A high-speed double-spindle machine tool driven by a linear motor

Abstract

The application discloses a high-speed double-spindle machine tool driven by a linear motor, which comprises a machine bed, two X-direction guide rails arranged on the machine bed, a first chain tool magazine and a first rotary table installed on the left side of the machine bed, a second chain tool magazine and a second rotary table installed on the right side of the machine bed, a first spindle unit comprising a first cross beam, a first slide saddle, a first slide ram, a first five-axis swing head and a first electric spindle, a second spindle unit comprising a second cross beam, a second slide saddle, a second slide ram, a second five-axis swing head and a second electric spindle, a first channel and a second channel controlled by a double-channel numerical control system, the first electric spindle and the second electric spindle driven by the first channel and the second channel respectively, an X1 shaft and an X2 shaft being a portal shaft of the first channel and a portal shaft of the second channel respectively, the X1 shaft, a Y1 shaft and a Z1 shaft and the X2 shaft, a Y2 shaft and a Z2 shaft driven by linear motors and provided with grating rulers respectively. The machine tool has a small floor area and can improve the part machining efficiency by 3-4 times, and is especially suitable for machining automobile parts in large quantities.

Description

Technical Field

[0001] This invention belongs to the field of dual-spindle machine tools for processing new energy vehicle parts, and specifically relates to a high-speed dual-spindle machine tool driven by a linear motor. Background Technology

[0002] With the explosive growth of new energy vehicles, the demand for processing large structural components such as integrated die-cast front compartments, rear floors, and battery packs is increasing. Furthermore, the mass production model of the automotive industry requires higher efficiency in parts processing. Traditional single-spindle, lead screw-driven machine tools, due to their limited rapid traverse speed (typically only 60 m / min) and the need for transmission components like bearings and the lead screw itself, suffer from poor dynamic acceleration and deceleration performance, and can no longer meet the high-efficiency requirements of automotive industry customers. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-speed dual-spindle machine tool driven by a linear motor, which has a small footprint and can improve the part processing efficiency by 3-4 times. It is especially suitable for processing automotive parts manufactured in large quantities. Moreover, the machine tool is driven by a linear motor, which greatly increases the rigidity of the drive system and significantly improves the dynamic operation performance of acceleration and deceleration. It is particularly suitable for processing automotive parts with a large proportion of rapid positioning.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a high-speed dual-spindle machine tool driven by a linear motor, including a bed, a first spindle unit and a second spindle unit. Two X-axis guide rails are provided on the bed. A first chain-type tool magazine and a first rotary table are installed on the left side of the bed. A second chain-type tool magazine and a second rotary table are installed on the right side of the bed.

[0005] The first spindle unit includes a first crossbeam, a first saddle, a first ram, a first five-axis oscillating head, and a first electric spindle. The first crossbeam is movably mounted on the left side of the two X-axis guide rails, and the left-right movement direction of the first crossbeam is denoted as the X1 axis. The first saddle is movably mounted on the first crossbeam, and the front-back movement direction of the first saddle is denoted as the Y1 axis. The first ram is movably mounted on the first saddle, and the up-down movement direction of the first ram is denoted as the Z1 axis. The first five-axis oscillating head is mounted at the lower end of the first ram, and the first five-axis oscillating head provides a B1 axis that rotates around the Y1 axis and a C1 axis that rotates around the Z1 axis. The first electric spindle is mounted upright on the first five-axis oscillating head, and the first electric spindle is denoted as the SP1 axis.

[0006] The second spindle unit includes a second crossbeam, a second saddle, a second ram, a second five-axis oscillating head, and a second electric spindle. The second crossbeam is movably mounted on the right side of the two X-axis guide rails, and the left-right movement direction of the second crossbeam is denoted as the X2 axis. The second saddle is movably mounted on the second crossbeam, and the back-and-forth movement direction of the second saddle is denoted as the Y2 axis. The second ram is movably mounted on the second saddle, and the up-and-down movement direction of the second ram is denoted as the Z2 axis. The second five-axis oscillating head is mounted at the lower end of the second ram, and the second five-axis oscillating head provides a B2 axis that rotates around the Y2 axis and a C2 axis that rotates around the Z2 axis. The second electric spindle is mounted upright on the second five-axis oscillating head, and the second electric spindle is denoted as the SP2 axis.

