The invention relates to a pressing tool for a large gear hob. The pressing tool comprises a base, wherein a center shaft which extends vertically upward is fixedly arranged on the base, the lower end of the center shaft is movably sleeved with a support sleeve, the upper end of the center shaft is movably sleeved with a press block, a space interval for instilling a workpiece is reserved between the support sleeve and the press block, the lower end of the support sleeve is fixed with the periphery of the base, a locating seam allowance which is used for centering the workpiece is arranged at the upper end of the support sleeve, a hydraulic nut is connected to an axial section, above the press block, of the center shaft through threads, and the hydraulic nut presses the press block. The pressing tool for the large gear hob is suitable for pressing the workpiece when the operation space is small and the hob is effectively and heavily cut, and enough clamping pressing force and clamping efficiency can be effectively guaranteed.

Pressing tool for large gear hob

The invention relates to a cycloidal gear bearing hole grinding tool and a usage method thereof and belongs to the technical field of machining. The tool includes a base with a hollow lower part. A buckle cover-shaped elastic membrane sheet is fixed on the base, and a pull-down cylinder is disposed on the hollow part of the base; a tie rod of the pull-down cylinder is pressed on the center of theupper surface of the elastic membrane sheet through a pressing block; the elastic membrane sheet is provided with annular centering convex plates; the centering convex plates are embedded in arc-shaped grooves to achieve fixation connection, and shapes of the arc-shaped grooves match the bottoms of three plane support claws and three excircle clamping jaws that are petal-shaped and uniformly distributed in a circumference interval manner; the upper surfaces of the plane support claws support a to-be-grinded cycloidal gear; and the upper surface central parts of the excircle clamping jaws are provided with profiling positioning teeth that match the to-be-grinded cycloidal gear. According to the cycloidal gear bearing hole grinding tool and the usage method thereof, the positioning precisionis improved, various paired grinding disadvantages are avoided, the grinding quality is greatly improved, and the uniformity of the efficiency and processing precision is improved.

Cycloidal gear bearing hole grinding tool and usage method thereof

The invention discloses a triangular chuck for gear machining. The triangular chuck for gear machining comprises a chassis, a central hole, collets, puller bolts, locking nuts, threaded holes, fixture blocks and fixture block grooves, wherein the chassis is circular; the central hole is formed in the middle; collets, which are triangularly distributed, are arranged on the top of the chassis; the puller bolts are arranged on the tail parts of the collets and extend into the collets through the threaded holes formed in the collets; the locking nuts are arranged on the puller bolts; the fixture lock grooves are arranged at one ends, extending into the central hole, of the collets; the fixture blocks are arranged in the fixture block grooves; and the fixture blocks are connected to the puller bolts extending into one ends of the collets. The triangular chuck for gear machining is good in fastening effect to the gear, and meanwhile, the gear is convenient to assemble and disassemble, so that the machining efficiency is favorably improved; and the triangular chuck for gear machining is simple in structure, reasonable in design and low in manufacturing cost, and is favorably realized.

Triangular chuck for gear machining

The invention discloses a gear spherical surface grinding fixture comprising a flange and a chuck which are fixedly connected, wherein the chuck is provided with a revolution surface rotating around a central axis; a plurality of locating pieces are uniformly distributed on the circumference of the revolution surface; and each locating piece is composed of a locating pin for locating an inner hole of a gear and a locating step for locating the end surface of an aspherical surface of the gear The gear spherical surface grinding fixture is characterized in that a plurality of radial through holes are uniformly distributed in the circumference of the revolution surface of the chuck; the locating pieces are vertically slidably arranged in the radial through holes and are locked and fixed by using locking screws; axial through holes are formed in the locating pieces; regulating screw rods are rotationally arranged in the axial through holes; the bottoms of the radial through holes are provided with threaded holes corresponding to the regulating screw rods; and the regulating screw rods are in threaded rotational connection with the threaded holes The gear spherical surface grinding fixture is specially used for turning gear spherical surfaces and is high in universality

Gear spherical surface grinding fixture

The invention discloses a hobbing method for multiple outer gear rings. The hobbing method is characterized by comprising the following steps: step a, arranging a press fitting tool on a press machine; step b, installing an upper press fitting positioning sleeve and a lower press fitting positioning sleeve on a lower press fitting sleeve, sleeving the lower press fitting positioning sleeve with a lower gland, controlling a pressure head of the press machine to move downwards, pressing an unprocessed outer gear ring on the lower press fitting positioning sleeve onto the lower press fitting sleeve, pressing a machined outer gear ring on the lower press fitting sleeve to a lower positioning seat; step c, sequentially removing the lower gland, the lower press fitting positioning sleeve and the lower press fitting sleeve; step d, installing the lower press fitting sleeve with the unprocessed outer gear ring onto a rotataion table of a hobbing machine; and step e, after the hobbing is completed, removing the lower press fitting sleeve with the machined outer gear ring from the hobbing machine, and repeating the steps b to d. By adopting the hobbing method, 8 to 10 outer gear rings can be machined in one step, so that the hobbing efficiency can be greatly improved, and the defect that the machining efficiency of a single workpiece is low in the prior art can be well overcome.

