CN106975780B - A kind of milling cutter having from substrate hold-down function - Google Patents

Abstract

A milling tool with self-compressing function of the present invention, the blade position adjustment assembly includes an adjustment wedge and a driving screw, the adjustment wedge is located in the adjustment wedge groove, and the adjustment wedge includes a wedge top surface, a wedge bottom surface, a wedge The left side of the wedge, the right side of the wedge, the front of the wedge and the back of the wedge, the top surface of the wedge is the wedge surface, and there is an acute angle α between the right side of the wedge and the bottom surface of the wedge. The top surface and the bottom surface of the wedge, the right side of the wedge has a first slope, the first slope and the left side of the wedge have an acute angle β, the adjustment wedge groove includes the bottom surface of the wedge groove, the left side of the wedge groove and the right side of the wedge groove, the wedge The bottom surface is in contact with the bottom surface of the wedge groove for positioning, the left side of the wedge is in contact with the left surface of the wedge groove for positioning, the right side of the wedge groove has a second slope, the second slope is in contact with the first slope, and there is a gap between the second slope and the left side of the wedge groove. Acute angles γ, β and γ all shrink towards the front of the wedge, γ≤β. The invention is convenient to adjust and does not need to separately compress the adjustment wedge.

Description

A milling cutter with self-pressing function

technical field

The invention relates to the technical field of metal cutting, in particular to a milling cutter with self-pressing function.

Background technique

In order to improve the surface quality of the face milling tool, the tool is often designed as an adjustable structure, so as to improve the precision of the tool. As shown in Figures 1 to 3, the basic structure of existing face milling tools often includes a cylindrical milling cutter body 1 and cutting inserts 2 distributed in the peripheral sipes of the cutter body 1 around the center of rotation of the cutter body 1 and their pressure. Tight wedge 31, adjustment wedge 41, drive screw 42, adjustment wedge compression wedge 13, adjustment wedge compression wedge stud screw; adjustment wedge 41 comprises a bottom surface, and the top that is opposite to the bottom surface and is inclined to set There are threaded holes running through the front and back surfaces, as well as the left and right sides, the front and the back; Adjusting wedge compression wedge 13), the front, are opposite to the bottom surface, left side, right side, front of adjusting wedge 41 respectively.

During adjustment, the drive screw 42 drives the adjustment wedge 41 to move axially along the threaded hole, because its inclined surface contacts the cutting blade and is inclined to the direction of movement of the adjustment wedge, thereby pushing the cutting blade to move axially or radially in the cutter body to achieve purpose of adjustment. After the adjustment is in place, the adjustment wedge 13 is pressed by the adjustment block to compress the adjustment wedge 41 to ensure that the left and bottom surfaces of the adjustment wedge 41 are fitted with the left and right sides of the knife groove of the knife body, and the position of the adjustment wedge is fixed, while preventing the During the cutting process, adjusting the slack of the wedge affects the positioning height of the cutting blade.

In order to make the adjustment wedge 41 move axially in the wedge groove (the part of the knife groove used to install the adjustment wedge), there is always a certain distance between the rear end surface of the adjustment wedge and the end surface of the wedge groove, and the distance The size varies from time to time due to the position of the adjusting wedge in the wedge groove.

The above adjustment method has the following disadvantages:

1) Adjusting the wedge and pressing the wedge 13 and its double-headed screw increases the user's product inventory;

2) Due to the existence of the adjusting wedge, the pressing wedge and its double-headed screw, the cutter body groove also needs to be provided with a corresponding pressing groove and threaded hole, which increases the difficulty of manufacturing the cutter body;

3) There are many steps in the process of adjusting the tool, and it takes a long time to adjust the tool;

