A multi-spindle machining device

Abstract

The utility model discloses a kind of multi-spindle machining devices, including rack, first driving mechanism, multiple machining spindles and multiple second driving mechanisms, and workbench is equipped on rack;First driving mechanism is used to drive workbench to move along Y axis direction;Multiple machining spindles are set above workbench, and are used to process workpiece on workbench;Multiple second driving mechanisms are set one by one with multiple machining spindles, and second driving mechanism is used to drive corresponding machining spindle to move along X axis, Y axis and Z axis direction.The utility model can independently drive machining spindle to move in X axis, Y axis and Z axis direction by second driving mechanism, realizes the independent cutter diameter compensation of machining spindle and axis linear compensation in X axis, Y axis, Z axis direction;While, workbench is driven to carry out large-stroke feed along Y axis direction by first driving mechanism, avoid the pitch deformation generated due to overhanging when second driving mechanism is set into large-stroke feed Y axis movement.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining technology, and in particular to a multi-spindle machining device. Background Technology

[0002] In the field of CNC machining, multi-spindle machine tools have emerged as the manufacturing industry's requirements for production efficiency and machining accuracy continue to increase. Multi-spindle machine tools enable the simultaneous processing of multiple identical workpieces by having multiple machining spindles work at the same time, significantly improving production efficiency and reducing production costs, and have been widely used in industrial production.

[0003] Multi-spindle machine tools are mainly classified into three types: single-channel drive, hybrid-channel drive, and multi-channel drive. In a single-channel multi-spindle machine tool, multiple machining spindles share a single drive mechanism and auxiliary components such as the machine bed and housing in the X, Y, and Z axes. While it can achieve simultaneous machining of multiple workpieces with general precision, it cannot achieve independent tool diameter compensation and axial linearity compensation for different machining spindles. In a hybrid-channel multi-spindle machine tool, multiple machining spindles share drive mechanisms in any one or two of the X, Y, and Z axes, as well as auxiliary components such as the machine bed and housing. It can achieve partial axial linearity compensation, but still cannot achieve independent tool diameter compensation. Its machining precision is higher than that of a single-channel multi-spindle machine tool. In a multi-channel multi-spindle machine tool, each machining spindle has an independent drive mechanism corresponding to its own X, Y, and Z axes. It can achieve independent tool diameter compensation and axial linearity compensation for any machining spindle, enabling high-precision machining of multiple identical workpieces.

[0004] However, in terms of compensation and drive control, single-channel and hybrid-channel multi-spindle machine tools suffer from a lack of compensation functionality, complex control of multi-channel multi-spindle machine tools, and frequent coupling and decoupling between channels. To avoid collisions, multi-channel machine tools are designed with large axis spacing, leading to problems such as large space occupation and reduced accuracy. Existing multi-channel machine tools are simply combined with single-spindle machine tools, resulting in issues such as table interference and complex drive control. Utility Model Content

[0005] To overcome at least one of the defects described in the prior art, this utility model provides a multi-spindle machining device that can independently drive the machining spindle to move in the X, Y, and Z axes via a second drive mechanism, achieving independent tool diameter compensation and axial linear compensation in the X, Y, and Z axes. At the same time, the first drive mechanism drives the worktable to perform large-stroke feed along the Y axis, avoiding the pitch deformation caused by overhang when the second drive mechanism is set to large-stroke feed Y-axis movement, which would otherwise lead to a decrease in machining accuracy.

[0006] The technical solution adopted by this utility model to solve its problem is:

[0007] A multi-spindle machining apparatus, comprising,

[0008] A frame, on which a worktable is provided;

[0009] A first driving mechanism is used to drive the worktable to move along the Y-axis direction;

[0010] Multiple machining spindles are arranged above the worktable and are used to process workpieces on the worktable;

[0011] Multiple second drive mechanisms are provided, each corresponding to one of the multiple machining spindles. The second drive mechanism is used to drive the corresponding machining spindle to move along the X-axis, Y-axis and Z-axis directions.

[0012] Furthermore, the second drive mechanism includes a first drive component, a second drive component, and a third drive component. The first drive component is used to drive the machining spindle to move along the X-axis direction, the second drive component is used to drive the machining spindle to move along the Y-axis direction, and the third drive component is used to drive the machining spindle to move along the Z-axis direction.

[0013] Furthermore, the first driving mechanism includes a first motor drive assembly, a first lead screw, and a first nut seat. The first motor drive assembly is connected to the first lead screw, the first nut seat is connected to the first lead screw, and the worktable is connected to the first nut seat. The first motor drive assembly is used to drive the first lead screw to rotate, so that the first nut seat drives the worktable to move along the Y-axis.

[0014] Furthermore, the workbench includes a connecting frame and a support plate, the support plate being detachably connected to the connecting frame; the bottom of the connecting frame is provided with a connecting block, the connecting block being connected to the first nut seat.

[0015] Furthermore, the first drive mechanism is mounted on the frame, and the frame is also provided with two sets of parallel first guide rails, which are respectively located on both sides of the first drive mechanism; the bottom sides of the worktable are respectively provided with first sliders, which are slidably connected to the first guide rails.

