Boring cutter adjusting mechanism and boring mechanism

Abstract

The utility model relates to the technical field of machining, in particular to a boring cutter adjusting mechanism and a boring mechanism, the boring cutter adjusting mechanism comprises a mounting sleeve, an adjusting sleeve and an adjusting screw rod; a first threaded hole is formed in one end of the boring cutter, a blade is arranged at the other end of the boring cutter, and the threaded hole end of the boring cutter is slidably inserted into the mounting sleeve; the end, away from the blade end of the boring cutter, of the mounting sleeve is provided with external threads, the first end of the adjusting sleeve is assembled at the threaded end of the mounting sleeve in a threaded mode, the first end of the adjusting screw is coaxially and rotationally connected with the adjusting sleeve, and the second end of the adjusting screw is assembled in the first threaded hole in a threaded mode. A stopping structure used for stopping the adjusting screw rod from moving in the axial direction of the adjusting sleeve is arranged between the adjusting screw rod and the adjusting sleeve, the stroke of the boring cutter is large, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a boring tool adjusting mechanism and a boring mechanism. Background Art

[0002] Boring is a cutting process that uses a tool to enlarge the inner diameter of a hole or other circular contour. Its application range generally ranges from semi-finishing to finishing, and the tool used is a boring tool. The boring bar is coaxially installed on the main shaft of the boring equipment. A boring tool that can move radially along the boring bar is installed at one end of the boring bar away from the main shaft. The axis of the boring tool is arranged radially along the boring bar. During the boring process, the boring tool is moved radially along the boring bar to adjust the feed rate of the boring tool.

[0003] Chinese invention patent with the application number 2014108017138 discloses a fine-tuning mechanism for a boring tool, including a mounting sleeve, a screw rod, and a boring tool. The mounting sleeve is installed in the radial mounting hole of the boring bar. The inner wall of the first end of the mounting sleeve is provided with an internal thread. The second end of the mounting sleeve is slidably inserted with a boring tool. One end of the boring tool is provided with a cutting edge, and the other end of the boring tool is provided with a threaded hole. The end of the boring tool with the threaded hole is slidably arranged at the second end of the mounting sleeve; the screw rod is provided with a large-diameter end and a small-diameter end. The large-diameter end is screwed to the first end of the mounting sleeve, and the small-diameter end extends towards the second end of the mounting sleeve and is screwed into the threaded hole of the boring tool. When the screw rod is rotated, the moving distance of the cutting edge end of the boring tool is equal to the difference between the pitch of the large-diameter end and the pitch of the small-diameter end, ensuring the adjustment accuracy of the boring tool. However, when using this fine-tuning mechanism for the boring tool, the total number of turns that the screw rod can rotate is limited by the ratio of the depth of the threaded hole to the pitch of the small-diameter end. The machining area of the boring tool is mostly an inner hole. Limited by the area to be machined, the depth of the threaded hole often needs to be set shallower, and for each turn of the screw rod, the moving distance of the cutting edge end of the boring tool is very small, and the adjustment stroke of the boring tool is small. Therefore, this type of boring tool cannot be applied to the machining requirements of various specifications of inner holes, resulting in a small application range of this type of boring tool and being difficult to promote. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is that the existing fine-tuning mechanism for a boring tool has a small adjustment stroke for the cutting edge end of the boring tool and a small application range.

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a boring tool adjustment mechanism for installing a boring tool, comprising a mounting sleeve, an adjusting sleeve and an adjusting screw; one end of the boring tool has a first threaded hole, the other end of the boring tool has a blade, and the screw hole end of the boring tool is slidably inserted in the mounting sleeve; the end of the mounting sleeve away from the blade end of the boring tool has an external thread, the first end of the adjusting sleeve is threadedly assembled on the threaded end of the mounting sleeve, the first end of the adjusting screw is coaxially rotatably connected with the adjusting sleeve, the second end of the adjusting screw is threadedly assembled in the first threaded hole, and a stopping structure for stopping the adjusting screw from moving axially along the adjusting sleeve is provided between the adjusting screw and the adjusting sleeve.

[0006] As a preferred solution, the stopping structure includes a protrusion arranged on the inner side of the first end of the adjusting sleeve and an annular groove arranged on the outer side of the first end of the adjusting screw, and the protrusion is slidably arranged in the annular groove.

[0007] As a preferred embodiment, the adjusting screw includes a screw body, the first end of the screw body is threaded in the first threaded hole, and the outer fixed sleeve of the second end of the screw body is provided with an adjusting cap and an annular flange arranged at intervals along the axial direction of the screw body, and the interval between the adjusting cap and the annular flange forms the annular groove.

