CN107790718B

CN107790718B - Control system of 3D printing equipment

Info

Publication number: CN107790718B
Application number: CN201711098185.4A
Authority: CN
Inventors: 窦鹤鸿
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-09
Filing date: 2017-11-09
Publication date: 2020-03-31
Anticipated expiration: 2037-11-09
Also published as: CN107790718A

Abstract

The application provides a control system that 3D printed equipment relates to 3D and prints technical field, and control system includes: 3D printing equipment and a master control device; the 3D printing apparatus includes: the light source moving device is positioned in the light source chamber; the light source moving device includes: a fixed part, a movable part and a moving mechanism; the main control device is used for issuing a movement control instruction to the moving mechanism and/or the movable part according to the graphic shape of the current processing layer of the object to be printed, and controlling the moving mechanism and/or the movable part to drive the light source mechanism to move on the fixed part according to a set processing sequence based on the movement control instruction; the movable range of the light source mechanism can be increased due to the fact that the light source mechanism moves along the fixing portion, the problems that the size scale of a 3D printer machining structural piece is small and the machining precision is poor due to the fact that the light source mechanism moves are solved, the size scale of the forming component is increased, and the machining precision is improved.

Description

Control system of 3D printing equipment

Technical Field

The application relates to the technical field of printing control, in particular to a control system of 3D printing equipment.

Background

Additive manufacturing 3D printing technology is a technology which takes a digital model file as a base and uses adhesive materials such as powdered metal or plastic to construct an object in a layer-by-layer printing mode.

In the prior art, a powder supply system, a construction chamber and an operation chamber of the 3D printing equipment are all designed into an integrated box-type machine body. The construction chamber is internally provided with a piston and a piston plate, the piston plate is movably provided with an operation substrate, when the piston plate pushes the operation substrate to rise to a thickness different from the bottom of the operation chamber by a metal powder layer operation surface, the metal powder layer with the thickness of one operation surface is paved by a powder supply device to form the operation surface, then a laser system arranged at the top of the 3D printer reflects a laser beam to the metal powder layer on the current operation surface through a laser galvanometer, and the current metal powder layer is selectively melted according to the shape of the current layer slice pattern through the adjustment of a control system on the deflection angle of the laser galvanometer, thereby completing the processing operation on the current layer of the construction part. After the operation of the metal powder layer of the current slice pattern is finished, the workbench descends by the height of a preset layer, the powder supply system lays metal powder with the preset layer thickness on the workbench, then the laser system selectively melts the metal powder according to the shape of the slice pattern of the current layer, the metal powder is repeatedly processed according to the method, and the complete forming component is finally obtained through layer-by-layer overlapping operation.

However, the light source mechanisms of the 3D printing equipment in the prior art are all fixed points and are mounted on the printer, and cannot move in the working chamber, so that the size scale of the 3D printer for processing the structural part is greatly limited, and the processing operation requirement of large-size components cannot be met.

Disclosure of Invention

In view of this, an object of the embodiments of the present application is to provide a control system of a 3D printing apparatus, in which a light source moving device drives a light source mechanism to move intelligently, so as to increase a moving range of the light source mechanism, thereby increasing a size of a forming member and improving a processing precision.

In a first aspect, an embodiment of the present application provides a control system for a 3D printing apparatus, including: 3D printing equipment and a master control device; the 3D printing apparatus includes: the light source mechanism comprises a light source chamber, at least one light source moving device and a light source mechanism, wherein the light source moving device is positioned in the light source chamber; the light source moving device includes: a fixed part, a movable part and a moving mechanism; the fixing part is fixedly arranged in the light source chamber; the movable part is movably connected with the fixed part; the moving mechanism is movably connected with the movable part and is used for driving the movable part to move on the fixed part; the light source mechanism is arranged on the movable part;

the main control device is electrically connected with the moving mechanism and/or the movable part and is used for issuing a movement control instruction to the moving mechanism and/or the movable part according to the graphic shape of the current processing layer of the object to be printed and controlling the moving mechanism and/or the movable part to move on the fixed part based on the movement control instruction so as to enable the movable part to drive the light source mechanism to move; the movement control instructions include at least: start-up time, machining sequence, and machining path.

With reference to the first aspect, embodiments of the present application provide a first possible implementation manner of the first aspect, where the light source mechanism includes a laser electrically connected to the main control device;

the main control device is also used for generating a laser control instruction carrying laser output parameters of the laser according to the processing material of the object to be printed; the laser output parameters include: scanning path, processing sequence, processing direction, spot diameter, spot wavelength, processing time and processing power;

and the laser is used for emitting laser to a processing material of the object to be printed through the galvanometer and the scanning field lens according to the laser control instruction so as to finish processing operation of the printed object.

With reference to the first aspect, an embodiment of the present application provides a second possible implementation manner of the first aspect, where the control system of the 3D printing apparatus further includes a first temperature sensing device; the 3D printing apparatus further comprises: a refrigeration device and a cooling liquid tank; the light source mechanism further includes: a laser emitting device and an optical fiber cable; the laser emitting device is connected with the laser through the optical fiber cable; the cooling liquid tank is communicated with the light source chamber; the refrigerating device is used for refrigerating the cooling liquid in the cooling liquid tank;

the first temperature sensing device is used for monitoring temperature data of the laser emitting device and the optical fiber cable in the light source chamber and sending the monitored temperature data to the main control device;

the main control device is further used for increasing the refrigerating temperature of the refrigerating device and the supply and circulation speed of the cooling liquid in the cooling liquid tank in the light source chamber when the temperature data is detected to be higher than a first set temperature threshold; and when the temperature data is detected to be lower than the first set temperature threshold value, the refrigerating temperature of the refrigerating device is reduced, and the supply and circulation speed of the cooling liquid tank in the light source chamber are reduced.

With reference to the first aspect, an embodiment of the present application provides a third possible implementation manner of the first aspect, where the 3D printing apparatus further includes a powder feeding device; the 3D printing equipment further comprises a powder feeding device; the powder feeding device is internally provided with a first heating device and a second temperature sensing device;

the main control device is also used for generating a powder feeding instruction carrying powder feeding parameters of the powder feeding device on each processing layer according to the thickness of the current processing layer of the object to be printed; generating a descending instruction for controlling the descending of the powder feeding device according to the triggering operation of the user; the powder feeding parameters comprise: rise time and rise height;

the powder feeding device is used for driving the powder feeding piston plate to ascend according to the powder feeding instruction; driving the powder feeding device to descend according to the descending instruction;

the second temperature sensing device is used for monitoring the temperature data of the powder feeding device and sending the monitored temperature data to the main control device;

the main control device is further used for controlling a first heating device in the powder feeding device to heat the powder feeding device when the temperature data in the powder feeding device is monitored to be lower than a second set temperature threshold value, so as to preheat metal powder in the powder feeding device.

With reference to the third possible implementation manner of the first aspect, an embodiment of the present application provides a fourth possible implementation manner of the first aspect, where the 3D printing apparatus further includes: a powder paving device and a powder leveling device;

the main control device is also used for generating a powder paving instruction of the current layer of the object to be printed when the powder feeding device is detected to reach the set powder paving height;

the powder paving device is used for paving the metal powder placed on the powder feeding device on the operation platform according to the powder paving instruction;

the main control device is further used for generating a powder leveling instruction for controlling the powder leveling device after detecting that the powder paving of the powder paving device is finished;

and the powder leveling device is used for leveling the metal powder on the operation platform according to the powder leveling instruction.

