CN214720570U - Powder feeding device for gradient material selective laser melting 3D printing - Google Patents
Powder feeding device for gradient material selective laser melting 3D printing Download PDFInfo
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- CN214720570U CN214720570U CN202121541539.XU CN202121541539U CN214720570U CN 214720570 U CN214720570 U CN 214720570U CN 202121541539 U CN202121541539 U CN 202121541539U CN 214720570 U CN214720570 U CN 214720570U
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Abstract
The utility model relates to a gradient material laser selective melting 3D prints and uses powder feeding device. Gradient material laser election district melts powder feeding device for 3D printing include: the device comprises a spiral feeding device, a trace powder supplementing device and a weighing device, wherein the weighing device is arranged above a feeding hole of the selective laser melting device; the first discharge port of the spiral feeding device and the second discharge port of the trace powder supplementing device are respectively arranged above the weighing device; the micro powder supplementing device comprises a vibrator, and the vibrator is used for feeding material powder into the weighing device through vibration. A gradient material laser selective melting 3D prints and uses powder feeding device have the advantage that can supply with each layer of powder according to deciding quality accurately.
Description
Technical Field
The utility model relates to a 3D prints technical field, especially relates to a gradient material laser selective melting 3D prints and uses powder feeding device.
Background
With the rapid development of scientific technology, the 3D printing method for metal parts is diversified, wherein the selective laser melting technology has the advantages of high forming precision, more complex formable structure and good mechanical property in the aspect of forming metal parts, so that the utilization rate of the selective laser melting technology in life is gradually increased, and the selective laser melting technology becomes a more common 3D printing method. The principle of the selective laser melting technology is that a high-power-density laser beam is firstly used for scanning metal powder which is already paved on a printing substrate of a forming lifting table, then the laser beam selectively melts the powder on the substrate according to the outline information of the current layer to process the outline of the current layer, then the forming lifting table descends by a distance of the thickness of a layer, then the metal powder is paved on the processed current layer, equipment is adjusted to the next layer for processing, and the layer-by-layer processing is carried out until the whole part is processed. Meanwhile, in order to avoid the reaction of the metal with other gases at high temperature, the whole processing process needs to be carried out in a forming chamber which is vacuumized or filled with protective gas.
The gradient material of the composition is a composite material formed by connecting continuously changed material components, the material characteristics of gradient transition can effectively eliminate the property difference between dissimilar materials, so that the material performance also has the gradient transition characteristics, and meanwhile, the damage caused by the mismatching of the performances when two different materials are in direct contact can be avoided, so that the gradient material has an important role in the fields of aerospace, metallurgy, medicine, mechanical manufacturing and the like.
The current selective laser melting technology is mainly used for 3D printing of single homogeneous material components, when 3D printing of gradient material components is involved, two funnels filled with different basic powder are generally needed to supply materials, and in the forming process, the two funnels respectively supply powder quantitatively and mix according to a certain proportion in real time to obtain gradient material components with a preset proportion. However, the dosing hoppers currently used for selective laser melting are usually dosed by volume: in the forming process, before forming a new layer, the forming platform descends by one layer, a certain amount of powder is discharged from the hopper, and then the powder is flatly scraped onto the forming platform by the powder paving device of the selective laser melting equipment to complete the supply and the powder paving of one layer of powder. When the hopper is adopted for quantitative powder feeding at present, the rotary motion of the rotary roller is adopted for realizing quantitative downward discharge of the powder.
In this kind of scheme, generally need to adopt more expensive servo motor to carry out the accurate positioning to the corner of changeing the roller, change and generally adopt the cell body of a plurality of equipartitions to hold the powder on the roller, when changeing the roller and rotate, when certain cell body opening up, pick up a groove powder, when changeing the roller and rotate 180 degrees, this cell body opening down, let out the powder of supplying a groove volume. The powder quantitative supply method based on the volumetric quantification can only obtain the powder quantity which is supplied according to the multiple of the volume of a single groove, and the powder supply of any volumetric quantity cannot be obtained.
