CN113182661A

CN113182661A - Electronic packaging plate welding process and electromagnetic pulse welding equipment thereof

Info

Publication number: CN113182661A
Application number: CN202110558483.7A
Authority: CN
Inventors: 姚宗湘; 刘义凯; 尹立孟; 王刚; 陈玉华; 王善林; 冉洋
Original assignee: Chongqing University of Science and Technology
Current assignee: Chongqing University of Science and Technology
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-07-30
Anticipated expiration: 2041-05-21
Also published as: CN113182661B

Abstract

The invention discloses an electronic packaging plate welding process, which comprises material preparation, tooling equipment, alignment, welding and post-welding treatment, wherein the welding is electromagnetic pulse welding, and a background field around a substrate to be welded is shielded or weakened before the welding, and the equipment used for the welding comprises: the circuit that power, switch, electric capacity, work coil are constituteed and an outer cover section of thick bamboo, loose wheel, supporting disk, coil are close to the position of waiting to weld, often still are provided with magnetism collector between coil and work piece, concentrate the magnetic field that produces the coil at the axle center position through magnetism collector, magnetism collector and work coil install on two supporting disks of difference, and the supporting disk is arranged in an outer cover section of thick bamboo to can be in an outer cover section of thick bamboo along its axis up-and-down motion, an outer cover section of thick bamboo is that magnetic shield material can weaken or even completely cut off external magnetic field, the loose wheel is located the bottom surface of an outer cover section of thick bamboo for an outer cover section of thick bamboo can slide on the work piece, is convenient for find the processing position.

Description

Electronic packaging plate welding process and electromagnetic pulse welding equipment thereof

Technical Field

The invention belongs to the technical field of electronic packaging processing, and particularly relates to an electronic packaging plate welding process and electromagnetic pulse welding equipment thereof.

Background

The "packaging technology" is a technology for packaging an integrated circuit with an insulating plastic or ceramic material, and takes a CPU as an example, and the actual volume and appearance are not the real size and appearance of a CPU core, but a product obtained by packaging components such as the CPU core. Packaging technology is necessary for the chip and is also vital, because the chip must be isolated from the outside to prevent the electrical performance degradation caused by the corrosion of the chip circuit by impurities in the air; on the other hand, the packaged chip is more convenient to mount and transport.

The plate material welding in the traditional electronic packaging process is usually performed by a hot-melt welding method such as soldering, and the traditional hot-melt welding method usually generates a large heat affected zone, the generation of thermal stresses in the sheet, which would reduce the service life, and for the welding of dissimilar materials, because different materials have different melting points and the welding effect of the hot melting welding is not good, different electromagnetic pulse welding in a welding machine is also applied in the field, the electromagnetic pulse welding is carried out by utilizing electromagnetic energy generated by the discharge of a capacitor bank through an induction coil, the welding mechanism is similar to explosion welding, the heat affected zone generated in the welding process is smaller, but the electromagnetic pulse welding takes the electromagnetic force generated by a coil as power, in actual production, a same production workshop often has a plurality of devices, and magnetic fields of the devices interfere with each other, so that the final processing effect is influenced.

The prior art electromagnetic pulse welding apparatus generally comprises: the circuit that power, switch, electric capacity, coil are constituteed, and the coil is close to the position of treating the welding, still often is provided with the magnetism collector between coil and work piece, concentrates on the axle center position through the magnetic field that the magnetism collector produced the coil, but the quality of prior art's electromagnetic pulse welding equipment coil part is great, and it is inconvenient to remove, and is comparatively inconvenient when adjusting welding position well.

Disclosure of Invention

The invention aims to provide an electronic packaging plate welding process and electromagnetic pulse welding equipment thereof, which can reduce heat input quantity without influencing welding effect through electromagnetic pulse welding, have reasonable structure, can flexibly move on a substrate, are convenient to align a processing position, and have the function of shielding a magnetic field by an outer cover cylinder, thereby improving use effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

an electronic packaging plate welding process comprises the following steps: the method comprises the steps of material preparation, tooling equipment, alignment, welding and post-welding treatment, wherein the welding is electromagnetic pulse welding, and the background field around a substrate to be welded is shielded or weakened before welding, so that the interference to the magnetic field of a working coil is reduced.

Furthermore, before the welding step, a magnetic shielding material is arranged on the outer side of the workpiece to enclose the welding position, so that the influence of a background field on a processing part is reduced, and then the electromagnetic pulse welding equipment is put into the welding step for welding.

