Sand belt treatment of surface drawing process

The wire drawing process is a process of repeatedly scraping lines on the surface of a workpiece by using sandpaper, abrasive tape, industrial scouring pad or other forms of abrasive material. Drawing is a physical surface treatment process that is a permanent, destructive, irreversible process. There are many wire drawing products that we come into contact with every day, such as the outer casing of electronic products, home appliances, and the metal appearance surface under the sides of the elevator.

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Classification of wire drawing process

The wire drawing process is classified according to the effect, and can be mainly divided into straight lines and broken lines. Straight lines are also called hairline patterns. In the consumer electronics industry, the home appliance industry is more popular. The straight grain texture is clear, light and dark, and the hand touch has a concave and convex feeling. The broken lines are also called snow patterns, chaotic lines, vibrating lines, swing patterns and so on. The texture is smooth, the lines are short, and the lines are patchwork. The two lines have their own merits, and the choice has great subjectivity.

Several factors affecting the drawing effect

First, the abrasive grain produced by abrasive belts, sandpaper, industrial scouring pads, etc. The same type of abrasive belt, the thicker the grain size, the deeper the drawn line, 120#-400# is the drawing process particle size that is often used.

Second, the types of wire drawing materials: abrasive belts, industrial scouring pads, etc. The coarse-grained abrasive belt is suitable for drawing a deeper and more effective line drawing process. If you use 80#, 60# or even thicker sanding, the drawing is very obvious, but at the same time there will be obvious burrs, which are more likely to be tied. Industrial scouring pad can be used for hand drawing, attaching a suitable size of scouring pad to the support, and then manually drawing it back and forth, suitable for small workpieces and workpieces with certain shapes.

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Third, the workpiece material will also affect the drawing effect. For example, stainless steel plate drawing and aluminum drawing process, even if the same belt is used, the same machine, the same parameters, the effect is very different. If you want to get a very obvious drawing process on the surface of stainless steel workpieces, you will generally choose a coarser-grained abrasive belt, or a harder, more sharp sand.

Four, hand drawing and mechanical drawing two different drawing methods. Hand-drawing for small workpieces, industrial scouring pads are generally used. This drawing efficiency is low and the line effect is unstable, so the mainstream is mechanical drawing. Mechanical drawing is mainly divided into flat-type abrasive belt drawing, contact-type abrasive belt drawing, and non-woven roller drawing. The flat-pressed wire drawing is relatively continuous and relatively long, and the surface to be drawn may not have any bumps. Contact wire drawing is point, line contact, not face contact. Non-woven roller drawing is suitable for processing some curved workpieces, resulting in less heat, which is cold-worked.

In summary, the use of abrasive belts for the treatment of the surface drawing process is a process that is complicated and has a certain technical difficulty. How to use the abrasive belt, sandpaper, industrial scouring pad and other abrasive materials, machinery and equipment, how to set the grinding parameters, etc. is the difficulty of drawing the drawing process