Positioning device for PCB DIP chip welding

Abstract

The invention discloses a positioning device for PCB DIP chip welding, and relates to the field of electronic component assembling equipment.The positioning device comprises a crest welder and a conveying chain, multiple sets of bracket plates are arranged on the conveying chain, pressing pieces are distributed on the two sides of the bracket plates, positioning clamps are arranged at the bottoms of the bracket plates, and two sets of moving assemblies are arranged on the bracket plates; a mounting plate is mounted on a frame of the conveying chain, a red light lamp is mounted on the mounting plate, and the moving assembly drives the pressing piece and the positioning clamp to position; according to the positioning device for welding the DIP chip of the PCB, the bracket plate is designed to convey the PCB on the conveying chain, the positioning clamp and the pressing piece on the bracket plate are used for positioning the inserted DIP at the position of an insertion hole of the PCB, the red light lamp irradiates, insertion of a DIP pin is facilitated, the pressing piece downwards presses the upper portion of the DIP, the positioning clamp is stabilized at the position of the pin, the DIP is prevented from shaking on the PCB after being inserted, and the DIP is prevented from being damaged. When the DIP pin enters a crest welder for welding, the positioning clamp reduces dislocation of the DIP pin caused by the ion fan.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic component assembly equipment, and particularly to a positioning device for soldering DIP chips on a PCB board. Background Technique

[0002] A PCB board, i.e., a printed circuit board, is the core carrier of electronic components, and realizes the electrical connection and mechanical fixation between electronic components through conductive lines and pads. Among them, DIP is a dual in-line package in the PCB board. The pins of the DIP chip are inserted into the holes of the PCB board, and the DIP chip is fixedly installed on the PCB by soldering.

[0003] In the traditional soldering method of DIP on the PCB board, an operator uses tools to pick up the DIP chip, insert it into the holes on the PCB board, and then use a soldering gun to solder the pins of the DIP on the PCB board. In order to improve production efficiency, existing electronics factories use wave soldering. For the PCB board with DIP chips assembled and inserted, it is then soldered by a wave soldering machine. However, the PCB board with the installed DIP chips is placed on a bracket, and the bracket is transported into the wave soldering for soldering treatment through a conveyor chain. Due to the movement of the conveyor chain itself, in order to achieve the effect of eliminating static electricity, an ion blower is usually assembled at the wave soldering machine. Thus, under the action of the shaking of the conveyor chain and the ion blower, and because the pins of the DIP chip are directly inserted into the hole positions of the PCB board, the pin positions are prone to shift before soldering. Therefore, when entering the wave soldering machine for soldering, it is easy to cause misalignment of the pin soldering positions. For this reason, a positioning device for soldering DIP chips on a PCB board is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a positioning device for soldering DIP chips on a PCB board to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A positioning device for soldering DIP chips on a PCB board, including a wave soldering machine and a conveyor chain. The conveyor chain passes through the wave soldering machine. There are multiple groups of bracket plates on the conveyor chain. Placement slots for placing the PCB board are opened on the bracket plates. And pressing pieces for pressing the DIP chips are distributed on both sides of the bracket plates. A positioning clip for clamping the pins of the DIP chip is provided at the bottom of the bracket plate. Two groups of moving components are provided on the bracket plate; an installation plate is installed on the frame of the conveyor chain. A red light lamp for irradiating the mounting holes of the PCB board is installed on the installation plate. When the red light lamp irradiates the bottom of the DIP chip, the moving components drive the pressing pieces and the positioning clip for positioning; a blocking component for blocking the movement of the bracket plate is provided on the frame of the conveyor chain.

[0006] Preferably, two sets of track plates are installed at the bottom of the bracket plate. The positioning clip includes a rectangular frame sliding on the track plates. Arc-shaped clip pieces are respectively installed at both ends of the rectangular frame. A first hinge seat is connected to the bottom of one of the arc-shaped clip pieces. One end of the moving component is hinged to the first hinge seat.

[0007] Preferably, the moving component includes a magnetic suction seat installed on the bracket plate. A sliding rod is connected to the magnetic suction seat. The top of the sliding rod is connected to a pressing piece. The bottom of the sliding rod is connected to a second hinge seat. A hinge rod is hinged to the second hinge seat, and one end of the hinge rod is hinged to the first hinge seat.

