JP2021507813A - Welding mechanism of vacuum welding furnace - Google Patents

Abstract

A welding mechanism for a vacuum welding furnace, including a welding chamber (18) and a furnace lid (4) above the welding chamber (18), and welding between the furnace lid (4) and the welding chamber (18). A chamber is installed, a welding table (20) is provided in the lower part of the welding chamber (18), and the side close to the supply end of the welding table (20) is a heating region and is located at the discharge end of the welding table (20). The adjacent side is a cooling region, and the negative pressure suction module (9) is installed on the upper side of one end close to the cooling region of the heating region, and is mounted on the furnace lid (4) so as to be able to move up and down. A welding mechanism of a vacuum welding furnace characterized in that a closed negative pressure chamber is formed by surrounding the bottom of (9) and a heating region, and a shield gas introduction pipe is installed in the welding chamber (18) or the furnace lid (4). .. The welding mechanism of this vacuum welding furnace can quickly complete the welding of the sheet in the negative pressure chamber, and can prevent the sheet from reacting with oxygen during the heating process. [Selection diagram] Fig. 1

Description

It relates to a welding mechanism of a vacuum welding furnace belonging to the technical field of vacuum welding.

When manufacturing electronic components such as diodes, transistors, thyristors or bridges, it is necessary to solder a chip between the top sheet and the bottom sheet, a process called lamination. The specific work process of laminating is as follows. First, the solder paste is applied to the upper side of the bottom sheet, the chip is placed at a specific position on the bottom sheet, and then the top sheet to which the solder paste is applied to the lower side is stacked on the upper side of the bottom sheet, and then the welding metal is further applied. The top cover of the mold is put on the bottom plate of the welding mold, and finally, the welding mold is sent into the welding furnace for welding. Sheet welding must be done in a vacuum furnace.

The Chinese utility model patent of application number 201420820418.2 discloses a continuous vacuum welding furnace and has the following technical problems in the process of use.

(1) Only one heating region linked to the vacuum processing device is installed on the machine table, and it is necessary to heat the sheet to a constant temperature in order to melt the solder paste and exert a welding effect, and the sheet rises. Since the temperature requires a moving time, the heating time becomes long. Further, since the heating region is installed on the top cover and heats the sheet by radiation, the heat transfer efficiency is low, the heating time of the sheet is lengthened, and the welding efficiency is lowered.

(2) The temperature of the sheet after welding is too high, the cooling rate is slow, and the sheet carried out from the vacuum processing apparatus is easily oxidized. Also, the temperature of the sheet carried out of the machine table is still too high for the operator to process the sheet directly.

(3) The transmission mechanism supports the sheet at both ends of the sheet when the sheet is conveyed, but the heated sheet is soft, and when the sheet is supported at both ends, the sheet is deformed and easily detached from the transmission mechanism. Yes, the operation was unstable.

The technical problem to be solved by the present invention provides a welding mechanism of a vacuum welding furnace that solves the problems of the prior art, heats the sheet stepwise, has a high welding speed, and avoids oxidation of the sheet. That is.

The welding mechanism of a vacuum welding furnace as a technical solution used by the present invention to solve the technical problem includes a welding chamber and a furnace lid on the upper side of the welding chamber, and is between the furnace lid and the welding chamber. A welding chamber is installed in the welding chamber, a welding table is provided at the bottom of the welding chamber, the side close to the supply end of the welding table is the heating region, and the side close to the discharge end of the welding table is the cooling region. The negative pressure suction module is installed on the upper side of one end close to the cooling region of the heating region, and is mounted on the furnace lid so as to be able to move up and down, and the bottom of the negative pressure suction module and the heating region are surrounded to form a sealed negative pressure chamber. It is characterized in that a shield gas introduction pipe is installed in a welding chamber or a furnace lid.

Preferably, the welding table includes a plurality of heating plates and a plurality of cooling plates, a heating region is formed by connecting the plurality of heating plates, and a cooling region is formed by connecting the plurality of cooling plates. To.

Preferably, electric heating tubes are symmetrically installed on either side of each heating plate, a sensor mounting hole is installed in the center of the heating plate, and a sensor mounting hole is installed between the two electric heating tubes. It is a blind hole, and the temperature sensor is mounted in the sensor mounting hole.

Preferably, water supply passages are symmetrically installed on both sides of the cooling plate, and drainage passages communicating with the two water supply passages are installed at at least one end of the cooling plate.

Preferably, the liquid storage cover is installed on the lower side of the welding chamber, and both sides of the bottom of the liquid storage cover are gradually inclined downward from the side to the center, and the liquid storage cover is on the bottom of the liquid storage cover. A discharge pipe is provided.

Preferably, the shield gas introduction pipe is a main nitrogen gas introduction pipe, a main nitrogen gas introduction pipe is installed at both ends of the furnace lid, and secondary nitrogen gas introduction pipes are symmetrical on both sides of the central portion of the furnace lid. The secondary nitrogen gas introduction pipe is connected to the welding chamber.

Preferably, the intake plates are symmetrically installed on both sides of the lower portion of the furnace lid, an intake port that opens upward is provided on the upper portion of the intake plate, a surrounding intake chamber is formed with the furnace lid, and the intake plate has an intake port. A plurality of air jet holes communicating with the welding chamber are installed at intervals, and the auxiliary nitrogen gas introduction pipe is communicated with the intake port.

Preferably, the negative pressure suction module includes a sealing plate and a negative pressure suction elevating cylinder, the sealing plate being installed above the heating region and parallel to the heating region, with the bottom of the sealing plate and the heating region. Form a closed negative pressure chamber, and a negative pressure suction tube is connected to the negative pressure chamber.

Preferably, the sealing plate is installed on the lower side of the furnace lid, the negative pressure suction elevating cylinder is installed on the upper side of the furnace lid, and the piston rod of the negative pressure suction elevating cylinder is connected to the sealing plate via a connecting pipe. , The connecting pipe communicates the negative pressure chamber and the negative pressure suction pipe.

