A lathe fixture for welding assembly of air intake force frame

Abstract

A kind of lathe processing fixture for air intake force frame welding assembly, including chassis, support positioning structure is provided on the top surface of chassis for supporting and positioning the shell of air intake force frame welding assembly;Plate is provided on the chassis for pressing the outer edge plate of the bottom of the shell of air intake force frame welding assembly;Fixedly set with guide cylinder at the center of the top surface of chassis, support cylinder is arranged in the inside of guide cylinder;Spacing is provided with compression ring assembly above guide cylinder, a plurality of hexagonal bolts are uniformly distributed on the top of the compression ring assembly, the lower end of hexagonal bolt extends downward and is threadedly connected with the top edge plate of guide cylinder;It further includes driving device for driving the lifting movement of the support cylinder in the guide cylinder.In the lathe processing process of air intake force frame welding assembly, support cylinder can be moved up and down according to specific situation, the support height of support cylinder is adjusted, it is convenient to operate, it is favorable to improve processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of aero-engine manufacturing technology, and in particular to a machining fixture for welding components of an intake load-bearing frame. Background Technology

[0002] Combination Figure 1 , Figure 2 The diagram shows a structural schematic of the intake support frame welding assembly, which includes a housing 100 and 17 support plates 101 welded inside the housing 100. The machining process of the intake support frame welding assembly includes the following steps:

[0003] Using the bottom surface A of the housing 100 as the supporting surface, and the outer circle of the bottom of the housing 100 as the supporting surface... Using D1 as a positioning reference, the top surface B of the inner end of the support plate 101, the table surface C of the top of the housing 100, and the circle formed by turning the top surfaces B of the inner ends of multiple support plates 101 are machined. D2, and the stepped circle at position C on the top of the shell 100. D3.

[0004] During machining, welding factors caused the bottom surfaces D of the inner ends of each support plate 101 to be on different planes, resulting in support difficulties. Summary of the Invention

[0005] The main objective of this invention is to provide a machining fixture for welding components of an air intake load-bearing frame, thereby addressing the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention proposes a machining fixture for a welding assembly of an intake load-bearing frame, comprising a chassis, a support and positioning structure on the top surface of the chassis for supporting and positioning the housing of the intake load-bearing frame welding assembly; a pressure plate on the chassis for pressing the outer edge plate at the bottom of the housing of the intake load-bearing frame welding assembly; a guide cylinder fixedly disposed at the center of the top surface of the chassis, and a support cylinder disposed inside the guide cylinder; pressure ring assemblies spaced above the guide cylinder, with multiple hexagonal bolts evenly distributed circumferentially on the top of the pressure ring assemblies, the lower ends of the hexagonal bolts extending downward and threadedly connected to the top edge plate of the guide cylinder; and a driving device for driving the support cylinder to move up and down inside the guide cylinder.

[0007] Preferably, the support and positioning structure includes multiple positioning blocks, each in an arc shape, with its top surface serving as a support surface. An arc-shaped boss is provided on the top surface of each positioning block. The multiple positioning blocks are arranged in a ring, and the inner surfaces of each arc-shaped boss are on the same cylindrical surface. The diameter of the inner surface of each arc-shaped boss is equal to the outer diameter of the bottom edge plate of the intake support frame welded assembly. D1 is equal; the supporting surfaces of each positioning block are coplanar, and the parallelism of each supporting surface relative to the bottom surface of the chassis is no greater than 0.02.

[0008] Preferably, the driving device includes a threaded sleeve, a screw, and a wrench assembly; a flange is provided at the middle of the outer cylindrical surface of the threaded sleeve, which is fixed to the chassis by a pin and screw, and the lower end of the threaded sleeve is inserted into the central hole of the chassis; an annular body is provided at the upper part of the screw; a countersunk hole is provided at the center of the support cylinder; the threaded section at the lower end of the screw passes through the countersunk hole and mates with the internal threaded hole of the threaded sleeve; the annular body is rotatably mounted in the countersunk platform of the countersunk hole; a cover plate is provided on the top surface of the support cylinder and covers the annular body; a wrench connecting section is provided at the top of the annular body; the wrench connecting section extends from the central inner hole of the cover plate, and a hexagonal hole is provided in the wrench connecting section for connection with the wrench assembly.

