Additive manufacturing powder metallurgy sintering furnace

Abstract

The utility model relates to the technical field of powder metallurgy sintering furnaces, and aims to solve the problems that a furnace door is difficult to open and close and the sealing performance of the furnace door is poor in the conventional additive manufacturing powder metallurgy sintering furnace. The utility model provides an additive manufacturing powder metallurgy sintering furnace which comprises a furnace door, a furnace body and a plurality of connecting mechanisms. The connecting mechanism comprises a pair of flange lug plates, a magnetic attraction assembly and a telescopic assembly. The furnace door is connected with the furnace body through the pair of flange lug plates; a first through hole and a second through hole are respectively formed in the pair of flange lug plates; one end of the magnetic attraction assembly penetrates into the first through hole; one end of the telescopic assembly penetrates into the second through hole and extends towards the magnetic attraction assembly. According to the utility model, the problem that the furnace door is pushed away from the furnace body by reverse thrust after electromagnetic attraction in the prior art is solved, the opening and closing operation of the furnace door is reduced, and the closure after closing is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy sintering furnaces, and in particular to an additive manufacturing powder metallurgy sintering furnace. Background Art

[0002] Additive manufacturing sintering furnaces are mainly used in the sintering process of additive manufacturing to solidify and sinter metal material embryos. In the prior art, industrial furnaces are usually used, but there are problems such as difficulty in opening and closing the furnace door and the furnace body, and poor sealing.

[0003] To solve such problems, a patent with announcement number CN213657474U discloses a sintering furnace for metal 3D printing products. Specifically, by adopting an electromagnetic valve, when the electromagnet is energized, the electromagnet will suck the electromagnet suction block, thereby sucking the furnace door tightly; when the furnace body is evacuated, the furnace door will be pressed by atmospheric pressure; as the furnace door gets closer and closer to the furnace body flange, the electromagnet suction block will be pressed into the electromagnet suction block seat, and will not block the furnace door flange from approaching the furnace body flange, thereby improving the sealing performance of the furnace door;

[0004] However, when the furnace body is evacuated, the furnace door is pressed into the furnace body by the atmospheric pressure, but at the same time, the electromagnet suction block is pressed into the electromagnet suction block seat in the direction of the furnace door, thereby generating a thrust on the furnace door away from the furnace body. As a result, the furnace door flange and the furnace body flange may not be aligned during vacuuming, making it difficult to open and close the furnace door, and the sealing of the connection between the furnace door and the furnace body may be poor even after alignment and fixation.

[0005] Based on the above description, there is an urgent need for an additive manufacturing powder metallurgy sintering furnace that is easy to open and close the furnace door quickly and has good sealing performance. Utility Model Content

[0006] The utility model aims to provide an additive manufacturing powder metallurgy sintering furnace, aiming to solve the technical problems of the existing additive manufacturing powder metallurgy sintering furnace, such as difficulty in opening and closing the furnace door and poor sealing performance at the furnace door.

[0007] The embodiments of the present invention are implemented by the following technical solutions:

[0008] A powder metallurgy sintering furnace for additive manufacturing comprises a furnace door, a furnace body and a plurality of connecting mechanisms; the connecting mechanisms comprise a pair of flange ear plates, a magnetic attraction component and a telescopic component; the furnace door is connected to the furnace body via a pair of flange ear plates; the pair of flange ear plates are respectively provided with a first through hole and a second through hole; one end of the magnetic attraction component passes through the first through hole; one end of the telescopic component passes through the second through hole and extends toward the magnetic attraction component.

[0009] Preferably, the magnetic attraction component includes a first box body and a first magnetic attraction component; the first magnetic attraction component is arranged inside the first box body; the first magnetic attraction component is arranged inside one end of the first box body and is connected to the flange ear plate through multiple first screw plates; the other open end of the first box body passes through the first through-hole and extends to the telescopic component.

[0010] Preferably, the telescopic assembly comprises a second box body and a second magnetic member; the opening end of the second box body penetrates into the second through hole and is telescopically connected to the first magnetic member to form the second magnetic member.