Preferably, a purification module is further included, and both the intake end and the exhaust end of the purification module communicate with the welding chamber.

Preferably, the purification module includes a purification box and a coil and a strainer installed in the purification box, the intake end and the exhaust end are installed on both sides of the purification box, respectively, and the strainer is close to the exhaust end. The exhaust end is sealed, the coil is filled with coolant, and a fan is installed between the exhaust end of the septic box and the welding chamber.

Preferably, the purification module further comprises fins installed in a purification box.

Compared with the prior art, the beneficial effects of the present invention are as follows.

1. Since the sheet can be heated in the heating region of the welding mechanism of this vacuum welding furnace, the welding of the sheet can be completed quickly in the negative pressure chamber. Since the welding chamber is filled with the shield gas, it is possible to prevent the sheet from reacting with oxygen during the heating process. Since the cooling region can cool the sheet, it is suitable not only for reducing the temperature of the sheet carried out from the welding chamber and avoiding oxidation of the sheet, but also for promptly processing the welded sheet. The sheet is in direct contact with the heating or cooling area and realizes heating and cooling by a heat conduction method, which greatly improves the heating rate compared to the heating method using radiation, and quickly raises and lowers the temperature of the sheet. Can be made to reduce energy consumption.

2. The heating region is formed by connecting a plurality of heating plates, and the cooling region is formed by connecting a plurality of cooling plates, whereby a plurality of sheets can be simultaneously accommodated in the welding chamber, and the heating region can be accommodated. Heats multiple sheets at the same time, allowing the sheets to reach the welding temperature quickly and improve the welding speed.

3. Since an electric heating tube and a temperature sensor are installed on each of the heating plates, each heating plate realizes independent temperature control. As a result, the sheet can be gradually heated in the process of transporting the sheet, the sheet is prevented from being deformed because the heating is too fast, and the solder paste is melted and flows out due to the heating too fast, resulting in a defective product. To avoid the occurrence of.

4. A water supply passage and a drainage passage are installed in each of the cooling plates to gradually lower the temperature of the sheet. Since the temperature is lowered too quickly, cracks occur in the solder paste after solidification, and the chip and the sheet It is possible to avoid poor contact and the occurrence of defective products, and to avoid deformation of the sheet.

5. The liquid storage cover can discharge the liquid aggregated and formed in the cooling region via the liquid storage cover discharge pipe.

6. Main nitrogen gas introduction pipes are provided at both ends of the furnace lid, and secondary nitrogen gas introduction pipes are provided symmetrically on both sides of the central part of the furnace lid, so that nitrogen gas is quickly filled in the welding chamber and before welding. It can be guaranteed that the preparation time for the gas will be shortened and the usability will be improved.

7. The sub-nitrogen gas introduction pipe uniformly injects nitrogen gas into the welding chamber by the intake plate, so that the air in the welding chamber can be completely discharged, and the heated sheet reacts with oxygen. To avoid.

8. Since the sealing plate and the heating region surround the negative pressure chamber to form a negative pressure chamber and the negative pressure suction elevating cylinder can be driven to raise and lower the sealing plate, the sheet can be carried into the negative pressure chamber or from the negative pressure chamber. Make it easier to carry out.

9. The negative pressure suction elevating cylinder is connected to the sealing plate via a connecting pipe and is driven to raise and lower the sealing plate, and the negative pressure suction pipe communicates with the negative pressure chamber via the connecting pipe to attach the sealing plate. And not only facilitates connection, but also facilitates negative pressure suction in the negative pressure chamber.

10. The purification module can extract the shield gas in the welding chamber and remove the flux fume in the shield gas, and the solder paste is heated to generate excess flux fume, which affects the welding of the sheet. Avoid that.

11. The coil exchanges heat with the shield gas extracted through the coolant, reduces the temperature of the shield gas, liquefies the flux, and then filters the shield gas through the strainer to strain the flux. Leave in. As a result, the flux and the shield gas are separated.

12. The fins can quickly lower the temperature of the shield gas by increasing the heat exchange area between the coolant and the shield gas, whereby the flux in the shield gas can be removed more thoroughly.

It is a perspective schematic view of a vacuum welding furnace after removing a furnace lid.

It is a partially enlarged view of the part A in FIG.

It is a mounting schematic diagram of an electric push rod.

It is a perspective view schematic diagram of a welding table.

It is a schematic view of the right side surface of a welding table.

It is a schematic plan sectional view of a heating plate.

It is a schematic plan sectional view of a cooling plate.

It is a front sectional schematic diagram of the welding chamber mounting member.

It is a front sectional schematic diagram of a mounting pin.

It is a perspective schematic view of a furnace lid.

It is a front sectional schematic diagram of the furnace lid.

It is a partially enlarged view of the part B in FIG.

It is a front sectional schematic diagram of the intake plate.

It is a front schematic diagram of a negative pressure suction module.

It is a perspective schematic diagram of a vacuum welding furnace.

It is a perspective schematic diagram which shows the transport mechanism.

It is a front schematic diagram of a transport mechanism.

It is a perspective schematic diagram of a flux purification module.

It is a front sectional schematic diagram of a purification module.

