Universal positioner for curved section and design method thereof

Abstract

The application belongs to the technical field of process equipment, and relates to a general positioning device for curved section bars and a design method thereof. The structure of the section bar is analyzed to obtain a control element of a positioning surface of the section bar, that is, a curved surface of a vertical rib of the section bar. The curvature change of the curved surface of the vertical rib of the section bar is judged. If the curvature change is within a certain range, the curved surface of the vertical rib of the section bar is decomposed into two linear control elements, that is, a longitudinal axis of the section bar and a vertical rib axis of the section bar. The two linear control elements of the section bar are taken as positioning control bases of the positioning device. The positioning control elements of the positioning device include a positioning hole connecting line, a positioning surface and an included angle alpha between the positioning surface and a limiting adhering surface. The arrangement positions of the positioning holes on a clamping plate are determined according to the positioning control elements of the positioning device. The positioning device for the curved section bars with the same structure and similar sizes can solve the error prevention problems in the manufacturing, installation and use processes, and can greatly reduce the manufacturing, use and maintenance costs.

Description

Technical Field

[0001] This invention belongs to the field of process equipment technology and relates to a universal positioner for curved profiles and its design method. Background Technology

[0002] In the vertical and horizontal stabilizer components of a certain type of aircraft, curved T-shaped angle brackets require positioning. To ensure the accurate positioning of these curved T-shaped angle brackets during component assembly, curved T-shaped angle bracket locators are needed in the process equipment. In the assembly jig, the curved T-shaped angle brackets need to be positioned at different rib locations. Because the positioning surface of the profile is curved, the curved profile locators are generally specially designed and manufactured. Therefore, the tooling contains many curved T-shaped angle bracket locators with similar structures and dimensions. The positioning surfaces of these locators are generally also designed as curved surfaces and require CNC machining. In this case, due to the large size of the curved profile, several locators with slightly different shapes are generally required along the length to work together to achieve positioning. The manufacturing, installation, and use of curved T-shaped angle bracket locators suffer from high manufacturing costs and are not conducive to error prevention during manufacturing and use. If the special curved T-shaped angle bracket locators used in various positions could be universally designed, the above defects could be effectively avoided. Therefore, it is necessary to invent a universal curved profile locator and its design method to solve these defects. Summary of the Invention

[0003] 1. Technical problems to be solved

[0004] This invention overcomes the shortcomings of existing technologies and provides a universal locator for curved profiles and its design method. This invention addresses the need for universal design of locators for curved profiles with similar structures and dimensions in process equipment. It not only solves the problem of preventing errors during the manufacturing, installation, and use of a large number of locators for curved profiles with similar structures and dimensions, but also greatly reduces their manufacturing, use, and maintenance costs.

[0005] 2. Technical Solution

[0006] This invention proposes a design method for a universal locator for curved profiles, the design method comprising the following steps:

[0007] Step S1: Analyze the structure of the profile to obtain the control elements of the profile positioning surface, namely the profile vertical rib curved surface;

[0008] Step S2: Determine the curvature change of the profile vertical rib surface. If the curvature change is within a certain range, decompose the profile vertical rib surface into two linear control elements, namely the profile longitudinal axis and the profile vertical rib axis.

[0009] Step S3: Use the two linear control elements of the profile as the positioning control basis of the positioner. The positioning control elements of the positioner include the positioning hole connection line, the positioning surface, and the included angle α between the positioning surface and the limiting contact surface. Among them, the profile vertical rib axis is parallel to the positioning hole connection line of the positioner; the positioning surface of the positioner is parallel to the profile vertical rib axis of the curved profile; the positioning surface is a plane; the included angle α is determined by the included angle between the curved profile and the plate plane.

[0010] Step S4: Determine the arrangement position of the positioning holes on the card plate according to the positioning control elements of the positioner.

[0011] Furthermore, the positioning control elements of the positioner also include the distance between the line connecting the positioning holes of the positioner and the positioning surface. This distance must ensure that the positioner does not interfere with the profile to be positioned or the auxiliary structures on the card plate.

[0012] Furthermore, in step S2, the longitudinal axis of the profile is a straight line or approximately a straight line.

[0013] Furthermore, in step S3, when the positioning surface is a plane, its positioning deviation should not exceed 0.1mm.

[0014] In another aspect, the present invention also proposes a universal locator for positioning curved profiles, the locator comprising a positioning surface, a connecting plate, a first positioning circular hole, a second positioning circular hole, a limiting fitting surface, and a locator α angle;

[0015] The positioner is positioned and connected by a threaded pin assembly through two positioning holes and a limiting contact surface on the connecting plate and two positioning holes and a contact surface on the clamping plate. The positioning surface of the positioner is clamped to fit the curved surface of the profile rib by a hook clamp. The α angle of the positioner is determined by the angle between the curved profile and the plane of the clamping plate.

