Flexible device for adapting laser welding nozzles to different sizes of tin balls

Abstract

The present application relates to the field of welding equipment, specifically to a flexible device for adapting laser welding nozzles to different sizes of tin balls, comprising: a nozzle cover with a hollow structure; a fixed sleeve vertically fixed in the nozzle cover; a lifting sleeve set in the fixed sleeve and driven by a lifting assembly to lift relative to the fixed sleeve; a plurality of nozzle pieces arranged around the outer peripheral wall of the fixed sleeve, with the middle part hinged to the fixed sleeve and the bottom part having an inclined section extending towards the center line of the fixed sleeve, the bottom part of the lifting sleeve abutting against the inner wall of the plurality of inclined sections; the lifting assembly drives the lifting sleeve to lower, and the bottom ends of the plurality of inclined sections expand outward due to the rotation of the nozzle pieces to adapt to different sizes of tin balls; the lifting sleeve is lifted by rotating the rotating sleeve, and the lifting of the lifting sleeve is converted into the overturning of the nozzle pieces around their hinged parts, and finally the synchronous gathering or expansion of the spacing between the bottom parts of the three inclined sections is realized, that is, the stepless adjustment of the spacing between the bottom parts of the inclined sections is realized, so that the bearing or guiding of tin balls of any size is realized, which facilitates the subsequent melting and welding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of welding equipment, in particular to a flexible device for adapting different particle size solder ball laser welding nozzle. BACKGROUND

[0002] The solder ball spot welding device realizes high-precision welding in the process of chip packaging and die packaging, ensures good electrical connection and mechanical stability between the chip and the substrate; specifically, the solder ball is supplied to the nozzle, the solder ball is melted by laser heating, and is spot welded at the position to be welded.

[0003] However, when using the solder ball spot welding device to perform laser solder ball welding on part of the workpiece, multiple particle sizes of solder balls are often needed to be welded on the same workpiece, so the worker needs to frequently replace the solder melting nozzle on the solder ball welding equipment to enable the solder ball welding equipment to use multiple specifications of solder balls to perform welding on the workpiece.

[0004] In the solder ball welding equipment with publication number CN118204586A, different solder melting nozzles are driven by a rotating rotating disc to communicate with corresponding material guiding sub-passages; however, in the above-mentioned scheme, different particle sizes of solder balls need to be put into different material guiding sub-passages in advance; in addition, for the solder melting nozzles on the rotating disc, the relative positions must be provided with a clearance to ensure that the laser of the laser assembly passes through, which limits the number of solder melting nozzles and can only meet the melting and welding of some particle sizes of solder balls.

[0005] In summary, how to realize the bearing of solder balls of different particle sizes and facilitate the subsequent welding of solder balls has become a problem that researchers in the field urgently need to solve. SUMMARY

[0006] The technical problem to be solved by the present application is how to realize the bearing of solder balls of different particle sizes and facilitate the subsequent welding of solder balls.

[0007] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0008] The application is a flexible device for adapting laser welding nozzle to different tin ball sizes, comprising: a nozzle cover with a hollow structure and an opening at the bottom; a fixed sleeve vertically fixed in the nozzle cover; a lifting sleeve sleeved in the fixed sleeve and driven by a lifting assembly to lift relative to the fixed sleeve; a plurality of nozzle pieces arranged around the outer peripheral wall of the fixed sleeve, with the middle part hinged to the fixed sleeve and the bottom part having an inclined section extending towards the center line of the fixed sleeve, the bottom of the lifting sleeve abutting against the inner wall of the plurality of inclined sections; the lifting assembly drives the lifting sleeve to descend, and the bottom end of the plurality of inclined sections is expanded outward due to the rotation of the nozzle piece to support tin balls of different sizes at the bottom end of the inclined section or guide the tin balls through the gap formed by the bottom end of the inclined section to the defined area on the workpiece to be welded.

[0009] Further, an elastic piece is arranged between the top of the nozzle piece and the outer peripheral wall of the fixed sleeve.

[0010] Further, a connecting ring is arranged in the nozzle cover to fix the fixed sleeve in the nozzle cover.

