A sampling shear for titanium alloy strip and foil

Abstract

The utility model relates to a kind of sampling scissors for titanium alloy strip and foil, including first scissors handle, second scissors handle, first scissors handle includes first cutting part, first handle part, first connecting part;Second scissors handle includes second cutting part, second handle part, second connecting part;The lower surface of the front end of second cutting part is fixedly provided with annular upper cutting edge, the front end of second cutting part is provided with sample cutting through-hole, the edge of sample cutting through-hole is fixedly provided with annular lower cutting edge corresponding with annular upper cutting edge.The utility model's sampling scissors adopts coaxial circular cutting edge design, there is small diameter difference between upper cutting edge and lower cutting edge;When cutter closes, material forms annular stress zone between two cutting edges, actual shearing force is completed by the joint action of upper cutting edge and lower cutting edge, to eliminate the damage of test sample due to local stress concentration;Using sampling scissors is convenient and fast, and can also obtain test sample with neat edge, no burr and high surface finish.

Description

Technical Field

[0001] This utility model relates to the field of titanium alloy technology, specifically to a sampling shear for titanium alloy strips and foils. Background Technology

[0002] Titanium and titanium alloy foils and strips are widely used in aerospace and precision manufacturing due to their high strength, low density, and excellent corrosion resistance. During the rolling process of titanium and titanium alloys, to ensure the performance of the final product meets requirements, samples need to be taken for physical property testing at each stage. Sampling typically involves cutting samples from the middle section of the sheet or strip (i.e., at 1 / 4 of the rolling direction) to ensure uniformity. These samples then undergo a second shearing process to obtain smaller specimens for testing.

[0003] Due to the high strength and ductility of titanium alloys, traditional straight-blade or flat-blade shears have the following shortcomings in the process of shearing or preparing test samples: the shearing force is concentrated at the blade tip, leading to easy wear of the blade, uneven cuts, and damage to the sample surface; the gap and overlap between the upper and lower blades are difficult to control stably, resulting in large shearing deformation; and large shearing machines / plate shearing machines cannot meet the needs of anytime and anywhere application. Therefore, there is an urgent need for a dedicated sampling shear that is easy to carry, structurally stable, requires less shearing effort, and allows for adjustment of the blade overlap and side clearance. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model proposes a sampling scissor for titanium alloy strip and foil, comprising a first scissor handle and a second scissor handle; the first scissor handle includes a first cutting part, a first grip part, and a first connecting part connecting the first cutting part and the first grip part, and the first scissor handle and the second scissor handle are not on the same plane; the second scissor handle includes a second cutting part, a second grip part, and a second connecting part connecting the second cutting part and the second grip part; the first cutting part is located directly below the second cutting part and is parallel to it, and the first grip part is parallel to the second grip part. An annular upper blade is fixedly provided on the lower surface of the front end of the second cutting part, and a cutting through hole is provided at the front end of the second cutting part. An annular lower blade corresponding to the annular upper blade is fixedly provided on the edge of the cutting through hole, and the annular lower blade is located on the upper surface of the first cutting part. The diameter of the lower annular blade 105 is d1, and the diameter of the upper annular blade is d2, Δd = d1 - d2, and 0.01mm ≤ Δd ≤ 0.05mm, d1 ≤ 20mm; when the sampling shear is in the cutting state, the centers of the lower annular blade and the upper annular blade coincide, forming a staggered shearing structure.

[0005] Furthermore, in the sampling shear for titanium alloy strips and foils described in this utility model, the minimum straight-line distance from the foremost end of the first connecting part to the lower annular blade is L, and L≤400mm.

[0006] Furthermore, in the sampling shear for titanium alloy strips and foils described in this utility model, one surface of the first connecting part and the second connecting part are parallel and fitted together, and are hinged by a pivot module; the pivot module is parallel to the main body of the first cutting part; the first connecting part and the second connecting part can rotate around the pivot module.

