CN204381060U - A kind of high speed special steel mm finishing mill unit - Google Patents

Abstract

A high-speed special steel finishing mill, including a base and a number of finish rolling mills installed on the base to form 45° top crossing and staggered finishing mills, and a speed-increasing gearbox connected to the motor is arranged on one side of the base , the speed-increasing gearbox is connected to the finishing mills arranged in a 45° top intersection and staggered arrangement through the output shafts on both sides and the inter-mill couplings, and the single finishing mills on each side are connected in series through the inter-mill couplings. The high-speed special steel wire rod finishing mill of the utility model adopts 8 finishing mills arranged staggeredly at 45°, centralized transmission, and adopts a design speed of 90M/s. It is better than the currently backward side crossing special steel wire rod finishing mill model in China, with 45° top crossing staggered arrangement, which avoids the suspension structure of the rolling mill, reduces the height of the rolling center, and can improve the rigidity of the finishing mill. It avoids large vibration during rolling, and provides a guarantee for improving the speed and dimensional accuracy of the rolled piece.

Description

A high-speed special steel finishing mill

technical field

The utility model belongs to the technical field of steel rolling equipment in the metallurgical industry, in particular to a high-speed special steel finish rolling unit.

Background technique

The domestic market demand for special steel wire rods is very large, but the rolling process and equipment of special steel wire rods in my country are backward, which is far from meeting the needs of the market in terms of variety, quality accuracy and other aspects. The reason mainly lies in that the existing special steel wire rod rolling equipment is outdated, the rolling speed is low, the product rolling accuracy is poor, and the rolling process is backward and the efficiency is low. As a result, my country still relies on imports for most steel products in the production of special steel wire rods. Due to the large and complicated equipment layout space of the existing side delivery type, the rolling mill adopts a suspended structure, which makes the rolling center relatively high, resulting in poor rigidity and large vibration of the equipment, so the dimensional accuracy and The speed cannot be increased. Learn from the characteristics of the existing high-speed 45° top-crossing finish rolling mill. However, since the transmission ratio of this type of finishing mill is designed according to the material rolling characteristics of ordinary carbon steel, and because the rolling characteristics and processes of special steel (stainless steel, tool steel, valve steel, etc.) are completely different from ordinary steel, the current Some finishing rolling mills cannot meet the rolling requirements of special steel wire rods.

Contents of the invention

The purpose of the utility model is to provide a high-speed special steel finishing rolling unit that can meet the high-speed and high-dimensional precision rolling requirements of special steel wire rods.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a finishing mill consisting of a base and a number of finishing mills installed on the base with 45° top crossing and staggered arrangement. The speed-increasing gearbox is connected to the finish rolling units arranged in a 45° top intersection and staggered arrangement through the output shafts on both sides and the coupling between rolling mills, and the single finishing rolling mill on each side passes through the coupling between rolling mills sequentially connected in series.

One side of the finishing rolling unit is No. 1, 3, 5, and 7 finishing mills, and the other side is No. 2, 4, 6, and 8 finishing mills. Each finishing mill is composed of a roll shaft gearbox and a bevel gear transmission box. .

The bevel gear transmission box includes an input bevel gear shaft and an output bevel gear shaft arranged perpendicular to each other, the input bevel gear shaft is connected with the coupling between rolling mills, the input bevel gear shaft is equipped with an input bevel gear, and the output bevel gear shaft is An output bevel gear engaged with the input bevel gear is installed, and a first helical gear is also installed on the output bevel gear shaft, and the first helical gear is in engagement with the second helical gear on the auxiliary shaft.

The roll shaft gearbox includes an upper roll gear shaft and a lower roll gear shaft, the upper roll gear shaft and the lower roll gear shaft are equipped with gears meshed with the first helical gear and the second helical gear, the upper roll gear shaft and the lower roll gear shaft The lower roll gear shaft, the upper roll shaft ring, and the lower roll shaft roll ring are interference-fitted to realize the relative rotation of the roll ring.

