Three-roller working crate reducing mill
Usage: relates to the field of rolling mills and can be used in a pipe units for the reduction of the pipes. The inventive three-roller working crate reducing mill includes a housing made of two halves, connected by bolts located in the housing cylindrical shaft mounted drive rollers, conical gears and bearings and sealing elements. The sealing elements are installed from the side of the rolls, consist of separate units and are located in bores made on both halves of the body. Each cylindrical shaft is made with a hollow bore, coaxially to its axis, which is equipped with a thrust, tightening between the bearings, and tapered roller gear. The invention provides a reduction of time in changing times, increase maintainability and reduce the size of the cage along the axis of rolling, which improves the technological characteristics of the mill and reduce leaf waste. 2 Il. The invention relates to the field of rolling mills, and more specifically to a three-roll stand reduction mill, and can be used the patent Germany 3040639, CL 21 In 17/14, publ. 1982).Known crate includes a housing made of two halves, stepped shafts mounted in interference fit bearings, rollers and tapered charsetname and sealing elements located in the bores of bevel gears, rollers and housings. The bearings are located in the hubs of the gears.The disadvantage of this design stand is the complexity and duration of the replacement roll. To change the rolls, you must first disconnect the two halves of the housing, to retrieve all nodes rolls together with gears and bearings, then remove the gears and bearings and then remove the rollers and in reverse order to install the new roll.Another disadvantage of this design stands is that replacement of sealing elements also requires complete disassembly of the cage and dismantling of the rolls.Shortcoming stands is the presence of the stepped shaft, on which is located the roller and which cannot be removed from the cage without complete disassembly.In addition, in the known cage rollers attached by interference fit on the hub of bevel gears, which complicates and increases the cost and lengthens the process of replacement is essentially a crate, described in the book VP of Onisiforou and other Reducing mills. Moscow, 1971, p. 167, Fig.76.This design is three-roller working stand reduction mill contains a one piece casing located therein a cylindrical shaft mounted drive rollers, conical gears and bearings, sealing elements, which are fastened by bolts to the inner surface of the window casing and pairs of close nodes gears, with each pair of elements are interconnected by welding.A disadvantage of the known designs stand reduction mill is the complexity of the repair and time-consuming to change rolls, to replace gears and bearings when planned maintenance or in emergency situations, caused by the failure of any parts, etc.The next disadvantage is the unreliability of these seals, as there is no database to install them. This reduces the durability of bearings and gears, and thus only reducing mill.In addition, this crate has a large size along the axis of rolling, which are determined by the size of the sealing elements.The present invention is to increase its reliability and durability, and maintainability.The next task of the present invention is to reduce the size of the cage along the axis of rolling, which will increase the technological characteristics of the mill and reduce waste.This object is achieved in that in a three-roller working stand reduction mill, comprising a housing located therein a cylindrical shaft mounted drive rollers, conical gears and bearings and sealing elements, according to the invention the body of the cage is made of two halves that are connected by bolts and sealing elements from rolls consist of separate blocks and installed in bore, performed on both halves of the body, with each cylindrical shaft is made with a hollow bore, coaxially to its axis and provided with a thrust, mounted in this bore and compression between the bearings, and tapered roller gear.Such constructive implementation of three-roller working stand reduction mill will improve the maintainability of the cage, as well as to simplify and reduce the time for replacement of the rolls. This is achieved by executing the body of the cage of the two halves, and plotsimilarity the pulling shaft when changing rolls.In addition, by performing the sealing elements according to the formula of the invention decrease the openings in the housing cage, increasing the rigidity and reduced size of the cage along the axis of rolling, and therefore, increase the technological characteristics of the mill and reduced leaf waste.To illustrate the invention the following is a specific example of carrying out the invention with reference to the drawings, in which: Fig. 1 shows a three-roll working crate reducing mill; Fig.2 - section a-a in Fig.1.Three-roller working crate reducing mill includes a housing made of two halves 1, 2, connected by bolts 3, 4, situated in the body of the cylindrical rollers 5 mounted drive rollers 6, bevel gears 7 and bearing assemblies 8, 9, and sealing elements 10, 11.Sealing elements 10 installed on the side of the rolls 6, consist of separate units and are located in the bores 12, performed on both halves 1, 2 of the casing. Each cylindrical shaft 5 is made with a hollow bore 13, coaxially to its axis, which has thrust 14, the tightening between the bearings 8, 9, roll 6 and the conical gear.Drive od is 7, mounted on the shafts 5 of the respective rollers 6. In the case of the cage has openings 16.The device operates as follows: To change the rolls 6 case stands disconnected from the actuator (not shown), is mounted on a special stand, to pull 14 is connected to the hydraulic cylinder and cylindrical shafts 5 are extracted from the body of the cage, after which the rollers 6 are removed from the cage through the openings 16, is made in the case.Installation of new roll 6 is in the reverse sequence.To replace the seals take out the shafts 5, then rolls a 6, and then sealing elements 10, 11.To replace the bearing supports 8, 9 and bevel gears 7 two halves 1, 2 buildings stand to be separated, after which the bearings 8, 9 together with the sealing elements 10, 11 is extracted from the bores of the housing cage.The proposed three-roller working crate reducing mill in comparison with the known will reduce the time for replacement of the rolls, to increase maintainability in reliability. In addition, the proposed design of the stand will allow you to reduce the size of the cage along the axis of rolling, which will increase the technological characteristics of the mill and reduce leaf waste.
