外文翻譯切削刀具-wenkub
2022-11-13 08:05:56 本頁(yè)面
【正文】 rbide. It can work at very high temperatures, up to 800 degrees Celsius, which makes it ideal for highspeed machining without coolant. Pressurized air is remended to remove chips from the cutting zone. It works well on hardened steels, titanium and nickel alloys, as well as abrasive materials like cast iron and high silicon aluminum. When selecting end mill tools, the number of flutes, or cutting edges, is an important factor. The more flutes an end mill has, the smaller, or shallower, the flutes are. The solid center section of an end mill is approximately 52% of the end mill39。s major diameter. Threaded connections will not increase in strength if the contact length is more than times the diameter of the fastener. If you need threads that are deeper, machine tap them first and handtap them to finished depth. If you tap deeper than x the hole diameter, your chances of breaking the tap increase dramatically. Chip control bees a problem. When tapping blind holes, always drill as deep as possible to avoid packing chips below the tap. Using a spiral flute tap will bring the chips up, out of the hole. To further reduce tapping headaches, make sure all holes to be tapped are free of chips, and use a tapping fluid specifically designed for the type of material you are cutting. TIP: Tap drill size is the size of the hole required for a specific tap. For 75% effective threads the formula that will determine the correct drill size is: D – 1/N, whereD = major diameter of the tap and N = number of threads per inch A tapped hole with 75% of thread depth has only 5% less strength than 100% thread and takes only 1/3 of the cutting force of a 100% thread. END MILL An end mill is shaped similar to a drill, but with a flat bottom. It is used primarily to cut with the side of the tool to contour the shape of a workpiece. TIP: Programming an end mill to cut contour or pocket tool paths using cutter pensation (G41 and G42) allows you much more flexibility in adjusting the size of machined features. Using cutter pensation allows you to adjust the amount of stock removal. As an end mill wears, minor offset adjustments allow you to make every part the same size. You may also use a different size end and have the machine cut the same part features as with the end mill originally programmed for that tool path. BULL END MILLA bull end mill is the same as a regular end mill except that there is a radius on the corner where the flutes meet the bottom of the end mill. This radius can be any size up to onehalf of the tool39。 A blind hole is not cut entirely through a workpiece. Quite often, an engineering blueprint will specify a drilled hole to be drilled to full diameter depth. This means that the hole diameter must be a specified depth without regard to the angled tip of the drill. When you measure your tool length offset, you are measuring the length of the drill and its tip. So how deep do you drill the hole so that the full diameter depth is correct? Well, you need to know how long the drill point is. TIP: The length of the drill point is determined by the tool point angle and the drill diameter. You can calculate the length of t
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