A machining center and a vibration reduction method capable of reducing workpiece vibration

Abstract

The application discloses a machining center capable of reducing workpiece vibration and a vibration reduction method. The machining center comprises a rack, an X-axis module, a Y-axis module, a Z-axis module, a machining spindle module, a tool magazine module and a control box. The Y-axis module is installed at a lower position of the rack. The X-axis module is arranged on the Y-axis module and is driven by the X-axis module. A stand is fixedly arranged on the rack. The control box is installed on one side of the stand, and the tool magazine module is installed on the other side of the stand. The Z-axis module and the machining spindle module are installed in the space between the tool magazine module and the stand. The Z-axis module drives the machining spindle module to move back and forth along the X-axis. The machining spindle module is located above the X-axis module. A vibration reduction device is installed on the machining spindle module. Air pressure is introduced into the vibration reduction device. The vibration of the machining tool is buffered by adjusting the pressure of the air pressure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of machining center, in particular to a machining center capable of reducing workpiece vibration and a vibration reduction method. BACKGROUND

[0002] With the rapid development of national defense industries such as aviation and aerospace, the requirements for high speed and high mobility of products such as aircraft and missiles are becoming higher and higher. Under the condition of ensuring strength and rigidity, lightweight and structural integration are the inevitable trend of the development of aerospace products. Thin-walled structural parts made of composite materials, titanium alloys and other materials have high strength, light weight and high bearing capacity, and have been widely used in the field of aerospace. In the machining process of thin-walled parts, due to its low rigidity, under the combined action of cutting force, cutting heat and cutting vibration, it is easy to produce machining deformation, which is difficult to ensure the machining precision and surface quality of the parts, and even causes the whole component to be scrapped, which seriously affects the overall machining efficiency. Therefore, high-precision machining has become an urgent demand for the machining and manufacturing of aerospace thin-walled parts.

[0003] At present, the most important factor affecting machining precision is the vibration generated in the machining process. The greater the vibration, the worse the precision. The vibration that cannot be eliminated limits the application of machining centers in the field of precision milling. SUMMARY

[0004] Therefore, the present application aims at the defects of the prior art, and the main purpose is to provide a machining center capable of reducing workpiece vibration and a vibration reduction method.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] A machining center capable of reducing workpiece vibration, comprising a rack, an X-axis module, a Y-axis module, a Z-axis module, a machining spindle module, a tool magazine module and a control box; the Y-axis module is installed at the lower position of the rack, the X-axis module is erected on the Y-axis module and is driven by the X-axis module; a vertical column is fixedly arranged on the rack, one side of the vertical column is installed with the control box, and the other side is installed with the tool magazine module; and the Z-axis module and the machining spindle module are installed in the space between the tool magazine module and the vertical column, the Z-axis module drives the machining spindle module to move back and forth along the X-axis, the machining spindle module is located above the X-axis module, and a vibration reduction device is installed on the machining spindle module.

[0007] As a preferred solution, the Y-axis module comprises a Y-axis base, a Y-axis motor, a Y-axis screw, two Y-axis linear rails, a plurality of Y-axis sliders and a sliding saddle, the Y-axis base has two pieces, which are respectively fixed to the bottom panel of the rack, and the Y-axis motor is fixed in the Y-axis motor mounting space between the two Y-axis bases; the output of the Y-axis motor is connected with the Y-axis screw, the two Y-axis linear rails are respectively fixed to the bottom panel of the rack, the Y-axis screw is located between the two Y-axis linear rails, the Y-axis linear rails are respectively matched with the Y-axis sliders, the Y-axis sliders are slidably mounted on the Y-axis linear rails, and the sliding saddle is mounted on the Y-axis sliders and driven by the Y-axis nut seat.

[0008] As a preferred solution, the X-axis module comprises an X-axis motor, an X-axis screw, an X-axis nut seat, two X-axis linear rails, a plurality of X-axis sliders and a machining workbench, the X-axis motor is fixed to the sliding saddle, the output of the X-axis motor is connected with the X-axis screw, the two X-axis linear rails are fixed to the sliding saddle at intervals, and the X-axis screw is located between the two X-axis linear rails; the X-axis linear rails are respectively matched with the X-axis sliders, the machining workbench is arranged on the X-axis sliders, and the machining workbench is driven by the X-axis nut seat.

