Continuous sintering furnace for powder metallurgy oil-retaining bearing

Abstract

The utility model discloses a continuous sintering furnace for powder metallurgy oil-retaining bearings, and particularly relates to the technical field of oil-retaining bearing processing, which comprises a furnace body, a bottom plate is fixedly arranged at the bottom of the furnace body, a furnace cover is arranged at the top of the bottom plate and positioned at one end of the furnace body, a moving seat is fixedly mounted at the bottom of the furnace cover, and a containing structure is arranged at one end of the furnace cover. The containing structure comprises two supporting beams, the two supporting beams are both fixedly installed at one end of the furnace cover, a screen frame is arranged between the two supporting beams, and rectangular openings are formed in the surfaces of the two supporting beams in a penetrating mode. In the process of sintering the powder metallurgy oil bearing blank, an operator can conveniently take and place the bearing blank, danger caused by operation in the furnace body in the process of taking and placing the bearing blank is avoided, the bearing blank can be in full contact with heat in the furnace body, and the sintering quality of the powder metallurgy oil bearing blank is improved. And the sintering uniformity and continuity are improved.

Description

Technical Field

[0001] This utility model relates to the field of oil-impregnated bearing processing technology, and more specifically, to a continuous sintering furnace for powder metallurgy oil-impregnated bearings. Background Technology

[0002] Powder metallurgy oil-impregnated bearings are sliding bearings made of porous materials with lubricating oil stored in their pores. These bearings are mainly made of metal powder through powder metallurgy and have a porous structure with lubricating oil stored in the pores. During the production and processing of powder metallurgy oil-impregnated bearings, the bearing blanks need to be placed in a continuous sintering furnace for sintering.

[0003] A search revealed that Chinese patent CN222133448U discloses a powder metallurgy sintering furnace. This structure allows for the circulation of cool air at each placement tray, and the back-and-forth oscillation of the air guide plate serves to sweep the air, enabling the workpieces on each placement tray to be cooled more evenly, resulting in better cooling effect and increased cooling rate.

[0004] However, in the existing continuous sintering furnace, the bearing blank is generally in a static state during the sintering process of powder metallurgy bearings, which makes it difficult to achieve the shaking effect. As a result, the heat of the bearing blank and the sintering furnace cannot be fully contacted, which affects the sintering effect and processing efficiency. In view of this, this utility model proposes a continuous sintering furnace for powder metallurgy oil-impregnated bearings. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a continuous sintering furnace for powder metallurgy oil-impregnated bearings to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a continuous sintering furnace for powder metallurgy oil-impregnated bearings, comprising a furnace body, a bottom plate fixedly disposed at the bottom of the furnace body, a furnace cover disposed at the top of the bottom plate and at one end of the furnace body, a movable seat fixedly installed at the bottom of the furnace cover, a support seat disposed between the bottom plate and the furnace body, the furnace body being fixedly mounted on the top of the bottom plate via the support seat, and the furnace cover being structurally compatible with one end of the furnace body and mutually sealing.

[0007] To allow the bearing blank inside the mesh frame to oscillate and improve the sintering effect, preferably, one end of the furnace cover is provided with a holding structure, which includes two support beams, both of which are fixedly installed at one end of the furnace cover. A mesh frame is provided between the two support beams, and rectangular openings are provided through the surfaces of the two support beams. Guide rods are fixedly installed inside the two rectangular openings, and guide blocks are slidably installed on the outside of the guide rods. Two electric push rods are installed on the outer wall of the furnace cover. The mesh frame is open at the top. The two guide blocks are fixedly installed on both sides of the outer wall of the mesh frame, and the two electric push rods are fixedly installed on the outer wall of the furnace cover, with the output ends of the two electric push rods fixedly connected to one end of the mesh frame.

