A floating bending straightening machine

Abstract

The present invention discloses a floating tension-bending straightening machine, comprising a frame consisting of an upper frame and a lower frame. The left side of the frame is hinged by a rotary unit and is provided with a tensioning and opening oil cylinder at the end. The right side of the lower frame is provided with a rotary locking oil cylinder symmetrically arranged in the longitudinal direction. The rotary locking oil cylinder locks the frame by cooperating with a preset window of the upper frame. A bending unit, a flattening unit, and a parallel roller straightening unit that can float up and down are provided at intervals in the direction from the inlet to the outlet at the junction of the frames. In addition, a deflection adjustment mechanism and a clearance elimination mechanism are provided at corresponding positions in the frame. The present invention can not only produce a large elongation for plate and strip materials through the coordinated cooperation of the bending unit and the flattening unit, but can also basically flatten various irregular plate shapes. Then, the internal stress is equalized while flattening by 23 rollers. Compared with the existing technology, unnecessary roller systems are reduced, new scratches are avoided, and the volume and cost of the equipment are greatly reduced, the production line is shortened, and the yield rate is improved while ensuring accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of metal plate and strip straightening equipment, and in particular relates to a floating stretch-bending straightening machine. Background Art

[0002] In recent years, with the rapid development of the market economy, people have higher and higher requirements for product performance, so that many deep-processed products have very high requirements for the transverse thickness and flatness of plate and strip materials, such as PS plate bases used in the printing industry and hydrophilic foil blanks used in air-conditioning radiators in the home appliance industry, etc. However, plate and strip materials that have only been processed by cold rolling mills are difficult to meet the above requirements. The reason is that during rolling, factors such as process parameters, installation level, and the shape of the roller gap are not appropriate, resulting in three-dimensional plate defects such as edge waves, scoop bends, and sickle bends after the product is formed. The thinner the plate and strip, the more obvious the defects.

[0003] Therefore, it is necessary to straighten the rolled plate and strip. The current practice commonly used in the industry is to first use a stretching and bending straightening machine to stretch and bend the strip with a certain tension along the work roll surface, so that the center plane of the plate and strip moves. After repeated bending and straightening, the plate and strip undergo plastic deformation, and the plate and strip becomes straight after the tension is removed. After the above treatment, the surface of the plate and strip looks smooth, but the internal stress of the plate and strip is not eliminated. In this way, the plate and strip will rebound and deform after being parked for a long time. When directly stamped, it often causes stamping cracks due to internal stress. To address this problem, a parallel roller straightening machine is generally set up to repeatedly bend the plate and strip treated by the stretching and bending straightening machine to eliminate the internal residual stress of the plate and strip and change the mechanical properties of the product. This approach meets the product flatness requirements to a certain extent, but the existing equipment has the following disadvantages: the existing stretching and bending straightening machines and parallel roller straightening machines are independent equipment, which are arranged in sequence and at intervals. They have the disadvantages of large investment and large plant space. At the same time, due to the lengthening of the distance of the entire production line, there is serious waste of the head and tail of the strip, resulting in a low yield rate; there are also very few composite straightening machines (that is, the stretching and bending straightening machine and the parallel roller straightening machine are integrated into one, such as the application number applied by our company is 2021231056776, and the name is an open high-precision composite straightening machine). Although it has largely solved the disadvantages of each individual product, the functional roller system inside it can only realize its own function. When the speeds between the functional roller systems are not matched, and there are more roller systems, it is easy to scratch the plate and strip. In addition, the requirements for the plate and strip are relatively high, and there are problems such as large size and high cost.

[0004] In addition, it is well known that the roller box of the bending unit is a consumable part and needs to be regularly maintained and replaced. Figure 6 As shown, it is generally locked by manpower relying on bolts and nuts in conjunction with disc springs, which has the disadvantages of low efficiency and inconvenient operation during replacement.

[0005] In view of this, the inventor proposes a floating tension-bending leveler to overcome the defects of the prior art. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide a floating stretch-bending and straightening machine. The bending unit of the stretch-bending and straightening machine adopts an up and down floating design, which cooperates with the flattening unit located on the lower frame to be able to straighten the plate and strip while providing a large elongation. Moreover, due to the use of a few-roller structure, the problem of scratches on the plate and strip during processing is avoided. The internal stress of the plate and strip is then homogenized through the parallel roller straightening unit to ensure that the plate and strip will not be deformed after processing. In addition, the stretch-bending and straightening machine of the present invention has the advantages of small size, low cost and high yield (greatly reducing the waste of strip heads and tails).

