CN212370824U - Four-high mill backing roll structure - Google Patents
Four-high mill backing roll structure Download PDFInfo
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- CN212370824U CN212370824U CN202020677270.7U CN202020677270U CN212370824U CN 212370824 U CN212370824 U CN 212370824U CN 202020677270 U CN202020677270 U CN 202020677270U CN 212370824 U CN212370824 U CN 212370824U
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- roller body
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Abstract
A four-high mill supporting roll structure is disclosed, wherein the supporting roll consists of a roll body and a roll neck; the roll necks are positioned at two sides of the roll body, and the supporting roll is assembled with the rolling mill body frame through the roll necks; it is characterized in that: the roller body is a revolving body formed by a straight line part and a parabola part combined bus, areas from one sixth to one third of the distance between two ends of the roller body and the center point of the roller body are set harmful contact areas, and the middle part of the roller body and the harmful contact areas at the two ends are in smooth transition. The utility model discloses a to the curved optimal design of backing roll shaft, reached reduce harmful contact area influence, reduce the backing roll loss, avoid appearing the purpose that the tip quench hardening layer drops and collapses the limit phenomenon.
Description
Technical Field
The utility model relates to a belted steel sheet production facility, especially a four high mill backing roll structure suitable for belted steel sheet rolling shaping.
Background
At present, the steel strip plate is widely applied to the fields of agriculture, industry, national defense facilities and the like, and plays a very important role in national economic development, so that the production of the steel strip plate becomes a hot problem for the research of the steel industry. The strip steel plate is generally formed by rolling by a rolling mill device, the rolling mill device is provided with a supporting roll and a working roll, wherein the working roll is a roll which is directly contacted with the blank and deforms the blank by rolling to finally obtain the strip steel plate; and the supporting rollers are rollers which are arranged on the back or the side of the working rollers for increasing the rigidity and the strength of the working rollers and are not directly contacted with rolled pieces. The supporting roller is mostly made of 9CR2Mo material, the surface hardness of the supporting roller is improved through tempering treatment after quenching, as shown in attached drawings 1 and 2, in the prior art, two ends of a roller body 1 of the supporting roller adopt chamfer transition structures 1-1, because the supporting roller needs to bear extremely large bending moment in the rolling process of strip steel plates, the contact pressure between two axial ends of the roller body and a working roller is large, and a harmful contact area A is formed, so that the phenomena of falling off and edge breakage of a hardening layer at the end part of the supporting roller are easily caused, the surface quality of a rolled piece is also influenced, in addition, the production cost of the supporting roller is high, the purchase period is long, once the damage accident of the supporting roller occurs, the whole steel rolling production line is stopped, and great economic loss is caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a four-high mill backing roll structure aims at reaching through the optimal design to the backing roll shaft body curve that reduce harmful contact area influence and backing roll loss, avoid appearing the purpose that the shaft tip hardening layer drops and collapses the limit phenomenon.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a four-high mill supporting roll structure is disclosed, wherein the supporting roll consists of a roll body and a roll neck; the roll necks are positioned at two sides of the roll body, and the supporting roll is assembled with the rolling mill body frame through the roll necks; it is characterized in that: the roller body is a revolving body formed by a straight line part and a parabola part combined bus, areas from one sixth to one third of the distance between two ends of the roller body and the center point of the roller body are set harmful contact areas, and the middle part of the roller body and the harmful contact areas at the two ends are in smooth transition.
In the supporting roller structure of the four-high rolling mill, the parabolic part of the roller body bus is a high-order curve, and the functional expression of the high-order curve is as follows:
wherein:
=0.0645247117， 
=-0.000312293966， 
=7.68308556×10-7，
=-102312079 ×10-9， 
=7.02992226×10-13， 
=-1.95275618×10-16。
according to the four-high rolling mill supporting roller structure, when the width of a strip steel rolled piece is 1050mm, and the unit width rolling force is QS =0.58t/mm, the length of a roller body is 1200mm, the bending force BF =500KN is provided when the supporting roller is in a working state, the contact pressure between a harmful contact area and a working roller is in a uniform distribution state, and the maximum value of the contact pressure in the unit length is 1.14 t/mm.
