A bushing device and method for ensuring coaxiality of a closure area cover or skin to a skeletal guide hole

Abstract

The present application relates to the technical field of aircraft design and manufacturing, and particularly relates to a hole guiding device and method for coaxiality of a closed cover or skin and a skeleton guide hole, which comprises a positioning hole guide and a flexible mounting plate, wherein the positioning hole guide is composed of an upper mounting plate of the hole guide and a lower mounting plate of the hole guide, one end of the upper mounting plate of the hole guide is provided with a positioning device, one end of the lower mounting plate of the hole guide is provided with a detachable bushing, one side of the lower mounting plate of the hole guide is provided with a limiting device, and the flexible mounting plate is connected between the upper mounting plate of the positioning hole guide and the lower mounting plate of the hole guide, the present application provides the hole guiding device and method for coaxiality of a closed cover or skin and a skeleton guide hole, through sliding between the positioning hole guide and the flexible mounting plate, through adjustment, the closed hole position guiding can be suitable for various outer covers, the present application can realize rapid positioning without manual measurement and marking, and after hole positioning is completed, the hole guide assembly can be taken down together with the cover (or skin) to perform hole making operation conveniently.

Description

Technical Field

[0001] This invention relates to the field of aircraft design and manufacturing technology, and in particular to a hole-guiding device and method for ensuring the coaxiality of the guide holes of the enclosure or skin with the skeleton. Background Technology

[0002] In the daily operation and maintenance of aircraft, various access panels are installed on the fuselage surfaces near these devices to facilitate inspection, repair, and replacement by maintenance personnel. These access panels are bolted to the fuselage, and after prolonged flight, both the fuselage and the access panels undergo some degree of deformation. When an access panel no longer meets operational requirements, it needs to be replaced. However, at this point, the bolt holes of the access panel manufactured according to the design drawings no longer match the actual hole positions on the fuselage. Therefore, after adjusting the gap between the access panel and the fuselage, it is necessary to trace the hole positions of the access panel using the actual hole positions on the fuselage. When the access panel covers the fuselage, it creates a sealed space, making it impossible for operators to perform tracing operations from inside the fuselage. Therefore, replacing the access panels becomes difficult or impossible. In drilling holes for aircraft hatches and skin parts, operators need to transfer the original mounting holes on the frame to the new hatches or skin. Currently, drilling work relies heavily on manual marking. For enclosed areas, it is difficult for operators to quickly determine the original mounting hole positions on the hatches and skin, resulting in high drilling risks and difficulty in ensuring drilling accuracy. Summary of the Invention

[0003] The purpose of this invention is to address the problems of high drilling risk, difficulty in ensuring accuracy, and difficulty in operating in enclosed areas in existing technologies, by providing a drilling device and method to ensure the coaxiality of the guide hole between the cap or skin in the enclosed area and the skeleton.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A hole-reaming device for ensuring the coaxiality of the cap or skin of the enclosed area with the guide hole of the skeleton includes a positioning hole-reaming device and a flexible mounting plate. The flexible mounting plate is a rectangular plate with a certain degree of toughness, which facilitates the increase of component stability and ensures that the positioning hole-reaming device can bend to follow the shape of the cap. The flexible mounting plate has a groove in the middle to facilitate the sliding of the positioning hole-reaming device in the groove of the flexible mounting plate. The positioning hole-reaming device is composed of an upper mounting plate and a lower mounting plate connected to the hole-reaming device. One end of the upper mounting plate is connected to a positioning device for positioning during hole-reaming. One end of the lower mounting plate is connected to a removable hole-reaming bushing. A limit device is provided on one side of the lower mounting plate to ensure that the edge distance of the hole is consistent with the frame. The flexible mounting plate is connected between the upper mounting plate and the lower mounting plate.

