CN209969564U - Powder preheating device for SLM equipment - Google Patents
Powder preheating device for SLM equipment Download PDFInfo
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- CN209969564U CN209969564U CN201822200043.0U CN201822200043U CN209969564U CN 209969564 U CN209969564 U CN 209969564U CN 201822200043 U CN201822200043 U CN 201822200043U CN 209969564 U CN209969564 U CN 209969564U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a powder preheating device for SLM equipment, including the shaping jar, the inside Z axle lift forming frame that is provided with of shaping jar, Z axle lift forming frame upper surface is provided with the heat insulating board, the heat insulating board upper surface is provided with the hot plate, the hot plate upper surface is provided with the substrate, still include liquid heating temperature control device, the lateral wall of shaping jar is embedded to have the inside runner of shaping jar, the liquid heating temperature control device entry and the export that the both ends of the inside runner of shaping jar are connected respectively, the substrate or the hot plate are embedded to have the heating runner, the liquid heating temperature control device entry and the export that the both ends of heating runner also connect respectively. The utility model discloses a powder preheating device for SLM equipment adopts the mode of liquid heating, can realize safe constant temperature heating, avoids short circuit and metal powder to explode the risk that causes the explosion.
Description
Technical Field
The utility model belongs to the technical field of the vibration material disk, a powder preheating device for SLM equipment is related to.
Background
At present, the SLM equipment preheats the powder by generating heat through electricity, so as to achieve the purpose of preheating the powder layer. The distribution of the channels should be uniformly distributed on the heating plate so as to achieve uniform heating of the whole heating plate breadth. The channel is opened on the back of the heating plate because the electric wire is routed from the lower Z-axis forming cylinder and the upper surface is the substrate. After the wiring of the trench, the contact is covered by copper, so that the copper has good thermal conductivity and can conduct heat quickly. The heat transfer is firstly generated by the resistor, the heat is conducted and radiated to the heating plate and then to the base material through the copper, and the base material transfers the heat to the powder layer to realize the purpose of preheating the powder layer. Of course, as printing progresses, the thicker the powder layer, the more heat transfer progresses. The monitoring of preheating temperature detects half hot plate respectively through two temperature sensor at the hot plate back installation, and the preheating temperature control is in certain within range among the printing process, when the temperature surpassed preheating temperature, and the heating stops, when the temperature was less than preheating temperature, opens the heating.
As the SLM equipment prints large parts, the breadth of the base material is larger and larger, the required heat is increased, the heating current is increased continuously by adopting an electric heating mode, wiring on the heating plate is difficult to design, and great potential safety hazards exist. Due to the fact that voltage and current exist in electric heating, risks and problems such as short circuit and metal powder detonation are prone to occurring in a dust environment. Because the electric heating indirectly reaches the powder layer through heat conduction, the heating plate is used as a heat source for transferring heat from bottom to top, the gradient of temperature transfer is large, the consistency of the ambient temperature cannot be ensured, the thickness of the base material is different and has deviation, and the factors tend to cause the surface of the base material to have large temperature difference, thereby influencing the printing quality of parts. Through the hot plate as the heat source, when preheating temperature is higher, need longer heat time, lead to the ambient temperature constantly to rise, hot plate thermal expansion deformation, the card pause phenomenon appears easily in the lift of later stage substrate to the problem of printing the interrupt appears. The electric heating can not be started all the time, and can not be accurately realized in order to maintain the preheating temperature, when the temperature is higher than the preheating temperature, the heating is stopped, and when the temperature is lower than the preheating temperature, the heating is started, so that the preheating temperature is changed within a certain range, and the constant temperature can not be ensured.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a powder preheating device for SLM equipment adopts the mode of liquid heating, can realize safe constant temperature heating, avoids short circuit and metal powder to explode the risk that causes the explosion.
The utility model discloses the technical scheme who adopts is, a powder preheating device for SLM equipment, including the shaping jar, shaping jar internally mounted has Z axle lift shaping frame, Z axle lift shaping frame upper surface mounting has the heat insulating board, surface mounting has the hot plate on the heat insulating board, surface mounting has the substrate on the hot plate, still include liquid heating temperature control device, the lateral wall of shaping jar is embedded to have the inside runner of shaping jar, the liquid heating temperature control device entry and the export that the both ends of the inside runner of shaping jar are connected respectively, the substrate or the hot plate are embedded to have the heating runner, the liquid heating temperature control device entry and the export that the both ends of heating runner also connect respectively.
The utility model is also characterized in that,
the inlet and the outlet of the liquid heating temperature control device are respectively connected with a liquid inflow main pipeline and a liquid outflow main pipeline, the two ends of the heating flow channel are also respectively connected with the liquid inflow main pipeline and the liquid outflow main pipeline, and the two ends of the flow channel in the forming cylinder are respectively connected with the liquid inflow main pipeline and the liquid outflow main pipeline.