Hobbing method for multiple outer gear rings

A tool for gear shaping of an outer gear ring comprises a base body, a diameter adjusting shaft, a hydraulic cylinder and a plurality of gear ring fixing mechanisms. A through hole is formed in the middle of the base body, a plurality of T-type sliding grooves with the number equal to that of the gear ring fixing mechanisms are distributed with the through hole as the center, any one of the gear ring fixing mechanisms is arranged in one T-type sliding groove and can freely slide in the corresponding T-type sliding groove, any one of the gear ring fixing mechanisms comprises a sliding locating seat, a pressing plate and a pressing plate screw, the sliding locating seats are arranged in the T-type sliding grooves of the base body, the pressing plates are arranged at the outer ends of the sliding locating seats through the pressing plate screws, the diameter adjusting shaft is located in the through hole of the base body, the hydraulic cylinder is arranged on the lower portion of the base body, and a piston of the hydraulic cylinder is arranged in the through hole and is connected with the lower end of the diameter adjusting shaft. The tool has the advantages that after the structure is adopted, outer gear rings of different diameters can be clamped, and good universality is achieved.

Tool for gear shaping of outer gear ring

A tool for hobbing comprises a working table, a base, a pair of pressing rings, a gear, a pressing plate, a nut, a mandrel and a pair of conical sleeves. A through hole is formed in the middle of the working table. The mandrel comprises a cylindrical body, a conical body and cylindrical threads, wherein the conical body and the cylindrical threads are arranged at the two ends of the cylindrical body and share the same center line with the cylindrical body. The gear is embedded in the cylindrical body of the mandrel in a sleeved mode, the pair of conical sleeves embedded in the cylindrical body of the mandrel in a sleeved mode and the pair of pressing rings embedded in the cylindrical body of the mandrel in a sleeved mode are arranged on the upper end face of the gear and the lower end face of the gear respectively. The positions, embedded in the cylindrical body and the cylindrical threads of the mandrel in a sleeved mode, of the pressing plate are pressed on the conical sleeve and the pressing rings. The nut is screwed on the cylindrical threads of the mandrel and tightly presses the pressing plate. The tool for hobbing has the advantages that after the structure is adopted, the gear can be rapidly positioned and clamped; the gear with the diameter of an inner hole within a certain range can be clamped.

Tool for hobbing

An annular gear ring gear shaping tool comprises a base and multiple clamping mechanisms. The middle of the base is provided with a through hole, multiple T-type sliding grooves are distributed with the through hole as the center, the number of the T-type sliding grooves is the same as that of the clamping mechanisms, each clamping mechanism is arranged in one corresponding T-type sliding groove and can slide in the corresponding T-type sliding groove at will, each clamping mechanism comprises a sliding base, fixing screws, a pressing plate and pressing screws, the sliding bases are arranged in the T-type sliding grooves of the base, the fixing screws are screwed in the middles of the upper surfaces of the sliding bases, and the pressing plates are installed at the ends of the sliding bases through the pressing screws. The tool has the advantages that by means of the structure, a gear ring can be quickly positioned and clamped, and besides, the tool can meet the clamping requirement the gear ring with the inner hole diameter in a certain range.

Annular gear ring gear shaping tool

A die sleeve device for drilling a hole in a gear ring comprises a fixed seat, a locating seat and a mandrel. A V-type circular groove for locating the gear ring is formed in the locating seat, the locating seat is arranged on the fixed seat through screws, and the mandrel penetrates through the fixed seat and the locating seat through the bottom of the fixed seat. The die sleeve device is characterized by further comprising a hole drilling template, a pressing plate, a locking nut and the gear ring, the gear ring is located in the V-type circular groove of the locating seat, the hole drilling template is nested on the mandrel and compresses the gear ring, the mandrel is sleeved with the pressing plate, the pressing plate compresses the hole drilling template, and the locking nut is screwed at the top end of the mandrel and compresses the pressing plate. The die sleeve device has the advantages that after the structure is adopted, the gear ring can be located and clamped fast, end face hole drilling is carried out, and meanwhile gear rings of different diameters can be machined.

Li Desi

Papers

Tool for gear shaping of outer gear ring

Tool for hobbing

Annular gear ring gear shaping tool

Die sleeve device for drilling hole in gear ring