable end of the piston type auxiliary hydraulic cylinder is connected with the upper bending die, a fixed end of the lower piston type hydraulic cylinder is connected with the lower cross beam, and a movable end of the lower piston type hydraulic cylinder is connected with the lower bending die;

the return hydraulic cylinder is in transmission connection with the middle movable cross beam and can drive the middle movable cross beam to reset;

the axes of the plunger type main hydraulic cylinder, the piston type auxiliary hydraulic cylinder and the return hydraulic cylinder are parallel.

6. The apparatus for repeated bending and leveling of a plate material as set forth in claim 5, wherein: the beam unit further comprises a top plate, the top plate is located at the top of the upper beam, the movable end of the return hydraulic cylinder can slidably penetrate through the upper beam and is connected with the top plate, the top plate is connected with the middle movable beam through a pull rod, the number of the pull rods is two, and the two pull rods are symmetrically arranged on two sides of the upper beam.

7. The apparatus for repeated bending and leveling of a plate material as set forth in claim 5, wherein: the bending upper die is located at the top of the bending lower die, the bending upper die is connected with the piston type auxiliary hydraulic cylinder through an upper sliding block, the upper sliding block is connected with the middle movable cross beam in a sliding mode, the bending lower die is connected with the lower piston type hydraulic cylinder through a lower sliding block, the bending lower die is located at the top of the lower sliding block and abutted against the top of the lower sliding block, and the lower sliding block is connected with the movable working platform in a sliding mode.

8. The apparatus for repeated bending and leveling of a plate material as set forth in claim 7, wherein: a spherical hinge is arranged between the piston type auxiliary hydraulic cylinder and the upper sliding block;

and auxiliary sliding blocks and guide rails are arranged between the upper sliding block and the middle movable cross beam and between the lower sliding block and the lower cross beam, and the auxiliary sliding blocks can be arranged in the guide rails in a sliding manner.

9. The apparatus for repeated bending and leveling of a plate material as set forth in claim 1, wherein: the driving unit further comprises a pushing assembly, the pushing assembly comprises a pushing motor, a push plate and a push rod, the pushing motor is in transmission connection with the push plate through a coupler and a ball screw, the push plate is connected with the push rod, and one end, far away from the push plate, of the push rod is connected with the movable working platform; the number of the push rods is two, and the two push rods are parallel and are symmetrically arranged by taking the center line of the push plate as an axis.

10. A method for repeated bend leveling of a plate material by using the device for repeated bend leveling of a plate material as set forth in any one of claims 1 to 9, comprising the steps of:

placing a plate to be processed on the movable working platform, wherein the upper bending die and the lower bending die are both abutted to the plate to be processed;

step two, the bending lower die and the bending upper die are matched to finish forward bending of the plate to be processed, the bending lower die and the bending upper die move in opposite directions and are matched to finish reverse bending of the plate to be processed, and the bending direction of the forward bending is opposite to that of the reverse bending and is marked as one-time repeated bending deformation;

step three, repeating the step two, and after multi-pass repeated bending deformation is completed, the driving unit drives the lower bending die and the upper bending die to reset;

and step four, the bending upper die, the moving working platform and the bending lower die are matched with each other to flatten the plate to be processed, the moving working platform moves towards the direction of the rolling shaft, and the flattened plate to be processed is leveled under the rolling action of the rolling shaft, the moving working platform and the bending lower die.

Technical Field

The invention relates to the technical field of sheet plastic processing, in particular to a sheet repeated bending leveling processing device and a sheet repeated bending leveling processing method.

Background

The hydraulic press is a typical forging press which is manufactured by using the Pascal principle and uses high-pressure liquid as a force transmission medium to transmit working pressure. The hydraulic press has the advantages of high output pressure, large working stroke of the slide block, convenient and adjustable speed, stable working stroke, overload protection and the like, is widely applied to forming processes such as forging, stamping, correcting, press fitting, powder pressing and the like, and particularly plays an important role in the fields of aviation, aerospace, military industry, automobiles and the like as key forming equipment for preparing large-size and high-quality forgings. With the appearance of new forming process and forming technology, the application range of the hydraulic press in the forming field of metal materials, non-metal materials, composite materials and the like is improved, and the hydraulic press is developed towards the forming precision and forming diversification. In recent years, special hydraulic machines have attracted more and more attention, such as double-acting sheet drawing hydraulic machines, powder sintering extrusion heading and repeated forming hydraulic machines, and the like.

