DE1247363B - Rotary furnace for hardening small steel parts - Google Patents

Description

FEDERAL BEPUBLIC OF GERMANY

German

Patent office

EDITORIAL

Inta .:

C 21d

German class: UTc- 9/00

Number: 1247363

File number: Sch 30463 VI a / 18 c Note: October 24, 1961 Aurfegetag: 17th Eye «1967

The subject of patent 1 076160 is a rotary kiln for hardening steel pins, consisting of a furnace hood provided with a heating device and a retort circulating therein, which in protrudes freely into the oven space over its entire length from Qtm staple movable dl. The retort preferably has a drum-like configuration and takes aas GlQhgut on as an arranged mass, which is why they are inside with spiral guide surfaces for the transport of the goods is equipped. According to one embodiment of the The retort sits cn the oven door and is main patcnts near this and movable with the drive device.

The rotary furnace according to the main patent solves the task of being able to replace the retort of a rotary furnace without taking the furnace out of operation. As a result of Retortcaausbikhuie can be the rotary kiln after However, only use the main patent * for small steel parts that cannot be damaged by constant circulation and moistening during annealing, e.g. for balls or bolts. However, there are also StahlklcJntcflc, which with the greatest care when glowing be treated m & ssea, mn their surface and to protect their edges from injuries. In addition, rollers and rings for clearing bearings were born in particular.

The object of the invention is zugrandc, the To train the subject of the main patent writer and to create a rotary kiln, which can be used to protect * suitable for the annealing of steel cylinders.

An annealing furnace is already known, the furnace chamber of which consists of several tubular heating chambers arranged around a central axis and is rotatable around this central axis. The Hetekammera are located inside a tin drum, and the space between the pipes and the drum is filled with heat-insulating material. Around the drum circumference, running rings extend in rollers run off an underframe, namely four running rings are approximately evenly spaced over the Length of the drum arranged distributed. On this weave the drum is evenly supported everywhere in the one enclosed by the heating comb Only insulating material is provided in the middle part of the drum.

Another known rotary kiln has au! one mounted at both ends Axis of rotation two circular disks, which are arranged at a distance from one another and connected to one another by support rods. The support bars sit on Scope of the circling and serve to

Press furnace for the HKrMi of steel plates Addition ram patent; 1076160

Applicant:

Ferdinand Schwatz, Düsseldorf-North, Eulerstr. 48

Named as inventor: Ferdinand Schwarz, Düsseldorf-North

hung from wire ties which are annealed should. The axis of rotation with the circular disks and The furnace housing surrounding the wire bundle is open at the bottom, and the bundles are fed in from there

»5 sods removed again, with a simultaneous Diving and shepherding is done in a bath located below the furnace.

A drum furnace is also known, bd the one in the drum a plurality of electrically heatable

to muffles is arranged on a cylinder jacket. The arrangement and the circuit are such that all muffles one after the other, starting from a loading point and ending at a discharge point, the various work divisions under

3 $ scfaluss to the necessary for them by buten.

The task solution according to the requirements happens now through a rotary kiln, consisting of one provided with a heating device! " Ofengehlwse and

A retort circulating in it, which runs all the way through protrudes freely into the furnace space and can be moved out of bun, the retort being designed in a ring shape and how a wheel tire is arranged around an axis of rotation known per se. This is about the solution of the task also achieves the advantage, that the retort can be kept as light as possible, which for the load on the component on which it is attached cantilevered, an essential meaning asked. To connect the retort to the throttle

5 «axis, for example, only a number of Spokes whose cross-section must make up a fraction of the Retotteoqucruchnitta

Claims (1)

