Adjustable tool holder with stress relief structure and cutting tool comprising same

Abstract

The application discloses an adjustable tool holder with stress release structure, which comprises, from top to bottom, a finishing blade mounting seat, an adjusting screw hole, an adjusting deformation groove and a tool holder clamping screw hole; the adjusting deformation groove comprises an inclined surface and a parallel surface; the inclined surface is arranged on the side away from the first side surface of the tool holder, and the parallel surface is arranged on the side close to the first side surface of the tool holder; the inclined surface is perpendicular to the second side surface of the tool holder and forms a certain angle with the bottom surface of the tool holder; the parallel surface is parallel to the bottom surface of the tool holder; the adjusting screw hole is used for the adjusting screw to pass through, so that the bottom of the adjusting screw is attached to the inclined surface; the tool holder clamping screw hole is used for the tool holder clamping screw to pass through, so as to fix the adjustable tool holder; the stress release avoiding groove is arranged between the first side surface and the second side surface of the tool holder. While realizing the axial bidirectional linear adjustment, the application can effectively release the deformation stress generated by the adjustment, and is convenient to operate, high in adjustment precision and strong in stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal cutting tools, in particular to an adjustable tool holder with stress release structure and a cutting tool thereof. BACKGROUND

[0002] In the metal cutting industry, in order to solve the increasingly high demand for surface quality of planar milling, various forms of high-precision cutting tools have emerged. There are mainly three forms of cutting tools. The first is to reduce the number of cutting inserts installed on the cutting tool to reduce the installation runout caused by the manufacturing and installation errors of multi-tooth inserts. However, this kind of tool greatly reduces the machining efficiency due to the small number of installed teeth. The second is to manufacture high-precision cutting tool bodies and cutting inserts and strictly control the runout in the axial direction of the tool. This kind of tool has high manufacturing difficulty and high manufacturing cost. The third is a commonly used tool, which increases an adjustable structure on the tool holder to realize the control of the axial runout by manual adjustment. This kind of tool has been widely used in planar finishing in various industries due to its flexibility and feasibility, and various adjustment structures of different principles have been designed to adjust the axial size and precision of the cutting insert.

[0003] By analyzing the cutting tool with an adjustment structure, it can be found that it is usually composed of four parts, namely the tool body, the cutting insert, the cutting insert fixing structure and the cutting insert adjustment structure. The cutting insert is generally made of hard material and is locked on the cutting insert adjustment structure through the cutting insert fixing structure. In cutting processing, reducing the processing auxiliary time is one of the effective ways to improve the processing efficiency and reduce the cost, so there is a demand for an adjustment structure that can quickly, conveniently and accurately adjust the position of the cutting insert.

[0004] Patent document CN203621587U discloses a milling tool with adjustable axial height of tool holder. A plurality of tool holder grooves are arranged on the tool body for installing tool holders. The cutting insert is installed on the upper end of the tool holder. The tool holder is pressed against the side surface of the tool holder groove by the tool holder locking screw. An adjustment groove extending along the center of the tool body is arranged on the tool holder. The adjustment screw head is in contact with the adjustment groove to extrude the adjustment groove, so that the tool holder adjustment groove can expand or contract in the axial direction to realize the axial adjustment of the cutting insert. The adjustment design of the tool holder can realize bidirectional adjustment, and the structure is simple and the adjustment is quick. However, the adjustment groove is located at the lower end of the tool holder locking screw, and it is relatively difficult to adjust the adjustment groove upward due to the clamping force of the tool holder locking screw. In addition, during the expansion of the adjustment groove in the axial direction, the tool holder will deform along the adjustment groove. However, since the tool holder and the positioning surface of the tool holder groove side surface are completely fitted without leaving a deformation space, the deformation will form a compressive stress on the fitted surface. Moreover, the adjustment screw head and the adjustment groove are in continuous contact during the adjustment process and the machining process, and the thread is always in engagement, which requires a high strength of the adjustment screw. SUMMARY

[0005] The main purpose of the present application is to overcome the above-mentioned defects in the prior art, and to provide a simple structure adjustable tool holder with stress release structure and cutting tool, which can effectively release the deformation stress generated by adjustment while realizing axial bidirectional linear adjustment, and is convenient to operate, high in adjustment precision and strong in stability.

