CN104307929B - Cantilevered parallel rollers roller replacing device for straightening machine - Google Patents

Abstract

The present invention is applicable to steel rolling aligning field, a kind of cantilevered parallel rollers roller replacing device for straightening machine is provided, described device includes that track frame, drive mechanism and roll changing carriage, described roll changing carriage are provided with bracket elevating mechanism, and described roll changing carriage is moved on described track frame by described drive mechanism.Apparatus of the present invention can realize the how secondary roller shells on bracket and smoothing roll centering the most simultaneously, roller replacing mode simple and fast, is also applied for the distance of roll changing carriage and crosses inter-bank and sail roll change.

Description

Cantilever type parallel roll leveler roll changing device

technical field

The invention belongs to the field of steel rolling and straightening, in particular to a roll changing device for a cantilever type parallel roll leveler.

Background technique

Straightening technology is mostly used in the post-process of metal strip processing, which largely determines the quality level of production and finished products. In the production of the straightening machine, the straightening rollers need to be replaced frequently due to the replacement of product specifications or the wear of the roller ring. In order to improve the straightening quality, the cantilever type parallel roller straightening machine is designed with a large number of straightening rollers. In the initial design, the parallel roll leveler is designed to be at least five rolls, and now the number of rolls of the cantilever parallel roll leveler is usually nine rolls or ten rolls, or even more. In order to improve production efficiency and reduce roll changing time, it is required that straightening rolls be changed at the same time. When changing rolls, the roller rings are installed on the roller sleeves, and each auxiliary roller sleeve is assembled with a bracket. The roll sleeves are pushed onto the straightening rolls.

Multiple sets of roll sleeves are pulled out and installed from the straightening roller at the same time, which greatly increases the difficulty of centering between the roll sleeve and the straightening roll. If the position of any roll sleeve in any direction exceeds the tolerance range, it will be impossible to achieve simultaneous Change the roll. In order to achieve accurate alignment of the roller ring and the straightening roller, one of the existing solutions is to design the mating surface of the straightening roller and the roller sleeve as a tapered surface, and reduce the difficulty of aligning multiple pairs of roller rings through the introduction of the tapered surface . The other is to use a pair of long guide rods to push the frame to move, and use a sliding sleeve to limit the gap between the guide rods to guide it, so as to realize the accurate alignment of the roller sleeve and the straightening roller. The mating surface of the straightening roller and the roller sleeve is designed as a tapered surface, which reduces the difficulty of aligning the roller sleeve and the straightening roller, but reduces the strength of the straightening roller, so it is necessary to increase the straightening roller under the same working conditions diameter to increase its strength. Guided by the guide rod and pushed to move the bracket, the manufacturing and installation requirements for the guide rod are extremely high, and it is difficult to adjust if there is a gap after use; and limited by the length of the guide rod, the stroke of the roller changer is limited, such as increasing the roll change The stroke of the car will inevitably increase the length of the guide rod, which not only increases the difficulty of manufacturing and installation, but also increases the drive side area of the straightener. In the occasions where the roll changer is required to have a long stroke, especially when the roll changer workshop is required to cross the span, it is obviously impossible to use the guide rod to guide and push the roll changer.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a cantilever type parallel roll leveler roll changing device, which can accurately and simultaneously center multiple pairs of roll sleeves and straightening rolls on the bracket, and the roll changing method is simple and fast , It is also suitable for long-distance cross-travel driving of the roller changing car to change the roller.

The present invention adopts following technical scheme:

The roll changing device of the cantilever type parallel roll straightener includes a track frame, a transmission mechanism and a roll changing vehicle. The roller changing vehicle is provided with a bracket lifting mechanism. Move on track rack.

Further, the bracket lifting mechanism includes an upper bracket and a lower bracket, both of which are fixed as a whole by bolts, and the bracket lifting mechanism also includes a hydraulic cylinder fixed on the roll changing car, a guide vertical shaft and processed on the The sleeve on the lower bracket, the movable end of the hydraulic cylinder supports the bottom of the lower bracket, the upper bracket and the lower bracket are provided with the same number of roller sleeve assembly pairs, and the position of the curved surface is the same as When the straightening machine is in the roll changing position, the upper and lower straightening rollers are installed in corresponding positions.

