A method for integrally machining a cage-shaped structural part

Abstract

The present invention relates to the technical field of workpiece machining, and discloses a method for integral machining of a cage-shaped structural part, including machining a blank using a segmented machining method from rough to fine, from turning to milling, and performing auxiliary support on the inner and outer cylindrical surfaces of the blank during milling, and noting the weight of the semi-finished product before machining and the weight after the process is completed for each process. By using the above-mentioned machining method, the present invention solves the problem of poor structural rigidity caused by the large number of weight-reducing openings and assembly windows in the cage-shaped workpiece, and the problem that the rigidity gradually weakens after the machining allowance is gradually removed during the machining process, resulting in difficulty in clamping during machining and easy deformation after the machining is completed, thereby improving the machining efficiency and quality of the cage-shaped workpiece; by using auxiliary support components to support the crossbeam of the cage-shaped workpiece by lower support and upper pressure, the stability of the machining process is improved, and the machining efficiency and quality of the cage-shaped workpiece are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece machining, in particular to an integral machining method for a cage-shaped structural part. Background Art

[0002] With the continuous development of the aerospace industry, more and more high-precision parts with complex structures have emerged. The processing technology of these parts is different from that of traditional parts, with higher requirements and greater technical difficulty, so the processing process is more delicate and complex. In practical applications, a cage-shaped structural part has poor structural rigidity due to the large number of weight-reducing openings and assembly windows. During the processing, the rigidity gradually weakens after the machining allowance is gradually removed, resulting in difficulties in clamping during processing and easy deformation after the processing is completed. If the step window and weight-reducing groove are roughed first, and then the inner hole or outer circle is fine-turned, the turning tool is intermittently cut during processing, causing the tip of the tool to collide with the roughing part, the tool is severely worn or even the tip of the tool is broken and scrapped, and at the same time, it causes serious cutting marks on the surface of the workpiece or the tip of the tool is left in the workpiece after the tip collapses. The inner hole and outer circle connection marks are not allowed to exceed 0.3mm, so this process method cannot meet the quality and appearance requirements of the product. If the step window and weight-reducing groove are processed by wire cutting, this processing method cannot process the step structure, and the manufacturing cost is high, time-consuming and inefficient. If the step window and the weight-reducing groove are directly roughed, the rigidity of the workpiece structure will be reduced, and it will be difficult to support the fine milling stage, which will cause huge deformation. And because the parts are heavy and large, conventional general fixtures are difficult to clamp the parts on the equipment. Summary of the invention

[0003] The object of the present invention is to provide a method for integrally machining a cage-shaped structural part, so as to solve the problems of difficulty in clamping the cage-shaped structural part during machining using the existing process and easy deformation after machining.

[0004] The present invention is achieved through the following technical scheme: a method for integral mechanical processing of a cage-shaped structural part, which processes the blank by a segmented processing method from rough to fine, from turning to milling. During milling, auxiliary support is provided for the inner and outer cylindrical surfaces of the blank, and each process is noted with the weight of the semi-finished product before processing and the weight after the process is completed, which is a certain reference for hoisting and transfer.

[0005] In order to better realize the present invention, further, the specific processing method includes the following steps:

[0006] A. Heat treatment is performed on the purchased blanks after roughing to improve the rigidity of the materials;

[0007] B. Use the four-claw fixture on the CNC horizontal lathe to clamp the blank;

[0008] C. Rough turning and fine turning are performed on the blank material in sequence, so that the inner circle, outer circle and total length dimensions reach the predetermined values, and the semi-finished product is obtained;

[0009] D. Use one clamp and one top clamping method to clamp the semi-finished product on the four-axis equipment;

[0010] E. Rough milling is performed on the circumferential wall of the semi-finished product to produce step windows and weight-reducing grooves;

[0011] F. Provide auxiliary support for the inner and outer surfaces of the semi-finished products after rough milling;

[0012] G. Perform semi-finishing milling and finishing milling on the supported semi-finished material to obtain the finished product.

