CN107626924A - A kind of selective laser melting unit - Google Patents
A kind of selective laser melting unit Download PDFInfo
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- CN107626924A CN107626924A CN201711055884.0A CN201711055884A CN107626924A CN 107626924 A CN107626924 A CN 107626924A CN 201711055884 A CN201711055884 A CN 201711055884A CN 107626924 A CN107626924 A CN 107626924A
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- scraper
- milling cutter
- selective laser
- laser melting
- melting unit
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Abstract
The invention discloses a kind of selective laser melting unit, including rigid power spreading device, milling cutter topping machanism and control device；The rigid power spreading device includes scraper mechanism, guide rail mechanism, actuating unit and overload current testing agency, and actuating unit drives scraper mechanism to be moved along guide rail mechanism, and overload current testing agency is arranged in scraper mechanism and is connected with control device；The milling cutter topping machanism includes mechanical arm and milling cutter；Control device is used for the detection information for receiving and analyzing the transmission of overload current testing agency, and realizes excision high point action according to detection information control machinery arm and milling cutter.The present invention was scraped by force during powdering by the rigidity of scraper to high point, if high point is cut away by scraper, powdering action smoothly completes；If scraper by card, by the monitoring of overload current detection means and the stock removal action of milling cutter topping machanism, realizes the cutting to high point, ensure that in process be not in high point, substantially reduce part defect rate, improve element precision.
Description
Technical field
The present invention relates to selective laser smelting technology field, more particularly to a kind of selective laser melting unit.
Background technology
Increasing material manufacturing (Additive Manufacturing, AM) technology is that the method manufacture gradually to be added up using material is real
The technology of body part, it is the manufacture method of a kind of " from bottom to top " relative to traditional material removal-Machining Technology for Cutting.Swash
Light selective melting (Selective Laser Melting, SLM) directly manufacturing technology is also known as metal 3D printing technique, is to increase material
The cutting edge technology of manufacture.Before processing, first by expert data handle software by the CAD model of part cut into slices it is discrete with
And the necessary supporting construction of addition, scanning pattern is then planned, the data after processing are by comprising can control what laser beam moved
Profile information.Then this data is imported into former, computer successively calls in profile information, and control scanning galvanometer carries out inclined
Turn, realize laser facula optionally fusing metal powder, be bonded as one with previous layer material, and the area not being irradiated with a laser
Powder is in still fluffy in domain, can be recycled.Laser often melts one layer, and formation cylinder declines a thickness, and (10-50 μm can
Adjust), powder feeding cylinder rises a certain distance (being usually 1.5 times of thickness), takes away powder with scraper and completes a powdering action.
In powder after laser irradiates fusing cooling, the influence of stimulated light working process parameter, it is possible to can cause to work as
Preceding melting zone produces phenomena such as tilting or deforming so that the height after fusing is higher than the height of current bisque.It is most of at present to swash
The powdering of light selective melting equipment all uses flexible power spreading device, i.e. scraper runs into high point relief and crosses high point, continues paving below
Powder, ensure the fluency of whole powdering process.However, the defects of inevitable be present in flexible power spreading device, when scraper allow it is too high
After point, this high point very likely turns into a defect source, make stomata in finished product, be mingled with, the odds such as crackle increases.In addition
Caused waste residue is largely taken away by circulated air in process, but has small part to fall on powder bed, after waste residue falls into powder bed
High point is similarly formed, flexible power spreading device can not take away the waste residue of these high points, but be pressed into powder bed, influence most
The quality of finished product afterwards.
As can be seen here, above-mentioned existing selective laser melting unit is upper with using in structure, method, it is clear that has still suffered from not
Just with defect, and urgently it is further improved.A kind of new selective laser melting unit how is founded, it is removed powdering
During high point influence, improve final product quality, turning into current industry pole needs improved target.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of selective laser melting unit, it is removed height during powdering
The influence of point, final product quality is improved, so as to overcome the shortcomings of flexible power spreading device in existing selective laser melting unit.
In order to solve the above technical problems, the present invention provides a kind of selective laser melting unit, including rigid power spreading device, milling
Knife topping machanism and control device；
The rigid power spreading device includes scraper mechanism, guide rail mechanism, actuating unit and overload current testing agency, described
Actuating unit drives guide rail of the scraper mechanism along the guide rail mechanism to move, and the overload current testing agency is arranged on institute
State in scraper mechanism, whether be in for detecting the scraper mechanism and send to the control by card-like state, and by detection information
Device；
The milling cutter topping machanism includes mechanical arm and is arranged on the milling cutter of the mechanical arm free end, the milling cutter and machine
Tool arm is connected with the control device；
The control device, the detection information sent for receiving and analyzing the overload current testing agency, and according to
The detection information controls the mechanical arm and milling cutter to realize the action for cutting off high point.