[0009] Preferably, the wrench assembly includes a hexagonal head, a steel pipe, and a movable handle; the movable handle is inserted laterally into the top end of the steel pipe; the upper end of the hexagonal head is inserted into the lower end of the steel pipe and then welded and fixed; the lower end of the hexagonal head is configured as a hexagonal body for insertion into the hexagonal hole at the top of the screw.

[0010] Preferably, a plurality of first grease grooves are evenly distributed in a ring on the countersunk plate of the support cylinder; a plurality of second grease grooves are evenly distributed in a ring on the lower surface of the cover plate; and the first grease grooves and the second grease grooves are filled with grease.

[0011] Preferably, a set screw is provided on the cover plate; an annular groove is provided on the top surface of the annular body of the screw; the lower end of the set screw extends into the annular groove and can be used to tighten the screw.

[0012] Preferably, a cylindrical pin is inserted laterally into the side of the support cylinder; a vertical waist-shaped hole is provided on the cylindrical surface of the guide cylinder; the cylindrical pin is inserted into the waist-shaped hole, and the outer cylindrical surface of the cylindrical pin slides in fit with the waist-shaped hole.

[0013] Preferably, an annular support platform is provided on the top surface of the support cylinder, and the top surface of the annular support platform is used to support the bottom surface D of the inner end of the support plate of the air intake load-bearing frame welding assembly; a finger gauge device is provided inside the support cylinder to indicate whether the top surface of the annular support platform is in contact with the bottom surface D of the inner end of the support plate.

[0014] Preferably, the finger gauge device includes a lever, a cylindrical stepped head, a guide cylinder, a seat, and a measuring head; the seat is fixedly connected to the top wall of the inner cavity of the support cylinder, and the lever is rotatably mounted on the seat via a pin; the guide cylinder is inserted into the support cylinder; the cylindrical stepped head is slidably mounted inside the guide cylinder; a first spring is sleeved on the cylindrical surface of the cylindrical stepped head, the upper end of the first spring abuts against the top wall of the inner cavity of the guide cylinder, and the lower end abuts against the annular platform of the cylindrical stepped head; the first spring is in a compressed and energy-storing state to generate a downward force on the cylindrical stepped head; a square hole is provided on the side wall of the support cylinder, and a vertical hole is provided on the annular support platform communicating with the square hole; the measuring head is installed in the square hole, and the upper end of the measuring head is perpendicular to the vertical... The measuring head has a sliding fit with the hole, and its upper end can extend out of the top surface of the annular support platform. An upper retaining ring and a lower retaining ring are arranged at intervals in the middle of the measuring head. One end of the lever is U-shaped and is inserted into the gap between the upper and lower retaining rings. The top surface of the other end of the lever contacts the lower end of the cylindrical stepped head. A second spring is sleeved on the lower part of the measuring head. The upper end of the second spring abuts against the bottom surface of the lower retaining ring, and the lower end abuts against the bottom wall of the square hole. The second spring is in a compressed and energy-storing state to generate an upward force on the measuring head. When the measuring head moves downward to the point where its top end is flush with the top surface of the annular support platform, it drives the lever to rotate and pushes the cylindrical stepped head upward, so that the top surface of the cylindrical stepped head is higher than the top surface of the guide tube, forming a height difference.

