CN113385768A

CN113385768A - Special muffle-free brazing furnace for liquid cooling plate of new energy automobile power battery

Info

Publication number: CN113385768A
Application number: CN202110624515.9A
Authority: CN
Inventors: 陈荣贤; 史定春
Original assignee: Yancheng Hairong Furnace Technology Co ltd; Nabaichuan Holding Co ltd
Current assignee: Yancheng Hairong Furnace Technology Co ltd; Nabaichuan Holding Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-09-14

Abstract

The invention discloses a muffle-free brazing furnace special for a liquid cooling plate of a power battery of a new energy automobile, which has low manufacturing cost and good brazing effect, and comprises the following components: the automatic brazing machine comprises a rack, wherein an upper workpiece area, a brazing area, an air cooling area and a lower workpiece area are sequentially arranged on the rack from front to back, a chain circulating conveying device is arranged on the rack and penetrates through the upper workpiece area, the brazing area, the air cooling area and the lower workpiece area; the structure of the soldering zone comprises: the furnace body sets up furnace and heating device in the furnace body, furnace's front end and last district be linked together, furnace's rear end and air-cooled zone are linked together the inside nanometer insulation material that is provided with all around of furnace body the outside left and right sides of furnace body is provided with the nitrogen chamber respectively the upper end of nitrogen chamber is provided with brazing zone nitrogen pipe the bottom of nitrogen chamber is provided with nitrogen inlet, the nitrogen chamber is linked together through nitrogen inlet and furnace.

Description

Special muffle-free brazing furnace for liquid cooling plate of new energy automobile power battery

Technical Field

The invention relates to a brazing furnace, in particular to a muffle-free brazing furnace special for a liquid cooling plate of a power battery of a new energy automobile.

Background

The liquid cooling plate of the power battery of the new energy automobile needs to use a brazing furnace in the processing process to effectively connect products. The brazing furnace performs the brazing by utilizing the characteristic that the alloy melting point of the brazing filler metal is lower than the melting point of the metal material. The brazing filler metal is usually placed near or in the welding surfaces of the parts to be joined, aluminium brazing flux is applied between and on the surfaces of the parts, and the parts are heated under a certain inert gas shield to a temperature at which the brazing alloy melts but the part metal does not melt. The flux breaks the oxide film of the metal material, so that the surface diffusion is carried out between the molten metal and the unmelted metal, and after cooling, the metal bonding is formed between the solder metal and the contact surface of the component. The structure of the existing brazing furnace mainly comprises: the equipment comprises a rack and a conveying device arranged on the rack, wherein an upper part area, a brazing area, an air cooling area and a lower part area are sequentially and mainly arranged on the rack from front to back, and nitrogen pipes are arranged in the upper part area and a brazing furnace. When the existing brazing furnace works, a workpiece needing brazing is fed into the brazing furnace for brazing through conveying devices such as conveying rollers or conveying mesh belts, and then the workpiece enters an air cooling zone for cooling after brazing and then enters a workpiece discharging zone for discharging the workpiece. Because the working temperature is higher in the brazing area, the workpiece is easy to oxidize, and nitrogen is filled into a muffle in a hearth of the brazing area through a nitrogen pipe in the brazing process, so that high-temperature oxidation in the workpiece furnace is prevented. The existing brazing furnace is provided with a muffle in a hearth, so that the manufacturing cost is high, the use space is small, a heating device cannot directly heat a workpiece, the workpiece is low in heating speed and uneven in heating, and the temperature detection effect is not accurate enough; the conveying device adopts conveying rollers or conveying mesh belts, the manufacturing cost of the conveying rollers is high, workpieces are easy to deviate or scratch in the conveying process, the conveying mesh belts are easy to take out heat in the furnace in the conveying process, and the energy consumption is high; in nitrogen gas passed through the pipeline from the upper end of brazing zone and got into furnace, sealed effect was not good, and nitrogen gas runs off in the installation clearance between heating device and the furnace easily, influences the pure nitrogen level in the furnace, and then influences brazing effect and brazing quality.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the muffle-free brazing furnace special for the liquid cooling plate of the power battery of the new energy automobile is low in manufacturing cost and good in brazing effect.

