CN114669815B - PPTC protector processing equipment for power type battery and production process - Google Patents
PPTC protector processing equipment for power type battery and production process Download PDFInfo
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- CN114669815B CN114669815B CN202210348672.6A CN202210348672A CN114669815B CN 114669815 B CN114669815 B CN 114669815B CN 202210348672 A CN202210348672 A CN 202210348672A CN 114669815 B CN114669815 B CN 114669815B
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- 101000669528 Homo sapiens Tachykinin-4 Proteins 0.000 title claims abstract description 28
- OKUGPJPKMAEJOE-UHFFFAOYSA-N S-propyl dipropylcarbamothioate Chemical compound CCCSC(=O)N(CCC)CCC OKUGPJPKMAEJOE-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 102100039365 Tachykinin-4 Human genes 0.000 title claims abstract description 28
- 230000001012 protector Effects 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 238000003466 welding Methods 0.000 claims abstract description 19
- 238000005476 soldering Methods 0.000 claims description 72
- 238000000034 method Methods 0.000 claims description 20
- 238000003860 storage Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 18
- 229910000679 solder Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000007790 scraping Methods 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 24
- 239000007789 gas Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011093 chipboard Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/012—Soldering with the use of hot gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0016—Brazing of electronic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/06—Solder feeding devices; Solder melting pans
- B23K3/0646—Solder baths
- B23K3/0669—Solder baths with dipping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/06—Solder feeding devices; Solder melting pans
- B23K3/0646—Solder baths
- B23K3/0669—Solder baths with dipping means
- B23K3/0676—Conveyors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/085—Cooling, heat sink or heat shielding means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The application relates to a processing device and a production process of a PPTC protector for a power battery, and relates to the field of battery protectors. When the die moves to the upper part of the supporting plate, the die descends to enable the lower end face to be in contact with the liquid tin, so that the workpiece is heated by more than 300 degrees, and the welding effect is improved.
Description
Technical Field
The application relates to the field of battery protectors, in particular to a processing device and a production process of a PPTC protector for a power battery.
Background
PPTC, a high molecular polymer positive temperature coefficient element, also known as a resettable fuse, is commonly known in the industry as a self-healing fuse or overcurrent protection sheet. PPTC exhibits a low resistance under normal conditions, and under an overcurrent fault, its resistance rises sharply to achieve protection, and since it has excellent restorable characteristics, the circuit can automatically return to the on state after the fault is eliminated.
In the current PPTC processing process, a chip board of the PPTC needs to be welded with a positive plate and a negative plate, generally, dispensing of solder paste is carried out on a die, then wave soldering or reflow soldering is utilized for welding according to the characteristics of elements, and workpieces need to be at a high temperature of more than 300 ℃ in the process so as to ensure the welding effect. Generally, for a sheet component without pins, a reflow soldering mode is mainly utilized to process, a workpiece enters a welding machine from a feeding hole of the welding machine, and the workpiece is separated from a discharging hole after preheating, constant temperature, reflow and cooling.
In view of the above-mentioned related art, the inventors believe that during reflow soldering, gas is mainly used for heating, the gas fluidity is high, the heat loss at the feed inlet and discharge port is high, the peak temperature is about 250-300 ℃, the requirement of 300 ℃ or more is difficult to be reached, the soldered workpiece is easy to fall off, separate and the like, and the soldering effect is poor.
Disclosure of Invention
In order to improve the welding effect, the application provides a processing device and a production process of a PPTC protector for a power battery.
In a first aspect, the present application provides a PPTC protector processing apparatus for a power battery, which adopts the following technical scheme:
the utility model provides a PPTC protector processing equipment for power type battery, includes the casing, casing length direction's both ends all are equipped with the reflow soldering section, be equipped with the dip soldering case that is used for holding liquid tin between two reflow soldering sections, dip soldering case upper end opening, dip soldering case all is equipped with the guide rail that is used for placing the mould along casing length direction's both sides, the height of guide rail is higher than the height of dip soldering case, the guide rail all sets up along the length direction of casing, be equipped with the driving piece that is used for promoting the mould to remove along casing length direction in the casing, along vertical direction sliding connection there being the lifter in the casing, the upper end of lifter is equipped with the backup pad, the backup pad communicates the guide rail of dip soldering case both sides, the mould adopts the difficult material of tin of being stained with.
