Device for preventing tin beads from being generated in PCB welding process

Abstract

The invention relates to the technical field of welding, in particular to a device for preventing tin beads from being generated in a PCB welding process, which comprises a base, an electric plate support is arranged on the upper surface of the base, the two sides of the base are slidably connected with the same sliding frame, the surface of the sliding frame is sleeved with a movable frame, the left side of the movable frame is rotatably connected with a tin bar coil, and the tin bar coil is rotatably connected with the electric plate support. A telescopic frame is slidably connected to the lower surface of the movable frame, a welding gun is inserted into the telescopic frame, a wire feeding device is inserted into the inner wall of the telescopic frame, and through the arrangement of an air suction hole, a tin bar, a pricking needle and a wire opener, in the tin bar moving process, the sharp part of the wire opener can penetrate into the tin bar to form a continuous gap, and the wire feeding device can be used for welding the tin bar. And the two wire openers are arranged, so that the surface area of the tin bar is increased, the welding contact area of the tin bar and the welding gun is increased, the mode is efficient and energy-saving, and tin beads are reduced to the minimum extent.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a device for preventing tin beads from being generated in a PCB board welding process. Background Art

[0002] PCB board is a circuit board known as the "mother of electronic products". In the production process, soldering technology is used to solder components. During the soldering process, tin beads usually appear. The appearance of tin beads not only affects the appearance of the product, but also causes short circuits and other phenomena, seriously affecting the use of the product. However, the cleaning of tin beads not only wastes a lot of manpower and reduces the quality of the product, but also directly leads to scrapping.

[0003] In the prior art, tin beads need to be removed through secondary tin removal. Therefore, we propose a device for preventing tin beads from being generated in the PCB board welding process. Summary of the invention

[0004] The object of the present invention is to provide a device for preventing the generation of tin beads in a PCB board welding process, so as to solve the problems raised in the above-mentioned background technology.

[0005] The technical solution of the present invention is: a device for preventing tin beads from being generated in a PCB board welding process, comprising a base, an electric board support is arranged on the upper surface of the base, a same slide is slidably connected to both sides of the base, a movable frame is sleeved on the surface of the slide, a tin bar roll is rotatably connected to the left side of the movable frame, a telescopic frame is slidably connected to the lower surface of the movable frame, a welding gun is inserted into the interior of the telescopic frame, a switch device is fixedly installed on the lower surface of the telescopic frame, a trapezoidal block is arranged in the inner cavity of the switch device, a slide rod is fixedly installed on the upper surface of the trapezoidal block, and the upper end of the slide rod is fixedly connected to a support The slide bar penetrates the interior of the switch device and extends upward, a first spring is sleeved on the surface of the slide bar, one end of the first spring is fixedly connected to the upper surface of the trapezoidal block, and the other end of the first spring is fixedly connected to the inner top surface of the switch device, a sensing rod is fixedly connected to the lower surface of the trapezoidal block, and the sensing rod penetrates the interior of the switch device and extends downward, a telescopic block is arranged on the left side wall of the trapezoidal block, the telescopic block penetrates the inner wall of the switch device and extends to the left, and two symmetrically arranged second springs are fixedly connected to the right side of the telescopic block, and the second springs are respectively located on both sides of the trapezoidal block;

[0006] A wire feeding device is inserted into the inner wall of the telescopic frame, and an air suction hole is penetrated through the upper surface of the wire feeding device, a tin bar is inserted into the interior of the wire feeding device, and a cover body is sleeved on the upper end of the wire feeding device, and one end of the tin bar away from the wire feeding device penetrates through the interior of the cover body and is wound around the surface of the tin bar roll; a strip groove is provided on the inner wall of the air suction hole, and one end of the strip groove away from the air suction hole is tangent to the groove of the tin bar; a rotating rod is rotatably connected to the interior of the strip groove, a needle is provided at the right end of the rotating rod, and a fan blade is provided at the left end of the rotating rod; a groove is provided at the upper end of the wire feeding device, and a wire opener is provided inside the groove; an air suction pipe is provided at the upper end of the wire feeding device, one end of the air suction pipe penetrates through the interior of the cover body and is connected to the air suction hole, and the other end of the air suction pipe is fixedly connected to the air suction device.

[0007] Preferably, the trapezoidal block is configured to be smaller at the top and larger at the bottom, and the thickness of the trapezoidal block is smaller than the width of the telescopic block.

[0008] Preferably, the wire opener is a combination of a cone and a boss, the conical portion of the wire opener extends toward the axis of the tin bar, and the number of the wire openers is two.

[0009] Preferably, the air suction hole is arranged in a semicircular shape, and the lower end of the air suction hole is flush with the electric board support.

[0010] Preferably, the diameter of the air suction hole is smaller than the length of the sliding rod, and the size of the air suction hole is matched with the size of the left end portion of the telescopic block.

