WO2013185630A1

WO2013185630A1 - Multi-roll planetary changeable combined mill and principle

Info

Publication number: WO2013185630A1
Application number: PCT/CN2013/077237
Authority: WO
Inventors: 张少渊; 张晓宇
Original assignee: 程玳纹; 张晓星
Priority date: 2012-06-15
Filing date: 2013-06-14
Publication date: 2013-12-19
Also published as: CN102716909A; CN102716909B

Abstract

A multi-roll planetary changeable combined mill comprises a roll complex (30), an upper rack (10), a lower rack (20), transmission devices (40, 50) and a screw-down device (60). n roll complexes with left and right supports are installed on the upper and the lower racks, the n roll complexes being radially and uniformly distributed with the cross section of a rolled piece as a center. The mill structure is reliable and reasonable, and has simple parts; a great number of rolls can synchronously and centripetally rotate, can be manually or automatically screwed down, and are convenient to change and guarantee reliable transmission; many forms of continuous rolling groups can also be formed; and the multi-roll planetary changeable combined mill can be used for rolling extremely large or small bars, pipes, profiled bars or wires.

Description

Multi-roller star-shaped multi-variable combined rolling mill and principle

[0001] The present invention relates to a metal rolling machine commonly known as a rolling mill, in particular, a method in which a plurality of rolls are centered along a section of a rolled piece, and are radially radiated uniformly in a 360° cylindrical space, and can be based on rolling stock Shape change roll shape, quantity and combination method, used for rolling bars, wires, pipes and profiles, can be used for multi-roll multi-purpose Xingyu multi-variable combined rolling mills for room temperature cold rolling, warm rolling and hot rolling.

Background technique

[0002] Metal calendering processes and calendering equipment, especially the development of rolling mills after two hundred years of development, have been greatly developed; the current annual production of steel in China is close to 700 million tons, plus the quantity of various non-ferrous metals and alloys. It is even more huge. More than 90% of these metals are produced in various shapes of cold materials. They are produced by various pressure processing methods such as forging, extrusion, drawing and rolling, among which rolling Nearly 90% of the process products are produced by a variety of two-roll mills; according to the rolling principle of the two-roll mill: When the rolling stock is bitten by two rotating rolls, the rolling is calendered, The section of the rolled piece is accompanied by wide-spread, and the wide-spread parts are divided into two categories. One is useful wide-spreading, such as rolled sheets and strips, the wide spread is retained, and the other is useless wide spread. People have to do everything possible to limit it, because the useless widening reduces the rolling efficiency and increases the rolling pass. Therefore, in order to control and reduce the widening of the metal section during the rolling process, the efficiency of the rolling process is improved. A 120-degree three-roll Y-roll mill that rolls the same section from three directions in the circumferential direction and a four-roller cross-type universal mill that rolls the same section from four directions in the circumference are naturally born.

[0003] The inventors of the present invention have studied the two types of rolling mills eagerly, and applied for the "single drive shaft three-roll Y-type adjustable rolling mill" with the patent number "ZL200520072640.X", which solved the input of a single drive shaft by 120°. In the closed box of the three-roll Y-type rolling mill, the three rolls are synchronously rotated and the complex adjustment mechanism of synchronous centripetal pressing and lifting during the rotation process; also applied for the "double drive shaft" patent number "ZL200810099538.4" The four-roller cross-type adjustable universal mill "has obtained the authorization of the invention patent. This patent solves the problem of simultaneous centripetal pressing and lifting of the four rolls rotating at 90° cross centroid during the rotation process. Although the two types of rolling mills can greatly reduce the width of the section during the rolling process, the width of the rolling mill is still not negligible, and the above-mentioned rolling mills are all closed, and the rolls are synchronously pressed by the centriles. Rolls have been complicated, and the structure will be very complicated if the number of rolls is increased. Therefore, designing a structure is as simple as a conventional two-roll mill, and the roll transmission adjustment and replacement are simple and convenient, and the multi-roll mill that controls the wide rolling effect of the rolled piece becomes the research object of the inventor of the present invention. [0004] The search for equipment that optimizes the most efficient metal calendering process has always been a dream of technicians and companies in the industry at home and abroad, and the present invention attempts to add a step to this dream.

Summary of the invention

[0005] The problem to be solved by the present invention is to provide a rolling mill in which one or more structures are simple, reliable, practical, and easy to implement, in a 360° cylindrical space, radially radiating n rolls uniformly around the rolling stock.

