CN113068323B

CN113068323B - Welding jig convenient to fixed PCB board

Info

Publication number: CN113068323B
Application number: CN202110247603.1A
Authority: CN
Inventors: 肖钰浩
Original assignee: Individual
Current assignee: Gao Yanni
Priority date: 2021-03-06
Filing date: 2021-03-06
Publication date: 2021-12-07
Anticipated expiration: 2041-03-06
Also published as: CN114364156A; CN113068323A; CN114364156B

Abstract

The invention belongs to the technical field of PCB (printed circuit board) processing equipment, and particularly relates to a welding jig convenient for fixing a PCB, which comprises a welding plate; the welding plate is provided with a welding groove and a fixing piece; the fixing piece comprises a support; a pair of symmetrically distributed supports is fixedly connected to the welding plate; a first through groove is formed in the support, and a pair of rotating shafts which are symmetrically distributed are rotationally connected in the first through groove; a telescopic rod is fixedly connected to the rotating shaft, and a hydraulic cylinder is fixedly connected to the end part, far away from the rotating shaft, of the telescopic rod; a hydraulic rod is arranged in the hydraulic cylinder and penetrates through the telescopic rod to be fixedly connected with a fixing plate; a group of placing grooves is formed in the welding plate; the invention provides a welding jig convenient for fixing a PCB (printed circuit board), which aims to solve the problems that when the PCB is welded and fixed, fixing points are fixed and unchanged, the fixing effect on some special-shaped PCBs is poor, the positions of the fixing points cannot be adjusted, and the positions covered by the fixing points cannot be welded.

Description

Welding jig convenient to fixed PCB board

Technical Field

The invention belongs to the technical field of PCB (printed circuit board) processing equipment, and particularly relates to a welding jig convenient for fixing a PCB.

Background

With the rapid development of social economy, printed circuit boards, also known as printed circuit boards, are providers of electrical connections for electronic components. The printed circuit board is generally denoted as "PCB" and cannot be called "PCB board". Its development has been over 100 years old; the design of the method is mainly layout design; the circuit board has the main advantages of greatly reducing errors of wiring and assembly, and improving the automation level and the production labor rate. The circuit board can be divided into a single-sided board, a double-sided board, a four-layer board, a six-layer board and other multi-layer circuit boards according to the number of the layers of the circuit board. Since printed circuit boards are not typical end products, they are somewhat confusing in the definition of names such as: the motherboard for a personal computer is called a motherboard and cannot be directly called a circuit board, and although the circuit board exists in the motherboard, the motherboard is different from the motherboard, so that the two aspects cannot be said to be the same when evaluating the industry.

Also some technical scheme about PCB board processing equipment technique have appeared among the prior art, chinese patent as application number 2020201410803 discloses a PCB board positioning jig for communication, the package includes the positioning seat, two spouts have been seted up at the middle part on positioning seat top, the inside sliding connection of two spouts has four sliders, the both sides cell wall of two spouts alternates through inlaying the bearing of establishing and is connected with positive and negative lead screw, the motor groove has all been seted up to one side of two spouts, the equal fixed mounting in inside of two motor grooves has first step motor, the positive and negative lead screw one end fixed connection that the output shaft of two first step motors corresponds respectively.

In the prior art, when a PCB is welded and fixed, fixing points are fixed and unchangeable, so that the fixing effect of the special-shaped PCB is poor, the positions of the fixing points cannot be adjusted, the positions covered by the fixing points cannot be welded, and the welding effect of the PCB is influenced.

Disclosure of Invention

The welding jig is convenient for fixing the PCB, and aims to make up for the defects of the prior art and solve the problems that when the PCB is welded and fixed, fixing points are fixed and unchangeable, the fixing effect of some special-shaped PCBs is poor, the positions of the fixing points cannot be adjusted, the positions covered by the fixing points cannot be welded, and the welding effect of the PCB is affected.

