Multi-part synchronous repairing method for tuyere peephole device
Through the multi-part synchronous repair method, the problem of high wear rate of parts in the air vent peephole device was solved, efficient repair and cost reduction were achieved, and sealing requirements were met.
Patent Information
- Application Number
- CN202410363297.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-09-30
AI Technical Summary
The parts of the tuyere peephole device have a high wear rate, resulting in frequent replacement and high procurement costs. The existing repair methods are inefficient and cannot meet the sealing requirements.
A multi-part synchronous repair method is adopted, which includes forming a block layer on the surface to be repaired, and performing rough grinding and fine grinding through elastic support components and grinding arms to form finished parts with Ra0.8 or above.
The roughness of parts is improved to meet sealing requirements, the frequency of parts replacement and procurement costs are reduced, and repair efficiency is improved.
Smart Images
Figure CN120715560A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of metallurgical equipment repair, in particular to a multi-part synchronous repair method for a tuyere peephole device. Background Art
[0002] A tuyere peephole is a metallurgical device used to observe the working conditions within a blast furnace's tuyere. Due to the high pressure and toxicity of blast furnace gas, the spherical arc surface between the cover plate and the square flange, as well as the spherical arc surface between the spherical sleeve and the cover plate, must fit perfectly together to ensure airtightness when closed and withstand a pressure of 3 MPa. To meet these requirements, the roughness of the spherical arc surface must reach Ra0.8 or higher when used.
[0003] Due to the high frequency of use of the tuyere peephole device, the cover plate, spherical sleeve and square flange have a high wear rate and need to be replaced frequently. The scrapped parts are generally handled according to the scrap process, and the purchase price of new products is high and the process is long, which not only increases the time cost but also increases the economic cost.
[0004] In summary, there is an urgent need for a multi-part synchronous repair method for an air vent peephole device to solve the technical problems existing in the related art. Summary of the Invention
[0005] The main purpose of the present invention is to provide a multi-part synchronous repair method for an air vent peephole device, so as to solve the technical problem in the related art that scrapped parts are generally handled according to the scrap process, while the purchase price of new parts is high and the process is long, which not only increases the time cost but also increases the economic cost.
[0006] To achieve the above-mentioned object, the present invention provides a multi-part synchronous repair method for a tuyere peephole device, wherein the parts to be repaired include a spherical sleeve, a cover plate, and a square flange that are sequentially connected and rotated, wherein the surface to be repaired includes a contact surface between the spherical sleeve and the cover plate and / or a contact surface between the cover plate and the square flange. The multi-part synchronous repair method comprises:
[0007] The surface of the part to be repaired is processed to form a part with a block layer, and the block layer is sequentially rough-ground and fine-ground to obtain a finished part that meets the requirements of the tuyere peephole device;
[0008] The part includes a spherical sleeve, a cover plate and a method flange; the block layer is located on the surface of the part to be repaired; the grinding device used in the fine grinding step includes an elastic support component and a grinding arm, the elastic support component includes a base bed and a plurality of elastic members arranged on the base bed, the elastic member is movably connected to the method flange at one end away from the base bed, the spherical sleeve, the cover plate and the method flange are matched according to their matching relationship in the air outlet peeping device, the spherical sleeve and the cover plate, and the cover plate and the method flange are all rotationally connected, and the spherical sleeve is connected to the grinding arm, and the grinding arm provides power to drive the spherical sleeve and the cover plate, and the cover plate and the method flange to rotate;
[0009] The fine grinding step includes a first fine grinding and a second fine grinding performed in sequence: the first fine grinding includes a first grinding and a second grinding performed in sequence between the contact surface of the cover plate and the method flange, in the first grinding step, the pressure under the grinding arm is 40-55kg, the grinding arm speed is 100-120r / min, and the grinding time is 25-35min; in the second grinding step, the pressure under the grinding arm is 40-55kg, the grinding arm speed is 100-120r / min, and the grinding time is 42-50min; the second fine grinding includes detachably connecting the method flange and the cover plate obtained by the first fine grinding, and grinding between the contact surface of the spherical sleeve and the cover plate; the pressure under the grinding arm is 40-55kg, the grinding arm speed is 100-120r / min, and the grinding time is 50-58min.
