Vacuum furnace for heat treatment of metal workpiece

Abstract

The utility model relates to the technical field of vacuum furnaces, and discloses a vacuum furnace for heat treatment of metal workpieces, which comprises a bottom plate, two supporting seats are fixedly mounted at the top of the bottom plate, a furnace body is fixedly mounted at the tops of the two supporting seats, and a furnace cover is closed at an opening at the right end of the furnace body. The left side of the furnace cover is fixedly provided with a sealing plate, the diameter of the sealing plate is the same as that of an inner cavity of the furnace body, the lower position of the left side of the sealing plate is fixedly provided with an object placing plate extending into the furnace body, and the two ends of the left side of the object placing plate are respectively provided with a positioning groove. When a metal workpiece is placed on the holding plate, the holding plate is gradually moved out of the furnace body in the direction of the two positioning rods, then the metal workpiece can be directly placed on the holding plate, then the furnace cover is closed to enable the holding plate to move into the furnace body again, and finally a hydraulic rod is controlled to push a limiting block to move downwards and be clamped in a limiting groove in a connecting rod. And the furnace cover can be tightly closed at the opening end of the furnace body.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum furnaces, in particular to a vacuum furnace for heat treatment of metal workpieces. Background Art

[0002] A vacuum furnace is a furnace that uses a vacuum system (composed of a vacuum pump, a vacuum measuring device, a vacuum valve and other components that have been carefully assembled) to discharge some of the materials in the furnace cavity in a specific space, so that the pressure in the furnace cavity is less than a standard atmospheric pressure, and the space in the furnace cavity is thus in a vacuum state. This is a vacuum furnace. When a vacuum furnace is used to heat treat a metal workpiece, it is inconvenient to load the metal workpiece. The metal workpiece needs to be placed in the furnace body after the furnace cover is opened. In addition, since the placement plate is located inside the furnace body, there are certain limitations when loading the material due to space constraints. For this reason, the present application proposes a vacuum furnace for heat treatment of metal workpieces. Utility Model Content

[0003] In order to solve the problems raised in the above-mentioned background technology, the utility model provides the following technical solutions: a vacuum furnace for heat treatment of metal workpieces, comprising a base plate, two support seats are fixedly installed on the top of the base plate, a furnace body is fixedly installed on the top of the two support seats, a furnace cover is closed at the opening at the right end of the furnace body, a sealing plate with the same diameter as the furnace body inner cavity is fixedly installed on the left side of the furnace cover, a placement plate extending to the furnace body is fixedly installed at the lower position on the left side of the sealing plate, positioning grooves are provided at both ends of the left side of the placement plate, two positioning rods movably inserted in the two positioning grooves are fixedly installed on the left side of the furnace body inner cavity, two notches connected with the corresponding positioning grooves are provided at the bottom of the placement plate, the bottoms of the right ends of the two positioning rods are fixedly installed with support rods that penetrate the notches and are fixedly connected to the bottom of the inner wall of the furnace body, and a movable base that can move left and right and is fixedly connected to the bottom of the furnace cover is provided on the top of the base plate.

[0004] Furthermore, fixed blocks are fixedly installed on both sides of the right end of the furnace body, and through openings are opened on the sides of the two fixed blocks. L-shaped connecting rods are fixedly installed on both sides of the furnace cover, and the vertical parts of the two connecting rods are respectively inserted into the through openings on the sides of the two fixed blocks. Limiting grooves are opened on the tops of the vertical parts of the two connecting rods, and grooves are opened on the tops of the inner walls of the two through openings. Limiting blocks are movably installed in the two grooves, and hydraulic rods are fixedly installed on the tops of the two fixed blocks. The telescopic ends of the two hydraulic rods extend into the corresponding grooves and are fixedly connected to the tops of the limit blocks, and the bottom ends of the two limit blocks extend and engage in the limit grooves at the tops of the corresponding connecting rods.

[0005] Furthermore, the bottom of the limiting groove is set as an inclined surface, and the horizontal height of the inclined surface at the bottom of the limiting groove gradually decreases from left to right, and the bottom of the limiting block is set as an inclined surface that matches the bottom of the limiting groove.

[0006] Furthermore, the length of the limiting groove is greater than the length of the limiting block.

[0007] Furthermore, semicircular grooves are provided at the four corners of the bottom of the movable base, and a rotatable ball is arranged in each semicircular groove. Two slide grooves are provided on the top of the base plate, and the lower parts of the four balls extending out of the semicircular grooves are respectively located in the corresponding slide grooves on the top of the base plate.