[0011] Further, the inclined section has an arc-shaped structure with the surrounding part extending outward on both sides, and the surrounding part gradually decreases in cross-sectional area from top to bottom, and the surrounding gap between the adjacent two surrounding parts blocks the tin balls.

[0012] Further, the lifting assembly comprises: a rotating sleeve rotationally arranged outside the fixed sleeve, with a diagonal waist hole formed in the peripheral wall; a guide pin fixed on the lifting sleeve and passing through the vertical waist hole formed in the fixed sleeve and located in the diagonal waist hole.

[0013] Further, the lifting assembly further comprises: a connecting screw passing through the guide window formed in the nozzle cover and connected with the connecting hole radially formed in the rotating sleeve; rotating the connecting screw to abut against the fixed sleeve with the end part to realize the locking of the rotating sleeve relative to the fixed sleeve after the rotating of the rotating sleeve.

[0014] Further, the peripheral wall of the nozzle cover is provided with a feeding hole; the peripheral wall of the lifting sleeve is provided with a vertical feeding waist hole, and the feeding waist hole is located between the two nozzle pieces; a diagonal communication pipe is connected with the feeding hole at one end and communicated with the feeding waist hole at the other end.

[0015] Further, the bottom end of the lifting sleeve is a closing part with gradually reduced inner diameter, and the bottom of the closing part abuts against the surrounding part of the nozzle piece.

[0016] Further, the outer wall of the fixed sleeve is provided with a snap spring at the upper and lower positions, and the rotating sleeve is axially limited between the two snap springs.

[0017] Further, a guide rod is arranged at one end of the top of the nozzle piece extending towards the fixed sleeve, and the elastic member is sleeved on the guide rod.

[0018] The present application has the following advantages: the present application is a flexible device for adapting to laser welding nozzles of different sizes of tin balls. The rotating sleeve is rotated to be lifted and lowered, the lifting and lowering sleeve is lifted and lowered to turn the nozzle piece around its hinge, and finally the three inclined sections are synchronously gathered or expanded, i.e. the inclined section gap is steplessly adjusted, so that the tin balls of any size can be carried or guided through for subsequent melting and welding. In addition, the tin balls of different sizes can enter the spot welding device through the same feeding hole, the relative position of the laser assembly and the nozzle cover does not change, the tin balls are carried at the bottom of the inclined section and always located below the laser assembly, which is convenient for subsequent welding.

[0019] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application is further described below with reference to the accompanying drawings and examples.

[0021] Figure 1 is a structural schematic diagram of example 1;

[0022] Figure 2 is a sectional view of tin ball support in the inclined section in example 1;

[0023] Figure 3 is a structural schematic diagram of example 1 omitting the nozzle cover;

[0024] Figure 4 is a structural schematic diagram of the nozzle cover in example 1;

[0025] Figure 5 is a structural schematic diagram of the rotating sleeve in example 1;

[0026] Figure 6 is a structural schematic diagram of the fixed sleeve in example 1;

[0027] Figure 7 is a structural schematic diagram of the lifting and lowering sleeve in example 1;

[0028] Figure 8 is a structural schematic diagram of the nozzle piece in example 1;

[0029] Figure 9 is a sectional view of tin ball guiding through the inclined section in example 1;

[0030] Figure 10 is a structural schematic diagram of example 2;

[0031] Figure 11 is a structural schematic diagram of the nozzle piece in Example 2;

[0032] In the figure: 1-nozzle cover, 11-opening, 12-feeding hole, 13-guiding window, 2-fixing sleeve, 21-connecting ring, 22-vertical waist hole, 23-ear, 3-lifting sleeve, 31-feeding waist hole, 32-guiding pin, 33-closing part, 4-rotating sleeve, 41-oblique waist hole, 42-connecting hole, 5-communication pipe, 6-nozzle piece, 61-inclined section, 62-enclosure part, 63-guiding rod, 7-connecting screw, 8-clamp spring, 9-elastic piece, 01-tin ball, 02-workpiece, 100-laser assembly. DETAILED DESCRIPTION

[0033] The application will now be described in further detail with reference to the drawings. These drawings are simplified schematic diagrams which only show the basic structure of the application in a schematic manner, and therefore only show the components relevant to the application, and the directions and references (e.g. up, down, left, right, etc.) can only be used to help describe the features in the drawings. Therefore, the following detailed description is not used in a limiting sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalents. Example 1

