CN103738747A - Movable hopper type powder bed powder laying device and method - Google Patents
Movable hopper type powder bed powder laying device and method Download PDFInfo
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- CN103738747A CN103738747A CN201310690965.3A CN201310690965A CN103738747A CN 103738747 A CN103738747 A CN 103738747A CN 201310690965 A CN201310690965 A CN 201310690965A CN 103738747 A CN103738747 A CN 103738747A
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Abstract
The invention discloses a movable hopper type powder bed powder laying device. The powder bed powder laying device mainly comprises a feeding device, a movable (discharging) funnel, a powder laying device, a related transmission mechanism device and the like. The amount of powder needed by each layer is calculated, and the feeding device is controlled to accurately feed the powder to the movable funnel by using a powder level sensor in the movable funnel. The powder is discharged rapidly and evenly through control over left-and-right moving speed of the discharging funnel, the bore diameter of a discharging opening and the opening and closing degree of the discharging opening, and then the discharged powder is slicked through front and back movement of a powder slicking plate to finish the powder laying process. The powder is discharged rapidly and evenly, the usage amount of the powder is saved, the machining efficiency of rapid forming equipment is increased, and cost is reduced.
Description
Technical field
The invention discloses a kind of mobile hopper-type powder bed power spreading device, this device can be used for increasing in material manufacturing technology.
Background technology
Increase material manufacture (Additive Manufacturing, AM) technology claims again rapid shaping technique, being to adopt the method that adds up gradually of material to manufacture the technology of entity component, with respect to traditional material removal-Machining Technology for Cutting, is the manufacture method of a kind of " from bottom to top ".Increase material manufacturing technology at present and become the study hotspot of Rapid Manufacturing Technology.Need not according to forming principle and implementation, current increasing material manufacturing technology is mainly divided into following several method: selective laser sintering (Selective Laser Sintering, SLS), selective laser melts (Selective Laser Melting, SLM), profile inefficacy method (Profile Invalidation Laser Rapid Prototyping, PIRP), stereolithography (Stereo lithography Apparatus, be called for short SLA method), laminated solid body manufacturing process (Laminated Object Manufacturing, LOM) and Fused Deposition Modeling method (Fused Deposition Manufacturing, FDM).
Wherein SLS, SLM, PIRP, LOM etc. increase process conventional in material manufacture field mostly based on powder bed (moulding cylinder body) technique manufacture.Increasing manufacture process based on powder bed has the outstanding advantages such as formed precision is high, design of part degree of stability is high, plastic complex structure.As the important module in rapid shaping technique technique, speed and the quality of stability, particularity and the continuity of power spreading device on rapid shaping has important impact, and the mode of paving powder also has tremendous influence to the degree of utilization of shaping efficiency and raw material with paving powder speed.To sum up, power spreading device is the key component in rapid forming equipment.Existing paving powder mode has parallel hopper paving powder, roll-type paving powder, trolley type paving powder, material cylinder formula paving powder.The power spreading device of current rapid shaping mechanism is mostly with upper type.
The subject matter of prior art is:
(1) parallel hopper, dolly etc. spread in powder mode, and powder feeding homogeneity cannot accurately guarantee.
In the implementation procedure of above-mentioned paving powder mode, powder first falls into the hopper of former both sides.Before processing, there is the parallel dolly of a constant volume and move to below hopper by programming control, hopper unloads the powder of general amount afterwards.Last dolly skims over moulding cylinder body processing breadth in a certain direction.Below dolly, there is feed opening, in the process moving at dolly, complete paving powder.In order to spread the stability of powder, each hopper discharge quantity is all measured more than the husky practicality of paving of this one deck.In this process, owing to cannot accomplishing accurate control in hopper discharge process, part powder is wasted, and because the feed opening area of dolly is large, cannot accomplishes that each and every one the blanking amount in orientation is identical.
(2) design of middle hopper structure increases equipment mechanism complexity, and processing technology complexity and fugitiveness increase.
In existing feed system, mostly comprise powder box, be parallel to the middle hopper (parallel material cylinder) of former, paving powder materials cylinders (dolly).Feeding process is also the complexity that the equipment of middle hopper equipment has increased processing technology, but does not strengthen applicability, due to the increase of technological process quantity, the fugitiveness in Rapid Prototyping Process is increased.
(3) increase the probability that raw material bonds, be unfavorable for stability, the continuity of the course of processing.
In the time of processing, middle hopper can be stored a large amount of powders.Owing to receiving the impact of processing environment condition, can there is the probability being bonded together in powder in storing process.In the course of processing, if powder is bonded together, processing cannot normally move continuously, affects work efficiency.