[0013] In order to better realize the present invention, further, in the rough turning stage in step C, both the inner and outer circles are cut, the four jaws directly clamp the outer circle, and the inner and outer circles are processed according to the size in combination with the center frame on the CNC horizontal lathe equipment;

[0014] In the fine turning stage of step C, when fine turning the inner circle, the four jaws are padded with copper sheets to directly clamp the outer circle of the blank, and a center frame is set up near the end of the outer circle, and the inner circle is turned into place in one cut; when fine turning the outer circle, the four jaws are padded with copper sheets to directly support the inner circle, and the outer circle is turned into place in one cut; when turning the inner and outer circles, the total length is processed to the preset value at the same time.

[0015] In order to better implement the present invention, further, in the rough milling stage in step E, a method of leaving process ribs is adopted to enhance rigidity, and the process ribs prevent the workpiece from expanding outward when clamped and stressed.

[0016] In order to better realize the present invention, further, in the fine milling stage in step G, every time the outer dimensions of a step window are processed in place, the assembled threaded bottom hole is also processed in place, and then the auxiliary support is removed, and clamping and auxiliary support are performed again when processing the next step window.

[0017] In order to better realize the present invention, further, auxiliary support components are used to auxiliary support the semi-finished product. The auxiliary support components include an inner support component and an outer support component. The inner support component supports the inner circular surface of the semi-finished product, and the outer support component supports the outer circular surface of the semi-finished product.

[0018] In order to better realize the present invention, further, the inner support assembly includes an inner support unit, and the inner support unit includes a support plate, a locking screw, and a locking nut. A plurality of locking screws are interspersed between the two support plates, and the locking nuts are threadedly connected to the locking screws. A plurality of locking nuts are distributed on both sides of the support plates. The support plates and the locking screws are relatively fixed by tightening the locking nuts, and a plurality of clamping blocks are arranged on the support plates.

[0019] In order to better realize the present invention, further, the outer support assembly includes an outer support unit, the four-axis device is provided with an outer support base, the outer support base includes a base, and a plurality of slide grooves arranged in a staggered manner in the horizontal and vertical directions are provided on the base; the outer support unit includes a plurality of support blocks installed on the base and directly below the cage-shaped workpiece and side support units distributed on both sides of the cage-shaped workpiece, the support blocks are used to support the cage-shaped workpiece and the support plate upward, the side support unit includes a screw, a long pressure plate, a first jack, and a second jack, a T-nut is installed on the screw, the T-nut is slidably connected to the long pressure plate, the screw is inserted into the long pressure plate, and the screw is threadedly connected to the pressing nut; the second jack is installed on the base, and the second jack is used to support the cage-shaped workpiece upward; a plurality of equal-height blocks are installed on the base, and the first jack is placed on the equal-height blocks, and the first jack is used to support the long pressure plate upward, and the long pressure plate presses the cage-shaped workpiece downward by using the lever principle.

[0020] In order to better realize the present invention, further, in the step D, a one-clamp-one-top clamping method is adopted on the four-axis equipment to clamp the semi-finished product, specifically: the cage-shaped workpiece is clamped by using the clamping assembly on the four-axis equipment, the clamping assembly includes a center, a hydraulic chuck, an inner disk, and a top holding plate, the hydraulic chuck is used to control the expansion and contraction of the inner disk to clamp the inner circular surface of the cage-shaped workpiece, the center pushes the top holding plate to limit the cage-shaped workpiece, this is a one-clamp-one-top clamping method.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] (1) The present invention processes the blank by using a segmented processing method from roughing to finishing and from turning to milling, thereby solving the problem of poor structural rigidity caused by the large number of weight-reducing openings and assembly windows in the cage-shaped workpiece. During the processing, after the processing allowance is gradually removed, the rigidity gradually weakens, causing difficulty in clamping during processing and easy deformation after processing, thereby improving the processing efficiency and quality of the cage-shaped workpiece.

[0023] (2) The present invention facilitates subsequent lifting and transportation operations by noting the weight of the semi-finished product before processing and the weight after the process is completed in each process;

[0024] (3) The present invention supports the internal structure of the cage-shaped workpiece by using auxiliary support components, and at the same time, adopts a lower support and upper pressure method at the non-processing crossbeam to improve the stability of the processing process, thereby further improving the processing efficiency and quality of the cage-shaped workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the process flow of the present invention.

