An auxiliary cutting cooling system for finish machining of aircraft intersection holes

Abstract

The present invention relates to the field of aircraft assembly and manufacturing, and particularly to an auxiliary cutting cooling system for finish machining of aircraft intersection holes, which mainly consists of a compressed air source, a cutting fluid source, a filtering device, a gas-liquid mixing and regulating device, a three-way device, a nozzle, a chip collection device and a cutting fluid collection device. The present invention utilizes the gas-liquid mixing and regulating device to mix compressed air and cutting fluid, and adjusts the flow rate and mixing ratio of the cutting fluid and compressed air in a timely manner according to the working conditions; the cutting fluid and compressed air are mixed and sprayed to the cutting area through the nozzle, and the spraying direction and position can be adjusted according to the working conditions through the nozzle universal joint; the chip and cutting fluid collection devices can separately recycle chips and cutting fluid.

Description

Technical Field

[0001] The present invention relates to the field of aircraft assembly and manufacturing, and particularly to an auxiliary cutting cooling system for finish machining of aircraft intersection holes. Background Art

[0002] Before the installation and commissioning of an aircraft, it is necessary to perform finish reaming on the intersection holes of its wing lugs. Because the accuracy of the intersection holes plays a particularly crucial role in the smooth installation and commissioning of the wing-related components. Therefore, the design department has put forward high requirements for technical indicators such as the coaxiality of the intersection holes, the hole wall tolerance, and the minimum wall thickness. The finish machining of the intersection holes is difficult, and the risk of product out-of-tolerance and scrapping is relatively high.

[0003] The finish machining method of the intersection holes is that multiple groups of intersection holes are arranged in sequence, and the reamer cuts from one end of the multiple groups of intersection holes to the other end at one time. In order to reduce the cutting temperature and timely remove the chips, it is necessary to inject cutting fluid in a timely manner during the reaming process. The traditional cooling method for finish machining of intersection holes is that during the finish machining process, the operator uses a brush to apply cutting fluid to the cutting edge of the reamer and the intersection hole area. This method has a low cooling efficiency and an unsatisfactory cooling effect; the chip removal effect is poor, the chips are relatively obvious in aggregation, the tool jamming phenomenon occurs from time to time, seriously affecting the machining efficiency, and the chips scratch the hole wall, affecting the machining quality; at the same time, this cooling method requires special personnel to inject cutting fluid, consuming too much human and time resources; and the cutting fluid recovery efficiency is relatively low, which does not conform to the development concept of energy conservation and environmental protection. Summary of the Invention

[0004] To solve the above technical problems, based on the cooling requirements for finish machining of aircraft intersection holes, the present invention proposes a brand-new auxiliary cutting cooling system for finish machining of aircraft intersection holes. By using a gas-liquid mixing and regulating device, compressed air and cutting fluid are mixed, and the flow rate and mixing ratio of the cutting fluid and compressed air are adjusted in a timely manner according to the working conditions; the cutting fluid and compressed air are mixed and sprayed onto the cutting area through a nozzle, and the spraying direction and position can be adjusted according to the working conditions through a nozzle universal joint; the chip and cutting fluid collection device can separately recover chips and cutting fluid.

[0005] The present invention adopts the following technical solutions:

[0006] An auxiliary cutting cooling system for finish machining of aircraft intersection holes mainly consists of a compressed air source 1, a cutting fluid source 2, a filtering device 3, a gas-liquid mixing and regulating device 4, a three-way device 5, a nozzle 6, a chip collection device 7, and a cutting fluid collection device 8.

[0007] The said compressed air source 1 mainly consists of a compressed air pump a1-1 and an air pipe 1-2. The compressed air pump a1-1 prepares compressed air, and the air pipe 1-2 transports the compressed air to the gas-liquid mixing and regulating device 4.

[0008] The described cutting fluid source 2 mainly consists of a cutting fluid barrel and cutting fluid, and is used to supply cutting fluid.

[0009] The described filtering device 3 mainly consists of a filtering liquid inlet 3-1 and a cutting fluid pipe 3-2; a filter cotton net is wrapped around the filtering liquid inlet 3-1 and is placed in the cutting fluid source 2; one end of the cutting fluid pipe 3-2 is connected to the filtering liquid inlet 3-1, and the other end extends into the gas-liquid mixing and regulating device 4 to transport the filtered cutting fluid to the gas-liquid mixing and regulating device 4.

