Cutting tool for cutting wood, method of manufacturing the same and cutting device

Abstract

The application provides a tool for cutting wood, a manufacturing method and a cutting device, the tool comprising a tool body, at least one cutting edge and a coating; the cutting edge is located on one side of the tool body in the width direction; the coating is arranged on the surface of the tool body, and the coating comprises a first fluorine-containing polymer and a second fluorine-containing polymer, wherein the glass transition temperature of the first fluorine-containing polymer is greater than that of the second fluorine-containing polymer, the difference (B-A) between the surface tension A of the coating at 25 DEG C and the surface tension B of the coating at 50 DEG C is 5 mN / m-15 mN / m, and the coating has a water surface contact angle of 120 DEG-170 DEG measured by ASTM D7334. The tool has small resistance change during use, thereby improving the working efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutters, in particular to a cutter for cutting wood, a manufacturing method thereof and a cutting device. BACKGROUND

[0002] In recent years, with the rapid development of science and technology and the building material industry, wood processing methods are becoming increasingly mechanized and intelligent, and cutting processing is also developing towards high efficiency and high precision.

[0003] Cutting processing generally refers to a mechanical processing method that uses a cutter to remove excess material from the surface of wood, so as to ensure that the geometric shape, size precision, surface roughness and surface layer quality meet the design requirements. However, in the related art, during the cutting process of the cutter on wood, the resistance received by the cutter will become larger and larger as the cutting time increases, resulting in a decrease in the working efficiency of the cutter. SUMMARY

[0004] The present application provides a cutter for cutting wood, a manufacturing method thereof and a cutting cutter, which has a small change in resistance during use, thereby improving the working efficiency thereof.

[0005] In a first aspect, the embodiments of the present application provide a cutter for cutting wood, comprising a cutter body, at least one cutting edge and a coating; the cutting edge is located on one side of the width direction of the cutter body; the coating is arranged on the surface of the cutter body, and the coating comprises a first fluorine-containing polymer and a second fluorine-containing polymer, wherein the glass transition temperature of the first fluorine-containing polymer is greater than the glass transition temperature of the second fluorine-containing polymer, the difference (B-A) between the surface tension A of the coating at 25°C and the surface tension B of the coating at 50°C is 5 mN / m-15 mN / m, and the coating has a water surface contact angle of 120°-170° measured by ASTM D7334.

[0006] According to some optional embodiments of the present application, the coating has a water surface contact angle of 140°-160° measured by ASTM D7334.

[0007] According to some optional embodiments of the present application, the glass transition temperature of the first fluorine-containing polymer is 250°C-300°C, and the glass transition temperature of the second fluorine-containing polymer is 150°C-200°C.

[0008] According to some optional embodiments of the present application, the first fluorine-containing polymer comprises a fluorine-containing polyamide, and the second fluorine-containing polymer comprises a fluorine-containing polyether.

[0009] According to some optional embodiments of the present application, the mass ratio of the first fluorine-containing polymer to the second fluorine-containing polymer is (1-3):1.

[0010] According to some optional embodiments of the present application, the mass fraction of the first fluorine-containing polymer in the coating is 20%-30% and the mass fraction of the second fluorine-containing polymer in the coating is 10%-15%, based on 100% of the mass fraction of the coating.

[0011] According to some optional embodiments of the present application, the coating further comprises inorganic wear-resistant particles.

[0012] According to some optional embodiments of the present application, the inorganic wear-resistant particles comprise metal oxide particles.

[0013] In a second aspect, the embodiments of the present application further provide a manufacturing method of the tool according to the first aspect of the present application, the tool comprising a tool body and at least one cutting edge located on one side of the tool body in the width direction, the manufacturing method comprising:

[0014] applying raw materials containing the first fluorine-containing polymer and the second fluorine-containing polymer to the surface of the tool body to form a coating.

[0015] In a third aspect, the embodiments of the present application further provide a cutting device comprising the tool according to the first aspect of the present application and / or the tool manufactured by the manufacturing method according to the second aspect of the present application.

