Notes on the Modification of Pipe Bending Molds and the Storage and Installation of Bent Pipes

Notes on the Modification of Pipe Bending Molds and the Storage and Installation of Bent Pipes

The design process of bent pipes involves encasing an induction coil around a steel pipe, clamping the pipe head with a mechanical rotating arm, and using medium-frequency electric current to heat the steel pipe within the induction coil. As the steel pipe's temperature rises to its plastic state, mechanical thrust at the rear of the pipe pushes it forward, shaping the bent pipe through the processes of heating, extrusion, bending, and cooling, aided by a cooling agent.

The use of bent pipes has proven highly effective in current production processes. They not only provide well-prepared materials for pipe fittings but also play an irreplaceable role in cost savings. Bent pipes need to possess not only good compressive strength but also other excellent characteristics, especially as they are increasingly used in various industries like chemical, power, and energy engineering, thanks to ongoing societal development.

It's widely known that the bent pipe mold is a crucial component in producing bent pipes of different shapes and qualities. To save costs, practical modifications have been made to the mold through various cutting processes, taking into consideration its unique features.

Here are some key points to consider when modifying pipe bending molds:

1. Clamping Section: The clamping section of the mold should not be too short to prevent steel pipe deformation. A clamping length of approximately 20mm is recommended. In the soft and thin sections of the mold, the clamping part should pass through a core rod to prevent deformation. As both the clamping and wheel molds rotate simultaneously, excessive clamping force is not necessary. Clamping force can be adjusted based on pipe diameter and wall thickness.

2. Gap Between V-shaped Clamps: When V-shaped clamps are used for clamping, there may be occasional gaps between the clamps and wheel molds. The gap size is related to the pipe's diameter. For a φ10 mm pipe, the gap is smaller. As the pipe diameter increases, the gap gradually widens, but this doesn't affect clamping and processing.

3. Switching to R-shaped Clamps: For pipes larger than φ18 mm, it's advisable to replace V-shaped clamps, wheel molds, and guide molds. Unlike V-shaped clamps, R-shaped clamps maintain a consistent gap between the clamps and wheel molds. The V-shaped dimensions of the guide mold and clamps should be uniform, making it easier to observe and adjust the bent pipe mold. Through these modifications, you can save costs for approximately 20 different types of bent pipe molds in a year, significantly reducing production time.

For long-term storage, bent pipes should undergo regular inspections. Those frequently exposed to the ground should be kept clean and stored neatly in a well-ventilated, dry indoor area. Outdoor stacking or storage should be strictly avoided to ensure that bent pipes remain dry, breathable, and clean, following precise storage methods.

During installation, welded pipe fittings can be directly installed on the pipeline, taking into account their intended position. In general, bent pipes can be installed in various pipeline positions, with a focus on convenient inspection. It's important to ensure that the flow of the medium is upward from the downstream valve, and bent pipes should be installed horizontally. During bent pipe installation, pay attention to sealing to prevent leakage, which could disrupt the normal operation of the pipeline.

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