Self-adaptive numerical control machine tool vibration suppression device

Abstract

The invention relates to a self-adaptive numerical control machine tool vibration suppression device applied to the related technical field of machine tools, through the arrangement of a vibration suppression unit partially located underground, on one hand, the vibration condition of a machine tool can be monitored, and in the monitoring process, the vibration force of the machine tool can be synchronously converted into electric power and stored; the amplitude of high-frequency displacement generated by vibration of the machine tool can be monitored in real time, after the amplitude is too large, transposition of the electromagnetic column and the fixed sensing column can be controlled, electricity generated by vibration is utilized to enable the electromagnetic column to generate magnetism so as to adsorb the auxiliary follow-up column, the machine tool and the inner stabilizing lining plate poured underground are temporarily integrated, and then the stability of the machine tool is greatly improved; and the vibration amplitude is effectively inhibited, so that instant shutdown is effectively avoided, the influence on the machining efficiency is reduced, and meanwhile, the influence on the quality of a product being machined is reduced.

Description

Technical Field

[0001] The present invention relates to a vibration suppression device for a numerically controlled machine tool, and in particular to an adaptive vibration suppression device for a numerically controlled machine tool applied in the technical field related to machine tools. Background Art

[0002] Machine tools are an important carrier of the manufacturing industry. They are developing rapidly and are widely used, injecting new vitality into the development of the manufacturing industry. With the rapid development of modern mechanical manufacturing technology, higher requirements are put forward for the processing accuracy of various CNC machine tools. It is of great significance to adopt appropriate methods to improve the accuracy of machine tools. However, large machine tools will vibrate when working, and the vibration of the bed will be transmitted to the machine tool operating end through the adapter flange, affecting the processing accuracy of the product.

[0003] In the prior art, vibration sensors are generally used to monitor the vibration of machine tools. When the vibration amplitude exceeds the vibration threshold, an alarm is issued so that the staff can take corresponding measures to reduce the vibration. However, this method cannot directly perform relevant processing when abnormal vibration occurs, resulting in either direct shutdown of the machine after an abnormality occurs, affecting processing efficiency, or affecting the quality of the product being processed. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the prior art only monitors the vibration of the machine tool, but cannot perform relevant vibration suppression operations, which affects the processing efficiency and processing errors.

[0005] In order to solve the above problems, the present invention provides an adaptive vibration suppression device for CNC machine tools, comprising an inner stabilizing lining plate located directly below a CNC machine tool operating table and a plurality of vibration suppression units installed on the upper end of the inner stabilizing lining plate through an electric rotating shaft. A control center is also installed at the lower end of the machine tool operating table. The vibration suppression unit is connected to the control center signal. The inner stabilizing lining plate is fixedly buried in the ground below the CNC machine tool by concrete pouring. A plurality of circular holes are reserved during concrete pouring. The plurality of vibration suppression units are respectively located in the plurality of circular holes. The vibration suppression unit comprises a bottom plate and a vibration collecting column and a monitoring column arranged on the bottom plate. The vibration collecting column comprises an electromagnetic column fixedly connected to the upper end of the bottom plate, a main follower column fixedly connected to the lower end of the CNC machine tool operating table, and a piezoelectric module installed at the lower end of the main follower column, and the electromagnetic column and the piezoelectric module are in contact with each other. The monitoring column comprises a fixed sensing column fixedly connected to the upper end of the bottom plate, a secondary follower column fixedly connected to the lower end of the CNC machine tool operating table, and a plurality of vibration sensing units fixedly connected to the upper end of the fixed sensing column.

[0006] In the above-mentioned adaptive CNC machine tool vibration suppression device, through the setting of the vibration collection column and the monitoring column, on the one hand, the vibration condition of the machine tool can be monitored, and during the monitoring process, the vibration force of the machine tool can be synchronously converted into electricity and stored; on the other hand, when the vibration amplitude is too large, the electricity converted from the vibration can be used as power to apply magnetic attraction to the entire machine tool, thereby suppressing the vibration of the machine tool, realizing automatic adaptive adjustment according to the vibration condition, effectively avoiding immediate shutdown, and reducing the impact on the quality of the products being processed.

