A forging method for aviation hub

Abstract

The present invention relates to a forging method for an aviation wheel hub, comprising the processes of material preparation, preform, preforging, first final forging, second final forging, third final forging, and heat treatment. In the heating process of the first final forging, the second final forging, and the third final forging, the heating temperature is 400°C, and the holding time is 190min-220min, 100min-150min, and 80min-110min, respectively, and the third final forging is an inorganic machining process. In the heat treatment process, the quenching temperature is 500°C, the holding time is 270min-320min, the artificial aging heating temperature is 160°C, and the holding time is 500min. The tensile strength of the aviation wheel hub forging prepared by the present invention is increased by 3% to 14.9% compared with the aviation wheel hub forging prepared by the traditional method, and the microstructure defects are significantly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum alloy forging and molding, and in particular relates to a forging and molding method for an aviation wheel hub. Background Art

[0002] In the production and manufacturing of aluminum alloy wheel hub forgings, the commonly used process methods are blanking - free forging billet (upsetting, rounding) - rough forging billet - multi-fire die forging - heat treatment. Wheel hub forgings are key parts and require higher mechanical properties to ensure safe use. In the production of a certain wheel hub forging, the mechanical properties of the wheel hub forgings fluctuated greatly, affecting the quality of the forgings. Statistical analysis of multiple batches of wheel hub forgings showed that the large fluctuations in mechanical properties were all concentrated in the spoke position. First, randomly select a furnace to cut the unqualified wheel hub again, and the cutting position remains the same as the first cutting. Perform high-magnification structure analysis on each sampling position, and compare the mechanical properties test results based on the structure analysis results. It was found that the high-magnification structure of the forging had metallurgical defects at the spoke. Compared with the high-magnification samples at other positions, no residual cast structure was found. At the same time, the whole forging forming process is simulated. The simulation adopts a one-ninth model. Taking a certain section as an example, the material flow in the whole forming process is analyzed, the material flow at the spoke is tracked, and the position of the material at the spoke corresponding to the bar is located. Then, a high-magnification analysis is performed on this position of the bar. Through high-magnification analysis, it is found that there is residual cast structure at the position corresponding to the bar. By comparing the high-magnification structure of three positions evenly distributed radially from the inside to the outside of the bar, the surface grains are small and uniform, and there is no residual cast structure. The closer to the core, the gradually coarser the grains, and the residual cast structure shows an increasing trend.

[0003] Through analysis and dissection, it can be seen that the quality of raw materials used in the production of forgings has a key impact on the final quality of forgings. Usually in the forging process, repeated upsetting, multi-directional upsetting or cross upsetting can improve the raw materials used in the production of forgings to a certain extent. However, the above methods are all for improving the overall bar material, without clear goals, and at the same time, they cannot improve the quality of the core material, especially for the improvement of the quality of the material in the difficult-to-deform area during upsetting. Summary of the invention

[0004] In order to overcome the problem that insufficient local deformation leads to poor improvement of the internal structure of the bar and ultimately affects the quality of the forging during the forging of aluminum alloy wheels, the present invention proposes a forging method for aviation wheels.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A forging method for an aviation wheel hub comprises the following steps:

[0007] Step 1, material preparation

[0008] The material used for aviation wheel forging is 2A14 aluminum alloy, with a diameter of 250mm, round bar material, and a length of L, L = 485mm ~ 560mm.

[0009] Step 2, preform

[0010] The selected material is preformed, and the preform includes heating and upsetting processes to obtain the preform.

[0011] Step 3, pre-forging

[0012] Pre-forging consists of heating, pre-forging and air cooling. The specific process is as follows:

[0013] Step 1: Heating

[0014] The preform is placed in a heating device for heating, the heating temperature is T2, T2=400°C, the insulation time is t2, t2=205min~250min, and a heated preform is obtained.

[0015] The second step is pre-forging

[0016] The heated preform is placed in a pre-forging die and forged using a forging device. The slider of the forging device is pressed downward at a pressing rate of V1, V1 = 3 mm / s, until the pre-forging die is closed to obtain a pre-forged preform.

[0017] Step 3: Air Cooling

[0018] After the pre-forging die is closed, the lower slide of the die is lifted, and then the pre-forged preform is clamped out and placed on a cooling rack to be air-cooled to room temperature to obtain a pre-forged billet.

[0019] Step 4: First final forging

[0020] The first final forging consists of heating, forging, air cooling and machining. The specific process is:

[0021] Step 1: Heating

[0022] The pre-forged billet is placed in a heating device for heating, the heating temperature is T2, T2=400°C, the insulation time is t3, t3=190min~220min, and a heated pre-forged billet is obtained.