[0034] Referring to Figures 1-8 , the embodiment is a flexible device for adapting different particle sizes of tin balls 01 to laser welding nozzles, comprising: a nozzle cover 1 of hollow structure, as shown in detail in Figure 2 , the nozzle cover 1 is provided with a laser assembly 100 at the top, as shown in detail in Figure 4 , the nozzle cover 1 has an opening 11 at the bottom; as shown in detail in Figure 2 , a fixing sleeve 2 is vertically fixed in the nozzle cover 1 through a connecting ring 21, and the fixing sleeve 2 provides a mounting position for the connection of a lifting sleeve 3 and a rotating sleeve 4; the lifting sleeve 3 is sleeved in the fixing sleeve 2 and is driven by a lifting assembly to lift relative to the fixing sleeve 2; a feeding hole 12 is opened on the left side of the nozzle cover 1, one end of a communication pipe 5 is connected with the feeding hole 12, and the other end extends obliquely to the left and down to the feeding waist hole 31 of the lifting sleeve 3; during the lifting process of the lifting sleeve 3, the tin balls 01 can always enter into the lifting sleeve 3 from the feeding hole 12; three nozzle pieces 6 are equidistantly arranged around the outer peripheral wall of the fixing sleeve 2, the middle part of the nozzle piece 6 is hinged with the ear 23 arranged on the outer peripheral wall of the fixing sleeve 2, and the bottom part has an inclined section 61 extending to the center line direction of the fixing sleeve 2, the bottom ends of the three inclined sections 61 are located outside the opening 11, and the bottom of the lifting sleeve 3 abuts against the inner walls of the three inclined sections 61; the function of the inclined section 61 at the bottom of the nozzle piece 6 is to facilitate the contact between the inclined section 61 and the bottom of the lifting sleeve 3 to make the nozzle piece 6 overturn, and to guide the tin balls 01 falling into the inclined section 61 to the bottom ends of the three inclined sections 61;

[0035] As shown in Figure 9 , if the diameter of the gap forming area at the bottom end of the inclined section 61 is greater than the diameter of the solder ball 01, the solder ball 01 is guided into the defined area on the workpiece 02 through the bottom end of the inclined section 61, and the focal point of the laser assembly 100 is located at the solder ball 01 on the workpiece 02, so that the solder ball 01 is melted to realize welding of the workpiece 02;

[0036] As shown in Figure 2 , if the diameter of the gap forming area at the bottom end of the inclined section 61 is less than the diameter of the solder ball 01, the solder ball 01 is supported at the bottom end of the inclined section 61, and the focal point of the laser assembly 100 is located at the solder ball 01 at the bottom end of the inclined section 61, so that the solder ball 01 is melted and dropped on the position to be welded on the workpiece 02;

[0037] In this embodiment, the lifting of the lifting sleeve 3 is converted into the rotation of the three nozzle pieces 6 in the vertical direction, and then the spacing of different inclined sections 61 is adjusted to adapt to solder balls 01 of different particle sizes. Solder balls 01 of different particle sizes can enter the inside of the spot welding device through the same feeding hole 12, and the relative position of the laser assembly 100 and the nozzle cover 1 will not change.

[0038] Referring to Figure 8 , in embodiment 1, when the solder ball 01 falls into the inclined section 61, in order to avoid the solder ball 01 from falling off from the gap between adjacent inclined sections 61, the inclined section 61 is provided with an arc-shaped blocking part 62 extending outward on both sides, and the cross-sectional area of the blocking part 62 gradually decreases from top to bottom, and the blocking gap between the adjacent two blocking parts 62 blocks the solder ball 01;

[0039] The inclined section 61 extends outward to form a blocking part 62, the blocking part 62 is an arc-shaped structure, the cross-sectional area of the blocking part 62 gradually decreases from top to bottom, the solder ball 01 falls into the bottom end of the inclined section 61 and is blocked by the blocking part 62, so that the solder ball 01 cannot fall off from the blocking gap to the outside of the nozzle piece, and the blocking gap is the adjusting gap close to or away from the inclined section 61.

