Pre-assembly press-fit jig and press-fit method

Abstract

The invention discloses a pre-assembly press-fit jig which is used for automatically assembling small parts and main boards and comprises a jig lower die and a jig upper die which are matched with each other. The jig lower die comprises a base plate, and the upper surface of the base plate is provided with a second positioning mechanism and a plurality of first positioning mechanisms. The first positioning mechanism has a first relative height for bearing small parts relative to the substrate, and the second positioning mechanism has a second relative height for bearing a main board relative to the substrate, so that the small parts and the main board are staggered in height and are attached to the lower surface of the main board; the jig upper die comprises a downward pressing mechanism, and the downward pressing mechanism is located above the base plate, partially acts on the main plate in a lifting mode and is used for pressing the small parts and the main plate. The problems that in existing 3C assembly, the manual assembly precision is low, the rejection rate is high, and the production cost is increased are solved.

Description

Technical Field

[0001] The present application relates to a positioning device, and more particularly to a pre-assembled pressing fixture and a pressing method. Background Art

[0002] In the manufacturing process of 3C devices (such as mobile phones, tablets, laptops and other electronic devices), multiple parts need to be assembled. Among them, the parts of 3C devices are small and difficult to assemble manually. The parts are easy to shift during the assembly process, resulting in low assembly accuracy, affecting the quality after assembly. In addition, small parts are easy to be damaged during manual assembly, resulting in a high scrap rate and increasing manufacturing costs. Summary of the invention

[0003] The invention discloses a pre-assembled pressing jig, which solves the problems of low manual assembly precision, high scrap rate and increased production cost in the existing 3C assembly.

[0004] A pre-assembled pressing jig is used for automatic assembly of small parts and mainboards, and the pressing jig includes a jig lower die and a jig upper die that cooperate with each other; The jig lower mold comprises a base plate, the upper surface of the base plate is provided with a second positioning mechanism and a plurality of first positioning mechanisms; the first positioning mechanism has a first relative height relative to the base plate for carrying the small piece, and the second positioning mechanism has a second relative height relative to the base plate for carrying the main board, so that the small piece and the main board are staggered in height and fit the lower surface of the main board; and The upper die of the jig includes a pressing mechanism, which is located above the base plate and can be partially lifted and lowered to act on the main board for pressing the small part and the main board.

[0005] In the present application, a jig lower die and a jig upper die are used in cooperation, wherein the jig lower die assists in positioning the small parts and the main board respectively, and a first positioning mechanism of a first relative height and a second positioning mechanism of a second relative height are set, so that the small parts and the main board can be staggered in height and positioned successively, thereby replacing the traditional manual positioning method, and the two are connected by pressing down through the jig upper die.

[0006] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0007] Optionally, the pressing jig includes a base with a translation mechanism on the base, the jig upper mold is connected to the base and located on the movement path of the translation mechanism, and the jig lower mold is connected to the translation mechanism and moves with the translation mechanism.

[0008] Optionally, the first positioning mechanism comprises a small piece rough positioning module, wherein the small piece rough positioning module has a loading end for placing and carrying the small piece, and a positioning area adapted to the shape of the small piece is arranged on the loading end.

[0009] Optionally, the positioning area has relative front-to-back direction and left-to-right direction, and the first positioning mechanism also includes a small piece lateral positioning module and a small piece centering module. The loading ends of the small piece lateral positioning module and the small piece rough positioning module have a movement tendency towards each other along the front-to-back direction. The small piece centering module is arranged on both sides of the small piece rough positioning module and has a movement tendency towards each other along the left-to-right direction, and is used to drive the small pieces to move along the front-to-back direction and the left-to-right direction to fit the positioning area.

[0010] Optionally, the positioning area is provided with a plurality of vacuum ports for forming negative pressure.

[0011] Optionally, the upper die of the jig further comprises a third positioning mechanism, which can be lifted and lowered to act on the upper end of the small piece, and cooperate with the positioning area to keep the height of each small piece at the first relative height.

[0012] Optionally, the mainboard has relative front-to-back direction and left-to-right direction in the second positioning mechanism, and the second positioning mechanism includes a mainboard lateral positioning component and a mainboard side push positioning component that cooperate with each other, for positioning the mainboard in the front-to-back direction; and a mainboard centering module, for positioning the mainboard in the left-to-right direction.