[0010] Preferably, the grinding materials used for the first-level grinding in the first fine grinding are grinding paste and mineral oil, the grinding paste particle size is 300-400 mesh, and the volume ratio of the mineral oil to the grinding paste is 1:(15-20); the grinding materials used for the second-level grinding in the first fine grinding are grinding paste and mineral oil, the grinding paste particle size is 800-1000 mesh, and the volume ratio of the mineral oil to the grinding paste is 1:(15-20); the grinding materials used in the second fine grinding are grinding paste and mineral oil, the grinding paste particle size is 320-400 mesh, and the volume ratio of the mineral oil to the grinding paste is 1:(15-20).
[0011] Preferably, the coating thickness of the grinding material in the first fine grinding and the second fine grinding steps is 0.5-1 mm.
[0012] Preferably, the elastic member includes a guide column and a spring, one end of the guide column is connected to the base bed, and the other end passes through the screw hole of the method flange; the spring is sleeved on the stud, and one end of the spring is in contact with the method flange, and the other end is connected to the base bed.
[0013] Preferably, the elastic coefficient of the spring is 6-10 kg / mm, the length of the spring under normal conditions is 150-170 mm, the spring wire diameter is 8-10 mm, and the outer diameter of the spring is 45-50 mm.
[0014] Preferably, the elastic member further includes a fixing member, and the fixing member is arranged at one end of the guide column passing through the screw hole of the square flange.
[0015] Preferably, the outer diameter of the guide column is smaller than the diameter of the screw hole of the square flange, and the difference is 0.8-1.3 mm.
[0016] Preferably, the elastic members are provided in two or more groups, and at least two groups of elastic members are diagonally arranged.
[0017] Preferably, the surface processing step of the part to be repaired includes cleaning, flaw detection, machining and surfacing the surface of the part to be repaired in sequence; the machining step includes removing the wear layer and fatigue layer on the surface of the part; the thickness of the block layer is greater than the sum of the thickness of the wear layer and the fatigue layer.
[0018] Preferably, in the surfacing step, the welding voltage is 14-16 V, the welding current is 80-100 A, the welding speed is 8-12 cm / min, the oxygen flow rate is 8-15 L / min, and the preheating temperature before welding is 100-110° C.
[0019] The beneficial effects of the present invention are:
[0020] The present application provides a method for synchronously repairing multiple parts of an air vent peephole device, in which the surface to be repaired of the part to be repaired is processed to form a part with a block layer and then roughly ground, and then the spherical sleeve, cover plate and square flange are installed according to the matching relationship existing in the air vent peephole device, and a grinding device is further installed. The grinding arm provides power to drive the spherical sleeve and cover plate, and the cover plate and square flange to rotate, and fine grinding is completed to obtain a finished part with a surface roughness of Ra0.8 or above. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0022] Figure 1 1 is a schematic structural diagram of a grinding device according to an embodiment of the present application;
[0023] Figure 2 This is a schematic structural diagram of a grinding device according to an embodiment of the present application from another angle;
[0024] Figure 3 It is a structural diagram of the tuyere peeping device mentioned in this application;
[0025] Figure 4 It is a partial cross-sectional view of the tuyere peeping device mentioned in this application.
[0026] Among them, 1-spring, 2-guide column, 3-square flange, 4-base, 5-cover, 6-spherical sleeve, 7-grinding arm, 8-base
[0027] The realization of the objectives, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0029] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship and movement status of various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0030] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.
