CN108004393B

CN108004393B - Roller and roller type distributing device comprising same

Info

Publication number: CN108004393B
Application number: CN201711376899.7A
Authority: CN
Inventors: 肖跃军
Original assignee: Hunan Zhongzhi Changtian Heavy Industry Technology Co ltd
Current assignee: Hunan Zhongzhi Changtian Heavy Industry Technology Co ltd
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2024-05-31
Anticipated expiration: 2037-12-19
Also published as: CN108004393A

Abstract

The invention relates to the technical field of rollers, and provides a roller and a roller type distributing device comprising the roller. The roller comprises a roller body and a roller neck which is arranged at the end part of the roller body and can drive the roller body to rotate, and the roller body comprises a roller sleeve and a roller core which is arranged in the roller sleeve. The roller comprises a roller sleeve and a roller core, wherein the roller sleeve is required to meet the abrasion requirement, the roller core is not required, and the roller core only needs to be supported. Therefore, on the basis of meeting the strength and rigidity requirements of the roller body, the roller sleeve and the roller core are made of different materials, so that the manufacturing cost of the roller can be reduced, and the waste of scarce and precious resources when the roller is scrapped is avoided.

Description

Roller and roller type distributing device comprising same

Technical Field

The invention relates to the technical field of industrial metallurgy, in particular to a roller and a roller type distributing device comprising the roller.

Background

Currently, with the great increase of the productivity of steel in China, the main raw material resources for smelting are gradually and gradually shortened, and the raw material structure of the sinter of the sintering plants of all steel enterprises is greatly changed. Some of the fine concentrate, and some even the majority of the fine concentrate, is added to the raw materials of many sintering plants. In many cases the fine concentrate is even from several different producing areas, belonging to different varieties. Meanwhile, in order to fully utilize a heat source and reduce consumption of fuel (mainly pulverized coal), a mixture reinforced granulating technology and a thick material layer low-temperature induced draft sintering technology are commonly adopted in each sintering plant at present, and therefore, higher requirements are put on a material distribution technology of a roller distributor matched with a sintering machine.

Because the sintering machine is a process of ignition from the upper surface and gradually burning downwards, the automatic heat accumulation phenomenon of the material layer exists in the sintering process, and the heat at the upper part of the sintering layer is usually insufficient, and the heat at the lower part is excessive, so that the quality of the sintering ore is easily uneven. This tendency is more serious especially when thick layers are sintered.

Referring to fig. 1, in the process of distributing the material by the roller type distributor 001, the damage to the granulation of the mixture is required to be less, the granularity segregation of the mixture at the upper, middle and lower parts of the material layer (seen from the cross section) is reasonable, namely, the granularity segregation meets the upper and lower size rules, and the material surface is uniform and flat, so that the material layer is ensured to have good air permeability, the sintering temperatures of the upper and lower layers are ensured to be basically the same in the sintering process, and the quality of the sintered ore is balanced and stable.

As the main equipment for distributing materials to the sintering machine trolley in the thick material layer sintering process, the roller type distributing device 001 is arranged below a round roller feeder or other feeding equipment of the sintering machine, and has the functions of uniform screening and segregation distribution through the inclined installation angle, the rotation of the rollers and the gap effect between the rollers. The iron-containing ore powder mixture which is added with various ingredients and evenly mixed and granulated is continuously discharged from the mixing bin to the roller of the roller type distributing device 001 through a round roller feeder or a wide belt feeder. When the distributing roller of the roller distributor 001 rotates, the sintering material is conveyed to the sintering pallet along with the relay force of the plurality of distributing rollers. The larger particles are rapidly conveyed and distributed to the lower part of the trolley, and the smaller particles fall into the middle upper part of the trolley through gaps between the distributing rollers, and further see fig. 1. Meanwhile, the segregation degree can be adjusted by adjusting the rotating speed of the cloth roller. Obviously, the faster the cloth roller rotates, the larger the granularity segregation of the mixture is; on the contrary, the material distributing roller rotates slowly, the granularity segregation of the mixture is small, and the inclination angle of the material distributing device is adjusted according to different raw material components and different productivity. The larger the angle is, the faster the cloth is, and the corresponding productivity is increased. The segregation of the granularity of the mixture, namely the segregation of the fuel in the vertical direction, is caused, and the content of the fuel is gradually reduced from bottom to top, so that the segregation degree of the mixture is controlled, the moderate segregation of solid carbon (namely coal dust) in the material layer is achieved, the upper temperature and the lower temperature of the sinter layer are regulated to be basically uniform, the vertical sintering speed and the sintering yield are improved, the energy consumption is reduced, and meanwhile, the basically uniform quality of the sinter is ensured.

