Substrate preheating device for alloy laser additive manufacturing

Abstract

The utility model relates to the field of additive manufacturing, in particular to a substrate preheating device for alloy laser additive manufacturing, which comprises a base, a heating device and a preheating device. The heating assembly is connected with the base so as to heat the horizontal heating surface; and the pressing plate is provided with machining patterns, the pressing plate is detachably arranged at the upper end of the base, and a fixing cavity corresponding to the base plate is formed between the pressing plate and the base. The substrate preheating device for alloy laser additive manufacturing is used for preheating a substrate, the problems of part deformation, cracking and the like in the alloy laser additive manufacturing process can be remarkably solved, and the substrate preheating device has good application prospects in the fields of large-scale structural part preparation, engineering sites and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to additive manufacturing field, more specifically, the utility model relates to a kind of substrate preheating device of alloy laser additive manufacturing. BACKGROUND

[0002] High-temperature alloy has wide application in aerospace, gas turbine and other fields, but the alloy conventional forming process manufacturing is difficult, even cannot be processed, and laser additive manufacturing technology as a new type of high flexibility, digital manufacturing technology, makes it have wide application prospect in aerospace and national defense military industry, using laser additive manufacturing technology can realize the manufacturing of some difficult-to-machine materials and structures that cannot be prepared by traditional process, especially suitable for large thin-walled cavity structural parts.

[0003] But high-temperature alloy powder sintering forming process is prone to cause thermal stress and thermal deformation due to large temperature gradient of each part of the part, and then deformation and cracking of the part occur in the alloy laser additive manufacturing process, so that the alloy forming process is prone to crack, and the preparation is difficult. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of substrate preheating device of alloy laser additive manufacturing to preheat substrate, which can significantly improve the problems of part deformation and cracking in alloy laser additive manufacturing process, and has good application prospect in the field of large structural parts preparation and engineering site.

[0005] In order to realize these purposes and other advantages according to the utility model, a kind of substrate preheating device of alloy laser additive manufacturing is provided, comprising:

[0006] Base, the upper end has horizontal heating surface for placing substrate;

[0007] Heating assembly connected with the base to heat the horizontal heating surface;

[0008] Pressing plate, processing pattern is arranged on the upper end of the base, the pressing plate is detachably arranged on the upper end of the base, and the pressing plate and the base have a fixed cavity corresponding to the substrate.

[0009] Further, the substrate preheating device of alloy laser additive manufacturing, the heating assembly comprises:

[0010] Base plate;

[0011] Thermal conductive plate, arranged on the base plate, the lower end of the thermal conductive plate is provided with mounting groove;

[0012] PTC heating plate, arranged in the mounting groove.

[0013] Further, the alloy laser additive manufacturing substrate preheating device, the lower end of the heating plate is connected with a heat insulation plate, and the lower end of the heating plate is also provided with a positioning groove corresponding to the heating assembly, and the upper end of the heat conduction plate is attached to the top wall of the positioning groove.

[0014] Further, the alloy laser additive manufacturing substrate preheating device further comprises:

[0015] A thermocouple, the measuring end of which is connected with the PTC heating plate to measure the temperature of the PTC heating plate.

[0016] Further, the alloy laser additive manufacturing substrate preheating device, the base comprises:

[0017] A support;

[0018] A heating plate horizontally arranged on the support, the upper end of the heating plate being the horizontal heating surface.

[0019] Further, the alloy laser additive manufacturing substrate preheating device further comprises:

[0020] A fixing mechanism arranged on the base to fix the pressing plate on the base.

[0021] Further, the alloy laser additive manufacturing substrate preheating device, the pressing plate comprises two sub-plates, the lower end of the sub-plate being provided with a notch, and the two notches being spliced into a fixed cavity, and the fixing mechanism comprising two groups of fixing assemblies corresponding to the two sub-plates respectively.

[0022] Further, the alloy laser additive manufacturing substrate preheating device, the fixing assembly comprises:

[0023] A pressing block arranged above the base;

[0024] A driving unit connected with the pressing block to drive the pressing block to move downward to press the sub-plate.