[0010] The filtering liquid inlet 3-1 is provided with a mesh structure, and the mesh diameter is not greater than 0.1 mm.

[0011] The described gas-liquid mixing and regulating device 4 mainly consists of a cutting fluid inlet 4-1, a compressed air inlet 4-2, a compressed air pump b 4-3, a spray outlet 4-6, and a magnet 4-7; the cutting fluid inlet 4-1 and the compressed air inlet 4-2 are arranged on the same side of the compressed air pump b 4-3, and the spray outlet 4-6 is arranged on the other side of the compressed air pump b 4-3; the magnet 4-7 is arranged at the bottom of the compressed air pump b 4-3 for fixing the gas-liquid mixing and regulating device; the air pipe 1-2 and the cutting fluid pipe 3-2 are respectively connected to the compressed air inlet 4-2 and the cutting fluid inlet 4-1, so that compressed air and cutting fluid respectively enter the compressed air pump b 4-3 from the compressed air inlet 4-2 and the cutting fluid inlet 4-1, and after mixing, they are sprayed out from the spray outlet 4-6.

[0012] The compressed air pump b 4-3 is provided with a cutting fluid regulating knob 4-4 and a compressed air regulating knob 4-5.

[0013] The magnet 4-7 is a cylinder with a diameter of 20-30 mm and a height of 3-5 mm.

[0014] The described three-way device 5 is respectively connected to the spray outlet 4-6 and the left and right nozzles 6, and the mixed liquid in the gas-liquid mixing and regulating device 4 is sprayed out from the two nozzles 6 after passing through the three-way device 5, realizing simultaneous spraying from the left and right nozzles in the finishing area.

[0015] The pipe diameter of the three-way device 5 is 5 mm - 15 mm.

[0016] The described nozzle 6 mainly consists of a universal joint delivery pipe 6-1, a spray port 6-2, and a regulating knob 6-3; one end of the universal joint delivery pipe 6-1 is connected to the three-way device 5, and the other end is connected to the spray port 6-2. The regulating knob 6-3 is arranged between the spray port 6-2 and the universal joint delivery pipe 6-1 for regulating the flow rate of the mixed spray.

[0017] The diameter of the spray port 6-2 is 2-3 mm.

[0018] The described chip collection device 7 is in a groove shape and is located below the finish machining cutting area to collect the chips falling from the finish machining area.

[0019] For the described chip collection device 7, the groove length is 1 - 1.5 m, the width is 0.5 m - 1 m, and the depth is at least 0.5 m.

[0020] The described cutting fluid collection device 8 is mainly composed of a drainage cloth 8 - 1 and a cutting fluid storage barrel 8 - 2, and is used to recover the sprayed cutting fluid; for the described drainage cloth 8 - 1, its initial end is fixed on the edge of the groove of the chip collection device 7, and its end extends into the cutting fluid storage barrel 8 - 2 to guide the cutting fluid to flow into the cutting fluid storage barrel 8 - 2.

[0021] The initial width of the described drainage cloth 8 - 1 is 2 - 3 m, and the length of the end of the drainage cloth placed in the cutting fluid storage barrel 8 - 2 is not less than 0.2 m; the capacity of the described cutting fluid storage barrel 8 - 2 is not less than 100 L.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. Through the gas - liquid mixing adjustment device, compressed air is mixed with the cutting fluid to form a spray and sprayed onto the finish machining area. Compared with the traditional cooling method, the cooling effect is greatly improved and the cooling efficiency is enhanced.

[0024] 2. Using compressed air, the chips generated in the finish machining area are timely blown away. Compared with the traditional cooling method, the chip accumulation is significantly reduced, the hole wall quality is greatly improved, the tool jamming phenomenon is effectively avoided, and the machining efficiency and machining quality are improved.

[0025] 3. The cooling system only requires one person to operate throughout the process. Compared with the traditional cooling method, there is no need for a special person to constantly brush the cutting fluid throughout the process, reducing the labor intensity and saving labor costs.

[0026] 4. Using the cutting fluid and chip collection device, the chips and cutting fluid are respectively collected, realizing the collection of chips and the recycling of the cutting fluid. Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the composition of the auxiliary cutting cooling system for the finish machining of the aircraft intersection hole;

[0028] Figure 2 It is a schematic diagram of the gas - liquid mixing adjustment device;

[0029] Figure 3 It is a schematic diagram of the structure of the filtering device;

[0030] Figure 4 It is a schematic diagram of the nozzle structure;

[0031] Figure 5This is a schematic structural diagram of a chip collection device and a cutting fluid collection device.

