CN211330731U

CN211330731U - Detachable spiral cold roll

Info

Publication number: CN211330731U
Application number: CN201922058081.1U
Authority: CN
Inventors: 盛明荣
Original assignee: Jiangsu Liwan Precision Tube Manufacturing Co ltd
Current assignee: Jiangsu Liwan Precision Tube Manufacturing Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-08-25
Anticipated expiration: 2029-11-26

Abstract

The utility model discloses a detachable spiral cold roll, include: roll body and dabber have seted up the roll groove on the roll body, the roll groove comprises two sections first arc wall and the second arc wall that the inner arc radius is different, is provided with the cavity that runs through the roll body along the axis direction on the roll body, is provided with first recess on the cavity, the dabber can wear to establish in the cavity on the roll body and the both ends of dabber outwards stretch out in the cavity, is provided with protruding muscle at the spindle, and protruding muscle can wear to establish in first recess, is provided with at the spindle and can fixes the roll body at the epaxial stop device of dabber. The utility model has the advantages that: the steel with larger caliber can be rolled into the required pipe with smaller caliber without replacing the cold roll, so that the production efficiency is greatly improved; the core shaft and the roller body are of a detachable structure, and when the roller body is damaged, only the roller body needs to be scrapped and replaced independently, so that the production cost is greatly reduced.

Description

Detachable spiral cold roll

Technical Field

The utility model relates to a detachable spiral cold roll.

Background

Cold rolls are important parts of rolling mills in steel mills, and roll steel by using pressure generated when a pair or a group of cold rolls roll, so that the steel is gradually formed into required pipes. In the forming process, when the steel with a larger caliber size needs to be rolled into the pipe with a smaller caliber size, the steel needs to be rolled by the cold roll with the roll groove with a larger inner arc radius, and then the cold roll with the roll groove with a smaller inner arc radius needs to be replaced for secondary rolling, so that the steel can be rolled into the pipe with a required size. The working mode that the cold rollers with different specifications need to be replaced for rolling is adopted, so that the production efficiency is greatly reduced. The roller body and the mandrel of the existing cold roller are of an integrated structure, and the roller body and the mandrel need to be replaced together when the cold roller is replaced, so that the operation is very complicated; and when the roller body on the cold roll is damaged, the damaged roller body and the intact mandrel need to be replaced and scrapped together, so that the operation is complicated, the intact mandrel is scrapped, great waste is caused, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can improve production efficiency and can also reduction in production cost's a detachable spiral cold roll.

In order to achieve the above object, the utility model adopts the following technical scheme: a detachable helical cold roll comprising: the roller comprises a roller body and a mandrel, wherein a roller groove is formed in the roller body along the circumference, the roller groove is composed of a first arc groove and a second arc groove, the two sections of the first arc groove and the second arc groove are different in inner arc radius, the first arc groove and the second arc groove are in smooth transition connection, a cavity penetrating through the roller body is formed in the roller body along the axis direction, a first groove is formed in the cavity, the mandrel can be arranged in the cavity in a penetrating mode, the two ends of the mandrel outwards extend out of the cavity, a convex rib is arranged on the mandrel and is the same as the cross-sectional shape of the first groove, the convex rib can be arranged in the first groove in a penetrating mode, and a limiting device capable of fixing the roller body on the mandrel is arranged.

Further, aforementioned detachable spiral cold-rolling roller, wherein, stop device includes: the two belt shaft limiting discs are in the same structure, abut against two ends of the roller body respectively and are fixed on the mandrel, through holes capable of being matched with the mandrel are formed in the belt shaft limiting discs along the axial direction, second grooves capable of being matched with the convex ribs are formed in the through holes, and a plurality of connecting holes are formed in the shaft on the belt shaft limiting discs at intervals along the circumference; and a plurality of threaded holes are respectively formed in the two ends of the mandrel extending out of the roller body at intervals along the circumference, and the connecting holes in the two belt shaft limiting discs are aligned with the threaded holes in any end of the mandrel one by one and connected through bolts.

