CN110125512B - Online negative pressure welding furnace - Google Patents
Online negative pressure welding furnace Download PDFInfo
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- CN110125512B CN110125512B CN201811351857.2A CN201811351857A CN110125512B CN 110125512 B CN110125512 B CN 110125512B CN 201811351857 A CN201811351857 A CN 201811351857A CN 110125512 B CN110125512 B CN 110125512B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/04—Heating appliances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/085—Cooling, heat sink or heat shielding means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D1/00—Devices using naturally cold air or cold water
- F25D1/02—Devices using naturally cold air or cold water using naturally cold water, e.g. household tap water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses an online negative pressure welding furnace, which comprises an upper box body and a lower welding box body positioned at the lower part of the upper box body, wherein the lower welding box body further comprises a lower box body, a transmission unit fixed on the lower box body, a lower heating unit fixed in the lower box body, a negative pressure welding unit installed at the rear end of the lower heating unit and used for welding in a negative pressure environment, a feeding unit positioned at one side of the lower box body and used for feeding and transmitting a workpiece, and a discharging unit positioned at the other side of the lower box body and used for discharging and transmitting the workpiece, and the transmission unit comprises a transmission flat steel belt or a single-core steel wire which performs lifting motion or circulating motion and is convenient for negative pressure sealing. According to the welding furnace, the negative pressure environment cavity is built only in the heating area corresponding to the welding process curve, the required negative pressure environment can be obtained quickly, the cost is reduced relative to the equipment of the whole negative pressure cavity, and meanwhile, the workpiece of the welding furnace is conveyed by adopting a flat steel belt or a single-core steel wire, so that the welding furnace is convenient to seal. The method has the advantages of low economic cost, low working energy consumption, high production efficiency, high automation degree and high integration level.
Description
Technical Field
The invention relates to a welding furnace, in particular to an online negative pressure welding furnace which has the advantages of low economic cost, low working energy consumption, high production efficiency and high automation degree.
Background
At present, welding equipment is divided into three types from the welding environment, namely, conventional welding equipment, namely, welding in an air environment in a normal pressure state; secondly, inert atmosphere welding equipment, such as nitrogen welding equipment, namely welding under nitrogen atmosphere, effectively solves the oxidation defect in the conventional welding; thirdly, the negative pressure welding equipment and welding in a negative pressure environment are combined with inert gas atmosphere or reducing gas, so that oxidation defects and cavitation phenomena are effectively avoided, and welding quality is higher. Welding equipment is divided into two types from the viewpoint of equipment automation: firstly, off-line equipment is not in butt joint with other equipment, and is manually fed and discharged, so that the welding efficiency is low; secondly, on-line equipment is in butt joint with upstream equipment and downstream equipment, automatic feeding and automatic discharging are achieved, the automation degree is high, and the welding efficiency is high. The temperature zone set for ensuring the process curve can be divided into a multi-temperature zone device and a single-temperature zone device, and the welding process curve requires preheating, welding, cooling and other processes. The multiple temperature areas complete each process curve in different temperature areas, and compared with single temperature area equipment, the efficiency is higher.
Existing on-line cyclic transmissions include conventional reflow ovens and multi-stage transmission structures, but suffer from the following disadvantages: firstly, a conventional reflow oven uses one-section type true transmission, the transmission is mainly in the form of a mesh belt, a steel wire, a chain and the like, and the transmission form cannot be directly used for negative pressure sealing, so that the conventional reflow oven is mainly used for channel type reflow soldering; secondly, the multistage transmission structure divides the whole equipment transmission into a plurality of sections, each transmission section is independently or in association with control, a certain transmission section is arranged in the negative pressure cavity, and online negative pressure welding can be realized, but the transmission multistage control consistency is poor, the cost is high, the maintenance is inconvenient, the negative pressure welding cavity transmission inlet and outlet are controlled by the negative pressure multipurpose vacuum gate valve, and the equipment cost is high.
