DE202018006535U1 - Vacuum welding furnace - Google Patents

Abstract

Vacuum welding furnace, comprising a welding chamber (18), a furnace cover (4) and a transport unit (2), the furnace cover (4) sealingly covering the top of the welding chamber (18) so that between the welding chamber (18) and the furnace cover (4 ) a welding space is formed, and a welding table (20) is provided on the lower part of the welding chamber (18), characterized in that a side of the welding table (20) facing the loading end is a heating zone and a side of the welding table (20) facing the ejection end ( 20) is a cooling zone, a suction module (9) being provided on the upper side of an end of the heating zone facing the cooling zone, which can be raised and lowered on the furnace cover (4), the bottom part of the suction module (9) together with the heating zone encloses a tightly sealed vacuum space, and wherein a protective gas inlet pipe is provided on the welding chamber (18) or the furnace cover (4).

Description

Technical area

The present invention relates to a vacuum welding furnace belonging to the technical field of vacuum welding.

State of the art

When manufacturing electronic elements and components such as diodes, triodes, thyristors or bridges, a chip has to be welded between an upper and a lower sheet of fabric. This process is known as lamination. The specific working process of lamination is as follows: first, the solder paste must be applied to the top of the lower sheet of fabric and the chip placed at a certain position of the lower sheet of fabric, then the upper sheet of fabric, the underside of which is coated with the solder paste, is put on stacked the top of the lower sheet of fabric. The upper cover of a welding mold is then placed on the base plate of the welding mold in a sealing manner, and finally the welding mold is fed into the welding furnace for welding. The welding of the sheets of fabric must be done in a vacuum furnace.

• (1) An dem Maschinentisch des Vakuumschweißofens ist ausschließlich eine mit der Vakuumverarbeitungsvorrichtung zusammenspielende Heizzone vorgesehen. Da die Lötpaste erst dann sich schmelzen lassen und den Schweißeffekt erreichen kann, wenn die Stoffblätter auf eine bestimmte Temperatur erwärmt werden sollen, jedoch benötigt der Transport der Stoffblätter in die Heizzone noch die Zeit, wodurch die Erwärmungszeit verlängert wird. Und da die Heizzone auf der oberen Abdeckung angeordnet ist, verwendet die Heizzone zur Erwärmung der Stoffblätter die Strahlung und deshalb ist ihre Wärmeübertragungseffizienz geringer, wodurch die Erwärmungszeit der Stoffblätter weiter erhöht wird und somit eine geringere Schweißeffizienz gezeigt wird;
• (2) Um den Transport der Stoffblätter durch Übertragungseinheit zu erleichtern, müssen beide Enden der Stoffblätter aus dem Stützungstisch herausragen, damit die Stoffblätter durch ihre beidseitigen herausragenden Abschnitte von der Übertragungseinheit gestützt und transportiert werden. Da die erhitzten Stoffblätter weicher sind, sind die beidseitigen herausragenden Abschnitte der Stoffblätter nach unten gebogen, so dass die Positionen der Chips an beiden Enden der Stoffblätter nicht hin zu den Kontakten der Stoffblätter ausgerichtet werden können, was zu einer großen Anzahl fehlerhafter Produkte führt;
• (3) Nach dem Schweißen weisen die Stoffblätter eine überhöhe Temperatur und somit eine relativ langsame Abkühlgeschwindigkeit auf, daher neigen die Stoffblätter nach dem Entfernen aus der Vakuumverarbeitungsvorrichtung zu oxidieren. Da die Temperatur der aus dem Maschinentisch entfernten Stoffblätter immer noch zu hoch, kann der Arbeiter die Stoffblätter nicht direkt behandeln.

The Chinese utility model with the application number 201420820418.2 discloses a continuous vacuum welding furnace with the following technical problems:

• (1) Only one heating zone that interacts with the vacuum processing device is provided on the machine table of the vacuum welding furnace. Since the solder paste can only melt and achieve the welding effect when the fabric sheets are to be heated to a certain temperature, however, the transport of the fabric sheets into the heating zone still takes time, which increases the heating time. And since the heating zone is disposed on the top cover, the heating zone uses the radiation to heat the fabric sheets and therefore its heat transfer efficiency is lower, thereby further increasing the heating time of the fabric sheets and thus exhibiting lower welding efficiency;
• (2) In order to facilitate the transport of the cloth sheets through the transfer unit, both ends of the cloth sheets must protrude from the support table so that the cloth sheets are supported and transported by the transfer unit through their protruding portions on both sides. Since the heated fabric sheets are softer, the protruding portions of the fabric sheets on both sides are bent downward so that the positions of the chips at both ends of the fabric sheets cannot be aligned with the contacts of the fabric sheets, resulting in a large number of defective products;
• (3) After welding, the fabric sheets have an excessive temperature and thus a relatively slow cooling rate, so the fabric sheets tend to be oxidized after being removed from the vacuum processing apparatus. Since the temperature of the sheets of cloth removed from the machine table is still too high, the worker cannot handle the sheets of cloth directly.

Disclosure of the invention

Technical problem

The technical problem to be solved in the present application is to overcome the deficiencies in the prior art and to provide a vacuum welding furnace and welding method to achieve both heating of the fabric sheets during transport and a high welding speed while avoiding oxidation of the fabric sheets.

Technical solution

In order to solve these technical problems, the following technical solution is used in the present application: vacuum welding furnace, comprising a welding chamber, a furnace cover and a transport unit, the furnace cover sealingly covering the top of the welding chamber, thus a welding space between the welding chamber and the furnace cover is formed, and a welding table is provided on the lower part of the welding chamber, characterized in that a side of the welding table facing the loading end is a heating zone, that a side of the welding table facing the ejection end is a cooling zone, and on the upper side one facing the cooling zone At the end of the heating zone a suction module is provided which can be raised and lowered on the furnace cover, the bottom part of the suction module together with the heating zone enclosing a tightly sealed vacuum space, and a protective gas inlet pipe on the welding chamber or the furnace coverage is provided.

It is preferably provided that the welding table comprises a plurality of heating plates and a plurality of cooling plates, the plurality of heating plates being assembled in a heating zone and the plurality of cooling plates being assembled in a cooling zone.

It is preferably provided that each of the heating plates is symmetrically provided on both sides with an electric heating tube and a sensor receiving hole is provided on the central part of the heating plate, which is designed as a blind hole provided between the two electric heating tubes, with a temperature sensor being installed in the sensor receiving hole.

It is preferably provided that each of the cooling plates is provided symmetrically on both sides with an inflow channel and an outflow channel connected to the two water inlet channels is provided at least at one end of the cooling plate.

It is preferably provided that a liquid collection hood is provided on the underside of the welding chamber, the bottom part of the liquid collection hood being designed on both sides in such a way that it runs gradually inclined downwards from the side into the center, and that a liquid collection hood drainage pipe is provided on the bottom part of the liquid collection hood is provided.

It is preferably provided that the protective gas inlet pipe is a main feed line for nitrogen, which is provided at both ends of the furnace cover, and that the middle part of the furnace cover is symmetrically provided on both sides with a secondary feed line for nitrogen, which is connected to the interior of the welding chamber.

It is preferably provided that an inlet plate is arranged symmetrically on both sides on the lower part of the furnace cover, with an inlet opening open on the top being provided on the upper part of the inlet plate and enclosing an inlet space together with the furnace cover, and with several air injection holes being arranged at a distance on the inlet plate , which connect the inlet openings with the interior of the welding chamber, while the auxiliary supply line for nitrogen is connected to the inlet opening.

It is preferably provided that the transport unit comprises transport rods and three units provided on the underside of the welding chamber, ie a lifting unit, a displacement unit and a folding unit, there are two symmetrically arranged transport rods and the middle part of the transport rods is located within the welding chamber, and wherein the folding unit, which is connected at the same time to the two transport rods and drives them to fold in and out, is connected to the displacement unit and is driven by it in order to move in the direction close to the ejection end or away from the ejection end, while the lifting unit is connected to the displacement unit and drives them to rise and lower, and that each transport rod is provided with several supports, while several recesses are provided at both ends of the welding table, the recesses corresponding in pairs with the supports.

It is preferably provided that both ends of the welding chamber are closed by end caps and each end cap is symmetrically provided on both sides with a recess for transport, the transport rods being connected to the folding unit through the recess for transport, and the bottom part of the end cap in the Distance from the welding table is arranged.

It is preferably provided that each of the end caps is symmetrically provided at both ends with a mounting groove for the cover plate, the plane in which the mounting groove for the cover plate is located perpendicular to the center line of the support rods so that a cover plate can slide in the mounting groove for Cover plate is attached, wherein the cover plate and the transport rod are slidingly and sealingly connected to one another, and that the end of the welding chamber are sealed by the interaction of the cover plate and the end cap on the corresponding side.

