Roller hearth furnace for heat treatment of aluminum alloy wheels

Abstract

The present invention relates to the technical field of roller hearth furnaces, specifically to a roller hearth furnace for heat treatment of aluminum alloy wheel hubs, comprising a bottom rod and a furnace wall, wherein both ends of the bottom rod are provided with extension rods for length adjustment, the inner surface of the bottom rod is provided with an inner support member for internal support, one end of the extension rod is provided with an inner support member for connecting with the furnace wall, the inner surface of the inner support member is provided with a locking member for locking the extension rod and the inner support member, the inner surface of the furnace wall is provided with an insulating wall for heat insulation and heat preservation, the extension rod can change its own length to adapt to the requirements of roller hearth furnaces of different widths, and after the length is stretched, the bearing capacity and stability are still guaranteed, and the inner support member can be supported in holes of different sizes by expansion, thereby ensuring the concentricity and sealing of the bottom rod and the roller connected to the insulating wall, and the insulating wall realizes good heat insulation and heat preservation effect in the furnace, and the ceramic fiber prefabricated block of the insulating wall is combined with the ceramic fiber module to balance the temperature in the furnace and reduce energy consumption.

Description

Technical Field

[0001] The invention relates to the technical field of roller hearth furnaces, in particular to a roller hearth furnace for heat treatment of aluminum alloy wheels. Background Art

[0002] A roller-hearth furnace for wheel hub heat treatment is an industrial furnace used for wheel hub heat treatment. Its operating principle is to use a roller-hearth conveyor system to sequentially process the wheel hub through heating, insulation, and cooling processes within the furnace to improve material properties. During the heating phase, the furnace's heating device raises the temperature to a set value. For example, the solution treatment temperature for aluminum alloy wheels is typically between 535°C and 550°C. After a period of insulation, quenching or aging treatment is performed. Its features include uniform wheel heating, ensuring consistent heat treatment quality; a high degree of automation, enabling continuous production and improving production efficiency; and the ability to configure a protective atmosphere to reduce oxidation and decarburization. Widely used in automotive wheel production, it plays a significant role in improving mechanical properties such as wheel hub strength, hardness, and wear resistance.

[0003] During the heat treatment of aluminum alloy wheels, a roller hearth furnace is required.

[0004] The existing roller hearth furnace has the defect of poor sealing between the roller and the refractory material due to the different sizes of different furnace walls. Due to the small spacing between the roller holes in the roller hearth furnace, there are problems such as non-concentricity of the field-made hole roll necks and heat loss. Summary of the Invention

[0005] The present invention aims to provide a roller-hearth furnace for heat treatment of aluminum alloy wheels, so as to solve the problems of sealing and heat loss in the existing roller-hearth furnaces for heat treatment proposed in the above-mentioned background art. To achieve the above-mentioned purpose, the present invention provides the following technical solution: a roller-hearth furnace for heat treatment of aluminum alloy wheels, comprising a bottom roller and a furnace wall, wherein the bottom roller is detachably connected to the inner surface of the furnace wall, an extension rod for adjusting the length is provided at both ends of the bottom roller, an inner support member for internal support is provided on the inner surface of the bottom roller, an inner support member for connecting to the furnace wall is provided at one end of the extension rod, a locking member is provided on the inner surface of the inner support member for locking the variation of the extension rod and the inner support member, and an insulating wall is provided on the inner surface of the furnace wall for heat insulation.

[0006] Preferably, the bottom roller is hollow inside.

[0007] Preferably, the extension rod includes a connecting slot, the connecting slot is provided on the outer surface of the bottom rod, the inner surface of the bottom rod is slidably connected to the connecting rod, the outer surface of the connecting rod is fixedly connected to the connecting pin, the outer surface of the connecting rod is provided with a control groove, one end of the connecting rod is provided with a limiting slot, and the other end of the connecting rod is rotatably connected to a sealing baffle;

[0008] The connecting pin is slidably connected to the connecting slot, the connecting rod penetrates the inner surface of the bottom stick, the control groove is 90 degrees, and the limit slot is 90 degrees and symmetrically distributed on both sides of the connecting rod.

[0009] Preferably, the inner support member includes a supporting slider, which is equidistantly distributed on the inner surface of the bottom rod, and a supporting slider at one end is fixedly connected to the inner surface of the bottom rod, the outer surface of the supporting slider is hingedly connected to four outer hinged rods distributed in a ring, one end of the outer hinged rod is hingedly connected to a movable connecting groove, the outer surface of the movable connecting groove is slidably connected to an inner connecting block, the inner surface of the bottom rod is slidably connected to a docking joint, and the docking joint and the inner connecting block are hingedly connected by an outer hinged rod, the outer surface of the docking joint is provided with a docking locking groove, and the inner surface of the bottom rod is provided with a support limit groove.

