Due to a variety of reasons in the wire drawing process, there will be some problems, and even waste products.In order to reduce and eliminate the waste products, it is necessary to adopt strict quality management practices and implement quality assurance systems. According to the past experience, the following problems and causes of waste products are analyzed, and solutions are proposed.
1.Cause and treatment of incorrect size and shape of products
If the surface of the single wire is scarred during the drawing process, waste products will be produced. Possible causes and solutions are as follows.
| Cause | Solution |
| Wire die wear | 1.The wire diameter should be measured frequently.
2.The wire die should be replaced in time if it is close to the tolerance limit. |
| Safety factor is too low,
the wire is stretched |
1.Reduce the tensile stress.
2.Improve the lubrication effect. 3.Improve the quality of the wire mold. 4.Adjust the mold. 5.Adjust the tension of the wire. |
| Use the wrong line die | Measure the wire diameter when threading the die |
| The wire is scratched
and bruised |
1.The threading should be correct.
2.The work should be checked frequently. 3.The place that causes damage to the wire should be repaired. |
| Line deflection, that is, the center of the die hole and the center line of the cable are not aligned | Pay attention to straighten the mold, if there are obstructing factors should be repaired |
2.Cause and solutionof single line surface scars
In the wire drawing process, if the surface of the single wire appears peeling, pitting, triangle mouth and burr, it will produce waste products. The possible causes and solutions are as follows.
| Cause | Solution |
| Jump-wire phenomenon on cone drum wheel | 1.Drum surface polishing
2.Angle maintenance is correct |
| Safety factor is too low,
the wire is stretched |
1.Reduce the tensile stress.
2.Improve the lubrication effect. 3.Improve the quality of the wire mold. 4.Adjust the mold. 5.Adjust the tension of the wire. |
| Use the wrong line die | Measure the wire diameter when threading the die |
| The wire is scratched
and bruised |
1.The threading should be correct.
2.The work should be checked frequently. 3.The place that causes damage to the wire should be repaired. |
| Line deflection, that is, the center of the die hole and the center line of the cable are not aligned | Pay attention to straighten the mold, if there are obstructing factors should be repaired |
3.Cause and solution of single line surface peeling, pitting and burr
In the wire drawing process, if the surface of the single wire appears peeling, pitting, triangle mouth and burr, it will produce waste products. The possible causes and solutions are as follows.
| Cause | Solution |
| The rod has a flash edge | Strengthen inspection, unqualified products do not flow into the drawing process. |
| The die hole is not smooth, there are defects such as cracks in the deformation and sizing area, and the connection at the junction is not smooth | 1.Re-repair mold, polishing;
2.Strict inspection, unqualified line mold is not used on the machine |
| Poor lubrication | Check the lubrication system or replace the lubricant to improve the lubrication effect. |
| Check the lubrication system or replace the lubricant to improve the lubrication effect | The drum is not smooth, the sliding rate is too large |
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