It is preferably provided that each of the end caps is symmetrically provided at both ends with a mounting groove for the cover plate, the plane in which the mounting groove for the cover plate is located perpendicular to the center line of the support rods so that a cover plate can slide in the mounting groove for Cover plate is attached, wherein the cover plate and the transport rod are slidably and sealingly connected to one another, and the cover plate and the corresponding end cap are sealed to the end of the welding chamber.

It is preferably provided that the folding unit comprises a horizontally arranged folding guide plate and a folding force module, wherein the folding guide plate is provided between the two transport rods and is provided on both sides with a folding guide that is gradually inwardly inclined in the direction facing the ejection end Transport rod each has a folding guide wheel resting against the folding guide and a folding spring in the expanded state is provided between the two transport rods, and that the folding force module is connected to the folding guide plate and drives it in the direction close to or away from the ejector end.

It is preferably provided that the lifting unit comprises a lifting guide block and a lifting cylinder for transport, with a lifting guide gradually sloping downward in the direction facing the ejection end being arranged on the upper side of the lifting guide block, and a lifting guide on the underside of the displacement unit being arranged on the lifting guide adjacent lifting guide wheel is provided, and that a piston rod of the lifting cylinder for transport is connected to the lifting guide block and drives it to move in the direction close to the ejection end or away from the ejection end.

It is preferably provided that the suction module comprises a sealing plate and a suction module lifting cylinder, the sealing plate being arranged on the upper side of the heating zone and parallel to the heating zone, and wherein the bottom part of the sealing plate, together with the heating zone, encloses a closed vacuum space which is connected to a suction pipe is.

It is preferably provided that the sealing plate is arranged on the underside of the furnace cover and the suction module lifting cylinder is attached to the top of the furnace cover, the piston rod of the suction module lifting cylinder being connected to the sealing plate via a connecting pipe, and the connecting pipe connecting the vacuum chamber to the suction pipe .

It is preferably provided that the vacuum welding furnace further comprises a cleaning module, wherein the inlet end and the outlet end of the cleaning module are each connected to the interior of the welding chamber.

It is preferably provided that the cleaning module has a cleaning box on both sides of which the inlet end and the outlet end are arranged, a corrugated tube arranged in the cleaning box that is filled with circulating cooling liquid, and a sieve that is provided near the outlet end and closes the outlet end, wherein a fan is provided between the outlet end of the cleaning box and the welding chamber.

It is preferably provided that the cleaning module further comprises ribs arranged in the cleaning box.

1. 1) Schließen der Schweißkammer durch die Ofenabdeckung und Zuführen des Schutzgases über das Schutzgaseinlassrohr in die Schweißkammer;
2. 2) Transportieren der Stoffblätter Blatt für Blatt in den Unterdruckraum durch die Transporteinheit und allmähliches Erwärmen der Stoffblätter im Transportprozess durch die Heizzone;
3. 3) Transportieren der im Unterdruckraum fertiggeschweißten Stoffblätter zum Auswerfende durch die Transporteinheit und allmähliches Abkühlen der Stoffblätter durch die Kühlzone.

A welding method for a vacuum welding furnace above can include the following steps:

1. 1) Closing the welding chamber by means of the furnace cover and feeding the protective gas into the welding chamber via the protective gas inlet pipe;
2. 2) Transporting the fabric sheets sheet by sheet into the negative pressure space by the transport unit and gradually heating the fabric sheets in the transport process through the heating zone;
3. 3) Transporting the finished-welded fabric sheets in the vacuum space to the ejection end by the transport unit and gradually cooling the fabric sheets through the cooling zone.

Beneficial effects

1. 1. Die Heizzone des erfindungsgemäßen Vakuumschweißofens kann die Stoffblätter erwärmen, so dass die Stoffblätter schnell in einem Unterdruckraum fertiggeschweißt werden können. Dadurch, dass die Schweißkammer mit Schutzgas gefüllt ist, kann die Reaktion der Stoffblätter mit dem Sauerstoff während des Erwärmungsprozesses vermieden werden. Und die Kühlzone kann die Stoffblätter abkühlen, so dass die Temperatur der aus der Schweißkammer bewegten Stoffblätter so niedrig ist, dass das Oxidieren der Stoffblätter verhindert wird und die geschweißten Stoffblätter sich auch bequem und rechtzeitig verarbeiten lassen. Und während der Verarbeitung der Stoffblätter tritt nicht wegen der Flexibilität bei zu hoher Temperatur das Problem auf, dass die Stoffblätter bei der Verarbeitung sich verformen und es somit zu einer Erhöhung der Ausschussrate führt. Die Stoffblätter stehen im direkten Kontakt mit der Heizzone bzw. der Kühlzone, sodass das Erwärmen und Abkühlen durch Wärmeleitung realisiert werden. Im Vergleich zu dem Erwärmungsverfahren unter Verwendung von Strahlung wird die Heizgeschwindigkeit stark erhöht, so dass die Stoffblätter schnell erwärmt und abgekühlt werden können und der Energieverbrauch reduziert wird.
2. 2. Die mehreren Heizplatten werden in eine Heizzone zusammengebaut, während die mehreren Kühlplatten in eine Kühlzone zusammengebaut werden, so dass in der Schweißkammer gleichzeitig mehrere Stoffblätter aufgenommen und von der Heizzone gleichzeitig aufgeheizt werden können, wodurch der Stoffblätter schnell die Schweißtemperatur erreichen können und die Schweißgeschwindigkeit somit erhöht wird.
3. 3. Jede Heizplatte ist mit einem Elektroheizrohr und einem Temperatursensor versehen, so dass bei jeder Heizplatte eine unabhängige Temperaturregelung realisiert wird. Somit können die Stoffblätter während ihres Transportprozesses schrittweise erwärmt werden, wodurch es vermieden werden soll, dass wegen zu schneller Erwärmung die Stoffblätter sich verformen und die Lötpaste schmilzt und herausfließt, was zu Ausschüssen führt.
4. 4. Jede Kühlplatte ist mit einem Einströmkanal und einem Ausströmkanal versehen, so dass eine schrittweise Abkühlung der Stoffblätter realisiert wird. Dadurch wird verhindert, dass die erstarrte Lötpaste aufgrund eines übermäßigen Temperaturabfalls gerissen wird. Dies führt zu einem schlechten Kontakt zwischen dem Chip und den Stoffblättern und somit das Entstehen der Ausschüsse. Es ist auch möglich, eine Verformung der Stoffblätter zu vermeiden.
5. 5. Mittels der Flüssigkeitssammlungshaube können die aufgrund der Kondensation in der Kühlzone gebildeten Flüssigkeiten durch das Abflussrohr der Flüssigkeitssammlungshaube abgelassen werden.
6. 6. An beiden Enden der Ofenabdeckung ist jeweils eine Hauptzuleitung für Stickstoff vorgesehen, während der mittlere Teil der Ofenabdeckung beidseitig symmetrisch mit einer Nebenzuleitung für Stickstoff versehen ist, wodurch sichergestellt wird, dass die Schweißkammer schnell mit dem Stickstoff gefüllt ist. Somit sind eine kurze Vorbereitungszeit vor dem Schweißen und eine bequeme Bedienung möglich.
7. 7. Über die Einlassplatte wird der Stickstoff von der Nebenzuleitung für Stickstoff gleichmäßig in die Schweißkammer eingespritzt, so dass die Luft in der Schweißkammer vollständig entleert werden kann, um zu verhindern, dass die erwärmten Stoffblätter mit Sauerstoff reagieren.
8. 8. Die Klappeinheit treibt die beiden Transportstangen zum Ein- und Ausklappen an und wirkt derart mit der Hebeeinheit zusammen, dass die Stützungen in die Aussparung des Schweißtisches hineinragen und die Stoffblätter durch ihre beiden Enden abstützen. Durch die Transportstangen werden die Stoffblätter von der Verschiebungseinheit angetrieben, sich zu verschieben, wodurch die Verschiebung der Stoffblätter erfolgt.
9. 9. Die Transportstangen ragen durch die Ausnehmung zum Transport aus der Schweißkammer heraus und sind mit der Klappeinheit verbunden, wodurch nicht nur die Stoffblätter in der Schweißkammer transportiert werden, sondern auch die Stoffblätter in die Schweißkammer eintransportiert und die in der Schweißkammer fertiggeschweißten Stoffblätter von der Schweißkammer austransportiert werden können. Während des Schweißvorgangs können die Stoffblätter hinein- und herausbewegt werden, ohne die Ofenabdeckung zu öffnen.
10. 10. Mit der Bewegung der Transportstangen bewegt die Deckplatte sich in der Montagenut für Deckplatte, so dass die Schweißkammer rechtzeitig geschlossen werden kann, um das Austreten des Schutzgases zu vermeiden und den Verbrauch des Schutzgases zu verringern sowie die Schweißkosten zu reduzieren.
11. 11. Die Klappeinheit ist mit den auf der Unterseite der Schweißkammer vorgesehenen Montagearmen für Transport verbunden, was die Verbindung der Transportstangen erleichtert.
12. 12. Das Klappkraftmodul veranlasst die Klappführungsplatte zu bewegen, wobei die Klappführung der Klappführungsplatte durch das Klappführungsrad die beiden Transportstangen antreibt, um sich synchron in entgegengesetzte Richtungen zu bewegen. Die Klappfeder lässt das Klappführungsrad immer an die Klappführung der Klappführungsplatte fest anpressen und somit das Ein- und Ausklappen der beiden Transportstangen realisiert wird, was einerseits den Transport der Stoffblätter erleichtert und auch verhindern kann, dass die Transportstangen den Betrieb des Absaugmoduls behindert. Andererseits wird die Endkappe wegen des stabilen Wegs der Transportstangen nicht beschädigt.
13. 13. Der Hubzylinder veranlasst den Hubführungsblock zu verschieben. Die Hubführung des Hubführungsblocks treibt über das Hubführungsrad die Verschiebungseinheit zum Anheben und Absenken an, wodurch das synchrone Anheben und Absenken der beiden Transportstangen realisiert wird und es sichergestellt wird, dass die Hubbewegung der Transportstangen stabil ist und die Schweißkammer aufgrund des bestimmten Hubwegs nicht beschädigt wird.
14. 14. Die Dichtplatte schließt gemeinsam mit der Heizzone einen Unterdruckraum ein und kann von dem Absaugmodulhubzylinder zum Anheben und Absenken angetrieben werden, wodurch die Stoffblätter bequem in den Unterdruckraum hinein oder aus demselben heraus bewegt werden.
15. 15. Der Absaughubzylinder ist über das Verbindungsrohr mit der Dichtplatte verbunden und treibt die Dichtplatte zum Anheben und Absenken an, wobei das Absaugrohr über das Verbindungsrohr mit dem Inneren des Unterdruckraumes verbunden ist, was nicht nur die Installation und die Verbindung der Dichtplatte vereinfacht, aber auch das Absaugen des Unterdruckraums erleichtert.
16. 16. Das Reinigungsmodul kann das Schutzgas von der Schweißkammer absaugen und den Schweißöldampf im Schutzgas entfernen. Damit wird vermieden, dass das Schweißen der Stoffblätter von dem aus der erwärmten Lötpaste erzeugten übermäßigen Schweißöldampf beeinflusst wird.
17. 17. Das Wellungsrohr führt durch die Kühlflüssigkeit seinen Wärmeaustausch mit dem abgesaugten Schutzgas durch und senkt die Temperatur des Schutzgases, so dass der Schweißöldampf verflüssigt wird. Anschließend wird das Schutzgas durch das Sieb gefiltert und dann verbleibt das Schweißöl auf dem Sieb, wodurch die Trennung von dem Schweißöl und dem Schutzgas realisiert wird.
18. 18. Die Rippen können die Wärmeaustauschfläche zwischen der Kühlflüssigkeit und dem Schutzgas vergrößern, um das Schutzgas schnell abzukühlen, somit kann das Schweißöl vom Schutzgas gründlicher entfernt werden. 19. Das Schweißverfahren schützt durch das Schutzgas die Stoffblätter in der Schweißkammer, verhindert, dass bei hoher Temperatur die Stoffblätter mit dem Sauerstoff reagieren. Die Heizzone kann die Stoffblätter schrittweise erwärmen, damit die Temperatur der Stoffblätter dann die Schweißtemperatur erreicht oder nahe an der Schweißtemperatur liegt, wenn die Stoffblätter sich in den Unterdruckraum bewegen. Deswegen können die Stoffblätter während der Schweißzeit in dem Unterdruckraum schnell fertiggeschweißt werden. Dadurch wird die Schweißzeit verkürzt und die Schweißgeschwindigkeit erhöht. Die schrittweise Abkühlung der Stoffblätter durch die Kühlzone kann nicht nur eine gründliche Abkühlung sicherstellen, sondern auch eine durch zu schnelle Abkühlung verursachte Verformung der Stoffblätter vermeiden.