Meanwhile, in the powder quantitative supply method, because the diameter of the rotating roller cannot be designed to be too large, the sizes of the groove bodies distributed on the rotating roller are small, so that generally, a layer of powder needs to be continuously rotated by the rotating roller to enable the groove bodies to sequentially and normally face downwards to realize quantitative powder discharge under the action of gravity, in the continuous rotation of the rotating roller, the time for each groove body to discharge the powder downwards cannot be too long, meanwhile, the small groove body size also causes obstacles to smooth powder discharge (the situation is more obvious on powder with poor flowability), so that practically, all the powder in each groove body cannot be discharged, and the powder supply amount is difficult to be accurate.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims at providing a gradient material selective laser melting 3D prints and uses powder feeding device, it can supply each layer of powder according to the fixed mass accurately in the selective laser melting process, has the accurate advantage of powder supply volume.
A powder feeding device for gradient material selective laser melting 3D printing comprises a spiral feeding device, a trace powder supplementing device and a weighing device, wherein the weighing device is arranged above a feeding hole of the selective laser melting device;
the first discharge port of the spiral feeding device and the second discharge port of the trace powder supplementing device are respectively arranged above the weighing device;
the micro powder supplementing device comprises a vibrator, and the vibrator is used for feeding material powder into the weighing device through vibration.
A gradient material laser selective melting 3D prints and uses powder feeding device, can be accurate according to every layer of powder of deciding quality supply.
Furthermore, the weighing equipment comprises a weighing hopper, a weight sensor and a turnover motor, wherein the turnover motor is fixedly connected with the weighing hopper; and the overturning motor is used for driving the weighing hopper to overturn when rotating, so that the weighed material powder with fixed weight is sent to the selective laser melting equipment.
Further, the weighing equipment also comprises a torsion spring and a fixed base, and the torsion spring is arranged between the weighing hopper and the fixed base.
Furthermore, the micro powder supplementing equipment comprises a funnel-shaped second powder cylinder, a wick flow channel type powder feeding nozzle and a vibrator, wherein the second powder cylinder is obliquely arranged.
Further, the vibrator includes an ultrasonic generator and an ultrasonic vibration block.
Furthermore, a first through hole is formed in the side wall of the first discharge hole, and a material powder passage is formed between the second discharge hole and the discharge hole of the spiral feeding equipment through the first through hole.
Further, the weighing device also comprises a sealing box, wherein the sealing box is used for accommodating the weighing device;
the seal box is provided with a second through hole and a third through hole; the first discharge hole is connected with the second through hole, and the feed inlet of the selective laser melting equipment is connected with the third through hole.
Further, the spiral feeding equipment comprises a first powder cylinder, a powder taking motor, a coupler and a packing auger blade shaft; a first discharge hole is formed in one side of the first powder cylinder and is positioned above the weighing device; one end of the auger blade shaft extends into the material powder of the first powder cylinder, and the other end of the auger blade shaft is connected with the powder taking motor through the coupler;
the upper part of the auger blade shaft is provided with a bearing transparent cover, a first dustproof bearing and a first shaft sleeve, the bearing transparent cover, the first dustproof bearing and the first shaft sleeve are coaxially and fixedly connected with the auger blade shaft, and the bearing transparent cover is fixedly connected with the first powder cylinder; the auger blade shaft lower extreme runs through first powder jar lower wall, auger blade shaft lower extreme is provided with bearing end cover, second dustproof bearing, second shaft sleeve, the bearing end cover the second dustproof bearing with the second shaft sleeve with the coaxial fixed connection of auger blade shaft, the bearing end cover with first powder jar lower wall fixed connection.
Further, the first powder cylinder is provided with a first upper cover; the second powder jar is provided with a second upper cover.
Further, the powder feeder also comprises a controller, and the controller is in signal connection with the spiral feeding equipment, the micro powder supplementing equipment and the weighing equipment.
