Centrifugal machine disc body welding machining method based on full-automatic welding equipment

Abstract

The invention relates to the technical field of welding, in particular to a centrifugal machine disc body welding machining method based on full-automatic welding equipment. According to the centrifugal machine disc body welding machining method based on the full-automatic welding equipment, the centrifugal machine disc body is welded in a high-frequency induction brazing mode, heat is concentrated in the contact area of the reinforcing ribs and the disc body, the heat stress of the disc body is greatly reduced through uniform heat input, the problems of warping, deformation and the like of the disc body are effectively prevented, and the service life of the disc body is prolonged. And the forming precision and the structural stability of the disc body are improved. In the brazing filler metal melting process, the clamping force on the reinforcing ribs is increased through the clamping assemblies, the molten brazing filler metal is promoted to flow from the middle to the periphery under the capillary phenomenon effect, gaps between the reinforcing ribs and the disc body are fully filled, tight connection of the reinforcing ribs and the disc body is achieved, the probability that holes are generated in welding gaps is reduced, and the appearance quality of the disc body is improved; and the service life of the disc body is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of welding technology, in particular to a centrifuge disc body welding processing method based on a full-automatic welding equipment. BACKGROUND

[0002] As a core equipment for realizing high-efficiency separation of solid-liquid, liquid-liquid and other heterogeneous systems, the disc centrifuge relies on supergravity sedimentation and shallow pool theory. Compared with traditional separation machinery, it not only can obtain solid phase product with low moisture content and liquid phase product with high purity, but also has the advantages of continuous operation, automatic remote control, safe and reliable operation, small occupation area and labor saving, and has been widely used in key industries such as chemical industry, petroleum, food, medicine and other industries, and has become an important equipment to ensure production efficiency and product quality.

[0003] The core working part of the disc centrifuge is a plurality of coaxially sleeved discs, and a specific flow space is formed between adjacent discs, which is the key area to realize material separation. In order to improve the structural strength of the disc, deformation or damage of the disc under the action of centrifugal force at high speed rotation condition is avoided, and a reinforcing rib is welded outside the disc to enhance the load capacity and service life of the disc.

[0004] At present, the laser welding process is generally used for welding the reinforcing rib of the disc in the industry. However, the welding spot of laser welding is prone to unevenness, and the surface roughness is high, which not only affects the appearance quality of the disc, but also may cause material accumulation at the welding spot in subsequent use, thereby interfering with the separation effect. In addition, the heat distribution is uneven during laser welding, and local high temperature may cause thermal stress of the disc, thereby causing problems such as disc warping and deformation, which seriously reduces the forming precision and structural stability of the disc, and even may cause the disc to break during high-speed operation due to stress concentration, thereby restricting the overall performance and safety and reliability of the disc centrifuge. SUMMARY

[0005] The present application provides a centrifuge disc body welding processing method based on a full-automatic welding equipment to solve the problem that the existing disc is welded with a reinforcing rib by laser welding, the welding spot of laser welding is prone to unevenness, and the heat distribution is uneven during laser welding, which affects the forming quality of the disc.

[0006] The centrifuge disc body welding processing method based on the full-automatic welding equipment of the present application adopts the following technical scheme: a centrifuge disc body welding processing method based on a full-automatic welding equipment, comprising the following steps: S10, mounting the disc body on the workbench; S20, placing the reinforcing rib on the preset welding position on the peripheral wall surface of the disc body, and clamping the reinforcing rib by using the clamping assembly, and placing the filler metal between the disc body and the reinforcing rib; S30, align the induction coil of the high-frequency induction brazing machine with one of the preset welding positions, and start the high-frequency induction brazing machine to melt the filler metal, while increasing the clamping force between the reinforcing rib and the disc body through the clamping assembly; S40, rotate the disc body around its own axis to change the preset welding position aligned with the induction coil.

[0007] Further, in step S10, a support frame is arranged on the workbench, which is used to support the disc body.

[0008] Further, the support frame comprises a main frame body and a plurality of support rods, the main frame body is installed on the workbench, and the plurality of support rods are evenly distributed on the main frame body; the disc body is a conical shell, and both ends in the axial direction thereof are through, the disc body is placed on the plurality of support rods, and the support rods are attached to the inner peripheral wall surface of the disc body.

[0009] Further, the main frame body is installed on the workbench through a motor.

