Adjustable boring tool

Abstract

The present invention belongs to the technical field of stepped hole boring tools, and particularly relates to an adjustable boring tool, comprising a tool body, a tool head and a plurality of guide blocks. A movable core shaft is arranged in the tool body, and the tool head and the guide blocks can be driven to move outward synchronously through the movement of the core shaft. The tool head and the guide blocks are respectively provided with elastic limiters for limiting their outward movement, and the tool head and the guide blocks are stably fixed at a predetermined movement position through the elastic limiter and the core shaft. At least one limiting long strip hole is arranged on the tool body, and a clamp is correspondingly arranged on the core shaft, and the clamp can move in the limiting long strip hole. A fixing mechanism is arranged on the tool body, and the fixing mechanism can stably fix the clamp at the predetermined movement position. The sizes of the tool and the guide blocks can be synchronously and arbitrarily adjusted within a certain range, so that the tool has a wider application range, is easy to operate and adjust, and has relatively high precision and stability. In addition, the tool is particularly suitable for processing the inner cavity hole of a large belly, and the operation process is simple, the frequency of manual operation is reduced, and the processing efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of step hole boring cutters, and particularly relates to an adjustable boring cutter. Background Art

[0002] At present, most boring tools are fixed, and the tool size and guide block size cannot be adjusted. Some boring tools are fine-adjustable, and their application range is relatively small. The existing adjustable boring tools have a complex structure, are not easy to adjust, and their accuracy needs to be improved.

[0003] In addition, the processing of large-bellied (i.e., small apertures at both ends and large apertures in the middle) inner cavity holes, especially the processing of inner cavity holes with a certain depth, has always been a difficult problem in the industry. Due to the certain depth, it is not suitable for ordinary lathe processing, and due to the small apertures at both ends, ordinary fixed boring tools cannot enter. How to develop a boring tool suitable for processing large-bellied inner cavity holes is our research and development direction. Summary of the invention

[0004] The present invention provides an adjustable boring tool, which can solve the problems pointed out in the background technology.

[0005] An adjustable boring tool comprises a tool body, a tool head and a plurality of guide blocks. A movable core shaft is provided in the tool body, and the tool head and the guide blocks can be driven to move outward synchronously through the movement of the core shaft. The tool head and the guide blocks are respectively provided with elastic limiters for limiting their outward movement. The tool head and the guide blocks are stably fixed in a predetermined movement position through the elastic limiters and the core shaft. At least one limiting long strip hole is provided in the tool body, and a clamp is correspondingly provided on the core shaft. The clamp can move in the limiting long strip hole. A fixing mechanism is provided on the tool body, and the fixing mechanism can stably fix the clamp in a predetermined movement position.

[0006] Preferably, the tool head includes a tool seat and a tool, the tool seat is movably arranged in the tool body mounting groove of the tool body, the inner side of the tool seat is a bevel structure, and a first bevel body matching the bevel of the tool seat is provided at the corresponding position of the core shaft, and the first bevel body presses the tool seat to move outward through the movement of the core shaft.

[0007] Preferably, the elastic limiting member is a limiting spring, a first spring mounting groove is provided at a corresponding position of the knife body, a limiting groove for the limiting spring to pass through is provided at a corresponding position of the knife seat, the limiting spring surrounds the knife body and is fixed on the first spring mounting groove, and the knife seat is limited and fixed by the limiting groove.

[0008] Preferably, the guide block is movably arranged in the guide block mounting groove of the knife body, the inner side of the guide block is a bevel structure, and a second bevel body matching the bevel of the guide block is provided at the corresponding position of the core shaft, and the second bevel body presses the guide block to move outward through the movement of the core shaft.

[0009] Preferably, the elastic limiting member is a limiting spring, a second spring mounting groove is provided at a corresponding position of the knife body, a limiting hole for the limiting spring to pass through is provided at a corresponding position of the guide block, the limiting spring surrounds the knife body and is installed on the second spring mounting groove, and several guide blocks are limited and fixed through the limiting holes.

[0010] Preferably, the fixing mechanism comprises at least one adjusting nut and a positioning nut, the clamping member is a clamping column, which is located between the adjusting nut and the positioning nut, and the knife body is provided with a threaded portion cooperating with the nut.