Chinese patent 201420064773.1 discloses a full-automatic vacuum cavity wafer processing apparatus, which is used for wafer processing and is provided with: constant pressure cavity unit, pan feeding unit, ejection of compact unit and control element. The constant pressure cavity unit is internally provided with a constant vacuum pressure cavity, and the cavity is connected with: the feeding cavity of the feeding unit and the discharging cavity of the discharging unit. The feeding cavity and the discharging cavity are used for matching with the rapid vacuum pumping and isobaric conveying of the cavity when the cavity inputs and outputs wafers. However, this device has the following disadvantages: firstly, three parts of the whole equipment are respectively arranged in three vacuum cavities, and the processing cost of the vacuum cavities is high; secondly, the vacuum cavity is large, and the sealing difficulty of the interfaces is increased; thirdly, the equipment purchase cost is high and the equipment maintenance cost is high by two vacuum pumps of the three vacuum cavities, and the equipment is uneconomical from the aspect of economy cost; fourthly, the problem of welding cavities is mainly solved by negative pressure, only the welding is performed under the process curve of a welding fusion zone, and the negative pressure environment can be omitted under the rest curves; fifth, the equipment negative pressure cavity is bigger, the negative pressure obtaining time is longer, the energy consumption is high, and the production efficiency is low. Therefore, the online negative pressure welding furnace with low economical cost, low working energy consumption, high production efficiency and high automation degree is urgently needed.
Disclosure of Invention
In view of the above, the invention provides an online negative pressure welding furnace with low economical cost, low working energy consumption, high production efficiency, high automation degree and higher integration level.
The invention solves the problems by the following technical means:
the on-line negative pressure welding furnace comprises an upper box body and a lower welding box body positioned at the lower part of the upper box body, wherein the lower welding box body comprises a lower box body, a transmission unit fixed on the lower box body, a lower heating unit fixed in the lower box body, a negative pressure welding unit installed at the rear end of the lower heating unit and used for negative pressure environment welding, a feeding unit positioned at one side of the lower box body and used for feeding and transmitting workpieces, and a discharging unit positioned at the other side of the lower box body and used for discharging and transmitting the workpieces; wherein: the welding furnace is provided with a negative pressure cavity only in a heating area corresponding to a welding process curve, and the transmission unit comprises a transmission flat steel belt or a single-core steel wire which does lifting motion or circulating motion and is convenient for negative pressure sealing.
Further, the lower heating unit includes: the lower heating inner container is used for fixing the heating plate, the negative pressure cavity and the cooling plate and is arranged in the lower box body; the lower box heating plate is used for preheating the workpiece and setting the temperature according to a process curve, and is arranged in the lower heating liner; the negative pressure welding unit includes: the upper cavity bracket and the moving unit are fixed on the lower heating liner; the negative pressure upper cavity is arranged on the upper cavity bracket and the moving unit, and the negative pressure upper cavity is driven to move up and down by the movement of the negative pressure upper cavity; the upper negative pressure heating plate is arranged in the negative pressure upper cavity and is used for heating at a negative pressure; the high-temperature negative pressure sealing ring is used for negative pressure sealing and is fixed on the lower edge of the negative pressure upper cavity; the lower negative pressure heating plate is used for negative pressure heating welding and is arranged in the negative pressure lower cavity; the negative pressure lower cavity is arranged at the rear end of the lower heating liner.
Further, the transmission unit includes: the transmission power module can perform lifting and left-right movement and is fixed on the lower box body; the transmission frame is fixed on the transmission power module and can drive the transmission power module to realize lifting and left-right movement through the movement of the transmission power module; and the two ends of the transmission flat steel belt or the single-core steel wire are respectively fixed at the two ends of the transmission frame.
Further, the transmission unit includes: the device comprises a transmission power system for power transmission, a driving shaft seat, a driving shaft, a driving wheel, a mounting support piece, a mounting shaft, a supporting seat and a rotatable driven wheel, wherein the transmission power system is arranged on a bottom plate and used for power transmission, the driving shaft seat is arranged on the bottom plate and used for driving the driving shaft to be installed, the driving shaft is fixed on the driving shaft seat and used for driving the driving shaft to rotate through the transmission power system, the driving wheel is fixed on the driving shaft and used for driving a flat steel belt or a single-core steel wire to circularly move, the mounting support piece is fixed on the bottom plate, the mounting shaft is fixed on the mounting support piece and used for fixing the supporting seat, the supporting seat is fixed on the mounting shaft and can slide on the mounting shaft and used for adjusting the distance between the flat steel belt or the single-core steel wire.
Further, the cooling unit is arranged in the lower heating inner container and adjacent to the negative pressure welding unit, and comprises a cooling unit inner container fixed in the lower box body and a cooling plate arranged in the cooling unit inner container and internally provided with a cooling liquid pipeline.