[0005] This invention relates to a hole-guiding device for ensuring the coaxiality of the guide holes of the cover or skin in a closed area with the skeleton. The device is composed of a positioning hole-guiding device and a flexible mounting plate. The flexible mounting plate is a rectangular strip with a certain degree of toughness. After being installed with the positioning hole-guiding device, it can guide holes in various situations according to different site conditions. The flexible mounting plate also has a groove in the middle for connecting the positioning hole-guiding device, so that the positioning hole-guiding device can be manually adjusted to realize hole guiding in the closed area of ​​the cover and skin with various shapes.

[0006] This invention relates to a hole-guiding device for ensuring the coaxiality of the cap or skin in a closed area with the guide hole in the skeleton. It achieves hole-guiding of the closed area of ​​the cap and skin with various shapes such as straight lines, arcs, and sawtooth by connecting the positioning hole-guiding device with the flexible mounting plate. By placing the edge of the cap or skin into the positioning hole-guiding device and placing it close to the limiting device inside the positioning hole-guiding device, the edge distance of the cap (or skin) to be guided can be quickly and accurately located without scribing or manual measurement.

[0007] The coaxiality of the aforementioned cap or skin with the skeleton guide hole is essentially the coaxiality of the cap with the skeleton guide hole and the skin with the skeleton guide hole.

[0008] In a preferred embodiment of the present invention, the upper mounting plate of the hole drill is a rigid integral piece. One end of the upper mounting plate is square for connecting to the positioning device, and the other end is long and rectangular. The long and rectangular end of the upper mounting plate is made of inwardly rolled channel steel, and an upper mounting plate slot, a connecting hole, and an upper mounting plate square slot are sequentially provided from the long and rectangular end of the upper mounting plate to the end near the square end of the upper mounting plate for subsequent connection with the lower mounting plate of the hole drill. The upper surface of the square end of the upper mounting plate is provided with an internal thread for cooperating with the positioning device.

[0009] As a preferred embodiment of the present invention, the positioning device body is a positioning head and the positioning head is detachable for easy replacement. The detachable positioning head is composed of a first positioning head component and a second positioning head component. The diameter of the first positioning head component is smaller than the diameter of the second positioning head component, and the first positioning head component is coaxially mounted on the upper end face of the second positioning head component. The detachable positioning head is provided with an external thread, which can be threaded to cooperate with the internal thread provided on the square end of the upper mounting plate.

[0010] As a preferred embodiment of the present invention, the lower mounting plate of the aforementioned hole-reamer is composed of a square end and a long rectangular end. The lower mounting plate of the aforementioned hole-reamer has a groove at one end of the rectangular end that corresponds to the groove of the upper mounting plate of the hole-reamer, so that the two mounting plates can be connected into a whole. The lower mounting plate of the aforementioned hole-reamer also has a hole in the middle that is the same as that of the upper mounting plate of the hole-reamer, so that the two mounting plates can be connected into a whole. The square end of the aforementioned lower mounting plate has an internal thread for engaging with a detachable hole-reamer bushing.

[0011] As a preferred embodiment of the present invention, the detachable bushing is composed of a first bushing component and a second bushing component, wherein the diameter of the first bushing component is smaller than the diameter of the second bushing component, the first bushing is coaxially connected to the upper end face of the second bushing, and the detachable pre-hole bushing is provided with an external thread for connecting with the internal thread provided on the square end of the lower mounting plate.

[0012] As a preferred embodiment of the present invention, the upper mounting plate slot, lower mounting plate slot, and connecting hole respectively opened on the upper mounting plate and the lower mounting plate of the aforementioned hole-reamer are sequentially aligned. After the slots and holes are respectively set at the slots and holes opened on the upper mounting plate of the aforementioned hole-reamer, and several fastening nuts are correspondingly set on the lower mounting plate of the aforementioned hole-reamer, the upper mounting plate and the lower mounting plate of the aforementioned hole-reamer are connected into a rigid whole by the cooperation of the square bolts and the fastening nuts. A washer is provided between the square bolts and the fastening nuts at the slots, mainly for selecting a suitable washer according to the thickness of the cap and installing it between the positioning upper mounting plate and the positioning lower mounting plate of the hole-reamer to ensure that the subsequent hole-reamer can be installed on the cap.

