Small-diameter cutter and cutter sleeve thereof

Abstract

A plurality of positioning surfaces are arranged on the side wall of a clamping end of the small-diameter cutter, a cooling pipeline penetrating through the clamping end is arranged on the positioning surfaces, the cooling pipeline directly faces a cutting edge of a cutting end, and the small-diameter cutter and a wedge block are embedded at one end of the cutter sleeve. The outer wall of the clamping end of the small-diameter cutter is provided with a plurality of positioning surfaces, and one end part of the cutter sleeve is provided with the positioning groove and the wedge-shaped block which are matched with the outline of the outer wall of the cutter sleeve, so that the wedge-shaped block and the clamping end (the small-diameter cutter) can be fixed on the cutter sleeve in a manner of locking a screw at the top end part; the problems of error accumulation and operation limitation in a conventional side end positioning mode are solved, and the cutter is convenient to lock and position and convenient to disassemble; the cooling pipeline right opposite to the cutting edge is arranged at the clamping end, cooling liquid can be guided in and directly jetted to the cutting edge, the heat dissipation efficiency is improved, and the service life of the cutter is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to small diameter hole machining cutter technical field, especially small diameter cutter and its cutter sleeve. BACKGROUND

[0002] In the part turning machining production, there are many small diameter hole reprocessing, such as boring, profiling, inner groove, reverse pulling processing, thread processing etc., the current market whole small diameter cutter generally adopts side edge fixed mode, and the tool changing operation or overhaul needs to be carried out on the side, sometimes it is limited by the machining equipment layout, and the operation is more troublesome, and because the neck extension length of different cutters is different, the rigidity of the cutter also has difference, and when the cutter is changed, the machining precision of the same machining equipment is often different. SUMMARY

[0003] In view of the problems existing in the prior art, the utility model provides small diameter cutter and its cutter sleeve, the wedge block and the clamping end (small diameter cutter) can be fixed on the cutter sleeve through the mode of the top end locking screw, the problems of error accumulation and operation limitation encountered in the conventional side end positioning mode are solved, the cutter locking positioning is convenient and easy to disassemble, and cooling liquid can be introduced and directly sprayed on the cutting edge, the heat dissipation efficiency is improved, and the service life of the cutter is prolonged.

[0004] To solve the above technical problems, the utility model takes a technical scheme as follows:

[0005] Small diameter cutter, including clamping end, rod body and cutting end which are integrally formed and arranged in sequence along the axial direction, wherein:

[0006] The clamping end is a column or a conical structure with a V-shaped cross section, one end or an end with larger contour size is connected with the rod body, a cooling pipeline capable of containing cooling liquid and penetrating through both end portions of the clamping end is formed on the clamping end, and a plurality of positioning surfaces are symmetrically formed on the side wall of the clamping end;

[0007] The rod body is a column structure, and the outer contour projection thereof falls on the inner side of the clamping end, one end portion thereof is smoothly connected with the clamping end through a first arc surface, and an open end of the cooling pipeline is arranged on the first arc surface;

[0008] The cutting end is provided with a cutting edge, the cutting edge is arranged on the radial side of the end portion of the rod body and on the spraying path of the cooling liquid.

[0009] As a further elaboration of the above technical scheme:

[0010] In the above technical solution, the several positioning surfaces include two first positioning surfaces, two second positioning surfaces and a third positioning surface; the two first positioning surfaces are parallel planes and are symmetrically arranged on two opposite side walls of the clamping end; the two second positioning surfaces are both inclined surfaces and are symmetrically arranged on two opposite side walls of the clamping end, and one end of each of the two second positioning surfaces is smoothly connected through a second arc surface, and the other end of each of the two second positioning surfaces intersects with a first positioning surface; the two third positioning surfaces are coplanar and are symmetrically arranged on two sides of the central groove of the clamping end, and the two third positioning surfaces are both planes and one end of each of the two third positioning surfaces smoothly connects with the groove, and the other end of each of the two third positioning surfaces smoothly connects with a first positioning surface.

[0011] In the above technical solution, an empty space is formed at the intersection of each first positioning surface and the second and third positioning surfaces.

[0012] In the above technical solution, the side wall of the groove is a curved surface or an arc surface.