In order to solve the technical problems, the invention adopts the technical scheme that: new energy automobile power battery liquid cooling board special use does not have muffle brazing furnace, includes: the automatic brazing machine comprises a rack, wherein an upper workpiece area, a brazing area, an air cooling area and a lower workpiece area are sequentially arranged on the rack from front to back, a chain circulating conveying device is arranged on the rack and penetrates through the upper workpiece area, the brazing area, the air cooling area and the lower workpiece area; the structure of the soldering zone comprises: the furnace comprises a furnace body, a hearth and a heating device, wherein the hearth and the heating device are arranged in the furnace body, the front end of the hearth is communicated with an upper workpiece area, the rear end of the hearth is communicated with an air cooling area, nano heat insulation materials are arranged inside the periphery of the furnace body, nitrogen cavities are respectively arranged on the left side and the right side of the outer part of the furnace body, a nitrogen pipe of a brazing area is arranged at the upper end of the nitrogen cavity, a nitrogen inlet is arranged at the bottom of the nitrogen cavity, and the nitrogen cavity is communicated with the hearth through the nitrogen inlet; the furnace body is characterized in that a plurality of first thermocouple temperature sensors, a plurality of second thermocouple temperature sensors and a plurality of third thermocouple temperature sensors are arranged at the upper end of the furnace body, the lower ends of the first thermocouple temperature sensors, the second thermocouple temperature sensors and the third thermocouple temperature sensors are deep into the furnace chamber, the setting depth of the lower end of the second thermocouple temperature sensor is lower than that of the lower end of the first thermocouple temperature sensor, and the setting depth of the lower end of the third thermocouple temperature sensor is lower than that of the lower end of the second thermocouple temperature sensor; the chain circulating conveyor device comprises: the automatic feeding device comprises a front transmission shaft, a rear transmission shaft, a transmission motor, a speed reducer and two circulating chains, wherein the front transmission shaft is arranged on an upper workpiece area, the rear transmission shaft is arranged on a lower workpiece area, the two circulating chains are arranged between the front transmission shaft and the rear transmission shaft, front transmission gears are arranged at two ends of the front transmission shaft respectively, rear transmission gears are arranged at two ends of the rear transmission shaft respectively, the transmission motor is connected with the speed reducer, a first transmission gear is arranged on a motor shaft of the speed reducer, and the first transmission gear is connected with a second transmission gear arranged at the end part of the rear transmission shaft through the transmission chains; two roll shafts are respectively arranged on the two circulating chains, and cover plates are arranged on the outer sides of the two roll shafts; the inside left and right sides of furnace body is fixed respectively and is provided with stainless steel track support frame be provided with the mounting panel on the stainless steel track support frame the mounting panel inboard is provided with the ceramic gib block stainless steel mounting panel medial extremity is provided with track installation piece and circulation chain backup pad be provided with two slide rails, two on the track installation piece slide rail and the circulation chain two the roller is mutually supported, the first half of circulation chain supports on two slide rails, the latter half of circulation chain supports in circulation chain backup pad, both ends support respectively in the front on drive gear and the back drive gear around the circulation chain, the circulation chain is located the furnace between last heating pipe and the lower heating pipe, and the support of work piece is on two circulation chains.

In order to better solve the technical problems, the invention adopts the further technical scheme that: the heating device includes: the middle part of the upper heating pipe is positioned in the hearth, two ends of the upper heating pipe are respectively positioned in the nitrogen cavity, and a sealing ring is arranged between the two ends of the upper heating pipe and the furnace body; the middle part of the lower heating pipe is positioned in the hearth, the two ends of the lower heating pipe are respectively positioned in the nitrogen cavity, and a sealing ring is arranged between the two ends of the lower heating pipe and the furnace body.

The invention has the advantages that: the muffle-free brazing furnace special for the new energy automobile power battery liquid cooling plate is used for brazing the new energy automobile power battery liquid cooling plate, a muffle and a conveying roller are not needed to be arranged in a hearth, the using space in the hearth is increased, and a heating device directly heats the new energy automobile power battery liquid cooling plate, so that a product is quickly and uniformly heated; the product is conveyed by adopting a rail supporting chain, so that the product can be effectively prevented from deviating or scratching in the conveying process, and the manufacturing and maintenance cost is reduced; the temperature in the hearth can be more accurately detected by arranging three thermocouple temperature sensors with different depths; be provided with the nitrogen gas protection chamber in furnace's both sides, heating device's outer end is located the nitrogen gas protection intracavity, and nitrogen gas passes through the nitrogen gas protection chamber then gets into the furnace inner wall through the pipeline, can prevent effectively that the interior nitrogen gas of furnace and heat from running off in the installation clearance between heating device and the furnace, guarantees the pure nitrogen level in the furnace to guarantee that the in-process product of brazing can not oxidize, guarantee the effect of brazing and the quality of brazing, practice thrift nitrogen gas consumption, it is safer to use.

Drawings

FIG. 1 is a schematic structural diagram of a muffle-free brazing furnace special for a liquid cooling plate of a power battery of a new energy automobile.