[0013] As a preferred embodiment of the present invention, the lower mounting plate of the aforementioned hole guide has a lower mounting plate scale line on the side near the square end, so that the length and position of the limit can be clearly observed when using the limiting device.

[0014] As a preferred embodiment of the present invention, the limiting device is a sliding limiting block, which is composed of a rectangular slider, a limiting baffle, and a limiting block tightening nut. The upper end face of the rectangular slider is provided with a handle for easy pushing. The limiting baffle is L-shaped and the end face is provided with a threaded hole for installing the limiting block tightening bolt. The limiting device is fixed to the side of the positioning guide hole near the square end by the limiting block tightening nut, which is used to limit the sliding position and distance.

[0015] The method for ensuring the coaxiality of the cap or skin with the skeleton guide hole is as follows: Step 1. Assemble the above devices into a flexible hole drill for easy subsequent hole drilling; Step 2. Install the assembled flexible hole drill assembly onto the mouth frame or skin, adjust its position and begin drilling, ensuring fast and accurate drilling; Step 3. After positioning, the flexible hole-making device assembly is fixed on the cap. Remove the cap from the machine to perform the hole-making operation. Step 4. After the hole is made, loosen the removable hole bushing and remove the flexible hole generator assembly from the cap. Then, perform subsequent countersinking and other work as required. The hole making work is now complete.

[0016] The method for ensuring the coaxiality of the sealing cap or skin with the skeleton guide hole is to connect and position the assembled flexible hole drill to the sealing cap or skin before starting the hole drilling, which ensures the accuracy of the hole position and makes subsequent hole drilling work more convenient.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention provides a hole-guiding device and method for ensuring the coaxiality of the cap or skin in the closed area with the guide hole of the skeleton. It is applicable to hole-guiding of the closed area of ​​caps (or skins) with various shapes such as straight lines, arcs, and sawtooth.

[0018] 2. The present invention is a hole-guiding device and method for ensuring the coaxiality of the cap or skin of the closed area with the guide hole of the skeleton. It can quickly and accurately locate the edge distance of the cap (or skin) where the hole needs to be guided, without the need for scribing and manual measurement.

[0019] 3. The present invention is a hole-making device and method for ensuring the coaxiality of the cap or skin of the closed area with the guide hole of the skeleton. After the hole is positioned, the hole-making device assembly can be removed together with the cap (or skin) for hole making, which is convenient to operate.

[0020] 4. The present invention is a hole-guiding device and hole-guiding method for ensuring the coaxiality of the cover or skin of the closed area with the guide hole of the skeleton. The positioning head has various specifications and can be replaced as needed.

[0021] 5. The pilot hole bushing is available in various specifications and can be replaced during the hole making process, while also ensuring the perpendicularity of the hole. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural diagram of a flexible aperture device; Figure 3 This is a schematic diagram of the positioning aperture device structure; Figure 4 This is an exploded view of the positioning aperture (100) structure; Figure 5 This is a schematic diagram of the mounting plate on the positioning hole drill bit; Figure 6 This is a schematic diagram of the lower mounting plate of the positioning hole drill; Figure 7 This is a schematic diagram of a detachable positioning head; Figure 8 This is a schematic diagram of a detachable pilot hole bushing; Figure 9 This is a schematic diagram of the sliding limit block; Figure 10 This is a schematic diagram of tightening the bolts on the limit block; Figure 11 This is a schematic diagram of the sliding limit block's operation; Figure 12 This is a schematic diagram of a flexible mounting plate; Figure 13 This is a schematic diagram of the aperture assembly; Figure 14 This is a schematic diagram of the positioning head being inserted into the hole. Figure 15 This is a schematic diagram of the cap being inserted into the positioning guide hole. Figure 16 This is a schematic diagram of the limiting principle of the sliding limit block; Figure 17 This is a schematic diagram of drilling without removing the detachable positioning head; Figure 18 This is a schematic diagram of drilling to remove the detachable positioning head; Figure 19 This is a flowchart of the hole-making method.

