CA1055726A - Roller force load cell - Google Patents
Roller force load cellInfo
- Publication number
- CA1055726A CA1055726A CA247,620A CA247620A CA1055726A CA 1055726 A CA1055726 A CA 1055726A CA 247620 A CA247620 A CA 247620A CA 1055726 A CA1055726 A CA 1055726A
- Authority
- CA
- Canada
- Prior art keywords
- load cell
- plate
- pressure
- distribution block
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0009—Force sensors associated with a bearing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Crushing And Grinding (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
Load cell construction for measuring the roller force in a rolling mill and located below the lower supporting roller bearing housing of the rolling mill. It comprises a load cell and pressure distribution blocks and the pressure distribution block arranged on the load cell is provided on its upper side with a rocker or cradle, turned upside down, a pressure plate arranged on the under side of the bearing housing making contact with the upper, convex surface of the rocker or cradle.
Load cell construction for measuring the roller force in a rolling mill and located below the lower supporting roller bearing housing of the rolling mill. It comprises a load cell and pressure distribution blocks and the pressure distribution block arranged on the load cell is provided on its upper side with a rocker or cradle, turned upside down, a pressure plate arranged on the under side of the bearing housing making contact with the upper, convex surface of the rocker or cradle.
Description
~05~726 The present invention xela~tes to a lo~d cell cons-truction for measurin~ the ~oller ~orce'in a rolling mill and which is located below the lower support~ng roller bearing housin~ of the rolling mill, comprising a load cell and a pres-sure distribution ~lock.
In known constructions the load cell is arranged in `
the housing of the mill. On top of the load cell there lies a pressure distribution block in order to distribute the roller force as evenly as possible over the load cell. On top of the pressure distr~ution block there are a number of adjusting plates or shims and a~ove these a flat supporting plate. A
cradle or rocker with a convex surface facing downwards is attached to the under surface of the lower roller bearing, said cradle or rocker making contact with said flat supporting plate~
Such a construction must fulfil two demands, na,mely, on the one hand, that the load shall be evenly distributed along the surface of the load cell, and on the other hand that lateral forces on the load cell shall be avoided. ' '~
To satisfy the first of the above demands, the fol- ~-lowing is required: -1. There must be sufficiently thick material between the ~rocker and the load cell in order for the linear force of the rocker to be evenly distributed on the surface of the load cell.
In known constructions the load cell is arranged in `
the housing of the mill. On top of the load cell there lies a pressure distribution block in order to distribute the roller force as evenly as possible over the load cell. On top of the pressure distr~ution block there are a number of adjusting plates or shims and a~ove these a flat supporting plate. A
cradle or rocker with a convex surface facing downwards is attached to the under surface of the lower roller bearing, said cradle or rocker making contact with said flat supporting plate~
Such a construction must fulfil two demands, na,mely, on the one hand, that the load shall be evenly distributed along the surface of the load cell, and on the other hand that lateral forces on the load cell shall be avoided. ' '~
To satisfy the first of the above demands, the fol- ~-lowing is required: -1. There must be sufficiently thick material between the ~rocker and the load cell in order for the linear force of the rocker to be evenly distributed on the surface of the load cell.
2. The linear contact of the rocker must be at the centre of the load cell.
3. All pressure equalizing plates between the rocker and ~ -the housing must possess very fine tolerance~ as to flatness, about 25 microns.
As far as the second of the above demands i5 con-cerned it ma~ be said that th occurrence of the lateral force, which'is txan~mitted to t~e'load ceIl through the rocker,,cannot be prevented~ Therefore thb'later'al force must be conducted .
' )55~;~6 past the load cell.
When the load cell is buil~ in as described above, there will be great difficulties in ful~illing the requirements of points 2 and 3 above.
The load cell package is sometimes fastened directly to the bottom of the` màll stand. Often, however, it is arranged in a sled which ~s displaceable in lateral direction and which i~s removed from the mill to make room for roll changing. Great demands must be placed on the sled to be restored in the correct position after roll changing, since the condition according to point 2 above must be fulfilled. `;'' The rocker is fastened under the supporting-roller bearing housing and a change in the position of the rocker involves the same risks regarding an uncentric load on the load cell as an incorrect replacement of the sled. ' When exchanging rolls, the vertical position of the roll gap is adjusted by means of the above-mentioned adjusting t plates, which are thus included in the pressure distribution block. ' ' The mentioned demand on the flatness of these plates of course -makes it very important that no outside particles enter in between the plates while they are belng mounted down at the~
~ottom of the rolling mill.