4) The initial position of the adjustment wedge is uncertain, so the position of the inclined surface is uncertain, and the position of the blade in contact with it is also uncertain. The range of the initial height difference between each blade is not controlled. When it is large, the adjustment time will be prolonged.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a milling cutter with self-pressing function which simplifies the blade adjustment steps, saves the cutter adjustment time, and simplifies the adjustment structure.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A milling cutter with self-pressing function, comprising a cutter body, a cutting blade, a pressing assembly and a blade position adjustment assembly, the cutter body is provided with a blade groove and an adjusting wedge groove, and the cutting blade passes through the pressing assembly Installed in the blade groove, the blade position adjustment assembly includes an adjustment wedge and a driving screw that can drive the adjustment wedge to move, the adjustment wedge is located in the adjustment wedge groove, and the adjustment wedge includes wedge top, wedge bottom, wedge left, wedge right, wedge front and wedge The front of the wedge and the rear of the wedge are threadedly fitted with the cutter body. There is an acute angle α between the right side of the wedge and the bottom of the wedge. The top surface of the wedge and the bottom surface of the wedge. The right side of the wedge has a first slope. In a section parallel to the bottom surface of the wedge, there is an acute angle β between the first slope and the left side of the wedge. The acute angle β is directed to The front of the wedge shrinks, and the adjustment wedge groove includes the bottom surface of the wedge groove, the left surface of the wedge groove and the right surface of the wedge groove. Contact positioning, the right side of the wedge groove has a second slope, the second slope is positioned in contact with the first slope, in a section parallel to the bottom surface of the wedge groove, the distance between the second slope and the left side of the wedge groove There is an acute angle γ between them, and the acute angle γ shrinks toward the front of the wedge, γ≤β.

As a further improvement of the above technical solution:

The first inclined surface is close to the rear of the wedge, and the right side of the wedge also includes a first plane close to the front of the wedge, and in a section parallel to the bottom surface of the wedge, the first plane is parallel to the left side of the wedge , the first plane intersects with the first slope to form an inner concave surface; the right side of the wedge groove also includes a second plane corresponding to the first plane, and in a section parallel to the bottom surface of the wedge groove, the second plane and The left side of the wedge groove is parallel, and the second plane intersects with the second slope to form an inner concave surface.

The adjusting wedge groove also includes the front of the wedge groove, the front of the wedge groove corresponds to the front of the wedge groove, and there is a certain gap between the front of the wedge groove and the front of the wedge groove. Threaded receiving holes for the drive screws.

One elongated groove is provided and is close to the right side of the wedge.

The elongated groove is parallel to the first slope.

45°≤α<90°, 5°≤β≤20°, γ=β.

The hole on the adjusting wedge through which the driving screw passes is a threaded hole, and the threaded hole is parallel to the bottom surface of the wedge and the left side of the wedge.

The adjusting wedge also includes a first right transition surface and a second right transition surface, the first right transition surface connects the top surface of the wedge with the right surface of the wedge, and the second right transition surface connects the bottom surface of the wedge with the wedge On the right, there is an obtuse angle δ1 between the first right transition surface and the top surface of the wedge, and an obtuse angle δ2 between the second right transition surface and the bottom surface of the wedge.

The pressing assembly includes a pressing wedge and a pressing driving screw, one end of the pressing driving screw is threadedly connected with the pressing wedge, and the other end is threaded with the cutter body, and the pressing wedge is matched with the cutting blade The surface is wedge surface.

The cutter body is a disc-shaped cutter body, and the cutting blades are provided in multiples, evenly arranged along the circumference of the cutter body.

Compared with the prior art, the present invention has the advantages of:

(1) In the milling cutter with self-compressing function of the present invention, driven by the driving screw, the adjustment wedge moves along the axial direction of the threaded hole, and the elongated groove is compressed to produce a reaction force to compress the adjustment wedge, so that the adjustment The left side of the wedge is in contact with the left side of the wedge groove. At the same time, since the first inclined surface forms an acute angle α with the bottom surface of the wedge, there is a component of the pressing force toward the bottom of the wedge groove so that the bottom of the wedge and the bottom of the wedge The bottom surface of the groove is close to each other, so that the adjustment wedge is pressed against the bottom surface of the wedge groove and the left side of the wedge groove to realize the self-tightening function of the adjustment wedge. Compared with the prior art, it is no longer necessary to re-press the adjustment wedge after it is adjusted in place, which simplifies the steps of adjusting the structure and adjusting the tool.

