A force measuring instrument calibration and testing fixture

Abstract

This utility model relates to the field of force measuring instrument testing technology, and discloses a force measuring instrument calibration and testing fixture. The force measuring instrument calibration and testing fixture includes a support, a connecting rod, a force-applying component, and a standard force measuring instrument. The support includes a bearing plate and a top plate, with the top plate located above the bearing plate. The connecting rod is connected to the top plate, and its bottom end is used to connect to one end of the force measuring instrument to be calibrated. The force-applying component is disposed on the bearing plate. One end of the standard force measuring instrument is connected to the output end of the force-applying component, and the other end is used to connect to the other end of the force measuring instrument to be calibrated. The force axis of the force measuring instrument to be calibrated, the force axis of the standard force measuring instrument, and the force axis of the force-applying component extend along the height direction and are coaxially arranged. This utility model effectively ensures the coaxiality of the force-applying axes, completes the calibration of the force measuring instrument to be calibrated using a comparative measurement method, reduces the production cost of the force measuring instrument calibration and testing fixture, and solves the problem of difficulty in ensuring series coaxiality in actual calibration activities.

Description

Technical Field

[0001] This utility model relates to the field of force measuring instrument testing technology, and in particular to a force measuring instrument calibration and testing fixture. Background Technology

[0002] In modern industrial production, quality inspection, and scientific research, the working force gauge is a key device for accurately measuring force values. Its measurement accuracy directly affects product quality and the reliability of scientific research results, so regular calibration is essential.

[0003] Currently, existing technologies for calibrating working force gauges generally rely on electronic or electro-hydraulic testing machines to apply tensile and compressive forces. However, this method has several problems. Operationally, electronic or electro-hydraulic testing machines have complex procedures involving numerous parameter settings and precise adjustments, requiring highly skilled and experienced operators. In terms of cost, electronic or electro-hydraulic testing machines are high-precision equipment with expensive purchase prices. Furthermore, their subsequent maintenance is cumbersome, requiring regular inspections and maintenance by professional technicians, resulting in high maintenance costs.

[0004] Therefore, there is an urgent need for a force gauge calibration and testing fixture to solve the aforementioned problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a force measuring instrument calibration and testing fixture that ensures the coaxiality of the force application axis, is simple and easy to operate, and reduces the production cost of the force measuring instrument calibration and testing fixture.

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

[0007] A force gauge calibration and testing fixture, comprising:

[0008] A support frame, comprising a support plate and a top plate, the top plate being located above the support plate;

[0009] A connecting rod is attached to the top plate, and the bottom end of the connecting rod is used to connect to one end of the force measuring instrument to be calibrated.

[0010] A force-applying component, which is disposed on the bearing plate;

[0011] A standard force gauge, one end of which is connected to the output end of the force-applying component, and the other end of which is used to connect to the other end of the force gauge to be calibrated;

[0012] The force axis of the force measuring instrument to be calibrated, the force axis of the standard force measuring instrument, and the force axis of the force applying component extend along the height direction and are coaxially arranged.

[0013] As a preferred technical solution for force measuring instrument calibration and testing fixtures, the connecting rod is vertically and vertically connected to the top plate along the height direction.

[0014] As a preferred technical solution for a force measuring instrument calibration and testing fixture, the top plate is provided with a first threaded hole, the connecting rod is provided with an external thread, and the connecting rod is threadedly connected to the first threaded hole.

[0015] As a preferred technical solution for calibrating and testing tooling for a force measuring instrument, the bracket further includes multiple support columns, the bottom end of which is connected to the bearing plate, and the top end of which is connected to the top plate.

[0016] As a preferred technical solution for force measuring instrument calibration and testing fixtures, the top plate is liftably connected to multiple support columns.

[0017] As a preferred technical solution for a force measuring instrument calibration and testing fixture, the force-applying component is a double-acting manual hydraulic pump, which can apply tension or pressure to the standard force measuring instrument.

[0018] As a preferred technical solution for calibrating and testing tooling for a force measuring instrument, it also includes a workbench, which is disposed on one side of the support. The double-acting manual hydraulic pump includes a hydraulic cylinder and a manual control switch. The hydraulic cylinder is disposed on the support plate, and the manual control switch is disposed on the workbench.