[0015] Preferably, the pressure ring assembly includes a first ring body and a second ring body attached to the lower surface of the first ring body; the second ring body is made of fabric-reinforced phenolic resin; the pressure ring assembly is used to press the top of each support plate of the intake bearing frame welding assembly at the position towards the inner end of the middle.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0017] (1) In this invention, the housing of the intake load-bearing frame welding assembly is supported and positioned by the support and positioning structure on the top surface of the chassis. Simultaneously, a pressure plate is used to press the outer edge plate at the bottom of the housing of the intake load-bearing frame welding assembly. A drive device drives the support cylinder to move up and down inside the guide cylinder. By adjusting the height of the support cylinder and supporting it on the bottom surface D of the inner end of each support plate of the intake load-bearing frame welding assembly, and then pressing the top of each support plate towards the inner end using a pressure ring assembly, and tightening the hexagonal bolts on the pressure ring assembly, the positioning, pressing, and fixing of the entire intake load-bearing frame welding assembly can be completed. During the machining process of the intake load-bearing frame welding assembly, the support cylinder can be moved up and down according to specific circumstances to adjust its support height, making operation convenient and improving machining efficiency.

[0018] (2) In this invention, a finger gauge device is set to indicate whether the top surface of the annular support platform is in contact with the bottom surface D of the inner end of the support plate. When the bottom surface D of the inner end of the support plate of the air intake bearing frame welding assembly abuts against the top surface of the annular support platform of the support cylinder, it abuts against the top surface of the measuring head at the same time, so that the measuring head moves downward until its top end is flush with the top surface of the annular support platform, thereby driving the lever to rotate and push the cylindrical step head upward, so that the top surface of the cylindrical step head is higher than the top surface of the guide cylinder to form a height difference, which indicates that the support cylinder and the bottom surface D of the inner end of the support plate have been in contact. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the welded assembly of the air intake load-bearing frame;

[0021] Figure 2 This is a cross-sectional view of the welded assembly of the air intake support frame;

[0022] Figure 3 This is a three-dimensional structural diagram of the machining fixture provided by the present invention;

[0023] Figure 4 This is a cross-sectional view of the machining fixture provided by the present invention;

[0024] Figure 5 This is a cross-sectional view of the finger gauge device in the machining fixture provided by the present invention;

[0025] Figure 6 This is an exploded view of the structure of the finger gauge device in the machining fixture provided by the present invention.

[0026] Figure 7 This is a three-dimensional structural diagram of the positioning block in the machining fixture provided by the present invention;

[0027] Figure 8 This is a three-dimensional structural diagram of the guide cylinder in the machining fixture provided by the present invention;

[0028] Figure 9 A three-dimensional structural diagram of the support cylinder in the machining fixture provided by the present invention. Figure 1 ;

[0029] Figure 10 A three-dimensional structural diagram of the support cylinder in the machining fixture provided by the present invention. Figure 2 ;

[0030] Figure 11 This is a cross-sectional view and a three-dimensional structural diagram of the screw in the machining fixture provided by the present invention;

[0031] Figure 12 This is a cross-sectional view of the threaded sleeve in the machining fixture provided by the present invention;

[0032] Figure 13 This is a top view of the threaded sleeve in the machining fixture provided by the present invention;

[0033] Figure 14 This is a front sectional view of the cover plate in the machining fixture provided by the present invention;

[0034] Figure 15 This is a bottom view of the cover plate in the machining fixture provided by the present invention;

[0035] Figure 16 This is a schematic diagram of the wrench assembly in the machining fixture provided by the present invention;

[0036] Figure 17 This is a schematic diagram showing the machining fixture provided by the present invention after clamping the air intake load-bearing frame welding assembly.