(2) The milling tool with self-compressing function of the present invention has no separate parts for compressing the adjustment wedge, the cutter body structure is simpler, and the manufacture is more convenient; the initial position of the adjustment wedge in the wedge groove (along the radial position of the cutter body) is fixed, so the axial position of the cutting blade is determined, and the height difference between the cutting blades is reduced, saving the tool adjustment time.

(3) In the milling tool with self-compressing function of the present invention, since there is an obtuse angle δ1 between the first right transition surface of the adjustment wedge and the top surface of the wedge, there is an obtuse angle δ2 between the second right transition surface and the bottom surface of the wedge In this way, the right side of the wedge of the adjustment wedge will not interfere with the top surface of the wedge or the bottom surface of the wedge when being squeezed, and will not affect the positioning of the adjustment wedge.

Description of drawings

Fig. 1 is a structural schematic diagram of a milling tool in the prior art.

Fig. 2 is a schematic diagram of pressing and adjusting the cutting blade in the prior art.

Fig. 3 is an E-E view in Fig. 1 .

Fig. 4 is a structural schematic diagram of a milling tool with self-pressing function of the present invention.

Fig. 5 is a structural schematic view of the pressing and adjustment of the cutting insert of the present invention.

Fig. 6 is a F-F view in Fig. 4 .

Fig. 7 is a schematic diagram of the three-dimensional structure of the adjustment wedge in the present invention.

Fig. 8 is a front view of the adjusting wedge in the present invention.

Fig. 9 is a top view of the adjusting wedge in the present invention.

Fig. 10 is a side view of the adjusting wedge in the present invention.

Fig. 11 is a structural schematic diagram of the adjustment wedge groove in the present invention.

Each label in the figure means:

1. Cutter body; 11. Blade groove; 14. Adjust wedge groove; 141. Front of wedge groove; 142. Bottom surface of wedge groove; 143. Left side of wedge groove; 144. Right side of wedge groove; 145. Second slope ; 146, second plane; 2, cutting blade; 3, pressing assembly; 31, pressing wedge; 32, pressing driving screw; 33, pressing wedge groove; 4, blade position adjustment assembly; 41, adjusting Wedge; 410, the first right transition surface; 411, the second right transition surface; 412, the top surface of the wedge; 413, the bottom surface of the wedge; 414, the left side of the wedge; 415, the right side of the wedge; 416, the front of the wedge; 417, the back of the wedge; 418, the first slope; 419, the first plane; 42, the driving screw; 5, the threaded hole; 6, the elongated groove; 7, the threaded receiving hole.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 4 to Fig. 11 have shown an embodiment of the milling tool with self-compressing function of the present invention, and this milling tool with self-compressing function comprises cutter body 1, cutting blade 2, pressing assembly 3 and blade position The adjustment assembly 4 is provided with a blade groove 11 and an adjustment wedge groove 14 on the cutter body 1, and the cutting blade 2 is installed in the blade groove 11 through a pressing assembly 3. The blade position adjustment assembly 4 includes an adjustment wedge 41 and a driving adjustment The drive screw 42 for wedge 41 to move, the adjustment wedge 41 is located in the adjustment wedge groove 14, and the adjustment wedge 41 includes wedge top surface 412, wedge bottom surface 413, wedge left side 414, wedge right side 415, wedge front 416 and the wedge back 417, the wedge top surface 412 is a wedge surface and cooperates with the cutting blade 2, the driving screw 42 passes through the wedge front 416 and the wedge back 417 and is screwed with the cutter body 1, and the wedge right side 415 and the wedge There is an acute angle α between the bottom surfaces 413, and at least one elongated groove 6 is provided on the rear surface 417 of the wedge. The elongated groove 6 runs through the top surface 412 of the wedge and the bottom surface 413 of the wedge. The right side 415 of the wedge has a first slope 418. In the section parallel to the wedge bottom surface 413, there is an acute angle β between the first slope 418 and the left side of the wedge 414, and the acute angle β shrinks toward the front 416 of the wedge. The adjustment wedge groove 14 includes the bottom surface 142 of the wedge groove, the left 143 and the right side of the wedge groove 144, the bottom surface of the wedge 413 is positioned in contact with the bottom surface of the wedge groove 142, the left side of the wedge 414 is positioned in contact with the left side of the wedge groove 143, and the right side of the wedge groove 144 has a second inclined surface 145, and the second inclined surface 145 is in contact with the left side of the wedge groove. The first inclined surface 418 is positioned in contact, and in a section parallel to the bottom surface 142 of the wedge groove, there is an acute angle γ between the second inclined surface 145 and the left side 143 of the wedge groove, and the acute angle γ shrinks toward the front 416 of the wedge, γ≤β.

