An efficient roll changing system for heavy plate straightening machine

Abstract

The present invention discloses an efficient roll changing system for a heavy and wide plate straightening machine, which includes a housing (5), a roll changing drive device (9), a main drive spindle (8) and a spindle adjusting mechanism (1). A roll system device (3) is arranged inside the housing (5), and the roll system device (3) includes a straightening roll (31). The roll changing drive device (9) is located on the operating side of the housing (5), and both the main drive spindle (8) and the spindle adjusting mechanism (1) are located on the drive side of the housing (5). One end of the main drive spindle (8) is connected to one end of the straightening roll (31), and the other end of the main drive spindle (8) is connected with a drive mechanism. The spindle adjusting mechanism (1) can adjust the position of one end of the main drive spindle (8) in the vertical direction. This efficient roll changing system for the heavy and wide plate straightening machine has the advantages of fast roll changing rhythm, stable process, safety and reliability, and high automation level.

Description

Technical Field

[0001] The present invention relates to the field of metal sheet processing equipment, and particularly to an efficient roll changing system for a heavy plate straightening machine. Background Art

[0002] The straightening machine is one of the main finishing equipment on the heavy plate production line, used to straighten steel plates so that their flatness meets national standards and customer requirements. In order to improve the plate shape, product quality and production efficiency, modern straightening machines adopt a variety of technologies and means. The straightening process of the steel plate is a process of multiple bending and springback. After several times of bending and springback by the straightening rolls, the flatness of the steel plate should meet the standard requirements. Since the thickness and original curvature of each steel plate are different, the required number of bending times and the degree of bending are also different. The degree of bending of each straightening roll participating in the work can be achieved by setting different forms of straightening roll gaps; after a period of straightening, the roll bodies of the straightening rolls and backup rolls will all show relatively large wear. The wear degree of the straightening rolls and backup rolls is closely related to their arrangement positions in the roll system; the uneven wear of the straightening rolls and backup rolls will affect the straightening quality of the steel plate. Therefore, it is necessary to regularly replace the straightening roll system, grind and maintain the worn straightening rolls and backup rolls, comprehensively inspect the straightening roll bearings, backup roll bearings, seals, lubrication pipelines, cooling pipelines, etc. of the old roll system, replace the parts that do not meet the use requirements, and reassemble them into a complete roll system for use in the next cycle to ensure the good operation of the straightening machine equipment and excellent straightening effect.

[0003] For the replacement of the straightening roll system, the currently commonly used method is to replace the upper roll system as a whole. Through the roll changing pads, the upper roll system as a whole falls on the lower roll system, and then under the action of the roll changing drive mechanism, the upper and lower roll systems as a whole move to the operation side of the straightening machine body, and then are hoisted as a whole or in parts by the crane in the workshop; but there will also be cases where the lower roll system is separately withdrawn. Such cases are mainly for the daily maintenance of the roll system, such as cleaning the scale inside the roll system and locally grinding the surface of the straightening roll. According to past production experience, the time for such maintenance and repair is very short, generally completed during the intermittent time for replacing the work rolls of the rolling mill, which is basically on-line maintenance and cannot affect the rolling rhythm of the entire production line.

[0004] In addition, the straightening rolls of existing straightening machines mostly adopt grouped or individual drives and transmit torque through splines. When changing rolls, the old roll system is pulled out of the housing by the roll-changing drive mechanism, and the spline teeth of the straightening rolls are disengaged from the spline sleeve of the universal joint shaft. When the new roll system is pushed in, it is easy to cause the misalignment of the positions of the spline teeth and the spline sleeve, resulting in the inability to directly and accurately insert the new roll system, prolonging the roll-changing time and reducing the production efficiency. Some existing straightening machines are equipped with special tools designed for rapid roll change, such as roll spline templates, but these operations also require a large amount of manual assistance time, and it is necessary to ensure that all the straightening rolls do not rotate at any angle after the old roll system is withdrawn. Otherwise, the roll spline template will set the wrong initial angle for the spline teeth of the straightening rolls of the new roll system, which will instead delay more roll-changing time.

[0005] The steel plate specifications produced by heavy plate mills vary widely, and the straightening conditions and requirements are also very different. At present, according to the different layout positions of the straightening machines, they can be divided into pre-straightening machines, hot straightening machines and cold straightening machines, and the types of each straightening machine are diverse. In order to more flexibly target various types of straightening machines, SMS-SIEMAG (ThyssenKrupp) of Germany has introduced two different roll-changing systems in recent years, which are respectively applied to the pre / hot straightening machines and cold straightening machines of heavy plates. The characteristics of the roll-changing system for pre / hot straightening machines are that three layers of locking mechanisms are set, which have the advantages of reliable locking and relatively accurate positioning. However, the locking mechanism in the middle layer requires manual loading, unloading and positioning operations, with high labor intensity for workers and many potential safety hazards, and a long roll-changing time. The roll-changing system of the cold straightening machine adopts two layers of locking mechanisms, which have a high degree of automation. In theory, the operation of the locking mechanism does not require manual assistance. However, due to the structural form of the universal joint shaft affecting the layout of the locking mechanism, the locking effect of the locking mechanism is not ideal. At present, some domestic heavy plate mills have modified this structural form. The roll-changing system of the heavy plate straightening machine designed by Siemens VAI (VAI) also belongs to a three-layer locking structure, and the middle locking mechanism is improved to have a swinging function, which shortens the roll-changing time to a certain extent, but still requires manual assistance. Moreover, due to the fixed position of the swinging mechanism, and the middle locking mechanism not only needs to swing but also needs to lift, so faults such as jamming often occur. Summary of the Invention

[0006] In order to achieve rapid roll change, the present invention provides an efficient roll-changing system for a heavy plate straightening machine, which has the advantages of fast roll-changing rhythm, stable process, safety and reliability, and high degree of automation.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: An efficient roll-changing system for a heavy and wide plate straightening machine, comprising a housing, a roll-changing driving device, a main transmission spindle and a spindle adjusting mechanism. A roll system device is provided inside the housing, and the roll system device includes straightening rolls. The roll-changing driving device is located on the operating side of the housing, and both the main transmission spindle and the spindle adjusting mechanism are located on the driving side of the housing. One end of the main transmission spindle is connected to one end of the straightening roll, and a driving mechanism is connected to the other end of the main transmission spindle. The spindle adjusting mechanism can adjust the position of one end of the main transmission spindle in the vertical direction.

[0008] The main transmission spindle includes an upper transmission main shaft and a lower transmission main shaft arranged vertically. The spindle adjusting mechanism includes a lower crossbeam assembly, an intermediate crossbeam assembly and an upper crossbeam assembly arranged successively from bottom to top. The positions of the lower crossbeam assembly, the intermediate crossbeam assembly and the upper crossbeam assembly can all be adjusted in the vertical direction. The lower crossbeam assembly and the intermediate crossbeam assembly can clamp and fix the lower transmission main shaft, and the intermediate crossbeam assembly and the upper crossbeam assembly can clamp and fix the upper transmission main shaft.

[0009] A lower crossbeam lifting mechanism is provided below the lower crossbeam assembly. The lower crossbeam assembly includes a lower crossbeam frame, and a lower clamping member for the lower layer is provided on the upper surface of the lower crossbeam frame. The lower crossbeam lifting mechanism includes a screw jack and a shaft rod connected successively. One end of the shaft rod is connected to a hydraulic motor, and the other end of the shaft rod is connected to an absolute encoder. The lifting screw rod of the screw jack is connected to the lower crossbeam frame, and the hydraulic motor can drive the lower crossbeam assembly to move in the vertical direction through the shaft rod and the screw jack in sequence.