[0007] The first chain-type tool magazine is located above the first rotary table, and the second chain-type tool magazine is located above the second rotary table. The first chain-type tool magazine is used to realize the automatic tool change of the first five-axis swivel head, and the second chain-type tool magazine is used to realize the automatic tool change of the second five-axis swivel head. The first rotary table and the second rotary table are coaxially arranged. The first rotary table and the second rotary table provide an A-axis that rotates around the X-axis of the machine tool. The first rotary table and the second rotary table are used to install fixtures, and the fixtures are used to clamp parts.

[0008] The X1, Y1, Z1, B1, C1, SP1, and A axes form channel one, and the X2, Y2, Z2, B2, C2, and SP2 axes form channel two. Channel one and channel two are controlled by a dual-channel CNC system. The first electric spindle and the second electric spindle are driven by channel one and channel two, respectively. The X1 and X2 axes are the gantry axes of channel one and channel two, respectively. The X1, Y1, and Z1 axes, as well as the X2, Y2, and Z2 axes, are driven by linear motors and equipped with grating rulers.

[0009] This invention relates to a high-speed dual-spindle machine tool employing a dual-spindle frame with a double-beam sliding saddle and ram, plus a five-axis swivel head, and equipped with dual rotary tables. It allows two electric spindles to simultaneously and independently process a single part, completing all six surfaces of the part in a single sequence. Compared to a single spindle, processing efficiency is doubled, and the footprint is significantly reduced, requiring less than half the floor space needed for the same production capacity. Furthermore, the X1, Y1, and Z1 axes, as well as the X2, Y2, and Z2 axes, are driven by linear motors and equipped with closed-loop linear encoders. The maximum rapid traverse speed reaches 110-120 m / min, significantly reducing non-cutting auxiliary time during part processing and increasing processing efficiency by 3-4 times. This makes it particularly suitable for mass-producing automotive parts, such as one-piece die-cast front compartments, rear floors, and battery packs. Moreover, the linear motor drive eliminates traditional bearings and lead screws between fixed and moving parts, greatly increasing the rigidity of the drive system and significantly improving dynamic acceleration and deceleration performance. This makes it especially suitable for processing automotive parts where rapid traverse positioning is a significant factor.

[0010] This invention relates to a high-speed dual-spindle machine tool. The X1, Y1, Z1, B1, C1, SP1, and A axes form channel one, while the X2, Y2, Z2, B2, C2, and SP2 axes form channel two. When axis A is rotated to the 0-degree position and stationary, the left-side X1, Y1, Z1, B1, C1, and SP1 axes function as a single five-axis gantry, enabling machining of any angle on the front of the part. Similarly, the right-side X2, Y2, Z2, B2, C2, and SP2 axes also function as a single five-axis gantry, also enabling machining of any angle on the front of the part. Channel one and channel two are controlled by a dual-channel CNC system. The first and second electric spindles are driven by channels one and two respectively, meaning one CNC system simultaneously controls two electric spindles and achieves synchronous machining. Therefore, the first and second electric spindles can machine simultaneously without interfering with each other. After the front side of the part is machined, the first and second turntables rotate 180 degrees, that is, the A-axis rotates 180 degrees, and the first and second electric spindles can machine the back side of the part simultaneously.

[0011] The rotation of the fixture is driven by the first and second turntables, enabling the operation of fixtures with greater weight and rotational inertia. This enhances the adaptability between parts and fixtures. The travel distances of the three axes are 3000mm, 2000mm, and 1250mm respectively, fully covering the machining of the front compartment, rear floor, and battery pack of passenger vehicles. After machining the front side of the part, the first and second turntables can quickly rotate the fixture to face the reverse side, saving the non-cutting auxiliary time required for loading, unloading, and clamping operations in a sequential manner. The first and second turntables enable a single-stage clamping process to complete all machining operations, avoiding positioning errors caused by repeated clamping and ensuring the relative positional accuracy of the front and back sides of the part.

[0012] The first and second electric spindles are each equipped with independent chain-type tool magazines, allowing for independent tool changes without interference and achieving fully automatic operation. Furthermore, the first chain-type tool magazine is located above the first rotary table, and the second chain-type tool magazine is located above the second rotary table, providing more maintenance space and enabling individual maintenance and adjustments.