[0016] The tool for cutting wood, the manufacturing method thereof and the cutting tool provided by the embodiments of the present application can reduce the adhesion of the excess material such as wood chips generated in the process of cutting wood to the surface of the tool, thereby reducing the growth range of the resistance suffered by the tool, and improving the working efficiency of the tool.

[0017] The above description is only a summary of the technical solutions of the present application. In order to make the technical solutions of the present application more clearly understood and implemented according to the content of the present application, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described below.

[0018] Drawings of the present application

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative effort.

[0020] Figure 1 A structural schematic diagram of a tool provided by some embodiments of the present application is shown.

[0021] The reference signs in the detailed description are as follows:

[0022] 10 - tool;

[0023] 100 - tool body;

[0024] 200 - cutting edge. DETAILED DESCRIPTION

[0025] The "range" disclosed in the present application is limited in the form of lower limit and upper limit, and a given range is limited by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of the specific range. The range limited in this way can include or not include the end value, and can be arbitrarily combined, i.e. any lower limit can be combined with any upper limit to form a range.

[0026] If not specifically stated, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions, and such technical solutions should be considered to be included in the disclosure of the present application.

[0027] If not specifically stated, all technical features and optional technical features of the present application can be combined with each other to form new technical solutions, and such technical solutions should be considered to be included in the disclosure of the present application.

[0028] If not specifically stated, all steps of the present application can be performed in sequence or randomly, and the preferred method is to be performed in sequence. For example, the method comprises steps (a) and (b), which means that the method can comprise steps (a) and (b) performed in sequence, or steps (b) and (a) performed in sequence. For example, the method can further comprise step (c), which means that step (c) can be added to the method in any order, for example, the method can comprise steps (a), (b) and (c), or steps (a), (c) and (b), or steps (c), (a) and (b), etc.

[0029] If not specifically stated, the "comprising" and "including" mentioned in the present application represent open-ended, and can also be closed-ended. For example, the "comprising" and "including" can represent that other components not listed can also be included, or only the listed components can be included.

[0030] If not specifically stated, the term "or" in the present application is inclusive. For example, the phrase "A or B" represents "A, B, or both A and B". More specifically, any one of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0031] Unless otherwise specified, the terms used in the present application have the commonly understood meanings understood by those skilled in the art.

[0032] Unless otherwise specified, the values of the parameters mentioned in the present application can be measured by various test methods commonly used in the art, for example, can be measured according to the test methods given in the embodiments of the present application.

[0033] The cutter provided by the embodiments of the present application can be used for multi-process machining of plate materials such as cutting machining of various wood-based boards such as shaving board, density board, double veneer board, etc. by a numerical control carving machine and various woodworking machining centers, such as cutting, drilling, grooving, bottom cleaning, carving and edge trimming.

[0034] Please refer to Figure 1 As shown in the drawings, in some embodiments of the present application, the cutter 10 comprises a cutter body 100, at least one cutting edge 200 and a coating; the cutting edge 200 is located on one side of the cutter body 100 in the width direction; the coating is arranged on the surface of the cutter body 100, the coating comprises a first fluorine-containing polymer and a second fluorine-containing polymer, wherein the glass transition temperature of the first fluorine-containing polymer is greater than the glass transition temperature of the second fluorine-containing polymer, the difference (B-A) between the surface tension A of the coating at 25°C and the surface tension B of the coating at 50°C is 5mN / m-15mN / m, and the coating has a water surface contact angle of 120°-170° measured by ASTM D7334.

[0035] The glass transition temperature herein has the meaning known in the art, i.e. generally refers to the temperature at which a substance finally changes from a solid state to a liquid state when gradually heated, which can be measured using known methods or equipment, for example, the glass transition temperature of a material can be measured using a differential scanning calorimeter.