[0010] Preferably, the inner connecting blocks are distributed at equal intervals, and each inner connecting block is located between two supporting sliders. The number of the movable connecting grooves on each inner connecting block is four and they are distributed in a ring shape. The supporting sliders and the docking joints are both slidably connected to the inner surfaces of the supporting limit grooves, and the docking joints are fixedly connected to the connecting rod.

[0011] Preferably, the inner support member includes a fixed base, which is fixedly connected to the outer surface of the sealing baffle, and the inner surface of the fixed base is provided with four annularly distributed direct-acting grooves, one end of the fixed base is rotatably connected to a driven turntable, and the outer surface of the driven turntable is provided with four annularly distributed toggle grooves, and a rotating slot is provided at the center of the driven turntable, and the outer surface of the fixed base is slidably connected to four annularly distributed outer support rings, one side surface of the outer support ring is fixedly connected to a driven rod, and the outer surface of the outer support ring is slidably connected to an intermediate support ring, both sides of the intermediate support ring are hinged with intermediate hinge rods, and the outer surface of the intermediate support ring is fixedly connected to an outer covering plate.

[0012] Preferably, the driven rod is slidably connected to the inner surface of the direct-acting groove, the top surface of the driven rod is slidably connected to the inner surfaces of the direct-acting groove and the toggle groove, the support rings are symmetrically distributed at both ends of the fixed base, and the number of support rings at each end is four, and they are distributed in a ring shape on the outer surface of the fixed base, and the four support rings are all between two outer support rings, the other end of the intermediate hinge rod is hingedly connected to the outer surface of the outer support ring, the number of the outer covering plates is four, and the outer covering plates are slidably connected to the outer surface of the fixed base.

[0013] Preferably, the locking member includes a locking rod, which passes through the connecting rod, the fixed base, and the driven turntable. A rotating plug is provided on the outer surface of the locking rod, a stop groove is provided on the outer surface of the locking rod, the outer surface of the locking rod is fixedly connected to an outer control ring, the outer surface of the locking rod is fixedly connected to a connecting ring, locking supports are hinged on both sides of the connecting ring, and one end of the locking rod is fixedly connected to a locking plug.

[0014] Preferably, the rotating plug is engaged with the rotating slot, the stop groove is slidingly connected to the rotating slot, the outer control ring is slidingly connected to the inner surface of the control slot, the locking support block is slidingly connected to the inner surface of the limit slot, the locking support block contacts the inner surface of the bottom rod, and the locking plug matches the size of the docking locking slot.

[0015] Preferably, the thermal insulation wall includes a ceramic fiber prefabricated block, a roller connection hole is opened on the outer surface of the ceramic fiber prefabricated block, a mounting clip is fixedly connected to the outer surface of the ceramic fiber prefabricated block, a module housing is fixedly connected to the bottom surface of the ceramic fiber prefabricated block, a ceramic fiber module is fixedly connected to the inner surface of the module housing, and a ceramic fiber blanket is fixedly connected to the outer surface of the ceramic fiber module;

[0016] The roller connection hole contacts the outer surfaces of both the outer support ring and the intermediate support ring. The ceramic fiber prefabricated block is made of a light hard material. The ceramic fiber modules are arranged in a longitudinal direction.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, through the cooperation of the bottom roller, the extension rod and the inner support, the extension rod is extended and retracted inside the bottom roller, so that the length of the bottom roller can be flexibly adjusted and the internal support is stable. The inner support ensures that the bottom roller always has sufficient supporting force to prevent the bottom roller from being crushed, thereby ensuring its load-bearing capacity and stability, and adapting to the needs of roller-hearth furnaces of different widths.

[0019] In the present invention, through the cooperation of the extension rod, the internal support member and the locking member, the effects of effective support, sealing and length locking of the connection between the bottom rod and the furnace wall are achieved. By expanding the internal support member, it can be supported in holes of different sizes, thereby ensuring the concentricity and sealing of the connecting roller between the bottom rod and the insulation wall; the locking member can drive the driven turntable to rotate to realize the expansion or locking of the internal support member, and at the same time, the locking support block and the locking insert block respectively cooperate with the limit slot and the docking locking slot to lock the length of the bottom rod and the extension rod, thereby ensuring that the connection between the bottom rod and the extension rod is stable and reliable, and normal use will not be affected by length changes during the heat treatment process.

