Production Machining

DEC 2018

Production Machining - Your access to the precision machining industrial buyer.

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Page 40 of 51

:: The one-step finishing process of the lateral surface and the concave shape of the plane surface is performed using a Mini 114 axial grooving tool. 1 2 3 4 5 Tight design and concentricity tolerances, required surface quality and thin walls for the design are some challenging factors present during the turning process for the housing cover. To meet the challenge of clamping this thin-walled part on a Mori Seiki NL 1500 lathe, a three-jaw chuck with custom-designed milled aluminum segments was used. Because of the concave shape and the 1-mm thick internal profile, the clamping pressure of the three-jaw chuck has to be be adjusted when clamping the large diameter section of the compo- nent to turn the part. Horn's Technical Consultant, Michael Götze, chose the TH35 coated carbide grade for the Supermini Type-105 system's boring bar insert, which is a TiAlN coated grade. Because of its low coefficient of friction, this coating is well suited for the machining of aluminum materials and thus prevents the formation of built-up edges. The machining process of the housing cover is as follows (see Figure 1): The first step consists of the rough turning of the inner diameter (1) with a Supermini :: The Supermini 105 machines a 1-mm internal groove. :: Horn's Technical Consultant Michael Götze (left) has been supporting Herrman CNC-Drehtechnik for many years. :: 39 Turning Thin-Walled Aerospace Parts :: Fig. 1. This technical drawing illustrates the housing cover made of high-tensile aluminum that is used on the landing gear of the Airbus A350.

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