A seven-roller straightening machine

Abstract

A seven-roller straightening machine is used for strip steel production in the metallurgical industry. The front ends of the upper frame are connected to the inlet eccentric shaft on the lower frame by oil cylinders, and the rear ends of the upper frame are connected to the outlet eccentric shaft on the lower frame by swing frames. The reduction motor of the present invention is directly connected to the inlet eccentric shaft and the outlet eccentric shaft respectively, and directly drives the inlet eccentric shaft and the outlet eccentric shaft to adjust the pressure of the upper straightening roller. The encoder can directly detect the rotation angle of the eccentric shaft. According to the center distance between the eccentric shaft and the eccentric shaft neck, multiplied by the sine function of the rotation angle of the eccentric shaft, the electrical control system can obtain the precise pressure value in real time. Each upper straightening roller does not need to be adjusted accordingly, and can provide the upper straightening roller with a precise pressure to eliminate the warping of the strip head; the hinged upper frame structure can be quickly opened and closed by the oil cylinder to facilitate the subsequent strip threading and the straightening machine overhaul. The structure is simple, the degree of automation and production efficiency are very high, and the overhaul and maintenance are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of strip steel production in the metallurgical industry, in particular to a seven-roller straightening machine. Background Art

[0002] The seven-roller straightening machine is one of the important equipment in the cold rolling, galvanizing and continuous annealing production lines of strip steel. It is used to ensure the smooth unwinding of the steel coil and to straighten the head and tail of the steel coil to facilitate the subsequent strip threading of the steel coil. When the unwinding is almost finished, the seven-roller straightening machine is operated to straighten the tail of the steel coil to prevent the tail of the plate from hitting and damaging the equipment. The existing seven-roller straightening machine uses a lift to adjust the pressing amount of the upper straightening roller, and uses a cylinder to drive the lower straightening roller to rise and fall quickly. Each upper straightening roller needs to be equipped with two worm screw lifts, a reduction motor and two couplings. The processing and assembly are very difficult and the manufacturing cost is high. According to the different incoming material thickness and plate shape, each upper straightening roller must be adjusted accordingly. The electronic control is complicated, the operation is cumbersome, and the production efficiency is low. During maintenance, if the straightening roller is replaced, the seven-roller straightening machine needs to be disassembled to remove the straightening roller. The downtime is very long, which seriously affects the production efficiency. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a seven-roller straightening machine so that the upper straightening roller can adjust its posture as a whole and can be opened quickly, making maintenance very convenient and quick.

[0004] To achieve the above-mentioned purpose of the invention, the present invention includes a main machine and a transmission device; the front ends of the upper frame are connected to the inlet eccentric shaft on the lower frame through the oil cylinder, and the rear ends of the upper frame are connected to the outlet eccentric shaft on the lower frame through the swing frame; the piston rod of the oil cylinder is controlled to be extended and retracted, so that the upper frame can be quickly opened and closed, and the reduction motor drives the inlet eccentric shaft and the outlet eccentric shaft to rotate, so that the pressing amount of the upper frame and the upper straightening roller can be adjusted.

[0005] The upper frame is provided with three upper straightening rollers, each of which has bearing seats on both sides, each of which is fixed to the upper bottom plate of the upper frame with screws, and safety brackets are provided on both sides of the rear end of the upper frame; the lower frame is provided with four lower straightening rollers, each of which has bearing seats on both sides, each of which is fixed to the lower bottom plate of the lower frame with screws, and safety pins are provided on both sides of the rear end of the lower frame, and the guide plate is fixed to the front end of the lower frame; the transmission shaft of the reduction motor adopts a semi-hollow shaft, the input end and the output end of the inlet eccentric shaft are provided with eccentric shaft necks, and the eccentric shaft necks are provided with copper sleeves, the piston rod end of the oil cylinder is connected to the connecting seat, and the connecting seat and the base are connected with a Bolts are connected to the outer circle of the copper sleeve, the cylinder end of the oil cylinder is hinged to the ears on both sides of the upper frame, the input end of the inlet eccentric shaft is sleeved on the inner side of the semi-empty shaft of the reduction motor, and the input shaft of the encoder is sleeved on the outer side of the semi-empty shaft of the reduction motor; the input end and the output end of the outlet eccentric shaft are provided with eccentric shaft necks, and the eccentric shaft necks are provided with copper sleeves, the ears of the connecting rod are hinged to one end of the swing frame on both sides of the upper frame, the connecting rod and the base are connected to the outer circle of the copper sleeve with bolts, the input end of the outlet eccentric shaft is sleeved on the inner side of the semi-empty shaft of the reduction motor, the input shaft of the encoder is sleeved on the outer side of the semi-empty shaft of the reduction motor, and the other end of the swing frame on both sides of the upper frame is hinged to the ears on both sides of the lower frame.

[0006] The transmission device is fixed on the base, and the main motor is connected with the upper straightening roller and the lower straightening roller via a coupling, a gear distribution box and a universal coupling.