[0007] As a further improvement of the present application, the vibration sensing unit includes multiple vibration sensing bars fixedly connected to the upper end of the fixed sensing column, and the multiple vibration sensing bars are all located on the outside of the auxiliary follower column. The outer diameter of the piezoelectric module is smaller than the minimum distance from the axis of the fixed sensing column to the surface of the vibration sensing bar.

[0008] As a further improvement of the present application, the upper ends of the electromagnetic column and the fixed sensing column are both higher than the ground, the upper ends of the multiple sensing bars are higher than the lower end of the monitoring column and lower than the lower end of the main follower column, the fixed sensing column and the auxiliary follower column do not contact each other, and the upper end of the electromagnetic column and the lower end of the auxiliary follower column are both on the same horizontal plane.

[0009] As a further improvement of the present application, when the fixed sensing column and the auxiliary follower column are coaxial when viewed from a top-down angle, the lines connecting the axes of the multiple vibration-sensing bars and the axis of the fixed sensing column are perpendicular to the surface of the auxiliary follower column, and the distances between the multiple vibration-sensing bars and the axis of the fixed sensing column are different.

[0010] As a further improvement of the present application, the vibration sensing strip is made of elastic material, a cavity is bored in the middle of the vibration sensing strip, and a laser emitter is installed at the bottom end of the cavity.

[0011] As another improvement of the present application, the vibration sensing unit includes a plurality of outer circle fixed columns and inner circle moving columns distributed in a circular array, a sensing piece fixedly connected between adjacent outer circle fixed columns and inner circle moving columns, and a follower rotating rod fixedly connected to the outer end of the inner circle moving column. The outer circle fixed column is fixedly connected to the upper end of the fixed sensing column, a through hole corresponding to the follower rotating rod is drilled on the outer circle fixed column, a center rotating rod is rotatably connected between the upper and lower inner walls of the through hole, the follower rotating rod is fixedly passed through the middle of the center rotating rod and extends to the outside of the through hole, and an angle sensor is installed on the end of the follower rotating rod away from the inner circle moving column.

[0012] As another improvement supplement of the present application, the lower end of the inner circle moving column is slidably connected to the fixed sensing column, and the center point of the sliding path coincides with the central axis of the outer circle fixed column, the center line of the outer circle fixed column and the corresponding inner circle moving column intersects with the central axis of the fixed sensing column, and the sensing piece is an elastic arc structure.

