CN106890857A - A kind of method of roll-force and axial force in accurate test cold pilger mill operation of rolling - Google Patents
A kind of method of roll-force and axial force in accurate test cold pilger mill operation of rolling Download PDFInfo
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- CN106890857A CN106890857A CN201710213886.1A CN201710213886A CN106890857A CN 106890857 A CN106890857 A CN 106890857A CN 201710213886 A CN201710213886 A CN 201710213886A CN 106890857 A CN106890857 A CN 106890857A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/08—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B2038/002—Measuring axial forces of rolls
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Abstract
A kind of method of roll-force and axial force in accurate test cold pilger mill operation of rolling, it uses the supporting pipe mill of Special testing device, and the plug (1) to being rolled processing carries out roll-force and axial force testing；Special testing device constitutes as follows：Axial Plug Force tests sensor (5), rolling pipe axial force testing sensor (6), roll-force and tests sensor (7), signal pickup assembly；Method of testing is：Plug (1) is gathered respectively in the operation of rolling with pipe (2) along the power suffered by pipe axial direction, the signal that Axial Plug Force tests sensor (5) and rolling pipe axial force testing sensor (6) is measured accordingly；The roll (3) of pipe mill is gathered simultaneously along the power suffered by pipe radial direction, and the signal of Axial Plug Force test sensor (7) is measured accordingly.Analytical calculation afterwards obtains the roll-force and axial force in the cold pilger mill operation of rolling to be measured.The present invention is workable, and technique effect is excellent, and future in engineering applications is huge.
Description
Technical field
The present invention relates to Pilger cold pilger mill and other types and model cold pilger mill roll institute in the course of the work
The applied technical field of the accurate real-time testing of the axial force suffered by roll-force and pipe and plug received, specifically provides one
The method for planting roll-force and axial force in the accurate test cold pilger mill operation of rolling.
Background technology
In the prior art, the cold reduction of tubes (Cold Rolling) is a kind of common tube forming technique, compared to drawing
Technique, the pipe finished obtained by rolling mill practice has dimensional accuracy higher, mechanical property and structural homogenity.
Pilger cold rolling (Cold Pilger Rolling) is a kind of high yield rate, and pass deformation is big, size Control essence
Degree metal cold deformation moulding process high, difficult deformable metal is widely used in by countries in the world (such as titanium alloy, zircaloy etc.)
Tube rolling, and be used to produce precision tube.The primary deformable process of Pilger rolling is by roll (including double rolls or three
Roll), the pipe between roll and the plug through pipe complete, the single rolling cycle of double roller type Pilger cold pilger mill
Schematic diagram is as Figure 1-Figure 5.In the positive stroke of single rolling cycle, top and bottom rolls with respect to pipe and plug from rear dead point to
Preceding dead-centre motion, makes pipe subtract wall and tube reducing；When roll reaches preceding dead point, pipe rotates certain angle simultaneously with plug
Degree, subsequent top and bottom rolls by preceding dead point dead-centre motion backward, complete uniformly subtracting for pipe in a cycle with respect to pipe and plug
Wall and tube reducing；When roll returns to rear dead point, pipe and plug rotate again along previous direction of rotation simultaneously, at the same pipe to
Preceding feeding, carries out the Pilger rolling of next cycle.
Roll-force is obtained by the integration of all direct stress for acting on geometry deformation area and Friction Shearing Stress, and its direction can be by
The strong balance acted on rolled piece determines.In actual production, often the vertical component made a concerted effort is called " roll-force ", closed
The horizontal component of power is referred to as " axial force ".Double roller type Pilger cold pilger mill is symmetry rolling, i.e., upper and lower two roll rotational speed phases
Deng and equal diameters, upper and lower roll-force is radially symmetrical relative to roll line.In the operation of rolling, roll-force and axial force be with
Time change, roll-force and the axial force of positive revesal are also to have any different；Meanwhile, different roll pass, rolling feed and
Under speed, roll-force also has very big difference with the distribution of axial force and variation tendency.The distribution and change of roll-force and axial force
Trend directly affects the yield rate of tube rolling, while the microscopic structure and mechanical property of finished product tubing are also influenceed, therefore, analysis
Operation of rolling roll-force is significant for the technique with axial force.At present, both at home and abroad for the cold rolling tubing of Pilger during
The method that roll-force mainly has two methods of analog simulation and actual measurement, analog simulation roll-force and axial force with the test of axial force
Tend to ripe, but shortage measured result is verified.There is no the roll-force and axial force reality published at present in the world
Survey method, therefore, the method for testing that this patent is proposed at home and abroad has frontline technology, while double roller type can be tested accurately
The variation tendency of Pilger cold pilger mill and other types and model milling train roll-force and axial force in the operation of rolling, and then
For rolling mill practice provides important theoretical direction, with engineering significance.
People are highly desirable obtain in a kind of excellent accurate test cold pilger mill operation of rolling of technique effect roll-force with
The method of axial force.
The content of the invention
It is an object of the invention to provide roll-force in a kind of excellent accurate test cold pilger mill operation of rolling of technique effect
With the method for axial force.
