A tool and tool holder system for drilling holes for engine suspension fasteners
By designing an integrated drilling tool and tool holder system, combined with the automatic chip removal function, the problem of drilling large-diameter fastener holes on difficult-to-process materials such as titanium alloys is solved, achieving efficient processing and environmental cleaning.
Patent Information
- Application Number
- CN202311380220.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-24
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2043-10-24
AI Technical Summary
During the assembly process of aircraft, it is difficult to efficiently drill large-diameter fastener holes on difficult-to-process materials such as titanium alloys and automatically remove drill chips, resulting in unclean production site environment.
Design a drilling and counterfeiting tool and tool holder system, combining drilling and counterfeiting functions, and realize automatic chip removal through dust collecting cover and chip suction pipe, including a combination of drilling and counterfeiting knife, mouth and tool holder, use internal cooling holes to cool down and lubricate, and form chip removal channels to tilt ribs and chip removal grooves. The dust collecting cover is connected to the chip suction pipe to achieve efficient discharge of drilling chips.
It realizes automatic drilling of large-diameter fastener holes and countersunks on difficult-to-process materials such as titanium alloys to ensure clean production environment and improve processing efficiency and quality.
Smart Images
Figure CN117300217B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of aircraft assembly process design and relates to a tool for drilling engine hanging fastener holes and a tool handle system. Background Art
[0002] For wing-mounted aircraft, the engine pylon connects the engine to the wing, transmitting engine thrust. Its components are primarily made of titanium and steel, and are thick. A major part of assembly is creating fastener holes and installing the fasteners. Because the pylon fasteners have a large diameter and are primarily made of titanium alloy, the holes require significant strength. Summary of the Invention
[0003] The present invention provides a tool and tool holder system for drilling holes for engine hanger fasteners. The system comprises a tool, a tool nose, and a tool holder system for drilling holes for fasteners of engine hanger components during the assembly process. The system is an important link in the automatic hole making process of aircraft engine hangers at the assembly site. The system can complete the drilling of large-diameter fastener holes and countersinks in difficult-to-machine materials such as titanium and steel in one go, with qualified quality and automatic elimination of cutting.
[0004] In order to achieve the above object, the present invention adopts the following technical solutions:
[0005] A tool and tool holder system for drilling holes for engine suspension fasteners, the system comprising a tool, a tool nose, and a tool holder, wherein the tool holder is a finished tool holder, and the tool and tool nose cooperate with it to achieve drilling, countersinking, and automatic chip removal.
[0006] The tool is a drill and countersink tool, that is, a combination of a drill bit and a countersink drill, including a drilling part 1, a countersink part 2, an internal coolant hole 3, a secondary tool tip 4, a step 5, and a chip groove 6; the front part of the drilling part 1 is a drill bit, and the rear part is a tail handle. An internal coolant hole 3 is arranged axially, and the internal coolant hole 3 is a through hole for cooling and lubrication. A secondary tool tip 4 is arranged at the tip of the drill bit, and the shape of the secondary tool tip 4 is similar to that of a small-diameter drill bit. A countersink part 2 is provided in the middle of the drilling part 1, which is connected to the drilling part 1 drill bit, and the blades of the two are connected. A spiral chip groove 6 is provided on the drill bit and the countersink part 2; in particular, a small-diameter step 5 is provided at the tail end of the countersink part 2, which is used to cooperate with the chip groove 6, and the two form a chip removal channel, and large-sized drill chips can be discharged smoothly along the chip removal channel.
[0007] The knife tip includes a circular base plate 7, a bolt mounting hole 8, a center hole 9, an end small hole 10, and an oblique rib 11; a plurality of bolt mounting holes 8 are arranged along the circumference of the edge of the circular base plate 7, and the bolt mounting hole 8 is an oblong hole with an axis parallel to the circumference. A large hole is arranged at one end of the oblong hole for the bolt head to pass through so as to achieve a fixed connection with the outer end face of the dust collecting cover 15 in the knife handle; a center hole 9 is arranged at the center of the upper surface of the circular base plate 7, which is a cylinder with a central opening, and an end small hole 10 is arranged on the side wall of the top of the cylinder along the circumference for ventilation. An oblique rib 11 is arranged on the outer wall of one side of the cylinder of the center hole 9, and its bottom end is connected to the circular base plate 7, and the top end is connected to the top of the cylinder of the center hole 9 and the connection is located below the end small hole 10. A lateral chip removal hole is opened at the center of the upper edge of the oblique rib 11, and the chip removal hole is communicated with the intersection of the center hole 9 and the circular base plate 7. Part of the drill cuttings are discharged into the dust collecting cover 15 of the knife handle through the chip removal hole and discharged through the chip suction pipe.
