CN120839185B - Automatic welding device for iron shell based on SMT printing - Google Patents

Abstract

The invention relates to the field of equipment for manufacturing printed circuits, in particular to an automatic welding device for iron shell parts based on SMT printing, which comprises an assembly table and a reflow soldering furnace; the reflow oven comprises a placing table which can slide back and forth along the length direction of the reflow oven and is used for placing the primary assembly or the assembly, an smearing part which can smear the soldering paste on the primary assembly placed on the placing table is arranged on the reflow oven, a transferring part which can transfer the primary assembly or the assembly placed on the placing table to the placing table and can transfer the primary assembly smeared with the soldering paste placed on the placing table to the assembling table is arranged beside the assembling table, and an installation part which is used for installing an iron shell on the primary assembly smeared with the soldering paste placed on the assembling table is also arranged beside the assembling table. The existing welding mode has the problems of lower welding precision and lower efficiency, and the device provided by the invention has higher welding precision and higher efficiency.

Description

Automatic welding device for iron shell based on SMT printing

Technical Field

The invention relates to the field of equipment for manufacturing printed circuits, in particular to an automatic welding device for iron shell parts based on SMT printing.

Background

Miniaturization refers to the process of designing and manufacturing smaller, more compact electronic devices. Miniaturization of electronic devices is driven by a number of factors, including the need for portable devices, the need for more functionality in smaller size devices, and the like.

SMT (Surface Mount Technology ) is one of the core support technologies for electronic device miniaturization. SMT includes two key steps, namely SMT printing and SMT taping. SMT printing refers to the process of stencil printing solder paste onto a printed circuit board. Solder paste is a viscous substance containing solder particles that melts and forms a strong electrical connection when heated. SMT patches are processes in which surface mount components are placed onto a printed circuit board that is printed with solder paste.

After the SMT printing and the SMT paster are finished, the surface mount components are required to be welded on the printed circuit board, and the accuracy of the SMT printing process directly influences the quality of the SMT paster and the welding quality.

The existing soldering method specifically comprises the steps of feeding the printed circuit board attached with the surface-mounted element into a reflow oven, melting solder particles in soldering paste, infiltrating pins of the surface-mounted element and pads of the printed circuit board, and forming firm electrical connection between the pins of the surface-mounted element and the pads of the printed circuit board after cooling and solidification. When the solder paste is scraped, the printed circuit board is manually fixed on the template, and the manual scraping knife is used for pushing the solder paste to enable the solder paste to enter the opening on the template, so that the welding precision is lower, and the quality and the efficiency of a final product are affected.

Therefore, the existing welding mode has the problems of lower welding precision and lower efficiency.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an automatic welding device for iron shell parts based on SMT printing, which has higher welding precision and higher efficiency.

In order to solve the technical problems, the invention provides an automatic welding device for iron shell parts based on SMT printing, which comprises an assembly table for placing a primary assembly part and a reflow soldering furnace for heating and soldering the assembly part;

The reflow oven comprises a placing table capable of sliding back and forth along the length direction of the reflow oven and used for placing the primary assembly or the assembly, wherein the reflow oven is provided with a smearing piece capable of smearing soldering paste on the primary assembly placed on the placing table;

A transfer piece which can transfer the primary assembly or the assembly placed on the assembly table to the placement table and can transfer the primary assembly coated with the soldering paste placed on the placement table to the assembly table is arranged beside the assembly table;

the mounting piece for mounting the iron shell piece to the primary assembly piece coated with the soldering paste placed on the assembly table is also arranged beside the assembly table.

As a further improvement of the invention, the reflow oven comprises a base, a placement table slidably mounted on top of the base, a front side of the top of the base being provided with a hearth for heating the assembly placed by the placement table.

As a further improvement of the invention, the smearing piece comprises a mounting plate which can be lifted, a first sliding block which can slide back and forth is arranged at the bottom of the mounting plate, and a multi-nozzle spray head for spraying soldering paste and a scraper which can be lifted are arranged on the first sliding block;

A template is arranged below the scraper and is fixedly connected with the bottom of the mounting plate through four connecting columns;

The ring piece has all been fixedly cup jointed outside the spliced pole, and four spliced pole outer slip cap are equipped with the stopper that is used for carrying out spacingly to four angles of assembled part respectively, and the spliced pole is located the partial overcoat between ring piece and the stopper and is equipped with first reset spring, the bottom fixed connection of top and ring piece of first reset spring, the bottom fixed connection of first reset spring and the top of stopper.

