A thin-walled air intake casing welding fixture and its use method

Abstract

A thin-walled air intake casing welding fixture and its use method belong to the technical field of welding fixtures. The upper end of the base plate is fixedly connected to the positioning plate; the middle part of the positioning plate is fixedly plugged into the lower end of the positioning shaft, and the outer side of the positioning shaft is provided with a cone, which is located at the upper end of the positioning plate. The outer side of the cone is provided with a plurality of expansion blocks that fit with its cone surface, and the outer side of the upper surface of each expansion block is respectively connected to the corresponding inner pressure plate. The outer side of the upper end of the positioning shaft is provided with a horizontally arranged upper pressure plate, which presses the parts; multiple outer pressure plates are provided at the outer edge of the upper end of the base plate. The present invention has a compact structure, and can achieve precise positioning of welded parts by accurately calculating the angles and dimensions of each single piece, and designs multiple pressure plate structures to avoid interference, which is easy to operate and reduces labor intensity; multiple welding position structures are combined into one fixture, which effectively reduces processing costs, reduces fixture replacement time, and improves welding efficiency.

Description

Technical Field

[0001] The invention relates to a thin-wall air intake casing welding fixture and a use method thereof, belonging to the technical field of welding fixtures. Background Art

[0002] Welding is a critical step in joining components during part manufacturing. Some complex parts often have multiple weld locations, with up to 19 welds on a single part. These welds require not only excellent weld quality but also precise dimensional positioning to ensure the overall performance and functionality of the part.

[0003] Traditionally, welding these parts relies on fixtures to position and secure each welded component to ensure accurate and consistent welding. However, when there are numerous weld locations on a part, the design of traditional welding fixtures presents significant challenges. Specifically, traditional fixtures often struggle to accommodate and secure so many welded components simultaneously, necessitating repeated fixture changes to complete all welds. This significantly increases labor intensity and reduces welding efficiency.

[0004] Furthermore, traditional fixtures are relatively expensive to manufacture for parts with multiple welding locations. Since each fixture is typically designed for a specific welding location or combination, the need to manufacture and prepare multiple fixtures for a large number of complexly distributed welds undoubtedly increases production costs and time.

[0005] More seriously, due to the limited layout of the welding positions, the structural design of traditional fixtures often interferes with other parts of the part. This not only affects the normal use of the fixture but can also result in substandard welding quality. The occurrence of interference makes traditional fixtures incapable of handling complex parts welding. Summary of the Invention

[0006] In order to solve the problems existing in the background technology, the present invention provides a thin-walled air intake casing welding fixture and a method of using the same.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a thin-walled air intake casing welding fixture, comprising a base plate, a positioning plate, an inner pressure plate, an upper pressure plate, an outer pressure plate, a positioning shaft, a cone and an expansion block; the upper end of the base plate is fixedly connected to the positioning plate; the middle part of the positioning plate is fixedly plugged into the lower end of the positioning shaft, the outer side of the positioning shaft is sleeved with a cone, the cone is located at the upper end of the positioning plate, the outer side of the cone is provided with a plurality of expansion blocks that fit with its conical surface, the outer side of the upper surface of each expansion block is respectively connected to the corresponding inner pressure plate, the outer side of the upper end of the positioning shaft is sleeved with a horizontally arranged upper pressure plate, the upper pressure plate presses the parts; a plurality of outer pressure plates are provided at the outer edge of the upper end of the base plate.

[0008] An inner guide block is installed in each of the expansion blocks, and a horizontally arranged spring is installed in each of the inner guide blocks. One end of the spring is fixed on the inner guide block, and the other end of the spring is fixed on the expansion block.

[0009] A plurality of outer guide blocks are further provided at the outer edge of the upper end of the bottom plate, and a support plate is fixed to the outer side wall of each outer guide block, and a horizontal through groove is provided at the upper end of each outer guide block, and the through groove is slidably plugged into one end of the positioning pressure block, and the other end of the positioning pressure block extends to the outside of the outer guide block, and the other end of the positioning pressure block is provided with a notch; a screw is threadedly connected to the support plate, and the end of the screw extends into the through groove and is connected to one end of the positioning pressure block.

