Chip batch welding tooling

Abstract

The application relates to the technical field of auxiliary tooling, in particular to a chip batch welding tooling which comprises a positioning plate, a plurality of containing cavities for containing and positioning a pipe shell are arranged on the positioning plate, a plurality of positioning cavities for embedding and positioning a cover plate are arranged on the positioning plate, the containing cavities and the positioning cavities are communicated, and a placing step for supporting the cover plate is formed at the connection of the positioning cavities and the containing cavities; a plurality of magnetic attraction fixing blocks are arranged in the containing cavities, the magnetic attraction fixing blocks are connected with the positioning plate, and the magnetic attraction fixing blocks are used for penetrating and secondly positioning the pipe shell; a plurality of metal pressing blocks are arranged between the magnetic attraction fixing blocks and the cover plate, the metal pressing blocks are used for pressing the cover plate, and the metal pressing blocks are magnetically attracted to the magnetic attraction fixing blocks; the application has the effect that the reliable fixation of the cover plate is realized through the cooperation of the metal pressing blocks and the magnetic attraction fixing blocks, the possibility of displacement of the cover plate in the welding process is reduced, and the welding quality of the chip is improved.

Description

Technical Field

[0001] This application relates to the field of auxiliary tooling technology, and in particular to a tooling for mass chip soldering. Background Technology

[0002] Welding is one of the most common processing methods. After obtaining the product's external dimensions, the raw materials are cut into shapes, and then the pre-shaped materials are welded together according to the given external dimensions. During the welding process, it is necessary to control parameters such as the connection relationship between the two welded parts, the welding position, and the welding angle in real time; refer to Figure 1 and Figure 2 In the process of soldering chip products, it is necessary to solder and fix the shell and the cover plate. However, since chip products are fragile and the requirements for soldering quality are high, it is necessary to improve the design requirements of the tooling.

[0003] A prior art chip bonding positioning fixture is disclosed, comprising: a first positioning plate having a positioning groove for accommodating and positioning a substrate; a second positioning plate having a first positioning hole, the second positioning plate being located above the first positioning plate and the first positioning hole being aligned with the positioning groove, the first positioning hole being used to accommodate a frame for positioning the frame on the substrate, and the bottom of the frame being used to place a first solder pad between it and the substrate; a third positioning plate having a second positioning hole, the third positioning plate being used to be assembled within the frame so that the second positioning hole is aligned with a chip bonding position on the substrate, the second positioning hole being used to accommodate a chip, and the chip bonding position on the substrate being used to place a second solder pad between it and the chip; and a pressure block for simultaneously pressing the frame and the chip.

[0004] Regarding the aforementioned technologies, during the welding process, a pressure block is used to press and position the casing and cover plate. However, since heat needs to enter under the cover plate to heat the solder between the casing and the cover plate during the welding process, the size of the pressure block is limited, thus preventing the weight of the pressure block from becoming too large. This results in a poor pressing and positioning effect of the cover plate, and the welding internal stress generated during the welding process may cause the cover plate to shift, affecting the welding quality of the chip. Summary of the Invention

[0005] To improve the welding quality of chips, this application provides a chip mass welding fixture.

[0006] This application provides a chip mass welding fixture using the following technical solution: A chip mass soldering fixture, including The positioning plate has multiple receiving cavities for accommodating and positioning the tube shell in one step, and multiple positioning cavities for embedding and positioning the cover plate. The receiving cavity is connected to the positioning cavity, and the connection between the positioning cavity and the receiving cavity forms a placement step for supporting the cover plate. Multiple magnetic fixing blocks are located within the receiving cavity and connected to the positioning plate. The magnetic fixing blocks are used to pass through and reposition the tube shell. Multiple metal blocks are located between the magnetic fixing block and the cover plate. The metal blocks are used to press the cover plate and are magnetically fixed to the magnetic fixing block.