The invention provides a kind of method of roll-force and axial force in accurate test cold pilger mill operation of rolling, its feature
It is：It uses the supporting pipe mill of Special testing device, is initially driven to being driven by feeding trolley 4, and be arranged in pipe
In base 2 and using pipe mill roll 3 carry out roll processing plug 1 carry out roll-force and axial force testing；
The Special testing device constitutes as follows：Axial Plug Force test sensor 5 one, rolling pipe axial force testing
Sensor 6 one, roll-force test sensor 7 two pieces, 1 set of signal pickup assembly (chip containing signal acquisition, signal acquisition software
With the desktop computer of transducer calibration program)；Wherein：Signal pickup assembly respectively connected Axial Plug Force test sensor 5,
Rolling pipe axial force testing sensor 6, roll-force tests sensor 7；Axial Plug Force test sensor 5 is arranged in plug 1
On feeding trolley 4 away from rolling processing end side somewhere；It is small that rolling pipe axial force testing sensor 6 is arranged in feeding
The side at end is processed in the close rolling of car 4, and rolling pipe axial force testing sensor 6 be arranged in simultaneously pipe 2 away from rolling
The side close end at system processing end；Roll-force test sensor 7 is arranged in the external vertical of roll 3 of pipe mill in the axis of plug 1
Rolling processing district where in perpendicular；
Figure 15 is the schematic diagram that pipe mill is observed along pipe axial direction, and two pieces roll-force test sensor is illustrated in figure
Installation site.Roll-force test sensor collection pipe radial direction (vertical direction in Figure 15) pressure, when milling train is in sky
In the case of load, (be positioned over sensor according to sensor chi by the shown position that rolling force sensor is arranged on pipe mill frame
In the very little cell body for processing, and expose load-carrying surface), and be zeroed out；When milling train works, suffered by roll 3 along pipe footpath
Two pieces rolling force sensor can be transferred to the force value of (vertical direction in Figure 15), two pieces roll-force is tested measured by sensor
Force value sum is roll-force.According to the concrete model of pipe mill, the installation site and number of rolling force sensor can realize spirit
Adjustment living, the premise of adjustment is that all roll-forces test sensors measure force value sum and must be equal to the actual suffered roll-force of roll 3.
Roll-force is with the specific requirement of the method for axial force in the accurate test cold pilger mill operation of rolling：In rolling
During gather plug 1 and the power vertically suffered by (horizontal direction in Fig. 2) of pipe 2 respectively, plug axial direction is measured accordingly
Power tests the signal of sensor 5 and rolling pipe axial force testing sensor 6；
Roll-force suffered by roll 3 (i.e. survey by the roll-force in Fig. 6 in the roll-force test sensor 7 two pieces collection operation of rolling
The power of the vertical direction that examination sensor 7 is measured)；
Include the signal acquisition software function module and sensor force value matched with sensor in signal pickup assembly
Demarcating module；Sensor 5, rolling pipe axial force testing sensor 6, roll-force test sensor 7 are tested in Axial Plug Force
Collect enough signals and after correspondence is preserved, the mode analyzed using artificial or program is calculated to be measured cold rolling
Roll-force and axial force in the pipe machine operation of rolling.
Roll-force and the method for axial force in the accurate test cold pilger mill operation of rolling, are preferably also claimed following
Content：
Roll-force tests sensor 7 and pipe axial force testing sensor 6 is installed in a nesting relation；
Roll-force test sensor is positioned in the cell body processed according to size sensor, and specific scheme of installation is as schemed
6th, Figure 15；
Pipe axial force testing sensor one end is carried out nested by sleeve and pipe end, and the other end enters with feeding trolley
Row is nested, specific scheme of installation such as Figure 13.
Axial Plug Force is tested and installed threadably between sensor 5 and plug 1, that is, plug axial direction
Power test sensor 5 is arranged on nut type matrix and the nut type matrix is connected through a screw thread structure fixed and arranged in plug 1
On the external screw thread section of upper default section；
Roll-force is obtained by the integration of all direct stress for acting on geometry deformation area and Friction Shearing Stress, and its direction is by making
Determine for the strong balance on rolled piece.
In actual production, also the vertical component made a concerted effort is called " roll-force " sometimes, horizontal component turns into " axial force ".
In the accurate test cold pilger mill operation of rolling in the method for roll-force and axial force, tested pipe mill must be accorded with
Close GB50386-2006 milling train plant equipment project installation acceptance specifications；
Before roll-force is implemented with the method for axial force in the accurate test cold pilger mill operation of rolling, it is desirable to according to power
Sensor Design drawing (Fig. 7~14) processing roll-force and axial force testing sensor are learned, the appearance and size of sensor is not according to
It is adjusted flexibly with rolling mill type and model；The sensor for being used is resistance sensor, and finished product must meet GB/T
15478-1995 pressure sensor method for testing performance defined acceptance criterias, in addition the measuring accuracy of sensor should at least reach
The 0.001% of surveyed roll-force peak value；
Roll-force is as follows successively with the method implementation process of axial force in the accurate test cold pilger mill operation of rolling：
First, require to carry out static demarcating to roll-force and axial force testing sensor first, concrete operation step is as follows：
(1) mechanics sensor is positioned on standard mechanics machine, and sensor is connected to signal pickup assembly；
(2) the transducer calibration program in desktop computer is opened, the real time readouts of mechanics sensor are gathered；
(3) standard mechanics machine is started, the stress surface to mechanics sensor applies normal loading；
(4) by the reading of transducer calibration program setting mechanics sensor, sensor mechanics reading and standard mechanics are made
The normal loading that testing machine applies is identical；
(5) with same steps, multiple rowers that click through in the range of mechanics sensor are determined respectively, final acquisition can be accurate
Measure the mechanics sensor of magnitude of load；
2nd, afterwards, equipment installation and mechanical test are carried out on Pilger cold pilger mill, concrete operation step and phase are inside the Pass
Hold as follows：
(1) roll-force test sensor is arranged on by the T stage containing rolling force sensor standing groove according to assembling drawing
In, and appropriate raw material band is wound around mechanics sensor, sensor shakes during preventing milling train from working；On T stage
Fixed sensor data cable, to prevent that coiling occurs in roll motion process；
(2) wedge is adjusted, makes roll both sides rack and wheel gap, top and bottom rolls gap and T stage peripheral clearance phase
Deng；
