A drill jig for positioning thin-walled cover mounting holes and a processing method

Abstract

The application discloses a drilling jig for positioning a thin-wall cover mounting hole and a processing method, comprising a positioning assembly and a drilling die assembly, the drilling die assembly is sleeved on the positioning assembly, the cover is mounted between the positioning assembly and the drilling die assembly, and the positioning assembly cooperates with the drilling die assembly to accurately guide and position drilling of the cover; profiling positioning is performed on the cover, so that the problem of inaccurate positioning caused by shape deviation of the cover is solved, the processing precision and consistency of the cover mounting hole are effectively improved, and the quality guarantee in batch production is achieved.

Description

Technical Field

[0001] This invention relates to the field of machining fixture technology, specifically to a drilling fixture and machining method for locating mounting holes for thin-walled outer covers. Background Technology

[0002] Reference Figure 1 and Figure 2 The outer cover is a thin-walled aluminum alloy shell, which is composed of two separate outer cover parts. The upper edge of each of the two outer cover parts is provided with mounting holes, and one of the side wall edges of each of the two outer cover parts is also provided with mounting holes. The assembly of the outer cover is achieved by connecting the mounting holes on the edges of the two outer cover parts together. In traditional processing methods, the mounting holes of the outer cover are mostly drilled directly after scribing or drilled on a machining center by clamping with a vise.

[0003] The above method will have the following problems: (1) The outer cover is prone to elastic deformation when clamped, which will cause the hole to rebound after drilling and cause hole position deviation; (2) Different batches of products have different external dimensions, and it is difficult to adapt and adjust using fixed positioning, resulting in inconsistent positioning reference; (3) There is a lack of precise guidance during multi-hole processing, and the drill bit is prone to deflection, resulting in the installation hole position deviation exceeding the tolerance, affecting the interchangeability of subsequent panel assembly. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a drilling fixture and processing method for locating mounting holes for thin-walled outer covers.

[0005] The present invention is achieved through the following technical solutions.

[0006] The technical solution of the present invention: A drilling jig for positioning mounting holes of thin-walled outer cover, comprising a positioning component and a drilling jig component, wherein the drilling jig component is sleeved on the positioning component, and the outer cover is installed between the positioning component and the drilling jig component, and the positioning component cooperates with the drilling jig component to accurately guide and position the drilling of the outer cover.

[0007] Preferably, the drill jig assembly includes a drill template and a drill sleeve. A plurality of first mounting holes are provided at the edge of the upper end face of the drill template, and a second mounting hole is provided on one side wall of the drill template. A drill sleeve is installed in both the first mounting holes and the second mounting hole.

[0008] Preferably, the drill bushing is detachable.

[0009] Preferably, the middle position of the upper surface of the drilling template is hollowed out.

[0010] Preferably, the positioning assembly includes a positioning plate, a sealing plate, an air pipe connector, an air pipe, and a vacuum generator. The top wall of the inner cavity of the positioning plate and the two adjacent side walls are all equipped with sealing plates. The air pipe connector is installed on the sealing plate and is connected to the outer surface of the corresponding area of ​​the positioning plate. The air pipe connector is connected to the air pipe, and the air pipe is connected to the vacuum generator.

[0011] Preferably, the top wall and side walls of the positioning plate on the side back of the sealing plate are respectively provided with a first adsorption area, a second adsorption area and a third adsorption area, and each of the first adsorption area, the second adsorption area and the third adsorption area is provided with multiple vacuum suction holes, which are connected to the air pipe connector.

[0012] Preferably, a first sealing ring is installed around the periphery of the first adsorption region, the second adsorption region, and the third adsorption region.

[0013] Preferably, a second sealing ring is provided on the side of the sealing plate that is in contact with the positioning plate.

[0014] In another aspect, the present invention provides a method for machining mounting holes for thin-walled outer covers, characterized by comprising the following steps: S1: Drilling fixture preparation; Install the drilling fixture on the machine and level it, and check whether the vacuum suction hole is unobstructed. S2: Outer cover placement; Place the outer cover to be processed with its opening facing down on the positioning plate, so that the bottom and sides of the outer cover are completely in contact with the contour surface of the positioning plate, and then fit the drilling template on the outer cover. S3: Vacuum adsorption; Start the vacuum generator to apply uniform negative pressure to the inner wall of the outer cover by drawing a vacuum, so that the outer cover is tightly adsorbed onto the positioning plate. S4: Drilling; Align the drill spindle with the drill bushings on the drill template, and insert the drill bits into each drill bushing in sequence for drilling. S5: Unloading; After processing, remove the drill template, turn off the vacuum generator, release the adsorption, remove the outer cover product, and the processing is complete.