[0011] Preferably, the second magnetic attraction member includes an electromagnet attraction block, a plurality of spring columns and a plurality of slide grooves; the plurality of slide grooves are arranged at intervals on the inner wall of the second box body; one end of the spring column is connected to the second box body; a sliding component is provided at the other end of the spring column; the sliding component is connected to the electromagnet attraction block; the sliding component is embedded in the slide groove at a top end close to the electromagnet attraction block.

[0012] Preferably, a pair of building blocks are provided opposite to each other at the slot of the slide groove; the sliding assembly includes a connecting block and a T-shaped slider; the horizontal end of the T-shaped slider passes through the slide groove and is mounted on the building block; the vertical end of the T-shaped slider passes through the slot and is connected to the connecting block; the end of the connecting block away from the T-shaped slider is clamped between the spring column and the second magnetic attraction member.

[0013] Preferably, the end of the electromagnet suction block away from the spring column is provided with a convex portion; the first magnetic suction member is provided with a buffer groove for the convex portion to be embedded in; and a buffer spring is provided in the buffer groove.

[0014] Preferably, one end of the first box body that passes through the first through hole is engaged with the second box body.

[0015] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0016] The utility model connects the furnace door and the outer edge of the furnace body through a pair of flange ear plates; wherein, in order to ensure the tightness of the pair of flange ear plates and to facilitate strengthening the sealing of the furnace door and the furnace body, a magnetic attraction force is further applied to the telescopic assembly through the magnetic attraction assembly to make it extend toward the magnetic attraction assembly, thereby facilitating the preliminary alignment and fixation of the pair of flange ear plates, so that after the interior of the furnace body is further evacuated, the furnace door is pushed toward the furnace body under atmospheric pressure, and then the pair of flange ear plates are fully and tightly fixed, thereby improving the sealing of the furnace door and the furnace body, and preventing the problem of reverse thrust of the magnetic fixing part after evacuation affecting the sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 for Figure 1 A partial cross-sectional view of the middle connecting mechanism;

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of the local structure A;

[0021] Figure 4 for Figure 3 An enlarged schematic diagram of the local structure B;

[0022] Figure 5 for Figure 4 Schematic diagram of the connection structure between the middle slide and the magnetic suction component.

[0023] Icons: 1-furnace door, 2-furnace body, 3-connecting mechanism, 31-flange ear plate, 32-magnetic assembly, 321-first box body, 322-first magnetic part, 33-telescopic assembly, 331-second box body, 332-second magnetic part, 3321-electromagnet suction block, 3322-spring column, 3323-slide groove, 4-first through hole, 5-second through hole, 6-first screw plate, 7-sliding assembly, 71-connecting block, 72-T-type slider, 8-buffer spring. DETAILED DESCRIPTION

[0024] Example 1

[0025] See also Figures 1 to 5 The utility model provides the following technical solutions: an additive manufacturing powder metallurgy sintering furnace, which is suitable for the situation where the sintering furnace door is closed.

[0026] Specifically, Figure 1 and Figure 2 As shown, an additive manufacturing powder metallurgy sintering furnace includes a furnace door 1, a furnace body 2 and a plurality of connecting mechanisms 3; the connecting mechanism 3 includes a pair of flange ear plates 31, a magnetic attraction component 32 and a telescopic component 33; the furnace door 1 is connected to the furnace body 2 through a pair of flange ear plates 31; the pair of flange ear plates 31 are respectively provided with a first through hole 4 and a second through hole 5; one end of the magnetic attraction component 32 passes through the first through hole 4; one end of the telescopic component 33 passes through the second through hole 5 and extends to the magnetic attraction component 32.

