A metering aid for impact testing

Abstract

The utility model discloses a kind of measurement auxiliary devices for impact test, including device ontology, the device ontology is cube, first M5 threaded hole area and first M6 threaded hole area are all arranged on the four side wall surfaces of the device ontology, second M5 threaded hole area and second M6 threaded hole area are arranged on the top surface of the device ontology, the threaded hole of each threaded hole area on device ontology is used for installing sensor, and respectively with the center of the plane where it is symmetrically laid out, fixed bolt is arranged in the bottom surface center position of device ontology, bolt through-hole is also arranged in the center position of a pair of symmetrical side wall surfaces of device ontology, and the fixed bolt and bolt through-hole are all used for fixing device ontology. The utility model is through the innovative symmetrical hole site layout and multi-specification threaded fitting design, effectively solve the problem of measurement error and low efficiency caused by the difference of sensor installation position in conventional measurement mode.

Description

Technical Field

[0001] This utility model belongs to the field of metrology technology, specifically relating to a metrology auxiliary device for impact testing. Background Technology

[0002] To verify whether the impact testing equipment can produce the specified response, the equipment needs to be calibrated regularly.

[0003] When measuring impact testing equipment (including but not limited to air cannons and pendulum stands), the fixed spacing of mounting holes on the tooling or test bench (usually multiples of 100 mm) leads to significant differences in the impact response spectra captured by the measuring and detection sensors due to the fact that the hole spacing is fixed. Therefore, repeated adjustments to the sensor positions are necessary to meet tolerance requirements, resulting in a single measurement taking 1-3 hours and being inefficient.

[0004] While existing metering auxiliary devices can simultaneously measure equipment in different directions (such as air cannons (vertical) and pendulum tables (horizontal)), most have a single threaded hole, making them incompatible with sensors of different thread specifications. Furthermore, they cannot simultaneously install both metering and detection sensors. Therefore, multiple metering auxiliary devices and repeated sensor adjustments are required, increasing workload and reducing efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a metrological auxiliary device for impact testing.

[0006] This utility model is implemented according to the following technical solution.

[0007] A metrological auxiliary device for impact testing includes a device body, which is a cube. Each of the four side walls of the device body has a first M5 threaded hole area and a first M6 threaded hole area. The top surface of the device body has a second M5 threaded hole area and a second M6 threaded hole area. The threaded holes in each threaded hole area of ​​the device body are used to install sensors and are arranged symmetrically about the center of their respective surfaces. A fixing bolt is located at the center of the bottom surface of the device body, and bolt through holes are located at the center of a pair of symmetrical side walls of the device body. Both the fixing bolt and the bolt through holes are used to fix the device body.

[0008] The beneficial effects of this utility model are: 1. During the air cannon metering process, symmetrical hole placement improves the consistency of the response spectra picked up by the detection sensors of the control system and the metering sensors of the metering system, reducing the metering time from 1 hour to 0.2 hours and increasing efficiency. Before using this metering auxiliary device, the metering time was uncertain, requiring simultaneous compliance with the tolerances of both the metering system and the control system, thus necessitating repeated adjustments to the sensor positions.

[0009] 2. Compatible with multiple specifications of threaded sensors, improving the compatibility rate. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the present invention. Figure 1 ; Figure 3 This is a side view of the present invention. Figure 2 ; Figure 4 This is a top view of the present invention; Figure 5 This is a schematic diagram of the bottom surface of this utility model.

[0011] Among them, 1-device body, 111-top surface, 112-bottom surface, 2-first M5 threaded hole area, 3-first M6 threaded hole area, 4-second M5 threaded hole area, 5-second M6 threaded hole area, 6-fixing bolt, 7-bolt through hole. Detailed Implementation

[0012] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0013] like Figures 1-5 As shown, a metrological auxiliary device for impact testing includes a device body 1, which is a cube. Each of the four side walls of the device body 1 has a first M5 threaded hole area 2 and a first M6 threaded hole area 3. The top surface 111 of the device body 1 has a second M5 threaded hole area 4 and a second M6 threaded hole area 5. The threaded holes in each threaded hole area of ​​the device body 1 are used to install sensors and are arranged symmetrically with respect to the center of their respective surfaces. A fixing bolt 6 is located at the center of the bottom surface 112 of the device body 1. Bolt through holes 7 are also located at the center of a pair of symmetrical side walls of the device body 1. Both the fixing bolt 6 and the bolt through holes 7 are used to fix the device body 1.

[0014] The aforementioned metering auxiliary device for impact testing has its main body 1 and fixing bolt 6 integrally formed.

[0015] The impact testing metering auxiliary device has three threaded holes on each of the four side walls of the device body 1, specifically in the first M5 threaded hole area 2 and the first M6 threaded hole area 3. The threaded holes in the first M5 threaded hole area 2 are arranged in an equilateral L-shape, while the threaded holes in the first M6 threaded hole area 3 are arranged in an unequal L-shape.

