Wire cutting device

Abstract

The utility model discloses a wire cutting device belongs to cutting equipment technical field. Through setting cutting knife group and bevel cutting knife group respectively at the both ends of wire positioning groove, and using the cutting order of cutting knife group and bevel cutting knife group in proper order, realized the thinning processing to wire end part, and formed welding transition section. The welding transition section is the folded surface structure, can make the wire end part have the gentle thickness progression, and because axial section and radial bevel surface are all plane, can make the welding transition section and balloon etc. parent material form gentle, continuous transition link, improve the transition effect when wire end part welding, and the smooth section can increase the contact area of wire end part and parent material, help to improve the welding quality, and because the wire end part is closer to the position thickness of endpoint thinner, avoided the wire end part because of not transition and formed the protrusion, and possibly scratch the inner wall of blood vessel etc. problem, has the key role to the promotion balloon etc. medical instrument's use safety and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of cutting equipment technology, and relates to the cutting and processing of raw materials for medical devices, particularly a wire cutting device. Background Technology

[0002] When welding polymer filaments such as nylon, PP, PE, and PVC to components like balloons, there is often a lack of transition at the filament ends. This lack of transition at the filament ends typically refers to the absence of a continuous, smooth connection between the filament end and the base material or molten pool during the welding process.

[0003] Untransitioned filament ends often have sharp edges, which become stress concentration points when the balloon inflates or contracts. Long-term repeated stress may lead to fatigue fracture and shorten the product's lifespan. Moreover, the rough surface of untransitioned filament ends can pose risks. For example, in vascular intervention balloons, the roughness or protrusions at the filament ends may scratch the inner wall of the blood vessel or cause complications such as thrombosis and inflammation, seriously affecting the safety of product use.

[0004] Therefore, it is necessary to improve the transition effect at the wire ends and reduce welding defects in order to meet the high reliability and high safety technical requirements of medical devices. Utility Model Content

[0005] The purpose of this invention is to provide a wire cutting device that can improve the transition effect during wire end welding by thinning the wire end, thereby solving the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This utility model provides a wire cutting device, comprising:

[0008] The base has a wire positioning groove for placing wire, and the groove opening allows the part of the wire to be cut to protrude.

[0009] The cutting tool assembly, located at the first end of the wire positioning groove, is capable of cutting the part to be cut along the length direction of the wire by a preset length.

[0010] The oblique cutting blade assembly, located at the second end of the wire positioning groove, can obliquely cut the portion cut by the cutting blade assembly, so that the end of the wire forms a welding transition surface.

[0011] In some embodiments, the upper surface of the base is further provided with a positioning boss, and the upper surface of the positioning boss is provided with a plurality of parallel wire positioning grooves at intervals.

[0012] In some embodiments, the cutting tool assembly includes:

[0013] The cutting tool holder slides in contact with the upper surface of the base;

[0014] A cutting blade is disposed at the end of the cutting tool holder near the second end. The cutting edge of the cutting blade is slidably guided with the upper surface of the positioning boss so that the part to be cut can be cut to a preset length along the length direction of the wire under the sliding action of the cutting tool holder.

[0015] In some embodiments, the upper surface of the cutting tool holder is configured as a first inclined surface, the first inclined surface is inclined downward along the direction from the first end to the second end, and the included angle α between the first inclined surface and the upper surface of the base is 0° to 80°, the cutting blade is disposed at the lower end of the first inclined surface and is parallel to the first inclined surface.

[0016] In some embodiments, the cutting tool holder is a U-shaped tool holder with its opening facing the oblique cutting tool assembly. The U-shaped tool holder is inserted into the positioning boss so that the two sides of the inner wall of the U-shaped tool holder slide and guide with the two sides of the positioning boss respectively.

[0017] In some embodiments, the beveling blade assembly includes:

[0018] A guide boss is provided on the upper surface of the base. The upper surface of the guide boss is provided with a second inclined surface. The second inclined surface is inclined downward along the direction from the second end to the first end, and the included angle β between the second inclined surface and the upper surface of the base is 0° to 90°.

[0019] The bevel cutting blade is parallel to the second bevel and is slidably mounted on the second bevel.

[0020] In some embodiments, the guide boss includes a first guide boss and a second guide boss symmetrically arranged on both sides of the positioning boss.

