外文翻譯切削刀具-文庫(kù)吧資料
2024-11-10 08:05本頁(yè)面
【正文】 1. SFM = (cutter diameter [in.]) * RPM * / 12 2. (Chip load [in.]) = (feed [in. per min.]) / RPM / of flutes 3. (Feed [in. per min.]) = RPM / (thread pitch) With all three equations, you may enter all but one of the values and the control will pute and display the remaining value. To calculate the horsepower required for a cut, you must enter values for RPM, feed rate, number of flutes, depth of cut, width of cut, and choose a material from the menu. If you change any of the above values, the calculator will automatically update the required horsepower for the cut you intend. The next thing to consider when choosing cutting tools for a job is what material you are going to cut. The most mon materials cut in the metalworking industry can be divided into two categories: nonferrous and ferrous. Nonferrous materials include aluminum and aluminum alloys, copper and copper alloys, magnesium alloys, nickel and nickel alloys, titanium and titanium alloys. Common ferrous materials include carbon steel, alloy steel, stainless steel, tool steel, and ferrous cast metals like iron. Nonferrous metals are softer and easier to cut, with the exception of nickel and titanium. Ferrous metals, on the other hand, are generally harder in position and tougher to cut. Cutting tool material is one of the biggest decisions you39。s diameter. TIP: Bull end mills are effective for producing a corner radius between a wall and a floor on a given part feature. They also add to the strength of an end mill. When machining hard, tough to cut materials, the sharp corners on a standard end mill tend to chip and wear faster than an end mill with a corner radius. The radius on a bull end mill provides a more gradual shearing entry in to the work piece. BALL END MILLA ball end mill is a bull end mill where the corner radius is exactly 1/2 the tool39。t affect the size of the hole, the appearance of the hole may be rejected by some customers. TAP A tap is used to create screw threads inside of a drilled hole. NOTE: Great care must be taken when using a milling machine to perform a tapping operation. TIP: If you are using a machine with rigid tapping, feedrate (in inches per minute) = thread pitch x revolutions per minute. Also, you should never tap more than x the tap39。 the value of the constant depends on the drill point angle (most standard highspeed steel drills have a tool point angle of 118 degrees). For a drill point angle of: 118 degrees 135 degrees 141 degrees Multiply the drill diameter by: Using these constants allows you to calculate the drill point length within a few thousandths of an inch. CENTER DRILLA center drill is a small drill with a pilot point. It is used to create a small hole with tapered walls. When a hole39。英文原文CUTTING TOOLS When selecting cutting tools for a job, the first thing to consider is what type of operation needs to be performed. Here is a quick description of the basic cutting tools most often used in milling operations. DRILL A drill is used to create a round, cylindrical hole in a workpiece. Drilled holes can be through holes o
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