An adjustable tool holder and a milling cutter

Abstract

The present invention discloses an adjustable tool holder, which includes a tool holder body. One side of the tool holder body is provided with a blade mounting portion. The blade mounting portion includes a bottom positioning surface, a first side positioning surface and a second side positioning surface which are respectively located on two adjacent sides of the bottom positioning surface. A center positioning portion for positioning the center of the finishing blade is provided in the middle of the bottom positioning surface. Both the first side positioning surface and the second side positioning surface protrude into the blade mounting portion and are used for line contact with the corresponding sides of the positioning finishing blade. The tool holder body is provided with an elastic deformation portion and an adjusting member for rotating the elastic deformation portion into the blade mounting portion. A third positioning surface is provided on the side of the elastic deformation portion facing into the blade mounting portion. The third positioning surface protrudes into the blade mounting portion and is used for positioning the same side of the finishing blade as the second side positioning surface. A milling cutter tool is also disclosed. The adjustable tool holder and the milling cutter tool are convenient to adjust, have good adjustment accuracy and can improve the positioning stability of the finishing blade.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting tools, and particularly to an adjustable tool holder and a milling cutter tool. Background Art

[0002] Patent No. CN201580055312 discloses a cutting blade and a tool. By arranging the long cutting edge parallel to the machined surface, the surface quality of the machined part is improved. This design has been widely applied in practice. Similar structural designs are also mentioned in Patent EP0769341B1 and PCTJP2008068355.

[0003] In practical applications of the above structure, it is found that for the cutting blade arranged parallel to the machined surface, that is, the finishing blade in professional terms, the parallel setting of its finishing edge and the machined surface is the key to the successful application of the tool. However, in practice, due to factors such as the manufacturing precision error of the tool and the blade and the precision error of the machine tool using the tool, the finishing edge may not be parallel to the machined surface during work. At this time, it is necessary to adjust the angle of the finishing edge according to the actual situation to make it parallel to the machined surface.

[0004] Patent PCTJP2008068355 proposes a solution to the above problem, that is, by directly contacting three adjusting screws with the finishing blade to adjust the inclination angle of the positioning surface of the finishing blade, so as to realize the adjustment of the finishing edge angle. The defects of this structure are as follows: 1) It is inconvenient to adjust by directly contacting and adjusting with three adjusting screws, and the adjustment accuracy is poor; 2) The adjusting screws are not subjected to extrusion pressure and only rely on the friction of the thread to keep the position fixed. Under the frequent vibration during the cutting process, the adjusting screws may become loose, resulting in a change in the positioning of the finishing blade.

[0005] An adjustable face milling cutter with a finishing surface, with the application number 202221263519.5, includes a blade seat and a blade arranged on the blade seat. The blade seat is inclined with an angle adjusting screw for adjusting the inclination angle of the corresponding blade, and the blade has an angle adjusting surface in contact with the angle adjusting screw. When the angle adjusting screw is tightened in the corresponding direction, the adjusting screw contacts the angle adjusting surface of the blade, pushing the blade to tilt. Although only one adjusting screw is rotated to adjust the blade inclination angle, there are still the following defects: 1) Initially, the blade contacts the blade seat surface through the angle adjusting surface. When the blade is pushed and rotated by the adjusting screw, the contact between the angle adjusting surface and the blade seat surface will become the end of the angle adjusting surface contacting the blade seat line. At this time, on the one hand, it will cause a large eccentricity of the blade, affecting the adjustment accuracy, and on the other hand, it will limit the rotation adjustment range of the blade; 2) The adjusting screw is subjected to the rigid extrusion pressure of the blade and is also prone to loosening under the frequent vibration during the cutting process, resulting in a change in the positioning of the finishing blade. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an adjustable tool holder and a milling cutter tool.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions:

[0008] An adjustable tool holder includes a tool holder body. One side of the tool holder body is provided with a blade mounting portion. The blade mounting portion includes a bottom positioning surface, a first side positioning surface and a second side positioning surface respectively located on two adjacent sides of the bottom positioning surface. A center positioning portion for positioning the center of the finishing blade is provided in the middle of the bottom positioning surface. Both the first side positioning surface and the second side positioning surface protrude into the blade mounting portion for line contact with the corresponding sides of the positioning finishing blade. The tool holder body is provided with an elastic deformation portion and an adjusting member for rotating the elastic deformation portion into the blade mounting portion. A third positioning surface is provided on the side of the elastic deformation portion facing the inside of the blade mounting portion. The third positioning surface protrudes into the blade mounting portion for positioning with the same side of the second side positioning surface of the finishing blade.

