Milling basics

14 5月 2018 | 没有评论 | posted by admin | in Article

finishing
The main consideration in finish machining is the surface quality of the workpiece rather than the amount of chips. A small depth of cut is usually used for finishing. The secondary cutting edge of the tool often has a special shape, such as a wiper. According to the machine tool, cutting method, workpiece material and the tool used, the surface roughness can reach the level of Ra1.6μm, even under excellent conditions, it can reach Ra0.4μm.
The amount of wear on the tool flank during finishing is no longer the main criterion, it will give the surface quality of the workpiece

Diamond-coated cutters have different life spans

12 5月 2018 | 没有评论 | posted by admin | in Article

The
As with any other tool, the life of diamond-coated tools varies, depending on the material being cut, the feed rate and cutting speed selected, and the geometry of the workpiece. In general, diamond-coated cutters for processing graphite are 10-20 times longer than uncoated carbide cutters and may even be longer in some cases. In this way, you can use a single tool to perform almost any machining task, without the need for tool change due to tool wear, to avoid machining interruptions and recalibration, which makes it possible to achieve unattended processing. It is also entirely possible to obtain long tool life in the processing of composite materials.

Cast iron cutting characteristics

11 5月 2018 | 没有评论 | posted by admin | in Article

In general, the higher the hardness and strength of the cast iron, the lower the metal cutting performance and the lower the expected life from the blade and the tool. Most of the types of metal cutting performance for cast iron used in metal cutting production are generally good. The metal cutting performance is related to the structure, and the harder pearlite cast iron is also more difficult to process. Flaky graphite cast iron and malleable cast iron have excellent cutting properties, and ductile cast iron is rather poor.

The main types of wear encountered when machining cast iron are: Abrasive, adhesive, and diffuse wear. Abrasions are mainly caused by carbides, sand inclusions, and hard cast skins. Adhesive wear with built-up edge occurs at low cutting temperature and cutting speed conditions. The ferrite portion of cast iron is most easily welded to the blade, but this can be overcome by increasing the cutting speed and temperature.