CN217617596U - 3D prints sand mould monitored control system - Google Patents
3D prints sand mould monitored control system Download PDFInfo
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- CN217617596U CN217617596U CN202221640833.0U CN202221640833U CN217617596U CN 217617596 U CN217617596 U CN 217617596U CN 202221640833 U CN202221640833 U CN 202221640833U CN 217617596 U CN217617596 U CN 217617596U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model relates to a 3D prints sand mould monitored control system, install shower nozzle and CMOS camera used for jet ink on this monitored control system's the printing dolly, assemble the linear displacement sensor on the corresponding guide rail of sand distributor, sand spreader and printing dolly, the signal output part of the linear displacement sensor links to each other with the central control machine; the central control machine is connected with the upper computer, the central control machine is connected with servo motors for controlling the lifting platform, the sand separator, the sand spreader and the printing trolley to move, each servo motor is provided with a coder, and the servo motors and the coders are connected with the central control machine through a servo control cabinet; the control end of the spray head and the control end of the CMOS camera are connected with the central control machine, and the image output end of the CMOS camera is directly connected with the upper computer; and a weighing sensor is assembled below the sand separator, and the signal output end of the weighing sensor is connected with a central control machine. The sensor is added in the whole process of sand mould 3D printing, the data change of the middle process is monitored and stored, and the change process datamation of printing is enabled to be readable.
Description
Technical Field
The utility model relates to a sand casting technique, more specifically relates to a 3D prints sand mould monitored control system.
Background
In the sand casting process, due to the addition of the 3D printing technology, compared with the traditional mold making, the 3D printing sand mold technology simplifies the process of making the mold, not only saves the production cost, but also improves the speed and the flexibility of mold making, and saves a large amount of capital for constructing a mold storage room and professional mold maintenance personnel.
However, in the process of 3D printing of the sand mold, due to the influence of factors such as a printing nozzle, a sand bed, gravel, a printing environment and the like, the 3D printing sand mold process is not controlled sufficiently, the printing process cannot be controlled, and the sand mold forming precision is influenced, so that the 3D printing sand mold monitoring system is provided.
SUMMERY OF THE UTILITY MODEL
Not enough to above-mentioned prior art, the utility model discloses the technical problem who plans to solve provides a 3D prints sand mould monitored control system.
In order to solve the technical problem, the utility model discloses a technical scheme is:
A3D printing sand mold monitoring system comprises a lifting platform, an X-direction linear guide rail, a Y-direction linear guide rail, a sand spreader, a sand divider, a center control machine, an upper computer, a servo control cabinet, a printing trolley and a plurality of servo motors provided with encoders; the method is characterized in that:
the printing trolley is provided with a nozzle for ink jet and a CMOS camera, the sand separator is arranged on a Y-direction linear guide rail, one Y-direction linear guide rail is perpendicular to two X-direction linear guide rails, the two X-direction linear guide rails are arranged in parallel, and the sand separator can move back and forth on the Y-direction linear guide rail and can move left and right on the two X-direction linear guide rails along with the Y-direction linear guide rails; the sand spreader is arranged between the two X-direction linear guide rails and can realize position adjustment in the X direction along the two X-direction linear guide rails; the central control machine is connected with the upper computer, the central control machine is connected with a servo motor for controlling the lifting platform, the sand separator, the sand spreader and the printing trolley to move, and the central control machine is electrically connected with a spray head for controlling ink jet; the moving guide rail of the printing trolley is positioned below the two X-direction linear guide rails, and the printing trolley can move left and right on the moving guide rail;
the sand separator, the sand spreader and the printing trolley are provided with linear displacement sensors on corresponding guide rails, and the signal output ends of the linear displacement sensors are connected with the central control machine;
the sand separator, the sand spreader, the lifting platform and the guide rails arranged on the printing trolley are respectively driven by corresponding servo motors, each servo motor is provided with an encoder, and the servo motors and the encoders are connected with a central control machine through a servo control cabinet;
the control end of the spray head and the control end of the CMOS camera are connected with the central control machine, and the image output end of the CMOS camera is directly connected with the upper computer;
and a weighing sensor is assembled below the sand separator, and the signal output end of the weighing sensor is connected with a central control machine.
