A forked ring pressing positioning tool

Abstract

The utility model relates to liquid rocket storage tank welding positioning technical field discloses a kind of forked ring pressure positioning tool, it includes base;Tool body, tool body is rotatably connected with base, and it is equipped with through-hole on tool body;Compression block, compression block is connected in the top of tool body, and it is equipped with compression inclined plane on compression block, and the included angle between compression inclined plane and the bottom surface of base is formed and the included angle is acute angle;Locking bolt, locking bolt passes through through-hole and is connected with through-hole screw thread.This utility model can exert radial pressure and downward pressure to forked ring simultaneously, make forked ring closely adhere to the large ring below it, avoid the axial slip of forked ring relative to large ring, to improve the positioning effect of forked ring, to improve the welding quality of forked ring.Moreover, locking bolt can lock tool body on forked ring, to keep the compression positioning of forked ring, without external power source to continuously compress this tool.

Description

Technical Field

[0001] This utility model relates to the field of welding and positioning technology for liquid rocket tanks, specifically to a fork-shaped ring clamping and positioning fixture. Background Technology

[0002] Liquid rocket propellant tanks are key components in liquid rocket engine systems that store propellants (fuel and oxidizer). Their performance (structural strength, sealing, and lightweight) directly affects the rocket's carrying capacity, reliability, and safety.

[0003] Liquid rocket propellant tanks are constructed by welding the front tank bottom, barrel section, and rear tank bottom sequentially. The fork-shaped ring, as a key load-bearing connector between the tank barrel section and the tank bottom, is crucial to the quality of its welding. In existing manufacturing processes, efficient welding methods such as friction welding are typically used to weld the fork-shaped ring to the larger ring below. The main steps of this process include: first, inserting an inner diaphragm into the cavity of the fork-shaped ring, using the diaphragm to support the fork-shaped ring from the inside; then, driving one or more external clamping blocks to apply a radially inward thrust to the fork-shaped ring, causing it to adhere tightly to the inner diaphragm. This achieves precise positioning and rigid clamping of the fork-shaped ring during the welding process, providing a foundation for subsequent high-precision friction welding.

[0004] However, during the welding process, the fork ring tends to slip axially. Existing technical solutions are unable to restrict the axial movement of the fork ring, resulting in poor positioning and affecting the welding quality between the fork ring and the large ring. Utility Model Content

[0005] To address the problem of poor positioning effect of the fork ring in the prior art, which affects the welding quality, this utility model provides a fork ring clamping and positioning fixture, which can improve the positioning effect of the fork ring and thus improve the welding quality.

[0006] To solve the above-mentioned technical problems, this utility model provides a fork-shaped ring clamping and positioning fixture, which includes a base; a fixture body, the fixture body being rotatably connected to the base, the fixture body having a through hole; a clamping block, the clamping block being connected to the top of the fixture body, the clamping block having a clamping inclined surface, the clamping inclined surface forming an angle with the bottom surface of the base, the angle being an acute angle; and a locking bolt, the locking bolt passing through the through hole and being threadedly connected to the through hole.

[0007] In existing technology, the fork-shaped ring has a tapered surface designed for stress transition. When using the aforementioned fixture, the base is first installed on the welding equipment; before clamping the fork-shaped ring, an internal diaphragm is placed inside the fork-shaped ring to support it from the inside; then, the fixture body is pushed to rotate until the clamping ramp presses against the tapered surface of the fork-shaped ring; finally, bolts are simultaneously screwed into the through hole and the threaded hole on the fork-shaped ring to lock the fixture body onto the fork-shaped ring, thus completing the clamping and positioning of the fork-shaped ring. Because the pressure exerted by the clamping ramp on the fork-shaped ring has a downward vertical component, this component can press the fork-shaped ring against the larger ring below, preventing axial slippage of the fork-shaped ring relative to the larger ring, thereby improving the positioning effect of the fork-shaped ring and thus improving the welding quality. Furthermore, the locking bolts can lock the fixture onto the fork-shaped ring, maintaining its clamping and positioning without requiring an external power source to continuously clamp the fixture.

