CN217991202U

CN217991202U - High welding efficiency SMT reflow soldering device

Info

Publication number: CN217991202U
Application number: CN202220885483.8U
Authority: CN
Inventors: 任飞
Original assignee: Zhejiang Jiachen Semiconductor Co ltd
Current assignee: Zhejiang Jiachen Semiconductor Co ltd
Priority date: 2022-04-16
Filing date: 2022-04-16
Publication date: 2022-12-09
Anticipated expiration: 2032-04-16

Abstract

The utility model discloses a high welding efficiency SMT reflow soldering device, include the welding stage and connect in the furnace body on welding stage top, pass through the running roller conveyer between welding stage and the furnace body, a plurality of temperature zones are separated out to the lower extreme of furnace body, install the heating cabinet in the temperature zone, be equipped with heating element in the heating cabinet, the bottom of heating cabinet is run through and is equipped with a plurality of heating holes, the top of heating cabinet is equipped with the fan room, be equipped with the dwang that runs through a plurality of temperature zones and set up on the furnace body, fixed mounting has a plurality of gears on the dwang, it has at least one gear to correspond to distribute in each temperature zone, the fixed bar tooth of being connected with gear engagement that is equipped with in top of heating cabinet, the heating cabinet blows to components and parts after to gas heating, through bar tooth and gear engagement, the dwang rotates and drives the heating cabinet and reciprocates, thereby can adjust the distance of heating hole and components and parts, make the heating hole be close to components and parts as far as possible, thereby improve the efficiency of heating, so that the efficiency of welding improves.

Description

High welding efficiency SMT reflow soldering device

Technical Field

The utility model relates to a reflow soldering technical field, concretely relates to high welding efficiency SMT reflow soldering device.

Background

The SMT production line, also called surface assembly technology, is a new generation of electronic assembly technology developed from hybrid integrated circuit technology, and is characterized by adopting component surface mounting technology and reflow soldering technology, and becomes a new generation of assembly technology in electronic product manufacturing, and the SMT production line mainly comprises the following equipment: in the actual use process of the reflow oven, generally speaking, the closer the air outlet in a heating area is to the surface of a component, the faster the heating is, and the higher the soldering efficiency is, but the height position of the air outlet in the prior art is fixed and cannot be changed along with the change of the surface height of the soldered component.

Disclosure of Invention

In order to solve the shortcomings in the prior art, the utility model provides a high welding efficiency SMT reflow soldering device.

In order to realize the technical effect, the utility model discloses a following scheme:

the utility model provides a high welding efficiency SMT reflow soldering device, includes the welding stage and connects in the furnace body on welding stage top, through the running roller conveyer between welding stage and the furnace body, the lower extreme of furnace body is sunken being equipped with the furnace chamber up, a plurality of temperature districts are separated by a plurality of baffles in the furnace chamber, and a plurality of temperature districts set gradually along the direction of delivery of running roller conveyer, install the heating cabinet in the temperature district, heating cabinet and temperature district phase-match, the heating cabinet is located the top of running roller conveyer, be equipped with heating element in the heating cabinet, the bottom of heating cabinet is run through and is equipped with a plurality of heating holes, the top of heating cabinet is equipped with the fan room, the fan room passes through connecting pipe and heating cabinet intercommunication, the fan is indoor to be equipped with the fan, the fan room passes through corrugated hose and connects the blast pipe, the blast pipe connects the storage jar, the blast pipe is located the furnace body outside, be equipped with the dwang that runs through a plurality of temperature districts setting, the dwang is connected with baffle rotation, the stove body is installed outside and is driven pivoted rotating electrical machinery, the dwang is located the heating cabinet top, fixed mounting has a plurality of gears on the draught fan, corresponds the fixed gear that the top of the vertical temperature district that connects along the guide rack that the guide is connected with the vertical guide groove that the guide is connected with the outer wall that the guide is connected.

According to the preferable technical scheme, the heating assembly adopts a plate-shaped PTC heater, and the size of the PTC heater is matched with the size of the cross section of the heating box.

The utility model discloses a PTC heater, including heating box, fan housing, upper plate, lower plate, upper plate and lower plate, the fan housing is located PTC heater's top, the fan housing includes upper plate and lower plate, the upper plate all arches up with the lower plate and sets up, the upper plate is the circular arc surface form with the shape of lower plate, upper plate all around with heating box inner wall sealing connection, the centre of upper plate is equipped with the wind hole, wind jogged joint connecting pipe, the lower plate is located the below of upper plate, the lower plate all around with the inner wall sealing connection of heating box, it has a plurality of ventilation holes to distribute down on the plate, do not connect the vacuole formation between upper plate and the lower plate.

According to the preferable technical scheme, the distance between the upper layer plate and the lower layer plate is gradually reduced from the center to the periphery, and the ventilation holes are gradually densely distributed from the center of the lower layer plate to the periphery.

According to the preferable technical scheme, the exhaust pipe is connected with a waste gas treatment device, and an air outlet of the waste gas treatment device is connected with the air source tank through a conveying pipe.

