CN114833356A - High-temperature preheating device for additive manufacturing - Google Patents
High-temperature preheating device for additive manufacturing Download PDFInfo
- Publication number
- CN114833356A CN114833356A CN202210423693.XA CN202210423693A CN114833356A CN 114833356 A CN114833356 A CN 114833356A CN 202210423693 A CN202210423693 A CN 202210423693A CN 114833356 A CN114833356 A CN 114833356A
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- CN
- China
- Prior art keywords
- additive manufacturing
- preheating device
- temperature
- heating pipe
- temperature preheating
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/10—Auxiliary heating means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/50—Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/80—Data acquisition or data processing
- B22F10/85—Data acquisition or data processing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/90—Means for process control, e.g. cameras or sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to the technical field of 3D printing, in particular to a high-temperature preheating device for additive manufacturing, which is used for reducing the internal stress of a formed part. The invention realizes the function of heating the upper surface, the lower surface and the periphery of the formed part simultaneously, improves the consistency of the preheating temperature of the formed part and can effectively reduce the internal stress.
Description
Technical Field
The invention relates to the technical field of 3D printing, in particular to a high-temperature preheating device for additive manufacturing.
Background
In the additive manufacturing process, materials are subjected to two processes of melting and solidifying, internal stress is generated in the two processes, so that a formed part is deformed, the dimensional accuracy of the formed part is not high if the formed part is light, and the machining process cannot be continued if the formed part is heavy.
At present, the residual stress is eliminated by generally preheating a substrate by using a heating rod, and the preheating temperature is not adjusted according to the stress actually generated by a material, so that the problem of deformation of a formed part caused by too low and too high temperature of the heating rod is caused.
Disclosure of Invention
The invention provides a high-temperature preheating device for additive manufacturing, which improves the consistency of the preheating temperature of a formed part and can effectively reduce the internal stress.
In order to realize the purpose of the invention, the adopted technical scheme is as follows: the utility model provides a high temperature preheating device for additive manufacturing for reduce the internal stress of formed part, table surface is located the top of shaping jar, and the device includes solenoid and first heating pipe, and solenoid is located the top of formed part, and first heating pipe is laid around the shaping jar wall.
As an optimized scheme of the invention, the high-temperature preheating device for additive manufacturing comprises a motor, an electric cylinder, a base plate and a second heating pipe, wherein the base plate is installed at the tail end of the electric cylinder, the motor drives the electric cylinder to enable the base plate to move up and down along the cylinder wall of the forming part, and the second heating pipe is installed on the lower surface of the base plate.
As an optimized scheme of the invention, the periphery of the outer side of the cylinder wall of the forming cylinder is provided with the heat-insulating layer.
As an optimized scheme of the invention, the high-temperature preheating device for additive manufacturing further comprises an X-ray stress measuring instrument, and the internal stress of the formed part is measured by the X-ray stress measuring instrument.
As an optimized scheme of the invention, the high-temperature preheating device for additive manufacturing further comprises a temperature adjusting device and a control box, wherein the temperature adjusting device is used for adjusting the temperatures of the first heating pipe, the second heating pipe and the electromagnetic coil, the X-ray stress measuring instrument is connected with the control box, and the control box drives the temperature adjusting device according to the stress measuring result of the X-ray stress measuring instrument.
As an optimized scheme of the invention, the substrate is a metal heat-conducting plate.
The invention has the positive effects that: 1) the invention realizes the function of heating the upper surface, the lower surface and the periphery of the formed part simultaneously, improves the consistency of the preheating temperature of the formed part and can effectively reduce the internal stress;
2) the temperature is adjusted in real time according to the stress result of the formed part, so that the formed part is prevented from being deformed due to internal stress in the additive manufacturing process, the material is prevented from being deformed due to overhigh heating temperature caused by stress reduction, and a balance point is found between the internal stress reduction and the heating temperature by adjusting the temperature.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of the overall structure of the present invention;
wherein: 1. the device comprises a forming piece, 2, a forming cylinder, 3, a working table, 4, an electromagnetic coil, 5, a first heating pipe, 6, a motor, 7, an electric cylinder, 8, a base plate, 9, a second heating pipe, 10, a heat preservation layer, 11 and a scraper.
