Aerosol delivery device

Abstract

The application discloses a kind of pneumatic weakening groove polishing devices, including pneumatic drill gun, gas nozzle, milling cutter, drill gun clamp, pedestal, the gas nozzle and milling cutter are respectively arranged at the two ends of pneumatic drill gun, gas nozzle is connected with gas source by hose, the pneumatic drill gun is arranged in the upper portion of pedestal by drill gun clamp, the front stop block and rear stop block are connected on the pedestal, the inclined surface of rear stop block is in contact with the inclined surface of drill gun clamp, the lower portion of the pedestal is equipped with front guide block and rear guide block.The application guarantees the reliability, stability and applicability of weakening groove blockage dredging processing for different types of weakening groove;It can significantly improve the operation efficiency of fitter dredging weakening groove blockage and ensure that the shape, size and surface quality after processing meet the design requirements.

Description

Technical Field

[0001] This invention belongs to the field of manufacturing technology for large structural components of aerospace equipment, and relates to a pneumatic weakening groove grinding device. Background Technology

[0002] After more than 60 years of development, China has gradually transformed from a major spacefaring nation into a leading spacefaring power. With the continuous development of my country's space technology capabilities and the further improvement of its socio-economic level, various departments and fields have placed broader demands on space launches. The demanding space launch missions have also placed higher requirements on the production of space equipment.

[0003] Large structural components of aerospace equipment serve as key functional components of large spacecraft, playing crucial roles in load-bearing, carrying loads, and fuel storage. These components require strict weight control and often contain numerous weakening grooves. However, the TIG welding process widely used in the production of large aerospace equipment structural components inevitably leads to the blockage and breakage of these weakening grooves. The following problems arise when dealing with these blocked weakening groove areas:

[0004] 1. To ensure welding quality, TIG welding involves multiple layers, resulting in a large accumulation of material at the weakening groove blockage after welding.

[0005] 2. Many large structural components of aerospace equipment are irregularly shaped. The inner and outer shapes of the shells of these irregularly shaped components are all spline curves. The weakening grooves will form irregular curved grooves following the shape. The difficulty of blocking and clearing such curved grooves is extremely high.

[0006] 3. Weakening grooves often contain multiple blockages and have large allowances, making manual grinding by fitters inefficient. Furthermore, as a critical feature, weakening grooves have very high requirements for dimensions and surface quality, severely testing the fitter's skill level.

[0007] Therefore, in order to solve the above problems, a grinding device is needed to assist fitters in weakening, blocking, and unblocking grooves. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pneumatic weakening groove grinding device.

[0009] To achieve the above objectives, the present invention employs the following technical solutions:

[0010] A pneumatic weakening groove grinding device includes a pneumatic drill gun, an air nozzle, a milling cutter, a drill gun clamp, and a base. The air nozzle and the milling cutter are respectively located at both ends of the pneumatic drill gun. The air nozzle is connected to an air source through a hose. The pneumatic drill gun is located on the upper part of the base through the drill gun clamp. A front stop block and a rear stop block are connected to the base. The inclined surface of the rear stop block contacts the inclined surface of the drill gun clamp. A front guide block and a rear guide block are provided at the lower part of the base.

[0011] As a preferred embodiment, the base also has an oblong hole through which the pneumatic drill gun and milling cutter pass, allowing the drill gun holder, pneumatic drill gun, and milling cutter to be adjusted in position on the base. After removing the front and rear stop blocks, the positions of the drill gun holder, pneumatic drill gun, and milling cutter on the base can be adjusted to meet different grinding processing conditions.

[0012] In a further preferred embodiment, the front guide block and the rear guide block are connected to the base via cylindrical pins, and the distance between the front guide block and the rear guide block and the base is adjustable, which can accommodate grinding processes with different groove depths.

[0013] Further preferably, the front guide block and the rear guide block are each provided with a through slot. The through slot, located near the contact position with the workpiece weakening groove, allows for elastic deformation upon contact with the weakening groove being ground, resulting in more accurate positioning.

[0014] In a further preferred embodiment, the front guide block and the rear guide block are each equipped with a guide bearing, which can convert some of the sliding friction into rolling friction during grinding, making it easier for the device to move along the direction of the weakening groove during use.

[0015] Preferably, the front stop block and the rear stop block are connected to the base by a threaded connection.

[0016] This invention uses a power source commonly found in large structural component manufacturing workshops as the power unit; it can form a simple positioning fit with the weakening groove; the positioning module and cutting depth can be adjusted according to different weakening groove specifications and processing conditions; it has a simple and reliable structure and a modular design concept, ensuring the reliability and stability of the weakening groove blocking and unblocking processing and its applicability to different types of weakening grooves; it can significantly improve the efficiency of fitter unblocking weakening grooves and ensure that the dimensional and surface quality of the processed parts meet the design requirements.

[0017] The present invention has the following advantages:

[0018] 1. It adopts a modular design approach, which allows for quick replacement of the cutting module and guide module to adapt to different grinding conditions.

[0019] 2. The cutting module adopts a traditional pneumatic forming milling cutter, which has the characteristics of convenient loading and unloading, stable output, convenient and simple power source.

[0020] 3. The guide module is stable in positioning and precise in guiding, which can ensure the shape, size and surface quality of the weakening groove after grinding.

[0021] 4. The structure is simple, the design is reasonable, and the positioning is reliable. It reduces the skill level required for fitter to grind the weakening groove and overcomes the problems of large dimensional errors, poor surface accuracy, and low production efficiency when fitters manually grind the weakening groove in the production of large structural parts of aerospace equipment. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the working state of the present invention.

[0025] In the diagram: 1-cylindrical pin, 2-front stop block, 3-rear stop block, 4-pneumatic drill gun, 5-air nozzle, 6-front guide block, 7-guide bearing, 8-milling cutter, 9-drill gun clamp, 10-base, 11-rear guide block. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings.