[0006] The present application adopts the following technical scheme:

[0007] On the one hand, an adjustable tool holder with stress release structure comprises, from top to bottom, a finishing blade mounting seat, an adjusting screw hole, an adjusting deformation groove and a tool holder clamping screw hole; the adjusting deformation groove comprises an inclined surface and a parallel surface; the inclined surface is arranged on the side away from the first side surface of the tool holder, and the parallel surface is arranged on the side close to the first side surface of the tool holder; the inclined surface is perpendicular to the second side surface of the tool holder and forms a certain angle with the bottom surface of the tool holder; the parallel surface is parallel to the bottom surface of the tool holder; the adjusting screw hole is used for the adjusting screw to pass through, so that the bottom of the adjusting screw is attached to the inclined surface; the tool holder clamping screw hole is used for the tool holder clamping screw to pass through, so as to fix the adjustable tool holder; the stress release avoiding groove is arranged between the first side surface of the tool holder and the second side surface of the tool holder.

[0008] Preferably, the finishing blade mounting seat comprises a mounting seat first side surface and a mounting seat second side surface; and the stress release avoiding groove extends to the mounting seat first side surface and the mounting seat second side surface along the bisector of the first side surface of the tool holder and the second side surface of the tool holder.

[0009] Preferably, the stress release avoiding groove is an equal-width groove.

[0010] Preferably, the angle between the inclined surface and the bottom surface of the tool holder is α, and the angle range is 0°<α≤45°.

[0011] On the other hand, an adjustable cutting tool with stress release structure comprises the adjustable tool holder; further comprising: a tool body and a finishing cutting blade; the tool body is provided with at least one tool holder groove, each tool holder groove is provided with an adjusting tool holder, a tool holder clamping screw and an adjusting screw; the finishing cutting blade is locked on the adjustable tool holder by a blade locking screw; and the adjustable tool holder is locked on the tool body by a tool holder locking screw.

[0012] Preferably, the first side surface of the tool holder, the second side surface of the tool holder and the bottom surface of the tool holder are respectively attached to the first side surface of the tool holder groove, the second side surface of the tool holder groove and the bottom surface of the tool holder groove through the tool holder clamping screw; and the central axis extension line A2 of the tool holder clamping screw intersects with the first side surface of the tool holder groove, the second side surface of the tool holder groove and the bottom surface of the tool holder groove.

[0013] Preferably, the adjustable cutting tool with stress release structure further comprises: a finishing cutting insert, a bottom cutting insert and a peripheral cutting insert; the finishing cutting insert is locked on the finishing insert seat by an insert locking screw; the bottom cutting insert and the peripheral cutting insert are respectively locked on the tool body by insert locking screws.

[0014] Preferably, the installation direction of the bottom cutting insert is parallel to the central axis A1 of the tool body; the installation direction of the peripheral cutting insert is perpendicular to the central axis A1 of the tool body; and the installation direction of the finishing cutting insert is parallel to the central axis A1 of the tool body.

[0015] Preferably, the bottom cutting insert, the finishing cutting insert and the peripheral cutting insert are sequentially and spacedly arranged.

[0016] Preferably, the height of the bottom cutting insert and the peripheral cutting insert along the central axis A1 of the tool body is the same, and the height of the finishing cutting insert along the central axis A1 of the tool body is higher than that of the bottom cutting insert and the peripheral cutting insert.

[0017] From the above description of the present application, compared with the prior art, the present application has the following beneficial effects:

[0018] (1) The adjustable tool holder with stress release structure comprises, from top to bottom: a finishing insert seat, an adjusting screw hole, an adjusting deformation groove and a tool holder clamping screw hole; the adjusting deformation groove is a long and narrow groove with corners, and by adjusting the adjusting screw inserted into the adjusting screw hole and abutting against the inclined surface of the deformation groove, axial bidirectional linear adjustment can be realized; by arranging a stress release avoidance groove between the first side surface of the tool holder and the second side surface of the tool holder, the deformation stress generated by adjustment can be effectively released.