[0009] As a further improvement of the above technical solution:

[0010] The first side positioning surface, the second side positioning surface and the third positioning surface are all perpendicular to the bottom positioning surface.

[0011] One side surface of the tool holder body opposite to the blade mounting portion is set as a first reference surface C. The bottom positioning surface has an included angle β with the first reference surface C, and the distance between the side of the bottom positioning surface far from the second side positioning surface and the first reference surface C is farther than the distance between the side close to the second side positioning surface and the first reference surface C.

[0012] 5° ≤ β ≤ 11°.

[0013] β = 7°.

[0014] One end of the elastic deformation portion is correspondingly connected to the second side positioning surface, and the other end protrudes towards the first side positioning surface. An extrusion deformation gap is formed between the elastic deformation portion and the tool holder body. The adjusting member is threadedly connected to the tool holder body and is extruded into the extrusion deformation gap.

[0015] The adjusting member includes a tapered head and a threaded column fixedly connected. The threaded column is threadedly connected to the tool holder body, and the tapered head is extruded into the extrusion deformation gap.

[0016] Two adjacent side surfaces between the side surface of the tool holder body where the blade mounting portion is located and the first reference surface C are respectively set as a second reference surface A and a third reference surface B. Both the second reference surface A and the third reference surface B are perpendicular to the first reference surface C.

[0017] The side surfaces of the tool holder body opposite to the second reference plane A and the third reference plane B are respectively set as the fourth reference plane D and the fifth reference plane E. The fourth reference plane D is parallel to the second reference plane A, the fifth reference plane E is parallel to the third reference plane B, and the bottom positioning surface intersects with the fourth reference plane D and the fifth reference plane E.

[0018] Screw holes are provided on the tool holder body. The screw holes penetrate through the intersection line of the fourth reference plane D and the fifth reference plane E and the second reference plane A.

[0019] The first side positioning surface, the second side positioning surface, and the third positioning surface are all arc surfaces.

[0020] A finishing blade is installed on the blade mounting portion through a mounting screw. The mounting screw passes through the center of the finishing blade and is connected to the center positioning portion. The finishing blade includes a lower surface, an upper surface, and a first side surface and a second side surface that are connected between the lower surface and the upper surface and are adjacent to each other. The lower surface contacts the bottom positioning surface, the first side surface is in line contact with the first side positioning surface, the second side surface is in uniform line contact with the second side positioning surface and the third positioning surface, and a finishing cutting edge is provided on one side of the upper surface away from the second side surface.

[0021] A milling cutter tool includes a milling cutter body having a rotation axis X. One or more cutting blades and the above-mentioned adjustable tool holder are provided on the circumferential side of the milling cutter body. An adjusting mechanism for moving and adjusting the tool holder body along the rotation axis X is provided on the milling cutter body, and a locking screw is provided in the screw hole.

[0022] Compared with the prior art, the advantages of the present invention are as follows:

