1439 Каталог KENNAMETAL 2013 Инструментальная оснастка для металлорежущих станков Стр.M39

Каталог KENNAMETAL 2013 Инструментальная оснастка Стр. M39 1439 Lab2u

Kennametal Technical Information KM Application Data Operating Conditions (continued) IMPORTANT Information shown on the following charts was developed exclusively for use with KM tooling in static conditions. Do not use for any other tooling system because the results will not apply. To account for cutting force fluctuations in dynamic conditions, a reduction of 20-30% should be applied to the loads shown in charts. The following example illustrates how to use Charts 1, 3, 5, 7, and 9 Given: KM40 integral shank boring bar, ordering code KM40TS-S32G-MCLNR12 Dimensions: KM40 integral shank boring bar, ordering code KM40TS-S32G-MCLNR12 L1 = 90mm, F = 22mm Required: What is maximum permissible tangential load Solution: To determine the tangential load: a) Determine the correct chart to use. (This is a KM40 tool, so use Chart 3). b) Find the intersection point of the two lines that correspond to the dimensions L1 = 90mm, F = 22mm. These two lines intersect just above the 6670 N (1500 lbs) curve. c) The permissible tangential load is the approximate load at the point of intersection. The point of intersection is at approximately 6890 N (1550 lbs). As you can see from the calculation, the actual value is 6790 N (1528 lbs). Small variations are to be expected from reading the approximate location on the chart but should be inconsequential. Safe cutting conditions are achieved when the actual tangential load that is being put on the KM tooling does not exceed the maximum permissible tangential force. To help you determine the approximate value of your actual tangential force, Charts 2, 4, 6, and 8 have been developed (pages K26-K35). They show the relationship between depth of cut and feed rate at various tangential forces. They are recommended when using standard CNMG and TNMG insert geometries to machine plain carbon steels (AISI 1000 series), most alloy steels (AISI 4000 series), and some tool and stainless steels (H11, 316). The following example illustrates how to use Charts 2, 4, 6, 8, and 10 Given: KM40 integral shank boring bar, ordering code KM40TS-S32G-MCLNR12 feed rate: 0.016 IPR depth of cut: .200" (doc) Required: What is approximate tangential force Solution: To determine the tangential force: a) Determine the correct chart to use. (This is a KM40 tool, so use Chart 4). b) Find the intersection point of the two lines that correspond to the 0.016 IPR feed rate and the .200" doc. c) The approximate tangential force is the force at the point of intersection. The point of intersection is at approximately 4450 N (1000 lbs). Please remember that these are approximate values and should be used only as a reference. If there is any doubt whether these charts are accurate enough, the actual cutting force should be calculated. These charts were designed to determine conditions within the limits of the various KM tooling system sizes. However, in actual cutting conditions, there are many other limitations, such as insert strength or excessive overhangs, that may limit the cutting forces to values far lower than those represented in the charts. Kennametal M39 Technical Information