[0019] (2) The adjustable tool holder with stress release structure, the adjusting screw hole is arranged above the adjusting deformation groove, and adjustment is convenient.

[0020] (3) The adjustable tool holder with stress release structure, when adjusting the axial displacement, the tool holder clamping screw does not need to be loosened, on the one hand, the operation is convenient, and on the other hand, the auxiliary processing time can be reduced.

[0021] (4) The adjustable cutting tool with stress release structure comprises a finishing cutting insert installed on the adjustable tool holder, in addition, a bottom cutting insert and a peripheral cutting insert, and the bottom cutting insert, the finishing cutting insert and the peripheral cutting insert are sequentially and spacedly arranged, so that the requirements of various cutting applications can be met.

[0022] The above description is only a summary of the technical scheme of the present application. In order to make the technical scheme of the present application clearer, the specific embodiments of the present application are described below, and the above and other purposes, features and advantages of the present application can be more apparent and understandable.

[0023] The above and other purposes, advantages and features of the present application will become more apparent from the following detailed description of specific embodiments of the present application, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a perspective structural schematic diagram of the adjustable tool holder of the embodiment of the present application Figure 1 ;

[0025] Figure 2 is a perspective structural schematic diagram of the adjustable tool holder of the embodiment of the present application Figure 2 ;

[0026] Figure 3 is a top view structural schematic diagram of the adjustable tool holder of the embodiment of the present application

[0027] Figure 4 is a top view structural schematic diagram of the adjustable tool holder of the embodiment of the present application

[0028] Figure 5 is a front view structural schematic diagram of the adjustable tool holder of the embodiment of the present application

[0029] Figure 6 is a perspective structural schematic diagram of the tool body of the embodiment of the present application

[0030] Figure 7 is a front view structural schematic diagram of the cutting tool of the embodiment of the present application

[0031] 1, tool body; 2, bottom cutting insert; 3, peripheral cutting insert; 4, finishing cutting insert; 5, insert locking screw; 6, adjustable tool holder; 7, tool holder clamping screw; 8, adjusting screw; 11, tool holder groove; 11a, first side surface of tool holder groove; 11b, second side surface of tool holder groove; 11c, bottom surface of tool holder groove; 60a, first side surface of tool holder; 60b, second side surface of tool holder; 60c, bottom surface of tool holder; 61, stress release avoidance groove; 62, finishing insert mounting seat; 62a, first side surface of mounting seat; 62b, second side surface of mounting seat; 62c, bottom surface of mounting seat; 63, adjusting deformation groove; 63a, inclined surface; 63b, parallel surface; 64, adjusting screw hole; 65, tool holder clamping screw hole; 66, deformation position; a, included angle; X, inflection point. DETAILED DESCRIPTION

[0032] The present application is further described below through specific embodiments.

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0034] In the description of the present application, it should be noted that the terms "comprise", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitation, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, article or device comprising the element.

[0035] In the description of the present application, it should be noted that the terms "up", "down", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected, can be mechanically connected, or can be electrically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication between two elements inside, and those of ordinary skill in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0037] Referring to Figure 1 and Figure 2As shown in the figure, the adjustable tool holder with stress release structure comprises, from top to bottom, a finishing blade mounting seat 62, an adjusting screw hole 64, an adjusting deformation groove 63, and a tool holder clamping screw hole 65. The adjusting deformation groove 63 comprises an inclined surface 63a and a parallel surface 63b. The inclined surface 63a is arranged on the side away from the first side surface 60a of the tool holder, and the parallel surface 63b is arranged on the side close to the first side surface 60a of the tool holder. The inclined surface 63a is perpendicular to the second side surface 60b of the tool holder and forms a certain angle with the bottom surface 60c of the tool holder. The parallel surface 63b is parallel to the bottom surface 60c of the tool holder. The adjusting screw hole 64 is used for the adjusting screw 8 to pass through, so that the bottom of the adjusting screw 8 is in close contact with the inclined surface 63a. The tool holder clamping screw hole 65 is used for the tool holder clamping screw 7 to pass through, so as to fix the adjustable tool holder. The stress release avoidance groove 61 is arranged between the first side surface 60a and the second side surface 60b of the tool holder.

