Vibration suppression device for ball-end milling cutter

Abstract

The utility model relates to the technical field of milling cutter vibration suppression, and discloses a ball-end milling cutter vibration suppression device which comprises a milling cutter body and a compensation piece, a containing groove is formed in the milling cutter body, a damper spring is fixedly installed on the top of an inner cavity of the containing groove, a friction block is fixedly installed at one end of the damper spring, and the outer wall of the friction block is attached to the inner wall of the containing groove. The compensation piece is arranged outside the friction block and used for compensating a gap between the outer wall of the friction block and the inner wall of the containing groove, and the friction force between the friction block and the inner wall of the containing groove can be maintained when the friction block slides up and down. By arranging the compensation piece, a gap between the outer wall of the friction block and the inner wall of the containing groove can be compensated, so that the efficiency and stability of converting vibration energy generated by the milling cutter body into heat energy are improved, the friction block can effectively restrain vibration generated by the milling cutter body, and the precision of the milling cutter body during workpiece machining is improved; and adverse effects on subsequent use of the milling cutter body are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to milling cutter vibration suppression technical field especially relates to a ball head milling cutter vibration suppression device. BACKGROUND

[0002] Ball head milling cutter is a kind of common numerical control processing cutter, the end of the cutting part of ball head milling cutter is hemispherical, and the cutting edge covers the ball head part, so that multi-directional cutting can be realized, commonly 2 blades, 3 blades and 4 blades, mainly used for the precision milling of three-dimensional curved surface, die cavity and complex hub.

[0003] At present, ball head milling cutter is prone to vibration after colliding with the surface of ball head when processing the surface of ball head, especially in the case of long overhanging, improper cutting parameters or insufficient rigidity of process system, vibration will seriously affect the processing quality (such as surface vibration and dimensional error) and tool life, in order to reduce the vibration generated when ball head milling cutter processes workpiece, a spring is generally installed inside the tool bar in the prior art, one end of the spring is installed with a damping block (the outer wall of the damping block is attached to the inner wall of the tool bar), when ball head milling cutter processes workpiece and generates vibration, milling vibration is transmitted to the spring through the tool bar, at this time, the spring is compressed or stretched, so that the damping block slides up and down, when the damping block slides up and down, friction occurs between the damping block and the inner wall of the tool bar, due to the nonlinear characteristics (coulomb friction) of friction, the vibration amplitude of the tool bar can be inhibited, but after the damping block and the inner wall of the tool bar slide relative to each other for a long time, the damping block and the inner wall of the tool bar are prone to wear, thereby causing a gap between the damping block and the inner wall of the tool bar and changing the damping characteristics of the damping block, so that the damping block cannot effectively inhibit the vibration generated by the ball head milling cutter, the vibration amplitude of the ball head milling cutter is increased, the efficiency of converting the vibration energy generated by the ball head milling cutter into heat energy is reduced, the precision of the ball head milling cutter in processing workpiece is reduced, and the subsequent use of the ball head milling cutter is affected. SUMMARY

[0004] In order to make up for the above shortcomings, the utility model provides a ball head milling cutter vibration suppression device, which aims at improving the problems in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a ball head milling cutter vibration suppression device, comprising:

[0006] The milling cutter body is internally provided with a containing groove, a damping spring is fixedly installed at the top of the inner cavity of the containing groove, one end of the damping spring is fixedly installed with a friction block, and the outer wall of the friction block and the inner wall of the containing groove are attached to each other;

[0007] The compensation piece is arranged outside the friction block, and the compensation piece is used to compensate the gap between the outer wall of the friction block and the inner wall of the containing groove, so as to maintain the friction between the friction block and the inner wall of the containing groove when the friction block slides up and down.

[0008] As a further description of the above technical scheme:

[0009] The inner cavity bottom of the accommodating groove is fixedly installed with a pressing spring, the top of the pressing spring is fixedly connected with the bottom of the friction block.

