Five-axis machining center integrating material adding and milling functions and control method of five-axis machining center

Abstract

The invention discloses a five-axis machining center integrating material adding and milling functions. The five-axis machining center comprises symmetrically-arranged stand column frames (1), a movable cross beam frame (2) is arranged between the stand column frames (1) on the two sides, and a workbench (3) is arranged below the cross beam frame (2); the five-axis machining center further comprises a main supporting table (4) arranged on the workbench (3), a lifting mechanism (5) is arranged in the main supporting table (4), and a fixing clamp (6) is arranged on the upper surface of the main supporting table (4). And a movable material adding mechanism (7) and a movable milling mechanism (8) are arranged on the cross beam frame (2). By integrating the material adding and milling functions, integrated machining production is achieved, the production period is shortened, the production cost is reduced, and the combined machining advantage is brought into play.

Description

Technical Field

[0001] The present invention relates to the field of five-axis machining equipment, and in particular to a five-axis machining center integrating additive and milling functions and a control method thereof. Background Art

[0002] In the machinery industry, in order to cope with the increasingly high requirements for processing efficiency, precision and stability, five-axis machining centers have emerged. For example, the Chinese invention patent with publication number CN102049705A discloses a high-speed gantry five-axis machining center with exchangeable milling heads and direct drive, including a workbench, a left bridge, a right bridge, a beam moving on the left bridge and the right bridge, a slide, a ram, an AC double-swing head, and a head magazine. Two linear guides are placed on the left bridge and the right bridge respectively. The slide slides with the guide rails on the beam through a slider, and the ram and the slide are driven by a double screw. An AC double-swing head is installed at the bottom of the ram, and the head magazine is placed on one side of the workbench; the two ends of the beam are respectively mounted on the left bridge and the right bridge through slides. The X and Y directions of the five-axis machining center are directly driven by linear motors. The beam moves horizontally in the X direction along the left bridge and the right bridge, and the slide moves horizontally in the Y direction along the beam. The Z-direction dual motor center of gravity drives the ram, and the ram moves vertically in the Z direction on the slide. This type of five-axis machining center uses the same processing method as conventional five-axis machining centers. The workpiece surface is milled by the tool to remove the surface material of the workpiece to meet the workpiece precision requirements. For workpieces with complex structures or customization, additive processing is required. Generally, other equipment is used for processing, and then the workpiece is placed in the five-axis machining center for precision processing. This undoubtedly prolongs the production cycle, increases production costs, and leads to insufficient functional diversity. Summary of the Invention

[0003] The present invention aims to provide a five-axis machining center integrating additive and milling functions and a control method thereof. By integrating additive and milling functions, the present invention achieves integrated machining production, shortens production cycles, reduces production costs, and leverages the advantages of composite machining.

[0004] The technical solution of the present invention is a five-axis machining center integrating additive and milling functions, comprising symmetrically arranged column frames, movable crossbeam frames spanning the column frames on both sides, and a workbench arranged below the crossbeam frames; and further comprising: A main support platform is fixed to the workbench and is provided with a lifting mechanism inside. The lifting mechanism includes a circular platform that can be lifted vertically and is used to carry and lift the workpiece layer by layer during additive processing; A fixed fixture is provided on the upper surface of the main support platform and is used to clamp the workpiece on the fixed circular platform during milling; an additive mechanism independently disposed on the crossbeam and movable along the crossbeam, the additive mechanism comprising a five-axis linkage assembly and a nozzle connected to a feeding system, for performing additive manufacturing on the circular platform; A milling mechanism is independently arranged on the crossbeam and can move along the crossbeam, wherein the milling mechanism includes a five-axis linkage assembly and a milling tool, and is used to perform milling processing on the additively molded workpiece; The circular platform of the lifting mechanism is raised to the working position during additive processing, and is flush with the upper surface of the main support platform after being reset. The fixed fixture clamps the workpiece to switch to the milling processing mode.

[0005] In the above-mentioned five-axis machining center with integrated additive and milling functions, the main support platform includes a chassis arranged on the workbench, a circular ring seat is provided on the chassis, and an inner circular groove for placing a circular platform of the lifting mechanism is provided on the upper surface of the circular ring seat.

