CN213968309U

CN213968309U - Pipe rolling device

Info

Publication number: CN213968309U
Application number: CN202022808712.XU
Authority: CN
Inventors: 张文华; 窦建民; 李国荣; 王建瑞
Original assignee: Shijiazhuang Kaifu Roller Co ltd
Current assignee: Shijiazhuang Kaifu Roller Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-08-17
Anticipated expiration: 2030-11-27

Abstract

The utility model provides a tubular product roll device belongs to the steel pipe and makes technical field, including the top roll, first bottom roll and second bottom roll, decompose the bottom roll into interconnect's first bottom roll and second bottom roll, first bottom roll drives stock or steel pipe removal, stock or steel pipe drive the second bottom roll once more rotatory, are equipped with the cell body structure on the first bottom roll, and stock or steel pipe are placed in the cell body structure and can be rolled, are equipped with the space between second bottom roll and the first bottom roll, and the linear velocity on the structural linear velocity of cell body and the second bottom roll is the same. The utility model provides a pair of tubular product roll device has the lower roll to having the cell body and is the same at rotatory in-process cell body inboard and outside linear velocity, and does not influence the technological effect of stock or steel pipe rolling precision and quality.

Description

Pipe rolling device

Technical Field

The utility model belongs to the technical field of the steel pipe is made, more specifically say, relate to a tubular product roll device.

Background

In the prior art, most steel pipe manufacturers use rollers of different specifications on a rolling mill to roll and form steel pipes according to the steel pipes of different specifications when producing the steel pipes, and various types of roller assemblies (namely working rollers) are required in the process of rolling and forming the steel pipes, wherein each roller assembly comprises a pair of rollers, each pair of rollers comprises an upper roller and a lower roller, the rollers are used for feeding materials to the roller assemblies (namely the working rollers) through feeding rollers, and the steel pipes are rolled and formed through the mutual acting force or extrusion force generated between the upper rollers and the lower rollers.

According to different rolling forming degrees of the rollers, the outer diameters of the upper roller and the lower roller can be set to be different, or the lower roller is designed into a grooved roller structure with grooves, a blank or a steel pipe to be rolled is placed on the lower roller, and the blank or the steel pipe is rolled and formed through extrusion rolling of the upper roller. Since the lower roller is arranged in a grooved roller structure with a groove body, the distance between the bottom of the groove body and the rotating shaft of the lower roller is defined to be L1, the distance between the top or the outer edge of the groove body and the lower roller is defined to be L2, and L1 is smaller than L2. When placing stock or steel pipe on the lower roll to when rolling through the top roll, because L1 is less than L2, lower roll formula component as an organic whole, stock or steel pipe are in the cell body, along with the rotation of lower roll, then the linear velocity at cell body top is different with the linear velocity at cell body bottom, and for stock or steel pipe, the linear velocity that acts on stock or steel pipe is different, can lead to deformation or aversion in rolling process, influences the rolling precision of stock or steel pipe.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tubular product roll device aims at solving the lower roll that has the cell body and is influencing the technical problem of stock or the rolling precision of steel pipe at rotatory in-process cell body inboard and outside linear velocity difference.

In order to achieve the above object, the utility model adopts the following technical scheme: providing a pipe rolling device, which comprises an upper roller, a first lower roller and a second lower roller, wherein the upper roller can rotate to roll a blank or a steel pipe and is controlled by a rolling mill; the first lower roller is positioned below the upper roller and is axially arranged in parallel with the upper roller, a groove body structure is arranged on the first lower roller, and a blank or a steel pipe is arranged in the groove body structure and can be rolled by the upper roller; the two second lower rollers are respectively arranged on the side parts of the two ends of the first lower roller, the outer side surface of the second lower roller close to the groove body structure is flush with the outward extending surface of the inner side surface of the groove body structure, blanks or steel pipes are arranged in the groove body structure and on the side surface of the second lower roller and can be rolled, a gap is formed between the second lower roller and the first lower roller, the first lower roller drives the blanks or the steel pipes to move, the blanks or the steel pipes move to drive the second lower roller to rotate, and the linear speed on the groove body structure is the same as the linear speed on the second lower roller.