(3) two sections of plugs are threadedly coupled with axial force testing sensor according to assembling drawing, and are limited using tightrope
Sensor brush set processed；
(4) pipe axial force testing sensor is arranged between pipe tail end and feeding trolley according to assembling drawing, and
With tightrope limiting sensor brush set；
(5) Axial Plug Force is tested into sensor, two pieces roll-force test sensor and pipe axial force testing sensing
Device is respectively connecting to signal pickup assembly；
(6) setting signal harvester parameter and starter, start collection and are respectively from measured by four sensors
Roll-force and axial force data；
(7) mill data is set and starts milling train；
(8) milling train is stopped；
(9) stop collection roll-force and axial force data, carry out data preservation；
Carry out the force analysis of tube rolling：
Roll-force is obtained by the integration of all direct stress for acting on geometry deformation area and Friction Shearing Stress, and its direction is by making
Determine for the strong balance on rolled piece；In actual production, often the vertical of (including normal pressure and frictional force) of making a concerted effort
Component is referred to as " roll-force ", and horizontal component turns into " axial force "；
For symmetry rolling, upper and lower two roll rotational speeds are equal and equal diameters, its rolling schematic diagram and force analysis
As shown in figure 18；Upper and lower roll-force is in specular relative to roll line, and the equation of equilibrium of power is:
Vertical direction：
Fv oben-Fv unten=0 (formula 1)
Horizontal direction：
Fh oben+Fh unten+(Z0-Z1)=0 (formula 2)
2Fh+(Z0-Z1)=0 (formula 3)
2Fh=Z1-Z0(formula 4)
Roll-force is relative to the inclination angle of vertical line：
The computing formula of roll-force is：
F=Ad | σ z | dA (formula 6)
More than it is various in, F is to act on making a concerted effort for geometry deformation area, and Fv is that normal pressure and frictional force are made a concerted effort in side vertically
To component, i.e. roll-force；FhIt is normal pressure and the component made a concerted effort in the horizontal direction of frictional force, i.e. axial force；Z0And Z1Respectively
It is the pulling force of the horizontal direction that pipe is subject to, σzThe stress suffered by roll unit area, A is the contact area of roll and tubing；
The operation principle of sensor is tested according to roll-force, because roll-force and axial force testing sensor are resistance-type
Sensor, relies primarily on the conversion that its internal resistance strain gage completes mechanical signal and electric signal；The work of resistance strain gage
It is to be based on strain effect as principle, i.e.,：When conductor produces mechanically deform (herein refer to stretch or compress), its resistance value also occurs
Respective change；
The resistance of metallic resistance silk is expressed with following equation：
In formula, R is resistance value, and ρ is the resistivity of the metal, and L is metallic resistance filament length degree, and S is its cross-sectional area；
Because roll-force posts foil gauge with axial force testing sensor internal along force acting on transducer direction, when sensor is received
During power, there is mechanically deform in foil gauge with sensor, and this deflection correspond to the change of resistance value, it is thus possible to electricity
The form of signal value is exported to signal pickup assembly；
Value of electrical signals by the output corresponding with sensor of standard force value suffered by sensor on mechanics machine is carried out one by one
Matching, i.e., can complete conversion of the value of electrical signals to mechanics reading value；
After roll-force reading value of the test sensor with axial force transducer is obtained, carried out at data using following methods
Reason：Data output format be text document (.txt), in file content each row with constantly for starting, when being then followed successively by this
Inscribe measured core bar axial force, roll-force 1, roll-force 2 and pipe axial force, between each result with some spaces every
Open；Example is as follows：
When carrying out data processing, txt file directly is opened using corresponding text edit software, generate list data, example
It is as follows：
| 2016-6-20 afternoons 03:29:44.001 | -0.085 | 0.051 | -0.033 | -0.014 |
| 2016-6-20 afternoons 03:29:44.002 | -0.085 | 0.051 | -0.033 | -0.014 |
| 2016-6-20 afternoons 03:29:44.003 | -0.085 | 0.051 | -0.033 | -0.014 |
| 2016-6-20 afternoons 03:29:44.004 | -0.085 | 0.051 | -0.033 | -0.014 |
Then with time scale as independent variable, core bar axial force, roll-force 1, roll-force 2 and pipe axial force are because becoming
Amount draws curve, can access the spectrogram that roll-force is changed over time with axial force.
Roll-force can realize adjustment with the maximum dynamometry range of pipe axial force testing sensor 6, to meet different pipes
Testing requirement under base material, different milling train models and different rolling parameters；Axial Plug Force test sensor 5 one above
Part, rolling pipe axial force testing sensor 6 one, roll-force test sensor 7 two pieces totally 4 sensors operationally all with
Signal pickup assembly is connected, and the signal acquisition software function module and biography matched with sensor are included in signal pickup assembly
Sensor force value demarcating module；
The frequency of signal acquisition software collection data can realize adjustment, it is per second can gather data points maximum be
10000.
The covering device can simultaneously measure certain model pipe mill operationally axial force suffered by roll-force, pipe and plug institute
By axial force, up to thousands of times per second, test result has accuracy for force value tests precision and signal acquisition frequency.
Installation site such as Fig. 6 institute of each mechanics sensor of design and use of the present invention on Pilger cold pilger mill
Show.Wherein, roll-force test sensor and pipe axial force testing sensor are installed in a nesting relation, Axial Plug Force
Installed threadably between test sensor and plug.
The present invention is used for real-time testing Pilger cold pilger mill and other types and model cold pilger mill in the course of work
In, the roll-force suffered by roll, and pipe and the axial force suffered by plug.It is accurate with the test of axial force to ensure roll-force
Errorless, tested pipe mill has to comply with GB50386-2006 milling train plant equipment project installation acceptance specifications.
The present invention introduces roll-force, axle suffered by pipe in the real time measure operation of rolling by taking Pilger double roller pipe mill as an example
To the package unit and method of testing of axial force suffered by power and plug, while the method is applied to other types (including non-skin
Erg pipe mill) and model pipe mill.The present invention includes that roll-force tests sensor two pieces, Axial Plug Force test sensor one
Part, pipe axial force testing sensor one and signal pickup assembly it is a set of (chip containing signal acquisition, signal acquisition software and
The desktop computer of transducer calibration program).The covering device can simultaneously measure the model milling train operationally suffered by roll-force, pipe
Axial force suffered by axial force and plug, force value tests precision and signal acquisition frequency are up to thousands of times per second, test result tool
There is accuracy.