The upper roll gear shaft and the lower roll gear shaft are installed in the roll gear box through the oil film bearing assembly.

The motor is connected to the speed-up gearbox through a motor coupling of the speed-up gearbox.

The high-speed special steel wire rod finishing mill of the utility model adopts 8 finishing mills staggered at 45°, centralized transmission, and a design speed of 90M/s. It is superior to the currently backward side-pass special steel wire rod finishing mill model in China. The 45° top-crossing staggered arrangement avoids the suspension structure of the rolling mill, reduces the height of the rolling center, and can improve the rigidity of the finishing mill. It avoids large vibration during rolling, and provides a guarantee for improving the speed and dimensional accuracy of the rolled piece.

At the same time, redesign the rolling pass and the matching gear transmission to realize the optimization of the special steel rolling process. On the premise of greatly improving the rolling efficiency of special steel wire rods, it provides equipment support for the multi-variety rolling of special steel wire rods. By redesigning the transmission ratio and the pass shape, the dimensional accuracy and quality of the rolled piece are effectively improved. It saves cost for subsequent finishing. Meet the needs of the market.

Description of drawings

Fig. 1 is the structural representation of the finishing mill of the present utility model;

Figure 2 is a schematic diagram of the assembly structure of a single finishing mill;

Fig. 3a is a schematic diagram of the assembly structure of a bevel gearbox, and Fig. 3b is a B-B sectional view of Fig. 3a;

Fig. 4 is the assembly schematic diagram of roll shaft gearbox;

Detailed ways

The structural principle and working principle of the present utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1, 2, the utility model comprises a base 13 and a finishing mill group composed of eight finish rolling mills mounted on the base 13 at 45° top crossing and staggered arrangement, one side of the finishing mill group is 1, 3, 5, No. 7 finishing mill, and No. 2, 4, 6, and 8 finishing mills on the other side. Each finishing mill is assembled by a roll shaft gearbox and a bevel gear transmission box through bolted connections, and is installed on one side of the base 13. There is a motor 12, and the motor 12 is connected with the speed-increasing gearbox 10 through the motor coupling 11 of the speed-increasing box. The arranged finishing rolling mills are connected together, and the single finishing rolling mills on each side are sequentially connected in series through the coupling 9 between the rolling mills.

Referring to Figures 3a-3b, the bevel gear transmission box of the present invention includes an input bevel gear shaft 16 and an output bevel gear shaft 19 arranged perpendicular to each other, the input bevel gear shaft 16 is connected with the coupling 9 between rolling mills, and the input bevel gear shaft 16 The input bevel gear 17 is installed on the top, and the output bevel gear 18 meshing with the input bevel gear 17 is installed on the output bevel gear shaft 19, and the first helical gear 20 is also installed on the output bevel gear shaft 19, the first helical gear 20 and the auxiliary The second helical gear 21 on the shaft 22 meshes.

Referring to Fig. 4, the roll shaft gearbox of the present invention includes an upper roll gear shaft 23 and a lower roll gear shaft 24, and the upper roll gear shaft 23 and the lower roll gear shaft 24 are installed in the roll shaft gearbox through an oil film bearing assembly 25, and the upper The gear that meshes with the first helical gear 20 and the second helical gear 21 is installed on the roll gear shaft 23 and the lower roll gear shaft 24, the upper roll gear shaft 23 and the lower roll gear shaft 24 are connected with the upper roll shaft roll ring 15, the lower The relative rotation of the roll ring 14 is realized by the interference fit of the roll shaft roll ring 14 .

