DE407941C

DE407941C - Device for electrical resistance heating

Info

Publication number: DE407941C
Application number: DESCH67672D
Authority: DE
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-04-27
Filing date: 1923-04-27
Publication date: 1925-01-05

Description

Der Erfindungsgegenstand ist eine Vorrichtung zur Elektroerwärmung, welche besonders zur Erwärmung von Massenartikeln, wie Nietpinnen, Pinnen für Kopfschrauben o. dgl., aber auch als Nietwärmer verwendbar ist, wo es sich um Mengenleistungen handelt, für welche die bekannten elektrischen Nietwärmer mit zwei, drei oder mehr Nietstellen nicht ausreichen.The subject of the invention is a device for electrical heating, which is particularly for heating mass-produced items, such as rivet pins, pins for head screws o. the like., but can also be used as a rivet warmer, where it is a question of volume outputs, for which the known electric rivet warmers with two, three or more riveting points do not sufficient.

Bekanntlich wird mit den bekannten Nietwärmerbauarten oder den in Anlehnung an diese entwickelten Pinnenwärmern ein der Mengenleistung nach befriedigendes Arbeiten nicht erzielt, sobald diese Vorrichtungen als Pinnenwärmer mit der Nietpresse zusammenarbeiten sollen. Erhöht man die Zahl der Wärmestellen, so wird, da jede Wärmestelle besonders bedient wird, die Bedienung zu schwer und die Bauform zu großräumig.As is known, with the well-known rivet heater types or based on these developed tiller warmers a job that was satisfactory in terms of volume not achieved as soon as these devices work as tiller warmers with the rivet press should. If the number of hot spots is increased, since each hot spot is specially served, the operation is increased heavy and the design too spacious.

Die vorliegende neue Bauart läßt sich bei kleinstem Raumverbrauch und, ohne die Bedienungsansprüche zu erhöhen, für jede praktisch in Frage kommende Leistung bauen. Sie wird auch durch ihren spezifisch kleinen Stoffaufwand und ihren einfachen Aufbau billig im Bau und betriebssicher.The present new design can be used with the smallest space and without the operating requirements to increase, build for every practically possible achievement. It is also characterized by its specifically small size Cost of materials and their simple structure cheap to build and reliable.

Abb. ι tujd 2 stellen den Erfindungsgegenstand schematisch dar. AbI). 1 ist ein Längsschnitt, Abb. 2 ein Querschnitt. Der ringförmige Eisenkern Ä" wird von der Unterlage U getragen; P ist die Primärwicklung. Den Sekundärkreis bildet:Fig. Ι tujd 2 represent the subject matter of the invention schematically. AbI). Fig. 1 is a longitudinal section, Fig. 2 is a cross section. The ring-shaped iron core Ä "is carried by the base U ; P is the primary winding. The secondary circuit forms:

1. das Rohr R, 1. the tube R,

2. die beiden aus Blechen aufgebauten Kreisscheiben SS, 2. the two circular disks SS constructed from sheet metal,

3. die Kotitaktgeber EE mit den auswechselbaren Haltern HH, 3. the Kotitaktgeber EE with the exchangeable holders HH,

4. die Werkstücke, hier zwei Pinnen BB, deren Erwärmung also von der Stoßstelle ausgeht. 4. the workpieces, here two pins BB, which are heated from the joint.

Der ganze Sekundärkreis ist auf einer Welle m befestigt, die drehbar im Maschinengestell gelagert ist. Die beiden kreisförmigen Scheiben 6".S haben radiale Schlitze nn, deren radiale Tiefe so bemessen wird, daß die stehenbleibenden Segmente, welche die Kontaktgeber tragen, diesen durch ihre Elastizität die Backenschlußbewegung und die achsiale Stauchbewegung ermöglichen. Die Zahl der Segmente und Kontaktgeber wird durch die verlangte Mengenleistung bestimmt.The entire secondary circuit is attached to a shaft m , which is rotatably mounted in the machine frame. The two circular disks 6 ".S have radial slots nn, the radial depth of which is dimensioned so that the remaining segments that carry the contactors allow them the jaw closing movement and the axial compression movement due to their elasticity. The number of segments and contactors is determined by determines the required output.