[0031] Moreover, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0032] The inventor discovered during the metallurgical production process that some parts of the tuyere peephole device (cover plate, spherical sleeve and method flange) are replaced frequently, and the purchase price of new products is not only high, but also the process is long, which has a great impact on the smelting production efficiency and cost. Therefore, it is necessary to repair the damaged parts to solve the above problems. The inventor initially adopted the solution of surfacing welding followed by turning for repair. However, due to the limitation of the lathe precision, the surface roughness of the repaired parts can only reach Ra1.6. If a high-precision lathe is purchased directly, it will not only take a long time to wait for delivery, but also cost a high price to purchase. Therefore, in order to improve the roughness level, the inventor adopted the method of manual grinding to repair the parts after preliminary processing, but this method has the problems of slow efficiency, uneven grinding, and failure to meet the sealing requirements. In order to solve the above problems, the inventor provides the following solutions:
[0033] To achieve the above-mentioned object, the present invention provides a multi-part synchronous repair method for a tuyere peephole device, wherein the parts to be repaired include a spherical sleeve, a cover plate, and a square flange that are sequentially connected and rotated, wherein the surface to be repaired includes a contact surface between the spherical sleeve and the cover plate and / or a contact surface between the cover plate and the square flange. The multi-part synchronous repair method comprises:
[0034] The surface of the part to be repaired is processed to form a part with a block layer, and the block layer is sequentially rough-ground and fine-ground to obtain a finished part that meets the requirements of the tuyere peephole device;
[0035] The part includes a spherical sleeve, a cover plate and a method flange; the block layer is located on the surface of the part to be repaired; the grinding device used in the fine grinding step includes an elastic support component and a grinding arm, the elastic support component includes a base bed and a plurality of elastic members arranged on the base bed, the elastic member is movably connected to the method flange at one end away from the base bed, the spherical sleeve, the cover plate and the method flange are matched according to their matching relationship in the air outlet peeping device, the spherical sleeve and the cover plate, and the cover plate and the method flange are all rotationally connected, and the spherical sleeve is connected to the grinding arm, and the grinding arm provides power to drive the spherical sleeve and the cover plate, and the cover plate and the method flange to rotate;
[0036] The fine grinding step includes a first fine grinding and a second fine grinding performed in sequence: the first fine grinding includes a first grinding and a second grinding performed in sequence between the contact surface of the cover plate and the method flange, in the first grinding step, the pressure under the grinding arm is 40-55kg, the grinding arm speed is 100-120r / min, and the grinding time is 25-35min; in the second grinding step, the pressure under the grinding arm is 40-55kg, the grinding arm speed is 100-120r / min, and the grinding time is 42-50min; the second fine grinding includes detachably connecting the method flange and the cover plate obtained by the first fine grinding, and grinding between the contact surface of the spherical sleeve and the cover plate; the pressure under the grinding arm is 40-55kg, the grinding arm speed is 100-120r / min, and the grinding time is 50-58min.
[0037] The present application provides a method for synchronously repairing multiple parts of an air vent peephole device, in which the surface to be repaired of the part to be repaired is processed to form a part with a block layer and then roughly ground, and then the spherical sleeve, cover plate and square flange are installed according to the matching relationship existing in the air vent peephole device, and a grinding device is further installed. The grinding arm provides power to drive the spherical sleeve and cover plate, and the cover plate and square flange to rotate, and fine grinding is completed to obtain a finished part with a surface roughness of Ra0.8 or above.
[0038] In some embodiments, the grinding materials used for the first-level grinding in the first fine grinding are grinding paste and mineral oil, the grinding paste particle size is 300-400 mesh, and the volume ratio of the mineral oil to the grinding paste is 1:(15-20); the grinding materials used for the second-level grinding in the first fine grinding are grinding paste and mineral oil, the grinding paste particle size is 800-1000 mesh, and the volume ratio of the mineral oil to the grinding paste is 1:(15-20); the grinding materials used in the second fine grinding are grinding paste and mineral oil, the grinding paste particle size is 320-400 mesh, and the volume ratio of the mineral oil to the grinding paste is 1:(15-20).
[0039] In some embodiments, the coating thickness of the grinding material in the first fine grinding and the second fine grinding steps is 0.5-1 mm.
[0040] The coating thickness is thinner, and the grinding material needs to be replenished more frequently during the grinding process; if the replenishment is not timely, the grinding process may become unstable, and the grinding material may jump or slip, resulting in lower grinding effect.
[0041] A thick coating requires a large amount of abrasive material, increases the gap between the abrasive material and the abrasive surface, and increases the amount of abrasive material accumulated on the abrasive surface, preventing the abrasive material from being fully dispersed and thus reducing the contact area. Furthermore, an excessively thick abrasive layer increases the sliding resistance of the abrasive material on the abrasive surface, making it difficult for the abrasive material to slide freely on the abrasive surface, thereby reducing the abrasive effect. In summary, the coating thickness in this application is 0.5-1 mm.
[0042] In some embodiments, the elastic member includes a guide column and a spring, one end of the guide column is connected to the base bed, and the other end passes through the screw hole of the method flange; the spring is sleeved on the stud, and one end of the spring is in contact with the method flange, and the other end is connected to the base bed.
[0043] In some embodiments, the elastic coefficient of the spring is 6-10 kg / mm, the length of the spring under normal conditions is 150-170 mm, the spring wire diameter is 8-10 mm, and the outer diameter of the spring is 45-50 mm.
[0044] In some embodiments, the elastic member further includes a fixing member, which is disposed at one end of the guide post passing through the screw hole of the square flange.
[0045] In the present invention, the fixing member can be a nut, and further, a butterfly screw or other parts can be selected for easy tightening. It should be noted that the outer diameter of the nut needs to be larger than the inner diameter of the screw hole on the square flange to prevent the square flange from detaching from the guide column when it moves along the length direction of the guide column.