An electromagnetic pulse welding apparatus comprising: a passage consisting of a power supply, a switch, a capacitor and a working coil, wherein the coil is close to a part to be welded, a magnetic collector is often arranged between the coil and a workpiece, a magnetic field generated by the coil is concentrated at the axis position through the magnetic collector, the working coil can generate a magnetic field after being electrified, and the magnetic field acts on the workpiece; still include an outer cover section of thick bamboo, loose wheel, supporting disk, magnetism collector and work coil are installed on two supporting disks of co-altitude not, and the supporting disk is located an outer cover section of thick bamboo, and its external diameter is less than an outer cover section of thick bamboo's internal diameter, an outer cover section of thick bamboo is magnetic screen material, reduces the influence of the background field that exists in the external environment to work coil magnetic field, the loose wheel is located an outer cover section of thick bamboo's bottom surface for an outer cover section of thick bamboo can slide on the work piece, is convenient for find the processing position.

Furthermore, the outer cover cylinder is composed of a top plate and a cylinder wall, the cylinder wall is a section of circular tube, the top surface of the cylinder wall is sealed through the top plate, the bottom of the cylinder wall is open, and the top plate is made of transparent materials.

Furthermore, the cylinder wall is of a double-layer structure, the hollow part in the cylinder wall is provided with an interlayer, the interlayer is a circular tube coaxial with the inner wall of the cylinder wall, and the interlayer divides the space in the cylinder wall into an inward part and an outward part.

Further, the movable pulley sets up in the bottom of dustcoat section of thick bamboo, evenly distributed is at the bottom surface of section of thick bamboo wall, the movable pulley includes: the bottom barrel is fixed in a space with the barrel wall facing outwards and located at the bottom of the space, the bottom surface of the bottom barrel and the bottom surface of the barrel wall are located on the same horizontal plane, the bottom barrel is a barrel with an unsealed bottom surface, the spring is arranged in the bottom barrel, one end of the spring is fixed on the top surface of the inner side of the bottom barrel, the other end of the spring is connected with the mounting box capable of moving in the bottom barrel, a downward force is applied to the mounting box through the spring to push the mounting box outwards, the mounting box is a cylinder with an outer diameter smaller than the inner diameter of the bottom barrel, the top surface of the mounting box is connected with the spring, the ball is placed in the mounting box, the height of the mounting box is smaller than the radius of the ball, and the ball extends outwards from an opening formed in the bottom surface of the mounting box.

Furthermore, an outer coil is arranged in an outward hollow part of the cylinder wall, is wound on the interlayer and generates magnetism after being electrified, so that the mounting box moves upwards, and the ball is retracted into the cylinder wall.

Further, the support tray includes: the bearing disc comprises a disc surface, a connecting rod, a bolt and a sliding block, wherein the disc surface is a disc with the area larger than that of a coil, the edge of the disc surface is connected with the sliding block in the cylinder wall through the connecting rod, the sliding block is located on the inward part in the cylinder wall, the bolt is vertically connected to the top surface of the sliding block, the bolt penetrates through a threaded hole preset in the top surface of the cylinder wall, and the top surface of the bolt is located on the outside, so that the height of the bearing disc is changed by rotating the bolt.

Furthermore, the connecting rod and the disk surface are positioned on the same horizontal plane and are superposed with a radioactive ray at the center of the disk surface.

Further, the section of thick bamboo wall inboard is provided with vertical recess, and the connecting rod passes this recess and is connected with the sliding block in the section of thick bamboo wall, and the width of recess is less than the width of sliding block.

The present invention has at least the following advantageous effects

(1) With coil, magnetism collector integration in the outer cover section of thick bamboo, before the use direct movement outer cover section of thick bamboo can, and no longer need carry out the work piece installation before the welding, it is more convenient to use, and the bottom of an outer cover section of thick bamboo still is provided with the loose wheel moreover, makes an outer cover section of thick bamboo can remove on the work piece, uses more in a flexible way.

(2) The outer cover barrel is provided with an outer coil, the movable wheel can be attracted upwards after the outer coil is electrified and does not move any more, and the outer cover barrel can be firmly adsorbed at a welding position when a magnetic conductive material is welded, so that the accuracy of the welding position is guaranteed.

(3) Magnetic collector and coil are installed on the supporting disk, support through the supporting disk to become a whole with the outer cover section of thick bamboo connection, still be provided with spacing post on the supporting disk that is provided with the coil moreover, the coil winding is fixed through spacing post after the supporting disk.