[0007] The purpose of the present invention is to solve the problem through the following technical solutions:

[0008] A floating tension and bending straightening machine includes a frame, the frame being composed of an upper frame and a lower frame connected together, the upper frame being located directly above the lower frame, one side of the upper frame being hinged to one side of the lower frame via a rotary unit, and the other side of the lower frame being longitudinally symmetrically provided with a rotary locking cylinder, the rotary locking cylinder locking the frame by cooperating with a preset window in the upper frame;

[0009] Among them, the frame is provided with a bending unit, a flattening unit and a parallel roller straightening unit in sequence along the direction of the rotary locking cylinder toward the rotary unit. The bending unit includes an upper bending unit and a lower bending unit. The upper bending unit is installed at the bottom of the upper frame through a first floating mechanism, and the lower bending unit is installed at the top of the lower frame through a second floating mechanism. The parallel roller straightening unit includes a 23-roller upper roller box symmetrically arranged at the bottom of the upper frame and a 23-roller lower roller box installed at the top of the lower frame. The flattening unit is fixedly arranged at the top of the lower frame, and the top surface height of the roller box of the flattening unit is on the same horizontal plane as the top surface height of the 23-roller lower roller box of the parallel roller straightening unit.

[0010] Furthermore, both the first floating mechanism and the second floating mechanism adopt a worm gear screw lifting structure, and the control mode of the first floating mechanism and the second floating mechanism is single control of each and / or synchronous dual control of both. Through each single control, the downward amount of the upper bending unit or the upward amount of the lower bending unit can be adjusted respectively. Through dual control of both, the downward amount or upward amount of the upper bending unit and the lower bending unit can be controlled at the same time, which is used to cooperate with the flattening unit to process plate and strip materials of different specifications.

[0011] Furthermore, a locking cylinder is provided between the upper bending unit and the first floating mechanism and between the lower bending unit and the second floating mechanism. The first cylinder barrel of the locking cylinder is fixedly arranged at the connection between the two. The end of the first piston rod of the locking cylinder is fixedly connected to a pressure plate. The pressure plate is located on the roller box seat inside the bending unit. When the roller box of the bending unit is replaced, the first piston rod of the locking cylinder is extended to disengage the pressure plate and the roller box seat of the bending unit. The roller box of the bending unit then falls onto the roller changing guide rail, making it easy to replace it.

[0012] Furthermore, a pressing mechanism is provided on the upper frame, the bottom end of which is fixedly connected to the 23-roller upper roller box of the parallel roller straightening unit, and is used to adjust the distance between the 23-roller upper roller box and the lower roller box;

[0013] The downward pressure mechanism is mainly composed of a worm gear screw elevator, a reduction motor and a coupling. The worm gear screw elevator is at least two groups, and the transmission screws at the bottom are fixedly connected to the top of the roller box on the 23 rollers. Multiple groups of the worm gear screw elevators are connected to the reduction motor through a coupling.

[0014] Furthermore, a deflection adjustment mechanism is horizontally provided on the top surface of the lower frame and below the lower roller box of the 23 rollers;

[0015] The deflection adjustment mechanism includes an upper inclined block installed on the bottom surface of the lower roller box of the 23-roller, and limit blocks are provided on both sides of the upper inclined block. The top surface of the lower frame is provided with a lower inclined block that matches the inclined surface of the upper inclined block. The end of the lower inclined block away from the rotary locking cylinder is fixedly connected to the drive shaft of the servo motor. The lower inclined block is driven by the servo motor to move left and right, and when the limit blocks on both sides are limited, the upper inclined block is raised or lowered.

[0016] Furthermore, the upper frame and the lower frame are located at one end of the rotary unit and are symmetrically provided with a tensioning and opening cylinder in the longitudinal direction. The tensioning and opening cylinder and the rotary unit are spaced apart in the horizontal direction. The second cylinder barrel of the tensioning and opening cylinder is fixedly installed on the outer side of the lower frame, and the second piston rod of the tensioning and opening cylinder is hinged to the bottom of the upper frame.