The technical scheme adopted by the invention for solving the technical problems is as follows: the welding jig convenient for fixing the PCB comprises a welding plate; the welding plate is provided with a welding groove and a fixing piece; the fixing piece comprises a support; a pair of symmetrically distributed supports is fixedly connected to the welding plate; a first through groove is formed in the support, and a pair of rotating shafts which are symmetrically distributed are rotationally connected in the first through groove; a telescopic rod is fixedly connected to the rotating shaft, and a hydraulic cylinder is fixedly connected to the end part, far away from the rotating shaft, of the telescopic rod; a hydraulic rod is arranged in the hydraulic cylinder and penetrates through the telescopic rod to be fixedly connected with a fixing plate; a group of placing grooves is formed in the welding plate; when the PCB welding fixture is used, in the prior art, when the PCB is welded and fixed, the fixing points are fixed and unchangeable, so that the fixing effect on some special-shaped PCBs is poor, the positions of the fixing points cannot be adjusted, the positions covered by the fixing points cannot be welded, and the welding effect of the PCBs is influenced, therefore, the PCB welding fixture utilizes the fixing piece to fix the PCB, the telescopic rod can rotate on the support and can also stretch out and draw back during the fixing process, the positions of the fixing points can be adjusted, the fixing piece not only has good fixing effect on the special-shaped PCBs, but also can comprehensively weld and adjust the PCB, the influence of the covering surfaces of the fixing points on the welding effect of the PCB is avoided, after the telescopic rod is adjusted to the position needing to be fixed, the hydraulic cylinder is started, the fixing plate is driven to press down to fix the PCB through the hydraulic rod, and the PCBs with different thicknesses can be fixed through adjusting the pressure of the hydraulic cylinder, the application range is enlarged.

Preferably, a first groove is formed in the center of the bottom end of the fixing plate; the bottom of the first groove is fixedly connected with a top block through a spring; a first cavity is formed in the top block; a first elastic curved membrane is fixedly connected in the first cavity, and the curved direction of the first elastic curved membrane faces downwards; a group of first air outlet holes are formed in the side wall of the first cavity, and the first air outlet holes are communicated with a closed cavity formed by the first elastic curved membrane and the side wall of the bottom end of the first cavity; a pressure rod is fixedly connected to the bottom of the first groove, the bottom end of the pressure rod extends into the first cavity and is fixedly connected to the first elastic curved membrane, and the pressure rod slides on a penetrating point on the top block; the during operation pushes down the in-process at the fixed plate, and the kicking block removes to first recess tank bottom department, and the kicking block removes the in-process, and the depression bar can extrude the crooked membrane downstream of first elasticity this moment, extrudees the closed chamber of the crooked membrane of first elasticity and first cavity bottom lateral wall, and gas is through first venthole blowout, and the fixed range of clearance fixed plate keeps the clean and tidy of the fixed cover face of PCB board, prevents that impurity on the fixed cover face of PCB board from haring PCB board surface at fixed extrusion in-process.

Preferably, the top block is connected to the side wall of the first groove in a sealing and sliding manner; a group of second grooves are formed at the bottom end of the fixing plate around the first grooves; the bottom of the second groove is fixedly connected with an auxiliary block through a spring; the auxiliary block is connected in the second groove in a sealing and sliding manner; the second groove and the first groove are communicated with each other through a hose; the during operation, in the fixed course of fixed plate, the stationary plane is great, whole covering can lead to easily piling up on the covering surface at the welding heat, so move the in-process on the kicking block, gas in the first recess passes through in the hose gets into the second recess, promote the outside removal of auxiliary block, when kicking block and auxiliary block contact the PCB board simultaneously, the PCB board is just in time fixed to this moment, and have the space between auxiliary block and the kicking block this moment, make things convenient for the PCB board can not pile up on the covering surface at welding in-process heat, can dispel the heat fast.

Preferably, a rubber layer is fixedly connected to the bottom end of the auxiliary block; a second cavity is formed in the auxiliary block; the side wall of the second cavity is hermetically and slidably connected with a first push plate; the top end of the first push plate is fixedly connected with a first push rod, and the top end of the first push rod penetrates through the second cavity and is fixedly connected to the bottom of the second groove; the rubber layer is provided with a first through hole, and the first through hole penetrates through the bottom end of the auxiliary block and is communicated with the second cavity; the during operation, all be the pressure that gives vertical direction at fixed PCB board in-process because of kicking block and auxiliary block, the power that gives the PCB board at the welding process is the power of horizontal direction basically, for the horizontal clamping force who increases PCB, press the in-process at the auxiliary block, first push pedal can move up in the second cavity this moment, breathe in through first through-hole, in rubber layer contact PCB board in-process can extrusion deformation, the adsorption affinity of first through-hole can adsorb on PCB board surface, increase the horizontal clamping force of PCB board, welding to the PCB board provides a stable environment.

