BGA repair tool capable of adjusting heating wind speed and flow

Abstract

The utility model provides a BGA repair tool capable of adjusting the heating air speed and flow, and belongs to the technical field of BGA repair. The BGA repair tool specifically comprises an air nozzle, an air baffle and a flow control plate; one end of a shell of the tuyere serves as an air inlet, the other end of the shell serves as an air outlet, a wind shield is installed on the air outlet of the shell, a flow control plate is rotatably installed on the wind shield, and through holes are formed in the centers of the wind shield and the flow control plate. A plurality of first through holes evenly distributed in the circumferential direction of the center of the penetrating hole are formed in the periphery of the penetrating hole of the wind shield and the flow control plate, the centers of the first through holes are distributed on a first circle, and a plurality of second through holes evenly distributed in the circumferential direction of the first circle are formed in the periphery of the first circle of the wind shield and the flow control plate. The centers of the second through holes are distributed on a second circle, and third through holes are formed in the area, between every two adjacent second through holes, of the wind shield and the flow control plate. And the welding quality problem caused by non-uniform heating temperature during BGA welding is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of BGA repair, in particular to a BGA repair tool capable of adjusting heating air speed and flow. BACKGROUND

[0002] BGA is the full name of Ball Grid Array, which is a packaging method of integrated circuits using organic carrier board. When BGA devices are repaired, special repair equipment is required to perform device desoldering and soldering. In the soldering process of BGA, as the size of the nozzle increases, the temperature difference between the middle region and the peripheral region of the device during heating is large, which may cause liquidus time delay (LTD) and increase the probability of HoP defects and pillow effect in BGA soldering. In addition, as the size of the device increases, more heat is required during desoldering or soldering in the local heating repair workstation environment, so the temperature is higher and the soldering time is longer, which may cause the risk of device thermal damage failure. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a BGA repair tool capable of adjusting heating air speed and flow, which solves the problems in the prior art and ensures that the heating temperature of the device center and the surrounding area is consistent during BGA soldering, thereby eliminating the soldering quality problems caused by uneven heating temperature.

[0004] The BGA repair tool capable of adjusting heating air speed and flow provided by the present application adopts the following technical scheme:

[0005] A BGA repair tool capable of adjusting heating air speed and flow, comprising a nozzle, a wind shield and a flow control plate.

[0006] The nozzle comprises a shell with two open ends, one end of the shell serving as an air inlet, and the other end of the shell serving as an air outlet. The wind shield is installed on the air outlet of the shell. The flow control plate is rotatably installed on the side of the wind shield opposite to the air inlet. The centers of the wind shield and the flow control plate are provided with a through hole for a suction rod to pass through. The flow control plate rotates around the central axis of the through hole.

[0007] The wind shield and the flow control plate are each provided with a plurality of first through holes uniformly distributed in the circumferential direction of the through hole at the center of the first through hole. The centers of the first through holes are distributed on a first circle. The wind shield and the flow control plate are provided with a plurality of second through holes uniformly distributed in the circumferential direction of the first circle at the outer periphery of the first circle. The centers of the second through holes are distributed on a second circle. A third through hole is provided on the region between two adjacent second through holes on the wind shield and the flow control plate. The center of the third through hole is distributed on the second circle.

[0008] The second through hole is larger than the third through hole.

[0009] Optionally, the perforations are circular, and the perforations on the wind baffle and the flow control plate are coaxial.

[0010] Optionally, the first through hole, the second through hole and the third through hole are circular, and the inner diameter of the second through hole is greater than the inner diameter of the third through hole.

[0011] Optionally, the wind baffle is square, the side length of the wind baffle is b, the radius of the second through hole is a, the radius of the first through hole and the third through hole is c, a is 10% b to 20% b, and c is 50% to 70% a.

[0012] Optionally, the circumferential distance between the centers of two adjacent first through holes on the first circle is greater than or equal to the diameter of the first through hole, and the circumferential distance between the centers of two adjacent second through holes on the second circle is greater than or equal to the diameter of the second through hole.