[0013] Preferably, the top of the bed is equipped with two parallel side beams, each side beam being arranged along the X-axis of the bed, and each side beam having an X-guide rail. The X1 axis is driven by two first X-axis linear motors, which are symmetrically mounted on the front and rear sides of the bed. The secondary magnetic plate assemblies of the two first X-axis linear motors are respectively mounted on the two side beams, and the primary coil assemblies of the two first X-axis linear motors are respectively mounted on the front and rear sides of the first crossbeam. The X2 axis is driven by two second X-axis linear motors, which are symmetrically mounted on the front and rear sides of the bed. The secondary magnetic plate assemblies of the two second X-axis linear motors are respectively mounted on the two side beams, and the primary coil assemblies of the two second X-axis linear motors are respectively mounted on the front and rear sides of the second crossbeam.

[0014] Preferably, the first X-axis linear motor and the second X-axis linear motor installed on the front side of the bed share a secondary magnetic plate assembly, and the first X-axis linear motor and the second X-axis linear motor installed on the rear side of the bed share a secondary magnetic plate assembly, thereby further saving space and making the overall structure of the machine tool more compact.

[0015] Preferably, the Y1 axis is driven by a first Y-axis linear motor, the secondary magnetic plate assembly of the first Y-axis linear motor is mounted on the first crossbeam, and the primary coil assembly of the first Y-axis linear motor is mounted on the first saddle; the Z1 axis is driven by a first Z-axis linear motor, the secondary magnetic plate assembly of the first Z-axis linear motor is mounted on the first slide, and the primary coil assembly of the first Z-axis linear motor is mounted on the first saddle; the Y2 axis is driven by a second Y-axis linear motor, the secondary magnetic plate assembly of the second Y-axis linear motor is mounted on the second crossbeam, and the primary coil assembly of the second Y-axis linear motor is mounted on the second saddle; the Z2 axis is driven by a second Z-axis linear motor, the secondary magnetic plate assembly of the second Z-axis linear motor is mounted on the second slide, and the primary coil assembly of the second Z-axis linear motor is mounted on the second saddle.

[0016] Preferably, the bed and side beams are separate structures, with the bed itself being an integrated frame structure and fixed to the ground using anchor bolts. The separate structure of the bed and side beams reduces the overall transport height of the machine and the equipment requirements for individual part processing. The integrated frame structure of the bed ensures that even if the foundation settles over time, the main machine will settle as a whole, preventing significant deformation of machine tool components and avoiding substantial changes in machine tool accuracy.

[0017] Preferably, both the first and second five-axis swivel heads are eccentric swivel heads, which reduces the interference space when machining parts, reduces the use of angle head tool holders, reduces the overall tool cost, and increases the machining speed.

[0018] Compared with existing technologies, this invention has the following advantages: The high-speed dual-spindle machine tool of this invention adopts a dual-spindle frame with a double crossbeam sliding saddle and ram plus a five-axis swivel head, and is equipped with a double rotary table. It can realize the simultaneous independent processing of a part by two electric spindles, completing all six surfaces of the part in one sequence. Compared with a single spindle, the processing efficiency is doubled, and the footprint is smaller. The factory floor space for the same production capacity can be reduced by more than half. In addition, the X1, Y1, and Z1 axes, as well as the X2, Y2, and Z2 axes, are driven by linear motors and equipped with closed-loop grating rulers. The maximum rapid traverse speed can reach 110-120 m / min, which significantly reduces the non-cutting auxiliary time in the part processing process and improves the part processing efficiency by 3-4 times. It is especially suitable for processing mass-produced automotive parts, such as one-piece die-cast front compartments, rear floors, and battery packs. Furthermore, the machine tool is driven by a linear motor, eliminating the traditional transmission links such as bearings and lead screws between the fixed and moving parts. This greatly increases the rigidity of the drive system and significantly improves the dynamic operation performance of acceleration and deceleration, making it particularly suitable for the processing of automotive parts where rapid positioning accounts for a large proportion. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the high-speed dual-spindle machine tool driven by a linear motor, as shown in the embodiment.

