A powder-mixing-additive-stamping composite forming device and method

Abstract

The application discloses a mixed powder-additive-stamping composite forming device, which comprises a rack and a powder laying groove arranged at the lower part of the rack. The powder laying groove is internally provided with a lifting powder bed mechanism. The rack is provided above the powder laying groove with a stamping mechanism, a light-transmitting powder blocking mechanism and a powder laying mechanism, which are all horizontally movable. The light-transmitting powder blocking mechanism is used for plugging the slot at the top of the powder laying groove to press the powder for the lifting powder bed mechanism. The lifting powder bed mechanism is provided with a forming groove matched with the stamping mechanism. The forming groove is internally provided with a forming table matched with the forming groove. The forming groove is provided below the forming table with a first lifting driving element used for driving the forming table to lift. The application also discloses a mixed powder-additive-stamping composite forming method, which comprises the steps of determining the powder laying thickness, laying the powder, pressing the powder, laser sintering and stamping forming. The mixed powder-additive-stamping composite forming device and method can improve the production efficiency, the powder laying uniformity, the product quality, reduce the powder waste and the processing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser additive manufacturing technology, in particular to a mixed powder-additive-stamping composite forming device and method. BACKGROUND

[0002] The powder forming process is generally also through laser additive manufacturing technology to stack powder layers to form a solid, and then stamping forming is performed on the solid.

[0003] Laser additive manufacturing technology is to lay powder on a powder bed, and then a laser beam melts or sinters the metal powder on the powder bed according to the track path given by the three-dimensional model, and the layers are stacked to form a solid. Laser additive manufacturing technology has the characteristics of not being limited by the structure of the part, and is one of the key technologies to solve the problem of difficult preparation of complex structure plates such as bionics and three-dimensional structures.

[0004] Stamping forming refers to the method of applying external force to plate, strip, pipe and profiled material by a press and a die to produce plastic deformation or separation, so as to obtain a workpiece (stamping part) with the required shape and size. The stamping part is light in weight, thin in thickness and good in rigidity. Its dimensional tolerance depends on the die, so the quality is stable and generally does not need to be machined again for use.

[0005] The existing laser additive manufacturing equipment has the following defects:

[0006] (1) long processing time and low production efficiency;

[0007] (2) the equipment is complex, and laser sintering and stamping forming cannot be completed at the same time on the same processing table;

[0008] (3) the actual processing area is 50-70%, and if not recycled, a large amount of unprocessed powder will be wasted;

[0009] (4) there are a large number of voids in the powder material, and after laser sintering, the forming layer will produce serious shrinkage, resulting in imperfect matching of the next layer parameters, and the final defect accumulates, the size precision of the formed part cannot meet the requirements, which seriously affects the density of the workpiece, and finally reduces the service performance and life of the workpiece;

[0010] (5) poor uniformity of powder laying, resulting in poor quality of formed workpieces;

[0011] (6) the process of preparing gradient functional material workpieces is complicated (gradient functional material is a new composite material that is composed of multiple materials and has continuous gradient change in composition and structure, which requires the function and performance to change with the position inside the component, and the overall performance of the component is optimized to meet the requirements), and multiple material processing cannot be performed at the same time. SUMMARY

[0012] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a mixed powder-additive-punching composite forming device and method which can improve production efficiency, powder laying uniformity and product quality, and reduce powder waste and processing cost.

[0013] To solve the above technical problems, the present application adopts the following technical solutions:

[0014] A mixed powder-additive-punching composite forming device, comprising a rack and a powder laying groove provided at the lower part of the rack and having an upward notch, a lifting powder bed mechanism for placing powder and being liftable is arranged in the powder laying groove, a punching mechanism, a light-transmitting powder blocking mechanism and a powder laying mechanism which are all horizontally movable are arranged above the powder laying groove, the powder laying mechanism is used for laying mixed powder on the lifting powder bed mechanism, the light-transmitting powder blocking mechanism is used for blocking the notch at the top of the powder laying groove to press the powder for the lifting powder bed mechanism, and the punching mechanism is used for punching and forming the sintered entity on the lifting powder bed mechanism, a forming groove matched with the punching mechanism is arranged on the lifting powder bed mechanism, a forming table matched with the forming groove is arranged in the forming groove, and a first lifting driving element for driving the forming table to lift is arranged below the forming table.