[0026] Figure 2 A schematic diagram of the auxiliary support component structure.

[0027] Figure 3 This is a cross-sectional view of the auxiliary support component structure.

[0028] Figure 4 Schematic diagram of the external support assembly structure.

[0029] Figure 5 It is a schematic diagram of the structure of the external support component and the clamping component.

[0030] Figure 6 It is a schematic diagram of the structure of the inner support component and the clamping component.

[0031] Figure 7 Schematic diagram of the internal support assembly structure.

[0032] Figure 8 Schematic diagram of the processing status of a cage-shaped workpiece.

[0033] Fig. 9 Schematic diagram of the structural parameters of a cage-shaped workpiece.

[0034] Among them: 1-external support base; 2-external support unit; 3-inner support unit; 4-clamping assembly; 5-cage-shaped workpiece; 101-base; 102-slide; 201-first jack; 202-long pressure plate; 203-downward pressure nut; 204-equal height block; 205-T-nut; 206-screw; 207-support block; 208-second jack; 301-support plate; 302-clamping block; 303-locking screw; 304-locking nut; 401-top; 402-hydraulic chuck; 403-inner disk; 404-top holding plug. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Embodiment 1:

[0038] The present embodiment provides an overall mechanical processing method for a cage-shaped structural part, which processes the blank by a segmented processing method from rough to fine, from turning to milling. During the milling process, auxiliary support is provided for the inner and outer cylindrical surfaces of the blank, and each process is noted with the weight of the semi-finished product before processing and the weight after the completion of the process, which serves as a reference for hoisting and transfer.

[0039] Embodiment 2:

[0040] This embodiment further expands the processing steps based on the embodiment 1, specifically as follows Figure 1 As shown, the specific processing method includes the following steps:

[0041] A. Roughen the purchased steel pipe, remove the black skin on the surface, and then perform heat treatment to improve the rigidity of the material; the weight of the forging is 1150.9kg;

[0042] B. Use the four-claw fixture on the CNC horizontal lathe to clamp the blank;

[0043] C. Rough turning and fine turning are performed on the blank material in sequence, so that the inner circle, outer circle and total length dimensions reach the predetermined values, and the semi-finished product is obtained; the weight of the inner and outer circles and the end surface after rough turning is 1031.9 kg, and the weight after fine turning is 897.7 kg;

[0044] D. Use one clamp and one top clamping method to clamp the semi-finished product on the four-axis equipment;

[0045] E. Rough milling is performed on the circumferential wall of the semi-finished product to produce step windows and weight-reducing grooves; the weight after rough milling is 396.1 kg;

[0046] F. Provide auxiliary support for the inner and outer surfaces of the semi-finished products after rough milling;

[0047] G. Perform semi-finished milling and fine milling on the supported semi-finished product to obtain a finished product; the weight after semi-finishing milling is 235.1 kg; the weight of the finished product obtained by fine milling is 176.7 kg.

[0048] In this embodiment, the model material of the cage-shaped workpiece 5 is 45-WJS (RZ) 114-2007, and the shape of the cage-shaped workpiece 5 is similar to a cage. , inner diameter , total length 1320, 6 locations Weight reduction slots, 6 locations , Assembly step window, window angle and tolerance , a total of 120-M8×1 threaded holes on the step window, the hole position tolerance is controlled at ±0.1, 4-M12 threaded holes on the outer circle; multiple M10 and 4-M20 threaded holes on both end faces, the center distance , angles and tolerances , such as Fig. 9 As shown, its processing status is as follows Figure 8 shown.

[0049] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0050] Embodiment 3:

[0051] This embodiment is further expanded on the basis of embodiment 2. In the rough turning stage of step C, both the inner and outer circles are cut, the four jaws directly clamp the outer circle, and the inner and outer circles are processed according to the size in combination with the center frame on the CNC horizontal lathe equipment;

[0052] In the fine turning stage of step C, when fine turning the inner circle, the four jaws are padded with copper sheets to directly clamp the outer circle of the blank, and a center frame is set up near the end of the outer circle, and the inner circle is turned into place in one cut; when fine turning the outer circle, the four jaws are padded with copper sheets to directly support the inner circle, and the outer circle is turned into place in one cut; when turning the inner and outer circles, the dimensions are processed simultaneously to meet the total length requirements.

