CN115971520A - Cutting blade and cutter - Google Patents
Cutting blade and cutter Download PDFInfo
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- CN115971520A CN115971520A CN202211448896.0A CN202211448896A CN115971520A CN 115971520 A CN115971520 A CN 115971520A CN 202211448896 A CN202211448896 A CN 202211448896A CN 115971520 A CN115971520 A CN 115971520A
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Abstract
The present application relates to the field of cutting tools, and more particularly, to a cutting insert and a cutting tool. The cutting blade comprises a base body part and a cutting part connected with the base body part; the cutting part comprises a front cutter surface, a rear cutter surface connected with the front cutter surface and two side rear cutter surfaces used for connecting the front cutter surface and the rear cutter surface; a cutting edge is formed at the intersection of the front cutter face and the rear cutter face; a chip groove is arranged on the front cutter face, a central front angle surface is arranged on the chip groove in the direction close to the cutting edge, a positive front angle is formed between the central front angle surface and the horizontal plane, and the width of the central front angle surface is smaller than that of the cutting edge; the rake face is provided with a negative chamfer face at the intersection with the flank face, the negative chamfer face comprising a narrow negative rake face formed by extending the central rake face to the cutting edge and a widened negative rake face formed by extending the narrow negative rake face in the direction of the flank face. The application provides a cutting insert suitable for high-speed feed cut-off grooving processing, and the cutting insert can realize stable and high-efficient processing under the high-speed feed operating mode.
Description
Technical Field
The present application relates to the field of cutting tools, and more particularly, to a cutting insert and a cutting tool.
Background
The cutting blade is used as a common cutting tool in industry, and the cutting and grooving operation is a common operation of the cutting blade and is widely applied to the machining of parts in industries such as general machinery, automobiles, small parts and the like. Under the working condition of cutting off the grooving by high-speed feeding, because the cutting blade needs to keep higher feeding and is inserted into a rotating workpiece for cutting processing, for the processing of the type, in order to ensure the surface smoothness of the processed workpiece and avoid scratches and chatter marks, the cutting blade has higher requirements on the cutting edge strength, the curling chips, the breaking chips and the chip removal of the cutting blade. Meanwhile, when the cutting blade is cut off and machined, the cutting blade is deep into the workpiece, the cutting heat is difficult to discharge, the condition is more prominent under the working condition of high-speed feeding, the performance of the workpiece material can be changed by high cutting temperature, the generation and disappearance of accumulated chip lumps on the cutting blade are influenced, the surface quality and the machining precision of the machined workpiece are directly influenced, and the influence on the service life and the machining stability of the cutting blade is larger.
At present, aiming at the processing difficulty of radial cutting and grooving, manufacturers on the market adopt a linear cutting edge or an arc cutting edge to combine with respective chip breaking groove type for coping, and the side emphasis is on ensuring the strength and chip rolling effect of the cutting edge; however, in the case of high-speed feeding machining, the thickness of chips is large, the cutting force is large, and the amount of heat generated by cutting is large, and it is difficult for the conventional grooving blade to satisfy the requirements of strength of the cutting edge, heat dissipation, chip curling, and the like in the case of high-speed feeding machining.
Disclosure of Invention
To solve the deficiencies of the prior art mentioned in the background above: when the existing cutting blade is used for cutting off and grooving at high speed, the defects of insufficient strength, slow heat dissipation and the like of the cutting edge exist, and especially under the working condition of high-speed feeding, the existing cutting blade is difficult to meet the requirements of the strength, the heat dissipation, the chip formation and the like of the cutting edge. The application provides a cutting blade and cutter, aims at solving the not enough of above-mentioned current scheme, and its technical scheme is as follows:
in one aspect, the present application provides a cutting insert comprising a base portion and a cutting portion connected to the base portion; the cutting part comprises a front cutter surface, a rear cutter surface connected with the front cutter surface and two side rear cutter surfaces used for connecting the front cutter surface and the rear cutter surface; wherein a cutting edge is formed at the intersection of the rake face and the flank face; a chip groove is arranged on the front cutter face, a central front angle surface is arranged in the direction of the chip groove close to the cutting edge, a positive front angle is formed between the central front angle surface and the horizontal plane, and the width of the central front angle surface is smaller than that of the cutting edge; the rake face is equipped with negative chamfer face on its crossing position with the back knife face, negative chamfer face include by central rake face extends to the narrow negative rake face that the cutting edge formed and by narrow negative rake face towards the negative rake face of broadening that the side back knife face direction extended the formation, the cutting edge include by narrow negative rake face with the preceding narrow sub-sword that the back knife face meets and is formed and by negative rake face of broadening broadens negative rake face with the preceding wide sub-sword that the back knife face meets and forms.
In one embodiment, the length L of the widened negative rake face 2 Width W of the cutting edge c Has a relation of L 2 ＝W C 10+ lambda, said lambda being greater than or equal to 0.1mm.