[0023] The second step is forging

[0024] Place the heated pre-forged billet into the final forging die, press the slider of the final forging die downward at a rate of 1 mm / s, and after the final forging die is closed, lift the lower slider of the final forging die.

[0025] A final forging billet 1 preform is obtained.

[0026] Step 3: Air Cooling

[0027] Take out the final forging billet 1 preform from the final forging die and place it on a cooling rack to air cool to room temperature.

[0028] An air-cooled final forging billet 1 preform is obtained.

[0029] Step 4: Machining

[0030] The air-cooled final forging 1 preform is processed by mechanical processing equipment, the fixture is installed with the small end face of the hub as the reference, and the end face of the center part of the hub is turned until the height difference between the end face of the center part of the hub and the large end face of the hub is L1, L1 = 50mm ~ 90mm, the height of the end face of the center part of the hub is higher than the height of the large end face of the hub, and the rounded corners are R, R = 6mm.

[0031] The final forging billet 1 is obtained.

[0032] Step 5: Second final forging

[0033] The final forging blank 1 obtained in step 4 is subjected to a second final forging, which comprises heating, forging, air cooling and machining processes. The difference from the first final forging is that the holding time in the heating process of the first step is t4, t4=100min~150min.

[0034] The final forging billet 2 is obtained.

[0035] Step 6, third final forging

[0036] The final forging blank 2 obtained in step 5 is subjected to a third final forging, which consists of heating, forging, air cooling, and machining processes. The difference from the first final forging is that the holding time in the first heating process is t5, t5 = 80 min ~ 110 min, and there is no mechanical machining process.

[0037] The final forging billet 3 is obtained.

[0038] Step 7, Heat Treatment

[0039] The final forging billet 3 obtained in step 6 is heat treated, and the heat treatment consists of quenching and artificial aging processes. The quenching temperature is T3, T3 = 500°C, and the aging temperature is T4, T4 = 160°C.

[0040] At this point, the aviation wheel hub forging is obtained.

[0041] In the forging method, in step 2, the specific process of the preform is:

[0042] Step 1: Heating

[0043] The round bar material is heated in a heating device, the heating temperature is T1, T1=470°C, and the insulation time is t1, t1=600min~615min.

[0044] Step 2: Upsetting

[0045] First, the round bar is upset along the axial direction until the height of the round bar is H1, H1 = 175mm ~ 185mm. Secondly, it is rounded to a diameter of φ1, φ1 = 405mm ~ 425mm. Thirdly, it is punched along the center line of the round bar. The center line of the through hole formed by the punching coincides with the axial center line of the round bar after rounding. The punching diameter is φ2, φ2 = 100mm. Finally, it is leveled to a height of H2, H2 = 165mm ~ 176mm.

[0046] A preform is obtained.

[0047] In the forging method described above, in step 5, the specific process of the second final forging is:

[0048] Step 1: Heating

[0049] The final forging billet 1 obtained in step 4 is placed in a heating device for heating at a temperature of 400° C. for a holding time of t4, where t4=100 min to 150 min, to obtain a heated final forging billet 1.

[0050] The second step is forging

[0051] The heated final forging billet 1 is placed in the final forging die, and the slider of the final forging equipment is pressed down at a rate of 1 mm / s. After the die is closed, the lower slider of the final forging equipment is lifted.

[0052] The final forging billet 2 preform is obtained.

[0053] Step 3: Air Cooling

[0054] The final forging blank 2 preform is taken out from the final forging die and placed on a cooling rack to be air cooled to room temperature.

[0055] An air-cooled final forging billet 2 preform is obtained.

[0056] Step 4: Machining

[0057] The air-cooled final forging blank 2 preform is processed by mechanical processing equipment, and the small end face of the wheel hub is clamped as the reference, and the end face of the center of the wheel hub is turned until the height difference between the end face of the center of the wheel hub and the large end face of the wheel hub is L2, L2 = 10mm ~ 30mm, and the height of the end face of the center of the wheel hub is lower than the height of the large end face of the wheel hub. Then, the fixture is installed with the large end face of the wheel hub as the reference, and the small end face of the wheel hub is turned. The turning removal height is K1, K1 = 5mm ~ 10mm, and the rounded corners are R, R = 6mm.

[0058] The final forging billet 2 is obtained.

