Multi-specification fuel filter screen machining tool

Abstract

The invention provides a multi-specification fuel filter screen machining tool which comprises a rolling core rod and a rolling wheel and is suitable for forming machining of fuel filter screens. The rolling wheel is rotated to drive the rolling core rod to rotate, and the filter screen is placed in a gap between the rolling wheel and the rolling core rod for rolling forming. The tool is provided with the adjustable supporting plate and the pressing plate, the machining gap is accurately controlled through the adjusting bolt, and the machining requirements of the filter screens with different thicknesses are met. The filter screen is automatically separated through the baffle in the machining process, one-time bending forming is achieved, and manual disassembly and uneven deformation in traditional machining are avoided. The rolling wheels are made of polytetrafluoroethylene materials, and it is guaranteed that indentations or micro-cracks cannot be generated in the machining process. The machining precision can be effectively improved, manual operation is reduced, the production efficiency is improved, and the machining requirements of fuel filter screens of various specifications are met.

Description

Technical Field

[0001] The present invention relates to the technical field of aeroengines, and particularly relates to a processing tool for fuel filters of multiple specifications. Background Art

[0002] Fuel filters are crucial for aviation kerosene filters in the aerospace field. They are used to filter metal debris and other impurities generated due to wear in the fuel system oil circuit of engines, keep the oil clean, and extend the service life of the system. Due to the importance of fuel filters in aeroengines, the traditional processing methods of oil filters have seriously affected the product quality and the urgent market demand. Fuel filters are mainly made of woven steel wires. According to different materials, diameters of the steel wires, and mechanical properties of the materials, the processing has different difficulties. Currently, processing methods such as manual bending and fixture extrusion are used for the bending and forming of filters, but each has its own deficiencies. The current production status and processing problems are as follows: 1. When using manual bending to form, the magnitude of the bending force cannot be controlled during processing, which is extremely likely to cause inconsistent deformation of the oil filter during the bending process and cannot effectively guarantee the lap requirements after processing. 2. When using split-type fixtures, it is necessary to first manually pre-bend and form during processing, and then put it into the fixture and force it to bend and form with the help of a bench vice to ensure the product process dimensions. Due to a 1-mm gap in the split-type fixture to ensure that the oil filter is inclusively clamped and formed, there are varying degrees of indentations or pits on the outer surface after actual bending and forming, resulting in the scrapping of some products with pits on the outer circle. Summary of the Invention

[0003] The purpose of the present invention is to provide a processing tool for fuel filters of multiple specifications to solve the problems in the prior art, including the inability to control the bending force in manual bending, the indentations and pits generated by split-type fixtures, etc., and improve the processing accuracy and product quality.

[0004] The present invention is realized by the following technical solutions: A processing tool for fuel filters of multiple specifications, characterized in that it includes a rolling mandrel and a rolling wheel. There is a certain gap between the rolling mandrel and the rolling wheel. The filter is placed in this gap and the rolling wheel is rotated to drive the rolling mandrel to rotate, so that the filter is rolled and formed along the rolling mandrel.

[0005] Further, the rolling wheel is driven to rotate by a rotating handle. A handle mandrel is arranged on the rotating handle, and the rolling wheel is connected to the handle mandrel.

[0006] Further, the handle mandrel passes through two vertical plates and is rotatably connected to the vertical plates. The bottoms of the vertical plates are fixed on the base by mounting bolts.

[0007] Further, both ends of the rolling mandrel are respectively connected to adjustable support plates. An installation groove is provided above the vertical plate. The adjustable support plates are inserted into the installation groove and can move up and down along the installation groove.

[0008] Further, a pressing plate is also provided above the vertical plate. The pressing plate is fixedly connected to the vertical plate, and the adjustable support plates are located between the vertical plate and the pressing plate. The pressing plate is bolted to the vertical plate through adjusting bolts. By rotating the adjusting bolts, the position of the adjustable support plates is adjusted, thereby adjusting the gap between the rolling mandrel and the rolling wheel.