The roller is an important component of the roller type distributor 001, and consists of a roller body, a roller neck and the like, wherein the roller body and the roller neck are welded into a whole after being inserted and matched in a hole shaft mode. The roll body part is directly washed and rubbed by the hard iron ore powder mixture in the running process, so that the outer surface of the roll body is continuously worn. In order to ensure that the roller body is wear-resistant and does not stick materials, the thickness of the wall of the roller body needs to be 15-20 mm; the roller body is made of stainless steel with high nickel-chromium content. The roller is high in manufacturing cost. And according to the requirements of the sintering process, when the gap between the two rollers exceeds more than 10mm, the rollers must be scrapped and replaced with new ones, so that the resource waste of rare precious metals nickel and chromium is caused.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

One of the objects of the invention is: the roller and the roller type distributing device comprising the roller are provided, and the problems that the roller in the prior art is high in manufacturing cost and resource waste is caused by frequent scrapping and replacement are solved.

In order to achieve the aim, the invention provides a roller which comprises a roller body and a roller neck which is arranged at the end part of the roller body and can drive the roller body to rotate, wherein the roller body comprises a roller sleeve and a roller core which is positioned in the roller sleeve.

Preferably, the roll core is tubular, and the shaft end of the roll neck is inserted into the roll core and fixed.

Preferably, a limit shaft shoulder is formed on the roll neck,

And/or the number of the groups of groups,

A limiting step is formed inside the roller core.

Preferably, when the limiting shaft shoulder is formed on the roll neck, the limiting shaft shoulder is opposite to the end parts of the roll core and the roll sleeve, and the outer surface of the joint of the roll neck and the roll sleeve is flush.

Preferably, a first set distance is kept between the limiting shaft shoulder and the end face of the roller core, a second set distance is kept between the limiting shaft shoulder and the end face of the roller sleeve, the first set distance is smaller than the second set distance, and the limiting shaft shoulder, the end face of the roller core and the end face of the roller sleeve are welded and fixed.

Preferably, a plurality of plug welding holes are formed in the roller sleeve, and the roller sleeve and the roller core are welded through the plug welding holes.

Preferably, the roller sleeve, the roller core and the roller neck are fixedly arranged in a detachable mode.

Preferably, the roller sleeve is made of stainless steel with high nickel-chromium content, and the roller core is made of ordinary carbon steel.

Preferably, the roll neck comprises a first roll neck positioned at the first end of the roll body and a second roll neck positioned at the second end of the roll body, the first roll neck comprises a first flange, and a mounting round hole or a mounting boss is formed on the flange surface of the first flange; the second roll neck comprises a second flange, and a mounting round hole or a mounting boss is formed on the flange surface of the second flange.

The invention also provides a roller type distributing device, which comprises a synchronizer/first bearing box and a second bearing box, wherein the roller is arranged between the synchronizer/first bearing box and the second bearing box;

When the roll neck comprises a first roll neck positioned at the first end of the roll body and a second roll neck positioned at the second end of the roll body, the first roll neck comprises a first flange, and a mounting round hole or a mounting boss is formed on the flange surface of the first flange; the second roll neck comprises a second flange, and when a mounting round hole or a mounting boss is formed on the flange surface of the second flange:

The synchronizer/first bearing housing includes a third flange that mates with the first flange, and the second bearing housing includes a fourth flange that mates with the second flange.

