Patent MX-2016016580-A (MX)
Title: Method for incorporating undercuts in tooth flanks of teeth of toothed wheels.
Inventor: MARCEL SOBCZYK
IPC: B23F5/16
Filed: 2015-03-18
Abstract: The invention relates to a machine tool and a method for incorporating undercuts in left and right tooth flanks (4, 5) of teeth (3) of a toothed gear blank (1) by hob peeling, wherein the gear blank (1) and a cutting wheel (11) arranged at a crossed-axes angle to the gear blank (1), said cutting wheel comprising cutting teeth (13) with right and left cutting edges (14, 15), are continuously rotationally driven at a fixed speed ratio, the cutting teeth (13) mesh with the tooth flanks (4, 5) in a manner that removes shavings and the feed has at least one movement component in the direction of extension of the teeth (3). In order to be able to machine obliquely toothed workpieces with the method, it is proposed that in each of two consecutive machining steps the left tooth flanks (4) are machined by a differential and/or tangential feed component in the left rotational direction (L, TL) with the left cutting edges (14) of the cutting teeth (13) and right tooth flanks (5) are machined by a differential and/or tangential feed component in the right rotational direction (R, TR) with the right cutting edges (15) of the cutting teeth (13). The invention relates to a machine tool and a method for incorporating undercuts in left and right tooth flanks (4, 5) of teeth (3) of a toothed gear blank (1) by hob peeling, wherein the gear blank (1) and a cutting wheel (11) arranged at a crossed-axes angle to the gear blank (1), said cutting wheel comprising cutting teeth (13) with right and left cutting edges (14, 15), are continuously rotationally driven at a fixed speed ratio, the cutting teeth (13) mesh with the tooth flanks (4, 5) in a manner that removes shavings and the feed has at least one movement component in the direction of extension of the teeth (3). In order to be able to machine obliquely toothed workpieces with the method, it is proposed that in each of two consecutive machining steps the left tooth flanks (4) are machined by a differential and/or tangential feed component in the left rotational direction (L, TL) with the left cutting edges (14) of the cutting teeth (13) and right tooth flanks (5) are machined by a differential and/or tangential feed component in the right rotational direction (R, TR) with the right cutting edges (15) of the cutting teeth (13). The invention relates, in particular, to a method for detecting a short circuit, in particular a creeping short-circuit, in the power system of a motor vehicle, in particular of a two-wheeled or four-wheeled motor vehicle. The method according to the invention has the following steps: determining a first electrical power strength in at least a first power section of the electrical power system. Applying a first change in voltage, in particular an abrupt change in voltage or a first voltage jump, at least to the first power section of the power system. Determining a second electrical power strength which is increased with respect to the first electrical power strength on the basis of the first change in voltage in the at least first power section in relation to the application of the first change in voltage to the first power section of the power system. Comparing the increase in the electrical power strength in the at least first power section with a second predetermined threshold value, and switching off at least the electrical current with the first electrical power strength at least in the first power section of the electrical power system if the second predetermined threshold value is exceeded.