Processing method for special-shaped nozzle forging and special-shaped nozzle forging

Abstract

The present invention relates to a processing method for a special-shaped nozzle forging and a special-shaped nozzle forging, including the following steps: leveling the end face of the main pipe, circularizing the blank, checking the allowances at each position, and turning the top plane reference flat; turning the end face and outer contour of the main pipe according to the dimensions; milling the end face of the opposite side pipe with a small amount of finishing allowance to reduce the subsequent boring depth; first pre-drilling the bottom hole for subsequent machining to use as a tool entry point, and then step-by-step enlarging and milling the waist-shaped deep hole; after the waist-shaped deep hole is processed, milling the end face of the opposite side pipe and machining the circularizing reference on the outer contour of the side pipe; milling the outer contour of the opposite side pipe body with the end face of the side pipe as the depth reference; boring the inner holes of each section of the main pipe with the end face of the main pipe as the depth reference; rotating the turntable by 180°, milling the bottom surface of the main pipe to be flush with the outer contour of the side pipe; milling a part of the outer contour of the main pipe with the end face of the main pipe as the axial reference plane and the center defined by the outer contour of the main pipe; rotating the turntable by 90° and 180° respectively, and setting the coordinate system with the pipe body and end face of the main pipe as the reference to mill the transition area between the main pipe and the side pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of special-shaped nozzle forgings, and particularly to a processing method and a special-shaped nozzle forging of a special-shaped nozzle forging. Background Art

[0002] With the rapid development of the national equipment manufacturing industry, the demand for the types of special-shaped forgings is continuously increasing, and it is gradually developing towards special-shaped and large-sized.

[0003] A currently manufactured special-shaped nozzle part, which belongs to a key core part, is in an "L" shape, with the main body dimensions of about 760×950×530 mm, and the inner cavity of the side pipe is partitioned by a partition plate to form a "waist-shaped" blind hole structure.

[0004] Normally, such structural parts should be made by casting, but due to the high performance, dimensional and geometric tolerance requirements of this part, the castings cannot meet the requirements, so a forging structure is adopted. However, there is no precedent for processing such large-sized forging structures. When this forging is finally processed, due to the relatively complex structure, it is necessary to change workstations multiple times. If conventional technical means are used, when changing workstations, the machining datum cannot be transferred in time, and the geometric tolerance cannot be guaranteed, and even the dimensional accuracy will be affected.

[0005] Therefore, how to ensure the continuity of the machining datum and the required dimensional and geometric tolerances under the continuous change of the datum during the workstation conversion is an urgent problem to be solved.

[0006] The foregoing description is provided to give general background information and does not necessarily constitute prior art. Summary of the Invention

[0007] The purpose of the present invention is to provide a processing method and a special-shaped nozzle forging of a special-shaped nozzle forging. The processing method of the special-shaped nozzle forging ensures the continuity and accuracy of the datum during the workstation conversion, and ensures the dimensional and geometric tolerances of the product.

[0008] The present invention provides a processing method for a special-shaped nozzle forging, including the following steps:

[0009] S1: After the previous blank is transferred to the finish machining process, first select a vertical lathe, place the main pipe downward on the table, level it according to the end face of the main pipe, circle the blank, check the remaining amount at each position, and then turn the top plane datum flat with the minimum machining amount;

[0010] S2: After the plane datum is processed, turn the workpiece over, place the datum plane processed in step S1 downward and level it, continue to roughly circle the main pipe blank, evenly divide the remaining amount of the side pipe to determine the center of the side pipe as the axial datum for processing, and turn the end face and outer contour of the main pipe according to the dimensions;

[0011] S3: After partial machining of the vertical lathe, a floor boring machine is selected. When placing the workpiece, the side pipe faces the machine spindle directly. Level it with the reference plane machined in step S1 facing downwards, align the center of the main pipe after machining in step S2, and measure the position dimension from the center of the main pipe to the end face of the side pipe. Leave a small amount of finishing allowance and mill the opposite side pipe end face to reduce the subsequent boring depth;

