Coordinate measuring machine having high-precision 3-D printing functionality

• US 9,803,966 B2
• Filed: 12/18/2014
• Issued: 10/31/2017
• Est. Priority Date: 12/20/2013
• Status: Active Grant

• Current Assignee: Hexagon Technology Center GmbH (Hexagon AB)
• Original Assignee: Hexagon Technology Center GmbH (Hexagon AB)
• Inventors: Pettersson, Bo, Siercks, Knut, Jordil, Pascal
• Primary Examiner(s): Fulton, Christopher
• Application Number:
  US14/575,286
• Publication Number:
  US 20150176956A1
• Time in Patent Office: 1,048 Days
• Field of Search: 33503
• CPC Class Codes: B29C 64/112 using individual droplets, e.g. from jetting heads
• CPC Class Codes: G01B 21/04 by measuring coordinates of points
• CPC Class Codes: G01B 5/008 using coordinate measuring machines

Abstract

Method for building up an object (25) by means of a coordinate measuring machine (10), wherein the coordinate measuring machine (10) has at least one control unit and one drive unit for the controlled movement of an instrument carrier (19) in relation to a base (12) and the instrument carrier (19) is implemented for carrying at least one measuring sensor and production tool (21a-b), which are each modularly attachable in particular, both alone in each case or in combination. In the scope of the method, based on digital model data which represent the object (25), controlled guiding and in particular alignment of the production tool (21a-b) carried in this case by the instrument carrier (19) and precisely-positioned material application and/or fixation, controlled in dependence on a respective production tool position and in particular alignment, by means of the production tool (21a-b) are performed, in particular wherein building up the object (25) is performed by layer-by-layer material application and/or fixation.

Claims

1. A method for building up an object using a coordinate measuring machine, the object having associated digital model data, the method comprising:

providing a coordinate measuring machine having at least one control unit and one drive unit for the controlled movement of an instrument carrier in relation to a base, the instrument carrier configured to carry one or both of a measuring sensor and a production tool, each of the at least one measuring sensor and production tool being modularly attachable either alone or together to the instrument carrier;

controllably guiding the instrument carrier carrying the production tool, controllably guiding comprising aligning the production tool carrying the instrument carrier based on the digital model data; and

controlling the production tool to perform precisely-positioned material application or material fixation in a manner that depends on the position and alignment of the production tool, controlling the production tool being based on the digital model data,

wherein controlling the production tool causes the object to be built up by one or both of layer-by-layer material application and fixation,

wherein building up the object is performed by one or both of a) precisely positioned material application and b) fixation with a precision corresponding to the position determination for at least one measurement point in the scope of a surface scanning executable by the production tool of the coordinate measuring machine.

2. The method according to claim 1 further comprising using the measurement sensor to surface scan with a position determination for at least one measurement point, the measurement sensor being carried by the instrument carrier on the production tool, the measurement sensor comprising a tactile sensor or an optical sensor.

3. The method according to claim 2 wherein the measurement point is embodied by a surface point of at least a partially built-up state of the object, the method further comprising correcting the material application building up of the object in an automatically controlled manner depending on the position of the measurement point and depending on the digital model data for the object.

4. The method according to claim 2 wherein the measurement point is embodied by a surface point of a pattern object, the method further producing and/or updating the digital model data depending on the pattern object.

5. The method according to claim 2 wherein the measurement point is embodied by a surface point of a previously known reference body, the method further comprising updating by having a referencing of the instrument carrier position on the basis of the position determined on the reference body for the measurement point.

6. The method according to claim 1 wherein the instrument carrier has an associated mobility, the method further comprising at least one of the following acts:

positioning a defined rough body in a specific alignment and positioning with respect to the base and within a measurement volume defined by the mobility of the instrument carrier;

using the production tool to build up the object using precisely-positioned material application on the rough body, and

guiding the production tool along a defined path, wherein the path is derived from the digital model data.

7. The method according to claim 6 wherein the positioning is performed using a transport tool provided on the instrument carrier or production tool.

8. The method according to claim 1 further comprising at least one of the following acts:

using the production tool to produce a buildup of a base structure of the object by coarse application of the material;

adapting the base structure of the object by precisely-positioned surface modification of the at least partially built-up base structure, wherein adapting comprises using the production tool to perform a precisely-positioned fine application of the material for precise surface structuring, the production tool being implemented as a printing head and/or having at least one printing head; and

controlling a milling tool or processing laser to perform a surface ablation, the instrument carrier or the production tool carrying the modification tool.