Compared to the prior art, the present application has the following advantageous effects:

1. 1. The heating zone of the vacuum welding furnace according to the invention can heat the sheets of fabric so that the sheets of fabric can be finished welded quickly in a vacuum space. Because the welding chamber is filled with protective gas, the reaction of the fabric sheets with the oxygen during the heating process can be avoided. And the cooling zone can cool the fabric sheets so that the temperature of the fabric sheets moved out of the welding chamber is so low that the oxidizing of the fabric sheets is prevented and the welded fabric sheets can also be processed conveniently and in good time. And during the processing of the fabric sheets, because of the flexibility at too high a temperature, the problem does not arise that the fabric sheets are deformed during processing and thus lead to an increase in the reject rate. The fabric sheets are in direct contact with the heating zone or the cooling zone, so that the heating and cooling are carried out by conduction. Compared with the heating method using radiation, the heating speed is greatly increased, so that the fabric sheets can be heated and cooled quickly and the energy consumption is reduced.
2. 2. The multiple heating plates are assembled into one heating zone, while the multiple cooling plates are assembled into one cooling zone, so that several sheets of fabric can be accommodated in the welding chamber and simultaneously heated by the heating zone, whereby the sheets of fabric can quickly reach the welding temperature and the welding speed thus is increased.
3. 3. Each heating plate is provided with an electric heating tube and a temperature sensor so that an independent temperature control is implemented for each heating plate. The fabric sheets can thus be heated gradually during their transport process, which is intended to prevent the fabric sheets from deforming due to excessive heating and the soldering paste from melting and flowing out, which leads to rejects.
4. 4. Each cooling plate is provided with an inflow channel and an outflow channel so that the material sheets are gradually cooled. This prevents the solidified solder paste from cracking due to an excessive drop in temperature. This leads to poor contact between the chip and the fabric sheets and thus the creation of rejects. It is also possible to prevent the sheets of fabric from being deformed.
5. 5. By means of the liquid collection hood, the liquids formed due to the condensation in the cooling zone can be drained through the drain pipe of the liquid collection hood.
6. 6. A main feed line for nitrogen is provided at both ends of the furnace cover, while the middle part of the furnace cover is symmetrically provided on both sides with a secondary feed line for nitrogen, which ensures that the welding chamber is quickly filled with nitrogen. This enables a short preparation time before welding and convenient operation.
7. 7. The nitrogen is injected evenly into the welding chamber via the inlet plate from the secondary supply line for nitrogen, so that the air in the welding chamber can be completely emptied in order to prevent the heated fabric sheets from reacting with oxygen.
8. 8. The folding unit drives the two transport rods to fold in and out and cooperates with the lifting unit in such a way that the supports protrude into the recess of the welding table and support the fabric sheets through their two ends. By means of the transport rods, the fabric sheets are driven by the displacement unit to move, whereby the fabric sheets are displaced.
9. 9. The transport rods protrude through the recess for transport out of the welding chamber and are connected to the folding unit, whereby not only the sheets of fabric are transported in the welding chamber, but also the sheets of fabric are transported into the welding chamber and the sheets of fabric that are completely welded in the welding chamber are transported from the welding chamber can be transported out. During the welding process, the fabric sheets can be moved in and out without opening the furnace cover.
10. 10. With the movement of the transport rods, the cover plate moves in the mounting groove for the cover plate, so that the welding chamber can be closed in good time in order to prevent the shielding gas from escaping and to reduce the shielding gas consumption and to reduce welding costs.
11. 11. The folding unit is connected to the mounting arms for transport provided on the underside of the welding chamber, which facilitates the connection of the transport rods.
12. 12. The folding force module causes the folding guide plate to move, the folding guide of the folding guide plate driving the two transport rods through the folding guide wheel in order to move synchronously in opposite directions. The folding spring allows the folding guide wheel to always press firmly against the folding guide of the folding guide plate and thus the folding and unfolding of the two transport rods is realized, which on the one hand facilitates the transport of the fabric sheets and can also prevent the transport rods from interfering with the operation of the suction module. On the other hand, the end cap is not damaged because of the stable path of the transport rods.
13. 13. The lift cylinder causes the lift guide block to move. The lifting guide of the lifting guide block drives the displacement unit for lifting and lowering via the lifting guide wheel, whereby the synchronous lifting and lowering of the two transport rods is realized and it is ensured that the lifting movement of the transport rods is stable and the welding chamber is not damaged due to the specific lifting path.
14. 14. The sealing plate, together with the heating zone, encloses a negative pressure space and can be driven by the suction module lifting cylinder to raise and lower it, whereby the fabric sheets are conveniently moved into or out of the negative pressure space.
15. 15. The suction lift cylinder is connected to the sealing plate via the connecting pipe and drives the sealing plate to raise and lower it, the suction pipe being connected to the interior of the vacuum chamber via the connecting pipe, which not only simplifies the installation and connection of the sealing plate, but also the suction of the negative pressure space facilitated.
16. 16. The cleaning module can extract the shielding gas from the welding chamber and remove the welding oil vapor in the shielding gas. This prevents the welding of the fabric sheets from being affected by the excessive welding oil vapor generated from the heated solder paste.
17. 17. The corrugated tube carries out its heat exchange with the extracted protective gas through the cooling liquid and lowers the temperature of the protective gas so that the welding oil vapor is liquefied. The protective gas is then filtered through the sieve and then the welding oil remains on the sieve, whereby the welding oil and the protective gas are separated.
18. 18. The fins can enlarge the heat exchange area between the cooling liquid and the shielding gas in order to cool the shielding gas quickly, so that the welding oil can be removed more thoroughly by the shielding gas. 19. The welding process uses the shielding gas to protect the sheets of fabric in the welding chamber, and prevents the sheets of fabric from reacting with the oxygen at high temperatures. The heating zone can gradually heat the fabric sheets so that the temperature of the fabric sheets then reaches the welding temperature or is close to the welding temperature when the fabric sheets move into the negative pressure space. Because of this, the fabric sheets can quickly be finished welded during the welding time in the negative pressure space. This shortens the welding time and increases the welding speed. The gradual cooling of the fabric sheets by the cooling zone can not only ensure thorough cooling, but also avoid deformation of the fabric sheets caused by too rapid cooling.

