JP2021507814A - Vacuum welding furnace control system and its control method - Google Patents

Abstract

The vacuum welding furnace control system includes a control module and a transfer mechanism, the vacuum welding furnace includes a welding chamber, a welding table is installed at the lower part of the welding chamber, a furnace lid is installed at the upper part, and the welding chamber and the furnace lid are installed. A welding chamber is formed between the welding chambers, and the output end of the control module is connected to the transfer mechanism, the negative pressure suction module, the shield gas introduction pipe, the heating module, and the cooling module, and the supply end and the discharge end of the welding table. The side close to is a heating region and a cooling region, respectively, and the negative pressure suction module is installed on the furnace lid so as to be able to move up and down on the upper side of one end close to the cooling region of the heating region, and the bottom and the heating region surround it. A closed negative pressure chamber is formed, the heating module and the cooling module are installed inside the heating region and the cooling region, and the shield gas introduction pipe is installed in the welding chamber or the furnace lid and communicates with the inside of the welding chamber. The output end of the control module is connected to the switch of the shield gas introduction pipe. It can be heated while transporting the sheet, the welding speed is high, and oxidation is avoided. [Selection diagram] Fig. 1

Description

It is a vacuum welding furnace control system and its control method, and belongs to the vacuum welding technology field.

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) Both ends of the sheet must extend from the support base in order for the transmission mechanism to facilitate the transfer of the sheet, and the transmission mechanism lifts and conveys the sheet through the extension portions at both ends of the sheet. Since the sheet after heating is soft, the extending parts at both ends of the sheet bend downward. Therefore, the positions of the chips at both ends of the sheet and the contact points of the sheet cannot be aligned, a large number of defective products are generated, and follow-up is increased.

(3) 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.

The technical problem to be solved by the present invention is a vacuum welding furnace control system that solves the problems of the prior art, heats the sheet in the process of transporting the sheet, has a high welding speed, and avoids oxidation of the sheet. It is to provide a control method.

The technical solution used by the present invention to solve the technical problem is to provide a vacuum welding furnace control system. The vacuum welding furnace control system includes a control module and a transfer mechanism, the vacuum welding furnace includes a welding chamber, a welding table is installed at the lower part of the welding chamber, and a furnace lid is installed so as to cover the upper part thereof. A welding chamber is formed between the welding chamber and the furnace lid, the output end of the control module is connected to a transport mechanism, and further includes a negative pressure suction module, a shield gas introduction pipe, a heating module, and a cooling module. , The output end of the control module is connected to the negative pressure suction module, the heating module and the cooling module, respectively, the side close to the supply end of the welding table is the heating area, and the side close to the discharge end of the welding table is the cooling area. 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 installed so as to be able to move up and down on the furnace lid, and the bottom of the negative pressure suction module and the heating region surround and form a sealed negative pressure chamber. The heating module is installed inside the heating area, the cooling module is installed inside the cooling area, the shield gas introduction pipe is installed in the welding chamber or the furnace lid, communicates with the inside of the welding chamber, and the output of the control module. The end is connected to the switch of the shield gas introduction pipe.

Preferably, the transfer mechanism includes a transfer bar and an elevating mechanism, a translation mechanism and an opening / closing mechanism installed under the welding chamber, and output ends of the control module are attached to the elevating mechanism, the translation mechanism and the opening / closing mechanism, respectively. Two transport bars are connected symmetrically, and the central portion thereof is installed in the welding chamber, and the opening / closing mechanism is connected to the two transport bars at the same time to open and close the two transport bars. Driven, the translation mechanism is connected to the opening / closing mechanism and is driven to move the opening / closing mechanism in a direction approaching or separating from the discharge end, and the elevating mechanism is connected to the translation mechanism to elevate the translation mechanism. Each of the transport bars is provided with a plurality of support portions, and a plurality of evacuation ports are provided at both ends of the welding table, and the evacuation ports correspond one-to-one with the support portions.

Preferably, both ends of the welding chamber are sealed by end covers, transfer ports are symmetrically installed on both sides of each end cover, and the transfer bar passes through the transfer port and is connected to an opening / closing mechanism. , The bottom of the end cover and the welding table are installed at intervals.