[0013] In summary, by setting up a vibration suppression unit partially located underground, on the one hand, the vibration of the machine tool can be monitored, and during the monitoring process, the vibration force of the machine tool can be synchronously converted into electricity and stored; on the other hand, the amplitude of the high-frequency displacement of the machine tool caused by vibration can be monitored in real time. When the amplitude is too large, the electromagnetic column and the fixed sensing column can be controlled to switch positions, and the electricity generated by the vibration can be used to make the electromagnetic column magnetic and then adsorb the auxiliary follower column, so that the machine tool and the inner stabilizing lining cast underground are temporarily integrated, thereby greatly improving the stability of the machine tool, effectively suppressing its vibration amplitude, and effectively avoiding immediate shutdown, reducing the impact on processing efficiency, and at the same time reducing the impact on the quality of the products being processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of the suppression device of the first embodiment of the present application when it is installed under the machine tool operating table; Figure 2 This is a front view of the suppression device of the first embodiment of the present application when it is installed under the machine tool operating table; Figure 3 A perspective view of a suppression device according to a first embodiment of the present application installed above the ground behind a machine tool; Figure 4 A three-dimensional diagram of a suppression device according to a first embodiment of the present application; Figure 5 A three-dimensional diagram of a vibration suppression unit according to a first embodiment of the present application; Figure 6 A top view of the monitoring column portion of the first embodiment of the present application; Figure 7 This is a comparison diagram of the first embodiment of the present application before and after the monitoring bar is deformed due to excessive vibration amplitude; Figure 8 This is a top view comparison diagram of the vibration suppression unit of the first embodiment of the present application before and after the vibration amplitude is too large; Fig. 9 This is a three-dimensional diagram of the partial position conversion of the monitoring column and the vibration collection column after the vibration amplitude is too large in the first embodiment of the present application; Fig.10 This is a top cross-sectional view of a vibration sensing unit in the second embodiment of the present application; Fig.11 This is a cross-sectional view of the outer circle column portion in the second embodiment of the present application; Fig.12 This is a cross-sectional view of the vibration sensing unit portion of the machine tool when vibrating in the second embodiment of the present application. Description of the numbers in the figure: 1 inner stabilizing lining plate, 2 bottom plate, 3 vibration collecting column, 31 electromagnetic column, 32 main follower column, 33 piezoelectric module, 4 monitoring column, 41 fixed sensing column, 42 auxiliary follower column, 5 vibration bar, 501 cavity, 502 laser emitter, 503 angle sensor, 51 outer circle fixed column, 52 sensing piece, 53 inner circle moving column, 54 follower rotating rod, 55 center rotating rod. DETAILED DESCRIPTION

[0015] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0016] The first implementation method: Figure 1-4 As shown, in the figure, a represents a CNC machine tool, and b represents the ground. An adaptive vibration suppression device for CNC machine tools includes an inner stabilizing lining plate 1 located directly below the CNC machine tool operating table and multiple groups of vibration suppression units installed on the upper end of the inner stabilizing lining plate 1 through an electric rotating shaft. A control center is also installed at the lower end of the machine tool operating table. The vibration suppression unit is connected with the control center signal. The inner stabilizing lining plate 1 is fixedly buried in the ground below the CNC machine tool by concrete pouring. Multiple circular holes are reserved during concrete pouring. Multiple vibration suppression units are respectively located in the multiple circular holes. The inner stabilizing lining plate 1 is more stable underground through concrete pouring. When the machine tool is temporarily integrated with it, it is not easy to vibrate due to the vibration of the machine tool, thereby effectively suppressing the vibration of the machine tool.

[0017] like Figure 5 The vibration suppression unit includes a base plate 2 and a vibration collection column 3 and a monitoring column 4 arranged on the base plate 2. The vibration collection column 3 includes an electromagnetic column 31 fixedly connected to the upper end of the base plate 2, a main follower column 32 fixedly connected to the lower end of the CNC machine tool operating table, and a piezoelectric module 33 installed at the lower end of the main follower column 32, and the electromagnetic column 31 and the piezoelectric module 33 are in contact with each other. The monitoring column 4 includes a fixed sensing column 41 fixedly connected to the upper end of the base plate 2, a secondary follower column 42 fixedly connected to the lower end of the CNC machine tool operating table, and a plurality of vibration sensing units fixedly connected to the upper end of the fixed sensing column 41. The secondary follower column 42 is made of ferromagnetic material. The vibration sensing unit includes a plurality of fixedly connected to the upper end of the fixed sensing column 41. The plurality of vibration-sensing strips 5 are all located on the outside of the auxiliary follower column 42. When vibrating, the vibration force can be effectively converted into electricity and stored through the setting of the piezoelectric module 33. It is worth noting that a battery module electrically connected to the electromagnetic column 31 can also be arranged at the lower end of the machine tool operating table. On the one hand, the battery module can store the electricity generated by the piezoelectric module 33 due to vibration, and on the other hand, it can supply power to the electromagnetic column 31. When the amplitude is too large, the electromagnetic column 31 and the fixed sensing column 41 can be replaced by the electric shaft, so that the electromagnetic column 31 can be energized to generate magnetism and then absorb the auxiliary follower column 42, so that the machine tool and the underground internal stabilizing lining plate 1 are temporarily integrated, thereby improving its stability and suppressing its vibration.