Detailed Description
As shown in figure 1, the invention discloses a high-temperature preheating device for additive manufacturing, which is used for reducing the internal stress of a formed part 1, wherein a working table top 3 is positioned above a forming cylinder 2, the formed part 1 is positioned at the intersection of the forming cylinder 2 and the working table top 3 during working, the device comprises an electromagnetic coil 4 and a first heating pipe 5, the electromagnetic coil 1 is positioned above the formed part 1, and the first heating pipe 5 is arranged around the cylinder wall of the forming cylinder 2. The electromagnetic coil 4 is positioned below the scraper 11, and can directly heat the upper surface of the formed part 1, so that the uniformity of the preheating temperature of the formed part 1 is improved, and the internal stress can be effectively reduced. The first heating pipe 5 heats the lower surface of the molding member 1.
The high-temperature preheating device for additive manufacturing comprises a motor 6, an electric cylinder 7, a base plate 8 and a second heating pipe 9, wherein the base plate 8 is installed at the tail end of the electric cylinder 7, the motor 6 drives the electric cylinder 7 to enable the base plate 8 to move up and down along the cylinder wall of the forming part 1, and the second heating pipe 9 is installed on the lower surface of the base plate 8. The substrate 8 is a metal heat-conducting plate. The metal heat conducting plate facilitates the heat transfer of the first heating tube 5 to the shaped part 1. The motor 6 drives the electric cylinder 7 so that the base plate 8 is close to the molded article 1, so that the lower surface of the molded article 1 can be heated.
The periphery of the outer side of the cylinder wall of the forming cylinder 2 is provided with a heat preservation layer 10. The insulating layer 10 can reduce the heat dissipation of the wall of the forming cylinder 2 and keep the forming cylinder 2 at a higher temperature.
The high-temperature preheating device for additive manufacturing further comprises an X-ray stress measuring instrument, and the internal stress of the formed part 1 is measured through the X-ray stress measuring instrument.
The X-ray stress measuring instrument is used for measuring the residual stress of the surface layer of a metal material or a component based on the principle that X-rays diffract when penetrating through a metal lattice. When residual stress exists on the surface of the metal material or the member, corresponding microscopic strain also exists in the microscopic lattice spacing, and the lattice spacing change can be calculated by measuring the X-ray diffraction peak of the material with the residual stress after diffraction and comparing the X-ray diffraction peak with the stress-free lattice diffraction peak, so that the stress change value is further calculated by utilizing a Poisson formula.
The high-temperature preheating device for additive manufacturing further comprises a temperature adjusting device and a control box, wherein the temperature adjusting device is used for adjusting the temperature of the first heating pipe 5 and the second heating pipe 9 and the electromagnetic coil 4, the X-ray stress measuring instrument is connected with the control box, and the control box drives the temperature adjusting device according to the stress measuring result of the X-ray stress measuring instrument. The temperature adjusting device can be a temperature adjusting device such as a temperature controller.
When the heating device is used, the electromagnetic coil 4 is used for heating the surface of the formed part 1, the first heating pipe 5 and the second heating pipe 9 are used for heating the periphery of the formed part 1 and the substrate 8, an X-ray stress measuring instrument is used for monitoring the internal stress of the formed part 1 in the heating process, the control box drives the temperature adjusting device according to the stress measuring result of the X-ray stress measuring instrument, and the temperature adjusting device is used for adjusting the temperature of the first heating pipe 5 and the second heating pipe 9 and the temperature of the electromagnetic coil 4.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a high temperature preheating device for additive manufacturing for reduce the internal stress of formed part (1), table surface (3) are located the top of forming cylinder (2), its characterized in that: the device comprises an electromagnetic coil (4) and a first heating pipe (5), wherein the electromagnetic coil (1) is positioned above the forming part (1), and the first heating pipe (5) is arranged around the wall of the forming cylinder (2).
2. The high-temperature preheating device for additive manufacturing according to claim 1, wherein: the high-temperature preheating device for additive manufacturing comprises a motor (6), an electric cylinder (7), a base plate (8) and a second heating pipe (9), wherein the base plate (8) is installed at the tail end of the electric cylinder (7), the motor (6) drives the electric cylinder (7) to enable the base plate (8) to move up and down along the cylinder wall of a forming piece (1), and the second heating pipe (9) is installed on the lower surface of the base plate (8).
