RADIAL PRESS

Abstract

A radial press is provided, the radial press having a frame structure, a pressing tool, a drive unit, and a press control. The pressing tool comprises a plurality of pressing elements which are disposed uniformly concentrically around a press axis and have pressing surfaces. During the appropriate activation of the drive unit, the pressing elements can be moved synchronously as required towards or away from the press axis. To this end, at least two measured value recorders, which are connected for signal transmission purposes to a comparator associated with the press control, are disposed on the pressing tool at positions spaced apart from one another in the direction of the press axis (A). When the comparative value, generated by the comparator, of the measured values provided by the measured value recorders exceeds a tolerance range stored in the press control, an activation of the signal output unit is triggered.

Claims

1. A radial press comprising: a frame structure; a pressing tool; a drive unit; and a press control, wherein the pressing tool comprises a plurality of pressing elements (2) having pressing surfaces (8), which elements are disposed uniformly concentrically around a press axis, and can be moved synchronously, optionally in the direction toward the press axis (A) or away from it, with corresponding activation of the drive unit, wherein at least two measured value recorders (12), connected with a comparator that is associated with the press control, for transmitting signals, are disposed on the pressing tool at positions that are spaced apart from one another in the direction of the press axis (A), wherein activation of a signal output unit is triggered if a tolerance range stored in the memory of the press control is exceeded by the comparison value generated in the comparator, of the measured values made available by the measured value recorders (12).

2. The radial press of claim 1, wherein if the tolerance range is exceeded by the comparison value of the signals made available by the measured value recorders (12), the press control automatically acts on the drive unit.

3. The radial press of claim 1, wherein three measured value recorders (12) that are spaced apart from one another in the direction of the press axis (A) are provided.

4. The radial press of claim 1, wherein the pressing elements (2) each comprise base jaws (6) and removable pressing jaws (9) that have the pressing surfaces (8).

5. The radial press of claim 4, wherein removable intermediate jaws (7) are disposed, in each instance, between the base jaws (6) and the pressing jaws (9).

6. The radial press of claim 4, wherein measured value recorders (12) are disposed on at least one base jaw (6), in the region of its two ends that lie opposite one another in the direction of the press axis (A).

7. The radial press of claim 6, wherein the measured value recorders (12) are disposed on the face surfaces (10, 11) of at least one base jaw (6).

8. The radial press of claim 4, wherein the measured value recorders (12) are disposed on a base jaw (6.1) that is fixed in place.

9. The radial press of claim 4, wherein measured value recorders (12) are disposed on at least one pressing jaw (9), in the region of its two ends that lie opposite one another in the direction of the press axis (A), which recorders communicate wirelessly with the press control so as to transmit signals.

10. The radial press of claim 1, wherein the measured value recorders (12) are structured as deformation recorders, particularly as full-bridge strain gauges (13).

11. The radial press of claim 1, wherein the signal output unit comprises a comparison value display.

12. The radial press of claim 1, wherein the tolerance range can be set by means of an input unit.

13. The radial press of claim 1, wherein the press control comprises an adaptation circuit for the tolerance range, which circuit takes the geometrical location of the pressing surfaces (8) relative to the position of the measured value recorders (12) into consideration as the input signal.

14. The radial press of claim 1, further comprising multiple recorder arrangements disposed distributed around press axis (A), each having at least two measured value recorders (12), wherein formation of an average value takes place in the press control.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the following, the present invention will be explained in greater detail using a preferred exemplary embodiment, structured as a yoke press, shown in the drawing, which is based on a design of the radial press essentially corresponding to DE 4135465 A1 (to the extent that reference is made to it). In this regard, the figures show:

[0026] FIG. 1a detail, in a top view, of the face side of the pressing tool of the radial press, which faces the operator, with the equipment according to the invention, and

[0027] FIG. 2a detail, in a perspective view, of the face side of the pressing tool of the radial press, which faces away from the operator.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] The radial press on which the present exemplary embodiment is based corresponds, to a great extent, to the design described and explained in DE 4135465 A1, as it is furthermore also widespread in practice. To avoid repetition, reference is therefore made to the said publication, to its full extent.

[0029] In the detail of the front-side top view of the pressing tool shown in FIG. 1, the lower yoke 1 (fixed in place), five pressing elements 2, the springs 3 disposed between the pressing elements, the two slide panels 4 that are laid into the lower yoke 1, as well as the slide panels 5 affixed to the 45 pressing elements can be seen. Differently from what is illustrated in DE 4135465 A1, according to FIG. 1 the lower pressing element 2.1, disposed fixed in place relative to the lower yoke 1, does not touch the lower yoke directly, but rather supports itself exclusively on the slide panels 4. And furthermore, FIGS. 1 and 2 illustrate the three-part structure of the pressing elements 2, in each instance, composed of a base jaw 6, an intermediate jaw 7 that is removably affixed to the base jaw, and a pressing jaw 9 that has the pressing surface 8 and is removably affixed to the intermediate jaw, as is typical when using pressing elements having a great radial expanse for pressing tasks having a comparatively small diameter. If the radial press is refitted for processing workpieces having a comparatively large diameter, then pressing jaws 9 are used that are mounted directly on the base jaws 6, so that in this case, the pressing elements 2 have two parts.

[0030] FIG. 2 shows a typical situation of the individual parts of three-part pressing elements 2 relative to one another, as far as the axial expanse is concerned. Specifically, the intermediate jaw 7 is clearly shorter than the base jaw 6, and the pressing jaw 9 in turn is clearly shorter than the intermediate jaw 7. In this way, in a typical application, pressing jaws having a length of 70 mm on base jaws having a length of 118 mm can be used, for example, where the pressing jaws 9, the intermediate jaws 7, and the base jaws 6 end almost flush on the side facing the operator (FIG. 1).

[0031] On the lower pressing element 2.1, which is fixed in place, namely on its base jaw 6.1, measured value recorders in the form of full-bridge strain gauges 13 and 14 are affixed at the end side, on the two face sides 10 and 11 that lie opposite one another. These are connected with the press control, namely with a comparator assigned to it, by way of signal cables 15 so as to transmit signals.