1: Rack, 2: Conveyance mechanism, 3: Furnace lid cylinder, 4: Furnace lid, 5: Main nitrogen gas introduction pipe, 6: Guide cover, 7: Purification introduction pipe, 8: Purification exhaust pipe, 9: Negative pressure suction Module, 10: Connection arm, 11: Swing arm, 12: Mounting arm, 13: Connection rod, 14: Furnace lid mounting plate, 1401: Mounting port, 15: Gas cover, 16: Secondary nitrogen gas introduction pipe, 17: Intake Plate, 1701: Intake port, 1702: Vase hole, 18: Welding chamber, 19: Discharge stand, 1901: Discharge stand evacuation port, 20: Welding table, 21: Supply stand, 2101: Supply stand evacuation port, 22: Mounting plate , 23: Adjustable spring, 24: Conveying bar, 25: Sealing cover, 26: End cover, 2601: Conveying port, 2602: Baffle plate mounting groove, 27: Baffle plate, 28: Cooling plate, 2801: Cooling plate evacuation port, 2802: Water supply passage, 2803: Drainage passage, 2804: Cooling plate mounting hole, 29: Water supply pipe, 30: Heating plate, 3001: Heating plate evacuation port, 3002: Electric heating pipe mounting hole, 3003: Sensor mounting hole, 3004: Heating plate mounting hole, 31: Electric heating pipe, 32: Temperature sensor, 33: Liquid storage cover, 3301: Liquid storage cover discharge pipe, 34: Negative pressure suction mounting frame, 35: Negative pressure suction lifting cylinder, 36: Sealing plate , 37: Connecting pipe, 38: Connecting plate, 39: Mounting pin, 3901: Screw hole, 40: Welding chamber mounting member, 4001: Fixed part, 4002: Stepped hole, 41: Translation plate, 42: Open / close mounting rod, 43: Open / close guide plate, 44: Open / close guide wheel, 45: Transport mounting arm, 46: Transport lift cylinder, 47: Lift guide frame, 48: Lift guide block, 49: Translation frame, 50: Translation frame guide rail, 51: Translation plate guide rail, 52: Transfer mounting plate, 53: Translation motor, 54: Translation motor mounting frame, 55: Transfer movement frame, 56: Open / close movement frame, 57: Open / close motor mounting frame, 58: Open / close motor, 59: Purification Module, 60: Refueling box, 61: Purification box, 62: Purification box introduction pipe, 63: Strainer mounting box, 64: Strainer, 65: Fan, 66: Flux recovery barrel, 67: Coil, 68: Fin, 69: Electric Push rod

1 to 19 are optimal examples of the present invention, and the present invention will be further described below with reference to FIGS. 1 to 19.

In the welding mechanism of a vacuum welding furnace, a welding chamber 18 and a furnace lid 4 are included above the welding chamber 18, a welding chamber is installed between the furnace lid 4 and the welding chamber 18, and a welding table 20 is provided below the welding chamber 18. The side close to the supply end of the welding table 20 is the heating region, the side close to the discharge end of the welding table 20 is the cooling region, and the negative pressure suction module 9 is in the cooling region of the heating region. It is installed on the upper side of one end close to each other, and is vertically attached to the furnace lid 4, forming a closed negative pressure chamber surrounded by the bottom of the negative pressure suction module 9 and the heating region, and shielded in the welding chamber 18 or the furnace lid 4. It is characterized in that a gas introduction pipe is installed. Since the heating region of the welding mechanism of the vacuum welding furnace can heat the sheet, welding of the sheet can be completed quickly in the negative pressure chamber. Since the welding chamber 18 is filled with the shield gas, it is possible to prevent the sheet from reacting with oxygen during the heating process. Since the cooling region can cool the sheet, it is suitable not only for reducing the temperature of the sheet carried out from the welding chamber 18 and avoiding oxidation of the sheet, but also for processing the welded sheet immediately. The sheet is in direct contact with the heating or cooling area and realizes heating and cooling by a heat conduction method, which greatly improves the heating rate compared to the heating method using radiation, and quickly raises and lowers the temperature of the sheet. Can be made to reduce energy consumption.

Hereinafter, the present invention will be further described with reference to specific examples, but those skilled in the art will appreciate the detailed description according to the drawings here, and the structure of the present invention must be. It is understood that beyond the scope of these limited embodiments, some equivalent alternative or general means are omitted herein by reference but still fall within the scope of the invention. Should.

Example 1

As shown in FIGS. 1 and 2, the transport mechanism 2 is provided on the lower side of the welding chamber 18, and the welding chamber 18 is provided on the upper side of the rack 1. The transport mechanism 2 includes a transport bar 24 and an elevating mechanism, a translation mechanism, and an opening / closing mechanism installed under the welding chamber 18, and the central portion of the transport bar 24 is installed in the welding chamber 18 and is installed in the welding chamber. Both ends of 18 are sealed by end covers 26, and transport ports 2601 are installed on both sides of each end cover 26, and the transport bars 24 are installed horizontally along the longitudinal direction of the welding chamber 18. Further, the two transfer bars 24 are symmetrically installed on both sides of the welding chamber 18, and both ends of each transfer bar 24 pass through the transfer port 2601 of the end cover 26 and extend. The transport mounting arm 45 is horizontally installed on the lower side of the welding chamber 18, and the transport mounting arm 45 has a one-to-one correspondence with the transport bar 24 and is installed on the lower side of the corresponding transport bar 24. Both ends of the mounting plate 22 are connected to the corresponding transport mounting arm 45 by the mounting plate 22, the upper end of the mounting plate 22 is connected to the transport bar 24, and the lower end of the mounting plate 22 is connected to the transport mounting arm 45 to move up and down. The mechanism is attached to the rack 1, the translation mechanism is attached to the elevating mechanism, the opening / closing mechanism is attached to the translation mechanism, and the opening / closing mechanism is simultaneously connected to two transport bars 24, whereby two The transfer bar 24 can be opened / closed, raised / lowered, and translated to facilitate the transfer of the sheet.

An adjusting spring 23 is installed between one end of each transport bar 24 and the mounting plate 22, the adjusting spring 23 is fitted onto the transport bar 24, and one end of the transport bar 24 close to the adjusting spring 23 is the mounting plate 22. The adjusting spring 23 is installed outside the mounting plate 22, one end of the adjusting spring 23 is supported by the mounting plate 22, and the other end is supported by the end of the transport bar 24. This makes it easier to adjust the position of the transport bar 24 in the axial direction. The adjusting spring 23 further acts as a buffer to prevent the seat from dropping due to the impact load generated during the transport process.

