Circuit board shielding case welding equipment

Abstract

The invention discloses circuit board shielding case welding equipment, and belongs to the technical field of circuit board welding equipment, the circuit board shielding case welding equipment comprises an end plate, the center of the end plate is provided with a welding assembly, and four groups of rapid positioning assemblies are installed around the welding assembly; the surface of the outer limiting plate is provided with a through groove for the sliding block to pass through, and the sliding block is in sliding fit with the protruding block. The pressing assembly is hinged to the protruding block through two sets of parallel connecting rods, and the sliding block is hinged to the pressing assembly through a push rod at the same time. When the inner sliding plate makes contact with the circuit board under the action of the welding mechanical arm, the inner sliding plate drives the sliding block to move upwards relative to the outer limiting plate, the sliding block pushes the pressing assembly through the push rod, and the pressing assembly moves inwards in the radial direction to press the shielding cover in the center. According to the device, the shielding case can be conveniently and rapidly positioned before being welded, and the production efficiency of a circuit board can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding equipment, and particularly relates to a welding equipment for a circuit board shielding cover. Background Art

[0002] With the development of electronic devices towards high frequency and high integration, the electromagnetic interference (EMI) problem on the printed circuit board (PCB) has become increasingly prominent. As a key component for suppressing electromagnetic radiation, the shielding cover is widely used in fields such as communication, consumer electronics, and automotive electronics. Currently, the shielding cover is mainly welded to the circuit board through the surface mount technology to ensure good grounding and electromagnetic sealing. However, during the welding process of the shielding cover, since each shielding cover needs to be positioned individually before welding, the positioning is inconvenient, resulting in low welding efficiency and there are also unsafe technical problems. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a welding equipment for a circuit board shielding cover, which can facilitate the rapid positioning of the shielding cover before welding and improve the production efficiency of the circuit board.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A welding equipment for a circuit board shielding cover of the present invention, with the shielding cover placed on the upper surface of the circuit board. The equipment includes an end plate, a welding component is arranged at the center of the end plate, and four groups of quick positioning components are installed around the welding component; each group of quick positioning components includes an inner slide plate, an outer limiting plate, a slider, a convex block, a push rod, a connecting rod, and a pressing component. The outer limiting plate is connected to the end plate, the convex block is fixed on the surface of the outer limiting plate, a slot for the inner slide plate to slide is formed at the lower end of the outer limiting plate, the slider is fixedly connected to the inner slide plate, a through groove for the slider to pass through is also formed on the surface of the outer limiting plate, and the slider is also in sliding cooperation with the convex block; the pressing component is hinged to the convex block through two parallel connecting rods, and the slider is also hinged to the pressing component through a push rod; when the inner slide plate contacts the circuit board, the inner slide plate drives the slider to move upward relative to the outer limiting plate, and the slider pushes the pressing component through the push rod, so that the pressing component moves radially inward to press the shielding cover on the upper side of the circuit board.

[0005] Further, the push rod includes an inner rod, an outer rod, and an elastic recovery device. One end of the outer rod is hinged to the pressing component, one end of the inner rod is slidably fitted at the other end of the outer rod, the other end of the inner rod is hinged to the slider, the elastic recovery device is sleeved outside the inner rod, and both ends of the elastic recovery device are respectively abutted against the end faces of the inner rod and the outer rod. A pin shaft is fixedly provided at the end of the inner rod located inside the outer rod, and a chute for limiting the pin shaft is axially formed on the outer rod.

[0006] Further, the pressing assembly includes a connecting plate, a vertical pressing plate, and an arc-shaped guiding plate. Both ends of the connecting plate are hinged to two groups of connecting rods, the middle of the connecting plate is hinged to the outer rod of the push rod, the vertical pressing plate is fixed on the side of the connecting plate facing the shielding cover, the arc-shaped guiding plate is fixed at the lower end of the vertical pressing plate, and the arc-shaped guiding plate bends towards the side away from the shielding cover.