[0007] Compared with the prior art, the most obvious feature of the present invention is that the original worm screw lift and coupling on the main machine are cancelled, and the reduction motor is directly connected to the inlet eccentric shaft and the outlet eccentric shaft respectively, and the inlet eccentric shaft and the outlet eccentric shaft are directly driven to adjust the pressing amount of the upper straightening roller. The encoder can directly detect the rotation angle of the eccentric shaft. According to the center distance between the eccentric shaft and the eccentric shaft neck, multiplied by the sine function of the rotation angle of the eccentric shaft, the electrical control system can obtain the accurate pressing amount value in real time. Each upper straightening roller does not need to be adjusted accordingly, and can provide the upper straightening roller with accurate pressing amount to eliminate the upward warping of the strip head; the hinged upper frame structure can be quickly opened and closed by the oil cylinder to help the subsequent strip threading to proceed smoothly, and the piston rod of the oil cylinder can be controlled to extend, and the upper frame can be opened at an angle of more than 90°, so that the straightening roller and other components can be replaced or repaired, and the inspection and maintenance are more convenient and quick. The structure is simple, and the degree of automation and production efficiency are very high. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural diagram of the present invention.

[0009] Figure 2 yes Figure 1 Maintenance diagram of .

[0010] Figure 3 yes Figure 1Schematic diagram of the upper frame attitude adjustment mechanism structure.

[0011] Figure 4 yes Figure 3 Cross-sectional view of the outlet eccentric shaft portion.

[0012] Figure 5 yes Figure 3 Cross-sectional view of the inlet eccentric shaft portion. DETAILED DESCRIPTION

[0013] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the present invention mainly includes a main machine 19 and a transmission device 18. The front ends of the upper frame 5 are connected to the inlet eccentric shaft 2 on the lower frame 10 through the oil cylinder 3, and the rear ends of the upper frame 5 are connected to the outlet eccentric shaft 9 on the lower frame 10 through the swing frame 8; the piston rod of the oil cylinder 3 is controlled to be extended and retracted, so that the upper frame 5 can be quickly opened and closed, and the reduction motor 16 drives the inlet eccentric shaft 2 and the outlet eccentric shaft 9 to rotate, so that the pressing amount of the upper frame 5 and the upper straightening roller 4 can be adjusted.

[0014] The upper frame 5 is provided with three upper straightening rollers 4, each of which has bearing seats 27 on both sides, and each bearing seat 27 is fixed to the upper bottom plate of the upper frame 5 with screws, and safety brackets 6 are provided on both sides of the rear end of the upper frame 5; the lower frame 10 is provided with four lower straightening rollers 29, each of which has bearing seats 27 on both sides, and each bearing seat 27 is fixed to the lower bottom plate of the lower frame 10 with screws, and safety pins 7 are provided on both sides of the rear end of the lower frame 10, and the guide plate 17 is fixed to the front end of the lower frame 10; the transmission shaft of the reduction motor 16 adopts a semi-hollow shaft 21, and the input end 22 and the output end of the inlet eccentric shaft 2 are provided with an eccentric journal 23, and the eccentric journal 23 is provided with a copper sleeve 24, and the piston rod end of the oil cylinder 3 is connected to the connecting seat 20, and the connecting seat 20 and the base 30 are bolted to the copper sleeve 2 4, the cylinder end of the oil cylinder 3 is hinged with the ears 31 on both sides of the upper frame 5, the input end 22 of the inlet eccentric shaft 2 is sleeved on the inner side of the semi-empty shaft 21 of the reduction motor 16, and the input shaft 26 of the encoder 25 is sleeved on the outer side of the semi-empty shaft 21 of the reduction motor 16; the input end 22 and the output end of the outlet eccentric shaft 9 are provided with an eccentric journal 23, and the eccentric journal 23 is provided with a copper sleeve 24, the ear of the connecting rod 28 is hinged with one end of the swing frame 8 on both sides of the upper frame 5, the connecting rod 28 and the base 30 are bolted to the outer circle of the copper sleeve 24, the input end 22 of the outlet eccentric shaft 9 is sleeved on the inner side of the semi-empty shaft 21 of the reduction motor 16, the input shaft 26 of the encoder 25 is sleeved on the outer side of the semi-empty shaft 21 of the reduction motor 16, and the other end of the swing frame 8 on both sides of the upper frame 5 is hinged with the ears 32 on both sides of the lower frame 10.

[0015] The transmission device 18 is fixed on the base 8, and the main motor 12 is connected to the upper straightening roller 4 and the lower straightening roller 29 via the coupling 13, the gear distribution box 14 and the universal coupling 15.

[0016] like Figure 2 As shown, during maintenance, the piston rod of the control cylinder 3 is extended, the upper frame 5 is opened at an angle exceeding 90°, the safety pin 7 and the safety bracket 6 lock the upper frame 5 and the lower frame 10, and the straightening roller and other components can be replaced or repaired. The degree of automation and efficiency are very high, and maintenance is convenient and fast.