Preferably, the bottom end of the second cavity is rotatably connected with a screw rod; a third groove is formed in the bottom end of the first push rod and penetrates through the first push plate; a screw rod nut pair is fixedly connected to the side wall of the penetrating point of the first push plate, and the end part of the screw rod, far away from the bottom end of the second cavity, extends into the third groove and is connected to the screw rod nut pair; a group of fan blades is fixedly connected to the side wall of the lead screw close to the bottom end of the second cavity; when the auxiliary block is used for fixing the PCB, the auxiliary block moves downwards, the first push plate moves upwards in the second cavity, the lead screw is driven to rotate in the process of moving the first push plate upwards, the fan blades are driven to rotate by the rotation of the lead screw for sucking air, and the adsorption effect of the rubber layer on the PCB is improved; when the auxiliary block needs to be removed from fixing the PCB, the fixing plate is moved upwards at the moment, the top block moves downwards under the action of the spring, the auxiliary block moves upwards under the action of the spring, the first push plate is driven to move downwards in the second cavity simultaneously, the lead screw is driven to rotate reversely, the lead screw rotates to drive the fan blades to blow air, the airflow flow is accelerated, the adsorption effect is removed quickly, in addition, in the process of moving upwards at the auxiliary block, the first through hole blows air outwards at all times, and the quick heat dissipation effect can be achieved on the PCB after welding is completed.

Preferably, a group of fourth grooves is formed in the bottom end of the rubber layer; a second elastic curved membrane is fixedly connected in the fourth groove, and the curved direction of the second elastic curved membrane faces the groove bottom of the fourth groove; a group of friction balls is fixedly connected to the outer side wall of the second elastic curved membrane through a first connecting rod; during operation, when supplementary piece pushed down fixed PCB board, can extrude the friction ball this moment and move to fourth recess, the friction ball can be tightly laminated on the PCB board under the curved membrane's of second elasticity effect, increases the horizontal frictional force of PCB board, increases the horizontal fixation effect of PCB board.

Preferably, a group of fifth grooves is formed at the bottom end of the friction ball; a top rod is fixedly connected to the bottom of the fifth groove through a spring, and the top rod is connected to the side wall of the fifth groove in a sealing and sliding manner; the second elastic curved membrane and the bottom of the fifth groove form a closed cavity, and the closed cavity is communicated with the fifth groove; during operation, in the process that the friction ball moves towards the fourth groove, the friction ball can drive the second elastic curved film to be extruded, gas of the second elastic curved film can enter the fifth groove, the ejector rod is pushed to move outwards, the end part of the ejector rod can be pushed against the PCB, and the horizontal fixing effect of the PCB is further improved.

Preferably, the side walls of the two sides of the auxiliary block are provided with sixth grooves, the bottoms of the sixth grooves are fixedly connected with a group of elastic rods, and the end parts of the elastic rods are fixedly connected with vibration balls; a trapezoidal block is fixedly connected to the side wall of the second groove close to the bottom end, and a group of elastic salient points are fixedly connected to the side walls of the two sides of the trapezoidal block; the trapezoidal block and the sixth groove correspond to each other, and the trapezoidal block and the vibration ball are contacted with each other in the moving process of the auxiliary block; the during operation shifts up and moves down the in-process at supplementary piece, vibrations ball all can contact each other with trapezoidal piece, and vibrations ball can take place to vibrate under the effect of elasticity bump and elasticity stick, drives supplementary piece itself and takes place the vibrations effect, clears away the welding impurity on the rubber layer through vibrations, prevents that some welding impurity can depend on the rubber layer, has guaranteed PCB's fixed effect.