As another embodiment of the present application, the first lower roll includes two working rolls, the two working rolls are symmetrically disposed with a radial plane perpendicular to a rotation axis of the first lower roll as a symmetry line, and a seam line formed at a joint between the two working rolls coincides with a center line of the upper roll, and the two working rolls are used for extruding and rolling the blank or the steel pipe in cooperation with the upper roll.

As another embodiment of the application, the outer side edges of the two working rolls along the axial direction are in a folded line shape, and the outer side edges of the two working rolls are combined to form the groove body structure.

As another embodiment of the present application, a plurality of oil grooves are formed in the gap on the outer side edge of the first lower roller, lubricating oil is provided in the oil grooves, and the second lower roller is connected with the first lower roller through sliding friction of the lubricating oil.

As another embodiment of the application, the second lower roller comprises a bearing sleeve, a bearing and a roller body, wherein the bearing sleeve is sleeved and limited on a rotating shaft of the first lower roller; the bearing is sleeved on the outer circumference of the bearing sleeve and can rotate around the circumferential direction of the bearing sleeve; the roller body is sleeved on the outer circumference of the bearing and can rotate around the circumference of the bearing, the rotation of the roller body is controlled by the movement of ingredients or steel pipes, and a gap is arranged between the roller body and the first lower roller.

As another embodiment of the present application, an oil injection hole adapted to inject oil into the oil groove is provided on the second lower roll.

As another embodiment of the present application, bearing end caps are respectively disposed on the side surfaces of the two ends of the second lower roll, the bearing end caps are fixedly disposed on the side walls of the roll body and used for sealing and blocking the axial movement of the bearings, a through hole is disposed in the middle of each bearing end cap, and the rotating shaft of the first lower roll is located in the through hole and connected with the inner wall of the through hole in a sliding and sealing manner.

As another embodiment of the application, the bending part of the zigzag structure on the working roll is in arc transition.

As another embodiment of the application, the outer port of the oil filling hole is provided with an end plug for preventing lubricating oil from leaking outwards.

As another embodiment of the application, the section of the upper roller is rectangular, and the section of the groove body structure is trapezoidal.

The utility model provides a pair of tubular product roll device's beneficial effect lies in: compared with the prior art, the utility model relates to a tubular product roll device, decompose the bottom roll into first bottom roll and second bottom roll of interconnect, first bottom roll drives stock or steel pipe and removes, stock or steel pipe drive the rotation of second bottom roll once more, the second bottom roll is equivalent to a follower, can understand that become the follower by the driving part among the prior art, then act on the follower linear velocity and can reduce correspondingly in the rolling process, the linear velocity that acts on the cell body structure after first bottom roll rotates can be the same with the linear velocity on the second bottom roll, relative to adopting the integral type structure, the linear velocity difference that produces in the bottom roll outside and inboard, the utility model discloses do not produce or produce very few linear velocity difference, to the work piece that is rolled, avoided influencing rolling precision or quality, solved the bottom roll that has the cell body and in the rotation process the different technical problem that influences stock or steel pipe rolling precision of the different linear velocity in the cell body, the rolling device has the technical effects that the linear speeds of the inner side and the outer side of the groove body are the same in the rotating process of the lower roller with the groove body, and the rolling precision and the rolling quality of blanks or steel pipes are not influenced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a pipe rolling device according to an embodiment of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

fig. 3 is an enlarged view of the structure at B in fig. 1.

In the figure: 1. an upper roller; 2. a first lower roll; 21. a work roll; 3. a second lower roll; 31. a bearing housing; 32. a bearing; 33. a roll body; 34. a bearing end cap; 35. oil sealing; 4. a tank structure; 5. an oil sump; 6. blanks or steel tubes.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to fig. 2, a pipe rolling device according to the present invention will be described. The pipe rolling device comprises an upper roller 1, a first lower roller 2 and a second lower roller 3, wherein the upper roller 1 can rotate to roll a blank or a steel pipe 6 and is controlled by a rolling mill; the first lower roller 2 is positioned below the upper roller 1 and is axially arranged in parallel with the upper roller 1, the first lower roller 2 is provided with a groove body structure 4, and a blank or a steel pipe 6 is arranged in the groove body structure 4 and can be rolled by the upper roller 1; the second lower roll 3 is two and locates the both ends lateral part of first lower roll 2 respectively, the lateral surface that is close to cell body structure 4 on the second lower roll 3 is parallel and level with the outside extension face of cell body structure 4 medial surface, blank or steel pipe 6 are all arranged in cell body structure 4 and on the side of second lower roll 3 and can be rolled, be equipped with the space between second lower roll 3 and the first lower roll 2, first lower roll 2 drives blank or steel pipe 6 and removes, blank or steel pipe 6 remove can drive the rotation of second lower roll 3, the linear velocity on the cell body structure 4 is the same with the linear velocity on the second lower roll 3.

