Convenient and fast sintered plate leveling and heating structure and 3D printing equipment

Abstract

The utility model discloses a convenient leveling and heating structure for a sintered plate. The convenient leveling and heating structure comprises the sintered plate, a supporting plate, a heating plate, a sealing plate, a transition plate, a leveling mechanism, a first sealing mechanism, a second sealing mechanism and an elastic mechanism, the sintered plate, the supporting plate and the transition plate are sequentially connected in an overlapped mode from top to bottom. The heating plate and the elastic mechanism are located in the hollow structure of the supporting plate. The heating plate is connected with the transition plate through an elastic mechanism, the upper surface of the heating plate is attached to the lower surface of the sintering plate through a sealing plate, and the elastic mechanism enables the heating plate to tightly press the sealing plate; the sintering plate is connected with the supporting plate through the leveling mechanism. The utility model further discloses 3D printing equipment which comprises the convenient leveling and heating structure for the sintered plate. According to the utility model, the sintering plate can be leveled conveniently, quickly and directly, the heat of the heating plate can be transmitted to the sintering plate smoothly, the heating plate does not need to be leveled firstly and then the sintering plate is installed, and the workload of leveling the sintering plate is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of additive manufacturing, and specifically relates to a sintering plate convenient leveling and heating structure and 3D printing equipment. Background Art

[0002] The basic process of selective laser sintering is: first level the sintering plate, then turn on the heating function of the heating plate and preheat the sintering plate to a certain temperature, the powder feeding device delivers a certain amount of powder to the work surface, the powder spreading scraper spreads a layer of powder material on the upper surface of the sintering plate, and the galvanometer system controls the laser to scan the solid part of the powder layer according to the cross-sectional contour of the layer, so that the powder melts and bonds with the formed part below; when a layer of cross section is sintered, the workbench drops a layer of thickness, and the powder spreading roller spreads a layer of uniform and dense powder on it, and scans and sinters a new layer of cross section, and after several layers of scanning and superposition, the entire prototype manufacturing is completed.

[0003] In the above technology, it is necessary to ensure the flatness of the sintering plate and to preheat it normally, so that the powder can be fully sintered on the sintering plate and the connection strength between the workpiece and the sintering plate can be guaranteed. Figure 6 As shown, the existing piston structure includes a sintering plate 1', a heating plate 2', a transition plate 3' and a piston bottom plate 4' which are overlapped and connected in sequence from top to bottom, wherein the leveling mechanism is arranged on the transition plate 3' below the heating plate 2'. Each time the leveling is performed, the sintering plate 1' needs to be removed first, and the heating plate 2' needs to be leveled by the leveling mechanism before the sintering plate 1' is installed, i.e., the leveling of the sintering plate 1' is achieved by leveling the heating plate 2'. Such an operation brings many inconveniences to the leveling, and the tolerances of the heating plate 2' and the sintering plate 1' are accumulated. Although the heating plate has been leveled, the final flatness of the sintering plate may not meet the requirements, which will result in the need for leveling again, thereby affecting the production efficiency of the equipment. Utility Model Content

[0004] The utility model provides a convenient leveling and heating structure for a sintering plate, which can not only conveniently, quickly and directly level the sintering plate, but also ensure that the heat of the heating plate is smoothly transmitted to the sintering plate. There is no need to level the heating plate before installing the sintering plate, which saves the workload of leveling the sintering plate and reduces the processing accuracy of the heating plate and the transition plate, thereby reducing the cost of the entire structure and making production, installation, and after-sales maintenance more convenient.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a convenient leveling and heating structure for a sintering plate, comprising a sintering plate, a support plate, a heating plate, a sealing plate, a transition plate, a leveling mechanism, a first sealing mechanism, a second sealing mechanism and an elastic mechanism; the support plate is a hollow structure; the sintering plate, the support plate and the transition plate are sequentially overlapped and connected from top to bottom; the heating plate and the elastic mechanism are located in the hollow structure of the support plate;

[0006] The heating plate is connected to the transition plate through the elastic mechanism, the upper surface of the heating plate is in contact with the lower surface of the sintering plate through the sealing plate, the elastic mechanism enables the heating plate to press the sealing plate, and the sealing plate is a flexible thin plate;

[0007] The sintering plate and the support plate are sealed by the first sealing mechanism, and the sealing plate and the support plate are sealed by the second sealing mechanism; the sintering plate is connected to the support plate by the leveling mechanism, and the leveling mechanism is used for leveling the sintering plate relative to the support plate.

