CN210995805U

CN210995805U - High-strength cold roll

Info

Publication number: CN210995805U
Application number: CN201921566904.5U
Authority: CN
Inventors: 朱国强
Original assignee: Hangzhou Jiuyun Roller Co ltd
Current assignee: Hangzhou Jiuyun Roller Co ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-07-14
Anticipated expiration: 2029-09-19

Abstract

The utility model relates to a cold roll technical field just discloses a cold roll of high strength, including roller head, roll body and solid fixed ring, the roll body with the roller head is integrated into one piece, gu fixed ring passes through the bolt fastening the both ends of roll body, the roll body is the cylinder, the roll body surface sets up a plurality of sand grip. This cold roll of high strength, make through using low chromium material, the quench hardening layer is very shallow, the possibility that the crackle appears reduces, it is more reliable through friction transmission moment to compare through the sand grip transmission moment of inversion trapezoidal form, through set up the telescope tube between roll body and roller shell, the effect of buffering has been played, avoid the roller shell spalling, through cooling channel and coolant liquid hole, let in coolant liquid hole and cooling channel with the coolant liquid, the produced high temperature of cold roll in the use has been reduced, reduce the problem because of overheated thermal energy and the crackle that causes, the intensity of cold roll has been strengthened, the life of cold roll has been improved.

Description

High-strength cold roll

Technical Field

The utility model relates to a cold roll technical field specifically is a cold roll of high strength.

Background

The main working parts and tools on the rolling mill produce continuous plastic deformation of the metal. The roller is input into an important component of the rolling mill and mainly comprises a roller body, a roller neck and a shaft head. The roll body is the middle part of the roll that actually participates in rolling metal. It has a smooth cylindrical or grooved surface. The roll neck is mounted in bearings and transmits the rolling force to the stand through a bearing block and a screw down device. The driving end shaft head is connected with the gear seat through a connecting shaft, and the rotating torque of the motor is transmitted to the roller. The rolls may be arranged in two, three, four or more rolls in the mill stand. In the 70's of the 20 th century, induction heating and cold treatment technologies appeared in roll manufacturing technologies, so that the depth of a hardening layer of a roll was increased from less than 10mm to about 15 mm. The cold roll after induction quenching has surface hardening layer producing residual compressive stress and core producing residual tensile stress. Because the induction heating is limited in a certain depth of the surface layer, the internal temperature of the roller is still lower, so the residual stress generated after quenching is smaller than that of the integral quenching, and the roller does not need to drill a central hole any more. Induction hardening is rapidly becoming the mainstream technology for cold roll manufacturing due to its various advantages. The existing cold roll bears great rolling stress in the working process, particularly, the roll sleeve and the roll body are easy to slip after the cold roll is used for a period of time, and the problems of welding seams, inclusion, edge cracks and the like of a rolled piece easily cause instant high temperature, so that the working roll is subjected to strong thermal shock, and cracks, roll sticking, peeling and even scrapping are caused due to thermal expansion caused by heat. To this end, we propose a high strength cold roll.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The not enough to prior art, the utility model provides a cold roll of high strength possesses advantages such as effectively reducing roll service temperature, effective buffering roll inflation and improvement roll life, has solved the problem of proposing among the above-mentioned background art.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a cold roll of high strength, includes roller head, roll body and solid fixed ring, the roll body with the roller head is integrated into one piece, gu fixed ring passes through the bolt fastening the both ends of roll body, the roll body is the cylinder, the roll body surface sets up a plurality of sand grip, the roll body surface still is provided with telescope tube and roller shell, the telescope tube cup joints the roll body surface, the roller shell cup joints the surface of telescope tube, set up the coolant liquid hole in the roller shell, and the coolant liquid hole is the circumference shape and arranges, the quantity in coolant liquid hole with the quantity of sand grip is the same, coolant liquid downthehole surface is provided with the screw thread wall, and the downthehole intermediate position of coolant liquid is provided with the one deck baffle, be provided with the filter screen on the baffle.