The technical scheme of the invention has the following advantages: the roller comprises a roller sleeve and a roller core, wherein the roller sleeve is required to meet the abrasion requirement, the roller core is not required, and the roller core only needs to be supported. Therefore, on the basis of meeting the strength and rigidity requirements of the roller body, the roller sleeve and the roller core are made of different materials, so that the manufacturing cost of the roller can be reduced, and the waste of scarce and precious resources when the roller is scrapped is avoided.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a prior art roller distributor;

FIG. 2 is a schematic cross-sectional view of a roll of an embodiment;

FIG. 3 is a schematic side view of a roller of an embodiment;

FIG. 4 is a schematic view of the positional relationship among the limit shoulder, the end face of the roll sleeve, and the end face of the roll core in the embodiment;

FIGS. 5 and 6 are schematic views of the first roll neck of the embodiment;

FIGS. 7 and 8 are schematic views of the structure of a second roll neck of the embodiment;

In the figure: 001. a roller distributor; 1. a first roll neck; 101. 201, shaft shoulders; 102. a first flange; 103. installing a round hole; 104. 204, bolt holes; 2. a second roll neck; 202. a mounting boss; 3. a roll core; 4. a roller sleeve; 401. plug welding holes; 5. and (5) annular welding seams.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In this embodiment, a roll of a roll type distributor is used as an example. Without loss of generality, the roller of the embodiment can be suitable for roller distributors and other similar occasions.

Referring to fig. 2 and 3, the roll of the embodiment includes a roll body and a roll neck. Wherein, the roll neck sets up the tip at the roll body and can drive the roll body rotation. The roll body comprises a roll sleeve 4 and a roll core 3 positioned in the roll sleeve 4.

The roller of this embodiment, its roll body includes roller shell 4 and roller core 3, and wherein roller shell 4 needs to satisfy the wearing and tearing demand and roller core 3 need not, and roller core 3 only need satisfy the support requirement can. Therefore, on the basis of meeting the requirements of the strength and the rigidity of the roller body, the roller sleeve 4 and the roller core 3 are made of different materials, so that the manufacturing cost of the roller can be reduced, and the waste of scarce and valuable resources when the roller is scrapped is avoided.

In general, the roll cover 4 needs to be non-stick in addition to wear-resistant, so it is preferable, but not necessary, to use stainless steel for the roll cover 4, which has a higher nickel-chromium content. In the roll core 3, the roll core 3 is generally only required to bear bending moment and torque, so that the roll core 3 is made of ordinary carbon steel. In addition, the roller sleeve 4 is designed with the thickness of the tube wall slightly larger than the roller gap required by the actual working condition, so that the wear-resisting requirement required in use can be met, the manufacturing cost can be reduced, and the rare precious metal nickel-chromium resource can be saved.

Obviously, in this case, compared with the integral roller body which adopts stainless steel with higher nickel-chromium content, the manufacturing cost of the roller body of the embodiment is greatly reduced.

Of course, the materials of the roller sleeve 4 and the roller core 3 of the roller body of the embodiment are not limited by the embodiment. Any material of the roll sleeve 4 and the roll core 3 should be included in the protection scope of the present application, as long as the roll sleeve 4 can meet the wear-resistant requirement and the roll core 3 can meet the supporting requirement.

In addition, the roll core 3 and the roll sleeve 4 in this embodiment may be made of standard seamless steel pipes, or may be made of sheet materials, which are rolled and then welded, or cast.

In this embodiment, it is preferable but not necessary that the roll core 3 has a tubular shape, and the shaft end of the roll neck is inserted into the roll core 3 and fixed. Obviously, the structure of the roll neck and the roll body and the connection form between the roll neck and the roll body are not limited, and only the roll neck can drive the roll body to rotate. For example, instead of inserting the roll neck into the roll core 3, the roll neck may also be specifically designed such that the roll body as a whole can be inserted into the roll neck.

Referring to fig. 2, in order to facilitate the installation between the roll neck and the roll core 3, limit shoulders 101, 201 (refer to fig. 5 and 7) may be provided on the roll neck, and the installation positions between the roll neck and the roll core 3 may be defined by the limit shoulders 101, 201, so that the positions of the roll neck and the roll core 3 in the length direction of the roll are relatively determined. Of course, in addition to the limiting shoulders 101, 201 provided on the roll neck, a limiting step (the limiting step is shown but not labeled in fig. 2) may be provided inside the roll core 3. Or the limiting shoulders 101 and 201 can be arranged on the roll neck at the same time, and the limiting steps are arranged inside the roll core 3.