9. The method according to claim 8 further comprising at least one of the following acts:

providing a coarse application printing unit for the coarse application, and providing a fine application printing unit for the fine application, the coarse application printing unit and the fine application printing unit arranged on the instrument carrier, or the production tool having the coarse application printing unit and the fine application printing unit, further performing an automatic change of the use of the printing units depending on the application to be executed, and

aligning the instrument carrier in dependence on the execution of the buildup or the adaptation of the base structure in such a manner that the production tool or the modification tool is aligned in a defined manner in a working alignment, which is provided for the material application or for the surface modification, in relation to the object surface, wherein the instrument carrier carries at least two printing heads.

10. A coordinate measuring machine for building up an object having associated digital model data, the coordinate measuring machine comprising:

a base;

an instrument carrier;

a control unit;

a drive unit for the controlled movement of the instrument carrier in relation to the base, the instrument carrier configured to carry at least one measuring sensor,

the coordinate measuring machine having a surface scanning mode for determining at least one measurement point position on a surface by touching the surface using the measuring sensor carried by the instrument carrier,

the instrument carrier also being configured to carry a production tool implemented for material application and/or fixation,

the coordinate measuring machine having an object buildup mode controlled based on digital model data, the production tool being carried by the instrument carrier for guidance and alignment, the coordinate measuring machine being configured so that the production tool material can be applied and/or fixed in a precisely-positioned manner depending on a respective production tool position and alignment,

the control unit being configured to execute the object buildup mode so that the object can be built up, layer-by-layer, based on the digital model data,

wherein the production tool is configured to be guided, positioned and aligned with a positioning precision provided in the scope of the surface scanning mode for the measuring sensor.

11. The coordinate measuring machine according to claim 10 wherein the production tool comprises one or more of a printing head implemented for material application, and a laser emitter for emitting a laser beam for material fixation by laser sintering.

12. The coordinate measuring machine according to claim 10 wherein the production tool has a coarse application printing unit and a fine application printing unit, wherein during execution of the object buildup mode the measuring sensor is configured to:

prepare a base structure of the object in a first phase of the object buildup mode using the coarse application printing unit; and

prepare a surface adaptation of the base structure in a second phase of the object buildup mode using the fine application printing unit.

13. The coordinate measuring machine according to claim 10 configured so that a defined rough body can be placed in a specific alignment and positioning with respect to the base and within a measurement volume, which is defined by a mobility of the instrument carrier, and the object can be built up by the precisely-positioned material application on the rough body in a layer-by-layer material application.

14. The coordinate measuring machine according to claim 10 configured so that the digital model data can be generated at least partially by executing the surface scanning mode.

15. The coordinate measuring machine according to claim 10 wherein the instrument carrier is configured to carry a modularly attachable modification tool, the modification tool comprising a milling tool or processing laser,

the coordinate measuring machine further having an object modification mode that can perform a material ablation on the object surface in a controlled manner using the modification tool carried by the instrument carrier.

16. The coordinate measuring machine according to claim 10 wherein the production tool includes at least one of the measuring sensor, a modification unit embodying the modification tool, and a cooling nozzle.

17. The coordinate measuring machine according to claim 10 wherein the instrument carrier is at least one of:

a) pivotable about at least one axis (A, B, X, Y, Z), and

b) configured to simultaneously carry at least the measuring sensor and the production tool.

18. The coordinate measuring machine according to claim 10 further comprising:

material guiding means for providing the material for building up the object, the material guiding means comprising one or both of a tubular line structure and a temperature-controlled pipe arrangement, the material guiding means at least one of;

connecting to the production tool and the material supply for the production tool for the material application, and

having an insulation or damping device with regard to a reduction of emission of thermal radiation.

19. A computer program product for use on a computer system for building up an object using a coordinate measuring machine having at least one control unit and one drive unit for the controlled movement of an instrument carrier in relation to a base, the instrument carrier configured to carry one or both of a measuring sensor and a production tool, each of the at least one measuring sensor and production tool being modularly attachable either alone or together to the instrument carrier, the object having associated digital model data, the computer program product comprising a tangible, non-transient computer usable medium having computer readable program code thereon, the computer program product comprising:

program code for controllably guiding the instrument carrier carrying the production tool, the program code for controllably guiding comprising program code for aligning the production tool carrying the instrument carrier based on the digital model data; and

program code for controlling the production tool to perform precisely-positioned material application or material fixation in a manner that depends on the position and alignment of the production tool, the program code for controlling the production tool being based on the digital model data,

wherein controlling the production tool causes the object to be built up by one or both of layer-by-layer material application and fixation.