CN111015054A

CN111015054A - Anti-tilting device for gold wire pressure welding fixing clamp in micro-assembly process

Info

Publication number: CN111015054A
Application number: CN201911334831.1A
Authority: CN
Inventors: 张广涵; 李洪玉; 李冰; 胡伟; 欧熠
Original assignee: CETC 44 Research Institute
Current assignee: CETC 44 Research Institute
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-04-17
Anticipated expiration: 2039-12-23
Also published as: CN111015054B

Abstract

The application relates to the field of tools of a micro-assembly process, in particular to an anti-tilting device of a gold wire pressure welding fixing clamp in the micro-assembly process; the anti-tilting device comprises a sliding block and a plane sliding rail which are matched; the plane slide rail is provided with a large double-layer groove and a small double-layer groove, and the large groove is positioned right above the small groove; a plurality of first threaded holes are formed in the sliding rail, and the positions of the first threaded holes correspond to the positions of the double-layer grooves; when the screw is used, the sliding block is arranged above the plane sliding rail, the screw penetrates into the first threaded hole from the small groove, and the head of the screw is clamped on the upper surface of the bottom of the large groove; the device can replace the original slide block and slide rail in the gold wire pressure welding fixing clamp, can ensure that the slide block freely slides, and simultaneously, the bottom surface of the head of the screw clamps the upper surface in the U-shaped groove of the slide block, thereby limiting the tilting of the slide block.

Description

Anti-tilting device for gold wire pressure welding fixing clamp in micro-assembly process

Technical Field

The application relates to the field of tools of micro-assembly processes, in particular to a device for preventing a gold wire pressure welding fixing clamp from tilting in the micro-assembly process.

Background

The gold wire bonding process in the micro-assembly process requires a device to fix the shell so as to prevent the shell from shaking in the bonding process. Depending on the shape and size of the different housings, the mounting clips need to be specially designed to match the mounting requirements. To the ceramic package of the most conventional DIP encapsulation or SOP encapsulation, mounting fixture generally adopts the simplest both sides extrusion formula fixed, and on ceramic package one side contacted a fixed dog promptly, the opposite side was extruded fixedly gradually by a slider, and the bottom is forced on the base of adaptation simultaneously to form ceramic package's fixed. Because the chopper vibrates at high frequency during gold wire pressure welding, in order to ensure the quality of the pressure welding point, the shell must be fixed very firmly, and the extrusion force of the sliding block on the ceramic shell is extremely high.

In practical operation, if the ceramic shell has a large size (for example, greater than 15mm × 15mm × 2.5mm), when the slider applies a very large force to the shell, a slight upwarp may occur, and at the same time, the ceramic shell is driven to slightly upwarp by the slider side, so that the shell bottom side is suspended, and thus the force point is lost, and the pressure welding quality is affected.

Disclosure of Invention

The application aims at solving the problem that a sliding block of a ceramic shell fixing clamp is warped in a gold wire pressure welding process. A novel anti-tilting sliding device is designed aiming at the problem of slider tilting, the novel anti-tilting sliding device can replace the original slider and the original slide rail in a clamp to be used, and the anti-tilting device for the gold wire pressure welding fixing clamp in the micro-assembly process is specifically provided.

An anti-tilting device comprises a sliding block and a plane sliding rail which are matched with each other; the plane slide rail is provided with a large double-layer groove and a small double-layer groove, and the large groove is positioned right above the small groove; a plurality of first threaded holes are formed in the sliding rail, and the positions of the first threaded holes correspond to the positions of the double-layer grooves; when the screw driver is used, the sliding block is arranged above the plane sliding rail, the screw penetrates into the first threaded hole from the small groove, and the head of the screw is clamped on the upper surface of the bottom of the large groove.

Furthermore, the number of the double-layer grooves is one or even.

Preferably, two symmetrically distributed double-layer grooves are selected.

Furthermore, the small groove in the double-layer groove is a U-shaped groove, and the large groove is a U-shaped groove or a rectangular groove.

Further, the surface of the small groove is a smooth surface or a thread shape matched with the screw.

Preferably, the screw is a cylindrical head screw and can be clamped at the bottom of the large groove.

Furthermore, the plane slide rail is also provided with a mounting hole matched with the gold wire pressure welding fixing clamp.

Based on the same conception of the invention, the invention also provides a gold wire pressure welding fixing clamp which comprises the anti-tilting device, a base, a push rod and a push rod limiting block; a third threaded hole matched with the first mounting hole of the planar slide rail and a second mounting hole matched with the push rod limiting block are formed in the base; the middle of the push rod is provided with a movable thin shaft which penetrates through a push rod limiting block, and the two ends of the thin shaft close to the push rod limiting block are provided with thin cylinders for limiting the push rod to move back and forth; the thin shaft is provided with threads and is correspondingly screwed into a second threaded hole which transversely penetrates through the sliding block; when the anti-tilting sliding block is used, the push rod is rotated, the push rod is clamped by the push rod limiting block and rotates in situ, the movable thin shaft rotates, the thin shaft thread penetrating through the sliding block brakes the sliding block to move slowly, and the anti-tilting screw in the sliding block is clamped on the upper surface of the bottom of the large groove of the sliding block to prevent tilting.

