RO126547A2 - Device for the frontal precision machining of universal joints - Google Patents

Abstract

The invention relates to a device for the frontal precision machining of universal joints or other members with crossed shaft pieces, which allows the successive or simultaneous surface machining during milling, drilling, grinding operations or control. According to the invention, the device comprises a body (1) positioned and fastened with some T-shaped wedges (4, 17 and 23) and screws on a base plate (20) having two working stations wherein each semi-finished product is oriented on two coaxial arms in some short fixed prisms (12) and on other two arms in a long fragmented mobile and rotating prism (5) which is self-centered, precisely and constantly by its shape in a wear sleeve (15) driving a block plunger (7) after a fastening system comprising a tilt flange (9) and some oscillating forks (8 and 11) brings the piece to be machined in contact with some supports.

Description

DEVICE FOR PRECISION FRONT PROCESSING

CRUCILOR CÂRD AN

The invention relates to a device for orienting and fixing semi-finished products for precision frontal processing of gimbal crosses, consisting of modular components with a high level of flexibility, which allows the successive or simultaneous execution of surfaces, single or multi-tool, in milling operations, drilling, rectification or control.

Devices for orienting and fixing semi-finished products with one or more workstations are known, with the support elements of the fixed prism or fork type with three active surfaces on two arms and the oscillating fork with two active surfaces on the other two arms, which are used on universal or specialized milling, drilling, grinding or control systems.

The solutions are described in the literature by the authors Ion Stănescu and Voicu Tache (Devices for Machine Tools. Design and construction, Technical Publishing House, Bucharest, 1979), Sanda Vasii-Roșculeț and collaborators (Device Design, Didactic and Pedagogical Publishing House, Bucharest, 1982), Voicu Tache, Ion Ungureanu and Constantin Stroe (Device design elements for machine tools, Technical Publishing House, Bucharest, 1985) but also in the catalogs of companies from the country and abroad that manufacture and sell devices or machines specialized for this type of technological operations.

The disadvantages of these devices are that those for universal machines have low accuracy and productivity, and those for specialized machines have a high degree of complexity, high production costs and low ability to adapt to changes in the technological system related to size and characteristics. semi-finished product, equipment, technological process and production volume.

Ί / ο ^ -2010-00252-1 8 -03- 2010

The device for the precision frontal processing of gimbal crosses according to the invention eliminates the mentioned disadvantages in that the orientation and fixing system of the optimum semi-finished product from the kinematic, constructive, technological and economic point of view ensures with certainty and consistently a high level of precision. , productivity and low costs of realization and adaptation, through the modular, flexible, removable, adjustable and reconfigurable components of its structure. The body of the device has two monobloc workstations, but there can also be two independent modules, in which the two workpieces are oriented and fixed with high precision on the fixed and mobile prism supports, configured according to the type of semi-finished product.

The problem solved by the invention is that, by its simple, robust and flexible construction, this device, made up of modular structures, ensures a definite increase in the precision, productivity and adaptability performance of the technological equipment and a simplification of the technology in the processing processes, assembly or control.

The device for precision frontal processing of gimbal crosses according to the invention has the following advantages:

- increases the processing accuracy by optimizing the constructive and functional solutions of the orientation and fixing supports;

- the orientation and fixing errors caused by the construction, operation and wear of the support elements are considerably reduced;

- increases the degree of flexibility of the technological equipment through the modular construction of the device components;

- increases productivity due to the construction of the system of orientation, fixing and locking of the supports and the possibility of processing two or more parts;

8 -03- 2010

- the device can be used for milling, drilling, grinding, broaching, assembly or control operations on universal machine tools, aggregate or specialized machines and machining centers;

- contributes to the modernization of equipment;

- the modular structures of the device allow an easy and economical reconfiguration of the device for other types of dimensions of semi-finished parts with crossed axes;

- the time and costs of manufacturing and technological adaptation of manufacturing are considerably reduced.

An embodiment of the invention is given below in connection with FIG. 1 .. .3 which represents:

- Fig. 1, cross-section through a workstation of the device at which the milling or grinding operation is performed;

- fig.2, main view with partial section of the device assembly with the two workstations;

- fig.3, partial cross section in the cylindrical area of the long, mobile, rotating prism which is locked laterally.

The device for the precision frontal processing of the gimbal crosses, according to the invention, consists of a body 1, positioned and fixed on the base plate 20 with T-pins 4, 17, 23 and screws, with two monobloc work stations having for each prefabricated two fixed short prisms 12 of orientation, on the two coaxial arms of the cardan cross and, between them, a long, fragmented, movable and rotating prism 5 for the other two arms, which is locked by rotating the rosette screw 6 and moving the plunger 7 , after the folding clamping system 9 and the oscillating forks 8 and 11 bring the workpieces into contact with the supports.

The orientation and fixing system of the semi-finished product ensures a high level of machining accuracy by optimizing the construction and operation of the long prism 5,

8 -03 ·· K w movable and rotating, which by the locking exerted by the plunger 7, self-centers safely and constantly in point K on the inner bore of the bushing 15 of the body 1, eliminating the functional play and wear of some support elements.

Claims (2)

Device for the precision frontal processing of gimbal crosses, characterized in that it consists of a body (1) with two working stations, where each blank is oriented in two fixed prisms (12) on two coaxial arms and, on the other two arms, in the long fragmented mobile and rotating prism (5) which self-centers by shape, precisely and constantly, in the wear sleeve (15), actuating the screw (6) and the plunger (7) after the clamping system the folding fork (9) and the oscillating forks (8) and (11) bring the workpiece into contact with the supports. Device for precision frontal processing of cardan shafts according to claim 1, characterized in that it consists entirely of modular, removable and reusable components, which can also be reconfigured in the version with two independent workstations with a high degree of flexibility to be easily and economically adapted to the processing of other types of semi-finished products.