For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a powder supply device for 3D printing according to the present invention, which is used for selective laser melting of gradient materials;
fig. 2 is a schematic structural diagram of a weighing apparatus of the powder supply device for 3D printing in another embodiment of the present invention, which is used for selective laser melting of gradient materials;
fig. 3 is a schematic structural diagram of a powder supply device for 3D printing according to the present invention, which is used for selective laser melting of gradient materials;
fig. 4 is a schematic structural diagram of a first powder cylinder in another embodiment of the powder supply device for 3D printing with selective laser melting of gradient materials provided by the present invention;
fig. 5 is a schematic structural diagram of a bearing and a transparent cover of the powder supply device for gradient material laser selective melting 3D printing according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a bearing and an end cap of the powder supply device for 3D printing in another embodiment of the present invention, which is used for selective laser melting of gradient materials.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present invention are shown in the drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In the following, several specific embodiments are given for describing the technical solution of the present application in detail. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
In order to solve the problem of accurate powder supply of a funnel during selective laser melting and forming of a gradient material, in a specific embodiment, as shown in fig. 1, the utility model provides a selective laser melting and 3D printing powder supply device for the gradient material, which comprises a spiral feeding device 10, a trace powder supplementing device 20 and a weighing device 30, wherein the weighing device 30 is arranged above a feeding hole 50 of the selective laser melting device; the discharge hole of the spiral feeding device 10 and the discharge hole of the trace powder supplementing device 20 are respectively arranged above the weighing device 30; the micro powder replenishing apparatus 20 includes a vibrator 22, and the vibrator 22 is used to feed the material powder into the weighing apparatus 30 by vibration.
In this embodiment, the working principle and the working flow of the powder supply device for 3D printing by selective laser melting of gradient materials are as follows:
the weight value of the material powder currently required by the selective laser melting equipment is preset.
The screw feeder apparatus 10 feeds the material powder to the weighing apparatus 30 until the weight value detected by the weighing apparatus 30 is lower than the preset weight value by 5-10g, and the screw feeder apparatus 10 stops working.
The vibrator 22 of the micro powder supplementing device 20 is started, and the material powder in the micro powder supplementing device 20 enters the weighing device 30 under the vibration action. When the weight value detected by the weighing device 30 is equal to the preset weight value, the vibrator 22 stops operating.
And at the moment, obtaining the material powder with the accurate weight currently required by the selective laser melting equipment, and adding the material powder into the selective laser melting equipment to finish accurate powder supply.
As shown in fig. 2, in order to realize that the material powder is automatically added into the selective laser melting device by the weighing device, in a preferred embodiment, the weighing device 30 comprises a weighing hopper 31, a weight sensor 32 and a turnover motor 33, wherein the turnover motor 33 is fixedly connected with the weighing hopper 31; when the turning motor 33 is used for rotating, the weighing hopper 31 is driven to turn, so that the weighed material powder with fixed weight is sent to the selective laser melting equipment.
In this embodiment, the weighing hopper 31 is disposed above the feeding port 50 of the selective laser melting device, and after the material powder with an accurate weight value is weighed, the turning motor 33 is started, and the turning motor 33 rotates to drive the weighing hopper 31 to turn, so that the weighing hopper 31 pours the material powder into the selective laser melting device.
Preferably, the weighing hopper 31 is approximately funnel-shaped, so as to receive the material powder conveyed by the screw feeder device 10 and the micro powder supplementing device 20; on the other hand, the inverted funnel shape also facilitates pouring of the powder without residue when it is turned over by the turning motor 33.
In another preferred embodiment, to achieve automatic homing of the weighing hopper 31 after it is turned over, the weighing apparatus 30 further comprises a torsion spring 34 and a fixed base.
The torsion spring is a mechanical force storage structure, and converts mechanical energy into elastic potential energy of the torsion spring by twisting or rotating an elastic material with soft material and high toughness; when the external force disappears, the torsion spring automatically restores the original shape, so that the elastic potential energy is converted into mechanical energy.
In this embodiment, the torsion spring 34 is disposed between the weighing hopper 31 and the fixing base, and when the flipping motor 33 rotates to flip the weighing hopper 31, the torsion spring 34 is twisted to generate elastic potential energy. When the turnover motor 33 stops working and the external force disappears, the torsion spring 34 automatically restores to the original state, thereby converting the elastic potential energy into mechanical energy to drive the weighing hopper 31 to turn back to the initial position.
