Machining process for combustion chamber supporting frame made of high-temperature alloy material

Abstract

The invention relates to a machining process for a combustion chamber supporting frame made of a high-temperature alloy material. Comprising the following steps: providing a combustion chamber support frame ring forge piece, roughly turning a bottom end inner hole, a step inner hole, a bottom end surface and a bottom end outer circle, roughly turning a step outer circle and a top end outer circle, roughly turning a top end surface, a top end inner hole and a top end inner hole bottom ring, semi-finely turning the step outer circle and the top end outer circle, semi-finely turning the top end surface, the top end inner hole and the top end inner hole bottom ring, cleaning and carrying out heat treatment. A step outer circle and a top end outer circle are subjected to finish turning; a top end face and a top end inner hole are subjected to finish turning; a window and an oval hole are formed in a top end inner hole bottom ring in a finish milling mode; and a top end inner hole bottom plate is subjected to finish turning. By the adoption of the machining process, all characteristic requirements of part drawings are fully met, meanwhile, the machining stability is guaranteed, and the efficiency and the qualified rate of machining of the combustion chamber supporting frame are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and specifically discloses a machining process for a combustion chamber support frame made of a high-temperature alloy material. Background Art

[0002] High-temperature alloy materials can have high strength at 700℃, good toughness and corrosion resistance in both high and low temperature environments. They are widely used in the manufacture of key components such as aircraft engine blades, turbine disks, combustion chambers, guide vanes, etc. These components work in high temperature, high stress, and high corrosion environments and need to withstand large thermal and mechanical loads. However, the material properties of high-temperature alloy materials that are easy to strain harden during machining and the thin walls of the combustion chamber support frame that are extremely easy to deform during machining make this type of product extremely difficult to process. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a machining process for a combustion chamber support frame made of a high-temperature alloy material with high stability and which can effectively improve efficiency and qualified rate.