[0023] Icons: 100 - Positioning pilot hole device; 110 - Removable positioning head; 113 - First positioning head component; 114 - Second positioning head component; 120 - Sliding limit block; 130 - Square head bolt; 140 - Upper mounting plate of positioning pilot hole device; 140a - Square end of upper mounting plate; 140b - Rectangular end of upper mounting plate; 150 - Washer; 160 - Lower mounting plate of positioning pilot hole device; 160a - Square end of lower mounting plate; 160b - Rectangular end of lower mounting plate; 170 - Fastening nut; 180 - Limit block tightening bolt; 190 - Removable pilot hole bushing; 200 - Flexible mounting plate; 111 - Positioning head positioning reference surface; 112 - Positioning head external thread surface; 121 - Limit block tightening bolt 122-Threaded mounting hole; 123-Rectangular slider; 124-Limit stop; 141-Handle; 142-Upper mounting plate slot; 143-Upper mounting square slot; 161-Lower mounting plate slot; 162-Lower mounting plate internal thread; 163-Lower mounting plate scale; 181-Limit block tightening bolt external thread; 191-Piston bushing external thread; 192-Piston bushing through hole; 193-First bushing component; 194-Second bushing component; 201-Flexible mounting plate slot. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings.

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example 1

[0026] like Figure 1-4 The hole-guiding device shown is used to ensure the coaxiality of the guide hole between the cover or skin of the closed area and the skeleton. It includes a positioning hole-guiding device 100 and a flexible mounting plate 200. The flexible mounting plate 200 is a rectangular strip with a certain degree of toughness, and a groove is opened in the middle of the flexible mounting plate 200 for the sliding of the positioning hole-guiding device 100. The positioning hole-guiding device 100 is composed of an upper mounting plate 140 and a lower mounting plate 160 connected together to form a rigid whole. One end of the upper mounting plate 140 is connected to a positioning device 110 for positioning during hole guiding. One end of the lower mounting plate 160 is connected to a detachable hole-guiding bushing 190. A limiting device is provided on one side of the lower mounting plate to ensure that the edge distance of the guided hole is consistent with the frame. The flexible mounting plate 200 is connected between the upper mounting plate 140 and the lower mounting plate 160, so that the positioning hole-guiding device 100 and the flexible mounting plate 200 can be connected as a whole.

[0027] like Figure 5-6 As shown, the above-mentioned upper mounting plate 140 of the hole guide is composed of an upper mounting plate square end 140a and an upper mounting plate long rectangular end 140b. The upper end of the upper mounting plate square end 140a is connected to the above-mentioned positioning device 110, and the upper mounting plate long rectangular end 140b is an inwardly rolled channel steel. The upper mounting plate long rectangular end 140b has an upper mounting plate slot, a connecting hole, and a square slot in sequence from one end to the end near the upper mounting plate square end 140a, which facilitates the connection of the upper mounting plate. The upper mounting plate square end 140a has an upper mounting plate internal thread 142, which makes the connection between the positioning device 110 and the upper mounting plate square end 140a more stable.

[0028] like Figure 7 As shown, the aforementioned positioning head 110 is a detachable positioning head 110, which is composed of a first positioning head component 113 and a second positioning head component 114. The first positioning head component 113 and the second positioning head component 114 are coaxially connected, and the first positioning head component 113 is directly smaller than the second positioning head component 114. The detachable positioning head 110 is provided with a positioning head external thread surface 112, which connects to the upper mounting plate internal thread opening 142 provided at the square end of the upper mounting plate 140 of the hole drill.