[0059] In the forging method described above, in step 6, the specific process of the third final forging is:

[0060] Step 1: Heating

[0061] The final forging billet 2 is placed in a heating device for heating, the heating temperature is 400° C., the holding time is t5, t5=80min~110min, and the heated final forging billet 2 is obtained.

[0062] The second step is forging

[0063] The heated final forging billet 2 is placed in the final forging die, and the slider of the final forging equipment is pressed down, and the pressing rate is equal to V2, V2 = 1mm / s. After the final forging die is closed, the lower slider of the final forging equipment is lifted.

[0064] The final forging billet 3 preform is obtained.

[0065] Step 3: Air Cooling

[0066] The final forging billet 3 preform is taken out from the final forging die and placed on a cooling rack to be air cooled to room temperature.

[0067] The final forging billet 3 is obtained.

[0068] In the forging method described above, in step 7, the specific process of the heat treatment is:

[0069] The first step, quenching

[0070] The final forging billet 3 is placed in a heating device for heating, the heating temperature is T3, T3 = 500 ° C, the holding time is t6, t6 = 270min ~ 320min, the quenching medium is water, the water entry time is t7, t7 = 15s, until it is completely cooled, and then taken out and dried.

[0071] The second step is artificial aging

[0072] The quenched final forging billet 3 is placed in an aging furnace for heating at a heating temperature of T4, T4=160°C, a holding time of t8, t8=500min, and after being taken out of the furnace, air-cooled to room temperature.

[0073] Get aviation wheel forgings.

[0074] The beneficial effects of the present invention are:

[0075] A forging method for aviation wheel hubs. It is difficult to improve the hard-to-deform area in the intermediate blanking process of forging. Even through complex and difficult multi-directional upsetting and cross upsetting, it is difficult to improve the material in the hard-to-deform area of ​​the core. Through the method of the present invention, the deformation of the core material can be quickly increased on the basis of simple upsetting and rounding blanking. That is, it can improve production efficiency and effectively improve the performance of forgings. The tensile strength of the forgings before and after using this method increased by 3% to 14.9%. By comparing the microstructure, the results show that the microstructure defects are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0077] Figure 1 A schematic diagram of sampling relevant parts of a forged aviation wheel hub;

[0078] Figure 2 It is a cross-sectional view of the preform along the center line;

[0079] Figure 3 It is a cross-sectional view of the pre-forged billet along the center line;

[0080] Figure 4 It is a cross-sectional view along the center line of the final forging billet 1;

[0081] Figure 5 It is a cross-sectional view along the center line of the final forging billet 2;

[0082] Figure 6 This is a cross-sectional view of an aviation wheel hub forging along the centerline.

[0083] In the figure, 1#. Transverse specimen of wheel rim; 2#. Longitudinal specimen of wheel rim; 3#. Transverse specimen of wheel rim; 4#. Transverse specimen of spoke; 5#. High-direction specimen of hub; A. Large end face of hub; B. End face of center part of hub; C. Small end face of hub. DETAILED DESCRIPTION

[0084] Example

[0085] A forging method for an aviation wheel hub comprises the following steps:

[0086] Step 1, material preparation

[0087] The material grade used for aviation wheel forging is 2A14, round bar material, diameter D, D = 250mm, length L, L = 485mm ~ 560mm.

[0088] Visually inspect the surface of the round bar and remove any surface defects if any.

[0089] Step 2, preform

[0090] Step 1: Heating

[0091] The round bar material is heated in a heating device, the heating temperature is T1, T1=470°C, and the insulation time is t1, t1=600min~615min.

[0092] Step 2: Upsetting

[0093] First, the round bar is upset along the axial direction until the height of the round bar is H1, H1 = 175mm ~ 185mm. Secondly, it is rounded to a diameter of φ1, φ1 = 405mm ~ 425mm. Thirdly, a hole is punched along the center line of the round bar. The center line of the through hole formed by the punching coincides with the axial center line of the round bar after rounding. The diameter of the hole is φ2, φ2 = 100mm. Finally, it is leveled to a height of H2, H2 = 165mm ~ 176mm. A preform is obtained. The preform formed by upsetting is as follows Figure 2 shown.

[0094] Step 3, pre-forging

[0095] Pre-forging consists of heating, pre-forging and air cooling. The specific process is as follows:

[0096] Step 1: Heating

[0097] The preform is placed in a heating device for heating, the heating temperature is T2, T2=400°C, the insulation time is t2, t2=205min~250min, and a heated preform is obtained.