Figure list

• 1 Fig. 3 is a schematic perspective view of a vacuum welding furnace.
• 2 Fig. 3 is a schematic perspective view of an oven cover.
• 3 Fig. 3 is a front schematic sectional view of the oven cover.
• 4th FIG. 11 shows a detail of an enlarged view of A in FIG 3 .
• 5 Fig. 3 is a front schematic sectional view of an inlet plate.
• 6th Figure 3 is a schematic perspective view of the vacuum welding furnace after the furnace cover has been removed.
• 7th FIG. 11 shows a detail of an enlarged view of B in FIG 6th .
• 8th Fig. 3 is a schematic perspective view of a welding table.
• 9 Fig. 3 is a schematic right side view of the welding table.
• 10 Fig. 3 is a schematic sectional plan view of a heating plate.
• 11 Fig. 3 is a schematic sectional plan view of a cooling plate.
• 12th Fig. 3 is a front schematic sectional view of a mounting member of the welding chamber.
• 13th Fig. 3 is a front schematic sectional view of a mounting pin.
• 14th Figure 3 is a schematic front view of a suction module.
• 15th Figure 3 is a schematic perspective view of a transport unit.
• 16 Fig. 3 is a schematic front view of the transport unit.
• 17th Fig. 13 is a schematic perspective view of a cleaning module of the welding oil.
• 18th Figure 3 is a front schematic sectional view of the cleaning module.

List of reference symbols

1.

Machine frame

2.

Transport unit

3.

Oven cover cylinder

4th

Oven cover

5.

Main supply line for nitrogen

6th

Guide hood

7th

Cleaning inlet pipe

8th.

Cleaning outlet pipe

9.

Suction module

10.

Link arm

11.

Swing arm

12th

Mounting arm

13th

Connecting rod

14th

Oven cover mounting plate

1401

Assembly opening

15th

Gas hood

16.

Secondary feed line for nitrogen

17th

Inlet plate

1701.

Inlet opening

1702.

Air injection hole

18th

Welding chamber

19th

Ejection table

1901.

Recess of the ejector table

20th

Welding table

21.

Loading table

2101

Recess of the loading table

22nd

Mounting plate

23

Adjusting spring

24

Transport bar

25th

Sealing envelope

26th

End cap

2601.

Recess for transport

2602.

Mounting groove for cover plate

27

Cover plate

28.

Cooling plate

2801

Cooling plate recess

2802.

Inflow duct

2803

Outflow channel

2804.

Mounting hole for cooling plate

29

Water inlet pipe

30th

Heating plate

3001

Heating plate recess

3002

Electric heating pipe receiving hole

3003

Sensor receiving hole

3004

Hot plate mounting hole

31.

Electric heating pipe

32.

Temperature sensor

33.

Liquid collection hood

3301

Liquid collection hood drain pipe

34.

Extraction module mounting bracket

35.

Suction module lifting cylinder

36.

Sealing plate

37.

Connecting pipe

38.

Connecting plate

39.

Mounting pin

3901.

Threaded hole

40

Welding chamber mounting element

4001

Fastening section

4002.

Step hole

41.

Displacement plate

42.

Folding assembly bar

43.

Folding guide plate

44.

Folding guide wheel

45.

Mounting arm for transport

46.

Lift cylinder for transport

47.

Lift guide bracket

48.

Lift guide block

49.

Displacement bracket

50.

Displacement bracket guide rail

51.

Shift plate guide rail

52.

Mounting plate for transport

53.

Displacement motor

54.

Shift motor mounting bracket

55.

Displacement beam

56.

Folding movement bracket

57.

Folding electric motor mounting bracket

58.

Folding electric motor

59.

Cleaning module

60.

Oil supply

61.

Cleaning box

62.

Inlet pipe for cleaning box

63.

Sieve mounting box

64.

Sieve

65.

fan

66.

Collecting container for solder paste

67.

Corrugated tube

68.

Ribs

Embodiments of the invention

1 to 18th are preferred embodiments of the present application. The present application is described below with reference to 1 to 18th specified.

This is a vacuum welding furnace, comprising a welding chamber 18th , an oven cover 4th and a transport unit 2 , with the oven cover 4th on top of the welding chamber 18th covered in a sealing manner, thus between the welding chamber 18th and the Oven cover 4th a welding space is formed, and wherein at the lower part of the welding chamber 18th a welding table 20th is provided. A side of the welding table facing the end of the drawer 20th is a heating zone, while a side of the welding table facing the ejection end 20th is a cooling zone, with a suction module on the upper side of an end of the heating zone facing the cooling zone 9 is provided that can be raised and lowered on the furnace cover 4th is attached, the bottom part of the suction module 9 together with the heating zone encloses a tightly sealed vacuum space, and that a protective gas inlet pipe on the welding chamber 18th or the oven cover 4th is provided. The heating zone of the vacuum welding furnace according to the invention can heat the sheets of fabric so that the sheets of fabric can be finished welded quickly in the vacuum space. By having the welding chamber 18th is filled with protective gas, the reaction of the fabric sheets with the oxygen during the heating process can be avoided. And the cooling zone can cool the fabric sheets, so that the temperature of the out of the welding chamber 18th moving fabric sheets is so low that the oxidizing of the fabric sheets is prevented and the welded fabric sheets can also be processed comfortably and in good time. And during the processing of the fabric sheets, because of the flexibility at too high a temperature, the problem does not arise that the fabric sheets are deformed during processing and thus lead to an increase in the reject rate. The fabric sheets are in direct contact with the heating zone or the cooling zone, so that the heating and cooling are carried out by conduction. Compared with the heating method using radiation, the heating speed is greatly increased, so that the fabric sheets can be heated and cooled quickly and the energy consumption is reduced.

The present application is described in more detail below with reference to the specific exemplary embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings serves for better illustration.

Specific as in 1 shown is the welding chamber 18th designed as a cuboid box with an open top. The two ends of the welding chamber 18th are each a loading end and an ejection end and the welding chamber 18th is on the top of the machine frame 1 appropriate. The transport unit 2 is on the machine frame 1 on the underside of the welding chamber 18th appropriate. The oven cover 4th is on top of the welding chamber 18th attached and closes the welding chamber from the top 18th . On the oven cover 4th is the suction module 9 provided, its lower end through the furnace cover 4th through into the welding chamber 18th protrudes, whereby the suction module 9 is arranged between the heating zone and the cooling zone. Several suction modules can be used here 9 be provided in order to increase the welding speed, but only a single one can also be provided.

