Machine clamp drill bit for machining deep and long hollow hole

Abstract

The utility model discloses a machine clamp drill bit used for machining deep and long hollow holes, which comprises a cutter handle, a cutter base body and a cutter head which are sequentially and coaxially connected from top to bottom, the cutter head is provided with a first cutter head chip groove and a second cutter head chip groove along the axial direction, and the inner wall of the lower end of the first cutter head chip groove is provided with a first mounting seat. A first peripheral cutter is embedded in the first mounting base, a second mounting base and a third mounting base are sequentially arranged on the inner wall of the lower end of the second tool bit chip removal groove from inside to outside, a center cutter is arranged in the second mounting base, and a second peripheral cutter is arranged in the third mounting base. According to the utility model, the central cutting edge and the peripheral cutting knife are arranged, so that the peripheral cutting knife participates in cutting along with the increase of the machining diameter in the reaming and drilling process. The chip removal groove is a straight groove and is grooved to the bottom of the cutter bar, so that the chip removal effect when the bottom of a deep hole is machined is guaranteed; and a guide strip for supporting is designed, the supporting and guiding effects are achieved in the drilling process, and the situation that the drilling direction is deflected due to swing and the like is prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of machining, specifically relates to a machine clamp drill bit for processing deep long hollow hole. BACKGROUND

[0002] With the rapid rise of new energy product market, new energy transmission product develops rapidly. New energy transmission integrates motor and control unit, and is more compact in internal structure than traditional transmission, and has less gear parts, but has higher precision. The high integration makes the shell part structure more complex, and the shaft part adopts long hollow structure to pursue light weight and meet the necessity of structure. The inner shaft of new energy transmission needs to bear high speed and load, and usually adopts high-strength material and is subjected to strict heat treatment to ensure durability and stability. The machining of the inner hole of such shaft, especially the deep long hole, is difficult, and the existing deep long hole machining mainly has the following defects: the machine clamp blade structure, when machining to the deep part of the part, the cutting resistance of the blade increases rapidly due to the reduction of the overall rigidity of the tool, the cutting parameter setting is quite conservative, the machining efficiency is low, the blade often falls off due to vibration during drilling, the tool base and the workpiece are in direct contact, and the machine tool is damaged; the twist drill cannot guarantee the roughness, when the inner hole diameter is larger, the tool and the grinding cost increase significantly; the machine clamp gun drill is low in efficiency and unstable, the tool shank is thin as a whole, the rigidity cannot be guaranteed during drilling, the reliability is poor, and the base and the workpiece are often burned. CONTENT OF THE UTILITY MODEL

[0003] In view of the defects and shortcomings of the prior art, the utility model aims at providing a machine clamp drill bit for machining deep long hollow hole to solve the technical problems of low machining efficiency, poor reliability and low yield in the prior art.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A machine clamp drill bit for machining deep long hollow hole, comprising a tool shank, a tool base and a tool head connected coaxially in sequence from top to bottom, a first tool head chip removal groove and a second tool head chip removal groove are formed on the tool head in the axial direction, a first mounting seat is arranged on the inner wall of the lower end of the first tool head chip removal groove, a first outer peripheral cutting tool is embedded in the first mounting seat, a second mounting seat and a third mounting seat are sequentially arranged from inside to outside on the inner wall of the lower end of the second tool head chip removal groove, a central cutting tool is arranged in the second mounting seat, and a second outer peripheral cutting tool is arranged in the third mounting seat.

[0006] The utility model has the following technical features:

[0007] Specific, the tool base body outer wall is provided with a first tool base body chip groove and a second tool base body chip groove respectively;

[0008] The first tool base body chip groove is communicated with the first tool bit chip groove, and the second tool base body chip groove is communicated with the second tool bit chip groove.

[0009] Further, the first tool bit chip groove and the second tool bit chip groove are provided with a chip breaking groove which spirally rises along the axial direction of the tool bit.

[0010] Further, the first tool base body chip groove and the second tool base body chip groove are straight grooves.