[0009] Further, a baffle is also provided between the vertical plates. The baffle is located in front of the rolling mandrel and the rolling wheel. The filter screen enters the gap between the rolling mandrel and the rolling wheel from below the baffle. The inlet end of the filter screen rotates to three-quarters of the circumference, is blocked by the baffle and automatically separated, realizing automatic separation during one-time bending and forming.

[0010] Further, the rolling wheel is made of polytetrafluoroethylene material with strong toughness and high density. During the bending process, the filter screen grid is embedded into the surface of the rolling wheel to a certain extent, thereby increasing the friction and generating strong adhesion, and the non-stick property avoids defects such as indentation and microcracks during the bending process.

[0011] The beneficial effects of the multi-specification fuel filter screen processing tooling described in the present invention include: Improve processing accuracy: Through the design of adjustable support plates and adjusting bolts, precise control of the gap between the rolling mandrel and the rolling wheel is achieved, avoiding the problems of filter screen deformation and uneven hemming in traditional processing methods.

[0012] One-time forming and automatic separation: The filter screen is automatically separated by the baffle when it is processed to three-quarters of a circle, simplifying the operation process, improving production efficiency, and reducing manual intervention.

[0013] Avoid indentation and microcracks: The polytetrafluoroethylene rolling wheel is used, which has good toughness and non-stick property, avoiding defects such as indentation and microcracks during the processing, and ensuring the surface quality of the filter screen.

[0014] Adapt to multi-specification processing: By replacing the rolling mandrel, it can support the processing of filter screens with diameters of 2.5 - 10 mm and different thicknesses, avoiding the disadvantages of traditional manual rolling. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0016] Figure 1 Structural schematic diagram of the present invention; Figure 2 is Figure 1 Schematic A-A cross-sectional view in Figure 3 is Figure 2 Partial schematic view at position B in In the figure, 1 - adjusting bolt, 2 - pressing plate, 3 - adjustable support plate, 4 - vertical plate, 5 - rotating handle, 6 - rolling mandrel, 7 - handle mandrel, 8 - rolling wheel, 9 - mounting bolt, 10 - base, 11 - baffle, 12 - filter screen. Specific embodiments

[0017] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0019] As Figures 1-3 shown, a processing tool for fuel filters of multiple specifications includes a rolling mandrel 6 and a rolling wheel 8. There is a certain gap between the rolling mandrel 6 and the rolling wheel 8. By placing the filter screen 12 into the gap and rotating the rolling wheel 8, the rolling mandrel 6 is driven to rotate by friction, so that the filter screen 12 is roll-formed along the rolling mandrel 6.

[0020] The rolling wheel 8 is driven to rotate by a rotating handle 5. A handle mandrel 7 is provided on the rotating handle 5. The rolling wheel 8 is connected to the handle mandrel 7. The handle mandrel 7 passes through two vertical plates 4 and is rotatably connected to the vertical plates 4. The bottom of the vertical plates 4 is fixed to the base 10 by mounting bolts 9.

[0021] Both ends of the rolling mandrel 6 are respectively connected to adjustable support plates 3. An installation groove is provided above the vertical plates 4. The adjustable support plates 3 are inserted into the installation groove and can move up and down along the installation groove. A pressing plate 2 is also provided above the vertical plates 4. The pressing plate 2 is fixedly connected to the vertical plates 4. The adjustable support plates 3 are located between the vertical plates 4 and the pressing plate 2. The pressing plate 2 is bolted to the vertical plates 4 through adjusting bolts 1. By rotating the adjusting bolts 1, the position of the adjustable support plates 3 is adjusted, thereby adjusting the gap between the rolling mandrel 6 and the rolling wheel 8.

[0022] A baffle plate 11 is further arranged between the vertical plates 4. The baffle plate 11 is located in front of the rolling mandrel 6 and the rolling wheel 8. The filter screen 12 enters the gap between the rolling mandrel 6 and the rolling wheel 8 from below the baffle plate 11. The inlet end of the filter screen 12 rotates to three-quarters of the circumference, is blocked by the baffle plate 11 and automatically separated, realizing automatic separation during one-time bending and forming.