(4) The height of the supporting disc in the outer cover cylinder is adjustable, so that the distance among the workpiece, the magnetic collector and the coil is adjusted according to different processes, and the welding energy is adjusted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 schematically illustrates a structural schematic of the present invention;

FIG. 2 schematically illustrates a use state diagram of the present invention;

FIG. 3 schematically shows a schematic view of the structure of portion A of FIG. 1;

FIG. 4 is a schematic view showing the structure of a support tray according to the present invention;

FIG. 5 is a schematic view of a top view of a support tray according to the present invention;

wherein the figures include the following reference numerals:

1-working coil, 2-substrate, 3-magnetic collector,

4-outer cover cylinder, 41-top plate, 42-handle, 43-cylinder wall, 44-interlayer, 5-outer coil;

6-movable wheel, 61-bottom cylinder, 62-spring, 63-ball, 64-mounting box and 65-limiting block;

71-disk surface, 72-connecting rod, 73-sliding block, 74-bolt, 75-rotating wheel and 8-limiting column.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure; unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application; as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …, above," "overlying" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures; it will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

Examples

A plate welding process for electronic packaging comprises material preparation, tooling equipment, alignment, welding and post-welding treatment, wherein the welding is electromagnetic pulse welding, a background field around a substrate to be welded is shielded or weakened before the welding, a magnetic shielding material is arranged on the outer side of a workpiece to reduce the influence of the background field on a processing part, and then electromagnetic pulse welding equipment is placed in the electromagnetic pulse welding process for welding; this ensures that the background field is less affected during actual use.

As shown in fig. 1, an electromagnetic pulse welding apparatus includes: the route that power, switch, electric capacity, work coil 1 are constituteed, and the coil is close to the position of waiting to weld, often still is provided with magnetic collector 3 between coil and work piece, concentrates the magnetic field that produces the coil at the axle center position through magnetic collector 3, and work coil 1 can produce the magnetic field after the circular telegram, and the magnetic field is used in the work piece, still includes: outer cover section of thick bamboo 4, loose wheel 6, supporting disk, magnetism collector 3 and work coil 1 are installed on two supporting disks of co-altitude not, and the supporting disk is arranged in outer cover section of thick bamboo 4 to can be in outer cover section of thick bamboo 4 along its axis up-and-down motion, outer cover section of thick bamboo 4 is magnetic screen material, can weaken or even completely cut off external magnetic field, reduces the influence of the background field that exists in the external environment to work coil 1 magnetic field, loose wheel 6 is located the bottom surface of outer cover section of thick bamboo 4 for outer cover section of thick bamboo 4 can slide on the work piece, is convenient for find the processing position.

As shown in fig. 2, the outer cover cylinder 4 includes: the coil processing device comprises a top plate 41, a cylinder wall 43 and an interlayer 44, wherein the outer cover cylinder 4 is a section of circular tube, the top surface of the outer cover cylinder 4 is sealed by the detachably connected top plate 41, the bottom of the outer cover cylinder 4 is open, the top plate 41 is made of transparent materials, the state of a coil can be observed through the top plate 41, meanwhile, the processing position can be determined through a through hole in the middle of the coil, the accuracy of the position is guaranteed, a handle 42 is further arranged on the top plate 41, the outer cover cylinder 4 can be moved by holding the handle 42 when the coil processing device is used, the side wall of the outer cover cylinder 4 is called as the cylinder wall 43, the cylinder wall 43 is of a double-layer structure, an annular hollow part is formed inside the cylinder wall 43, the interlayer 44 is further arranged in the hollow part, the interlayer 44 is a circular tube coaxial with the inner wall of the cylinder wall 43, and the interlayer 44 is located in the annular hollow part of the cylinder wall and divides the annular hollow part of the cylinder wall 43 into an inward part and an outward part.