Summary of the invention
Technical matters to be solved by this invention is the deficiency existing for the above-mentioned existing technical matters having and a kind of device that can realize stable accurately paving powder process providing, and power spreading device is simple in structure, is convenient to dismounting, portable strong; Adopt this device paving powder, paving powder is quick, and reliability is high, can reduce the paving powder time and greatly reduce powder consumption, thereby improving shaping efficiency and stock utilization.
The invention provides a kind of mobile hopper-type powder bed power spreading device, this device comprises material storing box, feeding device, flexible duct, hopper, motion work and rigidity scraper plate.
Material storing box, for depositing the raw MAT'L mixing, discharging opening is arranged at material storing box bottom, and by its aperture of valve control of discharging opening, discharging opening connects flexible duct, for transmitting powder.
Feeding device, is positioned over the upper end of equipment, and the inlet point of feeding device is connected with the discharging opening of material storing box by flexible duct, and the powder that feeding device can be deposited material storing box the inside be transported to equipment top.
Hopper, the fixing upper level sensor of inwall and lower two level sensors of hopper, the axis of two level sensors can overlap, and makes loading and unloading level sensor on same axis, can certainly divide and be arranged, and uses the two axis parallel.The upper-lower position of two level sensors is adjustable, as the locating point of powder amount upper limit and lower limit.The bottom of hopper is porose, and as discharge port, this discharge port is by the solenoid control opening degree being fixed in the above.
Motion work, hopper is fixed on motion slide unit, realizes the variable-speed motion of left and right directions under the drive of motor.
Rigidity scraper plate, strikes off and is paved with whole finished surface for the material that hopper is fallen.Scraper plate is connected and fixed by motion work, can move forward and backward.
In the course of processing, when the height of materials of hopper is during lower than lower level sensor, lower level sensor sends signal, controls feeding device and starts working, and the powder of material storing box is transported to feeding device the inside and directly falls into hopper by the discharge port below it.Feeding device continuous firing, until the powder height in hopper is higher than the height of upper level sensor.Feeding device quits work, and hopper starts to the other end, to do variable-speed motion from one section.In motion process, the discharge port of feed hopper bottom is by the variation of its aperture of solenoid control.By the variation of mobile hopper speed and the variation of hopper loading and unloading material mouth aperture, realize Quick uniform powder feeding, then seesaw and realize powder and pave by rigidity scraper plate.
The present invention compared with prior art has following characteristics:
1. powder feeding mechanism manufacturability is stable, and the powder feeding mechanism of this equipment, without middle hopper, has reduced time and the process of material transferring, has increased the stability of continuous processing technology;
2. the upper and lower adjustable level sensor device of powder feeding hopper can make the powder amount of funnel the inside dynamically adjust according to different technology conditions, and the material content of hopper the inside can just in time equal the powder amount of the processing breadth of this layer.Both save the powder feeding time, effectively improved again raw-material service efficiency.
3. send point process because efficiency is high, the time is short, can effectively reduce powder because ambient temperature causes the probability of bonding, can make rapid forming equipment continous-stable in the time of processing, improved production efficiency.
4. such separating device that send is simple in structure, can dismantle at any time to replace and use, and has increased the practicality of this dust feeder.
Accompanying drawing explanation
Fig. 1 a moves paving powder structure general diagram.
Fig. 1 b moves paving powder structure birds-eye view.
The hopper outer wall construction figure that Fig. 2 a moves.
The hopper inner-cavity structure figure that Fig. 2 b moves.
Hopper position view during the powder feeding of Fig. 3 a material loading.
Material level schematic diagram in Fig. 3 b material loading front hopper.
Material level schematic diagram in Fig. 3 c material loading rear hopper.
Fig. 4 is mobile hopper paving powder process schematic diagram.
Fig. 5 is that rigidity scraper plate strikes off driving surface process schematic diagram.
In figure: 1 material storing box; 2 flexible ducts; 3 feeding devices; 4 hoppers; 5 processing planes; 6 scraper plates; Level sensor on 7; 8 times level sensors; 9 electromagnetic valve switch; The discharge port of 10 hoppers.
The specific embodiment
Now tie technical scheme and accompanying drawing describes specific embodiments of the invention in detail, the present invention is further described.
The present embodiment, narrates in conjunction with rapid forming equipment, and protection of the present invention is not limited only to this.
1,, before rapid forming equipment operation, by part C AD figure, machine-shaping cylinder body cross-sectional area and bed thickness, determined the bulking value of every one deck powder.In order to instruct the opening degree of level sensor position in hopper, the kinematic velocity of controlling mobile hopper and feed hopper bottom discharging opening.The height of adjusting loading and unloading level sensor in hopper, makes the following partial volume of lower level sensor be more than or equal to individual layer powder demand, and the distance between loading and unloading level sensor is unsuitable excessive, prevents accumulated powder bonding.