In actual production, different sheet plastic forming process methods are adopted to prepare metal products with different shapes and excellent performance. With the development of light structure in the industries of automobiles, electronics and the like, the common plate is difficult to meet the further development requirements of light structure and light weight materials, and new plastic processing technology and equipment are promoted to prepare and produce light weight structural materials with good mechanical properties and light weight. The Strong Plastic Deformation (SPD) technology has obvious advantages in the aspect of preparing high-performance light structural materials, and crystal grains of metal materials can be obviously refined, so that the physical, chemical and mechanical properties of the metal materials are improved. The Repeated Bending Leveling (RBL) process can accumulate uniform large plastic deformation through repeated bending deformation of the plate in multiple passes and the plate leveling process on the premise of not changing the chemical components of the plate, thereby obtaining the fine-grained plate with excellent mechanical property.

At present, related research for improving the mechanical property of a metal plate through an RBL (radial basis function) process is not systematic, the traditional RBL is mostly completed on a common hydraulic press, and the requirement of integrated forming of repeated gradual high-pressure bending, rolling, rubbing and leveling of the metal plate cannot be met.

Therefore, how to change the current situation that the hydraulic press cannot meet the requirements of the repeated bending and leveling process in the prior art becomes a problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a plate repeated bending and leveling processing device and a processing method, which are used for solving the problems in the prior art and improving the working efficiency of repeated bending and leveling processing of a plate.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a plate repeated bending and leveling processing device, which comprises:

the beam unit can compress the plate to be processed;

the die unit comprises an upper bending die, a lower bending die and a roller, the upper bending die and the lower bending die are connected with the beam unit in a sliding mode, the upper bending die and the lower bending die are matched and can bend the plate to be processed, and the roller is connected with the beam unit in a rotating mode;

the movable working platform can be connected with the cross beam unit in a sliding mode, the rotating axis of the rolling shaft is parallel to the plane of the movable working platform, and the movable working platform, the lower bending die and the rolling shaft are matched to level the plate to be machined;

and the bending upper die, the bending lower die and the movable working platform are respectively in transmission connection with the driving unit.

Preferably, the beam unit includes an upper beam, a middle movable beam and a lower beam, and the middle movable beam is slidably disposed between the upper beam and the lower beam; the bending upper die can be slidably connected with the middle movable cross beam, the roller can be rotatably connected with the middle movable cross beam, the movable working platform can be slidably arranged on the lower cross beam, and the bending lower die can be slidably connected with the movable working platform.

Preferably, an upright post is arranged between the upper cross beam and the lower cross beam, and the middle movable cross beam can be slidably sleeved outside the upright post; the number of the upright columns is four, the four upright columns are arranged in parallel, and the movable working platform is positioned in a space surrounded by the four upright columns.

Preferably, the upright post is provided with a side vertical surface, the side vertical surface is a plane, the side vertical surface is connected with an upright post guide plate, and the upright post guide plate is connected with the middle movable cross beam in a sliding manner; and a guide block is further arranged between the upright post and the middle movable cross beam, and the axial section of the guide block is wedge-shaped.

Preferably, the driving unit comprises a main plunger type hydraulic cylinder, an auxiliary piston type hydraulic cylinder, a return hydraulic cylinder and a lower piston type hydraulic cylinder, fixed ends of the main plunger type hydraulic cylinder and the auxiliary piston type hydraulic cylinder are connected with the upper cross beam, a movable end of the main plunger type hydraulic cylinder is connected with the middle movable cross beam, a movable end of the auxiliary piston type hydraulic cylinder is connected with the upper bending die, a fixed end of the lower piston type hydraulic cylinder is connected with the lower cross beam, and a movable end of the lower piston type hydraulic cylinder is connected with the lower bending die;

the return hydraulic cylinder is in transmission connection with the middle movable cross beam and can drive the middle movable cross beam to reset;

the axes of the plunger type main hydraulic cylinder, the piston type auxiliary hydraulic cylinder and the return hydraulic cylinder are parallel.