[0004] According to the technical solution provided by the present invention, the machining process of the combustion chamber support frame made of high-temperature alloy is characterized in that the machining process includes the following steps: S1. Provide combustion chamber support frame ring forgings made of high temperature alloy; S2. Use a multi-claw chuck to clamp the top outer circle of the combustion chamber support frame ring forging, and rough-turn the bottom inner hole, bottom inner hole bottom surface, bottom end surface, bottom outer circle and top inner hole bottom ring of the combustion chamber support frame ring forging; S3, clamping the combustion chamber support frame ring forging onto the first tooling, wherein the first tooling includes a first receiving plate, a first bottom plate and a first positioning seat fixed together, positioning the bottom end inner hole of the combustion chamber support frame ring forging by the first positioning seat, positioning the bottom end surface of the combustion chamber support frame ring forging by the upper surface of the first bottom plate, pressing the prefabricated top end surface pressure plate on the top end surface of the combustion chamber support frame ring forging, rough turning the step surface, top end outer circle and middle outer circle of the combustion chamber support frame ring forging, and then removing the top end surface pressure plate; S4, pressing the prefabricated small end face pressing plate onto the small end face of the combustion chamber support frame ring forging, rough turning the top end face and the top end inner hole of the combustion chamber support frame ring forging, and then removing the small end face pressing plate; S5, pressing the prefabricated top surface pressure plate onto the top surface of the combustion chamber support frame ring forging, semi-finish turning the step surface, top outer circle and middle outer circle of the combustion chamber support frame ring forging, and then removing the top surface pressure plate; S6. Press the prefabricated small end face pressing plate onto the small end face of the combustion chamber support frame ring forging, semi-finish turning the top face and the top inner hole of the combustion chamber support frame ring forging, then remove the small end face pressing plate, and finally remove the combustion chamber support frame ring forging; S7, cleaning the combustion chamber support frame ring forging, and then drying the combustion chamber support frame ring forging; S8. heat treating the combustion chamber support frame ring forging; S9, clamp the combustion chamber support frame ring forging on the second tooling, the second tooling includes a second receiving plate and a second positioning seat fixed together, a raised second positioning seat positioning ring is provided at the center of the bottom end surface of the second positioning seat, the top inner hole of the combustion chamber support frame ring forging is positioned by the outer circle of the second positioning seat positioning ring, the top end surface of the combustion chamber support frame ring forging is positioned by the bottom end surface of the second positioning seat, the combustion chamber support frame ring forging is pressed on the second positioning seat by a prefabricated top inner hole pressing plate, the bottom inner hole, the bottom inner hole bottom surface, the bottom end surface and the bottom outer circle of the combustion chamber support frame ring forging are precision-turned to the finished product size design requirements, the top inner hole pressing plate is removed, and finally the combustion chamber support frame ring forging is removed; S10, clamping the combustion chamber support frame ring forging onto the first fixture, positioning the bottom end inner hole of the combustion chamber support frame ring forging by the first positioning seat, positioning the bottom end face of the combustion chamber support frame ring forging by the upper surface of the first bottom plate, pressing the prefabricated top end face pressing plate on the top end face of the combustion chamber support frame ring forging 1, finishing turning the step surface, top end outer circle and middle outer circle of the combustion chamber support frame ring forging to the finished product size design requirements, and then removing the top end face pressing plate; S11, pressing the prefabricated small end face pressing plate onto the small end face of the combustion chamber support frame ring forging, finishing turning the top face, top inner hole and top inner hole bottom ring of the combustion chamber support frame ring forging to the finished product size design requirements, then removing the small end face pressing plate, and finally removing the combustion chamber support frame ring forging; S12, prepare a third tooling, the third tooling comprising a mandrel and a disc coaxially fixed with the mandrel, a disc positioning ring being provided on the outer circle of the disc, first press-fit the combustion chamber support frame ring forging onto the third tooling, position the bottom end face of the combustion chamber support frame ring forging by the top end face of the disc positioning ring, position the bottom end inner hole and the step inner hole of the combustion chamber support frame ring forging by the outer circle of the disc above the disc positioning ring, press the prefabricated first step outer circle pressure plate on the step surface of the combustion chamber support frame ring forging, press the prefabricated small end face pressure block on the small end surface of the combustion chamber support frame ring forging, finely mill evenly distributed windows on the middle outer circle and the step surface of the combustion chamber support frame ring forging, finely mill an elliptical hole on the middle outer circle of the combustion chamber support frame ring forging between two adjacent windows, and then remove the first outer circle step surface pressure plate and the small end face pressure block; S13, pressing the prefabricated second step outer cylindrical pressure plate onto the step surface of the combustion chamber support frame ring forging between two adjacent windows, milling a notch on the top inner hole bottom ring corresponding to the window position, forming a top inner hole bottom plate between adjacent notches, then removing the second step outer cylindrical pressure plate, and finally removing the combustion chamber support frame ring forging; S14, clamp the combustion chamber support frame ring forging onto the fourth tooling, the fourth tooling includes a third receiving plate, a positioning outer ring and a positioning inner ring, the positioning outer ring positions the bottom outer circle of the combustion chamber support frame ring forging, the positioning inner ring positions the top inner hole of the combustion chamber support frame ring forging, the prefabricated bottom end face pressing plate is pressed against the bottom end face of the combustion chamber support frame ring forging, the top inner hole bottom plate is precision-turned to the finished product size design requirements, the bottom end face pressing plate is removed, and finally the combustion chamber support frame finished product is removed.

[0005] In step S1, at least 5 mm margin is left on one side from the outer circle of the combustion chamber support frame ring forging to the final finished product, at least 2.5 mm margin is left on one side from the top end face and the bottom end face of the combustion chamber support frame ring forging to the final finished product, and at least 2.5 mm margin is left on one side from the top inner hole and the bottom inner hole of the combustion chamber support frame ring forging to the final finished product.

[0006] Preferably, in step S2, at least 1 mm margin is left on one side from the bottom inner hole, the bottom surface of the bottom inner hole and the bottom outer circle of the combustion chamber support frame ring forging to the final product, and at least 1 mm margin is left on one side from the top inner hole bottom ring to the top inner hole bottom plate on the final product.

