Efficient heat treatment furnace

Abstract

The utility model discloses an efficient heat treatment furnace, which relates to the technical field of heat treatment equipment, and comprises a furnace body, a workpiece tray, a flexible unfolding pad and a turning piece, and the top of the furnace body is covered with a furnace cover. When the position of the through hole in the workpiece tray coincides with the position of the turning piece, the turning piece jacks up the flexible unfolding pad, so that the flexible unfolding pad deforms in an upward protruding mode, a workpiece placed on the workpiece tray is jacked up and turned over, the bottom face originally making contact with the workpiece tray is exposed, and after the through hole is separated from the turning piece, the flexible unfolding pad recovers, and the workpiece is turned over. And when the through hole coincides with the position of the turning piece again, the next turn-over action continues to be carried out, all the surfaces of the workpiece can be exposed through multiple times of turn-over, and therefore the complete and uniform heating effect is achieved, and the better heat treatment effect is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment equipment, in particular to a high-efficiency heat treatment furnace. Background Art

[0002] A heat treatment furnace is an electric furnace or fuel furnace used to heat the charge. Commonly used heat treatment furnaces include box-type resistance furnaces, pit-type resistance furnaces, gas carburizing furnaces, and salt bath furnaces.

[0003] For example, the patent document with the publication number "CN216585108U" discloses a high-efficiency mold heat treatment furnace, which solves the shortcomings that the mold cannot be heated evenly in the furnace and the inner wall of the heating furnace has no effective protection. The furnace comprises a support frame, a heating box is welded on the inner side of the top of the support frame, a heating wire is installed on the inner side of the heating box, a protective plate is fixed on the inner side of the heating box, a transmission shaft is movably connected to the bottom of the heating box, a placement plate is welded on the top of the transmission shaft, a first gear is sleeved on the bottom of the transmission shaft, a motor is installed on one side of the support frame, a second gear is sleeved on the output end of the motor, a retaining ring is fixed on the inner side of the bottom of the heating box, and a ball is clamped on the inner side of the top of the retaining ring. The mold heat treatment heating furnace can make the mold rotate slowly in the furnace to achieve the effect of uniform heating, and effectively support the mold, effectively preventing the mold from hitting the furnace wall when rotating in the furnace and causing damage to the internal heating wire.

[0004] In the prior art, although effective support is provided for the workpiece to be processed (such as the mold mentioned above) and the workpiece can be driven to rotate slowly to achieve uniform heating, the contact bottom surface between the workpiece and the placement plate is always blocked, making the uniform heating effect incomplete. Therefore, an efficient heat treatment furnace is needed. Utility Model Content

[0005] The purpose of this application is to provide a high-efficiency heat treatment furnace to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present application provides the following technical solutions: a high-efficiency heat treatment furnace, comprising a furnace body with a furnace cover on the top, a protective inner liner fixed to the inside of the furnace body, a heating wire embedded in the protective inner liner, a workpiece tray rotatably mounted on the bottom of the furnace body, and a drive motor for driving the workpiece tray to rotate mounted at the lower end of the furnace body;

[0007] A through hole is opened on the workpiece tray, and a flexible pad with good ductility is fixed in the through hole. A flip piece is installed at the lower end of the furnace body to lift the flexible pad so that the flexible pad bulges upward and deforms;

[0008] The turning piece is installed on a circumferential path along which the through hole rotates, and after the through hole and the turning piece are separated, the flexible pad is restored.

[0009] Preferably, the flip member comprises:

[0010] The fixed sleeve is fixedly installed at the lower end of the furnace body, and the upper end of the fixed sleeve is fixedly passed through the bottom wall of the furnace body, and the lower end of the fixed sleeve forms a closed end;

[0011] A movable support rod is slidably inserted into the fixed sleeve. When the movable support rod is located within the range of the through hole, the movable support rod extends upward and supports the flexible pad;

[0012] A compression spring, wherein the upper and lower ends of the compression spring are respectively fixed to the lower end of the movable support rod and the inner bottom wall of the fixed sleeve.

[0013] Preferably, the intersecting edges between the side walls on both sides of the through hole and the bottom surface of the workpiece tray are both arranged as guide arc surfaces, and the guide arc surfaces are in sliding contact with the upper end of the movable support rod.

[0014] Preferably, an abutment ball is rollingly embedded in the upper end of the movable support rod, and the abutment ball is in rolling contact with the bottom surface of the workpiece tray, the guide arc surface and the bottom surface of the flexible spreading pad.

