CN204672693U - A kind of wire and bar mill - Google Patents

Abstract

The utility model discloses a wire and bar rolling mill, comprising: a first transmission device, at least two pairs of first gear pairs with different transmission ratios are arranged on the first driving shaft and the first driven shaft, and the first transmission device also has Switch different first gear pairs fixedly connected with the first driving shaft or the first driven shaft; the second transmission device, the second driving shaft and the second driven shaft are provided with at least two pairs of different transmission ratios The second gear pair, the second transmission device also has a second shifting device that switches different second gear pairs and is fixedly connected with the second driving shaft or the second driven shaft; the first power device, the first power device passes through the first The transmission device is connected with the first roller case; the second power device is connected with the second roller case through the second transmission device. In the utility model, each roller box is independently driven by a low-power power device, and the power transmission is carried out by a shifting transmission device, so that the cost is greatly reduced, and the investment and use and maintenance costs are reduced.

Description

A wire rod rolling mill

technical field

The utility model relates to the technical field of steel rolling equipment, in particular to a wire and bar rolling mill.

Background technique

As the main equipment in the steel hot rolling production line, the rolling mill is used to roll the blank into shape, such as for the rolling of threaded steel bars, round steel, etc., and usually passes through rough rolling, intermediate rolling, pre-finishing rolling, finishing rolling, etc. Passes are rolled to produce finished products.

At present, due to the high rolling speed of the finishing mill used for wire rod rolling, the rolling mill usually adopts the racks arranged alternately with the top of the roll to realize the non-twist rolling of the rolled piece, reduce the vibration and facilitate the replacement of the roll, and due to the requirement of the machine The distance between the racks is small and the flow rate of each rack is required to be equal during rolling to avoid piles of steel. Usually, a centralized transmission is used to drive the rolls on all racks, and a large main motor distributes power to each rack through a long shaft. There are three racks, and the gears in each rack are assigned a different but fixed speed ratio.

This method well ensures that the second flow rate between the racks is equal, but the continuous multiple racks are driven by a main motor, resulting in a huge power of the main motor, and the need to use a high-voltage motor, which greatly increases the cost, and this kind of High-voltage large motors and their electrical control device technologies are mostly monopolized in the market, with high costs and difficult maintenance, making it difficult to be popularized and used.

In addition, this multi-rack centralized transmission method, because its transmission chain is too long, its no-load power even reaches about thousands of kilowatts, resulting in a huge loss of energy consumption, especially now that steel production enterprises are increasingly competitive and difficult to survive In some cases, this kind of transmission mode and rolling mill with high investment cost and large energy loss cannot meet the needs of cost reduction, energy saving and emission reduction.

In this kind of centralized transmission, the gear speed ratio of each rolling mill is fixed, and the gear cannot be changed. Only the frequency conversion of the motor can be used to meet the wide range of rolling speed requirements from about 20m/s to 110m/s, and it is difficult to give full play to the performance of the motor. Efficacy, that is, it is difficult to achieve an effective matching output of torque and speed by shifting gears during rolling, and it is necessary to amplify the power of the motor to meet the rolling demand, resulting in loss. At the same time, since the speed ratio between the racks is fixed and driven by one motor, when the wear amount of the roll ring of one of the racks is more, that is, the diameter of the roll ring becomes smaller, and the linear speed of the roll ring becomes smaller, resulting in a second flow rate. The second flow rate of the adjacent rolling mill is less than that of the adjacent rolling mill, and piles of steel are generated. At this time, because the speed ratio of the rolling mill is fixed, and it is driven by a motor, the roll ring must be replaced, or even the roll ring of multiple stands can be re-established. The relationship between the flow rate per second is equal, and the normal steel rolling will cause a large loss of the roll ring, a large number of spare parts, difficult maintenance, and a corresponding increase in rolling costs.

Therefore, how to reduce the consumption cost of the rolling mill is a technical problem that those skilled in the art need to solve at present.

Utility model content

In view of this, the purpose of this utility model is to provide a wire and bar rolling mill, which has low investment, maintenance and use costs.