[0013] Optionally, the mainboard lateral positioning component is located on one side of the mainboard in the front-to-back direction, and the mainboard side push positioning component is located on the other side of the mainboard in the front-to-back direction and pushes the mainboard toward the mainboard lateral positioning component to complete the positioning of the mainboard in the front-to-back direction.

[0014] Optionally, the mainboard sub-module includes a first pushing mechanism located on one side of the mainboard in the left and right directions, a second pushing mechanism located on the other side of the mainboard in the left and right directions, and a driving mechanism, wherein the driving mechanism acts on the first pushing mechanism and the second pushing mechanism respectively to drive the first pushing mechanism and the second pushing mechanism to move synchronously toward the mainboard.

[0015] The present application also discloses a method for pre-assembly and pressing of workpieces, including using the above-mentioned pre-assembly and pressing fixture to position and press the small parts and the main board.

[0016] The beneficial effects of this application are as follows: 1. In this application, the first positioning mechanism is used to position the small parts, and the second positioning mechanism is used to position the main board, so as to realize automatic positioning, which can effectively improve the connection accuracy between the small parts and the main board compared with manual positioning; 2. The first positioning mechanism in the present application is provided with a small-piece rough positioning module for loading small pieces, and a negative pressure vacuum port is provided at the loading end for adsorbing small pieces to prevent small pieces from falling during the movement of the first positioning mechanism, which can further reduce the defective rate caused by lack of materials; 3. The present application also provides a third positioning mechanism, which unifies the heights of the small parts by lifting them up and down, thereby reducing labor costs on the one hand and preventing the main board from interfering with the small parts during positioning, thereby preventing damage to the small parts on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the structure of the upper surface of the lower mold of the jig in this application; Figure 3 This is a schematic diagram of the structure of the lower surface of the lower mold of the jig in this application; Figure 4 This is a schematic diagram of the structure of the lower mold part of the jig in this application; Figure 5 This is a schematic diagram of the structure of the upper mold of the jig in this application; Figure 6 This is a schematic diagram of the structure of the upper mold part of the jig in this application; Figure 7 This is a schematic diagram of the structure of the upper mold part of the jig in this application; Figure 8 This is a schematic diagram of the structure of the upper mold part of the jig in this application; Fig. 9 This is a schematic diagram of the structure of the small parts in this application; Fig.10 This is a schematic diagram of the structure of the main board in this application.

[0018] The reference numerals in the figures are described as follows: 1. jig upper mold; 11. pressing mechanism; 12. third positioning mechanism; 13. upper mold base plate; 14. first movable seat; 15. heating assembly; 16. second movable seat; 2. Lower mold of fixture; 21. Base plate; 22. First positioning mechanism; 221. Small piece rough positioning module; 222. Positioning area; 223. Vacuuming port; 224. Small piece lateral positioning module; 225. Small piece centering module; 23, second positioning mechanism; 231, mainboard lateral positioning assembly; 231a, limit column; 231b, support column; 232, mainboard lateral push positioning assembly; 233, mainboard centering module; 234, first pushing mechanism; 234a, sliding seat; 234b, push block; 234c, driving inclined plane; 235, second pushing mechanism; 236, driving mechanism; 236a, driving seat; 236b, driving component; 236c, transmission rod; 3. Base; 4. Translation mechanism. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] It should be noted that the following small items such as Fig. 9 As shown in , it has a first folded edge 51 and a second folded edge 52, the first folded edge 51 is used to connect with the main board, and there is a 90° folded angle between the first folded edge 51 and the second folded edge 52; the main board is as shown in Fig.10 As shown in FIG. 1 , four connection areas for connecting the first folded edge 51 are provided on one side where the main board is connected to the small piece.

[0023] refer to Figure 1 , Figure 2 , Figure 5 A pre-assembled pressing jig is used for the automated assembly of small parts and main boards. The jig comprises a jig lower die 2 for pre-positioning the small parts and the main board, and a jig upper die 1 for pressing the small parts and the main board.

[0024] The jig lower mold 2 includes a base plate 21, the upper surface of the base plate 21 is provided with a second positioning mechanism 23 and a plurality of first positioning mechanisms 22, the first positioning mechanism 22 has a first relative height relative to the base plate 21 for carrying small parts, and the second positioning mechanism 23 has a second relative height relative to the base plate 21 for carrying the main board. When the small parts are at the first relative height and the second positioning mechanism 23 is at the second relative height, the horizontal projections of the two coincide and are staggered in the height direction, so that the two will not collide when moving at their respective heights.