[0016] The impact testing metering auxiliary device has four threaded holes on the top surface of the device body 1, specifically in the second M5 threaded hole area 4 and the second M6 threaded hole area 5, which are arranged in an unequal L-shape.

[0017] The device body 1 has six surfaces: four side walls, one top surface, and one bottom surface. Five of these surfaces—the four side walls and the top surface—have centrally symmetrically distributed threaded holes. Each of these five surfaces contains two threaded hole areas with different diameters; that is, each threaded hole area contains two different diameter threaded holes for simultaneously mounting sensors of different sizes. The hole distribution on the four side walls is as follows: Figure 2 , Figure 3 As shown, the top facet distribution is as follows: Figure 4 As shown; the fixing bolts 6 on the bottom surface of the device body 1 are used to fix the device body 1 to the tooling or equipment table. There is a bolt through hole 7 on the side of the device body 1, which can also be used to fix the device body 1 to the tooling or equipment table.

[0018] The fixing bolt 6 is integrally designed with the device body 1 and is located at the center of the bottom surface of the device body 1. Its diameter can be selected according to the size of the mounting hole of the tooling (test platform). The bolt through hole 7 is located at the center of a pair of symmetrical side walls of the device body 1, and its diameter can be designed according to requirements. By using the fixing bolt 6 and the bolt through hole 7 in combination, and utilizing the threaded holes in different threaded hole areas on the five surfaces of the device body 1, it is possible to measure equipment in different directions (such as air cannons (vertical) and pendulum tables (horizontal)).

[0019] The holes in the threaded areas of the device body 1, namely the M5 and M6 threaded holes in the first M5 threaded hole area 2, the first M6 threaded hole area 3, the second M5 threaded hole area 4, and the second M6 threaded hole area 5, are designed to accommodate impact sensors of various models and installation sizes. Their diameter and pitch should be determined based on the actual sensor installation dimensions (diameter, pitch, length, etc.). Common sensors are mostly single-bolt sensors with installation dimensions such as M5×0.75 and M6×0.75. The center distance between two adjacent threaded holes (e.g., 10mm ≤ distance between holes ≤ 30mm, which can be adjusted according to the sensor size) is sufficient for the simultaneous installation of two impact sensors; Figure 4 As shown, the center distance between any two adjacent threaded holes on the top surface can be the same (e.g., 20mm ≤ distance between the two holes ≤ 30mm).

[0020] The M5 threaded hole area (first M5 threaded hole area 2 or second M5 threaded hole area 4) and the M6 ​​threaded hole area (first M6 threaded hole area 3 or second M6 threaded hole area 5) can be arranged in more different areas depending on the type of impact sensor bolt. As long as the hole center point is symmetrical or axisymmetric within the same plane, consistency can be guaranteed. Here, axisymmetric means... Figures 2-4 The center line of the plane of symmetry (dashed line). For example... Figure 4 In the middle, the second M5 threaded hole area 4 and the second M6 threaded hole area 5 on the top surface can simultaneously install impact sensors of different installation sizes (such as M5 detection sensors and M6 metering sensors) at their centrally symmetrical positions, or sensors of the same installation size can be installed in the same threaded hole area (such as simultaneously installing M6 metering sensors and M6 detection sensors in the first M6 threaded hole area 3), thus providing good compatibility with impact sensors of various sizes.

[0021] The technical problem to be solved by this utility model is: This utility model provides a metrological auxiliary device for impact testing, which integrates centrally symmetrical and axisymmetric mounting holes and multi-size thread adaptation. It eliminates the problem of poor consistency and low efficiency caused by the difference in position between the metrological sensor and the detection sensor during measurement, thus achieving efficient measurement.

[0022] The core structure of this utility model is: 1. Multi-size sensor centrally and axially symmetrical mounting: Multiple threaded holes for mounting sensors are centrally symmetrically arranged on the five sides of the metering auxiliary device body. Figure 2 , Figure 3 , Figure 4 ), 10mm≤ the distance between the two holes≤30mm, to ensure the consistency of the sensor's pickup response spectrum.

[0023] 2. Multi-size threaded hole partition design: Different sizes of threaded holes (such as M5×0.75 and M6×0.75) are centrally symmetrically set on the five sides of the device body to adapt to various sensor specifications.

[0024] 3. Diverse installation methods: The bottom surface of the metering auxiliary device is equipped with standard fixing bolts 6, and the side wall is equipped with bolt through holes 7. It can be directly adapted to the air gun table, pendulum table, and tooling through the fixing bolts 6 or bolt through holes 7.

[0025] The innovation of this utility model lies in: 1. Symmetrical response consistency: The influence of positional differences on the picked-up impact response spectrum is offset by geometric symmetry.

[0026] 2. Thread compatibility design: The partitioned threaded holes allow for the direct installation of sensors of different specifications without the need for additional adapters.

