A device for measuring the spatial dimensions of complex curved surface parts

Abstract

The application discloses a device for measuring the space size of a complex curved surface part, which comprises a handheld part, a fixed measuring structure and a moving measuring structure arranged at two ends of the handheld part respectively, the fixed measuring structure and the moving measuring structure each comprise a universal clamping structure detachably connected to the end of the handheld part, the fixed measuring structure is provided with a first telescopic measuring rod through the universal clamping structure, and the universal clamping structure of the moving measuring structure is provided with a spherical probe dial gauge. According to the span of the space size or the curved surface to be measured, the universal clamping structures of the fixed measuring structure and the moving measuring structure are adjusted, the first telescopic measuring rod of the fixed measuring structure is placed on a reference point of the part to be measured, the spherical probe dial gauge is placed on a point to be measured of the part to be measured, a dial reading is read, a straight line distance between two points is obtained, and the machining precision of the point to be measured can be quickly and accurately judged according to the straight line distance.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical manufacturing testing technology, specifically relating to a device for measuring the spatial dimensions of complex curved surface parts. Background Technology

[0002] In modern manufacturing industries such as aerospace, automotive manufacturing, precision mold making, and customized products, there are numerous non-standard and complex curved surface components. These components have irregular shapes, numerous characteristic dimensions, and lack a unified benchmark. Accurate measurement is crucial for ensuring product quality and performing assembly verification. Currently, non-standard dimensions are measured using contact measurement methods, two-dimensional image measurement methods, and non-contact three-dimensional scanning methods. However, the coordinate measuring machine (CMM) method used in existing technologies suffers from high accuracy but low efficiency. While image measurement is fast, it requires a high-precision benchmark. Three-dimensional scanning technology is susceptible to interference and has complex data processing, making it unsuitable for accurately measuring the dimensions of non-standard components during manufacturing.

[0003] In the prior art, although the utility model with publication number CN220398524U involves thickness measurement, its structure is complex and its operation is cumbersome. It is not suitable for measuring the dimensions of non-standard parts and it is difficult to quickly, accurately and on-machine measure the spatial dimensions of any two points on a curved surface or the feature dimensions relative to a local reference.

[0004] Therefore, this application anticipates an apparatus for measuring the spatial dimensions or characteristic dimensions of non-standard components relative to a local reference. Utility Model Content

[0005] In order to overcome the technical problem in the prior art that it is difficult to quickly, accurately and on-machine measure the spatial dimensions of any two points on the curved surface or the characteristic dimensions relative to the local reference during the processing and manufacturing of non-standard parts with irregular shapes and no unified assembly reference, this utility model provides a device for measuring the spatial dimensions of complex curved surface parts.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A device for measuring the spatial dimensions of complex curved surface parts includes a handheld part, and a fixed measuring structure and a movable measuring structure respectively disposed at both ends of the handheld part. The fixed measuring structure and the movable measuring structure each include a universal clamping structure detachably connected to the end of the handheld part. The fixed measuring structure is provided with a first telescopic measuring rod through the universal clamping structure, and the movable measuring structure is provided with a spherical dial indicator through the universal clamping structure.

[0008] Furthermore, both ends of the handheld part are provided with bases;

[0009] The universal clamping structure includes a universal ball joint that is detachably connected to the base, and a clamping component. One end of the clamping component clamps the universal ball joint, and the other end is provided with a first telescopic measuring rod or a ball-shaped measuring head dial indicator.

[0010] Furthermore, one end of the universal ball head is a screw, and the other end is a ball structure. The screw is threadedly connected to the base, and the ball structure is connected to the clamping component.

[0011] Furthermore, the clamping member includes a first clamping plate, a second clamping plate, and a locking bolt, wherein the locking bolt is... positive and negative Threaded rod ;

[0012] Both the first clamping plate and the second clamping plate have a spherical snap-fit ​​cavity near one end for snapping the universal ball joint.

[0013] The other end of the first clamping plate and the second clamping plate are provided with rod-shaped clamping cavities for clamping the first telescopic measuring rod, or a spherical measuring head dial indicator is provided through the other end of the first clamping plate and the second clamping plate.

[0014] Furthermore, the spherical probe dial indicator includes a dial indicator and a ball probe, with a second telescopic probe disposed between the dial indicator and the ball probe;

[0015] The second telescopic measuring rod is interference-fitted into the sleeve, which passes through the first clamping plate and the second clamping plate in sequence. The outer wall of the sleeve has a variable diameter structure. One end of the sleeve is interference-fitted with the first clamping plate or the second clamping plate close to the dial indicator, and the other end is gap-fitted with the first clamping plate or the second clamping plate far away from the dial indicator.