In one embodiment, the width W of the front narrow sub-blade z Greater than or equal to 0.3W C And less than or equal to 0.8W C 。
In one embodiment, the length L of the narrow negative rake face 1 Greater than or equal to 0.05mm and less than or equal to 0.18mm; and/or, the length L of the widened negative rake face 2 Greater than or equal to 0.3mm and less than or equal to 1.0mm.
In one embodiment, the included angle between the negative chamfer and the horizontal plane is epsilon, and epsilon is more than or equal to 5 degrees and less than or equal to 15 degrees; and/or the included angle between the central front angle surface and the horizontal plane is delta, and the delta is larger than or equal to 15 degrees and smaller than or equal to 30 degrees.
In one embodiment, the chip flutes are respectively provided with a first chip coiling inclined surface in the direction close to the side rear cutter surface; the first chip forming inclined surface is connected to the central rake surface and the widened negative rake surface, and the first chip forming inclined surface gradually reduces the width of the chip pocket along a direction from the rake surface to the bottom of the chip pocket.
In one embodiment, a second chip-rolling inclined surface and a connecting arm are further arranged on the chip pocket in the direction close to the side rear cutter face; the second chip rolling inclined plane and the connecting arm are connected to the first chip rolling inclined plane, and the connecting arm is located between the second chip rolling inclined plane and a chip reflecting plane at the bottom of the chip groove.
In one embodiment, the rake face is provided with a side reinforcing arm at the intersection with the side relief face; the side reinforcing arm is connected with the second scrap rolling inclined surface, one side of the side reinforcing arm is connected with the widened negative front angle surface, the other side of the side reinforcing arm extends towards the direction of the base body, and the middle position of the side reinforcing arm is inwards sunken to form an arc-shaped surface structure.
In one embodiment, an included angle between two first chip winding inclined surfaces is α, an included angle between two second chip winding inclined surfaces is β, β is greater than or equal to α, an included angle between the connecting arm and the chip reflecting surface is γ, and a value of 180 ° -2 γ is smaller than α; said a is greater than or equal to 140 ° and less than or equal to 160 °; β is greater than or equal to 160 ° and less than or equal to 170 °; the γ is greater than or equal to 30 ° and less than or equal to 60 °.
Based on the above, compared with the prior art, the cutting insert provided by the application at least comprises the following technical effects:
the cutting blade of the application utilizes the narrow negative front angle surface and the widened negative front angle surface of the negative inverted-edge surface at the position of the tool nose to form a front narrow sub-edge and a front wide sub-edge at the position of the cutting edge of the cutting blade, and in the cutting process of the cutting blade, the structure can generate inward extrusion pressure on a cutting flow pattern because the contact length of the middle position and the two side positions of the cutting edge is changed, so that the cutting chips are curled, and the chip coiling effect of the cutting blade is improved; meanwhile, due to the existence of the widened negative front angle surface and the narrow negative front angle surface of the negative chamfered surface, on one hand, the front narrow sub-blade, the front wide sub-blade and a workpiece can be subjected to surface blade stress, the stress on the unit area of the cutting blade is reduced, the tool tip strength of the cutting blade under the high-speed feeding condition is effectively improved, and the cutting blade can have a larger heat dissipation area so as to improve the heat dissipation efficiency; on the other hand, the narrow negative rake face and the central rake face with the positive rake angle can obviously improve the sharpness of the front narrow sub-edge at the middle position of the cutting edge, and can effectively reduce the cutting resistance under the working condition of high-speed feeding, thereby improving the cutting efficiency of the cutting blade.
In another aspect, the present application also provides a cutting tool comprising a tool body and a cutting insert as described above mounted on the tool body.
Based on the foregoing, compared with the prior art, the cutting tool provided by the application at least comprises the following technical effects: the cutter of this application utilizes the cutter body to rotate the cutting that drives the cutting blade through installing foretell cutting blade on the cutter body, and the cutter of this application has the technological effect of above-mentioned cutting blade, and the no longer gives unnecessary details here.
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts; in the following description, the drawings are illustrated in a schematic view, and the drawings are not intended to limit the present invention.
Fig. 1 is a perspective view of a cutting insert according to an embodiment of the present disclosure;
fig. 2 is a partial perspective view of a cutting insert according to an embodiment of the present invention;
fig. 3 is a partial perspective view of a cutting insert according to an embodiment of the present invention;
fig. 4 is a schematic partial perspective view of a cutting insert according to an embodiment of the present application;
FIG. 5 shows a cutting insert edge D provided in accordance with an embodiment of the present application D A projected view of the direction;
FIG. 6 shows a cutting insert edge D provided in an embodiment of the present application B A projection view of the direction;
FIG. 7 is a first enlarged view of a portion of FIG. 5 at cutting site E;
FIG. 8 is a second enlarged view of a portion of FIG. 5 at cutting site E;
FIG. 9 is a cross-sectional view taken along line B-B of FIG. 5;
FIG. 10 is a cross-sectional view taken along line C-C of FIG. 5;
FIG. 11 shows an embodiment of the present application with a cutting insert along line D R A partial sectional view of the directional projection;
FIG. 12 is an enlarged partial view of FIG. 11 at A;
FIG. 13 is an enlarged partial view at B of FIG. 11;
fig. 14 is a schematic view of a cutting insert clamped to a tool body for machining a workpiece, according to an exemplary embodiment of the present application.