In fig. 2, limit shoulders 101, 201 are formed on the roll neck, and limit steps are formed inside the roll core 3 at the same time. In this case, when the shaft end of the roll neck is inserted into the roll core 3, the end face of the shaft end abuts against the limit step, thereby preventing the roll neck from moving toward the roll body. In addition, the end face of the roll body abuts against the limit shoulders 101, 201 (in the drawing, the end face of the roll body indirectly abuts against the limit shoulders 101, 201 through a welding filler). Thus, the limiting shoulders 101 and 201 and the limiting steps form double limiting, and the mounting position between the roll neck and the roll core 3 is ensured.

Further, when the limit shoulders 101, 201 are formed on the roll neck, the limit shoulders 101, 201 are opposite to the ends of the roll core 3 and the roll sleeve 4, and preferably make the outer surface of the junction of the roll neck and the roll sleeve 4 flush. In this case, the connection between the roll neck and the roll body can also participate in the material distribution process. Of course, the outer surface of the junction of the roll neck and the roll sleeve 4 may also be non-flush.

Referring to fig. 4, a first set distance is maintained between the limiting shoulders 101 and 201 and the end surface of the roller core 3, and a second set distance is maintained between the limiting shoulders 101 and 201 and the end surface of the roller sleeve 4. Preferably, but not necessarily, the first set distance is less than the second set distance so that the roll core 3 is at least partially exposed outside the roll mantle 4. On this basis, the limiting shaft shoulders 101 and 201, the end face of the roller core 3 and the end face of the roller sleeve 4 are welded and fixed, and further referring to fig. 2, two annular welding seams 5 formed between the limiting shaft shoulders 101 and 201, the end face of the roller core 3 and the end face of the roller sleeve 4 are obtained.

In order to further ensure the reliability of the installation between the roller core 3 and the roller sleeve 4, a plurality of plug welding holes 401 are further arranged on the roller sleeve 4, and the roller sleeve 4 and the roller core 3 are welded through the plug welding holes 401.

Of course, when the roll neck, the roll core 3 and the roll sleeve 4 are fixed by welding, the specific form of welding is not limited by the drawings.

It should be noted that, in this embodiment, the roll neck, the roll core 3 and the roll sleeve 4 may be fixed in a detachable manner, besides being fixed in a welding manner. And when adopting detachable mode fixed roll neck, roller core 3 and roller shell 4, once roller shell 4 is worn out when needing to change, can change roller shell 4 alone to further reduce the maintenance cost of roller. Furthermore, the roll core 3 and the roll neck can also be replaced separately.

For example, a concave-convex mosaic structure may be provided between the roll shell 4 and the roll core 3, so that the roll shell 4 and the roll core 3 are detachable. And in the same way, a concave-convex mosaic structure is also arranged between the roller core 3 and the roller neck. When the roll neck rotates, the roll core 3 is driven to rotate, and the roll sleeve 4 is driven to rotate. When the roll sleeve 4 needs to be replaced, the roll sleeve 4 can be replaced independently, and the roll core 3 and the roll neck can be reused.

For another example, a countersunk threaded hole may be formed in the roll sleeve 4, and threaded holes may be formed in the roll core 3 and the roll neck, so that a screw or bolt sequentially passes through the countersunk threaded hole in the roll sleeve 4, the threaded hole in the roll core 3, and the threaded hole in the roll neck, so as to realize synchronous rotation of the roll neck and the roll body. In this case, since the countersunk threaded holes are formed in the roll sleeve 4, the heads of the screws or bolts are flush with the outer surface of the roll body, so that the cloth is not affected.

For another example, the roll neck, roll core 3 and roll shell 4 may also be pinned, and so forth.

The detachable connection mode among the roll neck, the roll core 3 and the roll sleeve 4 does not limit the protection scope of the application.

It should be noted that the overlay welding may be directly performed on the roll core 3 to obtain the wear-resistant roll sleeve 4.

Further, the roll neck of the embodiment comprises a first roll neck 1 positioned at the first end of the roll body and a second roll neck 2 positioned at the second end of the roll body, wherein the first roll neck 1 comprises a first flange 102, and a mounting round hole or a mounting boss is formed on the flange surface of the first flange 102; the second roll neck 2 comprises a second flange, and a mounting round hole or a mounting boss is formed on the flange surface of the second flange.