[0015] As a further improvement of the above technical solutions:

[0016] The lifting powder bed mechanism comprises a powder bed placed in the powder laying groove and matched with the powder laying groove, and a second lifting driving element arranged below the powder bed for driving the powder bed to lift, and the forming groove is arranged on the powder bed.

[0017] The light-transmitting powder blocking mechanism comprises a horizontal light-transmitting plate and a first horizontal driving assembly arranged on the rack for driving the light-transmitting plate to horizontally move.

[0018] The first horizontal driving assembly comprises two parallel first lead screws and first screw sleeves respectively arranged on both sides of the light-transmitting plate, the first lead screws are rotationally arranged on the rack, the first screw sleeves are respectively sleeved on the first lead screws, and a first rotation driving assembly for driving the first lead screws to synchronously rotate is arranged on the rack.

[0019] The punching mechanism comprises a translation frame arranged on the rack and a second translation driving assembly for driving the translation frame to translate, a punching die and a third lifting driving element for driving the punching die to lift are arranged on the translation frame, and a heating element is arranged on the punching die.

[0020] The second translation driving assembly comprises two parallel second lead screws and second screw sleeves respectively arranged on both sides of the translation frame, the second lead screws are rotationally arranged on the rack, the second screw sleeves are respectively sleeved on the second lead screws, and a second rotation driving assembly for driving the second lead screws to synchronously rotate is arranged on the rack.

[0021] The powder laying mechanism comprises a powder laying box and a plurality of powder falling boxes arranged in the powder laying box, the powder laying box is arranged on a rack, the rack is provided with a third translation driving assembly for driving the powder laying box to horizontally move, the bottom of the powder laying box is provided with an inclined flow guide surface, the powder laying box is provided with a powder falling port at the bottom of the flow guide surface, the powder laying box is provided with a size-adjustable powder mixing channel below the powder falling port, each powder falling box is arranged above the flow guide surface and spaced along the inclined direction of the flow guide surface, and the bottom of each powder falling box is provided with a powder discharging valve body mechanism.

[0022] The powder mixing channel has a fixed side wall fixed on the powder laying box on one side close to the flow guide surface and has a movable side wall on the other side, and the rack is provided with a spacing adjusting assembly for adjusting the distance between the fixed side wall and the movable side wall.

[0023] The third translation driving assembly comprises two parallel third lead screws and third screw sleeves arranged on the two sides of the powder laying box respectively, the third lead screws are rotationally arranged on the rack, the third screw sleeves are respectively sleeved on the third lead screws, and the rack is provided with a third rotation driving assembly for driving the third lead screws to synchronously rotate.

[0024] A powder mixing-additive-stamping composite forming method is performed by using the powder mixing-additive-stamping composite forming device, and comprises the following steps:

[0025] S1, determining the powder laying thickness: the lifting powder bed mechanism is adjusted to lift, so that the top surface of the lifting powder bed mechanism is at a predetermined height from the top surface of the powder laying groove, to determine the powder laying thickness;

[0026] S2, powder laying: the powder laying mechanism moves horizontally above the lifting powder bed mechanism, and the mixed powder is laid on the lifting powder bed mechanism;

[0027] S3, powder pressing: the light-transmitting powder blocking mechanism is translated to block the slot at the top of the powder laying groove, the lifting powder bed mechanism is lifted, and the powder thereon is compacted;

[0028] S4, laser sintering: a laser sintering device is used to emit laser above the light-transmitting powder blocking mechanism, and the laser sintering device sinter the powder on the lifting powder bed mechanism into a solid body through the light-transmitting powder blocking mechanism;

[0029] S5, stamping forming: the light-transmitting powder blocking mechanism is removed from the slot at the top of the powder laying groove; the stamping mechanism is translated to above the powder laying groove and is aligned with the forming groove; the second lifting driving member drives the forming table to descend by a predetermined distance; then, the stamping mechanism is pressed downward to form the sintered solid body corresponding to the forming groove.

[0030] Compared with the prior art, the advantages of the present application are that:

[0031] The powder-mixing, additive, and stamping composite forming device integrates powder laying, powder pressing, and stamping forming on one device, shortens processing time, and improves production efficiency; the powder is subjected to laser sintering after compaction, and the formed workpiece has high size precision and density and good quality; powder laying is performed through horizontal movement of the powder laying mechanism, and the powder laying uniformity is good and powder waste is small.

