Positioning device for chip packaging

Abstract

The invention discloses a positioning device for chip packaging. The positioning device comprises a workbench, a feeding and discharging mechanism, a first positioning mechanism, a second positioning mechanism and a fixing mechanism for pressing a chip downwards, the feeding and discharging mechanism comprises two trays used for containing chips, a connecting block is connected between the two trays and moves synchronously, through grooves corresponding to the trays are formed in the workbench, and the first positioning mechanism comprises positioning pieces movably arranged on the left side and the right side of the through groove and used for positioning the chips. The second positioning mechanism comprises push plates movably arranged on the front side and the rear side of the workbench, and the two push plates are arranged on the two sides of the through groove correspondingly and move in the opposite directions. The chip packaging machine has the beneficial effects that the loading and unloading process of one chip and the packaging process of the other chip are synchronously carried out through the loading and unloading mechanism, and the chips are positioned and fixed through the first positioning mechanism, the second positioning mechanism and the fixing mechanism, so that the packaging quality of the chips is ensured.

Description

Technical Field

[0001] The invention belongs to the field of chip packaging, and in particular relates to a positioning device for chip packaging. Background Art

[0002] Chip packaging is a bridge that connects the internal and external circuits of a chip. It is a shell used to install semiconductor integrated circuit chips. It plays the role of placing, fixing, sealing, protecting the chip and enhancing the electrical and thermal performance. In order to facilitate the packaging operation during chip packaging, the chip needs to be quickly positioned using a rapid positioning device. Summary of the invention

[0003] The object of the present invention is to provide a positioning device for chip packaging.

[0004] To achieve the above object, the present invention provides the following technical solutions: A positioning device for chip packaging, comprising a workbench, a loading and unloading mechanism, a first positioning mechanism, a second positioning mechanism and a fixing mechanism for pressing down the chip; the loading and unloading mechanism comprises two trays for holding chips, a connecting block is connected between the two trays for synchronous movement, a through slot corresponding to the tray is opened on the workbench, the first positioning mechanism comprises positioning members movably arranged on the left and right sides of the through slot for positioning the chip, the second positioning mechanism comprises push plates movably arranged on the front and rear sides of the workbench, the two push plates are respectively on both sides of the through slot and move towards each other.

[0005] Preferably, the loading and unloading mechanism also includes a first fixed plate and a second fixed plate placed vertically under the workbench, the first fixed plate having a U-shaped groove along its thickness direction, a movable rod rotatably connected to the center of the connecting block, the movable rod vertically penetrates and moves in the U-shaped groove, a slot having the same path as the U-shaped groove is provided on the second fixed plate, a block sliding in the slot is provided at the end of the movable rod away from the connecting block, and a driving component for driving the movable rod to move along the path of the U-shaped groove is also provided on the first fixed plate.

[0006] Preferably, the driving assembly includes a first motor arranged on the side of the first fixed plate away from the connecting block, the output end of the first motor is connected to a lever, the lever has a waist-shaped groove along its length direction, and the movable rod passes through the waist-shaped groove.

[0007] Preferably, a guide rail is horizontally arranged at the bottom of the first fixing plate, a slider is slidably arranged on the guide rail, two first sliding rods are arranged on the slider, and the two first sliding rods pass through the connecting block.

[0008] Preferably, the left and right sides of the tray are provided with a plurality of first slide grooves penetrating through the thickness direction thereof, the workbench is provided with second through grooves which are located in the same straight line as and connected to the first slide grooves, and the positioning member moves back and forth between the first through grooves and the second through grooves.

[0009] Preferably, a movable plate is provided at the bottom of the workbench on the left and right sides of the through slot, a rotating plate is rotatably provided on the movable plate, one end of the rotating plate away from the movable plate is connected to the positioning piece, and a first cylinder for driving the movable plate to move is also provided at the bottom of the workbench.

