A type of docking truss trimming tool

Abstract

This utility model provides a tooling for trimming docking trusses, used for trimming docking trusses. The tooling includes a trimming mold comprising a mating part and an abutment part. The mating part has a rectangular cross-section, its dimensions matching the space enclosed by the middle section, two first segments, and two second segments of the docking truss. The abutment part extends from the mating part along a first direction, its length exceeding that of the third segment so that it extends beyond the docking truss in the first direction after mating. A clamp is provided to hold the outer end face of the middle section and the end face of the abutment part from both sides along the first direction, fixing and clamping the docking truss to prevent deformation of the middle section when trimming the angle between the first segment and the middle section by striking the root of the first segment. Compared with the prior art, the docking truss trimming tooling provided by this utility model greatly facilitates operation, enabling rapid and precise trimming of the docking truss. This tooling not only improves trimming efficiency but also significantly reduces product surface defects, thereby improving product quality.

Description

Technical Field

[0001] This utility model relates to the field of aerospace product manufacturing equipment technology, and in particular to a docking gantry trimming fixture. Background Technology

[0002] In aerospace product manufacturing, stringers are crucial structural components, and their precision directly impacts the stability and safety of the entire structure. Furthermore, the docking stringer, as a key component in the fairing structure affecting separation operations, requires particularly stringent dimensional accuracy.

[0003] However, during the production of the docking gantry, dimensional deviations often occur due to the influence of raw materials and heat treatment processes, especially the 90° angle and 30mm opening size of the docking gantry. These dimensional deviations can have unpredictable effects on the forming of the rocket fairing and the separation action during the launch process.

[0004] In existing buttress finishing processes, directly extending the bend root can achieve the required 90° angle, but this process is time-consuming and leaves noticeable dents on the product surface due to hammering. Finishing the 30mm opening on the vertical edge of the buttress involves hammering the opening to ensure the required 30mm opening. However, during hammering, the bend of the buttress is subjected to downward force, causing the angle to decrease and the vertical edge to deform, requiring repeated adjustments and corrections. This method is not only inefficient but also prone to causing serious surface defects. Statistics show that finishing a buttress with profile number DQ1142 and a length of 1465mm takes approximately 2.5 to 3 hours, depending on the degree of profile deformation and the operator's skill level. Furthermore, the amount of repair varies and the time required differs for different specifications and models of connecting girder due to the different degrees of deformation. For example, the repair of a connecting girder with profile number DQ1088 and a length of 5500mm takes between 8 and 10 hours.

[0005] Therefore, in traditional stringer trimming processes, operators typically need to spend a significant amount of time and effort manually adjusting the stringer dimensions. Due to the lack of effective tooling, the trimming process often relies heavily on skilled workers using hammers to gradually adjust the stringers. This method is inefficient and easily causes surface damage to the product, thus affecting its appearance quality and service life. Furthermore, the stress concentration caused by repeated hammering may further aggravate stringer deformation, increasing the difficulty of the trimming work.

[0006] Therefore, traditional finishing methods are time-consuming and inefficient, and cannot meet the requirements of modern industry for production efficiency and product quality. Utility Model Content

[0007] In view of the technical problems in the prior art, this utility model provides a docking gantry trimming fixture that can improve production efficiency and product quality.

[0008] A docking truss trimming fixture is used to trim a docking truss. The docking truss cross-section includes a horizontally extending middle section and bent arms extending vertically from both ends of the middle section along a first direction in a mirror-like distribution. Each bent arm includes a first segment connecting the middle section, a second segment extending vertically inward from the end of the first segment, and a third segment extending from the end of the second segment along the first direction. The docking truss trimming fixture includes:

[0009] A trimming mold includes a mating part and an abutting part. The mating part has a rectangular cross-section, and its size matches the space enclosed by the middle part of the docking truss, the two first sections, and the two second sections. The abutting part is formed by the mating part extending along a first direction and its length is greater than that of the third section so that it extends beyond the docking truss in the first direction after mating.

[0010] The clamp is used to hold the outer end face of the middle part and the end face of the abutment part from both sides along the first direction to fix and clamp the connecting truss to prevent the middle part from deforming when the angle between the first section and the middle part is adjusted by hammering the root of the first section.

[0011] Preferably, the abutting portion is wedge-shaped, and its width gradually narrows along the first direction.

[0012] Preferably, the clamp includes a vise for applying clamping force, the vise including a fixed jaw and a movable jaw.

[0013] Preferably, the clamp further includes a pad, which has two parallel surfaces and is placed between the movable jaw and the outer end face of the middle part during trimming. The two parallel surfaces are in contact with the movable jaw and the outer end face of the middle part, respectively.

[0014] Preferably, the length of the pad is greater than the length of the movable jaw and less than the length of the docking truss.