The left side wall and the right side wall of the forming cylinder are respectively embedded with a forming cylinder internal flow passage, and the two ends of the forming cylinder internal flow passage in the left side wall and the right side wall of the forming cylinder are respectively connected with a liquid inflow main pipeline and a liquid outflow main pipeline through pipelines.
Flow regulating valves are arranged on connecting pipelines of the flow channel inside the forming cylinder and the liquid inflow main pipeline and the liquid outflow main pipeline, and each flow regulating valve is connected with a liquid heating temperature control device through a lead.
The inner runners of the forming cylinder are distributed in an S shape in the left side wall and the right side wall of the forming cylinder.
The heating flow channel comprises a return-shaped flow channel which is arranged in the base material or the heating plate and distributed around the base material or the heating plate, two edges corresponding to the return-shaped flow channel are respectively connected with a branch flow channel, the other ends of the two branch flow channels are positioned at the central position of the base material or the heating plate, one of the branch flow channels is connected with the liquid inflow main pipeline through a pipeline, and the other branch flow channel is connected with the liquid outflow main pipeline through a pipeline.
Flow regulating valves are arranged on the connecting pipelines of the branch pipelines and the liquid outflow main pipeline or the liquid inflow main pipeline, and each flow regulating valve is connected with a liquid heating temperature control device through a lead.
Temperature sensors are arranged in the base material or the heating plate and in the left side wall and the right side wall of the forming cylinder, and the temperature sensors are connected with a liquid heating temperature control device through leads.
The liquid heating temperature control device comprises a liquid heating device and a temperature control device connected with the liquid heating device through a wire, a temperature sensor is connected with the temperature control device through a wire, an inlet and an outlet of the liquid heating device are respectively connected with a liquid inflow main pipeline and a liquid outflow main pipeline, each flow regulating valve is connected with the temperature control device through a wire, a temperature sensor is further arranged at an inlet of the liquid heating device, and the temperature sensors are connected with the temperature control device through wires.
The utility model has the advantages that:
(1) the utility model discloses a mode of liquid heating can realize safe constant temperature heating, avoids the short circuit to cause the risk of explosion, uses liquid heating device to heat liquid, provides the circulation in power formation water route to detect the temperature arrival preheating temperature of backward flow liquid, through installing flow control valve on each branch road pipeline, guarantee that whole pipe-line system's pressure balance, control fluid flow realize the temperature control at different positions, improve the heating quality. The utility model discloses can directly preheat for the substrate for the uniformity can be realized to the temperature of substrate, also can preheat the hot plate, gives the substrate through the heat transfer.
(2) The utility model discloses can guarantee SLM equipment preheating temperature's stability, improve the heating quality of bisque, have good heat preservation effect, the effectual quality of guaranteeing the part and printing has eliminated the potential safety hazard of metal powder explosion simultaneously.
(3) The utility model discloses reduced the gradient of temperature transmission, ensured the uniformity of bisque ambient temperature, the liquid that flows provides stable heat for the temperature of the whole breadth of substrate is even, has ensured the connection quality of part and substrate.
(4) The liquid temperature and the temperature of each part of the equipment are monitored in real time through the temperature control device and the temperature sensor, the change of the temperature is accurately controlled, the local rise of the temperature around the heating plate and the base material is avoided through the liquid heating plate, and the blocking phenomenon of the Z-axis lifting is eliminated.
Drawings
Fig. 1 is a schematic structural diagram of a powder preheating device for an SLM apparatus according to the present invention;
fig. 2 is a schematic circuit connection diagram of a powder preheating device for an SLM apparatus according to the present invention;
fig. 3 is a layout diagram of the internal flow passage of the forming cylinder in the powder preheating device for the SLM apparatus according to the present invention;
fig. 4 is a layout diagram of a heating channel in a powder preheating apparatus for an SLM apparatus according to the present invention;
FIG. 5 is a top view of FIG. 4;
fig. 6 is a flow chart of an operation method of the powder preheating device for the SLM device according to the present invention.
In the figure, 1, a forming cylinder, 2, a part in printing, 3, a base material, 4, a heating plate, 5, a heat insulation plate, 6, a Z-axis lifting forming frame, 7, a forming cylinder internal flow channel, 8, a liquid inflow main pipeline, 9, a liquid outflow main pipeline, 10, a liquid heating temperature control device, 11, a flow regulating valve, 12, a temperature sensor and 13, a heating flow channel are arranged in the forming cylinder;
10-1. a liquid heating device, 10-2. a temperature control device;
13-1. a 'return' type flow passage, and 13-2. a branch flow passage.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a powder preheating device for SLM equipment, as shown in figure 1, including shaping jar 1, 1 internally mounted of shaping jar has Z axle lift shaping frame 6, surface mounting has heat insulating board 5 on the 6 upper surfaces of Z axle lift shaping frame, surface mounting has hot plate 4 on the heat insulating board 5, surface mounting has substrate 3 on the hot plate 4, still include liquid heating temperature control device 10, the lateral wall of shaping jar 1 is embedded to have shaping jar internal flow way 7, the liquid heating temperature control device 10 entry and the export of connecting respectively at the both ends of shaping jar internal flow way 7, substrate 3 or hot plate 4 are embedded to have heating runner 13, the liquid heating temperature control device 10 entry and the export that the both ends of heating runner 13 also connect respectively.
