Additive manufacturing milling and grinding head and integrally-formed batch manufacturing method thereof

Abstract

The invention provides an additive manufacturing milling and grinding head and an integrally-formed batch manufacturing method thereof, and relates to the field of semiconductor grinding and polishing tools. The milling and grinding head based on the powder bed additive manufacturing technology is prepared, the special structural design of the printing base plate is adopted, the manufacturing technology is adjusted in the manufacturing process to enable the printed milling and grinding head and the cutter handle structure to be tightly attached, and therefore the purposes of integrated forming and free of subsequent cutting and bonding fixing steps are achieved. The precision and the strength of the prepared milling and grinding head are ensured, and the preparation and machining efficiency and the quality reliability are improved. In addition, limitation of a traditional preparation method can be broken through, and the milling and grinding head which is of a complex inner and outer flow channel structure and needed by engineering is manufactured, so that the machining performance of the milling and grinding head is improved.

Description

Technical Field

[0001] This invention pertains to the interdisciplinary technology of intelligent manufacturing and semiconductor precision machining, specifically relating to semiconductor grinding and polishing tools. More specifically, it relates to an additive manufacturing milling head and its integrated molding method. The milling head, as a core tool for high-precision machining, is suitable for the efficient and precise machining of key components in intelligent equipment and semiconductor devices. Background Technology

[0002] The concept of additive manufacturing was first proposed in the late 1980s, while research in my country began in the early 1990s. In just over 20 years, this technology has developed rapidly, with broad application prospects in aerospace, micro-nano manufacturing, biomedical engineering, semiconductor precision machining, and intelligent equipment manufacturing. Additive manufacturing (AM) is a technology that manufactures solid parts by adding materials layer by layer using CAD design data. Compared to traditional material removal (machining) techniques, it is a bottom-up material accumulation manufacturing method. Its advantages lie in the rapid and free fabrication of three-dimensional structures, and it is widely used in new product development and small-batch manufacturing, especially in intelligent production line equipment requiring complex functional integration and wafer-level micro-nano device processing, where it demonstrates unique advantages. Since the late 1980s, additive manufacturing technology has gradually developed, and has also been referred to as "material-increase manufacturing," "rapid prototyping," "layered manufacturing," "solid-free form fabrication," and "3D printing." The different names each express the characteristics of this manufacturing technology from different perspectives.

[0003] Powder bed additive manufacturing (PBD) is a manufacturing method that involves depositing powder materials layer by layer and solidifying them using binders, thermal melting, or laser sintering. This technology is suitable for manufacturing complex structures from materials such as metals and ceramics, and is irreplaceable in the rapid prototyping of key components for semiconductor equipment (such as vacuum chambers and cooling channel integrations) and customized tooling systems in smart factories. Laser sintering is the most widely used PBD technology. It uses a laser beam to sinter powder particles, depositing them layer by layer to form a solid object. Its controllable microstructure meets the stringent isotropic requirements of semiconductor processing tools. Powder bed additive manufacturing offers advantages such as high manufacturing speed and large-scale manufacturing, thus finding wide application in aerospace, automotive manufacturing, and semiconductor processing.

[0004] Currently, milling heads manufactured using traditional processing methods have relatively simple structures, making it difficult to fabricate complex internal and external flow channels required for certain special working conditions, such as the precision grinding of semiconductor wafers.

[0005] Furthermore, almost all powder bed additive manufacturing technologies, including selective laser melting (SLM), have limitations in separating the printed parts from the printing substrate, requiring secondary processing for removal. Taking SLM-printed parts as an example, because SLM-type printing equipment uses a high-energy beam to melt the powder bed material, all the consumable powder adheres to the substrate, making removal difficult. Additively manufactured diamond abrasive tools are typically separated from the printing substrate via wire cutting, but the high hardness of diamond easily leads to short wires during separation. In addition, even after removing the printed abrasive body, the uneven cut surface requires subsequent grinding to smooth it before reassembling it into a finished tool. During secondary reassembly, insufficient adhesion between the tool holder and the printed abrasive body can cause adhesive to penetrate into the structure of the printed abrasive body, leading to blockages and inaccurate assembly. Therefore, diamond abrasive tools manufactured using additive manufacturing technology are costly and their application in the industry is difficult to scale up significantly.