[0053] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0054] Embodiment 4:

[0055] This embodiment is further expanded on the basis of embodiment 2. In the rough milling stage in step E, most of the margin is removed, the cutting amount is large, the cutting speed is fast, and the method of leaving process ribs is adopted to enhance the rigidity. The process ribs prevent the workpiece from expanding outward when clamped under stress. During roughing, according to the structural characteristics and empirical methods, a 10mm margin is left on one side in the rotation direction of the weight-reducing groove, a 20mm margin is left on one side in the rotation direction of the step window, and the same 20mm margin is left on one side in the longitudinal direction of the two parts. At the same time, the rib thickness is 20mm. Through model calculation, the weight before roughing is 897.7kg, and the weight after roughing is 396.1kg. This stage reduces the weight by 55.9%. Straight reinforcement ribs can reduce the tool feeding time.

[0056] Semi-finishing stage: Lightening slots After the processing is completed, the assembly step window is finely milled with a 5mm margin on one side. The weight before semi-fine milling is 396.1kg, and the weight after processing is 238.8kg. This stage reduces the weight by 40.7% again.

[0057] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0058] Embodiment 5:

[0059] This embodiment is further expanded on the basis of Embodiment 2. In the fine milling stage in step G, every time the outer dimensions of a step window are processed in place, the assembled threaded bottom hole is also processed in place, and then the auxiliary support is removed. When processing the next step window, clamping and auxiliary support are performed again, thereby reducing the clamping time and the number of clamping times and improving the processing efficiency.

[0060] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0061] Embodiment 6:

[0062] This embodiment is further expanded on the basis of the above embodiment. Figure 2-Figure 3 As shown, an auxiliary support component is used to auxiliary support the semi-finished product. The auxiliary support component includes an inner support component and an outer support component. The inner support component supports the inner circular surface of the semi-finished product, and the outer support component supports the outer circular surface of the semi-finished product.

[0063] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0064] Embodiment 7:

[0065] This embodiment further expands the inner support assembly based on the embodiment 6. Figure 6 , Figure 7 As shown, the inner support assembly includes an inner support unit 3, and the inner support unit 3 includes a support plate 301, a locking screw 303, and a locking nut 304. A plurality of locking screws 303 are interspersed between the two support plates 301, and the locking nut 304 is threadedly connected to the locking screw 303. A plurality of locking nuts 304 are distributed on both sides of the support plate 301. The support plate 301 and the locking screw 303 are relatively fixed by tightening the locking nut 304, and a plurality of clamping blocks 302 are arranged on the support plate 301.

[0066] The clamping position is replaced by a clamping block 302 welded at four points to meet the clamping conditions of the CNC horizontal lathe without changing the support thickness. The middle through hole part reduces the deformation effect of the tooling weight on the workpiece, which is a weight reduction treatment for the support plate 301. At the same time, the outer circle can be processed in place at one time to ensure the roundness of the mating surface.

[0067] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0068] Embodiment 8:

[0069] This embodiment further expands the external support assembly based on Embodiment 7. Figure 3-5As shown, the outer support assembly includes an outer support unit 2, and the four-axis device is provided with an outer support base 1, and the outer support base 1 includes a base 101, and the base 101 is provided with a plurality of slide grooves 102 arranged in a transverse and longitudinal staggered manner; the outer support unit 2 includes a plurality of support blocks 207 installed on the base 101 and directly below the cage-shaped workpiece 5, and side support units distributed on both sides of the cage-shaped workpiece 5, the support block 207 is used to support the cage-shaped workpiece 5 and the support plate 301 upward, and the side support unit includes a screw 206, a long pressure plate 202, a first jack 201, and a second The jack 208 and the screw rod 206 are provided with a T-nut 205, the T-nut 205 is slidably connected to the long pressure plate 202, the screw rod 206 is inserted into the long pressure plate 202, and the screw rod 206 is threadedly connected to the pressing nut 203; the second jack 208 is installed on the base 101, and the second jack 208 is used to support the cage-shaped workpiece 5 upward; a plurality of equal-height blocks 204 are installed on the base 101, and the first jack 201 is placed on the equal-height blocks 204, and the first jack 201 is used to support the long pressure plate 202 upward, so that the long pressure plate 202 presses the cage-shaped workpiece 5 downward.

