The invention relates to a method for machining a workpiece, preferably of a gear, with a multiple thread worm-shaped cutting tool with several parallel running helical and ridge-shaped cutting edges. To obtain a higher quality of the machining operation the invention proposes the following steps for the method: a) Bringing the cutting tool with the workpiece into mesh by inserting of a first helical cutting edge of the cutting tool in a first gap of the workpiece which has to be machined or has to be produced and machining of the workpiece with the cutting tool in this contact situation; b) Bringing the cutting tool and the workpiece out of mesh; c) Bringing the cutting tool with the workpiece again into mesh by inserting of the first helical cutting edge of the cutting tool in a second gap of the workpiece which is different from the first gap and machining of the workpiece with the cutting tool.
B23F 11/00 - Fabrication de roues à vis sans fin, p. ex. par vis fraise
B23F 5/04 - Fabrication de dents d'engrenage droites, impliquant le déplacement d'un outil par rapport à la pièce à usiner avec un mouvement de roulage ou d'enveloppement par rapport aux dents à réaliser par meulage l'outil étant une vis sans fin
B23F 5/22 - Fabrication de dents d'engrenage droites, impliquant le déplacement d'un outil par rapport à la pièce à usiner avec un mouvement de roulage ou d'enveloppement par rapport aux dents à réaliser par fraisage l'outil étant une fraise-mère pour la fabrication de roues droites
2.
Method for dressing of a multiple thread grinding worm and for grinding and grinding worm
A dressing tool produces a plurality of first radial sections in a first flank of a first screw channel in a grinding worm, and a plurality of second radial sections in a second flank of a second screw channel in the grinding worm. Each radial section extends only a portion of a total radial height of the respective flank, the portion being less than the total radial height of the respective flank. Each first radial section in the first screw channel is radially displaced with respect to a corresponding second radial section in the second screw channel.
B24B 53/017 - Dispositifs ou moyens pour dresser, nettoyer ou remettre en état les outils de rodage
B23F 23/12 - Autres dispositifs, p. ex. porte-outilsDispositifs de vérification pour le contrôle des pièces à usiner dans les machines de fabrication de dents d'engrenage
3.
Method for the grinding of a profile of a workpiece
The invention relates to a method for the grinding of a profile (1) of a workpiece (2) with a gear or profile grinding machine (3), wherein the profile (1) which has to be ground is successively at first ground during a roughing operation with a roughing grinding tool (4) and is afterwards ground during a finishing operation with a finishing grinding tool (5), wherein a stock of the profile (1) which has to be removed is ground by the roughing and the finishing operation, wherein the roughing grinding tool (4) and the finishing grinding tool (5) are arranged coaxially on a common tool spindle (6) or on two separate tool spindles and wherein a translational movement is created between the grinding tools (4, 5) and the workpiece (2) in a direction of a first axis (x) for carrying out a grinding stroke. To improve the cost effectiveness and the quality of the grinding process the invention is characterized in that the at least one tool spindle (6) or the workpiece (2) is swiveled around an axis (A) of rotation which is directed in the direction of the first axis (x) by a predetermined angle (α) during the execution of the roughing operation or the finishing operation from a basic position (I) into a swivel position (II) in such a way that the grinding tool (5) which is not in operation can be passed over the profile (1) to be machined without collision.
The invention relates to a hard finish machine (1) for hard finishing of a workpiece (2), comprising at least two different hard finish tools (3, 4) which are arranged on a tool spindle (5), wherein the tool spindle (5) is arranged movable in the direction (Y) of its axis (6) on a tool carrier (7), wherein the tool carrier (7) is translational movable relatively to a machine bed (8) and wherein the hard finish machine furthermore comprises cooling lubricant supplying means (9) for the supply of cooling lubricant to the machining region between the workpiece (2) and the hard finish tool (2, 3). To work in all possible tool and method combinations with optimized cooling lubricant supply conditions the invention proposes that the cooling lubricant supplying means (9) comprise at least a first cooling lubricant nozzle (9′) having at least one opening for a stream of cooling lubricant and at least a second cooling lubricant nozzle (9″) having at least one opening for a stream of cooling lubricant, wherein the two cooling lubricant nozzles (9′, 9″) are arranged movable relatively to another in the direction (Y) of the axis (6) of the tool spindle (5).
B24B 7/00 - Machines ou dispositifs pour meuler les surfaces planes des pièces, y compris ceux pour le polissage des surfaces planes en verreAccessoires à cet effet
B24B 55/02 - Équipement pour refroidir les surfaces abrasives, p. ex. dispositifs d'alimentation en agent de refroidissement
5.
Hard finish machine for hard finishing of a workpiece
The invention relates to a hard finish machine (1) for hard finishing of a workpiece (2), comprising at least two different hard finish tools (3, 4) which are arranged on a tool spindle (5), wherein the tool spindle (5) is arranged movable in the direction (Y) of its axis (6) on a tool carrier (7), wherein the tool carrier (7) is translational movable relatively to a machine bed (8) and wherein the hard finish machine furthermore comprises cooling lubricant supplying means (9) for the supply of cooling lubricant to the machining region between the workpiece (2) and the hard finish tool (2, 3). To work in all possible tool and method combinations with optimized cooling lubricant supply conditions the invention proposes that the cooling lubricant supplying means (9) comprise at least one nozzle element (10), wherein the nozzle element (10) comprises a nozzle chamber (11), wherein the nozzle chamber (11) is limited by two facing wall elements (12, 13) which define a stream exit opening (14) for the cooling lubricant and wherein at least one of the wall elements (12, 13) is arranged movable for the variation of the stream exit opening (14).