[0008] Preferably, the clamping bevel is an inwardly concave arc-shaped surface. The conical surface of the fork-shaped ring is also an arc-shaped surface. Designing the clamping bevel as an arc-shaped surface makes the clamping block fit more closely to the fork-shaped ring, which helps to improve the stability of the fork-shaped ring and can also prevent the clamping block from pressing indentations on the fork-shaped ring.

[0009] Preferably, the tooling body includes: a first side plate; a second side plate parallel to the first side plate; a first intermediate block located between and connected to both the first and second side plates, with a through hole disposed on the first intermediate block; a clamping block connected to both the first and second side plates; and a base rotatably connected to both the first and second side plates. Such a tooling body is lighter and less expensive.

[0010] Preferably, the tooling body further includes: a second intermediate block, located between and connected to both the first and second side plates, and also connected to the clamping block; and a third intermediate block, located between and connected to both the first and second side plates; both the first and second side plates are rotatably connected to the base via the third intermediate block. The second and third intermediate blocks can respectively improve the local stiffness of the tooling body, thereby improving the overall bending and torsional stiffness of the tooling body, which is beneficial to improving the reliability and service life of the tooling.

[0011] Preferably, the third intermediate block is provided with a limiting protrusion for contacting the large ring. When the main body of the tooling rotates to press the fork-shaped ring, the limiting protrusion will first contact the side of the large ring below, ensuring that the pressing inclined surface on the pressing block and the conical surface of the fork-shaped ring are in the optimal fitting position. The limiting protrusion acts as a positioning reference, ensuring the consistency of each pressing action.

[0012] Preferably, a first reinforcing rib connects the first side plate to the clamping block, and a second reinforcing rib connects the second side plate to the clamping block. Both the first and second reinforcing ribs can enhance the rigidity and strength of the connection, which is beneficial to improving the rigidity, stability, and durability of the entire tooling.

[0013] Preferably, the system also includes a pad, which is detachably connected to the bottom of the base. The pad is used to abut against the flange at the bottom of the large ring. By replacing pads of different heights, the clamping height of the clamping block can be adjusted to ensure that the clamping block can be clamped in the optimal position when facing fork-shaped rings of different sizes.

[0014] Preferably, a support block is connected to one side of the bottom of the pad, and a clearance groove is formed between the support block and the pad. In use, the support block directly contacts the flange at the bottom of the large ring, while the pad is suspended. The flange at the bottom of the large ring has raised structures; the clearance groove prevents the pad from directly contacting these raised structures, thereby avoiding damage to them.

[0015] Preferably, the clamping block is made of aluminum alloy. Aluminum alloy is easier to machine than steel, such as by cutting and milling, making the machining of the clamping bevel easier.

[0016] Preferably, a soft rubber layer is provided on the clamping inclined surface. The soft rubber layer can increase the friction between the clamping block and the fork ring, further improve the stability of the fork ring, and prevent indentations from being pressed onto the surface of the fork ring.

[0017] The beneficial effects of this invention are as follows: A clamping ramp is provided on the clamping block, which simultaneously applies radial and downward pressure to the fork-shaped ring, ensuring it is tightly pressed against the larger ring below. This prevents axial slippage of the fork-shaped ring relative to the larger ring, thereby improving the positioning effect of the fork-shaped ring and thus enhancing its welding quality. Furthermore, the locking bolts can lock the main body of the fixture onto the fork-shaped ring, maintaining its clamped positioning without requiring a continuous external power source to clamp the fixture. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a fork-shaped ring clamping and positioning tool according to an embodiment of the present utility model; Figure 2 A schematic diagram showing the usage state of a fork-shaped ring clamping and positioning tooling; Figure 3 This is a longitudinal sectional view of a fork-shaped ring clamping and positioning fixture; Figure 4 This is a structural diagram of the pad and support block.