Reference numerals:
10 cutting insert 20 cutter body for machining workpiece 30
100 cutting part 200 base part
210 blade upper locating surface 220 blade lower locating surface 230 blade side support surface
110 rake surface 120 front support surface 130 side
140 chip flute 150 cutting edge 111 negative chamfer surface
112 narrow negative rake face 1112 of side reinforcement arm 1111 widens the negative rake face
131 side flank 132 side sub-blade 133 knife tip arc
141 central front corner face 142 first chip-forming inclined face 143 second chip-forming inclined face
144 connecting arm 145 chip-removing surface 121 flank
151 front narrow sub-edge 152 front wide sub-edge
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments; the technical features designed in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be noted that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, and are not to be construed as limiting the present application; it will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Referring to fig. 1-3, taking the cutting portion 100 (the cutting portion 100 circled in fig. 1) at one end of the cutting insert 10 as an example, the direction in which the cutting insert 1 moves toward the machined workpiece 20 is defined as the cutting direction D c， I.e. the flank face of one of the cutting parts 100 facing the cutting part 100121 in the direction of the axis; the direction opposite to the cutting direction is a backward direction D B ，D c And D B The directions are opposite; and the left side direction of the cutting part 100 is defined as D L And the right side direction is D R (ii) a The direction in which the cutting insert 10 is directed toward the insert upper locating surface 210 along the insert lower locating surface 220 is defined as an upward direction D U ，D U Is the downward direction D D 。
As shown in fig. 2-4, the rake surface 110 of the cutting portion 100 is located on the upper surface of the cutting portion 100 (i.e., along D) U The outermost surface in the direction), and the flank surface 121 is located at the front surface (i.e., along D) of the cutting portion 100 c The outermost surface of the direction). Those skilled in the art of cutting tools will generally refer to the two faces adjacent to either side of the cutting edge 150 as the rake face 110 and the relief face 121, as is commonly known in the art and will not be described again here.
It should be noted that, the cutting direction is defined as the direction of the cutting portion 100 of the cutting insert 10 moving toward the machined workpiece 20, the definition of the cutting insert 10 in each direction is based on the cutting direction, and other directions are only defined for the convenience of understanding and are identified according to the drawings of the embodiments, and the terms "upward", "downward", "left" and "right" are used only according to the present illustration and are not limited or restricted; it is well known that the cutting insert 10 can also be used upside down, and the description of the up, down, left, and right directions changes after being used upside down.
At present, in the face of the difficulty in cutting and grooving, manufacturers on the market adopt a linear cutting edge or an arc cutting edge to combine with respective chip breaking groove type for coping, and the side emphasis is on ensuring the strength and chip rolling effect of the cutting edge; however, in the case of high-speed machining, the thickness of chips is large, the cutting force is large, and the amount of heat generated by cutting is large. The existing traditional cutting blade is difficult to meet the requirements of strength, heat dissipation, chip curling and the like of the cutting edge under the high-speed feeding processing condition.
Accordingly, the present embodiments provide a cutting insert 10 that addresses high feed speeds to meet the machining requirements of such conditions:
the present application provides a tool as shown in the embodiment of fig. 14, which includes a tool body 30 and a cutting insert 10 for cutting a workpiece 20, the cutting insert 10 being mounted on the tool body 30. Wherein, the cutting tool is provided with the cutting blade 10 mounted on the tool body 30, and the tool body 30 is rotated to drive the cutting blade 10 to cut.
The present embodiments improve upon the cutting insert 10 therein:
the present embodiment provides a cutting insert 10 as shown in the embodiment of fig. 1-3, the cutting insert 10 comprising a base portion 200 and a cutting portion 100 connected to the base portion 200; as shown in fig. 1 to 3 and 5 to 6, in the present embodiment, the base portion 200 includes an upper insert positioning surface 210, a lower insert positioning surface 220, and two lower insert side supporting surfaces 230 connecting the upper insert positioning surface 210 and the lower insert positioning surface 220, and the cutting portion 100 is connected to an end of the base portion 200. The cutting portion 100 includes a rake surface 110, a flank surface 121 connecting the rake surface 110, and two side flank surfaces 131 for connecting the rake surface 110 and the flank surface 121; wherein, a cutting edge 150 is formed at the intersection of the rake face 110 and the flank face 121; the rake face 110 is provided with chip flutes 140.