[0007] Furthermore, in the sampling shear for titanium alloy strips and foils described in this utility model, the pivot module is a coaxial composite cam-bearing structure. The cam-bearing structure includes: an integrated pivot sleeve, a cam, a cam sleeve, and a thrust bearing and a disc spring providing axial preload. The thrust bearing and the disc spring are coaxially installed inside the integrated pivot sleeve. The cam sleeve is coaxially installed outside the integrated pivot sleeve, and the cam sleeve has an eccentricity e. A roller follower that contacts the outer circle of the cam is provided near the first grip portion. The cam sleeve can be finely adjusted relative to the pivot sleeve to set the blade overlap and side clearance.

[0008] Further, preferably, the pivot module at the overlapping point of the scissors is a coaxial composite "cam-bearing" pivot module. The pivot module assembly includes: an outer ring with an enlarged diameter pivot sleeve (with a shoulder), an internal thrust bearing (two hardened washers + needle rollers / ball bearings), and a disc spring providing 200~600 N preload; an eccentric cam sleeve: coaxial with the pivot, but with an eccentricity e=0.5~1.2 mm relative to the outer circle of the hole axis, and its outer contour is made into a segmented arc / cycloid. The follower is a roller (needle bearing roller Φ6~10 mm) mounted on one side of the handle / connecting rod, contacting the outer circle of the cam. Limiting / calibrating: the outer ring of the pivot has a positioning flat part that fits with the slotted housing to ensure cam phase; the eccentric bushing has a scale for fine-tuning the blade overlap (e.g., 0.1 mm / division). Materials and heat treatment: Pivot 42CrMo, nitrided after quenching and tempering; Roller / washer 100Cr6 / HRC58+; Pivot sleeve HRC40~45; Assembly: First preload until there is no looseness and the rotation is smooth, then tighten to prevent loosening (cotter pin / nylon lock nut).

[0009] Furthermore, in the sampling shear for titanium alloy strips and foils described in this utility model, the pivot module is a pin structure.

[0010] Furthermore, in the sampling shear for titanium alloy strips and foils described in this utility model, the first connecting part is provided with a cylindrical through hole perpendicular to the first cutting part, and the second connecting part is a cylinder perpendicular to the second cutting part and the second handle part; the second connecting part is adapted to the through hole and can slide along the axial direction of the through hole.

[0011] Furthermore, in the sampling shears for titanium alloy strips and foils described in this utility model, a miniature electric cylinder is provided between the first handle and the second handle.

[0012] Furthermore, in the sampling shear for titanium alloy strips and foils described in this utility model, the lower annular blade and the upper annular blade are both made of tungsten steel, or high-speed steel.

[0013] Furthermore, preferably, the inner part of the annular upper blade and the annular upper blade handle is made of alloy steel, the same material as the scissor handle, and the outer part is wrapped with rubber.

[0014] Furthermore, in the sampling shear for titanium alloy strips and foils described in this utility model, the thickness of the first cutting part and the second cutting part is 100~200mm.

[0015] Furthermore, in the sampling shear for titanium alloy strips and foils described in this utility model, the first cutting part and the second cutting part are rectangular.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: This invention provides a sampling shear for titanium alloy strips and foils that is portable and can be used anytime, anywhere. It is convenient to use: large shearing machines / sampling shears can only cut large samples, requiring a second cutting before testing. The sampling shear allows for a single cutting operation to obtain samples directly usable for testing. Titanium and titanium alloys have high strength, while existing portable shears have low strength and cannot cut titanium and titanium alloys effectively. The sampling shear provided by this invention has a sufficient distance L≤400mm from the blade axis to the point where the shears meet, satisfying the sampling requirements for titanium and titanium alloy strips and foils of all widths at the middle of the material (i.e., sampling at 1 / 4 of the distance perpendicular to the rolling direction).