[0020] In the present invention, a good thermal insulation effect is achieved in the furnace through the thermal insulation wall. The ceramic fiber prefabricated block of the thermal insulation wall is combined with the ceramic fiber module. The ceramic fiber prefabricated block is a light hard material, and the ceramic fiber module is arranged longitudinally. The two are matched with the thermal insulation sealed open-pore ceramic fiber blanket as the backing to achieve a secondary thermal insulation effect, so that the temperature in the furnace is balanced and energy consumption is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side view schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the installation structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the extension rod components cooperating with each other in the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the bottom roller, the connecting rod and the inner support member cooperating with each other in the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the inner support member of the present invention cooperating with each other;

[0026] Figure 6 This is a schematic diagram of the structure of the bottom roller and the support limiting groove cooperating with each other in the present invention;

[0027] Figure 7 Schematic diagram A of the structure of the support slider, the outer hinge rod, the movable connection groove, and the inner connection block cooperating with each other in the present invention;

[0028] Figure 8 Schematic diagram B of the structure of the support slider, the outer hinge rod, the movable connection groove, and the inner connection block cooperating with each other in the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the inner support member and the locking member cooperating with each other in the present invention;

[0030] Figure 10 Schematic diagram A of the structure of the inner support member of the present invention cooperating with each other;

[0031] Figure 11 This is a schematic diagram of the structure of the fixed base and the outer support ring cooperating with each other in the present invention;

[0032] Figure 12 Schematic diagram B of the structure of the inner support member of the present invention cooperating with each other;

[0033] Figure 13 A schematic diagram of the structure of the rotating slot and the locking rod cooperating with each other in the present invention;

[0034] Figure 14This is a schematic diagram of the structure of the locking rod, the driven rotating disk and the fixed base cooperating with each other in the present invention;

[0035] Figure 15 This is a schematic diagram of the structure of the various components of the locking device of the present invention cooperating with each other;

[0036] Figure 16 This is a schematic diagram of the structure of the locking member, the extension rod and the bottom stick cooperating with each other in the present invention;

[0037] Figure 17 This is a schematic diagram of the structure of the connecting rod, the control slot, and the limit slot cooperating with each other in the present invention;

[0038] Figure 18 This is a schematic diagram of the structure of the control groove and the outer control ring cooperating with each other in the present invention;

[0039] Figure 19 This is a schematic diagram of the structure of the heat insulation wall and the inner support member cooperating with each other in the present invention;

[0040] Figure 20 This is a schematic diagram of the structure of the various components of the heat insulation wall of the present invention cooperating with each other;

[0041] Figure 21 This is a schematic diagram of the structure of the ceramic fiber prefabricated block and the ceramic fiber module cooperating with each other in the present invention;

[0042] Figure 22 This is a schematic diagram of the structure of the furnace wall, ceramic fiber prefabricated block, and ceramic fiber module cooperating with each other in the present invention;

[0043] Figure 23 This is a schematic diagram of the structure of the furnace wall, ceramic fiber prefabricated block, and bottom roller cooperating with each other in the present invention;

[0044] Figure 24 This is a schematic diagram of the structure of the furnace wall, ceramic fiber prefabricated block and module shell cooperating with each other in the present invention.

[0045] In the figure: 1. Bottom rod; 11. Furnace wall; 2. Extension rod; 21. Connecting slot; 22. Connecting rod; 221. Connecting pin; 222. Control slot; 223. Limiting slot; 23. Sealing baffle; 3. Inner support member; 31. Support slider; 32. External hinged rod; 33. Active connecting slot; 34. Inner connecting block; 35. Docking joint; 351. Docking locking slot; 36. Support limiting slot; 4. Inner support member; 41. Fixed base; 411. Direct-acting slot; 42. Driven turntable; 421. Toggle slot; 422. Rotation slot; 43. Outer support ring; 431. Follower rod; 44. Intermediate support ring; 441. Intermediate hinge rod; 45. Outer cover plate; 5. Locking piece; 51. Locking rod; 52. Rotation plug; 521. Stop groove; 53. Outer control ring; 54. Connecting ring; 541. Locking support block; 55. Locking plug; 6. Insulation wall; 61. Ceramic fiber prefabricated block; 611. Roller connection hole; 612. Mounting buckle; 62. Module housing; 63. Ceramic fiber module; 631. Ceramic fiber blanket. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] See also Figures 1 to 24 The present invention provides a technical solution: a roller hearth furnace for heat treatment of aluminum alloy wheel hubs, comprising a bottom rod 1 and a furnace wall 11, wherein the bottom rod 1 is detachably connected to the inner surface of the furnace wall 11, and extension rods 2 for length adjustment are provided at both ends of the bottom rod 1, and an inner support member 3 for internal support is provided on the inner surface of the bottom rod 1, and an inner support member 4 for connecting to the furnace wall 11 is provided at one end of the extension rod 2, and a locking member 5 for locking the change amount of the extension rod 2 and the inner support member 4 is provided on the inner surface of the inner support member 4, and an insulating wall 6 for heat insulation and heat preservation is provided on the inner surface of the furnace wall 11.

