Large-size wear-resistant inner-layer barrel for sand mill and manufacturing method of large-size wear-resistant inner-layer barrel

Abstract

The invention relates to a large-size wear-resistant inner-layer barrel for a sand mill and a manufacturing method of the large-size wear-resistant inner-layer barrel. The invention discloses a manufacturing method of a large-size wear-resistant inner-layer barrel for a sand mill. The manufacturing method comprises the following steps: S1, manufacturing a cylindrical first barrel body with a hollow interior; s2, preparing a plurality of barrel body tiles; s3, the first barrel body is integrally heated to 123 DEG C, and at the moment, it is guaranteed that the assembling gap between the first barrel body and the second barrel body is set to be 0.66 mm; s4, then, a plurality of barrel body tiles are evenly attached to the inner side wall face of the first barrel body in the circumferential direction at the room temperature, and therefore a second barrel body is formed in the first barrel body; and S5, finally, waiting for natural cooling of the first barrel body, so that the second barrel body is tightly pressed by the first barrel body. By arranging the second barrel body formed by splicing the barrel body tiles, the manufacturing difficulty of a traditional integrated sintering barrel body is reduced, forming is convenient, and the manufacturing cost is reduced; and meanwhile, the corresponding barrel body tiles are replaced when the second barrel body is locally abraded, so that waste is avoided, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sand mills, in particular to a large-size wear-resistant inner layer cylinder for a sand mill and a manufacturing method thereof. Background Art

[0002] The sand mill is used to grind materials. Its structure includes a grinding cylinder. When the sand mill is working, the materials are stored in the grinding cylinder for grinding and dispersion. The grinding cylinder includes an inner cylinder and an outer cylinder, both of which are cylindrical. The inner cylinder is installed inside the outer cylinder, and the inner cavity of the inner cylinder is the working cavity of the sand mill.

[0003] In the prior art, the inner cylinder is mostly made of silicon carbide, which is integrally formed by sintering and lined with the inner cylinder wall of the sand mill when in use. When the barrel size of the inner cylinder is relatively small (inner diameter ≤ 600mm), the overall sintering solution is simple, reliable and low-cost; however, when the diameter of the barrel of the inner cylinder is required to continue to increase (reaching about 1000mm), due to limitations such as the size of the processing equipment, the difficulty of production increases exponentially, and the production cost also rises sharply; at the same time, the working principle of the sand mill determines that the inner wall of the inner cylinder will continue to wear. For the inner cylinder manufactured by integral sintering, when the local wear is serious, the entire inner cylinder needs to be replaced, resulting in production waste and increased maintenance costs. Summary of the invention

[0004] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a large-sized wear-resistant inner cylinder for a sand mill and a method for manufacturing the same. By providing a second cylinder formed by splicing cylinder tiles, the difficulty of manufacturing a traditional one-piece sintered cylinder is reduced, forming is facilitated, and the manufacturing cost is reduced. At the same time, by replacing the corresponding cylinder tiles when the second cylinder is partially worn, waste is avoided and maintenance costs are reduced.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A method for manufacturing a large-size wear-resistant inner cylinder for a sand mill comprises the following steps:

[0007] S1. A first barrel is manufactured by machining to obtain a first barrel having a cylindrical shape and a hollow interior;

[0008] S2. Using an integrated sintering process to make barrel tiles, prepare several barrel tiles;

[0009] S3. The first barrel is heated to 123°C as a whole. At this time, the assembly gap between the first barrel and the second barrel is set to 0.66 mm;

[0010] S4. Then, at room temperature, several pieces of barrel tiles are evenly applied to the inner wall of the first barrel along the circumference until the barrel tiles cover the entire inner wall of the first barrel, thereby forming a second barrel inside the first barrel;

[0011] S5. Finally, wait for the first barrel to cool naturally. Under room temperature conditions, an interference fit is formed between the first barrel and the second barrel, so that the first barrel presses the second barrel tightly.

[0012] As a further improvement of the above technical solution:

[0013] In S1., the processing of the first barrel comprises the following steps:

[0014] S1.1. Prepare a steel plate, cut the steel plate by water cutting, thereby cutting a square plate for making a first barrel;

[0015] S1.2. Rolling the square plate into a circle to obtain a curved plate;

[0016] S1.3. Weld the seams on the arc-shaped plate body and perform finish turning to obtain the first barrel body.

[0017] The inner diameter of the first barrel is 1120 mm (-2.0, -2.1) mm.

[0018] In S4., glue is applied between the bonding surfaces of the first barrel and the barrel tile.

[0019] Along the axial direction of the first barrel, two adjacent barrel tiles are arranged in a staggered manner.

[0020] A large-size wear-resistant inner cylinder for a sand mill made by the above-mentioned manufacturing method comprises a first cylinder body, the inner wall surface of the first cylinder body is evenly covered with cylinder body tiles, the cylinder body tiles are completely covered with the inner wall surface of the first cylinder body, thereby forming a second cylinder body inside the first cylinder body, and the second cylinder body is arranged concentrically with the first cylinder body;

[0021] The first barrel body and the second barrel body are connected by a heat-fitting process, so that the second barrel body is fixed on the inner wall surface of the first barrel body.

