公开(公告)号：US20210362428A1

公开(公告)日：2021-11-25

申请号：US16606741

申请日：2018-04-30

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Sunil Kothari ,  Juan Carlos Catana ,  Tod Heiles

IPC: B29C64/393 ,  B29C64/112 ,  G06T7/00 ,  G06T7/66

Abstract: In some examples, with respect to region of interest monitoring and control for additive manufacturing, a blob detection analysis may be performed on first and second component images associated with additive manufacturing of a component, and blobs that remain a same shape and include same centroids on the first and second component images may be identified. A further blob detection analysis may be performed on first and second thermal images associated with the first and second component images, and a determination may be made as to whether one of the identified blobs includes a same shape and a different centroid between the first and second thermal images. Based on a determination that the one of the identified blobs includes the same shape and the different centroid, an indication of a thermal camera misalignment associated with the additive manufacturing may be generated.

公开(公告)号：US20210162662A1

公开(公告)日：2021-06-03

申请号：US17047297

申请日：2018-08-23

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Tod Heiles ,  Gary J Dispoto

IPC: B29C64/209 ,  B29C64/393

Abstract: An example system includes an array of nozzles to deposit a print material for printing a three-dimensional object, a thermal sensor to determine a thermal characteristic at multiple locations of the print material, and a controller. The controller includes a gradient identification portion to identify a location on the print material having a gradient of the thermal characteristic being greater than a predetermined threshold. The controller further includes a nozzle identification portion to identify a nozzle associated with the identified location as an anomalous nozzle.

公开(公告)号：US20230226768A1

公开(公告)日：2023-07-20

申请号：US17576286

申请日：2022-01-14

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Jacob Tyler Wright ,  Maria Fabiola Leyva Mendivil ,  Jun Zeng

IPC: B29C64/393 ,  G06T3/40

CPC classification number: B29C64/393 ,  G06T3/4046 ,  B33Y50/02

Abstract: Examples of methods are described. In some examples, a method includes generating, using a first branch of a machine learning model, a first agent map based on a layer image. In some examples, the method includes generating, using a second branch of the machine learning model, a second agent map. In some examples, the first agent map and the second agent map indicate printing locations for different agents.

公开(公告)号：US20230038935A1

公开(公告)日：2023-02-09

申请号：US17387713

申请日：2021-07-28

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Lei Chen ,  Maria Fabiola Leyva Mendivil ,  Jacob Tyler Wright ,  Jun Zeng

IPC: G06N3/08 ,  G06T3/00

Abstract: Examples of methods are described. In some examples, a method includes determining, using a variational autoencoder model, a latent space representation. In some examples, the latent space representation is of object model data. In some examples, the method includes predicting manufacturing powder degradation. In some examples, predicting the manufacturing powder degradation is based on the latent space representation.

公开(公告)号：US11511534B2

公开(公告)日：2022-11-29

申请号：US16606767

申请日：2018-03-19

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Sunil Kothari ,  Juan Carlos Catana ,  Tod Heiles ,  Jun Zeng ,  Gary J. Dispoto

IPC: B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/153 ,  B29C64/393 ,  B29C64/165 ,  B22F10/30

Abstract: In an example, an apparatus includes an image processing system, a print engine, and a vision system. The image processing system generates electronic signals based on a model of an object to be fabricated using an additive manufacturing process. The print engine performs the additive manufacturing process in a plurality of passes based on the electronic signals. The vision system acquires a plurality of thermal images of the plurality of passes and assigns individual passes to individual images based on data acquired during a build of a calibration object by the additive manufacturing process. The print engine may further include a material coater to spread a powder coating material, a plurality of fluid ejection devices to eject a fusing agent, and an emitter to emit energy to fuse the fusing agent and the powder coating material into a layer of the object to be fabricated.

公开(公告)号：US20220288854A1

公开(公告)日：2022-09-15

申请号：US17824069

申请日：2022-05-25

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Wesley R. Schalk ,  Jun Zeng ,  Francisco Oblea ,  Gary Dispoto

IPC: B29C64/357 ,  B33Y40/00 ,  G06F30/20 ,  B22F3/00 ,  B29C64/153

Abstract: Examples disclosed herein relate to 3D printer fresh and recycled powder supply management. In one implementation, a processor estimates fresh and recycled powder use and recycled powder creation by a 3D printer based on a set of print jobs. The processor may coordinate fresh and recycled powder resources based on the powder estimate and stored information about powder resources

公开(公告)号：US11440260B2

公开(公告)日：2022-09-13

申请号：US16098098

申请日：2016-07-19

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Wesley R. Schalk ,  Jun Zeng ,  Francisco Oblea ,  Gary Dispoto

IPC: B29C64/357 ,  B33Y40/00 ,  G06F30/20 ,  B22F3/00 ,  B29C64/153

Abstract: Examples disclosed herein relate to 3D printer fresh and recycled powder supply management. In one implementation, a processor estimates fresh and recycled powder use and recycled powder creation by a 3D printer based on a set of print jobs. The processor may coordinate fresh and recycled powder resources based on the powder estimate and stored information about powder resources.

公开(公告)号：US20220080672A1

公开(公告)日：2022-03-17

申请号：US17420074

申请日：2019-01-10

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Kelly Ronk ,  Anthony Powell ,  Jun Zeng ,  Md Abdullah Al Hafiz Khan ,  Tod Heiles ,  Goffril Obegi

IPC: B29C64/393 ,  B29C64/379 ,  G06T7/00 ,  B33Y50/02 ,  B33Y30/00

Abstract: A method of custom print mode generation in a three-dimensional (3D) printing device may include printing a plurality of parts with a plurality of 3D printing devices, the parts each being printed using different process parameters, and capturing a plurality of images of the parts. The method may also include, with an image analysis module, analyzing the images to classify the parts into a plurality of defect gradings, and adjusting a number of the process parameters based on characteristics of the parts identified by a user as undesirable. The examiner may also include, with a recommending module, creating a custom print mode based on the parts defect gradings and adjusted process parameters.

公开(公告)号：US20210362402A1

公开(公告)日：2021-11-25

申请号：US17256683

申请日：2019-01-23

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Tod Heiles ,  Luke Bockman ,  Gary J. Dispoto ,  Md Abdullah Al Hafiz Khan

IPC: B29C64/153 ,  B29C64/218 ,  B29C64/273 ,  B29C64/393 ,  B29C64/209 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: A system for detecting three-dimensional (3D) part drag includes a layer deposition device, and a sensor to detect a change in a process parameter associated with the operation of the layer deposition device within a 3D part build region of a 3D printing device on which a part is built, the change in a process parameter indicating part drag.

公开(公告)号：US20210291456A1

公开(公告)日：2021-09-23

申请号：US16472929

申请日：2017-04-19

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Tod Heiles ,  Juan Carlos Salazar ,  Goffril Obegi ,  Jun Zeng ,  Gary J. Dispoto

IPC: B29C64/393 ,  B29C64/295 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: A control and feedback technique to determine the proper location of powder control temperature regions includes detecting solid parts having specified shape and thermal characteristics. The solid parts are generated by a 3D printer. The solid parts include powder material fused on a layer by layer basis. A powder control temperature region is selected in each layer of powder material, wherein the region is located in unfused powder material adjacent to the solid parts, and wherein the region is selected based on characteristics of the shape of a build area and thermal imaging associated with any of a structural formation of the solid parts adjacent to the region, and an amount of thermal energy radiated by the solid parts adjacent to the region. The amount of thermal energy to cause fusing of the powder material on each subsequent layer is modified based on location of the powder control temperature region.