SU865978A1 - Device for chemical thermal treatment of parts - Google Patents

Description

one

. This invention relates to mechanical engineering, in particular to cleaning, degreasing, pickling, phosphating, and the like. metal products by chemical methods.

The closest to the proposed technical essence and the achieved result is a device for continuous thermochemical processing of metal parts in a liquid, containing a hopper feeder, a set of conical drums with perforated walls attached to screws with a horizontal axis, continuously rotating around a common horizontal axis and Partially immersed in a treatment bath filled with a constantly renewed fluid. Parts in this device come from the bunker feeder in a continuous flow, pass through conical drums, where they are treated with the necessary solution, and enter the collection of parts | .1.

The disadvantages of the known device are, firstly, that the drums are constantly in an aggressive environment, which leads to their rapid deterioration, secondly, to make perforations along the entire lateral surface of the drums is laborious, and reduce the resistance of the drums ..

The purpose of the invention is to simplify the construction and increase the service life.

The goal is achieved by the fact that in the device for thermochemical machining of parts, with;} a holding feeder, a number of baths and perforated rabbits: with the transmitting shnexm fixed on their inner wall, mounted rotatably, the drums are provided with a shut-off pipe and are located above the baths, and the perforations are made on the final portion of the length of the drums.

Claims (1)

The drawing shows a device for thermochemical processing of parts. The device comprises a feeder 1, drums 2 with transfer screws on the inner wall 3, with intake pipes 4 for gripping and with perforations 5 for draining the process solution. The drums 2 are connected to a drive (not shown) mounted above the mirror of the process solution and the bath 6. At the outlet of the last drum, a tray 7 is installed to transfer the processed parts. The device works as follows. The machined parts from the feeder 1 enter the first drum 2, during rotation of which a portion of the corresponding solution is captured by the nozzle 4 from the bath 6 and is fed into the barban, where the transmitting screw 3 together with the parts to be processed is transferred from the beginning to the end of the drum and through the perforations it pours out again in the bath. The parts are transferred by a screw to a subsequent drum, the nozzle 4 of which captures a portion of the corresponding solution from the next bath, pours it into the drum inside the parts and transfers it with the screw along with the parts to the perforations at the end of the drum, where it is again poured into the bath. At this time, a new portion of parts and the corresponding technological solution are delivered to the first drum. Thereafter, the cycles are continuously repeated. The production of cylindrical drums with perforations only on the final section, compared with the known device, is less laborious and more technological. The durability of the drums is superior, since they are not weakened across the entire side surface by the holes. The ability to install drums above the solution, due to the intake of the required amount of solution by the intake nozzles, allows them to significantly lengthen, their service life compared to the drum is constantly being in aggressive liquid, since the contact with aggressive liquid has only the internal surface of the drum. In addition, the machined parts in the proposed device are transmitted by a screw from one drum to another without differences in height, without impacts, which is especially important for products that are not subject to mechanical action by technology to avoid damage to their surface. Claims An apparatus for thermochemical machining of parts, comprising a feeder, a series of baths, perforated drums with a transmission screw fixed on their inner wall, mounted rotatably, characterized in that, in order to simplify the design and increase the service life, the drums are provided with a suction nozzle and are located above baths, and perforations are made in the final section of the length of the drums. Sources of information taken into account in the examination 1. French Application No. 2265644, cl. C 23 6 5/04, 1975.