Arrangement for riveting

Details Arrangement for riveting Arrangement for riveting

1989-04-05

1990-04-24

Bell, Paul A.

Elongated-member-driving apparatus

With means to shape work or cut product

Means to form opening in work for member

227 51, B27F 702

Patent

active

049193210

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to an arrangement for the riveting of sheet
material, such as sheeting or laminate, for example made of metal, metal alloy, plastic or wood, etc., comprising a device for drilling, a device for the positioning of rivets, a device for repetitive striking movements and a bucking bar device.
Manual riveting has been used until now for the riveting of irregular sheet materials, i.e. workpieces with curved surfaces of the kind encountered in the manufacture of aircraft and other manufacturing of objects with complex forms. This has required an operative first to drill a hole with a hand tool, then to place a rivet in the resulting hole, and then, using a device for repetitive striking movements, to work in conjunction with a second operative applying a bucking bar device to the other end of the rivet in order to secure the rivet. Such manual work leads to circulation disorders in the operatives' fingers,. known as "white fingers".
The object of the present invention is accordingly to make available an arrangement of the kind referred to by way of introduction, by means of which workpieces with complex surfaces made of sheet material can be riveted in a rapid and reliable fashion so as to achieve riveted joints of high, uniform quality. An additional aim is that the arrangement must not require any manual proficiency on the part of the operative concerned, or cause industrial injury of the kind referred to above.
In accordance with the invention an arrangement of this kind is characterized in that the devices for drilling, for the positioning of the rivets and for the repetitive striking movements are so arranged as to be capable of being adjusted one at a time into one and the same operating position in relation to a frame, which by means of previously disclosed first positioning devices is freely adjustable in space in relation to the aforementioned sheet material, on one side of it, in conjunction with which the bucking bar device is freely adjustable by means of previously disclosed second positioning devices in space in relation to the aforementioned sheet material, on the other side of it, so arranged as to interact with the device for repetitive striking movements during the riveting operation. A large number of arrangements of the aforementioned devices for drilling, for the positioning of the rivets, and for repetitive striking movements are conceivable. They may, for example, be so arranged as to be capable of linear displacement along a guide path, in conjunction with which their directions of operation will normally form a right angle with the linear guide path. However, an arrangement of this kind is relatively ungainly and heavy. In an appropriate embodiment of the invention the aforementioned devices for drilling, for the positioning of the rivets and for the repetitive striking movements are so arranged as to be capable of pivoting in a plane about a shaft which is supported by the aforementioned frame. The aforementioned devices are preferably attached to a plate which is pivotally supported in a plane, preferably a horizontal plane, about the aforementioned shaft, in conjunction with which the operating directions of the aforementioned devices converge towards the centre of the aforementioned shaft. The ability of the plate to pivot can be achieved in a variety of ways. It is accordingly possible to use a linear motor with the appropriate coupling devices, or a pulse motor, which steps the plate between the desired positions. The plate may appropriately be so arranged as to be capable of being locked in the operating position of the aforementioned devices by means of a locking device. The aforementioned devices must be capable of being displaced one at a time from their rest positions to the radial position of -he aforementioned operating position by means of driving devices. A common driving device of this kind is used for the aforementioned devices in an appropriate embodiment of the arrangement in accordance with the invention.
The bucking bar device can itself

REFERENCES:
patent: 3478567 (1969-11-01), Galutia
patent: 3534896 (1970-10-01), Speller et al.
patent: 3747193 (1973-07-01), Gregory
patent: 4515302 (1985-05-01), Davern et al.
patent: 4548345 (1985-10-01), Puritz et al.

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