Boring cutter capable of adjusting length of boring bar

Abstract

The utility model discloses a boring cutter capable of adjusting the length of a boring bar, which comprises a support bar, a butt joint bar, a fixed cylinder, a boring cutter and a length adjusting mechanism, the butt joint bar is connected to two ends of the support bar, the fixed cylinder is fixed on the butt joint bar, the boring cutter is connected in the fixed cylinder, the support bar is fixed on one side of the length adjusting mechanism, and the length adjusting mechanism is fixed on the support bar. The length adjusting mechanism comprises a supporting plate, a bearing plate, a connecting block and a transverse linkage plate. The boring cutter is arranged to mill a workpiece, and during milling, a worm in the length adjusting mechanism drives a worm gear to rotate so as to drive the transverse linkage plates to rotate and further drive the multiple transverse linkage plates to synchronously link, so that the feeding operation of the boring cutter is realized, and during feeding, the boring cutter can be driven to rotate synchronously, and meanwhile, the boring cutter can be driven to rotate synchronously. The vertical linkage plates are integrally and synchronously linked, the supporting effect of the boring cutter on the vertical structure is achieved, and the situation that vibration is generated due to the fact that the boring cutter only has supporting force in one direction when the boring cutter is fed is effectively avoided.

Description

Technical Field

[0001] This utility model relates to a boring tool, specifically a boring tool with adjustable boring bar length, belonging to the field of boring tool technology. Background Technology

[0002] A boring tool is a type of boring tool that is an indispensable tool in precision hole machining. It is mainly used for internal hole machining, hole enlargement, and contouring. A boring tool has one or two cutting parts and is a tool specifically designed for roughing, semi-finishing, or finishing existing holes.

[0003] However, most existing boring tools have various problems. For example, in a bidirectional adjustable CNC composite boring tool disclosed in publication number CN103551608A, although it can realize bidirectional movement of the boring tool row in both the axial and radial directions, simplifying the machining process and improving machining efficiency, for some workpieces that need to be machined with hole grooves, the boring tool needs to feed within a large range of the workpiece. Therefore, it is necessary to adjust the length of the boring bar. At present, the boring bar structure of boring tools is diverse. For example, for the boring bar structure composed of cross linkage rods, most of them only set the cross linkage structure in one plane. Although this can also realize the feeding operation of the boring tool, its stability is seriously insufficient. It is easy to produce slight shaking during milling, which seriously affects the milling accuracy of the boring tool. Utility Model Content

[0004] This utility model addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the purpose of this utility model is to overcome the aforementioned shortcomings in existing technologies by proposing a boring bar that can adjust the length of the boring bar.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a boring bar with adjustable length, comprising a support rod, a connecting rod, a fixed cylinder, a boring bar and a length adjustment mechanism, wherein the connecting rod is connected to both ends of the support rod, the fixed cylinder is fixed on the connecting rod, and the boring bar is connected inside the fixed cylinder;

[0006] The support rod is fixed to one side of the length adjustment mechanism, and the length adjustment mechanism includes a support plate, a support plate, a connecting block and a transverse linkage plate. The support plate is fixed on the external machine tool, the support plate is fixed on the support plate, and multiple connecting blocks are provided. One end of the transverse linkage plate is rotatably connected to the connecting block, and the other ends of the transverse linkage plates on two adjacent connecting blocks are rotatably connected to each other, and one end of one of the transverse linkage plates is rotatably connected to the support plate.

[0007] Preferably, the length adjustment mechanism further includes a driven rod and a vertical linkage plate. Multiple driven rods are provided, and the multiple driven rods are rotatably connected to the support plate and the connecting block, respectively. One end of the vertical linkage plate is rotatably connected to the driven rod, and the vertical linkage plates on two adjacent driven rods are rotatably connected to each other.

[0008] Preferably, the length adjustment mechanism further includes a worm gear, a worm, and a servo motor. The worm gear is coaxially fixed on the transverse linkage plate and connected to one end of the support plate. The worm is rotatably connected to the support plate and meshes with the worm gear. The servo motor is fixed on one side of the support plate and is coaxially fixed with the worm.

