Flexible boring bar

Abstract

The utility model discloses a flexible boring bar, and belongs to the field of boring bars. According to the technical scheme, the flexible boring rod comprises a boring rod body, a plurality of tool rest supporting assemblies are arranged at intervals in the axial direction of the boring rod body, tool fixing pieces are arranged on the tool rest supporting assemblies, and tools are arranged on the tool fixing pieces. The boring bar further comprises an adjusting part used for adjusting the cutting diameter of the tool, the adjusting part comprises a base plate, and the base plate is located between the tool rest supporting assembly and the boring bar body or located between the tool fixing piece and the tool rest supporting assembly. Flexible adjustment of the cutting diameter can be achieved through the base plate, the adjusting range is increased, the application range is wider, batch production and assembly of all modules can be facilitated through split type and modular design, the overall forming efficiency of the boring rod is greatly improved, and the customized machining period of the boring rod is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of boring bars, and in particular relates to a flexible boring bar. Background Art

[0002] The wire boring bar is a must-have tool for machining spindle holes and camshaft holes in the mass production of diesel engines. Currently, most diesel engines are made of vermicular iron, which has poorer cutting performance than gray iron, but has higher strength. Conventional boring cutters have poor stability and cutting performance when machining vermicular iron. Wire boring bars have huge advantages over conventional boring cutters in terms of processing quality, production cycle, and tool life.

[0003] However, the existing boring bars have poor versatility and a long production cycle. The length of the tool bar needs to be customized according to the length of the product being processed. The adjustable range of the tool holder diameter is generally not greater than 0.2mm, and the production cycle is generally 2-4 months. In the current diesel engine market, the diameters of the spindle holes and camshaft holes of engines of the same displacement but different types generally differ by more than ten millimeters or even dozens of millimeters, and the length difference of the engine is even greater. With the increasing number of engine types and faster iterations, the shortcomings of conventional wire boring bars, such as long production cycle, high procurement cost, and poor versatility, have become increasingly prominent. Therefore, it is necessary to promote the modularization of wire boring bars. Utility Model Content

[0004] The utility model provides a flexible boring bar to solve at least one of the above technical problems.

[0005] The technical solution adopted by the utility model is:

[0006] A flexible boring bar comprises a boring bar body, a plurality of tool holder support assemblies are arranged at intervals along the axial direction of the boring bar body, a tool holder support assembly is provided on the tool holder support assembly, and a tool is provided on the tool holder;

[0007] It also includes an adjusting portion for adjusting the cutting diameter of the tool, wherein the adjusting portion includes a shim plate, and the shim plate is located between the tool holder support assembly and the boring bar body or between the tool fixing part and the tool holder support assembly.

[0008] Preferably, a plurality of the pads are provided, each of which is provided with a groove body, and the groove body is marked with the thickness value of the pad.

[0009] Preferably, a mounting groove is provided on the axial side wall of the boring bar body, a plurality of first threaded holes are arranged at intervals in the mounting groove, the tool holder support assembly is located in the mounting groove, and a first bolt cooperating with the first threaded hole is provided on the tool holder support assembly.

[0010] Preferably, the tool holder supporting assembly comprises a fixing seat, the fixing seat matches the size of the mounting slot, and first strip-shaped notches corresponding to the positions of the first threaded holes are provided on both sides of the fixing seat.

[0011] Preferably, second strip-shaped notches corresponding to the positions of the first strip-shaped notches are provided on both sides of the pad.

[0012] Preferably, a fixing groove for fixing the tool fixing member is provided on the fixing seat.

[0013] Preferably, the tool fixing member includes a tool clamp, the tool clamp matches the shape of the fixing groove, a second bolt is fixedly connected between the tool clamp and the fixing groove, a second positioning threaded hole is provided on the tool clamp, and a positioning bolt is fixedly connected between the second positioning threaded hole and the fixing groove.

