CN106334851A - Desktop Selective Wave Crest Welding Machine - Google Patents

Abstract

The invention discloses a desktop-type selective wave soldering machine. A movable mounting frame is installed on the upper end side of a fixed mounting seat, a movable supporting plate is installed on the movable mounting frame, and a tin pump assembly is installed on the lower end side of the movable supporting plate on the fixed mounting seat; The fixed mounting base is installed with the Y-axis driving linear module, the driving end of the Y-axis driving linear module is installed with the Z-axis driving linear module, and the movable mounting frame is installed with the X-axis driving linear module; the tin pump assembly includes a tin pump installation Rack, tin pot assembly, tin liquid pumping mechanism, tin pot assembly includes tin pot body, tin pot cover, electric heating plate, tin liquid pumping mechanism includes shell base, shell panel, drive impeller, drive shaft, Pumping drive motor, liquid tin nozzle; this desktop selective wave soldering machine is equipped with a controller. The invention has the advantages of novel structural design, high degree of automation, small occupied area, simple structure, convenient maintenance and precision welding, and can be effectively applied to small-batch PCB board welding operations.

Description

A desktop selective wave soldering machine

technical field

The invention relates to the technical field of welding equipment, in particular to a desktop selective wave soldering machine.

Background technique

The more common soldering method for DIP packaged electronic components is wave soldering, but wave soldering equipment is generally expensive, consumes a lot of solder paste, and is complicated to maintain, and is more suitable for large-scale and large-scale soldering production; and for small For batch or sample proofing, manual soldering is still used at present, which has a low degree of automation, labor costs, and welding quality is difficult to control.

In addition, traditional wave soldering is essentially dip soldering, and there is still the phenomenon of inaccurate solder joint control in the actual soldering process, that is, it is difficult to achieve precise soldering, and the tin liquid is easy to oxidize with the oxygen in the air during soldering and produce tin slag , which will lead to problems such as poor welding quality.

Based on the above situation, it can be seen that the traditional wave soldering machine has the following defects, specifically:

1. The traditional wave soldering machine adopts the dip soldering method, the welding area is wide, and the accuracy of solder joints cannot be controlled;

2. The tin furnace of the traditional wave soldering machine is an open heating mode. The molten tin liquid is easily oxidized with the oxygen in the air and produces welding slag, which affects the welding quality;

3. Traditional wave soldering machines are bulky, complex in structure, high in cost and difficult to maintain;

4. The traditional wave soldering machine is suitable for the welding of large quantities of PCB boards, but it is difficult to apply to the welding of single and small batches of PCB boards.

Contents of the invention

The purpose of the present invention is to provide a desktop selective wave soldering machine for the deficiencies of the prior art. The desktop selective wave soldering machine has novel structural design, high degree of automation, small footprint, simple structure, convenient maintenance and It can realize precision welding, and can be effectively applied to small batch PCB board welding operations.

In order to achieve the above object, the present invention is achieved through the following technical solutions.

A desktop selective wave soldering machine, including a rectangular fixed mounting base, the fixed mounting base includes a horizontally arranged mounting base bottom plate, the upper surface of the mounting base bottom plate is screwed with four rectangular distribution and sequentially The side plates of the connected mounting seats are vertically arranged respectively, and the upper end side of the fixed mounting seat can be equipped with a movable mounting frame relatively movably, and the movable mounting frame can be relatively movably equipped with a movable supporting plate. The upper surface of the base plate is equipped with a tin pump assembly on the lower end side of the movable supporting plate;

The side plate of the fixed mounting seat is equipped with a Y-axis driven linear module that moves forward and backward horizontally, and the driving end of the Y-axis driven linear module is equipped with a Z-axis driven linear module that moves up and down. The driving end of the group is connected to the movable mounting frame, and the movable mounting frame is equipped with an X-axis driving linear module that moves left and right horizontally, and the driving end of the X-axis driving linear module is connected to the movable supporting plate;