[0013] Optionally, the flow control plate is provided with a plurality of arc-shaped through grooves circumferentially distributed on the first circle on the outer periphery of the second circle, the arc-shaped through grooves and the second circle are coaxially arranged, the wind baffle is provided with a fastening bolt passing through the arc-shaped through groove and the wind baffle and being screw-connected, and the head of the bolt is located on the side of the flow control plate facing away from the air inlet.

[0014] Optionally, the side wall of the outlet end of the shell is provided with a plurality of pressure relief holes, and the plurality of pressure relief holes are uniformly distributed circumferentially along the side wall of the shell.

[0015] Optionally, the shell is rectangular in the cross section perpendicular to the air inlet direction, the wind baffle is a rectangular plate, the wind baffle is connected to the inner wall of the shell, the wind baffle is provided with a plurality of wind groups on the outer peripheral region of the second circle, each wind group includes a plurality of ventilation holes, the plurality of wind groups are distributed from the outside to the inside, a single wind group forms a rectangle, each side of the wind group of a single rectangular group corresponds to each side of the wind baffle, the number of ventilation holes corresponding to the same side of the wind baffle of different wind groups is the same and aligned with each other, the ventilation holes on each side of a single wind group are uniformly distributed, and the number of ventilation holes on different sides is consistent, and the size and shape of the ventilation holes and the third through hole are consistent.

[0016] In summary, the present application has the following beneficial technical effects:

[0017] By adjusting the rotation angle of the flow control plate, the hot air changes the original flow rate and air volume, avoiding the hot air directly acting on the device surface to cause the device to heat up, resulting in a large temperature difference between the middle and peripheral regions of the device, increasing the probability of HoP defects and pillow effect in BGA welding. In addition, as the size of the device increases, in the local heating repair workstation environment, when disassembling or welding, more heat is needed. The structure of the tooling is made of aviation aluminum alloy, which can not only deform the tooling after heating, but also ensure that the heat of the solder joint is not affected by the fixed tooling and is lost, ensuring the reliability of the solder joint. The structure is simple and easy to manufacture, and can be used repeatedly. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Fig. 1 The overall structure diagram of the BGA repair tool of the present application with adjustable heating air speed and flow;

[0020] Fig. 2 Another perspective view of the structure of the BGA repair tool of the present application with adjustable heating air speed and flow;

[0021] Fig. 3 The exploded view of the BGA repair tool of the present application with adjustable heating air speed and flow.

[0022] Explanation of reference signs: 1, air nozzle; 11, shell; 12, mounting plate; 13, pressure relief hole; 2, baffle; 21, air vent; 3, flow control plate; 31, arc-shaped through slot; 32, bolt; 4, perforation; 41, first through hole; 42, second through hole; 43, third through hole. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in detail below with reference to the drawings.

[0024] Following, the embodiments of the present application are described through specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and various modifications or changes can be made to the details in the specification based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] It should be noted that the various aspects of the embodiments described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that an aspect can be implemented both as any number of software running on a device and / or as an apparatus.

[0026] It should also be noted that the figures provided in the following embodiments are only to illustrate the basic concepts of the present application in a schematic manner, and only show the components related to the present application in the figures, not drawn according to the number, shape and size of the components in actual implementation, and the shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the layout pattern of the components can be more complex.

[0027] In addition, in the following description, specific details are provided in order to facilitate a thorough understanding of examples. However, one skilled in the art will understand that the aspects described can be practiced without these specific details.

[0028] The embodiments of the present application provide a BGA repair tool capable of adjusting heating air speed and flow.

[0029] As shown in Figs. 1 to 3 A BGA repair tool capable of adjusting heating air speed and flow includes a nozzle 1, a wind shield 2 and a flow control plate 3.