To solve the above-mentioned disadvantages of the conventional cutting insert, the embodiment of the present application is innovatively designed to improve the cutting portion 100: referring to fig. 3 and 4, a central rake surface 141 is provided in the direction of the chip flute 140 close to the cutting edge 150, the central rake surface 141 forming a positive rake angle with the horizontal plane, wherein the width of the central rake surface 141 is smaller than the width of the cutting edge 150; the rake surface 110 is provided with a negative chamfer surface 111 at a position where the rake surface intersects with the flank surface 121, the negative chamfer surface 111 includes a narrow negative rake surface 1111 formed by extending from the central rake surface 141 to the cutting edge 150 and an extended negative rake surface 1112 formed by extending from the narrow negative rake surface 1111 in the direction of the flank surface 131, the cutting edge 150 includes a narrow rake sub-edge 151 formed by connecting the narrow negative rake surface 1111 to the flank surface 121 and a wide rake sub-edge 152 formed by connecting the extended negative rake surface 1112 to the flank surface 121.
When the cutting insert 10 of the present embodiment is mounted to the body 30 of the tool for use, the cutting portion 100 is along the cutting direction D c To process the workpiece 20The specific action process and principle are as follows:
as shown in fig. 2-4 and 11-13, the cutting edge portion, i.e., the cutting edge 150, of the cutting insert 10 provided in the embodiment of the present application is a special negative chamfer surface 111, and the middle portion of the negative chamfer surface 111 is connected to the central rake surface 141, which forms a positive rake angle with the horizontal plane, so that the negative chamfer surface 111 is represented as a narrow negative rake surface 1111 at the middle portion, and the narrow negative rake surface 1111 extends and widens towards the side flank surface 131 to form a widened negative rake surface 1112, thereby forming a narrow front sub-edge 151 and a wide front sub-edge 152 at the cutting edge 150 of the cutting insert 10; on one hand, during the cutting process of the cutting insert 10, the contact length between the middle position and the two side positions of the cutting edge 150 is changed, so that an inward pressing pressure is generated on the cutting flow pattern, the chips are curled, and the chip coiling effect of the cutting insert 10 is improved.
Moreover, the central rake face 141 forms a positive rake angle with the horizontal plane, and through the extrusion of the cutting edge and the special chip forming structure formed by the negative chamfer face 111 and the central rake face 141, the central rake face 141 cooperates with the narrow front sub-edge 151 and the wide front sub-edge 152, and the generated chips roll toward the middle and enter the central rake face 141 and the chip pocket 140 in sequence, thereby improving the chip rolling and chip discharging effects of the cutting insert 10.
Meanwhile, due to the existence of the widened negative rake angle surface 1112 and the narrowed negative rake angle surface 1111 of the negative chamfer surface 111, the stress on the cutting edge 150 is reduced by changing the stress on the cutting edge 150 from the linear edge stress to the surface edge stress, so that the tip strength of the cutting insert 10 under the high-speed feeding condition is effectively improved, and the cutting edge 150 has a larger heat dissipation area to improve the heat dissipation efficiency.
On the other hand, the narrow negative rake surface 1111 faces in the rear direction D B Extends and is connected with the central front corner face 141, and the central front corner face 141 and the horizontal plane form a positive front corner; the narrow negative rake surface 1111 and the central rake surface 141 form a cutting edge structure which is sharper than the side widening negative rake surface 1112, the sharpness of the front narrow sub-edge 151 at the middle position of the cutting edge 150 is improved, the cutting force can be effectively reduced under the high-feed working condition, and the cutting strength of the cutting edge is improvedAnd the cutting efficiency is improved.
It should be noted that the narrow negative rake surface 1111 and the widened negative rake surface 1112 of the present embodiment are opposite in width and width, i.e., the narrow negative rake surface 1111 is at D B The dimension in the direction is smaller than the widening negative rake face 1112.
Optionally, the length L of the negative rake face 1112 is widened 2 Width W of cutting edge 150 c Has a relation of L 2 ＝W C A/10 + lambda, lambda being greater than or equal to 0.1mm, lambda having a theoretical upper limit of the width W of the cutting edge 150 C . In a specific application, the value of λ can be set between 0.1mm and 0.3 mm.
So designed, the length L of the widened negative rake surface 1112 is controlled 2 Within the above range, on the one hand, the cutting edge 150 of the cutting insert 10 can be ensured to have sufficient strength, and on the other hand, the cutting insert 10 can be ensured to achieve stable and reasonable chip curling within a reasonable machining feed range; for the specific values of the above parameters, those skilled in the art can adjust the values according to the actual requirements and the processing targets through the above formulas, and the present invention is not limited herein.
Illustratively, in this embodiment, the length L of the narrow negative rake surface 1111 1 Greater than or equal to 0.05mm and less than or equal to 0.18mm; illustratively, the length L of the widened negative rake surface 1112 2 Greater than or equal to 0.3mm and less than or equal to 1.0mm.
It should be noted that: as shown in fig. 8, herein in the cutting direction D c Or D B The direction of the straight line is taken as the direction of the measured length, and D is taken as R Or D L The straight direction is taken as the direction for measuring the width.