As a further improvement of the invention, the transfer member comprises a first plate which can rotate up and down and can be lifted, and the top of the first plate is provided with a transfer fork which can slide back and forth along the length direction of the first plate and is used for transferring the primary assembly or the assembly.

Preferably, the transfer fork is in a U-shaped structure and comprises two vertical ends and a transverse end, the vertical end of the transfer fork positioned below is composed of two mutually parallel strip-shaped plates, and the tops of the assembly table and the placement table are respectively provided with a sliding groove for each strip-shaped plate to slide along the length direction of the assembly table or the placement table;

the vertical end of the transfer fork above is provided with a pressing piece for pressing the iron shell piece.

The compressing piece can prevent the iron shell piece from displacement and deviation in the assembly piece transferring process.

The pressing piece comprises a second flat plate capable of lifting, a special-shaped plate capable of moving oppositely or back is arranged on the second flat plate, and pressing plates corresponding to the number and the positions of iron shell pieces arranged on the assembly piece are arranged at the bottom of the special-shaped plate.

As a further improvement of the invention, the mounting part comprises an L-shaped frame capable of moving back and forth, the L-shaped frame is composed of a transverse end and a vertical end, an iron shell placing table for placing a plurality of iron shells is arranged beside the vertical end of the L-shaped frame, a long plate capable of lifting is arranged at the bottom of the transverse end of the L-shaped frame, and a clamping part capable of sliding left and right and used for clamping the iron shells on the iron shell placing table is arranged at the bottom of the long plate.

Preferably, the clamping piece comprises a second sliding block capable of sliding at the bottom of the long plate and a small shelf capable of rotating around the upper and lower directions, a horizontal rotating shaft is arranged on the small shelf, an L-shaped plate is fixedly arranged on the rotating shaft and consists of a long end and a short end, and a clamping plate capable of moving back and forth in the direction perpendicular to the short end of the L-shaped plate is vertically arranged on the long end of the L-shaped plate.

Preferably, a cleaning member for cleaning the iron shell member held by the holding member is mounted on the vertical end of the L-shaped frame. The cleaning piece can clean the inside of the iron shell piece, and the quality of the connecting part is guaranteed.

Preferably, the cleaning piece comprises a wiping block which can reciprocate along the direction vertical to the vertical end of the L-shaped frame and can extend into the iron shell, the wiping block is sponge, and the vertical end of the L-shaped frame is fixedly provided with a horizontal eighth telescopic piece for driving the wiping block to reciprocate along the direction vertical to the vertical end of the L-shaped frame.

The automatic welding device for the iron shell parts based on SMT printing has the advantages of being high in welding precision and efficiency.

The device is used for smearing soldering paste for the primary assembly part through the smearing part, and is changed from manual work into automatic form, so that the smearing efficiency is greatly improved, and the final welding quality is also improved. Meanwhile, the installation of the iron shell is also carried out through the installation piece, so that the efficiency is greatly increased, and the installation is more accurate. The device also utilizes the placing table in the reflow oven to be used as a workbench for coating soldering paste, so that the space occupied by the device is saved.

Drawings

FIG. 1 is a schematic view of the overall structure of a bakelite base according to the present invention;

FIG. 2 is a schematic view of the overall structure of the magnetic aluminum plate carrier of the present invention;

FIG. 3 is a schematic view of the overall structure of the magnetic aluminum plate carrier according to another aspect of the present invention;

FIG. 4 is a schematic view showing the overall structure of the FPC in the present invention;

FIG. 5 is a schematic view of the overall structure of the primary assembly of the present invention with an iron shell mounted thereto;

FIG. 6 is a schematic diagram of the overall structure of the present invention;

FIG. 7 is a schematic view of the overall structure of another angle of the present invention;

FIG. 8 is a top view of the present invention;

FIG. 9 is a schematic view showing the overall structure of a reflow oven according to the present invention;

FIG. 10 is a schematic view of the overall structure of the applicator according to the present invention;

Fig. 11 is a rear view of the applicator of the present invention;

FIG. 12 is a schematic view of a portion of the structure of the applicator of the present invention;

