Efficient multi-cutting-edge adjustable boring cutter

Abstract

The utility model discloses an efficient multi-blade adjustable boring cutter which comprises a cutter bar, a cutter head and a milling mechanism, the cutter head is connected to one end of the cutter bar, a modularized detachable structure is arranged between the cutter bar and the cutter head, the cutter head is provided with a plurality of blade number modules, and the milling mechanism is arranged at one end, far away from the cutter bar, of the cutter head. The boring cutter has the advantages that due to the tool bits arranged in a modularized mode, the boring cutter supports rapid replacement of tool bit modules with different blade numbers and replacement of different blade models, the boring cutter is used for machining different cut materials, the inclined face of the first wedge-shaped block is used for pushing the cutter clamp to move, and the machining efficiency is improved. The side face of the tool holder is rapidly locked through the inclined face of the second wedge block, a small gap after adjustment is eliminated through the self-locking characteristic, it is ensured that the position of a blade is stable in the cutting process, vibration and deformation are restrained, and the tool holder is particularly suitable for small-diameter tool bodies, the first wedge block and the second wedge block are matched with precise thread driving; and micron-sized adjustment of the radial position of the blade can be realized.

Description

Technical Field

[0001] This utility model relates to a boring tool, specifically a high-efficiency multi-blade adjustable boring tool, belonging to the field of boring tool technology. Background Technology

[0002] As a key tool in hole machining, the boring tool's core function is to correct the deviation of the hole system axis and achieve high-precision machining. Compared with drilling and reaming processes, boring can adjust the positional accuracy of the original hole through multiple toolpaths, making it particularly suitable for machining large-diameter holes or hole systems with high positional accuracy requirements. Traditional boring tools have economic advantages in single-piece or small-batch production.

[0003] However, most existing boring tools have various problems. For example, in a multi-functional boring tool disclosed in CN103769631A, although it can clamp drills, milling cutters, and boring tools, has an adjustment mechanism, adjustable machining dimensions, a wide machining range, is easy to use, and improves efficiency, and the tools can share a single tool body to save costs, in this technical solution and most current technical solutions, the boring tool is mostly a single-edge structure. Although the single-edge boring tool structure is simple and flexible to adjust, the machining efficiency is low. It relies on only a single cutting edge to complete material removal, the metal removal rate is limited, and the machining accuracy depends on the operator's experience. The adjustment process is time-consuming and difficult to achieve consistency. Especially in mass production, it is difficult to meet the high-efficiency requirements. Although the multi-edge design can theoretically improve efficiency, small-diameter boring tools have insufficient rigidity of the tool holder system. Simultaneous cutting by multiple edges can easily cause vibration and deformation, resulting in deterioration of the machined surface roughness or even dimensional deviation. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings of existing technologies by proposing a highly efficient multi-blade adjustable boring tool.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency multi-blade adjustable boring bar includes a tool holder, a cutting head, and a milling mechanism. The cutting head is connected to one end of the tool holder, and the tool holder and the cutting head have a modular and detachable structure. The cutting head is provided with multiple cutting edge modules, and the milling mechanism is located at the end of the cutting head away from the tool holder.

[0007] The milling mechanism includes a tool holder mounting groove, a tool holder, a milling insert, and an adjustment unit. The tool holder mounting groove is recessed at the end of the tool head away from the tool holder. The tool holder is locked in the tool holder mounting groove, and the milling insert is connected and locked to the tool holder.

[0008] The adjustment unit includes a first adjustment groove, a first wedge block, and a first adjustment screw. The first adjustment groove is recessed into the cutter head and located at one end of the cutter clamp mounting groove. The first wedge block is engaged in the first adjustment groove, and its wedge surface abuts against one end of the cutter clamp. The first adjustment screw passes through the first wedge block and is threadedly engaged with the cutter head.

[0009] As a further embodiment of this utility model: the adjustment unit further includes a second adjustment groove, a second wedge block, and a second adjustment screw. The second adjustment groove is recessed on the cutter head and located at the center of one side of the cutter clamp mounting groove. The second wedge block is engaged in the second adjustment groove, and the wedge surface slides against the side wall of the cutter clamp. The second adjustment screw passes through the second wedge block and is threadedly engaged with the cutter head.

[0010] As a further improvement of this utility model: the top of the blade holder is provided with a threaded hole through it at an angle, and a locking screw is engaged with the threaded hole. One end of the locking screw abuts against the bottom of the blade holder mounting groove.