[0036] The surface tension herein has the meaning commonly known in the art, i.e. the surface tension refers to the tension acting along the surface of a liquid, due to the cohesive forces at the surface of a coating. The surface tension can be measured by a method or apparatus commonly used in the art, such as a rotating drop interfacial tension meter, a microcomputerized surface tension meter, a static force surface tension meter, etc. For example, the surface tension can be measured by a static surface tension meter (CBVP-Z: made by Kyowa Interface Science Co., Ltd.) using the Wilhelmy method, to determine the static surface tension of the coating at 25°C and 50°C, respectively, in units of mN / m.

[0037] The water surface contact angle herein refers to the angle at which water interfaces contact the surface of the coating, which is determined by ASTM D7334 at a temperature of 25°C. The water surface contact angle can also be referred to as the wetting angle, both of which can represent a measure of the degree of wetting. If the water surface contact angle is less than 90°, the solid is hydrophilic, i.e. the liquid wets the solid, and the smaller the angle, the better the wettability; if the water surface contact angle is greater than 90°, the solid is hydrophobic, i.e. the liquid does not wet the solid and is easily moved on the surface.

[0038] The cutting tool 10 for cutting wood provided by the embodiments of the present application has a coating layer arranged on the surface of the tool body 100, and the coating layer comprises a first fluorine-containing polymer and a second fluorine-containing polymer, the glass transition temperature of the first fluorine-containing polymer is greater than the glass transition temperature of the second fluorine-containing polymer, the difference (B-A) between the surface tension A of the coating layer at 25°C and the surface tension B of the coating layer at 50°C is 5 mN / m-15 mN / m, and the coating layer has a water surface contact angle of 120°-170° determined by ASTM D7334. Therefore, when the cutting tool 10 is in use, the surface tension of the coating layer changes little as the cutting time increases and the surface temperature rises, and the coating layer also has a large water surface contact angle, which can reduce the adhesion of the excess material such as wood chips generated in the cutting of wood to the surface of the cutting tool 10, thereby reducing the amplitude of the increase in the resistance thereof, and thus improving the working efficiency of the cutting tool 10.

[0039] In the embodiments of the present application, the cutting tool 10 can be a TCT (Tungsten Carbide Tipped) tool, wherein the TCT is a new material with high hardness, high strength and high wear resistance, which is made of metal powder such as tungsten and cobalt and carbide powder by high-temperature sintering, and the cutting tool 10 is a cutting cutting edge 200 made of the TCT. It can be understood that the cutting edge 200 in the cutting tool 10 of the present application can be made of the TCT.

[0040] In some optional embodiments of the present application, the cutting tool 10 can be a TCT three-blade roughing cutter or a TCT double-blade straight cutter.

[0041] In some embodiments of the present application, the cutter 10 comprises two pairs of cutting edges 200, one pair of cutting edges 200 is provided with more than two chip breakers, and the other pair of cutting edges 200 is not provided with chip breakers. The two pairs of cutting edges 200 are installed in a staggered manner, and the cutting edges 200 are provided with cutting portions.

[0042] In the above-mentioned embodiments, the cutter 10 adopts two different structures of cutting edges 200. One pair of cutting edges 200 is provided with chip breakers, and the chip breakers are distributed in a staggered manner, so that the wood chips are broken as much as possible during cutting, and the wood chips are more easily discharged, thereby improving the heat dissipation and stability of the cutter 10. The other pair of cutting edges 200 without chip breakers can improve the cutting speed of the cutter 10, so that the surface of the plate material reaches a fine polishing quality, and the workpiece has better surface appearance.

[0043] In some optional embodiments of the present application, the cutting edges 200 can include straight cutting edges 200 and double-bevel cutting edges 200, wherein the double-bevel cutting edges 200 are respectively provided with positive and negative single bevels, so that the cutter 10 has a double-helix cutting feeling during cutting. The cutter 10 has both upward tension and downward pressure on the plate material. Under the traction of the double action force, the cutter 10 is tightly cut on the plate material, thereby protecting the plate surface from being easily broken, and the surface cutting of the veneer is more crisp and neat, which is more suitable for the processing of double-veneered panels.

