Damping milling cutter

Abstract

The utility model relates to a milling cutter and belongs to the technical field of milling cutters, in particular to a damping milling cutter which comprises a cutter bar, a cutter handle and a cutter head, the cutter head is fixedly mounted on the cutter handle, a mounting groove is formed in one side of the inside of the cutter bar, the cutter handle is movably mounted in the mounting groove, and a cushioning cavity is formed in the right side of the inside of the cutter bar. A mounting bearing is embedded and mounted in the cushioning cavity, a transmission shaft is fixedly mounted on an inner ring of the mounting bearing, one end of the transmission shaft is located in the mounting groove, a plurality of rotary vibration absorbers are fixedly connected to the position, located in the cushioning cavity, of the transmission shaft in a sleeving mode, and the multiple rotary vibration absorbers are distributed at equal intervals; threads are arranged on the transmission shaft in the mounting groove, and one end of the transmission shaft is located in the transmission screw groove; the milling cutter has the advantages that the milling cutter can be conveniently mounted, and damping and vibration absorption cannot be affected.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a damping and shock-absorbing milling cutter. Background Art

[0002] A turning tool is a tool with a cutting part used for turning processing and is one of the most widely used tools in cutting processing.

[0003] A Chinese patent with a search announcement number of CN106424781B discloses a boring tool. This patent aims to solve the problems in the prior art that the boring bar of a passive vibration-damping boring tool has a small adjustment range, is difficult to debug, and is difficult to repair and maintain, and the boring bar system of an active vibration-damping boring tool is complex, troublesome to repair and maintain, and complicated to operate. The patent comprises a tool bar, a tool head, and a blade. The tool bar comprises a fixed shaft, a filling liquid, and a plurality of rotary vibration absorbers. A cylindrical deep groove is machined at one end of the tool bar, a first blind hole is machined at the bottom of the cylindrical deep groove, a plurality of rotary vibration absorbers are sleeved on the fixed shaft, the blade is mounted on the tool head, a circular protrusion corresponding to the cylindrical deep groove is machined at one end of the tool head, and a second blind hole is machined on the circular protrusion, one end of the fixed shaft is inserted in the first blind hole, the tool head is mounted on the notch of the cylindrical deep groove, and the other end of the fixed shaft is inserted in the second blind hole, and the cylindrical deep groove is filled with filling liquid. This patent is used in the field of boring tool processing.

[0004] Based on the above search and combined with the prior art, we found that:

[0005] During the boring process, the boring bar is always in an overhanging state, resulting in low static stiffness of the boring bar and large deformation of the cutter head position. The tool exhibits periodic vibration characteristics during the processing. Once the cutting parameters are improperly selected, the vibration of the tool will be aggravated, and even chatter will occur. For this reason, the milling cutter needs to be damped. The existing technology for damping the milling cutter includes passive vibration damping tool bars, which mainly increase the static stiffness of the tool bar, adopt special shapes, and install vibration absorbers inside the tool bar. However, this damping method is more troublesome when installing the milling cutter, which affects the processing efficiency. Utility Model Content

[0006] In order to solve the above technical problems, the utility model proposes a damping and vibration-absorbing milling cutter, which is convenient for installing the milling cutter and does not affect the damping and vibration-absorbing effect.

[0007] The technical solution to achieve the purpose of the utility model is: a damping and shock-absorbing milling cutter, including a tool rod, a tool handle and a tool head, the tool head is fixedly installed on the tool handle, a mounting groove is opened on one side of the inner part of the tool rod, the tool handle is movably installed in the inner part of the mounting groove, a damping cavity is opened on the inner right side of the tool rod, a mounting bearing is inlaid and installed in the inner part of the damping cavity, a transmission shaft is fixedly installed on the inner ring of the mounting bearing, one end of the transmission shaft is located in the inner part of the mounting groove, a plurality of rotary vibration absorbers are fixedly sleeved at a position on the transmission shaft located in the damping cavity, and the plurality of rotary vibration absorbers are equidistantly distributed, a transmission screw groove is opened in the inner part of the tool handle, a thread is arranged on the transmission shaft at a position located in the inner part of the mounting groove, one end of the transmission shaft is located in the inner part of the transmission screw groove, the transmission shaft and the tool handle are connected by a transmission screw groove thread, a partition is fixedly installed in the damping cavity, the partition seals between the mounting groove and the damping cavity, and a fixing mechanism is arranged between the tool rod and the tool handle.