[0032] The powder-mixing, additive, and stamping composite forming method integrates powder laying, powder pressing, and stamping forming on one device, shortens processing time, and improves production efficiency; the powder is subjected to laser sintering after compaction, and the formed workpiece has high size precision and density and good quality; powder laying is performed through horizontal movement of the powder laying mechanism, and the powder laying uniformity is good and powder waste is small. The powder-mixing, additive, and stamping composite forming method can improve production efficiency, powder laying uniformity, and product quality, and can reduce powder waste and processing cost. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a perspective structural schematic view of the first perspective view of the powder-mixing, additive, and stamping composite forming device.

[0034] Figure 2 is a perspective structural schematic view of the second perspective view of the powder-mixing, additive, and stamping composite forming device.

[0035] Figure 3 is a front structural schematic view of the powder-mixing, additive, and stamping composite forming device.

[0036] Figure 4 is a main sectional structural schematic view of the powder-mixing, additive, and stamping composite forming device.

[0037] Figure 5 is an enlarged view of A in Figure 4

[0038] Figure 6 is an enlarged view of B in Figure 4

[0039] Figure 7 is an enlarged view of C in Figure 4

[0040] Figure 8 is a structural schematic view of the stamping mechanism of the powder-mixing, additive, and stamping composite forming device.

[0041] Figure 9 is a structural schematic view of the lifting powder bed mechanism of the powder-mixing, additive, and stamping composite forming device.

[0042] ​​​The reference signs in the drawings represent the following items:

[0043] 1, frame; 2, powder laying groove; 3, punching mechanism; 31, translation frame; 32, punching die; 321, punching part; 33, third lifting driving part; 34, heating part; 35, second screw rod; 36, second screw sleeve; 37, second rotary driving assembly; 4, lifting powder bed mechanism; 41, powder bed; 42, second lifting driving part; 43, forming groove; 44, forming table; 45, first lifting driving part; 5, light-transmitting powder blocking mechanism; 51, first screw sleeve; 52, light-transmitting plate; 53, first screw rod; 54, first rotary driving assembly; 6, powder laying mechanism; 61, powder laying box; 611, flow guide surface; 612, powder falling port; 613, powder mixing channel; 614, fixed side wall; 615, movable side wall; 616, interval adjusting assembly; 62, powder falling box; 63, powder discharging valve body mechanism; 64, third screw rod; 65, third screw sleeve; 66, third rotary driving assembly. DETAILED DESCRIPTION

[0044] The present application will be further described below in conjunction with the drawings and specific examples.

[0045] As shown in the present disclosure and claims, unless the context clearly indicates otherwise, the words "one", "an", "a", and / or "the" do not mean "only one", but can include a plurality or "one or more" unless the context clearly indicates otherwise. The words "first", "second", and similar words do not necessarily indicate any order, quantity, or importance, but are only used to distinguish different constituent parts. Similarly, the words "include" or "contain" and similar words mean that the elements or objects before the words encompass the elements or objects listed after the words and their equivalents, and do not exclude other elements or objects. The words "connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0046] Example One

[0047] Figures 1 to 9An embodiment of the mixed-powder-additive-stamping composite forming device is shown, which comprises a frame 1 and a powder laying groove 2 arranged at the lower part of the frame 1 and having an upward slot, and a lifting powder bed mechanism 4 arranged in the powder laying groove 2 for placing powder and capable of lifting, a stamping mechanism 3, a light-transmitting powder blocking mechanism 5 and a powder laying mechanism 6 arranged above the powder laying groove 2 and all capable of horizontal movement, the powder laying mechanism 6 is used for laying mixed powder on the lifting powder bed mechanism 4, the light-transmitting powder blocking mechanism 5 is used for blocking the slot at the top of the powder laying groove 2 for the lifting of the lifting powder bed mechanism 4, and the stamping mechanism 3 is used for stamping the sintered entity on the lifting powder bed mechanism 4, the lifting powder bed mechanism 4 is provided with a forming groove 43 matched with the stamping mechanism 3, the forming groove 43 is provided with a forming table 44 matched with the forming groove 43, and the forming groove 43 is provided with a first lifting driving part 45 below the forming table 44 for driving the lifting of the forming table 44.