[0006] In view of this, this application is hereby filed. Summary of the Invention

[0007] This invention provides an additive manufacturing milling head and a method for mass production of its integrated molding, aiming to improve at least one of the aforementioned technical problems. The milling head based on additive manufacturing technology provided by this invention can be designed with complex internal and external flow channel structures. Currently, milling heads prepared by traditional processing methods have relatively simple structures, making it difficult to manufacture complex internal and external flow channels required for certain special working conditions.

[0008] One of the technical solutions of the present invention is as follows: an additive manufacturing milling head, comprising a tool holder, a powder bed additively manufactured printing abrasive body, and a transition layer located between the tool holder and the printing abrasive body; the surface of the tool holder on the side connected to the printing abrasive body is a roughened surface; the thickness of the transition layer is in the range of 0.001mm-5mm, and the elemental penetration depth of the transition layer with the tool holder and the printing abrasive body reaches 10-500μm respectively.

[0009] As a further optimization, milling head types include, but are not limited to, cemented carbide milling heads, diamond abrasive milling heads, ceramic milling heads, and rubber milling heads. Powder bed additive manufacturing technologies include, but are not limited to, direct metal laser sintering (DMLS), selective laser sintering (SLS), selective laser melting (SLM), and electron beam melting (EBM). The milling head shank can be manufactured using additive manufacturing, subtractive manufacturing, or equal-material manufacturing.

[0010] The present invention also provides an integrated molding and mass production method for additive manufacturing milling heads, comprising the following steps: Step S00: Customizing the printing substrate required for additive manufacturing; the customized substrate is provided with multiple positioning slots; the inner wall of the positioning slots is provided with positioning threads, and also includes positioning screws that cooperate with the positioning slots; Multiple tool holders, customized according to the shape and purpose of the printed abrasive body, are inserted into the positioning slots from the upper surface of the customized substrate, and the positioning screws are inserted into the positioning slots from the lower surface of the customized substrate. Step S10: Surface flatness calibration of the custom substrate; including setting a flat plate, which is set above the processing surface of the custom substrate; when calibrating the flatness, the flat plate presses the processing surface of the custom substrate to make the two fit together completely, and adjusts the positioning screws to make the printing surfaces of multiple tool holders and the substrate surface on the same plane, so that the flatness of the entire processing surface meets the requirements of the powder bed additive manufacturing machine tool used. Step S20: Remove the flat plate, and calibrate and compensate for the deviation between the positioning origin of the customized substrate and the positioning point of the heat source; the calibration deviation is calibrated by reprogramming the pre-marked heat source machine vision positioning, and the pre-marked heat source image is calibrated by pixel positioning, etc.; the compensation deviation includes adjusting the substrate position compensation, adjusting the heat source position compensation, and adjusting the coordinate position of the printed milling head model in the compensation slicing software. Step S30: Transition treatment between the upper surface of the milling head holder and the printing milling head; the transition treatment includes roughening treatment of the printing surface of the holder, plating treatment of the printing surface of the holder, and transition treatment of the printing milling head material; Step S40: Print an abrasive body on the milling head substrate using powder bed additive manufacturing technology. After printing, perform surface treatment on the milling head and clean the printing chamber.

[0011] As a further optimization, step S00 also includes step S01: setting a positioning groove on the upper surface of the customized substrate, and customizing the tool holder according to the shape and application of the printing milling head; setting positioning threads and positioning screws on the lower surface. Therefore, the cross-sectional shape of the tool holder includes, but is not limited to, circles, squares, triangles, rings, etc., and is all customized. The positioning screws are used to ensure that all printing surfaces of the tool holder and the upper surface of the substrate are on the same plane as required, ensuring printing accuracy.

