Tubing

I watched sleep from my eyes and glanced at 5 AM in the alarm clock. "Yes, I have enough time." I thought. As I tried it as quiet as possible, when I tried it did not work so I immediately prepared a cereal breakfast. I checked my list and grabbed my equipment and I started off on a cool and declining morning to wait for a taxi. You can taste excitement and moisture. At the beginning of the day, all other missionary children marched to the Philippine Davao River full of anxiety and adventure.

The procedure for making a tube jacket is simple: Cut the tube from a straight, rigid tube (or twisted or annealed hose without bending). You can use a tube cutting saw for fast and accurate cutting. A typical pipe type pipe cutter rolls too much material and does not set its length. Remove one end of the pipe so that it slides onto the punch which is perfect against the inner diameter. Place the tube over the first punch in the mold, then push the punch and sheath into the END ROUNDING DIE and rotate one end to close it (or complete with a hydraulic press). Close) The end fillet mold is not specific to the caliber. It is designed for pipe of specific diameter. The punch attached to the mold is designed according to the diameter and wall thickness of the pipe. If you change the external punch according to the thickness of the new pipe, you can change the thickness of the wall and use the same mold.

It is annealed and placed in a straight core mold with two special punches. The two punches have tips that fit inside the cannula. They also have a shoulder that fits snugly against the mold and presses against the end of the pipe. Since the tube is supported by the punch and is pushed by the shoulder at both ends, the only position it can move is to bend inwards between the two punches. This will happen and the tip of the punch will be folded. Under heavy pressure, the crease becomes a hard partition with a hole in the middle, its diameter depends on material thickness, caliber and other characteristics. Given the number of variables, it is impractical to accurately design the hole diameter.

Diameter depends on type (original pipe diameter). For a given diameter, the wall thickness is unique to the outer punch. And the length of the jacket is specific to the length of the punch. A part of the punch is attached to the inside of the tube and abuts on the shoulder of the punch. The tube is typically about 1/2 the diameter of the tip of the punch so that the unsupported portion protrudes beyond the punch and is pushed in to form an inclined base in the mold. If you try to use a longer pipe, you may bend or break because the punch does not support too many pipes. If you try to use a tube that is too short, the punch will not break, and if pressed strongly it may hurt the punch or break the mold.