[0048] The processing procedure of the mixed-powder-additive-stamping composite forming device is as follows: first, the lifting powder bed mechanism 4 is lifted and adjusted to a predetermined height from the top surface of the powder laying groove 2 to determine the powder laying thickness; second, the powder laying mechanism 6 is horizontally moved above the lifting powder bed mechanism 4 to lay mixed powder on the lifting powder bed mechanism 4; third, the light-transmitting powder blocking mechanism 5 is translated to block the slot at the top of the powder laying groove 2, and the lifting powder bed mechanism 4 is lifted to compact the powder thereon; fourth, a laser sintering device is used to emit laser above the light-transmitting powder blocking mechanism 5, and the laser passes through the light-transmitting powder blocking mechanism 5 to sinter the powder on the lifting powder bed mechanism 4 into an entity; fifth, the light-transmitting powder blocking mechanism 5 is removed from the slot at the top of the powder laying groove 2, the stamping mechanism 3 is translated above the powder laying groove 2 and aligned with the forming groove 43, the first lifting driving part 45 drives the forming table 44 to descend by a predetermined distance, and then the stamping mechanism 3 is pressed to form the corresponding part of the sintered entity in the forming groove 43. The mixed-powder-additive-stamping composite forming device integrates powder laying, powder compacting and stamping forming in one device, shortens the processing time and improves the production efficiency; the powder is sintered by laser after being compacted, and the formed workpiece has high size precision and density and good quality; the powder laying is performed by horizontal movement of the powder laying mechanism 6, and the powder laying uniformity is good and the powder waste is small. The mixed-powder-additive-stamping composite forming device has reasonable structure design, can improve the production efficiency, powder laying uniformity and product quality, and can reduce the powder waste and processing cost.

[0049] In the embodiment, as shown in Figure 5As shown, the lifting powder bed mechanism 4 comprises a powder bed 41 placed in the powder laying groove 2 and matched with the powder laying groove 2, a second lifting driving element 42 arranged below the powder bed 41 for driving the powder bed 41 to lift, and a forming groove 43 arranged on the powder bed 41. Specifically, the periphery of the powder bed 41 is in matched contact with the inner side wall of the powder laying groove 2, so as to avoid a large gap between the powder bed 41 and the inner side wall of the powder laying groove 2, and thus the powder falling down. Similarly, the periphery of the forming table 44 is in matched contact with the inner side wall of the forming groove 43, so as to avoid a large gap between the forming table 44 and the inner side wall of the forming groove 43, and thus the powder falling down. The top surface of the powder bed 41 and the top surface of the forming table 44 are both horizontal surfaces, and the opening of the forming groove 43 faces upward. The opposite surface of the light-transmitting powder blocking mechanism 5 to the powder bed 41 is also a horizontal surface. When the powder is laid, the first lifting driving element 45 makes the top surface of the forming table 44 flush with the top surface of the powder bed 41, so that the powder can be compacted flat between the powder bed 41 and the light-transmitting powder blocking mechanism 5.

[0050] As shown in the embodiment, Figure 6 the light-transmitting powder blocking mechanism 5 comprises a horizontal light-transmitting plate 52 and a first horizontal driving assembly arranged on the rack 1 for driving the light-transmitting plate 52 to move horizontally. When the powder is pressed, the first horizontal driving assembly makes the light-transmitting plate 52 translate to block the slot at the top of the powder laying groove 2. The bottom surface of the light-transmitting plate 52 is flush with the top surface of the powder laying groove 2, or is spaced apart from the top surface of the powder laying groove 2 by a proper distance. The distance is such that when the light-transmitting plate 52 blocks the slot at the top of the powder laying groove 2, the gap between the light-transmitting plate 52 and the top surface of the powder laying groove 2 cannot allow the powder to pass through. The area of the light-transmitting plate 52 is larger than the slot of the powder laying groove 2.

[0051] As shown in the embodiment, Figure 1 and Figure 3 the first horizontal driving assembly comprises two parallel first lead screws 53 and first screw sleeves 51 arranged on the two sides of the light-transmitting plate 52. The first lead screws 53 are rotationally arranged on the rack 1, and the first screw sleeves 51 are respectively sleeved on the first lead screws 53. The rack 1 is provided with a first rotation driving assembly 54 for driving the first lead screws 53 to rotate synchronously. The first screw sleeves 51 are fixedly connected with the light-transmitting plate 52 and located above the light-transmitting plate 52. The first rotation driving assembly 54 drives the first lead screws 53 to rotate synchronously, thereby driving the first screw sleeves 51 and the light-transmitting plate 52 to move horizontally. The structure is simple and the operation is convenient.