[0013] In the above technical solution, a rake surface, a relief surface, a chip breaker groove and a chip flute are formed on the cutting end, the intersection of the rake surface and the relief surface forms the cutting edge, the rake surface and / or the relief surface connects with the chip breaker groove, and the chip flute connects with the chip breaker groove and extends to the shank or beside the shank.

[0014] The technical scheme adopted by the utility model is as follows:

[0015] The tool sleeve of the small-diameter cutter is provided with a positioning piece at one end of the tool sleeve, the positioning piece is matched with the clamping end in the above technical solution, and a communication pipeline that can be connected with the cooling pipeline is further arranged on the tool sleeve.

[0016] Further elaboration on the above technical solution is as follows:

[0017] In the above technical solution, the positioning piece includes a positioning groove, a wedge-shaped block and a double-headed screw, the wedge-shaped block and the clamping end can be matched and accommodated in the positioning groove, one side of the wedge-shaped block can be matched and buckled with one side of the clamping end, and the two ends of the double-headed screw are respectively screwed with the larger end of the wedge-shaped block and the tool sleeve.

[0018] In the above technical solution, a draft angle is formed on the side wall of the positioning groove.

[0019] In the above technical solution, the larger end of the wedge-shaped block and the bottom end of the positioning groove are both formed with a threaded hole matched with the double-headed screw.

[0020] Compared with the prior art, the small-diameter cutter has the advantages that: the plurality of positioning surfaces are arranged on the clamping end outer wall of the small-diameter cutter, and the positioning groove and the wedge-shaped block matched with the outer wall contour are arranged on one end of the cutter sleeve, the wedge-shaped block and the clamping end (the small-diameter cutter) can be fixed on the cutter sleeve through the mode of the top end locking screw, the problems of error accumulation and operation limitation in the conventional side end positioning mode are solved, the cutter locking and positioning are convenient and the cutter is convenient to disassemble; the cooling pipeline opposite to the cutting edge is arranged on the clamping end, the cooling liquid can be introduced and directly sprayed on the cutting edge, the heat dissipation efficiency is improved, and the service life of the cutter is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structure schematic view of the small-diameter cutter in the embodiment;

[0022] Figure 2 is a cross-sectional structure schematic view of the clamping end of the small-diameter cutter in the embodiment;

[0023] Figure 3 is a structure schematic view of the clamping end of the small-diameter cutter in the embodiment; Figure 1

[0024] Figure 4 is an assembly structure schematic view of the cutter sleeve and the small-diameter cutter in the embodiment;

[0025] Figure 5 is a structure schematic view of the cutter sleeve in the embodiment;

[0026] Figure 6 is a structure schematic view of the wedge-shaped block in the embodiment.

[0027] In the drawing: 100, small-diameter cutter; 200, cutter sleeve; 10, clamping end; 11, cooling pipeline; 12, first positioning surface; 13, second positioning surface; 14, third positioning surface; 15, second arc surface; 16, groove; 17, clearance; 20, shank; 21, first arc surface; 30, cutting end; 31, rake face; 32, first relief face; 33, second relief face; 34, circular arc surface; 35, chip breaking groove; 36, chip removal groove; 40, positioning member; 41, positioning groove; 42, wedge-shaped block; 43, double-headed screw; 1, main cutting edge; 2, auxiliary cutting edge; 3, round nose; 4, communication pipeline; 5, threaded hole. DETAILED DESCRIPTION

[0028] The utility model will be further explained in detail in combination with the drawings.

[0029] ​The embodiments described with reference to the drawings are exemplary and are intended to be used for explaining the present application and cannot be understood as a limitation of the present application. In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "several", "a plurality of" is two or more, unless otherwise explicitly specified and limited. In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be a fixed connection, or it can be a detachable connection, or it can be integrally connected; it can be a mechanical connection, or it can be an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature with respect to the second feature can include the direct contact of the first and second features, or it can include the indirect contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature with respect to the second feature include the vertical direction of the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "lower", "lower" and "lower" of the first feature with respect to the second feature include the vertical direction of the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0030] As Figures 1-2 shown, the small-diameter cutter 100 includes a clamping end 10, a shank 20 and a cutting end 30 which are integrally formed and arranged in sequence in the axial direction; wherein:

[0031] The clamping end 10 is a column or frustum structure with a V-shaped cross section, one end or the end with larger contour size is connected with the shank 20, a cooling pipe 11 capable of containing cooling liquid and penetrating through both end portions of the clamping end 10 is formed on the clamping end 10, and a plurality of positioning surfaces are symmetrically formed on the side wall of the clamping end 10;

[0032] The rod body 20 is a cylindrical structure and its outer contour projection falls on the inner side of the clamping end 10. One end of it is smoothly connected to the clamping end 10 through the first arc surface 21. One open end of the cooling pipe 11 is located on the first arc surface 21.

