Grinding auxiliary tool for composite material pressure container lining for winding machine

Abstract

The utility model discloses an auxiliary grinding tool for a composite material pressure container lining for a winding machine, which comprises a fixed seat, a support frame, a U-shaped bracket, a connecting plate, a winding machine switching disc, a pulling plate and a rotating wheel, the fixed seat is composed of baffles on two sides and a base, and the fixed seat is fixedly connected with a threaded hole in the head of an angle grinder and the support frame respectively; rotating wheels are fixedly mounted on the two sides of the bottom of the fixed seat respectively, and the rotating wheels on the two sides are connected with the U-shaped bracket through rotating screws respectively to form a rotating mechanism; the two U-shaped brackets are fixedly installed on the end face of the connecting ring. The connecting plate and the pulling plate are fixedly installed on the two sides of the winding machine switching disc, and the winding machine switching disc is fixedly connected with the winding machine. The angle grinder solves the problems that the efficiency is low, the labor intensity is high, the working environment is severe, and the uniformity of grinding machining is difficult to guarantee when an angle grinder is manually held by hand for grinding, and is simple in structure, light in weight, easy to machine, low in manufacturing and maintenance cost, convenient to operate and good in using effect.

Description

Technical Field

[0001] This invention relates to a grinding fixture for linings, specifically to a grinding auxiliary fixture for composite material pressure vessel linings used in winding machines. Background Technology

[0002] Composite material pressure vessels are crucial components in aerospace engineering, enduring the ablation, pressure, and erosion forces generated by propellant combustion during operation. Their linings possess ablation resistance and heat insulation properties, protecting the pressure vessel from burn-through or strength reduction due to heat. Therefore, the design and manufacturing of the lining are critical to engine performance and safety. Due to the unique characteristics of composite material pressure vessels, their inner linings require grinding. Currently, grinding is typically performed by placing the pressure vessel on the spindle of a winding machine. Because the lining has an irregular curved surface and is a highly elastic material, manual grinding with a hand-held angle grinder is still used. The angle of the grinding wheel and the grinding depth are mainly controlled by hand, which is not only inefficient and labor-intensive, but also creates a harsh working environment and makes it difficult to ensure uniform grinding, leading to quality problems or even scrapping of the engine casing, resulting in significant losses. Therefore, there is an urgent need to design an auxiliary tooling for grinding the lining of composite material pressure vessels on a winding machine. This tooling would fix the angle grinder on the winding machine, eliminating manual labor while ensuring uniform lining wall thickness, thus improving the production efficiency and quality of composite material combustion chamber casings.

[0003] Due to the unique characteristics of composite material pressure vessels, their inner linings require grinding. Currently, the pressure vessel is typically ground on the spindle of a winding machine. Because the lining is an irregular curved surface and made of highly elastic material, manual grinding with a handheld angle grinder is still used. When grinding with a handheld angle grinder, the angle of the grinding wheel and the grinding depth are mainly controlled by hand strength. This is not only inefficient and labor-intensive, but also creates a harsh working environment and makes it difficult to ensure the uniformity of the grinding process. This can lead to quality problems with the engine casing, or even its complete failure, resulting in significant losses. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a grinding auxiliary tooling for composite material pressure vessel linings for winding machines, so as to solve the problems of low efficiency, high labor intensity, harsh working environment, and difficulty in ensuring the uniformity of grinding when manually using a handheld angle grinder.

[0005] To address the existing technical problems, the present invention adopts the following technical solution: a grinding auxiliary fixture for composite material pressure vessel linings of a winding machine, comprising a fixed base, a support frame, a U-shaped bracket, a connecting plate, a winding machine adapter plate, a pull plate, and rotating wheels. The fixed base consists of baffles on both sides and a base. Smooth holes are opened at the front and rear ends of the baffles on both sides of the fixed base, which are respectively fixedly connected to the threaded holes at the angle grinder head and the support frame. Rotating wheels are respectively installed and fixed on both sides of the bottom of the fixed base. The rotating wheels on both sides are respectively connected to the U-shaped bracket through rotating screws to form a rotating mechanism to realize the rotation of the fixture. Two U-shaped brackets are respectively installed and fixed on the end face of the connecting ring. The connecting plate and the pull plate are installed and fixed on both sides of the winding machine adapter plate, and the winding machine adapter plate is connected and fixed to the winding machine. The support frame is installed and fixed on the end face of the connecting ring, and with the assembled rotating screw as the center, multiple smooth holes are evenly distributed on the left and right side plates of the support frame, and are connected to the fixed base by positioning pins.