As a modification of the present invention, the scraper mechanism includes scraper and the doctor blade holder for fixed doctor, described
The both ends of doctor blade holder are respectively equipped with sliding block, and the sliding block is located in the guide rail of the guide rail mechanism, the overload current detection machine
Structure is arranged on the doctor blade holder.
Further improve, the doctor blade holder uses strip fixed mount of the cross section for inverted U, and the scraper includes point of a knife
Side and knife back side, the knife back side of the scraper are fixed in the U-type groove of the fixed mount.
Further improve, the scraper mechanism also includes multiple fastening bolts, and the top surface of the strip fixed mount opens up
There are multiple through holes passed through for fastening bolt, the knife back side top surface of the scraper is provided with multiple interior correspondingly with the through hole
Screwed hole, then the fastening bolt realized by connection with the through hole and internal thread hole the scraper is fixed on it is described solid
Determine in the U-type groove of frame.
Further improve, the scraper mechanism also includes lateral pressure strip and multiple compressing members, and the lateral pressure strip is set
The lateral surface in the strip fixed mount is put, is offered on the lateral pressure strip and the fixed mount side being in contact with it
Multiple connecting holes passed through for the compressing member, then the compressing member realized by engaging with the connecting hole by the scraper
It is fixed on from side in the U-type groove of the fixed mount.
Further improve, the scraper is using the good metal material of hardness and wearability.
Further improve, the guide rail mechanism is using ring track structure.
After such design, the present invention at least has advantages below：
Selective laser melting unit of the present invention is by setting rigid scraper, by the rigidity of scraper to height during powdering
Point was scraped by force, if high point is cut away by scraper, powdering action smoothly completes, and powdering effect is good, and bisque is uniform, ensures system
The precision of standby part；If scraper by card, passes through the monitoring of overload current detection means and the stock removal action of milling cutter topping machanism, real
Now to the cutting of high point, ensure that in process be not in high point, part is produced the probability of defect and substantially reduce, further
Improve final product quality.
Brief description of the drawings
Above-mentioned is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, below
With reference to accompanying drawing, the present invention is described in further detail with embodiment.
Fig. 1 is the dimensional structure diagram of selective laser melting unit of the present invention；
Fig. 2 is the structural side view of selective laser melting unit of the present invention；
Fig. 3 is the dimensional structure diagram of scraper mechanism in the present invention；
Fig. 4 is the length direction side view of scraper mechanism in the present invention；
Fig. 5 is the width side view of scraper mechanism in the present invention；
Fig. 6 is the sectional view of line A-A in Fig. 4；
Fig. 7 is the sectional view of line B-B in Fig. 4.
Embodiment
Referring to the drawings shown in 1 and 2, selective laser melting unit of the present invention includes rigid power spreading device, milling cutter topping machanism
And control device.Rigid power spreading device and the milling cutter topping machanism is arranged at the processing cabin 1 of the selective laser melting unit
It is interior.
The rigid power spreading device includes scraper mechanism 4, guide rail mechanism 6, actuating unit and overload current testing agency 46.Should
Scraper mechanism 4 is used for the rigid powdering action for realizing the selective laser melting unit.The guide rail mechanism 6 can use existing any
Guide rail structure, ring track structure is used in the present embodiment.The actuating unit drives the scraper mechanism 4 along the guide rail mechanism 6
Guide rail moves, and realizes that scraper acts to the rigid powdering that layer surface is melted on substrate 5.
Referring to the drawings shown in 3 to 7, the scraper mechanism 4 includes scraper 47 and the doctor blade holder 41 for fixed doctor 47.Due to
Scraper will realize the excision to high point, so the scraper 47 is prepared using the good metal material of hardness and wearability, it is resistance to strengthen its
The property used.The both ends of the doctor blade holder 41 are respectively equipped with sliding block 42, and the sliding block 42 is located in the guide rail of the guide rail mechanism 6.
The doctor blade holder 41 uses strip fixed mount of the cross section for inverted U in the present embodiment, and the scraper 47 includes point of a knife
Side and knife back side, the knife back side of the scraper 47 are fixed in the U-type groove of the fixed mount.
