Large-diameter straight pipe abrasive particle mirror polishing clamp

Abstract

A large-diameter straight pipe abrasive particle mirror surface polishing clamp comprises a large-diameter straight pipe to be polished and further comprises an upper flow guide disc, an outer annular feeding hole and a convex eave, the upper flow guide disc is installed at the top end of the large-diameter straight pipe, a lower flow guide disc is installed at the bottom end of the large-diameter straight pipe, a profiling core mold is arranged in the large-diameter straight pipe, and the outer annular feeding hole is formed in the outer annular feeding hole. Threaded columns are arranged at the two ends of the profiling core mold, threaded holes are formed in the positions, corresponding to the threaded columns, of the upper flow guide disc and the lower flow guide disc, an inner flow channel is formed between the profiling core mold and the large-diameter straight pipe, and inner annular feeding holes are formed in the positions, corresponding to the inner flow channel, of the upper flow guide disc and the lower flow guide disc. The large-diameter straight pipe polishing device is novel in structure and ingenious in conception, the large-diameter straight pipe can be fixed and polished conveniently, the inner surface or the outer surface of the large-diameter straight pipe can be selected to be polished according to needs, and the large-diameter straight pipe polishing device is good in applicability.

Description

Technical Field

[0001] The utility model relates to a polishing fixture, in particular to a large-caliber straight tube abrasive mirror polishing fixture. Background Art

[0002] The traditional polishing process for large-diameter straight tube parts is mainly mechanical grinding, such as honing and grinding. The characteristic of mechanical grinding is that micro-cutting and polishing are performed through the tool and the workpiece surface, so knife marks will be produced on the workpiece surface. The final roughness Ra that can be achieved is generally 0.2μm~0.8μm, which cannot meet the surface roughness requirements of Ra of 0.05μm~0.2μm under harsh conditions. In addition, for straight tubes with special coating materials on the surface, the machining tool will cause certain scratches on the coating on the wall of the straight tube, reduce the thickness and uniformity of the coating of the parts, and even partially peel off the coating from the substrate, thereby affecting the coating performance of the parts. In addition, if the large-diameter straight tube parts contain fine annular grooves and step structures inside, the tool for mechanical grinding cannot even be processed due to the limited accessibility of the tool. In addition, there are some common special processing methods such as chemical / electrochemical polishing, ultrasonic polishing and magnetic fluid polishing. The polishing liquid used in chemical / electrochemical polishing will corrode parts and have adverse effects on the environment. It is also selective to materials, and most materials cannot be polished using chemical / electrochemical polishing technology. Due to the low hardness of the magnetic needle used in magnetic fluid polishing, it cannot be polished when the material to be processed is harder than the magnetic needle. It is aimed at polishing straight tubes of different materials or polishing when there is a coating on the surface of the tube wall, and polishing when large-diameter straight tube parts contain fine annular grooves and step structures. The above polishing technologies have obvious limitations when the tube wall reaches a mirror polishing roughness Ra of 0.05μm to 0.8μm.

[0003] Abrasive flow polishing technology uses a viscoelastic creep fluid in a semi-flowing state to flow back and forth across the processed surface of the part under a certain pressure, and uses the extrusion and grinding effect of its abrasive particles to polish the material surface. It is a flexible micro-cutting precision polishing technology that can meet the polishing requirements of the surface roughness Ra of the polished parts to be 0.05μm to 0.8μm. Abrasive flow technology belongs to physical grinding and is basically not limited by the material to be processed. Abrasive flow polishing technology can ensure polishing efficiency and economy, and the processing process is automated and quantitatively controllable. Because its processing medium is fluid abrasive, it can polish the inner surface of special-shaped cavities, and is now widely used in the polishing of the inner cavity of pipe fittings. Abrasive flow polishing technology can also select different abrasive media to polish the pipe fittings according to the material of the pipe fittings, so as to obtain better polishing effects.