Preferably, the baffle plate mounting grooves are symmetrically installed on both sides of each of the end covers, the plane on which the baffle plate mounting grooves are located is perpendicular to the center line of the transport bar, and the baffle plate slides in the baffle plate mounting grooves. The baffle plate is slid and sealed to the transfer bar, and the baffle plate is linked to the corresponding end cover to seal the end of the weld chamber.

Preferably, a transport mounting arm having a one-to-one correspondence with the transport bar is provided on the lower side of the welding chamber, both ends of the transport mounting arm are connected to both ends of the corresponding transport bar, and the opening / closing mechanism has two transports. It is connected to the mounting arm.

Preferably, the opening / closing mechanism includes a horizontally installed opening / closing guide plate and an opening / closing power module, and the opening / closing guide plate is installed between two transport bars and discharged to either side of the opening / closing guide plate. An opening / closing guide that is gradually inclined inward along the direction close to the end is provided, and an opening / closing guide ring that is attached to the opening / closing guide is attached to any of the lower sides of each transport bar. A tensioned opening / closing spring is provided between the transport bars, the opening / closing power module is connected to the opening / closing guide plate, the output end of the control module is connected to the opening / closing power module, and the opening / closing power module is close to or close to the discharge end. It is driven so as to move the opening / closing guide plate along the direction of separation.

Preferably, the elevating mechanism includes an elevating guide block and a transport elevating cylinder, and a vertically inclined elevating guide portion is gradually installed on the upper side of the elevating guide block along a direction close to the discharge end to translate. An elevating guide wheel to be attached to the elevating guide is attached to the lower side of the mechanism, the piston rod of the elevating cylinder is connected to the elevating guide block, and the output end of the control module is connected to the elevating cylinder to elevate the transport. The cylinder drives the elevating guide block to move along a direction that is close to or away from the discharge end.

Preferably, the heating region comprises a plurality of heating plates and the cooling region comprises a plurality of cooling plates.

Preferably, heating modules having electric heating tubes are symmetrically installed on both sides of each of the heating plates, a sensor mounting hole is installed in the center of the heating plate, and the sensor mounting hole is located between the two electric heating tubes. The temperature sensor is mounted in the sensor mounting hole, the temperature sensor is connected to the input end of the control module, and the output end of the control module is connected to the electric heating tube.

Preferably, cooling modules having water supply passages on both sides of the cooling plate are symmetrically installed, drainage passages communicating with two water supply passages are installed at at least one end of the cooling plate, and the output end of the control module is the water supply passage. Connected to the switch.

Preferably, the shield gas introduction pipe includes a main nitrogen gas introduction pipe and a sub-nitrogen gas introduction pipe, and main nitrogen gas introduction pipes are installed at both ends of the furnace lid, and both sides of the central portion of the furnace lid are provided. The sub-nitrogen gas introduction pipes are installed symmetrically, the exhaust ends of the main nitrogen gas introduction pipe and the sub-nitrogen gas introduction pipe communicate with the welding chamber, respectively, and the output ends of the control module are the main nitrogen gas introduction pipe and the sub-nitrogen gas. It is connected to each switch of the introduction pipe.

Preferably, the intake plates are symmetrically installed on both sides of the lower portion of the furnace lid, and the intake port that opens upward provided on the upper portion of the intake plate forms an intake chamber that surrounds the furnace lid, and is welded to the intake plate on the intake plate. A plurality of air jet holes that communicate with the chamber are installed at intervals, and the auxiliary nitrogen gas introduction pipe communicates 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, a negative pressure suction tube is connected to the negative pressure chamber, and the output end of the control module is connected to a switch of the negative pressure suction tube and a negative pressure suction elevating cylinder, respectively.

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, and the output end of the control module is connected to the piston rod.

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 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. Installed so that the exhaust end is sealed, the coil is connected to a circulation pump, filled with coolant circulating in the coil via the circulation pump, and a fan is placed between the exhaust end of the septic box and the welding chamber. Installed, the output end of the control module is connected to the motor input end of the fan and the switch of the circulation pump.

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

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 is stored on the bottom of the liquid storage cover. A cover discharge pipe is provided.