[0018] like Figure 2-3 The upper ends of the electromagnetic column 31 and the fixed sensing column 41 are both higher than the ground, the upper ends of the multiple vibration sensing bars 5 are higher than the lower end of the monitoring column 4 and lower than the lower end of the main follower column 32, and the fixed sensing column 41 and the auxiliary follower column 42 do not contact each other, so that when the machine tool is turned on and vibrates, the auxiliary follower column 42 can vibrate with a certain amplitude without interference. When the amplitude is large, it will contact one or more vibration sensing bars 5, causing the vibration sensing bars 5 to deform outwards, based on which the amplitude can be effectively judged. Figure 6 , in a top-down view, when the fixed sensing column 41 and the auxiliary follower column 42 are coaxial, the lines between the axes of the plurality of sensing bars 5 and the axes of the fixed sensing column 41 are perpendicular to the surface of the auxiliary follower column 42, and the distances between the axes of the plurality of sensing bars 5 and the fixed sensing column 41 are different, such as Figure 7 , c in the figure represents laser, the vibration sensing bar 5 is made of elastic material, a cavity 501 is cut in the middle of the vibration sensing bar 5, and a laser emitter 502 is installed at the bottom of the cavity 501. When the vibration sensing bar 5 is deformed outward, the light emitted by the laser emitter 502 will be projected on the inner wall of the cavity 501, instead of being set on the top of the cavity 501 as in the initial situation. At this time, the data obtained by the laser emitter 502 will be significantly smaller, and as the amplitude increases, the data will become smaller and smaller. At the same time, the number of laser emitters 502 that produce data changes will increase. When the vibration sensing bar 5 farthest from the axis of the fixed sensing column 41 is also deformed to make the corresponding laser emitter 502 data smaller, it can be said that the amplitude is too large. At this time, the control The center can control the electric shaft to rotate, so that the fixed sensing column 41 and the electromagnetic column 31 are exchanged, and then the electromagnetic column 31 is rotated to the bottom of the auxiliary follower column 42. At this time, the electromagnetic column 31 can be energized to generate magnetism, so that multiple electromagnetic columns 31 can synchronously generate magnetic attraction to multiple auxiliary follower columns 42, so that the two are temporarily integrated. Since the inner stabilizing lining plate 1 connected to the base plate 2 is poured below the ground through concrete, it has higher stability and can effectively play an auxiliary limiting role for the machine tool that establishes a stable connection with it through the vibration suppression unit, thereby effectively reducing the amplitude caused by vibration, thereby effectively reducing the impact on the quality of the product being processed, and achieving the effect of suppressing vibration.

[0019] The upper end of the electromagnetic column 31 and the lower end of the auxiliary follower column 42 are both on the same horizontal plane, so that when the amplitude is too large, the electromagnetic column 31 can contact the auxiliary follower column 42 after exchanging positions with the fixed sensing column 41, and can generate a stable adsorption force on it after power is turned on. The outer diameter of the piezoelectric module 33 is smaller than the minimum distance from the axis of the fixed sensing column 41 to the surface of the sensing bar 5, so that after the electromagnetic column 31 and the fixed sensing column 41 are exchanged, the piezoelectric module 33 is not easy to affect multiple sensing bars 5.

[0020] In the above-mentioned adaptive CNC machine tool vibration suppression device, through the setting of the vibration collection column 3 and the monitoring column 4, on the one hand, the vibration condition of the machine tool can be monitored, and during the monitoring process, the vibration force of the machine tool can be synchronously converted into electricity and stored; on the other hand, when the vibration amplitude is too large, the electricity converted from the vibration can be used as power to apply magnetic attraction to the entire machine tool, thereby suppressing the vibration of the machine tool, realizing automatic adaptive adjustment according to the vibration condition, effectively avoiding immediate shutdown, and reducing the impact on the quality of the products being processed.