[0025] Further, the alloy laser additive manufacturing substrate preheating device, the driving unit comprises:

[0026] A support block arranged on the base;

[0027] A telescopic lever connected with the base and connected with the pressing block, the telescopic lever driving the pressing block to move up and down, and the support block and the sub-plate are both provided with an opening corresponding to the telescopic lever.

[0028] Further, the alloy laser additive manufacturing substrate preheating device further comprises:

[0029] Two proximity sensors are arranged on the two support blocks respectively to detect whether the sub-plate is attached to the corresponding support block.

[0030] The base plate preheating device has the advantages that:

[0031] The base plate preheating device of the utility model fixes the base plate on the horizontal heating surface of the upper end of the base through the pressing plate, heats the horizontal heating surface through the heating assembly, uniformly heats the base plate through the horizontal heating surface, and realizes the preheating of the base plate. The processing pattern is arranged on the base plate, and the base plate is convenient for printing in the later period. After the preheated base plate is used for alloy laser additive manufacturing, the problems such as part deformation and cracking in the alloy laser additive manufacturing process can be significantly improved, and the base plate has good application prospect in the fields of large structure preparation and engineering site.

[0032] The other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by the person skilled in the art through the research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The structure schematic view of the base plate preheating device is shown in the utility model;

[0034] Figure 2 The structure schematic view of the base plate preheating device after removing the pressing plate is shown in the utility model;

[0035] Figure 3 The structure schematic view of the pressing plate is shown in the utility model;

[0036] Figure 4 The structure schematic view of the pressing plate is shown in the utility model;

[0037] Figure 5 The structure schematic view of the heating plate is shown in the utility model;

[0038] Figure 6 The structure schematic view of the heating assembly is shown in the utility model;

[0039] Among them, the sign represents:

[0040] Pressing plate 1;Support 2;Heating plate 3;Heat insulation plate 4;Positioning groove 5;Bottom plate 6;Thermal conductive plate 7;Mounting groove 8;PTC heating plate 9;Thermocouple 10;Sub-plate 11;Fixed cavity 12;Pressing block 13;Support block 14;Extension lever 15;Proximity sensor 16;Base plate 17;Processing pattern 18. DETAILED DESCRIPTION

[0041] The utility model makes further detailed description in combination with the embodiment, to enable the person skilled in the art to implement according to the description.

[0042] It should be noted that in the description of the utility model, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0043] As Figures 1-3 shown, the embodiment of the utility model provides a kind of substrate preheating device of alloy laser additive manufacturing, comprising:

[0044] Base, its upper end has horizontal heating surface for placing substrate 17;

[0045] Heating assembly, it is connected with the base, to heat the horizontal heating surface;

[0046] Pressing plate 1, its upper end is provided with processing pattern 18, the pressing plate 1 is detachably arranged on the upper end of the base, and the pressing plate 1 has fixed cavity 12 corresponding to substrate between the base.

[0047] In the embodiment, substrate 17 is placed horizontally on the horizontal heating surface, then pressing plate 1 is installed on the upper end of the base, substrate 17 is fixed in fixed cavity 12 by pressing plate 1, then the horizontal heating surface is uniformly heated by heating assembly, substrate 17 is uniformly heated by the horizontal heating surface, and the preheating of substrate 17 is realized.Pressing plate 1 is provided with through slot to form processing pattern 18 on its upper end according to the shape and position of the structure to be printed, and printing is completed on substrate through processing pattern 18 after preheating is completed.

[0048] Preferably, as another embodiment of the utility model, as Figure 6 shown, the heating assembly comprises:

[0049] Bottom plate 6;

[0050] Thermal conductive plate 7, which is arranged on the bottom plate 6, the lower end of the thermal conductive plate 7 is provided with a mounting groove 8;

[0051] PTC heating plate 9, which is arranged in the mounting groove 8.

[0052] In the embodiment, the bottom plate 6 is placed on the heat insulation plate 4, the PTC heating plate 9 is arranged in the mounting groove 8 at the lower end of the heat conduction plate 7, the bottom plate 6 seals the mounting groove 8, the PTC heating plate 9 is fixed, the upper end of the heat conduction plate 7 is attached to the top wall of the positioning groove 5, and the PTC heating plate 9 is heated to uniformly heat the heating plate 3.