[0048] The bottom stick 1 is hollow inside.

[0049] The extension rod 2 includes a connecting slot 21, which is provided on the outer surface of the bottom stick 1. A connecting rod 22 is slidably connected to the inner surface of the bottom stick 1. A connecting pin 221 is fixedly connected to the outer surface of the connecting rod 22. A control groove 222 is provided on the outer surface of the connecting rod 22. A limit slot 223 is provided at one end of the connecting rod 22. A sealing baffle 23 is rotatably connected to the other end of the connecting rod 22.

[0050] The connecting pin 221 is slidably connected to the connecting slot 21, and the connecting rod 22 penetrates the inner surface of the bottom stick 1. The control slot 222 is 90 degrees, and the limit slot 223 is 90 degrees and symmetrically distributed on both sides of the connecting rod 22;

[0051] Through the setting of the extension rod 2, during use, the connecting rod 22 is inserted into the interior of the bottom rod 1, and the overall length of the bottom rod 1 and the connecting rod 22 can be adjusted by sliding. The bottom rod 1 and the connecting rod 22 are alternately inserted through the connecting slot 21 and the connecting pin 221, which plays a spline effect to make the bottom rod 1 and the connecting rod 22 rotate synchronously, and the intersecting parts are complementary, so that it remains a complete cylinder, thereby ensuring the surface flatness so that the hub will not have large bumps when transmitting on the surface. The control groove 222 and the limit slot 223 are used to provide internal activity space and limitation for the locking member 5. The sealing baffle 23 is large enough to cover the connection between the extension rod 2 and the insulation wall 6, reducing heat loss, so that the heat treatment roller is suitable for roller bottom furnaces of different widths.

[0052] The inner support member 3 includes a supporting slider 31, which is equidistantly distributed on the inner surface of the bottom rod 1, and a supporting slider 31 at one end is fixedly connected to the inner surface of the bottom rod 1, and the outer surface of the supporting slider 31 is hingedly connected to four annularly distributed external hinged rods 32, one end of the external hinged rod 32 is hingedly connected to a movable connecting groove 33, and the outer surface of the movable connecting groove 33 is slidingly connected to an inner connecting block 34, and the inner surface of the bottom rod 1 is slidingly connected to a docking joint 35, and the docking joint 35 is hinged to the inner connecting block 34 through the outer hinged rod 32, the outer surface of the docking joint 35 is provided with a docking locking groove 351, and the inner surface of the bottom rod 1 is provided with a support limit groove 36.

[0053] The inner connecting blocks 34 are equidistantly distributed, and each inner connecting block 34 is located between two supporting sliders 31. There are four movable connecting grooves 33 on each inner connecting block 34, and they are distributed in an annular manner. The supporting sliders 31 and the docking joints 35 are both slidably connected to the inner surface of the support limiting grooves 36, and the docking joints 35 are fixedly connected to the connecting rod 22.

[0054] Through the arrangement of the inner support member 3, the support slider 31 and the inner connecting block 34 are alternately distributed during use, and are connected in the middle by the outer hinge rod 32. The support slider 31 provides support. When the outer hinge rod 32 is rotated away from the outer hinge rod 32, the outer hinge rod 32 will move away from the outer hinge rod 32 to adapt to the new distance between the support slider 31 and the inner connecting block 34. After the rotation of the outer hinge rod 32, the movable connecting groove 33 will be pulled out from the inner connecting block 34 to adapt to the new position. In this way, after the connecting rod 22 is pulled out from the bottom roller 1, the place originally supported by the connecting rod 22 will be vacant, and the vacant part will be supported by the dispersed supporting slider 31 again, so that the bottom roller 1 always has sufficient support. When the wheel hub is transported out, the surface of the bottom roller 1 has better bearing capacity and is less likely to be depressed. The supporting slider 31 can only slide in the support limit groove 36 and cannot rotate.