[0021] The second implementation method: This embodiment is based on the first embodiment, and changes the arrangement of the vibration sensing unit, while the rest of the embodiment remains the same as the first embodiment.

[0022] Figure 10-11 As shown, the circular dotted line in the figure represents the sliding path of the inner circle moving column 53, the vibration sensing unit includes a plurality of outer circle fixed columns 51 and inner circle moving columns 53 distributed in a circular array, a sensing sheet 52 fixedly connected between adjacent outer circle fixed columns 51 and inner circle moving columns 53, and a follower rotating rod 54 fixedly connected to the outer end of the inner circle moving column 53, the outer circle fixed column 51 is fixedly connected to the upper end of the fixed sensing column 41, a through hole corresponding to the follower rotating rod 54 is drilled on the outer circle fixed column 51, a central rotating rod 55 is rotatably connected between the upper and lower inner walls of the through hole, the follower rotating rod 54 is fixedly penetrated through the middle of the central rotating rod 55 and extends to the outside of the through hole, an angle sensor 503 is installed at one end of the follower rotating rod 54 away from the inner circle moving column 53, the angle sensor 503 can set a threshold value according to actual needs, when the prefabrication is reached, it means that the amplitude is too large, when the amplitude is too large, the auxiliary follower column 42 vibrates with the bed, and then a certain high frequency of back and forth displacement occurs, such as Fig.12 At this time, it may hit the adjacent inner circle moving column 53, causing it to rotate. The setting of the arc-shaped sensing piece 52 allows it to vibrate in any direction. When the amplitude is too large to push one or two inner circle moving columns 53, the sensing piece 52 can adaptively deform, thereby driving the corresponding inner circle moving column 53 to slide.

[0023] The lower end of the inner circle moving column 53 is slidably connected to the fixed sensing column 41, and the center point of the sliding path coincides with the central axis of the outer circle fixed column 51. The center line connecting the outer circle fixed column 51 and the corresponding inner circle moving column 53 intersects with the central axis of the fixed sensing column 41. The sensing piece 52 is an elastic arc structure, so that it can adaptively deform when it is vibrated and squeezed by the auxiliary follower column 42, and it is not easy to limit the rotation of the inner circle moving column 53, thereby effectively ensuring that the data obtained by the angle sensor 503 can more accurately indicate the amplitude.

[0024] It is worth noting that the distance between two adjacent inner circle moving columns 53 is smaller than the diameter of the auxiliary follower column 42, so that when the machine tool vibration drives the auxiliary follower column 42 to move, when its vibration amplitude is large, the vibration in either direction can directly contact the inner circle moving column 53, so that the inner circle moving column 53 can respond faster and rotate around the center rotating rod 55, so that the follower rotating rod 54 rotates accordingly, and the data obtained by the angle sensor 503 is more accurate.

[0025] Compared with the monitoring method of multiple independent vibration-sensing bars 5 in the first embodiment, multiple outer circle fixed columns 51 and inner circle dynamic columns 53 are linked to each other in this embodiment, and the monitoring of the vibration amplitude is more comprehensive. It is not easy to cause a situation that is difficult to monitor due to changes in the vibration direction, and it is not easy to cause misjudgment of the vibration amplitude due to the uncertainty of the vibration direction.