[0010] The intermediate crossbeam assembly includes an intermediate crossbeam frame. An upper clamping member for the lower layer is provided on the upper surface of the intermediate crossbeam frame, and a lower clamping member for the upper layer is provided on the lower surface of the intermediate crossbeam frame. Lifting and swinging supports are provided at both the left and right ends of the intermediate crossbeam frame. The lifting and swinging supports are connected to the lower crossbeam assembly through lower row hydraulic cylinders, and the lifting and swinging supports are connected to the upper crossbeam assembly through upper row hydraulic cylinders.

[0011] The intermediate crossbeam frame includes a left half intermediate crossbeam section and a right half intermediate crossbeam section arranged left and right. The left end of the left half intermediate crossbeam section is connected to the left lifting and swinging support through a left swinging pin shaft. A left swinging hydraulic cylinder is connected to the left side of the lifting and swinging support. The left swinging hydraulic cylinder can drive the left half intermediate crossbeam section to rotate around the left swinging pin shaft. The right end of the right half intermediate crossbeam section is connected to the right lifting and swinging support through a right swinging pin shaft. A right swinging hydraulic cylinder is connected to the right side of the lifting and swinging support. The right swinging hydraulic cylinder can drive the right half intermediate crossbeam section to rotate around the right swinging pin shaft. Both the left swinging pin shaft and the right swinging pin shaft are in an upright state.

[0012] A first synchronizing shaft is provided below the lower crossbeam assembly. The axis of the first synchronizing shaft is arranged in the left-right direction. The first synchronizing shaft is connected to the housing through the first synchronizing shaft mounting seat. Both the left and right ends of the first synchronizing shaft are connected with a first mechanical synchronizing mechanism. The first mechanical synchronizing mechanism includes a first synchronizing gear, a first synchronizing rack and a first lifting rod. The first synchronizing gear is fixedly sleeved outside the first synchronizing shaft. The first synchronizing rack is fixed to the lower part of the first lifting rod. The first synchronizing gear meshes with the first synchronizing rack. The lower end of the first lifting rod is connected to the housing through the lower mounting seat of the lifting rod. The upper end of the first lifting rod is fixedly connected to the lifting swing support through the upper mounting seat of the lifting rod.

[0013] The upper crossbeam assembly includes an upper crossbeam frame. A second synchronizing shaft is provided above the upper crossbeam assembly. The axis of the second synchronizing shaft is arranged in the left-right direction. The second synchronizing shaft is connected to the upper crossbeam assembly through the second synchronizing shaft mounting seat. Both the left and right ends of the second synchronizing shaft are connected with a second mechanical synchronizing mechanism. The second mechanical synchronizing mechanism includes a second synchronizing gear and a second synchronizing rack. The second synchronizing gear is fixedly sleeved outside the second synchronizing shaft. The second synchronizing rack is connected to the upper part of the housing through the rack mounting seat. The second synchronizing gear meshes with the second synchronizing rack.

[0014] The roll system device includes an upper roll system and a lower roll system arranged up and down. An upper and lower roll system positioning device is provided between the upper roll system and the lower roll system. The upper and lower roll system positioning device includes an operator side positioning component and a drive side positioning component. The operator side positioning component is located on the operator side of the roll system device. The drive side positioning component is located on the drive side of the roll system device. The upper roll system includes an upper roll box. The lower roll system includes backup rolls and a lower roll box. The straightening rolls are located in the upper roll box and the lower roll box. Multiple roll changing wheels are provided at the bottom of the lower roll box. The multiple roll changing wheels are symmetrically arranged left and right.

[0015] An external spline structure is provided on the outer surface of one end of the straightening roll. A lateral outward inclination angle is provided at the end of the external spline structure. An introduction section is provided on the outside of one end of the straightening roll. The outer diameter of the introduction section is smaller than the outer diameter of the external spline structure. The axis of the introduction section coincides with the axis of the external spline structure. A chamfer transition of 15°-25° is designed at the starting end of the introduction section.

[0016] The main drive coupling shaft includes a positioning gland, a spline sleeve, a positioning locking section, a cross head and a connecting section connected in sequence. An internal spline structure is provided on the inner surface of the spline sleeve. A lateral inward inclination angle is provided at the entry section of the spline sleeve. The outer diameter of the positioning locking section is smaller than the outer diameter of the spline sleeve.

[0017] An upper movable crossbeam is provided inside the upper part of the housing. The upper movable crossbeam is connected to the housing through a roll gap adjusting mechanism. An upper roll system locking mechanism is provided on the upper movable crossbeam. A lower roll system lifting device is provided inside the lower part of the housing.

[0018] The beneficial effects of the present invention are:

[0019] 1. The coupling shaft adjustment mechanism in the present invention can quickly and accurately fix and precisely adjust the position of the main drive coupling shaft. This device includes a three-layer crossbeam assembly and a lower crossbeam lifting mechanism. The lower crossbeam lifting mechanism consists of several screw jacks connected in series and is driven by a hydraulic motor, enabling the lower crossbeam assembly to be adjusted in the vertical direction to adapt to the position of the lower row of main drive coupling shafts. A high-precision absolute encoder is provided outside the screw jack to monitor the position of the lower crossbeam assembly in real time, facilitating the flexible adjustment of the position of the lower row of main drive coupling shafts according to the actual position of the lower row of straightening rolls when pushing in a new roll set.

[0020] 2. The intermediate crossbeam assembly of the coupling shaft adjustment mechanism in the present invention is composed of two independent lifting mechanisms and a swinging mechanism, which are respectively located on the inlet side and the outlet side of the high-efficiency roll change system of the heavy plate straightening machine, enabling the intermediate crossbeam assembly to automatically swing in the horizontal direction and automatically lift in the vertical direction. The swinging mechanism is directly fixed on the lifting mechanism on the same side, solving the problem of incoordination between the swinging crossbeam and the swinging mechanism due to the height change of the swinging crossbeam. A mechanical synchronization mechanism is provided between the lifting mechanisms on both sides to ensure that the intermediate crossbeams on both sides will always be at the same height, guaranteeing that the locking force on each main drive coupling shaft in the lower row is basically the same. The magnitude of the locking force is controlled by the hydraulic system and can be adjusted according to the actual situation on site.

[0021] 3. Mechanical synchronization devices are also designed at both ends of the upper crossbeam assembly of the coupling shaft adjustment mechanism in the present invention, enabling the upper crossbeam to always be in a horizontal state during the vertical adjustment process, ensuring that the locking force on each main drive coupling shaft in the upper row is basically the same. The magnitude of the locking force is controlled by the hydraulic system and can be adjusted according to the actual situation on site. In addition, the upper crossbeam of the present invention has an automatic position monitoring function. During the production state, when the upper crossbeam drops to a certain set position due to reasons such as hydraulic system leakage, the upper row of hydraulic cylinders will automatically replenish oil to lift the upper crossbeam to the highest position, avoiding equipment failures.

[0022] 4. The upper roll set locking mechanism in the present invention has two functions of telescoping and rotating, which can quickly lock and release the upper roll set device. It is not only simple and convenient to operate but also reliably ensures the safety of the straightening machine maintenance personnel. The upper roll set locking mechanism is installed on both sides of the upper movable crossbeam, making maintenance and replacement very convenient.

