Spherical precision testing fixture
By designing spherical accuracy detectors, using reference spherical fitting inspections of standard blocks and calibration blocks, the problems of poor time-saving and high cost of spherical parts on the production site are solved, and fast and accurate inspection and mass production requirements are achieved.
Patent Information
- Application Number
- CN202422843446.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The prior art is difficult to efficiently and accurately detect each spherical part at the production site, resulting in poor detection time and high cost, and the dimensional accuracy of mass production cannot be guaranteed.
A spherical accuracy detector is designed, including the detector and the calibrator. The reference spherical surface of the standard block and the calibration block is bonded to the parts to be inspected for inspection. The neutrality is ensured through the coordination of the guide pin and the guide hole, and the fast and accurate detection is achieved.
It realizes rapid and accurate inspection of each product at the production site, ensures the dimensional accuracy of mass production, reduces production costs, and improves production efficiency.
Smart Images
Figure CN223271816U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of spherical surface detection, in particular to a spherical surface precision detection tool. Background Art
[0002] Spherical structures are common in mechanical parts. Spherical mating typically involves direct contact between a convex and concave sphere, requiring high precision. Spheres are curved, making direct inspection difficult using conventional fixtures. Therefore, surface accuracy is typically tested using precision testing equipment such as a three-dimensional coordinate measuring machine (CMM) or an imager. Precision testing equipment requires high standards for test adjustments and is expensive. It is only suitable for batch sampling and is not suitable for on-site testing of every product. This results in poor timeliness and inability to guarantee the dimensional accuracy and mass production requirements for all products. Utility Model Content
[0003] In view of the shortcomings of the above-mentioned existing spherical surface detection methods, the applicant provides a spherical surface precision inspection tool with a reasonable structure, which is suitable for production sites, has good timeliness, and ensures the dimensional accuracy of products and mass production requirements.
[0004] The technical solutions adopted in this utility model are as follows:
[0005] A spherical surface precision inspection tool comprises an inspection tool and a calibration tool. The inspection tool comprises a gauge and a standard block. The gauge rod of the gauge is connected to the dial, the standard block is connected to the lower end of the gauge rod, and a reference spherical surface is provided on the bottom surface of the standard block. The reference spherical surface is a standard convex spherical surface or a standard concave spherical surface. During inspection, the reference spherical surface fits the spherical surface of the part to be inspected.
[0006] As a further improvement of the above technical solution:
[0007] A guide pin is connected to the bottom of the standard block, and the lower part of the guide pin extends downward from the standard convex spherical surface / standard concave spherical surface.
[0008] The outer diameter of the guide pin is smaller than the inner diameter of the guide hole on the calibration block, and the length of the guide pin extending from the standard block is smaller than the hole depth of the guide hole.
[0009] The guide pin is arranged at the center of the standard convex spherical surface / standard concave spherical surface, and the center axis of the guide pin passes through the center point of the standard convex spherical surface / standard concave spherical surface.
[0010] The lower end of the meter rod is connected with a fixed block, a concave cavity is opened in the fixed block, and the standard block is inserted into the concave cavity.
[0011] The standard block is fitted with the cavity, and the depth of the cavity is greater than the height of the standard block.
[0012] The lower end of the meter rod is connected to the meter head, and the standard block is connected to the meter head; the center points of the standard convex spherical surface and the standard concave spherical surface are located on the central axis of the meter rod and the meter head.
[0013] A boss is provided at the bottom of the standard block, and a standard convex spherical surface is provided at the bottom of the boss.
[0014] The calibration tool comprises a calibration block, which is provided with a calibration concave spherical surface or a calibration convex spherical surface, and a guide hole is opened in the center of the calibration block.
[0015] The school tool also includes a base, which is provided with a placement slot.
[0016] A placement slot is provided on the base.
[0017] The beneficial effects of the utility model are as follows:
[0018] The utility model provides a calibrated reference spherical surface that meets the requirements on the calibration block of the inspection fixture, and detects the spherical surface by fitting the reference spherical surface of the calibration block with the detection spherical surface of the part to be inspected. The operation is convenient and fast, and the detection accuracy is high. It is suitable for testing each product on the production site, and has good timeliness. It not only ensures the dimensional accuracy of batch products and the batch production requirements, but also saves production costs and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of the utility model for detecting concave spherical surfaces.
[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle.