The utility model is a medium-high speed 90m/s 45° top crossing, 8 sorties Special steel wire rod finishing mill. Using centralized transmission mode,

No. 1-No. 8 finishing mills of the utility model finish rolling mills are arranged in a 45° staggered order, and the finishing mills on each side are connected in series through the inter-rolling mill coupling 9, and the two output shafts of the two sides of the finishing mill are respectively passed through the speed-increasing gearbox 10 to centrally drive the finishing mills. . The speed-up gear box 10 is driven by the motor 12 through the speed-up box motor coupling 11, and it divides the power into two output shafts to output the power while speeding up through the transmission ratio, respectively with the finishing mills on both sides, one side is 1, No. 3, No. 5 and No. 7 finishing mills, and the other side is connected to No. 16 input bevel gear shafts of No. 2, 4, 6 and 8 finishing mills, as shown in Figure 3. The input bevel gear 17 is meshed with the output bevel gear 18 to achieve 90 ° staggered transmission, and drive the output bevel gear shaft 19 and the first helical gear 20 installed thereon. The first helical gear 20 meshes with the second helical gear 21 on the countershaft 22 to realize power output. After the bevel gear transmission box and the roll shaft gearbox are assembled, the first helical gear 20 and the second helical gear 21 are engaged with the gears on the upper roll gear shaft 23 and the lower roll gear shaft 24 of the roll shaft gearbox respectively. . To achieve rolling power output. The upper and lower roll shafts drive the upper roll shaft roll ring 15 and the lower roll shaft roll ring 14 to realize relative rotation of the roll rings through interference fit. It realizes the rolling and pinching of the wire rod through extrusion deformation and friction of the rolled piece. During the rolling process, according to the rolling process, the rotation speed of the rolls increases sequentially from No. 1 to No. 8, and the roll gaps of the upper and lower roll rings 15 and 14 decrease sequentially. The design realizes micro-tension and twist-free rolling.

Claims (6)

1. a high speed special steel mm finishing mill unit, it is characterized in that: comprise base (13) and be arranged on the mm finishing mill unit of finishing mill composition of some groups of topcross at 45 ° on base (13), interlaced arrangement, the step-up gear (10) be connected with motor (12) is provided with in the side of base (13), this step-up gear (10) is connected with the mm finishing mill unit of topcross at 45 °, interlaced arrangement respectively by shaft coupling (9) between both sides output shaft and milling train, and every side separate unit finishing mill to be contacted connection successively by shaft coupling (9) between milling train.

2. high speed special steel mm finishing mill unit according to claim 1, it is characterized in that: described mm finishing mill unit side is (1,3,5,7) number finishing mill, opposite side is (2,4,6,8) number finishing mill, and every platform finishing mill is made up of roll mandrel gear-box and bevel gear housing.

3. high speed special steel mm finishing mill unit according to claim 2, it is characterized in that: described bevel gear housing comprises mutual vertically disposed input bevel gear shaft (16) and output bevel gear wheel shaft (19), input bevel gear shaft (16) is connected with shaft coupling between milling train (9), input bevel gear shaft (16) is provided with input bevel gear (17), output bevel gear wheel shaft (19) is provided with and inputs bevel gear (17) and engage output bevel gear and take turns (18), output bevel gear wheel shaft (19) is also provided with the first helical gear (20), first helical gear (20) is meshed with the second helical gear (21) on countershaft (22).

4. high speed special steel mm finishing mill unit according to claim 3, it is characterized in that: described roll mandrel gear-box comprises topping roll gear shaft (23) and bottom roll gear shaft (24), topping roll gear shaft (23) and bottom roll gear shaft (24) are provided with the gear be meshed with the first helical gear (20), the second helical gear (21), and topping roll gear shaft (23) realizes the relative rotation of collars with bottom roll gear shaft (24) and topping roll beaming roller ring (15), bottom roll beaming roller ring (14) elastic conjunction.

5. high speed special steel mm finishing mill unit according to claim 4, is characterized in that: described topping roll gear shaft (23) and bottom roll gear shaft (24) are arranged on by oil film bearing assembly (25) and roll in shaft gear case.

6. high speed special steel mm finishing mill unit according to claim 1, is characterized in that: described motor (12) is connected by gearbox motor coupler (11) with step-up gear (10).