[0037] Reference numerals: 1. Chassis; 2. Positioning block; 2a. Arc-shaped boss; 2b. Support surface; 3. Pressure plate; 4. Guide cylinder; 4a. Oblong hole; 5. Support cylinder; 5a. Countersunk hole; 5b. First grease groove; 5c. Annular support platform; 5d. Square hole; 5e. Vertical hole; 6. Threaded sleeve; 7. Screw; 7a. Ring-shaped body; 7b. Wrench connecting section; 7c. Hexagonal hole; 7d. Annular groove; 8. Cover plate; 8a. Second grease groove; 9. Measuring head; 9a. Upper clamp. 9b. Lower retaining ring; 9c. Second spring; 10. Lever; 11. Cylindrical stepped head; 12. Guide tube; 12a. First spring; 13. Seat; 13a. Pin; 14. Pressure ring assembly; 14a. First ring body; 14b. Second ring body; 15. Wrench assembly; 15a. Hexagonal head; 15b. Steel pipe; 15c. Moving handle; 16. Hex bolt; 17. Set screw; 18. Cylindrical pin; 19. Eye bolt; 100. Housing; 101. Support plate. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0040] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0041] Combination Figure 1 , Figure 2 The diagram shows a structural schematic of the intake support frame welding assembly, which includes a housing 100 and 17 support plates 101 welded inside the housing 100. During machining, the bottom surface A of the housing 100 is used as the support surface, and the outer circumference of the bottom of the housing 100 is used as the support surface. Using D1 as a positioning reference, the top surface B of the inner end of the support plate 101, the table surface C of the top of the housing 100, and the circle formed by turning the top surfaces B of the inner ends of multiple support plates 101 are machined. D2, and the stepped circle at position C on the top of the shell 100. D3.

[0042] Combination Figures 3 to 16 As shown, a machining fixture for welding an intake support frame assembly includes a chassis 1. A support and positioning structure is provided on the top surface of the chassis 1 to support and position the housing 100 of the intake support frame welding assembly. A pressure plate 3 is provided on the chassis 1 to press the outer edge plate at the bottom of the housing 100 of the intake support frame welding assembly. A guide cylinder 4 is fixedly provided at the center of the top surface of the chassis 1, and a support cylinder 5 is provided inside the guide cylinder 4. A pressure ring assembly 14 is provided at intervals above the guide cylinder 4. A plurality of hexagonal bolts 16 are evenly distributed around the top of the pressure ring assembly 14, and the lower ends of the hexagonal bolts 16 extend downward and are threadedly connected to the top edge plate of the guide cylinder 4. The fixture also includes a driving device for driving the support cylinder 5 to move up and down inside the guide cylinder 4.

[0043] When machining the intake frame welded assembly, the chassis 1 is fixedly mounted on the CNC vertical lathe faceplate. The support and positioning structure on the top surface of the chassis 1 supports and positions the housing 100 of the intake frame welded assembly. Simultaneously, the pressure plate 3 presses the outer edge plate at the bottom of the housing 100. The drive device drives the support cylinder 5 to move up and down inside the guide cylinder 4. By adjusting the height of the support cylinder 5 and supporting it on the bottom surface D of the inner ends of each support plate 101 of the intake frame welded assembly, and then pressing it against the top of each support plate 101 at the center towards the inner end using the pressure ring assembly 14, and finally tightening the hexagonal bolts 16 on the pressure ring assembly 14, the entire intake frame welded assembly is positioned, pressed, and fixed. During the machining process of the intake frame welded assembly, the support cylinder 5 can be moved up and down as needed to adjust its support height, making operation convenient and improving machining efficiency.

[0044] Combination Figure 3 and Figure 7 As shown, the support and positioning structure includes multiple positioning blocks 2, each in an arc shape. The top surface of each positioning block 2 is a support surface 2b, and an arc-shaped boss 2a is provided on the top surface of the positioning block 2. The multiple positioning blocks 2 are arranged in a ring, and the inner surfaces of each arc-shaped boss 2a are on the same cylindrical surface. The diameter of the inner surface of each arc-shaped boss 2a is the same as the outer diameter of the bottom edge plate of the housing 100 of the intake load-bearing frame welding assembly. D1 is equal; the support surfaces 2b of each positioning block 2 are coplanar, and the parallelism of each support surface 2b relative to the bottom surface of the chassis 1 is not greater than 0.02. When clamping the intake load-bearing frame welding assembly, the bottom surface A of the housing 100 is supported on the support surfaces 2b of each positioning block 2, and the outer circle of the bottom of the housing 100 is... D1 abuts against the inner arc surface of the arc-shaped boss 2a of each segment positioning block 2, forming a support and positioning for the housing 100.