In a specific application example, the hole on the adjustment wedge 41 through which the driving screw 42 passes can be a through hole or a threaded hole. When it is a through hole, the head of the driving screw 42 abuts against the rear surface 417 of the wedge 41 of the adjustment wedge 41 . In this embodiment, the hole on the adjustment wedge 41 through which the driving screw 42 passes is a threaded hole 5 , and the threaded hole 5 is parallel to the bottom surface 413 of the wedge and the left surface 414 of the wedge. The driving screw 42 is threadedly engaged with the threaded hole 5 and drives the adjustment wedge 41 to move. The acute angle α refers to the angle between the right side 415 of the wedge and the bottom 413 of the wedge in a section perpendicular to the axial direction of the threaded hole 5 .

In this embodiment, taking one elongated groove 6 as an example, in a section parallel to the bottom surface 413 of the wedge, the elongated groove 6 is parallel to the first slope 418 and is biased toward the right side 415 of the wedge. The cutting blade 2 is installed in the blade groove 11 of the cutter body 1, and the tangential end surface of the cutting blade 2 (the end surface along the tangential direction of the cutter body 1 is in contact with the side surface of the blade groove 11, and is pressed by the pressing assembly 3; the cutting blade 2 The axial bottom surface of the blade (along the axial direction of the cutter body 1) is in contact with the top surface 412 of the wedge. During adjustment, the cutting blade 2 is pushed by the top surface 412 of the wedge, and the cutting blade 2 moves axially toward the cutter body 1. At the same time, the driving screw 42 Driven, the adjustment wedge 41 moves axially along the threaded hole 5, and the elongated groove 6 is compressed to generate a reaction force to press the adjustment wedge 41, so that the left side 414 of the wedge 41 of the adjustment wedge 41 is aligned with the left side 143 of the wedge groove. At the same time, since the right side 415 of the wedge and the bottom surface 413 of the wedge form an acute angle α, there is a component force in the pressing force toward the bottom surface 142 of the wedge groove so that the bottom surface 413 of the wedge 41 and the bottom surface 142 of the wedge groove of the adjustment wedge 41 are aligned. In this way, both sides of the adjustment wedge 41 and the adjustment wedge groove 14 are compressed, which has a self-tightening function and does not need to be pressed by other pressing components. The positioning accuracy is high, the adjustment structure is simplified, and the product is streamlined. It saves inventory and reduces the difficulty of making knives.

In this embodiment, the cutter body 1 is a disk-shaped cutter body, and there are multiple cutting blades 2 arranged evenly along the circumference of the cutter body 1 . The blade grooves 11 and the adjustment wedge grooves 14 are connected as a whole.

In this embodiment, the adjustment wedge groove 14 also includes a wedge groove front 141, the wedge groove front 416 corresponds to the wedge groove front 141, and there is a certain gap between the wedge groove front 416 and the wedge groove front 141, and the gap is used for To adjust the movement of the wedge 41 , the front face 141 of the wedge groove is provided with a threaded receiving hole 7 for receiving the driving screw 42 .

In this embodiment, the first inclined surface 418 is close to the rear 417 of the wedge, and the right side 415 of the wedge also includes a first plane 419 close to the front 416 of the wedge. The left side 414 is parallel, and the first plane 419 and the first slope 418 are arranged side by side, and intersect to form an inner concave surface; the right side 144 of the wedge groove also includes a second plane 146 corresponding to the first plane 419. Similarly, when parallel to the In the section of the bottom surface 142 of the wedge groove, the second plane 146 is parallel to the left side 143 of the wedge groove, the second plane 146 is close to the front surface 141 of the wedge groove, the second plane 146 and the second slope 145 are arranged side by side, and intersect to form an inner concave surface , there is a small gap between the second plane 146 and the first plane 419 . The first plane 419 and the first slope 418 together constitute the right side 415 of the wedge. The second plane 146 and the second slope 145 jointly form the right side 144 of the wedge groove.