[0023] For the adjustable tool holder of the present invention, during use, the finishing blade is installed on the blade installation part 11 through installation screws, such that the lower surface of the finishing blade contacts the bottom positioning surface, the first side surface of the finishing blade is in line contact with the first side positioning surface, the second side surface of the finishing blade is in line contact with both the second side positioning surface and the third positioning surface, and the finishing edge on the upper surface of the finishing blade is located on the side away from the second side surface. At this time, the first side positioning surface and the first side surface of the positioning finishing blade are in first line contact, the second side positioning surface and the second side surface of the positioning finishing blade are in second line contact, and the third side positioning surface and the third side surface of the positioning finishing blade are in third line contact. By means of the adjusting member, the elastic deformation part deforms and rotates into the blade installation part, and the elastic deformation part presses the finishing blade, causing points G1 and G2 on the finishing blade to rotate around the central positioning part to adjust the position, thereby adjusting the angle of the finishing edge. Compared with screwing and adjusting multiple adjusting screws, this adjustable tool holder only needs to use one adjusting member to make the elastic deformation part rotate into the blade installation part to achieve the adjustment of the finishing blade, which is convenient for adjustment. Moreover, since the first side positioning surface, the second side positioning surface, and the third side positioning surface of the blade installation part are all in line contact with the finishing blade, when the finishing blade is pushed and rotated, the contact between the finishing blade and each side positioning surface is still in line contact, and the position of the contact line is very close to the position of the contact line when the finishing blade does not rotate. In this way, it basically does not affect the positioning of the finishing blade and cause a large eccentricity of the finishing blade, thereby improving the adjustment accuracy. Furthermore, the adjusting member is elastically extruded by the elastic deformation part and is not prone to loosening, with good stability, thereby improving the stability of positioning the finishing blade.

[0024] For the adjustable tool holder of the present invention, since the adjusting member realizes the deformation of the blade installation part through the conical head, and the deformation of the blade installation part realizes the rotation of the finishing blade through the angle β. Let the taper of the conical head of the adjusting member be K, and the bottom positioning surface and the first reference surface C have an included angle β. Then, after the adjusting member rotates a displacement distance M, the moving distance of G1 relative to G2 = M * tan(K / 2) * tanE. Taking K = 15° and β = 7°, the moving distance of point G1 relative to point G2 = 0.016 * M. Thus, it can be seen that through two conversions of angles, the 5 - millimeter - level moving distance of the adjusting member can be converted into a micron - level movement of point G1, greatly improving the adjustment accuracy.

[0025] The milling cutter of the present invention includes an adjustable tool holder and has all the advantages of the adjustable tool holder. Brief Description of the Drawings

[0026] Figure 1 is a three - dimensional structural schematic diagram (including the finishing blade) of the adjustable tool holder of the present invention.

[0027] Figure 2 is Figure 1 the top - view structural schematic diagram of

[0028] Figure 3 This is an exploded view of the adjustable tool holder of the present invention (including the finishing blade).

[0029] Figure 4 This is a perspective structural schematic diagram of the tool holder body of the adjustable tool holder of the present invention from the first perspective.

[0030] Figure 5 This is a perspective structural schematic diagram of the tool holder body of the adjustable tool holder of the present invention from the second perspective.

[0031] Figure 6 This is a top view structural schematic diagram of the tool holder body of the adjustable tool holder of the present invention.

[0032] Figure 7 is Figure 6 the cross-sectional view of F-F in

[0033] Figure 8 This is a top view structural schematic diagram of the finishing blade of the adjustable tool holder of the present invention.

[0034] Figure 9 This is a perspective structural schematic diagram of the milling cutter tool of the present invention.

[0035] Each label in the figure represents:

[0036] 1. Tool holder body; 11. Blade installation part; 111. Bottom positioning surface; 112. First side positioning surface; 1121. First line; 113. Second side positioning surface; 1131. Second line; 1132. Third line; 114. Center positioning part; 13. Extrusion deformation seam; 14. Screw hole; 2. Finishing blade; 21. Finishing cutting edge; 211. Lower surface; 212. First side surface; 213. Second side surface; 214. Upper surface; 3. Mounting screw; 4. Elastic deformation part; 41. Third positioning surface; 5. Adjusting part; 51. Tapered head; 52. Threaded column; 6. Locking screw; 7. Milling cutter body; 71. Cutting blade; 72. Bottom surface; 8. Adjusting mechanism. Detailed implementation mode

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 should not be construed as a limitation to the present invention.