[0045] In this embodiment, the positioning block 2 is positioned and mounted on the chassis 1 by screws and pins.

[0046] Combination Figure 8 As shown, an inner edge plate is provided at the bottom of the inner hole of the guide cylinder 4. The inner edge plate is installed on the chassis 1 by means of screws and pins.

[0047] Combination Figure 3 As shown, four eye bolts 19 are evenly distributed on the chassis 1 to facilitate the lifting of the entire vehicle machining fixture.

[0048] Combination Figure 4 , Figures 9 to 15As shown, the driving device includes a threaded sleeve 6, a screw 7, and a wrench assembly 15. A flange is provided at the center of the outer cylindrical surface of the threaded sleeve 6, which is fixed to the base 1 by pins and screws, and the lower end of the threaded sleeve 6 is inserted into the central hole of the base 1. An annular body 7a is provided on the upper part of the screw 7. A countersunk hole 5a is provided at the center of the support cylinder 5. The threaded section at the lower end of the screw 7 passes through the countersunk hole 5a and engages with the internal threaded hole of the threaded sleeve 6. The annular body 7a is rotatably mounted within the countersunk hole 5a. A cover plate 8 is provided on the top surface of the support cylinder 5 and covers the annular body 7a. The cover plate 8 is fixed to the support cylinder 5 by screws and pins. A wrench connecting section 7b is provided on the top of the annular body 7a. The wrench connecting section 7b extends from the central inner hole of the cover plate 8, and a hexagonal hole 7c is provided in the wrench connecting section 7b for connection with the wrench assembly 15.

[0049] Combination Figure 4 As shown, the lifting and lowering adjustment principle of the support cylinder 5 is as follows: by rotating the wrench assembly 15, the screw 7 is driven to rotate. Since the threaded sleeve 6 is fixed on the chassis 1, the screw 7 rotates around its own axis and moves up and down along its axis under the action of the threaded engagement. Since the annular body 7a is rotatably installed in the countersunk hole 5a, under the limiting action of the cover plate 8 and the countersunk hole 5a, the screw 7 can drive the support cylinder 5 to move up and down at the same time as it moves up and down.

[0050] Combination Figure 16 As shown, the wrench assembly 15 includes a hexagonal head 15a, a steel pipe 15b, and a movable handle 15c. The movable handle 15c is horizontally inserted into the top of the steel pipe 15b. The upper end of the hexagonal head 15a is inserted into the lower end of the steel pipe 15b and then welded and fixed. The lower end of the hexagonal head 15a is configured as a hexagon for insertion into the hexagonal hole 7c at the top of the screw 7. When it is necessary to adjust the height of the support cylinder 5, the hexagonal head 15a of the wrench assembly 15 is inserted into the hexagonal hole 7c at the top of the screw 7 to rotate the screw 7. When no adjustment is needed, the entire wrench assembly 15 can be removed to avoid interference during machining.

[0051] Combination Figure 9 , Figure 15 As shown, a plurality of first grease grooves 5b are evenly distributed in a ring on the countersunk hole 5a of the support cylinder 5; a plurality of second grease grooves 8a are evenly distributed in a ring on the lower surface of the cover plate 8; the first grease grooves 5b and the second grease grooves 8a are filled with grease to lubricate the annular body 7a of the screw 7.

[0052] Combination Figure 4As shown, a set screw 17 is provided on the cover plate 8; an annular groove 7d is provided on the top surface of the annular body 7a of the screw 7; the lower end of the set screw 17 extends into the annular groove 7d and can be used to tighten the annular body 7a of the screw 7. When the height of the support cylinder 5 is adjusted to the correct position, in order to prevent the screw 7 from rotating relative to the support cylinder 5, the annular body 7a of the screw 7 is tightened by tightening the set screw 17.