[0011] As a further improvement of this utility model: the milling insert substrate is made of superhard diamond with a surface hardness ≥9000HV, and the tool holder is made of high-toughness quenched steel with a tensile strength ≥1500MPa.

[0012] As a further improvement of this utility model: the side wall of the blade holder is provided with an abutment surface, the abutment surface is inclined and cooperates with the wedge surface of the second wedge block.

[0013] As a further improvement of this utility model: a liquid injection chamber is provided at the shaft center of the cutter bar, and a spray hole is provided on the cutter head. There are multiple spray holes, all of which are in communication with the liquid injection chamber.

[0014] The beneficial effects of this utility model are:

[0015] In this invention, the modularly designed cutting head allows the boring tool to support quick replacement of cutting head modules with different numbers of cutting edges, such as 3 or 4, to adapt to different machining scenarios. It also supports the replacement of different insert models, making it suitable for machining different materials. The inclined surface of the first wedge block pushes the tool holder to move, and the inclined surface of the second wedge block achieves quick locking of the side of the tool holder. The self-locking characteristic eliminates the small gaps after adjustment, ensuring the stability of the insert position during cutting and suppressing vibration and deformation. It is especially suitable for small-diameter tool bodies. The first and second wedge blocks work together with a precision thread drive to achieve micron-level adjustment of the radial position of the insert, meeting the requirements of high-precision hole machining, while reducing the time spent on repeated manual calibration. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Enlarged view at point A;

[0018] Figure 3 This is a schematic diagram of the tail section structure of the tool holder of this utility model;

[0019] Figure 4 This is a schematic diagram of the overall connection structure of the knife clip of this utility model;

[0020] In the diagram: 1. Tool holder, 2. Tool head, 3. Milling mechanism, 31. Tool holder mounting slot, 32. Tool holder, 33. Milling insert, 34. First adjustment slot, 35. First wedge block, 36. First adjustment screw, 37. Second adjustment slot, 38. Second wedge block, 39. Second adjustment screw, 4. Locking screw, 5. Abutment surface, 6. Injection chamber, 7. Spray hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] like Figures 1 to 4 As shown, a high-efficiency multi-blade adjustable boring tool includes a tool holder 1, a cutting head 2, and a milling mechanism 3. The cutting head 2 is connected to one end of the tool holder 1, and the tool holder 1 and the cutting head 2 have a modular and detachable structure. The cutting head 2 is provided with multiple cutting edge modules, and the milling mechanism 3 is located at the end of the cutting head 2 away from the tool holder 1.

[0023] The milling mechanism 3 includes a tool holder mounting groove 31, a tool holder 32, a milling insert 33, and an adjustment unit. The tool holder mounting groove 31 is recessed at the end of the cutter head 2 away from the tool holder 1. The tool holder 32 is locked in the tool holder mounting groove 31, and the milling insert 33 is connected and locked on the tool holder 32.

[0024] The adjustment unit includes a first adjustment groove 34, a first wedge block 35, and a first adjustment screw 36. The first adjustment groove 34 is recessed on the cutter head 2 and located at one end of the cutter clamp mounting groove 31. The first wedge block 35 is engaged in the first adjustment groove 34, and the wedge surface abuts against one end of the cutter clamp 32. The first adjustment screw 36 passes through the first wedge block 35 and is threadedly engaged with the cutter head 2.

[0025] The adjustment unit also includes a second adjustment groove 37, a second wedge block 38, and a second adjustment screw 39. The second adjustment groove 37 is recessed on the cutter head 2 and located at the center of one side of the cutter clamp mounting groove 31. The second wedge block 38 is engaged in the second adjustment groove 37 and its wedge surface slides against the side wall of the cutter clamp 32. The second adjustment screw 39 passes through the second wedge block 38 and is threadedly engaged with the cutter head 2.

[0026] In this invention, the modularly designed cutting head 2 allows the boring tool to support quick replacement of cutting head modules with different numbers of cutting edges, such as 3 or 4, to adapt to different machining scenarios. It also supports the replacement of different insert models, making it suitable for machining different materials. The inclined surface of the first wedge block 35 pushes the tool holder 32 to move, and the inclined surface of the second wedge block 38 achieves quick locking of the side of the tool holder 32. The self-locking characteristic eliminates the small gaps after adjustment, ensuring the stability of the insert position during cutting and suppressing vibration and deformation. It is especially suitable for small-diameter tool bodies. The first wedge block 35 and the second wedge block 38 work together with a precision thread drive to achieve micron-level adjustment of the radial position of the insert, meeting the requirements of high-precision hole machining, while reducing the time spent on repeated manual calibration. Example 2

[0027] like Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0028] The top of the tool holder 32 is inclined and has a threaded hole. A locking screw 4 is fitted inside the threaded hole. One end of the locking screw 4 abuts against the bottom of the tool holder mounting groove 31. The locking screw 4 is used to lock the top of the tool holder 32 and ensure the stability of the tool holder 32.