[0027] 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.

[0028] Example:

[0029] As attached Figure 1 , 2 As shown in Figure 3, a pneumatic weakening groove grinding device includes a cylindrical pin 1, a front stop block 2, a rear stop block 3, a pneumatic drill 4, an air nozzle 5, a front guide block 6, a guide bearing 7, a milling cutter 8, a drill rig clamp 9, a base 10, and a rear guide block 11. The drill rig clamp 9 uses threads to securely hold the pneumatic drill 4. The pneumatic drill 4 has an air nozzle 5 at its end, which can be connected to an air source via a hose to provide power for the rotary cutting motion of the milling cutter 8. The front stop block 2 and the rear stop block 3 are connected to the base 10 via threads. The inclined surface of the rear stop block 3 contacts the inclined surface of the drill rig clamp 9, and the friction generated by the thread preload fixes the pneumatic drill 4 in a suitable position. A waist-shaped hole is opened in the middle of the base 10. After removing the front stop block 2 and the rear stop block 3, the positions of the drill rig clamp 9, the pneumatic drill 4, and the milling cutter 8 on the base 10 can be adjusted to meet different grinding processing conditions. The front guide block 6 and the rear guide block 11 are connected to the base 10 via cylindrical pins 1. The distance between the front guide block 6 and the rear guide block 11 and the base 10 is adjustable to accommodate grinding processes with different groove depths. Two through slots are opened near the contact position with the workpiece weakening groove, which can undergo elastic deformation when in contact with the weakening groove being ground, making the positioning more accurate. In addition, guide blocks of appropriate specifications can be selected according to the groove width of the weakening groove to effectively grind the weakening groove. Guide bearings 7 are installed on both sides of the guide blocks, which can convert some sliding friction into rolling friction during grinding, making it easier for the device to move along the direction of the weakening groove during use.

[0030] The operating procedure is as follows: 1. Select a suitable guide block according to the target machining weakening groove size. Insert and fix the guide block in the weakening groove.

[0031] 2. After the device is fixed in the weakening groove, loosen the stop block and the cylindrical pin, and adjust the lateral and longitudinal positions of the milling cutter in the sealing groove to meet the normal machining conditions.

[0032] 3. Once everything is ready, connect the air nozzle to the high-pressure air source via the air pipe, turn on the pneumatic drill gun switch, and you can begin the grinding and blocking of the weakening groove. During operation, manually push the device slowly along the direction of the weakening groove to complete the grinding and unblocking work in the target area.

[0033] This gas-powered weakening groove grinding device allows for the replacement of guide mechanisms according to different weakening groove specifications; it facilitates easy adjustment of grinding height and position; and it reliably positions itself on the weakening groove to ensure the stability of the grinding process for the fitter. This device enables controllable grinding of weakening grooves in large aerospace structural components, overcoming the previous limitation of manual grinding by fitters. It significantly improves the production efficiency of fitters grinding and clearing welded weakening grooves in the production of large aerospace structural components, while reducing processing difficulty and skill requirements for fitters. Furthermore, it improves the dimensional accuracy and surface finish of the weakening groove after grinding, ensuring the production quality of large aerospace structural components. In practical use, it can increase the production efficiency of the weakening groove grinding process by approximately four times.

[0034] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A pneumatic weakening groove grinding device for grinding and unblocking clogged areas of weakening grooves, characterized in that: It includes a pneumatic drill gun (4), an air nozzle (5), a milling cutter (8), a drill gun clamp (9), and a base (10). The air nozzle (5) and the milling cutter (8) are respectively located at both ends of the pneumatic drill gun (4). The air nozzle (5) is connected to an air source through a hose. The pneumatic drill gun (4) is located on the upper part of the base (10) through the drill gun clamp (9). The base (10) has a waist-shaped hole through which the pneumatic drill gun (4) and the milling cutter (8) pass. The drill gun clamp (9), the pneumatic drill gun (4) and the milling cutter (8) can be adjusted to their positions on the base (10). The base (10) is connected to a front stop block (2) and a rear stop block (3), and the inclined surface of the rear stop block (3) is in contact with the inclined surface of the drill gun clamp (9). The lower part of the base (10) is provided with a front guide block (6) and a rear guide block (11). The front guide block (6) and the rear guide block (11) are connected to the base (10) by a cylindrical pin (1), and the distance between the front guide block (6) and the rear guide block (11) and the base (10) is adjustable. In the working state, the front guide block (6) and the rear guide block (11) are engaged and fixed in the polished and weakened groove; The front guide block (6) and the rear guide block (11) have through slots near the contact position with the workpiece weakening groove, and guide bearings (7) are respectively installed on both sides of the front guide block (6) and the rear guide block (11).

2. The pneumatic weakening groove grinding device according to claim 1, characterized in that: The front stop block (2) and the rear stop block (3) are connected to the base (10) by a threaded connection so that the inclined surface of the rear stop block (3) presses against the inclined surface of the drill gun clamp (9) by the thread preload.

3. The pneumatic weakening groove grinding device according to claim 1, characterized in that: The drill gun clamp (9) holds the pneumatic drill gun (4) by threaded fastening.

4. The pneumatic weakening groove grinding device according to claim 1, characterized in that: The front guide block (6) and the rear guide block (11) are replaceable guide blocks, and their specifications are matched with the groove width of the target machining weakening groove.

5. The pneumatic weakening groove grinding device according to claim 1, characterized in that: There are two through slots, which are located on the front guide block (6) and the rear guide block (11) near the contact position with the workpiece weakening groove, so that the front guide block (6) and the rear guide block (11) can undergo elastic deformation when they come into contact with the weakening groove being polished.

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