[0021] The upper surfaces of the first guide boss and the second guide boss are both provided with the second inclined surface, and the second inclined surface of the first guide boss and the second guide boss are both provided with blade grooves parallel to the second inclined surface. The oblique cutting blade spans between the first guide boss and the second guide boss, and the two ends of the oblique cutting blade are slidably connected to the blade grooves on the first guide boss and the second guide boss, respectively.

[0022] Each of the blade grooves is provided with a blade limiting structure at its lower end to prevent the oblique cutting blade from coming out of the lower end of the blade groove.

[0023] In some embodiments, a third guide boss is integrally extended from the lower end of both the first guide boss and the second guide boss. The two third guide bosses are located on both sides of the positioning boss, and the upper surface of the third guide boss and the upper surface of the positioning boss are in the same plane.

[0024] The positioning boss has a fourth guide boss integrally extended from the end facing the second end. The fourth guide boss is located between the first guide boss and the second guide boss, and the guide surface of the fourth guide boss and any one of the second inclined surfaces are located in the same plane.

[0025] In some embodiments, the wire positioning groove is a dovetail groove, and the angle θ between the sidewall and the bottom of the dovetail groove is 25° to 90°.

[0026] In some embodiments, the upper surface of the positioning boss is further provided with a scale line indicating the cutting length, the scale line being located on the side of the wire positioning groove and arranged near the second end of the wire positioning groove.

[0027] The present invention achieves the following technical advantages over the prior art:

[0028] The wire cutting device proposed in this utility model has a reasonable structural design. By setting a cutting blade group and a bevel cutting blade group at both ends of the wire positioning groove, and utilizing the sequential cutting order of the cutting blade group and the bevel cutting blade group, the wire end is thinned and a welding transition surface is formed. The welding transition surface is a folded structure, which includes an axial section cut by the cutting blade group and a radial bevel cut formed by the bevel cutting blade group. The axial section and the radial bevel cut are connected at an obtuse angle, which allows the wire end to have a smooth thickness progression. Since both the axial section and the radial bevel cut are planes, the welding transition surface can form a smooth and continuous transition connection with the parent material such as a balloon, improving the transition effect when welding the wire end. The flat surface can increase the contact area between the wire end and the parent material, which helps to improve the welding quality. At the same time, since the thickness of the wire end is thinner closer to the end, it avoids the formation of bulges at the wire end due to lack of transition, which may scratch the inner wall of blood vessels. This plays a key role in improving the safety and reliability of medical devices such as balloons. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the base disclosed in an embodiment of the present utility model;

[0031] Figure 2 This is a schematic diagram of the cutting tool holder disclosed in an embodiment of the present utility model;

[0032] Figure 3 This is a schematic diagram of the positioning boss disclosed in an embodiment of the present utility model;

[0033] Figure 4 This is a schematic diagram of the overall assembly of the wire cutting device disclosed in an embodiment of the present utility model;

[0034] Figure 5 This is an assembly diagram of the cutting tool holder and each guide boss disclosed in an embodiment of the present utility model;

[0035] Figure 6 This is a schematic diagram of the welding transition section formed by cutting according to the present invention.

[0036] In the figure, the attached reference numeral is: 100 - wire cutting device;

[0037] 1-Base;

[0038] 2-Cutting tool set; 21-Cutting tool holder; 211-First inclined surface; 212-Insert mounting hole; 22-Cutting insert;

[0039] 3-Bevel cutting blade assembly; 31-Second bevel; 32-First guide boss; 33-Second guide boss; 34-Blade groove; 35-Bevel cutting blade;

[0040] 4-Positioning boss; 41-Wire positioning groove; 411-Groove sidewall; 412-Groove bottom; 413-Groove opening; 42-Scale line;

[0041] 5-Third guide boss;

[0042] 6-Fourth guide boss;

[0043] 7- Tool holder slide;

[0044] 8 - Wire end; 81 - Welding transition section; 811 - Axial section; 812 - Radial oblique section. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] The purpose of this invention is to provide a wire cutting device that can improve the transition effect during wire end welding by thinning the wire end, thereby solving the problems existing in the prior art.