Preferably, the roller head and the roller body are integrally formed during processing and are made of low-chromium materials.

Preferably, the telescopic sleeve is sleeved on the outer surface of the roller body and is connected with the roller body in an interference fit manner.

Preferably, the cross section of each convex strip is in an inverted trapezoidal shape.

Preferably, a through cooling channel is arranged in the roller head and the roller body.

(III) advantageous effects

Compared with the prior art, the utility model provides a cold roll of high strength possesses following beneficial effect:

1. the high-strength cold roll is made of the low-chromium material, so that when microcracks appear on the surface of the cold roll and are not removed in time, the microcracks can slowly expand along the radial direction and the circumferential direction along with the rolling and further peel off, and when the microcracks are seriously expanded along the radial direction, the depth of the radial expansion is generally the depth of a hardening layer. If the hardened layer is deep, the possibility of cracks occurring inside during quenching is increased, and thus, the occurrence of spalling directly results in scrap and a large loss. Thereby prolonging the service life of the cold roll in the actual use process.

2. This cold roll of high strength compares through the sand grip transmission torque of invering trapezoidal form and passes through friction transmission torque more reliably, makes roll life longer. And set up the telescope tube between roll body and roller shell, the hardness of telescope tube is less than roller shell, roll body, and when the roll is heated the inflation, the telescope tube is extruded to play the effect of buffering, avoid the buffering not enough to lead to the roller shell spalling, improve the life of roll, reduced manufacturing cost.

3. This cold roll of high strength, through the coolant liquid hole that sets up at the coolant liquid hole that runs through and at the roller shell of the cooling channel that runs through that sets up in roller head and roll body, let in coolant liquid hole and coolant liquid channel, threaded wall and the baffle through setting up at coolant liquid downthehole wall have increased area of contact, coolant liquid can form circulation channel through the obstruction of coolant liquid hole through the baffle simultaneously, the produced high temperature of cold roll in the use has effectively been reduced, reduce the problem because of overheated thermal energy and the crackle that causes, the intensity of cold roll has been strengthened, the life of cold roll has been improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the structure of the present invention;

FIG. 3 is a schematic view of the structure of the telescopic sleeve of the present invention;

fig. 4 is a schematic view of the structure of the coolant holes of the present invention.

In the figure: 1 roller head, 2 roller bodies, 3 fixing rings, 4 cooling channels, 5 roller sleeves, 6 cooling liquid holes, 7 telescopic sleeves, 8 convex strips, 9 thread walls and 10 partition plates.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-4, the high-strength cold roll comprises a roll head 1, a roll body 2 and a fixing ring 3, wherein the roll head 1 and the roll body 2 are integrally formed during processing and are made of a low-chromium material, and by using the cold roll made of the low-chromium material, when microcracks appear on the surface of the cold roll and are not removed in time, the microcracks can slowly expand along the radial direction and the circumferential direction along with the rolling process and further peel off, the radial expansion depth is generally the depth position of a hardening layer in serious cases, if the hardening layer is deep, the possibility of cracks appearing in the interior during quenching is increased, and the peeling off directly causes scrap and has large loss. Thereby improving the service life of the cold roll in the actual use process, the through cooling channel 4 is arranged in the roll head 1 and the roll body 2, the fixing ring 3 is fixed at the two ends of the roll body 2 through bolts, the roll body 2 is a cylinder, the outer surface of the roll body 2 is provided with a plurality of convex strips 8, the cross sections of the convex strips 8 are in an inverted trapezoid shape, the moment is more reliably transmitted through friction through the convex strips 8 in the inverted trapezoid shape, the service life of the roll is longer, the outer surface of the roll body 2 is also provided with the telescopic sleeve 7 and the roll sleeve 5, the telescopic sleeve 7 is sleeved on the outer surface of the roll body 2 and is connected with the roll body 2 in an interference fit way, the telescopic sleeve 7 is arranged between the roll body 2 and the roll sleeve 5, the hardness of the telescopic sleeve 7 is smaller than that of the roll sleeve 5 and the roll body 2, when the roll, avoid the not enough bloated fracture of roller shell 5 that leads to of buffering, improve the life of roll, reduced manufacturing cost, roller shell 5 cup joints the surface at expansion sleeve 7, coolant hole 6 has been seted up in roller shell 5, and coolant hole 6 is the circumference shape and arranges, the quantity of coolant hole 6 with the quantity of sand grip 8 is the same, coolant hole 6 internal surface is provided with screw thread wall 9, and the inside intermediate position of coolant hole 6 is provided with one deck baffle 10, be provided with the filter screen on the baffle 10, roll body 2 cup joints the surface at expansion sleeve 7 and uses interference fit with expansion sleeve 7 to be connected, through the cooling channel 4 that runs through that sets up in roller head 1 and roll body 2 and the coolant hole 6 that sets up in the roller shell, lets in coolant liquid hole 6 and cooling channel 4, through the screw thread wall 9 and the baffle 10 that set up at coolant hole 6 inner wall, increased area of contact, meanwhile, the cooling liquid passes through the cooling liquid holes 6 and can form a circulating channel through the blocking energy of the partition plate 10, so that the high temperature generated in the use process of the cold roll is effectively reduced, the problems of thermal expansion and cracks caused by overheating are solved, the strength of the cold roll is enhanced, and the service life of the cold roll is prolonged.