[0026] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An adaptive vibration suppression device for CNC machine tools, characterized in that: The invention comprises an inner stabilizing lining plate (1) located directly below a numerical control machine tool operating table and a plurality of vibration suppression units installed on the upper end of the inner stabilizing lining plate (1) via electric rotating shafts. A control center is also installed at the lower end of the machine tool operating table. The vibration suppression units are connected to the control center by signal. The inner stabilizing lining plate (1) is fixedly buried in the ground below the numerical control machine tool by concrete pouring. A plurality of circular holes are reserved during the concrete pouring. The plurality of vibration suppression units are respectively located in the plurality of circular holes. The vibration suppression units comprise a bottom plate (2) and a vibration collecting column (3) arranged on the bottom plate (2). and a monitoring column (4), wherein the vibration collection column (3) comprises an electromagnetic column (31) fixedly connected to the upper end of a base plate (2), a main follower column (32) fixedly connected to the lower end of a numerical control machine tool operating table, and a piezoelectric module (33) installed at the lower end of the main follower column (32), and the electromagnetic column (31) and the piezoelectric module (33) are in contact with each other, and the monitoring column (4) comprises a fixed sensing column (41) fixedly connected to the upper end of the base plate (2), a secondary follower column (42) fixedly connected to the lower end of the numerical control machine tool operating table, and a plurality of vibration sensing units fixedly connected to the upper end of the fixed sensing column (41).

2. The adaptive vibration suppression device for CNC machine tools according to claim 1, characterized in that: The vibration sensing unit comprises a plurality of vibration sensing bars (5) fixedly connected to the upper end of a fixed sensing column (41), the plurality of vibration sensing bars (5) are all located outside the auxiliary follower column (42), and the outer diameter of the piezoelectric module (33) is smaller than the minimum distance from the axis of the fixed sensing column (41) to the surface of the vibration sensing bar (5).

3. The adaptive vibration suppression device for CNC machine tools according to claim 2, characterized in that: The upper ends of the electromagnetic column (31) and the fixed sensing column (41) are both above the ground, the upper ends of the plurality of vibration sensing bars (5) are higher than the lower end of the monitoring column (4) and lower than the lower end of the main follower column (32), the fixed sensing column (41) and the auxiliary follower column (42) are not in contact with each other, and the upper end of the electromagnetic column (31) and the lower end of the auxiliary follower column (42) are both on the same horizontal plane.

4. The adaptive vibration suppression device for CNC machine tools according to claim 1, characterized in that: In a top-down view, when the fixed sensing column (41) and the auxiliary follower column (42) are coaxial, the lines connecting the axes of the plurality of vibration sensing strips (5) and the axis of the fixed sensing column (41) are all perpendicular to the surface of the auxiliary follower column (42), and the distances between the axes of the plurality of vibration sensing strips (5) and the fixed sensing column (41) are different.

5. The adaptive vibration suppression device for CNC machine tools according to claim 4, characterized in that: The vibration sensing strip (5) is made of elastic material, a cavity (501) is bored in the middle of the vibration sensing strip (5), and a laser emitter (502) is installed at the bottom end of the cavity (501).

6. The adaptive vibration suppression device for CNC machine tools according to claim 1, characterized in that: The vibration sensing unit comprises a plurality of outer circle fixed columns (51) and inner circle moving columns (53) distributed in an annular array, a sensing sheet (52) fixedly connected between adjacent outer circle fixed columns (51) and inner circle moving columns (53), and a follower rotating rod (54) fixedly connected to the outer end of the inner circle moving column (53), the outer circle fixed column (51) being fixedly connected to the upper end of the fixed sensing column (41), a through hole corresponding to the follower rotating rod (54) being bored on the outer circle fixed column (51), a center rotating rod (55) being rotatably connected between the upper and lower inner walls of the through hole, the follower rotating rod (54) being fixedly passed through the middle of the center rotating rod (55) and extending to the outside of the through hole, and an angle sensor (503) being installed at one end of the follower rotating rod (54) away from the inner circle moving column (53).

7. The adaptive vibration suppression device for CNC machine tools according to claim 6, characterized in that: The lower end of the inner circle moving column (53) is slidably connected to the fixed sensing column (41), and the center point of the sliding path coincides with the center axis of the outer circle fixed column (51), the center line of the outer circle fixed column (51) and the corresponding inner circle moving column (53) intersects with the center axis of the fixed sensing column (41), and the sensing piece (52) is an elastic arc structure.

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