Clamping device for observing tobacco sheets

Abstract

The utility model relates to the field of reconstituted tobacco detection equipment, in particular to a clamping device used for observing tobacco sheets, and the clamping device suitable for the tobacco field is designed by arranging a magnetic suction clamping assembly according to the characteristics of the tobacco sheets and can assist observation of an optical microscope. The magnetic suction clamping assembly mainly has the magnetic suction effect of the clamping arms and the clamping buckles, the tobacco sheets can be installed without being damaged, and the tobacco sheets are more convenient to assemble and disassemble through the magnetic suction matching mode; the magnetic suction clamping assembly is further provided with a micrometer, the micrometer can drive the clamping arm-tobacco sheet-clamping buckle assembly to continuously rotate by 360 degrees through a precise pivotal bearing, and positioning at any angle is achieved in cooperation with an angle scale ring.

Description

Technical Field

[0001] This patent relates to the field of reconstituted tobacco leaf testing equipment, specifically to a clamping device for observing tobacco sheets. Background Technology

[0002] Reconstituted tobacco, also known as tobacco sheets, refers to a recycled product made from waste materials such as tobacco stems, dust, and broken tobacco leaves discarded during cigarette manufacturing. It is produced in sheet or filament form and used as a filling material for cigarettes. Reconstituted tobacco plays a crucial role in cigarette production, not only reducing costs but also improving the intrinsic quality of cigarettes. The manufacture of reconstituted tobacco began in the 1950s, primarily using the slurry process, roll pressing, and papermaking process. The papermaking process is further divided into wet and dry papermaking. Compared to the currently produced roll pressing and slurry process reconstituted tobacco, papermaking reconstituted tobacco has unique advantages, including lower density and higher filling value; better mechanical processing resistance and higher filament yield; faster combustion speed and lower tar release; and better product plasticity.

[0003] Quality inspection is usually required for the tobacco sheets after production. The appearance of the tobacco sheets is an important indicator for judging their quality and condition. By observing the appearance of the tobacco sheets, we can also infer the manufacturing process, storage conditions and degree of heating of the tobacco sheets to a certain extent. Using an optical microscope to conduct optical inspection on the tobacco sheets can clearly, accurately and stably observe the appearance of the tobacco sheets.

[0004] Optical microscopes are widely used in many fields such as geology, chemistry, biology, medicine, pharmacy, and pathology. The stage, as a crucial component of an optical microscope, serves to support and fix thin slides. Currently, the most widely used stages are fixed stages, circular graduated stages, and XY-adjustable stages. Fixed stages are typically fixed to the microscope arm and cannot be moved. They are equipped with slide clips to hold the slides in place. While this type of stage has a simple structure, the slides cannot be moved mechanically; the position can only be adjusted manually to change the field of view, resulting in limited flexibility. It is mostly used in biological laboratories for observing simply prepared tissue slides.

[0005] However, tobacco sheets produced in the tobacco industry are relatively thin and soft, making them difficult to place stably on the stage. When side observation is required, the position of the tobacco sheet must be frequently adjusted and fixed. Tobacco sheets are also small in size and light in weight, making them prone to shifting due to minor changes such as vibrations in the environment after being placed on the stage. This requires a lot of time to reposition, adjust the light, and refocus. Furthermore, the texture and color of tobacco sheets are relatively uniform, making it difficult to find reference objects after magnification under an optical microscope. When observing multiple points, it is easy to repeat or miss observation points.

[0006] Due to the characteristics of tobacco sheets, existing optical microscopes and auxiliary clamping devices are prone to damaging the tobacco sheets during frequent adjustments of the observation angle, and are not entirely suitable for observing tobacco sheets. Therefore, there is a need for a clamping device that is designed based on the characteristics of tobacco sheets, does not easily damage the tobacco sheets, and assists in observing the sides of the tobacco sheets. Utility Model Content

[0007] To improve the convenience and accuracy of inspecting tobacco sheets under an optical microscope, this patent provides the following technical solution:

[0008] First aspect: A clamping device for observing tobacco sheets, comprising a magnetic clamping assembly and a track assembly, wherein the magnetic clamping assembly is disposed on the track assembly such that the position of the magnetic clamping assembly can be changed by sliding; the magnetic clamping assembly includes a clamping arm and a clamping buckle, wherein the tobacco sheet is placed between the clamping arm and the clamping buckle and is fixed by the magnetic attraction of the clamping buckle and the clamping arm.