Further, a track is installed on the track frame, and a wheel shaft is installed in the roll changing car, wheels are arranged at both ends of the wheel shaft, and the wheels are attached to the track.

Further, the transmission mechanism includes a deceleration motor, a driving gear installed on the output shaft of the deceleration motor, and a transmission shaft installed on the roll changing vehicle. A driven gear is installed in the middle of the transmission shaft, and the two transmission shafts A synchronous gear is fixed at the end, a chain is sleeved on the driving gear and the driven gear, and a rack is installed on the track frame, and the synchronous gear meshes with the rack.

Further, the transmission mechanism also includes a cable reel for receiving and unwinding cables.

Further, the device also includes a guide mechanism, the guide mechanism includes an eccentric shaft installed at the bottom of the roll changing vehicle, guide wheels are installed on the eccentric shaft, side guide rails are also provided inside the rail frame, and the guide The wheels fit snugly with the side rails.

Further, the two ends of the rail frame are also provided with connecting mechanisms for cascading of the rail frames.

The beneficial effects of the present invention are: the present invention adopts the bracket corresponding to the position of the straightening roller of the straightening machine to pull out and pull in the roller sleeve assembly pair; and the oil cylinder is symmetrically arranged at the bottom of the lower bracket, and the guide of the vertical shaft is used to prevent the bracket from Twist to realize synchronous lifting of the bracket; at the same time, the roller changing car is driven by a rack and pinion, and slides on the track through the car, and the guiding mechanism can also be used to guide the roller changing car, avoiding the roller changing car in all directions when driving. The deflection realizes the accurate centering of each roller cover on the bracket and the straightening roller of the straightening machine; when the position of the roller changing car deviates, its position can be easily adjusted. In addition, when the roller changing car needs a long stroke to cross the span, it only needs to increase the track frame. The invention is simple in structure, easy to manufacture and install, easy to operate, convenient to change rolls, can significantly reduce roll change time, realize fast roll change, and can be widely used in roll change of cantilever type parallel roll levelers.

Description of drawings

Fig. 1 is the front view of the roll changing device of the cantilever type parallel roll leveler provided by the embodiment of the present invention;

Fig. 2 is a right view of the roll changing device of the cantilever type parallel roll leveler provided by the embodiment of the present invention;

Fig. 3 is a schematic structural view of a bracket lifting mechanism provided by an embodiment of the present invention;

Fig. 4 is an enlarged view of part A in Fig. 1;

Fig. 5 is a cross-sectional view along B-B in Fig. 2 .

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

Figure 1 and Figure 2 respectively show the front view structure and the right view structure of the roll changing device of the cantilever type parallel roll leveler provided by the embodiment of the present invention, and only show the parts related to the embodiment of the present invention for convenience of description.

Referring to Fig. 1 and Fig. 2, the roll changing device of the cantilever type parallel roll straightening machine provided in this embodiment includes a track frame 1, a transmission mechanism 2 and a roll changing car 3, and the roller changing car 3 is provided with a bracket lifting mechanism 4 , the roll changing vehicle 3 moves on the track frame 1 through the transmission mechanism 2 .

During specific implementation, the bracket elevating mechanism 4 includes an upper bracket 41 and a lower bracket 42 , both of which are fixed as a whole by a latch 43 . With reference to the structural diagram of the bracket lifting mechanism shown in Figure 3, the bracket lifting mechanism also includes a hydraulic cylinder 44 fixed on the roll changing car, a guide vertical shaft 45 and a sleeve 46 processed on the lower bracket, The movable end of the hydraulic cylinder 44 supports the bottom of the lower bracket 42, and the upper bracket and the lower bracket are provided with the same number of curved surfaces as the number of roller sets, and the position of the curved surface is the same as that of the straightener when the roller is changed. When the upper and lower straightening rollers are installed in the corresponding position of the assembly pair.