[0016] Furthermore, the frame includes a base and a support, and the worktable is mounted on the base; the support includes two support beams and a crossbeam, the two support beams are respectively disposed on both sides of the worktable, and the bottom of the support beams are connected to the base; the two ends of the crossbeam are respectively connected to the top of the two support beams, and the crossbeam is located above the worktable; the plurality of second drive mechanisms are all mounted on the crossbeam.

[0017] Furthermore, the first drive assembly includes a second motor drive assembly, a second lead screw, a second nut seat, and a first mounting bracket. The second motor drive assembly is connected to the second lead screw, the second nut seat is connected to the second lead screw, the first mounting bracket is connected to the second nut seat, and the second drive assembly is mounted on the first mounting bracket. The second motor drive assembly is used to drive the second lead screw to rotate, so that the second nut seat drives the first mounting bracket and the second drive assembly to move along the X-axis direction.

[0018] Furthermore, the second drive assembly includes a third motor drive assembly, a third lead screw, a third nut seat, and a second mounting bracket. The third motor drive assembly is connected to the third lead screw, the third nut seat is connected to the third lead screw, the second mounting bracket is connected to the third nut seat, and the third drive assembly is mounted on the second mounting bracket. The third motor drive assembly is used to drive the third lead screw to rotate, so that the third nut seat drives the second mounting bracket and the third drive assembly to move along the Y-axis.

[0019] Furthermore, the third drive assembly includes a fourth motor drive assembly, a fourth lead screw, a fourth nut seat, and a third mounting bracket. The fourth motor drive assembly is connected to the fourth lead screw, the fourth nut seat is connected to the fourth lead screw, the third mounting bracket is connected to the fourth nut seat, and the machining spindle is mounted on the third mounting bracket. The fourth motor drive assembly is used to drive the fourth lead screw to rotate, so that the fourth nut seat drives the third mounting bracket and the machining spindle to move along the Z-axis.

[0020] Furthermore, the crossbeam is provided with two sets of parallel second guide rails along the X-axis direction, and the two sets of second guide rails are respectively located on both sides of the first drive assembly; the bottom sides of the first mounting bracket are respectively provided with second sliders, and the second sliders are slidably connected to the second guide rails;

[0021] The first mounting bracket has two sets of parallel third guide rails along the Y-axis, and the two sets of third guide rails are respectively located on both sides of the second drive assembly; the bottom sides of the second mounting bracket are respectively provided with third sliders, and the third sliders are slidably connected to the third guide rails;

[0022] The second mounting bracket has two sets of parallel fourth guide rails along the Z-axis direction, and the two sets of fourth guide rails are respectively located on both sides of the third drive assembly; the third mounting bracket has fourth sliders on both sides of its side, and the fourth sliders are slidably connected to the fourth guide rails.

[0023] In summary, the multi-spindle machining device provided by this utility model has the following technical effects:

[0024] 1) The multi-spindle machining device of this utility model can independently drive the machining spindle to move in the X-axis, Y-axis and Z-axis directions through the second drive mechanism, realizing independent tool diameter compensation of the machining spindle and axial linear compensation in the X-axis, Y-axis and Z-axis directions, thereby improving the machining accuracy of the machining spindle.

[0025] 2) The multi-spindle machining device of this utility model achieves efficient and precise machining through the cooperation of the first drive mechanism and the second drive mechanism. The first drive mechanism drives the worktable to perform a large-stroke feed along the Y-axis, which can quickly transport the workpiece to the appropriate machining position, improve the overall machining efficiency, and reduce idle travel time. The second drive mechanism drives the machining spindle to move along the Y-axis to achieve a smaller stroke. Furthermore, the second drive mechanism can compensate for the error of the large stroke movement of the first drive mechanism through the small stroke movement, so that the machining spindle can achieve precise positioning and movement.

[0026] 3) The multi-spindle machining device of this utility model drives the worktable to perform large-stroke feed along the Y-axis by the first drive mechanism, which avoids the pitch deformation caused by the overhang when the second drive mechanism is set to move along the Y-axis with large stroke feed, thus avoiding the problem of reduced machining accuracy. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the multi-spindle machining device according to an embodiment of the present invention;

[0028] Figure 2 This is a structural diagram of the base and workbench during assembly according to an embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the base with the worktable hidden in this embodiment of the present invention;

[0030] Figure 4 This is a structural diagram of the bracket and multiple second drive mechanisms assembled in an embodiment of the present utility model, with a set of second mounting brackets hidden.

[0031] Figure 5 This is a structural diagram of the bracket in an embodiment of the present invention when it is assembled with the first drive assembly and the second drive assembly, and a set of first mounting brackets is hidden.

[0032] Figure 6 This is a structural diagram showing the assembly of the second mounting bracket and the third drive assembly in an embodiment of the present invention, with the third mounting bracket concealed.