[0006] In the aforementioned five-axis machining center with integrated additive and milling functions, the lifting mechanism includes a motor support plate arranged in a circular ring seat, a lifting motor is provided on one side of the motor support plate, the output end of the lifting motor passes through the motor support plate and is connected to a driving gear at the output end of the lifting motor; a cylindrical frame is also provided in the circular ring seat, a lifting rod with a toothed portion is provided in the cylindrical frame, the circular platform is provided at the upper end of the lifting rod, and the driving gear is engaged with the toothed portion on the side of the lifting rod.

[0007] In the aforementioned five-axis machining center with integrated additive and milling functions, the fixed fixture includes a bar frame arranged on the main support platform, a dual-axis motor frame is provided on the bar frame, and a dual-axis motor is provided in the dual-axis motor frame; slides are provided at both ends of the bar frame through slide grooves, and the output end of the dual-axis motor is connected to a screw rod that cooperates with the slide; the slide is provided with a clamping side support for clamping the workpiece.

[0008] In the aforementioned five-axis machining center with integrated additive and milling functions, the clamping side support includes a right-angle frame arranged on the slide, a drive motor is provided on the rear side of the right-angle frame, a spur gear is provided at the output end of the drive motor, a rack meshing with the spur gear is provided on the flat plate of the right-angle frame, a connecting rod is provided at the outer end of the rack, and a clamping claw for clamping the workpiece on the circular platform is provided at the end of the connecting rod.

[0009] In the aforementioned five-axis machining center integrating additive and milling functions, the additive mechanism includes a longitudinal lifting member arranged on a crossbeam frame, the execution end of the longitudinal lifting member is provided with a first rotary unit, and a second rotary unit is provided on the front side of the first rotary unit, and the nozzle is connected to the execution end of the second rotary unit.

[0010] In the aforementioned five-axis machining center integrating additive and milling functions, a dust collection component for additive-assisted dust collection is provided on the front side of the second rotary unit.

[0011] In the aforementioned five-axis machining center with integrated additive and milling functions, the milling mechanism includes a z-axis lifting member arranged on a crossbeam frame, a third rotary unit is provided at the end of the z-axis lifting member, a fourth rotary unit is provided at the execution end of the second rotary unit, a milling spindle is provided at the execution end of the fourth rotary unit, and the milling tool is arranged in the milling spindle.

[0012] The control method of the aforementioned five-axis machining center integrating additive manufacturing and milling functions has the following specific steps: Step 1: During additive processing, the circular platform of the lifting mechanism is controlled to rise to the working position so that it is higher than the upper surface of the main support platform. The additive mechanism is driven to move along the crossbeam to above the circular platform, and the posture of the nozzle is adjusted through its five-axis linkage assembly. The feeding system supplies material to the nozzle. The additive mechanism controls the spatial trajectory of the nozzle through the five-axis linkage according to the preset workpiece model data, and deposits the material layer by layer on the circular platform. At the same time, the circular platform rises synchronously with the lifting mechanism until the additive manufacturing of the workpiece is completed; Step 2. After completing the additive manufacturing of the workpiece, the additive mechanism returns to the initial position of the crossbeam, and the circular platform of the lifting mechanism is controlled to descend and reset until it is flush with the upper surface of the main support platform. The fixing fixture is started to clamp the bottom of the additively formed workpiece, and the milling mechanism is driven to move along the crossbeam to the top of the workpiece, and the posture of the milling tool is adjusted through its five-axis linkage assembly; the milling mechanism performs precision machining on the workpiece according to the set milling parameters, and returns to the initial position after completion; the fixing fixture is released, and the circular platform of the lifting mechanism is raised to facilitate the removal of the processed workpiece.

[0013] In the aforementioned control method of the five-axis machining center integrating additive and milling functions, in step 1, when the nozzle of the additive mechanism is discharging material, the dust collection component on its side will swing accordingly to absorb and purify the exhaust gas generated when the nozzle is discharging material.

