Rigid Frame Stranding Machine is suitable for stranding long length and section aluminum, bare copper,aluminum alloy, aluminum cable steel reinforcing wires to produce the following power cables: sector shaped conductors, round compacted,single core prespiralled.
It is an indispensable part of the production of cables, so what should we pay attention to during operation? This time, Mentors will share with you three aspects.
1. Key points of operation：
1.1 Before starting the Rigid Frame Stranding Machine, you should carefully check the correctness of the running components, the reliability of the interlocking mechanism and the wire reel tightening, and the locking mechanism can tighten the wire bobbin. The entire machine’s fence protection should be in place to ensure safety.
1.2 No matter under what circumstances the machine is turned on, you should always pay attention to the changes in current, voltage, temperature and other parameters of each part. Any large fluctuations are dangerous, and you should stop the machine immediately for inspection. After troubleshooting, you can start the machine.
1.3 According to the production plan and process requirements, loading the bobbins and wires,arranged according to the prescribed structure. When loading the bobbin, pay attention to the balance of the bobbin and the correct placement of the bobbin in the direction of wire pay-off. The direction of the bobbins in a frame should be in the same direction. After clamping the bobbin, lock and fix it with an interlocking device to prevent accidents. Adjust the tension to achieve basically the same.
1.4 Single wires must not be scratched when passing through the wire holes. They must be evenly spaced through the wire holes or wire divide boards and must not cross each other.
1.5 When installing the die, it must be aligned with the center and the quality of the die should be checked to see if it is good. The surface of the inner hole of the die or the contact area between the pressing wheel and the conductor surface should be smooth.
1.6 Adjust the pitch and rotation direction of each section according to the process requirements.
1.7 When producing sector-shaped conductors, the sector height adjustment should be performed at a slow speed while adjusting the height of the pressing roller. Static adjustment of the pressing roller is not allowed to prevent breakage caused by uneven deformation of single wires.
2. Precautions
2.1 Always pay attention to observing whether the mechanical and electrical equipment and various instruments of the Rigid Frame Stranding Machine are in normal condition.
2.2 Frequently check whether the outer diameter (or fan height, shape height) and pitch of the product are consistent with the process requirements.
2.3 When changing specifications, connectors, and normal startup, attention should be paid to checking the surface quality and structural dimensions of the wire.
2.4 The fan-shaped height of the pressed wire core must be controlled within the specified range. If the requirements are not met, the pressing wheel should be adjusted in time.
2.5 The traversing should be tight and neat, and no pressure, disorder, scratches, etc. are allowed.
3. Common Problems And Solutions During Production
| Problem | Reason | Method |
| Stranding pitch exceeds standard | 1. The haul-off speed slows down or stops, but the cage continues to rotate | Adjust the equipment to synchronize the whole Rigid Frame Stranding Machine |
| 2. The wire core slips on the haul-off wheel | Wrap the wire fully and increase the tension of the take-up machine according to the dividing groove of the haul-off wheel | |
| Single wire break | 1. The quality of the single wire is poor, with impurities, hollow cores, etc. | Replace qualified single line |
| 2. Welding is not strong | Weld the welding spots firmly | |
| 3. The side plate of the wire bobbin is deformed and is not round, and the single wire is scratched. | Repair or replace the cable reel | |
| 4. Wire stuck at the wire hole | Clean or replace wire holes | |
| 5. The tension of the pay-off bobbin is too high | Adjust tension | |
| 6. The dies do not fit | Replace dies | |
| Folded or arched | 1. Single wire threading is incorrect | Adjust threading |
| 2. The hole diameter of the wire passing die is too large | Replace the wire passing die with a suitable aperture | |
| 3. The tension of the bobbin is too small | Adjust tension | |
| 4. There is a sharp bend in the single wire that cannot be straightened due to tension. | Strengthen the inspection of products in the previous process. Unqualified wire cannot be put on the machine. | |
| Surface scratches | 1. The die is not smooth or the upper and lower die halves do not match well | Replace or adjust the die |
| 2. The wire passage holes, wire dividing dies, and guide wheels have been used for a long time and have been worn into grooves, and the guide wheel bearings are seized | Repair the wire passing hole, replace the wire nozzle and guide wheel | |
| 3. There is a defect on the haul-off wheel that slightly damages the stranded wire. | Polish the haul-off wheel smooth | |
| Wrong size | 1. The upper and lower wheels are not aligned | Adjust the pressure wheel |
| 2. Wrong specification of pressure wheel | Replace pressure wheel | |
| 3. The pressure wheel bearing is damaged | Replace bearings | |
| Surface oil stain | 1. There is oil stain on the single wire | Wipe the oil stain clean. Unqualified single wires cannot be put on the machine. |
| 2. During the production process, something with oil stains touches the surface of the stranded wires. | It is strictly forbidden to touch the wire surface with oily things. | |
| The traversing of steel core aluminum stranded wire is not neat | 1. Low traversing tension | Adjust traversing tension |
| Have gaps on the surface of the steel core aluminum stranded wire | 1. The pitch is too large | Adjust the pitch so that there are no gaps in the outer layer |
| 2. Single wire outer diameter is too small | Replace the single wire to make it meet the process requirements | |
| 3. Aluminum single wire pre-deformation is not suitable | Adjust the pre-deformation so that the pre-torsion pitch is slightly smaller than the pitch of the steel core aluminum stranded wire | |
| 4. The inner core is out of tolerance | Strictly control the outer diameter of the steel core and inner core | |
| Conductor surface bamboo-shaped | 1. The haul-off speed is fast or unstable | Adjust haul-off speed |
| 2. The die sizing area is short | Replace qualified die |
The above is the knowledge about operating the Rigid Frame Stranding Machine. If you want to know more about the technical parameters, welcome to contact us.
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