[0010] Further, in step S20, the reinforcing rib is of a curved surface structure, and the curvature of the reinforcing rib is greater than that of the disc body, and the reinforcing rib has a groove in the middle for placing the filler metal.

[0011] Further, the preset welding positions are a plurality of positions, and the plurality of preset welding positions are evenly distributed in the circumferential direction of the disc body.

[0012] Further, the clamping assembly comprises a plurality of clamping rods, the clamping rods are arranged one by one corresponding to the support rods, and the clamping rods are movably installed on the support rods corresponding thereto in the radial direction of the disc body.

[0013] Further, in step S30, the induction coil is arranged away from the side of the disc body in the initial state, and the induction coil can move towards the side close to the disc body to align the induction coil with the lower end of the disc body.

[0014] Further, the busbar at the lower end of the disc body is arranged in the horizontal direction.

[0015] Further, the induction coil is connected to the brazing system of the high-frequency induction brazing machine through an electrode plate, and the electrode plate can slide on the workbench.

[0016] The beneficial effects of this invention are as follows: The centrifuge disc welding method based on fully automated welding equipment uses high-frequency induction brazing to weld the centrifuge discs, concentrating heat in the contact area between the reinforcing ribs and the disc body. This avoids the localized high temperatures caused by uneven heat distribution in traditional laser welding. The uniform heat input significantly reduces the thermal stress of the disc body, effectively preventing warping and deformation, and improving the disc body's forming accuracy and structural stability. Furthermore, during the solder melting process, the clamping components increase the clamping force on the reinforcing ribs, causing the molten solder to flow from the center outwards under capillary action, fully filling the gap between the reinforcing ribs and the disc body, achieving a tight connection, reducing the probability of porosity in the weld seam, and resulting in smoother and flatter weld points on the reinforcing ribs after welding, significantly reducing surface roughness, improving the disc body's appearance quality, and extending its service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating an embodiment of the centrifuge disc welding method based on fully automated welding equipment of the present invention; Figure 2 A schematic diagram of a welding device used to implement the centrifuge disc welding method based on a fully automated welding device according to the present invention; Figure 3 for Figure 2 Front view of the middle section structure; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 for Figure 2 Side view of the middle section structure; Figure 6 for Figure 5 A cross-sectional view along the BB direction; Figure 7 for Figure 6 Enlarged view of point C in the middle; Figure 8 for Figure 2 A schematic diagram of the middle disc body and reinforcing ribs; Figure 9 for Figure 2 A schematic diagram of the central reinforcing rib.

[0019] In the figure: 100, disc body; 200, workbench; 210, support frame; 211, main frame body; 212, support rod; 220, motor; 300, reinforcing rib; 310, filler metal; 320, groove; 400, clamping assembly; 410, clamping rod; 411, mounting section; 412, clamping section; 500, mechanical hand; 600, induction coil; 610, electrode plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] The embodiment of the centrifuge disc body welding processing method based on the full-automatic welding equipment of the present application is shown in the figure. Figures 1 to 9

[0022] The centrifuge disc body welding processing method based on the full-automatic welding equipment comprises the following steps: S10, mounting the disc body 100 on the workbench 200.

[0023] S20, placing the reinforcing rib 300 on the preset welding position on the peripheral wall surface of the disc body 100, and clamping the reinforcing rib 300 by using the clamping assembly 400, and placing the filler metal 310 between the disc body 100 and the reinforcing rib 300. Specifically, the reinforcing rib 300 is placed on the peripheral wall surface of the disc body 100 by the mechanical hand 500. The mechanical hand 500 is mounted on the workbench 200. Among them, there are multiple preset welding positions, and the multiple preset welding positions are uniformly distributed in the circumferential direction of the disc body 100.

[0024] S30, aligning the induction coil 600 of the high-frequency induction brazing machine with one of the preset welding positions, and starting the high-frequency induction brazing machine to melt the filler metal 310, while increasing the clamping force between the reinforcing rib 300 and the disc body 100 by the clamping assembly 400.

[0025] Specifically, the high-frequency induction brazing machine is a prior art, which comprises a brazing system and an induction coil 600. The brazing system is mounted on the workbench 200, and is used to provide high-frequency alternating current to the induction coil 600, generate eddy current between the disc body 100 and the reinforcing rib 300, melt the filler metal 310 by using the resistance heating effect, and fill the gap between the reinforcing rib 300 and the disc body 100 by using the capillary principle, so as to realize the firm connection between the reinforcing rib 300 and the disc body 100.

