Device and method for improving precision of manual reaming hole

Abstract

The invention belongs to the technical field of aircraft assembling and manufacturing, and provides a device and method for improving the precision of a manual reaming hole, the device comprises a hole guiding drill jig, the hole guiding drill jig is installed on a part to be drilled, the hole guiding drill jig is provided with a drill jig body, a set screw, a reaming hole quick-change drill sleeve and a positioning pin, the drill jig body is designed to be of a U-shaped structure, and the set screw is arranged on the drill jig body; the set screw and the reaming hole quick-change drill bushing are arranged on the two sides of the drill jig body respectively. When in use, the drill jig body is inserted into a part to be drilled, the drill jig body and the part to be drilled are inserted and positioned by using the positioning pin, the set screw is screwed to fix the drill jig body, the reaming quick-change drill bushing is replaced step by step, and manual reaming is completed. The technical problem that in the pure manual hole expanding and reaming process, the hole expanding and reaming precision is low is solved, and adverse effects in the follow-up product assembling process are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft assembly and manufacturing, and mainly relates to a device and method for improving the accuracy of manual hole reaming and boring when a connecting hole is already drilled on a product during the aircraft assembly and manufacturing process. Specifically, it relates to a device and method for improving the accuracy of manual hole reaming and boring. Background Art

[0002] During the aircraft assembly and manufacturing process, it's common for parts to have initial holes drilled on a fixture, or after initial holes are drilled under specific working conditions, the part is removed from the fixture and manually reamed and released to the final hole. For example, when connecting a product like a radome to an aircraft, a hole with a larger diameter than the aircraft's frame structure is often drilled in the radome's housing to accommodate a bushing (the bushing's inner diameter matches the final hole in the aircraft's frame). The final bolts connect the radome to the aircraft's frame through the bushing. When this type of radome is replaced on an aircraft, the final hole has already been drilled in the aircraft's frame. Therefore, after the new radome is positioned on the aircraft's frame, an initial hole is drilled in the radome using a specialized jig. The radome is then removed from the aircraft's frame and manually reamed.

[0003] In this case, simply relying on manual reaming and boring has poor accuracy and cannot guarantee the coaxiality of the connecting hole and the bottom hole after reaming. In particular, it is more difficult to control the coaxiality of the reamed hole and the bottom hole when the surface of the part to be reamed is curved. It is also not conducive to the control of the hole diameter, which in turn affects the fit between the connecting bolt and the existing end hole on the machine frame structure after the bushing is installed, resulting in the connecting bolt being unable to be installed in place or stress installation causing the connecting bolt to bear a larger load. Summary of the Invention

[0004] The present invention aims to improve the accuracy of manual reaming holes, which has the problem that the coaxiality between the reamed hole and the bottom hole is poor, and the hole position accuracy and hole diameter size are easily out of tolerance, resulting in the inability to assemble subsequent products or high assembly stress. The present invention provides a device and method for improving the accuracy of manual reaming holes. By controlling the coaxiality between the reamed hole and the bottom hole during reaming, the accuracy of reaming holes is improved, and the adverse effects in the subsequent product assembly process are reduced.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a device for improving the accuracy of manual reaming, comprising: a drilling jig; The drilling template is installed on the part to be drilled, and it has a drilling template body, a set screw, a quick-change drill sleeve for reaming and reaming, and a positioning pin. The drilling template body adopts a U-shaped structure design, and the set screw and the quick-change drill sleeve for reaming and reaming are respectively arranged on both sides of the drilling template body; When in use, insert the drill template body into the part to be holed, use the positioning pin to insert and position the drill template body and the part to be holed, tighten the set screws to fix the drill template body, gradually replace the quick-change drill sleeve for reaming the hole, and complete the manual reaming.

[0006] As a further solution of the present invention: the drilling template adopts a U-shaped opening structure design, and a coaxially arranged through hole and a clearance hole are respectively opened on its two supporting legs.

[0007] As a further solution of the present invention: four set screws are provided and are evenly distributed on the supporting legs provided with the clearance holes.

[0008] As a further solution of the present invention, a quick-change drill sleeve bushing is interference-fitted in the through hole and is used in conjunction with a quick-change drill sleeve for reaming and expanding the hole.

[0009] As a further solution of the present invention: a clearance groove is provided on the inner side of the support leg provided with the through hole.