The inlet and the outlet of the liquid heating temperature control device 10 are respectively connected with a liquid inflow main pipeline 8 and a liquid outflow main pipeline 9, the two ends of the heating flow channel 13 are also respectively connected with the liquid inflow main pipeline 8 and the liquid outflow main pipeline 9, and the two ends of the forming cylinder internal flow channel 7 are respectively connected with the liquid inflow main pipeline 8 and the liquid outflow main pipeline 9.
The left and right side walls of the forming cylinder 1 are respectively embedded with a forming cylinder internal flow passage 7, and both ends of the forming cylinder internal flow passage 7 in the left and right side walls of the forming cylinder 1 are respectively connected with a liquid inflow main pipe 8 and a liquid outflow main pipe 9 through pipes.
As shown in fig. 3, the forming cylinder internal flow paths 7 are distributed in an "S" shape in both left and right side walls of the forming cylinder 1.
As shown in fig. 4-5, the heating channel 13 includes a "return" type channel 13-1 disposed in the substrate 3 or the heating plate 4 and distributed around the periphery thereof, two sides corresponding to the "return" type channel are further connected with a branch channel 13-2, the other ends of the two branch channels 13-2 are located at the central position of the substrate 3 or the heating plate 4, one branch channel 13-2 is connected with the liquid inflow main channel 8 through a pipe, and the other branch channel 13-2 is connected with the liquid outflow main channel 9 through a pipe.
The liquid heating temperature control device 10 comprises a liquid heating device 10-1 and a temperature control device 10-2 connected with the liquid heating device 10-1 through a lead, a temperature sensor 12 is connected with the temperature control device 10-2 through a lead, an inlet and an outlet of the liquid heating device 10-1 are respectively connected with a liquid inflow main pipeline 8 and a liquid outflow main pipeline 9, each flow regulating valve 11 is connected with the temperature control device 10-2 through a lead, a temperature sensor 12 is further arranged at an inlet of the liquid heating device 10-1, and the temperature sensor 12 is connected with the temperature control device 10-2 through a lead.
The utility model relates to a working method for powder preheating device of SLM equipment, its flow is shown in fig. 6, specifically implements according to following step:
step 2, the temperature control device 10-2 compares the set preheating temperature with the three temperature sensors 12 for judgment, if the temperature is higher than the preheating temperature, the temperature control device 10-2 gives a signal to control the two flow regulating valves 11 of the corresponding loop, the opening degrees of the two flow regulating valves 11 of the same loop are the same, and the flow of the pipeline is reduced until the temperature is reduced to the preheating temperature; if the temperature is lower than the preheating temperature, the temperature control device 10-2 gives a signal to control the two flow regulating valves 11 of the corresponding branch, and the flow of the pipeline is increased until the temperature of the part reaches the preheating temperature;
and 3, starting to print the parts when the temperature of each part reaches the specified preheating temperature.
The liquid of the utility model can adopt water and other easily heated liquids.
Example 1
Taking preheating of a heating runner 13 arranged in a heating plate of the equipment as an example, the preheating temperature is 100 ℃, and the working process is as follows:
step 2, the temperature control device 10-2 compares and judges the set preheating temperature with the three temperature sensors 12, if the temperature is higher than the preheating temperature by 100 ℃, the temperature control device 10-2 gives a signal to control the two flow regulating valves 11 of the corresponding loop, the opening degrees of the two flow regulating valves 11 of the same loop are the same, and the flow of the pipeline is reduced until the temperature is reduced to 100 ℃; if the temperature is lower than the preheating temperature of 100 ℃, the temperature control device 10-2 gives a signal to control the two flow regulating valves 11 of the corresponding branch, and the flow of the pipeline is increased until the temperature of the part reaches the preheating temperature of 100 ℃;
and 3, when the temperature of each part reaches the specified preheating temperature, starting to print the part to form the part 2 in printing.