Experiment is successful in operating mode first, can accurately determine the rolling of Pilger double roller cold pilger mill for the country for the present invention
The distribution situation and the package unit and method of testing of variation tendency of power and axial force, while the method is also applied for due to it
Its type (including non-pilgrim rolling machine) and model pipe mill.
Roll-force is directly connected to the deformation of Pilger operation of rolling blank, therefore roll-force and axial force with axial force
Test result can instruct all multi-parameters in Pilger rolling mill practice, such as deflection, feed, speed, roll pass with
And roll seam size etc., the raising of prediction, yield rate simultaneously for rolling defect has Engineering Guidance to act on.Technical staff
On the premise of roll-force in measuring the operation of rolling and axial force, Reasonable adjustment can be carried out to the parameter of rolling mill practice, for example
Adjustment billet production feed, rolling speed, roll pass and roll seam size etc., and then the pole in reasonable controlled range
The big production efficiency for improving rolling mill practice.For example, if actual measurement roll-force is less than normal compared with theoretical value with axial force, engineers and technicians are
Billet production feed, rolling speed or every time deflection can be properly increased, and then improves the production efficiency for rolling, while
Reduces cost, creates the wealth.
The present invention is workable, and technique effect is excellent；This bright proposed roll-force is installed with axial-force testing device
It is convenient, one can operate on it after the completion of debugging；The data output format of test result is text document, can be straight
Being connected in the softwares such as Excel or Origin carries out data processing；Meanwhile, method of testing proposed by the present invention applies also for other classes
Type (including non-pilgrim rolling machine) and model pipe mill, future in engineering applications are huge.
Brief description of the drawings
Below in conjunction with the accompanying drawings and implementation method the present invention is further detailed explanation：
Fig. 1 is one of the single rolling cycle schematic diagram of double roller type Pilger cold pilger mill (positive stroke incipient stage)；
Fig. 2 is two (the positive stroke interstages) of the single rolling cycle schematic diagram of double roller type Pilger cold pilger mill；
Fig. 3 is three (positive stroke ending phases) of the single rolling cycle schematic diagram of double roller type Pilger cold pilger mill；
Fig. 4 is four (the revesal interstages) of the single rolling cycle schematic diagram of double roller type Pilger cold pilger mill；
Fig. 5 is five (revesal ending phases) of the single rolling cycle schematic diagram of double roller type Pilger cold pilger mill；
Fig. 6 is roll-force and axial force testing sensor mounting location schematic diagram；
Fig. 7 is one of roll-force test sensor processing drawing：Solid is with reference to figure；
Fig. 8 is the two of roll-force test sensor processing drawing：Front view
Fig. 9 is three left views that roll-force test sensor processes drawing；
Figure 10 is one of Axial Plug Force test sensor processing drawing；
Figure 11 is the two of Axial Plug Force test sensor processing drawing；
Figure 12 is one of pipe axial force testing sensor processing drawing：Solid is with reference to figure；
Figure 13 is the two of pipe axial force testing sensor processing drawing：Front view；(figure is updated)
Figure 14 is the three of pipe axial force testing sensor processing drawing：Left view；
Figure 15 is that roll-force tests sensor mounting location schematic diagram；
Figure 16 is that Zr-4 alloys stable rolling process roll-force changes over time spectrogram with axial force；
Figure 17 is that roll-force changes over time spectrogram with axial force in the Zr-4 alloy stable rolling process monocycles；
Figure 18 is symmetry rolling schematic diagram and force analysis figure.
Specific embodiment
Embodiment 1
A kind of method of roll-force and axial force in accurate test cold pilger mill operation of rolling, it uses Special testing device
Supporting pipe mill, is initially driven to being driven by feeding trolley 4, and is arranged in pipe 2 and is used the roll 3 of pipe mill
The plug 1 for roll processing carries out roll-force and axial force testing；
The Special testing device constitutes as follows：Axial Plug Force test sensor 5 one, rolling pipe axial force testing
Sensor 6 one, roll-force test sensor 7 two pieces, 1 set of signal pickup assembly (chip containing signal acquisition, signal acquisition software
With the desktop computer of transducer calibration program)；Wherein：Signal pickup assembly respectively connected Axial Plug Force test sensor 5,
Rolling pipe axial force testing sensor 6, roll-force tests sensor 7；Axial Plug Force test sensor 5 is arranged in plug 1
On feeding trolley 4 away from rolling processing end side somewhere；It is small that rolling pipe axial force testing sensor 6 is arranged in feeding
The side at end is processed in the close rolling of car 4, and rolling pipe axial force testing sensor 6 be arranged in simultaneously pipe 2 away from rolling
The side close end at system processing end；Roll-force test sensor 7 is arranged in the external vertical of roll 3 of pipe mill in the axis of plug 1
Rolling processing district where in perpendicular；
Figure 15 is the schematic diagram that pipe mill is observed along pipe axial direction, and two pieces roll-force test sensor is illustrated in figure
Installation site.Roll-force test sensor collection pipe radial direction (vertical direction in Figure 15) pressure, when milling train is in sky
In the case of load, (be positioned over sensor according to sensor chi by the shown position that rolling force sensor is arranged on pipe mill frame
In the very little cell body for processing, and expose load-carrying surface), and be zeroed out；When milling train works, suffered by roll 3 along pipe footpath
Two pieces rolling force sensor can be transferred to the force value of (vertical direction in Figure 15), two pieces roll-force is tested measured by sensor
Force value sum is roll-force.According to the concrete model of pipe mill, the installation site and number of rolling force sensor can realize spirit
Adjustment living, the premise of adjustment is that all roll-forces test sensors measure force value sum and must be equal to the actual suffered roll-force of roll 3.