Preferably, the weighing device in this embodiment further includes a rotary damper 36, and the rotary damper 36 is connected to the weighing bucket 31, and is used for relieving sudden change impact of resilience of the torsion spring 34 on the weighing bucket 31 when the weighing bucket is reset, so that the weighing bucket 31 obtains gentle mechanical motion during overturning, and the weighing bucket 31 is prevented from being overturned too fast under the action of the elasticity of the torsion spring 34 to cause a failure, which is helpful for improving the quality and the service life of the weighing device.
Preferably, the present embodiment includes two torsion springs 34 and two rotary dampers 36, which are oppositely disposed on two sides of the weighing hopper 31, and cooperate together to ensure the smoothness and stability of the overturning process of the weighing hopper 31.
In another preferred embodiment, to achieve accurate powder replenishment of the micro powder replenishment device 20, the micro powder replenishment device 20 includes a funnel-shaped powder cylinder, a wick flow path type powder feeding nozzle 212, and a vibrator 22, the powder cylinder being placed obliquely. Upon activation of the vibrator 22, the powder material in the jar falls under vibration and gravity through the wick flow nozzle 212 into the weighing apparatus.
Preferably, the vibrator 22 is an ultrasonic vibrator block driven by an ultrasonic generator (not shown) electrically connected thereto to generate ultrasonic vibrations of a specific amplitude and frequency.
In the prior art, because the selective laser melting mostly adopts 200-500-mesh fine powder as a molding material, if the fit clearance is too small, the roller is easy to be blocked, so a proper fit clearance is generally required to be arranged between the roller and the funnel, but if the fit clearance is too large, fine powder particles are easy to leak from the fit clearance, the inaccuracy of powder supply is further increased, and due to the existence of the fit clearance, the roller type powder supply device has the condition that air is easy to enter a molding chamber to cause the oxidation of a metal part molding process.
In order to solve the above technical problem that the air enters the forming chamber to cause the oxidation in the forming process of the metal part, in a preferred embodiment, the utility model provides a powder supply device for 3D printing is melted in selective area of gradient material laser still includes seal box 40.
In this embodiment, the side wall of the discharge hole of the spiral feeding device 10 is provided with a first through hole 142, and the discharge hole of the micro powder supplementing device 20 and the discharge hole of the spiral feeding device 10 form a material powder passage through the first through hole 142.
The weighing device 30 is accommodated in the seal box 40, and meanwhile, the seal box 40 is provided with a second through hole and a third through hole; the discharge hole of the spiral feeding equipment 10 is connected with the second through hole, and the feed inlet 50 of the selective laser melting equipment is connected with the third through hole.
Preferably, the first powder cylinder 11 of the screw feeder apparatus 10 and the second powder cylinder 21 of the micro powder replenishing apparatus 20 are provided with a first upper cover 113 and a second upper cover 211, respectively.
Preferably, the spiral feeding equipment 10 comprises a first powder cylinder 11, a powder taking motor 13, a shaft coupling and a packing auger blade shaft 12; a first discharge hole 14 is formed in one side of the powder cylinder, and the discharge hole is positioned above the weighing equipment; one end of the auger blade shaft 12 extends into the material powder of the first powder cylinder 11, and the other end is connected with the powder taking motor 13 through the coupler; the powder taking motor 13 is electrically connected with the controller, and rotates or stops rotating under the control of the controller to drive the auger blade shaft 12 to convey material powder to the weighing hopper 31;
the upper part of the auger blade shaft 12 is provided with a bearing transparent cover 124, a first dustproof bearing 122 and a first shaft sleeve 123, the bearing transparent cover 124, the first dustproof bearing 122 and the first shaft sleeve 123 are coaxially and fixedly connected with the auger blade shaft 12, and the bearing transparent cover 124 is fixedly connected with the first powder cylinder 11; the auger blade shaft 12 lower extreme runs through 11 lower walls of first powder jar, auger blade shaft 12 lower extreme is provided with bearing cap 127, second dust bearing 125, second shaft sleeve 126, bearing cap 127 second dust bearing 125 with second shaft sleeve 126 with the coaxial fixed connection of auger blade shaft 12, bearing cap 127 with 11 lower walls fixed connection of first powder jar.