[0030] The air nozzle 1 comprises a shell 11 with both ends open, one end of the shell 11 as an air inlet, the other end of the shell 11 as an air outlet, the air baffle 2 is installed on the air outlet of the shell 11, the flow control plate 3 is rotatably installed on the side of the air baffle 2 facing away from the air inlet, the air baffle 2 and the flow control plate 3 are provided with a through hole 4 for the suction rod to pass through in the center, the flow control plate 3 rotates around the central axis of the through hole 4, and the central axis of the through hole 4 coincides with the central axis of the air outlet.

[0031] The air baffle 2 and the flow control plate 3 are provided with a plurality of first through holes 41 uniformly distributed around the through hole 4 in the circumferential direction of the through hole 4, the centers of the first through holes 41 are distributed on a first circle, the air baffle 2 and the flow control plate 3 are provided with a plurality of second through holes 42 uniformly distributed around the first circle in the circumferential direction of the first circle, the centers of the second through holes 42 are distributed on a second circle, the first circle and the second circle are concentric, and the third through holes 43 are provided on the area between two adjacent second through holes 42 on the air baffle 2 and the flow control plate 3, the centers of the third through holes 43 are distributed on the second circle; the second through hole 42 is larger than the third through hole 43, when the first through hole 41 on the flow control plate 3 and the first through hole 41 on the air baffle 2 completely coincide, the second through hole 42 on the flow control plate 3 and the second through hole 42 on the air baffle 2 completely coincide, and the third through hole 43 on the flow control plate 3 and the third through hole 43 on the air baffle 2 completely coincide, when the overlapping area of the first through hole 41 on the flow control plate 3 and the first through hole 41 on the air baffle 2 is smallest, the overlapping area of the second through hole 42 on the flow control plate 3 and the second through hole 42 on the air baffle 2 is smallest, and the overlapping area of the third through hole 43 on the flow control plate 3 and the third through hole 43 on the air baffle 2 is smallest. In the embodiment of the application, the number of first through holes 41 and second through holes 42 is the same

[0032] By controlling the rotation of the flow control plate 3 relative to the air baffle 2, the overlapping area of the first through hole 41 on the flow control plate 3 and the first through hole 41 on the air baffle 2 is adjusted, the overlapping area of the second through hole 42 on the flow control plate 3 and the second through hole 42 on the air baffle 2 is adjusted, and the overlapping area of the third through hole 43 on the flow control plate 3 and the third through hole 43 on the air baffle 2 is adjusted; when the first through hole 41, the second through hole 42 and the third through hole 43 of the flow control plate 3 and the air baffle 2 all coincide, at this time the air outlet of the air nozzle 1 has the maximum air outlet capacity, when the second through hole 42 of the flow control plate 3 and the third through hole 43 of the air baffle 2 are completely aligned, the overlapping area of the first through hole 41 of the flow control plate 3 and the air baffle 2 is smallest, at this time the air outlet of the air nozzle 1 has the minimum air outlet capacity. By adjusting the rotation angle of the flow control plate 3, the air outlet capacity of the air outlet of the air nozzle 1 is controlled.

[0033] The side wall of the outlet end of the shell 11 is provided with a plurality of pressure relief holes 13, which are uniformly distributed along the circumference of the side wall of the shell 11, and the pressure relief holes 13 are located on the side of the wind baffle 2 facing the air outlet. In the case where the air volume at the air inlet remains unchanged, when the overlapping area of the flow control and the through hole on the wind baffle 2 changes from large to small, the pressure in the shell 11 will increase, and the design of the pressure relief hole 13 can reduce the increase of the pressure in the shell 11, avoiding the increase of the pressure in the shell which leads to the increase of the flow rate of the air outlet, thereby affecting the adjustment effect of the air volume of the air outlet by the tool, so that the rotating flow control plate 3 can effectively adjust the air volume of the air outlet.