3. The high-temperature preheating device for additive manufacturing according to claim 2, wherein: the periphery of the outer side of the wall of the molding cylinder (2) is provided with a heat-insulating layer (10).
4. The high-temperature preheating device for additive manufacturing according to claim 2, wherein: the high-temperature preheating device for additive manufacturing further comprises an X-ray stress measuring instrument, and the internal stress of the formed part (1) is measured through the X-ray stress measuring instrument.
5. The high-temperature preheating device for additive manufacturing according to claim 4, wherein: the high-temperature preheating device for additive manufacturing further comprises a temperature adjusting device and a control box, wherein the temperature adjusting device is used for adjusting the temperatures of the first heating pipe (5), the second heating pipe (9) and the electromagnetic coil (4), the X-ray stress measuring instrument is connected with the control box, and the control box drives the temperature adjusting device according to the stress measuring result of the X-ray stress measuring instrument.
6. A high temperature preheating device for additive manufacturing according to any one of claims 2 to 5, wherein: the substrate (8) is a metal heat-conducting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210423693.XA CN114833356A (en) | 2022-04-21 | 2022-04-21 | High-temperature preheating device for additive manufacturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210423693.XA CN114833356A (en) | 2022-04-21 | 2022-04-21 | High-temperature preheating device for additive manufacturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114833356A true CN114833356A (en) | 2022-08-02 |
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ID=82565325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210423693.XA Pending CN114833356A (en) | 2022-04-21 | 2022-04-21 | High-temperature preheating device for additive manufacturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114833356A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168518A (en) * | 2016-08-05 | 2016-11-30 | 中北大学 | Selective laser melting molded article residual stress real-time detection apparatus |
| CN205763861U (en) * | 2016-07-07 | 2016-12-07 | 上海珂懋奇光电科技有限公司 | A kind of precinct laser fusion Graphene coating blade local preheating device |
| CN205763857U (en) * | 2016-07-07 | 2016-12-07 | 上海珂懋奇光电科技有限公司 | A kind of precinct laser fusion local preheating power spreading device |
| CN206551490U (en) * | 2016-12-16 | 2017-10-13 | 北京隆源自动成型***有限公司 | The 3D printer heated with laser |
| CN108480638A (en) * | 2018-05-28 | 2018-09-04 | 华中科技大学 | A kind of three-stage selective laser melting combination pre-heating system |
| CN209682920U (en) * | 2019-04-03 | 2019-11-26 | 南京铖联激光科技有限公司 | A kind of novel SLM 3D printer substrate heating equipment |
| WO2021228593A1 (en) * | 2020-05-15 | 2021-11-18 | Siemens Aktiengesellschaft | Method for additive manufacturing by means of dual selective irradiation of a powder bed and preheating |
-
2022
- 2022-04-21 CN CN202210423693.XA patent/CN114833356A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205763861U (en) * | 2016-07-07 | 2016-12-07 | 上海珂懋奇光电科技有限公司 | A kind of precinct laser fusion Graphene coating blade local preheating device |
| CN205763857U (en) * | 2016-07-07 | 2016-12-07 | 上海珂懋奇光电科技有限公司 | A kind of precinct laser fusion local preheating power spreading device |
| CN106168518A (en) * | 2016-08-05 | 2016-11-30 | 中北大学 | Selective laser melting molded article residual stress real-time detection apparatus |
| CN206551490U (en) * | 2016-12-16 | 2017-10-13 | 北京隆源自动成型***有限公司 | The 3D printer heated with laser |
| CN108480638A (en) * | 2018-05-28 | 2018-09-04 | 华中科技大学 | A kind of three-stage selective laser melting combination pre-heating system |
| CN209682920U (en) * | 2019-04-03 | 2019-11-26 | 南京铖联激光科技有限公司 | A kind of novel SLM 3D printer substrate heating equipment |
| WO2021228593A1 (en) * | 2020-05-15 | 2021-11-18 | Siemens Aktiengesellschaft | Method for additive manufacturing by means of dual selective irradiation of a powder bed and preheating |
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