CN219960968U - Vacuum pumping device for reflow oven - Google Patents
Vacuum pumping device for reflow oven Download PDFInfo
- Publication number
- CN219960968U CN219960968U CN202321046963.6U CN202321046963U CN219960968U CN 219960968 U CN219960968 U CN 219960968U CN 202321046963 U CN202321046963 U CN 202321046963U CN 219960968 U CN219960968 U CN 219960968U
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- China
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- vacuum
- cavity
- guide shaft
- set forth
- reflow ovens
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- 238000005086 pumping Methods 0.000 title abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 230000009194 climbing Effects 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 12
- 238000009434 installation Methods 0.000 abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The utility model relates to a vacuum pumping device for a reflow oven, which comprises a vacuum cavity, wherein a vacuum pump is externally connected with the vacuum cavity, a vacuum cover is correspondingly arranged at the top of the vacuum cavity, a jacking mechanism is supported at the bottom of the vacuum cavity, and the jacking mechanism comprises: a reference bottom plate, on which a servo motor is installed; the transmission belt is connected with the output shaft of the servo motor; the screw assembly comprises a plurality of screws, and the screws and the output shaft of the servo motor jointly tension the transmission belt; the moving plate is penetrated by the screw rod and driven by the screw rod; the guide shaft moves upwards to realize the opening and closing of the vacuum cover. The utility model has a reliable jacking mechanism for pushing the vacuum cover, and the jacking mechanism has the function of compensating installation deviation, thereby ensuring assembly precision. The utility model is also provided with an intelligent control proportional electromagnetic valve, so that the vacuum pumping and back pressure rate can be accurately controlled, intelligent control can be realized in both the nitrogen process and the common air process, and the control can be realized in a single step or multiple steps.
Description
Technical Field
The utility model relates to the technical field of reflow ovens, in particular to a vacuum pumping device for a reflow oven.
Background
Reflow ovens are one type of equipment required for SMT processes in the electronics and technology industry. The reflow oven process is to realize the soldering of the mechanical and electrical connection between the soldering terminals or pins of the surface-assembled components and the soldering pads of the printed board by remelting the paste solder pre-distributed on the soldering pads of the printed board. The reflow oven is the last key process of the surface mounting technology, and is a real-time control process. The process is complex and involves multiple sets of process parameters.
The vacuumizing step is a step of vacuumizing bubbles in the solder paste when the solder paste is not hardened, wherein a vacuum cover needs to be opened and closed in the process, and the vacuum cover needs to be closed when being closed.
Disclosure of Invention
The inventor aims at the defects in the prior art, and provides a vacuum pumping device for a reflow oven, which has a reasonable structure, is provided with a reliable jacking mechanism for pushing a vacuum cover, and has the function of compensating installation deviation, thereby ensuring assembly precision.
The technical scheme adopted by the utility model is as follows:
the vacuum pumping device for the reflow oven comprises a vacuum cavity, wherein a vacuum pump is externally connected with the vacuum cavity, a vacuum cover is correspondingly arranged at the top of the vacuum cavity, a jacking mechanism is supported at the bottom of the vacuum cavity,
the climbing mechanism comprises:
a reference bottom plate, on which a servo motor is installed;
the transmission belt is connected with the output shaft of the servo motor;
the screw assembly comprises a plurality of screws, and the screws and the output shaft of the servo motor jointly tension the transmission belt;
the moving plate is penetrated by the screw rod and driven by the screw rod;
the guide shaft is positioned on the moving plate and moves upwards to realize the opening and closing of the vacuum cover.
As a further improvement of the above technical scheme:
the middle section position of guiding axle is equipped with bellows compensation structure, and bellows compensation structure contradicts on the plate body of vacuum chamber below.
The axial end face of the corrugated pipe is sealed, and an oil filling hole is formed in the end face sealing structure of the bottom of the corrugated pipe.
The movable plate is provided with a through hole for accommodating the guide shaft, and the diameter of the guide shaft is smaller than that of the through hole.
The guide shaft bottom presss from both sides and holds the cushion, and the cushion centre gripping is in the upper and lower both sides of movable plate, and contradicts on the upper and lower face of movable plate.
The size of the cushion block is larger than the diameter of the through hole for accommodating the guide shaft on the moving plate.
The guide shaft penetrates through the bottom end of the moving plate and is provided with a hanging oil pan.
A vacuum tank is connected between the vacuum pump and the vacuum cavity; the vacuum tank comprises a tank body, a cavity pipe is arranged at the top of the tank body, and a pump pipe is arranged on the side wall of the tank body; a vacuum filter element communicated with the cavity tube is arranged in the tank body; the output end of the vacuum filter element is provided with a vacuum filter screen.