[0007] Preferably, in step S3, a margin of at least 1 mm is left on one side of the top outer circle, the step surface and the middle outer circle of the combustion chamber support frame ring forging to the final product.

[0008] Preferably, in step S4, at least 1 mm margin is left from the top surface of the combustion chamber support frame ring forging to the final product, and at least 1 mm margin is left from the top inner hole of the combustion chamber support frame ring forging to one side of the final product.

[0009] Preferably, in step S5, a margin of at least 0.5 mm is left on one side of the step surface, the top outer circle and the middle outer circle of the combustion chamber support frame ring forging to the final product.

[0010] Preferably, in step S6, at least 0.5 mm margin is left from the top surface of the combustion chamber support frame ring forging to the final product, and at least 0.5 mm margin is left from the top inner hole of the combustion chamber support frame ring forging to the final product on one side.

[0011] By adopting the machining process of the present invention, the stability of machining is ensured while fully meeting the requirements of various characteristics of the parts drawing, and the efficiency and qualification rate of machining the combustion chamber support frame are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the structural diagram of the first tooling.

[0013] Figure 2 yes Figure 1 Magnified view of part A in FIG.

[0014] Figure 3 This is the structural diagram of the second tooling.

[0015] Figure 4 This is the structural diagram of the third tooling.

[0016] Figure 5 It is a three-dimensional view of the combustion chamber support frame ring forging obtained through step S13.