[0010] A method for using a thin-walled air intake casing welding fixture of the present invention comprises the following steps:

[0011] S1: Place the rear section of the air intake casing on the outside of the positioning plate, with the outer wall of the positioning plate fitting against the inner wall of the rear section of the air intake casing, to center the rear section of the air intake casing;

[0012] S2: Angular positioning of the rear section of the air intake casing through the angle pins;

[0013] S3: Place the rear section of the air intake casing on the base plate;

[0014] S4: Place the air intake casing inner shell onto the rear section of the air intake casing, and ensure that the inner wall of the air intake casing inner shell fits in with the outer walls of the plurality of expansion blocks;

[0015] S5: After installing the inner pressure plate, press the upper end surface of the inner shell of the air intake casing through the inner pressure plate;

[0016] S6: After welding the rear section of the air intake casing and the inner shell of the air intake casing, the inner pressure plate is disassembled;

[0017] S7: Place the air intake casing on the rear section of the air intake casing;

[0018] S8: placing an air intake casing front section on the upper ends of the air intake casing inner shell and the air intake casing outer shell;

[0019] S9: Use the positioning block to limit the support plate of the front section of the air intake casing;

[0020] S10: Install the outer pressure plate and press the top of the front section of the air intake casing tightly with the outer pressure plate;

[0021] S11: After welding the front section of the air intake casing and the inner shell of the air intake casing, the outer pressure plate is removed;

[0022] S12: Install the upper pressure plate and press the top of the front section of the air intake casing with the upper pressure plate;

[0023] S13: Welding the front section of the air intake casing and the air intake casing shell, as well as the air intake casing shell and the rear section of the air intake casing;

[0024] S14: Weld the laminar plate restrictor to the intake casing to complete the welding of the entire workpiece.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention has a compact structure and realizes precise positioning of welded parts by accurately calculating the angles and dimensions of each part. It also designs multiple pressure plate structures to avoid interference, making operation easy and reducing labor intensity. It combines multiple welding position structures into one fixture, effectively reducing processing costs, reducing fixture replacement time, and improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 yes Figure 1 AA section view;

[0029] Figure 3 It is a structural diagram of the base plate;

[0030] Figure 4 yes Figure 3 sectional view of

[0031] Figure 5 It is a structural diagram of the positioning disk;

[0032] Figure 6 yes Figure 5 sectional view of

[0033] Figure 7 It is a structural diagram of the positioning axis;

[0034] Figure 8 It is a schematic diagram of the structure of a cone;

[0035] Figure 9 It is a structural diagram of the rising block;

[0036] Figure 10 yes Figure 9 sectional view of

[0037] Figure 11 It is a structural diagram of the inner guide block;

[0038] Figure 12 yes Figure 11 A top view of

[0039] Figure 13 yes Figure 11 sectional view of

[0040] Figure 14 It is a structural diagram of the positioning block;

[0041] Figure 15 yes Figure 14 sectional view of . DETAILED DESCRIPTION

[0042] The technical solutions 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 only part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] A thin-walled air intake casing welding fixture comprises a base plate 1, a positioning plate 2, an inner pressure plate 16, an upper pressure plate 21, an outer pressure plate 24, a positioning shaft 34, a cone 35 and a swelling block 36; a positioning hole is provided on the base plate 1 of the disc structure for installing an angular pin 29, thereby achieving angular positioning of the parts; a countersunk hole and a through hole are provided at the upper end of the base plate 1 for fixed connection with the positioning plate 2 by corresponding screws and cylindrical pins; since the height of the rear section of the air intake casing and the inner shell of the air intake casing after welding is 88 mm, in order to avoid the positioning plate 2 being too high to affect the installation, the size height of the positioning plate 2 is designed to be 30 mm. The middle part of the positioning disk 2 is fixedly plugged with the lower end of the positioning shaft 34 by corresponding screws and cylindrical pins, and the outer side of the positioning shaft 34 is fitted with a cone 35 through a nut limiting gap. The cone 35 is located at the upper end of the positioning disk 2, and the outer side of the cone 35 is evenly distributed along its circumference with a plurality of expansion blocks 36 that fit with its cone surface. The outer side of the upper surface of each expansion block 36 is connected to the corresponding inner pressure plate 16 through a corresponding supporting assembly. The outer side of the upper end of the positioning shaft 34 is fitted with a horizontally arranged upper pressure plate 21, and the upper pressure plate 21 is pressed by corresponding screws and washers. The outer edge of the upper end of the base plate 1 is provided with a plurality of outer pressure plates 24 along its circumference, and the plurality of outer pressure plates 24 are connected to the base plate 1 through corresponding supporting assemblies; each of the supporting assemblies includes bolts, supports and nuts. This is a prior art, similar to the positioning and clamping mechanism in publication number CN202321418261.6, so it will not be repeated here.

