CN219455639U - Shearing device - Google Patents

Abstract

The utility model belongs to the technical field of metallographic specimen processing, and discloses a shearing device. The shearing device comprises a pressing plate, a first shearing piece and a second shearing piece which are pivoted, wherein a shearing knife is arranged at the first end of the first shearing piece towards the second shearing piece, a bearing plate is arranged at the first end of the second shearing piece, the bearing plate is used for placing a piece to be sheared, a cutting edge is arranged on the bearing plate, the cutting edge is correspondingly arranged with shearing, and the second end of the first shearing piece and the second end of the second shearing piece are positioned at the same side of the pivoting position of the first shearing piece and the second shearing piece; the pressing plate is correspondingly arranged with the bearing plate, the corresponding shearing knife is provided with an avoidance gap, the pressing plate is in floating connection with the shearing knife, and the second end of the first shearing piece and the second end of the second shearing piece can be mutually close to each other, so that the pressing plate presses the bearing plate and the shearing blade enters the cutting edge. The shearing device can simultaneously compress two sides of the sample when the shearing device is used for shearing the thin sheet, so that the sample is prevented from bending deformation.

Description

Shearing device

Technical Field

The utility model relates to the technical field of metallographic specimen processing, in particular to a shearing device.

Background

The preparation of the metallographic specimen is generally to place the specimen to be detected in a cavity of an embedding machine, then add resin, heat and melt the resin through equipment, cool and solidify the specimen to be detected in the resin, and prepare the metallographic specimen for observation in a microscope through multiple grinding and polishing. The diameter of the internal cavity of the conventional metallographic mosaic machine is about 30mm, so that a sample to be detected needs to be processed before being mosaic, and the size of the sample is controlled in the diameter of the cavity of the mosaic machine, so that the sample to be detected can be placed in the cavity of the mosaic machine. For larger-sized specimens, conventional specimen processing methods are numerous, such as abrasive cutting, wire-cut electric discharge machining, flame machining, hand sawing, and shearing.

For sample processing of a thin plate, different processing methods have advantages and disadvantages, such as grinding wheel cutting, electric spark cutting needs to rely on special equipment, equipment investment is large, and a large amount of heat is generated in the sample processing process, so that a thermal processing influence layer is formed on the surface of the sample. The hand saw and the shearing are the most convenient and practical method for processing the sample of the thin plate, however, a thermal processing influence layer can be formed on the surface of the sample due to cutting heating in the hand saw processing process, and meanwhile, the surface of the hand saw sample is uneven, so that metallographic sample preparation is influenced.

Shearing has many advantages for sample processing of the sheet, such as no high equipment cost, avoidance of heat affected layers, and convenient operation. However, in general shearing tools (e.g., industrial shears), when shearing a thin plate, the sample is easily bent and deformed after shearing due to the thin thickness of the sample.

Therefore, there is a need to design a shearing device to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a shearing device which can simultaneously press a sample and prevent the sample from bending deformation when the sample is sheared by using scissors.

To achieve the purpose, the utility model adopts the following technical scheme:

a shearing device comprising:

the first end of the first shearing piece is provided with a shearing knife towards the second shearing piece, the first end of the second shearing piece is provided with a bearing plate, the bearing plate is used for placing a piece to be sheared, the bearing plate is provided with a cutting edge, the cutting edge is arranged corresponding to the shearing knife, and the second end of the first shearing piece and the second end of the second shearing piece are positioned on the same side of the pin joint position of the first shearing piece and the second shearing piece; and

and the pressing plate is correspondingly arranged with the bearing plate, an avoidance gap is formed at the position of the pressing plate corresponding to the shearing knife, the pressing plate is in floating connection with the shearing knife, and the second end of the first shearing piece and the second end of the second shearing piece can be mutually close to each other so that the pressing plate presses the bearing plate and the shearing knife edge enters the cutting edge.

Optionally, the shearing knife is provided with a connecting rod, the connecting rod and the shearing knife are arranged at an included angle, the pressing plate is in threaded connection with a screw, the shearing device further comprises a floating assembly, and the floating assembly comprises:

the bushing comprises a limiting part and an annular bushing body, one end of the annular bushing body is connected with the connecting rod, the outer edge of the other end of the bushing body protrudes inwards to form the limiting part, a nut of the screw can be limited by the limiting part and can slide along the bushing body, and the screw rod of the screw penetrates through the limiting part; and

and the elastic piece is sleeved outside the screw, one end of the elastic piece is abutted against the bearing plate, and the other end is abutted against the limiting part or the connecting rod.