[0025] The upper mold 1 of the jig includes a pressing mechanism 11, which is located above the base plate 21 and can be partially lifted and lowered to act on the main board, so that the main board is close to the small part and the two are pressed together.

[0026] like Figure 1 As shown, the jig further includes a base 3 with a translation mechanism 4 on the base 3, the jig upper die 1 is connected to the base 3 and is located on the movement path of the translation mechanism 4, the jig lower die 2 is connected to the translation mechanism 4, when the translation mechanism 4 moves, it can drive the jig lower die 2 to pass under the jig upper die 1, so that the jig lower die 2 forms a manual position away from the jig upper die 1, which is convenient for manual loading and unloading; and a pressing position located directly below the jig upper die 1, which is used to press the main board and small parts.

[0027] To position small items, refer to Figure 2 The first positioning mechanism 22 includes a small piece rough positioning module 221, which has a loading end for placing and carrying small pieces, and a positioning area 222 adapted to the shape of the small piece is provided on the loading end.

[0028] refer to Figure 2 In some embodiments, in order to ensure that the first relative height is staggered with the second relative height, a recess for accommodating the first folded edge 51 on the small piece is provided at the loading end. The positioning area 222 is located in the recess.

[0029] It can be understood that the bottom of the above-mentioned depression is the first relative height, and the protrusions formed on both sides of the depression are the second relative height, and the local height of the second positioning mechanism 23 is consistent with the height of the protrusions.

[0030] Furthermore, the first positioning mechanism 22 also includes a small piece lateral positioning module 224 and a small piece centering module 225. The positioning area 222 and the small piece have a relative front-to-back direction and a left-to-right direction, and the loading ends of the small piece lateral positioning module 224 and the small piece rough positioning module 221 have a movement tendency to approach each other along the front-to-back direction, so as to push the second folding edge 52 to fit the side of the positioning area 222; The side of the positioning area 222 is consistent with the length of the second folded edge 52. The small piece centering module 225 is arranged on both sides of the small piece rough positioning module 221 and has a movement tendency to approach each other along the left and right directions, and is used to drive the second folded edge 52 of the small piece to align with the side of the positioning area 222.

[0031] Since 3C devices are usually small in size, in order to adapt to smaller motherboards, the fixture structure is made more compact. Figure 2 and Figure 3The small piece centering module 225 includes two independent parts, which are respectively located on both sides of the small piece rough positioning module 221 and close to the small piece, and act on both sides of the second folding edge 52. Therefore, the small piece rough positioning module 221 can be divided into an action end that acts on the second folding edge 52 and a driving end that drives the action end, the driving end is arranged on the lower surface of the base plate 21, and the action end passes through the base plate 21 and extends to the upper surface of the base plate 21, saving installation space.

[0032] Similarly, the small-part lateral positioning module 224 also includes an action end and a driving end, and the driving end is disposed on the lower surface of the substrate 21. Figure 3 As shown in the figure, the positioning module 224 and the small-piece centering module 225 shown in the figure correspond to the same set of first positioning mechanisms.

[0033] Further, refer to Figure 2 In some embodiments, in order to prevent small pieces from falling off during the positioning process, the positioning area 222 is provided with a plurality of vacuum ports 223 for forming negative pressure, so as to absorb the small pieces through the negative pressure.

[0034] Combination Figure 6 and Figure 7 In some embodiments, in order to make each small piece at the same height even if the first folded edge 51 of the small piece fits with the positioning area 222, a third positioning mechanism 12 is provided on the jig upper mold 1. When the jig lower mold 2 moves to the pressing position, the third positioning mechanism 12 moves toward the jig lower mold 2 and acts on the first folded edge 51, so that the first folded edge 51 is located in the above-mentioned recess, ensuring that the small piece is at the first relative height, and eliminating the step of manually pressing the first folded edge 51 to fit with the positioning area 222.

[0035] refer to Figure 4 In some embodiments, the second positioning mechanism 23 includes a mainboard lateral positioning component 231 and a mainboard lateral push positioning component 232 that cooperate with each other, and a mainboard centering module 233 .

