Clamping system having a "third-hand" function

Abstract

The invention relates to a clamping system (9, 10) for clamping workpieces, in particular for machining the clamped workpieces in a machining centre. The clamping system (9, 10) according to the invention has a carriage guide (11) and two carriages (12, 13 and 14, 15), which are movable in the carriage guide (11) and each bear a clamping-jaw receptacle for mounting a clamping jaw. Furthermore, theclamping system (9, 10) according to the invention comprises a rotatably mounted clamping spindle (24, 25), which acts on the first carriage (13, 14) on one side and on the second carriage (12, 15) on the other side, in order to clamp the two carriages (12, 13 and 14, 15) relative to one another in accordance with the rotary position of the clamping spindle (24, 25). Moreover, the clamping system(9, 10) according to the invention has a positionally fixed third clamping-jaw receptacle for mounting a fixed jaw. A first workpiece can thus be clamped between the first clamping jaw and the central fixed jaw, while a second workpiece can be clamped between the second clamping jaw and the central fixed jaw. Furthermore, the clamping system (9, 10) according to the invention allows a "third-hand" function. The clamping system (9, 10) according to the invention is now distinguished by the fact that a slide (26, 27) is movable along the carriage guide (11), wherein the slide (26, 27) is movable by means of a rotatably mounted adjusting spindle (28, 29). The slide (26, 27) cooperates with the first carriage (13, 14) and defines a particular space for freedom of movement of the first carriage (13, 14) relative to the slide (26, 27), such that the slide (26, 27) forms, at the boundaries of the space for freedom of movement, in each case a stop for the first carriage (13, 14), in order toallow the "third-hand" function.

Description

technical field [0001] The invention relates to a clamping system for clamping a workpiece, in particular for machining the clamped workpiece in a machining center. Background technique [0002] In modern machining centers for machining workpieces, the workpiece is usually clamped in a clamping system and then machined while clamped. Here, usually a vise is used As a clamping system, the vise has, for example, a central fixed jaw and two outer clamping jaws, wherein the two clamping jaws can be moved relative to each other by the clamping spindle for clamping The workpiece is clamped between the clamping jaws and the fixed jaws. [0003] Furthermore, it is known from the prior art to equip such vises with a so-called "third hand" function. This means that it is often necessary to hold both workpieces during the fixed clamping, since they would otherwise fall out of the vise in the unclamped state. For this reason, two hands are required for manual operation, so that a t...

AI Technical Summary

Problems solved by technology

[0007] Furthermore, in known vises, the "third hand" function can only be realized on one side, which means that the workpiece can only be temporarily held on one side of the vise, while on the other side of the vise The workpiece must be held manually or mechanically until the end of the clamping process

[0008] A further disadvantage is that four workpieces can only be clamped with floating jaws, which usually prevents the robot from operating, since the vise is also oriented vertically during robot operation, and the jaws cannot stay here due to the vertical orientation. in its place

[0009] Finally, a disadvantage of known vises with a "third hand" function is that this "third hand" function cannot be guaranteed against contamination, since for example material debris can intrude, which affects the spring travel

That is, the known vises are usually open at the top, so that debris can penetrate, which in the worst case leads to functional impairment

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