With reference to the third possible implementation manner of the first aspect, an embodiment of the present application provides a fifth possible implementation manner of the first aspect, where the 3D printing apparatus further includes: a build chamber and a build chamber lift; an operation platform is arranged in the construction chamber; a third temperature sensing device and a second heating device are respectively arranged in the construction chamber;

the main control device is also used for generating an operation control instruction carrying the descending height of the construction chamber lifting device according to the thickness of the current processing layer of the object to be printed;

the construction chamber lifting device is used for controlling the construction chamber to descend by the height of the current layer thickness according to the operation control instruction;

the third temperature sensing device is used for monitoring the temperature data in the construction room and sending the monitored temperature data to the main control device;

the main control device is further used for controlling the second heating device in the building chamber to heat when the temperature data in the building chamber is monitored to be lower than a third set temperature threshold value, and controlling the second heating device to stop heating until the temperature data in the building chamber is monitored to reach the third set temperature threshold value.

With reference to the fifth possible implementation manner of the first aspect, the present application provides an example of a sixth possible implementation manner of the first aspect, wherein the building chamber lifting device includes a building chamber piston plate, the work table is composed of a work base plate, and is movably placed on the building chamber piston plate during work, a fourth temperature sensing device is disposed in the base plate, and a third heating device is disposed in the building chamber piston plate;

the fourth temperature sensing device is arranged on the operation substrate, is positioned in the operation platform, and is used for monitoring the temperature data of the operation platform and sending the monitored temperature data to the main control device;

the main control device is further configured to control the third heating device in the piston plate of the build chamber to heat when the temperature data of the work table is monitored to be lower than a fourth set temperature threshold, and control the third heating device to stop heating until the temperature data in the substrate is monitored to reach the fourth set temperature threshold.

With reference to the fifth possible implementation manner of the first aspect, the present application provides a seventh possible implementation manner of the first aspect, wherein the control system of the 3D printing apparatus further includes an oxygen content detection device; the 3D printing apparatus further comprises a protective gas supply mechanism; the working table is positioned in a working chamber, and the protective gas supply mechanism is communicated with the light source chamber, the working chamber and the construction chamber;

the oxygen content detection equipment is used for detecting the oxygen content of the light source chamber, the operation chamber and the construction chamber and sending the oxygen content obtained by monitoring to the main control device;

the main control device is further used for controlling and increasing the injection amount of the protective gas injected into the light source chamber, the working chamber and the construction chamber by the protective gas supply mechanism when the oxygen content is monitored to be larger than a set oxygen content threshold value; and controlling to reduce the injection amount of the protective gas injected into the build chamber by the protective gas supply mechanism when the oxygen content is monitored to be less than a set oxygen content threshold.

With reference to the sixth possible implementation manner of the first aspect, the present examples provide an eighth possible implementation manner of the first aspect, wherein the apparatus further includes a particulate matter monitoring device; the 3D printing apparatus further comprises a working room protective gas circulation filtration device:

the particle monitoring equipment is used for monitoring the content of particles in the operation chamber and sending the monitored content of the particles to the main control device;

the main control device is further used for controlling the circulating filtering strength of the working chamber protective gas circulating filtering equipment and switching the working mode of the working chamber protective gas circulating filtering equipment according to the content of the particles.

With reference to the first aspect, an embodiment of the present application provides a ninth possible implementation manner of the first aspect, where the control system of the 3D printing apparatus further includes at least one mechanical arm controller electrically connected to the main control device: the 3D printing apparatus further comprises at least one mechanical arm and a forge casting hammer mounted on the mechanical arm; the number of the mechanical arm controllers is the same as that of the mechanical arms, and one mechanical arm controller correspondingly controls one mechanical arm;

the main control device is further used for determining the number of the mechanical arms to be started and second processing parameters of the mechanical arms according to the graphic shape and the processing material of the current processing layer of the object to be printed, and generating second path control instructions corresponding to each mechanical arm controller according to the second processing parameters; the second processing parameter includes: a forging and casting sequence, a forging and casting path, a forging and casting force, a forging and casting direction and a forging and casting area;

and the mechanical arm sub-controller is used for receiving the second path control instruction and controlling the mechanical arm to move correspondingly according to a second processing parameter in the second path control instruction so that the mechanical arm drives the forging and casting hammer to work.

The control system that 3D printed equipment that this application embodiment provided includes: 3D printing equipment and a master control device; the 3D printing apparatus includes: the light source mechanism comprises a light source chamber, at least one light source moving device and a light source mechanism, wherein the light source moving device is positioned in the light source chamber; the light source moving device includes: a fixed part, a movable part and a moving mechanism; the fixing part is fixedly arranged in the light source chamber; the movable part is movably connected with the fixed part; the moving mechanism is movably connected with the movable part and is used for driving the movable part to move on the fixed part; the light source mechanism is arranged on the movable part; the main control device is electrically connected with the moving mechanism and/or the movable part and used for issuing a movement control instruction to the moving mechanism and/or the movable part according to the graphic shape of the current processing layer of the object to be printed and controlling the moving mechanism and/or the movable part to move on the fixed part based on the movement control instruction so as to enable the movable part to drive the light source mechanism to move; the light source moving device drives the light source mechanism to move intelligently, the moving range of the light source mechanism is increased, the size of a forming component can be increased, and meanwhile, the processing precision can be improved.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 shows a schematic structural diagram of a control system of a 3D printing apparatus according to an embodiment of the present application.

Fig. 2 shows an overall structural schematic diagram of a light source moving device provided in an embodiment of the present application.

Fig. 3 shows a schematic diagram of the position of the slide block on the parent car in the embodiment of the present application.

FIG. 4 is a schematic view of the overall structure of a cooling apparatus according to an embodiment of the present application;

fig. 5 is a schematic view illustrating an internal structure of a sleeve of a cooling device according to an embodiment of the present application.

Fig. 6 shows a schematic structural diagram of a 3D printing apparatus provided in an embodiment of the present application.

Fig. 7 is a schematic structural diagram of a powder laying device and a powder feeding device in a 3D printing device provided in an embodiment of the present application.

Fig. 8 shows a schematic structural diagram of a build chamber in a 3D printing apparatus provided by an embodiment of the present application.

FIG. 9 shows a cross-sectional view of a square-shaped build chamber with a second heating device disposed and a square-shaped powder feeder with a first heating device disposed as provided by an embodiment of the present application.

FIG. 10 shows a top view of a circular build chamber with a second heating device deployed and a circular powder feeder with a first heating device deployed as provided by embodiments of the present application.

FIG. 11 shows a cross-sectional view of another circular build chamber with a second heating device deployed and a circular powder feeder with a first heating device deployed as provided by embodiments of the present application.