[0016] The beneficial effects of this utility model are:

[0017] This application discloses a device for measuring the spatial dimensions of complex curved surface parts, including a handheld unit and a fixed measuring structure and a movable measuring structure respectively disposed at both ends of the handheld unit. Both the fixed and movable measuring structures include a universal clamping structure detachably connected to the end of the handheld unit. The fixed measuring structure has a first telescopic measuring rod disposed via the universal clamping structure, and the movable measuring structure has a spherical dial indicator disposed via the universal clamping structure. This application adjusts the universal clamping structures of the fixed and movable measuring structures according to the spatial dimensions or the span of the curved surface to be measured. The first telescopic measuring rod of the fixed measuring structure is placed on a reference point of the part to be measured, and the spherical dial indicator is placed on the measurement point of the part. The dial indicator reading is read to obtain the straight-line distance between the two points. Based on the straight-line distance, the machining accuracy of the measurement point can be quickly and accurately determined. The handheld unit is flexible and convenient, especially for small measurement spaces, facilitating rapid testing by those skilled in the art. Attached Figure Description

[0018] Figure 1A perspective view of the apparatus according to an embodiment of the present disclosure is shown;

[0019] Figure 2 A top view of an apparatus according to an embodiment of the present disclosure is shown;

[0020] Figure 3 A side view of an apparatus according to an embodiment of the present disclosure is shown.

[0021] In the figure, 1-handheld part; 2-base; 3-clamping part; 4-universal ball joint; 5-first clamping plate; 6-second clamping plate; 7-locking bolt; 9-first telescopic measuring rod; 10-ball head probe; 11-second telescopic measuring rod; 12-sleeve; 13-dial indicator. Detailed Implementation

[0022] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] Figure 1 , Figure 2 and Figure 3 A perspective view, a top view, and a side view of the device according to an embodiment of this disclosure are shown respectively, as follows: Figure 1 , Figure 2 and Figure 3 As shown, the device includes a handheld part 1, and a fixed measuring structure and a movable measuring structure respectively disposed at both ends of the handheld part 1. Both the fixed measuring structure and the movable measuring structure include a universal clamping structure detachably connected to the end of the handheld part 1. The fixed measuring structure is provided with a first telescopic measuring rod 9 through the universal clamping structure, and the movable measuring structure is provided with a spherical probe dial indicator through the universal clamping structure.

[0024] Specifically, the handheld part 1 has a U-shaped structure, and both ends of the handheld part 1 are provided with bases 2, which are arranged in parallel. The universal clamping structure includes a universal ball head 4 detachably connected to the base 2, and a clamping member 3. One end of the clamping member 3 clamps the universal ball head 4, and the other end is provided with a first telescopic measuring rod 9 or a ball-shaped measuring head dial indicator.

[0025] More specifically, one end of the universal ball head 4 is a screw and the other end is a ball structure. The screw is threaded to the base 2, and the ball structure is connected to the clamping member 3.

[0026] Furthermore, the clamping member 3 includes a first clamping plate 5, a second clamping plate 6, and a locking bolt 7, wherein the locking bolt 7 is... Forward and reverse threaded rodsUnderstandably, when the locking bolt 7 is rotated in a certain direction, the first clamping plate 5 and the second clamping plate 6 move closer or further apart. When they move closer, the universal ball head 4 is locked and forms a specific angle with the universal ball head 4. Then, the fastening nut is screwed into the first clamping plate 5 and the second clamping plate 6 on the far side to achieve locking. When they move away, the angle with the universal ball head 4 can be manually adjusted to form a specific shape that can measure spatial dimensions.

[0027] One end of the first clamping plate 5 and the second clamping plate 6 near the side is provided with a spherical snap-fit ​​cavity for snapping the universal ball head 4;

[0028] The other end of the first clamping plate 5 and the second clamping plate 6 of the universal clamping structure located on the fixed measuring structure side are provided with rod-shaped clamping cavities for clamping the first telescopic measuring rod 9. The other end of the first clamping plate 5 and the second clamping plate 6 of the universal clamping structure located on the movable measuring structure side is provided with a spherical probe dial indicator.

