Filter section drum body manufacturing process
The laser drilling and rolling process addresses the issues of inconsistent hole sizes and structural instability in filter segment drums, ensuring uniformity and stability for improved performance.
Patent Information
- Application Number
- CN202510689897.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2025-07-15
AI Technical Summary
In the prior art, there are rounded corner residues and processing errors in the square holes of traditional drill bit drilling and milling machines, resulting in inconsistency between the inner and outer square holes of the drum body of the filter section, affecting the water overflow rate and strength, and high processing cost.
Using laser hole opening and rolling technology, first set the trapezoid square hole with a preset margin on the steel plate, and balance the stress by rolling pressure to ensure the consistency and strength of the inner and outer square holes. The forming of the drum body is completed by using a four-roll roll rolling machine and welding equipment.
The consistency between the inner and outer square holes is achieved, the polygon deformation is reduced, the strength and water overflow rate of the filter section drum body is improved, and the processing cost is reduced.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a manufacturing process of a drum, specifically a manufacturing process of a filter section drum body. Background Art
[0002] The sedimentation filtration centrifuge is an efficient and reliable device for dewatering and recovering coal slime with a particle size of less than 0.5 mm in coal preparation plants. The filter section drum body of the centrifuge is covered with through holes. In order to improve the hole opening rate, water passing rate and reduce blockage, the through holes are generally square holes. The traditional processing method of the drum body is as follows: First, the coiled steel plate is made into a cylindrical shape by casting or welding, and then the holes are drilled on the body with a drill bit or the square holes are processed with a milling machine. During the long-term manufacturing process, it is found that when drilling with a traditional drill bit, there are still rounded corners at the four corners of the square hole, which is a defect that cannot be overcome by the drilling process; when processing square holes with a milling machine, the processing cost is high. In addition, the method of opening holes after coiling the drum requires positioning the drum body on the machine tool repeatedly, which is prone to processing errors and a high defective rate.
[0003] In order to solve the above technical problems, a manufacturing process of "opening holes first and then coiling" has also emerged. However, during the long-term use process, it is found that this process has the following technical problems: 1. When opening square holes first, during coiling and rolling, due to different stiffnesses at each part of the cylinder wall, the part with small stiffness deforms greatly, and the part with large stiffness is extremely difficult to deform, resulting in a polygon instead of a cylinder; 2. After opening square holes first, when coiling into a cylinder, the circumferential direction of the square holes on the outer cylinder surface will increase, and the circumferential direction of the square holes on the inner wall will decrease, and square holes with consistent inner and outer diameters cannot be formed, affecting the water passing rate. Summary of the Invention
[0004] The present invention aims to provide a manufacturing process of a filter section drum body for the technical defects proposed in the background art.
[0005] The technical solution adopted by the present invention to achieve the above technical purpose is: A manufacturing process of a filter section drum body includes the following process steps: S1. Steel plate cutting; S2. Laser hole opening; S3. Rolling; S4. Coiling into a cylinder; S5. Welding and forming; S6. Installing a flange.
[0006] As a preferred technical solution: In step S1, the large steel plate blank is cut according to the size of the drum body.
[0007] As a preferred technical solution: In step S2, a Pentium 15000.w laser machine is used for hole opening; the side length of the square hole is set according to the actual situation, and the side length of each square hole can be 100 - 30.
[0008] As a preferred technical solution: in step S2, the cross-section of the square hole opened by the laser along the radial direction of the drum body is a trapezoidal structure with a wider upper part and a narrower lower part; the preset allowance for the side length of the square hole above the outer wall of the steel plate is the finally determined side length of the square hole - 2 ~ 5 mm; the preset allowance for the side length of the square hole above the inner wall of the steel plate is the finally determined side length of the square hole + 2 ~ 5 mm.
[0009] As a preferred technical solution: in step S3, an adjusting roller device is used to perform cold rolling on the steel plate completed in step S2, with a pressure range of 100 - 600 MPa, and it is repeatedly rolled 2 - 3 times.
[0010] As a preferred technical solution: in step S4, a four-roll plate bending machine is used to roll the steel plate completed in step S3, with a rolling time of 0.6 - 1 h and a static calibration time of 0.5 - 1 h.
[0011] As a preferred technical solution: in step S5, the JQ.MG70S-6 device is used to weld the butt joints of the steel plate rolled into a cylinder, with a welding current of 200 ~ 250 A and a voltage of 22 ~ 25 V.
[0012] Compared with the prior art, the beneficial effects of the technical solution disclosed by the present invention are as follows: 1. After the steel plate is cut, laser punching is used, and a preset allowance is set during the punching process to avoid deformation during the curling process; 2. After laser punching, the adjusting roller is used to repeatedly roll, balancing the stress around the square hole, and reducing the polygon effect to an allowable range; 3. A preset allowance is set for the laser punching, so that during the process of rolling into a cylinder, the square hole sizes of the inner and outer cylinder walls are the same, ensuring the overall strength stability of the drum body. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a process flow block diagram of the present invention.
[0014] Figure 2 It is the front view of the present invention.
[0015] Figure 3 It is an unfolded schematic diagram of the drum body of the present invention.
[0016] In the figure: flange 1, drum body 2, square hole 3. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The present invention will be further described below with reference to the drawings and embodiments.
