3D printing powder supply amount calculation method and device, equipment, medium and product

Abstract

The invention discloses a 3D printing powder supply amount calculation method and device, equipment, a medium and a product, and the 3D printing powder supply amount calculation method comprises the steps that the forming breadth of a current forming layer where a to-be-printed workpiece is located is obtained; the to-be-formed thickness of the current forming layer is obtained; a first powder supply amount is obtained according to the forming breadth and the to-be-formed thickness; obtaining a to-be-printed area of a current forming layer where the to-be-printed workpiece is located; the sintering shrinkage coefficient of the current forming layer is obtained; a second powder supply amount is obtained according to the area of the to-be-printed area, the to-be-formed thickness and the sintering shrinkage coefficient; and the total powder supply amount of the current forming layer is obtained according to the first powder supply amount and the second powder supply amount. By accurately obtaining the powder supply amount of the to-be-printed workpiece, the printing effect of the to-be-printed workpiece is guaranteed, and meanwhile the powder utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of metal 3D printing, and in particular to a 3D printing powder supply amount calculation method, device, equipment, medium and product. Background Art

[0002] 3D printing technology is gradually being applied to the manufacture of actual products, among which 3D printing technology for metal materials is developing particularly rapidly. In the field of national defense, developed countries in Europe and the United States attach great importance to the development of metal 3D printing technology and have invested heavily in research, and 3D printing of metal parts has always been the focus of research and application. Not only can it print molds and bicycles, but it can also print unprecedented new weapons, and even large equipment such as cars and airplanes. As a new type of intelligent manufacturing technology, metal 3D printing has shown a very broad application prospect, and has shown a strong development momentum in more fields such as equipment design and manufacturing, equipment support, and aerospace.

[0003] However, since metal 3D printing technology adopts the working principle of layer-by-layer sintering and layer-by-layer stacking, the sintering area is different when each layer is printed, and the shrinkage volume of the sintering areas at different heights is also different. The actual powder supply of each layer and the actual powder supply of the same layer at different positions are also different. It is impossible to accurately calculate the actual powder supply of each layer in each area, resulting in excessive powder spreading and powder waste, or too little powder spreading, resulting in part printing failure. Therefore, how to improve the accurate estimation of powder supply has become a technical problem that urgently needs to be solved. Summary of the invention

[0004] The present invention provides a 3D printing powder supply calculation method, device, equipment, medium and product to improve the accuracy of powder supply and powder utilization during printing.

[0005] According to one aspect of the present invention, a method for calculating the amount of powder supplied for 3D printing is provided, which is applied to a printing device, wherein the printing device comprises a powder spreading unit and a molding unit, wherein the molding unit comprises a molding cylinder and a laser emitting subunit, wherein the molding cylinder is used to contain powder for forming a workpiece to be printed, and the laser emitting subunit is used to irradiate the powder to form the workpiece to be printed, comprising:

[0006] Obtain the forming width of the current forming layer where the workpiece to be printed is located;

[0007] Get the thickness of the current forming layer to be formed;

[0008] Obtaining a first powder supply amount according to the forming width and the thickness to be formed;

[0009] Obtaining the area of ​​the to-be-printed region of the current forming layer where the to-be-printed workpiece is located;

[0010] Get the sintering shrinkage coefficient of the current molding layer;

[0011] Obtaining a second powder supply amount according to the area of ​​the to-be-printed region, the to-be-molded thickness, and the sintering shrinkage coefficient;

[0012] The total powder supply amount of the current forming layer is obtained according to the first powder supply amount and the second powder supply amount.

[0013] Optionally, before obtaining the forming width of the current forming layer where the workpiece to be printed is located, the method further includes:

[0014] Get the total thickness and molding times of the workpiece to be printed;

[0015] The thickness to be formed of each forming layer in the workpiece to be printed is obtained according to the total thickness and the number of forming times.

[0016] Optionally, obtaining a first powder supply amount according to the forming width and the thickness to be formed includes:

[0017] Acquire a first powder spreading width and a first powder spreading length according to the forming width;

[0018] The first powder supply amount is obtained according to the first powder spreading width, the first powder spreading length and the thickness to be formed.