The tin pump assembly includes a tin pump mounting frame and a tin pot assembly installed on the upper end of the tin pump mounting frame. The tin pot assembly includes a tin pot body and a tin pot cover. The tin pot body has an upward opening And it is used to hold the pot body cavity for melting tin liquid, the tin pot cover plate is installed at the upper opening of the pot body cavity, and the lower surface of the tin pot body is equipped with an electric heating plate; A tin liquid pumping mechanism is embedded in the pot body accommodating cavity, and the tin liquid pumping mechanism includes a tin pump housing, and the tin pump housing includes a housing base, a housing panel screwed on the upper surface of the housing base, The shell panel is located directly below the tin pot cover and is connected to the tin pot cover. The inside of the tin pump shell is formed with an impeller installation chamber and a tin liquid pumping chamber between the shell base and the shell panel. chamber, the diversion groove connecting the impeller installation chamber and the liquid tin pumping chamber, the impeller installation chamber is relatively rotatably installed with a drive impeller, and the outer surface of the shell base is provided with a tin inlet port communicating with the impeller installation chamber. The liquid hole and the tin pot cover plate can be relatively rotatably equipped with a vertically arranged drive shaft, the upper end of the drive shaft extends to the upper end side of the tin pot cover plate, and the lower end of the drive shaft passes through the tin pot cover plate, The shell panel extends into the impeller installation chamber, and the driving impeller is clamped on the lower end of the driving shaft. The tin pump mounting frame is equipped with a pumping drive motor, and the power output shaft of the pumping drive motor is driven by the upper end of the driving shaft. Connection; the upper surface of the shell panel is provided with a tin liquid hole that communicates with the tin liquid pumping chamber, and the upper surface of the shell panel is screwed with a tin liquid nozzle that is vertically arranged and communicated with the tin liquid hole. The upper end of the liquid nozzle passes through the tin pot cover plate and extends to the upper end side of the tin pot cover plate;

The desktop selective wave soldering machine is equipped with a controller mounted on a fixed mounting base. The controller includes a controller housing, a PCB control circuit board embedded in the controller housing and electrically connected to an external power supply. The upper surface of the controller housing is equipped with a touch screen, control buttons, X-axis drive linear module, Y-axis drive linear module, Z-axis drive linear module, electric heating plate, pumping drive motor, touch screen , control button respectively PCB control circuit board electrical connection.

Wherein, the X-axis drive linear module includes an X-axis drive motor, an X-axis active synchronous pulley, and an X-axis driven drive that is horizontally spaced from the X-axis active synchronous pulley and arranged on the left and right sides of the movable mounting frame. Synchronous pulley, the power output shaft of the X-axis drive motor is connected to the X-axis active synchronous pulley, and the X-axis transmission synchronous belt is wound between the X-axis active synchronous pulley and the X-axis driven synchronous pulley. The supporting plate is connected with the X-axis transmission synchronous belt, and the X-axis driving motor is electrically connected with the PCB control circuit board.

Wherein, the Y-axis drive linear module includes a Y-axis drive motor installed on the side plate of the mounting seat, a Y-axis active synchronous pulley, and a Y-axis slave that is horizontally spaced from the front and back of the Y-axis active synchronous pulley. The power output shaft of the Y-axis driving motor is connected with the active synchronous pulley of the Y-axis. A Y-axis drive synchronous belt is wound between the active synchronous pulley of the Y-axis and the driven synchronous pulley of the Y-axis. The Y-axis The transmission synchronous belt is equipped with front and rear movable mounting plates, the Z-axis driving linear module is installed on the front and rear movable mounting plates, and the Y-axis driving motor is electrically connected to the PCB control circuit board.

Wherein, the Z-axis driving linear module includes a Z-axis driving motor installed on the front and rear movable mounting plates, the power output shaft of the Z-axis driving motor is connected with a driving screw rod arranged vertically, and the movable The mounting frame is equipped with a screw nut corresponding to the driving screw rod, and the screw nut is matched with the driving screw rod, and the Z-axis driving motor is electrically connected with the PCB control circuit board.

