Method and device for the industrial thermal treatment of elongated mechanical parts

Abstract

A device for the thermal treatment of elongated mechanical parts including an oven having a cylinder barrel arranged into a heated enclosure, the barrel having at least one ring driven in rotation around an axis of axial symmetry of the cylinder barrel by a driving mechanism. The ring including at least one storage pipe parallel to the axis of axial symmetry able to receive at least one mechanical part to be heated, and the enclosure having an inlet and an outlet for the mechanical parts which are equidistant from the axis of axial symmetry for each ring of the barrel. A method for the thermal treatment of mechanical parts is also provided.

1 . A device for the thermal treatment of elongated mechanical parts, comprising:
 an oven having a barrel arranged into a heated enclosure, the barrel including a ring driven in rotation around an axis of axial symmetry of the barrel by a driving mechanism, the ring having at least one storage pipe parallel to the axis of axial symmetry, and the enclosure having an inlet and an outlet corresponding to the ring equidistant from the axis of axial symmetry of the barrel;   a conveyor pipe for guiding the mechanical parts toward the storage pipe of the ring via the inlet and along a filling axis parallel to the axis of axial symmetry; and   an ejection pipe for guiding the mechanical parts when the mechanical parts exit the storage pipe of the barrel through the outlet after a rotation of the barrel, the inlet and outlet being arranged on an upstream side of the enclosure.   
   
   
       2 . The device of  claim 1 , wherein the oven includes a plurality of coaxial rings, and the device further comprises a plurality of conveyor pipes respectively corresponding to the coaxial rings and a plurality of ejection pipes respectively corresponding to the coaxial rings, the conveyor and ejection pipes being arranged on the upstream side of the enclosure. 
   
   
       3 . The device of  claim 1 , further comprising:
 a first air injection system positioned to push mechanical parts from the conveyor pipe toward the storage pipe.   
   
   
       4 . The device of  claim 3 , further comprising:
 a second air injection system positioned to push mechanical parts from the storage pipe toward the first ejection pipe, the second air injection system being arranged on a downstream side of the enclosure, opposite the upstream side.   
   
   
       5 . The device of  claim 1 , further comprising:
 a picking system configured to sequentially fill the storage pipe.   
   
   
       6 . The device of  claim 5 , wherein
 the picking system includes two electromagnets, arranged on the conveyor pipe, which operate alternately.   
   
   
       7 . The device of  claim 1 , further comprising:
 a sorting system configured so as not to thermally treat faulty mechanical parts.   
   
   
       8 . The device of  claim 7 , wherein the sorting system is arranged upstream from the conveyor pipe, the sorting system having a flexible pipe coaxial to a conveyor line of the mechanical parts and an attraction mechanism configured to selectively attract the flexible pipe to offset it in relation to the conveyor line. 
   
   
       9 . The device of  claim 7 , wherein the oven includes a plurality of coaxial rings and the sorting system includes a discard orifice for each ring arranged on the upstream side of the enclosure between an inlet and an outlet of each ring, the discard orifice, inlet and outlet of each ring being equidistant from the axis of axial symmetry. 
   
   
       10 . The device of  claim 9 , further comprising:
 a complementary air injection system for ejecting a faulty mechanical part through a respective discard orifice, the complementary air injection system being arranged on a downstream side of the enclosure, opposite the upstream side.   
   
   
       11 . The device of  claim 9 , further comprising:
 a controlling system for managing and controlling the device.   
   
   
       12 . The device of  claim 9 , further comprising:
 a visual detection system for visually detecting faults of a mechanical part upstream from the conveyor pipe.   
   
   
       13 . A method for the thermal treatment of mechanical parts, the method comprising:
 visually inspecting the mechanical parts to detect faulty mechanical parts;   making a plurality of mechanical parts without defect penetrate into a storage pipe of a barrel arranged in an enclosure via an inlet arranged on an upstream side of the enclosure, the storage pipe being parallel to an axis of axial symmetry of the barrel;   rotating the barrel in a first direction around its axis of axial symmetry so that the mechanical parts arranged in the storage pipe are heated; and   ejecting the mechanical parts contained in the storage pipe from the oven when the storage pipe reaches an outlet located on the upstream side of the enclosure.   
   
   
       14 . The method of  claim 13 , wherein making a plurality of mechanical parts without defect penetrate into a storage pipe includes making a plurality of mechanical parts without defect penetrate into the storage pipe according to a predetermined sequence. 
   
   
       15 . The method of  claim 14 , wherein the predetermined sequence consists in storing a plurality of mechanical parts in a conveyor pipe in front of the inlet and then filling the storage pipe by sending all the mechanical parts stored in the conveyor pipe at once. 
   
   
       16 . The method of  claim 13 , wherein the oven includes a respective discard orifice arranged on the upstream side of the enclosure between the inlet and outlet of each ring, the discard orifice, inlet and outlet of each ring being equidistant from the axis of symmetry, and wherein the method further comprises turning the barrel, when a faulty mechanical part is detected, in a first direction to align the faulty part with a first storage pipe which faces the inlet, injecting the faulty part into the first storage pipe which faces the inlet, and turning the barrel in a second direction, opposite to the first direction, until the first storage pipe containing the faulty part aligns with the discard orifice.