[0098] The second step is pre-forging

[0099] The heated preform is placed in a pre-forging die and forged using a forging device. The slider of the forging device is pressed downward at a rate of V1, V1 = 3 mm / s, until the pre-forging die is closed to obtain a pre-forged preform.

[0100] Step 3: Air Cooling

[0101] After the pre-forging die is closed, the lower slide of the die is lifted, and then the pre-forging preform is clamped out and placed on a cooling rack to be air-cooled to room temperature to obtain a pre-forged billet. Figure 3 shown.

[0102] Step 4: First final forging

[0103] The first final forging consists of heating, forging, air cooling and machining. The specific process is as follows:

[0104] Step 1: Heating

[0105] The pre-forged billet is placed in a heating device for heating, the heating temperature is T2, T2 = 400°C, and the holding time is t3, t3 = 190min ~ 220min.

[0106] The second step is forging

[0107] Place the heated pre-forged billet into the final forging die, press the slider of the final forging die downward at a rate of 1 mm / s, and after the final forging die is closed, lift the lower slider of the final forging die.

[0108] A final forging billet 1 preform is obtained.

[0109] Step 3: Air Cooling

[0110] Take out the final forging billet 1 preform from the final forging die and place it on a cooling rack to air cool to room temperature.

[0111] An air-cooled final forging billet 1 preform is obtained.

[0112] Step 4: Machining

[0113] The air-cooled final forging 1 preform is processed by mechanical processing equipment, the fixture is installed with the small end face of the hub as the reference, and the end face of the center part of the hub is turned until the height difference between the end face of the center part of the hub and the large end face of the hub is L1, L1 = 50mm ~ 90mm, the height of the end face of the center part of the hub is higher than the height of the large end face of the hub, and the rounded corners are R, R = 6mm.

[0114] The final forging billet 1 is obtained, and the structure of the final forging billet 1 is as follows: Figure 4 shown.

[0115] Step 5: Second final forging

[0116] The second final forging consists of heating, forging, air cooling, and machining. The difference from the first final forging is that the holding time in the first step of heating is different. The specific process is as follows:

[0117] Step 1: Heating

[0118] The final forging billet 1 obtained in step 4 is placed in a heating device for heating at a temperature of 400° C. for a holding time of t4, where t4=100 min to 150 min, to obtain a heated final forging billet 1.

[0119] The second step is forging

[0120] The heated final forging billet 1 obtained by heating is placed in the final forging die, and the equipment slider is pressed down at a rate of 1 mm / s. After the die is closed, the lower slider is lifted.

[0121] The final forging billet 2 preform is obtained.

[0122] Step 3: Air Cooling

[0123] The final forging blank 2 preform is taken out from the final forging die and placed on a cooling rack to be air cooled to room temperature.

[0124] An air-cooled final forging billet 2 preform is obtained.

[0125] Step 4: Machining

[0126] The air-cooled final forging blank 2 preform is processed by mechanical processing equipment, and the small end face of the wheel hub is clamped as the reference, and the end face of the center of the wheel hub is turned until the height difference between the end face of the center of the wheel hub and the large end face of the wheel hub is L2, L2 = 10mm ~ 30mm, and the height of the end face of the center of the wheel hub is lower than the height of the large end face of the wheel hub. Then, the fixture is installed with the large end face of the wheel hub as the reference, and the small end face of the wheel hub is turned. The turning removal height is K1, K1 = 5mm ~ 10mm, and the rounded corners are R, R = 6mm.

[0127] The final forging billet 2 is obtained, and the structure of the final forging billet 2 is as follows: Figure 5 shown.

[0128] Step 6, third final forging

[0129] The third final forging consists of heating, forging, air cooling, and machining processes. The difference from the first final forging is that the holding time in the first step of heating is different, and there is no machining process. The specific process is as follows:

[0130] Step 1: Heating

[0131] The final forging billet 2 is placed in a heating device for heating, the heating temperature is 400° C., the holding time is t5, t5=80min~110min, and the heated final forging billet 2 is obtained.

[0132] The second step is forging

[0133] The heated final forging billet 2 is placed in the final forging die, and the slider of the final forging equipment is pressed down, and the pressing rate is equal to V2, V2 = 1mm / s. After the final forging die is closed, the lower slider of the final forging equipment is lifted.

[0134] The final forging billet 3 preform is obtained.

[0135] Step 3: Air Cooling

[0136] The final forging billet 3 preform is taken out from the final forging die and placed on a cooling rack to be air cooled to room temperature.

[0137] The final forging billet 3 is obtained.