Roll-force is with the specific requirement of the method for axial force in the accurate test cold pilger mill operation of rolling：In rolling
During gather plug 1 and the power vertically suffered by (horizontal direction in Fig. 2) of pipe 2 respectively, plug axial direction is measured accordingly
Power tests the signal of sensor 5 and rolling pipe axial force testing sensor 6；
Roll-force suffered by roll 3 in the roll-force test sensor 7 two pieces collection operation of rolling；That is the roll-force in Fig. 6 is surveyed
The power of the vertical direction that examination sensor 7 is measured；
Include the signal acquisition software function module and sensor force value matched with sensor in signal pickup assembly
Demarcating module；Sensor 5, rolling pipe axial force testing sensor 6, roll-force test sensor 7 are tested in Axial Plug Force
Collect enough signals and after correspondence is preserved, the mode analyzed using artificial or program is calculated to be measured cold rolling
Roll-force and axial force in the pipe machine operation of rolling.
Roll-force and the method for axial force in the accurate test cold pilger mill operation of rolling, also meet following requirements：
Roll-force tests sensor 7 and pipe axial force testing sensor 6 is installed in a nesting relation；
Roll-force test sensor is positioned in the cell body processed according to size sensor, and specific scheme of installation is as schemed
15；
Pipe axial force testing sensor one end is carried out nested by sleeve and pipe end, and the other end enters with feeding trolley
Row is nested, specific scheme of installation such as Figure 13.
Axial Plug Force is tested and installed threadably between sensor 5 and plug 1, that is, plug axial direction
Power test sensor 5 is arranged on nut type matrix and the nut type matrix is connected through a screw thread structure fixed and arranged in plug 1
On the external screw thread section of upper default section；
Roll-force is obtained by the integration of all direct stress for acting on geometry deformation area and Friction Shearing Stress, and its direction is by making
Determine for the strong balance on rolled piece.
In actual production, also the vertical component made a concerted effort is called " roll-force " sometimes, horizontal component turns into " axial force ".
In the accurate test cold pilger mill operation of rolling in the method for roll-force and axial force, tested pipe mill must be accorded with
Close GB50386-2006 milling train plant equipment project installation acceptance specifications；
Before roll-force is implemented with the method for axial force in the accurate test cold pilger mill operation of rolling, it is desirable to according to power
Sensor Design drawing (Fig. 7~14) processing roll-force and axial force testing sensor are learned, the appearance and size of sensor is not according to
It is adjusted flexibly with rolling mill type and model；The sensor for being used is resistance sensor, and finished product must meet GB/T
15478-1995 pressure sensor method for testing performance defined acceptance criterias, in addition the measuring accuracy of sensor should at least reach
The 0.001% of surveyed roll-force peak value；
Roll-force is as follows successively with the method implementation process of axial force in the accurate test cold pilger mill operation of rolling：
First, require to carry out static demarcating to roll-force and axial force testing sensor first, concrete operation step is as follows：
(1) mechanics sensor is positioned on standard mechanics machine, and sensor is connected to signal pickup assembly；
(2) the transducer calibration program in desktop computer is opened, the real time readouts of mechanics sensor are gathered；
(3) standard mechanics machine is started, the stress surface to mechanics sensor applies normal loading；
(4) by the reading of transducer calibration program setting mechanics sensor, sensor mechanics reading and standard mechanics are made
The normal loading that testing machine applies is identical；
(5) with same steps, multiple rowers that click through in the range of mechanics sensor are determined respectively, final acquisition can be accurate
Measure the mechanics sensor of magnitude of load；
2nd, afterwards, equipment installation and mechanical test are carried out on Pilger cold pilger mill, concrete operation step and phase are inside the Pass
Hold as follows：
(1) roll-force test sensor is arranged on by the T stage containing rolling force sensor standing groove according to assembling drawing
In, and appropriate raw material band is wound around mechanics sensor, sensor shakes during preventing milling train from working；On T stage
Fixed sensor data cable, to prevent that coiling occurs in roll motion process；
(2) wedge is adjusted, makes roll both sides rack and wheel gap, top and bottom rolls gap and T stage peripheral clearance phase
Deng；
(3) two sections of plugs are threadedly coupled with axial force testing sensor according to assembling drawing, and are limited using tightrope
Sensor brush set processed；
(4) pipe axial force testing sensor is arranged between pipe tail end and feeding trolley according to assembling drawing, and
With tightrope limiting sensor brush set；
(5) Axial Plug Force is tested into sensor, two pieces roll-force test sensor and pipe axial force testing sensing
Device is respectively connecting to signal pickup assembly；
(6) setting signal harvester parameter and starter, start collection and are respectively from measured by four sensors
Roll-force and axial force data；
(7) mill data is set and starts milling train；
(8) milling train is stopped；
(9) stop collection roll-force and axial force data, carry out data preservation；
Carry out the force analysis of tube rolling：
Roll-force is obtained by the integration of all direct stress for acting on geometry deformation area and Friction Shearing Stress, and its direction is by making
Determine for the strong balance on rolled piece；In actual production, often the vertical of (including normal pressure and frictional force) of making a concerted effort
Component is referred to as " roll-force ", and horizontal component turns into " axial force "；
For symmetry rolling, upper and lower two roll rotational speeds are equal and equal diameters, its rolling schematic diagram and force analysis
As shown in figure 18；Upper and lower roll-force is in specular relative to roll line, and the equation of equilibrium of power is:
Vertical direction：
Fv oben-Fv unten=0 (formula 1)
Horizontal direction：
Fh oben+Fh unten+(Z0-Z1)=0 (formula 2)
2Fh+(Z0-Z1)=0 (formula 3)
2Fh=Z1-Z0(formula 4)
Roll-force is relative to the inclination angle of vertical line：
The computing formula of roll-force is：
F=Ad | σ z | dA (formula 6)
More than it is various in, F is to act on making a concerted effort for geometry deformation area, and Fv is that normal pressure and frictional force are made a concerted effort in side vertically
To component, i.e. roll-force；FhIt is normal pressure and the component made a concerted effort in the horizontal direction of frictional force, i.e. axial force；Z0And Z1Respectively
It is the pulling force of the horizontal direction that pipe is subject to, σzThe stress suffered by roll unit area, A is the contact area of roll and tubing；