[0008] As a preferred solution, first scale marks are evenly spaced apart on the outer circumference of the adjusting cap, and a first zero point mark is provided on the outer side of the adjusting sleeve.

[0009] As a preferred solution, second scale marks are evenly spaced apart on the outer circumference of the adjustment sleeve, and a second zero point mark is provided on the outer side of the installation sleeve at a position close to the external thread.

[0010] As a preferred solution, the external thread is a coarse thread, and the thread of the first threaded hole is a fine thread.

[0011] As a preferred solution, a second threaded hole is provided in the cylindrical wall of one end of the mounting sleeve close to the blade end, a first locking screw is threaded in the second threaded hole, and the end of the threaded end of the first locking screw abuts against the outer side of the boring tool.

[0012] A boring mechanism comprises the above-mentioned boring tool adjustment mechanism, the boring mechanism also comprises a boring bar, the boring bar is provided with mounting holes arranged along the diameter direction of the boring bar, and the mounting sleeve of the boring tool adjustment mechanism is installed in the mounting hole.

[0013] As a preferred solution, a third threaded hole is provided in the hole wall of the mounting hole, a second locking screw is threaded in the third threaded hole, and the end of the threaded end of the second locking screw abuts against the outer side of the mounting sleeve.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model discloses a boring tool adjustment mechanism, comprising a mounting sleeve, an adjusting sleeve and an adjusting screw; one end of the boring tool is provided with a first threaded hole, the other end of the boring tool is provided with a blade, and the screw hole end of the boring tool is slidably inserted in the mounting sleeve; the end of the mounting sleeve away from the blade end of the boring tool is provided with an external thread, the first end of the adjusting sleeve is threadedly assembled on the threaded end of the mounting sleeve, the first end of the adjusting screw is coaxially rotatably connected with the adjusting sleeve, the second end of the adjusting screw is threadedly assembled in the first threaded hole, and a stopping structure for stopping the adjusting screw from moving axially along the adjusting sleeve is provided between the adjusting screw and the adjusting sleeve; the adjusting screw can rotate relative to the adjusting sleeve but cannot move axially relative to the adjusting sleeve, rotating the adjusting sleeve can drive the adjusting screw to move axially along the mounting sleeve to realize the adjustment of the boring tool stroke, after the adjusting sleeve is adjusted into place, the adjusting screw is then rotated to further adjust the boring tool stroke, the boring tool stroke is equal to the sum of the external thread length of the mounting sleeve and the depth of the first threaded hole, the boring tool stroke is large, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the boring cutter adjustment mechanism of the utility model;

[0017] Figure 2 for Figure 1 Middle AA section view;

[0018] Figure 3 It is a structural schematic diagram of the boring mechanism of the utility model;

[0019] In the figure, 100, boring tool, 1, mounting sleeve, 2, adjusting sleeve, 21, raised portion, 3, adjusting screw, 31, screw body, 32, annular flange, 4, adjusting cap, 5, first locking screw, 6, boring bar, 7, second locking screw, 8, spacer, and 9, countersunk screw. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. It should be understood that the terms "first", "second", etc. are used in the present utility model to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0022] The boring tool adjustment mechanism of the utility model is used to install the boring tool 100, such as Figure 1 , Figure 2 As shown, the boring tool adjustment mechanism of the utility model includes a mounting sleeve 1, an adjusting sleeve 2 and an adjusting screw 3; one end of the boring tool 100 has a first threaded hole, the other end of the boring tool 100 has a blade, and the threaded hole end of the boring tool 100 is slidably inserted in the mounting sleeve 1; the end of the mounting sleeve 1 away from the blade end of the boring tool 100 has an external thread, the first end of the adjusting sleeve 2 is threadedly assembled on the threaded end of the mounting sleeve 1, the first end of the adjusting screw 3 is coaxially rotatably connected with the adjusting sleeve 2, the second end of the adjusting screw 3 is threadedly assembled in the first threaded hole, and a stopping structure for stopping the adjusting screw 3 from moving axially along the adjusting sleeve 2 is provided between the adjusting screw 3 and the adjusting sleeve 2. Under the constraint of the stopping structure, the adjusting screw 3 can rotate relative to the adjusting sleeve 2, but cannot move axially relative to the adjusting sleeve 2; rotating the adjusting sleeve 2 can drive the adjusting screw 3 to move axially along the mounting sleeve 1, thereby adjusting the stroke of the boring tool 100; after adjusting the adjusting sleeve 2 into place, the adjusting screw 3 is then rotated to further adjust the stroke of the boring tool 100. The stroke of the boring tool 100 is equal to the sum of the external thread length of the mounting sleeve 1 and the depth of the first threaded hole. The stroke of the boring tool 100 is large and has a wide range of application.

