1, equipment straightening wheel running at high speed rotating in the outer wall of the copper tube, the need to straighten the copper tube, calibration, so the fit is tight, resulting in dust particles, copper powder and copper tube friction caused by irregular abrasions, scratches on the copper tube.
2, feed conduit in the knife frame forward conduit long-term friction caused by the feed conduit burrs, copper tube in the high-speed feeding of linear scratches.
3, positioning sleeve in the cage is not at the same level or straightness is not enough to cause the copper tube in the forward and backward center to one side of the linear scratch.
4, equipment in the rejection action when the rejection device will enter the mold inside, over time will cause a certain amount of scratching of the mold and produce burrs on the copper tube scratches.
Two, for the problems combined with the actual development of preventive measures.
1, the requirements of the supplier, the raw materials do not allow the appearance of dust, copper powder, and other obvious dirt (identification method: visual inspection and touch no foreign objects).
Regular use of clean rags stained with volatile oil on the straightening wheel for wiping, (the use of volatile oil can be more effective in dust cleaning at the same time to straighten the wheel for rust treatment and does not affect the residual other components of the copper tube) can reduce the amount of dust attached and reduce the chances of scratching.
2. Replace the metal conduit with plastic conduit to minimize copper pipe scratches.
3, the regular use of infrared laser level on the equipment to calibrate the level of the tool holder and cage detection, the iron positioning sleeve replaced by stainless steel positioning sleeve, reduce the positioning sleeve caused by straight line scratches.
4, in the replacement of the rewinders on the rewinders chamfering deburring treatment of the mouth of the rewinders, the regular use of fine sandpaper on the rewinders in use for repair. Reduce the friction of the reclaimer on the mold and reduce the generation of mold burrs to reduce the copper tube scratches caused by mold problems.
Three, improve the effect.
1, the product yield rate greatly improved, the number of equipment downtime to reduce the OEE upward trend.
2, reducing the scrapping of raw materials and workpieces, reducing the cost of a single machine, the following chart for the 16 years 5-7 months of bad parts and the number of downtime statistical breakdown, compared with 15 years is a downward trend.
Through my analysis of the problem of copper tube scratches and the development of preventive measures, I y feel the importance of product quality for an enterprise. To this end, we should actively learn new processes, new technologies, new processes, new technologies reasonably applied to the work in an effort to improve product quality *** with the enterprise to meet the new world.