Requirements for the bent pipe
There, where you need to bring a variety of communication or to build a pipeline for other purposes, required curved pipes of different diameters. To create the desired configuration of bends in the pipe industry and home use special equipment - the so-called profile- and benders. any owner, who knows how to handle the tools, fully able to implement the production profilegiba and tube bender with his own hands. Principle of operation these mechanisms are the same due to the fact, that the pipes are varieties of profiles.
However, before, how to start manufacturing profilegiba and bending tool with their own hands, it is important to get acquainted with some features of profiles and pipes.
Requirements for manufacturing bending profiles and pipes with wall width to 2 mm:
- for pipe with wall thickness up to 2 mm and a diameter of 5 to 20 mm is the limit bending radius 4 its diameter;
- for the same thickness of the walls, but a diameter in the range of 20 – 35 mm bending radius is already 5 diameters;
- for the same wall thickness and diameter over 35 mm, tube or profile curving smoking. In this case it will be necessary to make the sectional bending.
Requirements formed by bending profiles and pipes with wall thickness greater than 2 mm:
- for pipe with wall thickness over 2 mm and a diameter 35 mm bending radius should be equal to 3 diameter;
- if the same width of the wall and the diameter is in the range from 35 to 60 mm is considered the optimum bend radius equal to 4 diameter;
- for pipe with the same width of the wall and diameter 60 – 140 mm bending radius is not less than 5 pipe diameters;
- if the pipe diameter exceeds 140 mm, its bending in any case is not recommended. Bending is made sectional.
Also not subject to bending with the help of propelyene and bending particularly thick-walled and especially thin-walled tubes. These calculations are suitable for working with pipes of steel, brass, titanium, copper and plastic. If you have to do the bending of aluminum pipe, the unit deflection radius, from the data values incremented by 1, and to Dural, steel and chrome plated steel pipes - by 2.
Having established the parameters of tube, which must be subjected to bending, you can proceed to the design and manufacture of self-bending machine. It should be remembered, that the pressure profile on the formation of the bend should fall on its solid or convex side. Otherwise, the opposite side of the profile will gather in the folds.
Classification bending equipment
When planning independent production profilegiba and tube bender, should know, what kinds of equipment is divided. Bending machines of nonindustrial purpose, depending on the classification parameters are divided into the following types:
In accordance with the method of bending pipes
- the bowing pattern;
- the run of the lodgement.
The nature of mobility
- stationary - must be installed on a solid, stable support;
- portable - installed in any location due to the fact, that reaction does not occur on a support;
- wearable - suggest the possibility of using suspended due to lack of recoil.
Features profilegiba fabrication and bending tool with their own hands
For proper manufacturing profeligibochnogo or pipe bending machine with his own hands must be exactly on the bending effort find the dimensions of the frame parts. Usually, frame is made of steel, and structural. Need to know, what:
- the thickness of the metal parts of the bed no less 1/6 tube diameter, be bent;
- diameter of rollers – not less 3 diameter pipe under bending rental, using other means - not less than the allowable radius;
- shelf area, which will be made bed, must be chosen so, to be equal 3 pipe diameters, a channel shelf had not less than 2 diameters.
Methods of forming bends
Formation of bends can be done in different ways:. Each of them has its own characteristics. The formation of the bend by bending template is performed using a very simple bow-shaped bending. For its production need: a round piece of wood, rope, two solid rod, wire hook and calcined clean sand.
The essence of this method: sand packed tightly into a tube, obstukivaya it for better shrinkage hammer, and fasten rope strong rods. From the thus bent pipe sand take out using a wire hook. A significant drawback of this method: it is impossible to achieve perfect accuracy, as tangent vectors efforts directed toward the axis of the tube during bending.
The method of extruding is pressed without a matrix, with a punch. The matrix is a rigid support at the ends of the bend, submitted by rollers or swivel boots. In this case, the vector force perpendicular to the bent pipe. These curves are obtained perfectly accurate.
The above press profilegib made using the bench screw, used brake drum, pulley halves. Homemade machine looks like: in the grip of bore holes, they cut thread bolts and fix with a punch and a matrix. Bent place compress in a Vice – this is the essence of the method of pressing.
rolling process, as a way of bending the pipe - rather complicated at home. made yourself, this equipment works as follows:: desired location tube is pulled between the support rollers and the rotary punch. Such work is best done together: one follows the broaching, other regulatory and filing bevel.
For typical pipe bending roller combination bending and rolling. This way you can get good accuracy and productivity provided exclusively bending pipes, since somnet profile due to uneven pressure on the surface of the punch, and metal flow waves. It will also need to make great efforts and to have a certain skill work.
Given all these features, you can quite simply from the material at hand to build their own profilegib and tube bender.