Claims (9)
1. A powder preheating device for SLM equipment comprises a forming cylinder (1), a Z-axis lifting forming frame (6) is arranged in the forming cylinder (1), a heat insulation plate (5) is arranged on the upper surface of the Z-axis lifting forming frame (6), a heating plate (4) is arranged on the upper surface of the heat insulation plate (5), a base material (3) is arranged on the upper surface of the heating plate (4), it is characterized by also comprising a liquid heating temperature control device (10), wherein the side wall of the forming cylinder (1) is embedded with a forming cylinder internal flow passage (7), the two ends of the inner flow passage (7) of the forming cylinder are respectively connected with the inlet and the outlet of the liquid heating temperature control device (10), a heating flow channel (13) is embedded in the base material (3) or the heating plate (4), and the two ends of the heating flow channel (13) are also respectively connected with the inlet and the outlet of the liquid heating temperature control device (10).
2. The powder preheating device for the SLM apparatus according to claim 1, wherein the inlet and the outlet of the liquid heating temperature control device (10) are connected with a liquid inflow main pipe (8) and a liquid outflow main pipe (9), respectively, the two ends of the heating flow channel (13) are also connected with the liquid inflow main pipe (8) and the liquid outflow main pipe (9), respectively, and the two ends of the forming cylinder internal flow channel (7) are connected with the liquid inflow main pipe (8) and the liquid outflow main pipe (9), respectively.
3. The powder preheating device for the SLM apparatus according to claim 2, wherein the forming cylinder (1) has a forming cylinder internal flow passage (7) embedded in each of the left and right side walls thereof, and both ends of the forming cylinder internal flow passage (7) in each of the left and right side walls of the forming cylinder (1) are connected to the liquid inflow main pipe (8) and the liquid outflow main pipe (9) through pipes.
4. The powder preheating device for SLM equipment according to claim 2, characterized in that the forming cylinder inner flow channel (7) and the connection of the liquid inflow main pipe (8) and the liquid outflow main pipe (9) are provided with flow regulating valves (11), each flow regulating valve (11) is connected to a liquid heating temperature control device (10) through a wire.
5. The powder preheating device for SLM equipment according to claim 3, characterized in that the forming cylinder inner flow channels (7) are distributed in an S shape in the left and right side walls of the forming cylinder (1).
6. The powder preheating apparatus for SLM device according to claim 2, wherein the heating flow channel (13) comprises a "return" type flow channel (13-1) disposed in the substrate (3) or the heating plate (4) and distributed around the periphery thereof, the two corresponding sides of the "return" type flow channel are further connected with a branch flow channel (13-2), the other ends of the two branch flow channels (13-2) are located at the center of the substrate (3) or the heating plate (4) and one branch flow channel (13-2) is connected with the liquid inflow main pipe (8) through a pipe, and the other branch flow channel (13-2) is connected with the liquid outflow main pipe (9) through a pipe.
7. The powder preheating device for SLM equipment according to claim 6, characterized in that the connection pipe of the branch flow channel (13-2) and the liquid outflow main pipe (9) or the liquid inflow main pipe (8) is provided with a flow control valve (11), each flow control valve (11) is connected with a liquid heating temperature control device (10) through a wire.
8. The powder preheating device for SLM equipment according to claim 7, characterized in that the substrate (3) or the heating plate (4) and the left and right side walls of the forming cylinder (1) are installed with temperature sensors (12), and the temperature sensors (12) are connected to the liquid heating temperature control device (10) through wires.
9. A powder preheating device for SLM apparatus according to claim 8, the liquid heating temperature control device (10) comprises a liquid heating device (10-1) and a temperature control device (10-2) connected with the liquid heating device (10-1) through a lead, the temperature sensor (12) is connected with the temperature control device (10-2) through a lead, the inlet and the outlet of the liquid heating device (10-1) are respectively connected with a liquid inflow main pipeline (8) and a liquid outflow main pipeline (9), each flow regulating valve (11) is connected with a temperature control device (10-2) through a lead, a temperature sensor (12) is also arranged at the inlet of the liquid heating device (10-1), the temperature sensor (12) is connected with the temperature control device (10-2) through a lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822200043.0U CN209969564U (en) | 2018-12-26 | 2018-12-26 | Powder preheating device for SLM equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822200043.0U CN209969564U (en) | 2018-12-26 | 2018-12-26 | Powder preheating device for SLM equipment |
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| CN209969564U true CN209969564U (en) | 2020-01-21 |
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| CN201822200043.0U Active CN209969564U (en) | 2018-12-26 | 2018-12-26 | Powder preheating device for SLM equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967738A (en) * | 2018-12-26 | 2019-07-05 | 西安铂力特增材技术股份有限公司 | A kind of powder preheating device and its working method for SLM device |
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2018
- 2018-12-26 CN CN201822200043.0U patent/CN209969564U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967738A (en) * | 2018-12-26 | 2019-07-05 | 西安铂力特增材技术股份有限公司 | A kind of powder preheating device and its working method for SLM device |
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