Novel PCBN cutter capable of dissipating heat automatically

Abstract

The utility model discloses a novel PCBN cutter capable of dissipating heat automatically, and relates to the technical field of PCBN cutters. The cutting tool comprises a blade and a tool handle, the blade is installed on the tool handle through a bolt, the blade comprises a base body and a plurality of tool bits, the ends, close to the base body, of the tool bits are in a wave shape, and the ends, close to the tool bits, of the base body are all fixedly provided with wave copper heat conduction pieces. The end, close to the tool bit, of the wave-shaped copper heat-conducting piece is also in a wave shape, and the wave-shaped end of the tool bit is fixedly matched with the wave-shaped end of the wave-shaped copper heat-conducting piece. The end, close to the base body, of the tool bit is wavy and is fixedly matched with the wavy copper heat-conducting fin which is also wavy, the wavy structure increases the contact area, heat generated by the tool bit can be conducted to the wavy copper heat-conducting fin, the heat is conducted into the base body through the wavy copper heat-conducting fin, and therefore the heat on the tool bit is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to PCBN cutter technical field, concretely, especially relates to a novel PCBN cutter of self -cooling. BACKGROUND

[0002] In the metal processing field, PCBN (polycrystalline cubic boron nitride) cutter has been widely used owing to its high hardness, wear resistance and the characteristics of keeping good performance at high temperature, especially has wide application in high-precision cutting scene.

[0003] When PCBN cutter carries out cutting operation to workpiece, the violent friction between blade and workpiece can produce a large amount of heat, and if these heat cannot be promptly and effectively dissipated, the temperature of blade will rise sharply, and the excessively high temperature will not only make the hardness and wear resistance of blade decline, accelerate the wear of blade, shorten the service life of blade, greatly increase processing cost, but also cause blade thermal deformation, influence processing precision, make the size deviation and surface roughness of processed workpiece increase, cannot satisfy the processing requirement of high precision.

[0004] For the problems in the related art, no effective solution has been proposed so far. CONTENT OF THE UTILITY MODEL

[0005] For the problems in the related art, the utility model provides a novel PCBN cutter of self -cooling to overcome the above technical problems existing in the prior art.

[0006] To solve the above technical problems, the utility model is realized by the following technical schemes:

[0007] The utility model is a novel PCBN cutter of self -cooling, including blade and handle, the blade is installed on the handle through bolt, the blade includes base body and multiple tool bits, the end close to the base body of multiple tool bits is wavy, the end close to multiple tool bits of the base body is fixedly provided with wavy copper heat conduction sheet, the end close to the tool bit of the wavy copper heat conduction sheet is also wavy, and the wavy end of the tool bit is fixedly matched with the wavy end of the wavy copper heat conduction sheet.

[0008] The base body is provided with circular heat dissipation hole in one side of multiple wavy copper heat conduction sheets, the inner wall of the circular heat dissipation hole is symmetrically provided with thermal expansion aluminum, and the inner wall of the circular heat dissipation hole and between two thermal expansion aluminums are provided with multiple heat dissipation fins, and the handle and the base body contact surface are fixedly provided with heat conduction copper sheet.

[0009] Further, the side surface of the tool bit is surrounded by the first cutting edge, the second cutting edge and the wavy surface, and the acute angle between the first cutting edge and the second cutting edge is °.

[0010] Further, the base body is provided with a mounting positioning hole, and the top end of the mounting positioning hole is inversely beveled.

[0011] Further, the two ends of the circular heat dissipation hole are inversely beveled.

[0012] Further, the two thermal expansion aluminums divide the circular heat dissipation hole into two rapid air inlet zones and an air flow buffering zone.

[0013] Further, a plurality of heat dissipation fins are arranged in the air flow buffering zone of the circular heat dissipation hole.

[0014] Further, the two ends of the thermal expansion aluminum are inversely beveled, and the size of the cavity on the two sides of the circular heat dissipation hole is changed by the thermal expansion of the two thermal expansion aluminums, so that the gas flow rate entering the circular heat dissipation hole is changed.