[0023] 5. The present invention optimizes the structures of the straightening roll drive spline pair and the main drive coupling shaft. Without detecting the position of the spline angle, the smooth introduction of the spline pair can be achieved when replacing the roll set, saving the steps of manually detecting the spline tooth angle position of the old straightening roll and adjusting the spline tooth angle position of the new straightening roll, and avoiding errors caused by the abnormal rotation of the old straightening roll. This makes the entire roll change process simple, fast, and greatly improves production efficiency. Brief Description of the Drawings

[0024] The accompanying drawings of the specification, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0025] Figure 1 is the front view of the high-efficiency roll-changing system of the heavy plate straightening machine described in the present invention.

[0026] Figure 2 is Figure 1 the schematic plan view in the direction of A in

[0027] Figure 3 is Figure 1 the schematic perspective view in the direction of A in

[0028] Figure 4 is along Figure 2 the sectional view in the direction of B-B in

[0029] Figure 5 is along Figure 2 the sectional view in the direction of C-C in

[0030] Figure 6 is the front view of the intermediate crossbeam assembly.

[0031] Figure 7 is the schematic perspective view of the intermediate crossbeam assembly.

[0032] Figure 8 is the schematic sectional view of the intermediate crossbeam assembly.

[0033] Figure 9 is the schematic perspective view of the main drive spindle.

[0034] Figure 10 is the schematic sectional view of the main drive spindle.

[0035] Figure 11 is the front view of the roll-changing drive device.

[0036] Figure 12 is the top view of the roll-changing drive device.

[0037] Figure 13 is the front view of the roll system device.

[0038] Figure 14 is the right view of the roll system device.

[0039] 1. Spindle adjustment mechanism;

[0040] 11. Lower crossbeam assembly; 111. Lower crossbeam frame; 112. Lower clamping member at the lower layer; 113. Wear-resistant slider;

[0041] 12. Intermediate crossbeam assembly; 121. Intermediate crossbeam frame; 122. Swing hydraulic cylinder; 123. Lifting and swing support; 124. Upper row hydraulic cylinder; 125. Lower row hydraulic cylinder; 126. Push-pull fulcrum; 127. Upper layer lower clamping member; 128. Swing pin shaft; 129. Self-lubricating wear-resistant bushing; 1210. Lower layer upper clamping member; 1211. Left half intermediate crossbeam section; 1212. Right half intermediate crossbeam section; 1213. First synchronous shaft; 1214. First synchronous shaft mounting seat; 1215. First synchronous gear; 1216. First synchronous rack; 1217. Lifting rod; 1218. Lower mounting seat of lifting rod; 1219. Upper mounting seat of lifting rod;

[0042] 13. Upper crossbeam assembly; 131. Upper crossbeam frame; 132. Upper layer upper clamping member; 133. Wear-resistant slider; 1341. Second synchronous shaft; 1342. Second synchronous shaft mounting seat; 1343. Second synchronous gear; 1344. Second synchronous rack; 1345. Rack mounting seat;

[0043] 14. Lower crossbeam lifting mechanism; 141. Screw jack; 142. Shaft rod; 143. Coupling; 144. Hydraulic motor; 145. Absolute encoder; 146. Jack base;

[0044] 2. Upper and lower roll system positioning device; 21. Operator side positioning component; 22. Drive side positioning component;

[0045] 3. Roll system device; 31. Straightening roll; 311. External spline structure; 312. Introduction section; 313. Head tooth groove; 314. Lateral outward inclination angle; 32. Backup roll; 33. Upper roll system; 34. Lower roll system; 35. Upper roll box; 36. Lower roll box; 37. Straightening roll bearing seat; 38. Roll changing wheel;

[0046] 5. Housing; 51. Housing base; 52. Lower guide chute; 53. Upper guide chute;

[0047] 6. Upper roll system locking mechanism;

[0048] 7. Lower roll system lifting device;

[0049] 8. Main drive spindle; 81. Spline sleeve; 811. Lateral inward inclination angle; 82. Internal spline; 83. Positioning and locking section; 84. Positioning gland; 85. Cardan joint; 86. End tooth groove; 87. Upper layer drive main shaft; 88. Lower layer drive main shaft; 89. Connection section;

[0050] 9. Roll changing drive device; 91. Roll changing table frame; 92. Roll changing drive mechanism; 93. Traveling mechanism; 94. Connection mechanism;

[0051] 201. Upper movable crossbeam; 202. Roll gap adjusting mechanism; 203. Main speed reducer. Detailed implementation mode

[0052] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0053] An efficient roll changing system for a heavy and wide plate straightening machine includes a housing 5, a roll changing drive device 9, a main drive coupling shaft 8, and a coupling shaft adjusting mechanism 1. A roll system device 3 is provided inside the housing 5. The roll system device 3 includes straightening rolls 31. The roll changing drive device 9 is located on the operating side of the housing 5. The main drive coupling shaft 8 and the coupling shaft adjusting mechanism 1 are both located on the drive side of the housing 5. One end of the main drive coupling shaft 8 is connected to one end of the straightening roll 31. The other end of the main drive coupling shaft 8 is connected to a drive mechanism, and this drive mechanism can make the straightening roll 31 rotate through the main drive coupling shaft 8. The coupling shaft adjusting mechanism 1 can adjust the position of one end of the main drive coupling shaft 8 in the vertical direction, as Figures 1 to 3 shown.

[0054] The main inventive point of the efficient roll changing system for the heavy and wide plate straightening machine of the present invention lies in adding a coupling shaft adjusting mechanism 1. The coupling shaft adjusting mechanism 1 can automatically and precisely adjust the position of one end of the main drive coupling shaft 8 in the vertical direction, fix and precisely adjust the position of the main drive coupling shaft 8 during the roll changing operation, and can solve the problem of difficult roll alignment caused by the difference in roll diameters (straightening rolls 31 and backup rolls 32) between the new roll system device 3 and the old roll system device 3, thereby greatly improving the roll changing efficiency.

[0055] In this embodiment, the main drive coupling shaft 8 includes an upper drive main shaft 87 and a lower drive main shaft 88 arranged up and down. The coupling shaft adjusting mechanism 1 includes a lower crossbeam assembly 11, an intermediate crossbeam assembly 12, and an upper crossbeam assembly 13 arranged in sequence from bottom to top. The positions of the lower crossbeam assembly 11, the intermediate crossbeam assembly 12, and the upper crossbeam assembly 13 in the vertical direction can all be adjusted. The lower crossbeam assembly 11 and the intermediate crossbeam assembly 12 can clamp and fix the lower drive main shaft 88, and the intermediate crossbeam assembly 12 and the upper crossbeam assembly 13 can clamp and fix the upper drive main shaft 87, as Figure 2 and Figure 3 shown.

[0056] The roll system 3 includes multiple straightening rolls 31. The multiple straightening rolls 31 are divided into upper straightening rolls and lower straightening rolls arranged up and down. The upper straightening rolls are connected to the upper driving main shaft 87 in a one-to-one correspondence, and the lower straightening rolls are connected to the lower driving main shaft 88 in a one-to-one correspondence. By setting the lower crossbeam lifting mechanism 14, the overall position of the lower crossbeam assembly 11, the middle crossbeam assembly 12, and the upper crossbeam assembly 13 in the vertical direction can be adjusted. The positions of the lower crossbeam assembly 11, the middle crossbeam assembly 12, and the upper crossbeam assembly 13 relative to each other in the vertical direction can also be adjusted, enabling the position of the main drive coupling shaft 8 to be fixed and precisely adjusted during the roll changing operation.