[0012] As a further optimization, a flattening plate is also provided, which is positioned above the processing surface of the customized substrate. During flatness calibration, the flattening plate presses against the processing surface of the customized substrate to ensure complete contact between the two. The positioning screws are adjusted so that the upper surface of the tool holder and the substrate surface are on the same plane, ensuring that the flatness of the entire processing surface meets the requirements of the powder bed additive manufacturing machine tool used. This facilitates the positioning on the same plane in step S01, providing convenience for processing.

[0013] As a further optimization, in step S20, the process needs to calibrate and compensate for the deviation between the positioning origin of the customized substrate and the positioning point of the heat source. This is because there may be a certain deviation between the origin of different substrates and the origin of the heat source of different machine tools. The calibration deviation is achieved through methods such as reprogramming calibration using machine vision positioning for heat source pre-marking and re-calibrating using pixel-level positioning of pre-marked heat source images. The compensation deviation includes adjusting the substrate position, adjusting the heat source position, and adjusting the coordinate position of the printing milling head model in the compensation slicing software. This aims to ensure accurate positioning of the printing milling head and the tool holder, thereby improving the printing yield.

[0014] As a further optimization, the transition treatment between the upper surface of the tool holder and the printed milling head includes roughening the printed surface of the tool holder, pre-setting a plating layer on the printed tool holder, and transitioning the material of the printed milling head. These three methods can also be used simultaneously or in combination. The purpose of this approach is to make the assembly and adhesion between the tool holder and the printed milling head more secure, improving the strength and integrity of the finished milling head and reducing stress concentration issues.

[0015] As a further optimization, the surface roughening treatment of the tool holder includes mechanical processing: sandblasting, brushing, polishing, etc.; heat treatment: annealing, quenching, tempering, etc.; chemical processing: pickling, acid etching, alkaline etching, electrolytic polishing, etc.; and other methods: electron beam treatment, laser treatment, plasma treatment.

[0016] As a further optimization, the tool holder is given a coating treatment, which includes coating the tool holder with a transition material layer (such as a material with the same group of elements) that has affinity with both the tool holder material and the raw material of the printing milling head, and then finishing it.

[0017] As a further optimization, the printing milling head material transition treatment involves printing with a transitional powder that has affinity with both the tool holder material and the printing raw material (such as a material with the same elements) on the surface of the tool holder printing surface, and then replacing it with the powder required for printing the milling head and printing again.

[0018] By adopting the above technical solution, the present invention can achieve the following technical effects: In current powder bed additive manufacturing processes, direct printing onto ordinary substrates results in powder material that melts at high temperatures, causing it to adhere to the substrate and become difficult to remove. Furthermore, after removal and secondary processing, the material is reassembled onto the required tool holder, but the adhesion between the tool holder and the printed milling head is insufficient, leading to inaccurate positioning. Existing technologies typically manufacture milling heads as single pieces through cutting and gluing, resulting in low efficiency and difficulty in guaranteeing strength. This invention provides a milling head based on powder bed additive manufacturing technology and its integrated mass production method. The milling head of this invention can be designed with complex internal and external flow channel structures. When using powder bed additive manufacturing technology to print the milling head, this invention eliminates the need for secondary processing and cutting to remove the printed milling head, improving the integrity, strength, and quality of the printed parts.

[0019] This invention can design milling heads with complex internal and external flow channel structures according to different working conditions, thereby improving tool performance. Based on different substrates and machine tools, appropriate methods are used to calibrate the origin deviation between the heat source and the substrate, thereby improving the connection accuracy between the printed part and the tool holder and ensuring machining precision. Different methods are selected for the transition treatment of the printed surface of the tool holder and the printed milling head according to different working conditions, thereby improving the splicing adhesion strength and ensuring the machining pass rate.