[0023] The stop structure includes a protrusion 21 disposed on the inner side of the first end of the adjusting sleeve 2 and an annular groove disposed on the outer side of the first end of the adjusting screw 3, and the protrusion 21 is slidably disposed in the annular groove. Specifically, the protrusion 21 can be an annular protrusion arranged around the axis of the adjusting sleeve 2, or a single protrusion protruding toward the axis direction of the adjusting sleeve 2.

[0024] Specifically, the adjusting screw 3 includes a screw body 31. The first end of the screw body 31 is screwed into the first threaded hole. A regulating cap 4 and an annular flange 32 are fixedly sleeved outside the second end of the screw body 31 at intervals along the axial direction of the screw body 31. The interval between the regulating cap 4 and the annular flange 32 forms an annular groove. By rotating the regulating cap 4, the adjusting screw 3 can be driven to rotate. The regulating cap 4 not only facilitates the rotation of the adjusting screw 3, but also cooperates with the annular flange 32 to play a role in axially blocking the adjusting screw 3. The annular flange 32 can be fixed to the outside of the adjusting screw 3 by welding, or can be fixed to the outside of the adjusting screw 3 by interference fitting or pressing; in other embodiments of the present invention, the annular flange 32 can be processed by integrally forming with the adjusting screw 3. For example, the raw material of the adjusting screw 3 is set as a bar, the diameter of the bar is slightly larger than the diameter of the annular flange 32, and the bar is turned by turning a stepped shaft to process the thread and the annular flange 32.

[0025] Since the customized processing of the regulating cap 4 is relatively complex, in this embodiment, an existing cap-shaped scale is used as the regulating cap 4. To facilitate connecting the cap-shaped scale to the adjusting screw 3, a spacer 8 is provided at the end of the cap-shaped scale. The spacer 8 is quickly provided with a countersunk screw 9 hole. A countersunk screw 9 is inserted into the countersunk screw 9 hole, and the pitch of the countersunk screw 9 is the same as the end pitch of the adjusting screw 3 away from the boring tool 100. By tightening the countersunk screw 9, the adjusting screw 3 can be stably connected to the cap-shaped scale, so that the adjusting screw 3 and the cap-shaped scale form an integral body.

[0026] Further, to facilitate the precise control of the feed amount of the boring tool 100, in this embodiment, first scale marks are evenly spaced on the outer peripheral side of the regulating cap 4, and a first zero mark is provided on the outside of the adjusting sleeve 2. Specifically, the first scale marks include a plurality of scale lines evenly spaced around the axis of the adjusting sleeve 2. The scale lines evenly divide the circumference of the regulating cap 4. For each rotation of the regulating cap 4, the stroke of the boring tool 100 is one pitch of the first threaded hole. By observing the rotation angle of the regulating cap 4 and combining the pitch of the first threaded hole, the corresponding relationship between the rotation angle of the regulating cap 4 and the stroke of the boring tool 100 can be calculated.

[0027] In this embodiment, the external thread at the end of the mounting sleeve 1 away from the cutting edge is a coarse-thread thread, and the thread of the first threaded hole is a fine-thread thread. Specifically, the external thread at the end of the mounting sleeve 1 away from the cutting edge is a coarse-thread thread. The pitch of the coarse-thread thread is relatively large, which can realize the rapid adjustment of the position of the adjusting screw 3. The pitch of the fine-thread thread is relatively small, which can realize the precise adjustment of the stroke of the boring tool 100. Setting the external thread at the end of the mounting sleeve 1 away from the cutting edge as a coarse-thread thread and setting the thread of the first threaded hole as a fine-thread thread can not only ensure the adjustment speed of the stroke of the boring tool 100, but also ensure the adjustment accuracy.

[0028] Furthermore, second scale marks are evenly spaced on the outer peripheral side of the adjusting sleeve 2, and a second zero mark is provided on the outer side of the mounting sleeve 1 near the position of the external thread. Specifically, the second scale marks include a plurality of scale lines evenly spaced around the axis of the adjusting sleeve 2. The scale lines divide the circumference of the adjusting sleeve 2 evenly. For each full rotation of the adjusting sleeve 2, the stroke of the movement of the adjusting sleeve 2 driving the screw rod is one pitch of the external thread. By observing the rotation angle of the adjusting sleeve 2 and combining with the screw connection of the external thread, the corresponding relationship between the rotation angle of the adjusting cap 4 and the movement of the adjusting screw rod 3 can be calculated, so that the operator can clearly calculate the angle of rotation of the adjusting sleeve 2 required according to the required movement amount of the adjusting screw rod 3.

