Needle gauge clamping tool for rapid inspection of hole size

Abstract

The utility model relates to the technical field of tool clamps, and discloses a pin gauge clamping tool for rapid inspection of hole size, which comprises an upper clamping plate, the rear end of the upper clamping plate is detachably connected with a lower clamping plate, a hand-screwing bolt is arranged at the through hole of the upper clamping plate and the lower clamping plate, the external of the hand-screwing bolt is in threaded connection with an embedded nut, and the embedded nut is in threaded connection with the lower clamping plate. Needle gauge grooves are formed in the two ends of the sides, close to each other, of the upper clamping plate and the lower clamping plate, needle gauges are placed on the inner walls of the two needle gauge grooves, a butt joint assembly is arranged on the sides, close to each other, of the upper clamping plate and the lower clamping plate, and the butt joint assembly comprises two positioning pin columns; the two positioning pin columns are fixedly connected to the two sides of the rear end of the upper clamping plate respectively. According to the utility model, through the cooperation of the hand-screwed M6 bolt and the M6 hexagon nut, the needle gauge can be rapidly installed and replaced, rapid positioning is realized by combining the automatic positioning pin column, and compared with a traditional hand-held needle gauge detection mode, the detection efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a pin gauge clamping tooling for rapid inspection of hole dimensions. Background Technology

[0002] In manufacturing, accurate measurement of hole dimensions is crucial for ensuring product quality. The precision of hole dimensions directly affects the assembly, function, and performance of components, especially in high-end manufacturing fields such as precision machinery, automobiles, and aerospace. For example, holes that are too large or too small may prevent parts from fitting precisely, affecting the tightness of mechanical assembly and consequently impacting the operational stability, reliability, and safety of equipment. Conversely, if the hole dimensions do not meet design requirements, it may result in significant tolerances in the product, thus affecting the quality and performance of the final product.

[0003] In manufacturing, accurate hole size measurement is crucial for ensuring product quality. Traditional hole size measurement methods typically use measuring tools such as calipers, micrometers, and dial indicators. These tools are widely used in machining, manufacturing, and quality control. Calipers are a general-purpose measuring tool that can be used to measure inner and outer diameters, depth, and step dimensions. Micrometers are primarily used for high-precision outer and inner diameter measurements, offering extremely high accuracy, reaching one-thousandth of a millimeter. Dial indicators are specifically designed for measuring the inner diameter of holes, and are particularly suitable for measuring the dimensions of deep and irregular holes.

[0004] Traditional methods for hole size inspection, such as using calipers and micrometers, are complex and inefficient for holes requiring high precision. While pin gauges, a commonly used tool for hole size inspection, can quickly determine if a hole's dimensions are within tolerance, they suffer from problems in practical use, including difficulty in clamping and inaccurate positioning. Currently, most operators use handheld pin gauges, which is not only cumbersome and extremely inefficient, consuming significant time and manpower costs for batch inspections, but also susceptible to instability due to handheld operation, easily influenced by individual operator factors, leading to a substantial reduction in the accuracy of the inspection results. Furthermore, traditional pin gauges lack dedicated clamping fixtures, making it difficult to meet the precision requirements for hole size inspection. Therefore, this paper proposes a pin gauge clamping fixture for rapid hole size inspection to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a needle gauge clamping fixture for rapid inspection of hole size, aiming to improve the problem that the existing method of hand-held needle gauge inspection is not only cumbersome to operate, but also extremely inefficient.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A needle gauge clamping fixture for rapid hole size inspection includes an upper clamping plate, a lower clamping plate detachably connected to the rear end of the upper clamping plate, a hand-tightening bolt installed at the through hole of the upper clamping plate and the lower clamping plate, an embedded nut connected to the external thread of the hand-tightening bolt, needle gauge grooves opened at both ends of the adjacent side of the upper clamping plate and the lower clamping plate, a needle gauge placed on the inner wall of the two needle gauge grooves, and a mating assembly provided on the adjacent side of the upper clamping plate and the lower clamping plate;

[0008] As a further description of the above technical solution:

[0009] The docking assembly includes two positioning pins, which are fixedly connected to the rear ends of the upper clamping plate on both sides. Positioning grooves are provided on both front ends of the lower clamping plate, and the outer side of the positioning pins engages with the inner wall of the positioning groove.

[0010] As a further description of the above technical solution:

[0011] The external part of the embedded nut is mounted on the rear end of the lower clamping plate;

[0012] As a further description of the above technical solution:

[0013] The front end of the hand-tightening bolt is fixedly connected to a handle;

[0014] As a further description of the above technical solution:

[0015] The hand-tightening bolt passes through the edges of the upper and lower clamping plates in sequence and has anti-slip textures, which are raised strips or granules.

[0016] As a further description of the above technical solution:

[0017] The two positioning pins are evenly distributed at the edge of the upper clamping plate near the mating surface of the lower clamping plate;

[0018] As a further description of the above technical solution:

[0019] The embedded nut is an embedded positioning lock nut, and the hand-tightening bolt is an M6 bolt;

[0020] As a further description of the above technical solution:

[0021] The lower end of the embedded positioning locking nut is fitted with a rotatable guide washer, and the upper edge of the guide washer is attached to the outside of the embedded positioning locking nut.