[0010] As a further solution of the present invention: the bushing for the quick-change drill sleeve adopts a flange structure design and has a protruding limit platform, which is used in conjunction with the limit surface on the quick-change drill sleeve for reaming and expanding holes.

[0011] As a further solution of the present invention: the quick-change drill sleeve for reaming and expanding holes adopts a flange structure design and has multiple limiting surfaces.

[0012] As a further solution of the present invention: the diameter of the clearance hole is larger than the final hole diameter of the part to be holed, and the diameter of the positioning pin is adapted to the initial hole of the part to be holed.

[0013] As a further solution of the present invention, a rubber pad is added between the set screw and the surface of the part to be holed, and then the thickness of the rubber pad is adjusted and the set screw is tightened until the hole drilling jig is fixed on the part to be holed.

[0014] In a second aspect, the present invention provides a method for improving the accuracy of manual reaming, comprising the following steps: Step 1: After the initial hole is drilled in the part to be drilled, insert the drill template from the root end face of the part to be drilled; Step 2: Select a quick-change drill sleeve with the same diameter as the initial hole, and insert it into the bushing hole of the quick-change drill sleeve until it is in place; Step 3: Adjust the position of the drill jig until the initial hole on the part to be drilled is aligned with the hole of the reaming quick-change drill sleeve, and then insert a locating pin that matches the initial hole diameter; Step 4: Place protective materials such as rubber pads between the set screws and the surface of the part to be drilled. Then, adjust the thickness of the protective material and tighten the set screws until the drilling jig is firmly fixed on the part to be drilled without shaking, and the locating pin can be smoothly inserted and removed from the initial hole and the hole of the reaming quick-change drill sleeve of the part to be drilled. Step 5: Remove the positioning pin and the reaming quick-change drill sleeve, replace it with a reaming quick-change drill sleeve of the size of the hole to be reamed or the size of the hole to be reamed, and place it in place in the quick-change drill sleeve bushing; Step 6: Use a reaming tool or a boring tool to reame the initial hole of the part to be bored; Step 7: Repeat steps 5 and 6 until the initial hole in the part to be drilled is expanded and reamed to the final hole, then remove the drilling jig and clean the burrs and excess materials on the hole of the part to be drilled; Step 8: Repeat steps 1 to 7 until all the connecting holes in the part to be drilled are reamed.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. This application can achieve a firm fixation of the drilling jig and the parts under different placement states of the parts.

[0016] 2. This application achieves coaxial positioning of the drill sleeve hole on the drill template and the initial hole on the part, effectively ensuring the coaxiality of the reaming tool and the bottom hole during the reaming process, while reducing the requirements for the front-end guide structure of the reaming tool, thereby increasing the applicability of the reaming tool.

[0017] 3. This application can not only meet the precision requirements of reaming holes in planar structures, but is also suitable for reaming holes in curved parts, thus expanding the applicable working conditions of this device.

[0018] 4. This application adopts a structure in which a quick-change drill sleeve and a bushing are matched. By replacing drill sleeves of different sizes, the needs of reaming connecting holes with different aperture requirements can be met.

[0019] 5. The implementation and application of this application in the replacement process of a certain type of radar antenna cover effectively improves the coaxiality of the bottom hole during manual reaming during the replacement process, solves the problems of poor hole position accuracy after replacement and misalignment with the hole position of the aircraft frame structure, thereby reducing the overall manufacturing cost caused by replacement and repair, and achieving good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a device for improving the accuracy of manual reaming of a hole according to the present invention; Figure 2 The present invention is a schematic structural diagram of a device for improving the accuracy of manual reaming.

[0021] Explanation of the accompanying symbols: 1. Part to be holed; 2. Drilling jig for guiding the hole; 3. Drilling jig body; 4. Set screw; 5. Quick-change drill sleeve for reaming the hole; 6. Bushing for quick-change drill sleeve; 7. Clearance hole; 8. Positioning pin. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] In the drawings, the same or similar reference numerals throughout the drawings represent the same or similar elements or elements having the same or similar functions. The described embodiments are only some of the embodiments of the present invention, but not all of the embodiments.

[0024] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0025] The following is combined with Figure 1-2 The embodiments of the present invention are described in detail.