In this embodiment, the whole material powder conveying path is closed, and the first upper cover 113 and the second upper cover 211 are covered after the material powder is added into the first powder cylinder 11 of the screw feeder 10 and the second powder cylinder 21 of the micro powder supplying device 20, so that the external air can be prevented from entering.
In order to realize the automatic control of powder supply, in a preferred embodiment, the utility model provides a gradient material laser election district melts powder feeding device for 3D printing still includes the controller, and the controller is connected with weight sensor 32, gets powder motor 13, vibrator 22 and upset motor 33 electricity or signal connection for through the weight value of the material powder that the induction weight sensor 32 weighed, control the start or stop of getting powder motor 13, the vibration or the stop of vibrator 22, the start or the stop of upset motor 33.
The controller is a master device for controlling the starting, speed regulation, braking and reversing of the motor by changing the wiring of a main circuit or a control circuit and changing the resistance value in the circuit according to a preset sequence. The system consists of a program counter, an instruction register, an instruction decoder, a time sequence generator and an operation controller, and is a decision mechanism for issuing commands, namely, the decision mechanism is used for coordinating and commanding the operation of the whole computer system.
Preferably, the controller is used together with an electronic computer, is externally connected with a display device, an input device and an output device, facilitates manual setting of control logic and control parameters, and facilitates observation of the working condition of the powder supply device by workers.
In summary, as shown in fig. 2 to 6, the preferred embodiment of the powder supply device for 3D printing with selective laser melting of gradient materials provided by the present invention is as follows:
comprises a spiral feeding device 10, a micro powder supplementing device 20, a weighing device 30 and an external controller (not shown). Preferably, the weighing device 30 is fixedly arranged in the seal box 40 above the feeding weighing device port 50 of the selective laser melting device, and a third through hole at the bottom of the seal box 40 is sleeved on the feeding port 50 of the selective laser melting device; the spiral feeding device 10 is arranged on the right side of the weighing device 30, a discharge hole of the spiral feeding device 10 is positioned above the weighing device 30, and the spiral feeding device is connected with the sealing box 40 through a second through hole in the sealing box 40; the micro powder supplementing device 20 is arranged above the left side, and a discharge hole of the micro powder supplementing device 20 extends into the discharge hole of the spiral feeding device 10 through a first through hole 142 on the side wall of the discharge hole of the spiral feeding device 10.
The weighing device 30 comprises a weighing bucket 31, a weight sensor 32, a turnover motor 33, a torsion spring 34, a seal box 40 and relevant parts. The weight sensor 32 is installed in the hermetic container 40 by means of screws and fixing blocks for sensing a weight value of the material powder added to the weighing apparatus 30. An overturning support seat 35 is arranged in the seal box 40, and the weight sensor 32 is connected with the overturning support seat 35. The overturning support seat 35 is provided with a damper fixing position 351, a limiting bayonet position 352 and a spring fixing groove 353, the limiting bayonet position 352 is located right below the concave position of the weighing hopper 31, and the left and right sides of the weighing hopper 31 are provided with short shafts, namely a first short shaft 354 and a second short shaft 355. The first overturning support seat 35 is provided with a rotary damping end cover 361, the second overturning support seat 35 is provided with a rotary damping transparent cover 362, and meanwhile, the torsion spring 34 is fixed on the short shaft through an on-shaft spring fixing hole of the short shaft and a fixing notch on the overturning support seat 35 and is used together with a limiting bayonet 352 on the overturning support seat 35 to mechanically limit the weighing hopper 31. The second short shaft 355 is connected with the turnover motor 33 through a coupler, the turnover motor 33 drives the weighing hopper 31 to turn over to discharge powder, then the motor is powered off, and the weighing hopper 31 is stably and mechanically reset to the limiting bayonet under the combined action of the torsion spring 34 and the rotary damper 36. The turnover motor 33 is electrically connected with the controller, and the rotation of the turnover motor 33 can be realized through the controller, so that the control of discharging powder in real time is realized. Preferably, the sealing box 40 is made of organic glass, so that the working condition of the internal components can be observed conveniently.