The lower side of the end cover 26 at both ends of the welding chamber 18 and the upper side of the welding table 20 are installed at intervals, thereby forming supply ends and discharge ends at both ends of the welding chamber 18 and close to the heating region. One end is the supply end of the welding chamber 18, and one end close to the cooling region is the discharge end of the welding chamber 18. Vertical baffle plate mounting grooves 2602 are installed at both ends of each end cover 26, and the baffle plate 27 is mounted so as to slide in the baffle plate mounting groove 2602, and the baffle plate 27 slides on the transport bar 24. A process in which the baffle plate 27 and the transfer bar 24 are connected so as to move and are installed so as to be hermetically sealed, and the baffle plate 27 seals the transfer port 2601, whereby the transfer bar 24 transfers the sheet. In, the baffle plate 27 moves together with the transport bar 24 in the plane where the end cover 26 is located, and the baffle plate 27 can always seal the transport port 2601, avoiding the leakage of nitrogen gas, and further, the transport port 2601. The restriction on the size can be lifted, and the movement locus of the transport bar 24 can be easily installed. The baffle plate 27 further seals the gap between the end cover 26 and the welding table 20, that is, the supply end or the discharge end, and the supply end or the discharge end can be opened when the transport bar 24 lifts the sheet. It is convenient for carrying the sheet into or out of the welding chamber 18, and avoids leakage of nitrogen gas. Sealing covers 25 are attached to both ends of each transport bar 24, and each transport bar 24 is connected to the baffle plate 27 by the sealing cover 25 so as to slide and seal.

As shown in FIG. 3, a plurality of holding portions installed inside the transport bar 24 are provided on the transport bars 24 on both sides of each station, and a cylinder is provided between each holding portion and the transport bar 24. Alternatively, an electric push rod 69, or a telescopic module which is an electric push rod 69 in this embodiment, is installed. The piston rod of the electric push rod 69 is connected to the support portion via the support portion mounting rod, and the support portion is extended to the vicinity of the center of the seat to stabilize the seat when it is lifted. The electric push rod 69 is installed horizontally, the support portion is attached to the lower side of the telescopic portion of the electric push rod 69, and the support portions on both sides of each station are installed toward the central portion of the station.

As shown in FIG. 4, the welding table 20 includes a plurality of heating plates 30 and a plurality of cooling plates 28, and the plurality of heating plates 30 are sequentially installed along the longitudinal direction of the welding chamber 18 to form a heating region. The plurality of cooling plates 28 are formed in order along the longitudinal direction of the welding chamber 18, forming a cooling region, and the cooling region is installed so as to be close to the discharge end. Each of the heating plate 30 and each cooling plate 28 becomes one station. The negative pressure suction module 9 is installed on the upper side of the heating plate 30 at one end close to the cooling region.

Heating plate evacuation ports 3001 are symmetrically installed on both sides of each heating plate 30, cooling plate evacuation ports 2801 are symmetrically installed at both ends of each cooling plate 28, and the support portion is the heating plate evacuation port 3001 or the cooling plate evacuation port. A sheet extending into 2801 and horizontally placed on the heating plate 30 or the cooling plate 28 can be lifted and the entire sheet can be placed on the cooling plate 28 or the heating plate 30, and the sheet is heated and softened, and both ends are deformed. This makes it easier to seal the negative pressure suction module 9 and the heating plate 30.

Electric heating tubes 31 are symmetrically attached to both sides of each heating plate 30, and a temperature sensor 32 is installed on the heating plate 30 between the two electric heating plates 31, thereby providing independent control over each heating plate 30. The temperature is gradually increased along the direction close to the discharge end of the heating plate 30 to gradually heat the sheet, and the heating is too fast to prevent the solder paste from dripping. A water supply pipe 29 and a drain pipe are connected to each of the cooling plates 28, and the cooling plate 28 lowers the temperature of the sheet on the cooling plate 28 by the cooling water and runs along the direction close to the discharge end. The temperature of the sheet is gradually reduced, thereby gradually lowering the temperature of the sheet, and the temperature is lowered too quickly to prevent the solidified solder paste from cracking.

A supply stand 21 is installed outside the supply end of the welding chamber 18, and a supply stand evacuation port 2101 linked to a support portion is installed at both ends of the supply stand 21, and the sheet is simply placed on the supply stand 21. , The transport mechanism 2 can transport the sheet to the welding table 20 in the welding chamber 18. A discharge stand 19 is installed at the discharge end of the welding chamber 18, and a discharge stand evacuation port 1901 linked to a support portion is installed at both ends of the discharge stand 19, and the transport mechanism 2 discharges the cooled sheet to the discharge stand 19. This vacuum welding furnace can be continuously welded, and discharge and supply can be realized without opening the furnace lid 4.

As shown in FIG. 5, a liquid storage cover 33 is installed at the bottom of the welding chamber 18, and both sides of the liquid storage cover 33 are gradually inclined downward from the side to the center, and the liquid storage cover 33 is formed. Liquid storage cover discharge pipes 3301 are symmetrically installed at both ends of the central portion of the above, and the liquid storage cover 33 can collect water droplets formed by liquefaction in the cooling region and discharge them to the outside of the welding chamber 18. Avoid interfering with the welding of the sheet in the welding chamber 18.

As shown in FIG. 6, the heating plate 30 is a rectangular plate, and the heating plate mounting holes 3004 are installed at the corners of the heating plate 30. Electric heating pipe mounting holes 3002 are symmetrically installed on both sides of the heating plate 30, and the electric heating pipe mounting holes 3002 are through holes installed horizontally, and electric heating is performed in any of the electric heating pipe mounting holes 3002. A tube 31 is attached, which can ensure uniform heating. A horizontal sensor mounting hole 3003 is further installed in the central portion of the heating plate 30, and the sensor mounting hole 3003 is a blind hole installed in parallel with the electric heating pipe mounting hole 3002, and the length of the sensor mounting hole 3003 is , Half the length of the heating plate 30, and the temperature sensor 32 is mounted in the sensor mounting hole 3003, whereby the temperature of the heating plate 30 can be detected in real time.