[0007] By employing the above technical solution, multiple tube shells are placed into multiple receiving cavities at once, and positioned according to the edge of the receiving cavity. At this point, the tube shell abuts against the magnetic fixing block, which provides multiple positioning points for secondary positioning of the tube shell. Then, the cover plate is placed in the positioning cavity, resting on the placement step. The cover plate is then positioned according to the corner of the positioning cavity. Finally, a metal pressure block is pressed onto the side of the cover plate away from the tube shell. The metal pressure block is magnetically attracted by the magnetic fixing block, and the cover plate is secured by its own gravity and magnetic attraction. Once the position is fixed, force is applied to the positioning plate, and the entire welding fixture, along with the welded product, is sent into the reflow oven for hot melt welding. The designed chip mass production welding fixture uses the positioning plate as a carrier to form multiple receiving cavities and positioning cavities to realize the receiving and positioning of the shell and the support placement of the cover plate. The shell can be repositioned by the magnetic fixing block, and the metal pressure block can be used in conjunction with the magnetic fixing block to reliably fix the cover plate, thereby reducing the possibility of displacement of the cover plate during the welding process and improving the welding quality of the chip.

[0008] In one specific implementation, the positioning plate has at least one rectangular groove, which communicates with both the receiving cavity and the positioning cavity, and the rectangular groove has a positioning notch for the corner of the cover plate to slide into.

[0009] By adopting the above technical solution, the designed rectangular groove can reduce the contact length with the edge of the cover plate while achieving cover plate positioning through the positioning notch, thereby reducing the dimensional accuracy requirements of the positioning cavity processing. At the same time, the uncovered part between the cover plate and the rectangular groove can also be used to supply heat to the area below the cover plate to heat the solder, thereby improving the welding quality.

[0010] In one specific implementation scheme, the positioning plate has at least one arc-shaped notch, which communicates with the positioning cavity, and the arc-shaped notch is used for the corner of the cover plate to extend into, so that the corner of the cover plate is offset from the positioning plate.

[0011] By adopting the above technical solution, the designed arc-shaped notch can reduce the contact length at the corners of the cover plate while achieving cover plate positioning, thereby reducing the dimensional accuracy requirements for the positioning cavity machining and avoiding damage to the corners of the cover plate.

[0012] In one specific implementation scheme, a discharge unit is also included, the discharge unit comprising: At least one main pipe is provided, which extends into the positioning plate, and the magnetic fixing block is provided with a control groove for the main pipe to pass through. A sliding tube, one end of which is used to connect to a gas source, and the other end extends into the main pipe. The sliding tube is slidably connected to the main pipe. Multiple air outlets are provided on the extension section of the sliding tube into the main pipe, and the air outlets are opened vertically. Multiple driving components are arranged along the sliding direction of the sliding tube and connected to the main pipe. An air source supplies air into the sliding tube, and the air is discharged from the air outlet, which drives the driving components to move and realize the lifting and lowering of the magnetic fixing block.

[0013] By adopting the above technical solution, after welding is completed and the solder material has cooled and solidified completely, the positioning plate is first inverted to separate the metal pressure block from the cover plate. Then, one end of the sliding tube is connected to the air source. At this time, high-pressure gas is sent into the sliding tube and applies force to the positioning plate to make the air outlet align with the driving component. The driving component applies force to the magnetic fixing block to make the magnetic fixing block rise. While the magnetic fixing block rises, it applies force to the cover plate to make the cover plate move away from the receiving cavity until the cover plate pops out. The operator applies force to the cover plate, and the cover plate drives the tube shell to detach from the receiving cavity, completing the material removal action. The designed material removal unit, through the main pipe and sliding tube, facilitates the provision of selectable power drive direction for the driving component. The driving component facilitates the lifting and lowering action of the magnetic fixing block as needed, thereby realizing the positioning of the tube shell by the magnetic fixing block before welding and the ejection of the cover plate after welding.

[0014] In one specific implementation, the drive includes Two limiting tubes are vertically connected to the main pipe. The two limiting tubes are located on the upper and lower sides of the main pipe, respectively. After the sliding tube slides, it can communicate with the inner cavity of the limiting tube. The two limiting tubes are staggered along the sliding direction of the sliding tube. Two abutment posts are slidably connected to the two limiting tubes respectively, and the abutment posts can abut against the inner wall of the control groove.