[0009] Furthermore, the magnetic clamping assembly also includes a micrometer, which allows the tobacco sheet to rotate 360° to adjust its circumferential position.

[0010] Furthermore, the magnetic clamping assembly also includes a bearing for connecting the micrometer and the clamping arm.

[0011] Furthermore, the magnetic clamping assembly also includes a bearing platform and a bearing housing, with the bearing platform and bearing housing used to accommodate a portion of the track assembly.

[0012] Furthermore, the thickness of the tobacco sheet is 0.15–0.20 mm, 0.20–0.25 mm, or 0.25–0.30 mm.

[0013] Furthermore, the clamping arm is made of a ferromagnetic material, and the clamping arm is selected from one of FeNi(Mo), FeSi, FeAl, Fe, Ni, Co, AlNi(Co), FeCr(Co), FeCrMo, FeAlC, FeCo, Re-Co, Re-Fe, FeCrCo, PtCo, MnAlC, CuNiFe, MnBi, AlMnAg, FeSiAl, carbonyl iron, or ferrite.

[0014] Furthermore, the clamping buckle is made of ferromagnetic material, and the clamping buckle is selected from one of FeNi(Mo), FeSi, FeAl, Fe, Ni, Co, AlNi(Co), FeCr(Co), FeCrMo, FeAlC, FeCo, Re-Co, Re-Fe, FeCrCo, PtCo, MnAlC, CuNiFe, MnBi, AlMnAg, FeSiAl, carbonyl iron, or ferrite.

[0015] Furthermore, the track assembly includes a base, a lead screw, a lead screw head, and a scale. The lead screw is mounted on the base along the axial direction, the lead screw head is located at both ends of the lead screw, and the scale is located on the side of the base along the axial direction.

[0016] Furthermore, the magnetic clamping assembly can slide along the axial direction on the lead screw.

[0017] Furthermore, the clamping device is placed on the observation device, and the position of the tobacco sheet is adjusted by the clamping device in order to change the observation angle of the tobacco sheet.

[0018] This patent has the following beneficial effects:

[0019] 1. This patent relates to the field of reconstituted tobacco leaf testing equipment, specifically to a clamping device for observing tobacco sheets. Based on the characteristics of tobacco sheets, a clamping device suitable for the tobacco field is designed by setting up a magnetic clamping component, which can assist in the observation of optical microscopes.

[0020] 2. The magnetic clamping component in this patent mainly relies on the magnetic attraction of the clamping arm and the clamping buckle, which can install tobacco sheets without damaging them, and the magnetic attraction makes loading and unloading tobacco sheets more convenient.

[0021] 3. The magnetic clamping assembly in this patent is also equipped with a micrometer. The micrometer can drive the clamping arm-tobacco sheet-clamping buckle assembly to rotate continuously 360° through a precision rotary bearing. With the help of the angle scale ring, it can achieve arbitrary angle positioning. A single clamping can complete the observation of the entire surface in the circumferential direction without the need for multiple sample loading and unloading. This eliminates the defects of traditional clamps that require repeated disassembly and adjustment of angles, and shortens the observation cycle.

[0022] 4. The clamping mechanism is equipped with a micrometer, lead screw head and scale, with precise graduations, which allows the sample assembly to be positioned arbitrarily in the axial and circumferential directions to adjust the observation angle and avoid repeated or missed observations.

[0023] Tobacco sheets can be manufactured using existing manufacturing processes in the art, such as rolling, slurry processing, and papermaking, to include an aerosol-forming matrix for homogenizing tobacco sheets in aerosol-generating articles.

[0024] In this patent, sheet refers to a layered element having a width and length substantially greater than its thickness.

[0025] In this patent, the aerosol forming matrix comprises a textured sheet of aggregated homogeneous tobacco material.

[0026] In this patent, textured sheet refers to a sheet that has been rolled, embossed, stamped, perforated, or otherwise deformed. The aerosol forming matrix may include an aggregate of textured sheets of homogeneous tobacco material, comprising a plurality of spaced notches, protrusions, perforations, or combinations thereof.

[0027] Preferably, the aerosol forming matrix comprises aggregated rolled sheets of homogeneous tobacco material. The use of textured sheets of homogeneous tobacco material can advantageously promote the aggregation of the homogeneous tobacco material sheets to form the aerosol forming matrix.