[0057] In this embodiment, the lower crossbeam lifting mechanism 14 is located below the lower crossbeam assembly 11. The lower crossbeam assembly 11 includes a lower crossbeam frame 111. A plurality of lower clamping members 112 are provided on the upper surface of the lower crossbeam frame 111. The lower crossbeam lifting mechanism 14 includes a screw jack 141 and a shaft rod 142 connected in sequence. One end of the shaft rod 142 is connected to a hydraulic motor 144, and the other end of the shaft rod 142 is connected to an absolute encoder 145. The lifting screw rod of the screw jack 141 is connected to the lower crossbeam frame 111. The hydraulic motor 144 can drive the lower crossbeam assembly 11 to move in the vertical direction through the shaft rod 142 and the screw jack 141 in sequence, as Figure 3 shown.

[0058] The lower crossbeam frame 111 has a long strip structure. The length direction of the lower crossbeam frame 111 is the left-right direction. The plurality of lower clamping members 112 are arranged in the left-right direction (which is also the rolling line direction). The lower crossbeam lifting mechanism 14 includes a number of screw jacks 141. The number of screw jacks 141 is connected in series through the shaft rod 142 and a coupling 143. The absolute encoder 145 is a high-precision absolute encoder. The screw jack 141 is fixed on the side of the housing base 51 through a jack base 146. The lifting screw rod of the screw jack 141 is in an upright state. The high-efficiency roll changing system of this heavy plate straightening machine includes a control unit. Both the absolute encoder 145 and the hydraulic motor 144 are connected to this control unit.

[0059] The upper surface of the lower clamping member 112 is provided with an arc surface. The diameter corresponding to the arc surface of the lower clamping member 112 is the same as the outer diameter of the positioning and locking section 83 of the main drive coupling shaft 8 described below. The distance between the arc surfaces of adjacent lower clamping members 112 is equal to the distance between adjacent straightening rolls 31 (or spline sleeves 81) at the corresponding position. The bottom surface of the lower crossbeam frame 111 is connected to the lifting screw rod of the screw jack 141; Wear-resistant sliding blocks 113 for guiding are installed at both ends of the lower crossbeam frame 111. The wear-resistant sliding blocks 113 are arranged in the lower guiding chute 52 on the housing 5, as Figure 3 、 Figure 4 、 Figure 9 andFigure 10 as shown

[0060] The screw lift 141 is driven by a hydraulic motor 144 to realize the vertical lifting movement of the lower crossbeam assembly 11 (the intermediate crossbeam assembly 12 and the upper crossbeam assembly 13), so that the lower clamping member 112 fixed thereon can hold the spline sleeve 81 of the lower main transmission shaft 8, or release the spline sleeve 81, or adjust the height of the spline sleeve 81, etc.; the high-precision absolute encoder 145 is used to automatically position and detect the position of the lower crossbeam assembly 11, facilitating the precise positioning or adjustment of the vertical position of the spline sleeve 81.

[0061] In this embodiment, the intermediate crossbeam assembly 12 includes an intermediate crossbeam frame 121. A plurality of upper lower clamping members 127 are provided on the upper surface of the intermediate crossbeam frame 121, a plurality of lower upper clamping members 1210 are provided on the lower surface of the intermediate crossbeam frame 121, and lifting swing supports 123 are provided at both the left and right ends of the intermediate crossbeam frame 121. The lifting swing supports 123 are connected to the lower crossbeam frame 111 of the lower crossbeam assembly 11 through lower row hydraulic cylinders 125, and the lifting swing supports 123 are connected to the upper crossbeam frame 131 of the upper crossbeam assembly 13 through upper row hydraulic cylinders 124.

[0062] In this embodiment, the intermediate crossbeam frame 121 includes a left half intermediate crossbeam section 1211 and a right half intermediate crossbeam section 1212 arranged left and right. The left end of the left half intermediate crossbeam section 1211 is connected to the left lifting swing support 123 through a left swing pin 128. A left swing hydraulic cylinder 122 is connected to the left side of the lifting swing support 123. The left swing hydraulic cylinder 122 can drive the left half intermediate crossbeam section 1211 to rotate around the left swing pin 128. The right end of the right half intermediate crossbeam section 1212 is connected to the right lifting swing support 123 through a right swing pin 128. A right swing hydraulic cylinder 122 is connected to the right side of the lifting swing support 123. The right swing hydraulic cylinder 122 can drive the right half intermediate crossbeam section 1212 to rotate around the right swing pin 128. The left swing pin 128 and the right swing pin 128 are symmetric left and right and are mirror images of each other. Both the left swing pin 128 and the right swing pin 128 are in an upright state, as Figure 3 , Figure 6 and Figure 7 as shown

[0063] The intermediate crossbeam assembly 12 has functions of automatic lifting and swinging. The intermediate crossbeam assembly 12 is divided into left and right parts. Both the left and right parts contain an intermediate crossbeam frame 121, a swinging hydraulic cylinder 122, a lifting and swinging support 123, an upper row of hydraulic cylinders 124, and a lower row of hydraulic cylinders 125. The upper row of hydraulic cylinders 124 and the lower row of hydraulic cylinders 125 are both in an upright state. The spherical plain bearing at the lower end of the piston rod of the lower row of hydraulic cylinders 125 is fixed to the lower crossbeam frame 111 through a pin shaft. The telescopic movement of the piston rod of the lower row of hydraulic cylinders 125 can drive the intermediate crossbeam frame 121 to perform lifting movement in the vertical direction, so that the distance between the intermediate crossbeam frame 121 and the lower crossbeam frame 111 changes accordingly.

[0064] The top surface and the bottom surface of the lifting and swinging support 123 are respectively fixed with the upper row of hydraulic cylinders 124 and the lower row of hydraulic cylinders 125 through flanges; the swinging hydraulic cylinder 122 is fixed to the side surface of the lifting and swinging support 123 through an intermediate trunnion; the spherical plain bearing at the piston rod end of the swinging hydraulic cylinder 122 is connected to the push-pull fulcrum 126 of the intermediate crossbeam frame 121 (left half of the intermediate crossbeam section 1211 or right half of the intermediate crossbeam section 1212) through a pin shaft.

[0065] A plurality of upper-layer lower clamping members 127 are provided on the upper surface of the intermediate crossbeam frame 121. The plurality of upper-layer lower clamping members 127 are arranged in the left-right direction. A plurality of lower-layer upper clamping members 1210 are provided on the lower surface of the intermediate crossbeam frame 121. The plurality of lower-layer upper clamping members 1210 are arranged in the left-right direction. The upper surface of the upper-layer lower clamping member 127 is provided with an arc surface, and the lower surface of the lower-layer upper clamping member 1210 is provided with an arc surface. The diameter corresponding to the arc surfaces of the upper-layer lower clamping member 127 and the lower-layer upper clamping member 1210 is the same as the outer diameter of the positioning and locking section 83 of the main drive coupling shaft 8. The distance between adjacent arc surfaces is equal to the distance between adjacent straightening rollers 31 (or spline sleeves 81) at the corresponding positions.

[0066] A through hole for the rotation and swinging of the crossbeam section is designed at the left end of the left half of the intermediate crossbeam section 1211 (or the right end of the right half of the intermediate crossbeam section 1212). The swinging pin shaft 128 passes through this through hole and a self-lubricating wear-resistant bushing 129 is arranged between them. The two ends of the swinging pin shaft 128 are integrated with the lifting and swinging support 123; the telescopic movement of the piston rod of the swinging hydraulic cylinder 122 can drive the left half of the intermediate crossbeam section 1211 or the right half of the intermediate crossbeam section 1212 to rotate around the swinging pin shaft 128 in the horizontal direction, as Figure 7 and Figure 8 shown.

