# US 11,305,384 B2 · Cartesian positioning device and laser-machining head having same

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- Number: US 11,305,384 B2
- Document ID: US11305384B2
- Status: Granted
- Kind: B2
- Application number: 16/603,101
- Filed: 2018-04-05
- Published: 2020-04-09
- Granted: 2022-04-19
- Earliest claimed: 2017-04-05
- Assignees: Precitec GmbH & Co. KG
- Applicants: Precitec GmbH & Co. KG
- Inventors: Peter Schubert
- Web page: https://patentgrep.com/patent/US11305384B2

## CPC

- B23K 26/702: {Auxiliary equipment}
- G02B 7/004: {Manual alignment, e.g. micromanipulators}
- G02B 7/023: {permitting adjustment}
- G02B 27/09: Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for {(adapting the beam shape of a laser diode G02B19/0052; adapting the beam shape of an LED G02B19/0061; coupling into light guides using intermediate optical elements G02B6/4204; beam shaping specially adapted for lasers H01S3/005)}
- G05B 19/402: characterised by control arrangements for positioning, e.g. centring a tool relative to a hole in the workpiece, additional detection means to correct position (G05B19/19 takes precedence)
- B23K 26/70: Auxiliary operations or equipment
- G05B 2219/45165: Laser machining
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G)

## Abstract

According to the invention, a Cartesian positioning device for positioning an optics includes an optics socket for holding the optics; a y actuating element for linear movement of the optics socket in the y direction, the y actuating element having a y slider at one end; an x actuating element for linear movement of the optics socket in the x direction, the x actuating element having an x slider at one end; wherein the x actuating element and the y actuating element are arranged on a support element and adjustable along the y direction. Furthermore, a laser machining head for machining a workpiece by means of a laser beam includes such a Cartesian positioning device for positioning an optics, the optics being arranged in a beam path of the laser machining head.

## Claims

### Claim 1

A Cartesian positioning device for positioning an optics for a laser machining head, comprising:
a support element;
an optics socket for holding the optics;
a y slider arranged on the support element, the y slider being movable in a y direction;
an x slider arranged next to the y slider on the support element, the x slider being movable in the y direction;
a single linear guide unit extending in the x direction and directly interconnecting the optics socket to the y slider such that the optics socket is movable in the x direction relative to the y slider by the linear guide unit;
a L-shaped element with one or more guide slots or guide pins for translating y movement to x movement, the element interconnecting the optics socket with the x slider such that movement of the x slider in the y direction is translated into movement of the optics socket in the x direction;
wherein the optics socket is connected to the x slider only by the element for translating y movement to x movement and the optics socket is connected to the y slider only by the single linear guide unit.

### Claim 2 (depends on 1)

The Cartesian positioning device according to claim 1, wherein said single linear guide unit connects said y actuating element to said optics socket in a manner invariant with respect to a tensile or compressive load along the y axis.

### Claim 3 (depends on 1)

The Cartesian positioning device according to claim 1, wherein said x slider and/or said y slider is guided along at least one slider guide element.

### Claim 4 (depends on 1)

The Cartesian positioning device according to claim 1, wherein at least one spring element is connected to said optics socket and said support element.

### Claim 5 (depends on 1)

A laser machining head for machining a workpiece by means of a laser beam, comprising:
a Cartesian positioning device for positioning an optics according to claim 1;
wherein said optics is arranged in a beam path of said laser machining head.

### Claim 6 (depends on 5)

The laser machining head according to claim 5, wherein an optical axis of the laser machining head extends in a z direction perpendicular to the x direction and the y direction.

### Claim 7 (depends on 1)

The Cartesian positioning device of claim 1, wherein the element for translating y movement to x movement comprises a transmission element arranged on the support element and movable in the x direction relative to the support element, the transmission element interconnecting the optics socket with the x slider such that movement of the x slider in the y direction is translated into movement of the optics socket in the x direction.

### Claim 8 (depends on 7)

The Cartesian positioning device of claim 7, wherein:
the x slider has a slot defined therein, the slot extending at an angle to the x and y directions;
the optics socket having a slot defined therein, the slot extending in the y direction; and
the transmission element interconnects the slot in the optics socket with the slot in the x slider such that movement of the x slider in the y direction is translated into movement of the optics socket in the x direction.

### Claim 9 (depends on 8)

The Cartesian positioning device of claim 8, wherein the transmission element having a first and a second pin extending therefrom, the first pin engaging the slot in the x actuating unit and the second pin engaging the slot in the optics socket such that movement of the x actuating unit in the y direction pushes the first pin in the x direction, thereby moving the second pin and the optics socket in the x direction.

### Claim 10 (depends on 1)

The Cartesian positioning device of claim 1, further comprising:
a y actuating element disposed on the support, the y actuating element operable to move the y slider in the y direction; and
an x actuating element disposed on the support, the x actuating element operable to move the x slider in the y direction.

### Claim 11 (depends on 10)

The Cartesian positioning device according to claim 10, wherein a specific value for the linear movement in the y direction or x direction is assigned to an adjustment value of said y actuating element or said x actuating element, respectively.

### Claim 12 (depends on 10)

The Cartesian positioning device according to claim 10, wherein the x actuating element and the y actuating element are arranged next to each other on the support element.

### Claim 13 (depends on 1)

The Cartesian positioning device of claim 1, wherein the element for translating y movement to x movement comprises a lever element.

### Claim 14 (depends on 13)

The Cartesian positioning device of claim 13, wherein the lever element is L-shaped.

### Claim 15 (depends on 13)

The Cartesian positioning device of claim 13, wherein the lever element is movably connected to said optics socket by a first guide unit and to said x slider by a second guide unit, wherein said first guide unit comprises a first guide pin and a first guide for guiding said optics socket in the y direction, and wherein said second guide unit comprises a second guide pin and a second guide for transmitting an adjusting movement of said x slider to the lever element.

### Claim 16 (depends on 15)

The Cartesian positioning device according to claim 15, wherein at least a part of said first guide unit is arranged on a fastening extension extending from said optics socket in the y direction.