[0138] Step 7, Heat Treatment

[0139] Heat treatment consists of quenching and artificial aging processes. The specific process is as follows:

[0140] The first step, quenching

[0141] The final forging billet 3 is placed in a heating device for heating, the heating temperature is T3, T3 = 500 ° C, the holding time is t6, t6 = 270min ~ 320min, the quenching medium is water, the water entry time is t7, t7 = 15s, until it is completely cooled, and then taken out and dried.

[0142] The second step is artificial aging

[0143] The quenched final forging billet 3 is placed in an aging furnace for heating at a heating temperature of T4, T4=160°C, a holding time of t8, t8=500min, and after being taken out of the furnace, air-cooled to room temperature.

[0144] At this point, the aviation wheel hub forging is obtained. The aviation wheel hub forging is as follows: Figure 6 shown.

[0145] Table 1 Process parameters

[0146] Example 1 Example 2 Example 3 L / mm 505 560 485 <![CDATA[φ1 / mm]]> 418 425 405 <![CDATA[H1 / mm]]> 185 180 175 <![CDATA[H2 / mm]]> 176 172 165 <![CDATA[t1 / min]]> 615 600 600 <![CDATA[t2 / min]]> 230 250 205 <![CDATA[t3 / min]]> 200 220 190 <![CDATA[t4 / min]]> 120 150 100 <![CDATA[t5 / min]]> 100 110 80 <![CDATA[t6 / min]]> 300 320 270 <![CDATA[L1 / mm]]> 70 90 50 <![CDATA[L2 / mm]]> 20 30 10 <![CDATA[K1 / mm]]> 10 5 10

[0147] Compared with the aviation hub forgings forged by the traditional method, the aviation hub forgings forged by the forging method for aviation hubs have significantly improved mechanical properties at weak positions. Taking the aviation hub forgings prepared in Example 1 as an example, the mechanical properties are compared in Table 2. It can be seen from Table 2 that after using this forging method, the tensile strength of the forgings is all positively improved, and the elongation of the 3# and 4# positions of the spokes is generally improved. This forging method is used because during the forging process of aluminum alloys, the internal energy storage of the forgings increases with the reasonable increase in deformation, and the grain size inside the forgings becomes smaller, which plays a role in fine grain strengthening.

[0148] Table 2 Comparison of mechanical properties of the wheel hub forged by the present invention and the wheel hub forged by the traditional process

[0149]

Claims

1. A forging method for an aviation wheel hub, characterized in that: The steps include: Step 1, material preparation: The material used for aviation wheel forging is 2A14 aluminum alloy, with a diameter of 250mm, round bar material, and a length of L. L = 485 mm ~ 560 mm; Step 2, preform: The selected 2A14 aluminum alloy material is preformed, and the preform includes heating and upsetting processes to obtain a preform; Step 3, pre-forging: The first step is heating: The preform is placed in a heating device for heating, the heating temperature is T2, T2=400°C, the holding time is t2, t2=205min-250min, and a heated preform is obtained; The second step is pre-forging: The heated preform is placed in a pre-forging die, and forged using a forging device. The slider of the forging device is pressed downward at a pressing rate of V1, V1 = 3 mm / s, until the pre-forging die is closed to obtain a pre-forged preform; Step 3: Air cooling: After the pre-forging die is closed, the lower slide of the die is lifted, and then the pre-forged preform is clamped out and placed on a cooling rack to be air-cooled to room temperature to obtain a pre-forged billet; Step 4, first final forging: The first step is heating: The pre-forged billet is placed in a heating device for heating, the heating temperature is T2, T2 = 400 ° C, the holding time is t3, t3 = 190 min ~ 220 min, to obtain a heated pre-forged billet; The second step is forging: Put the heated pre-forged billet into the final forging die, press the slider of the final forging die downward at a rate of 1 mm / s, and after the final forging die is closed, lift the lower slider of the final forging die; Obtaining a final forging blank 1 preform; Step 3: Air cooling: Take out the final forging billet 1 preform from the final forging die, place it on a cooling rack and air cool it to room temperature; Obtaining an air-cooled final forging billet 1 preform; Step 4: Machining: The air-cooled final forging 1 preform is processed by mechanical processing equipment, and the fixture is installed with the small end face of the hub as the reference, and the end face of the center of the hub is turned until the height difference between the end face of the center of the hub and the large end face of the hub is L1, L1 = 50mm ~ 90mm, the height of the end face of the center of the hub is higher than the height of the large end face of the hub, and the rounded corner at the sharp corner is R, R = 6mm; A final forging billet 1 is obtained; Step 5, second final forging: The final forging blank 1 obtained in step 4 is subjected to a second final forging. The second final forging comprises heating, forging, air cooling and machining processes. The difference from the first final forging is that the holding time in the heating process of the first step is t4. t4 = 100 min ~ 150 min; Obtaining a final forging billet 2; Step 6, third final forging: The final forging blank 2 obtained in step 5 is subjected to a third final forging. The third final forging comprises heating, forging, air cooling and machining processes. The difference from the first final forging is that the holding time in the heating process of the first step is t5. t5 = 80min ~ 110min, inorganic processing process; Obtaining a final forging billet 3; Step 7, heat treatment: The final forging billet 3 obtained in step 6 is heat treated, the heat treatment comprising quenching and artificial aging processes, the quenching temperature is T3, T3 = 500°C, and the aging temperature is T4, T4 = 160°C; At this point, the aviation wheel hub forging is obtained.