[0015] Preferably, an annular circumferential side wall is formed at the upper end of the workpiece pallet, and a concave placement groove is formed in the middle of the annular circumferential side wall of the workpiece pallet.

[0016] Preferably, a support column is fixed at the lower end of the workpiece pallet, and the lower end of the support column rotates and passes through the bottom wall of the furnace body. The output shaft end of the drive motor is connected to the reduction gear box, and a transmission member is installed between the reduction gear box and the support column. The transmission member includes a first bevel gear fixedly mounted on the output end of the reduction gear box and a second bevel gear fixedly mounted on the lower end of the support column. The second bevel gear is meshed with the first bevel gear for transmission.

[0017] Preferably, a mounting ring is fixed to the bottom wall of the furnace body, and a supporting ball is rollingly embedded in the upper end of the mounting ring, and the upper end of the supporting ball is in rolling contact with the bottom surface of the workpiece tray.

[0018] In summary, the technical effects and advantages of the utility model are:

[0019] 1. In the utility model, through the arrangement of the through hole, the flexible spreading pad and the flipping member, when the driving motor drives the workpiece pallet to rotate, when the through hole on the workpiece pallet coincides with the position of the flipping member, the flipping member lifts up the flexible spreading pad, causing the flexible spreading pad to deform upwardly and convex, thereby lifting and flipping the workpiece placed on the workpiece pallet, so that the bottom surface originally in contact with the workpiece pallet is exposed; when the through hole is separated from the flipping member, the flexible spreading pad is restored, and when the through hole coincides with the position of the flipping member again, the next flipping action is continued; through multiple flippings, all surfaces of the workpiece can be exposed, thereby being subjected to a completely uniform heating effect, thereby obtaining a better heat treatment effect.

[0020] 2. In the utility model, by setting the fixed sleeve, the movable support rod and the compression spring, when the through hole and the flipping member are coincident in position, the movable support rod extends under the elastic force of the compression spring and lifts up the flexible pad, causing the flexible pad to deform upwardly and bulge, thereby lifting up one side of the workpiece placed on the workpiece pallet, causing the workpiece to turn over, and continuously turning the workpiece over during the rotation process, thereby achieving the effect of constantly changing the contact surface between the workpiece and the workpiece pallet, achieving a more uniform heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 Schematic diagram of the three-dimensional structure in this embodiment;

[0023] Figure 2 sectional view of the furnace body and protective liner in this embodiment;

[0024] Figure 3 This is a schematic diagram of the upward axis structure of the workpiece pallet in this embodiment;

[0025] Figure 4 It is a side sectional view of a part of the workpiece pallet and the flipping member in this embodiment.

[0026] In the figure: 1. furnace body; 11. furnace cover; 2. protective liner; 3. drive motor; 4. transmission part; 41. second bevel gear; 42. first bevel gear; 5. reduction gear box; 6. workpiece pallet; 61. support column; 62. through hole; 621. guide arc surface; 63. flexible pad; 64. placement groove; 7. flip part; 71. fixed sleeve; 72. movable support rod; 73. compression spring; 74. abutment ball; 8. mounting ring; 9. support ball. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: Reference Figure 1-4The high-efficiency heat treatment furnace shown includes a furnace body 1 with a furnace cover 11 on the top, a protective inner liner 2 fixed to the inside of the furnace body 1, and an electric heating wire embedded in the protective inner liner 2. A workpiece tray 6 is rotatably mounted on the bottom of the furnace body 1, and a drive motor 3 is installed at the lower end of the furnace body 1 to drive the workpiece tray 6 to rotate;

[0029] A through hole 62 is formed on the workpiece tray 6, and a flexible pad 63 with good ductility is fixed in the through hole 62. The flexible pad 63 is made of a stretchable sheet of a high-temperature resistant material commonly used in the prior art and suitable for this embodiment (which can withstand the high temperature environment generated during heat treatment without deformation and phase change). A flip member 7 is installed at the lower end of the furnace body 1 to lift the flexible pad 63 so that the flexible pad 63 bulges upward and deforms;

[0030] The flipping member 7 is installed on the circumferential path along which the through hole 62 rotates, and after the through hole 62 and the flipping member 7 are separated, the flexible pad 63 is restored.