[0017] Furthermore, existing technologies are prone to deformation and edge burrs during shearing due to stress concentration. This shearing tool employs a circular blade design with a slight diameter difference between the upper and lower blades. When the blades are closed, the material forms a ring-shaped stress zone between the two blades, and the actual shearing force is achieved by the combined action of the upper and lower blades. This eliminates damage to the sample caused by localized stress concentration and also reduces wear on the blade tip. The handle and blade tip are designed as a single piece of high-speed steel. The pivot is made of 42CrMo, which has been tempered and nitrided for high strength and toughness. The handle is made of manganese steel, ensuring that the cost remains reasonable while meeting the required performance.

[0018] In addition, the pivot module of this utility model is a coaxial composite cam-bearing structure, replacing the original single rivet / bolt pivot with a large-diameter pivot sleeve: thrust bearing + disc spring preload (eliminating axial / radial clearance, making the overlap point more stable and not wobbling), adjustable eccentric cam sleeve (contacting the roller follower on the handle) to form variable mechanical gain, automatically amplifying the torque at the end of the cutting, which is significantly more labor-saving, and eccentric bushing fine adjustment (also used to adjust the blade edge overlap and side clearance), keeping the blade edge parallel and in contact for a long time, reducing deviation and chipping. This achieves both stable shearing (the large-diameter pivot sleeve diffuses stress from the small-diameter rivet to a larger annular surface, significantly improving anti-tipping stiffness; the thrust bearing (needle roller / ball roller) + disc spring preload provides continuous axial clamping, preventing "shaking" during shearing; double-sided protective ears / thickened washers hold the blade root, resisting "external prying" force, greatly improving the stability of the overlapping point; traditional shears rely on a fixed lever ratio of "long handle / short blade root"); and effort saving (with the addition of the eccentric cam, as you retract the handle, the roller moves along the cam's lift stroke, and the lever arm increases towards the later part of the cut, equivalent to automatic gear shifting). Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the sampling shear structure of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the sampling shear structure of Embodiment 2 of this utility model; Figure 3 This is a top view of the second scissor handle 2 of the sampling scissors in Embodiment 2 of this utility model; Figure 4 This is a top view of the first scissor handle 1 of the sampling scissors in Embodiment 2 of this utility model; Figure 5 This is a top view of the upper blade 205 and lower blade 105 of the sampling shears in Embodiment 2 of this utility model; Among them, 1 is the first scissor handle, 101 is the first cutting part, 103 is the first grip part, 102 is the first connecting part, 105 is the annular lower blade, 1011 is the main body part, 104 is the cylindrical through hole, and 1021 is the front end. 2. Second scissor handle; 201. Second cutting part; 203. Second grip part; 202. Second connecting part; 205. Annular upper blade; 206. Cutting through hole; 3. Hub module; 5. Miniature electric cylinder. Detailed Implementation

[0020] To provide a deeper and clearer understanding of the technical content and effects of this invention, detailed embodiments will be described with reference to the accompanying drawings. It should be noted that the embodiments described are merely one possible implementation of the invention and are not limited to all possible implementations. Under the guidance of this invention, those skilled in the art can derive all alternative implementations without inventive effort, and these alternative implementations also fall within the scope of protection covered by this invention. For parts of the derivational embodiments where conditions are not specifically specified, operation should be performed according to industry-standard conditions or conditions recommended by the manufacturer.