The movable wheels 6 are arranged at the bottom of the outer cover cylinder 4 and are uniformly distributed on the bottom surface of the cylinder wall 43, so that the outer cover cylinder 4 can move on a workpiece, as shown in fig. 3, the movable wheels 6 comprise: a bottom cylinder 61, a spring 62, a ball 63, and a mounting box 64, wherein the bottom cylinder 61 is fixed in the space outward from the cylinder wall 43 and is located at the bottom of the space, the bottom surface of the bottom cylinder 61 and the bottom surface of the cylinder wall 43 are located at the same horizontal plane, the bottom cylinder 61 is a cylinder with an unclosed bottom surface, the bottom cylinder 61 is uniformly arranged in the outward part of the cylinder wall 43, the spring 62 is arranged in the bottom cylinder 61, one end of the spring 62 is fixed on the top surface of the inner side of the bottom cylinder 61, the other end of the spring 62 is connected with the mounting box 64 capable of moving in the bottom cylinder 61, a downward force is applied to the mounting box 64 through the spring 62 to push the mounting box 64 outward, the mounting box 64 is a cylinder with an outer diameter smaller than the inner diameter of the bottom cylinder 61, the top surface of the mounting box 64 is connected with the spring 62, the ball 63 is arranged in the mounting box 64, the height of the mounting box 64 is smaller than the radius of the ball 63, the ball 63 extends outward from the opening arranged at the bottom surface of the mounting box 64, when the outer cover barrel 4 is pushed, the ball 63 rotates in the mounting box 64, compared with the traditional rotating wheel which can only rotate in one direction, the rotating direction of the ball 63 is not limited, and therefore, the degree of freedom is higher.

It should be noted that: the bottom surface of the bottom box is provided with a limiting block 65, so that the spring 62 is prevented from pushing the mounting box 64 out of the outer cylinder.

As shown in fig. 1, the outer coil 5 is disposed in the hollow portion of the cylinder wall 43 facing outward, the outer coil 5 is wound on the partition 44, and generates magnetism after being energized, because the bottom cylinder 61, the balls 63, and the mounting box 64 of the movable wheel 6 are made of magnetic conductive materials, the energized outer coil 5 attracts these elements, so that the mounting box 64 moves upward, the spring 62 is compressed, the balls 63 are also received in the cylinder wall 43, thereby avoiding the position movement during the welding process, if the workpiece is made of magnetic conductive materials, the magnetic field of the outer coil 5 can further attract the bottom cylinder 61 to the workpiece, and further keeping stability, but because the cylinder wall 43 and the partition 44 are made of magnetic shielding materials, the wall thickness of the bottom cylinder 61 is greater than that of the cylinder wall 43, so as to ensure the attracting effect.

As shown in fig. 4, the support tray includes: the coil comprises a disk surface 71, a connecting rod 72, a bolt 74 and a sliding block 73, wherein the disk surface 71 is a disk with an area larger than that of a coil, the edge of the disk surface 71 is provided with the connecting rod 72, the connecting rod 72 and the disk surface 71 are positioned on the same horizontal plane and coincide with a radial line of the circle center of the disk surface 71, the other end of the connecting rod 72 is connected with the sliding block 73 in the cylinder wall 43, the sliding block 73 is a part which is positioned in the inner part of the cylinder wall 43 and faces inwards, the inner side of the cylinder wall 43 is provided with a vertical groove, the width of the groove is smaller than that of the sliding block 73, the connecting rod 72 penetrates through the groove to be connected with the sliding block 73 and can move in the direction of the groove, the bolt 74 is vertically connected with the top surface of the sliding block 73, the bolt 74 penetrates through a preset threaded hole on the top surface of the cylinder wall 43 to enable the top surface of the bolt 74 to be positioned outside, the threaded hole is matched with the external thread of the bolt 74, and the part, connected with the sliding block 73, is provided with a bearing, the sliding block 73 does not rotate along with the rotation of the bolt 74, so the position of the sliding block 73 can be adjusted by rotating the bolt 74, and when the magnetic flux collecting device is used, the position of the supporting disc in the outer cover cylinder 4 can be adjusted by adjusting the bolt 74 of the same supporting disc, and further, the distance between the workpiece, the magnetic collector 3 and the coil can be adjusted.

Further, as shown in fig. 5, a surface of the slide block 73 facing the inner side of the cylinder wall 43 and the partition 44 is provided with a runner 75, so that the slide block 73 moves more smoothly in the cylinder wall 43.

Further, as shown in fig. 5, the support disc for placing the coil in the support disc is further provided with the limiting columns 8, the limiting columns 8 are uniformly distributed on the disc surface 71 in a concentric circle manner, the coil can be wound on the limiting columns 8 according to the process requirements, and the winding manner is more flexible due to gaps among the limiting columns 8; on the other hand, the restraining posts 8 are also able to withstand the outwardly expanding electromagnetic forces to which the coil is subjected in use.

When the electromagnetic pulse welding equipment in the embodiment is used in the process, the step of weakening the background field before welding can be further saved, and the outer cover cylinder 4 with the magnetic shielding effect is directly integrated with the working coil 1 and the magnetic collector 3 and is directly welded, so that the electromagnetic pulse welding equipment is more flexible to use.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic packaging plate welding process is characterized in that: the method comprises the following steps: the method comprises the steps of material preparation, tooling equipment, alignment, welding and post-welding treatment, wherein the welding is electromagnetic pulse welding, and the background field around a substrate to be welded is shielded or weakened before welding, so that the interference to the magnetic field of a working coil is reduced.