[0055] The inner support member 4 includes a fixed base 41, which is fixedly connected to the outer surface of the sealing baffle 23. The inner surface of the fixed base 41 is provided with four annularly distributed direct-acting grooves 411. One end of the fixed base 41 is rotatably connected to a driven turntable 42. The outer surface of the driven turntable 42 is provided with four annularly distributed toggle grooves 421. A rotating slot 422 is provided at the center of the driven turntable 42. The outer surface of the fixed base 41 is slidably connected to four annularly distributed outer support rings 43. One side surface of the outer support ring 43 is fixedly connected to a driven rod 431. The outer surface of the outer support ring 43 is slidably connected to an intermediate support ring 44. Both sides of the intermediate support ring 44 are hinged with intermediate hinge rods 441. The outer surface of the intermediate support ring 44 is fixedly connected to an outer covering plate 45.

[0056] The driven rod 431 is slidably connected to the inner surface of the direct-acting groove 411, and the top surface of the driven rod 431 is slidably connected to the inner surfaces of the direct-acting groove 411 and the toggle groove 421. The spacer rings 44 are symmetrically distributed at both ends of the fixed base 41, and there are four spacer rings 44 at each end. They are annularly distributed on the outer surface of the fixed base 41, and the four spacer rings 44 are all located between the two outer support rings 43. The other end of the intermediate hinge rod 441 is hingedly connected to the outer surface of the outer support ring 43. There are four outer cover plates 45, and the outer cover plates 45 are slidably connected to the outer surface of the fixed base 41.

[0057] By setting the inner support member 4, during use, the driven rod 431 can move linearly in the direct-acting groove 411, and the driven rod 431 is at the overlap of the direct-acting groove 411 and the toggle groove 421. When the driven turntable 42 rotates, the overlapping area of ​​the toggle groove 421 and the direct-acting groove 411 will change. When it rotates clockwise, the overlapping area will move outward, so that the driven rod 431 pushes the outer support ring 43 to move outward. After moving outward, the distance between them will increase at the same time. The intermediate support ring 44 is between the outer support rings 43. In the initial state, the intermediate hinged rods 441 are all facing inward, and the angle between them is small. At this time, the distance between them and the intermediate support ring 44 is small. When the distance between the outer support rings 43 increases, the angle between the intermediate hinged rods 441 on both sides gradually increases. The spacing also increases, which will pull the spacer ring 44 up and move outward to fill the gap between the outer support rings 43. In the process of moving outward, the spacer ring 44 will also pull the outer cover plate 45 to move, covering part of the gap between the outer support ring 43 and the fixed base 41. In this way, the outer support ring 43 and the spacer ring 44 can expand on the fixed base 41 to increase the overall size, so that they can be supported in holes of different sizes, and the fixed base 41 is always in the center position, so that the hole of the connecting roller of the bottom rod 1 and the insulation wall 6 is concentric and the sealing of the bottom rod 1 and the insulation wall 6 is strengthened. The toggle grooves 421 on both sides are opposite in direction. Therefore, during installation, the toggle grooves 421 on both sides need to be rotated in opposite directions, so that the rotation direction of the force couple applied to the middle bottom rod 1 is opposite, preventing the bottom rod 1 from rotating during installation.

[0058] The locking member 5 includes a locking rod 51, which passes through the connecting rod 22, the fixed base 41, and the driven turntable 42. A rotating plug 52 is provided on the outer surface of the locking rod 51, and a stop groove 521 is provided on the outer surface of the locking rod 51. The outer surface of the locking rod 51 is fixedly connected to an outer control ring 53, and the outer surface of the locking rod 51 is fixedly connected to a connecting ring 54. The two sides of the connecting ring 54 are hingedly connected to locking supports 541, and one end of the locking rod 51 is fixedly connected to a locking plug 55.

[0059] The rotating insert 52 is engaged with the rotating slot 422, the stop groove 521 is slidably connected to the rotating slot 422, the outer control ring 53 is slidably connected to the inner surface of the control slot 222, the locking support block 541 is slidably connected to the inner surface of the limit slot 223, the locking support block 541 contacts the inner surface of the bottom rod 1, and the locking insert 55 matches the size of the docking locking groove 351;