[0020] This invention can greatly improve the customization of milling heads and the performance of cutting tools. Furthermore, the one-piece batch manufacturing method of this invention can significantly improve the processing efficiency and quality reliability of tools manufactured using powder bed additive manufacturing. Multiple milling heads can be produced in a single batch. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a flowchart illustrating the present invention; Figure 2 This is a schematic diagram of the transition treatment method between the surface of the printing tool holder and the printing abrasive body of the present invention; Figure 3 This is a schematic diagram illustrating the calibration and compensation of the positioning origin of the customized substrate and the positioning point of the heat source in this invention. Figure 4 These are renderings of the printed workpiece of this invention; wherein, A is one type of customized substrate and tool holder, B is another type of customized substrate and tool holder; C is the printed part integrally formed on the tool holder in B; D is a photograph of the actual object after the milling head in C is removed from the customized substrate.

[0023] Figure 5 This is a rendering of a printed workpiece without using a one-piece molding process.

[0024] Figure 6 This invention provides a milling head model with a complex internal structure.

[0025] Figure 7 This is a schematic diagram of the additive manufacturing milling head of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] This invention provides a milling head based on powder bed additive manufacturing technology, the structure of which is as follows: Figure 7 As shown, the device includes a tool holder, a powder bed additive manufacturing printing abrasive body, and a transition layer located between the tool holder and the printing abrasive body; the surface of the tool holder on the side connected to the printing abrasive body is a roughened surface; the thickness of the transition layer ranges from 0.001mm to 5mm, and the elemental penetration depth of the transition layer with the tool holder and the printing abrasive body reaches 10-500μm respectively.

[0028] See Figure 1 The manufacturing method of the integrated milling head of the present invention includes the following steps: Step S00: Customize the printing substrate required for additive manufacturing. This customized substrate includes a tool holder 20, a substrate 10, and positioning screws 40. In this embodiment, a 304 stainless steel cylinder is used as the tool holder. The flatness of the upper and lower surfaces of the substrate 10 is less than 0.02 mm, and the parallelism is less than 0.05 mm. Multiple positioning slots 11 are provided on the substrate 10, and the tool holder 20 can be inserted into these slots. The perpendicularity of all positioning slots 11 to the upper and lower surfaces is less than 0.01 mm to ensure accurate assembly with the tool holder. In this embodiment, the tool holder 20 is inserted into the positioning slot 11 from the upper surface of the substrate 10 from top to bottom; while the positioning screws 40 are inserted into the positioning slots from the lower surface of the substrate from bottom to top.

[0029] In this invention, the cross-sectional shape of the positioning hole groove 11 is not limited and can be circular, triangular, square, etc. Furthermore, the cross-sectional area and shape of the upper and lower parts can be different; for example, it can be two stacked cylinders with a step between them.

[0030] Step S10: Surface flatness calibration of the customized substrate; in this embodiment, the flatness is 0-0.1mm, and the parallelism of the upper and lower bottom surfaces of the substrate after the tool holder is assembled is 0-0.1mm.

[0031] Step S10 is performed using a flattening plate 30, which is positioned above the processing surface of the substrate 10. During flatness calibration, the flattening plate 30 presses against the processing surface of the substrate to ensure complete contact between the two. The positioning screws 40 are adjusted to ensure the flatness of the processing surface meets the requirements of the additive manufacturing machine tool used (flatness less than 20 μm). This facilitates positioning on the same plane as in step S01, providing convenience for processing.

[0032] Step S20: The positioning origin of the customized substrate and the positioning point of the heat source are calibrated and compensated for the deviation. After laser pre-marking in the method of this invention, a camera is used to take a picture, which is then transmitted to a pre-programmed program to automatically calculate the deviation. The coordinate position of the printing milling head model in the compensation slicing software is adjusted so that the laser accurately hits the required printing position. This ensures that the printed abrasive body and the tool holder can be accurately aligned, with the coaxiality controlled between 0.01mm and 0.03mm.

