Combined type diamond cutting straight cutter

Abstract

The utility model relates to the field of woodworking tools. The combined type diamond cutting straight cutter comprises a cutter handle and a cutter body arranged at the front end of the cutter handle, the cutter body is provided with at least one pair of installation parts, the installation parts extend in the length direction of the cutter body, blades are welded and fixed to the installation parts, and the outer side edges of the blades extend outwards to exceed the cutter body to form cutting parts; one part of the blades is a hard alloy blade, and the other part of the blades is a diamond blade. According to the utility model, the service life is relatively long while the sharpness is ensured.

Description

Technical Field

[0001] The utility model relates to the field of woodworking knives, in particular to a cutting knife. Background Art

[0002] The cutting knife is a plate processing tool used in woodworking automated processing equipment. It is installed on the head of the CNC engraving machine (cutting machine). The head drives the active movement on the X, Y, and Z axes, and cooperates with its own high-speed rotation to achieve cutting of the plate. At present, the commonly used cutting knives on the market are classified according to their structural form, mainly including: spiral cutting knives, straight cutting knives, etc.; according to the material of the cutting edge, they are mainly divided into: diamond cutting knives, alloy cutting knives, etc.

[0003] Alloy cutting knives use high-strength carbide as the cutting edge material. Their processing methods are mature and reliable, and their products have sharp cutting edges and low costs. They are the most mature cutting tools so far. However, due to their poor wear resistance, their service life is often unsatisfactory. When the processing volume is large, as their sharpness decreases rapidly, the tools need to be replaced frequently. Diamond cutting knives have great advantages over alloy cutting knives in terms of service life due to their high hardness and good wear resistance. However, due to the fact that the existing civilian diamond material processing methods mainly use electrospark machining and laser mechanics, the sharpness of their cutting edges cannot always reach the best ideal state compared to new alloy cutting knives, resulting in a relatively poor upper limit for the processing quality of the processed plates. In short, it can be seen that: in the new knife stage, the alloy cutting quality is significantly better than diamond; and with use, the alloy knife cutting quality decreases rapidly, while the diamond knife decreases slowly. Therefore, if the respective advantages of the two can be combined to form a composite cutting tool, the respective defects of the two can be compensated to a certain extent. Summary of the invention

[0004] The utility model aims to provide a composite diamond cutting straight knife with excellent durability and sharpness.

[0005] To achieve the above-mentioned purpose of the invention, the technical solution adopted by the utility model is: a composite diamond cutting straight knife, including a handle and a knife body arranged at the front end of the handle, the knife body is provided with at least one pair of mounting parts, the mounting parts extend along the length direction of the knife body, a blade is welded and fixed at the mounting parts, the outer edge of the blade extends outward beyond the knife body to form a cutting part; a part of the blade is a carbide blade, and the other part is a diamond blade.

[0006] Preferably, the mounting portion comprises a mounting step and a positioning groove extending from the inner side of the mounting step toward the center of the blade body, and the inner edge of the blade is clamped in the positioning groove.

[0007] Preferably, the number of the mounting parts is two pairs, and the mounting parts are centrally symmetrically distributed around the axis of the cutter body; carbide blades are arranged on one pair of the mounting parts, and diamond blades are arranged on the other pair of the mounting parts.

[0008] Preferably, a positioning shoulder is provided at one end of the knife handle close to the knife body.

[0009] Preferably, a center hole extending along the length direction of the blade body is arranged at the center of the blade body, the center hole extends to the end of the blade body, and a cemented carbide reinforcement tube is arranged in the center hole.

[0010] Preferably, the handle diameter of the knife is 1 / 2 inch.

[0011] Preferably, the cutting portion of the blade is provided with a chip breaker groove, and the chip breaker grooves on two adjacent blades are staggered with each other.

[0012] The beneficial effects of the utility model are mainly reflected in that it has a good service life while ensuring sharpness. Specifically, the blade of the utility model adopts the method of combining cemented carbide and diamond, and has the characteristics of strong machinability and high sharpness of cemented carbide blades. By utilizing the high sharpness of cemented carbide blades, the advantages of trimming and shaping are mainly brought into play, which can greatly improve the cutting quality; at the same time, by adding diamond blades, the cutting amount of cemented carbide blades can be shared, which greatly alleviates the wear of cemented carbide blades, and finally achieves a better balance between cutting quality and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a top view of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of a preferred embodiment of the utility model;

[0016] Figure 4 This is a schematic structural diagram of another preferred embodiment of the utility model. DETAILED DESCRIPTION

[0017] like Figure 1-4 The composite diamond cutting straight knife shown in the figure has the advantages of both traditional diamond tools and carbide tools, and has a greatly improved service life while achieving better cutting flatness and explosion-proof edge advantages.

[0018] The utility model is similar to a traditional tool in that it includes a shank 1 and a tool body 2 arranged at the front end of the shank 1, wherein the shank diameter of the shank 1 is most commonly 1 / 2 inch for a cutting machine, and of course, it can also be 1 / 4 inch or other shank diameter sizes, and can be designed according to the compatible machine model and tool chuck.

[0019] Since the cutter body 2 is not directly used as the cutting edge material but as the installation base of the blade, an integrated structure can usually be directly adopted, that is, the handle 1 and the cutter body 2 usually adopt relatively low-cost ordinary cemented carbide, and more expensive tungsten steel alloy can be omitted to appropriately reduce costs.