[0017] Furthermore, a gap eliminating mechanism is provided between the upper frame and the lower frame, near the parallel roller straightening unit, and the gap eliminating mechanism includes a sleeve fixedly provided on the top of the lower frame, a disc spring group is placed in the sleeve, and a stepped guide rod is provided in the sleeve and at the top of the disc spring group, and a pressure cover is fixedly connected to the top of the sleeve, and the large end of the guide rod is constrained in the sleeve through the cooperation of the pressure cover and the sleeve, and the small end of the guide rod contacts the lower surface of the upper frame through the reaction force generated by the disc spring group, so as to improve the processing accuracy of the floating tension and bending straightening machine.

[0018] Furthermore, the third cylinder barrel of the rotary locking oil cylinder is mounted on the lower frame through an end flange, a locking portion is mounted on the top end of the third piston rod of the rotary locking oil cylinder, four cam units are evenly distributed in an annular pattern on the lower portion of the third piston rod, and a cam groove is provided on the inner wall of the third cylinder barrel for constraining the movement trajectory of each cam unit;

[0019] Each of the cam units includes a guide column horizontally arranged at the lower part of the third piston rod, and a bearing is installed at the end of the guide column. When the third piston rod is extended or retracted, the bearing moves along the cam groove.

[0020] Furthermore, the locking portion is a rectangular locking plate structure, which is fixedly mounted on the top end of the third piston rod by fasteners and cooperates with a preset window on the upper frame to lock the upper frame and the lower frame.

[0021] Furthermore, a rectangular lock plate position detection switch is provided at the preset window of the upper frame, and an upper frame position detection switch is provided on the upper surface of the lower frame at the corresponding position. When the rotary locking cylinder completes a stroke, the rotation angle of its third piston rod is 90 degrees.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention provides a floating stretch-bending and straightening machine, which is mainly composed of a bending unit that floats up and down, a flattening unit fixed at the bottom, and a parallel roller straightening unit, wherein the bending unit and the flattening unit can not only withstand a large tension through cooperation, but also avoid the speed difference between the two, so that the two can not only produce a large elongation when processing plate and strip materials, but also can flatten the plate and strip materials and avoid scratches, that is, the plate and strip materials with irregular changes can basically meet the straightness requirements after being processed by the bending unit and the flattening unit, and then a smaller tension is applied after passing through the parallel roller straightening unit (23 rollers), and the plate and strip materials are further flattened while their internal stress is homogenized, which reduces the burden on the roller system in the parallel roller straightening unit, shortens the replacement frequency, extends the working cycle of the equipment, and reduces the processing cost of the plate and strip materials; at the same time, since the bending unit adopts an up and down floating structure, it can adapt to the processing of plate and strip materials of different specifications.

[0024] 2. The present invention provides a floating stretch and bending straightening machine. Through the reasonable layout of different roller systems, compared with the existing technology, it not only greatly reduces the overall volume of the equipment and reduces the production cost, but also is equipped with a deflection adjustment mechanism, an anti-backlash mechanism and a rotary locking cylinder and other structures, especially reducing the volume, so that the production line distance is significantly shortened relative to the existing technology, thereby reducing the waste of the head and tail of the belt, and improving the yield rate of plate and strip processing. At the same time, it reduces the speed difference between the roller system and each, avoids scratches on the plate and strip, and ensures the accuracy and quality of the processed plate and strip.

[0025] 3. The present invention provides a floating tension and straightening machine, which adopts an open structure of upper and lower frames. By tightening the opening cylinder to apply a tensile force to the upper frame (the rotary locking cylinder is opened), the upper frame will rotate a certain angle around the axis of the rotary unit, that is, one end of the upper and lower frames is in an open state at this time, which is convenient for the staff to clean and maintain the interior of the equipment, especially the cleaning and maintenance of the roller box. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the invention.