[0032] In the figure: 1 is a compressed air source; 1-1 is a compressed air pump a; 1-2 is an air pipe; 2 is a cutting fluid source; 3 is a filtering device; 3-1 is a filtering liquid inlet; 3-2 is a cutting fluid pipe; 4 is a gas-liquid mixing and adjusting device; 4-1 is a cutting fluid inlet; 4-2 is a compressed air inlet; 4-3 is a compressed air pump b; 4-4 is a cutting fluid adjusting knob; 4-5 is a compressed air adjusting knob; 4-6 is a spray outlet; 4-7 is a magnet; 5 is a three-way device; 6 is a nozzle; 6-1 is a universal joint delivery pipe; 6-2 is a nozzle injection; 7 is a chip liquid collection device; 8 is a cutting fluid collection device; 8-1 is a drainage cloth; 8-2 is a cutting fluid storage barrel. Detailed implementation manners

[0033] The following further describes the detailed implementation manners of the present invention in combination with the attached drawings and technical solutions.

[0034] As Figure 1 shown, an auxiliary cutting and cooling system for fine machining of aircraft intersection holes of the present invention mainly consists of a compressed air source 1, a cutting fluid source 2, a filtering device 3, a gas-liquid mixing and adjusting device 4, a three-way device 5, a nozzle 6, a chip collection device 7, and a cutting fluid collection device 8.

[0035] The compressed air source 1 provides compressed air for the auxiliary cutting and cooling system for fine machining, and mainly consists of two parts: a compressed air pump a 1-1 and an air pipe 1-2. The compressed air pump a 1-1 prepares compressed air, and the air pipe 1-2 transports the compressed air to the gas-liquid mixing and adjusting device.

[0036] The cutting fluid source 2 provides cutting fluid for the auxiliary cutting and cooling system for fine machining, and mainly consists of a cutting fluid barrel to ensure sufficient supply of cutting fluid during the fine machining process.

[0037] As Figure 3 shown, the filtering device 3 filters impurities in the cutting fluid and transports the filtered cutting fluid to the gas-liquid mixing and adjusting device 4. The filtering device 3 mainly consists of a filtering liquid inlet 3-1 and a cutting fluid pipe 3-2. The filtering liquid inlet 3-1 is placed in the cutting fluid source 2, and through the mesh and cotton mesh structure of the liquid inlet, the impurities in the cutting fluid are blocked outside the liquid inlet. To ensure effective blocking of impurities, the mesh diameter is not greater than 0.1 mm; the cutting fluid pipe 3-2 transports the filtered cutting fluid to the gas-liquid mixing and adjusting device 4.

[0038] The gas-liquid mixing and adjusting device 4 mixes and injects the compressed air and the cutting fluid, adjusts the ratio and flow rate of the cutting fluid and the compressed air according to the working conditions, and sends the cutting fluid and the compressed air in the form of a gas-liquid mixed spray to the nozzle for spraying.

[0039] As Figure 2As shown in the figure, the air-liquid mixing adjustment device consists of a cutting fluid inlet 4-1, a compressed air inlet 4-2, a compressed air pump b4-3, a cutting fluid adjustment knob 4-4, a compressed air adjustment knob 4-5, a spray outlet 4-6, and a magnet 4-7.

[0040] Compressed air enters the air-liquid mixing adjustment device 4 through the compressed air inlet 4-2, and the cutting fluid enters the air-liquid mixing adjustment device 4 through the cutting fluid inlet 4-1.

[0041] Clockwise adjustment of the cutting fluid 4-4 and the compressed air knob 4-5 can increase the flow rate of the cutting fluid and compressed air, and vice versa.

[0042] The mixed cutting fluid and compressed air are transported to the spray outlet 4-6 through the spray outlet.

[0043] The magnet 4-7 is located at the bottom of the air-liquid mixing adjustment device 4. During fine machining cutting, the magnet 4-7 fixes the air-liquid mixing device 4 on the upper surface of the fine machining table. The diameter of the magnet 4-7 is 20 - 30 mm, and the height is 3 - 5 mm.