[0008] Furthermore, the first sealing mechanism includes a first sealing ring, the upper surface of the support plate is provided with a first sealing groove, and the first sealing ring is installed in the first sealing groove.

[0009] Furthermore, the second sealing mechanism includes a second sealing ring and a sealing pressure plate, a step is provided above the hollow inner wall of the support plate; the sealing pressure plate is a hollow structure; the edges of the sealing plate are bent and pressed against the step by the sealing pressure plate, the sealing pressure plate is connected to the support plate, the support plate is provided with a second sealing groove at the step, and the second sealing ring is installed in the second sealing groove.

[0010] Furthermore, a plurality of circles of the second sealing grooves are provided at the step, and the plurality of circles of the second sealing grooves are concentrically arranged, and the second sealing ring is installed in each circle of the second sealing grooves.

[0011] Furthermore, the elastic mechanism includes a plurality of disc springs and a plurality of screws, each disc spring is equipped with a corresponding screw, the disc spring is located between the lower surface of the heating plate and the upper surface of the transition plate, and the heating plate, disc spring and transition plate are connected by the screws.

[0012] Furthermore, when the elastic mechanism is in a free state, the upper surface of the heating plate is 2-3 mm higher than the upper surface of the supporting plate.

[0013] Furthermore, when the elastic mechanism is in a free state, the heating plate can float up and down and the floating distance range is 4-6 mm.

[0014] Furthermore, the leveling mechanism includes a plurality of set screws and a plurality of locking screws, and each set screw is equipped with a corresponding locking screw; the sintering plate is provided with a number of second threaded through holes equal to the number of the locking screws, and a number of second threaded through holes equal to the number of the set screws; the support plate is provided with a number of threaded holes equal to the number of the locking screws; the locking screw is installed at the first threaded through hole and the threaded hole to connect the sintering plate and the support plate; the set screw is installed at the second threaded through hole, and the set screw can pass through the second threaded through hole and be tightened on the upper surface of the support plate.

[0015] Furthermore, the sintering plate convenient leveling and heating structure also includes heat insulation cotton arranged on the upper surface of the transition plate, and the size of the heat insulation cotton is larger than the size of the hollow structure of the support plate.

[0016] A 3D printing device comprises the sintering plate convenient leveling and heating structure, and also comprises a piston bottom plate and a lifting mechanism, wherein the transition plate is connected to the lifting mechanism through the piston bottom plate.

[0017] Beneficial effects of the utility model: the heating plate of the utility model is pressed against the sintering plate through the sealing plate under the action of the elastic mechanism, and the sealing plate is a flexible thin plate, which can make up for the gap between the sintering plate and the heating plate after leveling, and can ensure that the heat of the heating plate is smoothly transmitted to the sintering plate. Moreover, the leveling mechanism is arranged on the sintering plate, and the sintering plate can be directly leveled without leveling the heating plate first and then installing the sintering plate, which saves the workload of leveling the sintering plate, and reduces the processing accuracy of the heating plate and the transition plate, thereby reducing the cost of the whole structure, making production installation and after-sales maintenance more convenient. At the same time, under the action of the first sealing mechanism and the second sealing mechanism, double sealing is achieved, with good sealing effect and high reliability, ensuring that the powder will not enter the hollow structure of the support plate and cause a short circuit in the heating plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 for Figure 1 A top view of

[0021] Figure 3 for Figure 2AA section view in;

[0022] Figure 4 for Figure 2 BB section view in;

[0023] Figure 5 for Figure 3 The enlarged view of point C in the figure;

[0024] Figure 6 It is a cross-sectional view of the prior art.

