Improved floating boring cutter

Abstract

The utility model relates to the technical field of machining, in particular to an improved floating boring cutter which mainly solves the technical problems that an existing floating boring cutter cannot meet the requirements that a blade can be replaced independently, a rubber rod is arranged, and the adjustable size range is large at the same time. The boring cutter comprises a first cutter body, a second cutter body, a third cutter body and a fourth cutter body, the first cutter body is correspondingly fixed above one end of the second cutter body, a first rubber rod assembly is arranged between the first cutter body and the second cutter body, the third cutter body is correspondingly fixed below one end of the fourth cutter body, and a second rubber rod assembly is arranged between the third cutter body and the fourth cutter body. The fourth cutter body is provided with a strip-shaped hole, a locking screw is arranged in the strip-shaped hole and is screwed and fixed on the second cutter body, and the first cutter body and the third cutter body are provided with mounting areas. According to the structure, detachable installation of the blade can be achieved through the installation area, the cutter body can be supported through the rubber rod assembly when the boring cutter works, and meanwhile the length of the cutter body can be adjusted through cooperation of the locking screw and the strip-shaped hole.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to an improved floating boring tool. Background Art

[0002] A floating boring tool is a structure in which the tool body is inserted into the tool bar and can float. The floating boring tool is mainly used to eliminate the machining allowance of the inner hole.

[0003] There are mainly two structures for the existing floating boring tools: the first one is as Figures 1 - 2 shown. This structure has a relatively large adjustable size range, but the alloy blade is welded on the tool body. After the blade is passivated, it needs to be sharpened, which tests the sharpening level of the workers. And after being sharpened to a certain extent, it is scrapped together with the tool body, and the cost is relatively high; the second one is as Figures 3 - 4 shown. In this structure, the blade is fixed on the tool body by screws. After the blade is passivated, it can be independently replaced. And rubber rods are arranged at both ends of the tool body. The rubber rods extend out and abut against the inner hole during the boring operation of the boring tool, which can provide a supporting effect for the whole tool body and can better ensure the machining quality. However, due to the setting of the two rubber rods, the adjustable size range of the whole blade is relatively small. Therefore, there is an urgent need for a floating boring tool structure in which the blade can be independently replaced, is provided with rubber rods and has a relatively large adjustable size range. Summary of the Utility Model

[0004] To overcome the technical defects that the existing floating boring tools cannot simultaneously meet the requirements that the blade can be independently replaced, is provided with rubber rods and has a relatively large adjustable size range, the utility model provides an improved floating boring tool.

[0005] The improved floating boring tool provided by the utility model includes a first tool body, a second tool body, a third tool body and a fourth tool body. The first tool body is correspondingly fixed above one end of the second tool body. A first rubber rod assembly is arranged between the first tool body and the second tool body. The third tool body is correspondingly fixed below one end of the fourth tool body. A second rubber rod assembly is arranged between the third tool body and the fourth tool body. The fourth tool body is provided with a strip-shaped hole arranged along its length direction. At least one locking screw is arranged in the strip-shaped hole and the locking screw is fixed on the second tool body. The first tool body and the third tool body are provided with installation areas for detachably fixing the blade.

[0006] Optionally, the first tool body and the second tool body are positioned by a first key and fixed together by a first connecting screw.

[0007] Optionally, the third tool body and the fourth tool body are positioned by a second key and fixed together by a second connecting screw.

[0008] Optionally, both the first rubber rod assembly and the second rubber rod assembly include:

[0009] A rubber rod body is inserted into the hole formed by splicing the first cutter body and the second cutter body or the hole formed by splicing the third cutter body and the fourth cutter body;

[0010] A compression screw is screwed on the second cutter body or the fourth cutter body and used to compress the rubber rod body;

[0011] A first set screw is screwed on the first cutter body or the third cutter body along an inclined direction and contacts the inner end of the rubber rod body. The first set screw is used to push the inner end of the rubber rod body outwards.

[0012] Optionally, a second set screw is provided between the second cutter body and the third cutter body.