Icon: 10-a master control device; 30-3D printing device; 301-a fixed part; 302-a first fixed arm; 303-a second fixed arm; 304-a third stationary arm; 305-a fourth fixed arm; 306-mother vehicle; 307-a first bus arm; 308-a second bus arm; 309-third bus arm; 310-a fourth bus arm; 311-child vehicle; 312-a laser emitting device; 313-a first drive; 314-a first active part; 315-first driven part; 316-first drive; 318-a slider; 100-a cooling device; 110-a sleeve; 111-a separator; 112-a liquid inlet channel; 113-a return channel; 117-fiber optic cable cover segment; 118-laser emitting device cover segment; 120-liquid inlet pipe; 130-a return conduit; 140-a refrigeration device; 150-cooling liquid tank; 160-liquid drive means; 1-constructing a forming device; 2-a powder supply system; 3-a body platform; 4-a working chamber; 5-powder filling port; 6-residual powder suction port; 11-a working platform; 12-a build chamber; 13-a build chamber lifting device; 21-powder feeding device; 22-a powder spreading device; 23-a powder flattening device; 114-a substrate; 115-build chamber piston plate; 211-powder feeding cylinder; 212-powder feeding piston plate; 213-powder feeding piston; 221-powder spreading roller; 231-a flat powder piece; 232-a flat powder piece driving mechanism; 233-powder collecting cylinder; 401. a heat receiving layer; 402. a heating layer; 403. a heat-insulating layer; 404. a cooling layer; 405. and (6) installing a layer frame.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the embodiment of the application, the data interaction processing is responsible for coordinating the division of labor and coordination of each system. The main system marks the shape of a scanned graph on a working plane according to a CAD graph analysis system, determines a processing path, a processing distance, the lifting height of each layer of the powder feeding piston 213, the descending height of each layer of the construction chamber lifting device 13, the number of working layers of the forging and casting hammer and the forging force, transmits an analysis result to the main system, and sends a working instruction to each subsystem according to various data of scanning, and coordinates, manages and monitors the working state of each subsystem.

The embodiment of the present application provides a control system of a 3D printing apparatus 30, as shown in fig. 1, including: the 3D printing apparatus 30 and the main control device 10; the 3D printing apparatus 30 includes: the light source moving device is positioned in the light source chamber; the light source moving device includes: a fixed part, a movable part and a moving mechanism; the fixing part is fixedly arranged in the light source chamber; the movable part is movably connected with the fixed part; the moving mechanism is movably connected with the movable part and is used for driving the movable part to move on the fixed part; the light source mechanism is arranged on the movable part;

the main control device 10 is configured to issue a movement control instruction to the moving mechanism and/or the movable portion according to a graphic shape of a current processing layer of an object to be printed, and control the moving mechanism and/or the movable portion to move on the fixed portion based on the movement control instruction, so that the movable portion drives the light source mechanism to move; the movement control instructions include at least: start-up time, machining sequence, and machining path.

In this application, the light source moving device may include two structures:

the first kind of intelligence single locomotive structure: the light source moving device includes: a fixed part, a movable part and a moving mechanism; the movable part is connected with the fixed part in a sliding way; the moving mechanism is connected with the movable part; the moving mechanism is electrically connected with a control system of the 3D printer and used for driving the movable part to move along the circumferential direction relative to the fixed part or driving the movable part to linearly slide relative to the fixed part or move along the circumferential direction; the movable part is used for installing a light source mechanism of the 3D printer; the fixing part is fixedly arranged in the light source chamber. As an alternative, the light source mechanism of the embodiment of the present application is a laser mechanism (i.e., a laser emitting device 312 described below).

The light source moving device provided by the embodiment of the application comprises a fixed part, a movable part and a moving mechanism. When the laser printer is used, the laser mechanism of the 3D printer is installed on the movable portion, the fixed portion is fixedly arranged in the light source chamber, and the moving mechanism is electrically connected with the main control device.

When the main control device controls the moving mechanism to drive the movable part to move along the circumferential direction relative to the fixed part, the laser mechanism irradiates a light beam to the metal powder layer on the working surface to be selectively melted in the moving process, and finally, the forming and manufacturing of the component are finished, so that the cylindrical component is manufactured

When the main control device controls the moving mechanism to drive the movable part to linearly slide relative to the fixed part, the moving mechanism drives the movable part to linearly slide relative to the fixed part and simultaneously drives the laser mechanism on the movable part 2 to linearly move, and the laser mechanism irradiates a light beam to a metal powder layer on a working surface to be selectively melted in the moving process, so that the forming and manufacturing of the component are finally completed.

The second double-moving-vehicle structure: the moving mechanism is a mother vehicle 306, the movable portion is a child vehicle 311, and fig. 2 is a schematic view of the overall structure of the light source moving device in the embodiment of the present application. Referring to fig. 2, the present embodiment provides a light source moving device, which includes a fixed portion 301, a mother vehicle 306, a child vehicle 311, and a laser emitting device 312 disposed on the child vehicle 311. The mother vehicle 306 is slidably connected to the fixed portion 301 and can be driven by the second driving device on the fixed portion 301 to move in the first predicted direction relative to the fixed portion 301. The sub-cart 311 is slidably connected to the mother cart 306 and can be driven by a second driving device on the mother cart 306 to move in a second predicted direction relative to the mother cart 306. Therefore, the laser emitting device 312 can move on the motion plane defined by the first prediction direction and the second prediction direction, and has a larger movement range.

In the present embodiment, the fixing portion 301 has a rectangular frame structure, and includes a first fixing arm 302, a second fixing arm 303, a third fixing arm 304, and a fourth fixing arm 305, which form a rectangular frame. First fixed arm 302 is parallel to and opposite to second fixed arm 303, and third fixed arm 304 is parallel to and opposite to fourth fixed arm 305. Since the first fixing arm 302 and the second fixing arm 303 extend in the first prediction direction and the third fixing arm 304 and the fourth fixing arm 305 extend in the second prediction direction, it can be understood that the first prediction direction is perpendicular to the second prediction direction.

FIG. 2 is a schematic diagram illustrating the position of the slide block 318 on the parent vehicle 306 according to an embodiment of the present disclosure; fig. 3 is a schematic view of the sliding block 318 and the sliding groove in the embodiment of the present application. Referring to fig. 1 to fig. 3, in the present embodiment, the mother vehicle 306 is a rectangular frame structure, and the mother vehicle 306 includes a first mother vehicle arm 307, a second mother vehicle arm 308, a third mother vehicle arm 309 and a fourth mother vehicle arm 310; the outer sides of the first mother arm 307 and the second mother arm 308 are slidably connected to the inner sides of the first fixing arm 302 and the second fixing arm 303, respectively. In detail, the outer sides of the first mother arm 307 and the second mother arm 308 are respectively provided with a sliding block 318, and the inner sides of the first fixing arm 302 and the second fixing arm 303 are respectively provided with a sliding groove (not shown in fig. 2) extending along the length direction of the fixing arm, and the sliding groove is matched with the sliding block 318 at the outer sides of the first mother arm 307 and the second mother arm 308. To increase the stability of the parent vehicle 306, the slider 318 is configured as a dovetail and the runner is configured as a dovetail groove. It should be understood that the cross-section of the sliding block 318 and the sliding groove is not limited to a dovetail shape, but can be changed in shape as required, for example, the sliding groove is designed to be a rectangular groove and a circular groove and is provided with the sliding block 318 with a corresponding shape; in other embodiments, the sliding connection between the mother vehicle 306 and the fixing portion 301 may be realized by providing a sliding groove on the mother vehicle 306 and a sliding block on the fixing portion 301.