[0029] The milling insert 33 has a matrix of superhard diamond with a surface hardness ≥9000HV, and the tool holder 1 is made of high-toughness quenched steel with a tensile strength ≥1500MPa, which improves the overall service life of the boring tool.

[0030] The side wall of the blade holder 32 is provided with an abutment surface 5. The abutment surface 5 is inclined and cooperates with the wedge surface of the second wedge block 38. The abutment surface 5 increases the contact area between the second wedge block 38 and the blade holder 32, thereby ensuring the stability of the locking.

[0031] A liquid injection chamber 6 is provided at the axis of the tool holder 1, and a spray hole 7 is provided on the tool head 2. Multiple spray holes 7 are provided, and all of them are connected to the liquid injection chamber 6. Coolant is sprayed through the spray holes 7 to achieve the internal cooling effect of the boring tool, and at the same time, it can also wash away the waste chips.

[0032] Working principle: When using this boring bar, first combine the appropriate type of cutter head 2 with the cutter bar 1 according to actual needs. Then connect the external guide pipe to the liquid injection chamber 6, guide the coolant through the external guide pipe, and spray it out through the spray hole 7 to start the milling operation. When it is necessary to adjust the position of the milling cutter 33, first turn the first adjusting screw 36, and push the tool holder 32 to the designated position through the inclined surface of the first wedge block 35. Then turn the second adjusting screw 39, and lock the side of the tool holder 32 through the inclined surface of the second wedge block 38.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency multi-blade adjustable boring bar, comprising a tool holder (1), a tool head (2), and a milling mechanism (3), characterized in that, The cutting head (2) is connected to one end of the tool holder (1), and the tool holder (1) and the cutting head (2) are modular and detachable. The cutting head (2) is provided with multiple cutting edge modules, and the milling mechanism (3) is located at the end of the cutting head (2) away from the tool holder (1). The milling mechanism (3) includes a tool holder mounting groove (31), a tool holder (32), a milling insert (33), and an adjustment unit. The tool holder mounting groove (31) is recessed at one end of the cutter head (2) away from the tool bar (1). The tool holder (32) is locked in the tool holder mounting groove (31), and the milling insert (33) is connected and locked on the tool holder (32). The adjustment unit includes a first adjustment groove (34), a first wedge block (35) and a first adjustment screw (36). The first adjustment groove (34) is recessed on the cutter head (2) and located at one end of the cutter clamp mounting groove (31). The first wedge block (35) is engaged in the first adjustment groove (34) and the wedge surface abuts against one end of the cutter clamp (32). The first adjustment screw (36) passes through the first wedge block (35) and is threadedly engaged with the cutter head (2).

2. The high-efficiency multi-blade adjustable boring tool according to claim 1, characterized in that: The adjustment unit also includes a second adjustment groove (37), a second wedge block (38), and a second adjustment screw (39). The second adjustment groove (37) is recessed on the cutter head (2) and located at the center of one side of the cutter clamp mounting groove (31). The second wedge block (38) is engaged in the second adjustment groove (37) and the wedge surface slides against the side wall of the cutter clamp (32). The second adjustment screw (39) passes through the second wedge block (38) and is threadedly engaged with the cutter head (2).

3. The high-efficiency multi-blade adjustable boring tool according to claim 1, characterized in that: The top of the blade holder (32) is inclined and has a threaded hole, and a locking screw (4) is threaded inside the threaded hole. One end of the locking screw (4) abuts against the bottom of the blade holder mounting groove (31).

4. The high-efficiency multi-blade adjustable boring tool according to claim 1, characterized in that: The milling insert (33) is made of superhard diamond with a surface hardness ≥9000HV, and the tool holder (1) is made of high-toughness quenched steel with a tensile strength ≥1500MPa.

5. The high-efficiency multi-blade adjustable boring tool according to claim 2, characterized in that: The side wall of the blade holder (32) is provided with an abutment surface (5), which is inclined and cooperates with the wedge surface of the second wedge block (38).

6. The high-efficiency multi-blade adjustable boring tool according to claim 1, characterized in that: The blade holder (1) has an injection chamber (6) at its axial center and a spray hole (7) on the blade head (2). There are multiple spray holes (7), all of which are connected to the injection chamber (6).

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