[0010] Preferably, the positioning member includes a slide cylinder and a positioning rod located above the slide cylinder, the slide cylinder is arranged on the rotating plate, a second slide rod sliding in the slide cylinder is arranged at the bottom of the positioning rod, a spring is arranged between the top of the slide cylinder and the bottom of the positioning rod, a frustum is arranged on the outer peripheral wall of the positioning rod, the cross-sectional area of ​​the top surface of the frustum is smaller than the cross-sectional area of ​​the bottom surface, and a wedge block corresponding to the frustum is arranged at the bottom of the workbench.

[0011] Preferably, a screw located on the left side of the through slot and a third sliding rod located on the right side of the through slot are arranged above the workbench, the screw and the two push plates are threadedly connected, the thread directions of the screw from the center to both ends are opposite, the two push plates are threadedly connected to the two opposite sections of the thread line of the screw respectively, and the distances from the two push plates to the center of the screw are equal, the third sliding rod is slidably connected to the two push plates, and a second motor coaxially connected to the screw is arranged on the workbench.

[0012] Preferably, the push plate has an L-shaped cross section, and the fixing mechanism comprises a second cylinder disposed on a side of the push plate facing away from each other, and a movable end of the second cylinder is connected to a first pressing block via a connecting rod.

[0013] Preferably, the workbench is provided with a third cylinder located on the left and right sides of the through groove, a sleeve is sleeved on the outer peripheral wall of the third cylinder, a limiting groove is opened on the sleeve and passes through its side wall, the limiting groove includes a strip groove and an arc groove which are interconnected, the strip groove is located below the arc groove, the movable end of the third cylinder is rotatably connected to a rotating rod, the rotating rod passes through the limiting groove and is connected to a second pressure block.

[0014] The beneficial effects of the present invention are as follows: the loading and unloading process of one chip and the packaging process of another chip are carried out synchronously through the loading and unloading mechanism, the chip is positioned by the first positioning mechanism and the second positioning mechanism to ensure the accuracy of chip packaging, and the chip is fixed by the fixing mechanism to prevent displacement during the packaging process and affect the packaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a side view of the loading and unloading mechanism in the present invention.

[0017] Figure 3 It is a partial cross-sectional view of the movable rod and the second fixed plate in the present invention.

[0018] Figure 4 It is a top view of the first positioning mechanism in the present invention.

[0019] Figure 5 It is a cross-sectional view of the positioning member and the wedge block in the present invention.

[0020] Figure 6 yes Figure 1 A is an enlarged schematic diagram.

[0021] Among them: 11, workbench; 12, second slide; 13, support block; 201, first fixed plate; 202, U-shaped groove; 203, movable rod; 204, lever; 205, waist groove; 206, guide rail; 207, slider; 208, first slide; 209, connecting block; 210, tray; 211, first slide; 212, second fixed plate; 213, slot; 214, block; 31 , the first cylinder; 32, the moving plate; 33, the rotating plate; 34, the slide; 35, the positioning rod; 36, the second slide rod; 37, the spring; 38, the round table; 39, the wedge block; 41, the second motor; 42, the screw; 43, the third slide rod; 44, the push plate; 51, the second cylinder; 52, the first pressure block; 53, the sleeve; 54, the limiting groove; 55, the third cylinder; 56, the rotating rod; 57, the second pressure block. DETAILED DESCRIPTION

[0022] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0023] like Figures 1 to 6 As shown, a positioning device for chip packaging of the present invention comprises a workbench 11, a loading and unloading mechanism, a first positioning mechanism, a second positioning mechanism and a fixing mechanism for pressing down the chip; the loading and unloading mechanism comprises two trays 210 for holding the chip, a connecting block 209 is connected between the two trays 210 for synchronous movement, a through slot corresponding to the tray 210 is opened on the workbench 11, the first positioning mechanism comprises positioning members movably arranged on the left and right sides of the through slot for positioning the chip, and the second positioning mechanism comprises push plates 44 movably arranged on the front and rear sides of the workbench 11, and the two push plates 44 are respectively arranged on both sides of the through slot and move towards each other; The two trays 210 are controlled to move to the through slot at intervals by the back-and-forth movement of the loading and unloading mechanism. When one of the trays 210 is located at the through slot for packaging, the other tray 210 moves to the loading and unloading area to unload the packaged chips and replace new chips for loading. The chips are placed on the tray 210. When the tray 210 moves to the through slot, the first positioning mechanism and the second positioning mechanism position the chip from the left and right sides and the front and back sides respectively to prevent the chip from being unqualified due to position deviation. After positioning, the chip is fixed by the fixing mechanism to prevent the chip from deflecting during the packaging process.