Principle of operation

This cold roll of high strength lets in cooling channel 4 and coolant liquid hole 6 with the coolant liquid through rotary joint when using, takes away a cold roll partly heat at the during operation, and simultaneously, heat makes roll body 2, roll shell 5, the expansion of expansion sleeve 7 in the roll, because the hardness of expansion sleeve 7 is lower than roll shell 5, roll body 2, so expansion sleeve 7 is extruded in the centre, plays the effect of buffering, avoids leading to roll shell 5 by the spalling. The fixing ring 3 prevents the telescopic sleeve 7 and the roller sleeve 5 from axially moving.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cold roll of high strength, includes roller head (1), roll body (2) and solid fixed ring (3), its characterized in that: the roller body (2) and the roller head (1) are integrally formed, the fixing rings (3) are fixed at two ends of the roller body (2) through bolts, the roller body (2) is a cylinder, a plurality of convex strips (8) are arranged on the outer surface of the roller body (2), a telescopic sleeve (7) and a roller sleeve (5) are further arranged on the outer surface of the roller body (2), the telescopic sleeve (7) is sleeved on the outer surface of the roller body (2), the roller sleeve (5) is sleeved on the outer surface of the telescopic sleeve (7), cooling liquid holes (6) are formed in the roller sleeve (5), the cooling liquid holes (6) are arranged in a circumferential shape, the number of the cooling liquid holes (6) is the same as that of the convex strips (8), threaded walls (9) are arranged on the inner surface of the cooling liquid holes (6), and a layer of partition plates (10) are arranged in the middle positions inside the cooling liquid holes (6), a filter screen is arranged on the clapboard (10).

2. A high strength cold roller according to claim 1, characterized in that: the roller head (1) and the roller body (2) are integrally formed during processing and are made of low-chromium materials.

3. A high strength cold roller according to claim 1, characterized in that: the telescopic sleeve (7) is sleeved on the outer surface of the roller body (2) and is connected with the roller body (2) in an interference fit mode.

4. A high strength cold roller according to claim 1, characterized in that: the roller body (2) is sleeved on the outer surface of the telescopic sleeve (7) and is connected with the telescopic sleeve (7) in an interference fit mode.

5. A high strength cold roller according to claim 1, characterized in that: the cross section of the convex strip (8) is in an inverted trapezoidal shape.

6. A high strength cold roller according to claim 1, characterized in that: and a through cooling channel (4) is arranged in the roller head (1) and the roller body (2).