[0053] Combination Figure 4 , Figure 8 As shown, in this embodiment, when the support cylinder 5 is adjusted for lifting, in order to prevent the support cylinder 5 from rotating with the screw 7 and to prevent the support cylinder 5 from rotating around its own axis (the support cylinder 5 can only move up and down and cannot rotate around itself), a cylindrical pin 18 is inserted laterally on the side of the support cylinder 5; a vertical waist-shaped hole 4a is provided on the cylindrical surface of the guide cylinder 4; the cylindrical pin 18 is inserted into the waist-shaped hole 4a, and the outer cylindrical surface of the cylindrical pin 18 slides in fit with the waist-shaped hole 4a.

[0054] Combination Figure 4 , Figure 9 As shown, an annular support platform 5c is provided on the top surface of the support cylinder 5. The top surface of the annular support platform 5c is used to support the bottom surface D of the inner end of the support plate 101 of the air intake load-bearing frame welding assembly. A finger gauge device is provided inside the support cylinder 5 to indicate whether the top surface of the annular support platform 5c is in contact with the bottom surface D of the inner end of the support plate 101. The parallelism between the top surface of the annular support platform 5c and the bottom surface of the chassis 1 is not greater than 0.1.

[0055] Combination Figure 5 , Figure 6As shown, the finger gauge device includes a lever 10, a cylindrical stepped head 11, a guide cylinder 12, a seat 13, and a measuring head 9. The seat 13 is fixedly connected to the top wall of the inner cavity of the support cylinder 5, and the lever 10 is rotatably mounted on the seat 13 via a pin 13a. The guide cylinder 12 is inserted into the support cylinder 5. The cylindrical stepped head 11 is slidably mounted inside the guide cylinder 12. A first spring 12a is sleeved on the cylindrical surface of the cylindrical stepped head 11. The upper end of the first spring 12a abuts against the top wall of the inner cavity of the guide cylinder 12, and the lower end abuts against the annular platform of the cylindrical stepped head 11. The first spring 12a is in a compressed and energy-storing state to generate a downward force on the cylindrical stepped head 11. A square hole 5d is provided on the side wall of the support cylinder 5, and a vertical hole 5e is provided on the annular support platform 5c to connect to the square hole 5d. The measuring head 9 is installed in the square hole 5d, and the measuring head... The upper end of the measuring head 9 slides into the vertical hole 5e, and the upper end of the measuring head 9 can extend out of the top surface of the annular support platform 5c; an upper retaining ring 9a and a lower retaining ring 9b are arranged at intervals in the middle of the measuring head 9; one end of the lever 10 is U-shaped and is inserted into the gap between the upper retaining ring 9a and the lower retaining ring 9b; the top surface of the other end of the lever 10 contacts the lower end of the cylindrical stepped head 11; a second spring 9c is sleeved on the lower part of the measuring head 9, the upper end of the second spring 9c abuts against the bottom surface of the lower retaining ring 9b, and the lower end abuts against the bottom wall of the square hole 5d. The second spring 9c is in a compressed and energy-storing state to generate an upward force on the measuring head 9; when the measuring head 9 moves downward to the top surface of its top end being flush with the top surface of the annular support platform 5c, it drives the lever 10 to rotate and push the cylindrical stepped head 11 upward, so that the top surface of the cylindrical stepped head 11 is higher than the top surface of the guide cylinder 12, forming a height difference. In this embodiment, the distance from the axis of the cylindrical stepped head 11 to the pin 13a is 45±0.2mm; the distance from the axis of the measuring head 9 to the pin 13a is 15±0.2mm. The distance the measuring head 9 moves up and down is magnified by the amplification principle of the lever 10.