[0044] An inner guide block 30 is installed in each of the expansion blocks 36 by corresponding screws and cylindrical pins. A horizontally arranged spring 31 is installed in each of the inner guide blocks 30. One end of the spring 31 is fixed to the inner guide block 30, and the other end of the spring 31 is fixed to the expansion block 36. The spring 31 is designed above the positioning plate 2 to cooperate with the inner guide block 30 and the expansion block 36 to avoid eccentricity when installing the rear section of the air intake casing and achieve precise positioning.

[0045] A plurality of outer guide blocks 7 are further provided at the outer edge of the upper end of the base plate 1 along its circumference, and each of the outer guide blocks 7 is respectively mounted on the base plate 1 by corresponding screws and cylindrical pins, and the outer side wall of each outer guide block 7 is fixed with a support plate 10 by corresponding screws, and the upper end of each outer guide block 7 is provided with a horizontally arranged through groove, and the through groove is slidably plugged with one end of the positioning pressure block 15, and the other end of the positioning pressure block 15 extends to the outside of the outer guide block 7, and the other end of the positioning pressure block 15 is provided with a notch running through its thickness direction; a screw 12 is screwed on the support plate 10, and the end of the screw 12 extends into the through groove and is connected with one end of the positioning pressure block 15.

[0046] A method for using a thin-walled air intake casing welding fixture of the present invention comprises the following steps:

[0047] S1: The rear section of the air intake casing is mounted on the outer side of the positioning plate 2, and the outer wall of the positioning plate 2 is fitted with the inner wall of the rear section of the air intake casing to center the rear section of the air intake casing;

[0048] S2: Angular positioning of the rear section of the air intake casing by means of the angular pin 29;

[0049] S3: Place the rear section of the air intake casing on the base plate 1;

[0050] S4: Place the air intake casing inner shell onto the rear section of the air intake casing, so that the inner sidewall of the air intake casing inner shell is in contact with the outer sidewalls of the plurality of expansion blocks 36;

[0051] S5: After installing the inner pressure plate 16, the upper end surface of the inner shell of the air intake casing is pressed by the inner pressure plate 16;

[0052] S6: After welding the rear section of the air intake casing and the inner shell of the air intake casing, the inner pressure plate 16 is disassembled;

[0053] S7: Place the air intake casing on the rear section of the air intake casing;

[0054] S8: placing an air intake casing front section on the upper ends of the air intake casing inner shell and the air intake casing outer shell;

[0055] S9: Use the positioning block 15 to limit the support plate of the front section of the air intake casing for welding positioning of the support plate, thereby achieving precise positioning and fixation;

[0056] S10: Install the outer pressure plate 24 and press the top of the front section of the air intake casing with the outer pressure plate 24;

[0057] S11: After welding the front section of the air intake casing and the inner shell of the air intake casing, the outer pressure plate 24 is disassembled;

[0058] S12: Install the upper pressing plate 21 to press the top of the front section of the air intake casing.

[0059] S13: Welding the front section of the air intake casing and the air intake casing shell, as well as the air intake casing shell and the rear section of the air intake casing;

[0060] S14: Weld the laminar plate restrictor to the intake casing to complete the welding of the entire workpiece.