[0039] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0040] In the present invention, unless otherwise clearly specified and defined, terms such as "assembled", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Embodiment 1:

[0042] Figures 1 to 8 An embodiment of the adjustable tool holder of the present invention is shown. The adjustable tool holder of this embodiment includes a tool holder body 1. A blade mounting portion 11 is provided on one side of the tool holder body 1. The blade mounting portion 11 includes a bottom positioning surface 111, a first side positioning surface 112 and a second side positioning surface 113 respectively located on two adjacent sides of the bottom positioning surface 111. A center positioning portion 114 for positioning the center of the finishing blade 2 is provided in the middle of the bottom positioning surface 111. Both the first side positioning surface 112 and the second side positioning surface 113 protrude into the blade mounting portion 11 for line contact with the corresponding sides of the positioning finishing blade 2. An elastic deformation portion 4 and an adjusting member 5 for rotating the elastic deformation portion 4 into the blade mounting portion 11 are provided on the tool holder body 1. A third positioning surface 41 is provided on the side of the elastic deformation portion 4 facing into the blade mounting portion 11. The third positioning surface 41 protrudes into the blade mounting portion 11 for positioning with the same side of the second side positioning surface 113 of the positioning finishing blade 2.

[0043] During use, as Figures 1 to 3As shown in the figure, the finishing blade 2 is installed on the blade mounting portion 11 through the mounting screw 3, so that the lower surface 211 of the finishing blade 2 contacts the bottom positioning surface 111, the first side surface 212 of the finishing blade 2 is in line contact with the first side positioning surface 112, the second side surface 213 of the finishing blade 2 is in line contact with both the second side positioning surface 113 and the third positioning surface 41, and the finishing edge 21 on the upper surface 214 of the finishing blade 2 is located on the side away from the second side surface 213. At this time, the first side positioning surface 112 and the first side surface 212 of the positioning finishing blade 2 are in contact through the first line 1121, the second side positioning surface 113 and the second side surface 213 of the positioning finishing blade 2 are in contact through the second line 1131, and the third positioning surface 41 and the third positioning surface 41 of the positioning finishing blade 2 are in contact through the third line 1132. As Figure 2 shown in the figure, by adjusting the component 5, the elastic deformation portion 4 is rotated into the blade mounting portion 11. The elastic deformation portion 4 presses the finishing blade 2, so that points G1 and G2 on the finishing blade 2 rotate around the central positioning portion 114 to adjust the position, thereby adjusting the angle of the finishing edge 21. Compared with screwing and adjusting a plurality of adjusting screws, this adjustable tool holder only needs to rotate the elastic deformation portion 4 into the blade mounting portion 11 through one adjusting component 5 to realize the adjustment of the finishing blade 2, and the adjustment is convenient. And because the first side positioning surface 112, the second side positioning surface 113 and the third positioning surface 41 of the blade mounting portion 11 are all in line contact with the finishing blade 2, when the finishing blade 2 is pushed and rotated, the contact between the finishing blade 2 and each side positioning surface is still in line contact, and the position of the contact line is very close to the position of the contact line when the finishing blade 2 does not rotate. In this way, the positioning of the finishing blade 2 is basically not affected and a large eccentricity of the finishing blade 2 is not caused, thereby improving the adjustment accuracy. Moreover, the adjusting component 5 is elastically extruded by the elastic deformation portion 4 and is not prone to loosening, and has good stability, thereby improving the stability of positioning the finishing blade 2.

[0044] Further, in this embodiment, the first side positioning surface 112, the second side positioning surface 113 and the third positioning surface 41 are all perpendicular to the bottom positioning surface 111. The blade mounting portion 11 with this structure has a good positioning effect on the finishing blade 2.

[0045] Further, in this embodiment, as Figure 4 shown in the figure, one side surface of the tool holder body 1 relative to the blade mounting portion 11 is set as the first reference surface C. The bottom positioning surface 111 and the first reference surface C have an included angle β, and the distance between the side of the bottom positioning surface 111 away from the second side positioning surface 113 and the first reference surface C is farther than the distance between the side close to the second side positioning surface 113 and the first reference surface C.

[0046] Further, both the first side surface 212 and the second side surface 213 are planes.

[0047] Furthermore, the first side positioning surface 112, the second side positioning surface 113, and the third positioning surface 41 are all arc surfaces.