[0010] As a further description of the above technical solution:

[0011] The compensation member comprises friction plates and sliding blocks, the outer wall of the friction block is annularly distributed and is provided with a plurality of placing grooves, the inner cavities of the plurality of placing grooves are slidably installed with the friction plates, and the inner walls of the plurality of placing grooves away from the opening ends are provided with sliding grooves, and the inner cavities of the plurality of sliding grooves are slidably installed with the sliding blocks fixedly connected with the side walls of the friction plates.

[0012] As a further description of the above technical solution:

[0013] The inner walls of the plurality of sliding grooves away from the opening ends are fixedly installed with extrusion springs, and one end of the extrusion spring is fixedly connected with one end of the sliding block.

[0014] As a further description of the above technical solution:

[0015] The side, away from the sliding block, of the plurality of friction plates is curvedly arranged, and the curvatures of the side, away from the sliding block, of the plurality of friction plates are the same as the curvature of the friction block.

[0016] As a further description of the above technical solution:

[0017] The inner cavities of the plurality of sliding grooves are fixedly installed with a plurality of limiting strips along the movable direction, the two sides of the plurality of sliding blocks are symmetrically provided with sliding grooves, the inner cavities of the plurality of sliding grooves are slidably installed with sliding plates, the inner walls of the sliding grooves are fixedly installed with return springs connected with one side of the sliding plates, one side of the sliding plate is fixedly installed with a plurality of clamping strips matched with the limiting strips, the side, close to the opening end of the sliding groove, of the limiting strip is arranged to be inclined, and the side, away from the friction plate, of the clamping strip is arranged to be inclined.

[0018] As a further description of the above technical solution:

[0019] The other two sides of the sliding block are fixedly installed with guide blocks, and the inner walls of the sliding grooves are provided with guide grooves matched with the guide blocks.

[0020] The utility model has the advantages of the following beneficial effects:

[0021] In the utility model, the compensation member is arranged to compensate the gap between the outer wall of the friction block and the inner wall of the accommodating groove, so that the friction force between the friction block and the inner wall of the accommodating groove can be maintained when the friction block slides up and down, the efficiency and stability of the vibration energy generated by the milling cutter body to heat energy are increased, the vibration generated by the milling cutter body can be effectively inhibited by the friction block, the precision of the milling cutter body when machining workpieces is improved, and the adverse effects caused by subsequent use of the milling cutter body are reduced. DRAWINGS

[0022] Figure 1 It is a perspective view of the utility model;

[0023] Figure 2 It is a sectional view of the utility model milling cutter body;

[0024] Figure 3 It is the assembly drawing of the utility model friction block and friction plate;

[0025] Figure 4 It is the assembly drawing of the utility model sliding block and reset spring;

[0026] Figure 5 It is the assembly drawing of the utility model sliding block and friction block;

[0027] Figure 6 It is the utility model Figure 5 The structure enlarged view of A place in the middle.

[0028] Legend:

[0029] 1, milling cutter body; 2, damping spring; 3, friction block; 4, friction plate; 5, top pressure spring; 6, guide block; 7, sliding block; 8, extrusion spring; 9, limit strip; 10, reset spring; 11, sliding plate; 12, clamping strip. Specific implementation

[0030] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0031] Referring to Figures 1-6 , the utility model provides an embodiment: a ball end milling cutter vibration suppression device, comprising:

[0032] Milling cutter body 1, internally provided with accommodating groove, the inner chamber top of accommodating groove is fixedly installed with damping spring 2, one end of damping spring 2 is fixedly installed with friction block 3, the outer wall of friction block 3 and the inner wall of accommodating groove mutually adhere, wherein when milling cutter body 1 is vibrated after processing workpiece, milling vibration is transmitted to damping spring 2 through tool bar, at this time, damping spring 2 is compressed or stretched, and friction block 3 slides up and down, when friction block 3 slides up and down, friction occurs with the inner wall of accommodating groove, and due to the nonlinear characteristics (Coulomb friction) of friction, the vibration amplitude of milling cutter body 1 can be suppressed (this is prior art, and no more detailed description is made here).

