DD263488A1 - TOOL FOR WORKING CYLINDRICAL INTERIORS - Google Patents

Abstract

The invention relates to a task as a Laeppdorn executed tool with outside daumelnd arranged Laeppsegmenten for processing cylindrical Innenflaechen. The Laeppsegmente are interchangeable and their pressure on the cylindrical inner surface is mechanically metered, which roundnesses and deviations from the axis parallelism can be compensated. Thus, the tool is given relatively independent of shape and position deviations of the workpiece on simple drilling and lathes high availability. The interchangeability of the Laeppsegmente realized with appropriate Bestückung also a draw grinding. The inventive solution has the regeneration of worn parts or assemblies to the content and is therefore primarily applicable to the maintenance sector, with significant savings in material and manufacturing costs can be achieved in a wide range of applications. figure

Description

-2- 263

With the aid of the invention, it is possible to lull cylindrical inner surfaces with deviations in shape and position, without causing a clogging of the tool The tolerances of the deviations are absorbed by the swash plate and the pressure springs in the tool, which makes the use of the tool possible In addition, an exchange of the lapping segments against corresponding segments with draw-grinding bodies is possible, among other things, which decisively widens the field of application of the lapping mandrel.

embodiment

The solution according to the invention is explained in more detail below using the exemplary embodiment of a tool designed as a lapping mandrel. The accompanying drawing shows a side view of Läppdorn6s as a sectional view.

A complete with the clamping device of a known, not graphically illustrated machine tool base body 1 has at its opposite end in addition to a housing-like formation a bore for receiving a beaufschlaqten by compression spring 2 pull rod 3, which by existing on the shaft of the body 1 adjusting nut 4 with lock nut 5 and pin 6 is designed to be axially adjustable.

On both sides of the tie rod 3, the main body 1 carries a respective drawing wedge 7 with adjacent pressure wedge 8. The pressure wedges 8 each have two compression springs 9,10 which intervene übor appropriate reductions in downstream Datimelplatten 1T.

In each case a swash plate 12 is provided centrally between the compression springs 9, 10, which rests in a groove of a respective lapping segment 13. Both lapping segments 13 are made by groove? lateral recesses of screwed executed ring pieces 14,15 held movably movable.

Claims (2)

Claim: 1. Tool for machining cylindrical inner surfaces of workpieces with shape and position deviations to the tool, consisting of a recordable in a fixture body with existing Läppsegmenten, characterized in that the base body (1) at its end running like a box with a central bore with adjusting nut (4), locknut (5) and pin (6) axially adjustable and by compression spring (2) acted upon pull rod (3) has, and that in one plane on both sides of the tie rod (3) in each case a pull key (7) with adjacent pressure wedge (8 ), wherein each pressure wedge (8) via two compression springs (9,10), guided in corresponding recesses, with a Daumelplatte (11) into engagement, which centrally between the two compression springs (9,10) has a swash plate (12 ) and with a lapping segment (13), which is guided laterally in ring pieces (14,15), daumelnd is operatively operatively connected. 2. claim according to item 1, characterized in that the ring pieces (14,15) for interchangeability of the lapping segments (13) are designed screwed. For this 1 page drawing Field of application of the invention The invention relates to a tool designed primarily as Läppdorn with externally daumelnd arranged lapping segments for machining cylindrical inner surfaces. The lapping segments are interchangeable and their pressure on the cylindrical Innenfläcb "! St mechanise) 'metered, whereby roundness and deviations from the Achsparellelität can be compensated'. Thus, the tool is relatively independent of form and position deviations dos workpiece and use on simple tool machines high availability. By interchangeability of Läppsegmente against corresponding grinding segments and a grinding grinding can be realized. A preferred field of application is the Instano.ialtungssektor for the regeneration of worn parts or assemblies such. B. brake cylinder of motor vehicles. Characteristic of the known technical η solutions Known lapping, honing and grinding tools for machining cylindrical inner surfaces are usually designed so that a ^ improvement in the surface, the Mßßgenauigkoit and the shape and position deviations ir unit is accompanied. These requirements always require a complex, specially gesialtete machine tool. For lapping tools, the tolerance range is also greatly restricted in terms of diameter, shape and position deviations for the workpieces. According to DE-OS 2,330,390 a solution for processing of bearing surfaces with rigidly arranged l.äppsegmenten has been proposed, which, however, is limited oinsetzbar due to the disadvantages already described. Object of the invention The aim of the invention is the elimination oer said disadvantages by creating a relatively easy to manufacture and therefore cost-effective tool with a large Anwendungsboreich. Dutch regeneration and thus reuse of components is said to achieve significant material savings while reducing manufacturing costs. Explanation of the essence of the invention The object of the invention is the design of a preferably designed as Läppdorn tool for machining cylindrical inner surfaces, ohno that greater demands are made on shape and position deviations of the workpiece. The use should be guaranteed t ticular machine tools high availability, with replaceability of daumelnd movable lapping segments. According to the invention, this object is achieved by virtue of the fact that a base body with a housing-like end has a central bore with an axially adjustable drawbar. On both sides of the pull rod is a pull key with adjacent pressure wedge present, which is about two springs with a Daumelplatte and associated swash plate in engagement. The Daurnelpia'.te centered on the two compression springs on a lapping segment in engagement with a swash plate. With change in the axial position of the tie rod can be regulated on the cylindrical inner surface of the workpiece on the drawing and pressure wedges with Daumelplatte and Daumelscheibe the contact pressure of Läppsegmente. When changing the shape and position of the cylinder inner surfaces to the middle of the tool (the pressure springs of the swashplate and the swashplate always produce the same pressure on the middle of the lapping segment, with a correspondingly swirling population.