[0048] When the adjusting member 5 further presses the elastic deformation portion 4, as Figure 2 shown, the elastic deformation portion 4 undergoes a rotational displacement to the right, while the basic position of the second side positioning surface 113 remains unchanged. Under the pushing of the elastic deformation portion 4, the finishing blade 2 will rotate clockwise; taking two points G1 and G2 on the finishing blade 2 as references, G1 moves a certain distance to the right relative to G2, and this distance is approximately equal to the displacement of the elastic deformation portion 4. It should be noted that: since the first side positioning surface 112 and the second side positioning surface 113 of the blade mounting portion 11 are curved surface structures, while the first side surface 212 and the second side surface 213 of the finishing blade 2 are flat surfaces; therefore, when the finishing blade 2 rotates, the contact between the finishing blade 2 and each side positioning surface is still a line contact, and the position of the contact line is very close to the position of the contact line when the finishing blade 2 does not rotate. Therefore, it basically does not affect the positioning of the finishing blade 2 and the eccentric direction of the mounting screw 3. On the contrary: if each side positioning surface is a flat surface, then the corresponding side surface of the finishing blade 2 and the side positioning surface of the blade mounting portion 11 are surface contacts, they are parallel and the distance is zero. When the finishing blade 2 rotates, they are no longer parallel, the contact becomes a line contact, and the position of the contact line is at one end of the side positioning surface of the blade mounting portion 11. At this time, it will seriously affect the positioning accuracy and cause the eccentricity of the mounting screw 3 to be too large.

[0049] Furthermore, in this embodiment, 5° ≤ β ≤ 11°.

[0050] As Figure 4 and Figure 7 shown, since the bottom positioning surface 111 has an angle β with the first reference plane C, in Figure 2 , while point G1 moves to the right, it also undergoes a displacement in the direction perpendicular to the first reference plane C, specifically away from the first reference plane C, that is, point G1 is further away from the first reference plane C relative to point G2, and the finishing blade 2 rotates clockwise, that is, the finishing edge 21 of the finishing blade 2 rotates clockwise relative to the tool holder body 1. Since during use, the tool holder body 1 is fixed on the milling cutter body 7 and does not move when not adjusted, it can be seen that by the adjusting member 5, the angle of the finishing edge 21 of the finishing blade 2 relative to the milling cutter body 7 can be adjusted. That is, the angle of the finishing edge 21 of the finishing blade 2 relative to the machined surface can also be adjusted, and the adjustment of the angle size is achieved through the adjustment amount of the adjusting member 5.

[0051] Preferably, β = 7°.

[0052] Further, in this embodiment, one end of the elastic deformation portion 4 is correspondingly connected to the second side positioning surface 113, and the other end projects out towards the first side positioning surface 112. An extrusion deformation gap 13 is formed between the elastic deformation portion 4 and the tool holder body 1. The adjusting member 5 is threadedly connected to the tool holder body 1 and is extruded into the extrusion deformation gap 13.

[0053] Further, in this embodiment, as Figure 3 shown, the adjusting member 5 includes a tapered head 51 and a threaded post 52 which are fixedly connected. The threaded post 52 is threadedly connected to the tool holder body 1, and the tapered head 51 is extruded into the extrusion deformation gap 13. The adjustment of the angle of the finishing blade edge 21 of the finishing blade 2 relative to the machined surface is achieved by the amount of screwing-in of the adjusting member 5.

[0054] Further, in this embodiment, the two adjacent sides between the side surface where the blade mounting portion 11 of the tool holder body 1 is located and the first reference surface C are respectively set as the second reference surface A and the third reference surface B. Both the second reference surface A and the third reference surface B are perpendicular to the first reference surface C. The tool holder body 1 is accurately positioned on the milling cutter body 7 through the second reference surface A and the third reference surface B.