In order to achieve the above object, the utility model provides the following technical solutions:

A wire and bar rolling mill, comprising a first roll box and a second roll box, the first roll box and the second roll box are installed on the cone box in a top-over state, and also include:

The first transmission device, the first transmission device includes a first driving shaft, a first driven shaft and a first output shaft connected with the first driven shaft, the first output shaft is connected to the first roller The first driving shaft and the first driven shaft are provided with at least two pairs of first gear pairs with different transmission ratios, and the first transmission device also has the function of switching between the first gear pair and the first driven shaft. A first shifting device fixedly connected to the first driving shaft or the first driven shaft;

The second transmission device, the second transmission device includes a second driving shaft, a second driven shaft and a second output shaft connected with the second driven shaft, the first output shaft is connected to the first roller box connection, the second drive shaft and the second driven shaft are provided with at least two pairs of second gear pairs with different transmission ratios, and the second transmission device also has the function of switching between the second gear pairs and the second gear pairs. A second shifting device fixedly connected to the second driving shaft or the second driven shaft;

a first power device, the first power device is connected to the first roller box through the first transmission device;

A second power device, the second power device is connected to the second roller box through the second transmission device.

Preferably, the first shifting device includes a first shift fork and a first gear sleeve fixedly connected with the first driven shaft, and the first gear sleeve is arranged on two ends of the first driven shaft. Between the two first gears, the two ends of the gears are provided with joints for connecting with the first gear, and the outer peripheral part of the first gear sleeve is snap-connected with the first shift fork;

The second shifting device includes a second shift fork and a second gear sleeve fixedly connected with the second driven shaft, and the second gear sleeve is arranged on two second gears on the first driven shaft In between, the two end surfaces thereof are provided with coupling parts for connecting with the second gear, and the outer peripheral part of the second gear sleeve is snap-connected with the second shift fork.

Preferably, the first roller box is connected to the first output shaft through a bevel gear transmission in the cone box; the second roller box is connected to the second output shaft through another bevel gear transmission. shaft connection;

The bevel gear transmission includes a bevel gear, a bevel gear shaft and a roll drive shaft, the bevel gear shaft is connected to the first output shaft or the second output shaft, and the bevel gear is sleeved on the bevel gear On the shaft, the roll transmission shaft is meshed with the bevel gear and the roll shaft respectively.

Preferably, it also includes a first transmission shaft and/or a second transmission shaft, the first transmission shaft is arranged between the first input shaft of the first transmission device and the first drive shaft, the second The transmission shaft is arranged between the second input shaft of the second transmission device and the second drive shaft.

Preferably, the roll shaft meshes with the drive shaft gear on the roll drive shaft through a roll gear.

Preferably, the first transmission device and the second transmission device are arranged in a gearbox.

In the wire and bar rolling mill provided by the utility model, the rolls of the first roll box and the second roll box are arranged on top of each other, and are separately driven and controlled by the first power device and the second power device. The two roll boxes and the corresponding transmission device and power device form the smallest twist-free rolling unit. On the one hand, it ensures the rolling process requirements of the small distance between the upper roll boxes of the rolling mill. On the other hand, the multi-stand centralized transmission rolling mill is transformed into a rolling unit equipped with two roll boxes. It can be driven by a low-power power unit alone, the power unit can be a motor, the gear transmission pairs of the first transmission device and the second transmission device are reduced, the transmission chain path is shortened, the transmission efficiency is improved, and the no-load power is small. When in use, a low-voltage and low-power motor can be used as a power device for transmission. The supply range is wide, the cost is greatly reduced, and the investment and use and maintenance costs are reduced.

In addition, with the independent transmission method, the two motors can also be controlled by speed regulation, so that the output speeds of the two motors form a flexible speed ratio relationship, instead of the fixed speed ratio between the rolling mill stands of the centralized transmission method, then, when When the wear of the rolls of one roll box increases, the corresponding power device is used to adjust the speed, so that the two roll boxes can easily ensure the same rolling second flow rate, the pass configuration is more flexible than the centralized transmission, and the roll spare parts are less , low maintenance costs.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the structural representation of the specific embodiment of the wire bar mill provided by the utility model;

Fig. 2 is the internal structure diagram of the specific embodiment of the wire and bar rolling mill provided by the utility model;

Fig. 3 is the three-dimensional structure diagram of the roll box in the specific embodiment of the wire and bar rolling mill provided by the utility model;

Fig. 4 is a structural diagram of the first shifting device in a specific embodiment of the wire and bar rolling mill provided by the present invention.

Among them, 1 is the cone box, 3 is the gearbox, 21 is the first roller box, 22 is the second roller box, 41 is the first power device, 42 is the second power device, 101 is the bevel gear transmission device, 102 is the transmission Shaft gear, 201 is the roll shaft, 202 is the roll gear, 301 is the first transmission device, 302 is the second transmission device, 313 is the first gear sleeve, 314 is the first output shaft, 324 is the second output shaft, 315 is The first input shaft, 325 is the second input shaft, and 316 is the first shift fork.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The core of the utility model is to provide a wire and bar rolling mill, which is low in cost.