[0026] ​S40, make the disc body 100 rotate around its own axis, change the preset welding position aligned with the induction coil 600. After welding, make the welded reinforcing rib 300 away from the induction coil 600, avoid the interference of external force on the just welded weld, guarantee the welding strength, and can rotate the other part of the disc body 100 which needs to be welded with the reinforcing rib 300 to align the induction coil 600 again, and weld again.

[0027] The embodiment adopts the high-frequency induction brazing method to weld the centrifuge disc body 100, so that the heat is concentrated in the contact area of the reinforcing rib 300 and the disc body 100, avoiding the local high temperature caused by uneven heat distribution in traditional laser welding, and the uniform heat input greatly reduces the thermal stress of the disc body 100, effectively prevents the disc body 100 from warping, deforming and other problems, and improves the forming precision and structural stability of the disc body 100. And in the process of melting the filler metal 310, the clamping assembly 400 increases the clamping force on the reinforcing rib 300, so that the molten filler metal 310 flows from the middle to the periphery under the action of capillary phenomenon, fully fills the gap between the reinforcing rib 300 and the disc body 100, realizes the close connection of the two, reduces the probability of hole in the welding gap, and the welding point on the reinforcing rib 300 after welding is more smooth and flat, the surface roughness is greatly reduced, the appearance quality of the disc body 100 is improved, and the service life of the disc body 100 is prolonged.

[0028] Further, in step S10, a support frame 210 is arranged on the workbench 200, and the support frame 210 is used to support the disc body 100.

[0029] The support frame 210 includes a main frame body 211 and a plurality of support rods 212, the main frame body 211 is installed on the workbench 200 by a motor 220, and the plurality of support rods 212 are distributed on the main frame body 211. The disc body 100 is a conical shell, and the two ends in the axial direction are through, the disc body 100 is placed on the plurality of support rods 212, and the support rods 212 are attached to the inner peripheral wall surface of the disc body 100.

[0030] The plurality of support rods 212 support and position the disc body 100, and the motor 220 can drive the disc body 100 to rotate around its own axis through the support frame 210.

[0031] Further, in step S30, the induction coil 600 is arranged away from one side of the disc body 100 in the initial state, and the induction coil 600 can move to the side close to the disc body 100, so that the induction coil 600 is aligned with the lower end of the disc body 100.

[0032] In the installation of the disc body 100, the induction coil 600 is arranged away from the side of the disc body 100 to avoid interference during the installation of the disc body 100. After the disc body 100 is installed on the support frame 210, the induction coil 600 is moved to the side close to the disc body 100 to align the preset welding position.

[0033] The induction coil 600 is connected to the brazing system through the electrode plate 610, and the electrode plate 610 can slide on the workbench 200 through PLC program control linkage.

[0034] Specifically, the induction coil 600 includes a first section, a tail section, and a coil section. One end of the first section is connected to the electrode plate 610, and the other end is connected to the coil section. The coil section is S-shaped, and the other end of the coil section is connected to the tail section. The other end of the tail section is connected to the electrode plate 610. The coil section includes three straight sections and two curved sections. The two curved sections are located between the three straight sections, so that the coil section as a whole is S-shaped. For the convenience of description, the three straight sections arranged in the vertical direction in the coil section are referred to as the first section, the second section, and the third section. The first section, the second section, and the third section are arranged in the vertical direction in sequence, and the first section is located above the second section. It should be noted that when installing the induction coil 600, the distance between the two coil sections corresponding to the position to be welded, i.e., the distance between the second section and the third section, should be smaller than the distance between the first section and the second section, so as to reduce the negative impact of the magnetic field and prevent uneven heat generation.

[0035] Further, the busbar at the lower end of the disc body 100 is arranged in the horizontal direction. By taking advantage of the characteristics of the molten filler material 310 being heavy and the gas being light, the gas generated between the reinforcing rib 300 and the disc body 100 during the welding process can be smoothly discharged from the bottom to the top, and the vibration generated during the clamping process of the clamping assembly 400 can further reduce the probability of holes being generated in the welding gap between the reinforcing rib 300 and the disc body 100.

[0036] Further, in step S20, the reinforcing rib 300 is a curved surface structure, and the curvature of the reinforcing rib 300 is greater than the curvature of the disc body 100. The reinforcing rib 300 has a groove 320 in the middle for placing the filler material 310.

