Five-axis additive and subtractive machining equipment and control method thereof

Abstract

Five-axis additive and subtractive machining equipment and a control method thereof.The five-axis additive and subtractive machining equipment comprises a five-axis additive and subtractive machining machine (100) and a laser head protection device (200), the five-axis additive and subtractive machining machine (100) comprises a three-dimensional printing shaft (140), a main shaft (150) and a rotary table (131), the three-dimensional printing shaft (140) is provided with a laser head (141), and the laser head protection device (200) comprises a mounting block (220) and a protection cover (210) used for covering the laser head (141). The protective cover (210) is connected to the mounting block (220) through the cooperation of the clamping groove (212) and the clamping convex edge (221), the protective cover (210) can be connected with or separated from the mounting block (220), and the upper plane of the protective cover (210) is provided with a magnet (211) used for being connected with a three-dimensional printing shaft (140). The control method comprises the following steps: performing additive machining and subtractive machining on the part, separating the protective cover (210) from the laser head (141) before the additive machining, and covering the laser head (141) with the protective cover (210) before the subtractive machining. Through continuous switching machining of additive and subtractive machining and arrangement of the laser head protection device convenient to disassemble and assemble, the machining problem of parts with complex shapes such as special-shaped metal parts is solved, and the machining precision and the machining efficiency are improved.

Description

Five-axis additive and subtractive machining equipment and control method thereof Technical Field

[0001] The invention relates to five-axis additive and subtractive machining equipment and a control method thereof, and belongs to the technical field of automated machining. Background Art

[0002] Industrial manufacturing is a pillar of a nation and directly reflects its productivity. With the rapid development of process technology, the demand for integrated, high-performance, and high-reliability applications has become a key development direction for the manufacturing industry. The demand for integrated equipment is increasing, and the structures of key components are becoming increasingly complex. High-performance, hard-to-machine metal integrated manufacturing of key components is considered the foundation and core technology for high-end equipment manufacturing in advanced industries such as aviation, nuclear power, petrochemicals, and shipbuilding.

[0003] For industrial manufacturing, the processing is the process of converting raw materials into final industrial products. From the perspective of manufacturing process, it can be divided into "equivalent material manufacturing", "subtractive manufacturing" and "additive manufacturing". Among them, equivalent material manufacturing represented by mold injection molding and casting processing has a long history and rich experience, while subtractive manufacturing with machining as the core and additive manufacturing represented by 3D printing have a shorter history and contain part forming problems that need to be optimized. At the same time, most traditional manufacturing equipment adopts a forming method with a single manufacturing process. The use of a single forming method to manufacture the above-mentioned large-scale, integrated, high-performance metal parts not only requires dedicated large-scale casting, forging and welding equipment and molds, but also has prominent problems such as difficult manufacturing technology, long processing cycle, low material utilization, and unstable part performance.

[0004] In the high-end equipment manufacturing industry, for the internal and external machining of complex parts (such as special-shaped metal tubes), single additive or subtractive machining methods are no longer sufficient, leading to the emergence of additive and subtractive machining equipment. However, the machining quality, speed, and precision of existing additive and subtractive machining equipment need to be improved. The reasons include: some equipment requires the replacement of machining heads or complex head position changes when switching between additive and subtractive machining; and some equipment is prone to mutual interference during the machining process, such as collisions and contamination of machining heads.

[0005] Summary of the Invention

[0006] The present invention provides a five-axis additive and subtractive machining device and control method thereof, aiming to address at least one of the technical issues existing in the prior art. To this end, the present invention proposes a five-axis additive and subtractive machining device and control method thereof. By continuously switching between additive and subtractive machining, the device addresses the machining challenges of complex parts. Furthermore, by providing a laser head protection device, the device reduces the risk of laser head contamination, thereby improving machining accuracy.

[0007] The technical solution of the present invention relates to a five-axis additive and subtractive machining device, comprising:

[0008] A five-axis additive and subtractive machining machine comprising a 3D printing axis for additive machining, a main axis for subtractive machining, and a turntable for placing a workpiece, wherein the 3D printing axis is provided with a laser head;

[0009] A laser head protection device comprises a mounting block and a protective cover for covering the laser head; the mounting block is provided with a retaining convex edge and a retaining ring, the retaining convex edge is provided on the inner wall of the retaining ring, and the retaining ring is provided with a cover inlet; the outer periphery of the protective cover is provided with a retaining groove;

[0010] In which, the protective cover is connected to the mounting block through the locking groove and the locking convex edge, and the protective cover is connected to or detached from the mounting block through the cover inlet and the three-dimensional printing shaft; the upper plane of the protective cover is provided with a magnet for connecting the three-dimensional printing shaft.

[0011] Furthermore, the mounting block includes a ball plunger; the ball plunger protrudes from the inner wall of the mounting block to abut against the protective cover.

[0012] Furthermore, the mounting block is provided with a bottom plate, and the bottom plate partially covers the lower opening of the retaining ring; both sides of the mounting block and the bottom plate are provided with mounting channels for mounting the ball plunger.

[0013] Furthermore, the protective cover is provided with a first cover body and a second cover body from top to bottom, the outer diameter of the first cover body is larger than the inner diameter of the retaining ring, and the outer diameter of the second cover body is smaller than or equal to the inner diameter of the retaining ring.

[0014] Furthermore, the laser head protection device also includes a protective cover, which includes a box body and a fixed plate, the box body is provided with an extension port, and the fixed plate is arranged in the box body; the mounting block is movably arranged on the fixed plate to extend or retract the protective cover into or out of the box body through the extension port.

[0015] Furthermore, the box body includes a sealing plate for covering the extension opening, and the sealing plate is arranged on a side of the mounting block facing the extension opening.

[0016] Furthermore, the fixing plate is provided with a proximity switch for detecting the position of the mounting block; the mounting block is provided with a positioning plate for triggering the proximity switch, and the positioning plate is provided on a side of the mounting block facing away from the extension port.

[0017] Furthermore, the five-axis additive and subtractive machining center includes a base and a gantry, the gantry is arranged on the base, the three-dimensional printing axis and the main shaft are movably arranged on the crossbeam on the gantry, and the turntable is movably arranged on the base and between the two columns of the gantry.

[0018] Furthermore, the three-dimensional printing axis and the main axis are both arranged on the gantry so as to be synchronously movable horizontally via a translation slide.