As can be seen in fig. 5 and 6, the first flange 102 of the first roll neck 1 is provided with mounting holes 103. Thus, a third flange on the synchronizer or the first bearing housing, which cooperates with the first flange 102, is provided with a mounting boss matching the mounting hole 103.

As can be seen in fig. 7 and 8, the second flange of the second roll neck 2 is provided with a mounting boss 202. Thus, a fourth flange on the second bearing housing, which mates with the second flange, is provided with a mounting circular hole that mates with the mounting boss 202.

Through the mounting round holes 103 or the mounting bosses 202 arranged on the first flange 102 and the second flange, the shearing force of the connecting bolts on the first flange 102 and the second flange can be reduced, the service life of the connecting bolts is prolonged, and the reliability of roller installation is ensured.

In fig. 5 and 7, the first flange 102 and the second flange are both end flanges, which, of course, do not limit the structure of the first roll neck 1 and the second roll neck 2, and the first flange 102 and the second flange may be disposed at other positions of the roll neck.

By arranging the flange on the roll neck, when one roll is required to be replaced, other irrelevant parts are not required to be disassembled, and only the connecting bolts are required to be loosened, the roll is forced to move towards the direction of the second bearing box by a set distance, for example, a distance of more than 10mm, so that the roll can be conveniently disassembled. In turn, new rollers can be easily installed. Thus, the labor intensity of maintenance is reduced, the maintenance time is saved, and the improvement of the operation efficiency of the sintering machine is facilitated.

Of course, instead of providing the mounting circular holes 103 and the mounting bosses 202 on the above first flange 102 and second flange, a key groove or a protrusion may be provided on the first flange 102 or second flange.

The embodiment also provides a roller type distributing device, which comprises a synchronizer, wherein the synchronizer is connected with a first bearing box, the first bearing box is connected with the first end of the roller, and the second end of the roller is connected with a second bearing box. Thus, the roller is mounted between the first bearing housing and the second bearing housing. Of course, the synchronizer may be directly connected to the roller not through the first bearing housing, so that the roller is installed between the synchronizer and the second bearing housing.

Further, when the roll neck comprises a first roll neck 1 positioned at the first end of the roll body and a second roll neck 2 positioned at the second end of the roll body, the first roll neck 1 comprises a first flange 102, and a mounting round hole or a mounting boss is formed on the flange surface of the first flange 102; the second roll neck 2 comprises a second flange, and when a mounting round hole or a mounting boss is formed on the flange surface of the second flange:

the synchronizer/first bearing housing includes a third flange that mates with the first flange 102, and the second bearing housing includes a fourth flange that mates with the second flange.

It is obvious that, in order to make the third flange fit with the first flange 102, when the first flange 102 is provided with the mounting circular hole 103, the third flange is provided with a mounting boss that fits with the mounting circular hole 103. And similarly, a mounting round hole is formed in the fourth flange.

On the basis of the above, the embodiment also provides a method for processing the roller, which comprises the following steps:

Preparing materials:

Taking the design outer diameter d of the roller as a reference, selecting a stainless steel seamless tube with the outer diameter of 2 mm-4 mm larger than the design outer diameter d as the outer diameter of the roller sleeve 4, wherein the inner diameter of the roller sleeve 4 is 10 mm-12 mm smaller than the design outer diameter d; the roll body is made of a plain carbon steel seamless steel tube, the outer diameter of the roll core is 2-4 mm larger than the inner diameter of the roll sleeve 4, and the inner diameter of the roll core is 20 mm-26 mm smaller than the inner diameter of the roll sleeve 4. The roll neck is made of common carbon steel round steel with the diameter of 2 mm-4 mm larger than the designed outer diameter d.

And (II) blanking:

The distance between the first flange 102 and the second flange at both ends of the roll is used as a reference. The length of the roller core 3 is generally designed to be 80 mm-100 mm larger than the effective width of the matched sintering trolley, the length of the roller sleeve 4 is 10mm shorter than that of the roller core 3, the length of the roller neck is generally designed to be about 200mm, and the length of the roller neck inserted into the inner shaft end of the roller core 3 is about 60 mm.