In specific application examples, 45°≤α<90°, 5°≤β≤20°, γ=β. In this embodiment, α=80°, γ=β=10°.

In this embodiment, the adjustment wedge 41 also includes a first right transition surface 410 and a second right transition surface 411, the first right transition surface 410 connects the wedge top surface 412 and the wedge right surface 415, and the second right transition surface 411 connects There is an obtuse angle δ1 between the wedge bottom surface 413 and the wedge right surface 415 , the first right transition surface 410 and the wedge top surface 412 , and an obtuse angle δ2 between the second right transition surface 411 and the wedge bottom surface 413 . The right side 415 of the wedge 41 of the adjustment wedge 41 will not interfere with the top surface 412 or the bottom surface 413 of the wedge when being squeezed, and will not affect the positioning of the adjustment wedge 41 .

In this embodiment, the compression assembly 3 includes a compression wedge 31 and a compression drive screw 32, one end of the compression drive screw 32 is threadedly connected to the compression wedge 31, and the other end is threaded to the cutter body 1, and the compression wedge 31 The face matched with the cutting insert 2 is a wedge face. The cutter body is provided with a compression wedge groove 33, and the compression wedge 31 is located in the compression wedge groove 33, and the compression wedge 31 cooperates with the tangential end surface of the cutting blade 2 (the end surface along the tangential direction of the cutter body 1) , the cutting blade 2 is compressed in the compression wedge groove 33, and the compression wedge groove 33, the blade groove 11 and the adjustment wedge groove 14 are connected as one.

working principle:

As shown in Figure 6, the initial position of the adjustment wedge 41 is determined by the position when the first slope 418 of the adjustment wedge 41 is in contact with the second slope 145 of the adjustment wedge groove 14. Driven by the drive screw 42, the adjustment wedge 41 moves along the axial direction of the threaded hole 5, and the elongated groove 6 is compressed to produce a reaction force to press the adjustment wedge 41, so that the left side 414 of the wedge 41 of the adjustment wedge 41 is attached to the left side 143 of the wedge groove. Both an inclined surface 418 and the first plane 419 form an acute angle α=80° with the wedge bottom surface 413, so there is a component force of the pressing force toward the wedge groove bottom surface 142, so that the wedge bottom surface 413 is in close contact with the wedge groove bottom surface 142 , so that the adjustment wedge 41 is pressed against the bottom surface 142 of the wedge groove 14 and the left side 143 of the wedge groove 143 to realize the self-pressing function of the adjustment wedge 41 . Compared with the prior art, it is no longer necessary to re-press the adjustment wedge 41 after it is adjusted in place, which simplifies the steps of adjusting the tool and saves the time for tool adjustment; moreover, the initial position of the adjustment wedge 41 can be determined, that is, shrinking The initial height difference between the cutting blades 2 is reduced, and adjustment time is saved.

In addition, because there is an obtuse angle δ1 between the first right transition surface 410 of the adjustment wedge 41 and the top surface 412 of the wedge, and there is an obtuse angle δ2 between the second right transition surface 411 and the bottom surface 413 of the wedge, so that the adjustment wedge 41 The right side 415 of the wedge will not interfere with the top surface 412 or the bottom surface 413 of the wedge when being squeezed, and will not affect the positioning of the adjustment wedge 41 .