The linear displacement sensor is a grating ruler or a magnetic grid ruler, the magnetic grid ruler is arranged on the motion path of the sand separator, the sand spreader and the printing trolley, and the magnetic grid ruler is connected with the central control machine.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses 3D prints sand mould monitored control system, add the sensor at the overall process that sand mould 3D printed, sand box height when descending to the sand box, divide the knockout volume of sand ware, the roll process of sand ware, the sanding position, print the shower nozzle state, shower nozzle inkjet position, the data change of these intermediate processes of shower nozzle velocity of motion and inkjet figure monitors and save, with well accuse machine and host computer connection, can be to the concrete change of every step in the accuse was printed, the change process datamation that makes the printing has readability.
Drawings
Fig. 1 is the utility model discloses 3D prints sand mould monitored control system's schematic structure.
In the figure, a lifting platform 1, an X-direction linear guide rail 2, a Y-direction linear guide rail 3, a sand spreader 4, a sand separator 5, a central control machine 6, an upper computer 7, a servo control cabinet 8, a servo motor 9, an encoder 10, a printing trolley 11, a spray head 12, a CMOS camera 13 and a linear displacement sensor 14.
Detailed Description
The present invention will be further explained with reference to the following examples and drawings, but the scope of the present invention is not limited thereto.
The utility model relates to a 3D printing sand mould monitoring system, which comprises a lifting platform 1, an X-direction linear guide rail 2, a Y-direction linear guide rail 3, a sand spreader 4, a sand distributor 5, a central control machine 6, an upper computer 7, a servo control cabinet 8, a printing trolley 11 and a plurality of servo motors 9 provided with encoders 10; a nozzle 12 for ink jet and a CMOS camera 13 are arranged on the printing trolley, the sand separator is arranged on a Y-direction linear guide rail 3, one Y-direction linear guide rail 3 is perpendicular to two X-direction linear guide rails 2, the two X-direction linear guide rails 2 are arranged in parallel, the sand separator can move back and forth on the Y-direction linear guide rail and can move left and right on the two X-direction linear guide rails along with the Y-direction linear guide rails, and the position of the sand separator in the X direction and the Y direction can be adjusted; the sand spreader is arranged between the two X-direction linear guide rails 2 and can realize position adjustment in the X direction along the two X-direction linear guide rails 2; the central control machine is connected with the upper computer, meanwhile, the central control machine is connected with a servo motor for controlling the lifting platform, the sand distributor, the sand spreader and the printing trolley to move, and the central control machine is electrically connected with a spray head for controlling ink jet. The moving guide rail of the printing trolley is positioned below the two X-direction linear guide rails 2, and the printing trolley can move left and right on the moving guide rail.
The sand-spreading device comprises a sand separator, a sand spreader and a printing trolley, wherein linear displacement sensors are assembled on corresponding guide rails of the sand separator, the sand spreader and the printing trolley, the signal output ends of the linear displacement sensors are connected with a central control machine, the linear displacement sensors are grating rulers or magnetic grating rulers, and the positions of the printing trolley and the sand spreading position are obtained by monitoring parameters through the linear displacement sensors;
the sand separator, the sand spreader, the lifting platform and the guide rail arranged on the printing trolley are respectively driven by corresponding servo motors, each servo motor is provided with an encoder, the servo motors and the encoders are connected with a central control machine through a servo control cabinet, and the moving speed and the sand spreading moving speed of the printing trolley are obtained by monitoring the angular speed through the encoders of the servo motors and calculating;
the printing trolley is provided with a spray head and a CMOS camera, the control end of the spray head and the control end of the CMOS camera are connected with a central control machine, the image output end of the CMOS camera is directly connected with an upper computer, the upper computer receives an ink-jet image shot by the CMOS camera, the central control machine is connected with the upper computer, the state of the printing spray head is obtained through an electric pulse signal applied to the spray head by the central control machine, and the CMOS camera scans the ink-jet image characteristics of the current printing layer slice to complete ink-jet image detection;
a weighing sensor is assembled below the sand separator, the signal output end of the weighing sensor is connected with a central control machine, and the quantity of sand supplied and shaked out is obtained by monitoring parameters through the weighing sensor;
calculating by monitoring the rotating speed and power of a servo motor for controlling the movement of the sand paving device to obtain the sand paving movement torsion, wherein the power can be obtained by current feedback calculation under a constant pressure state;
the sand box displacement of the printing working surface under the action of the lifting platform is obtained by monitoring the parameters of a servo motor controlling the lifting platform to lift.