[0020] Explanation of reference numerals in the attached figures: 1-Base; 2-Main body of tooling; 201-First side plate; 202-Second side plate; 203-First intermediate block; 2031-Through hole; 204-Second intermediate block; 205-Third intermediate block; 206-Limiting protrusion; 3-Clamping block; 301-Clamping inclined surface; 4-Locking bolt; 5-First reinforcing rib; 6-Second reinforcing rib; 7-Pad; 8-Supporting block; 801-Allowing groove; 9-Fork-shaped ring; 10-Large circular ring; 11-Inner membrane. Detailed Implementation

[0021] 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0023] An embodiment of this utility model provides a fork-shaped ring clamping and positioning fixture, such as... Figure 1 As shown, it includes a base 1; a tooling body 2, which is rotatably connected to the base 1, and the tooling body 2 is provided with a through hole 2031; a clamping block 3, which is connected to the top of the tooling body 2, and the clamping block 3 is provided with a clamping inclined surface 301, which forms an angle with the bottom surface of the base 1 and the angle is an acute angle; and a locking bolt 4, which passes through the through hole 2031 and is threadedly connected to the through hole 2031.

[0024] like Figure 2As shown, in the prior art, the fork-shaped ring 9 has a tapered surface designed for stress transition. In this embodiment, the base 1 is first installed on the welding equipment; before pressing the fork-shaped ring 9, the inner diaphragm 11 is placed into the inner cavity of the fork-shaped ring 9, using the inner diaphragm 11 to support the fork-shaped ring 9 from the inside; then, the tooling body 2 is pushed to rotate it until the pressing inclined surface 301 presses against the tapered surface of the fork-shaped ring 9; finally, the bolts are simultaneously screwed into the through hole 2031 and the threaded hole on the fork-shaped ring 9, locking the tooling body 2 onto the fork-shaped ring 9, thereby completing the pressing and positioning of the fork-shaped ring 9. Since the pressure of the pressing inclined surface 301 on the fork-shaped ring 9 has a vertically downward component, this component can press the fork-shaped ring 9 against the large circular ring 10 below, preventing the fork-shaped ring 9 from axially slipping relative to the large circular ring 10, which is beneficial to improving the welding quality. Furthermore, the locking bolt 4 can lock the tooling onto the fork ring 9, thereby maintaining the pressure and positioning of the fork ring 9 without the need for an external power source to continuously press the tooling.

[0025] Furthermore, the clamping inclined surface 301 is an inwardly concave arc-shaped surface. The conical surface of the fork-shaped ring 9 is also an arc-shaped surface. Designing the clamping inclined surface 301 as an arc-shaped surface makes the clamping block 3 fit more closely with the fork-shaped ring 9, which is beneficial to improving the stability of the fork-shaped ring 9 and can also prevent the clamping block 3 from pressing indentations on the fork-shaped ring 9.

[0026] Furthermore, combined Figure 1 and Figure 3 As shown, the tooling body 2 includes: a first side plate 201; a second side plate 202, parallel to the first side plate 201; a first intermediate block 203, located between and connected to both the first side plate 201 and the second side plate 202, with a through hole 2031 on the first intermediate block 203; a clamping block 3, connected to both the first side plate 201 and the second side plate 202; and a base 1, rotatably connected to both the first side plate 201 and the second side plate 202. This tooling body 2 is lighter and less expensive.

[0027] Furthermore, the tooling body 2 also includes: a second intermediate block 204, which is located between and connected to both the first side plate 201 and the second side plate 202, and is also connected to the clamping block 3; and a third intermediate block 205, which is located between and connected to both the first side plate 201 and the second side plate 202; both the first side plate 201 and the second side plate 202 are rotatably connected to the base 1 via the third intermediate block 205. The second intermediate block 204 and the third intermediate block 205 can respectively improve the local stiffness of the tooling body 2, thereby improving the overall bending and torsional stiffness of the tooling body 2, which is beneficial to improving the reliability and service life of the tooling.

[0028] Furthermore, the third intermediate block 205 is provided with a limiting protrusion 206 for contacting the large ring 10. When the tooling body 2 rotates to press the fork-shaped ring 9, the limiting protrusion 206 will first contact the side of the large ring 10 below, ensuring that the pressing inclined surface 301 on the pressing block 3 and the conical surface of the fork-shaped ring 9 are in the set optimal contact position. The limiting protrusion 206 is equivalent to a positioning reference, which can ensure the consistency of each pressing action.

[0029] Furthermore, a first reinforcing rib 5 connects the first side plate 201 to the clamping block 3, and a second reinforcing rib 6 connects the second side plate 202 to the clamping block 3. Both the first reinforcing rib 5 and the second reinforcing rib 6 can enhance the rigidity and strength of the connection, which is beneficial to improving the rigidity, stability and durability of the entire tooling.