[0070] After the inner support unit 3 is placed in the cage-shaped workpiece 5 and clamped, a plurality of support blocks 207 are placed on the base 101, some of the support blocks 207 are used to support the cage-shaped workpiece 5, and the other part of the cage-shaped workpiece 5 is used to support the support plate 301; at the same time, a plurality of second jacks 208 are placed to support the lateral bottom of the cage-shaped workpiece 5; through the joint action of the second jacks 208 and the support blocks 207, the cage-shaped workpiece 5 will not move radially along the lower half of both sides; then the first jack 201 is placed horizontally on the lateral upper part of the cage-shaped workpiece 5 and the first jack 201, and the first jack 201 is supported by an appropriate amount of equal height blocks 204; then the pressing nut 203 is tightened, at this time, because the T-nut 205 will be limited by the slide groove 102, the long pressure plate 202 will firmly press the cage-shaped workpiece 5, so that the cage-shaped workpiece 5 will not move radially along the upper half of both sides. That is, the outer support assembly and the clamping cooperation of the four-axis equipment are utilized to achieve complete positioning and support of the cage-shaped workpiece 5 .

[0071] Embodiment 9:

[0072] This embodiment is further expanded on the basis of the support unit 2 outside the embodiment, specifically, the cage-shaped workpiece 5, Figure 6As shown, in the step D, a one-clamp-one-top clamping method is used to clamp the semi-finished product on the four-axis equipment. Specifically, the cage-shaped workpiece 5 is clamped by using the clamping assembly 4 on the four-axis equipment. The clamping assembly 4 includes a top 401, a hydraulic chuck 402, an inner disk 403, and a top holding plate 404. The hydraulic chuck 402 is used to control the expansion and contraction of the inner disk 403 to clamp the inner circular surface of the cage-shaped workpiece 5. The top 401 pushes the top holding plate 404 to limit the cage-shaped workpiece 5. This is a one-clamp-one-top clamping method.

[0073] The coaxiality of the assembly stopper of the top holding plug 404 and the top hole 401 is required to be within 0.05mm. It contains a weight-reducing hole design, which reduces weight and facilitates lifting, and is convenient for the operator to assemble and operate; the arc surface of the inner disk 403 increases the contact area with the inner hole of the cage-shaped workpiece 5, thereby improving stability; the claws on the hydraulic chuck 402 are welded to the inner disk 403, and the contraction and expansion clamping are achieved by adjusting the claws, and the gap of the inner disk 403 is the adjustment range; in order to ensure the roundness of the outer circles of multiple inner disks 403, the completed inner disk 403 is pre-turned, divided into three petals by CNC milling, and welded to the claws of the hydraulic chuck 402, and then the inner disk 403 is hoisted as a whole onto the CNC lathe equipment for final fine turning, which puts forward higher shape and position requirements for the verticality of the stop end face and the outer circle of the stop, thereby reducing the positioning error of the tooling on the workpiece.