[0019] As a preferred technical solution for a force measuring instrument calibration and testing fixture, it also includes multiple connecting parts. The connecting rod is connected to the force measuring instrument to be calibrated, the force measuring instrument to be calibrated is connected to the standard force measuring instrument, and the standard force measuring instrument is connected to the force applying component through the connecting parts.

[0020] As a preferred technical solution for a force measuring instrument calibration and testing fixture, the connecting member is connected to the connecting rod, the force measuring instrument to be calibrated, and the standard force measuring instrument by means of a threaded connection or a pin connection.

[0021] As a preferred technical solution for a force measuring instrument calibration and testing fixture, the force measuring instrument to be calibrated is provided with a first pin hole, the connector is provided with a connecting groove, and the connecting groove has a second pin hole on its opposite side wall. The force measuring instrument to be calibrated can extend into the connecting groove so that the first pin hole and the second pin hole are coaxially arranged, and the pin is sequentially inserted through one second pin hole, the first pin hole, and the other second pin hole.

[0022] The beneficial effects of this utility model are as follows:

[0023] This invention provides a force gauge calibration and testing fixture. When calibrating a force gauge, one end of the force gauge to be calibrated is connected to the bottom of a connecting rod, and the other end is connected to a standard force gauge. The connecting rod, the force gauge to be calibrated, the standard force gauge, and the force-applying component are arranged sequentially along the height direction. When the force-applying component applies force, the force axis of the force gauge to be calibrated, the force axis of the standard force gauge, and the force axis of the force-applying component are coaxial. The standard force gauge and the force gauge to be calibrated experience the same force. The standard force gauge provides a high-precision force standard value. By comparing the force value of the force gauge to be calibrated with that of the standard force gauge, this invention effectively ensures the coaxiality of the force-applying axes. The operation is simple and easy to understand. The calibration of the force gauge to be calibrated is completed using a comparison measurement method.

[0024] Furthermore, the force gauge calibration and testing fixture has a simple structure, which reduces the production cost of the force gauge calibration and testing fixture, and solves the problem of difficulty in ensuring series coaxiality in actual calibration activities, thus meeting the verification requirements in the verification procedure. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the force measuring instrument calibration and testing fixture provided in a specific embodiment of this utility model.

[0027] The markings in the image are as follows:

[0028] 100. Force measuring instrument to be calibrated;

[0029] 1. Bracket; 11. Bearing plate; 12. Top plate; 13. Support column; 2. Connecting rod; 21. External thread; 3. Force-applying component; 31. Hydraulic cylinder; 32. Manual control switch; 4. Standard force gauge; 5. Workbench. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] like Figure 1 As shown, this embodiment provides a force gauge calibration and testing fixture, which includes a support 1, a connecting rod 2, a force-applying component 3, and a standard force gauge 4. The support 1 includes a bearing plate 11 and a top plate 12, with the top plate 12 located above the bearing plate 11; the connecting rod 2 is connected to the top plate 12, and its bottom end is used to connect to one end of the force gauge 100 to be calibrated; the force-applying component 3 is disposed on the bearing plate 11; one end of the standard force gauge 4 is connected to the output end of the force-applying component 3, and the other end is used to connect to the other end of the force gauge 100 to be calibrated; the force axis of the force gauge 100 to be calibrated, the force axis of the standard force gauge 4, and the force axis of the force-applying component 3 extend along the height direction and are coaxially arranged.

[0035] When calibrating the force gauge, one end of the force gauge 100 to be calibrated is connected to the bottom end of the connecting rod 2, and the other end is connected to the standard force gauge 4. At this time, the connecting rod 2, the force gauge 100 to be calibrated, the standard force gauge 4, and the force-applying component 3 are arranged sequentially along the height direction. When the force-applying component 3 applies force, the force axis of the force gauge 100 to be calibrated, the force axis of the standard force gauge 4, and the force axis of the force-applying component 3 are set coaxially. The standard force gauge 4 and the force gauge 100 to be calibrated are subjected to the same force. The standard force gauge 4 provides a high-precision force standard value. The force value of the force gauge 100 to be calibrated is compared with the force value of the standard force gauge 4. This embodiment ensures the coaxiality of the force axis very well. The operation is simple and easy to understand. The calibration of the force gauge 100 to be calibrated is completed by using the comparison measurement method.