Compared with the prior art, beneficial effect does:

the utility model discloses simple structure, convenient to use discharges from the heater hole after heating gas through the heater box and blows to components and parts, and the heater box slides the setting from top to bottom in the temperature zone to through bar tooth and gear engagement, when the dwang rotates, can drive the heater box and reciprocate, thereby can adjust the distance of heater hole and components and parts, can adjust the height of heater box according to the height of welded components and parts, make the heater hole be close to components and parts as far as, thereby improve the efficiency of heating, so that improve welded efficiency.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the connection between the middle bar-shaped teeth and the gear.

Reference numerals: 1. a welding table; 2. a furnace body; 3. a roller conveyor; 4. a temperature zone; 5. a partition plate; 6. a heating box; 7. a PTC heater; 8. heating the hole; 9. an upper plate; 10. a lower layer plate; 11. a ventilation hole; 12. A fan chamber; 13. a corrugated hose; 14. a connecting pipe; 15. an air supply pipe; 16. rotating the rod; 17. a gear; 18. a bar-shaped tooth; 19. an exhaust duct; 20. an exhaust duct; 21. an induced draft fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

A high welding efficiency SMT reflow soldering device comprises a welding table 1 and a furnace body 2 connected to the top end of the welding table 1, wherein a roller conveyor 3 is arranged between the welding table 1 and the furnace body 2, the roller conveyor 3 is used for conveying a substrate, components are welded on the substrate, the lower end of the furnace body 2 is recessed upwards to form a furnace chamber, a plurality of temperature zones 4 are separated from the furnace chamber by a plurality of partition plates 5, the temperature zones 4 are sequentially arranged along the conveying direction of the roller conveyor 3, the temperature gradient gradually rises along the conveying direction of the roller conveyor 3 and then gradually falls, firstly, solder paste is gradually heated and then welded, the solder paste is gradually cooled after the solder paste is finished, a heating box 6 is installed in the temperature zones 4, the heating box 6 is matched with the temperature zones 4, the heating box 6 is located above the roller conveyor 3, and a heating assembly is arranged in the heating box 6, the power of the heating components in each temperature zone 4 is different, so that the temperature difference in each temperature zone 4 generates a temperature gradient, a plurality of heating holes 8 are arranged at the bottom of the heating box 6 in a penetrating manner, a fan chamber 12 is arranged at the top of the heating box 6, the fan chamber 12 is communicated with the heating box 6 through a connecting pipe 14, a fan is arranged in the fan chamber 12, the fan chamber 12 is connected with an air supply pipe 15 through a corrugated hose 13, the air supply pipe 15 is connected with an air source storage tank, the air supply pipe 15 is positioned at the outer side of the furnace body 2, pure air or nitrogen is filled in the air source storage tank, airflow is formed under the action of the fan, is conveyed into the heating box 6 to be heated through the heating components and then is blown out from the heating holes 8 to be heated, a rotating rod 16 arranged through the plurality of temperature zones 4 is arranged on the furnace body 2, and the rotating rod 16 is rotatably connected with the furnace body 2 and the partition plate 5, the furnace body 2 installs drive dwang 16 pivoted rotating electrical machines outward, dwang 16 is located heating cabinet 6 top, fixed mounting has a plurality of gears 17 on the dwang 16, and it has at least one gear 17 to correspond to distribute in each temperature zone 4, the fixed bar tooth 18 of being connected with the gear 17 meshing that is equipped with in top of heating cabinet 6, the direction edge that is equipped with vertical setting on the outer wall all around of heating cabinet 6, have on the inner wall of temperature zone 4 and follow the guide way that matches with the direction, the direction slides along the guide way that the embedding corresponds, and heating cabinet 6 reciprocates in temperature zone 4 and is used for height-adjusting, through bar tooth 18 and gear 17 meshing, when rotating dwang 16, drives heating cabinet 6 and goes up and down, the top of welding stage 1 has a plurality of grooves 19 of airing exhaust that correspond with temperature zone 4, exhaust duct 20 is passed through to the bottom of exhaust groove 19 and is connected draught fan 21, and draught fan 21 starts the waste gas discharge in the temperature zone 4 that will correspond.

The preferred technical scheme, heating element adopts platelike PTC heater 7, PTC heater 7's size and heating cabinet 6's cross section size phase-match, PTC heater 7 compares more energy-conservingly with traditional electric heating wire, and when the fan damaged, when no air current drove the heat and gives off, electric heating wire can cause the damage because the temperature is higher and higher, can effectively avoid this point through PTC heater 7.

The preferred technical scheme, be equipped with the fan housing in the heating cabinet, the fan housing is located PTC heater 7's top, the fan housing includes upper plate 9 and lower plywood 10, upper plate 9 and lower plywood 10 all arch up the setting, the shape of upper plate 9 and lower plywood 10 is the circular arc face form, upper plate 9 all around with heating cabinet inner wall sealing connection, the centre of upper plate 9 is equipped with the wind hole, wind jogged joint connecting pipe 14, plywood 10 is located the below of upper plate 9 down, down the plywood 10 all around with the inner wall sealing connection of heating cabinet 6, it has a plurality of ventilative holes 11 to distribute down on the plywood 10, do not throw out of connection between upper plate 9 and the lower plywood 10 and form the cavity.