[0024] The loading and unloading mechanism also includes a first fixed plate 201 and a second fixed plate 212 vertically placed below the workbench 11. The first fixed plate 201 is provided with a U-shaped groove 202 along its thickness direction. A movable rod 203 is rotatably connected at the center of the connecting block 209. The movable rod 203 vertically penetrates and moves in the U-shaped groove 202. A clamping groove 213 having the same path as the U-shaped groove 202 is provided on the second fixed plate 212. A clamping block 214 sliding in the clamping groove 213 is provided at one end of the movable rod 203 away from the connecting block 209. A driving component for driving the movable rod 203 to move along the path of the U-shaped groove 202 is also provided on the first fixed plate 201. The movable rod 203 is driven to move by the driving assembly, and the movable rod 203 moves along the path of the U-shaped groove 202. When the movable rod 203 moves to the two ends of the U-shaped groove 202, one of the trays 210 just moves to the through groove, and the other tray 210 just moves to the loading and unloading area. The connecting block 209 is connected to one side of the movable rod 203, which easily causes the movable rod 203 to tilt. The card slot 213 on the second fixed plate 212 limits the card block 214 at the end of the movable rod 203 to prevent the movable rod 203 from tilting.

[0025] The driving assembly includes a first motor arranged on the side of the first fixed plate 201 away from the connecting block 209, and the output end of the first motor is connected to a lever 204, and the lever 204 has a waist-shaped groove 205 along its length direction, and the movable rod 203 passes through the waist-shaped groove 205; the first motor drives the lever 204 to rotate forward and reverse, thereby driving the movable rod 203 to move along the path of the U-shaped groove 202.

[0026] A guide rail 206 is horizontally arranged at the bottom of the first fixed plate 201, a slider 207 is slidably arranged on the guide rail 206, two first slide bars 208 are arranged on the slider 207, and the two first slide bars 208 pass through the connecting block 209; The connection block 209 is limited by the first sliding rod 208 to prevent the connection block 209 from rotating and causing the tray 210 to deflect, so that the surface of the tray 210 is not flush with the workbench 11.

[0027] A plurality of first slide grooves 211 are provided on the left and right sides of the tray 210 and extend through the thickness direction thereof. A second through groove is provided on the workbench 11 and is located on the same straight line as and connected to the first slide grooves 211. The positioning member moves back and forth between the first through groove and the second through groove. At least two first slide grooves 211 are provided on both sides of each tray 210. When the positioning member slides into the first through groove, if the placement position of the chip deviates, the positioning rod 35 can press the chip to cause the chip to deflect or move, thereby correcting the placement position of the chip.

[0028] The bottom of the workbench 11 is provided with a movable plate 32 located on the left and right sides of the through slot, a rotating plate 33 is rotatably provided on the movable plate 32, and one end of the rotating plate 33 away from the movable plate 32 is connected to the positioning member, and the bottom of the workbench 11 is also provided with a first cylinder 31 for driving the movable plate 32 to move; A support block 13 for supporting the movable plate 32 is provided at the bottom of the workbench 11. The two movable plates 32 are driven to move forward and backward synchronously by the first cylinder 31. Under the restriction of the first slide groove 211 on the positioning member, the positioning member is translated along the length of the first slide groove 211 and the second slide groove 12.