[0029] like Figure 5-6As shown, the lower mounting plate 160 of the aforementioned hole drill is composed of a square end 160a and a long rectangular end 160b of the lower mounting plate. The long rectangular end 160b of the lower mounting plate is provided with a lower mounting plate slot 161 and a connecting hole corresponding to the upper mounting plate slot 141 and the connecting hole, so as to correspond with the upper mounting plate 140 of the aforementioned hole drill and make the upper mounting plate 140 of the hole drill and the lower mounting plate 160 of the hole drill form a whole.

[0030] like Figure 8 As shown, the aforementioned detachable pilot hole bushing 190 is a detachable pilot hole bushing, which is composed of a first bushing component 193 and a second bushing component 194. The first bushing component 193 and the second bushing component 194 are coaxially connected, and the bottom of the first bushing component 193 is connected to the upper end face of the second bushing component 194. The detachable pilot hole bushing 190 is provided with an external thread 191, which connects to the internal thread 162 of the lower mounting plate provided at the square end of the lower mounting plate 160 of the pilot hole device, making the connection between the detachable bushing 193 and the square end 160a of the lower mounting plate more stable.

[0031] like Figure 3-4 As shown, the upper mounting plate 140 and lower mounting plate 160 of the aforementioned hole drill are respectively provided with corresponding upper mounting plate slots 141 and lower mounting plate slots 161, as well as connecting holes. Square head bolts 130 are sequentially provided on the upper mounting plate slots and connecting holes, and fastening nuts 170 are sequentially provided on the lower mounting plate slots and connecting holes. The upper mounting plate 140 and lower mounting plate 160 of the hole drill are connected into a rigid whole through the cooperation of the square head bolts 130 and the fastening nuts 170. like Figure 4 As shown, a washer 150 is provided between the square head bolt 130 and the fastening nut 170 at the connection between the upper mounting plate slot 141 and the lower mounting plate slot 161. This washer is mainly used to select a suitable washer according to the thickness of the cap and install it between the upper mounting plate of the positioning hole guide and the lower mounting plate of the positioning hole guide to ensure that the subsequent hole guide can be installed on the cap.

[0032] like Figure 6 As shown, the lower mounting plate 160 of the aforementioned hole guide is provided with a lower mounting plate scale line 163 on one side near the square end 160a of the lower mounting plate, so that the position can be clearly seen and checked when the limit is set.

[0033] like Figure 9-11As shown, the aforementioned limiting device is a sliding limiting block 120, which consists of a slider device 122 and a limiting baffle 123. The slider device 122 is rectangular and has a handle 124 on one side of its upper end for easy pushing, facilitating forward and backward movement of the slider. The lower end face of the slider device 122 has a limiting baffle 123, and a tightening bolt hole 121 for fastening the limiting block is provided on the exposed end face of the limiting baffle 123 for connecting the limiting block. Tighten bolt 180. The slider device 122 is connected to the square slot 143 of the upper mounting plate of the upper mounting plate 140 of the hole drill. The limiting baffle 123 is connected between the upper mounting plate 140 and the lower mounting plate 160 of the hole drill and is connected to the lower end face of the slider device 122. The exposed end of the limiting baffle 123 abuts against the side of the lower mounting plate 160 of the hole drill with the scale line 163. The position of the sliding limiting block 120 is adjusted by tightening bolt 180 of the limiting block.

[0034] like Figure 12 As shown, the flexible mounting plate 200 has various thicknesses (1mm, 1.5mm, etc.) and a certain degree of toughness. It is used to fix the positioning hole device 100 and increase the stability of the component, ensuring that the positioning hole device 100 can bend to follow the shape of the cap. The flexible mounting plate 200 has a slot 201 with the same diameter as the square head bolt 130, ensuring that the positioning hole device 100 can slide on the flexible mounting plate 200.

[0035] like Figure 13-14 As shown, before positioning the pilot hole, the flexible pilot hole assembly of the present invention is assembled according to the following steps: Select a suitable washer based on the thickness of the cap and install it between the upper mounting plate 140 and the lower mounting plate 160 of the positioning hole-reamer to ensure that the subsequent hole-reamer can be installed on the cap.