[0006] In order to achieve the above object, the technical problem to be solved by the present invention is to provide a multi-roller star with a reliable and reasonable structure, a plurality of rolls that can be rotated synchronously, a roll that can be manually or automatically pressed, a roll that is easy to replace, and a reliable drive. Yu type multi-variable combined rolling mill.

[0007] The technical solution of the present invention is: a multi-roller star-shaped multi-variable combined rolling mill, comprising a roll combination body, an upper frame, a lower frame, a transmission device and a pressing device, the roll combination body and the transmission The device is installed in the upper frame and the lower frame, and the pressing device is a pressing device mounted on the top of the upper frame to drive the upper frame as a whole to move down;

The roll combination body is composed of an outer roller ring, an inner roller ring, a left bevel gear, a right bevel gear, a spindle and a bolt, and the inner hole of the outer roller ring is integrally connected with the inner roller ring by a detachable connection, and the left cone The gear and the bevel gear are respectively disposed on the left and right end faces of the inner roller ring, and are integrally fastened by bolts passing through the left bevel gear, the inner roller ring and the right bevel gear, and the inner ring of the inner roller ring is installed at the inner hole a bearing that receives radial force and axial force, the inner hole of the bearing is mounted with a mandrel, and the left and right brackets of the mandrel of the roll combination body are respectively respectively installed, and the bolts respectively press the left bracket and the right bracket to the middle Solid, the left bracket and the right bracket are provided with a boss at the joint of the mandrel, and the end faces of the two bosses clamp the bearing from the left and right sides;

The upper frame and the lower frame are mounted with n roll joints with left and right brackets distributed radially around the section of the rolled piece, wherein n is a natural number greater than or equal to 2;

The roll combination mounted on the upper frame or the lower frame rotates synchronously and centripetally under the driving of the transmission device, and the transmission drives the left bevel gear or the right bevel gear of a certain roll combination, the roll combination a right bevel gear or a left bevel gear meshes with a left bevel gear and a right bevel gear of an adjacent roll combination thereof, whereby adjacent bevel gears on adjacent roll combinations of other roll combinations on the drive chain are mutually Engage.

[0008] The invention can further be:

The transmission device includes a bearing seat fixedly coupled to the frame, the bearing housing is provided with a transmission shaft, and the input end of the transmission shaft is provided with a coupling connected to the transmission system, and the output end of the transmission shaft is provided Have and The bevel gear that the roll combination meshes.

[0009] One end of the upper frame is mounted with a transmission device, and the bevel gear of the transmission device meshes with a left bevel gear or a right bevel gear of a roll combination body on the side of the upper frame near the transmission device, and the upper frame is on the upper frame. Adjacent bevel gears on the adjacent roll combination are intermeshing to achieve synchronous centripetal rotation of each roll combination; the other end of the lower frame is mounted with another transmission, the bevel gear and the lower frame of the transmission The right bevel gear or the left bevel gear of the roll combination body on the side of the transmission is engaged, and the adjacent bevel gears of the adjacent roll combination on the lower frame are meshed with each other to realize the synchronous centripetal rotation of each roll combination.

[0010] the upper frame is provided with two or more transmission devices, the transmission devices are synchronously rotated, and each transmission device drives its adjacent one or more sets of roll assemblies to rotate synchronously to the center; The lower frame is also provided with two or more transmissions, and the transmissions rotate synchronously, and each transmission drives its adjacent one or more sets of roll assemblies to rotate synchronously.

[0011] The lower frame, the upper frame and the pressing device may employ a lower frame, an upper frame and a pressing device of various other two-roll mills other than the cantilever type two-roll mill.

[0012] four corners of the lower frame are respectively provided with four pillar holes, four corners of the upper frame are correspondingly provided with four pillar holes, and the upper frame and the lower frame pass through the column The four pillars of the hole are connected, and a balance spring is sleeved on the pillar between the upper frame and the lower frame.

[0013] The inner ring of the outer roller ring and the inner roller ring are connected by a curved key or the inner hole of the outer roller ring is provided with an internal thread, and the outer peripheral portion of the inner roller ring is provided with the same External thread.