Preferably, the beam unit further comprises a top plate, the top plate is located at the top of the upper beam, the movable end of the return hydraulic cylinder can slidably penetrate through the upper beam and is connected with the top plate, the top plate is connected with the middle movable beam through a pull rod, the number of the pull rods is two, and the two pull rods are symmetrically arranged on two sides of the upper beam.

Preferably, the upper bending die is located at the top of the lower bending die, the upper bending die is connected with the piston type auxiliary hydraulic cylinder through an upper sliding block, the upper sliding block is connected with the middle movable cross beam in a sliding mode, the lower bending die is connected with the lower piston type hydraulic cylinder through a lower sliding block, the lower bending die is located at the top of the lower sliding block and is abutted against the lower bending die, and the lower sliding block is connected with the movable working platform in a sliding mode.

Preferably, a spherical hinge is arranged between the piston type auxiliary hydraulic cylinder and the upper sliding block;

and auxiliary sliding blocks and guide rails are arranged between the upper sliding block and the middle movable cross beam and between the lower sliding block and the lower cross beam, and the auxiliary sliding blocks can be arranged in the guide rails in a sliding manner.

Preferably, the driving unit further comprises a pushing assembly, the pushing assembly comprises a pushing motor, a push plate and a push rod, the pushing motor is in transmission connection with the push plate through a coupler and a ball screw, the push plate is connected with the push rod, and one end, far away from the push plate, of the push rod is connected with the movable working platform; the number of the push rods is two, and the two push rods are parallel and are symmetrically arranged by taking the center line of the push plate as an axis.

The invention also provides a plate repeated bending and leveling processing method, which utilizes the plate repeated bending and leveling processing device and comprises the following steps:

placing a plate to be processed on the movable working platform, wherein the upper bending die and the lower bending die are both abutted to the plate to be processed;

step two, the bending lower die and the bending upper die are matched to finish forward bending of the plate to be processed, the bending lower die and the bending upper die move in opposite directions and are matched to finish reverse bending of the plate to be processed, and the bending direction of the forward bending is opposite to that of the reverse bending and is marked as one-time repeated bending deformation;

step three, repeating the step two, and after multi-pass repeated bending deformation is completed, the driving unit drives the lower bending die and the upper bending die to reset;

and step four, the bending upper die, the moving working platform and the bending lower die are matched with each other to flatten the plate to be processed, the moving working platform moves towards the direction of the rolling shaft, and the flattened plate to be processed is leveled under the rolling action of the rolling shaft, the moving working platform and the bending lower die.

Compared with the prior art, the invention has the following technical effects: the invention relates to a plate repeated bending and leveling processing device which comprises a beam unit, a die unit, a movable working platform and a driving unit, wherein the beam unit can compress a plate to be processed; the die unit comprises an upper bending die, a lower bending die and a roller, the upper bending die and the lower bending die are connected with the beam unit in a sliding mode, the upper bending die and the lower bending die are matched to bend the plate to be processed, and the roller is connected with the beam unit in a rotating mode; the movable working platform can be connected with the cross beam unit in a sliding mode, the rotating axis of the rolling shaft is parallel to the plane of the movable working platform, and the movable working platform, the lower bending die and the rolling shaft are matched to level the plate to be processed; the bending upper die, the bending lower die and the movable working platform are respectively connected with the driving unit in a transmission way.

According to the repeated bending and leveling processing device for the plate, the upper bending die and the lower bending die are matched to perform repeated bending deformation on the plate to be processed, the upper bending die is matched with the movable working platform and the lower bending die to flatten the plate to be processed, in addition, the movable working platform drives the lower bending die to move, and the rolling shaft rotates in a combined manner, so that the leveling of the plate to be processed can be completed in a matched manner. The plate repeated bending and leveling processing device disclosed by the invention is simple in structure and convenient to operate, combines multi-pass repeated bending deformation and rolling leveling of a plate to be processed, effectively shortens the process flow, improves the production efficiency and reduces the production cost.