[0033] The meanings of the reference numerals in the attached figures are as follows:

[0034] 1. Frame; 11. Base; 12. Bracket; 121. Support beam; 122. Crossbeam; 123. Mounting slot; 2. Worktable; 21. Connecting frame; 22. Support plate; 3. First drive mechanism; 31. First motor drive assembly; 32. First lead screw; 33. First nut seat; 34. First guide rail; 35. First slider; 4. Machining spindle; 5. First drive assembly; 51. Second motor drive assembly; 52. Second lead screw; 53. Second nut seat; 54. First mounting frame; 55. Second guide rail; 56. Second slider; 6. Second drive assembly; 61. Third motor drive assembly; 62. Third lead screw; 63. Third nut seat; 64. Second mounting frame; 65. Third guide rail; 66. Third slider; 7. Third drive assembly; 71. Fourth motor drive assembly; 72. Fourth lead screw; 73. Fourth nut seat; 74. Third mounting frame; 75. Fourth guide rail; 76. Fourth slider. Detailed Implementation

[0035] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0036] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0038] See Figure 1 This utility model discloses a multi-spindle machining device, which includes a frame 1, a first drive mechanism 3, multiple machining spindles 4, and multiple second drive mechanisms. (See reference...) Figure 2 A worktable 2 is mounted on the frame 1, and a first drive mechanism 3 drives the worktable 2 to move along the Y-axis. Multiple machining spindles 4 are positioned above the worktable 2 and are used to process the workpieces on the worktable 2. (See reference...) Figure 1 and Figure 4Multiple second drive mechanisms are configured one-to-one with multiple machining spindles 4, and the second drive mechanisms are used to drive the corresponding machining spindles 4 to move along the X-axis, Y-axis and Z-axis directions.

[0039] Based on this structure, when using the multi-spindle machining device of this utility model, firstly, the corresponding cutting tools or drill bits are installed on the machining spindle 4 according to the machining requirements of the workpiece. Then, multiple workpieces to be processed are placed on the worktable 2 of the frame 1, and the workpieces are firmly clamped using suitable fixtures, such as vises and clamping plates, to prevent displacement of the workpieces during processing. Next, the first drive mechanism 3 is activated to drive the worktable 2 to move along the Y-axis. During this process, the workpieces on the worktable 2 move together with the worktable 2 and approach the machining area below the machining spindle 4, with multiple workpieces corresponding one-to-one with multiple machining spindles 4. During machining, the second drive mechanism drives the corresponding machining spindle 4 to move along the X-axis, Y-axis, and Z-axis directions to perform fine milling on the workpiece surface, achieving high-precision machining.

[0040] The second drive mechanism independently drives the machining spindle 4 in the X, Y, and Z axes, achieving independent tool diameter compensation and linear compensation along the X, Y, and Z axes. This machining device can achieve high-precision machining of multiple identical workpieces, achieving the same precision as a single spindle while offering superior economic efficiency.

[0041] Furthermore, during the entire processing, the first drive mechanism 3 and the second drive mechanism cooperate with each other. The first drive mechanism 3 drives the worktable 2 to perform a large-stroke feed along the Y-axis, which can quickly transport the workpiece to the appropriate processing position, improving the overall processing efficiency and reducing idle travel time. The second drive mechanism drives the machining spindle 4 to achieve a smaller stroke movement along the Y-axis. Through the small stroke movement, the second drive mechanism can compensate for the error of the large stroke movement of the first drive mechanism 3, enabling the machining spindle 4 to achieve precise positioning and movement, meeting the requirements for fine machining of the workpiece. It can perform high-precision cutting, drilling, and other machining operations on the workpiece, ensuring processing quality.

[0042] It should be noted that the large stroke movement of the workpiece is driven by the first drive mechanism 3, which also avoids the second drive mechanism from undertaking the large stroke feed task. This prevents the pitch deformation caused by the overhang when the second drive mechanism is set to move in the Y-axis with a large stroke feed, thus ensuring the machining accuracy.

[0043] In addition, the X-axis and Y-axis are two mutually perpendicular directions in the horizontal direction, and the Z-axis is a vertical direction, which is perpendicular to both the X-axis and Y-axis.

[0044] Further, see Figure 1 andFigure 4 The second drive mechanism specifically includes a first drive component 5, a second drive component 6, and a third drive component 7. The first drive component 5 is used to drive the machining spindle 4 to move along the X-axis, the second drive component 6 is used to drive the machining spindle 4 to move along the Y-axis, and the third drive component 7 is used to drive the machining spindle 4 to move along the Z-axis.

[0045] Based on this structure, when machining the workpiece using the machining spindle 4, the first drive assembly 5, the second drive assembly 6, and the third drive assembly 7 can be activated to drive the machining spindle 4 to move precisely along the X-axis, Y-axis, and Z-axis.

[0046] Specifically, the first drive assembly 5, the second drive assembly 6, and the third drive assembly 7 can be one or more of the following transmission structures: a lead screw and nut pair, a gear and rack, etc. It should be noted that by driving the machining spindle 4 in the X, Y, and Z axes respectively through the three drive assemblies, a precise motion basis can be provided for tool diameter compensation. Specifically, the second drive mechanism can adjust the position of the machining spindle 4 in real time in each machining direction according to the difference between the actual tool diameter and the set diameter, ensuring accurate cutting and effectively avoiding machining errors caused by tool diameter deviation, thus improving machining accuracy.

[0047] Further, see Figure 3 The first drive mechanism 3 includes a first motor drive assembly 31, a first lead screw 32, and a first nut seat 33. Specifically, the first motor drive assembly 31 is connected to the first lead screw 32, the first nut seat 33 is connected to the first lead screw 32, and the worktable 2 is connected to the first nut seat 33. The first motor drive assembly 31 drives the first lead screw 32 to rotate, so that the first nut seat 33 drives the worktable 2 to move along the Y-axis.