[0030] Furthermore, combined Figures 1 to 4 As shown, the tooling also includes a pad 7, which is detachably connected to the bottom of the base 1. Specifically, the pad 7 is connected to the base 1 by bolts. The pad 7 is used to abut against the flange at the bottom of the large ring 10. By replacing the pads 7 with different heights, the clamping height of the clamping block 3 can be adjusted to ensure that the clamping block 3 can be clamped in the optimal position when facing different sizes of fork-shaped rings 9.

[0031] Furthermore, a support block 8 is connected to one side of the bottom of the pad 7, and a clearance groove 801 is formed between the support block 8 and the pad 7. In use, the support block 8 directly contacts the flange at the bottom of the large ring 10, while the pad 7 is suspended. There are protruding structures on the flange at the bottom of the large ring 10, and the clearance groove 801 can prevent the pad 7 from directly contacting these protruding structures, thereby avoiding damage to these protruding structures caused by the pad 7.

[0032] Furthermore, the clamping block 3 is made of aluminum alloy. Compared to steel, aluminum alloy is easier to machine, such as cutting and milling, making the machining of the clamping inclined surface 301 easier.

[0033] Furthermore, a soft rubber layer is provided on the clamping inclined surface 301. The soft rubber layer can increase the friction between the clamping block 3 and the fork ring 9, further improve the stability of the fork ring 9, and prevent indentations from being pressed onto the surface of the fork ring 9.

[0034] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A fork-shaped ring clamping and positioning fixture, characterized in that, include: Base (1); Tooling body (2), the tooling body (2) is rotatably connected to the base (1), and the tooling body (2) is provided with a through hole (2031). A clamping block (3) is connected to the top of the tooling body (2). The clamping block (3) is provided with a clamping inclined surface (301). The clamping inclined surface (301) forms an angle with the bottom surface of the base (1) and the angle is acute. A locking bolt (4) passes through the through hole (2031) and is threaded into the through hole (2031).

2. The fork-shaped ring clamping and positioning fixture according to claim 1, characterized in that, The pressing inclined surface (301) is an inwardly concave arc-shaped surface.

3. The fork-shaped ring clamping and positioning fixture according to claim 1, characterized in that, The tooling body (2) includes: First side plate (201); The second side plate (202) is parallel to the first side plate (201); The first intermediate block (203) is located between the first side plate (201) and the second side plate (202) and is connected to both of them. The through hole (2031) is provided on the first intermediate block (203). The clamping block (3) is simultaneously connected to the first side plate (201) and the second side plate (202); the base (1) is simultaneously rotatably connected to the first side plate (201) and the second side plate (202).

4. The fork-shaped ring clamping and positioning fixture according to claim 3, characterized in that, The tooling body (2) also includes: The second intermediate block (204) is located between the first side plate (201) and the second side plate (202) and is connected to both of them. The second intermediate block (204) is also connected to the clamping block (3). The third intermediate block (205) is located between the first side plate (201) and the second side plate (202) and is connected to both of them simultaneously; The first side plate (201) and the second side plate (202) are rotatably connected to the base (1) via the third intermediate block (205).

5. The fork-shaped ring clamping and positioning fixture according to claim 4, characterized in that, The third intermediate block (205) is provided with a limiting protrusion (206) for contacting the large ring.

6. The fork-shaped ring clamping and positioning fixture according to claim 3, characterized in that, A first reinforcing rib (5) is connected between the first side plate (201) and the clamping block (3), and a second reinforcing rib (6) is connected between the second side plate (202) and the clamping block (3).

7. The fork-shaped ring clamping and positioning fixture according to claim 1, characterized in that, It also includes a pad (7) which is detachably connected to the bottom of the base (1).

8. The fork-shaped ring clamping and positioning fixture according to claim 7, characterized in that, A support block (8) is connected to one side of the bottom of the pad (7), and an clearance groove (801) is formed between the support block (8) and the pad (7).

9. The fork-shaped ring clamping and positioning fixture according to claim 1, characterized in that, The clamping block (3) is made of aluminum alloy.

10. A fork-shaped ring clamping and positioning fixture according to any one of claims 1 to 9, characterized in that, A soft rubber layer is provided on the pressing inclined surface (301).

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