FIG. 2 is a schematic sectional structure view of a brazing area of the muffle-free brazing furnace special for the liquid-cooled plate of the new energy automobile power battery.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

FIG. 4 is a schematic structural diagram of a chain circulating conveying device in the muffle-free brazing furnace special for the liquid cooling plate of the new energy automobile power battery.

In the figure: 1. a frame, 2, an upper workpiece area, 3, a brazing area, 31, a furnace body, 32, a hearth, 33, nanometer heat insulation materials, 34, a nitrogen gas cavity, 35, a brazing area nitrogen pipe, 36, a nitrogen gas inlet, 4, an air cooling area, 5, a lower workpiece area, 61, an upper heating pipe, 62, a lower heating pipe, 63, an upper sealing ring, 64, a lower sealing ring, 71, a first thermocouple temperature sensor, 72, a second thermocouple temperature sensor, 73, a third thermocouple temperature sensor, 81, a front transmission shaft, 82, a rear transmission shaft, 83, a transmission motor, 84, a speed reducer, 85, a circulation chain, 811, a front transmission gear, 821, a rear transmission gear, 822, a second transmission gear, 841, a motor shaft, 842, a first transmission gear, 851, a roller shaft, 852, a cover plate, 86, a transmission chain, 9, a stainless steel rail support frame, 91, a mounting plate, 92, a ceramic guide strip, 93, a stainless steel rail support frame, a stainless steel support frame, a front transmission frame, a stainless steel support frame, a front transmission shaft, a rear, A rail mounting block 94, a circulating chain support plate 95, a sliding rail 10 and a workpiece.

Detailed Description

The details of the present invention are described below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, 2, 3 and 4, the muffle-free brazing furnace special for the liquid cooling plate of the power battery of the new energy automobile comprises: the automatic brazing machine comprises a rack 1, wherein an upper workpiece area 2, a brazing area 3, an air cooling area 4 and a lower workpiece area 5 are sequentially arranged on the rack 1 from front to back, and a chain circulating conveying device is arranged on the rack 1 and penetrates through the upper workpiece area 2, the brazing area 3, the air cooling area 4 and the lower workpiece area 5; the structure of the soldering zone 3 comprises: the furnace comprises a furnace body 31, a hearth 32 and a heating device, wherein the hearth 32 and the heating device are arranged in the furnace body 31, the front end of the hearth 32 is communicated with an upper workpiece area 2, the rear end of the hearth 32 is communicated with an air cooling area 4, nano heat insulation materials 33 are arranged inside the periphery of the furnace body 31, nitrogen cavities 34 are respectively arranged on the left side and the right side outside the furnace body 31, a brazing area nitrogen pipe 35 is arranged at the upper end of each nitrogen cavity 34, a nitrogen inlet 36 is arranged at the bottom of each nitrogen cavity 34, and each nitrogen cavity 34 is communicated with the hearth 32 through the nitrogen inlet 36; a plurality of first thermocouple temperature sensors 71, a plurality of second thermocouple temperature sensors 72 and a plurality of third thermocouple temperature sensors 73 are arranged at the upper end of the furnace body 31, the lower ends of the first thermocouple temperature sensors 71, the second thermocouple temperature sensors 72 and the third thermocouple temperature sensors 73 are deep into the furnace 32, the setting depth of the lower end of the second thermocouple temperature sensor 72 is smaller than that of the lower end of the first thermocouple temperature sensor 71, and the setting depth of the lower end of the third thermocouple temperature sensor 73 is smaller than that of the lower end of the second thermocouple temperature sensor 72; the chain circulating conveyor device comprises: the automatic feeding device comprises a front transmission shaft 81 arranged on the upper part area 2, a rear transmission shaft 82 arranged on the lower part area 5, a transmission motor 83, a speed reducer 84 and two circulating chains 85 arranged between the front transmission shaft 81 and the rear transmission shaft 82, wherein front transmission gears 811 are respectively arranged at two ends of the front transmission shaft 81, rear transmission gears 821 are respectively arranged at two ends of the rear transmission shaft 82, the transmission motor 83 is connected with the speed reducer 84, a motor shaft 841 of the speed reducer 84 is provided with a first transmission gear 842, and the first transmission gear 842 is connected with a second transmission gear 822 arranged at the end part of the rear transmission shaft 82 through a transmission chain 86; two roll shafts 851 are respectively arranged on the two circulating chains 85, and a cover plate 852 is arranged outside the two roll shafts 851; the stainless steel track support frames 9 are respectively and fixedly arranged at the left side and the right side in the furnace body 31, the mounting plate 91 is arranged on the stainless steel track support frame 9, the ceramic guide strip 92 is arranged at the inner side of the mounting plate 91, the track mounting block 93 and the circulating chain support plate 94 are arranged at the inner side end part of the stainless steel mounting plate 91, the two slide rails 95 are arranged on the track mounting block 93, the two slide rails 95 are matched with the two roll shafts 851 on the circulating chain 85, the upper half part of the circulating chain 85 is supported on the two slide rails 95, the lower half part of the circulating chain 85 is supported on the circulating chain support plate 91, the front end and the rear end of the circulating chain 85 are respectively supported on the front transmission gear 811 and the rear transmission gear 821, and the circulating chain 85 is positioned in the hearth 32 between the upper heating pipe 61 and the lower heating pipe 62, the work 10 is supported on two endless chains 85.