[0011] Further, the center cutting tool, the first peripheral cutting tool and the second peripheral cutting tool are connected to the tool bit by means of screws.

[0012] Further, a guide strip is arranged on the outer wall of the lower end of the tool base body.

[0013] Further, the diameter of the tool base body is smaller than the diameter of the tool bit.

[0014] Further, the center cutting tool comprises a first cutting surface, the first cutting surface is provided with a first cutting edge at the edge away from one end of the tool base body; the first peripheral cutting tool comprises a second cutting surface, the second cutting surface is provided with a second cutting edge at the edge away from one end of the tool base body; the second peripheral cutting tool comprises a third cutting surface, the third cutting surface is provided with a third cutting edge at the edge away from one end of the tool base body; the first cutting edge, the second cutting edge and the third cutting edge are located in the same plane.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] (1) the utility model discloses a structure design, and the shank can be directly connected with the machine tool spindle, reduces the intermediate assembly process, improves the overall rigidity of the drill bit;By setting the center cutting edge and the peripheral cutting tool, during the reaming process, as the machining diameter becomes larger, the peripheral cutting tools on both sides participate in cutting, and share the cutting resistance of the center cutting edge;Even if the machining process is abnormal, causes one side periphery blade to drop, and another peripheral cutting tool can participate in cutting, and the drill bit does not appear burning loss, and the overall swing of the drill bit is smaller.

[0017] (2) the chip groove of the utility model is designed as a straight groove structure, and is grooved to the bottom of the drill rod, guarantees the chip removal effect when machining to the deep hole bottom;Design support guide strip plays a supporting and guiding role during the drilling process, prevents the drilling direction from being deflected due to swing and the like.

[0018] (3) The utility model discloses simple structure, convenient to use, lower manufacturing cost, wide application range, good versatility, the product yield of processing is high, has higher economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall structure schematic diagram of the utility model;

[0020] Figure 2 It is the knife head plan view of the utility model;

[0021] Figure 3 It is the plan view of the utility model;

[0022] Figure 4 It is the partial structure sectional view of the utility model.

[0023] Reference numerals in the drawings:

[0024] 1-shank, 2-cutter base body, 3-knife head, 4-guide bar;21-first cutter base body chip flute, 22-second cutter base body chip flute;31-first knife head chip flute, 32-second knife head chip flute, 33-first outer periphery cutting tool, 34-center cutting tool, 35-second outer periphery cutting tool, 36-chip breaker groove;331-second cutting face, 341-first cutting face, 351-third cutting face;3311-second cutting edge;3411-first cutting edge, 3511-third cutting edge.

[0025] The specific content of the utility model is further explained and described in detail in combination with the following embodiments. DETAILED DESCRIPTION

[0026] The following gives the specific embodiments of the utility model, and it is explained that the utility model is not limited to the following specific embodiments, and any equivalent transformation based on the technical scheme of the application falls within the protection scope of the utility model.

[0027] The terms "upper", "lower", "front", "rear", "top", "bottom" and the like used in the utility model indicate the orientation or positional relationship only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, "inner", "outer" refers to the inner and outer of the corresponding component contour, and the above terms should not be understood as limiting the utility model.

[0028] In addition, the ordinal numbers "first", "second" and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features.

[0029] In this invention, unless otherwise stated, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] Example 1

[0031] Following the above technical solutions, such as Figures 1 to 4 As shown in the figure, this embodiment provides a machine-clamped drill bit for machining deep and long hollow holes, including a tool holder 1, a tool base 2, and a drill head 3 connected coaxially from top to bottom. Preferably, the tool holder 1, the tool base 2, and the drill head 3 can be designed as an integrated unit.

[0032] The cutting head 3 has a first chip removal groove 31 and a second chip removal groove 32 along the axial direction. In this embodiment, the first chip removal groove 31 and the second chip removal groove 32 are extended to the bottom of the tool base 2 to ensure the chip removal effect when machining to the bottom of the deep hole.

