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Economical Gantry Flame Cutting Machine
1.International advanced software and hardware technologies make it a multi-functional, high precision, superior performance and reliable portable CNC cutting equipment.
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The Bota BDLM Gantry CNC Oxy-Fuel & Plasma Cutting machine is a highly versatile machine for oxy-fuel cutting and plasma. All processes are controlled from the Bota CNC system. This feature packed controller uses a color-coded graphical user interface, making it easy to learn, and easy to operate. Programs can be generated from the built-in shape library, loaded by network connection, USB port. Reliability is ensured by the control’s solid-state disk drive and robust industrial operating system.
Oxy-fuel cutting is a process that utilizes oxygen and fuel gases in order to cut metals. In today’s manufacturing, it is primarily used for cutting thicker carbon steel (above 1 or 2”), where it provides faster cutting speeds with a low investment cost.
Plasma cutting, although it is not a new technology, is one of the most efficient and productive methods for manufacturers who want to provide their customers with high quality results. Plasma cutting utilizes highly energized gases in an ionized and electrically conductive state.or write your questions bellow this video.
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What is HOLLOW STRUCTURAL SECTION? What does HOLLOW STRUCTURAL SECTION mean? HOLLOW STRUCTURAL SECTION meaning – HOLLOW STRUCTURAL SECTION definition – HOLLOW STRUCTURAL SECTION explanation.
Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
A hollow structural section (HSS) is a type of metal profile with a hollow tubular cross section. The term is used predominantly in USA, or other countries which follow US construction or engineering terminology.
HSS members can be circular, square, or rectangular sections, although other shapes are available, such as elliptical. HSS is only composed of structural steel per code.
HSS is sometimes mistakenly referenced as hollow structural steel. Rectangular and square HSS are also commonly called tube steel or structural tubing. Circular HSS are sometimes mistakenly called steel pipe though true steel pipe is actually dimensioned and classed differently from HSS. (HSS dimensions are based on exterior dimensions of the profile, while pipes are essentially dimensioned based on interior diameters, as needed to calculate areas for flow of liquids.) The corners of HSS are heavily rounded, having a radius which is approximately twice the wall thickness. The wall thickness is uniform around the section.
In the UK, or other countries which follow British construction or engineering terminology, the term HSS is not used. Rather, the three basic shapes are referenced as CHS, SHS, and RHS, being circular, square, and rectangular hollow sections. Typically, these designations will also relate to metric sizes, thus the dimensions and tolerances differ slightly from HSS.
HSS, especially rectangular sections, are commonly used in welded steel frames where members experience loading in multiple directions. Square and circular HSS have very efficient shapes for this multiple-axis loading as they have uniform geometry along two or more cross-sectional axes, and thus uniform strength characteristics. This makes them good choices for columns. They also have excellent resistance to torsion.
HSS can also be used as beams, although wide flange or I-beam shapes are in many cases a more efficient structural shape for this application. However, the HSS has superior resistance to lateral torsional buckling.
The flat square surfaces of rectangular HSS can ease construction, and they are sometimes preferred for architectural aesthetics in exposed structures, although elliptical HSS are becoming more popular in exposed structures for the same aesthetic reasons.
In the recent past, HSS was commonly available in mild steel, such as A500 grade B. Today, HSS is commonly available in mild steel, A500 grade C. Other steel grades available for HSS are A847 (weathering steel), A1065 (large sections up to 50 inch sq made with SAW process), and recently approved A1085 (higher strength, tighter tolerances than A500).
Square HSS is made the same way as pipe. During the manufacturing process flat steel plate is gradually changed in shape to become round where the edges are presented ready to weld. The edges are then welded together to form the mother tube. During the manufacturing process the mother tube goes through a series of shaping stands which form the round HSS (mother tube) into the final square or rectangular shape. Most American manufacturers adhere to the ASTM A500 or newly adopted ASTM A1085 standards, while Canadian manufacturers follow both ASTM A500 and CSA G40.21. European hollow sections are generally in accordance with the EN 10210 standard.
HSS is often filled with concrete to improve fire rating, as well as robustness. When this is done, the product is referred to as a “Lally column” after its inventor John Lally of Waltham, Massachusetts. However, the pronunciation is often corrupted to “lolly column”. For example, barriers around parking areas, bollards, made of HSS are often filled, to at least bumper height, with concrete. This is an inexpensive (when replacement costs are factored in) way of adding compressive strength to the bollard, which can help prevent unsightly local denting, though does not generally significantly increase the overall structural properties of the bollard.