FIG. 13 is a schematic view of the overall structure of the stopper according to the present invention;

FIG. 14 is a schematic view showing the positional relationship of the transfer member, placement stage and assembly stage according to the present invention;

FIG. 15 is a schematic view of the overall structure of the first slider, multi-nozzle spray head and doctor blade of the present invention;

FIG. 16 is a schematic view of the overall structure of the transfer fork and the hold-down member of the present invention;

FIG. 17 is a schematic view of the overall structure of the compression member of the present invention;

FIG. 18 is a schematic view of the relationship between the positions of the profiled plate, the fifth telescoping member and the push plate in the present invention;

FIG. 19 is a schematic view showing the overall structure of the mounting member and the cleaning member according to the present invention;

FIG. 20 is a schematic view of the overall structure of the clamping member according to the present invention;

FIG. 21 is a schematic perspective view of the cleaning elements and the vertical ends of the L-shaped frames of the present invention;

The names of the corresponding parts marked in the drawings are 1011, a bakelite base, 10111, a positioning PIN, 1012, a magnetic aluminum plate carrier, 10121, a positioning PIN hole of a avoidance base, 10122, slots of the avoidance iron shell, 1013, FPC, 10131, a mounting hole, 104 and an iron shell;

2. An assembly table;

3. Reflow oven 301, placing table 302, base 303, hearth;

4. The coating part comprises a coating part, a mounting plate, 4011, a connecting column, 4012, a circular ring piece, 4013, a limiting block, 4014, a first reset spring, 402, a multi-nozzle spray head, 403, a scraper, 404, a template, 4041 and an opening;

5. The device comprises a transfer part, a first flat plate, 502, a transfer fork, 503, a third motor, 504 and a third telescopic part;

6. Clamping piece 601, second sliding block 602, small rack 603, L-shaped plate 604, clamping plate 605, seventh motor 606, eighth motor 607, seventh expansion piece;

7. Mounting parts, 701, L-shaped frames, 702, iron shell placing tables, 703, long plates, 704 and sixth telescopic parts;

8. pressing piece 801, second plate 802, abnormal plate 803, fifth expansion piece 804, pressing plate;

9. Cleaning piece 901, wiping piece 902, eighth telescoping piece.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the drawings.

The terms of the directions such as "up", "down", "left", "right", "front", "rear", "top", "bottom" and the like in the invention are all based on the directions defined by the cross-shaped direction marks in fig. 8. The invention is described based on the limitation, and the represented orientation is not changed along with the angle change of the figure.

Definition of related terms in the present invention:

(1) Iron shell parts, namely iron shell, iron shell suite and connector, and the common brand is I-PEX;

(2) And FPC Flexible Printed Circuit, flexible printed circuit board.

As shown in fig. 6, 7, 8 and 9, the invention provides an automatic soldering device for iron shell parts based on SMT printing, which is characterized by comprising an assembly table 2 for placing a primary assembly and a reflow oven 3 for heating and soldering the assembly. Four sides of the assembly table 2 are each provided with a shutter that can reciprocate in a direction perpendicular to the sides. The reflow oven 3 includes a placement table 301 and a base 302 for placing the preliminary assembly or the assembly, which can slide reciprocally along the length direction of the reflow oven 3, the placement table 301 is slidably mounted on the top of the base 302, and the front side of the top of the base 302 is provided with a hearth 303 for heating and welding the assembly placed by the placement table 301. The oven door of the oven cavity 303 is located at the left side of the oven cavity 303, and can rotate around the up-down direction, and the oven door is closed after the placing table 301 enters the oven cavity. The base 302 is rotatably provided with a horizontal first screw rod capable of rotating around the left-right direction and a horizontal first motor for driving the first screw rod to rotate around the left-right direction, the first screw rod is provided with a first screw rod nut matched with the first screw rod, and the first screw rod nut is fixedly connected with the bottom of the placing table 301.