[0019] Optionally, obtaining the area of ​​a to-be-printed region of the current forming layer where the to-be-printed workpiece is located includes:

[0020] Get the powder spreading width of the powder spreading unit;

[0021] Obtaining the to-be-printed length of the current forming layer where the to-be-printed workpiece is located;

[0022] The area of ​​the to-be-printed region of the current forming layer where the to-be-printed workpiece is located is obtained according to the powder spreading width and the to-be-printed length.

[0023] Optionally, the powder spreading width is the same as the first powder spreading width of the forming surface.

[0024] Optionally, obtaining a total powder supply amount of a current forming layer according to the first powder supply amount and the second powder supply amount includes:

[0025] The total powder supply of the current forming layer is obtained by summing up the first powder supply and the second powder supply.

[0026] According to another aspect of the present invention, a 3D printing powder supply amount calculation device is provided, which is applied to a printing device, wherein the printing device includes a powder spreading unit and a molding unit, wherein the molding unit includes a molding cylinder and a laser emitting subunit, wherein the molding cylinder is used to contain powder for forming a workpiece to be printed, and the laser emitting subunit is used to irradiate the powder to form the workpiece to be printed, and the 3D printing powder supply amount calculation device includes:

[0027] A forming format acquisition module is used to acquire the forming format of the current forming layer where the workpiece to be printed is located;

[0028] A module for obtaining thickness to be formed, used for obtaining the thickness to be formed of the current forming layer;

[0029] A first powder supply amount acquisition module, used for acquiring a first powder supply amount according to the forming width and the thickness to be formed;

[0030] A module for obtaining the area of ​​a region to be printed, used for obtaining the area of ​​a region to be printed on the current forming layer where the workpiece to be printed is located;

[0031] A sintering shrinkage coefficient acquisition module is used to obtain the sintering shrinkage coefficient of the current molding layer;

[0032] A second powder supply amount acquisition module, used for acquiring a second powder supply amount according to the area of ​​the to-be-printed region, the to-be-molded thickness and the sintering shrinkage coefficient;

[0033] A total powder supply amount acquisition module is used to acquire the total powder supply amount of the current forming layer according to the first powder supply amount and the second powder supply amount.

[0034] According to another aspect of the present invention, a printing device is provided, the printing device comprising a powder spreading unit, a molding unit and a control unit; the molding unit comprises a molding cylinder and a laser emitting subunit, the molding cylinder is used to contain powder forming a workpiece to be printed, and the laser emitting subunit is used to irradiate the powder to form the workpiece to be printed;

[0035] The control unit is used to execute the 3D printing powder supply calculation method described in any one of the above aspects.

[0036] According to another aspect of the present invention, a computer program product is provided, the computer program product comprising a computer program, and when the computer program is executed by a processor, the computer program implements the method for calculating the powder supply amount for 3D printing according to any one of the above aspects.

[0037] The technical solution of the embodiment of the present invention provides a method for calculating the powder supply for 3D printing, which includes: obtaining the molding width of the current molding layer where the workpiece to be printed is located; obtaining the thickness to be molded of the current molding layer; obtaining the first powder supply according to the molding width and the thickness to be molded; obtaining the area of ​​the to-be-printed region of the current molding layer where the workpiece to be printed is located; obtaining the sintering shrinkage coefficient of the current molding layer; obtaining the second powder supply according to the area of ​​the to-be-printed region, the thickness to be molded and the sintering shrinkage coefficient; obtaining the total powder supply of the current molding layer according to the first powder supply and the second powder supply. By accurately obtaining the powder supply for forming the workpiece to be printed, the printing effect of the workpiece to be printed is guaranteed, and the powder utilization rate is improved at the same time.

[0038] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A schematic diagram of the structure of a printing device provided by an embodiment of the present invention;

[0041] Figure 2 A schematic diagram of a top view of a printing device provided by an embodiment of the present invention;

[0042] Figure 3 A flow chart of a method for calculating powder supply for 3D printing provided in an embodiment of the present invention;

[0043] Figure 4 A flowchart of another method for calculating the powder supply amount for 3D printing provided by an embodiment of the present invention;

[0044] Figure 5 A flowchart of another method for calculating the powder supply amount for 3D printing provided by an embodiment of the present invention;

[0045] Figure 6 A flowchart of another method for calculating the powder supply amount for 3D printing provided by an embodiment of the present invention;

[0046] Figure 7 A flowchart of another method for calculating the powder supply amount for 3D printing provided by an embodiment of the present invention;

[0047] Figure 8A schematic diagram of the structure of a 3D printing powder supply calculation device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] An embodiment of the present invention provides a method for calculating powder supply for 3D printing. This embodiment can be applicable to the calculation of powder supply for 3D printing. The method can be executed by a 3D printing powder supply calculation device. The 3D printing powder supply calculation device can be implemented in the form of hardware and / or software. The 3D printing powder supply calculation device can be configured in the control unit of the printing device.