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. A milling tool with a self-pressing function, including a cutter body (1), a cutting blade (2), a pressing assembly (3) and a blade position adjustment assembly (4), the cutter body (1) is provided with There are blade grooves (11) and adjustment wedge grooves (14), the cutting blade (2) is installed in the blade groove (11) through the pressing assembly (3), and the blade position adjustment assembly (4) It includes an adjustment wedge (41) and a driving screw (42) that can drive the adjustment wedge (41) to move, the adjustment wedge (41) is located in the adjustment wedge groove (14), and it is characterized in that: The adjustment wedge (41) includes a wedge top (412), a wedge bottom (413), a wedge left (414), a wedge right (415), a wedge front (416) and a wedge rear (417), The wedge top surface (412) is a wedge surface and cooperates with the cutting insert (2), and the drive screw (42) passes through the wedge front (416) and wedge rear (417) and cutter body (1) Thread fit, there is an acute angle α between the right side of the wedge (415) and the bottom surface of the wedge (413), and at least one elongated groove (6) is provided on the back of the wedge (417), the thin The long groove (6) runs through the top surface of the wedge (412) and the bottom surface of the wedge (413), and the right side of the wedge (415) has a first slope (418), in the section parallel , there is an acute angle β between the first slope (418) and the left side of the wedge (414), the acute angle β shrinks toward the front of the wedge (416), and the adjusting wedge groove (14) includes a wedge groove The bottom surface (142), the left side of the wedge groove (143) and the right side of the wedge groove (144), the bottom surface of the wedge (413) is in contact with the bottom surface of the wedge groove (142) The left side of the block groove (143) is positioned in contact, the right side of the wedge groove (144) has a second slope (145), and the second slope (145) is positioned in contact with the first slope (418), parallel to the wedge In the section of the bottom surface of the block groove (142), there is an acute angle γ between the second slope (145) and the left surface of the wedge groove (143), and the acute angle γ shrinks toward the front of the wedge (416), γ≤β. 2. The milling tool with self-compressing function according to claim 1, characterized in that: the first inclined surface (418) is close to the back of the wedge (417), and the right side of the wedge (415) also includes A first plane (419) close to the front face (416) of the wedge, in a section parallel to the bottom surface (413) of the wedge, said first plane (419) is parallel to the left side (414) of said wedge, said first A plane (419) intersects with the first slope (418) to form an inner concave surface; the right side of the wedge groove (144) also includes a second plane (146) corresponding to the first plane (419), parallel to the wedge groove In the section of the bottom surface (142), the second plane (146) is parallel to the left side of the wedge groove (143), and the second plane (146) intersects with the second slope (145) to form an inner concave surface. 3. The milling tool with self-compressing function according to claim 1, characterized in that: the adjustment wedge groove (14) also includes a wedge groove front (141), the wedge front (416) and The front of the wedge groove (141) corresponds, and there is a certain gap between the front of the wedge groove (416) and the front of the wedge groove (141). threaded receiving hole (7). 4. The milling tool with self-compressing function according to claim 1, characterized in that: one elongated groove (6) is provided and is close to the right side of the wedge (415). 5. The milling tool with self-compressing function according to claim 4, characterized in that: the elongated groove (6) is parallel to the first inclined plane (418). 6. The milling tool with self-compression function according to any one of claims 1 to 5, characterized in that: 45°≤α<90°, 5°≤β≤20°, γ=β. 7. The milling tool with self-compressing function according to any one of claims 1 to 5, characterized in that: the hole on the adjusting wedge (41) through which the driving screw (42) passes is threaded hole (5), and the threaded hole (5) is parallel to the bottom surface of the wedge (413) and the left surface of the wedge (414). 8. The milling tool with self-compressing function according to any one of claims 1 to 5, characterized in that: the adjustment wedge (41) also includes a first right transition surface (410) and a second right transition surface surface (411), the first right transition surface (410) connects the wedge top surface (412) and the wedge right surface (415), and the second right transition surface (411) connects the wedge bottom surface (413) and the wedge On the right side of the block (415), there is an obtuse angle δ1 between the first right transition surface (410) and the wedge top surface (412), and there is an obtuse angle δ1 between the second right transition surface (411) and the wedge bottom surface (413). Obtuse angle δ2. 9. The milling tool with self-pressing function according to any one of claims 1 to 5, characterized in that: the pressing assembly (3) includes a pressing wedge (31) and a pressing driving screw (32 ), one end of the compression drive screw (32) is threaded with the compression wedge (31), and the other end is threaded with the cutter body (1), and the compression wedge (31) is matched with the cutting blade (2) The face is a wedge face. 10. The milling tool with self-pressing function according to any one of claims 1 to 5, characterized in that: the cutter body (1) is a disc-shaped cutter body, and the cutting blades (2) are arranged in multiple , evenly arranged along the circumference of the cutter body (1).