[0046] In some embodiments, the outer diameter of the guide post is smaller than the diameter of the screw hole of the method flange, and the difference is 0.8-1.3 mm.
[0047] The present invention utilizes a grinding arm to provide a rotational power source, and a base bed as a fixed base. By adding two appropriate springs, a guide rod is fixed by a middle sleeve of the springs, and the flexibility and support of the springs are utilized to support the base plate. Since one end of the guide column is connected to the base bed and the other end passes through the screw hole of the method flange, and the outer diameter of the guide column is smaller than the diameter of the screw hole of the method flange (that is, the outer wall of the guide rod and the inner wall of the screw hole are spaced apart, and the spacing distance is 0.8-1.3mm), the grinding between the cover plate and the base plate, and between the spherical sleeve and the arc surface of the cover plate are flexible (that is, during grinding, the method flange has movable space both along the length direction of the guide column and along the radial direction of the guide column), and then fixed and connected by devices such as nuts to form a semi-automatic grinding system with flexibility. This system can avoid rigid grinding. During grinding, the spring has a buffering and balancing effect. The downward force of the drilling stroke forms a balance with the compressive force of the spring. Under the reaction of the spring force, the high point is subjected to the greatest force during grinding, and the high point is ground first, which is equivalent to an automatic positioning adjustment. The grinding efficiency is high and the precision after grinding is high. After grinding with this device, the roughness of the spherical arc surface of the repaired parts can reach above Ra0.8.
[0048] In some embodiments, the elastic members are provided in two or more groups, and at least two groups of elastic members are diagonally arranged.
[0049] By using at least two groups of diagonally arranged elastic parts, the method flange can be effectively prevented from rotating with the cover plate due to the influence of the friction force of the cover plate when the cover plate rotates, thereby improving the grinding effect between the cover plate and the method flange; when the cover plate and the method flange are ground and fixed, the grinding effect between the spherical sleeve and the cover plate can also be improved.
[0050] In some embodiments, the surface processing step of the part to be repaired includes cleaning, flaw detection, machining and surfacing the surface of the part to be repaired in sequence; the machining step includes removing the wear layer and fatigue layer on the surface of the part; the thickness of the block layer is greater than the sum of the thickness of the wear layer and the fatigue layer.
[0051] Furthermore, the flaw detection method can be color flaw detection or ultrasonic flaw detection; the purpose of the machining is to remove the damaged parts of the parts (such as roughening to remove surface rust of the parts to be repaired and then surfacing, leaving lathing and grinding allowances), providing a basis for subsequent surfacing.
[0052] In some embodiments, in the surfacing step, the welding voltage is 14-16V, the welding current is 80-100A, the welding speed is 8-12cm / min, the oxygen flow rate is 8-15L / min, and the preheating temperature before welding is 100-110°C; the welding wire used is stainless steel welding wire (the same material as the part to be repaired), and no heat treatment is required after welding.
[0053] Example 1:
[0054] A multi-part synchronous repair method for a tuyere peephole device, comprising:
[0055] The parts of the tuyere peephole device to be repaired are cleaned, inspected, machined, and built-up welded to obtain parts with block layers, and the block layers are sequentially rough-ground and fine-ground to obtain finished parts that meet the requirements of the tuyere peephole device; the parts to be repaired include a spherical sleeve 6, a cover plate 5, and a square flange 3 that are rotatably connected in sequence, wherein the surfaces to be repaired include the contact surface between the spherical sleeve and the cover plate and the contact surface between the cover plate and the square flange;
[0056] The block layer is located on the surface of the part to be repaired; see Figure 1 and Figure 2 The grinding device used in the fine grinding step includes an elastic support component and a grinding arm 7 (in this embodiment, the drilling arm of the drilling machine), the elastic support component includes a base bed 4 (in this embodiment, the platform of the drilling machine) and a plurality of elastic members arranged on the base bed 4, the end of the elastic member away from the base bed 4 is movably connected to the method flange 3, and the spherical sleeve 6, the cover plate 5 and the method flange 3 are matched according to their matching relationship in the tuyere peeping device (such as Figure 3 and Figure 4 As shown, the spherical sleeve 6 is connected with the spherical arc surface of the cover plate 5, and the cover plate 5 is connected with the spherical arc surface of the method flange 3. The method flange 3 is bolted on the base 8). The spherical sleeve 6 and the cover plate 5 and the cover plate 5 and the method flange 3 are all connected in a rotational manner, and the spherical sleeve 6 is connected to the grinding arm 7. The grinding arm 7 provides power to drive the spherical sleeve 6 and the cover plate 5, and the cover plate 5 and the method flange 3 to rotate; the elastic member includes a guide column 2, a spring 1 and a fixing member. One end of the guide column 2 is connected to the base bed 4, and the other end passes through the screw hole of the method flange 3; the spring 1 is sleeved on the stud, and one end of the spring 1 contacts the method flange 3 (the method flange naturally contacts the spring), and the other end is connected to the base bed 4. The elastic coefficient of the spring 1 is 8kg / mm, the length of the spring 1 under normal conditions is 160mm, the spring wire diameter is 8mm, and the spring outer diameter is 50mm. The fixing member (nut) is set at one end of the guide column 2 passing through the screw hole of the method flange 3. The outer diameter of the guide post 2 is smaller than the diameter of the screw hole of the square flange 3 by 1 mm (ie, the outer wall of the guide post and the inner wall of the screw hole are spaced apart by 0-1 mm). There are two groups of elastic members, and the two groups of elastic members are diagonally arranged.