[0051] Figure 1 A schematic diagram of the structure of a printing device provided by an embodiment of the present invention, Figure 2 A schematic diagram of the top structure of a printing device provided in an embodiment of the present invention, the printing device also includes a powder spreading unit 101 and a molding unit 102, the molding unit 102 includes a molding cylinder 1021 and a laser emitting subunit 1022, the molding cylinder 1021 is used to contain powder that forms a workpiece to be printed, and the laser emitting subunit 1022 is used to irradiate the powder to form the workpiece to be printed.

[0052] Based on the above printing device, Figure 3 A flow chart of a method for calculating the powder supply amount for 3D printing provided by an embodiment of the present invention, such as Figure 3 As shown, the method includes:

[0053] S101, obtaining the forming width of the current forming layer where the workpiece to be printed is located.

[0054] Among them, a workpiece to be printed is formed in a forming cylinder, and powder forming the workpiece to be printed is contained in the forming cylinder. Obtaining the forming width of the current forming layer where the workpiece to be printed is located can be understood as obtaining the maximum length and maximum width of the current forming cylinder that can accommodate the entire layer of powder.

[0055] S102, obtaining the thickness of the current forming layer to be formed.

[0056] During the printing process of the workpiece to be printed, it is necessary to split it into multiple layers and print it layer by layer to finally obtain the finished product. For each layer in the printing process, a forming layer needs to be laid. The current imaging layer is used to prepare a layer in the workpiece to be printed. The thickness of the current forming layer needs to be laid according to the required thickness of the workpiece to be printed to ensure the successful printing of the workpiece to be printed.

[0057] S103, obtaining a first powder supply amount according to the forming width and the thickness to be formed.

[0058] The required powder volume of the current molding layer, that is, the first powder supply amount, can be obtained by performing a multiplication operation according to the molding width of the current molding layer and the thickness to be molded of the current molding layer.

[0059] S104, obtaining the area of ​​the to-be-printed region of the current forming layer where the to-be-printed workpiece is located.

[0060] Among them, since only a part of the entire molding area is used for laser emission sub-unit irradiation of powder, it is necessary to base it on the area of ​​the to-be-printed area of ​​the current molding layer where the workpiece to be printed is located. When the to-be-printed areas of each molding layer in the workpiece to be printed are the same, the corresponding areas of the to-be-printed areas are the same; when there are different to-be-printed areas of some molding layers in the printed workpiece, the corresponding areas of the to-be-printed areas are different.

[0061] S105, obtaining the sintering shrinkage coefficient of the current molding layer.

[0062] The sintering shrinkage coefficient is related to the powder material, and the sintering shrinkage coefficient of the powder can be obtained according to different powder materials, which is not specifically limited in the embodiment of the present invention. The same workpiece to be printed usually uses the same powder during the printing process, and the corresponding sintering shrinkage coefficient is the same value.

[0063] S106, obtaining a second powder supply amount according to the area of ​​the area to be printed, the thickness to be formed and the sintering shrinkage coefficient.

[0064] Among them, the second powder supply can be obtained by multiplying the area of ​​the to-be-printed region of the workpiece to be printed in the current molding layer, the to-be-molded thickness and the sintering shrinkage coefficient, thereby ensuring that the powder supply is sufficient during the production process of the workpiece to be printed in the current molding layer, thereby avoiding insufficient powder supply and resulting in printing failure.

[0065] S107, obtaining the total powder supply of the current forming layer according to the first powder supply and the second powder supply.