[0031] Based on the above structure, when the driving motor 3 drives the workpiece pallet 6 to rotate, when the through hole 62 on the workpiece pallet 6 coincides with the position of the flipping member 7, the flipping member 7 lifts up the flexible pad 63, causing the flexible pad 63 to deform upwardly convexly, thereby lifting and flipping the workpiece placed on the workpiece pallet 6, so that the bottom surface originally in contact with the workpiece pallet 6 is exposed. When the through hole 62 is separated from the flipping member 7, the flexible pad 63 is restored, and when the through hole 62 coincides with the position of the flipping member 7 again, the next flipping action is continued. Through multiple flipping, all surfaces of the workpiece can be exposed, thereby being subjected to a completely uniform heating effect, thereby obtaining a better heat treatment effect.

[0032] Furthermore, the flip member 7 includes a fixed sleeve 71, a movable support rod 72 and a compression spring 73. The fixed sleeve 71 is fixedly installed at the lower end of the furnace body 1, and the upper end of the fixed sleeve 71 is fixedly passed through the bottom wall of the furnace body 1, and the lower end of the fixed sleeve 71 forms a closed end.

[0033] The movable support rod 72 is slidably inserted into the fixed sleeve 71. When the movable support rod 72 is located within the range of the through hole 62, the movable support rod 72 extends upward and supports the flexible pad 63.

[0034] The upper and lower ends of the compression spring 73 are fixed to the lower end of the movable support rod 72 and the inner bottom wall of the fixed sleeve 71 respectively.

[0035] By setting the fixed sleeve 71, the movable support rod 72 and the compression spring 73, when the through hole 62 coincides with the position of the flip part 7, the movable support rod 72 extends under the elastic force of the compression spring 73, and lifts up the flexible pad 63, causing the flexible pad 63 to deform upward, thereby lifting one side of the workpiece placed on the workpiece pallet 6, turning the workpiece over, and continuously turning the workpiece over during the rotation process, so that the contact surface between the workpiece and the workpiece pallet 6 is constantly changing, achieving a more uniform heating effect.

[0036] Furthermore, the intersecting edges between the side walls on both sides of the through hole 62 and the bottom surface of the workpiece pallet 6 are set as guiding arc surfaces 621, and the guiding arc surfaces 621 are in sliding contact with the upper end of the movable support rod 72, so as to guide the movable support rod 72 when entering and exiting the through hole 62, so that the movable support rod 72 can smoothly enter and exit (especially when going out) the through hole 62 to avoid jamming of the rod.

[0037] Furthermore, an abutment ball 74 is rollingly embedded in the upper end of the movable support rod 72, and the abutment ball 74 is in rolling contact with the bottom surface of the workpiece pallet 6, the guide arc surface 621 and the bottom surface of the flexible spread pad 63, thereby reducing the friction between the movable support rod 72 and other components, such as the workpiece pallet 6, the flexible spread pad 63, etc., thereby reducing wear, extending the service life of the equipment, and reducing subsequent maintenance costs.

[0038] Furthermore, an annular side wall is formed on the upper end of the workpiece pallet 6, and an inwardly concave placement groove 64 is formed in the middle of the annular side wall of the workpiece pallet 6, which can limit the workpiece to a certain extent and prevent the workpiece from falling out of the workpiece pallet 6 when it is turned over.

[0039] Furthermore, a support column 61 is fixed to the lower end of the workpiece pallet 6, and the lower end of the support column 61 rotates and passes through the bottom wall of the furnace body 1. The output shaft end of the drive motor 3 is connected to the reduction gear box 5. The reduction gear box 5 adopts a reduction gear box group commonly used in the prior art and suitable for this embodiment. A transmission member 4 is installed between the reduction gear box 5 and the support column 61. The transmission member 4 includes a first bevel gear 42 fixedly mounted on the output end of the reduction gear box 5 and a second bevel gear 41 fixedly mounted on the lower end of the support column 61. The second bevel gear 41 is engaged with the first bevel gear 42 for transmission. After the drive motor 3 is started, the rotation output by the output shaft of the drive motor 3 is decelerated by the reduction gear box 5 to form a slow rotation, thereby driving the support column 61 to rotate slowly through the first bevel gear 42 and the second bevel gear 41, thereby achieving the purpose of driving the workpiece pallet 6 and the workpiece placed thereon to rotate slowly.

[0040] Among them, a mounting ring 8 is also fixed to the bottom wall of the furnace body 1, and a supporting ball 9 is rollingly embedded in the upper end of the mounting ring 8. The upper end of the supporting ball 9 is in rolling contact with the bottom surface of the workpiece pallet 6, thereby providing stable and low-friction support for the workpiece pallet 6.