[0044] The three-way device 5 can split the cutting fluid and compressed air mixture spray left and right. Through the three-way device 5, the left and right nozzles 6 in the fine machining area can be sprayed simultaneously, further improving the cooling efficiency.

[0045] As Figure 4 shown, the nozzle 6 sprays the mixed spray of cutting fluid and compressed air onto the fine machining cutting area, finally realizing the cutting cooling function. The nozzle 6 consists of a universal joint delivery pipe 6-1, a nozzle 6-2, and an adjustment knob 6-3. The universal joint delivery pipe 6-1 can adjust and fix the pipeline direction through the universal joint structure, thereby adjusting the spraying position of the nozzle 6-2. The adjustment knob 6-3 can adjust the flow rate of the mixed spray.

[0046] As Figure 5 shown, the chip collection device 7 is located below the fine machining cutting area, responsible for collecting the chips falling in the fine machining area to prevent the chips from mixing into the recycled cutting fluid. The chip collection device 7 is a groove-shaped structure.

[0047] As Figure 5 shown, the cutting fluid collection device 8 is responsible for recycling the sprayed cutting fluid. The cutting fluid collection device 8 consists of a drainage cloth 8-1 and a cutting fluid storage barrel 8-2. The front end of the drainage cloth 8-1 is fixed on the chip collection device 7, and the end extends into the cutting fluid storage barrel 8-2, responsible for receiving and guiding the cutting fluid into the cutting fluid storage barrel 8-2.

[0048] The specific usage process of the system of the present invention is as follows:

[0049] 1. Connect the compressed air source 1:

[0050] Connect the trachea 1-2 to the compressed air pump a1-1 and confirm that the connection is firm and reliable.

[0051] 2. Add cutting fluid:

[0052] Pour the cutting fluid into the cutting fluid bucket of the cutting fluid source 2.

[0053] 3. Place the filter cotton device 3:

[0054] Place the filter inlet 3-1 of the filter device 3 in the cutting fluid source to ensure that the filter inlet 3-1 is completely immersed in the cutting fluid.

[0055] 4. Install the air-liquid mixing adjustment device 4:

[0056] Connect the cutting fluid pipe 3-2 and the trachea 1-2 to the cutting fluid inlet 4-1 and the compressed air inlet 4-2 respectively. According to the finish machining position, adsorb the magnet 4-7 on the upper surface of the finish machining table.

[0057] 5. Connect the tee device 5:

[0058] Connect the spray outlet 4-6 and the universal joint delivery pipes 6-1 of the two nozzles 6 to the tee device 5 respectively.

[0059] 6. Install the cutting fluid collection device 8 and the chip collection device 7:

[0060] Place the chip collection device 7 below the finish machining area. Fix the front end of the drainage cloth 8-1 on the edge of the chip collection device 7, and the end is placed in the cutting fluid storage bucket 8-2.

[0061] 7. Start cooling:

[0062] Start the compressed air pump b4-3 in the air-liquid mixing adjustment device 4. The coolant and the compressed air are mixed in the air-liquid mixing adjustment device 4, flow through the universal joint delivery pipe 6-1, and are finally sprayed from the nozzle 6-2. During the spray cooling process, according to the finish machining cutting situation, rotate the cutting fluid adjustment knob 4-4 and the compressed air adjustment knob 4-5 to adjust the flow rates of the compressed air and the cutting fluid. Adjust the universal joint delivery pipe 6-1 to change the spray direction of the nozzle 6-2, and adjust the nozzle adjustment knob 6-3 to change the spray flow rate of the spray. According to the finish machining position, change the position of the magnet 4-7.