[0015] By adopting the above technical solution, after the sliding tube slides relative to the main pipe, the air outlet connects with the limiting tube located above the main pipe. The gas supplied by the high-pressure gas source to the sliding tube enters the limiting tube located above the main pipe through the air outlet and applies force to the abutment column, causing the abutment column above the main pipe to slide away from the main pipe and push the magnetic fixing block until the end of the limiting tube located below the main pipe away from the main pipe abuts against the bottom wall of the control groove, reaching the maximum stroke. At this time, the magnetic fixing block pushes out the cover plate. The designed driving component, through two sets of limiting tubes and abutment columns respectively set on the upper and lower sides of the main pipe, cooperates with the sliding tube to realize the separate driving of the two abutment columns, thereby completing the push-out action of the cover plate and the reset action of the magnetic fixing block.

[0016] In one specific implementation scheme, a locking spring is provided inside the main pipe. One end of the locking spring is connected to one end of the main pipe, and the other end is connected to the sliding tube. When the locking spring is in its naturally extended state, the air outlet is connected to the limiting tube located above the main pipe.

[0017] By adopting the above technical solution, the designed locking spring can keep the sliding tube connected to the limiting tube above the main pipe without the action of other external forces. Then, when hot melt welding is performed in the reflow oven, the air in the sealed chamber between the limiting tube below the main pipe and the abutment column expands, so that the magnetic fixing block is kept in the welding position.

[0018] In one specific implementation scheme, the abutment post is provided with an air blowing hole, the air blowing hole is vertically arranged in the axial direction, and the air blowing hole passes through the abutment post.

[0019] By adopting the above technical solution, the designed air blowing hole can facilitate the sliding retraction of the abutment column into the limiting tube.

[0020] In one specific implementation scheme, the magnetic fixing block is provided with a blowing hole, which is connected to the air blowing hole located above the main pipe.

[0021] By adopting the above technical solution, the cover plate can be blown out after the magnetic fixing block reaches its maximum push stroke, in conjunction with the air blowing hole. This further reduces the degree of manual intervention in the material handling process after soldering and enables automatic chip handling.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The designed chip mass welding fixture uses a positioning plate as a carrier to form multiple receiving cavities and positioning cavities to realize the receiving and positioning of the shell and the support placement of the cover plate. The shell can be repositioned by a magnetic fixing block, and the metal pressure block can be used in conjunction with the magnetic fixing block to reliably fix the cover plate, thereby reducing the possibility of displacement of the cover plate during the welding process and improving the welding quality of the chip.

[0023] 2. The designed chip mass welding fixture allows the sliding tube to remain connected to the limiting tube above the main pipe without the action of other external forces. Then, during hot melt welding in the reflow oven, the air in the sealed chamber between the limiting tube below the main pipe and the abutment column expands, so that the magnetic fixing block is kept in the welding position.

[0024] 3. The designed chip mass welding fixture can be used with air blow holes to blow out the cover plate after the magnetic fixing block reaches its maximum ejection stroke, further reducing the manual intervention in the material handling process after welding and realizing automatic chip handling. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the shell in this application.

[0026] Figure 2 This is a three-dimensional structural diagram of the shell and cover plate after welding in this application.

[0027] Figure 3 This is a schematic diagram of the chip mass welding fixture according to an embodiment of this application.

[0028] Figure 4 yes Figure 3 Enlarged view of section A.

[0029] Figure 5 yes Figure 3 A partial structural diagram after adding the discharge unit.

[0030] Figure 6 yes Figure 5 A sectional view.

[0031] Figure 7 yes Figure 6 Enlarged schematic diagram of part B.

[0032] Figure 8 yes Figure 6 Enlarged schematic diagram of part C.

[0033] Explanation of reference numerals in the attached drawings: 01, tube shell; 02, cover plate; 1, positioning plate; 11, receiving cavity; 12, positioning cavity; 13, rectangular groove; 14, positioning notch; 15, arc-shaped notch; 2, magnetic fixing block; 21, control groove; 22, blowing hole; 3, metal pressure block; 4, discharge unit; 41, main pipe; 42, sliding pipe; 421, air outlet; 43, driving component; 431, limiting pipe; 432, abutting post; 4321, blowing hole; 5, locking spring. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 3-8 This application will be described in further detail.