[0014] The upper frame and the lower frame are mounted with n roll joints with left and right brackets radially distributed around the section of the rolling piece, and m belts are evenly mounted on the upper frame a roller combination body having left and right brackets, wherein the lower frame is evenly mounted with nm roll assemblies with left and right brackets, wherein an angle between the radial centerlines of adjacent roll assemblies is ^, where m is less than The natural number of n.

a

[0015] The outer roller ring may be a roll, a disc cutter or a grinding wheel.

[0016] the outer peripheral portion of the outer roller ring is inwardly recessed in an arc shape, so that the outer peripheral portions of the n outer roller rings are combined into a circular cross section through which the cross section of the rolled piece can pass; or the outer peripheral portion of the outer roller ring is straight, A fold line or an arbitrary curve is used to combine the outer peripheral portions of the n outer roll rings into a profiled surface through which the cross section of the rolled piece can pass.

[0017] the upper frame or the lower frame is provided with a groove for mounting the roll combination body and the left and right brackets thereof, and the groove is provided with a tightness for fixing and adjusting the roll combination body and the left and right brackets thereof Solid bolt and adjustment Screw.

[0018] The upper frame and the lower frame are mounted with n roll joints with left and right brackets radially distributed around the section of the rolled piece, and when n tends to be infinite, the roll joints The rollers are arranged in parallel, and the roll combination body is composed of an outer roller ring, an inner roller ring, a left chainring, a right chainring, a spindle and a bolt, and the inner hole of the outer roller ring is connected to the inner roller ring by a detachable connection. In one piece, the left and right sprocket wheels are respectively disposed on the left and right end faces of the inner roller ring, and are integrally fastened by bolts passing through the left sprocket, the inner roller ring and the right sprocket, and the adjacent roller combination body Adjacent toothed discs mesh with each other.

[0019] Further:

The multi-roller Xingyu multi-variable combined rolling mill is a reversible or irreversible rolling mill. Multiple Xingyu-type multi-variable combined rolling mills can be formed into a continuous rolling mill or a reciprocating pipe with a mandrel and a profiled rolling mill. Bars, tubes, wires or profiles of extremely large or very small gauges; thin and extremely thin tubes or shaped pipes can also be rolled.

[0020] The invention has the advantages that: the structure is simple, the upper and lower frames of the ordinary two-roll mill can be directly used, and the roll combination body and the bracket thereof are fixedly mounted on the frame, and several rolls are required for rolling to be radially installed. Several rolls are easy to assemble and disassemble, and the pressing device is installed above the frame of the upper frame to press down the roll assembly mounted on the upper frame and the upper frame to realize the adjustment of the roll gap; The outer roller ring and the inner roller ring are detachably connected. By removing m outer roller rings in the n roll combinations, the n-roll star-type multi-variable combined rolling mill can be arbitrarily modified into a nano-roller star-shaped type. The variable-stack rolling mill meets the needs of various rolling; the outer roller ring can be changed into a grinding wheel and a milling cutter, and the rolling mill can be converted into a grinding device or a milling machine for various purposes.

DRAWINGS

1 is a schematic structural view of a first embodiment of the present invention.

2 is a side view of FIG. 1.

FIG. 3 is a schematic structural diagram of Embodiment 2 of the present invention.

detailed description

[0024] Referring to FIG. 1 and FIG. 2, the first embodiment preferably has a n=6 six-roll star multi-variable combined rolling mill, including a roll assembly 30, an upper frame 10, a lower frame 20, and a left transmission device. 40. The right transmission device 50 and the pressing device 60 are installed in the upper frame and the lower frame, and the pressing device is mounted on the top of the upper frame to drive the upper frame as a whole. The moving reduction device, wherein the six roll assemblies are 30A, 30B, 30C, 30D, 30E, 30F, respectively. [0025] In order to achieve the object of the invention, one of the problems first solved by the present invention is the structure of the roll, that is, the working part of the rolling: the part in contact with the rolling piece is the outer roll ring, the roll combination body is surrounded by the outer roll ring 31, The roller ring 32, the left bevel gear 34, the right bevel gear 35, the spindle 37 and the bolt 36, the inner hole of the outer roller ring is integrally connected with the inner roller ring by a curved key 33, the left bevel gear and the bevel gear They are respectively disposed on the left and right end faces of the inner roller ring, and are integrally fastened by bolts passing through the left bevel gear, the inner roller ring and the right bevel gear, and the inner ring of the inner roller ring is mounted with a radial force and An axial force bearing 38, the inner hole of the bearing is mounted with a mandrel, and two ends of the mandrel of the roll combination body are respectively equipped with a left bracket 391 and a right bracket 392, and a plurality of bolts respectively fasten the left bracket and the right bracket to the middle, The left bracket and the right bracket are provided with a boss at the joint of the mandrel, and the end faces of the two bosses clamp the bearing from the left and right sides to prevent the roll joint from swaying left and right, and the left and right brackets are locked by a plurality of fastening bolts 201. Integral, adjust the left and right by adjusting the screw 202 Commonwealth roll frame and horizontal and radial position, the roll stand to ensure that the left and right end faces are not contacting the consortium to ensure roll complex may be freely rotated.

