The invention relates to a method for determining the geometry of a raw part, which is shaped to form a finished part in a hydroerosive grinding method, comprising the following steps: (a) creation of a structural model of the finished part to be produced, the structural model of the finished part to be produced being used as an initial model for the first execution of the next step (b); (b) mathematical simulation of the hydroerosive grinding method, with which an intermediate model with a modified geometry is produced starting from an initial model; (c) comparison of the intermediate model produced in step (b) with the structural model of the finished part and determination of the distance, orthogonal to the surface of the structural model of the finished part, between the structural model of the finished part to be produced and the intermediate model at each node of the structural model, and comparison of the orthogonal distance with a predetermined limit value; (d) creation of a modified model of the component by adding from 5 to 99% of the distance determined in step (c) with the opposite sign at each node on the surface of the model which is used as an initial model in step (b), orthogonally to the surface, and repetition of steps (b) to (d), the modified model created in step (d) being used as a new initial model in step (b) if the orthogonal distance determined in step (c) at at least one node is greater than the predetermined limit value; (e) termination of the simulation when the orthogonal distance determined in step (c) between the structural model of the finished part and the intermediate model at each node falls below a predetermined limit value, the initial model of the step (b) carried out last corresponding to the raw part geometry to be determined.

Embodiments of an enclosure including a substrate having an anti-fingerprint surface are disclosed. The anti-fingerprint surface may include a textured surface, a coated surface or a coated textured surface that exhibits a low fingerprint visibility, when a fingerprint is applied to the anti-fingerprint surface. In one or more embodiments, the enclosure exhibits any one of the following attributes (1) radio, and microwave frequency transparency, as defined by a loss tangent of less than 0.03 and at a frequency range of between 15 MHz to 3.0 GHz; (2) infrared transparency; (3) a fracture toughness of greater than 0.6 MPa.Math.m.sup.1/2; (4) a 4-point bend strength of greater than 350 MPa; (5) a Vickers hardness of at least 450 kgf/mm.sup.2 and a Vickers median/radial crack initiation threshold of at least 5 kgf; (6) a Young's Modulus in the range from about 50 GPa to about 100 GPa; and (7) a thermal conductivity of less than 2.0 W/m° C.

Techniques for abrasively blasting (e.g., grit blasting) components, such as ceramic or CMC components. In some examples, based on a comparison of component geometry to a target geometry, a blasting path over the surface of the component may be generated for a selected traverse speed. A computing device may control a blasting device to blast the component according to the generated blasting path with the selected traverse speed. In some examples, based on a comparison of a component geometry to a target geometry, a respective traverse speed for a blasting device relative the component for each section of a plurality of sections over a surface of the component may be generated. A computing device controls the blasting device to blast the component according to the respective traverse speeds relative over a surface of the component to remove material from the surface of the component.

A translatable, ultra-high pressure liquid jet system includes a translatable frame configured to maintain mechanical contact with a rail. The liquid jet system includes a liquid jet processing head affixed to the frame and configured to maintain a distance from the rail and provide a liquid jet that contacts the rail. The liquid jet system also includes an ultra-high pressure liquid pump in fluid communication with the liquid jet processing head. The ultra-high pressure liquid pump is configured to supply pressurized liquid to the liquid jet processing head.

Embodiments of an enclosure including a substrate having an anti-fingerprint surface are disclosed. The anti-fingerprint surface may include a textured surface, a coated surface or a coated textured surface that exhibits a low fingerprint visibility, when a fingerprint is applied to the anti-fingerprint surface. In one or more embodiments, the enclosure exhibits any one of the following attributes (1) radio, and microwave frequency transparency, as defined by a loss tangent of less than 0.03 and at a frequency range of between 15 MHz to 3.0 GHz; (2) infrared transparency; (3) a fracture toughness of greater than 0.6 MPa.Math.m.sup.1/2; (4) a 4-point bend strength of greater than 350 MPa; (5) a Vickers hardness of at least 450 kgf/mm.sup.2 and a Vickers median/radial crack initiation threshold of at least 5 kgf; (6) a Young's Modulus in the range from about 50 GPa to about 100 GPa; and (7) a thermal conductivity of less than 2.0 W/m° C.

A device for treating 3D powder printing elements includes a first chamber with a first partial chamber and a second partial chamber separated by at least one screen grid. Grid meshes allow compressed powder residues to pass through. A rotation means rotates the first chamber about an axis of rotation, in particular with a rotary passage. The screen grid is inclined, in particular perpendicular, to the axis of rotation of the first chamber. A filling region allows filling the 3D powder printing elements into the first partial chamber. Gas medium is supplied in the first chamber, in particular in the first partial chamber. Gas medium suction means extract plastic powder residues from the first chamber, in particular from the second partial chamber. The gas medium suction means are mounted in or parallel to the axis of rotation and/or centered by the rotary means, in particular within the rotary passage.

A method for centering device on a cutting device using an ultrahigh pressure (UHP) hose carrying UHP fluid that is designed to be inserted into a pipe or tube and cut the same from the inside out. In one example, the cutting device is for insertion into a wellbore for cutting the casing of the wellbore from within the wellbore with a revolvable UHP hose. The cutting head which effectuates the cut may be centered by the centering device that is generally conical in shape such that a portion of the centering device remains exterior to the pipe or tube as the UHP revolves during the cutting action.

A method for cleaning a jet engine includes introducing a cleaning medium having solid materials into the engine by way of at least one discharging device, wherein the cleaning medium exits from the discharging device at an exit speed of 80 m/s or less.

First guide pipes are disposed on both sides of blasting areas, and second guide pipes are disposed on both sides of the blasting area. A wire rod W is inserted through the first guide pipes and the second guide pipes, penetrating in a conveying direction of the wire rod W. The diameter of each of first insertion holes of the first guide pipes and second insertion holes of the second guide pipes is gradually reduced toward the downstream side in the conveying direction. The second guide pipe is installed in a state in which the downstream-side end portion in the conveying direction is inserted into the first insertion hole from the inlet side of the first guide pipe.

First guide pipes are disposed on both sides of blasting areas, and second guide pipes are disposed on both sides of the blasting area. A wire rod W is inserted through the first guide pipes and the second guide pipes, penetrating in a conveying direction of the wire rod W. The diameter of each of first insertion holes of the first guide pipes and second insertion holes of the second guide pipes is gradually reduced toward the downstream side in the conveying direction. The second guide pipe is installed in a state in which the downstream-side end portion in the conveying direction is inserted into the first insertion hole from the inlet side of the first guide pipe.