[0008] In some embodiments, the fixing mechanism includes a fixed groove, a first movable groove, a limit block, a second limit groove and a fixing bolt, the fixed groove is opened on the side wall of the knife handle, the first movable groove is opened on the inner wall of the knife rod at a position corresponding to the fixed groove, the limit block is movably installed inside the first movable groove, one end of the limit block is located inside the fixed groove, the second limit groove is opened on the outer wall of the knife rod at a position corresponding to the first movable groove, the fixing bolt is movably installed inside the second limit groove, and the bottom of the fixing bolt is movably installed inside the limit block through a thread.

[0009] In some embodiments, a liquid storage cavity is opened inside the knife rod at a position corresponding to the shock-absorbing cavity, and a liquid injection tube is embedded and installed on the outer wall of the knife rod at a position corresponding to the liquid storage cavity. The liquid injection tube is connected to the interior of the liquid storage cavity, and a sealing cover is movably installed on the liquid injection tube through a thread.

[0010] In some embodiments, a liquid inlet is provided inside the liquid storage chamber, and the liquid inlet connects the liquid storage chamber with the interior of the shock absorbing chamber, and a movable plate is movably installed inside the liquid inlet via a torsion spring shaft.

[0011] In some embodiments, a pressing block is movably installed inside the liquid storage chamber, the pressing block penetrates the side wall of the knife rod upward, and a return spring is installed at the bottom of the pressing block.

[0012] Compared with the prior art, the present invention has the following significant advantages:

[0013] The utility model sets a fixing mechanism and rotates the fixing bolt, which drives the limit block to move downward inside the first movable groove, so that the limit block moves to the inside of the fixed groove, so that the tool handle can be installed on the tool rod. When the tool handle moves inside the installation groove, the second limit groove and the limit block will also move inside the second limit groove and the first movable groove respectively, which will not affect the damping and vibration absorption effect, thereby achieving the goal of facilitating the installation of the milling cutter while not affecting the damping and vibration absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a schematic diagram of the main structure provided in one embodiment of the utility model;

[0016] Figure 2 It is a partial structural cross-sectional view provided in one embodiment of the utility model;

[0017] Figure 3 The utility model provides in one embodiment Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 The utility model provides in one embodiment Figure 2 Enlarged view of point B in the middle.

[0019] Description of reference numerals:

[0020] 1. Cutter bar; 2. Cutter handle; 3. Cutter head; 4. Mounting groove; 5. Shock-absorbing chamber; 6. Mounting bearing; 7. Transmission shaft; 8. Rotary vibration absorber; 9. Transmission screw groove; 10. Partition plate; 11. Fixed groove; 12. First movable groove; 13. Limit block; 14. Second limit groove; 15. Fixed bolt; 16. Liquid storage chamber; 17. Liquid injection tube; 18. Sealing cover; 19. Liquid inlet; 20. Movable plate; 21. Pressing block; 22. Reset spring. DETAILED DESCRIPTION

[0021] The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides a damping and shock-absorbing milling cutter through improvement. The technical solution of the utility model is:

[0023] like Figure 1 and Figure 2 As shown, a damping and shock-absorbing milling cutter comprises a tool rod 1, a tool handle 2 and a tool head 3, wherein the tool head 3 is fixedly mounted on the tool handle 2, a mounting groove 4 is provided on one side of the interior of the tool rod 1, the tool handle 2 is movably mounted inside the mounting groove 4, a damping cavity 5 is provided on the right side of the interior of the tool rod 1, the damping cavity 5 is a groove of a cylindrical structure, silicone oil is arranged inside the damping cavity 5, a mounting bearing 6 is inlaid and installed inside the damping cavity 5, the mounting bearing 6 is a cylindrical structure, a transmission shaft 7 is fixedly mounted on the inner ring of the mounting bearing 6, the transmission shaft 7 is a cylindrical structure, one end of the transmission shaft 7 is located inside the mounting groove 4, and a fixed sleeve is arranged at a position inside the damping cavity 5 on the transmission shaft 7 A plurality of rotary vibration absorbers 8 are connected, and the rotary vibration absorbers 8 are of a fan-shaped structure. The plurality of rotary vibration absorbers 8 are equidistantly distributed. A transmission screw groove 9 is provided inside the tool handle 2. The transmission screw groove 9 is a cylindrical groove with a thread inside. A thread is provided at a position inside the mounting groove 4 on the transmission shaft 7. One end of the transmission shaft 7 is located inside the transmission screw groove 9. The transmission shaft 7 and the tool handle 2 are threadedly connected through the transmission screw groove 9. A partition 10 is fixedly installed inside the damping cavity 5. The partition 10 is a circular plate. The partition 10 seals the mounting groove 4 and the damping cavity 5. The transmission shaft 7 passes through the side wall of the partition 10. A fixing mechanism is provided between the tool rod 1 and the tool handle 2.