[0044] In the embodiments of the present application, the cutting edges 200 are divided into rough milling cutting edges 200 and fine milling cutting edges 200. The inclination angle θ1 of the rough milling cutting edges 200 is between -1° and -5°, and the inclination angle θ2 of the fine milling cutting edges 200 is between 1° and 5°. The above-mentioned cutting edges 200 have a tooth gap angle α, an end tooth angle β, a first and second side clearance angle δ1 and δ2, and a first and second clearance angle γ1 and γ2. The tooth gap angle α is between 40° and 50°, the end tooth angle β is between 2° and 7°, the first side clearance angle δ1 is between 10° and 22°, the second side clearance angle δ2 is between 25° and 40°, the first clearance angle γ1 is between 12° and 25°, and the second clearance angle γ2 is between 25° and 40°.

[0045] In some optional embodiments of the present application, the coating has a water surface contact angle of 140°-160° measured by ASTM D7334. The water surface contact angle of the coating is set in the above-mentioned range, which can further reduce the time of wood chips staying on the cutter 10, thereby reducing the resistance of the cutter 10 during cutting, and improving the working efficiency of the cutter 10.

[0046] For example, the coating layer can have a water surface contact angle of 120°, 122°, 124°, 126°, 128°, 130°, 132°, 134°, 136°, 138°, 140°, 142°, 144°, 146°, 148°, 150°, 152°, 154°, 156°, 158°, 160°, 162°, 164°, 166°, 168°, 170°, or 120°-170°, but not limited to the above values or a range of values between any two of the above values.

[0047] In the embodiments of the present application, the first fluorine-containing polymer and the second fluorine-containing polymer have suitable parameters, which can help reduce the degree of temperature influence on the cutting tool 10 during cutting, and can also help improve the hydrophobicity of the coating layer, thereby further reducing the time of wood chips staying on the cutting tool 10 to reduce the growth rate of the resistance of the cutting tool 10 during cutting, thereby improving the working efficiency of the cutting tool 10.

[0048] In some optional embodiments of the present application, the glass transition temperature of the first fluorine-containing polymer is 250-300°C, and the glass transition temperature of the second fluorine-containing polymer is 150-200°C. When the first fluorine-containing polymer and the second fluorine-containing polymer are within the above ranges, respectively, the first fluorine-containing polymer and the second fluorine-containing polymer can synergize with each other to reduce the occurrence of excessive increase in the surface tension of the coating layer due to the temperature rise of the cutting tool 10 during cutting.

[0049] In some optional embodiments of the present application, the first fluorine-containing polymer includes a fluorine-containing polyamide, and the second fluorine-containing polymer includes a fluorine-containing polyether. The selection of these fluorine-containing polymers can further reduce the surface tension of the coating layer to enhance the hydrophobicity, while further reducing the occurrence of the increase in the surface tension due to the temperature rise of the cutting tool 10 during cutting.

[0050] In some optional embodiments of the present application, the mass ratio of the first fluorine-containing polymer to the second fluorine-containing polymer is (1-3):1. When the mass ratio of the first fluorine-containing polymer to the second fluorine-containing polymer is within the above range, the surface tension of the coating layer can be further reduced, and the occurrence of the increase in the surface tension due to the temperature rise of the cutting tool 10 during cutting can be further reduced.

[0051] In some optional embodiments of the present application, the mass fraction of the first fluorine-containing polymer in the coating layer is 20-30%, and the mass fraction of the second fluorine-containing polymer in the coating layer is 10-15%, based on 100% of the mass fraction of the coating layer.

[0052] In addition, in the embodiments of the present application, other additives can also be included in the coating, through which the performance of the coating in various aspects can be enhanced, such as wear resistance, high temperature resistance, etc.

[0053] In some alternative embodiments of the present application, the coating further comprises inorganic wear-resistant particles. By adding the inorganic wear-resistant particles, the wear resistance of the coating can be enhanced, thereby prolonging the service life of the tool.