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 This is a schematic diagram of the overall structure of a floating bending leveler of the present invention;

[0029] Figure 2 This is a structural schematic diagram of a downward pressing mechanism in a floating type tension and bending leveler of the present invention;

[0030] Figure 3 It is a structural schematic diagram of a deflection adjustment mechanism in a floating tension and bending leveler of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a rotary locking oil cylinder in a floating tension and bending straightening machine of the present invention;

[0032] Figure 5 This is a structural schematic diagram of a backlash elimination mechanism in a floating type tension and bending straightening machine of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the existing technology that uses bolts and nuts in conjunction with disc springs to lock the bending unit roller box;

[0034] Figure 7 It is a structural schematic diagram of the present invention for locking / disassembling the bending unit roller box by locking the oil cylinder.

[0035] Among them: 1 is the frame; 2 is the rotary unit; 3 is the rotary locking cylinder; 4 is the bending unit; 5 is the bending unit; 6 is the parallel roller straightening unit; 7 is the locking cylinder; 8 is the deflection adjustment mechanism; 9 is the tensioning and opening cylinder; 10 is the anti-backlash mechanism; 11 is the upper frame; 12 is the lower frame; 31 is the third cylinder; 32 is the third piston rod; 33 is the locking part; 34 is the cam unit; 35 is the cam groove; 36 is the rectangular lock plate position detection switch; 37 is the upper frame position detection switch; 41 is the upper bending unit; 42 is the lower bending unit; 61 is the upper roller box of 23 rollers; 62 is the lower roller box of 23 rollers; 71 is the first cylinder; 72 is the first piston rod; 73 is the pressure plate; 81 is the upper inclined block; 82 is the limit block; 83 is the lower inclined block; 84 is the servo motor; 91 is the second cylinder; 92 is the second piston rod; 101 is the sleeve; 102 is the disc spring assembly; 103 is the guide rod; 104 is the pressure cover; 111 is the first floating mechanism; 112 is the downward pressing mechanism; 121 is the second floating mechanism; 1121 is the worm screw elevator; 1122 is the reduction motor; 1123 is the coupling. DETAILED DESCRIPTION

[0036] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of arrangements consistent with certain aspects of the present invention as detailed in the appended claims.

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0038] See Figure 1 As shown, the present invention provides a floating tension and bending straightening machine, including a frame, wherein the frame 1 is composed of an upper frame 11 and a lower frame 12, and the upper frame 11 is located directly above the lower frame 12 and is symmetrically arranged. The left side of the upper frame 11 is hinged to the inner left side of the lower frame 12 through a rotary unit (rotating shaft) 2, and a rotary locking cylinder 3 is longitudinally symmetrically arranged on the right side of the lower frame 12. The rotary locking cylinder 3 locks the frame 1 by cooperating with a preset window in the upper frame 11.

[0039] Among them, inside the frame 1, at the middle junction of the upper frame 11 and the lower frame 12, a bending unit 4, a flattening unit 5 and a parallel roller straightening unit 6 are arranged in sequence along the inlet direction (rotating locking cylinder 3) to the outlet direction (rotating unit 2), and the bending unit 4 includes an upper bending unit 41 and a lower bending unit 42. The upper bending unit 41 is installed at the bottom of the upper frame 11 through a first floating mechanism 111, and the lower bending unit 42 is installed at the top of the lower frame 12 through a second floating mechanism 121. The parallel roller straightening unit 6 includes a 23-roller upper roller box 61 symmetrically arranged at the bottom of the upper frame 11 and a 23-roller lower roller box 62 installed at the top of the lower frame 12. The flattening unit 5 is a group of roller boxes and is fixedly arranged on the top of the lower frame 12, and the top surface height of the roller box of the flattening unit 5 is on the same horizontal plane as the top surface height of the 23-roller lower roller box 62 of the parallel roller straightening unit 6. Through the above settings, the bending unit 4 and the flattening unit 5 that float up and down can not only withstand greater tension through coordinated cooperation, but also avoid the speed difference between the two, so that the two can not only produce a large elongation when processing plate and strip materials, but also can flatten the plate and strip materials and avoid scratches. In addition, since the bending unit 4 as a whole can float up and down at the same time or the upper bending unit 41 and the lower bending unit 42 float up and down respectively, by setting up a group of bending units 4 and flattening units 5, plate and strip materials of different specifications can be processed, while reducing the size of the whole machine (shortening the length of the production line), the scope of application of the equipment is expanded, and at the same time, the waste of the belt head and tail is reduced, the yield rate of the plate and strip materials is improved, and the economy of the equipment processing is improved, so that the equipment has strong competitiveness in the market.