[0036] Among them, the mainboard has relative front-to-back direction and left-to-right direction in the second positioning mechanism 23. The mainboard lateral positioning component 231 and the mainboard side push positioning component 232 are used for positioning the mainboard in the front-to-back direction; the mainboard center module 233 is used for positioning the mainboard in the left-to-right direction.

[0037] Furthermore, the mainboard lateral positioning assembly 231 is located on one side of the mainboard in the front-to-back direction, and the mainboard lateral pushing positioning assembly 232 is located on the other side of the mainboard in the front-to-back direction and pushes the mainboard toward the mainboard lateral positioning assembly 231 to complete the positioning of the mainboard in the front-to-back direction. The mainboard lateral positioning assembly 231 includes a limiting column 231a, and when the mainboard lateral pushing positioning assembly 232 pushes the mainboard to contact the limiting column 231a, the positioning in the front-to-back direction is completed. The mainboard lateral positioning assembly 231 also includes a support column 231b, which supports the mainboard to slide and keeps the mainboard at the second relative height mentioned above.

[0038] Furthermore, the mainboard sub-module 233 includes a first pushing mechanism 234 located on one side of the mainboard in the left-right direction, a second pushing mechanism 235 located on the other side of the mainboard in the left-right direction, and a driving mechanism 236. The driving mechanism 236 acts on the first pushing mechanism 234 and the second pushing mechanism 235 respectively, driving the first pushing mechanism 234 and the second pushing mechanism 235 to move synchronously toward the mainboard.

[0039] refer to Figure 4 The first pushing mechanism 234 is movably connected to the base plate 21 in the form of a slider and a guide rail. The first pushing mechanism 234 includes a sliding seat 234a, which has a movement direction toward the main board, and a push block 234b located on the sliding seat, which acts on one side of the main board. The driving mechanism 236 includes a first driving assembly 236a, and a driving component 236b provided on the driving seat 236a. The driving component 236b acts on the side of the sliding seat 234a away from the main board, and a driving inclined surface 234c is correspondingly provided on the side of the sliding seat 234a. When the driving seat 236a drives the driving component 236b to translate, the driving component 236b pushes against the driving inclined surface 234c, forcing the sliding seat 234a to move toward the main board as a whole.

[0040] Furthermore, in order to reduce the friction force and make the pushing process between the driving component 236b and the driving inclined surface 234c smoother, the driving component 236b can adopt a circular structure such as a bearing or a wheel to convert the sliding friction into rolling friction.

[0041] It should be noted that the first pushing mechanism 234 and the second pushing mechanism 235 have the same structure. The driving seat 236a corresponding to the first pushing mechanism 234 and the driving seat 236a corresponding to the second pushing mechanism 235 are respectively connected to the two ends of the transmission rod 236c, and the transmission rod 236c is pushed by the cylinder to move synchronously.

[0042] refer to Figure 5In some embodiments, the upper mold 1 of the jig has an upper mold base plate 13, and the lower pressing mechanism 11 and the third positioning mechanism 12 are slidably connected to the upper mold base plate 13. The lower pressing mechanism 11 can be lifted and lowered to act on the main board to press the main board and the small part; the upper mold base plate 13 can be lifted and lowered to act on the small part to assist the small part to move to the first relative height, and the above two can be lifted and lowered independently.

[0043] refer to Figure 6 and Figure 7 The upper mold base plate 13 is provided with a first movable seat 14 , and the first movable seat 14 is used to connect and drive the pressing mechanism 11 and the third positioning mechanism 12 to move synchronously on the upper mold base plate 13 .

[0044] refer to Figure 8 In some embodiments, the upper mold 1 of the jig is also provided with a liftable heating component 15 and a second movable seat 16 for driving the heating component 15 to move on the upper mold substrate 13. The heating component 15 is used for the main board and the small parts. A connecting material, such as tin or heat-sensitive glue, is provided at the connection between some main boards and small parts, and the two can be connected by heating through the heating component 15.

[0045] In one embodiment of the present application, a method for pre-assembly and pressing of workpieces is also disclosed, and the pre-assembly and pressing fixture is used to position and press the small parts and the main board.

[0046] Specifically, the steps include placing the small component into the first positioning mechanism 22 and cooperating with the third positioning mechanism 12 for positioning; placing the main board into the second positioning mechanism 23 for positioning; and operating the pressing mechanism 11 to press the main board and the small component together.