[0036] Based on the number of pre-holes and the shape of the cap, multiple positioning pre-hole devices 100 and flexible mounting plates 200 are combined together (e.g., Figure 13 Tighten the square head bolt 130 on the hole drill bit gently to facilitate subsequent position adjustments.

[0037] Select the appropriate detachable positioning head 110 according to the mounting hole diameter of the tray nut, and install it on the mounting plate 140 of the positioning guide hole.

[0038] Install the assembled flexible borehole assembly on the mouth frame, and adjust the relative position of the flexible mounting plate 200 and the positioning borehole 100 so that the detachable positioning head 110 of each positioning borehole 100 can be fixed in the support plate nut hole on the mouth frame (e.g., Figure 14 Then tighten the square head bolt 130 to ensure the stability of the hole drill bit. Insert the edge of the cap into the positioning hole 100 (e.g.) Figure 15 And ensure that the cap is tightly against the sliding limit block 120 inside the positioning hole 100 to ensure that the edge distance of the hole is consistent with the opening frame (the limiting principle of the sliding limit block is explained in the...). Figure 16 After the two adjacent sides of the cap are tightly attached to the flexible hole-reamer assembly, the relative position between the cap and the frame is guaranteed. At this time, tighten the limiting block tightening bolt 180 on the side of the positioning hole-reamer 100.

[0039] Screw the selected removable pilot hole bushing 190 into the lower mounting plate 160 of the positioning pilot hole and ensure that it is pressed against the surface of the cap (to avoid damaging the surface of the cap, a layer of protective tape can be applied to the drilling surface beforehand).

[0040] Pre-drilling method: Follow the steps S1-S6 above. At this point, the flexible pre-drilling device assembly is positioned and fixed on the cover. Remove the cover from the machine to begin drilling. After the initial hole is drilled, replace it with a larger, removable pre-drilling bushing 190 (replace each pre-drilling device individually) until the final hole is drilled. After drilling, loosen the removable pre-drilling bushing 190 and remove the flexible pre-drilling device assembly from the cover. Then, perform subsequent countersinking and other work as required. The pre-drilling process is now complete. Example 2

[0041] like Figure 18 As shown, unlike Embodiment 1, in this embodiment, the positioning head is removed for drilling. The connection relationship is as described in Embodiment 1 above. Before drilling, the detachable positioning head 110 can be removed to avoid the drill bit damaging the positioning head (the inner side of the positioning head has a tapered groove, which ensures that the drill bit can completely pass through the cover even when drilling without removing the positioning head. The positioning head is replaced after repeated drilling wear). Use a suitable drill bit to drill along the through hole direction of the detachable pilot hole bushing 190. After the initial hole is drilled, replace it with a larger detachable pilot hole bushing 190 (replace each positioning pilot hole one by one) until the final hole is drilled. After drilling, loosen the detachable pilot hole bushing 190 and remove the flexible pilot hole assembly from the cover. Then, perform subsequent countersinking and other work as required. The pilot hole work is completed. Example 3

[0042] like Figure 19 As shown, the present invention is a method for sealing the coaxiality of the cap or skin with the guide hole of the skeleton, the method comprising: Step 1. Assemble the positioning hole generator 100 and the flexible mounting plate 200 into a flexible hole generator.

[0043] Step 2. Install the assembled flexible hole drill on the frame or skin, and adjust and fix the position of the frame or skin to position the hole.

[0044] Step 3. After positioning, the flexible hole-making device assembly is fixed on the cap. Remove the cap from the machine to perform the hole-making operation.

[0045] Step 4. After the hole is made, loosen the removable hole bushing 190 and remove the flexible hole generator assembly from the cap. Then, perform subsequent countersinking and other work as required. The hole making work is now complete.