[0047] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] like Figures 1-5 As shown, this embodiment provides a wire cutting device 100, which mainly includes three parts: a base 1, a cutting blade assembly 2, and a beveling blade assembly 3. The base 1 is provided with a wire positioning groove 41, which is used to hold wire. Generally, each wire positioning groove 41 can only accommodate a single wire at a time, providing bottom support and peripheral positioning for the wire. The groove opening 413 of the wire positioning groove 41, the wire positioning groove 41, and the length direction of the wire are parallel. After the end 8 of the wire to be cut is inserted into the wire positioning groove 41, the groove opening 413 of the wire positioning groove 41 allows the part to be cut at the end 8 of the wire to protrude, and this part to be cut extends along the length direction of the end 8 of the wire. The cutting blade assembly 2 is located at the first end of the wire positioning groove 41 (see reference). Figure 1 (As shown at the left end), it can cut a preset length along the length direction of the wire from the end of the part to be cut. The bevel cutting tool group 3 is located at the second end of the wire positioning groove 41 (see reference). Figure 1 As shown on the right end), the oblique cutting tool group 3 is arranged opposite to the cutting tool group 2. It can obliquely cut off the part cut by the cutting tool group 2 at the cutting end position of the cutting tool group 2, so that the wire end 8 can complete the material thinning and form a welding transition surface 81.

[0049] like Figure 6As shown, the welding transition surface 81 is a folded structure, which includes an axial surface 811 cut by the cutting tool group 2 and a radial oblique surface 812 connected to the axial surface 811 at an obtuse angle. The radial oblique surface 812 is formed by oblique cutting by the oblique cutting tool group 3. The bevel angle of the bevel cutting blade assembly 3 determines the size of the obtuse angle between the axial cut surface 811 and the radial bevel cut surface 812. The obtuse angle connection between the axial cut surface 811 and the radial bevel cut surface 812 allows for a smooth thickness progression at the end of the wire 8. Since both the axial cut surface 811 and the radial bevel cut surface 812 are planar, the welding transition cut surface 81 can form a smooth and continuous transition with the base material such as the balloon. The flat cut surface increases the contact area between the end of the wire 8 and the base material, contributing to improved welding quality. Simultaneously, because the thickness of the end of the wire 8 decreases towards the endpoint, it avoids the formation of protrusions at the end of the wire 8 due to lack of transition, which could potentially scratch the inner wall of blood vessels. This plays a crucial role in improving the safety and reliability of medical devices such as balloons. The axial cut surface 811 is usually a plane parallel to the central axis of the wire; however, in some specific embodiments, it can also be arranged at an acute angle to the central axis of the wire.

[0050] It should be noted that the wire end 8 refers to a section of wire located at the end of the wire, and not just the very end of the wire. The wire end 8 is generally inserted into the wire positioning groove 41 by passing it through the end of the wire positioning groove 41. The specific cutting length of the part to be cut on the wire end 8 can be flexibly adjusted according to actual needs. Figure 6 The structure shown is for illustrative purposes only and does not represent the actual cutting dimensions.

[0051] Some feasible specific implementation methods, such as Figure 1 and Figure 4 As shown, the upper surface of the base 1 is also provided with a positioning boss 4. The upper surface of the positioning boss 4 has multiple parallel wire positioning grooves 41, so the wire ends 8 of multiple wires can be cut at the same time, which can improve the processing efficiency.

[0052] Some feasible specific implementation methods, such as Figure 4 and Figure 5 As shown, the cutting tool assembly 2 specifically includes a cutting tool holder 21 and a cutting insert 22; the cutting tool holder 21 is in sliding contact with the upper surface of the base 1; the cutting insert 22 is disposed at the end of the cutting tool holder 21 near the second end and is higher than the positioning boss 4, and the cutting edge of the cutting insert 22 is in sliding guide engagement with the upper surface of the positioning boss 4. In use, pressing the cutting tool holder 21 causes the bottom plane of the cutting tool holder 21 to fit against the upper surface of the base 1, and pushes the cutting tool holder 21 to slide along the upper surface of the base 1 (according to...). Figure 4(Sliding in the cutting direction shown), during this sliding process, the cutting blade 22 cuts a preset length along the length direction of the wire at the end 8 of the wire exposed above the groove 413. For example... Figure 4 As shown, during the cutting process along this length direction, the cutting blade 22 cuts obliquely into the end of the wire 8. The cutting edge of the cutting blade 22 contacts the upper surface of the positioning boss 4. The positioning boss 4 can guide the cutting blade 22. At the same time, the positioning boss 4 can limit the cutting depth of the cutting blade 22 into the end of the wire 8 (radial along the end of the wire 8), ensuring the flatness of the aforementioned axial section 811 and improving the cutting quality.

