A method for profiled forging of a double-port reinforced section of N08810 with a flange

Abstract

The application discloses a kind of N08810 double-port reinforced section with flanging profiling forging method, belong to forging forming technical field, it includes the following steps: S10, according to drawing requirement, determine the outer diameter of double-port reinforced section with flanging blank two ends connector, the outer diameter size of intermediate flanging flange;S20, by calculation, determine the material weight of double-port reinforced section with flanging;S30, make forming upper die, forming lower die and forming outer die;S40, forming outer die is placed in the anvil of oil press, forming lower die is placed in forming outer die, blank is shaped and then loaded into forming lower die;S50, forming upper die is sleeved into the upper end of blank, until inserted into forming outer die;The anvil of oil press is pressed forming upper die, until the upper surface of forming upper die is flush with forming outer die, after blank demoulding water cooling.The upper and lower connector of double-port reinforced section with flanging and flanging are forged once, so that the metal streamline of forging is parallel to its shape, and the mechanical properties of forging are in the best state.

Description

Technical Field

[0001] This invention belongs to the field of forging forming technology, specifically relating to a contour forging method for N08810 with a double-flanged reinforcing section. Background Technology

[0002] To achieve a more reasonable stress distribution and avoid stress concentration areas on the weld, the design of pressure vessels such as fluidized bed reactors has gradually shifted to using reinforced sections with flanges. To further improve the reasonable stress distribution in the fluidized bed, the forging streamlines of the double-mouth reinforced section with flanges should be parallel to the stress direction during operation.

[0003] Because the double-flanged reinforcing section is located at a non-central position in the fluidized bed head, it is no longer a rotationally symmetrical shape. Traditional forging processes can only forge a simple rotating body outline. The outline of the double-flanged reinforcing section is machined using a machining center, which requires more material, is time-consuming to machine, and cuts off the metal flow lines, which is inconsistent with the force direction of the forging in the working state. Summary of the Invention

[0004] To overcome the shortcomings of the above-mentioned forming process, the purpose of this invention is to provide a contour forging method for a fluidized bed reactor with a double-nozzle reinforced section with flanges. The technical solution adopted by this invention is as follows:

[0005] A method for profile forging of N08810 with a double-flanged reinforcing section includes the following steps:

[0006] S10. Based on the drawing requirements of the flanged double-mouth reinforced section to be processed, and taking into account the volume shrinkage of N08810 material solution treatment and machining allowance, determine the outer diameter of the pipes at both ends and the outer diameter of the flange in the middle of the blank of the flanged double-mouth reinforced section.

[0007] S20. Determine the material weight of the double-mouth reinforced section with flange through calculation;

[0008] S30. Make an upper forming mold, a lower forming mold, and an outer forming mold, and make centering lines on the three molds: the upper forming mold, the lower forming mold, and the outer forming mold.

[0009] S40. Place the outer forming mold on the lower anvil of the hydraulic press, place the lower forming mold in the outer forming mold, observe and align the centering line of the lower forming mold with the centering line of the outer forming mold, and then insert the shaped blank into the lower forming mold.

[0010] S50. Insert the upper forming mold into the upper end of the blank until it is inserted into the outer forming mold; align the centering line of the upper forming mold with the centering line of the outer forming mold, and press the upper forming mold down with the anvil of the hydraulic press until the upper surface of the upper forming mold is flush with the outer forming mold. After the blank is demolded, it is water-cooled; if the measured dimensions are qualified, a double-mouth reinforced section with flanges can be obtained.

[0011] Further, in step S10, based on the requirements of the double-mouth reinforced section with flange to be processed, the outer diameter of the flanged flange of the blank with flanged double-mouth reinforced section is determined to be Φa1, the outer diameter of the blank of the upper end pipe is Φa2, the outer diameter of the blank of the lower end oblique pipe is Φa4, the height of the long side of the upper end of the flanged flange is h1, the height of the short side is h2, the height of the long side of the lower end of the flanged flange is h3, the height of the short side is h4, and the thickness of the flanged flange in the vertical direction is h5. That is, the total height of the blank of the double-mouth reinforced section with flange is h2+h5+h3.