The invention has the beneficial effects that:

1. the invention can completely prevent the tilting of the sliding block in the fixing process;

2. the invention has simple processing and can be quickly manufactured.

3. The matched parts of the invention can use the existing cylindrical head screw without using other parts for limiting.

4. The invention does not occupy any extra space and can be directly installed in place.

5. The invention is suitable for preventing the tilting of the clamp with any size in the metal wire seam welding tool.

Drawings

FIG. 1 is a schematic view of a slider in the anti-cocking apparatus of the present invention;

FIG. 2 is a schematic view of a planar slide rail in the tilting prevention device according to an embodiment of the present invention;

FIG. 3 is a schematic view of a planar slide rail in the anti-tilting device according to another embodiment of the present invention;

FIG. 4 is a view of the anti-cocking device of the present invention;

FIG. 5 is a view of a gold wire bonding fixture according to the present invention;

in the figure: 1. the anti-tilting device comprises a 2, a slider, 3, a large groove, 4, a small groove, 5, a plane slide rail, 6, a first threaded hole, 7, a screw, 10, a base, 100, a second threaded hole, 101, a first mounting hole, 11, a push rod, 110, a thin shaft, 12, a push rod limiting block, 120, a second mounting hole, 121 and a thin cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly and completely apparent, the technical solutions in the embodiments of the present invention are described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

As shown in fig. 1, this embodiment shows an implementation manner of the slider, the slider 2 includes two double-layer grooves, each double-layer groove includes two larger grooves and two smaller grooves, the large groove 3 is communicated with the small groove 4, and the large groove 3 is located above the small groove 4.

In this embodiment, there are two double-layer slots, which are symmetrically distributed.

In other embodiments, there may be only 1 double-layer slot, but the single double-layer slot is preferably located in the middle of the slider in order to keep the slider structure balanced.

The number of double-layer grooves may be an even number, and similarly, the even number of double-layer grooves are preferably symmetrically distributed.

As shown in fig. 2, in this embodiment, a mode of implementing a planar sliding rail is provided, wherein blocking pieces are arranged on two sides of the planar sliding rail 5 upwards, on one hand, the blocking pieces are used for supporting a sliding block, on the other hand, the blocking pieces are used for limiting a relative sliding position of the sliding block, and at least one first threaded hole 6 is arranged on the planar sliding rail; the relative distance between the sliding block and the plane sliding rail can be fixed through the first threaded hole 6, and the sliding block can be prevented from tilting.

As shown in fig. 3, this embodiment is an implementation manner of a planar slide rail in a gold wire pressure welding fixture, two sides of the planar slide rail 5 are provided with a blocking piece upwards, on one hand, the blocking piece is used for supporting a slide block, on the other hand, the blocking piece is used for limiting a relative sliding position of the slide block, and at least one first threaded hole 6 is provided on the planar slide rail; the relative distance between the sliding block and the plane sliding rail can be fixed through the first threaded hole 6, so that the sliding block can be prevented from tilting; in addition, a first mounting hole 101 matched with the fixing clamp is further formed in the baffle; the plane slide rail 5 is connected with a gold wire pressure welding fixing clamp through a first mounting hole 101.

As shown in fig. 4, this embodiment provides an implementation manner of a warpage prevention device, which is mainly obtained by assembling a sliding block and a planar sliding rail, where a screw 7 is installed on the warpage prevention device 1, the screw 7 extends into a first threaded hole 6 in the sliding block 2, and when the sliding block 5 moves, the screw also moves in the large groove 3 and the small groove 4 in the same direction, and due to the limiting effect of the large groove 3 and the small groove 4, the moving position of the sliding block is also limited, so as to achieve the warpage prevention effect.

As shown in fig. 5, the present embodiment provides a gold wire bonding fixture, which may include any one of the above-mentioned tilting prevention devices 1 (the circled portion in fig. 5 is a tilting prevention device), and further includes a base 10, a push rod 11 and a push rod stopper 12; the base 10 is provided with a third threaded hole (the position of the third threaded hole is overlapped with the position of the first mounting hole 101, so that the third threaded hole is inconvenient to be shown in the figure) matched with the first mounting hole 101 of the plane slide rail, and the third threaded hole is positioned right in front of the placing position of a device to be fixed and is preferably fixed by a flat head screw, so that the sliding of the sliding block on the plane slide rail is not influenced; a second mounting hole 120 of the push rod limiting block is also arranged; a thin shaft 110 is arranged in the middle of the push rod 11 and penetrates through the push rod limiting block, and the positions, close to the push rod limiting block, of the two ends of the thin shaft are provided with large-size thin cylinders 121, so that the push rod is clamped by the push rod limiting block 12 in the front-back direction and can only rotate. The push rod and the push rod limiting block are installed at the position close to the plane slide rail together, and a thin shaft 110 of the push rod is provided with threads and is correspondingly screwed into a second threaded hole 100 which transversely penetrates through the sliding block; when the anti-tilting sliding block is used, the push rod is rotated, the position of the push rod clamped by the push rod limiting block rotates in situ, the thin shaft rotates, the sliding block is braked by the threads of the sliding block to move slowly, and the anti-tilting screws in the sliding block are clamped on the upper surface of the bottom of the large groove of the sliding block to prevent tilting.