[0014] Compared with the prior art, the present invention has the following advantages: 1. In the present invention, the circular platform of the lifting mechanism is raised to the working position so that it is higher than the upper surface of the main support platform, and the additive mechanism is driven to move along the crossbeam to above the circular platform, and the posture of the nozzle is adjusted through its five-axis linkage component, and the feeding system supplies material to the nozzle. The additive mechanism controls the spatial trajectory of the nozzle through the five-axis linkage according to the preset workpiece model data, and stacks the material layer by layer on the circular platform. At the same time, the circular platform rises synchronously with the lifting mechanism until the additive manufacturing of the workpiece is completed; the additive mechanism returns to the initial position of the crossbeam, and the circular platform of the lifting mechanism is controlled to descend and reset until it is flush with the upper surface of the main support platform, and the fixing fixture is started to clamp the bottom of the additively formed workpiece, and the milling mechanism is driven to move along the crossbeam to above the workpiece, and the posture of the milling tool is adjusted through its five-axis linkage component; the milling mechanism performs precision machining on the workpiece according to the set milling parameters, and then returns to the initial position after completion; the composite machining mode realizes centralized control and management of the entire machining process, effectively reducing the time loss caused by equipment switching and process connection in traditional machining methods, greatly shortening the production cycle, and significantly improving production efficiency. In addition, the present invention integrates two processing functions into one, eliminating the need to purchase multiple additional devices, effectively saving equipment investment costs; at the same time, it simplifies the production process, reduces the manpower required for equipment operation and maintenance, and reduces labor costs.

[0015] 2. In the fixing fixture, the clamping side branch clamps the workpiece through a gear rack structure, thereby improving the stability of the clamping and facilitating the milling mechanism to process the workpiece.

[0016] 3. During the additive manufacturing process, in order to avoid interference between the fixture and the additive mechanism, the additive processing platform is lifted by the lifting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a structural diagram of the main support platform; Figure 3 is a schematic diagram of the lifting mechanism; Figure 4 is a schematic diagram of the lifting rod; Figure 5 is a schematic diagram of the fixing fixture; Figure 6 Schematic diagram of the additive mechanism; Figure 7 Schematic diagram of the milling mechanism.

[0018] Explanation of the symbols in the accompanying drawings: 1-column frame, 2-beam frame, 3-workbench, 4-main support platform, 5-lifting mechanism, 6-fixing fixture, 7-additive mechanism, 8-milling mechanism, 9-chassis, 10-circular ring seat, 11-inner circle groove, 12-motor support plate, 13-lifting motor, 14-driving gear, 15-cylinder frame, 16-lifting rod, 17-circular platform, 18-strip frame, 19-dual-axis motor frame, 20-dual-axis motor , 21-slide, 22-screw, 23-clamping side support, 24-right angle frame, 25-drive motor, 26-spur gear, 27-connecting rod, 28-clamping claw, 29-longitudinal lifting member, 30-first rotary unit, 31-second rotary unit, 32-nozzle, 33-dust suction assembly, 34-z-axis lifting member, 35-third rotary unit, 36-fourth rotary unit, 37-milling spindle, 38-milling tool, 39-rack. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0020] Embodiment: A five-axis machining center integrating additive and milling functions includes a symmetrically arranged column frame 1, as shown in the attached Figure 1 As shown, a movable crossbeam frame 2 is provided between the column frames 1 on both sides, and a workbench 3 is provided below the crossbeam frame 2; the five-axis machining center also includes a main support platform 4, as shown in the attached Figure 2 As shown, it is fixed on the workbench (3), and a lifting mechanism (5) is provided inside the workbench, and the lifting mechanism (5) includes a circular platform (17) that can be lifted vertically, and is used to carry and lift the workpiece layer by layer during additive processing; the main support platform 4 includes a chassis 9 arranged on the workbench 3, and a circular seat 10 is provided on the chassis 9, and the upper surface of the circular seat 10 is provided with an inner circular groove 11 for placing the circular platform (17) of the lifting mechanism 5; The lifting mechanism 5 is arranged in the main support platform 4. The lifting mechanism 5 is used to raise the platform height of the workpiece when the workpiece is added. The additive manufacturing technology is based on the three-dimensional model data, and the material is stacked layer by layer to finally form the desired object shape. The lifting mechanism 5 includes a motor support plate 12 arranged in the annular seat 10, as shown in the attached figure. Figure 3 and 4As shown, a lifting motor 13 is provided on one side of the motor support plate 12, and the output end of the lifting motor 13 passes through the motor support plate 12 and is connected to a driving gear 14 at the output end of the lifting motor 13; a cylindrical frame 15 is also installed in the circular ring seat 10, and a lifting rod 16 with a toothed portion is provided in the cylindrical frame 15, and a circular platform 17 is provided on the upper end of the lifting rod 16, which fits with the inner circular groove 11. After resetting, the circular platform will fit into the inner circular groove. There is a step between the inner circular groove and the upper surface of the circular ring seat, and the circular platform is mounted on the step. The circular platform remains flush with the upper end surface of the circular ring seat, which is convenient for subsequent clamping; The driving gear 14 is engaged with the toothed portion on the side of the lifting rod 16. The lifting motor drives the driving gear to rotate, and the driving gear is engaged with the toothed portion on the side of the lifting rod to realize the lifting of the circular platform. The side of the cylindrical frame has a semicircular groove, and the toothed portion on the side of the lifting rod is exposed in the semicircular groove.