[0066] Among them, the first powder supply and the second powder supply are superimposed to obtain the total powder supply of the current molding layer. When printing the first layer of the workpiece to be printed, the total powder supply of the first molding layer is calculated, and the powder laying unit is used to lay the entire layer in the molding cylinder. The laser is used to irradiate the powder in the to-be-printed area to form the first layer of the workpiece to be printed. Then, when printing the second layer of the workpiece to be printed, the total powder supply of the second molding layer is calculated. When forming the first layer of the workpiece to be printed, the powder in the to-be-printed area is consumed in the molding process due to the sintering shrinkage ratio, and a concave area is formed. During the laying process of the second molding layer, part of the powder supply will fill the concave area. Therefore, the second powder supply in the total powder supply of the second molding layer can meet the printing of the second layer of the workpiece to be printed. Similarly, the subsequent workpieces to be printed are printed in sequence. By reasonably calculating the total powder supply of each molding layer, the printing effect of the workpiece to be printed is guaranteed, and at the same time, excessive powder supply is avoided to affect the difficulty of powder recovery.

[0067] The embodiment of the present invention obtains the molding width of the current molding layer where the workpiece to be printed is located; obtains the thickness to be molded of the current molding layer; obtains the first powder supply according to the molding width and the thickness to be molded; obtains the area of ​​the to-be-printed region of the current molding layer where the workpiece to be printed is located; obtains the sintering shrinkage coefficient of the current molding layer; obtains the second powder supply according to the area of ​​the to-be-printed region, the thickness to be molded and the sintering shrinkage coefficient; obtains the total powder supply of the current molding layer according to the first powder supply and the second powder supply. By accurately obtaining the powder supply for forming the workpiece to be printed, the printing effect of the workpiece to be printed is guaranteed, and the powder utilization rate is improved at the same time.

[0068] Figure 4 A flowchart of another method for calculating the amount of powder supplied for 3D printing provided by an embodiment of the present invention is shown in FIG. Figure 4 As shown, the method includes:

[0069] S201, obtaining the total thickness and molding times of the workpiece to be printed.

[0070] Among them, the size of the workpiece to be printed needs to be obtained in advance. The size of the workpiece to be printed may include the total thickness of the workpiece to be printed. According to the total thickness of the workpiece to be printed and combined with the printing parameters of the printing device, the number of molding times of the workpiece to be printed is correspondingly obtained.

[0071] S202, obtaining the thickness of each formed layer in the workpiece to be printed according to the total thickness and the number of forming times.

[0072] Among them, the thickness of each molding layer in the workpiece to be printed is obtained according to the total thickness of the workpiece to be printed and the number of molding times. For example, the total thickness of the workpiece to be printed can be evenly divided, and the thickness of each molding layer to be printed is also the same, which can avoid calculating the first powder supply of each molding layer, ensuring that the first powder supply of each molding layer is the same, and only the second powder supply of each molding layer needs to be calculated, reducing the difficulty of calculation. According to actual design requirements, the thickness of each molding layer to be printed is different, and the first powder supply and the second powder supply of each molding layer are calculated to ensure the printing effect of the workpiece to be printed.

[0073] S203, obtaining the forming width of the current forming layer where the workpiece to be printed is located.

[0074] S204, obtaining the thickness of the current forming layer to be formed.

[0075] S205, obtaining a first powder supply amount according to the forming width and the thickness to be formed.

[0076] S206, obtaining the area of ​​the to-be-printed region of the current forming layer where the to-be-printed workpiece is located.

[0077] S207, obtaining the sintering shrinkage coefficient of the current molding layer.

[0078] S208, obtaining a second powder supply amount according to the area of ​​the area to be printed, the thickness to be formed and the sintering shrinkage coefficient.

[0079] S209: Obtain the total powder supply of the current forming layer according to the first powder supply and the second powder supply.

[0080] The embodiment of the present invention obtains the total thickness and molding times of the workpiece to be printed; obtains the thickness to be formed of each forming layer in the workpiece to be printed according to the total thickness and molding times; obtains the molding width of the current forming layer where the workpiece to be printed is located; obtains the thickness to be formed of the current forming layer; obtains the first powder supply according to the molding width and the thickness to be formed; obtains the area of ​​the to-be-printed region of the current forming layer where the workpiece to be printed is located; obtains the sintering shrinkage coefficient of the current forming layer; obtains the second powder supply according to the area of ​​the to-be-printed region, the thickness to be formed and the sintering shrinkage coefficient; obtains the total powder supply of the current forming layer according to the first powder supply and the second powder supply. By accurately determining the thickness to be formed of each forming layer, the powder supply to form the workpiece to be printed is obtained, thereby ensuring the printing effect of the workpiece to be printed and improving the powder utilization rate.