[0033] The inner cavity bottom of the accommodating groove is fixedly installed with a pressing spring 5, the top of the pressing spring 5 is fixedly connected with the bottom of the friction block 3, when the milling cutter body 1 processes the workpiece and causes the damping spring 2 to extend, the friction block 3 moves towards the pressing spring 5, at this time, the friction block 3 exerts pressure on the pressing spring 5, so that the pressing spring 5 is forced to compress, when the pressing spring 5 is in the contracted state, the friction block 3 moves reversely, at this time, the end of the pressing spring 5 connected with the friction block 3 moves, so that the pressing spring 5 resets and stretches, when the milling cutter body 1 rotates at high speed, the pressing spring 5 and the damping spring 2 alternately stretch or compress, the sensitivity and stability of the friction block 3 when moving along the inner cavity of the accommodating groove are improved.

[0034] The damping spring 2 and the pressing spring 5 are made of stainless steel material, the fatigue resistance of the damping spring 2 and the pressing spring 5 is improved, and the service life of the damping spring 2 and the pressing spring 5 is prolonged.

[0035] The outer wall of the friction block 3 is annularly distributed with a plurality of placing grooves, a plurality of friction plates 4 are slidingly installed in the inner cavities of the plurality of placing grooves, the side, away from the sliding block 7, of the plurality of friction plates 4 is curved, and the curvature of the side, away from the sliding block 7, of the plurality of friction plates 4 is the same as the curvature of the friction block 3, wherein the plurality of placing grooves are uniformly and annularly distributed along the outer wall of the friction block 3, the side, away from the sliding block 7, of the plurality of friction plates 4 is completely attached to the inner wall of the accommodating groove in the initial state (before the milling cutter body 1 is used), the contact area of the friction plate 4 and the accommodating groove is increased, and the friction force between the friction block 3 and the inner wall of the accommodating groove and the vibration suppression effect of the friction block 3 on the milling cutter body 1 are improved when the friction block 3 slides up and down.

[0036] The friction block 3 and the friction plate 4 are made of carbon fiber reinforced resin material, the friction coefficient of the friction block 3 and the friction plate 4 and the friction block 3 and the friction plate 4 and the wear resistance of the friction block 3 and the friction plate 4 are improved, and the service life of the friction block 3 and the friction plate 4 is prolonged.

[0037] The plurality of placing grooves are away from the inner wall of the opening end thereof and are provided with sliding grooves, a sliding block 7 fixedly connected with the side wall of the friction plate 4 is slidingly installed in the inner cavities of the plurality of sliding grooves, wherein the sliding groove can limit the sliding track of the sliding block 7, so that the sliding block 7 moves along the radial direction of the friction block 3, and the stability of the friction plate 4 is improved.

[0038] The other two sides of the sliding block 7 are fixedly installed with guide blocks 6, and the inner wall of the sliding groove is provided with guide grooves matched with the guide blocks 6, so that the sliding track of the sliding block 7 can be further limited through the cooperation of the guide groove and the guide block 6, and the left and right shaking of the sliding block 7 during movement is prevented.

[0039] Through the understanding of the prior art by the applicant, after the milling cutter body 1 is used for a long time, the long-time up-and-down sliding of the friction block 3 causes the wear of the outer wall of the friction block 3 and the side of the friction plate 4 away from the sliding block 7 and the inner wall of the accommodating groove, causing the gap between the outer wall of the friction block 3 and the side of the friction plate 4 away from the sliding block 7 and the inner wall of the accommodating groove, and reducing the friction between the outer wall of the friction block 3 and the side of the friction plate 4 away from the sliding block 7 and the inner wall of the accommodating groove, so that the vibration energy generated by the milling cutter body 1 is converted into heat energy with reduced efficiency, and the friction block 3 cannot effectively suppress the vibration generated by the milling cutter body 1.