[0028] In this patent, "curled sheet" refers to a sheet having a plurality of substantially parallel ridges or folds. Preferably, when the aerosol-forming article has been assembled, the substantially parallel ridges or folds extend along or parallel to the longitudinal axis of the aerosol-forming article. This advantageously promotes the aggregation of the curled sheet of homogeneous tobacco material to form an aerosol-forming matrix.

[0029] However, it will be understood that the rolled sheet of homogeneous tobacco material used in the aerosol-generated article may alternatively or additionally have a plurality of substantially parallel ridges or wrinkles arranged at an acute or obtuse angle to the longitudinal axis of the aerosol-generated article when the aerosol-generated article has been assembled.

[0030] An outside micrometer, also called a screw micrometer, is often simply referred to as a "micrometer". It is a more precise length measuring instrument than a vernier caliper, with accuracies of 0.01mm, 0.02mm, and 0.05mm. Including the estimated reading of 1 decimal place, it can be read to the 3rd decimal place (thousandths), hence the name micrometer.

[0031] A micrometer consists of a fixed frame, anvil, micrometer screw, fixed sleeve, micrometer thimble, force measuring device, and locking device. The fixed sleeve has a horizontal line with two rows of graduations spaced 1 mm apart, one above and one below. The upper graduation is positioned precisely between two adjacent lower graduations. The micrometer thimble is a horizontal line dividing the circumference into 50 equal parts; it rotates.

[0032] According to the principle of helical motion, when the micrometer drum rotates one revolution, the micrometer screw advances or retreats by one pitch, which is 0.5 mm. Thus, when the micrometer drum rotates one division, it has rotated 1 / 50 of a revolution. At this time, the screw moves along the axis by 1 / 50 × 0.5 mm = 0.01 mm. Therefore, a micrometer can accurately read a value of 0.01 mm.

[0033] A lead screw is a transmission component that converts rotary motion into linear motion, and is an important element used to complete feed motion. The lead screw must not only accurately transmit motion, but also transmit a certain amount of power. As a high-precision component, the lead screw precisely determines the coordinate position of the worktable, converts rotary motion into linear motion, and also transmits a certain amount of power; therefore, it has high requirements in terms of precision, strength, and wear resistance.

[0034] Screws can be classified into three categories according to their friction characteristics: sliding screws, rolling screws, and hydrostatic screws.

[0035] The tooth profile of sliding lead screws is mostly trapezoidal. This tooth profile has advantages over triangular tooth profiles, such as higher efficiency, better transmission performance, higher precision, and easier processing. Due to the simple structure and ease of manufacturing of sliding lead screws, they are widely used in machine tools.

[0036] Rolling screws are divided into two main categories: ball screws and roller screws. Compared with roller screws, ball screws have less friction, higher transmission efficiency, and higher precision, and are therefore more commonly used, but their manufacturing process is more complex.

[0037] Hydrostatic screws have many advantages and are often used in the feed mechanisms of precision machine tools and CNC machine tools. The thread profile of hydrostatic screws is the same as that of standard trapezoidal threads, but the profile is 1.5 to 2 times higher than that of standard threads of the same specification. The purpose is to obtain good oil seal and improve load-bearing capacity.

[0038] Ferromagnetic materials (FM) are materials that can respond to magnetic fields in a certain way. Ferromagnetic materials belong to strongly magnetic materials. For magnetic materials, magnetization curves and hysteresis loops are characteristic curves reflecting their basic magnetic properties. Magnetic materials are generally divided into soft magnetic materials and hard magnetic materials according to their ease of magnetization.

[0039] Hard magnetic materials, also known as permanent magnets or constant magnetic materials, are materials that, after being magnetized by an external magnetic field, retain some or most of their original magnetization direction even under a considerably strong reverse magnetic field. These materials require high remanent magnetic induction, strong coercivity (i.e., resistance to demagnetization), and a large magnetic energy product (i.e., the magnetic field energy supplied to space).

[0040] Permanent magnet materials are classified into three categories: alloys, ferrites, and intermetallic compounds. ① Alloys: These include cast, sintered, and machinable alloys. Major cast alloys include AlNi(Co), FeCr(Co), FeCrMo, FeAlC, and FeCo(V)(W); sintered alloys include Re-Co (Re represents rare earth elements), Re-Fe, and AlNi(Co), FeCrCo, etc.; machinable alloys include FeCrCo, PtCo, MnAlC, CuNiFe, and AlMnAg, etc. The latter two, with lower BHC, are also called semi-permanent magnet materials. ② Ferrites: The main components are composites such as Mo·6Fe2O3. ③ Intermetallic compounds: Primarily represented by MnBi.