2. The forging method for an aviation hub according to claim 1, characterized in that: In step 2, the specific process of the preform is: The first step is heating: The round bar material is heated in a heating device, the heating temperature is T1, T1 = 470 ° C, and the holding time is t1, t1 = 600min ~ 615min; Step 2: Upsetting: First, the round bar is upset along the axial direction until the height of the round bar is H1, H1 = 175mm ~ 185mm; secondly, it is rounded to a diameter of φ1, φ1 = 405mm ~ 425mm; thirdly, it is punched along the center line of the round bar, the center line of the through hole formed by the punching coincides with the axial center line of the round bar after rounding, and the punching diameter is φ2, φ2 = 100mm; finally, it is leveled to a height of H2, H2 = 165mm ~ 176mm; A preform is obtained.

3. The forging method for an aviation hub according to claim 1, characterized in that: In step 5, the specific process of the second final forging is: The first step is heating: The final forging billet 1 obtained in step 4 is placed in a heating device and heated at a temperature of 400° C. to obtain a heated final forging billet 1; The second step is forging: The heated final forging billet 1 is placed in the final forging die, and the slider of the final forging equipment is pressed down at a rate of 1 mm / s. After the die is closed, the lower slider of the final forging equipment is lifted; Obtaining a final forging blank 2 preform; Step 3: Air cooling: Take out the final forging blank 2 preform from the final forging die, place it on a cooling rack and air cool it to room temperature; Obtaining an air-cooled final forging billet 2 preform; Step 4: Machining: The air-cooled final forging blank 2 preform is processed by mechanical processing equipment, and the small end face of the wheel hub is clamped as a reference, and the end face of the center of the wheel hub is turned until the height difference between the end face of the center of the wheel hub and the large end face of the wheel hub is L2, L2 = 10mm ~ 30mm, and the height of the end face of the center of the wheel hub is lower than the height of the large end face of the wheel hub; then, the fixture is installed with the large end face of the wheel hub as a reference, and the small end face of the wheel hub is turned, and the turning removal height is K1, K1 = 5mm ~ 10mm, and the rounded corners are R, R = 6mm; The final forging billet 2 is obtained.

4. The forging method for an aviation hub according to claim 1, characterized in that: In step 6, the specific process of the third final forging is: The first step is heating: The final forging billet 2 is placed in a heating device and heated at a temperature of 400° C. to obtain a heated final forging billet 2; The second step is forging: The heated final forging billet 2 is placed in the final forging die, and the slider of the final forging equipment is pressed down, and the pressing rate is equal to V2, V2 = 1mm / s. After the final forging die is closed, the lower slider of the final forging equipment is lifted; Obtaining a final forging blank 3 preform; Step 3: Air cooling: Take out the final forging billet 3 preform from the final forging die, place it on a cooling rack and air cool it to room temperature; The final forging billet 3 is obtained.

5. The forging method for an aviation hub according to claim 1, characterized in that: In step 7, the specific process of the heat treatment is: The first step, quenching: The final forging billet 3 is placed in a heating device for heating, the heating temperature is T3, T3 = 500 ° C, the holding time is t6, t6 = 270min ~ 320min, the quenching medium is water, the water entry time is t7, t7 = 15s, until it is completely cooled, and then taken out and dried; The second step is artificial aging: The quenched final forging billet 3 is placed in an aging furnace for heating at a heating temperature of T4, T4 = 160°C, and a holding time of t8, t8 = 500 min. After being taken out of the furnace, it is air-cooled to room temperature; Get aviation wheel forgings.

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