[0038] In this embodiment, the adjusting deformation groove 63 is a long strip-shaped narrow groove with a corner, and the inclined surface 63a is arranged on the side close to the tool holder clamping screw hole 65. Specifically, see Figure 3 As shown in the figure, the inclined surface 63a forms an angle α with the bottom surface 60c of the tool holder. The range of the angle α is 0°<α≤45°, and the optimal value of α in this scheme is 30°. The adjusting deformation groove 63 extends along the inclined surface 63a towards the first side surface 60a of the tool holder. During the extension process, the inclined surface 63a becomes the parallel surface 63b which is parallel to the bottom surface 60c of the tool holder. The extension of the parallel surface 63b enables the deformation position 66 of the adjustable tool holder 6 to achieve the maximum torque in a limited space.

[0039] As shown in the figure, the adjusting deformation groove 63 is a long strip-shaped narrow groove with a corner, and the inclined surface 63a is arranged on the side close to the tool holder clamping screw hole 65. Specifically, see Figures 3 to 6 As shown in the figure, the adjusting deformation groove 63 is a long strip-shaped narrow groove with a corner, and the inclined surface 63a is arranged on the side close to the tool holder clamping screw hole 65. Specifically, see The head of the adjusting screw 8 is threadedly connected with the adjusting screw hole 64, and the bottom flat surface is parallel to the inclined surface 63a. In this example, the thread of the adjusting screw 8 is M4, and the pitch is 0.8 mm. When the adjusting screw 8 is rotated clockwise, the adjusting screw 8 gradually approaches the inclined surface 63a of the adjusting deformation groove 63 until the bottom flat surface is completely in close contact with the inclined surface 63a. When the clockwise rotation is continued, the deformation position 66 of the adjustable tool holder 6 rotates slightly around the inflection point X of the adjusting deformation groove 63 due to the compression force between the threads, so that the finishing blade seat 62 deforms axially along the appearance axis of the tool body main body 1, and the finishing cutting blade 4 mounted on the finishing blade mounting seat 62 also axially displaces along the tool body main body 1. As described above, when α is 30°, the deformation amount of the adjusting screw 8 after one rotation clockwise is 0.8*cos30°

[0040] = 0.8 * 0.86 = 0.688 mm / r. The maximum rotation number is about 1 / 3 of a circle, so the maximum adjustment stroke is 0.229 mm. Similarly, when the adjusting screw 8 is rotated counterclockwise, the thread of the adjusting screw hole 64 is loosened upwards, a gap appears between the adjusting screw 8 and the inclined surface 63a, and the deformed position 66 of the adjustable tool holder 6 is restored due to the rigidity of the material itself. Since the pitch and angle α of the adjusting screw 8 are fixed, the deformed position 66 of the adjustable tool holder 6 will fall back with the same stroke when the adjusting screw 8 is rotated counterclockwise. That is, the height direction increases when the adjusting screw 8 is rotated clockwise, and the height direction decreases when the adjusting screw 8 is rotated counterclockwise. The adjusting screw 8 can achieve bidirectional equivalent progression of the finishing cutting insert 4 mounted on the adjustable tool holder 6, and the operation is simple. At the same time, the tool holder clamping screw 7 does not need to be loosened during adjustment, which can reduce the auxiliary machining time.