The invention also provides a plate repeated bending and leveling processing method, which utilizes the plate repeated bending and leveling processing device and comprises the following steps: placing a plate to be processed on a movable working platform, wherein an upper bending die and a lower bending die are abutted to the plate to be processed; the bending lower die and the bending upper die are matched to finish forward bending of the plate to be processed, the bending lower die and the bending upper die move in opposite directions and are matched to finish reverse bending of the plate to be processed, and the bending direction of the forward bending is opposite to that of the reverse bending and is marked as one-time repeated bending deformation; step three, repeating the step two, and after multi-pass repeated bending deformation is completed, driving the lower bending die and the upper bending die to reset by the driving unit; and step four, the bending upper die is matched with the movable working platform and the bending lower die to flatten the plate to be processed, the movable working platform moves towards the direction of the rolling shaft, and the flattened plate to be processed is leveled under the rolling action of the rolling shaft, the movable working platform and the bending lower die.

The repeated bending and leveling processing method for the plate can effectively refine the microstructure of the plate, improve the comprehensive mechanical property of the plate and obtain the fine-grained plate with good surface quality and excellent mechanical property on the premise of not changing the chemical components of the plate.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a front view, cut-away, schematic view of a repeated bending and leveling device for sheet materials according to the present invention;

FIG. 2 is a schematic top view of the device for repeated bending and leveling of sheet material according to the present invention;

FIG. 3 is a schematic side view of the device for repeated bending and leveling of sheet material according to the present invention;

FIG. 4 is a process flow diagram of the method for repeated bending and leveling of sheet material according to the present invention;

the machining tool comprises a beam unit 1, an upper beam 101, a middle movable beam 102, a lower beam 103, a vertical column 104, a vertical column guide plate 105, a guide block 106, a top plate 107, a pull rod 108, a bearing table 109, a die unit 2, an upper bending die 201, a lower bending die 202, a roller 203, an upper slide 204, a lower slide 205, an auxiliary slide 206, a guide rail 207, a press block 208, a movable working platform 3, a driving unit 4, a main plunger hydraulic cylinder 401, a secondary piston hydraulic cylinder 402, a return hydraulic cylinder 403, a lower piston hydraulic cylinder 404, a pushing assembly 405, a pushing motor 406, a push plate 407, a push rod 408, a coupler 409, a ball screw 410 and a plate 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a plate repeated bending and leveling processing device and a processing method, which are used for solving the problems in the prior art and improving the working efficiency of repeated bending and leveling processing of a plate.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-4, fig. 1 is a sectional view in a front view of the device for repeatedly bending and leveling sheet material of the present invention, fig. 2 is a schematic view in a top view of the device for repeatedly bending and leveling sheet material of the present invention, fig. 3 is a schematic view in a side view of the device for repeatedly bending and leveling sheet material of the present invention, and fig. 4 is a process flow chart of the method for repeatedly bending and leveling sheet material of the present invention.

The invention provides a plate repeated bending and leveling processing device, which comprises:

the device comprises a beam unit 1, wherein the beam unit 1 can press a plate 5 to be processed;

the die unit 2 comprises a bending upper die 201, a bending lower die 202 and a roller 203, the bending upper die 201 and the bending lower die 202 are slidably connected with the beam unit 1, the bending upper die 201 and the bending lower die 202 are matched to bend the plate 5 to be processed, and the roller 203 is rotatably connected with the beam unit 1;

the movable working platform 3 is connected with the beam unit 1 in a sliding mode, the rotating axis of the rolling shaft 203 is parallel to the plane of the movable working platform 3, and the movable working platform 3, the bending lower die 202 and the rolling shaft 203 are matched to level the plate 5 to be processed;

the driving unit 4, the bending upper die 201, the bending lower die 202 and the movable working platform 3 are respectively in transmission connection with the driving unit 4.

According to the plate repeated bending and leveling processing device, the upper bending die 201 and the lower bending die 202 are matched to perform repeated bending deformation on a plate 5 to be processed, the upper bending die 201, the movable working platform 3 and the lower bending die 202 are matched to flatten the plate 5 to be processed, in addition, the movable working platform 3 and the lower bending die 202 move and are combined with the rotation of the rolling shaft 203, and the three parts are matched to complete leveling of the plate 5 to be processed. The plate repeated bending and leveling processing device disclosed by the invention is simple in structure and convenient to operate, and combines multiple-pass repeated bending deformation and rolling leveling of a plate 5 to be processed, so that the process flow is effectively shortened, the production efficiency is improved, and the production cost is reduced.