[0061] Since there are many welding positions on parts and there are welding points both inside and outside, multiple pressure plates are designed. When a pressure plate at one location is in use, the other pressure plates are not installed, which prevents welding interference and the time for replacing fixtures, thereby improving welding efficiency.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0063] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A thin-walled air intake casing welding fixture, characterized by: The invention comprises a bottom plate (1), a positioning plate (2), an inner pressure plate (16), an upper pressure plate (21), an outer pressure plate (24), a positioning shaft (34), a cone (35) and an expansion block (36); the upper end of the bottom plate (1) is fixedly connected to the positioning plate (2); an angular pin (29) is installed on the bottom plate (1); the middle of the positioning plate (2) is fixedly plugged with the lower end of the positioning shaft (34); the outer side of the positioning shaft (34) is provided with a cone (35); the cone (35) is located at the upper end of the positioning plate (2); the outer side of the cone (35) is provided with a plurality of holes that fit with the cone surface thereof. The expansion block (36) is provided with a plurality of expansion blocks (36), the outer side of the upper surface of each expansion block (36) is connected to the corresponding inner pressure plate (16), and the outer side walls of the plurality of expansion blocks (36) are all in contact with the inner side wall of the air intake casing inner shell; the inner pressure plate (16) is used to press the upper end surface of the air intake casing inner shell; the outer side of the upper end of the positioning shaft (34) is provided with a horizontally arranged upper pressure plate (21), and the upper pressure plate (21) presses the parts; a plurality of outer pressure plates (24) are provided at the outer edge of the upper end of the bottom plate (1), and the outer pressure plates (24) and the upper pressure plate (21) are both used to press the top end of the front section of the air intake casing.

2. The thin-walled air intake casing welding fixture according to claim 1, characterized in that: An inner guide block (30) is installed in each of the expansion blocks (36), and a horizontally arranged spring (31) is installed in each of the inner guide blocks (30). One end of the spring (31) is fixed to the inner guide block (30), and the other end of the spring (31) is fixed to the expansion block (36).

3. The thin-walled air intake casing welding fixture according to claim 2, characterized in that: A plurality of outer guide blocks (7) are further provided at the outer edge of the upper end of the base plate (1), and a support plate (10) is fixed to the outer side wall of each outer guide block (7). The upper end of each outer guide block (7) is provided with a horizontally arranged through groove, and the through groove is slidably plugged with one end of the positioning pressure block (15), and the other end of the positioning pressure block (15) extends to the outside of the outer guide block (7), and the other end of the positioning pressure block (15) is provided with a notch; a screw rod (12) is screwed on the support plate (10), and the end of the screw rod (12) extends into the through groove and is connected to one end of the positioning pressure block (15).

4. A method for using the thin-walled air intake casing welding fixture according to claim 3, characterized in that: The method comprises the following steps: S1: The rear section of the air intake casing is mounted on the outer side of the positioning plate (2), and the outer wall of the positioning plate (2) is fitted with the inner wall of the rear section of the air intake casing, so as to center the rear section of the air intake casing; S2: Angular positioning of the rear section of the air intake casing by means of the angular pin (29); S3: Place the rear section of the air intake casing on the base plate (1); S4: placing the air intake casing inner shell onto the rear section of the air intake casing, so that the inner side wall of the air intake casing inner shell and the outer side walls of the plurality of expansion blocks (36) are all fitted together; S5: After installing the inner pressure plate (16), the upper end surface of the inner shell of the air intake casing is pressed by the inner pressure plate (16); S6: After welding the rear section of the air intake casing and the inner shell of the air intake casing, the inner pressure plate (16) is disassembled; S7: Place the intake casing on the rear section of the intake casing; S8: placing an air intake casing front section on the upper ends of the air intake casing inner shell and the air intake casing outer shell; S9: Use the positioning block (15) to limit the support plate of the front section of the air intake casing; S10: Install the outer pressure plate (24) and press the top of the front section of the air intake casing through the outer pressure plate (24); S11: After welding the front section of the air intake casing and the inner shell of the air intake casing, the outer pressure plate (24) is disassembled; S12: Install the upper pressing plate (21) and press the top of the front section of the air intake casing through the upper pressing plate (21); S13: Welding the front section of the air intake casing and the air intake casing shell, as well as the air intake casing shell and the rear section of the air intake casing; S14: Weld the laminar plate restrictor to the intake casing to complete the welding of the entire workpiece.

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