[0008] The tool handle is an existing finished tool handle, including a general machine tool tool handle 12, a telescopic cover box body 13, a telescopic round rod 14, a dust cover 15, a bottom plate connecting surface 16, and a side hole 17; the general machine tool tool handle 12 is the main body, which is used to clamp the tail handle of the tool, and the telescopic cover box body 13 is arranged on the outer sleeve, and a bearing is provided between the two, so that the telescopic cover box body 13 does not rotate with the general machine tool tool handle 12, and a plurality of telescopic round rods 14 are arranged inside the telescopic cover box body 13, and the ends of the telescopic round rods 14 are connected to the dust cover 15, and the telescopic and retractable round rods 14 are controlled by introducing compressed air, thereby adjusting the distance between the dust cover 15 and the telescopic cover box body 13; the dust cover 15 is an annular structure, and the head of the general machine tool tool handle 12 penetrates into the dust cover 15 and clamps the tool, and its outer end face is the bottom plate The connecting surface 16 is provided with a bolt hole, and the tool mouth is mounted on the base plate connecting surface 16 through the bolt mounting hole 8, and the tool mouth is coaxial with the dust collecting cover 15. The inner hole of the dust collecting cover 15 close to the side of the telescopic cover box body 13 is slidably connected to a hollow cylinder. The center of the end of the cylinder is made into a through hole for the general machine tool handle 12 to pass through, and the two are clearance-matched. The cylinder and the inner hole of the dust collecting cover 15, the center hole 9 in the tool mouth and the oblique rib 11 form a dust collecting chamber. The drill chips discharged from the chip removal holes on the oblique rib 11 or from the chip removal channel formed by the chip removal groove 6 and the step 5 on the tool are concentrated in the dust collecting chamber. A side hole 17 is opened on the side of the dust collecting cover 15 for connecting a chip suction pipe to discharge the drill chips in the dust collecting chamber, wherein the side hole 17 and the axis of the chip removal hole on the oblique rib 11 in the tool mouth are on the same plane.
[0009] The hole making process using the system is as follows:
[0010] The first step: insert the drilling part 1 tail handle of the tool into the general machine tool handle 12 of the tool holder and tighten it.
[0011] Step 2: Fit the circular bottom plate 7 of the cutting mouth with the bottom plate connecting surface 16 on the dust collecting cover 15, and connect it to the dust collecting cover 15 through the bolt mounting hole 8. Align the chip removal hole of the oblique rib 11 on the cutting mouth with the side hole 17 on the dust collecting cover 15 to ensure that the axes of the two holes are in the same plane. Finally, tighten the bolts connecting the cutting mouth and the dust collecting cover 15; the chip suction pipe on the side of the dust collecting cover 15 is connected to the exhaust device.
[0012] The third step: install the general machine tool handle 12 of the tool holder to the CNC machine tool to drill and countersink the product.
[0013] Move the tool holder and tool mouth to the vicinity of the product to be processed; the machine tool spindle rotates, and the tool holder 12 generally drives the tool to rotate; compressed air is introduced into the tool holder, the telescopic rod 14 extends, the dust cover 15 and the tool mouth extend, so that the tool is retracted in the dust cover 15, and the end of the secondary tool tip 4 does not exceed the end of the center hole 9 of the tool mouth; the tool mouth is brought into contact with the surface of the product to be processed and kept vertical; the length of the telescopic rod 14 is controlled, and the secondary tool tip 4 is quickly moved to a set distance from the surface of the product to be processed; the tool internal cooling and lubrication system is turned on, and the internal cooling hole 3 is used to cool the tool. After lubrication and cooling, the exhaust device is turned on to extract air from the inside of the dust hood 15. The air flows into the dust hood 15 through the center hole 9 and the small holes 10 at the end. The length of the telescopic round rod 14 is controlled by compressed air to realize the feeding of the tool. At the beginning of drilling, the drill chips are discharged into the dust hood 15 through the chip discharge holes on the oblique ribs 11. When drilling to a certain depth, the drill chips increase in size. The large drill chips are discharged into the dust hood 15 along the chip discharge channel formed by the chip discharge groove 6 and the step 5 on the tool. The drill chips in the dust hood 15 are discharged through the chip suction pipe and discharged into the collector.
