Processing technology of wind tunnel water wall plate

Abstract

The invention belongs to the technical field of machining and manufacturing, and discloses a machining process of a wind tunnel water wall plate, which comprises the following steps: welding a main rib plate of a back rib and welding an auxiliary rib plate, and by utilizing the main rib plate of the welded back rib and the welding auxiliary rib plate, the large-area and large-volume water wall plate can be supported in the machining process, so that the water wall plate is prevented from being damaged. The process can meet the requirement on machining precision; various stresses and deformations generated in the machining process can be well treated, the quality can be well controlled, and various adverse factors influencing the machining precision and the machining quality can be coped with.

Description

Technical Field

[0001] The present invention relates to the technical field of processing and manufacturing, and specifically relates to a processing technology for a wind tunnel water wall panel. Background Art

[0002] In the existing processing of water wall panels, each product component is processed according to the design drawings and then assembled, welded, and has a relatively small volume and weight. For large-volume and heavy-weight water wall panels, component deformation and stress concentration will occur during the processing, which will have extremely adverse effects on the processing accuracy, quality, lifespan, and later use of the product. Moreover, large-volume and heavy-weight water wall panels have very high requirements for processing equipment and processing capabilities, greatly increasing the processing difficulty.

[0003] When the wind tunnel is working, it will generate high-temperature and high-pressure working conditions, which pose great difficulties and high requirements for the manufacturing technology of the water wall panel.

[0004] The processing accuracy and flatness requirements of the water wall panel are relatively high, and the component size is large, the weight is heavy, and it is not easy to process. Welding stress is generated during the welding process, resulting in workpiece deformation. There are many processing steps and a large processing volume, and some steps need to be repeated multiple times. Summary of the Invention

[0005] The purpose of the present invention is to provide a processing technology for a wind tunnel water wall panel, and the present invention solves the problems that the processing technology of large-volume and heavy-weight water wall panels is not easy to process and has low precision.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A processing technology for a wind tunnel water wall panel, including the following steps:

[0007] The first step: blanking;

[0008] Blank the panel, cover plate, and rib plates of the back ribs according to the drawings.

[0009] The second step: milling the weld chamfers of the rib plates and panel of the back ribs;

[0010] Mill the welding chamfers on the welding surfaces of the rib plates, panel, and cover plate of the back ribs.

[0011] The third step: welding the main rib plates of the back ribs;

[0012] Weld the main frame of the rib plates of the back ribs, and weld the rib plates of the back ribs at intervals of 1 to 2 rib plate spacings horizontally and vertically.

[0013] The fourth step: shaping;

[0014] Shape the main frame of the welded rib plates of the back ribs, and level and straighten the welding surface with the panel of the wall plate.

[0015] Step 5: Weld inspection;

[0016] Inspect the weld quality of the main frame of the rib plate of the back rib to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-through;

[0017] Step 6: Weld the panel;

[0018] Weld the main frame of the rib plate of the back rib and the panel. Use multi-point welding for pre-fixing, and then full-weld all the welds. Fill the welds with chamfers and build up fillet welds;

[0019] Step 7: Secondary shaping;

[0020] Perform overall shaping, leveling, and straightening on the welded structural parts;

[0021] Step 8: Weld the auxiliary rib plates;

[0022] Weld the remaining auxiliary rib plates inside the main frame of the rib plate of the back rib;

[0023] Step 9: Weld flaw detection inspection;

[0024] Perform flaw detection inspection on all the welds of the welded structural parts to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-through;

[0025] Step 10: Tempering;

[0026] Perform high-temperature tempering on the welded structural parts to eliminate weld stress;

[0027] Step 11: Tertiary shaping;

[0028] Perform shaping, straightening, and leveling on the welded structural parts after tempering;

[0029] Step 12: Machine the plane;

[0030] Mill the opposite surface of the welding surface between the panel and the back rib;

[0031] Step 13: Machine the cooling grooves on the panel;

[0032] Machine cooling grooves on one side of the milled panel;

[0033] Step 14: Inspection;