Die Arbeitsweise ist folgende '■ Aus dem oberen Alagazin (Abb. 5) rollen die Pinnen in die sich hier öffnenden Backen. Unmittelbar danach schließen sich die Backen; darauf folgt eine kurze Achsialbewegung der sich gegenüberstehenden Backenpaare, wodurch die Stoßflächen der beiden Pinnen unter Druck in Kontakt kommen. Damit ist für diese der Stromkreisgeschlossen. Die Drehgeschwindigkeit und die Stromzufuhr im Primärkreis werden so eingestellt, daß bei Erreichung der unteren Ablaufrinne, vor welcher sich die Backen in der Stromschlußbewegung entgegengesetzter Achsialbewegung öffnen, die richtige Wärme erreicht ist. Aus der Ablaufrinne fallen die Pinnen entweder auf eine Platte, von welcher sie von Hand der Presse zugeführt werden, oder die Rinne führt sie gleich zu den Schlagwerkzeugen einer wagerecht mit zwei gegen-The operation is the following '■ From the upper Alagazin (Fig. 5), the spinning roll into the opening here baking. Immediately afterwards the cheeks close; This is followed by a short axial movement of the opposing pairs of jaws, whereby the abutting surfaces of the two tiller come into contact under pressure. This closes the circuit for them. The speed of rotation and the power supply in the primary circuit are set in such a way that the correct heat is achieved when the lower drainage channel is reached, in front of which the jaws open in the current-closing movement of the opposite axial movement. From the drainage channel, the pins either fall onto a plate, from which they are fed to the press by hand, or the channel leads them straight to the striking tools, one horizontally with two opposite

Claims

continuously working stamps working press, which strikes two pins at the same time. In this case, the press expediently controls the rotation, which then takes place in time with the impact by a locking drive coupled to the press and acting on a ratchet wheel seated on the shaft m. If, however, the press is loaded by hand, the rotation takes place uniformly through the worm gear drive d, τν.

Fig. 3 shows a developed piece of the jaw control. 'The Zylinderresi as designed trajectory LL acts on the role I, which is coupled to the contact carrier E ^1, and on to the contact carrier E, coupled Role II. The trajectory is below the supporting web of the supporting body ^by! Angle or by means of interfitted pieces. When moving in the direction of the arrow: the position shown is | just the role I on the sloping part of the ^; Guide curve. As a result of the suspension of the segment, E ¹ now makes a partial rotation around point 0. This closes the pair of jaws. A little later, roll II comes to the falling part of the curve. This gives the pair of jaws an axial movement against the pair of jaws on the opposite side. The two detected pins collide with their end faces under the resilient pressure of the inwardly resilient segments and thus close the circuit.

The role II is now higher than I in the radial direction. The inwardly protruding part of the role II runs onto the recessed part A of the guide curve a little before reaching the discharge channel. The two pairs of jaws working against each other move away from each other somewhat in the axial direction. Shortly afterwards, roll I also runs onto the rising part of the guide curve and opens the jaws.

Of course, even special guides of the jaws may be arranged instead of the simple ₁ suspension of the segments that is, the pivot point 0 may be in the axially both jaws leading carriage in a fixed axis. Special additional springs can then also increase the clamping pressure and the axial contact pressure.

When two pins collide, the unavoidable when heated individually Heat is dissipated by the electrodes in contact with the hot spot, the beneficial effect improved. But should, what is required in special cases, the end of the to be heated Zone of the tiller stay colder, both ends of the tiller hit against those running in the middle, Intermediate electrodes recooled again and again through immersion cooling.

As can be seen in Fig. 1, the carrier U is axially constricted in such a way that the empty jaws, leaving it between them, rotate past. When passing through the lower zone, the jaws expediently run through a water corner g and are cooled here.

If the device works as a rivet warmer, as Fig. 4 shows, only simple, axial ones are used Contactors moving against each other are necessary. The rotation of the secondary is then expediently carried out intermittently by a vo * i hand or foot lever operated ratchet lever.

Ρλτε ν t-An Proverbs:

i. Device for electrical resistance heating, characterized in that the core enclosing an annular core carrying the fixed primary winding, Secondary rotatable about the ring axis in its of two opposite one another Circular disks existing part by radial incisions in the contactor supporting elastic segments is subdivided, which when rotating the secondary turn past guide curves in such a way that that the closing and opening movements of the contactors are controlled by the guide curves. . .

2. Apparatus according to claim 1, characterized in that the contactor when the bottom position is reached while rotating about a horizontal axis Immerse in a cooling basin filled with coolant (water).

3. Apparatus according to claim 1, characterized in that the feed

'The contact takes place through a feed channel while the heated Pieces in time with the processing press takes place on their tools, with the rotation of the secondary is controlled by the press.

.

4. Method of heating rivet pins and the like, which can only be heated at one end Bolt, characterized in that the final heating occurs with collision the ends of two bolts takes place. no

1 sheet of drawings.