At two ends of the machine frame 1 is symmetrical in each case a connecting arm 10 provided with the upper end of the link arm 10 protrudes upwards and over the welding chamber 18th stands. At two ends of the oven cover 4th is symmetrically a horizontally arranged mounting arm 12th provided with one end of each mounting arm 12th firmly to the oven cover 4th is connected and the other end is rotatable with the upper end of the connecting arm 10 connected is. The oven cover 4th is also with an oven cover cylinder 3 connected, which drives the oven cover to open and close. A piston rod of the furnace cover cylinder 3 is about the connecting rod 13th and the swing arm 11 with the mounting arm 12th connected. The top of the mounting arm 12th is rotatable with the middle part of the mounting arm 12th connected. The lower end of the mounting arm 12th is rotatable with the middle part of the connecting rod 13th connected. One end of the connecting rod 13th is rotatable with the machine frame 1 or the link arm 10 connected, while the other end is rotatable with the piston rod of the furnace cover cylinder 3 is connected, whereby an automatic opening and closing of the oven cover 4th is realized.

As in 2 shown includes the oven cover 4th an oven cover hood on its top and an oven cover mounting plate on its underside 14th . The furnace cover hood is designed as a cuboid box with an open underside, and the furnace cover mounting plate 14th is designed in the form of a rectangular plate. The oven cover mounting plate 14th is arranged on the underside of the furnace cover hood and closes the lower opening of the furnace cover hood. Both the mounting arm 12th as well as the extraction module are on the furnace cover mounting plate 14th appropriate.

In the present exemplary embodiment, the protective gas is nitrogen, which is why the protective gas inlet pipe is the main feed line for nitrogen 5 . At both ends of the oven cover mounting plate 14th for is a main feed line for nitrogen 5 provided and the upper end of the main supply line for nitrogen 5 protrudes from the furnace cover hood. Any main supply line for nitrogen 5 is on top with a guide hood 6th provided, which are spaced on top of the corresponding main supply line for nitrogen 5 and at a distance from the top of the main nitrogen feed line 5 is arranged. The cylindrical guide hood 6th and the main supply line for nitrogen 5 are arranged vertically. The guide hood 6th is provided on the top of the furnace cover hood and with the main supply line for nitrogen 5 arranged coaxially to one another. Through the guide hood 6th can be the one with the main supply line for nitrogen 5 connected lines. Between each main nitrogen supply line 5 and the oven cover mounting plate 14th is a gas hood each 15th arranged. The left and right sides of the upper part of the gas hood 15th are gradually inclined inwards from bottom to top, thereby opening the gas hood 15th between the oven cover mounting plate 14th for furnace cover and the furnace cover hood attached. The bottom of the gas hood 15th is open and fixed to the mounting plate 14th connected for oven cover, being at the bottom of the oven cover 4th an elongated hole is provided through which the gas hood 15th with the inside of the welding chamber 18th is connected so that the shielding gas evenly enters the welding chamber 18th can be injected.

On top of the oven cover mounting plate 14th are also a cleaning inlet tube 7th and a cleaning outlet pipe 8th intended. The cleaning inlet pipe 7th and the cleaning outlet pipe 8th are each through the gas hood 15th with the inside of the welding chamber 18th connected and on the same side of the suction module 9 arranged. This can prevent the welding oil vapor from settling in the welding chamber because the nitrogen temperature is too low 18th liquefied, so that the temperature of the fabric sheets is lower and thus the welding time of the fabric sheets is increased. The cleaning outlet pipe 8th is with the inlet end of the cleaning module 59 connected. The cleaning outlet pipe 8th is with the inlet end of the cleaning module 59 connected, whereby the welding oil vapor generated from the welding oil contained in the soldering paste by heat can be purified and preventing the welding oil vapor from affecting the welding of the fabric sheets.

Based 3 to 5 is the middle part of the oven cover mounting plate 14th also symmetrical on both sides with a secondary supply line for nitrogen 16 on top of the oven cover mounting plate 14th is arranged. The outlet end of the nitrogen bypass line 16 is with the inside of the welding chamber 18th connected in such a way that the nitrogen flows more evenly into the welding chamber 18th can be injected and ensures that the nitrogen is removed from the welding chamber 18th completely drained to prevent the fabric sheets from reacting with oxygen after heating. On the underside of the middle part of the mounting plate 14th for furnace cover is an inlet plate 17th arranged, which is formed as a rectangular plate. At the top of the inlet plate 17th is an inlet opening that is open at the top 1701 provided in the form of one along the length direction of the inlet plate 17th provided elongated hole is designed. On each side of the oven cover mounting plate 14th are two inlet plates each 17th provided one behind the other along the length direction of the oven cover mounting plate 14th placed on each inlet plate 17th several air injection holes 1702 spaced along the length direction so that a uniform injection of nitrogen into the welding chamber 18th can be guaranteed. On the underside of the oven cover mounting plate 14th is an inwardly dented assembly opening 1401 provided with the inlet plate 17th corresponds in pairs. The upper part of the inlet plate 17th is in the assembly opening 1401 from the oven cover mounting plate 14th attached to the inlet port 1701 each inlet plate 17th together with the assembly opening 1401 from the oven cover mounting plate 14th includes an inlet space connected to the exit end of the nitrogen bypass line 16 is connected so that the injection of nitrogen into the inlet space is facilitated.

Based 6th to 7th includes the transport unit 2 Transport bars 24 and three on the bottom of the welding chamber 18th provided units, ie a lifting unit, a displacement unit and a folding unit. The middle part of the transport bars 24 is in the welding chamber 18th arranged with the two ends of the welding chamber 18th each through an end cap 26th are closed and each end cap 26th with a recess on both sides for transport 2601 is provided. The transport bars 24 are horizontal along the length direction of the welding chamber 18th arranged, the two transport rods 24 symmetrical on both sides of the welding chamber 18th are arranged. Both ends of each transport bar 24 run through the recess for transport 2601 the end cap 26th through and protrude from it. On the underside of the welding chamber 18th are mounting arms for transport 45 mounted horizontally with the transport bars 24 correspond in pairs, with the mounting arm for transport 45 each on the underside of the associated transport rod 24 is arranged. Both ends of each transport bar 24 are over the mounting plate 22nd with the corresponding mounting arm for transport 45 connected. The top of the mounting plate 22nd and the transport bar 24 are interconnected while the lower end of the mounting plate 22nd and the mounting arm for transport 45 are connected to each other. The displacement unit is on the machine frame 1 Attached lifting unit arranged, while the folding unit on the Displacement unit is stored and at the same time with the two transport rods 24 is connected, whereby the folding and unfolding, raising and lowering as well as moving the two transport bars 24 are possible and the transport of the fabric sheets is facilitated.

Between one end of each transport bar 24 and the mounting plate 22nd is an adjusting spring 23 arranged, which on the transport rod 24 is put on. One of the adjustment spring 23 facing end of the transport rod 24 stands with the mounting plate 22nd in sliding connection, with the adjustment spring 23 on the outside of the mounting plate 22nd is arranged. One end of the adjustment spring 23 is on the mounting plate 22nd supported, while the other end opposite the end of the transport rod 24 is stored so that the position adjustment of the transport rod 24 is facilitated in the axial direction. The adjusting spring 23 can also take on the damping function and thus prevent the fabric sheets from falling off due to the shock loads generated during transport.

The bottom of the at both ends of the welding chamber 18th attached end cap 26th is spaced from the top of the welding table 20th arranged so that at both ends of the welding chamber 18th a loading end and an ejecting end are formed, with an end facing the heating zone being the loading end of the welding chamber 18th is, while an end facing the cooling zone is the ejection end of the welding chamber 18th is. At both ends of each end cap 26th is a vertically arranged mounting groove 2602 intended for cover plate. In the mounting groove 2602 for cover plate is a cover plate 27 Slidably attached to the transport bar 24 is in sliding connection, with between the cover plate 27 and the transport bar 24 a sealing connection is formed. The cover plate 27 closes the recess for transport 2601 . This can cause the cover plate 27 during the transport of the fabric sheets through the transport bar 24 with the transport bar 24 together in the plane in which the end cap 26th is located, move so that the cover plate 27 always the recess for transport 2601 closes to prevent nitrogen leakage. Thereby, the restriction of the size of the recess for transport is also imposed 2601 canceled and thus the path of movement of the transport bars 24 simply set. The cover plate 27 can also cover the gap between the end cap 26th and the welding table 20th , ie the loading end or ejecting end, close, whereby the ejecting end is opened when the fabric sheets from the transport bars 24 The sheets of fabric can easily be propped up in the welding chamber 18th and to be transported from it and to avoid leakage of nitrogen. Both ends of each transport bar 24 are each with a sealing cover 25th provided through which each transport rod 24 sliding and sealing with the cover plate 27 connected is.