The invention has the following beneficial effects:

1. according to the welding jig convenient for fixing the PCB, disclosed by the invention, the PCB is fixed through the fixing piece, in the fixing process, the telescopic rod can rotate on the support and can also stretch out and draw back, so that the position of the fixing point can be adjusted, the fixing piece not only has a good fixing effect on the special-shaped PCB, but also can comprehensively perform welding adjustment on the PCB, the influence of the covering surface of the fixing point on the welding effect of the PCB is avoided, after the telescopic rod is adjusted to the position needing to be fixed, the hydraulic cylinder is started, the fixing plate is driven to press down to fix the PCB through the hydraulic rod, the PCBs with different thicknesses can be fixed through adjusting the pressure of the hydraulic cylinder, and the application range is enlarged.

2. According to the welding jig convenient for fixing the PCB, disclosed by the invention, through the mutual matching of the first push plate, the second cavity, the first through hole, the lead screw and the fan blade, the adsorption force of the auxiliary block on the PCB can be increased, the adsorption force can be quickly removed by utilizing the quick flow of air flow, and the welded PCB can be further subjected to heat dissipation.

3. According to the welding jig convenient for fixing the PCB, the vibration ball and the trapezoidal block are matched with each other, the vibration ball can vibrate under the action of the elastic salient points and the elastic rods to drive the auxiliary block to vibrate, welding impurities on the rubber layer are removed through vibration, the welding impurities are prevented from attaching to the rubber layer, and the fixing effect of the PCB is guaranteed.

Drawings

The invention will be further explained with reference to the drawings.

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

FIG. 2 is a front view of the fixing plate;

FIG. 3 is an enlarged view of area A of FIG. 2;

FIG. 4 is an enlarged view of area B of FIG. 3;

FIG. 5 is an enlarged view of area C of FIG. 3;

FIG. 6 is a cross-sectional view of a friction ball;

in the figure: 1. welding the plate; 11. welding a groove; 2. a fixing member; 21. a support; 22. a first through groove; 23. A rotating shaft; 24. a telescopic rod; 25. a hydraulic cylinder; 26. a hydraulic lever; 27. a fixing plate; 28. a placement groove; 3. a first groove; 31. a top block; 32. a first cavity; 33. a first elastic curved film; 34. a first air outlet hole; 35. a pressure lever; 4. a second groove; 41. an auxiliary block; 42. a rubber layer; 43. a second cavity; 44. a first push plate; 45. a first push rod; 46. a first through hole; 5. a third groove; 51. a lead screw; 52. A fan blade; 6. a fourth groove; 61. a second elastic curved film; 62. a first connecting rod; 63. a friction ball; 64. A fifth groove; 65. a top rod; 7. a sixth groove; 71. a trapezoidal block; 72. a vibration ball; 73. an elastic rod.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easily understood, the invention is further explained by combining the specific embodiments.

As shown in fig. 1 to 6, the welding jig for fixing a PCB of the present invention includes a welding plate 1; the welding plate 1 is provided with a welding groove 11 and a fixing piece 2; the fixing member 2 includes a support 21; a pair of symmetrically distributed supports 21 is fixedly connected to the welding plate 1; a first through groove 22 is formed in the support 21, and a pair of rotating shafts 23 which are symmetrically distributed are rotatably connected in the first through groove 22; a telescopic rod 24 is fixedly connected to the rotating shaft 23, and a hydraulic cylinder 25 is fixedly connected to the end part of the telescopic rod 24 far away from the rotating shaft 23; a hydraulic rod 26 is arranged in the hydraulic cylinder 25, and the hydraulic rod 26 penetrates through the telescopic rod 24 and is fixedly connected with a fixing plate 27; a group of placing grooves 28 are formed in the welding plate 1; when the PCB welding fixture works, in the prior art, when a PCB is welded and fixed, the fixing points are fixed and unchangeable, so that the fixing effect of the special-shaped PCB is poor, the positions of the fixing points cannot be adjusted, the positions covered by the fixing points cannot be welded, and the welding effect of the PCB is influenced, therefore, the PCB is fixed by the fixing piece 2, the telescopic rod 24 can rotate on the support 21 and can also stretch and contract during the fixing process, the positions of the fixing points can be adjusted, the fixing piece 2 not only has good fixing effect on the special-shaped PCB, but also can comprehensively weld and adjust the PCB, the influence of the covering surfaces of the fixing points on the welding effect of the PCB is avoided, after the telescopic rod 24 is adjusted to the position needing to be fixed, the hydraulic cylinder 25 is started, the fixing plate 27 is driven by the hydraulic rod 26 to press and fix the PCB, the PCB boards with different thicknesses can be fixed by adjusting the pressure of the hydraulic cylinder 25, and the application range is enlarged.