[0034] Inspect the geometric tolerances of the cooling grooves machined on the panel and check whether the machining dimensions (groove spacing, groove depth) meet the requirements of the drawings;

[0035] Step 15: Weld the cover plate;

[0036] Weld the cover plate to the panel. During welding, start from the middle of the panel and weld simultaneously to both sides at 4 welding points, and also weld from both ends of the panel towards the middle at the same time;

[0037] Sixteenth step: Inspection;

[0038] Inspect the weld seam between the cover plate and the panel to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-through; Inspect the airtightness of the weld seam;

[0039] Seventeenth step: Backfill the groove of the middle weld seam of the cover plate;

[0040] Backfill the groove of the weld seam between the cover plates. The height of the backfilled groove weld seam is 0.5 - 1 mm higher than the cover plate surface;

[0041] Eighteenth step: Inspect the weld seam;

[0042] Inspect the weld seam on the cover plate to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-through;

[0043] Nineteenth step: Four times of shaping;

[0044] Shape, straighten, and level the entire welded workpiece;

[0045] Twentieth step: Tempering;

[0046] Perform high-temperature tempering on the entire welded workpiece to release the internal stress of the entire welded part;

[0047] Twenty-first step: Five times of shaping;

[0048] Shape, straighten, and level the entire welded workpiece after tempering;

[0049] Twenty-second step: Machine the plane of the wall panel;

[0050] Use a large milling machine to mill the surface of the cover plate flat;

[0051] Twenty-third step: Inspection;

[0052] Inspect the entire weld seam of the wall panel to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-through; Inspect the weld seam sealing performance; Inspect the geometric tolerance of the machining according to the drawing requirements; Inspect the surface roughness of the cover plate according to the drawing requirements;

[0053] Twenty-fourth step: Assembly;

[0054] Assemble the external pipelines and installation hinge accessories of the wall panel;

[0055] Twenty-fifth step: Shaft concentricity machining;

[0056] Use a large boring machine to process the concentricity of the installation axis of the installed hinge;

[0057] The twenty-sixth step: Delivery of the finished product;

[0058] After the processed product passes the acceptance inspection according to the drawings, it is delivered.

[0059] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0060] 1. The processing method of this production method can meet the requirements for processing accuracy; it can well handle various stresses, deformations and quality control generated during the processing, and can cope with various adverse factors affecting the processing accuracy and quality. Description of the drawings

[0061] Figure 1 It is a schematic flow diagram of the present invention;

[0062] Figure 2 It is a schematic diagram of the product position of the present invention.

[0063] In the figure: 1. Cover plate; 2. Panel; 3. External pipeline; 4. Back rib; 5. Hinge. Detailed implementation manners

[0064] Please refer to Figures 1 to 2 , the present invention provides a technical solution: A processing technology for a wind tunnel water-cooled wall panel, including the following steps:

[0065] The first step: Cutting;

[0066] Cut the rib plates of the panel 2, the cover plate 1, and the back rib 4 according to the drawings;

[0067] The second step: Milling the weld chamfers of the rib plate of the back rib 4 and the panel 2;

[0068] Milling the welding chamfers of the welding surfaces of the rib plate of the back rib 4, the panel 2, and the cover plate 1;

[0069] The third step: Welding the main rib plate of the back rib 4;

[0070] Weld the main frame of the rib plate of the back rib 4, and weld the rib plates of the back rib 4 at intervals of 1 to 2 rib plate spacings horizontally and vertically;

[0071] The fourth step: Shaping;

[0072] Shape the main frame of the rib plate of the welded back rib 4, and level and straighten the welding surface with the panel 2 of the wall panel;

[0073] The fifth step: Weld seam detection;

[0074] Inspect the weld quality of the main frame of the rib plate of the back rib 4 to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-throughs;

[0075] Step 6: Weld the panel 2;

[0076] Weld the main frame of the rib plate of the back rib 4 and the panel 2. Use multi-point welding for pre-fixing, and then fully weld all the welds. Fill the welds with chamfers and build up fillet welds;