Please refer to Fig. 1 to Fig. 3, Fig. 1 to Fig. 3 are the structural schematic diagram, the internal structural diagram and the three-dimensional structural diagram of the roll box of the specific embodiment of the wire and bar rolling mill provided by the present invention.

The wire and bar rolling mill provided in this embodiment mainly includes a first power unit 41 , a second power unit 42 , a first roll box 21 and a second roll box 22 . The first roll box 21 and the second roll box 22 are boxes respectively provided with a roll shaft 201 and rolls, and the gear on the roll shaft 201 is engaged with an external power device for transmission.

Both the first roll box 21 and the second roll box 22 are equipped with two roll shafts 201, and the first roll box 21 and the second roll box 22 are set in the top-to-side state, installed on the cone box 1, the first roll box The roll shaft 201 on the 21 and the roll shaft 201 on the second roll box 22 are perpendicular to each other and are in a top crossing state, so that the rolled piece can be rolled in two orthogonal directions of the plane, which can make the rolled piece conform to the rolling state to the greatest extent. system requirements.

Both the first transmission device 301 and the second transmission device 302 in this embodiment are shaft transmission devices.

The first transmission device 301 includes a first input shaft 315, a first driving shaft, a first driven shaft and a first output shaft 314 connected to the first driven shaft, and the first output shaft 314 is also connected to the first roller box 21 . Both the first driving shaft and the first driven shaft are provided with two first gears with different numbers of teeth, and the first gear of the first driving shaft meshes with the first gear on the first driven shaft to form two sets of transmission ratios For different first gear pairs, the first driven shaft is provided with a first shifting device, and the first shifting device is used to switch between different first gear pairs and fixed connection with the first driving shaft or with the first driven shaft. The shifting device can be arranged on the first driving shaft, on the first driven shaft, or other positions.

The structure of the second transmission device 302 is basically the same as that of the first transmission device 301 . The second transmission device 302 includes a second input shaft 325, a second driving shaft, a second driven shaft and a second output shaft 324 connected with the second driven shaft, and the second output shaft 324 is also connected with the second roller box 22 . Both the second driving shaft and the second driven shaft are provided with at least two second gears with different numbers of teeth, and the second gears of the second driving shaft are correspondingly meshed with the second gears on the second driven shaft to form two sets of transmission The second gear set with different ratios, the second driven shaft is provided with a second shifting device, and the second shifting device is used to switch between different second gear pairs and fixedly connect with the second driving shaft or with the second driven shaft . The shifting device can be arranged on the second driving shaft, on the second driven shaft, or other positions.

Optionally, the number of the first gears on the first driving shaft and the first driven shaft is not limited to the above two, but may be three or more, and the first gears on the two shafts are respectively meshed , forming multiple pairs of first gear sets with different transmission ratios, which can increase the selection of speed ratios of the transmission device. The settings on the second driving shaft and the second driven shaft are the same as those described above, and will not be repeated here.

The first roller box 21 is connected to the first power unit 41 through the first transmission device 301, the second roller box 22 is connected to the second power unit 42 through the second transmission device 302, and the first power unit 41 and the second power unit 42 are separately driven. Two roll cases. Two roll boxes, two transmissions and two power units form the smallest twist-free rolling unit. Wherein, both the first power device 41 and the second power device 42 may be motors. On the one hand, it ensures the rolling process requirements of the small distance between the upper roll boxes of the rolling mill; The box is driven by a low-power power unit alone, the number of gear transmission pairs is reduced, the path of the transmission chain is shortened, the transmission efficiency is improved, the no-load power is small, and the required power is also significantly reduced. When in use, a low-voltage and low-power motor can be used as a power device for transmission. The supply range is wide, the cost is greatly reduced, and the investment and use and maintenance costs are reduced.

In addition, with the independent transmission method, the two motors can also be controlled by speed regulation, so that the output speeds of the two motors form a flexible speed ratio relationship, instead of the fixed speed ratio between the rolling mill stands of the centralized transmission method, then, when When the wear of the rolls of one stand is greater, the speed of the drive motor is adjusted so that the two roll boxes can easily ensure the same rolling second flow rate, the pass configuration is more flexible than the centralized drive, and the roll spare parts are less. Low maintenance.