It is a control method of the vacuum welding furnace control system, and is characterized by including the following steps.

Step 1001: The control module controls the furnace lid to cover the upper part of the welding chamber and seal it so that the shield gas introduction pipe is switched on so that the welding chamber is filled with the shield gas. Controlled, the heating area is controlled to heat the sheet above it, and the cooling area is controlled to cool the sheet above it.

Step 1002: The control module controls the transport mechanism to transport a plurality of sheets from the supply end to the discharge end so as to convey a predetermined distance each time.

Step 1003: Each time the transfer mechanism completes the transfer operation, the negative pressure suction module is lowered to form a negative pressure chamber sealed with a heating region, and the negative pressure chamber is subjected to a negative pressure suction or vacuum suction operation for a predetermined time. Control to do.

Step 1004: After performing the negative pressure suction or vacuum suction operation, the control module controls the transport mechanism to continue transporting the sheet to the discharge end.

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

1. The vacuum welding furnace control system and its control method provide a heating region and heat the sheet to weld the sheet at high speed in a 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. Further, since the temperature of the sheet is too high in the processing process of the sheet and the sheet is easily denatured, the problem that the sheet is deformed in the processing process and the defect rate does not increase does not occur. 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 chips and the sheet It is possible to prevent the contact from becoming defective 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. The opening / closing mechanism drives the two transport bars to open and close, and in conjunction with the elevating mechanism, the support portion extends into the evacuation port of the welding table, the seat is lifted by both ends of the seat, and the translation mechanism transports. The bar drives the seat to translate, thereby completing the translation movement of the seat.

9. The transport bar passes through the transport port, extends from the welding chamber, and is connected to the opening / closing mechanism. Not only can the sheet in the welding chamber be transported, but the sheet can be transported into the welding chamber, and the welded sheet in the welding chamber can be transported outside the welding chamber without opening the furnace lid during the welding process. It is possible to carry in and out the sheet.

10. The baffle plate moves in the baffle plate mounting groove with the movement of the transport bar, so that the welding chamber can be sealed immediately, the leakage of the shield gas is avoided, and the consumption of the shield gas is reduced. , Further reduce welding cost.

11. The opening / closing mechanism is connected to the transport mounting arm on the lower side of the welding chamber, facilitating the connection of the transport bar.

12. The opening / closing power module is driven to move the opening / closing guide plate, and the opening / closing guide portion of the opening / closing guide plate is driven by the opening / closing guide wheels to move the two transport bars in opposite directions in synchronization with each other. The opening / closing spring can always crimp the opening / closing guide ring to the opening / closing guide portion of the opening / closing guide plate, realizes the opening / closing of two transfer bars, facilitates the transfer of the sheet, and the transfer bar is a negative pressure suction module. It is possible to avoid interfering with the operation of the transfer bar, the stroke of the transport bar is stable, and the end cover is not damaged.

13. The transport elevating cylinder is driven so as to translate the elevating guide block, the elevating guide portion of the elevating guide block is driven so as to elevate the translation mechanism by the elevating guide wheel, and the two transport bars are synchronized. It realizes one up and down, guarantees that the up and down operation of the transport bar is stable, and the up and down stroke is specified, and the welding chamber is not damaged.

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

15. Negative pressure suction elevating cylinder is connected to the sealing plate via a connecting pipe and drives 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.

16. 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.

17. 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.

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

19. The vacuum welding furnace control system protects the sheet in the welding chamber with a shield gas, prevents the hot sheet from reacting with oxygen, and the heating region gradually heats the sheet to negatively pressure the sheet. Allows the temperature to reach or approach the welding temperature when moved into the chamber, allowing high speed welding to be completed in the welding time in the negative pressure chamber, shortening the welding time, improving the welding speed, The cooling region can gradually cool the sheet, not only ensuring that it cools thoroughly, but also avoiding deformation of the sheet due to too fast cooling.

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

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 A in FIG.

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

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

It is a partially enlarged view of B in FIG.

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 top view of the heating plate.

It is a top sectional schematic diagram of the cooling plate.

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

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 diagram of a 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.

It is a work flowchart of a vacuum welding furnace control system.