According to the four-high rolling mill supporting roller structure, when the width of a strip steel rolled piece is 1050mm, and the unit width rolling force is QS =0.83t/mm, the length of a roller body is 1200mm, the bending force BF =500KN is provided when the supporting roller is in a working state, the contact pressure between a harmful contact area and a working roller is in a uniform distribution state, and the maximum value of the contact pressure in the unit length is 1.21 t/mm.
The utility model provides a four high mill backing roll structure, the body of a roll of this backing roll is for the solid of revolution that is formed by straight line portion and parabola portion combination generating line, owing to formed the plain barreled of cylinder structure at the body of a roll middle part, forms the curved surface structure at the harmful contact zone in body of a roll both ends to body of a roll middle part and the harmful contact zone smooth transition in both ends make contact pressure be the evenly distributed situation between the harmful contact zone of body of a roll and the working roll with this. The utility model discloses through on-the-spot proof of trying: when belted steel width is 1050mm, unit width rolling force QS equals 0.58 respectively, when 0.83t/mm, contact pressure peak value between this backing roll and the working roll and current backing roll comparison respectively descend 12.3%, 17.8%, this novel contact pressure unevenness between the patent backing roll compares and descends 34.8% and 42% respectively with former roll-shape, can see from this, the utility model discloses an to the curved optimal design of backing roll shaft, reached and reduced the regional influence of harmful contact, reduced the backing roll loss, avoided appearing the purpose that tip quench hardening layer drops and bursts at the limit phenomenon.
Drawings
FIG. 1 is a schematic structural diagram of a supporting roller of a four-high mill;
FIG. 2 is an enlarged view of the structure of a supporting roll of a four-high rolling mill in the prior art corresponding to the position I in FIG. 1;
FIG. 3 is an enlarged view of the supporting roller of the present invention corresponding to the portion I in FIG. 1;
fig. 4 is a schematic view of the contact pressure distribution between the support roller and the working roller according to the present invention;
FIG. 5 is a graph showing the relationship between the length of the roll body and the feed amount in grinding the back-up roll.
The list of labels in the figure is:
1. 1-1 part of a roller body, 1-2 parts of a chamfer transition structure, 1-3 parts of a parabolic part and 1-3 parts of a straight line part; 2. a roll neck;
A. a harmful contact area.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 3, the utility model provides a four-high mill support roll structure, which comprises a roll body 1 and a roll neck 2; the roll neck 2 is positioned at two sides of the roll body 1, and the supporting roll is assembled with the rolling mill body frame through the roll neck 2; the roller body 1 is a revolving body formed by a combined generatrix of a straight line part 1-3 and a parabolic part 1-2, the parabolic part 1-2 is a high-order curve, and the functional expression of the high-order curve is as follows:
wherein:
=0.0645247117， 
=-0.000312293966， 
=7.68308556×10-7，
=-102312079 ×10-9， 
=7.02992226×10-13， 
=-1.95275618×10-16the areas of one sixth to one third of the distance between the two ends of the roller body 1 and the central point are set harmful contact areas A, and the middle part of the roller body 1 and the harmful contact areas A at the two ends are in smooth transition.
Referring to fig. 4, the solid line type curve in the figure is the contact pressure distribution curve between the supporting roll and the working roll in the embodiment of the present invention, and the dotted line type curve is the contact pressure distribution curve between the supporting roll and the working roll in the prior art.