As an embodiment of the present invention, a first groove 3 is formed at the center of the bottom end of the fixing plate 27; the bottom of the first groove 3 is fixedly connected with a top block 31 through a spring; a first cavity 32 is formed in the top block 31; a first elastic curved membrane 33 is fixedly connected in the first cavity 32, and the curved direction of the first elastic curved membrane 33 faces downwards; a group of first air outlet holes 34 are formed in the side wall of the first cavity 32, and the first air outlet holes 34 are communicated with a closed cavity formed by the first elastic curved membrane 33 and the side wall of the bottom end of the first cavity 32; a pressure lever 35 is fixedly connected to the bottom of the first groove 3, the bottom end of the pressure lever 35 extends into the first cavity 32 and is fixedly connected to the first elastic curved membrane 33, and the pressure lever 35 slides on a penetrating point on the top block 31; the during operation, at fixed plate 27 pushing down the in-process, kicking block 31 removes to 3 tank bottoms departments of first recess, kicking block 31 removes the in-process, depression bar 35 can extrude the crooked membrane 33 downstream of first elasticity during this time, the closed chamber of the crooked membrane 33 of first elasticity and first cavity 32 bottom lateral wall of extrusion, gaseous through the blowout of first venthole 34, clear up fixed plate 27's fixed scope, keep the clean and tidy of the fixed covering surface of PCB board, prevent that the impurity on the fixed covering surface of PCB board from haring PCB board surface at fixed extrusion in-process.

As an embodiment of the present invention, the top block 31 is connected to the side wall of the first groove 3 in a sealing and sliding manner; the bottom end of the fixing plate 27 is provided with a group of second grooves 4 around the first groove 3; an auxiliary block 41 is fixedly connected to the bottom of the second groove 4 through a spring; the auxiliary block 41 is connected in the second groove 4 in a sealing and sliding manner; the second groove 4 and the first groove 3 are communicated with each other through a hose; the during operation, at the fixed in-process of fixed plate 27, the stationary plane is great, whole covering can lead to easily piling up on the covering surface at the welding heat, so shift up the in-process at kicking block 31, gas in the first recess 3 passes through in the hose gets into second recess 4, promote supplementary piece 41 and outwards remove, when kicking block 31 and supplementary piece 41 contact the PCB board simultaneously, just in time fix the PCB board, and have the space between supplementary piece 41 and the kicking block 31 this moment, make things convenient for the PCB board can not pile up on the covering surface at welding in-process heat, can dispel the heat fast.

In one embodiment of the present invention, a rubber layer 42 is fixed to the bottom end of the auxiliary block 41; a second cavity 43 is arranged in the auxiliary block 41; a first push plate 44 is connected to the side wall of the second cavity 43 in a sealing and sliding manner; a first push rod 45 is fixedly connected to the top end of the first push plate 44, and the top end of the first push rod 45 penetrates through the second cavity 43 and is fixedly connected to the groove bottom of the second groove 4; a first through hole 46 is formed in the rubber layer 42, and the first through hole 46 penetrates through the bottom end of the auxiliary block 41 and is communicated with the second cavity 43; during operation, all give vertical direction's pressure because of kicking block 31 and auxiliary block 41 at fixed PCB board in-process, the power that gives the PCB board in welding process is the power of horizontal direction basically, for the horizontal clamping force who increases PCB, press down the in-process at auxiliary block 41, first push pedal 44 can shift up in second cavity 43 this moment, breathe in through first through-hole 46, can the extrusion deformation in rubber layer 42 contact PCB board in-process, the adsorption affinity of first through-hole 46 can adsorb on PCB board surface, increase PCB board's horizontal clamping force, welding to the PCB board provides a stable environment.

