Self-cooling resin binder grinding wheel for grinding inner wall of steel pipe

Abstract

The utility model discloses a self-cooling resin binder grinding wheel for grinding the inner wall of a steel pipe, and relates to the technical field of grinding wheels. Comprising an outer grinding layer, a core layer and an inner ring, wherein the core layer is located on the inner side of the outer grinding layer, and the inner ring is located on the inner side of the core layer; and the outer grinding layer is formed by compounding a first resin binder, a submicron fine-grained grinding material and ceramic gel and is used for grinding the inner wall of the steel pipe. The outer grinding layer is arranged, the outer grinding layer is formed by compounding the first resin binding agent, the submicron fine-grained grinding material and the ceramic gel, the hollow glass microspheres and the hollow aluminum oxide microspheres are added into the ceramic gel, and due to the unique hollow structures of the hollow glass microspheres and the hollow aluminum oxide microspheres, the wear resistance of the ceramic gel is improved, and the service life of the ceramic gel is prolonged. Closed air holes can be formed in the grinding wheel, the air holes are beneficial to containing abrasive dust generated in the grinding process, the grinding wheel is prevented from being blocked, and the grinding performance of the grinding wheel is kept.

Description

Technical Field

[0001] This utility model relates to the field of grinding wheel technology, specifically a self-cooling resin-bonded steel pipe inner wall grinding wheel. Background Technology

[0002] Seamless steel pipes, widely used in oil pipelines, natural gas pipelines, nuclear power generation pipes, and high-pressure boilers, are large-scale special-purpose transport steel pipes. They are used in oil pipelines, natural gas pipelines, nuclear power generation pipes, and high-pressure boiler tubes. The pipe diameter ranges from 73-700 mm, and the typical length is 12 meters. Grinding with a grinding wheel results in a length of 9-12 meters. After the steel pipe billet undergoes a hot rolling and piercing process, the grinding wheel is mounted on an internal grinding machine and inserted into the pipe body to grind the inner wall. However, the grinding process generates sparks, causing heat to accumulate and become difficult to dissipate. The high temperature range and the tendency for the bonding agent in ordinary grinding wheels to carbonize reduce the bonding agent's holding power, making the grinding wheel less wear-resistant and prone to breakage accidents. Utility Model Content

[0003] The purpose of this invention is to provide a self-cooling resin-bonded steel pipe inner wall grinding wheel to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a self-cooling resin-bonded steel pipe inner wall grinding wheel, comprising:

[0005] Outer grinding layer, core layer, and inner ring;

[0006] The core layer is located inside the outer grinding layer, and the inner ring is located inside the core layer.

[0007] The outer grinding layer is composed of a first resin binder, submicron-sized fine-grained grinding material, and ceramic gel, and is used to grind the inner wall of the steel pipe.

[0008] The core layer consists of a second resin binder and fine-grained abrasive, which supports and fixes the outer grinding layer and helps to dissipate heat from the outer grinding layer.

[0009] Preferably, the first resin binder is a phenolic resin binder or a binder of epoxy resin and polyurethane resin.

[0010] Preferably, the submicron-sized fine-grained grinding material is one or both of ceramic microcrystalline calcined corundum and zirconium corundum.

[0011] Preferably, hollow glass microspheres and hollow alumina microspheres are added to the ceramic gel.

[0012] Preferably, an annular fixing block is also fixed between the core layer and the inner ring.

[0013] Preferably, the core layer has an annular groove inside, and both sides of the core layer have side holes that communicate with the annular groove, with a wind collection hood provided on the outside of one of the side holes.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This self-cooling resin-bonded steel pipe inner wall grinding wheel has an outer grinding layer. This outer grinding layer is composed of a first resin binder, submicron-sized fine-grained grinding materials, and a ceramic gel. Hollow glass microspheres and hollow alumina microspheres are added within the ceramic gel. Due to their unique hollow structure, these microspheres form closed pores within the grinding wheel. These pores not only help to contain grinding debris generated during grinding, preventing wheel clogging and maintaining grinding performance, but also facilitate the formation of new cutting edges during grinding, thus maintaining the wheel's self-sharpening properties, reducing wear and dulling, and extending its service life. A grinding wheel with good self-sharpening properties can more effectively remove workpiece material, improving grinding efficiency. Furthermore, the pores act as heat dissipation channels, helping to dissipate heat generated during grinding in a timely manner, thereby achieving self-cooling of the grinding wheel.

[0016] Meanwhile, an annular groove, side holes, and an air collector are also provided on the core layer. When the grinding wheel rotates, outside air can enter the annular groove through the air collector and the side hole on one side of the air collector, thereby exchanging heat with the hot air in the annular groove. Finally, it is discharged through the side hole on the other side, thereby further improving the self-cooling efficiency of the grinding wheel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a half-sectional view of the present invention.

[0019] In the diagram: 1. Outer grinding layer; 2. Core layer; 3. Annular fixing block; 4. Inner ring; 501. Annular groove; 502. Side hole; 503. Air collection hood. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] The grinding wheel in this solution is used to grind the inner wall of a large-diameter pipe to solve the problems of poor heat dissipation and lack of wear resistance in existing grinding wheels.