[0033] Step S30: Transition treatment between the tool holder printing layer and the printing milling head; In this embodiment, a surface roughening treatment method of sandblasting and surface laser engraving is used to enable the printing milling head and tool holder to achieve a shear strength of 200Mpa-300Mpa or more.

[0034] Step S40: The abrasive body 50 is printed on the milling head substrate using powder bed additive manufacturing technology. After printing, the surface of the milling head is treated and the printing chamber is cleaned. In this embodiment, sandblasting is used to remove printing splatter impurities and for surface hardening.

[0035] The printed abrasive body has internal and external flow channel structures, including spiral, minimal surface internal structure, lattice structure, and their deformation structures. In this embodiment, the minimal surface internal structure (Diamond) is used.

[0036] Powder bed additive manufacturing methods include direct laser sintering (DMLS), selective laser sintering (SLS), selective laser melting (SLM), and electron beam melting (EBM). In this embodiment, selective laser melting (SLM) is used.

[0037] The heat source includes high-energy beams such as laser beams, electron beams, plasma beams, and ion beams. In this embodiment, a laser beam is used.

[0038] As a further optimization, in step S00: the tool holder is customized according to the shape and application of the printed abrasive body; a positioning thread is provided on the inner wall of the lower half of the positioning hole groove. The positioning screw mates with the positioning thread. The cross-sectional shape of the tool holder includes, but is not limited to, circles, squares, triangles, rings, etc., and can be customized.

[0039] Positioning screws are used to ensure that all printing surfaces of the die holder and the upper surface of the substrate are on the same plane, guaranteeing printing accuracy. In this embodiment, the positioning screws are cylinders with a flatness of less than 0.02 mm on the upper and lower surfaces and a perpendicularity of less than 0.01 mm between the cylinder circumference and the upper and lower surfaces.

[0040] As a further optimization, in step S20, the process needs to calibrate and compensate for the deviation between the positioning origin of the customized substrate and the positioning point of the heat source. This is because there may be a certain deviation between the origin of different substrates and the origin of the heat source of different machine tools. The calibration deviation is achieved through methods such as machine vision positioning and reprogramming for heat source pre-marking, and pixel-level positioning calibration using pre-marked images of the heat source. The compensation deviation includes adjusting the substrate position and also adjusting the heat source position. In this example, the calibration deviation is obtained by pre-marking with a laser beam, taking a picture with a camera, and reprogramming to obtain the deviation amount. The deviation is then compensated in the slicing software, ultimately making the deviation less than 0.001mm-0.01mm, thus achieving accurate printing of the abrasive material and accurate tool holder positioning, thereby improving the printing yield.

[0041] As a further optimization, the transition treatment between the printing substrate surface and the printed workpiece can include surface roughening of the printing substrate, pre-plating of the printing tool holder, and material transition treatment of the printed workpiece. These three methods can be used simultaneously or in combination. The purpose of this approach is to make the tool holder and the printed abrasive body more firmly bonded, improving the strength and integrity of the finished workpiece and reducing stress concentration issues.

[0042] In this embodiment, a roughening treatment is used, followed by a structural transition layer, to achieve elemental penetration of 10-500 μm between the transition layer and the substrate and the printed abrasive body. The transition layer is preferably a transition material layer with affinity for both the tool holder material and the raw material for the printed milling head, such as a material containing elements from the same group. The thickness of the transition layer ranges from 0.001 mm to 5 mm.

[0043] As a further optimization, the surface roughening treatment of the printing substrate includes methods such as machining (sandblasting, brushing, polishing, etc.), heat treatment (annealing, quenching, tempering, etc.), chemical processing (pickling, acid etching, alkaline etching, electrolytic polishing, etc.), and other methods (electron beam treatment, laser treatment, plasma treatment). This example uses sandblasting and laser grooving from the machining process.