[0077] Step 7: Secondary shaping;

[0078] Perform overall shaping, leveling, and straightening on the welded structural parts;

[0079] Step 8: Weld the auxiliary rib plates;

[0080] Weld the remaining auxiliary rib plates inside the main frame of the rib plate of the back rib 4;

[0081] Step 9: Weld seam flaw detection;

[0082] Perform flaw detection on all the welds of the welded structural parts to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-throughs;

[0083] Step 10: Tempering;

[0084] Perform high-temperature tempering on the welded structural parts to eliminate the weld stress;

[0085] Step 11: Tertiary shaping;

[0086] Perform shaping, straightening, and leveling on the welded structural parts after tempering;

[0087] Step 12: Machine the plane;

[0088] Mill the opposite side of the welding surface of the panel 2 and the back rib 4;

[0089] Step 13: Machine the cooling grooves on the panel;

[0090] Machine cooling grooves on the milled side of the panel 2;

[0091] Step 14: Inspection;

[0092] Inspect the geometric tolerances of the cooling grooves machined on the panel 2 and check whether the machining dimensions (groove spacing, groove depth) meet the requirements of the drawings;

[0093] Step 15: Weld the cover plate 1;

[0094] Weld the cover plate 1 to the panel 2. During welding, start from the middle of the panel 2 and weld simultaneously to both sides at 4 welding points, and also weld from both ends of the panel 2 towards the middle at the same time;

[0095] Sixteenth step: Inspection;

[0096] Inspect the weld seam between the cover plate 1 and the panel 2 to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-through; Inspect the airtightness of the weld seam;

[0097] Seventeenth step: Backfill the groove of the middle weld seam of the cover plate 1;

[0098] Backfill the groove of the weld seam between the cover plates 1, and the height of the backfilled groove weld seam is 0.5 - 1 mm higher than the surface of the cover plate 1;

[0099] Eighteenth step: Inspect the weld seam;

[0100] Inspect the weld seam on the cover plate 1 to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-through;

[0101] Nineteenth step: Four times of shaping;

[0102] Shape, straighten, and level the entire welded workpiece;

[0103] Twentieth step: Tempering;

[0104] Perform high-temperature tempering on the entire welded workpiece to release the internal stress of the entire welded part;

[0105] Twenty-first step: Five times of shaping;

[0106] Shape, straighten, and level the entire welded workpiece after tempering;

[0107] Twenty-second step: Machine the plane of the wall panel;

[0108] Use a large milling machine to mill the surface of the cover plate 1;

[0109] Twenty-third step: Inspection;

[0110] Inspect the entire weld seam of the wall panel to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-through; Inspect the weld seam sealing performance; Inspect the geometric tolerance of the machining according to the drawing requirements; Inspect the surface roughness of the cover plate 1 according to the drawing requirements;

[0111] Twenty-fourth step: Assembly;

[0112] Assemble the external pipeline 3 of the wall panel and install accessories such as hinges 5;

[0113] Step 25: Machining of shaft concentricity;

[0114] Use a large boring machine to machine the concentricity of the mounting axis for mounting the hinge 5;

[0115] Step 26: Delivery of finished products;

[0116] After the processed products are inspected and qualified according to the drawings, they are delivered.

[0117] In this process, several rib plates are welded to the back of the panel 2, and the rib plates are used to support the whole wall panel.

[0118] I. The back rib 4 itself is a part of the product, and the purpose is to increase the stiffness of the panel 2;

[0119] II. The reason for welding the back rib 4 first is that for the large-area thin-walled panel 2, such as a 12m×4.3m×0.05m one, a large amount of welding operations will cause thermal stress deformation, and a large number of high-precision machining operations on the front of the panel 2 will also cause deformation of the thin-walled part. Therefore, the main rib plate frame welded first is shaped and then welded to the panel 2, which can enhance the stiffness of the panel 2. The large amount of welding operations during the encryption welding of rib plates and the final welding of the cover plate 1 will also reduce the generation of thermal deformation due to the presence of rib plates. During the welding manufacturing process, the support of rib plates can enable the processing of large-area and large-volume water-cooled wall panels, thereby improving the processing accuracy of water-cooled wall panels and reducing the processing difficulty of water-cooled wall panels.