Wherein, the upper surface of the tin pot cover is equipped with a nitrogen protective cover which is set on the periphery of the tin liquid nozzle and is used to access nitrogen.

Wherein, the power output shaft of the pumping driving motor is drivingly connected to the upper end of the driving shaft through a chain transmission mechanism.

Wherein, the cover plate of the tin pot is provided with a temperature sensor extending into the accommodating cavity of the pot body, and the upper surface of the controller housing is also provided with a temperature controller, and the temperature sensor and the temperature controller are electrically connected to each other. connected, the temperature controller is electrically connected with the PCB control circuit board.

The beneficial effects of the present invention are: a desktop selective wave soldering machine according to the present invention, a movable mounting frame is installed on the upper end side of the fixed mounting base, the movable mounting frame is equipped with a movable pallet, and the fixed mounting base is mounted on the movable pallet The tin pump assembly is installed on the lower end side; the Y-axis drive linear module is installed on the fixed mount, the Z-axis drive linear module is installed on the drive end of the Y-axis drive linear module, and the drive end of the Z-axis drive linear module is connected to the movable installation frame connection, the movable mounting frame is equipped with an X-axis driven linear module that drives the movable pallet; the tin pump assembly includes a tin pump mounting frame, a tin pot assembly installed on the upper end of the tin pump mounting frame, and the tin pot assembly includes a tin pot Pot body, tin pot cover plate, electric heating plate, tin liquid pumping mechanism embedded in the pot body cavity of tin pot body, tin liquid pumping mechanism includes shell base, shell panel, shell base and shell The impeller installation chamber, tin liquid pumping chamber, and diversion groove are formed between the body panels. The impeller installation chamber is equipped with a drive impeller driven by a pumping drive motor and a drive shaft, and the outer surface of the shell base is opened with a tin liquid hole. , The tin liquid nozzle on the upper surface of the shell panel is equipped with a tin liquid nozzle; the desktop selective wave soldering machine is equipped with a controller. Through the above-mentioned structural design, the present invention has the advantages of novel structural design, high degree of automation, small floor space, simple structure, convenient maintenance and precision welding, and can be effectively applied to small-batch PCB board welding operations.

Description of drawings

The present invention will be further described below using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a structural schematic diagram of the tin pump assembly of the present invention.

Fig. 3 is a schematic cross-sectional view of the tin pump assembly of the present invention.

Fig. 4 is a structural schematic diagram of the liquid tin pumping mechanism of the present invention.

In Figures 1 to 4 include:

1——fixed mount 11——base plate of mount

12——Installation seat side plate 2——Active mounting frame

3——Active pallet 4——Tin pump assembly

41——Tin pump mounting bracket 42——Tin pot assembly

421——Tin pot body 4211——Pot body cavity

422——Tin pot cover 423——Electric heating plate

43——Tin Liquid Pumping Mechanism 431——Tin Pump Shell

4311——shell base 43111——tin liquid inlet hole

4312——Shell panel 43121——Tin liquid hole

4313——Impeller installation chamber 4314——Tin liquid pumping chamber

4315——Guzzle 432——Drive impeller

433——drive shaft 434——pumping drive motor

435——Tin liquid nozzle 44——Nitrogen protective cover

45——Temperature sensor 51——X-axis drive linear module

511——X-axis driving motor 512——X-axis driving synchronous pulley

513——X-axis driven synchronous pulley 514——X-axis drive synchronous belt

52——Y-axis drive linear module 521——Y-axis drive motor

522——Y axis active synchronous pulley 523——Y axis driven synchronous pulley

524——Y-axis transmission synchronous belt 525——front and rear movable mounting plate

53——Z axis drive linear module 531——Z axis drive motor

532——drive screw 533——screw nut

6——controller 61——controller shell

62——touch screen 63——control buttons

64—thermostat.

detailed description

The present invention will be described below in conjunction with specific embodiments.