The micro powder supplementing device 20 comprises a second powder cylinder 21, a vibrator 22 in the form of an ultrasonic vibration block, an ultrasonic generator electrically connected with the vibrator 22 in the form of an ultrasonic vibration block, and a second upper cover 211, wherein the second powder cylinder 21 is formed by glass in a blow molding manner and is funnel-shaped, the upper port of the second upper cover 211 is provided with the second glass cover 211, the amount of powder in the second powder cylinder 21 can be observed through the second glass cover 211, meanwhile, the second glass cover 211 is provided with a screw hole, the second glass cover is in threaded connection with a powder adding screw cap through a pipe thread, and the powder adding screw cap is unscrewed, so that powder can be added into the second powder cylinder 21; the second powder cylinder 21 ends with a powder feeding nozzle with a flow passage like a wick when the candle burns, and the wick flow passage type powder feeding nozzle 212 is obliquely inserted into the first discharge hole 14 through a powder compensation notch on the first discharge hole 14; the second powder cylinder 21 is fixedly arranged above the seal box 40 through a support plate; the vibrator 22 in the form of an ultrasonic vibration block is installed at the outer side of the second powder cylinder 21, the generation and amplitude of vibration thereof is controlled by an ultrasonic generator, and the ultrasonic generator is electrically connected with a controller, so that the controller can control the power on or off of the ultrasonic generator through signals to realize the vibration or stop of the vibrator 22 in the form of an ultrasonic vibration block.
The using method of the quantitative powder supply device comprises the following using steps:
raw material powder of a workpiece to be processed is filled in the first powder cylinder 11 and the second powder cylinder 21, the first upper cover 113 and the second upper cover 211 are covered to prevent external air from entering, then the powder taking motor 13 is started, the powder taking motor 13 rotates, the auger blade shaft 12 is driven by the powder taking motor coupler 131 to drive metal material powder to be upwards conveyed to the first discharge port 14, and the metal material powder is conveyed to the weighing hopper 31 along the first discharge port 14 to be weighed. When the weighing device 30 detects that the mass of the weighed material is 5-10g different from the mass of the required material specified by the specification, the powder taking motor 13 stops rotating. After the material quality detected by the weighing device 30 is stable, the ultrasonic generator is started, the vibrator 22 in the form of an ultrasonic vibration block vibrates to enable the material powder particles in the second powder cylinder 21 to shake and move, and in combination with the gravity action, part of the material powder particles overcome the friction resistance with the inner wall surface of the flow channel of the candle wick flow channel type powder feeding nozzle 212 and other particles, fall into the weighing hopper 31 through the powder discharging nozzle, and realize gradual micro-compensation addition of the material powder to the weighing hopper 31. When the weighing device 30 detects that the weighed material is substantially consistent with the required material, the controller controls the vibrator 22 in the form of an ultrasonic vibration block to stop working, the turnover motor 33 is operated to turn over the weighing hopper 31, and the weighed metal material powder enters the feeding hole 50 of the selective laser melting device. Then the turning motor 33 is powered off, the weighing hopper 31 is stably and mechanically reset to the limiting bayonet under the combined action of the torsion spring 34 and the rotary damper 36, and thus, the precise powder supply process is completed.
Different with the funnel ration powder feeding method that the tradition adopted rotary motion, the utility model discloses a coarse adjusting of spiral feeding equipment + the fine tuning of trace powder supplementing equipment for compare in the tradition have had great promotion in the funnel ration powder feeding precision based on the rotary motion principle. Meanwhile, a low-cost stepping motor is adopted, and a simple clamp spring device with a rotary damper is combined, so that the powder discharging device can be turned over and accurately positioned, and the powder discharging device has the characteristics of cost saving and accurate positioning. In addition, the device is based on a spiral mechanism feeding principle and an ultrasonic vibration driving powder fluidization principle, can adopt a simple mechanism modularized design, can keep a larger fit clearance, is not easy to leak powder and clamp the powder, reduces the machining precision requirement of device parts, and saves the machining cost of the device. Meanwhile, the device adopts a sealing arrangement, so that air is effectively prevented from entering a forming chamber, and the condition of oxidation in the forming process of metal parts is effectively avoided.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. The utility model provides a gradient material laser selective melting 3D prints and uses powder feeding device which characterized in that:
the automatic powder feeding device comprises a spiral feeding device, a trace powder supplementing device and a weighing device, wherein the weighing device is arranged above a feeding hole of a selective laser melting device;
the first discharge port of the spiral feeding device and the second discharge port of the trace powder supplementing device are respectively arranged above the weighing device;
the micro powder supplementing device comprises a vibrator, and the vibrator is used for feeding material powder into the weighing device through vibration.