Preferably, the above-mentioned first shifting device includes a first shift fork 316 and a first tooth sleeve 313, please refer to FIG. 4, which is the structure of the first shifting device in a specific embodiment of the wire and bar rolling mill provided by the present invention picture. The first tooth sleeve 313 is fixedly connected with the first driven shaft, and the first tooth sleeve 313 is arranged between the two first gears on the first driven shaft, and the two ends of the first tooth sleeve 313 are provided with A gear-connected ring gear, the outer peripheral portion of the first gear sleeve 313 is snap-connected with the first shift fork 316 . The inner ring gears on both ends of the first gear sleeve 313 can engage with the above-mentioned two first gears that are vacantly sleeved on the first driven shaft, so that the first driven shaft can selectively connect with the two first gears. One of them is snapped in and out, or both are in a detached state. One end of the first shift fork 316 is snap-connected with the outer periphery of the first gear sleeve 313, and the other end is connected with a manual lever or a hydraulic valve, and the first gear sleeve 313 can be moved by moving the manual lever or hydraulic valve. The internal teeth on the end face of the first gear sleeve 313 are combined or separated from the ring gears of the first gears on both sides, so as to realize the combination of the first driven shaft and one of the two first gears, and finally realize the shifting of gears. Please refer to the prior art for the rest of the structure and design of the above-mentioned first shifting device.

The second shifting device with the same structure as the first shifting device mainly includes a second shift fork and a second gear sleeve, the second gear sleeve is fixedly connected to the second driven shaft, and the second gear sleeve is arranged at the second Between the two second gears on a driven shaft, ring gears for connecting with the second gears are arranged on both end surfaces of the second tooth sleeve, and the outer peripheral part of the second gear sleeve is snap-connected with the second shift fork.

Optionally, the structures of the first shifting device and the second shifting device are not limited to the above-mentioned forms of gear sleeves and shift forks, and the shifting function of the driven shaft can also be realized by other clutch devices.

By setting shifting devices on the above-mentioned first transmission device 301 and second transmission device 302, and setting at least two speed ratios, the power of the motor can be effectively utilized. When the speed is low, use a large speed ratio gear to increase the output. Torque, when at high speed, use a low speed ratio speed-up gear to increase the output speed. In contrast, for the selection of the motor, a low-power motor can be configured to meet a wide range of rolling requirements, that is, the rolling speed range is 20m/s-110m/s, and such settings can effectively reduce energy consumption.

Preferably, since the first gears on the above-mentioned first driven shaft can be three or more, the number of the first shifting devices is not unique, and it is necessary to meet the requirements of two adjacent gears on the first driven shaft. A first shifting device is provided between the first gears, or the shifting of at least three first gears is realized through the only first shifting device. The setting of the second shifting device is the same as above, and will not be repeated.

On the basis of the above-mentioned embodiments, the connection transmission mode of the first output shaft 314, the second output circle 324 and the roll shaft 201 is further introduced. The design that the roll shafts 201 are perpendicular to each other requires a certain setting angle for the transmission device connecting the first output shaft 314 and the second output shaft 324 with the roll shaft 201 .

Preferably, the first roller box 21 is connected with the first output shaft 314 through the bevel gear transmission 101 in the bevel box 1; the second roll box 22 is connected with the second output shaft 324 through another bevel gear transmission 101; the bevel gear The transmission device 101 comprises a bevel gear, a bevel gear shaft and a roll transmission shaft, the bevel gear shaft is connected with the first output shaft 314 or the second output shaft 324, the bevel gear is sleeved on the bevel gear shaft, and the roll transmission shaft is respectively connected with the bevel gear, The roll shaft 201 meshes.

Wherein, the first output shaft 314 and the second output shaft 324 are respectively connected to a bevel gear shaft for synchronous rotation through a coupling, and the bevel gear is fixedly connected to the bevel gear shaft; The shaft gear 102, the bevel gear of the transmission shaft meshes with the bevel gear on the bevel gear shaft, and the rotational force of the bevel gear transmission 101 is provided to the roll transmission shaft, and the transmission shaft gear 102 passes the power of the roll transmission shaft through its contact with the roll gear 202 Mesh connection for transfer. The roll shaft 201 meshes with the drive shaft gear 102 on the roll drive shaft through the roll gear 202 .

In the above way, the roll box and the roll shaft 201 can be detachably installed on the frame 1, so that the first roll box 21 and the second roll box 22 can be separated from the bevel gear transmission 101, and can be removed from the frame 1. Separated, the repair and maintenance of the roll shaft 201 are more convenient.