3 4 According to one embodiment of the invention, the 15 sits on the fly via corresponding gear wheels in rotation of the retort rotor at one end which can be moved outside. The front part 14 of the α Drehdes furnace chamber mounted rotary axis, which extends beyond the axis 14 in the rotor is loosely guided by an asbestos packing 16, projecting in the retracted condition inside the furnace 3 into it and carries there by means of the hub of the retort. As a result, the 5 17 wheel spokes 18 on which the ring retort 19 is prevented from having the effects of vibrations, which is ordered in FIG. The axis part 14 α continues as part of the furnace hall in question through other machines 14 b beyond the hub 17 and penetrates are possible. the rear wall of the furnace 1, which at this point with the retort ring can be provided with a multitude of tubular insulating packs 20, and rests loosely on two rollers 21 with a shaped, axially located surface of the tip 14 c on two rollers 21, which are shown in FIG contain receiving spaces for the annealing material, as it is guided on a roller block 22 (Fig. 4).
is known. In this way, the chassis 10 together with the axle 14 can roll slowly without glowing parts when rotating the retort on its upper surface. A longitudinal movement or rotor 18, 19 moved away to the left (A b b. 1 and 2) rapid rolling of the glow parts is excluded, 15, whereby the retort 19 allows the furnace chamber 3 to bump with the edges against other glow parts. parts or to the walls of the retort. The ring-shaped retort 19 consists of two over-For the automatic feeding of the annealing material into the arranged rows of axially parallel compartments of the retort can in the present case tubular compartments 23 Row one after the other, e.g. turn. For this reason, ten steel rollers of 40 mm diameter and 50 mm insertion device are provided according to the invention, which each length. The whole retort includes e.g. B. 60 tubes 23 small steel parts removed from a magazine, each of about 50 cm in length. One revolution of the rotor feeds the retort and at the same time the annealed parts happen z. B. in 180 minutes. So can be transported in one from the retort into a suitable hardening bath. 25 hours, 100 kg glow parts are put through.
In detail, the rotor for automatically supplying and discharging the jerungsvorrichtung to the circumference automatic loading and emptying annealing charge are be disposed in the oven door 9 and in the rear devices at a location where the emptying of the furnace _wan d openings 24 is mounted, , seen in the direction of rotation of the retort because with a group of tubes 23 of the retort 19 wheel, 30 is aligned in front of the loading device. , Preferably sawn in it before the oven door 9 and solidifies essentially of pneumatically operated, located a magazine 25 for cold material to be annealed, wel-push rods is, the spaces by the recording hes _c to the outputs of its pockets in channels for the material to be annealed aligned openings in the 26 open out, which pass with the charging openings 24 in the furnace door and the annealing material are connected through the furnace door 9. Pneumatic submersible openings in the furnace wall on the 35 piston cylinder with coupled push rods 27 are ejected from the other side of the furnace, while those arranged in front of the chutes and functionally with a loading device essentially a magazine electrically interlocked the rotor drive, including tin, front bearing and push rods, wel- _S o that the loading takes place automatically. Likewise, before the latter act in a corresponding manner, it is with the emptying, which by push rods predominantly like the push rods of the emptying device. _{40 is} taken, which is in front of the loading rack. According to one embodiment, the loading genes are arranged, viewed in the direction of rotation of the rotor, and emptying devices are fixed to the furnace door _sm d. With each stop of the intermittently rotating and thus attached to the chassis. In the drawing, an exemplary embodiment of the series of parts from the tubes 23 is reproduced via the reverse invention, which is described below on the side of the furnace, where it is written about a not shown. It shows slide being headed into a bath. The now empty A b b. 1 a tube group 23 again in vertical longitudinal section then moves up to the side view of the rotary retort oven, which is given to the loading, ram 27, which has a number of He-Fig. 2 shows a view of the glow parts shown in cross section from the magazine 25 into the supplied furnace from above, 50 pushing the tubes 23 belonging to it. This happens in the same way-A b b. 3 a front view of the wheel-like rotation at the same time as the emptying process in the tube group lying in front of it. For example, A b b. 4 the support of the free end of the wise 20 loading and unloading processes instead. Retort wheel axle on two rollers outside the furnace housing. The system can also be operated with inert gas. 55 to be. The actual furnace housing 1 rests on the supports 2 and is made of refractory material. Patent claims:
The outside of the housing 1 is not shown Sheets clad. The furnace chamber 3 has a cylindrical 1. Rotary furnace for hardening small steel parts, drical shape and is on its surface with 60 consisting of a with a heater electrical heating resistors 4, 5, 6 provided. Tempered furnace housing and an ambient temperature sensor inside 7 monitor the temperature in the furnace end retort, which is freely in the entire length inside. The furnace space protrudes and can be moved out of it. According to patent 1,076,160, there is a device on one end of the furnace large opening 8, which through the oven door 9 shows that the retort (18, 19, 23) can be closed by a ring is. This stands on a chassis 10 and is shaped like a wheel tire around a with wheels 11, which also has bearings 12 and a known axis of rotation (14) around 13 for an axis of rotation 14 which is net from a motor. 2. Rotary kiln according to claim 1, characterized in that that the retort rotor is overhung at one end of the outside of the furnace chamber (3) The axis of rotation (14) is seated, which protrudes beyond the rotor when the retort is retracted is loosely guided. 3. Rotary furnace according to Claim I _1, characterized in that the retort ring (19) contains a plurality of tubular receiving spaces (23) for the material to be annealed, lying in the axial direction. 4. Rotary furnace according to claim 1 and 3, characterized in that at one point on the rotor circumference automatic loading and unloading devices are arranged, the The emptying device, seen in the direction of rotation of the retort wheel (18, 19), is located in front of the loading device and is essentially off pneumatically operated push rods, which through with the receiving spaces (23) for the Annealed material aligned openings (24) in the furnace door (9) drive through it and open the annealing material through corresponding openings in the furnace wall the other side of the furnace while the loading device is essentially one Magazine (25), front storage channels (26) and push rods (27), the latter in act in a corresponding way like the push rods of the emptying device. 5. Rotary kiln according to claim 4, characterized in that the loading and emptying devices are firmly attached to the oven door (9) and thus to the chassis (10). 20 Publications considered:
German Patent No. 1,076,160;
Swiss Patent No. 139 314;
U.S. Patent No. 1,630,784;
"Excerpts from German patent applications", vol. 19, p. 200 (report on O 26499 VI a / 18 c). 1 sheet of drawings 709 637/470 8.67 © Bundesdruckerei Berlin