Therein, the length L of the negative rake face 1112 is herein widened 2 Is defined as: in the cutting direction D c Or D B In the linear direction as the measured length direction, and the negative rake face 1112 is widened by D D In the directional projection, the side of the widened negative rake surface 1112 on the side closer to the flank 121 (i.e., the widened sub-edge 152) and the side of the widened negative rake surface 1112 on the side closer to the rake surface 110 (i.e., the edge of the widened negative rake surface 1112 on the side closer to the rake surface 110, in the present embodimentIn this example, the intersection of the negative rake surface 1112 and the side reinforcement arm 112).
Length L of narrow negative rake surface 1111 1 Is defined as: the distance between the side of the narrow negative rake surface 1111 on the side closer to the flank surface 121 (i.e., the leading narrow sub-edge 151) and the side of the narrow negative rake surface 1111 on the side closer to the central rake surface 141 (i.e., the intersection of the narrow negative rake surface 1111 and the central rake surface 141).
Width W of cutting edge 150 c Is defined as follows: with D R Or D L In the linear direction as the width direction, the cutting edge 150 is in D D The distance between the two outermost end points of the cutting edge 150 (which can be described as the distance between the two outermost sides of the negative chamfer 111) in the direction projection.
Optionally, the width W of the front narrow sub-edge 151 z Greater than or equal to 0.3W C And less than or equal to 0.8W C 。
Because the narrow negative rake angle surface 1111 and the central rake angle surface 141 form a sharper cutting edge structure than the side widening negative rake angle surface 1112, the cutting force can be effectively reduced, the cutting strength can be improved, and the cutting efficiency can be improved under the high-feed working condition. Setting the width W of the front narrow sub-blade 151 z Greater than or equal to 0.3W C And less than or equal to 0.8W C The sufficiently long sharper edge structure can be further ensured, thereby further improving the cutting strength and efficiency of the cutting edge of the cutting insert 10 under high feed conditions. For the specific values of the above parameters, those skilled in the art can adjust the values according to the actual requirements and the processing targets through the above formulas, and the present invention is not limited herein.
Wherein the width W of the front narrow sub-blade 151 z Is defined as: with D R Or D L The linear direction is used as the direction for measuring the width, and the front narrow sub-blade 151 is pressed by D D The distance between the two end points of the front narrow sub-blade 151 (i.e. the distance between the two outermost edges of the narrow negative rake surface 1111, which may also be referred to as the distance between the two intersections of the narrow negative rake surface 1111 and the central rake surface 141) in the directional projection). Wherein, according to the width W of the front narrow sub-blade 151 z And the width of the leading wide sub-edge 152 define: cutting machineWidth W of cutting edge 150 C Is equal to the width W of the front narrow sub-edge 151 z The width of the front wide sub-blade 152 may be determined according to the width of the front narrow sub-blade 151W, together with the sum of the widths of the two front wide sub-blades 152 z And (4) obtaining.
Alternatively, as shown in fig. 12-13, the negative chamfer 111 may have an angle e with the horizontal that is greater than or equal to 5 ° and less than or equal to 15 °. Optionally, the central front angled surface 141 is angled from horizontal by δ, δ being greater than or equal to 15 ° and less than or equal to 30 °.
The narrow negative rake surface 1111 and the widened negative rake surface 1112 of the negative chamfer surface 111 form a front narrow sub-edge 151 and a front wide sub-edge 152 at the cutting edge 150, which structure causes chip curl due to a change in contact length between the middle position and both side positions of the cutting edge 150 during cutting. In addition, the extrusion of the cutting edge and the special chip forming structure formed by the negative chamfer surface 111 and the central front corner surface 141 are beneficial to improving the chip rolling and chip discharging effects of the cutting insert 10. The included angle epsilon between the negative chamfered surface 111 and the horizontal plane is set in the range, so that the chip curling can be further promoted, and the cutting blade 10 is guaranteed to have a better chip curling effect.
In cutting, due to the presence of the widened negative rake face 1112 and the narrowed negative rake face 1111 of the negative chamfer face 111, the cutting edge strength of the cutting insert 10 under high-speed feeding conditions is effectively improved, and the cutting edge 150 can have a large heat dissipation area. And the narrow negative rake surface 1111 and the central rake surface 141 both form a sharper cutting edge structure than the lateral, widened negative rake surfaces 1112, increasing the sharpness of the front narrow sub-edge 151. The included angle epsilon between the negative chamfered surface 111 and the horizontal plane and the included angle delta between the central front corner surface 141 and the horizontal plane are set in the range, so that the tip strength and the heat dissipation effect of the cutting edge 150 under the high-feed working condition can be further ensured, the cutting strength of the cutting edge is improved, and the cutting efficiency is improved.
Optionally, the chip flutes 140 are respectively provided with first chip forming slopes 142 in the direction close to the side flank surfaces 131; first chip forming chamfer 142 connects central rake face 141 and widened negative rake face 1112, respectively, and first chip forming chamfer 142 tapers the width of flute 140 in the direction from rake face 110 to the bottom of flute 140.