[0008] To facilitate the handling of bearing blanks, the mesh frame extends into or out of the furnace body. Preferably, two mounting slots are provided on the surface of the base plate at the bottom of the movable seat. A lead screw is rotatably mounted in one mounting slot, and a slide rod is fixedly mounted in the other mounting slot. A threaded block and a slider are respectively provided on the outside of the lead screw and the slide rod. A motor is provided at one end of the lead screw, which is fixedly mounted at one end of the base plate. The output end of the motor is fixedly connected to the lead screw in the corresponding mounting slot. The threaded block is located outside the lead screw and is threadedly connected to it. The slider is slidably connected to the slide rod. Both the threaded block and the slider are fixedly mounted on the bottom of the movable seat.

[0009] The technical effects and advantages of this utility model are as follows:

[0010] 1. By setting up a holding structure, the output ends of two electric push rods installed on the outer wall of the furnace cover reciprocate to push the mesh frame, so that the mesh frame slides continuously outside the guide rod through the guide block, causing the mesh frame to shake, which in turn drives the bearing blank inside the mesh frame to shake, so that the bearing blank can fully contact the heat in the furnace, improving the sintering uniformity and continuity.

[0011] 2. By driving the lead screw to rotate inside the corresponding mounting slot by the motor, the threaded block can drive the moving seat to move, and the moving seat can slide and guide outside the slide rod through the slider. The moving seat drives the furnace cover to move, which can drive the mesh frame to extend out of or into the furnace body. This facilitates the picking and placing of bearing blanks, avoiding the need to operate inside the furnace body during the picking and placing process, thus avoiding danger. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the structure of the wire mesh frame of this utility model when it extends from inside the furnace body.

[0014] Figure 3 This is a schematic diagram of the connection structure between the threaded block, slider, and movable seat of this utility model.

[0015] Figure 4 This is a three-dimensional schematic diagram of the holding structure of this utility model.

[0016] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0017] The attached diagram is labeled as follows: 1. Furnace body; 2. Bottom plate; 3. Furnace cover; 4. Movable seat; 5. Support beam; 6. Wire frame; 7. Rectangular opening; 8. Guide rod; 9. Guide block; 10. Electric push rod; 11. Support seat; 12. Mounting groove; 13. Lead screw; 14. Slide rod; 15. Threaded block; 16. Slider; 17. Motor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] As attached Figure 1-5 The continuous sintering furnace for powder metallurgy oil-impregnated bearings shown includes a furnace body 1, a bottom plate 2 fixedly installed at the bottom of the furnace body 1, a furnace cover 3 installed at the top of the bottom plate 2 and at one end of the furnace body 1, a movable seat 4 fixedly installed at the bottom of the furnace cover 3, a support seat 11 provided between the bottom plate 2 and the furnace body 1, the furnace body 1 being fixedly installed on the top of the bottom plate 2 via the support seat 11, and the furnace cover 3 being structurally compatible with one end of the furnace body 1 and mutually sealing.

[0020] Specifically, in this structure, the furnace body 1 is supported on the top of the base plate 2 by the support seat 11, and the furnace cover 3 is fixedly installed on the top of the movable seat 4. After the furnace cover 3 is closed, it can achieve a seal between the furnace cover 3 and the furnace body 1, reducing the heat loss inside the furnace body 1. After the furnace body 1 is connected to the power supply, the resistance wire inside the furnace body 1 can convert electrical energy into heat energy, thereby increasing the temperature inside the furnace chamber to which the furnace body 1 belongs, so that the powder metallurgy oil-impregnated bearing billet can be sintered at high temperature. The specific existing technology of the furnace body 1 will not be described in detail here.