[0057] The fine grinding step includes a first fine grinding and a second fine grinding performed in sequence: the first fine grinding includes a first grinding and a second grinding performed in sequence between the contact surface of the cover plate and the method flange 3, in the first grinding step, the pressure under the grinding arm 7 is 50kg, the grinding arm speed is 120r / min, the grinding time is 30min, the grinding materials used are grinding paste and mineral oil, the particle size is 300 mesh, and the added volume ratio of the mineral oil to the grinding paste is 1:20; in the second grinding step, the pressure under the grinding arm is 50kg, the grinding arm speed is 120r / min, the grinding time is 45min, and the grinding material used is grinding paste. and mineral oil, with a particle size of 800 mesh, and the volume ratio of the mineral oil to the grinding paste is 1:15; the second fine grinding includes a detachable connection (binding and fixing) of the method flange 3 and the cover plate obtained by the first fine grinding, and grinding is performed between the contact surface of the spherical sleeve 6 and the cover plate; the lower pressure of the grinding arm is 50kg, the grinding arm speed is 120r / min, the grinding time is 55min, and the grinding materials used are grinding paste and mineral oil, with a particle size of 800 mesh; the mineral oil includes engine oil (in other embodiments, thin oils such as edible oil can also be used); the volume ratio of the mineral oil to the grinding paste is 1:15.
[0058] In this embodiment, the base bed is provided with a groove, and the guide column 2 is directly snap-fitted into the groove of the base bed for easy disassembly.
[0059] In this embodiment, the coating thickness of the grinding material in the first fine grinding and the second fine grinding steps is 0.5-1 mm.
[0060] In this embodiment, the machining step includes removing the wear layer and the fatigue layer on the surface of the part; the thickness of the block layer is greater than the sum of the thicknesses of the wear layer and the fatigue layer, and the thickness of the block layer is 4 mm.
[0061] In this embodiment, in the surfacing step, the welding voltage is 14-16V, the welding current is 80-100A, the welding speed is 8-12cm / min, the oxygen flow rate is 8-15L / min, the preheating temperature before welding is 100°C, and the welding wire is stainless steel welding wire, and no heat treatment is required after welding.
[0062] Comparative Example 1: The difference from Example 1 is that the outer diameter of the guide column in the elastic part matches the inner diameter of the screw hole of the method flange, the guide column and the method flange are relatively fixed along the radial direction of the guide column, and can slide along the axial direction of the guide column.
[0063] Comparative Example 2: The difference from Example 1 is that the elastic support component only includes a base bed, and the method flange is fixedly connected to the base bed.
[0064] The performance of the finished parts repaired in Example 1 and Comparative Examples 1-2 was tested, and the results are shown in Table 1:
[0065] Table 1 Performance results of the finished parts repaired in Example 1 and Comparative Examples 1-2 (each example and comparative example is based on 100 parts to be repaired)
[0066]
[0067]
[0068] It can be seen from the data of Example 1 and Comparative Example 1 that when the spring does not play a flexible supporting role, even if the other process parameters in this application are used, it will lead to uneven grinding and a decrease in the final yield rate; and further, if the spring is not used to assist in grinding, the lack of elastic margin will lead to uneven grinding and the yield rate will be further reduced.