[0048] Based on this structure, when the first drive mechanism 3 drives the worktable 2 to move, the first motor drive assembly 31 is first activated to start working, and its output rotational power is transmitted to the first lead screw 32, causing the first lead screw 32 to rotate. Since the first nut seat 33 and the first lead screw 32 are connected by a threaded connection, when the first lead screw 32 rotates, the first nut seat 33 will move along the axis of the first lead screw 32. The worktable 2 is connected to the first nut seat 33, so the worktable 2 will move along the Y-axis with the first nut seat 33, performing a large stroke.

[0049] Therefore, through the coordinated operation of the first motor drive assembly 31, the first lead screw 32, and the first nut seat 33, the first drive mechanism 3 can achieve a large-stroke, rapid movement of the worktable 2 along the Y-axis. This large-stroke, rapid feed allows the workpiece to quickly move from its initial position to the processing area, improving the overall processing efficiency and reducing time wastage caused by slow workpiece movement.

[0050] In addition, the first drive mechanism 3 can also be a linear motor drive structure, a gear and rack transmission structure, etc. When a linear motor drive structure is used, the linear motor is directly connected to the worktable 2, without the need for intermediate transmission components. When the linear motor is energized, the generated electromagnetic force directly drives the worktable 2 to perform linear motion, achieving a large stroke movement in the Y-axis direction. When a gear and rack transmission structure is used, the output shaft of the drive motor is connected to the gear, and the rack is fixed in the direction of movement of the worktable 2, with the gear meshing with the rack. The motor operation drives the gear to rotate, and through the meshing transmission of the gear and rack, the worktable 2 performs a large stroke movement in the Y-axis direction.

[0051] Furthermore, the workbench 2 includes a connecting frame 21 and a support plate 22, and the support plate 22 is detachably connected to the connecting frame 21. The bottom of the connecting frame 21 is provided with a connecting block, and the connecting block is connected to the first nut seat 33.

[0052] Based on this structure, during assembly, the support plate 22 can be installed on the connecting frame 21 and fixed using detachable connection methods such as bolts and clips to ensure a firm connection and prevent the support plate 22 from shifting during processing.

[0053] When the first drive mechanism 3 is started, the first motor drive assembly 31 drives the first lead screw 32 to rotate, causing the first nut seat 33 to move along the Y-axis. Since the connecting block at the bottom of the connecting frame 21 is connected to the first nut seat 33, the connecting frame 21 will move synchronously with the first nut seat 33, thereby driving the support plate 22 installed on the connecting frame 21 and the workpiece placed on the support plate 22 to move along the Y-axis in a large stroke, quickly approaching the machining spindle 4 and entering the machining area.

[0054] During the processing, if it is necessary to adjust the position of the workpiece, the first drive mechanism 3 can precisely control the moving distance of the first nut seat 33, thereby achieving precise adjustment of the workpiece position.

[0055] After processing is completed, if the support plate 22 is worn, damaged, or needs to be replaced to adapt to new processing tasks, the connecting bolts can be unscrewed or the clips can be loosened to remove the old support plate 22 and replace it with a new support plate 22.

[0056] Thus, the connecting frame 21 is connected to the first nut seat 33 via the connecting block at the bottom, achieving stable large-stroke movement under the drive of the first drive mechanism 3. The connecting frame 21 can firmly support the support plate 22 and the workpiece, ensuring that the workpiece will not shake or shift during high-speed movement and processing, thus guaranteeing processing accuracy.

[0057] Further, see Figure 2 and Figure 3 The first drive mechanism 3 is mounted on the frame 1, and the frame 1 is also provided with two sets of parallel first guide rails 34, which are respectively located on both sides of the first drive mechanism 3. The bottom sides of the worktable 2 are respectively provided with first sliders 35, which are slidably connected to the first guide rails 34.

[0058] Based on this structure, during use, when the first drive mechanism 3 is activated, the first motor drive assembly 31 starts working, driving the first lead screw 32 to rotate. The first nut seat 33 moves along the lead screw axis as the first lead screw 32 rotates. Because the first sliders 35 on both sides of the bottom of the worktable 2 are slidably connected to the first guide rail 34, the worktable 2, driven by the first nut seat 33, can move smoothly and precisely along the direction determined by the first guide rail 34 in the Y-axis direction with a large stroke.

[0059] Therefore, the first guide rail 34 can provide precise guidance for the movement of the worktable 2. When the first drive mechanism 3 drives the worktable 2 to move along the Y-axis, the guide rail can restrict the degree of freedom of the worktable 2, so that it can only move in a straight line along the direction of the guide rail, avoiding instability such as offset and shaking of the worktable 2 during the movement, and ensuring the positional accuracy of the workpiece during transportation and processing.

[0060] Furthermore, the frame 1 includes a base 11 and a support 12, and the aforementioned worktable 2 is mounted on the base 11. (See also...) Figure 4 The bracket 12 also includes two support beams 121 and a crossbeam 122. The two support beams 121 are respectively located on both sides of the worktable 2, and the bottom of the support beams 121 is connected to the base 11. The two ends of the crossbeam 122 are respectively connected to the top of the two support beams 121, and the crossbeam 122 is located above the worktable 2. In addition, multiple second drive mechanisms are mounted on the crossbeam 122.