Furthermore, the detachable spiral cold roll is characterized in that four connecting holes are uniformly formed in the shaft with the shaft limiting disc at intervals along the circumference, and four threaded holes are uniformly formed in the two ends of the core shaft at intervals along the circumference.

Further, aforementioned detachable spiral cold roll, wherein, the inner arc radius size difference between first arc wall and the second arc wall is not more than 20 mm.

Further, aforementioned detachable spiral cold-rolling roller, wherein, cavity, through-hole and dabber are the cylindrical shape.

Further, aforementioned detachable spiral cold-rolling roller, wherein, the cross section of first recess, second recess and protruding muscle is the rectangle shape.

Further, the detachable spiral cold roll is characterized in that the depth of the first groove on the roll body and the depth of the second groove on the belt shaft limiting disc are larger than the height of the convex rib, and when the roll body and the belt shaft limiting disc are sleeved on the mandrel, a gap of 2-3mm is reserved between the top of the first groove and the second groove of the belt shaft and the top of the convex rib.

The utility model has the advantages that: the steel with larger caliber can be rolled into the required pipe with smaller caliber without replacing the cold roll, so that the production efficiency is greatly improved; when the roller body on the cold roller is damaged and needs to be replaced and scrapped, only the damaged roller body needs to be detached from the mandrel, and then a new roller body is installed on the mandrel, so that the mandrel cannot be scrapped along with the damaged roller body, and the production cost is greatly reduced.

Drawings

Fig. 1 is a schematic structural view of a detachable spiral cold roll of the present invention.

Fig. 2 is a schematic view of the structure in the right-hand direction of fig. 1.

Fig. 3 is a schematic sectional view of the roller body in fig. 1 in the direction a-a.

Fig. 4 is a schematic structural view of the belt shaft limiting disc in fig. 1.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1, fig. 2, fig. 3, and fig. 4, the present invention provides a detachable spiral cold rolling roller, comprising: roll body 1 and dabber 2 have seted up the roll groove along the circumference on roll body 1, the roll groove comprises first arc wall 11 and second arc wall 12 that two sections inner arc radiuses are different, and slick and sly transitional coupling between first arc wall 11 and the second arc wall 12, in this embodiment, the inner arc radius of first arc wall 11 is greater than the inner arc radius of second arc wall 12, and the inner arc radius size difference between first arc wall 11 and the second arc wall 12 is not more than 20 mm. A cylindrical cavity 13 penetrating through the roller body 1 is arranged on the roller body 1 along the axial direction, a first groove 14 is arranged on the cavity 13, and the cross section of the first groove 14 is rectangular. The mandrel 2 is cylindrical, the mandrel 2 can penetrate through the cavity 13 on the roller body 1, two ends of the mandrel 2 extend out of the cavity 13, the mandrel 2 is provided with a convex rib 21, the cross section of the convex rib 21 is rectangular, the convex rib 21 can penetrate through the first groove 14, and when the roller body 1 is sleeved on the mandrel 2, a gap of 2-3mm is reserved between the top of the first groove 14 and the top of the convex rib 21. In this embodiment, a gap of 2mm is left between the top of the first groove 14 and the top of the rib 21. Be provided with on dabber 2 and fix the stop device on dabber 2 with roll body 1, stop device includes: the two belt shaft limiting discs 3 are the same in structure, the two belt shaft limiting discs 3 are respectively abutted against two ends of the roller body 1 and fixed on the mandrel 2, through holes 31 capable of being matched with the mandrel 2 are formed in the belt shaft limiting discs 3 along the axis direction, the through holes 31 are the same as the cavity 13 in the roller body 1 and are cylindrical in shape, second grooves 32 capable of being matched with the convex ribs 21 are formed in the through holes 31, the cross sections of the second grooves 32 are the same as the cross sections of the first grooves 14 and are rectangular in shape, and after the belt shaft limiting discs 3 are sleeved on the mandrel 2, gaps of 2-3mm are reserved between the tops of the second grooves 32 and the tops of the convex ribs 21. In this embodiment, a gap of 2mm is left between the top of the second groove 32 and the top of the rib 21. Four connecting holes 33 are uniformly arranged on the shaft limiting disc 3 at intervals along the circumference, four threaded holes are respectively arranged at two ends of the mandrel 2 extending out of the roller body 1 at intervals along the circumference, and the connecting holes 33 on the two shaft limiting discs 3 are aligned with the threaded holes on any end of the mandrel 2 one by one. When the connecting holes 33 on the two belt shaft limiting discs 3 are aligned with the threaded holes on the mandrel 2 one by one, the two belt shaft limiting discs 3 are respectively abutted against two ends of the roller body 1, then the bolts 4 penetrate through the connecting holes 33 and then are connected with the threaded holes on the mandrel 2, so that the belt shaft limiting discs 3 can be fixed on the mandrel 2, and the roller body 1 is limited on the mandrel 2. When dismouting roll body 1, take out bolt 4 from screw hole and connecting hole 33 aligned, then take off two spacing dishes 3 of band axle from dabber 2, just so can take off roll body 1 from dabber 2.

