A laser cutting positioning fixture for cutting laser heat sinks

Abstract

A laser cutting positioning fixture for cutting laser heat sinks has a simple structure and can cut multiple heat sinks at a time. Compared with the previous manual single-piece heat sink cutting, the production efficiency is greatly improved. Due to the guiding effect of the guide groove, the cutting accuracy is improved, which solves the problem of poor precision in manual cutting of heat sinks. The operator does not have direct contact with the product during the entire cutting process of the heat sink, which effectively avoids the chip being susceptible to static electricity shock and contamination due to human factors. The heat sink is guided by the guide hole, so that the heat sink can be automatically arranged and pasted together after cutting, which solves the problem of low efficiency of manual arrangement after heat sink cutting, reduces the operation steps, and improves production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of laser chip cutting, and in particular to a laser cutting positioning fixture for cutting a laser heat sink. Background Art

[0002] During the laser packaging process, the laser chip needs to be sintered onto a rectangular heat sink. The heat generated by the chip during operation is effectively evacuated through the heat sink. Each heat sink has more than 500 evenly arranged heat sinks. After the chip is sintered, a single heat sink needs to be cut from the heat sink. The cut heat sink is evenly pasted on the paste board for use in the next process. At present, the commonly used technical means for heat sink cutting are to first paste the heat sink onto a film with a certain viscosity, cut the entire heat sink from the heat sink with a simple cutting tool, and then manually arrange each heat sink neatly. This method is cumbersome but inefficient for heat sink operation. The size of the heat sink after cutting varies greatly, the cutting accuracy is poor, and the consistency of the arrangement order of the heat sink after cutting is poor. During the manual cutting process, the chip is easily susceptible to electrostatic shock and contamination, which makes the laser chip fail and affects the product output rate. Compared with traditional cutting processes, laser cutting is simple to operate and has higher production efficiency, so it has gradually been widely used. However, the existing laser cutting machine needles cannot directly cut laser heat sinks, because when directly cutting the heat sink with a laser, the gas particles and high-temperature sparks generated in the cutting process can easily contaminate and damage the chip, resulting in a low cutting pass rate for the heat sink. At the same time, the heat sinks cannot be automatically arranged and pasted together after cutting. The heat sinks can only be taken out of the laser cutting machine one by one, and then manually arranged, which affects the cutting efficiency of the heat sink. Therefore, a laser cutting device and cutting method with a simple structure, convenient operation and high production efficiency that meet the requirements of laser heat sink cutting is needed to solve the problems existing in the current laser heat sink cutting work. Summary of the invention

[0003] In order to overcome the deficiencies of the above technologies, the present invention provides a laser cutting positioning fixture for cutting laser heat sinks, which can automatically arrange the cut laser heat sinks, has high cutting accuracy, is easy to operate, and improves production efficiency.

[0004] The technical solution adopted by the present invention to overcome the technical problems is:

[0005] A laser cutting positioning fixture for cutting a laser heat sink comprises a heat sink sheet, wherein M groups of heat sinks are arranged from top to bottom in the heat sink sheet, each group of heat sinks is arranged at equal intervals along the left and right directions, and each heat sink is provided with a laser chip, wherein N and M are both positive integers greater than or equal to 2.

[0006] Positioning seat, installed on the workbench of the laser cutting machine;

[0007] A plurality of lower plates are respectively inserted and fixed on the positioning seat through the lower plate positioning mechanism, a plurality of square grooves are arranged in the lower plate, the opening size of the square grooves matches the outer size of the heat sink, a protrusion is arranged around the lower end of the square groove, and the opening size of the surrounding protrusion is smaller than the opening size of the square groove;

[0008] The adhesive plate has an upper end surface which is a sticky adhesive surface. The outer dimensions of the adhesive plate match the opening dimensions of the square groove. The adhesive plate is inserted into the square groove and the lower end surface thereof contacts the upper end surface of the protrusion.