In this embodiment, the heating device includes: the heating furnace comprises a plurality of upper heating pipes 61 and a plurality of lower heating pipes 62, wherein the middle parts of the upper heating pipes 61 are positioned in a hearth 32, two ends of the upper heating pipes 61 are respectively positioned in a nitrogen chamber 34, and sealing rings 63 are arranged between two ends of the upper heating pipes 61 and a furnace body 31; the middle part of the lower heating pipe 62 is positioned in the hearth 32, two ends of the lower heating pipe 62 are respectively positioned in the nitrogen chamber 36, and a sealing ring 64 is arranged between two ends of the lower heating pipe 62 and the furnace body 31;

above-mentioned special no muffle furnace of brazing work of new energy automobile power battery liquid cooling board, work piece 10 that need braze is at last zone 2 upper parts, carry through chain circulation conveyor, get into zone 3 of brazing and braze, last heating pipe 61 in the zone 3 of brazing and lower heating pipe 62 carry out even rapid heating to work piece 10, first thermocouple temperature sensor 71, second thermocouple temperature sensor 72 and third thermocouple temperature sensor 73 carry out accurate detection to the temperature in furnace 32, it cools off to get into air-cooled zone 4 after the completion of brazing, then get into zone 5 lower parts down.

Protective gas nitrogen enters the nitrogen chamber 34 through a nitrogen pipe 35 of the brazing area and then enters the hearth 32 through a nitrogen inlet 36, so that the atmosphere in the whole hearth 32 is ensured to be pure nitrogen, the high-temperature oxidation of the workpiece 10 in the brazing process is prevented, and the product quality is ensured.

Put into the transport on two circulation chains 85 of chain endless conveyor with work piece 10, in transportation process, the ceramic gib block 92 of setting in work piece 10 both sides can prevent transportation process work piece 10 off tracking, guarantees conveying quality, and chain endless conveyor's theory of operation is: the transmission motor 83 drives the speed reducer 84, a first transmission gear 842 is arranged on a motor shaft 841 of the speed reducer 84, the first transmission gear 842 drives the second transmission gear 822 at the end part and the rear transmission shaft 82 to rotate through the transmission chain 86, and the rear transmission gear 821 on the rear transmission shaft 82 drives the front transmission gear 811 and the front transmission shaft 81 to rotate through the circulation chain 85, so that the two circulation chains 85 rotate circularly, and the workpiece 10 is conveyed uninterruptedly.

The above embodiments are provided for illustrative purposes only and are not intended to limit the present invention, and those skilled in the art may make various changes and modifications without departing from the scope of the present invention, and all technical solutions identical or similar to the present invention shall fall within the protection scope of the present invention.

The muffle-free brazing furnace special for the new energy automobile power battery liquid cooling plate is used for brazing the new energy automobile power battery liquid cooling plate, a muffle and a conveying roller are not needed to be arranged in a hearth, the using space in the hearth is increased, and a heating device directly heats the new energy automobile power battery liquid cooling plate, so that a product is quickly and uniformly heated; the product is conveyed in a rail supporting chain mode, so that the product can be effectively prevented from deviating or scratching in the conveying process, and the manufacturing and maintenance cost is reduced; the temperature in the hearth can be more accurately detected by arranging three thermocouple temperature sensors with different depths; be provided with the nitrogen gas protection chamber in furnace's both sides, heating device's outer end is located the nitrogen gas protection intracavity, and nitrogen gas passes through the nitrogen gas protection chamber then gets into the furnace inner wall through the pipeline, can prevent effectively that the interior nitrogen gas of furnace and heat from running off in the installation clearance between heating device and the furnace, guarantees the pure nitrogen level in the furnace to guarantee that the in-process product of brazing can not oxidize, guarantee the effect of brazing and the quality of brazing, practice thrift nitrogen gas consumption, it is safer to use.