[0008] Preferably, two support plates are installed on the mounting plate, and the red light lamp is installed on the two support plates. A light-shielding component covering the red light lamp is installed on the mounting plate. A driving motor is installed at the bottom of the mounting plate. The outer part of the output shaft of the driving motor is connected to a blocking component. A rotating screw rod is installed at the top of the output shaft of the driving motor, and the rotating screw rod is connected to the light-shielding component.

[0009] Preferably, the light-shielding component includes a threaded shaft sleeve sleeved on the rotating screw rod. Two groups of connecting rods are connected to the outside of the threaded shaft sleeve. A support frame is installed on the top of the mounting plate. A cross frame is installed on the support frame, and a rotating block is installed inside the cross frame. Fixed rods are installed at both ends of the cross frame and the rotating block. A covering frame is connected to the fixed rods. The connecting rod is hinged to the bottom of the fixed rod.

[0010] Preferably, the blocking component includes a double-wheel shaft sleeved on the output shaft of the driving motor. Circular holes are formed in a rectangular shape on the frame of the conveyor chain. A lifting screw rod is installed in the circular holes. A rotating shaft sleeve is installed on the frame of the conveyor chain, and threads are provided inside the rotating shaft sleeve. The rotating shaft sleeve and the double-wheel shaft are driven by a belt. A blocking rubber block is installed at the top of the lifting screw rod.

[0011] Preferably, a limit sleeve is sleeved on the lifting screw rod, and a limit rod passing through the limit sleeve is installed on the frame of the conveyor chain.

[0012] Preferably, an installation groove is formed on the frame of the conveyor chain, and a plurality of irradiation holes are formed in the inner wall of the installation groove. A box body is installed in the installation groove, and the box body is communicated with an ion blower on a wave soldering machine.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The present invention conveys the PCB board on the conveyor chain by designing a bracket plate, and the positioning clamp and the pressing sheet on the bracket plate are used to position the plugged DIP at the plugging hole position of the PCB board. Before entering the wave soldering machine, the blocking component is started, the shading component is opened, and the DIP pin is illuminated by the set red light to facilitate the insertion of the DIP pin. At the same time, the pressing sheet is pressed downward to hold the upper position of the DIP by the action of the set moving component, and the positioning clamp is stabilized at the pin position, so that the shaking of the DIP on the PCB board is avoided. When entering the wave soldering machine for soldering, the positioning clamp reduces the dislocation of the DIP pin caused by the ion fan and positions the soldering position at the same time.

[0015] The present invention shields the red light by the shading component, thereby turning off the red light, and the red light irradiates from the DIP plug-in position, which is convenient for plugging the DIP pins and also facilitates the symmetrical distribution of the pins. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the transport chain and the bracket plate;

[0018] Figure 3 This is a schematic diagram of the positioning detection structure of the PCB board before entering the wave soldering machine of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the bracket plate of the present invention being in a positioning and detection position in front of a wave soldering machine;

[0020] Figure 5 It is a schematic diagram of the structure of a local transport chain of the present invention;

[0021] Figure 6 This is a bottom view of the structure of the bracket plate of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of the mounting plate and the blocking assembly of the present invention;

[0023] Figure 8 This is a schematic diagram of the structure when the shading component of the present invention is closed;

[0024] Figure 9 for Figure 4 A schematic diagram of the enlarged structure of the area at center A;

[0025] Figure 10 for Figure 8 A schematic diagram of the enlarged structure of the area at B in the middle;

[0026] Figure 11 This is the force analysis diagram at the hinged rod.

