Digital Control Pickling Wire Stranding Machine For European Standards

1. Manufacturing technique

The seller will provide a Low Relaxed Stress Steel Stranded Wire

Production Line for production of 1×7, Ø9.53~17.8mm low relaxed pre stress steel stranded wire, with the capability of 30,000 tons per year. The seller 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 Chinese Industrial Standards and corresponding with foreign standards.

1.1 Specifications of finished products

1.2 Standards of products

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

1.3 Raw material

The PC strands are drawn from good quality carbon steel hot rolled coils and then twisted.

1.4 Flow of manufacturing technique

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

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

Pay off ----Layer winding----Product inspection----Packing----Warehousing

1.strander

2.integrating tooling

3.distortion equipment

4.tensioning system

5.movable intermediate frequency annealing stove

6.cooling tank

7.Constant tensioning system

8.wire receiving & release device

9.strand oscillator

10.winding system

1.5 Production capability

1) Working system

Continuous working system, 7 days a week without break during

Weekend

2) Production capability

30000T/year

2. Equipment description:

2.1 Skip stranding machine 1+6×1120

For the skip stranding machine, each set consists of 7 pieces of 1120 bobbins, is driven by single motor. The transmission shaft and Rotating body are connected by synchronous belt. With stable lay pitch, it guarantees the lay lengths of stranded wires in different dimensions are in accordance with GB/T5224-2003. Big size bearings support the threading barrel to get enough space and make threading very easy. Each revolving part are connected with one another by a GRP cambered plate, which enables it reach the speed request of higher stranding machine. 7 single wires pass through each own position without interference with each other. The bracket of cylinder escapement is movable, makes it easier for transfer and balance adjustment. Damping system is loaded on the bracket to adjust the mutative tension of each single wire during production. Integrative bottom frame can make sure the bunching machine works steadily.

Max. Rotating speed 680rpm

Driving motor A/C, 90KW, 1500rpm

Bobbin size DIN1120

Dia. of flange 1120mm

Dia. of barrel 630mm

Total width 964mm

Inner width 840mm

Max. weight 4000kg

2.2 Intermediate frequency tempering furnace

Use full digital microprocessor control circuit to closed-loop control of equipment output power and running speed, realizing automatic tracking function of power and speed. . In order to insure control the tempering temperature at ±8°Cof steel strands ( thermodetector will show temperature), machine will use movable heating method. Once equipment stay in normal running program, steel stranding wire can reach the process required temperature in short time, this can avoid the non-tempering wire when re-start, reduced metal consumption.

Rated power: 600Kw

Processing temperature: 380-420°C

2.3 Auto-control system

1) System brief introduction

Whole line equipment use full digital control, use computer programming auto-control whole line operation. Operator only need operate the control button and fine adjustment button to realize whole line running as per setup parameter, there has multiple protection and fault display on control program to insure whole line equipment smoothly running. Automation control use SIEMENS S7-300PLC and touch screen TP270. AC speed controller use vector control frequency converter. PLC use PROFIBUS-DP and network to connect with control system, control all the operations of equipment, and realize reliable operation.

2) Control function of main control panel

Stranding machine control system control product lay pitch together with first tension control system with matching speed, to insure constant lay pitch during machine start, stop and moderating process. Second tension control is mainly to control tension, this can be as per specification of product to set different tension and keep it constant. Two pay off and take up machines can choose paying off working model and take up working model, when it is take-up wire model, machine is under auto-paying off. And it will automatic control the tension of paying off. All the process parameter(like speed, tension and lay pitch etc.) is set by touch screen and will display status of whole system like actual linear speed, actual tension and running status etc. Tension setting can continuous set, speed setting can continuous set production linear speed.

3) Function of layer winding operation cabinet

Main setting of layer winding operation box are linkage, single action control, linkage forward, linkage reverse, single action forward, single action reverse and traverse machine inching etc. Layer winding machine control system can auto control the array pitch of traverse machine by pay off sensor. Tension for paying off can be adjusted.

3. Utility facility requirement

3.1 Equipment installed gross capacity 1292.9Kw

Stranding machine 110Kw, tension device 200+250 Kw, intermediate frequency tempering furnace 600 Kw paying off and take-up wire device 2x45Kw+ 2x2.2 Kw, layer winding machine 37 Kw, wire traverses 1.5 Kw

3.2 Cooling water requirement

1) Muddy water circulation system(cooling water steel--stranding wire processing required)water quality, water pressure flow and inlet, outlet temperature.

Flow: 60m3/h

Pressure:>=0.4Mpa

Water quality:city water supply standard CJ/T206-2005

Temp.:<=32°C

2) Soften water circulation system(cooling water--intermediate frequency heating furnace required)water quality,water pressure flow and inlet, outlet temperature.

Flow: 30m3/h

Pressure: 0.1—0.25Mpa

Water quality:industrial boiler water quality GB1576-2001

Temp.:<=35°C

3.3 Compressed air

Compressed air consumption 3 m3/min, pressure: 0.7Mpa