[0033] A cutting edge is formed on the cutting end 30. The cutting edge is located on the radial side of the end of the rod body 20 and is located in the spray path of the cooling liquid.

[0034] like Figure 2 As shown, the positioning surfaces include two first positioning surfaces 12, two second positioning surfaces 13, and a third positioning surface 14. The two first positioning surfaces 12 are parallel planes symmetrically arranged on two opposite sidewalls of the clamping end 10. The two second positioning surfaces 13 are both inclined planes symmetrically arranged on two opposite sidewalls of the clamping end 10, and one end of each is smoothly connected by a second arc surface 15, while the other end intersects with a first positioning surface 12. The two third positioning surfaces 14 are coplanar and symmetrically arranged on both sides of the groove 16 in the middle of the clamping end 10. The two third positioning surfaces 14 are both planes, and one end of each is smoothly connected to the groove 16, while the other end is smoothly connected to a first positioning surface 12. The sidewalls of the groove 16 are curved or arc-shaped. A clearance portion 17 is formed at the intersection of each first positioning surface 12 with the second positioning surface 13 and the third positioning surface 14.

[0035] Figure 3 The structure of the cutting end 30 in one embodiment of the present invention is shown. The cutting end 30 has a rake face 31, a first flank face 32, a second flank face 33, an arc surface 34, a chip breaker groove 35, and a chip removal groove 36. The rake face 31 intersects the first flank face 32, the second flank face 33, and the arc surface 34 at an incline, and forms a main cutting edge 1, a secondary cutting edge 2, and a rounded tip 3 at the intersection. The main cutting edge 1, the secondary cutting edge 2, and the rounded tip 3 are all located on the spray path of the coolant. The rake face 31, the first flank face 32, and the second flank face 33 are all in contact with the chip breaker 35. The chip removal groove 36 is in contact with the chip breaker groove 35 and extends to the 20 bar body.

[0036] like Figures 4-6 As shown, in another embodiment of the tool holder 200 used to secure the small-diameter tool 100, one end of the tool holder 200 is provided with a positioning member 40 that is adapted to the clamping end 10 in the above embodiment, and the tool holder 200 is also provided with a connecting pipe 4 that can be connected to the cooling pipe 11.

[0037] like Figure 4 As shown, the positioning component 40 includes a positioning groove 41, a wedge block 42, and a double-ended screw 43. The positioning groove 41 can accommodate the wedge block 42 and the clamping end 10. One side of the outer wall of the wedge block 42 can be matched and engaged with one side of the outer wall of the clamping end 10. The two ends of the double-ended screw 43 are screwed to the larger end of the wedge block 42 and the blade sleeve 200, respectively.

[0038] As Figures 5-6 shown, the side wall of the positioning groove 41 is formed with a draft angle, the larger end of the wedge-shaped block 42 and the bottom end of the positioning groove 41 are both formed with a threaded hole 5 matched with the stud bolt 43, and the communication pipeline 4 extends to the bottom of the positioning groove 41.

[0039] During assembly, first, the wedge-shaped block 42 is screwed into the positioning groove 41 through the stud bolt 43 without locking, then the clamping end 10 of the small-diameter cutter 100 is placed in and the third positioning surface 14 is abutted against the side wall of the positioning groove 41, at the same time, the first positioning surface 12, the second positioning surface 13, the third positioning surface 14 and the second arc surface 15 are respectively abutted against the positioning groove 41, finally, the stud bolt 43 is tightened, the wedge-shaped block 42 is abutted against between the clamping end 11 and the positioning groove 41 by using the self-locking principle of the wedge-shaped block 42, the small-diameter cutter 100 is locked in the tool holder 200, and finally the rubber tube is passed through the cooling pipeline 11 and the communication pipeline 4 and connected to the cooling system.