As shown in FIG. 7, the cooling plate 28 is a rectangular plate whose length and width are equal to the length and width of the heating plate 30, respectively, and cooling plate mounting holes 2804 are installed at the corners of the cooling plate 28, and the cooling plate 28 is provided. Horizontal water supply passages 2802 are symmetrically installed on both sides of the cooling plate 28, the water supply passages 2802 are installed along the longitudinal direction of the cooling plate 28, and a horizontal drainage passage 2803 is installed at one end of the cooling plate 28. Communicates with two water supply passages 2802, thereby making the temperature of the entire cooling plate 28 uniform and excellent in cooling effect. Connecting portions are installed at both ends of the drainage passage 2803 and the water supply passage 2802 to facilitate the connection between the water supply pipe 29 and the drainage pipe.

As shown in FIGS. 8 to 9, the welding chamber 18 is installed on the upper side of the rack 1 and is connected by the welding chamber mounting member 40 so as to be fixed to the rack 1. A plurality of welding chamber mounting members 40 are symmetrically installed on both sides of the welding chamber 18, and fixing portions 4001 protruding downward are symmetrically installed at both lower ends of the welding chamber mounting member 40 and penetrate the fixing portions 4001. A hole is installed, and the welding chamber mounting member 40 is connected so as to be fixed to the rack 1 by a bolt installed in the through hole of the fixing portion 4001. Stepped holes 4002 are symmetrically installed at both ends of the welding chamber mounting member 40, the diameter of the upper part of the stepped hole 4002 is larger than the diameter of the lower part, and the mounting pin 39 is attached to any of the stepped holes 4002. The mounting pin 39 has a cylindrical shape, and a screw hole 3901 is coaxially installed at the lower end of the mounting pin 39. The screw hole 3901 is a blind hole installed in the mounting pin 39, and the diameter of the mounting pin 39 is a step. Equal to the diameter of the upper part of the hole 4002, the lower end of the mounting pin 39 extends into the upper part of the stepped hole 4002 and is connected by bolts so as to be fixed to the welding chamber mounting member 40. The heating plate mounting hole 3004 of the heating plate 30 is fitted on the upper part of the mounting pin 39 to complete the mounting of the heating plate 30, and the cooling plate mounting hole 2804 of the cooling plate 28 is fitted on the upper part of the mounting pin 39. , The installation of the cooling plate 28 is completed, and it becomes easy to attach / detach.

As shown in FIG. 10, the furnace lid 4 includes an upper furnace lid cover and a lower furnace lid mounting plate 14, and the furnace lid cover is a rectangular housing that opens downward, and is a furnace lid mounting plate. Reference numeral 14 denotes a rectangular body plate, which is installed under the furnace lid cover and seals the opening under the furnace lid cover. Both the mounting arm 12 and the negative pressure suction module 9 are mounted on the furnace lid mounting plate 14.

In the present embodiment, the shield gas is nitrogen gas, the shield gas introduction pipe is the main nitrogen gas introduction pipe 5, and the main nitrogen gas introduction pipe 5 is installed at both ends of the furnace lid mounting plate 14. The upper end of the main nitrogen gas introduction pipe 5 extends from the furnace lid cover, and guide covers 6 are installed on any of the upper sides of each main nitrogen gas introduction pipe 5, and the guide cover 6 is the main nitrogen gas introduction pipe on the corresponding side. It is installed at a distance above the main nitrogen gas introduction pipe 5 and at a distance from the upper end of the main nitrogen gas introduction pipe 5. The guide cover 6 has a cylindrical shape, and either the guide cover 6 or the main nitrogen gas introduction pipe 5 is installed. The guide cover 6 is installed above the furnace lid cover, and the guide cover 6 and the main nitrogen gas introduction pipe 5 are installed coaxially, and the guide cover 6 is installed with the main nitrogen gas introduction pipe 5. Can guide to the connecting conduit. A gas cover 15 is installed between each main nitrogen gas introduction pipe 5 and the furnace lid mounting plate 14, and both the left and right sides of the upper part of the gas cover 15 are gradually inclined inward from the bottom to the top. Yes, the gas cover 15 is installed between the furnace lid mounting plate 14 and the furnace lid cover, the lower side of the gas cover 15 is installed so as to open, and the lower side of the gas cover 15 is the furnace lid mounting plate 14. A long hole for communicating the gas cover 15 and the welding chamber 18 is provided under the furnace lid 4 so as to be fixed to the welding chamber 18, whereby the shield gas is uniformly injected into the welding chamber 18. be able to.

A purification introduction pipe 7 and a purification exhaust pipe 8 are further installed on the upper side of the furnace lid mounting plate 14, and both the purification introduction pipe 7 and the purification exhaust pipe 8 are communicated with the welding chamber 18 by a gas cover 15, and the purification introduction pipe 7 And the purification exhaust pipe 8 are installed on the same side of the negative pressure suction module 9, so that the temperature of the nitrogen gas is too low and the flux is liquefied in the welding chamber 18 to lower the temperature of the sheet and further weld the sheet. It is possible to avoid extending the time. The purification exhaust pipe 8 communicates with the intake end of the purification module 59, whereby the flux in the solder paste is heated and the flux fume generated can be removed, so that the flux fume affects the welding of the sheet. To avoid.