Through adopting above-mentioned technical scheme, the user adds the liquid tin of high temperature more than 300 degrees to the dip soldering incasement, then place the mould in casing length direction's one end, drive the mould by the driving piece and remove to the casing other end, preheat under the effect of the reflow soldering section of casing corresponding tip, when the mould moved to the backup pad top, the driving piece was paused, the lifter drove backup pad and mould decline, the lower terminal surface and the liquid tin contact of mould, compare the air, the mobility of liquid tin is relatively poor, the heat loss rate is slower, can make the work piece heated more than 300 degrees, and then improved welded effect.
Optionally, the driving piece includes two chains, and two chains all set up along the length direction of casing, and the chain is located the guide rail top, and the dip soldering case is located between two chains, is connected with a plurality of push rods that are used for promoting the mould between two chains.
Through adopting above-mentioned technical scheme, the chain drives the push rod and removes, and the user is placed the mould between two chains, and the push rod promotes the mould and removes along the length direction of casing on the guide rail, simple structure control is convenient.
Optionally, a plurality of tool frames for supporting the die are arranged between the two chains, the tool frames are distributed along the length direction of the shell, and the tool frames are made of materials which are not easy to be stained with tin.
Through adopting above-mentioned technical scheme, the frock frame supports the mould, and the mould removes the in-process, and frock frame takes place relative slip with the guide rail, is difficult for causing the damage to the mould, is favorable to prolonging the life of mould.
Optionally, the one end of casing length direction is equipped with the frame of keeping in that is used for stacking the frock frame, and the frame of keeping in is located between two chains, and the feed inlet with frock frame size adaptation has been seted up to the frame lower extreme of keeping in.
Through adopting above-mentioned technical scheme, the user can stack the frock frame that holds the mould in the frame of keeping in, and the pushing action of push rod is automatic to be released the frock frame of lower side from the feed opening department, realizes automatic feeding, simple structure degree of automation is high.
Optionally, two first cylinders are fixedly arranged in the shell, the positions of the first cylinders and the lifting rods are in one-to-one correspondence, and the output ends of the first cylinders are fixedly connected with the corresponding lifting rods.
Through adopting above-mentioned technical scheme, flexible in first cylinder output can control the lifting of frock frame in backup pad and the backup pad, is convenient for remove the frock frame to the dip soldering incasement heating welding, simple structure control is convenient.
Optionally, be equipped with the axis of rotation in the casing, axis of rotation fixedly connected with two cams, the position one-to-one of cam and lifter, the lower tip and the cam butt that corresponds of lifter.
Through adopting above-mentioned technical scheme, the axis of rotation rotates and drives and link cam synchronous rotation, and the lifter is higher with the cam when the nearer partial butt of axis of rotation, and otherwise highly higher, the rotation of cam drives the periodic cycle of lifter and goes up and down, simple structure control is convenient.
Optionally, the dip soldering case sliding connection has the scraper blade, and the scraper blade level sets up and is located the upper end of dip soldering case.
Through adopting above-mentioned technical scheme, the user controls the liquid tin's liquid level and the lower terminal surface of scraper blade to be in same height, and the control scraper blade at intervals removes in the dip soldering case, can strickle the liquid tin's liquid level, can strike off the partial tin that liquid level department solidifies simultaneously, makes liquid tin all have better heating effect to the work piece of different positions, and then improves the welding effect of work piece.
Optionally, both ends of the length direction of the supporting plate are in downward bending arc shapes.
Through adopting above-mentioned technical scheme, the arc part at backup pad both ends can reduce the error between backup pad and the guide rail, and the frock frame is difficult for being influenced processing by the edge obstruction of backup pad when removing to the backup pad, has improved process stability.
Optionally, the upper end of the casing is hinged with a safety cover, and the edge of the safety cover is provided with a heat preservation piece.
Through adopting above-mentioned technical scheme, the user can open the operation such as safety lid maintains the casing inside, and the heat preservation piece can reduce the loss of safety lid edge heat in the course of working, improves the holistic heat preservation effect of casing, and then is favorable to improving the welding effect.