[0026] The second problem to be solved is the structure of the rack: the upper frame and the lower frame are centered on the section of the rolling stock, each occupying half of the space, and three on the upper frame can be used for mounting the roll combination 30D, 30E. , 30F and the groove of the left and right brackets, the center line of the three grooves is radiated to the center at a 60° angle. The shape and size of the groove are similar to those of the roll combination with the left and right brackets. The structure of the lower frame and the upper machine The frame is basically the same, the bottom surface of the upper frame faces upwards, the split surface faces downward, and the front surface is open; the bottom surface of the lower frame faces downward, the split surface faces upward, the front surface is open, and the four corners of the lower frame are respectively opened four Column holes, four corners of the upper frame are correspondingly provided with four column holes, and the upper frame and the lower frame are connected by four columns 70 passing through the column holes, the upper frame and the lower frame A balance spring 90 is sleeved on the column between the frames, wherein the two ends of the four columns are respectively threaded, and are respectively fixedly connected with the upper frame and the lower frame by a lock nut 80.

[0027] The third problem to be solved is how the roll combination body is loaded into the frame: For the above frame, for example, the roll combination body is loaded into the groove of the upper frame from the front side, and the left and right sides of each adjacent roll combination body The bevel gears mesh with each other, and the fastening bolts for fixing the roll combination body and the left and right brackets thereof and the adjusting screws for adjusting the radial position of the roll combination and the position of the left and right brackets are ensured on the premise that the bevel gears mesh with each other. The side gap of the outer roller ring of each adjacent roll combination is as small as possible.

[0028] The fourth problem to be solved is the synchronous concentric rotation of the roll combination: as shown in FIG. 1, the left end of the upper frame is mounted with a left transmission device, and the left transmission device includes a bearing seat 43 fixedly coupled to the frame, A drive shaft 42 is arranged in the bearing housing, and the transmission shaft can be connected to the reducer and the motor through the coupling 44 as an upper The main drive of the frame, the bearing seat on the left transmission is bolted to the split surface of the upper frame, and the bevel gear 41 of the left transmission meshes with the left bevel gear of the rightmost roll combination 30F of the upper frame The rolling combined body 30F is rotated, the right bevel gear of the rolling combined body 30F meshes with the left bevel gear of the rolling complex 30E, and the rolling combined body 30E is rotated, and the right bevel gear of the rolling combined body 30E is combined with rolling. The left bevel gear of the body 30D engages and drives the rolling combined body 30D to rotate, and the transmission chain of the upper frame completes the transmission, and the three rolling complexes are synchronously rotated centripetally; the bearing seat 53 on the right transmission device is also the same. The bolt is connected to the right side of the split surface of the lower frame, and the bevel gear 51 on the right transmission drive shaft 52 is meshed with the right bevel gear of the rightmost roll combination 30C of the lower frame, and synchronously moved. 30C, 30B, 30A synchronous centripetal rotation.

[0029] The fifth problem to be solved is the roll pressing method and the pressing device: It can be seen that three roll combination of centripetal radiation distribution is installed in the upper frame, and only side gaps between adjacent rolls are present, and there is no Under the condition of pressing, the three roll assemblies installed in the lower frame are also distributed by centripetal radiation. There is only side clearance between adjacent rolls, and there is no pressing condition, and the upper frame and the lower frame are The column is connected through the joint, and a balance spring is arranged between the upper and lower frames to support the upper frame, so that the upper frame can be floated up and down; therefore, the pressing device is installed on the top of the upper frame, wherein the pressing device can be manually pressed, Hydraulic pressure reduction, pneumatic pressure reduction, etc. can be used to adjust the change of the distance between the upper frame and the lower frame, that is, the change of the roll gap.