[0052] As shown in the embodiment, Figures 1 to 4 the stamping mechanism 3 comprises a translation frame 31 arranged on the rack 1 and a second translation driving assembly for driving the translation frame 31 to translate. The translation frame 31 is provided with a stamping die 32 and a third lifting driving element 33 for driving the stamping die 32 to lift. The stamping die 32 is provided with a heating element 34. The second translation driving assembly drives the translation frame 31 to translate, so that the stamping die 32 translates between the position directly above the powder laying groove 2 and the position above the side of the powder laying groove 2.

[0053] In the embodiment, the second translation driving assembly includes two parallel second lead screws 35 and second screw sleeves 36 arranged on both sides of the translation frame 31, the second lead screws 35 are rotationally arranged on the rack 1, the second screw sleeves 36 are respectively sleeved on the second lead screws 35, and the rack 1 is provided with a second rotation driving assembly 37 for driving the second lead screws 35 to synchronously rotate. The second screw sleeves 36 are fixedly connected with the translation frame 31 and located above the translation frame 31, the second rotation driving assembly 37 drives the second lead screws 35 to synchronously rotate, thereby driving the second screw sleeves 36 to horizontally move with the translation frame 31, and the structure is simple and the operation is convenient. The bottom of the stamping die 32 is provided with a lower stamping part 321, and the stamping part 321 is matched with the shape of the forming groove 43 and the forming table 44.

[0054] In the embodiment, as shown in Figure 7 The powder laying mechanism 6 includes a powder laying box 61 and a plurality of powder falling boxes 62 arranged in the powder laying box 61, the powder laying box 61 is arranged on the rack 1, the rack 1 is provided with a third translation driving assembly for driving the powder laying box 61 to horizontally move, the bottom of the powder laying box 61 is provided with an inclined flow guide surface 611, the powder laying box 61 is provided with a powder falling port 612 at the bottom of the flow guide surface 611, the powder laying box 61 is provided with a size-adjustable powder mixing channel 613 below the powder falling port 612, each powder falling box 62 is located above the flow guide surface 611 and is arranged in the inclined direction of the flow guide surface 611, and the bottom of each powder falling box 62 is provided with a powder valve body mechanism 63.

[0055] Each powder falling box 62 is used for placing different powders, each powder falls onto the flow guide surface 611 through the corresponding powder valve body mechanism 63 and rolls into the powder mixing channel 613 along the flow guide surface 611, and the powders are repeatedly collided in the powder mixing channel 613 to be mixed. During powder laying, the discharging amount of each powder valve body mechanism 63 and the horizontal moving speed of the powder laying box 61 driven by the third translation driving assembly are controlled, so that each powder can be uniformly laid on the plane composed of the top surface of the powder bed 41 and the top surface of the forming table 44 after mixing. The powder laying mechanism 6 can simultaneously place multiple powders to realize the preparation of a gradient function plate, and can realize the full mixing of multiple powders without being limited by the material density.

[0056] In the embodiment, one side of the powder mixing channel 613 close to the flow guide surface 611 is provided with a fixed side wall 614 fixed on the powder laying box 61, and the other side is provided with a movable side wall 615, and the rack 1 is provided with a spacing adjusting assembly 616 for adjusting the distance between the fixed side wall 614 and the movable side wall 615. The distance between the fixed side wall 614 and the movable side wall 615 can be adjusted to the optimal powder mixing distance by the spacing adjusting assembly 616.

[0057] In the embodiment, the third translation driving assembly includes two parallel third lead screws 64 and third nuts 65 arranged on both sides of the powder distributing box 61. The third lead screws 64 are rotationally arranged on the frame 1, and the third nuts 65 are respectively sleeved on the third lead screws 64. The frame 1 is provided with a third rotation driving assembly 66 for driving the third lead screws 64 to synchronously rotate. The third nuts 65 are fixedly connected with the powder distributing box 61, and the third rotation driving assembly 66 drives the third lead screws 64 to synchronously rotate, thereby driving the third nuts 65 and the powder distributing box 61 to horizontally move, which is simple in structure and convenient to operate.