[0013] The technical solution provided by the present utility model has the following advantages compared with the prior art:

[0014] The improved floating boring tool provided by the present utility model divides the cutter body into four parts. A first rubber rod assembly is arranged between the first cutter body and the second cutter body at one end, and a second rubber rod assembly is arranged between the third cutter body and the fourth cutter body at the other end. The second cutter body and the fourth cutter body are connected by a locking screw and a strip hole in cooperation. The first cutter body and the third cutter body are provided with installation areas for installing blades. This structure can realize the detachable installation of the blades through the installation areas, support the cutter body during the boring operation through the first rubber rod assembly and the second rubber rod assembly, and at the same time, the length of the cutter body can be adjusted through the cooperation of the locking screw and the strip hole, so as to be applicable to the machining of internal holes with various different diameters. Description of the Drawings

[0015] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with the present utility model, and are used together with the specification to explain the principles of the present utility model.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0017] Figure 1 Shows the top view of the first existing floating boring tool;

[0018] Figure 2 Shows Figure 1 The cross-sectional view taken along A-A in

[0019] Figure 3 Shows the top view of the second existing floating boring tool;

[0020] Figure 4 Shows Figure 3Cross-sectional view at A-A;

[0021] Figure 5 Shows the top view of the floating boring tool in the embodiment of the present utility model;

[0022] Figure 6 Indicates Figure 5 Cross-sectional view at A-A;

[0023] Figure 7 Shows the top view of the first tool body in the embodiment of the present utility model;

[0024] Figure 8 Indicates Figure 7 Cross-sectional view at A-A;

[0025] Figure 9 Shows the top view of the second tool body in the embodiment of the present utility model;

[0026] Figure 10 Indicates Figure 9 Cross-sectional view at A-A;

[0027] Figure 11 Shows the top view of the third tool body in the embodiment of the present utility model;

[0028] Figure 12 Indicates Figure 11 Cross-sectional view at A-A;

[0029] Figure 13 Indicates Figure 11 Cross-sectional view at B-B;

[0030] Figure 14 Shows the top view of the fourth tool body in the embodiment of the present utility model;

[0031] Figure 15 Indicates Figure 14 Cross-sectional view at A-A;

[0032] Figure 16 Indicates Figure 14 Cross-sectional view at B-B.

[0033] In the figure:

[0034] 1. First tool body; 2. Second tool body; 3. Third tool body; 4. Fourth tool body; 5. First rubber rod assembly; 6. Second rubber rod assembly; 7. Strip-shaped hole; 8. Locking screw; 9. Installation area; 10. First key; 11. First connecting screw; 12. Second key; 13. Second connecting screw; 14. Rubber rod body; 15. Compression screw; 16. First set screw; 17. Second set screw. Detailed implementation method

[0035] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the solution of the present utility model will be further described below. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0036] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. It should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" 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 or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0037] In the following description, many specific details are set forth in order to fully understand the present utility model, but the present utility model can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0038] The following Figures 5 to 16 will be used to detail the specific embodiments of the present utility model.

[0039] This embodiment provides an improved floating boring tool, which includes a first tool body 1, a second tool body 2, a third tool body 3 and a fourth tool body 4. The first tool body 1 is correspondingly fixed above one end of the second tool body 2. A first rubber rod assembly 5 is provided between the first tool body 1 and the second tool body 2. The third tool body 3 is correspondingly fixed below one end of the fourth tool body 4. A second rubber rod assembly 6 is provided between the third tool body 3 and the fourth tool body 4. The fourth tool body 4 is provided with a strip-shaped hole 7 arranged along its length direction. At least one locking screw 8 is arranged in the strip-shaped hole 7 and the locking screw 8 is screwed and fixed on the second tool body 2. The first tool body 1 and the third tool body 3 are provided with installation areas 9 for detachably fixing the cutting blades.

[0040] It should be noted that in order to more clearly show the positions of each component, the positions of the components in the figure adopt the same reference numerals as the components. For example, the keyway and the corresponding key adopt the same reference numerals.

[0041] Specifically, the first tool body 1 and the second tool body 2 are positioned by a first key 10 and fixed together by a first connecting screw 11.

[0042] Specifically, the third tool body 3 and the fourth tool body 4 are positioned by a second key 12 and fixed together by a second connecting screw 13.