[0017] Figure 6 This is the structural diagram of the fourth tooling. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0019] A machining process for a combustion chamber support frame made of a high-temperature alloy, characterized in that the machining process comprises the following steps: S1. Provide a combustion chamber support frame ring forging 1 made of high temperature alloy, with a single side margin of at least 5 mm from the outer circle of the combustion chamber support frame ring forging 1 to the final product, a single side margin of at least 2.5 mm from the top end face and the bottom end face of the combustion chamber support frame ring forging 1 to the final product, and a single side margin of at least 2.5 mm from the top inner hole and the bottom inner hole of the combustion chamber support frame ring forging 1 to the final product; S2. Use a multi-claw chuck to clamp the top outer circle of the combustion chamber support frame ring forging 1, and rough-turn the bottom inner hole 1.1, the bottom inner hole bottom surface 1.2, the bottom end surface 1.3, the bottom outer circle 1.4 and the top inner hole bottom ring of the combustion chamber support frame ring forging. Leave at least 1mm margin on one side from the bottom inner hole 1.1, the bottom inner hole bottom surface 1.2 and the bottom outer circle 1.4 of the combustion chamber support frame ring forging 1 to the final finished product, and leave at least 1mm margin on one side from the top inner hole bottom ring to the top inner hole bottom plate 1.13 on the final finished product; S3. Figure 2 The combustion chamber support ring forging 1 shown is clamped to the Figure 1On the first tooling 2 shown, the first tooling 2 includes a first receiving plate 2.1, a first bottom plate 2.2 and a first positioning seat 2.3 fixed together, the bottom end inner hole 1.1 of the combustion chamber support frame ring forging 1 is positioned by the first positioning seat 2.3, and the bottom end surface 1.3 of the combustion chamber support frame ring forging 1 is positioned by the upper surface of the first bottom plate 2.2, and the prefabricated top end surface pressing plate 3 is pressed on the top end surface 1.6 of the combustion chamber support frame ring forging 1, and the step surface 1.7, the top end outer circle 1.8 and the middle outer circle 1.9 of the combustion chamber support frame ring forging 1 are roughly turned, and the step surface 1.7, the top end outer circle 1.8 and the middle outer circle 1.9 of the combustion chamber support frame ring forging 1 are left with at least 1mm margin on one side of the final product, and then the top end surface pressing plate 3 is removed; S4, press the prefabricated small end face pressing plate 4 onto the small end face 1.5 of the combustion chamber support frame ring forging 1, and roughly turn the top face 1.6 and the top inner hole 1.9 of the combustion chamber support frame ring forging 1, leaving at least 1mm margin from the top face 1.6 of the combustion chamber support frame ring forging 1 to the final product, and leaving at least 1mm margin from the top inner hole 1.9 of the combustion chamber support frame ring forging 1 to the final product on one side, and then remove the small end face pressing plate 4; S5, press the prefabricated top surface pressing plate 3 onto the top surface 1.6 of the combustion chamber support frame ring forging 1, semi-finish turning the step surface 1.7, the top outer circle 1.8 and the middle outer circle 1.9 of the combustion chamber support frame ring forging 1, leaving at least 0.5mm margin on one side of the step surface 1.7, the top outer circle 1.8 and the middle outer circle 1.9 of the combustion chamber support frame ring forging 1 until the final product, and then remove the top surface pressing plate 3; S6, press the prefabricated small end face pressing plate 4 onto the small end face 1.5 of the combustion chamber support frame ring forging 1, semi-finish turn the top face 1.6 and the top inner hole 1.9 of the combustion chamber support frame ring forging 1, leave at least 0.5mm margin from the top face 1.6 of the combustion chamber support frame ring forging 1 to the final product, leave at least 0.5mm margin from the top inner hole 1.9 of the combustion chamber support frame ring forging 1 to the final product on one side, then remove the small end face pressing plate 4, and finally remove the combustion chamber support frame ring forging 1; S7, cleaning the combustion chamber support frame ring forging 1, and then drying the combustion chamber support frame ring forging 1; S8. heat treating the combustion chamber support frame ring forging; S9. Clamp the combustion chamber support ring forging in Figure 3On the second fixture 5 shown, the second fixture 5 includes a second receiving plate 5.1 and a second positioning seat 5.2 fixed together, and a raised second positioning seat positioning ring 5.3 is provided at the center of