Compared with the prior art, the utility model provides a pipe roll device, the utility model discloses a pipe roll device, decompose the bottom roll into first bottom roll 2 and second bottom roll 3 of interconnect, first bottom roll 2 drives stock or steel pipe 6 and removes, stock or steel pipe 6 drive second bottom roll 3 rotatory once more, second bottom roll 3 is equivalent to a follower, can understand that become the follower by the driving part among the prior art, then act on the follower on-line speed can corresponding reduction in the rolling process, the linear velocity that acts on cell body structure 4 after first bottom roll 2 rotates can be the same with the linear velocity on second bottom roll 3, relative to adopting integral type structure, the linear velocity difference that produces in the bottom roll outside and inboard, the utility model discloses do not produce or produce the linear velocity difference very little, to the work piece of being rolled, avoided influencing rolling precision or quality, the technical problem that the rolling precision of the blank or the steel pipe 6 is affected by the fact that the linear speeds of the inner side and the outer side of the groove body of the lower roller with the groove body are different in the rotating process is solved, and the technical effects that the linear speeds of the inner side and the outer side of the groove body of the lower roller with the groove body are the same in the rotating process and the rolling precision and the rolling quality of the blank or the steel pipe 6 are not affected are achieved.

The utility model discloses be exactly with the lower roll components of a whole that can function independently among the prior art become first lower roll 2 and second lower roll 3, be equivalent to and decompose into a driving part, a follower, the driving part drives work piece (stock or steel pipe 6) and removes, then the work piece drives the follower once more rotatory, be equivalent to the linear velocity of the linear velocity as the driving part among the prior art on the follower and reduce or reduced, the best condition that can reach is, the linear velocity on the cell body structure 4 equals with the linear velocity on the second lower roll 3. The workpiece should not be subjected to the rolling process due to the linear velocity difference formed in the groove structure 4, which affects the rolling accuracy or quality of the workpiece.

When the roller in the prior art adopts a planar structure (that is, the outer surface of the roller is planar), the linear velocity difference between the upper roller 1 and the lower roller cannot occur in the rolling process, so that the linear velocities acting on the lower roller are the same. Under the special circumstances, especially the utility model discloses a roll with cell body structure 4 just produces the linear velocity difference that acts on the inboard and outside of cell body structure 4 easily, can influence rolling precision or the shaping quality to the work piece in rolling process.

The utility model discloses can be applicable to the rolling to the steel pipe, also can be applicable to the rolling of belted steel and other steel, it is the pipe rolling device specifically to write clearly in the name, and do not confine to the rolling to tubular product, also can not regard as the name to restrict in the utility model discloses a protection scope.

As a specific implementation manner of the pipe roll device, please refer to fig. 1 to 3, the first bottom roll 2 includes two working rolls 21, the two working rolls 21 are all symmetrically disposed with respect to the radial plane perpendicular to the rotation axis of the first bottom roll 2, and the seam line formed at the joint between the two working rolls 21 coincides with the center line of the top roll 1, and the two working rolls 21 are used for extruding the rolling blank or the steel pipe 6 in cooperation with the top roll 1. The groove structure 4 is provided on the outer circumference of the two work rolls 21, and is groove-shaped in the axial direction. The upper roller 1 and the first lower roller 2 are both positioned on the same vertical line and are both aligned in the middle.