[0024] like Figure 2 and Figure 3As shown, the fixing mechanism includes a fixed groove 11, a first movable groove 12, a limiting block 13, a second limiting groove 14 and a fixing bolt 15. The fixed groove 11 is a groove of a rectangular structure, and the fixed groove 11 is arranged on the side wall of the tool handle 2. The first movable groove 12 is a groove of a rectangular structure, and the first movable groove 12 is arranged on the inner wall of the tool rod 1 at a position corresponding to the fixed groove 11. The limiting block 13 is a block of a rectangular structure, and the limiting block 13 is movably installed inside the first movable groove 12, and one end of the limiting block 13 is located inside the fixed groove 11. The second limiting groove 14 is a groove of a cylindrical structure, and the second limiting groove 14 is arranged on the outer side wall of the tool rod 1 at a position corresponding to the first movable groove 12. The fixing bolt 15 is movably installed inside the second limiting groove 14, and the bottom of the fixing bolt 15 is movably installed inside the limiting block 13 through a thread. When the tool handle 2 is installed in the mounting groove 4, the tool handle 2 is subjected to force in the mounting groove 4 during cutting operation. The internal movement of the mounting groove 4, since the transmission shaft 7 is movably installed through the mounting bearing 6, and the transmission shaft 7 and the tool handle 2 are threadedly connected, the transmission shaft 7 will be driven to rotate, and the transmission shaft 7 drives the rotary vibration absorber 8 to rotate inside the shock-absorbing cavity 5, and then the vibration force is converted into kinetic energy of the rotary vibration absorber 8, which has a vibration absorption effect. At the same time, silicone oil is arranged inside the shock-absorbing cavity 5, and the rotary vibration absorber 8 will be affected by the silicone oil when rotating, which has a damping effect. At the same time, through the setting of the fixing mechanism, the fixing bolt 15 is rotated, and the fixing bolt 15 drives the limit block 13 to move downward inside the first movable groove 12, so that the limit block 13 moves to the inside of the fixed groove 11, so that the tool handle 2 can be installed on the tool rod 1, and when the tool handle 2 moves inside the mounting groove 4, the second limit groove 14 and the limit block 13 will also move inside the second limit groove 14 and the first movable groove 12 respectively, which will not affect the damping vibration absorption effect.

[0025] like Figure 2 and Figure 4 As shown, in one embodiment, a liquid storage chamber 16 is provided in the position corresponding to the shock absorbing chamber 5 in the interior of the knife bar 1. The liquid storage chamber 16 is a rectangular groove. A certain amount of silicone oil can be stored in the liquid storage chamber 16. A liquid injection tube 17 is inlaid and installed in the position corresponding to the liquid storage chamber 16 on the outer wall of the knife bar 1. The liquid injection tube 17 is a cylindrical tube. The liquid injection tube 17 is connected to the interior of the liquid storage chamber 16. Silicone oil can be added to the interior of the liquid storage chamber 16 through the liquid injection tube 17. A sealing member is movably installed on the liquid injection tube 17 through a thread. The sealing cover 18 can seal the inside of the liquid injection tube 17 and the liquid storage chamber 16. The liquid storage chamber 16 is provided with a liquid inlet 19, which is a rectangular groove. The liquid inlet 19 makes the liquid storage chamber 16 and the inside of the shock absorbing chamber 5 communicate with each other. The silicone oil in the liquid storage chamber 16 can be added into the shock absorbing chamber 5. The inside of the liquid inlet 19 is movably installed with a movable plate 20 through a torsion spring shaft. The movable plate 20 is a rectangular plate. The movable plate 20 can seal the inside of the liquid inlet 19.

[0026] A pressing block 21 is movably installed inside the liquid storage chamber 16. The pressing block 21 is a block of "T"-shaped structure. The pressing block 21 penetrates the side wall of the knife rod 1 upward. A return spring 22 is installed at the bottom of the pressing block 21, so that the pressing block 21 can be pressed downward outside the knife rod 1. The pressing block 21 will move downward inside the liquid storage chamber 16. Under the action of pressure, the silicone oil inside the liquid storage chamber 16 will squeeze the movable plate 20. After being squeezed, the movable plate 20 flips over, so that the silicone oil inside the liquid storage chamber 16 can enter the inside of the shock-absorbing chamber 5 to replenish the silicone oil inside the shock-absorbing chamber 5.