[0009] As a preferred solution, the Z-axis module comprises a Z-axis motor, a Z-axis screw, two Z-axis linear rails and a plurality of Z-axis sliders, the Z-axis motor is fixed to the top of the column, the output of the Z-axis motor is connected with the Z-axis screw, the two Z-axis linear rails are vertically and equally spaced mounted on the column, and the plurality of Z-axis sliders are slidably matched with the Z-axis screw.

[0010] As a preferred solution, the machining spindle module comprises a spindle support, a spindle motor, a machining spindle and a tool holder, the spindle support is mounted on the Z-axis slider, the spindle support is driven by the Z-axis nut, the spindle motor is fixed to the spindle support, the output of the spindle motor is connected with the machining spindle, the machining spindle is provided with the tool holder for mounting a tool, one end of the tool holder for connecting the machining spindle is provided with a first absorber, the other end of the tool holder is provided with a second absorber, a third absorber and a fourth absorber through an absorber support, the first absorber acts on the tool holder, the second absorber, the third absorber and the fourth absorber jointly act on the machining tool, and the first absorber, the second absorber, the third absorber and the fourth absorber form a damping device.

[0011] As a preferred scheme, each absorber comprises a cylinder, a cylinder head, a piston, a first valve, a second valve, one end of the cylinder is fixed to the tool holder connecting seat of the machining spindle, the cylinder head seals the open end of the cylinder, the piston is fixedly connected with the tool holder, the piston divides the space in the cylinder into a first air cavity and a second air cavity, the tool holder has a third air cavity, the first valve communicates with the first air cavity, the second valve communicates with the second air cavity, and the second air cavity communicates with the third air cavity through an air hole.

[0012] As a preferred scheme, the tool magazine module comprises a left tool magazine support, a right tool magazine support, a tool magazine mounting plate, a tool magazine body and a plurality of machining tools, one side of the left tool magazine support and the right tool magazine support is fixed to the column, the other side is fixedly installed with the tool magazine mounting plate, the tool magazine body is connected to the tool magazine mounting plate through a turnover mechanism, the tool magazine body has a plurality of tool seats, and each tool seat is installed with a machining tool.

[0013] As a preferred scheme, the control box is installed with a controller, the controller is electrically connected with the X-axis motor, the Y-axis motor, the Z-axis motor, the spindle motor and the tool motor in the tool magazine body through wires.

[0014] A vibration reduction method of a machining center, gas pressure is introduced into a vibration reduction device, and vibration of a machining tool is buffered through adjustment of the pressure of the gas pressure.

[0015] Compared with the prior art, the machining center has obvious advantages and beneficial effects, specifically, as known from the technical scheme, the vibration reduction device is installed on the machining spindle module, gas pressure is introduced into the vibration reduction device, and vibration of the machining tool is buffered through adjustment of the pressure of the gas pressure, preferably, when the first air cavity of each absorber is 2 times the air pressure of the second air cavity at the initial air pressure, a better vibration absorption rate can be achieved.

[0016] To make the structure characteristics and effects of the present application clearer, the present application will be described in detail below with reference to the drawings and specific examples. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the machining center of the embodiment of the present application.

[0018] Figure 2 is a schematic view of the machining center of the embodiment of the present application along the machining spindle.

[0019] Figure 3 is Figure 2 is an enlarged view of A in FIG.

[0020] Figure 4 is a schematic view of the second, third and fourth absorbers of the embodiment of the present application.

[0021] Figure 5 is a cross-sectional view of the first absorber of the embodiment of the present application, with the piston being pushed up.

[0022] Figure 6 is a cross-sectional view of the first absorber of the embodiment of the present application, with the piston being pulled down.

[0023] Figure 7 is a schematic diagram of a working model of four absorbers of the embodiment of the present application.

[0024] Explanation of the drawing:

[0025] 10, rack 11, column

[0026] 20, X-axis module 21, X-axis motor

[0027] 22, X-axis screw 23, X-axis nut seat

[0028] 24, X-axis linear rail 25, X-axis sliding block

[0029] 26, machining workbench 30, Y-axis module

[0030] 31, Y-axis base 32, Y-axis motor

[0031] 33, Y-axis screw 34, Y-axis linear rail

[0032] 35, Y-axis sliding block 36, sliding saddle

[0033] 40, Z-axis module 41, Z-axis motor

[0034] 42, Z-axis screw 43, Z-axis linear rail

[0035] 44, Z-axis sliding block 50, machining spindle module

[0036] 51, spindle support 52, spindle motor

[0037] 53, machining spindle 54, tool shank

[0038] 55, first absorber 551, cylinder body

[0039] 552, cylinder body head 553, piston

[0040] 554, first air valve 555, second air valve

[0041] 556, first air cavity 557, second air cavity

[0042] 558, third air cavity 559, air hole

[0043] 56, second absorber 57, third absorber

[0044] 58. fourth absorber 60, tool magazine module

[0045] 61. left tool magazine support 62, right tool magazine support

[0046] 63. tool magazine mounting plate 64, tool magazine body

[0047] 65. machining tool 70, control box DETAILED DESCRIPTION

[0048] Referring to Figures 1 to 7 The preferred embodiment of the present application is shown in the drawings, which shows a machining center capable of reducing workpiece vibration, comprising a frame 10, an X-axis module 20, a Y-axis module 30, a Z-axis module 40, a machining spindle module 50, a tool magazine module 60, and a control box 70. The Y-axis module 30 is installed at the lower position of the frame 10, the X-axis module 20 is arranged on the Y-axis module 30 and is driven by the X-axis module 20. The frame 10 is fixedly provided with a column 11, one side of the column 11 is installed with the control box 70, and the other side is installed with the tool magazine module 60. There is a space between the tool magazine module 60 and the column 11, in which the Z-axis module 40 and the machining spindle module 50 are installed. The Z-axis module 40 drives the machining spindle module 50 to move back and forth along the X-axis, and the machining spindle module 50 is located above the X-axis module 20 and is installed with a damping device.

[0049] In operation, the Y-axis module 30 drives the X-axis module 20 to move back and forth along the Y-axis, and the X-axis module 20 is provided with a machining workbench 26 which is driven to move back and forth along the X-axis. When the workpiece to be machined is placed on the machining workbench, the movement of the workpiece to be machined along the X-axis and the Y-axis can be realized.

[0050] The Z-axis module 40 drives the machining spindle module 50 to move back and forth along the Z-axis, and the machining spindle module 50 can rotate, so that the machining tool 65 loaded on the machining spindle module 50 can move back and forth along the Z-axis and rotate at the same time, to realize various actions such as cutting, drilling, and polishing on the workpiece to be machined on the machining workbench 26.

[0051] The design of the tool magazine module 60 also meets the automatic tool changing function of the machining spindle module 50. When the Z-axis module 40 lifts the machining spindle module 50 upward, the machining spindle module 50 can assemble the machining tool 65 of the tool magazine module 60 by rotating the tool magazine module 60, to realize automatic tool changing.

[0052] More specifically, the Y-axis module 30 includes a Y-axis base 31, a Y-axis motor 32, a Y-axis screw 33, two Y-axis linear rails 34, a plurality of Y-axis sliding blocks 35, and a sliding saddle 36. The Y-axis base 31 has two pieces, which are fixed to the bottom panel of the frame 10. The Y-axis motor 32 is fixed in a Y-axis motor 32 mounting space between the two Y-axis bases 31. The output of the Y-axis motor 32 is connected to the Y-axis screw 33. The two Y-axis linear rails 34 are fixed to the bottom panel of the frame 10. The Y-axis screw 33 is located between the two Y-axis linear rails 34. The Y-axis linear rails 34 are respectively matched with the Y-axis sliding blocks 35. The Y-axis linear rails 34 can slide on the Y-axis linear rails 34. The Y-axis sliding blocks 35 are respectively matched with the sliding saddle 36. The sliding saddle 36 is driven by the Y-axis screw 33 through a Y-axis nut seat. In operation, the Y-axis base 31 serves as a fixed seat to fix the Y-axis motor 32. The Y-axis motor 32 drives the Y-axis screw 33 to rotate. Since the Y-axis screw 33 is connected to the sliding saddle 36 through the Y-axis nut seat, the sliding saddle 36 can move in the Y direction. Since the sliding saddle 36 is matched with the two Y-axis linear rails 34 through the Y-axis sliding blocks 35, the stability of the movement in the Y direction can be ensured.

[0053] The X-axis module 20 includes an X-axis motor 21, an X-axis screw 22, an X-axis nut seat 23, two X-axis linear rails 24, a plurality of X-axis sliding blocks 25, and a processing workbench 26. The X-axis motor 21 is fixed to the sliding saddle 36. The output of the X-axis motor 21 is connected to the X-axis screw 22. The two X-axis linear rails 24 are fixed to the sliding saddle 36 at intervals. The X-axis screw 22 is located between the two X-axis linear rails 24. The X-axis linear rails 24 are respectively matched with the X-axis sliding blocks 25. The X-axis sliding blocks 25 are respectively matched with the processing workbench 26. The processing workbench 26 is driven by the X-axis screw 22 through the X-axis nut seat 23. In operation, the X-axis motor 21 drives the X-axis screw 22 to rotate. Since the X-axis screw 22 is connected to the processing workbench 26 through the X-axis nut seat 23, the processing workbench 26 can move in the X direction. Since the processing workbench 26 is matched with the two X-axis linear rails 24 through the X-axis sliding blocks 25, the stability of the movement of the processing workbench 26 in the X direction can be ensured.