[0053] Some feasible specific implementation methods, such as Figure 1 , Figure 4 and Figure 5 As shown, the upper surface of the cutting tool holder 21 is configured as a first inclined surface 211, and the first inclined surface 211 extends from the first end to the second end (i.e., Figure 4 The cutting direction shown is downward inclined, and the angle α between the first inclined surface 211 and the upper surface of the base 1 is 0° to 80°, preferably 30° to 75°. The cutting insert 22 is disposed at the lower end of the first inclined surface 211 and close to the lower end, and is parallel to the first inclined surface 211. A plurality of insert mounting holes 212 are provided near the lower end of the first inclined surface 211, and the cutting insert 22 is fixed to the insert mounting holes 212 by screws or studs.

[0054] Some feasible specific implementation methods, such as Figure 2 and Figure 5 As shown, the cutting tool holder 21 is preferably a U-shaped tool holder with its opening facing the oblique cutting tool assembly 3. The U-shaped tool holder is inserted into the positioning boss 4 and is slidably guided by the two sides of its inner wall to the two sides of the positioning boss 4. The U-shaped cutting tool holder 21 and its slidable insertion into the positioning boss 4 allow the positioning boss 4 to guide the sliding movement of the cutting tool holder 21, preventing the cutting blade 22 from shifting left or right during the cutting process. The positioning boss 4 is preferably a rectangular boss with two flat sides.

[0055] Some feasible specific implementation methods, such as Figure 4 and Figure 5 As shown, the beveling blade assembly 3 includes a guide boss and a beveling blade 35. The guide boss is disposed on the upper surface of the base 1, and a second inclined surface 31 is provided on the upper surface of the guide boss. The second inclined surface 31 extends along the direction from the second end to the first end (i.e., Figure 4The second inclined surface 31 is inclined downward in the opposite direction of the cutting direction, and the angle β between the second inclined surface 31 and the upper surface of the base 1 is 0° to 90°, preferably 15° to 50°. The oblique cutting blade 35 is parallel to the second inclined surface 31 and is slidably mounted on the second inclined surface 31. During cutting, the oblique cutting blade 35 slides along the second inclined surface 31 by utilizing the sliding fit with the second inclined surface 31, thereby using the second inclined surface 31 to guide the cutting direction of the oblique cutting blade 35.

[0056] Some feasible specific implementation methods, such as Figure 1 , Figure 4 and Figure 5 As shown, the guide boss includes a first guide boss 32 and a second guide boss 33 symmetrically arranged on both sides of the positioning boss 4; the upper surfaces of the first guide boss 32 and the second guide boss 33 are both provided with a second inclined surface 31, and the second inclined surface 31 of the first guide boss 32 and the second guide boss 33 are both provided with a blade groove 34 parallel to the second inclined surface 31. The blade groove 34 protrudes from the second inclined surface 31, and the oblique cutting blade 35 spans between the first guide boss 32 and the second guide boss 33, and the two ends of the oblique cutting blade 35 are slidably connected to the blade groove 34 on the first guide boss 32 and the second guide boss 33 respectively; the lower end of any blade groove 34 is provided with a blade limiting structure to prevent the oblique cutting blade 35 from coming out of the lower end of the blade groove 34. The blade limiting structure can adopt mechanisms such as protrusions and baffles, mainly to block the lower end of the blade slide groove 34, so as to prevent the oblique cutting blade 35 from slipping off due to the open setting of the lower end of the blade slide groove 34, which can improve the safety of equipment use.

[0057] The blade groove 34 and the second inclined surface 31 can be welded or bolted together.

[0058] It should be noted that when using the beveling insert 35 for cutting, the beveling insert 35 often does not reach the lowest end of the insert groove 34. Generally, the cutting edge of the beveling insert 35 is sufficient to complete the cut as long as it contacts the upper surface of the positioning boss 4. The arrangement and length of the insert groove 34 are sufficient to ensure that the beveling insert 35 contacts the upper surface of the positioning boss 4. In actual cutting, the beveling insert 35 can be slid upward along the insert groove 34 first to move the cutting edge of the beveling insert 35 away from the upper surface of the positioning boss 4. After the cutting insert 22 has finished cutting, the beveling insert 35 is pushed downward along the insert groove 34 to complete the beveling cut.