[0015] The beneficial effects of this invention are as follows: 1. By cooperating with the drilling template and the positioning plate, the outer cover is positioned in a contour-following manner to solve the problem of inaccurate positioning caused by the deviation of the outer cover shape, which effectively improves the processing accuracy and consistency of the outer cover mounting holes and is suitable for quality assurance in mass production. 2. By using vacuum adsorption, the outer cover wall is tightly attached to the positioning plate, avoiding clamping deformation of the outer cover during processing; 3. By detachably installing a drill bushing on the drill template, the problem of drilling position deviation is solved by guiding the drill bushing, avoiding excessive tolerance in the position of the mounting hole, and thus avoiding affecting the interchangeability of subsequent panel assembly; 4. Drill bushings of corresponding sizes can be replaced according to the external dimensions of different batches of products with different hole diameters, making it suitable for positioning and clamping of different batches of products with different hole diameters. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the outer cover in this invention; Figure 2 This is an exploded structural diagram of the outer cover in this invention; Figure 3 This is a schematic diagram of the structure of the present invention; Figure 4 This is a schematic diagram of the outer cover being assembled on the positioning plate in this invention; Figure 5 This is a schematic diagram of the positioning plate in this invention; Figure 6 This is a structural schematic diagram of the outer cover being assembled on the positioning plate from another perspective in this invention; Figure 7 This is a schematic diagram of the sealing plate in this invention.

[0017] Reference numerals: 1-Drill template; 2-Drill sleeve; 3-First mounting hole; 4-Second mounting hole; 5-Positioning plate; 6-Sealing plate; 7-Air pipe connector; 8-First adsorption area; 9-Second adsorption area; 10-Third adsorption area; 11-Vacuum suction hole; 12-Vacuum suction groove; 13-First sealing ring; 14-Second sealing ring; 15-Outer cover. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0020] In this embodiment, refer to Figure 3 It includes a positioning component and a drilling jig component. The drilling jig component is fitted onto the positioning component, and the outer cover 15 is installed between the positioning component and the drilling jig component. The positioning component works with the drilling jig component to precisely guide and position the drilling of the outer cover 15.

[0021] In this embodiment, refer to Figure 3 The drilling jig assembly includes a drilling template 1 and a drilling sleeve 2. The drilling template 1 is frame-shaped, and the middle position of the upper surface of the drilling template 1 is hollowed out to facilitate the positioning of the drilling template 1 on the outer cover 15, while making the overall structure lighter.

[0022] The drill template 1 is fitted onto the outer cover 15. Multiple first mounting holes 3 are provided at the edge of the upper end face of the drill template 1, and the multiple first mounting holes 3 correspond one-to-one with the drilling positions on the upper end face of the outer cover 15. Multiple second mounting holes 4 are provided on one side wall of the drill template 1, and the multiple second mounting holes 4 correspond one-to-one with the drilling positions on the side wall of the outer cover 15. Drill sleeves 2 can be detachably installed in both the first mounting holes 3 and the second mounting holes 4, and drill sleeves 2 with different hole diameters can be replaced, which is suitable for outer covers 15 with different mounting hole diameters.

[0023] In this embodiment, refer to Figure 4 , Figure 5 and Figure 6 The positioning assembly includes a positioning plate 5, a sealing plate 6, an air pipe connector 7, an air pipe, and a vacuum generator. The air pipe and vacuum generator are not shown in the figure. The positioning plate 5 is frame-shaped, with a through-hole design on its lower end. Sealing plates 6 are installed on the top wall and two adjacent side walls of the inner cavity of the positioning plate 5. The sealing plates 6 are fixedly installed in the inner cavity of the positioning plate 5 with bolts. The air pipe connector 7 is installed on the sealing plate 6 and communicates with the outer surface of the corresponding area of ​​the positioning plate 5. The air pipe connector 7 communicates with the air pipe, which in turn communicates with the vacuum generator. The sealing plate 6 achieves a seal between the positioning plate 5, the air pipe, and the vacuum generator.