[0081] Figure 5 A flowchart of another method for calculating the amount of powder supplied for 3D printing provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, the method includes:

[0082] S301, obtaining the total thickness and molding times of the workpiece to be printed.

[0083] S302, obtaining the thickness to be formed of each forming layer in the workpiece to be printed according to the total thickness and the number of forming times.

[0084] S303, obtaining the forming width of the current forming layer where the workpiece to be printed is located.

[0085] S304, obtaining the thickness of the current forming layer to be formed.

[0086] S305: Obtain the first powder spreading width and the first powder spreading length according to the forming width.

[0087] S306, obtaining the first powder supply amount according to the first powder spreading width, the first powder spreading length and the thickness to be formed.

[0088] Among them, Figure 2 As shown, the molding width of the current molding layer where the workpiece to be printed is located corresponds to the size of the current molding cylinder. The first powder laying width W1 and the first powder laying length W2 can be obtained according to the size of the molding cylinder. The powder laying width W3 of the powder laying unit is equal to the first powder laying width W1. The moving distance of the powder laying unit is controlled to meet the first powder laying length W2, and then combined with the thickness of the current molding layer, the first powder supply amount of the current molding layer is obtained, thereby ensuring the subsequent laying of the current molding layer to meet the printing effect of the workpiece to be printed.

[0089] S307, obtaining the area of ​​the to-be-printed region of the current forming layer where the to-be-printed workpiece is located.

[0090] S308, obtaining the sintering shrinkage coefficient of the current molding layer.

[0091] S309, obtaining a second powder supply amount according to the area of ​​the area to be printed, the thickness to be formed and the sintering shrinkage coefficient.

[0092] S310, obtaining the total powder supply of the current forming layer according to the first powder supply and the second powder supply.

[0093] The embodiment of the present invention obtains the molding width of the current molding layer where the workpiece to be printed is located; obtains the thickness to be molded of the current molding layer; obtains the first powder spreading width and the first powder spreading length according to the molding width; obtains the first powder supply according to the first powder spreading width, the first powder spreading length and the thickness to be molded; obtains the area of ​​the to-be-printed region of the current molding layer where the workpiece to be printed is located; obtains the sintering shrinkage coefficient of the current molding layer; obtains the second powder supply according to the area of ​​the to-be-printed region, the thickness to be molded and the sintering shrinkage coefficient; obtains the total powder supply of the current molding layer according to the first powder supply and the second powder supply. By obtaining the powder supply for forming the workpiece to be printed, the printing effect of the workpiece to be printed is guaranteed, and the powder utilization rate is improved at the same time.

[0094] Figure 6 A flowchart of another method for calculating the amount of powder supplied for 3D printing provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, the method includes:

[0095] S401, obtaining the total thickness and molding times of the workpiece to be printed.

[0096] S402, obtaining the thickness of each formed layer in the workpiece to be printed according to the total thickness and the number of forming times.

[0097] S403, obtaining the forming width of the current forming layer where the workpiece to be printed is located.

[0098] S404, obtaining the thickness of the current forming layer to be formed.

[0099] S405: Obtain a first powder spreading width and a first powder spreading length according to the forming width.

[0100] S406, obtaining the first powder supply amount according to the first powder spreading width, the first powder spreading length and the thickness to be formed.

[0101] S407, obtaining the powder spreading width of the powder spreading unit.

[0102] Among them, Figure 2 As shown, optionally, the powder spreading width is the same as the first powder spreading width of the molding format. By adjusting the powder spreading width W3 of the powder spreading unit to be equal to the first powder spreading width W1, it is ensured that the powder can fall completely into the molding cylinder during the powder spreading process to avoid powder waste, while satisfying the first powder spreading width of the molding format to ensure the printing effect of the subsequent workpiece to be printed.

[0103] S408, obtaining the to-be-printed length of the current forming layer where the to-be-printed workpiece is located.

[0104] Among them, since the shape of each layer of the workpiece to be printed may be different, it is necessary to obtain the to-be-printed length W4 of the workpiece to be printed in each molding layer. Since the powder laying width W1 is a fixed value, it is combined with the to-be-printed length W4 to obtain the area of ​​the to-be-printed area in the current molding layer where the workpiece to be printed is located, so as to facilitate the subsequent acquisition of the second powder supply amount.

