In this article we will help you to understand the technology of ventilation duct production, explain the purpose and principles of the machines and equipment for sheet metal processing. This manual will outline the sequence of manufacturing the main components of ventilation systems of circular and rectangular cross-section.
Cutting and working with blanks
In the manufacture of duct line blanks with rectilinear and curvilinear contours are used, depending on the manufactured part. Billets with curvilinear contours include bends, transitions, crosses, taps, plugs and many other parts.
- Every ventilation system manufacturer uses hand scissors of various designs. You cannot do without them.
- It is possible to increase productivity by using electric hand scissors for metal.
- In the production of chimneys, plugs, taps, caps and other products in which it is necessary to cut circular holes or cut a large number of rings are used as machine tools for cutting circles.
Preparation of locking joints
The most common machine for forming locking joints on the duct workpieces, both round and rectangular sections is a folding machine. Each ventilation shop must be equipped with a bending machine for bending a single standing seam by hand. This machine is very much in demand to increase the productivity of small parts of elbows, tees, elbows, etc.
Round duct bending
For radius bending duct parts use three-roll bending machines – sheet rollers. Rounding of blanks for ventilation is carried out on rolls with asymmetric location of rollers. The drive of this machine can be both manual and motorized. The design of this sheeter is best suited for quick adjustment of the diameters of bent pipes and workpieces. Adjustment of the lower front roll is made with one lever, i.e. the operator does not need to make unnecessary movements along the sheeter. Rear roller is also adjusted with a single adjuster.
Shrinkage of the lock on the ducts
After shaping the locks and preparing the ducts, the edges of the locks must be securely connected so that the duct will not open and allow smoke or exhaust air to escape. You can find the most common types of locks and the equipment used online.
Assembly of elbows, segmental bends, taps, fittings
Elbow bending machines in the shop is necessary for the established production of corrugated elbows. Elbow bends are made from billet metal, which is a round tube of a given length. With the help of bending elbows on a round billet of thin sheet metal is made bending, a strictly defined angle. Corrugated bending angle depends on the total number of corrugations.
Machines for corrugated bends work accurately and do not allow mechanical damage on the workpiece. The versatility of bending is that the size of corrugated bends can vary. That is, one bending machine can produce corrugated bends of different standard diameters. You can find a lot of different equipment here.
Machine for the assembly of segmented bends
This machine is a high-performance machine for the fabrication of segmented bends, half-bends, transitions, floor transitions, deflectors and circular plugs. The machine forms and settles a standing seam between components of elbows with a high degree of density, which gives a high quality shaped part. As a result of using the machine for the assembly of segmented bends ventilation duct manufacturers get a quality piece with excellent appearance and rigidity.