Big and small two-piece engraving tool

Abstract

The utility model discloses a big and small two piece formula engraving tool belongs to the tool processing field, big and small two piece formula engraving tool includes: handle, two cutter bodies, two cutter bodies symmetry staggered distribution, and two cutter bodies have a center line along the length direction, first blade, second blade, first blade, second blade fixed connection in the inside of two cutter bodies, wherein, the size of first blade is greater than second blade, and first blade cutter head has complete cutter tip, and first blade cutter head projects center line, and the peripheral edge angle of first blade and second blade is 15 25 DEG. The utility model has adopted the first blade and second blade of asymmetric formula design, and the size of first blade is greater than second blade, and first welding surface and second welding surface adopt the mode of plane welding, and the welding contact area is increased significantly, and because first blade cutter head has complete cutter tip, and two half piece cutter tip separation phenomenon also will not occur, and the cutting performance of engraving tool is fundamentally improved.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool processing, specifically to two carving tools, one large and one small. Background Technology

[0002] Carving knives, as essential tools for wood carving, typically consist of two identical blades symmetrically welded together. However, the small contact area at the blade tips leads to difficult welding, a high damage rate, and a short tool life. Furthermore, unsuitable blade angle parameters result in high cutting resistance and poor chip removal performance. Therefore, there is an urgent need to develop a new type of carving knife to address the problems of low blade connection strength, short service life, and poor chip removal performance. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a two-piece engraving knife with one large and one small blade.

[0004] The technical solution of this utility model is: a two-piece carving knife, one large and one small, comprising:

[0005] Handle;

[0006] The blades are symmetrically and alternately distributed, and the two blades have a center line along their length.

[0007] The first blade and the second blade are fixedly connected to the inner side of the two blade bodies;

[0008] The first blade is larger than the second blade, the first blade tip has a complete cutting tip, the first blade tip extends beyond the center line, and the circumferential cutting angle of the first and second blades is 15-25°.

[0009] Furthermore, the second blade tip is flat.

[0010] Furthermore, the first blade tip is provided with a first welding surface, and the second blade tip is provided with a second welding surface, the shapes of the first welding surface and the second welding surface are matched.

[0011] Furthermore, the first welding surface near the tip of the blade is in the shape of a stepped hook.

[0012] Furthermore, a copper sheet is provided between the first welding surface and the second welding surface.

[0013] Furthermore, the first welding surface and the second welding surface are fixedly connected by welding.

[0014] Furthermore, the first blade also includes a first back blade, and the tip of the first blade and the first back blade form an arc transition.

[0015] Furthermore, the first and second blades are mounted at an angle of 4-12° on the blade body.

[0016] Furthermore, the handle is integrally formed with the two blades.

[0017] Furthermore, the handle is made of 40CR steel.

[0018] The beneficial technical effects of this utility model are:

[0019] 1. This utility model adopts an asymmetrical design for the first and second blades. The first blade is larger than the second blade. The first blade tip has a complete cutting tip and a first welding surface is provided near the cutting tip. The second blade tip does not have a cutting tip, and the end of the second blade tip is the second welding surface. The first welding surface and the second welding surface are welded in a planar manner, which significantly increases the welding contact area. Furthermore, since the first blade tip has a complete cutting tip, the phenomenon of the two halves of the cutting tip separating will not occur, fundamentally improving the performance of the engraving tool.

[0020] 2. The present invention provides a copper sheet between the first welding surface and the second welding surface. The copper sheet serves as a welding auxiliary material, which further improves the welding strength between the first blade and the second blade.

[0021] 3. The peripheral cutting angle of the first and second blades of this utility model is 15-25°, the installation slope of the first and second blades on the blade body is 4-12°, and the blade tip and blade back of the first blade are connected by an arc surface transition. The appropriate cutting angle, installation slope and arc surface transition reduce cutting resistance and make chip removal smoother. Attached Figure Description

[0022] Figure 1 This is a front view of the two-piece carving knife of this utility model, one large and one small.

[0023] Figure 2 This is a rear view of the two-piece carving knife of this utility model, one large and one small.

[0024] Figure 3 This is a left view of the two-piece carving knife of this utility model, one large and one small.

[0025] Figure 4 This is a right view of the two-piece carving knife of this utility model, one large and one small.

[0026] Figure 5 This is a bottom view of the two-piece carving knife of this utility model, one large and one small;

[0027] Figure 6 This is a top view of the two-piece carving knife of this utility model, one large and one small.

[0028] Figure 7This is a schematic diagram of the first blade structure of this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the second blade of this utility model;

[0030] Figure 9 This is a schematic diagram of the welding of the first and second blades of this utility model;

[0031] in,

[0032] 1. Knife handle;

[0033] 2. Blade body; 21. Centerline;

[0034] 3. First blade; 31. First cutting edge; 32. First back of blade; 33. Blade tip; 34. First welding surface;

[0035] 4. Second blade; 41. Second cutting edge; 42. Second blade back; 43. Second welding surface;

[0036] 5. Copper sheet. Detailed Implementation

[0037] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0038] See Figure 1-9 This specific embodiment discloses a two-piece carving knife, one large and one small. The carving knife includes a handle 1 made of 40CR steel and two blades 2 integrally formed with the handle 1. A first blade 3 and a second blade 4 are welded to the inner sides of the two blades 2. The two blades 2 are symmetrically and alternately distributed, with some blades overlapping. Based on the length direction of the blades, the two blades have a center line 21 along the length direction.