[0040] Specifically, the first floating mechanism 111 and the second floating mechanism 121 of the embodiment of the present invention both utilize a worm gear screw lifting structure (including at least a worm gear screw lifter, a coupling, and a reduction motor). Of course, other lifting structures are also acceptable as long as they can accurately control the amount of depression of the upper bending unit 41 and the amount of advancement of the lower bending unit 42. The details are omitted. The first floating mechanism 111 and the second floating mechanism 121 can be controlled in two ways (controlling the reduction motor): one is single control, in which each mechanism is independently controlled, and the other is synchronous dual control, in which both mechanisms are simultaneously controlled. Each single control can adjust the amount of depression of the upper bending unit 41 or the amount of advancement of the lower bending unit 42, respectively. Synchronous dual control can simultaneously control the amount of descent or elevation of both bending units 41 and 42. Operation can be controlled based on the operator's experience (e.g., the flatness of the plate and strip). Automatic control is preferred, i.e., by providing a plate shape detection mechanism at the inlet, and then adjusting the bending unit 5 in real time based on the detection results via the worm gear screw lifter, so as to coordinate with the flattening unit 6 to process plate and strip materials of different specifications.

[0041] In addition, a pressing mechanism 112 is provided on the upper frame 11 of the present invention, and the bottom end of the pressing mechanism 112 is fixedly connected to the 23-roller upper roller box 61 of the parallel roller straightening unit 6, and is used to adjust the distance between the 23-roller upper roller box 61 and the lower roller box 62. Figure 2 As shown, the pressing mechanism 112 mainly consists of a worm screw elevator 1121, a reduction motor 1122 and a coupling 1123. There are at least two groups of worm screw elevators 1121 (symmetrically arranged on the top of the roller box 61 of the 23 rollers), and the transmission screws at the bottom are fixedly connected to the top of the roller box 61 of the 23 rollers. The multiple groups of worm screw elevators 1121 and the reduction motor 1122 are connected through the coupling 1123. At the same time, a deflection adjustment mechanism 8 is horizontally arranged on the top surface of the lower frame 12 and below the lower roller box 62 of the 23 rollers. Figure 3 As shown, the deflection adjustment mechanism 8 includes an upper inclined block 81 installed on the bottom surface of the lower roller box 62 of the 23-roller, and limit blocks 82 are provided on both sides of the upper inclined block 81. The top surface of the lower frame 12 is provided with a lower inclined block 83 that matches the inclined surface of the upper inclined block 81. The end of the lower inclined block 83 away from the rotary locking cylinder 3 is fixedly connected to the drive shaft of the servo motor 84. The lower inclined block 83 is driven by the servo motor 84 to move left and right, and when the limit blocks 82 on both sides are limited, the upper inclined block 81 is raised or lowered.

[0042] like Figure 4 As shown, the third cylinder 31 of the rotary locking oil cylinder 3 of the embodiment of the present invention is installed on the lower frame 12 through the end flange, and the top of the third piston rod 31 of the rotary locking oil cylinder 3 is installed with a locking portion 33, which can extend into a preset window on the upper frame 11, and four cam units 34 are evenly distributed in an annular manner on the lower part of the third piston rod 32. The inner wall of the third cylinder 31 is provided with a cam groove 35 for constraining the movement trajectory of each cam unit 34; wherein, each cam unit 34 includes a guide column horizontally arranged at the lower part of the third piston rod 32, and a bearing is installed at the end of the guide column. When the third piston rod 32 is extended or retracted, the bearing moves along the cam groove 35; preferably, the locking portion 33 is a rectangular locking plate structure, which is fixedly installed on the top of the third piston rod 32 by fasteners and cooperates with the window pre-opened on the upper frame 11. Every time the rotary locking cylinder 3 completes a stroke, the rotation angle of its third piston rod 32 is 90 degrees, that is, the cam unit 34 in the rotary locking cylinder is always constrained by the cam groove 35. The third piston rod 32 extends or retracts while rotating, and drives the locking part 33 at the end to rotate a corresponding angle, so as to decide whether to engage in the window of the upper frame according to the equipment situation, and be used to lock or cooperate to open the frame 1, ensure the stability of the frame 1 during processing, and improve the precision of the product.