As in 8th shown includes the welding table 20th several heating plates 30th and several cold plates 28 . The multiple heating plates 30th are one behind the other along the length direction of the welding chamber 18th arranged to form a heating zone. The multiple cooling plates 28 are one behind the other along the length direction of the welding chamber 18th arranged to form a cooling zone, the cooling zone being located near the ejection end. The suction module 9 is on the top of one end of the heating plate facing the cooling zone 30th intended.

Both ends of each heating plate 30th are symmetrical with a heating plate recess 3001 provided while both ends of each cooling plate 28 symmetrical with a cooling plate recess 2801 are provided. On every transport bar 24 several supports are provided at a distance. The supports protrude into the heating plate recess 3001 or the cooling plate recess 2801 into it and support it flat on the heating plate 30th or the cooling plate 28 sheets of fabric lying down so that the sheets of fabric as a whole on the heating plate 30th or the cooling plate 28 can be placed. On the one hand, this prevents the fabric sheets from being softened by heat, which leads to a deformation of both ends. On the other hand, the sealing of the suction module 9 and the heating plate 30th facilitated.

Any hot plate 30th is symmetrical on both sides with an electric heating pipe 31 provided, with a temperature sensor 32 on the heating plate 30th between the two electric heating pipes 31 is arranged, giving independent control of each heating plate 30th is achieved. The temperature of the heating plate 31 is thus gradually increased in the direction facing the ejecting end, whereby the sheets of fabric are gradually heated to avoid the solder paste from dripping due to the rapid heating. Any cold plate 28 is with a water inlet pipe 29 connected. The cooling plate 28 leaves the fabric sheets on the cooling table through cooling water 28 cool down, taking the temperature of the cooling table 28 in the direction facing the ejecting end gradually decreases, whereby the fabric sheets are gradually cooled in order to avoid the cracking of the solidified solder paste caused by too rapid cooling.

On the outside of the loading end of the welding chamber 18th is a loading table 21 provided, each with a suitable recess for support at both ends 2101 of the loading table is provided. As long as the sheets of cloth on the loading table 21 are placed, they are then replaced by the Transport unit 2 on the welding table 20th in the welding chamber 18th transported. The ejection end of the welding chamber 18th is with an ejector table 19th provided with both ends of the ejector table 19th each with a suitable recess for support 1901 of the ejection table are provided. The transport unit 2 transports the cooled fabric sheets to the ejection table 19th , so that in the present vacuum welding furnace, continuous welding is realized and ejection and loading are possible without the furnace cover 4th to open.

As in 9 shown is the bottom part of the welding chamber 18th with a liquid collection hood 33 provided, the liquid collection hood 33 is designed on both sides in such a way that it runs gradually inclined downward from the side part into the middle, and at both ends of the middle part of the liquid collection hood 33 one liquid collection hood drain pipe each 3301 is provided symmetrically. Through the liquid collection hood 33 the water droplets formed by liquefaction in the cooling zone can be collected and removed from the welding chamber 18th be drained, eliminating the nuisance of welding the sheets of fabric in the welding chamber 18th be avoided.

Out 10 it can be seen that the heating plate 30th is a rectangular plate with a hot plate mounting hole 3004 at one corner of the heating plate 30th is provided. An electric heating pipe receiving hole 3002 is on both sides of the heating plate 30th symmetrically arranged, with the Elektroheizrohraufnahmeloch 3002 is for a horizontally arranged through hole. An electric heating pipe 31 is in each electrical heating pipe receiving hole 3002 attached, which ensures even heating. The middle part of the heating plate 30th is also with a horizontally arranged sensor receiving hole 3003 provided, which is a parallel to the Elektroheizrohraufnahmeloch 3002 arranged blind hole is. And the length of the sensor receiving hole 3003 is half the length of the heating plate 30th . The temperature sensor 32 is in the sensor receiving hole 3003 attached so that the temperature of the heating plate 30th can be recorded in real time.

As in 11 shown is the cooling plate 28 such a rectangular plate, the length and width of which is equal to the length and width of the heating plate 30th are. On one corner of the cooling plate 28 is a cold plate mounting hole 2804 intended. The cooling plate 28 is symmetrical on both sides with a horizontally designed inflow channel 2802 provided along the length direction of the cooling plate 28 is provided. And at one end of the cold plate 28 is a horizontally designed outflow channel 2803 arranged through which the two inflow channels 2802 are interconnected, so that a uniform temperature of the whole cooling plate 28 and thus a good cooling effect can be made possible. The outflow channel 2803 and the inflow channels 2802 are provided with a connection section on both sides to establish the connection between the water supply pipe 29 and to facilitate the water drainage pipe.

As in 12-13 shown is the welding chamber 18th on the top of the machine frame 1 arranged, the welding chamber 18th via welding chamber mounting elements 40 firmly to the machine frame 1 connected is. Multiple welding chamber mounting elements 40 are on both sides of the welding chamber 18th symmetrically arranged. On the underside of each welding chamber mounting element 40 is a downwardly protruding fastening section symmetrically on both sides 4001 provided, which is provided with a through hole. The welding chamber mounting elements 40 are through the in the through hole of the mounting portion 4001 provided screws firmly to the machine frame 1 connected. At both ends of the welding chamber mounting element 40 is a symmetrical step hole 4002 intended. The diameter of the top of the step hole 4002 is larger than the diameter of the lower part. In every step hole 4002 is a cylindrical assembly pin 39 appropriate. At the bottom of the mounting pin 39 is a threaded hole coaxially 3901 arranged, the threaded hole 3901 one on the mounting pin 39 intended blind hole. The diameter of the mounting pin 39 is the same diameter as the top of the step hole 4002 identical. The lower end of the mounting pin 39 extends into the top of the step hole 4002 and is fixed to the weld chamber mounting member by the screws 40 connected. The hot plate mounting hole 3004 the heating plate 30th is on the top of the mounting pin 39 put on, thereby mounting the heating plate 30th he follows. The cold plate mounting hole 2804 the cooling plate 28 is on the top of the mounting pin 39 put on, thereby mounting the cooling plate 28 is made ready. So assembly and disassembly are also made easier.

It is also off 14th it can be seen that the suction module 9 an extraction module mounting bracket 34 , a sealing plate 36 , a connecting pipe 37 and a suction module lift cylinder 35 includes. The suction module mounting bracket 34 is on top of the oven cover mounting plate 14th appropriate. The suction module lifting cylinder 35 is on the suction module mounting bracket 34 attached, with the piston rod of the suction module lifting cylinder 35 is arranged vertically downwards. The sealing plate 36 is on the underside of the oven cover mounting plate 14th arranged and formed horizontally. The bottom part of the sealing plate 36 is after designed indented on the inside, with a sealing ring on the underside of the sealing plate 36 is provided circumferentially around the outer edge of the sealing plate. The sealing plate 36 and the heating plate 30th together enclose a vacuum space in which the fabric sheets to be welded are arranged. A horizontally arranged connecting plate 38 is on the piston rod of the suction module lifting cylinder 35 attached, the connecting plate 38 on top of the oven cover mounting plate 14th is provided. The connecting pipe 37 is between the connecting plate 38 and the sealing plate 36 arranged and with the oven cover mounting plate 14th connected in a sliding and sealing manner. The lower end of the connecting pipe 37 is connected to the interior of the negative pressure space, while the upper end of the connecting pipe 37 is connected to a suction tube.

As in 15-16 shown is on the underside of the welding chamber 18th a shift plate 41 spaced apart. The mounting arms for transport 45 are between the shift plate 41 and the welding chamber 18th arranged and sliding on the slide plate by a mounting seat 41 appropriate. The shifting unit is with the shifting plate 41 connected and drives the translation plate 41 to move in the direction of transport of the sheets of fabric. On the underside of the shift plate 41 is a horizontally arranged mounting plate for transport 52 spaced apart. The upper part of the mounting plate for transport 52 is symmetrical on both sides with a sliding plate guide rail 51 provided which are parallel to the center line of the transport bar 24 is provided. The translation plate 41 is slidable on the slide plate guide rail by its slide located on the underside 51 appropriate. The mounting plate for transport 52 is also attached to the lifting unit and is raised and lowered together with the lifting unit.