In a second aspect, the application provides a production process of a PPTC protector, comprising the following steps:
s1, cutting a chip: cutting the positive plate, the chip plate and the negative plate into required shapes respectively;
s2, dispensing solder paste: sequentially placing the positive plate, the chip plate and the negative plate into a mold, and injecting solder paste between the positive plate and the chip plate and between the chip plate and the negative plate;
s3, mounting a tool frame: placing a die with a workpiece in a tool rack, stacking a plurality of tool racks in a temporary storage rack, and abutting the tool rack at the lowest position with a machine shell;
s4, heating and welding: the tool frame automatically moves into the machine shell along with the driving piece, the reflow soldering section carries out preliminary heating, the lifting rod drives the tool frame to descend, and after the die is directly contacted with high-temperature liquid tin for a period of time, the lifting rod drives the tool frame to ascend, and the driving piece controls the tool frame to move out of the machine shell.
Through adopting above-mentioned technical scheme, the work piece moves to the dip soldering incasement along with mould and frock frame to by the liquid tin of high temperature heats, compares in the gas heating of simple reflow soldering, and the heat loss in the liquid tin is less, and then realizes the heating welding more than 300 degrees, has improved the welding effect.
In summary, the present application includes at least one of the following beneficial technical effects:
the method comprises the steps that a user adds high-temperature liquid tin with the temperature of more than 300 ℃ into a dip soldering box, then a die is arranged at one end of the machine shell in the length direction, the die is driven to move towards the other end of the machine shell by a driving piece, preheating is carried out under the action of a reflow soldering section of the corresponding end part of the machine shell, when the die moves to the position above a supporting plate, the driving piece is suspended, a lifting rod drives the supporting plate and the die to descend, the lower end face of the die is contacted with the liquid tin, and compared with air, the liquid tin has poorer fluidity and slower heat loss speed, so that a workpiece can be heated by more than 300 ℃, and the soldering effect is improved;
the user controls the liquid level of the liquid tin to be at the same height with the lower end surface of the scraping plate, controls the scraping plate to move in the dip soldering box at intervals, can scrape the liquid level of the liquid tin, and can scrape part of solidified tin at the liquid level, so that the liquid tin has better heating effect on workpieces at different positions, and further improves the welding effect of the workpieces;
the heat preservation piece can reduce the heat loss of the safety cover edge in the processing process, improves the integral heat preservation effect of the shell, and is further beneficial to improving the welding effect.
Drawings
Fig. 1 is a schematic diagram showing the overall structure of a PPTC protector manufacturing apparatus for a power type battery according to the present application.
Fig. 2 is a partial schematic view showing the internal structure of an embodiment 1 of a PPTC protector process apparatus for a power battery.
Fig. 3 is an enlarged schematic view of the portion a in fig. 2.
Fig. 4 is a partial schematic view showing the internal structure of example 2 of a PPTC protector process apparatus for a power battery.
Fig. 5 is a flow chart of a PPTC protector manufacturing process of the present application.
Reference numerals illustrate: 1. a housing; 11. a reflow soldering section; 12. a dip soldering box; 13. a safety cover; 14. a thermal insulation member; 2. a guide rail; 3. a driving member; 31. a chain; 32. a push rod; 4. a lifting rod; 41. a support plate; 42. a first cylinder; 5. a tool rack; 51. rectangular frames; 52. a connecting rod; 6. a temporary storage rack; 61. a feeding port; 7. a scraper; 71. a second cylinder; 8. a rotating shaft; 81. a cam.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings.
The embodiment of the application discloses a PPTC protector processing device for a power battery.
Example 1:
referring to fig. 1, a PPTC protector processing apparatus for a power battery includes a case 1, the case 1 having a strong heat insulating ability so that the inside and outside of the case 1 have less heat exchange. Two reflow soldering sections 11 are arranged in the machine shell 1, a dip soldering box 12 is arranged between the two reflow soldering sections 11, one end of the machine shell 1 in the length direction is set as a feeding end, and the other end is set as a discharging end; the casing 1 is provided with a driving piece 3, the driving piece 3 drives a workpiece to enter the casing 1 from a feeding end, and the workpiece is separated from the casing 1 after sequentially passing through a first reflow soldering section 11, a dip soldering box 12 and another reflow soldering section 11, so that heating soldering is finished.