In this embodiment, in order to reduce the sliding friction force of the bus 306 relative to the fixing portion 301 and make the movement of the bus 306 more sensitive, two sliders 318 are respectively disposed on the first bus arm 307 and the second bus arm 308, and the two sliders 318 are respectively disposed at two ends of the bus arm where the two sliders 318 are disposed, so that the contact area between the sliders 318 and the sliding grooves is smaller than that when the elongated sliders are disposed along the length direction of the first bus arm 307 (or the second bus arm 308). It should be understood that, in other embodiments, the number of the sliding blocks 318 on the first mother vehicle arm 307 and the second mother vehicle arm 308 may be increased or decreased, and the sliding blocks 318 may also be arranged in a long strip shape along the length direction of the first mother vehicle arm 307 (or the second mother vehicle arm 308); even tracks may be provided on the first and second securing

arms

302, 303 and pulleys may be provided on the first and

second mother arms

307, 308 to achieve a sliding connection.

In this embodiment, two first driving devices 313 are disposed on the fixing portion 301, and the two first driving devices 313 are disposed on two sides of the fixing portion 301 where the first fixing arm 302 and the second fixing arm 303 are located, and are in transmission connection with the first bus arm 307 and the second bus arm 308, respectively, so as to drive the bus 306 to move in the first prediction direction relative to the fixing portion 301. It should be understood that in other embodiments, one first driving device 313 may be disposed on the fixing portion 301, and more than two first driving devices 313 may be disposed on the fixing portion.

According to the control system of the 3D printing equipment 30 provided by the embodiment of the application, the number of the moving mechanisms and/or the moving parts to be started and the moving load distance of the moving mechanisms and/or the moving parts are determined through the main control device 10 according to the graphic shape of the current processing layer of the object to be printed, and the moving mechanisms and/or the moving parts are controlled to move according to the moving load distance, so that the moving parts drive the light source mechanism to move, the moving range of the laser mechanism can be increased due to the fact that the light source mechanism moves along the fixed part, the problem that the size scale of a 3D printer processing structural part is limited due to limited movement of the laser mechanism is avoided, and the size of a forming component is further increased.

Further, in the control system of the 3D printing apparatus 30 provided in the embodiment of the present application, the light source mechanism includes a laser electrically connected to the main control device 10;

the main control device 10 is further configured to generate a laser control instruction carrying laser output parameters of the laser according to the processing material of the object to be printed; the laser output parameters include: scanning path, processing sequence, processing direction, spot diameter, spot wavelength, processing time, processing distance and processing power;

and the laser is used for emitting laser to the processing material of the object to be printed according to the laser control instruction.

Here, the main control device 10 is preset with an embedded laser scanning processing control algorithm, and the software determines laser output parameters such as a scanning path, a processing sequence, a processing direction, a spot diameter, a spot wavelength, a processing time, a processing distance, and a processing power according to a processing material of an object to be printed, and generates a laser control command for controlling the laser according to the laser output parameters. The laser itself is also used to report the operation log to the master control device 10, and the master control device 10 coordinates the cooperation of the laser and other control parts according to the operation log.

Further, the control system of the 3D printing apparatus 30 provided in the embodiment of the present application further includes a first temperature sensing device; the 3D printing apparatus 30 further includes: a refrigeration device 140 and a cooling liquid tank 150; the light source mechanism further includes: a laser emitting device and an optical fiber cable; the laser emitting device is connected with the laser through an optical fiber cable; the cooling liquid tank 150 is communicated with the light source chamber; the refrigerating device 140 is used for refrigerating the cooling liquid in the cooling liquid tank 150;

the temperature sensing component is used for monitoring the temperature data of the laser emitting device and the optical fiber cable in the light source chamber and sending the monitored temperature data to the main control device 10;

the main control device 10 is further configured to increase the cooling temperature of the cooling device 140 and the supply and circulation speed of the cooling liquid in the cooling liquid tank 150 in the light source chamber when the temperature data is detected to be higher than the first set temperature threshold; and, when the detected temperature data is lower than the first set temperature threshold, reducing the cooling temperature of the cooling device 140, and the supply and circulation speed of the cooling liquid tank 150 in the light source compartment.

Fig. 4 is a schematic view of the overall structure of the cooling device 100 provided in embodiment 1 of the present application, and fig. 2 is a schematic view of the internal structure of the sleeve 110 of the cooling device 100 provided in embodiment 1 of the present application. Referring to fig. 4 in combination with fig. 5, the present embodiment provides a cooling apparatus 100, which includes a sleeve 110, wherein the sleeve 110 defines an accommodating space; a plurality of channels extending from one end to the other end in the axial direction of the sleeve 110 are provided therein; a plurality of channels are arranged around the axis of the sleeve 110; one end of the channel is an open end, and the other end of the channel is a closed end; a partition plate 111 extending from the open end to the closed end is arranged in the channel; the partition 111 divides the channel into a liquid inlet channel 112 and a return channel 113 which are parallel; the partition 111 is spaced apart from the closed end to form a communication passage for communicating the liquid inlet passage 112 with the return passage 113.

In the present embodiment, in the axial direction of the sleeve 110, the sleeve 110 includes an optical fiber cable covering section 117 and a laser emitting device covering section 118 connected to each other; the optical fiber cable covering section 117 is made of a flexible material and can be bent and swung; the open end is located at the end of the fiber optic cable covering section 117 distal from the laser emitting device covering section 118; the closed end is located at the end of the laser emitting device distal from the fiber optic cable covering section 117. The sleeve 110 is configured to include the optical fiber cable covering section 117 and the laser emitting device covering section 118, which are connected to each other, so as to facilitate cooling of the optical fiber cable and the laser emitting device for transmitting laser inside the working room 4, so as to improve the difficulty in heat dissipation of the optical fiber cable and the laser emitting device, and easily cause the burning of the optical fiber cable and the laser emitting device for transmitting laser inside the working room 4. With optic fibre cable cover section 117 design for flexible material, the optic fibre cable cover section 117 of being convenient for removes along with optic fibre cable, realizes the real-time cooling to optic fibre cable, more can let laser emission device pass through the crooked swing of optic fibre cable, develops the processing operation in wider range, improves the 3D and prints the volume numerical value of equipping 30 operation areas and configuration spare.

As shown in fig. 6, it should be noted that in the present embodiment, the liquid inlet pipe 120 is disposed to introduce the cooling medium into the liquid inlet channel 112, and the return pipe 130 is disposed to discharge the cooling medium in the return channel 113, so as to better realize the flow of the cooling medium in the sleeve 110. It is understood that in other embodiments, the liquid inlet pipe 120 and the return pipe 130 may not be provided, and the liquid inlet device and the return discharge device in the prior art may be adopted according to the user's requirement.

In the present embodiment, the cooling device 100 further includes a refrigeration device 140 and a cooling liquid tank 150; the refrigerating device 140 is connected to the cooling liquid tank 150 for cooling the liquid in the cooling liquid tank 150; the cooling liquid tank 150 is provided with a port connected to the return pipe 130 and a liquid driving device 160 connected to the liquid inlet pipe 120. The refrigerating device 140 and the cooling liquid tank 150 are arranged, in the implementation process, after the cooling medium in the cooling liquid tank 150 is subjected to the refrigerating effect of the refrigerating device 140, the cooling medium is guided by the liquid inlet pipe 120 to enter the liquid inlet channel 112 and further flow into the backflow channel 113, and then flows into the cooling liquid tank 150 through the backflow pipe 130, and the cooling effect on the optical fiber cable and the laser emitting device is achieved through the circulation. The cooling liquid tank 150 is provided with a port connected to the return pipe 130, and a liquid driving device 160 connected to the liquid inlet pipe 120 for increasing the pressure of the cooling medium, so as to facilitate the rapid flow of the cooling medium in the liquid inlet passage 112 and the return passage 113, and to better achieve the cooling effect.