[0020] Figure 2 This is a partial perspective view of the overall structure of the high-speed dual-spindle machine tool driven by a linear motor in the embodiment.

[0021] Figure 3 This is a top view of the high-speed dual-spindle machine tool driven by a linear motor in the embodiment.

[0022] Figure 4 This is a half-sectional view of the high-speed dual-spindle machine tool driven by a linear motor in the embodiment.

[0023] Figure 5 This is a diagram showing the state of the fixture when it is rotated to the front.

[0024] Figure 6 This is a diagram showing the state of the fixture when it is rotated to the back.

[0025] The specific reference numerals in the figure are as follows:

[0026] 1-Bed, 2-Side beam, 3-First crossbeam, 4-First slide saddle, 5-First slide ram, 6-First five-axis swivel head, 7-Second crossbeam, 8-Second slide saddle, 9-Second slide ram, 10-Second five-axis swivel head, 11-First rotary table, 12-Second rotary table, 13-First chain tool magazine, 14-Second chain tool magazine, 15-Secondary magnetic plate assembly, 16-Secondary magnetic plate assembly, 17-Primary coil assembly, 18-Primary coil assembly, 19-Primary coil assembly, 20-Primary coil assembly, 21-Secondary magnetic plate assembly, 22-Primary coil assembly, 23-Secondary magnetic plate assembly, 24-Primary coil assembly, 25-Secondary magnetic plate assembly, 26-Primary coil assembly, 27-Secondary magnetic plate assembly, 28-Primary coil assembly, 29-First electric spindle, 30-Secondary electric spindle, 31-X-guide rail, 32-Clamp. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] The embodiment of the high-speed twin-spindle machine tool driven by a linear motor, such as Figures 1-4 As shown, the machine includes a bed 1, a first spindle unit, and a second spindle unit. The bed 1 adopts an integrated frame structure and is fixed to the ground by anchor bolts. Two parallel side beams 2 are installed on the top of the bed 1. The bed 1 and the side beams 2 adopt a separate structure. Each side beam 2 is set along the X-axis of the bed 1 and an X-guide rail 31 is installed on each side beam 2. A first chain-type tool magazine 13 and a first rotary table 11 are installed on the left side of the bed 1, and a second chain-type tool magazine 14 and a second rotary table 12 are installed on the right side of the bed 1.

[0029] The first spindle unit includes a first crossbeam 3, a first saddle 4, a first ram 5, a first five-axis oscillating head 6, and a first electric spindle 29. The first crossbeam 3 is movably mounted on the left side of the two X-axis guide rails 31, and the left-right movement direction of the first crossbeam 3 is denoted as the X1 axis. The first saddle 4 is movably mounted on the first crossbeam 3, and the back-and-forth movement direction of the first saddle 4 is denoted as the Y1 axis. The first ram 5 is movably mounted on the first saddle 4, and the up-and-down movement direction of the first ram 5 is denoted as the Z1 axis. The first five-axis oscillating head 6 is mounted at the lower end of the first ram 5. The first five-axis oscillating head 6 provides a B1 axis that rotates around the Y1 axis and a C1 axis that rotates around the Z1 axis. The first electric spindle 29 is mounted upright on the first five-axis oscillating head 6, and the first electric spindle 29 is denoted as the SP1 axis.

[0030] The second spindle unit includes a second crossbeam 7, a second saddle 8, a second ram 9, a second five-axis oscillating head 10, and a second electric spindle 30. The second crossbeam 7 is movably mounted on the right side of the two X-axis guide rails 31, and the left-right movement direction of the second crossbeam 7 is denoted as the X2 axis. The second saddle 8 is movably mounted on the second crossbeam 7, and the back-and-forth movement direction of the second saddle 8 is denoted as the Y2 axis. The second ram 9 is movably mounted on the second saddle 8, and the up-and-down movement direction of the second ram 9 is denoted as the Z2 axis. The second five-axis oscillating head 10 is mounted at the lower end of the second ram 9. The second five-axis oscillating head 10 provides a B2 axis that rotates around the Y2 axis and a C2 axis that rotates around the Z2 axis. The second electric spindle 30 is mounted vertically on the second five-axis oscillating head 10, and the second electric spindle 30 is denoted as the SP2 axis.

