The object of this invention is a device created to control the simultaneous or sequential feeding of metal bars in a guide equipment in order to feed an automatic multiple-spindle lathe.

The device consists basically of a series of drive shafts (21), each of which accounts for the feeding of a bar. These shafts amount to the same number as the lathe spindles and are placed in a drum (7) that rotates synchronously with the lathe spindle holding drum. Each of these shafts (21) can be coupled with contrivances (1) that can make it turn, when a certain length of bar is to be fed. This coupling can take place thanks to engaging and disengaging parts (49) mounted between every shaft (21) and its rotation control contrivances (1). Each shaft (21) controls at least one gear (36) accounting for the feeding of a bar, through a chain orthe like provided with a bar-pusher, when the shaft is made to turn. This gear (36) can be moved so as to make it possible to adjust and to use the device, whatever the spindle centre distance regarding the multiple-spindle lathe concerned may be.

Beschrieben ist eine Stangenzuführvorrichtung mit einem Öl enthaltenden, in einem Träger gelagerten Führungsrohr und einer in dem Führungsrohr axial beweglichen, mit einem Vorschubantrieb gekoppelten Vorschubstange, deren vorderes Ende ein drehbares Kupplungselement trägt, sowie mit einer Ölzuflußleitung und einer Ölrückflußleitung. Um eine solche Vorrichtung mit geringem Platzbedarf und wesentlich vereinfachter Beschickung des Führungsrohres mit jeweils einer neuen Materialstange zu schaffen, bei der die Bevorratung der Materialstangen nicht auf eine vorgegebene Anzahl vorhandener Führungsrohre begrenzt ist, ist vorgesehen, daß das Führungsrohr aus einem in dem Träger (25) ausgebildeten, mit wenigstens einer Ölzuflußleitung (12) gekoppelten Führungsrinne (4) und einem nach oben abschwenkbaren, sich über die Länge der Führungsrinne erstreckenden Deckel (21) besteht, wobei während des Vorschubs der Materialstange (6) im geschlossenen Führungsrohr der Führungsrinne (4) durch die Ölzuflußleitung (12) Öl zugeführt ist.

A centering device (1) for the guided transfer of bars from a feeder (F) to a lathe (3), and interposed therebetween aligned with a bar guide (4) with the mandrel of the lathe (3), comprising: a bush (5) for fixing to a fixing seat (6) and rigidly coupled to a bar opening (2) aligned with the respective bar guide (4) and with the mandrel of the lathe (3); a tubular body (7), rigidly coupled to the bush (5) coaxial thereto and provided with a housing seat (8) for a ring (9) with oscillating elements which are pivoted to a respective fixed anchoring element (11) with one end and are retained in mutual contact by elastic elements (12), delimiting a through opening whose diameter is about as long as the diameter of a bar. The ring (9) and the anchoring element (11) are axially movable within the seat (8), in contrast to springs (13) toward the lathe (3).

A bar loader for feeding a bar (B) to a bar machining apparatus comprises a feeding rod (22) for moving the bar and a guide rail for guiding the bar. The guide rail includes a guide rail body (10) with an upper opening for receiving the bar and a lid member (12) for covering the upper opening of the guide rail body and is operable to be opened and closed. A bar passageway formed between the guide rail body and the lid member has an inner wall surface. A plurality of oil grooves (50) are formed on the inner wall surface which extend in a circumferential direction and arranged at a distance (W) from each other in a longitudinal direction of the guide rail. It also has oil supplying system for supplying oil into the bar passageway.

A device for controlling in sequence or at the same time the feed of metal bars into a suitable guide equipment for supplying the bars to an automatic multi-spindle lathe is described.

In order to connect the main control or drive means to the means causing the feeding of the bars, said device includes clutch means, the coupling and decoupling of the clutch means being caused by the rotation of said guide equipment. The portion of the clutch means which is connected to the drive means can rock around the axis of its support on the fixed frame during the coupling operation, and return spring means are provided to return said portion back in the starting position ready for the next coupling operation.