[0012] Further, in step S20, based on the blank dimensions of the double-edged reinforced section with flange determined in step S10, the blank volume V1 and the blank weight are calculated.

[0013] Further, in step S30, the process of creating the outer forming mold of the mold includes the following steps:

[0014] The inner diameter of the forming outer mold is Φd1, which is the outer diameter of the blank flange; the height of the forming outer mold is h2+h5+h3+h6, where h6 is the height of the forming upper mold pad; the deformation resistance of N08810 during upsetting is determined by test, the strength required for the forming outer mold to withstand the deformation resistance is estimated, and the diameter of the forming outer mold ΦD is determined.

[0015] A Φ1m longitudinal groove is engraved in the same direction on both the outer and inner diameters of the forming mold to serve as a centering line.

[0016] Further, in step S30, the process of creating the upper forming mold includes the following steps:

[0017] The upper inner diameter of the forming upper mold is Φa2, and a 10° demolding taper is machined downwards; the outer diameter of the forming upper mold is Φa1, which is smaller than the inner diameter of the forming outer mold; the upper end of the forming upper mold is made into a stepped shape; and a forming upper mold pad with a height of h6, which is smaller at the top and larger at the bottom, is added inside the forming upper mold to hold the forming upper mold on the upper end of the blank; the long side height of the forming upper mold is h1+h6, and the short side height is h2+h6.

[0018] The outer diameter of the long side of the upper forming mold is engraved with a Φ1mm longitudinal groove as a centering line.

[0019] Further, in step S30, the process of creating the lower forming mold includes the following steps:

[0020] The lower end inner diameter of the forming lower mold is Φa4, and a 10° demolding taper is machined upwards. The outer diameter of the forming lower mold is Φa3, which is smaller than the inner diameter of the forming outer mold. The long side height of the forming lower mold is h3, and the short side of the forming lower mold is flattened, with a short side height of h4.

[0021] The outer diameter of the long side of the forming lower mold is engraved with a Φ1mm longitudinal groove as a centering line.

[0022] Further, in step S20, after determining the weight of the material required for the double-edged reinforcing section with flanges, the blank is cut into pieces. The cutting process includes the following steps:

[0023] According to the principle of constant volume, the volume of the billet V2 = the volume of the blank V1;

[0024] After the billet has undergone sufficient upsetting and drawing deformation, it is produced as a round bar with a diameter of Φa5=Φa2-20mm and a length of L.

[0025] Heat the billet to 1150℃.

[0026] Further, in step S50, the hydraulic press presses down the upper forming die until the upper surface of the upper forming die is flush with the outer forming die, and the stroke of the upper anvil of the hydraulic press is L+h6-H.

[0027] The beneficial effects of this invention are:

[0028] Based on the shape and structure of the forging, this invention uses a simple mold combination to forge the upper and lower connecting pipes and the flange of the double-mouth reinforcing section with flanges in one step. This ensures that the metal flow lines of the forging are parallel to its shape and, in the working state, parallel to the stress direction, thus optimizing the mechanical properties of the forging. Simultaneously, through contour forging, the machining time on CNC lathes is significantly shortened, reducing raw material consumption. Attached Figure Description

[0029] Figure 1 This is a structural diagram of the double-mouth reinforced section with flange in the present invention N08810;

[0030] Figure 2 This is a cross-sectional view of the double-mouth reinforced section with flange in the present invention N08810;

[0031] Figure 3 This is a top view of the double-mouth reinforced section with flange in the present invention N08810;

[0032] Figure 4 This is a cross-sectional view of the forming upper die of the present invention N08810 with a flanged double-mouth reinforcing section;

[0033] Figure 5 This is a cross-sectional view of the forming lower die of the present invention N08810 with a flanged double-mouth reinforcing section;

[0034] Figure 6 This is a cross-sectional view of the outer mold of the present invention N08810 with a flanged double-mouth reinforcing section;

[0035] Figure 7 This is a schematic diagram of the assembly of the mold and blank for the double-mouthed reinforced section with flange of the present invention N08810;

[0036] Figure 8 This is a schematic diagram of the state of the forging in the mold when the forging of the double-flanged reinforcing section with flanges of the present invention N08810 is completed;

[0037] Figure 9 This is a structural diagram of the blank of the present invention N08810 with a double-mouthed reinforced section with flanges;

[0038] Figure 10 This is a top view of the blank of the present invention N08810 with a double-mouthed reinforced section with flanges.