[0040] During use, the tool holder 200 with the small-diameter cutter 100 fixed thereon is directly connected to the machining spindle, and the tool holder 200 and the small-diameter cutter 100 are driven to rotate and cut, the cooling liquid is directly sprayed on the cutting edge from the cooling pipeline 11 to cool, and the chips and the cooling liquid are discharged to the periphery of the shank 20 from the chip groove 36.

[0041] The utility model discloses a plurality of positioning surfaces are equipped on the outer wall of the clamping end 10 of the small-diameter cutter 100, and the positioning groove 41 and the wedge-shaped block 42 matched with the outer wall contour are arranged at one end of the tool holder 200, the wedge-shaped block 42 and the clamping end 10 (the small-diameter cutter 100) can be fixed on the tool holder 200 by the mode of locking the stud bolt 43 at the top end, the problems of error accumulation and operation limitation in the conventional side end positioning mode are solved, the cutter locking and positioning are convenient and easy to disassemble, the cooling pipeline 11 directly opposite the cutting edge is arranged on the clamping end 10, the cooling liquid can be introduced and directly sprayed on the cutting edge, the heat dissipation efficiency is improved, and the service life of the cutter is prolonged.

[0042] The above is not any limitation on the technical range of the utility model, any modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belong to the range of the technical scheme of the utility model.

Claims

1. A small-diameter cutter comprising a clamping end, a shank and a cutting end which are integrally formed and arranged in sequence along an axial direction, characterized in that: the clamping end is a column or a frustum structure with a V-shaped cross section, one end or an end with a larger contour size thereof is connected to the shank, a cooling pipeline is formed on the clamping end and penetrates through both end portions thereof, and a plurality of positioning surfaces are symmetrically formed on the side wall of the clamping end; the shank is a column structure and its outer contour projection falls on the inner side of the clamping end, one end portion thereof is smoothly connected to the clamping end through a first curved surface, and an open end of the cooling pipeline is arranged on the first curved surface; the cutting end is provided with a cutting edge, the cutting edge is arranged on the radial side of the end portion of the shank and on the spraying path of the cooling liquid. The plurality of positioning surfaces include two first positioning surfaces, two second positioning surfaces and a third positioning surface: the two first positioning surfaces are parallel planes and are symmetrically arranged on the two opposite side walls of the clamping end; the two second positioning surfaces are both inclined surfaces and are symmetrically arranged on the two opposite side walls of the clamping end, one end portion of each of the two second positioning surfaces is smoothly connected through a second curved surface, and the other end portion of each of the two second positioning surfaces intersects with one of the first positioning surfaces; the two third positioning surfaces are coplanar and are symmetrically arranged on the two sides of a central groove of the clamping end, the two third positioning surfaces are both planes, one end portion of each of the two third positioning surfaces smoothly connects with the groove, and the other end portion of each of the two third positioning surfaces smoothly connects with one of the first positioning surfaces.

2. The small-diameter cutter according to claim 1, characterized by An avoidance portion is formed at the intersection of each of the first positioning surfaces and the second positioning surfaces and the third positioning surfaces.

3. The small-diameter cutter according to claim 2, characterized by The side wall of the groove is a curved surface or an arc surface.

4. The small-diameter cutter according to Claim 2, characterized by The cutting end is provided with a rake face, a relief face, a chip breaker groove and a chip flute, the intersection of the rake face and the relief face forms the cutting edge, the rake face and / or the relief face connects with the chip breaker groove, and the chip flute connects with the chip breaker groove and extends to the shank or the side thereof.

5. The small-diameter cutter according to Claim 1, wherein One end portion of the cutter sleeve is provided with a positioning member adapted to the clamping end of any one of claims 1-5, and a communication pipeline adapted to the cooling pipeline is further arranged on the cutter sleeve.

6. A tool holder for small diameter tools, characterised in that The positioning member includes a positioning groove, a wedge-shaped block and a double-headed screw, the positioning groove can match and accommodate the wedge-shaped block and the clamping end, one side outer wall of the wedge-shaped block can match and engage with one side outer wall of the clamping end, and two ends of the double-headed screw are respectively screwed with the larger end portion of the wedge-shaped block and the cutter sleeve.

7. The knife shield of claim 6, wherein, A draft angle is formed on the side wall of the positioning groove.

8. The knife sheath of claim 7, wherein, The larger end portion of the wedge-shaped block and the bottom end portion of the positioning groove are both provided with a threaded hole adapted to the double-headed screw.

9. The knife sheath of claim 7, wherein, ​

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