As shown in fig. 5,6, 7, 8, 10, 11, 12, 13, and 15, the reflow oven 3 is mounted with an applicator 4 capable of applying solder paste to the preliminary assembly placed on the placement stage 301. The solder paste was 0.18mm steel plate printed solder paste. The smearing piece 4 comprises a mounting plate 401 capable of lifting, a first sliding block capable of sliding back and forth is mounted at the bottom of the mounting plate 401, a multi-nozzle spray head 402 for spraying soldering paste and a scraper 403 capable of lifting are mounted on the first sliding block, a feeding port of the multi-nozzle spray head 402 is communicated with a soldering paste barrel through a conveying pipe, and the soldering paste barrel is communicated with a gas tank through a breather pipe. The vent pipe is provided with a pressure regulating valve for accurately controlling the air pressure. The top of the hearth 303 of the reflow oven 3 is provided with a first mounting frame, and a vertical first telescopic member for driving the mounting plate 401 to lift is fixedly mounted on the first mounting frame. The first sliding block is provided with a vertical second telescopic piece for driving the scraper 403 to lift. The bottom of mounting panel 401 is provided with horizontal second lead screw that can rotate around left and right directions, installs the horizontal second motor that is used for driving the second lead screw around fore-and-aft direction pivoted on the mounting panel 401, is provided with the second lead screw nut with second lead screw assorted on the second lead screw, and second lead screw nut and the top fixed connection of first slider. A template 404 is arranged below the scraper 403, the template 404 is fixedly connected with the bottom of the mounting plate 401 through four connecting columns 4011, a plurality of holes 4041 for solder paste to pass through are formed in the template 404, the holes 4041 are square structures, and the size of the holes 4041 is 0.8mm x 0.8mm. The connecting columns 4011 are fixedly sleeved with circular ring pieces 4012, limiting blocks 4013 used for limiting four corners of an assembly piece are respectively sleeved outside the four connecting columns 4011 in a sliding mode, first reset springs 4014 are sleeved outside parts, located between the circular ring pieces 4012 and the limiting blocks 4013, of the connecting columns 4011, the tops of the first reset springs 4014 are fixedly connected with the bottoms of the circular ring pieces 4012, and the bottoms of the first reset springs 4014 are fixedly connected with the tops of the limiting blocks 4013.

As shown in fig. 6,7, 8, 14, 16, 17 and 18, a transfer member 5 capable of transferring a preliminary assembly or an assembly placed on the assembly table 2 to the placement table 301 and transferring a preliminary assembly coated with solder paste placed on the placement table 301 to the assembly table 2 is provided beside the assembly table 2, the transfer member 5 includes a first plate 501 capable of rotating in the up-down direction and lifting, a vertical third motor 503 for driving the first plate to rotate in the up-down direction, and a vertical third telescopic member 504 for driving the third motor 503 to lift, and a transfer fork 502 for transferring the preliminary assembly or the assembly is provided on the top of the first plate 501 capable of reciprocally sliding in the longitudinal direction of the first plate 501. The top of the first flat plate 501 is provided with a horizontal third screw rod capable of rotating around the left-right direction, the first flat plate 501 is provided with a horizontal fourth motor for driving the third screw rod to rotate around the front-back direction, the third screw rod is provided with a third screw rod nut matched with the third screw rod, and the third screw rod nut is fixedly connected with the bottom of the transfer fork 502. The transfer fork 502 is of a U-shaped structure and comprises two vertical ends and one horizontal end, the vertical end of the transfer fork 502 positioned below is composed of two mutually parallel strip-shaped plates, the tops of the assembly table 2 and the placement table 301 are respectively provided with a sliding groove for each strip-shaped plate to slide along the length direction of the assembly table 2 or the placement table 301, and the vertical end of the transfer fork 502 positioned above is provided with a pressing piece 8 for pressing an iron shell piece. The pressing piece 8 comprises a second flat plate 801 capable of lifting, a fourth telescopic piece used for driving the second flat plate 801 to lift is fixedly arranged at the vertical end, above the transfer fork 502, of the second flat plate 801, a special-shaped plate 802 capable of moving oppositely or reversely is arranged on the second flat plate 801, and two horizontal fifth telescopic pieces 803 used for driving the two special-shaped plates 802 to move oppositely or reversely are arranged on the second flat plate 801. The bottom of the profiled plate 802 is fitted with a push plate 804 corresponding to the number and position of the iron shells 104 mounted on the assembly.