[0020] The utility model provides at least one pair of mounting portions 3 on the cutter body 2, wherein the mounting portions 3 extend along the length direction of the cutter body 2, and a blade is welded and fixed to the mounting portions 3, and the outer edge of the blade extends outward beyond the cutter body 2 to form a cutting portion (i.e., a cutting edge portion), which is used for milling during high-speed rotation.

[0021] The biggest difference of the present invention is that part of the blade is a carbide blade 4, and the other part is a diamond blade 5. In principle, the present invention can only be provided with a pair of mounting parts 3, and the two mounting parts 3 are respectively provided with a carbide blade 4 and a diamond blade 5 to form a two-edged tool. However, in order to share the cutting workload of each blade and to better exert the characteristics of each blade, the number of mounting parts 3 of the present invention is preferably set to two pairs, and the mounting parts 3 are centrally symmetrically distributed around the axis of the cutter body 2. One pair of mounting parts 3 is provided with a carbide blade 4, and the other pair of mounting parts 3 is provided with a diamond blade 5.

[0022] like Figure 2 As shown in the figure, the upper and lower pairs of blades are carbide blades 4, and the left and right pairs of blades are diamond blades 5. By increasing the number of blades (basically two or three blades at present), the cutting workload is further shared. At the same time, blades of the same material are used on the opposite sides, which can also improve the rotational dynamic balance and reduce the risk of tool swing and jump.

[0023] The mounting portion 3 of the present invention is used to mount the blade, and it can be a simple stepped surface, but a better approach is also possible, such as Figure 2 As shown, the mounting portion 3 includes a mounting step 6 and a positioning groove 7 extending toward the center of the blade body 2 from the inner side of the mounting step 6, and the inner edge of the blade is clamped in the positioning groove 7. On the one hand, the positioning accuracy can be improved, and on the other hand, the reliability after welding can also be improved.

[0024] In addition, another characteristic of the present invention is that Figure 1 and 2As shown in the figure, the center of the blade body 2 is provided with a center hole extending along the length direction of the blade body 2, the center hole extends to the end of the blade body 2, and a hard alloy reinforcing tube 9 is provided in the center hole. Among them, tungsten steel alloy is preferred. By providing the center hole and the relatively strong reinforcing tube 9, on the one hand, the overall strength of the blade body (including the blade) can be improved, and the risk of blade breakage can be reduced. On the other hand, the hollow design is conducive to the rapid discharge of heat from the blade body, avoiding heat congestion, maintaining thermal stability during continuous operation, and also reducing the risk of deformation and blade breakage.

[0025] For this product, its positioning on the tool holder on the cutting machine head can be positioned by positioning line, that is, a positioning line that is easy to observe is formed on the tool handle 1 by laser marking, engraving, etc., and the depth of insertion into the tool holder fixture is based on the positioning line. Alternatively, a positioning shoulder 8 is provided at one end of the tool handle 1 close to the tool body 2. Positioning by positioning shoulder 8 is faster, but the disadvantage is that the cost is relatively higher.

[0026] In addition, in order to further improve the cutting effect, the cutting portion of the blade of the utility model is provided with a chip breaker groove 10, and the chip breaker grooves 10 on two adjacent blades are staggered. The chip breaker groove 10 can break the wood fibers in the cutting process and improve the chip removal effect.

Claims

1. A composite diamond cutting straight knife, comprising a knife handle (1) and a knife body (2) arranged at the front end of the knife handle (1), the knife body (2) being provided with at least one pair of mounting parts (3), the mounting parts (3) extending along the length direction of the knife body (2), a blade being welded and fixed at the mounting parts (3), the outer edge of the blade extending outwardly beyond the knife body (2) to form a cutting part; characterized in that: A part of the blades is a hard alloy blade (4), and the other part is a diamond blade (5).

2. The composite diamond cutting straight knife according to claim 1, characterized in that: The mounting portion (3) comprises a mounting step (6) and a positioning groove (7) extending from the inner side of the mounting step (6) toward the center of the blade body (2), and the inner edge of the blade is clamped in the positioning groove (7).

3. The composite diamond cutting straight knife according to claim 2, characterized in that: The number of the mounting parts (3) is two pairs, and the mounting parts (3) are centrally symmetrically distributed around the axis of the cutter body (2); one pair of the mounting parts (3) is provided with a carbide blade (4), and the other pair of the mounting parts (3) is provided with a diamond blade (5).

4. The composite diamond cutting straight knife according to claim 1, characterized in that: A positioning shoulder (8) is provided at one end of the knife handle (1) close to the knife body (2).

5. The composite diamond cutting straight knife according to any one of claims 1 to 3, characterized in that: A central hole extending along the length direction of the blade body (2) is arranged at the center of the blade body (2), the central hole extends to the end of the blade body (2), and a hard alloy reinforcement tube (9) is arranged in the central hole.

6. The composite diamond cutting straight knife according to claim 5, characterized in that: The handle (1) has a diameter of 1 / 2 inch.

7. The composite diamond cutting straight knife according to claim 6, characterized in that: The cutting portion of the blade is provided with a chip breaker groove (10), and the chip breaker grooves (10) on two adjacent blades are staggered with each other.

Images