[0022] As a further description of the above technical solution:

[0023] The upper and lower surfaces of the guide washer are both radially arranged with multiple elongated teeth, and the left and right side walls of the internal threaded hole of the embedded positioning locking nut are each fitted with a locking block to prevent the embedded positioning locking nut from rotating.

[0024] This utility model has the following beneficial effects:

[0025] 1. In this utility model, the needle gauge can be quickly installed and replaced by hand-tightening the M6 ​​bolt and the M6 ​​hexagonal nut. Combined with the automatic positioning pin, rapid positioning is achieved. Compared with the traditional hand-held needle gauge inspection method, the inspection efficiency is greatly improved. When inspecting hole-type parts in batches, it can save a lot of time and labor costs, effectively improve production efficiency, and meet the needs of efficient production in modern manufacturing.

[0026] 2. In this utility model, the upper and lower clamping plates made of POM material, combined with the precisely designed needle gauge groove, provide a stable and reliable clamping force for the needle gauge, effectively avoiding the shaking and displacement of the needle gauge during the inspection process. The automatic positioning pin reduces the error of manual positioning, thereby improving the accuracy of hole size inspection and providing a strong guarantee for product quality.

[0027] 3. In this utility model, when operators use this tooling to inspect hole dimensions, they do not need to hold the needle gauge for a long time, which avoids hand fatigue and discomfort, reduces labor intensity, and makes the inspection work easier and more efficient.

[0028] 4. In this utility model, by adjusting the hand-tightened M6 bolt and the M6 ​​embedded hexagonal nut, it can be used to clamp different specifications of needle gauges and can be used to inspect a variety of holes of different sizes. It has strong versatility and reduces the cost for enterprises to purchase a variety of testing equipment for inspecting holes of different sizes. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of a needle gauge clamping fixture for rapid inspection of hole size proposed in this utility model;

[0030] Figure 2 This is a schematic diagram of the hand-tightening bolt of a needle gauge clamping fixture for rapid hole size inspection proposed in this utility model.

[0031] Figure 3 This is a schematic diagram of the embedded nut of a pin gauge clamping fixture for rapid hole size inspection proposed in this utility model.

[0032] Legend:

[0033] 1. Upper clamping plate; 2. Lower clamping plate; 3. Hand-tightening bolt; 4. Pin gauge; 5. Embedded nut; 6. Pin gauge groove; 7. Locating pin; 8. Locating groove. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Reference Figures 1 to 3 This utility model provides an embodiment of a needle gauge clamping fixture for rapid hole size inspection, comprising an upper clamping plate 1, with a lower clamping plate 2 detachably connected to the rear end of the upper clamping plate 1. The detachable connection between the upper clamping plate 1 and the lower clamping plate 2 facilitates cleaning and maintenance, ensuring the cleanliness and long-term stability of the tool. The edges of the upper clamping plate 1 and the lower clamping plate 2 are provided with anti-slip textures, which are raised strips or granules. This anti-slip design enhances grip stability, prevents tool slippage during operation, and thus improves measurement accuracy.

[0036] Hand-tightening bolts 3 are installed at the through holes of the upper clamping plate 1 and the lower clamping plate 2. A handle is fixedly connected to the front end of the hand-tightening bolt 3. The handle design makes it more comfortable for the operator to clamp or loosen the tooling and reduces hand fatigue. The external thread of the hand-tightening bolt 3 is connected to an embedded nut 5, which is an embedded positioning lock nut. The use of this lock nut can effectively prevent loosening under high frequency of use, thereby ensuring that the equipment can maintain accurate clamping force for a long time. The hand-tightening bolt 3 is an M6 bolt. The hand-tightening bolt 3 passes through the upper clamping plate 1 and the lower clamping plate 2 in sequence. The external part of the embedded nut 5 is installed at the rear end of the lower clamping plate 2. This configuration design improves the compactness of the structure and makes the overall tooling more stable and less susceptible to external interference.

[0037] The lower end of the embedded positioning locking nut is fitted with a rotatable guide washer. The upper edge of the guide washer hangs on the outside of the embedded positioning locking nut. This design provides better control when adjusting the spacing, ensuring accurate positioning even when clamping pin gauges of different thicknesses. The upper and lower surfaces of the guide washer are radially arranged with multiple elongated teeth. These teeth provide stronger friction during clamping, thereby increasing the stability and safety of the entire clamping system. The left and right side walls of the internal threaded hole of the embedded positioning locking nut are fitted with locking blocks to prevent the embedded positioning locking nut from rotating. This design effectively prevents the nut from rotating accidentally during use, ensuring that the tooling remains stable during operation.