[0055] Since the adjusting member 5 realizes the rotational displacement (or deformation) of the blade mounting portion 11 (cantilever) through the tapered head 51, and the rotational displacement of the blade mounting portion 11 realizes the rotation of the finishing blade 2 through the angle β. Let the taper of the tapered head 51 of the adjusting member 5 be K, and the bottom positioning surface 111 has an included angle β with the first reference surface C. Then, after the adjusting member 5 rotates a displacement distance M, the moving distance of point G1 relative to point G2 = M * tan(K / 2) * tanE. Taking K = 15° and β = 7°, the moving distance of point G1 relative to point G2 = 0.016 * M. Thus, it can be seen that through two angle conversions, the millimeter-level moving distance of the adjusting member 5 can be converted into the micrometer-level movement of point G1, greatly improving the adjustment accuracy.

[0056] Further, in this embodiment, the side surfaces of the tool holder body 1 opposite to the second reference surface A and the third reference surface B are respectively set as the fourth reference surface D and the fifth reference surface E. The fourth reference surface D is parallel to the second reference surface A, and the fifth reference surface E is parallel to the third reference surface B. The bottom positioning surface 111 intersects with the fourth reference surface D and the fifth reference surface E. That is to say, the tool holder body 1 is formed by machining on a cuboid. The first reference surface C, the second reference surface A, the third reference surface B, the fourth reference surface D, and the fifth reference surface E are five faces of the cuboid.

[0057] Further, in this embodiment, a screw hole 14 is provided on the tool holder body 1. The screw hole 14 penetrates through the intersection line of the fourth reference surface D and the fifth reference surface E and the second reference surface A. The screw hole 14 is used for the locking screw to pass through to lock the tool holder body 1 on the milling cutter body 7.

[0058] Further, in this embodiment, the third line 1132 is closer to the second reference plane A than the second line 1131. The finishing blade 2 is positioned on the side in the blade mounting portion 11 by relying on the first line 1121, the second line 1131, and the third line 1132, and is positioned by fitting the lower surface 211 onto the bottom positioning surface 111 of the blade mounting portion 11.

[0059] When the adjusting member 5 is not installed, the gap of the extrusion deformation joint 13 is very small. The distance from the point G1 on the finishing blade 2 to the first reference plane C is less than the distance from the point G2 to the first reference plane C. At this time, the angle between the finishing edge 21 of the finishing blade 2 and the tool holder body 1 deviates far from the normal value, and the tool holder body 1 cannot be used. After screwing the adjusting member 5 into the extrusion deformation joint 13 for a certain distance in advance, the angle of the finishing edge 21 of the finishing blade 2 is adjusted to an appropriate angle close to use, and then adjusted according to the actual situation. That is, during the use of the tool holder body 1, the adjusting member 5 is always subjected to the extrusion force brought by the elastic deformation of the elastic deformation portion 4, thereby ensuring the stable positioning of the adjusting member 5.

[0060] Embodiment 2:

[0061] Figures 1 to 8 Another embodiment of the adjustable tool holder of the present invention is also shown. The structure of this embodiment is basically the same as that of Embodiment 1, except that: the blade mounting portion 11 is provided with a finishing blade 2 through a mounting screw 3. The mounting screw 3 passes through the center of the finishing blade 2 and is connected to the center positioning portion 114. The finishing blade 2 includes a lower surface 211, an upper surface 214, and a first side surface 212 and a second side surface 213 that are connected between the lower surface 211 and the upper surface 214 and are adjacent to each other. The lower surface 211 contacts the bottom positioning surface 111, the first side surface 212 is in line contact with the first side positioning surface 112, the second side surface 213 is in line contact with both the second side positioning surface 113 and the third positioning surface 41, and the upper surface 214 has a finishing edge 21 on the side away from the second side surface 213.