Further, the negative pressure welding unit further comprises a negative pressure obtaining port for connecting the vacuum pump and the vacuum gauge and a vacuum electrode mounting interface for mounting the vacuum electrode, wherein the negative pressure obtaining port is arranged at the rear part of the negative pressure cavity, and the vacuum electrode mounting interface is arranged at the rear part of the lower negative pressure cavity and leads out a power supply of a heating plate in the negative pressure cavity to the outside of the negative pressure cavity.
Further, a flux recovery port for recovering the flux is provided at the lower portion of the lower heating liner.
Further, a transmission flat steel belt or a single-core steel wire clearance groove is formed in the upper surface of the lower box heating plate, and the transmission flat steel belt or the single-core steel wire is positioned in the clearance groove when the transmission flat steel belt or the single-core steel wire is at a low point.
Further, a heating plate corresponding to the lower box heating plate and a nitrogen port for providing a nitrogen environment for the welding furnace to work are arranged on the upper box.
Further, a transmission flat steel belt or a single-core steel wire clearance groove is formed in the upper surface of the lower negative pressure heating plate, and the transmission flat steel belt or the single-core steel wire is positioned in the clearance groove when the transmission flat steel belt or the single-core steel wire is at a low point.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the welding furnace disclosed by the invention is only provided with the negative pressure environment cavity in the heating area corresponding to the welding process curve, is simple in structure, can quickly obtain the required negative pressure environment, and can maximally reduce the purchase cost of negative pressure equipment on the premise of meeting the functions compared with the equipment of the whole negative pressure cavity, and meanwhile, the production efficiency is maximally improved. The negative pressure cavity is smaller, the places needing sealing are fewer, the maintenance is easier, and the maintenance cost is reduced. The workpiece of the welding furnace is transmitted by adopting a flat steel belt or a single-core steel wire, so that the welding furnace is convenient to seal. The device integrates the functions of automatic feeding, transmission, nitrogen filling, welding, scaling powder recovery, cooling, automatic material collection and the like, and has higher integration level. The invention realizes one-section transmission, has simple structure, easy control and better transmission consistency; the one-section transmission has no intermediate transition connection, so that the space is saved; the invention reduces or eliminates the use of the vacuum gate valve and reduces the cost.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the following description will briefly explain the drawings of the embodiments, and it will be apparent to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
FIG. 1 is a perspective view of the general assembly of the present invention;
FIG. 2 is a perspective view of a lower weld box of the present invention;
FIG. 3 is a longitudinal cross-sectional view of FIG. 2 of the present invention;
FIG. 4 is a perspective view of the present invention in an initial state;
FIG. 5 is a schematic view of the present invention in a feed completion state;
FIG. 6 is a schematic illustration of the present invention in a first feed transfer state;
FIG. 7 is a schematic illustration of the present invention in a second feed transfer state;
FIG. 8 is a schematic view of the present invention in a third feed transfer state;
FIG. 9 is a schematic view of the present invention in a fourth feed transfer state;
FIG. 10 is a schematic view of an on-line operation of the present invention;
FIG. 11 is a schematic diagram of the overall assembly of embodiment 2 of the present invention;
fig. 12 is a perspective view of a lower welded box according to embodiment 2 of the present invention;
fig. 13 is a longitudinal sectional view of fig. 11 of embodiment 2 of the present invention;
fig. 14 is a schematic operation diagram of embodiment 2 of the present invention.
Reference numerals illustrate:
GJ. A workpiece; 00. an online negative pressure welding furnace; 1. an upper case; 2. a lower welding box body; 21. a lower box body; 22. a transmission unit; 220. a transmission power system; 221. A bottom plate; 222 flat steel strip; 223 driven wheel; 224 a fixed support; 225. mounting and supporting; 226. a mounting shaft; 227. a driving shaft seat; 228. a driving wheel; 229. a driving shaft; 23. a lower heating unit; 231. a lower heating liner; 232. a lower box heating plate; 233. a negative pressure welding unit; 2331. a negative pressure upper cavity; 2332. a negative pressure heating plate is arranged on the upper part; 2333. a high-temperature negative pressure sealing ring; 2334. a lower negative pressure heating plate; 2335. the cavity is pressed down under negative pressure; 2336. a moving unit of the upper cavity bracket machine; 2337. a negative pressure obtaining port; 2338. a vacuum electrode mounting interface; 234. a cooling unit; 2341. a cooling unit liner; 2342. a cooling plate; 24. a feeding unit; 241. a feed roll; 25. a discharging unit; 251. a discharging roller; 26. and a flux recovery port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
Fig. 1 to 10 show a device configuration according to a first embodiment of the present invention.