[0021] In the following description, unless otherwise specified, the same reference numerals generally refer to the same or similar elements. The embodiments provided herein do not reflect all implementations of the invention, but are merely exemplary embodiments illustrating apparatuses and methods consistent with certain aspects of the invention. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0022] like Figures 1 to 5 As shown, a sampling scissor for titanium alloy strip and foil of the present invention includes a first scissor handle 1 and a second scissor handle 2; the first scissor handle 1 includes a first cutting part 101, a first grip part 103, and a first connecting part 102 connecting the first cutting part 101 and the first grip part 103, and the first scissor handle 1 and the second scissor handle 2 are not on the same plane; the second scissor handle 2 includes a second cutting part 201, a second grip part 203, and a second connecting part 202 connecting the second cutting part 201 and the second grip part 203; the first cutting part 101 is located directly below the second cutting part 201 and is parallel to it, and the first grip part 103 is parallel to the second grip part 203. An annular upper blade 205 is fixedly provided on the lower surface of the front end of the second cutting part 201. A cutting through hole 206 is provided at the front end of the second cutting part 201. An annular lower blade 105 corresponding to the annular upper blade 205 is fixedly provided on the edge of the cutting through hole 206. The annular lower blade 105 is located on the upper surface of the first cutting part 101. The diameter of the aforementioned annular lower blade 105 is d1, and the diameter of the aforementioned annular upper blade 205 is d2, Δd=d1 - d2, and 0.01≤Δd≤0.05mm, d1≤20mm; when the sampling shear is in the cutting state, the centers of the aforementioned annular lower blade 105 and annular upper blade 205 coincide, forming a layered shearing structure.

[0023] In some embodiments, the minimum straight-line distance from the foremost end portion 1021 of the first connecting portion 102 to the annular lower cutting edge 105 is L, and L≤400mm.

[0024] In some embodiments, one surface of the first connecting portion 102 and the second connecting portion 202 are parallel to each other and are hinged by the pivot module 3; the pivot module 3 is parallel to the main body portion 1011 of the first cutting portion 101; the first connecting portion 102 and the second connecting portion 202 are able to rotate around the pivot module 3.

[0025] In some embodiments, the aforementioned pivot module 3 is a coaxial composite cam-bearing structure, which includes: an integral pivot sleeve, a cam, a cam sleeve, and a thrust bearing and a disc spring that provide axial preload; the thrust bearing and the disc spring are coaxially mounted inside the pivot sleeve; the cam sleeve is coaxially mounted outside the pivot sleeve, and the cam sleeve has an eccentricity e; a roller follower that contacts the outer circle of the cam is provided near the first grip portion 103; the cam sleeve can be finely adjusted relative to the pivot sleeve to set the cutting edge overlap and side clearance.

[0026] In some implementations, the aforementioned hub module 3 is a pin structure.

[0027] In some embodiments, the first connecting portion 102 is provided with a cylindrical through hole 104 perpendicular to the first cutting portion 101, and the second connecting portion 202 is a cylinder perpendicular to the second cutting portion 201 and the second handle portion 203; the second connecting portion 202 is adapted to the through hole 104 and can slide along the axial direction of the through hole 104.

[0028] In some embodiments, a miniature electric cylinder 5 is provided between the first grip portion 103 and the second grip portion 203.

[0029] In some embodiments, the lower annular cutting edge 105 and the upper annular cutting edge 205 are both made of tungsten carbide, or high-speed steel.

[0030] In some embodiments, the handles of the aforementioned annular lower blade 105 and annular upper blade 205 are made of alloy steel, the same material as the scissor handle, and are wrapped with rubber on the outside.

[0031] In some embodiments, the thickness of the first cutting portion 101 and the second cutting portion 201 is 100~200mm.

[0032] In some embodiments, the first cutting portion 101 and the second cutting portion 201 are rectangular. Example 1

[0033] like Figure 1 As shown, this utility model discloses a sampling shear for titanium alloy strips and foils, used for sampling during the sample preparation process of titanium and titanium alloy foil products with a thickness of less than 0.1 mm.

[0034] The sampling shears include a first shear handle 1 and a second shear handle 2. The first shear handle 1 includes a first cutting part 101, a first grip part 103, and a first connecting part 102 connecting the first cutting part 101 and the first grip part 103. The first shear handle 1 and the second shear handle 2 are not on the same plane. The second shear handle 2 includes a second cutting part 201, a second grip part 203, and a second connecting part 202 connecting the second cutting part 201 and the second grip part 203. The first cutting part 101 is located directly below the second cutting part 201 and is parallel to it. The first grip part 103 is parallel to the second grip part 203.