By applying the present invention to a load cell cons- ~ ' truction of the kind described above, several of the above- ~
- mentioned drawbacks are eliminated. -Accordingly, the present invention specifically relates to a load cell device for meàsuring the roller force in a rolling mill through use of a lower supporting rol'ler bearing housing. Such ~ de~ice comprises a rame haYing up~ardly .
extending ~ide'~langes with'a load cell-mounted within the frame -~ ~etween the'~lqnges, A diaphragm plate is pIaced on~top of the load cell between the side'~langes, this diaphragm plate having ... . " . . .... . . . . . . . . . . . . ~ ... . . . . .
- - . - ... . , . : . . .. - :.. .. .. . . . ... . .. . . .
- 1~55'^i!Z6 diaphragms that extend therefrom and that ~re ~ixed ~nto the frame A pressure distribution block is mounted onto the diaphragm pl~te and ~etween the flanges such as to form a gap therebetween. The pressure distribution block has a recess in the side thereof opposite the diaphragm plate, a rocker means -being positioned in th~s recess which has a concave surface on the side opposite the side of the recess. A pressure plate is arranged in contact with the convex surface of the Pressure distribution block and there is at least one adjusting plate which is mounted on the pressure plate positionable in contact with a lower supporting roller bearing housing and functional to adjust the vertical position of the roller gap.
By placing a rocker, turned upside down, with the upwardly facing convex surface on top of the pressure distri-bution block, which is placed on top of the load cell, and with the flat pressure plate on the underside of the bearing housing facing said convex surface, a constantly centric load on the load cell is secured. The positioning of the adjusting plates between the bearing housing and the pressure plate of the rocker means that they are located in a less critical position from the point of view of pressure dis~ribution and can be mounted under more favourable conditions.
The invention also affords a simpler arrangement of protection against detrimental lateral forces on the load cell by the fact that the pressure distribution block - through lateral contact with a frame in the mill stand - transmits lateral forces ~Jhich in amount exceed the frictional force between the pressure distribution block and a diaphragm plate arranged on top of the load cell, the diaphragm neutralizing residual lateral forces.
The accompanying draw~ng shows a cross section through a load cell construction according to the invention.
' ' ' ,' ' ' - 3 ~
.
~ ' .' ' --" ` 105572~
In a recess in a frame 1 o~ sled at the bottom of the rolling mill the load cell 2 is arranyed. ~ pressure plate 3 with a well face-ground upper surface is inserted below the load cell so that it has a plane contact surface. Lateral supports 4 keep the load cell in position. Above the load cell there lies a diaphragm plate 5 which is attached to the frame by means of diaphragms 6 and screws 7. On top of the diaphra~m plate the pressure distribution block 8 is pos~tioned, which, like the diaphgram plate, has weIl-machined surfaces. The block 8 is so heavy that it provides an even and uniform transmission of the roller force to the load cell. In a recess 9 on the upper side of the block a rocker or cradle 10 is positioned, the upwardly facing surface being convex. The block 8 is slightly movable in lateral direction by means of two gaps 11 between the block and two flanges 12 on the frame, the block thus sliding on the diaphragm plate 5. The gaps are covered with cover strips 13 to prevent foreign particles from falling down into the gaps.
' The lower supporting bearing housing 1~ supports on its under side two strips 15, between which there are arranged a number of adjusting plates 16 as well as a pressure plate 17 ^-with a flat under side, resting on the convex, upper side of -;he rocker.
By the arrangement with the rocker 10, turned upside down, and its convex surface, which supports the bearing housing 14 by means of the plane surface of the pressure plate 17, the load cell will be exposed to a well centered çompressive force.
Even if, during the course of the rolling, the bearing housing is subjected to a lateral movement, the comressive force on the rocker remains unchanged as far as its point of attack is con--30 cexned. Lateral ~-oXces occurring due to lateral movements of the bearing housing 14 are transm~tted by the pressure distri- :
bution bIock 8 to the frame l as soon as t~ese lateral forces : - ,' ' 1C~55726 exceed the ~ricti~nal ~orce bet~een ~he block and the diaphragm plate 5. The diaphragms 6 neutralize the residual lateral forces.
The adjusting plates 16 lie well protected below the bearing housing and, when the supporting rolls are to be exchanged, adjusting measures need be taken only in those parts which are supported by the bearing housing~
, ' : ,. . : ' ' ' : , ~: :
. .- ~.
. ..
'` ~ ' ' . ,:
,~ . .
, . .
: : ~ 5 ~ ~:
~ : ' ''`' .