[0007] Further, a vertical rod is fixedly connected to the upper end of the outer limiting plate. A first limiting hole and a second limiting hole are formed in the end plate. The vertical rod passes through the first limiting hole and is connected with a limiting rod through a connecting plate. A clamping groove is formed at the lower end of the limiting rod. After the limiting rod passes through the second limiting hole, it is used to limit the shielding cover; a spring is sleeved outside the vertical rod. The upper end of the spring is connected to the connecting plate through a pressure sensor, and the lower end of the spring is connected to the outer limiting plate. Before clamping the shielding cover, the pressing assembly is in an open state. After the shielding cover is inserted, the vertical rod can be driven to move upward by the limiting rod, and the quick positioning assembly moves upward together with the vertical rod. When the pressure of the pressure sensor reaches the set value, the movement stops.

[0008] Further, the welding assembly includes a welding head, an eccentric rod, a central column, a first gear, a second gear, and a first motor. The central column is rotatably arranged at the center of the end plate. The upper end of the central column is coaxially connected with a first gear. The second gear meshes with the second gear, and the second gear is driven to rotate by the first motor. The first motor is fixed on the end plate. One end of the eccentric rod is connected to the central column, and the other end of the eccentric rod is connected with a welding head.

[0009] Further, a guide rail groove is formed along the length direction of the eccentric rod. A guide rail is slidably arranged in the guide rail groove. One end of the guide rail is fixedly connected to the welding head. A rack is fixed on the upper side of the guide rail. The rack meshes with a third gear, and the third gear is driven to rotate by a second motor. The second motor is fixed on the eccentric rod.

[0010] Further, two rotating rods are rotatably arranged on the end plate. The two rotating rods are centrosymmetric with respect to the welding assembly. The lower ends of the rotating rods are simultaneously hinged with a first baffle and a second baffle. The first baffle and the second baffle are connected by an elastic connecting device and are connected into a right angle through the elastic connecting device. The rotating rod is connected to the output end of a third motor.

[0011] Further, an opening groove is formed on the end plate. The opening groove extends along the radial direction of the welding assembly. The rotating rod is slidably arranged in the opening groove. The third motor is connected with a telescopic device.

[0012] The beneficial effects of the present invention are as follows: The welding equipment for the circuit board shielding cover of the present invention uses an existing structure for the welding robotic arm, which can drive the end plate to move in multiple degrees of freedom. By setting four groups of quick positioning components, the four sides of the square shielding cover can be pressed and positioned to prevent the shielding cover from shaking during welding, thus affecting the positional accuracy. Thereby, the welding efficiency is improved.

[0013] Specifically, at the beginning, the shielding cover is positioned at the center of the end plate. When the inner sliding plate contacts the circuit board under the action of the welding robotic arm, the inner sliding plate can drive the slider to move upward relative to the outer limiting plate. The slider pushes the pressing component through the push rod, causing the pressing component to displace radially inward to press the shielding cover at the center, realizing the quick positioning of the shielding cover. The stability of the positioning can be better ensured through the positioning in four directions.

[0014] The device of the present invention uses a pure mechanical mechanism for positioning, which can solve the limitation of the high temperature generated during traditional welding on the use of cables. The device of the present invention, by positioning while welding, can not only improve the welding efficiency, but also compactify the structure and avoid the interference problem between the positioning device and the shielding cover caused by the conventional positioning method.

[0015] The device of the present invention, by using four groups of quick positioning components, and the four outer limiting plates of the four groups of quick positioning components can be combined into a closed quadrilateral, which can block the heat during welding and prevent the heat from affecting the adjacent solder structures. At the same time, the formed quadrilateral baffle structure can also block the welding spatter slag.

[0016] Other advantages, objectives and features of the present invention will be described in the subsequent specification, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be achieved through the following specification. Brief Description of the Drawings

[0017] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 Structural schematic of the device of the present invention Figure 1 ; Figure 2 Structural schematic of the device of the present invention Figure 2 ; Figure 3 Structural schematic diagram of the quick positioning component; Figure 4 is Figure 3 Enlarged view at A; Figure 5 Structural schematic diagram of the welding component; Figure 6 is Figure 5Enlarged view at B; Figure 7 Schematic structural diagram of the attitude adjustment device; Figure 8 Schematic diagram of the contact between the shielding cover and the circuit board.