The cavity pipe is connected with the vacuum cavity, and the pump pipe is connected with the vacuum pump; the connection position between the pump pipe and the tank body corresponds to the vacuum filter core side.
The jacking mechanism further comprises an electromagnetic brake, and the electromagnetic brake controls the screw rod to brake.
The beneficial effects of the utility model are as follows:
the utility model has compact and reasonable structure and convenient operation, and the lifting mechanism is additionally arranged below the vacuum cavity to assist the opening of the vacuum cover, so that the cover opening process is more stable; the guide shaft of the jacking mechanism is provided with a corrugated pipe, the corrugated pipe can play a role in elastic compensation, the end face of the corrugated pipe is sealed by adopting a flange, the end face seal is realized, and the requirement of compensating installation errors is met while the seal is realized;
the guide shaft is in floating connection with the moving plate, and is clamped by the cushion blocks, so that radial movement is limited, and the compensation amount of the corrugated pipe is not influenced or increased; the guide shaft clamped by the cushion block can move in the horizontal plane to compensate the installation deviation in the horizontal direction; the precision error is improved as a whole;
meanwhile, the utility model can prevent the guide shaft from being blocked, and prevent the structure from being blocked due to the non-concentric structure. And an electromagnetic brake is further arranged at the bottom and used for electromagnetic braking of the screw rod, so that the screw rod transmission can be accurately braked.
Through add vacuum intelligent proportional valve control system in vacuum cavity's extraction opening department, increased the air supplementing process in the evacuation in-process, realize accurately realizing vacuum extraction and back pressure rate through controlling intelligent proportional solenoid valve and come switching, the slope that can fine control vacuum extraction and back pressure, fine reduction or avoid the customer to produce because the tin defect of frying of extraction process in the production process.
Drawings
Fig. 1 is a schematic view of the whole structure of the present utility model, in which an upper cover is hidden.
Fig. 2 is a schematic overall structure of the present utility model, showing the upper cover.
FIG. 3 is a schematic view of the internal structure of the evacuation station of the present utility model.
Fig. 4 is an isolated schematic view of the evacuation station of the present utility model.
Fig. 5 is a cross-sectional view of the frame of the evacuation station of the present utility model.
Fig. 6 is a cross-sectional view of the guide shaft structure of the present utility model.
Fig. 7 is a schematic view of a vacuum lid of the present utility model.
Fig. 8 is a schematic view of the structure of the external vacuum tank of the present utility model.
Fig. 9 is a schematic view of the structure of the vacuum tank of the present utility model.
Fig. 10 is a cross-sectional view of a vacuum tank of the present utility model.
FIG. 11 is a schematic diagram of the position of the control system of the vacuum intelligent proportional valve of the present utility model.
Wherein: 1. a case; 2. an upper cover; 3. a feeding station; 4. a preliminary filtration station; 5. a heating station; 6. a vacuum pumping station; 7. a refrigeration station; 8. a blanking station; 9. a conveyor chain;
601. a vacuum chamber; 602. a vacuum cover; 603. a vacuum pump; 604. a servo motor; 605. a lead screw assembly; 606. a guide shaft; 607. a moving plate; 608. a reference base plate; 609. a bellows; 610. sealing the end face; 611 cushion blocks; 612 hanging an oil pan; 613. a drive belt; 614 oil filling holes; 615. a cavity tube; 616. a pump tube; 617. a tank body; 618. a vacuum filter element; 619. and (5) vacuum filter screen. 620. And a vacuum intelligent proportional valve control system.
Detailed Description
The following describes specific embodiments of the present utility model with reference to the drawings.
The vacuum pumping device for the reflow oven comprises a vacuum cavity, wherein a vacuum pump is externally connected with the vacuum cavity, a vacuum cover is correspondingly arranged at the top of the vacuum cavity, a jacking mechanism is supported at the bottom of the vacuum cavity,
the climbing mechanism comprises:
a reference bottom plate, on which a servo motor is installed;
the transmission belt is connected with the output shaft of the servo motor;
the screw assembly comprises a plurality of screws, and the screws and the output shaft of the servo motor jointly tension the transmission belt;
the moving plate is penetrated by the screw rod and driven by the screw rod;
the guide shaft is positioned on the moving plate and moves upwards to realize the opening and closing of the vacuum cover.
As a further improvement of the above technical scheme:
the middle section position of guiding axle is equipped with bellows compensation structure, and bellows compensation structure contradicts on the plate body of vacuum chamber below.