As an embodiment of the present invention, a lead screw 51 is rotatably connected to the bottom end of the second cavity 43; the bottom end of the first push rod 45 is provided with a third groove 5, and the third groove 5 penetrates through the first push plate 44; a screw nut pair is fixedly connected to the side wall of the penetrating point of the first push plate 44, and the end part of the screw 51 far away from the bottom end of the second cavity 43 extends into the third groove 5 and is connected to the screw nut pair; a set of fan blades 52 is fixedly connected to the side wall of the screw 51 near the bottom end of the second cavity 43; when the PCB is fixed by the auxiliary block 41, the auxiliary block 41 moves downwards, the first push plate 44 moves upwards in the second cavity 43, the lead screw 51 is driven to rotate in the process that the first push plate 44 moves upwards, the lead screw 51 rotates to drive the fan blades 52 to rotate to suck air, and the adsorption effect of the rubber layer 42 on the PCB is improved; when the auxiliary block 41 needs to release the fixing of the PCB, at this time, the fixing plate 27 moves upwards, the top block 31 moves downwards under the action of the spring, the auxiliary block 41 moves upwards under the action of the spring, and simultaneously drives the first push plate 44 to move downwards in the second cavity 43, so as to drive the lead screw 51 to rotate reversely, the lead screw 51 rotates to drive the fan blades 52 to blow air, so that the air flow is accelerated, the adsorption effect is quickly released, and in the process of moving upwards the auxiliary block 41, the first through holes 46 blow air all the time outwards, so that the quick heat dissipation effect can be achieved on the soldered PCB.

As an embodiment of the present invention, a group of fourth grooves 6 is disposed at the bottom end of the rubber layer 42; a second elastic curved membrane 61 is fixedly connected in the fourth groove 6, and the curved direction of the second elastic curved membrane 61 faces the groove bottom of the fourth groove 6; a group of friction balls 63 are fixedly connected to the outer side wall of the second elastic curved membrane 61 through a first connecting rod 62; during operation, when supplementary piece 41 pushed down the fixed PCB board, can extrude friction ball 63 to move in fourth recess 6 this moment, friction ball 63 can be tight laminating on the PCB board under the effect of the curved membrane 61 of second elasticity, increases the horizontal frictional force of PCB board, increases the fixed effect of level of PCB board.

As an embodiment of the present invention, a group of fifth grooves 64 is formed at the bottom end of the friction ball 63; a top rod 65 is fixedly connected to the bottom of the fifth groove 64 through a spring, and the top rod 65 is connected to the side wall of the fifth groove 64 in a sealing and sliding manner; the second elastic curved membrane 61 and the bottom of the fifth groove 64 form a closed cavity, and the closed cavity is communicated with the fifth groove 64; the during operation, in the friction ball 63 to fourth recess 6 internal motion process, can drive the crooked membrane 61 of extrusion second elasticity, the crooked membrane 61 of second elasticity gas can get into fifth recess 64 in, promote the outward movement of ejector pin 65, the tip of ejector pin 65 can push up on the PCB board, further increases the fixed effect of level of PCB board.

As an embodiment of the present invention, the side walls of the two sides of the auxiliary block 41 are provided with sixth grooves 7, and a group of elastic rods 73 is fixedly connected to the bottom of the sixth grooves 7, and the end of each elastic rod 73 is fixedly connected to a vibration ball 72; a trapezoidal block 71 is fixedly connected to the side wall of the second groove 4 close to the bottom end, and a group of elastic salient points are fixedly connected to the side walls of two sides of the trapezoidal block 71; the trapezoidal block 71 and the sixth groove 7 correspond to each other, and the trapezoidal block 71 and the vibration ball 72 contact each other during the movement of the auxiliary block 41; during operation, shift up and move down the in-process at supplementary piece 41, shake ball 72 and trapezoidal piece 71 and contact each other, shake ball 72 and can take place to shake under the effect of elasticity bump and elastic rod 73, drive supplementary piece 41 itself and take place the vibrations effect, clear away the welding impurity on the rubber layer 42 through vibrations, prevent that some welding impurity can depend on rubber layer 42, guaranteed PCB's fixed effect.