As shown in Figures 1 to 4, a desktop selective wave soldering machine includes a rectangular fixed mount 1, the fixed mount 1 includes a mount base 11 arranged horizontally and horizontally, the mount base 11 The upper surface of the upper surface is screw-mounted with four mounting seat side plates 12 distributed in a rectangular shape and connected in sequence, each mounting seat side plate 12 is vertically arranged respectively, and the upper end side of the fixed mounting seat 1 can be relatively movably equipped with a movable mounting frame. 2. The movable mounting frame 2 can be relatively movably equipped with a movable supporting plate 3 , and the tin pump assembly 4 is installed on the lower end side of the movable supporting plate 3 on the upper surface of the mounting base bottom plate 11 .

Further, the side plate 12 of the fixed mounting base 1 is equipped with a Y-axis driven linear module 52 that moves forward and backward horizontally, and the driving end of the Y-axis driven linear module 52 is equipped with a Z-axis driven linear module that moves up and down. Group 53, the driving end of the Z-axis driving linear module 53 is connected to the movable mounting frame 2, and the movable mounting frame 2 is equipped with an X-axis driving linear module 51 that moves left and right horizontally, and the driving end of the X-axis driving linear module 51 is connected to the Movable pallet 3 is connected.

Further, the tin pump assembly 4 includes a tin pump mounting frame 41, a tin pot assembly 42 installed on the upper end of the tin pump mounting frame 41, the tin pot assembly 42 includes a tin pot body 421, a tin pot cover plate 422, The inside of the tin pot body 421 is provided with a pot body accommodating chamber 4211 that opens upwards and is used for containing molten tin liquid. The lower surface of 421 is equipped with an electric heating plate 423; the tin liquid pumping mechanism 43 is embedded in the pot body accommodating chamber 4211 of the tin pot body 421, and the tin liquid pumping mechanism 43 includes a tin pump housing 431, and the tin liquid pumping mechanism 43 includes a tin pump housing 431. The pump housing 431 includes a housing base 4311, a housing panel 4312 screwed on the upper surface of the housing base 4311, the housing panel 4312 is located directly below the tin pot cover 422 and the housing panel 4312 and the tin pot cover 422 Connection, the inside of the tin pump housing 431 is formed with an impeller installation chamber 4313, a tin liquid pumping chamber 4314, and a connecting impeller installation chamber 4313 and tin liquid pumping chamber between the housing base 4311 and the housing panel 4312 The diversion groove 4315 of 4314, the impeller installation chamber 4313 is relatively rotatably equipped with a driving impeller 432, the outer surface of the housing base 4311 is provided with a tin liquid inlet 43111 communicating with the impeller installation chamber 4313, and the tin pot cover The plate 422 can be relatively rotatably equipped with a vertically arranged driving shaft 433, the upper end of the driving shaft 433 extends to the upper end side of the tin pot cover 422, and the lower end of the driving shaft 433 passes through the tin pot cover 422, The shell panel 4312 extends into the impeller installation chamber 4313, the drive impeller 432 is sleeved on the lower end of the drive shaft 433, the tin pump installation frame 41 is equipped with a pumping drive motor 434, and the power output of the pumping drive motor 434 The shaft is driven and connected to the upper end of the drive shaft 433; the upper surface of the housing panel 4312 is provided with a tin liquid hole 43121 communicating with the tin liquid pumping chamber 4314, and the upper surface of the housing panel 4312 is screwed with a vertical arrangement. And the tin liquid nozzle 435 communicating with the tin liquid hole 43121 , the upper end of the tin liquid nozzle 435 passes through the tin pot cover plate 422 and extends to the upper end side of the tin pot cover plate 422 .

In addition, the desktop selective wave soldering machine is equipped with a controller 6 mounted on the fixed mounting base 1. The controller 6 includes a controller housing 61, embedded in the controller housing 61 and connected to an external power supply. The connected PCB control circuit board, the upper surface of the controller housing 61 is equipped with a touch display 62, a control button 63, an X-axis driving linear module 51, a Y-axis driving linear module 52, and a Z-axis driving linear module 53 , the electric heating plate 423, the pumping drive motor 434, the touch screen 62, and the control button 63 are electrically connected to the PCB control circuit board respectively.