[0021] The fixing fixture 6 is arranged on the upper surface of the main support platform 4. Figure 5 As shown, it is used to clamp the workpiece on the fixed circular platform (17) during milling processing; the fixed fixture 6 includes a strip frame 18 arranged on the main support platform 4, and a double-axis motor frame 19 is installed on the strip frame 18, and a double-axis motor 20 is installed in the double-axis motor frame 19; the two ends of the strip frame 18 are provided with slides 21 through slide grooves, and the output end of the double-axis motor 20 is connected to a screw rod 22 that matches with the slide 21, and the screw threads on both sides have opposite rotation directions. When the screw rod rotates, the movement directions of the slides on both sides are opposite; a clamping side branch 23 for clamping the workpiece is provided on the slide 21; after the double-axis motor drives the screw rod to rotate, the spacing between the clamping side branches can be expanded or reduced, and the clamping side branches can be brought close to the workpiece through the slide, and the clamping side branches can be kept close to the workpiece by a certain distance. The clamping side branch 23 includes a right-angle frame 24 set on the slide 21, a driving motor 25 is installed on the rear side of the right-angle frame 24, and a spur gear 26 is provided at the output end of the driving motor 25. A rack 39 meshing with the spur gear 26 is installed on the plane plate of the right-angle frame 24, and a connecting rod 27 is installed at the outer end of the rack 39. A clamping claw 28 for clamping the workpiece on the circular platform 17 is installed at the end of the connecting rod 27. The driving motor drives the spur gear to rotate, so that the racks on both sides retract, and the clamping claws on both sides approach and clamp the bottom of the workpiece. In additive processing, a base is usually manufactured on the circular platform as a positioning basis. The clamping claw clamps the base. Through two displacements, the stability of the clamping positioning is improved, providing a stable environment for subsequent milling processing.

[0022] The material adding mechanism 7 is movably arranged on the crossbeam frame 2, as shown in the attached Figure 6As shown, the additive mechanism 7 is used to additively manufacture workpieces on the platform of the lifting mechanism 5; the additive mechanism 7 includes a longitudinal lifting member 29 arranged on the crossbeam frame 2, and the longitudinal lifting member is mainly composed of a screw slider transmission structure. The execution end of the longitudinal lifting member 29 is installed with a first rotary unit 30, and the front side of the first rotary unit 30 is installed with a second rotary unit 31. The end of the second rotary unit 31 is provided with a nozzle 32 connected to the feeding system; in the present invention, the crossbeam frame can move along the column frame, which is the X-axis direction, and the additive mechanism is arranged on the crossbeam frame through a transverse moving mechanism. The transverse moving mechanism is mainly a screw slider structure. The additive mechanism moves along the crossbeam frame, which is the Y-axis direction, and the longitudinal lifting member realizes movement in the Z-axis direction. The first rotary unit can rotate around the vertical axis, and the second rotary unit can rotate around the transverse axis, thereby forming a five-axis coordinate system. When the additive mechanism is running, first, use three-dimensional modeling software to design a three-dimensional digital model of the required parts, or obtain a three-dimensional model of an existing object by three-dimensional scanning or other methods. This model is the foundation of additive manufacturing, containing all the geometric information and dimensional parameters of the part. The 3D model is imported into the control system of the additive manufacturing equipment, which slices the model along specific directions, breaking it down into a series of very thin 2D slices. Each slice contains the contour information of that layer and the relevant printing parameters. The appropriate material is selected based on the additive manufacturing technology and the performance requirements of the part. The nozzle achieves five-axis motion according to the set parameters, depositing the workpiece shape along a predetermined path. A dust collection assembly 33 for auxiliary dust collection in additive manufacturing is provided on the front side of the second rotary unit 31. The dust collection assembly mainly includes a dust collection hood, a flexible dust collection hose, a negative pressure vacuum unit, and a negative pressure conveying pipeline. During the additive manufacturing process, technologies such as powder bed fusion and binder jetting generate powder dust. Printing filamentary materials may also generate plastic debris. The dust collection assembly can promptly remove this powder and debris to prevent it from spreading around the equipment, maintaining a clean workplace and reducing pollution to the production environment. The dust collection assembly can also absorb and purify exhaust gas.