[0054] In some alternative embodiments of the present application, the inorganic wear-resistant particles comprise metal oxide particles. Further, the metal oxide particles comprise zinc oxide particles, aluminum oxide particles, etc. In some alternative embodiments of the present application, the inorganic wear-resistant particles can also comprise non-metal oxide particles, such as silicon dioxide particles.

[0055] In a second aspect, the embodiments of the present application further provide a manufacturing method of a tool as described in the first aspect of the present application, the tool comprising a tool body and at least one cutting edge, the cutting edge being located on one side of the tool body in the width direction, the manufacturing method comprising:

[0056] applying a raw material containing the first fluorine-containing polymer and the second fluorine-containing polymer to the surface of the tool body to form a coating.

[0057] In the above embodiments, the application method can be a coating or vapor deposition method, and the embodiments of the present application are not specifically limited.

[0058] In a third aspect, the embodiments of the present application further provide a cutting device comprising the tool of the first aspect of the present application and / or the tool manufactured by the manufacturing method of the second aspect of the present application.

[0059] In the above embodiments, the cutting device can be a wood cutting machine, a wood planer, a wood drilling machine, a woodworking machine tool, etc.

[0060] The embodiments described below are part of the embodiments of the present application, but not all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but only represents specific embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without departing from the principles of the present application and without making creative efforts, are within the scope of protection of the present application.

[0061] Embodiment 1

[0062] The present embodiment provides a manufacturing method of a tool, comprising the following steps:

[0063] 5g of perfluorinated polyamide and 2g of perfluorinated polyether are dissolved in 13g of perfluorinated tripropylamine solvent to form a coating slurry, wherein the glass transition temperature of the perfluorinated polyamide is higher than the glass transition temperature of the perfluorinated polyether;

[0064] The coating slurry is uniformly applied to the blade body of the tool to form a slurry layer, and is dried in a vacuum drying box to form a coating, wherein the surface tension A of the coating at 25°C is 30 mN / m, the surface tension B of the coating at 50°C is 35 mN / m, and the coating has a water surface contact angle of 135° measured by ASTM D7334.

[0065] Example 2

[0066] This example is similar to the manufacturing method of Example 1, except that 6 g of perfluoropolyamide and 2 g of perfluoropolyether are used, the surface tension A of the coating at 25°C is 27 mN / m, the surface tension B of the coating at 50°C is 33 mN / m, and the coating has a water surface contact angle of 145° measured by ASTM D7334.

[0067] Example 3

[0068] This example is similar to the manufacturing method of Example 1, except that 6 g of perfluoropolyamide and 4 g of perfluoropolyether are used, the surface tension A of the coating at 25°C is 32 mN / m, the surface tension B of the coating at 50°C is 40 mN / m, and the coating has a water surface contact angle of 125° measured by ASTM D7334.

[0069] Example 4

[0070] This example is similar to the manufacturing method of Example 1, except that 9 g of perfluoropolyamide and 8 g of perfluoropolyether are used, the surface tension A of the coating at 25°C is 40 mN / m, the surface tension B of the coating at 50°C is 55 mN / m, and the coating has a water surface contact angle of 155° measured by ASTM D7334.

[0071] Comparative Example 1

[0072] This comparative example is similar to the manufacturing method of Example 1, except that 7 g of perfluoropolyether are used, the surface tension A of the coating at 25°C is 41 mN / m, the surface tension B of the coating at 50°C is 63 mN / m, and the coating has a water surface contact angle of 100° measured by ASTM D7334.

[0073] Comparative Example 2

[0074] This comparative example is similar to the manufacturing method of Example 1, except that 9 g of perfluoropolyamide are used, the surface tension A of the coating at 25°C is 40 mN / m, the surface tension B of the coating at 50°C is 58 mN / m, and the coating has a water surface contact angle of 110° measured by ASTM D7334.

[0075] Test Section

[0076] (1) Surface tension test

[0077] The static surface tension of the coating at 25°C and 50°C was measured using a static surface tension meter (CBVP-Z: Kibron) using the Wilhelmy method, and the unit was mN / m. The test results are shown in Table 1.