2. The electronic packaging board welding process according to claim 1, wherein: before the welding step, magnetic shielding materials are arranged on the outer side of the workpiece to enclose the welding position, so that the influence of a background field on a processing part is reduced, and then electromagnetic pulse welding equipment is put into the welding step for welding.

3. An electromagnetic pulse welding apparatus comprising: the route that power, switch, electric capacity, work coil are constituteed, and the coil is close to the position of waiting to weld, often still is provided with magnetic collector between coil and work piece, concentrates the magnetic field that produces the coil at the axle center position through magnetic collector, and work coil can produce magnetic field after the circular telegram, and magnetic field is used in its characterized in that on the work piece: still include an outer cover section of thick bamboo, loose wheel, supporting disk, magnetism collector and work coil are installed on two supporting disks of co-altitude not, and the supporting disk is located an outer cover section of thick bamboo, and its external diameter is less than an outer cover section of thick bamboo's internal diameter, an outer cover section of thick bamboo is magnetic screen material, reduces the influence of the background field that exists in the external environment to work coil magnetic field, the loose wheel is located an outer cover section of thick bamboo's bottom surface for an outer cover section of thick bamboo can slide on the work piece, is convenient for find the processing position.

4. An electromagnetic pulse welding apparatus as defined in claim 3, wherein: the outer cover cylinder is composed of a top plate and a cylinder wall, the cylinder wall is a section of circular tube, the top surface of the cylinder wall is sealed through the top plate, the bottom of the cylinder wall is open, and the top plate is made of transparent materials.

5. An electromagnetic pulse welding apparatus as defined in claim 4, wherein: the cylinder wall is of a double-layer structure, the hollow part in the cylinder wall is provided with an interlayer, the interlayer is a round pipe coaxial with the inner wall of the cylinder wall, and the interlayer divides the space in the cylinder wall into an inward part and an outward part.

6. An electromagnetic pulse welding apparatus as defined in claim 3, wherein: the movable wheel sets up in the bottom of a housing section of thick bamboo, evenly distributed is at the bottom surface of section of thick bamboo wall, the movable wheel includes: the bottom barrel is fixed in a space with the barrel wall facing outwards and located at the bottom of the space, the bottom surface of the bottom barrel and the bottom surface of the barrel wall are located on the same horizontal plane, the bottom barrel is a barrel with an unsealed bottom surface, the spring is arranged in the bottom barrel, one end of the spring is fixed on the top surface of the inner side of the bottom barrel, the other end of the spring is connected with the mounting box capable of moving in the bottom barrel, a downward force is applied to the mounting box through the spring to push the mounting box outwards, the mounting box is a cylinder with an outer diameter smaller than the inner diameter of the bottom barrel, the top surface of the mounting box is connected with the spring, the ball is placed in the mounting box, the height of the mounting box is smaller than the radius of the ball, and the ball extends outwards from an opening formed in the bottom surface of the mounting box.

7. An electromagnetic pulse welding apparatus as defined in claim 4, wherein: an outer coil is arranged in an outward hollow part of the cylinder wall and wound on the interlayer, and magnetism is generated after the outer coil is electrified, so that the mounting box moves upwards, and the ball is drawn into the cylinder wall.

8. An electromagnetic pulse welding apparatus as defined in claim 3, wherein: the support tray includes: the bearing disc comprises a disc surface, a connecting rod, a bolt and a sliding block, wherein the disc surface is a disc with the area larger than that of a coil, the edge of the disc surface is connected with the sliding block in the cylinder wall through the connecting rod, the sliding block is located on the inward part in the cylinder wall, the bolt is vertically connected to the top surface of the sliding block, the bolt penetrates through a threaded hole preset in the top surface of the cylinder wall, and the top surface of the bolt is located on the outside, so that the height of the bearing disc is changed by rotating the bolt.

9. An electromagnetic pulse welding apparatus as defined in claim 8, wherein: the connecting rod and the disk surface are positioned on the same horizontal plane and are superposed with a radioactive ray at the center of the disk surface.

10. An electromagnetic pulse welding apparatus as defined in claim 8, wherein: the section of thick bamboo wall inboard is provided with vertical recess, and the connecting rod passes this recess and is connected with the sliding block in the section of thick bamboo wall, and the width of recess is less than the width of sliding block.