[0061] Based on this structure, during assembly, the two support beams 121 are first installed on the base 11 and fixed by means of screw connection, welding, or other connection methods. Then, the two ends of the crossbeam 122 are connected to the tops of the two support beams 121, which can also be fixed firmly by means of screw connection, welding, or other connection methods, forming a stable frame structure. Then, multiple second drive mechanisms are installed on the crossbeam 122, and the machining spindle 4 is installed on the power output end of the second drive mechanism.

[0062] Therefore, the base 11 serves as the foundation of the entire frame 1, providing stable support for components such as the worktable 2, the first drive mechanism 3, and the support beam 121. It bears various weights and loads during equipment operation, ensuring the stability of the equipment during processing and preventing a decrease in processing accuracy due to instability of the base 11. The bracket 12 provides a stable mounting platform for multiple second drive mechanisms, ensuring the stability of the second drive mechanisms during operation, thereby ensuring the motion accuracy of the machining spindle 4 and helping to improve processing quality.

[0063] Further, see Figure 4 and Figure 5 The first drive assembly 5 includes a second motor drive assembly 51, a second lead screw 52, ​​a second nut seat 53, and a first mounting bracket 54. Specifically, the second motor drive assembly 51 is connected to the second lead screw 52, ​​the second nut seat 53 is connected to the second lead screw 52, ​​the first mounting bracket 54 is connected to the second nut seat 53, and the second drive assembly 6 is mounted on the first mounting bracket 54. The second motor drive assembly 51 drives the second lead screw 52 to rotate, so that the second nut seat 53 drives the first mounting bracket 54 and the second drive assembly 6 to move along the X-axis.

[0064] Based on this structure, see Figure 5 The top surface of the crossbeam 122 is provided with a mounting groove 123 extending along the X-axis. During assembly, the first drive components 5 of multiple second drive mechanisms can be installed in the mounting groove 123. Specifically, the second motor drive components 51 of each first drive component 5 can be respectively disposed at both ends of the mounting groove 123, and the first lead screw 32 extends towards the X-axis. For example, when there are two sets of machining spindle 4 and its second drive mechanism, the second motor drive components 51 of the two first drive components 5 can be respectively disposed at both ends of the mounting groove 123. When there are three or four sets of machining spindle 4 and its second drive mechanism, the second motor drive components 51 of two of the first drive components 5 can be disposed at one end of the mounting groove 123, and the second motor drive components 51 of the remaining one or two first drive components 5 can be disposed at the other end of the mounting groove 123.

[0065] When the X-axis position of the machining spindle 4 needs to be adjusted, the second motor drive assembly 51 starts working, outputting rotational power to drive the second lead screw 52 to rotate. Since the second nut seat 53 and the second lead screw 52 are threaded together, the rotation of the second lead screw 52 causes the second nut seat 53 to move along the lead screw axis. Because the first mounting bracket 54 is connected to the second nut seat 53, and the second drive assembly 6 is mounted on the first mounting bracket 54, the movement of the second nut seat 53 drives the first mounting bracket 54 and the second drive assembly 6 to move synchronously along the X-axis, thereby transmitting the movement in the X-axis direction to the machining spindle 4 connected to the power output end of the second drive mechanism.

[0066] Therefore, through the coordinated operation of the second motor drive assembly 51, the second lead screw 52, ​​the second nut seat 53, and the first mounting bracket 54, the first drive assembly 5 can achieve precise control of the second drive assembly 6 in the X-axis direction. The second motor drive assembly 51 can precisely control the rotation speed and number of revolutions of the second lead screw 52, ​​thereby driving the second drive assembly 6 to achieve precise linear displacement through the second nut seat 53.

[0067] The second drive assembly 6 is mounted on the first mounting bracket 54, and the first mounting bracket 54 is a horizontal mounting bracket, which provides a stable mounting position for the second drive assembly 6.

[0068] Furthermore, each of the multiple machining spindles 4 is driven by an independent first drive assembly 5, enabling independent compensation in the X-axis direction of the multiple spindles and eliminating errors between the multiple spindles in the X-axis direction. Simultaneously, it avoids collision interference between the machining spindles 4, reducing the risk of collision from a mechanical structure perspective and improving the stability of the equipment.

[0069] Furthermore, the second drive assembly 6 includes a third motor drive assembly 61, a third lead screw 62, a third nut seat 63, and a second mounting bracket 64. Specifically, the third motor drive assembly 61 is connected to the third lead screw 62, the third nut seat 63 is connected to the third lead screw 62, the second mounting bracket 64 is connected to the third nut seat 63, and the third drive assembly 7 is mounted on the second mounting bracket 64. The third motor drive assembly 61 drives the third lead screw 62 to rotate, so that the third nut seat 63 drives the second mounting bracket 64 and the third drive assembly 7 to move along the Y-axis.