[0019] Furthermore, the three-dimensional printing axis and the main axis are respectively arranged on the translation slide through two lifting slides, wherein the two lifting slides can move independently.

[0020] Furthermore, the lifting slide is movably arranged on the translation slide via a lifting guide rail.

[0021] Furthermore, the turntable is arranged on a telescopic slide, and the telescopic slide is movably arranged on the base through a telescopic guide rail, and the telescopic guide rail is arranged between the two columns of the gantry.

[0022] Another aspect of the technical solution of the present invention relates to a five-axis additive and subtractive machining device, which is applied to the five-axis additive and subtractive machining device of the above embodiment. The method according to the present invention includes the following steps:

[0023] S100, obtaining an additive manufacturing instruction for a current portion of a part; determining whether the laser head is currently covered by the protective cover; if so, moving the 3D printing shaft so that the positioning convex edge engages with the positioning groove, and then moving the 3D printing shaft upward to separate the protective cover from the laser head;

[0024] S200, by moving the 3D printing axis on the X axis and / or the Z axis, moving the turntable on the Y axis, and rotating the turntable on the A axis and / or the B axis, the laser head completes additive processing of the current portion of the part;

[0025] S300, obtaining a subtractive machining instruction for a current portion of a part; determining whether the laser head is currently covered by the protective cover; if not, moving the 3D printing axis so that the laser head reaches above the protective cover, moving the 3D printing axis downward so that the protective cover covers the laser head via the magnet, and then moving the 3D printing axis horizontally so that the protective cover is separated from the mounting block;

[0026] S400, by moving the 3D printing axis on the X axis and / or the Z axis, moving the turntable on the Y axis, and rotating the turntable on the A axis and / or the B axis, so that the tool of the spindle completes subtractive processing on the current part of the part;

[0027] S500 , repeating steps S100 to S400 to perform additive and subtractive processing on the next part until the processing instructions for the entire part are completed.

[0028] Furthermore, the step S200 includes the following steps:

[0029] The main spindle and the three-dimensional printing axis are moved horizontally synchronously so that the laser head reaches above the turntable; the tool of the main spindle is retracted upward and the laser head is extended downward to perform additive processing.

[0030] Furthermore, the step S400 includes the following steps:

[0031] The main spindle and the three-dimensional printing axis are moved horizontally synchronously so that the tool of the main spindle reaches above the turntable; the tool of the main spindle extends downward and the laser head extends upward to perform subtractive processing.

[0032] Furthermore, in step S400, the tool of the spindle performs subtractive processing on the inner side or the outer side of the current part.

[0033] Another aspect of the technical solution of the present invention relates to a control method for a five-axis additive and subtractive machining apparatus for machining special-shaped metal parts having an inner cavity, and is applied to the five-axis additive and subtractive machining apparatus of the above-mentioned embodiment of the present invention; the method comprises the following steps:

[0034] Step A: Initializing or locating the position of the special-shaped metal part;

[0035] Step B: determining whether the laser head is currently covered by the protective cover; if so, moving the 3D printing axis to separate the protective cover from the laser head;

[0036] Step C: driving the spindle to retract upward, driving the three axes of the 3D printing axis to move and coordinating with the A axis and / or B axis of the turntable to rotate, and performing five-axis additive manufacturing on the special-shaped metal part through the laser head;

[0037] Step D: Determine whether the additive manufacturing instruction is executed, and if so, move the three-dimensional printing axis so that the protective cover covers the laser head;

[0038] Step E: Determine whether to execute the subtractive machining instruction. If so, drive the 3D printing axis to retract upward, drive the three axes of the spindle to move and coordinate with the A axis and / or B axis of the turntable to rotate, and use the tool to perform five-axis linkage subtractive machining on the inner and outer sides of the special-shaped metal part;

[0039] Step F: Determine whether the additive processing instruction has been completed. If so, repeat steps B to E until the workpiece processing instruction is completed.

[0040] Furthermore, the special-shaped metal part includes a first workpiece body, a second workpiece body and a third workpiece body connected in sequence, each having an inner cavity. The first workpiece body and the third workpiece body are straight bodies, and the second workpiece body is a curved body.

[0041] The beneficial effects of the present invention are as follows.

[0042] The five-axis additive and subtractive machining equipment and its control method of the present invention are provided with a three-dimensional printing axis, a main axis and a turntable, which can realize continuous switching between additive and subtractive machining, thereby facilitating solving the problem of integrated machining of parts with complex shapes; the use of an integrated forming method for parts avoids multiple clamping and positioning of parts, which is conducive to improving machining accuracy and efficiency, and meeting the requirements for machining high-performance parts; the three-dimensional printing axis and the main axis can move horizontally synchronously and independently up and down, and are provided with a laser head protection device, which can reduce the mutual interference between additive and subtractive machining, and improve the switching rate of machining modes, thereby reducing the difficulty of system control. The laser head protection device is provided to protect the laser head during subtractive machining, which is conducive to preventing the laser head from being contaminated by cutting fluid, debris, etc., thereby improving machining quality; the laser head protection device uses a magnetic suction method to quickly detach or cover the laser head, and at the same time uses a locking convex edge and a locking groove to quickly detach or connect the protective cover to the mounting block, thereby meeting the requirements for frequent switching of machining modes during additive and subtractive machining, and is conducive to ensuring machining speed while improving machining quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 is a first structural schematic diagram of a five-axis additive and subtractive machining apparatus according to an embodiment of the present invention.

[0044] FIG2 is a second structural schematic diagram of a five-axis additive and subtractive machining apparatus according to an embodiment of the present invention.

[0045] FIG3 is a schematic structural diagram of a five-axis additive and subtractive machining machine according to an embodiment of the present invention.

[0046] FIG. 4 is a schematic structural diagram of a protection cover according to an embodiment of the present invention.

[0047] FIG5 is a schematic structural diagram of a mounting block according to an embodiment of the present invention.

[0048] FIG6 is a top schematic diagram of a laser head protection device according to an embodiment of the present invention.

[0049] FIG. 7 is a schematic structural diagram of a laser head protection device according to an embodiment of the present invention.

[0050] FIG8 is a control flow chart of the method according to the present invention.

[0051] FIG9 is a schematic structural diagram of an example part according to an embodiment of the present invention.