[0023] The milling mechanism 8 is movably mounted on the crossbeam 2 and is used to process additively manufactured workpieces. The milling mechanism 8 includes a z-axis lift 34 mounted on the crossbeam 2. A third rotary unit 35 is mounted at the end of the z-axis lift 34. A fourth rotary unit 36 ​​is mounted at the actuating end of the second rotary unit 31. A milling spindle 37 is mounted at the actuating end of the fourth rotary unit 36. A milling tool 38 is mounted within the milling spindle 37. The milling spindle can drive the milling tool to rotate at a high speed, removing material from the workpiece surface. The milling mechanism is equipped with a tool magazine for tool changing. A 3D scanning head is placed in the tool magazine, and the cutting spindle can be equipped with the 3D scanning head to scan the dimensions of the workpiece.

[0024] The control method of the five-axis machining center integrating additive and milling functions comprises the following specific steps: Step 1: The lifting motor in the first lifting mechanism operates, and the circular platform carrying the workpiece is smoothly lifted to a set height through the meshing transmission of the driving gear and the toothed portion on the side of the lifting rod. Subsequently, the additive mechanism moves along a predetermined trajectory on the crossbeam frame, and the longitudinal lifting member drives the first rotary unit, the second rotary unit, and the nozzle to descend to the appropriate position. The feeding system starts feeding, and the additive mechanism deposits the material layer by layer on the circular platform according to the preset workpiece model data to complete the additive manufacturing of the workpiece. When the nozzle of the additive mechanism discharges the material, the dust collection component on its side will swing accordingly to absorb and purify the exhaust gas generated by the nozzle when discharging the material. Step 2. When the additive manufacturing process is completed, the longitudinal lifting member of the additive mechanism drives the relevant components to rise, and the additive mechanism returns to its initial position along the crossbeam frame; at the same time, the lifting motor runs in reverse to lower and reset the circular platform until it is at the same horizontal height as the upper end surface of the main support platform; then, the dual-axis motor of the fixed fixture drives the lead screw to rotate, driving the slide to move along the slide groove of the strip frame, so that the clamping side branch is close to the bottom of the workpiece; the driving motor of the clamping side branch is started, and through the meshing transmission of the gear and the rack, the clamping claw is pushed to close and firmly clamp the workpiece; finally, the z-axis lifting member of the milling mechanism drives the third rotary unit, the fourth rotary unit and the milling spindle to descend, and the milling mechanism moves to the workpiece processing position. Driven by the milling spindle, the milling tool performs fine processing on the workpiece according to the set milling parameters.

Claims

1. A five-axis machining center integrating additive and milling functions, comprising symmetrically arranged column frames (1), movable crossbeam frames (2) spanning the column frames (1) on both sides, and a workbench (3) arranged below the crossbeam frames (2); characterized in that: Also includes: A main support platform (4) is fixed on the workbench (3), and a lifting mechanism (5) is provided inside the main support platform. The lifting mechanism (5) includes a circular platform (17) that can be lifted vertically and is used to carry and lift the workpiece layer by layer during additive processing; A fixing fixture (6) is provided on the upper surface of the main support platform (4) and is used for clamping a workpiece on the fixed circular platform (17) during milling processing; an additive mechanism (7) independently arranged on the crossbeam frame (2) and movable along the crossbeam frame (2), the additive mechanism (7) comprising a five-axis linkage assembly and a nozzle (32) connected to a feeding system, for performing additive manufacturing on the circular platform (17); A milling mechanism (8) is independently arranged on the crossbeam frame (2) and can move along the crossbeam frame (2), wherein the milling mechanism (8) includes a five-axis linkage assembly and a milling tool (38) for performing milling processing on an additively molded workpiece; The circular platform (17) of the lifting mechanism (5) is raised to a working position during additive processing and is flush with the upper surface of the main support platform (4) after being reset. The fixed fixture (6) clamps the workpiece to switch to the milling processing mode.

2. The five-axis machining center integrating additive manufacturing and milling functions according to claim 1, characterized in that: The main support platform (4) comprises a chassis (9) arranged on a workbench (3), a circular ring seat (10) is provided on the chassis (9), and an inner circular groove (11) is provided on the upper surface of the circular ring seat (10) for placing a circular platform (17) of a lifting mechanism (5).

