Abstract: A spacer element serving to obtain a spacer washer positioned between first and second parts of an assembly. The spacer element includes a body having the same geometry as the spacer washer that is to be obtained and a circular score line whose diameter is equal to the internal diameter of the spacer washer that is to be obtained, this score line being configured to break upon insertion of a shank of a connection element, and a centering pad configured to center the score line with respect to the through-orifices of the first and second parts that are configured to accommodate the shank of a connection element when the centering pad is inserted into one of the through-orifices.

Abstract: A device for monitoring clamping of an assembly including at least one part to be clamped, an internally threaded element and an externally threaded element engaged in an internal thread of the internally threaded element. The device includes a driver to rotate one of the elements including the internally threaded element and the externally threaded element to clamp the assembly and a first sensor to measure a screwing torque of the driver, a tool for holding fixed against rotation the other of the elements including the internally threaded element and the externally threaded element, a second sensor to measure a reaction torque of the holding tool, a mechanism for determining a third parameter chosen from a time elapsed from a given time and a screwing angle from a reference position, and a calculation system to determine pre-tension in the externally threaded element.

Abstract: A method of monitoring the clamping of an assembly by a threaded fastener. One element of the threaded fastener is rotated by a driver while the other is held stationary by a holding tool. The screwing torque and reaction torque of the holding tool are measured. Analyzing their evolution as a function of a third parameter makes it possible to determine accurately the pre-tension in the assembly. The disclosure herein further relates to a clamping method employing a real-time monitoring method of this kind. The disclosure herein also relates to a corresponding device for implementing a method of this kind.

Abstract: A device for monitoring clamping of an assembly including at least one part to be clamped, an internally threaded element and an externally threaded element engaged in an internal thread of the internally threaded element. The device includes a driver to rotate one of the elements including the internally threaded element and the externally threaded element to clamp the assembly and a first sensor to measure a screwing torque of the driver, a tool for holding fixed against rotation the other of the elements including the internally threaded element and the externally threaded element, a second sensor to measure a reaction torque of the holding tool, a mechanism for determining a third parameter chosen from a time elapsed from a given time and a screwing angle from a reference position, and a calculation system to determine pre-tension in the externally threaded element.

Abstract: A method of reinforcing a composite material part comprising a stack of fiber layers and at least one hole with an axis. The hole crosses the layers and opens out at the level of a first face and a second face of the part. The method comprises at least one stage in the making of at least one notch in at least one layer of the part proximate to the hole or which opens out in the hole.

Abstract: A method of monitoring the clamping of an assembly by a threaded fastener. One element of the threaded fastener is rotated by a driver while the other is held stationary by a holding tool. The screwing torque and reaction torque of the holding tool are measured. Analyzing their evolution as a function of a third parameter makes it possible to determine accurately the pre-tension in the assembly. The disclosure herein further relates to a clamping method employing a real-time monitoring method of this kind. The disclosure herein also relates to a corresponding device for implementing a method of this kind.

Abstract: A method of reinforcing a composite material part comprising a stack of fiber layers and at least one hole with an axis. The hole crosses the layers and opens out at the level of a first face and a second face of the part. The method comprises at least one stage in the making of at least one notch in at least one layer of the part proximate to the hole or which opens out in the hole.

Abstract: A blind attachment that includes a body (36) with—at a first end—a visible surface (38), through which a bore (40) passes that accommodates a rod (42) of which a first end (44) projects relative to the visible surface (38) and of which the other end includes a head (46) that can deform a deformation zone (48) when the rod (42) moves translationally, with the visible surface including holding elements for coupling the body (36) to a tool that is used for driving the rod (42) in rotation, whereby the holding elements include at least one lug (52) that is connected at the visible surface (38) and that projects relative to the latter, characterized in that the at least one lug (52) is connected to the body (36) by a junction zone (54) that can break when the lug undergoes a force that exceeds a given threshold.

Abstract: An assembly comprising at least two non-metal components which are fixed to each other using at least one fixing system. The fixing system includes a fixing device with a fixing element which is provided with a head and a rod, and a crimping ring which is in contact with one of the components. A protection device is a part of the fixing system which delimits a cavity for confining gas around a portion of the device comprising the crimping ring. In order to improve the repeatability of the operation for positioning the protection device, a guiding device is provided which includes an assembly element on the portion of the fixing device, and an element for guiding the protection device.

Abstract: An assembly comprising at least two non-metal components which are fixed to each other using at least one fixing system. The fixing system includes a fixing device with a fixing element which is provided with a head and a rod, and a crimping ring which is in contact with one of the components. A protection device is a part of the fixing system which delimits a cavity for confining gas around a portion of the device comprising the crimping ring. In order to improve the repeatability of the operation for positioning the protection device, a guiding device is provided which includes an assembly element on the portion of the fixing device, and an element for guiding the protection device.

Abstract: A blind attachment that includes a body (36) with—at a first end—a visible surface (38), through which a bore (40) passes that accommodates a rod (42) of which a first end (44) projects relative to the visible surface (38) and of which the other end includes a head (46) that can deform a deformation zone (48) when the rod (42) moves translationally, with the visible surface including holding elements for coupling the body (36) to a tool that is used for driving the rod (42) in rotation, whereby the holding elements include at least one lug (52) that is connected at the visible surface (38) and that projects relative to the latter, characterized in that the at least one lug (52) is connected to the body (36) by a junction zone (54) that can break when the lug undergoes a force that exceeds a given threshold.