DE3315215A1 - Device for clamping and/or gripping articles, especially workpieces which are susceptible to damage and/or deformation - Google Patents

Abstract

Device for gripping and/or clamping articles, especially workpieces which are susceptible to damage and/or deformation. To avoid damage and/or deformation of susceptible workpieces (for example piston rods or hydraulic cylinders) during gripping and clamping, such workpieces must be handled with the greatest care. The device illustrated in Figure 1 and Figure 2 is characterised by: at least one container which can be filled with a pressure medium and emptied, is made of flexible and/or extensible material, is supported by a support plate (2) allocated to the container and comes to rest in a pressurised state subject to magnetic flux against the workpiece (3) which is pressed in this way against at least one fixed clamping surface (1). The device can be used to grip and clamp workpieces which are susceptible to damage and/or deformation with a low surface pressure and take hold of workpieces which have a very great variety of cross-sectional shapes without special clamping jaws over a large clamping range and to manipulate them by means of a crane. <IMAGE>

Description

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of workpieces that are sensitive to damage and / or deformation The invention relates to a device for gripping and / or clamping objects, with the features described in more detail in the preamble of claim 1.

In order to avoid damage and / or deformation, are sensitive Workpieces when gripping and clamping, as well as when transporting, with great care to handle. Round bars, for example, are particularly sensitive in this regard. which are used as piston rods for hydraulic cylinders. These are e.g. T. finest ground and polished and have surface roughness depths of less than 0.002 mm on. Up to a weight of approx. 15 kg, such parts are usually immediately gripped by hand, moved and stored in prism bars. Share with a higher one Weight also know, as far as they are made of ferrous materials, by means of plastic-coated Permanent or battery lifting magnets are manipulated. However, these have a relatively large mass, which when touching down, i.e. when it comes into contact with the workpiece, is delayed and can cause damage. In addition, the possibility of use this relatively expensive tool on workpieces made of magnetizable materials limited.

It is common practice to handle workpieces made of non-ferrous metals To use vacuum grippers, for which, however, sufficiently large, flat surfaces must be available. Nevertheless, this is also the case with this aid Possibility of use is limited because of the very great uncertainty of holding.

In addition, coated lifting grippers are in use at those as well as with the lifting magnets, those connected with the high own mass Risk of damage to the workpiece when touched, as well as the very high point load are present during tensioning, which exclude a comprehensive application.

The object of the invention is to provide a device for gripping and / or Clamping, in particular objects that are independent of their material properties and workpieces that are sensitive to damage and / or deformation to create which, with the simplest structure, is able to remove the workpieces without damage and / or deformation of the surface securely to grasp and / or These The object is achieved by the characterizing part of patent claim 1.

Further advantageous details of the invention are evident from the rest Claims.

The invention makes it possible to grasp and / or clamp des .Werkstückes required force on a very large part of the surface of the To distribute the workpiece and thus reduce the surface pressure to such an extent that Deformations and, if only due to the material used for the container, Damage is excluded. The device according to the invention also has a relatively large clamping range, so that no complicated, dimensionally accurate and dimensionally accurate Clamping devices are required.

The invention is explained in more detail below with reference to a drawing.

It shows: FIG. 1 a front view of the clamping device according to the invention with partial section and FIG. 2 the device shown in FIG. 1 in a view of the side.

The device according to the invention shown in the figures has a Rectangular frame (5) on which at a distance from each other two down extending support plates (2) are attached. On the inside of the support plates (2), as well as the side of the lower frame part facing the support plates are in each case several designed as a hose container (4) attached via a distributor (6) and via pressure medium lines (7) from a pressure medium source, not shown, e.g. a pressure medium accumulator can be acted upon with pressure medium. With a pressure medium it can be either a fluid or a liquid. The beating and releasing the hoses with a pressure medium is carried out by means of a push button: open valve (8). The hoses are designed in your dimensions so that how is shown in Fig. 1, they in the loaded condition on a large part of the surface of the workpiece to be gripped and a sufficient amount of pressure on the tool Apply surface pressure that prevents the workpiece from being lifted when the device is raised falls out of this. In order to achieve sufficient repeatability of the gripping or To achieve clamping process, the workpiece is pressed against a fixed clamping point during this process.

In the present exemplary embodiment, these are designed in the shape of a prism.

A handle (9) connected to the upper frame part of the device is used for manual handling of the device, while in the upper frame part a Eyelet screw (10) is arranged on which the entire device to facilitate the transport of heavy parts can be attached to e.g. a crane.

Claims (6)

PATENT CLAIMS 1. Device for gripping and / or clamping objects, especially sensitive to damage and / or deformation Workpieces, characterized by at least one that can be filled and drained with pressure medium Container made of flexible and / or stretchable material that attaches to one of the containers associated support plate (2) is supported and in the pressurized state under the flow of force on the workpiece (3) pressed against at least one fixed clamping surface (1) comes to the plant. 2. Apparatus according to claim 1, characterized in that the support plates (2) the workpiece (3) are arranged in a U-shape encompassing and on the inside carry one container at a time. 3. Device according to claims 1 and 2, characterized in that that the container indirectly over the contour of the workpiece (3) adapted elastically deformable clamping pieces or come to rest directly on the workpiece (3). 4. Device according to claims 1 to 3, d a d u r c h g e k e It is not noted that hoses (4) are provided as containers. 5. Devices according to one or more of claims 1 to 4, d it is indicated that the pressure medium is gaseous. 6. Apparatus according to claim 1, characterized in that the fixed clamping surfaces (1) are arranged in the shape of a prism.