[0040] Referring to Figure 2 , 4 , 5, 6, 7, in order to illustrate the specific structure of the lifting assembly, the lifting assembly includes: a rotating sleeve 4 rotatably arranged outside the fixed sleeve 2, as shown in Figure 5 , a diagonal waist hole 41 is formed through the peripheral wall of the rotating sleeve 4, and the diagonal waist hole 41 has a left-low right-high structure; a guide pin 32 is fixed on the lifting sleeve 3 and penetrates through the vertical waist hole 22 formed in the fixed sleeve 2 and located in the diagonal waist hole 41;

[0041] The guide pin 32 cooperates with the vertical waist hole 22 on the fixed sleeve 2 to realize the lifting movement of the lifting sleeve 3 relative to the fixed sleeve 2; the guide pin 32 is also located in the inclined waist hole 41; the rotating sleeve 4 is rotated, when the guide pin 32 is located at the lower limit position of the inclined waist hole 41, the guide pin 32 is located at the lower limit position of the vertical waist hole 22, at this time the lifting sleeve 3 is at the lower limit position, at this time it can adapt to the largest particle size of the solder ball 01 for welding; when the guide pin 32 is located at the upper limit position of the inclined waist hole 41, the guide pin 32 is located at the upper limit position of the vertical waist hole 22, at this time the lifting sleeve 3 is at the upper limit position, at this time the lifting sleeve 3 does not contact the inclined section 61;

[0042] In summary, by rotating the sleeve 4, the lifting sleeve 3 is lifted, and then the nozzle piece 6 is turned around its hinge, finally the stepless adjustment of the distance between the bottoms of the three inclined sections 61 is realized, so as to realize the welding of the solder ball 01 of any particle size after being carried or guided.

[0043] Referring to Figure 1 , 3 , 5, in order to illustrate the locking of the rotating sleeve 4 after rotation in embodiment 1, the lifting assembly of the present embodiment further comprises: a connecting screw 7 passing through the guide window 13 provided on the nozzle cover 1 and being connected with the connecting hole 42 radially provided on the rotating sleeve 4;

[0044] In the present embodiment, after completing the rotation adjustment of the rotating sleeve 4 relative to the fixed sleeve 2, the connecting screw 7 is rotated, and the end thereof is abutted with the fixed sleeve 2, so as to realize the locking of the rotating sleeve 4 relative to the fixed sleeve 2 after rotation.

[0045] Referring to Figure 2 , 7 , in order to smoothly guide the solder ball 01 of the lifting sleeve to the bottom end of the three inclined ends in embodiment 1, the bottom end of the lifting sleeve 3 of the present embodiment is a converging portion 33 with gradually decreasing inner diameter, and the bottom of the converging portion 33 is abutted with the surrounding portion 62 of the nozzle piece 6;

[0046] In the present embodiment, the bottom end of the converging portion 33 is lower than the top of the surrounding portion 62, so that the solder ball 01 falls from the lifting sleeve 3, is guided by the converging portion 33, and smoothly falls into the space formed by the surrounding portion 62, avoiding the falling of the solder ball 01 outside the nozzle piece 6.

[0047] Referring to Figure 3 , in order to limit the axial movement of the rotating sleeve 4 relative to the fixed sleeve 2 in embodiment 1, the present embodiment is provided with a snap spring 8 at the upper and lower positions of the outer wall of the fixed sleeve 2, and the rotating sleeve 4 is axially limited between the two snap springs 8;

[0048] The rotating sleeve 4 is limited on the fixed sleeve 2 by the two clamps 8, so that the rotating sleeve 4 can only rotate relative to the fixed sleeve 2, and the up-down movement of the rotating sleeve 4 is limited.