[0062] When the adjusting member 5 further presses the elastic deformation portion 4, as Figure 2As shown, the elastic deformation part 4 undergoes a rotational displacement to the right, while the basic position of the second side positioning surface 113 remains unchanged. Under the extrusion of the elastic deformation part 4, the finishing blade 2 will rotate clockwise. Taking two points G1 and G2 on the finishing blade 2 as references, G1 moves a certain distance to the right relative to G2, and this distance is approximately equal to the displacement of the elastic deformation part 4. It should be noted that: since the first side positioning surface 112 and the second side positioning surface 113 of the blade mounting part 11 are curved surfaces, while the first side surface 212 and the second side surface 213 of the finishing blade 2 are flat surfaces; therefore, when the finishing blade 2 rotates, the contact between the finishing blade 2 and each side positioning surface is still a line contact, and the position of the contact line is very close to the position of the contact line when the finishing blade 2 does not rotate. Therefore, it basically does not affect the positioning of the finishing blade 2 and the eccentric direction of the mounting screw 3. On the contrary: if each side positioning surface is a flat surface, then the corresponding side surface of the finishing blade 2 and the side positioning surface of the blade mounting part 11 are surface contacts, they are parallel and the distance is zero. When the finishing blade 2 rotates, they are no longer parallel, the contact becomes a line contact, and the position of the contact line is at one end of the side positioning surface of the blade mounting part 11. At this time, it will seriously affect the positioning accuracy and cause the eccentricity of the mounting screw 3 to be too large.

[0063] Embodiment Three:

[0064] Figure 9 An embodiment of the milling cutter tool of the present invention is shown. The milling cutter tool of this embodiment includes a milling cutter body 7 having a rotation axis X. One or more cutting blades 71 and the adjustable tool holder of Embodiment Two are provided on the circumferential side of the milling cutter body 7. An adjusting mechanism 8 for moving and adjusting the tool holder body 1 along the rotation axis X is provided on the milling cutter body 7, and a locking screw 6 is provided in the screw hole 14.

[0065] Since the bottom positioning surface 111 has an angle β with the first reference plane C, in Figure 2 while point G1 moves to the right, it also undergoes a displacement in the direction perpendicular to the first reference plane C, specifically away from the first reference plane C, that is, point G1 is farther away from the first reference plane C relative to point G2. The finishing blade 2 rotates clockwise, that is, the finishing edge 21 of the finishing blade 2 rotates clockwise relative to the tool holder body 1. The tool holder body 1 is fixed on the milling cutter body 7 and is stationary when the adjusting mechanism 8 is not adjusted. It can be seen that by adjusting the adjusting member 5, the angle of the finishing edge 21 of the finishing blade 2 relative to the milling cutter body 7 can be adjusted. That is, the angle of the finishing edge 21 of the finishing blade 2 relative to the machined surface can also be adjusted, and the adjustment of the angle size is achieved by the adjustment amount of the adjusting member 5.

[0066] This milling cutter tool includes an adjustable tool holder and has all the advantages of the adjustable tool holder.

[0067] The milling cutter body 7 is a rotating body centered on the rotation axis X. One or more cutting inserts 71 and a tool holder body 1 are arranged on the circumference of the milling cutter body 7. The finishing insert 2 is fixed to the upper part of the tool holder body 1 by mounting screws 3. The adjusting mechanism 8 can move the tool holder body 1 in the direction of the axis X, thereby driving the finishing insert 2 to move in the direction of the axis X. In actual use, generally, the finishing insert 2 needs to be moved relative to the bottom surface 72 of the milling cutter body 7 to a position 0.01 mm to 0.2 mm higher than the cutting insert 71, that is: in the direction of the axis X, the finishing edge 21 of the finishing insert 2 is further away from the bottom surface 72 of the milling cutter body 7 than the cutting insert 71. Thus, when the milling cutter is working, after the cutting insert 71 processes the workpiece, the finishing insert 2 can perform a micro-cutting on the machined surface again. By utilizing the characteristics that the length of the finishing edge 21 of the finishing insert 2 is long and parallel to the machined surface, the quality of the machined surface can be improved.

[0068] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. An adjustable tool holder, comprising a tool holder body (1), characterized in that: One side of the tool holder body (1) is provided with a blade mounting part (11). The blade mounting part (11) includes a bottom positioning surface (111), a first side positioning surface (112) and a second side positioning surface (113) which are respectively located on two adjacent sides of the bottom positioning surface (111). A center positioning part (114) for positioning the center of the finishing blade (2) is arranged in the middle of the bottom positioning surface (111). Both the first side positioning surface (112) and the second side positioning surface (113) protrude into the blade mounting part (11) for line contact with the corresponding sides of the positioning finishing blade (2). An elastic deformation part (4) and an adjusting component (5) for rotating the elastic deformation part (4) into the blade mounting part (11) are arranged on the tool holder body (1). A third positioning surface (41) is arranged on the side of the elastic deformation part (4) facing into the blade mounting part (11). The third positioning surface (41) protrudes into the blade mounting part (11) for positioning with the same side of the second side positioning surface (113) of the positioning finishing blade (2).