[0056] Combination Figure 4 , Figure 5 As shown, the pressure ring assembly 14 includes a first ring body 14a and a second ring body 14b attached to the lower surface of the first ring body 14a; the second ring body 14b is made of fabric-reinforced phenolic resin to avoid damaging the parts; the pressure ring assembly 14 is used to press the top of each support plate 101 of the intake bearing frame welding assembly at the position biased towards the inner end in the middle.

[0057] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A machining fixture for welding components of an air intake load-bearing frame, characterized in that, The system includes a chassis (1), on the top surface of which a support and positioning structure is provided for supporting and positioning the housing (100) of the intake load-bearing frame welding assembly; a pressure plate (3) is provided on the chassis (1) for pressing the outer edge plate at the bottom of the housing (100) of the intake load-bearing frame welding assembly; a guide cylinder (4) is fixedly provided at the center of the top surface of the chassis (1), and a support cylinder (5) is provided inside the guide cylinder (4); a pressure ring assembly (14) is provided at intervals above the guide cylinder (4), and multiple hexagonal bolts (16) are evenly distributed around the top of the pressure ring assembly (14), with the lower end of the hexagonal bolts (16) extending downward and threadedly connected to the top edge plate of the guide cylinder (4); and a driving device is also included for driving the support cylinder (5) to move up and down inside the guide cylinder (4). A ring-shaped support platform (5c) is provided on the top surface of the support cylinder (5). The top surface of the ring-shaped support platform (5c) is used to support the bottom surface D of the inner end of the support plate (101) of the air intake load-bearing frame welding assembly. A finger gauge device is provided inside the support cylinder (5) to indicate whether the top surface of the ring-shaped support platform (5c) is in contact with the bottom surface D of the inner end of the support plate (101). The finger gauge device includes a lever (10), a cylindrical stepped head (11), a guide tube (12), a seat (13), and a measuring head (9); The seat (13) is fixedly connected to the inner cavity top wall of the support cylinder (5), and the lever (10) is rotatably mounted on the seat (13) through the pin (13a); the guide cylinder (12) is inserted into the support cylinder (5); The cylindrical stepped head (11) can be slidably installed inside the guide cylinder (12); a first spring (12a) is sleeved on the cylindrical surface of the cylindrical stepped head (11), the upper end of the first spring (12a) abuts against the top wall of the inner cavity of the guide cylinder (12), and the lower end abuts against the annular platform of the cylindrical stepped head (11); the first spring (12a) is in a compressed and energy-storing state to generate a downward force on the cylindrical stepped head (11); A square hole (5d) is provided on the side wall of the support cylinder (5), and a vertical hole (5e) is provided on the annular support platform (5c) to connect to the square hole (5d); the measuring head (9) is installed in the square hole (5d), and the upper end of the measuring head (9) is slidably engaged with the vertical hole (5e), ​​and the upper end of the measuring head (9) can extend out of the top surface of the annular support platform (5c); An upper retaining ring (9a) and a lower retaining ring (9b) are provided at intervals in the middle of the measuring head (9); one end of the lever (10) is U-shaped and is inserted into the gap between the upper retaining ring (9a) and the lower retaining ring (9b); the top surface of the other end of the lever (10) contacts the lower end of the cylindrical stepped head (11); A second spring (9c) is fitted on the lower part of the measuring head (9). The upper end of the second spring (9c) abuts against the bottom surface of the lower retaining ring (9b), and the lower end abuts against the bottom wall of the square hole (5d). The second spring (9c) is in a compressed and energy-storing state to generate an upward force on the measuring head (9). When the measuring head (9) moves downwards until its top is flush with the top surface of the annular support platform (5c), it drives the lever (10) to rotate and push the cylindrical step head (11) upwards, so that the top surface of the cylindrical step head (11) is higher than the top surface of the guide cylinder (12) to form a height difference.