[0054] The Z-axis module 40 includes a Z-axis motor 41, a Z-axis screw 42, two Z-axis linear rails 43, and a plurality of Z-axis sliding blocks 44. The Z-axis motor 41 is fixed to the top of the column 11. The output of the Z-axis motor 41 is connected to the Z-axis screw 42. The two Z-axis linear rails 43 are vertically installed on the column 11 at intervals. The plurality of Z-axis sliding blocks 44 are slidably matched with the Z-axis screw 42.

[0055] The machining spindle module 50 comprises a spindle support 51, a spindle motor 52, a machining spindle 53, and a tool holder 54. The spindle support 51 is mounted on the Z-axis sliding block 44 and is driven by the Z-axis nut connected to the Z-axis screw 42. The spindle motor 52 is fixed on the spindle support 51, and the output of the spindle motor 52 is connected to the machining spindle 53. The machining spindle 53 is provided with the tool holder 54 for mounting a tool.

[0056] During operation, the Z-axis motor 41 drives the Z-axis screw 42 to rotate. Since the Z-axis screw 42 is connected to the spindle support 51 through the Z-axis nut, the spindle support 51 can be moved back and forth along the Z-axis. Since the spindle support 51 is matched with the two Z-axis linear rails 43 through the Z-axis sliding block 44, the stability of the spindle support 51 moving along the Z-axis is ensured. When the spindle motor 52 is started, power is output to the machining spindle 53. The machining spindle 53 transmits power to the tool holder 54, and the machining tool 65 is driven to rotate to perform various actions such as cutting, drilling, and polishing on the workpiece on the machining workbench 26.

[0057] As shown in Figures 3 to 5 The tool holder 54 is provided with a first absorber 55 at one end for connecting the machining spindle 53. The other end of the tool holder 54 is provided with a second absorber 56, a third absorber 57, and a fourth absorber 58 through an absorber support. The first absorber 55 acts on the tool holder 54, and the second absorber 56, the third absorber 57, and the fourth absorber 58 act on the machining tool 65. The first, second, third, and fourth absorbers 58 form a damping device. By adjusting the pressure of the gas pressure input into the damping device, the vibration of the machining tool 65 can be buffered.

[0058] As shown in Figures 6 to 7 Each absorber comprises a cylinder body 551, a cylinder head 552, a piston 553, a first air valve 554, and a second air valve 555. One end of the cylinder body 551 is fixed to the tool holder 54 connecting seat of the machining spindle 53. The cylinder head 552 seals the open end of the cylinder body 551. The piston 553 is fixedly connected to the tool holder 54. The piston 553 divides the space in the cylinder body 551 into a first air cavity 556 and a second air cavity 557. The tool holder 54 has a third air cavity 558. The first air valve 554 is connected to the first air cavity 556, and the second air valve 555 is connected to the second air cavity 557. The two air cavities and the third air cavity 558 are communicated through an air hole 559.

[0059] The tool magazine module 60 comprises a left tool magazine support 61, a right tool magazine support 62, a tool magazine mounting plate 63, a tool magazine body 64 and a plurality of machining tools 65; one side of the left tool magazine support 61 and the right tool magazine support 62 is fixed to the column 11, and the other side is fixedly installed with the tool magazine mounting plate 63, the tool magazine body 64 is connected to the tool magazine mounting plate 63 through a turnover mechanism, and a plurality of tool seats are arranged on the tool magazine body 64, and one machining tool 65 is installed on each tool seat, so that the tool changing function of the machining tool 65 can be realized.

[0060] The controller is installed in the control box 70, and the controller is electrically connected with the X-axis motor 21, the Y-axis motor 32, the Z-axis motor 41, the main shaft motor 52 and the tool motor in the tool magazine body 64 through wires, so as to realize the forward and reverse rotation of each motor, and control the start and stop and the rotating speed of each motor.

[0061] Based on the above machining center, the application also provides a damping method, and the specific method is as follows: a damping model is suggested, which is composed of a first absorber 55, a second absorber 56, a third absorber 57 and a fourth absorber 58.