[0027] In the figure: 1 - wave soldering machine; 2 - conveying chain; 3 - bracket plate; 4 - pressing piece; 5 - positioning clamp; 6 - moving component; 7 - mounting plate; 8 - blocking component; 9 - light-shielding component; 21 - round hole; 22 - mounting groove; 23 - irradiation hole; 24 - box body; 31 - placing groove; 51 - track plate; 52 - rectangular frame; 53 - arc-shaped clamping piece; 54 - first hinge seat; 61 - magnetic suction seat; 62 - sliding rod; 63 - second hinge seat; 64 - hinge rod; 71 - red light lamp; 72 - support plate; 73 - driving motor; 74 - rotating screw rod; 81 - double wheel shaft; 82 - lifting screw rod; 83 - rotating shaft sleeve; 84 - belt; 85 - blocking rubber block; 86 - limiting sleeve; 87 - limiting rod; 91 - threaded shaft sleeve; 92 - connecting rod; 93 - support frame; 94 - cross frame; 95 - rotating block; 96 - fixing rod; 97 - covering frame. Detailed implementation manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-11 , the present invention provides a technical solution: a positioning device for soldering DIP chips on a PCB board, used to solve the problems of troublesome positioning when soldering DIP chips on a PCB board, and easy misalignment of DIP chip insertion caused by ion blowers and bracket plate transportation. The design includes a wave soldering machine 1 and a conveying chain 2. The wave soldering machine 1 is a prior art feature, and welding treatment is performed by using existing equipment, which will not be elaborated too much in this solution. The conveying chain 2 is designed with a driving device such as a motor installed at one end, and at the same time drives the rollers on the conveying chain 2 to roll. The conveying chain 2 passes through the wave soldering machine 1. There are multiple groups of bracket plates 3 on the conveying chain 2. The design of the bracket plate 3 refers to the Figure 6 shown in the appendix. Its overall is a rectangular frame structure. Depressions for placing the PCB board are provided at both sides. The depressions are rubber-treated. After the two ends of the PCB board are clamped on, the two ends of the PCB board are wrapped, so that the PCB board is completely clamped on the bracket plate 3. A placing groove 31 for placing the PCB board is opened on the bracket plate 3, and pressing pieces 4 for pressing the DIP chips are distributed on both sides of the bracket plate 3. The pressing piece 4 is designed as a strip-shaped plate, one end of which is larger than the DIP outer diameter and has a wrapping ring, so that when the pressing piece 4 presses on the DIP, the top of the DIP is wrapped;

[0030] A positioning clamp 5 for clamping the pins of the DIP chip is provided at the bottom of the bracket plate 3. The design of the positioning clamp 5 is as shown in the appendixFigure 6 As shown in Figure 6 , two sets of track plates 51 are installed at the bottom of the bracket plate 3. The positioning clip 5 includes a rectangular frame 52 that slides on the track plate 51. Arc-shaped clip pieces 53 are installed at both ends of the rectangular frame 52. A first hinge seat 54 is connected to the bottom of one of the arc-shaped clip pieces 53. One end of the moving component 6 is hinged to the first hinge seat 54. After the pins of the DIP are inserted into the holes of the PCB board, two pin parts of the DIP are distributed on the two arc-shaped clip pieces 53. When the DIP pins are inserted, the bent parts of the pins are bent for easy soldering. Then, during the process of dragging the rectangular frame 52, the two arc-shaped clip pieces 53 are just located at the positions of the bent parts of the DIP pins, so as to position the pins and prevent them from shaking. Two sets of moving components 6 are provided on the bracket plate 3;

[0031] The moving component 6 includes a magnetic seat 61 installed on the bracket plate 3. A sliding rod 62 is connected to the magnetic seat 61. The top of the sliding rod 62 is connected to the pressing piece 4. The bottom of the sliding rod 62 is connected to a second hinge seat 63. A hinge rod 64 is hinged to the second hinge seat 63, and one end of the hinge rod 64 is hinged to the first hinge seat 54.

[0032] An installation plate 7 is installed on the frame of the conveyor chain 2. A red light lamp 71 for irradiating the mounting holes of the PCB board is installed on the installation plate 7. When the red light lamp 71 irradiates to the bottom of the DIP chip, the moving component 6 drives the pressing piece 4 and the positioning clip 5 to position;

[0033] A blocking component 8 for blocking the movement of the bracket plate 3 is provided on the frame of the conveyor chain 2.

[0034] Two support plates 72 are installed on the installation plate 7, and the red light lamp 71 is installed on the two support plates 72. A light-shielding component 9 for covering the red light lamp 71 is installed on the installation plate 7. A driving motor 73 is installed at the bottom of the installation plate 7. The output shaft of the driving motor 73 is externally connected to the blocking component 8. A rotating screw rod 74 is installed at the top of the output shaft of the driving motor 73, and the rotating screw rod 74 is connected to the light-shielding component 9.

[0035] In order to achieve the effects of shading and turning off the red light lamp 71, the designed light-shielding component 9 includes a threaded shaft sleeve 91 sleeved on the rotating screw rod 74. Two groups of connecting rods 92 are connected to the outside of the threaded shaft sleeve 91. A support frame 93 is installed on the top of the installation plate 7. A cross frame 94 is installed on the support frame 93. A rotating block 95 is installed inside the cross frame 94. Fixed rods 96 are installed at both ends of the cross frame 94 and the rotating block 95. A covering frame 97 is connected to the fixed rods 96. The connecting rod 92 is hinged to the bottom of the fixed rod 96.