Optionally, a first sinking groove is formed on the pressing plate, the screw and the pressing plate are in threaded connection with the first sinking groove, and one end of the elastic piece is abutted to the bottom of the first sinking groove and limited by the vertical wall of the first sinking groove.

Optionally, the connecting rod includes a connecting rod body and a protrusion, a second sinking groove with an opening facing the pressing plate is formed in the connecting rod body, the protrusion is convexly formed at a bottom of the second sinking groove, an outer circumferential surface of the protrusion is in threaded connection with an inner circumferential surface of the bushing body, a part of the elastic piece is sleeved on the outer circumferential surface of the bushing body, and one end of the elastic piece abuts against the bottom of the second sinking groove and is limited by a side wall of the second sinking groove.

Optionally, at least two protrusions are correspondingly disposed on each connecting rod body, and the floating assemblies are disposed in one-to-one correspondence with the protrusions.

Optionally, a second sinking groove with an opening facing the pressing plate is formed on the connecting rod, the outer circumferential surface of the bushing body is in threaded connection with the connecting rod at the second sinking groove, part of the elastic piece is sleeved on the outer circumference of the bushing body, and one end of the elastic piece is abutted to the bottom of the second sinking groove and limited by the side wall of the second sinking groove.

Optionally, the two sides of the shearing knife are respectively provided with the connecting rods, and a floating assembly is arranged between each connecting rod and the bearing plate.

Optionally, at least two of the links are provided on each side of the shear blade along its length.

Optionally, the cross section of the shearing knife is inverted triangle.

Optionally, at least part of the cutting edge of the shearing blade is located in the relief gap.

The utility model has the beneficial effects that:

the utility model provides a shearing device, which is characterized in that a pressing plate is connected with a shearing blade in a floating mode, when the shearing device is used for shearing a sample, the sample is firstly placed on a bearing plate, then the second end of a first shearing piece and the second end of a second shearing piece can be mutually close, the pressing plate gradually approaches to the bearing plate and then presses the bearing plate, so that the sample between the pressing plate and the bearing plate is flattened, as the second end of the first shearing piece and the second end of the second shearing piece are continuously close to each other, the pressing plate is stressed, the bearing plate is continuously pressed, and a shearing blade is inserted into a cutting edge to complete the cutting of the sample, and the shearing device ensures the shearing flatness of the sample on the premise of avoiding a thermal processing influence layer formed on the surface of the sample, and is simple to operate by hands.

Drawings

FIG. 1 is a schematic view of a shearing device according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a shearing device according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view at A-A in FIG. 2;

FIG. 4 is an exploded view of a part of a shear device according to an embodiment of the present utility model;

fig. 5 is an exploded view of a part of a shearing device according to an embodiment of the present utility model.

In the figure:

10. a first shear member; 11. a shearing knife; 111. a connecting rod; 1111. a connecting rod body; 11111. a second sink; 1112. a convex portion; 112. a knife back; 113. a blade; 12. a first pivot rod; 13. a first hand-held portion;

20. a second shear member; 21. a carrying plate; 211. a cutting edge; 22. a second pivot rod; 23. a second hand-held portion;

30. a pressing plate; 31. a first platen; 32. a second pressing plate; 33. a screw; 331. a screw cap; 332. a stud; 34. a first sink;

40. a floating assembly; 41. a bushing; 411. a bushing body; 412. a limit part; 42. an elastic member.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