[0058] The stamping mechanism 3, the light-transmitting powder blocking mechanism 5 and the powder distributing mechanism 6 are arranged in an up-down staggered manner to avoid motion interference. Specifically, the stamping mechanism 3 is located above the light-transmitting powder blocking mechanism 5, and the powder distributing mechanism 6 is located above the stamping mechanism 3. The lead screws are horizontally and parallelly arranged.

[0059] A vibration mechanism can be arranged on the powder distributing box 61 to prevent residual powder in the powder distributing box 61.

[0060] Embodiment two:

[0061] A powder mixing-additive-stamping composite forming method is performed by using the powder mixing-additive-stamping composite forming device of the embodiment one, and includes the following steps.

[0062] S1, determining the powder distributing thickness: the lifting powder bed mechanism 4 is adjusted to be lifted or lowered, so that the top surface of the lifting powder bed mechanism 4 is at a predetermined height from the top surface of the powder distributing groove 2, to determine the powder distributing thickness.

[0063] S2, powder distributing: the powder distributing mechanism 6 moves horizontally above the lifting powder bed mechanism 4 to evenly distribute the mixed powder on the lifting powder bed mechanism 4.

[0064] S3, powder pressing: the light-transmitting powder blocking mechanism 5 is translated to block the slot on the top of the powder distributing groove 2, and the lifting powder bed mechanism 4 is lifted to compact the powder thereon.

[0065] S4, laser sintering: a laser sintering device is used to emit laser above the light-transmitting powder blocking mechanism 5, and the laser passes through the light-transmitting powder blocking mechanism 5 to sinter the powder on the lifting powder bed mechanism 4 into a solid body.

[0066] S5, stamping forming: the light-transmitting powder blocking mechanism 5 is moved away from the slot on the top of the powder distributing groove 2; the stamping mechanism 3 is translated to be above the powder distributing groove 2 and aligned with the forming groove 43; the first lifting driving member 45 drives the forming table 44 to be lowered by a predetermined distance; then, the stamping mechanism 3 is pressed downward to form the corresponding part of the sintered solid body into the forming groove 43.

[0067] The mixed powder-additive-stamping composite forming method integrates powder laying, powder pressing and stamping forming on one device, shortens the processing time, and improves the production efficiency; the powder is sintered by laser after compaction, the formed workpiece has high size precision and density, and good quality; the powder laying is performed by horizontal movement of the powder laying mechanism 6, the powder laying uniformity is good, and the powder waste is small. The mixed powder-additive-stamping composite forming method can improve the production efficiency, powder laying uniformity and product quality, and can reduce the powder waste and processing cost.

[0068] Although the present application has been disclosed in the above preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application, or modify equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application, by using the technical contents disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical solutions of the present application, shall fall within the scope of protection of the technical solutions of the present application.

Claims

1. A powder-mixing-additive-stamping hybrid forming apparatus, characterized by: The device comprises a rack (1) and a powder laying groove (2) arranged at the lower part of the rack (1) and having an upward opening, a lifting powder bed mechanism (4) for placing powder and capable of lifting is arranged in the powder laying groove (2), a stamping mechanism (3), a light-transmitting powder blocking mechanism (5) and a powder laying mechanism (6) are arranged above the powder laying groove (2) and are capable of moving horizontally, the powder laying mechanism (6) is used for laying mixed powder on the lifting powder bed mechanism (4), the light-transmitting powder blocking mechanism (5) is used for blocking the opening at the top of the powder laying groove (2) to press the powder on the lifting powder bed mechanism (4), the stamping mechanism (3) is used for stamping the sintered entity on the lifting powder bed mechanism (4), a forming groove (43) matched with the stamping mechanism (3) is arranged on the lifting powder bed mechanism (4), a forming table (44) matched with the forming groove (43) is arranged in the forming groove (43), a first lifting driving element (45) for driving the forming table (44) to lift is arranged below the forming table (44); the lifting powder bed mechanism (4) comprises a powder bed (41) placed in the powder laying groove (2) and matched with the powder laying groove (2) and a second lifting driving element (42) arranged below the powder bed (41) for driving the powder bed (41) to lift, and the forming groove (43) is arranged on the powder bed (41); The light-transmitting powder blocking mechanism (5) comprises a horizontal light-transmitting plate (52) and a first horizontal driving assembly arranged on the rack (1) for driving the light-transmitting plate (52) to move horizontally, the powder laying mechanism (6) comprises a powder laying box (61) and a plurality of powder falling boxes (62) arranged in the powder laying box (61), the powder laying box (61) is arranged on the rack (1), a third horizontal driving assembly for driving the powder laying box (61) to move horizontally is arranged on the rack (1), an inclined flow guide surface (611) is arranged at the bottom of the powder laying box (61), a powder falling opening (612) is arranged at the bottom of the flow guide surface (611), an adjustable powder mixing channel (613) is arranged below the powder falling opening (612), each powder falling box (62) is arranged above the flow guide surface (611) and is arranged along the inclined direction of the flow guide surface (611), and a powder placing valve body mechanism (63) is arranged at the bottom of the powder falling box (62); one side of the powder mixing channel (613) close to the flow guide surface (611) has a fixed side wall (614) fixed on the powder laying box (61), and the other side has a movable side wall (615), and a spacing adjusting assembly (616) for adjusting the spacing between the fixed side wall (614) and the movable side wall (615) is arranged on the rack (1).