[0046] Installation method of this invention: The positioning hole guide 100 and the flexible mounting plate 200 are used, with the positioning hole guide 100 being the main functional structure, which can guide the holes on the mouth frame to the mouth cover (each hole guide can guide 1 hole). The flexible mounting plate 200 is used to combine multiple hole drills to achieve the purpose of simultaneously drilling multiple holes. The positioning hole drill 100 includes a detachable positioning head 110, a sliding limit block 120, a square head bolt 130, an upper mounting plate 140 for the positioning hole drill, a washer 150, a lower mounting plate 160 for the positioning hole drill, a fastening nut 170, a limit block tightening bolt 180, a detachable hole drill bushing 190, a slider device 122, a limit baffle 123, a handle 124, a first positioning head component 113, a second positioning head component 114, a first bushing component 193, and a second bushing component 194. The lower mounting plate 160 and the upper mounting plate 140 for the positioning hole drill are combined into a rigid box by the square head bolt 130, the washer 150, and the fastening nut 170. The upper mounting plate 140 of the positioning pilot hole device is provided with a slot 141, and the lower mounting plate 160 of the positioning pilot hole device is provided with a slot 161. The square head bolt 130 can slide in the slot after the fastening nut 170 is loosened. During operation, the relative position of the positioning pilot hole device 100 and the flexible mounting plate 200 can be adjusted by adjusting the position of the square head bolt 130. The upper mounting plate 140 of the positioning pilot hole device is provided with an internal thread 142, the lower mounting plate 160 of the positioning pilot hole device is provided with an internal thread 162, the detachable positioning head 110 is provided with an external thread, and the detachable pilot hole bushing 190 is provided with an external thread 191. The detachable positioning head 110 and the detachable pilot hole bushing 190 can be installed into the threaded holes of the lower mounting plate 160 and the upper mounting plate 140 of the positioning pilot hole device, respectively, via threaded connections. The aforementioned sliding limit block 120 is placed between the lower mounting plate 160 and the upper mounting plate 140 of the positioning pilot hole device and can slide through the square slot 143 of the upper mounting plate 140. The sliding limit block 120 is provided with a threaded hole that matches the external thread 181 of the limit block tightening bolt 180. By moving the sliding limit block 120 and observing the scale line 163 on the lower mounting plate 160 of the positioning pilot hole device, the edge distance value of the hole to be drilled can be determined. Once the sliding limit block 120 is in place, tightening the limit block tightening bolt 180 fixes the position of the sliding limit block 120. The aforementioned flexible mounting plate 200 has various thicknesses (1mm, 1.5mm, etc.) and a certain degree of toughness, used to fix the positioning hole device 100, while increasing the stability of the component and ensuring that the positioning hole device 100 can bend to follow the shape of the cap. The flexible mounting plate 200 has a slot 201 with the same diameter as the square head bolt 130, ensuring that the positioning hole device 100 can slide on the flexible mounting plate 200.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hole-guiding device for ensuring the coaxiality of the cap or skin of a closed area with the guide hole of the skeleton, characterized in that, The system includes a positioning hole generator (100) and a flexible mounting plate (200). The flexible mounting plate (200) is rectangular and has a groove in the middle to connect a plurality of positioning hole generators (100). The flexible mounting plate (200) has multiple positioning hole generators (100). Each positioning hole generator (100) includes an upper mounting plate (140) and a lower mounting plate (160) arranged vertically. One end of the 40) is connected to a positioning device. One end of the bottom of the lower mounting plate (160) of the positioning hole generator is provided with a detachable hole bushing (190). A limiting device is provided on one side of the lower mounting plate (160) of the positioning hole generator. The flexible mounting plate (200) is connected between the upper mounting plate (140) of the positioning hole generator and the lower mounting plate (160) of the positioning hole generator. The limiting device is a sliding limiting block (120), and the sliding limiting block (120) is composed of a rectangular slider (122) and a limiting baffle (12). 3) Composition: The upper end of the rectangular slider (122) is provided with a handle (124) for easy operation. The limiting baffle (123) is L-shaped and is located at the lower end of the rectangular slider (122). The end face of the limiting baffle (123) is provided with a threaded hole (121) for mounting the limiting block tightening bolt. The limiting baffle (123) is connected to the limiting block tightening bolt (180) through the threaded hole (121) to connect the limiting baffle (123) to one side of the lower mounting plate (160) of the positioning guide hole. The positioning hole guide upper mounting plate (140) includes a square end (140a) and a long rectangular end (140b) of the upper mounting plate. The positioning hole guide upper mounting plate (140) is provided with a vertical through upper mounting plate slot (141) and an upper mounting plate square slot (143). A connecting hole is opened in the middle of the positioning hole guide upper mounting plate (140), and an upper mounting plate internal thread (142) is opened in the square end (140a).