As shown in fig. 3-4, 7 and 9, in the cutting insert 10 according to the embodiment, when performing cutting machining, the generated chips are curled toward the middle by the squeezing of the cutting edge and the special chip forming structure formed by the negative chamfer surface 111 and the central rake surface 141, and the chips enter the first chip curling inclined surface 142 and the central rake surface 110 along the same line, and the first chip curling inclined surface 142 is designed to further curl the chips, so as to prevent the chips from scratching the surface of the machined workpiece 20, and meanwhile, the chips smoothly enter the chip pocket 140 along the central rake surface 141, so that the chip curling, chip wrapping, chip breaking and chip discharging effects of the cutting insert 10 are improved.
Optionally, the chip flute 140 is further provided with a second chip-curling slope 143 and a connecting arm 144 in the direction close to the side flank 131; the second chip forming slope 143 and the connecting arm 144 are connected to the first chip forming slope 142, and the connecting arm 144 is located between the second chip forming slope 143 and the chip-counter surface 145 at the bottom of the chip pocket 140. Alternatively, as shown in fig. 9-10, the included angle between the two first chip forming slope surfaces 142 is α, the included angle between the two second chip forming slope surfaces 143 is β, β is greater than or equal to α, the included angle between the connecting arm 144 and the chip-removing surface 145 is γ, and 180 ° -2 γ is smaller than α. Illustratively, α is greater than or equal to 140 ° and less than or equal to 160 °; β is greater than or equal to 160 ° and less than or equal to 170 °; γ is greater than or equal to 30 ° and less than or equal to 60 °.
As shown in fig. 3-4, 7 and 10, the chips pass through the first chip-forming slope 142 and then enter the positions of the second chip-forming slope 143 and the connecting arm 144, the second chip-forming slope 143 and the connecting arm 144 are connected to the first chip-forming slope 142, and the connecting arm 144 is located between the second chip-forming slope 143 and the chip-removing surface 145 at the bottom of the chip pocket 140; by adopting the structure design, the curled scraps are further curled towards the middle; in addition, the angle between the connecting arm 144 and the chip-removing surface 145 is gamma, and further, 180-2 gamma is set to be less than alpha, so that the chips entering the connecting arm are curled further towards the middle.
Meanwhile, in order to avoid the deviation of the chips to the side edge in the cutting process and keep the chips curled in the middle of the chip pocket 140, the side edge reinforcing arm 112 and the connecting arm 144 are connected through two second chip curling inclined surfaces 143, an included angle beta between the chip curling surfaces is designed to be larger than alpha, and the effect of adjusting the deviated and positive chip curling is mainly achieved, so that the surface quality of the workpiece processed by the cutting insert 10 is improved. In conclusion, the structural design of the cooperation of the first chip-rolling inclined surface 142, the second chip-rolling inclined surface 143 and the connecting arm 144 is adopted, so that the chip-rolling, chip-wrapping, chip-breaking and chip-discharging effects of the cutting insert 10 are effectively improved, and the surface quality of a workpiece machined by the cutting insert 10 is improved.
Optionally, the rake face 110 is provided with a side reinforcement arm 112 at its intersection with the side relief face 131; the side reinforcing arm 112 is connected to the second chip forming slope 143, one side of the side reinforcing arm 112 is connected to the widened negative rake angle surface 1112, the other side of the side reinforcing arm 112 extends toward the base portion 200, and the middle of the side reinforcing arm 112 is recessed inward to form an arc-shaped surface structure.
As shown in fig. 3-4 and 7, the cutting portion 100 is provided with side reinforcing arms 112 at the left and right sides thereof, and the side reinforcing arms 112 are recessed inward to form an arc-shaped surface structure, i.e., the side reinforcing arms face downward direction D D The recess forms an arc surface structure; the side reinforcing arm 112 with the structural design can effectively improve the side strength of the cutting blade 10, avoid side collapse under the cutting-off and grooving working condition of high-speed feeding, and prolong the service life of the blade.
Illustratively, as shown in FIG. 11, the side reinforcement arms 112 in the embodiment are inwardly recessed to form a C-shaped curved surface structure from D R The projection direction of the utility model is seen to be a C-shaped curl.
Alternatively, as shown in FIG. 8, the side reinforcing arms 112 may have a side arm width W B Side arm width W B Width W of cutting edge 150 c Has a relation of K CB ＝W C /W B Wherein, K is CB Greater than or equal to 15 and less than or equal to 30.
Side arm width W B By adopting the arrangement in the range, the side arm width W can be ensured B Sufficiently wide to further effectively increase the side strength of the cutting insert 10. For each of the above parameters W B、 K CB The specific values of (a) can be adjusted by those skilled in the art according to the actual requirements and the processing targets through the above formula, and are not limited herein.
Wherein, as shown in figures 3-4 and 8, the side arm width W B Is defined as: with D R Or D L In the linear direction as the direction for measuring the width of the side reinforcing arm 112, and D D In the direction projection, the distance between the side edge of the side reinforcing arm 112 near the side flank 131 (i.e., the side sub-edge 132) and the side edge of the side reinforcing arm 112 near the second chip-forming inclined surface 143 (i.e., the intersection line of the side reinforcing arm 112 and the second chip-forming inclined surface 143).