As far as the second of the above demands i5 con-cerned it ma~ be said that th occurrence of the lateral force, which'is txan~mitted to t~e'load ceIl through the rocker,,cannot be prevented~ Therefore thb'later'al force must be conducted .
' )55~;~6 past the load cell.
When the load cell is buil~ in as described above, there will be great difficulties in ful~illing the requirements of points 2 and 3 above.
The load cell package is sometimes fastened directly to the bottom of the` màll stand. Often, however, it is arranged in a sled which ~s displaceable in lateral direction and which i~s removed from the mill to make room for roll changing. Great demands must be placed on the sled to be restored in the correct position after roll changing, since the condition according to point 2 above must be fulfilled. `;'' The rocker is fastened under the supporting-roller bearing housing and a change in the position of the rocker involves the same risks regarding an uncentric load on the load cell as an incorrect replacement of the sled. ' When exchanging rolls, the vertical position of the roll gap is adjusted by means of the above-mentioned adjusting t plates, which are thus included in the pressure distribution block. ' ' The mentioned demand on the flatness of these plates of course -makes it very important that no outside particles enter in between the plates while they are belng mounted down at the~
~ottom of the rolling mill.
By applying the present invention to a load cell cons- ~ ' truction of the kind described above, several of the above- ~
- mentioned drawbacks are eliminated. -Accordingly, the present invention specifically relates to a load cell device for meàsuring the roller force in a rolling mill through use of a lower supporting rol'ler bearing housing. Such ~ de~ice comprises a rame haYing up~ardly .
extending ~ide'~langes with'a load cell-mounted within the frame -~ ~etween the'~lqnges, A diaphragm plate is pIaced on~top of the load cell between the side'~langes, this diaphragm plate having ... . " . . .... . . . . . . . . . . . . ~ ... . . . . .
- - . - ... . , . : . . .. - :.. .. .. . . . ... . .. . . .
- 1~55'^i!Z6 diaphragms that extend therefrom and that ~re ~ixed ~nto the frame A pressure distribution block is mounted onto the diaphragm pl~te and ~etween the flanges such as to form a gap therebetween. The pressure distribution block has a recess in the side thereof opposite the diaphragm plate, a rocker means -being positioned in th~s recess which has a concave surface on the side opposite the side of the recess. A pressure plate is arranged in contact with the convex surface of the Pressure distribution block and there is at least one adjusting plate which is mounted on the pressure plate positionable in contact with a lower supporting roller bearing housing and functional to adjust the vertical position of the roller gap.
By placing a rocker, turned upside down, with the upwardly facing convex surface on top of the pressure distri-bution block, which is placed on top of the load cell, and with the flat pressure plate on the underside of the bearing housing facing said convex surface, a constantly centric load on the load cell is secured. The positioning of the adjusting plates between the bearing housing and the pressure plate of the rocker means that they are located in a less critical position from the point of view of pressure dis~ribution and can be mounted under more favourable conditions.
The invention also affords a simpler arrangement of protection against detrimental lateral forces on the load cell by the fact that the pressure distribution block - through lateral contact with a frame in the mill stand - transmits lateral forces ~Jhich in amount exceed the frictional force between the pressure distribution block and a diaphragm plate arranged on top of the load cell, the diaphragm neutralizing residual lateral forces.
The accompanying draw~ng shows a cross section through a load cell construction according to the invention.
' ' ' ,' ' ' - 3 ~
.
~ ' .' ' --" ` 105572~
In a recess in a frame 1 o~ sled at the bottom of the rolling mill the load cell 2 is arranyed. ~ pressure plate 3 with a well face-ground upper surface is inserted below the load cell so that it has a plane contact surface. Lateral supports 4 keep the load cell in position. Above the load cell there lies a diaphragm plate 5 which is attached to the frame by means of diaphragms 6 and screws 7. On top of the diaphra~m plate the pressure distribution block 8 is pos~tioned, which, like the diaphgram plate, has weIl-machined surfaces. The block 8 is so heavy that it provides an even and uniform transmission of the roller force to the load cell. In a recess 9 on the upper side of the block a rocker or cradle 10 is positioned, the upwardly facing surface being convex. The block 8 is slightly movable in lateral direction by means of two gaps 11 between the block and two flanges 12 on the frame, the block thus sliding on the diaphragm plate 5. The gaps are covered with cover strips 13 to prevent foreign particles from falling down into the gaps.
' The lower supporting bearing housing 1~ supports on its under side two strips 15, between which there are arranged a number of adjusting plates 16 as well as a pressure plate 17 ^-with a flat under side, resting on the convex, upper side of -;he rocker.