[0015] The utility model has the following beneficial effects:

[0016] The end of the tool head close to the base body is wavy, and is fixedly connected with the wavy copper heat conduction fin which is also wavy. The wavy structure increases the contact area, and can conduct the heat generated by the tool head to the wavy copper heat conduction fin, and then conduct the heat to the base body through the wavy copper heat conduction fin, so as to reduce the heat on the tool head.

[0017] The plurality of heat dissipation fins arranged in the circular heat dissipation hole and between the two thermal expansion aluminums increase the heat dissipation area. When the air enters from one end of the circular heat dissipation hole at a high speed, the air contacts the plurality of heat dissipation fins and the inner wall of the circular heat dissipation hole, and carries away the heat on the plurality of heat dissipation fins, and then flows through the other thermal expansion aluminum at a high speed, so as to accelerate the heat dissipation. The heat conduction copper fin fixedly arranged on the contact surface between the handle and the base body can conduct part of the heat on the base body to the handle, and then further dissipate the heat through the handle, so as to improve the overall heat dissipation efficiency of the blade.

[0018] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages mentioned above. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is a three-dimensional structure diagram of the utility model;

[0021] Figure 2 It is a whole blade schematic diagram of the utility model;

[0022] Figure 3 The exploded view of the blade of the utility model;

[0023] Figure 4 The partial sectional view of the base body of the utility model.

[0024] In the drawings, the components represented by each reference numeral are listed as follows:

[0025] 1, blade; 101, base body; 1011, positioning hole; 102, tool bit; 1021, first cutting edge; 1022, second cutting edge; 103, wave-shaped copper heat-conducting sheet; 104, circular heat dissipation hole; 105, heat-expanding aluminum; 106, heat dissipation sheet; 2, handle; 201, heat-conducting copper sheet. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] In the description of the utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the utility model.

[0028] Please refer to Figures 1-4 As shown in the figure, the utility model is a novel PCBN tool capable of self-heat dissipation, which comprises a blade 1 and a handle 2. The blade 1 is installed on the handle 2 through bolts. The blade 1 comprises a base body 101 and a plurality of tool bits 102. The plurality of tool bits 102 are wave-shaped near one end of the base body 101. The base body 101 is fixedly provided with wave-shaped copper heat-conducting sheets 103 near one end of the plurality of tool bits 102. The wave-shaped copper heat-conducting sheets 103 are also wave-shaped near the end of the tool bits 102. The wave-shaped end of the tool bits 102 is fixedly matched with the wave-shaped end of the wave-shaped copper heat-conducting sheets 103.

[0029] The base body 101 is provided with a circular heat dissipation hole 104 on one side of the plurality of wave-shaped copper heat conducting sheets 103, the inner wall of the circular heat dissipation hole 104 is symmetrically provided with thermal expansion aluminum 105, and the inner wall of the circular heat dissipation hole 104 between the two thermal expansion aluminum 105 is provided with a plurality of heat dissipation fins 106, the contact surface of the shank 2 and the base body 101 is fixedly provided with a heat conducting copper sheet 201, and the two ends of the circular heat dissipation hole 104 are in inverted bevel shape.

[0030] The shank 2 is used for being installed to the clamp of the corresponding cutting machine tool, when the cutting tool performs cutting operation, the cutter head 102 is in contact with the workpiece and generates friction, and then generates a large amount of heat, since the one end of the cutter head 102 close to the base body 101 is in wave shape and is fixedly matched with the wave-shaped copper heat conducting sheet 103, the wave-shaped structure increases the contact area, and the heat generated by the cutter head 102 can be conducted to the wave-shaped copper heat conducting sheet 103, and then the heat is conducted to the base body 101 through the wave-shaped copper heat conducting sheet 103, so as to reduce the heat on the cutter head 102, the circular heat dissipation hole 104 in the base body 101, and the thermal expansion aluminum 105 symmetrically arranged on the inner wall of the circular heat dissipation hole 104 has the characteristic of thermal expansion, it is important to note that when the thermal expansion aluminum increases in temperature, the internal atom activity intensifies, the atomic spacing increases, and the overall volume expands, the circular thermal expansion aluminum is arranged on the inner wall of the circular heat dissipation hole 104, since the outer ring thereof is fixed with the inner wall of the circular heat dissipation hole, when heated, the expansion direction will be limited, and therefore the thermal expansion aluminum will preferentially expand to the inner ring direction, in the cutting process of the cutting tool, with the heat generated by the cutter head 102 being conducted to the base body 101 and the surrounding of the circular heat dissipation hole 104, the thermal expansion aluminum 105 absorbs heat and increases in temperature, and then thermal expansion occurs, so that the size of the cavity of the circular heat dissipation hole 104 changes.

