Device and method for monitoring the condition of protective glass in a build plate system, and build plate system for additive manufacturing methods.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- DMG MORI ADDITIVE GMBH
- Filing Date
- 2023-12-11
- Publication Date
- 2026-06-09
AI Technical Summary
【0049】 露光品質をさらに向上させるために、露光デバイスは、光センサデバイスによって検出された物体平面の照明も連続的にもしくはパルス方式で実行するように、または、少なくとも露光デバイスの機械的再配向によって照明に使用される光の入射角を効率的に適合させるようにさらに構成することができる。同等に、複数の露光光源またはそれに結合された光学素子を提供することもでき、または光センサデバイスと同等に、検出された物体平面の所定の部分領域のみを露光デバイスによって照明することができ、その結果、特に高い露光強度が可能になる。
Smart Images
Figure 2026518480000001_ABST
Abstract
Claims
1. A fabrication system (1) for forming a workpiece (26) by exposing powder material and / or workpiece elements, wherein the fabrication system (1) At least one light source (4) for irradiating the powder material (18) and / or processed piece elements provided in the processing chamber (12), An optical path (14) generated by the light source (4) extends into the processing chamber (12) of the molding system (1) through a protective glass (10), wherein the protective glass (10) is provided to protect the optical path (14) from damage and / or contamination. At least one exposure device (L1 to L9) for exposing an object plane (30) associated with the protective glass (10) of the molding system (1) Equipped with, The exposure device (L1 to L9) surrounds the protective glass (10) at least partially, preferably completely, and comprises a plurality of light-emitting diodes (LEDs) in the fabrication system (1).
2. The molding system (1) according to claim 1, wherein the LED is positioned on the protective glass (10) to directly expose the object plane (30) in the lateral direction.
3. The exposure device (L1 to L9) comprises an LED strip with a diffuser incorporated into it, and / or the diffuser is positioned between the LED strip (L1 to L9) and the side surface of the protective glass, according to at least one of the preceding claims, the fabrication system (1).
4. A fabrication system (1) according to at least one of the preceding claims, wherein at least some of the emission wavelengths of the LEDs are in the range of 520 to 522 nm and have a preferred maximum width at half maximum of 32 nm, and / or the colored LEDs are arranged such that the light for exposing the object plane (30) is green, and / or the LEDs have white light.
5. The molding system (1) according to at least one of the preceding claims, wherein the emission angle of the LED is 120° or 180°, or within the range of 120° to 180°.
6. A molding system (1) according to at least one of the preceding claims, wherein the same number of LEDs are arranged on each side of the protective glass (10) in order to uniformly expose the object plane (30).
7. The fabrication system (1) according to at least one of the preceding claims, comprising a camera sensor for detecting the object plane (30), wherein the camera sensor has the highest quantum efficiency within the wavelength range of 520 to 522 nm, the LEDs of the exposure device (L1 to L9) are configured to emit light having a wavelength of 520 nm, and / or the camera sensor has the highest quantum efficiency within the range of green light.
8. The fabrication system (1) according to at least one of the preceding claims, wherein the maximum value of the quantum efficiency of the camera sensor corresponds to the emission wavelength of the LED, and is preferably 520 nm.
9. A fabrication system (1) according to at least one of the preceding claims, wherein a bandpass filter is mounted in front of the camera lens, and the bandpass filter is adapted to the emission wavelength of the LED to filter an external light source.
10. The exposure device (L1 to L9) comprises LEDs uniformly arranged on a printed circuit board (32), the distance between adjacent LEDs is a maximum of 20 mm, and the power consumption is 11.7 W / m, according to at least one of the preceding claims, the fabrication system (1).
11. The molding system (1) according to at least one of the preceding claims, wherein the variation in the light intensity of the LED does not exceed a predetermined value of ±15%, particularly preferably ±10%.
12. The lighting is operated at a constant voltage of 24V, in the molding system (1) according to at least one of the preceding claims.
13. A fabrication system (1) according to at least one of the preceding claims, wherein a predetermined value of the luminous flux of the LED is in the range of 1,000 to 1,400 lm / m, and / or the LED is formed as a chip-on-board LED (COB LED) without a lens portion.
14. A method for determining the condition, particularly the condition of soiling and / or damage, of a protective glass (10) of an optical interaction-based molding system as described in at least one of the preceding claims, Exposing the object plane (30) with the exposure devices (L1 to L9), The camera sensor detects the light intensity value of the object plane (30) of the protective glass (10), and analyzes the detected light intensity value to identify damage and / or contamination, and / or The system operator visually inspects the protective glass (10) using the exposure devices (L1 to L9) which are operated to detect damage and / or contamination of the protective glass (10). Methods that include...
15. The process includes detecting the object plane (30) associated with the protective glass (10) of the molding system using the camera sensor, by using simultaneous exposure of the object plane (30) by the exposure device, and / or The method according to claim 14, wherein the detected object plane (30) is divided into a plurality of evaluation areas, and each of the evaluation areas is independently evaluated to determine the degree of damage or contamination of the protective glass (10).