[0021] Figure 3 This is a schematic diagram of the structure of the utility model for detecting convex spherical surfaces.
[0022] Figure 4 for Figure 3 Enlarged view of point B in the middle.
[0023] In the figure: 1. Base; 11. Placement slot; 2. Gauge; 21. Dial; 22. Gauge stem; 23. Gauge head; 3. Fixing block; 31. Concave cavity; 4. Standard block; 41. Standard convex spherical surface; 42. Standard concave spherical surface; 43. Boss; 5. Guide pin;
[0024] 10. Calibration block; 101. Calibration concave spherical surface; 102. Calibration convex spherical surface; 103. Guide hole. DETAILED DESCRIPTION
[0025] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.
[0026] like Figures 1 to 4As shown, the spherical precision inspection tool described in the present invention includes an inspection tool for detecting spherical precision and a calibration tool for zeroing. The inspection tool includes a gauge 2, a fixing block 3, a standard block 4, and a guide pin 5. The calibration tool includes a calibration block 10 and a base 1. A placement slot 11 is provided on the base 1. During zeroing, the calibration block 10 is placed in the placement slot 11 and fixed by a fastener. A calibration concave spherical surface 101 or a calibration convex spherical surface 102 is provided on the calibration block 10, and a guide hole 103 is provided in the center of the calibration block 10. The calibration tool is used for zeroing the inspection tool. After calibration, the standard block 4 is placed on the part to be inspected to see the part size error.
[0027] The meter 2 includes a dial 21, a meter stem 22 and a meter head 23. The meter stem 22 is connected to the dial 21, and the meter head 23 is connected to the lower end of the meter stem 22. The fixed block 3 is connected to the lower end of the meter stem 22. A cavity 31 is provided in the fixed block 3. The standard block 4 is connected to the meter head 23 and inserted into the cavity 31. The standard block 4 and the cavity 31 have a clearance fit. The standard block 4 can move up and down in the cavity 31. The depth of the cavity 31 is greater than the height of the standard block 4, which reserves sufficient space for the standard block 4 to move and prevent the fixed block 3 from interfering with the movement of the standard block 4 and affecting the test results. The bottom surface of the standard block 4 is provided with a standard convex spherical surface 41 ( Figure 1 、 Figure 2 As shown) or the upward concave standard concave spherical surface 42 ( Figure 3 、 Figure 4 As shown in FIG), the standard convex spherical surface 41 and the standard concave spherical surface 42 are calibrated reference spherical surfaces that meet the requirements; the center point of the standard convex spherical surface 41 / standard concave spherical surface 42 is located on the central axis of the dial stem 22 and the dial head 23. Figure 1 、 Figure 2As shown, a boss 43 extends downward from the bottom of the standard block 4. This boss 43 ensures that the part fits the standard block 4 after calibration, allowing for downward movement when a negative dimensional deviation occurs. A standard convex spherical surface 41 is located at the bottom of boss 43. A guide pin 5 is vertically connected to the center of the bottom of the standard block 4. The guide pin 5 is located at the center of the standard convex spherical surface 41 / standard concave spherical surface 42, with the central axis of the guide pin 5 passing through the center point of the standard convex spherical surface 41 / standard concave spherical surface 42. The lower portion of the guide pin 5 extends downward from the standard convex spherical surface 41 / standard concave spherical surface 42. During zero calibration, the lower portion of the guide pin 5 is inserted into the guide hole 103 in the center of the calibration block 10, ensuring that the standard convex spherical surface 41 / standard concave spherical surface 42 of the standard block 4 is aligned with the calibration concave spherical surface 101 / calibration convex spherical surface 102 of the calibration block 10, and that the standard convex spherical surface 41 / standard concave spherical surface 42 is aligned with the calibration concave spherical surface 101 / calibration convex spherical surface 102, thereby ensuring the accuracy of zero calibration and the accuracy of testing. The outer diameter of the guide pin 5 is smaller than the inner diameter of the guide hole 103, and the length of the guide pin 5 extending from the standard block 4 is smaller than the depth of the guide hole 103. After the guide pin 5 is inserted into the guide hole 103, there is a gap between its outer wall surface and bottom surface and the hole wall and bottom of the guide hole 103, thereby ensuring the accuracy of the detection.