[0022] As a further improvement of the above technical solution:

[0023] The first cylinder is made of aluminum alloy.

[0024] The barrel tiles are made of silicon carbide.

[0025] The barrel tile is arc-shaped, and the shape of the outer side wall of the barrel tile corresponds to the shape of the inner side wall of the first barrel.

[0026] The beneficial effects of the present invention are as follows:

[0027] The present invention has a compact and reasonable structure and is easy to operate. By providing a second barrel body formed by splicing barrel body tiles, the difficulty of making a traditional one-piece sintered barrel body is reduced, molding is facilitated, and the production cost is reduced. At the same time, by replacing the corresponding barrel body tiles when the second barrel body is partially worn, waste is avoided and maintenance costs are reduced.

[0028] The manufacturing method of the present invention, by heating the first barrel to 123°C and adopting an assembly gap of 0.66mm, can ensure that the barrel tiles are conveniently and quickly attached to the inner wall surface of the first barrel to form the second barrel, thereby eliminating the need to use other auxiliary tooling to expand the diameter of the first barrel; at the same time, after the first barrel is completely cooled, at room temperature, the first barrel and the second barrel are tightly fitted, so that the first barrel presses the second barrel tightly.

[0029] The manufacturing method of the present invention, by adopting a first barrel and barrel tiles with different thermal expansion coefficients, can ensure that during the hot-loading process, the first barrel presses the second barrel tightly, so that the barrel tiles used to splice to form the second barrel are tightly attached to each other, so as to avoid the internal material of the sand mill being embedded in the gaps between the barrel tiles and wearing out the first barrel when the sand mill is working.

[0030] The manufacturing method of the present invention can improve the uniformity of the reaction force of the second barrel body on the first barrel body by staggering the two axially adjacent barrel body tiles, prevent deformation, eccentricity and other problems after the first barrel body and the second barrel body are assembled, and improve assembly efficiency and assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a flow chart of the present invention.

[0032] Figure 2 It is a schematic diagram of the structure of the present invention.

[0033] Figure 3 It is a schematic diagram of the structure of the barrel tile in the present invention.

[0034] Figure 4 for Figure 3 Top view of the .

[0035] Among them: 1. The first cylinder body; 2. The cylinder body tiles. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0037] Embodiment 1:

[0038] like Figure 1-Figure 4As shown, the method for manufacturing a large-size wear-resistant inner layer cylinder for a sand mill of this embodiment comprises the following steps:

[0039] S1. The first barrel 1 is manufactured by machining process to obtain a cylindrical first barrel 1 having a hollow interior;

[0040] The processing of the first barrel 1 comprises the following steps:

[0041] S1.1. Prepare the steel plate, cut the steel plate by water cutting, thereby cutting to obtain a square plate for making the first barrel 1;

[0042] S1.2. Roll the square plate into a circle to obtain a curved plate;

[0043] S1.3. Welding the seams on the arc-shaped plate and performing fine turning to obtain the first barrel 1;

[0044] The inner diameter of the first barrel 1 is 1120 mm (-2.0, -2.1) mm, that is, the inner diameter of the first barrel 1 adopts a negative tolerance, with an upper deviation of -2.0 mm and a lower deviation of -2.1 mm;

[0045] S2. The barrel tile 2 is made of an integrated sintering process, and several barrel tiles 2 are prepared; the barrel tile 2 is made of wear-resistant silicon carbide material, which can extend the service life of the second barrel and avoid frequent replacement to provide working efficiency of the sand mill barrel;

[0046] S3. The first barrel 1 is heated to 123°C as a whole. At this time, the assembly gap between the first barrel 1 and the second barrel is set to 0.66 mm;

[0047] Under this temperature and matching clearance, the barrel tile 2 can be conveniently and quickly attached to the inner wall of the first barrel 1 to form the second barrel, so that there is no need to use other auxiliary tooling to expand the diameter of the first barrel 1; at the same time, after the first barrel 1 is cooled, at room temperature, the first barrel 1 and the second barrel are tightly matched, so that the first barrel 1 presses the second barrel tightly;

[0048] S4. Then, at room temperature, several pieces of barrel tiles 2 are evenly applied to the inner wall of the first barrel 1 along the circumference until the barrel tiles 2 cover the entire inner wall of the first barrel 1, thereby forming a second barrel inside the first barrel 1;

[0049] When the barrel body tiles 2 are attached, glue is applied between the fitting surfaces of the first barrel body 1 and the barrel body tiles 2 to facilitate the fixing of the barrel body tiles 2;

[0050] like Figure 2As shown, along the axial direction of the first barrel body 1, two adjacent barrel body tiles 2 are arranged in a staggered manner, which can improve the uniformity of the reaction force of the second barrel body on the first barrel body 1, prevent the first barrel body 1 and the second barrel body from being deformed, eccentric, and other problems after assembly, and improve assembly efficiency and assembly quality;

[0051] S5. Finally, wait for the first barrel body 1 to cool naturally. Under room temperature conditions, an interference fit is formed between the first barrel body 1 and the second barrel body, so that the first barrel body 1 presses the second barrel body tightly.