Further explanation is required. As shown in FIG. 1, the X-axis drive linear module 51 is a synchronous belt-type linear module. Specifically, the X-axis drive linear module 51 includes an X-axis drive motor mounted on the movable mounting frame 2 respectively. 511, X-axis active synchronous pulley 512, X-axis driven synchronous pulley 513 horizontally spaced from the X-axis active synchronous pulley 512, the power output shaft of the X-axis driving motor 511 is driven by the X-axis active synchronous pulley 512 connection, X-axis driving synchronous belt pulley 512 and X-axis driven synchronous belt pulley 513 are wound with X-axis transmission synchronous belt 514, movable pallet 3 is connected with X-axis transmission synchronous belt 514, and X-axis driving motor 511 is connected to PCB The control circuit board is electrically connected; in addition, in addition to the above synchronous belt type linear module structure, the X-axis driving linear module 51 of the present invention can also be a ball screw secondary linear module.

As shown in Figure 1, the Y-axis drive linear module 52 of the present invention is a synchronous belt-type linear module. Specifically, the Y-axis drive linear module 52 includes Y-axis drive motors respectively installed on the side plates 12 of the mounting base. 521, the Y-axis active synchronous pulley 522, the Y-axis driven synchronous pulley 523 arranged at a horizontal interval before and after the Y-axis active synchronous pulley 522, the power output shaft of the Y-axis driving motor 521 is driven by the Y-axis active synchronous pulley 522 Connection, the Y-axis driving synchronous belt pulley 522 and the Y-axis driven synchronous belt pulley 523 are wound with a Y-axis transmission synchronous belt 524, the Y-axis transmission synchronous belt 524 is equipped with front and rear movable mounting plates 525, and the Z-axis drives the linear mold The group 53 is mounted on the front and rear movable mounting plates 525, and the Y-axis drive motor 521 is electrically connected to the PCB control circuit board. In addition, in addition to adopting the synchronous belt linear module structure above, the Y-axis driving linear module 52 of the present invention can also be a ball screw secondary linear module.

As shown in Figure 1, the Z-axis driving linear module 53 is a ball screw paired linear module. Specifically, the Z-axis driving linear module 53 includes a Z-axis driving motor 531 installed on the front and rear movable mounting plates 525, Z The power output shaft of the shaft driving motor 531 is connected with a vertically arranged driving screw mandrel 532, and the movable mounting frame 2 is equipped with a screw nut 533 corresponding to the driving screw mandrel 532, and the screw mandrel nut 533 is matched with the driving screw mandrel 532, The Z-axis drive motor 531 is electrically connected to the PCB control circuit board. In addition, in addition to adopting the above-mentioned ball screw pair linear module structure, the Z-axis driving linear module 53 of the present invention can also be a synchronous belt type linear module.

It should be further pointed out that the power output shaft of the pumping drive motor 434 of the present invention can be drivingly connected to the upper end of the driving shaft 433 through a chain transmission mechanism, a belt transmission mechanism, a synchronous belt transmission mechanism or a gear transmission mechanism.

Wherein, for the tin pot assembly 42 of the present invention, before the PCB board is welded, the tin bar is put into the pot body accommodating cavity 4211 of the tin pot pot body 421, and the PCB control circuit board controls the electric heating plate 423 to energize , the heat generated after the electric heating plate 423 is energized is conducted to the tin pot body 421, and then the tin pot body 421 is heated, and the tin bars put into the pot body accommodating cavity 4211 are heated and melted to form tin liquid .