[0030] It can be seen that the multi-roller star-shaped multi-variable combined rolling mill of the present invention provides a new rolling principle, that is, each of the rolls bears the bite and pressure of the area relative to the section of the rolled piece. The "single-roll rolling" of the lower, wide-spreading and extending tasks, and the other nl rolls which are uniformly distributed radially around the rolling section as the supporting rolls, can be regarded as a collection of numerous "single-roll rolling" The body makes the rolling mill have the pressing characteristics of a common two-roll mill.

[0031] The sixth problem to be solved is that the combination of the rolling mill is variable: the inner hole of the outer roller ring is connected with the inner roller ring by a curved key, or the inner hole of the outer roller ring is provided with an internal thread, the inner The outer peripheral portion of the roll is provided with an external thread matched thereto, and the outer roll ring may be a roll, a disc cutter, a grinding wheel or other working carrier, and the outer peripheral portion of the outer roll ring is inwardly recessed in an arc shape so that n The outer peripheral portion of the outer roller ring is combined into a circular cross section through which the cross section of the rolled product can pass; or the outer peripheral portion of the outer roller ring is in a straight line, a broken line or an arbitrary curve, so that the outer peripheral portions of the n outer roll rings are combined into one to be rolled The profiled surface through which the section passes.

[0032] The outer roller ring can be removed or changed shape to recombine the Xingyu multi-variable combined rolling mill, truthfully The 6-high rolling mill of the first embodiment can be changed into a 5-roll, a 4-roll, a 3-roll, a 2-roll mill by removing the outer roll ring, and the change of the shape of the outer roll ring can be used for rolling the profiled material, and converting the outer roll mix into a disk shape. Milling cutters, grinding wheels or other working carriers can be used for grinding and machining.

Referring to FIG. 3, the second embodiment preferably has a twelve-roller multi-variable combined rolling mill of n=12, including an upper frame 10, a lower frame 20, and a roll combination 30A, 30B, 30C, 30D. 30E, 30F, 30G, 30H, 301, 30J, 30K, 30L, left transmission 40, right transmission 50, sealing device 110 and mandrel 113.

[0034] The upper frame is halved in a space from 15 ° to 165 °, that is, each groove is machined at 30°, and the shape and size of the groove are similar to those of the roll combination with left and right brackets. The center line of the groove is radially radiated, so that 30G, 30H, 30J, 30K, 30L, 30Μ are placed in the groove, and the left and right bevel gears of the adjacent roll combination are kept in meshing state, and then the platen is held. 100 respectively cover the base of each roll combination body with left and right brackets, and lock the pressure plates on the upper frame by using a plurality of screws 90, and the adjusting screws 80 can finely adjust the radial positions of the respective roll combination parts, respectively The screws on the side of the bracket can fine-tune the axial position of the individual roll combination components with respect to the mandrel so that the adjacent bevel gears maintain the optimum meshing clearance and the side clearance of the adjacent roll combination is minimal. Finally, the roll combination is combined with The left and right brackets and the base are fixed together on the upper frame, and the bevel gear of the left transmission meshes with the left bevel gear of the roll combination 30L to drive 6 rollings in the upper frame. Commonwealth of synchronized rotation to the heart; processing installation rack and the rack at the same reason.

[0035] As the number of roll assemblies increases, there may be insufficient torque in the left and right transmissions, in which case one or more sets of transmissions can be inserted in the upper or lower frame, the transmission The device drives a left bevel gear or a right bevel gear of a roll combination, the right bevel gear or the left bevel gear of the roll combination meshes with the left bevel gear and the right bevel gear of the adjacent roll combination, and accordingly the transmission The adjacent bevel gears on the adjacent roll combination in the other roll combination on the chain are meshed with each other. As long as the respective transmissions on the rolling mill are synchronously rotated, the respective roll combination can be synchronously rotated, in the second embodiment. The six roll assemblies in the upper frame can be divided into two groups, each of which drives three roll assemblies to rotate, and the pressing method still uses the upper frame and the six roll assemblies mounted on the upper frame. Collectively press down; the lower frame also adds a set of drive systems in the same way to compensate for the lack of torque.