the bottom end surface of the second positioning seat 5.2, and the top inner hole 1.10 of the combustion chamber support frame ring forging 1 is positioned by the outer circle of the second positioning seat positioning ring 5.3, and the top end surface 1.6 of the combustion chamber support frame ring forging 1 is positioned by the bottom end surface of the second positioning seat 5.2, and the combustion chamber support frame ring forging 1 is pressed on the second positioning seat 5.2 by a prefabricated top inner hole pressing plate 6, and the bottom inner hole 1.1, the bottom inner hole bottom surface 1.2, the bottom end surface 1.3 and the bottom outer circle 1.4 of the combustion chamber support frame ring forging 1 are finely turned to the finished product size design requirements, and the top inner hole pressing plate 6 is removed, and finally the combustion chamber support frame ring forging 1 is removed; S10, clamp the combustion chamber support frame ring forging 1 onto the first tooling 2, locate the bottom end inner hole 1.1 of the combustion chamber support frame ring forging 1 by the first positioning seat 2.3, locate the bottom end face 1.3 of the combustion chamber support frame ring forging 1 by the upper surface of the first bottom plate 2.2, press the prefabricated top end face pressing plate 3 on the top end face 1.6 of the combustion chamber support frame ring forging 1, fine-turn the step surface 1.7, the top end outer circle 1.8 and the middle outer circle 1.9 of the combustion chamber support frame ring forging 1 to the finished product size design requirements, and then remove the top end face pressing plate 3; S11, pressing the prefabricated small end face pressing plate 4 onto the small end face 1.5 of the combustion chamber support frame ring forging 1, finishing the top face 1.6, the top inner hole 1.10 and the top inner hole bottom ring of the combustion chamber support frame ring forging 1 to the finished product size design requirements, then removing the small end face pressing plate 4, and finally removing the combustion chamber support frame ring forging 1; S12. Prepare Figure 4 The third tooling 7 shown in the figure comprises a mandrel and a disc 7.1 coaxially fixed with the mandrel, and a disc positioning ring 7.2 is provided on the outer circle of the disc 7.1. The combustion chamber support frame ring forging 1 is first pressed onto the third tooling 7, and the top surface of the disc positioning ring 7.2 is used to position the bottom end surface 1.3 of the combustion chamber support frame ring forging 1, and the outer circle of the disc 7.1 above the disc positioning ring 7.2 positions the bottom end inner hole 1.1 of the combustion chamber support frame ring forging 1 and the bottom end inner hole bottom surface 1.2, and the prefabricated first The stepped outer circle pressing plate 8 is pressed tightly on the stepped surface 1.7 of the combustion chamber support frame ring forging 1, and the prefabricated small end face pressing block 9 is pressed tightly on the small end face 1.5 of the combustion chamber support frame ring forging 1, and evenly distributed windows 1.11 are finely milled on the middle outer circle 1.9 and the stepped surface 1.7 of the combustion chamber support frame ring forging 1, and an elliptical hole 1.12 is finely milled on the middle outer circle 1.9 of the combustion chamber support frame ring forging 1 between two adjacent windows 1.11, and then the first outer circle stepped surface pressing plate 8 and the small end face pressing block 9 are removed; S13, press the prefabricated second step outer cylindrical pressure plate onto the step surface 1.7 of the combustion chamber support frame ring forging 1 between two adjacent windows 1.11, finely mill a notch on the top inner hole bottom ring at the corresponding window position, and form a top inner hole bottom plate 1.13 between adjacent notches, then remove the second step outer cylindrical pressure plate 9, and finally remove the combustion chamber support frame ring forging 1, as shown in FIG. Figure 5 As shown; S14. Clamp the combustion chamber support ring forging 1 to the Figure 6 On the fourth tooling 11 shown, the fourth tooling 11 includes a third receiving plate 11.1, a positioning outer ring 11.2 and a positioning inner ring 11.3. The positioning outer ring 11.2 positions the middle outer circle 1.9 of the combustion chamber support frame ring forging 1, and the positioning inner ring 11.3 positions the top inner hole 1.10 of the combustion chamber support frame ring forging 1. The prefabricated bottom end face pressure plate 12 is pressed against the bottom end face 1.3 of the combustion chamber support frame ring forging 1, and the top inner hole bottom plate 1.13 is precision-turned to the finished product size design requirements, and then the bottom end face pressure plate 12 is removed, and finally the combustion chamber support frame finished product is removed.