[0016] Furthermore, the positioner is also provided with an auxiliary reference hole, which serves as a reference hole for the positioner's processing and testing.

[0017] Furthermore, one of the two positioning holes on the connecting plate is an oblong hole, and the other is a round hole; the oblong hole design facilitates the installation of the positioner.

[0018] 3. Beneficial technical effects

[0019] This invention provides a universal locator for curved profiles and its design method. By standardizing the design of the profile locator, this invention optimizes the structural elements of various curved profile locators with similar dimensions and identical structures, achieving the goal of using a single locator size to meet the needs of all positions. This significantly improves the interchangeability of the locator and eliminates potential errors during manufacturing, use, and maintenance. Optimized design of the locating surface reduces the requirements for processing equipment, allowing the use of non-CNC machine tools to meet the design accuracy requirements. This invention greatly reduces the manufacturing, installation, and maintenance costs of locators when multiple curved profile locators are needed in the process equipment, and eliminates potential errors and related product quality issues during manufacturing, use, and maintenance. Attached Figure Description

[0020] This invention includes 5 figures, and the figures and their descriptions are as follows:

[0021] Figure 1 This is a schematic diagram showing the working state of a universal locator for curved profiles.

[0022] Figure 2 The structural intent of a universal locator for curved profiles;

[0023] Figure 3 This is a schematic diagram of the card plate structure;

[0024] Figure 4 This is a schematic diagram of a curved profile structure.

[0025] Among them: 1-Universal locator for curved profiles, 2-Clamping plate, 3-Threaded pin assembly, 4-Hook fastener, 5-Curved profile, 11-Location surface, 12-Connecting plate, 13-Location round hole, 14-Location oblong hole, 15-Auxiliary reference hole, 16-Limiting mating surface, 17-Through hole, 18-Location hole connection line, 19-Location locator α angle, 21-Location round hole one, 22-Location round hole two, 23-Location axis, 24-Mating surface, 51-Profile longitudinal axis, 52-Profile vertical rib axis, 53-Profile vertical rib curved surface. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings:

[0027] This invention provides a universal positioner for curved profiles and its design method. The working state of positioner 1 when positioning curved profile 5 is as follows: Figure 1As shown. In the process equipment, the positioner 1 is positioned and connected by a threaded pin assembly 3 through the positioning round hole 13, the positioning elongated hole 14, the limiting contact surface 16 on the connecting plate 12, and the positioning round hole 21, the positioning round hole 22, and the contact surface 24 on the clamping plate 2. The positioning surface 11 of the positioner 1 is made to fit and clamp the profile vertical rib curved surface 53 of the curved profile 5 through the hook clamping device 4. The positioning and clamping of the curved profile 5 in the tooling is completed by the combination of multiple sets of universal curved profile positioners 1 and clamping plates. When designing the positioner 1 for universality, the structural elements of the curved profile 5, the profile longitudinal axis 51 and the profile vertical rib axis 52, should be analyzed. If the longitudinal axis 51 is approximately straight and the angle change of the profile vertical rib axis 52 is small, the universal design of the positioner 1 can be realized.

[0028] The structure of positioner 1 is as follows Figure 2 As shown, its structure should include a positioning surface 11, a connecting plate 12, a positioning circular hole 13, a positioning oblong hole 14, and an auxiliary reference hole 15. In the structural design, the line 18 connecting the positioning holes of the locator 1 and the positioning surface 11 should be parallel to the axis 52 of the profile rib of the curved profile 5, and the positioning surface 11 of the locator 1 should be parallel to the axis 52 of the profile rib of the curved profile 5. The positioning surface 11 and the limiting contact surface 16 form the locator angle α 19. The angle between the curved profile 5 and the plane of the clamping plate is equal to the locator angle α 19. The structure of the clamping plate 2 is as follows... Figure 3 As shown, its constituent elements should include: positioning hole 1 21, positioning hole 22, and mating surface 24. In the design of the clamping plate 2, the positioning axis 23 of the clamping plate 2 is made parallel to the profile rib axis 52 of the curved profile 5. For different clamping plates, by adjusting the positions of positioning holes 1 21 and 22 on the positioning axis 23 of the clamping plate 2, the positioning requirements of the curved profile 5 at this location are met, thus completing the universal design of the positioner 1.

