镀锌专业英语.doc

1 热镀锌专业英语单词表热镀锌专业英语单词表 一 一 equipments of the line 生产线设备 生产线设备 entry section 入口段 cleaning section 清洗段 coating section 镀锌段 exit section 出口段 1 entry coil car 入口钢卷小车 入口钢卷小车 entry section saddle 入口钢卷鞍座 hot rolled steel strip hot strip 热轧钢板 cold rolled steel strip cold strip 冷轧带钢 coil car frame 车架 lift platen 提升盘 hydraulic lift cylinder 提升液压缸 hydraulic motor 液压马达 power track 拖链 hose and cable 软管和电缆 AC motor 交流电机 speed reducer the lower blade is movable and actuated by hydraulic cylinder articulated rod and double levers in V A special pin is provided to avoid any shearing operation during the maintenance periods Blades are in special steel x 100CrMoV51 each has four cutting edges for low maintenance and long life The moveable blade has a slight slope and the fixed one is straight The moving holder slides in machined ways on the shear side frame These ways are lined with replacement brass wear plates The rigid frame is of fabricated welded design Guides and supports are mounted so as to avoid hurting of the 28 ends during feeding and contact with blades while running Just before the shear blades a low pinch roll unit is mounted actuated by 2 pneumatic cylinders with rack and pinion system for synchronisation Top roll is fixed and driven by hydraulic motor the bottom roll is moveable and idle The purpose of this pinch roll is to clamp the strip during cutting sequence to thread the front end of strip into the shear and to discharge the last crop end A photocell in combination with a pulse generator signal ensures that the latter is long enough to avoid the falling of small residual pieces in the machine Note The shear item 168 at bottom pass line includes a second pinch roll unit identical to the pinch roll here above and mounted on the frame of the shear at exit side The purpose of this additional item is to deliver the scrap pieces onto the conveyor dedicated to the removal of scraps in cross direction at bottom pass line see item 172 For purpose of easy maintenance the N 1 and N 2 shear housings are mounted on slides with this system the two superposed shears can be transferred off line by an auxiliary manual hoist The gap between the blades is adjusted manually by a screw system 29 3 Welder Carriage The carriage will be moved by means of AC servo motor of changeable speed through ball screw The carriage will move at right angles with the strip supported by guide ways which are fitted to the main base A shearing mechanism welding electrode mechanism welding transformer etc are incorporated in the carriage The carriage will conduct welding by moving to driving side DS Shearing unit The welding machine has a double cut shear available for simultaneous cut of leading and trailing coils having been clamped to make correct lapping of the both ends of leading and trailing strips The relationship between upper and lower parts can be located correctly by means of the guide pins Electrode heads The upper and lower electrode heads are composed of an electrode housing of copper alloy and electrode shaft subjected to internal water cooling effect electrode wheel bushes caps etc They are available for easy conversion of electrode wheel The changing time for complete electrode assembly 3 min per one piece under normal condition Clamping unit 30 A beam type clamping unit will be equipped on the entry and exit sides of the main base The entry clamp will clamp trailing coils move in the line direction after sheared and lap both ends of the strips When the entry clamp moves for lapping the exit clamp will incline the leading coil so that the both ends of the coils may not come in contact with it 4 FURNACE GENERAL DISPOSITION The proposed furnace is of the vertical continuous annealing type suitable for processing strip to automotive quality The main characteristics of the proposed equipment are A preheating section able to heat up the strip by recovering heat in the exhaust gases of the heating section The advantages of the preheat section are the preheating section will provide an energy saving of approximately 7 to 8 on the gas consumption the strip temperature at the exit of the preheat section will be around 180 to 200 C and the thermal shocks on the first deflector rolls of the heating section will be decreased This is very favorable for the life time of the rolls and the 31 strip tracking the strip is heated by blowing hot atmosphere gases on the strip providing an efficient cleaning of the surface A multipurpose heating section provided with complete radiant tube heating capacity This arrangement is the most suitable to the actual requirements for the following reasons in combination with the preceding electrolytic cleaning section it guarantees the zinc adherence in continuous and transient operations the moderate furnace temperature in the radiant tube heating section will guarantee the absence of any adverse effects on the thin strip during line stops and transient operations heat recovery of the strip s energy consumption is the maximum possible and the final hot water production is in accordance with the technical requirements of the cleaning section maximum flexibility of operation is achieved by the use of light internal insulation and the homogeneous conception of the furnace A slow cooling section before the rapid cooling section A rapid cooling section of type XSQ able to provide a cooling rate of 45 C s for DP and TRIP material of 2 3 mm thickness and deliver to the equalising section a strip with uniform transverse temperature 32 A holding section able to hold and equalise the strip temperature and to provide a buffer area between the coating section and the rapid cooling section An exit section incorporating a bridle roll set suitable to deliver into the zinc pot a strip under high tension necessary to provide stability through the zinc wiping system Mobile and fixed electrically heated galvanneal soaking sections A cold air after pot cooling