As shown in fig. 1-10, an online negative pressure welding furnace comprises an upper box body 1 and a lower welding box body 2, wherein a heating plate corresponding to a lower box body heating plate 232 and a nitrogen port for providing a nitrogen environment for the welding furnace to work are arranged on the upper box body 1, and the lower welding box body 2 is positioned at the lower part of the upper box body 1.
The lower welding box body 2 further comprises a lower box body 21, a transmission unit 22 fixed on the lower box body, a lower heating unit 23 fixed in the lower box body, a negative pressure welding unit 233 installed at the rear end of the lower heating unit and used for welding in a negative pressure environment, a feeding unit 24 positioned at one side of the lower box body and used for feeding and transmitting workpieces, a discharging unit 25 positioned at the other side of the lower box body and used for discharging and transmitting the workpieces, and a cooling unit 234 installed in a lower heating liner and adjacent to the negative pressure welding unit.
The feeding unit 24 comprises a feeding roller 241 which is rolled in one direction and drives the workpiece to move towards the inside of the welding furnace, and the discharging unit 25 comprises a discharging roller 251 which is rolled in one direction and drives the workpiece to move towards the outside of the welding furnace. The improvement point of the embodiment is mainly that the welding furnace only builds a negative pressure cavity in a heating area corresponding to a welding process curve, and the workpiece of the welding furnace is transmitted by adopting a flat steel belt or a single-core steel wire, so that the welding furnace is convenient to seal.
In the above embodiment, the transmission unit 22 specifically includes:
a transmission power module 223 fixed to the lower case 21, which can be lifted and moved left and right;
a transmission frame 221, wherein the transmission frame 221 is fixed on the transmission power module 223 and can be driven to move up and down and left and right by the movement of the transmission power module 223;
and a transmission flat steel strip or single-core steel wire 222, both ends of which are respectively fixed to both ends of the transmission frame 221, which moves in synchronization with the transmission frame and enables workpiece transmission. The workpiece transmission of the welding furnace adopts flat steel belts or single-core steel wires for transmission, and has the significance of convenient sealing.
In the above embodiment, the lower heating unit 23 specifically includes:
a lower heating inner container 231 installed inside the lower case for fixing a heating plate, a negative pressure chamber and a cooling plate, and a flux recovery port 26 for recovering flux is provided at a lower portion of the lower heating inner container 231;
the lower box heating plate 232, the lower box heating plate 232 install in inside the lower heating inner bag 231 for the work piece preheats and sets up the temperature according to the technology curve lower box heating plate upper surface is provided with and transmits flat steel band or single core steel wire and keeps away the position inslot, when transmission flat steel band or single core steel wire are in the low point.
In the above embodiment, the negative pressure welding unit 233 specifically includes:
an upper cavity bracket and movement unit 2336 fixed on the lower heating liner 231;
the negative pressure upper cavity 2331 is arranged on the upper cavity bracket and the motion unit 2336, and the negative pressure upper cavity 2331 is driven to move up and down by the motion of the negative pressure upper cavity; the negative pressure cavity is smaller, the places needing sealing are fewer, the maintenance is easier, and the maintenance cost is reduced;
an upper negative pressure heating plate 2332, which is installed in the negative pressure upper cavity 2331 and is used for negative pressure heating;
the high-temperature negative pressure sealing ring 2333 is fixed on the lower edge of the negative pressure upper cavity 2331 and is used for negative pressure sealing;
the lower negative pressure heating plate 2334 is arranged in the negative pressure lower cavity 2335 and is used for negative pressure heating welding; a transmission flat steel belt or single-core steel wire clearance groove is formed in the upper surface of the lower negative pressure heating plate 2334, and the transmission flat steel belt or single-core steel wire 222 is positioned in the clearance groove when being at a low point;
the negative pressure lower cavity 2335 is arranged at the rear end of the lower heating liner, and a 1mm gap is reserved between the negative pressure lower cavity and the upper edge of the negative pressure lower cavity when the transmission flat steel belt or the single-core steel wire descends to the lowest point;
a negative pressure obtaining port 2337, which is arranged at the rear part of the negative pressure lower cavity 2335 and is used for connecting a vacuum pump and a vacuum gauge;
and a vacuum electrode mounting interface 2338, which is arranged at the rear part of the lower negative pressure lower cavity 2335 and is used for leading out a power supply of the heating plate in the negative pressure cavity to the outside of the negative pressure cavity for mounting the vacuum electrode.