[0014] The beneficial effects of the present invention are: realizing automatic hole making and countersinking of large-diameter fasteners and large-thickness holes and difficult-to-process materials of assembly parts, eliminating drill chips, and ensuring a clean environment at the assembly production site. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 Schematic diagram of the tool structure.
[0016] Figure 2 Schematic diagram of the blade structure.
[0017] Figure 3 Schematic diagram of the handle structure.
[0018] Figure 4 This is the overall assembly diagram of the present invention.
[0019] In the figure: 1 drilling part; 2 countersink part; 3 internal coolant hole; 4 secondary tool tip; 5 step; 6 chip groove; 7 circular base plate; 8 bolt mounting hole; 9 center hole; 10 end small hole; 11 oblique rib; 12 general machine tool handle; 13 telescopic cover box body; 14 telescopic round rod; 15 dust collection cover; 16 base plate connecting surface; 17 side hole. DETAILED DESCRIPTION
[0020] The following is a clear and complete description of the technical solution of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments improved or adjusted by ordinary technicians in this field fall within the scope of protection of the present invention.
[0021] This embodiment takes the engine suspension of the C919 project as an example, and describes a tool and tool holder system for drilling engine suspension fastener holes. The system includes a tool, a tool tip, and a tool holder. The tool holder is a finished tool holder, and the tool and tool tip cooperate with it to achieve drilling, countersinking, and automatic chip removal. Figure 4 shown.
[0022] like Figure 1 As shown, the tool is a drill and countersink tool, that is, a combination of a drill bit and a countersink drill, including a drilling part 1, a countersink part 2, an inner coolant hole 3, a secondary tool tip 4, a step 5, and a chip groove 6; the front part of the drilling part 1 is a drill bit, the rear part is a tail handle, an inner coolant hole 3 is axially arranged, the inner coolant hole 3 is a through hole, a secondary tool tip 4 is arranged at the tip of the drill bit, which is a twist drill with a diameter of 3.2 mm, a countersink part 2 is provided in the middle of the drilling part 1, which is connected to the drilling part 1 drill bit, and the blades of the two are connected, and a spiral chip groove 6 is provided on the drill bit and the countersink part 2; in particular, a small-diameter step 5 is provided at the tail end of the countersink part 2, which is used to cooperate with the chip groove 6, and the two form a chip removal channel, and large-sized drill chips can be discharged smoothly along the chip removal channel.
[0023] like Figure 2 As shown, the knife tip includes a circular bottom plate 7, a bolt mounting hole 8, a center hole 9, a small hole 10 at the end, and an oblique rib 11; a plurality of bolt mounting holes 8 are arranged along the circumference of the edge of the circular bottom plate 7, and the bolt mounting holes 8 are oblong holes with axes parallel to the circumference. A large hole is arranged at one end of the oblong hole for the bolt head to pass through so as to achieve a fixed connection with the outer end face of the dust collecting cover 15 in the knife handle; a center hole 9 is arranged at the center of the upper surface of the circular bottom plate 7, which is a cylinder with a center hole, and the top side wall of the cylinder is along the There are 27 small holes 10 on the circumference with a diameter of 1.5 mm for ventilation. An oblique rib 11 is provided on the outer wall of one side of the cylinder with the center hole 9. The bottom end of the rib is connected to the circular bottom plate 7, and the top end is connected to the top of the cylinder with the center hole 9 and the connection is located below the small hole 10 on the end. A lateral chip removal hole is opened along the center of the upper edge of the oblique rib 11. The chip removal hole is connected to the junction of the center hole 9 and the circular bottom plate 7. Part of the drill chips are discharged into the dust collecting cover 15 of the tool handle through the chip removal hole and discharged through the chip suction pipe.