[0069] The above technical solutions of the present invention are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A method for synchronously repairing multiple parts of a tuyere peephole device, characterized in that: The parts to be repaired include a spherical sleeve (6), a cover plate (5), and a square flange (3) that are connected in rotation in sequence, wherein the surface to be repaired includes a contact surface between the spherical sleeve (6) and the cover plate (5) and / or a contact surface between the cover plate (5) and the square flange. The multi-part synchronous repair method includes: The surface of the part to be repaired is processed to form a part with a block layer, and the block layer is sequentially rough-ground and fine-ground to obtain a finished part that meets the requirements of the tuyere peephole device; The grinding device used in the fine grinding step includes an elastic support component and a grinding arm (7), wherein the elastic support component includes a base bed (4) and a plurality of elastic members arranged on the base bed (4), wherein one end of the elastic member away from the base bed (4) is movably connected to the method flange (3), and the spherical sleeve (6) is connected to the grinding arm (7), and the grinding arm (7) provides power to drive the spherical sleeve (6) and the cover plate (5), and the cover plate (5) and the method flange (3) to rotate; The fine grinding step includes a first fine grinding and a second fine grinding performed in sequence: the first fine grinding includes a first-level grinding and a second-level grinding performed in sequence between the contact surface of the cover plate (5) and the method flange (3), in which the pressure under the grinding arm is 40-55kg, the rotation speed of the grinding arm is 100-120r / min, and the grinding time is 25-35min; in the second-level grinding step, the pressure under the grinding arm is 40-55kg, the rotation speed of the grinding arm is 100-120r / min, and the grinding time is 42-50min; the second fine grinding includes detachably connecting the method flange and the cover plate obtained by the first fine grinding, and grinding between the contact surface of the spherical sleeve (6) and the cover plate; the pressure under the grinding arm is 40-55kg, the rotation speed of the grinding arm is 100-120r / min, and the grinding time is 50-58min.
2. The multi-part synchronous repair method according to claim 1, characterized in that: The grinding materials used for the first-level grinding in the first fine grinding are grinding paste and mineral oil, the grinding paste particle size is 300-400 mesh, and the volume ratio of the mineral oil to the grinding paste is 1:(15-20); the grinding materials used for the second-level grinding in the first fine grinding are grinding paste and mineral oil, the grinding paste particle size is 800-1000 mesh, and the volume ratio of the mineral oil to the grinding paste is 1:(15-20); the grinding materials used in the second fine grinding are grinding paste and mineral oil, the grinding paste particle size is 320-400 mesh, and the volume ratio of the mineral oil to the grinding paste is 1:(15-20).
3. The multi-part synchronous repair method according to claim 1, characterized in that: The coating thickness of the grinding material in the first fine grinding and the second fine grinding steps is 0.5-1 mm.
4. The multi-part synchronous repair method according to claim 1, characterized in that: The elastic member comprises a guide column (2) and a spring (1), one end of the guide column (2) is connected to the base bed (4), and the other end passes through the screw hole of the square flange; the spring (1) is sleeved on the stud, and one end of the spring (1) contacts the square flange, and the other end is connected to the base bed (4).
5. The multi-part synchronous repair method according to claim 4, characterized in that: The elastic coefficient of the spring (1) is 6-10 kg / mm, the length of the spring (1) under normal conditions is 150-170 mm, the spring wire diameter is 8-10 mm, and the spring outer diameter is 45-50 mm.
6. The multi-part synchronous repair method according to claim 4, characterized in that: The elastic member also includes a fixing member, which is arranged at one end of the guide column (2) passing through the screw hole of the square flange.
7. The multi-part synchronous repair method according to claim 4, characterized in that: The outer diameter of the guide column (2) is smaller than the diameter of the screw hole of the square flange, with the difference being 0.8-1.3 mm.
8. The multi-part synchronous repair method according to claim 1, characterized in that: The elastic members are provided in two or more groups, and at least two groups of elastic members are diagonally arranged.
9. The multi-part synchronous repair method according to claim 1, characterized in that: The surface processing steps of the part to be repaired include cleaning, flaw detection, machining and surfacing the surface of the part to be repaired in sequence; the machining steps include removing the wear layer and fatigue layer on the surface of the part; the thickness of the block layer is greater than the sum of the thickness of the wear layer and the fatigue layer.
10. The multi-part synchronous repair method according to claim 9, characterized in that: In the surfacing step, the welding voltage is 14-16V, the welding current is 80-100A, the welding speed is 8-12cm / min, the oxygen flow rate is 8-15L / min, and the preheating temperature before welding is 100-110°C.