The two working rolls 21 can be understood as a pair of rolls, symmetrically arranged and rotating simultaneously, which has the advantages of easy manufacture and installation, convenient roll operation and matching with the working rolls 21 of different forms for rolling. When the width of the groove body structure 4 needs to be adjusted, a cylindrical flat roller can be added between the two working rollers 21, and the width of the groove body structure 4 is widened, so that the groove body structure is suitable for rolling blanks or steel pipes 6 with different specifications or forms.

As a specific embodiment of the pipe roll device provided in the present invention, please refer to fig. 1 to 3, the two working rolls 21 are folded along the axial outer side, and the outer sides of the two working rolls 21 are combined to form the groove structure 4. The tank structure 4 is a wide-mouthed tank type.

As a specific embodiment of a tubular product roll device, please refer to fig. 1 to 3, the outside edge of the first bottom roll 2 is equipped with a plurality of oil grooves 5 on the position of the gap, lubricating oil is provided in the oil grooves 5, and the second bottom roll 3 is connected with the first bottom roll 2 through sliding friction of lubricating oil.

Oil groove 5 is rectangular shape cell body, and the cross-section can be for circular or for rectangle or square etc. through injecting lubricating oil or lubricating oil into oil groove 5 in, then sliding friction between first bottom roll 2 and the second bottom roll 3 is more smooth, can prevent effectively that first bottom roll 2 from driving second bottom roll 3 rotatory simultaneously at rotatory in-process, and the purpose makes and produces the linear velocity difference between first bottom roll 2 and the second bottom roll 3. The lubricating oil is preferably grease, so that the liquid lubricating oil is prevented from leaking outwards from the gap and affecting the lubricating effect.

As a specific embodiment of the pipe roll device provided by the present invention, please refer to fig. 1 to 3, the second lower roll 3 includes a bearing housing 31, a bearing 32 and a roll body 33, the bearing housing 31 is sleeved and limited on the rotating shaft of the first lower roll 2; the bearing sleeve 31 is connected on the outer circumference of the bearing sleeve 31 and can rotate around the circumference of the bearing sleeve 31; the roller body 33 is sleeved on the outer circumference of the bearing 32 and can rotate around the circumference of the bearing 32, the rotation of the roller body 33 is controlled by the movement of the ingredients or the steel pipe, and a gap is arranged between the roller body 33 and the first lower roller 2. The bearing 32 is provided to prevent the bearing housing 31 from bringing a linear velocity difference (linear velocity difference between the bearing housing and the groove body structure 4) to the roller body 33 because the roller body 33 and the bearing housing 31 are connected by the bearing 32 and the rotation of the roller body 33 does not drive the rotation of the bearing housing 31 when the first lower roller 2 drives the blank or the steel pipe 6 to move, and therefore the rotation of the roller body 33 is only caused by the movement of the blank or the steel pipe 6.

As a specific embodiment of the pipe roll device provided in the present invention, please refer to fig. 1 to 3, an oil hole (the oil hole is not shown in the figure) suitable for injecting oil into the oil groove 5 is provided on the second lower roll 3. When the amount of the lubricating oil in the oil groove 5 is small or after the oil groove is used for a period of time, the lubricating oil can be added into the oil groove 5 through the oil filling hole, and the oil filling operation is convenient.

As a specific implementation manner of the utility model provides a pair of tubular product roll device, please refer to fig. 1 to 3, all be equipped with bearing end cover 34 on the both ends side of second bottom roll 3, bearing end cover 34 sets firmly on roll body 33 lateral wall and is used for the closing cap to block bearing 32 axial displacement, and bearing end cover 34 middle part is equipped with the through-hole, and first bottom roll 2's pivot is located the through-hole and is connected with through-hole inner wall sliding seal. The arrangement of the bearing end cover 34 can prevent the bearing 32 from generating axial movement on the bearing sleeve 31 to influence the roller operation, and after the bearing end cover 34 is arranged, the bearing 32 does not generate axial movement on the bearing sleeve 31, and the roller body 33 does not generate axial movement. The bearing end cover 34 is tightly connected with the roller body 33 through screws or screws.

Specifically, an oil seal 35 is provided on the inner circumference of the bearing housing 31 to prevent the lubricating oil on the bearing 32 from leaking to the first lower roll 2.