[0038] Both ends of the upper clamping plate 1 and the lower clamping plate 2 are provided with needle gauge grooves 6 on the adjacent side. The inner walls of the two needle gauge grooves 6 are used to place needle gauges 4. The design of the needle gauge grooves 6 ensures that the needle gauges 4 can be installed seamlessly, avoiding detection errors caused by instability, thereby improving work efficiency. The upper clamping plate 1 and the lower clamping plate 2 are provided with a docking assembly, which includes two positioning pins 7. The setting of these two positioning pins 7 ensures that the fixture can maintain consistent positioning during assembly and use, improving the repeatability of the tooling. The two positioning pins 7 are evenly distributed on the edge of the upper clamping plate 1 near the mating surface of the lower clamping plate 2. The even distribution design not only enhances the overall symmetry, but also reduces local stress concentration when bearing load, making it more stable.

[0039] Two positioning pins 7 are fixedly connected to the rear sides of the upper clamping plate 1, and positioning grooves 8 are provided on both sides of the front end of the lower clamping plate 2. The presence of positioning grooves 8 allows the positioning pins 7 to slide freely during the use of the tooling, thereby ensuring efficient positioning and disassembly. The outside of the positioning pins 7 engages with the inner wall of the positioning grooves 8. This engagement design ensures seamless connection between the upper clamping plate 1 and the lower clamping plate 2 during the clamping process, further optimizing the ease and accuracy of operation.

[0040] Working principle: First, ensure all parts of the fixture are clean and free of impurities. Then, align the upper clamping plate 1 and the lower clamping plate 2, ensuring the needle gauge groove 6 corresponds. Securely connect the two clamping plates using the hand-tightened bolts 3, and adjust the spacing to match the required needle gauge 4 thickness. Install the automatic positioning pin 7 to ensure precise fixture alignment. During the inspection process, the operator selects a suitable needle gauge 4 and embeds it into the needle gauge groove 6 of the clamping plate, ensuring it is stable and level. During operation, hold the fixture and quickly position it on the hole to be inspected using the positioning pin 7. Slowly insert the instrument for measurement. If the needle gauge 4 can fit tightly against the hole wall, the hole meets the standard; if it cannot be inserted, the hole diameter is too small. In addition, for no-go gauge inspection, a needle gauge 4 that can rotate easily indicates that the hole meets the no-go gauge requirements. After the inspection is completed, clean and inspect the fixture promptly to ensure its long-term stability and effectiveness.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A needle gauge clamping tool for fast hole size inspection, comprising an upper clamping plate (1), characterized in that: The rear end of the upper clamping plate (1) is detachably connected with a lower clamping plate (2), the through hole of the upper clamping plate (1) and the lower clamping plate (2) is provided with a hand screw bolt (3), the outer thread of the hand screw bolt (3) is connected with an embedded nut (5), the similar side of the upper clamping plate (1) and the lower clamping plate (2) is provided with a needle gauge groove (6) at both ends, the inner wall of the two needle gauge grooves (6) is placed with a needle gauge (4), and the similar side of the upper clamping plate (1) and the lower clamping plate (2) is provided with a butt joint assembly.

2. The needle gauge clamping tool for hole size quick inspection according to claim 1, characterized in that: The butt joint assembly comprises two positioning pin columns (7), the two positioning pin columns (7) are fixedly connected at the rear end of the upper clamping plate (1) respectively, the front end of the lower clamping plate (2) is provided with a positioning groove (8) at both sides, and the outer portion of the positioning pin column (7) is clamped with the inner wall of the positioning groove (8).

3. The needle gage holding tool for fast hole size inspection according to claim 1, characterized in that: The outer portion of the embedded nut (5) is mounted at the rear end of the lower clamping plate (2).

4. The needle gage holding tool for fast hole size inspection according to claim 1, characterized in that: The front end of the hand screw bolt (3) is fixedly connected with a handle.

5. The needle gage holding fixture for fast hole size inspection according to claim 1, characterized in that: The hand screw bolt (3) passes through the upper clamping plate (1) and the lower clamping plate (2) in sequence.

6. The needle gage holding fixture for fast hole size inspection according to claim 1, characterized in that: The edge of the upper clamping plate (1) and the lower clamping plate (2) is provided with an anti-skid line, and the anti-skid line is a convex strip or particle.

7. The needle gage holding tool for fast hole size inspection according to claim 2, characterized in that: The two positioning pin columns (7) are uniformly distributed at the edge position of the upper clamping plate (1) close to the bonding surface of the lower clamping plate (2).

8. The needle gage holding tool for fast hole size inspection according to claim 1, characterized in that: The embedded nut (5) is an embedded positioning locking nut, and the hand screw bolt (3) is an M6 bolt.

9. The needle gage holding fixture for fast hole size inspection according to claim 8, characterized in that: The lower end of the embedded positioning locking nut is sleeved with a guide washer which can rotate, and the upper end of the guide washer is hung on the outer side of the embedded positioning locking nut.

10. The needle gauge holding tool for fast hole size inspection according to claim 9, characterized in that: The upper surface and the lower surface of the guide washer are provided with a plurality of long strip-shaped teeth in a radial manner, and the left and right side walls of the embedded positioning locking nut are provided with clamping blocks for preventing the embedded positioning locking nut from rotating. The embedded positioning locking nut is provided with clamping blocks for preventing the embedded positioning locking nut from rotating.

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