[0067] In this embodiment, a first synchronizing shaft 1213 is provided below the lower crossbeam assembly 11. The axis of the first synchronizing shaft 1213 is arranged in the left-right direction. The first synchronizing shaft 1213 is connected to the housing 5 through a first synchronizing shaft mounting seat 1214. First mechanical synchronizing mechanisms are connected to both the left and right ends of the first synchronizing shaft 1213. The first mechanical synchronizing mechanism includes a first synchronizing gear 1215, a first synchronizing rack 1216, and a first lifting rod 1217. The first synchronizing gear 1215 is fixedly sleeved outside the first synchronizing shaft 1213. The first synchronizing rack 1216 is fixed to the lower part of the first lifting rod 1217. The first synchronizing gear 1215 is meshed with the first synchronizing rack 1216. The lower end of the first lifting rod 1217 is connected to the housing 5 through a lower lifting rod mounting seat 1218. The upper end of the first lifting rod 1217 is fixedly connected to the lifting swing support 123 through an upper lifting rod mounting seat 1219.

[0068] The two first mechanical synchronizing mechanisms are respectively located on the inlet side and the outlet side of the high-efficiency roll-changing system of the heavy plate straightening machine. The first synchronizing shaft 1213 is horizontally fixed on the driving side of the housing 5 along the rolling line through a plurality of first synchronizing shaft mounting seats 1214. One first synchronizing gear 1215 is installed at each end of the first synchronizing shaft 1213, and the installation phase angles of the two first synchronizing gears 1215 on the first synchronizing shaft 1213 are exactly the same; the number of the first lifting rods 1217 is two, which are respectively vertically installed on the inlet side and the outlet side of the driving side of the housing 5 through a plurality of lower lifting rod mounting seats 1218. The lower lifting rod mounting seats 1218 do not limit the movement of the first lifting rod 1217 in the vertical direction but limit its rotation. The first synchronizing racks 1216 are installed at the lower ends of the first lifting rods 1217; the tops of the first lifting rods 1217 are completely constrained on the above-mentioned lifting swing support 123. The lifting of the lifting swing supports 123 on both sides will be completely synchronized through the first mechanical synchronizing mechanism, and the first lifting rod 1217 restricts the rotational movement of the lifting swing support 123 in the horizontal direction.

[0069] When the piston rod of the swing hydraulic cylinder 122 extends, the left half intermediate crossbeam section 1211 and the right half intermediate crossbeam section 1212 swing inward around the swing pin shaft 128. After reaching the position, they are combined into the intermediate crossbeam frame 121. The intermediate crossbeam frame 121 has a long strip structure. The length direction of the intermediate crossbeam frame 121 is the left-right direction. The intermediate crossbeam frame 121 is parallel to the rolling line. The intermediate crossbeam frame 121 is located between the spline sleeves 81 of the upper layer driving main shaft 87 and the lower layer driving main shaft 88; when the piston rod of the swing hydraulic cylinder 122 retracts, the left half intermediate crossbeam section 1211 and the right half intermediate crossbeam section 1212 swing outward around the swing pin shaft 128. After reaching the position, the left half intermediate crossbeam section 1211 and the right half intermediate crossbeam section 1212 are far away from the spline sleeve 81 of the main transmission coupling shaft 8.

[0070] The piston rod of the lower hydraulic cylinder 125 extends out, and the lifting and swinging support 123 moves upward together with the position of the middle beam frame 121, and the lower upper clamping member 1210 on the middle beam frame 121 can loosen the spline sleeve 81 of the lower main transmission connecting shaft 8; the piston rod of the lower hydraulic cylinder 125 retracts, and the lifting and swinging support 123 moves downward together with the middle beam frame 121, and the lower upper clamping member 1210 on the middle beam frame 121 can clamp the spline sleeve 81 of the lower main transmission connecting shaft 8; the actions of the two lower hydraulic cylinders 125 are synchronously extended and retracted under the action of the first mechanical synchronization mechanism.

[0071] In this embodiment, the upper crossbeam assembly 13 includes an upper crossbeam frame 131, a second synchronization shaft 1341 is provided above the upper crossbeam assembly 13, the axis of the second synchronization shaft 1341 is arranged along the left-right direction, the second synchronization shaft 1341 is connected to the upper crossbeam assembly 13 through a second synchronization shaft mounting seat 1342, and the left and right ends of the second synchronization shaft 1341 are connected to a second mechanical synchronization mechanism, the second mechanical synchronization mechanism includes a second synchronization gear 1343 and a second synchronization rack 1344, the second synchronization gear 1343 is fixedly sleeved outside the second synchronization shaft 1341, the second synchronization rack 1344 is connected to the upper part of the arch 5 through a rack mounting seat 1345, and the second synchronization gear 1343 is meshed with the second synchronization rack 1344, as shown in FIG. Figure 3 , Figure 5 and Figure 6 shown.

[0072] The upper crossbeam frame 131 is in the shape of an elongated strip, and the length direction of the upper crossbeam frame 131 is in the left-right direction. A plurality of upper clamping members 132 are arranged on the lower surface of the upper crossbeam frame 131, and the plurality of upper clamping members 132 are arranged in the left-right direction, that is, the plurality of upper clamping members 132 are arranged on the bottom surface of the upper crossbeam frame 131 along the rolling line direction; the spherical bearings at the piston rod ends of the upper row of hydraulic cylinders 124 are fixed to the two ends of the upper crossbeam frame 131 by pins, and the extension and retraction of the piston rods of the upper row of hydraulic cylinders 124 can drive the upper crossbeam assembly 13 to move in the vertical direction, thereby changing the distance between the upper crossbeam frame 131 and the middle crossbeam frame 121 accordingly; wear-resistant sliders 133 for guiding are installed on the left and right ends of the upper crossbeam frame 131, and the wear-resistant sliders 133 are placed in the upper guide grooves 53 on the archway 5.

[0073] The number of the upper row hydraulic cylinders 124 is two, which are respectively located at the entrance side and the exit side of the housing 5. The synchronous extension and retraction of the upper row hydraulic cylinders 124 are realized by the second mechanical synchronization mechanism to ensure the horizontal lifting of the upper crossbeam assembly 13. The second synchronization shaft 1341 is horizontally fixed on the upper crossbeam frame 131 along the rolling line direction through a plurality of second synchronization shaft mounting seats 1342. One second synchronization gear 1343 is installed at each of the left and right ends of the second synchronization shaft 1341, and the mounting phase angles of the two second synchronization gears 1343 on the second synchronization shaft 1341 are exactly the same; the second synchronization rack 1344 is installed and fixed on the driving side of the housing 5 through its support.

[0074] When the piston rods of the upper row hydraulic cylinders 124 extend, the position of the upper crossbeam frame 131 moves upward together with the piston rods, and the upper clamping member 132 installed on its bottom surface can loosen the positioning and locking section 83 of the main driving coupling shaft 8 of the upper row; when the piston rods of the upper row hydraulic cylinders 124 retract, the position of the upper crossbeam frame 131 moves downward together with the piston rods, and the upper clamping member 132 installed on its bottom surface can press the positioning and locking section 83 of the main driving coupling shaft 8 of the upper row; the actions of the two upper row hydraulic cylinders 124 synchronously extend and retract under the action of the second mechanical synchronization mechanism.