[0078] (2) Water surface contact angle test

[0079] The test results are shown in Table 1.

[0080] (3) Resistance test

[0081] The knives manufactured in Examples 1-4 and Comparative Examples 1-2 were installed in a woodworking machine, and the same wood was cut under the same parameters in the numerical control machine. The resistance F1 of the knife at 25°C and the resistance F2 at 50°C were measured, and the resistance change rate f = (F2-F1) / F1 x 100% was calculated. The test results are shown in Table 1.

[0082] Table 1

[0083]

[0084] According to Table 1, the knife provided by the present application has a coating on the surface of the blade, and the coating comprises a first fluorine-containing polymer and a second fluorine-containing polymer. The glass transition temperature of the first fluorine-containing polymer is greater than that of the second fluorine-containing polymer. The difference (B-A) between the surface tension A of the coating at 25°C and the surface tension B of the coating at 50°C is 5-15 mN / m, and the coating has a water surface contact angle of 120-170° measured by ASTM D7334. Therefore, when the knife is used, the surface tension of the coating changes little as the cutting time increases and the surface temperature rises, and the coating also has a large water surface contact angle. This can reduce the adhesion of excess materials such as wood chips generated during cutting of wood to the surface of the knife, thereby reducing the magnitude of the increase in resistance, thereby improving the working efficiency of the knife.

[0085] Finally, it should be noted that the above experimental examples are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the above experimental examples, those skilled in the art should understand that they can modify the technical solutions described in the above experimental examples, or make equivalent substitutions for part or all of the technical features. These modifications or substitutions do not change the essence of the corresponding technical solutions from the scope of the technical solutions of the experimental examples of the present application.

Claims

1. A tool for cutting wood, characterized in that, The tool includes: a tool body; at least one cutting edge located on one side of the tool body in the width direction; a coating layer provided on the surface of the tool body, the coating layer comprising a first fluoropolymer and a second fluoropolymer, the first fluoropolymer being a perfluoropolyamide, and the second fluoropolymer being a perfluoropolyether; the mass ratio of the first fluoropolymer to the second fluoropolymer being (1-3):1; wherein the glass transition temperature of the first fluoropolymer is greater than the glass transition temperature of the second fluoropolymer, the glass transition temperature of the first fluoropolymer is greater than -5°C, the glass transition temperature of the second fluoropolymer is greater than -10°C, the difference (B-A) between the surface tension A of the coating layer at 20°C and the surface tension B of the coating layer at 50°C is 5-15 mN / m, and the coating layer has a water surface contact angle of 120-170° as determined by ASTM D7334.

2. The knife of claim 1, wherein, The coating layer has a water surface contact angle of 140-160° as determined by ASTM D7334.

3. The knife of claim 1, wherein, The mass fraction of the first fluoropolymer in the coating layer is 30-60% and the mass fraction of the second fluoropolymer in the coating layer is 20-30%, based on the mass fraction of the coating layer being 100%.

4. The tool according to any one of claims 1-3, characterized in that, The coating layer further comprises inorganic wear-resistant particles.

5. The tool of claim 4 wherein, The inorganic wear-resistant particles comprise metal oxide particles.

6. A method of manufacturing a tool according to any one of claims 1-5, characterized in that, The tool includes a tool body and at least one cutting edge located on one side of the tool body in the width direction, and the manufacturing method comprises: dissolving perfluoropolyamide and perfluoropolyether in a perfluorotripropylamine solvent to form a coating slurry, wherein the glass transition temperature of the perfluoropolyamide is greater than the glass transition temperature of the perfluoropolyether; uniformly coating the coating slurry on the tool body of the tool to form a slurry layer, and drying the slurry layer in a vacuum drying oven to form a coating layer.

7. A cutting device characterized by The tool includes the tool of any one of claims 1-5 and / or the tool manufactured by the manufacturing method of claim 6.

Images