[0036] When rolling a large-diameter thin-walled pipe, the section rigidity of the rolled piece itself cannot withstand the rolling pressure, and the inner hole of the pipe needs to be inserted into the mandrel 113, and the unidirectional rolling can be performed, or the reciprocating rolling can be performed in both forward and reverse directions. , can also be taken Multi-stand reciprocating continuous rolling; if the rolled special-shaped pipe can also be rolled by a special-shaped mandrel. When the number of roll-combined bodies is less than or equal to 8, it is called multi-roller star-type combined multi-variable rolling mill, when the roll combination When the number is greater than 8, it is called a multi-roller type combined multi-variable rolling mill, wherein the plurality of rolls can be determined according to the number of specific roll combinations.

[0037] The following is a detailed description of the rolling principle of a multi-roller star-shaped multi-variable combination mill: The current mill structure is considered and designed to assume that each roll of the multi-roll mill should be individually centripetal and should be synchronized. Under the same amount of pressure, this is a misunderstanding of the idea, which leads to the complicated structure of the pressing system. The multi-roller star-shaped combined multi-variable rolling mill is used for collective pressing. From the macroscopic view, it can be seen that multiple rolls roll the same metal together. In terms of microscopic view, it is a number of "single-roll mills" or several "two-roll mills" rolling the same metal section. For the same metal section to the multi-roll mill, each roll bears the section of the section it touches. The rolling task, that is, biting, pressing, extending and widening, it is necessary to find the supporting object of the force when it performs the rolling task. If other rolls are collectively used as the supporting object of one of the rolls, the star type The combined multi-variant rolling mill can be regarded as a collection of many "single-roll mills". If the roller opposite to 180° is used as the supporting object of the force application, it can be regarded as The assembly of multiple "two-roll mill" rolling; therefore, the multi-roller-type combined multi-change mill can achieve biting for each roll combination regardless of whether the multi-roller collective press or the single-roll centripetal press , pressing, extending, and wide-ranging tasks.

[0038] Since a plurality of rolls are synchronously centripetally rolled around the section of the rolled piece, for each pair of rolls, the position of the section of the rolled piece is restricted, and pressure is applied to the section, and each roll contact section is The area of the roll is small, and the amount of individual roll reduction of each roll is small, so that the partial width of the metal section caused by the reduction of the i is relatively smiling, and the slight width of the section is difficult to drive or The overall width of the cumulative section, therefore, the multi-roll rolling close to zero width has been realized; at the same time, the multi-roller radial rolling, for high-alloy steel and other difficult-to-deformed alloys can improve its cold rolling Plasticity can effectively prevent rolling.

[0039] The present invention also proposes a novel gear transmission structure, which removes the outer roller rings of the roll combination body, and the transmission device and the synchronous roll center rotating roller driven by the transmission device become a A gear transmission structure that relies on an adjacent back-to-back bevel gear or bevel disk to engage an adjacent pair of bevel gears or bevel gears disposed back to back to achieve torque transmission.

The above description is only the preferred embodiment of the present invention, and all changes and modifications made to the scope of the present invention should fall within the scope of the present invention.

Claims

Claim

A multi-roller star-shaped multi-variable combined rolling mill comprising a roll combination body, an upper frame, a lower frame, a transmission device and a pressing device, wherein the roll combination body and the transmission device are mounted on the upper frame and the lower portion In the rack, the pressing device is a pressing device mounted on the top of the upper frame to drive the upper frame as a whole to move down;

The roll combination body is composed of an outer roller ring, an inner roller ring, a left bevel gear, a right bevel gear, a spindle and a bolt, and the inner hole of the outer roller ring is integrally connected with the inner roller ring by a detachable connection, and the left cone The gear and the right bevel gear are respectively disposed on the left and right end faces of the inner roller ring, and are integrally fastened by bolts passing through the left bevel gear, the inner roller ring and the right bevel gear, and the inner ring of the inner roller ring is installed at the inner hole a bearing that receives radial force and axial force, the inner hole of the bearing is mounted with a mandrel, and the left and right brackets of the mandrel of the roll combination body are respectively respectively installed, and the bolts respectively press the left bracket and the right bracket to the middle Solid, the left bracket and the right bracket are provided with a boss at the joint of the mandrel, and the end faces of the two bosses clamp the bearing from the left and right sides;

2 . The multi-roller-type multi-variable combined rolling mill according to claim 1 , wherein: the transmission device comprises a bearing seat fixedly coupled to the frame, wherein the bearing housing is provided with a transmission shaft, The input end of the drive shaft is provided with a coupling connected to the transmission system, and the output end of the drive shaft is provided with a bevel gear that meshes with the roll combination.