[0011] Preferably, the needle is arranged in a continuous cone shape, and the sharp end of the needle abuts against the surface of the tin bar.

[0012] Preferably, the fan blades rotate counterclockwise and are located in the middle of the air suction holes.

[0013] Preferably, one side of the tin bar near the bottom of the air suction hole is recessed inward to form an empty groove, and the side surface of the tin bar is located inside the empty groove.

[0014] The present invention provides a device for preventing the generation of tin beads in a PCB board welding process through improvement. Compared with the prior art, the present invention has the following improvements and advantages:

[0015] First, the present invention provides a device for preventing tin beads from being generated in a PCB board welding process. By setting a trapezoidal block, a first spring, a sensing rod, a telescopic block, and an air suction hole, when the sensing rod contacts the PCB board, the first spring is deformed, and at the same time the trapezoidal block moves upward. Since the trapezoidal block is set in a trapezoidal shape, the telescopic block moves to the left, and then the left end part of the telescopic block is separated from the air suction hole, so that the air suction hole starts normal air suction work. This method is simple to operate, timely and effective, so that the tin beads can be sucked away in time during the welding work, and it can also avoid sucking away components directly before absorbing the tin beads.

[0016] Second: The present invention provides a device for preventing the generation of tin beads in the PCB board welding process. By setting an air suction hole, a tin bar, a needle, and a fan blade, during the welding work, the wind will drive the fan blade to rotate. Since the needle and the fan blade are coaxial, the needle will rotate. Since the needle and the surface of the tin bar are against each other, the tin bar moves downward, so that the tin bar can be delivered in time during the welding process, the supply of the tin bar during welding is guaranteed, and the phenomenon of cold solder joints during the welding process is avoided, so that welding materials can be provided in time during the PCB welding process. Third: The present invention provides a device for preventing the generation of tin beads in the PCB board welding process. By setting an air suction hole, a tin bar, a needle, and a wire opener, during the movement of the tin bar, the sharp part of the wire opener will penetrate into the interior of the tin bar to form a continuous crack, and the two wire openers are set to increase the surface area of ​​the tin bar, thereby increasing the welding contact area with the welding gun, preventing the tin bar from splashing during welding. This method is efficient, energy-saving, and minimizes the generation of tin beads. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention;

[0019] Figure 2 is a schematic diagram of the structure of the switch device of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the strip groove and the rotating rod of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the wire opener of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the bottom of the wire feeding device of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the telescopic block of the present invention.

[0024] Description of reference numerals:

[0025] 1. Base; 2. Electric board support; 3. Slide; 4. Movable frame; 5. Tin bar roll; 6. Telescopic frame; 7. Welding gun; 8. Switch device; 81. Trapezoidal block; 82. Slide rod; 83. Support block; 84. First spring; 85. Sensing rod; 86. Telescopic block; 87. Second spring; 9. Wire feeding device; 91. Air suction hole; 92. Tin bar; 93. Strip groove; 94. Rotating rod; 95. Needle; 96. Fan blade; 10. Groove; 11. Wire opener; 12. Suction pipe; 13. Suction device. DETAILED DESCRIPTION

[0026] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The present invention provides a device for preventing the generation of tin beads in a PCB board welding process through improvement. The technical solution of the present invention is:

[0028] like Figure 1 - Figure 6 As shown, a device for preventing tin beads from being generated in a PCB board welding process comprises a base 1, an electric board support 2 is arranged on the upper surface of the base 1, a same slide 3 is slidably connected to both sides of the base 1, a movable frame 4 is sleeved on the surface of the slide 3, a tin bar roll 5 is rotatably connected to the left side of the movable frame 4, a telescopic frame 6 is slidably connected to the lower surface of the movable frame 4, a welding gun 7 is inserted into the interior of the telescopic frame 6, a switch device 8 is fixedly installed on the lower surface of the telescopic frame 6, a trapezoidal block 81 is arranged in the inner cavity of the switch device 8, a slide rod 82 is fixedly installed on the upper surface of the trapezoidal block 81, a support block 83 is fixedly connected to the upper end of the slide rod 82, and the slide rod 82 penetrates The interior of the switch device 8 and extends upward, the surface of the slide bar 82 is sleeved with a first spring 84, one end of the first spring 84 is fixedly connected to the upper surface of the trapezoidal block 81, and the other end of the first spring 84 is fixedly connected to the inner top surface of the switch device 8, and the lower surface of the trapezoidal block 81 is fixedly connected with a sensing rod 85, which penetrates the interior of the switch device 8 and extends downward, and the left side wall of the trapezoidal block 81 is provided with a telescopic block 86, which penetrates the inner wall of the switch device 8 and extends to the left, and the right side of the telescopic block 86 is fixedly connected with two symmetrically arranged second springs 87, and the second springs 87 are respectively located on both sides of the trapezoidal block 8.

