A hardness standard having a plurality of hardness indicating zones

Abstract

This invention provides a hardness standard component with multiple hardness indicator areas, comprising a standard component base, multiple hardness sleeves, and multiple isolation rings. The standard component base includes an inner shaft, through which the multiple hardness sleeves pass. The isolation rings are sleeved on the inner shaft and used to separate adjacent hardness sleeves. The surface hardness of each hardness sleeve is different. This hardness standard component with multiple hardness indicator areas has the advantages of having multiple hardness indicator areas in a single component, being able to replace multiple hardness standard components, and being easier to apply to automated testing conditions.

Description

Technical Field

[0001] This utility model relates to the field of standard instrument technology, specifically to a hardness standard part having multiple hardness indication zones. Background Technology

[0002] The national standard GB / T22838.5-2009 "Determination of Physical Properties of Cigarettes and Filters" specifies the requirements for determining the hardness of cigarettes. The determination of cigarette hardness relies on the radial pressure applied by a pressure instrument. The principle is to use the applied radial pressure to cause slight deformation in the local area of ​​the cigarette and filter. The magnitude of the radial deformation displacement can be used to characterize the hardness properties of cigarettes and filter.

[0003] This measurement method requires high precision from the pressure instruments, especially the pressure sensors, which need to be calibrated regularly to maintain relatively high accuracy.

[0004] Hardness standard parts are standard instruments used to calibrate pressure instruments. They are usually made in the shape of cigarettes and use a set of hardness standard bars to construct a gradient of hardness indexes, thereby performing multi-gradient calibration of pressure instruments.

[0005] However, such a design scheme involves a large number of hardness standard parts, which are cumbersome to use and not conducive to simplification. Moreover, as the automation level of the entire tobacco industry increases, how to improve the ease of use of hardness standard parts and make them more suitable for the requirements of automated testing production lines is a new challenge for those skilled in the art.

[0006] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a hardness standard with multiple hardness indicator areas, which can replace multiple hardness standard parts and is more easily applied to automated testing conditions.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is: a hardness standard part with multiple hardness indication areas, including a standard part base, multiple hardness sleeves and multiple isolation rings;

[0009] The standard component base includes an inner shaft, multiple hardness sleeves are inserted through the inner shaft, and the isolation ring is sleeved on the inner shaft and used to separate two adjacent hardness sleeves.

[0010] The hardness values ​​of each of the aforementioned hardness blocks are different.

[0011] Based on the above, the surface hardness value of each of the hardness blocks varies in a gradient along the axial direction.

[0012] Based on the above, the hardness block includes an inner liner and an outer ring, the inner liner being used to support the outer ring, and the thickness of the outer ring being less than one-third of the thickness of the inner liner.

[0013] Based on the above, the material of the inner liner is an elastic material.

[0014] Based on the above, the material of the inner liner is rubber or shape memory alloy.

[0015] Based on the above, the outer ring is made of silicone rubber, polyurethane elastomer, or deformation memory polymer.

[0016] Based on the above, the inner liner and the outer ring are bonded together with epoxy resin adhesive or polyurethane adhesive.

[0017] Based on the above, the standard component base also includes a first base and a second base disposed at both ends of the inner shaft. The first base is integrally formed with the inner shaft, and the second base is provided with a threaded hole relative to the inner shaft. The mating end of the inner shaft is provided with a corresponding external thread.

[0018] Based on the above, the material of the standard component is metal.

[0019] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model has the following advantages:

[0020] By adopting a single-piece structure, multiple hardness blocks are installed at intervals on a single standard component, allowing different hardness indication areas to be used on a single standard component. This enables a single hardness standard component to achieve the functions of multiple hardness standard components in traditional solutions, improving integration. During use, the number of hardness standard components can be reduced, and under the same batch of working conditions, even a single hardness standard component can meet all calibration requirements.

[0021] Since a single hardness standard can replace the function of multiple hardness standard parts, in the automation solution, only one mechanism needs to be designed to carry the single hardness standard to switch positions, which greatly reduces the automation difficulty of replacing standard parts in the traditional solution. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of a hardness standard component with multiple hardness indicator zones in this utility model.

[0023] Figure 2 This is a cross-sectional view of a hardness standard component with multiple hardness indicator zones in this utility model.

[0024] In the figure: 1. Hardness sleeve; 2. Isolation ring; 3. Inner shaft; 4. First base; 5. Second base; 11. Inner liner; 12. Outer ring. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0026] like Figure 1 and Figure 2 As shown, a hardness standard component with multiple hardness indicator areas includes a standard component base, multiple hardness sleeves 1, and multiple isolation rings 2.

[0027] In this embodiment, the standard component base includes an inner shaft 3, a first base 4, and a second base 5. The first base 4 and the inner shaft 3 are integrally formed. The connecting end of the second base 5 is provided with a threaded hole, and the corresponding end of the inner shaft 3 is provided with an external thread. The second base 5 and the inner shaft 3 are locked by a threaded connection. The material can be a technical material.