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: Connecting arm, 11: Swing arm, 12: Mounting arm, 13: Connecting 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

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.

A vacuum welding furnace control system including a control module, a transfer mechanism 2, a negative pressure suction module 9, a shield gas introduction pipe, a heating module, and a cooling module. The vacuum welding furnace includes a welding chamber 18. , A welding table 20 is installed in the lower part of the welding chamber 18, a furnace lid 4 is installed so as to cover the upper part thereof, a welding chamber is formed between the welding chamber 18 and the furnace lid 4, and the output end of the control module is formed. Is connected to the transfer mechanism 2, a part of the transfer mechanism 2 is movably installed in the welding chamber 18, and the output end of the control module is connected to the negative pressure suction module 9, the heating module and the cooling module, respectively. The side close to the supply end of the welding table 20 is a heating region, the side close to the discharge end of the welding table 20 is a cooling region, and the negative pressure suction module 9 is one end close to the cooling region of the heating region. It is installed on the upper side of the furnace lid 4 so as to be able to move up and down, and the bottom of the negative pressure suction module 9 and the heating region form a closed negative pressure chamber, and the heating module is installed inside the heating region. The cooling module is installed inside the cooling region, the shield gas introduction pipe is installed in the welding chamber 18 or the furnace lid 4, communicates with the inside of the welding chamber 18, and the output end of the control module is the shield gas introduction pipe. Connected to the switch.

In the heating region of the vacuum welding furnace, the sheet can be quickly welded in the negative pressure chamber by heating the sheet. 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. Further, since the temperature of the sheet is too high in the processing process of the sheet and it is easily denatured, the sheet is not deformed in the processing process and the problem of increasing the defective rate does not occur. 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. And 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.

Specifically, as shown in FIG. 1, the welding chamber 18 is a rectangular parallelepiped housing that opens upward, both ends of the welding chamber 18 are supply ends and discharge ends, respectively, and the welding chamber 18 is a rack 1. The transport mechanism 2 is mounted on the lower rack 1 of the welding chamber 18. The furnace lid 4 is attached to the upper side of the welding chamber 18 and seals the upper side of the welding chamber 18. The negative pressure suction module 9 is installed in the furnace lid 4, and the lower end of the negative pressure suction module 9 extends into the welding chamber 18 after passing through the furnace lid 4, and the negative pressure suction module 9 heats in the vicinity of the cooling region. Installed at the top of the area. A plurality of negative pressure suction modules 9 may be installed, thereby increasing the welding speed, and one may be installed.

The connecting arms 10 are symmetrically installed at both ends of the rack 1, the upper end of the connecting arm 10 extends upward, and the upper end of the connecting arm 10 is installed higher than the welding chamber 18. Mounting arms 12 are symmetrically installed at both ends of the furnace lid 4, the mounting arms 12 are installed horizontally, one end of each mounting arm 12 is connected so as to be fixed to the furnace lid 4, and the other end is a connecting arm. It is rotatably connected to the upper end of 10. The furnace lid cylinder 3 that drives the furnace lid 4 to open and close is further connected to the furnace lid 4, and the piston rod of the furnace lid cylinder 3 is connected to the mounting arm 12 via the connecting rod 13 and the swing arm 11 for mounting. The upper end of the arm 12 is rotatably connected to the central portion of the mounting arm 12, the lower end of the mounting arm 12 is rotatably connected to the central portion of the connecting rod 13, and one end of the connecting rod 13 is rotatably connected to the rack 1 or the connecting rod 13. It is rotatably connected to the arm 10 and the other end rotatably connected to the piston rod of the furnace lid cylinder 3, and the control module controls the movement of the piston rod of the furnace lid cylinder 3, thereby the furnace lid 4. Achieve automatic opening and closing.