[0034] The shell 11 is rectangular in cross section perpendicular to the air inlet direction. In the embodiment of the present application, the air inlet side of the shell 11 is provided with a mounting plate 12, the center of which is provided with an opening, the mounting plate 12 is partially located in the air inlet range, the mounting plate 12 partially protrudes from the outer side wall of the shell 11, and the part of the mounting plate 12 protruding from the outer wall of the shell 11 is provided with mounting holes. The length of the shell 11 along the air inlet direction is 49mm, and the heating area of the nozzle 1 should be controlled to be greater than the size of BGA to ensure that other device solder joints are not affected by melting during the heating process.

[0035] The wind baffle 2 is a rectangular plate, and the wind baffle 2 and the inner wall of the shell 11 are connected, and the wind baffle 2 and the shell 11 are welded together. The wind baffle 2 is provided with a plurality of wind groups on the outer peripheral area of the second circle, each wind group includes a plurality of ventilation holes 21, and the plurality of wind groups are sequentially distributed from the outside to the inside. Each side of a single wind group forms a rectangle, and each side of a single rectangular ring corresponds to each side of the wind baffle 2. The number of ventilation holes 21 corresponding to the same side of the wind baffle 2 in different wind groups is the same and aligned with each other. The ventilation holes 21 and the third through hole 43 are uniformly distributed on each side of the single wind group, and the number of ventilation holes 21 on different sides is consistent. The size and shape of the ventilation hole 21 and the third through hole 43 are the same. The ventilation hole 21 makes the center and the periphery of the wind baffle 2 have an air outlet area, thereby improving the uniformity of the air outlet in different areas.

[0036] In the embodiment of the present application, the perforation 4 is circular, and the perforation 4 on the wind baffle 2 and the flow control plate 3 is coaxial. The first through hole 41, the second through hole 42 and the third through hole 43 are circular, and the inner diameter of the second through hole 42 is greater than the inner diameter of the third through hole 43. The wind baffle 2 is square, and the side length of the wind baffle 2 is b, the radius of the second through hole 42 is a, the radius of the first through hole 41 and the third through hole 43 is c, a is 10% b to 20% b, and c is 50% to 70% a. In the embodiment of the present application, the radius of the first through hole 41 and the third through hole 43 is 1.5mm, and the radius of the second through hole 42 is 2.5mm.

[0037] The circumferential distance between the centers of two adjacent first through holes 41 on the first circle is greater than or equal to the diameter of the first through hole 41, the circumferential distance between the centers of two adjacent second through holes 42 on the second circle is greater than or equal to the diameter of the second through hole 42, and one third through hole 43 is arranged between every two second through holes 42, and the third through holes 43 are uniformly distributed on the second circle.

[0038] The flow control plate 3 is provided with a plurality of arc-shaped through grooves 31 circumferentially distributed on the first circle on the outer periphery of the second circle, the arc-shaped through grooves 31 and the second circle are coaxially arranged, the wind deflector 2 is provided with a fastening bolt 32 threaded through the arc-shaped through groove 31 and the wind deflector 2, and the head of the bolt 32 is located on the side of the flow control plate 3 opposite to the air inlet. Loosen the bolt 32, under the guiding and limiting action of the bolt 32, the flow control plate 3 can rotate relative to the wind deflector 2 around the center of the through hole 4, tighten the bolt 32 to fix the flow control plate 3 and the wind deflector 2, and avoid the random rotation of the flow control plate 3 causing the air outlet to change the air volume. In the embodiment of the application, the arc-shaped through grooves 31 are four and are located outside the range of the second through hole 42 and are uniformly distributed around the circumference of the second circle, and the total length of the four arc-shaped through grooves 31 is greater than 50% of the circumference of the circle where the arc-shaped through grooves 31 are located.

[0039] In one embodiment, the shell 11, the wind deflector 2 and the flow control plate 3 are made of aviation stainless steel aluminum alloy material to ensure that the tooling is resistant to deformation after being heated for many times.