(III) machining the roller core 3:

The roll core 3 belongs to a slender hollow shaft, has poor rigidity and needs to penetrate into the inner cavity of the roll sleeve 4. The outer circle of the roller core 3 is machined by turning, and the outer diameter of the outer circle is about 0.8 mm-1.2 mm smaller than the inner diameter of the roller sleeve 4. In the embodiment, the outer diameter of the roller core 3 is selected to be smaller than the inner diameter of the roller sleeve 4 by 1mm, so that the single side of a fit clearance between the roller core 3 and the roller sleeve 4 is 0.5mm, the fit rigidity of the roller core 3 and the roller sleeve 4 can be ensured under the condition, and the difficulty of pipe penetrating in the process of installing the roller core 3 in the roller sleeve 4 can be reduced.

Because the roller core 3 belongs to turning of an elongated rod, the roller core 3 is easy to bend and even unstably under the actions of cutting force, gravity, thermal deformation and tip pretightening force, and therefore, a reasonable machining process is required to be selected to improve the stress problem. Therefore, when the excircle of the roll core 3 is turned, 1-2 lathe center frames can be selectively arranged in the middle of the roll core 3 according to the length of the roll core 3, a lathe follower rest is arranged, an elastic tailstock center is adopted, and a clamping mode of clamping one end by one end is adopted.

Meanwhile, in the turning engineering, a reasonable cutter angle is selected. For example, a cutter with a rake angle of 13 ° to 17 °, a main deflection angle of 60 ° to 75 °, and a blade inclination angle of 0 ° to 10 ° may be selected, and the cutting amount may be controlled, including taking smaller cutting depth, feed amount, and cutting speed.

In addition, measures such as spraying cooling liquid to the machining part in the cutting process can be taken to prevent the machining part from being deformed by heating. And when the outer surface of the roller core 3 is machined, turning inner holes matched with the roller necks at the two ends of the roller core 3, and chamfering the outer sides of the two ends of the roller core 3 by 8x35 degrees to serve as a welding groove.

And (IV) machining the roller sleeve 4:

The outer sides of two ends of the pair roller sleeve 4 are chamfered by 8x45 degrees to be used as welding grooves. Because a gap of about 0.5mm exists between the roller sleeve 4 and the roller core 3, in order to ensure the overall rigidity of the roller, plug welding holes 401 are formed in the length direction of the roller sleeve 4 at intervals of about 800mm, so that four plug welding holes 401 with the diameters of 10 mm-15 mm formed on the roller sleeve 4 are obtained, and the plug welding holes 401 of each group are arranged in a spiral staggered mode.

And (V) roll neck machining:

The first roll neck 1 and the second roll neck 2 are roughly turned, and other parts are turned in place according to the figure except the first flange 102, the second flange, the mounting round hole 103 on the first flange 102, the mounting boss 202 on the second flange, the bolt holes 104 on the first flange 102 and the bolt holes 204 on the second flange, and then the whole is subjected to heat treatment and tempering.

And (six) roller assembly welding:

Firstly, penetrating the roller core 3 into the inner cavity of the roller sleeve 4, and then inserting the shaft ends of the first roller neck 1 and the second roller neck 2 into the inner cavities at two ends of the roller core 3, wherein the two end surfaces of the roller core 3 are respectively kept at a distance of 2mm from the position of the limiting shaft shoulders 101 and 201, and the two end surfaces of the roller sleeve 4 are respectively kept at a distance of 5mm from the position of the limiting shaft shoulders 101 and 201. The roll core 3, the roll sleeve 4 and the roll neck are welded by adopting gas shielded welding, A102 or A107 welding wires are selected, the positions of the welding wires are adjusted on a welding platform, the welding wires are fixed by spot welding, and then the annular welding seam 5 among the roll core 3, the roll sleeve 4 and the roll neck is continuously fully welded. And then fully welding all plug welding holes 401 pre-drilled on the roller sleeve 4, so as to strengthen the connection rigidity of the roller core 3 and the roller sleeve 4. The roller sleeve 4 is provided with a plurality of groups of plug welding holes 401, so that the connection rigidity between the roller sleeve 4 and the roller core 3 can be effectively increased, and the adverse effect of the fit clearance between the roller sleeve 4 and the roller core 3 is eliminated.

After the assembly welding is finished, carrying out vibration aging or artificial aging treatment on the roller so as to eliminate welding stress; and finishing, wherein the overall cylindricity and the surface roughness of the roll body are ensured to meet the requirements, and the concentricity between the roll body and the center of the roll neck is ensured.

