DD203852A1 - ARRANGEMENT FOR FIXING GRINDING SEGMENTS OF HEAD-CUTTING GRINDING WHEELS - Google Patents

Abstract

The abrasive segment holder according to the invention can be used in vertical flat grinding machines. Furthermore, application cases are conceivable where working with Scheifsegmenten in frontal grinding. The aim of the invention, a much shorter clamping time of the abrasive segments is to be achieved at a higher uniformity of the clamping. The invention has as its object to provide an arrangement for central clamping or loosening of the abrasive segments. According to the invention this is achieved by connecting the spindle 1 via the intermediate bushing 2 and the base body 3 to the punching ring 4 in a form-locking or force-locking manner and a piston 10 which has a ring 11, supply bores and a pressure chamber 12 with a liquid or gaseous medium can be acted upon, laengsbeweglich is disposed on the intermediate sleeve 2, wherein at the periphery of the piston 10 sternfoermig arranged cam clamping elements 7 record, which are in turn about Keilstuecke 6 with the abrasive segments 5 in operative connection.

Description

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Title of the invention.

Arrangement for attaching grinding segments of grinding wheels which cut the end face

Field of application of the invention

The field of application of the invention extends to Stirnschleifkörper consisting of abrasive segments for use in vertical flat grinding ο Furthermore, applications are conceivable, where worked with grinding segments in frontal grinding.

Characteristic of the known technical solution For abrasive grinding tools working in face grinding and consisting of abrasive body segments, it is customary to glue the abrasive segments into the base body (DD - WP 119 368) or to mechanically clamp them individually (DE - PS 846 663). This procedure is very time consuming and the clamping quality is crucially dependent on the skill of the operator.

Object of the invention

The aim of the invention is a significantly shorter clamping time of the abrasive segments can be achieved with a higher uniformity of the clamping.

Explanation of the essence of the invention

The technical defect described in the characteristic of the known technical solution can be attributed to the fact that the abrasive segments are individually fastened manually in the base body

In order to eliminate these ^C AUSE, the invention addresses the problem

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to provide an arrangement for central clamping or loosening of the abrasive segments.

According to the invention this is achieved in that the spindle 1 via the intermediate sleeve 2 and the base body 3 with the outer ring 4 is positively and non-positively connected and a piston 10, via a ring 11, feed holes and a pressure chamber 12 with a liquid or gaseous medium acted upon - is longitudinally movably disposed on the intermediate sleeve 2, wherein the circumference of the piston 10 radially arranged cam record clamping elements 7, which in turn are on wedge pieces 6 with the grinding segments 5 in operative connection.

embodiment

The spindle 1 - t protrudes-via an intermediate bushing 2, the base body 3, which is executed divided for manufacturing reasons and is firmly connected to the outer ring 4. In the main body 3, the abrasive segments 5 are braced against the outer ring 4 via the wedge pieces 6. The wedge pieces 6 are pressed by clamping elements 7, preferably cylindrical rollers, by the springs 8 to the outside, wherein the clamping force can be changed via the screws 9. If an assumed wedge pitch of the spring force to the contact force would be about 1:10. The solution chosen allows the use of segments that vary in width (in the clamping direction) within certain limits, since the force-loaded cylindrical rollers 7 on the wedge slope adapts to the corresponding segment width. The piston 10 moves relative to the intermediate sleeve 2. It is designed to be star-shaped on the circumference and forms the abutment for the clamping elements 7.

The release of the segments is such that via the ring 11 and the feed holes in the spindle 1, the pressure chamber 12 is pneumatically acted upon, with the aim to move the piston 10 axially. The piston 10 thereby moves upward, lifts the cylindrical rollers 7 and thus relaxes the wedge pieces. 6

The springs 13 press the piston 10 in the clamping position of the abrasive segments 5 as soon as the pressurization is withdrawn «

To prevent inadvertent falling out of the abrasive segments 5, the wedge pieces 6 are pressed by the springs 14, which are supported on the support brackets 15 against the abrasive segments 5, which in turn can easily change over the auxiliary lever 16, which is supported on the cover plate. The cover plate 17 is fixedly mounted on the intermediate sleeve 2.

The clamping device is designed to be self-locking and due to the effect of centrifugal forces, the clamping effect on the abrasive body segments 5 increases during rotation in addition.

Claims (4)

- <* - 2359 1 1 O, invention claim 1. Arrangement for attaching grinding segments of frontally cutting grinding wheels characterized in that the spindle (1) 'via the intermediate bush (2) and the base body (3) with the outer ring (4) is positively or non-positively connected and a piston (10) _f via a ring (11), feed holes and a pressure chamber (12) is acted upon with a liquid or gaseous medium, longitudinally movably on the intermediate bush (2) is arranged, wherein on the circumference of the piston (10) radially arranged cam record clamping elements (7), which in turn via wedge pieces (6) the abrasive segments (S) are in operative connection. 2. Arrangement according to item 1, characterized in that the wedge pieces (6) via springs (14) are non-positively connected to the support brackets (15) and the abrasive segments (5). 3. Arrangement according to item 2, characterized in that the bias of the springs (14) by an auxiliary lever (16) can be canceled. 4. Arrangement according to items 1 to 3, characterized in that the clamping elements (7) are biased by springs (8). Bierzu_ __Seiten drawings