[0037] The clamping assembly 400 includes a plurality of clamping rods 410, and the clamping rods 410 are arranged one-to-one corresponding to the support rods 212. The clamping rods 410 are connected to the brazing system, and the clamping rods 410 can be movably installed on the support rods 212 corresponding thereto in the radial direction of the disc body 100 through PLC program control linkage. The clamping rods 410 and the support rods 212 corresponding thereto define a welding space, and the position of the welding space is the preset welding position.

[0038] During the welding, the clamping rod 410 is controlled by the brazing system to slide along the radial direction of the disc body 100 to the side close to the support rod 212, so as to enhance the clamping force on the reinforcing rib 300, to continuously discharge the gas between the reinforcing rib 300 and the disc body 100, and to make the molten filler metal 310 fill the gap between the reinforcing rib 300 and the disc body 100, so as to enhance the welding strength of the two. In order to ensure the welding quality, the clamping rod 410 needs to continue clamping for 8-10 seconds after the welding is completed.

[0039] Specifically, the clamping rod 410 comprises a mounting section 411 and a clamping section 412, the mounting section 411 is slidingly mounted on the support rod 212, and the clamping section 412 is rotatably mounted on the mounting section 412 through a rotating shaft. The clamping section 412 is connected with the brazing system, and is controlled by the PLC program linkage to rotate relative to the mounting section 411. During the installation of the disc body 100, the clamping section 412 is rotated relative to the mounting section 411, so as to facilitate the installation of the disc body 100 on the support rod 212, and after the installation of the disc body 100 is completed, the clamping section 412 is reversed and reset.

[0040] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for welding a centrifuge disc body based on a fully automatic welding device, characterized in that: The method comprises the following steps: S10, mounting the disc body on the workbench; S20, placing the reinforcing rib on the preset welding position on the peripheral wall surface of the disc body, clamping the reinforcing rib by the clamping assembly, and placing the filler metal between the disc body and the reinforcing rib; S30, aligning the induction coil of the high-frequency induction brazing machine with one of the preset welding positions, starting the high-frequency induction brazing machine to melt the filler metal, and increasing the clamping force between the reinforcing rib and the disc body by the clamping assembly; S40, rotating the disc body around its own axis to change the preset welding position aligned with the induction coil.

2. The full-automatic welding apparatus-based centrifuge disc body welding process method according to claim 1, characterized in that: In step S10, the workbench is provided with a support frame for supporting the disc body.

3. The full-automatic welding apparatus-based centrifuge disc body welding process method according to claim 2, characterized in that: The support frame comprises a main frame body and a plurality of support rods, the main frame body is installed on the workbench, and the plurality of support rods are uniformly distributed on the main frame body; the disc body is a conical shell with both ends penetrating in the axial direction, and the disc body is placed on the plurality of support rods with the inner peripheral wall surface of the disc body abutting the support rods.

4. The full-automatic welding apparatus-based centrifuge disc body welding process method according to claim 3, characterized in that: The main frame body is installed on the workbench by a motor.

5. The full-automatic welding apparatus-based centrifuge disc body welding process method according to claim 3, characterized in that: In step S20, the reinforcing rib has a curved surface structure, and the curvature of the reinforcing rib is greater than that of the disc body; the reinforcing rib has a groove in the middle for placing the filler metal.

6. The full-automatic welding apparatus-based centrifuge disc body welding process method according to claim 5, characterized in that: There are a plurality of preset welding positions, and the plurality of preset welding positions are uniformly distributed in the circumferential direction of the disc body.

7. The full-automatic welding apparatus-based centrifuge disc body welding process method according to claim 6, characterized in that: The clamping assembly comprises a plurality of clamping rods, and the clamping rods are one-to-one correspondingly arranged with the support rods; the clamping rods are movably installed on the support rods corresponding thereto in the radial direction of the disc body.

8. The full-automatic welding apparatus-based centrifuge disc body welding process method according to claim 1, characterized in that: In step S30, the induction coil is initially arranged away from the side of the disc body, and the induction coil can move towards the side close to the disc body to align the lower end of the disc body.

9. The full-automatic welding apparatus-based centrifuge disc body welding process method according to claim 8, characterized in that: The generatrix at the lower end of the disc body is arranged in the horizontal direction.

10. The full-automatic welding apparatus-based centrifuge disc body welding process method according to claim 8, characterized in that: The induction coil is connected to the brazing system of the high-frequency induction brazing machine through an electrode plate, and the electrode plate can slide on the workbench.

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