[0020] The principles and advantages of the present invention are as follows: 1. Since the combustion chamber support frame ring forging 1 is prone to accumulate machining stress during machining, the heat treatment process is performed after rough turning to eliminate the stress generated during machining.

[0021] 2. In order to prevent deformation during the clamping process, the present invention adopts the following Figure 1 The first tooling 2 shown is equipped with a top end surface pressing plate 3 and a small end surface pressing plate 4 for clamping.

[0022] 3. The combustion chamber support frame ring forging 1 made of high-temperature alloy is very easy to deform during the processing, especially in the process of milling and removing large excess. Therefore, it needs to be processed in the process route according to the rough-semi-finishing-finishing method. At the same time, in order to prevent the tool life and deformation caused by chip breaking after milling the flower contour, window milling is performed after fine turning.

[0023] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A machining process for a combustion chamber support frame made of a high temperature alloy, characterized in that The processing technology includes the following steps: S1. Providing a combustion chamber support frame ring forging (1) made of a high temperature alloy; S2. Clamp the top outer circle of the combustion chamber support frame ring forging (1) with a multi-claw chuck, and rough-turn the bottom inner hole (1.1), the bottom inner hole bottom surface (1.2), the bottom end surface (1.3), the bottom outer circle (1.4) and the top inner hole bottom ring of the combustion chamber support frame ring forging; S3, clamping the combustion chamber support frame ring forging (1) onto the first tooling (2), wherein the first tooling (2) comprises a first receiving plate (2.1), a first bottom plate (2.2) and a first positioning seat (2.3) fixed together, positioning the bottom end inner hole (1.1) of the combustion chamber support frame ring forging (1) by the first positioning seat (2.3), positioning the bottom end surface (1.3) of the combustion chamber support frame ring forging (1) by the upper surface of the first bottom plate (2.2), pressing the prefabricated top end surface pressing plate (3) onto the top end surface (1.6) of the combustion chamber support frame ring forging (1), rough turning the top end outer circle (1.8), the step surface (1.7), the middle outer circle (1.9) and the small end surface (1.5) of the combustion chamber support frame ring forging (1), and then removing the top end surface pressing plate (3); S4, pressing the prefabricated small end surface pressing plate (4) onto the small end surface (1.5) of the combustion chamber support frame ring forging (1), rough turning the top end surface (1.6) and the top end inner hole (1.10) of the combustion chamber support frame ring forging (1), and then removing the small end surface pressing plate (4); S5, pressing the prefabricated top surface pressing plate (3) onto the top surface (1.6) of the combustion chamber support frame ring forging (1), semi-finish turning the top outer circle (1.8), the step surface (1.7), the middle outer circle (1.9) and the small end surface (1.5) of the combustion chamber support frame ring forging (1), and then removing the top surface pressing plate (3); S6, pressing the prefabricated small end surface pressing plate (4) onto the small end surface (1.5) of the combustion chamber support frame ring forging (1), semi-finish turning the top surface (1.6) and the top inner hole (1.10) of the combustion chamber support frame ring forging (1), then removing the small end surface pressing plate (4), and finally removing the combustion chamber support frame ring forging (1); S7, cleaning the combustion chamber support frame ring forging (1), and then drying the combustion chamber support frame ring forging (1); S8. heat treating the combustion chamber support frame ring forging; S9. Clamp the combustion chamber support frame ring forging on the second tooling (5). The second tooling (5) includes a second receiving plate (5.1) and a second positioning seat (5.2) fixed together. A raised second positioning seat positioning ring (5.3) is provided at the center of the bottom end surface of the second positioning seat (5.2). The top inner hole (1.10) of the combustion chamber support frame ring forging (1) is positioned by the outer circle of the second positioning seat positioning ring (5.3). The bottom end surface of the second positioning seat (5.2) is positioned. The top surface (1.6) of the combustion chamber support frame ring forging (1) is pressed against the second positioning seat (5.2) by a prefabricated top inner hole pressing plate (6), and the bottom inner hole (1.1), the bottom inner hole bottom surface (1.2), the bottom end surface (1.3) and the bottom outer circle (1.4) of the combustion chamber support frame ring forging (1) are precision-turned to the finished product size design requirements, the top inner hole pressing plate (6) is removed, and finally the combustion chamber support frame ring forging (1) is removed; S10, clamping the combustion chamber support frame ring forging (1) onto the first tooling (2), positioning the bottom end inner hole (1.1) of the combustion chamber support frame ring forging (1) by the first positioning seat (2.3), positioning the bottom end surface (1.3) of the combustion chamber support frame ring forging (1) by the upper surface of the first bottom plate (2.2), pressing the prefabricated top end surface pressing plate (3) onto the top end surface (1.6) of the combustion chamber support frame ring forging (1), fine turning the top end outer circle (1.8), the step surface (1.7), the middle outer circle (1.9) and the small end surface (1.5) of the combustion chamber support frame ring forging (1), and then removing the top end surface pressing plate (3); S11, pressing the prefabricated small end face pressing plate (4) onto the small end face (1.5) of the combustion chamber support frame ring forging (1), finishing turning the top end face (1.6), the top end inner hole (1.10) and the top end inner hole bottom ring of the combustion chamber support frame ring forging (1) to the finished product size design requirements, then removing the small end face pressing plate (4), and finally removing the combustion chamber support frame ring forging (1); S12, prepare a third tooling (7), the third tooling (7) comprising a mandrel and a disc (7.1) coaxially fixed with the mandrel, a disc positioning ring (7.2) being provided on the outer circumference of the disc (7.1), first press-fit the combustion chamber support frame ring forging (1) onto the third tooling (7), the top end surface of the disc positioning ring (7.2) positioning the bottom end surface (1.3) of the combustion chamber support frame ring forging (1), the outer circumference of the disc (7.1) above the disc positioning ring (7.2) positioning the bottom end inner hole (1.1) of the combustion chamber support frame ring forging (1) and the bottom end inner hole bottom surface (1.2), and place the prefabricated first The stepped outer circle pressure plate (8) is pressed against the stepped surface (1.7) of the combustion chamber support frame ring forging (1), the prefabricated small end face pressure block (9) is pressed against the small end face (1.5) of the combustion chamber support frame ring forging (1), evenly distributed windows (1.11) are finely milled on the middle outer circle (1.9) and the stepped surface (1.7) of the combustion chamber support frame ring forging (1), an elliptical hole (1.12) is finely milled on the middle outer circle (1.9) of the combustion chamber support frame ring forging (1) between two adjacent windows (1.11), and then the first outer circle stepped surface pressure plate (8) and the small end face pressure block (9) are removed; S13, pressing the prefabricated second step outer cylindrical pressure plate onto the step surface (1.7) of the combustion chamber support frame ring forging (1) between two adjacent windows (1.11), milling a notch on the top inner hole bottom ring at the position corresponding to the window (1.11), forming a top inner hole bottom plate (1.13) between adjacent notches, then removing the second step outer cylindrical pressure plate, and finally removing the combustion chamber support frame ring forging (1); S14, clamping the combustion chamber support frame ring forging (1) onto the fourth tooling (11), the fourth tooling (11) comprising a third receiving plate (11.1), a positioning outer ring (11.2) and a positioning inner ring (11.3), positioning the middle outer circle (1.9) of the combustion chamber support frame ring forging (1) by the positioning outer ring (11.2), positioning the top inner hole (1.10) of the combustion chamber support frame ring forging (1) by the positioning inner ring (11.3), pressing the bottom end surface (1.3) of the combustion chamber support frame ring forging (1) with a prefabricated bottom end surface pressing plate (12), finishing turning the top inner hole bottom plate (1.13) to the finished product size design requirement, then removing the bottom end surface pressing plate (12), and finally removing the finished combustion chamber support frame.