[0040] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any changes or replacements within the technical range disclosed in the present application can be easily thought by those skilled in the art, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A BGA repair tool capable of adjusting heating air speed and flow, characterized in that, The air nozzle (1), the air baffle (2) and the flow control plate (3) are provided. The air nozzle (1) comprises a shell (11) with two open ends, one end of the shell (11) serving as an air inlet, the other end of the shell (11) serving as an air outlet, the air baffle (2) being installed on the air outlet of the shell (11), and the flow control plate (3) being rotatably installed on the side of the air baffle (2) opposite to the air inlet, the air baffle (2) and the flow control plate (3) being provided with a through hole (4) in the center for the suction rod to pass through, and the flow control plate (3) rotating around the central axis of the through hole (4). The air baffle (2) and the flow control plate (3) are provided with a plurality of first through holes (41) uniformly distributed around the through hole (4) on the outer periphery of the through hole (4), the centers of the first through holes (41) being distributed on a first circle, the air baffle (2) and the flow control plate (3) being provided with a plurality of second through holes (42) uniformly distributed around the first circle on the outer periphery of the first circle, the centers of the second through holes (42) being distributed on a second circle, and the third through holes (43) being provided on the regions between adjacent two second through holes (42) on the air baffle (2) and the flow control plate (3), the centers of the third through holes (43) being distributed on the second circle. The second through hole (42) is larger than the third through hole (43).

2. The adjustable heated air velocity and flow BGA rework tooling of claim 1, wherein, The through hole (4) is circular, and the through holes (4) on the air baffle (2) and the flow control plate (3) are coaxial.

3. The adjustable heated air velocity and flow BGA rework tooling of claim 1, wherein, The first through hole (41), the second through hole (42) and the third through hole are all circular, and the inner diameter of the second through hole (42) is larger than the inner diameter of the third through hole (43).

4. The adjustable heated air velocity and flow BGA rework tooling of claim 3, wherein, The air baffle (2) is square, the side length of the air baffle (2) is b, the radius of the second through hole (42) is a, the radius of the first through hole (41) and the third through hole (43) is c, a is 10% b to 20% b, and c is 50% to 70% a.

5. The adjustable heated air velocity and flow BGA rework tooling of claim 3, wherein, The circumferential distance between the centers of adjacent two first through holes (41) on the first circle is greater than or equal to the diameter of the first through hole (41), and the circumferential distance between the centers of adjacent two second through holes (42) on the second circle is greater than or equal to the diameter of the second through hole (42).

6. The adjustable heated air velocity and flow BGA rework tooling of claim 1, wherein, The flow control plate (3) is provided with a plurality of arc-shaped through grooves (31) distributed around the first circle on the outer periphery of the second circle, the arc-shaped through grooves (31) and the second circle being coaxially arranged, the air baffle (2) being provided with fastening bolts (32) passing through the arc-shaped through grooves (31) and being threadedly connected with the air baffle (2), and the heads of the bolts (32) being located on the side of the flow control plate (3) opposite to the air inlet.

7. The adjustable heated air velocity and flow BGA rework tooling of claim 1, wherein, The side wall of the air outlet end of the shell (11) is provided with a plurality of pressure relief holes (13) uniformly distributed around the side wall of the shell (11).

8. The adjustable heated air velocity and flow BGA rework tooling of claim 1, wherein, The shell (11) is rectangular in cross section perpendicular to the air inlet direction, the air baffle (2) is a rectangular plate, the air baffle (2) is connected with the inner wall of the shell (11), the air baffle (2) is provided with a plurality of wind groups on the outer peripheral area of the second circle, each wind group includes a plurality of air holes (21), the plurality of wind groups are sequentially distributed from the outside to the inside, a single wind group forms a rectangle, and each side of the wind group of a single rectangular ring corresponds to each side of the air baffle (2), the air holes (21) of the corresponding air baffle (2) on the same side of different wind groups are the same in number and aligned with each other, the air holes (21) on each side of a single wind group are uniformly distributed, and the number of air holes (21) on different sides is consistent, and the size and shape of the air holes (21) and the third through hole (43) are consistent.

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