The lifting unit comprises a horizontally arranged sliding bracket 49 , a lift guide block 48 , a lift guide bracket 47 and a lifting cylinder for transport 46 . On the machine frame 1 is a horizontally configured slide bracket guide rail 50 attached, parallel to the translator plate guide rail 51 is arranged. The displacement bracket 49 is slidable on the slide bracket guide rail by its slider provided on the underside 50 appropriate.

The lifting cylinder for transport 46 is horizontal on the machine frame 1 attached, with the piston rod of the lifting cylinder for transport 46 facing towards the sliding bracket 49 is arranged with the slide bracket 49 is connected and thus the displacement bracket 49 presses to move along the feeding direction of the sheets of fabric. The lift guide block 48 is symmetrical on either side of the shift bracket 49 arranged, with a lift guide on top of the lift guide block 48 provided and in the lifting cylinder for transport 46 facing direction is designed gradually inclined upwards. The lift guide bracket 47 corresponds in pairs with the stroke guide block 48 . On the underside of the lift guide bracket 47 a lift guide wheel is attached, which is attached to the corresponding lift guide of the lift guide block 48 rests, thereby raising and lowering the mounting plate for transport 52 is realized. A vertically designed lifting guide rail is on the machine frame 1 arranged with the mounting plate for transport 52 Slidably mounted on the lift guide rail by a lift slide to the mounting plate for transportation 52 respectively.

The displacement unit includes a displacement motor mounting bracket 54 , a displacement beam 55 and a displacement motor 53 . The shift motor mounting bracket 54 is on the underside of the mounting plate for transport 52 arranged and the displacement motor 53 is on the shift motor mounting bracket 54 appropriate. The output shaft of the displacement motor 53 is arranged horizontally and runs parallel to the transport direction of the fabric sheets. On the shift motor 53 a translation spindle is mounted coaxially, which is synchronized with the translation motor 53 turns together. The displacement beam 55 is sliding on the displacement motor mounting bracket 54 attached, being on the displacement beam 55 a shift nut that matches the shift spindle is provided. The top of the displacement beam 55 runs through the mounting plate for transport 52 and is then with the shift plate 41 connected to the translation plate 41 so that it moves synchronously with it. The displacement beam 55 and the mounting plate for transport 52 are arranged sliding.

The folding unit includes a folding mounting bar 42 , a folding guide plate 43 , a folding movement mount 56 , a folding electric motor mounting bracket 57 , a folding movement mount 56 and a folding force module. In the present exemplary embodiment, the folding force module is a folding electric motor 58 . The folding electric motor mounting bracket 57 is on the underside of the mounting plate for transport 52 arranged, the folding electric motor mounting bracket 57 on top with the sliding plate 41 connected and synchronized with the translation plate 41 moved together. The folding electric motor mounting bracket 57 is still with the mounting plate for transport 52 slidingly connected. On the folding electric motor mounting bracket 57 is not just the folding electric motor 58 attached, but also the folding movement bracket 56 is slidably supported. On the output shaft of the folding electric motor 58 a folding spindle is coaxially attached while attached to the folding movement bracket 56 a hinged nut that matches the hinged spindle is provided, the hinged electric motor 58 through the spindle-nut pair, the folding movement bracket 56 drives to move in the direction of transport of the fabric sheets. The translation plate 41 is provided on the top with a mounting rod slide on which the folding assembly rod 42 is slidingly attached. The folding assembly bar 42 is arranged along the transport direction of the sheets of fabric, with the top of the folding movement bracket 56 with the folding assembly rod 42 is connected and drives them to move synchronously while the folding movement bracket 56 sliding with the mounting plate for transport 52 connected is. At both ends of the folding assembly bar 42 is a folding guide plate each 43 provided, which is provided on both sides with a folding guide, wherein the folding guide is designed gradually inwardly inclined along the transport direction. A folding guide wheel 44 is at both ends of each mounting arm for transport 45 attached, between the two mounting arms for transport 45 a folding spring is also provided, via which the folding guide wheel 44 and the folding guide of the folding guide plate 43 rest against each other. Also on the shift plate 41 A guide rail for the mounting arm is attached, which is perpendicular to the folding mounting bar 42 is arranged with the mounting arms for transport 45 are slidably attached to the guide rail for the mounting arm by the hinged slide.

As in the 17th to 18th shown comprises the cleaning module 59 a cleaning box 61 , one in the cleaning box 61 arranged corrugation tube 67 and a sieve 64 . The cleaning box 61 is designed as a cuboid box. On one side of the cleaning box 61 is an inlet pipe 62 intended for cleaning box, while on the other side of the cleaning box 61 an outlet pipe for cleaning box is connected, with a blower 65 between the outlet pipe for the cleaning box and the welding chamber 18th is arranged. The corrugated tube 67 is in the cleaning box 61 arranged and further with an oil supply 60 connected. The oil outlet of the oil supply 60 is with one end of the corrugated tube 67 connected via a circulation pump, and to the other end of the corrugation pipe 67 is the oil supply 60 connected, whereby a circulation of the cooling oil is made possible. Ribs 68 are also in the cleaning box 61 provided and with the corrugated tube 67 connected, so that a rapid heat exchange with nitrogen results and thus the temperature of nitrogen can be lowered. On a side of the cleaning box facing the outlet pipe for the cleaning box 61 is a sieve mounting box 63 provided, through which the outlet pipe for cleaning box with the inside of the cleaning box 61 connected is. The sieve 64 is vertical in the screen mounting box 63 arranged. The cooled nitrogen flows through the sieve 64 and is then drained through the outlet pipe of the cleaning box and again into the welding chamber 18th fed. The sieve 64 is used to filter the liquefied welding oil so that the welding oil vapor is removed from the nitrogen.

On the bottom of the cleaning box 61 is also a collecting tank for welding oil 66 provided, the cleaning box 61 is designed inclined on its underside in such a way that a collecting container for welding oil 66 facing end is lower than the other end, so that the cooled and liquefied liquids in the sump for welding oil 66 can flow.

1. 1) Schließen der Schweißkammer 18 mit der Ofenabdeckung 4 und Zuführen des Schutzgases über das Schutzgaseinlassrohr in die Schweißkammer 18; Durch die Hauptzuleitung für den Stickstoff 5 und die Nebenzuleitung für den Stickstoff 16 wird Stickstoff in die Schweißkammer 18 zugeführt, so dass die gesamte Schweißkammer 18 mit Stickstoff vollgefüllt wird und die Luft aus der Schweißkammer 18 vollständig entleert wird. Gleichzeitig erwärmt das Elektroheizrohr 31 die Heizplatte 30 und das Wasserzuflussrohr 29 leitet das Kühlwasser in die Kühlplatte 28.
2. 2) Transportieren der Stoffblätter Blatt für Blatt in den Unterdruckraum durch die Transporteinheit 2 und allmähliches Erwärmen der Stoffblätter im Transportprozess durch die Heizzone;

A welding process for the vacuum welding furnace mentioned above includes the following steps:

1. 1) Closing the welding chamber 18th with the oven cover 4th and supplying the protective gas into the welding chamber via the protective gas inlet pipe 18th ; Through the main supply line for the nitrogen 5 and the secondary line for the nitrogen 16 gets nitrogen into the welding chamber 18th fed so that the entire welding chamber 18th is filled with nitrogen and the air out of the welding chamber 18th is completely emptied. At the same time, the electric heating pipe warms up 31 the hot plate 30th and the water inlet pipe 29 directs the cooling water into the cooling plate 28 .
2. 2) Transporting the fabric sheets sheet by sheet into the negative pressure space by the transport unit 2 and gradually heating the fabric sheets as they are transported through the heating zone;

The sheets of fabric are on the loading table 21 placed. The lifting unit drives the transport bars 24 started moving down. The folding unit drives the two transport bars 24 so that they move down to a position approaching the sheets of cloth and to the recess of the loading table 21 at the loading table 21 are aligned. The lifting unit drives the transport bars 24 so again that the transport bars 24 move down until the supports are in the recess 2101 of the loading table. Then the two transport poles 24 again driven by the folding unit to move inwards until the supports reach on the underside at both ends of the fabric sheets. The lifting unit drives the transport rod 24 start moving upward so that the supporting of the sheets of fabric is performed. At the same time is through the cover plate 27 at the end of loading the end of loading opened. The displacement unit drives the transport rods 24 so that the transport bars move in the direction close to the ejection end of the welding chamber 18 and thus the sheets of fabric onto the heating plate 30th in the welding chamber 18th be transported. The transport unit 2 carries out the transport one after the other so that the fabric sheets pass through each heating plate 30th be heated and then placed on the hot plate 30th directly under the suction module 9 are located.