Further, referring to fig. 6 to 8, in the control system of the 3D printing apparatus 30 provided in the embodiment of the present application, the 3D printing apparatus 30 further includes a powder feeding device 21; the powder feeding device 21 is provided with a first heating device and a second temperature sensing device;

the main control device 10 is further configured to generate a powder feeding instruction carrying powder feeding parameters of the powder feeding device 21 on each processing layer according to the thickness of the current processing layer of the object to be printed; and generating a descending instruction for controlling the descending of the powder feeding device 21 according to the triggering operation of the user; the powder feeding parameters comprise: rise time and rise height;

the powder feeding device 21 is used for driving the powder feeding piston plate to ascend according to a powder feeding instruction; and driving the powder feeding device to descend according to the descending instruction;

the second temperature sensing device is used for monitoring the temperature data of the powder feeding device and sending the monitored temperature data to the main control device 10;

the main control device 10 is further configured to control the first heating device in the powder feeding device 21 to heat the powder feeding device when the temperature data in the powder feeding device 21 is monitored to be lower than a second set temperature threshold.

Here, the powder feeding device 21 includes two powder feeding assemblies; each powder feeding assembly comprises a powder feeding cylinder 211, a powder feeding piston 213 and a powder feeding piston plate 212; the powder feeding piston plate 212 is used for placing metal powder required by printing operation;

in the embodiment of the application, a second temperature sensing device and a first heating device are arranged in the inner wall of the powder feeding cylinder 211 and the powder feeding piston plate 212, the second temperature sensing device and the first heating device are electrically connected with the main control device 10, the second temperature sensing device monitors the temperature data in the powder feeding cylinder 211 and the powder feeding piston plate 212, and sends the monitored temperature data to the main control device 10; when detecting that the temperature data in the powder feeding cylinder 211 and the powder feeding piston plate 212 is lower than the second set temperature threshold, the main control device 10 controls the first heating device in the powder feeding device 21 to heat the powder feeding cylinder 211 and the powder feeding piston plate 212.

Further, in the control system of the 3D printing apparatus provided in the embodiment of the present application, the 3D printing apparatus 30 further includes: a powder spreading device 22 and a powder leveling device 23;

the main control device 10 is further configured to generate a powder spreading instruction of a current layer of the object to be printed when detecting that the powder feeding device 21 reaches the set powder spreading height;

the powder paving device 22 is used for paving the metal powder placed on the powder feeding device 21 on a working platform according to the powder paving instruction;

the main control device 10 is further configured to generate a powder leveling instruction for controlling the powder leveling device 23 after detecting that the powder paving by the powder paving device 22 is completed;

and the powder leveling device 23 is used for leveling the metal powder on the operation platform according to the powder leveling instruction.

The overall structure of the powder feeding device 21, the powder spreading device 22 and the powder placing device 23 in the 3D printing apparatus 30 in the embodiment of the present application is described below with reference to fig. 6 to 8:

the 3D printing equipment 30 includes a component forming device and a powder supply system 2, the component forming device includes a work table 11, the powder supply system 2 includes a powder laying device 22 and a powder feeding device 21, the powder laying device 22 includes a powder laying roller driving mechanism and two powder laying rollers 221, and the two powder laying rollers 221 are oppositely disposed at a first end and a second end of the work table 11. In operation, the powder spreading roller driving mechanism drives the two powder spreading rollers 221 while reciprocating above the work table 11 to spread the metal powder in the powder feeder 21 on the work table 11.

The 3D printing that this application embodiment provided equips 30, when spreading the powder, two shop's powder roller 221 simultaneous workings lay the metal powder in the powder feeding device 21 on operation platform 11 simultaneously, have improved shop's powder efficiency. Especially when the machine works on a large-size working face, the working efficiency is improved, the machine can be used for forming large-size components with the length, width and height of more than or equal to 600mm, and the worldwide problem that the popularization and application of the process technology are severely restricted in 30 years is solved. Meanwhile, when the powder paving roller 221 paves the metal powder on the operation table 11, the metal powder is rolled, that is, the powder paving roller 221 paves the metal powder in a rolling mode, so that the metal powder layer on the operation table 11 is more compact, and the powder paving roller has an important effect on improving the overall density and the appearance smoothness of the formed component.

The powder spreading roller driving mechanism can drive the two powder spreading rollers 221 to move in the same direction at the same time, and can also drive the two powder spreading rollers 221 to move in opposite directions at the same time. Preferably, the powder applying roller driving mechanism is used to drive the two powder applying rollers 221 to move in opposite directions simultaneously. That is, before the work, the two powder spreading rollers 221 are located at both ends of the work table 11, and during the work, the powder spreading roller driving mechanism drives the two powder spreading rollers 221 to move toward the center of the work table 11 at the same time. Thus, the powder spreading efficiency can be greatly improved.

On the basis of the above embodiment, further, the powder feeding device 21 includes two powder feeding assemblies; each powder feeding assembly comprises a powder feeding cylinder 211, a powder feeding piston 213 and a powder feeding piston plate 212; the two powder feeding cylinders 211 are respectively arranged at the first end and the second end of the workbench 11; the powder feeding piston plate 212 is arranged in the powder feeding cylinder 211, and the powder feeding piston 213 is connected with the powder feeding piston plate 212 and is used for driving the powder feeding piston plate 212 to move up and down; the powder feeding piston plate 212 is used for placing metal powder required by operation. In fig. 6, the powder is added through the powder filling port 5, and the remaining powder is sucked out through the remaining powder suction port 6.

In this embodiment, the two powder feeding cylinders 211 are respectively disposed at the first end and the second end of the work table 11, the driving mechanism of the powder spreading roller 221 drives the two powder spreading rollers 221 to move, and when the powder spreading rollers 221 move towards the work table 11, the powder spreading rollers 221 push the metal powder in the powder feeding cylinders 211 to the work table 11, so as to lay the metal powder on the work table 11. The selective laser melting mechanism selectively melts the metal powder layer on the work table 11, then the work table 11 in the powder laying device 22 moves downwards to a preset height, the two powder laying rollers 221 return to the original positions, the powder feeding piston 213 in each powder feeding cylinder 211 drives the powder feeding piston plate 212 to move upwards, so that the metal powder on the powder feeding piston plate 212 moves and rises to the preset height, the two powder laying rollers 221 move towards the work table 11 again, the metal powder in the powder feeding cylinders 211 is pushed onto the work table 11 again, and the selective laser melting mechanism selectively melts the metal powder layer on the work table 11 again. Thereafter, the work table 11 is lowered again, and the powder feeding piston plate 212 is raised again, so that the cycle is repeated, and finally the metal powder of a predetermined thickness is spread on the work table 11.

In this embodiment, the powder feeding device 21 is provided as two powder feeding assemblies, and the two powder feeding cylinders 211 are respectively disposed at the first end and the second end, that is, one powder spreading roller 221 is correspondingly provided with one powder feeding cylinder 211, so that the powder feeding roller can quickly spread the metal powder in the powder feeding cylinder 211 on the working platform 11, and the working efficiency is further improved.

