Supporting air expansion shaft for machining of large thick-wall cylindrical composite material workpiece
By designing the support gas expansion shaft of the gas expansion shaft mandrel, flange and rubber gas expansion tube, the high cost and inner wall damage of large inner diameter thick wall cylindrical composite parts during machining, achieving a low-cost and low-damage fixing effect.
Patent Information
- Application Number
- CN202422337817.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-09-25
AI Technical Summary
There is a lack of special gas expansion shaft tooling in the prior art. Ordinary gas expansion shafts have small sizes and improper materials, resulting in high cost of large inner diameter thick wall cylindrical composite parts during machining, damage to the inner wall and high requirements for equipment bearing.
A support gas expansion shaft including a gas expansion shaft mandrel, a flange and an air expansion tube is designed. The gas expansion tube is made of rubber, and the large inner diameter thick wall cylindrical composite material is fixed through spiral pipe grooves and inflation to avoid mechanical damage.
It achieves low cost and low production difficulty, avoids inner wall damage, reduces the load-bearing requirements for machining equipment, and improves product quality.
Smart Images
Figure CN223277215U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of composite material processing, in particular to a supporting air expansion shaft used for machining large-scale thick-walled cylindrical composite material parts. Background Art
[0002] Composite materials can combine the advantages of various constituent materials to make one material have multiple properties, including properties that natural materials do not have. For example, glass fiber reinforced epoxy composite materials have strength similar to that of steel, as well as the dielectric properties and corrosion resistance of plastics. In addition, composite materials can be designed and manufactured according to performance requirements, and can be made into products of any shape required, avoiding multiple processing steps. Therefore, they are widely used in many fields, such as large, thick-walled cylindrical composite parts required in industrial and agricultural production processes.
[0003] When cutting, grinding, and other machining operations are performed on large-diameter, thick-walled cylindrical composite parts, they need to be mounted on machining equipment using tooling. However, there are currently no dedicated pneumatic shaft tooling available on the market. Conventional key-type or slat-type pneumatic shafts used for rewinding and unwinding are typically modified to the appropriate dimensions for use. However, the following problems may arise during use:
[0004] ① The size of common inflatable shafts of key-type or slat-type currently used for rewinding and unwinding on the market is generally small. If they are used to support thick-walled cylindrical composite products with large inner diameters, they need to be specially customized, which is costly.
[0005] ② Improper selection of key strips or strips of ordinary inflatable shafts will cause certain damage to the inner wall of thick-walled cylindrical composite products with large inner diameters.
[0006] ③ The thick-walled cylindrical composite product with a large inner diameter is very heavy in itself, and the specially made ordinary inflatable shaft is also very heavy due to its large size. The combined weight of the two requires a higher load-bearing capacity of the machining equipment. Utility Model Content
[0007] The purpose of the utility model is to provide a supporting air expansion shaft for machining large thick-walled cylindrical composite material parts, so as to solve the problems raised in the above background technology.
[0008] To achieve the above objectives, the present invention provides the following technical solutions:
[0009] A supporting inflatable shaft for machining large, thick-walled, cylindrical composite parts, comprising an inflatable shaft core shaft for positioning and clamping with machining equipment, an inflatable shaft body being provided in the middle of the outer side of the inflatable shaft core shaft, flanges being installed at both ends of the inflatable shaft body, a spiral pipe groove being provided on the outer side of the inflatable shaft body, and an inflatable tube being laid on the inner side of the pipe groove, a plug being installed at the tail end of the inflatable tube, and an inflation valve being installed at the inflation end of the inflatable tube.
[0010] As a further solution of the present invention: the inflatable shaft body and the flange are fixedly connected by bolts, and the flange is fixed to the inflatable shaft core shaft by welding.
[0011] As a further solution of the present invention: through holes are opened on both the left and right ends of the outer side of the inflatable shaft body, the tail end of the inflatable tube passes through the through hole at the right end and penetrates into the interior of the inflatable shaft body, and the inflatable end of the inflatable tube passes through the through hole at the left end and extends from the interior of the inflatable shaft body to the outside of the flange.
[0012] As a further solution of the present invention: the inflatable tube is a component made of rubber material.
[0013] As a further solution of the present invention: the cross section of the tube groove is sector-shaped, and the central angle of the sector is 210° to 240°.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] The utility model mainly consists of an inflatable shaft core shaft, a flange, an inflatable shaft body and an inflatable tube. It has a simple structure and is easy to use. It does not require excessive load-bearing requirements for machining equipment. It has low processing difficulty, short production cycle and low cost. At the same time, the elastic inflatable tube is used to fix the large inner diameter and thick-walled cylindrical composite material parts, without causing mechanical damage to the interior thereof, thereby improving the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of a supporting air expansion shaft used for machining large, thick-walled cylindrical composite parts;
[0017] Figure 2 The figure is a working diagram of a supporting air expansion shaft used for machining large thick-walled cylindrical composite parts.