[0011] Preferably, the fixing mechanism includes two adjusting nuts, namely a first adjusting nut and a second adjusting nut, the first adjusting nut and the second adjusting nut are respectively located on both sides of the clamp, and the positioning nut is located on the outside of the second adjusting nut, close to one side of the guide block.

[0012] Preferably, a clamping member groove is provided on the side of the first adjusting nut and the second adjusting nut contacting the clamping member.

[0013] Beneficial effects: The present invention is an adjustable boring tool, the sizes of the tool and the guide block can be adjusted synchronously and arbitrarily within a certain range, so that it has a wider range of applications and is easy to operate and adjust, with relatively high precision and stability. In addition, the present invention is particularly suitable for processing the inner cavity holes of big bellies, and the operation process is relatively simple, reducing the frequency of manual operations and having very high processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention,

[0015] Figure 2 For the present invention Figure 1 -A enlarged schematic diagram,

[0016] Figure 3 For the present invention Figure 1 - Enlarged schematic diagram at B,

[0017] Figure 4 It is a three-dimensional schematic diagram of the present invention,

[0018] Figure 5 It is a main schematic diagram of the present invention,

[0019] Description of reference numerals:

[0020] Numbers in the figure: blade body 1; blade body mounting groove 11; guide block mounting groove 12; blade head 2; blade seat 21; tool 22; limiting groove 23; guide block 3; limiting hole 31; core shaft 4; first bevel body 41; second bevel body 42; elastic limiting member 5; clamping member 6; limiting long strip hole 7; first spring mounting groove 8; second spring mounting groove 9; clamping member groove 10; first adjusting nut 61; second adjusting nut 62; positioning nut 63; threaded portion 64. DETAILED DESCRIPTION

[0021] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0022] Embodiment 1:

[0023] like Figure 1-5 As shown, an adjustable boring tool provided by an embodiment of the present invention includes a tool body 1, a tool head 2 and a plurality of guide blocks 3, the sizes of the plurality of guide blocks 3 and the tool head 2 should be consistent, a movable mandrel 4 is provided in the tool body 1, and the movement of the mandrel 4 can drive the tool head 2 and the guide block 3 to move outward synchronously, so that their sizes can change synchronously and maintain consistency, and the tool head 2 and the guide block 3 are respectively provided with elastic limiters 5 for limiting their outward movement, and the tool head 2 and the guide block 3 are stably fixed at a predetermined movement position by the elastic limiter 5 and the mandrel 4.

[0024] Specifically: Special combination Figure 1 , Figure 2 , Figure 4 The cutter head 2 includes a cutter seat 21 and a cutter 22, the cutter 22 is fixed on the cutter seat 21, the cutter seat 21 is movably arranged in the cutter body mounting groove 11 of the cutter body 1, the inner side of the cutter seat 21 (the side in contact with the mandrel) is a slope structure, and the corresponding position of the mandrel 4 is provided with a first slope body 41 that matches the slope of the cutter seat 21, and the first slope body 41 presses the cutter seat 21 to move outward through the movement of the mandrel 4; the elastic limiter 5 is a limit spring, and the number of limit springs can be set according to the length of the cutter body 1 and the installation stability, so as to ensure that the limit spring can firmly fix the cutter head 2, a first spring mounting groove 8 is opened at the corresponding position of the cutter body 1, and a limit groove 23 for the limit spring to pass through is provided at the corresponding position of the cutter seat 21, the limit spring surrounds the cutter body 1 (after surrounding the first spring mounting groove, the two ends of the spring are hooked together) and is fixed on the first spring mounting groove 8, and the cutter seat 21 is limited and fixed by the limit groove 23;

[0025] Special combination Figure 2 , Figure 4The guide block 3 is movably arranged in the guide block installation groove 12 of the knife body 1. The inner side of the guide block 3 is a bevel structure. The corresponding position of the core shaft 4 is provided with a second bevel body 42 which matches the bevel of the guide block 3. Through the movement of the core shaft 4, the second bevel body 42 presses the guide block 3 to move outward; a second spring installation groove 9 is opened at the corresponding position of the knife body 1, and a limiting hole 31 for a limiting spring to pass through is provided at the corresponding position of the guide block 3. The limiting spring surrounds the knife body 1 and is installed on the second spring installation groove 9, and a plurality of guide blocks 3 are limited and fixed through the limiting holes 31;

[0026] Through the movement of the core shaft 4, the first bevel body 41 cooperates with the bevel of the tool holder 21, and the second bevel body 42 cooperates with the bevel of the guide block 3, so that the tool head 2 and the guide block 3 can move synchronously, and their sizes can be arbitrarily adjusted within a certain range.