The beam unit 1 comprises an upper beam 101, a middle movable beam 102 and a lower beam 103, wherein the middle movable beam 102 can be slidably arranged between the upper beam 101 and the lower beam 103; the bending upper die 201 is slidably connected to the middle movable beam 102, the roller 203 is rotatably connected to the middle movable beam 102, the movable table 3 is slidably disposed on the lower beam 103, and the bending lower die 202 is slidably connected to the movable table 3. The upper cross beam 101, the middle movable cross beam 102 and the lower cross beam 103 provide an installation foundation for the mold unit 2, the movable working platform 3 and the driving unit 4, and the structural stability of the device is improved.

In order to improve the motion accuracy of the middle movable cross beam 102, a vertical column 104 is arranged between the upper cross beam 101 and the lower cross beam 103, the middle movable cross beam 102 can be slidably sleeved outside the vertical column 104, and the vertical column 104 can provide guidance for the reciprocating motion of the middle movable cross beam 102; in this specific embodiment, the number of the columns 104 is four, and the four columns 104 are arranged in parallel, so that the motion guiding accuracy is improved, and the normal operation of other parts is not affected, and the movable working platform 3 is located in the space surrounded by the four columns 104, and the size of the movable working platform 3 is smaller than that of the space surrounded by the four columns 104, so that the columns 104 are prevented from affecting the motion of the movable working platform 3.

It should be further noted that the upright post 104 has a side elevation, and the arrangement of the side elevation on the upright post 104 can avoid the dislocation caused by the rotation of the middle movable cross beam 102 relative to the upright post 104; in the present embodiment, the column 104 is cylindrical, and four side elevations are formed on the circumferential surface of the middle section of the column 104; in addition, the side elevation of the upright post 104 is connected with an upright post guide plate 105, the upright post guide plate 105 can be connected with the middle movable cross beam 102 in a sliding manner, and the upright post guide plate 105 can further provide guidance for the reciprocating motion of the middle movable cross beam 102 relative to the upright post 104, so that the motion accuracy of the middle movable cross beam 102 is improved; a guide block 106 is further arranged between the upright post 104 and the middle movable cross beam 102, the axial section of the guide block 106 is wedge-shaped, and here, it should be noted that the guide block 106 is used for installation and guide of the upright post 104, so that the assembly accuracy of the device is improved.

Specifically, the driving unit 4 includes a plunger type main hydraulic cylinder 401, a plunger type auxiliary hydraulic cylinder 402, a return hydraulic cylinder 403 and a lower plunger type hydraulic cylinder 404, fixed ends of the plunger type main hydraulic cylinder 401 and the plunger type auxiliary hydraulic cylinder 402 are connected with the upper cross beam 101, a movable end of the plunger type main hydraulic cylinder 401 is connected with the middle movable cross beam 102, a movable end of the plunger type auxiliary hydraulic cylinder 402 is connected with the bending upper die 201, a fixed end of the lower plunger type hydraulic cylinder 404 is connected with the lower cross beam 103, and a movable end of the lower plunger type hydraulic cylinder 404 is connected with the bending lower die 202; the plunger type main hydraulic cylinder 401 can drive the middle movable cross beam 102 to move, the piston type auxiliary hydraulic cylinder 402 can drive the bending upper die 201 to move relative to the middle movable cross beam 102, and the lower piston type hydraulic cylinder 404 can drive the bending lower die 202 to move.

The return hydraulic cylinder 403 is in transmission connection with the middle movable cross beam 102, the return hydraulic cylinder 403 can drive the middle movable cross beam 102 to reset, and the axes of the plunger type main hydraulic cylinder 401, the piston type auxiliary hydraulic cylinder 402 and the return hydraulic cylinder 403 are parallel.

More specifically, the beam unit 1 further includes a top plate 107, the top plate 107 is located on the top of the upper beam 101, the movable end of the return hydraulic cylinder 403 can slidably penetrate through the upper beam 101 and is connected with the top plate 107, the top plate 107 is connected with the middle movable beam 102 through a pull rod 108, the number of the pull rods 108 is two, and the two pull rods 108 are symmetrically arranged on two sides of the upper beam 101, so that the force uniformity of the middle movable beam 102 is improved. The return hydraulic cylinder 403 drives the top plate 107 to move, and the top plate 107 drives the middle movable cross beam 102 by using the pull rod 108 to realize return resetting.