[0060] Through the setting of the locking piece 5, during use, the locking rod 51 can slide and rotate in the connecting rod 22, the fixed base 41, and the driven turntable 42, all of which are controlled by the external outer control ring 53. The outer control ring 53 can slide and rotate in the control groove 222, but the maximum rotation angle is limited to ninety degrees. At the same time, the range of movement is also limited in the control groove 222. The locking rod 51 is connected to the rotating slot 422 on the driven turntable 42 through the rotating plug block 52 and the stop groove 521. In the initial state, the locking rod 51 is close to the outside. At this time, the rotating plug block 52 is connected to the rotating slot 422. At this time, when the outer control ring 53 drives the locking rod 51 to rotate, the driven turntable 42 will also rotate, thereby driving the inner support member 4 to expand. After the expansion is completed, the outer control ring 53 drives the locking rod 51 to move inward. At this time, only the stop groove 521 is connected to the rotating slot 422, and the stop groove 521 is connected to the rotating slot 422. The groove 521 is small in size and cannot drive the rotating slot 422 to rotate, so that the expanded inner support member 4 is locked and cannot be expanded or reduced. After the locking rod 51 moves inward, the locking plug 55 will be inserted into the docking locking groove 351 of the docking head 35 to form a docking. Due to the movement of the connecting ring 54, the locking support block 541 is restricted in the limiting slot 223 and cannot move inward together. It can only be pushed outward by the hinged rod on the connecting ring 54, thereby pressing against the inside of the bottom rod 1, and using the friction between the bottom rod 1 and the connecting rod 22 to lock the current length. After being pushed out, the hinged rod on the connecting ring 54 is perpendicular to the axis of the locking rod 51, and the extrusion force of the bottom rod 1 exceeds the rotation center, and the connecting ring 54 cannot move to maintain the supporting state of the locking support block 541. After the locking rod 51 moves inward, the length of the extension rod 2 and the supporting size of the inner support member 3 are locked at the same time.

[0061] The thermal insulation wall 6 includes a ceramic fiber prefabricated block 61. A roller connection hole 611 is formed on the outer surface of the ceramic fiber prefabricated block 61. A mounting clip 612 is fixedly connected to the outer surface of the ceramic fiber prefabricated block 61. A module housing 62 is fixedly connected to the bottom surface of the ceramic fiber prefabricated block 61. A ceramic fiber module 63 is fixedly connected to the inner surface of the module housing 62. A ceramic fiber blanket 631 is fixedly connected to the outer surface of the ceramic fiber module 63.

[0062] The roller connection hole 611 contacts the outer surface of both the outer support ring 43 and the intermediate support ring 44. The ceramic fiber prefabricated block 61 is made of a light and hard material. The ceramic fiber modules 63 are arranged longitudinally.

[0063] Through the setting of the insulation wall 6, during use, the insulation wall 6 adopts a combination of a ceramic fiber module 63 and a ceramic fiber prefabricated block 61. The ceramic fiber prefabricated part is a lightweight hard material, and the backing is an insulating and sealed open-pore ceramic fiber blanket 631. The combination of hard and soft achieves a secondary insulation effect, and the temperature in the furnace is balanced to reduce energy consumption. The module shell 62 only plays the role of external protection. The ceramic fiber module 63 is arranged horizontally and vertically to provide tension release space during thermal expansion and contraction, and can withstand high temperatures. The ceramic fiber prefabricated block 61 and the ceramic fiber module 63 are fixed to the furnace wall 11 through the installation buckle 612, and are connected to the inner support 3 on the extension rod 2 through the roller connection hole 611.

[0064] In this embodiment, Figure 1 、 Figure 2 As shown, the bottom roller 1 is connected to the inner surface of the furnace wall 11 through the extension rod 2. The extension rod 2 is adjusted in length, and the inner support member 4 ensures the centrifugal degree after installation. After installation, the bottom roller 1 and the extension rod 2 are heat-treated by rotating the conveying hub;

[0065] In this embodiment, Figure 3 、 Figure 4 As shown, the connecting rod 22 is inserted into the interior of the bottom stick 1, and the overall length of the bottom stick 1 and the connecting rod 22 can be adjusted by sliding;

[0066] In this embodiment, Figure 4 、 Figure 5 、 Figure 6 As shown, after the connecting rod 22 is pulled out from the bottom roller 1, the area originally supported by the connecting rod 22 will be vacant, and the vacant area will be supported by the dispersed support slider 31 again;

[0067] In this embodiment, Figure 7 、 Figure 8 As shown, when the inner support member 3 is in the compression and tension states, the rotation angle of the outer hinge rod 32 is different, and the position of the movable connection slot 33 on the inner connection block 34 is different;

[0068] In this embodiment, Figure 9 、 Figure 10 As shown, the locking member 5 controls the rotation of the inner support member 4;

[0069] In this embodiment, Figure 11 、 Figure 12 As shown, the outer support ring 43 controls the opening and closing of the entire inner support member 4 by rotating the driven turntable 42;

[0070] In this embodiment, Figure 13 、 Figure 14 As shown, the locking rod 51 realizes controlled rotation by connecting to the fixed base 41 and the driven rotary disk 42 at different positions;

[0071] In this embodiment, Figure 15 、 Figure 16 As shown, the locking support block 541 is pushed outward by the hinged rod on the connecting ring 54, thereby pressing against the inside of the bottom rod 1, and clamping the bottom rod 1 and the connecting rod 22 by friction therebetween;

[0072] In this embodiment, Figure 17 、 Figure 18 As shown, the outer control ring 53 can slide and rotate in the control groove 222, but the maximum rotation angle is limited to 90 degrees. At the same time, the range of movement is also limited in the control groove 222, driving the locking rod 51 to rotate and move;

[0073] In this embodiment, Figure 19 、 Figure 20 、 Figure 21 、 Figure 22 、 Figure 23 、 Figure 24 As shown, the combination of hard and soft materials achieves a secondary thermal insulation effect, which balances the temperature inside the furnace and reduces energy consumption.

