DD274573A1 - CLOSING DEVICE FOR INTERNAL TENSION PREFERABLY HOLLOW CYLINDRICAL KOERPER - Google Patents

Abstract

The invention relates to a clamping device for internal stress preferably hollow cylindrical body for their non-cutting or machining and is applicable in mechanical engineering. To a basic body, two or more clamping jaws are arranged at their ends via a cone element fixedly connected to the base body and a cone element which is axially movable on the base body. Between the cone elements, a compression spring is mounted around the basic body, the pressure force brings two stop disks to the cone elements to the plant, which are provided at its Umfangsflaeche with spacer elements. In the relaxed state of the clamping jaws the Randflaechen the stop plates press against two Innenbuende the jaws, whereby a holding together of the clamping jaws and a self-sustaining stabilization of the clamping device is achieved. Fig. 1

Description

For this 1 page drawings

Field of application of the invention

The invention relates to a clamping device for internal tension preferably hor.lzylincVischer Ku ₁ p? R for their chipless or machining and is applicable in mechanical engineering.

Characteristic of the known state of the art

From DD-PS 11170 a clamping mandrel for internal stress is known, which carries two or more centrally arranged around a body clamping jaws, which are held with one or more elastic elements on the Grundkörpe ·, wherein the force acting by the centering of a working machine axial pressure in a radial pressure is converted. The ends of the clamping jaws form complementary centering cones in which the centering points engage directly.

When picking up the workpiece and removing it from the mandrel, it is necessary to bring the centering out of engagement with the ends of the jaws.

In order to remain as a closed clamping system, the entire weight forces of the arranged around the body clamping jaws of the mandrel must be absorbed by the blastic elements. For workpieces with a very large inner diameter, however, the elastic elements alone are no longer able to absorb the high weight forces on the jaws, so that the jaws can unintentionally release from the body and the mandrel falls apart.

Object of the invention

ZieJ the invention is to provide with simple means and manufacturing technology little effort a clamping device for internal stress preferably hollow cylindrical body, with a smooth and faster technological workflow in a non-cutting or machining of the workpieces is made possible.

Explanation of the essence of the invention

The object of the invention is to provide a clamping device for internal stress, preferably hollow cylindrical Körper, in which an accidental release of the clamping jaws from the body during workpiece change avoided and thus an additionally secured and independently closed clamping system is made possible.

According to the invention the object is achieved in that two or more clamping jaws are arranged at their ends by a base body via a fixedly connected to the main body cone element and an axially movable on the base element cone element. Between the cone elements, a compression spring is mounted around the base body, the pressure force of which brings two preferably rotationally symmetrical stop disks to the cone elements to the plant. The stop discs are provided on their peripheral surface with preferably cylindrical spacers which engage between the jaws and ensure a uniform distance between the jaws with each other. In the relaxed state of the clamping jaws press the edge surfaces of the acted upon by the force of the compression spring stop plates against two inner collars of the clamping jaws, whereby a holding together of the clamping jaws and thus an independent stabilization of the clamping device is achieved. To tension a workpiece, a preferably hydraulically actuated pressure piece is centered against the axially fixed on the axially fixed body

Pressed cone element, whereby the jaws axially and radially pushed forward by both cone elements and against the Workpieces are clamped. During the clamping process take over · - two elastic elements on the clamping jaws Position stabilization, since the stop disks were released from the Innonbund. In the relaxed state of the jaws, the elastic elements serve only for additional position stabilization Jaws. embodiment The invention will be explained in more detail below with reference to the following example. In the accompanying drawings show

Fig. 1: clamping device in the tensioned state cut in front view Fig. 2: Top view of the clamping device of Fig. 1 in section A- A

To a main body 1 are three clamping jaws 2; 3; 4 at their ends via a on the base body 1 by a feather key fifth

attached cone element 6 and arranged on the base body 1 axially movable cone element 7.

Between the cone elements 6; 7 is located around the main body 1, a compression spring 8, the pressure force of two

rotationally symmetrical stop disks 9; 10 brings to the cone element 6 and 7 to the plant. The stop disks 9; 10weisen on its peripheral surface in each case three cylindrical spacers 11, which is a uniform distance between the

Jaws 2; 3; 4 ensure. In the relaxed state of the clamping jaws 2; 3; 4 press the edge surfaces of acted upon by the force of the compression spring 8 Stop washers 9; 10 against an inner collar 12 and 13 of the clamping jaws 2; 3; 4, whereby the clamping jaws 2; 3; 4

be held together and the clamping device stabilized independently.

For tensioning a workpiece, a hydraulically actuated pressure element 14 is centric against that on the axially fixed Base body 1 axially movable cone element 7 printed, whereby the clamping jaws 2; 3; 4 through the cone elements 6; 7 axially

and radially displaced and clamped against the workpiece. During the tensioning process take over two elastic

Elements 15; 16 on the clamping jaws 2; 3; 4, the position stabilization of the same, since the stop disks 9; 10 from the inner waistband 12

or 13 are solved.

In the relaxed state of the clamping jaws 2; 3; 4 represent the elastic elements 15; 16 just an extra Position stabilization of the clamping jaws 2; 3; 4 and are not alone capable of greater weight forces of the clamping jaws 2; 3;

4 record.

Claims (3)

1. Spanneinricht'jng to the internal stress preferably hollow cylindrical body, consisting of two or more.centrally arranged around a body clamping jaws and one or more around the jaws arranged elastic elements, characterized in that the clamping jaws (2; 3; 4) at their ends via a cone element (6) fixedly connected to the base body (1) and a cone element (7) axially movable on the base body (1) about the base body (1), between the cone moments (6; 1) arranged compression spring (8) on the cone elements (6; 7) adjacent stop discs (9) or (10) mounted on the peripheral surface and the clamping jaws (2; 3; 4) evenly spaced spacer element (11) and arranged the edge surfaces of the stop disks (9, 10) can be brought into engagement with an inner collar (12) or (13) of the clamping jaws (2, 3, 4). 2. Clamping device according to claim I, characterized in that the stop elements (9, 10) are preferably formed rotationally symmetrical. 3. Clamping device according to claim 1, characterized in that the spacer elements (11) are preferably cylindrical.