A high-precision three-dimensional double-curved surface arc rod piece inspection jig

Abstract

The utility model discloses a high accuracy three -dimensional double curved surface arc rod piece inspection fixture relates to inspection fixture technical field, including bottom plate and positioning hole, the inside both sides of bottom plate are equipped with mounting hole, and the inside fixed mounting of mounting hole has the inspection fixed base through the positioning pin and the hexagon bolt, the inspection fixed base is provided with two groups, a group the top of inspection fixed base is equipped with arc rod piece no.

Description

Technical Field

[0001] This utility model relates to the field of inspection fixture technology, specifically a high-precision three-dimensional hyperboloid arc rod inspection fixture. Background Technology

[0002] Bus frame production typically involves creating a curvature gauge for the entire body surface, then manufacturing the necessary arc rods based on the template, and finally assembling them together to complete the entire frame production.

[0003] Currently, most of the templates used for producing curved rods are single-sided projection templates. These templates may be usable for making single-sided curved products, but when making hyperbolic curved rods, due to the spatial structure, often after one arc is successfully adjusted, the other arc deforms. Simple projection templates cannot intuitively and effectively observe the degree of change, making it difficult to complete large-scale work quickly and efficiently. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision three-dimensional hyperboloid arc rod inspection fixture to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-precision three-dimensional hyperboloid arc rod inspection fixture, comprising a base plate and positioning holes. The base plate has mounting holes on both sides inside, and an inspection fixing seat is fixedly installed inside the mounting holes by positioning pins and hexagonal bolts. The inspection fixing seat is provided in two sets. One set of the inspection fixing seat has an arc rod first installed on its top, and the other set of the inspection fixing seat has an arc rod second installed on its top. The positioning holes are located in the middle of the base plate.

[0006] Furthermore, the inspection fixture has mounting holes on both sides inside, and the top width of the inspection fixture is smaller than the bottom width of the inspection fixture.

[0007] Furthermore, the base plate has a rectangular structure, and the inspection fixing seat is located on the outer surface of the base plate.

[0008] Furthermore, the inspection fixing seats are evenly distributed about the outer surface of the base plate, and there are two arc rods: arc rod one and arc rod two.

[0009] Furthermore, the shape and structure of the top side of the inspection fixture matches the outer shape and structure of either arc rod one or arc rod two.

[0010] This utility model provides a high-precision three-dimensional hyperboloid arc rod inspection fixture, which has the following beneficial effects: 1. This utility model has comprehensive detection positions, is easy to use, and can be placed directly, improving the product curvature accuracy and production efficiency. It can also be directly positioned using a pre-adjusted inspection fixture, eliminating the need for manual measurement. Especially in batch production, it saves time and labor while ensuring accuracy.

[0011] 2. This utility model, through the design of the shape and structure of the inspection fixing seat and the design of the mounting holes in the base plate, facilitates the fixing of the inspection fixing seat to the base plate, making installation and disassembly convenient and facilitating quick verification of arc rod component one and arc rod component two. The structure is simple and easy for users to operate quickly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a high-precision three-dimensional hyperboloid arc rod inspection fixture according to the present invention; Figure 2 This is a top view of the base plate structure of a high-precision three-dimensional hyperboloid arc rod inspection fixture according to this utility model; Figure 3 This is a side view of the base plate structure of a high-precision three-dimensional hyperboloid arc rod inspection fixture according to the present invention; Figure 4 This is a bottom view of the structure of a high-precision three-dimensional hyperboloid arc rod inspection fixture according to the present invention. Figure 5 This utility model relates to a high-precision three-dimensional hyperboloid arc rod inspection fixture. Figure 1 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the feeler gauge structure of a high-precision three-dimensional hyperboloid arc rod inspection fixture according to the present invention; Figure 7 This is a schematic diagram of the surface difference meter structure of a high-precision three-dimensional hyperboloid arc rod inspection fixture according to this utility model.

[0013] In the diagram: 1. Base plate; 2. Positioning hole; 3. Arc rod component one; 4. Arc rod component two; 5. Inspection fixing seat; 6. Mounting hole; 7. Assembly hole. Detailed Implementation

[0014] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0015] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, a high-precision three-dimensional hyperboloid arc rod inspection fixture includes a base plate 1, positioning holes 2, arc rod one 3, arc rod two 4, inspection fixing seat 5, mounting holes 6, and mating holes 7. The base plate 1 has mounting holes 6 on both sides, and the inspection fixing seat 5 is fixedly installed inside the mounting holes 6 by positioning pins and hexagonal bolts. The inspection fixing seats 5 are evenly distributed about the outer surface of the base plate 1. The base plate 1 has a rectangular structure, with the arc rod one 3 and arc rod two 4 located on the outer surface of the base plate 1. The design of the shape and structure of the inspection fixing seat 5, as well as the design of the mounting holes 6 in the base plate 1, facilitates the fixing of the inspection fixing seat 5 about the base plate 1, making installation and disassembly convenient and allowing for quick verification of the arc rod one 3 and arc rod two 4. The structure is simple and allows for quick operation by the user.

