Methods of repairing a periphery of a threaded hole of a part are provided. An embodiment of the method includes adding material to a region of the part including on a periphery of the threaded hole. New threads are formed in the added material. The new threads are continuous with existing threads formed in the hole.

A method for generating a path for wire arc additive manufacturing is provided in this disclosure, which relates to the technical field of additive manufacturing, and includes following steps: generating a model in which a three-dimensional model is established according to angle constraint of the wire arc additive manufacturing; layering the model in which the three-dimensional model is layered along a height direction; selecting discrete points in which a plurality of discrete points are selected according to curve curvature for different layers of the model; obtaining coordinates of the discrete points; determining a printing direction; obtaining coordinates of the discrete points and corresponding printing directions; and generating a control program. The method according to the disclosure is simple, has a wide application range, can satisfy printing of complex shapes, and can serve to well form for structures with maximum printing inclination of 60 degrees, thus improving forming effect of printing.

A method for generating a path for wire arc additive manufacturing is provided in this disclosure, which relates to the technical field of additive manufacturing, and includes following steps: generating a model in which a three-dimensional model is established according to angle constraint of the wire arc additive manufacturing; layering the model in which the three-dimensional model is layered along a height direction; selecting discrete points in which a plurality of discrete points are selected according to curve curvature for different layers of the model; obtaining coordinates of the discrete points; determining a printing direction; obtaining coordinates of the discrete points and corresponding printing directions; and generating a control program. The method according to the disclosure is simple, has a wide application range, can satisfy printing of complex shapes, and can serve to well form for structures with maximum printing inclination of 60 degrees, thus improving forming effect of printing.

The invention relates to a steel material which allows for components to be formed with low residual stress via additive manufacturing without pre- or post-heating. The steel material consists of a steel with the following composition, in wt. %: C: 0.28-0.65%, Co: <10.0, Cr: 3.5-12.5%, optionally Mo: 0.5-12.5%, wherein the sum of the content of Cr and Mo is 4-16%, the Ni equivalent Ni_eq calculated according to the formula Ni_eq [%]=30% C+% Ni+0.5% Mn from the C-content % C, the Ni-content % Ni, the Mn-content % Mn fulfills the condition (1) 10%≤Ni eq≤20%, and alongside C, optionally respectively up to 9% Mn and up to 4.5% Ni are provided to fulfill condition (1), wherein the Cr equivalent Cr_eq calculated according to the formula Cr_eq [mass]=% Cr+% Mo+1.5% S+0.5% Nb+2% XX from the CR-content Cr %, the Mo-content Mo %, the Si-content Si %, the Nb-content % Nb and the sum % XX of the contents of at least one element of the group “Sc, Y, Ti, Zr, Hf, V, Ta” fulfills the condition (2) 4% Cr_eq 16%, and optionally respectively up to 2% Si, up to 2% Nb or at least one element from the group “Sc, Y, Ti, Zr, Hf, V, Ta” are provided to fulfill condition (2), wherein the total proportion of elements of this group is at most equal to the mass fraction of 2%, which Ti must not exceed if Ti is the only element selected from the group consisting of “Sc, Y, Ti, Zr, Hf, V, Ta”, and wherein the rest of the steel consists of Fe and <0.5% impurities, including 0.025% P and 50.025% S. The steel material is suited, in particular as a powder, for LPBF or LMD methods and as wire for the WAAM method.

The invention relates to a steel material which allows for components to be formed with low residual stress via additive manufacturing without pre- or post-heating. The steel material consists of a steel with the following composition, in wt. %: C: 0.28-0.65%, Co: <10.0, Cr: 3.5-12.5%, optionally Mo: 0.5-12.5%, wherein the sum of the content of Cr and Mo is 4-16%, the Ni equivalent Ni_eq calculated according to the formula Ni_eq [%]=30% C+% Ni+0.5% Mn from the C-content % C, the Ni-content % Ni, the Mn-content % Mn fulfills the condition (1) 10%≤Ni eq≤20%, and alongside C, optionally respectively up to 9% Mn and up to 4.5% Ni are provided to fulfill condition (1), wherein the Cr equivalent Cr_eq calculated according to the formula Cr_eq [mass]=% Cr+% Mo+1.5% S+0.5% Nb+2% XX from the CR-content Cr %, the Mo-content Mo %, the Si-content Si %, the Nb-content % Nb and the sum % XX of the contents of at least one element of the group “Sc, Y, Ti, Zr, Hf, V, Ta” fulfills the condition (2) 4% Cr_eq 16%, and optionally respectively up to 2% Si, up to 2% Nb or at least one element from the group “Sc, Y, Ti, Zr, Hf, V, Ta” are provided to fulfill condition (2), wherein the total proportion of elements of this group is at most equal to the mass fraction of 2%, which Ti must not exceed if Ti is the only element selected from the group consisting of “Sc, Y, Ti, Zr, Hf, V, Ta”, and wherein the rest of the steel consists of Fe and <0.5% impurities, including 0.025% P and 50.025% S. The steel material is suited, in particular as a powder, for LPBF or LMD methods and as wire for the WAAM method.