As shown in FIG. 2, 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 this embodiment, the shield gas is nitrogen gas, the shield gas introduction pipe includes 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. It can be aligned and the control system controls the corresponding shield gas to enter the main nitrogen gas inlet pipe 5 from the guide cover 6. 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 communicate with the welding chamber 18 by the gas cover 15, and the gas cover 15 Is installed in the furnace lid mounting plate 14 and the furnace lid cover, the purification introduction pipe 7 and the purification exhaust pipe 8 are installed on the same side of the negative pressure suction module 9, and the purification exhaust pipe 8 is the purification introduction pipe. It is installed between the 7 and the negative pressure suction module 9, so that the temperature of the nitrogen gas after purification is too low, so that the temperature of the sheet is reduced and the welding time of the sheet is further avoided. The purification exhaust pipe 8 communicates with the intake end of the purification module 59, and the control module controls the circulation, filtration, and purification of the gas in the welding chamber 18 by the purification module 59, whereby the flux in the solder paste is heated. The flux fume generated can be removed, and the flux fume does not affect the welding of the sheet.

As shown in FIGS. 3 to 5, the shield gas introduction pipe further includes the sub-nitrogen gas introduction pipe 16, and the 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 control system controls the suction of nitrogen gas to the intake end of the sub-nitrogen gas introduction pipe 16 and exhausts the sub-nitrogen gas introduction pipe 16. The edges communicate with the welding chamber 18 so that nitrogen gas can be more evenly injected into the welding chamber 18 to ensure that the nitrogen gas in the welding chamber 18 is completely discharged and the sheet Avoid reacting with oxygen after being 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 under 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 FIGS. 6 to 7, 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 output end of the control module is an elevating mechanism. , Each connected to a translation mechanism and an opening / closing mechanism, controls the transfer of sheets, the central portion of the transfer bar 24 is installed in the welding chamber 18, both ends of the welding chamber 18 are sealed by end covers 26, and Conveyance ports 2601 are installed on both sides of each end cover 26, the transport bars 24 are installed horizontally along the longitudinal direction of the welding chamber 18, and the two transport bars 24 are on both sides of the welding chamber 18. Both ends of each transport bar 24 pass through the transport 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. 8, 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. 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 a plurality of support portions are spaced apart from each of the transport bars 24. The support portion extends into the heating plate evacuation port 3001 or the cooling plate evacuation port 2801, lifts the sheet placed horizontally on the heating plate 30 or the cooling plate 28, and heats the entire sheet to the cooling plate 28 or the cooling plate 28. It can be placed on the plate 30, the sheet is heated and softened, both ends are prevented from being deformed, and the negative pressure suction module 9 and the heating plate 30 are easily sealed.

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, and the temperature sensor 32 is an input end of the control module. The temperature signal is transmitted to the control module, and the control module controls the temperature of the corresponding two electric heating tubes 31 based on the temperature feedback, thereby realizing independent control for each heating plate 30. The temperature is gradually increased along the direction close to the discharge end of the heating plate 30, and the sheet is gradually heated to prevent the solder paste from dripping because the heating is too fast. A water supply pipe 29 and a drain pipe are connected to each of the cooling plates 28, the control module controls the opening and closing of the water supply pipe 29, and the cooling plate 28 lowers the temperature of the sheet on the cooling plate 28 by the cooling water. Moreover, the temperature of the cooling plate 28 gradually decreases along the direction close to the discharge end, whereby the temperature of the sheet is gradually lowered, and the solidified solder paste is prevented from cracking due to the temperature lowering being too fast.

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. 9, 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. 10, the heating plate 30 is a rectangular plate, and a heating plate mounting hole 3004 is installed at a corner 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. 11, 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. 12 to 13, 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. 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 the control module, and the control module controls gas extraction with respect to the negative pressure chamber of the negative pressure suction tube.

As shown in FIGS. 15 to 16, translation plates 41 are installed on the lower side of the welding chamber 18 at intervals, 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 installed. The 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 be translated 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 frame 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 a translation motor. Attached to the mounting 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 in. 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 mounting rod is installed along the sheet conveying direction, and the opening / closing moving frame 56 is 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. 17 to 18, 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.

As shown in FIG. 19, the control method of the vacuum welding furnace control system includes the following steps.

Step 1001: The control module controls the furnace lid 4 to cover the upper part of the welding chamber 18 and seal it, turn on the switch of the shield gas introduction pipe, and fill the welding chamber 18 with the shield gas. The heating area is controlled to heat the sheet above it, and the cooling area is controlled to cool the sheet above it.