[0025] The above reference numerals:

[0026] 1. Sintering plate; 2. Support plate; 3. Transition plate; 4. Heating plate; 40. Countersunk hole; 5. Sealing plate; 6. Elastic mechanism; 60. Disc spring; 61. Screw; 70. Sealing pressure plate; 71. Second sealing ring; 8. First sealing ring; 9. Insulation cotton; 10. Leveling mechanism; 101. Locking screw; 102. Set screw; 11. Piston base plate. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0028] like Figure 1-Figure 5 As shown, the present embodiment provides a convenient leveling and heating structure for a sintering plate, comprising a sintering plate 1, a support plate 2, a heating plate 4, a sealing plate 5, a transition plate 3, a leveling mechanism 10, a first sealing mechanism, a second sealing mechanism and an elastic mechanism 6; the support plate 2 is a hollow structure; the sintering plate 1, the support plate 2 and the transition plate 3 are overlapped and connected in sequence from top to bottom; the heating plate 4 and the elastic mechanism 6 are located in the hollow structure of the support plate 2.

[0029] The heating plate 4 is connected to the transition plate 3 through the elastic mechanism 6. The upper surface of the heating plate 4 is in contact with the lower surface of the sintering plate 1 through the sealing plate 5. The elastic mechanism 6 enables the heating plate 4 to press the sealing plate 5. The sealing plate 5 is a flexible thin plate.

[0030] The sintering plate 1 and the support plate 2 are sealed by the first sealing mechanism, and the sealing plate 5 and the support plate 2 are sealed by the second sealing mechanism; the sintering plate 1 is connected to the support plate 2 through the leveling mechanism 10, and the leveling mechanism 10 is used for leveling the sintering plate 1 relative to the support plate 2.

[0031] In this embodiment, the heating plate 4 is pressed against the sintering plate 1 through the sealing plate 5 under the action of the elastic mechanism 6, and the sealing plate 5 is a flexible thin plate, which can make up for the gap between the sintering plate 1 and the heating plate 4 after leveling, and can ensure that the heat of the heating plate 4 is smoothly transmitted to the sintering plate 1. In this embodiment, the leveling mechanism 10 is arranged on the sintering plate 1, and the sintering plate 1 can be directly leveled without leveling the heating plate 4 before installing the sintering plate 1, which saves the workload of leveling the sintering plate 1, and reduces the processing accuracy of the heating plate 4 and the transition plate 3, thereby reducing the cost of the whole structure, making production installation and after-sales maintenance more convenient. At the same time, under the action of the first sealing mechanism and the second sealing mechanism, double sealing is achieved, with good sealing effect and high reliability, ensuring that the powder will not enter the hollow structure of the support plate 2 and cause the heating plate 4 to short-circuit.

[0032] In this embodiment, when the elastic mechanism 6 is in a free state and the sintering plate 1 is not installed on the support plate 2, the heating plate 4 can float up and down, and the range of the distance that the heating plate 4 can float up and down is 4-6mm, preferably 5mm. And when the elastic mechanism 6 is in a free state, the upper surface of the heating plate 4 is 2-3mm higher than the upper surface of the support plate 2, preferably 2mm. Therefore, when the sintering plate 1 is installed on the support plate 2, the sintering plate 1 will cause the sealing plate 5 to deform, and the elastic mechanism 6 makes the heating plate 4 fit tightly on the sintering plate 1 through the sealing plate 5, so as to make up for the gap between the sintering plate 1 and the heating plate 4 after leveling, and ensure that the heat of the heating plate 4 is smoothly transferred to the sintering plate 1.

[0033] In this embodiment, the first sealing mechanism includes a first sealing ring 8, a first sealing groove is provided on the upper surface of the support plate 2, and the first sealing ring 8 is installed in the first sealing groove. The first sealing ring 8 realizes the end face sealing between the support plate 2 and the sintering plate 1, preventing the powder from entering the hollow structure of the support plate 2 and causing the heating plate 4 to short-circuit.