[0023] The rolling wheel 8 is made of polytetrafluoroethylene with strong toughness and high density. During the actual bending process, since the mesh of the filter screen 12 is partially embedded in the surface of the rolling wheel 8, it effectively increases the friction, generates strong adhesion, and highlights the non-stick property of the surface of the rolling wheel 8, eliminating defects such as indentation and microcracks after bending.

[0024] According to the thickness of the filter screen 12, the gap is adjusted by the adjustable bolt 1 (the gap is 0 when the thickness is less than 0.10 mm, and the gap is 1 / 2 of the filter screen thickness when the thickness is 0.1 - 0.4 mm). The fuel filter screen with a thickness of 0.1 - 0.4 mm can be processed by adjusting the gap.

[0025] By replacing the rolling mandrel 6, the fuel filter screen with a diameter between 2.5 - 10 mm can be processed and formed in one step, filling the processing drawbacks of manual roll forming for those with a diameter less than 5 mm in the market and the industry.

[0026] In the above embodiments, the basic principles, main features, and advantages of the present invention are described. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, any changes and modifications made by those skilled in the art should fall within the protection scope of the appended claims of the present invention.

Claims

1. A processing tool for fuel filters of multiple specifications, characterized in that, It includes a rolling mandrel (6) and a rolling wheel (8). There is a certain gap between the rolling mandrel (6) and the rolling wheel (8). The filter screen (12) is placed into this gap, and by rotating the rolling wheel (8), the rolling mandrel (6) is driven to rotate, so that the filter screen (12) is roll-formed along the rolling mandrel (6).

2. The processing tooling for multi-specification fuel filters according to claim 1, wherein The rolling wheel (8) is driven to rotate by a rotating handle (5). A handle mandrel (7) is arranged on the rotating handle (5), and the rolling wheel (8) is connected to the handle mandrel (7).

3. The processing tooling for multi-specification fuel filters according to claim 2, wherein The handle mandrel (7) passes through two vertical plates (4) and is rotatably connected to the vertical plates (4). The bottoms of the vertical plates (4) are fixed on a base (10) by mounting bolts (9).

4. A multi-specification fuel filter processing tooling according to claim 3, characterized in that Both ends of the rolling mandrel (6) are respectively connected to adjustable support plates (3). There is a mounting groove above the vertical plates (4). The adjustable support plates (3) are inserted into the mounting groove and can move up and down along the mounting groove.

5. A processing tool for multi-specification fuel filters according to claim 4, characterized in that, There is also a pressing plate (2) above the vertical plates (4). The pressing plate (2) is fixedly connected to the vertical plates (4). The adjustable support plates (3) are located between the vertical plates (4) and the pressing plate (2). The pressing plate (2) is bolted to the vertical plates (4) through adjusting bolts (1). By rotating the adjusting bolts (1), the position of the adjustable support plates (3) is adjusted, and further the gap between the rolling mandrel (6) and the rolling wheel (8) is adjusted.

6. A multi-specification fuel filter processing tooling according to claim 4, characterized in that There is also a baffle (11) between the vertical plates (4). The baffle (11) is located in front of the rolling mandrel (6) and the rolling wheel (8). The filter screen (12) enters the gap between the rolling mandrel (6) and the rolling wheel (8) from below the baffle (11). When the inlet end of the filter screen (12) rotates to three-quarters of the circumference, it is blocked by the baffle (11) and automatically separated, realizing automatic separation during one-time bending forming.

7. A processing tool for multi-specification fuel filters according to claim 1, characterized in that, The rolling wheel (8) is made of polytetrafluoroethylene material with strong toughness and high density. During the bending process, the meshes of the filter screen (12) are embedded into the surface of the rolling wheel (8) to a certain extent, thus increasing the friction and generating strong adhesion, and the non-stick property avoids defects such as indentations and microcracks during the bending process.

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