[0041] Soft magnetic materials refer to materials where magnetization occurs when the coercivity is no greater than 1000 A / m; such materials are called soft magnets. Soft magnetic materials have very low remanence and coercivity, meaning their hysteresis loop is very narrow, almost coinciding with the fundamental magnetization curve. These soft magnetic materials are suitable for use as the cores of inductors, transformers, relays, and motors.

[0042] Soft magnetic materials can be broadly classified into four categories: ① Alloy ribbons or sheets: FeNi(Mo), FeSi, FeAl, etc. ② Amorphous alloy ribbons: Fe-based, Co-based, FeNi-based, or FeNiCo-based materials with appropriate Si, B, P, and other doping elements, also known as magnetic glass. ③ Iron powder cores: FeNi(Mo), FeSiAl, carbonyl iron, and ferrite powders, which are coated and bonded with an electrically insulating dielectric and then pressed into shape as required. ④ Ferrites: including spinel type—MO·Fe2O3, where M represents NiZn, MnZn, MgZn, CaZn, etc.; and magnetoplumb type—Ba3Me2Fe. 24 O 41 . Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of this patent, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this patent and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a three-dimensional schematic diagram of a portion of the magnetic clamping component of this patent;

[0045] Figure 2 This is a three-dimensional schematic diagram of the bearing platform of this patent;

[0046] Figure 3 This is a three-dimensional schematic diagram of the bearing platform, bearing, and clamping arm of this patent.

[0047] Figure 4 This is a three-dimensional schematic diagram of the clamping device of this patent.

[0048] The reference numerals in the attached figures are explained as follows:

[0049] 100: Magnetic clamping assembly;

[0050] 110: Bearing stand;

[0051] 111: Base;

[0052] 112: Neck;

[0053] 113: Head;

[0054] 114: Receptacle cavity;

[0055] 115: Bolt hole;

[0056] 120: Bearing housing;

[0057] 130: Bearing;

[0058] 140: Clamping arm;

[0059] 141: First part;

[0060] 142: Tail;

[0061] 150: Clamping buckle;

[0062] 160: micrometer;

[0063] 161: Knob;

[0064] 200: Track assembly;

[0065] 210: Base;

[0066] 220: Lead screw;

[0067] 230: Lead screw head;

[0068] 240: Ruler. Detailed Implementation

[0069] The detailed features and advantages of this patent are described below in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this patent and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this patent.

[0070] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0071] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not indicate the only possible implementation. The terms "upper," "lower," etc., indicating orientation or positional relationships are defined with reference to the coordinates of the accompanying drawings and are only for the convenience of describing this patent and simplifying the description, 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, and therefore should not be construed as a limitation of this patent. The terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this patent belongs. The terminology used herein in the specification of this patent is for the purpose of describing particular embodiments only and is not intended to be limiting of this patent. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0073] To make the objectives, technical solutions, and advantages of this patent clearer, the embodiments of this patent will be described in further detail below with reference to the accompanying drawings.

[0074] A clamping device for observing tobacco sheets includes a magnetic clamping assembly 100 and a track assembly 200. The magnetic clamping assembly 100 is disposed on the track assembly 200 such that the position of the magnetic clamping assembly 100 on the track assembly 200 can be changed by sliding.

[0075] Please refer to Figure 1 The magnetic clamping assembly 100 includes a bearing 130 frame, a bearing 130, a micrometer 160, a clamping arm 140, and a clamping buckle 150.

[0076] The bearing 130 frame is shaped like a "stamp", that is, it has a rectangular structure with a raised part on the top surface. The upper part of the bearing 130 frame is the bearing platform 110 and the lower part is the bearing seat 120. The bearing platform 110 and the bearing seat 120 are fixedly connected by bolts. The bearing seat 120 has a concave structure. After being fixedly connected to the bearing platform 110, the concave cavity is used to accommodate part of the track assembly 200. When the magnetic clamping assembly 100 needs to be adjusted, only the position of the concave cavity on the track assembly 200 needs to be adjusted.