In this structure, the upper bracket is used to support the upper roll sleeve of the straightening machine, the lower bracket is used to support the lower roll sleeve of the straightening machine, the upper and lower brackets are connected by bolts, and the upper and lower brackets support the curved surface of the roll sleeve. And the position strictly corresponds to the position of the roller sleeve assembly pair installed by the upper straightening roller and the lower straightening roller when the straightening machine is in the roll changing position. In the figure, there are 5 curved surfaces on the upper and lower brackets, which can complete 10 pairs of roller sleeves and change rollers. The crane in the operation preparation area outside the rolling line can lift the upper and lower brackets and the roller sleeve assembly pair on the bracket out of the operation area to the preparation area, and hoist them on the roll changing vehicle to realize quick roll change and save roll change time. In order to avoid inclination in the direction of the rolling line and the vertical direction of the rolling line after the bracket supports the roller set, in this embodiment, the hydraulic cylinders are symmetrically arranged under the lower bracket, and the hydraulic cylinders are synchronously lifted and moved between the guide vertical shaft and the sleeve. Cooperating with the guidance of the cylinder, the bracket can be lifted and lowered smoothly as a whole to prevent the bracket from tipping over.

As a preferred structure, as shown in the enlarged view of part A in Fig. 1 as shown in Fig. 4, a rail 11 is installed on the rail frame 1, and a wheel shaft 31 is installed in the roller changing car 3, and the two ends of the wheel shaft are provided with The wheels 32 are free to rotate and attached to the track 11 . Driven by the transmission mechanism, the roll changing vehicle 3 runs smoothly on the track 11 . Here, the wheels are arranged according to the position of the center of gravity after the roller changer is installed on the roller cover and the assembly pair, so as to prevent the roll changer from tipping when it pulls out the roller cover, and ensure the stability of the roll changer when it is fully loaded.

In this embodiment, preferably, the transmission mechanism adopts a chain transmission and cooperates with a rack and pinion. Specifically, the transmission mechanism 2 includes a reduction motor 21, a drive gear 22 installed on the output shaft of the reduction motor 21, and a drive gear 22 installed on the output shaft of the reduction motor 21. The drive shaft 23 on the roll changing car, a driven gear (not shown) is installed in the middle of the drive shaft, and a synchronous gear 24 is fixed at both ends of the drive shaft 23, and the drive gear and the driven gear A chain 25 is sleeved, and a rack 26 is installed on the track frame, and the synchronous gear meshes with the rack. Here, the driven gear and the synchronizing gear are mechanically synchronized through the transmission shaft. When working, the output shaft of the reduction motor rotates, and the transmission shaft is driven by the chain to rotate, and then driven by the rack and pinion. move. In addition, preferably, the transmission mechanism 2 further includes a cable reel 27 for receiving and unwinding cables. The cable reel 27 retracts the power cord and the signal wire when the roller changing vehicle is running.

Further as a preferred embodiment, the device also includes a guide mechanism 5, as shown in Figure 5, the guide mechanism 5 includes an eccentric shaft 51 installed at the bottom of the roller changing car, and a guide wheel 52 is installed on the eccentric shaft 51 , the inner side of the track frame is also provided with side guide rails 53, and the guide wheels 52 are in close contact with the side guide rails 53. Adjusting the eccentricity of the eccentric shaft can fine-tune the position of the roller changing car to prevent the car body from deflecting in the horizontal plane and further ensure the accurate alignment of the roller sleeve assembly pair. Therefore, when the roll changing car deviates in the rolling line direction, it can be adjusted by adjusting the eccentricity of the eccentric shaft. Under the action of the guide mechanism of the roll changing car and the synchronous gear and rack, it can effectively avoid the deviation and twisting of the roller changing car during driving, so as to ensure the correct position of the roller changing car when changing rolls, and realize the assembly and straightening of each roller set Accurate alignment of rollers. In this embodiment, the guide mechanism is arranged in four places, and two side guide rails on one side, front and back respectively are close to the side guide rails to realize the guidance.