[0049] Working principle:

[0050] Firstly, the particle size of the solder ball 01 is determined according to the requirement of the welding point, and the lifting position of the lifting sleeve 3 is adjusted according to the particle size of the solder ball 01; when the lifting sleeve 3 is not in contact with the inclined section 61, the center of gravity of the nozzle piece 6 is at the upper position outside the hinge, at this time the inclined section 61 is gathered to the middle, when the particle size of the solder ball 01 is larger, the lifting sleeve 3 is moved downward, the bottom of the lifting sleeve 3 is in contact with the inclined section 61, the inclined section 61 is expanded outward under the force, the gap at the bottom of the three inclined sections 61 is increased, and the solder ball 01 with a larger particle size or the solder ball 01 with a larger particle size can be guided to pass through the gap at the bottom of the inclined section 61; on the contrary, when the particle size of the solder ball 01 is smaller, the lifting sleeve 3 is moved upward, the contact position of the bottom of the lifting sleeve 3 with the inclined section 61 changes, and the three inclined sections 61 at the bottom are gathered inward under the action of the gravity of the nozzle piece 6 to adapt to the support or guidance of the solder ball 01 with a smaller particle size to pass through;

[0051] Subsequently, the solder ball 01 enters from the feeding hole 12, enters the lifting sleeve 3 through the communication pipe 5 and the feeding waist hole 31, and then the solder ball 01 falls into the support or guidance to pass through the bottom of the inclined section 61 from the lifting sleeve 3;

[0052] Finally, the laser assembly 100 works, and the solder ball 01 supported at the bottom of the three inclined sections 61 or the solder ball 01 placed in the defined area on the workpiece 02 is melted and welded.

[0053] It should be noted that in this embodiment, when the lifting sleeve 3 is not in contact with the inclined section 61, the inclined section 61 is gathered to the middle, and at this time it cannot adapt to the welding of any particle size of the solder ball 01. Embodiment 2

[0054] In embodiment 1, since the three nozzle pieces are close to each other under the action of gravity, the three inclined sections are easily expanded outward under the impact force of the falling solder ball 01, which causes the solder ball 01 to be unable to be stably supported at the inclined section, and the center of gravity of the nozzle piece is required to be designed, that is, the center of gravity of the nozzle piece needs to be at the upper position outside the hinge when the nozzle piece is installed; in order to simplify the design of the nozzle piece and ensure that the solder ball 01 is stably supported at the inclined section, the present application also discloses embodiment 2, which is as follows:

[0055] Referring to Figure 10 , the present embodiment is a flexible laser welding nozzle device for adapting to different particle sizes of solder balls 01, which is substantially the same as embodiment 1, and the only difference is that an elastic piece 9 is arranged between the top of the nozzle piece 6 and the outer peripheral wall of the fixed sleeve 2;

[0056] In the embodiment, the elastic member 9 is arranged to ensure stable bearing or guiding of the inclined section 61 on the solder ball 01. Even if the bottom end of the inclined section 61 is impacted, the stable inclined section 61 can be ensured under the action of the elastic member 9, and the design of the center of gravity of the nozzle member 6 is not required.

[0057] Referring to Figure 11 In the embodiment 2, in order to realize the positioning of the elastic member 9, the top end of the nozzle member 6 is arranged to extend towards the fixed sleeve 2 and is provided with a guide rod 63, and the elastic member 9 is sleeved on the guide rod 63.

[0058] The elastic member 9 is sleeved on the guide rod 63, one end of the elastic member 9 is in contact with the top of the nozzle member 6, and the other end is in contact with the fixed sleeve 2, so as to avoid the distortion of the elastic member 9 when it is compressed.

[0059] Working principle:

[0060] When the lifting sleeve 3 is not in contact with the inclined section 61, the inclined section 61 is gathered to the middle under the action of the elastic member. When the particle size of the solder ball 01 is large, the lifting sleeve 3 is moved downward, the bottom of the lifting sleeve 3 is in contact with the inclined section 61, the inclined section 61 is expanded under the force, the elastic member 9 is compressed, the gap of the bottom end of the three inclined sections 61 is increased, and the solder ball 01 with large particle size can be guided to pass through. Conversely, when the particle size of the solder ball 01 is small, the lifting sleeve 3 is moved upward, the contact position of the bottom of the lifting sleeve 3 with the inclined section 61 is changed, the elastic member 9 is reset and elongated, and the three inclined sections 61 are gathered to the middle to adapt to the solder ball 01 with small particle size.

[0061] Based on the above ideal embodiments according to the application, the above description can be varied and modified by relevant personnel without deviating from the technical idea of the application. The technical scope of the application is not limited by the content of the specification, and must be determined by the scope of the claims.