[0077] Please refer to Figure 2 The bearing platform 110 has a rectangular base 111 at its bottom. A target-shaped protrusion extends upward from the center of the base 111. The connection between the target-shaped protrusion and the base 111 is the neck 112. The neck 112 has a ring structure on top. The extension line of the center of the ring structure is perpendicular to the extension line of the neck 112. The ring structure is the head 113 of the target-shaped protrusion. The cavity in the middle of the ring structure is the receiving cavity 114. The receiving cavity 114 contains a bearing 130, which is a cylindrical structure.

[0078] The bearing platform 110 and bearing housing 120 are made of corrosion-resistant materials, such as martensitic steel, ferritic steel, austenitic steel, austenitic-ferritic stainless steel, precipitation hardening stainless steel, chromium stainless steel, chromium-nickel stainless steel or chromium-manganese-nitrogen stainless steel, but this patent is not limited to these.

[0079] Please refer to Figure 3 The bearing 130 is connected to a micrometer 160 and a clamping arm 140 by threads along the axial direction. The clamping arm 140 is located on the front side of the bearing 130, while the micrometer 160 is located on the rear side of the bearing 130.

[0080] Specifically, the clamping arm 140 is made of a ferromagnetic material, and the clamping arm 140 is selected from one of FeNi(Mo), FeSi, FeAl, Fe, Ni, Co, AlNi(Co), FeCr(Co), FeCrMo, FeAlC, FeCo, Re-Co, Re-Fe, FeCrCo, PtCo, MnAlC, CuNiFe, MnBi, AlMnAg, FeSiAl, carbonyl iron, or ferrite, but this patent is not limited to this.

[0081] Specifically, the clamping buckle 150 is made of ferromagnetic material, and the clamping buckle 150 is selected from one of FeNi(Mo), FeSi, FeAl, Fe, Ni, Co, AlNi(Co), FeCr(Co), FeCrMo, FeAlC, FeCo, Re-Co, Re-Fe, FeCrCo, PtCo, MnAlC, CuNiFe, MnBi, AlMnAg, FeSiAl, carbonyl iron, or ferrite, but this patent is not limited to this.

[0082] The micrometer 160 has a columnar structure. The tail 142 of the micrometer 160 has a striped knob 161. The tail end of the micrometer 160 forms an outwardly convex spherical protrusion. The micrometer 160 can be rotated by rotating the striped knob 161.

[0083] As is easily understood, the bearing 130 and clamping arm 140, which are threadedly connected to the micrometer 160, will rotate synchronously when the micrometer 160 rotates. The clamping arm 140 is a slender cylindrical structure with a magnetized surface and a wedge-shaped clamping surface at its end. The tail 142 of the clamping arm 140 is connected to the bearing 130, and the head 141 of the clamping arm 140 is made of a ferromagnetic material with magnetic attraction. The clamping buckle 150 is covered with a silicone protective layer, with the N pole facing the clamping surface.

[0084] The clamping buckle 150 is magnetically connected to the head 141 of the clamping arm 140, and the clamping buckle 150 is also made of ferromagnetic material with magnetic attraction.

[0085] The bearing base 111 of the bearing platform 110 has four bolt holes 115 near its corners, which are used to fix the bearing housing 120.

[0086] Please refer to Figure 4 The track assembly 200 includes a base 210, a lead screw 220, a lead screw head 230, and a scale 240. The base 210 is located at the bottom and has a structure with a concave cavity. Three lead screws 220 are provided along the axial direction in the concave cavity. The lead screws 220 are slender cylinders. The two ends of the concave cavity of the base 210 are connected to the lead screws 220, and one end is connected to the lead screw head 230. The lead screw head 230 is a striped knob 161. The progress of the lead screws 220 is adjusted by the knob 161. The bottom of the base 210 is provided with a scale 240 facing outward according to the length of the lead screws 220.

[0087] Specifically, the scale is centered on the middle of the side of the base 210, and has a range of 0-50mm on both the left and right sides along the axial direction, with a minimum scale of 0.1mm.

[0088] During assembly, remove the clamping buckle 150 that attracts the clamping arm 140, place the larger side of the tobacco sheet to be observed onto the clamping arm 140, and use the clamping buckle 150 to magnetically attract the clamping arm 140.