[0009] A guide plate, whose outer dimensions match the opening dimensions of the square slot, the adhesive plate is inserted into the square slot, the lower end surface of the guide plate contacts the upper end surface of the adhesive plate, the heat sink is inserted into the square slot, the lower end surface of the heat sink contacts the upper end surface of the guide plate, the guide plate is provided with M groups of holes in the up-down direction, each hole group is provided with N guide holes in the left-right direction, each guide hole is located directly below the corresponding heat sink, and the opening dimension of the guide hole is larger than the outer dimensions of the heat sink; and

[0010] The upper cover is buckled on the top of the lower plate through the upper cover positioning mechanism, and a plurality of upper cover bosses are arranged at the lower end of the upper cover, and the outer dimensions of the upper cover bosses match the opening dimensions of the square grooves of the lower plate. When the upper cover is buckled on the top of the lower plate, the upper cover bosses are inserted into the corresponding square grooves, and each upper cover boss is provided with M guide grooves horizontally arranged along the left and right directions from top to bottom, and the cutting grooves on the N heat sinks of each heat sink group are located directly below the corresponding guide grooves, and the width of the guide grooves matches the width of the cutting grooves.

[0011] Furthermore, the above-mentioned lower plate positioning mechanism includes a plurality of positioning protrusions arranged on the positioning seat and a positioning groove II arranged below the lower plate and matching the size of the positioning protrusions. The outer periphery of the positioning protrusions on the positioning seat surrounds a positioning groove I, the positioning protrusions are inserted into the positioning groove II, and the annular area outside the positioning groove II below the lower plate is inserted into the positioning groove I.

[0012] Furthermore, the upper cover positioning mechanism includes an upper cover groove arranged around the lower end of the upper cover and a lower plate boss arranged around the upper end of the lower plate. When each upper cover boss is inserted into the corresponding square groove, the lower plate boss is inserted into the upper cover groove.

[0013] In order to prevent gas particles and sparks from damaging the heat sink and laser chip, N protective grooves are arranged at intervals along the left and right directions at the lower end of the guide groove. When the upper cover is buckled onto the lower plate, the N heat sinks on each heat sink group are respectively located in their corresponding protective grooves.

[0014] The beneficial effect of the present invention is that the broken heat sink slides down to the adhesive plate at the lower end of the guide plate through the corresponding guide holes under the action of gravity. Since the upper surface of the adhesive plate has a certain viscosity, the lower surface of the heat sink is attached to the adhesive plate. When all the heat sinks on a heat sink sheet in a lower plate are cut, the buckled lower plate and the upper cover are taken out from the positioning seat. After opening the upper cover, the frame part of the cut heat sink sheet is taken out from the square groove, and then the guide plate and the adhesive plate are taken out. The adhesive plate is gently peeled off from the guide plate, and the cut heat sinks are evenly arranged on the adhesive plate. The structure is simple, and multiple heat sink sheets can be cut at one time. Compared with the previous manual single-piece heat sink sheet cutting, the production efficiency is greatly improved. Due to the guiding effect of the guide groove, the cutting accuracy is improved, and the problem of poor precision of manual cutting of heat sinks is solved. The operator does not have direct contact with the product during the entire cutting process of the heat sink, which effectively avoids the chip being easily susceptible to static electricity shock and pollution due to human factors. By guiding the heat sink through the guide holes, the heat sinks can be automatically arranged and pasted together after cutting, which solves the problem of low efficiency of manual arrangement after cutting the heat sink, reduces the operation steps and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure after the upper cover and the lower plate of the present invention are buckled together;

[0017] Figure 3 It is a structural schematic diagram of the positioning seat of the present invention;

[0018] Figure 4 It is a schematic diagram of the three-dimensional explosion structure of the upper cover and the lower plate of the present invention;

[0019] Figure 5 Schematic diagram I of the three-dimensional structure of the lower plate of the present invention;

[0020] Figure 6 Schematic diagram II of the three-dimensional structure of the lower plate of the present invention;