[0033] A first mounting base is provided on the lower inner wall of the first chip removal groove 31, and a first outer peripheral cutting tool 33 is embedded in the first mounting base. A second mounting base and a third mounting base are arranged sequentially from the inside to the outside on the lower inner wall of the second chip removal groove 32. A center cutting tool 34 is arranged in the second mounting base, and a second outer peripheral cutting tool 35 is arranged in the third mounting base. The first outer peripheral cutting tool 33, the center cutting tool 34, and the second outer peripheral cutting tool 35 are detachably mounted on the cutting head 3 by screws. Specifically, the first outer peripheral cutting tool 33 is mounted on the first mounting base by a first screw, the center cutting tool 34 is mounted on the second mounting base by a second screw, and the second outer peripheral cutting tool 35 is mounted on the third mounting base by a third screw.

[0034] The highest plane of the support is lower than the highest plane of the cutting tool. During drilling, the rake face of the cutting tool bears most of the cutting resistance. The first mounting base, the second support base, and the third support base can prevent the cutting parts of the first peripheral cutting tool 33, the center cutting tool 34, and the second peripheral cutting tool 35 from being suspended in the air, offset some of the cutting resistance, reduce screw stress, and ensure that the cutting tool is not easily dropped.

[0035] In this embodiment, the longitudinal cross-sectional area of ​​the second outer peripheral cutting tool 35 is smaller than the longitudinal cross-sectional area of ​​the third outer peripheral cutting tool 36, that is, as Figure 3As shown, the second peripheral cutting tool 35 and the third peripheral cutting tool 36 are different in size, and such a design is to ensure that even if an abnormality occurs during machining, causing one side of the peripheral cutting tool to fall off, the other side of the different size peripheral cutting tool will continue to participate in cutting, and the drill will not be burned out.

[0036] As shown, as a preferred embodiment of the present embodiment, a first tool base body chip removal groove 21 and a second tool base body chip removal groove 22 are respectively formed on the outer wall of the tool base body 2; the first tool base body chip removal groove 21 is in communication with the first tool head chip removal groove 31, and the second tool base body chip removal groove 22 is in communication with the second tool head chip removal groove 32, thereby forming a chip breaking and discharging passage. Figure 2

[0037] As a preferred embodiment of the present embodiment, the first tool base body chip removal groove 21 and the second tool base body chip removal groove 22 are both straight grooves.

[0038] As a preferred embodiment of the present embodiment, the first tool head chip removal groove 31 and the second tool head chip removal groove 32 are both provided with a chip breaking groove 36 spirally rising along the axial direction of the tool head 3, one end of the chip breaking groove 36 extends to the top end of the tool head 3, and the other end extends to the tool base body 2. Specifically, the first tool head chip removal groove 31 extends to the first tool base body chip removal groove 21, the second tool head chip removal groove 32 extends to the second tool base body chip removal groove 22, and

[0039] The chip breaking groove 36 can cut the chips.

[0040] The chip breaking groove 36 in the present embodiment can be machined by using existing processes. After the chip breaking groove 36 is set, the waste chips generated by cutting can be better discharged into the chip removal groove, so that the precision of the deep hole wall machined is good, the service life of the drill is longer, and the machining efficiency can also be improved accordingly.

[0041] As a preferred embodiment of the present embodiment, the center cutting tool 34, the first peripheral cutting tool 33, and the second peripheral cutting tool 35 are connected to the tool head 3 by means of screws.

[0042] As a preferred embodiment of the present embodiment, a guide strip 4 is arranged on the outer wall of the lower end of the tool base body 2.

[0043] The guide strip 4 is used to support and guide during cutting to prevent the drilling direction from being deviated due to swinging and other reasons.

[0044] As a preferred embodiment of the present embodiment, the diameter of the tool base body 2 is smaller than the diameter of the tool head 3, and the diameter of the tool shank 1 is smaller than the diameter of the tool base body 2.