When 2, initial, hopper is positioned at initial point A position, A position be feeding device 3 discharge ports under, discharging opening 10 is in closed state.If the powder height in hopper lower than lower level sensor 8 position H1(as Fig. 3 b), sensor 8 can be issued control system signal, control system control feeding device 3 work that brings into operation.The powder of material storing box is transported to feeding device inner chamber by transport pipeline 2, by discharge port blanking in mobile hopper 4.Feeding device 3 continuous firings, until the position H2(that in hopper, powder height exceedes level sensor 7 as Fig. 3 c).
3, upper level sensor 7 can send signal to control system, and control system stops feeding device 3 and works.Mobile hopper 4 starts to B, to do variable-speed motion by A, and electromagnetic valve 9 is controlled mobile feed hopper bottom discharging opening 10 and opened certain angle (as shown in Figure 4) simultaneously.Powder is unloaded falls processing plane.By calculating the kinematic velocity of mobile material cylinder with the relation of powder height in material cylinder, in order to control the kinematic velocity of mobile hopper 4 and the opening degree of discharging opening 10, make to spread powder enough evenly.
4, hopper can be selected to carry out one-stroke paving powder or back and forth be spread powder, and hopper 4 can complete the paving powder task of whole finished surface when from A to B, and after B point, electromagnetic valve 9 is closed completely, and now the opening degree of blanking port 10 is 0.Mobile hopper returns to A point afterwards, in way, does not spread powder.Can also be in the process of A-B-A, the opening degree of blanking port is greater than 0 all the time, all carries out blanking in whole process.
5, mobile hopper 4 is got back to after A point, and scraper plate 6 moves along C-D direction, and scraper plate bottom surface can be unloaded hopper 4 powder falling and be paved and wait individual processing plane 5, completes the husky process that spreads.
If the powder amount of 6 hopper 4 the insides is not less than lower level sensor position, upper, once spread before powder, do not carry out feeding process, otherwise will carry out material loading by step 2.
Claims (5)
1. a mobile hopper-type powder bed power spreading device, is characterized in that, this moves hopper-type powder bed power spreading device and comprises:
Material storing box, for depositing the raw MAT'L mixing, discharging opening is arranged at material storing box bottom, and by its aperture of valve control of discharging opening, discharging opening connects flexible duct, for transmitting powder;
Feeding device, is arranged at the upper end of equipment, and the inlet point of feeding device is connected with the discharging opening of material storing box by flexible duct, and the powder that feeding device is deposited material storing box the inside is transported to equipment top;
Hopper, the inwall of hopper is fixed two level sensors: the upper-lower position of two level sensors is adjustable, as the locating point of powder amount upper limit and lower limit; The bottom of hopper is porose, and as discharge port, this discharge port is by the solenoid control opening degree being fixed in the above;
Motion work, hopper is fixed on motion slide unit, realizes the variable-speed motion of left and right directions under the drive of motor;
Rigidity scraper plate, strikes off and is paved with whole finished surface for the material that hopper is fallen; Scraper plate is connected and fixed by motion work, can move forward and backward.
2. the mobile hopper-type powder of one according to claim 1 bed power spreading device, is characterized in that, described upper level sensor and the axis of lower level sensor overlap, and make loading and unloading level sensor on same axis.
3. the mobile hopper-type powder of one according to claim 1 bed power spreading device, is characterized in that, dividing of described upper level sensor and lower level sensor is arranged, and the two axis is parallel.
4. right to use requires the method for a kind of mobile hopper-type powder bed power spreading device described in 1,2 or 3, it is characterized in that following steps:
Before A, processing, by CAD, scheme and raw-material kind is determined single berth powder thickness, determine level sensor position;
B, in the course of processing, when the powder height of hopper is during lower than lower level sensor, lower level sensor sends signal, and control program control feeder is started working, and the powder of material storing box is transported to feeding device the inside and directly falls into hopper by the discharge port below it;
C, feeding device continuous firing, until the powder height in hopper is higher than the height of upper level sensor; Feeding device quits work;
D, hopper start from one end to the other side to do variable-speed motion; In motion process, the discharge port of feed hopper bottom is by the variation of its aperture of solenoid control; By the variation of mobile hopper speed and the variation of feed hopper bottom discharge port aperture, realize Quick uniform powder feeding;
E, rigidity scraper plate are realized powder perpendicular to the motion of hopper sense of motion and are paved.