[0029] The U-shaped groove 202 mentioned above is composed of straight grooves on both sides and arc grooves below the two straight grooves. The straight grooves on both sides make the last section of the movable rod 203 when it moves to the end of the U-shaped groove 202 vertical up and down, which can make the tray 210 better embedded in the through groove. At the same time, when the tray 210 is moved away from the through groove, it first moves vertically downward to avoid collision with the movable plate 32 during subsequent movement.

[0030] The positioning member includes a slide cylinder 34 and a positioning rod 35 located above the slide cylinder 34. The slide cylinder 34 is arranged on the rotating plate 33. A second slide rod 36 sliding in the slide cylinder 34 is arranged at the bottom of the positioning rod 35. A spring 37 is arranged between the top of the slide cylinder 34 and the bottom of the positioning rod 35. A round table 38 is arranged on the outer peripheral wall of the positioning rod 35. The cross-sectional area of ​​the top surface of the round table 38 is smaller than the cross-sectional area of ​​the bottom surface. A wedge block 39 corresponding to the round table 38 is arranged at the bottom of the workbench 11. When the positioning member moves from the first slide groove 211 to the second slide groove 12, the table 38 contacts the wedge block 39. Under the action of the wedge block 39, the positioning rod 35 moves downward during the translation process, so that the top end of the positioning rod 35 drops below the upper surface of the workbench 11 to avoid interference with other steps of the packaging process. During the descent, the spring 37 is compressed. When the positioning rod 35 moves from the second slide groove 12 to the first slide groove 211, the elastic potential energy of the spring 37 is converted into kinetic energy, and the positioning rod 35 moves upward to protrude from the upper surface of the workbench 11 to facilitate positioning of the chip.

[0031] A screw rod 42 located on the left side of the through slot and a third slide rod 43 located on the right side of the through slot are arranged above the workbench 11. The screw rod 42 is threadedly connected to two push plates 44. The screw rod 42 has opposite thread directions from the center to both ends. The two push plates 44 are respectively threadedly connected to two opposite sections of the screw rod 42, and the distances from the two push plates 44 to the center of the screw rod 42 are equal. The third slide rod 43 is slidably connected to the two push plates 44. A second motor 41 coaxially connected to the screw rod 42 is arranged on the workbench 11; The screw 42 is parallel to the third slide bar 43, and the screw 42 is driven to rotate by the second motor 41. Since the third slide bar 43 restricts the push plate 44, the push plate 44 will eventually translate along the length direction of the screw 42. Since the two sections of the thread on the screw 42 have opposite thread directions, the two push plates 44 will move in opposite directions to push the chip to the center of the tray 210 to achieve final positioning.

[0032] The push plate 44 has an L-shaped cross section, and the fixing mechanism includes a second cylinder 51 disposed on a side of the push plate 44 that is away from each other, and a movable end of the second cylinder 51 is connected to a first pressing block 52 via a connecting rod; The push plate 44 is L-shaped, including an integrally formed horizontal plate and a vertical plate. The vertical plate is used to push the chip for positioning, and the horizontal plate is used to place the second cylinder 51. The second cylinder 51 drives the first pressing block 52 to rise and fall to fix the chip and prevent the chip from shifting during the packaging process.

[0033] The workbench 11 is provided with a third cylinder 55 located on the left and right sides of the through groove. A sleeve 53 is sleeved on the outer peripheral wall of the third cylinder 55. The sleeve 53 is provided with a limiting groove 54 penetrating its side wall. The limiting groove 54 includes a strip groove and an arc groove that are interconnected. The strip groove is located below the arc groove. The movable end of the third cylinder 55 is rotatably connected to a rotating rod 56. The rotating rod 56 penetrates the limiting groove 54 and is connected to a second pressing block 57. When the second cylinder 51 fixes the chip, the first pressure block 52 and the like may cause some obstruction to the local packaging, so the third cylinder 55 is added, and the second cylinder 51 and the third cylinder 55 are switched to avoid obstruction to the packaging. Initially, the length direction of the rotating rod 56 on the third cylinder 55 is parallel to the length direction of the screw 42. At this time, the rotating rod 56 is located on the left and right sides of the through groove, and will not cause obstruction to the chip packaging. When the movable end of the third cylinder 55 retracts, it is restricted by the limit groove 54, and the rotating rod 56 will rotate in the direction of the arc groove, that is, the rotating rod 56 will rotate during the downward movement, so that the second pressure block 57 is moved to the top of the through groove, and when the rotating rod 56 moves to the strip groove, it will move vertically up and down to fix the chip.