Referring to fig. 1 and 2, since the workpiece is small, a user needs to place the workpiece to be welded in a corresponding mold before processing, and the mold is rectangular and flat. The processing equipment further comprises a plurality of tool frames 5, each tool frame 5 comprises two rectangular frames 51, the two rectangular frames 51 are arranged up and down, a plurality of connecting rods 52 are fixedly connected between the two rectangular frames 51, a space larger than the thickness of the die is reserved between the two rectangular frames 51, a user places the die with the workpiece placed on the die between the two rectangular frames 51 of the tool frames 5, one tool frame 5 can arrange and place three dies at the same time, and the tool frames 5 serve as the die and the workpiece carrier to enter the machine shell 1 for processing.
Referring to fig. 1, a user moves a plurality of tool frames 5 with molds and workpieces mounted thereon to a housing 1 for welding, a temporary storage frame 6 is mounted above a feed end of the housing 1, a space with an area adapted to the tool frames 5 is reserved in the temporary storage frame 6, the user places the tool frames 5 in the space, and the tool frames 5 are vertically stacked and discharged in the temporary storage frame 6 under the action of gravity for temporary storage.
Referring to fig. 1 and 2, horizontal guide rail 2 is all installed at the both ends of casing 1 length direction, two guide rails 2 all extend to casing 1 inside along the length direction of casing 1, guide rail 2 is the "U" shape of being made by the channel-section steel welding, and open-ended one end is located casing 1, the interval is great and with the width adaptation of frock frame 5 in the tip width direction both sides interval on guide rail 2, the interval of lower tip is less than the width of frock frame 5, the butt of frock frame 5 of the interior bottommost of temporary storage frame 6 is on the guide rail 2 near the feed end, guide rail 2 provides the support to frock frame 5, restriction frock frame 5 is along the removal of casing 1 width direction, frock frame 5 is difficult for dropping to the guide rail 2 below. The lower end of the temporary storage frame 6 is provided with a feeding hole 61 along two sides of the length direction of the casing 1, and the tool frame 5 automatically moves from the feeding hole 61 into the casing 1 one by one along the length direction of the guide rail 2 under the action of the driving piece 3.
Referring to fig. 2, the driving member 3 includes two chains 31 parallel to each other, the upper ends of the two chains 31 are located in the guide rail 2, the tool frame 5 on the guide rail 2 is located between the two chains 31, the casing 1 is provided with a first motor for driving the two chains 31 to rotate synchronously, and the first motor is in a start state to drive the two chains 31 to rotate synchronously during processing, and the upper ends of the two chains 31 are all conveyed from the feeding end to the discharging end. A plurality of push rods 32 are fixedly connected between the two chains 31, the push rods 32 are arranged along the width direction of the casing 1, and the two chains 31 drive the push rods 32 to move along the length direction of the casing 1.
Referring to fig. 1, both the push rod 32 and the tool rack 5 can pass through the feeding port 61, the push rod 32 at the feeding end is in contact with the tool rack 5 at the lowest part of the temporary storage rack 6 through the feeding port 61, so as to push the tool rack 5 to move out of the temporary storage rack 6 from the other feeding port 61, and after the tool rack 5 is completely separated from the temporary storage rack 6, the rest of the tool racks 5 in the temporary storage rack 6 automatically fall down and fall on the guide rail 2 again; the push rods 32 are arranged at equal intervals along the length direction of the chain 31, namely, in the process of rotating the chain 31, the push rods 32 push out one tool frame 5 from the temporary storage frame 6 at intervals, and automatically push into the machine shell 1, so that the tool frames 5 are not required to be manually sent into the machine shell 1 in sequence, and the degree of automation is high.
Referring to fig. 1, a reflow soldering section 11 is a common reflow soldering machine structure, the reflow soldering section 11 near to a feeding end blows high-temperature air or nitrogen gas up and down to a tool frame 5 at the same time, a workpiece at the stage is gradually heated to realize reflow soldering, and the tool frame 5 gradually moves to a dip soldering box 12 along a guide rail 2.