As a specific implementation manner of the present invention, please refer to fig. 1 to 3, the bending portion of the working roll 21 having a zigzag structure is a circular arc transition, and for preventing stress concentration, the circular arc transition is arranged, so as to prevent the workpiece from stress concentration during the rolling process, which affects the rolling quality of the workpiece.

As a specific embodiment of the pipe roll device provided in the present invention, please refer to fig. 1 to 3, the outer port of the oil injection hole is provided with an end plug for preventing the leakage of the lubricating oil. The end plug can be made of plastic, the end plug is opened when oil is required to be filled, and the end plug is closed when the oil is not required to be filled.

As a specific embodiment of the pipe roll device provided in the present invention, please refer to fig. 1 to 3, the cross section of the upper roll 1 is rectangular, the cross section of the groove structure 4 is trapezoidal, and the above-mentioned cross section is the cross section along the vertical direction.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A tubing rolling device, comprising:

an upper roller which can rotate and roll the blank or the steel pipe and is controlled by a rolling mill;

the first lower roller is positioned below the upper roller and is axially arranged in parallel with the upper roller, a groove body structure is arranged on the first lower roller, and a blank or a steel pipe is arranged in the groove body structure and can be rolled by the upper roller; and

the two second lower rollers are respectively arranged on the side parts of the two ends of the first lower roller, the outer side surface of the second lower roller close to the groove body structure is flush with the outward extending surface of the inner side surface of the groove body structure, blanks or steel pipes are arranged in the groove body structure and on the side surface of the second lower roller and can be rolled, a gap is formed between the second lower roller and the first lower roller, the first lower roller drives the blanks or the steel pipes to move, the blanks or the steel pipes move to drive the second lower roller to rotate, and the linear speed on the groove body structure is the same as the linear speed on the second lower roller.

2. The pipe rolling device according to claim 1, wherein the first lower roll comprises two working rolls, the two working rolls are symmetrically arranged by taking a radial plane perpendicular to a rotating shaft of the first lower roll as a symmetry line, a seam line formed at a joint between the two working rolls coincides with a center line of the upper roll, and the two working rolls are used for extruding and rolling the blank or the steel pipe in cooperation with the upper roll.

3. The pipe rolling device according to claim 2, wherein the outer side edges of the two work rolls in the axial direction are both in a zigzag shape, and the outer side edges of the two work rolls are combined to form the groove structure.

4. The pipe rolling device according to claim 1, wherein a plurality of oil grooves are formed in the outer side edges of the first lower roll and at the gaps, lubricating oil is provided in the oil grooves, and the second lower roll and the first lower roll are connected in a sliding friction manner through the lubricating oil.

5. A pipe rolling apparatus as claimed in claim 1, wherein said second lower roll comprises:

the bearing sleeve is sleeved and limited on the rotating shaft of the first lower roller;

the bearing is sleeved on the outer circumference of the bearing sleeve and can rotate around the circumferential direction of the bearing sleeve; and

the roller body is sleeved on the outer circumference of the bearing and can rotate around the circumference of the bearing, the rotation of the roller body is controlled by the movement of ingredients or steel pipes, and a gap is formed between the roller body and the first lower roller.

6. A pipe rolling apparatus as claimed in claim 4, wherein said second lower roll is provided with oil filling holes adapted to fill said oil sumps with oil.

7. The pipe rolling device according to claim 5, wherein bearing end caps are respectively disposed on two side surfaces of the second lower roll, the bearing end caps are fixedly disposed on the side walls of the roll body and used for sealing and blocking the bearings from moving axially, a through hole is disposed in the middle of each bearing end cap, and the rotating shaft of the first lower roll is disposed in the through hole and connected with the inner wall of the through hole in a sliding and sealing manner.

8. A tubing rolling apparatus as claimed in claim 3 wherein said work rolls are provided with a plurality of bends in the form of a dogleg configuration having a circular arc transition.

9. A pipe rolling device as claimed in claim 6, wherein the outer port of the oil filler hole is provided with an end plug for preventing leakage of the lubricating oil.

10. The pipe rolling device according to claim 1, wherein the upper roll has a rectangular cross section, and the groove structure has a trapezoidal cross section.