[0044] See Figures 2 to 5 In one implementation method, from Figure 2 The image shows three processing methods for the transition surface between the tool holder printing surface and the printing abrasive body, with the aim of obtaining products with higher strength. Figure 3 For calibration compensation of the printing laser beam and the origin position of the substrate; further, according to Figure 4 and Figure 5 It is known that by using a milling head based on powder bed additive manufacturing technology and its integrated molding manufacturing method, the processing efficiency is greatly improved and the printing qualification rate reaches more than 80%.

[0045] The method of this invention solves the problems in current powder bed additive manufacturing processes, where the consumable powder on the contact surface adheres to the substrate due to the high temperature melting of the powder material, making it difficult to remove; and where the tool holder is not sufficiently bonded to the printing abrasive body and is not accurately positioned after secondary processing and reassembly.

[0046] In summary, this invention provides a milling head capable of designing complex internal and external flow channel structures, and a method for integrated molding. It offers a unique structural design for the printing substrate in powder bed additive manufacturing, and by adjusting laser parameters during manufacturing, ensures a tight fit between the printed portion and the designed structure, achieving integrated molding without subsequent cutting or bonding steps. This guarantees the precision and strength of the prepared workpiece, and improves manufacturing efficiency and quality reliability. Example 1

[0047] For example, the handle is made of 304 stainless steel, with a diameter of 8mm and a length of 23mm.

[0048] The transition layer material is Cu, and the thickness is 1 mm.

[0049] The powder material is a mixture of high-entropy alloy (FeCuGrNiAl) and diamond. The milling head has a diameter of 20 mm and a length of 10 mm.

[0050] like Figure 4 As shown in Part A, the substrate 10 has 43 positioning slots 11 and is equipped with 43 tool holders, which can produce 43 milling heads at one time.

[0051] The diamond milling head prepared by this invention has a service life of up to 200 hours when grinding BK7 optical glass. The connection strength of the milling head reaches over 200 MPa, which is more than 10 times that of the milling head connected by glue. Compared with the traditional additive manufacturing technology for preparing milling heads, the cost is reduced by more than 50%, and the efficiency is increased by more than 3 times, which can better realize large-scale production and industry promotion. Example 2

[0052] For example, the handle is made of 45 steel, with a diameter of 12mm and a length of 30mm.

[0053] The transition layer consists of a cross-shaped texture with a laser marking spacing of 200μm and a depth of 5μm on the surface of the tool holder.

[0054] The powder material is a mixture of high-entropy alloy (FeCoNiCuSn) and diamond, and the printed abrasive body has a diameter of 12mm and a length of 5mm.

[0055] like Figure 4 As shown in Part A, the substrate 10 has 43 positioning slots 11, equipped with 43 tool holders, and 43 grinding heads can be manufactured at one time.

[0056] The diamond milling head prepared by this invention has a service life of up to 100 hours when grinding zirconia ceramics. The connection strength of the milling head reaches over 150 MPa, which is more than 7 times that of the milling head connected by glue. Compared with the traditional additive manufacturing technology for preparing milling heads, the cost is reduced by more than 60%, and the efficiency is increased by more than 3 times, which can better realize large-scale production and industry promotion. Example 3

[0057] It is basically the same as Example 2, except that, as Figure 4 Part B Figure 4 Part C and Figure 4 As shown in section D, the tool holder is replaced with a shape consisting of a straight rod and a top disc. The diameter of the disc is larger than the diameter of the straight rod. Nine positioning slots 11 are provided on the substrate 10, which are equipped with nine tool holders, and nine grinding heads can be produced at one time.

[0058] like Figure 6 As shown, the method of the present invention can produce milling heads with complex internal structures.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. An additive manufacturing milling head, characterized in that, The milling head includes a tool holder, a powder bed additive manufacturing printed abrasive body, and a transition layer between the tool holder and the printed abrasive body; the surface of the tool holder on the side connected to the printed abrasive body is a roughened surface; the thickness of the transition layer ranges from 0.001mm to 5mm, and the elemental penetration depth of the transition layer to the tool holder and the printed abrasive body reaches 10-500μm respectively.