[0043] like Figure 5As shown, in an embodiment of the present invention, a plurality of gap elimination mechanisms 10 are arranged at longitudinal intervals between the upper frame 11 and the lower frame 12, near the parallel roller straightening unit 6, for eliminating the gap caused by rotation and equipment span, thereby improving the accuracy of equipment processing. Specifically, the gap elimination mechanism 10 in the embodiment of the present invention includes a sleeve 101 fixedly arranged on the top of the lower frame 12, a disc spring group 102 is placed in the sleeve 101, a stepped guide rod 103 is arranged in the sleeve 101 and located at the top of the disc spring group 102, and a pressure cap 104 is fixedly connected to the top of the sleeve 101. The large end of the guide rod 103 is constrained in the sleeve 101 by the cooperation of the pressure cap 104 and the sleeve 101, and the small end of the guide rod 103 contacts the lower surface of the upper frame 11 through the reaction force generated by the disc spring group 102. Preferably, the top surface of the guide rod 103 is an arc surface. When the gravity point of the upper frame 11 acts on the arc surface of the guide rod 103, the guide rod 103 moves downward to compress the disc spring group 102, causing the disc spring group 102 to deform. At the same time, the disc spring group 102 generates a reaction force to eliminate the gap, thereby ensuring the processing accuracy of the equipment.

[0044] In addition, since the bending unit 4 needs to withstand a large tension during use, its roller box needs to be replaced, but the existing roller box locking mechanism is as follows: Figure 6 As shown, it is usually locked manually by relying on bolts and nuts in conjunction with disc springs, which has low installation and replacement efficiency and is inconvenient to operate. Figure 7 As shown, the locking cylinder 7 is arranged between the upper bending unit 41 and the first floating mechanism 111 and the lower bending unit 42 and the second floating mechanism 121, that is, the first cylinder 71 of the locking cylinder 7 is fixedly arranged at the connection between the two, and the end of the first piston rod 72 of the locking cylinder 7 is fixedly connected to the pressure plate 73, and the pressure plate 73 is located on the roller box seat inside the bending unit 5. When the roller box of the bending unit 5 is replaced, the first piston rod 72 of the locking cylinder 7 is extended to disengage the pressure plate 73 and the roller box seat of the bending unit 5, and the roller box of the bending unit 5 immediately falls onto the roller changing guide rail, which is convenient for replacement. The one-button operation saves replacement time.

[0045] The floating bending and straightening machine of the embodiment of the present invention adopts an open structure as a whole. Specifically, the tensioning and opening cylinders 9 are symmetrically arranged in the longitudinal front and back at one end of the upper frame 11 and the lower frame 12 located at the rotary unit 2. The tensioning and opening cylinders 9 and the rotary unit 3 are arranged at a horizontal distance, preferably at a certain angle to maximize the utilization of the force applied by the cylinder. The second cylinder barrel 91 of the tensioning and opening cylinder 9 is fixedly installed on the outer side of the lower frame 12, and the second piston rod 92 of the tensioning and opening cylinder 9 is hinged to the bottom of the upper frame 11.