[0105] S409, obtaining the area of ​​the to-be-printed region of the current forming layer where the to-be-printed workpiece is located according to the powder spreading width and the to-be-printed length.

[0106] Among them, the area of ​​the to-be-printed area can be obtained according to the powder spreading width W3 of the powder spreading unit and the to-be-printed length W4 of the current forming layer where the workpiece to be printed is located. At the same time, the second powder supply amount is obtained in accordance with the sintering shrinkage coefficient, so that the powder supply amount of the workpiece to be printed in the current forming layer can meet the printing requirements, thereby ensuring the printing effect of the workpiece to be printed.

[0107] S410, obtaining the sintering shrinkage coefficient of the current molding layer.

[0108] S411, obtaining a second powder supply amount according to the area of ​​the area to be printed, the thickness to be formed and the sintering shrinkage coefficient.

[0109] S412, obtaining the total powder supply of the current forming layer according to the first powder supply and the second powder supply.

[0110] The embodiment of the present invention obtains the molding width of the current molding layer where the workpiece to be printed is located; obtains the thickness to be molded of the current molding layer; obtains the first powder spreading width and the first powder spreading length according to the molding width; obtains the first powder supply according to the first powder spreading width, the first powder spreading length and the thickness to be molded; obtains the powder spreading width of the powder spreading unit; obtains the length to be printed of the current molding layer where the workpiece to be printed is located; obtains the area of ​​the current molding layer where the workpiece to be printed is located according to the powder spreading width and the length to be printed; obtains the sintering shrinkage coefficient of the current molding layer; obtains the second powder supply according to the area of ​​the area to be printed, the thickness to be molded and the sintering shrinkage coefficient; obtains the total powder supply of the current molding layer according to the first powder supply and the second powder supply. By obtaining the powder supply for forming the workpiece to be printed, the printing effect of the workpiece to be printed is guaranteed, and the powder utilization rate is improved at the same time.

[0111] Figure 7 A flowchart of another method for calculating the amount of powder supplied for 3D printing provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, the method includes:

[0112] S501, obtaining the total thickness and molding times of the workpiece to be printed.

[0113] S502, obtaining the thickness of each formed layer in the workpiece to be printed according to the total thickness and the number of forming times.

[0114] S503, obtaining the forming width of the current forming layer where the workpiece to be printed is located.

[0115] S504, obtaining the thickness of the current forming layer to be formed.

[0116] S505: Obtain a first powder spreading width and a first powder spreading length according to the forming width.

[0117] S506, obtaining the first powder supply amount according to the first powder spreading width, the first powder spreading length and the thickness to be formed.

[0118] S507, obtaining the powder spreading width of the powder spreading unit.

[0119] S508, obtaining the to-be-printed length of the current forming layer where the to-be-printed workpiece is located.

[0120] S509, obtaining the area of ​​the to-be-printed region of the current forming layer where the to-be-printed workpiece is located according to the powder spreading width and the to-be-printed length.

[0121] S510, obtaining the sintering shrinkage coefficient of the current molding layer.

[0122] S511, obtaining a second powder supply amount according to the area of ​​the area to be printed, the thickness to be formed and the sintering shrinkage coefficient.

[0123] S512, obtaining the total powder supply of the current forming layer by summing up the first powder supply and the second powder supply.

[0124] Among them, the first powder supply and the second powder supply are superimposed to obtain the total powder supply of the current molding layer, so that the total powder supply is laid in the molding cylinder in the powder laying unit to ensure that the part of the workpiece to be printed is formed in the current molding layer, ensure the accuracy of the powder supply, and avoid powder waste, thereby improving the powder utilization rate during the printing process.