In order to realize the strong bonded of scraper and doctor blade holder, the scraper mechanism 4 also includes multiple fastening bolts 44, the strip
The top surface of shape fixed mount offers multiple through holes passed through for fastening bolt 44, the knife back side top surface of the scraper 47 be provided with it is multiple with
The one-to-one internal thread hole of the through hole, then the fastening bolt 44 realized by connection with the through hole and internal thread hole and scrape this
Knife 47 is fixed in the U-type groove of the fixed mount 41.
Further, the scraper mechanism 4 also includes lateral a pressure strip 43 and multiple compressing members 45.The lateral pressure strip 43
A lateral surface of the strip fixed mount is arranged on, is offered on the lateral pressure strip 43 and the fixed mount side being in contact with it
Multiple connecting holes passed through for the compressing member 45, then the compressing member 45 by engaging with the connecting hole realize by the scraper 47 from
Side is fixed in the U-type groove of the fixed mount 41.
Overload current testing agency 46 is arranged on the doctor blade holder 41 in the present embodiment, is for detecting the scraper mechanism 4
No be in is sent to the control device by card-like state, and by detection information, controls milling cutter topping machanism to perform phase by control device
It should act.
The milling cutter topping machanism 46 includes mechanical arm 2 and is arranged on the milling cutter 3 of the free end of mechanical arm 2, the milling cutter 3 and machine
Tool arm 2 is connected with the control device.
The control device, for receiving and analyzing the detection information of the overload current testing agency 46 transmission, and according to this
Detection information controls the mechanical arm 2 and milling cutter 3 to realize the action of excision high point.
The operation principle of selective laser melting unit of the present invention is：The powdering process of melting unit in selective laser
In, if rigid scraper 47 runs into high point, high point was scraped by force by the rigidity of scraper 47, if now high point is by scraper
" cutting away ", then powdering action smoothly complete, and are not in the point higher than bisque, guarantee prepares the precision of part；If now scraper
47 rigidity deficiencies, cause swaging clamp phenomenon occur, now immediate current increasing occurs in the overload current detection means 46 on doctor blade holder 41
Greatly, overload current protection device 46 starts, and scraper 47 is retreated to starting point, while sends signal to control device, is filled by control
Control machinery arm 2 and the automatic identification high point of milling cutter 3 are put, high point milling cutter 3 is machined away, mechanical arm 2 and milling cutter 3 are withdrawn afterwards,
Scraper mechanism works on.
Selective laser melting unit of the present invention is by setting rigid power spreading device, milling cutter topping machanism and control device, energy
Realize that 1) powdering effect is good, bisque is uniform, and the dimensional accuracy of part is high；2) be not in high point in process, part produces
The probability of defect substantially reduces；3) caused residue in process can be struck off, further reduces defect probability, improves finished product
Quality；4) resistance to overturning of powdering is high.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, this
Art personnel make a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all fall within this hair
In bright protection domain.
Claims (7)
1. a kind of selective laser melting unit, it is characterised in that including rigid power spreading device, milling cutter topping machanism and control dress
Put；
The rigid power spreading device includes scraper mechanism, guide rail mechanism, actuating unit and overload current testing agency, the power
Mechanism drives guide rail of the scraper mechanism along the guide rail mechanism to move, and the overload current testing agency is arranged on described scrape
On cutter mechanism, whether it is in for detecting the scraper mechanism and sends to the control device by card-like state, and by detection information；
The milling cutter topping machanism includes mechanical arm and is arranged on the milling cutter of the mechanical arm free end, the milling cutter and mechanical arm
It is connected with the control device；
The control device, the detection information sent for receiving and analyzing the overload current testing agency, and according to described
Detection information controls the mechanical arm and milling cutter to realize the action for cutting off high point.
2. selective laser melting unit according to claim 1, it is characterised in that the scraper mechanism includes scraper and use
In the doctor blade holder of fixed doctor, the both ends of the doctor blade holder are respectively equipped with sliding block, and the sliding block is located at leading for the guide rail mechanism
In rail, the overload current testing agency is arranged on the doctor blade holder.
3. selective laser melting unit according to claim 2, it is characterised in that the doctor blade holder uses cross section to fall
U-shaped strip fixed mount, the scraper include point of a knife side and knife back side, and the knife back side of the scraper is fixed on the fixed mount
U-type groove in.