[0035] This application discloses a chip mass production soldering fixture.

[0036] Reference Figure 3 and Figure 4 A chip mass welding fixture includes a positioning plate 1, on which a plurality of receiving cavities 11 are formed. The plurality of receiving cavities 11 are arranged in a rectangular array. The receiving cavities 11 are used to receive a shell 01, and the sidewalls of the receiving cavities 11 are processed according to the shape of the shell 01 for initial positioning of the shell 01. The positioning plate 1 also has a plurality of positioning cavities 12, the number of which corresponds to the number of receiving cavities 11. The size of the positioning cavities 12 is adapted to the size of the cover plate 02 for positioning the cover plate 02. The positioning cavities 12 are connected to the receiving cavities 11, and a placement step for supporting the cover plate 02 is formed at the connection interface between the positioning cavities 12 and the receiving cavities 11.

[0037] Reference Figure 4 In order to reduce the contact length between the positioning plate 1 and the cover plate 02 while facilitating the positioning of the cover plate 02, at least one rectangular groove 13 is provided on the positioning plate 1. The rectangular groove 13 is connected to both the receiving cavity 11 and the positioning cavity 12. A positioning notch 14 is provided on one side of the rectangular groove 13 for the corner of the cover plate 02 to slide into. The side wall of the positioning notch 14 abuts against the corner of the cover plate 02 to achieve positioning, and the positioning notch 14 is rounded.

[0038] Reference Figure 4 In order to further reduce the wear on the cover plate 02 during positioning and reduce the impact of the machining accuracy of the positioning cavity 12 on the placement of the cover plate 02, at least one arc-shaped notch 15 is provided on the positioning plate 1. The arc-shaped notch 15 is connected to the positioning cavity 12. The arc-shaped notch 15 is used for the corners of the cover plate 02 to extend into, and the corners of the cover plate 02 are staggered from the positioning plate 1 to reduce the wear on the corners of the cover plate 02.

[0039] Reference Figure 5In order to reliably fix the position of the cover plate 02 during the welding process to improve the chip welding quality, a magnetic fixing block 2 and a metal pressure block 3 are also included. There are multiple magnetic fixing blocks 2. In this application, the number of magnetic fixing blocks 2 corresponds to the number of receiving cavities 11. The magnetic fixing blocks 2 are located in the receiving cavity 11 and are connected to the positioning plate 1, and are used to realize the secondary positioning of the tube shell 01. The metal pressure block 3 is placed on the side of the cover plate 02 away from the tube shell 01. The metal pressure block 3 can be magnetically attracted to the magnetic fixing blocks 2. The cover plate 02 is pressed by gravity and the magnetic attraction force applied to the metal pressure block 3 by the magnetic fixing blocks 2.

[0040] Reference Figure 6 and Figure 7 In order to achieve rapid chip product unloading after welding, a feeding unit 4 is also included. The feeding unit 4 includes a main pipe 41, a sliding tube 42 and a driving component 43. The number of main pipes 41 is at least one. In this application, the number of main pipes 41 is four. The four main pipes 41 are arranged in parallel. The main pipes 41 extend into the positioning plate 1 and simultaneously pass through multiple receiving cavities 11 in the same longitudinal row. A control groove 21 is provided on the magnetic fixing block 2, and the main pipes 41 are set through the control groove 21.

[0041] Reference Figure 7 and Figure 8 In this application, the number of sliding tubes 42 is the same as the number of main pipes 41. One end of the sliding tube 42 is used to connect to a high-pressure gas source, and the other end extends into the main pipe 41. The sliding tube 42 is slidably connected to the main pipe 41. Multiple air outlets 421 are provided on the extension section of the sliding tube 42 that extends into the main pipe 41. The air outlets 421 are provided on the sliding tube 42 along the sliding direction of the sliding tube 42. In this application, the number of air outlets 421 is eight, and the air outlets 421 are arranged to penetrate the sliding tube 42 in a vertical direction.