[0125] The embodiment of the present invention obtains the molding width of the current molding layer where the workpiece to be printed is located; obtains the thickness to be molded of the current molding layer; obtains the first powder spreading width and the first powder spreading length according to the molding width; obtains the first powder supply according to the first powder spreading width, the first powder spreading length and the thickness to be molded; obtains the powder spreading width of the powder spreading unit; obtains the length to be printed of the current molding layer where the workpiece to be printed is located; obtains the area of ​​the current molding layer where the workpiece to be printed is located according to the powder spreading width and the length to be printed; obtains the sintering shrinkage coefficient of the current molding layer; obtains the second powder supply according to the area of ​​the area to be printed, the thickness to be molded and the sintering shrinkage coefficient; and obtains the total powder supply of the current molding layer by summing the first powder supply and the second powder supply. By obtaining the powder supply for forming the workpiece to be printed, the printing effect of the workpiece to be printed is guaranteed, and the powder utilization rate is improved at the same time.

[0126] Figure 8A schematic diagram of a 3D printing powder supply calculation device provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, it is applied to a printing device, the printing device includes a powder spreading unit and a molding unit, the molding unit includes a molding cylinder and a laser emitting subunit, the molding cylinder is used to contain powder to form a workpiece to be printed, and the laser emitting subunit is used to irradiate the powder to form the workpiece to be printed. The 3D printing powder supply amount calculation device includes:

[0127] A forming format acquisition module 201 is used to acquire the forming format of the current forming layer where the workpiece to be printed is located;

[0128] The module 202 for obtaining the thickness to be formed is used to obtain the thickness to be formed of the current forming layer;

[0129] A first powder supply amount acquisition module 203, used to acquire a first powder supply amount according to a forming width and a thickness to be formed;

[0130] The area acquisition module 204 of the area to be printed is used to acquire the area of ​​the area to be printed of the current forming layer where the workpiece to be printed is located;

[0131] The sintering shrinkage coefficient acquisition module 205 is used to acquire the sintering shrinkage coefficient of the current molding layer;

[0132] A second powder supply amount acquisition module 206, used to acquire the second powder supply amount according to the area of ​​the to-be-printed region, the thickness to be formed and the sintering shrinkage coefficient;

[0133] The total powder supply amount acquisition module 207 is used to acquire the total powder supply amount of the current forming layer according to the first powder supply amount and the second powder supply amount.

[0134] It should be noted that, since the 3D printing powder supply calculation device provided in this embodiment includes any of the 3D printing powder supply calculation methods provided in the embodiments of the present invention, the 3D printing powder supply calculation device can be implemented by software and / or hardware. Therefore, the 3D printing powder supply calculation device provided in the embodiments of the present invention includes the technical features of the 3D printing powder supply calculation method provided in any embodiment of the present invention, and can achieve the beneficial effects of the 3D printing powder supply calculation method provided in any embodiment of the present invention. The similarities can be referred to the above description of the 3D printing powder supply calculation method provided in the embodiments of the present invention, and will not be repeated here.

[0135] Based on the same inventive concept, the embodiment of the present invention further provides a printing device, and further reference is made to Figure 1 and Figure 2, the printing device includes a powder spreading unit 101, a molding unit 102 and a control unit; the control unit is connected to the powder spreading unit 101 and the molding unit 102 respectively, the molding unit 102 includes a molding cylinder 1021 and a laser emitting subunit 1022, the molding cylinder 1021 is used to contain powder to form a workpiece to be printed, and the laser emitting subunit 1022 is used to irradiate the powder to form the workpiece to be printed; the control unit is used to execute the 3D printing powder supply calculation method described in any of the above embodiments. Therefore, the printing device provided in the embodiment of the present invention includes the technical features of the 3D printing powder supply calculation method provided in any embodiment of the present invention, and can achieve the beneficial effects of the 3D printing powder supply calculation method provided in any embodiment of the present invention. The similarities can be referred to the above description of the 3D printing powder supply calculation method provided in the embodiment of the present invention, which will not be repeated here.

[0136] The printing device also includes a powder supply unit 103, a lifting unit 104, a powder spreading motion unit 105, a printing cabin bottom plate 106 and a printing base plate 107. The powder supply unit 103 is connected to the control unit and is used to supply powder to the powder spreading unit 101; the lifting unit 104 drives the workpiece to be printed to move and adjusts the height of the forming cylinder 1031; the powder spreading motion unit 105 is used to drive the powder spreading unit 101 to move, and the printing cabin bottom plate 106 and the printing base plate 107 are used to play a supporting role.

[0137] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0138] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0139] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0140] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0141] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the method for calculating the powder supply amount for 3D printing according to any one of the above embodiments is implemented.