[0074] The use method and advantages of the present invention: The roller hearth furnace for heat treatment of aluminum alloy wheel hubs works as follows:

[0075] like Figures 1 to 24 As shown, when in use, the ceramic fiber prefabricated block 61 and the ceramic fiber module 63 are fixed to the furnace wall 11 by installing the buckle 612, and connected to the inner support member 3 on the extension rod 2 through the roller connection hole 611. In the initial state, the locking rod 51 is outside, and the connecting rod 22 is pulled out from the bottom roller 1 to adapt to the size of the furnace wall 11. The gap after pulling is supported by the support slider 31. At this time, the locking rods 51 on both sides are rotated by the outer control ring 53 to drive the driven turntable 42 to rotate, and the outer support ring 43 and the intermediate support ring 44 extend outward, so that the extension rod 2 is concentric with the hole of the connecting roller of the insulation wall 6 and strengthens The bottom rod 1 is sealed with the insulation wall 6, and the connection is covered with a sealing baffle 23 to reduce heat loss. After the length and concentricity are adjusted, the outer control rings 53 on both sides pull the locking rod 51 inward, and the locking support block 541 locks the length between the bottom rod 1 and the extension rod 2. The stop groove 521 of the locking rod 51 contacts the driven turntable 42, and the fixed base 41 is not affected by the rotation of the locking rod 51, and the support is also locked. At this time, the bottom rod 1 and the extension rod 2 are rotated for heat treatment of the transport hub, and the connecting rod 2 can rotate on the sealing baffle 23 and drive the middle bottom rod 1 to rotate for transportation.

[0076] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A roller hearth furnace for heat treatment of aluminum alloy wheels, comprising a bottom roller (1) and a furnace wall (11); Its characteristics are: The bottom rod (1) is detachably connected to the inner surface of the furnace wall (11), and an extension rod (2) for adjusting the length is provided at both ends of the bottom rod (1). An inner support member (3) for internal support is provided on the inner surface of the bottom rod (1). An inner support member (4) for connecting to the furnace wall (11) is provided at one end of the extension rod (2). A locking member (5) for locking the variation of the extension rod (2) and the inner support member (4) is provided on the inner surface of the inner support member (4). An insulating wall (6) for heat insulation is provided on the inner surface of the furnace wall (11). The bottom stick (1) is hollow inside; The extension rod (2) includes a connecting slot (21), the connecting slot (21) is provided on the outer surface of the bottom rod (1), the inner surface of the bottom rod (1) is slidably connected to a connecting rod (22), the outer surface of the connecting rod (22) is fixedly connected to a connecting pin (221), the outer surface of the connecting rod (22) is provided with a control slot (222), one end of the connecting rod (22) is provided with a limiting slot (223), and the other end of the connecting rod (22) is rotatably connected to a sealing baffle (23); The connecting pin (221) is slidably connected to the connecting slot (21), and the connecting rod (22) penetrates the inner surface of the bottom stick (1); The inner support member (4) includes a fixed base (41), the fixed base (41) is fixedly connected to the outer surface of the sealing baffle (23), the inner surface of the fixed base (41) is provided with four direct-acting grooves (411), one end of the fixed base (41) is rotatably connected to a driven turntable (42), the outer surface of the driven turntable (42) is provided with four toggle grooves (421), a rotation slot (422) is provided at the center of the driven turntable (42), the outer surface of the fixed base (41) is slidably connected to four annularly distributed outer support rings (43), one side surface of the outer support ring (43) is fixedly connected to a driven rod (431), the outer surface of the outer support ring (43) is slidably connected to an intermediate support ring (44), both sides of the intermediate support ring (44) are hingedly connected to intermediate hinge rods (441), and the outer surface of the intermediate support ring (44) is fixedly connected to an outer covering plate (45); The driven rod (431) is slidably connected to the inner surface of the direct-acting groove (411), and the top surface of the driven rod (431) is slidably connected to the inner surfaces of the direct-acting groove (411) and the toggle groove (421). The intermediate support rings (44) are symmetrically distributed at both ends of the fixed base (41), and the number of the intermediate support rings (44) at each end is four. The intermediate support rings (44) are annularly distributed on the outer surface of the fixed base (41), and the four intermediate support rings (44) are all located between the two outer support rings (43). The other end of the intermediate hinge rod (441) is hingedly connected to the outer surface of the outer support ring (43). The number of the outer cover plates (45) is four, and the outer cover plates (45) are slidably connected to the outer surface of the fixed base (41). The driven rod (431) is capable of linearly moving in the direct-acting groove (411), and the driven rod (431) is located at the overlap of the direct-acting groove (411) and the toggle groove (421). When the driven turntable (42) rotates, the overlap area of ​​the toggle groove (421) and the direct-acting groove (411) changes, thereby causing the driven rod (431) to push the outer support ring (43) to move outward or inward.