[0024] like Figure 3As shown, the tool handle is an existing finished tool handle, including a general machine tool tool handle 12, a telescopic cover box body 13, a telescopic round rod 14, a dust collecting cover 15, a bottom plate connecting surface 16, and a side hole 17; the general machine tool tool handle 12 is the main body, which is used to clamp the tail handle of the tool, and the telescopic cover box body 13 is arranged on the outer sleeve, and a bearing is provided between the two, so that the telescopic cover box body 13 does not rotate with the general machine tool tool handle 12, and a plurality of telescopic round rods 14 are arranged inside the telescopic cover box body 13, and the ends of the telescopic round rods 14 are connected to the dust collecting cover 15, and the telescopic and extension of the telescopic round rods 14 are controlled by introducing compressed air, thereby adjusting the distance between the dust collecting cover 15 and the telescopic cover box body 13; the dust collecting cover 15 is an annular structure, and the head of the general machine tool tool handle 12 penetrates into the dust collecting cover 15 and clamps the tool, and its outer end face is The bottom plate connecting surface 16 is provided with a bolt hole, and the tool mouth is mounted on the bottom plate connecting surface 16 through the bolt mounting hole 8, and the tool mouth is coaxial with the dust collecting cover 15. The inner hole of the dust collecting cover 15 close to the side of the telescopic cover box body 13 is slidably connected to a hollow cylinder. The center of the end of the cylinder is made into a through hole for the general machine tool handle 12 to pass through, and the two are clearance-matched. The cylinder and the inner hole of the dust collecting cover 15, the center hole 9 in the tool mouth and the oblique rib 11 form a dust collecting chamber. The drill chips discharged from the chip removal holes on the oblique rib 11 or the chip removal channels formed by the chip removal grooves 6 and the steps 5 on the tool are concentrated in the dust collecting chamber. A side hole 17 is opened on the side of the dust collecting cover 15 for connecting a chip suction pipe to discharge the drill chips in the dust collecting chamber, wherein the side hole 17 and the axis of the chip removal hole on the oblique rib 11 in the tool mouth are on the same plane.
[0025] When using:
[0026] The first step: insert the drilling part 1 tail handle of the tool into the general machine tool handle 12 of the tool holder and tighten it.
[0027] Step 2: Fit the circular bottom plate 7 of the cutting mouth with the bottom plate connecting surface 16 on the dust collecting cover 15, and connect it to the dust collecting cover 15 through the bolt mounting hole 8. Align the chip removal hole of the oblique rib 11 on the cutting mouth with the side hole 17 on the dust collecting cover 15 to ensure that the axes of the two holes are in the same plane. Finally, tighten the bolts connecting the cutting mouth and the dust collecting cover 15; the chip suction pipe on the side of the dust collecting cover 15 is connected to the exhaust device.
[0028] The third step: install the general machine tool handle 12 of the tool holder to the CNC machine tool to drill and countersink the product.
[0029] Move the tool holder and tool mouth to the vicinity of the product to be processed; the machine tool spindle rotates, and the tool holder 12 generally drives the tool to rotate; compressed air is introduced into the tool holder, the telescopic rod 14 extends, the dust cover 15 and the tool mouth extend, so that the tool is retracted in the dust cover 15, and the end of the secondary tool tip 4 does not exceed the end of the center hole 9 of the tool mouth; the tool mouth is brought into contact with the surface of the product to be processed and kept vertical; the length of the telescopic rod 14 is controlled, and the secondary tool tip 4 is quickly moved to a set distance from the surface of the product to be processed; the tool internal cooling and lubrication system is turned on, and the internal cooling hole 3 is used to cool the tool. After lubrication and cooling, the exhaust device is turned on to extract air from the inside of the dust hood 15. The air flows into the dust hood 15 through the center hole 9 and the small holes 10 at the end. The length of the telescopic round rod 14 is controlled by compressed air to realize the feeding of the tool. At the beginning of drilling, the drill chips are discharged into the dust hood 15 through the chip discharge holes on the oblique ribs 11. When drilling to a certain depth, the drill chips increase in size. The large drill chips are discharged into the dust hood 15 along the chip discharge channel formed by the chip discharge groove 6 and the step 5 on the tool. The drill chips in the dust hood 15 are discharged through the chip suction pipe and discharged into the collector.
[0030] The above-described embodiments merely express the implementation methods of the present invention, but should not be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.