The present embodiment provides a shearing device capable of simultaneously pressing a sample and preventing bending deformation of the sample when shearing the sample using scissors. As shown in fig. 1, the shearing device includes a pressing plate 30, and a first shearing member 10 and a second shearing member 20 that are pivoted, wherein a first end of the first shearing member 10 is provided with a shearing blade 11 towards the second shearing member 20, a first end of the second shearing member 20 is provided with a bearing plate 21, the bearing plate 21 is used for placing a member to be sheared, a cutting edge 211 is provided on the bearing plate 21, the cutting edge 211 is correspondingly provided with the shearing edge, and a second end of the first shearing member 10 and a second end of the second shearing member 20 are located on the same side of the pivoting position of the first shearing member 10 and the second shearing member 20; the pressing plate 30 is correspondingly arranged with the bearing plate 21, an avoidance gap (which is coincident with the shearing knife 11 in fig. 1 and is not marked) is formed at the position corresponding to the shearing knife 11, the pressing plate 30 is in floating connection with the shearing knife 11, and the second end of the first shearing piece 10 and the second end of the second shearing piece 20 can be mutually close to each other, so that the pressing plate 30 presses the bearing plate 21 and the shearing knife 11 is in edge 211. Through connecting clamp plate 30 at shearing sword 11 float, when using this shearing mechanism to cut the sample, firstly put into loading board 21 with the sample, afterwards can be close to each other with the second end of first shearing member 10 and the second end of second shearing member 20, clamp plate 30 pushes down loading board 21 after gradually being close to loading board 21 for the sample that is located between clamp plate 30 and the loading board 21 is flattened, because shearing sword 11 floats and connects clamp plate 30, along with the second end of first shearing member 10 and the second end of second shearing member 20 continue to be close to, clamp plate 30 atress continues to compress tightly loading board 21 the while shearing sword 11 sword income blade 211 accomplish the cutting to the sample, this shearing mechanism has guaranteed the planarization of sample shearing under the prerequisite that avoids sample surface to form the thermal processing influence layer, and staff easy operation.

Preferably, as shown in fig. 1, the cross section of the shearing blade 11 is in an inverted triangle shape, and the above arrangement improves the overall strength of the shearing blade 11 and ensures the shearing effect on the sample. Specifically, the shear blade 11 includes a back 112 and a blade 113 connected up and down, the blade 113 has a certain height, the width of the back 112 is larger than the width of the blade 113 and the width of the back 112 is gradually reduced from top to bottom. The blade 113 faces the avoidance gap, so that the shearing blade 11 cuts the sample after being inserted into the blade 211 through the avoidance gap.

Optionally, as shown in fig. 1, the first shearing member 10 further includes a first pivoting rod 12 and a first handheld portion 13, two ends of the first pivoting rod 12 are respectively connected to the back 112 and the first handheld portion 13, the second shearing member 20 further includes a second pivoting rod 22 and a second handheld portion 23, two ends of the second pivoting rod 22 are respectively connected to the bearing plate 21 and the second handheld portion 23, and the first pivoting rod 12 and the second pivoting rod 22 are pivoted at the middle parts of the two.

Preferably, the first hand holding part 13 and the second hand holding part 23 are provided with hand holding rings, so that the force is applied after the hand is inserted.

Preferably, as shown in fig. 1, at least part of the blade 113 is located in the relief gap, and by the above arrangement, it is guided at the start of the depression of the shear blade 11, preventing the blade 113 from colliding with the side wall of the relief gap.

Preferably, as shown in fig. 1 and 2, the shearing blade 11 is provided with a connecting rod 111, specifically, the connecting rod 111 is installed on the side surface of the back of the blade 112, the connecting rod 111 forms an included angle with the blade surface of the shearing blade 11, the pressing plate 30 is in threaded connection with a screw 33, the screw 33 is in floating connection with the connecting rod 111, and by means of the arrangement, the connecting rod 111 and the screw 33 provide better floating positions for floating connection of the shearing blade 11 and the pressing plate 30 respectively.

Further, the shearing device further comprises a floating assembly 40, and the connecting rod 111 and the screw 33 are in floating connection through the floating assembly 40. Specifically, as shown in fig. 2 to 5, the floating assembly 40 includes a bushing 41 and an elastic member 42, the bushing 41 includes a limiting portion 412 and an annular bushing body 411, one end of the annular bushing body 411 is connected with the connecting rod 111, the outer edge of the other end of the bushing body 411 protrudes inward to form the limiting portion 412, a nut 331 of the screw 33 can be limited by the limiting portion 412 and can slide along the bushing body 411, and a screw rod of the screw 33 penetrates through the limiting portion 412; through the above arrangement, when the first hand-held portion 13 and the second hand-held portion 23 approach each other to drive the shearing blade 11 and the connecting rod 111 to approach the bearing plate 21 at the same time, after the pressing plate 30 presses the bearing plate 21, the bushing 41 continues to move downward, the screw 33 slides in the bushing 41, the elastic member 42 starts to compress, and a certain counterforce is applied to the pressing plate 30, so that the pressing plate 30 compresses the bearing plate 21, and the cutting edge 113 continues to press downward to complete shearing.