[0041] Further, since the adjusting structure is generated according to the rotational deformation of the deformed position 66 of the adjustable tool holder 6 around the inflection point X, a large stress will appear on the adjustable tool holder 6. Since the tool holder first side surface 60a and the tool holder second side surface 60b are tightly fitted with the tool holder groove first side surface 11a and the tool holder groove second side surface 11b under the action of the tool holder clamping screw 7, the deformation of the deformed position 66 of the adjustable tool holder 6 has no space to release at the positions of the tool holder first side surface 60a and the tool holder second side surface 60b, and a large stress will appear on the fitted surface, especially at the deformed position 66 of the fitted surface. If the maximum stress value exceeds the yield strength of the material, plastic deformation will occur, and the adjusting structure will fail. In order to solve this problem, a stress release avoidance groove 61 is arranged on the adjustable tool holder 6. The avoidance groove extends from the intersection line of the tool holder first side surface 60a and the tool holder second side surface 60b to the intersection line of the mounting seat first side surface 62a and the mounting seat second side surface 62b along the bisector of the two side surfaces, and is a groove with equal width. The stress release avoidance groove 61 releases the deformation space of the deformed position 66 of the adjustable tool holder 6 to the groove, and alleviates the problem of stress concentration.

[0042] As described above, referring to Figure 6 The application also discloses an adjustable cutting tool with a stress release structure, which comprises the adjustable tool holder 6, a tool body 1, and a finishing cutting insert 4. The tool body 1 is provided with at least one tool holder groove 11, each of which is provided with the adjustable tool holder 6, the tool holder clamping screw 7, and the adjusting screw 8. The finishing cutting insert 4 is locked on the adjustable tool holder 6 by the insert locking screw 5. The adjustable tool holder 6 is locked on the tool body 1 by the tool holder locking screw 7.

[0043] Specifically, the first side surface 60a of the tool holder, the second side surface 60b of the tool holder and the bottom surface 60c of the tool holder are respectively matched with the first side surface 11a of the tool holder groove, the second side surface 11b of the tool holder groove and the bottom surface 11c of the tool holder groove through the tool holder clamping screw 7; the central axis extension line A2 of the tool holder clamping screw 7 intersects with the first side surface 11a of the tool holder groove, the second side surface 11b of the tool holder groove and the bottom surface 11c of the tool holder groove.

[0044] Referring to Figure 7 Further, as shown, the adjustable cutting tool with stress release structure further comprises a finishing cutting blade 4, a bottom cutting blade 2 and a peripheral cutting blade 3; the finishing cutting blade 4 is locked on the finishing blade mounting seat 62 through the blade locking screw 5; the bottom cutting blade 2 and the peripheral cutting blade 3 are respectively locked on the tool body main body 1 through the blade locking screw 5.

[0045] The mounting direction of the bottom cutting blade 2 is parallel to the central axis A1 of the tool body main body 1; the mounting direction of the peripheral cutting blade 3 is perpendicular to the central axis A1 of the tool body main body 1; the mounting direction of the finishing cutting blade 4 is parallel to the central axis A1 of the tool body main body 1.

[0046] The bottom cutting blade 2, the finishing cutting blade 4 and the peripheral cutting blade 3 are sequentially and spacedly distributed.

[0047] The height of the bottom cutting blade 2 and the peripheral cutting blade 3 along the central axis A1 of the tool body main body 1 is same, and the height of the finishing cutting blade 4 along the central axis A1 of the tool body main body 1 is higher than that of the bottom cutting blade 2 and the peripheral cutting blade 3.

[0048] The adjustable cutting tool with stress release structure comprises a finishing cutting blade mounted on the adjustable tool holder, and further comprises a bottom cutting blade and a peripheral cutting blade, and the bottom cutting blade, the finishing cutting blade and the peripheral cutting blade are sequentially and spacedly distributed, so that the requirements of various cutting applications can be met.

[0049] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present application, or modify equivalent embodiments, without departing from the scope of the technical solution of the present application, by using the disclosed technical content. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical solution of the present application, shall fall within the scope of protection of the technical solution of the present application.