[0052] FIG. 10 is a first schematic diagram of additive manufacturing of an example part according to an embodiment of the present invention.

[0053] FIG. 11 is a schematic diagram of subtractive machining of an example part according to an embodiment of the present invention.

[0054] FIG. 12 is a second schematic diagram illustrating additive manufacturing of an example part according to an embodiment of the present invention.

[0055] Reference numerals: 100 five-axis additive and subtractive machining machine; 111 base; 112 gantry; 130 worktable; 131 turntable; 140 three-dimensional printing axis; 141 laser head; 142 positioning pin; 150 main shaft; 161 lifting slide; 162 lifting guide rail; 171 translation slide; 172 translation guide rail; 181 telescopic slide; 182 telescopic guide rail; 200 laser head protection device; 210 protection cover; 211 magnet; 212 locking groove; 213 recess; 214 positioning hole; 215 first cover body; 216 second cover body; 220 mounting block; 221 locking flange; 222 locking ring; 223 bottom plate; 224 ball plunger; 225 positioning plate; 230 protective cover; 231 housing; 232 fixing plate; 233 sealing plate; 240 telescopic actuator; 250 proximity switch; 251 switch bracket; 300 special-shaped metal part; 310 first workpiece body; 320 second workpiece body; 330 third workpiece body; 340 intermediate connecting portion. DETAILED DESCRIPTION

[0056] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict.

[0057] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, terms such as "upper," "lower," "left," "right," "top," and "bottom" used in this disclosure are intended solely to describe the relative positions of the components of the disclosure as shown in the accompanying drawings.

[0058] In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used herein includes any combination of one or more of the related listed items.

[0059] It should be understood that although the terms first, second, third, etc. may be used to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from each other. For example, a first element may also be referred to as a second element, and similarly, a second element may also be referred to as a first element without departing from the scope of the present disclosure.

[0060] Referring to Figures 1 to 9 , the present invention provides a five-axis additive and subtractive machining device, comprising a five-axis additive and subtractive machining machine 100 and a laser head protection device 200. The five-axis additive and subtractive machining machine 100 is equipped with a spindle 150 and a 3D printing axis 140. The spindle 150 is equipped with a tool for subtractive machining, which is used for subtractive machining of the inside and outside of a part. The 3D printing axis 140 is equipped with a laser head 141 for additive machining, which is used for additive machining of parts. During additive processing, the spindle 150 can be retracted upward independently to reduce interference with the laser head 141. During subtractive processing, the laser head 141 can be retracted upward independently to reduce interference with the spindle 150 processing. At the same time, the laser head protection device 200 protects the laser head 141 to prevent cutting fluid, debris, etc. from contaminating the laser head 141, thereby integrating additive processing and subtractive processing onto one platform, combining the five-axis linkage motion platform, laser cladding process, and high-efficiency milling process, which is conducive to solving the integrated processing needs of complex-shaped parts.

[0061] In one embodiment, referring to Figures 2 and 3 , a five-axis additive and subtractive machining center 100 employs a gantry-type structure. The bed includes a base 111 and a gantry 112. The gantry 112 is mounted on the base 111 and comprises a crossbeam and two columns. One end of each column is connected to the ends of the crossbeam, forming a U-shaped channel. The other ends of each column are connected to the base 111. A 3D printing axis 140 and a spindle 150 are mounted on the side of the crossbeam of the gantry 112 so as to be capable of synchronous horizontal movement. Specifically, the 3D printing axis 140 and the spindle 150 can move synchronously in the X-axis direction. Both the 3D printing axis 140 and the spindle 150 are mounted on the gantry 112 so as to be capable of independent vertical movement. Specifically, the 3D printing axis 140 and the spindle 150 can move independently in the Z-axis direction. The turntable 131 is movably mounted on the base 111, positioned between the two columns and beneath the crossbeam. This means that the turntable 131 is movable in the Y-axis direction. The worktable 130 is mounted on the turntable 131 and rotates with it, thereby enabling movement of the worktable 130 along the A-axis and / or the B-axis.

[0062] Specifically, when additive machining is required, the spindle 150 rises and retracts, while the 3D printing axis 140 moves up and down, coordinating with the translation of the 3D printing axis 140 on the gantry 112, the translation of the worktable 130 on the base 111, and the rotation of the turntable 131, to print parts of different shapes. When subtractive machining is required, the 3D printing axis 140 rises and retracts, while the spindle 150 moves up and down, coordinating with the translation of the 3D printing axis 140 on the gantry 112, the translation of the worktable 130 on the base 111, and the rotation of the turntable 131, to perform subtractive machining, such as cutting or milling, on the inside and outside of the printed part using a tool provided on the spindle 150. The five-axis additive and subtractive machining machine 100 of the present invention, by continuously switching between additive and subtractive machining, performs internal and / or external machining on irregularly shaped parts formed by stacking multiple layers of space, achieving the processing requirements of integrated forming, thereby facilitating the integrated machining of complex-shaped parts.

[0063] It should be noted that in some specific embodiments of the present invention, a laser melt-blown head is installed on the 3D printing shaft 140. By outputting metal powder and, under the action of a laser, printing the metal powder directly onto the workbench 130 and forming a specific shape, it is possible to produce products without initial parts. Furthermore, the metal powder can be a single metal material or a mixture of two or more metal materials, which is conducive to meeting the requirements of integrated forming when parts are composed of multiple materials stacked or mixed.

[0064] It should be noted that the five-axis additive and subtractive machining machine 100 of the embodiment of the present invention can not only be used for the integrated forming processing of parts, but also for unqualified situations that occur during the part processing process, such as excessive additive allowance or excessive subtractive cutting and other poor quality conditions, subtractive machining or additive machining can be performed directly on the unqualified position of the part to improve the processing accuracy and processing qualification rate of the part, while avoiding re-clamping and positioning, which is conducive to improving processing efficiency.