[0009] Preferably, there are two sets of vertical linkage plates, and the overall structure formed by the two sets of vertical linkage plates is symmetrically arranged on both sides of the horizontal linkage plate.

[0010] Preferably, the connecting rod is slidably connected in the internal cavity of the support rod, and the connecting rod is connected and locked to the support rod by screws.

[0011] Preferably, one end of the fixed cylinder is provided with a cylindrical cavity, the boring tool is inserted into the cavity, and is detachably connected to the fixed cylinder by screws.

[0012] The beneficial effects of this utility model are as follows: By setting a boring bar to mill the workpiece, and during milling, the worm gear in the length adjustment mechanism drives the worm wheel to rotate, which in turn drives the horizontal linkage plate to rotate, thereby driving multiple horizontal linkage plates to move synchronously, thus realizing the feeding operation of the boring bar. At the same time as feeding, the vertical linkage plate moves synchronously as a whole, realizing the support effect of the boring bar on the vertical structure, effectively avoiding the vibration of the boring bar during feeding due to the support force in only one direction, and thus effectively improving the machining accuracy of the boring bar. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the length adjustment mechanism and its connection structure of the present invention;

[0015] Figure 3 This is a schematic diagram of the connection structure between the horizontal linkage plate and the vertical linkage plate of this utility model;

[0016] Figure 4 This is a schematic diagram of the support rod and its overall connection structure of the present invention.

[0017] In the diagram: 1. Support rod, 2. Connecting rod, 3. Fixed cylinder, 4. Boring tool, 5. Length adjustment mechanism, 51. Support plate, 52. Support plate, 53. Connecting block, 54. Horizontal linkage plate, 55. Driven rod, 56. Vertical linkage plate, 57. Worm gear, 58. Worm, 59. Servo motor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example 1, as Figures 1 to 4 As shown, a boring bar with adjustable length includes a support rod 1, a connecting rod 2, a fixed cylinder 3, a boring bar 4, and a length adjustment mechanism 5. The connecting rod 2 is connected to both ends of the support rod 1, the fixed cylinder 3 is fixed on the connecting rod 2, and the boring bar 4 is connected inside the fixed cylinder 3.

[0020] The support rod 1 is fixed to one side of the length adjustment mechanism 5, and the length adjustment mechanism 5 includes a support plate 51, a support plate 52, a connecting block 53 and a transverse linkage plate 54. The support plate 51 is fixed on the external machine tool, the support plate 52 is fixed on the support plate 51, and multiple connecting blocks 53 are provided. One end of the transverse linkage plate 54 is rotatably connected to the connecting block 53, and the other ends of the transverse linkage plates 54 on two adjacent connecting blocks 53 are rotatably connected to each other, and one end of one of the transverse linkage plates 54 is rotatably connected to the support plate 52.

[0021] The length adjustment mechanism 5 also includes a driven rod 55 and a vertical linkage plate 56. Multiple driven rods 55 are provided, and the multiple driven rods 55 are rotatably connected to the support plate 52 and the connecting block 53 respectively. One end of the vertical linkage plate 56 is rotatably connected to the driven rod 55, and the vertical linkage plates 56 on two adjacent driven rods 55 are rotatably connected to each other.

[0022] The length adjustment mechanism 5 also includes a worm gear 57, a worm 58 and a servo motor 59. The worm gear 57 is coaxially fixed on the transverse linkage plate 54 and connected to one end of the support plate 52. The worm 58 is rotatably connected to the support plate 51 and meshes with the worm gear 57. The servo motor 59 is fixed on one side of the support plate 51 and is coaxially fixed with the worm 58.

[0023] In this invention, a boring bar 4 is used to mill the workpiece. During milling, the worm gear 58 in the length adjustment mechanism 5 drives the worm wheel 57 to rotate, which in turn drives the horizontal linkage plate 54 to rotate. This, in turn, drives multiple horizontal linkage plates 54 to move synchronously, thereby realizing the feeding operation of the boring bar 4. At the same time as feeding, the vertical linkage plate 56 moves synchronously as a whole, realizing the support effect of the boring bar 4 in the vertical structure. This effectively avoids the vibration of the boring bar 4 due to the support force in only one direction during feeding, thereby effectively improving the machining accuracy of the boring bar 4.