The bending upper die 201 is positioned at the top of the bending lower die 202, the bending upper die 201 is connected with the piston type auxiliary hydraulic cylinder 402 by the upper sliding block 204, the upper sliding block 204 can be connected with the middle movable cross beam 102 in a sliding mode, the section size of the bending upper die 201 is smaller than that of the upper sliding block 204, the upper sliding block 204 is arranged to ensure that the moving direction of the bending upper die 201 is accurate, and dislocation in the moving process of the bending upper die 201 is avoided; the plunger type main hydraulic cylinder 401 is further connected with a pressing block 208, the pressing block 208 is fixed on the middle movable cross beam 102, the pressing block 208 can apply force to the plate 5 to be processed and can assist the bending upper die 201 to flatten the plate 5 to be processed, and the pressing block 208 and the bending upper die 202 have similar functions.

The lower bending die 202 is connected with the lower piston type hydraulic cylinder 404 through the lower sliding block 205, the lower bending die 202 is located at the top of the lower sliding block 205 and is abutted to the lower sliding block 205, the lower sliding block 205 can be connected with the movable working platform 3 in a sliding mode, the lower sliding block 205 can enable the lower bending die 202 to be ejected out of the movable working platform 3, meanwhile the lower bending die 202 and the movable working platform are not connected, the influence on the movement of the lower bending die 202 along with the movable working platform 3 is avoided, and the movement direction of the movable working platform 3 relative to the lower cross beam 103 is perpendicular to the movement direction of the upper bending die 201 relative to the lower bending die 202.

In addition, a spherical hinge is arranged between the piston type auxiliary hydraulic cylinder 402 and the upper sliding block 204;

further, an auxiliary sliding block 206 and a guide rail 207 are arranged between the upper sliding block 204 and the middle movable cross beam 102 and between the lower sliding block 205 and the lower cross beam 103, and the auxiliary sliding block 206 can be slidably arranged in the guide rail 207, so that the moving smoothness is improved, and the upper sliding block 204 and the lower sliding block 205 are prevented from deviating from the moving direction.

Besides, the driving unit 4 further comprises a pushing assembly 405, the pushing assembly 405 comprises a pushing motor 406, a pushing plate 407 and a pushing rod 408, the pushing motor 406 is in transmission connection with the pushing plate 407 through a coupler 409 and a ball screw 410, the pushing plate 407 is connected with the pushing rod 408, and one end of the pushing rod 408, which is far away from the pushing plate 407, is connected with the movable working platform 3. The pushing motor 406 can be an electromagnetic speed regulating motor, the pushing motor 406 drives the pushing plate 407 to move by using the coupler 409 and the ball screw 410, and the pushing plate 407 drives the pushing rod 408 to move, and then drives the moving working platform 3 connected with the pushing rod 407 to reciprocate.

It should be further noted that the lower cross beam 103 is further connected with a bearing table 109, the bearing table 109 is disposed on one side of the lower cross beam 103 away from the pushing assembly 405, a top surface of the bearing table 109 is flush with a surface of the lower cross beam 103, and when the movable working platform 3 and the bending lower die 202 move and cooperate with the roller 203 to complete leveling of the plate 5 to be processed, the bearing table 109 can support the movable working platform 3 and the bending lower die 202. In order to reduce the friction coefficient between the bearing platform 109 and the lower cross beam 103 and the movable working platform 3, sliding rails are arranged on the bearing platform 109 and the lower cross beam 103, and the movable working platform 3 is slidably arranged on the sliding rails, so that the sliding smoothness of the movable working platform 3 is improved. One end of the bearing platform 109, which is far away from the lower cross beam 103, is also provided with a limit stop to limit the limit position of the movable working platform 3, so that the safety of the device is improved.