[0034] In this embodiment, it is further preferred that the second sealing mechanism includes a second sealing ring 71 and a sealing pressure plate 70, a step is provided above the hollow inner wall of the support plate 2; the sealing pressure plate 70 is a hollow structure; the edges of the sealing plate 5 are bent and pressed against the step by the sealing pressure plate 70, the sealing pressure plate 70 is connected to the support plate 2, the support plate 2 is provided with a second sealing groove at the step, and the second sealing ring 71 is installed in the second sealing groove. Under the action of the second sealing ring 71 and the sealing pressure plate 70, the sealing between the support plate 2 and the sealing plate 5 is realized, and combined with the first sealing mechanism, a secondary seal is achieved, with good sealing effect and high reliability. The sealing pressure plate 70 is connected to the support plate 2 by screws or bolts.

[0035] In this embodiment, preferably, the step is provided with multiple circles of the second sealing grooves, and the multiple circles of the second sealing grooves are concentrically arranged, and each circle of the second sealing grooves is installed with the second sealing ring 71. Under the action of the multiple second sealing rings 71, the sealing effect is further improved. In this embodiment, the second sealing groove is preferably two circles, and the specific number of circles depends on the actual situation.

[0036] In this embodiment, the elastic mechanism 6 includes a plurality of disc springs and a plurality of screws 61, each disc spring 60 is equipped with a corresponding screw 61, the disc spring 60 is located between the lower surface of the heating plate 4 and the upper surface of the transition plate 3, and the heating plate 4, the disc spring 60 and the transition plate 3 are connected by the screw 61. Specifically, the heating plate 4 is provided with a countersunk hole 40, and the screw head of the screw 61 is sunk in the countersunk hole 40 to ensure that the upper surface of the heating plate 4 can fit the sealing plate 5 tightly. The transition plate 3 is provided with a screw hole that matches the screw 61, and the screw 61 passes through the disc spring 60 and is connected to the screw hole on the transition plate 3, thereby connecting the heating plate 4, the disc spring 60 and the transition plate 3 together.

[0037] In this embodiment, the leveling mechanism 10 further preferably comprises a plurality of set screws 102 and a plurality of locking screws 101, and each set screw 102 is equipped with a corresponding locking screw 101; the sintering plate 1 is provided with the same number of second threaded through holes as the locking screws 101, and the same number of second threaded through holes as the set screws 102; the support plate 2 is provided with the same number of threaded holes as the locking screws 101; the locking screws 101 are installed at the first threaded through holes and the threaded holes to connect the sintering plate 1 and the support plate 2; the set screws 102 are installed at the second threaded through holes, and the set screws 102 can pass through the second threaded through holes and press against the upper surface of the support plate 2. When the sintering plate 1 is leveled, the gap between the sintering plate 1 and the support plate 2 is adjusted by the set screws 102. After the sintering plate 1 is leveled, the sintering plate 1 and the support plate 2 are fastened together by the locking screws 101.

[0038] In this embodiment, the sintering plate convenient leveling and heating structure further includes heat insulation cotton 9 provided on the upper surface of the transition plate 3, and the size of the heat insulation cotton 9 is larger than the size of the hollow structure of the support plate 2. The heat insulation cotton 9 plays a heat insulation role to prevent the heat generated by the heating plate 4 from being transferred to the bottom of the transition plate 3, and ensure that the heat is concentrated and transferred upward to the sintering plate 1.

[0039] A 3D printing device includes the sintering plate convenient leveling and heating structure, and also includes a piston bottom plate 11 and a lifting mechanism, wherein the transition plate 3 is connected to the lifting mechanism through the piston bottom plate 11. The piston bottom plate 11 and the transition plate 3 are connected together by fasteners such as screws or bolts, and the lifting mechanism is a conventional configuration structure of existing 3D printing devices, and the existing technology can be directly used, and no further elaboration is made on the details.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A convenient leveling and heating structure for a sintered plate, characterized in that: The invention comprises a sintering plate (1), a supporting plate (2), a heating plate (4), a sealing plate (5), a transition plate (3), a leveling mechanism (10), a first sealing mechanism, a second sealing mechanism and an elastic mechanism (6); the supporting plate (2) is a hollow structure; the sintering plate (1), the supporting plate (2) and the transition plate (3) are sequentially overlapped and connected from top to bottom; the heating plate (4) and the elastic mechanism (6) are located in the hollow structure of the supporting plate (2); The heating plate (4) is connected to the transition plate (3) via the elastic mechanism (6); the upper surface of the heating plate (4) is in contact with the lower surface of the sintering plate (1) via the sealing plate (5); the elastic mechanism (6) causes the heating plate (4) to press against the sealing plate (5); and the sealing plate (5) is a flexible thin plate; The sintering plate (1) and the support plate (2) are sealed by the first sealing mechanism, and the sealing plate (5) and the support plate (2) are sealed by the second sealing mechanism; the sintering plate (1) is connected to the support plate (2) by the leveling mechanism (10), and the leveling mechanism (10) is used for leveling the sintering plate (1) relative to the support plate (2).