[0065] In one application embodiment, referring to FIG3 , a translation guide rail 172 (i.e., a guide rail in the X-axis direction) is arranged on the crossbeam of the gantry 112 , and two lifting guide rails 162 (i.e., a guide rail in the Z-axis direction) are both slidably arranged on the translation guide rail 172 through a translation slide 171 , wherein one of the lifting guide rails 162 is provided with a main shaft 150 to realize the rising and falling of the tool, and the other lifting guide rail 162 is provided with a three-dimensional printing axis 140 to realize the rising and falling of the laser head 141 , that is, by setting two Z axes, the main shaft 150 is moved up and down in coordination with the lifting guide rail 162 and one of the lifting slides 161, and the three-dimensional printing axis 140 is moved up and down in coordination with the lifting guide rail 162 and the other lifting slide 161, thereby realizing the separate rising and falling of the main shaft 150 and the three-dimensional printing axis 140, thereby reducing the probability of mutual interference. Telescopic rail 182 is mounted on base 111 and between the two columns of gantry 112. Turntable 131 is mounted on telescopic rail 182 (i.e., the Y-axis rail) via telescopic slide 181 and slidably positioned within the central channel. Turntable 131 is rotatably mounted on telescopic slide 181 and includes a workbench 130 for placing parts.

[0066] In one embodiment, the base 111 is provided with multiple chip removal slots, and the telescopic guide rail 182 is disposed between two chip removal slots. Here, two telescopic guide rails 182 are provided as an example, and the number of chip removal slots is set to three, one of which is disposed between the two telescopic guide rails 182, and the other two chip removal slots are disposed on the other side of the two telescopic guide rails 182.

[0067] In one embodiment, referring to Figures 1 and 3 , a laser head protection device 200 is provided on the side of the five-axis additive and subtractive machining machine 100. The laser head protection device 200 includes a mounting block 220 and a protective cover 210, with the protective cover 210 being mounted on the mounting block 220. Referring to Figures 4 and 5 , a retaining groove 212 is provided on the outer periphery of the protective cover 210, and a retaining ring 222 is provided on the mounting block 220. The retaining ring 222 has a cover inlet, and the inner wall of the retaining ring 222 is provided with a retaining flange 221. Two retaining flanges 221 are provided on opposite sides of the retaining ring 222 and on either side of the cover inlet, and the two retaining flanges 221 are symmetrically arranged. The retaining flange 221 and the retaining groove 212 are both arranged horizontally, with the cover inlet facing the laser head 141. The protective cover 210 is provided with a cavity for accommodating the laser head 141 and a cover opening with an upward opening. The outer periphery of the protective cover 210 is provided with a locking groove 212 that matches the locking ridge 221. The protective cover 210 is locked on the locking ring 222 through the locking ridge 221 and the locking groove 212, and the protective cover 210 is locked into or out of the mounting block 220 through the cover opening. A magnet 211 is provided on the upper side of the protective cover 210. Specifically, a mounting cavity is provided on the upper side of the protective cover 210, and the magnet 211 is fixed in the mounting cavity. Furthermore, the upper plane of the magnet 211 is flush with the upper plane of the protective cover 210. Furthermore, in some specific embodiments of the present invention, the number of magnets 211 is set to four, and the four magnets 211 are evenly distributed on the upper plane of the protective cover 210.

[0068] 1 and 6 , after the 3D printing shaft 140 completes additive processing, the laser head 141 moves toward the mounting block 220. Once the laser head 141 reaches above the protective cover 210, it descends and enters the cavity of the protective cover 210 through the cover inlet. Magnets 211 attract the 3D printing shaft 140, attaching the protective cover 210 to the 3D printing shaft 140. The 3D printing shaft 140 then drives the protective cover 210 to move horizontally, causing the retaining flange 221 to move along the retaining groove 211, thereby freeing the protective cover 210 from the mounting block 220. After the protective cover 210 covers the laser head 141, the spindle 150 performs subtractive processing again, thereby preventing contamination of the laser head 141. After subtractive machining is complete, if additive machining is required, the 3D printing shaft 140 drives the protective cover 210 to move horizontally, causing the protective cover 210 to snap onto the retaining ring 222, i.e., the retaining flange 221 engages the retaining groove 212. The laser head 141 then moves upward, while the protective cover 210 maintains its original height due to the retaining flange 221 and the retaining groove 212. This allows the protective cover 210 to detach from the 3D printing shaft 140, allowing the laser head 141 to be exposed for additive machining. The laser head protection device 200 of this embodiment of the present invention utilizes the magnet 211 to cooperate with the mounting block 220, enabling the protective cover 210 to be quickly installed and removed from the 3D printing shaft 140, thereby meeting the needs of frequently switching between additive and subtractive machining processes on an additive and subtractive machining machine.

[0069] In one embodiment, as shown in FIG5 , the inner wall of the mounting block 220 is provided with a ball plunger 224 that abuts the protective cover 210, thereby positioning and applying a preload force to the protective cover 210. In some specific embodiments of the present invention, there are three ball plungers 224, one of which abuts the underside of the protective cover 210, and the other two ball plungers 224 are symmetrically located on both sides of the inner wall of the mounting block 220 to abut the outer periphery of the protective cover 210.

[0070] Specifically, a base plate 223 is provided on the underside of the mounting block 220, partially covering the lower opening of the retaining ring 222. The base plate 223, retaining ring 222, and retaining flange 221 are all provided with mounting channels for mounting a ball plunger 224. A recess 213 is correspondingly provided on the outer periphery of the protective cover 210, matching the top of the ball plunger 224. The upper end of the ball plunger 224 protrudes from the inner ring of the retaining ring 222, where it fits into the recess 213 and abuts against the outer periphery of the protective cover 210, thereby applying a preload force to the protective cover 210 and positioning it. Referring to Figure 3, the upper end of the ball plunger 224 within the base plate 223 protrudes from the underside of the inner ring of the retaining ring 222, where it fits into the recess 213 on the underside of the protective cover 210 and abuts against the underside of the protective cover 210. At the same time, the mounting channel of the retaining ring 222 is connected to the mounting channel of the retaining flange 221. A ball plunger 224 is installed on both the retaining ring 222 and the retaining flange 221 on the same side. The two ball plungers 224 are symmetrically arranged and respectively embedded in the recesses 213 on both sides of the protective cover 210 and abut against the outer periphery of the protective cover 210. It should be noted that the recesses 213 are in the shape of an inward-recessed cone, with the tips of the recesses 213 facing horizontally / vertically to match the shape of the tops of the ball plungers 224.