Furthermore, the invention also provides a plate repeated bending and leveling processing method, which utilizes the plate repeated bending and leveling processing device and comprises the following steps:

step one, a plate 5 to be processed is placed on a horizontal plane formed by the three bending lower dies 202 and the movable working platform 3, and the pressure of the lower piston type hydraulic cylinder 404 is adjusted to be a preset back pressure. The plunger type main hydraulic cylinder 401 and the piston type auxiliary hydraulic cylinders 402 on the two sides of the plunger type main hydraulic cylinder synchronously drive the middle movable cross beam 102 and the two bending upper dies 201 to move downwards until the middle movable cross beam contacts with the upper surface of the plate 5 to be processed and then stop moving.

Step two, synchronously adjusting the pressure of the two piston type auxiliary hydraulic cylinders 402 to working pressure, adjusting the working pressure of the main plunger type hydraulic cylinder 401 to preset back pressure, synchronously driving the bending upper die 201 to move downwards to perform downward bending deformation on two ends of the plate 5 to be processed by the two piston type auxiliary hydraulic cylinders 402, then synchronously adjusting the two piston type auxiliary hydraulic cylinders 402 and the two lower piston type hydraulic cylinders 404 corresponding to the two piston type auxiliary hydraulic cylinders 402 to preset back pressure, adjusting the working pressure of the main plunger type hydraulic cylinder 401 to preset back pressure, adjusting the pressure of the middle lower piston type hydraulic cylinder 404 to working pressure, driving the bending lower die 202 to move upwards to perform upward bending deformation on the middle part of the plate to be processed by the middle lower piston type hydraulic cylinder 404, and completing the positive bending process of the plate; the pressure of the plunger type main hydraulic cylinder 401 is synchronously adjusted to working pressure, the working pressure of the middle lower piston type hydraulic cylinder 404 is adjusted to preset back pressure, the plunger type main hydraulic cylinder 401 drives the pressing block 208 to move downwards to perform downward reverse bending of the middle part of the plate 5 to be processed, the working pressures of the middle lower piston type hydraulic cylinder 404 and the plunger type main hydraulic cylinder 401 are adjusted to preset back pressure, the working pressures of the two piston type auxiliary hydraulic cylinders 402 are synchronously adjusted to preset back pressure, the working pressures of the lower piston type hydraulic cylinders 404 on the two sides are synchronously adjusted, the lower piston type hydraulic cylinders 404 on the two sides drive the bending lower die 202 to move upwards to perform upward reverse bending deformation of the two ends of the plate 5 to be processed, and the reverse bending process of the plate 5 to be processed is completed and is marked as 1-pass repeated bending deformation.

And step three, circularly performing the step two, completing multi-pass accumulated repeated bending deformation, after the multi-pass accumulated repeated bending deformation is completed for a preset number of times, driving the lower bending die 202 to reset by the lower piston type hydraulic cylinder 404, driving the upper bending die 201 to reset by the piston type auxiliary hydraulic cylinder 402, and driving the middle movable cross beam 102 to reset by the return hydraulic cylinder 403.

And step four, synchronously adjusting the pressure of the lower piston type hydraulic cylinder 404, the main piston type hydraulic cylinder 401 and the piston type auxiliary hydraulic cylinders 402 on the two sides of the main piston type hydraulic cylinder to a preset flattening working pressure. The plunger type main hydraulic cylinder 401 and the piston type auxiliary hydraulic cylinders 402 on the two sides of the plunger type main hydraulic cylinder synchronously drive the middle movable cross beam 102 and the bending upper die 201 to move downwards to flatten the plate 5 to be processed after multi-pass accumulated repeated bending deformation is completed. Under the action of the pushing motor 406, the movable working platform 3 drives the bending lower die 202 to move leftwards along the slide rail, and the flattened plate 5 to be processed is leveled under the rolling action of the rolling shaft 203, the movable working platform 3 and the bending lower die 202.

And step five, taking down the leveled plate, driving the bending upper die 201 to reset by the piston type auxiliary hydraulic cylinder 402, driving the middle movable cross beam 102 to reset by the return hydraulic cylinder 403, driving the movable working platform 3 and the bending lower die 202 to reset by the pushing motor 406, and driving the bending lower die 202 to reset by the lower piston type hydraulic cylinder 404.

The repeated bending and leveling processing method for the plate can effectively refine the microstructure of the plate, improve the comprehensive mechanical property of the plate and obtain the fine-grained plate with good surface quality and excellent mechanical property on the premise of not changing the chemical components of the plate.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.