Laser machining head

Patent metadata

Field	Value
Publication number	US-2016339541-A1
Application number	US-201515111107-A
Country	US
Kind code	A1
Filing date	Feb 5, 2015
Priority date	Feb 6, 2014
Publication date	Nov 24, 2016
Grant date	—

Abstract

The invention relates to a laser machining head for machining a workpiece with a laser beam, having a mounting, beam-shaping optics, which are mounted on the mounting such that they can be displaced in the longitudinal direction of the laser beam. In order largely to avoid contamination of the optics and in order to hold the optics securely in their adjusted position, even if high inertial forces occur as a result of higher accelerations, a belt drive is provided for displacing the optics.

First claim

1 - 12 . (canceled)

13 . A laser machining head for machining a workpiece with a laser beam, having a mounting, beam-shaping optics, which are mounted on the mounting such that they can be displaced in the longitudinal direction of the laser beam, and a belt drive for displacing the optics, the belt drive has a belt drum which is rotatably mounted on the mounting and which can be driven by a motor, wherein the ratio of belt thickness to the belt drum radius is less than 0.05.

14 . The laser machining head as claimed in claim 13 , wherein the motor is a brushless DC motor or a stepping motor.

15 . The laser machining head as claimed in claim 13 , wherein the ratio of belt thickness to the belt drum radius is less than 0.03, in particular less than 0.01.

16 . The laser machining head as claimed in claim 13 , wherein the optics are held on a carriage which is mounted on the mounting such that it can be displaced in the longitudinal direction of the laser beam and which has two ends spaced apart from each other in the direction of movement, a first belt is fixed by its one end to the one end of the carriage and is wound with its other end around the belt drum and is fixed to the latter, and a second belt is fixed by its one end to the other end of the carriage and is wound with its other end around the belt drum and is fixed to the latter.

17 . The laser machining head as claimed in claim 16 , wherein the first and the second belt are wound around the belt drum beside each other, seen in the axial direction of the drum.

18 . The laser machining head as claimed in claim 16 , wherein a first belt is arranged between two second belts.

19 . The laser machining head as claimed in claim 18 , wherein the sum of the widths of the two second belts is equal to or greater than the width of the first belt.

20 . The laser machining head as claimed in claim 18 , wherein the two second belts are equally wide.

21 . The laser machining head as claimed in claim 13 , wherein the first and second belts have the same thickness, which lies in the range from 0.1 mm to 0.01 mm, preferably from 0.08 mm to 0.02 mm, in particular from 0.06 mm to 0.04 mm.

22 . The laser machining head as claimed in claim 13 , wherein the first and second belts consist of steel, in particular spring steel or the like.

23 . The laser machining head as claimed in claim 13 , wherein the first and second belts are formed as first and second belt sections of a one-piece belt.

24 . The laser machining head as claimed in claim 13 , wherein the mounting for supporting the optics that can be displaced in the longitudinal direction of the laser beam is held on a slide-in unit which can be inserted into the laser machining head.

Assignees

• Precitec Gmbh & Co Kg

Inventors

• Spoerl Georg
• Loose Christian

Classifications

• B23K26/702

  Auxiliary equipment · CPC title

• B23K26/064 Primary

  by means of optical elements, e.g. lenses, mirrors or prisms · CPC title

• G02B7/102

  controlled by a microcomputer (cameras with interchangeable lenses G03B17/14) · CPC title

• B23K26/0665

  by beam condensation on the workpiece, e.g. for focusing · CPC title

• B23K37/02

  Carriages for supporting the welding or cutting element · CPC title