Referring to fig. 1, the dip soldering box 12 is filled with high-temperature liquid tin, the temperature of the liquid tin can be controlled to be maintained above 300 ℃ by the machine shell 1 by using a heating wire (not shown in the figure) and other modes, compared with gas, the liquid tin has poorer fluidity and is far away from the feed inlet and the feed outlet at two ends of the machine shell 1, the heat in the liquid tin is not easy to run off, the height of the dip soldering box 12 is lower than the height of the guide rail 2 and the upper end of the guide rail is open, and the tool frame 5 can be lowered into the dip soldering box 12 for ensuring the heating effect.
Referring to fig. 2, lifting rods 4 are mounted on both sides of the dip soldering tank 12 along the width direction of the casing 1, the lifting rods 4 are in sliding connection with the casing 1 along the vertical direction, first air cylinders 42 are mounted on the lower end parts of the two lifting rods 4, the cylinder bodies of the first air cylinders 42 are fixedly connected with the casing 1, and the output ends of the first air cylinders 42 are fixedly connected with the corresponding lifting rods 4; in a natural state, the output end of the first air cylinder 42 is in an extension state, and the height of the lifting rod 4 is higher; the upper end of the lifting rod 4 is fixedly provided with a supporting plate 41, at the moment, the supporting plate 41 is communicated with the two guide rails 2, and the tool frame 5 moves onto the supporting plate 41 along with the chain 31.
Referring to fig. 3, if the height of the supporting plate 41 is slightly higher than the height of the guide rail 2, the movement of the tool frame 5 from the guide rail 2 to the supporting plate 41 is easily affected, both ends of the supporting plate 41 are in a downward bending arc shape, and further the tool frame 5 is guided, so that the tool frame 5 can smoothly move to the supporting plate 41 and is supported by the supporting plate 41, at this moment, the tool frame 5 is positioned right above the dip soldering box 12, and at this moment, the supporting plate 41 descends to drive the corresponding tool frame 5 to descend into the dip soldering box 12.
Referring to fig. 2, the chain 31 temporarily stops rotating, and simultaneously the output ends of the first air cylinders 42 below the two lifting rods 4 synchronously descend, so that the lifting rods 4 drive the supporting plate 41 to descend, the two guide rails 2 are not communicated any more, the tool frame 5 is lowered, the lower end part of the tool frame 5 is immersed in liquid tin, meanwhile, the die floats on the surface of the liquid tin, and the heat of the liquid tin rapidly heats the workpiece at a high temperature of 300 ℃ or more, so that the welding capability is guaranteed.
Referring to fig. 2, after the mold floats on the surface of the liquid tin for a certain time, the first air cylinders 42 of the two lifting rods 4 ascend synchronously, and the supporting plate 41 is controlled to drive the tool frame 5 to ascend, so that the mold is separated from the liquid tin; the die and the tool frame 5 are made of aluminum materials which are not easy to be stained with tin, and liquid tin is not easy to adhere to the outside of the dip soldering box 12. After the supporting plate 41 is restored to be communicated with the two guide rails 2, the two chains 31 simultaneously restore to rotate, so that the pushing plate is driven to push the tool frame 5 on the supporting plate 41 into the reflow soldering section 11 close to the discharge end, and meanwhile, the next tool frame 5 moves to the upper part of the dip soldering box 12 to repeat the operation.
Referring to fig. 1, the tool holder 5 moves in the reflow soldering section 11 near the discharge end, and moves from the discharge end to the outside of the casing 1 after gradually cooling, and a user removes the tool holder 5 at the discharge end to complete soldering.
Referring to fig. 2, the liquid tin at the liquid level in the dip soldering tank 12 is easy to partially solidify during the contact process with the tool frame 5 and the mold, and needs to be cleaned in time to ensure the heating effect on the subsequent workpieces. Install scraper 7 along casing 1 width direction setting in the dip soldering box 12, the lower terminal surface of scraper 7 is in same altitude department with the liquid tin's liquid level, casing 1 fixed mounting has second cylinder 71, the output and the scraper 7 fixed connection of second cylinder 71, during the processing, the output of second cylinder 71 is periodic flexible, every three frock frame 5 accomplish the heating in dip soldering box 12, the output of second cylinder 71 is flexible once, scrape the tin that liquid level department solidifies, the tin that solidifies melts again under the heating effect, and then ensure the effect of heating welded.