[0040] In order to solve the above technical problems, when the milling cutter body 1 rotates at high speed, the sliding block 7 and the friction plate 4 move towards the inner wall of the accommodating groove under the action of centrifugal force at this time, the side of the friction plate 4 away from the sliding block 7 exerts a greater pressure on the inner wall of the accommodating groove, and is closely attached to the inner wall of the accommodating groove, thereby increasing the friction between the side of the friction plate 4 away from the sliding block 7 and the inner wall of the accommodating groove, thereby increasing the efficiency and stability of the vibration energy generated by the milling cutter body 1 being converted into heat energy, so that the friction block 3 can effectively suppress the vibration generated by the milling cutter body 1, improve the precision of the milling cutter body 1 when machining workpieces, and reduce the adverse effects of subsequent use of the milling cutter body 1.

[0041] The friction plate 4 and the sliding block 7 form a compensation part, which is used to compensate the gap between the outer wall of the friction block 3 and the inner wall of the accommodating groove, and can maintain the friction between the friction block 3 and the inner wall of the accommodating groove when the friction block 3 slides up and down.

[0042] The plurality of sliding grooves are fixedly installed with extrusion springs 8 away from the inner wall of the opening end thereof, one end of the extrusion spring 8 is fixedly connected with one end of the sliding block 7, and when the side of the friction plate 4 away from the sliding block 7 is flush with the outer wall of the friction plate 4, the extrusion spring 8 is in a compressed state, at this time, the extrusion spring 8 can always exert a pushing force on the friction plate 4 towards the inner wall of the accommodating groove, so that the friction plate 4 can also be in contact with the inner wall of the accommodating groove when the friction block 3 is in a static state, thereby limiting the friction block 3, avoiding the milling cutter body 1 exerting a greater pressure on the damping spring 2 and the pressing spring 5 in a static state, avoiding the damping spring 2 and the pressing spring 5 being subjected to extrusion by the friction block 3 for a long time and being fatigued, and further improving the service life of the damping spring 2 and the pressing spring 5.

[0043] Through the understanding of the prior art by the applicant, the milling cutter body 1 is in a static state or a high-speed rotating state, the extrusion spring 8 always exerts a pushing force on the sliding block 7, the extrusion spring 8 is always in a compressed state, and the extrusion spring 8 is prone to fatigue and local stress after a long time, and the extrusion spring 8 is prone to breakage. If the extrusion spring 8 breaks, the sliding block 7 cannot exert a pushing force, when the milling cutter body 1 is in a static state, one side of the friction plate 4 cannot be tightly attached to the inner wall of the accommodating groove, the damping spring 2 and the pressing spring 5 are subjected to extrusion by the friction block 3 for a long time, and fatigue occurs, when the milling cutter body 1 rotates quickly, the damping spring 2 and the pressing spring 5 cannot rebound and extend in time, and the sensitivity of the friction block 3 to slide up and down is reduced, thereby reducing the vibration suppression effect on the milling cutter body 1.

[0044] In order to solve the above technical problems, the inner cavities of the plurality of sliding grooves are fixedly installed with a plurality of limiting strips 9 on both sides along the movable direction, both sides of the plurality of sliding blocks 7 are symmetrically provided with sliding grooves, the inner cavities of the plurality of sliding grooves are slidably installed with sliding plates 11, the inner walls of the sliding grooves are fixedly installed with return springs 10 connected to one side of the sliding plates 11, one side of the sliding plates 11 is fixedly installed with a plurality of clamping strips 12 matched with the limiting strips 9, the limiting strips 9 are obliquely arranged near one side of the sliding groove opening end, and the clamping strips 12 are obliquely arranged away from one side of the friction plate 4. The distance between the adjacent two clamping strips 12 is the same as the distance between the adjacent two limiting strips 9, when the milling cutter body 1 rotates at high speed, the friction plate 4 and the sliding block 7 move towards the inner wall of the accommodating groove due to the large centrifugal force acting on the sliding block 7 and the friction plate 4, the clamping strips 12 move with the sliding block 7, at this time, the inclined end of the clamping strip 12 is in contact with the outer wall of the limiting strip 9, and the limiting strip 9 extrudes the clamping strip 12, at this time, the sliding plate 11 moves away from the limiting strip 9, and the return spring 10 is compressed, until the clamping strip 12 is separated from the limiting strip 9, so that the sliding block 7 moves towards the inner wall of the accommodating groove under the action of the centrifugal force, until the outer wall of the friction plate 4 is attached to the inner wall of the accommodating groove, at this time, the plurality of clamping strips 12 move between the adjacent two limiting strips 9, and the return spring 10 converts the stored elastic potential energy into the kinetic energy of the sliding plate 11, so that the clamping strip 12 moves between the adjacent two limiting strips 9, so as to limit the movement of the friction plate 4, when the milling cutter body 1 is in a static state, the outer wall of the friction plate 4 can be tightly attached to the inner wall of the accommodating groove, avoiding the fatigue of the damping spring 2 and the pressing spring 5 caused by the long-time extrusion of the friction block 3, further improving the service life of the damping spring 2 and the pressing spring 5, improving the sensitivity of the friction block 3 to slide up and down, and improving the vibration suppression effect on the milling cutter body 1.