[0034] Working principle: When in use, there are two loading and unloading areas on the left and right sides of the workbench 11. When one of the trays 210 moves to the loading and unloading area, the chip is placed on the tray 210 manually or by machine, and then the first motor is started to drive the lever 204 to rotate, so that the movable rod 203 moves from one end of the U-shaped groove 202 to the other end of the U-shaped groove. At this time, the tray 210 moves to the through groove, and then the movable end of the first cylinder 31 extends to drive multiple positioning rods 35 to move synchronously from the second slide groove 12 to the first slide groove 211. Multiple positioning rods 35 touch the chip to perform preliminary positioning on the chip so that the position of the chip is straightened and the chip is located at the center of the left and right sides of the tray 210. Then the movable end of the first cylinder 31 retracts, driving the positioning rod 35 to move toward the second slide groove 12. During the movement, the round table 38 on the positioning rod 35 contacts the wedge block 39, so that The positioning rod 35 slides downward to below the upper surface of the workbench 11, and then the second motor 41 starts to drive the screw 42 to rotate, so that the two push plates 44 move toward each other, so that the chip moves to the center of the front and rear sides of the tray 210 for positioning, and then the second motor 41 reverses to keep a certain distance between the push plate 44 and the chip for subsequent packaging. The movable end of the second cylinder 51 on the push plate 44 is connected to the first pressing block 52 through a connecting piece, and the connecting piece faces the direction of the through groove. The movable end of the second cylinder 51 retracts and drives the first pressing block 52 to move downward to fix the chip, and then the packaging mechanism (not shown in the figure) packages the left and right sides of the chip. When it is necessary to package the front and rear sides of the chip, the second motor 41 continues to reverse and drives the push plate 44 and the second cylinder 51 away from the chip. At the same time, the movable end of the third cylinder 55 retracts, driving the movable rod 203 to rotate and move downward to fix the chip; In the above process, when one of the trays 210 is located at the through slot, the other tray 210 must be located in the loading and unloading area. The loading and unloading area is not limited to the loading and unloading work, and detection steps can also be added in the loading and unloading area according to demand and packaging time.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A positioning device for chip packaging, characterized in that: The invention comprises a workbench (11), a loading and unloading mechanism, a first positioning mechanism, a second positioning mechanism and a fixing mechanism for pressing down a chip; the loading and unloading mechanism comprises two trays (210) for holding chips, a connecting block (209) is connected between the two trays (210) for synchronous movement, a through slot corresponding to the tray (210) is provided on the workbench (11), the first positioning mechanism comprises positioning members movably arranged on the left and right sides of the through slot for positioning the chip, and the second positioning mechanism comprises push plates (44) movably arranged on the front and rear sides of the workbench (11), and the two push plates (44) are respectively located on the two sides of the through slot and move towards each other.

2. The chip packaging positioning device according to claim 1, characterized in that: The loading and unloading mechanism further comprises a first fixed plate (201) and a second fixed plate (212) vertically placed below the workbench (11); the first fixed plate (201) is provided with a U-shaped groove (202) along its thickness direction; a movable rod (203) is rotatably connected at the center of the connecting block (209); the movable rod (203) vertically penetrates and moves in the U-shaped groove (202); a clamping groove (213) having the same path as the U-shaped groove (202) is provided on the second fixed plate (212); a clamping block (214) sliding in the clamping groove (213) is provided at one end of the movable rod (203) away from the connecting block (209); and a driving component for driving the movable rod (203) to move along the path of the U-shaped groove (202) is also provided on the first fixed plate (201).