[0035] The lower front surface of the second cutting section 201 is fixedly provided with an annular upper blade 205, and the front end of the second cutting section 201 is provided with a cutting through hole 206. The edge of the cutting through hole 206 is fixedly provided with an annular lower blade 105 corresponding to the annular upper blade 205. The annular lower blade 105 is located on the upper surface of the first cutting section 101.

[0036] The diameter of the lower annular blade 105 is d1, and the diameter of the upper annular blade 205 is d2. Δd = d1 - d2, and 0.01 ≤ Δd ≤ 0.02 mm, d1 = 20 mm. When the sampling shear is in the cutting state, the centers of the lower annular blade 105 and the upper annular blade 205 coincide, forming a layered shearing structure.

[0037] The minimum straight-line distance from the foremost end 1021 of the first connecting part 102 to the annular lower cutting edge 105 is L, and L = 200 mm.

[0038] The first connecting part 102 and the second connecting part 202 are parallel to each other and are hinged by the hub module 3; the hub module 3 is parallel to the main body 1011 of the first cutting part 101; the first connecting part 102 and the second connecting part 202 can rotate around the hub module 3.

[0039] The hub module 3 is a pin structure.

[0040] Both the lower annular cutting edge 105 and the upper annular cutting edge 205 are high-speed steel blades.

[0041] The handles of the lower annular blade 105 and the upper annular blade 205 are made of alloy steel, the same material as the scissor handle, and are wrapped in rubber on the outside.

[0042] The thickness of the first cutting part 101 and the second cutting part 201 is 100 mm.

[0043] The first cutting portion 101 and the second cutting portion 201 are rectangular.

[0044] The sampling shear in this embodiment 1 employs a coaxial circular blade design with a slight diameter difference between the upper and lower blades. When the blades are closed, the material forms a ring-shaped stress zone between the two blades, and the actual shearing force is achieved by the combined action of the upper and lower blades, thereby eliminating damage to the sample caused by localized stress concentration. Using the sampling shear is convenient and quick, and it can effectively obtain samples with neat, burr-free edges and a high surface finish. Example 2

[0045] like Figures 2 to 5 As shown, this utility model discloses a sampling shear for titanium alloy strips and foils, used for sampling during the sample preparation process of titanium and titanium alloy strip products with a thickness of less than 1.0 mm.

[0046] The sampling shears include a first shear handle 1 and a second shear handle 2. The first shear handle 1 includes a first cutting part 101, a first grip part 103, and a first connecting part 102 connecting the first cutting part 101 and the first grip part 103. The first shear handle 1 and the second shear handle 2 are not on the same plane. The second shear handle 2 includes a second cutting part 201, a second grip part 203, and a second connecting part 202 connecting the second cutting part 201 and the second grip part 203. The first cutting part 101 is located directly below the second cutting part 201 and is parallel to it. The first grip part 103 is parallel to the second grip part 203.

[0047] The lower front surface of the second cutting section 201 is fixedly provided with an annular upper blade 205, and the front end of the second cutting section 201 is provided with a cutting through hole 206. The edge of the cutting through hole 206 is fixedly provided with an annular lower blade 105 corresponding to the annular upper blade 205. The annular lower blade 105 is located on the upper surface of the first cutting section 101.

[0048] The diameter of the lower annular blade 105 is d1, and the diameter of the upper annular blade 205 is d2. Δd = d1 - d2, and 0.01 ≤ Δd ≤ 0.03 mm, d1 = 15 mm. When the sampling shear is in the cutting state, the centers of the lower annular blade 105 and the upper annular blade 205 coincide, forming a layered shearing structure.