[0045] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A ball-end-mill vibration suppression device, characterized by: The milling cutter body (1) is internally provided with a containing groove, the inner cavity top of the containing groove is fixedly installed with a damping spring (2), one end of the damping spring (2) is fixedly installed with a friction block (3), and the outer wall of the friction block (3) and the inner wall of the containing groove are mutually attached. A compensation part is arranged outside the friction block (3), and the compensation part is used for compensating the gap between the outer wall of the friction block (3) and the inner wall of the containing groove, so as to maintain the friction force between the friction block (3) and the inner wall of the containing groove when the friction block (3) slides up and down. The inner cavity bottom of the containing groove is fixedly installed with a pressing spring (5), the top of the pressing spring (5) and the bottom of the friction block (3) are fixedly connected.

2. A ball-end-mill vibration suppression device according to claim 1, characterized in that: The compensation part comprises a friction plate (4) and a sliding block (7), the outer wall of the friction block (3) is annularly distributed and provided with a plurality of placing grooves, the inner cavities of the plurality of placing grooves are slidably installed with the friction plates (4), and the inner walls of the opening ends of the plurality of placing grooves are provided with sliding grooves, the inner cavities of the plurality of sliding grooves are slidably installed with the sliding blocks (7) fixedly connected with the side walls of the friction plates (4).

3. The ball-end-mill vibration suppression apparatus of claim 1, wherein: One end of the pressing spring (5) and the bottom of the friction block (3) are fixedly connected.

4. A ball-end-mill vibration suppression device according to claim 3, characterized in that: The outer wall of the friction block (3) is annularly distributed and provided with a plurality of placing grooves, the inner cavities of the plurality of placing grooves are slidably installed with the friction plates (4), and the inner walls of the opening ends of the plurality of placing grooves are provided with sliding grooves, the inner cavities of the plurality of sliding grooves are slidably installed with the sliding blocks (7) fixedly connected with the side walls of the friction plates (4).

5. A device for suppressing vibrations of a ball-end mill according to claim 3, characterized in that: The outer wall of the friction block (3) is annularly distributed and provided with a plurality of placing grooves, the inner cavities of the plurality of placing grooves are slidably installed with the friction plates (4), and the inner walls of the opening ends of the plurality of placing grooves are provided with sliding grooves, the inner cavities of the plurality of sliding grooves are slidably installed with the sliding blocks (7) fixedly connected with the side walls of the friction plates (4).

6. A ball-end-mill vibration suppression device according to claim 3, characterized in that: The inner cavities of the plurality of sliding grooves are slidably installed with the sliding blocks (7) fixedly connected with the side walls of the friction plates (4).

7. A ball-end-mill vibration suppression device according to claim 6, wherein: The inner cavities of the plurality of sliding grooves are slidably installed with the sliding blocks (7) fixedly connected with the side walls of the friction plates (4). The inner cavities of the plurality of sliding grooves are slidably installed with the sliding blocks (7) fixedly connected with the side walls of the friction plates (4). The inner cavities of the plurality of sliding grooves are slidably installed with the sliding blocks (7) fixedly connected with the side walls of the friction plates (4). The inner cavities of the plurality of sliding grooves are slidably installed with the sliding blocks (7) fixedly connected with the side walls of the friction plates (4).

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