Hygienic pipe fittings production process introduction

Process flow for sanitary pipe production. If the elbow is inverted, if the long radius elbow is used, if the tube of the Tianguan company is used, the specification should be selected first and the pipe material should be proposed. The expansion rate, through theoretical calculations, is generally between 33% and 35%, and is pushed back. The general diameter expansion ratio of a short radius of 219 mm is 50%. After selecting the raw materials.
Cut the material according to the elbow specification, and then consider the radius of curvature, such as:
The 90° elbow, through its curvature, can be used to calculate the elbow that can be machined to 90°. It can be calculated by theoretical calculation, and then cut with the length as a fixed length. Finally, the material is hot pushed. The pusher may have been seen by everyone, and the actual situation is very simple. It is a horn-shaped core or mandrel.
The mandrel is thickened and thinned, and the pushing process is a process in which the expanding belt is bent. There is support at the back, and the cutting pipe section is inserted into the mandrel.
There is a archway behind to fix the mandrel. There is a small car in the middle, some of the cars are driven by hydraulic pressure, some are driven by mechanical transmission, that is, screw drive, and then push the trolley forward. The trolley pushes the tube forward along the mandrel, and there is an induction coil outside the mandrel to heat the tube.
Heat it up, then the car pushes the tube down and processes one. After the push, the elbow is shaped in this hot state. Because some elbows are handled improperly, they will be distorted, which is not allowed. In addition, after the head is pushed, the outer diameter of the front end is generally large.
To be shaped by the shaping mode. The shaping die is actually a press and has a set of molds.
Two semi-circular arcs, one on each side. The outer diameter after shaping has reached the size requirement of the finished product. The wall thickness is controlled by the wall thickness of the material. The wall thickness tolerances of the elbow and the pipe are the same, both ± 12.5%. In the process of pushing, the wall thickness should not change under normal conditions, but if it is due to tools, wall reduction will occur in some places.
Therefore, when the material is generally raised, the wall thickness should be increased by some margin.