In operation, the airflow brought by the connecting pipe 14 can be concentrated at the position of the air hole, most of the air quantity is concentrated at one position, so that the air on the PTC heater 7 is unbalanced, and the arc-surface-shaped upper layer plate 9 and the arc-surface-shaped lower layer plate 10 are adopted, so that the airflow can be guided to the periphery from the middle, and the airflow concentration is avoided.

According to the preferable technical scheme, the distance between the upper plate 9 and the lower plate 10 is gradually reduced from the center to the periphery, the distribution of the ventilation holes 11 is gradually concentrated from the center of the lower plate 10 to the periphery, the smaller the space is, the faster the airflow speed is, the less the airflow is at the periphery positions closer to the upper plate 9 and the lower plate 10, the airflow is increased by increasing the flow speed, and the airflow is further increased by the concentration of the ventilation holes 11, so that the air of the PTC heater 7 in the heating box 6 is relatively uniform.

According to the preferable technical scheme, the exhaust pipe 20 is connected with a waste gas treatment device, and an air outlet of the waste gas treatment device is connected with an air source tank through a conveying pipe.

The waste gas treatment device adopts the prior art, the smart reflow soldering waste gas is mainly evaporated by soldering flux in soldering paste when being heated, a plurality of chemical components harmful to human bodies are contained in the soldering flux, a system developed recently comprises a two-section filtering/separating system and an integrated self-cleaning function, so that the maintenance requirement is reduced, and the first section of filtering utilizes a mesh type filter screen which is contained in a heating box. During entry into the heating chamber, the flux vapor undergoes an expansion process, increasing the pressure and creating small droplets which, if large enough, fall out of the air stream, leaving the vapor to pass through a screen which separates the large, heavy particles from the vapor. These particles are mainly composed of metal, resin and rosin which are entrapped and remain adhered to the outside of the screen. This helps to eliminate the high viscosity and difficult to clean residue from going down into the system.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like refer to the orientation or position relationship shown in the drawings, or the orientation or position relationship that the product of the present invention is usually placed when in use, or the orientation or position relationship that one skilled in the art conventionally understands, and are only for convenience of describing the present invention and simplifying the description, but do not refer to or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

Claims

1. The utility model provides a high welding efficiency SMT reflow soldering device, a serial communication port, include the welding bench and connect in the furnace body on welding bench top, through the running roller conveyer between welding bench and the furnace body, the lower extreme of furnace body is sunken being equipped with the furnace chamber up, a plurality of temperature districts are separated by a plurality of baffles in the furnace chamber, and a plurality of temperature districts set gradually along the direction of delivery of running roller conveyer, install the heating cabinet in the temperature district, heating cabinet and temperature district phase-match, the heating cabinet is located the top of running roller conveyer, be equipped with heating element in the heating cabinet, the bottom of heating cabinet is run through and is equipped with a plurality of heating holes, the top of heating cabinet is equipped with the fan room, the fan room passes through connecting pipe and heating cabinet intercommunication, be equipped with the fan in the fan room, the fan room passes through corrugated hose connection blast pipe, blast pipe connection storage jar, the blast pipe is located the furnace body outside, be equipped with the dwang that runs through a plurality of temperature districts setting on the furnace body, the dwang is connected with furnace body and baffle rotation, the furnace body is installed outside and is driven pivoted rotating electrical machinery, the fan room is located the heating cabinet top, fixed gear connection that the vertical heat that the exhaust duct that connects along the vertical direction that the vertical temperature matched with the guide that the exhaust groove that the inner wall that the induced draft has along the corresponding.

2. A high soldering efficiency SMT reflow apparatus according to claim 1, wherein the heating assembly employs plate-shaped PTC heaters having a size that matches a cross-sectional size of the heater chamber.

3. An SMT reflow soldering device with high soldering efficiency according to claim 2, wherein a fan cover is arranged in the heating box and located above the PTC heater, the fan cover comprises an upper plate and a lower plate, the upper plate and the lower plate are arranged in an upward arched manner, the upper plate and the lower plate are both in a circular arc shape, the periphery of the upper plate is in sealing connection with the inner wall of the heating box, a wind hole is formed in the middle of the upper plate and connected with a connecting pipe, the lower plate is located below the upper plate, the periphery of the lower plate is in sealing connection with the inner wall of the heating box, a plurality of wind penetrating holes are distributed in the lower plate, and a cavity is formed between the upper plate and the lower plate in a non-connection mode.

4. An SMT reflow apparatus according to claim 3, wherein the distance between the upper plate and the lower plate decreases from the center to the periphery, and the distribution of the ventilation holes is gradually increased from the center to the periphery of the lower plate.

5. An SMT reflow apparatus with high soldering efficiency according to claim 1, wherein the exhaust pipe is connected with an exhaust gas treatment device, and an air outlet of the exhaust gas treatment device is connected with an air source tank through a conveying pipe.