The axial end face of the corrugated pipe is sealed, and an oil filling hole is formed in the end face sealing structure of the bottom of the corrugated pipe.
The movable plate is provided with a through hole for accommodating the guide shaft, and the diameter of the guide shaft is smaller than that of the through hole.
The guide shaft bottom presss from both sides and holds the cushion, and the cushion centre gripping is in the upper and lower both sides of movable plate, and contradicts on the upper and lower face of movable plate.
The size of the cushion block is larger than the diameter of the through hole for accommodating the guide shaft on the moving plate.
The guide shaft penetrates through the bottom end of the moving plate and is provided with a hanging oil pan.
A vacuum tank is connected between the vacuum pump and the vacuum cavity; the vacuum tank comprises a tank body, a cavity pipe is arranged at the top of the tank body, and a pump pipe is arranged on the side wall of the tank body; a vacuum filter element communicated with the cavity tube is arranged in the tank body; the output end of the vacuum filter element is provided with a vacuum filter screen.
The cavity pipe is connected with the vacuum cavity, and the pump pipe is connected with the vacuum pump; the connection position between the pump pipe and the tank body corresponds to the vacuum filter core side.
The jacking mechanism further comprises an electromagnetic brake, and the electromagnetic brake controls the screw rod to brake.
The utility model has the following specific structure and working principle:
the utility model is applied to a reflow oven shown in fig. 1 and 2, and as shown in fig. 1, the reflow oven is provided with: the device comprises a feeding station 3, a heating station 5, a vacuumizing station 6, a refrigerating station 7 and a discharging station 8; the built-in conveyor chain 9 traverses all stations for transporting the products.
As shown in fig. 3-4, the structure of the evacuation station 6 in the present utility model is shown. Fig. 9 is a vacuum tank structure connected between a vacuum chamber 601 and a vacuum pump 603 for filtering gas drawn from the vacuum chamber 601. The vacuum filter comprises a tank body, wherein a vacuum filter element is coaxially arranged in the tank body, and a vacuum filter screen is arranged below the vacuum filter element and at the bottom of the tank body. The top of the tank body is provided with a cavity pipe communicated with the vacuum cavity 601, and the side of the tank body is provided with a pump pipe communicated with the vacuum pump 603. The interface of the pump pipe is positioned at the vacuum filter element.
As shown in fig. 3-4, a lifting mechanism is arranged below the vacuumizing station 6. The jacking mechanism comprises a reference bottom plate 608 at the bottom, a servo motor 604 is arranged on the reference bottom plate 608, an output shaft of the servo motor 604 points upwards, a plurality of lead screws are driven by a transmission belt 613, and penetrate through a moving plate 607, and the moving plate 607 is driven to move up and down by the rotation of the lead screws. The four top corners of the moving plate 607 are respectively provided with a guide shaft 606, and the top of the guide shaft 606 is upwards pointed for jacking up the vacuum cover 602.
In one embodiment of the utility model, an electromagnetic brake is arranged at the reference bottom plate or the servo motor and is used for braking the screw rod, so that the screw rod can be accurately braked, and the transmission precision of the component is improved.
As shown in fig. 5 and 6, a bellows 609 is sleeved at the middle section of the guide shaft 606, and the bellows 609 plays a role in elastic compensation. The end face of the bellows 609 is sealed 610 by a flange face, and an oil hole is formed in the flange seal. This seal, bellows 609 combined configuration allows for sealing to be achieved while compensating for installation errors.
A cushion block made of brass is arranged at the connecting position of the guide shaft 606 and the movable plate 607. Each guide shaft 606 is provided with two pads, which are respectively clamped on the upper side and the lower side of the moving plate 607. The opening formed in the moving plate 607 is larger than the diameter of the guide shaft 606, so that after being clamped by the cushion block, the cushion block can translate along with the guide shaft 606 on the horizontal plane, namely the plane where the moving plate 607 is located, but cannot axially move, so that the transverse installation displacement can be compensated.
At the bottom end of the guide shaft 606, which extends out of the moving plate 607, a hanging oil pan is provided for receiving the oil leaked from the surplus.
In use, the vacuumizing station 6 is sealed with the vacuum cover 602 by adopting a customized sealing ring, the vacuum cover 602 is connected with the upper cover 2, and when the upper cover 2 is opened, the vacuum cover 602 is opened together. The pumping hole 401 of the vacuum cavity 601 is connected with the vacuum pump 603 through a vacuum tank, and the connectors are all special connectors. When the vacuum cover 602 needs to be lifted, the lifting mechanism driven by the servo motor 604 below pushes the guide shaft 606 to lift upwards, so that the lifting operation of the upper cover 2 is more stable; the guide shaft 606 is capable of compensating for both axial and radial mounting errors.