[0074] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0075] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for integrally machining a cage-shaped structural member, characterized in that: The blank is processed by a segmented processing method from rough to fine, from turning to milling. During milling, the inner and outer surfaces of the blank are supported auxiliaryly. The weight of the semi-finished product before processing and the weight after the process are noted in each process, which is a certain reference for hoisting and transfer. The specific processing method includes the following steps: A. Heat treatment is performed on the purchased blanks after roughing to improve the rigidity of the materials; B. Use the four-claw fixture on the CNC horizontal lathe to clamp the blank; C. Rough turning and fine turning are performed on the blank material in sequence, so that the inner circle, outer circle and total length dimensions reach the predetermined values, and the semi-finished product is obtained; D. Use one clamp and one top clamping method to clamp the semi-finished product on the four-axis equipment; E. Rough milling is performed on the circumferential wall of the semi-finished product to produce step windows and weight-reducing grooves; F. Provide auxiliary support for the inner and outer surfaces of the semi-finished products after rough milling; G. Perform semi-finishing milling and finishing milling on the supported semi-finished product to obtain the finished product; Using auxiliary support components to assist in supporting the semi-finished product, the auxiliary support components include an inner support component and an outer support component, the inner support component supports the inner cylindrical surface of the semi-finished product, and the outer support component supports the outer cylindrical surface of the semi-finished product; The inner support assembly comprises an inner support unit (3), the inner support unit (3) comprising a support plate (301), a locking screw (303), and a locking nut (304); a plurality of locking screws (303) are interspersed between the two support plates (301); the locking nuts (304) are threadedly connected to the locking screws (303); the plurality of locking nuts (304) are distributed on both sides of the support plate (301); the support plate (301) and the locking screw (303) are relatively fixed by tightening the locking nuts (304); and a plurality of clamping blocks (302) are arranged on the support plate (301); The external support assembly comprises an external support unit (2); the four-axis device is provided with an external support base (1); the external support base (1) comprises a base (101); the base (101) is provided with a plurality of slide grooves (102) arranged in a transverse and longitudinal staggered manner; the external support unit (2) comprises a plurality of support blocks (207) mounted on the base (101) and located directly below the cage-shaped workpiece (5); and side support units distributed on both sides of the cage-shaped workpiece (5); the support blocks (207) are used to support the cage-shaped workpiece (5) and the support plate (301) upward; the side support units comprise a screw rod (206), a long pressure plate (202), a first jack (201), a second jack (202), and a plurality of support blocks (207) arranged on the base (101). 08), a T-nut (205) is installed on the screw rod (206), the T-nut (205) is slidably connected to the long pressure plate (202), the screw rod (206) is inserted into the long pressure plate (202), and the screw rod (206) is threadedly connected to the downward pressing nut (203); the second jack (208) is installed on the base (101), and the second jack (208) is used to support the cage-shaped workpiece (5) upward; a plurality of equal-height blocks (204) are installed on the base (101), and a first jack (201) is placed on the equal-height blocks (204), and the first jack (201) is used to support the long pressure plate (202) upward, so that the long pressure plate (202) presses the cage-shaped workpiece (5) downward.

2. A method for integrally machining a cage-shaped structural component according to claim 1, characterized in that: In the rough turning stage of step C, both the inner and outer circles are cut, the four jaws directly clamp the outer circle, and the inner and outer circles are processed according to the size in combination with the center frame on the CNC horizontal lathe equipment; In the fine turning stage of step C, when fine turning the inner circle, the four jaws are padded with copper sheets to directly clamp the outer circle of the blank, and a center frame is set up near the end of the outer circle, and the inner circle is turned into place in one cut; when fine turning the outer circle, the four jaws are padded with copper sheets to directly support the inner circle, and the outer circle is turned into place in one cut; when turning the inner and outer circles, the total length is processed to the preset value at the same time.

3. The method for integrally machining a cage-shaped structural component according to claim 1, characterized in that: In the rough milling stage in step E, a method of leaving process ribs is adopted to enhance rigidity, and the process ribs prevent the workpiece from expanding outward when clamped and stressed.

4. A method for integrally machining a cage-shaped structural component according to claim 1, characterized in that: In the fine milling stage in step G, each time the outer dimensions of a step window are processed in place, the assembled threaded bottom hole is also processed in place, and then the auxiliary support is disassembled, and clamping and auxiliary support are performed again when processing the next step window.

5. A method for integrally machining a cage-shaped structural member according to any one of claims 1 to 4, characterized in that: In the step D, the semi-finished product is clamped on the four-axis device by a one-clamp-one-top clamping method, specifically: the cage-shaped workpiece (5) is clamped by using a clamping assembly (4) on the four-axis device, the clamping assembly (4) includes a top (401), a hydraulic chuck (402), an inner disk (403), and a top holding plate (404), the hydraulic chuck (402) is used to control the expansion and contraction of the inner disk (403) to clamp the inner circular surface of the cage-shaped workpiece (5), the top (401) pushes the top holding plate (404) to limit the cage-shaped workpiece (5), this is a one-clamp-one-top clamping method.

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