[0046] In order to ensure the safety of the operation of the floating tension and bending straightening machine of the present invention, a rectangular lock plate position detection switch 36 is provided at the preset window of the upper frame 11 in this embodiment, and an upper frame position detection switch 37 is provided on the upper surface of the lower frame 12 at the corresponding position; when it is necessary to open the upper frame 11, first ensure that the rotary locking cylinder 3 is in the open state, that is, when the third piston rod 32 is extended under the oil pressure drive, since four cam units 34 are arranged at the lower part of the third piston rod 32, under the constraint of the cam curved groove 35, the third piston The rod 32 extends upward and rotates at the same time. When the third piston rod 32 completes its stroke, the third piston rod 32 rotates 90 degrees, and at the same time drives the rectangular lock plate on its top to rotate 90 degrees, so that the rectangular lock plate is consistent with the preset window direction of the upper frame 11. At the same time, the position of the rectangular lock plate is detected by the rectangular lock plate position detection switch 36. When the rectangular lock plate position detection switch 36 sends a signal, the upper frame 11 can execute the opening command under the action of the tensioning opening cylinder 9, tightening the second piston rod 9 of the opening cylinder 9. 2 is retracted under the drive of oil pressure, and the upper frame 11 is rotated around it with the rotary unit 2 as the fulcrum. When the upper frame 11 forms a predetermined angle with the right end of the lower frame 12, the tensioning and opening of the oil cylinder 9 is stopped, which is convenient for the staff to clean and maintain the interior of the equipment, especially the cleaning and maintenance of each roller box. When the upper frame 11 needs to be closed, it is also necessary to ensure that the rotary locking oil cylinder 3 is in the open state. At this time, the rectangular lock plate position detection switch 36 is always in the signaling state. When the upper frame 11 is tightened and the oil cylinder 9 is opened, the upper frame 11 is in the state of opening. After closing to the position under the action, the upper frame position detection switch 37 provided on the lower frame 12 detects that the upper frame 11 is closed in place and starts to send a signal. At this time, the rotary locking cylinder 3 starts to execute the retraction command of the third piston rod 32. The third piston rod 32 rotates 90 degrees under the limit of the cam unit 34 and the cam groove 35, and at the same time rotates with the rectangular locking plate, so that the rectangular locking plate is 90 degrees to the preset window direction of the upper frame 11. The rectangular locking plate is pressed on the bottom surface of the preset window, and the upper frame 11 and the lower frame 12 are locked.

[0047] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0048] It should be understood that the present invention is not limited to the above description and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A floating tension and bending straightening machine, characterized in that: The machine comprises a frame (1), wherein the frame (1) is composed of an upper frame (11) and a lower frame (12) connected together, and the upper frame (11) is located directly above the lower frame (12), one side of the upper frame (11) is hinged to one side of the lower frame (12) through a rotary unit (2), and a rotary locking oil cylinder (3) is provided on the other side of the lower frame (12) in a longitudinally front-to-back symmetrical manner, and the rotary locking oil cylinder (3) locks the frame (1) by cooperating with a preset window of the upper frame (11); wherein, a bending unit (4), a flattening unit (5) and a parallel roller straightening unit (6) are sequentially arranged in the frame (1) along the direction from the rotary locking cylinder (3) to the rotary unit (2); the bending unit (4) comprises an upper bending unit (41) and a lower bending unit (42); the upper bending unit (41) is mounted on the bottom of the upper frame (11) via a first floating mechanism (111); the lower bending unit (42) is mounted on the top of the lower frame (12) via a second floating mechanism (121); the parallel roller straightening unit (6) comprises a 23-roller upper roller box (61) symmetrically arranged on the bottom of the upper frame (11) and a 23-roller lower roller box (62) mounted on the top of the lower frame (12); the flattening unit (5) is fixedly arranged on the top of the lower frame (12); and the top surface height of the roller box of the flattening unit (5) and the top surface height of the 23-roller lower roller box (62) of the parallel roller straightening unit (6) are on the same horizontal plane; The first floating mechanism (111) and the second floating mechanism (121) both adopt a worm gear screw lifting structure, and the control mode of the first floating mechanism (111) and the second floating mechanism (121) is single control of each and / or synchronous dual control of both. Through the single control of each, the pressing amount of the upper bending unit (41) or the pressing amount of the lower bending unit (42) can be adjusted respectively. Through the dual control of both, the descending amount or ascending amount of the upper bending unit (41) and the lower bending unit (42) can be controlled simultaneously, so as to cooperate with the flattening unit (5) to process plate and strip materials of different specifications; A locking oil cylinder (7) is provided between the upper bending unit (41) and the first floating mechanism (111) and between the lower bending unit (42) and the second floating mechanism (121). The first cylinder barrel (71) of the locking oil cylinder (7) is fixedly provided at the connection between the two. The end of the first piston rod (72) of the locking oil cylinder (7) is fixedly connected to a pressure plate (73). The pressure plate (73) is located on the roller box seat inside the bending unit (4). When the roller box of the bending unit (4) is replaced, the first piston rod (72) of the locking oil cylinder (7) extends to disengage the pressure plate (73) from the roller box seat of the bending unit (4). The roller box of the bending unit (4) then falls onto the roller changing guide rail, making it easy to replace it.