3. The multi-roller-type multi-variable combined rolling mill according to claim 1 or 2, wherein: one end of the upper frame is mounted with a transmission, and the bevel gear of the transmission is close to the upper frame The left bevel gear or the right bevel gear of the roll combination body on one side of the transmission meshes, and the adjacent bevel gears on the adjacent roll combination bodies on the upper frame mesh with each other to realize synchronous centripetal rotation of each roll combination; The other end of the frame is mounted with another transmission device, the bevel gear of the transmission meshes with the right bevel gear or the left bevel gear of the roll assembly on the side of the lower frame near the transmission, and the adjacent rollers on the lower frame The adjacent bevel gears under the union are intermeshing to achieve synchronous centripetal rotation of the respective roll combination.

The multi-roller-type multi-variable combined rolling mill according to claim 1 or 2, wherein: the upper frame is provided with two or more transmission devices, and the transmission devices are synchronously rotated. Each of the transmissions drives its adjacent one or more sets of roll assemblies to rotate synchronously to the center; the lower frame is also provided with two or more transmissions, each of which rotates synchronously, each The transmission drives the adjacent one or more sets of roll assemblies to rotate synchronously.

5. The multi-roller-type multi-variable combined rolling mill according to claim 1, wherein: the lower frame, the upper frame and the pressing device are different from the cantilever type two-roll mill. The lower frame of the two-roll mill, the upper frame and the pressing device.

6. The multi-roller-type multi-variable combined rolling mill according to claim 5, wherein: four corners of the lower frame are respectively provided with four pillar holes, and four corners of the upper frame There are four column holes correspondingly, and the upper frame and the lower frame are connected by four columns passing through the column holes, and a balance spring is sleeved on the column between the upper frame and the lower frame.

7. The multi-roller-type multi-variable combined rolling mill according to claim 1, wherein: the inner ring of the outer ring and the inner ring are connected by a curved key or the outer ring The inner hole is provided with an internal thread, and the outer peripheral portion of the inner roller ring is provided with an external thread cooperating therewith.

8. The multi-roller-type multi-variable combined rolling mill according to claim 1, wherein: the upper frame and the lower frame are mounted with n radially distributed uniformly around the section of the rolled piece. a roll combination body with left and right brackets, wherein the upper frame is evenly mounted with m roll assemblies with left and right brackets, and the lower frame is uniformly mounted with nm roll assemblies with left and right brackets, wherein The angle between the radial centerlines of adjacent roll assemblies is ^, where m is a natural number less than n.

n

9. The multi-roller-type multi-variable combination mill according to claim 1, wherein: the outer roll ring is a roll, a disc cutter or a grinding wheel.

10. The multi-roller-type multi-variable combined rolling mill according to claim 9, wherein: the outer peripheral portion of the outer roller ring is inwardly recessed in an arc shape, and the outer peripheral portions of the n outer roller rings are combined into one. A circular cross section through which the cross section of the rolled piece can pass; or the outer peripheral portion of the outer roll ring is a straight line, a broken line or an arbitrary curve, so that the outer peripheral portions of the n outer roll rings are combined into a profiled surface through which the cross section of the rolled piece can pass.

The multi-roller-type multi-variable combined rolling mill according to claim 1, wherein: the upper frame or the lower frame is provided with a groove for mounting the roll combination body and the left and right brackets thereof. On the groove There are fastening bolts and adjusting screws for fixing and adjusting the roll combination body and its left and right brackets.

12. The multi-roller-type multi-variable combined rolling mill according to claim 1, wherein: the upper frame and the lower frame are mounted with n radially distributed uniformly around the section of the rolled piece. a roll combination with left and right brackets, wherein the roll combination is arranged in parallel when n tends to be infinite, the roll combination being composed of an outer roll ring, an inner roll ring, a left chainring, a right chainring, a mandrel and The inner hole of the outer roller ring is integrally connected with the inner roller ring by a detachable connection, and the left and right toothed disks are respectively disposed on the left and right end faces of the inner roller ring, and are passed through the left toothed disc, The bolts of the roller ring and the right toothed disc are fastened together, and the adjacent toothed discs on the adjacent roll combination are in mesh with each other.