[0031] The first chain tool magazine 13 is located above the first rotary table 11, and the second chain tool magazine 14 is located above the second rotary table 12. The first chain tool magazine 13 is used to realize the automatic tool change of the first five-axis swivel head 6, and the second chain tool magazine 14 is used to realize the automatic tool change of the second five-axis swivel head 10. The first rotary table 11 and the second rotary table 12 are coaxially arranged. The first rotary table 11 and the second rotary table 12 provide an A-axis that rotates around the X-axis of the machine tool. The first rotary table 11 and the second rotary table 12 are used to install the fixture 32, and the fixture 32 is used to clamp the parts.

[0032] The X1, Y1, Z1, B1, C1, SP1, and A axes form Channel 1, while the X2, Y2, Z2, B2, C2, and SP2 axes form Channel 2. Channel 1 and Channel 2 are controlled by a dual-channel CNC system. The first electric spindle 29 and the second electric spindle 30 are driven by Channel 1 and Channel 2, respectively. The X1 and X2 axes are the gantry axes of Channel 1 and Channel 2, respectively. The X1, Y1, and Z1 axes, as well as the X2, Y2, and Z2 axes, are driven by linear motors and equipped with grating rulers.

[0033] In this embodiment, both the first five-axis oscillating head 6 and the second five-axis oscillating head 10 are eccentric oscillating heads. The X1 axis is driven by two first X-axis linear motors, which are symmetrically installed on the front and rear sides of the bed 1. The secondary magnetic plate assemblies 15 and 16 of the two first X-axis linear motors are respectively installed on the two side beams 2, and the primary coil assemblies 17 and 18 of the two first X-axis linear motors are respectively installed on the front and rear sides of the first crossbeam 3. The X2 axis is driven by two second X-axis linear motors, which are symmetrically installed on the front and rear sides of the bed 1. The secondary magnetic plate assemblies 15 and 16 of the two second X-axis linear motors are respectively installed on the two side beams 2, and the primary coil assemblies 19 and 20 of the two second X-axis linear motors are respectively installed on the front and rear sides of the second crossbeam 7. The first and second X-axis linear motors installed on the front side of the bed 1 share the secondary magnetic plate assembly 15, while those installed on the rear side of the bed 1 share the secondary magnetic plate assembly 15. The first and second X-axis linear motors share a secondary magnetic plate assembly 16; the Y1 axis is driven by a first Y-axis linear motor, the secondary magnetic plate assembly 21 of the first Y-axis linear motor is mounted on the first crossbeam 3, and the primary coil assembly 22 of the first Y-axis linear motor is mounted on the first slide saddle 4; the Z1 axis is driven by a first Z-axis linear motor, the secondary magnetic plate assembly 23 of the first Z-axis linear motor is mounted on the first slide ram 5, and the primary coil assembly 24 of the first Z-axis linear motor is mounted on the first slide saddle 4; the Y2 axis is driven by a second Y-axis linear motor, the secondary magnetic plate assembly 25 of the second Y-axis linear motor is mounted on the second crossbeam 7, and the primary coil assembly 26 of the second Y-axis linear motor is mounted on the second slide saddle 8; the Z2 axis is driven by a second Z-axis linear motor, the secondary magnetic plate assembly 27 of the second Z-axis linear motor is mounted on the second slide ram 9, and the primary coil assembly 28 of the second Z-axis linear motor is mounted on the second slide saddle 8.

[0034] The parts of large automotive structural components such as the front compartment, rear floor, and battery pack, which are integrally die-cast, have symmetrical features and the machining features are evenly distributed from left to right. Using the aforementioned high-speed dual-spindle machine tool driven by linear motors can significantly reduce the overall machining time of the parts. During machining, the first electric spindle 29 processes the left side of the part, and the second electric spindle 30 processes the right side of the part. The first electric spindle 29 and the second electric spindle 30 process simultaneously, doubling the efficiency.