section A pair of water cooled deflector rolls at the top of the tower A final air cooling section to decrease the temperature before the water tank A water cooling section including spray quench tank wringer rolls and dryer 5 CERAMIC COATING POT Pot 1 pot of arc welded steel sheet and sections with 2 connecting flanges for the inductors Bath level control device by laser see item 13 cable track thermocouple one in operation and one in back up Type K thermocouples are in a SS protection tube length 500mm Final position to be defined on site according the 33 ingot charging and cleaning positions Two inductors 550 kW each comprising 1 inductor core of laminated grain orientated sheet 1 inductor casing of welded steel sheet 2 coils 2 fans for cooling each inductor 2 Pt100 sensors to measure the bushing temperature All inductors would be provided with one common channel ramming former Steel shell Set of engineering for the main coating pot welded steel casing for local manufacture by the Customer The coating pot is designed with a reinforced base to permit the mobile operation 6 air knives air knives Each air knife is designed as one unit consisting of fixation traverse and knife Consoles with centering pins are fixed at the front sides of the fixation traverses When lodging the knives into the centering pins of the horizontal location consoles of the air knife system these centering pins are lowered On the fixation traverses the quick connection for the stripping medium hose and a console with rapid action coupling for 34 the connection of the pressure transmitter are provided sink roll The sink roll traverse is fixed to both location consoles by screw connections In the assembly trestle the sink roll arms are horizontally adjustable by 60 mm for zero point adjustment passline adjustment Thus the sink roll can be used from 800 mm to min 730 mm diameter The bearing shell in the sink roll arm consists of highly wear resistant ceramic and is designed as a bi surface bearing prism bearing The ceramic prism bearing in combination with the Stellite bearing bushes of the roll guarantees a travel of the sink roll without vibrations stabilization roll In the assembly trestle the stabilization roll arms are horizontally adjustable by 40 mm for zero point adjustment passline adjustment Thus the stabilization roll 250 can be used up to min 190 The stabilization roll traverse is fixed at both location consoles of the adjustment device Pos 1 1 6 by screw connections and centering pins The bearing shell in the roll arm consists of highly wear resistant ceramic and is designed as a bi surface bearing The ceramic bi surface bearing in combination with the Stellite bearing bushes of the roll with a roll diameter of 35 250 mm guarantees a travel of the stabilization roll free of vibrations without additional drive 7 TEMPER MILL Process the defined quality of the material to get The convenient strip aspect and roughness The metallurgical quality with the convenient elongation The temper mill is a 4 high mill equipped as follows Temper mill stand with the possibility to work with two sizes of work rolls Small diameter 450 mm for hard products Large diameter 600 mm for soft products Rolling force given by hydraulic cylinders at the bottom controlled by servo distributor which allows To close the temper mill on the strip which is running without risk of strip marking The contact between work roll and strip is achieved smoothly therefore this sequence is named soft kissing To control the position at opening and closing period To control the rolling force Tilting possibility Very short response time Automatic pass line adjustment system Positive and negative bending controlled by servo distributor 36 Strip tension measurement used to control the temper mill Wet system with pure water for GA products or water detergent for GI products The wet system is the best way to clean the rolls and improve very efficiently The surface aspect of the strip The roll life between grindings Roll change system allowing the roll change the line being running An anti crimping roll located just before the work rolls is useful to prevent the risk of pleating on the strip especially for thin thickness and under low strip tension A billy roll located at the exit side of the stand to prevent the fish bones surface defect on certain strip qualities A quick work roll change system High pressure cleaning system on work rolls and back up rolls Cleaning system after temper mill Supply by CMI 8 Basic automation The Line Coordination Control LCO is the master control for every plant section Entry Process and Exit Section It provides different modes of operation to control the plant and ensures that everything works in a proper and coordinated manner Depending on the operating mode the assignment of setpoints and the operation of the line is 37 performed by the process computer the visualisation system or local operator consoles The LCO controls the whole line by using other functions as subordinated controler It coordinates all processes and movements of the strip and to the strip and initiates the permissive of setpoints positionings controls cutting programs etc In addition numerous monitoring and diagnostic functions of the plant operation are available If a line coordination function can not be started or a malfunction occurs a detailed diagnostic system indicates the location and the reason of the problem in order to enable the operator to clear the situation as quick as possible 9 Strip tension control It is important that the strip tension in the looper is kept constant during all changes of entry and exit strip speeds or looper position The strip tension is measured preferably at a point nearest to the active process and is used as the correction setpoint for the subordinate winch drive speed control This advantage of a direct tension control compared to the indirect method is its independence from strip cr