5. method according to claim 4, is characterized in that, the discharge port aperture of mobile hopper, along with powder height in hopper and kinematic velocity capable of dynamic regulate, realizes uniform spreading powder.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104097804A (en) * | 2014-07-16 | 2014-10-15 | 凯迈(洛阳)机电有限公司 | Feeding device and feeding method for particle material packaging machine controlled by PLC (programmable logic controller) |
| CN104209268A (en) * | 2014-08-15 | 2014-12-17 | 成都宏源铸造材料有限公司 | Vibrating sieve material storage barrel |
| CN105197457A (en) * | 2014-06-04 | 2015-12-30 | 天津立坤石油技术服务有限公司 | Powder conveying hopper |
| CN105522149A (en) * | 2014-10-21 | 2016-04-27 | 株式会社沙迪克 | Lamination molding apparatus |
| CN108584862A (en) * | 2018-05-03 | 2018-09-28 | 南通大学 | A kind of pillow filler material bottle placer |
| WO2018176857A1 (en) * | 2017-03-29 | 2018-10-04 | 广船国际有限公司 | Device for spreading filler material on bevel |
| CN109371264A (en) * | 2018-09-05 | 2019-02-22 | 北京科技大学 | A kind of continually changing alloy sample high throughput preparation method of chemical composition content |
| FR3087139A1 (en) | 2018-10-16 | 2020-04-17 | Addup | ADDITIVE MANUFACTURING MACHINE COMPRISING A MOBILE AND REGULATED POWDER DISPENSING |
| CN111805907A (en) * | 2019-03-25 | 2020-10-23 | 广东汉邦激光科技有限公司 | Movable feeding system and feeding method |
| FR3096284A1 (en) | 2019-05-24 | 2020-11-27 | Addup | Additive manufacturing machine with powder distribution by sieving. |
| CN112960291A (en) * | 2021-02-26 | 2021-06-15 | 中国水利水电第九工程局有限公司 | Discharge hopper for machine-made sand shell breaking, core keeping and desliming process |
| US11225022B2 (en) | 2018-01-25 | 2022-01-18 | Hewlett-Packard Development Company, L.P. | Build material dispensing device |
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| CN105197457A (en) * | 2014-06-04 | 2015-12-30 | 天津立坤石油技术服务有限公司 | Powder conveying hopper |
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| CN105522149A (en) * | 2014-10-21 | 2016-04-27 | 株式会社沙迪克 | Lamination molding apparatus |
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| US11225022B2 (en) | 2018-01-25 | 2022-01-18 | Hewlett-Packard Development Company, L.P. | Build material dispensing device |
| US11607849B2 (en) | 2018-01-25 | 2023-03-21 | Hewlett-Packard Development Company, L.P. | Build material dispensing device |
| CN108584862A (en) * | 2018-05-03 | 2018-09-28 | 南通大学 | A kind of pillow filler material bottle placer |
| CN108584862B (en) * | 2018-05-03 | 2020-03-31 | 南通大学 | Pillow core filler liquid filling machine |
| CN109371264A (en) * | 2018-09-05 | 2019-02-22 | 北京科技大学 | A kind of continually changing alloy sample high throughput preparation method of chemical composition content |
| FR3087139A1 (en) | 2018-10-16 | 2020-04-17 | Addup | ADDITIVE MANUFACTURING MACHINE COMPRISING A MOBILE AND REGULATED POWDER DISPENSING |
| CN112839756A (en) * | 2018-10-16 | 2021-05-25 | Addup公司 | Additive manufacturing apparatus with movable, controllable powder dispensing |
| CN112839756B (en) * | 2018-10-16 | 2023-02-24 | Addup公司 | Additive manufacturing apparatus with movable, controllable powder dispensing |
| WO2020089538A1 (en) | 2018-10-16 | 2020-05-07 | Addup | Additive manufacturing machine with movable, controlled powder dispensing |
| US11969791B2 (en) | 2018-10-16 | 2024-04-30 | Addup | Additive manufacturing machine with movable, controlled powder dispensing |
| CN111805907A (en) * | 2019-03-25 | 2020-10-23 | 广东汉邦激光科技有限公司 | Movable feeding system and feeding method |
| FR3096284A1 (en) | 2019-05-24 | 2020-11-27 | Addup | Additive manufacturing machine with powder distribution by sieving. |
| WO2020239553A1 (en) | 2019-05-24 | 2020-12-03 | Addup | Additive manufacturing machine with powder dispensing by sieving |
| CN112960291A (en) * | 2021-02-26 | 2021-06-15 | 中国水利水电第九工程局有限公司 | Discharge hopper for machine-made sand shell breaking, core keeping and desliming process |
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