The mouth of the vacuum chamber 601 is provided with a sealing ring.
As shown in fig. 8-10, when the vacuum tank sucks, the air flow is filtered twice through the vacuum filter screen 619 and the vacuum filter element 618, so that the air flow purity after filtration is ensured.
As shown in fig. 11, a vacuum intelligent proportional valve control system 620 is added at the pumping port of the vacuum chamber to reduce or avoid the tin-frying defect caused by pumping process in the production process of the customer.
The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.
Claims (10)
1. The utility model provides a reflux furnace is with evacuating device which characterized in that: comprises a vacuum cavity (601), a vacuum pump (603) is externally connected with the vacuum cavity (601), a vacuum cover (602) is correspondingly arranged at the top of the vacuum cavity (601), a jacking mechanism is supported at the bottom of the vacuum cavity, a vacuum intelligent proportional valve control system (620),
the climbing mechanism comprises:
a reference base plate (608), wherein a servo motor (604) is arranged on the reference base plate (608);
a transmission belt (613) connected with the output shaft of the servo motor (604);
the screw assembly (605) comprises a plurality of screws, and the screws and the output shaft of the servo motor (604) jointly tension a transmission belt (613);
the moving plate (607) is penetrated by the screw rod and driven by the screw rod;
and a guide shaft (606) positioned on the moving plate (607), wherein the guide shaft (606) moves upwards to realize the opening and closing of the vacuum cover (602).
2. The vacuum extractor for reflow ovens as set forth in claim 1, wherein: the middle section position of guiding axle (606) is equipped with bellows (609) compensation structure, and bellows (609) compensation structure is contradicted on the plate body of vacuum chamber (601) below.
3. The vacuum extractor for reflow ovens as set forth in claim 2, wherein: the axial end face seal (610) of the corrugated pipe (609) is arranged, wherein an oil filling hole (614) is formed in the structural part of the end face seal (610) at the bottom of the corrugated pipe (609).
4. The vacuum extractor for reflow ovens as set forth in claim 1, wherein: the moving plate (607) is provided with a through hole for accommodating the guide shaft (606), and the diameter of the guide shaft (606) is smaller than that of the through hole.
5. The vacuum extractor for reflow ovens as set forth in claim 4, wherein: the bottom end of the guide shaft (606) is clamped with cushion blocks, and the cushion blocks are clamped on the upper side and the lower side of the movable plate (607) and are abutted against the upper surface and the lower surface of the movable plate (607).
6. The vacuum extractor for reflow ovens as set forth in claim 5, wherein: the size of the cushion block is larger than the diameter of a through hole for accommodating the guide shaft (606) on the moving plate (607).
7. The vacuum extractor for reflow ovens as set forth in claim 1, wherein: the guide shaft (606) penetrates through the bottom end of the moving plate (607) and supports a hanging oil pan.
8. The vacuum extractor for reflow ovens as set forth in claim 1, wherein: a vacuum tank is connected between the vacuum pump (603) and the vacuum cavity (601); the vacuum tank comprises a tank body (617), a cavity pipe (615) is arranged at the top of the tank body (617), and a pump pipe (616) is arranged on the side wall of the tank body (617); a vacuum filter element (618) communicated with the cavity tube (615) is arranged in the tank body (617); the output end of the vacuum filter element (618) is provided with a vacuum filter screen (619).
9. The vacuum extractor for reflow ovens as set forth in claim 8, wherein: the cavity pipe (615) is connected with the vacuum cavity (601), and the pump pipe (616) is connected with the vacuum pump (603); the connection position between the pump tube (616) and the tank (617) corresponds to the vacuum filter cartridge (618) side.
10. The vacuum extractor for reflow ovens as set forth in claim 1, wherein: the jacking mechanism further comprises an electromagnetic brake, and the electromagnetic brake controls the screw rod to brake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321046963.6U CN219960968U (en) | 2023-05-04 | 2023-05-04 | Vacuum pumping device for reflow oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321046963.6U CN219960968U (en) | 2023-05-04 | 2023-05-04 | Vacuum pumping device for reflow oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219960968U true CN219960968U (en) | 2023-11-03 |
Family
ID=88550647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321046963.6U Active CN219960968U (en) | 2023-05-04 | 2023-05-04 | Vacuum pumping device for reflow oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219960968U (en) |
-
2023
- 2023-05-04 CN CN202321046963.6U patent/CN219960968U/en active Active
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