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CN-121986340-A - Method for creating a manufacturing plan for additive manufactured objects by means of 3D printing

CN121986340ACN 121986340 ACN121986340 ACN 121986340ACN-121986340-A

Abstract

The invention relates to a method (100) for creating a manufacturing plan (50) for additive manufacturing of an object (20) by means of 3D printing by means of at least one print head (40) of a 3D printer (30), the method having at least the steps of providing (110) a three-dimensional model (21) of the object (20) to be manufactured, and optimizing (120) the manufacturing plan (50) such that a filling process (130) of the print head (40) is arranged into the manufacturing plan (50) in accordance with the three-dimensional model (21) of the object (20).

Inventors

  • H. Yangle
  • T. SCHNEIDER

Assignees

  • 罗伯特·博世有限公司

Dates

Publication Date
20260505
Application Date
20241002
Priority Date
20231009

Claims (10)

  1. 1. A method (100) for creating a manufacturing plan (50) for additive manufacturing an object (20) by means of 3D printing by means of at least one print head (40) of a 3D printer, the method having the steps of: -providing (110) a three-dimensional model (21) of the object (20) to be manufactured, and -Optimizing (120) the manufacturing plan (50) such that a filling process (130) of the print head (40) is arranged into the manufacturing plan (50) according to the three-dimensional model (21) of the object (20).
  2. 2. The method (100) of claim 1, wherein optimizing (120) the manufacturing plan (50) includes: -determining (140) a volume (41) of the printhead (40), wherein the volume (41) determines an amount of printable material (42) provided per printing process; -determining (150) a geometric property (1, 2, n) of the three-dimensional model (21), wherein the geometric property (1, 2, n) can influence a component quality of the object (20); -solving (160) segments (B1, B2,) Bn) based on the three-dimensional model (21) and the geometrical properties (1, 2,. -%, n); -determining (170) the filling process (130) in the manufacturing plan (50).
  3. 3. The method (100) of claim 2, wherein, -Arranging respective filling processes (130) into the manufacturing plan (50) before printable material (42) provided by each printing process, which is predefined by a maximum volume (41) of the printhead (40), is emptied.
  4. 4. The method (100) according to any of the preceding claims, wherein, The geometrical properties (1, 2,..n) are at least differentiated into a visible region and an invisible region of the object (20).
  5. 5. The method (100) according to any of the preceding claims, wherein, -Arranging the filling process (130) in the manufacturing plan (50) such that a printing process following the filling process (130) is preferably started at the beginning of a new section (B1, B2, bn).
  6. 6. The method (100) according to any one of claims 1 to 4, wherein, If a printing process following the filling process (130) cannot be started at the beginning of a new section (B1, B2, etc.), the filling process (130) in the manufacturing plan (50) is arranged such that a subsequent printing process is started in the invisible area of the object (20).
  7. 7. A method (200) of additive manufacturing of an object (20) by means of 3D printing, the method having the steps of: -solving from at least one preset construction specification of the object (20) and/or photogrammatically calculating (210) a three-dimensional model (21) of the object (20) from a plurality of photographs of a three-dimensional sample of the object (20); -creating (220) a manufacturing plan (50) for manufacturing the object (20) using the method (100) according to any one of claims 1to 6, based on the three-dimensional model (21); -delivering (230) the manufacturing plan (50) to the 3D printer (30); -creating (240) the object (20) by the 3D printer (30) according to the manufacturing plan (50).
  8. 8. A computer program comprising machine readable instructions which, when executed on one or more computers, cause the one or more computers to perform the method (100) according to any one of claims 1 to 6.
  9. 9. A machine readable data carrier or download product having a computer program according to claim 8.
  10. 10. A computer having a computer program according to claim 8 and/or having a machine-readable data carrier and/or a downloaded product according to claim 9.

Description

Method for creating a manufacturing plan for additive manufactured objects by means of 3D printing Technical Field The invention relates to a method for additive manufacturing of objects from any starting material, such as plastic or metal, by means of 3D printing. Background In additive manufacturing of objects by means of 3D printing, a three-dimensional model of the object is typically converted into a specific manufacturing plan for the object using a so-called microtome (Slicer). The manufacturing plan is directly understood and executed by the 3D printer. A number of parameters may be set in the microtome. For example, it may be selected which starting material should be used, which degree of filling to fill the cavity inside the object, which temperature the starting material is heated to, or which speed to move the printhead that adds material to the object. DE 10 2020 208 175 A1 discloses a method for creating a manufacturing plan for additive manufacturing objects by means of 3D printing, wherein a three-dimensional model of the object to be manufactured is provided. Furthermore, a print head for a 3D printer is known from DE 10 2021 202 649 A1, which is suitable for carrying out a method for providing printable melt for operating a print head for a 3D printer, wherein the process flow for filling the print head is repeated during the print preparation and optionally repeated during the printing of the component. It is known that depending on the print head, the filling or filling process is always performed when the print head has, for example, reached a predefined piston stroke, but at the latest when the print head volume is empty. This operation is repeated for the duration of the entire printing process. Disclosure of Invention The invention is based on the task of providing a method for creating a production plan for additive manufacturing objects by means of 3D printing by means of at least one print head of a 3D printer, wherein the method optimizes the production plan and improves the component quality of the printed objects. Within the framework of the invention, a method for creating a manufacturing plan for additive manufactured objects by means of 3D printing through at least one print head of a 3D printer is developed. The method according to the invention for creating a manufacturing plan for additive manufacturing of an object by means of 3D printing by means of at least one print head of a 3D printer comprises at least the steps of providing a three-dimensional model of the object to be manufactured and optimizing the manufacturing plan such that a filling process of the print head is arranged into the manufacturing plan according to the three-dimensional model of the object. Hereby is achieved that the process parameters are changed such that they are object-or component-dependent and the manufacturing plan is improved in an advantageous manner. The manufacturing plan is optimized such that the filling process of the print head is arranged into the manufacturing plan according to the three-dimensional model of the object, ensuring a shift of the filling process within the manufacturing plan optimized for the component, whereby the print layer can be applied into a position optimized for the component. The method according to the invention advantageously avoids visible differences in the print layer, which might be caused by an interrupted printing process during the filling process. Thereby, the component characteristics can be optimized, and the component appearance and layer adhesion of the object can be improved. The filling process is performed in particular in a filling pause and the printing process or printing program starts in particular with a printing start. The filling process may also be referred to as refilling (Refill). Typically, a software, the so-called microtome software, is used as a medium (VERMITTLER) between the 3D model and the 3D printer. Here, the software prepares a 3D model for the printing process, where various parameters (e.g., extrusion speed, printhead speed, temperature, wall thickness, fill parameters, etc.) can be set. The method according to the invention extends these settings in respect of the filling process such that the filling processes are arranged in an advantageous manner in terms of components. The change to the manufacturing plan is additionally aimed at achieving the goal of optimizing the manufacturing cost of the object and/or the printing time for the manufactured object. In a preferred embodiment of the method, optimizing the production plan comprises: Determining a volume of the printhead, wherein the volume determines an amount of printable material provided by each printing process; Obtaining geometric properties of the three-dimensional model, wherein the geometric properties can have an effect on the component quality of the object; solving for a segment based on the three-dimensional model and the geometric property, and T