[0042] Reference Figure 7 and Figure 8 In order to facilitate the lifting and lowering of the magnetic fixing block 2, there are multiple driving components 43. The multiple driving components 43 are arranged along the sliding direction of the sliding tube 42 and the driving components 43 are connected to the main pipe 41. The high-pressure gas source inputs gas into the sliding tube 42 and the gas is discharged from the air outlet 421, which drives the driving components 43 to move and realize the lifting and lowering of the magnetic fixing block 2.

[0043] Reference Figure 7 and Figure 8Furthermore, the driving component 43 includes two limiting tubes 431 and two abutment posts 432. The limiting tubes 431 and the abutment posts 432 are both vertically welded to the main pipe 41, and the inner cavity of the limiting tube 431 is connected to the inner cavity of the main pipe 41. The two limiting tubes 431 are located on the upper and lower sides of the main pipe 41, respectively, and the two limiting tubes 431 are staggered along the sliding direction of the sliding tube 42. After the sliding tube 42 slides, it can pass through the air outlet 4. 21 achieves communication with the inner cavity of the limiting tube 431; the abutment post 432 is slidably connected inside the limiting tube 431, and the abutment post 432 can abut against the inner wall of the control groove 21 after sliding. In this application, the diameter of the air outlet 421 is set smaller than the inner diameter of the limiting tube 431 to avoid the abutment post 432 falling into the sliding tube 42 and getting stuck, and the length of the abutment post 432 located above the main pipe 41 is greater than the length of the abutment post 432 located below the main pipe 41.

[0044] Reference Figure 7 and Figure 8 In order to fix the position of the magnetic fixing block 2 during heating and welding in the reflow oven, a locking spring 5 is provided in the main pipe 41. The locking spring 5 is located at the end of the sliding tube 42 away from the gas source, and one end of the locking spring 5 abuts against the main pipe 41, and the other end abuts against the sliding tube 42. When the locking spring 5 is in the naturally extended state, the air outlet 421 is connected to the limiting tube 431 located above the main pipe 41. Then, when hot melt welding is performed in the reflow oven, the air in the sealed chamber between the limiting tube 431 located below the main pipe 41 and the abutment column 432 expands, so that the magnetic fixing block 2 is kept in the welding position.

[0045] Reference Figure 7 and Figure 8 To facilitate the sliding and retraction of the abutment post 432 into the limiting tube 431, an air blowing hole 4321 is provided on the abutment post 432. The air blowing hole 4321 is vertically arranged in the axial direction and passes through the abutment post 432. In order to further realize the automation of chip picking and reduce manual intervention, a blowing hole 22 is also provided on the magnetic fixing block 2. The blowing hole 22 is connected to the air blowing hole 4321 located above the main pipe 41. After the abutment post 432 slides into place, high-pressure gas is discharged through the blowing hole 22 to blow out the chip.

[0046] The implementation principle of a chip mass welding fixture according to an embodiment of this application is as follows: Multiple shells 01 are placed into multiple receiving cavities 11 at one time, and positioned according to the edge position of the receiving cavity 11. At this time, the shell 01 abuts against the magnetic fixing block 2. The magnetic fixing block 2 provides multiple positioning points for the shell 01 for secondary positioning. Then, the cover plate 02 is placed in the positioning cavity 12. At this time, the cover plate 02 is placed on the placement step. Then, the cover plate 02 is positioned according to the corner position of the positioning cavity 12. Finally, the metal pressure block 3 is pressed on the side of the cover plate 02 away from the shell 01. The metal pressure block 3 is magnetically attracted by the magnetic fixing block 2. The position of the cover plate 02 is fixed by its own gravity and the magnetic attraction force. Then, force is applied to the positioning plate 1, and the welding fixture and the welding product are sent into the reflow oven for hot melt welding.

[0047] After soldering is completed and the solder has cooled and solidified completely, the positioning plate 1 is inverted to separate the metal pressure block 3 from the cover plate 02. Then, one end of the sliding tube 42 is connected to the air source. At this time, high-pressure gas is sent into the sliding tube 42 and applies force to the positioning plate 1 so that the air outlet 421 is connected to the driving component 43. The driving component 43 applies force to the magnetic fixing block 2 so that the magnetic fixing block 2 rises. At the same time as the magnetic fixing block 2 rises, it applies force to the cover plate 02 so that the cover plate 02 moves away from the receiving cavity 11 until the cover plate 02 pops out. After the abutment post 432 slides into place, the high-pressure gas is discharged through the blowing hole 22 to blow out the chip, completing the chip picking action.