[0015] Preferably, the length of the trimming mold is less than the length of the docking girder.

[0016] Preferably, it also includes an aluminum hammer for striking the first section to adjust the angle between the first section and the middle section.

[0017] Preferably, it also includes a straightening bar, which can be used to vertically place the connecting truss in the clamp after the included angle is adjusted, and insert into the gap between the clamp and the third section, so that the operator can use the straightening bar to straighten the third section.

[0018] Preferably, it also includes a rectangular mold, the cross-sectional dimensions of which match the space enclosed by the middle part of the docking truss, the two first sections, and the two second sections, so as to be placed in the space enclosed by the middle part of the docking truss, the two first sections, and the two second sections during the straightening process.

[0019] Preferably, the docking gantry is a docking gantry used in a rocket fairing.

[0020] Compared with existing technologies, the docking girder trimming fixture provided by this utility model, through the setting of trimming molds and clamps, greatly facilitates operation, enabling rapid and precise trimming of the docking girder. This fixture not only improves trimming efficiency but also significantly reduces surface defects, thereby improving product quality. It effectively solves the problem of dimensional deviations caused by deformation of the girder in its raw material state and after quenching, ensuring the accuracy and performance of the girder. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the planar structure of the trimming mold, clamp, aluminum hammer and the docking gantry in the docking gantry trimming fixture provided in this embodiment of the utility model;

[0023] Figure 2 for Figure 1 The diagram shows the planar structure of the rectangular mold, clamp, straightening bar, and docking truss in the docking truss trimming fixture. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0026] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0027] like Figure 1 , Figure 2 As shown, this embodiment of the invention provides a docking truss trimming fixture for trimming docking truss 1. In this embodiment, docking truss 1 is a docking truss used in a rocket fairing. Of course, in other embodiments, it can also be a docking truss from other products.

[0028] In this embodiment, the cross section of the connecting truss 1 includes a horizontally extending middle part 11 and bent arms that extend vertically from both ends of the middle part 11 along a first direction and are distributed in a mirror pattern. Each bent arm includes a first segment 12 connecting the middle part 11, a second segment 13 extending vertically inward from the end of the first segment 12, and a third segment 14 extending from the end of the second segment 13 along the first direction.

[0029] In this embodiment, the docking gantry trimming fixture includes trimming mold 2 and clamps.

[0030] The trimming mold 2 includes a mating part 21 and an abutting part 22. The mating part 21 has a rectangular cross-section, and its dimensions match the space enclosed by the middle part 11 of the docking truss 1, the two first sections 12, and the two second sections 13. The abutting part 22 is formed by extending the mating part 21 along a first direction, and its length is greater than that of the third section 14 so that it extends beyond the docking truss 1 in the first direction after mating.

[0031] In this embodiment, the abutment portion 22 is wedge-shaped, and its width gradually narrows along the first direction to avoid the third segment 14 of the docking truss 1 and to provide appropriate support for the second segment 13. The length of the trimming mold 2 is less than the length of the docking truss 1 to simplify the structure and save costs. Trimming can be carried out in sections.

[0032] The clamp is used to hold the outer end face of the middle part 11 and the end face of the abutment part 22 from both sides along the first direction, and to fix and clamp the connecting girder 1 to prevent the middle part 11 from deforming when the root of the first section 12 is struck to adjust the angle between the first section 12 and the middle part 11. The aluminum hammer 4 is preferably used to strike the first section 12 to adjust the angle between the first section 12 and the middle part 11.

[0033] In this embodiment, the fixture includes a vise 31 for applying clamping force. The vise 31 includes a fixed jaw 311 and a movable jaw 312. A standard vise 31 is used, which can be easily shared with other production processes. The fixture also includes a pad 32, which has two parallel surfaces. During trimming, it is placed between the movable jaw 312 and the outer end face of the intermediate portion 11, with the two parallel surfaces contacting the movable jaw 312 and the outer end face of the intermediate portion 11, respectively. The pad 32 can better fit with the outer end face of the intermediate portion 11, thus making the fit more precise. The length of the pad 32 is greater than the length of the movable jaw 312 but less than the length of the connecting girder 1, in order to reduce production costs while ensuring a good fit.

[0034] In this embodiment, the docking truss trimming fixture also includes a straightening bar 5. This straightening bar 5 allows the docking truss 1 to be placed vertically in the fixture after the included angle has been trimmed, and is inserted into the gap between the fixture and the third segment 14, so that the operator can use the straightening bar 5 to straighten the third segment 14. Further, in this embodiment, the docking truss trimming fixture also includes a rectangular mold 6. The cross-sectional dimensions of the rectangular mold 6 match the space formed by the middle part 11 of the docking truss 1, the two first segments 12, and the two second segments 13, so that it can be placed within this space during the straightening process. The rectangular mold 6 is used to prevent deformation of other parts of the docking truss 1 during the straightening process. The length of the rectangular mold 6 is greater than the length of the movable jaw 312 and less than the length of the docking truss 1, so as to reduce production costs while ensuring trimming quality.