Referring to fig. 1, the upper end of the casing 1 is hinged with a safety cover 13, the edge of the safety cover 13 is provided with a heat-insulating piece 14, the heat-insulating piece 14 adopts a silica gel sealing gasket with a nano high temperature, the safety cover 13 is in a closed state during processing, and the heat loss from the gap of the safety cover 13 in the casing 1 is reduced under the action of the heat-insulating piece 14; the user can turn over the safety cover 13 along the hinge position of the safety cover and the machine shell 1 when needed, so as to carry out operations such as maintenance, service and the like, and the safety cover is simple in structure and convenient to use.
The implementation principle of the embodiment 1 of the application is as follows: the user places frock frame 5 in the feed end, drives push pedal drive frock frame 5 by chain 31 and removes to the casing 1 other end, preheats in the reflow soldering section 11 department that is close to the feed end, and when the mould moved to backup pad 41 top, driving piece 3 was paused, and lifter 4 drove backup pad 41 and mould and descends, and the lower terminal surface of mould heats with liquid tin contact, compares the air, and liquid tin's mobility is relatively poor, and the heat loss rate is slower, can make the work piece heated more than 300 degrees, and then has improved the welded effect.
Example 2:
referring to fig. 4, the present embodiment is mainly different from embodiment 1 in that: the lower end of the casing 1 is rotationally connected with a rotating shaft 8, the casing 1 is fixedly provided with a second motor, an output shaft of the second motor is fixedly connected with the rotating shaft 8 coaxially, and the second motor is in a starting state during processing to drive the rotating shaft 8 to rotate. The rotating shaft 8 is fixedly provided with two cams 81, the two cams 81 correspond to the positions of the two lifting rods 4 one by one, the lower end parts of the lifting rods 4 are in butt joint with the corresponding cams 81, and when the tool frame 5 moves onto the supporting plate 41, the cams 81 rotate to the position with smaller radial direction to be in butt joint with the lifting rods 4 so as to drive the tool frame 5 to descend into the dip soldering box 12; otherwise, the fixture support 5 is driven to ascend, and the structure is simple and the control is convenient.
The embodiment of the application also discloses a production process of the PPTC protector.
Referring to fig. 5, a process for producing a PPTC protector includes the steps of:
s1, cutting a chip: the user uses the punching machine to cut and punch the positive plate, the chip plate and the negative plate into circular rings respectively;
s2, dispensing solder paste: the user horizontally places the die, places the positive plate in the die, and spot-coats the solder paste on the positive plate, then covers the chip plate on the solder paste of the positive plate and compresses tightly, then spot-coats the solder paste on the chip plate, and finally covers the negative plate on the solder paste of the chip plate and compresses tightly, thereby improving the attaching effect;
s3, mounting the tool frame 5: the user places the die with the workpiece in the interval between the two rectangular frames 51 of the tool frames 5, horizontally places three dies in each tool frame 5, and then stacks a plurality of tool frames 5 in the temporary storage frame 6 for temporary storage;
s4, heating and welding: in the process of rotating the chain 31, at intervals, the push rod 32 pushes out one tool frame 5 from the temporary storage frame 6 and automatically pushes into the machine shell 1, the part of the reflow soldering section 11 close to the feeding end is preheated, after the tool frame 5 moves onto the supporting plate 41, the lifting rod 4 drives the supporting plate 41 and the tool frame 5 to descend, the die enters the dip soldering box 12 and floats on liquid tin, after the die is directly contacted with the high-temperature liquid tin for a period of time, the lifting rod 4 drives the tool frame 5 to ascend, the driving piece 3 controls the tool frame 5 to move out of the machine shell 1, and after the cooling effect of the other reflow soldering section 11 is achieved under the pushing of the push plate, the tool frame is moved out of the machine shell 1 to finish soldering.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (7)