2. The hole-guiding device for ensuring the coaxiality of the cover or skin of the enclosed area with the guide hole of the skeleton according to claim 1, characterized in that, The main body of the positioning device is a positioning head, which is detachable. The detachable positioning head consists of a first positioning head component (113) and a second positioning head component (114). The diameter of the second positioning head component (114) is larger than the diameter of the first positioning head component (113). The detachable positioning head is provided with external threads. The detachable positioning head can be installed into the threaded hole of the mounting plate (140) on the positioning guide hole device through threaded connection.

3. The hole-guiding device for ensuring the coaxiality of the cover or skin of the enclosed area with the guide hole of the skeleton according to claim 1, characterized in that, The lower mounting plate (160) of the positioning hole guide is composed of a square end (160a) and a rectangular end (160b) of the lower mounting plate. The rectangular end (160b) of the lower mounting plate is provided with a vertically opening slot (161), and a connecting hole corresponding to the upper mounting plate (140) of the positioning hole guide is opened in the middle. The square end (160a) of the lower mounting plate is provided with an internal thread corresponding to the upper mounting plate (140) of the positioning hole guide.

4. The hole-guiding device for ensuring the coaxiality of the cover or skin of the enclosed area with the guide hole of the skeleton according to claim 1, characterized in that, The detachable pilot hole bushing (190) is composed of a first bushing component (193) and a second bushing component (194), and the lower end face of the first bushing component (193) is connected to the upper end face of the second bushing component (194). The diameter of the first bushing component (193) is smaller than that of the second bushing component (194). The detachable pilot hole bushing (190) is provided with external threads. The detachable pilot hole bushing (190) is installed into the threaded hole of the lower mounting plate (160) of the positioning pilot hole device through a threaded connection.

5. The hole-guiding device according to any one of claims 1-4 for ensuring the coaxiality of the cap or skin of the enclosed area with the guide hole of the skeleton, characterized in that, The upper mounting plate slot (141) and lower mounting plate slot (161) of the positioning hole guide and the lower mounting plate (160) of the positioning hole guide are respectively positioned in a corresponding manner as well as connecting holes. The upper mounting plate slot (141) and the connecting hole are respectively provided with square head bolts (130), and the lower mounting plate slot (161) and the connecting hole are respectively provided with fastening nuts (170). The upper mounting plate (140) and the lower mounting plate (160) of the positioning hole guide are connected into a rigid whole by the cooperation of the square head bolts (130) and the fastening nuts (170).

6. The hole-guiding device for ensuring the coaxiality of the cover or skin of the enclosed area with the guide hole of the skeleton according to claim 5, characterized in that, The square head bolt (130) and the fastening nut (170) are provided with a washer (150) between the mating part of the upper mounting plate slot (141) and the lower mounting plate slot (161).

7. The hole-guiding device for ensuring the coaxiality of the cover or skin of the enclosed area with the guide hole of the skeleton according to claim 1, characterized in that, The lower mounting plate (160) of the positioning hole guide is provided with a lower mounting plate scale (163) on the side near the square end.

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