4. selective laser melting unit according to claim 3, it is characterised in that the scraper mechanism also includes multiple tight
Fixing bolt, the top surface of the strip fixed mount offer multiple through holes passed through for fastening bolt, the knife back side of the scraper
Top surface be provided with it is multiple with the one-to-one internal thread hole of the through hole, then the fastening bolt by with the through hole and internal thread
The connection in hole, which is realized, to be fixed on the scraper in the U-type groove of the fixed mount.
5. selective laser melting unit according to claim 3, it is characterised in that the scraper mechanism also includes lateral pressure
Tight plate and multiple compressing members, the lateral pressure strip are arranged on a lateral surface of the strip fixed mount, the lateral compression
Multiple connecting holes passed through for the compressing member are offered on plate and the fixed mount side being in contact with it, then the compressing member leads to
The engaging realization with the connecting hole is crossed to be fixed on the scraper in the U-type groove of the fixed mount from side.
6. selective laser melting unit according to claim 1, it is characterised in that the scraper uses hardness and wearability
Good metal material.
7. selective laser melting unit according to claim 1, it is characterised in that the guide rail mechanism is using circular rails
Road structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711055884.0A CN107626924A (en) | 2017-10-27 | 2017-10-27 | A kind of selective laser melting unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711055884.0A CN107626924A (en) | 2017-10-27 | 2017-10-27 | A kind of selective laser melting unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107626924A true CN107626924A (en) | 2018-01-26 |
Family
ID=61106237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711055884.0A Pending CN107626924A (en) | 2017-10-27 | 2017-10-27 | A kind of selective laser melting unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111872391A (en) * | 2020-08-06 | 2020-11-03 | 南京中科煜宸激光技术有限公司 | Selective laser melting forming control system and method |
| CN117020236A (en) * | 2023-10-10 | 2023-11-10 | 康硕(山西)智能制造有限公司 | Scraping flat base for metal 3D printing |
| CN117680715A (en) * | 2024-01-31 | 2024-03-12 | 西安空天机电智能制造有限公司 | Laser selective melting single-scraper bidirectional powder spreading device, method and additive manufacturing equipment |
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| US20150115490A1 (en) * | 2012-04-20 | 2015-04-30 | Eos Gmbh Electro Optical Systems | Method and Divice for Producing Components in a Beam Melting Installation |
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| US20160311025A1 (en) * | 2015-04-27 | 2016-10-27 | Sodick Co., Ltd. | Metal 3d printer |
| US20160325503A1 (en) * | 2014-01-02 | 2016-11-10 | United Technologies Corporation | Additive manufacturing process distortion management |
| CN206343898U (en) * | 2016-12-30 | 2017-07-21 | 青岛卓思三维智造技术有限公司 | Melt and five-axis milling complex machining device selective laser |
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Patent Citations (5)
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| US20150115490A1 (en) * | 2012-04-20 | 2015-04-30 | Eos Gmbh Electro Optical Systems | Method and Divice for Producing Components in a Beam Melting Installation |
| US20160325503A1 (en) * | 2014-01-02 | 2016-11-10 | United Technologies Corporation | Additive manufacturing process distortion management |
| US20160311025A1 (en) * | 2015-04-27 | 2016-10-27 | Sodick Co., Ltd. | Metal 3d printer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111872391A (en) * | 2020-08-06 | 2020-11-03 | 南京中科煜宸激光技术有限公司 | Selective laser melting forming control system and method |
| CN111872391B (en) * | 2020-08-06 | 2021-09-17 | 南京中科煜宸激光技术有限公司 | Selective laser melting forming control system and method |
| CN113664225A (en) * | 2020-08-06 | 2021-11-19 | 南京中科煜宸激光技术有限公司 | Selective laser melting and forming control system |
| CN113664225B (en) * | 2020-08-06 | 2022-11-22 | 南京中科煜宸激光技术有限公司 | Selective laser melting and forming control system |
| CN117020236A (en) * | 2023-10-10 | 2023-11-10 | 康硕(山西)智能制造有限公司 | Scraping flat base for metal 3D printing |
| CN117020236B (en) * | 2023-10-10 | 2024-01-02 | 康硕(山西)智能制造有限公司 | Scraping flat base for metal 3D printing |
| CN117680715A (en) * | 2024-01-31 | 2024-03-12 | 西安空天机电智能制造有限公司 | Laser selective melting single-scraper bidirectional powder spreading device, method and additive manufacturing equipment |
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