[0024] In this embodiment, refer to Figure 5 and Figure 6 The top and side walls of the positioning plate 5, which are against the sealing plate 6, are respectively provided with a first adsorption area 8, a second adsorption area 9, and a third adsorption area 10. Each of the first adsorption area 8, the second adsorption area 9, and the third adsorption area 10 is provided with a plurality of vacuum suction holes 11, which are connected to the air pipe connector 7. The first adsorption area 8, the second adsorption area 9, and the third adsorption area 10 are provided with a plurality of vacuum suction grooves 12, which are arranged in a flow-through manner. The vacuum suction grooves 12 are also connected to the vacuum suction holes 11, and the vacuum suction holes 11 are surrounded by the plurality of vacuum suction grooves 12, so as to realize the airflow communication between the vacuum suction holes 11 and the vacuum suction grooves 12 in each adsorption area.

[0025] The outer cover 15 is fitted onto the positioning plate 5. The top wall of the inner cavity of the outer cover 15 is in contact with the first adsorption area 8, and the two side walls of the inner cavity of the outer cover 15 are in contact with the second adsorption area 9 and the third adsorption area 10, respectively. Adsorption is achieved through a vacuum generator and connected to the air pipe connector 7 through an air pipe. This allows the vacuum generator to adsorb the first adsorption area 8, the second adsorption area 9, and the third adsorption area 10, creating a vacuum and generating negative pressure. This causes the bottom surface of the outer cover 15 to be evenly adsorbed onto the positioning plate 5, forming a flexible compression. This ensures that the inner wall of the outer cover 15 is tightly fitted onto the positioning plate 5, preventing the outer cover 15 from being deformed during processing.

[0026] In this embodiment, refer to Figure 5 A first sealing ring 13 is installed around the first adsorption region 8, the second adsorption region 9 and the third adsorption region 10, which helps to strengthen the sealing between the side wall of the positioning plate 5 and the first adsorption region 8, the second adsorption region 9 and the third adsorption region 10, thereby helping the vacuum generator to perform vacuum adsorption.

[0027] In this embodiment, refer to Figure 6 and Figure 7 A second sealing ring 14 is provided on the side of the sealing plate 6 that is in contact with the positioning plate 5, which helps to enhance the sealing between the sealing plate 6 and the side wall of the positioning plate 5.

[0028] The working principle of this invention is as follows: By fitting the outer cover 15 onto the positioning plate 5, and then fitting the drill template 1 onto the outer cover 15, a vacuum generator is used to tightly adsorb the side wall of the positioning plate 5, and a vacuum is drawn to generate negative pressure, so that the bottom surface of the outer cover 15 is evenly adsorbed onto the positioning plate 5, forming a flexible compression, which avoids the local stress concentration and thin-wall deformation caused by traditional mechanical pressing plates; at the same time, the drill sleeve 2 guides and positions the drilling position, and performs contour positioning of the outer cover 15 to solve the problem of inaccurate positioning caused by the shape deviation of the outer cover 15, effectively improving the processing accuracy and consistency of the mounting holes of the outer cover 15.

[0029] A preferred embodiment of the present invention also provides a method for machining mounting holes for thin-walled outer covers, characterized by comprising the following steps: S1: Drilling fixture preparation; Install the drilling fixture on the machine and level it, and check whether the vacuum suction hole 11 is unobstructed.

[0030] S2: Placement of outer cover 15; Place the outer cover 15 to be processed with its opening facing down on the positioning plate 5, so that the bottom and sides of the outer cover 15 are completely in contact with the contouring surface of the positioning plate 5, and fit the drilling template 1 on the outer cover 15; to achieve contouring positioning of the outer cover 15.

[0031] S3: Vacuum adsorption; Start the vacuum generator and apply uniform negative pressure to the inner wall of the outer cover 15 by drawing a vacuum, so that the outer cover 15 is tightly adsorbed on the positioning plate 5. At this time, the small elastic deformation of the thin wall of the outer cover 15 is evenly dispersed and will not cause local warping.