Alternatively, the chip-deflecting surface 145 is a curved surface structure recessed inwardly of the cutting part 100, i.e., the chip-deflecting surface 145 is directed D D A curved surface structure with a concave direction;
as shown in fig. 3, the chip is finally formed into a disk-like, C-shaped or 6-shaped chip by a chip-counter surface 145 provided in advance at the rear of the chip flute 140. The design of different curvatures of the chip-reversing surface 145 can influence the crimpness of chips during cutting and influence the chip breaking effect of the chips, so that the desired chip shape can be obtained; the specific values of the curvature parameters of the anti-chip surface 145 can be adjusted by those skilled in the art according to actual needs and processing targets, and are not limited herein.
Optionally, the cutting portion 100 further comprises a front support surface 120 at the bottom of the rake surface 110; the front support surface 120 extends down the bottom of the flank surface 121, i.e., toward D D The direction is extended; wherein the flank surface 121 is a slope extending in downward and inward directions from the negative chamfer surface 111, i.e., in a downward direction D D And a backward direction D B And (4) extending.
Optionally, the cutting portion 100 further comprises a flank 130 at the bottom of the flank relief surface 131; the side surface 130 extends downward along the bottom of the side flank surface 131, i.e., toward D D The direction is extended; the side flank surface 131 is a slope extending from the side reinforcing arm 112 in the downward direction and the inward direction, i.e., the left side surface 130 is in the downward direction D D And a rightward direction D R Extended, with the side 130 on the right side in the downward direction D D And a rightward direction D L And (4) extending.
Optionally, a side sub-edge 132 is formed at an intersection line of the side surface 130 and the negative chamfer surface 111, and an intersection angle of the front wide sub-edge 152 and the side sub-edge 132 forms a nose arc 133 by adopting an arc transition. Illustratively, the nose arc 133 has an arc radius R of greater than or equal to 0.2mm and less than or equal to 0.4mm.
For the base portion 200:
the base portion 200 includes an upper blade locating surface 210, a lower blade locating surface 220, and two blade side support surfaces 230 connecting the upper blade locating surface 210 and the lower blade locating surface 220.
For the tool:
the tool shown in the embodiment of fig. 2 includes a tool body 30 and a cutting insert 10 for cutting a workpiece 20, the cutting insert 10 being mounted on the tool body 30. Alternatively, the cutter body 30 is provided with a clamping portion and the cutting insert 10 is provided with a positioning structure for clamping and positioning the cutting insert 10 on the clamping portion on the cutter body 30. It should be noted that: in a specific application, the cutter body 30 may be provided with one or more clamping portions, and the cutting inserts 10 mounted on each clamping portion may be of the same type and structure, or may be different.
The tool of the present application has the technical effects of the cutting insert 10 described above, and the description thereof is omitted.
It should be noted that:
as shown in fig. 5, the cutting insert 10 of the embodiment of the present application is located at a middle position thereof along D L -D R The plane vertical to the paper surface is symmetrical, and the cutting parts 100 are symmetrically arranged at both ends of the base body part 200; the cutting insert 10 shown in this embodiment is only a preferred embodiment of the present application and is not intended to limit the present application in any way, and the cutting portion 100 of the present application may not be symmetrical about the centerline of the base portion 200, and is not limited to two cutting portions 100.
It is understood that the cutting insert shown in the present embodiment and the drawings thereof is only an example, in the present embodiment, the base body 200 is a rectangular parallelepiped-like "one" shaped structure, and the cutting portions 100 are provided at both end portions of the base body 200; according to the design concept, based on the structure and the using process of the cutting part 100, the base part 200 may also adopt other structural designs, and the number of the cutting parts 100 arranged on the corresponding base parts 200 with different structures can be adjusted, for example, the base part 200 adopts a cross-shaped structure or an L-shaped structure, etc., and the cutting part 100 is arranged at the end of the base part 200, including but not limited to the solution shown in the first embodiment.
In some embodiments, the cutting insert 10 may employ a cemented carbide substrate, and optionally, various functional or decorative coatings or the like may also be applied to the surface of the cutting insert 10 to enhance the performance of the cutting insert 10.
In addition, it should be appreciated by those skilled in the art that although a number of problems exist in the prior art, each embodiment or solution of the present application can be improved in one or more aspects without necessarily solving all the technical problems listed in the prior art or in the background. It will be understood by those skilled in the art that nothing in a claim should be taken as a limitation on that claim.