[0029] In this embodiment, to prevent the boring tool 100 that has been adjusted in place from sliding relative to the mounting sleeve 1, a second threaded hole is provided in the barrel wall at one end of the mounting sleeve 1 near the cutting edge end, and a first locking screw 5 is screwed into the second threaded hole. The end of the threaded end of the first locking screw 5 abuts against the outer side of the boring tool 100. Specifically, in this embodiment, a part of the arc on the side opposite to the first locking screw 5 is milled or wire cut to form a platform for preventing the milling cutter from rotating axially relative to the mounting sleeve 1, and the first shown screw abuts against the platform.

[0030] An embodiment of a boring mechanism, as Figure 3 shown, includes the above-mentioned boring tool adjusting mechanism. The boring mechanism further includes a boring bar 6. The boring bar 6 is provided with a mounting hole arranged along its own diameter direction, and the mounting sleeve 1 of the boring tool adjusting mechanism is installed in the mounting hole.

[0031] Furthermore, a third threaded hole is provided in the hole wall of the mounting hole, and a second locking screw 7 is screwed into the third threaded hole. The end of the threaded end of the second locking screw 7 abuts against the outer side of the mounting sleeve 1. When the mounting sleeve 1 needs to be moved, loosen the second locking screw 7. After adjusting the mounting sleeve 1 in place, tighten the second locking screw 7 to fix the mounting sleeve 1. In other embodiments of the present invention, the second locking screw 7 may not be provided, and the mounting sleeve 1 can be fixed in the mounting hole by interference fit or welding. The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A boring tool adjustment mechanism for installing a boring tool (100), characterized in that: The invention comprises a mounting sleeve (1), an adjusting sleeve (2) and an adjusting screw (3); one end of the boring tool (100) has a first threaded hole, the other end of the boring tool (100) has a blade, and the threaded hole end of the boring tool (100) is slidably inserted in the mounting sleeve (1); the end of the mounting sleeve (1) away from the blade end of the boring tool (100) has an external thread, the first end of the adjusting sleeve (2) is threadedly assembled on the threaded end of the mounting sleeve (1), the first end of the adjusting screw (3) is coaxially rotatably connected with the adjusting sleeve (2), the second end of the adjusting screw (3) is threadedly assembled in the first threaded hole, and a stopping structure for stopping the adjusting screw (3) from moving axially along the adjusting sleeve (2) is provided between the adjusting screw (3) and the adjusting sleeve (2).

2. The boring tool adjustment mechanism according to claim 1, characterized in that: The blocking structure comprises a protrusion (21) arranged on the inner side of the first end of the adjusting sleeve (2) and an annular groove arranged on the outer side of the first end of the adjusting screw (3), wherein the protrusion (21) is slidably arranged in the annular groove.

3. The boring tool adjustment mechanism according to claim 2, characterized in that: The adjusting screw (3) comprises a screw body (31), the first end of the screw body (31) being threaded in the first threaded hole, the second end of the screw body (31) being fixedly sleeved on the outside with an adjusting cap (4) and an annular flange (32) arranged at intervals along the axial direction of the screw body (31), the interval between the adjusting cap (4) and the annular flange (32) forming the annular groove.

4. The boring tool adjustment mechanism according to claim 3, characterized in that: The outer circumference of the adjustment cap (4) is provided with first scale marks at even intervals, and the outer side of the adjustment sleeve (2) is provided with a first zero point mark.

5. The boring tool adjustment mechanism according to claim 1, characterized in that: The outer circumference of the adjustment sleeve (2) is provided with second scale marks at even intervals, and the outer side of the installation sleeve (1) is provided with a second zero point mark at a position close to the external thread.

6. The boring tool adjustment mechanism according to claim 1, characterized in that: The external thread is a coarse thread, and the thread of the first threaded hole is a fine thread.

7. The boring tool adjustment mechanism according to claim 1, characterized in that: A second threaded hole is provided on the wall of one end of the mounting sleeve (1) close to the blade end, a first locking screw (5) is screwed into the second threaded hole, and the end of the threaded end of the first locking screw (5) abuts against the outer side of the boring tool (100).

8. A boring mechanism, characterized in that: The boring tool adjustment mechanism comprises the boring tool adjustment mechanism according to any one of claims 1 to 7, wherein the boring mechanism further comprises a boring bar (6), the boring bar (6) is provided with a mounting hole arranged along the diameter direction thereof, and the mounting sleeve (1) of the boring tool adjustment mechanism is mounted in the mounting hole.

9. The boring mechanism according to claim 8, characterized in that: A third threaded hole is provided on the hole wall of the mounting hole, a second locking screw (7) is threaded in the third threaded hole, and the end of the threaded end of the second locking screw (7) abuts against the outer side of the mounting sleeve (1).

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