2. The powder-mixing-additive-stamping compound forming apparatus according to claim 1, characterized by: The first horizontal driving assembly comprises two parallel first lead screws (53) and first screw sleeves (51) arranged on both sides of the light-transmitting plate (52), the first lead screws (53) are rotatably arranged on the rack (1), the first screw sleeves (51) are respectively sleeved on the first lead screws (53), and a first rotation driving assembly (54) for driving the first lead screws (53) to synchronously rotate is arranged on the rack (1).

3. The powder-mixing-additive-stamping compound forming apparatus according to claim 1, characterized by: The stamping mechanism (3) comprises a translation frame (31) arranged on the rack (1) and a second translation driving assembly for driving the translation of the translation frame (31), the translation frame (31) is arranged with a stamping die (32) and a third lifting driving element (33) for driving the lifting of the stamping die (32), and the stamping die (32) is arranged with a heating element (34).

4. The powder-mixing-additive-stamping compound forming apparatus according to claim 3, characterized by: The second translation driving assembly comprises two parallel second lead screws (35) and second screw sleeves (36) arranged on both sides of the translation frame (31), the second lead screws (35) are rotationally arranged on the rack (1), the second screw sleeves (36) are respectively sleeved on the second lead screws (35), and the rack (1) is arranged with a second rotation driving assembly (37) for driving the synchronous rotation of the second lead screws (35).

5. The powder-mixing-additive-stamping compound forming apparatus according to any one of claims 1 to 4, characterized by: The third translation driving assembly comprises two parallel third lead screws (64) and third screw sleeves (65) arranged on both sides of the powder laying box (61), the third lead screws (64) are rotationally arranged on the rack (1), the third screw sleeves (65) are respectively sleeved on the third lead screws (64), and the rack (1) is arranged with a third rotation driving assembly (66) for driving the synchronous rotation of the third lead screws (64).

6. A powder-mixing-additive-stamping compound forming method characterized by, The powder-mixing-additive-stamping combined forming device according to any one of claims 1 to 5 is used, and the following steps are included: S1, determining the powder laying thickness: the lifting powder bed mechanism (4) is adjusted to lift, so that the top surface of the lifting powder bed mechanism (4) is at a predetermined height from the top surface of the powder laying groove (2), to determine the powder laying thickness; S2, powder laying: the powder laying mechanism (6) moves horizontally above the lifting powder bed mechanism (4) to lay the mixed powder on the lifting powder bed mechanism (4); S3, powder pressing: the light-transmitting powder blocking mechanism (5) is translated to block the slot on the top of the powder laying groove (2), and the lifting powder bed mechanism (4) is lifted to compact the powder thereon; S4, laser sintering: a laser sintering device is used to emit laser above the light-transmitting powder blocking mechanism (5), and the laser sintering device sinter the powder on the lifting powder bed mechanism (4) into a solid body through the light-transmitting powder blocking mechanism (5); S5, stamping forming: the light-transmitting powder blocking mechanism (5) is moved away from the slot on the top of the powder laying groove (2); the stamping mechanism (3) is translated above the powder laying groove (2) and aligned with the forming groove (43) in an up-down manner; the first lifting driving element (45) drives the forming table (44) to descend by a predetermined distance; then, the stamping mechanism (3) is pressed down to form the corresponding part of the sintered solid body into the forming groove (43).

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