The welding furnace disclosed by the invention is only provided with the negative pressure environment cavity in the heating area corresponding to the welding process curve, is simple in structure, can quickly obtain the required negative pressure environment, and can maximally reduce the purchase cost of negative pressure equipment on the premise of meeting the functions compared with the equipment of the whole negative pressure cavity, and meanwhile, the production efficiency is maximally improved.
In the above embodiment, the cooling unit 234 includes a cooling unit liner 2341 fixed in the lower case, and a cooling plate 2342 installed in the cooling unit liner and having a coolant pipe therein.
Fig. 6-9 show schematic views of the present invention in various feed delivery states.
Fig. 6 is a schematic diagram of the present invention in a first feeding state, where the negative pressure welding unit releases negative pressure, the upper cavity support and the moving unit operate to drive the negative pressure upper cavity to rise to a high point, the workpiece starts to be transported, the transmission power module operates to drive the rising module to drive the transmission frame and the transmission flat steel belt or the single-core steel wire to rise, the transmission flat steel belt or the single-core steel wire drives the workpiece to rise, and the transmission unit moves rightwards and to the rightmost end.
Fig. 7 is a schematic view of the present invention in a second feed transfer state, as shown, with the workpiece transferred directly over the heated plate.
Fig. 8 is a schematic diagram of the present invention in a third feeding state, where the transmission power module works to drive the descent module to drive the transmission frame and the flat steel strip or the single-core steel wire to descend, and the flat steel strip or the single-core steel wire to drive the workpiece to descend, and the workpiece contacts with the upper surface of the heating plate or the cooling plate, and the flat steel strip or the single-core steel wire is separated from the workpiece until the flat steel strip or the single-core steel wire moves to the lower end, and at this time, the flat steel strip or the single-core steel wire is in the groove of the heating plate.
Fig. 9 is a schematic view of the present invention in a fourth feed transfer state, with the transfer unit moving to the left, as shown, to the far left. Simultaneously, the upper cavity support and the motion unit work to drive the negative pressure upper cavity to descend to a low point, the sealing ring at the lower edge of the negative pressure upper cavity is contacted with the negative pressure lower cavity to achieve a sealing effect, at the moment, two parts of operation are performed, the first part of operation is used for pumping negative pressure, the second front end of the operation is used for feeding, and the rear end of the operation is used for discharging. It is also understood as the initial position of the next feed. I.e. back to the position of fig. 4.
As a further improvement of the above technical solution, the negative pressure upper cavity 2331 in this embodiment is a movable cavity, and can be lifted vertically, or can be lifted upwards by hinging.
As a further improvement of the above technical solution, the negative pressure upper cavity 2331 in this embodiment is a movable cavity, and may also be designed as a fixed cavity, where the front and rear openings of the cavity are sealed by a valve plate.
The device integrates the functions of automatic feeding, transmission, nitrogen charging, welding, scaling powder recovery, cooling, automatic material collection and the like, and has higher integration level.
Example 2
It is worth noting that as a further improvement of the above technical solution, the flat steel strip or the single-core steel wire of the present invention can also not perform lifting movement during the working process, only perform cyclic transmission, and the negative pressure form is not changed.
Fig. 11-13 show a schematic structural view of a second embodiment of the present invention.