[0043] Specifically, both the first rubber rod assembly 5 and the second rubber rod assembly 6 include a rubber rod body 14, a compression screw 15, and a first set screw 16. The rubber rod body 14 is inserted into the hole formed by splicing the first cutter body 1 and the second cutter body 2 or the hole formed by splicing the third cutter body 3 and the fourth cutter body 4. The compression screw 15 is screwed onto the second cutter body 2 or the fourth cutter body 4 and is used to compress the rubber rod body 14. The first set screw 16 is screwed onto the first cutter body 1 or the third cutter body 3 along an inclined direction and contacts the inner end of the rubber rod body 14. The first set screw 16 is used to push the inner end of the rubber rod body 14 outwards. During use, first loosen the compression screw 15, and gradually push the rubber rod body 14 outwards through the first set screw 16 until it can contact the inner hole wall, and then tighten the compression screw 15 to fix the rubber rod body 14 relative to the cutter body.

[0044] Further, a second set screw 17 is provided between the second cutter body 2 and the third cutter body 3.

[0045] It should be noted that for the existing second type of floating boring tool, in the diameter direction, when the machining diameter exceeds φ300mm, due to the cutting depth, the upper and lower cutter bodies will retract, and the expected diameter cannot be achieved after machining. To overcome the above defects in this embodiment, a second set screw 17 is added. The second set screw 17 can maintain the distance between the second cutter body 2 and the third cutter body 3, thereby avoiding the situation where the diameter after machining cannot reach the expected value due to the retraction of the cutter body.

[0046] The working process of the improved floating boring tool in this embodiment is as follows:

[0047] S1. Fix the first cutter body 1 and the second cutter body 2 together with the first connecting screw and the first key 10, and install the first rubber rod assembly 5 to form a new combination.

[0048] S2. Fix the third cutter body 3 and the fourth cutter body 4 together with the second connecting screw and the second key 12, and install the second rubber rod assembly 6 to form a new combination.

[0049] S3. Assemble the two new combinations together with the locking screw 8 and the second set screw 17.

[0050] S4. Install the indexable insert, and adjust the length of the cutter body to fit the inner hole to be machined through the locking screw 8 and the second set screw 17.

[0051] S5. Insert the whole cutter body into the tool bar, and adjust the extension amount of the rubber rod body 14 through the first set screw 16 so that the rubber rod body 14 supports the cutter body.

[0052] S6. Rotate the tool bar to perform boring machining.

[0053] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Although the foregoing embodiments have been described in detail, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. An improved floating boring tool, characterized in that, It includes a first cutter body (1), a second cutter body (2), a third cutter body (3) and a fourth cutter body (4). The first cutter body (1) is correspondingly fixed above one end of the second cutter body (2). A first rubber rod assembly (5) is provided between the first cutter body (1) and the second cutter body (2). The third cutter body (3) is correspondingly fixed below one end of the fourth cutter body (4). A second rubber rod assembly (6) is provided between the third cutter body (3) and the fourth cutter body (4). The fourth cutter body (4) is provided with a strip-shaped hole (7) arranged along its length direction. At least one locking screw (8) is provided in the strip-shaped hole (7) and the locking screw (8) is screwed and fixed on the second cutter body (2). The first cutter body (1) and the third cutter body (3) are provided with installation areas (9) for detachably fixing blades.

2. The improved floating boring tool according to claim 1, characterized in that, The first cutter body (1) and the second cutter body (2) are positioned by a first key (10) and screwed and fixed together by a first connecting screw (11).

3. The improved floating boring tool according to claim 1, characterized in that, The third cutter body (3) and the fourth cutter body (4) are positioned by a second key (12) and screwed and fixed together by a second connecting screw (13).

4. The improved floating boring tool according to claim 1, characterized in that, Both the first rubber rod assembly (5) and the second rubber rod assembly (6) include: A rubber rod body (14) which is inserted into a hole formed by splicing the first cutter body (1) and the second cutter body (2) or a hole formed by splicing the third cutter body (3) and the fourth cutter body (4); A pressing screw (15) which is screwed on the second cutter body (2) or the fourth cutter body (4) and is used for pressing the rubber rod body (14); A first set screw (16) which is screwed on the first cutter body (1) or the third cutter body (3) along an inclined direction and contacts the inner end of the rubber rod body (14). The first set screw (16) is used for pushing the inner end of the rubber rod body (14) outwards.

5. The improved floating boring tool according to any one of claims 1 to 4, characterized in that, A second set screw (17) is provided between the second cutter body (2) and the third cutter body (3).

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