It is understood that the gold wire bonding fixture of the present invention is not limited to the structure provided in the above embodiments, and the invention shall fall within the protection scope of the present invention as long as the anti-tilting device of the present invention is included. The skilled person can process according to the actual size of the fixture to obtain the corresponding gold wire bonding fixture.

In a specific embodiment, the application designs a novel anti-warping sliding device aiming at the problem of warping of the sliding block, and the novel anti-warping sliding device can replace the original sliding block and the original sliding rail in the clamp to be used. The anti-tilting sliding device comprises a newly designed sliding block and a plane sliding rail. Two double-layer U-shaped grooves which are larger and smaller along the sliding direction are arranged above the sliding block, a plurality of threaded holes are formed in the corresponding positions of the plane sliding rail, and the size of each threaded hole corresponds to that of each double-layer U-shaped groove. The plane slide rail is simultaneously provided with a mounting hole corresponding to the gold wire pressure welding fixing clamp and can be mounted on the corresponding clamp. When the sliding block is laid on a new sliding rail, the cylindrical head screw with the corresponding size is screwed, the slightly tightened state is screwed, the sliding block can be guaranteed to slide freely, and meanwhile, the upper surface in the smaller U-shaped groove in the sliding block is clamped by the bottom surface of the head of the screw, so that the tilting of the sliding block is limited.

It can be understood that the main points of the invention are: an anti-tilting device capable of replacing a sliding part in a gold wire pressure welding fixing clamp in situ. The device comprises slider and plane slide rail, and the core of slider lies in two double-deck grooves, and the core of plane slide rail lies in the screw hole that a plurality of correspond double-deck trench positions and the mountable mounting hole that corresponds on the gold wire pressure welding mounting fixture, and the screw that corresponds double-deck groove is spacing in the plane slide rail can be screwed into to whole device with ordinary cylinder head screw to reach and prevent the effect of perk. The anti-tilting device is specially designed based on a micro-assembly process gold wire bonding environment, and the design key point is an anti-tilting mode which can be used in a gold wire bonding clamp, and is not limited to a certain specific shape structure or size.

The above-mentioned embodiments, which further illustrate the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned embodiments are only preferred embodiments of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-tilting device comprises a sliding block and a plane sliding rail which are matched with each other; the plane sliding rail is characterized in that a large double-layer groove and a small double-layer groove are arranged on the plane sliding rail, and the large groove is positioned right above the small groove; a plurality of first threaded holes are formed in the sliding rail, and the positions of the first threaded holes correspond to the positions of the double-layer grooves; when the screw driver is used, the sliding block is arranged above the plane sliding rail, the screw penetrates into the first threaded hole from the small groove, and the head of the screw is clamped on the upper surface of the bottom of the large groove.

2. The anti-cocking device of claim 1, wherein the number of double layer slots is one or an even number.

3. The anti-tilting device according to claim 1, wherein the small groove in the double-layer groove is a U-shaped groove, and the large groove is a U-shaped groove or a rectangular groove.

4. The tilting prevention device according to claim 1, wherein the surface of the small groove is a smooth surface or a thread shape adapted to the screw.

5. The tilting prevention device according to any one of claims 1 to 4, wherein the planar slide rail is further provided with a first mounting hole matched with the gold wire pressure welding fixing clamp; and a second threaded hole is formed in the sliding block.

6. A wire bonding fixture comprising the anti-cocking device of claim 5; the gold wire pressure welding fixing clamp is characterized by further comprising a base, a push rod and a push rod limiting block; a third threaded hole matched with the first mounting hole of the planar slide rail and a second mounting hole matched with the push rod limiting block are formed in the base; the middle of the push rod is provided with a movable thin shaft which penetrates through a push rod limiting block, and the two ends of the thin shaft close to the push rod limiting block are provided with thin cylinders for limiting the push rod to move back and forth; the thin shaft is provided with threads and is correspondingly screwed into a second threaded hole which transversely penetrates through the sliding block; when the anti-tilting sliding block is used, the push rod is rotated, the push rod is clamped by the push rod limiting block and rotates in situ, the movable thin shaft rotates, the thin shaft thread penetrating through the sliding block brakes the sliding block to move slowly, and the anti-tilting screw in the sliding block is clamped on the upper surface of the bottom of the large groove of the sliding block to prevent tilting.

7. The gold wire bonding fixture as claimed in claim 6, wherein the mounting hole and the second threaded hole are fixed by a flat head screw.