The working principle is as follows: after the telescopic rod 24 is adjusted to a position to be fixed, the hydraulic cylinder 25 is started, the fixing plate 27 is driven to press downwards through the hydraulic rod 26, in the pressing process of the fixing plate 27, the top block 31 contacts with the PCB firstly, then the top block 31 moves towards the groove bottom of the first groove 3, in the moving process of the top block 31, the pressure rod 35 extrudes the first elastic curved membrane 33 to move downwards, the first elastic curved membrane 33 and the closed cavity of the bottom end side wall of the first cavity 32 are extruded, gas is sprayed out through the first gas outlet hole 34, the fixing range of the fixing plate 27 is cleared, meanwhile, the gas in the first groove 3 enters the second groove 4 through the hose, the auxiliary block 41 is pushed to move outwards, when the top block 31 and the auxiliary block 41 contact with the PCB simultaneously, the PCB is just fixed, and at the moment, a space is reserved between the auxiliary block 41 and the top block 31, so that heat of the PCB is not accumulated on a covering surface in the welding process, the heat can be quickly dissipated; during the pressing process of the auxiliary block 41, at this time, the first push plate 44 moves upwards in the second cavity 43, the air is sucked through the first through hole 46, and during the extrusion deformation of the rubber layer 42 in contact with the PCB, the adsorption force of the first through hole 46 is adsorbed on the surface of the PCB, so that the horizontal fixing force of the PCB is increased; when the auxiliary block 41 fixes the PCB, at this time, the auxiliary block 41 moves down, the first push plate 44 moves up in the second cavity 43, the first push plate 44 drives the screw 51 to rotate during moving up, the screw 51 rotates to drive the fan blade 52 to rotate to suck air, and the adsorption effect of the rubber layer 42 on the PCB is increased; when the auxiliary block 41 needs to release the fixing of the PCB, at this time, the fixing plate 27 moves upwards, the top block 31 moves downwards under the action of the spring, the auxiliary block 41 moves upwards under the action of the spring, and simultaneously drives the first push plate 44 to move downwards in the second cavity 43, so as to drive the lead screw 51 to rotate reversely, the lead screw 51 rotates to drive the fan blades 52 to blow, so that the flow of air flow is accelerated, and the adsorption effect is quickly released, and in the process of moving the auxiliary block 41 upwards, the first through holes 46 always blow outwards, so that the quick heat dissipation effect can be achieved on the soldered PCB; move up and move down the in-process at supplementary piece 41, vibrations ball 72 all can contact each other with trapezoidal piece 71, vibrations ball 72 can take place to vibrate under the effect of elasticity bump and elasticity stick 73, drives supplementary piece 41 itself and takes place the vibrations effect, clears away the welding impurity on the rubber layer 42 through vibrations, prevents that some welding impurity can depend on rubber layer 42, has guaranteed PCB's fixed effect.

The front, the back, the left, the right, the upper and the lower are all based on the figure 1 in the attached drawings of the specification, according to the standard of the observation angle of human beings, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and so on.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations and positional relationships based on those shown in the drawings, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A welding jig convenient for fixing a PCB is characterized by comprising a welding plate (1); the welding plate (1) is provided with a welding groove (11) and a fixing piece (2); the fixing part (2) comprises a support (21); a pair of symmetrically distributed supports (21) is fixedly connected to the welding plate (1); a first through groove (22) is formed in the support (21), and a pair of rotating shafts (23) which are symmetrically distributed are rotatably connected in the first through groove (22); a telescopic rod (24) is fixedly connected to the rotating shaft (23), and a hydraulic cylinder (25) is fixedly connected to the end part, far away from the rotating shaft (23), of the telescopic rod (24); a hydraulic rod (26) is arranged in the hydraulic cylinder (25), and the hydraulic rod (26) penetrates through the telescopic rod (24) and is fixedly connected with a fixing plate (27); a group of placing grooves (28) are formed in the welding plate (1); a first groove (3) is formed in the center of the bottom end of the fixing plate (27); the bottom of the first groove (3) is fixedly connected with a top block (31) through a spring; a first cavity (32) is formed in the top block (31); a first elastic curved membrane (33) is fixedly connected in the first cavity (32), and the curved direction of the first elastic curved membrane (33) faces downwards; a group of first air outlet holes (34) are formed in the side wall of the first cavity (32), and the first air outlet holes (34) are communicated with a closed cavity formed by the first elastic curved membrane (33) and the side wall of the bottom end of the first cavity (32); a pressing rod (35) is fixedly connected to the bottom of the first groove (3), the bottom end of the pressing rod (35) extends into the first cavity (32) and is fixedly connected to the first elastic curved membrane (33), and the pressing rod (35) slides on a penetrating point on the top block (31).