[0035] The specific process of using this tool for repair is described below.

[0036] The first step involves using a vise 31 to tighten the trimming mold 2, and then inserting the connecting girder 1 into the trimming mold 2. First, the operator needs to place the connecting girder 1 into the trimming mold 2, and then use the vise 31 to secure and tighten the girder to prevent deformation at the bottom during hammering. This process ensures the stability and accuracy of the girder during trimming.

[0037] The second step is to use an aluminum hammer 4 to strike the root of the bent edge of the connecting girder 1, quickly bringing it to a 90° angle (as shown in the image). Figure 1 By using an aluminum hammer 4 to strike the root of the bend in the stringer (i.e., the root of the first section 12, near the middle part 11), the 90° angle of the stringer can be effectively adjusted to meet the design requirements.

[0038] The third step is to use straightening strip 5 to straighten the vertical edge of the connecting girder 1 (i.e., the third section 14) to achieve the purpose of adjusting the opening size by 30mm (e.g., Figure 2 After the angle adjustment is completed, the operator needs to use the straightening bar 5 and the rectangular mold 6 to straighten the vertical edges of the stringer to ensure the accuracy of the opening size.

[0039] This tooling can efficiently and accurately complete the trimming of docking trusses. Actual operation shows that trimming a docking truss of profile DQ1142 with a length of 1465mm takes approximately one hour, while trimming a docking truss of model DQ1088 with a length of 5500mm takes only about 5 to 6 hours. Trimming efficiency is increased by 150% to 200%. This new trimming technology not only significantly enhances work efficiency but also greatly reduces the incidence of surface defects, thereby improving product quality. Furthermore, this tooling and method are simple to operate and easy to learn, making them particularly suitable for promotion and application in production environments.

[0040] The above are merely embodiments of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A tooling for trimming a docking truss, wherein the docking truss cross-section includes a horizontally extending middle section and bent arms extending vertically from both ends of the middle section along a first direction in a mirror-like distribution, each bent arm including a first segment connecting the middle section, a second segment extending vertically inward from the end of the first segment, and a third segment extending from the end of the second segment along the first direction, characterized in that... The docking truss trimming fixture includes: A trimming mold includes a mating part and an abutting part. The mating part has a rectangular cross-section, and its size matches the space enclosed by the middle part of the docking truss, the two first sections, and the two second sections. The abutting part is formed by the mating part extending along a first direction and its length is greater than that of the third section so that it extends beyond the docking truss in the first direction after mating. The clamp is used to hold the outer end face of the middle part and the end face of the abutment part from both sides along the first direction to fix and clamp the connecting truss to prevent the middle part from deforming when the angle between the first section and the middle part is adjusted by hammering the root of the first section.

2. The docking truss trimming fixture according to claim 1, characterized in that, The abutting portion is wedge-shaped, and its width gradually narrows along the first direction.

3. The docking truss trimming fixture according to claim 1, characterized in that, The clamp includes a vise for applying clamping force, the vise including a fixed jaw and a movable jaw.

4. The docking truss trimming fixture according to claim 3, characterized in that, The clamp also includes a pad, which has two parallel surfaces. During trimming, the pad is placed between the movable jaw and the outer end face of the middle part, and the two parallel surfaces are in contact with the movable jaw and the outer end face of the middle part, respectively.

5. The docking truss trimming fixture according to claim 4, characterized in that, The length of the pad is greater than the length of the movable jaw and less than the length of the docking truss.

6. The docking truss trimming fixture according to claim 1, characterized in that, The length of the trimming mold is less than the length of the docking truss.

7. The docking truss trimming fixture according to claim 1, characterized in that, It also includes an aluminum hammer used to strike the first section and adjust the angle between the first section and the middle section.

8. The docking truss trimming fixture according to claim 1, characterized in that, It also includes a straightening bar, which, after the included angle is adjusted, allows the connecting truss to be placed vertically in the fixture and inserted into the gap between the fixture and the third section, so that the operator can use the straightening bar to straighten the third section.

9. The docking truss trimming fixture according to claim 8, characterized in that, It also includes a rectangular mold, the cross-sectional dimensions of which match the space enclosed by the middle part of the docking truss, the two first sections, and the two second sections, so that it can be placed in the space enclosed by the middle part of the docking truss, the two first sections, and the two second sections during the straightening process.

10. The docking truss trimming fixture according to any one of claims 1 to 9, characterized in that, The docking gantry is used in the rocket fairing.

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