[0016] like Figure 3 , Figure 6 and Figure 7 As shown, two sets of inspection fixtures 5 are provided. The shape and structure of one side of the top of the inspection fixture 5 matches the outer shape and structure of either arc rod 3 or arc rod 4. The two sides of the interior of the inspection fixture 5 are provided with mounting holes 7, and the top width of the inspection fixture 5 is smaller than the bottom width. This width structure design of the inspection fixture 5 ensures greater stability when verifying arc rod 3 and arc rod 4. One set of inspection fixtures 5 has arc rod 3 mounted on its top, and the other set has arc rod 4 mounted on its top. The positioning hole 2 is located in the middle of the base plate 1. All inspection fixtures 5 are CNC machined, and to achieve maximum precision, the tolerance of the inspection contact surface of the inspection fixture 5 is controlled within ±0.05mm. The base plate 1 is a 20mm thick solid plate, planed to a surface flatness of ±0.1, and then CNC-milled with holes. The tolerance of all hole positions is controlled within ±0.05mm. After each component is processed, it is inspected using a coordinate measuring machine to ensure that all components are qualified. Then, the inspection fixture 5 is positioned on the base plate 1 in sequence according to its number using positioning pins and pre-locked with bolts. Each inspection surface is inspected again using a coordinate measuring machine to control the tolerance within ±0.2. If any part exceeds this range, the inspection fixture 5 is reprocessed or replaced until the entire fixture passes the coordinate measuring machine inspection. In addition, when the arc rod 1 3 and arc rod 2 4 are placed on the inspection fixture 5, their X-axis and Y-axis directions are flush with the inspection fixture 5, and their Z-axis direction is in contact with the inspection fixture 5. Finally, when using the fixture, the finished product is placed on the inspection fixture 5 and observed with the naked eye. The dimensions in the XY-axis direction are checked with a surface difference meter, and the Z-axis direction is checked with a feeler gauge. The deviation values ​​of the manufactured arc rod 1 3 and arc rod 2 4 from the theoretical values ​​can be obtained intuitively. When the deviation value is greater than the technical requirements, the arc rod 1 3 and arc rod 2 4 are reworked and corrected.

[0017] In summary, this high-precision three-dimensional hyperboloid arc rod inspection fixture is first based on... Figures 1-7In the structure shown, all inspection fixtures 5 are CNC machined during use. To achieve maximum precision, the tolerance of the inspection contact surface of each inspection fixture 5 is controlled within ±0.05mm. The base plate 1 is a 20mm thick solid plate, planed to a surface flatness of ±0.1mm, and then CNC-machined with milled holes. The tolerance of all holes is controlled within ±0.05mm. After each component is machined, it is inspected using a coordinate measuring machine to ensure that all components are qualified. Then, the inspection fixtures 5 are positioned sequentially according to their numbers using locating pins. Pre-tighten the bolts on the base plate 1, and then use a coordinate measuring machine to check each inspection surface again to ensure that the tolerance is controlled within ±0.2. If any part exceeds this range, re-machine or replace the inspection fixture 5 until the entire fixture passes the coordinate measuring machine test. In addition, when the arc rod 1 3 and arc rod 2 4 are placed on the inspection fixture 5, their X-axis and Y-axis directions should be flush with the inspection fixture 5, and their Z-axis direction should be in contact with the inspection fixture 5. Finally, when using the fixture, place the finished product on the inspection fixture 5 and observe it with the naked eye, and use a surface difference meter for reference. Figure 7 The dimensions in the XY axis directions are measured using a feeler gauge as a reference. Figure 6 By inspecting the Z-axis direction, the deviation values ​​between the manufactured arc member 3 and arc member 4 and the theoretical values ​​can be obtained intuitively. When the deviation value is greater than the technical requirements, arc member 3 and arc member 4 need to be reworked and corrected.

[0018] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A high-precision three-dimensional hyperboloid arc rod inspection fixture, comprising a base plate (1) and positioning holes (2), characterized in that, The base plate (1) has mounting holes (6) on both sides inside, and an inspection fixing seat (5) is fixedly installed inside the mounting holes (6) by positioning pins and hexagonal bolts. There are two sets of inspection fixing seats (5). One set of inspection fixing seats (5) has an arc rod component one (3) installed on the top, and the other set of inspection fixing seats (5) has an arc rod component two (4) installed on the top. The positioning hole (2) is opened in the middle of the base plate (1).

2. The high-precision three-dimensional hyperboloid arc rod inspection fixture according to claim 1, characterized in that, The inspection fixture (5) has mounting holes (7) on both sides inside, and the top width of the inspection fixture (5) is smaller than the bottom width of the inspection fixture (5).

3. The high-precision three-dimensional hyperboloid arc rod inspection fixture according to claim 1, characterized in that, The base plate (1) has a rectangular structure, and the inspection fixing seat (5) is located on the outer surface of the base plate (1).

4. The high-precision three-dimensional hyperboloid arc rod inspection fixture according to claim 1, characterized in that, The inspection fixing seat (5) is distributed at equal distances with respect to the outer surface of the base plate (1), and the arc rod one (3) and the arc rod two (4).

5. A high-precision three-dimensional hyperboloid arc rod inspection fixture according to claim 1, characterized in that, The top side shape of the inspection fixture (5) matches the outer shape of either arc member one (3) or arc member two (4).

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