Abstract:
A method and apparatus for determining the angular position of a workpiece and for positioning the same relative to at least one tool. The workpiece has at least one set of teeth. Pulses are derived from a rotating reference workpiece and from a reference shaft which has a known gear ratio with the reference workpiece, and consequently also turns. A first phase measurement is undertaken between the pulses, the result of which is stored as the reference value. The reference workpiece is replaced with a workpiece which is to be machined and which is provided with teeth. A second phase measurement between the pulses of the refernece shaft and of the reference workpiece are undertaken in a second measuring operation. The reference value of the first phase meaasurement is compared with the result of the second phase measurement. The workpiece is turned relative to the reference shaft in conformity with the difference between the two measured values.
Abstract:
A gear grinding tool can be trued and re-profiled. The geometry of the individual profiles in the direction of the tool axis is designed so that at least more than two, preferably all, flanks of the tool are used for rough machining of the work piece flanks, and that during finishing the re-profiled flanks provided only for roughing are set back far enough so that during finishing they do not come into contact with the work piece flanks.
Abstract:
The invention concerns a method of machining the tooth flanks of substantially cylindrical, but crowning-modified gears through a diagonal generating process employing a worm-shaped tool which is modified with a crowning in the direction of its rotary axis, wherein the crowning can be positive or negative (concave crowning), wherein by matching the crowning of the tool to the diagonal ratio, a flank twist is generated by means of the tool and superimposed on the natural flank twist, such that the result of said superposition equals the flank twist required for the work piece.
Abstract:
The method is used for machining flanks of unhardened or hardened, spur-toothed or helical-toothed, internally toothed or externally toothed cylindrical gears by skiving. Basic rotation is produced between a tool and a workpiece. In addition, a helical motion between the tool and the workpiece is produced. The relative motion between the tool and the workpiece is executed with high accuracy, and any variations in the relative motion are corrected. The tooth number z.sub.0 of the tool, for minimizing the effect of the variations of the tool and its mounting, is fixed in such a way that, in the case of z.sub.0 .gtoreq.z.sub.2 (z.sub.2 is the tooth number of the workpiece, z.sub.0 is the tooth number of the skiving tool), the ratio i=z.sub.0 /z.sub.2, and in the case of z.sub.0 >z.sub.2, the reciprocal of the ratio 1/i=z.sub.2 /z.sub.0, result in an integral value or the ratio of two integral numbers, the amount of which is as small as possible.
Abstract:
By coordinating the amount and course of the crowning of the tool and the diagonal ratio, a twist is created with a simple tool, and superimposed on the natural twist, thus resulting in the twist required for the work piece. Furthermore, an additional portion of the crowning is superimposed on the portion of the crowning of the work piece which is the result of the crowning of the tool during the machining in the diagonal method, thus resulting in the required crowning of the work piece, with the additional portion of the crowning being generated by changing the spacing between tool and work piece during the machining.
Abstract:
A process for the discontinuous profile grinding or milling of gear wheels with wheel-type or shank-type tools which includes setting approximate parameters for the workpiece to be worked by the tool so as to avoid large profile deviations, determining by calculation or trial the profile of the workpiece following work thereon, comparing the work profile with the predetermined profile of the finished workpiece, and resetting the parameters as necessary to correspond the actual work profile with the required profile for the workpiece.
Abstract:
By coordinating the amount and course of the crowning of the tool and the diagonal ratio, a twist is created with a simple tool, and superimposed on the natural twist, thus resulting in the twist required for the work piece. Furthermore, an additional portion of the crowning is superimposed on the portion of the crowning of the work piece which is the result of the crowning of the tool during the machining in the diagonal method, thus resulting in the required crowning of the work piece, with said additional portion of the crowning being generated by changing the spacing between tool and work piece during the machining.
Abstract:
A method of machining cylindrical gears with internal or external gearing on a machine with a tool wherein a gear is positioned on a machine, the gear having an axis of rotation (D). The gear is then evaluated to establish a gear guiding axis (F) and the position of the gear guiding axis (F) relative to the axis of rotation (D) is determined. The gear is machined by displacing the tool in the direction of the gear guiding axis (F).
Abstract:
Desired crown width and offset can be obtained on the workpiece in a simple manner and with geometrically simple tools, by adjustment of tool lead modification, the axial spacing between tool and workpiece, or the angle of rotation. Tooth flanks modified to be broad-crowned can be produced with virtually any offsets in the one-flank or two-flank process. Theoretically exact results are obtained even after shifting of the tool, and the active tool length required for machining a workpiece may be freely selected over a wide range.
Abstract:
A method for shaving and shave grinding tooth flanks of cylindrical workpiece gear wheels, especially, flank-line modified gear wheels, and for profiling tools needed for shave-grinding cylindrical workpiece gear wheels. During the machining of gear wheels, certain areas of the gear wheel need to be machined more so than other areas, meaning that some areas require more material to be removed than other areas. As a result, certain areas of the tool are not uniformly worn, but rather the area of the tool which removes the most material is worn more quickly than other areas of the tool. Similarly, if certain areas of the gear wheel are harder than other areas, the tool performing the actual machining will wear at a corresponding rate. The present invention avoids such non-uniform wear by providing greater areas of cutting surface on the tool performing the actual machining in the positions which are required to remove the most material, or which are required to machine the hardest surfaces of the workpiece.