[0029] A wire feeding device 9 is inserted into the inner wall of the telescopic frame 6, and an air suction hole 91 is penetrated through the upper surface of the wire feeding device 9, a tin bar 92 is inserted inside the wire feeding device 9, and a cover body is sleeved on the upper end of the wire feeding device 9. One end of the tin bar 92 away from the wire feeding device 9 passes through the inside of the cover body and is wound on the surface of the tin bar roll 5, a strip groove 93 is opened on the inner wall of the air suction hole 91, and one end of the strip groove 93 away from the air suction hole 91 is tangent to the groove of the tin bar 92, and a rotating rod 94 is rotatably connected to the inside of the strip groove 93, a needle 95 is provided at the right end of the rotating rod 94, and a fan blade 96 is provided at the left end of the rotating rod 94, a groove 10 is opened at the upper end of the wire feeding device 9, and a wire opener 11 is provided inside the groove 10, and an air suction pipe 12 is provided at the upper end of the wire feeding device 9, one end of the air suction pipe 12 passes through the inside of the cover body and is connected to the air suction hole 91, and the other end of the air suction pipe 12 is fixedly connected to the air suction device 13.

[0030] Furthermore, the trapezoidal block 81 is configured to be small at the top and large at the bottom, and the thickness of the trapezoidal block 81 is smaller than the width of the telescopic block 86. By configuring the trapezoidal block 81, the telescopic block 86 moves due to the different widths of the trapezoidal block 81, and the telescopic block 86 is larger than the width of the trapezoidal block 81, so as to facilitate the stretching and resetting of the second springs 87 on both sides.

[0031] Furthermore, the wire opener 11 is a combination of a cone and a boss, the conical portion of the wire opener 11 extends toward the axis of the tin bar 92, and there are two wire openers 11. By providing the wire opener 11, a continuous wire groove can be drawn on the surface of the tin bar 92, and the two wire openers 11 also increase the number of wire grooves, making the contact with the welding gun more complete, preventing the tin bar from splashing during welding, and greatly reducing the generation of tin beads.

[0032] Furthermore, the air suction hole 91 is semicircular in shape, and the lower end of the air suction hole 91 is level with the board support 2. By setting the air suction hole 91 semicircularly, the fan blades 96 can rotate more smoothly, and the air suction hole 91 is flush with the support 2, which can fully avoid the phenomenon of tin beads splashing. Therefore, the air suction hole 91 can also serve as a protective cover.

[0033] Furthermore, the diameter of the air suction hole 91 is smaller than the length of the slide bar 82, and the size of the air suction hole 91 is matched with the size of the left end portion of the telescopic block 86. By setting the slide bar 82, various PCB boards of different thicknesses can be adapted, and the slide bar 82 is long enough to keep the air suction hole 91 of the telescopic block 86 separated and combined.

[0034] Furthermore, the needle 95 is arranged in a continuous cone shape, and the sharp end of the needle 95 abuts against the surface of the tin bar 92. By arranging the needle 95 and the tin bar 92 to cooperate with each other, the tin bar 92 can be delivered in time during the welding process of the welding gun 7.

[0035] Furthermore, the fan blade 96 rotates counterclockwise and is located in the middle of the air suction hole. By setting the fan blade 96 to rotate counterclockwise, the tin bar 92 can be moved downward, and the middle position of the fan blade 96 can maximize the rotation speed, providing stable power for the smooth movement of the tin bar 92.

[0036] Furthermore, one side of the tin bar 92 near the bottom of the suction hole 91 is recessed inward to form an empty groove, and the side of the tin bar 92 is located inside the empty groove. Through the above arrangement, the tin beads are sucked away through the suction hole 91 to the greatest extent.

[0037] Working principle: When in use, first place the PCB on the board support 2, then turn on the suction device 13, and then turn on the soldering machine. When the lower end of the sensing rod 85 contacts the PCB, the first spring 14 is squeezed, and the trapezoidal block 81 moves upward. The difference between the upper and lower widths of the trapezoidal block 81 changes, causing the telescopic block 86 to move to the left. As the telescopic block 86 moves to the left, the leftmost end of the telescopic block 86 is separated from the suction hole 91, thereby restoring the normal suction work of the suction hole 91. The fan blade 96 rotates under the influence of wind force, and at the same time, the needle 95 rotates. The tin bar 92 is driven to move downward. During the downward movement of the tin bar 92, the two wire openers 11 will scratch the surface of the tin bar 92. When the tin bar 92 at the lower end is melted into liquid by the high temperature of the welding gun 7, the PCB board and the components are adhered together, and the excess molten liquid enters the suction pipe 13 along the inner wall of the suction hole 13. When the switch device 7 is separated from the PCB board, the sensing rod 85 is gradually reset under the influence of the first spring 84, and the telescopic block 86 at the far left will block the suction hole 91. The wind force at the lower end of the telescopic block 86 gradually disappears, and the tin bar 92 will stop being transported downward, and the welding work is completed.