Fig. 9 shows a cross-sectional view of a square construction chamber with a second heating device and a square powder feeding device with a first heating device, the powder feeding cylinders 211 are schematic of a square, the construction chamber 12 is between the two powder feeding cylinders 211, wherein each powder feeding cylinder 211 comprises a multilayer structure, wherein the vertical walls of the powder feeding cylinders 211 are respectively a heated layer 401, a heated layer 402, an insulating layer 403, a cooling layer 404 and a mounting shelf 405 from inside to outside; wherein, the first heating device is arranged on the heating layer, and the heat generated by the first heating device is transferred to the metal powder in the powder feeding cylinder 211 through the heat receiving layer 401 to preheat the metal powder. The heat insulating layer 403 is used for pressing heat generated by heating of the heating device into the first layer so as to better preheat the metal powder in the powder feeding cylinder 211. The cooling layer 404 is used for cooling the temperature of the layer, so that a worker can approach and contact the powder feeding cylinder 211 and operate the powder feeding cylinder 211; in particular, cooling in the cooling layer can be achieved by means of a cooling device and a cooling liquid.

Meanwhile, a powder feeding piston plate 212 is arranged in the powder feeding cylinder 211, the powder feeding piston plate 212 is also of a multilayer structure, and the powder feeding piston plate comprises a heating layer 401, a heating layer 402, a heat insulation layer 403, a cooling layer 404 and a mounting layer frame 405 from top to bottom in sequence; similarly, the powder feeding piston plate 212 also includes a first heating device, which is also provided on the heating layer of the powder feeding piston plate 212, and the heat generated by the first heating device is transferred to the metal powder in the powder feeding piston plate 212 through the heat receiving layer 401 to preheat the metal powder. The insulating layer 403 is used for pressing heat generated by heating of the heating device into the first layer so as to better preheat the metal powder on the powder feeding piston plate 212. The cooling layer 404 is used for cooling the temperature of the layer, so that a worker can approach and contact the powder feeding cylinder 211 and operate the powder feeding cylinder 211; in particular, cooling in the cooling layer can be achieved by means of a cooling device and a cooling liquid.

Fig. 10 shows a top view of a circular-shaped build chamber with a second heating device and a circular-shaped powder feeding device with a first heating device, the build chamber 12 is arranged between two powder feeding cylinders 211, and in fig. 10, the inner wall 503 of each powder feeding cylinder is of a multilayer structure and sequentially comprises a heating layer 401, a heating layer 402, an insulating layer 403, a cooling layer 404 and a mounting layer frame 405 from the center to the outside; the outer wall 504 of the powder feeding cylinder is of a multilayer structure, and the powder feeding cylinder sequentially comprises a heating layer 401, a heating layer 402, a heat insulation layer 403, a cooling layer 404 and a mounting layer frame 405 from the circle center to the outside. A powder feeding piston plate 212 is provided between the powder feeding cylinder inner wall 503 and the powder feeding cylinder outer wall 504, and the powder feeding piston plate 212 is also a multilayer structure including, from top to bottom, a heat receiving layer 401, a heating layer 402, a heat insulating layer 403, a cooling layer 404, and an installation layer frame 405.

The multilayer structure of the powder feeding cylinder inner wall 503, the powder feeding cylinder outer wall 504 and the powder feeding piston plate 212 is shown in fig. 11.

On the basis of the above embodiment, further, the powder supply system 2 further includes a flat powder device 23; the powder leveling device 23 comprises a powder leveling part 231, a powder leveling part driving mechanism 232 and two powder collecting cylinders 233; the operation platform 11 is square; the two powder collecting cylinders 233 are respectively arranged at the third end and the fourth end of the workbench 11, and are used for receiving the excessive powder after the leveling piece 231 levels the workbench 11; the powder flattening member driving mechanism 232 is connected to the powder flattening member 231, and is used for driving the powder flattening member 231 to reciprocate between the two powder collecting cylinders 233 so as to flatten the metal powder on the working table 11.

The working process of the powder leveling device 23 is as follows, when the powder paving roller 221 paves the metal powder in the powder feeding cylinder 211 at a preset height on the working platform 11, the powder leveling part driving mechanism 232 drives the powder leveling part 231 to reciprocate between the two powder collecting cylinders 233, the powder leveling part 231 scrubs the metal powder on the working platform 11, and the redundant metal powder moves along with the powder leveling part 231 and finally falls into the powder collecting cylinders 233 to be collected. That is, when the flat powder 231 moves from the third end to the fourth end, the excessive metal powder falls into the powder collecting cylinder 233 located at the fourth end. When the flat powder 231 moves from the fourth end to the third end, the excess metal powder falls into the powder collecting cylinder 233 located at the third end.

In this embodiment, the arrangement of the leveling member 231 can level the metal powder on the work table 11, so that the metal powder layer on the work table 11 is more flat, and further, the selective laser melting mechanism can selectively melt the metal powder layer to form a finer and more standard component. The third end and the fourth end of the workbench 11 are respectively provided with a powder collecting cylinder 233, and the two powder paving rollers 221 are respectively arranged at the first end and the second end of the workbench 11, so that the structure is compact, and the occupied space is reduced. The two powder collecting cylinders 233 are arranged at positions capable of fully receiving the redundant metal powder generated when the powder leveling member 231 works, and the metal powder is prevented from falling into the outside.

The flat powder 231 may be a flat powder plate, a flat powder block, or a flat powder brush. Preferably, the flat powder member 231 is a flat brush, and the flat brush uniformly acts on the metal powder layer, so that the metal powder layer can be leveled most effectively.

On the basis of the above embodiment, further, the flat powder driving mechanism 232 includes a flat powder motor, a gear and a rack engaged with the gear; the gear is arranged on a power output shaft of the powder leveling motor; the flat powder 231 is fixed on the rack; the flat powder motor is used for driving the rack to move back and forth through the gear.

In this embodiment, the flat powder driving mechanism 232 is configured as a flat powder motor, a gear and a rack. The flat powder driving motor 304 drives the gear to rotate forward and backward, and the gear drives the rack to move forward and backward, so as to drive the flat powder piece 231 to move back and forth. Simple structure and convenient operation.

Further, in the control system of the 3D printing apparatus 30 provided in the embodiment of the present application, the 3D printing apparatus 30 further includes: a build chamber 12 and a build chamber lift 13; the construction room lifting device 13 is connected with the operation platform 11; the work table 11 is provided in the build chamber 12; a work substrate 114 is provided on the work table 11; a third temperature sensing device and a second heating device are respectively arranged in the construction chamber 12;

the main control device 10 is further configured to generate an operation control instruction carrying the lowering height of the building chamber lifting device 13 according to the thickness of the current processing layer of the object to be printed;

and the building chamber lifting device 13 is used for controlling the building chamber 12 to descend by the height of the current layer thickness according to the operation control instruction.

The third temperature sensing device is used for monitoring temperature data in the construction room 12 and sending the monitored temperature data to the main control device 10;

the main control device 10 is further configured to, when it is monitored that the temperature data in the building chamber 12 is lower than a third set temperature threshold, control the second heating device in the building chamber 12 to heat, and control the second heating device to stop heating until it is monitored that the temperature data in the building chamber 12 reaches the third set temperature threshold.

Specifically, the temperature in the building chamber 12 is to be kept at a certain temperature, in order to effectively control the stress effect of the molding building, in this way, a third temperature sensing device and a second heating device are arranged in the building chamber 12, in this embodiment of the present application, both the inner wall and the outer wall of the building chamber 12 are provided with the third temperature sensing device, the temperature data of the main control device 10 in the inner wall of the building chamber is smaller than a third set temperature threshold, and the second heating device is started to heat the temperature in the inner wall of the building chamber; and the temperature data of the main control device 10 in the outer wall of the building chamber is greater than the fifth set temperature threshold, and the cooling device is started to cool the outer wall of the building chamber, so that a worker can approach the building chamber 12, monitor the building chamber 12 and take out the building chamber 12 for molding construction.