2. The powder feeding device for gradient material laser selective melting 3D printing according to claim 1, characterized in that:
the weighing equipment comprises a weighing hopper, a weight sensor and a turnover motor, and the turnover motor is fixedly connected with the weighing hopper; and the overturning motor is used for driving the weighing hopper to overturn when rotating, so that the weighed material powder with fixed weight is sent to the selective laser melting equipment.
3. The powder feeding device for gradient material laser selective melting 3D printing according to claim 2, characterized in that:
the weighing equipment further comprises a torsion spring and a fixed base, and the torsion spring is arranged between the weighing hopper and the fixed base.
4. The powder feeding device for gradient material laser selective melting 3D printing according to claim 1, characterized in that:
the micro powder supplementing equipment comprises a funnel-shaped second powder cylinder, a wick flow channel type powder feeding nozzle and a vibrator, wherein the second powder cylinder is obliquely arranged.
5. The powder feeding device for gradient material laser selective melting 3D printing according to claim 4, characterized in that:
the vibrator comprises an ultrasonic generator and an ultrasonic vibration block.
6. The powder feeding device for gradient material laser selective melting 3D printing according to claim 1, characterized in that:
the side wall of the first discharge hole is provided with a first through hole, and the second discharge hole and the discharge hole of the spiral feeding equipment form a material powder passage through the first through hole.
7. The powder feeding device for gradient material laser selective melting 3D printing according to claim 6, characterized in that:
the sealing box is used for accommodating the weighing equipment;
the seal box is provided with a second through hole and a third through hole; the first discharge hole is connected with the second through hole, and the feed inlet of the selective laser melting equipment is connected with the third through hole.
8. The powder feeding device for gradient material laser selective melting 3D printing according to claim 1, characterized in that:
the spiral feeding equipment comprises a first powder cylinder, a powder taking motor, a coupler and a packing auger blade shaft; a first discharge hole is formed in one side of the first powder cylinder and is positioned above the weighing device; one end of the auger blade shaft extends into the material powder of the first powder cylinder, and the other end of the auger blade shaft is connected with the powder taking motor through the coupler; the upper part of the auger blade shaft is provided with a bearing transparent cover, a first dustproof bearing and a first shaft sleeve, the bearing transparent cover, the first dustproof bearing and the first shaft sleeve are coaxially and fixedly connected with the auger blade shaft, and the bearing transparent cover is fixedly connected with the first powder cylinder; the auger blade shaft lower extreme runs through first powder jar lower wall, auger blade shaft lower extreme is provided with bearing end cover, second dustproof bearing, second shaft sleeve, the bearing end cover the second dustproof bearing with the second shaft sleeve with the coaxial fixed connection of auger blade shaft, the bearing end cover with first powder jar lower wall fixed connection.
9. The powder feeding device for gradient material laser selective melting 3D printing according to claim 8, characterized in that:
the first powder cylinder is provided with a first upper cover; the second powder jar is provided with a second upper cover.
10. A gradient material laser selective melting 3D printing powder supply device according to any one of claims 1-9, characterized in that:
the powder feeding device is characterized by further comprising a controller, and the controller is in signal connection with the spiral feeding device, the micro powder supplementing device and the weighing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121541539.XU CN214720570U (en) | 2021-07-07 | 2021-07-07 | Powder feeding device for gradient material selective laser melting 3D printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121541539.XU CN214720570U (en) | 2021-07-07 | 2021-07-07 | Powder feeding device for gradient material selective laser melting 3D printing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214720570U true CN214720570U (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121541539.XU Active CN214720570U (en) | 2021-07-07 | 2021-07-07 | Powder feeding device for gradient material selective laser melting 3D printing |
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| Country | Link |
|---|---|
| CN (1) | CN214720570U (en) |
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2021
- 2021-07-07 CN CN202121541539.XU patent/CN214720570U/en active Active
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