Claims

1. An adjustable tool holder with a stress relief structure, characterized in that, From top to bottom, it includes: a finishing blade mounting seat (62), an adjusting screw hole (64), an adjusting deformation groove (63), and a tool holder clamping screw hole (65); the adjusting deformation groove (63) and the finishing blade mounting seat (62) have a deformation position between them, which is located at the bottom of the finishing blade mounting seat (62) and the first side surface (60a) of the tool holder; the side surface of the adjusting deformation groove opposite to the deformation position is provided with an inclined surface (63a) and a parallel surface (63b); the inclined surface (63a) is arranged on the side away from the first side surface (60a) of the tool holder, and the parallel surface (63b) is arranged on the side close to the first side surface (60a) of the tool holder; the inclined surface (63a) is perpendicular to the second side surface (60b) of the tool holder and forms a certain angle with the bottom surface (60c) of the tool holder; the parallel surface (63b) is parallel to the bottom surface (60c) of the tool holder; the adjusting screw hole (64) is used for the adjusting screw (8) to pass through, so that the bottom of the adjusting screw (8) is attached to the inclined surface (63a); the tool holder clamping screw hole (65) is used for the tool holder clamping screw (7) to pass through, so as to fix the adjustable tool holder; the first side surface (60a) and the second side surface (60b) of the tool holder are provided with a stress release avoidance groove (61), which is located on the side surface of the finishing blade mounting seat (62) and extends in the up-down direction, and is used for releasing the deformation space of the deformation position to the stress release avoidance groove (61) to alleviate stress concentration.

2. The adjustable knife clamp with stress release structure according to claim 1, characterized in that, The finishing blade mounting seat (62) includes a mounting seat first side surface (62a) and a mounting seat second side surface (62b); the stress release avoidance groove (61) extends to the mounting seat first side surface (62a) and the mounting seat second side surface (62b) along the bisector of the first side surface (60a) and the second side surface (60b) of the tool holder.

3. The adjustable knife clamp with stress release structure of claim 2, wherein, The stress release avoidance groove (61) is a groove with equal width.

4. The adjustable knife clamp with stress release structure of claim 1, wherein, The angle between the inclined surface (63a) and the bottom surface (60c) of the tool holder is α, and the angle range is: 0° < α ≤ 45°.

5. An adjustable cutting tool with stress relief structure, characterized by It comprises the adjustable tool holder (6) as claimed in any one of claims 1 to 4; further comprising: a tool body main body (1) and a finishing cutting blade (4); the tool body main body (1) is provided with at least one tool holder groove (11), each tool holder groove (11) is provided with an adjustable tool holder (6), a tool holder clamping screw (7) and an adjusting screw (8); the finishing cutting blade (4) is locked on the adjustable tool holder (6) through a blade locking screw (5); the adjustable tool holder (6) is locked on the tool body main body (1) through the tool holder clamping screw (7).

6. The adjustable cutting tool with stress relief structure according to claim 5, wherein, The first side surface (60a), the second side surface (60b) and the bottom surface (60c) of the tool holder are respectively matched with the first side surface (11a), the second side surface (11b) and the bottom surface (11c) of the tool holder groove through the tool holder clamping screw (7); the central axis extension line A2 of the tool holder clamping screw (7) intersects with the first side surface (11a), the second side surface (11b) and the bottom surface (11c) of the tool holder groove.

7. The adjustable cutting tool with stress release structure according to claim 5, wherein Also includes: The bottom cutting blade (2) and the peripheral cutting blade (3); the finishing cutting blade (4) is locked on the finishing blade mounting seat (62) through the blade locking screw (5); the bottom cutting blade (2) and the peripheral cutting blade (3) are respectively locked on the tool body (1) through the blade locking screw (5).

8. The adjustable cutting tool with stress release structure according to claim 7, wherein, The installation direction of the bottom cutting blade (2) is parallel to the central axis A1 of the tool body (1); the installation direction of the peripheral cutting blade (3) is perpendicular to the central axis A1 of the tool body (1); the installation direction of the finishing cutting blade (4) is parallel to the central axis A1 of the tool body (1).

9. The adjustable cutting tool with stress relief structure according to claim 7, wherein, The bottom cutting blade (2), the finishing cutting blade (4) and the peripheral cutting blade (3) are sequentially and spacedly distributed.

10. The adjustable cutting tool with stress relief structure according to claim 7, wherein, The height of the bottom cutting blade (2) and the peripheral cutting blade (3) along the central axis A1 of the tool body (1) is the same, and the height of the finishing cutting blade (4) along the central axis A1 of the tool body (1) is higher than that of the bottom cutting blade (2) and the peripheral cutting blade (3).

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