As shown in the figure, the structural features of this embodiment are:
the circulating transmission feeding unit is fixed in the lower box body and used for workpiece transmission. The transmission power system 220 is installed on the bottom plate 221 and is used for power transmission, and in the embodiment, a motor is adopted to drive the driving shaft 229 to rotate through belt transmission, so that the driving wheel 228 is driven to rotate, and the circulating motion of the flat steel belt or the single-core steel wire 222 is realized; the motor can also be directly connected with the driving shaft. The driven wheel 223 is fixed on the upper and lower ends of the supporting seat 224 through bearings respectively and can rotate freely; as a support wheel for the flat steel belt or single core wire 222 drive. The supporting seat 224 is fixed on the installation shaft 226 and can slide on the installation shaft 226 again for adjusting the interval of the flat steel belt or the single-core steel wire 222, and the adjusted supporting seat is locked on the installation shaft 226. The mounting support 225 is fixed on the bottom plate 271, is connected with the mounting shaft 226 through a middle mounting hole, is provided with grooves at two ends, is provided with bearing cavities on the side walls of the grooves, and is used for bearing fixation and is connected with the driven wheel 223 through a bearing. The mounting shaft 226 is fixed to the mounting support 225 for fixing the support base 224, and the fixing base 224 is movable in the axial direction of the mounting shaft for pitch adjustment of the flat steel strip or the single-core steel wire 222. The driving shaft seat 227 is fixed on the bottom plate 221 through a bottom mounting hole, a bearing cavity is arranged on the upper side edge and used for mounting a bearing, and the driving shaft 229 is connected with the driving shaft seat 227 through the bearing and can freely rotate. The driving shaft 229 is fixed on the driving wheel 228, and can axially move on the driving shaft 228, so that the driving shaft is used for adjusting the space between the flat steel belts or the single-core steel wires 222, and the driving wheel is locked on the driving wheel after the space between the flat steel belts or the single-core steel wires 222 is adjusted; the capstan 228 drives the flat steel strip or single core wire 222 in a circular motion during operation. The driving shaft 228 is fixed on the driving shaft seat 227 through bearings at two ends, and is driven to rotate by the transmission power system 220.
The rest of the structure of this embodiment is the same as that of embodiment 1.
The working procedure of this embodiment is as follows:
in the initial state of the equipment, each heating plate of the equipment works, the cooling plate works, the transmission power system works, the negative pressure welding unit releases negative pressure, the upper cavity bracket and the motion unit work to drive the negative pressure upper cavity to rise to a high point, the workpiece starts to be transmitted, the upper computer or the feeding system feeds, the workpiece is counted into the preset position of the inlet of the equipment, the steps of each motion of the flat steel belt or the single-core steel wire are consistent, and the steps are two heating area intervals; the transmission power system stops working at a step distance, the upper cavity support and the movement unit work to drive the negative pressure upper cavity to descend to a low point, the negative pressure upper cavity is sealed with the negative pressure lower cavity through the sealing ring, the negative pressure is pumped, the workpieces start to be welded, the welding is completed, the negative pressure welding unit releases negative pressure, the upper cavity support and the movement unit work to drive the negative pressure upper cavity to ascend to a high point, the workpieces are transmitted at a step distance, the next workpiece enters the upper part of the negative pressure heating plate below the inside of the negative pressure welding unit, the transmission power system and the like are carried out once.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (5)
1. An online negative pressure welding furnace which is characterized in that: the welding device comprises an upper box body and a lower welding box body positioned at the lower part of the upper box body, wherein the lower welding box body comprises a lower box body, a transmission unit fixed on the lower box body, a lower heating unit fixed in the lower box body, a negative pressure welding unit arranged at the rear end of the lower heating unit and used for welding in a negative pressure environment, a feeding unit positioned at one side of the lower box body and used for feeding and transmitting workpieces, and a discharging unit positioned at the other side of the lower box body and used for discharging and transmitting the workpieces, and the feeding unit and the discharging unit are both arranged on the lower box body; wherein:
the lower heating unit includes: the lower heating inner container is used for fixing the heating plate, the negative pressure cavity and the cooling plate and is arranged in the lower box body; the lower box heating plate is used for preheating the workpiece and setting the temperature according to a process curve, and is arranged in the lower heating liner;