2. The machining fixture for welding components of an air intake load-bearing frame as described in claim 1, characterized in that: The support and positioning structure includes multiple positioning blocks (2), each positioning block (2) being arc-shaped. The top surface of the positioning block (2) is a support surface (2b), and an arc-shaped boss (2a) is provided on the top surface of the positioning block (2). The multiple positioning blocks (2) are arranged in a ring, and the inner surfaces of each arc-shaped boss (2a) are on the same cylindrical surface. The diameter of the inner surface of each arc-shaped boss (2a) is the same as the outer diameter of the bottom edge plate of the housing (100) of the air intake bearing frame welding assembly. D1 is equal; the support surfaces (2b) of each segment positioning block (2) are coplanar, and the parallelism of each support surface (2b) relative to the bottom surface of the chassis (1) is not greater than 0.

02.

3. A machining fixture for welding components of an air intake load-bearing frame as described in claim 1, characterized in that: The drive device includes a threaded sleeve (6), a screw (7), and a wrench assembly (15). A flange is provided in the middle of the outer cylindrical surface of the threaded sleeve (6). The flange is fixed to the chassis (1) by a pin and screws, and the lower end of the threaded sleeve (6) is inserted into the center hole of the chassis (1). An annular body (7a) is provided on the upper part of the screw (7); a countersunk hole (5a) is provided in the center of the support cylinder (5); the threaded section at the lower end of the screw (7) passes through the countersunk hole (5a) and engages with the internal threaded hole of the threaded sleeve (6); the annular body (7a) is rotatably installed in the countersunk platform of the countersunk hole (5a); a cover plate (8) is provided on the top surface of the support cylinder (5) and covers the annular body (7a); A wrench connecting section (7b) is provided at the top of the annular body (7a); the wrench connecting section (7b) extends from the central inner hole of the cover plate (8), and a hexagonal hole (7c) is provided in the wrench connecting section (7b) for connecting with the wrench assembly (15).

4. A machining fixture for welding components of an air intake load-bearing frame as described in claim 3, characterized in that: The wrench assembly (15) includes a hexagonal head (15a), a steel pipe (15b), and a movable handle (15c); the movable handle (15c) is inserted laterally into the top of the steel pipe (15b); the upper end of the hexagonal head (15a) is inserted into the lower end of the steel pipe (15b) and then welded and fixed; the lower end of the hexagonal head (15a) is configured as a hexagon for insertion into the hexagonal hole (7c) at the top of the screw (7).

5. A machining fixture for welding components of an air intake load-bearing frame as described in claim 3, characterized in that: Multiple first grease grooves (5b) are evenly distributed in a ring on the countersunk hole (5a) of the support cylinder (5); multiple second grease grooves (8a) are evenly distributed in a ring on the lower surface of the cover plate (8); the first grease grooves (5b) and the second grease grooves (8a) are filled with grease.

6. A machining fixture for welding components of an air intake load-bearing frame as described in claim 3, characterized in that: A set screw (17) is provided on the cover plate (8); an annular groove (7d) is provided on the top surface of the annular body (7a) of the screw (7); the lower end of the set screw (17) extends into the annular groove (7d) and can be used to tighten the screw (7).

7. A machining fixture for welding components of an air intake load-bearing frame as described in claim 1, characterized in that: A cylindrical pin (18) is inserted laterally on the side of the support cylinder (5); a vertical waist-shaped hole (4a) is provided on the cylindrical surface of the guide cylinder (4); the cylindrical pin (18) is inserted into the waist-shaped hole (4a), and the outer cylindrical surface of the cylindrical pin (18) slides in fit with the waist-shaped hole (4a).

8. A machining fixture for welding components of an air intake load-bearing frame as described in claim 1, characterized in that: The pressure ring assembly (14) includes a first ring body (14a) and a second ring body (14b) attached to the lower surface of the first ring body (14a); the second ring body (14b) is made of fabric-reinforced phenolic resin; the pressure ring assembly (14) is used to press the top of each support plate (101) of the intake load-bearing frame welding assembly at the inner end position in the middle.

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