[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of the upper cover of the present invention;

[0022] Figure 8 It is a schematic diagram of the enlarged structure of the present invention;

[0023] Fig. 9 It is a schematic diagram of the three-dimensional structure of the guide plate of the present invention;

[0024] Fig.10 It is a schematic diagram of the three-dimensional structure of the heat sink of the present invention;

[0025] Fig.11It is a schematic diagram of the three-dimensional structure of the heat sink part of the present invention;

[0026] In the figure, 1. laser cutting machine workbench 2. positioning seat 3. positioning protrusion 4. positioning groove I 5. lower plate 51. lower plate boss 52. square groove 53. protrusion 54. positioning groove II 6. upper cover 61. upper cover boss 62. upper cover groove 63. guide groove 64. protective groove 7. adhesive plate 8. guide plate 81. guide hole 9. heat sink 91. heat sink 92. laser chip 93. cutting groove. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 To Attachment Fig.11 The present invention is further described.

[0028] A laser cutting positioning fixture for cutting a laser heat sink comprises a heat sink sheet 9, wherein M heat sink groups are arranged from top to bottom in the heat sink sheet 9, wherein N heat sinks 91 are arranged at equal intervals in the left-right direction in each heat sink group, wherein a laser chip 92 is arranged on each heat sink 91, wherein N and M are both positive integers greater than or equal to 2, and a positioning seat 2 is installed on a workbench 1 of a laser cutting machine; and a plurality of lower plates 5 are respectively inserted and fixed on the positioning seat 2 through a lower plate positioning mechanism, wherein a plurality of square grooves 52 are arranged in the lower plate 5, The opening size of the square groove 52 matches the outer size of the heat sink 9, and a protrusion 53 is arranged around the lower end of the square groove 52, and the opening size of the surrounding protrusion 53 is smaller than the opening size of the square groove 52; the adhesive plate 7, whose upper end surface is a sticky adhesive surface, the outer size of the adhesive plate 7 matches the opening size of the square groove 52, the adhesive plate 7 is inserted into the square groove 52 and its lower end surface contacts the upper end surface of the protrusion 53; the guide plate 8, whose outer size matches the opening size of the square groove 52, and the adhesive plate 7 is inserted into the square groove 52, the lower end surface of the guide plate 8 contacts the upper end surface of the adhesive plate 7, the heat sink 9 is inserted into the square groove 52, the lower end surface of the heat sink 9 contacts the upper end surface of the guide plate 8, the guide plate 8 is provided with M groups of holes in the up-down direction, each hole group is provided with N guide holes 81 in the left-right direction, each guide hole 81 is located directly below the corresponding heat sink 91, and the opening size of the guide hole 81 is larger than the outer size of the heat sink 91; and the upper cover 6 is buckled on the upper part of the lower plate 5 through the upper cover positioning mechanism, and the upper cover is provided with M groups of holes in the up-down direction, each hole group is provided with N guide holes 81 in the left-right direction, each guide hole 81 is located directly below the corresponding heat sink 91, and the opening size of the guide hole 81 is larger than the outer size of the heat sink 91. A plurality of upper cover bosses 61 are provided at the lower end of the cover 6, and the outer dimensions of the upper cover bosses 61 match the opening dimensions of the square grooves 52 of the lower plate 5. When the upper cover 6 is buckled on the upper part of the lower plate 5, the upper cover bosses 61 are inserted into the corresponding square grooves 52. Each upper cover boss 61 is provided with M guide grooves 63 horizontally arranged along the left-right direction from top to bottom. The cutting grooves 93 on the N heat sinks 91 of each heat sink group are located directly below the corresponding guide grooves 63, and the width of the guide grooves 63 matches the width of the cutting grooves 93. When in use, place the adhesive plate 7 into the square groove 52 of the lower plate 5. The protrusion 53 can prevent the adhesive plate 7 from falling downward. The sticky upper surface of the adhesive plate 7 bonds the guide plate 8. The heat sink 9 is also located in the square groove 52. Then, the upper cover 6 is buckled on the lower plate 51 through the upper cover positioning mechanism, and the upper cover body 61 is inserted into the corresponding square groove 52 to achieve the compression of the heat sink 9, guide plate 8 and adhesive plate 7 arranged from top to bottom, completing the assembly of the entire clamp.After that, several lower plates 5 are fixed to the positioning seat 2 through the lower plate positioning mechanism. Since the positioning seat 2 is installed on the workbench of the laser cutting machine, the workbench of the laser cutting machine moves, so that the laser moves along the guide groove 63 on the upper cover 6. Since the cutting groove 93 of each heat sink 91 is located below the guide groove 63, the cutting groove 93 of a group of heat sinks 91 automatically melts and breaks after being irradiated by the laser. The broken heat sinks 91 slide through their corresponding guide holes 81 under the action of gravity to the adhesive at the lower end of the guide plate 8. On the board 7, since the upper surface of the adhesive board 7 has a certain degree of stickiness, the lower surface of the heat sink 91 is adhered to the adhesive board 7. When all the heat sinks 91 on a heat sink sheet 9 in a lower plate are cut, the buckled lower plate 5 and the upper cover 6 are taken out from the positioning seat 2. After opening the upper cover 6, the frame part of the cut heat sink sheet 9 is taken out from the square groove 52, and then the guide plate 8 and the adhesive board are taken out, and the adhesive board 7 is gently peeled off from the guide plate 8. The cut heat sinks 91 will be evenly arranged on the adhesive board 7. The structure is simple, and multiple heat sink sheets 9 can be cut at one time. Compared with the previous manual single-piece heat sink sheet cutting, the production efficiency is greatly improved. Due to the guiding effect of the guide groove 63, the cutting accuracy is improved, and the problem of poor precision of manual cutting of heat sinks is solved. The operator does not have direct contact with the product during the entire cutting process of the heat sink, which effectively avoids the human factors that easily cause the chip to be susceptible to static electricity shock and pollution. By guiding the heat sink 91 through the guide hole 81, the heat sinks can be automatically arranged and pasted together after cutting, which solves the problem of low efficiency of manual arrangement after cutting the heat sink, reduces the operation steps and improves production efficiency.