[0024] Example 2, as Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0025] Two sets of vertical linkage plates 56 are provided, and the overall structure formed by the two sets of vertical linkage plates 56 is symmetrically arranged on both sides of the horizontal linkage plate 54, so that the two sides of the vertical linkage plates 56 can form stable support.

[0026] The docking rod 2 is slidably connected in the internal cavity of the support rod 1, and the docking rod 2 is connected and locked to the support rod 1 by screws. The distance between the docking rod 2 and the support rod 1 can be adjusted by screws, thereby realizing the adjustment of the distance between two adjacent boring tools 4.

[0027] One end of the fixed cylinder 3 is provided with a cylindrical cavity, the boring bar 4 is inserted into the cavity and is detachably connected to the fixed cylinder 3 by screws, so that the boring bar 4 can be quickly assembled and disassembled.

[0028] When using this boring bar, first adjust the length of the connecting rod 2 according to the actual usage requirements until the two adjacent boring bars 4 are adjusted to an appropriate distance. Then, the boring bar 4 abuts against the high-speed rotating workpiece to perform milling operations on the workpiece. During milling, the servo motor 59 drives the worm gear 58 to rotate, which in turn drives the worm wheel 57 to rotate, which in turn drives the horizontal linkage plate 54 to rotate. This causes multiple horizontal linkage plates 54 to move synchronously, thereby achieving the feeding operation of the boring bar 4. At the same time as feeding, the vertical linkage plate 56 moves synchronously as a whole to achieve the support effect of the boring bar 4 on the vertical structure.

[0029] 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 boring bar with adjustable length, comprising a support rod (1), a connecting rod (2), a fixing cylinder (3), a boring bar (4), and a length adjustment mechanism (5), characterized in that, The docking rod (2) is connected to both ends of the support rod (1), the fixing cylinder (3) is fixed on the docking rod (2), and the boring tool (4) is connected inside the fixing cylinder (3); The support rod (1) is fixed on one side of the length adjustment mechanism (5), and the length adjustment mechanism (5) includes a support plate (51), a support plate (52), a connecting block (53) and a transverse linkage plate (54). The support plate (51) is fixed on an external machine tool, the support plate (52) is fixed on the support plate (51), and multiple connecting blocks (53) are provided. One end of the transverse linkage plate (54) is rotatably connected to the connecting block (53), and the other ends of the transverse linkage plates (54) on two adjacent connecting blocks (53) are rotatably connected to each other, and one end of one of the transverse linkage plates (54) is rotatably connected to the support plate (52).

2. The boring tool according to claim 1, characterized in that: The length adjustment mechanism (5) further includes a driven rod (55) and a vertical linkage plate (56). There are multiple driven rods (55), and the multiple driven rods (55) are rotatably connected to the support plate (52) and the connecting block (53) respectively. One end of the vertical linkage plate (56) is rotatably connected to the driven rod (55), and the vertical linkage plates (56) on two adjacent driven rods (55) are rotatably connected to each other.

3. The boring tool according to claim 1, characterized in that: The length adjustment mechanism (5) further includes a worm gear (57), a worm (58) and a servo motor (59). The worm gear (57) is coaxially fixed on the transverse linkage plate (54) and connected to one end of the support plate (52). The worm (58) is rotatably connected to the support plate (51) and meshes with the worm gear (57). The servo motor (59) is fixed on one side of the support plate (51) and is coaxially fixed with the worm (58).

4. The boring tool according to claim 2, characterized in that: The vertical linkage plate (56) is provided in two sets, and the overall structure formed by the two sets of vertical linkage plates (56) is symmetrically arranged on both sides of the horizontal linkage plate (54).

5. The boring tool according to claim 1, characterized in that: The docking rod (2) is slidably connected in the internal cavity of the support rod (1), and the docking rod (2) is connected and locked to the support rod (1) by screws.

6. The boring tool according to claim 1, characterized in that: One end of the fixed cylinder (3) is provided with a cylindrical cavity, and the boring tool (4) is inserted into the cavity and is detachably connected to the fixed cylinder (3) by screws.

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