DE202007018104U1 - Clamping and clamping device for machining pipe and profile material - Google Patents

Abstract

clamping and clamping device for processing pipe and profile material consisting of a clamping element, which by means of elastic deformation By pressure, a non-positive connection with the produces exciting part, characterized in that both sides of the clamping area (1) a workpiece guide (2) for pipe and profile material (3) is arranged, wherein the pressure chamber (4) of the clamping area for clamping and holding the Pipe and profile material (3) acted upon by lines with compressed gas becomes.

Description

The The invention relates to a clamping and tensioning device for machining of pipe and profile material according to the characteristics of the first Claim.

The Invention is suitable for pipes, bar stock with different Profiles in a designated position fast, reliable and securely clamp and hold, with short chucking and holding Relaxation times are present and particularly sensitive surfaces to be kept gentle. It is possible, the clamped material fast and safe rotational and translational to clamp and move.

clamping and tensioning devices of various types have long been known but often expensive, expensive and susceptible to wear. Known processing techniques are tensioning processes, Flame cutting, laser and water jet technology with turning attachment or robots. For the areas of diameters to be covered as well as profile sizes and geometries at random long rod lengths it is known, the rods by means of Clamp chuck and keep it reliable. That has that Disadvantage that a gentle hold and a quick opening and closing the clamping and holding device only with considerable mechanical engineering effort or can be done by hand. There are usually simple geometric shapes, such as round, angular, polygonal easy to tension. If different forms occur is a considerable effort required to appropriate Adjust clamping and tensioning devices. A fast and gentle Mounting and delivery of the device is not readily possible.

clamping and clamping devices by means of elastic deformation of the holding Parts are known for tools as hydro-tensioning element.

DE 297 11 184 U1 describes a hydro-clamping element for establishing a connection between a rotating in use tool for working wood or wood-like tool and a cylindrical drive shaft in which the hub body on which the tool is fixed and clamped on the cylindrical drive shaft, so that the torque of the Shaft can be transmitted to the tool only due to the frictional engagement between the shaft and hub body. The tension member has a space filled with a hydraulic medium, which is pressurized to tension, so that it deforms the tension member so that the inner diameter decreases. This results in a clamping of the clamping element on the drive shaft. The device is used to fasten a tool on a shaft and has the disadvantage that it is operated by means of liquid, which presupposes the generation of a hydraulic pressure and involves the risk that liquid leaks in the event of defects, which can lead to contamination. Furthermore, the device is not suitable pipe and profile material, which is characterized by a special length-diameter ratio to keep safe and reliable.

DE 296 14 727 U1 describes a Dehnspannfutter, consisting of a dimensionally stable chuck body with a central receiving bore for the shank to be clamped, arranged with a chuck body axially to the receiving bore elongated annular chamber which is bounded axially inwardly by an under pressure elastically deformable inner wall and filled with an incompatible liquid and from a device for generating a hydraulic pressure in the annular chamber. This device, which is suitable to hold tools, has the disadvantage of a hydraulic device and is generally not suitable to keep long pipe and profile material safely and reliably.

Other devices of the type mentioned are made GB 2 111 172 A or off FR 2 418 055 known.

outgoing It is the object of the invention in the prior art a clamping and clamping device for machining pipe and profile material to develop, with the tubes and profiles of different cross sections fast, gentle, stable and reliable can be kept.

These Task is by a clamping and clamping device according to the features solved the first claim.

under claims give advantageous embodiments of the invention again.

The proposed solution provides a clamping and tensioning device for machining pipe and profile material, consisting of a clamping element, which by means of elastic deformation by pressure produces a frictional connection with the part to be clamped. According to the invention, a workpiece guide for the tube and profile material is arranged on both sides of the elastic clamping region, which ensures stability and guidance of the workpiece. The intermediate pressure chamber for clamping and holding the workpiece is provided with pressure lines through which a pressurized gas is applied, which leads to the expansion of a clamping element, which the respective Encloses workpiece and holds. The tensioning element can consist of an elastomer which adjusts to the shape of the respective workpiece and thereby keeps it gentle and reliable. The pressure lines can be connected via a valve to conventional compressed air lines or to a compressed air generator. Compressed gas has the advantage that defects in the clamping element or the lines can not occur. As compressed gas compressed air is suitable. The workpiece guides arranged on both sides of the clamping area should have a slightly larger diameter than the workpiece located therein. Their shape may preferably be round, the length of the workpiece guides should correspond approximately to the length of the elastic clamping range.

Advantageous it is the elastomeric pressure chamber in an annular Container to be arranged, bounded on both sides by discs is held together by means of screw which is itself connects the workpiece guide on both sides. It is advantageous in this embodiment that this clamping device quickly and easily assembled from individual parts can, so that easy installation and transportability is guaranteed.

in the The following is the invention of four figures and one embodiment described. The figures show:

1 : Clamping and tensioning device in view

2 : Clamping and clamping device in side view without workpiece

3 : Cut AA the 2

4 : Cut AA the 2 with a clamped pipe and profile material

The 1 shows the clamping and tensioning device in view, in which a tubular container 5 on both sides by means of washers 6 is limited and by screws 7 and nuts 8th is held together, with workpiece guides on both sides 2 are arranged, in which the pipe and profile material can be inserted. Furthermore, the openings 9 shown for the pressure lines.

2 shows the side view of 1 from the advantageous length ratios between the elastic clamping range 1 , the length of the pressure chamber 5 and the material guide 2 be clear on both sides of it.

The 3 who have a cut AA of 2 shows, makes the structure of the clamping and clamping device in their interior clearly, the limits 10 of the elastically connected area 1 is shown without a workpiece.

The 4 shows a in the workpiece guide 2 inserted tube and profile material 3 in the elastic clamping range 1 ,

By the proposed solution makes it possible to and profile material gentle, fast, stable and reliable clamp, the switching times are less than 0.2 seconds. Cross sections of different shapes without moving the tool can be detected, even if complicated are such as U-profiles and thin-walled Material such as glass or wound carbon fiber material with low Forces is detected without it becoming one Damage to the surface comes.

1

elastic clamping range

2

Work guide

3

Pipe- and profile material

4

pressure chamber

5

tubular container

6

disc

7

screw connection

8th

mother

9

opening for pressure line

10

Limits of the elastically connected area of 1

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 29711184 U1 [0005]
• - DE 29614727 U1 [0006]
• - GB 2111172 A [0007]
• - FR 2418055 [0007]

Claims (4)

Clamping and clamping device for machining pipe and profile material consisting of a clamping element, which by means of elastic deformation by pressure produces a frictional connection with the part to be clamped, characterized in that on both sides of the clamping area ( 1 ) a workpiece guide ( 2 ) for pipe and profile material ( 3 ), wherein the pressure chamber ( 4 ) of the clamping area for clamping and holding the pipe and profile material ( 3 ) is pressurized by means of lines with compressed gas. Clamping and clamping device according to claim 1, characterized by an elastomeric pressure chamber, which through a tubular container ( 5 ) with discs arranged on both sides ( 6 ), which by means of screw connections ( 7 . 8th ) is held together, wherein on both sides workpiece guides ( 2 ) made of metal. Clamping and clamping device according to claims 1 and 2, characterized by joinable items ( 2 . 4 . 5 . 6 . 7 . 8th . 9 ). Clamping and clamping device according to claims 1 to 3, characterized in that the length of the elastic clamping region ( 1 ) in about the length of the workpiece guide ( 2 ) on each page.