[0120] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A processing technology for a wind tunnel water-cooled wall panel, characterized in that: It includes the following steps: The first step: blanking; Blank the rib plates of the panel (2), cover plate (1), and back rib (4) according to the drawings; The second step: milling the rib plates of the back rib (4) and the weld chamfers of the panel (2); Milling the welding chamfers of the rib plates of the back rib (4), panel (2), and cover plate (1); The third step: welding the main rib plates of the back rib (4); Weld the main frame of the rib plates of the back rib (4), and weld the rib plates of the back rib (4) horizontally and vertically at an interval of 1 - 2 rib plate spacings; The fourth step: shaping; Shape the main frame of the rib plates of the welded back rib (4), and level and straighten the welding surface with the panel (2) of the wall panel; The fifth step: weld seam inspection; Inspect the weld quality of the main frame of the rib plates of the back rib (4) to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-throughs; The sixth step: welding the panel (2); Weld the main frame of the rib plates of the back rib (4) and the panel (2), use multi-point welding for pre-fixing, and then full-weld all the welds, fill the welds with chamfers, and build up fillet welds; The seventh step: secondary shaping; Overall shape, level, and straighten the welded structural parts; The eighth step: welding the auxiliary rib plates; Weld the remaining auxiliary rib plates inside the main frame of the rib plates of the back rib (4); The ninth step: weld seam flaw detection; Conduct flaw detection on all the welds of the welded structural parts to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-throughs; The tenth step: tempering; Conduct high-temperature tempering on the welded structural parts to eliminate the weld stress; The eleventh step: three - time shaping; Shape, straighten, and level the welded structural parts after tempering; The twelfth step: machining the plane; Mill the opposite side of the welding surface between the panel (2) and the back rib (4); The thirteenth step: machining the cooling grooves on the panel; Machine cooling grooves on one of the milled sides of the panel (2); The fourteenth step: inspection; Inspect the geometric tolerances of the cooling grooves machined on the panel (2), and check whether the machining dimensions (groove spacing, groove depth) meet the requirements of the drawings; The fifteenth step: welding the cover plate (1); Weld the cover plate (1) to the panel (2). During welding, start from the middle of the panel (2) and weld simultaneously to both sides at 4 welding points, and also weld from both ends of the panel (2) to the middle at the same time; The sixteenth step: inspection; Inspect the weld between the cover plate (1) and the panel (2) to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-throughs; inspect the airtightness of the weld; The seventeenth step: backfilling the weld groove in the middle of the cover plate (1); Backfill the weld groove between the cover plates (1), and the weld of the backfilled groove is 0.5 - 1 mm higher than the surface of the cover plate (1); The eighteenth step: inspecting the weld seam; Inspect the weld on the cover plate (1) to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-throughs; The nineteenth step: four - time shaping; Shape, straighten, and level the entire welded and machined part; The twentieth step: tempering; Conduct high-temperature tempering on the entire welded and machined part to release the internal stress of the entire welded part; The twenty - first step: five - time shaping; Shape, straighten and level the entire welded part after tempering; Step 22: Machine the wall panel plane; Use a large milling machine to mill the surface of the cover plate (1); Step 23: Inspect; Inspect the entire wall panel weld to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, inclusions, pores, arc pits, and burn-through; inspect the weld sealing performance; inspect the geometric tolerances of the machining according to the drawing requirements; inspect the surface roughness of the cover plate (1) according to the drawing requirements; Step 24: Assemble; Assemble the external pipeline (3) and the installation hinge (5) accessories of the wall panel; Step 25: Machine the shaft concentricity; Use a large boring machine to machine the concentricity of the installation axis of the installation hinge (5); Step 26: Deliver the finished product; After the processed product is inspected and qualified according to the drawing, it is delivered.

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