[0014] Preferably, the tool holder is provided with a fixing bracket for fixing the tool, the fixing bracket and the tool have at least three abutting contact surfaces, and the tool and the fixing bracket are fixedly connected by a third bolt.

[0015] Preferably, two blade grooves are provided below the fixed bracket, and the blades on both sides of the lower end of the tool are located in the blade grooves.

[0016] Preferably, a tool handle for connecting to an external power output device is provided at the end of the boring bar body.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0018] 1. In the present application, the position of the tool holder support assembly on the boring bar body can be adjusted by a detachable setting between the boring bar body and the tool holder support assembly, so that it can adapt to different types of cutting holes, and the staff can repair, maintain or replace any one of the boring bar body and the tool holder support assembly by disassembly. The tool holder support assembly and the tool fixing member are detachable, and the staff can disassemble, repair, maintain or replace any one of the tool holder support assembly and the tool fixing member. The tool and the tool fixing member are also detachable, which is convenient for the staff to replace the tool and ensure the cutting effect of the tool. In general, each component is independent of each other, and the components are detachably connected. Each component can be replaced, repaired and maintained separately, which greatly reduces the overall use cost and maintenance cost of the boring bar. The cutting diameter of the tool can be increased or decreased by adding or reducing the pad, so that the adjustment range of the tool cutting diameter is increased and the adaptability range is wider. The tool cutting diameter can be adjusted by adjusting the number of pads used and the design thickness of the pads. Moreover, this split modular design can facilitate the mass production and assembly of each module, greatly improve the overall forming efficiency of the boring bar, and shorten the customized processing cycle of the boring bar.

[0019] 2. As a preferred embodiment of the utility model, the thickness value can be printed on the groove body to prevent the thickness value from being worn during use, which will affect the judgment of the thickness of the pad by the staff.

[0020] 3. As a preferred embodiment of the present invention, the tool holder support assembly can be limited by the setting of the installation groove. When installing the tool holder support assembly, the tool holder support assembly needs to be inserted into the installation groove, and the tool holder support assembly needs to be slid axially along the boring bar body to adjust the position of the tool. After the tool position is adjusted, the tool holder support assembly is fixed in the installation groove through the first threaded hole and the first bolt. The installation groove can effectively limit the tool holder support assembly, prevent the tool holder support assembly from shifting due to increased force during the cutting process, and improve the cutting accuracy of the tool. It is worth mentioning that the tool holder support assembly is fixed by four groups of first bolts, and the four first bolts are symmetrically distributed on both sides of the length direction of the tool holder support assembly, which further improves the stability of the installation of the tool holder support assembly.

[0021] 4. As a preferred embodiment of the utility model, the width of the fixing seat matches the width of the installation slot, and this clearance fit relationship prevents the fixing seat from being offset or deflected under the action of external force. The first notch design facilitates the installation of the first bolt through the first strip notch into the first threaded hole covered by the first strip notch, and the nut end of the first bolt abuts against and presses against the first strip notch to fix the fixing seat in the installation slot.

[0022] The second strip-shaped notch facilitates installation of the gasket, thereby increasing the operational efficiency of adding or removing gaskets.

[0023] 5. As a preferred embodiment of the present invention, the setting of the fixing groove can play a role in limiting and positioning the tool fixing part. The limiting effect of the inner wall of the fixing groove can prevent the tool fixing part from being displaced under stress, thereby ensuring the cutting accuracy of the tool.

[0024] 6. As a preferred embodiment of the utility model, by matching the shape of the tool clamp with the fixing groove, the fixing groove can play a stable limiting role on the tool clamp, and the tool clamp is fixed to the fixing groove by the second bolt to prevent the tool clamp from loosening. The loosening of the tool clamp can be further reduced by setting the second threaded hole and the positioning bolt.