[0018] The labels in the attached drawings are as follows: end plate 1, welding assembly 2, quick positioning assembly 3, inner sliding plate 4, outer limiting plate 5, slider 6, bump 7, push rod 8, connecting rod 9, pressing assembly 10, slot 11, inner rod 12, outer rod 13, elastic recovery device 14, pin shaft 15, chute 16, connecting plate 17, vertical pressing plate 18, arc-shaped guiding plate 19, vertical rod 20, first limiting hole 21, second limiting hole 22, connecting plate 23, limiting rod 24, clamping groove 25, pressure sensor 26, welding head 27, eccentric rod 28, central column 29, first gear 30, second gear 31, first motor 32, guide rail groove 33, rack 34, second motor 35, rotating rod 36, first baffle 37, second baffle 38, elastic connection device 39, third motor 40, opening groove 41, telescopic device 42, shielding cover 43, circuit board 44. Detailed implementation manners

[0019] Example 1, as Figures 1 - 7 shown, a welding device for a circuit board shielding cover of the present invention includes an end plate 1. The end plate 1 is connected with a welding robotic arm. The welding robotic arm adopts an existing ordinary robotic arm structure, and through the action of this welding robotic arm, the end plate 1 can be driven to move with multiple degrees of freedom. A welding assembly 2 is arranged at the center of the end plate 1, and four groups of quick positioning assemblies 3 are installed around the welding assembly 2. The four groups of quick positioning assemblies 3 are evenly distributed around the welding assembly 2 in a quadrilateral manner; the shielding cover 43 of the present invention is vertically installed on the upper surface of the circuit board 44, and the upper side of the shielding cover 43 is open, which is convenient for the welding assembly to perform welding. Subsequently, the opening of the shielding cover 43 can be closed according to needs, which can be understood by those skilled in the art.

[0020] Among them, each group of quick positioning assemblies 3 includes an inner sliding plate 4, an outer limiting plate 5, a slider 6, a bump 7, a push rod 8, a connecting rod 9, and a pressing assembly 10. Both the inner sliding plate 4 and the outer limiting plate 5 are rectangular, and both are perpendicular to the end plate 1.

[0021] Among them, the outer limiting plate 5 is connected to the end plate 1, and the convex block 7 is fixed on the surface of the outer limiting plate 5. The convex block 7 is arranged vertically, and its length direction is perpendicular to the end plate 1. A rectangular groove for sliding cooperation with the slider 6 is provided on the convex block 7. The lower end of the outer limiting plate 5 forms a slot 11 for the inner sliding plate 4 to slide. The inner sliding plate 4 is slidably arranged in the slot 11 and can slide vertically. The slider 6 is fixedly connected to the inner sliding plate 4. A through groove for the slider 6 to pass through is also provided on the surface of the outer limiting plate 5, that is, a part of the support plate of the slider 6 extends into the through groove and is fixedly connected to the inner sliding plate 4. The slider 6 is also slidably engaged with the convex block 7 and can slide along the length direction of the convex block 7.

[0022] The pressing assembly 10 is hinged to the convex block 7 through two groups of parallel connecting rods 9. The other end of the connecting rod 9 is hinged to the convex block 7. The two groups of connecting rods 9, the convex block 7 and the pressing assembly 10 form a parallelogram. The slider 6 is also hinged to the pressing assembly 10 through a push rod 8. When the inner sliding plate 4 contacts the circuit board 44 under the action of the welding robot arm, the inner sliding plate 4 drives the slider 6 to move upward relative to the outer limiting plate 5. The slider 6 pushes the pressing assembly 10 through the push rod 8, so that the pressing assembly 10 moves radially inward to press the shielding cover 43 in the center.