[0070] Based on this structure, during assembly, the second drive components 6 of multiple second drive mechanisms can be installed corresponding to each of the first mounting brackets 54. Specifically, the third motor drive component 61 of the second drive component 6 can be installed at one end of the first mounting bracket 54 along the Y-axis, and the second lead screw 52 extends towards the Y-axis. At the same time, the second lead screw 52 is located above the mounting groove 123, and its movement in the Y-axis direction will not be interfered with by the mounting groove 123.

[0071] Then the second mounting bracket 64 is installed on the third nut seat 63. For details, please refer to [link / reference]. Figure 4 and Figure 6 The second mounting bracket 64 includes a first mounting plate and a second mounting plate, and the first mounting plate and the second mounting plate are arranged at a right angle. The first mounting plate is a horizontal mounting plate, and its bottom is connected to the third nut seat 63; the second mounting plate is a vertical mounting plate, and the third drive assembly 7 is mounted on the mounting surface of the vertical mounting plate.

[0072] When the Y-axis position of the machining spindle 4 needs to be adjusted, the third motor drive assembly 61 starts working, outputting rotational power to drive the third lead screw 62 to rotate. Since the third nut seat 63 and the third lead screw 62 are threaded together, the rotation of the third lead screw 62 causes the third nut seat 63 to move along the lead screw axis. Because the second mounting bracket 64 is connected to the third nut seat 63, and the third drive assembly 7 is mounted on the second mounting bracket 64, the movement of the third nut seat 63 drives the second mounting bracket 64 and the third drive assembly 7 to move synchronously along the Y-axis, thereby transmitting the movement in the Y-axis direction to the machining spindle 4 connected to the power output end of the second drive mechanism.

[0073] Therefore, through the coordinated operation of the third motor drive assembly 61, the third lead screw 62, the third nut seat 63, and the second mounting bracket 64, the second drive assembly 6 can achieve precise control of the third drive assembly 7 in the Y-axis direction. The third motor drive assembly 61 can precisely control the rotation speed and number of revolutions of the third lead screw 62, thereby driving the third drive assembly 7 to achieve precise linear displacement through the third nut seat 63.

[0074] Furthermore, since the second drive assembly 6 is also mounted on the first mounting bracket 54, when the first drive assembly 5 drives the first mounting bracket 54 to move along the X-axis, the second drive assembly 6 mounted on it also moves accordingly. This results in better continuity of movement between the two drive assemblies in machining operations that require continuous movement in the X and Y axes.

[0075] Further, see Figure 6 The third drive assembly 7 includes a fourth motor drive assembly 71, a fourth lead screw 72, a fourth nut seat 73, and a third mounting bracket 74. Specifically, the fourth motor drive assembly 71 is connected to the fourth lead screw 72, the fourth nut seat 73 is connected to the fourth lead screw 72, the third mounting bracket 74 is connected to the fourth nut seat 73, and the machining spindle 4 is mounted on the third mounting bracket 74. The fourth motor drive assembly 71 drives the fourth lead screw 72 to rotate, so that the fourth nut seat 73 drives the third mounting bracket 74 and the machining spindle 4 to move along the Z-axis.

[0076] Based on this structure, during assembly, the third drive components 7 of multiple second drive mechanisms can be installed corresponding to each of the second mounting brackets 64. Specifically, the fourth motor drive component 71 of the third drive component 7 can be installed at one end of the second mounting plate of the second mounting bracket 64 along the Z-axis direction, and the fourth lead screw 72 can be installed extending downward along the Z-axis direction. Then, the third mounting bracket 74 is connected to the fourth nut seat 73, see reference. Figure 1 The third mounting bracket 74 is a vertical mounting plate, with one side connected to the fourth nut seat 73 and the other side having a mounting base, on which the machining spindle 4 is mounted.

[0077] When the Z-axis position of the machining spindle 4 needs to be adjusted, the fourth motor drive assembly 71 starts working, outputting rotational power to drive the fourth lead screw 72 to rotate. Since the fourth nut seat 73 and the fourth lead screw 72 are threaded together, the rotation of the fourth lead screw 72 causes the fourth nut seat 73 to move along the lead screw axis. Because the third mounting bracket 74 is connected to the fourth nut seat 73, and the machining spindle 4 is mounted on the third mounting bracket 74, the movement of the fourth nut seat 73 causes the third mounting bracket 74 and the machining spindle 4 to move synchronously along the Z-axis.

[0078] In milling, when it is necessary to adjust the cutting depth of the tool in the Z-axis direction, the fourth motor drive assembly 71 drives the fourth lead screw 72 to rotate, thereby achieving precise displacement of the machining spindle 4 in the Z-axis direction and ensuring that the tool can accurately cut the workpiece according to the machining requirements.

[0079] Therefore, through the coordinated operation of the fourth motor drive assembly 71, the fourth lead screw 72, the fourth nut seat 73, and the third mounting bracket 74, the third drive assembly 7 can achieve precise control of the machining spindle 4 in the Z-axis direction. The fourth motor drive assembly 71 can precisely control the rotation speed and number of revolutions of the fourth lead screw 72, thereby driving the machining spindle 4 to achieve precise linear displacement through the fourth nut seat 73.