As shown in fig. 6, 7, 8, 19, 20, and 21, the mounting member 7 for mounting the iron case 104 to the preliminary assembly member to which the solder paste is applied placed on the assembly table 2 is further provided beside the assembly table 2. The mounting member 7 includes an L-shaped frame 701 capable of moving back and forth, the L-shaped frame 701 is composed of a lateral end and a vertical end, an iron case placing table 702 for placing a plurality of iron cases 104 is provided beside the vertical end of the L-shaped frame 701, a long plate 703 capable of lifting is mounted at the bottom of the lateral end of the L-shaped frame 701, and a holding member 6 capable of sliding left and right for holding the iron case 104 on the iron case placing table 702 is mounted at the bottom of the long plate 703. A vertical plate is fixedly arranged on one side of the placing table 702, which is close to the vertical end of the L-shaped frame 701, a horizontal fourth screw rod is arranged on the vertical plate, a horizontal fifth motor for driving the fourth screw rod to rotate around the front-back direction is arranged on the vertical plate, a fourth screw rod nut matched with the fourth screw rod is arranged on the fourth screw rod, and the fourth screw rod nut is fixedly connected with the vertical end of the L-shaped frame 701. A sixth telescopic member 704 for driving the long plate 703 to lift is provided at the lateral end of the L-shaped frame 701. The bottom of the long plate 703 is rotatably provided with a horizontal fifth screw, the long plate 703 is provided with a horizontal sixth motor for driving the fifth screw to rotate around the left-right direction, the fifth screw is provided with a fifth screw nut matched with the fifth screw, and the fifth screw nut is fixedly connected with the clamping piece 6. The clamping piece 6 comprises a second sliding block 601 capable of sliding at the bottom of the long plate 703, and a small rack 602 capable of rotating around the vertical direction, a horizontal rotating shaft is arranged on the small rack 602, an L-shaped plate 603 is fixedly arranged on the rotating shaft, the L-shaped plate 603 is composed of a long end and a short end, a clamping plate 604 capable of moving back and forth in the direction perpendicular to the short end of the L-shaped plate 603 is vertically arranged on the long end of the L-shaped plate 603, and the iron shell 104 can be clamped between the clamping plate 604 and the short end of the L-shaped plate 603 through the cooperation of the clamping plate 604 and the short end of the L-shaped plate 603. A seventh motor 605 for driving the small rack 602 to rotate up and down is fixedly installed at the bottom of the second slider 601. An eighth motor 606 for driving the rotating shaft to rotate is mounted on the small frame 602. A seventh telescopic member 607 for driving the clamping plate 604 to lift is fixedly installed on the long end of the L-shaped plate 603. The vertical end of the L-shaped frame 701 is mounted with a cleaning member 9 for cleaning the iron case member held by the holding member 6. The cleaning member 9 comprises a wiping block 901 capable of extending into the iron shell member 104 and capable of reciprocating along the direction perpendicular to the vertical end of the L-shaped frame 701, the wiping block 901 is a sponge, and a horizontal eighth telescopic member 902 for driving the wiping block 901 to reciprocate along the direction perpendicular to the vertical end of the L-shaped frame 701 is fixedly arranged on the vertical end of the L-shaped frame 701.

The working principle of the invention is as follows, as shown in fig. 1,2, 3, 4 and 5, an assembled bakelite base 1011 is firstly placed on an assembling table 2, then a magnetic aluminum plate carrier 1012 is placed on the assembled bakelite base 1011, a groove 10122 for avoiding the position of an iron shell is formed on the magnetic aluminum plate carrier 1012, positioning PINs on the assembled bakelite base 1011 are respectively inserted into positioning PIN holes 10121 of each avoiding base of the magnetic aluminum plate carrier 1012, the diameter of the positioning PINs 10111 is 4.1mm, and an FPC1013 is placed on the magnetic aluminum plate carrier 1012, thus obtaining the initial assembly.