2. The adjustable tool holder according to claim 1, characterized in that: The first side positioning surface (112), the second side positioning surface (113) and the third positioning surface (41) are all perpendicular to the bottom positioning surface (111).

3. The adjustable tool holder according to claim 2, wherein: One side surface of the tool holder body (1) opposite to the blade mounting part (11) is set as the first reference surface C. The bottom positioning surface (111) has an included angle β with the first reference surface C, and the distance between the side of the bottom positioning surface (111) far from the second side positioning surface (113) and the first reference surface C is farther than the distance between the side close to the second side positioning surface (113) and the first reference surface C.

4. The adjustable tool holder according to claim 3, wherein: 5°≤β≤11°。 5. The adjustable tool holder according to claim 4, wherein: β=7°。 6. The adjustable tool holder according to claim 1, wherein: One end of the elastic deformation part (4) is correspondingly connected to the second side positioning surface (113), and the other end projects out towards the direction of the first side positioning surface (112). An extrusion deformation gap (13) is formed between the elastic deformation part (4) and the tool holder body (1). The adjusting component (5) is threadedly connected to the tool holder body (1) and is extruded in the extrusion deformation gap (13).

7. The adjustable tool holder according to claim 6, characterized in that: The adjusting component (5) includes a tapered head (51) and a threaded column (52) which are fixedly connected. The threaded column (52) is threadedly connected to the tool holder body (1), and the tapered head (51) is extruded in the extrusion deformation gap (13).

8. The adjustable tool holder according to claim 3, characterized in that: Two adjacent side surfaces between the side surface of the tool holder body (1) where the blade mounting part (11) is located and the first reference surface C are respectively set as the second reference surface A and the third reference surface B. Both the second reference surface A and the third reference surface B are perpendicular to the first reference surface C.

9. The adjustable tool holder according to claim 8, wherein: The side surfaces of the tool holder body (1) opposite to the second reference surface A and the third reference surface B are respectively set as the fourth reference surface D and the fifth reference surface E. The fourth reference surface D is parallel to the second reference surface A, the fifth reference surface E is parallel to the third reference surface B, and the bottom positioning surface (111) intersects with the fourth reference surface D and the fifth reference surface E.

10. The adjustable tool holder according to claim 9, characterized in that: A screw hole (14) is arranged on the tool holder body (1). The screw hole (14) penetrates through the intersection line of the fourth reference surface D and the fifth reference surface E and the second reference surface A.

11. The adjustable tool holder according to any one of claims 1 to 10, characterized in that: The first side positioning surface (112), the second side positioning surface (113) and the third positioning surface (41) are all arc surfaces.

12. The adjustable tool holder according to claim 10, characterized in that: The blade mounting portion (11) is provided with a finishing blade (2) through a mounting screw (3). The mounting screw (3) passes through the center of the finishing blade (2) and is connected to the center positioning portion (114). The finishing blade (2) includes a lower surface (211), an upper surface (214), and a first side surface (212) and a second side surface (213) which are connected between the lower surface (211) and the upper surface (214) and are adjacent. The lower surface (211) contacts the bottom positioning surface (111), the first side surface (212) is in line contact with the first side positioning surface (112), the second side surface (213) is in line contact with both the second side positioning surface (113) and the third positioning surface (41), and a finishing edge (21) is provided on one side of the upper surface (214) away from the second side surface (213).

13. A milling cutter tool, characterized in that: It includes a milling cutter body (7) having a rotation axis X. One or more cutting blades (71) and the adjustable tool holder described in claim 12 are provided on the circumferential side of the milling cutter body (7). An adjusting mechanism (8) for moving and adjusting the tool holder body (1) along the rotation axis X is provided on the milling cutter body (7), and a locking screw (6) is provided in the screw hole (14).

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