Claims
1. A tool and tool holder system for drilling holes for engine hanging fasteners, characterized in that: The system includes a tool, a tool mouth, and a tool handle; The tool is a drill and countersink tool, comprising a drilling part (1), a countersink part (2), a secondary tool tip (4), a step (5), and a chip removal groove (6); the front part of the drilling part (1) is a drill bit, the rear part is a tail shank, the tip of the drill bit is provided with a secondary tool tip (4), and it is a small-diameter drill bit. The middle part of the drilling part (1) is provided with a countersink part (2), and the blades of the two are connected. The drill bit and the countersink part (2) are provided with a spiral chip removal groove (6), and the tail end of the countersink part (2) is provided with a small-diameter step (5) for cooperating with the chip removal groove (6), and the two form a chip removal channel; The knife tip comprises a circular bottom plate (7), a center hole (9), an end hole (10), and an oblique rib (11); a center hole (9) is provided at the center of the upper surface of the circular bottom plate (7), which is a cylinder with a center hole, and an end hole (10) is provided along the circumference of the top side wall of the cylinder for ventilation, and an oblique rib (11) is provided on the outer wall of one side of the cylinder with the center hole (9), the bottom end of which is connected to the circular bottom plate (7), and the top end is connected to the top of the cylinder with the center hole (9), and the connection is located below the end hole (10), and a lateral chip discharge hole is opened at the center of the upper edge of the oblique rib (11), and part of the drill cuttings are discharged into the dust collecting cover (15) of the knife handle through the chip discharge hole; The tool handle comprises a machine tool handle (12), a telescopic cover box body (13), a telescopic round rod (14), a dust collecting cover (15), a bottom plate connecting surface (16), and a side hole (17); the machine tool handle (12) is a main body, which is used to clamp the tail handle of the tool, and its outer cover is the telescopic cover box body (13), and a bearing is provided between the two, so that the telescopic cover box body (13) does not rotate with the machine tool handle (12), and a plurality of telescopic round rods (14) are provided inside the telescopic cover box body (13), and the ends of the telescopic round rods (14) are connected to the dust collecting cover (15), and the telescopic movement of the telescopic round rods (14) is controlled by introducing compressed air, thereby adjusting the distance between the dust collecting cover (15) and the telescopic cover box body (13); the dust collecting cover (15) is an annular structure, and the head of the machine tool handle (12) is deep. The tool is inserted into the dust collecting cover (15) and clamped, and its outer end surface is the bottom plate connecting surface (16), the tool mouth is installed on the bottom plate connecting surface (16), and the tool mouth is coaxial with the dust collecting cover (15), the inner hole of the dust collecting cover (15) close to the telescopic cover box body (13) is slidably connected with a hollow cylinder, the center of the cylinder end is made into a through hole for the machine tool handle (12) to pass through, and the two are clearance-matched, the cylinder and the inner hole of the dust collecting cover (15), the center hole (9) in the tool mouth and the oblique rib (11) form a dust collecting chamber, and the drill chips discharged from the chip discharge hole on the oblique rib (11) or from the chip discharge channel formed by the chip discharge groove (6) and the step (5) on the tool are concentrated in the dust collecting chamber, and the side of the dust collecting cover (15) is opened with a side hole (17) for connecting a chip suction pipe to discharge the drill chips in the dust collecting chamber; The chip removal hole on the oblique rib (11) is connected to the intersection of the center hole (9) and the circular bottom plate (7); The side hole (17) and the axis of the chip removal hole on the oblique rib (11) are on the same plane.
2. A tool and tool holder system for drilling holes for engine hanging fasteners according to claim 1, characterized in that: The drilling portion (1) is axially provided with an inner cooling hole (3), which is a through hole and is used for cooling and lubrication.
3. A tool and tool holder system for drilling holes for engine hanging fasteners according to claim 1, characterized in that: The edge of the circular bottom plate (7) is provided with a plurality of bolt mounting holes (8) along the circumference, and correspondingly, bolt holes are provided on the bottom plate connection surface (16), and the two realize fixed connection between the cutting head and the dust collecting cover (15) through a spiral.
4. A tool and tool holder system for drilling holes for engine hanging fasteners according to claim 3, characterized in that: The bolt mounting hole (8) is an oblong hole, the axis of which is parallel to the circumference, and a large hole is provided at one end of the oblong hole for the bolt head to pass through.
Citation Information
Patent Citations
PCD drilling and reaming integrated composite cutter suitable for machining carbon fiber composite material
CN110253055A
Aspirator
CN1302711A