[0012] S4: Keep the working position unchanged. Use the end face of the main pipe machined in step S2 as the axial reference to measure the center position of the side pipe. When machining the upper and lower waist-shaped holes, first pre-drill the bottom holes for subsequent cutting, and then step by step expand and mill the waist-shaped deep holes. After machining the waist-shaped deep holes, mill the opposite side pipe end face and machine the roundness calibration reference on the outer contour of the side pipe;

[0013] S5: Turn the workpiece over. When placing it, make the main pipe face downwards and the side pipe face the spindle directly. Level it with the end face of the main pipe, center the outer contour of the main pipe, and circle the roundness of the outer circle reference of the side pipe. Use the end face of the side pipe as the depth reference to mill the outer contour of the side pipe body;

[0014] S6: Select a floor boring machine equipped with a CNC rotary table. Turn the workpiece over. When placing it, make the side pipe face downwards and the main pipe face the spindle directly. Level the end face of the side pipe and straighten the outer contour of the main pipe body. Use the end face of the main pipe as the depth reference to bore the inner holes of each section of the main pipe;

[0015] S7: Rotate the rotary table by 180°. Mill the bottom face of the main pipe to make it flush with the outer contour of the side pipe. Use the end face of the main pipe as the axial reference plane and circle the center with the outer contour of the main pipe to mill part of the outer contour of the main pipe;

[0016] S8: Rotate the rotary table by 90° and 180° respectively. Set the coordinate system with the body and end face of the main pipe as the reference to mill the transition area between the main pipe and the side pipe, and the machining is completed.

[0017] The present invention also provides a special-shaped nozzle forging, which is formed by applying the processing method of the above-mentioned special-shaped nozzle forging.

[0018] Further, the special-shaped nozzle forging includes a main pipe and a side pipe, which are vertically connected. The main pipe is internally provided with a first pipe, a second pipe, and a third pipe; one end of the first pipe passes through the end face of the main pipe, the other end of the first pipe is connected to the second pipe, and the other end of the second pipe is connected to the third pipe; the inner diameter of the first pipe is larger than that of the second pipe, and the inner diameter of the second pipe is larger than that of the third pipe; the first pipe, the second pipe, and the third pipe are coaxially arranged; the side pipe is internally provided with an upper waist-shaped hole and a lower waist-shaped hole, and one end of each of the upper waist-shaped hole and the lower waist-shaped hole passes through the end face of the side pipe, and the other end of the upper waist-shaped hole communicates with the third pipe.

[0019] Further, a first protrusion is provided in a circumferential manner on the side surface of the main pipe end portion, and a chamfer is provided at one end of the protrusion close to the side pipe.

[0020] Further, a second protrusion is provided in a circumferential manner on the side surface of the side pipe end portion.

[0021] Further, a concave arc transition region is provided at the inner right angle where the main pipe and the side pipe are connected.

[0022] Further, a convex arc surface is provided at the outer right angle where the main pipe and the side pipe are connected.

[0023] Further, the upper kidney-shaped hole and the lower kidney-shaped hole are symmetric about the diameter of the cross-sectional circle of the side pipe.

[0024] The processing method of the special-shaped pipe joint forging of the present invention ensures that during the finish machining of the target part, by reasonably setting the machining sequence of each part and reasonably selecting and transferring the machining reference during the conversion of the working station, the coherence and accuracy of the reference are maintained during the conversion of the working station, the dimensional and geometric accuracy of the product is ensured, and the final machining of the product is completed; at the same time, it can ensure that the reference is transferred synchronously during the conversion of the working station, and the machining process method is set optimally, and the final machining of the product is completed most efficiently and quickly. Description of the Drawings

[0025] Figure 1 It is a schematic flow chart of the processing method of the special-shaped pipe joint forging provided by the embodiment of the present invention.