FIELD: equipment for plastic working of metals, namely stands for profiling tubes.
SUBSTANCE: universal four-roll stand for profiling tubes includes chocks with rolls arranged in one diametrical plane and mounted on Г-shaped supports tightened at inlet and at outlet by means of rings. Said chocks are mounted with possibility of moving in said plane pairs of cylindrical horizontal and vertical rolls of predetermined diameters forming roll grooved pass with changeable configuration and cross section area. Horizontal rolls are driven ones; lower roll may move crosswise towards profiling axis. Screw-down mechanisms and elastic members are mounted in supports at mutually opposite sides for moving chock-cartridges. Said elastic members are arranged at side of drive of horizontal rolls. Cylindrical compression sprigs are used as elastic members; said springs are arranged between outer edge of supports and chocks and they embrace drive portion of shaft of horizontal rolls.
EFFECT: improved quality of articles, enlarged technological possibilities of stand, lowered labor consumption due to simplified adjustment of stand.
2 cl, 1 dwg, 1 ex
FIELD: equipment for producing rolled pieces, namely working stands of continuous wide strip hot rolling mills.
SUBSTANCE: working horizontal and vertical rolls are mounted in the same diametrical plane and they are made with possibility of predetermined motion in said plane for restricting closed variable rectangular cross section pass whose mean portion coincides with lengthwise axis of rolling process. Backup rolls, lower horizontal roll and one vertical roll may be moved in horizontal plane across lengthwise axis of rolling process. Upper horizontal roll and other vertical roll may be moved in such a way as above mentioned rolls and in addition along vertical line. Motion values of all rolls in horizontal plane are the same. Each vertical roll has flat end engaging with barrel of respective horizontal roll. Width of vertical rolls consists of 0.28 - 0.30 of their diameters. Each vertical roll is mounted in one bearing unit arranged at side of roll opposite to its flat end. Length of barrel of backup rolls is equal to lp + Δ where lp - length of barrel of horizontal roll, Δ - maximum value of motion of roll in horizontal plane.
EFFECT: reduced metal consumption for producing hot rolled sheet steel due to lowered quantity of crop.
3 cl, 1 dwg, 1 ex
FIELD: metallurgy.
SUBSTANCE: rolling mill contains pedestal, stand beds, where there are located with ability of radial and axial adjustment horizontal and vertical rolls with frictionless bearing, cushions, end covers and driver of horizontal and vertical rolls, including electric motors and parallel-shaft reducer. Profiling of any closed profiles complex by sectional shape, ability of rolling hardly-deformed metals and alloys is provided ensured by increasing of deformation uniformity by section of blanks by means of that on pedestal with ability of pivot turn, parallel rolling axes, it is located supporting pole for installation of driver of horizontal and vertical rolls, drivers of horizontal rolls are located at the one side of mill axis, output shaft of vertical roll from the side of horizontal rolls driver is displaced relative to this roller, and top cushion of its vertical roll contains engaged gears, one of which is fixed on shaft of roll, and other - on output control shaft. Mills have squared shape with vertical wall, in which there are implemented rectangular grooves for placement beveled roll chock and clamping wedges.
EFFECT: enhancement of equipment manufacturing capabilities and range of manufactured products.
5 cl, 7 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to metallurgy, namely to rolling and can be used to produce rails and H-sections. Proposed mill stand comprises two horizontal rollers, two vertical rollers fitted in C-like pads and mechanisms to move said rollers along and across rolling direction. Every horizontal roller is arranged in cartridge fitted in C-like pad fixed in lengthwise direction and can move along or across rolling direction. Note here that cartridge width in lengthwise direction is smaller than respective width pad by vertical roller axis travel.
EFFECT: displacement of vertical roller axes relative to plane of horizontal roller axes and displacement of vertical roller along or across rolling direction.
4 dwg