[0035] After the fixture 32 carrying the part is clamped on the first turntable 11 and the second turntable 12, the A-axis drives the fixture 32 and the part to rotate to the front, as shown. Figure 5 As shown, the first five-axis swivel head 6 and the second five-axis swivel head 10 can process features at any angle, simultaneously processing the front and four side features of the part. After the front of the part is processed, the A-axis rotates 180 degrees, and the fixture 32 rotates to the back side, as shown. Figure 6As shown, the first electric spindle 29 and the second electric spindle 30 simultaneously process the reverse side features and the remaining features on the four sides of the part. This allows for the completion of machining all surface features of the part in a single loading and unloading operation, avoiding positioning errors caused by multiple clamping operations after the part is processed in multiple sequences. It also saves the loading, unloading, and clamping time associated with multiple sequences, significantly improving the cycle time of the entire automated machining line in the automotive industry and greatly shortening the time from blank to finished product for a single part.

[0036] Taking the unibody die-cast rear floor of an automobile as an example, the number of part features varies among different car manufacturers. On average, processing using the high-speed dual-spindle machine tool of this invention takes approximately 8 minutes. The loading, unloading, and clamping time for the parts is generally around 45 seconds, and the time for rotating the A-axis 180 degrees is less than 3 seconds. By using a rotary table for sequential processing, 42 seconds can be saved. Based on an 8-minute processing cycle for one part, this equates to an efficiency improvement of 42 ÷ 60 ÷ 8 = 0.0875 = 8.75%. This nearly 9% efficiency improvement translates to a 9% increase in profit, representing a significant economic benefit. Furthermore, the high-speed dual-spindle machine tool of this invention features linear motor drives on all three axes, achieving a rapid traverse speed of 110-120 m / min, which is three times that of a conventional lead screw and twice that of a high-speed lead screw. Moreover, due to the linear motor configuration, the acceleration and deceleration dynamics are significantly enhanced in direct-drive mode.

[0037] For the unibody die-cast rear floor of an automobile, the machining time of a traditional single-spindle machine tool with a standard lead screw is approximately 30 minutes, including about 8 minutes of pure cutting time, about 16 minutes of rapid traverse positioning time, and about 6 minutes of chip-to-chip tool change time. When using a traditional single-spindle machine tool with a high-speed lead screw, the dynamic performance is similar, and the pure cutting time remains unchanged at 8 minutes. However, the rapid traverse speed is increased, with a rapid traverse positioning time of about 12 minutes and a chip-to-chip tool change time of about 5 minutes, for a total machining time of about 25 minutes. If the high-speed dual-spindle machine tool of this invention, equipped with a linear motor, is used, the cutting efficiency is doubled because both electric spindles process simultaneously. Simultaneously, the acceleration and deceleration dynamic performance is enhanced, reducing the pure cutting machining time to approximately 3.5 minutes. Since each spindle only processes the part on one side, the time spent moving from left to right is saved, and the enhanced acceleration and deceleration dynamic performance reduces rapid traverse positioning to approximately 2 minutes, and the chip-to-chip tool change time to approximately 2.5 minutes, for a total of 8 minutes. Based on this data, it is estimated that by using the high-speed dual-spindle motor with linear motor configuration of the present invention to process the same parts, the processing efficiency can reach 3.5-4 times that of ordinary single-spindle ball screw machine tools, and 3 times that of high-speed single-spindle ball screw machine tools.

[0038] The aforementioned high-speed twin-spindle machine tool also includes other components that enable its normal operation, all of which are conventional techniques in the art. Structures or components not specified in this invention employ conventional techniques in the art.