The fourth motor starts to drive the third screw rod to rotate, so that the third screw rod nut moves towards the direction close to the assembly table 2, the transfer fork 502 is driven to approach the assembly table 2, the strip-shaped plates of the transfer fork 502 are respectively inserted into the two sliding grooves of the assembly table 2, the expansion end of the third expansion piece 504 stretches, the third motor 503 is driven to rise, the first flat plate 501 is driven to rise, the transfer fork 502 is driven to rise, and the two strip-shaped plates of the transfer fork 502 can bring the primary assembly piece to rise. The fourth motor is reversed to drive the transfer fork 502 to move towards the direction away from the assembly table 2, after the transfer fork 502 returns to the initial position, the third motor 503 rotates to drive the transfer fork 502 to rotate 90 degrees, the opening of the transfer fork 502 faces the placement table 301, the third motor 503 stops rotating, the fourth motor is started to drive the third screw rod to rotate, the transfer fork 502 approaches the placement table 301, after the transfer fork 502 completely reaches the upper part of the placement table 301, the telescopic end of the third telescopic piece 504 is shortened, the transfer fork 502 is driven to descend, the strip-shaped plates of the transfer fork 502 are respectively inserted into two sliding grooves of the placement table 301 until the bottom of the initial assembly part contacts the top of the placement table 301, the fourth motor is reversed to drive the transfer fork 502 to be away from the placement table 301 and return to the initial position.

The expansion end of the first expansion member stretches to drive the mounting plate 401 to move downwards, the bottoms of the four limiting blocks 4013 can contact the top of the placing table 301 firstly, the assembly is limited in the four limiting blocks 4013, the assembly is prevented from being displaced when the solder paste is scraped, the limiting blocks 4013 do not move downwards any more under the limitation of the placing table 301, the mounting plate 401 still moves downwards to drive the connecting columns 4011 to slide downwards in the limiting blocks, the first reset spring 4014 is compressed, and after the bottom of the template 404 contacts the top of the assembly, the expansion end of the first expansion member stays at the position. The telescoping end of the second telescoping member extends, driving the scraper 403 downward until it is moved into position, where it stays. The air tank is used for introducing air into the soldering paste barrel through the air pipe to press the soldering paste into the conveying pipe, the soldering paste is finally sprayed out of the nozzle of the multi-nozzle spray head, the second motor drives the second screw rod to rotate, so that the second screw rod nut slides on the second screw rod, the first sliding block slides backwards, the scraper 403 is driven to slide backwards on the top of the template 404, the soldering paste is pressed into the assembly through the holes 4041 on the template 404, and a soldering paste pattern consistent with the shape of the holes 4041 is formed. The telescopic end of the second telescopic piece is shortened, the scraper 403 is driven to ascend and return to the initial position, and the second motor is reversed, so that the first sliding block slides forwards and returns to the initial position. Simultaneously, the telescopic end of the first telescopic piece is shortened, the mounting plate 401 is driven to move downwards, each connecting column 4011 slides upwards in each limiting block 4013, the first reset spring 4014 gradually returns to a natural extension state, and the limiting blocks 4013 are driven to slide upwards until the mounting plate 401 returns to the initial position.

The fourth motor rotates to drive the transfer fork 502 to be close to the placing table 301, the strip-shaped plates of the transfer fork 502 are respectively inserted into the two sliding grooves of the placing table 301, then the telescopic ends of the third telescopic pieces 504 are extended to drive the transfer fork 502 to ascend, so that the primary assembly piece coated with the soldering paste ascends along with the transfer fork 502, the fourth motor rotates reversely, the transfer fork 502 is far away from the placing table 301 and returns to the initial position, the third motor 503 rotates to drive the transfer fork 502 to rotate 90 degrees, the opening faces the assembling table 2, the transfer fork 502 is firstly close to the assembling table 2 and descends, and after the bottom of the primary assembly piece coated with the soldering paste contacts the top of the assembling table 2, the transfer fork 502 is far away from the assembling table until the primary assembly piece returns to the initial position.