Further, in the control system of the 3D printing apparatus provided in the embodiment of the present application, the build chamber lifting device 13 includes a build chamber piston plate 115, the work table is composed of a base plate 114 (i.e., a work base plate), and is movably placed on the build chamber piston plate 115 during a work, a fourth temperature sensing device is disposed in the base plate 114, and a third heating device is disposed in the build chamber piston plate 115;

the fourth temperature sensing device is arranged on the operation substrate, is positioned in the operation platform 11, and is used for monitoring the temperature data of the operation platform and sending the monitored temperature data to the main control device 10;

the main control device 10 is further configured to control a third heating device in the piston plate 115 of the build chamber to heat when the temperature data of the work table 11 is monitored to be lower than a fourth set temperature threshold, and control the third heating device to stop heating until the temperature data in the substrate 114 is monitored to reach the fourth set temperature threshold.

Here, the forming structure is placed in the forming chamber 12, and usually the outer wall of the just completed forming member surrounds the powder, and the forming member is maintained at a certain temperature every time the member of one processing layer is formed, and at this time, if the temperature of the forming chamber elevating device 13 is low, the temperature of the powder surrounding the outside of the forming member is low, which absorbs the temperature of the forming member, thereby increasing the stress reaction of the forming member.

Therefore, a fourth temperature sensing device is arranged in the base plate 114, a third heating device is arranged in the piston plate 115 of the building chamber, the temperature data inside the base plate 114 is sensed through the fourth temperature sensing device, and when the master control device 10 detects that the temperature data inside the base plate 114 is lower than a fourth set threshold value, the third heating device in the piston plate 115 of the building chamber is controlled to heat until the temperature data inside the base plate 114 reaches the fourth set temperature threshold value, and the fourth heating device is controlled to stop heating. Therefore, the temperature of the forming member can be better embraced, and the stress effect of the forming member can be effectively controlled.

The first heating device, the second heating device, the third heating device and the fourth heating device (hereinafter referred to as heating devices) may be resistance wire heating, infrared heating, or the like. When the heating device is a resistance wire for heating, the resistance wire can be uniformly covered on the inner wall of the construction chamber 12 and the like, and the resistance wire heats the inner wall of the construction chamber 12 after being electrified.

The first to fifth set threshold values may be the same or different. In this embodiment of the application, the first temperature threshold to the fifth temperature threshold are different, and specific temperature values of the first temperature threshold to the fifth temperature threshold are set according to specific printed articles.

As shown in fig. 7 and 8, on the basis of the above-described embodiment, further, the build molding apparatus 1 includes a build chamber 12 and a build chamber lifting device 13; the work table 11 is provided in the build chamber 12; the construction chamber lifting device 13 is connected with the operation platform 11 and is used for driving the operation platform 11 to move up and down; a workpiece taking port is formed in the outer wall of the construction chamber 12; a workpiece taking switch is arranged at the workpiece taking opening; the pickup switch is used for opening or closing the pickup opening.

In this embodiment, after the work table 11 lays a layer of metal powder layer, the selective laser melting mechanism selectively melts the metal powder layer on the work table 11, and then the build chamber lifting device 13 drives the work table 11 to move downward by a preset height. The powder spreading roller 221 continues to spread the metal powder layer having the height to the work table 11, and the selective laser melting mechanism selectively melts the metal powder layer on the work table 11, so that the circulation is performed, and the component is finally formed. The user then opens the take-out switch on the outer wall of the build chamber 12 so that the take-out port is opened. And finally, taking out the component from the component taking port to finish the work.

Fig. 9 shows a cross-sectional view of a square construction chamber with a second heating device and a square powder feeding device with a first heating device, two powder feeding cylinders 211 are respectively arranged on two sides of the construction chamber 12, wherein the construction chamber 12 comprises a multilayer structure, wherein the vertical walls of the construction chamber 12 are respectively a heated layer 401, a heating layer 402, an insulating layer 403, a cooling layer 404 and a mounting layer frame 405 from inside to outside; wherein the second heating means is provided in the heating layer, and heat generated by the heating means is transferred to the metal powder in the build chamber 12 through the heat receiving layer 401 to preheat the metal powder. The insulating layer 403 functions to press heat generated by the heating device into the first layer, so as to better preheat the metal powder in the building chamber 12. The purpose of cooling layer 404 is to cool the temperature of the layer so that a worker may approach, contact, and operate build chamber 12; in particular, cooling in the cooling layer can be achieved by means of a cooling device and a cooling liquid.

Meanwhile, a construction chamber piston plate 115 is arranged in the construction chamber 12, the construction chamber piston plate 115 is also of a multilayer structure, and the construction chamber piston plate is sequentially provided with a heating layer 401, a heating layer 402, an insulating layer 403, a cooling layer 404 and an installation layer frame 405 from top to bottom; similarly, a second heating device is also included in the build chamber piston plate 115, the first heating device also being disposed on a heating layer of the build chamber piston plate 115, and heat generated by the second heating device is transferred to the build structure in the build chamber piston plate 115 through the heated layer 401 to preheat the build structure. The insulating layer 403 functions to press heat generated by the heating device into the first layer, so as to better preheat the metal powder on the piston plate 115 of the build chamber. The purpose of cooling layer 404 is to cool the temperature of the layer so that a worker may approach, contact, and operate build chamber 12; in particular, cooling in the cooling layer can be achieved by means of a cooling device and a cooling liquid.

Fig. 10 is a top view of a circular building chamber with a second heating device and a circular powder feeding device with a first heating device, and fig. 11 is a cross-sectional view of another circular building chamber with a second heating device and a circular powder feeding device with a first heating device, which are provided in this embodiment of the present application, wherein the inner wall 501 of the building chamber is a multilayer structure, and the inner wall sequentially includes a heated layer 401, a heated layer 402, an insulating layer 403, a cooling layer 404 and an installation shelf 405 from the center of a circle to the outside; the outer wall 502 of the building chamber is a multi-layer structure, which comprises a heating layer 401, a heating layer 402, an insulating layer 403, a cooling layer 404 and a mounting layer frame 405 in sequence from the center of a circle to the outside. Moreover, a build chamber piston plate 115 is disposed between the build chamber inner wall 501 and the build chamber outer wall 502, and the build chamber piston plate 115 is also a multilayer structure, and comprises a heating layer 401, a heating layer 402, an insulating layer 403, a cooling layer 404 and a mounting layer 405 from top to bottom.

Wherein the multilayer structure of build chamber inner wall 501, build chamber outer wall 502 and build chamber piston plate 115 is shown in figure 11.

Further, the control system of the 3D printing apparatus 30 provided in the embodiment of the present application further includes an oxygen content detection device; the 3D printing apparatus 30 further comprises a protective gas supply mechanism; a working table 11 is positioned in the working chamber 4, and a protective gas supply mechanism is communicated with the light source chamber, the working chamber 4 and the construction chamber 12;

the oxygen content detection equipment is used for detecting the oxygen content of the light source chamber, the operation chamber 4 and the construction chamber 12 and sending the oxygen content obtained by monitoring to the main control device 10;

the main control device 10 is further configured to control and increase the injection amount of the protective gas injected by the protective gas supply mechanism to the light source chamber, the working chamber 4 and the construction chamber 12 when the monitored oxygen content is greater than the set oxygen content threshold; and controlling to reduce the injection amount of the protective gas into the build chamber 12 by the protective gas supply mechanism when the monitored oxygen content is less than the set oxygen content threshold.