[0031] At the same time, when the cutting tool 1 performs cutting on the workpiece, the shank 2 drives the cutting tool 1 to move, so that air enters the circular heat dissipation hole 104, and the rotation of the workpiece itself promotes the flow of the surrounding air, and also enables the air to enter the circular heat dissipation hole 104, and after the thermal expansion aluminum 105 changes the size of the cavity of the circular heat dissipation hole 104 by thermal expansion, the flow rate of the air entering the circular heat dissipation hole 104 can be changed, when the temperature is relatively low and the thermal expansion aluminum 105 expands to a small degree, the cavity of the circular heat dissipation hole 104 is relatively large, and the flow rate of the air entering is relatively slow; when the temperature increases and the thermal expansion aluminum 105 expands to a large degree, the cavity of the circular heat dissipation hole 104 becomes small, and the flow rate of the air entering is accelerated, so as to improve the heat dissipation efficiency, for the above description, the air flow entering in unit time is certain, when the thermal expansion aluminum 105 changes the size of the cavity of the circular heat dissipation hole 104 by thermal expansion, the same flow of air needs to pass through the channel with smaller cross-sectional area, according to the formula v=Q / A (wherein v is the flow rate, Q is the flow, and A is the cross-sectional area of the channel), that is, the cross-sectional area A decreases, and the flow rate v increases, and vice versa, when the cavity becomes large, the flow rate of the air slows down, but does not cause the circular heat dissipation hole 104 to be completely blocked.

[0032] In addition, a plurality of fins 106 are arranged on the inner wall of the circular heat dissipation hole 104 between the two thermal expansion aluminums 105, which increase the heat dissipation area. When air enters from one end of the circular heat dissipation hole 104 at high speed, the air contacts the plurality of fins 106 and the inner wall of the circular heat dissipation hole 104, and carries away the heat on the plurality of fins 106, and then flows through the other thermal expansion aluminum 105 at high speed again, so as to accelerate the heat dissipation. The heat-conducting copper sheet 201 arranged on the contact surface between the shank 2 and the base 101 can conduct part of the heat on the base 101 to the shank 2, and further dissipate the heat through the shank 2, thereby improving the overall heat dissipation efficiency of the blade 1. The two ends of the circular heat dissipation hole 104 are both inverted bevels, which helps the air to enter the circular heat dissipation hole 104, so that the hot air can enter more smoothly.

[0033] It should be noted that the wave-shaped copper heat-conducting sheet 103, the fin 106 and the heat-conducting copper sheet 201 are preferably made of copper, which has good heat conductivity, is easy to obtain and has low cost. The thermal expansion aluminum 105 is preferably made of an aluminum metal material with a relatively large thermal expansion coefficient, and aluminum is easy to obtain and has relatively low cost.

[0034] In one embodiment, for the above-mentioned tool bit 102, the side surface of the tool bit 102 is surrounded by a first cutting edge 1021, a second cutting edge 1022 and a wave-shaped surface. The acute angle between the first cutting edge 1021 and the second cutting edge 1022 is 60°.

[0035] The base 101 is provided with a mounting positioning hole 1011, and the top end of the mounting positioning hole 1011 is inverted bevel.

[0036] The two thermal expansion aluminums 105 divide the circular heat dissipation hole 104 into two rapid air inlet areas and an air flow buffer area, and the plurality of fins 106 are located in the air flow buffer area of the circular heat dissipation hole 104.

[0037] The two ends of the thermal expansion aluminum 105 are both inclined, and the size of the cavity openings on both sides of the circular heat dissipation hole 104 changes by thermal expansion of the two thermal expansion aluminums 105, so as to change the flow rate of the gas entering the circular heat dissipation hole 104.