Optionally, the above-mentioned first transmission device 301 may also include a first transmission shaft, and the second transmission device 302 may also include a second transmission shaft, and the first transmission shaft is arranged on the first input shaft 315 of the first transmission device 301 Between the first driving shaft, the second transmission shaft is arranged between the second input shaft 325 of the second transmission device 302 and the second driving shaft. The main purpose of setting the first transmission shaft or the second transmission shaft is to increase the center distance. Since the distance between the first roll box 21 and the second roll box 22 is set according to the process requirements, the dimensions of the first power unit 41 and the second power unit 42 which are connected to the two for transmission respectively are also Fixed, so the first transmission device 301 or the second transmission device 302 needs to increase the center distance of the transmission to adapt to the connection position between the power device and the roller box, so that the overall position of the device is more reasonable.

Optionally, the roll shaft 201 meshes with the drive shaft gear 102 on the roll drive shaft through the roll gear 202 .

Optionally, the first transmission device 301 and the second transmission device 302 are arranged in the gearbox 3 . It is helpful to reduce the volume of the device and effectively utilize the space reasonably.

Optionally, the above-mentioned first gear and second gear may be cylindrical spur gears or cylindrical helical gears. The first transmission device 301 and the second transmission device 302 can also choose other forms of engaging transmission parts according to different specific situations.

Optionally, the first roll box 21 and the second roll box 22 are located on one side of the gearbox 3, and the first power unit 41 and the second power unit 42 are located on the other side of the gearbox 3. This arrangement helps Shorten the drive train.

The wire and bar rolling mill provided by the utility model has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (6)

1. a wire and bar mill, comprise the first roller case (21) and the second roller case (22), described first roller case (21) and described second roller case (22) are installed in topcross state on cone case (1), it is characterized in that, also comprise:

First transmission device (301), the first output shaft (314) that described first transmission device (301) comprises the first driving shaft, the first driven shaft and is connected with described first driven shaft, described first output shaft (314) is connected with described first roller case (21), described first driving shaft from described first driven shaft is provided with the first different gear mesh of at least two pairs of gearratios, described first transmission device (301) also has the first gearshift switching different described first gear mesh and be fixedly connected with described first driving shaft or described first driven shaft;

Second transmission device (302), the second output shaft (324) that described second transmission device (302) comprises the second driving shaft, the second driven shaft and is connected with described second driven shaft, described second output shaft (324) is connected with described second roller case (22), described second driving shaft from described second driven shaft is provided with the second different gear mesh of at least two pairs of gearratios, described second transmission device (302) also has the second gearshift switching different described second gear mesh and be fixedly connected with described second driving shaft or described second driven shaft;

First power set (41), described first power set (41) are connected with described first roller case (21) by described first transmission device (301);

Second power set (42), described second power set (42) are connected with described second roller case (22) by described second transmission device (302).

2. wire and bar mill according to claim 1, it is characterized in that, the first tooth cover (313) that described first gearshift comprises the first shift fork (316) and is fixedly connected with described first driven shaft, described first tooth cover (313) is arranged between two the first gears on described first driven shaft, its both ends of the surface are provided with for the gear ring with described first gear face clamping, and the peripheral part of described first tooth cover (313) is connected with the clamping of described first shift fork (316);

The second tooth cover that described second gearshift comprises the second shift fork and is fixedly connected with described second driven shaft, described second tooth cover to be arranged on described first driven shaft between two the second gears, its both ends of the surface are provided with for the gear ring with described second gear face clamping, and the peripheral part of described second tooth cover is connected with described second shift fork clamping.

3. wire and bar mill according to claim 2, it is characterized in that, described first roller case (21) is connected with described first output shaft (314) by the bevel gearing (101) in described cone case (1); Described second roller case (22) is connected with described second output shaft (324) by bevel gearing described in another (101);

Described bevel gearing (101) comprises bevel gear, bevel gear shaft and roller transmission shaft, described bevel gear shaft is connected with described first output shaft (314) or described second output shaft (324), described bevel gear is set on described bevel gear shaft, and described roller transmission shaft engages with described bevel gear, roll mandrel (201) respectively.

4. wire and bar mill according to claim 3, it is characterized in that, also comprise the first power transmission shaft and/or second driving shaft, between the first power shaft (315) that described first power transmission shaft is arranged on described first transmission device (301) and described first driving shaft, between the second power shaft (325) that described second driving shaft is arranged on described second transmission device (302) and described second driving shaft.

5. wire and bar mill according to claim 4, is characterized in that, described roll mandrel (201) is engaged with the shaft gear (102) in described roller transmission shaft by roller gear (202).

6. wire and bar mill according to claim 5, is characterized in that, described first transmission device (301) and described second transmission device (302) are arranged in gearbox (3).