[0018] In the figure: 1. Large inner diameter, thick-walled cylindrical composite component; 2. Inflatable shaft core; 3. Flange; 4. Inflatable shaft body; 5. Inflatable tube; 6. Tube groove; 7. Contact surface; 8. Inflating valve; 9. Plug. DETAILED DESCRIPTION
[0019] See also Figures 1-2 In an embodiment of the utility model, a supporting inflatable shaft for machining large thick-walled cylindrical composite parts includes an inflatable shaft core shaft 2 for cooperating with machining equipment for positioning and clamping, an inflatable shaft body 4 is provided in the middle of the outer side of the inflatable shaft core shaft 2, and flanges 3 are installed at both ends of the inflatable shaft body 4. A spiral pipe groove 6 is opened on the outer side of the inflatable shaft body 4, and an inflatable tube 5 is laid on the inner side of the pipe groove 6. A plug 9 is installed at the tail end of the inflatable tube 5, and the plug 9 can be used to seal the tail end of the inflatable tube 5; an inflation valve 8 is installed at the inflation end of the inflatable tube 5, and the inflatable tube 5 can be inflated by the inflation valve 8 to expand the inflatable tube 5.
[0020] Preferably, the inflatable shaft body 4 and the flange 3 are fixedly connected by bolts, and the flange 3 is fixed to the inflatable shaft core shaft 2 by welding, so that the inflatable shaft core shaft 2, the flange 3 and the inflatable shaft body 4 can form an integral structure.
[0021] Preferably, through holes are provided on both the left and right ends of the outer side of the inflatable shaft body 4. The tail end of the inflatable tube 5 passes through the through hole at the right end and penetrates into the interior of the inflatable shaft body 4. The inflation end of the inflatable tube 5 passes through the through hole at the left end and extends from the interior of the inflatable shaft body 4 to the outside of the flange 3, thereby facilitating the use of external inflation equipment to inflate the inflatable tube 5 from the inflation valve 8.
[0022] Preferably, the inflatable tube 5 is made of rubber material, so that the inflatable tube 5 has greater elastic deformation after inflation, which can better fix the large inner diameter thick wall cylindrical composite material product 1 on the inflatable shaft body 4.
[0023] Preferably, the cross section of the tube groove 6 is sector-shaped, and the central angle of the sector is 210° to 240°, so that the inflatable tube 5 is not likely to fall off from the tube groove 6 during the process of inflating the inflatable tube 5 .
[0024] The working principle of the utility model is as follows: first, select an inflatable shaft body 4 that matches the inner diameter of a large inner diameter thick-walled cylindrical composite material part 1, and then put the large inner diameter thick-walled cylindrical composite material part 1 on the inflatable shaft body 4, as shown in FIG. Figure 2 As shown, the inflatable shaft core shaft 2 is then installed on the machining equipment; then, the inflatable tube 5 is inflated from the inflation valve 8 using an external inflation device. After the inflatable tube 5 is fully inflated, the inflation valve 8 is closed to stop inflation; the inflatable tube 5 is squeezed against the inner wall of the large inner diameter, thick-walled cylindrical composite material part 1 to form a contact surface 7. The large inner diameter, thick-walled cylindrical composite material part 1 is then securely mounted on the inflatable shaft body 4, and the large inner diameter, thick-walled cylindrical composite material part 1 can then be machined accordingly using the machining equipment.
[0025] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A supporting air shaft for machining large thick-walled cylindrical composite parts, comprising an air shaft core shaft (2) for positioning and clamping with machining equipment, characterized in that: An inflatable shaft body (4) is provided in the middle of the outer side of the inflatable shaft core shaft (2), flanges (3) are installed at both ends of the inflatable shaft body (4), a spiral pipe groove (6) is opened on the outer side of the inflatable shaft body (4), and an inflatable tube (5) is laid on the inner side of the pipe groove (6), a plug (9) is installed at the tail end of the inflatable tube (5), and an inflation valve (8) is installed at the inflation end of the inflatable tube (5).
2. The supporting air expansion shaft for machining large thick-walled cylindrical composite material parts according to claim 1, characterized in that: The inflatable shaft body (4) and the flange (3) are fixedly connected by bolts, and the flange (3) is fixed to the inflatable shaft core shaft (2) by welding.
3. The supporting air expansion shaft for machining large thick-walled cylindrical composite material parts according to claim 1, characterized in that: Through holes are provided at both left and right ends of the outer side of the inflatable shaft body (4); the tail end of the inflatable tube (5) passes through the through hole at the right end and penetrates into the interior of the inflatable shaft body (4); the inflatable end of the inflatable tube (5) passes through the through hole at the left end and extends from the interior of the inflatable shaft body (4) to the outside of the flange (3).
4. The supporting air expansion shaft for machining large thick-walled cylindrical composite parts according to claim 1, characterized in that: The inflation tube (5) is a component made of rubber material.
5. The supporting air expansion shaft for machining large thick-walled cylindrical composite material parts according to claim 1, characterized in that: The cross section of the tube groove (6) is fan-shaped, and the central angle of the fan-shaped circle is 210° to 240°.