3. The chip packaging positioning device according to claim 2, characterized in that: The driving assembly comprises a first motor arranged on a side of the first fixed plate (201) away from the connecting block (209), the output end of the first motor being connected to a lever (204), the lever (204) being provided with a waist-shaped groove (205) along its length direction, and the movable rod (203) passing through the waist-shaped groove (205).

4. The positioning device for chip packaging according to claim 3, characterized in that: A guide rail (206) is horizontally arranged at the bottom of the first fixed plate (201), a slider (207) is slidably arranged on the guide rail (206), two first sliding rods (208) are arranged on the slider (207), and the two first sliding rods (208) pass through the connecting block (209).

5. The positioning device for chip packaging according to claim 1, characterized in that: The tray (210) is provided with a plurality of first slide grooves (211) penetrating the tray in its thickness direction on the left and right sides, the workbench (11) is provided with a second through groove located on the same straight line as the first slide grooves (211) and connected thereto, and the positioning member moves back and forth between the first through grooves and the second through grooves.

6. The positioning device for chip packaging according to claim 5, characterized in that: The bottom of the workbench (11) is provided with movable plates (32) located on the left and right sides of the through slot, a rotating plate (33) is rotatably provided on the movable plate (32), one end of the rotating plate (33) away from the movable plate (32) is connected to a positioning member, and the bottom of the workbench (11) is also provided with a first cylinder (31) for driving the movable plate (32) to move.

7. The positioning device for chip packaging according to claim 6, characterized in that: The positioning member comprises a slide cylinder (34) and a positioning rod (35) located above the slide cylinder (34); the slide cylinder (34) is arranged on the rotating plate (33); a second slide rod (36) sliding in the slide cylinder (34) is arranged at the bottom of the positioning rod (35); a spring (37) is arranged between the top of the slide cylinder (34) and the bottom of the positioning rod (35); a round table (38) is arranged on the outer peripheral wall of the positioning rod (35); the cross-sectional area of ​​the top surface of the round table (38) is smaller than the cross-sectional area of ​​the bottom surface; and a wedge block (39) corresponding to the round table (38) is arranged at the bottom of the workbench (11).

8. The positioning device for chip packaging according to claim 1, characterized in that: A screw rod (42) located on the left side of the through slot and a third slide rod (43) located on the right side of the through slot are arranged above the workbench (11); the screw rod (42) and the two push plates (44) are both threadedly connected; the screw rod (42) has opposite thread directions from the center to both ends; the two push plates (44) are respectively threadedly connected to two opposite sections of the screw rod (42); and the distances from the two push plates (44) to the center of the screw rod (42) are equal; the third slide rod (43) and the two push plates (44) are both slidably connected; and a second motor (41) coaxially connected to the screw rod (42) is arranged on the workbench (11).

9. The positioning device for chip packaging according to claim 8, characterized in that: The push plate (44) has an L-shaped cross section, and the fixing mechanism comprises a second cylinder (51) arranged on a side of the push plate (44) that faces away from each other, and a movable end of the second cylinder (51) is connected to a first pressing block (52) via a connecting rod.

10. The positioning device for chip packaging according to claim 1, characterized in that: The workbench (11) is provided with a third cylinder (55) located on the left and right sides of the through groove. A sleeve (53) is sleeved on the outer peripheral wall of the third cylinder (55). The sleeve (53) is provided with a limiting groove (54) penetrating the side wall thereof. The limiting groove (54) comprises a strip groove and an arc groove which are interconnected. The strip groove is located below the arc groove. The movable end of the third cylinder (55) is rotatably connected to a rotating rod (56). The rotating rod (56) penetrates the limiting groove (54) and is connected to a second pressing block (57).

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