[0075] In this embodiment, the roll system device 3 includes an upper roll system 33 and a lower roll system 34 arranged up and down. There is an upper and lower roll system positioning device 2 between the upper roll system 33 and the lower roll system 34. The upper and lower roll system positioning device 2 includes an operator side positioning member 21 and a driving side positioning member 22. The operator side positioning member 21 is located on the operator side of the roll system device, and the driving side positioning member 22 is located on the driving side of the roll system device. The upper roll system 33 includes an upper roll box 35, the lower roll system 34 includes backup rolls 32 and a lower roll box 36, and the leveling rolls 31 are respectively located in the upper roll box 35 and the lower roll box 36. A plurality of roll changing wheels 38 are provided at the bottom of the lower roll box 36, and the plurality of roll changing wheels 38 are symmetrically arranged left and right.

[0076] The number of the roll changing wheels 38 is generally an even number. The roll changing wheels 38 are respectively arranged at the entrance side and the exit side of the lower roll system 34 and are symmetrically arranged along the center of the lower roll system 34. The arrangement positions of the roll changing wheels 38 correspond one by one to the positions of the lower roll system lifting device 7, as Figure 13 and Figure 14 shown. The operator side positioning member 21 and the driving side positioning member 22 are made of light alloy materials. The operator side positioning member 21 determines the relative positions of the upper roll system 33 in all directions relative to the lower roll system 34, and the function of the driving side positioning member 22 is only to support the self-weight of the upper roll system 33.

[0077] In this embodiment, an external spline structure 311 is provided on the outer surface of one end of the straightening roll 31. A lateral outward inclination angle 314 is provided at the end of the external spline structure 311. An introduction section 312 is provided on the outer side of one end of the straightening roll 31. The outer diameter of the introduction section 312 is smaller than that of the external spline structure 311. The axis of the introduction section 312 coincides with the axis of the external spline structure 311. A chamfer transition 315 of 15° - 25° is designed at the starting end of the introduction section 312. The straightening roll 31 uses the external spline structure 311 to transmit the straightening torque. The lateral outward inclination angle 314 is adopted at the head of the external spline structure 311 to increase the width of the tooth groove 313 at the head of the external spline.

[0078] In this embodiment, the main drive spindle 8 includes a positioning gland 84, a spline sleeve 81, a positioning and locking section 83, a crosshead 85, and a connection section 89 that are connected in sequence. An internal spline structure is provided on the inner surface of the spline sleeve 81. A lateral inward inclination angle 811 is provided at the entry section of the spline sleeve 81. The outer diameter of the positioning and locking section 83 is smaller than that of the spline sleeve 81, as Figure 9 and Figure 10 shown.

[0079] The positioning and locking section 83 of the main drive spindle 8 is located between the spline sleeve 81 and the crosshead 85, which can not only balance the weights of the spline sleeve 81 and the crosshead 85, but also improve the positioning accuracy. A positioning gland 84 with a hardened inner surface is provided at the outer end of the spline sleeve 81. The internal spline 82 of the spline sleeve 81 is designed with a very large lateral inclination angle at the entry end of the external spline structure 311 of the straightening roll, effectively increasing the width of the tooth groove 86 at the end of the internal spline.

[0080] In this embodiment, an upper movable crossbeam 201 is provided inside the upper part of the housing 5. The upper movable crossbeam 201 is connected to the housing 5 through a roll gap adjustment mechanism 202. An upper roll set locking mechanism 6 is provided on the upper movable crossbeam 201. A lower roll set lifting device 7 is provided inside the lower part of the housing 5. The upper roll set locking mechanism 6 has functions of automatic telescoping and automatic rotation, and is logically controlled by the position of the locking mechanism. The number of the upper roll set locking mechanisms 6 is generally an even number, and they are symmetrically arranged on the inlet and outlet sides of the heavy plate straightening machine.

[0081] In this embodiment, the lower roll set 34 of the roll set device 3 is seated on the housing base 51. The bottom surface of the lower roll box 36 abuts against the top surface of the housing base 51. The upper roll set 33 is fixed on the upper movable crossbeam 201 through the upper roll set locking mechanism 6. The top surface of the upper roll box 35 abuts against the bottom surface of the upper movable crossbeam 201. The upper roll set locking mechanism 6 is installed on the upper movable crossbeam 201 of the heavy plate straightening machine, and the upper movable crossbeam 201 is connected to the housing 5 through the roll gap adjustment mechanism 202.

[0082] One end of the main drive spindle 8 is connected to the straightening roll 31 through a spline pair. However, the main drive spindle and the straightening roll of the present invention can also adopt other well-known connection methods, such as flat head connection. The other end is connected to the output shaft of the main reducer 203 of the heavy plate straightening machine. A positioning and locking section 83 for accurate and reliable positioning is added to the main drive spindle 8; the upper and lower roll system positioning device 2 fixes the relative positions of the upper roll system 33 and the lower roll system 34 during the roll change operation, and eliminates the influence of the wear of the straightening roll 31 of the old lower roll system 34 on the positioning accuracy.

[0083] The lower roll system lifting device 7 is arranged below the lower roll system 34 and is installed on the housing base 51 of the housing; the roll change drive device 9 is installed on the operating side (front side) of the heavy plate straightening machine, including a roll change table frame 91 and a roll change drive mechanism 92. The roll change table frame 91 abuts against the housing base 51, and the top surface of the roll change table frame 91 is flush with the top surface of the housing base 51. The roll change drive mechanism 92 is a power source-driven traveling mechanism 93, and the traveling mechanism 93 is connected to the lower roll box 36 by a pin shaft or other means, as Figure 11 and Figure 12 shown. The drive mechanism, the main drive spindle 8 and the spindle adjustment mechanism 1 are all located on the drive side (rear side) of the housing 5, and the drive mechanism includes a motor and a main reducer 203.

[0084] The following introduces the roll change working process of the high-efficiency roll change system of the heavy plate straightening machine of the present invention.

[0085] 1. Steps for pulling out the old roll system device 3:

[0086] At this time, the housing 5 of the high-efficiency roll change system of the heavy plate straightening machine contains the old roll system device 3, that is, Figure 1 there is no roll system device 3 on the roll change drive device 9.

[0087] Step 1: Switch the high-efficiency roll change system of the heavy plate straightening machine to the "roll change mode" and start replacing the roll system device 3;

[0088] Step 2: Manually disassemble all connecting pipelines and the positioning pins of the lower roll system 34, connect the connecting pins of the lower roll system 34 and the roll change drive device 9, and place the upper and lower roll system positioning device 2 (the operating side positioning component 21 and the drive side positioning component 22) on the upper surface of the lower row straightening roll bearing block 37;

[0089] Step 3: The lower roll system lifting device 7 lifts the lower roll system 34 to the roll change position;

[0090] Step 4: The lower crossbeam lifting mechanism 14 raises the lower crossbeam assembly 11 to the roll changing position, and the lower clamping member 112 of the lower layer can just support the positioning and locking section 83 of the lower row of the main drive spindle 8. At this time, the height position H of the spline sleeve 81 of the lower row of the main drive spindle 8 is detected by the high-precision absolute encoder 145 1 and stored in the control unit;

[0091] Step 5: The piston rod of the swing hydraulic cylinder 122 extends, driving the left half intermediate crossbeam section 1211 and the right half intermediate crossbeam section 1212 to swing inward, and stops after reaching the position;

[0092] Step 6: The piston rod of the lower row hydraulic cylinder 125 retracts, driving the intermediate crossbeam frame 121 to move downward until the upper layer lower clamping member 127 presses the positioning and locking section 83 of the lower row of the main drive spindle 8;

[0093] Step 7: The roll gap adjusting mechanism 202 lowers the upper roll set 33, and the upper straightening roll bearing block 37 lands on the upper and lower roll set positioning device 2;

[0094] Step 8: The upper roll set locking mechanism 6 is loosened, and the upper roll set 33 is disengaged from the upper movable crossbeam 201;

[0095] Step 9: The roll gap adjusting mechanism 202 raises the upper movable crossbeam 201 to the upper limit position;

[0096] Step 10: The piston rod of the upper row hydraulic cylinder 124 retracts, driving the upper crossbeam assembly 13 to move downward until the upper layer upper clamping member 132 presses the positioning and locking section 83 of the upper row of the main drive spindle 8;

[0097] Step 11: The roll changing drive device 9 pulls out the old roll set device 3 and hoists it to the maintenance position from the roll changing table 91 by a crane.