2. The welding jig for fixing the PCB as claimed in claim 1 wherein the top block (31) is connected to the side wall of the first groove (3) in a sealing and sliding manner; a group of second grooves (4) are formed in the bottom end of the fixing plate (27) around the first groove (3); an auxiliary block (41) is fixedly connected to the bottom of the second groove (4) through a spring; the auxiliary block (41) is connected in the second groove (4) in a sealing and sliding manner; the second groove (4) and the first groove (3) are communicated with each other through a hose.

3. The welding jig convenient for fixing the PCB as claimed in claim 2 wherein the bottom end of the auxiliary block (41) is fixedly connected with a rubber layer (42); a second cavity (43) is formed in the auxiliary block (41); a first push plate (44) is connected to the side wall of the second cavity (43) in a sealing and sliding manner; a first push rod (45) is fixedly connected to the top end of the first push plate (44), and the top end of the first push rod (45) penetrates through the second cavity (43) and is fixedly connected to the groove bottom of the second groove (4); the rubber layer (42) is provided with a first through hole (46), and the first through hole (46) penetrates through the bottom end of the auxiliary block (41) and is communicated with the second cavity (43).

4. The welding jig convenient for fixing the PCB as claimed in claim 3 wherein the bottom end of the second cavity (43) is rotatably connected with a lead screw (51); a third groove (5) is formed in the bottom end of the first push rod (45), and the third groove (5) penetrates through the first push plate (44); a screw nut pair is fixedly connected to the side wall of the penetrating point of the first push plate (44), and the end part of the screw (51) far away from the bottom end of the second cavity (43) extends into the third groove (5) and is connected to the screw nut pair; and a group of fan blades (52) are fixedly connected to the side wall of the lead screw (51) close to the bottom end of the second cavity (43).

5. The welding jig convenient for fixing the PCB as claimed in claim 4 wherein the bottom end of the rubber layer (42) is provided with a set of fourth grooves (6); a second elastic curved membrane (61) is fixedly connected in the fourth groove (6), and the curved direction of the second elastic curved membrane (61) faces the groove bottom of the fourth groove (6); the outer side wall of the second elastic curved membrane (61) is fixedly connected with a group of friction balls (63) through a first connecting rod (62).

6. The welding jig convenient for fixing the PCB as claimed in claim 5 wherein the bottom end of the friction ball (63) is provided with a group of fifth grooves (64); a top rod (65) is fixedly connected to the bottom of the fifth groove (64) through a spring, and the top rod (65) is connected to the side wall of the fifth groove (64) in a sealing and sliding manner; the second elastic curved membrane (61) and the bottom of the fifth groove (64) form a closed cavity, and the closed cavity is communicated with the fifth groove (64).

7. The welding jig convenient for fixing the PCB as claimed in claim 6, wherein the auxiliary block (41) is provided with sixth grooves (7) on the side walls of both sides thereof, and a group of elastic bars (73) are fixedly connected to the bottom of the sixth grooves (7), and the end of the elastic bars (73) is fixedly connected with the vibration ball (72); a trapezoidal block (71) is fixedly connected to the side wall of the second groove (4) close to the bottom end, and a group of elastic salient points are fixedly connected to the side walls of the two sides of the trapezoidal block (71); the trapezoid block (71) and the sixth groove (7) correspond to each other, and the trapezoid block (71) and the vibration ball (72) are in contact with each other during the movement of the auxiliary block (41).