In the working process of the present invention, the PCB board to be welded is placed on the movable pallet 3. Before the PCB board is welded, the present invention can drive the linear module 51 through the X axis to adjust the left and right positions of the PCB board, and drive the linear module through the Y axis. 52 to adjust the front and rear positions of the PCB board, and adjust the up and down position of the PCB board through the Z-axis drive linear module 53; wherein, in the process of adjusting the left and right positions of the PCB board, the X-axis drive motor 511 is driven by the X-axis active synchronous pulley 512. The synchronous belt transmission mechanism composed of the X-axis driven synchronous pulley 513 and the X-axis transmission synchronous belt 514 moves, and the X-axis transmission synchronous belt 514 drives the movable pallet 3 and the PCB board placed on the movable pallet 3 to move left and right; In the process of adjusting the upper and lower positions of the PCB board, the Z-axis driving motor 531 drives the movable mounting frame 2 to move up and down through the screw drive mechanism composed of the driving screw 532 and the screw nut 533, and the movable mounting frame 2 moving up and down drives the movable bracket The board 3 and the PCB board placed on the movable pallet 3 move up and down; in the process of adjusting the front and rear positions of the PCB board, the Y-axis drive motor 521 drives the Y-axis active synchronous pulley 522, the Y-axis driven synchronous pulley 523 and the Y-axis The synchronous belt transmission mechanism composed of transmission synchronous belt 524 acts, the Y-axis transmission synchronous belt 524 drives the front and rear movable mounting plates 525 to move back and forth, and the front and rear movable mounting plates 525 drive the Z-axis to drive the linear module 53, the movable mounting frame 2, and the movable pallet 3 and the PCB board placed on the movable pallet 3 moves back and forth.

It should be further pointed out that in the process of welding the PCB board in the present invention, the PCB board moves under the driving action of the X-axis driven linear module 51, the Y-axis driven linear module 52 and the Z-axis driven linear module 53, and makes The solder joint position of the PCB board is aligned with the tin liquid nozzle 435; in the process of realizing welding by the tin pump assembly 4, during welding, the PCB control circuit board controls the pumping drive motor 434 to start, and the power output shaft of the pumping drive motor 434 drives The driving shaft 433 rotates, and the rotating driving shaft 433 drives the driving impeller 432 in the impeller installation chamber 4313 to rotate. Under the driving action of the driving impeller 432, the tin liquid in the pot body accommodating cavity 4211 passes through the tin liquid inlet hole 43111, The impeller installation chamber 4313 and the guide groove 4315 enter into the tin liquid pumping chamber 4314, and the tin liquid entering into the tin liquid pumping chamber 4314 enters into the tin liquid nozzle 435 through the tin liquid outlet hole 43121 and Finally, it is ejected through the tin liquid nozzle 435, and the tin liquid ejected by the tin liquid nozzle 435 is a tin column of a certain height, wherein the height of the tin column can be adjusted by the controller 6 to adjust the speed of the pumping drive motor 434, and The columnar tin flow formed by the tin column facilitates precision soldering.

During the working process of the present invention, the staff inputs operation instructions and checks the welding process through the touch screen 62; in addition, the present invention can control the welding process through the control button 63, and the control button 63 of the present invention includes an emergency stop button, a Power button, start button, stop button, etc.

Based on the above situation, it can be seen that through the above structural design, the present invention has the advantages of novel structural design, high degree of automation, small footprint, simple structure, convenient maintenance and precision welding, and can be effectively applied to small batch PCB board welding Operation.

As a preferred embodiment, as shown in FIG. 2 and FIG. 3 , the upper surface of the tin pot cover plate 422 is provided with a nitrogen protective cover 44 which is set on the periphery of the tin liquid nozzle 435 and is used for nitrogen gas access. When the tin liquid nozzle 435 sprays the tin liquid, the nitrogen protection cover 44 is fed with nitrogen and the nitrogen protection cover 44 can form a nitrogen isolation space in the tin column, so as to avoid the direct contact of the tin liquid with the oxygen in the air and produce tin slag, and then It can effectively improve the welding quality.