[0022] like Figure 1 - Figure 2 As shown, this utility model provides a technical solution: a self-cooling resin-bonded steel pipe inner wall grinding wheel, comprising:

[0023] The outer grinding layer 1, the core layer 2, and the inner ring 4 are provided. The core layer 2 is located inside the outer grinding layer 1, and the inner ring 4 is located inside the core layer 2. To improve the connection stability between the outer grinding layer 1 and the core layer 2, stepped surfaces are provided on both sides of the core layer 2, and extensions are formed on both sides of the outer grinding layer 1. The extensions are adapted to the stepped surfaces.

[0024] The outer grinding layer 1 is composed of a first resin binder, submicron-sized fine-grained grinding material, and ceramic gel, and is used to grind the inner wall of the steel pipe. Specifically, the first resin binder is either a phenolic resin binder or a binder of epoxy resin and polyurethane resin. Both of these binders have good high-temperature resistance, thus adapting to the high temperatures generated during grinding. The submicron-sized fine-grained grinding material is either ceramic microcrystalline calcined corundum or zirconium corundum. Both of these materials have high hardness, high wear resistance, and high high-temperature resistance, which can ensure that the grinding wheel maintains stable cutting ability during high-speed grinding. In addition, hollow glass microspheres and hollow alumina microspheres are added to the ceramic gel.

[0025] It is important to know that hollow glass microspheres and hollow alumina microspheres, due to their unique hollow structure, can form closed pores in the grinding wheel. These pores not only help to contain the grinding debris generated during the grinding process, preventing the grinding wheel from clogging and maintaining its grinding performance, but the presence of pores also makes it easier for the grinding wheel to form new cutting edges during the grinding process, thereby maintaining the self-sharpening property of the grinding wheel, reducing wear and dulling, and thus extending the service life of the grinding wheel. Grinding wheels with good self-sharpening properties can more effectively remove workpiece material and improve grinding efficiency.

[0026] In addition, the pores serve as heat dissipation channels, helping to dissipate the heat generated during grinding in a timely manner, thereby achieving self-cooling of the grinding wheel.

[0027] The core layer 2 is composed of a second resin binder and fine-grained abrasive, which is used to support and fix the outer grinding layer 1 and help dissipate heat from the outer grinding layer 1. The fine-grained abrasive can be diamond powder with good thermal conductivity.

[0028] In one specific embodiment of this solution, in order to improve heat conduction performance and ensure the overall strength of the grinding wheel, an annular fixing block 3 made of stainless steel is fixed between the core layer 2 and the inner ring 4. In this way, some of the heat in the outer grinding layer 1 and the core layer 2 can be dissipated through the side wall of the annular fixing block 3 by heat conduction.

[0029] like Figure 2 As shown, in another specific embodiment of this solution, an annular groove 501 is provided inside the core layer 2, and side holes 502 communicating with the annular groove 501 are provided on both sides of the core layer 2. An air collecting hood 503 made of ceramic material or other high-temperature resistant material is provided on the outside of one side hole 502. The opening direction of the air collecting hood 503 is the same as the rotation direction of the grinding wheel. In this way, when the grinding wheel rotates, the outside air can enter the annular groove 501 through the air collecting hood 503 and the side hole 502 on one side of the air collecting hood 503, thereby exchanging heat with the hot air in the annular groove 501, and finally being discharged through the side hole 502 on the other side, thereby further improving the self-cooling efficiency of the grinding wheel.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A self-cooled resin bond pipe wall dressing wheel characterized by, The application relates to a steel pipe inner wall grinding device, which comprises the following parts: an outer grinding layer (1), a core layer (2) and an inner ring (4); the core layer (2) is located on the inner side of the outer grinding layer (1), and the inner ring (4) is located on the inner side of the core layer (2); the outer grinding layer (1) is composed of a first resin binder, sub-micron fine-grained grinding material and ceramic gel and is used for grinding the inner wall of a steel pipe; the core layer (2) is composed of a second resin binder and fine-grained abrasive and is used for supporting and fixing the outer grinding layer (1) and helping to dissipate heat of the outer grinding layer (1).

2. A self-cooled resin bond abrasive cylinder wall dressing wheel according to claim 1, wherein The first resin binder is a phenolic resin binder or one of an epoxy resin and a polyurethane resin binder.

3. A self-cooled resin bond abrasive cylinder wall dressing wheel according to claim 1, wherein The sub-micron fine-grained grinding material is one or both of ceramic microcrystal calcined corundum and zirconium corundum.

4. The self-cooled resin bond steel pipe inner wall lapping wheel of claim 1, wherein, The ceramic gel is added with hollow glass microspheres and hollow alumina microspheres.

5. A self-cooled resin bond abrasive cylinder wall dressing wheel according to claim 1 wherein, An annular fixing block (3) is further fixed between the core layer (2) and the inner ring (4).

6. A self-cooled resin bond abrasive cylinder wall dressing wheel according to claim 1 wherein, An annular groove (501) is arranged in the inner side of the core layer (2), side holes (502) are arranged on the two sides of the core layer (2) and are communicated with the annular groove (501), and a wind collecting cover (503) is arranged on the outer side of the side hole (502) on one side.

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