[0023] In this embodiment, the push rod 8 includes an inner rod 12, an outer rod 13 and an elastic recovery device 14. The diameter of one end of the inner rod 12 is smaller than that of the outer rod 13, so it can be slidably inserted into the outer rod 13. One end of the outer rod 13 is hinged to the pressing assembly 10. One end of the inner rod 12 is slidably engaged with the other end of the outer rod 13. The other end of the inner rod 12 is hinged to the slider 6. The elastic recovery device 14 uses a spring. The spring is sleeved on the outside of the inner rod 12. The two ends of the elastic recovery device 14 are respectively abutted against the end faces of the inner rod 12 and the outer rod 13. A pin shaft 15 is fixedly provided at the end of the inner rod 12 located inside the outer rod 13. A chute 16 for limiting the pin shaft 15 is axially provided on the outer rod 13. The pin shaft 15 is engaged with the chute 16 to limit the inner rod 12 and prevent relative rotation between the inner rod 12 and the outer rod 13, and also prevent the inner rod 12 from slipping out of the inside of the outer rod 13. At the same time, by setting the elastic connection of the spring, the thrust of the push rod 8 becomes flexible, which can avoid damage to the shielding cover 43.

[0024] In this embodiment, the pressing assembly 10 includes a connecting plate 17, a vertical pressing plate 18 and an arc-shaped guiding plate 19. The two ends of the connecting plate 17 are hinged to the two groups of connecting rods 9. The connecting plate 17, the connecting rods 9 and the convex block 7 together form a quadrilateral structure. The middle part of the connecting plate 17 is hinged to the outer rod 13 of the push rod 8. The vertical pressing plate 18 is fixed on the side of the connecting plate 17 facing the shielding cover 43. The arc-shaped guiding plate 19 is fixed at the lower end of the vertical pressing plate 18. The arc-shaped guiding plate 19 bends towards the side away from the shielding cover 43 and can be used to guide the shielding cover 43 when it extends in.

[0025] Embodiment 2, as Figure 3 shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, a vertical rod 20 is fixedly connected to the upper end of the outer limiting plate 5. A first limiting hole 21 and a second limiting hole 22 are formed in the end plate 1. After the vertical rod 20 passes through the first limiting hole 21, a limiting rod 24 is connected through a connecting plate 23. A clamping groove 25 is formed at the lower end of the limiting rod 24. The limiting rod 24 can be made of rubber material for better clamping. After the limiting rod 24 passes through the second limiting hole 22, it is used to limit the shielding cover 43. A spring is sleeved outside the vertical rod 20. The upper end of the spring is connected to the connecting plate 23 through a pressure sensor 26, and the lower end of the spring is connected to the outer limiting plate 5. Before clamping the shielding cover 43, the pressing assembly 10 is in an open state. After the shielding cover 43 is inserted, the vertical rod 20 can be driven to move upward by the limiting rod 24, and the quick positioning assembly 3 moves upward together with the vertical rod 20. When the pressure of the pressure sensor 26 reaches the set value, the movement stops.

[0026] The following briefly describes a working process of this embodiment: The shielding cover 43 is first installed on the protruding working position. First, the end plate 1 is displaced by the welding robot arm, so that the welding assembly 2 and the quick positioning assembly 3 on the end plate 1 approach the shielding cover 43 to be installed. The shielding cover 43 moves relative to the normal direction of the end plate 1 and approaches the end plate 1. Since the pressing assembly 10 is in an open state before clamping the shielding cover 43, the shielding cover 43 first contacts the clamping groove 25 and then is stuck in the clamping groove 25. The clamping groove 25 can be a rubber groove to ensure that it will not fall off. At this time, the lower end face of the shielding cover 43 and the lower end of the outer limiting plate 5 are almost in the same horizontal plane. After the shielding cover 43 is inserted, the vertical rod 20 can be driven to move upward by the limiting rod 24, and the quick positioning assembly 3 moves upward together with the vertical rod 20. When the pressure of the pressure sensor 26 reaches the set value, the movement stops.

[0027] Subsequently, operate the welding robot arm or manually move the end plate 1 again to move the shielding cover 43 clamped by the clamping groove 25 to the upper side of the circuit board 44 until the lower end of the inner sliding plate 4 contacts the circuit board 44. Then continuously control the shielding cover 43 to displace downward in the vertical direction. The circuit board 44 compresses the inner sliding plate 4, and the inner sliding plate 4 drives the slider 6 to move upward relative to the outer limiting plate 5. The slider 6 pushes the pressing assembly 10 through the push rod 8, so that the pressing assembly 10 displaces radially inward to press the central shielding cover 43.