[0036] The blocking member 8 includes a double-wheel shaft 81 sleeved on the output shaft of the driving motor 73. A circular hole 21 is formed in a rectangular shape on the frame of the conveying chain 2. A lifting screw 82 is installed in the circular hole 21. A rotating shaft sleeve 83 is installed on the frame of the conveying chain 2, and a thread is provided in the rotating shaft sleeve 83. The rotating shaft sleeve 83 and the double-wheel shaft 81 are driven by a belt 84. A blocking rubber block 85 is installed at the top of the lifting screw 82. A limiting sleeve 86 is sleeved on the lifting screw 82, and a limiting rod 87 passing through the limiting sleeve 86 is installed on the frame of the conveying chain 2.

[0037] When using this device, first place the bracket plate 3 with holes one by one on the conveying chain 2. By starting the power device of the conveying chain 2, the conveying chain 2 drives the bracket plate 3 to move. When the bracket plate 3 is conveyed to the front of the entrance of the wave soldering machine 1, at this time, by controlling and starting the driving motor 73, the double-wheel shaft 81 starts to rotate. Under the action of the belt 84, the lifting screw 82 starts to move up and down along the rotating shaft sleeve 83. Because the blocking rubber block 85 is installed at the top of the lifting screw 82, after the blocking rubber block 85 passes through the circular hole 21 on the conveying chain 2, it is convenient to block the movement of the bracket plate 3 in a rectangular shape from the outside. At the same time, since a recessed part is dug out on the blocking rubber block 85, it has a good buffering effect on the bracket plate 3. When the lifting screw 82 moves upward, since a rotating screw 74 is installed on the output shaft of the driving motor 73, the threaded shaft sleeve 91 moves along the rotating screw 74. When the threaded shaft sleeve 91 touches the top of the rotating screw 74, it starts to idle due to obstruction. At the same time, a connecting rod 92 is installed on the threaded shaft sleeve 91, so that the cross frame 94 and the rotating block 95 cross and open, facilitating the opening of the two covering frames 97, thereby turning on the red light 71, so that the red light 71 irradiates from the hole position where the DIP pins are installed on the PCB board. At this time, the worker clamps the DIP, aligns the center positions of the two pins of the DIP with the irradiation position of the red light 71. After the DIP pins are inserted into the installation holes of the PCB board, at this time, the two pin parts are respectively swung and bent to both sides by tools such as tweezers. At this time, by energizing the magnetic suction seat 61, the pressing piece 4 is adsorbed above the magnetic suction seat 61. During the adsorption process of the pressing piece 4, the sliding rod 62 slides downward, so as to pull the rectangular frame 52 to slide along the track plate 51, so that the arc-shaped clip 53 blocks at the position of the bent pins, positioning and fixing the pin position. At the same time, the pressing piece 4 presses on the top of the DIP. After the pressing piece 4 and the arc-shaped clip 53 position the DIP and the pins, at this time, the driving motor 73 rotates in the reverse direction, so that the blocking rubber block 85 re-enters the circular hole 21, and the cross frame 94 and the rotating block 95 cross-move, and the covering frame 97 is combined and covered on the top of the red light 71. At this time, the bracket plate 3 loses the obstruction, and the bracket plate 3 enters the inside of the wave soldering machine 1. The soldering part of the wave soldering machine 1 welds the positioned pins and DIP from the recessed part at the bottom of the bracket plate 3, thus avoiding the problem of pin misalignment during the soldering of the wave soldering machine 1.