[0045] ​As a preferred scheme of the embodiment, the center cutting tool 34 comprises a first cutting surface 341, the first cutting surface 341 is provided with a first cutting edge 3411 at the edge away from one end of the tool base 2; the first peripheral cutting tool 33 comprises a second cutting surface 331, the second cutting surface 331 is provided with a second cutting edge 3311 at the edge away from one end of the tool base 2; the second peripheral cutting tool 35 comprises a third cutting surface 351, the third cutting surface 351 is provided with a third cutting edge 3511 at the edge away from one end of the tool base 2; the first cutting edge 3411, the second cutting edge 3311 and the third cutting edge 3511 are located in the same plane. Simultaneously participating in cutting, the resistance in the axial direction during drilling is more uniform, the drill bit swings less, and the rigidity during drilling is ensured.

[0046] The utility model discloses in using: first, the handle is equipped to lathe main shaft, then carries out the tool setting adjustment, determines the safety plane and the drilling depth, drills the pilot hole as the centering of deep hole, and the convenient deep hole drill continues processing, also avoids the deflection situation in the drilling process, sets the rotating speed and the feed, and starts drilling.

[0047] The above implementation process is only an example for clearly illustrating the present application, and is not a limitation on the implementation mode. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation modes cannot be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A machine clamp drill bit for machining deep long hollow holes, comprising a shank (1), a tool base body (2) and a tool head (3) connected coaxially in sequence from top to bottom, characterized in that, The cutter head (3) is provided with a first cutter head chip groove (31) and a second cutter head chip groove (32) axially, the first cutter head chip groove (31) is provided with a first mounting seat on the inner wall of the lower end, the first mounting seat is embedded with a first peripheral cutting tool (33), the second cutter head chip groove (32) is provided with a second mounting seat and a third mounting seat from inside to outside on the inner wall of the lower end in sequence, the second mounting seat is provided with a center cutting tool (34), and the third mounting seat is provided with a second peripheral cutting tool (35).

2. The machine drill for machining a deep long hollow hole according to claim 1, wherein The outer wall of the cutter base (2) is provided with a first cutter base chip groove (21) and a second cutter base chip groove (22) respectively; The first cutter base chip groove (21) is communicated with the first cutter head chip groove (31), and the second cutter base chip groove (22) is communicated with the second cutter head chip groove (32).

3. The machine drill for machining a deep long hollow hole according to claim 1, wherein The first cutter head chip groove (31) and the second cutter head chip groove (32) are provided with a chip breaker (36) which spirally rises along the cutter head (3) axially, one end of the chip breaker (36) extends to the top end of the cutter head (3), and the other end extends to the cutter base (2).

4. The machine drill for machining a deep long hollow hole according to claim 2, wherein The first cutter base chip groove (21) and the second cutter base chip groove (22) are straight grooves.

5. The machine drill for machining a deep long hollow hole according to claim 1, wherein The center cutting tool (34), the first peripheral cutting tool (33) and the second peripheral cutting tool (35) are connected with the cutter head (3) by means of screws.

6. The machine drill for machining a deep long hollow hole according to claim 1, wherein The lower end of the outer wall of the cutter base (2) is provided with a guide strip (4).

7. The machine drill for machining a deep long hollow hole according to claim 1, wherein The diameter of the cutter base (2) is smaller than the diameter of the cutter head (3).

8. The machine drill for machining a deep long hollow hole according to claim 1, wherein The center cutting tool (34) comprises a first cutting surface (341), and the first cutting surface (341) is provided with a first cutting edge (3411) at the edge of the end away from the cutter base (2); the first peripheral cutting tool (33) comprises a second cutting surface (331), and the second cutting surface (331) is provided with a second cutting edge (3311) at the edge of the end away from the cutter base (2); the second peripheral cutting tool (35) comprises a third cutting surface (351), and the third cutting surface (351) is provided with a third cutting edge (3511) at the edge of the end away from the cutter base (2); the first cutting edge (3411), the second cutting edge (3311) and the third cutting edge (3511) are located in the same plane.

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