By the arrangement with the rocker 10, turned upside down, and its convex surface, which supports the bearing housing 14 by means of the plane surface of the pressure plate 17, the load cell will be exposed to a well centered çompressive force.
Even if, during the course of the rolling, the bearing housing is subjected to a lateral movement, the comressive force on the rocker remains unchanged as far as its point of attack is con--30 cexned. Lateral ~-oXces occurring due to lateral movements of the bearing housing 14 are transm~tted by the pressure distri- :
bution bIock 8 to the frame l as soon as t~ese lateral forces : - ,' ' 1C~55726 exceed the ~ricti~nal ~orce bet~een ~he block and the diaphragm plate 5. The diaphragms 6 neutralize the residual lateral forces.
The adjusting plates 16 lie well protected below the bearing housing and, when the supporting rolls are to be exchanged, adjusting measures need be taken only in those parts which are supported by the bearing housing~
, ' : ,. . : ' ' ' : , ~: :
. .- ~.
. ..
'` ~ ' ' . ,:
,~ . .
, . .
: : ~ 5 ~ ~:
~ : ' ''`' .
Claims (6)
1. A load cell device for measuring the roller force in a rolling mill through use of a lower supporting roller bearing housing, said device comprising a frame having upwardly extending side flanges; a load cell mounted within said frame and between said side flanges; a diaphragm plate placed on top of said load cell and between said side flanges, said diaphragm plate having diaphragms extending therefrom which are mounted onto said frame by screws; a pressure distribution block mounted onto said diaphragm plate and between said side flanges such that there is a gap therebetween, said pressure distribution block having means forming a recess in the side thereof opposite the diaphragm plate; a rocker means positioned in the recess of the distribution block having a concave surface on the side opposite the side in said recess; a pressure plate arranged in contact with the convex surface of said pressure distribution block; and at least one adjusting plate mounted on the pressure plate positionable in contact with a lower supporting roller bearing housing and functional to adjust the vertical position of the roller gap.
2. The load cell device of claim 1, wherein the diaphragm plate has a well-machined flat surface on the surface in contact with the load cell and on the surface in contact with the pressure distribution block, and wherein the pressure dis-tribution block has a well-machined flat surface in contact with the diaphragm plate.
3. The load cell device of claim 2, wherein the pres-sure distribution block is in frictional contact with the dia-phgram plate such that lateral movement therebetween under the influence of small lateral forces is prevented.
4. The load cell device of claim 3, wherein the surface of pressure plate in contact with the convex surface of the pressure distribution block is flat.
5. The load cell device of claim 1, wherein said load cell is mounted in said frame by means of a pressure plate positioned between a bottom portion of said load cell and a bottom portion of said frame and lateral support means positioned between side portions of said load cell and side portions of said frame.
6. The load cell device of claim 1, wherein said at least one adjusting plate is mounted between two strips.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7502686A SE404762B (en) | 1975-03-11 | 1975-03-11 | LOAD CELL CONSTRUCTION FOR SATURATION OF ROLLING POWER IN ROLLING MILL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1055726A true CA1055726A (en) | 1979-06-05 |
Family
ID=20323916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA247,620A Expired CA1055726A (en) | 1975-03-11 | 1976-03-09 | Roller force load cell |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1055726A (en) |
| GB (1) | GB1530711A (en) |
| SE (1) | SE404762B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0342253B1 (en) * | 1988-05-18 | 1993-01-13 | Kistler Instrumente AG | Mounting of a force transducer in a measuring platform |
| WO2012069581A1 (en) * | 2010-11-25 | 2012-05-31 | Hirschmann Automation And Control Gmbh | Convex measuring axes of force transducers |
| CN106644211B (en) * | 2015-10-30 | 2022-04-22 | 中石化石油工程技术服务有限公司 | Force measuring device |
| US11851319B2 (en) | 2018-09-20 | 2023-12-26 | Stmicroelectronics S.R.L. | High-range semiconductor load sensor device |
| CN116839768B (en) * | 2023-06-30 | 2024-02-20 | 济南大学 | Miniature piezoresistive stress sensor based on tungsten diselenide |
-
1975
- 1975-03-11 SE SE7502686A patent/SE404762B/en unknown
-
1976
- 1976-03-09 CA CA247,620A patent/CA1055726A/en not_active Expired
- 1976-03-10 GB GB9496/76A patent/GB1530711A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE7502686L (en) | 1976-09-13 |
| GB1530711A (en) | 1978-11-01 |
| SE404762B (en) | 1978-10-30 |
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