1. A PPTC protector process device for a power cell comprising a housing (1), characterized in that: the automatic tin soldering machine is characterized in that reflow soldering sections (11) are arranged at two ends of the length direction of the machine shell (1), a dip soldering box (12) for containing liquid tin is arranged between the two reflow soldering sections (11), the upper end of the dip soldering box (12) is opened, guide rails (2) for placing dies are arranged at two sides of the dip soldering box (12) along the length direction of the machine shell (1), the guide rails (2) are higher than the dip soldering box (12), the guide rails (2) are arranged along the length direction of the machine shell (1), driving pieces (3) for pushing the dies to move along the length direction of the machine shell (1) are arranged in the machine shell (1), lifting rods (4) are connected in a sliding mode along the vertical direction, support plates (41) are arranged at the upper ends of the lifting rods (4), the support plates (41) are used for communicating the guide rails (2) at two sides of the dip soldering box (12), and the dies are made of materials which are not easy to be dipped with tin;
the driving piece (3) comprises two chains (31), the two chains (31) are arranged along the length direction of the machine shell (1), the chains (31) are positioned above the guide rail (2), the dip soldering box (12) is positioned between the two chains (31), and a plurality of push rods (32) for pushing the die are connected between the two chains (31);
a plurality of tool frames (5) for supporting the die are arranged between the two chains (31), the tool frames (5) are distributed along the length direction of the machine shell (1), the tool frames (5) are made of materials which are not easy to be stained with tin, the tool frames (5) comprise two rectangular frames (51), the two rectangular frames (51) are arranged up and down, a space which is larger than the thickness of the die is reserved between the two rectangular frames (51), and a plurality of connecting rods (52) are fixedly connected between the two rectangular frames;
the utility model discloses a machine shell, including casing (1) and frock frame (5), casing (1) length direction's one end is equipped with temporary storage frame (6) that are used for stacking frock frame (5), and temporary storage frame (6) are located between two chains (31), and material loading mouth (61) with frock frame (5) size adaptation are seted up to temporary storage frame (6) lower extreme.
2. The PPTC protector process apparatus for a power battery of claim 1 wherein: two first air cylinders (42) are fixedly arranged in the shell (1), the first air cylinders (42) correspond to the lifting rods (4) one by one, and the output ends of the first air cylinders (42) are fixedly connected with the corresponding lifting rods (4).
3. The PPTC protector process apparatus for a power battery of claim 1 wherein: a rotating shaft (8) is arranged in the shell (1), the rotating shaft (8) is fixedly connected with two cams (81), the cams (81) correspond to the lifting rods (4) one by one, and the lower end parts of the lifting rods (4) are abutted to the corresponding cams (81).
4. The PPTC protector process apparatus for a power battery of claim 1 wherein: the dip soldering box (12) is connected with a scraping plate (7) in a sliding mode, and the scraping plate (7) is horizontally arranged and located at the upper end portion of the dip soldering box (12).
5. The PPTC protector process apparatus for a power battery of claim 1 wherein: both ends of the length direction of the supporting plate (41) are in an arc shape which is bent downwards.
6. The PPTC protector process apparatus for a power battery of claim 1 wherein: the upper end part of the shell (1) is hinged with a safety cover (13), and the edge of the safety cover (13) is provided with a heat preservation piece (14).
7. A process for producing a PPTC protector, applied to a PPTC protector processing apparatus for a power battery as claimed in any one of claims 1 to 6, comprising the steps of:
s1, cutting a chip: cutting the positive plate, the chip plate and the negative plate into required shapes respectively;
s2, dispensing solder paste: sequentially placing the positive plate, the chip plate and the negative plate into a mold, and injecting solder paste between the positive plate and the chip plate and between the chip plate and the negative plate;
s3, mounting a tool frame (5): placing a die with a workpiece in a tool frame (5), stacking a plurality of tool frames (5) in a temporary storage frame (6), and abutting the tool frame (5) at the lowest part with the machine shell (1);
s4, heating and welding: the tool frame (5) automatically moves into the machine shell (1) along with the driving piece (3), the reflow soldering section (11) is subjected to preliminary heating, the lifting rod (4) drives the tool frame (5) to descend, after the die is directly contacted with high-temperature liquid tin for a period of time, the lifting rod (4) drives the tool frame (5) to ascend, and the driving piece (3) controls the tool frame (5) to move out of the machine shell (1).
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| DE102021112047A1 (en) * | 2021-05-07 | 2022-11-10 | Ersa Gmbh | Traversing unit for moving two soldering assemblies for processing printed circuit boards and soldering system for selective wave soldering with one traversing unit |
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