3. The five-axis machining center integrating additive manufacturing and milling functions according to claim 2, characterized in that: The lifting mechanism (5) comprises a motor support plate (12) arranged in a circular ring seat (10), a lifting motor (13) is provided on one side of the motor support plate (12), an output end of the lifting motor (13) passes through the motor support plate (12) and a driving gear (14) is connected to the output end of the lifting motor (13); a cylindrical frame (15) is further provided in the circular ring seat (10), a lifting rod (16) with a toothed portion is provided in the cylindrical frame (15), the circular platform is provided at the upper end of the lifting rod, and the driving gear (14) is meshed with the toothed portion on the side of the lifting rod (16).

4. The five-axis machining center integrating additive manufacturing and milling functions according to claim 3, characterized in that: The fixing fixture (6) comprises a strip frame (18) arranged on the main support platform (4), a double-axis motor frame (19) is provided on the strip frame (18), and a double-axis motor (20) is provided in the double-axis motor frame (19); slide seats (21) are provided at both ends of the strip frame (18) through slide grooves, and the output end of the double-axis motor (20) is connected to a screw rod (22) matched with the slide seat (21); and a clamping side support (23) for clamping a workpiece is provided on the slide seat (21).

5. The five-axis machining center integrating additive manufacturing and milling functions according to claim 4, characterized in that: The clamping side support (23) includes a right-angle frame (24) arranged on a slide (21), a driving motor (25) is provided on the rear side of the right-angle frame (24), a spur gear (26) is provided at the output end of the driving motor (25), a rack (39) meshing with the spur gear (26) is provided on a plane plate of the right-angle frame (24), a connecting rod (27) is provided at the outer end of the rack (39), and a clamping claw (28) for clamping a workpiece on the circular platform (17) is provided at the end of the connecting rod (27).

6. The five-axis machining center integrating additive manufacturing and milling functions according to claim 1, characterized in that: The material adding mechanism (7) includes a longitudinal lifting member (29) arranged on a crossbeam frame (2), a first rotary unit (30) is provided at an execution end of the longitudinal lifting member (29), a second rotary unit (31) is provided at the front side of the first rotary unit (30), and the nozzle (32) is connected to the execution end of the second rotary unit (31).

7. The five-axis machining center integrating additive manufacturing and milling functions according to claim 6, characterized in that: A dust collection assembly (33) for material-assisted dust collection is provided on the front side of the second rotary unit (31).

8. The five-axis machining center integrating additive manufacturing and milling functions according to claim 1, characterized in that: The milling mechanism (8) includes a z-axis lifting member (34) arranged on a crossbeam frame (2), a third rotary unit (35) is provided at the end of the z-axis lifting member (34), a fourth rotary unit (36) is provided at the execution end of the second rotary unit (31), a milling spindle (37) is provided at the execution end of the fourth rotary unit (36), and the milling tool (38) is arranged in the milling spindle (37).

9. The control method of a five-axis machining center integrating additive manufacturing and milling functions according to any one of claims 1 to 8, characterized in that: The specific steps are as follows: Step 1: During additive processing, the circular platform of the lifting mechanism is controlled to rise to the working position so that it is higher than the upper surface of the main support platform. The additive mechanism is driven to move along the crossbeam to above the circular platform, and the posture of the nozzle is adjusted through its five-axis linkage assembly. The feeding system supplies material to the nozzle. The additive mechanism controls the spatial trajectory of the nozzle through the five-axis linkage according to the preset workpiece model data, and deposits the material layer by layer on the circular platform. At the same time, the circular platform rises synchronously with the lifting mechanism until the additive manufacturing of the workpiece is completed; Step 2. After completing the additive manufacturing of the workpiece, the additive mechanism returns to the initial position of the crossbeam, and the circular platform of the lifting mechanism is controlled to descend and reset until it is flush with the upper surface of the main support platform. The fixing fixture is started to clamp the bottom of the additively formed workpiece, and the milling mechanism is driven to move along the crossbeam to the top of the workpiece, and the posture of the milling tool is adjusted through its five-axis linkage assembly; the milling mechanism performs precision machining on the workpiece according to the set milling parameters, and returns to the initial position after completion; the fixing fixture is released, and the circular platform of the lifting mechanism is raised to facilitate the removal of the processed workpiece.

10. The control method of a five-axis machining center integrating additive manufacturing and milling functions according to claim 9, characterized in that: In step 1, when the nozzle of the additive mechanism is discharging material, the dust collection component on the side thereof will swing accordingly to absorb and purify the waste gas generated when the nozzle is discharging material.

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