[0025] 7. As a preferred embodiment of the utility model, the tool can be supported in a limited position by setting a fixed bracket. When installing the tool, the staff only needs to place the tool on the fixed bracket. The threaded hole on the tool and the threaded hole on the fixed bracket also correspond to each other. The tool and the tool holder can be fixed by a third bolt. There are at least three contact surfaces between the fixed bracket and the tool, which can make the fixed bracket have a stable limiting effect on the tool. The setting of the blade groove can prevent the two blades of the tool located under the fixed bracket from being stressed, thereby reducing the service life of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of the flexible boring bar proposed by the utility model;

[0027] Figure 2 A top view of the flexible boring bar proposed in the utility model;

[0028] Figure 3 It is a structural schematic diagram of a tool fixing part, a backing plate, and a tool fixing part in a specific implementation mode of the utility model;

[0029] Figure 4 This is a structural schematic diagram of a pad in a specific implementation manner of the utility model;

[0030] Figure 5 For this utility model Figure 1 Enlarged view of part A.

[0031] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0032] In the attached picture:

[0033] 1. Boring bar body; 101. Tool handle; 2. Mounting groove; 201. First threaded hole; 3. Fixed seat; 301. First strip-shaped slot; 302. First bolt; 303. Fixed slot; 4. Pad; 401. Second strip-shaped slot; 402. Slot body; 5. Tool holder; 501. Second bolt; 5011. Second threaded hole; 502. Fixed bracket; 5021. Blade slot; 503. Tool; 504. Third bolt. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0036] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0039] Reference Figure 1-5 A flexible boring bar comprises a boring bar body 1, a plurality of tool holder support assemblies are axially spaced apart along the boring bar body 1, a tool holder support assembly is provided with a tool fixing part, and a tool 503 is provided on the tool fixing part; the flexible boring bar also comprises an adjusting part for adjusting the cutting diameter of the tool, the adjusting part comprises a pad 4, and the pad 4 is located between the tool holder support assembly and the boring bar body 1 or between the tool fixing part and the tool holder support assembly.

[0040] It can be understood by those skilled in the art that, according to the specific parameters of the inner diameter of the axial hole to be processed, the staff installs and arranges the tool holder support assembly in sequence in the axial direction of the boring bar body 1, and then installs the tool fixing part fixed with the tool 503 on the tool holder support assembly, and adjusts the cutting diameter of the tool 503 by adding a pad 4 between the tool holder support assembly and the boring bar body 1 or between the tool fixing part and the tool holder support assembly. The position of the tool holder support assembly on the boring bar body 1 can be adjusted by the detachable setting between the boring bar body 1 and the tool holder support assembly, so that it can adapt to different types of cutting holes, and the staff can repair, maintain or replace any one of the boring bar body 1 and the tool holder support assembly separately by disassembly. The tool holder support assembly and the tool fixing part are detachable, and the staff can disassemble, repair, maintain or replace any one of the tool holder support assembly and the tool fixing part. The tool 503 and the tool fixing part are also detachable, which is convenient for the staff to replace the tool 503 and ensure the cutting effect of the tool 503. In summary, each component is independent of each other, and the components can be detachably connected. Each component can be replaced, repaired, and maintained separately, which greatly reduces the overall use cost and maintenance cost of the boring bar. By increasing or reducing the pad 4, the cutting diameter of the tool 503 can be increased or decreased, so that the adjustment range of the cutting diameter of the tool 503 is increased and the adaptability range is wider. By adjusting the number of pads 4 used and the design thickness of the pad 4, the cutting diameter of the tool 503 can be adjusted.

[0041] It is worth mentioning that a tool handle 101 for connecting to an external power output device is provided at the end of the boring bar body 1. The tool handle 101 is connected to an external motor output shaft so that the external motor drives the boring bar body 1 to rotate.