The utility model discloses a first preferred embodiment does: aiming at a 1250 type four-roller mill production device, when the width of a strip steel rolled piece is 1050mm, and the unit width rolling force is QS =0.58t/mm, the length of a roller body 1 is 1200mm, the supporting roller provides bending force BF =500KN under the working state, the contact pressure distribution curve between a harmful contact area A and the working roller is a solid line marked with 'QS =0.58 t/mm' in the graph, and the maximum value of the unit length contact pressure is P1，=1.14 t/mm. In this embodiment, the peak value of the contact pressure between the harmful contact area a of the roll body 1 and the work roll is reduced by 12.3% compared with the existing support roll, and the unevenness of the contact pressure between the support roll and the work roll is reduced by 34.8% compared with the original roll shape.
The utility model discloses the second preferred embodiment does: aiming at a 1250 type four-roller mill production device, when the width of a strip steel rolled piece is 1050mm, and the unit width rolling force is QS =0.83t/mm, the length of a roller body 1 is 1200mm, the supporting roller provides bending force BF =500KN under the working state, the contact pressure distribution curve between a harmful contact area A and the working roller is a solid line marked with 'QS =0.83 t/mm' in the graph, and the maximum value of the unit length contact pressure is P1，=1.21 t/mm. In this embodiment, the peak value of the contact pressure between the harmful contact area a of the roll body 1 and the work roll is reduced 17.8.3% compared with the existing support roll, and the unevenness of the contact pressure between the support roll and the work roll is reduced by 42% compared with the original roll shape.
Referring to fig. 5, the utility model discloses well four high rolling mill backing rolls can at first input roll body length and feed volume matching relation functional formula in the numerically controlled grinder control system when making, then call out on the numerically controlled grinder control panel as shown in the figure curve carry on the grinding can.
Claims (4)
1. A supporting roller structure of a four-high mill comprises a roller body (1) and a roller neck (2); the roll neck (2) is positioned at two sides of the roll body (1), and the supporting roll is assembled with the rolling mill body frame through the roll neck (2); the method is characterized in that: the roller body (1) is a revolving body formed by a combined generatrix of a straight line part (1-3) and a parabolic part (1-2), areas between two ends of the roller body (1) and the center point of the roller body from one sixth to one third are set harmful contact areas (A), and the middle part and the two ends of the roller body (1) are in smooth transition with the harmful contact areas (A).
2. A four high rolling mill support roll structure as claimed in claim 1, wherein: the generatrix parabola part (1-2) of the roller body (1) is a high-order curve, and the function expression of the high-order curve is as follows:
wherein:
=0.0645247117， 
=-0.000312293966， 
=7.68308556×10-7，
=-102312079 ×10-9， 
=7.02992226×10-13， 
=-1.95275618×10-16。
3. a four high rolling mill support roller structure as claimed in claim 2, wherein: when the width of a strip steel rolled piece is 1050mm and the unit width rolling force is QS =0.58t/mm, the length of a roller body (1) is 1200mm, the bending force BF =500KN is provided by the supporting roller in a working state, the contact pressure between a harmful contact area (A) and a working roller is in a uniform distribution state, and the maximum value of the contact pressure in the unit length is 1.14 t/mm.
4. A four high rolling mill support roller structure as claimed in claim 2, wherein: when the width of a strip steel rolled piece is 1050mm and the unit width rolling force is QS =0.83t/mm, the length of a roller body (1) is 1200mm, the bending force BF =500KN is provided by the supporting roller in a working state, the contact pressure between a harmful contact area (A) and a working roller is in a uniform distribution state, and the maximum value of the contact pressure in the unit length is 1.21 t/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020677270.7U CN212370824U (en) | 2020-04-28 | 2020-04-28 | Four-high mill backing roll structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020677270.7U CN212370824U (en) | 2020-04-28 | 2020-04-28 | Four-high mill backing roll structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212370824U true CN212370824U (en) | 2021-01-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020677270.7U Active CN212370824U (en) | 2020-04-28 | 2020-04-28 | Four-high mill backing roll structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212370824U (en) |
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2020
- 2020-04-28 CN CN202020677270.7U patent/CN212370824U/en active Active
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