[0018] See the appendix Figures 1-3, the process disclosed by the present invention is a further innovation to the opening and rolling forming process of the filter section drum body, specifically including the following process steps: S1. Steel plate cutting; S2. Laser hole opening; S3. Roll pressing; S4. Rolling into a cylinder; S5. Welding and forming; S6. Installing a flange.
[0019] As a preferred technical solution, in step S1 of the present invention, the large steel plate blank is cut according to the size of the drum body, and the cutting size and the thickness of the steel plate are selected according to the actual needs of the drum body 2. The side length of the square hole opened on the steel plate is set according to the actual situation. The side length of each square hole can be 100 - 30, and preferably 100*100, 60*60, 80*80, 30*30 according to the actual needs.
[0020] In the above preparation process of the present invention, a laser device is used to first open holes on the steel plate and then roll it into a cylinder.
[0021] In order to solve the problem that when opening holes first, the circumferential direction of the square holes on the outer cylinder surface will increase, the circumferential direction of the square holes on the inner wall will become smaller, and square holes with consistent inner and outer dimensions cannot be formed during the process of rolling into a cylinder, in step S2 of the present invention, a Pentium 15000.w laser machine is used to first open holes on the cut steel plate. To avoid deformation, the cross-section of the square hole opened by the laser along the radial direction of the drum body is a trapezoidal structure with a wider upper part and a narrower lower part; its cross-section is a trapezoidal structure with a wider upper part and a narrower lower part. Since during the process of rolling into a cylinder, the square holes on the outer wall of the steel plate are stretched and enlarged, and the square holes on the inner wall of the steel plate are compressed and reduced, therefore, the preset margin for the side length of the square holes on the outer wall of the steel plate is the final determined side length of the square hole - 2 ~ 5 mm; the preset margin for the side length of the square holes on the inner wall of the steel plate is the final determined side length of the square hole + 2 ~ 5 mm. In this way, presetting the margin during laser hole opening can ensure that the upper and lower side lengths of the deformed square holes are the same during the process of rolling into a cylinder. Generally, the value of the preset margin is adjusted according to the thickness of the steel plate. The larger the thickness, the larger the preset margin, and vice versa.
[0022] In order to solve the problem in the actual preparation process that if the square hole is opened first, during rolling and rolling, due to the different stiffnesses of each part of the cylinder wall, the part with small stiffness deforms greatly, and the part with large stiffness is extremely difficult to deform, resulting in a polygon rather than a cylinder. In step S3, an adjusting roller device is used to perform normal-temperature rolling on the steel plate completed in step S2, with a pressure range of 100-600 MPa and repeated rolling 2-3 times. In step S4, a four-roll plate rolling machine is used to roll the steel plate completed in step S3, with a rolling time of 0.6-1 h and a static alignment time of 0.5-1 h. Through multiple adjustments of rolling in this way, the polygon effect is reduced to an allowable range, ensuring the overall strength of the drum body 2.
[0023] In step S5, the JQ.MG70S-6 device is used to weld the butt edges of the steel plate rolled into a cylinder, with a welding current of 200 ~ 250 A and a voltage of 22 ~ 25 V. After welding is completed, the drum body 2 is manufactured.
[0024] In step S6, flanges 1 are welded to both ends of the drum body completed in step S5. Generally, for the convenience of installation, the outer diameter of one end flange is larger than that of the other end flange.
Claims
1. A manufacturing process for the filter section drum body, characterized in that, It includes the following technological steps: S1. Steel plate cutting; S2. Laser hole opening; S3. Roll pressing; S4. Rolling into a cylinder; S5. Welding and forming; S6. Installing flanges.
2. The manufacturing process of the filter section drum body according to claim 1, characterized in that In step S1, the large steel plate blank is cut according to the size of the drum body.
3. The manufacturing process of the filtering section drum body according to claim 1, characterized in that, In step S2, a Pentium 15000.w laser machine is used for hole opening; the side length of the square hole is set according to the actual situation, and the side length of each square hole can be 100 - 30.
4. The manufacturing process of the filter section drum body according to claim 3, characterized in that In step S2, the cross-section of the square hole opened by the laser along the radial direction of the drum body is a trapezoidal structure with a wider upper part and a narrower lower part; the preset margin of the side length of the square hole above the outer wall of the steel plate is the final determined side length of the square hole - 2 ~ 5 mm; the preset margin of the side length of the square hole above the inner wall of the steel plate is the final determined side length of the square hole + 2 ~ 5 mm.
5. The manufacturing process of the filter section drum body according to claim 1, characterized in that, In step S3, an adjusting roll device is used to perform normal-temperature roll pressing on the steel plate completed in step S2, with the pressure range of 100 - 600 MPa, and roll pressing is repeated 2 - 3 times.
6. The manufacturing process of the filter section drum body according to claim 1, characterized in that, In step S4, a four-roll plate rolling machine is used to roll the steel plate completed in step S3, with the rolling time of 0.6 - 1 h and the static calibration time of 0.5 - 1 h.
7. The manufacturing process of the filter section drum body according to claim 1, characterized in that, In step S5, a JQ.MG70S-6 device is used to weld the butted edges of the steel plate rolled into a cylinder, with a welding current of 200 ~ - 250 A and a voltage of 22 ~ - 25 V.