Fixing structure for inner conical surface of cartridge receiver

Abstract

The utility model provides a casing inner conical surface fixing structure, and relates to the technical field of engine casings. The fixing structure comprises a positioning tool plate (1), a supporting plate (2) and a plurality of supporting blocks (3). The supporting plate (2) is connected to the end face of one side of the inner casing. The positioning tool plate (1) is installed on the end face of the other side of the inner casing and further connected with the outer casing. And each supporting block (3) is buckled and fixed on the supporting plate (2), is attached to the inner wall of the inner casing and is used for preventing the inner conical surface of the casing from deforming. The clamping deformation and the welding thermal deformation of the inner casing and the outer casing can be effectively limited, and the positioning precision and the welding quality can be improved.

Description

Technical Field

[0001] This utility model relates to the field of engine casing technology, specifically to a conical surface fixing structure inside the casing. Background Technology

[0002] like Figure 1 As shown, the engine casing consists of an inner casing, an outer casing, and a support plate. During engine casing assembly, the support plate needs to be welded to the inner casing. Since both the inner and outer casings are thin-walled components, deformation can easily occur during assembly due to welding and clamping, ultimately affecting the engine casing's performance.

[0003] In order to solve the deformation problem during engine casing assembly, special welding fixtures are usually made for the casing. However, the existing fixture design has the following problems: (1) Insufficient deformation control: The contact surface between the support plate and the casing lacks effective support during the welding process, resulting in large welding deformation and affecting the aerodynamic performance of the casing; (2) Low positioning accuracy: The assembly datum of the inner and outer casings is difficult to unify, which can easily cause the support plate angle to deviate and require multiple rework adjustments; (3) Unstable weld quality: The gap between the support plate and the casing is not accurately controlled, which can easily cause adhesion or poor weld formation during welding.

[0004] Therefore, a new type of internal conical surface fixing structure for the casing is needed to assist in welding assembly. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a conical surface fixing structure inside the casing, which is achieved through the following technical solution:

[0006] A casing inner conical surface fixing structure, the casing including an inner casing, an outer casing and a support plate; the fixing structure includes a positioning tooling plate, a support plate and a plurality of support blocks;

[0007] The support plate is connected to one end face of the inner casing; the positioning tooling plate is installed on the other end face of the inner casing, and the positioning tooling plate is also connected to the outer casing.

[0008] Each of the aforementioned support blocks is fastened and fixed to the support plate and attached to the inner wall of the inner casing to prevent deformation of the inner conical surface of the casing.

[0009] Optionally or preferably, the support block has a support plate forming groove on the side near the inner conical surface of the inner casing; the support plate forming groove is a contoured structure of the support plate connecting end face.

[0010] Optionally or preferably, the support block has an auxiliary groove on the side of the inner conical surface of the inner casing; the auxiliary groove is used to discharge gas or welding slag.

[0011] Optionally or preferably, the support block is provided with a connecting key on the side near the support plate; the support plate is provided with a keyway corresponding to the connecting key near the support block.

[0012] Optionally or preferably, the support block is made of stainless steel.

[0013] Optionally or preferably, the side surface of the support block near the inner conical surface of the inner casing is plated with chromium, which can ensure the forming effect of the weld and prevent adhesion.

[0014] Optionally or preferably, each of the support blocks is fixedly connected to the support plate by at least two bolts.

[0015] Optionally or preferably, the number of support blocks is the same as the number of support plates, both being 20.

[0016] Optionally or preferably, the outer end face of the support plate is flush with the outer end face of the inner casing; the support plate is connected and fixed to the inner casing by a first pressure plate and screws.

[0017] Optionally or preferably, the outer edge of the positioning tooling plate extends into a plurality of outer casing fixing plates; the outer casing fixing plates are fixed to the outer casing by a second pressure plate and screwed together.