[0039] Please see Figure 1 , 7-9. This specific embodiment abandons the traditional symmetrically distributed two-blade engraving knife and adopts an asymmetrical design for the first blade 3 and the second blade 4. The first blade 3 has a first cutting edge 31 and a first backing edge 32, and the second blade 4 has a second cutting edge 41 and a second backing edge 42. The size of the first blade 3 is larger than that of the second blade 4. In terms of shape, the first blade tip has a complete cutting tip 33, and a first welding surface 34 is provided near the cutting tip 31. The first welding surface 34 is in the shape of a stepped hook near the cutting tip. In contrast, the second blade tip 4 no longer has a cutting tip, and the end of the second blade tip is a flat surface, which is the second welding surface 43. When the first blade 3 and the second blade 4 are assembled, since the first blade 3 has a complete blade tip, the blade tip of the first blade extends beyond the center line 21 of the two blade bodies. The second welding surface 43 of the second blade 4 contacts the first welding surface 34 of the first blade and is fixed by welding. This design overcomes the defects of traditional two-half blade tips having small welding area, weak bonding strength, and easy separation of the two-half blade tips. In this specific embodiment, the first welding surface and the second welding surface adopt a planar welding method, which significantly increases the welding contact area. Furthermore, since the first blade tip has a complete blade tip 33, the phenomenon of separation of the two-half blade tips will not occur, fundamentally improving the cutting performance of the engraving tool.

[0040] Please see Figure 9 In order to increase the bonding strength between the first blade 3 and the second blade 4, a copper sheet 5 is provided between the first welding surface 34 and the second welding surface 43. The copper sheet 5 serves as a welding auxiliary material, which further improves the bonding strength between the first blade 3 and the second blade 4.

[0041] Please see Figure 6 The peripheral cutting angles of the first blade 3 and the second blade 4 are 15-25°. In this specific embodiment, the peripheral cutting angles of the first blade and the second blade are 15-25°. This range of cutting angles can reduce cutting resistance, ensure the flatness of the wood sample, smooth chip removal, and high machining accuracy.

[0042] Please see Figure 4 Regarding the shape of the first blade, in terms of the structural design of the cutting edge and the back of the blade, the tip 33 of the first blade and the back of the blade 32 are in an arc transition. The arc transition structure makes the back of the blade lower than the tip of the blade, which helps the cutting chips to be discharged smoothly.

[0043] Please see Figure 4 The first blade 3 and the second blade 4 are mounted on the tool body at an angle of 4-12°. The angled mounting of the first blade 3 and the second blade 4 optimizes the cutting rake angle and reduces the cutting resistance, which can improve the feed rate or cutting depth. In addition, the appropriate mounting angle can reduce the contact length between the cutting edge and the wood sample, reduce the friction area, and improve the heat dissipation performance.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A two-piece carving knife, one large and one small, characterized in that, include: Handle (1); Two blades (2) are symmetrically and alternately distributed, and the two blades have a center line (21) along the length direction. The first blade (3) and the second blade (4) are fixedly connected to the inner side of the two blade bodies (2); The first blade (3) is larger than the second blade (4), the first blade (3) has a complete blade tip (33), the first blade tip extends beyond the center line (21), and the circumferential cutting angle of the first blade (3) and the second blade (4) is 15-25°.

2. The two-piece carving knife of one large and one small as described in claim 1, characterized in that, The tip of the second blade (4) is flat.

3. The two-piece carving knife of one large and one small as described in claim 2, characterized in that, The first blade tip has a first welding surface (34), and the second blade tip has a second welding surface (43). The shapes of the first welding surface (34) and the second welding surface (43) are matched.

4. The two-piece carving knife of one large and one small as described in claim 3, characterized in that, The first welding surface (34) is adjacent to the blade tip (33) in a stepped hook shape.

5. The two-piece carving knife of one large and one small as described in claim 4, characterized in that, A copper sheet (5) is provided between the first welding surface (34) and the second welding surface (43).

6. The two-piece carving knife of one large and one small as described in claim 5, characterized in that, The first welding surface (34) and the second welding surface (43) are fixedly connected by welding.

7. The two-piece carving knife of one large and one small as described in claim 1, characterized in that, The first blade (3) also includes a first back (32), and the blade tip (33) of the first blade and the first back (32) are in a curved transition.

8. The two-piece carving knife of one large and one small as described in claim 7, characterized in that, The first blade (3) and the second blade (4) are mounted on the blade body (2) at an angle of 4-12°.

9. The two-piece carving knife of one large and one small as described in claim 1, characterized in that, The handle (1) and the two blades (2) are integrally formed.

10. The two-piece carving knife of one large and one small according to claim 1, characterized in that, The handle (1) is made of 40CR steel.

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