The expansion end of the sixth expansion piece 704 extends to drive the long plate 703 to descend, the seventh motor 605 is started to drive the L-shaped plate 603 to rotate, the opening of the short ends of the clamping plate 604 and the L-shaped plate 603 faces the iron shell placing table 702, the expansion end of the seventh expansion piece 607 extends to reduce the distance between the clamping plate 604 and the short end of the L-shaped plate 603, and the iron shell 104 is clamped. After the iron shell 104 is clamped by the clamping piece 6, the telescopic end of the sixth telescopic piece 704 is lifted to drive the long plate 703 to lift, the seventh motor 605 drives the L-shaped plate 603 to rotate, the opening of the short end of the clamping plate 604 and the L-shaped plate 603 faces the vertical end of the L-shaped frame 701, the second sliding block 601 slides on the long plate 703 towards the direction close to the vertical end of the L-shaped frame 701, the iron shell 104 clamped by the clamping piece 6 is contacted with the cleaning piece 9, the eighth telescopic piece 902 is continuously stretched and shortened, and the wiping block 901 is driven to wipe the iron shell 104. The expansion end of the sixth expansion piece 704 rises to drive the long plate 703 to continuously rise, the sixth motor is started to drive the fifth screw rod to rotate, the fifth screw rod nut moves towards the direction close to the assembly table 2, therefore, the clamping piece 6 moves towards the assembly table 2, after the clamping piece moves to the position above the mounting hole 10131, the expansion end of the sixth expansion piece 704 stretches to drive the long plate 703 to descend, the sixth motor drives the fifth screw rod to rotate, the clamping piece 6 moves towards the direction close to the connecting position until the iron shell 104 is mounted on the connecting position, the expansion end of the seventh expansion piece 607 shortens, the distance between the clamping plate 604 and the short end of the L-shaped plate 603 increases, the iron shell 104 is not clamped any more, the seventh motor 605 enables the opening of the short end of the clamping plate 604 and the L-shaped plate 603 to face the iron shell placing table 702, the expansion end of the sixth expansion piece 704 rises to drive the long plate 703 to rise, and the clamping piece 6 returns to the initial position.

The above process is repeated until all of the eight iron cases 104 are mounted on the FPC1013, resulting in an assembly. The transfer fork 502 is close to the assembly table 2, the telescopic end of the fourth telescopic member extends to drive the second flat plate 801 to descend, each pressing plate 804 descends and enters each mounting hole 10131, the telescopic end of the fifth telescopic member 803 extends to drive the two special-shaped plates 802 to move in opposite directions, and each pressing plate 804 presses the iron shell on the FPC 1013. Then, the transfer fork 502 rises to drive the assembly to rise, then, the transfer fork 502 is far away from the assembly table 2, after returning to the initial position, the transfer fork 502 rotates 90 degrees towards the placement table 301, the transfer fork 502 is close to the placement table 301, the transfer fork 502 descends, after the bottom of the assembly contacts with the top of the placement table 301, the telescopic ends of the fifth telescopic piece 803 shorten, the two profiled plates 802 are driven to move back, the pressing plates 804 leave the iron shell 104, the telescopic ends of the fourth telescopic piece shorten, the second plate 801 is driven to rise, the transfer fork 502 is far away from the placement table 301, returns to the initial position, and rotates 90 degrees towards the assembly table 2.

Placing the assembly on the placing table 301, starting a first motor, driving a first screw rod to rotate, sliding a first screw rod nut on the first screw rod to drive the placing table 301 to slide forwards, stopping rotating the first motor after entering a welding position in the hearth 303, stopping rotating the placing table 301 at the welding position, closing a furnace door, heating and welding the assembly by temperature rise of the hearth 303, setting the temperature peak at 255 ℃, setting the reflux time at 60-70 s, opening the furnace door after welding, and starting the first motor to drive the first screw rod to rotate reversely to enable the placing table 301 to return to the processing position, and stopping at the position.

The present invention is not limited to the specific configuration shown in the drawings in the above embodiment, and various modifications may be made thereto within the knowledge of those skilled in the art.

Claims (8)

1. An automatic welding device for iron shell parts based on SMT printing is characterized by comprising an assembly table (2) for placing a primary assembly part and a reflow oven (3) for heating and welding the assembly part;

The reflow oven (3) comprises a placing table (301) capable of sliding back and forth along the length direction of the reflow oven (3) and used for placing the primary assembly or the assembly, wherein an smearing piece (4) capable of smearing soldering paste on the primary assembly placed on the placing table (301) is arranged on the reflow oven (3);

A transfer member (5) which can transfer the primary assembly or the assembly placed on the assembly table (2) to the placement table (301) and can transfer the primary assembly coated with the solder paste placed on the placement table (301) to the assembly table (2) is arranged beside the assembly table (2);

a mounting piece (7) for mounting the iron shell piece (104) to the primary assembly piece coated with the soldering paste placed on the assembly table (2) is also arranged beside the assembly table (2);