2. The roller hearth furnace for heat treatment of aluminum alloy wheel hub according to claim 1, characterized in that: The control slot (222) is 90 degrees, and the limit slot (223) is 90 degrees and symmetrically distributed on both sides of the connecting rod (22).

3. The roller hearth furnace for heat treatment of aluminum alloy wheel hub according to claim 2, characterized in that: The inner support member (3) includes a support slider (31), the support sliders (31) are equidistantly distributed on the inner surface of the bottom stick (1), and one support slider (31) at one end is fixedly connected to the inner surface of the bottom stick (1), the outer surface of the support slider (31) is hingedly connected to four annularly distributed external hinge rods (32), one end of the external hinge rod (32) is hingedly connected to a movable connection groove (33), the outer surface of the movable connection groove (33) is slidably connected to an inner connection block (34), the inner surface of the bottom stick (1) is slidably connected to a docking joint (35), and the docking joint (35) is hingedly connected to the inner connection block (34) through the outer hinge rod (32), the outer surface of the docking joint (35) is provided with a docking locking groove (351), and the inner surface of the bottom stick (1) is provided with a support limit groove (36).

4. The roller hearth furnace for heat treatment of aluminum alloy wheel hub according to claim 3, characterized in that: The inner connecting blocks (34) are distributed at equal intervals, and each inner connecting block (34) is located between two supporting sliders (31). The number of the movable connecting grooves (33) on each inner connecting block (34) is four and they are distributed in an annular manner. The supporting slider (31) and the docking joint (35) are both slidably connected to the inner surface of the supporting limit groove (36), and the docking joint (35) is fixedly connected to the connecting rod (22).

5. The roller hearth furnace for heat treatment of aluminum alloy wheel hub according to claim 1, characterized in that: The locking member (5) includes a locking rod (51), the locking rod (51) passes through the connecting rod (22), the fixed base (41), and the driven turntable (42), the outer surface of the locking rod (51) is provided with a rotating plug (52), the outer surface of the locking rod (51) is provided with a stop groove (521), the outer surface of the locking rod (51) is fixedly connected to an outer control ring (53), the outer surface of the locking rod (51) is fixedly connected to a connecting ring (54), both sides of the connecting ring (54) are hingedly connected to locking support blocks (541), and one end of the locking rod (51) is fixedly connected to a locking plug (55).

6. The roller hearth furnace for heat treatment of aluminum alloy wheel hub according to claim 5, characterized in that: The rotating insert (52) is engaged with the rotating slot (422), the stopping groove (521) is slidably connected to the rotating slot (422), the outer control ring (53) is slidably connected to the inner surface of the control slot (222), the locking support block (541) is slidably connected to the inner surface of the limiting slot (223), the locking support block (541) is in contact with the inner surface of the bottom rod (1), and the locking insert (55) matches the size of the docking locking slot (351).

7. The roller hearth furnace for heat treatment of aluminum alloy wheel hub according to claim 6, characterized in that: The thermal insulation wall (6) comprises a ceramic fiber prefabricated block (61), a roller connection hole (611) is provided on the outer surface of the ceramic fiber prefabricated block (61), a mounting buckle (612) is fixedly connected to the outer surface of the ceramic fiber prefabricated block (61), a module housing (62) is fixedly connected to the bottom surface of the ceramic fiber prefabricated block (61), a ceramic fiber module (63) is fixedly connected to the inner surface of the module housing (62), and a ceramic fiber blanket (631) is fixedly connected to the outer surface of the ceramic fiber module (63).

8. The roller hearth furnace for heat treatment of aluminum alloy wheel hub according to claim 7, characterized in that: The roller connection hole (611) contacts the outer surfaces of both the outer support ring (43) and the intermediate support ring (44); the ceramic fiber prefabricated block (61) is made of a lightweight hard material; and the ceramic fiber modules (63) are arranged longitudinally.

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