Machine tool comprising a punching device and a laser machining device

Patent metadata

Field	Value
Publication number	US-10010972-B2
Application number	US-201615235416-A
Country	US
Kind code	B2
Filing date	Aug 12, 2016
Priority date	Aug 13, 2015
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A machine tool for machining workpieces comprising a support structure, a punching device mounted on the support structure, and a laser machining device mounted on the support structure. The machine tool includes a suspension device provided between the punching device and the laser machining device to reduce the laser machining device from being stimulated to move unintentionally due to the operation of the punching device. The suspension device has a spring rate which can be adjusted by a laser positioning device. The laser positioning device can move the laser machining device relative to the workpiece into a functional position and also into a position remote from the functional position. The spring rate of the suspension device is adjusted such that the functional position of the laser machining device is assigned a higher spring rate than that assigned to the position of the laser machining device remote from the functional position.

First claim

What is claimed is:

1. A machine tool for machining workpieces, the machine tool comprising:
a support structure;
a punching device mounted on the support structure and configured to punch an aperture in a workpiece;
a laser machining device mounted on the support structure and configured to laser-machine the workpiece, the laser machining device and the punching device connected to one another by the support structure;
a laser positioning device configured to position the laser machining device with respect to the workpiece, the laser positioning device configured to move the laser machining device by an activation movement into a functional position for laser machining and configured to move the laser machining device into a position remote from the functional position; and
a suspension device having a spring rate, the suspension device configured to support the laser machining device on the support structure so as to reduce movement of the laser machining device caused by an operation of the punching device,
wherein the laser positioning device is configured to adjust the spring rate of the suspension device such that the suspension device has a higher spring rate when the laser machining device is positioned in the functional position than the spring rate of the suspension device when the laser machining device is positioned in the position remote from the functional position.

2. The machine tool of claim 1 , wherein the suspension device comprises a spring to support the laser machining device on the support structure, wherein the spring has a spring length in a direction in which the laser machining device is supported by the suspension device, wherein the spring rate of the suspension device is configured to be adjusted by the laser positioning device by a change of the spring length of the spring such that the spring length is reduced in the functional position of the laser machining device relative to the spring length in the position of the laser machining device that is remote from the functional position, whereby the spring of the suspension device is compressed in the functional position of the laser machining device.

3. The machine tool of claim 2 , wherein a support structure-side device stop which acts in the direction of the activation movement is provided for the laser machining device, on which stop the laser machining device positioned in the functional position is supported in the direction of the activation movement, in that the laser machining device is supported on a support structure-side spring brace in the opposite direction to the activation movement by means of the spring of the suspension device, and in that, when the laser machining device is supported on the support structure-side device stop in the direction of the activation movement in the functional position, the spring of the suspension device is compressed by means of the laser positioning device.

4. The machine tool of claim 3 , wherein the laser positioning device comprises a support structure-side drive element which is assigned to the support structure, and a device-side drive element which is connected for movement to the laser machining device, which can be driven, and which interacts with the support structure-side drive element,
it being possible to move the device-side drive element of the laser positioning device relative to the support structure-side drive element of the laser positioning device, and the laser machining device thus being movable to perform the activation movement,
the support structure-side drive element of the laser positioning device and, by means of said element, the device-side drive element and the laser machining device, being supported on the support structure in the opposite direction to the activation movement of the laser machining device by means of the spring of the suspension device,
it being possible, with the laser machining device supported in the functional position on the support structure-side device stop in the direction of the activation movement, to move the support structure-side drive element relative to the device-side drive element in the opposite direction to the activation movement so as to compress the spring of the suspension device.

5. The machine tool of claim 4 , wherein the laser machining device is configured to be moved along a laser positioning axis via the laser positioning device into the functional position by the activation movement and also, in the opposite direction to the activation movement, into the position remote from the functional position,
wherein the device-side drive element of the laser positioning device is configured to move relative to the support structure-side drive element of the laser positioning device,
wherein the support structure-side drive element and, via the support structure-side drive element, the device-side drive element, and the laser machining device being supported on the support structure along the laser positioning axis in the opposite direction to the activation movement of the laser machining device by the spring of the suspension device, and
wherein the support structure-side drive element is configured to be moved relative to the device-side drive element along the laser positioning axis in the opposite direction to the activation movement so as to compress the spring of the suspension device, with the laser machining device supported in the functional position on the support structure-side device stop.

6. The machine tool of claim 5 , wherein the laser positioning device is configured as a piston-cylinder unit, wherein a cylinder of the piston-cylinder unit extends along the laser positioning axis and is configured as the device-side drive element, and a piston of the piston-cylinder unit that is movably guided in the cylinder along the laser positioning axis is configured as the support structure-side drive element of the piston-cylinder unit.

7. The machine tool of claim 6 , wherein the piston-cylinder unit is designed as a pneumatic piston-cylinder unit.

8. The machine tool of claim 4 , wherein the support structure-side drive element, the device-side drive element via the support structure-side drive element, and the laser machining device are supported on the support structure in the direction of the activation movement of the laser machining device by an additional spring of the suspension device.

9. The machine tool of claim 3 , wherein the support structure-side device stop for the laser machining device on the side remote from the side of the support of the laser machining device forms the support structure-side spring brace on which the spring of the suspension device is supported in the opposite direction to the activation movement of the laser machining device.

10. The machine tool of claim 1 , wherein the support structure is configured to move conjointly with the punching device and with the laser machining device on a machine frame of the machine tool in a direction transverse to a direction of the activation movement of the laser machining device.

Assignees

• Trumpf Werkzeugmaschinen Gmbh Co Kg

Inventors

• Traenklein Dennis

Classifications

• B23K2101/18

  Sheet panels · CPC title

• B26F1/38

  Cutting-out; Stamping-out · CPC title

• B23K26/0869

  Devices involving movement of the laser head in at least one axial direction · CPC title

• B23K37/0241

  Attachments between the welding or cutting element and the carriage · CPC title

• B23P23/04 Primary

  for both machining and other metal-working operations · CPC title