[0026] Example 1 The present invention provides a device for improving the accuracy of manual reaming, which comprises: a drilling template 2, The drilling template 2 is installed on the part to be drilled 1, which has a drilling template body 3, a set screw 4, a quick-change drill sleeve 5 for reaming and reaming, and a positioning pin. The drilling template body 3 adopts a U-shaped structure design, and the set screw 4 and the quick-change drill sleeve 5 for reaming and reaming are respectively arranged on both sides of the drilling template body 3; When in use, insert the drill template 3 into the part 1 to be holed, use the positioning pin to insert and position the drill template 3 and the part 1 to be holed, tighten the set screw 4 to fix the drill template 3, gradually replace the quick-change drill sleeve 5 for reaming the hole, and complete the manual reaming.

[0027] Preferably, the drilling template body 3 adopts a U-shaped opening structure design, and a coaxially arranged through hole and a clearance hole 7 are respectively opened on its two supporting legs.

[0028] Preferably, there are four set screws 4 , which are evenly distributed on the supporting legs with the clearance holes 7 .

[0029] Preferably, a quick-change drill sleeve bushing 6 is interference-fitted in the through hole and used in conjunction with the quick-change drill sleeve 5 for reaming.

[0030] Preferably, a clearance groove is provided on the inner side of the support foot provided with the through hole.

[0031] Preferably, the quick-change drill sleeve bushing 6 is designed with a flange structure and has a protruding limit platform, which is used in conjunction with the limit surface on the reaming quick-change drill sleeve 5.

[0032] Preferably, the reaming quick-change drill sleeve 5 adopts a flange structure design and has multiple limiting surfaces.

[0033] Preferably, the diameter of the clearance hole 7 is larger than the final hole diameter of the part 1 to be drilled, and the diameter of the positioning pin 8 is adapted to the initial hole of the part 1 to be drilled.

[0034] Preferably, a rubber pad is placed between the set screw 4 and the surface of the part 1 to be drilled, and then the thickness of the rubber pad is adjusted and the set screw 4 is tightened until the drilling jig 2 is fixed on the part 1 to be drilled.

[0035] Main invention points: The hole drilling jig 2 described in the present invention has a simple structure and a small size, and can be applied to the reaming operations of flat parts and curved parts.

[0036] Secondary invention point: The hole-guiding drill template 2 of the present invention can realize reaming operations of different hole sizes by replacing drill sleeves of different sizes.

[0037] Secondary invention point: The hole-guiding drill jig 2 described in the present invention can set multiple drill sleeve positioning holes on the drill jig according to the surface type of the part (such as plane or curved surface and the size of the curvature) and the distribution pattern of the connecting holes, so as to improve the efficiency of reaming the holes.

[0038] Secondary invention point: The hole-guiding drill jig 2 described in the present invention adds a clearance hole 7 on the outlet side of the reaming tool to facilitate avoiding the reaming tool during the reaming process and prevent the tool from interfering with the hole-guiding drill jig 2.

[0039] Example 2 The present invention provides a method for improving the accuracy of manual reaming, which comprises the following steps: Step 1: After the initial hole is drilled in the part 1 to be drilled, the drilling template 3 is inserted from the root end face of the part 1 to be drilled; Step 2: Select a quick-change drill sleeve 5 with the same diameter as the initial hole, and insert it into the hole of the quick-change drill sleeve bushing 6 and put it in place; Step 3: Adjust the position of the drill template 3 until the initial hole on the part 1 to be drilled is aligned with the hole of the reaming quick-change drill sleeve 5, and then insert a positioning pin 8 that is consistent with the initial hole diameter; Step 4: Add protective materials such as rubber pads between the set screw 4 and the surface of the part 1 to be drilled, then adjust the thickness of the protective material and tighten the set screw 4 until the drilling jig 2 is firmly fixed on the part 1 to be drilled without shaking, and the positioning pin 8 can be smoothly inserted and removed from the initial hole and the hole of the reaming quick-change drill sleeve 5 of the part 1 to be drilled; Step 5: Remove the positioning pin 8 and the reaming quick-change drill sleeve 5, replace them with the reaming quick-change drill sleeve 5 of the size of the hole to be reamed or the size of the hole to be reamed, and place them in place in the quick-change drill sleeve bushing 6; Step 6: Use a reaming tool or a boring tool to reame the initial hole of the part 1 to be bored; Step 7: Repeat steps 5 and 6 until the initial hole in the part 1 to be drilled is expanded and reamed to the final hole, then remove the guide hole drilling jig 2 and clean the burrs and excess materials on the hole of the part 1 to be drilled; Step 8: Repeat steps 1 to 7 until all the initial holes of the connecting holes in the part 1 to be drilled are reamed.