Claims

1. An auxiliary cutting and cooling system for finish machining of aircraft intersection holes, characterized in that, The described aircraft intersection hole finish machining auxiliary cutting and cooling system mainly consists of a compressed air source (1), a cutting fluid source (2), a filtering device (3), a gas-liquid mixing and regulating device (4), a three-way device (5), a nozzle (6), a chip collection device (7), and a cutting fluid collection device (8); The described compressed air source (1) mainly consists of a compressed air pump a (1-1) and an air pipe (1-2). The compressed air pump a (1-1) prepares compressed air, and the air pipe (1-2) transports the compressed air to the gas-liquid mixing and regulating device (4); The described filtering device (3) mainly consists of a filtering liquid inlet (3-1) and a cutting fluid pipe (3-2); A filter cotton net is wrapped on the filtering liquid inlet (3-1) and placed in the cutting fluid source (2); One end of the cutting fluid pipe (3-2) is connected to the filtering liquid inlet (3-1), and the other end extends into the gas-liquid mixing and regulating device (4) to transport the filtered cutting fluid into the gas-liquid mixing and regulating device (4); The described gas-liquid mixing and regulating device (4) mainly consists of a cutting fluid inlet (4-1), a compressed air inlet (4-2), a compressed air pump b (4-3), a spray outlet (4-6), and a magnet (4-7); The cutting fluid inlet (4-1) and the compressed air inlet (4-2) are arranged on the same side of the compressed air pump b (4-3), and the spray outlet (4-6) is arranged on the other side of the compressed air pump b (4-3); The magnet (4-7) is arranged at the bottom of the compressed air pump b (4-3) for fixing the gas-liquid mixing and regulating device; The air pipe (1-2) and the cutting fluid pipe (3-2) are respectively connected to the compressed air inlet (4-2) and the cutting fluid inlet (4-1), so that compressed air and cutting fluid respectively enter the compressed air pump b (4-3) from the compressed air inlet (4-2) and the cutting fluid inlet (4-1), and after mixing, they are sprayed out from the spray outlet (4-6); The described three-way device (5) is respectively connected to the spray outlet (4-6) and the left and right nozzles (6). The mixed liquid in the gas-liquid mixing and regulating device (4) is sprayed out from the two nozzles (6) after passing through the three-way device (5), realizing simultaneous spraying from the left and right nozzles in the finish machining area; The described nozzle (6) mainly consists of a universal joint conveying pipe (6-1), a spray port (6-2), and an adjustment knob (6-3); One end of the universal joint conveying pipe (6-1) is connected to the three-way device (5), and the other end is connected to the spray port (6-2). The adjustment knob (6-3) is arranged between the spray port (6-2) and the universal joint conveying pipe (6-1) for adjusting the flow rate of the mixed spray; The described chip collection device (7) is in a groove shape and is located below the finish machining cutting area to collect the chips falling in the finish machining area; The described cutting fluid collection device (8) mainly consists of a drainage cloth (8-1) and a cutting fluid storage barrel (8-2) for recovering the sprayed cutting fluid; The initial end of the drainage cloth (8-1) is fixed on the groove edge of the chip collection device (7), and its end extends into the cutting fluid storage barrel (8-2) to guide the cutting fluid into the cutting fluid storage barrel (8-2).

2. The finishing auxiliary cutting and cooling system for aircraft intersection holes according to claim 1, characterized in that, The described compressed air pump b(4 - 3) is provided with a cutting fluid adjustment knob(4 - 4) and a compressed air adjustment knob(4 - 5).

3. An auxiliary cutting and cooling system for finish machining of aircraft intersection holes according to claim 1, characterized in that, The described magnet(4 - 7) is a cylinder with a diameter of 20 - 30 mm and a height of 3 - 5 mm.

4. The finishing auxiliary cutting and cooling system for aircraft intersection holes according to claim 1, characterized in that The described filter liquid inlet(3 - 1) is provided with a mesh structure, and the mesh diameter is not greater than 0.1 mm.

5. An auxiliary cutting and cooling system for finish machining of aircraft intersection holes according to claim 1, characterized in that, The described cutting fluid source(2) mainly consists of a cutting fluid barrel and cutting fluid, and is used for supplying cutting fluid.

6. The auxiliary cutting and cooling system for finish machining of aircraft intersection holes according to claim 1, characterized in that The pipeline diameter of the described three - way device(5) is 5 mm - 15 mm.

7. An auxiliary cutting and cooling system for finish machining of aircraft intersection holes according to claim 1, characterized in that, The diameter of the described nozzle(6 - 2) is 2 - 3 mm.

8. An auxiliary cutting and cooling system for finish machining of aircraft intersection holes according to claim 1, characterized in that, The described chip collection device(7) has a groove length of 1 - 1.5 m, a width of 0.5 m - 1 m, and a depth of at least 0.5 m.

9. An auxiliary cutting and cooling system for finish machining of aircraft intersection holes according to claim 1, characterized in that, The initial width of the described drainage cloth(8 - 1) is 2 - 3 m, and the length of the end of the drainage cloth placed in the cutting fluid storage barrel(8 - 2) is not less than 0.2 m; the capacity of the described cutting fluid storage barrel(8 - 2) is not less than 100 L.

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