By the control module, the main nitrogen gas introduction pipe 5 and the sub-nitrogen gas introduction pipe 16 each fill the welding chamber 18 with nitrogen gas, the nitrogen gas fills the entire welding chamber 18, and the air in the welding chamber 18 is completely filled. Control to discharge. At the same time, the temperature sensor 32 feeds back the data to the control module, and the control module controls the heating of the heating plate 30 of the electric heating pipe 31 based on the temperature acquired in real time, and enters the cooling plate 28 of the water supply pipe 29. It is possible to control the supply of cooling water, control the start of the fan 65 of the purification module 59, and control the start of the circulation pump connected to the coil 67.

Step 1002: The control module controls the transport mechanism 2 to transport a plurality of sheets from the supply end to the discharge end so as to convey a predetermined distance each time.

The seat is placed on the supply base 21, the elevating mechanism controls driving the transport bar 24 to move downward, and the opening / closing mechanism moves the two transport bars 24 inward to a position close to the seat. To align with the supply base evacuation port 2101 on the supply base 21, the elevating mechanism drives the transfer bar 24 to move downward again, and the support portion is located in the supply base evacuation port 2101. It is controlled, and then the opening / closing mechanism drives the two transport bars 24 to move inward again, and controls the support portion to move to the lower side of both ends of 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 to move in the direction of the welding, and the sheet is controlled to be 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.

Step 1003: Each time the transfer mechanism 2 completes the transfer operation, the negative pressure suction module 9 is lowered to form a closed negative pressure chamber surrounded by the heating region, and negative pressure suction or negative pressure suction for a fixed time with respect to the negative pressure chamber is performed. Control to perform vacuum suction operation.

The control module controls the negative pressure suction elevating cylinder 35 to move the sealing plate 36 downward, and controls the sealing plate 36 and the heating plate 30 directly below the sealing plate 36 to form a sealed negative pressure chamber. At the same time, the negative pressure suction pipe extracts the gas in the negative pressure chamber and controls the inside of the negative pressure chamber to maintain a negative pressure or vacuum state, ensuring that the air bubbles in the solder paste overflow, and the quality of welding. Guarantee. After the welding is completed, the negative pressure suction elevating cylinder 35 is driven so as to raise the sealing plate 36.

Step 1004: After performing the negative pressure suction or vacuum suction operation, the control module controls the transport mechanism 2 to continue transporting the sheet to the discharge end, and the transport mechanism 2 continues to transport the sheet to the discharge end. Controlled, the sheets are sequentially cooled through each cooling plate 28 and then moved to the discharge table 19 to complete the welding of the sheets.

The above description is merely a preferred embodiment of the present invention, and is not a limitation of the present invention in any other form, and any person skilled in the art will be equally modified by the technical contents disclosed above. It can be changed or transformed into an embodiment. 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 (20)