2. The machining process of the combustion chamber support frame made of high temperature alloy as claimed in claim 1, characterized in that: In S1, at least 5 mm margin is left on one side of the outer circle of the combustion chamber support frame ring forging (1) to the final product, at least 2.5 mm margin is left on one side of the top end surface and the bottom end surface of the combustion chamber support frame ring forging (1) to the final product, and at least 2.5 mm margin is left on one side of the top end inner hole and the bottom end inner hole of the combustion chamber support frame ring forging (1) to the final product.

3. The machining process of the combustion chamber support frame made of high temperature alloy as claimed in claim 1, characterized in that: In step S2, at least 1 mm margin is left on one side from the bottom inner hole (1.1), the bottom inner hole bottom surface (1.2) and the bottom outer circle (1.4) of the combustion chamber support frame ring forging (1) to the final product, and at least 1 mm margin is left on one side from the top inner hole bottom ring to the top inner hole bottom plate (1.13) on the final product.

4. The machining process of the combustion chamber support frame made of high temperature alloy as claimed in claim 1, characterized in that: In step S3, a margin of at least 1 mm is left on one side of the step surface (1.7), the top outer circle (1.8) and the middle outer circle (1.9) of the combustion chamber support frame ring forging (1) to the final product.

5. The machining process of the combustion chamber support frame made of high temperature alloy as claimed in claim 1, characterized in that: In step S4, a margin of at least 1 mm is left between the top surface (1.6) of the combustion chamber support frame ring forging (1) and the final product, and a margin of at least 1 mm is left between the top inner hole (1.10) of the combustion chamber support frame ring forging (1) and one side of the final product.

6. The machining process of the combustion chamber support frame made of high temperature alloy as claimed in claim 1, characterized in that: In step S5, a margin of at least 0.5 mm is left on one side of the step surface (1.7), the top outer circle (1.8) and the middle outer circle (1.9) of the combustion chamber support frame ring forging (1) to the final product.

7. The machining process of the combustion chamber support frame made of high temperature alloy as claimed in claim 1, characterized in that: In step S6, a margin of at least 0.5 mm is left from the top surface (1.6) of the combustion chamber support frame ring forging (1) to the final product, and a margin of at least 0.5 mm is left from the top inner hole (1.10) of the combustion chamber support frame ring forging (1) to one side of the final product.

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