[0062] The air pressures of the first air cavity 556 and the second air cavity 557 in the first absorber 55 are respectively denoted by c1 and k1;

[0063] The air pressures of the first air cavity 556 and the second air cavity 557 in the second absorber 56 are respectively denoted by c2 and k2;

[0064] The air pressures of the first air cavity 556 and the second air cavity 557 in the third absorber 57 are respectively denoted by c3 and k3;

[0065] The air pressures of the first air cavity 556 and the second air cavity 557 in the fourth absorber 58 are respectively denoted by c4 and k4;

[0066] The vibration frequencies of the first absorber 55, the second absorber 56, the third absorber 57 and the fourth absorber 58 are respectively denoted by F1, F2, F3 and F4;

[0067] The displacements of the first absorber 55, the second absorber 56, the third absorber 57 and the fourth absorber 58 are respectively denoted by x1, x2, x3 and x4;

[0068] When the machining tool 65 of the machining center acts on the machined workpiece, the machining tool 65 vibrates due to friction with the machined workpiece, and the vibration affects the machining precision. The application needs to control the pressure of each air cavity in each absorber to maximize the absorption of vibration and eliminate vibration to improve the machining precision.

[0069] The resonance of the machining tool 65 under different air pressures of each air cavity is summarized in Table 1

[0070]

[0071] From the above table, it can be seen that different air pressures are supplied to the damping device, and the vibration of the machining tool 65 can be buffered to different degrees by adjusting the pressure of the air pressure. When the first air chamber 556 of each absorber is 2 times the air pressure of the second air chamber 557 at the initial air pressure, a better vibration absorption rate can be achieved, as shown in case 2 of table 1.

[0072] The damping method of the present application is to pump gas into the first air valve 554 of the first absorber 55, and also pump gas into the second air valve 555. Since the first air chamber 556 and the second air chamber 557 are isolated from each other, and the third air chamber 558 and the second air chamber 557 are in communication with each other, after the air pressure is stable, the air pressure of the first air chamber 556 and the second air chamber 557 is tested to be the same, that is, c1=k1, then the first air valve 554 and the second air valve 555 are sealed. In the same way, c2=k2 for the second absorber 56, c3=k3 for the third absorber 57, and c4=k4 for the fourth absorber 58.

[0073] The first absorber 55 is installed inside the tool holder 54, and the second absorber 56, the third absorber 57, and the fourth absorber 58 are equally spaced around the machining tool 65 outside the tool holder 54, and the floating rotating steel ball at the bottom of the second absorber 56, the third absorber 57, and the fourth absorber 58 contacts the outer periphery of the machining tool 65. In addition, the second absorber 56, the third absorber 57, and the fourth absorber 58 are connected to the absorber support through the respective flip mechanisms with clamping force.

[0074] The working principle of the absorber is explained by taking the first absorber 55 as an example:

[0075] First, when the tool holder 54 of the machining tool 65 is subjected to pressure or vibrates upward, the piston 553 rises to press the gas in the first air chamber 556, so that the air pressure in the first air chamber 556 is greater than that in the second air chamber 557, and the gas in the first air chamber 556 can play a buffering and damping function when it is pressed.

[0076] Second, when the machining spindle 53 goes down and exerts force to make the machining tool 65 go down, the piston 553 rises to press the gas in the first air chamber 556, which also plays a buffering and damping function.

[0077] Third: when the machining spindle 53 goes up, the cylinder body 551 goes up synchronously, so that the gas in the second gas cavity 557 is extruded, however, since the second gas cavity 557 is communicated with the third gas cavity 558, and the diameter of the communicated gas hole 559 is very small, so the gas in the second gas cavity 557 is also slowly guided to the third gas cavity 558 from the gas hole 559, and the air in the third gas cavity 558 is extruded, so that the second gas cavity 557 and the third gas cavity 558 share the double buffer and damping functions.

[0078] In summary, the design focus of the present application is that the damping device is installed on the machining spindle module 50, the gas pressure is input into the damping device, the vibration of the machining tool 65 is buffered by adjusting the pressure of the gas pressure, preferably, when the first gas cavity 556 of each absorber is 2 times of the second gas cavity 557 at the initial gas pressure, a better vibration absorption rate can be achieved.

[0079] The above is only a preferred embodiment of the present application, and does not limit the technical scope of the present application, so any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical solution of the present application.