[0026] Figure 2 It is a schematic structural diagram of the special-shaped pipe joint forging provided by the embodiment of the present invention.

[0027] Figure 3 It is Figure 2 The cross-sectional structural diagram of the special-shaped pipe joint forging in

[0028] Figure 4 It is Figure 2 The planar structural diagram of the special-shaped pipe joint forging in

[0029] Figure 5 It is Figure 2 The structural diagram of the top plane reference for vertical lathe machining of the special-shaped pipe joint forging in

[0030] Figure 6 It is Figure 2 The structural diagram of the outer contour of the main pipe for vertical lathe machining of the special-shaped pipe joint forging in

[0031] Figure 7 It is Figure 2 The structural diagram of the side pipe end face for boring machining of the special-shaped pipe joint forging in

[0032] Figure 8 is Figure 2 a schematic structural diagram of the waist-shaped deep hole and the roundness calibration reference processed by a boring machine for the special-shaped nozzle forging in

[0033] Figure 9 is Figure 2 another schematic structural diagram of the waist-shaped deep hole and the roundness calibration reference processed by a boring machine for the special-shaped nozzle forging in

[0034] Figure 10 is Figure 2 a schematic structural diagram of the outer contour of the side pipe processed by a boring machine for the special-shaped nozzle forging in

[0035] Figure 11 is Figure 2 a schematic structural diagram of the inner holes of each section of the main pipe processed by a boring machine for the special-shaped nozzle forging in

[0036] Figure 12 is Figure 2 a schematic structural diagram of the bottom surface and part of the outer contour of the main pipe processed by a boring machine for the special-shaped nozzle forging in

[0037] Figure 13 is Figure 2 a schematic structural diagram of the transition area between the two pipes processed by a boring machine for the special-shaped nozzle forging in

[0038] The reference numerals and components involved in the accompanying drawings are shown below:

[0039] 1. Main pipe

[0040] 11. First pipeline

[0041] 12. Second pipeline

[0042] 13. Third pipeline

[0043] 14. First protrusion

[0044] 15. Chamfer

[0045] 2. Side pipe

[0046] 21. Upper waist-shaped hole

[0047] 22. Lower waist-shaped hole

[0048] 23. Second protrusion

[0049] 3. Arc transition area

[0050] 4. Arc surface Specific embodiments

[0051] The following combines the accompanying drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0052] The terms "first", "second", "third", "fourth", etc. in the description and claims of the present invention are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0053] Example 1

[0054] Figure 1 It is a schematic flow chart of the processing method of the special-shaped nozzle forging provided by the embodiment of the present invention. Figure 5 For Figure 2 It is a schematic structural diagram of the vertical lathe machining the top plane reference of the special-shaped nozzle forging in Figure 6 For Figure 2 It is a schematic structural diagram of the vertical lathe machining the outer contour of the main pipe of the special-shaped nozzle forging in Figure 7 For Figure 2 It is a schematic structural diagram of the boring machine machining the side pipe end face of the special-shaped nozzle forging in Figure 8 For Figure 2 It is a schematic structural diagram of the boring machine machining the waist-shaped deep hole and the roundness calibration reference of the special-shaped nozzle forging in Figure 9 For Figure 2 It is another schematic structural diagram of the boring machine machining the waist-shaped deep hole and the roundness calibration reference of the special-shaped nozzle forging in Figure 10 For Figure 2 It is a schematic structural diagram of the boring machine machining the outer contour of the side pipe of the special-shaped nozzle forging in Figure 11 For Figure 2 It is a schematic structural diagram of the boring machine machining the inner holes of each section of the main pipe of the special-shaped nozzle forging in Figure 12 For Figure 2 It is a schematic structural diagram of the boring machine machining the bottom surface and part of the outer contour of the main pipe of the special-shaped nozzle forging in Figure 13 For Figure 2 It is a schematic structural diagram of the boring machine machining the transition area between the two pipes of the special-shaped nozzle forging. Please refer to Figure 1 , Figures 5 - 13 , the processing method of the special-shaped nozzle forging provided by the embodiment of the present invention includes the following steps:

[0055] As Figure 5 shown, S1: After the previous blank is transferred to the finish machining process, first select a vertical lathe, place the main pipe downward on the workbench, level it according to the main pipe end face, circle the blank, check the allowance at each position, and then turn the top plane reference flat with the minimum machining amount;

[0056] As Figure 6 shown, S2: After the plane reference machining is completed, turn the workpiece over, place the reference surface machined in step S1 downward and level it, continue to preliminarily circle the main pipe blank, evenly divide the side pipe allowance to determine the center of the side pipe as the axial reference for machining, and turn the main pipe end face and outer contour according to the dimensions;

[0057] As Figure 7As shown, S3: After the vertical lathe part is processed, a floor-type boring machine is selected. When the workpiece is placed, the side tube is facing the main axis of the machine tool. The reference surface processed in step S1 is leveled downward. The main tube processed in step S2 is corrected and centered. The side tube end face position size is returned to the main tube center. A small amount of light cutter is left to mill the side tube end face to reduce the subsequent boring depth. It should be noted that by processing the side tube end face, the end face allowance is reduced, the depth of the "waist-shaped" deep hole is relatively reduced, and the processing difficulty is reduced; but a small amount of allowance needs to be retained to remove the burrs generated by deep hole processing in subsequent processing.

[0058] like Figure 8 , Figure 9 As shown, S4: the workstation remains unchanged, and the end face of the main pipe machined in step S2 is used as the axial reference to return to the center position of the side pipe; when processing the upper and lower waist-shaped holes, first pre-drill the bottom hole for subsequent processing, and then expand and mill the waist-shaped deep hole in steps; after the waist-shaped deep hole is processed, mill the end face of the side pipe, and process the roundness reference on the outer contour of the side pipe. It should be noted that due to the large amount of waist-shaped deep hole processing, the side pipe needs to be placed at the bottom when the workpiece is placed to lower the center of gravity of the workpiece and increase the overall rigidity.

[0059] In addition, when processing waist-shaped deep holes, due to the large size of the deep holes, extended tools are required; however, extended tools have poor rigidity and low cutting efficiency. When removing the excess, tools of different lengths can be selected and used in steps to quickly remove the excess. Finally, the processing tool is used to complete the overall processing when finishing.

[0060] At the same time, during the processing of waist-shaped deep holes, the tool will vibrate at the corner position, causing damage to the tool. In order to ensure the processing quality and improve the life of the tool, the corner position can be drilled and milled in advance, and within the allowable size range, overcut at the corner to avoid vibration of the tool at the corner.

[0061] like Figure 10 As shown, S5: turn the workpiece over and place it with the main pipe facing downward and the side pipe facing the spindle. Level the end face of the main pipe, center the outer contour of the main pipe, and circle the outer circle of the side pipe. Use the end face of the side pipe as the depth reference to mill the outer contour of the side pipe body.

[0062] like Figure 11 As shown, S6: Use a floor-standing boring machine with a CNC rotary table, flip the workpiece, and place it with the side tube facing downward and the main tube facing the spindle. Level the end face of the side tube, straighten the outer contour of the main tube body, use the end face of the main tube as the depth reference, and bore the inner holes of each section of the main tube;

[0063] like Figure 12 As shown, S7: the turntable rotates 180°, and the bottom surface of the main pipe is milled to be flush with the outer contour of the side pipe; the outer contour of the main pipe is circled with the end surface of the main pipe as the axial reference plane and the outer contour of the main pipe as the center, and the outer contour of the main pipe is milled;

[0064] likeFigure 13 As shown, S8: the turntable rotates 90° and 180° respectively, and the main pipe body and end face are used as references to set the coordinate system, and the main pipe and side pipe transition area are milled to complete the processing.