Preferably, as shown in fig. 3 to 5, the pressing plate 30 is provided with a first countersink 34, the screw 33 and the pressing plate 30 are connected to the first countersink 34 in a threaded manner, and one end of the elastic member 42 abuts against the bottom of the first countersink 34 and is limited by the vertical wall of the first countersink 34. Through the above arrangement, the elastic member 42 is limited in the circumferential direction abutting against one end of the bearing plate 21, so that the elastic member 42 is not easy to displace at the end, and the floating stability is ensured.

In this embodiment, as shown in fig. 3 to 5, the connecting rod 111 includes a connecting rod body 1111 and a protrusion, the connecting rod body 1111 is provided with a second sinking groove 11111 with an opening facing the pressing plate 30, the bottom of the second sinking groove 11111 is provided with a protrusion, the outer circumferential surface of the protrusion is in threaded connection with the inner circumferential surface of the bushing body 411, a part of the elastic member 42 is sleeved on the outer circumference of the bushing body 411, and one end of the elastic member 42 abuts against the bottom of the second sinking groove 11111 and is limited by the side wall of the second sinking groove 11111. Through the arrangement, when the elastic piece 42 is abutted to the connecting rod body 1111, the second sinking groove 11111 provides a flat abutting plane for the end part of the elastic piece 42, and the side wall of the second sinking groove 11111 can limit the other end of the elastic piece 42, so that the elastic piece 42 is not easy to displace at the other end, and both ends of the elastic piece 42 are limited based on the common arrangement of the first sinking groove 34 and the second sinking groove 11111, so that the floating stability is better ensured.

In other embodiments, the elastic member 42 with a smaller diameter may be selected, so that the elastic member 42 is only enclosed outside the stud 332, and two ends of the elastic member abut against the carrier 21 and the limiting portion 412 respectively, and the floating effect may also be achieved, which is not limited herein.

Preferably, at least two protrusions 1112 are correspondingly arranged on each connecting rod body 1111, and the floating assemblies 40 are correspondingly arranged on the protrusions 1112 one by one. The stress uniformity of each link 111 is improved.

Preferably, the shearing blade 11 is provided with a connecting rod 111 on both sides. By the above arrangement, the balance of the stress of the pressing plates 30 on both sides of the shear blade 11 is improved. Specifically, as shown in fig. 1, the pressing plate 30 includes a first pressing plate 31 and a second pressing plate 32, and the first pressing plate 31 and the second pressing plate 32 are respectively located at both sides of the shear blade 11 with an avoiding gap formed therebetween. In this embodiment, the first pressing plate 31 and the second pressing plate 32 are of a split structure, and in other embodiments, they may be integrated after being connected to the front end of the shearing blade 11, so that the front end of the shearing blade 11 may be protected, which is not limited herein.

Preferably, at least two links 111 are provided on each side of the shear blade 11 in the length direction thereof. Further, the stress balance in the length direction of the shearing blade 11 is improved, in this embodiment, two connecting rods 111 are disposed on two sides of the shearing blade 11, and in other embodiments, more connecting rods may be disposed according to the requirement and the installation space, which is not limited herein.

Example two

The difference between the first embodiment and the second embodiment is that the connecting rod is provided with a second sinking groove with an opening facing the pressing plate, the outer circumferential surface of the bushing body is in threaded connection with the connecting rod at the second sinking groove, a part of the elastic piece is sleeved on the outer circumference of the bushing body, and one end of the elastic piece is abutted to the bottom of the second sinking groove and limited by the side wall of the second sinking groove. That is, the screw thread of the bushing body of the present embodiment is formed on the outer periphery, while the screw thread of the bushing body of the first embodiment is formed on the inner ring, both the two ways can realize the screw connection with the connecting rod, in the present embodiment, the setting of the protrusion 1112 is omitted, and the processing is more convenient.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Shearing mechanism, its characterized in that includes:

the cutting device comprises a first cutting piece (10) and a second cutting piece (20) which are pivoted, wherein a first end of the first cutting piece (10) faces to the second cutting piece (20) and is provided with a cutting knife (11), a bearing plate (21) is arranged at the first end of the second cutting piece (20), the bearing plate (21) is used for placing a piece to be cut, a cutting edge (211) is formed in the bearing plate (21), the cutting edge (211) is arranged corresponding to the cutting knife (11), and a second end of the first cutting piece (10) and a second end of the second cutting piece (20) are located on the same side of the pivoted positions of the first cutting piece (10) and the second cutting piece (20); and

the clamp plate (30) with loading board (21) corresponds the setting, clamp plate (30) corresponds shearing sword (11) department is seted up and is dodged the clearance, clamp plate (30) with shearing sword (11) floating connection, the second end of first shearing piece (10) with the second end of second shearing piece (20) can be close to each other, so that clamp plate (30) compress tightly loading board (21) just shearing sword (11) sword is gone into blade (211).

2. The shearing apparatus as recited in claim 1, characterized in that the shearing blade (11) is provided with a connecting rod (111), the connecting rod (111) is disposed at an angle with the blade surface of the shearing blade (11), the pressing plate (30) is screwed with a screw (33), the shearing apparatus further comprises a floating assembly (40), and the floating assembly (40) comprises:

the bushing (41) comprises a limiting part (412) and an annular bushing body (411), one end of the annular bushing body (411) is connected with the connecting rod (111), the outer edge of the other end of the bushing body (411) protrudes inwards to form the limiting part (412), a nut (331) of the screw (33) can be limited by the limiting part (412) and can slide along the bushing body (411), and a screw rod of the screw (33) penetrates through the limiting part (412); and

and the elastic piece (42) is sleeved outside the screw (33), one end of the elastic piece (42) is abutted against the bearing plate (21), and the other end is abutted against the limiting part (412) or the connecting rod (111).

3. The shearing device according to claim 2, wherein the pressing plate (30) is provided with a first sinking groove (34), the screw (33) and the pressing plate (30) are in threaded connection with the first sinking groove (34), and one end of the elastic piece (42) is abutted to the groove bottom of the first sinking groove (34) and limited by the vertical wall of the first sinking groove (34).

4. A shearing device according to claim 3, wherein the connecting rod (111) comprises a connecting rod body (1111) and a convex part (1112), a second sinking groove (11111) with an opening facing the pressing plate (30) is formed in the connecting rod body (1111), the convex part (1112) is convexly arranged at the bottom of the second sinking groove (11111), the outer circumferential surface of the convex part (1112) is in threaded connection with the inner circumferential surface of the bushing body (411), a part of the elastic part (42) is sleeved on the outer circumferential surface of the bushing body (411), and one end of the elastic part (42) is abutted to the bottom of the second sinking groove (11111) and limited by the side wall of the second sinking groove (11111).

5. The shearing apparatus as recited in claim 4, wherein at least two protrusions (1112) are disposed on each link body (1111) in a one-to-one correspondence, and the floating assemblies (40) are disposed in a one-to-one correspondence with the protrusions (1112).

6. A shearing device according to claim 3, wherein the connecting rod (111) is provided with a second sinking groove (11111) with an opening facing the pressing plate (30), the outer circumferential surface of the bushing body (411) and the connecting rod (111) are in threaded connection with the second sinking groove (11111), part of the elastic piece (42) is sleeved on the outer circumference of the bushing body (411), and one end of the elastic piece (42) is abutted to the bottom of the second sinking groove (11111) and limited by the side wall of the second sinking groove (11111).

7. A shearing apparatus as claimed in claim 2, wherein the shearing blade (11) is provided with said links (111) on both sides, and a float assembly (40) is provided between each of said links (111) and said carrier plate (21).

8. A shearing apparatus as claimed in claim 7, characterised in that at least two said links (111) are provided on each side of the shearing blade (11) along its length.

9. A shearing apparatus as claimed in any one of claims 1 to 8, characterised in that the shearing blade (11) has an inverted triangular cross section.

10. A shearing apparatus as claimed in any one of claims 1 to 8, characterized in that at least part of the cutting edge (113) of the shearing blade (11) is located in the relief gap.