Pipe bending machine includes a very wide range with applications on metal structure, agricultural machinery, power machinery, as well as boilers, petrochemical, electrical power, light industry, along with other industrial sectors. With the particular rapid development of financial construction, the number of several tube bending machine as well as forming pipe fittings, specifications and material requirements are generally constantly increasing, the patterns pursue to renovate, while the precision and surface quality on the pipe bender put forwards higher requirements. This feature is especially prominent in certain industries for example power systems.
• Tube bending machine processing procedures
• The characteristics of roller bending machine
• Factors affecting the bending process-ability belonging to the pipe
Pipe bending unit processing methods
Roller bending machine processing method is quite a lot, according to the twisting method, it can become divided into rounding, drive bending, pressure bending along with roll bending; bending with or without filler might be divided into core (filler) bending no core (filler) bending; bending whether heating can be cut into cold bending in addition to hot bending.
Cold bending method includes a long history of growth, more types, while the hot bending method should be developed in the past two decades bending canning methods. The main esophagus cold roll-forming processing methods are:
1) pressure bending;
2) wrapping bending;
THREE ) rotary die bending;
4) pull bending;
5) rotate bending;
6 ) push bending along with forming methods.
The characteristics of roller bending equipment
In addition, there tend to be expansion tube bending, vibration and impact bending, wrinkle twisting, MOS bending and other bending processing methods, but generally not popular. In the actual television cold bending process, rotary die bending (or rotary pull bending radial-draw bending) could be the most common bending control methods, but also having CNC pipe bending appliance bending processing. The tube forming process discussed in such a paper is under this bending process means of research.
Compared with reliable plate bending, the pipe is hollow thin-walled structure on the cross-sectional shape, the stress-strain state analysis sometimes appears, the pipe in the bending process, the neutral layer outdoor the tensile stress and thinning on the pipe wall, the neutral layer inside compressive stress and thickening of the pipe wall, while the pipe cross-sectional distortion, that's, flattening. Therefore, no matter what sort of bending method is considered, in the pipe bender procedure, easy to produce this particular kinds of adverse phenomena:
YOU ) pipe bending exterior the thinning, or possibly cracking;
2 ) Television bender inner thickening, as well as unstable wrinkling;
3) water line section distortion (flattening), or even deflated.
Moveover, as the particular pipe bending is elastic-plastic deformation, when the load is removed, this pipe bender angle and also bending. Radius will happen elastic recovery, that is usually, springback phenomenon; at one time, in the bending method, the pipe is susceptible to tensile stress. At one time, in the bending method, the pipe is subjected to tensile stress. and develop elongation, that is, elongation way.
Factors affecting the bending process-ability with the pipe
All these phenomena besides affect the pipe twisting accuracy, but also figure out the steel bending machinability (i. at the. the pipe bending processing limit).
There are various factors that affect the particular pipe bending machinability, which are summarized as follows:
a new ) pipe bending machine shape parameters, including diameter, wall thickness, bending radius, cross-sectional contour, etc.;
b ) Water pipe characteristics, including yield tension, ultimate stress, elastic modulus, hardness, poor work hardening index, anisotropic parameters, etc.
c ) The accuracy belonging to the tube itself, such as the country, uneven wall thickness in the spoon hook degree;
d )the machining process, the manner of machining:
e )bender, design and size of "bend" plus "core" communicator;
f )cavity slippage condition belonging to the cavity, etc:
g ) the working temperature on the machined portions.
which certainly are a, b), c) the common material parameters, d), e), f), g) the normal machining conditions.
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