[0036] Furthermore, the force gauge calibration and testing fixture has a simple structure, reducing production costs and solving the problem of ensuring series coaxiality in actual calibration activities, thus meeting the verification requirements in the verification procedure. This force gauge calibration and testing fixture offers accurate and reliable measurements, is flexible and convenient to use, covers a wide range of applications, reduces the impact of measurement uncertainty caused by calibration activities, and improves calibration efficiency.

[0037] Furthermore, the bracket 1 also includes multiple support columns 13, the bottom end of the support column 13 is connected to the bearing plate 11, and the top end of the support column 13 is connected to the top plate 12, so that the top plate 12 is positioned above the bearing plate 11.

[0038] The connecting rod 2 is used to place the force measuring instrument 100 to be calibrated between the standard force measuring instrument 4 and the connecting rod 2. Preferably, the connecting rod 2 is vertically connected to the top plate 12 along the height direction. By adjusting the height of the connecting rod 2, the distance between the connecting rod 2 and the standard force measuring instrument 4 can be adjusted according to the size of the force measuring instrument 100 to be calibrated. This embodiment can accommodate force measuring instruments 100 of various sizes and models to be calibrated, and has high versatility.

[0039] In this embodiment, the top plate 12 is provided with a first threaded hole, and the connecting rod 2 is provided with an external thread 21. The connecting rod 2 is threadedly connected to the first threaded hole, and the height can be adjusted when the connecting rod 2 rotates relative to the first threaded hole. In other embodiments, the top plate 12 can be raised and lowered by connecting multiple support columns 13. The support columns 13 can be threadedly connected to the top plate 12 to achieve the raising and lowering of the top plate 12. It can also adjust the distance between the connecting rod 2 and the standard force gauge 4, and adapt to various models and sizes of force gauges 100 to be calibrated.

[0040] In this embodiment, the force-applying component 3 is a double-acting manual hydraulic pump. This pump can apply tension or pressure to the standard force gauge 4. When the pump applies tension, it can calibrate the tension of the force gauge 100 to be calibrated. Conversely, when it applies pressure, it can calibrate the pressure of the force gauge 100. This embodiment achieves bidirectional calibration of the force gauge 100 under both tension and pressure. Furthermore, the double-acting manual hydraulic pump can apply high-force loads, solving the problem of difficulty in applying high-force tension and pressure loads and meeting the large-range testing requirements of the force gauge 100.

[0041] Furthermore, the force gauge calibration and testing fixture also includes a workbench 5, which is located on one side of the support 1. The double-acting manual hydraulic pump includes a hydraulic cylinder 31 and a manual control switch 32. The hydraulic cylinder 31 is mounted on the support plate 11, and the manual control switch 32 is mounted on the workbench 5. The workbench 5 raises the height of the manual control switch 32, making it easier for the operator to operate. The operator can switch between the tension and pressure of the hydraulic cylinder 31 and adjust the magnitude of the applied force using the manual control switch 32. It should be noted that the double-acting manual hydraulic pump is existing technology, and its specific structure and working principle will not be described in detail here.

[0042] Preferably, when the force measuring instrument 100 to be calibrated is subjected to a tensile test, the force measuring instrument calibration test fixture also includes multiple connecting parts. The connecting rod 2 is connected to the force measuring instrument 100 to be calibrated, the force measuring instrument 100 to be calibrated is connected to the standard force measuring instrument 4, and the standard force measuring instrument 4 is connected to the force applying component 3 through the connecting parts.

[0043] It should be noted that the type of connector can be adapted to the structure of the connection between the connecting rod 2, the force gauge 100 to be calibrated, and the standard force gauge 4. The connector adopts threaded connection or pin connection to the connecting rod 2, the force gauge 100 to be calibrated, and the standard force gauge 4. By designing universal and special connectors, it can be applied to force gauges 100 with various structures.

[0044] For example, the connector is threaded to the bottom of the connecting rod 2, and the bottom of the connecting rod 2 is provided with a second threaded hole, which the connecting rod 2 can be threaded into. The force measuring instrument 100 to be calibrated is provided with a first pin hole, and the connector is provided with a connecting groove. The opposite side wall of the connecting groove is provided with a second pin hole. The force measuring instrument 100 to be calibrated extends into the connecting groove. The first pin hole and the second pin hole are coaxially arranged, and the pin passes through one second pin hole, the first pin hole, and the other second pin hole in sequence, so that the connector is connected to the force measuring instrument 100 to be calibrated by the pin.