Although terms such as cutting portion, base portion, negative chamfer, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present application; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present application; the terms "first," "second," and the like in the description and in the claims, and in the foregoing description and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A cutting insert comprising a base portion (200) and a cutting portion (100) connected to the base portion (200); the method is characterized in that: the cutting part (100) comprises a rake surface (110), a flank surface (121) connecting the rake surface (110), and two side flank surfaces (131) for connecting the rake surface (110) and the flank surface (121);
wherein a cutting edge (150) is formed at the intersection of the rake surface (110) and the relief surface (121); a chip flute (140) is arranged on the rake face (110), a central rake face (141) is arranged in the direction of the chip flute (140) close to the cutting edge (150), a positive rake angle is formed between the central rake face (141) and a horizontal plane, and the width of the central rake face (141) is smaller than that of the cutting edge (150);
the rake face (110) is provided with a negative chamfer face (111) at the intersection position of the rake face and the flank face (121), the negative chamfer face (111) comprises a narrow negative rake face (1111) formed by extending the central rake face (141) to the cutting edge (150) and a widened negative rake face (1112) formed by extending the narrow negative rake face (1111) to the flank face (131), the cutting edge (150) comprises a narrow rake sub-edge (151) formed by connecting the narrow negative rake face (1111) with the flank face (121) and a wide rake sub-edge (152) formed by connecting the widened negative rake face (1112) with the flank face (121).
2. The cutting insert according to claim 1, wherein: the length L of the widened negative rake face (1112) 2 Width W of the cutting edge (150) c Has a relation of L 2 ＝W C 10+ lambda, said lambda being greater than or equal to 0.1mm.
3. The cutting insert according to claim 1, wherein: the width W of the front narrow sub-blade (151) z Greater than or equal to 0.3W C And less than or equal to 0.8W C 。
4. The cutting insert according to claim 1, wherein: length L of the narrow negative front corner face (1111) 1 Greater than or equal to 0.05mm and less than or equal to 0.18mm;
and/or the presence of a gas in the atmosphere,the length L of the widened negative rake face (1112) 2 Greater than or equal to 0.3mm and less than or equal to 1.0mm.
5. The cutting insert according to claim 1, wherein: the included angle between the negative inverted prism surface (111) and the horizontal plane is epsilon, and epsilon is more than or equal to 5 degrees and less than or equal to 15 degrees;
and/or the central front angle surface (141) forms an angle delta with the horizontal plane, wherein delta is greater than or equal to 15 degrees and less than or equal to 30 degrees.
6. The cutting insert according to any one of claims 1 to 5, wherein: the chip flutes (140) are respectively provided with a first chip coiling inclined plane (142) in the direction close to the side rear cutter surface (131);
the first chip forming slope (142) connects the central rake face (141) and the widened negative rake face (1112), respectively, and the first chip forming slope (142) gradually decreases the width of the chip flute (140) in the direction from the rake face (110) to the bottom of the chip flute (140).
7. The cutting insert according to claim 6, wherein: a second chip curling inclined plane (143) and a connecting arm (144) are further arranged on the chip flute (140) in the direction close to the side rear cutter face (131);
the second chip former slope and the connecting arm (144) are connected to the first chip former slope (142), and the connecting arm (144) is located between the second chip former slope (143) and a chip reverse face (145) at the bottom of the chip groove (140).
8. The cutting insert according to claim 7, wherein: a side reinforcing arm (112) is arranged on the intersection position of the front cutter surface (110) and the side rear cutter surface (131);
the side reinforcing arm (112) is connected with the second chip rolling inclined surface (143), one side of the side reinforcing arm (112) is connected with the widened negative front angle surface (1112), the other side of the side reinforcing arm (112) extends towards the direction of the base body part (200), and the middle position of the side reinforcing arm (112) is inwards sunken to form an arc-shaped surface structure.
9. The cutting insert according to claim 8, wherein: an included angle between the two first scrap rolling inclined planes (142) is alpha, and an included angle between the two second scrap rolling inclined planes (143) is beta; beta is larger than or equal to alpha, the included angle between the connecting arm (144) and the chip-removing surface (145) is gamma, and the value of 180-2 gamma is smaller than alpha;
said a is greater than or equal to 140 ° and less than or equal to 160 °; β is greater than or equal to 160 ° and less than or equal to 170 °; the γ is greater than or equal to 30 ° and less than or equal to 60 °.
10. A cutting tool, characterized by: comprising a cutter body (30) and a cutting insert (10) according to any one of claims 1-9, the cutting insert (10) being mounted on the cutter body (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211448896.0A CN115971520A (en) | 2022-11-18 | 2022-11-18 | Cutting blade and cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211448896.0A CN115971520A (en) | 2022-11-18 | 2022-11-18 | Cutting blade and cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115971520A true CN115971520A (en) | 2023-04-18 |
Family
ID=85957049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211448896.0A Pending CN115971520A (en) | 2022-11-18 | 2022-11-18 | Cutting blade and cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115971520A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117415348A (en) * | 2023-12-14 | 2024-01-19 | 赣州澳克泰工具技术有限公司 | Bevel cutting insert and cutting tool with enhanced chip breaking capability |
-
2022
- 2022-11-18 CN CN202211448896.0A patent/CN115971520A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117415348A (en) * | 2023-12-14 | 2024-01-19 | 赣州澳克泰工具技术有限公司 | Bevel cutting insert and cutting tool with enhanced chip breaking capability |
| CN117415348B (en) * | 2023-12-14 | 2024-03-15 | 赣州澳克泰工具技术有限公司 | Bevel cutting insert and cutting tool with enhanced chip breaking capability |
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