[0004] However, there are the following problems when using abrasive flow machining technology to mirror-polish the inner wall of a large-diameter straight pipe. During polishing, only the inner surface or the outer surface can be polished, and it is impossible to select according to actual needs, and the usability is insufficient. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a large-diameter straight tube abrasive mirror polishing fixture, which effectively solves the following problems that exist when using abrasive flow processing technology to mirror polish the inner wall of a large-diameter straight tube. When polishing, only the inner surface or the outer surface can be polished, and it cannot be selected according to actual needs, resulting in insufficient usability.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: the utility model includes a large-diameter straight pipe to be polished, and also includes an upper guide plate, a lower guide plate, a limit groove, a profiling core mold, a threaded column, a threaded hole, an inner flow channel, an inner annular feed hole, a bolt, an outer profiling tube, a bolt hole, an outer flow channel, an outer annular feed hole and a convex eaves, the top of the large-diameter straight pipe is equipped with an upper guide plate, the bottom of the large-diameter straight pipe is equipped with a lower guide plate, the interior of the large-diameter straight pipe is provided with a profiling core mold, both ends of the profiling core mold are provided with threaded columns, the upper guide plate and the lower guide plate are provided with threaded holes at positions corresponding to the threaded columns, an inner flow channel is formed between the profiling core mold and the large-diameter straight pipe, and the upper guide plate and the lower guide plate are provided with inner annular feed holes at positions corresponding to the inner flow channel;

[0007] An outer contour cylinder is installed on the upper guide plate and the lower guide plate outside the large-diameter straight pipe by bolts, and convex eaves are arranged at both ends of the outer contour cylinder. An outer flow channel is formed between the outer contour cylinder and the large-diameter straight pipe, and an outer annular feed hole is opened at the position of the upper guide plate and the lower guide plate corresponding to the outer flow channel.

[0008] Preferably, the upper guide plate and the lower guide plate are provided with limiting grooves at positions corresponding to the large-diameter straight pipes.

[0009] Preferably, a sealing gasket is provided between the large-diameter straight pipe and the limiting groove.

[0010] Preferably, a convex tube abutting against the end of the profiling core mold is provided in the middle of the inner side of the upper guide plate and the lower guide plate.

[0011] Preferably, bolt holes are provided on the convex eaves and at the bolt positions corresponding to the upper guide plate and the lower guide plate.

[0012] Preferably, both sides of the middle parts of the inner annular feed hole and the outer annular feed hole are not connected.

[0013] Beneficial effect: when the utility model is used, the upper guide plate is screwed together with the threaded column at the top of the profiling core mold. After the screwing is completed, the outer profiling tube is sleeved on the outside of the large-diameter straight pipe, and the large-diameter straight pipe is inserted into the limiting groove of the upper guide plate, and then the threaded hole of the lower guide plate is screwed on the threaded column at the bottom end of the profiling core mold, and the bolt holes opened on the convex eaves of the outer profiling tube are aligned with the bolt holes opened on the upper guide plate and the lower guide plate, and the upper bolts are screwed on to complete the installation. When polishing the inside, the abrasive flow polishing medium enters the inner flow channel from the inner annular feed hole, and the inner wall of the large-diameter straight pipe can be polished. When the outer currency of the large-diameter straight pipe needs to be polished, the abrasive flow polishing medium enters the inside of the outer flow channel from the outer annular feed hole, and the outer wall of the large-diameter straight pipe can be polished. It is convenient to select according to needs and has strong applicability. The utility model has novel structure and ingenious conception, is convenient for fixed polishing of large-diameter straight pipes, and can select inner surface or outer surface polishing according to needs, and has good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 This is a top view of the upper guide plate of the utility model;

[0018] Figure 4 This is a bottom view of the upper guide plate of the utility model;

[0019] Numbers in the figure: 1. Large-diameter straight pipe; 2. Upper guide plate; 3. Lower guide plate; 4. Limiting groove; 5. Profiling core mold; 6. Threaded column; 7. Threaded hole; 8. Inner flow channel; 9. Inner annular feed hole; 10. Bolt; 11. Outer profiling cylinder; 12. Bolt hole; 13. Outer flow channel; 14. Outer annular feed hole; 15. Convex eaves. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-4 The specific implementation modes of the present utility model are further described in detail.