Includes control module and transport mechanism (2)
The vacuum welding furnace includes a welding chamber (18), a welding table (20) is installed in the lower part of the welding chamber (18), and a furnace lid (4) is installed so as to cover the upper part of the welding table (20). A welding chamber is formed between the welding chamber (18) and the furnace lid (4), and the output end of the control module is connected to the transport mechanism (2).
Further, in a vacuum welding furnace control system including a negative pressure suction module (9), a shield gas introduction pipe, a heating module, and a cooling module,
The output end of the control module is connected to the negative pressure suction module (9), the heating module, and the cooling module, respectively, and the side close to the supply end of the welding table (20) is the heating region, which is the welding table (20). The side close to the discharge end is the cooling region, and the negative pressure suction module (9) is installed above one end close to the cooling region in the heating region, and is installed on the furnace lid (4) so as to be able to move up and down, and is negative. The bottom of the pressure suction module (9) and the heating region form a sealed negative pressure chamber, the heating module is installed inside the heating region, and the cooling module is installed inside the cooling region.
The shield gas introduction pipe is installed in the welding chamber (18) or the furnace lid (4), communicates with the inside of the welding chamber (18), and the output end of the control module is connected to the switch of the shield gas introduction pipe.
A vacuum welding furnace control system characterized by this. 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 output ends of the control module are elevating mechanisms, respectively. Connected to the translation mechanism and the opening / closing mechanism, two transport bars (24) are symmetrically installed, and the central portion thereof is installed in the welding chamber (18), and the opening / closing mechanism has two transport bars (24) at the same time. ), And the translation mechanism is connected to the opening / closing mechanism and driven to move the opening / closing mechanism in a direction approaching or separating from the discharge end. The elevating mechanism is connected to the translation mechanism and is driven so as to elevate the translation mechanism. A plurality of support portions are provided on each of the transport bars (24), and a plurality of support portions are provided at both ends of the welding table (20). The evacuation port is provided, and the evacuation port has a one-to-one correspondence with the support part.
The vacuum welding furnace control system according to claim 1. Both ends of the welding chamber (18) are sealed by end covers (26), transfer ports (2601) are symmetrically installed on both sides of each end cover (26), and transfer bars (24). Is connected to the opening / closing mechanism through the transport port (2601), and the bottom of the end cover (26) and the welding table (20) are installed at intervals.
The vacuum welding furnace control system according to claim 2. A transport mounting arm (45) having a one-to-one correspondence with the transport bar (24) is provided on the lower side of the welding chamber (18), and both ends of the transport mounting arm (45) are of the transport bar (24) on the corresponding side. Connected to both ends, the opening and closing mechanism is connected to two transport mounting arms (45).
The vacuum welding furnace control system according to claim 2. The opening / closing mechanism includes a horizontally installed opening / closing guide plate (43) and an opening / closing power module, and the opening / closing guide plate (43) is installed between two transport bars (24) to provide an opening / closing guide plate (43). An opening / closing guide portion that is gradually inclined inward along the direction close to the discharge end is provided on both sides of 43), and is attached to the opening / closing guide portion on any of the lower sides of each transport bar (24). An opening / closing guide wheel (44) to be matched is attached, an opening / closing spring in a tension state is provided between the two transport bars (24), and the opening / closing power module is connected to the opening / closing guide plate (43) to form a control module. The output end is connected to the open / close power module, which drives the open / close guide plate (43) to move along a direction approaching or away from the discharge end.
The vacuum welding furnace control system according to claim 2. The elevating mechanism includes an elevating guide block (48) and a transport elevating cylinder (46), and is gradually inclined downward along a direction close to a discharge end on the upper side of the elevating guide block (48). A lift guide wheel is attached to the lower side of the translation mechanism, and the piston rod of the transport lift cylinder (46) is connected to the lift guide block (48) to output the control module. The ends are connected to the transport lift cylinder (46), which drives the lift guide block (48) to move along a direction approaching or away from the discharge end.
The vacuum welding furnace control system according to claim 2. Baffle plate mounting grooves (2602) are symmetrically installed on both sides of each end cover (26), and the plane on which the baffle plate mounting groove (2602) is located is perpendicular to the center line of the transport bar (24) and the baffle plate. The baffle plate (27) is slidably mounted in the mounting groove (2602), the baffle plate (27) is connected to the transport bar (24) so as to slide and seal, and the baffle plate (27) is connected. , Linked to the corresponding end cover (26) to seal the end of the welding chamber (18),
The vacuum welding furnace control system according to claim 3. A transport mounting arm (45) having a one-to-one correspondence with the transport bar (24) is provided on the lower side of the welding chamber (18), and both ends of the transport mounting arm (45) are of the transport bar (24) on the corresponding side. Connected to both ends, the opening and closing mechanism is connected to two transport mounting arms (45).