[0029] A universal positioner for curved profiles and its design method. The working state of the positioner is as follows: Figure 1 As shown, its components include: a universal locator for curved profiles 1, a clamping plate 2, a threaded pin assembly 3, a hook fastener 4, and a curved profile 5. The structure of the locator 1 is as follows: Figure 2 As shown, its constituent elements include: positioning surface 11, connecting plate 12, positioning circular hole 13, positioning oblong hole 14, auxiliary reference hole 15, limiting contact surface 16, through hole 17, positioning hole connecting line 18, and positioner angle α 19. The structure of the card plate 2 is as follows: Figure 3 As shown, its constituent elements include: positioning circular hole 1 21, positioning circular hole 22, positioning axis 23, and mating surface 24. The structure of the curved profile 5 is as follows: Figure 4 As shown, its constituent elements include: profile longitudinal axis 51, profile vertical rib axis 52, and profile vertical rib curved surface 53.

[0030] When the curved profile 5 is positioned in the process equipment, the positioning surface 11 of the positioner 1 is clamped to the profile vertical rib curved surface 53 of the curved profile 5 by the hook clamp 4; the positioner 1 is positioned and connected by the threaded pin assembly 3 through the positioning round hole 13, positioning elongated round hole 14, limiting contact surface 16 on the connecting plate 12 and the positioning round hole 21, positioning round hole 22, and contact surface 24 on the clamping plate 2.

[0031] The positioning requirement of the curved profile 5 for the positioner 1 is to control the longitudinal axis 51 and the vertical rib axis 52 of its constituent elements. When the longitudinal axis 51 of the curved profile 5 is approximately straight and the angle change of the vertical rib axis 52 is small, the positioner 1 can be designed to be universal.

[0032] The curvature of the curved profile 5 in all directions is usually very small. Within the contact range between the positioning surface 11 of the locator 1 and the profile rib curved surface 53 of the curved profile 5, the change of its profile is very small and can be regarded as a plane. Therefore, in the generalized design of the locator, the positioning surface of the locator is designed as a plane.

[0033] In the design of positioner 1, the positioning hole connection line 18 and positioning surface 11 of positioner 1 are parallel to the profile rib axis 52 of curved profile 5, and the positioning surface 11 of positioner 1 is parallel to the profile rib axis 52 of curved profile 5. In the design of clamping plate 2, the positioning axis 23 of clamping plate 2 is parallel to the profile rib axis 52 of curved profile 5. In this way, when the same positioner is used on different clamping plates, the positioning requirements of curved profile 5 at this location can be met by adjusting the positions of positioning holes 21 and 22 on the positioning axis 23 of clamping plate 2, thus realizing the universal design of positioner 1.

[0034] The above specific embodiments or examples are only used to explain the technical solutions of the present invention and are not intended to limit the present application. Parts not described in detail are considered as conventional technical means in the art. Those skilled in the art should understand that, based on the design concept of the present application, it is possible to make adaptive modifications to the technical solutions described in the foregoing embodiments or to make equivalent substitutions for some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A design method for a universal locator for curved profiles, characterized in that, The design method includes the following steps: Step S1: Analyze the structure of the profile to obtain the control elements of the profile positioning surface, namely the profile vertical rib curved surface; Step S2: Determine the curvature change of the profile vertical rib surface. If the curvature change is within a certain range, decompose the profile vertical rib surface into two linear control elements, namely the profile longitudinal axis and the profile vertical rib axis. Step S3: Use the two linear control elements of the profile as the positioning control basis of the positioner. The positioning control elements of the positioner include the positioning hole connection line, the positioning surface, and the included angle α between the positioning surface and the limiting contact surface. Among them, the profile vertical rib axis is parallel to the positioning hole connection line of the positioner; the positioning surface of the positioner is parallel to the profile vertical rib axis of the curved profile; the positioning surface is a plane; the included angle α is determined by the included angle between the curved profile and the plate plane. Step S4: Determine the arrangement position of the positioning holes on the card plate according to the positioning control elements of the positioner.

2. The design method for a universal locator for curved profiles as described in claim 1, characterized in that, The positioning control elements of the positioner also include the distance between the line connecting the positioning holes of the positioner and the positioning surface. This distance must ensure that the positioner does not interfere with the profile to be positioned or the auxiliary structures on the card plate.

3. The design method for a universal locator for curved profiles as described in claim 1, characterized in that, In step S2, the longitudinal axis of the profile is a straight line or approximately a straight line.

4. The design method for a universal locator for curved profiles as described in claim 1, characterized in that, In step S3, when the positioning surface is a plane, its positioning deviation should not exceed 0.1mm.

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