Claims

1. A flexible device for adapting laser welding nozzles to different sizes of solder balls, characterized in that The utility model relates to a tin ball welding device, including: The bottom of the nozzle cover (1) of hollow structure has an opening (11); The fixed sleeve (2) is vertically fixed in the nozzle cover (1); The lifting sleeve (3) is sleeved in the fixed sleeve (2) and is driven by the lifting assembly to lift relative to the fixed sleeve (2); A plurality of nozzle pieces (6) are arranged around the outer peripheral wall of the fixed sleeve (2), the middle part is hinged to the fixed sleeve (2), the bottom has an inclined section (61) extending to the center line direction of the fixed sleeve (2), the bottom of the lifting sleeve (3) abuts against the inner wall of the plurality of inclined sections (61); The lifting assembly drives the lifting sleeve (3) to descend, the bottom end of the plurality of inclined sections (61) is expanded outward due to the rotation of the nozzle piece (6), the tin ball (01) of different particle sizes is supported at the bottom end of the inclined section (61) or is guided to the defined area of the workpiece (02) to be welded through the gap formed by the bottom end of the inclined section (61).

2. The flexible device for adapting different sizes of solder ball laser welding nozzle according to claim 1, wherein, The top of the nozzle piece (6) is provided with an elastic element (9) between the outer peripheral wall of the fixed sleeve (2).

3. The flexible device for adapting different sizes of solder ball laser welding nozzle according to claim 1, wherein, The nozzle cover (1) is provided with a connecting ring (21), and the connecting ring (21) fixes the fixed sleeve (2) in the nozzle cover (1).

4. The flexible device for adapting different sizes of solder ball laser welding nozzle according to claim 1, wherein, The inclined section (61) extends outward on both sides to form an arc-shaped structure of the surrounding part (62), the cross-sectional area of the surrounding part (62) gradually decreases from top to bottom, and the surrounding gap between the adjacent two surrounding parts (62) blocks the tin ball.

5. The flexible device for adapting different sizes of solder ball laser welding nozzle according to claim 1, wherein, The lifting assembly comprises: The rotating sleeve (4) is rotationally arranged outside the fixed sleeve (2), and the inclined waist hole (41) is formed in the peripheral wall of the rotating sleeve (4); The guide pin (32) is fixed on the lifting sleeve (3) and penetrates the vertical waist hole (22) formed in the fixed sleeve (2) and is located in the inclined waist hole (41).

6. The flexible device for adapting laser welding nozzles to different solder ball sizes of claim 5, wherein, The lifting assembly further comprises: The connecting screw (7) penetrates the guide window (13) formed in the nozzle cover (1) and is connected with the connecting hole (42) radially formed in the rotating sleeve (4); The end of the connecting screw (7) abuts against the fixed sleeve (2) by rotating the connecting screw (7), so that the rotating sleeve (4) is locked relative to the fixed sleeve (2) after rotating.

7. The flexible device for adapting different sizes of solder ball laser welding nozzle according to claim 1, wherein, The peripheral wall of the nozzle cover (1) is provided with a feeding hole (12); the vertical feeding waist hole (31) is formed in the peripheral wall of the lifting sleeve (3), and the feeding waist hole (31) is located between the two nozzle pieces (6); the obliquely arranged communication pipe (5) is connected with the feeding hole (12) at one end and communicates with the feeding waist hole (31) at the other end.

8. The flexible device for adapting laser welding nozzles to different solder ball sizes of claim 4, wherein, The bottom end of the lifting sleeve (3) is a closing part (33) with gradually reduced inner diameter, and the bottom of the closing part (33) abuts against the surrounding part (62) of the nozzle piece (6).

9. The flexible device for adapting laser welding nozzles to different solder ball sizes of claim 5, wherein, The outer wall of the fixed sleeve (2) is provided with a snap spring (8) at the upper and lower positions, and the rotating sleeve (4) is axially limited between the two snap springs (8).

10. The flexible device for adapting laser welding nozzles to different solder ball sizes of claim 2, wherein, The top of the nozzle piece (6) is provided with a guide rod (63) extending towards the fixed sleeve (2), and the elastic element (9) is sleeved on the guide rod (63).

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