[0028] In this embodiment, the welding assembly 2 includes a welding head 27, an eccentric rod 28, a central column 29, a first gear 30, a second gear 31, and a first motor 32. The central column 29 is rotatably arranged at the center of the end plate 1. The upper end of the central column 29 passes through the end plate 1, and the upper end of the central column 29 is coaxially connected with the first gear 30. The second gear 31 meshes with the second gear 31, and the second gear 31 is driven to rotate by the first motor 32. The first motor 32 is fixed on the end plate 1. One end of the eccentric rod 28 is connected to the central column 29, and the other end of the eccentric rod 28 is connected with the welding head 27. By providing the eccentric rod 28, the welding head 27 can be driven to rotate for welding at various circumferential positions. In order to adapt to the radial distance, the present invention also improves the eccentric rod 28. Specifically, a guide rail groove 33 is formed along the length direction of the eccentric rod 28, and a guide rail is slidably arranged in the guide rail groove 33. One end of the guide rail is fixedly connected to the welding head 27, and a rack 34 is fixed on the upper side of the guide rail. The rack 34 meshes with a third gear, and the third gear is driven to rotate by a second motor 35. The second motor 35 is fixed on the eccentric rod 28. Through the third gear, the guide rail and the welding head 27 connected thereto can be driven to move along the length direction of the eccentric rod 28 to achieve a movement operation of the radial distance. By cooperating with the rotating central column 29, it is convenient to weld welds in various situations.

[0029] Embodiment 3, as Figure 7 shown, the difference between this embodiment and Embodiment 2 is that in this embodiment, an attitude adjustment device for the shielding cover 43 is further provided. By adjusting the attitude of the shielding cover 43, the square shielding cover 43 can be easily clamped by the clamping groove 25. Specifically, two rotating rods 36 are rotatably arranged on the end plate 1. The two rotating rods 36 are centrosymmetric with respect to the welding assembly 2, that is, the structures of the two attitude adjustment devices are completely the same. The lower ends of the rotating rods 36 are simultaneously hinged with a first baffle 37 and a second baffle 38. The first baffle 37 and the second baffle 38 are connected by an elastic connection device 39 and are connected into a right angle by the elastic connection device 39. The elastic connection device 39 can adopt a return torsion spring or a right-angled elastic steel sheet. The purpose is to keep the first baffle 37 and the second baffle 38 relatively in a right-angle state, but the specific device is flexible. The rotating rod 36 is connected to the output end of the third motor 40. The third motor 40 drives the rotating rod 36 through a reducer, and the reciprocating rotation makes the rotating rod 36 drive the first baffle 37 and the second baffle 38 to swing at a small angle simultaneously, so that the square shielding cover 43 with inconsistent insertion directions can rotate slightly around the axis of the central column 29 until the shielding cover 43 can be clamped into the right angle formed by the first baffle 37 and the second baffle 38. At this time, the attitude adjustment is completed, and it can be perfectly matched with the clamping groove 25.

[0030] In this embodiment, an opening groove 41 is formed in the end plate 1. The opening groove 41 extends along the radial direction of the welding assembly 2. The rotating rod 36 is slidably arranged in the opening groove 41, and the third motor 40 is connected with a telescopic device 42. By arranging the telescopic device 42, the rotating rod 36 can be driven to move a certain distance along the radial direction, so that during the working process of the attitude adjustment device, the position of the shielding cover 43 can also be better determined until the shielding cover 43 continuously moves to the center.

[0031] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A circuit board shielding cover welding device, the shielding cover is placed on the upper surface of the circuit board, characterized in that: The equipment includes an end plate, a welding assembly is arranged at the center of the end plate, and four groups of quick positioning assemblies are installed around the welding assembly; each group of quick positioning assemblies includes an inner slide plate, an outer limit plate, a slider, a protrusion, a push rod, a connecting rod, and a clamping assembly, the outer limit plate is connected to the end plate, the protrusion is fixed on the surface of the outer limit plate, the lower end of the outer limit plate forms a slot for the sliding of the inner slide plate, the slider is fixedly connected to the inner slide plate, and the surface of the outer limit plate is simultaneously provided with a through groove for the slider to pass through, and the slider is simultaneously slidably matched with the protrusion; the clamping assembly is hinged to the protrusion through two groups of parallel connecting rods, and the slider is simultaneously hinged to the clamping assembly through the push rod; when the inner slide plate contacts the circuit board, the inner slide plate drives the slider to move upward relative to the outer limit plate, and the slider pushes the clamping assembly through the push rod, so that the clamping assembly moves radially inward to clamp the shielding cover on the upper side of the circuit board.