the negative pressure welding unit includes: the upper cavity bracket and the moving unit are fixed on the lower heating liner; the negative pressure upper cavity is arranged on the upper cavity bracket and the moving unit, and the negative pressure upper cavity is driven to move up and down by the movement of the negative pressure upper cavity; the upper negative pressure heating plate is arranged in the negative pressure upper cavity and is used for heating at a negative pressure; the negative pressure lower cavity is arranged at the rear end of the lower heating liner; the lower negative pressure heating plate is used for negative pressure heating welding and is arranged in the negative pressure lower cavity; the high-temperature negative pressure sealing ring is used for being matched with the negative pressure lower cavity to realize negative pressure sealing, and the high-temperature negative pressure sealing ring is fixed on the lower edge of the negative pressure upper cavity;
the welding furnace builds a negative pressure cavity only in a heating area corresponding to a welding process curve, and the transmission unit comprises a transmission flat steel belt or a single-core steel wire which does lifting motion or circulating motion and is convenient for negative pressure sealing;
when the device works, the flat steel belt or the single-core steel wire is transmitted to drive the workpiece to ascend, the transmission unit moves rightwards to the rightmost end, the workpiece is transmitted to the right above the heating plate, the flat steel belt or the single-core steel wire is transmitted to descend, the workpiece is contacted with the upper surface of the heating plate or the cooling plate, the flat steel belt or the single-core steel wire is separated from the workpiece until the flat steel belt or the single-core steel wire moves to the low end, and the transmission unit moves leftwards to the leftmost end;
the transmission unit includes: the transmission power module can perform lifting and left-right movement and is fixed on the lower box body; the transmission frame is fixed on the transmission power module and can drive the transmission power module to realize lifting and left-right movement through the movement of the transmission power module; the transmission flat steel belt or the single-core steel wire moves synchronously with the transmission frame and can realize workpiece transmission, and two ends of the transmission flat steel belt or the single-core steel wire are respectively fixed at two ends of the transmission frame;
a transmission flat steel belt or a single-core steel wire avoiding groove is formed in the upper surface of the lower box heating plate, and the transmission flat steel belt or the single-core steel wire is positioned in the avoiding groove when the transmission flat steel belt or the single-core steel wire is at a low point;
the upper box body is provided with a heating plate corresponding to the lower box body heating plate and a nitrogen port for providing a nitrogen environment for the welding furnace to work;
the upper surface of the lower negative pressure heating plate is provided with a transmission flat steel belt or a single-core steel wire clearance groove, and the transmission flat steel belt or the single-core steel wire is positioned in the clearance groove when being at a low point.
2. The in-line negative pressure welding furnace of claim 1, wherein: the transmission unit includes: the device comprises a transmission power system for power transmission, a driving shaft seat, a driving shaft, a driving wheel, a mounting support piece, a mounting shaft, a supporting seat and a rotatable driven wheel, wherein the transmission power system is arranged on a bottom plate and used for power transmission, the driving shaft seat is arranged on the bottom plate and used for driving the driving shaft to be installed, the driving shaft is fixed on the driving shaft seat and used for driving the driving shaft to rotate through the transmission power system, the driving wheel is fixed on the driving shaft and used for driving a flat steel belt or a single-core steel wire to circularly move, the mounting support piece is fixed on the bottom plate, the mounting shaft is fixed on the mounting support piece and used for fixing the supporting seat, the supporting seat is fixed on the mounting shaft and can slide on the mounting shaft and used for adjusting the distance between the flat steel belt or the single-core steel wire.
3. The in-line negative pressure welding furnace according to claim 1 or 2, characterized in that: the cooling unit comprises a cooling unit inner container fixed in the lower box body and a cooling plate arranged in the cooling unit inner container and internally provided with a cooling liquid pipeline.
4. An in-line negative pressure welding furnace according to claim 3, characterized in that: the negative pressure welding unit further comprises a negative pressure obtaining port used for connecting the vacuum pump and the vacuum gauge and a vacuum electrode installation interface used for installing a vacuum electrode, wherein the negative pressure obtaining port is arranged at the rear part of the negative pressure cavity, and the vacuum electrode installation interface is arranged at the rear part of the negative pressure cavity and is used for leading out a heating plate power supply in the negative pressure cavity to the outside of the negative pressure cavity.
5. The in-line negative pressure welding furnace of claim 4, wherein: and a soldering flux recovery port for recovering soldering flux is arranged at the lower part of the lower heating liner.
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| CN111570998A (en) * | 2020-06-09 | 2020-08-25 | 深圳市劲拓自动化设备股份有限公司 | Vacuum welding equipment for circuit board |
| CN113245654B (en) * | 2021-06-22 | 2021-12-31 | 广东钜兴电子科技有限公司 | Automatic chip welding process and welding device |
| CN115642117B (en) * | 2022-11-04 | 2024-01-23 | 江苏新智达新能源设备有限公司 | Integrated curing oven suitable for thin small-volume semiconductor frame |
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