[0029] The lower plate positioning mechanism may be a structure as follows, which includes a plurality of positioning protrusions 3 provided on the positioning seat 2 and a positioning groove II 54 provided below the lower plate 5 and having a size matching that of the positioning protrusions 3, the periphery of the positioning protrusions 3 on the positioning seat 2 surrounds the positioning groove I 4, the positioning protrusions 3 are inserted into the positioning groove II 54, and the annular area outside the positioning groove II 54 below the lower plate 5 is inserted into the positioning groove I 4. The lower plate 5 is quickly positioned and connected to the positioning seat 2 by inserting the annular area outside the positioning groove II 54 below the lower plate 5 into the positioning groove I 4.

[0030] The upper cover positioning mechanism may be a structure including an upper cover groove 62 disposed around the lower end of the upper cover 6 and a lower plate boss 51 disposed around the upper end of the lower plate 5. When each upper cover boss 61 is inserted into the corresponding square groove 52, the lower plate boss 51 is inserted into the upper cover groove 62. The lower plate boss 51 is inserted into the upper cover groove 62 to realize a quick positioning connection between the lower plate 5 and the upper cover 6.

[0031] Furthermore, N protective grooves 64 are arranged at intervals along the left-right direction at the lower end of the guide groove 63. When the upper cover 6 is buckled onto the lower plate 5, the N heat sinks 91 on each heat sink group are respectively located in their corresponding protective grooves 64. Since the heat sinks 91 are embedded in the corresponding protective grooves 64, it is possible to effectively prevent the gas particles and sparks generated by cutting along the guide groove 63 from damaging the heat sink 91 and the laser chip 92 on the heat sink 91.

