Teflon sacrifice plates and gauges
Publication Date: 2016-Nov-07
The IP.com Prior Art Database
The present invention refers to a device which is mounted between the previous gauges and the piece fitted and it comprises: - two sacrificial plates, each one allocated and in contact with one side of the part, with a certain thickness, and - a joining element suitable for attaching the both sacrificial plates in its sides by removable physical attaching means, such as screws or bolts.
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Teflon sacrifice plates and gauges
Since long time ago, in the aerospace industry there are some parts where further manufacturing processes become necessary. Those further steps are usually short in time and do not require so much accuracy rather than the regular ones carried out at the manufacturing line, or assembling line. Moreover, those parts are small parts, such as parts of ribs or other stiffening elements, which can be easily handled by technical operators. Due to its size, those little manufacturing processes are performed within workshops distributed among manufacturing line stages. In this particular case, the step referred is the setup of fittings on ribs, but without limitation, many other processes can be understood when little manufacturing steps are addressed.
The common practice nowadays is to place the part to assemble in the jig and assuring its correct position filling the space between the jig and the surface of the part, a couple of devices are installed in the middle with an exact width of the space previously mentioned. These devices which fill the space between elements are named gauges. For instance, this situation is shown in the Fig. 1, where part of a rib is already installed in the jig with the gauges.
Figure 1: Picture shown the step of setting up fittings on ribs using the gauges.
Since this process is carried out several times, the setup and takeout of the part may induce to scratches on its surface. Due to these scratches or any other superficial damage produced by the gauges, a further step of painting or reconditioning is needed to overcome the aeronautical requirements of the piece, that are mainly structural-related. This is translated into too much surplus time and man hours not previously accounted to.
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As it has been stated before, there are many drawbacks with the current solution to this manufacturing stage. Because the fittings are thought to be used with many different types of parts, in a range of sizes, the versatility is necessary. This is achieved by the use of exchanging gauges avoiding superficial damages in the part.
The present invention refers to a device which is mounted between the previous gauges and the piece fitted. This device is shown in Fig. 2, and it comprises:
- two sacrificial plates, each one allocated and in contact with one side of the part, with a certain thickness, and
- a joining element suitable for attaching the both sacrificial plates in its sides by removable physical attaching means, such as screws or bolts.
Figure 2: Device with two sacrificial plates (comprising a layer of deva.tex® in their inner sides) and a joining element attached.
The key feature of this invention is that the inner side of the sacrificial plates, that one in direct contact with the surface of the aeronautical part, comprises a layer of material that absorbs the relative movement and avoids scratches onto the surface of the part. This m...