The linear displacement and the rotating speed of the corresponding servo motor can be known through the encoder, so that the linear displacement of the object controlled to move by the servo motor can be known; and magnetic grid rulers are arranged on the motion paths of the sand separator, the sand spreader and the printing trolley and are connected with a central control machine.
Linear displacement sensors are assembled on corresponding guide rails of the sand separator, the sand spreader and the printing trolley, the signal output end of each linear displacement sensor is connected with a central control machine, and the obtained positions of the printing trolley and the sand spreading position are obtained through monitoring parameters of the linear displacement sensors;
the sand separator, the sand spreader, the lifting platform and the guide rail arranged on the printing trolley are respectively driven by corresponding servo motors, each servo motor is provided with an encoder, the servo motors and the encoders are connected with a central control machine through a servo control cabinet, and the moving speed of the printing trolley and the moving speed of the sand spreader are obtained by monitoring the angular speed of the encoders of the servo motors and calculating; the linear displacement of the controlled moving object can be obtained through a servo motor;
a weighing sensor is assembled below the sand separator, the signal output end of the weighing sensor is connected with a central control machine, and the quantity of sand supplied and shaked out is obtained by monitoring parameters through the weighing sensor;
the CMOS camera scans to obtain the ink-jet pattern of the currently printed layer slice.
Further, the utility model discloses 3D prints sand mould monitored control system's printing method, including following step:
the method comprises the following steps: the height of the sand box lifting platform is adjusted to descend, the descending height is the thickness of the model slice layer, the thickness data of the layer is compared with the descending height of each layer of the sand box set by a sand box displacement negative feedback and a central control machine, and the fed back central control machine controls the printing working plane to descend stably to ensure the slice thickness;
step two: the sand separator moves to a printing working surface for shakeout, and the weighing sensor feeds the shakeout quantity back to the central control machine to be compared with the given required sand quantity parameter so as to control the shakeout quantity;
step three: the sand paving device is used for paving gravel on a printing working surface, the linear displacement sensor is used for detecting the position of the sand paving device in real time, the speed of the sand paving device can be obtained by calculating the position and the movement time obtained by the detection of the linear displacement sensor, or the speed can be obtained by a servo motor encoder for controlling the movement of the sand paving device, the movement torque of the sand paving device can be obtained according to a torque force formula, T = 9550P/n, wherein P is power, n is the rated rotation speed of the servo motor, T is the torque force, P is obtained by current feedback calculation in a constant pressure state, and the sand paving device is controlled to stably pave sand by the feedback of the sand paving position, the sand paving movement speed and the sand paving movement torque force;
step four: layering the 3D model by using layering software, performing infiltration error compensation on slices to generate slice images, corresponding the pixel arrays of the slice images generated by the slicing software to nozzles one by one, sending a signal to a spray head by a central control machine according to the positions of the nozzles, and receiving a pulse signal by the nozzles at corresponding positions to jet ink; and the infiltration error compensation compensates the peripheral outline of each layer of slices in the layered software, so that the infiltration error of the sand mold is reduced. The layering software can be realized by the prior art, such as open-source PrusaSerier software, yang Weidong, gao Xiangyu, liu Weisheng, sandalwood, zhang Zhengyan. Infiltration error compensation algorithm [ J ] in 3DP process based on droplet ejection, 2021,57 (21): 269-278. The like also discloses the layering software which can carry out 3D printing infiltration error compensation algorithm.