[0065] It should be noted that the processing method of the special-shaped pipe forging of the present invention ensures that the target parts are processed in the fine processing by reasonably setting the processing order of each part, and reasonably selecting and transferring the processing datum when changing the workstation, so as to ensure that the continuity and accuracy of the datum are maintained during the workstation conversion, the size and shape and position accuracy of the product are guaranteed, and the final processing of the product is completed; at the same time, it can ensure that the datum is transferred synchronously when the workstation is converted, and the processing method is optimally set to complete the final processing of the product in the most efficient and quick way.

[0066] Figure 2 A schematic diagram of the structure of a special-shaped pipe forging provided in an embodiment of the present invention, Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the special-shaped pipe forging. Figure 4 for Figure 2 Schematic diagram of the plane structure of the special-shaped pipe forging. Please refer to Figure 2 , Figure 3 , Figure 4 The present invention also provides a special-shaped pipe forging, which is formed by the processing method of the special-shaped pipe forging.

[0067] The special-shaped pipe forging of the present invention comprises a main pipe 1 and a side pipe 2, wherein the main pipe 1 and the side pipe 2 are vertically connected, and a first pipe 11, a second pipe 12 and a third pipe 13 are arranged inside the main pipe 1; one end of the first pipe 11 passes through the end face of the main pipe 1, and the other end of the first pipe 11 is connected to the second pipe 12, and the other end of the second pipe 12 is connected to the third pipe 13; the inner diameter of the first pipe 11 is greater than the inner diameter of the second pipe 12, and the inner diameter of the second pipe 12 is greater than the inner diameter of the third pipe 13; the first pipe 11, the second pipe 12 and the third pipe 13 are coaxially arranged; an upper waist-shaped hole 21 and a lower waist-shaped hole 22 are arranged inside the side pipe 2, one end of the upper waist-shaped hole 21 and the lower waist-shaped hole 22 both pass through the end face of the side pipe 2, and the other end of the upper waist-shaped hole 21 is connected to the third pipe 13.

[0068] Furthermore, a first convex ring 14 is provided on the side surface of the end of the main pipe 1, and a chamfer 15 is provided on the convex ring at one end close to the side pipe 2; a second convex ring 23 is provided on the side surface of the end of the side pipe 2; a concave arc transition area 3 is provided at the inner right angle where the main pipe 1 and the side pipe 2 are connected; a convex arc surface 4 is provided at the outer right angle where the main pipe 1 and the side pipe 2 are connected; the upper waist-shaped hole 21 and the lower waist-shaped hole 22 are symmetrical about the diameter of the cross-sectional circle of the side pipe 2.

[0069] Based on the above description, the advantages of the present invention are as follows:

[0070] The processing method of the special-shaped nozzle forging of the present invention ensures that when the target part is finish-machined, by reasonably setting the processing sequence of each part and reasonably selecting and transferring the processing reference when changing the working position, the coherence and accuracy of the reference are maintained during the working position conversion, the dimensional and geometric accuracy of the product is ensured, and the final processing of the product is completed; at the same time, it can ensure that the reference is transferred synchronously when the working position is changed, and the processing process method is optimized to complete the final processing of the product most efficiently and quickly.