[0052] Embodiment 2:

[0053] like Figure 2-Figure 4 As shown, this embodiment provides a large-sized wear-resistant inner layer cylinder for a sand mill, which is manufactured by the manufacturing method of a large-sized wear-resistant inner layer cylinder for a sand mill provided in the first embodiment;

[0054] The sand mill of this embodiment uses a large-size wear-resistant inner layer cylinder, including a first cylinder body 1, and the cylinder body tiles 2 are evenly covered on the inner wall surface of the first cylinder body 1, and the cylinder body tiles 2 are completely covered on the inner wall surface of the first cylinder body 1, thereby forming a second cylinder body inside the first cylinder body 1, and the second cylinder body is arranged concentrically with the first cylinder body 1; a hot-loading process is adopted between the first cylinder body 1 and the second cylinder body, so that the second cylinder body is fixed on the inner wall surface of the first cylinder body 1.

[0055] The first cylinder body 1 is made of aluminum alloy, and the cylinder body tiles 2 are made of silicon carbide. The aluminum alloy material is light and has a high expansion coefficient, while the silicon carbide material has good wear resistance and a low expansion coefficient, which can ensure that under the hot loading process, the first cylinder body 1 presses the second cylinder body tightly, so that the cylinder body tiles 2 used to splice to form the second cylinder body are closely attached to each other, so as to avoid the internal material of the sand mill being embedded in the gaps between the cylinder body tiles 2 and wearing out the first cylinder body 1 when the sand mill is working.

[0056] The barrel tile 2 is arc-shaped, and the shape of the outer wall of the barrel tile 2 corresponds to the shape of the inner wall of the first barrel 1, so that the second barrel and the first barrel 1 can be closely matched.

[0057] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A method for manufacturing a large-size wear-resistant inner cylinder for a sand mill, characterized in that: The following steps are involved: S1. A first barrel (1) is manufactured by machining process to obtain a first barrel (1) having a cylindrical shape and a hollow interior; S2. Using an integrated sintering process to produce barrel tiles (2), prepare several barrel tiles (2); S3. The first barrel (1) is heated as a whole to 123°C. At this time, the assembly gap between the first barrel (1) and the second barrel is set to 0.66 mm; S4. Then, at room temperature, several pieces of barrel tiles (2) are evenly attached to the inner wall of the first barrel (1) along the circumference until the barrel tiles (2) cover the entire inner wall of the first barrel (1), thereby forming a second barrel inside the first barrel (1); S5. Finally, wait for the first barrel body (1) to cool naturally. Under room temperature conditions, an interference fit is formed between the first barrel body (1) and the second barrel body, so that the first barrel body (1) presses the second barrel body tightly.

2. The method for manufacturing a large-size wear-resistant inner layer cylinder for a sand mill according to claim 1, characterized in that: In S1., the processing of the first barrel (1) comprises the following steps: S1.

1. Prepare a steel plate, cut the steel plate by water cutting, thereby cutting a square plate for making the first barrel (1); S1.

2. Rolling the square plate into a circle to obtain a curved plate; S1.

3. Weld the seams on the arc-shaped plate body and perform finish turning to obtain the first barrel body (1).

3. The method for manufacturing a large-size wear-resistant inner layer cylinder for a sand mill according to claim 1, characterized in that: The inner diameter of the first barrel (1) is 1120 mm (-2.0, -2.1) mm.

4. The method for manufacturing a large-size wear-resistant inner cylinder for a sand mill according to claim 1, characterized in that: In S4., glue is applied between the fitting surfaces of the first barrel (1) and the barrel tile (2).

5. The method for manufacturing a large-size wear-resistant inner layer cylinder for a sand mill according to claim 1, characterized in that: Along the axial direction of the first barrel (1), two adjacent barrel tiles (2) are arranged in a staggered manner.

6. A large-size wear-resistant inner cylinder for a sand mill made by the manufacturing method according to claim 1, characterized in that: It comprises a first barrel (1), the inner wall surface of the first barrel (1) being evenly covered with barrel tiles (2), the barrel tiles (2) completely covering the inner wall surface of the first barrel (1), thereby forming a second barrel inside the first barrel (1), the second barrel being arranged concentrically with the first barrel (1); The first barrel (1) and the second barrel are connected by a heat-fitting process, so that the second barrel is fixed on the inner wall surface of the first barrel (1).

7. The large-size wear-resistant inner cylinder for a sand mill as claimed in claim 6, characterized in that: The first cylinder (1) is made of aluminum alloy.

8. The large-size wear-resistant inner cylinder for a sand mill as claimed in claim 6, characterized in that: The barrel tiles (2) are made of silicon carbide.

9. The large-size wear-resistant inner cylinder for a sand mill as claimed in claim 6, characterized in that: The barrel tile (2) is arc-shaped, and the shape of the outer wall of the barrel tile (2) corresponds to the shape of the inner wall of the first barrel (1).

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