[0071] In one embodiment, as shown in FIG4 , the protective cover 210 comprises a first cover 215 and a second cover 216, arranged sequentially from top to bottom. The first cover 215 is a ring-like structure, while the second cover 216 is a hollow, cylindrical structure. The cylindrical opening of the second cover 216 communicates with the inner ring of the first cover 215, thereby forming a cavity for accommodating the laser head 141. Furthermore, the diameter of the upper inner wall of the second cover 216 is the same as the inner ring diameter of the first cover 215, and the inner wall of the second cover 216 extends downward toward the center of the protective cover 210. The outer diameter of the cylindrical portion of the second cover 216 is less than or equal to the inner diameter of the retaining ring 222, while the outer diameter of the ring portion of the first cover 215 is greater than the inner ring diameter of the retaining ring 222. This allows the protective cover 210 to fit within the inner ring of the retaining ring 222 and be secured to the mounting block 220 with the cover opening facing upward. Furthermore, the lower side surface of the first cover body 215 is an inclined surface, and the inclined surface is inclined from top to bottom toward the center of the protective cover 210.

[0072] In one embodiment, referring to FIG1 , a locating pin 142 is provided on the underside of the 3D printing shaft 140, and a locating hole 214 is provided on the upper surface of the protective cover 210 to match the locating pin 142, thereby facilitating the positioning of the protective cover 210 during the application process. Furthermore, a cooling plate is connected to the lower surface of the 3D printing shaft 140, and a perforation is provided in the middle of the cooling plate. The laser head 141 protrudes from the cooling plate through the perforation. The locating pin 142 is provided on the lower surface of the cooling plate. When the 3D printing shaft 140 reaches above the protective cover 210, the 3D printing shaft 140 drives the cooling plate and the laser head 141 downward, and the locating pin 142 enters the locating hole 214 to locate the connection position of the protective cover 210 to the cooling plate. Furthermore, in some specific embodiments of the present invention, the number of locating pins 142 and locating holes 214 is set to two, with the two locating pins 142 symmetrically provided on the cooling plate and the two locating holes 214 symmetrically provided on the protective cover 210.

[0073] In one embodiment, referring to Figures 1 and 6 , the laser head protection device 200 is provided with a protective cover 230. The protective cover 230 includes a housing 231 and a sealing plate 233. A sidewall of the housing 231 is provided with a projection, and the sealing plate 233 can be opened and closed to cover the projection. A fixed plate 232 is disposed within the housing 231. The mounting block 220 is movably mounted on the fixed plate 232 via a cover slider and a cover guide rail, allowing the protective cover 210 to extend or retract into the housing 231. The sealing plate 233 is connected to the side of the mounting block 220 and can move with the mounting block 220, thereby connecting to and disconnecting from the housing 231 to cover or open the projection. Referring to Figure 3 , the fixed plate 232 has an L-shaped structure. The vertical plate of the fixed plate 232 is connected to the inner wall of the housing 231 away from the projection. The cover slider is mounted on the horizontal plate of the fixed plate 232, and the cover guide rail is movably mounted on the cover slider. The mounting block 220 is disposed on the cover slide rail, and the sealing plate 233 is connected to a side of the mounting block 220 facing the extension port.

[0074] In one embodiment, as shown in FIG7 , the laser protective cover includes a telescopic actuator 240, which causes the mounting block 220 to extend or retract into the housing 231. It should be noted that the telescopic actuator 240 in this embodiment of the present invention can be a telescopic cylinder, a telescopic motor, or the like. A telescopic cylinder is used as an example here. Referring to FIG3 , the telescopic cylinder is positioned horizontally and is directly connected to the fixed plate 232 via a mounting plate. The telescopic axis of the telescopic cylinder is connected to the mounting block 220 via a cylinder guide plate. Furthermore, the cylinder guide plate is L-shaped, with the horizontal plate of the cylinder guide plate connected to the bottom surface of the mounting block 220 and the vertical plate of the cylinder guide plate connected to the telescopic axis of the telescopic cylinder.

[0075] In one embodiment, referring to FIG7 , the laser head protection device 200 is provided with a proximity switch 250 for detecting the position of the mounting block 220. The proximity switch 250 is mounted on the horizontal plate of the fixed plate 232 via a switch bracket 251. The telescopic cylinder stops pushing the mounting block 220 in response to a trigger signal from the proximity switch 250. Furthermore, there are two proximity switches 250, one of which is located on the side of the fixed plate 232 away from the extension opening and is used to detect the position of the mounting block 220 when it is retracted into the housing 231. The other proximity switch 250 is located on the side of the fixed plate 232 near the extension opening and is used to detect the position of the mounting block 220 when it is extended from the housing 231.

[0076] In one embodiment, as shown in Figure 7 , a positioning plate 225 for triggering a proximity switch 250 is mounted on the mounting block 220. Positioning plate 225 is located on the side of the mounting block 220 facing away from the extension. Positioning plate 225 comprises an L-shaped connecting plate and a square trigger plate. The horizontal plate of the L-shaped connecting plate connects to the side of the mounting block 220, while the lower end of the vertical plate of the L-shaped connecting plate connects to the side of the square trigger plate. The square trigger plate is positioned horizontally and located on the side of the L-shaped connecting plate facing away from the extension. When the square trigger plate reaches above the proximity switch 250, it triggers the proximity switch 250's signal feedback.

[0077] In one embodiment, referring to FIG6 , the extension opening faces the 3D printing shaft 140 and is arranged in the direction of movement of the 3D printing shaft 140. When the 3D printing shaft 140 is performing additive printing, the protective cover 210 retracts into the housing 231, and the sealing plate 233 covers the extension opening. When the 3D printing shaft 140 completes the current additive printing, the telescopic cylinder pushes the mounting block 220 toward the extension opening. Driven by the mounting block 220, the sealing plate 233 detaches from the housing 231, and the protective cover 210 extends outside the protective cover 230. When the positioning plate 225 triggers the proximity switch 250, the telescopic drive 240 stops working, and the mounting block 220 stops moving outward. After the 3D printing axis 140 moves the laser head 141 above the protective cover 210, it moves downward, so that the protective cover 210 attracts the cooling plate and covers the laser head 141. The 3D printing axis 140 then translates away from the cover inlet, freeing the protective cover 210 from the mounting block 220. After the protective cover 210 covers the laser head 141, the spindle 150 performs subtractive machining.