[0080] It should be noted that when the machining spindle 4 needs to move independently in the Z-axis direction, the fourth motor drive assembly 71 drives the fourth lead screw 72 to rotate, causing the fourth nut seat 73 to drive the third mounting bracket 74 and the machining spindle 4 to move along the Z-axis direction. At this time, although the third drive assembly 7 is the main working component, the second mounting bracket 64 needs to stably support the third drive assembly 7 to ensure its smooth movement. The second drive assembly 6 is mounted on the first mounting bracket 54, which also indirectly provides a basic stability guarantee for the movement of the third drive assembly 7.

[0081] Furthermore, the crossbeam 122 is provided with two sets of parallel second guide rails 55 along the X-axis direction, and the two sets of second guide rails 55 are respectively located on both sides of the first drive assembly 5. Among them, the bottom sides of the first mounting bracket 54 are respectively provided with second sliders 56, and the second sliders 56 are slidably connected to the second guide rails 55.

[0082] Similarly, the first mounting bracket 54 has two sets of parallel third guide rails 65 along the Y-axis, with the two sets of third guide rails 65 located on both sides of the second drive assembly 6. The bottom sides of the second mounting bracket 64 are each provided with a third slider 66, which is slidably connected to the third guide rails 65.

[0083] In addition, the second mounting bracket 64 is provided with two sets of parallel fourth guide rails 75 along the Z-axis direction, and the two sets of fourth guide rails 75 are respectively located on both sides of the third drive assembly 7. Among them, the third mounting bracket 74 is provided with fourth sliders 76 on both sides of its side, and the fourth sliders 76 are slidably connected to the fourth guide rails 75.

[0084] Based on this structure, during assembly, firstly, two sets of parallel second guide rails 55 are securely mounted on the top surface of the crossbeam 122 along the X-axis direction, ensuring they are positioned on both sides of the first drive assembly 5. Next, second sliders 56 are installed on both sides of the bottom of the first mounting bracket 54, ensuring a tight connection between the second sliders 56 and the first mounting bracket 54, and that the sliding surfaces of the second sliders 56 and the second guide rails 55 have good fit. The two sets of third guide rails 65 along the Y-axis direction on the first mounting bracket 54, the third sliders 66 on both sides of the bottom of the second mounting bracket 64, the two sets of fourth guide rails 75 along the Z-axis direction on the second mounting bracket 64, and the fourth sliders 76 on both sides of the side of the third mounting bracket 74 are all installed in the same manner.

[0085] When moving along the X-axis, the second motor drive assembly 51 drives the second lead screw 52 to rotate, and the second sliders 56 on both sides of the bottom of the first mounting bracket 54 slide on the second guide rail 55, causing the first mounting bracket 54 and all components mounted on it to move along the X-axis. When moving along the Y-axis, the third motor drive assembly 61 drives the third lead screw 62 to rotate, and the third sliders 66 on both sides of the bottom of the second mounting bracket 64 slide on the third guide rail 65, causing the second mounting bracket 64, the third drive assembly 7, and the machining spindle 4 to move along the Y-axis. When moving along the Z-axis, the fourth motor drive assembly 71 drives the fourth lead screw 72 to rotate, and the fourth sliders 76 on both sides of the side of the third mounting bracket 74 slide on the fourth guide rail 75, realizing the movement of the machining spindle 4 along the Z-axis.

[0086] Therefore, each guide rail provides precise guidance for the movement of the corresponding mounting bracket and drive assembly, ensuring that the machining spindle 4 can move along a predetermined trajectory during the machining process. The slider, in cooperation with the guide rail, can bear the weight of each mounting bracket, the drive assembly mounted on it, and the machining spindle 4. During machining, it withstands various loads generated by inertial forces, cutting forces, etc., ensuring the stability of the movement, reducing vibration and displacement deviation, thereby improving machining accuracy.

[0087] Furthermore, in this utility model, the first motor drive assembly 31, the second motor drive assembly 51, the third motor drive assembly 61, and the fourth motor drive assembly 71 all include a servo motor, a motor mounting base, and a support unit. One end of the lead screw is mounted on the motor mounting base via the support unit, and the servo motor is connected to one end of the lead screw via a coupling. The other end of the lead screw is mounted on the mounting frame or the frame 1 via a bearing seat. The support unit can be a bearing, a rotating sleeve, etc.

[0088] In summary, in this application, each machining spindle 4 has an independent second drive mechanism to control its movement in the X, Y, and Z axes, achieving independent control of each machining spindle 4. Unlike existing multi-channel machine tools that simply merge multiple single-spindle machine tools and require complex multi-channel control, this utility model, through this independent and relatively simple drive mechanism setting, avoids frequent coupling and decoupling between channels, simplifies the control system, and reduces control difficulty and cost.

[0089] Since the second drive mechanism of each machining spindle 4 can independently control its movement in the X, Y, and Z axes, the machining stroke can be flexibly adjusted according to the actual needs of the workpiece. Unlike existing multi-spindle machine tools with relatively fixed machining strokes, this invention can achieve flexibility in the range of machining dimensions, adapting to the machining requirements of workpieces of different sizes and shapes.

[0090] It is worth noting that each machining spindle 4 can independently perform X, Y, and Z axis motion control, which facilitates tool diameter compensation and axis linearity compensation for any machining spindle 4, thereby improving machining accuracy. Multiple machining spindles 4 can simultaneously machine multiple identical or different workpieces, improving machining efficiency and ensuring high precision.