[0029] Specifically, the spherical probe dial indicator includes a dial indicator 13 and a ball probe 10, with a second telescopic probe 11 disposed between the dial indicator 13 and the ball probe 10;

[0030] The second telescopic measuring rod 11 is interference-fitted into the sleeve 12. The sleeve 12 passes through the first clamping plate 5 and the second clamping plate 6 in sequence. The outer wall of the sleeve 12 has a variable diameter structure. One end of the sleeve 12 is interference-fitted with the first clamping plate 5 or the second clamping plate 6 near the dial indicator 13, and the other end is loosely fitted with the first clamping plate 5 or the second clamping plate 6 away from the dial indicator 13. It should be noted that in this embodiment, the first clamping plate 5 and the second clamping plate 6 are always in a parallel state. When one end of the sleeve 12 is interference-fitted, the other end will not interfere with other clamping plates. This can prevent structural interference when adjusting the relative angle between the universal ball head 4 and the clamping member 3.

[0031] In use, this invention is applicable to both the thickness measurement of thin-walled curved surface structures and the spatial dimension measurement of irregularly shaped structures. When measuring spatial dimensions, it includes:

[0032] Take a standard gauge block or a standard part with known precise dimensions and place it between the first telescopic measuring rod 9 and the ball head probe 10. Adjust the universal clamping structure to ensure that the initial reference of the measurement system is accurate. Gently press the dial indicator 13 to bring the pointer to zero and complete the calibration.

[0033] According to the process requirements, a stable and reliable feature on the workpiece is selected, such as a machined plane, a process boss, or a relatively flat area on a large curved surface, as the "local reference" for this measurement. The universal clamping structure of the fixed measuring structure is adjusted so that the first telescopic measuring rod 9 is tightly and stably attached to the local reference, thus completing the establishment of the measurement coordinate system.

[0034] Keep the handheld part stable and adjust the universal clamping structure of the moving measuring structure so that the ball probe 10 contacts the target point on the surface to be measured in the normal direction. The reading of dial indicator 13 is the contour dimension of that point relative to the established local reference. Multiple key surface points of the surface can be quickly measured before or after machining or between processes to monitor machining allowances or the final contour.

[0035] The data is compared with the theoretical spatial coordinates or dimensions on the 3D digital model or process drawings. If a deviation is found, it is fed back to the machining center to adjust the toolpath or machining parameters, achieving precise manufacturing based on real-time measurement data.

Claims

1. A device for measuring the spatial dimensions of complex curved surface parts, characterized in that, It includes a handheld part (1) and a fixed measuring structure and a movable measuring structure respectively disposed at both ends of the handheld part (1). The fixed measuring structure and the movable measuring structure each include a universal clamping structure detachably connected to the end of the handheld part (1). The fixed measuring structure is provided with a first telescopic measuring rod (9) through the universal clamping structure, and the movable measuring structure is provided with a spherical measuring head dial indicator through the universal clamping structure.

2. The apparatus for measuring the spatial dimensions of complex curved surface parts according to claim 1, characterized in that, Both ends of the handheld part (1) are provided with bases (2); The universal clamping structure includes a universal ball head (4) that is detachably connected to the base (2), and a clamping member (3). One end of the clamping member (3) clamps the universal ball head (4), and the other end is provided with a first telescopic measuring rod (9) or a spherical measuring head dial indicator.

3. The apparatus for measuring the spatial dimensions of complex curved surface parts according to claim 2, characterized in that, One end of the universal ball head (4) is a screw and the other end is a ball structure. The screw is threaded to the base (2) and the ball structure is connected to the clamping member (3).

4. The apparatus for measuring the spatial dimensions of complex curved surface parts according to claim 2, characterized in that, The clamping member (3) includes a first clamping plate (5), a second clamping plate (6), and a locking bolt (7), wherein the locking bolt (7) is a positive and negative threaded rod; One end of the first clamping plate (5) and the second clamping plate (6) near the side is provided with a spherical snap-fit ​​cavity for snapping the universal ball head (4); The other end of the first clamping plate (5) and the second clamping plate (6) is provided with a rod-shaped clamping cavity for clamping the first telescopic measuring rod (9), or a spherical measuring head dial indicator is provided through the other end of the first clamping plate (5) and the second clamping plate (6).

5. The apparatus for measuring the spatial dimensions of complex curved surface parts according to claim 4, characterized in that, The spherical probe dial indicator includes a dial indicator (13) and a ball probe (10), and a second telescopic probe (11) is provided between the dial indicator (13) and the ball probe (10). The second telescopic measuring rod (11) is interference-fitted into the sleeve (12). The sleeve (12) passes through the first clamping plate (5) and the second clamping plate (6) in sequence. The outer wall of the sleeve (12) is a variable diameter structure. One end of the sleeve (12) is interference-fitted with the first clamping plate (5) or the second clamping plate (6) close to the dial indicator (13), and the other end is gap-fitted with the first clamping plate (5) or the second clamping plate (6) far away from the dial indicator (13).

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