[0078] When subtractive processing is completed and additive processing is required, the 3D printing shaft 140 moves toward the cover inlet, so that the locking flange 221 is embedded in the locking groove 212. When it reaches a certain position, the ball plunger 224 enters the recess 213 of the protective cover 210. The ball plunger 224 abuts the protective cover 210, and the 3D printing shaft 140 drives the laser head 141 to move upward, thereby separating the protective cover 210 from the laser head 141, and the laser head 141 is exposed to the outside for additive processing. The telescopic actuator 240 drives the mounting block 220 to retract into the box 231. When the positioning plate 225 triggers the proximity switch 250, the telescopic actuator 240 stops working, causing the mounting block 220 to stop moving. The protective cover 210 is inside the box 231, and the sealing plate 233 covers the extension opening.

[0079] In one embodiment, the extension opening is oriented perpendicular to the X-axis movement direction of the 3D printing shaft 140 and is aligned with the direction of extension and retraction of the mounting block 220. The mounting block 220 is positioned at the front or rear side of the 3D printing shaft 140, rather than in the X-axis movement direction of the 3D printing shaft 140. When subtractive machining is required, the mounting block 220 drives the protective cover 210 out of the housing 231. When the 3D printing shaft 140 moves along the Y-axis to reach above the mounting block 220, the 3D printing shaft 140 moves downward, causing the magnet 211 to adhere to the 3D printing shaft 140. The mounting block 220 then retracts into the housing 231. The protective cover 210, under the action of the magnet 211, covers the laser head 141, and the protective cover 210 does not retract with the mounting block 220. When additive processing is required, the mounting block 220 extends out of the box body 231, and the 3D printing shaft 140 drives the protective cover 210 to move along the Y-axis direction, so that the positioning flange 221 is embedded in the positioning groove 212. Then, the 3D printing shaft 140 drives the laser head 141 to move upward, and the protective cover 210 is fixed on the mounting block 220, so that the protective cover 210 is separated from the 3D printing shaft 140, the laser head 141 is exposed, and the mounting block 220 drives the protective cover 210 to retract into the box body 231.

[0080] 1 and 8 , in some embodiments, a control method for a five-axis additive and subtractive machining device according to the present invention is applied to the five-axis additive and subtractive machining device according to an embodiment of the present invention, and includes at least the following steps:

[0081] S100, obtaining an additive manufacturing instruction for the current part of the part; determining whether the current laser head 141 is covered by the protective cover 210; if so, moving the 3D printing shaft 140 so that the positioning convex edge 221 is embedded in the positioning groove 212, and then moving the 3D printing shaft 140 upward to separate the protective cover 210 from the laser head 141;

[0082] S200, by moving the 3D printing axis 140 along the X axis and / or the Z axis, moving the turntable 131 along the Y axis, and rotating the turntable 131 along the A axis and / or the B axis, the laser head 141 completes additive processing of the current portion of the part;

[0083] S300, obtaining a subtractive machining instruction for the current part of the part; determining whether the current laser head 141 is covered by the protective cover 210; if not, moving the 3D printing shaft 140 so that the laser head 141 reaches above the protective cover 210, moving the 3D printing shaft 140 downward so that the protective cover 210 covers the laser head 141 via the magnet 211, and then moving the 3D printing shaft 140 horizontally so that the protective cover 210 is separated from the mounting block 220;

[0084] S400, by moving the 3D printing axis 140 along the X axis and / or the Z axis, moving the turntable 131 along the Y axis, and rotating the turntable 131 along the A axis and / or the B axis, so that the tool of the spindle 150 completes subtractive processing of the current part;

[0085] S500 , repeating steps S100 to S400 to perform additive and subtractive processing on the next part until the processing instructions for the entire part are completed.

[0086] The five-axis additive and subtractive machining equipment of this embodiment of the present invention is equipped with a 3D printing axis 140 for additive machining and a spindle 150 for subtractive machining. This allows switching between the 3D printing axis 140 and the spindle 150 for part machining, thereby facilitating the machining of parts of various complex shapes. Furthermore, a laser head protection device 200 is provided to protect the laser head 141 during subtractive machining, thereby preventing contamination of the laser head 141 and improving machining quality. Furthermore, switching between additive and subtractive machining facilitates the spindle 150's tooling ability to process either the inside or outside of a part.

[0087] In some embodiments, the 3D printing axis 140 and the main axis 150 can be moved synchronously on the X-axis and can be moved independently on the Z-axis, so that during additive processing, the main axis 150 and the 3D printing axis 140 can be moved horizontally synchronously so that the laser head 141 reaches above the turntable 131; the tool of the main axis 150 is retracted upward, and the laser head 141 is extended downward to perform additive processing; and during subtractive processing, the main axis 150 and the 3D printing axis 140 can be moved horizontally synchronously so that the tool of the main axis 150 reaches above the turntable 131, the tool of the main axis 150 is extended downward, and the laser head 141 is retracted upward to perform subtractive processing. Such an arrangement can facilitate the switching of processing heads, make system control more convenient, and improve processing speed.

[0088] Here, a specific embodiment is used for illustration, which is not intended to limit the scope of protection of the present invention.

[0089] Referring to FIG9 , the target shaped metal part 300 to be machined and formed includes a first workpiece body 310, a second workpiece body 320, and a third workpiece body 330, all of which have inner cavities and are connected in sequence. The first workpiece body 310 and the third workpiece body 340 can be straight through bodies (e.g., straight tubes), and the second workpiece body 320 can be a curved through body (e.g., an arc-shaped tube). Furthermore, referring to FIG9 , in some specific embodiments of the present invention, the second workpiece body 320 is provided with an upper arc and a lower arc, with the middle connecting portion 340 serving as the dividing line. The orientations of the openings of the upper arc and the lower arc are inconsistent. Conventional machining methods require first completing the forming of the upper and lower arcs separately, and then machining the middle portion 340 to join the upper and lower arcs.

[0090] Therefore, using traditional single-processing methods, it is impossible to perform integrated processing of the second workpiece body 320. It is also difficult to perform subtractive finishing on the inner and outer sides of the long first and third workpiece bodies 310 and 330 (the tube length is greater than the tool length). The present invention first uses a laser beam to melt metal powder to form a moving molten pool, which then solidifies and deposits layer by layer to form a three-dimensional solid metal part. Then, a CNC milling subtractive process is used to finish the inner or outer sides of the part, thereby achieving the required part precision.