[0041] The working principle of the present invention is as follows: in daily use, after the drive motor 3 is started, the rotation output by the output shaft of the drive motor 3 is decelerated by the reduction gear 5 to form a slow rotation, thereby driving the support column 61 to rotate slowly through the first bevel gear 42 and the second bevel gear 41, thereby achieving the purpose of driving the workpiece pallet 6 and the workpiece placed thereon to rotate slowly. During the rotation of the workpiece pallet 6, when the through hole 62 on the workpiece pallet 6 coincides with the position of the flip member 7, the movable support rod 72 extends under the elastic force of the compression spring 73 and lifts the flexible pad 63, causing the flexible pad 63 to produce an upward convex deformation, thereby lifting and flipping the workpiece placed on the workpiece pallet 6, so that the bottom surface originally in contact with the workpiece pallet 6 is exposed. When the through hole 62 is separated from the flip member 7, the flexible pad 63 is restored. When the through hole 62 coincides with the flip member 7 again, the next flipping action is continued. Through multiple flipping, all surfaces of the workpiece can be exposed, thereby being subjected to a completely uniform heating effect, thereby obtaining a better heat treatment effect.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-efficiency heat treatment furnace, comprising a furnace body (1) with a furnace cover (11) on the top cover, a protective inner liner (2) fixed on the inner side of the furnace body (1), a heating wire embedded in the protective inner liner (2), a workpiece tray (6) rotatably mounted on the bottom of the furnace body (1), and a drive motor (3) for driving the workpiece tray (6) to rotate installed at the lower end of the furnace body (1), characterized in that: A through hole (62) is provided on the workpiece tray (6), a flexible pad (63) is fixed in the through hole (62), and a flipping member (7) is installed at the lower end of the furnace body (1) to lift the flexible pad (63) so that the flexible pad (63) is deformed and convex upward; The flipping member (7) is installed on the circumferential path along which the through hole (62) rotates, and after the through hole (62) and the flipping member (7) are separated, the flexible pad (63) is restored.

2. A high-efficiency heat treatment furnace according to claim 1, characterized in that: The flipping member (7) comprises: A fixed sleeve (71), wherein the fixed sleeve (71) is fixedly mounted on the lower end of the furnace body (1), and the upper end of the fixed sleeve (71) is fixedly passed through the bottom wall of the furnace body (1), and the lower end of the fixed sleeve (71) forms a closed opening; A movable support rod (72), wherein the movable support rod (72) is slidably inserted into the fixed sleeve (71), and when the movable support rod (72) is located within the range of the through hole (62), the movable support rod (72) extends upward and supports the flexible pad (63); A compression spring (73), wherein the upper and lower ends of the compression spring (73) are respectively fixed to the lower end of the movable support rod (72) and the inner bottom wall of the fixed sleeve (71).

3. A high-efficiency heat treatment furnace according to claim 2, characterized in that: The intersecting edges between the side walls on both sides of the through hole (62) and the bottom surface of the workpiece tray (6) are both set as guiding arc surfaces (621), and the guiding arc surfaces (621) are in sliding contact with the upper end of the movable support rod (72).

4. A high-efficiency heat treatment furnace according to claim 3, characterized in that: An abutting ball (74) is rollingly embedded in the upper end of the movable support rod (72), and the abutting ball (74) is in rolling contact with the bottom surface of the workpiece tray (6), the guide arc surface (621) and the bottom surface of the flexible spreading pad (63).

5. The high-efficiency heat treatment furnace according to claim 1, characterized in that: An annular circumferential side wall is formed at the upper end of the workpiece tray (6), and an inwardly concave placement groove (64) is formed in the middle of the annular circumferential side wall of the workpiece tray (6).

6. The high-efficiency heat treatment furnace according to claim 1, characterized in that: A support column (61) is fixed to the lower end of the workpiece pallet (6), and the lower end of the support column (61) rotates and penetrates the bottom wall of the furnace body (1). The output shaft end of the drive motor (3) is connected to the reduction box (5) in a transmission manner. A transmission member (4) is installed between the reduction box (5) and the support column (61). The transmission member (4) includes a first bevel gear (42) fixedly sleeved on the output end of the reduction box (5) and a second bevel gear (41) fixedly sleeved on the lower end of the support column (61). The second bevel gear (41) is meshed with the first bevel gear (42) for transmission.

7. The high-efficiency heat treatment furnace according to claim 1, characterized in that: A mounting ring (8) is fixed to the inner bottom wall of the furnace body (1), and a supporting ball (9) is rollingly embedded in the upper end of the mounting ring (8), and the upper end of the supporting ball (9) is in rolling contact with the bottom surface of the workpiece tray (6).

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