The present invention relates to an additive manufacturing wire, containing, in terms of % by mass, 0%<Si≤2.0%, 0%<Mn≤6.0%, 3.0%≤Ni≤15.0%, 20.0%≤Cr≤30.0%, 1.0%≤Mo≤5.0%, 0%<N≤0.50%, with a balance being Fe and unavoidable impurities, in which C≤0.10% is satisfied, and 27<A<67 is satisfied, when Cr.sub.eq is defined as Cr+Mo+1.5Si+0.5(Nb+W)+2(Ti+Al), Ni.sub.eq is defined as Ni+30C+20N+0.5(Mn+Cu+Co), and A is defined as −16.2+6.3Cr.sub.eq−9.3Ni.sub.eq, here, in the definition of Cr.sub.eq and Ni.sub.eq, each element symbol indicates a content of the each element in units of % by mass.

In the context of additive manufacturing processes wherein an object is built by layered accumulations of discrete instantaneous deposits of feedstock material at specific locations according to a three-dimensional digital data model, systems and methods are taught for operating multiple independently-moving depositing devices in a shared build space to build the object. In some embodiments, depositing components perform discrete material depositing actions according to sequential lists of deposit location instructions which are dynamically sortable, enabling a control methodology to alleviate collision risks among depositing components and to improve thermal conditions of a workpiece during construction. Further embodiments provide for dynamic apportionment of discrete deposition actions among the available depositing devices for load balancing and fault tolerance.

A robotic electric arc welding system includes a welding torch, a welding robot configured to manipulate the welding torch during a welding operation, a robot controller operatively connected to the welding robot to control weaving movements of the welding torch along a weld seam and at a weave frequency and weave period, and a welding power supply operatively connected to the welding torch to control a welding waveform, and operatively connected to the robot controller for communication therewith. The welding power supply is configured to sample a plurality of weld parameters during a sampling period of the welding operation and form an analysis packet, and process the analysis packet to generate a weld quality score, wherein the welding power supply obtains the weave frequency or the weave period and automatically adjusts the sampling period for forming the analysis packet based on the weave frequency or the weave period.

A robotic electric arc welding system includes a welding torch, a welding robot configured to manipulate the welding torch during a welding operation, a robot controller operatively connected to the welding robot to control weaving movements of the welding torch along a weld seam and at a weave frequency and weave period, and a welding power supply operatively connected to the welding torch to control a welding waveform, and operatively connected to the robot controller for communication therewith. The welding power supply is configured to sample a plurality of weld parameters during a sampling period of the welding operation and form an analysis packet, and process the analysis packet to generate a weld quality score, wherein the welding power supply obtains the weave frequency or the weave period and automatically adjusts the sampling period for forming the analysis packet based on the weave frequency or the weave period.

An optical manufacturing process sensing and status indication system is taught that is able to utilize optical emissions from a manufacturing process to infer the state of the process. In one case, it is able to use these optical emissions to distinguish thermal phenomena on two timescales and to perform feature extraction and classification so that nominal process conditions may be uniquely distinguished from off-nominal process conditions at a given instant in time or over a sequential series of instants in time occurring over the duration of the manufacturing process. In other case, it is able to utilize these optical emissions to derive corresponding spectra and identify features within those spectra so that nominal process conditions may be uniquely distinguished from off-nominal process conditions at a given instant in time or over a sequential series of instants in time occurring over the duration of the manufacturing process.