[0042] As a preferred embodiment of the present application, refer to Figure 1 and Figure 2 There are several pads 4, each of which is provided with a groove 402, and the thickness value of the pad 4 is marked in the groove 402. By printing the thickness value in the groove 402, it is possible to prevent the thickness value from being worn during use, which would affect the judgment of the thickness of the pad 4 by the staff.

[0043] As a preferred embodiment of the present application, refer to Figure 1-2 as well as Figure 5 A mounting groove 2 is provided on the axial side wall of the boring bar body 1, and a plurality of first threaded holes 201 are arranged at intervals in the mounting groove 2. The tool holder support assembly is located in the mounting groove 2, and a first bolt 302 matching the first threaded hole 201 is provided on the tool holder support assembly.

[0044] The tool holder support assembly can be limited by the setting of the installation groove 2. When installing the tool holder support assembly, the tool holder support assembly needs to be inserted into the installation groove 2, and the tool holder support assembly is axially slid along the boring bar body 1 to adjust the position of the tool 503. After the position adjustment of the tool 503 is completed, the tool holder support assembly is fixed in the installation groove 2 through the first threaded hole 201 and the first bolt 302. The installation groove 2 can effectively limit the tool holder support assembly, prevent the tool 503 from being offset due to increased force during the cutting process, and improve the cutting accuracy of the tool 503. It is worth mentioning that the tool holder support assembly is fixed by four groups of first bolts 302, and the four first bolts 302 are symmetrically distributed on both sides of the length direction of the tool holder support assembly, which further improves the stability of the installation of the tool holder support assembly.

[0045] As a specific embodiment of the tool holder support assembly, refer to Figure 3 and Figure 5 The tool holder support assembly includes a fixed seat 3, the fixed seat 3 matches the size of the installation groove 2, and first strip-shaped notches 301 corresponding to the positions of the first threaded holes 201 are provided on both sides of the fixed seat 3.

[0046] The width of the fixing seat 3 matches the width of the installation slot 2. This clearance fit relationship prevents the fixing seat 3 from being offset or deflected under the action of external force. The design of the first notch 301 facilitates the installation of the first bolt 302 through the first strip notch 301 into the first threaded hole 201 covered by the first strip notch 301. The nut end of the first bolt 302 abuts against and is pressed against the first strip notch 301 to fix the fixing seat 3 in the installation slot 2.

[0047] As a preferred embodiment of the backing plate 4, refer to Figure 3 and Figure 4 , second strip notches 401 corresponding to the positions of the first strip notches 301 are provided on both sides of the pad 4 .

[0048] The second strip-shaped notch 401 facilitates installation of the backing plate 4 and increases the efficiency of adding or removing the backing plate 4 .

[0049] As a preferred example of the fixing seat 3, refer to Figure 3 and Figure 5 A fixing groove 303 for fixing the tool fixing part is provided on the fixing seat 3. The setting of the fixing groove 303 can play a role in limiting and positioning the tool fixing part. The limiting effect of the inner wall of the fixing groove 303 can prevent the tool fixing part from being displaced under stress, thereby ensuring the cutting accuracy of the tool 503.

[0050] As a specific implementation of the tool fixing member, refer to Figure 3 and Figure 5The tool fixing part includes a tool clamp 5, the shape of the tool clamp 5 matches that of the fixing groove 303, a second bolt 501 is fixedly connected between the tool clamp 5 and the fixing groove 303, a second positioning threaded hole 5011 is provided on the tool clamp 5, and a positioning bolt is fixedly connected between the second positioning threaded hole 5011 and the fixing groove 303.

[0051] By matching the shape of the tool clamp 5 with the fixing groove 303, the fixing groove 303 can play a stable limiting role on the tool clamp 5. The tool clamp 5 is fixed to the fixing groove 303 by the second bolt 501 to prevent the tool clamp 5 from loosening. The loosening of the tool clamp 5 can be further reduced by setting the second threaded hole 5011 and the positioning bolt.

