1*7Prestressing steel strand making machine

Description:

1*7Prestressing steelstrand making machine

1.Productdescription

   The seller will provide a Low Relaxed StressSteel Stranded Wire Production Line forproduction of 1×7, Ø9.53~17.8mm low relaxed pre stress steelstranded wire, with the capability of 30, 000 tons per year. Theseller will guarantee the manufacturing technique, product quality,equipment unction, production capability and period of guarantee,and make sure the product will be in accordance with ChineseIndustrial Standards and corresponding with foreignstandards.

2.Manufacturingtechnique

2.1Specifications of finished products

2.2Standards of products

   GB/T5224-2003,American Standard ASTM-A416-2002, Japanese Standard, EuropeanStandard.

2.3 Rawmaterial

  The PC strands are drawnfrom good quality carbon steel hot rolled   coils andthen twisted.

2.4 Flowof manufacturing technique

  Wire coil sorbitizing----Pickling &phosphatization----Wire

  drawing----Twisting----Stabilization treatment----Wire taking up&

   Pay off----Layer winding----Productinspection----Packing----Warehousing

1.strander2.integrating tooling 3.distortion equipment 4.tensioning system5.movable intermediate frequency annealing stove 6.cooling tank7.Constant tensioning system 8.wire receiving & release device9.strand oscillator 10.winding system

2.5 Productioncapability

1)Working system

  Continuous workingsystem, 7 days a week without break during

Weekend

2) Productioncapability

30000T/year

3. Equipmentdescription:

3.1 Skip strandingmachine 1 6×1120

  For the skip strandingmachine, each set consists of 7 pieces of 1120 bobbins, is drivenby single motor. The transmission shaft and

Rotatingbody are connected by synchronous belt. With stable lay pitch, itguarantees the lay lengths of stranded wires in differentdimensions are in accordance with GB/T5224-2003. Big size bearingssupport the threading barrel to get enough space and make threadingvery easy. Each revolving part are connected with one another by aGRP cambered plate, which enables it reach the speed request ofhigher stranding machine. 7 single wires pass through each ownposition without interference with each other. The bracket ofcylinder escapement is movable, makes it easier for transfer andbalance adjustment. Damping system is loaded on the bracket toadjust the mutative tension of each single wire during production.Integrative bottom frame can make sure the bunching machine workssteadily.

Max.Rotatingspeed            680rpm

Drivingmotor                  A/C, 90KW, 1500rpm

Bobbinsize                 DIN1120

Dia. offlange                1120mm

Dia. ofbarrel                 630mm

Totalwidth                    964mm

Innerwidth                    840mm

Max.weight                 4000kg

3.2 Composing die andDeformer

   Different composingdies are loaded inside the die box for different size of wires.Manually adjusted by guide screw.

  Each deformer wheel is manually micro-adjusted, hydraulic cylinderopening to prevent broken lot strands.

3.3 Tensionsystem

Tensioningsystem consists of two sets of tension equipments. Two tensionwheels rotate same way and make the wire tensioned between thewheels. The wheels are welded by 42CrMo forged rings, machinedtooled and then quenching processed, with surface hardness ofHRC≥58. Cone gears are used in speed reducer.

Max.Speed                  100m/min (Ø15.24)

Max.Tension                 155000N (Ø17.8)

Motors:No.1                A/C, 250KW, 1000rpm

            No.2                A/C, 200KW, 1000rpm

Dia. Ofwheel:              2×2050mm

Numberof driver groove         5,V shaped

Numberof No.1 wheel groove     4, U shaped

Numberof No.2 wheel groove     4, U shaped

3.4 Constant tensionsystem

  Two fixed wheel carriers and 1 movable wheel carrier, which canmove up and  down, are loaded on one bracket. An air cylinderis with the movable wheel carrier to balance the tension betweenthe tensioning system and wire receiving & releasedevice. 

3.5 Wire pay off/Take updevice

  The device composes of 2independent bobbins, each of which is with the weight capacity of30 tons. The two bobbins work alternately, one for wire paying offand the other for wire taking up.

  Max.Speed             160m/min

  Motors:No.1            A/C, frequency variable, 45KW

                                     1000rpm, 2 sets

                 No.2            A/C, frequency variable, 2.2KW

                                    1500rpm, 2 sets

  Dia. offlange            2800mm

  Dia. ofbarrel             1000mm

  Innerwidth              1500mm

  Max. Weight capacity      3000kg 

3.6 Layer windingmachine

   Disassemblytype bobbin, motor drives the bobbin for wire winding, hydraulicpressure station helps unload wire from bobbin, by controlling 3oil cylinders installed with good quality hydraulic elements toguarantee stable work and the winding wontretract.

  Max. Linear speed       200m/min

  Motors:No.1            A/C, frequency variable, 37KW, 1000 rpm

 No.2                   A/C, frequency variable,1.5KW, 1500rpm

  OuterDia.                1600mm

  InnerDia.               800mm

  Width                    750mm

  Max. Weight capability      4000kg

  Number ofstrips            8pcs 

3.7 Cooling watertank

  Use stainless steel welding and fabricating the box, spray watercooling with air drying device. 

3.8 Auto-controlsystem

1) System briefintroduction

   Whole line equipment usefull digital control, use computer programming auto-control wholeline operation. Operator only need operate the control button andfine adjustment button to realize whole line running as per setupparameter, there has multiple protection and fault display oncontrol program to insure whole line equipment smoothly running.Automation control use SIEMENS S7-300PLC and touch screen TP270. ACspeed controller use vector control frequency converter. PLC usePROFIBUS-DP and network to connect with control system, control allthe operations of equipment, and realize reliableoperation.

2) Control function ofmain control panel

  Stranding machine controlsystem control product lay pitch together with first tensioncontrol system with matching speed, to insure constant lay pitchduring machine start, stop and moderating process. Second tensioncontrol is mainly to control tension, this can be as perspecification of product to set different tension and keep itconstant. Two pay off and take up machines can choose paying offworking model and take up working model, when it is take-up wiremodel, machine is under auto-paying off. And it will automaticcontrol the tension of paying off. All the process parameter(likespeed, tension and lay pitch etc.) is set by touch screen and willdisplay status of whole system like actual linear speed, actualtension and running status etc. Tension setting can continuous set,speed setting can continuous set production linearspeed.

3) Function of layerwinding operation cabinet

  Main setting of layerwinding operation box are linkage, single action control, linkageforward, linkage reverse, single action forward, single actionreverse and traverse machine inching etc. Layer winding machinecontrol system can auto control the array pitch of traverse machineby pay off sensor. Tension for paying off can beadjusted.