[0021] In this embodiment, as shown in the appendix Figure 1 , 2As shown in Figures 4 and 5, a holding structure is provided at one end of the furnace cover 3. The holding structure includes two support beams 5, both of which are fixedly installed at one end of the furnace cover 3. A mesh frame 6 is provided between the two support beams 5, and a rectangular opening 7 is provided through the surface of each of the two support beams 5. A guide rod 8 is fixedly installed inside the two rectangular openings 7, and a guide block 9 is slidably installed on the outside of the guide rod 8. Two electric push rods 10 are installed on the outer wall of the furnace cover 3. The mesh frame 6 is open at the top. The two guide blocks 9 are fixedly installed on both sides of the outer wall of the mesh frame 6. The two electric push rods 10 are fixedly installed on the outer wall of the furnace cover 3, and the output ends of the two electric push rods 10 are fixedly connected to one end of the mesh frame 6.

[0022] Specifically, in this structure, in order to ensure that the oil-impregnated bearing blank is in full contact with the heat inside the furnace, the bearing blank can be placed inside the open mesh frame 6. When the mesh frame 6 containing the bearing blank is located inside the furnace to which the furnace body 1 belongs, the furnace cover 3 seals the inside of the furnace body 1.

[0023] At this time, the output ends of the two electric push rods 10 reciprocate to push the mesh frame 6, causing the mesh frame 6 to slide continuously outside the guide rod 8 through the guide block 9, causing the mesh frame 6 to shake, which in turn causes the bearing blank inside the mesh frame 6 to shake, so that the bearing blank can fully contact the heat in the furnace to achieve the purpose of continuous sintering and improve processing efficiency.

[0024] In this embodiment, as shown in the appendix Figure 1 , 2 As shown in Figure 3, two mounting slots 12 are formed on the surface of the base plate 2 and at the bottom of the movable seat 4. A lead screw 13 is rotatably mounted inside one mounting slot 12, and a slide rod 14 is fixedly mounted inside the other mounting slot 12. A threaded block 15 and a slider 16 are respectively provided on the outside of the lead screw 13 and the slide rod 14. A motor 17 is provided at one end of the lead screw 13. The motor 17 is fixedly mounted at one end of the base plate 2, and the output end of the motor 17 is fixedly connected to the lead screw 13 inside the corresponding mounting slot 12. The threaded block 15 is located outside the lead screw 13 and is threadedly connected to the lead screw 13. The slider 16 is slidably connected to the slide rod 14. Both the threaded block 15 and the slider 16 are fixedly mounted at the bottom of the movable seat 4.

[0025] Specifically, in this structure, the motor 17 drives the lead screw 13 to rotate inside the corresponding mounting slot 12, which enables the threaded block 15 to move the movable seat 4 away from the furnace body 1. The movable seat 4 is guided by the slider 16 to slide outside the slide rod 14. The movable seat 4 drives the furnace cover 3 to move away from the furnace body 1, thereby causing the mesh frame 6 to extend out from inside the furnace body 1. This facilitates the feeding and unloading of bearing blanks and avoids danger during the feeding and unloading process.

[0026] Working principle of this utility model:

[0027] This application provides a continuous sintering furnace for powder metallurgy oil-impregnated bearings. In actual use, in the initial state, the furnace cover 3 is located outside the furnace body 1, and the mesh frame 6 is in an open position outside the furnace body 1. This allows the operator to evenly place the powder metallurgy oil-impregnated bearing blanks into the open mesh frame 6 above. The stacking height of the blanks does not exceed 2 / 3 of the depth of the mesh frame 6, thus preventing overflow when shaking.

[0028] When the motor 17 is started, the motor 17 drives the lead screw 13 to rotate, the threaded block 15 moves along the lead screw 13, and at the same time the slider 16 slides and guides on the slide rod 14, so that the moving seat 4 drives the furnace cover 3 to move towards the furnace body 1, and drives the mesh frame 6 to move into the furnace chamber of the furnace body 1. After the furnace cover 3 is precisely aligned and fitted with one end of the furnace body 1, the furnace chamber of the furnace body 1 is sealed, ensuring that a closed space is formed inside the furnace chamber, reducing heat loss and atmosphere leakage.