In this embodiment, the track frame is installed on both sides of the roller changing car, and rails, racks and side guide rails are installed on the track frame, which are used for driving the roller changing car, dragging in or pushing out each roller sleeve assembly pair. In some occasions, the distance between the roll changing operation area and the operation preparation area of the straightener is relatively far, and the roll changing vehicle needs a long stroke, especially when the roll changing vehicle needs to cross the span. In order to apply this situation, preferably, the two ends of the rail frame There is also a connecting mechanism for cascading rail racks. The stroke of the roller changing vehicle depends on the length of the track frame. When the design requires a long stroke of the roller changing vehicle, such as over-span, it can be realized by adding a track frame behind the track frame.

Further, in order to realize rapid roll change, it is necessary to prepare a spare bracket, which also includes an upper bracket, a latch and a lower bracket. When preparing to change rolls, a new roller cover is assembled and hoisted on the spare bracket. When changing rolls, first pull out the old roll set and then push in the new roll set. First of all, the new roller sleeve is assembled and hoisted on the spare bracket during the roll change preparation stage. During specific work, the hydraulic cylinder in the work preparation area is retracted to the lower limit position, and the bracket is also at the lower limit position at this time; the gear motor is driven through the rack and pinion and combined with the rack and pinion drive, and the roller changing vehicle drives in with the bracket. to the roll changing position; the hydraulic cylinder is raised to the upper limit position, the bracket supports all the roll sleeves and then the deceleration motor is started, and the roll changing vehicle pulls out each pair of old roll sets from the straightening roller; the roll changing vehicle drives out of the operation area, the hydraulic cylinder is lowered to the lower limit position; the roll changer drives to the operation preparation area, the crane lifts out the bracket and the old roller sleeve assembly together, and then hoistes the new roller sleeve assembly and bracket; the hydraulic cylinder is raised to the upper limit position , the roll changing car drives to the roll changing position and pushes each roll set assembly onto the straightening roller; the hydraulic cylinder drops to the lower limit position, the brackets drop together, and the roll changing car drives out, so far the old roll set assembly is dragged out and the new roll The set push job is done.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (2)

1. a cantilevered parallel rollers roller replacing device for straightening machine, it is characterised in that described device includes that track frame, drive mechanism and roll changing carriage, described roll changing carriage are provided with bracket elevating mechanism, described roll changing carriage is moved on described track frame by described drive mechanism；Described bracket elevating mechanism includes bracket and bottom bracket, both are fixed as one by latch, described bracket elevating mechanism also includes the hydraulic cylinder being fixed on roll changing carriage and guides vertical shaft and processing sleeve on described bottom bracket, described hydraulic cylinder movable end is held bottom described bottom bracket, the synchronization that described hydraulic cylinder realizes bracket by hydraulic synchronization rises, described bracket is equipped with the curved surface that quantity secondary with roller shell assembling is identical with bottom bracket, and the secondary position of set assembling that when described surface location is in roll change position with straightener, upper and lower smoothing roll is installed is corresponding；Described bracket and bottom bracket, with the roller shell assembling pair being mounted above, overall can hang out through guiding vertical shaft or hang in from roll changing carriage；Being provided with track on described track frame, be provided with wheel shaft in described roll changing carriage, described wheel shaft two ends are provided with wheel, and described wheel is fitted on the track；The power transmission shaft driving gear, being arranged on described roll changing carriage that described drive mechanism includes reducing motor, is arranged on described reducing motor output shaft, in the middle of described power transmission shaft, driven gear is installed, power transmission shaft two ends are fixed with synchromesh gear, it is socketed with chain on described driving gear and described driven gear, being also equipped with tooth bar on described track frame, described synchromesh gear engages with described tooth bar；Described device also includes that guiding mechanism, described guiding mechanism include the eccentric shaft being arranged on bottom roll changing carriage, described eccentric shaft is provided with directive wheel, is additionally provided with side rails inside described track frame, and described directive wheel is close to described side rails；Described track frame two ends are additionally provided with bindiny mechanism, cascade for track frame.

2. device as claimed in claim 1, it is characterised in that described drive mechanism also includes the cable drum for folding and unfolding cable.