[0017] like Figure 3 , Figure 4 , Figure 5 As shown, the piston rod of the oil cylinder 3 is controlled to be extended and retracted, and the oil cylinder 3 can quickly open and close the upper frame 5. The reduction motor 16 is directly connected to the inlet eccentric shaft 2 and the outlet eccentric shaft 9 respectively, and directly drives the inlet eccentric shaft 2 and the outlet eccentric shaft 9, so as to adjust the pressing amount of the upper straightening roller 4. The encoder 25 can directly detect the rotation angle of the eccentric shaft. According to the center distance between the eccentric shaft and the eccentric shaft neck, multiplied by the sine function of the rotation angle of the eccentric shaft, the electrical control system can obtain the accurate pressing amount value in real time. Each upper straightening roller 4 does not need to be adjusted accordingly, and the pressing posture adjustment of the upper frame 5 and the upper straightening roller 4 can be achieved, providing the upper straightening roller 4 with accurate pressing amount to eliminate the warping of the strip head.

[0018] The working process of the present invention is as follows:

[0019] When working, the oil cylinder 3 pushes the upper frame 5 to open quickly, and the head of the strip enters the lower frame 10 through the guide plate 17. The oil cylinder 3 then pulls the upper frame 5 to reset, and the reduction motor 16 drives the inlet eccentric shaft 2 and the outlet eccentric shaft 9 to provide a certain amount of pressure to eliminate the upward warping of the strip head, so as to help the subsequent strip threading to proceed smoothly.

Claims

1. A seven-roller straightening machine, characterized in that: The machine comprises a main machine (19) and a transmission device (18); the front ends of the upper frame (5) are connected to the inlet eccentric shaft (2) on the lower frame (10) via the oil cylinder (3); the rear ends of the upper frame (5) are connected to the outlet eccentric shaft (9) on the lower frame (10) via the swing frame (8); the piston rod of the oil cylinder (3) is controlled to extend and retract, so that the upper frame (5) can be quickly opened and closed, and the reduction motor (16) drives the inlet eccentric shaft (2) and the outlet eccentric shaft (9) to rotate, so that the pressing amount of the upper frame (5) and the upper straightening roller (4) can be adjusted; The upper frame (5) is provided with three upper straightening rollers (4), each of which has bearing seats (27) on both sides, each of which is fixed to the upper bottom plate of the upper frame (5) by screws, and safety brackets (6) are provided on both sides of the rear end of the upper frame (5); the lower frame (10) is provided with four lower straightening rollers (29), each of which has bearing seats (27) on both sides, each of which is fixed to the lower bottom plate of the lower frame (10) by screws, and safety pins (7) are provided on both sides of the rear end of the lower frame (10), and the guide plate (17) is fixed to the lower frame. (10); the transmission shaft of the reduction motor (16) adopts a semi-hollow shaft (21); the input end (22) and the output end of the inlet eccentric shaft (2) are provided with an eccentric journal (23); the eccentric journal (23) is provided with a copper sleeve (24); the piston rod end of the oil cylinder (3) is connected to the connecting seat (20); the connecting seat (20) and the base (30) are connected to the outer circle of the copper sleeve (24) by bolts; the cylinder end of the oil cylinder (3) is hinged with the ears (31) on both sides of the upper frame (5); the input end (22) of the inlet eccentric shaft (2) is sleeved on the inner side of the semi-hollow shaft (21) of the reduction motor (16); the coding The input shaft (26) of the encoder (25) is sleeved on the outside of the semi-hollow shaft (21) of the reduction motor (16); the input end (22) and the output end of the outlet eccentric shaft (9) are provided with an eccentric journal (23), and the eccentric journal (23) is provided with a copper sleeve (24); the ear of the connecting rod (28) is hinged with one end of the swing frame (8) on both sides of the upper frame (5); the connecting rod (28) and the base (30) are connected to the outer circle of the copper sleeve (24) by bolts; the input end (22) of the outlet eccentric shaft (9) is sleeved on the inside of the semi-hollow shaft (21) of the reduction motor (16); the input shaft (26) of the encoder (25) is sleeved On the outside of the semi-hollow shaft (21) of the reduction motor (16), the other ends of the swing frames (8) on both sides of the upper frame (5) are hinged to the ears (32) on both sides of the lower frame (10); the encoder (25) can directly detect the rotation angle of the eccentric shaft, and the electrical control system can obtain the precise value of the pressing amount in real time according to the center distance between the eccentric shaft and the eccentric shaft neck multiplied by the sine function of the rotation angle of the eccentric shaft; each upper straightening roller (4) does not need to be adjusted accordingly, and the pressing posture of the upper frame (5) and the upper straightening roller (4) can be adjusted, providing the upper straightening roller (4) with a precise pressing amount to eliminate the upward warping of the strip head; The transmission device (18) is fixed on the base (30), and the main motor (12) is connected to the upper straightening roller (4) and the lower straightening roller (29) via a coupling (13), a gear distribution box (14), and a universal coupling (15); During operation, the oil cylinder (3) pushes the upper frame (5) to open quickly, and the head of the strip enters the lower frame (10) through the guide plate (17). The oil cylinder (3) then pulls the upper frame (5) to reset, and the reduction motor (16) drives the inlet eccentric shaft (2) and the outlet eccentric shaft (9) to provide a certain amount of pressure to eliminate the upward warping of the strip head, so as to facilitate the subsequent strip threading.

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