[0039] Among them, 1. upper end pipe; 2. lower end oblique pipe; 3. flange; 4. forming upper mold; 5. forming upper mold pad; 6. forming lower mold; 7. forming outer mold. Detailed Implementation

[0040] This invention provides a contour forging method for N08810 with a double-flanged reinforcing section. The technical solution of this invention will be described in detail below with reference to the accompanying drawings to make it easier to understand and master.

[0041] Example 1

[0042] A method for forging N08810 with a flanged double-edged reinforcing section involves using free forging to produce a billet before die forging. The billet is then upsetting and drawing to break down its internal grains. After shaping, it is forged using a die. The specific forging method includes the following steps:

[0043] S10. Based on the drawing requirements of the flanged double-mouth reinforced section to be processed, and considering the volume shrinkage of N08810 material after solution treatment and machining allowance, determine the outer diameter of the two end pipes and the outer diameter of the three flanges in the middle of the blank of the flanged double-mouth reinforced section.

[0044] In this embodiment, a double-mouth reinforced section with flanges is processed as needed. Figure 1 , Figure 2 , Figure 3 The requirements are as follows: ΦA1 is the outer diameter of the lower inclined pipe 2, ΦA2 is the inner diameter of the upper pipe 1, ΦA4 is the outer diameter of the flange 3, C is the flange thickness of the flange 3, L1 is the height of the double-mouth reinforcing section with flange; SR is the radius of the lower edge line of the flange 3; and E is the distance from the center line of the end cap.

[0045] The outer diameter of the flange 3 of the blank with double-mouth reinforcement is determined to be Φa1, the outer diameter of the blank of the upper end pipe 1 is Φa2, the outer diameter of the blank of the lower end oblique pipe 2 is Φa4, the height of the upper long side of the flange 3 is h1, the height of the short side is h2, the height of the lower long side of the flange 3 is h3, the height of the short side is h4, and the thickness of the flange 3 in the vertical direction is h5. That is, the total height of the blank of the double-mouth reinforcement section of flange 3 is h2+h5+h3.

[0046] Among them, the double-flanged reinforced section with flanges can be processed as needed, such as: Figure 1 , Figure 2 , Figure 3 As required, in the top view of the double-mouth reinforced section with flange, the flange 3 protrusion is elliptical, see... Figure 3 When manufacturing forgings, simplify them to a perfect circle, see... Figure 10 The outer diameter of the flange 3 on the blank is Φd1 = ΦA4 + forging allowance; the outer diameter of the upper end of the blank connecting pipe 1 is Φa2 = ΦA3 + forging allowance; the outer diameter of the lower end of the blank connecting pipe is Φa4 = ΦA1 + forging allowance. After leaving sufficient forging allowance for the thickness C of the flange 3, the heights h1 and h2 of the long side of the upper end of the blank flange, h3 and h4 of the short side of the lower end of the flange (the excess machining allowance at the lower part is flattened), and the vertical contour thickness h5 of the flange are determined by measuring the dimensions in the two-dimensional drawing software. That is, the total height of the oblique connecting pipe blank is h2 + h5 + h3. See details. Figure 9 .

[0047] S20. Determine the material weight of the double-mouth reinforced section with flange through calculation;

[0048] In this embodiment, based on the external dimensions of the blank with flanged double-mouth reinforcement section determined in step S10, the volume V1 and weight of the blank with flanged double-mouth reinforcement section are calculated.

[0049] S30. Make the upper forming mold 4, the lower forming mold 6 and the outer forming mold 7, and make centering lines on the three molds: the upper forming mold 4, the lower forming mold 6 and the outer forming mold 7.

[0050] In this embodiment, the process of making the outer mold 7 includes the following steps:

[0051] The inner diameter of the forming outer mold 7 is Φd1, which is the outer diameter of the blank flange; the height of the forming outer mold 7 = h2 + h5 + h3 + h6, where h6 is the height of the forming upper mold pad 5; the deformation resistance of N08810 during upsetting is determined by test, the strength required for the forming outer mold 7 to withstand the deformation resistance is estimated, and the diameter ΦD of the forming outer mold 7 is determined.