[0038] The installation positioning hole 1011 is arranged in the base body 101, a bolt passes through the installation positioning hole 1011 to install the blade 1 to the handle 2, the inverted bevel design of the top end of the installation positioning hole 1011 facilitates the tool installation process, and the installation operation is more smooth, when the workpiece is cut, air enters the circular heat dissipation hole 104 in the base body 101, the two thermal expansion aluminums 105 symmetrically arranged on the inner wall of the circular heat dissipation hole 104 divide the circular heat dissipation hole 104 into two rapid air inlet areas and an air flow buffer area, under the thermal expansion characteristics of the thermal expansion aluminums 105, air can quickly enter the circular heat dissipation hole 104, and the heat dissipation source is provided, the two ends of the thermal expansion aluminums 105 are inclined, air resistance when passing through the thermal expansion aluminums 105 can be reduced, and the plurality of heat dissipation fins 106 are located in the air flow buffer area of the circular heat dissipation hole 104, when the air quickly entering the circular heat dissipation hole 104 enters the air flow buffer area, the flow rate is relatively stable, and the air is in contact with the heat dissipation fins 106 and the inner wall of the circular heat dissipation hole 104, so that the heat in the base body 101 is transmitted to the air, and the air with high heat is pushed into the circular heat dissipation hole 104, and then discharged through another rapid air inlet area, and then the flow rate of the air is accelerated, and the heat dissipation of the base body 101 is increased.

[0039] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details, and the utility model is limited to the specific embodiments described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the person skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A novel self-heat-dissipating PCBN tool bit, comprising a blade (1) and a handle (2), the blade (1) being bolted on the handle (2), the blade (1) comprising a base body (101) and a plurality of tool heads (102), characterized in that: Multiple said cutter head (102) near the end of the base body (101) is wavy, the base body (101) near multiple said cutter head (102) end is fixedly provided with wave copper heat conduction sheet (103), the wave copper heat conduction sheet (103) near the end of the cutter head (102) is also wavy, the cutter head (102) wavy end and the wave copper heat conduction sheet (103) wavy end fixedly cooperate; The base body (101) is provided with a circular heat dissipation hole (104) on one side of the wave copper heat conduction sheet (103), the inner wall of the circular heat dissipation hole (104) is symmetrically provided with a thermal expansion aluminum (105), and the inner wall of the circular heat dissipation hole (104) is provided with a plurality of heat dissipation fins (106) between the two thermal expansion aluminums (105), and the contact surface of the shank (2) and the base body (101) is fixedly provided with a heat-conducting copper sheet (201).

2. A novel PCBN cutting tool capable of self-heat dissipation according to claim 1, characterized in that, The side surface of the cutter head (102) is surrounded by a first cutting edge (1021), a second cutting edge (1022) and a wavy surface, the first cutting edge (1021) and the second cutting edge (1022) form a sharp angle of 60°.

3. A novel PCBN cutting tool capable of self-heat dissipation according to claim 1, characterized in that, The base body (101) is provided with a mounting positioning hole (1011), and the top end of the mounting positioning hole (1011) is inclined.

4. A novel PCBN cutting tool capable of self-heat dissipation according to claim 1, characterized in that, Both ends of the circular heat dissipation hole (104) are inclined.

5. A novel PCBN cutting tool capable of self-heat dissipation according to claim 1, characterized in that, Two said thermal expansion aluminums (105) divide the circular heat dissipation hole (104) into two rapid air inlet areas and an air flow buffer area.

6. A novel PCBN cutting tool capable of self-heat dissipation according to claim 1, characterized in that, Multiple said heat dissipation fins (106) are located in the air flow buffer area of the circular heat dissipation hole (104).

7. A novel PCBN cutting tool capable of self-heat dissipation according to claim 1, characterized in that, Both ends of the thermal expansion aluminum (105) are inclined, and the size of the cavity on both sides of the circular heat dissipation hole (104) is changed by the thermal expansion of the two thermal expansion aluminums (105), so as to change the gas flow rate into the circular heat dissipation hole (104).

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