[0008] Furthermore, when the furnace cover is closed at the opening at the right end of the furnace body, the right end of the storage plate fits with the right end of the inner cavity of the furnace body.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] When opening the furnace cover, the placement plate can be directly brought out of the furnace body, and the placement plate can be gradually moved out of the furnace body along the direction of the two positioning rods. Then the metal workpiece can be directly placed on the placement plate, and then the furnace cover can be closed to move the placement plate back into the furnace body. Finally, the hydraulic rod is controlled to push the limit block downward and engage it in the limit groove on the connecting rod, so that the furnace cover can be tightly closed at the opening end of the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a structural schematic diagram of a partial section of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure of the utility model from a top view;

[0015] Figure 4 It is a schematic diagram of the cross-sectional structure of the connection between the fixing block and the connecting rod of the utility model;

[0016] Figure 5 It is a side structural schematic diagram of the furnace body and the storage plate of the utility model;

[0017] Figure 6 It is a schematic cross-sectional structure diagram of the connection between the storage plate, the positioning rod and the support rod of the utility model;

[0018] Figure 7 This is a schematic diagram of the structure of the bottom of the mobile base of the utility model;

[0019] In the figure: 1. bottom plate; 2. support seat; 3. furnace body; 4. furnace cover; 5. sealing plate; 6. storage plate; 7. positioning groove; 8. positioning rod; 9. notch; 10. support rod; 11. movable base; 12. ball bearing; 13. slide groove; 14. fixing block; 15. connecting rod; 16. limit groove; 17. groove; 18. hydraulic rod; 19. limit block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Depend on Figure 1-7 The utility model includes a bottom plate 1, two support seats 2 are fixedly installed on the top of the bottom plate 1, a furnace body 3 is fixedly installed on the top of the two support seats 2, a furnace cover 4 is closed at the opening at the right end of the furnace body 3, a sealing plate 5 with the same diameter as the inner cavity of the furnace body 3 is fixedly installed on the left side of the furnace cover 4, a storage plate 6 extending to the inside of the furnace body 3 is fixedly installed at the lower position on the left side of the sealing plate 5, and a positioning groove 7 is opened at both ends of the left side of the storage plate 6, two positioning rods 8 movably inserted in the two positioning grooves 7 are fixedly installed on the left side of the inner cavity of the furnace body 3, and two corresponding positioning grooves 7 are opened at the bottom of the storage plate 6. The bottom of the right ends of the two positioning rods 8 are fixedly installed with a through-slot 9 and a support rod 10 fixedly connected to the bottom of the inner wall of the furnace body 3. The top of the bottom plate 1 is provided with a movable base 11 which can be moved left and right and is fixedly connected to the bottom of the furnace cover 4. When the furnace cover 4 is moved to the right, the placement plate 6 will be driven to move right along the direction of the positioning rod 8 in the furnace body 3. At this time, the support rod 10 at the bottom of the right end of the positioning rod 8 will move in the slot 9 at the bottom of the placement plate 6, so that the support rod 10 can always support the right end of the positioning rod 8, and under the action of the support rod 10, the placement plate 6 can be prevented from moving out of the furnace body 3.

[0022] At the same time, fixed blocks 14 are fixedly installed on both sides of the right end of the furnace body 3, and through openings are opened on the sides of the two fixed blocks 14. L-shaped connecting rods 15 are fixedly installed on both sides of the furnace cover 4. The vertical parts of the two connecting rods 15 are respectively inserted into the through openings on the sides of the two fixed blocks 14. Limiting grooves 16 are opened on the tops of the vertical parts of the two connecting rods 15. Grooves 17 are opened on the tops of the inner walls of the two through openings. Limiting blocks 19 are movably installed in the two grooves 17. Hydraulic rods 18 are fixedly installed on the tops of the two fixed blocks 14. The two hydraulic rods 1 The telescopic ends of 8 extend into the corresponding grooves 17 and are fixedly connected to the tops of the limit blocks 19, and the bottom ends of the two limit blocks 19 extend and engage in the limit grooves 16 at the tops of the corresponding connecting rods 15. When the furnace cover 4 is moved to close on the right end of the furnace body 3, the connecting rods 15 on both sides of the furnace cover 4 will be respectively inserted into the through openings on the sides of the fixed blocks 14 on both sides of the furnace body 3, and then the hydraulic rod 18 is controlled to push the limit blocks 19 to move downward in the grooves 17, so that the limit blocks 19 move down to the limit grooves 16 at the tops of the connecting rods 15 to complete the closure of the furnace cover 4 and the furnace body 3.

[0023] In addition, the bottom of the limit groove 16 is set as a slope, and the horizontal height of the slope at the bottom of the limit groove 16 gradually decreases from left to right, and the bottom of the limit block 19 is set as a slope that matches the bottom of the limit groove 16. By inserting the limit block 19 into the limit groove 16 and squeezing the slope at the bottom of the limit groove 16, the connecting rod 15 can be stably fixed in the through opening on the side of the fixing block 14.