[0006] Furthermore, the front and rear ends of the baffles on both sides of the fixed base of the present invention are arc-shaped, and all sharp parts are chamfered. The front end of the baffle is adjusted to a corresponding angle according to the needs of placing and fitting the angle grinder.

[0007] Furthermore, the baffles on both sides of the fixed base of the present invention are respectively provided with arc-shaped grooves, which facilitates better control of the angle grinder's switch.

[0008] Furthermore, the grinding auxiliary tooling of the present invention also includes a pressure belt, which is connected to the rear part of the upper end face of the baffle on both sides of the fixed base for fixing the angle grinder.

[0009] Beneficial effects

[0010] This invention's auxiliary tooling is specifically designed for the irregular and highly elastic characteristics of composite pressure vessel linings. By fixing an angle grinder to a winding machine, it solves the problems of low efficiency, high labor intensity, harsh working environment, and difficulty in ensuring uniform grinding caused by manual hand-held angle grinders. It eliminates manual labor while ensuring uniform lining wall thickness, improving the production efficiency and quality of composite combustion chamber shells. Furthermore, the auxiliary tooling includes a rotating mechanism and positioning holes at different angles on a support frame, connected to the winding machine. The rotating mechanism and positioning holes work together to grind linings of different thicknesses and angles; the forward and backward movement and 360° rotation of the winding machine allow for grinding of linings at different positions. This invention's auxiliary tooling has a simple structure, is lightweight, easy to manufacture, has low manufacturing and maintenance costs, is convenient to operate, and provides good performance. Attached Figure Description

[0011] Figure 1A schematic diagram of the auxiliary tooling for grinding the inner lining of a composite pressure vessel of the present invention. The components in the diagram are: 1-fixed seat, 2-support frame, 3-U-shaped bracket, 4-connecting plate, 5-winding machine adapter plate, 6-pull plate, 7-pressure band, 8-positioning pin, 9-rotating wheel, 10-rotating screw.

[0012] Figure 2 Left view of the auxiliary tooling for grinding the inner lining of the composite material pressure vessel of the present invention;

[0013] Figure 3 A top view of the auxiliary tooling for grinding the inner lining of the composite material pressure vessel of the present invention;

[0014] Figure 4 A schematic diagram of the structure of the winding machine adapter plate of the present invention;

[0015] Figure 5 A schematic diagram showing the connection between the auxiliary tooling and the adapter ring of this invention. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments and accompanying drawings. The specific embodiments are only used to further illustrate the present invention and do not constitute a limitation on the claims of the present invention.

[0017] like Figure 1-3 As shown, an auxiliary tooling for grinding the inner lining of composite pressure vessels using a winding machine mainly consists of a fixed base 1, a support frame 2, a U-shaped bracket 3, a connecting plate 4, a winding machine adapter plate 5, a pull plate 6, a pressure band 7, a positioning pin 8, a rotating wheel 9, and a rotating screw 10. To reduce the tooling's weight and cost, except for the bolts, nuts, positioning pins, and rotating screw which are made of 45# steel, all other components are made of aluminum.

[0018] Figure 1-3 This is a schematic diagram of the auxiliary tooling for grinding the inner lining of a composite pressure vessel. The fixed base 1 consists of two side baffles and a base, each with a thickness of 15mm. The width and length of the fixed base 1 are designed according to the shape and size of the angle grinder. The front and rear ends of the baffles are designed to be arc-shaped, and all sharp parts are chamfered to avoid injury to people and equipment. The front baffle has a certain angle to facilitate better placement and fit of the angle grinder. The front and rear ends of the left and right baffles of the fixed base 1 are provided with smooth holes, which are fixedly connected to the threaded holes at the head of the angle grinder and the support frame 2, respectively. Two threaded holes are provided at the rear of the upper end face to fix two pressure bands 7. At the same time, two arc-shaped grooves are provided on both sides of the left and right baffles to facilitate better control of the angle grinder's switching on and off.