[0027] In the present embodiment, the furnace door 1 and the outer edge of the furnace body 2 are connected by a pair of flange ear plates 31; wherein, in order to ensure the tightness of the pair of flange ear plates 31, so as to enhance the sealing of the furnace door 1 and the furnace body 2, a magnetic attraction force is further applied to the telescopic assembly 33 by the magnetic attraction assembly 32, so that it extends toward the magnetic attraction assembly 32, thereby facilitating the preliminary alignment and fixation of the pair of flange ear plates 31, so that after the interior of the furnace body 2 is further evacuated, the furnace door 1 is pushed toward the furnace body 2 under atmospheric pressure, and then the pair of flange ear plates 31 are fully and tightly fixed, thereby improving the sealing of the furnace door 1 and the furnace body 2, and there will be no problem of the reverse thrust of the magnetic fixing part after evacuation affecting the sealing.

[0028] Specifically, Figure 2 and Figure 3 As shown, the magnetic attraction assembly 32 includes a first box body 321 and a first magnetic attraction member 322; the first magnetic attraction member 322 is disposed inside the first box body 321; one end of the first box body 321 is provided with the first magnetic attraction member 322 and is connected to the flange ear plate 31 through a plurality of first screw plates 6; the other open end of the first box body 321 penetrates the first through hole 4 and extends to the telescopic assembly 33. The telescopic assembly 33 includes a second box body 331 and a second magnetic attraction member 332; the open end of the second box body 331 penetrates the second through hole 5 and is telescopically connected to the first magnetic attraction member 322 with the second magnetic attraction member 332. The second magnetic attraction member 332 includes an electromagnet attraction block 3321, a plurality of spring columns 3322 and a plurality of slide grooves 3323; the plurality of slide grooves 3323 are arranged at intervals on the inner wall of the second box body 331; one end of the spring column 3322 is connected to the second box body 331; a sliding component 7 is provided at the other end of the spring column 3322; the sliding component 7 is connected to the electromagnet attraction block 3321; a top end of the sliding component 7 close to the electromagnet attraction block 3321 is embedded in the slide groove 3323.

[0029] In this embodiment, one end of the electromagnet suction block 3321 is connected to the inner wall of the second box body 331 through the spring column 3322; the other end of the electromagnet suction block 3321 is magnetically attracted by the electromagnetic suction groove in the first magnetic suction member 322, and then, under the magnetic attraction of the electromagnetic suction groove in the first magnetic suction member 322, the electromagnet suction block 3321 is sucked into the groove cavity of the electromagnetic suction groove, and then, the second box body 331 is close to the first box body 321. After the two are close, they are respectively screwed and fastened with the corresponding flange ear plate 31 through the first screw plate 6; wherein, a transverse slot is provided in the top or bottom of one of the second box body 331 and the first box body 321, and an elastic block is correspondingly provided in the other. After the elastic block is inserted into the transverse slot, the transverse slot still reserves a buffer space, so that the two box bodies can be initially fixed and the distance can be shortened during subsequent magnetic attraction and fastening.

[0030] Specifically, Figure 3 and Figure 4As shown, the end of the electromagnet suction block 3321 away from the spring column 3322 is provided with a convex portion; the first magnetic suction member 322 is provided with a buffer groove for the convex portion to be embedded; and a buffer spring 8 is provided in the buffer groove.

[0031] In this embodiment, the electromagnet suction block 3321 is connected to the second box body 331 through a plurality of spring columns 3322, which is convenient for cooperating with the buffer spring 8 to buffer the electromagnet suction block 3321, so that after the interior of the furnace body 2 is evacuated, under the thrust of atmospheric pressure, the distance between the furnace door 1 and the furnace body 2 is further shortened, and due to the existence of internal buffering, the reverse thrust is avoided, and the sealing between the furnace door 1 and the furnace body 2 is fully improved. Among them, the buffer groove with the convex part embedded can not only play a role in limiting the buffer spring 8, but also expand the overall magnetic suction area and improve the magnetic suction effect.