[0021] Embodiment 1, by Figure 1-4The utility model provides a large-diameter straight tube abrasive mirror polishing fixture, including a large-diameter straight tube 1 to be polished, and also includes an upper guide plate 2, a lower guide plate 3, a limiting groove 4, a profiling core mold 5, a threaded column 6, a threaded hole 7, an inner flow channel 8, an inner annular feed hole 9, a bolt 10, an outer profiling cylinder 11, a bolt hole 12, an outer flow channel 13, an outer annular feed hole 14 and a convex eaves 15. The upper guide plate 2 is installed on the top of the large-diameter straight tube 1, and the lower guide plate 3 is installed on the bottom of the large-diameter straight tube 1. The profiling core mold 5 is arranged inside the large-diameter straight tube 1, and both ends of the profiling core mold 5 are arranged with threaded columns 6. The upper guide plate 2 and the lower guide plate 3 are provided with threaded holes 7 at positions corresponding to the threaded columns 6. An inner flow channel 8 is formed between the profiling core mold 5 and the large-diameter straight tube 1, and the upper guide plate 2 and the lower guide plate 3 are provided with inner annular feed holes 9 at positions corresponding to the inner flow channel 8.

[0022] An outer contour cylinder 11 is installed on the upper guide plate 2 and the lower guide plate 3 outside the large-diameter straight pipe 1 through bolts 10. Both ends of the outer contour cylinder 11 are provided with convex eaves 15. An outer flow channel 13 is formed between the outer contour cylinder 11 and the large-diameter straight pipe 1. An outer annular feed hole 14 is opened at the position of the upper guide plate 2 and the lower guide plate 3 corresponding to the outer flow channel 13.

[0023] Specific use: When the utility model is used, the upper guide plate 2 is screwed together with the threaded column 6 at the top of the profiling core mold 5. After the screw connection is completed, the outer profiling tube 11 is sleeved on the outside of the large-diameter straight pipe 1, and the large-diameter straight pipe 1 is inserted into the limit groove 4 of the upper guide plate 2, and then the threaded hole 7 of the lower guide plate 3 is screwed on the threaded column 6 at the bottom of the profiling core mold 5, and the bolt hole 12 opened on the convex eave 15 of the outer profiling tube 11 is connected with the bolt hole 12 opened on the upper guide plate 2 and the lower guide plate 3. The bolt holes 12 are aligned, and the bolts 10 are screwed on to complete the installation. When polishing the inside, the abrasive flow polishing medium enters the inner flow channel 8 from the inner annular feed hole 9, and the inner wall of the large-diameter straight pipe 1 can be polished. When the outer currency of the large-diameter straight pipe 1 needs to be polished, the abrasive flow polishing medium enters the outer flow channel 13 from the outer annular feed hole 14, and the outer wall of the large-diameter straight pipe 1 can be polished. It is easy to select according to needs and has strong applicability.

[0024] Beneficial effects: The utility model has a novel structure and an ingenious design, and is convenient for fixed polishing of a large-diameter straight pipe 1. At the same time, the inner surface or the outer surface can be polished according to needs, and the applicability is good.

[0025] Embodiment 2

[0026] In the first embodiment, the large diameter straight pipe 1 is inconvenient to install. Figure 1 As another preferred embodiment, the difference from the first embodiment is that the upper guide plate 2 and the lower guide plate 3 are provided with limiting grooves 4 at the positions corresponding to the large-diameter straight pipes 1 to facilitate the installation and polishing of the large-diameter straight pipes 1.