[0019] Weld a rotating wheel 9 to the bottom of the fixed base 1, ensuring a firm weld. After welding, connect the rotating wheel 9 and the two U-shaped brackets 3 together with a rotating screw 10, and tighten the nuts at both ends to form a rotating mechanism to achieve the rotation of the tooling. Weld the two U-shaped brackets 3 to the end face of the connecting ring 4, ensuring a firm weld.

[0020] like Figure 1 As shown, the support frame 2 is welded to the end face of the connecting ring 4. With the assembled rotating screw 10 as the center, four smooth holes are opened on the left and right side plates of the support frame 2 at 5° intervals. Each hole corresponds to a different angle and is connected by a positioning pin 8 and a fixing seat 1.

[0021] like Figure 4 As shown, the winding machine adapter plate 5 is connected to the winding machine via bolts through four countersunk holes; as Figure 5 As shown, the connecting plate 4 and the pull plate 6 are fixed to both sides of the winding machine adapter plate 5 by long bolts, and the connecting plate 4 is fastened with nuts to achieve a firm connection between the entire auxiliary tooling and the winding machine.

[0022] After assembling all the auxiliary fixtures and connecting them to the winding machine, place the angle grinder on the fixed base 1 of the auxiliary fixture, and connect the angle grinder and the fixed base 1 with bolts. Then, use two pressure bands 7 to further fix the angle grinder to prevent it from shifting during the grinding process. According to the required grinding angle of the lining, rotate the rotating mechanism to the corresponding angle, insert the positioning pin 8 into the corresponding hole of the support frame 2, and repeat the above operation to achieve grinding of linings of different thicknesses and angles. In addition, this auxiliary fixture is connected to the winding machine, and the grinding of the lining at different positions can be achieved by moving the winding machine back and forth and rotating it 360°.

[0023] The auxiliary tooling of this invention has been applied and verified in the grinding of the inner linings of several composite pressure vessels. The ground inner linings have uniform thickness, and the production efficiency and quality of composite pressure vessels are greatly improved.

Claims

1. A grinding auxiliary fixture for the inner lining of a composite pressure vessel using a winding machine, comprising a fixed base (1), a support frame (2), a U-shaped bracket (3), a connecting plate (4), a winding machine adapter plate (5), a pull plate (6), and a rotating wheel (9), characterized in that: The fixed seat (1) consists of baffles on both sides and a base. The front and rear ends of the baffles on both sides of the fixed seat (1) are opened with smooth holes, which are fixedly connected to the threaded holes at the head of the angle grinder and the support frame (2). Rotating wheels (9) are installed and fixed on both sides of the bottom of the fixed seat (1). The rotating wheels (9) on both sides are connected to the U-shaped bracket (3) through the rotating screw (10) to form a rotating mechanism to realize the rotation of the tooling. The two U-shaped brackets (3) are installed and fixed on the end face of the connecting plate (4). The connecting plate (4) and the pull plate (6) are installed and fixed on both sides of the winding machine transfer plate (5). The winding machine transfer plate (5) is connected and fixed to the winding machine. The support frame (2) is installed and fixed on the end face of the connecting plate (4), and with the assembled rotating screw (10) as the center, multiple smooth holes are evenly distributed on the left and right side plates of the support frame (2), and are connected by positioning pins (8) and fixing seats (1).

2. The grinding auxiliary tooling according to claim 1, characterized in that: The front and rear ends of the baffles on both sides of the fixed seat (1) are arc-shaped, and all sharp parts are chamfered. The front end of the baffle is adjusted to the required angle according to the needs of placing and fitting the angle grinder.

3. The grinding auxiliary tooling according to claim 1, characterized in that: The baffles on both sides of the fixed base (1) are respectively provided with arc-shaped grooves, which facilitates better control of the angle grinder's switch.

4. The grinding auxiliary tooling according to claim 1, characterized in that: The grinding auxiliary tooling also includes a pressure belt (7), which is connected to the rear part of the upper end face of the baffle on both sides of the fixed base (1) for fixing the angle grinder.

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