As a preferred embodiment, as shown in Figure 1 and Figure 2, the tin pot cover plate 422 is equipped with a temperature sensor 45 extending into the pot body accommodating cavity 4211, and the upper surface of the controller housing 61 is also equipped with The temperature controller 64, the temperature sensor 45 is electrically connected to the temperature controller 64, and the temperature controller 64 is electrically connected to the PCB control circuit board.

In the working process of the present invention, the temperature sensor 45 collects the temperature signal of the tin liquid in real time and sends the temperature signal to the PCB control circuit board in real time. When the temperature of the tin liquid reaches the set value of the thermostat 64, the controller 6 controls the electric circuit board The heating plate 423 is powered off; when the temperature of the tin liquid is lower than the set value of the temperature controller 64, the PCB control circuit board controls the electric heating plate 423 to be powered on to continue heating. Therefore, the present invention can accurately and effectively control the temperature of the tin liquid.

Fund project: Dongguan Vocational and Technical College's 2016 government-school-business cooperation to carry out scientific research and service projects (No. 201604).

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limits.

Claims (7)

1. A desktop selective wave soldering machine, characterized in that: it includes a rectangular fixed mount (1), and the fixed mount (1) includes a mount base (11) arranged horizontally and horizontally. The upper surface of the seat bottom plate (11) is screw-mounted with four mounting seat side plates (12) distributed in a rectangular shape and connected in sequence. Each mounting seat side plate (12) is vertically arranged respectively, and the upper end of the mounting seat (1) is fixed The side can be equipped with a movable mounting frame (2) relatively movably, and the movable mounting frame (2) can be equipped with a movable supporting plate (3) relatively movably, and the upper surface of the mounting seat base plate (11) is on the movable supporting plate (3). ) is equipped with a tin pump assembly (4) on the lower end side; The side plate (12) of the fixed mounting base (1) is equipped with a Y-axis driving linear module (52) that moves forward and backward horizontally, and the driving end of the Y-axis driving linear module (52) is equipped with a vertical movement The Z-axis drives the linear module (53), the driving end of the Z-axis drives the linear module (53) is connected to the movable mounting frame (2), and the movable mounting frame (2) is equipped with an X-axis driving linear module that moves left and right horizontally (51), the driving end of the X-axis driving linear module (51) is connected to the movable pallet (3); The tin pump assembly (4) includes a tin pump mounting frame (41), a tin pot assembly (42) installed on the upper end of the tin pump mounting frame (41), and the tin pot assembly (42) includes a tin pot body (421 ), the tin pot cover (422), the inside of the tin pot body (421) is provided with a pot body cavity (4211) that opens upward and is used to hold molten tin liquid, and the tin pot cover (422) covers At the upper opening of the pot body accommodating cavity (4211), an electric heating plate (423) is installed on the lower surface of the tin pot body (421); the pot body accommodating cavity (4211) of the tin pot body (421) A tin liquid pumping mechanism (43) is embedded inside, and the tin liquid pumping mechanism (43) includes a tin pump housing (431), and the tin pump housing (431) includes a housing base (4311), screwed on The shell panel (4312) on the upper surface of the shell base (4311), the shell panel (4312) is located directly below the tin pot cover (422) and the shell panel (4312) is connected to the tin pot cover (422), The interior of the tin pump housing (431) is formed between the housing base (4311) and the housing panel (4312) with an impeller installation chamber (4313), a tin liquid pumping chamber (4314), and a connected impeller installation chamber (4313) and the diversion groove (4315) of the liquid tin pumping chamber (4314), the impeller installation chamber (4313) is relatively rotatably equipped with a driving impeller (432), and the outer shell base (4311) There is a tin liquid inlet hole (43111) connected to the impeller installation chamber (4313) on the surface, and the tin pot cover plate (422) is relatively rotatably equipped with a vertically arranged drive shaft (433), and the drive shaft (433 ) extends to the upper end side of the tin pot cover (422), and the lower end of the drive shaft (433) passes