[0029] At this time, after the furnace body 1 is powered on, the resistance wire inside the furnace body 1 converts electrical energy into heat energy, raising the temperature inside the furnace chamber to which the furnace body 1 belongs, so that the powder metallurgy oil-impregnated bearing blank is sintered at high temperature. At the same time, the output ends of the two electric push rods 10 reciprocate to push the mesh frame 6, so that the mesh frame 6 slides continuously outside the guide rod 8 through the guide block 9, causing the mesh frame 6 to shake, which in turn drives the bearing blank inside the mesh frame 6 to shake, so that the bearing blank is fully in contact with the heat in the furnace chamber, improving the sintering uniformity.

[0030] After sintering, the reverse rotation of the screw 13 causes the moving seat 4 to move the furnace cover 3 away from the furnace body 1, thereby causing the mesh frame 6 to extend out from the inside of the furnace body 1. This facilitates the removal of bearing blanks and avoids the need to operate inside the furnace body 1 during the removal and discharge process, which could cause danger.

[0031] It is worth noting that all contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are existing technologies and are therefore not shown in the figures, nor will they be described here.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuous sintering furnace for powder metallurgy oil-impregnated bearings, comprising a furnace body (1), characterized in that: A bottom plate (2) is fixedly installed at the bottom of the furnace body (1), and a furnace cover (3) is installed at the top of the bottom plate (2) and at one end of the furnace body (1). A movable seat (4) is fixedly installed at the bottom of the furnace cover (3), and a holding structure is provided at one end of the furnace cover (3). The holding structure includes two support beams (5), both support beams (5) are fixedly installed at one end of the furnace cover (3), a wire mesh frame (6) is provided between the two support beams (5), and rectangular openings (7) are opened through the surfaces of the two support beams (5). Guide rods (8) are fixedly installed inside the two rectangular openings (7), and guide blocks (9) are slidably installed on the outside of the guide rods (8). Two electric push rods (10) are installed on the outer wall of the furnace cover (3).

2. The continuous sintering furnace for powder metallurgy oil-impregnated bearings according to claim 1, characterized in that: A support base (11) is provided between the base plate (2) and the furnace body (1). The furnace body (1) is fixedly installed on the top of the base plate (2) through the support base (11). The furnace cover (3) is adapted to one end of the furnace body (1) and they are sealed to each other.

3. The continuous sintering furnace for powder metallurgy oil-impregnated bearings according to claim 1, characterized in that: Two mounting slots (12) are provided on the surface of the base plate (2) and at the bottom of the movable seat (4). A lead screw (13) is rotatably installed inside one mounting slot (12), and a slide rod (14) is fixedly installed inside the other mounting slot (12). A threaded block (15) and a slider (16) are respectively provided on the outside of the lead screw (13) and the slide rod (14). A motor (17) is provided at one end of the lead screw (13).

4. The continuous sintering furnace for powder metallurgy oil-impregnated bearings according to claim 3, characterized in that: The motor (17) is fixedly installed at one end of the base plate (2), and the output end of the motor (17) is fixedly connected to the lead screw (13) inside the corresponding mounting slot (12). The threaded block (15) is located outside the lead screw (13) and is threadedly connected to the lead screw (13). The slider (16) is slidably connected to the slide rod (14). The threaded block (15) and the slider (16) are both fixedly installed at the bottom of the movable seat (4).

5. The continuous sintering furnace for powder metallurgy oil-impregnated bearings according to claim 1, characterized in that: The mesh frame (6) is open at the top, and the two guide blocks (9) are fixedly installed on both sides of the outer wall of the mesh frame (6).

6. The continuous sintering furnace for powder metallurgy oil-impregnated bearings according to claim 1, characterized in that: Both electric push rods (10) are fixedly installed on the outer wall of the furnace cover (3), and the output ends of both electric push rods (10) are fixedly connected to one end of the mesh frame (6).

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