The suction module lifting cylinder 35 drives the sealing plate 36 to move down so that the sealing plate 36 and the heating plate located directly below it 30th together enclose a compressed vacuum space. At the same time, the air in the negative pressure space is sucked out via the suction pipe, so that a negative pressure and even a vacuum state are maintained in the negative pressure space in order to ensure that the bubbles in the solder paste emerge and thus the welding quality is guaranteed. After welding, the suction module lift cylinder drives 35 the sealing plate 36 to move upwards.

• 3) Transporting the finished-welded fabric sheets in the vacuum chamber to the ejection end by the transport unit 2 and gradually cooling the sheets of fabric through the cooling zone.

The transport unit 2 transports the fabric sheets further to the ejection end, and afterwards the fabric sheets one after the other over each cooling plate 28 have cooled, they will be placed on the ejection table 19th moved, ie the whole process of welding the sheets of fabric is complete.

In the above description only a few preferred exemplary embodiments of the present application are shown and do not represent any restriction of the present application.

Claims (19)

Vacuum welding furnace, comprising a welding chamber (18), a furnace cover (4) and a transport unit (2), the furnace cover (4) sealingly covering the top of the welding chamber (18) so that between the welding chamber (18) and the furnace cover (4 ) a welding space is formed, and a welding table (20) is provided on the lower part of the welding chamber (18), characterized in that a side of the welding table (20) facing the loading end is a heating zone and a side of the welding table (20) facing the ejection end ( 20) is a cooling zone, a suction module (9) being provided on the upper side of an end of the heating zone facing the cooling zone, which can be raised and lowered on the furnace cover (4), the bottom part of the suction module (9) together with the heating zone encloses a tightly sealed vacuum space, and wherein a protective gas inlet pipe is provided on the welding chamber (18) or the furnace cover (4). Vacuum welding furnace after Claim 1 , characterized in that the welding table (20) comprises a plurality of heating plates (30) and a plurality of cooling plates (28), the plurality of heating plates (30) being assembled in a heating zone and the plurality of cooling plates (28) being assembled in a cooling zone. Vacuum welding furnace after Claim 2 , characterized in that each of the heating plates (30) is symmetrically provided on both sides with an electric heating tube (31) and a sensor receiving hole (3003) is provided on the middle part of the heating plate (30), which is a blind hole provided between the two electric heating tubes (31) is formed, wherein a temperature sensor (32) is installed in the sensor receiving hole (3003). Vacuum welding furnace after Claim 2 , characterized in that each of the cooling plates (28) is symmetrically provided with an inflow channel (2802) on both sides and an outflow channel (2803) connected to the two water inlet channels (2802) is provided at least at one end of the cooling plate (28). Vacuum welding furnace after Claim 1 , characterized in that a liquid collection hood (33) is provided on the underside of the welding chamber (18), the bottom part of the liquid collection hood (33) being designed on both sides in such a way that it runs gradually inclined downwards from the side to the center, and wherein a liquid collection hood drain pipe (3301) is provided at the bottom portion of the liquid collection hood (33). Vacuum welding furnace after Claim 1 , characterized in that the protective gas inlet pipe is a main feed line for nitrogen (5) which is provided at both ends of the furnace cover (4), the middle part of the furnace cover (4) being symmetrically provided on both sides with a secondary feed line for nitrogen (16) which is connected to the interior of the welding chamber (18). Vacuum welding furnace after Claim 6 , characterized in that an inlet plate (17) is arranged symmetrically on both sides on the lower part of the furnace cover (4), an inlet plate (17) open on the upper side on the upper part of the inlet plate (17) Inlet opening (1701) is provided and, together with the furnace cover (4), encloses an inlet space, and wherein a plurality of air injection holes (1702) are spaced apart on the inlet plate (17) and connect the inlet openings (1701) to the interior of the welding chamber (18) , while the secondary supply line for nitrogen (16) is connected to the inlet opening (1701). Vacuum welding furnace after Claim 1 , characterized in that the transport unit (2) comprises transport rods (24) and three units provided on the underside of the welding chamber (18), ie a lifting unit, a displacement unit and a folding unit, there being two symmetrically arranged transport rods (24) and the middle part of the transport rods (24) is located inside the welding chamber (18), and the folding unit, which is also connected to the two transport rods (24) and drives them to fold in and out, is connected to and from the displacement unit is driven to move in the direction close to the ejection end or away from the ejection end, while the lifting unit is connected to the displacement unit and driving them to raise and lower, and each transport bar (24) is provided with a plurality of supports is, while a plurality of recesses are provided at both ends of the welding table (20), the recesses with the support tongues correspond in pairs. Vacuum welding furnace after Claim 8 , characterized in that both ends of the welding chamber (18) are each closed by end caps (26) and each end cap (26) is symmetrically provided on both sides with a recess for transport (2601), the transport rods (24) through the recess for transport (1601) are connected through to the folding unit, and wherein the bottom part of the end cap (26) is arranged at a distance from the welding table (20). Vacuum welding furnace after Claim 8 , characterized in that on the underside of the welding chamber (18) with the transport rods (24) in pairs corresponding assembly arms for transport (45) are provided, both ends of each of the assembly arms for transport (45) with the two ends of the associated transport rod (24 ) are connected, and the folding unit is connected to the two mounting arms for transport (45). Vacuum welding furnace after Claim 8 , characterized in that the folding unit comprises a horizontally arranged folding guide plate (43) and a folding force module, the folding guide plate (43) being provided between the two transport rods (24) and on both sides with a folding guide gradually inclined inwards in the direction facing the ejection end is provided that on the underside of each transport rod (24) in each case a folding guide wheel (44) resting on the folding guide is attached and a folding spring located in the expanded state is provided between the two transport rods (24), and the folding force module with the folding guide plate (43 ) is connected and drives it to move in the direction close to the ejector end or away from the ejector end. Vacuum welding furnace after Claim 8 , characterized in that the lifting unit comprises a lifting guide block (48) and a lifting cylinder for transport (46), wherein a lifting guide is arranged on the upper side of the lifting guide block (48) which is gradually inclined downward in the direction facing the ejection end, wherein on the On the underside of the displacement unit there is a lifting guide wheel resting against the lifting guide, and a piston rod of the lifting cylinder for transport (46) is connected to the lifting guide block (48) and drives it to move in the direction close to the ejection end or away from the ejection end. Vacuum welding furnace after Claim 9 , characterized in that each of the end caps (26) is symmetrically provided at both ends with a mounting groove (2602) for the cover plate, the plane in which the mounting groove (2602) for the cover plate is located perpendicular to the center line of the support rods (24) runs, wherein a cover plate (27) is slidably mounted in the mounting groove (2602) for the cover plate, the cover plate (27) and the transport rod (24) being connected to one another in a sliding and sealing manner, and the interaction of the cover plate (27) and the end cap (26) on the corresponding side the end of the welding chamber (18) are sealed. Vacuum welding furnace after Claim 9 , characterized in that on the underside of the welding chamber (18) with the transport rods (24) in pairs corresponding assembly arms for transport (45) are provided, both ends of each of the assembly arms for transport (45) with the two ends of the associated transport rod (24 ) are connected, and the folding unit is connected to the two mounting arms for transport (45). Vacuum welding furnace after Claim 1 , characterized in that the suction module (9) comprises a sealing plate (36) and a suction module lifting cylinder (35), the sealing plate (36) being arranged on the top of the heating zone and parallel to the heating zone, and the bottom part of the sealing plate (36) together with the heating zone includes closed negative pressure space, which is connected to a suction pipe. Vacuum welding furnace after Claim 15 , characterized in that the sealing plate (36) is arranged on the underside of the furnace cover (4) and the suction module lifting cylinder (35) is attached to the top of the furnace cover (4), the piston rod of the suction module lifting cylinder (35) via a connecting tube (37 ) is connected to the sealing plate (36), and wherein the connecting pipe (37) connects the vacuum space with the suction pipe. Vacuum welding furnace after Claim 1 characterized by further comprising a cleaning module (59), wherein the inlet end and the outlet end of the cleaning module (59) are each connected to the interior of the welding chamber (18). Vacuum welding furnace after Claim 17 , characterized in that the cleaning module (59) has a cleaning box (61) on both sides of which the inlet end and the outlet end are arranged, a corrugated tube (67) which is arranged in the cleaning box (61) and is filled with circulating cooling liquid, and a screen (64) provided in the vicinity of the outlet end and closing the outlet end, wherein a fan (65) is provided between the outlet end of the cleaning box (61) and the welding chamber (18). Vacuum welding furnace after Claim 18 , characterized in that the cleaning module (59) further comprises ribs (68) arranged in the cleaning box (61).

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