[0032] S4: Drilling; Align the drill spindle with the drill sleeve 2 on the drill template 1, and insert the drill bit into each drill sleeve 2 in sequence for drilling; Due to the guiding effect of the drill sleeve 2, the drill bit will not deviate, ensuring that the position of the mounting hole meets the requirements.

[0033] S5: Unloading; After processing is completed, remove the drill template 1, turn off the vacuum generator, release the adsorption, remove the outer cover 15 product, and the processing is complete.

[0034] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A drilling fixture for locating mounting holes for thin-walled outer covers, characterized in that: It includes a positioning component and a drilling jig component. The drilling jig component is fitted onto the positioning component, and the outer cover (15) is installed between the positioning component and the drilling jig component. The positioning component works with the drilling jig component to precisely guide and position the drilling of the outer cover (15).

2. The drilling fixture for locating mounting holes for thin-walled outer covers according to claim 1, characterized in that: The drill jig assembly includes a drill template (1) and a drill sleeve (2). Multiple first mounting holes (3) are provided at the edge of the upper end face of the drill template (1). A second mounting hole (4) is provided on the side wall of one side of the drill template (1). Drill sleeves (2) are installed in both the first mounting holes (3) and the second mounting holes (4).

3. The drilling fixture for locating mounting holes for thin-walled outer covers according to claim 2, characterized in that: The drill bushing (2) is detachable.

4. The drilling fixture for locating mounting holes for thin-walled outer covers according to claim 2, characterized in that: The upper surface of the drill template (1) is hollowed out at the middle position.

5. The drilling fixture for locating mounting holes for thin-walled outer covers according to claim 1, characterized in that: The positioning assembly includes a positioning plate (5), a sealing plate (6), an air pipe connector (7), an air pipe, and a vacuum generator. The top wall of the inner cavity of the positioning plate (5) and the two adjacent side walls are all equipped with sealing plates (6). The air pipe connector (7) is installed on the sealing plate (6) and is connected to the outer surface of the corresponding area of ​​the positioning plate (5). The air pipe connector (7) is connected to the air pipe, and the air pipe is connected to the vacuum generator.

6. The drilling fixture for locating mounting holes for thin-walled outer covers according to claim 5, characterized in that: The top and side walls of the positioning plate (5) backing the sealing plate (6) are respectively provided with a first adsorption area (8), a second adsorption area (9) and a third adsorption area (10). The first adsorption area (8), the second adsorption area (9) and the third adsorption area (10) are each provided with a plurality of vacuum suction holes (11), and the vacuum suction holes (11) are connected to the air pipe connector (7).

7. The drilling fixture for locating mounting holes for thin-walled outer covers according to claim 6, characterized in that: Multiple vacuum suction grooves (12) are provided on the first adsorption region (8), the second adsorption region (9) and the third adsorption region (10). The multiple vacuum suction grooves (12) are arranged in a flow-through manner, and the vacuum suction grooves (12) are also connected to the vacuum suction holes (11).

8. The drilling fixture for locating mounting holes for thin-walled outer covers according to claim 6, characterized in that: A first sealing ring (13) is installed around the first adsorption region (8), the second adsorption region (9) and the third adsorption region (10).

9. The drilling fixture for locating mounting holes for thin-walled outer covers according to claim 5, characterized in that: The sealing plate (6) is provided with a second sealing ring (14) on one side that fits against the positioning plate (5).

10. A method for machining mounting holes for thin-walled outer covers, characterized in that, Includes the following steps: S1: Drilling fixture preparation; Install the drilling fixture on the machine and level it, and check whether the vacuum suction hole (11) is unobstructed; S2: Placement of outer cover (15); Place the outer cover (15) to be processed with its opening facing down on the positioning plate (5) so that the bottom and side surfaces of the outer cover (15) are completely in contact with the contour surface of the positioning plate (5), and set the drilling template (1) on the outer cover (15). S3: Vacuum adsorption; Start the vacuum generator and apply a uniform negative pressure to the inner wall of the outer cover (15) by drawing a vacuum, so that the outer cover (15) is tightly adsorbed on the positioning plate (5); S4: Drilling; Align the drill spindle with the drill sleeve (2) on the drill template (1), and insert the drill bit into each drill sleeve (2) in sequence for drilling; S5: Unloading; After processing, remove the drill template (1), turn off the vacuum generator, release the adsorption, remove the outer cover (15) of the product, and the processing is complete.

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