[0052] A Φ1m longitudinal groove is engraved in the same direction on both the outer and inner diameters of the forming outer mold 7 to serve as a centering line. Figure 6 .

[0053] In this embodiment, the process of making the upper forming mold 4 includes the following steps:

[0054] The upper inner diameter of the forming upper die 4 is Φa2. To facilitate demolding of the forging, a 10° demolding taper is machined downwards. The outer diameter of the forming upper die 4 is Φa1, which is about 10mm smaller than the inner diameter of the forming outer die 7. To prevent the forming upper die 4 from sliding down when it is fitted onto the forging blank, the upper end of the forming upper die 4 is made into a stepped shape. A forming upper die pad 5 with a height of h6, which is smaller at the top and larger at the bottom, is added inside the forming upper die 4 to hold the forming upper die 4 on the upper end of the blank. The long side height of the forming upper die 4 is h1+h6, and the short side height is h2+h6.

[0055] A Φ1mm longitudinal groove is engraved on the long outer diameter of the upper mold 4 as a centering line, see... Figure 4 .

[0056] In this embodiment, the lower forming mold 6 for making the mold includes the following steps:

[0057] The lower end inner diameter of the forming lower die 6 is Φa4. To facilitate demolding of the forging, a 10° demolding taper is machined upwards. The outer diameter of the forming lower die 6 is Φa3, which is about 10mm smaller than the inner diameter of the forming outer die 7. The long side height of the forming lower die 6 is h3. The finished double-flanged reinforced tube should have an elliptical flange 3 at the bottom. The simplified blank lower flange 3 will eventually be machined off. In order to maintain the rigidity of the lower die, the short side of the forming lower die 6 is flattened, and the short side height is h4.

[0058] A Φ1mm longitudinal groove is engraved on the long side outer diameter of the lower forming mold 6 as a centering line.

[0059] In step S20, after determining the weight of the material required for the double-edged reinforcing section with flanges, the blank is cut into pieces. The cutting process includes the following steps:

[0060] According to the principle of constant volume, the volume of the billet V2 = the volume of the blank V1;

[0061] After the billet has undergone sufficient upsetting and drawing deformation, it is produced as a round bar with a diameter of Φa5=Φa2-20mm and a length of L=(4*V2 / 3.14)^(-2); the billet is then heated to 1150℃.

[0062] S40. Place the outer forming mold 7 on the lower anvil of the hydraulic press, place the lower forming mold 6 in the outer forming mold 7, observe and align the centering line of the lower forming mold 6 with the centering line of the outer forming mold 7, and then insert the shaped blank into the lower forming mold 6.

[0063] S50. Insert the upper forming mold 4 into the upper end of the blank until it is inserted into the outer forming mold 7; align the centering line of the upper forming mold 4 with the centering line of the outer forming mold 7; press the upper forming mold 4 with the upper anvil of the hydraulic press until the upper surface of the upper forming mold 4 is flush with the outer forming mold 7; after the blank is demolded, it is water-cooled; once the measured dimensions are qualified, a double-mouth reinforced section with flanges can be obtained.

[0064] In this embodiment, the hydraulic press presses down the upper forming mold 4 until the upper surface of the upper forming mold 4 is flush with the outer forming mold 7. The stroke of the upper anvil of the hydraulic press is L+h6-H, where H is the height of the outer forming mold 7.

[0065] The present invention provides a method for forging a double-flanged reinforcing section with flange 3 using a 3500-ton hydraulic press.

[0066] The technical solutions of the present invention have been fully described above. It should be noted that the specific embodiments of the present invention are not limited to the above description. All technical solutions formed by those skilled in the art based on the spirit and essence of the present invention by adopting equivalent transformations or equivalent transformations in terms of structure, method or function fall within the protection scope of the present invention.