Step five: the printing trolley is provided with a nozzle and a CMOS scanning camera which move towards the X, Y direction, an image is printed on a printing working surface, meanwhile, the camera scans the printed ink-jet image, the ink-jet printing image is subjected to image recognition, the position coordinate, the edge outline and the internal filling information of the image are extracted, the characteristics of the ink-jet image and the system slice image are subjected to comparative analysis and processing, and the completeness of the printed image is ensured; the edge contour detection can be realized by a Canny edge detection algorithm, an improved Canny edge detection algorithm, a Laplace edge detection algorithm and the like;
yang Guotian et al (Yang Guotian, zhang Jian, wu Hua, liu Changan, FPGA-based high-speed image acquisition processing system [ J ]. University of china science and technology (natural science edition), 2013,41 (S1): 149-152. Doi.
The positions of the printing trolley in the X direction and the Y direction are detected in real time through the linear displacement sensor, the speed of the printing trolley can be obtained through calculation of the position and the movement time obtained through detection of the linear displacement sensor, or can be obtained through a servo motor encoder controlling the movement of the printing trolley in the X direction and the Y direction, and the state of the printer nozzle is obtained through an electric pulse signal applied to the nozzle by a central control machine.
Step six: and judging whether the printing is finished or not, repeating the steps from the first step to the fifth step if the printing is not finished, and finishing the sand mold printing if the printing is finished.
The utility model discloses a to 3D print sand mould overall process add sensor, the process of image is printed to monitoring perception shakeout, sanding and shower nozzle, the data of each step of feedback to adjust the printing of one deck down, monitor the motion node of every control process, solved 3D and printed the not enough problem that influences sand mould shaping precision of sand mould process control.
The utility model discloses the nothing is mentioned the part and is applicable to prior art.
Claims (2)
1. A3D printing sand mold monitoring system comprises a lifting platform, an X-direction linear guide rail, a Y-direction linear guide rail, a sand spreader, a sand distributor, a center control machine, an upper computer, a servo control cabinet, a printing trolley and a plurality of servo motors provided with encoders; the method is characterized in that:
the printing trolley is provided with a nozzle for ink jet and a CMOS camera, the sand separator is arranged on a Y-direction linear guide rail, one Y-direction linear guide rail is perpendicular to two X-direction linear guide rails, the two X-direction linear guide rails are arranged in parallel, and the sand separator can move back and forth on the Y-direction linear guide rail and can move left and right on the two X-direction linear guide rails along with the Y-direction linear guide rails; the sand spreader is arranged between the two X-direction linear guide rails and can realize position adjustment in the X direction along the two X-direction linear guide rails; the central control machine is connected with the upper computer, the central control machine is connected with servo motors for controlling the lifting platform, the sand separator, the sand spreader and the printing trolley to move, each servo motor is provided with a coder, and the servo motors and the coders are connected with the central control machine through a servo control cabinet; the moving guide rail of the printing trolley is positioned below the two X-direction linear guide rails, and the printing trolley can move left and right on the moving guide rail;
the sand separator, the sand spreader and the printing trolley are provided with linear displacement sensors on corresponding guide rails, and the signal output ends of the linear displacement sensors are connected with the central control machine;
the control end of the spray head and the control end of the CMOS camera are connected with the central control machine, and the image output end of the CMOS camera is directly connected with the upper computer;
and a weighing sensor is assembled below the sand separator, and the signal output end of the weighing sensor is connected with a central control machine.
2. A3D printing sand mold monitoring system according to claim 1, wherein the linear displacement sensor is a grating ruler or a magnetic grid ruler, the magnetic grid ruler is arranged on the motion path of the sand separator, the sand spreader and the printing trolley, and the magnetic grid ruler is connected with a central control machine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123027857 | 2021-12-06 | ||
| CN2021230278577 | 2021-12-06 |
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| Publication Number | Publication Date |
|---|---|
| CN217617596U true CN217617596U (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221640833.0U Active CN217617596U (en) | 2021-12-06 | 2022-06-28 | 3D prints sand mould monitored control system |
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| CN (1) | CN217617596U (en) |
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- 2022-06-28 CN CN202221640833.0U patent/CN217617596U/en active Active
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