[0027] The specific working methods are:

[0028] When performing a cutting operation, the tool handle 2 is subjected to force and moves inside the mounting groove 4. Since the transmission shaft 7 is movably installed through the mounting bearing 6, and the transmission shaft 7 and the tool handle 2 are threadedly connected, the transmission shaft 7 will be driven to rotate, and the transmission shaft 7 drives the rotary vibration absorber 8 to rotate inside the shock absorbing cavity 5, thereby converting the vibration force into kinetic energy of the rotary vibration absorber 8, which has a vibration absorption effect. At the same time, silicone oil is arranged inside the shock absorbing cavity 5, and the rotary vibration absorber 8 will be affected by the silicone oil when rotating, which has a damping effect. At the same time, through the setting of the fixing mechanism, the fixing bolt 15 is rotated, and the fixing bolt 15 drives the limit block 13 to move downward inside the first movable groove 12, so that the limit block 13 moves to the inside of the fixed groove 11, so that the tool handle 2 can be installed on the tool rod 1. When the tool handle 2 moves inside the mounting groove 4, the second limit groove 14 and the limit block 13 will also move inside the second limit groove 14 and the first movable groove 12 respectively, which will not affect the damping vibration absorption effect.

[0029] The technical means disclosed in the utility model are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the utility model belong to the common knowledge of those skilled in the art.

Claims

1. A damping and vibration-absorbing milling cutter, comprising a tool bar (1), a tool handle (2) and a tool head (3), wherein the tool head (3) is fixedly mounted on the tool handle (2), and is characterized in that: A mounting groove (4) is provided on one side of the interior of the knife bar (1), the knife handle (2) is movably mounted inside the mounting groove (4), a damping cavity (5) is provided on the right side of the interior of the knife bar (1), a mounting bearing (6) is embedded and mounted inside the damping cavity (5), a transmission shaft (7) is fixedly mounted on the inner ring of the mounting bearing (6), one end of the transmission shaft (7) is located inside the mounting groove (4), a plurality of rotary vibration absorbers (8) are fixedly sleeved at a position on the transmission shaft (7) located inside the damping cavity (5), and the plurality of rotary vibration absorbers (8) are fixedly sleeved at a position on the transmission shaft (7) located inside the damping cavity (5). The tool handle (2) is provided with a transmission screw groove (9), a thread is provided on the transmission shaft (7) at a position located inside the mounting groove (4), one end of the transmission shaft (7) is located inside the transmission screw groove (9), the transmission shaft (7) and the tool handle (2) are connected by the transmission screw groove (9) thread, a partition plate (10) is fixedly installed inside the damping cavity (5), the partition plate (10) seals between the mounting groove (4) and the damping cavity (5), and a fixing mechanism is provided between the tool rod (1) and the tool handle (2).

2. A damping and vibration-absorbing milling cutter according to claim 1, characterized in that: The fixing mechanism comprises a fixing groove (11), a first movable groove (12), a limiting block (13), a second limiting groove (14) and a fixing bolt (15); the fixing groove (11) is arranged on the side wall of the knife handle (2); the first movable groove (12) is arranged on the inner wall of the knife rod (1) at a position corresponding to the fixing groove (11); the limiting block (13) is movably mounted inside the first movable groove (12); the second limiting groove (14) is arranged on the outer wall of the knife rod (1) at a position corresponding to the first movable groove (12); and the fixing bolt (15) is movably mounted inside the second limiting groove (14).

3. A damping and vibration-absorbing milling cutter according to claim 2, characterized in that: One end of the limit block (13) is located inside the fixing groove (11), and the bottom of the fixing bolt (15) is movably installed inside the limit block (13) through a thread.

4. The damping and vibration-absorbing milling cutter according to claim 1, characterized in that: A liquid storage chamber (16) is provided inside the knife rod (1) at a position corresponding to the shock absorbing chamber (5); a liquid injection tube (17) is embedded and installed on the outer wall of the knife rod (1) at a position corresponding to the liquid storage chamber (16); the liquid injection tube (17) is communicated with the inside of the liquid storage chamber (16); and a sealing cover (18) is movably installed on the liquid injection tube (17) via a thread.

5. A damping and vibration-absorbing milling cutter according to claim 4, characterized in that: The liquid storage chamber (16) is provided with a liquid inlet (19) which allows the liquid storage chamber (16) and the interior of the shock absorbing chamber (5) to communicate with each other. A movable plate (20) is movably installed inside the liquid inlet (19) via a torsion spring shaft.

6. The damping and vibration-absorbing milling cutter according to claim 4, characterized in that: A pressing block (21) is movably installed inside the liquid storage chamber (16), the pressing block (21) penetrates the side wall of the knife rod (1) upwards, and a return spring (22) is installed at the bottom of the pressing block (21).

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