Claims

1. A method for profile forging of N08810 with a double-flanged reinforcing section, characterized in that, Includes the following steps: S10. Based on the drawing requirements of the flanged double-mouth reinforced section to be processed, and taking into account the volume shrinkage of N08810 material solution treatment and machining allowance, determine the outer diameter of the pipes at both ends and the outer diameter of the flange in the middle of the blank of the flanged double-mouth reinforced section. S20. Determine the material weight of the double-mouth reinforced section with flange through calculation; S30. Make an upper forming mold, a lower forming mold, and an outer forming mold, and make centering lines on the three molds: the upper forming mold, the lower forming mold, and the outer forming mold. S40. Place the outer forming mold on the lower anvil of the hydraulic press, place the lower forming mold in the outer forming mold, observe and align the centering line of the lower forming mold with the centering line of the outer forming mold, and then insert the shaped blank into the lower forming mold. S50. Insert the upper forming die onto the upper end of the blank until it is inserted into the outer forming die; align the centering line of the upper forming die with the centering line of the outer forming die; press down the upper forming die with the anvil of the hydraulic press until the upper surface of the upper forming die is flush with the outer forming die; after the blank is demolded, it is water-cooled; if the measured dimensions are qualified, a double-flanged reinforced section with flanges can be obtained; In step S10, based on the requirements of the double-flanged reinforced section to be processed, the outer diameter of the flange of the blank is determined to be Φa1, the outer diameter of the blank of the upper pipe is Φa2, the outer diameter of the blank of the lower oblique pipe is Φa4, the height of the long side of the upper flange is h1, the height of the short side is h2, the height of the long side of the lower flange is h3, the height of the short side is h4, and the thickness of the flange in the vertical direction is h5. That is, the total height of the blank of the double-flanged reinforced section is h2+h5+h3. In step S20, based on the external dimensions of the blank with flanged double-mouth reinforcement section determined in step S10, the volume V1 and weight of the blank with flanged double-mouth reinforcement section are calculated; In step S30, the process of creating the outer forming mold includes the following steps: The inner diameter of the forming outer mold is Φd1, which is the outer diameter of the blank flange; the height of the forming outer mold is h2+h5+h3+h6, where h6 is the height of the forming upper mold pad; the deformation resistance of N08810 during upsetting is determined by test, the strength required for the forming outer mold to withstand the deformation resistance is estimated, and the diameter of the forming outer mold ΦD is determined. A Φ1m longitudinal groove is engraved in the same direction on both the outer and inner diameters of the forming mold to serve as a centering line; In step S30, the process of creating the upper forming mold includes the following steps: The upper inner diameter of the forming upper mold is Φa2, and a 10° demolding taper is machined downwards; the outer diameter of the forming upper mold is Φa1, which is smaller than the inner diameter of the forming outer mold; the upper end of the forming upper mold is made into a stepped shape; and a forming upper mold pad with a height of h6, which is smaller at the top and larger at the bottom, is added inside the forming upper mold to hold the forming upper mold on the upper end of the blank; the long side height of the forming upper mold is h1+h6, and the short side height is h2+h6. The outer diameter of the long side of the forming upper mold is engraved with a Φ1mm longitudinal groove as a centering line; In step S30, the process of creating the lower forming mold includes the following steps: The lower end inner diameter of the forming lower mold is Φa4, and a 10° demolding taper is machined upwards. The outer diameter of the forming lower mold is Φa3, which is smaller than the inner diameter of the forming outer mold. The long side height of the forming lower mold is h3, and the short side of the forming lower mold is flattened, with a short side height of h4. The outer diameter of the long side of the forming lower die is engraved with a Φ1mm longitudinal groove as a centering line; In step S20, after determining the weight of the material required for the double-edged reinforcing section with flanges, the blank is cut into pieces. The cutting process includes the following steps: According to the principle of constant volume, the volume of the billet V2 = the volume of the blank V1; After the billet has undergone sufficient upsetting and drawing deformation, it is produced as a round bar with a diameter of Φa5=Φa2-20mm and a length of L. Heat the billet to 1150℃.

2. The forging method for N08810 with flanged double-mouth reinforcing section according to claim 1, characterized in that, In step S50, the hydraulic press presses down the upper forming die until the upper surface of the upper forming die is flush with the outer forming die, and the stroke of the upper anvil of the hydraulic press is L+h6-H.

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