[0027] Special combination Figure 1 , Figure 3 , Figure 4 , at least one limiting long strip hole 7 is provided on the knife body 1, and a clamp 6 is correspondingly provided on the mandrel 4. In order to ensure stability, there are two clamps 6, which are symmetrically arranged on both sides of the mandrel 4. The number and position of the limiting long strip holes 7 match the clamp 6, and the clamp 6 can move in the limiting long strip hole 7. A fixing mechanism is provided on the knife body 1, and the fixing mechanism can stably fix the clamp 6 in a predetermined movement position. The fixing mechanism includes at least one adjusting nut and a positioning nut 63. The clamp 6 is a clamping column, which is located between the adjusting nut and the positioning nut 63. The knife body 1 is provided with a threaded portion 64 that cooperates with the nut. After the clamp 6 is limited and fixed by the adjusting nut and the positioning nut 63, the mandrel 4 can be stabilized in this position to stabilize the first bevel body 41 and the second bevel body 42, and the cutter head 2 is stabilized in the desired position under the joint action of the first bevel body 41 and the limiting spring, and the guide block 3 is stabilized in the desired position under the joint action of the second bevel body 42 and the limiting spring, so that it can work stably, with high precision and easy operation.

[0028] Through the above structure, the sizes of the tool and the guide block can be adjusted synchronously and arbitrarily within a certain range, so that the application range is wider, the operation and adjustment are convenient, and the accuracy and stability are relatively high.

[0029] Embodiment 2:

[0030] Based on Example 1, in order to facilitate adjustment and reduce repeated positioning, Figure 3 , Figure 4 , Figure 5The fixing mechanism includes two adjusting nuts, namely a first adjusting nut 61 and a second adjusting nut 62. The first adjusting nut 61 and the second adjusting nut 62 are respectively located on both sides of the clamp 6. The positioning nut 63 is located on the outside of the second adjusting nut 62, close to the side of the guide block 3. The use of two adjusting nuts can reduce repeated positioning operations. The principle is that when two nuts are used, the first adjusting nut 61 and the second adjusting nut 62 are the clamping nuts of the clamp 6. The clamp 6 is limited and fixed by the first adjusting nut 61 and the second adjusting nut 62. The positioning nut 63 is a size positioning nut, that is, a positioning nut of the final size of the boring. According to the measurement, the positioning nut 63 is adjusted to the final boring size. The first adjusting nut 61 The second adjusting nut 62 limits and fixes the clamp 6 at the processing size each time. Compared with a single adjusting nut, it is only necessary to adjust the position of the first adjusting nut 61 and the second adjusting nut 62 each time, and the final size of the cutter head 2 does not need to be repeatedly positioned and adjusted. In addition, after the workpiece is processed, it is necessary to drive the core shaft 4 to move through the second adjusting nut 62, and under the action of the limit spring, the cutter head 2 is recovered to facilitate retraction. After the cutter head 2 is withdrawn, the core shaft 4 is driven back by the first adjusting nut 61 to stabilize the cutter head 2 at the processing size. If a single adjusting nut is used, only the positioning nut 63 can be used to drive the core shaft 4 to move. When processing the next workpiece, the positioning nut 63 needs to be repeatedly positioned, which will inevitably affect the processing efficiency and processing accuracy.

[0031] Special combination Figure 3 A clamping groove 10 is provided on the side where the first adjusting nut 61 and the second adjusting nut 62 contact the clamping member 6. The clamping grooves 10 on both sides can better fix the clamping member 6 to ensure that the cutter head 2 and the guide block 3 are in a stable state during processing.

[0032] The working principle of the present invention is as follows: during processing, the positioning nut 63, the second adjusting nut 62 and the first adjusting nut 61 are adjusted respectively, and the core shaft 4 is driven to move toward the side of the cutter head 2 through the first adjusting nut 61, and the cutter head 2 and the guide block 3 gradually move outward. After the cutter head 2 moves to the final processing size measured by the measuring tool, the second adjusting nut 62 is adjusted to clamp the clamping part 6 together with the first adjusting nut 61, and the positioning nut 63 is adjusted to be close to the second adjusting nut 62, and the positioning nut 63 completes the positioning. During this process, it may be necessary to adjust the above nuts multiple times to ensure the processing accuracy.