[0048] After the material is picked up, force is applied to the positioning plate 1, causing the positioning plate 1 and the sliding tube 42 to move relative to each other. The locking spring 5 is compressed. At this time, the air outlet 421 is connected to the limiting tube 431 located below the main pipe 41. The abutment column 432 located below the main pipe 41 slides towards the end away from the main pipe 41 under the action of the high-pressure air source and pushes the magnetic fixing block 2 to reset.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A chip mass production soldering fixture, characterized in that: The device includes a positioning plate (1), which has multiple receiving cavities (11) for accommodating and positioning the tube shell (01) in one go, and multiple positioning cavities (12) for embedding and positioning the cover plate (02). The receiving cavity (11) is connected to the positioning cavity (12), and the connection between the positioning cavity (12) and the receiving cavity (11) forms a placement step for supporting the cover plate (02). Multiple magnetic fixing blocks (2) are located in the receiving cavity (11) and are connected to the positioning plate (1). The magnetic fixing blocks (2) are used to pass through and reposition the tube shell (01). Multiple metal blocks (3) are used to press the cover plate (02). The metal blocks (3) are placed on the side of the cover plate (02) away from the tube shell (01). The metal blocks (3) can be magnetically attracted to the magnetic fixing block (2). The cover plate (02) is pressed by gravity and the magnetic force applied to the metal blocks (3) by the magnetic fixing block (2). It also includes a discharge unit (4), which includes at least one main pipe (41) that extends into the positioning plate (1) and has a control groove (21) on the magnetic fixing block (2) for the main pipe (41) to pass through; and a sliding tube (42), one end of which is connected to an air source and the other end extends into the main pipe (41), and the sliding tube (42) is slidably connected to the main pipe (41). Multiple air outlets (421) are provided on the extension section of the main pipe (41), and the air outlets (421) are opened through in the vertical direction; multiple driving members (43) are provided, and the multiple driving members (43) are arranged along the sliding direction of the sliding tube (42), and the driving members (43) are connected to the main pipe (41). The air source supplies air into the sliding tube (42), and the gas is discharged from the air outlets (421), which drives the driving members (43) to move and realize the lifting and lowering of the magnetic fixing block (2); The driving component (43) includes two limiting tubes (431), which are vertically connected to the main pipe (41). The two limiting tubes (431) are located on the upper and lower sides of the main pipe (41), respectively. The sliding tube (42) can communicate with the inner cavity of the limiting tube (431) after sliding, and the two limiting tubes (431) are staggered along the sliding direction of the sliding tube (42). Two abutting posts (432) are slidably connected to the two limiting tubes (431), and the abutting posts (432) can abut against the inner wall of the control groove (21). An air blowing hole (4321) is provided on the abutment post (432). The air blowing hole (4321) is vertically arranged in the axial direction and is provided through the abutment post (432). A locking spring (5) is provided inside the main pipe (41). One end of the locking spring (5) is connected to one end of the main pipe (41), and the other end is connected to the sliding tube (42). When the locking spring (5) is in a naturally extended state, the air outlet (421) is connected to the limiting tube (431) located above the main pipe (41). A blowing hole (22) is provided on the magnetic fixing block (2). The blowing hole (22) is connected to the air blowing hole (4321) located above the main pipe (41).

2. The chip mass production soldering fixture according to claim 1, characterized in that: At least one rectangular groove (13) is provided on the positioning plate (1), the rectangular groove (13) is connected to both the receiving cavity (11) and the positioning cavity (12), and the rectangular groove (13) is provided with a positioning notch (14) for the corner of the cover plate (02) to slide into.

3. The chip mass production soldering fixture according to claim 1, characterized in that: At least one arc-shaped notch (15) is provided on the positioning plate (1). The arc-shaped notch (15) is connected to the positioning cavity (12). The arc-shaped notch (15) is used for the corner of the cover plate (02) to extend into it, and the corner of the cover plate (02) is offset from the positioning plate (1).

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