[0098] 2. Steps for pushing in the new roll set device 3:

[0099] At this time, there is no roll set device 3 in the housing 5 of the high-efficiency roll changing system for heavy plate straightening machines, that is Figure 1 there is no roll set device 3 on the roll changing drive device 9 and in the housing 5 of the high-efficiency roll changing system for heavy plate straightening machines.

[0100] Step 1: Input the diameters of the straightening rolls 31 and the backup rolls 32 of the new roll set device 3 on the HMI of the control unit, and the program in the control unit automatically calculates the height H of the lower row of the straightening rolls 31 of the new roll set device 3 2 and automatically calculates the difference: Δ = H 2 - H 1 , and automatically adjusts the height position H of the spline sleeve 81 through the lower crossbeam lifting mechanism 14 1 to H′1 such that Δ’ = H 2 - H′ 1 = 0;

[0101] Step 2: Lift the new roll system device 3 onto the roll changing bench 91, and manually connect the connecting pin between the lower roll system 34 and the roll changing drive device 9;

[0102] Step 3: Push the roll changing drive device 9 into the roll system device 3, that is, the roll changing drive device 9 pushes the new roll system device 3 into the housing 5;

[0103] Step 4: The piston rod of the upper row of hydraulic cylinders 124 extends, driving the upper crossbeam assembly 13 to move upward to the limit position, and the upper clamping member 132 on the upper layer releases the positioning and locking section 83 of the main drive coupling shaft 8 in the upper row;

[0104] Step 5: Lower the upper movable crossbeam 201 by the roll gap adjusting mechanism 202 until the bottom surface of the upper movable crossbeam 201 is about 1 mm - 5 mm away from the top surface of the upper roll system 33;

[0105] Step 6: The upper roll system locking mechanism 6 locks the upper roll system 33, connecting the upper roll system 33 and the upper movable crossbeam 201 as a whole;

[0106] Step 7: Lift the upper roll system 33 by the roll gap adjusting mechanism 202, and the upper straightening roll bearing block 37 is separated from the upper and lower roll system positioning device 2;

[0107] Step 8: The piston rod of the lower row of hydraulic cylinders 125 extends, driving the intermediate crossbeam frame 121 to move upward, and the lower clamping member 127 on the upper layer releases the positioning and locking section 83 of the main drive coupling shaft 8 in the lower row;

[0108] Step 9: The piston rod of the swing hydraulic cylinder 122 retracts, driving the left half intermediate crossbeam section 1211 and the right half intermediate crossbeam section 1212 to swing outward to the limit position;

[0109] Step 10: The lower crossbeam lifting mechanism 14 adjusts the lower crossbeam assembly 11 to the lower limit position, and the lower clamping member 112 on the lower layer disengages from the positioning and locking section 83 of the main drive coupling shaft 8 in the lower row.

[0110] Step 11: The lower roll system lifting device 7 lowers the lower roll system 34 to the working position;

[0111] Step 12: Manually connect all connecting pipelines and the positioning pins of the lower roll system 34, disconnect the connecting pin between the lower roll system 34 and the roll changing drive device 9, and remove the upper and lower roll system positioning device 2 (the operating side positioning component 21 and the drive side positioning component 22) placed on the upper straightening roll bearing block 37;

[0112] Step 13: Complete the calibration of the straightening roll gap;

[0113] Step 14: Switch the high-efficiency roll changing system of the wide and thick plate straightening machine to the "operation mode" and the roll changing is completed.

[0114] In summary, the shaft adjustment mechanism 1 of the present invention can quickly and accurately fix and precisely adjust the position of the main transmission shaft 8, and accurately locate and detect the position of the lower crossbeam assembly 11 in the vertical direction through the high-precision absolute encoder 145. The control program automatically calculates the height value of the lower row of straightening rollers 31 of the new roller system device 3, and eliminates the influence of the roller diameter difference between the new roller system device 3 and the old roller system device 3 on the roller changing rhythm by automatically adjusting the height of the lower crossbeam assembly 11.

[0115] The intermediate beam assembly 12 of the shaft connection adjustment mechanism 1 of the present invention has the functions of automatic lifting and automatic swinging, which solves the problem of incoordination between the intermediate beam frame 121 and the swing mechanism due to the height change. The mechanical synchronization mechanism makes the intermediate beam frame always at the same height, and the locking force of each main transmission shaft in the lower row is basically uniform.

[0116] The upper roller system locking mechanism 6 of the present invention has the functions of automatic extension and rotation, and can quickly lock and release the upper roller system 33. It is simple and convenient to operate, and can reliably ensure the safety of the straightening machine maintenance personnel. The present invention optimizes the structure of the transmission external spline structure 311 of the straightening roller 31 and the main transmission connecting shaft 8, and can smoothly introduce the spline pair when replacing the roller system without manual assistance, saving manual assistance time, improving the roller replacement efficiency, and avoiding errors caused by abnormal rotation of the straightening roller, making the entire roller replacement process simple and fast, greatly improving production efficiency.

[0117] In order to facilitate understanding and description, the present invention adopts the method of combining absolute position relationship to express, wherein the directional word "up" means Figure 2 The upward direction in the Figure 2 The lower direction in the “left” indicates Figure 2 The left direction in the Figure 2 The right direction in the figure is "front" which means perpendicular to Figure 2 The back refers to the direction perpendicular to the paper surface and points to the inside of the paper surface. Figure 2 The present invention is described using the reader's observation perspective, but the above-mentioned directional words cannot be understood or interpreted as limiting the protection scope of the present invention.

[0118] As described above, the foregoing are only specific embodiments of the present invention, and the scope of implementation of the invention cannot be limited thereby. Therefore, the replacement of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of the present invention shall still fall within the scope covered by this patent. In addition, the technical features in the present invention, between technical features, between technical features and technical solutions, and between technical solutions can be freely combined and used.