[0032] The above description is only a preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A laser cutting positioning fixture for cutting a laser heat sink, comprising a heat sink sheet (9), wherein M groups of heat sinks are arranged from top to bottom in the heat sink sheet (9), wherein each group of heat sinks (91) is arranged at equal intervals in the left-right direction, and each heat sink (91) is provided with a laser chip (92), wherein N and M are both positive integers greater than or equal to 2, and wherein: A positioning seat (2) is installed on the laser cutting machine workbench (1); A plurality of lower plates (5) are respectively inserted and fixed on the positioning seat (2) through the lower plate positioning mechanism, a plurality of square grooves (52) are arranged in the lower plate (5), the opening size of the square grooves (52) matches the outer size of the heat sink (9), a protrusion (53) is arranged around the lower end of the square groove (52), and the opening size of the surrounding protrusion (53) is smaller than the opening size of the square groove (52); The adhesive plate (7) has an upper end surface which is a sticky adhesive surface. The outer dimensions of the adhesive plate (7) match the opening dimensions of the square groove (52). The adhesive plate (7) is inserted into the square groove (52) and its lower end surface contacts the upper end surface of the protrusion (53). A guide plate (8) whose outer dimensions match the opening dimensions of the square groove (52); the adhesive plate (7) is inserted into the square groove (52); the lower end surface of the guide plate (8) contacts the upper end surface of the adhesive plate (7); the heat sink (9) is inserted into the square groove (52); the lower end surface of the heat sink (9) contacts the upper end surface of the guide plate (8); the guide plate (8) is provided with M groups of holes in the vertical direction; each group of holes is provided with N guide holes (81) in the horizontal direction; each guide hole (81) is located directly below the corresponding heat sink (91); and the opening dimensions of the guide holes (81) are larger than the outer dimensions of the heat sink (91); and The upper cover (6) is buckled on the upper part of the lower plate (5) through an upper cover positioning mechanism. A plurality of upper cover bosses (61) are arranged at the lower end of the upper cover (6). The outer dimensions of the upper cover bosses (61) match the opening dimensions of the square grooves (52) of the lower plate (5). When the upper cover (6) is buckled on the upper part of the lower plate (5), the upper cover bosses (61) are inserted into the corresponding square grooves (52). M guide grooves (63) are arranged horizontally in the left-right direction from top to bottom on each upper cover boss (61). The cutting grooves (93) on the N heat sinks (91) of each heat sink group are located directly below the corresponding guide grooves (63). The width of the guide grooves (63) matches the width of the cutting grooves (93).

2. The laser cutting positioning fixture for cutting a laser heat sink according to claim 1, characterized in that: The lower plate positioning mechanism comprises a plurality of positioning protrusions (3) arranged on the positioning seat (2) and a positioning groove II (54) arranged below the lower plate (5) and having a size matching that of the positioning protrusions (3). The positioning protrusions (3) on the positioning seat (2) are surrounded by a positioning groove I (4). The positioning protrusions (3) are inserted into the positioning groove II (54). The annular area outside the positioning groove II (54) below the lower plate (5) is inserted into the positioning groove I (4).

3. The laser cutting positioning fixture for cutting a laser heat sink according to claim 1, characterized in that: The upper cover positioning mechanism comprises an upper cover groove (62) arranged around the lower end of the upper cover (6) and a lower plate boss (51) arranged around the upper end of the lower plate (5); when each upper cover boss (61) is inserted into the corresponding square groove (52), the lower plate boss (51) is inserted into the upper cover groove (62).

4. The laser cutting positioning fixture for cutting a laser heat sink according to claim 1, characterized in that: The lower end of the guide groove (63) is provided with N protective grooves (64) at intervals along the left-right direction, and when the upper cover (6) is buckled onto the lower plate (5), the N heat sinks (91) on each heat sink group are respectively located in their corresponding protective grooves (64).

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