And (seventh) roller machining:

The outer circle of the roller is machined by turning, and the roller is easy to bend and even unstably under the actions of cutting force, gravity, thermal deformation and tip pretightening force because the roller still belongs to turning of an elongated rod piece. Therefore, when the roller is turned to be round, 1-2 lathe center frames are arranged in the middle of the roller according to different lengths, and a lathe follower rest is arranged, so that an elastic tailstock center is adopted. Meanwhile, in the turning engineering, a clamping mode of clamping one by one is adopted.

And selecting a reasonable cutter angle. For example, a cutter with a rake angle of 13 DEG to 17 DEG, a main deflection angle of 60 DEG to 75 DEG, and a blade inclination angle of 0 DEG to 10 DEG can be selected, and the cutting amount can be controlled, including a smaller cutting depth, feed amount and cutting speed.

The cooling liquid can be sprayed on the processing part in the cutting process to prevent thermal deformation. After the outer circle of the roller is machined, the flange surfaces at the two ends of the roller, the bolt holes 104 on the first flange 102, the bolt holes 204 on the second flange, the mounting round holes 103 on the first flange 102 and the mounting bosses 202 on the second flange are machined.

In the method, when the roll core 3 and the roller are turned to be round, the follower rest and the center rest are adopted, which is equivalent to adding a support on the workpiece, so that the rigidity of the workpiece is increased, and the influence of radial cutting force on the slender shaft can be effectively reduced. And when turning the roller core 3 and the outer circle of the roller, a clamping mode of clamping one by one is adopted, and the center of the roller adopts an elastic tailstock center, so that the slender shaft can be freely stretched after being heated, and the heated bending deformation of the slender shaft is reduced. In addition, when turning the roller core 3 and the outer circle of the roller, reasonable cutting amount is adopted, so that the radial cutting force of the workpiece is reduced, and meanwhile, the cutting heat is reduced. In addition, when the roller core 3 and the roller outer circle are turned, a reasonable cutter angle is adopted, so that the radial cutting force of a workpiece can be greatly reduced. Finally, when the roller core 3 and the roller are turned, the cooling liquid is sprayed to the processing part in the cutting process, so that most of cutting heat can be rapidly taken away, and the heat accumulation and the thermal deformation of a workpiece are reduced.

The above embodiments are only for illustrating the present invention, and are not limiting of the present invention. While the invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, and substitutions can be made thereto without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The roller comprises a roller body and a roller neck which is arranged at the end part of the roller body and can drive the roller body to rotate, and is characterized in that the roller body comprises a roller sleeve and a roller core which is positioned in the roller sleeve; the roll core is tubular, and the shaft end of the roll neck is inserted into the roll core and fixed; a limiting shaft shoulder is formed on the roll neck, and a limiting step is formed inside the roll core; the limiting shaft shoulder is opposite to the end parts of the roller core and the roller sleeve, and the outer surface of the joint of the roller neck and the roller sleeve is in an uneven state, wherein a first set distance is kept between the limiting shaft shoulder and the end surface of the roller core, a second set distance is kept between the limiting shaft shoulder and the end surface of the roller sleeve, the first set distance is smaller than the second set distance, the limiting shaft shoulder, the end surface of the roller core and the end surface of the roller sleeve are welded and fixed, and the end surface of the roller body is indirectly abutted against the limiting shaft shoulder through welding filler; the roller sleeve is made of stainless steel with high nickel-chromium content, and the roller core is made of ordinary carbon steel.

2. The roll of claim 1 wherein said sleeve is provided with plug welding holes, said sleeve and said core being welded through said plug welding holes.

3. A roll according to claim 1 or 2, wherein the roll neck comprises a first roll neck at a first end of the roll body and a second roll neck at a second end of the roll body, the first roll neck comprising a first flange having a mounting hole or mounting boss formed in a flange face thereof; the second roll neck comprises a second flange, and a mounting round hole or a mounting boss is formed on the flange surface of the second flange.

4. A roller distributor comprising a synchronizer/first bearing housing and a second bearing housing, wherein the roller of any one of claims 1 to 3 is mounted between the synchronizer/first bearing housing and the second bearing housing;