[0089] It is easy to understand that tobacco sheets are usually sheet structures, and the thickness of their sidewalls is small, which does not affect the magnetic attraction between the clamping buckle 150 and the clamping arm 140. That is, the tobacco sheet fixed between the clamping buckle 150 and the clamping arm 140 is usually quite stable and not easy to slip off.

[0090] Specifically, the clamping buckle 150 adopts a modular design, and can be replaced with magnets of different diameters to adapt to tobacco sheets of different thicknesses and areas. The size of the clamping buckle 150 can be φ4, φ6, φ8, φ10, or φ12, but this patent is not limited to these.

[0091] After the tobacco sheet is fixed, the ideal observation surface of the tobacco sheet is selected by rotating the knob 161 on the micrometer 160, and the position of the magnetic clamping assembly 100 on the track assembly 200 is adjusted by referring to the scale 240 through the lead screw head 230. The clamping device after positioning is placed on the stage and below the objective lens.

[0092] If it is necessary to adjust the side view of the tobacco sheet later, keep the position of the clamping device and simply adjust the knob 161 to change the side view presented by the rotation angle of the tobacco sheet and the displacement of the magnetic clamping component 100 on the track component 200.

[0093] This patent specification uses directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom" to describe various example structural parts and components of this patent. However, the use of these terms is merely for illustrative purposes and is based on the orientation of the examples shown in the accompanying drawings. Since the embodiments disclosed in this patent can be arranged in different orientations, these directional terms are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or the same as the direction of gravity.

[0094] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this patent will not describe the various possible combinations separately.

[0095] Furthermore, various implementations of this patent can be combined in any way, and as long as they do not violate the spirit of this patent, they should also be regarded as the content disclosed in this patent.

Claims

1. A clamping device for observing tobacco sheets, characterized in that, It includes a magnetic clamping assembly and a track assembly, wherein the magnetic clamping assembly is disposed on the track assembly such that the position of the magnetic clamping assembly can be changed by sliding; The magnetic clamping assembly includes a clamping arm and a clamping buckle. The tobacco sheet is placed between the clamping arm and the clamping buckle and is fixed by the magnetic attraction of the clamping buckle and the clamping arm.

2. The clamping device according to claim 1, characterized in that, The magnetic clamping assembly also includes a micrometer, and the tobacco sheet can be rotated 360° under the action of the micrometer to adjust the position of the tobacco sheet in the circumferential direction.

3. The clamping device according to claim 2, characterized in that, The magnetic clamping assembly also includes a bearing for connecting the micrometer and the clamping arm.

4. The clamping device according to claim 1, characterized in that, The magnetic clamping assembly also includes a bearing platform and a bearing seat, with the bearing platform and the bearing seat used to accommodate a portion of the track assembly.

5. The clamping device according to claim 1, characterized in that, The thickness of the tobacco sheet is 0.15–0.20 mm, 0.20–0.25 mm, or 0.25–0.30 mm.

6. The clamping device according to claim 1, characterized in that, The clamping arm is made of ferromagnetic material and is selected from one of FeNi(Mo), FeSi, FeAl, Fe, Ni, Co, AlNi(Co), FeCr(Co), FeCrMo, FeAlC, FeCo, Re-Co, Re-Fe, FeCrCo, PtCo, MnAlC, CuNiFe, MnBi, AlMnAg, FeSiAl, carbonyl iron, or ferrite.

7. The clamping device according to claim 1, characterized in that, The clamping buckle is made of ferromagnetic material, and the clamping buckle is selected from one of FeNi(Mo), FeSi, FeAl, Fe, Ni, Co, AlNi(Co), FeCr(Co), FeCrMo, FeAlC, FeCo, Re-Co, Re-Fe, FeCrCo, PtCo, MnAlC, CuNiFe, MnBi, AlMnAg, FeSiAl, carbonyl iron, or ferrite.

8. The clamping device according to claim 1, characterized in that, The track assembly includes a base, a lead screw, a lead screw head, and a scale. The lead screw is arranged on the base in an axial direction, the lead screw head is arranged at both ends of the lead screw, and the scale is arranged on the side of the base in an axial direction.

9. The clamping device according to claim 8, characterized in that, The magnetic clamping assembly is capable of sliding along the axial direction on the lead screw.

10. The clamping device according to claim 1, characterized in that, The clamping device is placed on the observation device, and the position of the tobacco sheet is adjusted by the clamping device to change the observation angle of the tobacco sheet.

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