As shown in FIGS. 11 to 13, sub-nitrogen gas introduction pipes 16 are symmetrically installed on both sides of the central portion of the furnace lid mounting plate 14. The sub-nitrogen gas introduction pipe 16 is installed above the furnace lid mounting plate 14, and the exhaust end of the sub-nitrogen gas introduction pipe 16 communicates with the welding chamber 18, whereby the nitrogen gas is more uniformly distributed in the welding chamber 18. It can be injected, ensuring that the nitrogen gas in the welding chamber 18 is completely exhausted and avoids reacting with oxygen after the sheet has been heated. An intake plate 17 is installed below the central portion of the furnace lid mounting plate 14, the intake plate 17 is a rectangular plate, and an intake port 1701 having an upward opening is installed on the upper side of the intake plate 17, and the intake port 1701 Is an elongated hole installed along the longitudinal direction of the intake plate 17, two intake plates 17 are installed on each side of the furnace lid mounting plate 14, and the two intake plates 17 are the furnace lids. A plurality of air intake holes 1702 are arranged in order along the longitudinal direction of the mounting plates 14 at intervals along the longitudinal direction in each of the intake plates 17, whereby the nitrogen gas is uniformly contained in the welding chamber 18. It can be guaranteed that it will be injected into. An inwardly recessed mounting port 1401 is installed on the lower side of the furnace lid mounting plate 14, the mounting port 1401 has a one-to-one correspondence with the intake plate 17, and the upper part of the intake plate 17 is the mounting port of the furnace lid mounting plate 14. The intake port 1701 of each intake plate 17 installed in 1401 forms an intake chamber surrounded by the attachment port 1401 of the furnace lid mounting plate 14, and the exhaust end of the sub-nitrogen gas introduction pipe 16 is the intake chamber. The communication facilitates the injection of nitrogen gas into the intake chamber.

As shown in FIG. 14, the negative pressure suction module 9 includes a negative pressure suction mounting frame 34, a sealing plate 36, a connecting pipe 37, and a negative pressure suction elevating cylinder 35, and the negative pressure suction mounting frame 34 includes a negative pressure suction mounting frame 34. Attached to the upper side of the furnace lid mounting plate 14, the negative pressure suction elevating cylinder 35 is attached to the negative pressure suction mounting frame 34, the piston rod of the negative pressure suction elevating cylinder 35 is installed vertically downward, and the control module is , Controls the downward movement of the negative pressure suction elevating cylinder 35, the sealing plate 36 is installed under the furnace lid mounting plate 14, the sealing plate 36 is installed horizontally, and the bottom of the sealing plate 36. Is recessed inward, and a seal ring is installed on the outer edge surrounding the seal plate 36 on the bottom surface of the seal plate 36. The seal plate 36 and the heating plate 30 surround the seal plate 36 to form a negative pressure chamber, and the sheet to be welded has a negative pressure. A horizontal connecting plate 38 is attached to the piston rod of the negative pressure suction elevating cylinder 35 installed in the chamber, the connecting plate 38 is installed above the furnace lid mounting plate 14, and the connecting pipe 37 is attached to the connecting plate 38. Installed between the sealing plate 36, the connecting pipe 37 is connected to the furnace lid mounting plate 14 so as to slide and seal, the lower end of the connecting pipe 37 communicates with the negative pressure chamber, and the upper end of the connecting pipe 37. A negative pressure suction tube is connected to.

As shown in FIG. 15, the present invention includes a transfer mechanism 2 and the welding mechanism of the vacuum welding furnace described above, and also includes a vacuum welding furnace in which the transfer mechanism 2 is provided in the rack 1 below the welding chamber 18. provide.

As shown in FIGS. 16 to 17, translation plates 41 are installed at intervals on the lower side of the welding chamber 18, and the transport mounting arm 45 is installed between the translation plate 41 and the welding chamber 18, and the transport mounting arm 45 is mounted. The arm 45 is attached so as to slide on the translation plate 41 by the mounting seat, and the translation mechanism is connected to the translation plate 41 and drives the translation plate 41 to translate along the sheet conveying direction. Horizontal transport mounting plates 52 are installed at intervals on the lower side of the translation plate 41, translation plate guide rails 51 are symmetrically installed on both sides of the upper portion of the transport mounting plate 52, and the translation plate guide rail 51 is a transport bar. Installed in parallel with the center line of 24, the translation plate 41 is attached so as to slide on the translation plate guide rail 51 by the translation plate slider installed on the lower side, and the transport attachment plate 52 is attached to the elevating mechanism. , Elevate with the elevating mechanism.

The elevating mechanism includes a horizontally installed translation frame 49, an elevating guide block 48, an elevating guide frame 47, and a transport elevating cylinder 46, and a horizontal translation frame guide rail 50 is attached to the rack 1 to form a translation frame. The guide rail 50 is installed in parallel with the translation plate guide rail 51, and the translation frame 49 is attached so as to slide on the translation frame guide rail 50 by the lower translation frame slider. The transport elevating cylinder 46 is horizontally mounted on the rack 1, the piston rod of the transport elevating cylinder 46 is installed toward the translation frame 49, and the piston rod of the transport elevating cylinder 46 is connected to the translation frame 49. , The translation frame 49 is driven so as to move along the sheet conveying direction. The elevating guide block 48 is symmetrically installed on both sides of the translation frame 49, the elevating guide portion is installed on the upper side of the elevating guide block 48, and the elevating guide portion gradually moves along the direction approaching the transport elevating cylinder 46. The elevating guide frame 47 has a one-to-one correspondence with the elevating guide block 48, and the elevating guide wheel is rotatably attached to the lower side of the elevating guide frame 47. It is attached to the elevating guide portion of the elevating guide block 48 to realize the elevating and lowering of the transport mounting plate 52. A vertical elevating guide rail is installed on the rack 1, and the elevating mounting plate 52 is attached so as to slide on the elevating guide rail by the elevating slider to guide the transport mounting plate 52.

The translation mechanism includes a translation motor mounting frame 54, a transport moving frame 55, and a translation motor 53. The translation motor mounting frame 54 is installed under the transport mounting plate 52, and the translation motor 53 is mounted on the translation motor. Attached to the frame 54, the output shaft of the translational motor 53 is installed horizontally and parallel to the sheet transport direction. A translation screw is coaxially attached to the translation motor 53, the translation screw rotates in synchronization with the translation motor 53, and the transfer movement frame 55 is attached so as to slide on the translation motor mounting frame 54. A translation nut linked to the translation screw is installed at 55. The upper side of the transport moving frame 55 is connected to the translation plate 41 after passing through the transport mounting plate 52, drives the translation plate 41 to move in synchronization, and the transport moving frame 55 and the transport mounting plate 52 slide. It is installed to do.