The operation principle of sensor is tested according to roll-force, because roll-force and axial force testing sensor are resistance-type
Sensor, relies primarily on the conversion that its internal resistance strain gage completes mechanical signal and electric signal；The work of resistance strain gage
It is to be based on strain effect as principle, i.e.,：When conductor produces mechanically deform (herein refer to stretch or compress), its resistance value also occurs
Respective change；
The resistance of metallic resistance silk is expressed with following equation：
In formula, R is resistance value, and ρ is the resistivity of the metal, and L is metallic resistance filament length degree, and S is its cross-sectional area；
Because roll-force posts foil gauge with axial force testing sensor internal along force acting on transducer direction, when sensor is received
During power, there is mechanically deform in foil gauge with sensor, and this deflection correspond to the change of resistance value, it is thus possible to electricity
The form of signal value is exported to signal pickup assembly；
Value of electrical signals by the output corresponding with sensor of standard force value suffered by sensor on mechanics machine is carried out one by one
Matching, i.e., can complete conversion of the value of electrical signals to mechanics reading value；
After roll-force reading value of the test sensor with axial force transducer is obtained, carried out at data using following methods
Reason：Data output format be text document (.txt), in file content each row with constantly for starting, when being then followed successively by this
Inscribe measured core bar axial force, roll-force 1, roll-force 2 and pipe axial force, between each result with some spaces every
Open；Example is as follows：
When carrying out data processing, txt file directly is opened using corresponding text edit software, generate list data, example
It is as follows：
| 2016-6-20 afternoons 03:29:44.001 | -0.085 | 0.051 | -0.033 | -0.014 |
| 2016-6-20 afternoons 03:29:44.002 | -0.085 | 0.051 | -0.033 | -0.014 |
| 2016-6-20 afternoons 03:29:44.003 | -0.085 | 0.051 | -0.033 | -0.014 |
| 2016-6-20 afternoons 03:29:44.004 | -0.085 | 0.051 | -0.033 | -0.014 |
Then with time scale as independent variable, core bar axial force, roll-force 1, roll-force 2 and pipe axial force are because becoming
Amount draws curve, can access the spectrogram that roll-force is changed over time with axial force.
Roll-force can realize adjustment with the maximum dynamometry range of pipe axial force testing sensor 6, to meet different pipes
Testing requirement under base material, different milling train models and different rolling parameters；Axial Plug Force test sensor 5 one above
Part, rolling pipe axial force testing sensor 6 one, roll-force test sensor 7 two pieces totally 4 sensors operationally all with
Signal pickup assembly is connected, and the signal acquisition software function module and biography matched with sensor are included in signal pickup assembly
Sensor force value demarcating module；
The frequency of signal acquisition software collection data can realize adjustment, it is per second can gather data points maximum be
10000.
The covering device can simultaneously measure certain model pipe mill operationally axial force suffered by roll-force, pipe and plug institute
By axial force, up to thousands of times per second, test result has accuracy for force value tests precision and signal acquisition frequency.
Installation site such as Fig. 6 institute of each mechanics sensor of the present embodiment design and use on Pilger cold pilger mill
Show.Wherein, roll-force test sensor and pipe axial force testing sensor are installed in a nesting relation, Axial Plug Force
Installed threadably between test sensor and plug.
The present embodiment is used for real-time testing Pilger cold pilger mill and other types and model cold pilger mill worked
Axial force suffered by Cheng Zhong, the roll-force suffered by roll, and pipe and plug.To ensure the test essence of roll-force and axial force
Really errorless, tested pipe mill has to comply with GB50386-2006 milling train plant equipment project installation acceptance specifications.
The present embodiment introduces roll-force in the real time measure operation of rolling, suffered by pipe by taking Pilger double roller pipe mill as an example
The package unit and method of testing of axial force suffered by axial force and plug, at the same the method to be applied to other types (including non-
Pilgrim rolling machine) and model pipe mill.The present embodiment includes that roll-force tests sensor two pieces, Axial Plug Force test sensing
A set of (chip containing signal acquisition, signal acquisition are soft for device one, pipe axial force testing sensor one and signal pickup assembly
The desktop computer of part and transducer calibration program).The covering device can simultaneously measure the model milling train operationally roll-force, pipe
Axial force suffered by suffered axial force and plug, force value tests precision and signal acquisition frequency are up to thousands of times per second, test knot
Fruit has accuracy.
The present embodiment for it is domestic tested in operating mode first successfully, can accurately determine Pilger double roller cold pilger mill and roll
The distribution situation and the package unit and method of testing of variation tendency of power processed and axial force, at the same the method be also applied for due to
Other types (including non-pilgrim rolling machine) and model pipe mill.
Roll-force is directly connected to the deformation of Pilger operation of rolling blank, therefore roll-force and axial force with axial force
Test result can instruct all multi-parameters in Pilger rolling mill practice, such as deflection, feed, speed, roll pass with
And roll seam size etc., the raising of prediction, yield rate simultaneously for rolling defect has Engineering Guidance to act on.Technical staff
On the premise of roll-force in measuring the operation of rolling and axial force, Reasonable adjustment can be carried out to the parameter of rolling mill practice, for example
Adjustment billet production feed, rolling speed, roll pass and roll seam size etc., and then the pole in reasonable controlled range
The big production efficiency for improving rolling mill practice.For example, if actual measurement roll-force is less than normal compared with theoretical value with axial force, engineers and technicians are
Billet production feed, rolling speed or every time deflection can be properly increased, and then improves the production efficiency for rolling, while
Reduces cost, creates the wealth.
The present embodiment is workable, and technique effect is excellent；The roll-force that the present embodiment is proposed is filled with axial force testing
Install convenient is put, one can operate on it after the completion of debugging；The data output format of test result is text document,
Data processing can be directly carried out in the softwares such as Excel or Origin；Meanwhile, the method for testing that the present embodiment is proposed is applied also for
Other types (including non-pilgrim rolling machine) and model pipe mill, future in engineering applications are huge.