[0049] The minimum straight-line distance from the foremost end 1021 of the first connecting part 102 to the annular lower cutting edge 105 is L, and L = 300 mm.

[0050] The first connecting part 102 is provided with a cylindrical through hole 104 perpendicular to the first cutting part 101, and the second connecting part 202 is a cylinder perpendicular to the second cutting part 201 and the second handle part 203; the second connecting part 202 passes through the fitting through hole 104 and can slide along the axial direction of the through hole 104.

[0051] A miniature electric cylinder 5 is provided between the first grip portion 103 and the second grip portion 203.

[0052] Both the lower annular cutting edge 105 and the upper annular cutting edge 205 are tungsten carbide or high-speed steel blades.

[0053] The handles of the lower annular blade 105 and the upper annular blade 205 are made of alloy steel, the same material as the scissor handle, and are wrapped in rubber on the outside.

[0054] The thickness of the first cutting portion 101 and the second cutting portion 201 is 200 mm. The first cutting portion 101 and the second cutting portion 201 are rectangular. Example 3

[0055] This utility model discloses a sampling shear for titanium alloy strips and foils, used for sampling during the sample preparation process of titanium and titanium alloy strip products with a thickness of less than 0.1 mm and less than 3.0 mm.

[0056] The sampling shears include a first shear handle 1 and a second shear handle 2. The first shear handle 1 includes a first cutting part 101, a first grip part 103, and a first connecting part 102 connecting the first cutting part 101 and the first grip part 103. The first shear handle 1 and the second shear handle 2 are not on the same plane. The second shear handle 2 includes a second cutting part 201, a second grip part 203, and a second connecting part 202 connecting the second cutting part 201 and the second grip part 203. The first cutting part 101 is located directly below the second cutting part 201 and is parallel to it. The first grip part 103 is parallel to the second grip part 203.

[0057] The lower front surface of the second cutting section 201 is fixedly provided with an annular upper blade 205, and the front end of the second cutting section 201 is provided with a cutting through hole 206. The edge of the cutting through hole 206 is fixedly provided with an annular lower blade 105 corresponding to the annular upper blade 205. The annular lower blade 105 is located on the upper surface of the first cutting section 101.

[0058] The diameter of the lower annular blade 105 is d1, and the diameter of the upper annular blade 205 is d2. Δd = d1 - d2, and 0.02 ≤ Δd ≤ 0.04 mm, d1 = 15 mm. When the sampling shear is in the cutting state, the centers of the lower annular blade 105 and the upper annular blade 205 coincide, forming a layered shearing structure.

[0059] The minimum straight-line distance from the foremost end 1021 of the first connecting part 102 to the annular lower cutting edge 105 is L, and L = 400 mm.

[0060] The first connecting part 102 and the second connecting part 202 are parallel to each other and are hinged by the hub module 3; the hub module 3 is parallel to the main body 1011 of the first cutting part 101; the first connecting part 102 and the second connecting part 202 can rotate around the hub module 3.

[0061] The pivot module 3 is a coaxial composite cam-bearing structure, which includes: an integral pivot sleeve, a cam, a cam sleeve, and a thrust bearing and a disc spring that provide axial preload; the thrust bearing and the disc spring are coaxially installed inside the pivot sleeve; the cam sleeve is coaxially installed outside the pivot sleeve, and the cam sleeve has an eccentricity e; a roller follower that contacts the outer circle of the cam is provided near the first grip portion 103; the cam sleeve can be finely adjusted relative to the pivot sleeve to set the cutting edge overlap and side clearance.

[0062] Both the lower annular cutting edge 105 and the upper annular cutting edge 205 are tungsten carbide inserts.

[0063] The handles of the lower annular blade 105 and the upper annular blade 205 are made of alloy steel, the same material as the scissor handle, and are wrapped in rubber on the outside.

[0064] The thickness of the first cutting part 101 and the second cutting part 201 is 200mm.