[0028] When the present invention is used to inspect a part with a concave spherical surface: first, the inspection fixture is zeroed; after the inspection fixture is zeroed, the inspection fixture is placed on the part to be inspected, and the standard convex spherical surface 41 of the standard block 4 covers and fits onto the concave spherical surface of the part to be inspected. The size difference between the concave spherical surface of the part and the standard convex spherical surface 41 causes a slight change in the standard block 4, and the dial rod 22 connected to the standard block 4 also produces a slight change, thereby causing the pointer on the dial 21 to swing. The swing angle of the pointer on the dial 21 is observed. If the pointer swing angle is within the tolerance range, the part is qualified, otherwise it is unqualified.
[0029] When the present invention is used to inspect parts with convex spherical surfaces: the inspection steps are the same as above. First, the inspection fixture is zeroed. After the inspection fixture is zeroed, the inspection fixture is placed on the part to be inspected. The standard concave spherical surface 42 of the standard block 4 covers and fits onto the calibrated convex spherical surface 102 of the part to be inspected. The pointer of the dial 21 of the meter 2 is observed. If the pointer rotation angle is within the tolerance range, the part is qualified, otherwise it is unqualified.
[0030] The utility model sets a calibrated reference spherical surface that meets the requirements on the standard block 4 of the inspection fixture, and detects the spherical surface by fitting the reference spherical surface of the standard block 4 with the detection spherical surface of the part to be inspected. The operation is convenient and fast, and the detection accuracy is high. It is suitable for testing each product on the production site, and has good timeliness. It not only ensures the dimensional accuracy of batch products and batch production requirements, but also saves production costs and improves production efficiency.
[0031] The above description is an explanation of the present invention, not a limitation of the present invention. The present invention may be modified in any form without violating the spirit of the present invention.
Claims
1. A spherical precision inspection tool, characterized by: The apparatus comprises a checking fixture and a calibration fixture, wherein the checking fixture comprises a gauge (2) and a standard block (4); a gauge rod (22) of the gauge (2) is connected to a dial (21); the standard block (4) is connected to the lower end of the gauge rod (22); a reference spherical surface is provided on the bottom surface of the standard block (4); the reference spherical surface is a standard convex spherical surface (41) or a standard concave spherical surface (42); during detection, the reference spherical surface is fitted with the spherical surface of the part to be detected.
2. The spherical surface accuracy test fixture according to claim 1, characterized in that: The bottom of the standard block (4) is connected with a guide pin (5), and the lower part of the guide pin (5) extends downward from the standard convex spherical surface (41) / standard concave spherical surface (42).
3. The spherical surface accuracy tester according to claim 2, characterized in that: The outer diameter of the guide pin (5) is smaller than the inner diameter of the guide hole (103) on the calibration block (10), and the length of the guide pin (5) extending from the standard block (4) is smaller than the hole depth of the guide hole (103).
4. The spherical surface accuracy test fixture according to claim 2, characterized in that: The guide pin (5) is arranged at the center of the standard convex spherical surface (41) / standard concave spherical surface (42), and the center axis of the guide pin (5) passes through the center point of the standard convex spherical surface (41) / standard concave spherical surface (42).
5. The spherical surface accuracy tester according to claim 1, characterized in that: The lower end of the meter rod (22) is connected to a fixed block (3), a concave cavity (31) is provided in the fixed block (3), and the standard block (4) is inserted into the concave cavity (31).
6. The spherical surface accuracy tester according to claim 5, characterized in that: The standard block (4) and the concave cavity (31) are clearance-matched, and the depth of the concave cavity (31) is greater than the height of the standard block (4).
7. The spherical surface accuracy test fixture according to claim 1, characterized in that: The lower end of the meter rod (22) is connected to the meter head (23), and the standard block (4) is connected to the meter head (23); the center points of the standard convex spherical surface (41) and the standard concave spherical surface (42) are located on the central axis of the meter rod (22) and the meter head (23).
8. The spherical surface accuracy test fixture according to claim 1, characterized in that: A boss (43) is provided at the bottom of the standard block (4), and a standard convex spherical surface (41) is provided at the bottom of the boss (43).
9. The spherical surface accuracy tester according to claim 1, characterized in that: The calibration tool comprises a calibration block (10), the calibration block (10) is provided with a calibration concave spherical surface (101) or a calibration convex spherical surface (102), and a guide hole (103) is opened in the center of the calibration block (10).
10. The spherical surface accuracy tester according to claim 1, characterized in that: The calibration tool further comprises a base (1), and a placement groove (11) is provided on the base (1).