[0040] So far, the purpose of the present invention has been achieved.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for improving the accuracy of manual reaming, characterized in that: include: Drilling template, The drilling template is installed on the part to be drilled, and comprises a drilling template body, a set screw, a quick-change drill sleeve for reaming and reaming, and a positioning pin. The drilling template body adopts a U-shaped structure design, and the set screw and the quick-change drill sleeve for reaming and reaming are respectively arranged on both sides of the drilling template body; When in use, insert the drill template body into the part to be holed, use the positioning pin to insert and position the drill template body and the part to be holed, tighten the set screws to fix the drill template body, gradually replace the quick-change drill sleeve for reaming the hole, and complete the manual reaming.

2. The device for improving the accuracy of manual reaming according to claim 1, characterized in that: The drilling template adopts a U-shaped opening structure design, and a coaxially arranged through hole and a clearance hole are respectively opened on its two supporting legs.

3. The device for improving the accuracy of manual reaming according to claim 2, characterized in that: There are four set screws, which are evenly distributed on the supporting legs with the clearance holes.

4. The device for improving the accuracy of manual reaming according to claim 3, characterized in that: A quick-change drill sleeve bushing is interference-fitted in the through hole and is used in conjunction with a quick-change drill sleeve for reaming holes.

5. The device for improving the accuracy of manual reaming according to claim 4, characterized in that: A recess is provided on the inner side of the support leg with the through hole.

6. The device for improving the accuracy of manual reaming according to claim 5, characterized in that: The bushing for the quick-change drill sleeve adopts a flange structure design and has a protruding limit platform, which is used in conjunction with the limit surface on the quick-change drill sleeve for reaming holes.

7. The device for improving the accuracy of manual reaming according to claim 6, characterized in that: The quick-change drill sleeve for reaming and expanding holes adopts a flange structure design and has multiple limiting surfaces.

8. A device for improving the accuracy of manual reaming according to any one of claims 2 to 7, characterized in that: The aperture of the said clearance hole is larger than the final hole diameter of the part to be holed, and the diameter of the said positioning pin is adapted to the initial hole of the part to be holed.

9. The device for improving the accuracy of manual reaming according to claim 8, characterized in that: Place a rubber pad between the set screw and the surface of the part to be holed, then adjust the thickness of the rubber pad and tighten the set screw until the hole drilling jig is fixed on the part to be holed.

10. A method for improving the accuracy of manual reaming, characterized in that: The following steps are involved: Step 1: After the initial hole is drilled in the part to be drilled, insert the drill template from the root end face of the part to be drilled; Step 2: Select a quick-change drill sleeve with the same diameter as the initial hole, and insert it into the bushing hole of the quick-change drill sleeve until it is in place; Step 3: Adjust the position of the drill jig until the initial hole on the part to be drilled is aligned with the hole of the reaming quick-change drill sleeve, and then insert a locating pin that matches the initial hole diameter; Step 4: Place protective materials such as rubber pads between the set screws and the surface of the part to be drilled. Then, adjust the thickness of the protective material and tighten the set screws until the drilling jig is firmly fixed on the part to be drilled without shaking, and the locating pin can be smoothly inserted and removed from the initial hole and the hole of the reaming quick-change drill sleeve of the part to be drilled. Step 5: Remove the positioning pin and the reaming quick-change drill sleeve, replace it with a reaming quick-change drill sleeve of the size of the hole to be reamed or the size of the hole to be reamed, and place it in place in the quick-change drill sleeve bushing; Step 6: Use a reaming tool or a boring tool to reame the initial hole of the part to be bored; Step 7: Repeat steps 5 and 6 until the initial hole in the part to be drilled is expanded and reamed to the final hole, then remove the drilling jig and clean the burrs and excess materials on the hole of the part to be drilled; Step 8: Repeat steps 1 to 7 until all the connecting holes in the part to be drilled are reamed.

Images