[0052] Furthermore, the tool holder 5 is provided with a fixing bracket 502 for fixing the tool 503 . The fixing bracket 502 and the tool 503 have at least three abutting contact surfaces. The tool 503 and the fixing bracket 502 are fixedly connected by a third bolt 504 .

[0053] The setting of the fixed bracket 502 can provide limited support for the tool 503. When installing the tool 503, the staff only needs to place the tool 503 on the fixed bracket 502. The threaded hole on the tool 503 and the threaded hole on the fixed bracket 502 also correspond to each other, and the tool 503 is fixed to the tool holder 5 by the third bolt 504. There are at least three contact surfaces between the fixed bracket 502 and the tool 503, so that the fixed bracket 502 can play a stable limiting effect on the tool 503.

[0054] Furthermore, two blade grooves 5021 are provided below the fixed bracket 502, and the blades on both sides of the lower end of the cutter 503 are located in the blade grooves 5021. The provision of the blade grooves 5021 can prevent the two blades of the cutter 503 located below the fixed bracket 502 from being stressed, thereby reducing the service life of the cutter 503.

[0055] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0056] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0057] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A flexible boring bar, characterized in that: It comprises a boring bar body (1), a plurality of tool holder support assemblies are arranged at intervals along the axial direction of the boring bar body (1), the tool holder support assemblies are provided with a tool fixing part, and the tool fixing part is provided with a tool (503); It also comprises an adjusting part for adjusting the cutting diameter of the tool, the adjusting part comprising a shim plate (4), the shim plate (4) being located between the tool holder support assembly and the boring bar body (1) or between the tool fixing part and the tool holder support assembly.

2. A flexible boring bar according to claim 1, characterized in that: A plurality of the pads (4) are provided, and each of the pads (4) is provided with a groove (402), wherein the groove (402) is marked with the thickness value of the pad (4).

3. A flexible boring bar according to claim 1, characterized in that: The axial side wall of the boring bar body (1) is provided with a mounting groove (2), a plurality of first threaded holes (201) are arranged at intervals in the mounting groove (2), the tool holder support assembly is located in the mounting groove (2), and a first bolt (302) that cooperates with the first threaded hole (201) is provided on the tool holder support assembly.

4. A flexible boring bar according to claim 3, characterized in that: The tool holder support assembly comprises a fixing seat (3), the fixing seat (3) matches the size of the mounting groove (2), and first strip-shaped notches (301) corresponding to the position of the first threaded hole (201) are provided on both sides of the fixing seat (3).

5. A flexible boring bar according to claim 2, characterized in that: Second strip-shaped notches (401) corresponding to the positions of the first strip-shaped notches (301) are provided on both sides of the pad (4).

6. A flexible boring bar according to claim 4, characterized in that: The fixing seat (3) is provided with a fixing groove (303) for fixing the tool fixing member.

7. A flexible boring bar according to claim 6, characterized in that: The tool fixing component comprises a tool clamp (5), the shape of the tool clamp (5) matches that of the fixing groove (303), a second bolt (501) is fixedly connected between the tool clamp (5) and the fixing groove (303), a second positioning threaded hole (5011) is provided on the tool clamp (5), and a positioning bolt is fixedly connected between the second positioning threaded hole (5011) and the fixing groove (303).

8. A flexible boring bar according to claim 7, characterized in that: The tool holder (5) is provided with a fixing bracket (502) for fixing the tool (503); the fixing bracket (502) and the tool (503) have at least three abutting contact surfaces; the tool (503) and the fixing bracket (502) are fixedly connected via a third bolt (504).

9. A flexible boring bar according to claim 8, characterized in that: Two blade grooves (5021) are provided below the fixed bracket (502), and the blades on both sides of the lower end of the knife (503) are located in the blade grooves (5021).

10. A flexible boring bar according to any one of claims 1 to 9, characterized in that: The end of the boring bar body (1) is provided with a tool handle (101) for connecting to an external power output device.

Images