The example of controller configuration by MHPC-M
Mill Hydraulic Cylinder Controller
Principle
In order to strip to setting thickness with the roll of a rolling mill, it is equipment which operates the spool position of a servo valve and controls the position of a cylinder.
Feature
- High-speed control with exclusive application. (Sampling time:1ms)
- A high precision and environment proof position sensor is used.
- There are various compensation functions based on the past know-how.
- Mill modulus compensation
- Servo flow gain compensation
| Line conditions etc | Sensor,Actuator |
|---|---|
| Strip Temp : 400～1100℃ Strip Thick : 1.0～12.0mm Strip Width : 900～1550mm Line Speed : max15m/s There is mach steam, Cooling-water scattering |
Linear Sensor×2 Load Cell×2 Cylinder×2 Servo valve×2 |
Down Coiler Hydraulic Cylinder Controller
Principle
In the equipment which rolls round strip, it is equipment which carries out quick opening of the roll at the time of strip top end passage, decreases a top mark, and raises product quality.
Feature
- Accurate unit roll gap setting by means of linear sensor
- Advanced Q.O.C. (Quick Opening Control) system
- Accurate strip top end tracking Small impact load at coiling first period
| Line conditions etc | Sensor,Actuator |
|---|---|
| Strip Temp : 400～600℃ Strip Thick : 1.2～20.0mm Strip Width : 500～2180mm Coil Diameter : 915～2600mm Line Speed : max15m/s There is mach steam, Cooling-water scattering |
Linear Sensor×4 PT×8 Laser Sensor×2 Cylinder×4 Servo Valve×4 |
Online Roll Profiler
Principle
It is equipment which forces on roll the grindstone installed in the rolling mill, makes it move in the direction of a roll axis, and grinds the roll surface. There is an effect of the improvement in the productivity by reduction of the number of roll exchange and the improved quality by roll surface roughness removal.
Feature
- The angle of a grindstone is adjusted and the variation in grinding ability is prevented.
- Force control of the whetstone according to roll speed is performed, and the amount of grinding is kept constant.
- The grinding pattern
- Complete grinding : Remove the surface roughness of Roll.
- Partial grinding : Remove the level difference by rolling.
| Line conditions etc | Sensor,Actuator |
|---|---|
| WR Diameter : 575～680mm Line Speed : 350～1600mpm Heat and high humidity Cooling-water scattering |
Servo Motor×14 Encorder×12 Absocoder ×2 Load Cell×4 |
Roll Eccentricity Control
Principle
If eccentricity is in Roll, change of rolling force will occur according to roll rotation, and it will become change of strip thickness. This equipment samples the load change according to a rotation angle with the PLG attached to BUR, and outputs the amount of roll eccentric compensation to the hydraulic cylinder controller.
Feature
- The phase delay of a servo system is rectified on real time, and the line speed change under rolling is also followed at high speed.
- The value change by heat modification etc. is also followed on real time.
- It is only PLG which is installed in the local side, and an equipment addition is also easy.
| Line conditions etc | Sensor,Actuator |
|---|---|
| BUR Diameter : 1450～1655mm Line Speed : max 1680mpm Heat and high humidity,Cooling-water scattering |
Absocoder (64PLS/Rotation) |
Strip Stabilizer
Principle
Strip Stabilizer system using electromagnet can correct a strip wrap, adjust a pass line position and reduce a strip vibration Flat strip shape at air knife leads to : Uniform coating-Less consumption of molten zinc.
Feature
- Force of magnet : 10.5kgf/p'ce
- Amplitude of vibration : < 30% (Freq 0-10Hz)
- Correction of strip shape : 10mm p-p -> 2mm p-p (0.8mm t)
- Adjustment of pass line : 5-10mm
| Line conditions etc | Sensor,Actuator |
|---|---|
| Strip Thick : 0.3～3.2mm Strip Width : 610～1610mm Line Speed : 150mpm AL Coating Temp : 660℃ |
Eddy Current×8 Electromagnet×28 |
Strip Center Position Detector
Principle
It is equipment which installs a CCD camera on the side guide between stands, detects the edge of strip, and calculates the strip center position and width.
A signal is used for strip threading stability and strip tail pinching prevention and strip width control.
Feature
- Accuracy : Within±1.0mm
Accuracy is improved by triangulation, automatic correction of camera position etc. - Cycle time : Less than 5.0ms
High speed operation processing using CPU (Peintium M). - Environment-proof :
Eliminating influence of steam, water drops, etc. using high performance purge device. Easy maintenance because of no back light.
| Line conditions etc | Sensor,Actuator |
|---|---|
| Strip Temp : 400～1100℃ Strip Thick : 1.0～12.0mm Strip Width : 900～1550mm Line Speed : max1680mpm There is mach steam Cooling-water scattering Camera Position : Path Line +700～800mm |
CCD Camera×4 Purge Air : 2Nm3/min Cooling water : 40l/min |
Coil Fish Tail Detector
Principle
It is equipment which glares lighting from the lower part of Coil which rotates on Cradle, catches the shadow generated in a part for a tail end in CCD Camera, and detects a Coil fish tail position. It aims at automation of entry side of process line.
Feature
- Accuracy (Fish tail position accuracy: ±50mm)
Exclusive H/W and Algorithm have realized. - It is non-contact type equipment using CCD camera, and stable detection can be performed.
- With various image-processing technology, the character on Coil, rust, Oil, etc. carry out disturbance removal.
| Line conditions etc | Sensor,Actuator |
|---|---|
| Coil Dia : 1200～2100mm Coil Width : 600～1350mm Coil Rotation Speed : 330mm/sec |
CCD Camera×1 Halogen Light×1 PLG×1 Laser Sensor×3 |