B24B 7/00 - Machines ou dispositifs pour meuler les surfaces planes des pièces, y compris ceux pour le polissage des surfaces planes en verreAccessoires à cet effet
B24B 55/03 - Équipement pour refroidir les surfaces abrasives, p. ex. dispositifs d'alimentation en agent de refroidissement conçus comme équipement complet d'alimentation en agent de refroidissement ou de clarification de celui-ci
6.
Method for the operation of a gear or profile grinding machine and gear or profile grinding machine
The invention relates to a method for the operation of a gear or profile grinding machine (1) for the grinding of pre-geared or pre-profiled workpieces (2), wherein the machine comprises at least one tool spindle (3) which can carry at least one grinding tool (4) and wherein the machine comprises at least two workpiece spindles (5, 6) which can at least temporarily be driven to the tool spindle (3) for cooperation of the workpiece (2) with the grinding tool (4). To improve the ratio between primary processing time and secondary processing time the invention proposes that the at least two workpiece spindles (5, 6) are pivoted around a respective axis of rotation (7, 8) for transportation from a grinding position (I) to a loading station (II) and vice versa, wherein the rotation of the two workpiece spindles (5, 6) takes place independently from another. Furthermore, the invention relates to a gear or profile grinding machine.
The invention relates to a method for the production of a rotor of a rotary screw compressor (1) with a cylindrical basic shape, which has a helical profile (2) at its outer circumference, wherein the method comprises the steps of: a) Pre-processing of the workpiece (1) by bringing in the profile (2), wherein the profile (2) has a stock compared with the finished shape, b) Pre-grinding of the profile (2) by a rough-machining process in a grinding machine, wherein a part of the stock is removed and c) Finish-grinding of the profile (2) by a finish-machining process in the grinding machine, wherein the remainder of the stock is removed and the finished shape of the profile (2) is produced. To improve the efficiency of the production especially of rotors of rotary screw compressors and ensure a high quality of the production the invention is characterized in that the pre-grinding and/or the finish-grinding is carried out with a grinding worm (3) by a continuous generative grinding process.
B24B 5/04 - Machines ou dispositifs pour meuler des surfaces de révolution des pièces, y compris ceux qui meulent également des surfaces planes adjacentesAccessoires à cet effet possédant des pointes ou des mandrins pour maintenir la pièce pour meuler extérieurement des surfaces cylindriques
B24B 19/02 - Machines ou dispositifs conçus spécialement pour une opération particulière de meulage non couverte par d'autres groupes principaux pour meuler des gorges, p. ex. sur des arbres, dans des gaines, des tubes, des éléments de joint homocinétique
The invention relates to a hard finishing machine (1). The machine has one tool (4) which is arranged on a tool spindle (3) and a rotary table (5) with an axis of rotation (6) which is aligned vertically, and a workpiece spindle (7) arranged on the rotary table (5) which carries the workpiece (2). To increase the flexibility of the machine, the rotary table (5) has a first rotational position (I) in which the workpiece (2) can be machined by the tool (4), a second rotational position (II) where the workpiece is loaded on the workpiece spindle (7) at a first station (8), and a third rotational position (III) where the workpiece is unloaded at a second station (9).
B24B 9/02 - Machines ou dispositifs pour meuler les bords ou les biseaux des pièces ou pour enlever des bavuresAccessoires à cet effet caractérisés par le fait qu'ils sont spécialement étudiés en fonction des propriétés de la matière propre aux objets à meuler
The invention relates to a grinding machine for grinding of a gear or of a gear-like workpiece, which has a grinding worm (1) with a tooth-shaped profile (2), which consists at least partly from a dressable abrasive material and which is arranged rotatably on a grinding spindle, so that it can rotate around an axis of rotation (C) during grinding and a dressing device (3), with which at least a part of the forming areas (4, 5) of the grinding worm (1) can be profiled, wherein the dressing device (3) has a dressing spindle (6), which bears a disk-shaped dressing tool (7), so that it can rotate around an axis of rotation (B). To allow a faster dressing of the grinding worm the invention is characterized in that the grinding machine further has a dressing bar (8) which has a dressing edge (9), wherein the form of the dressing edge (9) corresponds at least partly to the ideal envelope of the grinding worm (1).
The invention relates to a method and machine for the dressing of a grinding tool (1), which has at least one tooth-shaped profile (2) with a first flank (3) and an opposing second flank (4). A disk-shaped dressing tool (5) used for dressing of the grinding tool (2) has a first abrasive area (6) and a second abrasive area (7). To allow a faster and thus more economical dressing of the grinding tool, the first abrasive area (6) contacts the first flank (3) and the second abrasive area (7) contacts the second flank (4) simultaneously, and the disc-shaped dressing tool (5) and/or the grinding tool (1) are pivoted relatively to another around an axis (A) being arranged perpendicular to the axis of rotation (C) of the grinding tool (1), so that both flanks (3, 4) are dressed simultaneously.
brevets