The opening / closing mechanism includes an opening / closing mounting rod 42, an opening / closing guide plate 43, an opening / closing moving frame 56, an opening / closing motor mounting frame 57, an opening / closing motor moving frame 56, and an opening / closing power module. The module is an opening / closing motor 58. The opening / closing motor mounting frame 57 is installed below the transport mounting plate 52, and the upper side of the opening / closing motor mounting frame 57 is connected to the translation plate 41 and moves in synchronization with the translation plate 41. , It is connected so as to slide on the transport mounting plate 52. The opening / closing motor 58 is attached to the opening / closing motor mounting frame 57. The opening / closing moving frame 56 is attached so as to slide on the opening / closing motor mounting frame 57, an opening / closing screw is coaxially attached to the output shaft of the opening / closing motor 58, and an opening / closing nut linked to the opening / closing screw is installed on the opening / closing moving frame 56. The opening / closing motor 58 is driven by a pair of screw nuts so as to translate the opening / closing moving frame 56 along the sheet conveying direction. A mounting rod slider is installed on the upper side of the translation plate 41, the opening / closing mounting rod 42 is mounted so as to slide on the mounting rod slider, the opening / closing mounting rod 42 is installed along the sheet conveying direction, and the opening / closing moving frame 56 is installed. The upper side in front of the above is connected to the opening / closing mounting rod 42 and is driven so as to move the opening / closing mounting rod 42 in synchronization, and the opening / closing moving frame 56 is connected so as to slide on the transport mounting plate 52. Opening / closing guide plates 43 are installed on both ends of the opening / closing mounting rod 42, opening / closing guides are installed on both sides of the opening / closing guide plate 43, and the opening / closing guides gradually move inward along the sheet conveying direction. The opening / closing guide ring 44 is attached to both ends of each transport mounting arm 45, and the opening / closing guide ring 44 and the opening / closing guide portion of the opening / closing guide plate 43 are further placed between the two transport mounting arms 45. An opening / closing spring to be bonded is installed. A mounting arm guide rail is further attached to the translation plate 41, the mounting arm guide rail is installed perpendicular to the opening / closing mounting rod 42, and the transport mounting arm 45 is mounted so as to slide on the mounting arm guide rail by the opening / closing slider. ..

As shown in FIGS. 18 to 19, the purification module 59 includes a purification box 61, a coil 67 and a strainer 64 installed in the purification box 61, and the purification box 61 is a rectangular parallelepiped housing and the purification box 61. A septic box introduction pipe 62 is connected to one side, a septic box exhaust pipe is connected to the other side of the septic box 61, and a fan 65 is installed between the septic box exhaust pipe and the welding chamber 18. The coil 67 is installed in the purification box 61, and the oil supply box 60 is further connected to the coil 67. The oil exhaust port of the oil supply box 60 communicates with one end of the coil 67 via a circulation pump, and the other end of the coil 67. Communicates with the refueling box 60 to realize circulation of cooling oil. Further, fins 68 connected to the coil 67 are installed in the purification box 61, whereby heat exchange with nitrogen gas can be performed faster and the temperature of nitrogen gas can be reduced. A strainer mounting box 63 is installed on the side of the septic box 61 close to the septic box exhaust pipe, the exhaust pipe of the septic box communicates with the purification box 61 by the strainer mounting box 63, and the strainer 64 is placed in the strainer mounting box 63. Installed vertically, the cooled nitrogen gas is discharged through the septic box exhaust pipe after passing through the strainer 64 and transported back into the welding chamber 18, where the strainer 64 filters the liquefied flux. Is used to remove the flux fume in the nitrogen gas.

A flux recovery barrel 66 is further installed on the lower side of the septic box 61, and the lower side of the septic box 61 has an inclined shape in which one end close to the flux recovery barrel 66 is lower than the other end, thereby lowering the temperature and liquefying the liquid. Can flow into the flux recovery barrel 66.

The above-mentioned method for welding a vacuum welding furnace, which includes the following steps.

1) The furnace lid 4 seals the welding chamber 18, and the shield gas introduction pipe fills the welding chamber 18 with the shield gas.

The welding chamber 18 is filled with nitrogen gas via the main nitrogen gas introduction pipe 5 and the sub-nitrogen gas introduction pipe 16, the entire welding chamber 18 is filled with nitrogen gas, and the air in the welding chamber 18 is completely discharged. .. At the same time, the electric heating pipe 31 heats the heating plate 30, and the water supply pipe 29 allows the cooling water to pass through the cooling plate 28.

2) The transport mechanism 2 transports the sheets one by one into the negative pressure chamber, and the heating region gradually heats the sheets being transported.

The seat is placed on the supply base 21, the elevating mechanism drives the transport bar 24 to move downward, and the opening / closing mechanism drives the two transport bars 24 to move downward to a position close to the seat. , Aligned with the supply base evacuation port 2101 on the supply base 21, the elevating mechanism drives the transport bar 24 to move downward again so that the support portion is located in the supply base evacuation port 2101, and then electrically. The push rod 69 is driven to move the support so that the support extends underneath the seat. The elevating mechanism drives the transport bar 24 to move upward, completes the lifting of the seat, and at the same time opens the supply end by the baffle plate 27 at the supply end, and the translation mechanism is close to the discharge end of the welding chamber 18. The transfer bar 24 is driven so as to move in the direction of the welding, and the sheet is transferred to the heating plate 30 in the welding chamber 18. The transport mechanism 2 sequentially transports the sheet, heats the sheet by each of the heating plates 30, and then enters the heating plate 30 directly under the negative pressure suction module 9.

The negative pressure suction elevating cylinder 35 drives the sealing plate 36 to move downward so that the sealing plate 36 and the heating plate 30 directly below the sealing plate 36 form a sealed negative pressure chamber, and at the same time, the negative pressure suction pipe is formed. The gas in the negative pressure chamber is extracted, the inside of the negative pressure chamber is maintained in a negative pressure or vacuum state, the air bubbles in the solder paste are surely overflowed, and the quality of welding is guaranteed. After the welding is completed, the negative pressure suction elevating cylinder 35 is driven so as to raise the sealing plate 36.