Claims

1. A high-speed dual-spindle machine tool driven by a linear motor, characterized in that, It includes a bed, a first spindle unit and a second spindle unit. The bed is provided with two X-guide rails. A first chain-type tool magazine and a first rotary table are installed on the left side of the bed. A second chain-type tool magazine and a second rotary table are installed on the right side of the bed. The first spindle unit includes a first crossbeam, a first saddle, a first ram, a first five-axis oscillating head, and a first electric spindle. The first crossbeam is movably mounted on the left side of the two X-axis guide rails, and the left-right movement direction of the first crossbeam is denoted as the X1 axis. The first saddle is movably mounted on the first crossbeam, and the front-back movement direction of the first saddle is denoted as the Y1 axis. The first ram is movably mounted on the first saddle, and the up-down movement direction of the first ram is denoted as the Z1 axis. The first five-axis oscillating head is mounted at the lower end of the first ram, and the first five-axis oscillating head provides a B1 axis that rotates around the Y1 axis and a C1 axis that rotates around the Z1 axis. The first electric spindle is mounted upright on the first five-axis oscillating head, and the first electric spindle is denoted as the SP1 axis. The second spindle unit includes a second crossbeam, a second saddle, a second ram, a second five-axis oscillating head, and a second electric spindle. The second crossbeam is movably mounted on the right side of the two X-axis guide rails, and the left-right movement direction of the second crossbeam is denoted as the X2 axis. The second saddle is movably mounted on the second crossbeam, and the back-and-forth movement direction of the second saddle is denoted as the Y2 axis. The second ram is movably mounted on the second saddle, and the up-and-down movement direction of the second ram is denoted as the Z2 axis. The second five-axis oscillating head is mounted at the lower end of the second ram, and the second five-axis oscillating head provides a B2 axis that rotates around the Y2 axis and a C2 axis that rotates around the Z2 axis. The second electric spindle is mounted upright on the second five-axis oscillating head, and the second electric spindle is denoted as the SP2 axis. The first chain-type tool magazine is located above the first rotary table, and the second chain-type tool magazine is located above the second rotary table. The first chain-type tool magazine is used to realize the automatic tool change of the first five-axis swivel head, and the second chain-type tool magazine is used to realize the automatic tool change of the second five-axis swivel head. The first rotary table and the second rotary table are coaxially arranged. The first rotary table and the second rotary table provide an A-axis that rotates around the X-axis of the machine tool. The first rotary table and the second rotary table are used to install fixtures, and the fixtures are used to clamp parts. The X1, Y1, Z1, B1, C1, SP1, and A axes form channel one, and the X2, Y2, Z2, B2, C2, and SP2 axes form channel two. Channel one and channel two are controlled by a dual-channel CNC system. The first electric spindle and the second electric spindle are driven by channel one and channel two, respectively. The X1 and X2 axes are the gantry axes of channel one and channel two, respectively. The X1, Y1, Z1, X2, Y2, and Z2 axes are driven by linear motors and equipped with grating rulers. The bed has two parallel side beams installed at the top, each side beam being arranged along the X-axis of the bed. Each side beam has an X-guide rail installed on it. The X1 axis is driven by two first X-axis linear motors, which are symmetrically installed on the front and rear sides of the bed. The secondary magnetic plate assemblies of the two first X-axis linear motors are respectively installed on the two side beams, and the primary coil assemblies of the two first X-axis linear motors are respectively installed on the front and rear sides of the first crossbeam. The X2 axis is driven by two second X-axis linear motors, which are symmetrically installed on the front and rear sides of the bed. The secondary magnetic plate assemblies of the two second X-axis linear motors are respectively installed on the two side beams, and the primary coil assemblies of the two second X-axis linear motors are respectively installed on the front and rear sides of the second crossbeam. The Y1 axis is driven by a first Y-axis linear motor, the secondary magnetic plate assembly of which is mounted on the first crossbeam, and the primary coil assembly of which is mounted on the first saddle. The Z1 axis is driven by a first Z-axis linear motor, the secondary magnetic plate assembly of which is mounted on the first slide, and the primary coil assembly of which is mounted on the first saddle. The Y2 axis is driven by a second Y-axis linear motor, the secondary magnetic plate assembly of which is mounted on the second crossbeam, and the primary coil assembly of which is mounted on the second saddle. The Z2 axis is driven by a second Z-axis linear motor, the secondary magnetic plate assembly of which is mounted on the second slide, and the primary coil assembly of which is mounted on the second saddle.

2. The high-speed dual-spindle machine tool driven by a linear motor according to claim 1, characterized in that, The first X-axis linear motor and the second X-axis linear motor installed on the front side of the bed share a secondary magnetic plate assembly, and the first X-axis linear motor and the second X-axis linear motor installed on the rear side of the bed also share a secondary magnetic plate assembly.

3. A high-speed dual-spindle machine tool driven by a linear motor according to claim 1, characterized in that, The bed and side beams are separate structures, the bed is an integrated frame structure, and the bed is fixed to the ground with anchor bolts.

4. A high-speed dual-spindle machine tool driven by a linear motor according to claim 1, characterized in that, Both the first and second five-axis oscillating heads are eccentric oscillating heads.

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