[0027] Embodiment 3

[0028] In the second embodiment, the large-diameter straight pipe 1 is not sufficiently sealed after installation. Figure 1 As another preferred embodiment, the difference from the second embodiment is that a sealing gasket is provided between the large-diameter straight pipe 1 and the limiting groove 4 to improve the sealing performance of the large-diameter straight pipe 1.

[0029] Embodiment 4

[0030] In the first embodiment, the profiling core mold 5 is inconvenient to install and use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that a convex tube abutting against the end of the profiling core mold 5 is provided in the middle of the inner side of the upper guide plate 2 and the lower guide plate 3 to facilitate the installation and use of the profiling core mold 5.

[0031] Embodiment 5

[0032] In the first embodiment, the bolt 10 is inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that bolt holes 12 are provided at the positions of the convex eaves 15 and the upper guide plate 2 and the lower guide plate 3 corresponding to the bolts 10 to facilitate the use of the bolts 10.

[0033] Embodiment 6

[0034] In the first embodiment, the inner annular feed hole 9 and the outer annular feed hole 14 are inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that the two sides of the middle of the inner annular feed hole 9 and the outer annular feed hole 14 are not connected, which facilitates the use of the inner annular feed hole 9 and the outer annular feed hole 14.

[0035] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A large-diameter straight tube abrasive mirror polishing fixture, comprising a large-diameter straight tube (1) to be polished, characterized in that: The large-diameter straight pipe (1) further comprises an upper guide plate (2), a lower guide plate (3), a limiting groove (4), a profiled core mold (5), a threaded column (6), a threaded hole (7), an inner flow channel (8), an inner annular feed hole (9), a bolt (10), an outer profiled cylinder (11), a bolt hole (12), an outer flow channel (13), an outer annular feed hole (14) and a convex eave (15). The upper end of the large-diameter straight pipe (1) is provided with an upper guide plate (2), and the lower end of the large-diameter straight pipe (1) is provided with a A profiling core mold (5) is provided inside the lower guide plate (3) and the large-diameter straight pipe (1), threaded columns (6) are provided at both ends of the profiling core mold (5), threaded holes (7) are provided at positions corresponding to the threaded columns (6) on the upper guide plate (2) and the lower guide plate (3), an inner flow channel (8) is formed between the profiling core mold (5) and the large-diameter straight pipe (1), and inner annular feed holes (9) are provided at positions corresponding to the inner flow channel (8) on the upper guide plate (2) and the lower guide plate (3); An outer profile cylinder (11) is mounted on the upper guide plate (2) and the lower guide plate (3) outside the large-diameter straight pipe (1) via bolts (10). Both ends of the outer profile cylinder (11) are provided with convex eaves (15). An outer flow channel (13) is formed between the outer profile cylinder (11) and the large-diameter straight pipe (1). An outer annular feed hole (14) is provided at a position corresponding to the outer flow channel (13) on the upper guide plate (2) and the lower guide plate (3).

2. The large-diameter straight tube abrasive mirror polishing fixture according to claim 1, characterized in that: The upper guide plate (2) and the lower guide plate (3) are both provided with limiting grooves (4) at positions corresponding to the large-diameter straight pipes (1).

3. The large-diameter straight tube abrasive mirror polishing fixture according to claim 2, characterized in that: A sealing gasket is provided between the large-diameter straight pipe (1) and the limiting groove (4).

4. The large-diameter straight tube abrasive mirror polishing fixture according to claim 1, characterized in that: A convex tube abutting against the end of the profiling core mold (5) is provided in the middle of the inner side of the upper guide plate (2) and the lower guide plate (3).

5. The large-diameter straight tube abrasive mirror polishing fixture according to claim 1, characterized in that: Bolt holes (12) are provided on the convex eaves (15) and at positions corresponding to the bolts (10) on the upper guide plate (2) and the lower guide plate (3).

6. The large-diameter straight tube abrasive mirror polishing fixture according to claim 1, characterized in that: Both sides of the middle portions of the inner annular feed hole (9) and the outer annular feed hole (14) are not connected.

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