Copper pipe flaring and rising tube may lead to air conditioning copper pipe cracking, in the production process, copper pipe flaring and rising tube belongs to a strong continuity of the production process, generally composite for a process. In-depth analysis can be found, the quality of the copper tube itself, the user may lead to improper use of copper pipe cracking.
First, the air conditioning copper pipe cracking
Caused by the air conditioning copper pipe cracking more reasons, the main reasons are as follows:
1, the air conditioning copper pipe quality reasons.
Air conditioning copper tube quality reasons can be divided into the outer surface defects, scratches on the inner surface, the inner surface oxidation and so on.
Air conditioning copper pipe in the rising tube, expanding the mouth of the cold working deformation, the surface is subject to tensile stress and elongation, when the air conditioning copper pipe outer surface has a depth of scarring, air conditioning copper pipe outer surface can not withstand the surface tensile stress, the formation of pull-off phenomenon, that is, we see the air conditioning copper pipe outer surface cracking.
Air conditioning copper tube supplier of copper tube inner surface scratches caused by the cracking mechanism and the outer surface of the wound caused by the cracking mechanism is similar. Air conditioning copper tube inner surface has oxidation, in the rise of the tube due to oxidation of the inner surface of the copper tube friction and no oxidation of the inner surface of the air conditioning copper tube friction is not equal, resulting in the same length of air conditioning copper tube under the pier length size is not the same, flaring the amount of small air conditioning copper tube under the pier extends the length of the length of the long, resulting in flaring is too large and cracking.
2, air conditioning copper tube users use the reasons.
Air conditioning copper pipe in use, often coil straightening, cutting and sizing, cutting often use chipless cutting.
Air conditioning copper tube heat treatment surface is relatively soft, in the chipless cutting, when the cutter is unfavorable or cutting too much under the knife will cause air conditioning copper tube shrinkage or burr too much, the formation of the port fringe, port hardening, resulting in cracking when flaring.
A heat exchanger consists of a number of "U" tube, the length of each "U" tube and each "U" tube length of the two ends of the consistency of the requirements are very high, when bending When bending the "U" tube, due to equipment or adjustments caused by the length of the "U" tube and the length of each "U" tube two ends of the length of the difference is too large (more than 2mm), so when flaring Will appear due to the port is too long copper tube extends too long and caused by too much flaring and cracking.
3, common copper pipe cracking are affected by the supplier's products itself defects or customer processing, there are some cracking factors such as: copper pipe design tolerance is unreasonable, copper pipe mechanical properties and processing methods do not match other factors need attention.
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