[0033] In addition, when processing the inner cavity hole of the big belly, based on the above steps, after adjusting the positioning nut 63 to the final position, the core shaft 4 is driven to move by the second adjusting nut 62. Under the action of the limit spring, the cutter head 2 and the guide block 3 are recovered to facilitate the insertion of the boring tool from one side of the big belly workpiece, and the cutter head 2 and the guide block 3 can smoothly enter the inner cavity hole of the big belly (the hole with a larger aperture in the middle). It should be pointed out that a guide hole must be made on the lathe in advance for the inner cavity hole of the big belly so that the cutter head 2 and the guide block 3 can enter the inner cavity hole of the big belly. After the cutter head 2 and the guide block 3 enter, the second adjusting nut 62 and the first adjusting nut 61 are adjusted respectively so that the second adjusting nut 62 is close to the positioning nut 63 to ensure the processing size. Finally, the clamp 6 is limited and fixed by adjusting the first adjusting nut 61, and the processing can be started.

[0034] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An adjustable boring tool, comprising a tool body (1), a tool head (2) and a plurality of guide blocks (3), characterized in that: A movable core shaft (4) is provided in the knife body (1), and the movement of the core shaft (4) can drive the knife head (2) and the guide block (3) to move outward synchronously. The knife head (2) and the guide block (3) are respectively provided with elastic limiters (5) for limiting their outward movement. The knife head (2) and the guide block (3) are stably fixed at a predetermined movement position by the elastic limiter (5) and the core shaft (4). At least one limit strip hole (7) is provided on the knife body (1), and a clamping member (6) is correspondingly provided on the core shaft (4). The clamping member (6) can move in the limit strip hole (7). A fixing mechanism is provided on the knife body (1), and the fixing mechanism can stably fix the clamping member (6) at a predetermined movement position. The knife head (2) comprises a knife A seat (21) and a tool (22), wherein the knife seat (21) is movably arranged in a knife body mounting groove (11) of the knife body (1), the inner side of the knife seat (21) is a bevel structure, a first bevel body (41) matching the bevel of the knife seat (21) is provided at a corresponding position of the core shaft (4), and the first bevel body (41) presses the knife seat (21) to move outwards through movement of the core shaft (4), and the guide block (3) is movably arranged in a guide block mounting groove (12) of the knife body (1), the inner side of the guide block (3) is a bevel structure, a second bevel body (42) matching the bevel of the guide block (3) is provided at a corresponding position of the core shaft (4), and the second bevel body (42) presses the guide block (3) to move outwards through movement of the core shaft (4); The elastic limiting member (5) is a limiting spring, a first spring mounting groove (8) is provided at a corresponding position of the knife body (1), a limiting groove (23) for the limiting spring to pass through is provided at a corresponding position of the knife seat (21), the limiting spring surrounds the knife body (1) and is fixed on the first spring mounting groove (8), and the knife seat (21) is limited and fixed by the limiting groove (23); The elastic limiting member (5) is a limiting spring. A second spring mounting groove (9) is provided at a corresponding position of the knife body (1). A limiting hole (31) is provided at a corresponding position of the guide block (3) for the limiting spring to pass through. The limiting spring surrounds the knife body (1) and is installed in the second spring mounting groove (9). The limiting holes (31) limit and fix a plurality of guide blocks (3).

2. An adjustable boring tool according to claim 1, characterized in that: The fixing mechanism comprises at least one adjusting nut and a positioning nut (63); the clamping member (6) is a clamping column located between the adjusting nut and the positioning nut (63); and the knife body (1) is provided with a threaded portion (64) that cooperates with the nut.

3. An adjustable boring tool according to claim 2, characterized in that: The fixing mechanism comprises two adjusting nuts, namely a first adjusting nut (61) and a second adjusting nut (62), the first adjusting nut (61) and the second adjusting nut (62) being respectively located on two sides of the clamping member (6), and the positioning nut (63) being located on the outside of the second adjusting nut (62) and close to one side of the guide block (3).

4. An adjustable boring tool according to claim 3, characterized in that: A clamping member slot (10) is provided on the side of the first adjusting nut (61) and the second adjusting nut (62) that contacts the clamping member (6).

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