摘要:
A gripping apparatus includes an impermeable layer defining a vacuum port, a first flow media layer associated with the impermeable layer, and a second flow media layer opposed from the first flow media layer to define a receiving space therebetween.
摘要:
A method of monitoring a curing process for fiber reinforced composite materials that includes positioning an actuator on uncured composite material at a first location. At least one sensor is positioned at a second location that is spaced apart from the first location. The actuator excites waves in the composite part at the first location. At least one sensor is positioned at a second location that is spaced apart from the first location. The actuator excites waves in the composite part at the first location. The waves propagate through the composite part due to internal reflection. At least one wave metric is measured at the second location utilizing the sensor. At least one parameter of the curing process may be adjusted based, at least in part, on a wave metric measured by the sensor.
摘要:
A method of preparing a stringer (101) and panel (103) lay-up comprising the steps of providing a stringer preform (303), a panel preform (508), a filler (309) and a mold (307). The mold is adapted to define an inner surface of a stringer. The method further comprises the steps of arranging the stringer preform (303) to contact the mold (307), placing filler (309) material between the mold (307) surface and stringer preform (303), and bringing the reinforcement material (303) into contact with the panel preform (508). The shape of the mold (307) is configured to control filler (309) placement and/or filler shape and/or filler volume.
摘要:
A display includes a first interface section provided with a relief-type diffraction grating constituted by a plurality of grooves, and a second interface section provided with a plurality of recesses or projections arranged two-dimensionally at a center-to-center distance smaller than the minimum center-to-center distance of the plural grooves, and each having a forward tapered shape.
摘要:
Embodiments of the present disclosure are drawn to additive manufacturing apparatus and methods. An exemplary apparatus for fabricating components via additive manufacturing may include a programmable CNC machine. The CNC machine may comprise a first worktable extending in a first plane and a second worktable extending in a second plane, wherein the second plane is oriented at an angle relative to the first plane. At least one conveyor belt may be operably coupled to the first worktable. A printing gantry may be displaceable along a first axis of the CNC machine. The CNC machine may also comprise an applicator having a nozzle configured to deposit material on the second worktable.
摘要:
In an example, a method for forming a composite part includes, based on a part specification, cutting layers of material in a sequence and positioning the layers to form a stack. For each layer, after positioning the layer and before cutting a next layer in the sequence, the method includes (i) scanning along a length of the layer to determine an image, (ii) determining, based on the image, at least two edges of the layer, (iii) determining, based on the edges, a measured width at locations along the length of the layer, (iv) comparing the measured width at each location to a target width at the location, (v) deciding, based on the comparison, whether to adjust the production process, and (vi) if the decision is to adjust the production process, then adjusting the production process based on the comparison. The part specification specifies the target width at each location.
摘要:
A method of completing a fiber composite part includes the steps of providing a pre-manufactured fiber composite part, the fiber composite part including a structure of fibers embedded in a matrix of a resin, the resin being hardened; inspecting the composite part for portions of the structure of fibers that are insufficiently impregnated by the hardened resin; applying a preparation of a hardenable material to a surface portion where an identified structure portion of the structure of fibers that is insufficiently impregnated is exposed; applying mechanical vibration to the preparation applied to the surface portion to cause material of the preparation to impregnate the structure portion in a flowable state, and causing the material to solidify.
摘要:
A pressure-maintenance device for a resin injection system including an injection network connected to an injection mould, includes a pressurisation device adapted to inject a pressurised gas into a channelling; a first connector adapted to be connected to the resin injection network and adapted to be connected to the channelling; a second connector adapted to be connected to the injection mould of the injection system; the first connector being connected to the second connector by a pressure-maintenance channelling adapted to receive the gas injected under pressure.
摘要:
A fiber preform for a hollow turbine engine vane, and a method of fabricating such a hollow vane are provided. The preform includes a first fiber structure including a main longitudinal portion for forming a pressure side wall of an airfoil; a second fiber structure including a main longitudinal portion for forming a suction side wall of the airfoil; each of the first and second fiber structures includes a first interlinking zone extending along the front edge of its main longitudinal portion, which first zones are integral with each other and form a first interlinking portion, and a second interlinking zone extending along the rear edge of its main longitudinal portion, the second zones being integral with each other and forming a second interlinking portion. The main longitudinal portions of the first and second fiber structures are dissociated so as to leave a gap between the main longitudinal portions forming an airfoil hollow.
摘要:
The present invention is a method for real-time controlling a resin transfer molding process, which is used to control a filling pressure of a resin in a resin transfer molding (RTM) apparatus. In a pre-control RTM process, the current filling pressure, the current permeability and the wave front position at the current time point is input into a prediction-control model to acquire a predicted filling pressure at the next time point. The predicted filling pressure is used as the filling pressure to make the resin flow to the expected position of the wave front at the next time point, whereby to achieve stable quality of RTM products.