[0091] Specifically, referring to Figures 10 to 12, a small section of the workpiece with a shorter length can be formed by the laser head 141, and then the inner and outer walls of the newly formed small section of the workpiece can be fine-processed. Then, the next small section of the pipe can be formed on the above-mentioned small section of the workpiece, and this process can be repeated until the integrated processing of the entire part is completed.

[0092] Accordingly, the control method of the processing equipment according to the present invention comprises the following steps:

[0093] Step A: Initialize / position the first workpiece 310 / the second workpiece 320 / the third workpiece 330 ;

[0094] Step B: Determine whether the laser head 141 is currently covered with the protective cover 210;

[0095] If so, the cover slider is moved along the cover guide rail by the telescopic driver 240, so that the mounting block 220 extends out of the box body 231 and the sealing plate 233 is separated from the box body 231; when the feedback signal of the proximity switch 250 is received, the telescopic driver 240 is stopped; the three-dimensional printing shaft 140 is driven to move up and down and / or horizontally so that the position of the protective cover 210 matches the mounting block 220; the three-dimensional printing shaft 140 is driven to move along the translation guide rail 172 toward the mounting block 220 so that the protective cover 210 is engaged with the mounting block 220, and then the three-dimensional printing shaft 140 is driven to move upward so that the protective cover 210 is separated from the three-dimensional printing shaft 140; the cover slider is moved along the cover guide rail by the telescopic driver 240 so that the mounting block 220 and the protective cover 210 are retracted into the box body 231, and when the feedback signal of the proximity switch 250 is received, the telescopic driver 240 is stopped so that the sealing plate 233 covers the protruding opening of the box body 231;

[0096] Step C: The spindle 150 is driven to retract upward, driving the three-axis movement of the 3D printing axis 140 and coordinating the rotation of the A-axis and / or B-axis of the turntable 131 , and performing five-axis additive manufacturing on the first workpiece 310 , the second workpiece 320 , and the third workpiece 330 through the laser head 141 (see FIG. 10 );

[0097] Step D: Determine whether the additive processing instruction has been executed. If so, the cover slider is moved along the cover guide rail by the telescopic driver 240, so that the mounting block 220 extends out of the box body 231 and the sealing plate 233 is separated from the box body 231; when the feedback signal of the proximity switch 250 is received, the telescopic driver 240 is stopped; the 3D printing axis 140 is driven to move up and down and / or horizontally, so that the position of the laser head 141 matches that of the mounting block 220; the 3D printing axis 140 is driven to move along the translation guide rail 17 2 moves toward the direction close to the mounting block 220 so that the laser head 141 reaches above the protective cover 210, and then drives the 3D printing shaft 140 to move downward so that the laser head 141 extends into the protective cover 210; drives the 3D printing shaft 140 to move along the translation guide rail 172 toward the direction away from the mounting block 220, so that the protective cover 210 moves with the laser head 141 under the action of the magnet 211 and separates from the mounting block 220, so that the protective cover 210 covers the laser head 141 and moves with the 3D printing shaft 140 (see Figure 11); uses the telescopic driver 240 to move the cover slider along the cover guide rail so that the mounting block 220 is retracted into the box body 231. When a feedback signal from the proximity switch 250 is received, the telescopic driver 240 stops working so that the sealing plate 233 covers the protruding opening of the box body 231;

[0098] Step E: Driving the 3D printing axis 140 to retract upward, driving the three axes of the spindle 150 to move and coordinate with the A axis and / or B axis of the turntable 131 to rotate, and performing five-axis subtractive machining on the inner side / outer side of the first workpiece 310 / the second workpiece 320 / the third workpiece 330 by the tool (see FIG. 11 );

[0099] Step F: Determine whether the additive processing instruction has been completed. If so, repeat steps B to E until the workpiece processing instruction is completed.

[0100] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the aforementioned embodiments. As long as the technical effects of the present invention are achieved by the same means, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. Within the scope of protection of the present invention, its technical solutions and / or implementation methods may be modified and varied in various ways.

Claims

1. A five-axis additive and subtractive machining device, characterized in that: include: A five-axis additive and subtractive machining machine (100) comprises a three-dimensional printing axis (140) for additive machining, a main axis (150) for subtractive machining, and a turntable (131) for placing a workpiece, wherein the three-dimensional printing axis (140) is provided with a laser head (141); A laser head protection device (200) comprises a mounting block (220) and a protection cover (210) for covering the laser head (141); the mounting block (220) is provided with a locking convex edge (221) and a locking ring (222); the locking convex edge (221) is arranged on the inner wall of the locking ring (222); the locking ring (222) is provided with a cover inlet; the outer periphery of the protection cover (210) is provided with a locking groove (212); The protective cover (210) is connected to the mounting block (220) by means of the locking groove (212) and the locking convex edge (221); the protective cover (210) is connected to or detached from the mounting block (220) by means of the cover inlet and the three-dimensional printing shaft (140); and a magnet (211) for connecting to the three-dimensional printing shaft (140) is disposed on the upper plane of the protective cover (210).

2. The five-axis additive and subtractive machining equipment according to claim 1, characterized in that: The mounting block (220) comprises a ball plunger (224); the ball plunger (224) protrudes from the inner wall of the mounting block (220) to abut against the protective cover (210).

3. The laser head protection device according to claim 2, characterized in that: The mounting block (220) is provided with a bottom plate (223), and the bottom plate (223) partially covers the lower opening of the retaining ring (222); both sides of the mounting block (220) and the bottom plate (223) are provided with mounting channels for mounting the ball plunger (224).

4. The laser head protection device according to claim 1, characterized in that: The protective cover (210) is provided with a first cover body (215) and a second cover body (216) from top to bottom, the outer diameter of the first cover body (215) is larger than the inner diameter of the retaining ring (222), and the outer diameter of the second cover body (216) is smaller than or equal to the inner diameter of the retaining ring (222).

5. The five-axis additive and subtractive machining equipment according to claim 1, characterized in that: The laser head protection device (200) further comprises a protective cover (230), wherein the protective cover (230) comprises a box body (231) and a fixing plate (232), wherein the box body (231) is provided with a protruding opening, and the fixing plate (232) is arranged in the box body (231); the mounting block (220) is movably arranged on the fixing plate (232) so as to extend the protective cover (210) out of or retract into the box body (231) through the protruding opening.