The mounting piece (7) comprises an L-shaped frame (701) capable of moving back and forth, the L-shaped frame (701) is composed of a transverse end and a vertical end, an iron shell placing table (702) for placing a plurality of iron shells (104) is arranged beside the vertical end of the L-shaped frame (701), a long plate (703) capable of lifting is arranged at the bottom of the transverse end of the L-shaped frame (701), and a clamping piece (6) capable of sliding left and right and used for clamping the iron shells (104) on the iron shell placing table (702) is arranged at the bottom of the long plate (703);

The clamping piece (6) comprises a second sliding block (601) capable of sliding at the bottom of the long plate (703), and a small rack (602) capable of rotating around the upper and lower directions, a horizontal rotating shaft is arranged on the small rack (602), an L-shaped plate (603) is fixedly arranged on the rotating shaft, the L-shaped plate (603) is composed of a long end and a short end, and a clamping plate (604) capable of moving back and forth in the direction perpendicular to the short end of the L-shaped plate (603) is vertically arranged on the long end of the L-shaped plate (603).

2. An automated soldering device for iron shell parts based on SMT printing according to claim 1, characterised in that the reflow oven (3) comprises a base (302), a placement table (301) is slidably mounted on top of the base (302), the front side of the top of the base (302) is provided with a hearth (303) for heating the assembly placed by the placement table (301).

3. An automated soldering apparatus for iron shell parts based on SMT printing according to claim 1, wherein the painting member (4) comprises a mounting plate (401) capable of lifting, a first slider capable of sliding back and forth is mounted at the bottom of the mounting plate (401), and a multi-nozzle (402) for ejecting solder paste and a scraper (403) capable of lifting are mounted on the first slider;

A template (404) is arranged below the scraper (403), and the template (404) is fixedly connected with the bottom of the mounting plate (401) through four connecting columns (4011);

The connecting columns (4011) are fixedly sleeved with circular ring pieces (4012) respectively, limiting blocks (4013) used for limiting four corners of an assembly piece are respectively sleeved outside the four connecting columns (4011) in a sliding mode, first reset springs (4014) are sleeved outside parts, located between the circular ring pieces (4012) and the limiting blocks (4013), of the connecting columns (4011), the tops of the first reset springs (4014) are fixedly connected with the bottoms of the circular ring pieces (4012), and the bottoms of the first reset springs (4014) are fixedly connected with the tops of the limiting blocks (4013).

4. An automated welding device for iron shell parts based on SMT printing according to any one of claims 1-3, wherein the transferring member (5) comprises a first plate (501) capable of rotating up and down and lifting, and a transferring fork (502) capable of sliding back and forth along the length direction of the first plate (501) and used for transferring the primary assembly or the assembly is arranged at the top of the first plate (501).

5. The automatic welding device for iron shell parts based on SMT printing according to claim 4, wherein the transfer fork (502) is of a U-shaped structure and comprises two vertical ends and a transverse end, the vertical end of the transfer fork (502) positioned below is composed of two mutually parallel strip-shaped plates, and the tops of the assembly table (2) and the placement table (301) are respectively provided with a sliding groove for each strip-shaped plate to slide along the length direction of the assembly table (2) or the placement table (301);

the vertical end of the transfer fork (502) above is provided with a pressing piece (8) for pressing the iron shell piece.

6. The automatic welding device for the iron shell parts based on SMT printing according to claim 5, wherein the pressing piece (8) comprises a second flat plate (801) capable of lifting, a special-shaped plate (802) capable of moving oppositely or back is arranged on the second flat plate (801), and pressing plates (804) corresponding to the number and positions of the iron shell parts (104) arranged on the assembly are arranged at the bottom of the special-shaped plate (802).

7. An automated welding device for iron shells based on SMT printing according to claim 1, characterised in that the vertical end of the L-shaped frame (701) is provided with cleaning elements (9) for cleaning the iron shells gripped by the gripping elements (6).

8. An automated welding device for iron shells based on SMT printing according to claim 7, wherein the cleaning member (9) comprises a wiping block (901) capable of extending into the iron shell (104) and capable of moving reciprocally in a direction perpendicular to the vertical end of the L-shaped frame (701), and a horizontal eighth telescopic member (902) for driving the wiping block (901) to move reciprocally in a direction perpendicular to the vertical end of the L-shaped frame (701) is fixedly mounted on the vertical end of the L-shaped frame (701).