[0018] Based on the above technical solution, the following technical effects can be achieved:

[0019] This utility model provides a casing inner conical surface fixing structure, which uses a double-end fixing design of support plate and positioning tooling plate, and the support block provides wall support for the inner casing, effectively limiting the clamping deformation and welding thermal deformation of the inner and outer casings, and improving positioning accuracy and welding quality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram (perspective view) of the engine casing involved in this utility model;

[0022] Figure 2 This is a structural schematic diagram (three-dimensional view) of the present invention;

[0023] Figure 3 This is the left view (sectional view) of this utility model;

[0024] Figure 4This is a schematic diagram (three-dimensional view) of the support block in this utility model;

[0025] The accompanying diagram illustrates:

[0026] 1-Positioning tooling plate, 2-Support plate, 3-Support block, 4-First pressure plate, 5-Second pressure plate, 6-Inner casing, 7-Outer casing, 8-Support plate, 101-Outer casing fixing plate, 301-Support plate forming groove, 302-Auxiliary groove, 303-Connecting key. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] In a preferred embodiment:

[0029] This embodiment provides a conical surface fixing structure inside the casing, such as Figure 2 and Figure 3 As shown, the fixing structure includes a positioning tooling plate 1, a support plate 2, and multiple support blocks 3;

[0030] The support plate 2 is connected to one end face of the inner casing; the positioning fixture plate 1 is installed on the other end face of the inner casing, and the positioning fixture plate 1 is also connected to the outer casing.

[0031] Each of the support blocks 3 is fastened and fixed to the support plate 2 and attached to the inner wall of the inner casing to prevent deformation of the inner conical surface of the casing.

[0032] Furthermore, in this embodiment, as Figure 4 As shown, the support block 3 has a support plate forming groove 301 on one side near the inner conical surface of the inner casing; the support plate forming groove 301 is a contour structure of the support plate connecting end face.

[0033] Furthermore, an auxiliary groove 302 is provided on the surface of the support block 3 near the inner conical surface of the inner casing; the auxiliary groove 302 is used to discharge gas or welding slag.

[0034] Furthermore, in this embodiment, the support block 3 is provided with a connecting key 303 on the side near the support plate 2; the support plate 2 is provided with a keyway corresponding to the connecting key 303 near the support block 3.

[0035] Furthermore, in this embodiment, the support block 3 is made of stainless steel.

[0036] Furthermore, in this embodiment, the surface of the support block 3 near the inner conical surface of the inner casing is plated with chromium, which can ensure the forming effect of the weld and prevent adhesion.

[0037] Furthermore, in this embodiment, each of the support blocks 3 is fixedly connected to the support plate 2 by at least two bolts.

[0038] Furthermore, in this embodiment, the number of support blocks 3 is the same as the number of support plates, both being 20.

[0039] Furthermore, such as Figure 3 As shown, the outer end face of the support plate 2 is flush with the outer end face of the inner casing; the support plate 2 is connected and fixed to the inner casing by the first pressure plate 4 and screws.

[0040] Furthermore, multiple outer casing fixing plates 101 extend from the outer edge of the positioning tooling plate 1; the outer casing fixing plates 101 are fixed to the outer casing by screws through the second pressure plate 5.

[0041] The internal conical surface fixing structure of the casing provided in this embodiment has the following advantages:

[0042] (1) In this embodiment, the bidirectional connection between the positioning tooling plate 1 and the inner and outer casings, and the tight fit between the support block 3 and the inner wall of the inner casing, can ensure the precise alignment and rigid fixation of the casing components during the welding process, effectively control welding deformation, and ensure that the geometric accuracy of the casing meets the design requirements.

[0043] (2) In this embodiment, the support plate forming groove 301 of the support block 3 is matched with the support plate connecting end face in a contour matching manner. Combined with the uniform distribution design of the support plate 2, the welding heat stress is dispersed to the overall structure, avoiding the warping or shrinkage deformation of the inner cone surface caused by local stress concentration.

[0044] (3) The auxiliary groove 302 of the support block 3 in this embodiment can be used to discharge gas and welding slag during the welding process, reducing defects such as porosity and slag inclusion; the chrome-plated surface reduces the risk of molten metal sticking to the tooling, while improving the surface forming quality of the weld and reducing the amount of subsequent processing.

[0045] (4) The design of the connection key 303 and the keyway in this embodiment, combined with multiple bolts, ensures the rapid positioning and shear stability of the support block 3 and the support plate 2; the stainless steel material is resistant to high welding temperatures, avoids thermal deformation of the tooling, and extends its service life.