2. A circuit board shielding cover welding device according to claim 1, characterized in that: The push rod includes an inner rod, an outer rod and an elastic recovery device, one end of the outer rod is hinged to the clamping assembly, one end of the inner rod is slidably fitted in the other end of the outer rod, the other end of the inner rod is hinged to the slider, the elastic recovery device is sleeved on the outside of the inner rod, the two ends of the elastic recovery device are respectively abutted against the end surfaces of the inner rod and the outer rod, a pin is fixedly provided at one end of the inner rod located on the inner side of the outer rod, and a sliding groove for limiting the pin is axially opened on the outer rod.

3. A circuit board shielding cover welding device according to claim 2, characterized in that: The clamping assembly includes a connecting plate, a vertical pressure plate and an arc-shaped guide plate. The two ends of the connecting plate are hinged to two groups of connecting rods, the middle part of the connecting plate is hinged to the outer rod of the push rod, the vertical pressure plate is fixed on the side of the connecting plate facing the shielding cover, the arc-shaped guide plate is fixed on the lower end of the vertical pressure plate, and the arc-shaped guide plate is bent toward the side away from the shielding cover.

4. A circuit board shielding cover welding device according to claim 1, characterized in that: The upper end of the outer limit plate is fixedly connected with a vertical rod, and the end plate is provided with a first limit hole and a second limit hole. After the vertical rod passes through the first limit hole, it is connected to the limit rod through a connecting plate. A slot is provided at the lower end of the limit rod, and the limit rod is used to limit the shielding cover after passing through the second limit hole; a spring is sleeved on the outer side of the vertical rod, and the upper end of the spring is connected to the connecting plate through a pressure sensor, and the lower end of the spring is connected to the outer limit plate. Before clamping the shielding cover, the clamping assembly is in an open state. After the shielding cover is inserted, the vertical rod can be driven to move upward by the limit rod, and the quick positioning assembly moves upward with the vertical rod. When the pressure of the pressure sensor reaches the set value, the movement stops.

5. The circuit board shielding cover welding equipment according to claim 1, characterized in that: The welding assembly includes a welding head, an eccentric rod, a center column, a first gear, a second gear and a first motor. The center column is rotatably arranged at the center of the end plate. The upper end of the center column is coaxially connected with the first gear. The second gear is meshed with the second gear. The second gear is driven to rotate by the first motor. The first motor is fixed on the end plate. One end of the eccentric rod is connected to the center column, and the other end of the eccentric rod is connected to the welding head.

6. A circuit board shielding cover welding device according to claim 5, characterized in that: The eccentric rod is provided with a guide rail groove along its length direction, a guide rail is slidably arranged in the guide rail groove, one end of the guide rail is fixedly connected to the welding head, a rack is fixed on the upper side of the guide rail, the rack is meshed with the third gear, the third gear is driven to rotate by the second motor, and the second motor is fixed on the eccentric rod.

7. A circuit board shielding cover welding device according to any one of claims 1 to 6, characterized in that: Two rotating rods are rotatably arranged on the end plate, and the two rotating rods are centrally symmetrical with respect to the welding assembly. The lower ends of the rotating rods are hinged with a first baffle and a second baffle at the same time. The first baffle and the second baffle are connected by an elastic connecting device and are connected at a right angle by the elastic connecting device. The rotating rod is connected to the output end of the third motor.

8. A circuit board shielding cover welding device according to claim 7, characterized in that: The end plate is provided with an open slot, the open slot extends along the radial direction of the welding assembly, the rotating rod is slidably disposed in the open slot, and the third motor is connected with a telescopic device.

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