Further, the control system of the 3D printing apparatus 30 provided in the embodiment of the present application further includes a particulate matter monitoring device; the 3D printing apparatus 30 further comprises a working room 4 protective gas circulation filtration device:

the particle monitoring equipment is used for monitoring the content of the particles in the operation room 4 and sending the monitored content of the particles to the main control device 10;

the main control device 10 is further configured to control the intensity of the circulation filtration of the protective gas circulation filtration equipment in the operation room 4 and switch the operation mode of the protective gas circulation filtration equipment in the operation room 4 according to the content of the particulate matter.

Further, the control system of the 3D printing apparatus 30 provided in the embodiment of the present application further includes at least one mechanical arm controller electrically connected to the main control device 10: the 3D printing equipment 30 further comprises at least one mechanical arm and a forging hammer mounted on the mechanical arm; the number of the mechanical arm controllers is the same as that of the mechanical arms, and one mechanical arm controller correspondingly controls one mechanical arm;

the main control device 10 is further configured to determine, according to the graphic shape and the processing material of the current processing layer of the object to be printed, the number of the mechanical arms 301 to be started and a second processing parameter of each mechanical arm 301, and generate a second path control instruction corresponding to each mechanical arm controller 20 according to the second processing parameter; the second processing parameters include: a forging and casting sequence, a forging and casting path, a forging and casting force, a forging and casting direction and a forging and casting area;

and the mechanical arm controller 20 is configured to receive a second path control instruction, and control the corresponding mechanical arm 301 to move according to a second processing parameter in the second path control instruction, so that the mechanical arm 301 drives the forging and casting hammer to work.

Specifically, the forging and casting hammer is detachably connected with the mechanical arm 301; the driving device and the first rotating device are electrically connected with a control system of the 3D printer.

In this embodiment, the forging and casting hammer is detachably connected to the mechanical arm 301, so that different types of forging and casting hammers can be installed according to different requirements of users, and meanwhile, the user can replace or maintain the forging and casting hammer in the using process.

In the embodiment, the type of the forging and casting hammer is not limited, and forging and casting hammers with different shapes can be adopted in different use environments according to the requirements of users, so that the use range of the forging and casting hammer is further enlarged.

The first rotating device drives the mechanical arm 301 to rotate vertically relative to the fixed seat 302, so that the mechanical arm 301 drives the forging hammer to extend or retract to the fixed seat 302. Thereby can realize that arm 301 drives the product of forging and casting hammer realization making 3D printer and forge and cast, make product inner structure more closely knit, and then greatly reduced is because the volume change that expend with heat and contract with cold brought. Further, the product is forged and cast through the forging and casting hammer, the internal stress of the product can be greatly eliminated, the product is not easy to warp and deform due to the internal stress, and the product quality is greatly improved.

In this embodiment, the hammer is arranged on the second sub-arm, which allows the hammer to rotate vertically. The cooperation is used through the while of first sub-arm and second sub-arm, can make the perpendicular pivoted scope of arm bigger for the position scope that the forging and casting hammer removed is wider, increases the dynamics of hammering.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments provided in the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures, and moreover, the terms "first", "second", "third", etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the present disclosure, which should be construed in light of the above teachings. Are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A control system of a 3D printing apparatus, comprising: 3D printing equipment and a master control device; the 3D printing apparatus includes: the device comprises a light source chamber, a light source moving device and a light source mechanism, wherein the light source moving device and the light source mechanism are positioned in the light source chamber; the light source moving device includes: a fixed part, a movable part and a moving mechanism; the fixing part is fixedly arranged in the light source chamber; the movable part is movably connected with the fixed part; the moving mechanism is movably connected with the movable part and is used for driving the movable part to move on the fixed part; the light source mechanism is arranged on the movable part;

the main control device is electrically connected with the moving mechanism and/or the movable part and is used for issuing a movement control instruction to the moving mechanism and/or the movable part according to the graphic shape of the current processing layer of the object to be printed and controlling the moving mechanism and/or the movable part to move on the fixed part based on the movement control instruction so as to enable the movable part to drive the light source mechanism to move; the movement control instructions include at least: starting time, processing sequence and processing path;

the control system of the 3D printing equipment further comprises a first temperature sensing device; the 3D printing apparatus further comprises: a refrigeration device and a cooling liquid tank; the light source mechanism further includes: a laser emitting device and an optical fiber cable; the laser emitting device is connected with a laser through the optical fiber cable; the cooling liquid tank is communicated with the light source chamber; the refrigerating device is used for refrigerating the cooling liquid in the cooling liquid tank; the laser emitting device is arranged on the movable part;

2. The control system of the 3D printing apparatus of claim 1, wherein the light source mechanism comprises a laser electrically connected to the master control device;

the main control device is also used for generating a laser control instruction carrying laser output parameters of the laser according to the processing material of the object to be printed; the laser output parameters include: scanning path, processing sequence, processing direction, spot diameter, laser wavelength, processing time and processing power;

3. The control system of the 3D printing apparatus according to claim 1, wherein the 3D printing apparatus further comprises a powder feeding device; the powder feeding device is internally provided with a first heating device and a second temperature sensing device;

the powder feeding device is used for driving the powder feeding device to ascend according to the powder feeding instruction; driving the powder feeding device to descend according to the descending instruction;

4. The control system of a 3D printing apparatus according to claim 3, wherein the 3D printing apparatus further comprises: a powder paving device and a powder leveling device;

5. The control system of a 3D printing apparatus according to claim 3, wherein the 3D printing apparatus further comprises: a build chamber and a build chamber lift; an operation platform is arranged in the construction chamber; a third temperature sensing device and a second heating device are respectively arranged in the construction chamber;

6. The control system of the 3D printing apparatus according to claim 5, wherein the build chamber lifting device comprises a build chamber piston plate, the work table is formed by a work base plate, the work table is movably placed on the build chamber piston plate during work, a fourth temperature sensing device is arranged in the base plate, and a third heating device is arranged in the build chamber piston plate;

7. The control system of the 3D printing apparatus according to claim 5, further comprising an oxygen content detection device; the 3D printing apparatus further comprises a protective gas supply mechanism; the working table is positioned in a working chamber, and the protective gas supply mechanism is communicated with the light source chamber, the working chamber and the construction chamber;

8. The control system of the 3D printing apparatus of claim 6, further comprising a particulate matter monitoring device; the 3D printing apparatus further comprises a working room protective gas circulation filtration device:

9. The control system of the 3D printing apparatus according to claim 1, further comprising at least one robotic arm controller electrically connected to the master control device: the 3D printing equipment further comprises a mechanical arm and a forging and casting hammer, wherein the forging and casting hammer is installed on the mechanical arm; the number of the mechanical arm controllers is the same as that of the mechanical arms, and one mechanical arm controller correspondingly controls one mechanical arm;

and the mechanical arm sub-controller is used for receiving the second path control instruction and controlling the mechanical arm to move correspondingly according to a second processing parameter in the second path control instruction so as to drive the forging and casting hammer to work.