Claims

1. A machining center capable of reducing workpiece vibration, comprising a frame, an X-axis module, a Y-axis module, a Z-axis module, a machining spindle module, a tool magazine module, and a control box; characterized in that: The Y-axis module is installed at a lower position on the frame, and the X-axis module is mounted on the Y-axis module and is driven by the X-axis module; a column is fixedly installed on the frame, the control box is installed on one side of the column, and the tool magazine module is installed on the other side; The tool magazine module and the column have a space for installing a Z-axis module and a machining spindle module. The Z-axis module drives the machining spindle module to move back and forth along the X-axis. The machining spindle module is located above the X-axis module. A vibration damping device is installed on the machining spindle module. The Z-axis module includes a Z-axis motor, a Z-axis lead screw, two Z-axis linear guides, and multiple Z-axis sliders; the Z-axis motor is fixed to the top of the column, and the output of the Z-axis motor is connected to the Z-axis lead screw; the two Z-axis linear guides are vertically installed at equal intervals on the column, and the multiple Z-axis sliders are slidably matched and installed on the Z-axis lead screw; The machining spindle module includes a spindle support, a spindle motor, a machining spindle, and a tool holder. The spindle support is mounted on the Z-axis slider and is driven by the Z-axis lead screw via a Z-axis nut. The spindle motor is fixed to the spindle support, and its output is connected to the machining spindle. The machining spindle has a tool holder for mounting cutting tools. A first absorber is mounted on one end of the tool holder that connects to the machining spindle, and a second, third, and fourth absorber are mounted on the other end of the tool holder via an absorber bracket. The first absorber acts on the tool holder, and the second, third, and fourth absorbers work together to support the machining tool. The first, second, third, and fourth absorbers form a vibration damping device. Each absorber includes a cylinder body, a cylinder body head, a piston, a first valve, and a second valve. One end of the cylinder body is fixed to the tool holder connecting seat of the machining spindle. The cylinder body head seals the opening end of the cylinder body. The piston is fixedly connected to the tool holder. The piston divides the space inside the cylinder body into a first air chamber and a second air chamber. The tool holder has a third air chamber. The first valve connects to the first air chamber, and the second valve connects to the second air chamber. The second air chamber and the third air chamber are connected through air holes.

2. The machining center for reducing workpiece vibration according to claim 1, characterized in that: The Y-axis module includes a Y-axis base, a Y-axis motor, a Y-axis lead screw, two Y-axis linear guides, multiple Y-axis sliders, and a sliding saddle. Two Y-axis bases are fixed to the bottom panel of the frame. The Y-axis motor is fixed in the mounting space between the two Y-axis bases. The output of the Y-axis motor is connected to the Y-axis lead screw. The two Y-axis linear guides are fixed to the bottom panel of the frame, and the Y-axis lead screw is located between the two Y-axis linear guides. Y-axis sliders are mounted on the two Y-axis linear guides, allowing them to slide. A sliding saddle is mounted on each Y-axis slider, and the sliding saddle is actuated by the Y-axis lead screw via a Y-axis nut seat.

3. A machining center for reducing workpiece vibration according to claim 2, characterized in that: The X-axis module includes an X-axis motor, an X-axis lead screw, an X-axis nut seat, two X-axis linear guides, multiple X-axis sliders, and a machining table. The X-axis motor is fixed to the sliding saddle, and the output of the X-axis motor is connected to the X-axis lead screw. The two X-axis linear guides are fixed to the sliding saddle at intervals, and the X-axis lead screw is located between the two X-axis linear guides. The X-axis sliders are matched and installed on the two X-axis linear guides, and the machining table is mounted on the X-axis sliders. The machining table is driven by the X-axis lead screw through the X-axis nut seat.

4. A machining center for reducing workpiece vibration according to claim 1, characterized in that: The tool magazine module includes a left tool magazine bracket, a right tool magazine bracket, a tool magazine mounting plate, a tool magazine body, and multiple machining tools. One side of the left and right tool magazine brackets is fixed to a column, and the tool magazine mounting plate is fixedly installed on the other side. The tool magazine body is connected to the tool magazine mounting plate through a flipping mechanism. The tool magazine body has multiple tool holders, and each tool holder is equipped with a machining tool.

5. A machining center for reducing workpiece vibration according to claim 1, characterized in that: The control box contains a controller, which is electrically connected to the X-axis motor, Y-axis motor, Z-axis motor, spindle motor, and tool motor in the tool magazine body via wires.

6. The vibration reduction method for a machining center according to any one of claims 1 to 5, characterized in that: Air pressure is supplied to the vibration damping device, and the vibration of the machining tool is buffered by adjusting the air pressure.

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