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A particle damping vibration reduction machine tool

A particle damping, machine tool technology, applied in metal processing machinery parts, maintenance and safety accessories, metal processing equipment, etc., can solve the problems of machine tool system oscillation, difficult industrial application, poor vibration damping effect, etc., and achieve short processing and manufacturing cycles. , The manufacturing process is simple, and the effect of reducing the vibration amplitude

Inactive Publication Date: 2011-12-28
INST OF PROCESS ENG CHINESE ACAD OF SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When processing more complex curved surfaces, CAM programming software is generally used. For example, when using MasterCAM programming, some companies use less filtering or even no filtering in order to pursue higher precision or make mistakes in circular interpolation. The generated program is Very dense points, when processed on a CNC machine tool with poor acceleration, there will be a vibration phenomenon of jitter
[0004] 2) Vibration caused by electrical component failure
When a fault occurs and the feedback signal is unstable, the frequency converter or servo drive will make the motor continuously accelerate and decelerate according to the fluctuating frequency and voltage, thereby causing destructive vibration of the machine tool and increasing the indicator value of the machine tool load meter
[0005] 3) Vibration caused by mechanical failure
Resonance may occur at a certain speed of the machine tool. In addition, if the parameters of the machine tool are not set properly, it may also cause the machine tool system to vibrate, which will greatly reduce the service life of the machine tool.
[0007] 5) The anchor bolts of the machine tool are loose
Since the environmental conditions are not up to standard, when the X and Y axes of the machine tool move back and forth quickly, this unstable fixing method will seriously affect the accuracy of the CNC machine tool
[0008] The vibration control of large-scale precision CNC machine tools is a very complex system engineering. The main causes of vibration caused by the above five points cannot be completely avoided during the machining process of the machine tool. In the current commonly used passive vibration reduction technology, viscoelastic material damping and vibration reduction is The most widely used, because the viscoelastic material is very sensitive to temperature, at the same time, the viscoelastic material will become aging and other failures with the prolongation of use time, and the vibration damping effect will gradually deteriorate. Great limitations, difficult to achieve industrial applications

Method used

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Examples

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Effect test

Embodiment 1

[0038] In the particle damping bed structure of a large moving beam moving column 4×16m gantry milling machine, the particle damping vibration reduction bed 1 is composed of a cavity 2, damping particles 3 and particle sealing elements, etc., and the cavity is a semi-cylindrical cavity. Cavity, because the large-scale gantry milling machine body in the actual working state is in low fundamental frequency vibration, the direction of the vibration source acting on the machine bed is parallel to the direction of particle gravity, and the damping particle 3 is an external high-vibration-absorbing characteristic with a certain shape, the core High toughness composite particle material, the particle size is 0.8M / h 2 mm~3.5M / h 2 mm mixed gradation particles, the filling rate is 90%.

Embodiment 2

[0039] Example 2 In the particle damping top beam structure of a large-scale moving beam moving column 4×16 meters gantry milling machine, the particle damping vibration-damping top beam 4 is composed of a cavity 2, damping particles 3 and a particle sealing body, and the cavity is the middle For the reinforced cubic cavity, since the large gantry milling roof beam in the actual working state is close to the vibration source, it is in the middle fundamental frequency vibration, the direction of the vibration source acting on the machine bed is perpendicular to the direction of particle gravity, and the damping particles 3 have a certain Composite particle material with high vibration damping characteristics on the outside of the shape and high strength on the core, with a particle size of 4.5M / h 2 mm~7M / h 2 mm mixed gradation particles, the filling rate is 95%.

Embodiment 3

[0041] In the large-scale moving beam moving column 4×16m gantry milling machine particle damping column structure, the particle damping vibration-damping column 5 is composed of a cavity 2, damping particles 3 and a particle sealing body, and the cavity is a middle reinforcement and a transverse cylinder. Because the large gantry milling column in the actual working state is far away from the vibration source and is in low fundamental frequency vibration, the direction of the vibration source acting on the machine bed is perpendicular to the direction of gravity of the particles, and the damping particles 3 have a certain shape Composite particle material with high external vibration damping characteristics and high strength core, the particle size is 0.4M / h 2 mm~3.5M / h 2 mm mixed gradation particles, the filling rate is 90%.

[0042] After particle damping and vibration reduction are applied to the large-scale moving beam and moving column 4×16m gantry milling machine bed 1...

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Abstract

The invention relates to a particle damping and vibration reduction machine tool. The machine tool includes a machine tool structural part, a cavity (2) is arranged in the machine tool structural part, and damping particles (3) are sealed and filled in the cavity (2). The machine tool structural parts include a machine tool bed (1), a machine tool top beam (4), a machine tool column (5), a machine tool beam and a machine tool reinforcement beam. In the present invention, not only the steel plate welding technology is used to manufacture a large machine tool bed, but compared with the traditional casting processing technology, it has the advantages of relatively simple manufacturing process, short processing and manufacturing cycle, low cost, and saving metal materials; it can also significantly reduce the vibration of the machine tool amplitude, and has the advantages of small changes to the original structure and small additional mass, which not only ensures the machining accuracy of the machine tool, but also saves a lot of metal materials, reduces manufacturing costs, and plays the role of energy saving and emission reduction.

Description

technical field [0001] The invention relates to a vibration reduction machine tool, in particular, the invention relates to a particle damping vibration reduction machine tool. Background technique [0002] At present, the vibration of large precision CNC machine tools will directly affect the machining accuracy of the workpiece and shorten the service life of the machine tool. There are many factors that cause the vibration of CNC machine tools, and in most cases the machine tool has no alarm. In summary, there are mainly five aspects as follows: [0003] 1) Processing procedure. When processing more complex curved surfaces, CAM programming software is generally used. For example, when using MasterCAM programming, some companies use less filtering or even no filtering in order to pursue higher precision or make mistakes in circular interpolation. The generated program is Very dense points will produce jittering vibrations when processed on a CNC machine tool with slightly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q11/00
Inventor 肖望强段东平边贺川李威邓乐
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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