[0024] In addition, the length of the limiting groove 16 is greater than the length of the limiting block 19. By allowing the inclined surface at the bottom of the limiting block 19 to squeeze the inclined surface of the limiting groove 16 at the top of the connecting rod 15, the connecting rod 15 gradually moves to the left in the opening, thereby driving the furnace cover 4 to tightly close at the opening at the right end of the furnace body 3, thereby greatly improving the sealing effect of the closure of the two.

[0025] In addition, semicircular grooves are provided at the four corners of the bottom of the movable base 11, and a rotatable ball 12 is arranged in each semicircular groove. Two slide grooves 13 are provided on the top of the bottom plate 1, and the lower parts of the four ball bearings 12 extending out of the semicircular grooves are respectively located in the corresponding slide grooves 13 on the top of the bottom plate 1. The slide grooves 13 can limit the moving range of the movable base 11 on the bottom plate 1, and the ball bearings 12 can reduce the friction between the bottom of the movable base 11 and the bottom plate 1, so that the movable base 11 is more labor-saving when moving.

[0026] In addition, when the furnace cover 4 is closed at the opening at the right end of the furnace body 3 , the right end of the storage plate 6 is in contact with the right end of the inner cavity of the furnace body 3 .

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum furnace for heat treatment of metal workpieces, comprising a bottom plate (1), characterized in that: Two support seats (2) are fixedly mounted on the top of the bottom plate (1), a furnace body (3) is fixedly mounted on the top of the two support seats (2), a furnace cover (4) is closed at the opening at the right end of the furnace body (3), a sealing plate (5) having the same diameter as the inner cavity of the furnace body (3) is fixedly mounted on the left side of the furnace cover (4), a storage plate (6) extending into the interior of the furnace body (3) is fixedly mounted at a lower position on the left side of the sealing plate (5), and positioning grooves (7) are provided at both ends of the left side of the storage plate (6). Two positioning rods (8) movably inserted into two positioning grooves (7) are fixedly installed on the left side of the inner cavity of the furnace body (3); two notches (9) connected to the corresponding positioning grooves (7) are provided at the bottom of the storage plate (6); the bottom of the right ends of the two positioning rods (8) are fixedly installed with a support rod (10) penetrating the notch (9) and fixedly connected to the bottom of the inner wall of the furnace body (3); and a movable base (11) that can move left and right and is fixedly connected to the bottom of the furnace cover (4) is provided on the top of the bottom plate (1).

2. A vacuum furnace for heat treatment of metal workpieces according to claim 1, characterized in that: Fixed blocks (14) are fixedly installed on both sides of the right end of the furnace body (3), and openings are opened on the sides of the two fixed blocks (14). L-shaped connecting rods (15) are fixedly installed on both sides of the furnace cover (4), and the vertical parts of the two connecting rods (15) are respectively inserted into the openings on the sides of the two fixed blocks (14). Limiting grooves (16) are opened on the tops of the vertical parts of the two connecting rods (15), and grooves (17) are opened on the tops of the inner walls of the two openings. Limiting blocks (19) are movably installed in the two grooves (17). Hydraulic rods (18) are fixedly installed on the tops of the two fixed blocks (14), and the telescopic ends of the two hydraulic rods (18) extend into the corresponding grooves (17) and are fixedly connected to the tops of the limiting blocks (19), and the bottom ends of the two limiting blocks (19) extend and are engaged in the limiting grooves (16) at the tops of the corresponding connecting rods (15).

3. A vacuum furnace for heat treatment of metal workpieces according to claim 2, characterized in that: The bottom of the limiting groove (16) is arranged as an inclined surface, and the horizontal height of the inclined surface at the bottom of the limiting groove (16) gradually decreases from left to right, and the bottom of the limiting block (19) is arranged as an inclined surface that matches the bottom of the limiting groove (16).

4. A vacuum furnace for heat treatment of metal workpieces according to claim 3, characterized in that: The length of the limiting groove (16) is greater than the length of the limiting block (19).

5. The vacuum furnace for heat treatment of metal workpieces according to claim 1, characterized in that: Semicircular grooves are provided at the four corners of the bottom of the movable base (11), and a rotatable ball (12) is arranged in each semicircular groove. Two slide grooves (13) are provided at the top of the bottom plate (1), and the lower halves of the four balls (12) extending out of the semicircular grooves are respectively located in the corresponding slide grooves (13) at the top of the bottom plate (1).

6. The vacuum furnace for heat treatment of metal workpieces according to claim 1, characterized in that: When the furnace cover (4) is closed at the opening at the right end of the furnace body (3), the right end of the storage plate (6) fits with the right end of the inner cavity of the furnace body (3).

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