[0065] The first cutting portion 101 and the second cutting portion 201 are rectangular.

Claims

1. A sampling shear for titanium alloy strips and foils, characterized in that, The scissors include a first scissor handle (1) and a second scissor handle (2); the first scissor handle (1) includes a first cutting part (101), a first grip part (103), and a first connecting part (102) connecting the first cutting part (101) and the first grip part (103); the first scissor handle (1) and the second scissor handle (2) are not on the same plane; the second scissor handle (2) includes a second cutting part (201), a second grip part (203), and a second connecting part (202) connecting the second cutting part (201) and the second grip part (203); the first cutting part (101) is located directly below the second cutting part (201) and is parallel to it, and the first grip part (103) is parallel to the second grip part (203); The lower front surface of the second cutting part (201) is fixedly provided with an annular upper blade (205), and the front end of the second cutting part (201) is provided with a cutting through hole (206). The edge of the cutting through hole (206) is fixedly provided with an annular lower blade (105) corresponding to the annular upper blade (205). The annular lower blade (105) is located on the upper surface of the first cutting part (101). The diameter of the lower annular blade (105) is d1, and the diameter of the upper annular blade (205) is d2, Δd = d1 - d2, and 0.01mm ≤ Δd ≤ 0.05mm, d1 ≤ 20mm; when the sampling shear is in the cutting state, the centers of the lower annular blade (105) and the upper annular blade (205) coincide, forming a layered shearing structure.

2. The sampling shear for titanium alloy strips and foils according to claim 1, characterized in that, The minimum straight-line distance from the foremost end (1021) of the first connecting part (102) to the annular lower cutting edge (105) is L, and L≤400mm.

3. The sampling shear for titanium alloy strips and foils according to claim 2, characterized in that, The first connecting part (102) and the second connecting part (202) are parallel to each other and are hinged by the hub module (3); the hub module (3) is parallel to the main body (1011) of the first cutting part (101); the first connecting part (102) and the second connecting part (202) can rotate around the hub module (3).

4. The sampling shear for titanium alloy strips and foils according to claim 3, characterized in that, The pivot module (3) is a coaxial composite cam-bearing structure, which includes: an integral pivot sleeve, a cam, a cam sleeve, and a thrust bearing and a disc spring that provide axial preload; the thrust bearing and the disc spring are coaxially installed inside the pivot sleeve; the cam sleeve is coaxially installed outside the pivot sleeve, and the cam sleeve has an eccentricity e; a roller follower that contacts the outer circle of the cam is provided near the first grip portion (103); the cam sleeve can be finely adjusted relative to the pivot sleeve to set the edge overlap and side clearance.

5. The sampling shear for titanium alloy strips and foils according to claim 3, characterized in that, The hub module (3) is a pin structure.

6. The sampling shear for titanium alloy strips and foils according to claim 2, characterized in that, The first connecting part (102) is provided with a cylindrical through hole (104) perpendicular to the first cutting part (101), and the second connecting part (202) is a cylinder perpendicular to the second cutting part (201) and the second handle part (203); the second connecting part (202) is adapted to the through hole (104) and can slide along the axial direction of the through hole (104).

7. The sampling shear for titanium alloy strips and foils according to claim 6, characterized in that, A miniature electric cylinder (5) is provided between the first grip portion (103) and the second grip portion (203).

8. The sampling shear for titanium alloy strips and foils according to any one of claims 1 to 7, characterized in that, The lower annular cutting edge (105) and the upper annular cutting edge (205) are both made of tungsten steel (105) and tungsten steel (205), or of high-speed steel (105) and high-speed steel (205).

9. The sampling shear for titanium alloy strips and foils according to claim 1, characterized in that, The thickness of the first cutting part (101) and the second cutting part (201) is 100~200mm.

10. The sampling shear for titanium alloy strips and foils according to claim 1, characterized in that, The first cutting portion (101) and the second cutting portion (201) are rectangular.

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