The vacuum welding furnace control system according to claim 3. The heating region includes a plurality of heating plates (30), and the cooling region includes a plurality of cooling plates (28).
The vacuum welding furnace control system according to claim 1. A heating module having an electric heating tube (31) is symmetrically installed on both sides of each of the heating plates (30), and a sensor mounting hole (3003) is installed in the center of the heating plate (30) to mount the sensor. The hole (3003) is a blind hole installed between two electric heating tubes (31), a temperature sensor (32) is mounted in the sensor mounting hole (3003), and the temperature sensor (32) is controlled. The input end of the module is connected and the output end of the control module is connected to the electric heating tube (31).
The vacuum welding furnace control system according to claim 9. Cooling modules having water supply passages (2802) are symmetrically installed on both sides of the cooling plate (28), and drainage passages (2803) communicating with two water supply passages (2802) are installed at at least one end of the cooling plate (28). The output end of the control module is connected to a switch in the water supply passage (2802).
The vacuum welding furnace control system according to claim 9. The shield gas introduction pipe includes a main nitrogen gas introduction pipe (5) and a sub-nitrogen gas introduction pipe (16), and the main nitrogen gas introduction pipe (5) is installed at both ends of the furnace lid (4). The sub-nitrogen gas introduction pipes (16) are symmetrically installed on both sides of the central portion of the furnace lid (4), and the exhaust ends of the main nitrogen gas introduction pipe (5) and the sub-nitrogen gas introduction pipe (16) are respectively. Communicating with the welding chamber (18), the output end of the control module is connected to the switches of the main nitrogen gas introduction pipe (5) and the sub-nitrogen gas introduction pipe (16), respectively.
The vacuum welding furnace control system according to claim 1. Intake plates (17) are symmetrically installed on both sides of the lower portion of the furnace lid (4), and an intake port (1701) that opens upward and is provided above the intake plate (17) surrounds the furnace lid (4) for intake air. A plurality of air jet holes (1702) forming a chamber and communicating the intake port (1701) and the welding chamber (18) are installed at intervals on the intake plate (17), and the auxiliary nitrogen gas introduction pipe (16) is provided. , Communicates with the air intake (1701),
The vacuum welding furnace control system according to claim 12. 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 bottom of the sealing plate (36) and the heating region form a closed negative pressure chamber, a negative pressure suction tube is connected to the negative pressure chamber, and the output end of the control module is a switch of the negative pressure suction tube and a negative pressure. Connected to each suction lifting cylinder (35),
The vacuum welding furnace control system according to claim 1. 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 piston rod is connected to the sealing plate (36) via the connecting pipe (37), the connecting pipe (37) communicates the negative pressure chamber and the negative pressure suction pipe, and the output end of the control module is the piston rod. Connected to,
The vacuum welding furnace control system according to claim 14. A purification module (59) is further included, and both the intake end and the exhaust end of the purification module (59) communicate with the welding chamber (18).
The vacuum welding furnace control system according to claim 1. The purification module (59) includes a purification box (61), a coil (67) and a strainer (64) installed in the purification box (61), and an intake end and an exhaust end are each a purification box (61). ), Strainers (64) are installed close to the exhaust end, the exhaust end is sealed, the coil (67) is connected to the circulation pump, and the coil (67) is connected via the circulation pump. ) Is filled with the coolant circulating in), a fan (65) is installed between the exhaust end of the septic box (61) and the welding chamber (18), and the output end of the control module is the motor input of the fan (65). Connected to the end and the switch of the circulation pump,
The vacuum welding furnace control system according to claim 16. The purification module (59) further includes fins (68) installed in the purification box (61).
The vacuum welding furnace control system according to claim 17. 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. A liquid storage cover discharge pipe (3301) is provided at the bottom of the cover (33).
The vacuum welding furnace control system according to claim 1. The control method of the vacuum welding furnace control system according to claim 1.
The control module controls the furnace lid (4) to cover the upper part of the welding chamber (18) and seal it, switch on the shield gas introduction pipe, and shield the inside of the welding chamber (18). Step 1001 in which the gas is controlled to be filled, the heating region is controlled to heat the sheet above it, and the cooling region is controlled to cool the sheet above it.
Step 1002, in which the transport mechanism (2) is controlled by the control module to transport a plurality of sheets from the supply end to the discharge end so as to convey a predetermined distance each time.
Each time the transfer mechanism (2) completes the transfer operation, the negative pressure suction module (9) is lowered to form a closed negative pressure chamber surrounded by the heating region, and negative pressure suction or negative pressure suction for a predetermined time is performed on the negative pressure chamber. Step 1003, which controls to perform the vacuum suction operation,
Step 1004, in which the control module controls the transport mechanism (2) to continue transporting the sheet to the discharge end after performing the negative pressure suction or vacuum suction operation.
including,
A control method for a vacuum welding furnace control system.

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