When the cold rolls with the structure are used for rolling, the two cold rolls are installed on the cold rolling mill in pairs, in the rolling process, the first arc-shaped grooves 11 on the two cold rolls are mutually closed to roll steel for the first time, and then the second arc-shaped grooves 12 on the two cold rolls are mutually closed to roll for the second time, so that the pipe blank is rolled to form the pipe with the required size.

Claims

1. A detachable helical cold roll comprising: roll body and dabber, its characterized in that: the roller body is provided with a roller groove along the circumference, the roller groove consists of a first arc groove and a second arc groove with two sections of different inner arc radiuses, the first arc groove and the second arc groove are in smooth transition connection, a cavity penetrating through the roller body is arranged on the roller body along the axis direction, a first groove is arranged on the cavity, the mandrel can be arranged in the cavity on the roller body in a penetrating mode, the two ends of the mandrel outwards extend out of the cavity, a convex rib is arranged on the mandrel, the cross section of the convex rib is the same as that of the first groove, the convex rib can be arranged in the first groove in a penetrating mode, and a limiting device capable of fixing the roller body on the mandrel is arranged on the mandrel.

2. The detachable spiral cold roll according to claim 1, characterized in that: the stop device includes: the two belt shaft limiting discs are in the same structure, abut against two ends of the roller body respectively and are fixed on the mandrel, through holes capable of being matched with the mandrel are formed in the belt shaft limiting discs along the axial direction, second grooves capable of being matched with the convex ribs are formed in the through holes, and a plurality of connecting holes are formed in the shaft on the belt shaft limiting discs at intervals along the circumference; and a plurality of threaded holes are respectively formed in the two ends of the mandrel extending out of the roller body at intervals along the circumference, and the connecting holes in the two belt shaft limiting discs are aligned with the threaded holes in any end of the mandrel one by one and connected through bolts.

3. The detachable spiral cold roll according to claim 2, characterized in that: four connecting holes are uniformly arranged on the shaft of the belt shaft limiting disc at intervals along the circumference, and four threaded holes are respectively and uniformly arranged at two ends of the mandrel at intervals along the circumference.

4. A detachable cold-rolling spiral roll according to claim 1, 2 or 3, characterized in that: the difference of the inner arc radius sizes between the first arc-shaped groove and the second arc-shaped groove is not more than 20 mm.

5. The detachable spiral cold roll according to claim 2, characterized in that: the cavity, the through hole and the mandrel are all in cylindrical shapes.

6. The detachable spiral cold roll according to claim 2, characterized in that: the cross sections of the first groove, the second groove and the convex rib are all rectangular.

7. A detachable cold-rolling spiral roll according to claim 1, 2 or 3, characterized in that: the depth of the first groove on the roller body and the depth of the second groove on the belt shaft limiting disc are larger than the height of the convex rib, and when the roller body and the belt shaft limiting disc are sleeved on the mandrel, a gap of 2-3mm is reserved between the top of the first groove and the belt shaft second groove and the top of the convex rib.