What are the defects of traditional hydraulic pipe cutting machine?
The traditional shortcomings of hydraulic pipe cutting machine are analyzed as follows: the traditional twists and turns of the conduit are based on two-dimensional product drawings. The main methods include hot bending of sand filling material, manual cold bending of sand filling material, common machine bending and liquid filling bending of steel pipe, etc.
The quality of the products produced by the traditional elbow is largely affected by the experience and technical proficiency of the operator. Therefore, in the case of large differences in tube shape and a large amount of proofreading required, it is difficult to make a better guarantee for the tortuous quality of large-diameter catheters, which usually presents problems such as very poor roundness of the product, wrinkling at the inner radius, and the inability to completely eradicate the filler in the lumen.
The forming limit of pipe fittings shall include the following contents:
1) In the compression deformation zone inside the neutral layer, the thin-walled structure part under the action of tangential compressive stress will not exceed the instability and wrinkle;
2) The large elongation deformation in the tensile deformation zone outside the neutral layer does not exceed the plastic allowed value of the material and splits;
3) Assuming that the pipe has a plea for ovality, the manipulation of its section distortion;
4) Assuming that the pipe has the strength to bear the internal pressure, control the forming limit of its wall thickness reduction.
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