Embodiment 2
In the technical foundation of embodiment 1, extension carries out specific Zr-4 alloy pipes in certain model double roller to the present embodiment
The test of operation of rolling roll-force and axial force on type Pilger cold pilger mill：
Zr-4 alloys rely on its low neutron absorption cross-section, good mechanical property and corrosion resistance, are used for nuclear reaction
Heap cladding tube material.Domestic certain Zr-4 alloy pipe production line has used certain model double roller type Pilger cold pilger mill, is situated between below
In certain rolling pass production process that continues, the method proposed by the patent carries out the result of roll-force and axial force testing.
It is 40mm that Zr-4 alloys roll preceding initial pipe external diameter, and wall thickness is 12.5mm, rolls rear finished product tube outer diameter for 31mm, wall
Thickness is 9mm.The speed of passage Pilger rolling is 60 cycles/min, and pipe feed is 3mm.Tested from roll-force and sensed
The range of device is 0~150kN, and the range that pipe axial force and Axial Plug Force test sensor is 0~50kN, mechanical test
The measuring accuracy of sensor is 0.001kN.To distinguish roll-force test sensor, pipe axial force testing sensor according to Fig. 2
And Axial Plug Force test sensor is attached to the relevant position of milling train, and sensor is connected to signal pickup assembly, first
Enabling signal acquisition software and Pilger pipe mill afterwards, start collection Zr-4 alloys in the operation of rolling under the Pilger rolling parameter
Roll-force, pipe axial force and Axial Plug Force.Figure 16 is Zr-4 alloys in 60 cycles/min speeds, the rolling of 3mm feeds
When being rolled under parameter, Pilger stable rolling process roll-force changes over time spectrogram with axial force, and Figure 17 is the rolling
Roll-force changes over time spectrogram with axial force in the Pilger stable rolling process single rolling cycle under parameter.
Claims (5)
1. in a kind of accurate test cold pilger mill operation of rolling roll-force and axial force method, it is characterised in that：It uses special
With the supporting pipe mill of test device, initially driven to being driven by feeding trolley (4), and be arranged in pipe (2) and make
The plug (1) for carrying out rolling processing with the roll (3) of pipe mill carries out roll-force and axial force testing；
The Special testing device constitutes as follows：Axial Plug Force tests sensor (5), rolling pipe axial force testing sensor
(6), roll-force tests sensor (7), signal pickup assembly；Wherein：Signal pickup assembly respectively connected Axial Plug Force survey
Examination sensor (5), rolling pipe axial force testing sensor (6), roll-force test sensor (7)；Axial Plug Force test is passed
Sensor (5) is arranged in the side somewhere away from rolling processing end of the feeding trolley (4) on plug (1)；Rolling pipe axial force
Test sensor (6) is arranged in the side at the close rolling processing end of feeding trolley (4), and rolling pipe axial force testing is sensed
Device (6) is while be arranged in the side close end away from rolling processing end of pipe (2)；Roll-force is tested sensor (7) and is arranged in
Roll (3) external vertical of pipe mill is in perpendicular where the rolling processing district of plug (1) axis；
Roll-force is with the specific requirement of the method for axial force in the accurate test cold pilger mill operation of rolling：In the operation of rolling
It is middle respectively collection plug (1) with pipe (2) power suffered vertically, measure accordingly Axial Plug Force test sensor (5) and
The signal of rolling pipe axial force testing sensor (6)；
Roll-force tests roll-force suffered by roll (3) in sensor (7) the collection operation of rolling；
Include the signal acquisition software function module and the demarcation of sensor force value matched with sensor in signal pickup assembly
Module；Sensor (5), rolling pipe axial force testing sensor (6), roll-force test sensor are tested in Axial Plug Force
(7) collect after enough signals and correspondence preservation, the mode analyzed using artificial or program is calculated to be measured
Roll-force and axial force in the cold pilger mill operation of rolling.
2. according to the method for roll-force and axial force in the accurate test cold pilger mill operation of rolling described in claim 1, its feature
It is：
Roll-force tests sensor (7) and pipe axial force testing sensor (6) is installed in a nesting relation；
Axial Plug Force is tested and installed threadably between sensor (5) and plug (1), that is, plug axial direction
Power test sensor (5) is arranged on nut type matrix and the nut type matrix is connected through a screw thread structure fixed and arranged in plug
(1) preset on the external screw thread section of section on；
Roll-force is obtained by the integration of all direct stress for acting on geometry deformation area and Friction Shearing Stress, and its direction is by acting on
Strong balance on rolled piece determines.