[0053] Preferably, as another embodiment of the utility model, Figures 2-3 As shown in the figure, it further comprises:

[0054] A thermocouple, a measuring end of which is connected with the PTC heating plate to measure the temperature of the PTC heating plate.

[0055] In the embodiment, the thermocouple 10 is arranged, the sensing end of the thermocouple 10 extends into the heating plate 3 to measure the temperature of the heating plate 3, so that the power of the PTC heating plate 9 can be adjusted according to actual needs, and the temperature of the heating plate 3 is adjusted to the temperature required by the preheating of the substrate 17.

[0056] Preferably, as another embodiment of the utility model, the base comprises:

[0057] A support 2;

[0058] A heating plate 3, which is horizontally arranged on the support 2, and the upper end of the heating plate 3 constitutes the horizontal heating surface.

[0059] In the embodiment, as shown in the figure, the heat insulation plate 4 is connected to the lower end of the heating plate 3, the heat insulation plate 4 is placed on the support 2, as shown in the figure, the middle part of the lower end of the heating plate 3 is provided with the positioning groove 5 corresponding to the heating assembly, the heating assembly is arranged in the positioning groove 5, the upper end of the heating plate 3 constitutes the horizontal heating surface, the heating plate 3 is heated by the heating assembly, and the substrate 17 can be heated by the horizontal heating surface. Figure 2 Figure 5 Preferably, as another embodiment of the utility model, it further comprises:

[0060] A fixing mechanism, which is arranged on the base to fix the pressing plate 1 on the base.

[0061] In the embodiment, the pressing plate 1 is fixed on the base by the fixing mechanism, specifically, the pressing plate 1 comprises two sub-plates 11, the lower end of the sub-plate 11 is provided with a notch, the two notches are spliced into a fixed cavity 12, and the fixing mechanism comprises two groups of fixing assemblies corresponding to the two sub-plates 11 respectively.

[0062] In the embodiment, as shown in the figure, the heat insulation plate 4 is connected to the lower end of the heating plate 3, the heat insulation plate 4 is placed on the support 2, as shown in the figure, the middle part of the lower end of the heating plate 3 is provided with the positioning groove 5 corresponding to the heating assembly, the heating assembly is arranged in the positioning groove 5, the upper end of the heating plate 3 constitutes the horizontal heating surface, the heating plate 3 is heated by the heating assembly, and the substrate 17 can be heated by the horizontal heating surface.

[0063] In the embodiment, as shown in the figure, the heat insulation plate 4 is connected to the lower end of the heating plate 3, the heat insulation plate 4 is placed on the support 2, as shown in the figure, the middle part of the lower end of the heating plate 3 is provided with the positioning groove 5 corresponding to the heating assembly, the heating assembly is arranged in the positioning groove 5, the upper end of the heating plate 3 constitutes the horizontal heating surface, the heating plate 3 is heated by the heating assembly, and the substrate 17 can be heated by the horizontal heating surface. Figure 4 ​As shown, the gaps at the lower ends of the two sub-panels 11 are spliced into a fixing cavity 12, the base plate 17 is placed on the heating plate 3, the pressing plate 1 is placed on the upper end of the base, the pressing plate 1 is fixed by the fixing mechanism, and the base plate 17 is located in the fixing cavity 12, at this time, the base plate 17 can be fixed on the heating plate 3.

[0064] Preferably, as another embodiment of the utility model, the fixing assembly comprises:

[0065] The pressing block 13 is arranged above the base;

[0066] The driving unit is connected with the pressing block 13 to drive the pressing block 13 to move downward to press the sub-panels 11.

[0067] In this embodiment, the driving unit drives the pressing block 13 to move upward above the base, at this time, the pressing plate 1 can be placed on the upper end of the base or removed, the driving unit drives the pressing block 13 to move downward to press the sub-panels 11, at this time, the sub-panels 11 can be fixed on the upper end of the base.