[0091] In addition, the worktable 2 moves in the Y-axis direction through the first drive mechanism 3, and multiple machining spindles 4 are positioned in three-dimensional space through their respective second drive mechanisms. This avoids setting a large spindle pitch to avoid spindle collisions, as is the case in the prior art, thereby reducing the overall size of the machine tool and reducing the space occupied by the machine tool.

[0092] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A multi-spindle machining apparatus, characterized in that: include, A frame, on which a worktable is provided; A first driving mechanism is used to drive the worktable to move along the Y-axis direction; Multiple machining spindles are arranged above the worktable and are used to process workpieces on the worktable; Multiple second drive mechanisms are provided, each corresponding to one of the multiple machining spindles. The second drive mechanism is used to drive the corresponding machining spindle to move along the X-axis, Y-axis and Z-axis directions.

2. The multi-spindle machining apparatus according to claim 1, characterized in that: The second drive mechanism includes a first drive component, a second drive component, and a third drive component. The first drive component is used to drive the machining spindle to move along the X-axis direction, the second drive component is used to drive the machining spindle to move along the Y-axis direction, and the third drive component is used to drive the machining spindle to move along the Z-axis direction.

3. The multi-spindle machining apparatus according to claim 1, characterized in that: The first driving mechanism includes a first motor driving assembly, a first lead screw, and a first nut seat. The first motor driving assembly is connected to the first lead screw, the first nut seat is connected to the first lead screw, and the worktable is connected to the first nut seat. The first motor driving assembly is used to drive the first lead screw to rotate, so that the first nut seat drives the worktable to move along the Y-axis.

4. The multi-spindle machining apparatus according to claim 3, characterized in that: The workbench includes a connecting frame and a support plate, the support plate being detachably connected to the connecting frame; the bottom of the connecting frame is provided with a connecting block, the connecting block being connected to the first nut seat.

5. The multi-spindle machining apparatus according to any one of claims 3-4, characterized in that: The first drive mechanism is mounted on the frame, and the frame is also provided with two sets of parallel first guide rails, which are respectively located on both sides of the first drive mechanism; the bottom sides of the worktable are respectively provided with first sliders, which are slidably connected to the first guide rails.

6. The multi-spindle machining apparatus according to claim 2, characterized in that: The frame includes a base and a support, and the workbench is mounted on the base; the support includes two support beams and a crossbeam, the two support beams are respectively located on both sides of the workbench, and the bottom of the support beams is connected to the base; the two ends of the crossbeam are respectively connected to the top of the two support beams, and the crossbeam is located above the workbench; the plurality of second drive mechanisms are all mounted on the crossbeam.

7. The multi-spindle machining apparatus according to claim 6, characterized in that: The first drive assembly includes a second motor drive assembly, a second lead screw, a second nut seat, and a first mounting bracket. The second motor drive assembly is connected to the second lead screw, the second nut seat is connected to the second lead screw, the first mounting bracket is connected to the second nut seat, and the second drive assembly is mounted on the first mounting bracket. The second motor drive assembly is used to drive the second lead screw to rotate, so that the second nut seat drives the first mounting bracket and the second drive assembly to move along the X-axis.

8. The multi-spindle machining apparatus according to claim 7, characterized in that: The second drive assembly includes a third motor drive assembly, a third lead screw, a third nut seat, and a second mounting bracket. The third motor drive assembly is connected to the third lead screw, the third nut seat is connected to the third lead screw, the second mounting bracket is connected to the third nut seat, and the third drive assembly is mounted on the second mounting bracket. The third motor drive assembly is used to drive the third lead screw to rotate, so that the third nut seat drives the second mounting bracket and the third drive assembly to move along the Y-axis.

9. The multi-spindle machining apparatus according to claim 8, characterized in that: The third drive assembly includes a fourth motor drive assembly, a fourth lead screw, a fourth nut seat, and a third mounting bracket. The fourth motor drive assembly is connected to the fourth lead screw, the fourth nut seat is connected to the fourth lead screw, and the third mounting bracket is connected to the fourth nut seat. The machining spindle is mounted on the third mounting bracket. The fourth motor drive assembly is used to drive the fourth lead screw to rotate, so that the fourth nut seat drives the third mounting bracket and the machining spindle to move along the Z-axis.

10. The multi-spindle machining apparatus according to claim 9, characterized in that: The crossbeam is provided with two sets of parallel second guide rails along the X-axis direction, and the two sets of second guide rails are respectively located on both sides of the first drive assembly; the bottom sides of the first mounting bracket are respectively provided with second sliders, and the second sliders are slidably connected to the second guide rails; The first mounting bracket has two sets of parallel third guide rails along the Y-axis, and the two sets of third guide rails are respectively located on both sides of the second drive assembly; the bottom sides of the second mounting bracket are respectively provided with third sliders, and the third sliders are slidably connected to the third guide rails; The second mounting bracket has two sets of parallel fourth guide rails along the Z-axis direction, and the two sets of fourth guide rails are respectively located on both sides of the third drive assembly; the third mounting bracket has fourth sliders on both sides of its side, and the fourth sliders are slidably connected to the fourth guide rails.

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