6. The five-axis additive and subtractive machining equipment according to claim 5, characterized in that: The box body (231) comprises a sealing plate (233) for covering the extension opening, and the sealing plate (233) is arranged on a side of the mounting block (220) facing the extension opening.

7. The five-axis additive and subtractive machining equipment according to claim 5, characterized in that: The fixing plate (232) is provided with a proximity switch (250) for detecting the position of the mounting block (220); the mounting block (220) is provided with a positioning plate (225) for triggering the proximity switch (250), and the positioning plate (225) is arranged on a side of the mounting block (220) facing away from the extension port.

8. The five-axis additive and subtractive machining equipment according to claim 1, characterized in that: The five-axis additive and subtractive machining machine (100) comprises a base (111) and a gantry (112), wherein the gantry (112) is arranged on the base (111), the three-dimensional printing axis (140) and the main axis (150) are movably arranged on a crossbeam on the gantry (112), and the turntable (131) is movably arranged on the base (111) and between two columns of the gantry (112).

9. The five-axis additive and subtractive machining equipment according to claim 8, characterized in that: The three-dimensional printing axis (140) and the main axis (150) are both arranged on the gantry (112) so as to be synchronously movable horizontally via a translation slide (171).

10. The five-axis additive and subtractive machining equipment according to claim 9, characterized in that: The three-dimensional printing axis (140) and the main axis (150) are respectively arranged on the translation slide (171) through two lifting slides (161), wherein the two lifting slides (161) can move independently.

11. The five-axis additive and subtractive machining equipment according to claim 10, characterized in that: The lifting slide (161) is arranged on the translation slide (171) so as to be movable up and down via a lifting guide rail (162).

12. The five-axis additive and subtractive machining equipment according to claim 8, characterized in that: The turntable (131) is arranged on a telescopic slide (181), and the telescopic slide (181) is movably arranged on the base (111) via a telescopic guide rail (182), and the telescopic guide rail (182) is arranged between two columns of the gantry (112).

13. A control method for a five-axis additive and subtractive machining device, applied to the five-axis additive and subtractive machining device according to any one of claims 1 to 12, the method comprising the following steps: S100, obtaining an additive processing instruction for the current part of the part; determining whether the laser head (141) is currently covered with the protective cover (210); if so, moving the three-dimensional printing shaft (140) so that the positioning convex edge (221) is embedded in the positioning groove (212), and then moving the three-dimensional printing shaft (140) upward so that the protective cover (210) is separated from the laser head (141); S200, by moving the three-dimensional printing axis (140) on the X axis and / or the Z axis, moving the turntable (131) on the Y axis, and rotating the turntable (131) on the A axis and / or the B axis, the laser head (141) completes additive processing of the current part of the part; S300, obtaining the subtractive processing instruction of the current part of the part; determining whether the current laser head (141) is whether the protective cover (210) is covered; if not, moving the three-dimensional printing shaft (140) so that the laser head (141) reaches above the protective cover (210), moving the three-dimensional printing shaft (140) downward so that the protective cover (210) covers the laser head (141) through the magnet (211), and then moving the three-dimensional printing shaft (140) horizontally so that the protective cover (210) is separated from the mounting block (220); S400, by moving the three-dimensional printing axis (140) on the X axis and / or the Z axis, moving the turntable (131) on the Y axis, and rotating the turntable (131) on the A axis and / or the B axis, the tool of the spindle (150) completes the subtractive processing of the current part of the part; S500, repeating steps S100 to S400 to perform additive processing and subtractive processing of the next part until the processing instructions of the entire part are completed.

14. The method according to claim 13, characterized in that The step S200 includes the following steps: The main shaft (150) and the three-dimensional printing shaft (140) are synchronously moved horizontally so that the laser head (141) reaches above the turntable (131); the tool of the main shaft (150) is retracted upward, and the laser head (141) is extended downward to perform additive processing.

15. The method according to claim 13, characterized in that The step S400 includes the following steps: The main shaft (150) and the three-dimensional printing shaft (140) are synchronously moved horizontally so that the tool of the main shaft (150) reaches above the turntable (131); the tool of the main shaft (150) extends downward, and the laser head (141) extends upward, so as to perform subtractive processing.

16. The method according to claim 13, characterized in that In the step S400, the tool of the spindle (150) performs subtractive processing on the inner side or the outer side of the current part.

17. The method according to claim 13, characterized in that The step S200 further includes the following steps: Determine whether the additive processing instruction of the current part is completed; if so, move the three-dimensional printing axis (140) so that the protective cover (210) covers the laser head (141) through the magnet (211).

18. The method according to claim 13, characterized in that The step S500 further comprises the following steps: when the processing instruction of the entire part is completed, the three-dimensional printing axis (140) is moved so that the protective cover (210) covers the laser head (141).

19. A control method for a five-axis additive and subtractive machining device, used for machining a special-shaped metal part (300) with an inner cavity, applied to the five-axis additive and subtractive machining device according to any one of claims 1 to 12; the method comprises the following steps: Step A: initializing or locating the position of the special-shaped metal part (300); Step B: determining whether the laser head (141) is currently covered with the protective cover (210); if so, moving the three-dimensional printing shaft (140) to separate the protective cover (210) from the laser head (141); Step C: driving the main shaft (150) to retract upward, driving the three-axis movement of the three-dimensional printing shaft (140) and cooperating with the A-axis and / or B-axis rotation of the turntable (131), and performing five-axis linkage additive processing on the special-shaped metal part (300) through the laser head (141); Step D: determining whether the additive processing instruction has been executed, and if so, moving the three-dimensional printing axis (140) so that the protective cover (210) covers the laser head (141); Step E: determining whether to execute a subtractive processing instruction, and if so, driving the three-dimensional printing axis (140) to retract upward, driving the three axes of the main axis (150) to move and cooperate with the A axis and / or B axis of the turntable (131) to rotate, and performing five-axis linkage subtractive processing on the inner and outer sides of the special-shaped metal part (300) through a tool; Step F: Determine whether the additive processing instruction has been executed. If so, repeat steps B to E until the workpiece processing instruction is completed.

20. The method according to claim 19, characterized in that The special-shaped metal part (300) comprises a first workpiece body (310), a second workpiece body (320) and a third workpiece body (330) which are connected in sequence and each have an inner cavity; the first workpiece body (310) and the third workpiece body (340) are straight through bodies, and the second workpiece body (320) is a curved through body.

Images