[0038] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for preventing the generation of solder beads in a PCB soldering process, comprising a base (1), characterized in that: The upper surface of the base (1) is provided with an electric board support (2), and the two sides of the base (1) are slidably connected with the same slide frame (3), the surface of the slide frame (3) is sleeved with a movable frame (4), the left side of the movable frame (4) is rotatably connected with a tin bar roll (5), the lower surface of the movable frame (4) is slidably connected with a telescopic frame (6), a welding gun (7) is inserted inside the telescopic frame (6), a switch device (8) is fixedly installed on the lower surface of the telescopic frame (6), the inner cavity of the switch device (8) is provided with a trapezoidal block (81), a slide rod (82) is fixedly installed on the upper surface of the trapezoidal block (81), the upper end of the slide rod (82) is fixedly connected with a support block (83), and the slide rod (82) passes through the interior of the switch device (8) and The sliding rod (82) extends upward, a first spring (84) is sleeved on the surface of the sliding rod (82), one end of the first spring (84) is fixedly connected to the upper surface of the trapezoidal block (81), and the other end of the first spring (84) is fixedly connected to the inner top surface of the switch device (8), and a sensing rod (85) is fixedly connected to the lower surface of the trapezoidal block (81), and the sensing rod (85) passes through the interior of the switch device (8) and extends downward, and a telescopic block (86) is provided on the left side wall of the trapezoidal block (81), and the telescopic block (86) passes through the inner wall of the switch device (8) and extends to the left, and two symmetrically arranged second springs (87) are fixedly connected to the right side of the telescopic block (86), and the second springs (87) are respectively located on both sides of the trapezoidal block (81); A wire feeding device (9) is inserted into the inner wall of the telescopic frame (6), and an air suction hole (91) is opened through the upper surface of the wire feeding device (9), and a tin bar (92) is inserted into the interior of the wire feeding device (9). A cover body is sleeved on the upper end of the wire feeding device (9), and the end of the tin bar (92) away from the wire feeding device (9) passes through the interior of the cover body and is wound on the surface of the tin bar roll (5). A strip groove (93) is opened on the inner wall of the air suction hole (91), and the end of the strip groove (93) away from the air suction hole (91) is tangent to the groove of the tin bar (92), and the strip groove (93) is tangent to the groove of the tin bar (92). A rotating rod (94) is rotatably connected inside the shaped groove (93), a needle (95) is arranged at the right end of the rotating rod (94), a fan blade (96) is arranged at the left end of the rotating rod (94), a groove (10) is opened at the upper end of the wire feeding device (9), a wire opener (11) is arranged inside the groove (10), an air suction pipe (12) is arranged at the upper end of the wire feeding device (9), one end of the air suction pipe (12) passes through the interior of the cover body and is connected to the air suction hole (91), and the other end of the air suction pipe (12) is fixedly connected to the air suction device (13).

2. The device for preventing the generation of tin beads in a PCB board welding process according to claim 1, characterized in that: The trapezoidal block (81) is arranged in a shape of being smaller at the top and larger at the bottom, and the thickness of the trapezoidal block (81) is smaller than the width of the telescopic block (86).

3. The device for preventing the generation of tin beads in a PCB board welding process according to claim 1, characterized in that: The wire opener (11) is a combination of a cone and a boss, the cone portion of the wire opener (11) extends toward the axis of the tin bar (92), and there are two wire openers (11).

4. The device for preventing the generation of tin beads in a PCB board welding process according to claim 1, characterized in that: The air suction hole (91) is arranged in a semicircular shape, and the lower end of the air suction hole (91) is flush with the electric board support (2).

5. The device for preventing the generation of tin beads in a PCB board welding process according to claim 1, characterized in that: The diameter of the air suction hole (91) is smaller than the length of the sliding rod (82), and the size of the air suction hole (91) is matched with the size of the left end portion of the telescopic block (86).

6. The device for preventing the generation of tin beads in a PCB board welding process according to claim 1, characterized in that: The pricking needle (95) is arranged in a continuous pointed cone shape, and the sharp end of the pricking needle (95) abuts against the surface of the tin bar (92).

7. The device for preventing the generation of tin beads in a PCB board welding process according to claim 1, characterized in that: The fan blade (96) rotates in a counterclockwise direction, and the fan blade (96) is located in the middle of the air suction hole (91).

8. The device for preventing the generation of tin beads in a PCB board welding process according to claim 1, characterized in that: One side of the tin bar (92) near the bottom of the air suction hole (91) is recessed inward to form an empty groove, and the side surface of the tin bar (92) is located inside the empty groove.

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