[0032] Specifically, Figure 4 and Figure 5 As shown, a pair of building blocks are arranged opposite to each other at the notch of the slide slot 3323; the sliding assembly 7 includes a connecting block 71 and a T-shaped slider 72; the horizontal end of the T-shaped slider 72 passes through the slide slot 3323 and is built on the building block; the vertical end of the T-shaped slider 72 passes through the notch and is connected to the connecting block 71; the end of the connecting block 71 away from the T-shaped slider 72 is clamped between the spring column 3322 and the second magnetic attraction member 332.

[0033] In this embodiment, the slide groove 3323 is arranged inside the second box body 331, and one end of the T-shaped slider 72 is placed between a pair of blocks on the slide groove 3323. Then, under the action of magnetic attraction, the electromagnet suction block 3321 can slide linearly toward the electromagnetic suction groove in the first magnetic attraction member 322, thereby improving the accuracy of the protrusion of the electromagnet suction block 3321 being embedded in the buffer groove.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An additive manufacturing powder metallurgy sintering furnace, comprising a furnace door (1) and a furnace body (2), characterized in that: It also includes a plurality of connection mechanisms (3); the connection mechanisms (3) include a pair of flange ear plates (31), a magnetic attraction component (32) and a telescopic component (33); the furnace door (1) is connected to the furnace body (2) via the pair of flange ear plates (31); the pair of flange ear plates (31) are respectively provided with a first through hole (4) and a second through hole (5); one end of the magnetic attraction component (32) passes through the first through hole (4); one end of the telescopic component (33) passes through the second through hole (5) and extends toward the magnetic attraction component (32).

2. The additive manufacturing powder metallurgy sintering furnace according to claim 1, characterized in that: The magnetic attraction component (32) comprises a first box body (321) and a first magnetic attraction member (322); the first magnetic attraction member (322) is arranged inside the first box body (321); the first magnetic attraction member (322) is arranged inside one end of the first box body (321) and is connected to the flange ear plate (31) through a plurality of first screw plates (6); the other open end of the first box body (321) penetrates into the first through hole (4) and extends toward the telescopic component (33).

3. The additive manufacturing powder metallurgy sintering furnace according to claim 2, characterized in that: The telescopic component (33) comprises a second box body (331) and a second magnetic attraction member (332); the opening end of the second box body (331) penetrates into the second through hole (5) and is telescopically connected to the first magnetic attraction member (322) to form the second magnetic attraction member (332).

4. The additive manufacturing powder metallurgy sintering furnace according to claim 3, characterized in that: The second magnetic attraction member (332) comprises an electromagnet attraction block (3321), a plurality of spring columns (3322) and a plurality of slide grooves (3323); the plurality of slide grooves (3323) are arranged at intervals on the inner side wall of the second box body (331); one end of the spring column (3322) is connected to the second box body (331); a sliding component (7) is arranged at the other end of the spring column (3322); the sliding component (7) is connected to the electromagnet attraction block (3321); a top end of the sliding component (7) close to the electromagnet attraction block (3321) is embedded in the slide groove (3323).

5. The powder metallurgy sintering furnace for additive manufacturing according to claim 4, characterized in that: The notch of the slide groove (3323) is provided with a pair of blocks opposite to each other; the sliding assembly (7) comprises a connecting block (71) and a T-shaped slider (72); the horizontal end of the T-shaped slider (72) passes through the slide groove (3323) and is mounted on the building block; the vertical end of the T-shaped slider (72) passes through the notch and is connected to the connecting block (71); the end of the connecting block (71) away from the T-shaped slider (72) is clamped between the spring column (3322) and the second magnetic attraction member (332).

6. The additive manufacturing powder metallurgy sintering furnace according to claim 4 or 5, characterized in that: The electromagnet suction block (3321) is provided with a convex portion at one end away from the spring column (3322); the first magnetic suction member (322) is provided with a buffer groove for the convex portion to be embedded; and a buffer spring (8) is provided in the buffer groove.

7. The powder metallurgy sintering furnace for additive manufacturing according to any one of claims 3 to 5, characterized in that: One end of the first box body (321) that passes through the first through hole (4) is snap-fitted to the second box body (331).

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