[0038] To reduce the influence of static electricity, mounting grooves 22 are formed in the frame of the conveying chain 2, and a plurality of irradiation holes 23 are formed in the inner wall of the mounting groove 22. A box body 24 is installed in the mounting groove 22, and the box body 24 is communicated with the ion blower on the wave soldering machine 1, so as to eliminate static electricity when positioning DIP and DIP pins, and avoid the influence of static electricity on the welding effect when entering the wave soldering machine 1.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning device for soldering DIP chips on a PCB, comprising a wave soldering machine (1) and a conveyor chain (2), wherein the conveyor chain (2) passes through the wave soldering machine (1), and is characterized in that: The conveyor chain (2) is provided with a plurality of bracket plates (3), the bracket plates (3) are provided with placement slots (31) for placing PCB boards, and pressing sheets (4) for pressing DIP chips are distributed on both sides of the bracket plates (3), and a positioning clamp (5) for clamping the pins of the DIP chips is provided at the bottom of the bracket plates (3), and two groups of moving components (6) are provided on the bracket plates (3); A mounting plate (7) is mounted on the frame of the conveyor chain (2), and a red light (71) is mounted on the mounting plate (7) for illuminating the mounting hole of the PCB board. When the red light (71) irradiates the bottom of the DIP chip, the moving component (6) drives the pressing sheet (4) and the positioning clamp (5) to position. A blocking component (8) for blocking the movement of the bracket plate (3) is provided on the frame of the conveying chain (2).

2. A positioning device for DIP chip welding on a PCB according to claim 1, characterized in that: Two groups of track plates (51) are installed at the bottom of the bracket plate (3), and the positioning clamp (5) comprises a rectangular frame (52) sliding on the track plate (51), and arc-shaped clips (53) are installed at both ends of the rectangular frame (52), and the bottom of one of the arc-shaped clips (53) is connected to a first hinge seat (54), and one end of the moving component (6) is hinged on the first hinge seat (54).

3. A positioning device for DIP chip welding on a PCB according to claim 2, characterized in that: The moving assembly (6) comprises a magnetic seat (61) mounted on the bracket plate (3), the magnetic seat (61) generates magnetic attraction when energized, a sliding rod (62) is connected to the magnetic seat (61), the top of the sliding rod (62) is connected to the pressing plate (4), and the connection position between the pressing plate (4) and the sliding rod (62) is made of metal, the bottom of the sliding rod (62) is connected to a second hinge seat (63), a hinge rod (64) is hinged to the second hinge seat (63), and one end of the hinge rod (64) is hinged to the first hinge seat (54).

4. A positioning device for DIP chip welding on a PCB according to claim 1, characterized in that: Two bracket plates (72) are mounted on the mounting plate (7), and the red light (71) is mounted on the two bracket plates (72); a shading component (9) covering the red light (71) is mounted on the mounting plate (7); a driving motor (73) is mounted at the bottom of the mounting plate (7); the output shaft of the driving motor (73) is externally connected to the blocking component (8); a rotating screw (74) is mounted at the top of the output shaft of the driving motor (73), and the rotating screw (74) is connected to the shading component (9).

5. A positioning device for DIP chip welding on a PCB according to claim 4, characterized in that: The shading component (9) comprises a threaded sleeve (91) sleeved on a rotating screw (74), the threaded sleeve (91) is externally connected to two groups of connecting rods (92), a support frame (93) is installed on the top of the mounting plate (7), a cross frame (94) is installed on the support frame (93), and a rotating block (95) is installed in the cross frame (94), both ends of the cross frame (94) and the rotating block (95) are installed with fixed rods (96), the fixed rod (96) is connected to a covering frame (97), and the connecting rod (92) is hinged to the bottom of the fixed rod (96).

6. A positioning device for DIP chip welding on a PCB according to claim 4, characterized in that: The blocking component (8) comprises a double wheel shaft (81) sleeved on the output shaft of the driving motor (73); a rectangular circular hole (21) is provided on the frame of the conveying chain (2); a lifting screw (82) is installed in the circular hole (21); a rotating shaft sleeve (83) is installed on the frame of the conveying chain (2); a thread is provided in the rotating shaft sleeve (83); the rotating shaft sleeve (83) and the double wheel shaft (81) are driven by a belt (84); and a blocking rubber block (85) is installed on the top of the lifting screw (82).

7. A positioning device for DIP chip welding on a PCB according to claim 6, characterized in that: The lifting screw rod (82) is sleeved with a limiting sleeve (86), and the frame of the conveying chain (2) is provided with a limiting rod (87) passing through the limiting sleeve (86).

8. A positioning device for DIP chip welding on a PCB according to claim 1, characterized in that: The frame of the conveyor chain (2) is provided with a mounting groove (22), and the inner wall of the mounting groove (22) is provided with a plurality of irradiation holes (23). A box (24) is installed in the mounting groove (22), and the box (24) is connected to an ion blower on the wave soldering machine (1).

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