Claims

1. New energy automobile power battery liquid cooling board special use does not have muffle brazing furnace, includes: frame (1) is gone up in the past and is set gradually after to and has gone up a district (2), brazing district (3), air-cooled district (4) and lower district (5), its characterized in that: a chain circulating conveying device is arranged on the rack (1) and penetrates through the upper workpiece area (2), the brazing area (3), the air cooling area (4) and the lower workpiece area (5); the structure of the soldering zone (3) comprises: the furnace comprises a furnace body (31), a hearth (32) and a heating device, wherein the hearth (32) and the heating device are arranged in the furnace body (31), the front end of the hearth (32) is communicated with an upper part area (2), the rear end of the hearth (32) is communicated with an air cooling area (4), nano heat-insulating materials (33) are arranged inside the periphery of the furnace body (31), nitrogen chambers (34) are respectively arranged on the left side and the right side of the outside of the furnace body (31), a brazing area nitrogen pipe (35) is arranged at the upper end of each nitrogen chamber (34), a nitrogen inlet (36) is arranged at the bottom of each nitrogen chamber (34), and each nitrogen chamber (34) is communicated with the hearth (32) through the nitrogen inlet (36); the upper end of the furnace body (31) is provided with a plurality of first thermocouple temperature sensors (71), a plurality of second thermocouple temperature sensors (72) and a plurality of third thermocouple temperature sensors (73), the lower ends of the first thermocouple temperature sensors (71), the second thermocouple temperature sensors (72) and the third thermocouple temperature sensors (73) are deep into the furnace chamber (32), the setting depth of the lower ends of the second thermocouple temperature sensors (72) is lower than that of the lower ends of the first thermocouple temperature sensors (71), and the setting depth of the lower ends of the third thermocouple temperature sensors (73) is lower than that of the lower ends of the second thermocouple temperature sensors (72); the chain circulating conveyor device comprises: the automatic feeding device comprises a front transmission shaft (81), a rear transmission shaft (82), a transmission motor (83), a speed reducer (84) and two circulating chains (85), wherein the front transmission shaft (81), the rear transmission shaft (82), the transmission motor (83), the speed reducer (84) and the two circulating chains (85) are arranged in an upper workpiece area (2) and a lower workpiece area (5), the front transmission gear (811) is arranged at each of two ends of the front transmission shaft (81), the rear transmission gear (821) is arranged at each of two ends of the rear transmission shaft (82), the transmission motor (83) is connected with the speed reducer (84), a first transmission gear (842) is arranged on a motor shaft (841) of the speed reducer (84), and the first transmission gear (842) is connected with a second transmission gear (822) arranged at the end part of the rear transmission shaft (82) through the transmission chain (86); two roll shafts (851) are respectively arranged on the two circulating chains (85), and cover plates (852) are arranged on the outer sides of the two roll shafts (851); the left side and the right side in the furnace body (31) are respectively and fixedly provided with a stainless steel track support frame (9), the stainless steel track support frame (9) is provided with a mounting plate (91), the inner side of the mounting plate (91) is provided with a ceramic guide strip (92), the inner side end of the stainless steel mounting plate (91) is provided with a track mounting block (93) and a circulating chain support plate (94), the track mounting block (93) is provided with two slide rails (95), the two slide rails (95) are matched with two roll shafts (851) on a circulating chain (85), the upper half part of the circulating chain (85) is supported on the two slide rails (95), the lower half part of the circulating chain (85) is supported on the circulating chain support plate (91), and the front end and the rear end of the circulating chain (85) are respectively supported on a front transmission gear (811) and a rear transmission gear (821), the circulating chains (85) are positioned in a hearth (32) between the upper heating pipe (61) and the lower heating pipe (62), and the workpieces (10) are supported on the two circulating chains (85).

2. The special muffle-free brazing furnace for the liquid cooling plate of the new energy automobile power battery according to claim 1, wherein the special muffle-free brazing furnace comprises: the heating device includes: the heating furnace comprises a plurality of upper heating pipes (61) and a plurality of lower heating pipes (62), wherein the middle parts of the upper heating pipes (61) are positioned in a hearth (32), two ends of the upper heating pipes (61) are respectively positioned in a nitrogen chamber (34), and sealing rings (63) are arranged between two ends of the upper heating pipes (61) and a furnace body (31); the middle part of the lower heating pipe (62) is positioned in the hearth (32), two ends of the lower heating pipe (62) are respectively positioned in the nitrogen chamber (36), and a sealing ring (64) is arranged between two ends of the lower heating pipe (62) and the furnace body (31).