2. The additive manufacturing milling head according to claim 1, characterized in that, The printed abrasive body includes one or more of cemented carbide, diamond abrasive, CBN abrasive, and ceramic abrasive.

3. The additive manufacturing milling head according to claim 1, characterized in that, The printed abrasive body is provided with an inner and outer flow channel structure, which includes one or more of the following: spiral, minimal curved surface inner structure, and lattice structure.

4. The additive manufacturing milling head according to claim 1, characterized in that, Powder bed additive manufacturing technologies include direct metal laser sintering, selective laser sintering, selective laser melting, and electron beam melting.

5. A method for integrated molding and mass production of additive manufacturing milling heads, comprising the following steps: Step S00: Customize the printing substrate required for additive manufacturing; the customized substrate has multiple positioning slots; the inner wall of the positioning slot has positioning threads, and also includes positioning screws that mate with the positioning slots. Multiple tool holders, customized according to the shape and purpose of the printed abrasive body, are inserted into the positioning slots from the upper surface of the customized substrate, and the positioning screws are inserted into the positioning slots from the lower surface of the customized substrate. Step S10: Surface flatness calibration of the custom substrate; This includes setting a flat plate, which is positioned above the processing surface of the custom substrate; when the flatness is calibrated, the flat plate presses against the processing surface of the custom substrate to make the two fit together completely, and the positioning screws are adjusted so that the printing surfaces of multiple tool holders are on the same plane as the substrate surface, so that the flatness of the entire processing surface meets the requirements of the powder bed additive manufacturing machine tool used. Step S20: Remove the flat plate, and calibrate and compensate for the deviation between the positioning origin of the customized substrate and the positioning point of the heat source; the calibration deviation is achieved by methods including reprogramming calibration of the heat source pre-marking machine vision positioning and re-calibrating the heat source pre-marking image using pixel positioning. The compensation deviation includes adjusting the substrate position compensation, adjusting the heat source position compensation, and adjusting the coordinate position of the printed milling head model in the compensation slicing software; Step S30: Transition treatment between the upper surface of the milling head holder and the printing milling head; the transition treatment includes one or more combinations of roughening treatment of the printing surface of the holder, plating treatment of the printing surface of the holder, and transition treatment of the printing milling head material. Step S40: Print an abrasive body on the milling head substrate using powder bed additive manufacturing technology. After printing, perform surface treatment on the milling head and clean the printing chamber.

6. The integrated molding and mass production method for additive manufacturing milling heads according to claim 5, characterized in that... The heat source includes at least one of laser beam, electron beam, plasma, and ion beam.

7. The integrated molding and mass production method for additive manufacturing milling heads according to claim 5, characterized in that... In step S30, the roughness of the printing surface of the tool holder is ≥2μm, which is an irregular rough surface or a rough surface with microstructure. The processing method includes at least one of machining, heat treatment, chemical processing, electron beam treatment, laser treatment and plasma treatment.

8. The integrated molding and mass production method for additive manufacturing milling heads according to claim 5, characterized in that... In step S30, the transition treatment between the upper surface of the tool holder and the printing milling head is to coat a transition coating with a thickness of ≥5μm on the printing surface of the tool holder, and then print the abrasive body on this basis. The transition coating has affinity characteristics with both the tool holder material and the printing abrasive body.

9. A method for integrated molding and mass production of additive manufacturing milling heads according to claim 5, characterized in that... In step S30, the transition treatment of the milling head material involves first printing a transition printing layer with a thickness of 0.001mm-5mm on the printing surface of the tool holder, and then printing the abrasive body on this basis. The transition printing layer has affinity characteristics with both the tool holder material and the printed abrasive body.

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