[0046] (5) In this embodiment, the outer casing fixing plate 101 is screwed to the outer casing through the second pressure plate 5, forming a bidirectional constraint with the first pressure plate 4 on the end face of the inner casing, balancing the deformation trend of the inner and outer casings during the welding process, and ensuring the concentricity of the overall structure.

[0047] When welding and assembling the casing using the internal conical surface fixing structure provided in this embodiment, the following steps are included:

[0048] S1. Screw the support plate 2 onto one side end face of the inner casing 6;

[0049] S2. Install the support plate 8 from the inner hole side of the inner casing 6 between the inner casing 6 and the outer casing 7 in sequence; install bolts on the support plate 8 for fixing, but do not tighten the bolts temporarily.

[0050] S3. Install the support block 3 on the support plate 2 and attach it to the inner wall of the inner casing;

[0051] S4. Assemble the positioning fixture plate 1 onto the other end face of the casing, i.e. the large end of the inner casing and the outer casing; use cylindrical pins to position the angular position, and use stop to position the circumferential position of the inner casing and the outer casing. After assembly, use pressure plates to fix the inner casing 6 onto the positioning fixture plate 1, and use the second pressure plate 5 to fix the outer casing 7 onto the positioning fixture plate 1.

[0052] S5. Tighten all bolts and pins used for mounting the support plate; specifically, the tightening torque of the bolts is 6.1-8.3 Nm; the tightening torque of the pins is 14.1-19.3 Nm;

[0053] S6, such as Figure 2 and Figure 3 As shown, the casing and its accessories are hoisted and placed on the side. A support shaft is inserted into the center hole of the positioning tooling plate 1 and the support plate 2, and the support shaft is mounted on the tooling bracket.

[0054] S7. Clean the area to be welded with anhydrous ethanol, and then weld the support plate 8 to the inner casing 6.

[0055] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A casing inner conical surface fixing structure, the casing comprising an inner casing, an outer casing, and a support plate, characterized in that: The fixing structure includes a positioning tooling plate (1), a support plate (2), and multiple support blocks (3); The support plate (2) is connected to one side end face of the inner casing; the positioning tooling plate (1) is installed on the other side end face of the inner casing, and the positioning tooling plate (1) is also connected to the outer casing; Each of the support blocks (3) is fastened and fixed on the support plate (2) and attached to the inner wall of the inner casing to prevent deformation of the inner conical surface of the casing.

2. The casing inner conical surface fixing structure according to claim 1, characterized in that: The support block (3) has a support plate forming groove (301) on one side near the inner conical surface of the inner casing; the support plate forming groove (301) is a contour structure of the support plate connecting end face.

3. The casing inner conical surface fixing structure according to claim 1, characterized in that: The support block (3) has an auxiliary groove (302) on the side of the inner conical surface of the inner casing; the auxiliary groove (302) is used to discharge gas or welding slag.

4. The casing inner conical surface fixing structure according to claim 1, characterized in that: The support block (3) is provided with a connecting key (303) on the side near the support plate (2); the support plate (2) is provided with a keyway corresponding to the connecting key (303) near the support block (3).

5. The casing inner conical surface fixing structure according to claim 1, characterized in that: The support block (3) is made of stainless steel.

6. The casing inner conical surface fixing structure according to claim 1, characterized in that: The support block (3) has a chromium-plated surface on the side near the inner conical surface of the inner casing, which can ensure the forming effect of the weld and prevent adhesion.

7. The casing inner conical surface fixing structure according to claim 1, characterized in that: Each of the support blocks (3) is fixedly connected to the support plate (2) by at least two bolts.

8. The casing inner conical surface fixing structure according to claim 1, characterized in that: The number of support blocks (3) is the same as the number of support plates, both being 20.

9. The casing inner conical surface fixing structure according to claim 1, characterized in that: The outer end face of the support plate (2) is flush with the outer end face of the inner casing; the support plate (2) is connected and fixed to the inner casing by the first pressure plate (4) and screws.

10. The casing inner conical surface fixing structure according to claim 1, characterized in that: The outer edge of the positioning tooling plate (1) extends into a plurality of outer casing fixing plates (101); the outer casing fixing plates (101) are fixed to the outer casing by means of a second pressure plate (5) screwed together.

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