Claims

1. An efficient roll changing system for a heavy plate straightening machine, characterized in that, the efficient roll changing system for the heavy plate straightening machine includes a housing (5), a roll changing drive device (9), a main drive spindle (8) and a spindle adjustment mechanism (1). A roll system device (3) is arranged in the housing (5). The roll system device (3) includes straightening rolls (31). The roll changing drive device (9) is located on the operating side of the housing (5). The main drive spindle (8) and the spindle adjustment mechanism (1) are both located on the drive side of the housing (5). One end of the main drive spindle (8) is connected to one end of the straightening roll (31), and the other end of the main drive spindle (8) is connected to a drive mechanism. The spindle adjustment mechanism (1) can adjust the position of one end of the main drive spindle (8) in the vertical direction; the main drive spindle (8) includes an upper drive main shaft (87) and a lower drive main shaft (88) arranged up and down. The spindle adjustment mechanism (1) includes a lower crossbeam assembly (11), an intermediate crossbeam assembly (12) and an upper crossbeam assembly (13) arranged in sequence from bottom to top. The positions of the lower crossbeam assembly (11), the intermediate crossbeam assembly (12) and the upper crossbeam assembly (13) in the vertical direction can all be adjusted. The lower crossbeam assembly (11) and the intermediate crossbeam assembly (12) can clamp and fix the lower drive main shaft (88), and the intermediate crossbeam assembly (12) and the upper crossbeam assembly (13) can clamp and fix the upper drive main shaft (87); the intermediate crossbeam assembly (12) includes an intermediate crossbeam frame (121). An upper lower clamping member (127) is arranged on the upper surface of the intermediate crossbeam frame (121), and a lower upper clamping member (1210) is arranged on the lower surface of the intermediate crossbeam frame (121). Lifting and swinging supports (123) are arranged at both the left and right ends of the intermediate crossbeam frame (121). The lifting and swinging supports (123) are connected to the lower crossbeam assembly (11) through lower row hydraulic cylinders (125), and the lifting and swinging supports (123) are connected to the upper crossbeam assembly (13) through upper row hydraulic cylinders (124); the intermediate crossbeam frame (121) includes a left half intermediate crossbeam section (1211) and a right half intermediate crossbeam section (1212) arranged left and right. The left end of the left half intermediate crossbeam section (1211) is connected to the left lifting and swinging support (123) through a left swinging pin shaft (128). A left swinging hydraulic cylinder (122) is connected to the left side of the lifting and swinging support (123). The left swinging hydraulic cylinder (122) can drive the left half intermediate crossbeam section (1211) to rotate around the left swinging pin shaft (128). The right end of the right half intermediate crossbeam section (1212) is connected to the right lifting and swinging support (123) through a right swinging pin shaft (128). A right swinging hydraulic cylinder (122) is connected to the right side of the lifting and swinging support (123). The right swinging hydraulic cylinder (122) can drive the right half intermediate crossbeam section (1212) to rotate around the right swinging pin shaft (128). Both the left swinging pin shaft (128) and the right swinging pin shaft (128) are in an upright state.

2. The efficient roll changing system for a heavy plate straightening machine according to claim 1, characterized in that, A lower crossbeam lifting mechanism (14) is provided below the lower crossbeam assembly (11). The lower crossbeam assembly (11) includes a lower crossbeam frame (111). A lower layer lower clamping member (112) is provided on the upper surface of the lower crossbeam frame (111). The lower crossbeam lifting mechanism (14) includes a screw lift (141) and a shaft rod (142) connected in sequence. One end of the shaft rod (142) is connected with a hydraulic motor (144), and the other end of the shaft rod (142) is connected with an absolute encoder (145). The lifting screw rod of the screw lift (141) is connected with the lower crossbeam frame (111). The hydraulic motor (144) can drive the lower crossbeam assembly (11) to move in the vertical direction through the shaft rod (142) and the screw lift (141) in sequence.

3. The high-efficiency roll-changing system of a heavy plate straightening machine according to claim 1, characterized in that, a first synchronous shaft (1213) is provided below the lower crossbeam assembly (11). The axis of the first synchronous shaft (1213) is arranged in the left-right direction. The first synchronous shaft (1213) is connected with the housing (5) through a first synchronous shaft mounting seat (1214). Both the left and right ends of the first synchronous shaft (1213) are connected with a first mechanical synchronization mechanism. The first mechanical synchronization mechanism includes a first synchronous gear (1215), a first synchronous rack (1216) and a first lifting rod (1217). The first synchronous gear (1215) is fixedly sleeved outside the first synchronous shaft (1213). The first synchronous rack (1216) is fixed to the lower part of the first lifting rod (1217). The first synchronous gear (1215) meshes with the first synchronous rack (1216). The lower end of the first lifting rod (1217) is connected with the housing (5) through a lower mounting seat of the lifting rod (1218). The upper end of the first lifting rod (1217) is fixedly connected with the lifting swing support (123) through an upper mounting seat of the lifting rod (1219).

4. The high-efficiency roll-changing system of a heavy plate straightening machine according to claim 1, characterized in that, the upper crossbeam assembly (13) includes an upper crossbeam frame (131). A second synchronous shaft (1341) is provided above the upper crossbeam assembly (13). The axis of the second synchronous shaft (1341) is arranged in the left-right direction. The second synchronous shaft (1341) is connected with the upper crossbeam assembly (13) through a second synchronous shaft mounting seat (1342). Both the left and right ends of the second synchronous shaft (1341) are connected with a second mechanical synchronization mechanism. The second mechanical synchronization mechanism includes a second synchronous gear (1343) and a second synchronous rack (1344). The second synchronous gear (1343) is fixedly sleeved outside the second synchronous shaft (1341). The second synchronous rack (1344) is connected with the upper part of the housing (5) through a rack mounting seat (1345). The second synchronous gear (1343) meshes with the second synchronous rack (1344).

5. The high-efficiency roll-changing system of a heavy plate straightening machine according to claim 1, characterized in that, The roll system device (3) includes an upper roll system (33) and a lower roll system (34) arranged vertically. There is an upper and lower roll system positioning device (2) between the upper roll system (33) and the lower roll system (34). The upper and lower roll system positioning device (2) includes an operator side positioning component (21) and a drive side positioning component (22). The operator side positioning component (21) is located on the operator side of the roll system device (3), and the drive side positioning component (22) is located on the drive side of the roll system device (3). The upper roll system (33) includes an upper roll box (35), and the lower roll system (34) includes backup rolls (32) and a lower roll box (36). The leveling rolls (31) are located within the upper roll box (35) and the lower roll box (36). Multiple roll changing wheels (38) are provided at the bottom of the lower roll box (36), and the multiple roll changing wheels (38) are symmetrically arranged left and right.

6. The high-efficiency roll changing system for a heavy plate leveling machine according to claim 1, characterized in that, The outer surface of one end of the leveling roll (31) is provided with an external spline structure (311). The end of the external spline structure (311) is provided with a lateral outward inclination angle (314). An introduction section (312) is provided on the outside of one end of the leveling roll (31). The outer diameter of the introduction section (312) is smaller than the outer diameter of the external spline structure (311). The axis of the introduction section (312) coincides with the axis of the external spline structure (311). A chamfer transition (315) of 15° - 25° is designed at the starting end of the introduction section (312).

7. The high-efficiency roll changing system for a heavy plate leveling machine according to claim 1, characterized in that, The main drive spindle (8) includes a positioning gland (84), a spline sleeve (81), a positioning and locking section (83), a crosshead (85), and a connection section (89) connected in sequence. The inner surface of the spline sleeve (81) is provided with an internal spline structure. The entry section of the spline sleeve (81) is provided with a lateral inward inclination angle (811). The outer diameter of the positioning and locking section (83) is smaller than the outer diameter of the spline sleeve (81).

8. The high-efficiency roll changing system for a heavy plate leveling machine according to claim 1, characterized in that, An upper movable crossbeam (201) is provided inside the upper part of the housing (5). The upper movable crossbeam (201) is connected to the housing (5) through a roll gap adjustment mechanism (202). An upper roll system locking mechanism (6) is provided on the upper movable crossbeam (201). A lower roll system lifting device (7) is provided inside the lower part of the housing (5).

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