3) The transport mechanism 2 transports the welded sheet to the discharge end in the negative pressure chamber, and the cooling region slowly cools the sheet.

The transport mechanism 2 continues to transport the sheet toward the discharge end, sequentially cools it by each cooling plate 28, and then moves onto the discharge table 19 to complete welding of the sheet.

Example 2

The difference between the second embodiment and the first embodiment is that the support portion is directly attached to the transport bar 24, the heating plate evacuation ports 3001 are installed at both ends of the heating plate 30, and the cooling plate evacuation ports 2801 are provided at both ends of the cooling plate 28. It is a point where the seat is installed and the support part supports the seat at both ends of the seat.

The above description is merely a preferred embodiment of the present invention, and does not limit the present invention, and any person skilled in the art will have an equivalent embodiment similarly modified by the technical contents disclosed above. Can be changed or transformed into. However, any simple modifications, equivalent modifications and modifications made to the above examples within the same scope as the present invention without departing from the content of the technical solution of the present invention are still the same as the present invention. It belongs to the scope of protection of the solution.

Claims (12)

A welding mechanism of a vacuum welding furnace, including a welding chamber (18) and a furnace lid on the upper side of the welding chamber (18), and a welding chamber is installed between the furnace lid (4) and the welding chamber (18). The welding table (20) is provided in the lower part of the welding chamber (18), and the side close to the supply end of the welding table (20) is the heating region, and the side close to the discharge end of the welding table (20). Is a cooling region, and the negative pressure suction module (9) is installed on the upper side of one end close to the cooling region of the heating region, and is mounted on the furnace lid (4) so as to be able to move up and down. A welding mechanism for a vacuum welding furnace, characterized in that a sealed negative pressure chamber is formed around the bottom of the welding chamber and a heating region, and a shield gas introduction pipe is installed in a welding chamber (18) or a furnace lid (4). The welding table (20) includes a plurality of heating plates (30) and a plurality of cooling plates (28), a heating region is formed by connecting the plurality of heating plates (30), and a plurality of cooling regions are formed. The welding mechanism of the vacuum welding furnace according to claim 1, wherein the cooling plates (28) of the above are joined together to form a welding mechanism. Electric heating tubes (31) are symmetrically installed on both sides of each heating plate (30), a sensor mounting hole (3003) is installed in the center of the heating plate (30), and a sensor mounting hole (3003) is installed. The vacuum welding furnace according to claim 2, wherein is a blind hole installed between two electric heating pipes (31), and a temperature sensor (32) is attached to the sensor mounting hole (3003). Welding mechanism. Water supply passages (2802) are symmetrically installed on both sides of the cooling plate (28), and drainage passages (2803) communicating with the two water supply passages (2802) are installed at at least one end of the cooling plate (28). The welding mechanism of the vacuum welding furnace according to claim 2, wherein the welding mechanism is characterized by the above. A liquid storage cover (33) is installed on the lower side of the welding chamber (18), and both sides of the bottom of the liquid storage cover (33) are gradually inclined downward from the side to the center to store liquid. The welding mechanism of a vacuum welding furnace according to claim 1, wherein a liquid storage cover discharge pipe (3301) is provided at the bottom of the cover (33). The shield gas introduction pipe is a main nitrogen gas introduction pipe (5), and main nitrogen gas introduction pipes (5) are installed at both ends of the furnace lid (4), and the central portion of the furnace lid (4) is provided. The vacuum welding furnace according to claim 1, wherein the sub-nitrogen gas introduction pipes (16) are symmetrically installed on both sides, and the sub-nitrogen gas introduction pipes (16) are communicated with the welding chamber (18). Welding mechanism. Intake plates (17) are symmetrically installed on both sides of the lower part of the furnace lid (4), and an intake port (1701) that opens upward is provided on the upper part of the intake plate (17), and the intake plate (4) is surrounded by intake air. A plurality of air jet holes (1702) that form a chamber and communicate the intake port (1701) and the welding chamber (18) are installed in the intake plate (17) at intervals, and a secondary nitrogen gas introduction pipe (16) is provided. The welding mechanism of a vacuum welding furnace according to claim 6, wherein the welding mechanism communicates with an intake port (1701). The negative pressure suction module (9) includes a sealing plate (36) and a negative pressure suction elevating cylinder (35), and the sealing plate (36) is installed above the heating region and parallel to the heating region. The vacuum welding furnace according to claim 1, wherein the bottom of the sealing plate (36) and the heating region form a closed negative pressure chamber, and the negative pressure suction pipe is connected to the negative pressure chamber. Welding mechanism. The sealing plate (36) is installed on the lower side of the furnace lid (4), and the negative pressure suction elevating cylinder (35) is installed on the upper side of the furnace lid (4) of the negative pressure suction elevating cylinder (35). The eighth aspect of claim 8, wherein the piston rod is connected to the sealing plate (36) via the connecting pipe (37), and the connecting pipe (37) communicates the negative pressure chamber and the negative pressure suction pipe. Welding mechanism of vacuum welding furnace. The welding mechanism for a vacuum welding furnace according to claim 1, further comprising a purification module (59), wherein both the intake end and the exhaust end of the purification module (59) communicate with the welding chamber. ,
The purification module (59) includes a purification box (61), a coil (67) and a strainer (64) installed in the purification box (61), and the intake end and the exhaust end are the purification box (61). Strainers (64) are installed close to the exhaust end, seal the exhaust end, are filled with coolant circulating in the coil (67), and are installed on both sides of the septic box (61). The welding mechanism of a vacuum welding furnace according to claim 10, wherein a fan (65) is installed between the welding chamber (18) and the welding chamber (18). The welding mechanism of a vacuum welding furnace according to claim 11, wherein the purification module (59) further includes fins (68) installed in a purification box (61).

Images