[0059] Based on the above structure, since the positions of the positioning boss 4, the blade groove 34, and the second inclined surface 31 are fixed, the contact position between the beveled blade 35 and the upper surface of the positioning boss 4 is the same each time. In practical applications, the contact position between the beveled blade 35 and the upper surface of the positioning boss 4 each time it falls can be adjusted by adjusting the height of the blade groove 34 protruding from the second inclined surface 31 and the installation position of the blade groove 34 on the second inclined surface 31.

[0060] In some feasible embodiments, a third guide boss 5 is integrally extended from the lower end of both the first guide boss 32 and the second guide boss 33. The two third guide bosses 5 are located on both sides of the positioning boss 4, and the upper surface of the third guide boss 5 and the upper surface of the positioning boss 4 are in the same plane. The cutting blade 22 can simultaneously slide and contact the upper surface of the third guide boss 5 and the upper surface of the positioning boss 4 to enhance the guiding stability of the cutting blade 22. The third guide boss 5 is a rectangular boss, and a tool holder slide 7 is formed between any one of the third guide bosses 5 and the positioning boss 4. The two arms of the U-shaped tool holder slide and guide each other with the two tool holder slides 7. This design can further improve the guiding reliability of the U-shaped tool holder, avoid blade deviation during cutting, and ensure cutting quality.

[0061] In some feasible embodiments, a fourth guide boss 6 is integrally extended from the end of the positioning boss 4 facing the second end. The fourth guide boss 6 is located between the first guide boss 32 and the second guide boss 33, and the guide surface of the fourth guide boss 6 and any one of the second inclined surfaces 31 are located in the same plane. The structure of the fourth guide boss 6 is exactly the same as the structure of the first guide boss 32 and the second guide boss 33. Figure 1 As shown, the positioning boss 4 and the fourth guide boss 6 are integrally formed, and the first guide boss 32 and the second guide boss 33 are integrally formed with their respective third guide bosses 5, thus forming three sets of identical boss structures on the base 1. The upper surface of any boss structure is an obtuse-angled slope formed by the connection of the first slope 211 and the second slope 31. The fourth guide boss 6 is located below the middle of the oblique cutting blade 35 and can effectively support and guide the oblique cutting blade 35.

[0062] In some feasible specific embodiments, the wire positioning groove 41 is a dovetail groove, such as... Figure 3As shown, the angle θ between the sidewall 411 and the bottom 412 of the dovetail groove is 25° to 90°. The bottom 412 supports the polymer filament, and the sidewall 411 uses its own slope to limit the filament, thus confining the polymer filament within the filament positioning groove 41. The dovetail groove is suitable for various shapes of filaments, such as round, square, triangular, and trapezoidal filaments, and is especially suitable for positioning triangular filaments, allowing one edge of the triangular filament to be exposed outside the groove opening 413 for cutting by the cutting blade 22. Polymer filaments such as nylon, PP, PE, and PVC can all be thinned at the ends using the cutting device of this embodiment.

[0063] In some feasible embodiments, the upper surface of the positioning boss 4 is also provided with a scale line 42 indicating the cutting length. The scale line 42 is located on the side of the wire positioning groove 41 and is arranged near the second end of the wire positioning groove 41.

[0064] Some feasible specific implementation methods, such as Figure 1 As shown, preferably, a wire positioning groove 41 is simultaneously opened on the inclined surface of the fourth guide boss 6, and the wire positioning groove 41 on the fourth guide boss 6 is connected to the wire positioning groove 41 on the positioning boss 4. The wire to be cut can be passed through the wire positioning groove 41 on the fourth guide boss 6 to the wire positioning groove 41 on the positioning boss 4. In practical applications, the extension length of the wire end 8 on the positioning boss 4 can be adjusted by pushing and pulling the wire. The length of the wire end 8 on the positioning boss 4 can be adjusted according to the scale line 42. The data is intuitive and the operation is convenient.

[0065] Initially, the U-shaped tool holder is away from the first guide boss 32 and the second guide boss 33, and the wire end 8 faces the U-shaped tool holder. Then, the U-shaped tool holder is pushed toward the first guide boss 32 and the second guide boss 33 to complete the cutting of the wire end 8 by the cutting blade 22. After cutting to the preset length, the oblique cutting blade 35 slides down to separate the part cut by the cutting blade 22 from the substrate and make the wire cross-section present an angle consistent with the second oblique surface, thereby completing the thinning process of the wire end 8 and forming the aforementioned welding transition surface 81.