[0045] It should be noted that this embodiment also provides calibration steps for the force gauge 100 to be calibrated, as follows:

[0046] Step 1: Determine the loading method of the force gauge 100 to be calibrated (the loading method is tension, compression, or both tension and compression) according to the performance of the force gauge 100 or its instruction manual.

[0047] Step 2: Select a standard force gauge 4 with a matching range according to the range of the force gauge 100 to be calibrated. The range of the standard force gauge 4 can be 10% to 100% of the effective range of the force gauge 100 to be calibrated.

[0048] Step 3: Select the corresponding connectors according to the model of the force gauge 100 to be calibrated and the model of the standard force gauge 4.

[0049] Step 4: Install the series connection in the following order: bearing plate 11, hydraulic cylinder 31, standard force gauge 4, force gauge to be calibrated 100, connecting rod 2, and top plate 12.

[0050] Step 5: After the series connection is complete, select five calibration points (20%, 40%, 60%, 80%, and 100%) evenly within the range of the force gauge 100 to be calibrated. Apply force from low to high. Once the applied force reaches the calibration point and stabilizes, read the readings of the standard force gauge 4 and the force gauge 100 to be calibrated, respectively. Repeat this process until all five calibration points are reached. Perform the calibration three times at each point and record three sets of data. If the force gauge 100 to be calibrated is bidirectional, calibration is required in both directions.

[0051] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A force gauge calibration and testing fixture, characterized in that, include: A support (1) comprising a support plate (11) and a top plate (12), the top plate (12) being located above the support plate (11); A connecting rod (2) is connected to the top plate (12), and the bottom end of the connecting rod (2) is used to connect to one end of the force measuring instrument (100) to be calibrated; Force-applying component (3) is disposed on the bearing plate (11); A standard force gauge (4) is provided, with one end connected to the output end of the force application component (3) and the other end connected to the other end of the force gauge (100) to be calibrated. The force axis of the force measuring instrument to be calibrated (100), the force axis of the standard force measuring instrument (4), and the force axis of the force applying component (3) extend along the height direction and are coaxially arranged.

2. The force gauge calibration and testing fixture according to claim 1, characterized in that, The connecting rod (2) is vertically and vertically connected to the top plate (12) along the height direction.

3. The force gauge calibration and testing fixture according to claim 2, characterized in that, The top plate (12) is provided with a first threaded hole, and the connecting rod (2) is provided with an external thread (21). The connecting rod (2) is threadedly connected to the first threaded hole.

4. The force gauge calibration and testing fixture according to claim 1, characterized in that, The bracket (1) also includes a plurality of support columns (13), the bottom end of the support column (13) is connected to the bearing plate (11), and the top end of the support column (13) is connected to the top plate (12).

5. The force gauge calibration and testing fixture according to claim 1, characterized in that, The force-applying component (3) is a double-acting manual hydraulic pump, which can apply tension or pressure to the standard force gauge (4).

6. The force gauge calibration and testing fixture according to claim 5, characterized in that, It also includes a workbench (5), which is located on one side of the support (1). The double-acting manual hydraulic pump includes a hydraulic cylinder (31) and a manual control switch (32). The hydraulic cylinder (31) is located on the support plate (11), and the manual control switch (32) is located on the workbench (5).

7. The force gauge calibration and testing fixture according to any one of claims 1-6, characterized in that, It also includes multiple connectors, and the connecting rod (2) is connected to the force measuring instrument (100) to be calibrated, the force measuring instrument (100) to be calibrated is connected to the standard force measuring instrument (4), and the standard force measuring instrument (4) is connected to the force applying component (3) through the connectors.

8. The force gauge calibration and testing fixture according to claim 7, characterized in that, The connector is connected to the connecting rod (2), the force measuring instrument to be calibrated (100), and the standard force measuring instrument (4) by means of threaded connection or pin connection.

9. The force gauge calibration and testing fixture according to claim 7, characterized in that, The force measuring instrument (100) to be calibrated is provided with a first pin hole, the connector is provided with a connecting groove, and the connecting groove is provided with a second pin hole on the opposite side wall. The force measuring instrument (100) to be calibrated can extend into the connecting groove so that the first pin hole and the second pin hole are coaxially arranged, and the pin is sequentially inserted through one second pin hole, the first pin hole and the other second pin hole.

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