[0027] 3. Predictive Measurement Method: Supports finding the appropriate response position on the tooling or equipment table in advance through pre-testing. During formal measurement, the measurement sensor is installed on this measurement auxiliary device and is in a centrally symmetrical or axis-symmetrical hole position with the detection sensor to ensure that the equipment measurement can pass in one go.

[0028] Example 1: Air Cannon Measurement To verify whether the air cannon can generate a satisfactory impact response spectrum (such as magnitude and inflection point frequency), a third-party metrology institution is needed to perform metrological verification of the air cannon. Therefore, in this embodiment 1, a predictive measurement method unique to this paper is used to improve the metrological efficiency of the air cannon. Figure 1 As shown, the metering auxiliary device is fixed to a point on the test fixture on the air cannon resonator plate using fixing bolts 6, with the top surface of the metering auxiliary block facing upwards after installation. Then, the metered detection sensor (M6×0.75 thread) is screwed into the second M6 threaded hole area 5 on the top surface. Figure 4 The required impact response spectrum is input into the control system. By repeatedly adjusting the air gun test parameters (such as pressure, excitation position, etc.), the response curve at that point is adjusted to within the specified tolerance. This completes the prediction process. At this point, it indicates that the response at that point meets the requirements (i.e., the prediction objective has been achieved). After the third-party metrology personnel arrive, the metrology sensor (M5×0.75 thread) is installed into the second M5 threaded hole area 4 on the top surface. Figure 4 The air gun is placed in the threaded hole at the center symmetrical position of the air gun, and the air gun parameters (such as pressure, excitation position, etc.) are kept constant. The air gun measurement work is completed according to the expected parameters.

[0029] Example 2: Pendulum Stage Measurement Calibration To verify whether the pendulum stage can generate the required impact response spectrum (such as magnitude, inflection point frequency, etc.), a third-party metrology institution needs to perform metrological verification on the pendulum stage. The metrology auxiliary device is fixed to the pendulum stage surface through bolt through hole 7. The calibrated detection sensor (M6×0.75 thread) is screwed into the top surface (…). Figure 4 Tighten the screw in the upper left threaded hole. Input the required impact response spectrum into the control system, and adjust the response curve at this point to within the specified tolerance by repeatedly adjusting the pendulum test parameters (such as lifting height, excitation position, etc.). This completes the expected measurement process. Install the metering sensor (M6×0.75 thread) into the lower left M6 threaded hole. Figure 4 At this point, no adjustment is needed; the pendulum platform measurement work is completed based on the expected parameters.

[0030] Example 3: Pendulum Stage Measurement Calibration The metering auxiliary device is fixed to the L-plate fixture through the bolt through hole 7. The detection sensor (M5×0.75 thread) is screwed into the M5 threaded hole area (6) on the side wall. Figure 3 Tighten the screw in the lower right threaded hole and perform the expected measurement process. Install the metering sensor (M6×0.75 thread) into the upper left M6 threaded hole. Figure 3 No adjustments are needed; the measurement work can be completed based on the pre-test parameters.

[0031] This utility model discloses a metrological auxiliary device for impact testing, which is an integrated metrological calibration auxiliary device suitable for impact testing equipment (including but not limited to air guns and pendulum stands). Through an innovative symmetrical hole layout and multi-specification thread adaptation design, it effectively solves the problems of measurement errors and low efficiency caused by differences in sensor installation positions in traditional metrological methods.

[0032] This invention is particularly suitable for fields such as aerospace and military equipment where high accuracy in impact testing is required, and can be extended to other mechanical testing scenarios that require simultaneous multi-sensor calibration.

[0033] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of this utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A metering auxiliary device for impact testing, characterized in that, The device includes a device body (1), which is a cube. The four side walls of the device body (1) are provided with a first M5 threaded hole area (2) and a first M6 threaded hole area (3). The top surface (111) of the device body (1) is provided with a second M5 threaded hole area (4) and a second M6 threaded hole area (5). The threaded holes in each threaded hole area of ​​the device body (1) are used to install sensors and are arranged symmetrically with respect to the center of their respective surfaces. A fixing bolt (6) is provided at the center of the bottom surface (112) of the device body (1). A bolt through hole (7) is also provided at the center of a pair of symmetrical side walls of the device body (1). The fixing bolt (6) and the bolt through hole (7) are used to fix the device body (1).

2. The metering auxiliary device for impact testing according to claim 1, characterized in that, The device body (1) and the fixing bolt (6) are integrally formed.

3. The metering auxiliary device for impact testing according to claim 1, characterized in that, The device body (1) has three threaded holes in the first M5 threaded hole area (2) and the first M6 threaded hole area (3) on the four side walls. The threaded holes in the first M5 threaded hole area (2) are arranged in an equilateral L-shape, while the threaded holes in the first M6 threaded hole area (3) are arranged in an unequal L-shape.

4. The metering auxiliary device for impact testing according to claim 1, characterized in that, The number of threaded holes in the second M5 threaded hole area (4) and the second M6 threaded hole area (5) on the top surface of the device body (1) are both 4, and they are arranged in an unequal L-shape.

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