[0066] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0067] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A wire cutting device, characterized in that, include: The base (1) is provided with a wire positioning groove (41), which is used to place wire. The groove (413) of the wire positioning groove (41) allows the part to be cut at the end of the wire to protrude. The cutting tool assembly (2) is located at the first end of the wire positioning groove (41) and is capable of cutting the part to be cut along the length direction of the wire by a preset length. The oblique cutting blade assembly (3) is located at the second end of the wire positioning groove (41) and can obliquely cut the part cut by the cutting blade assembly (2) so that the end of the wire forms a welding transition surface (81).

2. The wire cutting device according to claim 1, characterized in that, The upper surface of the base (1) is also provided with a positioning boss (4), and the upper surface of the positioning boss (4) is provided with a plurality of parallel wire positioning grooves (41).

3. The wire cutting device according to claim 2, characterized in that, The cutting tool set (2) includes: The cutting tool holder (21) slides in contact with the upper surface of the base (1); A cutting blade (22) is disposed at the end of the cutting tool holder (21) near the second end. The cutting edge of the cutting blade (22) is slidably guided to the upper surface of the positioning boss (4) so ​​that the part to be cut can be cut to a preset length along the length direction of the wire under the sliding action of the cutting tool holder (21).

4. The wire cutting device according to claim 3, characterized in that, The upper surface of the cutting tool holder (21) is configured as a first inclined surface (211). The first inclined surface (211) is inclined downward along the direction from the first end to the second end, and the included angle α between the first inclined surface (211) and the upper surface of the base (1) is 0° to 80°. The cutting blade (22) is disposed at the lower end of the first inclined surface (211) and is parallel to the first inclined surface (211).

5. The wire cutting device according to claim 3 or 4, characterized in that, The cutting tool holder (21) is a U-shaped tool holder with its opening facing the oblique cutting tool group (3). The U-shaped tool holder is inserted into the positioning boss (4) so ​​that the inner walls of the U-shaped tool holder slide and guide each other with the two sides of the positioning boss (4).

6. The wire cutting device according to any one of claims 2 to 4, characterized in that, The oblique cutting blade assembly (3) includes: A guide boss is provided on the upper surface of the base (1). The upper surface of the guide boss is provided with a second inclined surface (31). The second inclined surface (31) is inclined downward along the direction from the second end to the first end, and the included angle β between the second inclined surface (31) and the upper surface of the base (1) is 0° to 90°. The bevel cutting blade (35) is parallel to the second bevel (31) and is slidably mounted on the second bevel (31).

7. The wire cutting device according to claim 6, characterized in that, The guide boss includes a first guide boss (32) and a second guide boss (33) symmetrically arranged on both sides of the positioning boss (4); The upper surfaces of the first guide boss (32) and the second guide boss (33) are both provided with the second inclined surface (31), and the second inclined surface (31) of the first guide boss (32) and the second guide boss (33) are both provided with blade grooves (34) parallel to the second inclined surface (31). The oblique cutting blade (35) spans between the first guide boss (32) and the second guide boss (33), and the two ends of the oblique cutting blade (35) are slidably connected to the blade grooves (34) on the first guide boss (32) and the second guide boss (33), respectively. Each of the blade grooves (34) is provided with a blade limiting structure at its lower end to prevent the oblique cutting blade (35) from coming out of the lower end of the blade groove (34).

8. The wire cutting device according to claim 7, characterized in that, The lower ends of the first guide boss (32) and the second guide boss (33) are integrally provided with a third guide boss (5). The two third guide bosses (5) are located on both sides of the positioning boss (4), and the upper surface of the third guide boss (5) and the upper surface of the positioning boss (4) are in the same plane. The positioning boss (4) extends integrally with a fourth guide boss (6) at the end facing the second end. The fourth guide boss (6) is located between the first guide boss (32) and the second guide boss (33), and the guide surface of the fourth guide boss (6) and any one of the second inclined surfaces (31) are located in the same plane.

9. The wire cutting device according to any one of claims 1 to 4, characterized in that, The wire positioning groove (41) is a dovetail groove, and the angle θ between the side wall (411) and the bottom (412) of the dovetail groove is 25° to 90°.

10. The wire cutting device according to any one of claims 2 to 4, characterized in that, The upper surface of the positioning boss (4) is also provided with a scale line (42) indicating the cutting length. The scale line (42) is located on the side of the wire positioning groove (41) and is arranged close to the second end of the wire positioning groove (41).

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