[0071] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A special-shaped nozzle forging, characterized in that, The special-shaped nozzle forging includes a main pipe (1) and a side pipe (2), which are vertically connected between the main pipe (1) and the side pipe (2). The inside of the main pipe (1) is provided with a first pipe (11), a second pipe (12) and a third pipe (13); One end of the first pipe (11) passes through the end face of the main pipe (1), the other end of the first pipe (11) is connected to the second pipe (12), and the other end of the second pipe (12) is connected to the third pipe (13); the inner diameter of the first pipe (11) is larger than the inner diameter of the second pipe (12), and the inner diameter of the second pipe (12) is larger than the inner diameter of the third pipe (13); the first pipe (11), the second pipe (12) and the third pipe (13) are coaxially arranged; The inside of the side pipe (2) is provided with an upper waist-shaped hole (21) and a lower waist-shaped hole (22). One end of the upper waist-shaped hole (21) and the lower waist-shaped hole (22) both pass through the end face of the side pipe (2), and the other end of the upper waist-shaped hole (21) is communicated with the third pipe (13); And it is formed by applying the following processing method. The processing method includes the following steps: S1: After the previous rough blank is transferred to the finish machining process, first select a vertical lathe, place the main pipe downward on the table, level it according to the end face of the main pipe, circle the rough blank, review the allowance at each position, and then turn the top plane reference flat with the minimum machining amount; After the plane reference machining is completed, turn the workpiece over, place the reference plane machined in step S1 downward and level it, continue to roughly round the main pipe blank according to the main pipe blank, evenly divide the allowance of the side pipe to determine the center of the side pipe as the axial reference for machining, and turn the end face and outer contour of the main pipe according to the dimensions; After the vertical lathe part machining is completed, select a floor boring machine. When placing the workpiece, the side pipe is facing the spindle of the machine tool. Level it downward according to the reference plane machined in step S1, correct and center the main pipe after machining in step S2, return from the center of the main pipe to the position dimension of the side pipe end face, and mill the side pipe end face with a small amount of finishing allowance to reduce the subsequent boring depth; Keep the working position unchanged, use the end face of the main pipe turned well in step S2 as the axial reference, and return to the center position of the side pipe; when machining the upper and lower waist-shaped holes, first pre-drill the bottom holes for subsequent machining and cutting, and then step by step expand and mill the waist-shaped deep holes; after the waist-shaped deep hole machining is completed, mill the side pipe end face and machine the roundness reference on the outer contour of the side pipe; Turn the workpiece over. When placing it, place the main pipe downward and the side pipe facing the spindle, level it according to the end face of the main pipe, center the outer contour of the main pipe, circle the outer circle reference of the side pipe, and mill the outer contour of the side pipe body with the end face of the side pipe as the depth reference; Select a floor boring machine including a CNC turntable, turn the workpiece, and when placing it, place the side pipe downward and the main pipe facing the spindle, level the end face of the side pipe, straighten the outer contour of the main pipe body, and bore the inner holes of each section of the main pipe with the end face of the main pipe as the depth reference; Rotate the turntable 180°, mill the bottom surface of the main pipe to be flush with the outer contour of the side pipe; use the end face of the main pipe as the axial reference plane and circle the center with the outer contour of the main pipe to mill part of the outer contour of the main pipe; S8: The turntable rotates 90° and 180° respectively. Taking the body and end face of the main pipe as the reference, a coordinate system is set, and the transition area between the main pipe and the side pipe is milled, and the machining is completed.

2. The special-shaped nozzle forging according to claim 1, characterized in that, A first protrusion (14) is provided on the side surface of the end of the main pipe (1), and a chamfer (15) is provided on the protrusion at the end close to the side pipe (2).

3. The special-shaped nozzle forging according to claim 1, characterized in that, A second protrusion (23) is provided on the side surface of the end of the side pipe (2).

4. The profiled nozzle forging according to claim 1, wherein An inward concave arc transition area (3) is provided at the inner right angle where the main pipe (1) and the side pipe (2) are connected.

5. The special-shaped nozzle forging according to claim 1, characterized in that, An outward convex arc surface (4) is provided at the outer right angle where the main pipe (1) and the side pipe (2) are connected.

6. The special-shaped nozzle forging according to claim 1, wherein, The upper waist-shaped hole (21) and the lower waist-shaped hole (22) are symmetrical about the diameter of the cross-sectional circle of the side pipe (2).

Images