[0068] Preferably, as another embodiment of the utility model, the driving unit comprises:

[0069] The support block 14 is arranged on the base;

[0070] The telescopic rod 15 is connected with the base and the pressing block 13, the telescopic rod 15 drives the pressing block 13 to move up and down, and the support block 14 and the sub-panels 11 are both provided with openings corresponding to the telescopic rod 15.

[0071] In this embodiment, the support block 14 is flush with the upper end of the heating plate 3, and the two support the sub-panels 11 together, and the openings corresponding to the telescopic rod 15 are arranged on the support block 14 and the sub-panels 11, the telescopic rod of the telescopic rod 15 passes through the openings on the support block 14 and the pressing block 13, and drives the pressing block 13 to move up and down in the process of moving up and down, and the openings on the sub-panels 11 also facilitate the placement of the sub-panels 11 on the base or the removal of the sub-panels 11 from the base.

[0072] Preferably, as another embodiment of the utility model, further comprising:

[0073] The two proximity sensors 16 are arranged on the two support blocks 14 respectively to detect whether the sub-panels 11 are attached to the corresponding support blocks 14.

[0074] In this embodiment, the proximity sensors 16 are arranged on the support blocks 14 to detect the position of the sub-panels 11, and determine whether the sub-panels 11 are attached to the corresponding support blocks 14, after attachment, the telescopic rod 15 drives the pressing block 13 to move downward to fix the sub-panels 11.

[0075] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the embodiments shown and described herein.

Claims

1. An alloy laser additive manufacturing substrate preheating apparatus, characterized by, The utility model relates to a substrate processing device, which comprises: a base with a horizontal heating surface at its upper end for placing a substrate; a heating assembly connected to the base for heating the horizontal heating surface; a pressing plate provided with a processing pattern, which is detachably arranged on the upper end of the base and has a fixing cavity corresponding to the substrate between the pressing plate and the base; wherein the base comprises: a support; a heating plate horizontally arranged on the support, and the upper end of the heating plate is the horizontal heating surface.

2. A substrate preheating device for laser additive manufacturing of an alloy as claimed in claim 1, characterized in that The heating assembly comprises: a bottom plate; a heat-conducting plate arranged on the bottom plate, and the lower end of the heat-conducting plate is provided with a mounting groove; a PTC heating plate arranged in the mounting groove.

3. A substrate preheating device for laser additive manufacturing of an alloy as claimed in claim 2, wherein The lower end of the heating plate is connected with an insulating plate, and the lower end of the heating plate is also provided with a positioning groove corresponding to the heating assembly, and the upper end of the heat-conducting plate is attached to the top wall of the positioning groove.

4. A substrate preheating device for laser additive manufacturing of an alloy as claimed in claim 2, wherein Further comprising: a thermocouple with a measuring end connected to the PTC heating plate to measure the temperature of the PTC heating plate.

5. The alloy laser additive manufactured substrate preheating apparatus of claim 1, wherein, Further comprising: a fixing mechanism arranged on the base to fix the pressing plate on the base.

6. A substrate preheating device for laser additive manufacturing of an alloy as claimed in claim 5, wherein The pressing plate comprises two sub-plates, and the lower end of each sub-plate is provided with a notch, and the two notches are spliced to form the fixing cavity, and the fixing mechanism comprises two groups of fixing assemblies corresponding to the two sub-plates respectively.

7. A substrate preheating device for laser additive manufacturing of an alloy as claimed in claim 6, wherein The fixing assembly comprises: a pressing block arranged above the base; a driving unit connected to the pressing block to drive the pressing block to move downward to press the sub-plate.

8. A substrate preheating device for laser additive manufacturing of an alloy as claimed in claim 7, wherein The driving unit comprises: a support block arranged on the base; a telescopic rod connected to the base and connected to the pressing block, which drives the pressing block to move up and down, and the support block and the sub-plate are both provided with an opening corresponding to the telescopic rod.

9. A substrate preheating device for laser additive manufacturing of an alloy as claimed in claim 8, wherein Further comprising: two proximity sensors arranged on the two support blocks respectively to detect whether the sub-plate is attached to the corresponding support block.

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