[0047] Optionally, the motion heating component 15 heats the main board and small parts having the connecting material.

[0048] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0049] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A pre-assembled pressing jig for automatic assembly of small parts and mainboards, characterized in that: The pressing jig comprises a jig lower die (2) and a jig upper die (1) which cooperate with each other; The jig lower mold (2) comprises a base plate (21), the upper surface of the base plate (21) being provided with a second positioning mechanism (23) and a plurality of groups of first positioning mechanisms (22); the first positioning mechanism (22) has a first relative height relative to the base plate (21) for carrying small parts, and the second positioning mechanism (23) has a second relative height relative to the base plate (21) for carrying a main board, so that the small parts and the main board are staggered in height and fit the lower surface of the main board; and The jig upper die (1) comprises a pressing mechanism (11), the pressing mechanism (11) being located above the base plate (21) and partially movable upward and downward to act on the main plate, and being used for pressing the small component and the main plate together.

2. A pre-assembled pressing jig according to claim 1, characterized in that: The pressing jig comprises a base (3), the base (3) being provided with a translation mechanism (4), the jig upper die (1) being connected to the base (3) and being located on a movement path of the translation mechanism (4), and the jig lower die (2) being connected to the translation mechanism (4) and moving with the translation mechanism (4).

3. A pre-assembled pressing jig according to claim 2, characterized in that: The first positioning mechanism (22) comprises a small piece rough positioning module (221), the small piece rough positioning module (221) having a loading end for placing and carrying the small piece, and a positioning area (222) adapted to the shape of the small piece is provided on the loading end.

4. A pre-assembled pressing jig according to claim 3, characterized in that: The positioning area (222) has a relative front-to-back direction and a left-to-right direction. The first positioning mechanism (22) further comprises a small-piece lateral positioning module (224) and a small-piece centering module (225). The loading ends of the small-piece lateral positioning module (224) and the small-piece rough positioning module (221) have a tendency to move toward each other along the front-to-back direction. The small-piece centering module (225) is arranged on both sides of the small-piece rough positioning module (221) and has a tendency to move toward each other along the left-to-right direction, and is used to drive the small piece to move along the front-to-back direction and the left-to-right direction to fit the positioning area (222).

5. The pre-assembled pressing jig according to claim 3, characterized in that: The positioning area (222) is provided with a plurality of vacuum ports (223) for forming negative pressure.

6. The pre-assembled pressing jig according to claim 2, characterized in that: The jig upper die (1) further comprises a third positioning mechanism (12), wherein the third positioning mechanism (12) can be raised and lowered to act on the upper end of the small piece, and cooperate with the positioning area (222) to keep the height of each small piece at the first relative height.

7. The pre-assembled pressing jig according to claim 2, characterized in that: The mainboard has a relative front-to-back direction and left-to-right direction in the second positioning mechanism (23), and the second positioning mechanism (23) comprises a mainboard lateral positioning component (231) and a mainboard side-pushing positioning component (232) that cooperate with each other and are used for positioning the mainboard in the front-to-back direction; and a mainboard centering module (233) that is used for positioning the mainboard in the left-to-right direction.

8. The pre-assembled pressing jig according to claim 7, characterized in that: The mainboard lateral positioning component (231) is located on one side of the mainboard in the front-rear direction, and the mainboard lateral pushing positioning component (232) is located on the other side of the mainboard in the front-rear direction and pushes the mainboard toward the mainboard lateral positioning component (231) to complete the positioning of the mainboard in the front-rear direction.

9. The pre-assembled pressing jig according to claim 8, characterized in that: The mainboard sub-module (233) comprises a first pushing mechanism (234) located on one side of the mainboard in the left-right direction, a second pushing mechanism (235) located on the other side of the mainboard in the left-right direction, and a driving mechanism (236), wherein the driving mechanism (236) acts on the first pushing mechanism (234) and the second pushing mechanism (235) respectively, driving the first pushing mechanism (234) and the second pushing mechanism (235) to move synchronously toward the mainboard.

10. A method for pre-assembling and pressing a workpiece, characterized in that: The method comprises using any one of the pre-assembled pressing jigs in claims 1 to 9 to position and press the small part and the main board.

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