2. The convenient leveling and heating structure for sintering plates according to claim 1, characterized in that: The first sealing mechanism comprises a first sealing ring (8), the upper surface of the support plate (2) is provided with a first sealing groove, and the first sealing ring (8) is installed in the first sealing groove.

3. The convenient leveling and heating structure for sintering plates according to claim 1, characterized in that: The second sealing mechanism comprises a second sealing ring (71) and a sealing pressure plate (70); a step is provided above the hollow inner wall of the support plate (2); the sealing pressure plate (70) is a hollow structure; the edges of the sealing plate (5) are bent and pressed against the step by the sealing pressure plate (70); the sealing pressure plate (70) is connected to the support plate (2); the support plate (2) is provided with a second sealing groove at the step, and the second sealing ring (71) is installed in the second sealing groove.

4. The convenient leveling and heating structure for sintering plates according to claim 3 is characterized in that: The step is provided with a plurality of circles of the second sealing grooves, and the plurality of circles of the second sealing grooves are arranged concentrically, and the second sealing ring (71) is installed in each circle of the second sealing grooves.

5. The convenient leveling and heating structure for sintering plates according to claim 1, characterized in that: The elastic mechanism (6) includes a plurality of disc springs and a plurality of screws (61), each disc spring (60) is equipped with a corresponding screw (61), the disc spring (60) is located between the lower surface of the heating plate (4) and the upper surface of the transition plate (3), and the heating plate (4), the disc spring (60) and the transition plate (3) are connected via the screws (61).

6. The convenient leveling and heating structure for sintering plates according to claim 1, characterized in that: When the elastic mechanism (6) is in a free state, the upper surface of the heating plate (4) is 2-3 mm higher than the upper surface of the support plate (2).

7. The convenient leveling and heating structure for sintering plates according to claim 1, characterized in that: When the elastic mechanism (6) is in a free state, the heating plate (4) can float up and down and the floating distance range is 4-6 mm.

8. The convenient leveling and heating structure for sintering plates according to claim 1, characterized in that: The leveling mechanism (10) comprises a plurality of set screws (102) and a plurality of locking screws (101), each set screw (102) being equipped with a corresponding locking screw (101); the sintering plate (1) is provided with the same number of first threaded through holes as the locking screws (101) and the same number of second threaded through holes as the set screws (102); The support plate (2) is provided with threaded holes having the same number as the locking screws (101); the locking screws (101) are installed at the first threaded through holes and the threaded holes to connect the sintering plate (1) and the support plate (2); the fixing screws (102) are installed at the second threaded through holes, and the fixing screws (102) can pass through the second threaded through holes and be pressed against the upper surface of the support plate (2).

9. The convenient leveling and heating structure for sintering plates according to claim 1, characterized in that: The convenient leveling and heating structure of the sintering plate (1) further comprises heat insulating cotton (9) arranged on the upper surface of the transition plate (3), and the size of the heat insulating cotton (9) is larger than the size of the hollow structure of the support plate (2).

10. A 3D printing device, characterized in that: It comprises the convenient leveling and heating structure for sintering plates as described in any one of claims 1 to 9, and also comprises a piston bottom plate (11) and a lifting mechanism, wherein the transition plate (3) is connected to the lifting mechanism via the piston bottom plate (11).

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