2. A floating tension and bending leveler according to claim 1, characterized in that: The upper frame (11) is provided with a pressing mechanism (112), the bottom end of which is fixedly connected to the 23-roller upper roller box (61) of the parallel roller straightening unit (6) and is used to adjust the distance between the 23-roller upper roller box (61) and the 23-roller lower roller box (62); The pressing mechanism (112) is composed of a worm screw elevator (1121), a reduction motor (1122) and a coupling (1123). The worm screw elevator (1121) is provided in at least two groups, and the transmission screws at the bottom ends are fixedly connected to the top of the 23-roller upper roller box (61). The multiple groups of the worm screw elevator (1121) and the reduction motor (1122) are connected via the coupling (1123).

3. A floating tension and bending leveler according to claim 2, characterized in that: A deflection adjustment mechanism (8) is horizontally provided between the top surface of the lower frame (12) and below the lower roller box (62) of the 23-roller; The deflection adjustment mechanism (8) includes an upper inclined block (81) mounted on the bottom surface of the 23-roller lower roller box (62), and limit blocks (82) are provided on both sides of the upper inclined block (81). The top surface of the lower frame (12) is provided with a lower inclined block (83) that matches the inclined surface of the upper inclined block (81). One end of the lower inclined block (83) away from the rotary locking cylinder (3) is fixedly connected to the drive shaft of the servo motor (84). The lower inclined block (83) is driven by the servo motor (84) to move left and right, and when the limit blocks (82) on both sides are limited, the upper inclined block (81) is raised or lowered.

4. The floating tension and bending leveler according to claim 1, characterized in that: The upper frame (11) and the lower frame (12) are symmetrically provided with a tensioning and opening oil cylinder (9) at one end of the rotary unit (2) in the longitudinal direction. The tensioning and opening oil cylinder (9) and the rotary unit (2) are spaced apart in the horizontal direction. The second cylinder barrel (91) of the tensioning and opening oil cylinder (9) is fixedly installed on the outer side of the lower frame (12), and the second piston rod (92) of the tensioning and opening oil cylinder (9) is hinged to the bottom of the upper frame (11).

5. The floating tension and bending leveler according to claim 1, characterized in that: A gap elimination mechanism (10) is provided between the upper frame (11) and the lower frame (12), near the parallel roller straightening unit (6). The gap elimination mechanism (10) includes a sleeve (101) fixedly provided on the top of the lower frame (12), a disc spring group (102) is placed in the sleeve (101), a stepped guide rod (103) is provided in the sleeve (101) and located on the top of the disc spring group (102), a pressure cover (104) is fixedly connected to the top of the sleeve (101), and the large end of the guide rod (103) is constrained in the sleeve (101) by the cooperation between the pressure cover (104) and the sleeve (101), and the small end of the guide rod (103) contacts the lower surface of the upper frame (11) through the reaction force generated by the disc spring group (102), so as to improve the processing accuracy of the floating bending straightening machine.

6. The floating tension and bending leveler according to claim 1, characterized in that: The third cylinder barrel (31) of the rotary locking oil cylinder (3) is mounted on the lower frame (12) via an end flange, a locking portion (33) is mounted on the top end of the third piston rod (32) of the rotary locking oil cylinder (3), four cam units (34) are evenly distributed in a ring shape on the lower portion of the third piston rod (32), and a cam groove (35) is provided on the inner wall of the third cylinder barrel (31) for constraining the movement trajectory of each cam unit (34); Each of the cam units (34) includes a guide column horizontally arranged at the lower part of the third piston rod (32), and a bearing is installed at the end of the guide column. When the third piston rod (32) is extended or retracted, the bearing moves along the cam groove (35).

7. The floating tension and bending leveler according to claim 6, characterized in that: The locking portion (33) is a rectangular parallelepiped locking plate structure, which is fixedly mounted on the top end of the third piston rod (32) via a fastener and cooperates with a preset window located on the upper frame (11) to lock the frame (1).

8. The floating tension and bending leveler according to claim 7, characterized in that: A rectangular lock plate position detection switch (36) is provided at a preset window of the upper frame (11), and an upper frame position detection switch (37) is provided on the upper surface of the lower frame (12) at a corresponding position. When the rotary locking cylinder (3) completes each stroke, the rotation angle of its third piston rod (32) is 90 degrees.

Images