3., according to the method for roll-force and axial force in the accurate test cold pilger mill operation of rolling described in claim 1 or 2, it is special
Levy and be：In the accurate test cold pilger mill operation of rolling in the method for roll-force and axial force, tested pipe mill must be accorded with
Close GB50386-2006 milling train plant equipment project installation acceptance specifications；
Before roll-force is implemented with the method for axial force in the accurate test cold pilger mill operation of rolling, it is desirable to passed according to mechanics
Sensor design drawing processes roll-force and axial force testing sensor, and the appearance and size of sensor is according to different rolling mill types and type
Number it is adjusted flexibly；The sensor for being used is resistance sensor, and finished product must meet GB/T 15478-1995 pressure sensings
Device method for testing performance defined acceptance criteria, in addition the measuring accuracy of sensor should at least reach surveyed roll-force peak value
0.001%；
Roll-force is as follows successively with the method implementation process of axial force in the accurate test cold pilger mill operation of rolling：
First, require to carry out static demarcating to roll-force and axial force testing sensor first, concrete operation step is as follows：
(1) mechanics sensor is positioned on standard mechanics machine, and sensor is connected to signal pickup assembly；
(2) the transducer calibration program in desktop computer is opened, the real time readouts of mechanics sensor are gathered；
(3) standard mechanics machine is started, the stress surface to mechanics sensor applies normal loading；
(4) by the reading of transducer calibration program setting mechanics sensor, sensor mechanics reading and standard mechanical test are made
The normal loading that machine applies is identical；
(5) with same steps, multiple rowers that click through in the range of mechanics sensor are determined respectively, final acquisition can accurately measure
The mechanics sensor of magnitude of load；
2nd, afterwards, equipment installation and mechanical test are carried out on Pilger cold pilger mill, concrete operation step and related content are such as
Under：
(1) roll-force test sensor is arranged in the T stage containing rolling force sensor standing groove according to assembling drawing, and
Appropriate raw material band is wound around mechanics sensor, sensor shakes during preventing milling train from working；It is fixed on T stage to pass
Sensor data wire, to prevent that coiling occurs in roll motion process；
(2) wedge is adjusted, makes roll both sides rack and wheel gap, top and bottom rolls gap and T stage peripheral clearance equal；
(3) two sections of plugs are threadedly coupled with axial force testing sensor according to assembling drawing, and biography is limited using tightrope
Sensor brush set；
(4) pipe axial force testing sensor is arranged between pipe tail end and feeding trolley according to assembling drawing, and with soft
Rope limiting sensor brush set；
(5) Axial Plug Force is tested into sensor, two pieces roll-force test sensor and pipe axial force testing sensor point
Signal pickup assembly is not connected to it；
(6) setting signal harvester parameter and starter, start to gather and are respectively from rolling measured by four sensors
Power processed and axial force data；
(7) mill data is set and starts milling train；
(8) milling train is stopped；
(9) stop collection roll-force and axial force data, carry out data preservation；
Carry out the force analysis of tube rolling：
Roll-force is obtained by the integration of all direct stress for acting on geometry deformation area and Friction Shearing Stress, and its direction is by acting on
Strong balance on rolled piece determines；
For symmetry rolling, upper and lower two roll rotational speeds are equal and equal diameters；Upper and lower roll-force is in mirror relative to roll line
As symmetrically, the equation of equilibrium of power is：
Vertical direction：
Fv oben-Fv unten=0 (formula 1)
Horizontal direction：
Fh oben+Fh unten+(Z0-Z1)=0 (formula 2)
2Fh+(Z0-Z1)=0 (formula 3)
2Fh=Z1-Z0(formula 4)
Roll-force is relative to the inclination angle of vertical line：
The computing formula of roll-force is：
F=Ad | σ z | dA (formula 6)
More than it is various in, F is to act on making a concerted effort for geometry deformation area, and Fv is that normal pressure and frictional force are made a concerted effort in vertical direction
Component, i.e. roll-force；FhIt is normal pressure and the component made a concerted effort in the horizontal direction of frictional force, i.e. axial force；Z0And Z1Respectively manage
The pulling force of the horizontal direction that base is subject to, σzThe stress suffered by roll unit area, A is the contact area of roll and tubing；
The operation principle of sensor is tested according to roll-force, because roll-force and axial force testing sensor are resistance-type sensing
Device, relies on the conversion that its internal resistance strain gage completes mechanical signal and electric signal；The operation principle of resistance strain gage is
Based on strain effect, i.e.,：When conductor produces mechanically deform, also there is respective change in its resistance value；
The resistance of metallic resistance silk is expressed with following equation：
In formula, R is resistance value, and ρ is the resistivity of the metal, and L is metallic resistance filament length degree, and S is its cross-sectional area；
Because roll-force posts foil gauge with axial force testing sensor internal along force acting on transducer direction, work as force acting on transducer
When, there is mechanically deform in foil gauge, this deflection correspond to the change of resistance value, it is thus possible to telecommunications with sensor
The form of number value is exported to signal pickup assembly；
Value of electrical signals by the output corresponding with sensor of standard force value suffered by sensor on mechanics machine is matched one by one,
Conversion of the value of electrical signals to mechanics reading value can be completed；
4. according to the method for roll-force and axial force in the accurate test cold pilger mill operation of rolling described in claim 3, its feature
It is：
After roll-force reading value of the test sensor with axial force transducer is obtained, data processing is carried out using following methods：
Data output format is TXT text documents, and each row inscribes institute to be constantly starting in file content when being then followed successively by this
Core bar axial force, roll-force 1, roll-force 2 and pipe axial force are measured, is separated with some spaces between each result.
When carrying out data processing, TXT files directly are opened using corresponding text edit software, generate list data；Then with when
Between scale be independent variable, core bar axial force, roll-force 1, roll-force 2 and pipe axial force be dependent variable draw curve, can
Access the spectrogram that roll-force is changed over time with axial force.
5. according to the method for roll-force and axial force in the accurate test cold pilger mill operation of rolling described in claim 3, its feature
It is：
Roll-force can realize adjustment with the maximum dynamometry range of pipe axial force testing sensor (6), to meet different pipes
Testing requirement under material, different milling train models and different rolling parameters；Axial Plug Force test sensor (5) 1 above
Totally 4 sensors are operationally all for part, rolling pipe axial force testing sensor (6) 1, roll-force test sensor (7) 2
Be connected with signal pickup assembly, include in signal pickup assembly the signal acquisition software function module that matches with sensor and
Sensor force value demarcating module；
The frequency of signal acquisition software collection data can realize adjustment, and the data points maximum that can be gathered per second is 10,000
It is individual.
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Cited By (3)
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| JP2021504144A (en) * | 2017-11-27 | 2021-02-15 | エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Roll stand |
| CN113617844A (en) * | 2021-08-13 | 2021-11-09 | 成都通乐机械有限公司 | Steel pipe roller and steel pipe machining method |
| CN113916279A (en) * | 2021-08-30 | 2022-01-11 | 北京科技大学 | Device for measuring axial rolling force and rotating speed of rolled piece in cross wedge rolling forming process |
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Inventor after: Li Geping Inventor after: Han Fuzhou Inventor after: Liu Chengze Inventor after: Yuan Gaihuan Inventor after: Chu Linhua Inventor after: Luo Qianqian Inventor after: Wang Lian Inventor after: Gao Bo Inventor after: Gu Hengfei Inventor after: Yuan Fusen Inventor before: Li Geping Inventor before: Liu Chengze Inventor before: Yuan Gaihuan Inventor before: Chu Linhua Inventor before: Luo Qianqian Inventor before: Wang Lian Inventor before: Gao Bo Inventor before: Gu Hengfei Inventor before: Han Fuzhou |
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