through the tin pot cover (422) and the shell panel (4312) in sequence to extend into the impeller installation chamber (4313), the driving impeller (432) is sleeved on the lower end of the driving shaft (433), the tin pump mounting bracket (41) is equipped with a pumping drive motor (434), and the power output of the pumping drive motor (434) The shaft is drivingly connected to the upper end of the drive shaft (433); the upper surface of the shell panel (4312) is provided with a tin liquid hole (43121) communicating with the tin liquid pumping chamber (4314), and the shell panel (4312) The upper surface of the screw is equipped with a tin liquid nozzle (435) arranged vertically and communicated with the tin liquid hole (43121). The upper end of the tin liquid nozzle (435) passes through the tin pot cover (422) and extends to the tin pot The upper end side of the pot cover plate (422); The desktop selective wave soldering machine is equipped with a controller (6) mounted on a fixed mount (1), the controller (6) includes a controller housing (61), embedded in the controller housing ( 61) The PCB control circuit board inside and electrically connected to the external power supply, the upper surface of the controller housing (61) is equipped with a touch display (62), control buttons (63), and an X-axis drive linear module (51) , Y-axis drive linear module (52), Z-axis drive linear module (53), electric heating plate (423), pumping drive motor (434), touch display screen (62), and control buttons (63) respectively PCB Control circuit board electrical connections. 2. A desktop selective wave soldering machine according to claim 1, characterized in that: the X-axis driving linear module (51) includes X Shaft drive motor (511), X-axis driving synchronous pulley (512), X-axis driven synchronous pulley (513) horizontally spaced from the X-axis driving synchronous pulley (512), X-axis driving motor (511) The power output shaft of the drive is connected with the X-axis driving synchronous pulley (512), and the X-axis driving synchronous belt (514) is wound between the X-axis driving synchronous pulley (512) and the X-axis driven synchronous pulley (513). , the movable pallet (3) is connected to the X-axis transmission timing belt (514), and the X-axis drive motor (511) is electrically connected to the PCB control circuit board. 3. A desktop selective wave soldering machine according to claim 2, characterized in that: said Y-axis drive linear module (52) includes The Y-axis drive motor (521), the Y-axis driving synchronous pulley (522), the Y-axis driven synchronous pulley (523) arranged at a horizontal interval before and after the Y-axis driving synchronous pulley (522), the Y-axis drive motor (521 ) is driven and connected to the Y-axis driving synchronous pulley (522), and the Y-axis driving synchronous belt (524) is wound between the Y-axis driving synchronous pulley (522) and the Y-axis driven synchronous pulley (523). ), the Y-axis transmission synchronous belt (524) is equipped with front and rear movable mounting plates (525), the Z-axis drive linear module (53) is installed on the front and rear movable mounting plates (525), and the Y-axis drive motor (521) It is electrically connected with the PCB control circuit board. 4. A desktop selective wave soldering machine according to claim 3, characterized in that: said Z-axis drive linear module (53) includes Z The shaft drive motor (531), the power output shaft of the Z-axis drive motor (531) is connected with a vertically arranged drive screw (532), and the movable mounting bracket (2) is installed correspondingly to the drive screw (532). There is a screw nut (533), and the screw nut (533) cooperates with the driving screw (532), and the Z-axis driving motor (531) is electrically connected to the PCB control circuit board. 5. A desktop selective wave soldering machine according to claim 1, characterized in that: the upper surface of the tin pot cover (422) is equipped with a Nitrogen shield (44) for nitrogen access. 6. A desktop selective wave soldering machine according to claim 1, characterized in that: the power output shaft of the pumping drive motor (434) is connected to the upper end of the drive shaft (433) through a chain transmission mechanism External drive connection. 7. A desktop selective wave soldering machine according to claim 1, characterized in that: the tin pot cover (422) is equipped with a hole extending into the pot body cavity (4211) The temperature sensor (45), the upper surface of the controller housing (61) is also equipped with a thermostat (64), the temperature sensor (45) is electrically connected to the thermostat (64), and the thermostat (64) It is electrically connected with the PCB control circuit board.