[0028] Multiple hardness blocks 1 are inserted through the inner shaft 3, and the isolation ring 2 is sleeved on the inner shaft 3 and used to separate two adjacent hardness blocks 1. The surface hardness of each hardness block 1 is different.

[0029] In this embodiment, in order to make the use of the hardness standard parts more scientific and reasonable, the hardness values ​​of each of the hardness blocks 1 vary along the axial direction. During use, the hardness calibration work can be carried out by adjusting them one by one.

[0030] In the design of the hardness sleeve block, in this embodiment, the hardness sleeve block 1 includes an inner liner 11 and an outer ring 12. The inner liner 11 is used to support the outer ring 12, and the thickness of the outer ring 12 is less than one-third of the thickness of the inner liner 11.

[0031] In other embodiments, the material of the hardness block 1 can also be a single material that is integrally formed. Gradient changes can be formed by selecting different materials or designing different densities. For example, a single material with a honeycomb structure can be used, but the honeycomb density between adjacent materials is different, so that the hardness has a gradient change.

[0032] In this embodiment, the hardness value is changed by utilizing the combination of the inner liner 11 and the outer ring 12. Specifically, the material of the inner liner 11 is an elastic material.

[0033] When an elastic material is selected, the material of the inner liner is rubber or shape memory alloy, which is characterized by high elasticity and high recovery ability. Since the main function of the inner liner is to provide support, it is not advisable to select a material that is too soft.

[0034] In this embodiment, the outer ring 12 is made of silicone rubber, polyurethane elastomer, or shape memory polymer. Silicone rubber has the characteristics of high resilience and strong deformation recovery after compression. Polyurethane elastomer has the characteristics of controllable hardness and moderate elasticity. Shape memory polymer can maintain stable compression performance within a certain temperature range. Therefore, they are all suitable for the application conditions of the outer ring 12.

[0035] In addition to the choice of materials, the thickness design of the outer ring 12 is also a configuration indicator for changing the hardness index. By using the combination of these material designs, more hardness indicators can be achieved.

[0036] In terms of connection method, the inner liner 11 and the outer ring 12 are bonded together with epoxy resin adhesive or polyurethane adhesive, which has the advantages of high-strength adhesion and does not affect the hardness transfer.

[0037] Technical principle explanation:

[0038] The process of using standard parts is the same as the testing process of hardness testing equipment. When using the standard parts provided in this embodiment for calibration, a hardness testing platform is required.

[0039] Taking the automated completion of gradient hardness calibration as an example, a robotic arm capable of advancing or retreating in the horizontal and axial directions is required. The first hardness test piece is placed on the station of the hardness testing equipment to collect calibration data. Then, the standard piece is moved horizontally to place the second hardness test piece on the station of the hardness testing equipment to collect calibration data a second time. This process is repeated until all hardness test pieces have collected calibration data. After all the data is collected, the standard piece is returned to its original position. The hardness testing equipment then calibrates its own accuracy based on the collected calibration data, thus completing the calibration task.

[0040] To automate traditional calibration methods, robotic arms are required to perform complex operations such as identifying, replacing, and transferring standard bars. This is technically more challenging, and the investment is too high, the frequency is too low, and it lacks economic viability, which does not align with the original intention of automation.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A hardness standard having a plurality of hardness indicating zones, characterized by: Includes a standard component base, multiple hardness blocks, and multiple isolation rings; The standard component base includes an inner shaft, multiple hardness sleeves are inserted through the inner shaft, and the isolation ring is sleeved on the inner shaft and used to separate two adjacent hardness sleeves. The surface hardness of each of the aforementioned hardness blocks is different.

2. The hardness standard with multiple hardness indicating zones of claim 1, wherein: The surface hardness value of each of the hardness blocks varies in a gradient along the axial direction.

3. The hardness standard with multiple hardness indicating zones of claim 1 or 2, wherein: The hardness block includes an inner liner and an outer ring. The inner liner supports the outer ring, and the thickness of the outer ring is less than one-third of the thickness of the inner liner.

4. The hardness standard with multiple hardness indicating zones of claim 3, wherein: The inner lining is made of an elastic material.

5. The hardness standard of claim 4, wherein: The material of the inner liner is rubber or shape memory alloy.

6. The hardness standard of claim 3, wherein: The outer ring is made of silicone rubber, polyurethane elastomer, or deformation memory polymer.

7. The hardness standard of claim 3, wherein: The inner liner and the outer ring are bonded together with epoxy resin adhesive or polyurethane adhesive.

8. The hardness standard part having multiple hardness indicator zones according to claim 1, 2, 4, 5, or 6, characterized in that: The standard component base also includes a first base and a second base disposed at both ends of the inner shaft. The first base is integrally formed with the inner shaft, and the second base is provided with a threaded hole relative to the inner shaft. The mating end of the inner shaft is provided with a corresponding external thread.

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