[0142] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0143] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for calculating the amount of powder supplied for 3D printing, applied to a printing device, wherein the printing device comprises a powder spreading unit and a molding unit, wherein the molding unit comprises a molding cylinder and a laser emitting subunit, wherein the molding cylinder is used to contain powder for forming a workpiece to be printed, and the laser emitting subunit is used to irradiate the powder to form the workpiece to be printed, wherein: include: Obtain the forming width of the current forming layer where the workpiece to be printed is located; Get the thickness of the current forming layer to be formed; Obtaining a first powder supply amount according to the forming width and the thickness to be formed; Obtaining the area of ​​the to-be-printed region of the current forming layer where the to-be-printed workpiece is located; Get the sintering shrinkage coefficient of the current molding layer; Obtaining a second powder supply amount according to the area of ​​the to-be-printed region, the to-be-molded thickness, and the sintering shrinkage coefficient; The total powder supply amount of the current forming layer is obtained according to the first powder supply amount and the second powder supply amount.

2. The 3D printing powder supply calculation method according to claim 1, characterized in that: Before obtaining the forming format of the current forming layer where the workpiece to be printed is located, it also includes: Get the total thickness and molding times of the workpiece to be printed; The thickness to be formed of each forming layer in the workpiece to be printed is obtained according to the total thickness and the number of forming times.

3. The 3D printing powder supply calculation method according to claim 1, characterized in that: Obtaining a first powder supply amount according to the forming width and the thickness to be formed includes: Acquire a first powder spreading width and a first powder spreading length according to the forming width; The first powder supply amount is obtained according to the first powder spreading width, the first powder spreading length and the thickness to be formed.

4. The 3D printing powder supply calculation method according to claim 1, characterized in that: Obtaining the area of ​​the to-be-printed region of the current forming layer where the to-be-printed workpiece is located, including: Get the powder spreading width of the powder spreading unit; Obtaining the to-be-printed length of the current forming layer where the to-be-printed workpiece is located; The area of ​​the to-be-printed region of the current forming layer where the to-be-printed workpiece is located is obtained according to the powder spreading width and the to-be-printed length.

5. The 3D printing powder supply calculation method according to claim 4, characterized in that: The powder spreading width is the same as the first powder spreading width of the molding surface.

6. The 3D printing powder supply calculation method according to claim 1, characterized in that: Acquiring the total powder supply amount of the current forming layer according to the first powder supply amount and the second powder supply amount includes: The total powder supply of the current forming layer is obtained by summing up the first powder supply and the second powder supply.

7. A 3D printing powder supply calculation device, characterized in that: Applied to a printing device, the printing device includes a powder spreading unit and a molding unit, the molding unit includes a molding cylinder and a laser emitting subunit, the molding cylinder is used to contain powder to form a workpiece to be printed, the laser emitting subunit is used to irradiate the powder to form the workpiece to be printed, and the 3D printing powder supply amount calculation device includes: A forming format acquisition module is used to acquire the forming format of the current forming layer where the workpiece to be printed is located; A module for obtaining thickness to be formed, used for obtaining the thickness to be formed of the current forming layer; A first powder supply amount acquisition module, used for acquiring a first powder supply amount according to the forming width and the thickness to be formed; A module for obtaining the area of ​​a region to be printed, used for obtaining the area of ​​a region to be printed on the current forming layer where the workpiece to be printed is located; A sintering shrinkage coefficient acquisition module is used to obtain the sintering shrinkage coefficient of the current molding layer; A second powder supply amount acquisition module, used for acquiring a second powder supply amount according to the area of ​​the to-be-printed region, the to-be-molded thickness and the sintering shrinkage coefficient; A total powder supply amount acquisition module is used to acquire the total powder supply amount of the current forming layer according to the first powder supply amount and the second powder supply amount.

8. A printing device, characterized in that: The printing device comprises a powder spreading unit, a molding unit and a control unit; The molding unit comprises a molding cylinder and a laser emitting subunit, wherein the molding cylinder is used to contain powder for forming a workpiece to be printed, and the laser emitting subunit is used to irradiate the powder to form the workpiece to be printed; The control unit is used to execute the 3D printing powder supply calculation method described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the 3D printing powder supply amount calculation method according to any one of claims 1 to 6 when executed.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the computer program implements the 3D printing powder supply calculation method according to any one of claims 1 to 6.

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